* RE: [PATCH] staging: exfat: add exfat filesystem code to
[not found] ` <003601d56d03$aa04fa00$fe0eee00$@samsung.com>
@ 2019-09-17 3:02 ` Namjae Jeon
2019-09-17 4:19 ` Valdis Klētnieks
` (2 more replies)
0 siblings, 3 replies; 24+ messages in thread
From: Namjae Jeon @ 2019-09-17 3:02 UTC (permalink / raw)
To: 'Greg KH'
Cc: alexander.levin, devel, linux-fsdevel, linux-kernel,
'Valdis Kletnieks',
sergey.senozhatsky, Namjae Jeon, namjae.jeon
We are excited to see this happening and would like to state that we appreciate
time and
effort which people put into upstreaming exfat. Thank you!
However, if possible, can we step back a little bit and re-consider it? We
would prefer to
see upstream the code which we are currently using in our products - sdfat - as
this can
be mutually benefitial from various points of view.
Thanks!
> ---------- Forwarded message ---------
> 보낸사람: Ju Hyung Park <qkrwngud825@gmail.com>
> Date: 2019년 9월 16일 (월) 오전 3:49
> Subject: Re: [PATCH] staging: exfat: add exfat filesystem code to
> To: Greg KH <gregkh@linuxfoundation.org>
> Cc: <alexander.levin@microsoft.com>, <devel@driverdev.osuosl.org>, <linux-
> fsdevel@vger.kernel.org>, <linux-kernel@vger.kernel.org>, Valdis Kletnieks
> <valdis.kletnieks@vt.edu>
>
>
> Hi Greg,
>
> On Sun, Sep 15, 2019 at 10:54 PM Greg KH <gregkh@linuxfoundation.org> wrote:
> > Note, this just showed up publically on August 12, where were you with
> > all of this new code before then? :)
>
> My sdFAT port, exfat-nofuse and the one on the staging tree, were all
> made by Samsung.
> And unless you guys had a chance to talk to Samsung developers
> directly, those all share the same faith of lacking proper development
> history.
>
> The source I used was from http://opensource.samsung.com, which
> provides kernel sources as tar.gz files.
> There is no code history available.
>
> > For the in-kernel code, we would have to rip out all of the work you did
> > for all older kernels, so that's a non-starter right there.
>
> I'm aware.
> I'm just letting mainline know that there is potentially another (much
> better) base that could be upstreamed.
>
> If you want me to rip out older kernel support for upstreaming, I'm
> more than happy to do so.
>
> > As for what codebase to work off of, I don't want to say it is too late,
> > but really, this shows up from nowhere and we had to pick something so
> > we found the best we could at that point in time.
>
> To be honest, whole public exFAT sources are all from nowhere unless
> you had internal access to Samsung's development archive.
> The one in the current staging tree isn't any better.
>
> I'm not even sure where the staging driver is from, actually.
>
> Samsung used the 1.2.x versioning until they switched to a new code
> base - sdFAT.
> The one in the staging tree is marked version 1.3.0(exfat_super.c).
> I failed to find anything 1.3.x from Samsung's public kernel sources.
>
> The last time exFAT 1.2.x was used was in Galaxy S7(released in 2016).
> Mine was originally based on sdFAT 2.1.10, used in Galaxy S10(released
> in March 2019) and it just got updated to 2.2.0, used in Galaxy
> Note10(released in August 2019).
>
> > Is there anything specific in the codebase you have now, that is lacking
> > in the in-kernel code? Old-kernel-support doesn't count here, as we
> > don't care about that as it is not applicable. But functionality does
> > matter, what has been added here that we can make use of?
>
> This is more of a suggestion of
> "Let's base on a *much more recent* snapshot for the community to work on",
> since the current one on the staging tree also lacks development history.
>
> The diff is way too big to even start understanding the difference.
>
>
> With that said though, I do have some vague but real reason as to why
> sdFAT base is better.
>
> With some major Android vendors showing interests in supporting exFAT,
> Motorola notably published their work on public Git repository with
> full development history(the only vendor to do this that I'm aware
> of).
> Commits like this:
> https://github.com/MotorolaMobilityLLC/kernel-msm/commit/7ab1657 is
> not merged to exFAT(including the current staging tree one) while it
> did for sdFAT.
>
>
> The only thing I regret is not working on porting sdFAT sooner.
> I definitely didn't anticipate Microsoft to suddenly lift legal issues
> on upstreaming exFAT just around when I happen to gain interest in
> porting sdFAT.
>
> If my port happened sooner, it would have been a no-brainer for it to
> be considered as a top candidate for upstreaming.
>
> > And do you have any "real" development history to look at instead of the
> > "one giant commit" of the initial code drop? That is where we could
> > actually learn what has changed over time. Your repo as-is shows none
> > of the interesting bits :(
>
> As I mentioned, development history is unobtainable, even for the
> current staging tree or exfat-nofuse.
> (If you guys took exfat-nofuse, you can also see that there's barely
> any real exFAT-related development done in that tree. Everything is
> basically fixes for newer kernel versions.)
>
> The best I could do, if someone's interested, is to diff all versions
> of exFAT/sdFAT throughout the Samsung's kernel versions, but that
> still won't give us reasons as to why the changes were made.
>
> TL;DR
> My suggestion - Let's base on a much newer driver that's matured more,
> contains more fixes, gives (slightly?) better performance and
> hopefully has better code quality.
>
> Both drivers are horrible.
> You said it yourself(for the current staging one), and even for my new
> sdFAT-base proposal, I'm definitely not comfortable seeing this kind
> of crap in mainline:
> https://github.com/arter97/exfat-linux/commit/0f1ddde
>
> However, it's clear to me that the sdFAT base is less-horrible.
>
> Please let me know what you think.
>
> > thanks,
> >
> > greg kh
>
> Thanks.
>
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-17 3:02 ` [PATCH] staging: exfat: add exfat filesystem code to Namjae Jeon
@ 2019-09-17 4:19 ` Valdis Klētnieks
2019-09-17 5:31 ` Park Ju Hyung
2019-09-17 4:56 ` 'Greg KH'
2019-09-17 5:15 ` Gao Xiang
2 siblings, 1 reply; 24+ messages in thread
From: Valdis Klētnieks @ 2019-09-17 4:19 UTC (permalink / raw)
To: Namjae Jeon
Cc: 'Greg KH',
alexander.levin, devel, linux-fsdevel, linux-kernel,
sergey.senozhatsky, Namjae Jeon
[-- Attachment #1: Type: text/plain, Size: 1247 bytes --]
On Tue, 17 Sep 2019 12:02:01 +0900, "Namjae Jeon" said:
> We are excited to see this happening and would like to state that we appreciate time and
> effort which people put into upstreaming exfat. Thank you!
The hard part - getting Microsoft to OK merging an exfat driver - is done.
All we need now is to get a driver cleaned up. :)
> However, if possible, can we step back a little bit and re-consider it? We would prefer to
> see upstream the code which we are currently using in our products - sdfat - as
> this can be mutually benefitial from various points of view.
I'm working off a somewhat cleaned up copy of Samsung's original driver,
because that's what I had knowledge of. If the sdfat driver is closer to being
mergeable, I'd not object if that got merged instead.
But here's the problem... Samsung has their internal sdfat code, Park Yu Hyung
has what appears to be a fork of that code from some point (and it's unclear ,
and it's unclear which one has had more bugfixes and cleanups to get it to
somewhere near mainline mergeable.
Can you provide a pointer to what Samsung is *currently* using? We probably
need to stop and actually look at the code bases and see what's in the best
shape currently.
[-- Attachment #2: Type: application/pgp-signature, Size: 832 bytes --]
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-17 4:19 ` Valdis Klētnieks
@ 2019-09-17 5:31 ` Park Ju Hyung
2019-09-17 5:47 ` Greg KH
0 siblings, 1 reply; 24+ messages in thread
From: Park Ju Hyung @ 2019-09-17 5:31 UTC (permalink / raw)
To: valdis.kletnieks, gregkh, namjae.jeon
Cc: alexander.levin, devel, linkinjeon, linux-fsdevel, linux-kernel,
sergey.senozhatsky
On Tue, 17 Sep 2019 00:19:36 -0400, "Valdis Klētnieks" said:
> I'm working off a somewhat cleaned up copy of Samsung's original driver,
> because that's what I had knowledge of. If the sdfat driver is closer to being
> mergeable, I'd not object if that got merged instead.
Greg, as Valdis mentioned here, the staging tree driver is just another exFAT fork
from Samsung.
What's the point of using a much older driver?
sdFAT is clearly more matured and been put into more recent production softwares.
And as I wrote in previous email, it does include some real fixes.
As Namjae said too, Samsung would be more interested in merging sdFAT to upstream.
If we diverge, Samsung will have less reasons to contribute their patches to upstream.
Also, I think it makes much more sense to make Samsung the maintainer of this driver
(if they're willing to put in the manpower to do so). Asking them would be the first
step in doing so.
> But here's the problem... Samsung has their internal sdfat code, Park Yu Hyung
> has what appears to be a fork of that code from some point (and it's unclear ,
> and it's unclear which one has had more bugfixes and cleanups to get it to
> somewhere near mainline mergeable.
I made it extremely clear on where I took the code.
The initial commit: "sdfat: import from G973FXXU3ASG8" states which kernel source
I used.
You can simply search "G973FXXU3ASG8" on http://opensource.samsung.com and download
the source code. It'll match exactly with my initial commit.
My repository is basically rename + clean-up + older kernel compat.
I think we can all agree that using the sdFAT naming on non-Android is very
misleading, which is why I renamed it to exFAT.
sdFAT includes support for fat16/32, and as also mentioned in
https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git/commit/?h=staging-next&id=58985a9d2d03e977db93bf574a16162766a318fe
this isn't desirable, especially in mainline.
I cleaned it up and removed some other Samsung's code that relies on proprietary
userspace tools such as defrag.
I believe my repository is in the cleanest state for getting merged to mainline,
compared to other drivers avilable out there.
If we happen to pick it to mainline, I think it'll also be quite trivial for Samsung
to pick mainline patches back to their sdFAT drivers used in Galaxy devices.
> Can you provide a pointer to what Samsung is *currently* using? We probably
> need to stop and actually look at the code bases and see what's in the best
> shape currently.
Namjae could probably elaborate here, but if I were to guess, there wasn't a
noticeable difference in recent sdFAT releases. Even the lastest Note10 kernel only
had some uevent changes.
I think the current latest public source's driver is the best one available.
Thanks.
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-17 5:31 ` Park Ju Hyung
@ 2019-09-17 5:47 ` Greg KH
2019-09-17 6:04 ` Ju Hyung Park
0 siblings, 1 reply; 24+ messages in thread
From: Greg KH @ 2019-09-17 5:47 UTC (permalink / raw)
To: Park Ju Hyung
Cc: valdis.kletnieks, namjae.jeon, devel, linkinjeon, linux-kernel,
alexander.levin, sergey.senozhatsky, linux-fsdevel
On Tue, Sep 17, 2019 at 02:31:34PM +0900, Park Ju Hyung wrote:
> On Tue, 17 Sep 2019 00:19:36 -0400, "Valdis Klētnieks" said:
> > I'm working off a somewhat cleaned up copy of Samsung's original driver,
> > because that's what I had knowledge of. If the sdfat driver is closer to being
> > mergeable, I'd not object if that got merged instead.
>
> Greg, as Valdis mentioned here, the staging tree driver is just another exFAT fork
> from Samsung.
> What's the point of using a much older driver?
It's the fact that it actually was in a form that could be merged, no
one has done that with the sdfat code :)
> sdFAT is clearly more matured and been put into more recent production softwares.
> And as I wrote in previous email, it does include some real fixes.
What fixes? That's what I'm asking here.
How do we "know" that this is better than what we currently have today?
We don't, so it's a bit hard to tell someone, "delete the work you did
and replace it with this other random chunk of code, causing you a bunch
more work in the process for no specific reason other than it looks
'newer'." :(
> As Namjae said too, Samsung would be more interested in merging sdFAT to upstream.
> If we diverge, Samsung will have less reasons to contribute their patches to upstream.
Are they going to do this if we do take the sdfat code? If so, great,
but I need to get someone to agree that this will happen.
> Also, I think it makes much more sense to make Samsung the maintainer of this driver
> (if they're willing to put in the manpower to do so). Asking them would be the first
> step in doing so.
They are more than willing to start contributing and being a
co-maintainer of it, it needs all the help it can get.
But "someone" from samsung, or anywhere else, has to be willing to step
up here and do this work. Without that happening, I don't see a reason
to change at this point in time.
Rembember, kernel development happens because people do the work, which
Valdis did, and continues to do. Throwing that away because of the
thought that someone else might do some work in the future is not how we
work.
I recommend looking at what we have in the tree now, and seeing what is
missing compared to "sdfat". I know a lot of places in the exfat code
that needs to be fixed up, odds are they are the same stuff that needs
to be resolved in sdfat as well.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-17 5:47 ` Greg KH
@ 2019-09-17 6:04 ` Ju Hyung Park
2019-09-18 2:35 ` Namjae Jeon
0 siblings, 1 reply; 24+ messages in thread
From: Ju Hyung Park @ 2019-09-17 6:04 UTC (permalink / raw)
To: Greg KH, namjae.jeon, Valdis Kletnieks
Cc: devel, linkinjeon, linux-kernel, alexander.levin,
sergey.senozhatsky, linux-fsdevel
On Tue, Sep 17, 2019 at 2:47 PM Greg KH <gregkh@linuxfoundation.org> wrote:
> It's the fact that it actually was in a form that could be merged, no
> one has done that with the sdfat code :)
Well, I'm more than happy to help if you guys are happy with merging
the new base.
> What fixes? That's what I'm asking here.
I gave this as an example in my previous email:
https://github.com/MotorolaMobilityLLC/kernel-msm/commit/7ab1657
> How do we "know" that this is better than what we currently have today?
> We don't, so it's a bit hard to tell someone, "delete the work you did
> and replace it with this other random chunk of code, causing you a bunch
> more work in the process for no specific reason other than it looks
> 'newer'." :(
The new sdFAT base I'm suggesting, is just as "random" as the one
staging tree is based on.
If exFAT gets merged to Torvald's tree, there will be a lot more eyes
interested in it.
If there's a better base, we better switch to it now and prevent
further headaches long-term.
It's really hard to compare those 2 drivers base and extract
meaningful changelogs.
But regardless, here are some diff stats:
<Full diff stat>
Kconfig | 79 +-
Makefile | 46 +-
api.c | 423 ----
api.h | 310 ---
blkdev.c | 409 +---
cache.c | 1142 ++++-----
config.h | 49 -
core.c | 5583 ++++++++++++++++++++++++--------------------
core.h | 196 --
core_exfat.c | 1553 ------------
exfat.h | 1309 +++++++----
exfat_fs.h | 417 ----
extent.c | 351 ---
fatent.c | 182 --
misc.c | 401 ----
nls.c | 490 ++--
super.c | 5103 +++++++++++++++++++++-------------------
upcase.c | 740 ++++++
upcase.h | 407 ----
version.h | 29 -
xattr.c | 136 --
21 files changed, 8186 insertions(+), 11169 deletions(-)
<diff-filter=M>
Kconfig | 79 +-
Makefile | 46 +-
blkdev.c | 409 +---
cache.c | 1142 +++++-----
core.c | 5583 ++++++++++++++++++++++++++----------------------
exfat.h | 1309 ++++++++----
nls.c | 490 ++---
super.c | 5103 ++++++++++++++++++++++---------------------
8 files changed, 7446 insertions(+), 6715 deletions(-)
> I recommend looking at what we have in the tree now, and seeing what is
> missing compared to "sdfat". I know a lot of places in the exfat code
> that needs to be fixed up, odds are they are the same stuff that needs
> to be resolved in sdfat as well.
Would there be any more data that I can provide?
It's really hard to go through the full diff :(
Thanks.
^ permalink raw reply [flat|nested] 24+ messages in thread
* RE: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-17 6:04 ` Ju Hyung Park
@ 2019-09-18 2:35 ` Namjae Jeon
2019-09-18 6:16 ` 'Greg KH'
0 siblings, 1 reply; 24+ messages in thread
From: Namjae Jeon @ 2019-09-18 2:35 UTC (permalink / raw)
To: 'Ju Hyung Park', 'Greg KH', 'Valdis Kletnieks'
Cc: devel, linkinjeon, linux-kernel, alexander.levin,
sergey.senozhatsky, linux-fsdevel, sj1557.seo
I've summarized some of the big differences between sdfat and exfat
in linux-next.
1. sdfat has been refactored to improve compatibility, readability and
to be linux friendly.(included support mass storages larger than 2TB.)
2. sdfat has been optimized for the performance of SD-cards.
- Support SD-card friendly block allocation and delayed allocation
for vfat-fs only.
- Support aligned_mpage_write for both vfat-fs and exfat-fs
3. sdfat has been optimized for the performance of general operations
like create,lookup and readdir.
4. Fix many critical and minor bugs
- Handle many kinds of error conditions gracefully to prevent panic.
- Fix critical bugs related to rmdir, truncate behavior and so on...
5. Fix NLS functions
Note, that Samsung is still improving sdfat driver. For instance,
what will be realeased soon is sdfat v2.3.0, which will include support
for "UtcOffset" of "File Directory Entry", in order to satisfy
exFAT specification 7.4.
Thanks!
> -----Original Message-----
> From: Ju Hyung Park [mailto:qkrwngud825@gmail.com]
> Sent: Tuesday, September 17, 2019 3:04 PM
> To: Greg KH; namjae.jeon@samsung.com; Valdis Kletnieks
> Cc: devel@driverdev.osuosl.org; linkinjeon@gmail.com; linux-
> kernel@vger.kernel.org; alexander.levin@microsoft.com;
> sergey.senozhatsky@gmail.com; linux-fsdevel@vger.kernel.org
> Subject: Re: [PATCH] staging: exfat: add exfat filesystem code to
>
> On Tue, Sep 17, 2019 at 2:47 PM Greg KH <gregkh@linuxfoundation.org> wrote:
> > It's the fact that it actually was in a form that could be merged, no
> > one has done that with the sdfat code :)
>
> Well, I'm more than happy to help if you guys are happy with merging
> the new base.
>
> > What fixes? That's what I'm asking here.
>
> I gave this as an example in my previous email:
> https://github.com/MotorolaMobilityLLC/kernel-msm/commit/7ab1657
>
> > How do we "know" that this is better than what we currently have today?
> > We don't, so it's a bit hard to tell someone, "delete the work you did
> > and replace it with this other random chunk of code, causing you a bunch
> > more work in the process for no specific reason other than it looks
> > 'newer'." :(
>
> The new sdFAT base I'm suggesting, is just as "random" as the one
> staging tree is based on.
>
> If exFAT gets merged to Torvald's tree, there will be a lot more eyes
> interested in it.
> If there's a better base, we better switch to it now and prevent
> further headaches long-term.
>
> It's really hard to compare those 2 drivers base and extract
> meaningful changelogs.
>
> But regardless, here are some diff stats:
> <Full diff stat>
> Kconfig | 79 +-
> Makefile | 46 +-
> api.c | 423 ----
> api.h | 310 ---
> blkdev.c | 409 +---
> cache.c | 1142 ++++-----
> config.h | 49 -
> core.c | 5583 ++++++++++++++++++++++++--------------------
> core.h | 196 --
> core_exfat.c | 1553 ------------
> exfat.h | 1309 +++++++----
> exfat_fs.h | 417 ----
> extent.c | 351 ---
> fatent.c | 182 --
> misc.c | 401 ----
> nls.c | 490 ++--
> super.c | 5103 +++++++++++++++++++++-------------------
> upcase.c | 740 ++++++
> upcase.h | 407 ----
> version.h | 29 -
> xattr.c | 136 --
> 21 files changed, 8186 insertions(+), 11169 deletions(-)
>
> <diff-filter=M>
> Kconfig | 79 +-
> Makefile | 46 +-
> blkdev.c | 409 +---
> cache.c | 1142 +++++-----
> core.c | 5583 ++++++++++++++++++++++++++----------------------
> exfat.h | 1309 ++++++++----
> nls.c | 490 ++---
> super.c | 5103 ++++++++++++++++++++++---------------------
> 8 files changed, 7446 insertions(+), 6715 deletions(-)
>
> > I recommend looking at what we have in the tree now, and seeing what is
> > missing compared to "sdfat". I know a lot of places in the exfat code
> > that needs to be fixed up, odds are they are the same stuff that needs
> > to be resolved in sdfat as well.
>
> Would there be any more data that I can provide?
> It's really hard to go through the full diff :(
>
> Thanks.
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 2:35 ` Namjae Jeon
@ 2019-09-18 6:16 ` 'Greg KH'
2019-09-18 6:33 ` Sergey Senozhatsky
0 siblings, 1 reply; 24+ messages in thread
From: 'Greg KH' @ 2019-09-18 6:16 UTC (permalink / raw)
To: Namjae Jeon
Cc: 'Ju Hyung Park', 'Valdis Kletnieks',
devel, linkinjeon, linux-kernel, alexander.levin,
sergey.senozhatsky, linux-fsdevel, sj1557.seo
A: http://en.wikipedia.org/wiki/Top_post
Q: Were do I find info about this thing called top-posting?
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
A: No.
Q: Should I include quotations after my reply?
http://daringfireball.net/2007/07/on_top
On Wed, Sep 18, 2019 at 11:35:08AM +0900, Namjae Jeon wrote:
> I've summarized some of the big differences between sdfat and exfat
> in linux-next.
>
> 1. sdfat has been refactored to improve compatibility, readability and
> to be linux friendly.(included support mass storages larger than 2TB.)
>
> 2. sdfat has been optimized for the performance of SD-cards.
> - Support SD-card friendly block allocation and delayed allocation
> for vfat-fs only.
> - Support aligned_mpage_write for both vfat-fs and exfat-fs
>
> 3. sdfat has been optimized for the performance of general operations
> like create,lookup and readdir.
>
> 4. Fix many critical and minor bugs
> - Handle many kinds of error conditions gracefully to prevent panic.
> - Fix critical bugs related to rmdir, truncate behavior and so on...
>
> 5. Fix NLS functions
Those are all wonderful things, any chances you can point out the
individual commits that reflect these bugfixes?
> Note, that Samsung is still improving sdfat driver. For instance,
> what will be realeased soon is sdfat v2.3.0, which will include support
> for "UtcOffset" of "File Directory Entry", in order to satisfy
> exFAT specification 7.4.
If Samsung is going to continue to keep its internal tree for this
driver, there's no way we can take a code dump today and expect things
to keep in sync.
If Samsung agrees to do development of this codebase upstream in the
kernel tree, I will be glad to consider moving to this codebase instead
and working together on it. Otherwise it makes no sense as things
instantly diverge with no way of keeping in sync (we only can commit to
one tree, while you can in both.)
If Samsung wishes to use their sdfat codebase as the "seed" to work from
for this, please submit a patch adding the latest version to the kernel
tree and we can compare and work from there.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 6:16 ` 'Greg KH'
@ 2019-09-18 6:33 ` Sergey Senozhatsky
2019-09-18 8:26 ` 'Greg KH'
0 siblings, 1 reply; 24+ messages in thread
From: Sergey Senozhatsky @ 2019-09-18 6:33 UTC (permalink / raw)
To: 'Greg KH'
Cc: Namjae Jeon, 'Ju Hyung Park', 'Valdis Kletnieks',
devel, linkinjeon, linux-kernel, alexander.levin,
sergey.senozhatsky, linux-fsdevel, sj1557.seo
On (09/18/19 08:16), 'Greg KH' wrote:
[..]
> > Note, that Samsung is still improving sdfat driver. For instance,
> > what will be realeased soon is sdfat v2.3.0, which will include support
> > for "UtcOffset" of "File Directory Entry", in order to satisfy
> > exFAT specification 7.4.
>
[..]
> If Samsung wishes to use their sdfat codebase as the "seed" to work from
> for this, please submit a patch adding the latest version to the kernel
> tree and we can compare and work from there.
Isn't it what Ju Hyung did? He took sdfat codebase (the most recent
among publicly available) as the seed, cleaned it up a bit and submitted
as a patch. Well, technically, Valdis did the same, it's just he forked
a slightly more outdated (and not anymore used by Samsung) codebase.
-ss
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 6:33 ` Sergey Senozhatsky
@ 2019-09-18 8:26 ` 'Greg KH'
2019-09-18 8:51 ` Sergey Senozhatsky
2019-09-18 9:01 ` Ju Hyung Park
0 siblings, 2 replies; 24+ messages in thread
From: 'Greg KH' @ 2019-09-18 8:26 UTC (permalink / raw)
To: Sergey Senozhatsky
Cc: Namjae Jeon, 'Ju Hyung Park', 'Valdis Kletnieks',
devel, linkinjeon, linux-kernel, alexander.levin,
sergey.senozhatsky, linux-fsdevel, sj1557.seo
On Wed, Sep 18, 2019 at 03:33:04PM +0900, Sergey Senozhatsky wrote:
> On (09/18/19 08:16), 'Greg KH' wrote:
> [..]
> > > Note, that Samsung is still improving sdfat driver. For instance,
> > > what will be realeased soon is sdfat v2.3.0, which will include support
> > > for "UtcOffset" of "File Directory Entry", in order to satisfy
> > > exFAT specification 7.4.
> >
> [..]
> > If Samsung wishes to use their sdfat codebase as the "seed" to work from
> > for this, please submit a patch adding the latest version to the kernel
> > tree and we can compare and work from there.
>
> Isn't it what Ju Hyung did? He took sdfat codebase (the most recent
> among publicly available) as the seed, cleaned it up a bit and submitted
> as a patch.
He did? I do not see a patch anywhere, what is the message-id of it?
> Well, technically, Valdis did the same, it's just he forked a slightly
> more outdated (and not anymore used by Samsung) codebase.
He took the "best known at the time" codebase, as we had nothing else to
work with.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 8:26 ` 'Greg KH'
@ 2019-09-18 8:51 ` Sergey Senozhatsky
2019-09-18 9:01 ` Ju Hyung Park
1 sibling, 0 replies; 24+ messages in thread
From: Sergey Senozhatsky @ 2019-09-18 8:51 UTC (permalink / raw)
To: 'Greg KH'
Cc: Sergey Senozhatsky, Namjae Jeon, 'Ju Hyung Park',
'Valdis Kletnieks',
devel, linkinjeon, linux-kernel, alexander.levin,
sergey.senozhatsky, linux-fsdevel, sj1557.seo
On (09/18/19 10:26), 'Greg KH' wrote:
> On Wed, Sep 18, 2019 at 03:33:04PM +0900, Sergey Senozhatsky wrote:
> > On (09/18/19 08:16), 'Greg KH' wrote:
> > [..]
> > > > Note, that Samsung is still improving sdfat driver. For instance,
> > > > what will be realeased soon is sdfat v2.3.0, which will include support
> > > > for "UtcOffset" of "File Directory Entry", in order to satisfy
> > > > exFAT specification 7.4.
> > >
> > [..]
> > > If Samsung wishes to use their sdfat codebase as the "seed" to work from
> > > for this, please submit a patch adding the latest version to the kernel
> > > tree and we can compare and work from there.
> >
> > Isn't it what Ju Hyung did? He took sdfat codebase (the most recent
> > among publicly available) as the seed, cleaned it up a bit and submitted
> > as a patch.
>
> He did? I do not see a patch anywhere, what is the message-id of it?
Sorry. No, he did not. I somehow thought that he did, but it seems that
I just looked at his github and emails.
> > Well, technically, Valdis did the same, it's just he forked a slightly
> > more outdated (and not anymore used by Samsung) codebase.
>
> He took the "best known at the time" codebase, as we had nothing else to
> work with.
Well, then Valdis probably took it a long long time ago. Current
"best known" is v2.2, publicly available under GPLv2 at opensource.samsung.com
-ss
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 8:26 ` 'Greg KH'
2019-09-18 8:51 ` Sergey Senozhatsky
@ 2019-09-18 9:01 ` Ju Hyung Park
2019-09-18 9:24 ` Dan Carpenter
1 sibling, 1 reply; 24+ messages in thread
From: Ju Hyung Park @ 2019-09-18 9:01 UTC (permalink / raw)
To: Greg KH
Cc: Sergey Senozhatsky, Namjae Jeon, Valdis Kletnieks, devel,
linkinjeon, linux-kernel, alexander.levin, sergey.senozhatsky,
linux-fsdevel, sj1557.seo
On Wed, Sep 18, 2019 at 5:33 PM Greg KH <gregkh@linuxfoundation.org> wrote:
> He did? I do not see a patch anywhere, what is the message-id of it?
I'm just repeating myself at this point, but again, I'm more than
willing to work on a patch.
I just want to make it clear on how should I.
> He took the "best known at the time" codebase, as we had nothing else to
> work with.
It wasn't the "best known at the time". sdFAT has been around now for years.
Thanks.
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 9:01 ` Ju Hyung Park
@ 2019-09-18 9:24 ` Dan Carpenter
2019-09-18 9:53 ` Ju Hyung Park
` (2 more replies)
0 siblings, 3 replies; 24+ messages in thread
From: Dan Carpenter @ 2019-09-18 9:24 UTC (permalink / raw)
To: Ju Hyung Park
Cc: Greg KH, devel, linkinjeon, Valdis Kletnieks, Sergey Senozhatsky,
Namjae Jeon, linux-kernel, alexander.levin, sergey.senozhatsky,
linux-fsdevel, sj1557.seo
On Wed, Sep 18, 2019 at 06:01:09PM +0900, Ju Hyung Park wrote:
> On Wed, Sep 18, 2019 at 5:33 PM Greg KH <gregkh@linuxfoundation.org> wrote:
> > He did? I do not see a patch anywhere, what is the message-id of it?
>
> I'm just repeating myself at this point, but again, I'm more than
> willing to work on a patch.
> I just want to make it clear on how should I.
Put it in drivers/staging/sdfat/.
But really we want someone from Samsung to say that they will treat
the staging version as upstream. It doesn't work when people apply
fixes to their version and a year later back port the fixes into
staging. The staging tree is going to have tons and tons of white space
fixes so backports are a pain. All development needs to be upstream
first where the staging driver is upstream. Otherwise we should just
wait for Samsung to get it read to be merged in fs/ and not through the
staging tree.
regards,
dan carpenter
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 9:24 ` Dan Carpenter
@ 2019-09-18 9:53 ` Ju Hyung Park
2019-09-18 10:08 ` Dan Carpenter
2019-09-19 2:14 ` Namjae Jeon
2019-09-30 4:25 ` Namjae Jeon
2 siblings, 1 reply; 24+ messages in thread
From: Ju Hyung Park @ 2019-09-18 9:53 UTC (permalink / raw)
To: Dan Carpenter
Cc: Greg KH, devel, linkinjeon, Valdis Kletnieks, Sergey Senozhatsky,
Namjae Jeon, linux-kernel, alexander.levin, sergey.senozhatsky,
linux-fsdevel, sj1557.seo
Hi Dan,
On Wed, Sep 18, 2019 at 6:27 PM Dan Carpenter <dan.carpenter@oracle.com> wrote:
> Put it in drivers/staging/sdfat/.
It'll conflict with the current exfat staging drivers.
And moreover, I don't think it makes sense to use sdfat naming in mainline.
Samsung uses it since it handles all fat filesystems.
From what I can tell, that's not in mainline's interests:
https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git/commit/?h=staging-next&id=58985a9d2d03e977db93bf574a16162766a318fe
What I'm proposing is to remove the current exfat drivers and add
sdfat-based one(that I removed fat16/32 handlings and renamed to
exfat).
> But really we want someone from Samsung to say that they will treat
> the staging version as upstream.
Agreed.
Perhaps Namjae didn't pick up our questions with all those mails we
sent during last few days.
Maybe ping him again?
Thanks.
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 9:53 ` Ju Hyung Park
@ 2019-09-18 10:08 ` Dan Carpenter
2019-09-18 10:46 ` Ju Hyung Park
0 siblings, 1 reply; 24+ messages in thread
From: Dan Carpenter @ 2019-09-18 10:08 UTC (permalink / raw)
To: Ju Hyung Park
Cc: devel, linkinjeon, Valdis Kletnieks, Sergey Senozhatsky,
Namjae Jeon, Greg KH, linux-kernel, alexander.levin,
sergey.senozhatsky, linux-fsdevel, sj1557.seo
On Wed, Sep 18, 2019 at 06:53:49PM +0900, Ju Hyung Park wrote:
> Hi Dan,
>
> On Wed, Sep 18, 2019 at 6:27 PM Dan Carpenter <dan.carpenter@oracle.com> wrote:
> > Put it in drivers/staging/sdfat/.
>
> It'll conflict with the current exfat staging drivers.
Use Kconfig.
> And moreover, I don't think it makes sense to use sdfat naming in mainline.
The directory doesn't need to be permanent.
regards,
dan carpenter
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 10:08 ` Dan Carpenter
@ 2019-09-18 10:46 ` Ju Hyung Park
2019-09-18 11:05 ` Greg KH
0 siblings, 1 reply; 24+ messages in thread
From: Ju Hyung Park @ 2019-09-18 10:46 UTC (permalink / raw)
To: Dan Carpenter
Cc: devel, linkinjeon, Valdis Kletnieks, Sergey Senozhatsky,
Namjae Jeon, Greg KH, linux-kernel, alexander.levin,
sergey.senozhatsky, linux-fsdevel, sj1557.seo
On Wed, Sep 18, 2019 at 7:09 PM Dan Carpenter <dan.carpenter@oracle.com> wrote:
> Use Kconfig.
Not just that.
There are a lot of non-static functions that's not marked ex/sdfat-specific.
(which we would have to clean it up eventually)
Even with sdFAT base, there are some non-static functions named as exfat.
Figuring out a solution for this is pretty pointless imho when one of
the drivers will be dropped soon(ish) anyways.
Thanks.
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 10:46 ` Ju Hyung Park
@ 2019-09-18 11:05 ` Greg KH
0 siblings, 0 replies; 24+ messages in thread
From: Greg KH @ 2019-09-18 11:05 UTC (permalink / raw)
To: Ju Hyung Park
Cc: Dan Carpenter, devel, linkinjeon, Valdis Kletnieks,
Sergey Senozhatsky, Namjae Jeon, linux-kernel, alexander.levin,
sergey.senozhatsky, linux-fsdevel, sj1557.seo
On Wed, Sep 18, 2019 at 07:46:25PM +0900, Ju Hyung Park wrote:
> On Wed, Sep 18, 2019 at 7:09 PM Dan Carpenter <dan.carpenter@oracle.com> wrote:
> > Use Kconfig.
>
> Not just that.
> There are a lot of non-static functions that's not marked ex/sdfat-specific.
> (which we would have to clean it up eventually)
Then clean them up :)
> Even with sdFAT base, there are some non-static functions named as exfat.
Then just force both filesystems to only be built as a module and all
should be fine, right?
> Figuring out a solution for this is pretty pointless imho when one of
> the drivers will be dropped soon(ish) anyways.
Given we only have one filesytem that is submitted in patch form, I
think people are making a lot of noise over nothing :)
thanks,
greg k-h
^ permalink raw reply [flat|nested] 24+ messages in thread
* RE: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 9:24 ` Dan Carpenter
2019-09-18 9:53 ` Ju Hyung Park
@ 2019-09-19 2:14 ` Namjae Jeon
2019-09-30 4:25 ` Namjae Jeon
2 siblings, 0 replies; 24+ messages in thread
From: Namjae Jeon @ 2019-09-19 2:14 UTC (permalink / raw)
To: 'Dan Carpenter', 'Greg KH'
Cc: 'Greg KH', devel, linkinjeon, 'Valdis Kletnieks',
'Sergey Senozhatsky',
linux-kernel, alexander.levin, sergey.senozhatsky, linux-fsdevel,
sj1557.seo, 'Ju Hyung Park'
[..]
> Put it in drivers/staging/sdfat/.
>
> But really we want someone from Samsung to say that they will treat
> the staging version as upstream. It doesn't work when people apply
> fixes to their version and a year later back port the fixes into
> staging. The staging tree is going to have tons and tons of white space
> fixes so backports are a pain. All development needs to be upstream
> first where the staging driver is upstream. Otherwise we should just
> wait for Samsung to get it read to be merged in fs/ and not through the
> staging tree.
Quite frankly,
This whole thing came as a huge-huge surprise to us, we did not initiate
upstreaming of exfat/sdfat code and, as of this moment, I'm not exactly
sure that we are prepared for any immediate radical changes to our internal
development process which people all of a sudden want from us. I need to
discuss with related people on internal thread.
please wait a while:)
Thanks!
>
> regards,
> dan carpenter
>
^ permalink raw reply [flat|nested] 24+ messages in thread
* RE: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-18 9:24 ` Dan Carpenter
2019-09-18 9:53 ` Ju Hyung Park
2019-09-19 2:14 ` Namjae Jeon
@ 2019-09-30 4:25 ` Namjae Jeon
2019-09-30 6:08 ` 'Greg KH'
2 siblings, 1 reply; 24+ messages in thread
From: Namjae Jeon @ 2019-09-30 4:25 UTC (permalink / raw)
To: 'Dan Carpenter', 'Greg KH'
Cc: devel, linkinjeon, 'Valdis Kletnieks',
'Sergey Senozhatsky',
linux-kernel, alexander.levin, sergey.senozhatsky, linux-fsdevel,
sj1557.seo, 'Ju Hyung Park'
> [..]
> > Put it in drivers/staging/sdfat/.
> >
> > But really we want someone from Samsung to say that they will treat
> > the staging version as upstream. It doesn't work when people apply
> > fixes to their version and a year later back port the fixes into
> > staging. The staging tree is going to have tons and tons of white space
> > fixes so backports are a pain. All development needs to be upstream
> > first where the staging driver is upstream. Otherwise we should just
> > wait for Samsung to get it read to be merged in fs/ and not through the
> > staging tree.
> Quite frankly,
> This whole thing came as a huge-huge surprise to us, we did not initiate
> upstreaming of exfat/sdfat code and, as of this moment, I'm not exactly
> sure that we are prepared for any immediate radical changes to our internal
> development process which people all of a sudden want from us. I need to
> discuss with related people on internal thread.
> please wait a while:)
We decide to contribute sdfat directly and treat upstream exfat.
Perhaps more time is needed for patch preparation(exfat rename + vfat removal
+ clean-up) and internal processes. After contributing sdfat v2.2.0 as the base,
We will also provide change-set of sdfat v2.3.0 later.
Thanks!
>
> Thanks!
> >
> > regards,
> > dan carpenter
> >
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-30 4:25 ` Namjae Jeon
@ 2019-09-30 6:08 ` 'Greg KH'
0 siblings, 0 replies; 24+ messages in thread
From: 'Greg KH' @ 2019-09-30 6:08 UTC (permalink / raw)
To: Namjae Jeon
Cc: 'Dan Carpenter',
devel, linkinjeon, 'Valdis Kletnieks',
'Sergey Senozhatsky', 'Ju Hyung Park',
linux-kernel, alexander.levin, sergey.senozhatsky, linux-fsdevel,
sj1557.seo
On Mon, Sep 30, 2019 at 01:25:13PM +0900, Namjae Jeon wrote:
>
> > [..]
> > > Put it in drivers/staging/sdfat/.
> > >
> > > But really we want someone from Samsung to say that they will treat
> > > the staging version as upstream. It doesn't work when people apply
> > > fixes to their version and a year later back port the fixes into
> > > staging. The staging tree is going to have tons and tons of white space
> > > fixes so backports are a pain. All development needs to be upstream
> > > first where the staging driver is upstream. Otherwise we should just
> > > wait for Samsung to get it read to be merged in fs/ and not through the
> > > staging tree.
> > Quite frankly,
> > This whole thing came as a huge-huge surprise to us, we did not initiate
> > upstreaming of exfat/sdfat code and, as of this moment, I'm not exactly
> > sure that we are prepared for any immediate radical changes to our internal
> > development process which people all of a sudden want from us. I need to
> > discuss with related people on internal thread.
> > please wait a while:)
> We decide to contribute sdfat directly and treat upstream exfat.
> Perhaps more time is needed for patch preparation(exfat rename + vfat removal
> + clean-up) and internal processes. After contributing sdfat v2.2.0 as the base,
> We will also provide change-set of sdfat v2.3.0 later.
That's wonderful to hear! If you need help getting patches into
mergable shape, just let us know.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-17 3:02 ` [PATCH] staging: exfat: add exfat filesystem code to Namjae Jeon
2019-09-17 4:19 ` Valdis Klētnieks
@ 2019-09-17 4:56 ` 'Greg KH'
2019-09-17 5:15 ` Gao Xiang
2 siblings, 0 replies; 24+ messages in thread
From: 'Greg KH' @ 2019-09-17 4:56 UTC (permalink / raw)
To: Namjae Jeon
Cc: devel, Namjae Jeon, 'Valdis Kletnieks',
linux-kernel, alexander.levin, sergey.senozhatsky, linux-fsdevel
On Tue, Sep 17, 2019 at 12:02:01PM +0900, Namjae Jeon wrote:
> We are excited to see this happening and would like to state that we appreciate
> time and
> effort which people put into upstreaming exfat. Thank you!
>
> However, if possible, can we step back a little bit and re-consider it? We
> would prefer to see upstream the code which we are currently using in
> our products - sdfat - as this can be mutually benefitial from various
> points of view.
What is "different" in it from the code that is currently in linux-next?
What is supported "better"? The code we have today seems to work for
people, so what are we missing here?
Also, submitting patches for this codebase to bring it up to the level
of functionality you need would be wonderful, can you do that?
thanks,
greg k-h
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-17 3:02 ` [PATCH] staging: exfat: add exfat filesystem code to Namjae Jeon
2019-09-17 4:19 ` Valdis Klētnieks
2019-09-17 4:56 ` 'Greg KH'
@ 2019-09-17 5:15 ` Gao Xiang
2 siblings, 0 replies; 24+ messages in thread
From: Gao Xiang @ 2019-09-17 5:15 UTC (permalink / raw)
To: Namjae Jeon
Cc: 'Greg KH',
alexander.levin, devel, linux-fsdevel, linux-kernel,
'Valdis Kletnieks',
sergey.senozhatsky, Namjae Jeon
Hi,
On Tue, Sep 17, 2019 at 12:02:01PM +0900, Namjae Jeon wrote:
> We are excited to see this happening and would like to state that we appreciate
> time and
> effort which people put into upstreaming exfat. Thank you!
>
> However, if possible, can we step back a little bit and re-consider it? We
> would prefer to
> see upstream the code which we are currently using in our products - sdfat - as
> this can
> be mutually benefitial from various points of view.
(Only represent my personal views)
I'd like to know the detailed commit history as an individual Android hobbyist.
I noticed sdfat years ago and there is a difference from the previous exfat driver.
I have no idea it's a good way to blindly keep the code from some opensource tar
on some website. and so many forks on github (hard to know which one is more stable,
cleaner or latest)... someone could take more time and play a role in that actively
in the community and maybe draw a roadmap of this so I could study more and maybe
contribute a little in my spare time.
And I think if it permits, development on multiple branches could be avoided...
If I am wrong, please ignore me...
Thanks,
Gao Xiang
>
> Thanks!
>
> > ---------- Forwarded message ---------
> > ????????: Ju Hyung Park <qkrwngud825@gmail.com>
> > Date: 2019?? 9?? 16?? (??) ???? 3:49
> > Subject: Re: [PATCH] staging: exfat: add exfat filesystem code to
> > To: Greg KH <gregkh@linuxfoundation.org>
> > Cc: <alexander.levin@microsoft.com>, <devel@driverdev.osuosl.org>, <linux-
> > fsdevel@vger.kernel.org>, <linux-kernel@vger.kernel.org>, Valdis Kletnieks
> > <valdis.kletnieks@vt.edu>
> >
> >
> > Hi Greg,
> >
> > On Sun, Sep 15, 2019 at 10:54 PM Greg KH <gregkh@linuxfoundation.org> wrote:
> > > Note, this just showed up publically on August 12, where were you with
> > > all of this new code before then? :)
> >
> > My sdFAT port, exfat-nofuse and the one on the staging tree, were all
> > made by Samsung.
> > And unless you guys had a chance to talk to Samsung developers
> > directly, those all share the same faith of lacking proper development
> > history.
> >
> > The source I used was from http://opensource.samsung.com, which
> > provides kernel sources as tar.gz files.
> > There is no code history available.
> >
> > > For the in-kernel code, we would have to rip out all of the work you did
> > > for all older kernels, so that's a non-starter right there.
> >
> > I'm aware.
> > I'm just letting mainline know that there is potentially another (much
> > better) base that could be upstreamed.
> >
> > If you want me to rip out older kernel support for upstreaming, I'm
> > more than happy to do so.
> >
> > > As for what codebase to work off of, I don't want to say it is too late,
> > > but really, this shows up from nowhere and we had to pick something so
> > > we found the best we could at that point in time.
> >
> > To be honest, whole public exFAT sources are all from nowhere unless
> > you had internal access to Samsung's development archive.
> > The one in the current staging tree isn't any better.
> >
> > I'm not even sure where the staging driver is from, actually.
> >
> > Samsung used the 1.2.x versioning until they switched to a new code
> > base - sdFAT.
> > The one in the staging tree is marked version 1.3.0(exfat_super.c).
> > I failed to find anything 1.3.x from Samsung's public kernel sources.
> >
> > The last time exFAT 1.2.x was used was in Galaxy S7(released in 2016).
> > Mine was originally based on sdFAT 2.1.10, used in Galaxy S10(released
> > in March 2019) and it just got updated to 2.2.0, used in Galaxy
> > Note10(released in August 2019).
> >
> > > Is there anything specific in the codebase you have now, that is lacking
> > > in the in-kernel code? Old-kernel-support doesn't count here, as we
> > > don't care about that as it is not applicable. But functionality does
> > > matter, what has been added here that we can make use of?
> >
> > This is more of a suggestion of
> > "Let's base on a *much more recent* snapshot for the community to work on",
> > since the current one on the staging tree also lacks development history.
> >
> > The diff is way too big to even start understanding the difference.
> >
> >
> > With that said though, I do have some vague but real reason as to why
> > sdFAT base is better.
> >
> > With some major Android vendors showing interests in supporting exFAT,
> > Motorola notably published their work on public Git repository with
> > full development history(the only vendor to do this that I'm aware
> > of).
> > Commits like this:
> > https://github.com/MotorolaMobilityLLC/kernel-msm/commit/7ab1657 is
> > not merged to exFAT(including the current staging tree one) while it
> > did for sdFAT.
> >
> >
> > The only thing I regret is not working on porting sdFAT sooner.
> > I definitely didn't anticipate Microsoft to suddenly lift legal issues
> > on upstreaming exFAT just around when I happen to gain interest in
> > porting sdFAT.
> >
> > If my port happened sooner, it would have been a no-brainer for it to
> > be considered as a top candidate for upstreaming.
> >
> > > And do you have any "real" development history to look at instead of the
> > > "one giant commit" of the initial code drop? That is where we could
> > > actually learn what has changed over time. Your repo as-is shows none
> > > of the interesting bits :(
> >
> > As I mentioned, development history is unobtainable, even for the
> > current staging tree or exfat-nofuse.
> > (If you guys took exfat-nofuse, you can also see that there's barely
> > any real exFAT-related development done in that tree. Everything is
> > basically fixes for newer kernel versions.)
> >
> > The best I could do, if someone's interested, is to diff all versions
> > of exFAT/sdFAT throughout the Samsung's kernel versions, but that
> > still won't give us reasons as to why the changes were made.
> >
> > TL;DR
> > My suggestion - Let's base on a much newer driver that's matured more,
> > contains more fixes, gives (slightly?) better performance and
> > hopefully has better code quality.
> >
> > Both drivers are horrible.
> > You said it yourself(for the current staging one), and even for my new
> > sdFAT-base proposal, I'm definitely not comfortable seeing this kind
> > of crap in mainline:
> > https://github.com/arter97/exfat-linux/commit/0f1ddde
> >
> > However, it's clear to me that the sdFAT base is less-horrible.
> >
> > Please let me know what you think.
> >
> > > thanks,
> > >
> > > greg kh
> >
> > Thanks.
> >
>
>
>
^ permalink raw reply [flat|nested] 24+ messages in thread
* [PATCH] staging: exfat: add exfat filesystem code to staging
@ 2019-08-28 16:08 Greg Kroah-Hartman
2019-09-14 13:39 ` [PATCH] staging: exfat: add exfat filesystem code to Park Ju Hyung
0 siblings, 1 reply; 24+ messages in thread
From: Greg Kroah-Hartman @ 2019-08-28 16:08 UTC (permalink / raw)
To: devel
Cc: linux-fsdevel, linux-kernel, Valdis Klētnieks, Sasha Levin,
Greg Kroah-Hartman
From: Valdis Klētnieks <valdis.kletnieks@vt.edu>
The exfat code needs a lot of work to get it into "real" shape for
the fs/ part of the kernel, so put it into drivers/staging/ for now so
that it can be worked on by everyone in the community.
The full specification of the filesystem can be found at:
https://docs.microsoft.com/en-us/windows/win32/fileio/exfat-specification
Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
MAINTAINERS | 5 +
drivers/staging/Kconfig | 2 +
drivers/staging/Makefile | 1 +
drivers/staging/exfat/Kconfig | 39 +
drivers/staging/exfat/Makefile | 10 +
drivers/staging/exfat/TODO | 12 +
drivers/staging/exfat/exfat.h | 973 ++++++
drivers/staging/exfat/exfat_blkdev.c | 136 +
drivers/staging/exfat/exfat_cache.c | 722 +++++
drivers/staging/exfat/exfat_core.c | 3704 +++++++++++++++++++++++
drivers/staging/exfat/exfat_nls.c | 404 +++
drivers/staging/exfat/exfat_super.c | 4137 ++++++++++++++++++++++++++
drivers/staging/exfat/exfat_upcase.c | 740 +++++
13 files changed, 10885 insertions(+)
create mode 100644 drivers/staging/exfat/Kconfig
create mode 100644 drivers/staging/exfat/Makefile
create mode 100644 drivers/staging/exfat/TODO
create mode 100644 drivers/staging/exfat/exfat.h
create mode 100644 drivers/staging/exfat/exfat_blkdev.c
create mode 100644 drivers/staging/exfat/exfat_cache.c
create mode 100644 drivers/staging/exfat/exfat_core.c
create mode 100644 drivers/staging/exfat/exfat_nls.c
create mode 100644 drivers/staging/exfat/exfat_super.c
create mode 100644 drivers/staging/exfat/exfat_upcase.c
diff --git a/MAINTAINERS b/MAINTAINERS
index e3242687cd19..a484b36e5117 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6097,6 +6097,11 @@ F: include/trace/events/mdio.h
F: include/uapi/linux/mdio.h
F: include/uapi/linux/mii.h
+EXFAT FILE SYSTEM
+M: Valdis Kletnieks <valdis.kletnieks@vt.edu>
+S: Maintained
+F: fs/exfat/
+
EXT2 FILE SYSTEM
M: Jan Kara <jack@suse.com>
L: linux-ext4@vger.kernel.org
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index d972ec8e71fb..fbdc33874780 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -118,4 +118,6 @@ source "drivers/staging/kpc2000/Kconfig"
source "drivers/staging/isdn/Kconfig"
+source "drivers/staging/exfat/Kconfig"
+
endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 6018b9a4a077..ca13f87b1e1b 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -49,3 +49,4 @@ obj-$(CONFIG_XIL_AXIS_FIFO) += axis-fifo/
obj-$(CONFIG_FIELDBUS_DEV) += fieldbus/
obj-$(CONFIG_KPC2000) += kpc2000/
obj-$(CONFIG_ISDN_CAPI) += isdn/
+obj-$(CONFIG_EXFAT_FS) += exfat/
diff --git a/drivers/staging/exfat/Kconfig b/drivers/staging/exfat/Kconfig
new file mode 100644
index 000000000000..78b32aa2ca19
--- /dev/null
+++ b/drivers/staging/exfat/Kconfig
@@ -0,0 +1,39 @@
+config EXFAT_FS
+ tristate "exFAT fs support"
+ select NLS
+ help
+ This adds support for the exFAT file system.
+
+config EXFAT_DISCARD
+ bool "enable discard support"
+ depends on EXFAT_FS
+ default y
+
+config EXFAT_DELAYED_SYNC
+ bool "enable delayed sync"
+ depends on EXFAT_FS
+ default n
+
+config EXFAT_KERNEL_DEBUG
+ bool "enable kernel debug features via ioctl"
+ depends on EXFAT_FS
+ default n
+
+config EXFAT_DEBUG_MSG
+ bool "print debug messages"
+ depends on EXFAT_FS
+ default n
+
+config EXFAT_DEFAULT_CODEPAGE
+ int "Default codepage for exFAT"
+ default 437
+ depends on EXFAT_FS
+ help
+ This option should be set to the codepage of your exFAT filesystems.
+
+config EXFAT_DEFAULT_IOCHARSET
+ string "Default iocharset for exFAT"
+ default "utf8"
+ depends on EXFAT_FS
+ help
+ Set this to the default input/output character set you'd like exFAT to use.
diff --git a/drivers/staging/exfat/Makefile b/drivers/staging/exfat/Makefile
new file mode 100644
index 000000000000..84944dfbae28
--- /dev/null
+++ b/drivers/staging/exfat/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_EXFAT_FS) += exfat.o
+
+exfat-y := exfat_core.o \
+ exfat_super.o \
+ exfat_blkdev.o \
+ exfat_cache.o \
+ exfat_nls.o \
+ exfat_upcase.o
diff --git a/drivers/staging/exfat/TODO b/drivers/staging/exfat/TODO
new file mode 100644
index 000000000000..a3eb282f9efc
--- /dev/null
+++ b/drivers/staging/exfat/TODO
@@ -0,0 +1,12 @@
+exfat_core.c - ffsReadFile - the goto err_out seem to leak a brelse().
+same for ffsWriteFile.
+
+exfat_core.c - fs_sync(sb,0) all over the place looks fishy as hell.
+There's only one place that calls it with a non-zero argument.
+
+ffsTruncateFile - if (old_size <= new_size) {
+That doesn't look right. How did it ever work? Are they relying on lazy
+block allocation when actual writes happen? If nothing else, it never
+does the 'fid->size = new_size' and do the inode update....
+
+ffsSetAttr() is just dangling in the breeze, not wired up at all...
diff --git a/drivers/staging/exfat/exfat.h b/drivers/staging/exfat/exfat.h
new file mode 100644
index 000000000000..bae180e10609
--- /dev/null
+++ b/drivers/staging/exfat/exfat.h
@@ -0,0 +1,973 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ */
+
+#ifndef _EXFAT_H
+#define _EXFAT_H
+
+#include <linux/types.h>
+#include <linux/buffer_head.h>
+
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ /* For Debugging Purpose */
+ /* IOCTL code 'f' used by
+ * - file systems typically #0~0x1F
+ * - embedded terminal devices #128~
+ * - exts for debugging purpose #99
+ * number 100 and 101 is available now but has possible conflicts
+ */
+#define EXFAT_IOC_GET_DEBUGFLAGS _IOR('f', 100, long)
+#define EXFAT_IOC_SET_DEBUGFLAGS _IOW('f', 101, long)
+
+#define EXFAT_DEBUGFLAGS_INVALID_UMOUNT 0x01
+#define EXFAT_DEBUGFLAGS_ERROR_RW 0x02
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+
+#ifdef CONFIG_EXFAT_DEBUG_MSG
+#define DEBUG 1
+#else
+#undef DEBUG
+#endif
+
+#define DENTRY_SIZE 32 /* dir entry size */
+#define DENTRY_SIZE_BITS 5
+
+/* PBR entries */
+#define PBR_SIGNATURE 0xAA55
+#define EXT_SIGNATURE 0xAA550000
+#define VOL_LABEL "NO NAME " /* size should be 11 */
+#define OEM_NAME "MSWIN4.1" /* size should be 8 */
+#define STR_FAT12 "FAT12 " /* size should be 8 */
+#define STR_FAT16 "FAT16 " /* size should be 8 */
+#define STR_FAT32 "FAT32 " /* size should be 8 */
+#define STR_EXFAT "EXFAT " /* size should be 8 */
+#define VOL_CLEAN 0x0000
+#define VOL_DIRTY 0x0002
+
+/* max number of clusters */
+#define FAT12_THRESHOLD 4087 /* 2^12 - 1 + 2 (clu 0 & 1) */
+#define FAT16_THRESHOLD 65527 /* 2^16 - 1 + 2 */
+#define FAT32_THRESHOLD 268435457 /* 2^28 - 1 + 2 */
+#define EXFAT_THRESHOLD 268435457 /* 2^28 - 1 + 2 */
+
+/* file types */
+#define TYPE_UNUSED 0x0000
+#define TYPE_DELETED 0x0001
+#define TYPE_INVALID 0x0002
+#define TYPE_CRITICAL_PRI 0x0100
+#define TYPE_BITMAP 0x0101
+#define TYPE_UPCASE 0x0102
+#define TYPE_VOLUME 0x0103
+#define TYPE_DIR 0x0104
+#define TYPE_FILE 0x011F
+#define TYPE_SYMLINK 0x015F
+#define TYPE_CRITICAL_SEC 0x0200
+#define TYPE_STREAM 0x0201
+#define TYPE_EXTEND 0x0202
+#define TYPE_ACL 0x0203
+#define TYPE_BENIGN_PRI 0x0400
+#define TYPE_GUID 0x0401
+#define TYPE_PADDING 0x0402
+#define TYPE_ACLTAB 0x0403
+#define TYPE_BENIGN_SEC 0x0800
+#define TYPE_ALL 0x0FFF
+
+/* time modes */
+#define TM_CREATE 0
+#define TM_MODIFY 1
+#define TM_ACCESS 2
+
+/* checksum types */
+#define CS_DIR_ENTRY 0
+#define CS_PBR_SECTOR 1
+#define CS_DEFAULT 2
+
+#define CLUSTER_16(x) ((u16)(x))
+#define CLUSTER_32(x) ((u32)(x))
+
+#define FALSE 0
+#define TRUE 1
+
+#define START_SECTOR(x) \
+ ((((sector_t)((x) - 2)) << p_fs->sectors_per_clu_bits) + \
+ p_fs->data_start_sector)
+
+#define IS_LAST_SECTOR_IN_CLUSTER(sec) \
+ ((((sec) - p_fs->data_start_sector + 1) & \
+ ((1 << p_fs->sectors_per_clu_bits) - 1)) == 0)
+
+#define GET_CLUSTER_FROM_SECTOR(sec) \
+ ((u32)((((sec) - p_fs->data_start_sector) >> \
+ p_fs->sectors_per_clu_bits) + 2))
+
+#define GET16(p_src) \
+ (((u16)(p_src)[0]) | (((u16)(p_src)[1]) << 8))
+#define GET32(p_src) \
+ (((u32)(p_src)[0]) | (((u32)(p_src)[1]) << 8) | \
+ (((u32)(p_src)[2]) << 16) | (((u32)(p_src)[3]) << 24))
+#define GET64(p_src) \
+ (((u64)(p_src)[0]) | (((u64)(p_src)[1]) << 8) | \
+ (((u64)(p_src)[2]) << 16) | (((u64)(p_src)[3]) << 24) | \
+ (((u64)(p_src)[4]) << 32) | (((u64)(p_src)[5]) << 40) | \
+ (((u64)(p_src)[6]) << 48) | (((u64)(p_src)[7]) << 56))
+
+#define SET16(p_dst, src) \
+ do { \
+ (p_dst)[0] = (u8)(src); \
+ (p_dst)[1] = (u8)(((u16)(src)) >> 8); \
+ } while (0)
+#define SET32(p_dst, src) \
+ do { \
+ (p_dst)[0] = (u8)(src); \
+ (p_dst)[1] = (u8)(((u32)(src)) >> 8); \
+ (p_dst)[2] = (u8)(((u32)(src)) >> 16); \
+ (p_dst)[3] = (u8)(((u32)(src)) >> 24); \
+ } while (0)
+#define SET64(p_dst, src) \
+ do { \
+ (p_dst)[0] = (u8)(src); \
+ (p_dst)[1] = (u8)(((u64)(src)) >> 8); \
+ (p_dst)[2] = (u8)(((u64)(src)) >> 16); \
+ (p_dst)[3] = (u8)(((u64)(src)) >> 24); \
+ (p_dst)[4] = (u8)(((u64)(src)) >> 32); \
+ (p_dst)[5] = (u8)(((u64)(src)) >> 40); \
+ (p_dst)[6] = (u8)(((u64)(src)) >> 48); \
+ (p_dst)[7] = (u8)(((u64)(src)) >> 56); \
+ } while (0)
+
+#ifdef __LITTLE_ENDIAN
+#define GET16_A(p_src) (*((u16 *)(p_src)))
+#define GET32_A(p_src) (*((u32 *)(p_src)))
+#define GET64_A(p_src) (*((u64 *)(p_src)))
+#define SET16_A(p_dst, src) (*((u16 *)(p_dst)) = (u16)(src))
+#define SET32_A(p_dst, src) (*((u32 *)(p_dst)) = (u32)(src))
+#define SET64_A(p_dst, src) (*((u64 *)(p_dst)) = (u64)(src))
+#else /* BIG_ENDIAN */
+#define GET16_A(p_src) GET16(p_src)
+#define GET32_A(p_src) GET32(p_src)
+#define GET64_A(p_src) GET64(p_src)
+#define SET16_A(p_dst, src) SET16(p_dst, src)
+#define SET32_A(p_dst, src) SET32(p_dst, src)
+#define SET64_A(p_dst, src) SET64(p_dst, src)
+#endif
+
+/* cache size (in number of sectors) */
+/* (should be an exponential value of 2) */
+#define FAT_CACHE_SIZE 128
+#define FAT_CACHE_HASH_SIZE 64
+#define BUF_CACHE_SIZE 256
+#define BUF_CACHE_HASH_SIZE 64
+
+/* Upcase table macro */
+#define HIGH_INDEX_BIT (8)
+#define HIGH_INDEX_MASK (0xFF00)
+#define LOW_INDEX_BIT (16-HIGH_INDEX_BIT)
+#define UTBL_ROW_COUNT (1<<LOW_INDEX_BIT)
+#define UTBL_COL_COUNT (1<<HIGH_INDEX_BIT)
+
+static inline u16 get_col_index(u16 i)
+{
+ return i >> LOW_INDEX_BIT;
+}
+static inline u16 get_row_index(u16 i)
+{
+ return i & ~HIGH_INDEX_MASK;
+}
+
+#define EXFAT_SUPER_MAGIC (0x2011BAB0L)
+#define EXFAT_ROOT_INO 1
+
+/* FAT types */
+#define FAT12 0x01 /* FAT12 */
+#define FAT16 0x0E /* Win95 FAT16 (LBA) */
+#define FAT32 0x0C /* Win95 FAT32 (LBA) */
+#define EXFAT 0x07 /* exFAT */
+
+/* file name lengths */
+#define MAX_CHARSET_SIZE 3 /* max size of multi-byte character */
+#define MAX_PATH_DEPTH 15 /* max depth of path name */
+#define MAX_NAME_LENGTH 256 /* max len of filename including NULL */
+#define MAX_PATH_LENGTH 260 /* max len of pathname including NULL */
+#define DOS_NAME_LENGTH 11 /* DOS filename length excluding NULL */
+#define DOS_PATH_LENGTH 80 /* DOS pathname length excluding NULL */
+
+/* file attributes */
+#define ATTR_NORMAL 0x0000
+#define ATTR_READONLY 0x0001
+#define ATTR_HIDDEN 0x0002
+#define ATTR_SYSTEM 0x0004
+#define ATTR_VOLUME 0x0008
+#define ATTR_SUBDIR 0x0010
+#define ATTR_ARCHIVE 0x0020
+#define ATTR_SYMLINK 0x0040
+#define ATTR_EXTEND 0x000F
+#define ATTR_RWMASK 0x007E
+
+/* file creation modes */
+#define FM_REGULAR 0x00
+#define FM_SYMLINK 0x40
+
+/* return values */
+#define FFS_SUCCESS 0
+#define FFS_MEDIAERR 1
+#define FFS_FORMATERR 2
+#define FFS_MOUNTED 3
+#define FFS_NOTMOUNTED 4
+#define FFS_ALIGNMENTERR 5
+#define FFS_SEMAPHOREERR 6
+#define FFS_INVALIDPATH 7
+#define FFS_INVALIDFID 8
+#define FFS_NOTFOUND 9
+#define FFS_FILEEXIST 10
+#define FFS_PERMISSIONERR 11
+#define FFS_NOTOPENED 12
+#define FFS_MAXOPENED 13
+#define FFS_FULL 14
+#define FFS_EOF 15
+#define FFS_DIRBUSY 16
+#define FFS_MEMORYERR 17
+#define FFS_NAMETOOLONG 18
+#define FFS_ERROR 19
+
+#define NUM_UPCASE 2918
+
+#define DOS_CUR_DIR_NAME ". "
+#define DOS_PAR_DIR_NAME ".. "
+
+#ifdef __LITTLE_ENDIAN
+#define UNI_CUR_DIR_NAME ".\0"
+#define UNI_PAR_DIR_NAME ".\0.\0"
+#else
+#define UNI_CUR_DIR_NAME "\0."
+#define UNI_PAR_DIR_NAME "\0.\0."
+#endif
+
+struct date_time_t {
+ u16 Year;
+ u16 Month;
+ u16 Day;
+ u16 Hour;
+ u16 Minute;
+ u16 Second;
+ u16 MilliSecond;
+};
+
+struct part_info_t {
+ u32 Offset; /* start sector number of the partition */
+ u32 Size; /* in sectors */
+};
+
+struct dev_info_t {
+ u32 SecSize; /* sector size in bytes */
+ u32 DevSize; /* block device size in sectors */
+};
+
+struct vol_info_t {
+ u32 FatType;
+ u32 ClusterSize;
+ u32 NumClusters;
+ u32 FreeClusters;
+ u32 UsedClusters;
+};
+
+/* directory structure */
+struct chain_t {
+ u32 dir;
+ s32 size;
+ u8 flags;
+};
+
+struct file_id_t {
+ struct chain_t dir;
+ s32 entry;
+ u32 type;
+ u32 attr;
+ u32 start_clu;
+ u64 size;
+ u8 flags;
+ s64 rwoffset;
+ s32 hint_last_off;
+ u32 hint_last_clu;
+};
+
+struct dir_entry_t {
+ char Name[MAX_NAME_LENGTH * MAX_CHARSET_SIZE];
+
+ /* used only for FAT12/16/32, not used for exFAT */
+ char ShortName[DOS_NAME_LENGTH + 2];
+
+ u32 Attr;
+ u64 Size;
+ u32 NumSubdirs;
+ struct date_time_t CreateTimestamp;
+ struct date_time_t ModifyTimestamp;
+ struct date_time_t AccessTimestamp;
+};
+
+struct timestamp_t {
+ u16 sec; /* 0 ~ 59 */
+ u16 min; /* 0 ~ 59 */
+ u16 hour; /* 0 ~ 23 */
+ u16 day; /* 1 ~ 31 */
+ u16 mon; /* 1 ~ 12 */
+ u16 year; /* 0 ~ 127 (since 1980) */
+};
+
+/* MS_DOS FAT partition boot record (512 bytes) */
+struct pbr_sector_t {
+ u8 jmp_boot[3];
+ u8 oem_name[8];
+ u8 bpb[109];
+ u8 boot_code[390];
+ u8 signature[2];
+};
+
+/* MS-DOS FAT12/16 BIOS parameter block (51 bytes) */
+struct bpb16_t {
+ u8 sector_size[2];
+ u8 sectors_per_clu;
+ u8 num_reserved[2];
+ u8 num_fats;
+ u8 num_root_entries[2];
+ u8 num_sectors[2];
+ u8 media_type;
+ u8 num_fat_sectors[2];
+ u8 sectors_in_track[2];
+ u8 num_heads[2];
+ u8 num_hid_sectors[4];
+ u8 num_huge_sectors[4];
+
+ u8 phy_drv_no;
+ u8 reserved;
+ u8 ext_signature;
+ u8 vol_serial[4];
+ u8 vol_label[11];
+ u8 vol_type[8];
+};
+
+/* MS-DOS FAT32 BIOS parameter block (79 bytes) */
+struct bpb32_t {
+ u8 sector_size[2];
+ u8 sectors_per_clu;
+ u8 num_reserved[2];
+ u8 num_fats;
+ u8 num_root_entries[2];
+ u8 num_sectors[2];
+ u8 media_type;
+ u8 num_fat_sectors[2];
+ u8 sectors_in_track[2];
+ u8 num_heads[2];
+ u8 num_hid_sectors[4];
+ u8 num_huge_sectors[4];
+ u8 num_fat32_sectors[4];
+ u8 ext_flags[2];
+ u8 fs_version[2];
+ u8 root_cluster[4];
+ u8 fsinfo_sector[2];
+ u8 backup_sector[2];
+ u8 reserved[12];
+
+ u8 phy_drv_no;
+ u8 ext_reserved;
+ u8 ext_signature;
+ u8 vol_serial[4];
+ u8 vol_label[11];
+ u8 vol_type[8];
+};
+
+/* MS-DOS EXFAT BIOS parameter block (109 bytes) */
+struct bpbex_t {
+ u8 reserved1[53];
+ u8 vol_offset[8];
+ u8 vol_length[8];
+ u8 fat_offset[4];
+ u8 fat_length[4];
+ u8 clu_offset[4];
+ u8 clu_count[4];
+ u8 root_cluster[4];
+ u8 vol_serial[4];
+ u8 fs_version[2];
+ u8 vol_flags[2];
+ u8 sector_size_bits;
+ u8 sectors_per_clu_bits;
+ u8 num_fats;
+ u8 phy_drv_no;
+ u8 perc_in_use;
+ u8 reserved2[7];
+};
+
+/* MS-DOS FAT file system information sector (512 bytes) */
+struct fsi_sector_t {
+ u8 signature1[4];
+ u8 reserved1[480];
+ u8 signature2[4];
+ u8 free_cluster[4];
+ u8 next_cluster[4];
+ u8 reserved2[14];
+ u8 signature3[2];
+};
+
+/* MS-DOS FAT directory entry (32 bytes) */
+struct dentry_t {
+ u8 dummy[32];
+};
+
+struct dos_dentry_t {
+ u8 name[DOS_NAME_LENGTH];
+ u8 attr;
+ u8 lcase;
+ u8 create_time_ms;
+ u8 create_time[2];
+ u8 create_date[2];
+ u8 access_date[2];
+ u8 start_clu_hi[2];
+ u8 modify_time[2];
+ u8 modify_date[2];
+ u8 start_clu_lo[2];
+ u8 size[4];
+};
+
+/* MS-DOS FAT extended directory entry (32 bytes) */
+struct ext_dentry_t {
+ u8 order;
+ u8 unicode_0_4[10];
+ u8 attr;
+ u8 sysid;
+ u8 checksum;
+ u8 unicode_5_10[12];
+ u8 start_clu[2];
+ u8 unicode_11_12[4];
+};
+
+/* MS-DOS EXFAT file directory entry (32 bytes) */
+struct file_dentry_t {
+ u8 type;
+ u8 num_ext;
+ u8 checksum[2];
+ u8 attr[2];
+ u8 reserved1[2];
+ u8 create_time[2];
+ u8 create_date[2];
+ u8 modify_time[2];
+ u8 modify_date[2];
+ u8 access_time[2];
+ u8 access_date[2];
+ u8 create_time_ms;
+ u8 modify_time_ms;
+ u8 access_time_ms;
+ u8 reserved2[9];
+};
+
+/* MS-DOS EXFAT stream extension directory entry (32 bytes) */
+struct strm_dentry_t {
+ u8 type;
+ u8 flags;
+ u8 reserved1;
+ u8 name_len;
+ u8 name_hash[2];
+ u8 reserved2[2];
+ u8 valid_size[8];
+ u8 reserved3[4];
+ u8 start_clu[4];
+ u8 size[8];
+};
+
+/* MS-DOS EXFAT file name directory entry (32 bytes) */
+struct name_dentry_t {
+ u8 type;
+ u8 flags;
+ u8 unicode_0_14[30];
+};
+
+/* MS-DOS EXFAT allocation bitmap directory entry (32 bytes) */
+struct bmap_dentry_t {
+ u8 type;
+ u8 flags;
+ u8 reserved[18];
+ u8 start_clu[4];
+ u8 size[8];
+};
+
+/* MS-DOS EXFAT up-case table directory entry (32 bytes) */
+struct case_dentry_t {
+ u8 type;
+ u8 reserved1[3];
+ u8 checksum[4];
+ u8 reserved2[12];
+ u8 start_clu[4];
+ u8 size[8];
+};
+
+/* MS-DOS EXFAT volume label directory entry (32 bytes) */
+struct volm_dentry_t {
+ u8 type;
+ u8 label_len;
+ u8 unicode_0_10[22];
+ u8 reserved[8];
+};
+
+/* unused entry hint information */
+struct uentry_t {
+ u32 dir;
+ s32 entry;
+ struct chain_t clu;
+};
+
+/* DOS name structure */
+struct dos_name_t {
+ u8 name[DOS_NAME_LENGTH];
+ u8 name_case;
+};
+
+/* unicode name structure */
+struct uni_name_t {
+ u16 name[MAX_NAME_LENGTH];
+ u16 name_hash;
+ u8 name_len;
+};
+
+struct buf_cache_t {
+ struct buf_cache_t *next;
+ struct buf_cache_t *prev;
+ struct buf_cache_t *hash_next;
+ struct buf_cache_t *hash_prev;
+ s32 drv;
+ sector_t sec;
+ u32 flag;
+ struct buffer_head *buf_bh;
+};
+
+struct fs_func {
+ s32 (*alloc_cluster)(struct super_block *sb, s32 num_alloc,
+ struct chain_t *p_chain);
+ void (*free_cluster)(struct super_block *sb, struct chain_t *p_chain,
+ s32 do_relse);
+ s32 (*count_used_clusters)(struct super_block *sb);
+
+ s32 (*init_dir_entry)(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, u32 type, u32 start_clu, u64 size);
+ s32 (*init_ext_entry)(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, s32 num_entries,
+ struct uni_name_t *p_uniname,
+ struct dos_name_t *p_dosname);
+ s32 (*find_dir_entry)(struct super_block *sb, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname, s32 num_entries,
+ struct dos_name_t *p_dosname, u32 type);
+ void (*delete_dir_entry)(struct super_block *sb,
+ struct chain_t *p_dir, s32 entry,
+ s32 offset, s32 num_entries);
+ void (*get_uni_name_from_ext_entry)(struct super_block *sb,
+ struct chain_t *p_dir, s32 entry,
+ u16 *uniname);
+ s32 (*count_ext_entries)(struct super_block *sb,
+ struct chain_t *p_dir, s32 entry,
+ struct dentry_t *p_entry);
+ s32 (*calc_num_entries)(struct uni_name_t *p_uniname);
+
+ u32 (*get_entry_type)(struct dentry_t *p_entry);
+ void (*set_entry_type)(struct dentry_t *p_entry, u32 type);
+ u32 (*get_entry_attr)(struct dentry_t *p_entry);
+ void (*set_entry_attr)(struct dentry_t *p_entry, u32 attr);
+ u8 (*get_entry_flag)(struct dentry_t *p_entry);
+ void (*set_entry_flag)(struct dentry_t *p_entry, u8 flag);
+ u32 (*get_entry_clu0)(struct dentry_t *p_entry);
+ void (*set_entry_clu0)(struct dentry_t *p_entry, u32 clu0);
+ u64 (*get_entry_size)(struct dentry_t *p_entry);
+ void (*set_entry_size)(struct dentry_t *p_entry, u64 size);
+ void (*get_entry_time)(struct dentry_t *p_entry,
+ struct timestamp_t *tp, u8 mode);
+ void (*set_entry_time)(struct dentry_t *p_entry,
+ struct timestamp_t *tp, u8 mode);
+};
+
+struct fs_info_t {
+ u32 drv; /* drive ID */
+ u32 vol_type; /* volume FAT type */
+ u32 vol_id; /* volume serial number */
+
+ u64 num_sectors; /* num of sectors in volume */
+ u32 num_clusters; /* num of clusters in volume */
+ u32 cluster_size; /* cluster size in bytes */
+ u32 cluster_size_bits;
+ u32 sectors_per_clu; /* cluster size in sectors */
+ u32 sectors_per_clu_bits;
+
+ u32 PBR_sector; /* PBR sector */
+ u32 FAT1_start_sector; /* FAT1 start sector */
+ u32 FAT2_start_sector; /* FAT2 start sector */
+ u32 root_start_sector; /* root dir start sector */
+ u32 data_start_sector; /* data area start sector */
+ u32 num_FAT_sectors; /* num of FAT sectors */
+
+ u32 root_dir; /* root dir cluster */
+ u32 dentries_in_root; /* num of dentries in root dir */
+ u32 dentries_per_clu; /* num of dentries per cluster */
+
+ u32 vol_flag; /* volume dirty flag */
+ struct buffer_head *pbr_bh; /* PBR sector */
+
+ u32 map_clu; /* allocation bitmap start cluster */
+ u32 map_sectors; /* num of allocation bitmap sectors */
+ struct buffer_head **vol_amap; /* allocation bitmap */
+
+ u16 **vol_utbl; /* upcase table */
+
+ u32 clu_srch_ptr; /* cluster search pointer */
+ u32 used_clusters; /* number of used clusters */
+ struct uentry_t hint_uentry; /* unused entry hint information */
+
+ u32 dev_ejected; /* block device operation error flag */
+
+ struct fs_func *fs_func;
+ struct semaphore v_sem;
+
+ /* FAT cache */
+ struct buf_cache_t FAT_cache_array[FAT_CACHE_SIZE];
+ struct buf_cache_t FAT_cache_lru_list;
+ struct buf_cache_t FAT_cache_hash_list[FAT_CACHE_HASH_SIZE];
+
+ /* buf cache */
+ struct buf_cache_t buf_cache_array[BUF_CACHE_SIZE];
+ struct buf_cache_t buf_cache_lru_list;
+ struct buf_cache_t buf_cache_hash_list[BUF_CACHE_HASH_SIZE];
+};
+
+#define ES_2_ENTRIES 2
+#define ES_3_ENTRIES 3
+#define ES_ALL_ENTRIES 0
+
+struct entry_set_cache_t {
+ /* sector number that contains file_entry */
+ sector_t sector;
+
+ /* byte offset in the sector */
+ s32 offset;
+
+ /*
+ * flag in stream entry.
+ * 01 for cluster chain,
+ * 03 for contig. clusteres.
+ */
+ s32 alloc_flag;
+
+ u32 num_entries;
+
+ /* __buf should be the last member */
+ void *__buf;
+};
+
+#define EXFAT_ERRORS_CONT 1 /* ignore error and continue */
+#define EXFAT_ERRORS_PANIC 2 /* panic on error */
+#define EXFAT_ERRORS_RO 3 /* remount r/o on error */
+
+/* ioctl command */
+#define EXFAT_IOCTL_GET_VOLUME_ID _IOR('r', 0x12, __u32)
+
+struct exfat_mount_options {
+ kuid_t fs_uid;
+ kgid_t fs_gid;
+ unsigned short fs_fmask;
+ unsigned short fs_dmask;
+
+ /* permission for setting the [am]time */
+ unsigned short allow_utime;
+
+ /* codepage for shortname conversions */
+ unsigned short codepage;
+
+ /* charset for filename input/display */
+ char *iocharset;
+
+ unsigned char casesensitive;
+
+ /* on error: continue, panic, remount-ro */
+ unsigned char errors;
+#ifdef CONFIG_EXFAT_DISCARD
+ /* flag on if -o dicard specified and device support discard() */
+ unsigned char discard;
+#endif /* CONFIG_EXFAT_DISCARD */
+};
+
+#define EXFAT_HASH_BITS 8
+#define EXFAT_HASH_SIZE (1UL << EXFAT_HASH_BITS)
+
+/*
+ * EXFAT file system in-core superblock data
+ */
+struct bd_info_t {
+ s32 sector_size; /* in bytes */
+ s32 sector_size_bits;
+ s32 sector_size_mask;
+
+ /* total number of sectors in this block device */
+ s32 num_sectors;
+
+ /* opened or not */
+ bool opened;
+};
+
+struct exfat_sb_info {
+ struct fs_info_t fs_info;
+ struct bd_info_t bd_info;
+
+ struct exfat_mount_options options;
+
+ int s_dirt;
+ struct mutex s_lock;
+ struct nls_table *nls_disk; /* Codepage used on disk */
+ struct nls_table *nls_io; /* Charset used for input and display */
+
+ struct inode *fat_inode;
+
+ spinlock_t inode_hash_lock;
+ struct hlist_head inode_hashtable[EXFAT_HASH_SIZE];
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ long debug_flags;
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+};
+
+/*
+ * EXFAT file system inode data in memory
+ */
+struct exfat_inode_info {
+ struct file_id_t fid;
+ char *target;
+ /* NOTE: mmu_private is 64bits, so must hold ->i_mutex to access */
+ loff_t mmu_private; /* physically allocated size */
+ loff_t i_pos; /* on-disk position of directory entry or 0 */
+ struct hlist_node i_hash_fat; /* hash by i_location */
+ struct rw_semaphore truncate_lock;
+ struct inode vfs_inode;
+ struct rw_semaphore i_alloc_sem; /* protect bmap against truncate */
+};
+
+#define EXFAT_SB(sb) ((struct exfat_sb_info *)((sb)->s_fs_info))
+
+static inline struct exfat_inode_info *EXFAT_I(struct inode *inode)
+{
+ return container_of(inode, struct exfat_inode_info, vfs_inode);
+}
+
+/* NLS management function */
+u16 nls_upper(struct super_block *sb, u16 a);
+int nls_dosname_cmp(struct super_block *sb, u8 *a, u8 *b);
+int nls_uniname_cmp(struct super_block *sb, u16 *a, u16 *b);
+void nls_uniname_to_dosname(struct super_block *sb,
+ struct dos_name_t *p_dosname,
+ struct uni_name_t *p_uniname, bool *p_lossy);
+void nls_dosname_to_uniname(struct super_block *sb,
+ struct uni_name_t *p_uniname,
+ struct dos_name_t *p_dosname);
+void nls_uniname_to_cstring(struct super_block *sb, u8 *p_cstring,
+ struct uni_name_t *p_uniname);
+void nls_cstring_to_uniname(struct super_block *sb,
+ struct uni_name_t *p_uniname, u8 *p_cstring,
+ bool *p_lossy);
+
+/* buffer cache management */
+void buf_init(struct super_block *sb);
+void buf_shutdown(struct super_block *sb);
+int FAT_read(struct super_block *sb, u32 loc, u32 *content);
+s32 FAT_write(struct super_block *sb, u32 loc, u32 content);
+u8 *FAT_getblk(struct super_block *sb, sector_t sec);
+void FAT_modify(struct super_block *sb, sector_t sec);
+void FAT_release_all(struct super_block *sb);
+void FAT_sync(struct super_block *sb);
+u8 *buf_getblk(struct super_block *sb, sector_t sec);
+void buf_modify(struct super_block *sb, sector_t sec);
+void buf_lock(struct super_block *sb, sector_t sec);
+void buf_unlock(struct super_block *sb, sector_t sec);
+void buf_release(struct super_block *sb, sector_t sec);
+void buf_release_all(struct super_block *sb);
+void buf_sync(struct super_block *sb);
+
+/* fs management functions */
+void fs_set_vol_flags(struct super_block *sb, u32 new_flag);
+void fs_error(struct super_block *sb);
+
+/* cluster management functions */
+s32 clear_cluster(struct super_block *sb, u32 clu);
+s32 fat_alloc_cluster(struct super_block *sb, s32 num_alloc,
+ struct chain_t *p_chain);
+s32 exfat_alloc_cluster(struct super_block *sb, s32 num_alloc,
+ struct chain_t *p_chain);
+void fat_free_cluster(struct super_block *sb, struct chain_t *p_chain,
+ s32 do_relse);
+void exfat_free_cluster(struct super_block *sb, struct chain_t *p_chain,
+ s32 do_relse);
+u32 find_last_cluster(struct super_block *sb, struct chain_t *p_chain);
+s32 count_num_clusters(struct super_block *sb, struct chain_t *dir);
+s32 fat_count_used_clusters(struct super_block *sb);
+s32 exfat_count_used_clusters(struct super_block *sb);
+void exfat_chain_cont_cluster(struct super_block *sb, u32 chain, s32 len);
+
+/* allocation bitmap management functions */
+s32 load_alloc_bitmap(struct super_block *sb);
+void free_alloc_bitmap(struct super_block *sb);
+s32 set_alloc_bitmap(struct super_block *sb, u32 clu);
+s32 clr_alloc_bitmap(struct super_block *sb, u32 clu);
+u32 test_alloc_bitmap(struct super_block *sb, u32 clu);
+void sync_alloc_bitmap(struct super_block *sb);
+
+/* upcase table management functions */
+s32 load_upcase_table(struct super_block *sb);
+void free_upcase_table(struct super_block *sb);
+
+/* dir entry management functions */
+u32 fat_get_entry_type(struct dentry_t *p_entry);
+u32 exfat_get_entry_type(struct dentry_t *p_entry);
+void fat_set_entry_type(struct dentry_t *p_entry, u32 type);
+void exfat_set_entry_type(struct dentry_t *p_entry, u32 type);
+u32 fat_get_entry_attr(struct dentry_t *p_entry);
+u32 exfat_get_entry_attr(struct dentry_t *p_entry);
+void fat_set_entry_attr(struct dentry_t *p_entry, u32 attr);
+void exfat_set_entry_attr(struct dentry_t *p_entry, u32 attr);
+u8 fat_get_entry_flag(struct dentry_t *p_entry);
+u8 exfat_get_entry_flag(struct dentry_t *p_entry);
+void fat_set_entry_flag(struct dentry_t *p_entry, u8 flag);
+void exfat_set_entry_flag(struct dentry_t *p_entry, u8 flag);
+u32 fat_get_entry_clu0(struct dentry_t *p_entry);
+u32 exfat_get_entry_clu0(struct dentry_t *p_entry);
+void fat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu);
+void exfat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu);
+u64 fat_get_entry_size(struct dentry_t *p_entry);
+u64 exfat_get_entry_size(struct dentry_t *p_entry);
+void fat_set_entry_size(struct dentry_t *p_entry, u64 size);
+void exfat_set_entry_size(struct dentry_t *p_entry, u64 size);
+struct timestamp_t *tm_current(struct timestamp_t *tm);
+void fat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
+ u8 mode);
+void exfat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
+ u8 mode);
+void fat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
+ u8 mode);
+void exfat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
+ u8 mode);
+s32 fat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry,
+ u32 type, u32 start_clu, u64 size);
+s32 exfat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, u32 type, u32 start_clu, u64 size);
+s32 fat_init_ext_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, s32 num_entries,
+ struct uni_name_t *p_uniname,
+ struct dos_name_t *p_dosname);
+s32 exfat_init_ext_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, s32 num_entries,
+ struct uni_name_t *p_uniname,
+ struct dos_name_t *p_dosname);
+void init_dos_entry(struct dos_dentry_t *ep, u32 type, u32 start_clu);
+void init_ext_entry(struct ext_dentry_t *ep, s32 order, u8 chksum,
+ u16 *uniname);
+void init_file_entry(struct file_dentry_t *ep, u32 type);
+void init_strm_entry(struct strm_dentry_t *ep, u8 flags, u32 start_clu,
+ u64 size);
+void init_name_entry(struct name_dentry_t *ep, u16 *uniname);
+void fat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, s32 order, s32 num_entries);
+void exfat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, s32 order, s32 num_entries);
+
+s32 find_location(struct super_block *sb, struct chain_t *p_dir, s32 entry,
+ sector_t *sector, s32 *offset);
+struct dentry_t *get_entry_with_sector(struct super_block *sb, sector_t sector,
+ s32 offset);
+struct dentry_t *get_entry_in_dir(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, sector_t *sector);
+struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb,
+ struct chain_t *p_dir, s32 entry,
+ u32 type,
+ struct dentry_t **file_ep);
+void release_entry_set(struct entry_set_cache_t *es);
+s32 write_whole_entry_set(struct super_block *sb, struct entry_set_cache_t *es);
+s32 write_partial_entries_in_entry_set(struct super_block *sb,
+ struct entry_set_cache_t *es,
+ struct dentry_t *ep, u32 count);
+s32 search_deleted_or_unused_entry(struct super_block *sb,
+ struct chain_t *p_dir, s32 num_entries);
+s32 find_empty_entry(struct inode *inode, struct chain_t *p_dir,
+ s32 num_entries);
+s32 fat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname, s32 num_entries,
+ struct dos_name_t *p_dosname, u32 type);
+s32 exfat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname, s32 num_entries,
+ struct dos_name_t *p_dosname, u32 type);
+s32 fat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, struct dentry_t *p_entry);
+s32 exfat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, struct dentry_t *p_entry);
+s32 count_dos_name_entries(struct super_block *sb, struct chain_t *p_dir,
+ u32 type);
+void update_dir_checksum(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry);
+void update_dir_checksum_with_entry_set(struct super_block *sb,
+ struct entry_set_cache_t *es);
+bool is_dir_empty(struct super_block *sb, struct chain_t *p_dir);
+
+/* name conversion functions */
+s32 get_num_entries_and_dos_name(struct super_block *sb, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname, s32 *entries,
+ struct dos_name_t *p_dosname);
+void get_uni_name_from_dos_entry(struct super_block *sb,
+ struct dos_dentry_t *ep,
+ struct uni_name_t *p_uniname, u8 mode);
+void fat_get_uni_name_from_ext_entry(struct super_block *sb,
+ struct chain_t *p_dir, s32 entry,
+ u16 *uniname);
+void exfat_get_uni_name_from_ext_entry(struct super_block *sb,
+ struct chain_t *p_dir, s32 entry,
+ u16 *uniname);
+s32 extract_uni_name_from_ext_entry(struct ext_dentry_t *ep,
+ u16 *uniname, s32 order);
+s32 extract_uni_name_from_name_entry(struct name_dentry_t *ep,
+ u16 *uniname, s32 order);
+s32 fat_generate_dos_name(struct super_block *sb, struct chain_t *p_dir,
+ struct dos_name_t *p_dosname);
+void fat_attach_count_to_dos_name(u8 *dosname, s32 count);
+s32 fat_calc_num_entries(struct uni_name_t *p_uniname);
+s32 exfat_calc_num_entries(struct uni_name_t *p_uniname);
+u8 calc_checksum_1byte(void *data, s32 len, u8 chksum);
+u16 calc_checksum_2byte(void *data, s32 len, u16 chksum, s32 type);
+u32 calc_checksum_4byte(void *data, s32 len, u32 chksum, s32 type);
+
+/* name resolution functions */
+s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname);
+s32 resolve_name(u8 *name, u8 **arg);
+
+/* file operation functions */
+s32 fat16_mount(struct super_block *sb, struct pbr_sector_t *p_pbr);
+s32 fat32_mount(struct super_block *sb, struct pbr_sector_t *p_pbr);
+s32 exfat_mount(struct super_block *sb, struct pbr_sector_t *p_pbr);
+s32 create_dir(struct inode *inode, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname, struct file_id_t *fid);
+s32 create_file(struct inode *inode, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname, u8 mode, struct file_id_t *fid);
+void remove_file(struct inode *inode, struct chain_t *p_dir, s32 entry);
+s32 rename_file(struct inode *inode, struct chain_t *p_dir, s32 old_entry,
+ struct uni_name_t *p_uniname, struct file_id_t *fid);
+s32 move_file(struct inode *inode, struct chain_t *p_olddir, s32 oldentry,
+ struct chain_t *p_newdir, struct uni_name_t *p_uniname,
+ struct file_id_t *fid);
+
+/* sector read/write functions */
+int sector_read(struct super_block *sb, sector_t sec,
+ struct buffer_head **bh, bool read);
+int sector_write(struct super_block *sb, sector_t sec,
+ struct buffer_head *bh, bool sync);
+int multi_sector_read(struct super_block *sb, sector_t sec,
+ struct buffer_head **bh, s32 num_secs, bool read);
+int multi_sector_write(struct super_block *sb, sector_t sec,
+ struct buffer_head *bh, s32 num_secs, bool sync);
+
+void bdev_open(struct super_block *sb);
+void bdev_close(struct super_block *sb);
+int bdev_read(struct super_block *sb, sector_t secno,
+ struct buffer_head **bh, u32 num_secs, bool read);
+int bdev_write(struct super_block *sb, sector_t secno,
+ struct buffer_head *bh, u32 num_secs, bool sync);
+int bdev_sync(struct super_block *sb);
+
+extern const u8 uni_upcase[];
+#endif /* _EXFAT_H */
diff --git a/drivers/staging/exfat/exfat_blkdev.c b/drivers/staging/exfat/exfat_blkdev.c
new file mode 100644
index 000000000000..f086c75e7076
--- /dev/null
+++ b/drivers/staging/exfat/exfat_blkdev.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ */
+
+#include <linux/blkdev.h>
+#include <linux/buffer_head.h>
+#include <linux/fs.h>
+#include "exfat.h"
+
+void bdev_open(struct super_block *sb)
+{
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ if (p_bd->opened)
+ return;
+
+ p_bd->sector_size = bdev_logical_block_size(sb->s_bdev);
+ p_bd->sector_size_bits = ilog2(p_bd->sector_size);
+ p_bd->sector_size_mask = p_bd->sector_size - 1;
+ p_bd->num_sectors = i_size_read(sb->s_bdev->bd_inode) >>
+ p_bd->sector_size_bits;
+ p_bd->opened = true;
+}
+
+void bdev_close(struct super_block *sb)
+{
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ p_bd->opened = false;
+}
+
+int bdev_read(struct super_block *sb, sector_t secno, struct buffer_head **bh,
+ u32 num_secs, bool read)
+{
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ long flags = sbi->debug_flags;
+
+ if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
+ return FFS_MEDIAERR;
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+
+ if (!p_bd->opened)
+ return FFS_MEDIAERR;
+
+ if (*bh)
+ __brelse(*bh);
+
+ if (read)
+ *bh = __bread(sb->s_bdev, secno,
+ num_secs << p_bd->sector_size_bits);
+ else
+ *bh = __getblk(sb->s_bdev, secno,
+ num_secs << p_bd->sector_size_bits);
+
+ if (*bh)
+ return 0;
+
+ WARN(!p_fs->dev_ejected,
+ "[EXFAT] No bh, device seems wrong or to be ejected.\n");
+
+ return FFS_MEDIAERR;
+}
+
+int bdev_write(struct super_block *sb, sector_t secno, struct buffer_head *bh,
+ u32 num_secs, bool sync)
+{
+ s32 count;
+ struct buffer_head *bh2;
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ long flags = sbi->debug_flags;
+
+ if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
+ return FFS_MEDIAERR;
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+
+ if (!p_bd->opened)
+ return FFS_MEDIAERR;
+
+ if (secno == bh->b_blocknr) {
+ lock_buffer(bh);
+ set_buffer_uptodate(bh);
+ mark_buffer_dirty(bh);
+ unlock_buffer(bh);
+ if (sync && (sync_dirty_buffer(bh) != 0))
+ return FFS_MEDIAERR;
+ } else {
+ count = num_secs << p_bd->sector_size_bits;
+
+ bh2 = __getblk(sb->s_bdev, secno, count);
+ if (!bh2)
+ goto no_bh;
+
+ lock_buffer(bh2);
+ memcpy(bh2->b_data, bh->b_data, count);
+ set_buffer_uptodate(bh2);
+ mark_buffer_dirty(bh2);
+ unlock_buffer(bh2);
+ if (sync && (sync_dirty_buffer(bh2) != 0)) {
+ __brelse(bh2);
+ goto no_bh;
+ }
+ __brelse(bh2);
+ }
+
+ return 0;
+
+no_bh:
+ WARN(!p_fs->dev_ejected,
+ "[EXFAT] No bh, device seems wrong or to be ejected.\n");
+
+ return FFS_MEDIAERR;
+}
+
+int bdev_sync(struct super_block *sb)
+{
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ long flags = sbi->debug_flags;
+
+ if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
+ return FFS_MEDIAERR;
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+
+ if (!p_bd->opened)
+ return FFS_MEDIAERR;
+
+ return sync_blockdev(sb->s_bdev);
+}
diff --git a/drivers/staging/exfat/exfat_cache.c b/drivers/staging/exfat/exfat_cache.c
new file mode 100644
index 000000000000..f05d692c2b1e
--- /dev/null
+++ b/drivers/staging/exfat/exfat_cache.c
@@ -0,0 +1,722 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ */
+
+#include <linux/buffer_head.h>
+#include <linux/fs.h>
+#include <linux/mutex.h>
+#include "exfat.h"
+
+#define LOCKBIT 0x01
+#define DIRTYBIT 0x02
+
+/* Local variables */
+static DEFINE_SEMAPHORE(f_sem);
+static DEFINE_SEMAPHORE(b_sem);
+
+static struct buf_cache_t *FAT_cache_find(struct super_block *sb, sector_t sec)
+{
+ s32 off;
+ struct buf_cache_t *bp, *hp;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ off = (sec +
+ (sec >> p_fs->sectors_per_clu_bits)) & (FAT_CACHE_HASH_SIZE - 1);
+
+ hp = &p_fs->FAT_cache_hash_list[off];
+ for (bp = hp->hash_next; bp != hp; bp = bp->hash_next) {
+ if ((bp->drv == p_fs->drv) && (bp->sec == sec)) {
+ WARN(!bp->buf_bh,
+ "[EXFAT] FAT_cache has no bh. It will make system panic.\n");
+
+ touch_buffer(bp->buf_bh);
+ return bp;
+ }
+ }
+ return NULL;
+}
+
+static void push_to_mru(struct buf_cache_t *bp, struct buf_cache_t *list)
+{
+ bp->next = list->next;
+ bp->prev = list;
+ list->next->prev = bp;
+ list->next = bp;
+}
+
+static void push_to_lru(struct buf_cache_t *bp, struct buf_cache_t *list)
+{
+ bp->prev = list->prev;
+ bp->next = list;
+ list->prev->next = bp;
+ list->prev = bp;
+}
+
+static void move_to_mru(struct buf_cache_t *bp, struct buf_cache_t *list)
+{
+ bp->prev->next = bp->next;
+ bp->next->prev = bp->prev;
+ push_to_mru(bp, list);
+}
+
+static void move_to_lru(struct buf_cache_t *bp, struct buf_cache_t *list)
+{
+ bp->prev->next = bp->next;
+ bp->next->prev = bp->prev;
+ push_to_lru(bp, list);
+}
+
+static struct buf_cache_t *FAT_cache_get(struct super_block *sb, sector_t sec)
+{
+ struct buf_cache_t *bp;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ bp = p_fs->FAT_cache_lru_list.prev;
+
+ move_to_mru(bp, &p_fs->FAT_cache_lru_list);
+ return bp;
+}
+
+static void FAT_cache_insert_hash(struct super_block *sb,
+ struct buf_cache_t *bp)
+{
+ s32 off;
+ struct buf_cache_t *hp;
+ struct fs_info_t *p_fs;
+
+ p_fs = &(EXFAT_SB(sb)->fs_info);
+ off = (bp->sec +
+ (bp->sec >> p_fs->sectors_per_clu_bits)) &
+ (FAT_CACHE_HASH_SIZE - 1);
+
+ hp = &p_fs->FAT_cache_hash_list[off];
+ bp->hash_next = hp->hash_next;
+ bp->hash_prev = hp;
+ hp->hash_next->hash_prev = bp;
+ hp->hash_next = bp;
+}
+
+static void FAT_cache_remove_hash(struct buf_cache_t *bp)
+{
+ (bp->hash_prev)->hash_next = bp->hash_next;
+ (bp->hash_next)->hash_prev = bp->hash_prev;
+}
+
+static void buf_cache_insert_hash(struct super_block *sb,
+ struct buf_cache_t *bp)
+{
+ s32 off;
+ struct buf_cache_t *hp;
+ struct fs_info_t *p_fs;
+
+ p_fs = &(EXFAT_SB(sb)->fs_info);
+ off = (bp->sec +
+ (bp->sec >> p_fs->sectors_per_clu_bits)) &
+ (BUF_CACHE_HASH_SIZE - 1);
+
+ hp = &p_fs->buf_cache_hash_list[off];
+ bp->hash_next = hp->hash_next;
+ bp->hash_prev = hp;
+ hp->hash_next->hash_prev = bp;
+ hp->hash_next = bp;
+}
+
+static void buf_cache_remove_hash(struct buf_cache_t *bp)
+{
+ (bp->hash_prev)->hash_next = bp->hash_next;
+ (bp->hash_next)->hash_prev = bp->hash_prev;
+}
+
+void buf_init(struct super_block *sb)
+{
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ int i;
+
+ /* LRU list */
+ p_fs->FAT_cache_lru_list.next = &p_fs->FAT_cache_lru_list;
+ p_fs->FAT_cache_lru_list.prev = &p_fs->FAT_cache_lru_list;
+
+ for (i = 0; i < FAT_CACHE_SIZE; i++) {
+ p_fs->FAT_cache_array[i].drv = -1;
+ p_fs->FAT_cache_array[i].sec = ~0;
+ p_fs->FAT_cache_array[i].flag = 0;
+ p_fs->FAT_cache_array[i].buf_bh = NULL;
+ p_fs->FAT_cache_array[i].prev = NULL;
+ p_fs->FAT_cache_array[i].next = NULL;
+ push_to_mru(&p_fs->FAT_cache_array[i],
+ &p_fs->FAT_cache_lru_list);
+ }
+
+ p_fs->buf_cache_lru_list.next = &p_fs->buf_cache_lru_list;
+ p_fs->buf_cache_lru_list.prev = &p_fs->buf_cache_lru_list;
+
+ for (i = 0; i < BUF_CACHE_SIZE; i++) {
+ p_fs->buf_cache_array[i].drv = -1;
+ p_fs->buf_cache_array[i].sec = ~0;
+ p_fs->buf_cache_array[i].flag = 0;
+ p_fs->buf_cache_array[i].buf_bh = NULL;
+ p_fs->buf_cache_array[i].prev = NULL;
+ p_fs->buf_cache_array[i].next = NULL;
+ push_to_mru(&p_fs->buf_cache_array[i],
+ &p_fs->buf_cache_lru_list);
+ }
+
+ /* HASH list */
+ for (i = 0; i < FAT_CACHE_HASH_SIZE; i++) {
+ p_fs->FAT_cache_hash_list[i].drv = -1;
+ p_fs->FAT_cache_hash_list[i].sec = ~0;
+ p_fs->FAT_cache_hash_list[i].hash_next =
+ &p_fs->FAT_cache_hash_list[i];
+ p_fs->FAT_cache_hash_list[i].hash_prev =
+ &p_fs->FAT_cache_hash_list[i];
+ }
+
+ for (i = 0; i < FAT_CACHE_SIZE; i++)
+ FAT_cache_insert_hash(sb, &p_fs->FAT_cache_array[i]);
+
+ for (i = 0; i < BUF_CACHE_HASH_SIZE; i++) {
+ p_fs->buf_cache_hash_list[i].drv = -1;
+ p_fs->buf_cache_hash_list[i].sec = ~0;
+ p_fs->buf_cache_hash_list[i].hash_next =
+ &p_fs->buf_cache_hash_list[i];
+ p_fs->buf_cache_hash_list[i].hash_prev =
+ &p_fs->buf_cache_hash_list[i];
+ }
+
+ for (i = 0; i < BUF_CACHE_SIZE; i++)
+ buf_cache_insert_hash(sb, &p_fs->buf_cache_array[i]);
+}
+
+void buf_shutdown(struct super_block *sb)
+{
+}
+
+static int __FAT_read(struct super_block *sb, u32 loc, u32 *content)
+{
+ s32 off;
+ u32 _content;
+ sector_t sec;
+ u8 *fat_sector, *fat_entry;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ if (p_fs->vol_type == FAT12) {
+ sec = p_fs->FAT1_start_sector +
+ ((loc + (loc >> 1)) >> p_bd->sector_size_bits);
+ off = (loc + (loc >> 1)) & p_bd->sector_size_mask;
+
+ if (off == (p_bd->sector_size - 1)) {
+ fat_sector = FAT_getblk(sb, sec);
+ if (!fat_sector)
+ return -1;
+
+ _content = (u32)fat_sector[off];
+
+ fat_sector = FAT_getblk(sb, ++sec);
+ if (!fat_sector)
+ return -1;
+
+ _content |= (u32)fat_sector[0] << 8;
+ } else {
+ fat_sector = FAT_getblk(sb, sec);
+ if (!fat_sector)
+ return -1;
+
+ fat_entry = &fat_sector[off];
+ _content = GET16(fat_entry);
+ }
+
+ if (loc & 1)
+ _content >>= 4;
+
+ _content &= 0x00000FFF;
+
+ if (_content >= CLUSTER_16(0x0FF8)) {
+ *content = CLUSTER_32(~0);
+ return 0;
+ }
+ *content = CLUSTER_32(_content);
+ return 0;
+ } else if (p_fs->vol_type == FAT16) {
+ sec = p_fs->FAT1_start_sector +
+ (loc >> (p_bd->sector_size_bits - 1));
+ off = (loc << 1) & p_bd->sector_size_mask;
+
+ fat_sector = FAT_getblk(sb, sec);
+ if (!fat_sector)
+ return -1;
+
+ fat_entry = &fat_sector[off];
+
+ _content = GET16_A(fat_entry);
+
+ _content &= 0x0000FFFF;
+
+ if (_content >= CLUSTER_16(0xFFF8)) {
+ *content = CLUSTER_32(~0);
+ return 0;
+ }
+ *content = CLUSTER_32(_content);
+ return 0;
+ } else if (p_fs->vol_type == FAT32) {
+ sec = p_fs->FAT1_start_sector +
+ (loc >> (p_bd->sector_size_bits - 2));
+ off = (loc << 2) & p_bd->sector_size_mask;
+
+ fat_sector = FAT_getblk(sb, sec);
+ if (!fat_sector)
+ return -1;
+
+ fat_entry = &fat_sector[off];
+
+ _content = GET32_A(fat_entry);
+
+ _content &= 0x0FFFFFFF;
+
+ if (_content >= CLUSTER_32(0x0FFFFFF8)) {
+ *content = CLUSTER_32(~0);
+ return 0;
+ }
+ *content = CLUSTER_32(_content);
+ return 0;
+ } else if (p_fs->vol_type == EXFAT) {
+ sec = p_fs->FAT1_start_sector +
+ (loc >> (p_bd->sector_size_bits - 2));
+ off = (loc << 2) & p_bd->sector_size_mask;
+
+ fat_sector = FAT_getblk(sb, sec);
+ if (!fat_sector)
+ return -1;
+
+ fat_entry = &fat_sector[off];
+ _content = GET32_A(fat_entry);
+
+ if (_content >= CLUSTER_32(0xFFFFFFF8)) {
+ *content = CLUSTER_32(~0);
+ return 0;
+ }
+ *content = CLUSTER_32(_content);
+ return 0;
+ }
+
+ /* Unknown volume type, throw in the towel and go home */
+ *content = CLUSTER_32(~0);
+ return 0;
+}
+
+/* in : sb, loc
+ * out: content
+ * returns 0 on success
+ * -1 on error
+ */
+int FAT_read(struct super_block *sb, u32 loc, u32 *content)
+{
+ s32 ret;
+
+ down(&f_sem);
+ ret = __FAT_read(sb, loc, content);
+ up(&f_sem);
+
+ return ret;
+}
+
+static s32 __FAT_write(struct super_block *sb, u32 loc, u32 content)
+{
+ s32 off;
+ sector_t sec;
+ u8 *fat_sector, *fat_entry;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ if (p_fs->vol_type == FAT12) {
+ content &= 0x00000FFF;
+
+ sec = p_fs->FAT1_start_sector +
+ ((loc + (loc >> 1)) >> p_bd->sector_size_bits);
+ off = (loc + (loc >> 1)) & p_bd->sector_size_mask;
+
+ fat_sector = FAT_getblk(sb, sec);
+ if (!fat_sector)
+ return -1;
+
+ if (loc & 1) { /* odd */
+ content <<= 4;
+
+ if (off == (p_bd->sector_size - 1)) {
+ fat_sector[off] = (u8)(content |
+ (fat_sector[off] &
+ 0x0F));
+ FAT_modify(sb, sec);
+
+ fat_sector = FAT_getblk(sb, ++sec);
+ if (!fat_sector)
+ return -1;
+
+ fat_sector[0] = (u8)(content >> 8);
+ } else {
+ fat_entry = &fat_sector[off];
+ content |= GET16(fat_entry) & 0x000F;
+
+ SET16(fat_entry, content);
+ }
+ } else { /* even */
+ fat_sector[off] = (u8)(content);
+
+ if (off == (p_bd->sector_size - 1)) {
+ fat_sector[off] = (u8)(content);
+ FAT_modify(sb, sec);
+
+ fat_sector = FAT_getblk(sb, ++sec);
+ fat_sector[0] = (u8)((fat_sector[0] & 0xF0) |
+ (content >> 8));
+ } else {
+ fat_entry = &fat_sector[off];
+ content |= GET16(fat_entry) & 0xF000;
+
+ SET16(fat_entry, content);
+ }
+ }
+ }
+
+ else if (p_fs->vol_type == FAT16) {
+ content &= 0x0000FFFF;
+
+ sec = p_fs->FAT1_start_sector + (loc >>
+ (p_bd->sector_size_bits - 1));
+ off = (loc << 1) & p_bd->sector_size_mask;
+
+ fat_sector = FAT_getblk(sb, sec);
+ if (!fat_sector)
+ return -1;
+
+ fat_entry = &fat_sector[off];
+
+ SET16_A(fat_entry, content);
+ } else if (p_fs->vol_type == FAT32) {
+ content &= 0x0FFFFFFF;
+
+ sec = p_fs->FAT1_start_sector + (loc >>
+ (p_bd->sector_size_bits - 2));
+ off = (loc << 2) & p_bd->sector_size_mask;
+
+ fat_sector = FAT_getblk(sb, sec);
+ if (!fat_sector)
+ return -1;
+
+ fat_entry = &fat_sector[off];
+
+ content |= GET32_A(fat_entry) & 0xF0000000;
+
+ SET32_A(fat_entry, content);
+ } else { /* p_fs->vol_type == EXFAT */
+ sec = p_fs->FAT1_start_sector + (loc >>
+ (p_bd->sector_size_bits - 2));
+ off = (loc << 2) & p_bd->sector_size_mask;
+
+ fat_sector = FAT_getblk(sb, sec);
+ if (!fat_sector)
+ return -1;
+
+ fat_entry = &fat_sector[off];
+
+ SET32_A(fat_entry, content);
+ }
+
+ FAT_modify(sb, sec);
+ return 0;
+}
+
+int FAT_write(struct super_block *sb, u32 loc, u32 content)
+{
+ s32 ret;
+
+ down(&f_sem);
+ ret = __FAT_write(sb, loc, content);
+ up(&f_sem);
+
+ return ret;
+}
+
+u8 *FAT_getblk(struct super_block *sb, sector_t sec)
+{
+ struct buf_cache_t *bp;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ bp = FAT_cache_find(sb, sec);
+ if (bp) {
+ move_to_mru(bp, &p_fs->FAT_cache_lru_list);
+ return bp->buf_bh->b_data;
+ }
+
+ bp = FAT_cache_get(sb, sec);
+
+ FAT_cache_remove_hash(bp);
+
+ bp->drv = p_fs->drv;
+ bp->sec = sec;
+ bp->flag = 0;
+
+ FAT_cache_insert_hash(sb, bp);
+
+ if (sector_read(sb, sec, &bp->buf_bh, 1) != FFS_SUCCESS) {
+ FAT_cache_remove_hash(bp);
+ bp->drv = -1;
+ bp->sec = ~0;
+ bp->flag = 0;
+ bp->buf_bh = NULL;
+
+ move_to_lru(bp, &p_fs->FAT_cache_lru_list);
+ return NULL;
+ }
+
+ return bp->buf_bh->b_data;
+}
+
+void FAT_modify(struct super_block *sb, sector_t sec)
+{
+ struct buf_cache_t *bp;
+
+ bp = FAT_cache_find(sb, sec);
+ if (bp)
+ sector_write(sb, sec, bp->buf_bh, 0);
+}
+
+void FAT_release_all(struct super_block *sb)
+{
+ struct buf_cache_t *bp;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ down(&f_sem);
+
+ bp = p_fs->FAT_cache_lru_list.next;
+ while (bp != &p_fs->FAT_cache_lru_list) {
+ if (bp->drv == p_fs->drv) {
+ bp->drv = -1;
+ bp->sec = ~0;
+ bp->flag = 0;
+
+ if (bp->buf_bh) {
+ __brelse(bp->buf_bh);
+ bp->buf_bh = NULL;
+ }
+ }
+ bp = bp->next;
+ }
+
+ up(&f_sem);
+}
+
+void FAT_sync(struct super_block *sb)
+{
+ struct buf_cache_t *bp;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ down(&f_sem);
+
+ bp = p_fs->FAT_cache_lru_list.next;
+ while (bp != &p_fs->FAT_cache_lru_list) {
+ if ((bp->drv == p_fs->drv) && (bp->flag & DIRTYBIT)) {
+ sync_dirty_buffer(bp->buf_bh);
+ bp->flag &= ~(DIRTYBIT);
+ }
+ bp = bp->next;
+ }
+
+ up(&f_sem);
+}
+
+static struct buf_cache_t *buf_cache_find(struct super_block *sb, sector_t sec)
+{
+ s32 off;
+ struct buf_cache_t *bp, *hp;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ off = (sec + (sec >> p_fs->sectors_per_clu_bits)) &
+ (BUF_CACHE_HASH_SIZE - 1);
+
+ hp = &p_fs->buf_cache_hash_list[off];
+ for (bp = hp->hash_next; bp != hp; bp = bp->hash_next) {
+ if ((bp->drv == p_fs->drv) && (bp->sec == sec)) {
+ touch_buffer(bp->buf_bh);
+ return bp;
+ }
+ }
+ return NULL;
+}
+
+static struct buf_cache_t *buf_cache_get(struct super_block *sb, sector_t sec)
+{
+ struct buf_cache_t *bp;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ bp = p_fs->buf_cache_lru_list.prev;
+ while (bp->flag & LOCKBIT)
+ bp = bp->prev;
+
+ move_to_mru(bp, &p_fs->buf_cache_lru_list);
+ return bp;
+}
+
+static u8 *__buf_getblk(struct super_block *sb, sector_t sec)
+{
+ struct buf_cache_t *bp;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ bp = buf_cache_find(sb, sec);
+ if (bp) {
+ move_to_mru(bp, &p_fs->buf_cache_lru_list);
+ return bp->buf_bh->b_data;
+ }
+
+ bp = buf_cache_get(sb, sec);
+
+ buf_cache_remove_hash(bp);
+
+ bp->drv = p_fs->drv;
+ bp->sec = sec;
+ bp->flag = 0;
+
+ buf_cache_insert_hash(sb, bp);
+
+ if (sector_read(sb, sec, &bp->buf_bh, 1) != FFS_SUCCESS) {
+ buf_cache_remove_hash(bp);
+ bp->drv = -1;
+ bp->sec = ~0;
+ bp->flag = 0;
+ bp->buf_bh = NULL;
+
+ move_to_lru(bp, &p_fs->buf_cache_lru_list);
+ return NULL;
+ }
+
+ return bp->buf_bh->b_data;
+}
+
+u8 *buf_getblk(struct super_block *sb, sector_t sec)
+{
+ u8 *buf;
+
+ down(&b_sem);
+ buf = __buf_getblk(sb, sec);
+ up(&b_sem);
+
+ return buf;
+}
+
+void buf_modify(struct super_block *sb, sector_t sec)
+{
+ struct buf_cache_t *bp;
+
+ down(&b_sem);
+
+ bp = buf_cache_find(sb, sec);
+ if (likely(bp))
+ sector_write(sb, sec, bp->buf_bh, 0);
+
+ WARN(!bp, "[EXFAT] failed to find buffer_cache(sector:%llu).\n",
+ (unsigned long long)sec);
+
+ up(&b_sem);
+}
+
+void buf_lock(struct super_block *sb, sector_t sec)
+{
+ struct buf_cache_t *bp;
+
+ down(&b_sem);
+
+ bp = buf_cache_find(sb, sec);
+ if (likely(bp))
+ bp->flag |= LOCKBIT;
+
+ WARN(!bp, "[EXFAT] failed to find buffer_cache(sector:%llu).\n",
+ (unsigned long long)sec);
+
+ up(&b_sem);
+}
+
+void buf_unlock(struct super_block *sb, sector_t sec)
+{
+ struct buf_cache_t *bp;
+
+ down(&b_sem);
+
+ bp = buf_cache_find(sb, sec);
+ if (likely(bp))
+ bp->flag &= ~(LOCKBIT);
+
+ WARN(!bp, "[EXFAT] failed to find buffer_cache(sector:%llu).\n",
+ (unsigned long long)sec);
+
+ up(&b_sem);
+}
+
+void buf_release(struct super_block *sb, sector_t sec)
+{
+ struct buf_cache_t *bp;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ down(&b_sem);
+
+ bp = buf_cache_find(sb, sec);
+ if (likely(bp)) {
+ bp->drv = -1;
+ bp->sec = ~0;
+ bp->flag = 0;
+
+ if (bp->buf_bh) {
+ __brelse(bp->buf_bh);
+ bp->buf_bh = NULL;
+ }
+
+ move_to_lru(bp, &p_fs->buf_cache_lru_list);
+ }
+
+ up(&b_sem);
+}
+
+void buf_release_all(struct super_block *sb)
+{
+ struct buf_cache_t *bp;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ down(&b_sem);
+
+ bp = p_fs->buf_cache_lru_list.next;
+ while (bp != &p_fs->buf_cache_lru_list) {
+ if (bp->drv == p_fs->drv) {
+ bp->drv = -1;
+ bp->sec = ~0;
+ bp->flag = 0;
+
+ if (bp->buf_bh) {
+ __brelse(bp->buf_bh);
+ bp->buf_bh = NULL;
+ }
+ }
+ bp = bp->next;
+ }
+
+ up(&b_sem);
+}
+
+void buf_sync(struct super_block *sb)
+{
+ struct buf_cache_t *bp;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ down(&b_sem);
+
+ bp = p_fs->buf_cache_lru_list.next;
+ while (bp != &p_fs->buf_cache_lru_list) {
+ if ((bp->drv == p_fs->drv) && (bp->flag & DIRTYBIT)) {
+ sync_dirty_buffer(bp->buf_bh);
+ bp->flag &= ~(DIRTYBIT);
+ }
+ bp = bp->next;
+ }
+
+ up(&b_sem);
+}
diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
new file mode 100644
index 000000000000..9f76ca175c80
--- /dev/null
+++ b/drivers/staging/exfat/exfat_core.c
@@ -0,0 +1,3704 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ */
+
+#include <linux/types.h>
+#include <linux/buffer_head.h>
+#include <linux/fs.h>
+#include <linux/mutex.h>
+#include <linux/blkdev.h>
+#include <linux/slab.h>
+#include "exfat.h"
+
+
+static void __set_sb_dirty(struct super_block *sb)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+
+ sbi->s_dirt = 1;
+}
+
+static u8 name_buf[MAX_PATH_LENGTH * MAX_CHARSET_SIZE];
+
+static char *reserved_names[] = {
+ "AUX ", "CON ", "NUL ", "PRN ",
+ "COM1 ", "COM2 ", "COM3 ", "COM4 ",
+ "COM5 ", "COM6 ", "COM7 ", "COM8 ", "COM9 ",
+ "LPT1 ", "LPT2 ", "LPT3 ", "LPT4 ",
+ "LPT5 ", "LPT6 ", "LPT7 ", "LPT8 ", "LPT9 ",
+ NULL
+};
+
+static u8 free_bit[] = {
+ 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, /* 0 ~ 19 */
+ 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, 0, 1, 0, 2, 0, 1, 0, 3, /* 20 ~ 39 */
+ 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, /* 40 ~ 59 */
+ 0, 1, 0, 6, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, /* 60 ~ 79 */
+ 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, 0, 1, 0, 2, /* 80 ~ 99 */
+ 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, /* 100 ~ 119 */
+ 0, 1, 0, 2, 0, 1, 0, 7, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, /* 120 ~ 139 */
+ 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, /* 140 ~ 159 */
+ 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, /* 160 ~ 179 */
+ 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 6, 0, 1, 0, 2, 0, 1, 0, 3, /* 180 ~ 199 */
+ 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, /* 200 ~ 219 */
+ 0, 1, 0, 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, /* 220 ~ 239 */
+ 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0 /* 240 ~ 254 */
+};
+
+static u8 used_bit[] = {
+ 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3, /* 0 ~ 19 */
+ 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 3, 2, 3, 3, 4, /* 20 ~ 39 */
+ 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, /* 40 ~ 59 */
+ 4, 5, 5, 6, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, /* 60 ~ 79 */
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4, /* 80 ~ 99 */
+ 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, /* 100 ~ 119 */
+ 4, 5, 5, 6, 5, 6, 6, 7, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, /* 120 ~ 139 */
+ 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, /* 140 ~ 159 */
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, /* 160 ~ 179 */
+ 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 2, 3, 3, 4, 3, 4, 4, 5, /* 180 ~ 199 */
+ 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, /* 200 ~ 219 */
+ 5, 6, 6, 7, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, /* 220 ~ 239 */
+ 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 /* 240 ~ 255 */
+};
+
+#define BITMAP_LOC(v) ((v) >> 3)
+#define BITMAP_SHIFT(v) ((v) & 0x07)
+
+static inline s32 exfat_bitmap_test(u8 *bitmap, int i)
+{
+ u8 data;
+
+ data = bitmap[BITMAP_LOC(i)];
+ if ((data >> BITMAP_SHIFT(i)) & 0x01)
+ return 1;
+ return 0;
+}
+
+static inline void exfat_bitmap_set(u8 *bitmap, int i)
+{
+ bitmap[BITMAP_LOC(i)] |= (0x01 << BITMAP_SHIFT(i));
+}
+
+static inline void exfat_bitmap_clear(u8 *bitmap, int i)
+{
+ bitmap[BITMAP_LOC(i)] &= ~(0x01 << BITMAP_SHIFT(i));
+}
+
+/*
+ * File System Management Functions
+ */
+
+void fs_set_vol_flags(struct super_block *sb, u32 new_flag)
+{
+ struct pbr_sector_t *p_pbr;
+ struct bpbex_t *p_bpb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if (p_fs->vol_flag == new_flag)
+ return;
+
+ p_fs->vol_flag = new_flag;
+
+ if (p_fs->vol_type == EXFAT) {
+ if (p_fs->pbr_bh == NULL) {
+ if (sector_read(sb, p_fs->PBR_sector,
+ &p_fs->pbr_bh, 1) != FFS_SUCCESS)
+ return;
+ }
+
+ p_pbr = (struct pbr_sector_t *)p_fs->pbr_bh->b_data;
+ p_bpb = (struct bpbex_t *)p_pbr->bpb;
+ SET16(p_bpb->vol_flags, (u16)new_flag);
+
+ /* XXX duyoung
+ * what can we do here? (cuz fs_set_vol_flags() is void)
+ */
+ if ((new_flag == VOL_DIRTY) && (!buffer_dirty(p_fs->pbr_bh)))
+ sector_write(sb, p_fs->PBR_sector, p_fs->pbr_bh, 1);
+ else
+ sector_write(sb, p_fs->PBR_sector, p_fs->pbr_bh, 0);
+ }
+}
+
+void fs_error(struct super_block *sb)
+{
+ struct exfat_mount_options *opts = &EXFAT_SB(sb)->options;
+
+ if (opts->errors == EXFAT_ERRORS_PANIC) {
+ panic("[EXFAT] Filesystem panic from previous error\n");
+ } else if ((opts->errors == EXFAT_ERRORS_RO) && !sb_rdonly(sb)) {
+ sb->s_flags |= SB_RDONLY;
+ pr_err("[EXFAT] Filesystem has been set read-only\n");
+ }
+}
+
+/*
+ * Cluster Management Functions
+ */
+
+s32 clear_cluster(struct super_block *sb, u32 clu)
+{
+ sector_t s, n;
+ s32 ret = FFS_SUCCESS;
+ struct buffer_head *tmp_bh = NULL;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ if (clu == CLUSTER_32(0)) { /* FAT16 root_dir */
+ s = p_fs->root_start_sector;
+ n = p_fs->data_start_sector;
+ } else {
+ s = START_SECTOR(clu);
+ n = s + p_fs->sectors_per_clu;
+ }
+
+ for (; s < n; s++) {
+ ret = sector_read(sb, s, &tmp_bh, 0);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ memset((char *)tmp_bh->b_data, 0x0, p_bd->sector_size);
+ ret = sector_write(sb, s, tmp_bh, 0);
+ if (ret != FFS_SUCCESS)
+ break;
+ }
+
+ brelse(tmp_bh);
+ return ret;
+}
+
+s32 fat_alloc_cluster(struct super_block *sb, s32 num_alloc,
+ struct chain_t *p_chain)
+{
+ int i, num_clusters = 0;
+ u32 new_clu, last_clu = CLUSTER_32(~0), read_clu;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ new_clu = p_chain->dir;
+ if (new_clu == CLUSTER_32(~0))
+ new_clu = p_fs->clu_srch_ptr;
+ else if (new_clu >= p_fs->num_clusters)
+ new_clu = 2;
+
+ __set_sb_dirty(sb);
+
+ p_chain->dir = CLUSTER_32(~0);
+
+ for (i = 2; i < p_fs->num_clusters; i++) {
+ if (FAT_read(sb, new_clu, &read_clu) != 0)
+ return -1;
+
+ if (read_clu == CLUSTER_32(0)) {
+ if (FAT_write(sb, new_clu, CLUSTER_32(~0)) < 0)
+ return -1;
+ num_clusters++;
+
+ if (p_chain->dir == CLUSTER_32(~0)) {
+ p_chain->dir = new_clu;
+ } else {
+ if (FAT_write(sb, last_clu, new_clu) < 0)
+ return -1;
+ }
+
+ last_clu = new_clu;
+
+ if ((--num_alloc) == 0) {
+ p_fs->clu_srch_ptr = new_clu;
+ if (p_fs->used_clusters != (u32) ~0)
+ p_fs->used_clusters += num_clusters;
+
+ return num_clusters;
+ }
+ }
+ if ((++new_clu) >= p_fs->num_clusters)
+ new_clu = 2;
+ }
+
+ p_fs->clu_srch_ptr = new_clu;
+ if (p_fs->used_clusters != (u32) ~0)
+ p_fs->used_clusters += num_clusters;
+
+ return num_clusters;
+}
+
+s32 exfat_alloc_cluster(struct super_block *sb, s32 num_alloc,
+ struct chain_t *p_chain)
+{
+ s32 num_clusters = 0;
+ u32 hint_clu, new_clu, last_clu = CLUSTER_32(~0);
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ hint_clu = p_chain->dir;
+ if (hint_clu == CLUSTER_32(~0)) {
+ hint_clu = test_alloc_bitmap(sb, p_fs->clu_srch_ptr-2);
+ if (hint_clu == CLUSTER_32(~0))
+ return 0;
+ } else if (hint_clu >= p_fs->num_clusters) {
+ hint_clu = 2;
+ p_chain->flags = 0x01;
+ }
+
+ __set_sb_dirty(sb);
+
+ p_chain->dir = CLUSTER_32(~0);
+
+ while ((new_clu = test_alloc_bitmap(sb, hint_clu-2)) != CLUSTER_32(~0)) {
+ if (new_clu != hint_clu) {
+ if (p_chain->flags == 0x03) {
+ exfat_chain_cont_cluster(sb, p_chain->dir,
+ num_clusters);
+ p_chain->flags = 0x01;
+ }
+ }
+
+ if (set_alloc_bitmap(sb, new_clu-2) != FFS_SUCCESS)
+ return -1;
+
+ num_clusters++;
+
+ if (p_chain->flags == 0x01) {
+ if (FAT_write(sb, new_clu, CLUSTER_32(~0)) < 0)
+ return -1;
+ }
+
+ if (p_chain->dir == CLUSTER_32(~0)) {
+ p_chain->dir = new_clu;
+ } else {
+ if (p_chain->flags == 0x01) {
+ if (FAT_write(sb, last_clu, new_clu) < 0)
+ return -1;
+ }
+ }
+ last_clu = new_clu;
+
+ if ((--num_alloc) == 0) {
+ p_fs->clu_srch_ptr = hint_clu;
+ if (p_fs->used_clusters != (u32) ~0)
+ p_fs->used_clusters += num_clusters;
+
+ p_chain->size += num_clusters;
+ return num_clusters;
+ }
+
+ hint_clu = new_clu + 1;
+ if (hint_clu >= p_fs->num_clusters) {
+ hint_clu = 2;
+
+ if (p_chain->flags == 0x03) {
+ exfat_chain_cont_cluster(sb, p_chain->dir,
+ num_clusters);
+ p_chain->flags = 0x01;
+ }
+ }
+ }
+
+ p_fs->clu_srch_ptr = hint_clu;
+ if (p_fs->used_clusters != (u32) ~0)
+ p_fs->used_clusters += num_clusters;
+
+ p_chain->size += num_clusters;
+ return num_clusters;
+}
+
+void fat_free_cluster(struct super_block *sb, struct chain_t *p_chain,
+ s32 do_relse)
+{
+ s32 num_clusters = 0;
+ u32 clu, prev;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ int i;
+ sector_t sector;
+
+ if ((p_chain->dir == CLUSTER_32(0)) || (p_chain->dir == CLUSTER_32(~0)))
+ return;
+ __set_sb_dirty(sb);
+ clu = p_chain->dir;
+
+ if (p_chain->size <= 0)
+ return;
+
+ do {
+ if (p_fs->dev_ejected)
+ break;
+
+ if (do_relse) {
+ sector = START_SECTOR(clu);
+ for (i = 0; i < p_fs->sectors_per_clu; i++)
+ buf_release(sb, sector+i);
+ }
+
+ prev = clu;
+ if (FAT_read(sb, clu, &clu) == -1)
+ break;
+
+ if (FAT_write(sb, prev, CLUSTER_32(0)) < 0)
+ break;
+ num_clusters++;
+
+ } while (clu != CLUSTER_32(~0));
+
+ if (p_fs->used_clusters != (u32) ~0)
+ p_fs->used_clusters -= num_clusters;
+}
+
+void exfat_free_cluster(struct super_block *sb, struct chain_t *p_chain,
+ s32 do_relse)
+{
+ s32 num_clusters = 0;
+ u32 clu;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ int i;
+ sector_t sector;
+
+ if ((p_chain->dir == CLUSTER_32(0)) || (p_chain->dir == CLUSTER_32(~0)))
+ return;
+
+ if (p_chain->size <= 0) {
+ pr_err("[EXFAT] free_cluster : skip free-req clu:%u, because of zero-size truncation\n",
+ p_chain->dir);
+ return;
+ }
+
+ __set_sb_dirty(sb);
+ clu = p_chain->dir;
+
+ if (p_chain->flags == 0x03) {
+ do {
+ if (do_relse) {
+ sector = START_SECTOR(clu);
+ for (i = 0; i < p_fs->sectors_per_clu; i++)
+ buf_release(sb, sector+i);
+ }
+
+ if (clr_alloc_bitmap(sb, clu-2) != FFS_SUCCESS)
+ break;
+ clu++;
+
+ num_clusters++;
+ } while (num_clusters < p_chain->size);
+ } else {
+ do {
+ if (p_fs->dev_ejected)
+ break;
+
+ if (do_relse) {
+ sector = START_SECTOR(clu);
+ for (i = 0; i < p_fs->sectors_per_clu; i++)
+ buf_release(sb, sector+i);
+ }
+
+ if (clr_alloc_bitmap(sb, clu-2) != FFS_SUCCESS)
+ break;
+
+ if (FAT_read(sb, clu, &clu) == -1)
+ break;
+ num_clusters++;
+ } while ((clu != CLUSTER_32(0)) && (clu != CLUSTER_32(~0)));
+ }
+
+ if (p_fs->used_clusters != (u32) ~0)
+ p_fs->used_clusters -= num_clusters;
+}
+
+u32 find_last_cluster(struct super_block *sb, struct chain_t *p_chain)
+{
+ u32 clu, next;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ clu = p_chain->dir;
+
+ if (p_chain->flags == 0x03) {
+ clu += p_chain->size - 1;
+ } else {
+ while ((FAT_read(sb, clu, &next) == 0) &&
+ (next != CLUSTER_32(~0))) {
+ if (p_fs->dev_ejected)
+ break;
+ clu = next;
+ }
+ }
+
+ return clu;
+}
+
+s32 count_num_clusters(struct super_block *sb, struct chain_t *p_chain)
+{
+ int i, count = 0;
+ u32 clu;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if ((p_chain->dir == CLUSTER_32(0)) || (p_chain->dir == CLUSTER_32(~0)))
+ return 0;
+
+ clu = p_chain->dir;
+
+ if (p_chain->flags == 0x03) {
+ count = p_chain->size;
+ } else {
+ for (i = 2; i < p_fs->num_clusters; i++) {
+ count++;
+ if (FAT_read(sb, clu, &clu) != 0)
+ return 0;
+ if (clu == CLUSTER_32(~0))
+ break;
+ }
+ }
+
+ return count;
+}
+
+s32 fat_count_used_clusters(struct super_block *sb)
+{
+ int i, count = 0;
+ u32 clu;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ for (i = 2; i < p_fs->num_clusters; i++) {
+ if (FAT_read(sb, i, &clu) != 0)
+ break;
+ if (clu != CLUSTER_32(0))
+ count++;
+ }
+
+ return count;
+}
+
+s32 exfat_count_used_clusters(struct super_block *sb)
+{
+ int i, map_i, map_b, count = 0;
+ u8 k;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ map_i = map_b = 0;
+
+ for (i = 2; i < p_fs->num_clusters; i += 8) {
+ k = *(((u8 *) p_fs->vol_amap[map_i]->b_data) + map_b);
+ count += used_bit[k];
+
+ if ((++map_b) >= p_bd->sector_size) {
+ map_i++;
+ map_b = 0;
+ }
+ }
+
+ return count;
+}
+
+void exfat_chain_cont_cluster(struct super_block *sb, u32 chain, s32 len)
+{
+ if (len == 0)
+ return;
+
+ while (len > 1) {
+ if (FAT_write(sb, chain, chain+1) < 0)
+ break;
+ chain++;
+ len--;
+ }
+ FAT_write(sb, chain, CLUSTER_32(~0));
+}
+
+/*
+ * Allocation Bitmap Management Functions
+ */
+
+s32 load_alloc_bitmap(struct super_block *sb)
+{
+ int i, j, ret;
+ u32 map_size;
+ u32 type;
+ sector_t sector;
+ struct chain_t clu;
+ struct bmap_dentry_t *ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ clu.dir = p_fs->root_dir;
+ clu.flags = 0x01;
+
+ while (clu.dir != CLUSTER_32(~0)) {
+ if (p_fs->dev_ejected)
+ break;
+
+ for (i = 0; i < p_fs->dentries_per_clu; i++) {
+ ep = (struct bmap_dentry_t *)get_entry_in_dir(sb, &clu,
+ i, NULL);
+ if (!ep)
+ return FFS_MEDIAERR;
+
+ type = p_fs->fs_func->get_entry_type((struct dentry_t *)ep);
+
+ if (type == TYPE_UNUSED)
+ break;
+ if (type != TYPE_BITMAP)
+ continue;
+
+ if (ep->flags == 0x0) {
+ p_fs->map_clu = GET32_A(ep->start_clu);
+ map_size = (u32) GET64_A(ep->size);
+
+ p_fs->map_sectors = ((map_size-1) >> p_bd->sector_size_bits) + 1;
+
+ p_fs->vol_amap = kmalloc_array(p_fs->map_sectors,
+ sizeof(struct buffer_head *),
+ GFP_KERNEL);
+ if (p_fs->vol_amap == NULL)
+ return FFS_MEMORYERR;
+
+ sector = START_SECTOR(p_fs->map_clu);
+
+ for (j = 0; j < p_fs->map_sectors; j++) {
+ p_fs->vol_amap[j] = NULL;
+ ret = sector_read(sb, sector+j, &(p_fs->vol_amap[j]), 1);
+ if (ret != FFS_SUCCESS) {
+ /* release all buffers and free vol_amap */
+ i = 0;
+ while (i < j)
+ brelse(p_fs->vol_amap[i++]);
+
+ kfree(p_fs->vol_amap);
+ p_fs->vol_amap = NULL;
+ return ret;
+ }
+ }
+
+ p_fs->pbr_bh = NULL;
+ return FFS_SUCCESS;
+ }
+ }
+
+ if (FAT_read(sb, clu.dir, &clu.dir) != 0)
+ return FFS_MEDIAERR;
+ }
+
+ return FFS_FORMATERR;
+}
+
+void free_alloc_bitmap(struct super_block *sb)
+{
+ int i;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ brelse(p_fs->pbr_bh);
+
+ for (i = 0; i < p_fs->map_sectors; i++)
+ __brelse(p_fs->vol_amap[i]);
+
+ kfree(p_fs->vol_amap);
+ p_fs->vol_amap = NULL;
+}
+
+s32 set_alloc_bitmap(struct super_block *sb, u32 clu)
+{
+ int i, b;
+ sector_t sector;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ i = clu >> (p_bd->sector_size_bits + 3);
+ b = clu & ((p_bd->sector_size << 3) - 1);
+
+ sector = START_SECTOR(p_fs->map_clu) + i;
+
+ exfat_bitmap_set((u8 *) p_fs->vol_amap[i]->b_data, b);
+
+ return sector_write(sb, sector, p_fs->vol_amap[i], 0);
+}
+
+s32 clr_alloc_bitmap(struct super_block *sb, u32 clu)
+{
+ int i, b;
+ sector_t sector;
+#ifdef CONFIG_EXFAT_DISCARD
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct exfat_mount_options *opts = &sbi->options;
+ int ret;
+#endif /* CONFIG_EXFAT_DISCARD */
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ i = clu >> (p_bd->sector_size_bits + 3);
+ b = clu & ((p_bd->sector_size << 3) - 1);
+
+ sector = START_SECTOR(p_fs->map_clu) + i;
+
+ exfat_bitmap_clear((u8 *) p_fs->vol_amap[i]->b_data, b);
+
+ return sector_write(sb, sector, p_fs->vol_amap[i], 0);
+
+#ifdef CONFIG_EXFAT_DISCARD
+ if (opts->discard) {
+ ret = sb_issue_discard(sb, START_SECTOR(clu),
+ (1 << p_fs->sectors_per_clu_bits),
+ GFP_NOFS, 0);
+ if (ret == -EOPNOTSUPP) {
+ pr_warn("discard not supported by device, disabling");
+ opts->discard = 0;
+ }
+ }
+#endif /* CONFIG_EXFAT_DISCARD */
+}
+
+u32 test_alloc_bitmap(struct super_block *sb, u32 clu)
+{
+ int i, map_i, map_b;
+ u32 clu_base, clu_free;
+ u8 k, clu_mask;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ clu_base = (clu & ~(0x7)) + 2;
+ clu_mask = (1 << (clu - clu_base + 2)) - 1;
+
+ map_i = clu >> (p_bd->sector_size_bits + 3);
+ map_b = (clu >> 3) & p_bd->sector_size_mask;
+
+ for (i = 2; i < p_fs->num_clusters; i += 8) {
+ k = *(((u8 *) p_fs->vol_amap[map_i]->b_data) + map_b);
+ if (clu_mask > 0) {
+ k |= clu_mask;
+ clu_mask = 0;
+ }
+ if (k < 0xFF) {
+ clu_free = clu_base + free_bit[k];
+ if (clu_free < p_fs->num_clusters)
+ return clu_free;
+ }
+ clu_base += 8;
+
+ if (((++map_b) >= p_bd->sector_size) ||
+ (clu_base >= p_fs->num_clusters)) {
+ if ((++map_i) >= p_fs->map_sectors) {
+ clu_base = 2;
+ map_i = 0;
+ }
+ map_b = 0;
+ }
+ }
+
+ return CLUSTER_32(~0);
+}
+
+void sync_alloc_bitmap(struct super_block *sb)
+{
+ int i;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if (p_fs->vol_amap == NULL)
+ return;
+
+ for (i = 0; i < p_fs->map_sectors; i++)
+ sync_dirty_buffer(p_fs->vol_amap[i]);
+}
+
+/*
+ * Upcase table Management Functions
+ */
+static s32 __load_upcase_table(struct super_block *sb, sector_t sector,
+ u32 num_sectors, u32 utbl_checksum)
+{
+ int i, ret = FFS_ERROR;
+ u32 j;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+ struct buffer_head *tmp_bh = NULL;
+ sector_t end_sector = num_sectors + sector;
+
+ u8 skip = FALSE;
+ u32 index = 0;
+ u16 uni = 0;
+ u16 **upcase_table;
+
+ u32 checksum = 0;
+
+ upcase_table = p_fs->vol_utbl = kmalloc(UTBL_COL_COUNT * sizeof(u16 *),
+ GFP_KERNEL);
+ if (upcase_table == NULL)
+ return FFS_MEMORYERR;
+ memset(upcase_table, 0, UTBL_COL_COUNT * sizeof(u16 *));
+
+ while (sector < end_sector) {
+ ret = sector_read(sb, sector, &tmp_bh, 1);
+ if (ret != FFS_SUCCESS) {
+ pr_debug("sector read (0x%llX)fail\n",
+ (unsigned long long)sector);
+ goto error;
+ }
+ sector++;
+
+ for (i = 0; i < p_bd->sector_size && index <= 0xFFFF; i += 2) {
+ uni = GET16(((u8 *) tmp_bh->b_data)+i);
+
+ checksum = ((checksum & 1) ? 0x80000000 : 0) +
+ (checksum >> 1) + *(((u8 *)tmp_bh->b_data) +
+ i);
+ checksum = ((checksum & 1) ? 0x80000000 : 0) +
+ (checksum >> 1) + *(((u8 *)tmp_bh->b_data) +
+ (i + 1));
+
+ if (skip) {
+ pr_debug("skip from 0x%X ", index);
+ index += uni;
+ pr_debug("to 0x%X (amount of 0x%X)\n",
+ index, uni);
+ skip = FALSE;
+ } else if (uni == index)
+ index++;
+ else if (uni == 0xFFFF)
+ skip = TRUE;
+ else { /* uni != index , uni != 0xFFFF */
+ u16 col_index = get_col_index(index);
+
+ if (upcase_table[col_index] == NULL) {
+ pr_debug("alloc = 0x%X\n", col_index);
+ upcase_table[col_index] = kmalloc_array(UTBL_ROW_COUNT,
+ sizeof(u16), GFP_KERNEL);
+ if (upcase_table[col_index] == NULL) {
+ ret = FFS_MEMORYERR;
+ goto error;
+ }
+
+ for (j = 0; j < UTBL_ROW_COUNT; j++)
+ upcase_table[col_index][j] = (col_index << LOW_INDEX_BIT) | j;
+ }
+
+ upcase_table[col_index][get_row_index(index)] = uni;
+ index++;
+ }
+ }
+ }
+ if (index >= 0xFFFF && utbl_checksum == checksum) {
+ if (tmp_bh)
+ brelse(tmp_bh);
+ return FFS_SUCCESS;
+ }
+ ret = FFS_ERROR;
+error:
+ if (tmp_bh)
+ brelse(tmp_bh);
+ free_upcase_table(sb);
+ return ret;
+}
+
+static s32 __load_default_upcase_table(struct super_block *sb)
+{
+ int i, ret = FFS_ERROR;
+ u32 j;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ u8 skip = FALSE;
+ u32 index = 0;
+ u16 uni = 0;
+ u16 **upcase_table;
+
+ upcase_table = p_fs->vol_utbl = kmalloc(UTBL_COL_COUNT * sizeof(u16 *),
+ GFP_KERNEL);
+ if (upcase_table == NULL)
+ return FFS_MEMORYERR;
+ memset(upcase_table, 0, UTBL_COL_COUNT * sizeof(u16 *));
+
+ for (i = 0; index <= 0xFFFF && i < NUM_UPCASE*2; i += 2) {
+ uni = GET16(uni_upcase + i);
+ if (skip) {
+ pr_debug("skip from 0x%X ", index);
+ index += uni;
+ pr_debug("to 0x%X (amount of 0x%X)\n", index, uni);
+ skip = FALSE;
+ } else if (uni == index)
+ index++;
+ else if (uni == 0xFFFF)
+ skip = TRUE;
+ else { /* uni != index , uni != 0xFFFF */
+ u16 col_index = get_col_index(index);
+
+ if (upcase_table[col_index] == NULL) {
+ pr_debug("alloc = 0x%X\n", col_index);
+ upcase_table[col_index] = kmalloc_array(UTBL_ROW_COUNT,
+ sizeof(u16),
+ GFP_KERNEL);
+ if (upcase_table[col_index] == NULL) {
+ ret = FFS_MEMORYERR;
+ goto error;
+ }
+
+ for (j = 0; j < UTBL_ROW_COUNT; j++)
+ upcase_table[col_index][j] = (col_index << LOW_INDEX_BIT) | j;
+ }
+
+ upcase_table[col_index][get_row_index(index)] = uni;
+ index++;
+ }
+ }
+
+ if (index >= 0xFFFF)
+ return FFS_SUCCESS;
+
+error:
+ /* FATAL error: default upcase table has error */
+ free_upcase_table(sb);
+ return ret;
+}
+
+s32 load_upcase_table(struct super_block *sb)
+{
+ int i;
+ u32 tbl_clu, tbl_size;
+ sector_t sector;
+ u32 type, num_sectors;
+ struct chain_t clu;
+ struct case_dentry_t *ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ clu.dir = p_fs->root_dir;
+ clu.flags = 0x01;
+
+ if (p_fs->dev_ejected)
+ return FFS_MEDIAERR;
+
+ while (clu.dir != CLUSTER_32(~0)) {
+ for (i = 0; i < p_fs->dentries_per_clu; i++) {
+ ep = (struct case_dentry_t *)get_entry_in_dir(sb, &clu,
+ i, NULL);
+ if (!ep)
+ return FFS_MEDIAERR;
+
+ type = p_fs->fs_func->get_entry_type((struct dentry_t *)ep);
+
+ if (type == TYPE_UNUSED)
+ break;
+ if (type != TYPE_UPCASE)
+ continue;
+
+ tbl_clu = GET32_A(ep->start_clu);
+ tbl_size = (u32) GET64_A(ep->size);
+
+ sector = START_SECTOR(tbl_clu);
+ num_sectors = ((tbl_size-1) >> p_bd->sector_size_bits) + 1;
+ if (__load_upcase_table(sb, sector, num_sectors,
+ GET32_A(ep->checksum)) != FFS_SUCCESS)
+ break;
+ return FFS_SUCCESS;
+ }
+ if (FAT_read(sb, clu.dir, &clu.dir) != 0)
+ return FFS_MEDIAERR;
+ }
+ /* load default upcase table */
+ return __load_default_upcase_table(sb);
+}
+
+void free_upcase_table(struct super_block *sb)
+{
+ u32 i;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ u16 **upcase_table;
+
+ upcase_table = p_fs->vol_utbl;
+ for (i = 0; i < UTBL_COL_COUNT; i++)
+ kfree(upcase_table[i]);
+
+ kfree(p_fs->vol_utbl);
+ p_fs->vol_utbl = NULL;
+}
+
+/*
+ * Directory Entry Management Functions
+ */
+
+u32 fat_get_entry_type(struct dentry_t *p_entry)
+{
+ struct dos_dentry_t *ep = (struct dos_dentry_t *) p_entry;
+
+ if (*(ep->name) == 0x0)
+ return TYPE_UNUSED;
+
+ else if (*(ep->name) == 0xE5)
+ return TYPE_DELETED;
+
+ else if (ep->attr == ATTR_EXTEND)
+ return TYPE_EXTEND;
+
+ else if ((ep->attr & (ATTR_SUBDIR|ATTR_VOLUME)) == ATTR_VOLUME)
+ return TYPE_VOLUME;
+
+ else if ((ep->attr & (ATTR_SUBDIR|ATTR_VOLUME)) == ATTR_SUBDIR)
+ return TYPE_DIR;
+
+ return TYPE_FILE;
+}
+
+u32 exfat_get_entry_type(struct dentry_t *p_entry)
+{
+ struct file_dentry_t *ep = (struct file_dentry_t *) p_entry;
+
+ if (ep->type == 0x0) {
+ return TYPE_UNUSED;
+ } else if (ep->type < 0x80) {
+ return TYPE_DELETED;
+ } else if (ep->type == 0x80) {
+ return TYPE_INVALID;
+ } else if (ep->type < 0xA0) {
+ if (ep->type == 0x81) {
+ return TYPE_BITMAP;
+ } else if (ep->type == 0x82) {
+ return TYPE_UPCASE;
+ } else if (ep->type == 0x83) {
+ return TYPE_VOLUME;
+ } else if (ep->type == 0x85) {
+ if (GET16_A(ep->attr) & ATTR_SUBDIR)
+ return TYPE_DIR;
+ else
+ return TYPE_FILE;
+ }
+ return TYPE_CRITICAL_PRI;
+ } else if (ep->type < 0xC0) {
+ if (ep->type == 0xA0)
+ return TYPE_GUID;
+ else if (ep->type == 0xA1)
+ return TYPE_PADDING;
+ else if (ep->type == 0xA2)
+ return TYPE_ACLTAB;
+ return TYPE_BENIGN_PRI;
+ } else if (ep->type < 0xE0) {
+ if (ep->type == 0xC0)
+ return TYPE_STREAM;
+ else if (ep->type == 0xC1)
+ return TYPE_EXTEND;
+ else if (ep->type == 0xC2)
+ return TYPE_ACL;
+ return TYPE_CRITICAL_SEC;
+ }
+
+ return TYPE_BENIGN_SEC;
+}
+
+void fat_set_entry_type(struct dentry_t *p_entry, u32 type)
+{
+ struct dos_dentry_t *ep = (struct dos_dentry_t *) p_entry;
+
+ if (type == TYPE_UNUSED)
+ *(ep->name) = 0x0;
+
+ else if (type == TYPE_DELETED)
+ *(ep->name) = 0xE5;
+
+ else if (type == TYPE_EXTEND)
+ ep->attr = ATTR_EXTEND;
+
+ else if (type == TYPE_DIR)
+ ep->attr = ATTR_SUBDIR;
+
+ else if (type == TYPE_FILE)
+ ep->attr = ATTR_ARCHIVE;
+
+ else if (type == TYPE_SYMLINK)
+ ep->attr = ATTR_ARCHIVE | ATTR_SYMLINK;
+}
+
+void exfat_set_entry_type(struct dentry_t *p_entry, u32 type)
+{
+ struct file_dentry_t *ep = (struct file_dentry_t *) p_entry;
+
+ if (type == TYPE_UNUSED) {
+ ep->type = 0x0;
+ } else if (type == TYPE_DELETED) {
+ ep->type &= ~0x80;
+ } else if (type == TYPE_STREAM) {
+ ep->type = 0xC0;
+ } else if (type == TYPE_EXTEND) {
+ ep->type = 0xC1;
+ } else if (type == TYPE_BITMAP) {
+ ep->type = 0x81;
+ } else if (type == TYPE_UPCASE) {
+ ep->type = 0x82;
+ } else if (type == TYPE_VOLUME) {
+ ep->type = 0x83;
+ } else if (type == TYPE_DIR) {
+ ep->type = 0x85;
+ SET16_A(ep->attr, ATTR_SUBDIR);
+ } else if (type == TYPE_FILE) {
+ ep->type = 0x85;
+ SET16_A(ep->attr, ATTR_ARCHIVE);
+ } else if (type == TYPE_SYMLINK) {
+ ep->type = 0x85;
+ SET16_A(ep->attr, ATTR_ARCHIVE | ATTR_SYMLINK);
+ }
+}
+
+u32 fat_get_entry_attr(struct dentry_t *p_entry)
+{
+ struct dos_dentry_t *ep = (struct dos_dentry_t *) p_entry;
+
+ return (u32) ep->attr;
+}
+
+u32 exfat_get_entry_attr(struct dentry_t *p_entry)
+{
+ struct file_dentry_t *ep = (struct file_dentry_t *) p_entry;
+
+ return (u32) GET16_A(ep->attr);
+}
+
+void fat_set_entry_attr(struct dentry_t *p_entry, u32 attr)
+{
+ struct dos_dentry_t *ep = (struct dos_dentry_t *) p_entry;
+
+ ep->attr = (u8) attr;
+}
+
+void exfat_set_entry_attr(struct dentry_t *p_entry, u32 attr)
+{
+ struct file_dentry_t *ep = (struct file_dentry_t *) p_entry;
+
+ SET16_A(ep->attr, (u16) attr);
+}
+
+u8 fat_get_entry_flag(struct dentry_t *p_entry)
+{
+ return 0x01;
+}
+
+u8 exfat_get_entry_flag(struct dentry_t *p_entry)
+{
+ struct strm_dentry_t *ep = (struct strm_dentry_t *) p_entry;
+
+ return ep->flags;
+}
+
+void fat_set_entry_flag(struct dentry_t *p_entry, u8 flags)
+{
+}
+
+void exfat_set_entry_flag(struct dentry_t *p_entry, u8 flags)
+{
+ struct strm_dentry_t *ep = (struct strm_dentry_t *) p_entry;
+
+ ep->flags = flags;
+}
+
+u32 fat_get_entry_clu0(struct dentry_t *p_entry)
+{
+ struct dos_dentry_t *ep = (struct dos_dentry_t *) p_entry;
+
+ return ((u32)GET16_A(ep->start_clu_hi) << 16) |
+ GET16_A(ep->start_clu_lo);
+}
+
+u32 exfat_get_entry_clu0(struct dentry_t *p_entry)
+{
+ struct strm_dentry_t *ep = (struct strm_dentry_t *) p_entry;
+
+ return GET32_A(ep->start_clu);
+}
+
+void fat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu)
+{
+ struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
+
+ SET16_A(ep->start_clu_lo, CLUSTER_16(start_clu));
+ SET16_A(ep->start_clu_hi, CLUSTER_16(start_clu >> 16));
+}
+
+void exfat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu)
+{
+ struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
+
+ SET32_A(ep->start_clu, start_clu);
+}
+
+u64 fat_get_entry_size(struct dentry_t *p_entry)
+{
+ struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
+
+ return (u64) GET32_A(ep->size);
+}
+
+u64 exfat_get_entry_size(struct dentry_t *p_entry)
+{
+ struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
+
+ return GET64_A(ep->valid_size);
+}
+
+void fat_set_entry_size(struct dentry_t *p_entry, u64 size)
+{
+ struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
+
+ SET32_A(ep->size, (u32) size);
+}
+
+void exfat_set_entry_size(struct dentry_t *p_entry, u64 size)
+{
+ struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
+
+ SET64_A(ep->valid_size, size);
+ SET64_A(ep->size, size);
+}
+
+void fat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
+ u8 mode)
+{
+ u16 t = 0x00, d = 0x21;
+ struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
+
+ switch (mode) {
+ case TM_CREATE:
+ t = GET16_A(ep->create_time);
+ d = GET16_A(ep->create_date);
+ break;
+ case TM_MODIFY:
+ t = GET16_A(ep->modify_time);
+ d = GET16_A(ep->modify_date);
+ break;
+ }
+
+ tp->sec = (t & 0x001F) << 1;
+ tp->min = (t >> 5) & 0x003F;
+ tp->hour = (t >> 11);
+ tp->day = (d & 0x001F);
+ tp->mon = (d >> 5) & 0x000F;
+ tp->year = (d >> 9);
+}
+
+void exfat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
+ u8 mode)
+{
+ u16 t = 0x00, d = 0x21;
+ struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
+
+ switch (mode) {
+ case TM_CREATE:
+ t = GET16_A(ep->create_time);
+ d = GET16_A(ep->create_date);
+ break;
+ case TM_MODIFY:
+ t = GET16_A(ep->modify_time);
+ d = GET16_A(ep->modify_date);
+ break;
+ case TM_ACCESS:
+ t = GET16_A(ep->access_time);
+ d = GET16_A(ep->access_date);
+ break;
+ }
+
+ tp->sec = (t & 0x001F) << 1;
+ tp->min = (t >> 5) & 0x003F;
+ tp->hour = (t >> 11);
+ tp->day = (d & 0x001F);
+ tp->mon = (d >> 5) & 0x000F;
+ tp->year = (d >> 9);
+}
+
+void fat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
+ u8 mode)
+{
+ u16 t, d;
+ struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
+
+ t = (tp->hour << 11) | (tp->min << 5) | (tp->sec >> 1);
+ d = (tp->year << 9) | (tp->mon << 5) | tp->day;
+
+ switch (mode) {
+ case TM_CREATE:
+ SET16_A(ep->create_time, t);
+ SET16_A(ep->create_date, d);
+ break;
+ case TM_MODIFY:
+ SET16_A(ep->modify_time, t);
+ SET16_A(ep->modify_date, d);
+ break;
+ }
+}
+
+void exfat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
+ u8 mode)
+{
+ u16 t, d;
+ struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
+
+ t = (tp->hour << 11) | (tp->min << 5) | (tp->sec >> 1);
+ d = (tp->year << 9) | (tp->mon << 5) | tp->day;
+
+ switch (mode) {
+ case TM_CREATE:
+ SET16_A(ep->create_time, t);
+ SET16_A(ep->create_date, d);
+ break;
+ case TM_MODIFY:
+ SET16_A(ep->modify_time, t);
+ SET16_A(ep->modify_date, d);
+ break;
+ case TM_ACCESS:
+ SET16_A(ep->access_time, t);
+ SET16_A(ep->access_date, d);
+ break;
+ }
+}
+
+s32 fat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry,
+ u32 type, u32 start_clu, u64 size)
+{
+ sector_t sector;
+ struct dos_dentry_t *dos_ep;
+
+ dos_ep = (struct dos_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
+ §or);
+ if (!dos_ep)
+ return FFS_MEDIAERR;
+
+ init_dos_entry(dos_ep, type, start_clu);
+ buf_modify(sb, sector);
+
+ return FFS_SUCCESS;
+}
+
+s32 exfat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, u32 type, u32 start_clu, u64 size)
+{
+ sector_t sector;
+ u8 flags;
+ struct file_dentry_t *file_ep;
+ struct strm_dentry_t *strm_ep;
+
+ flags = (type == TYPE_FILE) ? 0x01 : 0x03;
+
+ /* we cannot use get_entry_set_in_dir here because file ep is not initialized yet */
+ file_ep = (struct file_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
+ §or);
+ if (!file_ep)
+ return FFS_MEDIAERR;
+
+ strm_ep = (struct strm_dentry_t *)get_entry_in_dir(sb, p_dir, entry+1,
+ §or);
+ if (!strm_ep)
+ return FFS_MEDIAERR;
+
+ init_file_entry(file_ep, type);
+ buf_modify(sb, sector);
+
+ init_strm_entry(strm_ep, flags, start_clu, size);
+ buf_modify(sb, sector);
+
+ return FFS_SUCCESS;
+}
+
+static s32 fat_init_ext_entry(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, s32 num_entries,
+ struct uni_name_t *p_uniname,
+ struct dos_name_t *p_dosname)
+{
+ int i;
+ sector_t sector;
+ u8 chksum;
+ u16 *uniname = p_uniname->name;
+ struct dos_dentry_t *dos_ep;
+ struct ext_dentry_t *ext_ep;
+
+ dos_ep = (struct dos_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
+ §or);
+ if (!dos_ep)
+ return FFS_MEDIAERR;
+
+ dos_ep->lcase = p_dosname->name_case;
+ memcpy(dos_ep->name, p_dosname->name, DOS_NAME_LENGTH);
+ buf_modify(sb, sector);
+
+ if ((--num_entries) > 0) {
+ chksum = calc_checksum_1byte((void *)dos_ep->name,
+ DOS_NAME_LENGTH, 0);
+
+ for (i = 1; i < num_entries; i++) {
+ ext_ep = (struct ext_dentry_t *)get_entry_in_dir(sb,
+ p_dir,
+ entry - i,
+ §or);
+ if (!ext_ep)
+ return FFS_MEDIAERR;
+
+ init_ext_entry(ext_ep, i, chksum, uniname);
+ buf_modify(sb, sector);
+ uniname += 13;
+ }
+
+ ext_ep = (struct ext_dentry_t *)get_entry_in_dir(sb, p_dir,
+ entry - i,
+ §or);
+ if (!ext_ep)
+ return FFS_MEDIAERR;
+
+ init_ext_entry(ext_ep, i+0x40, chksum, uniname);
+ buf_modify(sb, sector);
+ }
+
+ return FFS_SUCCESS;
+}
+
+static s32 exfat_init_ext_entry(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, s32 num_entries,
+ struct uni_name_t *p_uniname,
+ struct dos_name_t *p_dosname)
+{
+ int i;
+ sector_t sector;
+ u16 *uniname = p_uniname->name;
+ struct file_dentry_t *file_ep;
+ struct strm_dentry_t *strm_ep;
+ struct name_dentry_t *name_ep;
+
+ file_ep = (struct file_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
+ §or);
+ if (!file_ep)
+ return FFS_MEDIAERR;
+
+ file_ep->num_ext = (u8)(num_entries - 1);
+ buf_modify(sb, sector);
+
+ strm_ep = (struct strm_dentry_t *)get_entry_in_dir(sb, p_dir, entry+1,
+ §or);
+ if (!strm_ep)
+ return FFS_MEDIAERR;
+
+ strm_ep->name_len = p_uniname->name_len;
+ SET16_A(strm_ep->name_hash, p_uniname->name_hash);
+ buf_modify(sb, sector);
+
+ for (i = 2; i < num_entries; i++) {
+ name_ep = (struct name_dentry_t *)get_entry_in_dir(sb, p_dir,
+ entry + i,
+ §or);
+ if (!name_ep)
+ return FFS_MEDIAERR;
+
+ init_name_entry(name_ep, uniname);
+ buf_modify(sb, sector);
+ uniname += 15;
+ }
+
+ update_dir_checksum(sb, p_dir, entry);
+
+ return FFS_SUCCESS;
+}
+
+void init_dos_entry(struct dos_dentry_t *ep, u32 type, u32 start_clu)
+{
+ struct timestamp_t tm, *tp;
+
+ fat_set_entry_type((struct dentry_t *) ep, type);
+ SET16_A(ep->start_clu_lo, CLUSTER_16(start_clu));
+ SET16_A(ep->start_clu_hi, CLUSTER_16(start_clu >> 16));
+ SET32_A(ep->size, 0);
+
+ tp = tm_current(&tm);
+ fat_set_entry_time((struct dentry_t *) ep, tp, TM_CREATE);
+ fat_set_entry_time((struct dentry_t *) ep, tp, TM_MODIFY);
+ SET16_A(ep->access_date, 0);
+ ep->create_time_ms = 0;
+}
+
+void init_ext_entry(struct ext_dentry_t *ep, s32 order, u8 chksum, u16 *uniname)
+{
+ int i;
+ u8 end = FALSE;
+
+ fat_set_entry_type((struct dentry_t *) ep, TYPE_EXTEND);
+ ep->order = (u8) order;
+ ep->sysid = 0;
+ ep->checksum = chksum;
+ SET16_A(ep->start_clu, 0);
+
+ for (i = 0; i < 10; i += 2) {
+ if (!end) {
+ SET16(ep->unicode_0_4+i, *uniname);
+ if (*uniname == 0x0)
+ end = TRUE;
+ else
+ uniname++;
+ } else {
+ SET16(ep->unicode_0_4+i, 0xFFFF);
+ }
+ }
+
+ for (i = 0; i < 12; i += 2) {
+ if (!end) {
+ SET16_A(ep->unicode_5_10 + i, *uniname);
+ if (*uniname == 0x0)
+ end = TRUE;
+ else
+ uniname++;
+ } else {
+ SET16_A(ep->unicode_5_10 + i, 0xFFFF);
+ }
+ }
+
+ for (i = 0; i < 4; i += 2) {
+ if (!end) {
+ SET16_A(ep->unicode_11_12 + i, *uniname);
+ if (*uniname == 0x0)
+ end = TRUE;
+ else
+ uniname++;
+ } else {
+ SET16_A(ep->unicode_11_12 + i, 0xFFFF);
+ }
+ }
+}
+
+void init_file_entry(struct file_dentry_t *ep, u32 type)
+{
+ struct timestamp_t tm, *tp;
+
+ exfat_set_entry_type((struct dentry_t *)ep, type);
+
+ tp = tm_current(&tm);
+ exfat_set_entry_time((struct dentry_t *)ep, tp, TM_CREATE);
+ exfat_set_entry_time((struct dentry_t *)ep, tp, TM_MODIFY);
+ exfat_set_entry_time((struct dentry_t *)ep, tp, TM_ACCESS);
+ ep->create_time_ms = 0;
+ ep->modify_time_ms = 0;
+ ep->access_time_ms = 0;
+}
+
+void init_strm_entry(struct strm_dentry_t *ep, u8 flags, u32 start_clu, u64 size)
+{
+ exfat_set_entry_type((struct dentry_t *)ep, TYPE_STREAM);
+ ep->flags = flags;
+ SET32_A(ep->start_clu, start_clu);
+ SET64_A(ep->valid_size, size);
+ SET64_A(ep->size, size);
+}
+
+void init_name_entry(struct name_dentry_t *ep, u16 *uniname)
+{
+ int i;
+
+ exfat_set_entry_type((struct dentry_t *)ep, TYPE_EXTEND);
+ ep->flags = 0x0;
+
+ for (i = 0; i < 30; i++, i++) {
+ SET16_A(ep->unicode_0_14+i, *uniname);
+ if (*uniname == 0x0)
+ break;
+ uniname++;
+ }
+}
+
+void fat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, s32 order, s32 num_entries)
+{
+ int i;
+ sector_t sector;
+ struct dentry_t *ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ for (i = num_entries-1; i >= order; i--) {
+ ep = get_entry_in_dir(sb, p_dir, entry-i, §or);
+ if (!ep)
+ return;
+
+ p_fs->fs_func->set_entry_type(ep, TYPE_DELETED);
+ buf_modify(sb, sector);
+ }
+}
+
+void exfat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, s32 order, s32 num_entries)
+{
+ int i;
+ sector_t sector;
+ struct dentry_t *ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ for (i = order; i < num_entries; i++) {
+ ep = get_entry_in_dir(sb, p_dir, entry+i, §or);
+ if (!ep)
+ return;
+
+ p_fs->fs_func->set_entry_type(ep, TYPE_DELETED);
+ buf_modify(sb, sector);
+ }
+}
+
+void update_dir_checksum(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry)
+{
+ int i, num_entries;
+ sector_t sector;
+ u16 chksum;
+ struct file_dentry_t *file_ep;
+ struct dentry_t *ep;
+
+ file_ep = (struct file_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
+ §or);
+ if (!file_ep)
+ return;
+
+ buf_lock(sb, sector);
+
+ num_entries = (s32) file_ep->num_ext + 1;
+ chksum = calc_checksum_2byte((void *)file_ep, DENTRY_SIZE, 0,
+ CS_DIR_ENTRY);
+
+ for (i = 1; i < num_entries; i++) {
+ ep = get_entry_in_dir(sb, p_dir, entry+i, NULL);
+ if (!ep) {
+ buf_unlock(sb, sector);
+ return;
+ }
+
+ chksum = calc_checksum_2byte((void *)ep, DENTRY_SIZE, chksum,
+ CS_DEFAULT);
+ }
+
+ SET16_A(file_ep->checksum, chksum);
+ buf_modify(sb, sector);
+ buf_unlock(sb, sector);
+}
+
+void update_dir_checksum_with_entry_set(struct super_block *sb,
+ struct entry_set_cache_t *es)
+{
+ struct dentry_t *ep;
+ u16 chksum = 0;
+ s32 chksum_type = CS_DIR_ENTRY, i;
+
+ ep = (struct dentry_t *)&(es->__buf);
+ for (i = 0; i < es->num_entries; i++) {
+ pr_debug("%s ep %p\n", __func__, ep);
+ chksum = calc_checksum_2byte((void *)ep, DENTRY_SIZE, chksum,
+ chksum_type);
+ ep++;
+ chksum_type = CS_DEFAULT;
+ }
+
+ ep = (struct dentry_t *)&(es->__buf);
+ SET16_A(((struct file_dentry_t *)ep)->checksum, chksum);
+ write_whole_entry_set(sb, es);
+}
+
+static s32 _walk_fat_chain(struct super_block *sb, struct chain_t *p_dir,
+ s32 byte_offset, u32 *clu)
+{
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ s32 clu_offset;
+ u32 cur_clu;
+
+ clu_offset = byte_offset >> p_fs->cluster_size_bits;
+ cur_clu = p_dir->dir;
+
+ if (p_dir->flags == 0x03) {
+ cur_clu += clu_offset;
+ } else {
+ while (clu_offset > 0) {
+ if (FAT_read(sb, cur_clu, &cur_clu) == -1)
+ return FFS_MEDIAERR;
+ clu_offset--;
+ }
+ }
+
+ if (clu)
+ *clu = cur_clu;
+ return FFS_SUCCESS;
+}
+
+s32 find_location(struct super_block *sb, struct chain_t *p_dir, s32 entry,
+ sector_t *sector, s32 *offset)
+{
+ s32 off, ret;
+ u32 clu = 0;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ off = entry << DENTRY_SIZE_BITS;
+
+ if (p_dir->dir == CLUSTER_32(0)) { /* FAT16 root_dir */
+ *offset = off & p_bd->sector_size_mask;
+ *sector = off >> p_bd->sector_size_bits;
+ *sector += p_fs->root_start_sector;
+ } else {
+ ret = _walk_fat_chain(sb, p_dir, off, &clu);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ /* byte offset in cluster */
+ off &= p_fs->cluster_size - 1;
+
+ /* byte offset in sector */
+ *offset = off & p_bd->sector_size_mask;
+
+ /* sector offset in cluster */
+ *sector = off >> p_bd->sector_size_bits;
+ *sector += START_SECTOR(clu);
+ }
+ return FFS_SUCCESS;
+}
+
+struct dentry_t *get_entry_with_sector(struct super_block *sb, sector_t sector,
+ s32 offset)
+{
+ u8 *buf;
+
+ buf = buf_getblk(sb, sector);
+
+ if (buf == NULL)
+ return NULL;
+
+ return (struct dentry_t *)(buf + offset);
+}
+
+struct dentry_t *get_entry_in_dir(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, sector_t *sector)
+{
+ s32 off;
+ sector_t sec;
+ u8 *buf;
+
+ if (find_location(sb, p_dir, entry, &sec, &off) != FFS_SUCCESS)
+ return NULL;
+
+ buf = buf_getblk(sb, sec);
+
+ if (buf == NULL)
+ return NULL;
+
+ if (sector != NULL)
+ *sector = sec;
+ return (struct dentry_t *)(buf + off);
+}
+
+/* returns a set of dentries for a file or dir.
+ * Note that this is a copy (dump) of dentries so that user should call write_entry_set()
+ * to apply changes made in this entry set to the real device.
+ * in:
+ * sb+p_dir+entry: indicates a file/dir
+ * type: specifies how many dentries should be included.
+ * out:
+ * file_ep: will point the first dentry(= file dentry) on success
+ * return:
+ * pointer of entry set on success,
+ * NULL on failure.
+ */
+
+#define ES_MODE_STARTED 0
+#define ES_MODE_GET_FILE_ENTRY 1
+#define ES_MODE_GET_STRM_ENTRY 2
+#define ES_MODE_GET_NAME_ENTRY 3
+#define ES_MODE_GET_CRITICAL_SEC_ENTRY 4
+struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb,
+ struct chain_t *p_dir, s32 entry,
+ u32 type,
+ struct dentry_t **file_ep)
+{
+ s32 off, ret, byte_offset;
+ u32 clu = 0;
+ sector_t sec;
+ u32 entry_type;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+ struct entry_set_cache_t *es = NULL;
+ struct dentry_t *ep, *pos;
+ u8 *buf;
+ u8 num_entries;
+ s32 mode = ES_MODE_STARTED;
+ size_t bufsize;
+
+ pr_debug("%s entered p_dir dir %u flags %x size %d\n",
+ __func__, p_dir->dir, p_dir->flags, p_dir->size);
+
+ byte_offset = entry << DENTRY_SIZE_BITS;
+ ret = _walk_fat_chain(sb, p_dir, byte_offset, &clu);
+ if (ret != FFS_SUCCESS)
+ return NULL;
+
+
+ /* byte offset in cluster */
+ byte_offset &= p_fs->cluster_size - 1;
+
+ /* byte offset in sector */
+ off = byte_offset & p_bd->sector_size_mask;
+
+ /* sector offset in cluster */
+ sec = byte_offset >> p_bd->sector_size_bits;
+ sec += START_SECTOR(clu);
+
+ buf = buf_getblk(sb, sec);
+ if (buf == NULL)
+ goto err_out;
+
+
+ ep = (struct dentry_t *)(buf + off);
+ entry_type = p_fs->fs_func->get_entry_type(ep);
+
+ if ((entry_type != TYPE_FILE)
+ && (entry_type != TYPE_DIR))
+ goto err_out;
+
+ if (type == ES_ALL_ENTRIES)
+ num_entries = ((struct file_dentry_t *)ep)->num_ext+1;
+ else
+ num_entries = type;
+
+ bufsize = offsetof(struct entry_set_cache_t, __buf) + (num_entries) *
+ sizeof(struct dentry_t);
+ pr_debug("%s: trying to kmalloc %zx bytes for %d entries\n", __func__,
+ bufsize, num_entries);
+ es = kmalloc(bufsize, GFP_KERNEL);
+ if (es == NULL)
+ goto err_out;
+
+ es->num_entries = num_entries;
+ es->sector = sec;
+ es->offset = off;
+ es->alloc_flag = p_dir->flags;
+
+ pos = (struct dentry_t *) &(es->__buf);
+
+ while (num_entries) {
+ /*
+ * instead of copying whole sector, we will check every entry.
+ * this will provide minimum stablity and consistancy.
+ */
+ entry_type = p_fs->fs_func->get_entry_type(ep);
+
+ if ((entry_type == TYPE_UNUSED) || (entry_type == TYPE_DELETED))
+ goto err_out;
+
+ switch (mode) {
+ case ES_MODE_STARTED:
+ if ((entry_type == TYPE_FILE) || (entry_type == TYPE_DIR))
+ mode = ES_MODE_GET_FILE_ENTRY;
+ else
+ goto err_out;
+ break;
+ case ES_MODE_GET_FILE_ENTRY:
+ if (entry_type == TYPE_STREAM)
+ mode = ES_MODE_GET_STRM_ENTRY;
+ else
+ goto err_out;
+ break;
+ case ES_MODE_GET_STRM_ENTRY:
+ if (entry_type == TYPE_EXTEND)
+ mode = ES_MODE_GET_NAME_ENTRY;
+ else
+ goto err_out;
+ break;
+ case ES_MODE_GET_NAME_ENTRY:
+ if (entry_type == TYPE_EXTEND)
+ break;
+ else if (entry_type == TYPE_STREAM)
+ goto err_out;
+ else if (entry_type & TYPE_CRITICAL_SEC)
+ mode = ES_MODE_GET_CRITICAL_SEC_ENTRY;
+ else
+ goto err_out;
+ break;
+ case ES_MODE_GET_CRITICAL_SEC_ENTRY:
+ if ((entry_type == TYPE_EXTEND) ||
+ (entry_type == TYPE_STREAM))
+ goto err_out;
+ else if ((entry_type & TYPE_CRITICAL_SEC) !=
+ TYPE_CRITICAL_SEC)
+ goto err_out;
+ break;
+ }
+
+ memcpy(pos, ep, sizeof(struct dentry_t));
+
+ if (--num_entries == 0)
+ break;
+
+ if (((off + DENTRY_SIZE) & p_bd->sector_size_mask) <
+ (off & p_bd->sector_size_mask)) {
+ /* get the next sector */
+ if (IS_LAST_SECTOR_IN_CLUSTER(sec)) {
+ if (es->alloc_flag == 0x03) {
+ clu++;
+ } else {
+ if (FAT_read(sb, clu, &clu) == -1)
+ goto err_out;
+ }
+ sec = START_SECTOR(clu);
+ } else {
+ sec++;
+ }
+ buf = buf_getblk(sb, sec);
+ if (buf == NULL)
+ goto err_out;
+ off = 0;
+ ep = (struct dentry_t *)(buf);
+ } else {
+ ep++;
+ off += DENTRY_SIZE;
+ }
+ pos++;
+ }
+
+ if (file_ep)
+ *file_ep = (struct dentry_t *)&(es->__buf);
+
+ pr_debug("%s exiting es %p sec %llu offset %d flags %d, num_entries %u buf ptr %p\n",
+ __func__, es, (unsigned long long)es->sector, es->offset,
+ es->alloc_flag, es->num_entries, &es->__buf);
+ return es;
+err_out:
+ pr_debug("%s exited NULL (es %p)\n", __func__, es);
+ kfree(es);
+ return NULL;
+}
+
+void release_entry_set(struct entry_set_cache_t *es)
+{
+ pr_debug("%s es=%p\n", __func__, es);
+ kfree(es);
+}
+
+
+static s32 __write_partial_entries_in_entry_set(struct super_block *sb,
+ struct entry_set_cache_t *es,
+ sector_t sec, s32 off, u32 count)
+{
+ s32 num_entries, buf_off = (off - es->offset);
+ u32 remaining_byte_in_sector, copy_entries;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+ u32 clu;
+ u8 *buf, *esbuf = (u8 *)&(es->__buf);
+
+ pr_debug("%s entered es %p sec %llu off %d count %d\n",
+ __func__, es, (unsigned long long)sec, off, count);
+ num_entries = count;
+
+ while (num_entries) {
+ /* white per sector base */
+ remaining_byte_in_sector = (1 << p_bd->sector_size_bits) - off;
+ copy_entries = min_t(s32,
+ remaining_byte_in_sector >> DENTRY_SIZE_BITS,
+ num_entries);
+ buf = buf_getblk(sb, sec);
+ if (buf == NULL)
+ goto err_out;
+ pr_debug("es->buf %p buf_off %u\n", esbuf, buf_off);
+ pr_debug("copying %d entries from %p to sector %llu\n",
+ copy_entries, (esbuf + buf_off),
+ (unsigned long long)sec);
+ memcpy(buf + off, esbuf + buf_off,
+ copy_entries << DENTRY_SIZE_BITS);
+ buf_modify(sb, sec);
+ num_entries -= copy_entries;
+
+ if (num_entries) {
+ /* get next sector */
+ if (IS_LAST_SECTOR_IN_CLUSTER(sec)) {
+ clu = GET_CLUSTER_FROM_SECTOR(sec);
+ if (es->alloc_flag == 0x03) {
+ clu++;
+ } else {
+ if (FAT_read(sb, clu, &clu) == -1)
+ goto err_out;
+ }
+ sec = START_SECTOR(clu);
+ } else {
+ sec++;
+ }
+ off = 0;
+ buf_off += copy_entries << DENTRY_SIZE_BITS;
+ }
+ }
+
+ pr_debug("%s exited successfully\n", __func__);
+ return FFS_SUCCESS;
+err_out:
+ pr_debug("%s failed\n", __func__);
+ return FFS_ERROR;
+}
+
+/* write back all entries in entry set */
+s32 write_whole_entry_set(struct super_block *sb, struct entry_set_cache_t *es)
+{
+ return __write_partial_entries_in_entry_set(sb, es, es->sector,
+ es->offset,
+ es->num_entries);
+}
+
+/* write back some entries in entry set */
+s32 write_partial_entries_in_entry_set(struct super_block *sb,
+ struct entry_set_cache_t *es, struct dentry_t *ep, u32 count)
+{
+ s32 ret, byte_offset, off;
+ u32 clu = 0;
+ sector_t sec;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+ struct chain_t dir;
+
+ /* vaidity check */
+ if (ep + count > ((struct dentry_t *)&(es->__buf)) + es->num_entries)
+ return FFS_ERROR;
+
+ dir.dir = GET_CLUSTER_FROM_SECTOR(es->sector);
+ dir.flags = es->alloc_flag;
+ dir.size = 0xffffffff; /* XXX */
+
+ byte_offset = (es->sector - START_SECTOR(dir.dir)) <<
+ p_bd->sector_size_bits;
+ byte_offset += ((void **)ep - &(es->__buf)) + es->offset;
+
+ ret = _walk_fat_chain(sb, &dir, byte_offset, &clu);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ /* byte offset in cluster */
+ byte_offset &= p_fs->cluster_size - 1;
+
+ /* byte offset in sector */
+ off = byte_offset & p_bd->sector_size_mask;
+
+ /* sector offset in cluster */
+ sec = byte_offset >> p_bd->sector_size_bits;
+ sec += START_SECTOR(clu);
+ return __write_partial_entries_in_entry_set(sb, es, sec, off, count);
+}
+
+/* search EMPTY CONTINUOUS "num_entries" entries */
+s32 search_deleted_or_unused_entry(struct super_block *sb,
+ struct chain_t *p_dir, s32 num_entries)
+{
+ int i, dentry, num_empty = 0;
+ s32 dentries_per_clu;
+ u32 type;
+ struct chain_t clu;
+ struct dentry_t *ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
+ dentries_per_clu = p_fs->dentries_in_root;
+ else
+ dentries_per_clu = p_fs->dentries_per_clu;
+
+ if (p_fs->hint_uentry.dir == p_dir->dir) {
+ if (p_fs->hint_uentry.entry == -1)
+ return -1;
+
+ clu.dir = p_fs->hint_uentry.clu.dir;
+ clu.size = p_fs->hint_uentry.clu.size;
+ clu.flags = p_fs->hint_uentry.clu.flags;
+
+ dentry = p_fs->hint_uentry.entry;
+ } else {
+ p_fs->hint_uentry.entry = -1;
+
+ clu.dir = p_dir->dir;
+ clu.size = p_dir->size;
+ clu.flags = p_dir->flags;
+
+ dentry = 0;
+ }
+
+ while (clu.dir != CLUSTER_32(~0)) {
+ if (p_fs->dev_ejected)
+ break;
+
+ if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
+ i = dentry % dentries_per_clu;
+ else
+ i = dentry & (dentries_per_clu-1);
+
+ for (; i < dentries_per_clu; i++, dentry++) {
+ ep = get_entry_in_dir(sb, &clu, i, NULL);
+ if (!ep)
+ return -1;
+
+ type = p_fs->fs_func->get_entry_type(ep);
+
+ if (type == TYPE_UNUSED) {
+ num_empty++;
+ if (p_fs->hint_uentry.entry == -1) {
+ p_fs->hint_uentry.dir = p_dir->dir;
+ p_fs->hint_uentry.entry = dentry;
+
+ p_fs->hint_uentry.clu.dir = clu.dir;
+ p_fs->hint_uentry.clu.size = clu.size;
+ p_fs->hint_uentry.clu.flags = clu.flags;
+ }
+ } else if (type == TYPE_DELETED) {
+ num_empty++;
+ } else {
+ num_empty = 0;
+ }
+
+ if (num_empty >= num_entries) {
+ p_fs->hint_uentry.dir = CLUSTER_32(~0);
+ p_fs->hint_uentry.entry = -1;
+
+ if (p_fs->vol_type == EXFAT)
+ return dentry - (num_entries-1);
+ else
+ return dentry;
+ }
+ }
+
+ if (p_dir->dir == CLUSTER_32(0))
+ break; /* FAT16 root_dir */
+
+ if (clu.flags == 0x03) {
+ if ((--clu.size) > 0)
+ clu.dir++;
+ else
+ clu.dir = CLUSTER_32(~0);
+ } else {
+ if (FAT_read(sb, clu.dir, &clu.dir) != 0)
+ return -1;
+ }
+ }
+
+ return -1;
+}
+
+s32 find_empty_entry(struct inode *inode, struct chain_t *p_dir, s32 num_entries)
+{
+ s32 ret, dentry;
+ u32 last_clu;
+ sector_t sector;
+ u64 size = 0;
+ struct chain_t clu;
+ struct dentry_t *ep = NULL;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct file_id_t *fid = &(EXFAT_I(inode)->fid);
+
+ if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
+ return search_deleted_or_unused_entry(sb, p_dir, num_entries);
+
+ while ((dentry = search_deleted_or_unused_entry(sb, p_dir, num_entries)) < 0) {
+ if (p_fs->dev_ejected)
+ break;
+
+ if (p_fs->vol_type == EXFAT) {
+ if (p_dir->dir != p_fs->root_dir)
+ size = i_size_read(inode);
+ }
+
+ last_clu = find_last_cluster(sb, p_dir);
+ clu.dir = last_clu + 1;
+ clu.size = 0;
+ clu.flags = p_dir->flags;
+
+ /* (1) allocate a cluster */
+ ret = p_fs->fs_func->alloc_cluster(sb, 1, &clu);
+ if (ret < 1)
+ return -1;
+
+ if (clear_cluster(sb, clu.dir) != FFS_SUCCESS)
+ return -1;
+
+ /* (2) append to the FAT chain */
+ if (clu.flags != p_dir->flags) {
+ exfat_chain_cont_cluster(sb, p_dir->dir, p_dir->size);
+ p_dir->flags = 0x01;
+ p_fs->hint_uentry.clu.flags = 0x01;
+ }
+ if (clu.flags == 0x01)
+ if (FAT_write(sb, last_clu, clu.dir) < 0)
+ return -1;
+
+ if (p_fs->hint_uentry.entry == -1) {
+ p_fs->hint_uentry.dir = p_dir->dir;
+ p_fs->hint_uentry.entry = p_dir->size << (p_fs->cluster_size_bits - DENTRY_SIZE_BITS);
+
+ p_fs->hint_uentry.clu.dir = clu.dir;
+ p_fs->hint_uentry.clu.size = 0;
+ p_fs->hint_uentry.clu.flags = clu.flags;
+ }
+ p_fs->hint_uentry.clu.size++;
+ p_dir->size++;
+
+ /* (3) update the directory entry */
+ if (p_fs->vol_type == EXFAT) {
+ if (p_dir->dir != p_fs->root_dir) {
+ size += p_fs->cluster_size;
+
+ ep = get_entry_in_dir(sb, &fid->dir,
+ fid->entry + 1, §or);
+ if (!ep)
+ return -1;
+ p_fs->fs_func->set_entry_size(ep, size);
+ p_fs->fs_func->set_entry_flag(ep, p_dir->flags);
+ buf_modify(sb, sector);
+
+ update_dir_checksum(sb, &(fid->dir),
+ fid->entry);
+ }
+ }
+
+ i_size_write(inode, i_size_read(inode)+p_fs->cluster_size);
+ EXFAT_I(inode)->mmu_private += p_fs->cluster_size;
+ EXFAT_I(inode)->fid.size += p_fs->cluster_size;
+ EXFAT_I(inode)->fid.flags = p_dir->flags;
+ inode->i_blocks += 1 << (p_fs->cluster_size_bits - 9);
+ }
+
+ return dentry;
+}
+
+/* return values of fat_find_dir_entry()
+ * >= 0 : return dir entiry position with the name in dir
+ * -1 : (root dir, ".") it is the root dir itself
+ * -2 : entry with the name does not exist
+ */
+s32 fat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname, s32 num_entries,
+ struct dos_name_t *p_dosname, u32 type)
+{
+ int i, dentry = 0, lossy = FALSE, len;
+ s32 order = 0, is_feasible_entry = TRUE, has_ext_entry = FALSE;
+ s32 dentries_per_clu;
+ u32 entry_type;
+ u16 entry_uniname[14], *uniname = NULL, unichar;
+ struct chain_t clu;
+ struct dentry_t *ep;
+ struct dos_dentry_t *dos_ep;
+ struct ext_dentry_t *ext_ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if (p_dir->dir == p_fs->root_dir) {
+ if ((!nls_uniname_cmp(sb, p_uniname->name,
+ (u16 *)UNI_CUR_DIR_NAME)) ||
+ (!nls_uniname_cmp(sb, p_uniname->name,
+ (u16 *)UNI_PAR_DIR_NAME)))
+ return -1; // special case, root directory itself
+ }
+
+ if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
+ dentries_per_clu = p_fs->dentries_in_root;
+ else
+ dentries_per_clu = p_fs->dentries_per_clu;
+
+ clu.dir = p_dir->dir;
+ clu.flags = p_dir->flags;
+
+ while (clu.dir != CLUSTER_32(~0)) {
+ if (p_fs->dev_ejected)
+ break;
+
+ for (i = 0; i < dentries_per_clu; i++, dentry++) {
+ ep = get_entry_in_dir(sb, &clu, i, NULL);
+ if (!ep)
+ return -2;
+
+ entry_type = p_fs->fs_func->get_entry_type(ep);
+
+ if ((entry_type == TYPE_FILE) || (entry_type == TYPE_DIR)) {
+ if ((type == TYPE_ALL) || (type == entry_type)) {
+ if (is_feasible_entry && has_ext_entry)
+ return dentry;
+
+ dos_ep = (struct dos_dentry_t *) ep;
+ if ((!lossy) && (!nls_dosname_cmp(sb, p_dosname->name, dos_ep->name)))
+ return dentry;
+ }
+ is_feasible_entry = TRUE;
+ has_ext_entry = FALSE;
+ } else if (entry_type == TYPE_EXTEND) {
+ if (is_feasible_entry) {
+ ext_ep = (struct ext_dentry_t *) ep;
+ if (ext_ep->order > 0x40) {
+ order = (s32)(ext_ep->order - 0x40);
+ uniname = p_uniname->name + 13 * (order-1);
+ } else {
+ order = (s32) ext_ep->order;
+ uniname -= 13;
+ }
+
+ len = extract_uni_name_from_ext_entry(ext_ep, entry_uniname, order);
+
+ unichar = *(uniname+len);
+ *(uniname+len) = 0x0;
+
+ if (nls_uniname_cmp(sb, uniname, entry_uniname))
+ is_feasible_entry = FALSE;
+
+ *(uniname+len) = unichar;
+ }
+ has_ext_entry = TRUE;
+ } else if (entry_type == TYPE_UNUSED) {
+ return -2;
+ }
+ is_feasible_entry = TRUE;
+ has_ext_entry = FALSE;
+ }
+
+ if (p_dir->dir == CLUSTER_32(0))
+ break; /* FAT16 root_dir */
+
+ if (FAT_read(sb, clu.dir, &clu.dir) != 0)
+ return -2;
+ }
+
+ return -2;
+}
+
+/* return values of exfat_find_dir_entry()
+ * >= 0 : return dir entiry position with the name in dir
+ * -1 : (root dir, ".") it is the root dir itself
+ * -2 : entry with the name does not exist
+ */
+s32 exfat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname, s32 num_entries,
+ struct dos_name_t *p_dosname, u32 type)
+{
+ int i = 0, dentry = 0, num_ext_entries = 0, len, step;
+ s32 order = 0, is_feasible_entry = FALSE;
+ s32 dentries_per_clu, num_empty = 0;
+ u32 entry_type;
+ u16 entry_uniname[16], *uniname = NULL, unichar;
+ struct chain_t clu;
+ struct dentry_t *ep;
+ struct file_dentry_t *file_ep;
+ struct strm_dentry_t *strm_ep;
+ struct name_dentry_t *name_ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if (p_dir->dir == p_fs->root_dir) {
+ if ((!nls_uniname_cmp(sb, p_uniname->name,
+ (u16 *)UNI_CUR_DIR_NAME)) ||
+ (!nls_uniname_cmp(sb, p_uniname->name,
+ (u16 *)UNI_PAR_DIR_NAME)))
+ return -1; // special case, root directory itself
+ }
+
+ if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
+ dentries_per_clu = p_fs->dentries_in_root;
+ else
+ dentries_per_clu = p_fs->dentries_per_clu;
+
+ clu.dir = p_dir->dir;
+ clu.size = p_dir->size;
+ clu.flags = p_dir->flags;
+
+ p_fs->hint_uentry.dir = p_dir->dir;
+ p_fs->hint_uentry.entry = -1;
+
+ while (clu.dir != CLUSTER_32(~0)) {
+ if (p_fs->dev_ejected)
+ break;
+
+ while (i < dentries_per_clu) {
+ ep = get_entry_in_dir(sb, &clu, i, NULL);
+ if (!ep)
+ return -2;
+
+ entry_type = p_fs->fs_func->get_entry_type(ep);
+ step = 1;
+
+ if ((entry_type == TYPE_UNUSED) || (entry_type == TYPE_DELETED)) {
+ is_feasible_entry = FALSE;
+
+ if (p_fs->hint_uentry.entry == -1) {
+ num_empty++;
+
+ if (num_empty == 1) {
+ p_fs->hint_uentry.clu.dir = clu.dir;
+ p_fs->hint_uentry.clu.size = clu.size;
+ p_fs->hint_uentry.clu.flags = clu.flags;
+ }
+ if ((num_empty >= num_entries) || (entry_type == TYPE_UNUSED))
+ p_fs->hint_uentry.entry = dentry - (num_empty-1);
+ }
+
+ if (entry_type == TYPE_UNUSED)
+ return -2;
+ } else {
+ num_empty = 0;
+
+ if ((entry_type == TYPE_FILE) || (entry_type == TYPE_DIR)) {
+ file_ep = (struct file_dentry_t *) ep;
+ if ((type == TYPE_ALL) || (type == entry_type)) {
+ num_ext_entries = file_ep->num_ext;
+ is_feasible_entry = TRUE;
+ } else {
+ is_feasible_entry = FALSE;
+ step = file_ep->num_ext + 1;
+ }
+ } else if (entry_type == TYPE_STREAM) {
+ if (is_feasible_entry) {
+ strm_ep = (struct strm_dentry_t *)ep;
+ if (p_uniname->name_hash == GET16_A(strm_ep->name_hash) &&
+ p_uniname->name_len == strm_ep->name_len) {
+ order = 1;
+ } else {
+ is_feasible_entry = FALSE;
+ step = num_ext_entries;
+ }
+ }
+ } else if (entry_type == TYPE_EXTEND) {
+ if (is_feasible_entry) {
+ name_ep = (struct name_dentry_t *)ep;
+
+ if ((++order) == 2)
+ uniname = p_uniname->name;
+ else
+ uniname += 15;
+
+ len = extract_uni_name_from_name_entry(name_ep,
+ entry_uniname, order);
+
+ unichar = *(uniname+len);
+ *(uniname+len) = 0x0;
+
+ if (nls_uniname_cmp(sb, uniname, entry_uniname)) {
+ is_feasible_entry = FALSE;
+ step = num_ext_entries - order + 1;
+ } else if (order == num_ext_entries) {
+ p_fs->hint_uentry.dir = CLUSTER_32(~0);
+ p_fs->hint_uentry.entry = -1;
+ return dentry - (num_ext_entries);
+ }
+
+ *(uniname+len) = unichar;
+ }
+ } else {
+ is_feasible_entry = FALSE;
+ }
+ }
+
+ i += step;
+ dentry += step;
+ }
+
+ i -= dentries_per_clu;
+
+ if (p_dir->dir == CLUSTER_32(0))
+ break; /* FAT16 root_dir */
+
+ if (clu.flags == 0x03) {
+ if ((--clu.size) > 0)
+ clu.dir++;
+ else
+ clu.dir = CLUSTER_32(~0);
+ } else {
+ if (FAT_read(sb, clu.dir, &clu.dir) != 0)
+ return -2;
+ }
+ }
+
+ return -2;
+}
+
+s32 fat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, struct dentry_t *p_entry)
+{
+ s32 count = 0;
+ u8 chksum;
+ struct dos_dentry_t *dos_ep = (struct dos_dentry_t *) p_entry;
+ struct ext_dentry_t *ext_ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ chksum = calc_checksum_1byte((void *) dos_ep->name, DOS_NAME_LENGTH, 0);
+
+ for (entry--; entry >= 0; entry--) {
+ ext_ep = (struct ext_dentry_t *)get_entry_in_dir(sb, p_dir,
+ entry, NULL);
+ if (!ext_ep)
+ return -1;
+
+ if ((p_fs->fs_func->get_entry_type((struct dentry_t *)ext_ep) ==
+ TYPE_EXTEND) && (ext_ep->checksum == chksum)) {
+ count++;
+ if (ext_ep->order > 0x40)
+ return count;
+ } else {
+ return count;
+ }
+ }
+
+ return count;
+}
+
+s32 exfat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir,
+ s32 entry, struct dentry_t *p_entry)
+{
+ int i, count = 0;
+ u32 type;
+ struct file_dentry_t *file_ep = (struct file_dentry_t *)p_entry;
+ struct dentry_t *ext_ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ for (i = 0, entry++; i < file_ep->num_ext; i++, entry++) {
+ ext_ep = get_entry_in_dir(sb, p_dir, entry, NULL);
+ if (!ext_ep)
+ return -1;
+
+ type = p_fs->fs_func->get_entry_type(ext_ep);
+ if ((type == TYPE_EXTEND) || (type == TYPE_STREAM))
+ count++;
+ else
+ return count;
+ }
+
+ return count;
+}
+
+s32 count_dos_name_entries(struct super_block *sb, struct chain_t *p_dir,
+ u32 type)
+{
+ int i, count = 0;
+ s32 dentries_per_clu;
+ u32 entry_type;
+ struct chain_t clu;
+ struct dentry_t *ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
+ dentries_per_clu = p_fs->dentries_in_root;
+ else
+ dentries_per_clu = p_fs->dentries_per_clu;
+
+ clu.dir = p_dir->dir;
+ clu.size = p_dir->size;
+ clu.flags = p_dir->flags;
+
+ while (clu.dir != CLUSTER_32(~0)) {
+ if (p_fs->dev_ejected)
+ break;
+
+ for (i = 0; i < dentries_per_clu; i++) {
+ ep = get_entry_in_dir(sb, &clu, i, NULL);
+ if (!ep)
+ return -1;
+
+ entry_type = p_fs->fs_func->get_entry_type(ep);
+
+ if (entry_type == TYPE_UNUSED)
+ return count;
+ if (!(type & TYPE_CRITICAL_PRI) &&
+ !(type & TYPE_BENIGN_PRI))
+ continue;
+
+ if ((type == TYPE_ALL) || (type == entry_type))
+ count++;
+ }
+
+ if (p_dir->dir == CLUSTER_32(0))
+ break; /* FAT16 root_dir */
+
+ if (clu.flags == 0x03) {
+ if ((--clu.size) > 0)
+ clu.dir++;
+ else
+ clu.dir = CLUSTER_32(~0);
+ } else {
+ if (FAT_read(sb, clu.dir, &clu.dir) != 0)
+ return -1;
+ }
+ }
+
+ return count;
+}
+
+bool is_dir_empty(struct super_block *sb, struct chain_t *p_dir)
+{
+ int i, count = 0;
+ s32 dentries_per_clu;
+ u32 type;
+ struct chain_t clu;
+ struct dentry_t *ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
+ dentries_per_clu = p_fs->dentries_in_root;
+ else
+ dentries_per_clu = p_fs->dentries_per_clu;
+
+ clu.dir = p_dir->dir;
+ clu.size = p_dir->size;
+ clu.flags = p_dir->flags;
+
+ while (clu.dir != CLUSTER_32(~0)) {
+ if (p_fs->dev_ejected)
+ break;
+
+ for (i = 0; i < dentries_per_clu; i++) {
+ ep = get_entry_in_dir(sb, &clu, i, NULL);
+ if (!ep)
+ break;
+
+ type = p_fs->fs_func->get_entry_type(ep);
+
+ if (type == TYPE_UNUSED)
+ return TRUE;
+ if ((type != TYPE_FILE) && (type != TYPE_DIR))
+ continue;
+
+ if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
+ return FALSE;
+
+ if (p_fs->vol_type == EXFAT)
+ return FALSE;
+ if ((p_dir->dir == p_fs->root_dir) || ((++count) > 2))
+ return FALSE;
+ }
+
+ if (p_dir->dir == CLUSTER_32(0))
+ break; /* FAT16 root_dir */
+
+ if (clu.flags == 0x03) {
+ if ((--clu.size) > 0)
+ clu.dir++;
+ else
+ clu.dir = CLUSTER_32(~0);
+ }
+ if (FAT_read(sb, clu.dir, &clu.dir) != 0)
+ break;
+ }
+
+ return TRUE;
+}
+
+/*
+ * Name Conversion Functions
+ */
+
+/* input : dir, uni_name
+ * output : num_of_entry, dos_name(format : aaaaaa~1.bbb)
+ */
+s32 get_num_entries_and_dos_name(struct super_block *sb, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname, s32 *entries,
+ struct dos_name_t *p_dosname)
+{
+ s32 ret, num_entries;
+ bool lossy = false;
+ char **r;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ num_entries = p_fs->fs_func->calc_num_entries(p_uniname);
+ if (num_entries == 0)
+ return FFS_INVALIDPATH;
+
+ if (p_fs->vol_type != EXFAT) {
+ nls_uniname_to_dosname(sb, p_dosname, p_uniname, &lossy);
+
+ if (lossy) {
+ ret = fat_generate_dos_name(sb, p_dir, p_dosname);
+ if (ret)
+ return ret;
+ } else {
+ for (r = reserved_names; *r; r++) {
+ if (!strncmp((void *)p_dosname->name, *r, 8))
+ return FFS_INVALIDPATH;
+ }
+
+ if (p_dosname->name_case != 0xFF)
+ num_entries = 1;
+ }
+
+ if (num_entries > 1)
+ p_dosname->name_case = 0x0;
+ }
+
+ *entries = num_entries;
+
+ return FFS_SUCCESS;
+}
+
+void get_uni_name_from_dos_entry(struct super_block *sb,
+ struct dos_dentry_t *ep,
+ struct uni_name_t *p_uniname, u8 mode)
+{
+ struct dos_name_t dos_name;
+
+ if (mode == 0x0)
+ dos_name.name_case = 0x0;
+ else
+ dos_name.name_case = ep->lcase;
+
+ memcpy(dos_name.name, ep->name, DOS_NAME_LENGTH);
+ nls_dosname_to_uniname(sb, p_uniname, &dos_name);
+}
+
+void fat_get_uni_name_from_ext_entry(struct super_block *sb,
+ struct chain_t *p_dir, s32 entry,
+ u16 *uniname)
+{
+ int i;
+ struct ext_dentry_t *ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ for (entry--, i = 1; entry >= 0; entry--, i++) {
+ ep = (struct ext_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
+ NULL);
+ if (!ep)
+ return;
+
+ if (p_fs->fs_func->get_entry_type((struct dentry_t *)ep) ==
+ TYPE_EXTEND) {
+ extract_uni_name_from_ext_entry(ep, uniname, i);
+ if (ep->order > 0x40)
+ return;
+ } else {
+ return;
+ }
+
+ uniname += 13;
+ }
+}
+
+void exfat_get_uni_name_from_ext_entry(struct super_block *sb,
+ struct chain_t *p_dir, s32 entry,
+ u16 *uniname)
+{
+ int i;
+ struct dentry_t *ep;
+ struct entry_set_cache_t *es;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ es = get_entry_set_in_dir(sb, p_dir, entry, ES_ALL_ENTRIES, &ep);
+ if (es == NULL || es->num_entries < 3) {
+ if (es)
+ release_entry_set(es);
+ return;
+ }
+
+ ep += 2;
+
+ /*
+ * First entry : file entry
+ * Second entry : stream-extension entry
+ * Third entry : first file-name entry
+ * So, the index of first file-name dentry should start from 2.
+ */
+ for (i = 2; i < es->num_entries; i++, ep++) {
+ if (p_fs->fs_func->get_entry_type(ep) == TYPE_EXTEND)
+ extract_uni_name_from_name_entry((struct name_dentry_t *)
+ ep, uniname, i);
+ else
+ goto out;
+ uniname += 15;
+ }
+
+out:
+ release_entry_set(es);
+}
+
+s32 extract_uni_name_from_ext_entry(struct ext_dentry_t *ep, u16 *uniname,
+ s32 order)
+{
+ int i, len = 0;
+
+ for (i = 0; i < 10; i += 2) {
+ *uniname = GET16(ep->unicode_0_4 + i);
+ if (*uniname == 0x0)
+ return len;
+ uniname++;
+ len++;
+ }
+
+ if (order < 20) {
+ for (i = 0; i < 12; i += 2) {
+ *uniname = GET16_A(ep->unicode_5_10 + i);
+ if (*uniname == 0x0)
+ return len;
+ uniname++;
+ len++;
+ }
+ } else {
+ for (i = 0; i < 8; i += 2) {
+ *uniname = GET16_A(ep->unicode_5_10 + i);
+ if (*uniname == 0x0)
+ return len;
+ uniname++;
+ len++;
+ }
+ *uniname = 0x0; /* uniname[MAX_NAME_LENGTH-1] */
+ return len;
+ }
+
+ for (i = 0; i < 4; i += 2) {
+ *uniname = GET16_A(ep->unicode_11_12 + i);
+ if (*uniname == 0x0)
+ return len;
+ uniname++;
+ len++;
+ }
+
+ *uniname = 0x0;
+ return len;
+}
+
+s32 extract_uni_name_from_name_entry(struct name_dentry_t *ep, u16 *uniname,
+ s32 order)
+{
+ int i, len = 0;
+
+ for (i = 0; i < 30; i += 2) {
+ *uniname = GET16_A(ep->unicode_0_14 + i);
+ if (*uniname == 0x0)
+ return len;
+ uniname++;
+ len++;
+ }
+
+ *uniname = 0x0;
+ return len;
+}
+
+s32 fat_generate_dos_name(struct super_block *sb, struct chain_t *p_dir,
+ struct dos_name_t *p_dosname)
+{
+ int i, j, count = 0, count_begin = FALSE;
+ s32 dentries_per_clu;
+ u32 type;
+ u8 bmap[128/* 1 ~ 1023 */];
+ struct chain_t clu;
+ struct dos_dentry_t *ep;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ memset(bmap, 0, sizeof(bmap));
+ exfat_bitmap_set(bmap, 0);
+
+ if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
+ dentries_per_clu = p_fs->dentries_in_root;
+ else
+ dentries_per_clu = p_fs->dentries_per_clu;
+
+ clu.dir = p_dir->dir;
+ clu.flags = p_dir->flags;
+
+ while (clu.dir != CLUSTER_32(~0)) {
+ if (p_fs->dev_ejected)
+ break;
+
+ for (i = 0; i < dentries_per_clu; i++) {
+ ep = (struct dos_dentry_t *)get_entry_in_dir(sb, &clu,
+ i, NULL);
+ if (!ep)
+ return FFS_MEDIAERR;
+
+ type = p_fs->fs_func->get_entry_type((struct dentry_t *)
+ ep);
+
+ if (type == TYPE_UNUSED)
+ break;
+ if ((type != TYPE_FILE) && (type != TYPE_DIR))
+ continue;
+
+ count = 0;
+ count_begin = FALSE;
+
+ for (j = 0; j < 8; j++) {
+ if (ep->name[j] == ' ')
+ break;
+
+ if (ep->name[j] == '~') {
+ count_begin = TRUE;
+ } else if (count_begin) {
+ if ((ep->name[j] >= '0') &&
+ (ep->name[j] <= '9')) {
+ count = count * 10 +
+ (ep->name[j] - '0');
+ } else {
+ count = 0;
+ count_begin = FALSE;
+ }
+ }
+ }
+
+ if ((count > 0) && (count < 1024))
+ exfat_bitmap_set(bmap, count);
+ }
+
+ if (p_dir->dir == CLUSTER_32(0))
+ break; /* FAT16 root_dir */
+
+ if (FAT_read(sb, clu.dir, &clu.dir) != 0)
+ return FFS_MEDIAERR;
+ }
+
+ count = 0;
+ for (i = 0; i < 128; i++) {
+ if (bmap[i] != 0xFF) {
+ for (j = 0; j < 8; j++) {
+ if (exfat_bitmap_test(&bmap[i], j) == 0) {
+ count = (i << 3) + j;
+ break;
+ }
+ }
+ if (count != 0)
+ break;
+ }
+ }
+
+ if ((count == 0) || (count >= 1024))
+ return FFS_FILEEXIST;
+ fat_attach_count_to_dos_name(p_dosname->name, count);
+
+ /* Now dos_name has DOS~????.EXT */
+ return FFS_SUCCESS;
+}
+
+void fat_attach_count_to_dos_name(u8 *dosname, s32 count)
+{
+ int i, j, length;
+ char str_count[6];
+
+ snprintf(str_count, sizeof(str_count), "~%d", count);
+ length = strlen(str_count);
+
+ i = 0;
+ j = 0;
+ while (j <= (8 - length)) {
+ i = j;
+ if (dosname[j] == ' ')
+ break;
+ if (dosname[j] & 0x80)
+ j += 2;
+ else
+ j++;
+ }
+
+ for (j = 0; j < length; i++, j++)
+ dosname[i] = (u8)str_count[j];
+
+ if (i == 7)
+ dosname[7] = ' ';
+}
+
+s32 fat_calc_num_entries(struct uni_name_t *p_uniname)
+{
+ s32 len;
+
+ len = p_uniname->name_len;
+ if (len == 0)
+ return 0;
+
+ /* 1 dos name entry + extended entries */
+ return (len - 1) / 13 + 2;
+}
+
+s32 exfat_calc_num_entries(struct uni_name_t *p_uniname)
+{
+ s32 len;
+
+ len = p_uniname->name_len;
+ if (len == 0)
+ return 0;
+
+ /* 1 file entry + 1 stream entry + name entries */
+ return (len - 1) / 15 + 3;
+}
+
+u8 calc_checksum_1byte(void *data, s32 len, u8 chksum)
+{
+ int i;
+ u8 *c = (u8 *)data;
+
+ for (i = 0; i < len; i++, c++)
+ chksum = (((chksum & 1) << 7) | ((chksum & 0xFE) >> 1)) + *c;
+
+ return chksum;
+}
+
+u16 calc_checksum_2byte(void *data, s32 len, u16 chksum, s32 type)
+{
+ int i;
+ u8 *c = (u8 *)data;
+
+ switch (type) {
+ case CS_DIR_ENTRY:
+ for (i = 0; i < len; i++, c++) {
+ if ((i == 2) || (i == 3))
+ continue;
+ chksum = (((chksum & 1) << 15) |
+ ((chksum & 0xFFFE) >> 1)) + (u16)*c;
+ }
+ break;
+ default
+ :
+ for (i = 0; i < len; i++, c++)
+ chksum = (((chksum & 1) << 15) |
+ ((chksum & 0xFFFE) >> 1)) + (u16)*c;
+ }
+
+ return chksum;
+}
+
+u32 calc_checksum_4byte(void *data, s32 len, u32 chksum, s32 type)
+{
+ int i;
+ u8 *c = (u8 *)data;
+
+ switch (type) {
+ case CS_PBR_SECTOR:
+ for (i = 0; i < len; i++, c++) {
+ if ((i == 106) || (i == 107) || (i == 112))
+ continue;
+ chksum = (((chksum & 1) << 31) |
+ ((chksum & 0xFFFFFFFE) >> 1)) + (u32)*c;
+ }
+ break;
+ default
+ :
+ for (i = 0; i < len; i++, c++)
+ chksum = (((chksum & 1) << 31) |
+ ((chksum & 0xFFFFFFFE) >> 1)) + (u32)*c;
+ }
+
+ return chksum;
+}
+
+/*
+ * Name Resolution Functions
+ */
+
+/* return values of resolve_path()
+ * > 0 : return the length of the path
+ * < 0 : return error
+ */
+s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname)
+{
+ bool lossy = false;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct file_id_t *fid = &(EXFAT_I(inode)->fid);
+
+ if (strlen(path) >= (MAX_NAME_LENGTH * MAX_CHARSET_SIZE))
+ return FFS_INVALIDPATH;
+
+ strcpy(name_buf, path);
+
+ nls_cstring_to_uniname(sb, p_uniname, name_buf, &lossy);
+ if (lossy)
+ return FFS_INVALIDPATH;
+
+ fid->size = i_size_read(inode);
+
+ p_dir->dir = fid->start_clu;
+ p_dir->size = (s32)(fid->size >> p_fs->cluster_size_bits);
+ p_dir->flags = fid->flags;
+
+ return FFS_SUCCESS;
+}
+
+/*
+ * File Operation Functions
+ */
+static struct fs_func fat_fs_func = {
+ .alloc_cluster = fat_alloc_cluster,
+ .free_cluster = fat_free_cluster,
+ .count_used_clusters = fat_count_used_clusters,
+
+ .init_dir_entry = fat_init_dir_entry,
+ .init_ext_entry = fat_init_ext_entry,
+ .find_dir_entry = fat_find_dir_entry,
+ .delete_dir_entry = fat_delete_dir_entry,
+ .get_uni_name_from_ext_entry = fat_get_uni_name_from_ext_entry,
+ .count_ext_entries = fat_count_ext_entries,
+ .calc_num_entries = fat_calc_num_entries,
+
+ .get_entry_type = fat_get_entry_type,
+ .set_entry_type = fat_set_entry_type,
+ .get_entry_attr = fat_get_entry_attr,
+ .set_entry_attr = fat_set_entry_attr,
+ .get_entry_flag = fat_get_entry_flag,
+ .set_entry_flag = fat_set_entry_flag,
+ .get_entry_clu0 = fat_get_entry_clu0,
+ .set_entry_clu0 = fat_set_entry_clu0,
+ .get_entry_size = fat_get_entry_size,
+ .set_entry_size = fat_set_entry_size,
+ .get_entry_time = fat_get_entry_time,
+ .set_entry_time = fat_set_entry_time,
+};
+
+s32 fat16_mount(struct super_block *sb, struct pbr_sector_t *p_pbr)
+{
+ s32 num_reserved, num_root_sectors;
+ struct bpb16_t *p_bpb = (struct bpb16_t *)p_pbr->bpb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ if (p_bpb->num_fats == 0)
+ return FFS_FORMATERR;
+
+ num_root_sectors = GET16(p_bpb->num_root_entries) << DENTRY_SIZE_BITS;
+ num_root_sectors = ((num_root_sectors - 1) >>
+ p_bd->sector_size_bits) + 1;
+
+ p_fs->sectors_per_clu = p_bpb->sectors_per_clu;
+ p_fs->sectors_per_clu_bits = ilog2(p_bpb->sectors_per_clu);
+ p_fs->cluster_size_bits = p_fs->sectors_per_clu_bits +
+ p_bd->sector_size_bits;
+ p_fs->cluster_size = 1 << p_fs->cluster_size_bits;
+
+ p_fs->num_FAT_sectors = GET16(p_bpb->num_fat_sectors);
+
+ p_fs->FAT1_start_sector = p_fs->PBR_sector + GET16(p_bpb->num_reserved);
+ if (p_bpb->num_fats == 1)
+ p_fs->FAT2_start_sector = p_fs->FAT1_start_sector;
+ else
+ p_fs->FAT2_start_sector = p_fs->FAT1_start_sector +
+ p_fs->num_FAT_sectors;
+
+ p_fs->root_start_sector = p_fs->FAT2_start_sector +
+ p_fs->num_FAT_sectors;
+ p_fs->data_start_sector = p_fs->root_start_sector + num_root_sectors;
+
+ p_fs->num_sectors = GET16(p_bpb->num_sectors);
+ if (p_fs->num_sectors == 0)
+ p_fs->num_sectors = GET32(p_bpb->num_huge_sectors);
+
+ num_reserved = p_fs->data_start_sector - p_fs->PBR_sector;
+ p_fs->num_clusters = ((p_fs->num_sectors - num_reserved) >>
+ p_fs->sectors_per_clu_bits) + 2;
+ /* because the cluster index starts with 2 */
+
+ if (p_fs->num_clusters < FAT12_THRESHOLD)
+ p_fs->vol_type = FAT12;
+ else
+ p_fs->vol_type = FAT16;
+ p_fs->vol_id = GET32(p_bpb->vol_serial);
+
+ p_fs->root_dir = 0;
+ p_fs->dentries_in_root = GET16(p_bpb->num_root_entries);
+ p_fs->dentries_per_clu = 1 << (p_fs->cluster_size_bits -
+ DENTRY_SIZE_BITS);
+
+ p_fs->vol_flag = VOL_CLEAN;
+ p_fs->clu_srch_ptr = 2;
+ p_fs->used_clusters = (u32)~0;
+
+ p_fs->fs_func = &fat_fs_func;
+
+ return FFS_SUCCESS;
+}
+
+s32 fat32_mount(struct super_block *sb, struct pbr_sector_t *p_pbr)
+{
+ s32 num_reserved;
+ struct bpb32_t *p_bpb = (struct bpb32_t *)p_pbr->bpb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ if (p_bpb->num_fats == 0)
+ return FFS_FORMATERR;
+
+ p_fs->sectors_per_clu = p_bpb->sectors_per_clu;
+ p_fs->sectors_per_clu_bits = ilog2(p_bpb->sectors_per_clu);
+ p_fs->cluster_size_bits = p_fs->sectors_per_clu_bits +
+ p_bd->sector_size_bits;
+ p_fs->cluster_size = 1 << p_fs->cluster_size_bits;
+
+ p_fs->num_FAT_sectors = GET32(p_bpb->num_fat32_sectors);
+
+ p_fs->FAT1_start_sector = p_fs->PBR_sector + GET16(p_bpb->num_reserved);
+ if (p_bpb->num_fats == 1)
+ p_fs->FAT2_start_sector = p_fs->FAT1_start_sector;
+ else
+ p_fs->FAT2_start_sector = p_fs->FAT1_start_sector +
+ p_fs->num_FAT_sectors;
+
+ p_fs->root_start_sector = p_fs->FAT2_start_sector +
+ p_fs->num_FAT_sectors;
+ p_fs->data_start_sector = p_fs->root_start_sector;
+
+ p_fs->num_sectors = GET32(p_bpb->num_huge_sectors);
+ num_reserved = p_fs->data_start_sector - p_fs->PBR_sector;
+
+ p_fs->num_clusters = ((p_fs->num_sectors - num_reserved) >>
+ p_fs->sectors_per_clu_bits) + 2;
+ /* because the cluster index starts with 2 */
+
+ p_fs->vol_type = FAT32;
+ p_fs->vol_id = GET32(p_bpb->vol_serial);
+
+ p_fs->root_dir = GET32(p_bpb->root_cluster);
+ p_fs->dentries_in_root = 0;
+ p_fs->dentries_per_clu = 1 << (p_fs->cluster_size_bits -
+ DENTRY_SIZE_BITS);
+
+ p_fs->vol_flag = VOL_CLEAN;
+ p_fs->clu_srch_ptr = 2;
+ p_fs->used_clusters = (u32)~0;
+
+ p_fs->fs_func = &fat_fs_func;
+
+ return FFS_SUCCESS;
+}
+
+static struct fs_func exfat_fs_func = {
+ .alloc_cluster = exfat_alloc_cluster,
+ .free_cluster = exfat_free_cluster,
+ .count_used_clusters = exfat_count_used_clusters,
+
+ .init_dir_entry = exfat_init_dir_entry,
+ .init_ext_entry = exfat_init_ext_entry,
+ .find_dir_entry = exfat_find_dir_entry,
+ .delete_dir_entry = exfat_delete_dir_entry,
+ .get_uni_name_from_ext_entry = exfat_get_uni_name_from_ext_entry,
+ .count_ext_entries = exfat_count_ext_entries,
+ .calc_num_entries = exfat_calc_num_entries,
+
+ .get_entry_type = exfat_get_entry_type,
+ .set_entry_type = exfat_set_entry_type,
+ .get_entry_attr = exfat_get_entry_attr,
+ .set_entry_attr = exfat_set_entry_attr,
+ .get_entry_flag = exfat_get_entry_flag,
+ .set_entry_flag = exfat_set_entry_flag,
+ .get_entry_clu0 = exfat_get_entry_clu0,
+ .set_entry_clu0 = exfat_set_entry_clu0,
+ .get_entry_size = exfat_get_entry_size,
+ .set_entry_size = exfat_set_entry_size,
+ .get_entry_time = exfat_get_entry_time,
+ .set_entry_time = exfat_set_entry_time,
+};
+
+s32 exfat_mount(struct super_block *sb, struct pbr_sector_t *p_pbr)
+{
+ struct bpbex_t *p_bpb = (struct bpbex_t *)p_pbr->bpb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ if (p_bpb->num_fats == 0)
+ return FFS_FORMATERR;
+
+ p_fs->sectors_per_clu = 1 << p_bpb->sectors_per_clu_bits;
+ p_fs->sectors_per_clu_bits = p_bpb->sectors_per_clu_bits;
+ p_fs->cluster_size_bits = p_fs->sectors_per_clu_bits +
+ p_bd->sector_size_bits;
+ p_fs->cluster_size = 1 << p_fs->cluster_size_bits;
+
+ p_fs->num_FAT_sectors = GET32(p_bpb->fat_length);
+
+ p_fs->FAT1_start_sector = p_fs->PBR_sector + GET32(p_bpb->fat_offset);
+ if (p_bpb->num_fats == 1)
+ p_fs->FAT2_start_sector = p_fs->FAT1_start_sector;
+ else
+ p_fs->FAT2_start_sector = p_fs->FAT1_start_sector +
+ p_fs->num_FAT_sectors;
+
+ p_fs->root_start_sector = p_fs->PBR_sector + GET32(p_bpb->clu_offset);
+ p_fs->data_start_sector = p_fs->root_start_sector;
+
+ p_fs->num_sectors = GET64(p_bpb->vol_length);
+ p_fs->num_clusters = GET32(p_bpb->clu_count) + 2;
+ /* because the cluster index starts with 2 */
+
+ p_fs->vol_type = EXFAT;
+ p_fs->vol_id = GET32(p_bpb->vol_serial);
+
+ p_fs->root_dir = GET32(p_bpb->root_cluster);
+ p_fs->dentries_in_root = 0;
+ p_fs->dentries_per_clu = 1 << (p_fs->cluster_size_bits -
+ DENTRY_SIZE_BITS);
+
+ p_fs->vol_flag = (u32)GET16(p_bpb->vol_flags);
+ p_fs->clu_srch_ptr = 2;
+ p_fs->used_clusters = (u32)~0;
+
+ p_fs->fs_func = &exfat_fs_func;
+
+ return FFS_SUCCESS;
+}
+
+s32 create_dir(struct inode *inode, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname, struct file_id_t *fid)
+{
+ s32 ret, dentry, num_entries;
+ u64 size;
+ struct chain_t clu;
+ struct dos_name_t dos_name, dot_name;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct fs_func *fs_func = p_fs->fs_func;
+
+ ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname, &num_entries,
+ &dos_name);
+ if (ret)
+ return ret;
+
+ /* find_empty_entry must be called before alloc_cluster */
+ dentry = find_empty_entry(inode, p_dir, num_entries);
+ if (dentry < 0)
+ return FFS_FULL;
+
+ clu.dir = CLUSTER_32(~0);
+ clu.size = 0;
+ clu.flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
+
+ /* (1) allocate a cluster */
+ ret = fs_func->alloc_cluster(sb, 1, &clu);
+ if (ret < 0)
+ return FFS_MEDIAERR;
+ else if (ret == 0)
+ return FFS_FULL;
+
+ ret = clear_cluster(sb, clu.dir);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ if (p_fs->vol_type == EXFAT) {
+ size = p_fs->cluster_size;
+ } else {
+ size = 0;
+
+ /* initialize the . and .. entry
+ * Information for . points to itself
+ * Information for .. points to parent dir
+ */
+
+ dot_name.name_case = 0x0;
+ memcpy(dot_name.name, DOS_CUR_DIR_NAME, DOS_NAME_LENGTH);
+
+ ret = fs_func->init_dir_entry(sb, &clu, 0, TYPE_DIR, clu.dir,
+ 0);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ ret = fs_func->init_ext_entry(sb, &clu, 0, 1, NULL, &dot_name);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ memcpy(dot_name.name, DOS_PAR_DIR_NAME, DOS_NAME_LENGTH);
+
+ if (p_dir->dir == p_fs->root_dir)
+ ret = fs_func->init_dir_entry(sb, &clu, 1, TYPE_DIR,
+ CLUSTER_32(0), 0);
+ else
+ ret = fs_func->init_dir_entry(sb, &clu, 1, TYPE_DIR,
+ p_dir->dir, 0);
+
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ ret = p_fs->fs_func->init_ext_entry(sb, &clu, 1, 1, NULL,
+ &dot_name);
+ if (ret != FFS_SUCCESS)
+ return ret;
+ }
+
+ /* (2) update the directory entry */
+ /* make sub-dir entry in parent directory */
+ ret = fs_func->init_dir_entry(sb, p_dir, dentry, TYPE_DIR, clu.dir,
+ size);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ ret = fs_func->init_ext_entry(sb, p_dir, dentry, num_entries, p_uniname,
+ &dos_name);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ fid->dir.dir = p_dir->dir;
+ fid->dir.size = p_dir->size;
+ fid->dir.flags = p_dir->flags;
+ fid->entry = dentry;
+
+ fid->attr = ATTR_SUBDIR;
+ fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
+ fid->size = size;
+ fid->start_clu = clu.dir;
+
+ fid->type = TYPE_DIR;
+ fid->rwoffset = 0;
+ fid->hint_last_off = -1;
+
+ return FFS_SUCCESS;
+}
+
+s32 create_file(struct inode *inode, struct chain_t *p_dir,
+ struct uni_name_t *p_uniname, u8 mode, struct file_id_t *fid)
+{
+ s32 ret, dentry, num_entries;
+ struct dos_name_t dos_name;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct fs_func *fs_func = p_fs->fs_func;
+
+ ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname, &num_entries,
+ &dos_name);
+ if (ret)
+ return ret;
+
+ /* find_empty_entry must be called before alloc_cluster() */
+ dentry = find_empty_entry(inode, p_dir, num_entries);
+ if (dentry < 0)
+ return FFS_FULL;
+
+ /* (1) update the directory entry */
+ /* fill the dos name directory entry information of the created file.
+ * the first cluster is not determined yet. (0)
+ */
+ ret = fs_func->init_dir_entry(sb, p_dir, dentry, TYPE_FILE | mode,
+ CLUSTER_32(0), 0);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ ret = fs_func->init_ext_entry(sb, p_dir, dentry, num_entries, p_uniname,
+ &dos_name);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ fid->dir.dir = p_dir->dir;
+ fid->dir.size = p_dir->size;
+ fid->dir.flags = p_dir->flags;
+ fid->entry = dentry;
+
+ fid->attr = ATTR_ARCHIVE | mode;
+ fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
+ fid->size = 0;
+ fid->start_clu = CLUSTER_32(~0);
+
+ fid->type = TYPE_FILE;
+ fid->rwoffset = 0;
+ fid->hint_last_off = -1;
+
+ return FFS_SUCCESS;
+}
+
+void remove_file(struct inode *inode, struct chain_t *p_dir, s32 entry)
+{
+ s32 num_entries;
+ sector_t sector;
+ struct dentry_t *ep;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct fs_func *fs_func = p_fs->fs_func;
+
+ ep = get_entry_in_dir(sb, p_dir, entry, §or);
+ if (!ep)
+ return;
+
+ buf_lock(sb, sector);
+
+ /* buf_lock() before call count_ext_entries() */
+ num_entries = fs_func->count_ext_entries(sb, p_dir, entry, ep);
+ if (num_entries < 0) {
+ buf_unlock(sb, sector);
+ return;
+ }
+ num_entries++;
+
+ buf_unlock(sb, sector);
+
+ /* (1) update the directory entry */
+ fs_func->delete_dir_entry(sb, p_dir, entry, 0, num_entries);
+}
+
+s32 rename_file(struct inode *inode, struct chain_t *p_dir, s32 oldentry,
+ struct uni_name_t *p_uniname, struct file_id_t *fid)
+{
+ s32 ret, newentry = -1, num_old_entries, num_new_entries;
+ sector_t sector_old, sector_new;
+ struct dos_name_t dos_name;
+ struct dentry_t *epold, *epnew;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct fs_func *fs_func = p_fs->fs_func;
+
+ epold = get_entry_in_dir(sb, p_dir, oldentry, §or_old);
+ if (!epold)
+ return FFS_MEDIAERR;
+
+ buf_lock(sb, sector_old);
+
+ /* buf_lock() before call count_ext_entries() */
+ num_old_entries = fs_func->count_ext_entries(sb, p_dir, oldentry,
+ epold);
+ if (num_old_entries < 0) {
+ buf_unlock(sb, sector_old);
+ return FFS_MEDIAERR;
+ }
+ num_old_entries++;
+
+ ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname,
+ &num_new_entries, &dos_name);
+ if (ret) {
+ buf_unlock(sb, sector_old);
+ return ret;
+ }
+
+ if (num_old_entries < num_new_entries) {
+ newentry = find_empty_entry(inode, p_dir, num_new_entries);
+ if (newentry < 0) {
+ buf_unlock(sb, sector_old);
+ return FFS_FULL;
+ }
+
+ epnew = get_entry_in_dir(sb, p_dir, newentry, §or_new);
+ if (!epnew) {
+ buf_unlock(sb, sector_old);
+ return FFS_MEDIAERR;
+ }
+
+ memcpy((void *)epnew, (void *)epold, DENTRY_SIZE);
+ if (fs_func->get_entry_type(epnew) == TYPE_FILE) {
+ fs_func->set_entry_attr(epnew,
+ fs_func->get_entry_attr(epnew) |
+ ATTR_ARCHIVE);
+ fid->attr |= ATTR_ARCHIVE;
+ }
+ buf_modify(sb, sector_new);
+ buf_unlock(sb, sector_old);
+
+ if (p_fs->vol_type == EXFAT) {
+ epold = get_entry_in_dir(sb, p_dir, oldentry + 1,
+ §or_old);
+ buf_lock(sb, sector_old);
+ epnew = get_entry_in_dir(sb, p_dir, newentry + 1,
+ §or_new);
+
+ if (!epold || !epnew) {
+ buf_unlock(sb, sector_old);
+ return FFS_MEDIAERR;
+ }
+
+ memcpy((void *)epnew, (void *)epold, DENTRY_SIZE);
+ buf_modify(sb, sector_new);
+ buf_unlock(sb, sector_old);
+ }
+
+ ret = fs_func->init_ext_entry(sb, p_dir, newentry,
+ num_new_entries, p_uniname,
+ &dos_name);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ fs_func->delete_dir_entry(sb, p_dir, oldentry, 0,
+ num_old_entries);
+ fid->entry = newentry;
+ } else {
+ if (fs_func->get_entry_type(epold) == TYPE_FILE) {
+ fs_func->set_entry_attr(epold,
+ fs_func->get_entry_attr(epold) |
+ ATTR_ARCHIVE);
+ fid->attr |= ATTR_ARCHIVE;
+ }
+ buf_modify(sb, sector_old);
+ buf_unlock(sb, sector_old);
+
+ ret = fs_func->init_ext_entry(sb, p_dir, oldentry,
+ num_new_entries, p_uniname,
+ &dos_name);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ fs_func->delete_dir_entry(sb, p_dir, oldentry, num_new_entries,
+ num_old_entries);
+ }
+
+ return FFS_SUCCESS;
+}
+
+s32 move_file(struct inode *inode, struct chain_t *p_olddir, s32 oldentry,
+ struct chain_t *p_newdir, struct uni_name_t *p_uniname,
+ struct file_id_t *fid)
+{
+ s32 ret, newentry, num_new_entries, num_old_entries;
+ sector_t sector_mov, sector_new;
+ struct chain_t clu;
+ struct dos_name_t dos_name;
+ struct dentry_t *epmov, *epnew;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct fs_func *fs_func = p_fs->fs_func;
+
+ epmov = get_entry_in_dir(sb, p_olddir, oldentry, §or_mov);
+ if (!epmov)
+ return FFS_MEDIAERR;
+
+ /* check if the source and target directory is the same */
+ if (fs_func->get_entry_type(epmov) == TYPE_DIR &&
+ fs_func->get_entry_clu0(epmov) == p_newdir->dir)
+ return FFS_INVALIDPATH;
+
+ buf_lock(sb, sector_mov);
+
+ /* buf_lock() before call count_ext_entries() */
+ num_old_entries = fs_func->count_ext_entries(sb, p_olddir, oldentry,
+ epmov);
+ if (num_old_entries < 0) {
+ buf_unlock(sb, sector_mov);
+ return FFS_MEDIAERR;
+ }
+ num_old_entries++;
+
+ ret = get_num_entries_and_dos_name(sb, p_newdir, p_uniname,
+ &num_new_entries, &dos_name);
+ if (ret) {
+ buf_unlock(sb, sector_mov);
+ return ret;
+ }
+
+ newentry = find_empty_entry(inode, p_newdir, num_new_entries);
+ if (newentry < 0) {
+ buf_unlock(sb, sector_mov);
+ return FFS_FULL;
+ }
+
+ epnew = get_entry_in_dir(sb, p_newdir, newentry, §or_new);
+ if (!epnew) {
+ buf_unlock(sb, sector_mov);
+ return FFS_MEDIAERR;
+ }
+
+ memcpy((void *)epnew, (void *)epmov, DENTRY_SIZE);
+ if (fs_func->get_entry_type(epnew) == TYPE_FILE) {
+ fs_func->set_entry_attr(epnew, fs_func->get_entry_attr(epnew) |
+ ATTR_ARCHIVE);
+ fid->attr |= ATTR_ARCHIVE;
+ }
+ buf_modify(sb, sector_new);
+ buf_unlock(sb, sector_mov);
+
+ if (p_fs->vol_type == EXFAT) {
+ epmov = get_entry_in_dir(sb, p_olddir, oldentry + 1,
+ §or_mov);
+ buf_lock(sb, sector_mov);
+ epnew = get_entry_in_dir(sb, p_newdir, newentry + 1,
+ §or_new);
+ if (!epmov || !epnew) {
+ buf_unlock(sb, sector_mov);
+ return FFS_MEDIAERR;
+ }
+
+ memcpy((void *)epnew, (void *)epmov, DENTRY_SIZE);
+ buf_modify(sb, sector_new);
+ buf_unlock(sb, sector_mov);
+ } else if (fs_func->get_entry_type(epnew) == TYPE_DIR) {
+ /* change ".." pointer to new parent dir */
+ clu.dir = fs_func->get_entry_clu0(epnew);
+ clu.flags = 0x01;
+
+ epnew = get_entry_in_dir(sb, &clu, 1, §or_new);
+ if (!epnew)
+ return FFS_MEDIAERR;
+
+ if (p_newdir->dir == p_fs->root_dir)
+ fs_func->set_entry_clu0(epnew, CLUSTER_32(0));
+ else
+ fs_func->set_entry_clu0(epnew, p_newdir->dir);
+ buf_modify(sb, sector_new);
+ }
+
+ ret = fs_func->init_ext_entry(sb, p_newdir, newentry, num_new_entries,
+ p_uniname, &dos_name);
+ if (ret != FFS_SUCCESS)
+ return ret;
+
+ fs_func->delete_dir_entry(sb, p_olddir, oldentry, 0, num_old_entries);
+
+ fid->dir.dir = p_newdir->dir;
+ fid->dir.size = p_newdir->size;
+ fid->dir.flags = p_newdir->flags;
+
+ fid->entry = newentry;
+
+ return FFS_SUCCESS;
+}
+
+/*
+ * Sector Read/Write Functions
+ */
+
+int sector_read(struct super_block *sb, sector_t sec, struct buffer_head **bh,
+ bool read)
+{
+ s32 ret = FFS_MEDIAERR;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if ((sec >= (p_fs->PBR_sector + p_fs->num_sectors)) &&
+ (p_fs->num_sectors > 0)) {
+ pr_err("[EXFAT] %s: out of range error! (sec = %llu)\n",
+ __func__, (unsigned long long)sec);
+ fs_error(sb);
+ return ret;
+ }
+
+ if (!p_fs->dev_ejected) {
+ ret = bdev_read(sb, sec, bh, 1, read);
+ if (ret != FFS_SUCCESS)
+ p_fs->dev_ejected = TRUE;
+ }
+
+ return ret;
+}
+
+int sector_write(struct super_block *sb, sector_t sec, struct buffer_head *bh,
+ bool sync)
+{
+ s32 ret = FFS_MEDIAERR;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if (sec >= (p_fs->PBR_sector + p_fs->num_sectors) &&
+ (p_fs->num_sectors > 0)) {
+ pr_err("[EXFAT] %s: out of range error! (sec = %llu)\n",
+ __func__, (unsigned long long)sec);
+ fs_error(sb);
+ return ret;
+ }
+
+ if (!bh) {
+ pr_err("[EXFAT] %s: bh is NULL!\n", __func__);
+ fs_error(sb);
+ return ret;
+ }
+
+ if (!p_fs->dev_ejected) {
+ ret = bdev_write(sb, sec, bh, 1, sync);
+ if (ret != FFS_SUCCESS)
+ p_fs->dev_ejected = TRUE;
+ }
+
+ return ret;
+}
+
+int multi_sector_read(struct super_block *sb, sector_t sec,
+ struct buffer_head **bh, s32 num_secs, bool read)
+{
+ s32 ret = FFS_MEDIAERR;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if (((sec + num_secs) > (p_fs->PBR_sector + p_fs->num_sectors)) &&
+ (p_fs->num_sectors > 0)) {
+ pr_err("[EXFAT] %s: out of range error! (sec = %llu, num_secs = %d)\n",
+ __func__, (unsigned long long)sec, num_secs);
+ fs_error(sb);
+ return ret;
+ }
+
+ if (!p_fs->dev_ejected) {
+ ret = bdev_read(sb, sec, bh, num_secs, read);
+ if (ret != FFS_SUCCESS)
+ p_fs->dev_ejected = TRUE;
+ }
+
+ return ret;
+}
+
+int multi_sector_write(struct super_block *sb, sector_t sec,
+ struct buffer_head *bh, s32 num_secs, bool sync)
+{
+ s32 ret = FFS_MEDIAERR;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if ((sec + num_secs) > (p_fs->PBR_sector + p_fs->num_sectors) &&
+ (p_fs->num_sectors > 0)) {
+ pr_err("[EXFAT] %s: out of range error! (sec = %llu, num_secs = %d)\n",
+ __func__, (unsigned long long)sec, num_secs);
+ fs_error(sb);
+ return ret;
+ }
+ if (!bh) {
+ pr_err("[EXFAT] %s: bh is NULL!\n", __func__);
+ fs_error(sb);
+ return ret;
+ }
+
+ if (!p_fs->dev_ejected) {
+ ret = bdev_write(sb, sec, bh, num_secs, sync);
+ if (ret != FFS_SUCCESS)
+ p_fs->dev_ejected = TRUE;
+ }
+
+ return ret;
+}
diff --git a/drivers/staging/exfat/exfat_nls.c b/drivers/staging/exfat/exfat_nls.c
new file mode 100644
index 000000000000..2ca58616159b
--- /dev/null
+++ b/drivers/staging/exfat/exfat_nls.c
@@ -0,0 +1,404 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ */
+
+#include <linux/string.h>
+#include <linux/nls.h>
+#include "exfat.h"
+
+static u16 bad_dos_chars[] = {
+ /* + , ; = [ ] */
+ 0x002B, 0x002C, 0x003B, 0x003D, 0x005B, 0x005D,
+ 0xFF0B, 0xFF0C, 0xFF1B, 0xFF1D, 0xFF3B, 0xFF3D,
+ 0
+};
+
+static u16 bad_uni_chars[] = {
+ /* " * / : < > ? \ | */
+ 0x0022, 0x002A, 0x002F, 0x003A,
+ 0x003C, 0x003E, 0x003F, 0x005C, 0x007C,
+ 0
+};
+
+static int convert_ch_to_uni(struct nls_table *nls, u16 *uni, u8 *ch,
+ bool *lossy)
+{
+ int len;
+
+ *uni = 0x0;
+
+ if (ch[0] < 0x80) {
+ *uni = (u16)ch[0];
+ return 1;
+ }
+
+ len = nls->char2uni(ch, NLS_MAX_CHARSET_SIZE, uni);
+ if (len < 0) {
+ /* conversion failed */
+ pr_info("%s: fail to use nls\n", __func__);
+ if (lossy)
+ *lossy = true;
+ *uni = (u16)'_';
+ if (!strcmp(nls->charset, "utf8"))
+ return 1;
+ else
+ return 2;
+ }
+
+ return len;
+}
+
+static int convert_uni_to_ch(struct nls_table *nls, u8 *ch, u16 uni,
+ bool *lossy)
+{
+ int len;
+
+ ch[0] = 0x0;
+
+ if (uni < 0x0080) {
+ ch[0] = (u8)uni;
+ return 1;
+ }
+
+ len = nls->uni2char(uni, ch, NLS_MAX_CHARSET_SIZE);
+ if (len < 0) {
+ /* conversion failed */
+ pr_info("%s: fail to use nls\n", __func__);
+ if (lossy)
+ *lossy = true;
+ ch[0] = '_';
+ return 1;
+ }
+
+ return len;
+}
+
+u16 nls_upper(struct super_block *sb, u16 a)
+{
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ if (EXFAT_SB(sb)->options.casesensitive)
+ return a;
+ if (p_fs->vol_utbl && p_fs->vol_utbl[get_col_index(a)])
+ return p_fs->vol_utbl[get_col_index(a)][get_row_index(a)];
+ else
+ return a;
+}
+
+static u16 *nls_wstrchr(u16 *str, u16 wchar)
+{
+ while (*str) {
+ if (*(str++) == wchar)
+ return str;
+ }
+
+ return NULL;
+}
+
+int nls_dosname_cmp(struct super_block *sb, u8 *a, u8 *b)
+{
+ return strncmp(a, b, DOS_NAME_LENGTH);
+}
+
+int nls_uniname_cmp(struct super_block *sb, u16 *a, u16 *b)
+{
+ int i;
+
+ for (i = 0; i < MAX_NAME_LENGTH; i++, a++, b++) {
+ if (nls_upper(sb, *a) != nls_upper(sb, *b))
+ return 1;
+ if (*a == 0x0)
+ return 0;
+ }
+ return 0;
+}
+
+void nls_uniname_to_dosname(struct super_block *sb,
+ struct dos_name_t *p_dosname,
+ struct uni_name_t *p_uniname, bool *p_lossy)
+{
+ int i, j, len;
+ bool lossy = false;
+ u8 buf[MAX_CHARSET_SIZE];
+ u8 lower = 0, upper = 0;
+ u8 *dosname = p_dosname->name;
+ u16 *uniname = p_uniname->name;
+ u16 *p, *last_period;
+ struct nls_table *nls = EXFAT_SB(sb)->nls_disk;
+
+ for (i = 0; i < DOS_NAME_LENGTH; i++)
+ *(dosname + i) = ' ';
+
+ if (!nls_uniname_cmp(sb, uniname, (u16 *)UNI_CUR_DIR_NAME)) {
+ *(dosname) = '.';
+ p_dosname->name_case = 0x0;
+ if (p_lossy)
+ *p_lossy = false;
+ return;
+ }
+
+ if (!nls_uniname_cmp(sb, uniname, (u16 *)UNI_PAR_DIR_NAME)) {
+ *(dosname) = '.';
+ *(dosname + 1) = '.';
+ p_dosname->name_case = 0x0;
+ if (p_lossy)
+ *p_lossy = false;
+ return;
+ }
+
+ /* search for the last embedded period */
+ last_period = NULL;
+ for (p = uniname; *p; p++) {
+ if (*p == (u16)'.')
+ last_period = p;
+ }
+
+ i = 0;
+ while (i < DOS_NAME_LENGTH) {
+ if (i == 8) {
+ if (!last_period)
+ break;
+
+ if (uniname <= last_period) {
+ if (uniname < last_period)
+ lossy = true;
+ uniname = last_period + 1;
+ }
+ }
+
+ if (*uniname == (u16)'\0') {
+ break;
+ } else if (*uniname == (u16)' ') {
+ lossy = true;
+ } else if (*uniname == (u16)'.') {
+ if (uniname < last_period)
+ lossy = true;
+ else
+ i = 8;
+ } else if (nls_wstrchr(bad_dos_chars, *uniname)) {
+ lossy = true;
+ *(dosname + i) = '_';
+ i++;
+ } else {
+ len = convert_uni_to_ch(nls, buf, *uniname, &lossy);
+
+ if (len > 1) {
+ if ((i >= 8) && ((i + len) > DOS_NAME_LENGTH))
+ break;
+
+ if ((i < 8) && ((i + len) > 8)) {
+ i = 8;
+ continue;
+ }
+
+ lower = 0xFF;
+
+ for (j = 0; j < len; j++, i++)
+ *(dosname + i) = *(buf + j);
+ } else { /* len == 1 */
+ if ((*buf >= 'a') && (*buf <= 'z')) {
+ *(dosname + i) = *buf - ('a' - 'A');
+
+ if (i < 8)
+ lower |= 0x08;
+ else
+ lower |= 0x10;
+ } else if ((*buf >= 'A') && (*buf <= 'Z')) {
+ *(dosname + i) = *buf;
+
+ if (i < 8)
+ upper |= 0x08;
+ else
+ upper |= 0x10;
+ } else {
+ *(dosname + i) = *buf;
+ }
+ i++;
+ }
+ }
+
+ uniname++;
+ }
+
+ if (*dosname == 0xE5)
+ *dosname = 0x05;
+
+ if (*uniname != 0x0)
+ lossy = TRUE;
+
+ if (upper & lower)
+ p_dosname->name_case = 0xFF;
+ else
+ p_dosname->name_case = lower;
+
+ if (p_lossy)
+ *p_lossy = lossy;
+}
+
+void nls_dosname_to_uniname(struct super_block *sb,
+ struct uni_name_t *p_uniname,
+ struct dos_name_t *p_dosname)
+{
+ int i = 0, j, n = 0;
+ u8 buf[DOS_NAME_LENGTH + 2];
+ u8 *dosname = p_dosname->name;
+ u16 *uniname = p_uniname->name;
+ struct nls_table *nls = EXFAT_SB(sb)->nls_disk;
+
+ if (*dosname == 0x05) {
+ *buf = 0xE5;
+ i++;
+ n++;
+ }
+
+ for (; i < 8; i++, n++) {
+ if (*(dosname + i) == ' ')
+ break;
+
+ if ((*(dosname + i) >= 'A') && (*(dosname + i) <= 'Z') &&
+ (p_dosname->name_case & 0x08))
+ *(buf + n) = *(dosname + i) + ('a' - 'A');
+ else
+ *(buf + n) = *(dosname + i);
+ }
+ if (*(dosname + 8) != ' ') {
+ *(buf + n) = '.';
+ n++;
+ }
+
+ for (i = 8; i < DOS_NAME_LENGTH; i++, n++) {
+ if (*(dosname + i) == ' ')
+ break;
+
+ if ((*(dosname + i) >= 'A') && (*(dosname + i) <= 'Z') &&
+ (p_dosname->name_case & 0x10))
+ *(buf + n) = *(dosname + i) + ('a' - 'A');
+ else
+ *(buf + n) = *(dosname + i);
+ }
+ *(buf + n) = '\0';
+
+ i = 0;
+ j = 0;
+ while (j < (MAX_NAME_LENGTH - 1)) {
+ if (*(buf + i) == '\0')
+ break;
+
+ i += convert_ch_to_uni(nls, uniname, (buf + i), NULL);
+
+ uniname++;
+ j++;
+ }
+
+ *uniname = (u16)'\0';
+}
+
+void nls_uniname_to_cstring(struct super_block *sb, u8 *p_cstring,
+ struct uni_name_t *p_uniname)
+{
+ int i, j, len;
+ u8 buf[MAX_CHARSET_SIZE];
+ u16 *uniname = p_uniname->name;
+ struct nls_table *nls = EXFAT_SB(sb)->nls_io;
+
+ if (!nls) {
+ len = utf16s_to_utf8s(uniname, MAX_NAME_LENGTH,
+ UTF16_HOST_ENDIAN, p_cstring,
+ MAX_NAME_LENGTH);
+ p_cstring[len] = 0;
+ return;
+ }
+
+ i = 0;
+ while (i < (MAX_NAME_LENGTH - 1)) {
+ if (*uniname == (u16)'\0')
+ break;
+
+ len = convert_uni_to_ch(nls, buf, *uniname, NULL);
+
+ if (len > 1) {
+ for (j = 0; j < len; j++)
+ *p_cstring++ = (char)*(buf + j);
+ } else { /* len == 1 */
+ *p_cstring++ = (char)*buf;
+ }
+
+ uniname++;
+ i++;
+ }
+
+ *p_cstring = '\0';
+}
+
+void nls_cstring_to_uniname(struct super_block *sb,
+ struct uni_name_t *p_uniname, u8 *p_cstring,
+ bool *p_lossy)
+{
+ int i, j;
+ bool lossy = false;
+ u8 *end_of_name;
+ u8 upname[MAX_NAME_LENGTH * 2];
+ u16 *uniname = p_uniname->name;
+ struct nls_table *nls = EXFAT_SB(sb)->nls_io;
+
+ /* strip all trailing spaces */
+ end_of_name = p_cstring + strlen(p_cstring);
+
+ while (*(--end_of_name) == ' ') {
+ if (end_of_name < p_cstring)
+ break;
+ }
+ *(++end_of_name) = '\0';
+
+ if (strcmp(p_cstring, ".") && strcmp(p_cstring, "..")) {
+ /* strip all trailing periods */
+ while (*(--end_of_name) == '.') {
+ if (end_of_name < p_cstring)
+ break;
+ }
+ *(++end_of_name) = '\0';
+ }
+
+ if (*p_cstring == '\0')
+ lossy = true;
+
+ if (!nls) {
+ i = utf8s_to_utf16s(p_cstring, MAX_NAME_LENGTH,
+ UTF16_HOST_ENDIAN, uniname,
+ MAX_NAME_LENGTH);
+ for (j = 0; j < i; j++)
+ SET16_A(upname + j * 2, nls_upper(sb, uniname[j]));
+ uniname[i] = '\0';
+ } else {
+ i = 0;
+ j = 0;
+ while (j < (MAX_NAME_LENGTH - 1)) {
+ if (*(p_cstring + i) == '\0')
+ break;
+
+ i += convert_ch_to_uni(nls, uniname,
+ (u8 *)(p_cstring + i), &lossy);
+
+ if ((*uniname < 0x0020) ||
+ nls_wstrchr(bad_uni_chars, *uniname))
+ lossy = true;
+
+ SET16_A(upname + j * 2, nls_upper(sb, *uniname));
+
+ uniname++;
+ j++;
+ }
+
+ if (*(p_cstring + i) != '\0')
+ lossy = true;
+ *uniname = (u16)'\0';
+ }
+
+ p_uniname->name_len = j;
+ p_uniname->name_hash = calc_checksum_2byte(upname, j << 1, 0,
+ CS_DEFAULT);
+
+ if (p_lossy)
+ *p_lossy = lossy;
+}
diff --git a/drivers/staging/exfat/exfat_super.c b/drivers/staging/exfat/exfat_super.c
new file mode 100644
index 000000000000..5b5c2ca8c9aa
--- /dev/null
+++ b/drivers/staging/exfat/exfat_super.c
@@ -0,0 +1,4137 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/time.h>
+#include <linux/slab.h>
+#include <linux/seq_file.h>
+#include <linux/pagemap.h>
+#include <linux/mpage.h>
+#include <linux/buffer_head.h>
+#include <linux/exportfs.h>
+#include <linux/mount.h>
+#include <linux/vfs.h>
+#include <linux/aio.h>
+#include <linux/iversion.h>
+#include <linux/parser.h>
+#include <linux/uio.h>
+#include <linux/writeback.h>
+#include <linux/log2.h>
+#include <linux/hash.h>
+#include <linux/backing-dev.h>
+#include <linux/sched.h>
+#include <linux/fs_struct.h>
+#include <linux/namei.h>
+#include <linux/time.h>
+
+#include <linux/string.h>
+#include <linux/nls.h>
+#include <linux/mutex.h>
+#include <linux/swap.h>
+
+#define EXFAT_VERSION "1.3.0"
+
+#include "exfat.h"
+
+static struct kmem_cache *exfat_inode_cachep;
+
+// FIXME use commented lines
+// static int exfat_default_codepage = CONFIG_EXFAT_DEFAULT_CODEPAGE;
+// static char exfat_default_iocharset[] = CONFIG_EXFAT_DEFAULT_IOCHARSET;
+static int exfat_default_codepage = CONFIG_FAT_DEFAULT_CODEPAGE;
+static char exfat_default_iocharset[] = CONFIG_FAT_DEFAULT_IOCHARSET;
+
+#define INC_IVERSION(x) (inode_inc_iversion(x))
+#define GET_IVERSION(x) (inode_peek_iversion_raw(x))
+#define SET_IVERSION(x, y) (inode_set_iversion(x, y))
+
+static struct inode *exfat_iget(struct super_block *sb, loff_t i_pos);
+static int exfat_sync_inode(struct inode *inode);
+static struct inode *exfat_build_inode(struct super_block *sb,
+ struct file_id_t *fid, loff_t i_pos);
+static int exfat_write_inode(struct inode *inode,
+ struct writeback_control *wbc);
+static void exfat_write_super(struct super_block *sb);
+
+#define UNIX_SECS_1980 315532800L
+
+#if BITS_PER_LONG == 64
+#define UNIX_SECS_2108 4354819200L
+#endif
+
+/* days between 1.1.70 and 1.1.80 (2 leap days) */
+#define DAYS_DELTA_DECADE (365 * 10 + 2)
+/* 120 (2100 - 1980) isn't leap year */
+#define NO_LEAP_YEAR_2100 (120)
+#define IS_LEAP_YEAR(y) (!((y) & 0x3) && (y) != NO_LEAP_YEAR_2100)
+
+#define SECS_PER_MIN (60)
+#define SECS_PER_HOUR (60 * SECS_PER_MIN)
+#define SECS_PER_DAY (24 * SECS_PER_HOUR)
+
+#define MAKE_LEAP_YEAR(leap_year, year) \
+ do { \
+ if (unlikely(year > NO_LEAP_YEAR_2100)) \
+ leap_year = ((year + 3) / 4) - 1; \
+ else \
+ leap_year = ((year + 3) / 4); \
+ } while (0)
+
+/* Linear day numbers of the respective 1sts in non-leap years. */
+static time_t accum_days_in_year[] = {
+ /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */
+ 0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0,
+};
+
+/* Convert a FAT time/date pair to a UNIX date (seconds since 1 1 70). */
+static void exfat_time_fat2unix(struct exfat_sb_info *sbi,
+ struct timespec64 *ts, struct date_time_t *tp)
+{
+ time_t year = tp->Year;
+ time_t ld;
+
+ MAKE_LEAP_YEAR(ld, year);
+
+ if (IS_LEAP_YEAR(year) && (tp->Month) > 2)
+ ld++;
+
+ ts->tv_sec = tp->Second +
+ tp->Minute * SECS_PER_MIN +
+ tp->Hour * SECS_PER_HOUR +
+ (ld + accum_days_in_year[(tp->Month)] +
+ (tp->Day - 1)) * SECS_PER_DAY +
+ (year * 365 + DAYS_DELTA_DECADE) * SECS_PER_DAY +
+ sys_tz.tz_minuteswest * SECS_PER_MIN;
+
+ ts->tv_nsec = 0;
+}
+
+/* Convert linear UNIX date to a FAT time/date pair. */
+static void exfat_time_unix2fat(struct exfat_sb_info *sbi,
+ struct timespec64 *ts, struct date_time_t *tp)
+{
+ time_t second = ts->tv_sec;
+ time_t day, month, year;
+ time_t ld;
+
+ second -= sys_tz.tz_minuteswest * SECS_PER_MIN;
+
+ /* Jan 1 GMT 00:00:00 1980. But what about another time zone? */
+ if (second < UNIX_SECS_1980) {
+ tp->Second = 0;
+ tp->Minute = 0;
+ tp->Hour = 0;
+ tp->Day = 1;
+ tp->Month = 1;
+ tp->Year = 0;
+ return;
+ }
+#if (BITS_PER_LONG == 64)
+ if (second >= UNIX_SECS_2108) {
+ tp->Second = 59;
+ tp->Minute = 59;
+ tp->Hour = 23;
+ tp->Day = 31;
+ tp->Month = 12;
+ tp->Year = 127;
+ return;
+ }
+#endif
+ day = second / SECS_PER_DAY - DAYS_DELTA_DECADE;
+ year = day / 365;
+ MAKE_LEAP_YEAR(ld, year);
+ if (year * 365 + ld > day)
+ year--;
+
+ MAKE_LEAP_YEAR(ld, year);
+ day -= year * 365 + ld;
+
+ if (IS_LEAP_YEAR(year) && day == accum_days_in_year[3]) {
+ month = 2;
+ } else {
+ if (IS_LEAP_YEAR(year) && day > accum_days_in_year[3])
+ day--;
+ for (month = 1; month < 12; month++) {
+ if (accum_days_in_year[month + 1] > day)
+ break;
+ }
+ }
+ day -= accum_days_in_year[month];
+
+ tp->Second = second % SECS_PER_MIN;
+ tp->Minute = (second / SECS_PER_MIN) % 60;
+ tp->Hour = (second / SECS_PER_HOUR) % 24;
+ tp->Day = day + 1;
+ tp->Month = month;
+ tp->Year = year;
+}
+
+struct timestamp_t *tm_current(struct timestamp_t *tp)
+{
+ struct timespec64 ts;
+ time_t second, day, leap_day, month, year;
+
+ ktime_get_real_ts64(&ts);
+
+ second = ts.tv_sec;
+ second -= sys_tz.tz_minuteswest * SECS_PER_MIN;
+
+ /* Jan 1 GMT 00:00:00 1980. But what about another time zone? */
+ if (second < UNIX_SECS_1980) {
+ tp->sec = 0;
+ tp->min = 0;
+ tp->hour = 0;
+ tp->day = 1;
+ tp->mon = 1;
+ tp->year = 0;
+ return tp;
+ }
+#if BITS_PER_LONG == 64
+ if (second >= UNIX_SECS_2108) {
+ tp->sec = 59;
+ tp->min = 59;
+ tp->hour = 23;
+ tp->day = 31;
+ tp->mon = 12;
+ tp->year = 127;
+ return tp;
+ }
+#endif
+
+ day = second / SECS_PER_DAY - DAYS_DELTA_DECADE;
+ year = day / 365;
+
+ MAKE_LEAP_YEAR(leap_day, year);
+ if (year * 365 + leap_day > day)
+ year--;
+
+ MAKE_LEAP_YEAR(leap_day, year);
+
+ day -= year * 365 + leap_day;
+
+ if (IS_LEAP_YEAR(year) && day == accum_days_in_year[3]) {
+ month = 2;
+ } else {
+ if (IS_LEAP_YEAR(year) && day > accum_days_in_year[3])
+ day--;
+ for (month = 1; month < 12; month++) {
+ if (accum_days_in_year[month + 1] > day)
+ break;
+ }
+ }
+ day -= accum_days_in_year[month];
+
+ tp->sec = second % SECS_PER_MIN;
+ tp->min = (second / SECS_PER_MIN) % 60;
+ tp->hour = (second / SECS_PER_HOUR) % 24;
+ tp->day = day + 1;
+ tp->mon = month;
+ tp->year = year;
+
+ return tp;
+}
+
+static void __lock_super(struct super_block *sb)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+
+ mutex_lock(&sbi->s_lock);
+}
+
+static void __unlock_super(struct super_block *sb)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+
+ mutex_unlock(&sbi->s_lock);
+}
+
+static int __is_sb_dirty(struct super_block *sb)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+
+ return sbi->s_dirt;
+}
+
+static void __set_sb_clean(struct super_block *sb)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+
+ sbi->s_dirt = 0;
+}
+
+static int __exfat_revalidate(struct dentry *dentry)
+{
+ return 0;
+}
+
+static int exfat_revalidate(struct dentry *dentry, unsigned int flags)
+{
+ if (flags & LOOKUP_RCU)
+ return -ECHILD;
+
+ if (dentry->d_inode)
+ return 1;
+ return __exfat_revalidate(dentry);
+}
+
+static int exfat_revalidate_ci(struct dentry *dentry, unsigned int flags)
+{
+ if (flags & LOOKUP_RCU)
+ return -ECHILD;
+
+ if (dentry->d_inode)
+ return 1;
+
+ if (!flags)
+ return 0;
+
+ if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+ return 0;
+
+ return __exfat_revalidate(dentry);
+}
+
+static unsigned int __exfat_striptail_len(unsigned int len, const char *name)
+{
+ while (len && name[len - 1] == '.')
+ len--;
+ return len;
+}
+
+static unsigned int exfat_striptail_len(const struct qstr *qstr)
+{
+ return __exfat_striptail_len(qstr->len, qstr->name);
+}
+
+static int exfat_d_hash(const struct dentry *dentry, struct qstr *qstr)
+{
+ qstr->hash = full_name_hash(dentry, qstr->name,
+ exfat_striptail_len(qstr));
+ return 0;
+}
+
+static int exfat_d_hashi(const struct dentry *dentry, struct qstr *qstr)
+{
+ struct super_block *sb = dentry->d_sb;
+ const unsigned char *name;
+ unsigned int len;
+ unsigned long hash;
+
+ name = qstr->name;
+ len = exfat_striptail_len(qstr);
+
+ hash = init_name_hash(dentry);
+ while (len--)
+ hash = partial_name_hash(nls_upper(sb, *name++), hash);
+ qstr->hash = end_name_hash(hash);
+
+ return 0;
+}
+
+static int exfat_cmpi(const struct dentry *dentry, unsigned int len,
+ const char *str, const struct qstr *name)
+{
+ struct nls_table *t = EXFAT_SB(dentry->d_sb)->nls_io;
+ unsigned int alen, blen;
+
+ alen = exfat_striptail_len(name);
+ blen = __exfat_striptail_len(len, str);
+ if (alen == blen) {
+ if (t == NULL) {
+ if (strncasecmp(name->name, str, alen) == 0)
+ return 0;
+ } else if (nls_strnicmp(t, name->name, str, alen) == 0)
+ return 0;
+ }
+ return 1;
+}
+
+static int exfat_cmp(const struct dentry *dentry, unsigned int len,
+ const char *str, const struct qstr *name)
+{
+ unsigned int alen, blen;
+
+ alen = exfat_striptail_len(name);
+ blen = __exfat_striptail_len(len, str);
+ if (alen == blen) {
+ if (strncmp(name->name, str, alen) == 0)
+ return 0;
+ }
+ return 1;
+}
+
+static const struct dentry_operations exfat_ci_dentry_ops = {
+ .d_revalidate = exfat_revalidate_ci,
+ .d_hash = exfat_d_hashi,
+ .d_compare = exfat_cmpi,
+};
+
+static const struct dentry_operations exfat_dentry_ops = {
+ .d_revalidate = exfat_revalidate,
+ .d_hash = exfat_d_hash,
+ .d_compare = exfat_cmp,
+};
+
+static DEFINE_SEMAPHORE(z_sem);
+
+static inline void fs_sync(struct super_block *sb, bool do_sync)
+{
+ if (do_sync)
+ bdev_sync(sb);
+}
+
+/*
+ * If ->i_mode can't hold S_IWUGO (i.e. ATTR_RO), we use ->i_attrs to
+ * save ATTR_RO instead of ->i_mode.
+ *
+ * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only
+ * bit, it's just used as flag for app.
+ */
+static inline int exfat_mode_can_hold_ro(struct inode *inode)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
+
+ if (S_ISDIR(inode->i_mode))
+ return 0;
+
+ if ((~sbi->options.fs_fmask) & 0222)
+ return 1;
+ return 0;
+}
+
+/* Convert attribute bits and a mask to the UNIX mode. */
+static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, u32 attr,
+ mode_t mode)
+{
+ if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR))
+ mode &= ~0222;
+
+ if (attr & ATTR_SUBDIR)
+ return (mode & ~sbi->options.fs_dmask) | S_IFDIR;
+ else if (attr & ATTR_SYMLINK)
+ return (mode & ~sbi->options.fs_dmask) | S_IFLNK;
+ else
+ return (mode & ~sbi->options.fs_fmask) | S_IFREG;
+}
+
+/* Return the FAT attribute byte for this inode */
+static inline u32 exfat_make_attr(struct inode *inode)
+{
+ if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222))
+ return (EXFAT_I(inode)->fid.attr) | ATTR_READONLY;
+ else
+ return EXFAT_I(inode)->fid.attr;
+}
+
+static inline void exfat_save_attr(struct inode *inode, u32 attr)
+{
+ if (exfat_mode_can_hold_ro(inode))
+ EXFAT_I(inode)->fid.attr = attr & ATTR_RWMASK;
+ else
+ EXFAT_I(inode)->fid.attr = attr & (ATTR_RWMASK | ATTR_READONLY);
+}
+
+static int ffsMountVol(struct super_block *sb)
+{
+ int i, ret;
+ struct pbr_sector_t *p_pbr;
+ struct buffer_head *tmp_bh = NULL;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ pr_info("[EXFAT] trying to mount...\n");
+
+ down(&z_sem);
+
+ buf_init(sb);
+
+ sema_init(&p_fs->v_sem, 1);
+ p_fs->dev_ejected = FALSE;
+
+ /* open the block device */
+ bdev_open(sb);
+
+ if (p_bd->sector_size < sb->s_blocksize) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ if (p_bd->sector_size > sb->s_blocksize)
+ sb_set_blocksize(sb, p_bd->sector_size);
+
+ /* read Sector 0 */
+ if (sector_read(sb, 0, &tmp_bh, 1) != FFS_SUCCESS) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+
+ p_fs->PBR_sector = 0;
+
+ p_pbr = (struct pbr_sector_t *) tmp_bh->b_data;
+
+ /* check the validity of PBR */
+ if (GET16_A(p_pbr->signature) != PBR_SIGNATURE) {
+ brelse(tmp_bh);
+ bdev_close(sb);
+ ret = FFS_FORMATERR;
+ goto out;
+ }
+
+ /* fill fs_stuct */
+ for (i = 0; i < 53; i++)
+ if (p_pbr->bpb[i])
+ break;
+
+ if (i < 53) {
+ if (GET16(p_pbr->bpb + 11)) /* num_fat_sectors */
+ ret = fat16_mount(sb, p_pbr);
+ else
+ ret = fat32_mount(sb, p_pbr);
+ } else {
+ ret = exfat_mount(sb, p_pbr);
+ }
+
+ brelse(tmp_bh);
+
+ if (ret) {
+ bdev_close(sb);
+ goto out;
+ }
+
+ if (p_fs->vol_type == EXFAT) {
+ ret = load_alloc_bitmap(sb);
+ if (ret) {
+ bdev_close(sb);
+ goto out;
+ }
+ ret = load_upcase_table(sb);
+ if (ret) {
+ free_alloc_bitmap(sb);
+ bdev_close(sb);
+ goto out;
+ }
+ }
+
+ if (p_fs->dev_ejected) {
+ if (p_fs->vol_type == EXFAT) {
+ free_upcase_table(sb);
+ free_alloc_bitmap(sb);
+ }
+ bdev_close(sb);
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+
+ pr_info("[EXFAT] mounted successfully\n");
+
+out:
+ up(&z_sem);
+
+ return ret;
+}
+
+static int ffsUmountVol(struct super_block *sb)
+{
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ int err = FFS_SUCCESS;
+
+ pr_info("[EXFAT] trying to unmount...\n");
+
+ down(&z_sem);
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ fs_sync(sb, false);
+ fs_set_vol_flags(sb, VOL_CLEAN);
+
+ if (p_fs->vol_type == EXFAT) {
+ free_upcase_table(sb);
+ free_alloc_bitmap(sb);
+ }
+
+ FAT_release_all(sb);
+ buf_release_all(sb);
+
+ /* close the block device */
+ bdev_close(sb);
+
+ if (p_fs->dev_ejected) {
+ pr_info("[EXFAT] unmounted with media errors. Device is already ejected.\n");
+ err = FFS_MEDIAERR;
+ }
+
+ buf_shutdown(sb);
+
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+ up(&z_sem);
+
+ pr_info("[EXFAT] unmounted successfully\n");
+
+ return err;
+}
+
+static int ffsGetVolInfo(struct super_block *sb, struct vol_info_t *info)
+{
+ int err = FFS_SUCCESS;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ /* check the validity of pointer parameters */
+ if (info == NULL)
+ return FFS_ERROR;
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ if (p_fs->used_clusters == (u32) ~0)
+ p_fs->used_clusters = p_fs->fs_func->count_used_clusters(sb);
+
+ info->FatType = p_fs->vol_type;
+ info->ClusterSize = p_fs->cluster_size;
+ info->NumClusters = p_fs->num_clusters - 2; /* clu 0 & 1 */
+ info->UsedClusters = p_fs->used_clusters;
+ info->FreeClusters = info->NumClusters - info->UsedClusters;
+
+ if (p_fs->dev_ejected)
+ err = FFS_MEDIAERR;
+
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return err;
+}
+
+static int ffsSyncVol(struct super_block *sb, bool do_sync)
+{
+ int err = FFS_SUCCESS;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ /* synchronize the file system */
+ fs_sync(sb, do_sync);
+ fs_set_vol_flags(sb, VOL_CLEAN);
+
+ if (p_fs->dev_ejected)
+ err = FFS_MEDIAERR;
+
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return err;
+}
+
+/*----------------------------------------------------------------------*/
+/* File Operation Functions */
+/*----------------------------------------------------------------------*/
+
+static int ffsLookupFile(struct inode *inode, char *path, struct file_id_t *fid)
+{
+ int ret, dentry, num_entries;
+ struct chain_t dir;
+ struct uni_name_t uni_name;
+ struct dos_name_t dos_name;
+ struct dentry_t *ep, *ep2;
+ struct entry_set_cache_t *es = NULL;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ pr_debug("%s entered\n", __func__);
+
+ /* check the validity of pointer parameters */
+ if ((fid == NULL) || (path == NULL) || (*path == '\0'))
+ return FFS_ERROR;
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ /* check the validity of directory name in the given pathname */
+ ret = resolve_path(inode, path, &dir, &uni_name);
+ if (ret)
+ goto out;
+
+ ret = get_num_entries_and_dos_name(sb, &dir, &uni_name, &num_entries,
+ &dos_name);
+ if (ret)
+ goto out;
+
+ /* search the file name for directories */
+ dentry = p_fs->fs_func->find_dir_entry(sb, &dir, &uni_name, num_entries,
+ &dos_name, TYPE_ALL);
+ if (dentry < -1) {
+ return FFS_NOTFOUND;
+ goto out;
+ }
+
+ fid->dir.dir = dir.dir;
+ fid->dir.size = dir.size;
+ fid->dir.flags = dir.flags;
+ fid->entry = dentry;
+
+ if (dentry == -1) {
+ fid->type = TYPE_DIR;
+ fid->rwoffset = 0;
+ fid->hint_last_off = -1;
+
+ fid->attr = ATTR_SUBDIR;
+ fid->flags = 0x01;
+ fid->size = 0;
+ fid->start_clu = p_fs->root_dir;
+ } else {
+ if (p_fs->vol_type == EXFAT) {
+ es = get_entry_set_in_dir(sb, &dir, dentry,
+ ES_2_ENTRIES, &ep);
+ if (!es) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ ep2 = ep+1;
+ } else {
+ ep = get_entry_in_dir(sb, &dir, dentry, NULL);
+ if (!ep) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ ep2 = ep;
+ }
+
+ fid->type = p_fs->fs_func->get_entry_type(ep);
+ fid->rwoffset = 0;
+ fid->hint_last_off = -1;
+ fid->attr = p_fs->fs_func->get_entry_attr(ep);
+
+ fid->size = p_fs->fs_func->get_entry_size(ep2);
+ if ((fid->type == TYPE_FILE) && (fid->size == 0)) {
+ fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
+ fid->start_clu = CLUSTER_32(~0);
+ } else {
+ fid->flags = p_fs->fs_func->get_entry_flag(ep2);
+ fid->start_clu = p_fs->fs_func->get_entry_clu0(ep2);
+ }
+
+ if (p_fs->vol_type == EXFAT)
+ release_entry_set(es);
+ }
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+
+static int ffsCreateFile(struct inode *inode, char *path, u8 mode,
+ struct file_id_t *fid)
+{
+ struct chain_t dir;
+ struct uni_name_t uni_name;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ int ret;
+
+ /* check the validity of pointer parameters */
+ if ((fid == NULL) || (path == NULL) || (*path == '\0'))
+ return FFS_ERROR;
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ /* check the validity of directory name in the given pathname */
+ ret = resolve_path(inode, path, &dir, &uni_name);
+ if (ret)
+ goto out;
+
+ fs_set_vol_flags(sb, VOL_DIRTY);
+
+ /* create a new file */
+ ret = create_file(inode, &dir, &uni_name, mode, fid);
+
+#ifdef CONFIG_EXFAT_DELAYED_SYNC
+ fs_sync(sb, false);
+ fs_set_vol_flags(sb, VOL_CLEAN);
+#endif
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+
+static int ffsReadFile(struct inode *inode, struct file_id_t *fid, void *buffer,
+ u64 count, u64 *rcount)
+{
+ s32 offset, sec_offset, clu_offset;
+ u32 clu;
+ int ret;
+ sector_t LogSector;
+ u64 oneblkread, read_bytes;
+ struct buffer_head *tmp_bh = NULL;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ /* check the validity of the given file id */
+ if (fid == NULL)
+ return FFS_INVALIDFID;
+
+ /* check the validity of pointer parameters */
+ if (buffer == NULL)
+ return FFS_ERROR;
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ /* check if the given file ID is opened */
+ if (fid->type != TYPE_FILE) {
+ ret = FFS_PERMISSIONERR;
+ goto out;
+ }
+
+ if (fid->rwoffset > fid->size)
+ fid->rwoffset = fid->size;
+
+ if (count > (fid->size - fid->rwoffset))
+ count = fid->size - fid->rwoffset;
+
+ if (count == 0) {
+ if (rcount != NULL)
+ *rcount = 0;
+ ret = FFS_EOF;
+ goto out;
+ }
+
+ read_bytes = 0;
+
+ while (count > 0) {
+ clu_offset = (s32)(fid->rwoffset >> p_fs->cluster_size_bits);
+ clu = fid->start_clu;
+
+ if (fid->flags == 0x03) {
+ clu += clu_offset;
+ } else {
+ /* hint information */
+ if ((clu_offset > 0) && (fid->hint_last_off > 0) &&
+ (clu_offset >= fid->hint_last_off)) {
+ clu_offset -= fid->hint_last_off;
+ clu = fid->hint_last_clu;
+ }
+
+ while (clu_offset > 0) {
+ /* clu = FAT_read(sb, clu); */
+ if (FAT_read(sb, clu, &clu) == -1)
+ return FFS_MEDIAERR;
+
+ clu_offset--;
+ }
+ }
+
+ /* hint information */
+ fid->hint_last_off = (s32)(fid->rwoffset >>
+ p_fs->cluster_size_bits);
+ fid->hint_last_clu = clu;
+
+ /* byte offset in cluster */
+ offset = (s32)(fid->rwoffset & (p_fs->cluster_size-1));
+
+ /* sector offset in cluster */
+ sec_offset = offset >> p_bd->sector_size_bits;
+
+ /* byte offset in sector */
+ offset &= p_bd->sector_size_mask;
+
+ LogSector = START_SECTOR(clu) + sec_offset;
+
+ oneblkread = (u64)(p_bd->sector_size - offset);
+ if (oneblkread > count)
+ oneblkread = count;
+
+ if ((offset == 0) && (oneblkread == p_bd->sector_size)) {
+ if (sector_read(sb, LogSector, &tmp_bh, 1) !=
+ FFS_SUCCESS)
+ goto err_out;
+ memcpy((char *)buffer + read_bytes,
+ (char *)tmp_bh->b_data, (s32)oneblkread);
+ } else {
+ if (sector_read(sb, LogSector, &tmp_bh, 1) !=
+ FFS_SUCCESS)
+ goto err_out;
+ memcpy((char *)buffer + read_bytes,
+ (char *)tmp_bh->b_data + offset,
+ (s32)oneblkread);
+ }
+ count -= oneblkread;
+ read_bytes += oneblkread;
+ fid->rwoffset += oneblkread;
+ }
+ brelse(tmp_bh);
+
+/* How did this ever work and not leak a brlse()?? */
+err_out:
+ /* set the size of read bytes */
+ if (rcount != NULL)
+ *rcount = read_bytes;
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+
+static int ffsWriteFile(struct inode *inode, struct file_id_t *fid,
+ void *buffer, u64 count, u64 *wcount)
+{
+ s32 modified = FALSE, offset, sec_offset, clu_offset;
+ s32 num_clusters, num_alloc, num_alloced = (s32) ~0;
+ int ret = 0;
+ u32 clu, last_clu;
+ sector_t LogSector, sector = 0;
+ u64 oneblkwrite, write_bytes;
+ struct chain_t new_clu;
+ struct timestamp_t tm;
+ struct dentry_t *ep, *ep2;
+ struct entry_set_cache_t *es = NULL;
+ struct buffer_head *tmp_bh = NULL;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+ /* check the validity of the given file id */
+ if (fid == NULL)
+ return FFS_INVALIDFID;
+
+ /* check the validity of pointer parameters */
+ if (buffer == NULL)
+ return FFS_ERROR;
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ /* check if the given file ID is opened */
+ if (fid->type != TYPE_FILE) {
+ ret = FFS_PERMISSIONERR;
+ goto out;
+ }
+
+ if (fid->rwoffset > fid->size)
+ fid->rwoffset = fid->size;
+
+ if (count == 0) {
+ if (wcount != NULL)
+ *wcount = 0;
+ ret = FFS_SUCCESS;
+ goto out;
+ }
+
+ fs_set_vol_flags(sb, VOL_DIRTY);
+
+ if (fid->size == 0)
+ num_clusters = 0;
+ else
+ num_clusters = (s32)((fid->size-1) >>
+ p_fs->cluster_size_bits) + 1;
+
+ write_bytes = 0;
+
+ while (count > 0) {
+ clu_offset = (s32)(fid->rwoffset >> p_fs->cluster_size_bits);
+ clu = last_clu = fid->start_clu;
+
+ if (fid->flags == 0x03) {
+ if ((clu_offset > 0) && (clu != CLUSTER_32(~0))) {
+ last_clu += clu_offset - 1;
+
+ if (clu_offset == num_clusters)
+ clu = CLUSTER_32(~0);
+ else
+ clu += clu_offset;
+ }
+ } else {
+ /* hint information */
+ if ((clu_offset > 0) && (fid->hint_last_off > 0) &&
+ (clu_offset >= fid->hint_last_off)) {
+ clu_offset -= fid->hint_last_off;
+ clu = fid->hint_last_clu;
+ }
+
+ while ((clu_offset > 0) && (clu != CLUSTER_32(~0))) {
+ last_clu = clu;
+ /* clu = FAT_read(sb, clu); */
+ if (FAT_read(sb, clu, &clu) == -1) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ clu_offset--;
+ }
+ }
+
+ if (clu == CLUSTER_32(~0)) {
+ num_alloc = (s32)((count - 1) >>
+ p_fs->cluster_size_bits) + 1;
+ new_clu.dir = (last_clu == CLUSTER_32(~0)) ?
+ CLUSTER_32(~0) : last_clu+1;
+ new_clu.size = 0;
+ new_clu.flags = fid->flags;
+
+ /* (1) allocate a chain of clusters */
+ num_alloced = p_fs->fs_func->alloc_cluster(sb,
+ num_alloc,
+ &new_clu);
+ if (num_alloced == 0)
+ break;
+ else if (num_alloced < 0) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+
+ /* (2) append to the FAT chain */
+ if (last_clu == CLUSTER_32(~0)) {
+ if (new_clu.flags == 0x01)
+ fid->flags = 0x01;
+ fid->start_clu = new_clu.dir;
+ modified = TRUE;
+ } else {
+ if (new_clu.flags != fid->flags) {
+ exfat_chain_cont_cluster(sb,
+ fid->start_clu,
+ num_clusters);
+ fid->flags = 0x01;
+ modified = TRUE;
+ }
+ if (new_clu.flags == 0x01)
+ FAT_write(sb, last_clu, new_clu.dir);
+ }
+
+ num_clusters += num_alloced;
+ clu = new_clu.dir;
+ }
+
+ /* hint information */
+ fid->hint_last_off = (s32)(fid->rwoffset >>
+ p_fs->cluster_size_bits);
+ fid->hint_last_clu = clu;
+
+ /* byte offset in cluster */
+ offset = (s32)(fid->rwoffset & (p_fs->cluster_size - 1));
+
+ /* sector offset in cluster */
+ sec_offset = offset >> p_bd->sector_size_bits;
+
+ /* byte offset in sector */
+ offset &= p_bd->sector_size_mask;
+
+ LogSector = START_SECTOR(clu) + sec_offset;
+
+ oneblkwrite = (u64)(p_bd->sector_size - offset);
+ if (oneblkwrite > count)
+ oneblkwrite = count;
+
+ if ((offset == 0) && (oneblkwrite == p_bd->sector_size)) {
+ if (sector_read(sb, LogSector, &tmp_bh, 0) !=
+ FFS_SUCCESS)
+ goto err_out;
+ memcpy((char *)tmp_bh->b_data,
+ (char *)buffer + write_bytes, (s32)oneblkwrite);
+ if (sector_write(sb, LogSector, tmp_bh, 0) !=
+ FFS_SUCCESS) {
+ brelse(tmp_bh);
+ goto err_out;
+ }
+ } else {
+ if ((offset > 0) ||
+ ((fid->rwoffset+oneblkwrite) < fid->size)) {
+ if (sector_read(sb, LogSector, &tmp_bh, 1) !=
+ FFS_SUCCESS)
+ goto err_out;
+ } else {
+ if (sector_read(sb, LogSector, &tmp_bh, 0) !=
+ FFS_SUCCESS)
+ goto err_out;
+ }
+
+ memcpy((char *)tmp_bh->b_data + offset,
+ (char *)buffer + write_bytes, (s32)oneblkwrite);
+ if (sector_write(sb, LogSector, tmp_bh, 0) !=
+ FFS_SUCCESS) {
+ brelse(tmp_bh);
+ goto err_out;
+ }
+ }
+
+ count -= oneblkwrite;
+ write_bytes += oneblkwrite;
+ fid->rwoffset += oneblkwrite;
+
+ fid->attr |= ATTR_ARCHIVE;
+
+ if (fid->size < fid->rwoffset) {
+ fid->size = fid->rwoffset;
+ modified = TRUE;
+ }
+ }
+
+ brelse(tmp_bh);
+
+ /* (3) update the direcoty entry */
+ if (p_fs->vol_type == EXFAT) {
+ es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry,
+ ES_ALL_ENTRIES, &ep);
+ if (es == NULL)
+ goto err_out;
+ ep2 = ep+1;
+ } else {
+ ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, §or);
+ if (!ep)
+ goto err_out;
+ ep2 = ep;
+ }
+
+ p_fs->fs_func->set_entry_time(ep, tm_current(&tm), TM_MODIFY);
+ p_fs->fs_func->set_entry_attr(ep, fid->attr);
+
+ if (p_fs->vol_type != EXFAT)
+ buf_modify(sb, sector);
+
+ if (modified) {
+ if (p_fs->fs_func->get_entry_flag(ep2) != fid->flags)
+ p_fs->fs_func->set_entry_flag(ep2, fid->flags);
+
+ if (p_fs->fs_func->get_entry_size(ep2) != fid->size)
+ p_fs->fs_func->set_entry_size(ep2, fid->size);
+
+ if (p_fs->fs_func->get_entry_clu0(ep2) != fid->start_clu)
+ p_fs->fs_func->set_entry_clu0(ep2, fid->start_clu);
+
+ if (p_fs->vol_type != EXFAT)
+ buf_modify(sb, sector);
+ }
+
+ if (p_fs->vol_type == EXFAT) {
+ update_dir_checksum_with_entry_set(sb, es);
+ release_entry_set(es);
+ }
+
+#ifdef CONFIG_EXFAT_DELAYED_SYNC
+ fs_sync(sb, false);
+ fs_set_vol_flags(sb, VOL_CLEAN);
+#endif
+
+err_out:
+ /* set the size of written bytes */
+ if (wcount != NULL)
+ *wcount = write_bytes;
+
+ if (num_alloced == 0)
+ ret = FFS_FULL;
+
+ else if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+
+static int ffsTruncateFile(struct inode *inode, u64 old_size, u64 new_size)
+{
+ s32 num_clusters;
+ u32 last_clu = CLUSTER_32(0);
+ int ret = 0;
+ sector_t sector = 0;
+ struct chain_t clu;
+ struct timestamp_t tm;
+ struct dentry_t *ep, *ep2;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct file_id_t *fid = &(EXFAT_I(inode)->fid);
+ struct entry_set_cache_t *es = NULL;
+
+ pr_debug("%s entered (inode %p size %llu)\n", __func__, inode,
+ new_size);
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ /* check if the given file ID is opened */
+ if (fid->type != TYPE_FILE) {
+ ret = FFS_PERMISSIONERR;
+ goto out;
+ }
+
+ if (fid->size != old_size) {
+ pr_err("[EXFAT] truncate : can't skip it because of size-mismatch(old:%lld->fid:%lld).\n",
+ old_size, fid->size);
+ }
+
+ if (old_size <= new_size) {
+ ret = FFS_SUCCESS;
+ goto out;
+ }
+
+ fs_set_vol_flags(sb, VOL_DIRTY);
+
+ clu.dir = fid->start_clu;
+ clu.size = (s32)((old_size-1) >> p_fs->cluster_size_bits) + 1;
+ clu.flags = fid->flags;
+
+ if (new_size > 0) {
+ num_clusters = (s32)((new_size-1) >>
+ p_fs->cluster_size_bits) + 1;
+
+ if (clu.flags == 0x03) {
+ clu.dir += num_clusters;
+ } else {
+ while (num_clusters > 0) {
+ last_clu = clu.dir;
+ if (FAT_read(sb, clu.dir, &clu.dir) == -1)
+ return FFS_MEDIAERR;
+ num_clusters--;
+ }
+ }
+
+ clu.size -= num_clusters;
+ }
+
+ fid->size = new_size;
+ fid->attr |= ATTR_ARCHIVE;
+ if (new_size == 0) {
+ fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
+ fid->start_clu = CLUSTER_32(~0);
+ }
+
+ /* (1) update the directory entry */
+ if (p_fs->vol_type == EXFAT) {
+ es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
+ ES_ALL_ENTRIES, &ep);
+ if (es == NULL) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ ep2 = ep+1;
+ } else {
+ ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, §or);
+ if (!ep) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ ep2 = ep;
+ }
+
+ p_fs->fs_func->set_entry_time(ep, tm_current(&tm), TM_MODIFY);
+ p_fs->fs_func->set_entry_attr(ep, fid->attr);
+
+ p_fs->fs_func->set_entry_size(ep2, new_size);
+ if (new_size == 0) {
+ p_fs->fs_func->set_entry_flag(ep2, 0x01);
+ p_fs->fs_func->set_entry_clu0(ep2, CLUSTER_32(0));
+ }
+
+ if (p_fs->vol_type != EXFAT)
+ buf_modify(sb, sector);
+ else {
+ update_dir_checksum_with_entry_set(sb, es);
+ release_entry_set(es);
+ }
+
+ /* (2) cut off from the FAT chain */
+ if (last_clu != CLUSTER_32(0)) {
+ if (fid->flags == 0x01)
+ FAT_write(sb, last_clu, CLUSTER_32(~0));
+ }
+
+ /* (3) free the clusters */
+ p_fs->fs_func->free_cluster(sb, &clu, 0);
+
+ /* hint information */
+ fid->hint_last_off = -1;
+ if (fid->rwoffset > fid->size)
+ fid->rwoffset = fid->size;
+
+#ifdef CONFIG_EXFAT_DELAYED_SYNC
+ fs_sync(sb, false);
+ fs_set_vol_flags(sb, VOL_CLEAN);
+#endif
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+
+out:
+ pr_debug("%s exited (%d)\n", __func__, ret);
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+
+static void update_parent_info(struct file_id_t *fid,
+ struct inode *parent_inode)
+{
+ struct fs_info_t *p_fs = &(EXFAT_SB(parent_inode->i_sb)->fs_info);
+ struct file_id_t *parent_fid = &(EXFAT_I(parent_inode)->fid);
+
+ if (unlikely((parent_fid->flags != fid->dir.flags) ||
+ (parent_fid->size !=
+ (fid->dir.size << p_fs->cluster_size_bits)) ||
+ (parent_fid->start_clu != fid->dir.dir))) {
+ fid->dir.dir = parent_fid->start_clu;
+ fid->dir.flags = parent_fid->flags;
+ fid->dir.size = ((parent_fid->size + (p_fs->cluster_size-1))
+ >> p_fs->cluster_size_bits);
+ }
+}
+
+static int ffsMoveFile(struct inode *old_parent_inode, struct file_id_t *fid,
+ struct inode *new_parent_inode, struct dentry *new_dentry)
+{
+ s32 ret;
+ s32 dentry;
+ struct chain_t olddir, newdir;
+ struct chain_t *p_dir = NULL;
+ struct uni_name_t uni_name;
+ struct dentry_t *ep;
+ struct super_block *sb = old_parent_inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ u8 *new_path = (u8 *) new_dentry->d_name.name;
+ struct inode *new_inode = new_dentry->d_inode;
+ int num_entries;
+ struct file_id_t *new_fid = NULL;
+ s32 new_entry = 0;
+
+ /* check the validity of the given file id */
+ if (fid == NULL)
+ return FFS_INVALIDFID;
+
+ /* check the validity of pointer parameters */
+ if ((new_path == NULL) || (*new_path == '\0'))
+ return FFS_ERROR;
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ update_parent_info(fid, old_parent_inode);
+
+ olddir.dir = fid->dir.dir;
+ olddir.size = fid->dir.size;
+ olddir.flags = fid->dir.flags;
+
+ dentry = fid->entry;
+
+ /* check if the old file is "." or ".." */
+ if (p_fs->vol_type != EXFAT) {
+ if ((olddir.dir != p_fs->root_dir) && (dentry < 2)) {
+ ret = FFS_PERMISSIONERR;
+ goto out2;
+ }
+ }
+
+ ep = get_entry_in_dir(sb, &olddir, dentry, NULL);
+ if (!ep) {
+ ret = FFS_MEDIAERR;
+ goto out2;
+ }
+
+ if (p_fs->fs_func->get_entry_attr(ep) & ATTR_READONLY) {
+ ret = FFS_PERMISSIONERR;
+ goto out2;
+ }
+
+ /* check whether new dir is existing directory and empty */
+ if (new_inode) {
+ u32 entry_type;
+
+ ret = FFS_MEDIAERR;
+ new_fid = &EXFAT_I(new_inode)->fid;
+
+ update_parent_info(new_fid, new_parent_inode);
+
+ p_dir = &(new_fid->dir);
+ new_entry = new_fid->entry;
+ ep = get_entry_in_dir(sb, p_dir, new_entry, NULL);
+ if (!ep)
+ goto out;
+
+ entry_type = p_fs->fs_func->get_entry_type(ep);
+
+ if (entry_type == TYPE_DIR) {
+ struct chain_t new_clu;
+
+ new_clu.dir = new_fid->start_clu;
+ new_clu.size = (s32)((new_fid->size - 1) >>
+ p_fs->cluster_size_bits) + 1;
+ new_clu.flags = new_fid->flags;
+
+ if (!is_dir_empty(sb, &new_clu)) {
+ ret = FFS_FILEEXIST;
+ goto out;
+ }
+ }
+ }
+
+ /* check the validity of directory name in the given new pathname */
+ ret = resolve_path(new_parent_inode, new_path, &newdir, &uni_name);
+ if (ret)
+ goto out2;
+
+ fs_set_vol_flags(sb, VOL_DIRTY);
+
+ if (olddir.dir == newdir.dir)
+ ret = rename_file(new_parent_inode, &olddir, dentry, &uni_name,
+ fid);
+ else
+ ret = move_file(new_parent_inode, &olddir, dentry, &newdir,
+ &uni_name, fid);
+
+ if ((ret == FFS_SUCCESS) && new_inode) {
+ /* delete entries of new_dir */
+ ep = get_entry_in_dir(sb, p_dir, new_entry, NULL);
+ if (!ep)
+ goto out;
+
+ num_entries = p_fs->fs_func->count_ext_entries(sb, p_dir,
+ new_entry, ep);
+ if (num_entries < 0)
+ goto out;
+ p_fs->fs_func->delete_dir_entry(sb, p_dir, new_entry, 0,
+ num_entries+1);
+ }
+out:
+#ifdef CONFIG_EXFAT_DELAYED_SYNC
+ fs_sync(sb, false);
+ fs_set_vol_flags(sb, VOL_CLEAN);
+#endif
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+out2:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+
+static int ffsRemoveFile(struct inode *inode, struct file_id_t *fid)
+{
+ s32 dentry;
+ int ret = FFS_SUCCESS;
+ struct chain_t dir, clu_to_free;
+ struct dentry_t *ep;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ /* check the validity of the given file id */
+ if (fid == NULL)
+ return FFS_INVALIDFID;
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ dir.dir = fid->dir.dir;
+ dir.size = fid->dir.size;
+ dir.flags = fid->dir.flags;
+
+ dentry = fid->entry;
+
+ ep = get_entry_in_dir(sb, &dir, dentry, NULL);
+ if (!ep) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+
+ if (p_fs->fs_func->get_entry_attr(ep) & ATTR_READONLY) {
+ ret = FFS_PERMISSIONERR;
+ goto out;
+ }
+ fs_set_vol_flags(sb, VOL_DIRTY);
+
+ /* (1) update the directory entry */
+ remove_file(inode, &dir, dentry);
+
+ clu_to_free.dir = fid->start_clu;
+ clu_to_free.size = (s32)((fid->size-1) >> p_fs->cluster_size_bits) + 1;
+ clu_to_free.flags = fid->flags;
+
+ /* (2) free the clusters */
+ p_fs->fs_func->free_cluster(sb, &clu_to_free, 0);
+
+ fid->size = 0;
+ fid->start_clu = CLUSTER_32(~0);
+ fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
+
+#ifdef CONFIG_EXFAT_DELAYED_SYNC
+ fs_sync(sb, false);
+ fs_set_vol_flags(sb, VOL_CLEAN);
+#endif
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+
+#if 0
+/* Not currently wired up */
+static int ffsSetAttr(struct inode *inode, u32 attr)
+{
+ u32 type;
+ int ret = FFS_SUCCESS;
+ sector_t sector = 0;
+ struct dentry_t *ep;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct file_id_t *fid = &(EXFAT_I(inode)->fid);
+ u8 is_dir = (fid->type == TYPE_DIR) ? 1 : 0;
+ struct entry_set_cache_t *es = NULL;
+
+ if (fid->attr == attr) {
+ if (p_fs->dev_ejected)
+ return FFS_MEDIAERR;
+ return FFS_SUCCESS;
+ }
+
+ if (is_dir) {
+ if ((fid->dir.dir == p_fs->root_dir) &&
+ (fid->entry == -1)) {
+ if (p_fs->dev_ejected)
+ return FFS_MEDIAERR;
+ return FFS_SUCCESS;
+ }
+ }
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ /* get the directory entry of given file */
+ if (p_fs->vol_type == EXFAT) {
+ es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry,
+ ES_ALL_ENTRIES, &ep);
+ if (es == NULL) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ } else {
+ ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, §or);
+ if (!ep) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ }
+
+ type = p_fs->fs_func->get_entry_type(ep);
+
+ if (((type == TYPE_FILE) && (attr & ATTR_SUBDIR)) ||
+ ((type == TYPE_DIR) && (!(attr & ATTR_SUBDIR)))) {
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+ else
+ ret = FFS_ERROR;
+
+ if (p_fs->vol_type == EXFAT)
+ release_entry_set(es);
+ goto out;
+ }
+
+ fs_set_vol_flags(sb, VOL_DIRTY);
+
+ /* set the file attribute */
+ fid->attr = attr;
+ p_fs->fs_func->set_entry_attr(ep, attr);
+
+ if (p_fs->vol_type != EXFAT)
+ buf_modify(sb, sector);
+ else {
+ update_dir_checksum_with_entry_set(sb, es);
+ release_entry_set(es);
+ }
+
+#ifdef CONFIG_EXFAT_DELAYED_SYNC
+ fs_sync(sb, false);
+ fs_set_vol_flags(sb, VOL_CLEAN);
+#endif
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+#endif
+
+static int ffsReadStat(struct inode *inode, struct dir_entry_t *info)
+{
+ sector_t sector = 0;
+ s32 count;
+ int ret = FFS_SUCCESS;
+ struct chain_t dir;
+ struct uni_name_t uni_name;
+ struct timestamp_t tm;
+ struct dentry_t *ep, *ep2;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct file_id_t *fid = &(EXFAT_I(inode)->fid);
+ struct entry_set_cache_t *es = NULL;
+ u8 is_dir = (fid->type == TYPE_DIR) ? 1 : 0;
+
+ pr_debug("%s entered\n", __func__);
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ if (is_dir) {
+ if ((fid->dir.dir == p_fs->root_dir) &&
+ (fid->entry == -1)) {
+ info->Attr = ATTR_SUBDIR;
+ memset((char *)&info->CreateTimestamp, 0,
+ sizeof(struct date_time_t));
+ memset((char *)&info->ModifyTimestamp, 0,
+ sizeof(struct date_time_t));
+ memset((char *)&info->AccessTimestamp, 0,
+ sizeof(struct date_time_t));
+ strcpy(info->ShortName, ".");
+ strcpy(info->Name, ".");
+
+ dir.dir = p_fs->root_dir;
+ dir.flags = 0x01;
+
+ if (p_fs->root_dir == CLUSTER_32(0)) {
+ /* FAT16 root_dir */
+ info->Size = p_fs->dentries_in_root <<
+ DENTRY_SIZE_BITS;
+ } else {
+ info->Size = count_num_clusters(sb, &dir) <<
+ p_fs->cluster_size_bits;
+ }
+
+ count = count_dos_name_entries(sb, &dir, TYPE_DIR);
+ if (count < 0) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ info->NumSubdirs = count;
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ }
+
+ /* get the directory entry of given file or directory */
+ if (p_fs->vol_type == EXFAT) {
+ es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry,
+ ES_2_ENTRIES, &ep);
+ if (es == NULL) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ ep2 = ep+1;
+ } else {
+ ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, §or);
+ if (!ep) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ ep2 = ep;
+ buf_lock(sb, sector);
+ }
+
+ /* set FILE_INFO structure using the acquired struct dentry_t */
+ info->Attr = p_fs->fs_func->get_entry_attr(ep);
+
+ p_fs->fs_func->get_entry_time(ep, &tm, TM_CREATE);
+ info->CreateTimestamp.Year = tm.year;
+ info->CreateTimestamp.Month = tm.mon;
+ info->CreateTimestamp.Day = tm.day;
+ info->CreateTimestamp.Hour = tm.hour;
+ info->CreateTimestamp.Minute = tm.min;
+ info->CreateTimestamp.Second = tm.sec;
+ info->CreateTimestamp.MilliSecond = 0;
+
+ p_fs->fs_func->get_entry_time(ep, &tm, TM_MODIFY);
+ info->ModifyTimestamp.Year = tm.year;
+ info->ModifyTimestamp.Month = tm.mon;
+ info->ModifyTimestamp.Day = tm.day;
+ info->ModifyTimestamp.Hour = tm.hour;
+ info->ModifyTimestamp.Minute = tm.min;
+ info->ModifyTimestamp.Second = tm.sec;
+ info->ModifyTimestamp.MilliSecond = 0;
+
+ memset((char *) &info->AccessTimestamp, 0, sizeof(struct date_time_t));
+
+ *(uni_name.name) = 0x0;
+ /* XXX this is very bad for exfat cuz name is already included in es.
+ * API should be revised
+ */
+ p_fs->fs_func->get_uni_name_from_ext_entry(sb, &(fid->dir), fid->entry,
+ uni_name.name);
+ if (*uni_name.name == 0x0 && p_fs->vol_type != EXFAT)
+ get_uni_name_from_dos_entry(sb, (struct dos_dentry_t *)ep,
+ &uni_name, 0x1);
+ nls_uniname_to_cstring(sb, info->Name, &uni_name);
+
+ if (p_fs->vol_type == EXFAT) {
+ info->NumSubdirs = 2;
+ } else {
+ buf_unlock(sb, sector);
+ get_uni_name_from_dos_entry(sb, (struct dos_dentry_t *)ep,
+ &uni_name, 0x0);
+ nls_uniname_to_cstring(sb, info->ShortName, &uni_name);
+ info->NumSubdirs = 0;
+ }
+
+ info->Size = p_fs->fs_func->get_entry_size(ep2);
+
+ if (p_fs->vol_type == EXFAT)
+ release_entry_set(es);
+
+ if (is_dir) {
+ dir.dir = fid->start_clu;
+ dir.flags = 0x01;
+
+ if (info->Size == 0)
+ info->Size = (u64)count_num_clusters(sb, &dir) <<
+ p_fs->cluster_size_bits;
+
+ count = count_dos_name_entries(sb, &dir, TYPE_DIR);
+ if (count < 0) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ info->NumSubdirs += count;
+ }
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ pr_debug("%s exited successfully\n", __func__);
+ return ret;
+}
+
+static int ffsWriteStat(struct inode *inode, struct dir_entry_t *info)
+{
+ sector_t sector = 0;
+ int ret = FFS_SUCCESS;
+ struct timestamp_t tm;
+ struct dentry_t *ep, *ep2;
+ struct entry_set_cache_t *es = NULL;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct file_id_t *fid = &(EXFAT_I(inode)->fid);
+ u8 is_dir = (fid->type == TYPE_DIR) ? 1 : 0;
+
+ pr_debug("%s entered (inode %p info %p\n", __func__, inode, info);
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ if (is_dir) {
+ if ((fid->dir.dir == p_fs->root_dir) &&
+ (fid->entry == -1)) {
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+ ret = FFS_SUCCESS;
+ goto out;
+ }
+ }
+
+ fs_set_vol_flags(sb, VOL_DIRTY);
+
+ /* get the directory entry of given file or directory */
+ if (p_fs->vol_type == EXFAT) {
+ es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry,
+ ES_ALL_ENTRIES, &ep);
+ if (es == NULL) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ ep2 = ep+1;
+ } else {
+ /* for other than exfat */
+ ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, §or);
+ if (!ep) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ ep2 = ep;
+ }
+
+ p_fs->fs_func->set_entry_attr(ep, info->Attr);
+
+ /* set FILE_INFO structure using the acquired struct dentry_t */
+ tm.sec = info->CreateTimestamp.Second;
+ tm.min = info->CreateTimestamp.Minute;
+ tm.hour = info->CreateTimestamp.Hour;
+ tm.day = info->CreateTimestamp.Day;
+ tm.mon = info->CreateTimestamp.Month;
+ tm.year = info->CreateTimestamp.Year;
+ p_fs->fs_func->set_entry_time(ep, &tm, TM_CREATE);
+
+ tm.sec = info->ModifyTimestamp.Second;
+ tm.min = info->ModifyTimestamp.Minute;
+ tm.hour = info->ModifyTimestamp.Hour;
+ tm.day = info->ModifyTimestamp.Day;
+ tm.mon = info->ModifyTimestamp.Month;
+ tm.year = info->ModifyTimestamp.Year;
+ p_fs->fs_func->set_entry_time(ep, &tm, TM_MODIFY);
+
+ p_fs->fs_func->set_entry_size(ep2, info->Size);
+
+ if (p_fs->vol_type != EXFAT) {
+ buf_modify(sb, sector);
+ } else {
+ update_dir_checksum_with_entry_set(sb, es);
+ release_entry_set(es);
+ }
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ pr_debug("%s exited (%d)\n", __func__, ret);
+
+ return ret;
+}
+
+static int ffsMapCluster(struct inode *inode, s32 clu_offset, u32 *clu)
+{
+ s32 num_clusters, num_alloced, modified = FALSE;
+ u32 last_clu;
+ int ret = FFS_SUCCESS;
+ sector_t sector = 0;
+ struct chain_t new_clu;
+ struct dentry_t *ep;
+ struct entry_set_cache_t *es = NULL;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct file_id_t *fid = &(EXFAT_I(inode)->fid);
+
+ /* check the validity of pointer parameters */
+ if (clu == NULL)
+ return FFS_ERROR;
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ fid->rwoffset = (s64)(clu_offset) << p_fs->cluster_size_bits;
+
+ if (EXFAT_I(inode)->mmu_private == 0)
+ num_clusters = 0;
+ else
+ num_clusters = (s32)((EXFAT_I(inode)->mmu_private - 1) >>
+ p_fs->cluster_size_bits) + 1;
+
+ *clu = last_clu = fid->start_clu;
+
+ if (fid->flags == 0x03) {
+ if ((clu_offset > 0) && (*clu != CLUSTER_32(~0))) {
+ last_clu += clu_offset - 1;
+
+ if (clu_offset == num_clusters)
+ *clu = CLUSTER_32(~0);
+ else
+ *clu += clu_offset;
+ }
+ } else {
+ /* hint information */
+ if ((clu_offset > 0) && (fid->hint_last_off > 0) &&
+ (clu_offset >= fid->hint_last_off)) {
+ clu_offset -= fid->hint_last_off;
+ *clu = fid->hint_last_clu;
+ }
+
+ while ((clu_offset > 0) && (*clu != CLUSTER_32(~0))) {
+ last_clu = *clu;
+ if (FAT_read(sb, *clu, clu) == -1) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ clu_offset--;
+ }
+ }
+
+ if (*clu == CLUSTER_32(~0)) {
+ fs_set_vol_flags(sb, VOL_DIRTY);
+
+ new_clu.dir = (last_clu == CLUSTER_32(~0)) ? CLUSTER_32(~0) :
+ last_clu + 1;
+ new_clu.size = 0;
+ new_clu.flags = fid->flags;
+
+ /* (1) allocate a cluster */
+ num_alloced = p_fs->fs_func->alloc_cluster(sb, 1, &new_clu);
+ if (num_alloced < 0) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ } else if (num_alloced == 0) {
+ ret = FFS_FULL;
+ goto out;
+ }
+
+ /* (2) append to the FAT chain */
+ if (last_clu == CLUSTER_32(~0)) {
+ if (new_clu.flags == 0x01)
+ fid->flags = 0x01;
+ fid->start_clu = new_clu.dir;
+ modified = TRUE;
+ } else {
+ if (new_clu.flags != fid->flags) {
+ exfat_chain_cont_cluster(sb, fid->start_clu,
+ num_clusters);
+ fid->flags = 0x01;
+ modified = TRUE;
+ }
+ if (new_clu.flags == 0x01)
+ FAT_write(sb, last_clu, new_clu.dir);
+ }
+
+ num_clusters += num_alloced;
+ *clu = new_clu.dir;
+
+ if (p_fs->vol_type == EXFAT) {
+ es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
+ ES_ALL_ENTRIES, &ep);
+ if (es == NULL) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ /* get stream entry */
+ ep++;
+ }
+
+ /* (3) update directory entry */
+ if (modified) {
+ if (p_fs->vol_type != EXFAT) {
+ ep = get_entry_in_dir(sb, &(fid->dir),
+ fid->entry, §or);
+ if (!ep) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ }
+
+ if (p_fs->fs_func->get_entry_flag(ep) != fid->flags)
+ p_fs->fs_func->set_entry_flag(ep, fid->flags);
+
+ if (p_fs->fs_func->get_entry_clu0(ep) != fid->start_clu)
+ p_fs->fs_func->set_entry_clu0(ep,
+ fid->start_clu);
+
+ if (p_fs->vol_type != EXFAT)
+ buf_modify(sb, sector);
+ }
+
+ if (p_fs->vol_type == EXFAT) {
+ update_dir_checksum_with_entry_set(sb, es);
+ release_entry_set(es);
+ }
+
+ /* add number of new blocks to inode */
+ inode->i_blocks += num_alloced << (p_fs->cluster_size_bits - 9);
+ }
+
+ /* hint information */
+ fid->hint_last_off = (s32)(fid->rwoffset >> p_fs->cluster_size_bits);
+ fid->hint_last_clu = *clu;
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+
+/*----------------------------------------------------------------------*/
+/* Directory Operation Functions */
+/*----------------------------------------------------------------------*/
+
+static int ffsCreateDir(struct inode *inode, char *path, struct file_id_t *fid)
+{
+ int ret = FFS_SUCCESS;
+ struct chain_t dir;
+ struct uni_name_t uni_name;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ pr_debug("%s entered\n", __func__);
+
+ /* check the validity of pointer parameters */
+ if ((fid == NULL) || (path == NULL) || (*path == '\0'))
+ return FFS_ERROR;
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ /* check the validity of directory name in the given old pathname */
+ ret = resolve_path(inode, path, &dir, &uni_name);
+ if (ret)
+ goto out;
+
+ fs_set_vol_flags(sb, VOL_DIRTY);
+
+ ret = create_dir(inode, &dir, &uni_name, fid);
+
+#ifdef CONFIG_EXFAT_DELAYED_SYNC
+ fs_sync(sb, false);
+ fs_set_vol_flags(sb, VOL_CLEAN);
+#endif
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+
+static int ffsReadDir(struct inode *inode, struct dir_entry_t *dir_entry)
+{
+ int i, dentry, clu_offset;
+ int ret = FFS_SUCCESS;
+ s32 dentries_per_clu, dentries_per_clu_bits = 0;
+ u32 type;
+ sector_t sector;
+ struct chain_t dir, clu;
+ struct uni_name_t uni_name;
+ struct timestamp_t tm;
+ struct dentry_t *ep;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct fs_func *fs_func = p_fs->fs_func;
+ struct file_id_t *fid = &(EXFAT_I(inode)->fid);
+
+ /* check the validity of pointer parameters */
+ if (dir_entry == NULL)
+ return FFS_ERROR;
+
+ /* check if the given file ID is opened */
+ if (fid->type != TYPE_DIR)
+ return FFS_PERMISSIONERR;
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ if (fid->entry == -1) {
+ dir.dir = p_fs->root_dir;
+ dir.flags = 0x01;
+ } else {
+ dir.dir = fid->start_clu;
+ dir.size = (s32)(fid->size >> p_fs->cluster_size_bits);
+ dir.flags = fid->flags;
+ }
+
+ dentry = (s32)fid->rwoffset;
+
+ if (dir.dir == CLUSTER_32(0)) {
+ /* FAT16 root_dir */
+ dentries_per_clu = p_fs->dentries_in_root;
+
+ if (dentry == dentries_per_clu) {
+ clu.dir = CLUSTER_32(~0);
+ } else {
+ clu.dir = dir.dir;
+ clu.size = dir.size;
+ clu.flags = dir.flags;
+ }
+ } else {
+ dentries_per_clu = p_fs->dentries_per_clu;
+ dentries_per_clu_bits = ilog2(dentries_per_clu);
+
+ clu_offset = dentry >> dentries_per_clu_bits;
+ clu.dir = dir.dir;
+ clu.size = dir.size;
+ clu.flags = dir.flags;
+
+ if (clu.flags == 0x03) {
+ clu.dir += clu_offset;
+ clu.size -= clu_offset;
+ } else {
+ /* hint_information */
+ if ((clu_offset > 0) && (fid->hint_last_off > 0) &&
+ (clu_offset >= fid->hint_last_off)) {
+ clu_offset -= fid->hint_last_off;
+ clu.dir = fid->hint_last_clu;
+ }
+
+ while (clu_offset > 0) {
+ /* clu.dir = FAT_read(sb, clu.dir); */
+ if (FAT_read(sb, clu.dir, &clu.dir) == -1) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ clu_offset--;
+ }
+ }
+ }
+
+ while (clu.dir != CLUSTER_32(~0)) {
+ if (p_fs->dev_ejected)
+ break;
+
+ if (dir.dir == CLUSTER_32(0)) /* FAT16 root_dir */
+ i = dentry % dentries_per_clu;
+ else
+ i = dentry & (dentries_per_clu-1);
+
+ for ( ; i < dentries_per_clu; i++, dentry++) {
+ ep = get_entry_in_dir(sb, &clu, i, §or);
+ if (!ep) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ type = fs_func->get_entry_type(ep);
+
+ if (type == TYPE_UNUSED)
+ break;
+
+ if ((type != TYPE_FILE) && (type != TYPE_DIR))
+ continue;
+
+ buf_lock(sb, sector);
+ dir_entry->Attr = fs_func->get_entry_attr(ep);
+
+ fs_func->get_entry_time(ep, &tm, TM_CREATE);
+ dir_entry->CreateTimestamp.Year = tm.year;
+ dir_entry->CreateTimestamp.Month = tm.mon;
+ dir_entry->CreateTimestamp.Day = tm.day;
+ dir_entry->CreateTimestamp.Hour = tm.hour;
+ dir_entry->CreateTimestamp.Minute = tm.min;
+ dir_entry->CreateTimestamp.Second = tm.sec;
+ dir_entry->CreateTimestamp.MilliSecond = 0;
+
+ fs_func->get_entry_time(ep, &tm, TM_MODIFY);
+ dir_entry->ModifyTimestamp.Year = tm.year;
+ dir_entry->ModifyTimestamp.Month = tm.mon;
+ dir_entry->ModifyTimestamp.Day = tm.day;
+ dir_entry->ModifyTimestamp.Hour = tm.hour;
+ dir_entry->ModifyTimestamp.Minute = tm.min;
+ dir_entry->ModifyTimestamp.Second = tm.sec;
+ dir_entry->ModifyTimestamp.MilliSecond = 0;
+
+ memset((char *)&dir_entry->AccessTimestamp, 0,
+ sizeof(struct date_time_t));
+
+ *(uni_name.name) = 0x0;
+ fs_func->get_uni_name_from_ext_entry(sb, &dir, dentry,
+ uni_name.name);
+ if (*uni_name.name == 0x0 && p_fs->vol_type != EXFAT)
+ get_uni_name_from_dos_entry(sb,
+ (struct dos_dentry_t *)ep,
+ &uni_name, 0x1);
+ nls_uniname_to_cstring(sb, dir_entry->Name, &uni_name);
+ buf_unlock(sb, sector);
+
+ if (p_fs->vol_type == EXFAT) {
+ ep = get_entry_in_dir(sb, &clu, i+1, NULL);
+ if (!ep) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ } else {
+ get_uni_name_from_dos_entry(sb,
+ (struct dos_dentry_t *)ep,
+ &uni_name, 0x0);
+ nls_uniname_to_cstring(sb, dir_entry->ShortName,
+ &uni_name);
+ }
+
+ dir_entry->Size = fs_func->get_entry_size(ep);
+
+ /* hint information */
+ if (dir.dir == CLUSTER_32(0)) { /* FAT16 root_dir */
+ } else {
+ fid->hint_last_off = dentry >>
+ dentries_per_clu_bits;
+ fid->hint_last_clu = clu.dir;
+ }
+
+ fid->rwoffset = (s64) ++dentry;
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+
+ if (dir.dir == CLUSTER_32(0))
+ break; /* FAT16 root_dir */
+
+ if (clu.flags == 0x03) {
+ if ((--clu.size) > 0)
+ clu.dir++;
+ else
+ clu.dir = CLUSTER_32(~0);
+ } else {
+ /* clu.dir = FAT_read(sb, clu.dir); */
+ if (FAT_read(sb, clu.dir, &clu.dir) == -1) {
+ ret = FFS_MEDIAERR;
+ goto out;
+ }
+ }
+ }
+
+ *(dir_entry->Name) = '\0';
+
+ fid->rwoffset = (s64) ++dentry;
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+
+static int ffsRemoveDir(struct inode *inode, struct file_id_t *fid)
+{
+ s32 dentry;
+ int ret = FFS_SUCCESS;
+ struct chain_t dir, clu_to_free;
+ struct super_block *sb = inode->i_sb;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ /* check the validity of the given file id */
+ if (fid == NULL)
+ return FFS_INVALIDFID;
+
+ dir.dir = fid->dir.dir;
+ dir.size = fid->dir.size;
+ dir.flags = fid->dir.flags;
+
+ dentry = fid->entry;
+
+ /* check if the file is "." or ".." */
+ if (p_fs->vol_type != EXFAT) {
+ if ((dir.dir != p_fs->root_dir) && (dentry < 2))
+ return FFS_PERMISSIONERR;
+ }
+
+ /* acquire the lock for file system critical section */
+ down(&p_fs->v_sem);
+
+ clu_to_free.dir = fid->start_clu;
+ clu_to_free.size = (s32)((fid->size-1) >> p_fs->cluster_size_bits) + 1;
+ clu_to_free.flags = fid->flags;
+
+ if (!is_dir_empty(sb, &clu_to_free)) {
+ ret = FFS_FILEEXIST;
+ goto out;
+ }
+
+ fs_set_vol_flags(sb, VOL_DIRTY);
+
+ /* (1) update the directory entry */
+ remove_file(inode, &dir, dentry);
+
+ /* (2) free the clusters */
+ p_fs->fs_func->free_cluster(sb, &clu_to_free, 1);
+
+ fid->size = 0;
+ fid->start_clu = CLUSTER_32(~0);
+ fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
+
+#ifdef CONFIG_EXFAT_DELAYED_SYNC
+ fs_sync(sb, false);
+ fs_set_vol_flags(sb, VOL_CLEAN);
+#endif
+
+ if (p_fs->dev_ejected)
+ ret = FFS_MEDIAERR;
+
+out:
+ /* release the lock for file system critical section */
+ up(&p_fs->v_sem);
+
+ return ret;
+}
+
+/*======================================================================*/
+/* Directory Entry Operations */
+/*======================================================================*/
+
+static int exfat_readdir(struct file *filp, struct dir_context *ctx)
+{
+ struct inode *inode = file_inode(filp);
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct fs_info_t *p_fs = &(sbi->fs_info);
+ struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
+ struct dir_entry_t de;
+ unsigned long inum;
+ loff_t cpos;
+ int err = 0;
+
+ __lock_super(sb);
+
+ cpos = ctx->pos;
+ /* Fake . and .. for the root directory. */
+ if ((p_fs->vol_type == EXFAT) || (inode->i_ino == EXFAT_ROOT_INO)) {
+ while (cpos < 2) {
+ if (inode->i_ino == EXFAT_ROOT_INO)
+ inum = EXFAT_ROOT_INO;
+ else if (cpos == 0)
+ inum = inode->i_ino;
+ else /* (cpos == 1) */
+ inum = parent_ino(filp->f_path.dentry);
+
+ if (!dir_emit_dots(filp, ctx))
+ goto out;
+ cpos++;
+ ctx->pos++;
+ }
+ if (cpos == 2)
+ cpos = 0;
+ }
+ if (cpos & (DENTRY_SIZE - 1)) {
+ err = -ENOENT;
+ goto out;
+ }
+
+get_new:
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+ EXFAT_I(inode)->fid.rwoffset = cpos >> DENTRY_SIZE_BITS;
+
+ err = ffsReadDir(inode, &de);
+ if (err) {
+ /* at least we tried to read a sector
+ * move cpos to next sector position (should be aligned)
+ */
+ if (err == FFS_MEDIAERR) {
+ cpos += 1 << p_bd->sector_size_bits;
+ cpos &= ~((1 << p_bd->sector_size_bits)-1);
+ }
+
+ err = -EIO;
+ goto end_of_dir;
+ }
+
+ cpos = EXFAT_I(inode)->fid.rwoffset << DENTRY_SIZE_BITS;
+
+ if (!de.Name[0])
+ goto end_of_dir;
+
+ if (!memcmp(de.ShortName, DOS_CUR_DIR_NAME, DOS_NAME_LENGTH)) {
+ inum = inode->i_ino;
+ } else if (!memcmp(de.ShortName, DOS_PAR_DIR_NAME, DOS_NAME_LENGTH)) {
+ inum = parent_ino(filp->f_path.dentry);
+ } else {
+ loff_t i_pos = ((loff_t) EXFAT_I(inode)->fid.start_clu << 32) |
+ ((EXFAT_I(inode)->fid.rwoffset-1) & 0xffffffff);
+ struct inode *tmp = exfat_iget(sb, i_pos);
+
+ if (tmp) {
+ inum = tmp->i_ino;
+ iput(tmp);
+ } else {
+ inum = iunique(sb, EXFAT_ROOT_INO);
+ }
+ }
+
+ if (!dir_emit(ctx, de.Name, strlen(de.Name), inum,
+ (de.Attr & ATTR_SUBDIR) ? DT_DIR : DT_REG))
+ goto out;
+
+ ctx->pos = cpos;
+ goto get_new;
+
+end_of_dir:
+ ctx->pos = cpos;
+out:
+ __unlock_super(sb);
+ return err;
+}
+
+static int exfat_ioctl_volume_id(struct inode *dir)
+{
+ struct super_block *sb = dir->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct fs_info_t *p_fs = &(sbi->fs_info);
+
+ return p_fs->vol_id;
+}
+
+static long exfat_generic_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+struct inode *inode = filp->f_path.dentry->d_inode;
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ unsigned int flags;
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+
+ switch (cmd) {
+ case EXFAT_IOCTL_GET_VOLUME_ID:
+ return exfat_ioctl_volume_id(inode);
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ case EXFAT_IOC_GET_DEBUGFLAGS: {
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+
+ flags = sbi->debug_flags;
+ return put_user(flags, (int __user *)arg);
+ }
+ case EXFAT_IOC_SET_DEBUGFLAGS: {
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (get_user(flags, (int __user *) arg))
+ return -EFAULT;
+
+ __lock_super(sb);
+ sbi->debug_flags = flags;
+ __unlock_super(sb);
+
+ return 0;
+ }
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+ default:
+ return -ENOTTY; /* Inappropriate ioctl for device */
+ }
+}
+
+static const struct file_operations exfat_dir_operations = {
+ .llseek = generic_file_llseek,
+ .read = generic_read_dir,
+ .iterate = exfat_readdir,
+ .unlocked_ioctl = exfat_generic_ioctl,
+ .fsync = generic_file_fsync,
+};
+
+static int exfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool excl)
+{
+ struct super_block *sb = dir->i_sb;
+ struct inode *inode;
+ struct file_id_t fid;
+ loff_t i_pos;
+ int err;
+
+ __lock_super(sb);
+
+ pr_debug("%s entered\n", __func__);
+
+ err = ffsCreateFile(dir, (u8 *) dentry->d_name.name, FM_REGULAR, &fid);
+ if (err) {
+ if (err == FFS_INVALIDPATH)
+ err = -EINVAL;
+ else if (err == FFS_FILEEXIST)
+ err = -EEXIST;
+ else if (err == FFS_FULL)
+ err = -ENOSPC;
+ else if (err == FFS_NAMETOOLONG)
+ err = -ENAMETOOLONG;
+ else
+ err = -EIO;
+ goto out;
+ }
+ INC_IVERSION(dir);
+ dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir);
+ if (IS_DIRSYNC(dir))
+ (void) exfat_sync_inode(dir);
+ else
+ mark_inode_dirty(dir);
+
+ i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff);
+
+ inode = exfat_build_inode(sb, &fid, i_pos);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out;
+ }
+ INC_IVERSION(inode);
+ inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
+ /*
+ * timestamp is already written, so mark_inode_dirty() is unnecessary.
+ */
+
+ dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
+ d_instantiate(dentry, inode);
+
+out:
+ __unlock_super(sb);
+ pr_debug("%s exited\n", __func__);
+ return err;
+}
+
+static int exfat_find(struct inode *dir, struct qstr *qname,
+ struct file_id_t *fid)
+{
+ int err;
+
+ if (qname->len == 0)
+ return -ENOENT;
+
+ err = ffsLookupFile(dir, (u8 *) qname->name, fid);
+ if (err)
+ return -ENOENT;
+
+ return 0;
+}
+
+static int exfat_d_anon_disconn(struct dentry *dentry)
+{
+ return IS_ROOT(dentry) && (dentry->d_flags & DCACHE_DISCONNECTED);
+}
+
+static struct dentry *exfat_lookup(struct inode *dir, struct dentry *dentry,
+ unsigned int flags)
+{
+ struct super_block *sb = dir->i_sb;
+ struct inode *inode;
+ struct dentry *alias;
+ int err;
+ struct file_id_t fid;
+ loff_t i_pos;
+ u64 ret;
+ mode_t i_mode;
+
+ __lock_super(sb);
+ pr_debug("%s entered\n", __func__);
+ err = exfat_find(dir, &dentry->d_name, &fid);
+ if (err) {
+ if (err == -ENOENT) {
+ inode = NULL;
+ goto out;
+ }
+ goto error;
+ }
+
+ i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff);
+ inode = exfat_build_inode(sb, &fid, i_pos);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto error;
+ }
+
+ i_mode = inode->i_mode;
+ if (S_ISLNK(i_mode) && !EXFAT_I(inode)->target) {
+ EXFAT_I(inode)->target = kmalloc(i_size_read(inode) + 1,
+ GFP_KERNEL);
+ if (!EXFAT_I(inode)->target) {
+ err = -ENOMEM;
+ goto error;
+ }
+ ffsReadFile(dir, &fid, EXFAT_I(inode)->target,
+ i_size_read(inode), &ret);
+ *(EXFAT_I(inode)->target + i_size_read(inode)) = '\0';
+ }
+
+ alias = d_find_alias(inode);
+ if (alias && !exfat_d_anon_disconn(alias)) {
+ BUG_ON(d_unhashed(alias));
+ if (!S_ISDIR(i_mode))
+ d_move(alias, dentry);
+ iput(inode);
+ __unlock_super(sb);
+ pr_debug("%s exited 1\n", __func__);
+ return alias;
+ }
+ dput(alias);
+out:
+ __unlock_super(sb);
+ dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
+ dentry = d_splice_alias(inode, dentry);
+ if (dentry)
+ dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
+ pr_debug("%s exited 2\n", __func__);
+ return dentry;
+
+error:
+ __unlock_super(sb);
+ pr_debug("%s exited 3\n", __func__);
+ return ERR_PTR(err);
+}
+
+static inline unsigned long exfat_hash(loff_t i_pos)
+{
+ return hash_32(i_pos, EXFAT_HASH_BITS);
+}
+
+static void exfat_attach(struct inode *inode, loff_t i_pos)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
+ struct hlist_head *head = sbi->inode_hashtable + exfat_hash(i_pos);
+
+ spin_lock(&sbi->inode_hash_lock);
+ EXFAT_I(inode)->i_pos = i_pos;
+ hlist_add_head(&EXFAT_I(inode)->i_hash_fat, head);
+ spin_unlock(&sbi->inode_hash_lock);
+}
+
+static void exfat_detach(struct inode *inode)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
+
+ spin_lock(&sbi->inode_hash_lock);
+ hlist_del_init(&EXFAT_I(inode)->i_hash_fat);
+ EXFAT_I(inode)->i_pos = 0;
+ spin_unlock(&sbi->inode_hash_lock);
+}
+
+static int exfat_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct inode *inode = dentry->d_inode;
+ struct super_block *sb = dir->i_sb;
+ int err;
+
+ __lock_super(sb);
+
+ pr_debug("%s entered\n", __func__);
+
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+
+ err = ffsRemoveFile(dir, &(EXFAT_I(inode)->fid));
+ if (err) {
+ if (err == FFS_PERMISSIONERR)
+ err = -EPERM;
+ else
+ err = -EIO;
+ goto out;
+ }
+ INC_IVERSION(dir);
+ dir->i_mtime = dir->i_atime = current_time(dir);
+ if (IS_DIRSYNC(dir))
+ (void) exfat_sync_inode(dir);
+ else
+ mark_inode_dirty(dir);
+
+ clear_nlink(inode);
+ inode->i_mtime = inode->i_atime = current_time(inode);
+ exfat_detach(inode);
+ remove_inode_hash(inode);
+
+out:
+ __unlock_super(sb);
+ pr_debug("%s exited\n", __func__);
+ return err;
+}
+
+static int exfat_symlink(struct inode *dir, struct dentry *dentry,
+ const char *target)
+{
+ struct super_block *sb = dir->i_sb;
+ struct inode *inode;
+ struct file_id_t fid;
+ loff_t i_pos;
+ int err;
+ u64 len = (u64) strlen(target);
+ u64 ret;
+
+ __lock_super(sb);
+
+ pr_debug("%s entered\n", __func__);
+
+ err = ffsCreateFile(dir, (u8 *) dentry->d_name.name, FM_SYMLINK, &fid);
+ if (err) {
+ if (err == FFS_INVALIDPATH)
+ err = -EINVAL;
+ else if (err == FFS_FILEEXIST)
+ err = -EEXIST;
+ else if (err == FFS_FULL)
+ err = -ENOSPC;
+ else
+ err = -EIO;
+ goto out;
+ }
+
+ err = ffsWriteFile(dir, &fid, (char *) target, len, &ret);
+
+ if (err) {
+ ffsRemoveFile(dir, &fid);
+
+ if (err == FFS_FULL)
+ err = -ENOSPC;
+ else
+ err = -EIO;
+ goto out;
+ }
+
+ INC_IVERSION(dir);
+ dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir);
+ if (IS_DIRSYNC(dir))
+ (void) exfat_sync_inode(dir);
+ else
+ mark_inode_dirty(dir);
+
+ i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff);
+
+ inode = exfat_build_inode(sb, &fid, i_pos);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out;
+ }
+ INC_IVERSION(inode);
+ inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
+ /* timestamp is already written, so mark_inode_dirty() is unneeded. */
+
+ EXFAT_I(inode)->target = kmalloc(len+1, GFP_KERNEL);
+ if (!EXFAT_I(inode)->target) {
+ err = -ENOMEM;
+ goto out;
+ }
+ memcpy(EXFAT_I(inode)->target, target, len+1);
+
+ dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
+ d_instantiate(dentry, inode);
+
+out:
+ __unlock_super(sb);
+ pr_debug("%s exited\n", __func__);
+ return err;
+}
+
+static int exfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct super_block *sb = dir->i_sb;
+ struct inode *inode;
+ struct file_id_t fid;
+ loff_t i_pos;
+ int err;
+
+ __lock_super(sb);
+
+ pr_debug("%s entered\n", __func__);
+
+ err = ffsCreateDir(dir, (u8 *) dentry->d_name.name, &fid);
+ if (err) {
+ if (err == FFS_INVALIDPATH)
+ err = -EINVAL;
+ else if (err == FFS_FILEEXIST)
+ err = -EEXIST;
+ else if (err == FFS_FULL)
+ err = -ENOSPC;
+ else if (err == FFS_NAMETOOLONG)
+ err = -ENAMETOOLONG;
+ else
+ err = -EIO;
+ goto out;
+ }
+ INC_IVERSION(dir);
+ dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir);
+ if (IS_DIRSYNC(dir))
+ (void) exfat_sync_inode(dir);
+ else
+ mark_inode_dirty(dir);
+ inc_nlink(dir);
+
+ i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff);
+
+ inode = exfat_build_inode(sb, &fid, i_pos);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out;
+ }
+ INC_IVERSION(inode);
+ inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
+ /* timestamp is already written, so mark_inode_dirty() is unneeded. */
+
+ dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
+ d_instantiate(dentry, inode);
+
+out:
+ __unlock_super(sb);
+ pr_debug("%s exited\n", __func__);
+ return err;
+}
+
+static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ struct inode *inode = dentry->d_inode;
+ struct super_block *sb = dir->i_sb;
+ int err;
+
+ __lock_super(sb);
+
+ pr_debug("%s entered\n", __func__);
+
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+
+ err = ffsRemoveDir(dir, &(EXFAT_I(inode)->fid));
+ if (err) {
+ if (err == FFS_INVALIDPATH)
+ err = -EINVAL;
+ else if (err == FFS_FILEEXIST)
+ err = -ENOTEMPTY;
+ else if (err == FFS_NOTFOUND)
+ err = -ENOENT;
+ else if (err == FFS_DIRBUSY)
+ err = -EBUSY;
+ else
+ err = -EIO;
+ goto out;
+ }
+ INC_IVERSION(dir);
+ dir->i_mtime = dir->i_atime = current_time(dir);
+ if (IS_DIRSYNC(dir))
+ (void) exfat_sync_inode(dir);
+ else
+ mark_inode_dirty(dir);
+ drop_nlink(dir);
+
+ clear_nlink(inode);
+ inode->i_mtime = inode->i_atime = current_time(inode);
+ exfat_detach(inode);
+ remove_inode_hash(inode);
+
+out:
+ __unlock_super(sb);
+ pr_debug("%s exited\n", __func__);
+ return err;
+}
+
+static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry,
+ unsigned int flags)
+{
+ struct inode *old_inode, *new_inode;
+ struct super_block *sb = old_dir->i_sb;
+ loff_t i_pos;
+ int err;
+
+ if (flags)
+ return -EINVAL;
+
+ __lock_super(sb);
+
+ pr_debug("%s entered\n", __func__);
+
+ old_inode = old_dentry->d_inode;
+ new_inode = new_dentry->d_inode;
+
+ EXFAT_I(old_inode)->fid.size = i_size_read(old_inode);
+
+ err = ffsMoveFile(old_dir, &(EXFAT_I(old_inode)->fid), new_dir,
+ new_dentry);
+ if (err) {
+ if (err == FFS_PERMISSIONERR)
+ err = -EPERM;
+ else if (err == FFS_INVALIDPATH)
+ err = -EINVAL;
+ else if (err == FFS_FILEEXIST)
+ err = -EEXIST;
+ else if (err == FFS_NOTFOUND)
+ err = -ENOENT;
+ else if (err == FFS_FULL)
+ err = -ENOSPC;
+ else
+ err = -EIO;
+ goto out;
+ }
+ INC_IVERSION(new_dir);
+ new_dir->i_ctime = new_dir->i_mtime = new_dir->i_atime =
+ current_time(new_dir);
+ if (IS_DIRSYNC(new_dir))
+ (void) exfat_sync_inode(new_dir);
+ else
+ mark_inode_dirty(new_dir);
+
+ i_pos = ((loff_t) EXFAT_I(old_inode)->fid.dir.dir << 32) |
+ (EXFAT_I(old_inode)->fid.entry & 0xffffffff);
+
+ exfat_detach(old_inode);
+ exfat_attach(old_inode, i_pos);
+ if (IS_DIRSYNC(new_dir))
+ (void) exfat_sync_inode(old_inode);
+ else
+ mark_inode_dirty(old_inode);
+
+ if ((S_ISDIR(old_inode->i_mode)) && (old_dir != new_dir)) {
+ drop_nlink(old_dir);
+ if (!new_inode)
+ inc_nlink(new_dir);
+ }
+ INC_IVERSION(old_dir);
+ old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
+ if (IS_DIRSYNC(old_dir))
+ (void) exfat_sync_inode(old_dir);
+ else
+ mark_inode_dirty(old_dir);
+
+ if (new_inode) {
+ exfat_detach(new_inode);
+ drop_nlink(new_inode);
+ if (S_ISDIR(new_inode->i_mode))
+ drop_nlink(new_inode);
+ new_inode->i_ctime = current_time(new_inode);
+ }
+
+out:
+ __unlock_super(sb);
+ pr_debug("%s exited\n", __func__);
+ return err;
+}
+
+static int exfat_cont_expand(struct inode *inode, loff_t size)
+{
+ struct address_space *mapping = inode->i_mapping;
+ loff_t start = i_size_read(inode), count = size - i_size_read(inode);
+ int err, err2;
+
+ err = generic_cont_expand_simple(inode, size);
+ if (err != 0)
+ return err;
+
+ inode->i_ctime = inode->i_mtime = current_time(inode);
+ mark_inode_dirty(inode);
+
+ if (IS_SYNC(inode)) {
+ err = filemap_fdatawrite_range(mapping, start,
+ start + count - 1);
+ err2 = sync_mapping_buffers(mapping);
+ err = (err) ? (err) : (err2);
+ err2 = write_inode_now(inode, 1);
+ err = (err) ? (err) : (err2);
+ if (!err)
+ err = filemap_fdatawait_range(mapping, start,
+ start + count - 1);
+ }
+ return err;
+}
+
+static int exfat_allow_set_time(struct exfat_sb_info *sbi, struct inode *inode)
+{
+ mode_t allow_utime = sbi->options.allow_utime;
+
+ if (!uid_eq(current_fsuid(), inode->i_uid)) {
+ if (in_group_p(inode->i_gid))
+ allow_utime >>= 3;
+ if (allow_utime & MAY_WRITE)
+ return 1;
+ }
+
+ /* use a default check */
+ return 0;
+}
+
+static int exfat_sanitize_mode(const struct exfat_sb_info *sbi,
+ struct inode *inode, umode_t *mode_ptr)
+{
+ mode_t i_mode, mask, perm;
+
+ i_mode = inode->i_mode;
+
+ if (S_ISREG(i_mode) || S_ISLNK(i_mode))
+ mask = sbi->options.fs_fmask;
+ else
+ mask = sbi->options.fs_dmask;
+
+ perm = *mode_ptr & ~(S_IFMT | mask);
+
+ /* Of the r and x bits, all (subject to umask) must be present.*/
+ if ((perm & 0555) != (i_mode & 0555))
+ return -EPERM;
+
+ if (exfat_mode_can_hold_ro(inode)) {
+ /*
+ * Of the w bits, either all (subject to umask) or none must be
+ * present.
+ */
+ if ((perm & 0222) && ((perm & 0222) != (0222 & ~mask)))
+ return -EPERM;
+ } else {
+ /*
+ * If exfat_mode_can_hold_ro(inode) is false, can't change w
+ * bits.
+ */
+ if ((perm & 0222) != (0222 & ~mask))
+ return -EPERM;
+ }
+
+ *mode_ptr &= S_IFMT | perm;
+
+ return 0;
+}
+
+static void exfat_truncate(struct inode *inode, loff_t old_size)
+{
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct fs_info_t *p_fs = &(sbi->fs_info);
+ int err;
+
+ __lock_super(sb);
+
+ /*
+ * This protects against truncating a file bigger than it was then
+ * trying to write into the hole.
+ */
+ if (EXFAT_I(inode)->mmu_private > i_size_read(inode))
+ EXFAT_I(inode)->mmu_private = i_size_read(inode);
+
+ if (EXFAT_I(inode)->fid.start_clu == 0)
+ goto out;
+
+ err = ffsTruncateFile(inode, old_size, i_size_read(inode));
+ if (err)
+ goto out;
+
+ inode->i_ctime = inode->i_mtime = current_time(inode);
+ if (IS_DIRSYNC(inode))
+ (void) exfat_sync_inode(inode);
+ else
+ mark_inode_dirty(inode);
+
+ inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1)) &
+ ~((loff_t)p_fs->cluster_size - 1)) >> 9;
+out:
+ __unlock_super(sb);
+}
+
+static int exfat_setattr(struct dentry *dentry, struct iattr *attr)
+{
+
+ struct exfat_sb_info *sbi = EXFAT_SB(dentry->d_sb);
+ struct inode *inode = dentry->d_inode;
+ unsigned int ia_valid;
+ int error;
+ loff_t old_size;
+
+ pr_debug("%s entered\n", __func__);
+
+ if ((attr->ia_valid & ATTR_SIZE)
+ && (attr->ia_size > i_size_read(inode))) {
+ error = exfat_cont_expand(inode, attr->ia_size);
+ if (error || attr->ia_valid == ATTR_SIZE)
+ return error;
+ attr->ia_valid &= ~ATTR_SIZE;
+ }
+
+ ia_valid = attr->ia_valid;
+
+ if ((ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET))
+ && exfat_allow_set_time(sbi, inode)) {
+ attr->ia_valid &= ~(ATTR_MTIME_SET |
+ ATTR_ATIME_SET |
+ ATTR_TIMES_SET);
+ }
+
+ error = setattr_prepare(dentry, attr);
+ attr->ia_valid = ia_valid;
+ if (error)
+ return error;
+
+ if (((attr->ia_valid & ATTR_UID) &&
+ (!uid_eq(attr->ia_uid, sbi->options.fs_uid))) ||
+ ((attr->ia_valid & ATTR_GID) &&
+ (!gid_eq(attr->ia_gid, sbi->options.fs_gid))) ||
+ ((attr->ia_valid & ATTR_MODE) &&
+ (attr->ia_mode & ~(S_IFREG | S_IFLNK | S_IFDIR | 0777)))) {
+ return -EPERM;
+ }
+
+ /*
+ * We don't return -EPERM here. Yes, strange, but this is too
+ * old behavior.
+ */
+ if (attr->ia_valid & ATTR_MODE) {
+ if (exfat_sanitize_mode(sbi, inode, &attr->ia_mode) < 0)
+ attr->ia_valid &= ~ATTR_MODE;
+ }
+
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+
+ if (attr->ia_valid & ATTR_SIZE) {
+ old_size = i_size_read(inode);
+ down_write(&EXFAT_I(inode)->truncate_lock);
+ truncate_setsize(inode, attr->ia_size);
+ exfat_truncate(inode, old_size);
+ up_write(&EXFAT_I(inode)->truncate_lock);
+ }
+ setattr_copy(inode, attr);
+ mark_inode_dirty(inode);
+
+ pr_debug("%s exited\n", __func__);
+ return error;
+}
+
+static int exfat_getattr(const struct path *path, struct kstat *stat,
+ u32 request_mask, unsigned int flags)
+{
+ struct inode *inode = path->dentry->d_inode;
+
+ pr_debug("%s entered\n", __func__);
+
+ generic_fillattr(inode, stat);
+ stat->blksize = EXFAT_SB(inode->i_sb)->fs_info.cluster_size;
+
+ pr_debug("%s exited\n", __func__);
+ return 0;
+}
+
+static const struct inode_operations exfat_dir_inode_operations = {
+ .create = exfat_create,
+ .lookup = exfat_lookup,
+ .unlink = exfat_unlink,
+ .symlink = exfat_symlink,
+ .mkdir = exfat_mkdir,
+ .rmdir = exfat_rmdir,
+ .rename = exfat_rename,
+ .setattr = exfat_setattr,
+ .getattr = exfat_getattr,
+};
+
+/*======================================================================*/
+/* File Operations */
+/*======================================================================*/
+static const char *exfat_get_link(struct dentry *dentry, struct inode *inode,
+ struct delayed_call *done)
+{
+ struct exfat_inode_info *ei = EXFAT_I(inode);
+
+ if (ei->target != NULL) {
+ char *cookie = ei->target;
+
+ if (cookie != NULL)
+ return (char *)(ei->target);
+ }
+ return NULL;
+}
+
+static const struct inode_operations exfat_symlink_inode_operations = {
+ .get_link = exfat_get_link,
+};
+
+static int exfat_file_release(struct inode *inode, struct file *filp)
+{
+ struct super_block *sb = inode->i_sb;
+
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+ ffsSyncVol(sb, false);
+ return 0;
+}
+
+static const struct file_operations exfat_file_operations = {
+ .llseek = generic_file_llseek,
+ .read_iter = generic_file_read_iter,
+ .write_iter = generic_file_write_iter,
+ .mmap = generic_file_mmap,
+ .release = exfat_file_release,
+ .unlocked_ioctl = exfat_generic_ioctl,
+ .fsync = generic_file_fsync,
+ .splice_read = generic_file_splice_read,
+};
+
+static const struct inode_operations exfat_file_inode_operations = {
+ .setattr = exfat_setattr,
+ .getattr = exfat_getattr,
+};
+
+/*======================================================================*/
+/* Address Space Operations */
+/*======================================================================*/
+
+static int exfat_bmap(struct inode *inode, sector_t sector, sector_t *phys,
+ unsigned long *mapped_blocks, int *create)
+{
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct fs_info_t *p_fs = &(sbi->fs_info);
+ struct bd_info_t *p_bd = &(sbi->bd_info);
+ const unsigned long blocksize = sb->s_blocksize;
+ const unsigned char blocksize_bits = sb->s_blocksize_bits;
+ sector_t last_block;
+ int err, clu_offset, sec_offset;
+ unsigned int cluster;
+
+ *phys = 0;
+ *mapped_blocks = 0;
+
+ if ((p_fs->vol_type == FAT12) || (p_fs->vol_type == FAT16)) {
+ if (inode->i_ino == EXFAT_ROOT_INO) {
+ if (sector <
+ (p_fs->dentries_in_root >>
+ (p_bd->sector_size_bits-DENTRY_SIZE_BITS))) {
+ *phys = sector + p_fs->root_start_sector;
+ *mapped_blocks = 1;
+ }
+ return 0;
+ }
+ }
+
+ last_block = (i_size_read(inode) + (blocksize - 1)) >> blocksize_bits;
+ if (sector >= last_block) {
+ if (*create == 0)
+ return 0;
+ } else {
+ *create = 0;
+ }
+
+ /* cluster offset */
+ clu_offset = sector >> p_fs->sectors_per_clu_bits;
+
+ /* sector offset in cluster */
+ sec_offset = sector & (p_fs->sectors_per_clu - 1);
+
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+
+ err = ffsMapCluster(inode, clu_offset, &cluster);
+
+ if (err) {
+ if (err == FFS_FULL)
+ return -ENOSPC;
+ else
+ return -EIO;
+ } else if (cluster != CLUSTER_32(~0)) {
+ *phys = START_SECTOR(cluster) + sec_offset;
+ *mapped_blocks = p_fs->sectors_per_clu - sec_offset;
+ }
+
+ return 0;
+}
+
+static int exfat_get_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
+{
+ struct super_block *sb = inode->i_sb;
+ unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits;
+ int err;
+ unsigned long mapped_blocks;
+ sector_t phys;
+
+ __lock_super(sb);
+
+ err = exfat_bmap(inode, iblock, &phys, &mapped_blocks, &create);
+ if (err) {
+ __unlock_super(sb);
+ return err;
+ }
+
+ if (phys) {
+ max_blocks = min(mapped_blocks, max_blocks);
+ if (create) {
+ EXFAT_I(inode)->mmu_private += max_blocks <<
+ sb->s_blocksize_bits;
+ set_buffer_new(bh_result);
+ }
+ map_bh(bh_result, sb, phys);
+ }
+
+ bh_result->b_size = max_blocks << sb->s_blocksize_bits;
+ __unlock_super(sb);
+
+ return 0;
+}
+
+static int exfat_readpage(struct file *file, struct page *page)
+{
+ return mpage_readpage(page, exfat_get_block);
+}
+
+static int exfat_readpages(struct file *file, struct address_space *mapping,
+ struct list_head *pages, unsigned int nr_pages)
+{
+ return mpage_readpages(mapping, pages, nr_pages, exfat_get_block);
+}
+
+static int exfat_writepage(struct page *page, struct writeback_control *wbc)
+{
+ return block_write_full_page(page, exfat_get_block, wbc);
+}
+
+static int exfat_writepages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ return mpage_writepages(mapping, wbc, exfat_get_block);
+}
+
+static void exfat_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > i_size_read(inode)) {
+ truncate_pagecache(inode, i_size_read(inode));
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+ exfat_truncate(inode, i_size_read(inode));
+ }
+}
+
+static int exfat_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned int len, unsigned int flags,
+ struct page **pagep, void **fsdata)
+{
+ int ret;
+
+ *pagep = NULL;
+ ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+ exfat_get_block,
+ &EXFAT_I(mapping->host)->mmu_private);
+
+ if (ret < 0)
+ exfat_write_failed(mapping, pos+len);
+ return ret;
+}
+
+static int exfat_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned int len, unsigned int copied,
+ struct page *pagep, void *fsdata)
+{
+ struct inode *inode = mapping->host;
+ struct file_id_t *fid = &(EXFAT_I(inode)->fid);
+ int err;
+
+ err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata);
+
+ if (err < len)
+ exfat_write_failed(mapping, pos+len);
+
+ if (!(err < 0) && !(fid->attr & ATTR_ARCHIVE)) {
+ inode->i_mtime = inode->i_ctime = current_time(inode);
+ fid->attr |= ATTR_ARCHIVE;
+ mark_inode_dirty(inode);
+ }
+ return err;
+}
+
+static ssize_t exfat_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
+{
+ struct inode *inode = iocb->ki_filp->f_mapping->host;
+ struct address_space *mapping = iocb->ki_filp->f_mapping;
+ ssize_t ret;
+ int rw;
+
+ rw = iov_iter_rw(iter);
+
+ if (rw == WRITE) {
+ if (EXFAT_I(inode)->mmu_private < iov_iter_count(iter))
+ return 0;
+ }
+ ret = blockdev_direct_IO(iocb, inode, iter, exfat_get_block);
+
+ if ((ret < 0) && (rw & WRITE))
+ exfat_write_failed(mapping, iov_iter_count(iter));
+ return ret;
+}
+
+static sector_t _exfat_bmap(struct address_space *mapping, sector_t block)
+{
+ sector_t blocknr;
+
+ /* exfat_get_cluster() assumes the requested blocknr isn't truncated. */
+ down_read(&EXFAT_I(mapping->host)->truncate_lock);
+ blocknr = generic_block_bmap(mapping, block, exfat_get_block);
+ up_read(&EXFAT_I(mapping->host)->truncate_lock);
+
+ return blocknr;
+}
+
+static const struct address_space_operations exfat_aops = {
+ .readpage = exfat_readpage,
+ .readpages = exfat_readpages,
+ .writepage = exfat_writepage,
+ .writepages = exfat_writepages,
+ .write_begin = exfat_write_begin,
+ .write_end = exfat_write_end,
+ .direct_IO = exfat_direct_IO,
+ .bmap = _exfat_bmap
+};
+
+/*======================================================================*/
+/* Super Operations */
+/*======================================================================*/
+
+static struct inode *exfat_iget(struct super_block *sb, loff_t i_pos)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct exfat_inode_info *info;
+ struct hlist_head *head = sbi->inode_hashtable + exfat_hash(i_pos);
+ struct inode *inode = NULL;
+
+ spin_lock(&sbi->inode_hash_lock);
+ hlist_for_each_entry(info, head, i_hash_fat) {
+ BUG_ON(info->vfs_inode.i_sb != sb);
+
+ if (i_pos != info->i_pos)
+ continue;
+ inode = igrab(&info->vfs_inode);
+ if (inode)
+ break;
+ }
+ spin_unlock(&sbi->inode_hash_lock);
+ return inode;
+}
+
+/* doesn't deal with root inode */
+static int exfat_fill_inode(struct inode *inode, struct file_id_t *fid)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
+ struct fs_info_t *p_fs = &(sbi->fs_info);
+ struct dir_entry_t info;
+
+ memcpy(&(EXFAT_I(inode)->fid), fid, sizeof(struct file_id_t));
+
+ ffsReadStat(inode, &info);
+
+ EXFAT_I(inode)->i_pos = 0;
+ EXFAT_I(inode)->target = NULL;
+ inode->i_uid = sbi->options.fs_uid;
+ inode->i_gid = sbi->options.fs_gid;
+ INC_IVERSION(inode);
+ inode->i_generation = get_seconds();
+
+ if (info.Attr & ATTR_SUBDIR) { /* directory */
+ inode->i_generation &= ~1;
+ inode->i_mode = exfat_make_mode(sbi, info.Attr, 0777);
+ inode->i_op = &exfat_dir_inode_operations;
+ inode->i_fop = &exfat_dir_operations;
+
+ i_size_write(inode, info.Size);
+ EXFAT_I(inode)->mmu_private = i_size_read(inode);
+ set_nlink(inode, info.NumSubdirs);
+ } else if (info.Attr & ATTR_SYMLINK) { /* symbolic link */
+ inode->i_generation |= 1;
+ inode->i_mode = exfat_make_mode(sbi, info.Attr, 0777);
+ inode->i_op = &exfat_symlink_inode_operations;
+
+ i_size_write(inode, info.Size);
+ EXFAT_I(inode)->mmu_private = i_size_read(inode);
+ } else { /* regular file */
+ inode->i_generation |= 1;
+ inode->i_mode = exfat_make_mode(sbi, info.Attr, 0777);
+ inode->i_op = &exfat_file_inode_operations;
+ inode->i_fop = &exfat_file_operations;
+ inode->i_mapping->a_ops = &exfat_aops;
+ inode->i_mapping->nrpages = 0;
+
+ i_size_write(inode, info.Size);
+ EXFAT_I(inode)->mmu_private = i_size_read(inode);
+ }
+ exfat_save_attr(inode, info.Attr);
+
+ inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1))
+ & ~((loff_t)p_fs->cluster_size - 1)) >> 9;
+
+ exfat_time_fat2unix(sbi, &inode->i_mtime, &info.ModifyTimestamp);
+ exfat_time_fat2unix(sbi, &inode->i_ctime, &info.CreateTimestamp);
+ exfat_time_fat2unix(sbi, &inode->i_atime, &info.AccessTimestamp);
+
+ return 0;
+}
+
+static struct inode *exfat_build_inode(struct super_block *sb,
+ struct file_id_t *fid, loff_t i_pos)
+{
+ struct inode *inode;
+ int err;
+
+ inode = exfat_iget(sb, i_pos);
+ if (inode)
+ goto out;
+ inode = new_inode(sb);
+ if (!inode) {
+ inode = ERR_PTR(-ENOMEM);
+ goto out;
+ }
+ inode->i_ino = iunique(sb, EXFAT_ROOT_INO);
+ SET_IVERSION(inode, 1);
+ err = exfat_fill_inode(inode, fid);
+ if (err) {
+ iput(inode);
+ inode = ERR_PTR(err);
+ goto out;
+ }
+ exfat_attach(inode, i_pos);
+ insert_inode_hash(inode);
+out:
+ return inode;
+}
+
+static int exfat_sync_inode(struct inode *inode)
+{
+ return exfat_write_inode(inode, NULL);
+}
+
+static struct inode *exfat_alloc_inode(struct super_block *sb)
+{
+ struct exfat_inode_info *ei;
+
+ ei = kmem_cache_alloc(exfat_inode_cachep, GFP_NOFS);
+ if (!ei)
+ return NULL;
+
+ init_rwsem(&ei->truncate_lock);
+
+ return &ei->vfs_inode;
+}
+
+static void exfat_destroy_inode(struct inode *inode)
+{
+ if (EXFAT_I(inode)->target)
+ kfree(EXFAT_I(inode)->target);
+ EXFAT_I(inode)->target = NULL;
+
+ kmem_cache_free(exfat_inode_cachep, EXFAT_I(inode));
+}
+
+static int exfat_write_inode(struct inode *inode, struct writeback_control *wbc)
+{
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct dir_entry_t info;
+
+ if (inode->i_ino == EXFAT_ROOT_INO)
+ return 0;
+
+ info.Attr = exfat_make_attr(inode);
+ info.Size = i_size_read(inode);
+
+ exfat_time_unix2fat(sbi, &inode->i_mtime, &info.ModifyTimestamp);
+ exfat_time_unix2fat(sbi, &inode->i_ctime, &info.CreateTimestamp);
+ exfat_time_unix2fat(sbi, &inode->i_atime, &info.AccessTimestamp);
+
+ ffsWriteStat(inode, &info);
+
+ return 0;
+}
+
+static void exfat_evict_inode(struct inode *inode)
+{
+ truncate_inode_pages(&inode->i_data, 0);
+
+ if (!inode->i_nlink)
+ i_size_write(inode, 0);
+ invalidate_inode_buffers(inode);
+ clear_inode(inode);
+ exfat_detach(inode);
+
+ remove_inode_hash(inode);
+}
+
+static void exfat_free_super(struct exfat_sb_info *sbi)
+{
+ if (sbi->nls_disk)
+ unload_nls(sbi->nls_disk);
+ if (sbi->nls_io)
+ unload_nls(sbi->nls_io);
+ if (sbi->options.iocharset != exfat_default_iocharset)
+ kfree(sbi->options.iocharset);
+ /* mutex_init is in exfat_fill_super function. only for 3.7+ */
+ mutex_destroy(&sbi->s_lock);
+ kfree(sbi);
+}
+
+static void exfat_put_super(struct super_block *sb)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+
+ if (__is_sb_dirty(sb))
+ exfat_write_super(sb);
+
+ ffsUmountVol(sb);
+
+ sb->s_fs_info = NULL;
+ exfat_free_super(sbi);
+}
+
+static void exfat_write_super(struct super_block *sb)
+{
+ __lock_super(sb);
+
+ __set_sb_clean(sb);
+
+ if (!sb_rdonly(sb))
+ ffsSyncVol(sb, true);
+
+ __unlock_super(sb);
+}
+
+static int exfat_sync_fs(struct super_block *sb, int wait)
+{
+ int err = 0;
+
+ if (__is_sb_dirty(sb)) {
+ __lock_super(sb);
+ __set_sb_clean(sb);
+ err = ffsSyncVol(sb, true);
+ __unlock_super(sb);
+ }
+
+ return err;
+}
+
+static int exfat_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ struct super_block *sb = dentry->d_sb;
+ u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+ struct vol_info_t info;
+
+ if (p_fs->used_clusters == (u32) ~0) {
+ if (ffsGetVolInfo(sb, &info) == FFS_MEDIAERR)
+ return -EIO;
+
+ } else {
+ info.FatType = p_fs->vol_type;
+ info.ClusterSize = p_fs->cluster_size;
+ info.NumClusters = p_fs->num_clusters - 2;
+ info.UsedClusters = p_fs->used_clusters;
+ info.FreeClusters = info.NumClusters - info.UsedClusters;
+
+ if (p_fs->dev_ejected)
+ pr_info("[EXFAT] statfs on device that is ejected\n");
+ }
+
+ buf->f_type = sb->s_magic;
+ buf->f_bsize = info.ClusterSize;
+ buf->f_blocks = info.NumClusters;
+ buf->f_bfree = info.FreeClusters;
+ buf->f_bavail = info.FreeClusters;
+ buf->f_fsid.val[0] = (u32)id;
+ buf->f_fsid.val[1] = (u32)(id >> 32);
+ buf->f_namelen = 260;
+
+ return 0;
+}
+
+static int exfat_remount(struct super_block *sb, int *flags, char *data)
+{
+ *flags |= SB_NODIRATIME;
+ return 0;
+}
+
+static int exfat_show_options(struct seq_file *m, struct dentry *root)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(root->d_sb);
+ struct exfat_mount_options *opts = &sbi->options;
+
+ if (__kuid_val(opts->fs_uid))
+ seq_printf(m, ",uid=%u", __kuid_val(opts->fs_uid));
+ if (__kgid_val(opts->fs_gid))
+ seq_printf(m, ",gid=%u", __kgid_val(opts->fs_gid));
+ seq_printf(m, ",fmask=%04o", opts->fs_fmask);
+ seq_printf(m, ",dmask=%04o", opts->fs_dmask);
+ if (opts->allow_utime)
+ seq_printf(m, ",allow_utime=%04o", opts->allow_utime);
+ if (sbi->nls_disk)
+ seq_printf(m, ",codepage=%s", sbi->nls_disk->charset);
+ if (sbi->nls_io)
+ seq_printf(m, ",iocharset=%s", sbi->nls_io->charset);
+ seq_printf(m, ",namecase=%u", opts->casesensitive);
+ if (opts->errors == EXFAT_ERRORS_CONT)
+ seq_puts(m, ",errors=continue");
+ else if (opts->errors == EXFAT_ERRORS_PANIC)
+ seq_puts(m, ",errors=panic");
+ else
+ seq_puts(m, ",errors=remount-ro");
+#ifdef CONFIG_EXFAT_DISCARD
+ if (opts->discard)
+ seq_puts(m, ",discard");
+#endif
+ return 0;
+}
+
+static const struct super_operations exfat_sops = {
+ .alloc_inode = exfat_alloc_inode,
+ .destroy_inode = exfat_destroy_inode,
+ .write_inode = exfat_write_inode,
+ .evict_inode = exfat_evict_inode,
+ .put_super = exfat_put_super,
+ .sync_fs = exfat_sync_fs,
+ .statfs = exfat_statfs,
+ .remount_fs = exfat_remount,
+ .show_options = exfat_show_options,
+};
+
+/*======================================================================*/
+/* Export Operations */
+/*======================================================================*/
+
+static struct inode *exfat_nfs_get_inode(struct super_block *sb, u64 ino,
+ u32 generation)
+{
+ struct inode *inode = NULL;
+
+ if (ino < EXFAT_ROOT_INO)
+ return inode;
+ inode = ilookup(sb, ino);
+
+ if (inode && generation && (inode->i_generation != generation)) {
+ iput(inode);
+ inode = NULL;
+ }
+
+ return inode;
+}
+
+static struct dentry *exfat_fh_to_dentry(struct super_block *sb,
+ struct fid *fid, int fh_len,
+ int fh_type)
+{
+ return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
+ exfat_nfs_get_inode);
+}
+
+static struct dentry *exfat_fh_to_parent(struct super_block *sb,
+ struct fid *fid, int fh_len,
+ int fh_type)
+{
+ return generic_fh_to_parent(sb, fid, fh_len, fh_type,
+ exfat_nfs_get_inode);
+}
+
+static const struct export_operations exfat_export_ops = {
+ .fh_to_dentry = exfat_fh_to_dentry,
+ .fh_to_parent = exfat_fh_to_parent,
+};
+
+/*======================================================================*/
+/* Super Block Read Operations */
+/*======================================================================*/
+
+enum {
+ Opt_uid,
+ Opt_gid,
+ Opt_umask,
+ Opt_dmask,
+ Opt_fmask,
+ Opt_allow_utime,
+ Opt_codepage,
+ Opt_charset,
+ Opt_namecase,
+ Opt_debug,
+ Opt_err_cont,
+ Opt_err_panic,
+ Opt_err_ro,
+ Opt_utf8_hack,
+ Opt_err,
+#ifdef CONFIG_EXFAT_DISCARD
+ Opt_discard,
+#endif /* EXFAT_CONFIG_DISCARD */
+};
+
+static const match_table_t exfat_tokens = {
+ {Opt_uid, "uid=%u"},
+ {Opt_gid, "gid=%u"},
+ {Opt_umask, "umask=%o"},
+ {Opt_dmask, "dmask=%o"},
+ {Opt_fmask, "fmask=%o"},
+ {Opt_allow_utime, "allow_utime=%o"},
+ {Opt_codepage, "codepage=%u"},
+ {Opt_charset, "iocharset=%s"},
+ {Opt_namecase, "namecase=%u"},
+ {Opt_debug, "debug"},
+ {Opt_err_cont, "errors=continue"},
+ {Opt_err_panic, "errors=panic"},
+ {Opt_err_ro, "errors=remount-ro"},
+ {Opt_utf8_hack, "utf8"},
+#ifdef CONFIG_EXFAT_DISCARD
+ {Opt_discard, "discard"},
+#endif /* CONFIG_EXFAT_DISCARD */
+ {Opt_err, NULL}
+};
+
+static int parse_options(char *options, int silent, int *debug,
+ struct exfat_mount_options *opts)
+{
+ char *p;
+ substring_t args[MAX_OPT_ARGS];
+ int option;
+ char *iocharset;
+
+ opts->fs_uid = current_uid();
+ opts->fs_gid = current_gid();
+ opts->fs_fmask = opts->fs_dmask = current->fs->umask;
+ opts->allow_utime = (unsigned short) -1;
+ opts->codepage = exfat_default_codepage;
+ opts->iocharset = exfat_default_iocharset;
+ opts->casesensitive = 0;
+ opts->errors = EXFAT_ERRORS_RO;
+#ifdef CONFIG_EXFAT_DISCARD
+ opts->discard = 0;
+#endif
+ *debug = 0;
+
+ if (!options)
+ goto out;
+
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token;
+
+ if (!*p)
+ continue;
+
+ token = match_token(p, exfat_tokens, args);
+ switch (token) {
+ case Opt_uid:
+ if (match_int(&args[0], &option))
+ return 0;
+ opts->fs_uid = KUIDT_INIT(option);
+ break;
+ case Opt_gid:
+ if (match_int(&args[0], &option))
+ return 0;
+ opts->fs_gid = KGIDT_INIT(option);
+ break;
+ case Opt_umask:
+ case Opt_dmask:
+ case Opt_fmask:
+ if (match_octal(&args[0], &option))
+ return 0;
+ if (token != Opt_dmask)
+ opts->fs_fmask = option;
+ if (token != Opt_fmask)
+ opts->fs_dmask = option;
+ break;
+ case Opt_allow_utime:
+ if (match_octal(&args[0], &option))
+ return 0;
+ opts->allow_utime = option & 0022;
+ break;
+ case Opt_codepage:
+ if (match_int(&args[0], &option))
+ return 0;
+ opts->codepage = option;
+ break;
+ case Opt_charset:
+ if (opts->iocharset != exfat_default_iocharset)
+ kfree(opts->iocharset);
+ iocharset = match_strdup(&args[0]);
+ if (!iocharset)
+ return -ENOMEM;
+ opts->iocharset = iocharset;
+ break;
+ case Opt_namecase:
+ if (match_int(&args[0], &option))
+ return 0;
+ opts->casesensitive = option;
+ break;
+ case Opt_err_cont:
+ opts->errors = EXFAT_ERRORS_CONT;
+ break;
+ case Opt_err_panic:
+ opts->errors = EXFAT_ERRORS_PANIC;
+ break;
+ case Opt_err_ro:
+ opts->errors = EXFAT_ERRORS_RO;
+ break;
+ case Opt_debug:
+ *debug = 1;
+ break;
+#ifdef CONFIG_EXFAT_DISCARD
+ case Opt_discard:
+ opts->discard = 1;
+ break;
+#endif /* CONFIG_EXFAT_DISCARD */
+ case Opt_utf8_hack:
+ break;
+ default:
+ if (!silent)
+ pr_err("[EXFAT] Unrecognized mount option %s or missing value\n",
+ p);
+ return -EINVAL;
+ }
+ }
+
+out:
+ if (opts->allow_utime == (unsigned short) -1)
+ opts->allow_utime = ~opts->fs_dmask & 0022;
+
+ return 0;
+}
+
+static void exfat_hash_init(struct super_block *sb)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ int i;
+
+ spin_lock_init(&sbi->inode_hash_lock);
+ for (i = 0; i < EXFAT_HASH_SIZE; i++)
+ INIT_HLIST_HEAD(&sbi->inode_hashtable[i]);
+}
+
+static int exfat_read_root(struct inode *inode)
+{
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct fs_info_t *p_fs = &(sbi->fs_info);
+ struct dir_entry_t info;
+
+ EXFAT_I(inode)->fid.dir.dir = p_fs->root_dir;
+ EXFAT_I(inode)->fid.dir.flags = 0x01;
+ EXFAT_I(inode)->fid.entry = -1;
+ EXFAT_I(inode)->fid.start_clu = p_fs->root_dir;
+ EXFAT_I(inode)->fid.flags = 0x01;
+ EXFAT_I(inode)->fid.type = TYPE_DIR;
+ EXFAT_I(inode)->fid.rwoffset = 0;
+ EXFAT_I(inode)->fid.hint_last_off = -1;
+
+ EXFAT_I(inode)->target = NULL;
+
+ ffsReadStat(inode, &info);
+
+ inode->i_uid = sbi->options.fs_uid;
+ inode->i_gid = sbi->options.fs_gid;
+ INC_IVERSION(inode);
+ inode->i_generation = 0;
+ inode->i_mode = exfat_make_mode(sbi, ATTR_SUBDIR, 0777);
+ inode->i_op = &exfat_dir_inode_operations;
+ inode->i_fop = &exfat_dir_operations;
+
+ i_size_write(inode, info.Size);
+ inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1))
+ & ~((loff_t)p_fs->cluster_size - 1)) >> 9;
+ EXFAT_I(inode)->i_pos = ((loff_t) p_fs->root_dir << 32) | 0xffffffff;
+ EXFAT_I(inode)->mmu_private = i_size_read(inode);
+
+ exfat_save_attr(inode, ATTR_SUBDIR);
+ inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
+ set_nlink(inode, info.NumSubdirs + 2);
+
+ return 0;
+}
+
+static void setup_dops(struct super_block *sb)
+{
+ if (EXFAT_SB(sb)->options.casesensitive == 0)
+ sb->s_d_op = &exfat_ci_dentry_ops;
+ else
+ sb->s_d_op = &exfat_dentry_ops;
+}
+
+static int exfat_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct inode *root_inode = NULL;
+ struct exfat_sb_info *sbi;
+ int debug, ret;
+ long error;
+ char buf[50];
+
+ /*
+ * GFP_KERNEL is ok here, because while we do hold the
+ * supeblock lock, memory pressure can't call back into
+ * the filesystem, since we're only just about to mount
+ * it and have no inodes etc active!
+ */
+ sbi = kzalloc(sizeof(struct exfat_sb_info), GFP_KERNEL);
+ if (!sbi)
+ return -ENOMEM;
+ mutex_init(&sbi->s_lock);
+ sb->s_fs_info = sbi;
+ sb->s_flags |= SB_NODIRATIME;
+ sb->s_magic = EXFAT_SUPER_MAGIC;
+ sb->s_op = &exfat_sops;
+ sb->s_export_op = &exfat_export_ops;
+
+ error = parse_options(data, silent, &debug, &sbi->options);
+ if (error)
+ goto out_fail;
+
+ setup_dops(sb);
+
+ error = -EIO;
+ sb_min_blocksize(sb, 512);
+ sb->s_maxbytes = 0x7fffffffffffffffLL; /* maximum file size */
+
+ ret = ffsMountVol(sb);
+ if (ret) {
+ if (!silent)
+ pr_err("[EXFAT] ffsMountVol failed\n");
+
+ goto out_fail;
+ }
+
+ /* set up enough so that it can read an inode */
+ exfat_hash_init(sb);
+
+ /*
+ * The low byte of FAT's first entry must have same value with
+ * media-field. But in real world, too many devices is
+ * writing wrong value. So, removed that validity check.
+ *
+ * if (FAT_FIRST_ENT(sb, media) != first)
+ */
+
+ /* codepage is not meaningful in exfat */
+ if (sbi->fs_info.vol_type != EXFAT) {
+ error = -EINVAL;
+ sprintf(buf, "cp%d", sbi->options.codepage);
+ sbi->nls_disk = load_nls(buf);
+ if (!sbi->nls_disk) {
+ pr_err("[EXFAT] Codepage %s not found\n", buf);
+ goto out_fail2;
+ }
+ }
+
+ sbi->nls_io = load_nls(sbi->options.iocharset);
+
+ error = -ENOMEM;
+ root_inode = new_inode(sb);
+ if (!root_inode)
+ goto out_fail2;
+ root_inode->i_ino = EXFAT_ROOT_INO;
+ SET_IVERSION(root_inode, 1);
+
+ error = exfat_read_root(root_inode);
+ if (error < 0)
+ goto out_fail2;
+ error = -ENOMEM;
+ exfat_attach(root_inode, EXFAT_I(root_inode)->i_pos);
+ insert_inode_hash(root_inode);
+ sb->s_root = d_make_root(root_inode);
+ if (!sb->s_root) {
+ pr_err("[EXFAT] Getting the root inode failed\n");
+ goto out_fail2;
+ }
+
+ return 0;
+
+out_fail2:
+ ffsUmountVol(sb);
+out_fail:
+ if (root_inode)
+ iput(root_inode);
+ sb->s_fs_info = NULL;
+ exfat_free_super(sbi);
+ return error;
+}
+
+static struct dentry *exfat_fs_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data)
+{
+ return mount_bdev(fs_type, flags, dev_name, data, exfat_fill_super);
+}
+
+static void init_once(void *foo)
+{
+ struct exfat_inode_info *ei = (struct exfat_inode_info *)foo;
+
+ INIT_HLIST_NODE(&ei->i_hash_fat);
+ inode_init_once(&ei->vfs_inode);
+}
+
+static int __init exfat_init_inodecache(void)
+{
+ exfat_inode_cachep = kmem_cache_create("exfat_inode_cache",
+ sizeof(struct exfat_inode_info),
+ 0,
+ (SLAB_RECLAIM_ACCOUNT |
+ SLAB_MEM_SPREAD),
+ init_once);
+ if (exfat_inode_cachep == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static void __exit exfat_destroy_inodecache(void)
+{
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
+ kmem_cache_destroy(exfat_inode_cachep);
+}
+
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+static void exfat_debug_kill_sb(struct super_block *sb)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct block_device *bdev = sb->s_bdev;
+ struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
+
+ long flags;
+
+ if (sbi) {
+ flags = sbi->debug_flags;
+
+ if (flags & EXFAT_DEBUGFLAGS_INVALID_UMOUNT) {
+ /*
+ * invalidate_bdev drops all device cache include
+ * dirty. We use this to simulate device removal.
+ */
+ down(&p_fs->v_sem);
+ FAT_release_all(sb);
+ buf_release_all(sb);
+ up(&p_fs->v_sem);
+
+ invalidate_bdev(bdev);
+ }
+ }
+
+ kill_block_super(sb);
+}
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+
+static struct file_system_type exfat_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "exfat",
+ .mount = exfat_fs_mount,
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ .kill_sb = exfat_debug_kill_sb,
+#else
+ .kill_sb = kill_block_super,
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+ .fs_flags = FS_REQUIRES_DEV,
+};
+
+static int __init init_exfat(void)
+{
+ int err;
+
+ BUILD_BUG_ON(sizeof(struct dentry_t) != DENTRY_SIZE);
+ BUILD_BUG_ON(sizeof(struct dos_dentry_t) != DENTRY_SIZE);
+ BUILD_BUG_ON(sizeof(struct ext_dentry_t) != DENTRY_SIZE);
+ BUILD_BUG_ON(sizeof(struct file_dentry_t) != DENTRY_SIZE);
+ BUILD_BUG_ON(sizeof(struct strm_dentry_t) != DENTRY_SIZE);
+ BUILD_BUG_ON(sizeof(struct name_dentry_t) != DENTRY_SIZE);
+ BUILD_BUG_ON(sizeof(struct bmap_dentry_t) != DENTRY_SIZE);
+ BUILD_BUG_ON(sizeof(struct case_dentry_t) != DENTRY_SIZE);
+ BUILD_BUG_ON(sizeof(struct volm_dentry_t) != DENTRY_SIZE);
+
+ pr_info("exFAT: Version %s\n", EXFAT_VERSION);
+
+ err = exfat_init_inodecache();
+ if (err)
+ return err;
+
+ err = register_filesystem(&exfat_fs_type);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static void __exit exit_exfat(void)
+{
+ exfat_destroy_inodecache();
+ unregister_filesystem(&exfat_fs_type);
+}
+
+module_init(init_exfat);
+module_exit(exit_exfat);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("exFAT Filesystem Driver");
+MODULE_ALIAS_FS("exfat");
diff --git a/drivers/staging/exfat/exfat_upcase.c b/drivers/staging/exfat/exfat_upcase.c
new file mode 100644
index 000000000000..366082fb3dab
--- /dev/null
+++ b/drivers/staging/exfat/exfat_upcase.c
@@ -0,0 +1,740 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ */
+
+#include <linux/types.h>
+#include "exfat.h"
+
+const u8 uni_upcase[NUM_UPCASE << 1] = {
+ 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x03, 0x00,
+ 0x04, 0x00, 0x05, 0x00, 0x06, 0x00, 0x07, 0x00,
+ 0x08, 0x00, 0x09, 0x00, 0x0A, 0x00, 0x0B, 0x00,
+ 0x0C, 0x00, 0x0D, 0x00, 0x0E, 0x00, 0x0F, 0x00,
+ 0x10, 0x00, 0x11, 0x00, 0x12, 0x00, 0x13, 0x00,
+ 0x14, 0x00, 0x15, 0x00, 0x16, 0x00, 0x17, 0x00,
+ 0x18, 0x00, 0x19, 0x00, 0x1A, 0x00, 0x1B, 0x00,
+ 0x1C, 0x00, 0x1D, 0x00, 0x1E, 0x00, 0x1F, 0x00,
+ 0x20, 0x00, 0x21, 0x00, 0x22, 0x00, 0x23, 0x00,
+ 0x24, 0x00, 0x25, 0x00, 0x26, 0x00, 0x27, 0x00,
+ 0x28, 0x00, 0x29, 0x00, 0x2A, 0x00, 0x2B, 0x00,
+ 0x2C, 0x00, 0x2D, 0x00, 0x2E, 0x00, 0x2F, 0x00,
+ 0x30, 0x00, 0x31, 0x00, 0x32, 0x00, 0x33, 0x00,
+ 0x34, 0x00, 0x35, 0x00, 0x36, 0x00, 0x37, 0x00,
+ 0x38, 0x00, 0x39, 0x00, 0x3A, 0x00, 0x3B, 0x00,
+ 0x3C, 0x00, 0x3D, 0x00, 0x3E, 0x00, 0x3F, 0x00,
+ 0x40, 0x00, 0x41, 0x00, 0x42, 0x00, 0x43, 0x00,
+ 0x44, 0x00, 0x45, 0x00, 0x46, 0x00, 0x47, 0x00,
+ 0x48, 0x00, 0x49, 0x00, 0x4A, 0x00, 0x4B, 0x00,
+ 0x4C, 0x00, 0x4D, 0x00, 0x4E, 0x00, 0x4F, 0x00,
+ 0x50, 0x00, 0x51, 0x00, 0x52, 0x00, 0x53, 0x00,
+ 0x54, 0x00, 0x55, 0x00, 0x56, 0x00, 0x57, 0x00,
+ 0x58, 0x00, 0x59, 0x00, 0x5A, 0x00, 0x5B, 0x00,
+ 0x5C, 0x00, 0x5D, 0x00, 0x5E, 0x00, 0x5F, 0x00,
+ 0x60, 0x00, 0x41, 0x00, 0x42, 0x00, 0x43, 0x00,
+ 0x44, 0x00, 0x45, 0x00, 0x46, 0x00, 0x47, 0x00,
+ 0x48, 0x00, 0x49, 0x00, 0x4A, 0x00, 0x4B, 0x00,
+ 0x4C, 0x00, 0x4D, 0x00, 0x4E, 0x00, 0x4F, 0x00,
+ 0x50, 0x00, 0x51, 0x00, 0x52, 0x00, 0x53, 0x00,
+ 0x54, 0x00, 0x55, 0x00, 0x56, 0x00, 0x57, 0x00,
+ 0x58, 0x00, 0x59, 0x00, 0x5A, 0x00, 0x7B, 0x00,
+ 0x7C, 0x00, 0x7D, 0x00, 0x7E, 0x00, 0x7F, 0x00,
+ 0x80, 0x00, 0x81, 0x00, 0x82, 0x00, 0x83, 0x00,
+ 0x84, 0x00, 0x85, 0x00, 0x86, 0x00, 0x87, 0x00,
+ 0x88, 0x00, 0x89, 0x00, 0x8A, 0x00, 0x8B, 0x00,
+ 0x8C, 0x00, 0x8D, 0x00, 0x8E, 0x00, 0x8F, 0x00,
+ 0x90, 0x00, 0x91, 0x00, 0x92, 0x00, 0x93, 0x00,
+ 0x94, 0x00, 0x95, 0x00, 0x96, 0x00, 0x97, 0x00,
+ 0x98, 0x00, 0x99, 0x00, 0x9A, 0x00, 0x9B, 0x00,
+ 0x9C, 0x00, 0x9D, 0x00, 0x9E, 0x00, 0x9F, 0x00,
+ 0xA0, 0x00, 0xA1, 0x00, 0xA2, 0x00, 0xA3, 0x00,
+ 0xA4, 0x00, 0xA5, 0x00, 0xA6, 0x00, 0xA7, 0x00,
+ 0xA8, 0x00, 0xA9, 0x00, 0xAA, 0x00, 0xAB, 0x00,
+ 0xAC, 0x00, 0xAD, 0x00, 0xAE, 0x00, 0xAF, 0x00,
+ 0xB0, 0x00, 0xB1, 0x00, 0xB2, 0x00, 0xB3, 0x00,
+ 0xB4, 0x00, 0xB5, 0x00, 0xB6, 0x00, 0xB7, 0x00,
+ 0xB8, 0x00, 0xB9, 0x00, 0xBA, 0x00, 0xBB, 0x00,
+ 0xBC, 0x00, 0xBD, 0x00, 0xBE, 0x00, 0xBF, 0x00,
+ 0xC0, 0x00, 0xC1, 0x00, 0xC2, 0x00, 0xC3, 0x00,
+ 0xC4, 0x00, 0xC5, 0x00, 0xC6, 0x00, 0xC7, 0x00,
+ 0xC8, 0x00, 0xC9, 0x00, 0xCA, 0x00, 0xCB, 0x00,
+ 0xCC, 0x00, 0xCD, 0x00, 0xCE, 0x00, 0xCF, 0x00,
+ 0xD0, 0x00, 0xD1, 0x00, 0xD2, 0x00, 0xD3, 0x00,
+ 0xD4, 0x00, 0xD5, 0x00, 0xD6, 0x00, 0xD7, 0x00,
+ 0xD8, 0x00, 0xD9, 0x00, 0xDA, 0x00, 0xDB, 0x00,
+ 0xDC, 0x00, 0xDD, 0x00, 0xDE, 0x00, 0xDF, 0x00,
+ 0xC0, 0x00, 0xC1, 0x00, 0xC2, 0x00, 0xC3, 0x00,
+ 0xC4, 0x00, 0xC5, 0x00, 0xC6, 0x00, 0xC7, 0x00,
+ 0xC8, 0x00, 0xC9, 0x00, 0xCA, 0x00, 0xCB, 0x00,
+ 0xCC, 0x00, 0xCD, 0x00, 0xCE, 0x00, 0xCF, 0x00,
+ 0xD0, 0x00, 0xD1, 0x00, 0xD2, 0x00, 0xD3, 0x00,
+ 0xD4, 0x00, 0xD5, 0x00, 0xD6, 0x00, 0xF7, 0x00,
+ 0xD8, 0x00, 0xD9, 0x00, 0xDA, 0x00, 0xDB, 0x00,
+ 0xDC, 0x00, 0xDD, 0x00, 0xDE, 0x00, 0x78, 0x01,
+ 0x00, 0x01, 0x00, 0x01, 0x02, 0x01, 0x02, 0x01,
+ 0x04, 0x01, 0x04, 0x01, 0x06, 0x01, 0x06, 0x01,
+ 0x08, 0x01, 0x08, 0x01, 0x0A, 0x01, 0x0A, 0x01,
+ 0x0C, 0x01, 0x0C, 0x01, 0x0E, 0x01, 0x0E, 0x01,
+ 0x10, 0x01, 0x10, 0x01, 0x12, 0x01, 0x12, 0x01,
+ 0x14, 0x01, 0x14, 0x01, 0x16, 0x01, 0x16, 0x01,
+ 0x18, 0x01, 0x18, 0x01, 0x1A, 0x01, 0x1A, 0x01,
+ 0x1C, 0x01, 0x1C, 0x01, 0x1E, 0x01, 0x1E, 0x01,
+ 0x20, 0x01, 0x20, 0x01, 0x22, 0x01, 0x22, 0x01,
+ 0x24, 0x01, 0x24, 0x01, 0x26, 0x01, 0x26, 0x01,
+ 0x28, 0x01, 0x28, 0x01, 0x2A, 0x01, 0x2A, 0x01,
+ 0x2C, 0x01, 0x2C, 0x01, 0x2E, 0x01, 0x2E, 0x01,
+ 0x30, 0x01, 0x31, 0x01, 0x32, 0x01, 0x32, 0x01,
+ 0x34, 0x01, 0x34, 0x01, 0x36, 0x01, 0x36, 0x01,
+ 0x38, 0x01, 0x39, 0x01, 0x39, 0x01, 0x3B, 0x01,
+ 0x3B, 0x01, 0x3D, 0x01, 0x3D, 0x01, 0x3F, 0x01,
+ 0x3F, 0x01, 0x41, 0x01, 0x41, 0x01, 0x43, 0x01,
+ 0x43, 0x01, 0x45, 0x01, 0x45, 0x01, 0x47, 0x01,
+ 0x47, 0x01, 0x49, 0x01, 0x4A, 0x01, 0x4A, 0x01,
+ 0x4C, 0x01, 0x4C, 0x01, 0x4E, 0x01, 0x4E, 0x01,
+ 0x50, 0x01, 0x50, 0x01, 0x52, 0x01, 0x52, 0x01,
+ 0x54, 0x01, 0x54, 0x01, 0x56, 0x01, 0x56, 0x01,
+ 0x58, 0x01, 0x58, 0x01, 0x5A, 0x01, 0x5A, 0x01,
+ 0x5C, 0x01, 0x5C, 0x01, 0x5E, 0x01, 0x5E, 0x01,
+ 0x60, 0x01, 0x60, 0x01, 0x62, 0x01, 0x62, 0x01,
+ 0x64, 0x01, 0x64, 0x01, 0x66, 0x01, 0x66, 0x01,
+ 0x68, 0x01, 0x68, 0x01, 0x6A, 0x01, 0x6A, 0x01,
+ 0x6C, 0x01, 0x6C, 0x01, 0x6E, 0x01, 0x6E, 0x01,
+ 0x70, 0x01, 0x70, 0x01, 0x72, 0x01, 0x72, 0x01,
+ 0x74, 0x01, 0x74, 0x01, 0x76, 0x01, 0x76, 0x01,
+ 0x78, 0x01, 0x79, 0x01, 0x79, 0x01, 0x7B, 0x01,
+ 0x7B, 0x01, 0x7D, 0x01, 0x7D, 0x01, 0x7F, 0x01,
+ 0x43, 0x02, 0x81, 0x01, 0x82, 0x01, 0x82, 0x01,
+ 0x84, 0x01, 0x84, 0x01, 0x86, 0x01, 0x87, 0x01,
+ 0x87, 0x01, 0x89, 0x01, 0x8A, 0x01, 0x8B, 0x01,
+ 0x8B, 0x01, 0x8D, 0x01, 0x8E, 0x01, 0x8F, 0x01,
+ 0x90, 0x01, 0x91, 0x01, 0x91, 0x01, 0x93, 0x01,
+ 0x94, 0x01, 0xF6, 0x01, 0x96, 0x01, 0x97, 0x01,
+ 0x98, 0x01, 0x98, 0x01, 0x3D, 0x02, 0x9B, 0x01,
+ 0x9C, 0x01, 0x9D, 0x01, 0x20, 0x02, 0x9F, 0x01,
+ 0xA0, 0x01, 0xA0, 0x01, 0xA2, 0x01, 0xA2, 0x01,
+ 0xA4, 0x01, 0xA4, 0x01, 0xA6, 0x01, 0xA7, 0x01,
+ 0xA7, 0x01, 0xA9, 0x01, 0xAA, 0x01, 0xAB, 0x01,
+ 0xAC, 0x01, 0xAC, 0x01, 0xAE, 0x01, 0xAF, 0x01,
+ 0xAF, 0x01, 0xB1, 0x01, 0xB2, 0x01, 0xB3, 0x01,
+ 0xB3, 0x01, 0xB5, 0x01, 0xB5, 0x01, 0xB7, 0x01,
+ 0xB8, 0x01, 0xB8, 0x01, 0xBA, 0x01, 0xBB, 0x01,
+ 0xBC, 0x01, 0xBC, 0x01, 0xBE, 0x01, 0xF7, 0x01,
+ 0xC0, 0x01, 0xC1, 0x01, 0xC2, 0x01, 0xC3, 0x01,
+ 0xC4, 0x01, 0xC5, 0x01, 0xC4, 0x01, 0xC7, 0x01,
+ 0xC8, 0x01, 0xC7, 0x01, 0xCA, 0x01, 0xCB, 0x01,
+ 0xCA, 0x01, 0xCD, 0x01, 0xCD, 0x01, 0xCF, 0x01,
+ 0xCF, 0x01, 0xD1, 0x01, 0xD1, 0x01, 0xD3, 0x01,
+ 0xD3, 0x01, 0xD5, 0x01, 0xD5, 0x01, 0xD7, 0x01,
+ 0xD7, 0x01, 0xD9, 0x01, 0xD9, 0x01, 0xDB, 0x01,
+ 0xDB, 0x01, 0x8E, 0x01, 0xDE, 0x01, 0xDE, 0x01,
+ 0xE0, 0x01, 0xE0, 0x01, 0xE2, 0x01, 0xE2, 0x01,
+ 0xE4, 0x01, 0xE4, 0x01, 0xE6, 0x01, 0xE6, 0x01,
+ 0xE8, 0x01, 0xE8, 0x01, 0xEA, 0x01, 0xEA, 0x01,
+ 0xEC, 0x01, 0xEC, 0x01, 0xEE, 0x01, 0xEE, 0x01,
+ 0xF0, 0x01, 0xF1, 0x01, 0xF2, 0x01, 0xF1, 0x01,
+ 0xF4, 0x01, 0xF4, 0x01, 0xF6, 0x01, 0xF7, 0x01,
+ 0xF8, 0x01, 0xF8, 0x01, 0xFA, 0x01, 0xFA, 0x01,
+ 0xFC, 0x01, 0xFC, 0x01, 0xFE, 0x01, 0xFE, 0x01,
+ 0x00, 0x02, 0x00, 0x02, 0x02, 0x02, 0x02, 0x02,
+ 0x04, 0x02, 0x04, 0x02, 0x06, 0x02, 0x06, 0x02,
+ 0x08, 0x02, 0x08, 0x02, 0x0A, 0x02, 0x0A, 0x02,
+ 0x0C, 0x02, 0x0C, 0x02, 0x0E, 0x02, 0x0E, 0x02,
+ 0x10, 0x02, 0x10, 0x02, 0x12, 0x02, 0x12, 0x02,
+ 0x14, 0x02, 0x14, 0x02, 0x16, 0x02, 0x16, 0x02,
+ 0x18, 0x02, 0x18, 0x02, 0x1A, 0x02, 0x1A, 0x02,
+ 0x1C, 0x02, 0x1C, 0x02, 0x1E, 0x02, 0x1E, 0x02,
+ 0x20, 0x02, 0x21, 0x02, 0x22, 0x02, 0x22, 0x02,
+ 0x24, 0x02, 0x24, 0x02, 0x26, 0x02, 0x26, 0x02,
+ 0x28, 0x02, 0x28, 0x02, 0x2A, 0x02, 0x2A, 0x02,
+ 0x2C, 0x02, 0x2C, 0x02, 0x2E, 0x02, 0x2E, 0x02,
+ 0x30, 0x02, 0x30, 0x02, 0x32, 0x02, 0x32, 0x02,
+ 0x34, 0x02, 0x35, 0x02, 0x36, 0x02, 0x37, 0x02,
+ 0x38, 0x02, 0x39, 0x02, 0x65, 0x2C, 0x3B, 0x02,
+ 0x3B, 0x02, 0x3D, 0x02, 0x66, 0x2C, 0x3F, 0x02,
+ 0x40, 0x02, 0x41, 0x02, 0x41, 0x02, 0x43, 0x02,
+ 0x44, 0x02, 0x45, 0x02, 0x46, 0x02, 0x46, 0x02,
+ 0x48, 0x02, 0x48, 0x02, 0x4A, 0x02, 0x4A, 0x02,
+ 0x4C, 0x02, 0x4C, 0x02, 0x4E, 0x02, 0x4E, 0x02,
+ 0x50, 0x02, 0x51, 0x02, 0x52, 0x02, 0x81, 0x01,
+ 0x86, 0x01, 0x55, 0x02, 0x89, 0x01, 0x8A, 0x01,
+ 0x58, 0x02, 0x8F, 0x01, 0x5A, 0x02, 0x90, 0x01,
+ 0x5C, 0x02, 0x5D, 0x02, 0x5E, 0x02, 0x5F, 0x02,
+ 0x93, 0x01, 0x61, 0x02, 0x62, 0x02, 0x94, 0x01,
+ 0x64, 0x02, 0x65, 0x02, 0x66, 0x02, 0x67, 0x02,
+ 0x97, 0x01, 0x96, 0x01, 0x6A, 0x02, 0x62, 0x2C,
+ 0x6C, 0x02, 0x6D, 0x02, 0x6E, 0x02, 0x9C, 0x01,
+ 0x70, 0x02, 0x71, 0x02, 0x9D, 0x01, 0x73, 0x02,
+ 0x74, 0x02, 0x9F, 0x01, 0x76, 0x02, 0x77, 0x02,
+ 0x78, 0x02, 0x79, 0x02, 0x7A, 0x02, 0x7B, 0x02,
+ 0x7C, 0x02, 0x64, 0x2C, 0x7E, 0x02, 0x7F, 0x02,
+ 0xA6, 0x01, 0x81, 0x02, 0x82, 0x02, 0xA9, 0x01,
+ 0x84, 0x02, 0x85, 0x02, 0x86, 0x02, 0x87, 0x02,
+ 0xAE, 0x01, 0x44, 0x02, 0xB1, 0x01, 0xB2, 0x01,
+ 0x45, 0x02, 0x8D, 0x02, 0x8E, 0x02, 0x8F, 0x02,
+ 0x90, 0x02, 0x91, 0x02, 0xB7, 0x01, 0x93, 0x02,
+ 0x94, 0x02, 0x95, 0x02, 0x96, 0x02, 0x97, 0x02,
+ 0x98, 0x02, 0x99, 0x02, 0x9A, 0x02, 0x9B, 0x02,
+ 0x9C, 0x02, 0x9D, 0x02, 0x9E, 0x02, 0x9F, 0x02,
+ 0xA0, 0x02, 0xA1, 0x02, 0xA2, 0x02, 0xA3, 0x02,
+ 0xA4, 0x02, 0xA5, 0x02, 0xA6, 0x02, 0xA7, 0x02,
+ 0xA8, 0x02, 0xA9, 0x02, 0xAA, 0x02, 0xAB, 0x02,
+ 0xAC, 0x02, 0xAD, 0x02, 0xAE, 0x02, 0xAF, 0x02,
+ 0xB0, 0x02, 0xB1, 0x02, 0xB2, 0x02, 0xB3, 0x02,
+ 0xB4, 0x02, 0xB5, 0x02, 0xB6, 0x02, 0xB7, 0x02,
+ 0xB8, 0x02, 0xB9, 0x02, 0xBA, 0x02, 0xBB, 0x02,
+ 0xBC, 0x02, 0xBD, 0x02, 0xBE, 0x02, 0xBF, 0x02,
+ 0xC0, 0x02, 0xC1, 0x02, 0xC2, 0x02, 0xC3, 0x02,
+ 0xC4, 0x02, 0xC5, 0x02, 0xC6, 0x02, 0xC7, 0x02,
+ 0xC8, 0x02, 0xC9, 0x02, 0xCA, 0x02, 0xCB, 0x02,
+ 0xCC, 0x02, 0xCD, 0x02, 0xCE, 0x02, 0xCF, 0x02,
+ 0xD0, 0x02, 0xD1, 0x02, 0xD2, 0x02, 0xD3, 0x02,
+ 0xD4, 0x02, 0xD5, 0x02, 0xD6, 0x02, 0xD7, 0x02,
+ 0xD8, 0x02, 0xD9, 0x02, 0xDA, 0x02, 0xDB, 0x02,
+ 0xDC, 0x02, 0xDD, 0x02, 0xDE, 0x02, 0xDF, 0x02,
+ 0xE0, 0x02, 0xE1, 0x02, 0xE2, 0x02, 0xE3, 0x02,
+ 0xE4, 0x02, 0xE5, 0x02, 0xE6, 0x02, 0xE7, 0x02,
+ 0xE8, 0x02, 0xE9, 0x02, 0xEA, 0x02, 0xEB, 0x02,
+ 0xEC, 0x02, 0xED, 0x02, 0xEE, 0x02, 0xEF, 0x02,
+ 0xF0, 0x02, 0xF1, 0x02, 0xF2, 0x02, 0xF3, 0x02,
+ 0xF4, 0x02, 0xF5, 0x02, 0xF6, 0x02, 0xF7, 0x02,
+ 0xF8, 0x02, 0xF9, 0x02, 0xFA, 0x02, 0xFB, 0x02,
+ 0xFC, 0x02, 0xFD, 0x02, 0xFE, 0x02, 0xFF, 0x02,
+ 0x00, 0x03, 0x01, 0x03, 0x02, 0x03, 0x03, 0x03,
+ 0x04, 0x03, 0x05, 0x03, 0x06, 0x03, 0x07, 0x03,
+ 0x08, 0x03, 0x09, 0x03, 0x0A, 0x03, 0x0B, 0x03,
+ 0x0C, 0x03, 0x0D, 0x03, 0x0E, 0x03, 0x0F, 0x03,
+ 0x10, 0x03, 0x11, 0x03, 0x12, 0x03, 0x13, 0x03,
+ 0x14, 0x03, 0x15, 0x03, 0x16, 0x03, 0x17, 0x03,
+ 0x18, 0x03, 0x19, 0x03, 0x1A, 0x03, 0x1B, 0x03,
+ 0x1C, 0x03, 0x1D, 0x03, 0x1E, 0x03, 0x1F, 0x03,
+ 0x20, 0x03, 0x21, 0x03, 0x22, 0x03, 0x23, 0x03,
+ 0x24, 0x03, 0x25, 0x03, 0x26, 0x03, 0x27, 0x03,
+ 0x28, 0x03, 0x29, 0x03, 0x2A, 0x03, 0x2B, 0x03,
+ 0x2C, 0x03, 0x2D, 0x03, 0x2E, 0x03, 0x2F, 0x03,
+ 0x30, 0x03, 0x31, 0x03, 0x32, 0x03, 0x33, 0x03,
+ 0x34, 0x03, 0x35, 0x03, 0x36, 0x03, 0x37, 0x03,
+ 0x38, 0x03, 0x39, 0x03, 0x3A, 0x03, 0x3B, 0x03,
+ 0x3C, 0x03, 0x3D, 0x03, 0x3E, 0x03, 0x3F, 0x03,
+ 0x40, 0x03, 0x41, 0x03, 0x42, 0x03, 0x43, 0x03,
+ 0x44, 0x03, 0x45, 0x03, 0x46, 0x03, 0x47, 0x03,
+ 0x48, 0x03, 0x49, 0x03, 0x4A, 0x03, 0x4B, 0x03,
+ 0x4C, 0x03, 0x4D, 0x03, 0x4E, 0x03, 0x4F, 0x03,
+ 0x50, 0x03, 0x51, 0x03, 0x52, 0x03, 0x53, 0x03,
+ 0x54, 0x03, 0x55, 0x03, 0x56, 0x03, 0x57, 0x03,
+ 0x58, 0x03, 0x59, 0x03, 0x5A, 0x03, 0x5B, 0x03,
+ 0x5C, 0x03, 0x5D, 0x03, 0x5E, 0x03, 0x5F, 0x03,
+ 0x60, 0x03, 0x61, 0x03, 0x62, 0x03, 0x63, 0x03,
+ 0x64, 0x03, 0x65, 0x03, 0x66, 0x03, 0x67, 0x03,
+ 0x68, 0x03, 0x69, 0x03, 0x6A, 0x03, 0x6B, 0x03,
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+ 0xB4, 0x1D, 0xB5, 0x1D, 0xB6, 0x1D, 0xB7, 0x1D,
+ 0xB8, 0x1D, 0xB9, 0x1D, 0xBA, 0x1D, 0xBB, 0x1D,
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+ 0xC4, 0x1D, 0xC5, 0x1D, 0xC6, 0x1D, 0xC7, 0x1D,
+ 0xC8, 0x1D, 0xC9, 0x1D, 0xCA, 0x1D, 0xCB, 0x1D,
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+ 0xD4, 0x1D, 0xD5, 0x1D, 0xD6, 0x1D, 0xD7, 0x1D,
+ 0xD8, 0x1D, 0xD9, 0x1D, 0xDA, 0x1D, 0xDB, 0x1D,
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+ 0xE0, 0x1D, 0xE1, 0x1D, 0xE2, 0x1D, 0xE3, 0x1D,
+ 0xE4, 0x1D, 0xE5, 0x1D, 0xE6, 0x1D, 0xE7, 0x1D,
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+ 0xF0, 0x1D, 0xF1, 0x1D, 0xF2, 0x1D, 0xF3, 0x1D,
+ 0xF4, 0x1D, 0xF5, 0x1D, 0xF6, 0x1D, 0xF7, 0x1D,
+ 0xF8, 0x1D, 0xF9, 0x1D, 0xFA, 0x1D, 0xFB, 0x1D,
+ 0xFC, 0x1D, 0xFD, 0x1D, 0xFE, 0x1D, 0xFF, 0x1D,
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+ 0x14, 0x1E, 0x14, 0x1E, 0x16, 0x1E, 0x16, 0x1E,
+ 0x18, 0x1E, 0x18, 0x1E, 0x1A, 0x1E, 0x1A, 0x1E,
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+ 0x2C, 0x1E, 0x2C, 0x1E, 0x2E, 0x1E, 0x2E, 0x1E,
+ 0x30, 0x1E, 0x30, 0x1E, 0x32, 0x1E, 0x32, 0x1E,
+ 0x34, 0x1E, 0x34, 0x1E, 0x36, 0x1E, 0x36, 0x1E,
+ 0x38, 0x1E, 0x38, 0x1E, 0x3A, 0x1E, 0x3A, 0x1E,
+ 0x3C, 0x1E, 0x3C, 0x1E, 0x3E, 0x1E, 0x3E, 0x1E,
+ 0x40, 0x1E, 0x40, 0x1E, 0x42, 0x1E, 0x42, 0x1E,
+ 0x44, 0x1E, 0x44, 0x1E, 0x46, 0x1E, 0x46, 0x1E,
+ 0x48, 0x1E, 0x48, 0x1E, 0x4A, 0x1E, 0x4A, 0x1E,
+ 0x4C, 0x1E, 0x4C, 0x1E, 0x4E, 0x1E, 0x4E, 0x1E,
+ 0x50, 0x1E, 0x50, 0x1E, 0x52, 0x1E, 0x52, 0x1E,
+ 0x54, 0x1E, 0x54, 0x1E, 0x56, 0x1E, 0x56, 0x1E,
+ 0x58, 0x1E, 0x58, 0x1E, 0x5A, 0x1E, 0x5A, 0x1E,
+ 0x5C, 0x1E, 0x5C, 0x1E, 0x5E, 0x1E, 0x5E, 0x1E,
+ 0x60, 0x1E, 0x60, 0x1E, 0x62, 0x1E, 0x62, 0x1E,
+ 0x64, 0x1E, 0x64, 0x1E, 0x66, 0x1E, 0x66, 0x1E,
+ 0x68, 0x1E, 0x68, 0x1E, 0x6A, 0x1E, 0x6A, 0x1E,
+ 0x6C, 0x1E, 0x6C, 0x1E, 0x6E, 0x1E, 0x6E, 0x1E,
+ 0x70, 0x1E, 0x70, 0x1E, 0x72, 0x1E, 0x72, 0x1E,
+ 0x74, 0x1E, 0x74, 0x1E, 0x76, 0x1E, 0x76, 0x1E,
+ 0x78, 0x1E, 0x78, 0x1E, 0x7A, 0x1E, 0x7A, 0x1E,
+ 0x7C, 0x1E, 0x7C, 0x1E, 0x7E, 0x1E, 0x7E, 0x1E,
+ 0x80, 0x1E, 0x80, 0x1E, 0x82, 0x1E, 0x82, 0x1E,
+ 0x84, 0x1E, 0x84, 0x1E, 0x86, 0x1E, 0x86, 0x1E,
+ 0x88, 0x1E, 0x88, 0x1E, 0x8A, 0x1E, 0x8A, 0x1E,
+ 0x8C, 0x1E, 0x8C, 0x1E, 0x8E, 0x1E, 0x8E, 0x1E,
+ 0x90, 0x1E, 0x90, 0x1E, 0x92, 0x1E, 0x92, 0x1E,
+ 0x94, 0x1E, 0x94, 0x1E, 0x96, 0x1E, 0x97, 0x1E,
+ 0x98, 0x1E, 0x99, 0x1E, 0x9A, 0x1E, 0x9B, 0x1E,
+ 0x9C, 0x1E, 0x9D, 0x1E, 0x9E, 0x1E, 0x9F, 0x1E,
+ 0xA0, 0x1E, 0xA0, 0x1E, 0xA2, 0x1E, 0xA2, 0x1E,
+ 0xA4, 0x1E, 0xA4, 0x1E, 0xA6, 0x1E, 0xA6, 0x1E,
+ 0xA8, 0x1E, 0xA8, 0x1E, 0xAA, 0x1E, 0xAA, 0x1E,
+ 0xAC, 0x1E, 0xAC, 0x1E, 0xAE, 0x1E, 0xAE, 0x1E,
+ 0xB0, 0x1E, 0xB0, 0x1E, 0xB2, 0x1E, 0xB2, 0x1E,
+ 0xB4, 0x1E, 0xB4, 0x1E, 0xB6, 0x1E, 0xB6, 0x1E,
+ 0xB8, 0x1E, 0xB8, 0x1E, 0xBA, 0x1E, 0xBA, 0x1E,
+ 0xBC, 0x1E, 0xBC, 0x1E, 0xBE, 0x1E, 0xBE, 0x1E,
+ 0xC0, 0x1E, 0xC0, 0x1E, 0xC2, 0x1E, 0xC2, 0x1E,
+ 0xC4, 0x1E, 0xC4, 0x1E, 0xC6, 0x1E, 0xC6, 0x1E,
+ 0xC8, 0x1E, 0xC8, 0x1E, 0xCA, 0x1E, 0xCA, 0x1E,
+ 0xCC, 0x1E, 0xCC, 0x1E, 0xCE, 0x1E, 0xCE, 0x1E,
+ 0xD0, 0x1E, 0xD0, 0x1E, 0xD2, 0x1E, 0xD2, 0x1E,
+ 0xD4, 0x1E, 0xD4, 0x1E, 0xD6, 0x1E, 0xD6, 0x1E,
+ 0xD8, 0x1E, 0xD8, 0x1E, 0xDA, 0x1E, 0xDA, 0x1E,
+ 0xDC, 0x1E, 0xDC, 0x1E, 0xDE, 0x1E, 0xDE, 0x1E,
+ 0xE0, 0x1E, 0xE0, 0x1E, 0xE2, 0x1E, 0xE2, 0x1E,
+ 0xE4, 0x1E, 0xE4, 0x1E, 0xE6, 0x1E, 0xE6, 0x1E,
+ 0xE8, 0x1E, 0xE8, 0x1E, 0xEA, 0x1E, 0xEA, 0x1E,
+ 0xEC, 0x1E, 0xEC, 0x1E, 0xEE, 0x1E, 0xEE, 0x1E,
+ 0xF0, 0x1E, 0xF0, 0x1E, 0xF2, 0x1E, 0xF2, 0x1E,
+ 0xF4, 0x1E, 0xF4, 0x1E, 0xF6, 0x1E, 0xF6, 0x1E,
+ 0xF8, 0x1E, 0xF8, 0x1E, 0xFA, 0x1E, 0xFB, 0x1E,
+ 0xFC, 0x1E, 0xFD, 0x1E, 0xFE, 0x1E, 0xFF, 0x1E,
+ 0x08, 0x1F, 0x09, 0x1F, 0x0A, 0x1F, 0x0B, 0x1F,
+ 0x0C, 0x1F, 0x0D, 0x1F, 0x0E, 0x1F, 0x0F, 0x1F,
+ 0x08, 0x1F, 0x09, 0x1F, 0x0A, 0x1F, 0x0B, 0x1F,
+ 0x0C, 0x1F, 0x0D, 0x1F, 0x0E, 0x1F, 0x0F, 0x1F,
+ 0x18, 0x1F, 0x19, 0x1F, 0x1A, 0x1F, 0x1B, 0x1F,
+ 0x1C, 0x1F, 0x1D, 0x1F, 0x16, 0x1F, 0x17, 0x1F,
+ 0x18, 0x1F, 0x19, 0x1F, 0x1A, 0x1F, 0x1B, 0x1F,
+ 0x1C, 0x1F, 0x1D, 0x1F, 0x1E, 0x1F, 0x1F, 0x1F,
+ 0x28, 0x1F, 0x29, 0x1F, 0x2A, 0x1F, 0x2B, 0x1F,
+ 0x2C, 0x1F, 0x2D, 0x1F, 0x2E, 0x1F, 0x2F, 0x1F,
+ 0x28, 0x1F, 0x29, 0x1F, 0x2A, 0x1F, 0x2B, 0x1F,
+ 0x2C, 0x1F, 0x2D, 0x1F, 0x2E, 0x1F, 0x2F, 0x1F,
+ 0x38, 0x1F, 0x39, 0x1F, 0x3A, 0x1F, 0x3B, 0x1F,
+ 0x3C, 0x1F, 0x3D, 0x1F, 0x3E, 0x1F, 0x3F, 0x1F,
+ 0x38, 0x1F, 0x39, 0x1F, 0x3A, 0x1F, 0x3B, 0x1F,
+ 0x3C, 0x1F, 0x3D, 0x1F, 0x3E, 0x1F, 0x3F, 0x1F,
+ 0x48, 0x1F, 0x49, 0x1F, 0x4A, 0x1F, 0x4B, 0x1F,
+ 0x4C, 0x1F, 0x4D, 0x1F, 0x46, 0x1F, 0x47, 0x1F,
+ 0x48, 0x1F, 0x49, 0x1F, 0x4A, 0x1F, 0x4B, 0x1F,
+ 0x4C, 0x1F, 0x4D, 0x1F, 0x4E, 0x1F, 0x4F, 0x1F,
+ 0x50, 0x1F, 0x59, 0x1F, 0x52, 0x1F, 0x5B, 0x1F,
+ 0x54, 0x1F, 0x5D, 0x1F, 0x56, 0x1F, 0x5F, 0x1F,
+ 0x58, 0x1F, 0x59, 0x1F, 0x5A, 0x1F, 0x5B, 0x1F,
+ 0x5C, 0x1F, 0x5D, 0x1F, 0x5E, 0x1F, 0x5F, 0x1F,
+ 0x68, 0x1F, 0x69, 0x1F, 0x6A, 0x1F, 0x6B, 0x1F,
+ 0x6C, 0x1F, 0x6D, 0x1F, 0x6E, 0x1F, 0x6F, 0x1F,
+ 0x68, 0x1F, 0x69, 0x1F, 0x6A, 0x1F, 0x6B, 0x1F,
+ 0x6C, 0x1F, 0x6D, 0x1F, 0x6E, 0x1F, 0x6F, 0x1F,
+ 0xBA, 0x1F, 0xBB, 0x1F, 0xC8, 0x1F, 0xC9, 0x1F,
+ 0xCA, 0x1F, 0xCB, 0x1F, 0xDA, 0x1F, 0xDB, 0x1F,
+ 0xF8, 0x1F, 0xF9, 0x1F, 0xEA, 0x1F, 0xEB, 0x1F,
+ 0xFA, 0x1F, 0xFB, 0x1F, 0x7E, 0x1F, 0x7F, 0x1F,
+ 0x88, 0x1F, 0x89, 0x1F, 0x8A, 0x1F, 0x8B, 0x1F,
+ 0x8C, 0x1F, 0x8D, 0x1F, 0x8E, 0x1F, 0x8F, 0x1F,
+ 0x88, 0x1F, 0x89, 0x1F, 0x8A, 0x1F, 0x8B, 0x1F,
+ 0x8C, 0x1F, 0x8D, 0x1F, 0x8E, 0x1F, 0x8F, 0x1F,
+ 0x98, 0x1F, 0x99, 0x1F, 0x9A, 0x1F, 0x9B, 0x1F,
+ 0x9C, 0x1F, 0x9D, 0x1F, 0x9E, 0x1F, 0x9F, 0x1F,
+ 0x98, 0x1F, 0x99, 0x1F, 0x9A, 0x1F, 0x9B, 0x1F,
+ 0x9C, 0x1F, 0x9D, 0x1F, 0x9E, 0x1F, 0x9F, 0x1F,
+ 0xA8, 0x1F, 0xA9, 0x1F, 0xAA, 0x1F, 0xAB, 0x1F,
+ 0xAC, 0x1F, 0xAD, 0x1F, 0xAE, 0x1F, 0xAF, 0x1F,
+ 0xA8, 0x1F, 0xA9, 0x1F, 0xAA, 0x1F, 0xAB, 0x1F,
+ 0xAC, 0x1F, 0xAD, 0x1F, 0xAE, 0x1F, 0xAF, 0x1F,
+ 0xB8, 0x1F, 0xB9, 0x1F, 0xB2, 0x1F, 0xBC, 0x1F,
+ 0xB4, 0x1F, 0xB5, 0x1F, 0xB6, 0x1F, 0xB7, 0x1F,
+ 0xB8, 0x1F, 0xB9, 0x1F, 0xBA, 0x1F, 0xBB, 0x1F,
+ 0xBC, 0x1F, 0xBD, 0x1F, 0xBE, 0x1F, 0xBF, 0x1F,
+ 0xC0, 0x1F, 0xC1, 0x1F, 0xC2, 0x1F, 0xC3, 0x1F,
+ 0xC4, 0x1F, 0xC5, 0x1F, 0xC6, 0x1F, 0xC7, 0x1F,
+ 0xC8, 0x1F, 0xC9, 0x1F, 0xCA, 0x1F, 0xCB, 0x1F,
+ 0xC3, 0x1F, 0xCD, 0x1F, 0xCE, 0x1F, 0xCF, 0x1F,
+ 0xD8, 0x1F, 0xD9, 0x1F, 0xD2, 0x1F, 0xD3, 0x1F,
+ 0xD4, 0x1F, 0xD5, 0x1F, 0xD6, 0x1F, 0xD7, 0x1F,
+ 0xD8, 0x1F, 0xD9, 0x1F, 0xDA, 0x1F, 0xDB, 0x1F,
+ 0xDC, 0x1F, 0xDD, 0x1F, 0xDE, 0x1F, 0xDF, 0x1F,
+ 0xE8, 0x1F, 0xE9, 0x1F, 0xE2, 0x1F, 0xE3, 0x1F,
+ 0xE4, 0x1F, 0xEC, 0x1F, 0xE6, 0x1F, 0xE7, 0x1F,
+ 0xE8, 0x1F, 0xE9, 0x1F, 0xEA, 0x1F, 0xEB, 0x1F,
+ 0xEC, 0x1F, 0xED, 0x1F, 0xEE, 0x1F, 0xEF, 0x1F,
+ 0xF0, 0x1F, 0xF1, 0x1F, 0xF2, 0x1F, 0xF3, 0x1F,
+ 0xF4, 0x1F, 0xF5, 0x1F, 0xF6, 0x1F, 0xF7, 0x1F,
+ 0xF8, 0x1F, 0xF9, 0x1F, 0xFA, 0x1F, 0xFB, 0x1F,
+ 0xF3, 0x1F, 0xFD, 0x1F, 0xFE, 0x1F, 0xFF, 0x1F,
+ 0x00, 0x20, 0x01, 0x20, 0x02, 0x20, 0x03, 0x20,
+ 0x04, 0x20, 0x05, 0x20, 0x06, 0x20, 0x07, 0x20,
+ 0x08, 0x20, 0x09, 0x20, 0x0A, 0x20, 0x0B, 0x20,
+ 0x0C, 0x20, 0x0D, 0x20, 0x0E, 0x20, 0x0F, 0x20,
+ 0x10, 0x20, 0x11, 0x20, 0x12, 0x20, 0x13, 0x20,
+ 0x14, 0x20, 0x15, 0x20, 0x16, 0x20, 0x17, 0x20,
+ 0x18, 0x20, 0x19, 0x20, 0x1A, 0x20, 0x1B, 0x20,
+ 0x1C, 0x20, 0x1D, 0x20, 0x1E, 0x20, 0x1F, 0x20,
+ 0x20, 0x20, 0x21, 0x20, 0x22, 0x20, 0x23, 0x20,
+ 0x24, 0x20, 0x25, 0x20, 0x26, 0x20, 0x27, 0x20,
+ 0x28, 0x20, 0x29, 0x20, 0x2A, 0x20, 0x2B, 0x20,
+ 0x2C, 0x20, 0x2D, 0x20, 0x2E, 0x20, 0x2F, 0x20,
+ 0x30, 0x20, 0x31, 0x20, 0x32, 0x20, 0x33, 0x20,
+ 0x34, 0x20, 0x35, 0x20, 0x36, 0x20, 0x37, 0x20,
+ 0x38, 0x20, 0x39, 0x20, 0x3A, 0x20, 0x3B, 0x20,
+ 0x3C, 0x20, 0x3D, 0x20, 0x3E, 0x20, 0x3F, 0x20,
+ 0x40, 0x20, 0x41, 0x20, 0x42, 0x20, 0x43, 0x20,
+ 0x44, 0x20, 0x45, 0x20, 0x46, 0x20, 0x47, 0x20,
+ 0x48, 0x20, 0x49, 0x20, 0x4A, 0x20, 0x4B, 0x20,
+ 0x4C, 0x20, 0x4D, 0x20, 0x4E, 0x20, 0x4F, 0x20,
+ 0x50, 0x20, 0x51, 0x20, 0x52, 0x20, 0x53, 0x20,
+ 0x54, 0x20, 0x55, 0x20, 0x56, 0x20, 0x57, 0x20,
+ 0x58, 0x20, 0x59, 0x20, 0x5A, 0x20, 0x5B, 0x20,
+ 0x5C, 0x20, 0x5D, 0x20, 0x5E, 0x20, 0x5F, 0x20,
+ 0x60, 0x20, 0x61, 0x20, 0x62, 0x20, 0x63, 0x20,
+ 0x64, 0x20, 0x65, 0x20, 0x66, 0x20, 0x67, 0x20,
+ 0x68, 0x20, 0x69, 0x20, 0x6A, 0x20, 0x6B, 0x20,
+ 0x6C, 0x20, 0x6D, 0x20, 0x6E, 0x20, 0x6F, 0x20,
+ 0x70, 0x20, 0x71, 0x20, 0x72, 0x20, 0x73, 0x20,
+ 0x74, 0x20, 0x75, 0x20, 0x76, 0x20, 0x77, 0x20,
+ 0x78, 0x20, 0x79, 0x20, 0x7A, 0x20, 0x7B, 0x20,
+ 0x7C, 0x20, 0x7D, 0x20, 0x7E, 0x20, 0x7F, 0x20,
+ 0x80, 0x20, 0x81, 0x20, 0x82, 0x20, 0x83, 0x20,
+ 0x84, 0x20, 0x85, 0x20, 0x86, 0x20, 0x87, 0x20,
+ 0x88, 0x20, 0x89, 0x20, 0x8A, 0x20, 0x8B, 0x20,
+ 0x8C, 0x20, 0x8D, 0x20, 0x8E, 0x20, 0x8F, 0x20,
+ 0x90, 0x20, 0x91, 0x20, 0x92, 0x20, 0x93, 0x20,
+ 0x94, 0x20, 0x95, 0x20, 0x96, 0x20, 0x97, 0x20,
+ 0x98, 0x20, 0x99, 0x20, 0x9A, 0x20, 0x9B, 0x20,
+ 0x9C, 0x20, 0x9D, 0x20, 0x9E, 0x20, 0x9F, 0x20,
+ 0xA0, 0x20, 0xA1, 0x20, 0xA2, 0x20, 0xA3, 0x20,
+ 0xA4, 0x20, 0xA5, 0x20, 0xA6, 0x20, 0xA7, 0x20,
+ 0xA8, 0x20, 0xA9, 0x20, 0xAA, 0x20, 0xAB, 0x20,
+ 0xAC, 0x20, 0xAD, 0x20, 0xAE, 0x20, 0xAF, 0x20,
+ 0xB0, 0x20, 0xB1, 0x20, 0xB2, 0x20, 0xB3, 0x20,
+ 0xB4, 0x20, 0xB5, 0x20, 0xB6, 0x20, 0xB7, 0x20,
+ 0xB8, 0x20, 0xB9, 0x20, 0xBA, 0x20, 0xBB, 0x20,
+ 0xBC, 0x20, 0xBD, 0x20, 0xBE, 0x20, 0xBF, 0x20,
+ 0xC0, 0x20, 0xC1, 0x20, 0xC2, 0x20, 0xC3, 0x20,
+ 0xC4, 0x20, 0xC5, 0x20, 0xC6, 0x20, 0xC7, 0x20,
+ 0xC8, 0x20, 0xC9, 0x20, 0xCA, 0x20, 0xCB, 0x20,
+ 0xCC, 0x20, 0xCD, 0x20, 0xCE, 0x20, 0xCF, 0x20,
+ 0xD0, 0x20, 0xD1, 0x20, 0xD2, 0x20, 0xD3, 0x20,
+ 0xD4, 0x20, 0xD5, 0x20, 0xD6, 0x20, 0xD7, 0x20,
+ 0xD8, 0x20, 0xD9, 0x20, 0xDA, 0x20, 0xDB, 0x20,
+ 0xDC, 0x20, 0xDD, 0x20, 0xDE, 0x20, 0xDF, 0x20,
+ 0xE0, 0x20, 0xE1, 0x20, 0xE2, 0x20, 0xE3, 0x20,
+ 0xE4, 0x20, 0xE5, 0x20, 0xE6, 0x20, 0xE7, 0x20,
+ 0xE8, 0x20, 0xE9, 0x20, 0xEA, 0x20, 0xEB, 0x20,
+ 0xEC, 0x20, 0xED, 0x20, 0xEE, 0x20, 0xEF, 0x20,
+ 0xF0, 0x20, 0xF1, 0x20, 0xF2, 0x20, 0xF3, 0x20,
+ 0xF4, 0x20, 0xF5, 0x20, 0xF6, 0x20, 0xF7, 0x20,
+ 0xF8, 0x20, 0xF9, 0x20, 0xFA, 0x20, 0xFB, 0x20,
+ 0xFC, 0x20, 0xFD, 0x20, 0xFE, 0x20, 0xFF, 0x20,
+ 0x00, 0x21, 0x01, 0x21, 0x02, 0x21, 0x03, 0x21,
+ 0x04, 0x21, 0x05, 0x21, 0x06, 0x21, 0x07, 0x21,
+ 0x08, 0x21, 0x09, 0x21, 0x0A, 0x21, 0x0B, 0x21,
+ 0x0C, 0x21, 0x0D, 0x21, 0x0E, 0x21, 0x0F, 0x21,
+ 0x10, 0x21, 0x11, 0x21, 0x12, 0x21, 0x13, 0x21,
+ 0x14, 0x21, 0x15, 0x21, 0x16, 0x21, 0x17, 0x21,
+ 0x18, 0x21, 0x19, 0x21, 0x1A, 0x21, 0x1B, 0x21,
+ 0x1C, 0x21, 0x1D, 0x21, 0x1E, 0x21, 0x1F, 0x21,
+ 0x20, 0x21, 0x21, 0x21, 0x22, 0x21, 0x23, 0x21,
+ 0x24, 0x21, 0x25, 0x21, 0x26, 0x21, 0x27, 0x21,
+ 0x28, 0x21, 0x29, 0x21, 0x2A, 0x21, 0x2B, 0x21,
+ 0x2C, 0x21, 0x2D, 0x21, 0x2E, 0x21, 0x2F, 0x21,
+ 0x30, 0x21, 0x31, 0x21, 0x32, 0x21, 0x33, 0x21,
+ 0x34, 0x21, 0x35, 0x21, 0x36, 0x21, 0x37, 0x21,
+ 0x38, 0x21, 0x39, 0x21, 0x3A, 0x21, 0x3B, 0x21,
+ 0x3C, 0x21, 0x3D, 0x21, 0x3E, 0x21, 0x3F, 0x21,
+ 0x40, 0x21, 0x41, 0x21, 0x42, 0x21, 0x43, 0x21,
+ 0x44, 0x21, 0x45, 0x21, 0x46, 0x21, 0x47, 0x21,
+ 0x48, 0x21, 0x49, 0x21, 0x4A, 0x21, 0x4B, 0x21,
+ 0x4C, 0x21, 0x4D, 0x21, 0x32, 0x21, 0x4F, 0x21,
+ 0x50, 0x21, 0x51, 0x21, 0x52, 0x21, 0x53, 0x21,
+ 0x54, 0x21, 0x55, 0x21, 0x56, 0x21, 0x57, 0x21,
+ 0x58, 0x21, 0x59, 0x21, 0x5A, 0x21, 0x5B, 0x21,
+ 0x5C, 0x21, 0x5D, 0x21, 0x5E, 0x21, 0x5F, 0x21,
+ 0x60, 0x21, 0x61, 0x21, 0x62, 0x21, 0x63, 0x21,
+ 0x64, 0x21, 0x65, 0x21, 0x66, 0x21, 0x67, 0x21,
+ 0x68, 0x21, 0x69, 0x21, 0x6A, 0x21, 0x6B, 0x21,
+ 0x6C, 0x21, 0x6D, 0x21, 0x6E, 0x21, 0x6F, 0x21,
+ 0x60, 0x21, 0x61, 0x21, 0x62, 0x21, 0x63, 0x21,
+ 0x64, 0x21, 0x65, 0x21, 0x66, 0x21, 0x67, 0x21,
+ 0x68, 0x21, 0x69, 0x21, 0x6A, 0x21, 0x6B, 0x21,
+ 0x6C, 0x21, 0x6D, 0x21, 0x6E, 0x21, 0x6F, 0x21,
+ 0x80, 0x21, 0x81, 0x21, 0x82, 0x21, 0x83, 0x21,
+ 0x83, 0x21, 0xFF, 0xFF, 0x4B, 0x03, 0xB6, 0x24,
+ 0xB7, 0x24, 0xB8, 0x24, 0xB9, 0x24, 0xBA, 0x24,
+ 0xBB, 0x24, 0xBC, 0x24, 0xBD, 0x24, 0xBE, 0x24,
+ 0xBF, 0x24, 0xC0, 0x24, 0xC1, 0x24, 0xC2, 0x24,
+ 0xC3, 0x24, 0xC4, 0x24, 0xC5, 0x24, 0xC6, 0x24,
+ 0xC7, 0x24, 0xC8, 0x24, 0xC9, 0x24, 0xCA, 0x24,
+ 0xCB, 0x24, 0xCC, 0x24, 0xCD, 0x24, 0xCE, 0x24,
+ 0xCF, 0x24, 0xFF, 0xFF, 0x46, 0x07, 0x00, 0x2C,
+ 0x01, 0x2C, 0x02, 0x2C, 0x03, 0x2C, 0x04, 0x2C,
+ 0x05, 0x2C, 0x06, 0x2C, 0x07, 0x2C, 0x08, 0x2C,
+ 0x09, 0x2C, 0x0A, 0x2C, 0x0B, 0x2C, 0x0C, 0x2C,
+ 0x0D, 0x2C, 0x0E, 0x2C, 0x0F, 0x2C, 0x10, 0x2C,
+ 0x11, 0x2C, 0x12, 0x2C, 0x13, 0x2C, 0x14, 0x2C,
+ 0x15, 0x2C, 0x16, 0x2C, 0x17, 0x2C, 0x18, 0x2C,
+ 0x19, 0x2C, 0x1A, 0x2C, 0x1B, 0x2C, 0x1C, 0x2C,
+ 0x1D, 0x2C, 0x1E, 0x2C, 0x1F, 0x2C, 0x20, 0x2C,
+ 0x21, 0x2C, 0x22, 0x2C, 0x23, 0x2C, 0x24, 0x2C,
+ 0x25, 0x2C, 0x26, 0x2C, 0x27, 0x2C, 0x28, 0x2C,
+ 0x29, 0x2C, 0x2A, 0x2C, 0x2B, 0x2C, 0x2C, 0x2C,
+ 0x2D, 0x2C, 0x2E, 0x2C, 0x5F, 0x2C, 0x60, 0x2C,
+ 0x60, 0x2C, 0x62, 0x2C, 0x63, 0x2C, 0x64, 0x2C,
+ 0x65, 0x2C, 0x66, 0x2C, 0x67, 0x2C, 0x67, 0x2C,
+ 0x69, 0x2C, 0x69, 0x2C, 0x6B, 0x2C, 0x6B, 0x2C,
+ 0x6D, 0x2C, 0x6E, 0x2C, 0x6F, 0x2C, 0x70, 0x2C,
+ 0x71, 0x2C, 0x72, 0x2C, 0x73, 0x2C, 0x74, 0x2C,
+ 0x75, 0x2C, 0x75, 0x2C, 0x77, 0x2C, 0x78, 0x2C,
+ 0x79, 0x2C, 0x7A, 0x2C, 0x7B, 0x2C, 0x7C, 0x2C,
+ 0x7D, 0x2C, 0x7E, 0x2C, 0x7F, 0x2C, 0x80, 0x2C,
+ 0x80, 0x2C, 0x82, 0x2C, 0x82, 0x2C, 0x84, 0x2C,
+ 0x84, 0x2C, 0x86, 0x2C, 0x86, 0x2C, 0x88, 0x2C,
+ 0x88, 0x2C, 0x8A, 0x2C, 0x8A, 0x2C, 0x8C, 0x2C,
+ 0x8C, 0x2C, 0x8E, 0x2C, 0x8E, 0x2C, 0x90, 0x2C,
+ 0x90, 0x2C, 0x92, 0x2C, 0x92, 0x2C, 0x94, 0x2C,
+ 0x94, 0x2C, 0x96, 0x2C, 0x96, 0x2C, 0x98, 0x2C,
+ 0x98, 0x2C, 0x9A, 0x2C, 0x9A, 0x2C, 0x9C, 0x2C,
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+ 0x92, 0xFF, 0x93, 0xFF, 0x94, 0xFF, 0x95, 0xFF,
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+ 0x9A, 0xFF, 0x9B, 0xFF, 0x9C, 0xFF, 0x9D, 0xFF,
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+ 0xA2, 0xFF, 0xA3, 0xFF, 0xA4, 0xFF, 0xA5, 0xFF,
+ 0xA6, 0xFF, 0xA7, 0xFF, 0xA8, 0xFF, 0xA9, 0xFF,
+ 0xAA, 0xFF, 0xAB, 0xFF, 0xAC, 0xFF, 0xAD, 0xFF,
+ 0xAE, 0xFF, 0xAF, 0xFF, 0xB0, 0xFF, 0xB1, 0xFF,
+ 0xB2, 0xFF, 0xB3, 0xFF, 0xB4, 0xFF, 0xB5, 0xFF,
+ 0xB6, 0xFF, 0xB7, 0xFF, 0xB8, 0xFF, 0xB9, 0xFF,
+ 0xBA, 0xFF, 0xBB, 0xFF, 0xBC, 0xFF, 0xBD, 0xFF,
+ 0xBE, 0xFF, 0xBF, 0xFF, 0xC0, 0xFF, 0xC1, 0xFF,
+ 0xC2, 0xFF, 0xC3, 0xFF, 0xC4, 0xFF, 0xC5, 0xFF,
+ 0xC6, 0xFF, 0xC7, 0xFF, 0xC8, 0xFF, 0xC9, 0xFF,
+ 0xCA, 0xFF, 0xCB, 0xFF, 0xCC, 0xFF, 0xCD, 0xFF,
+ 0xCE, 0xFF, 0xCF, 0xFF, 0xD0, 0xFF, 0xD1, 0xFF,
+ 0xD2, 0xFF, 0xD3, 0xFF, 0xD4, 0xFF, 0xD5, 0xFF,
+ 0xD6, 0xFF, 0xD7, 0xFF, 0xD8, 0xFF, 0xD9, 0xFF,
+ 0xDA, 0xFF, 0xDB, 0xFF, 0xDC, 0xFF, 0xDD, 0xFF,
+ 0xDE, 0xFF, 0xDF, 0xFF, 0xE0, 0xFF, 0xE1, 0xFF,
+ 0xE2, 0xFF, 0xE3, 0xFF, 0xE4, 0xFF, 0xE5, 0xFF,
+ 0xE6, 0xFF, 0xE7, 0xFF, 0xE8, 0xFF, 0xE9, 0xFF,
+ 0xEA, 0xFF, 0xEB, 0xFF, 0xEC, 0xFF, 0xED, 0xFF,
+ 0xEE, 0xFF, 0xEF, 0xFF, 0xF0, 0xFF, 0xF1, 0xFF,
+ 0xF2, 0xFF, 0xF3, 0xFF, 0xF4, 0xFF, 0xF5, 0xFF,
+ 0xF6, 0xFF, 0xF7, 0xFF, 0xF8, 0xFF, 0xF9, 0xFF,
+ 0xFA, 0xFF, 0xFB, 0xFF, 0xFC, 0xFF, 0xFD, 0xFF,
+ 0xFE, 0xFF, 0xFF, 0xFF
+};
--
2.23.0
^ permalink raw reply related [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-08-28 16:08 [PATCH] staging: exfat: add exfat filesystem code to staging Greg Kroah-Hartman
@ 2019-09-14 13:39 ` Park Ju Hyung
2019-09-15 13:54 ` Greg KH
0 siblings, 1 reply; 24+ messages in thread
From: Park Ju Hyung @ 2019-09-14 13:39 UTC (permalink / raw)
To: gregkh
Cc: alexander.levin, devel, linux-fsdevel, linux-kernel, valdis.kletnieks
Hi.
I just noticed that this exfat-staging drivers are based on the old
Samsung's 1.x exFAT drivers.
I've been working to get the newer Samsung's driver(now named "sdFAT")
to fit better for general Linux users, and I believe it can provide a
better base for the community to work on(and hopefully complies better
to the mainline coding standard).
GitHub link
https://github.com/arter97/exfat-linux
I also included some rudimentary benchmark results.
I encourage mainline developers to explore this driver base and see if
it's worth to switch, since it's the early days of exfat-staging.
To others watching this thread:
It's more than likely that you can start using exFAT reliably right
away by following the link above. It's tested on all major LTS kernels
ranging from 3.4 to 4.19 and the ones Canonical uses for Ubuntu: 3.4,
3.10, 3.18, 4.1, 4.4, 4.9, 4.14, 4.19 and 4.15, 5.0, 5.2, and 5.3-rc.
Thanks.
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-14 13:39 ` [PATCH] staging: exfat: add exfat filesystem code to Park Ju Hyung
@ 2019-09-15 13:54 ` Greg KH
2019-09-15 16:11 ` Ju Hyung Park
0 siblings, 1 reply; 24+ messages in thread
From: Greg KH @ 2019-09-15 13:54 UTC (permalink / raw)
To: Park Ju Hyung
Cc: alexander.levin, devel, linux-fsdevel, linux-kernel, valdis.kletnieks
On Sat, Sep 14, 2019 at 10:39:51PM +0900, Park Ju Hyung wrote:
> Hi.
>
> I just noticed that this exfat-staging drivers are based on the old
> Samsung's 1.x exFAT drivers.
>
> I've been working to get the newer Samsung's driver(now named "sdFAT")
> to fit better for general Linux users, and I believe it can provide a
> better base for the community to work on(and hopefully complies better
> to the mainline coding standard).
>
> GitHub link
> https://github.com/arter97/exfat-linux
>
> I also included some rudimentary benchmark results.
>
> I encourage mainline developers to explore this driver base and see if
> it's worth to switch, since it's the early days of exfat-staging.
Note, this just showed up publically on August 12, where were you with
all of this new code before then? :)
> To others watching this thread:
> It's more than likely that you can start using exFAT reliably right
> away by following the link above. It's tested on all major LTS kernels
> ranging from 3.4 to 4.19 and the ones Canonical uses for Ubuntu: 3.4,
> 3.10, 3.18, 4.1, 4.4, 4.9, 4.14, 4.19 and 4.15, 5.0, 5.2, and 5.3-rc.
For the in-kernel code, we would have to rip out all of the work you did
for all older kernels, so that's a non-starter right there.
As for what codebase to work off of, I don't want to say it is too late,
but really, this shows up from nowhere and we had to pick something so
we found the best we could at that point in time.
Is there anything specific in the codebase you have now, that is lacking
in the in-kernel code? Old-kernel-support doesn't count here, as we
don't care about that as it is not applicable. But functionality does
matter, what has been added here that we can make use of?
And do you have any "real" development history to look at instead of the
"one giant commit" of the initial code drop? That is where we could
actually learn what has changed over time. Your repo as-is shows none
of the interesting bits :(
thanks,
greg kh
^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [PATCH] staging: exfat: add exfat filesystem code to
2019-09-15 13:54 ` Greg KH
@ 2019-09-15 16:11 ` Ju Hyung Park
0 siblings, 0 replies; 24+ messages in thread
From: Ju Hyung Park @ 2019-09-15 16:11 UTC (permalink / raw)
To: Greg KH
Cc: alexander.levin, devel, linux-fsdevel, linux-kernel, Valdis Kletnieks
Hi Greg,
On Sun, Sep 15, 2019 at 10:54 PM Greg KH <gregkh@linuxfoundation.org> wrote:
> Note, this just showed up publically on August 12, where were you with
> all of this new code before then? :)
My sdFAT port, exfat-nofuse and the one on the staging tree, were all
made by Samsung.
And unless you guys had a chance to talk to Samsung developers
directly, those all share the same faith of lacking proper development
history.
The source I used was from http://opensource.samsung.com, which
provides kernel sources as tar.gz files.
There is no code history available.
> For the in-kernel code, we would have to rip out all of the work you did
> for all older kernels, so that's a non-starter right there.
I'm aware.
I'm just letting mainline know that there is potentially another (much
better) base that could be upstreamed.
If you want me to rip out older kernel support for upstreaming, I'm
more than happy to do so.
> As for what codebase to work off of, I don't want to say it is too late,
> but really, this shows up from nowhere and we had to pick something so
> we found the best we could at that point in time.
To be honest, whole public exFAT sources are all from nowhere unless
you had internal access to Samsung's development archive.
The one in the current staging tree isn't any better.
I'm not even sure where the staging driver is from, actually.
Samsung used the 1.2.x versioning until they switched to a new code
base - sdFAT.
The one in the staging tree is marked version 1.3.0(exfat_super.c).
I failed to find anything 1.3.x from Samsung's public kernel sources.
The last time exFAT 1.2.x was used was in Galaxy S7(released in 2016).
Mine was originally based on sdFAT 2.1.10, used in Galaxy S10(released
in March 2019) and it just got updated to 2.2.0, used in Galaxy
Note10(released in August 2019).
> Is there anything specific in the codebase you have now, that is lacking
> in the in-kernel code? Old-kernel-support doesn't count here, as we
> don't care about that as it is not applicable. But functionality does
> matter, what has been added here that we can make use of?
This is more of a suggestion of
"Let's base on a *much more recent* snapshot for the community to work on",
since the current one on the staging tree also lacks development history.
The diff is way too big to even start understanding the difference.
With that said though, I do have some vague but real reason as to why
sdFAT base is better.
With some major Android vendors showing interests in supporting exFAT,
Motorola notably published their work on public Git repository with
full development history(the only vendor to do this that I'm aware
of).
Commits like this:
https://github.com/MotorolaMobilityLLC/kernel-msm/commit/7ab1657 is
not merged to exFAT(including the current staging tree one) while it
did for sdFAT.
The only thing I regret is not working on porting sdFAT sooner.
I definitely didn't anticipate Microsoft to suddenly lift legal issues
on upstreaming exFAT just around when I happen to gain interest in
porting sdFAT.
If my port happened sooner, it would have been a no-brainer for it to
be considered as a top candidate for upstreaming.
> And do you have any "real" development history to look at instead of the
> "one giant commit" of the initial code drop? That is where we could
> actually learn what has changed over time. Your repo as-is shows none
> of the interesting bits :(
As I mentioned, development history is unobtainable, even for the
current staging tree or exfat-nofuse.
(If you guys took exfat-nofuse, you can also see that there's barely
any real exFAT-related development done in that tree. Everything is
basically fixes for newer kernel versions.)
The best I could do, if someone's interested, is to diff all versions
of exFAT/sdFAT throughout the Samsung's kernel versions, but that
still won't give us reasons as to why the changes were made.
TL;DR
My suggestion - Let's base on a much newer driver that's matured more,
contains more fixes, gives (slightly?) better performance and
hopefully has better code quality.
Both drivers are horrible.
You said it yourself(for the current staging one), and even for my new
sdFAT-base proposal, I'm definitely not comfortable seeing this kind
of crap in mainline:
https://github.com/arter97/exfat-linux/commit/0f1ddde
However, it's clear to me that the sdFAT base is less-horrible.
Please let me know what you think.
> thanks,
>
> greg kh
Thanks.
^ permalink raw reply [flat|nested] 24+ messages in thread
end of thread, other threads:[~2019-09-30 14:08 UTC | newest]
Thread overview: 24+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <CGME20190917025738epcas1p1f1dd21ca50df2392b0f84f0340d82bcd@epcas1p1.samsung.com>
[not found] ` <003601d56d03$aa04fa00$fe0eee00$@samsung.com>
2019-09-17 3:02 ` [PATCH] staging: exfat: add exfat filesystem code to Namjae Jeon
2019-09-17 4:19 ` Valdis Klētnieks
2019-09-17 5:31 ` Park Ju Hyung
2019-09-17 5:47 ` Greg KH
2019-09-17 6:04 ` Ju Hyung Park
2019-09-18 2:35 ` Namjae Jeon
2019-09-18 6:16 ` 'Greg KH'
2019-09-18 6:33 ` Sergey Senozhatsky
2019-09-18 8:26 ` 'Greg KH'
2019-09-18 8:51 ` Sergey Senozhatsky
2019-09-18 9:01 ` Ju Hyung Park
2019-09-18 9:24 ` Dan Carpenter
2019-09-18 9:53 ` Ju Hyung Park
2019-09-18 10:08 ` Dan Carpenter
2019-09-18 10:46 ` Ju Hyung Park
2019-09-18 11:05 ` Greg KH
2019-09-19 2:14 ` Namjae Jeon
2019-09-30 4:25 ` Namjae Jeon
2019-09-30 6:08 ` 'Greg KH'
2019-09-17 4:56 ` 'Greg KH'
2019-09-17 5:15 ` Gao Xiang
2019-08-28 16:08 [PATCH] staging: exfat: add exfat filesystem code to staging Greg Kroah-Hartman
2019-09-14 13:39 ` [PATCH] staging: exfat: add exfat filesystem code to Park Ju Hyung
2019-09-15 13:54 ` Greg KH
2019-09-15 16:11 ` Ju Hyung Park
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