[Buildroot] [PATCH v2 0/2] Add support for AXFS filesystem type

[Buildroot] [PATCH v2 0/2] Add support for AXFS filesystem type

[Ariel D'Alessandro]

This patch series adds support for using the AXFS filesystem type.

The Advanced XIP File System is a Linux kernel filesystem driver that enables
files to be executed directly from flash or ROM memory rather than being copied
into RAM.

More info can be found here: http://elinux.org/AXFS

Changes from v1:
* Removed unnecessary call to $(generic-package) in axfsutils.mk.

Ariel

Ariel D'Alessandro (2):
  axfsutils: add new package
  axfs: add new filesystem type

 fs/Config.in                   |  1 +
 fs/axfs/Config.in              |  4 ++++
 fs/axfs/axfs.mk                | 13 +++++++++++++
 package/axfsutils/axfsutils.mk | 20 ++++++++++++++++++++
 4 files changed, 38 insertions(+)
 create mode 100644 fs/axfs/Config.in
 create mode 100644 fs/axfs/axfs.mk
 create mode 100644 package/axfsutils/axfsutils.mk

-- 
1.9.1

[Buildroot] [PATCH v2 1/2] axfsutils: add new package

[Ariel D'Alessandro]

Tools for building AXFS Filesystem.

The Advanced XIP File System is a Linux kernel filesystem driver that enables
files to be executed directly from flash or ROM memory rather than being copied
into RAM.

Source:
	https://github.com/jaredeh/axfs

Signed-off-by: Ariel D'Alessandro <ariel@vanguardiasur.com.ar>
---
 package/axfsutils/axfsutils.mk | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 package/axfsutils/axfsutils.mk

diff --git a/package/axfsutils/axfsutils.mk b/package/axfsutils/axfsutils.mk
new file mode 100644
index 0000000..ce5b892
--- /dev/null
+++ b/package/axfsutils/axfsutils.mk
@@ -0,0 +1,20 @@
+################################################################################
+#
+# axfsutils
+#
+################################################################################
+
+AXFSUTILS_VERSION = f26ae785e33df76f658b71ef2cfbc7f511ff875d
+AXFSUTILS_SITE = $(call github,jaredeh,axfs,$(AXFSUTILS_VERSION))
+AXFSUTILS_LICENSE = GPLv2
+AXFSUTILS_LICENSE_FILES = COPYING
+
+define HOST_AXFSUTILS_BUILD_CMDS
+	$(HOST_MAKE_ENV) $(MAKE) -C $(@D)/mkfs.axfs-legacy
+endef
+
+define HOST_AXFSUTILS_INSTALL_CMDS
+	cp $(@D)/mkfs.axfs-legacy/mkfs.axfs $(HOST_DIR)/usr/bin/
+endef
+
+$(eval $(host-generic-package))
-- 
1.9.1

[Buildroot] [PATCH v2 2/2] axfs: add new filesystem type

[Ariel D'Alessandro]

The Advanced XIP File System is a Linux kernel filesystem driver that enables
files to be executed directly from flash or ROM memory rather than being copied
into RAM.

Signed-off-by: Ariel D'Alessandro <ariel@vanguardiasur.com.ar>
---
 fs/Config.in      |  1 +
 fs/axfs/Config.in |  4 ++++
 fs/axfs/axfs.mk   | 13 +++++++++++++
 3 files changed, 18 insertions(+)
 create mode 100644 fs/axfs/Config.in
 create mode 100644 fs/axfs/axfs.mk

diff --git a/fs/Config.in b/fs/Config.in
index 5853113..51ccf28 100644
--- a/fs/Config.in
+++ b/fs/Config.in
@@ -1,5 +1,6 @@
 menu "Filesystem images"
 
+source "fs/axfs/Config.in"
 source "fs/cloop/Config.in"
 source "fs/cpio/Config.in"
 source "fs/cramfs/Config.in"
diff --git a/fs/axfs/Config.in b/fs/axfs/Config.in
new file mode 100644
index 0000000..7e25fe7
--- /dev/null
+++ b/fs/axfs/Config.in
@@ -0,0 +1,4 @@
+config BR2_TARGET_ROOTFS_AXFS
+	bool "axfs root filesystem"
+	help
+	  Build an axfs root filesystem
diff --git a/fs/axfs/axfs.mk b/fs/axfs/axfs.mk
new file mode 100644
index 0000000..05d6e5d
--- /dev/null
+++ b/fs/axfs/axfs.mk
@@ -0,0 +1,13 @@
+################################################################################
+#
+# Build the axfs root filesystem image
+#
+################################################################################
+
+ROOTFS_AXFS_DEPENDENCIES = host-axfsutils
+
+define ROOTFS_AXFS_CMD
+	$(HOST_DIR)/usr/bin/mkfs.axfs -s -a $(TARGET_DIR) $@
+endef
+
+$(eval $(call ROOTFS_TARGET,axfs))
-- 
1.9.1

[Buildroot] [PATCH v2 1/2] axfsutils: add new package

[Arnout Vandecappelle]

On 05-10-15 17:55, Ariel D'Alessandro wrote:
> Tools for building AXFS Filesystem.
> 
> The Advanced XIP File System is a Linux kernel filesystem driver that enables
> files to be executed directly from flash or ROM memory rather than being copied
> into RAM.

 Commit messages are normally wrapped at 72 columns.

> 
> Source:
> 	https://github.com/jaredeh/axfs
> 
> Signed-off-by: Ariel D'Alessandro <ariel@vanguardiasur.com.ar>
> ---
>  package/axfsutils/axfsutils.mk | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
>  create mode 100644 package/axfsutils/axfsutils.mk
> 
> diff --git a/package/axfsutils/axfsutils.mk b/package/axfsutils/axfsutils.mk
> new file mode 100644
> index 0000000..ce5b892
> --- /dev/null
> +++ b/package/axfsutils/axfsutils.mk
> @@ -0,0 +1,20 @@
> +################################################################################
> +#
> +# axfsutils
> +#
> +################################################################################
> +
> +AXFSUTILS_VERSION = f26ae785e33df76f658b71ef2cfbc7f511ff875d
> +AXFSUTILS_SITE = $(call github,jaredeh,axfs,$(AXFSUTILS_VERSION))
> +AXFSUTILS_LICENSE = GPLv2

 I verified that it's indeed v2 only.

> +AXFSUTILS_LICENSE_FILES = COPYING

 It's actually mkfs.axfs-legacy/COPYING.


 Looking at the source, it seems that you have to add host-zlib as a dependency.


 Regards,
 Arnout

> +
> +define HOST_AXFSUTILS_BUILD_CMDS
> +	$(HOST_MAKE_ENV) $(MAKE) -C $(@D)/mkfs.axfs-legacy

 It would be add to add an explanation why you use the legacy one: "The 'new'
mkfs.axfs requires GNUstep which is not a buildroot prerequisite, and the
'legacy' one works just as well."

 Note that comments should be put outside of the CMDS block.


 Regards,
 Arnout

> +endef
> +
> +define HOST_AXFSUTILS_INSTALL_CMDS
> +	cp $(@D)/mkfs.axfs-legacy/mkfs.axfs $(HOST_DIR)/usr/bin/
> +endef
> +
> +$(eval $(host-generic-package))
> 


-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF

[Buildroot] [PATCH v2 2/2] axfs: add new filesystem type

[Arnout Vandecappelle]

On 05-10-15 17:55, Ariel D'Alessandro wrote:
> The Advanced XIP File System is a Linux kernel filesystem driver that enables
> files to be executed directly from flash or ROM memory rather than being copied
> into RAM.
> 
> Signed-off-by: Ariel D'Alessandro <ariel@vanguardiasur.com.ar>
> ---
>  fs/Config.in      |  1 +
>  fs/axfs/Config.in |  4 ++++
>  fs/axfs/axfs.mk   | 13 +++++++++++++
>  3 files changed, 18 insertions(+)
>  create mode 100644 fs/axfs/Config.in
>  create mode 100644 fs/axfs/axfs.mk
> 
> diff --git a/fs/Config.in b/fs/Config.in
> index 5853113..51ccf28 100644
> --- a/fs/Config.in
> +++ b/fs/Config.in
> @@ -1,5 +1,6 @@
>  menu "Filesystem images"
>  
> +source "fs/axfs/Config.in"
>  source "fs/cloop/Config.in"
>  source "fs/cpio/Config.in"
>  source "fs/cramfs/Config.in"
> diff --git a/fs/axfs/Config.in b/fs/axfs/Config.in
> new file mode 100644
> index 0000000..7e25fe7
> --- /dev/null
> +++ b/fs/axfs/Config.in
> @@ -0,0 +1,4 @@
> +config BR2_TARGET_ROOTFS_AXFS
> +	bool "axfs root filesystem"
> +	help
> +	  Build an axfs root filesystem

 This needs a lot more explanation. For starters, repeat the explanation you put
in the commit message (but wrap at 72 columns!). And perhaps you should add that
all files will be XIPified (or whatever the verb is). Also, you should mention
that the kernel has to be built with the axfs patches to be able to read it.

 It would be nice to add the axfs kernel side as a kernel extension as well. But
that looks heavily non-trivial.


> diff --git a/fs/axfs/axfs.mk b/fs/axfs/axfs.mk
> new file mode 100644
> index 0000000..05d6e5d
> --- /dev/null
> +++ b/fs/axfs/axfs.mk
> @@ -0,0 +1,13 @@
> +################################################################################
> +#
> +# Build the axfs root filesystem image
> +#
> +################################################################################
> +
> +ROOTFS_AXFS_DEPENDENCIES = host-axfsutils
> +
> +define ROOTFS_AXFS_CMD
> +	$(HOST_DIR)/usr/bin/mkfs.axfs -s -a $(TARGET_DIR) $@

 I'm not sure if we really want to give the -s option. Is it very verbose?
Generally I like a bit of feedback about how the filesystem is built, and we do
get it for e.g. squashfs.


 But basically, the patch looks good to me. I'm a bit surprised it's so simple.

> +endef
> +
> +$(eval $(call ROOTFS_TARGET,axfs))

 Eek, do we still have that horrible construct for rootfs building... :-)

 Regards,
 Arnout


-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF

[Buildroot] [PATCH v2 2/2] axfs: add new filesystem type

[Ezequiel Garcia]

On 5 October 2015 at 15:53, Arnout Vandecappelle <arnout@mind.be> wrote:
> On 05-10-15 17:55, Ariel D'Alessandro wrote:
>> The Advanced XIP File System is a Linux kernel filesystem driver that enables
>> files to be executed directly from flash or ROM memory rather than being copied
>> into RAM.
>>
>> Signed-off-by: Ariel D'Alessandro <ariel@vanguardiasur.com.ar>
>> ---
>>  fs/Config.in      |  1 +
>>  fs/axfs/Config.in |  4 ++++
>>  fs/axfs/axfs.mk   | 13 +++++++++++++
>>  3 files changed, 18 insertions(+)
>>  create mode 100644 fs/axfs/Config.in
>>  create mode 100644 fs/axfs/axfs.mk
>>
>> diff --git a/fs/Config.in b/fs/Config.in
>> index 5853113..51ccf28 100644
>> --- a/fs/Config.in
>> +++ b/fs/Config.in
>> @@ -1,5 +1,6 @@
>>  menu "Filesystem images"
>>
>> +source "fs/axfs/Config.in"
>>  source "fs/cloop/Config.in"
>>  source "fs/cpio/Config.in"
>>  source "fs/cramfs/Config.in"
>> diff --git a/fs/axfs/Config.in b/fs/axfs/Config.in
>> new file mode 100644
>> index 0000000..7e25fe7
>> --- /dev/null
>> +++ b/fs/axfs/Config.in
>> @@ -0,0 +1,4 @@
>> +config BR2_TARGET_ROOTFS_AXFS
>> +     bool "axfs root filesystem"
>> +     help
>> +       Build an axfs root filesystem
>
>  This needs a lot more explanation. For starters, repeat the explanation you put
> in the commit message (but wrap at 72 columns!). And perhaps you should add that
> all files will be XIPified (or whatever the verb is). Also, you should mention
> that the kernel has to be built with the axfs patches to be able to read it.
>
>  It would be nice to add the axfs kernel side as a kernel extension as well. But
> that looks heavily non-trivial.
>

Should we clarify that the FS is not supported in Linux mainline?
-- 
Ezequiel Garc?a, VanguardiaSur
www.vanguardiasur.com.ar

[Buildroot] [PATCH v2 2/2] axfs: add new filesystem type

[Arnout Vandecappelle]

On 05-10-15 19:59, Ezequiel Garcia wrote:
> On 5 October 2015 at 15:53, Arnout Vandecappelle <arnout@mind.be> wrote:
>> On 05-10-15 17:55, Ariel D'Alessandro wrote:
>>> The Advanced XIP File System is a Linux kernel filesystem driver that enables
>>> files to be executed directly from flash or ROM memory rather than being copied
>>> into RAM.
>>>
>>> Signed-off-by: Ariel D'Alessandro <ariel@vanguardiasur.com.ar>
[snip]
>>> +config BR2_TARGET_ROOTFS_AXFS
>>> +     bool "axfs root filesystem"
>>> +     help
>>> +       Build an axfs root filesystem
>>
>>  This needs a lot more explanation. For starters, repeat the explanation you put
>> in the commit message (but wrap at 72 columns!). And perhaps you should add that
>> all files will be XIPified (or whatever the verb is). Also, you should mention
>> that the kernel has to be built with the axfs patches to be able to read it.
>>
>>  It would be nice to add the axfs kernel side as a kernel extension as well. But
>> that looks heavily non-trivial.
>>
> 
> Should we clarify that the FS is not supported in Linux mainline?

 That's what I mean with "the kernel has to be built with the axfs patches".


 Regards,
 Arnout

-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF

[Buildroot] [PATCH v2 1/2] axfsutils: add new package

[Ariel D'Alessandro]

Arnout,

Thanks for your response,

El 05/10/15 a las 15:39, Arnout Vandecappelle escribi?:
> On 05-10-15 17:55, Ariel D'Alessandro wrote:
>> Tools for building AXFS Filesystem.
>>
>> The Advanced XIP File System is a Linux kernel filesystem driver that enables
>> files to be executed directly from flash or ROM memory rather than being copied
>> into RAM.
> 
>  Commit messages are normally wrapped at 72 columns.

Right, will change that.

> 
>>
[snip]
>>
>> diff --git a/package/axfsutils/axfsutils.mk b/package/axfsutils/axfsutils.mk
>> new file mode 100644
>> index 0000000..ce5b892
>> --- /dev/null
>> +++ b/package/axfsutils/axfsutils.mk
>> @@ -0,0 +1,20 @@
>> +################################################################################
>> +#
>> +# axfsutils
>> +#
>> +################################################################################
>> +
>> +AXFSUTILS_VERSION = f26ae785e33df76f658b71ef2cfbc7f511ff875d
>> +AXFSUTILS_SITE = $(call github,jaredeh,axfs,$(AXFSUTILS_VERSION))
>> +AXFSUTILS_LICENSE = GPLv2
> 
>  I verified that it's indeed v2 only.
> 
>> +AXFSUTILS_LICENSE_FILES = COPYING
> 
>  It's actually mkfs.axfs-legacy/COPYING.

Woops, my bad! I'll fix that.

> 
> 
>  Looking at the source, it seems that you have to add host-zlib as a dependency.

I'll check this.

> 
>> +
>> +define HOST_AXFSUTILS_BUILD_CMDS
>> +	$(HOST_MAKE_ENV) $(MAKE) -C $(@D)/mkfs.axfs-legacy
> 
>  It would be add to add an explanation why you use the legacy one: "The 'new'
> mkfs.axfs requires GNUstep which is not a buildroot prerequisite, and the
> 'legacy' one works just as well."
> 
>  Note that comments should be put outside of the CMDS block.

OK. I'll add this and send a new patchset v3.

Thanks!

-- 
Ariel D'Alessandro, VanguardiaSur
www.vanguardiasur.com.ar

[Buildroot] [PATCH v2 2/2] axfs: add new filesystem type

[Ariel D'Alessandro]

Arnout,

El 05/10/15 a las 15:53, Arnout Vandecappelle escribi?:
> On 05-10-15 17:55, Ariel D'Alessandro wrote:
>> The Advanced XIP File System is a Linux kernel filesystem driver that enables
>> files to be executed directly from flash or ROM memory rather than being copied
>> into RAM.
>>
[snip]
>> diff --git a/fs/axfs/Config.in b/fs/axfs/Config.in
>> new file mode 100644
>> index 0000000..7e25fe7
>> --- /dev/null
>> +++ b/fs/axfs/Config.in
>> @@ -0,0 +1,4 @@
>> +config BR2_TARGET_ROOTFS_AXFS
>> +	bool "axfs root filesystem"
>> +	help
>> +	  Build an axfs root filesystem
> 
>  This needs a lot more explanation. For starters, repeat the explanation you put
> in the commit message (but wrap at 72 columns!). And perhaps you should add that
> all files will be XIPified (or whatever the verb is). Also, you should mention
> that the kernel has to be built with the axfs patches to be able to read it.

OK, I'll add some notes here.

> 
>  It would be nice to add the axfs kernel side as a kernel extension as well. But
> that looks heavily non-trivial.
> 
> 
>> diff --git a/fs/axfs/axfs.mk b/fs/axfs/axfs.mk
>> new file mode 100644
>> index 0000000..05d6e5d
>> --- /dev/null
>> +++ b/fs/axfs/axfs.mk
>> @@ -0,0 +1,13 @@
>> +################################################################################
>> +#
>> +# Build the axfs root filesystem image
>> +#
>> +################################################################################
>> +
>> +ROOTFS_AXFS_DEPENDENCIES = host-axfsutils
>> +
>> +define ROOTFS_AXFS_CMD
>> +	$(HOST_DIR)/usr/bin/mkfs.axfs -s -a $(TARGET_DIR) $@
> 
>  I'm not sure if we really want to give the -s option. Is it very verbose?
> Generally I like a bit of feedback about how the filesystem is built, and we do
> get it for e.g. squashfs.

Yeah, I think it's very verbose. But on the other hand, with the -s
option it's too quiet.
I don't know what is the main criteria. Maybe you can tell me, here's
the output of two mkfs.axfs executions with and without -s option:

--
$ ./mkfs.axfs -s -a target/ output/
number of files:                   585
number of 4KB nodes:               1752

Total image size:                       5111906
--

--
$ ./mkfs.axfs -a target/ output/
-54.49% (-728 bytes)	THIS_IS_NOT_YOUR_ROOT_FILESYSTEM
  0.00% (+0 bytes)	lib32
  0.00% (+0 bytes)	linuxrc
  0.00% (+0 bytes)	ash
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  0.00% (+0 bytes)	chgrp
  0.00% (+0 bytes)	chmod
  0.00% (+0 bytes)	chown
  0.00% (+0 bytes)	cp
  0.00% (+0 bytes)	cpio
  0.00% (+0 bytes)	date
  0.00% (+0 bytes)	dd
  0.00% (+0 bytes)	df
  0.00% (+0 bytes)	dmesg
  0.00% (+0 bytes)	dnsdomainname
  0.00% (+0 bytes)	dumpkmap
  0.00% (+0 bytes)	echo
  0.00% (+0 bytes)	egrep
  0.00% (+0 bytes)	false
  0.00% (+0 bytes)	fdflush
  0.00% (+0 bytes)	fgrep
  0.00% (+0 bytes)	getopt
  0.00% (+0 bytes)	grep
  0.00% (+0 bytes)	gunzip
  0.00% (+0 bytes)	gzip
  0.00% (+0 bytes)	hostname
  0.00% (+0 bytes)	kill
  0.00% (+0 bytes)	linux32
  0.00% (+0 bytes)	linux64
  0.00% (+0 bytes)	ln
  0.00% (+0 bytes)	login
  0.00% (+0 bytes)	ls
  0.00% (+0 bytes)	lsattr
  0.00% (+0 bytes)	mkdir
  0.00% (+0 bytes)	mknod
  0.00% (+0 bytes)	mktemp
  0.00% (+0 bytes)	more
  0.00% (+0 bytes)	mount
  0.00% (+0 bytes)	mountpoint
  0.00% (+0 bytes)	mt
  0.00% (+0 bytes)	mv
  0.00% (+0 bytes)	netstat
  0.00% (+0 bytes)	nice
  0.00% (+0 bytes)	pidof
  0.00% (+0 bytes)	ping
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  0.00% (+0 bytes)	ps
  0.00% (+0 bytes)	pwd
  0.00% (+0 bytes)	rm
  0.00% (+0 bytes)	rmdir
  0.00% (+0 bytes)	run-parts
  0.00% (+0 bytes)	sed
  0.00% (+0 bytes)	setarch
  0.00% (+0 bytes)	setserial
  0.00% (+0 bytes)	sh
  0.00% (+0 bytes)	sleep
  0.00% (+0 bytes)	stty
  0.00% (+0 bytes)	su
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  0.00% (+0 bytes)	tar
  0.00% (+0 bytes)	touch
  0.00% (+0 bytes)	true
  0.00% (+0 bytes)	umount
  0.00% (+0 bytes)	uname
  0.00% (+0 bytes)	usleep
  0.00% (+0 bytes)	vi
  0.00% (+0 bytes)	watch
  0.00% (+0 bytes)	zcat
  0.00% (+0 bytes)	log
-43.44% (-139 bytes)	fstab
-34.78% (-104 bytes)	group
 10.00% (+1 bytes)	hostname
  2.50% (+1 bytes)	hosts
-49.43% (-519 bytes)	inittab
-54.41% (-642 bytes)	inputrc
  4.76% (+1 bytes)	issue
  0.00% (+0 bytes)	mtab
-24.14% (-28 bytes)	os-release
-52.29% (-194 bytes)	passwd
-53.17% (-738 bytes)	profile
-48.54% (-1332 bytes)	protocols
  0.20% (+1 bytes)	random-seed
  0.00% (+0 bytes)	resolv.conf
-60.62% (-234 bytes)	securetty
-59.55% (-6475 bytes)	services
-65.27% (-156 bytes)	shadow
-53.95% (-348 bytes)	ts.conf
  0.00% (+0 bytes)	ld-uClibc-0.9.33.2.so
  0.00% (+0 bytes)	ld-uClibc.so.0
  0.00% (+0 bytes)	libatomic.so
  0.00% (+0 bytes)	libatomic.so.1
  0.00% (+0 bytes)	libatomic.so.1.0.0
  0.00% (+0 bytes)	libc.so.0
  0.00% (+0 bytes)	libcrypt-0.9.33.2.so
  0.00% (+0 bytes)	libcrypt.so.0
  0.00% (+0 bytes)	libdl-0.9.33.2.so
  0.00% (+0 bytes)	libdl.so.0
-12.12% (-16 bytes)	libgcc_s.so
-62.18% (-76236 bytes)	libgcc_s.so.1
  0.00% (+0 bytes)	libm-0.9.33.2.so
  0.00% (+0 bytes)	libm.so.0
  0.00% (+0 bytes)	libnsl-0.9.33.2.so
  0.00% (+0 bytes)	libnsl.so.0
  0.00% (+0 bytes)	libpthread-0.9.33.2.so
  0.00% (+0 bytes)	libpthread.so.0
  0.00% (+0 bytes)	libresolv-0.9.33.2.so
  0.00% (+0 bytes)	libresolv.so.0
  0.00% (+0 bytes)	librt-0.9.33.2.so
  0.00% (+0 bytes)	librt.so.0
  0.00% (+0 bytes)	libuClibc-0.9.33.2.so
  0.00% (+0 bytes)	libutil-0.9.33.2.so
  0.00% (+0 bytes)	libutil.so.0
-18.86% (-33 bytes)	.bash_logout
 -6.41% (-5 bytes)	.bash_profile
-34.99% (-162 bytes)	.profile
  0.00% (+0 bytes)	arp
  0.00% (+0 bytes)	blkid
  0.00% (+0 bytes)	devmem
  0.00% (+0 bytes)	fdisk
  0.00% (+0 bytes)	freeramdisk
  0.00% (+0 bytes)	fsck
  0.00% (+0 bytes)	fstrim
  0.00% (+0 bytes)	getty
  0.00% (+0 bytes)	halt
  0.00% (+0 bytes)	hdparm
  0.00% (+0 bytes)	hwclock
  0.00% (+0 bytes)	ifconfig
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 -1.09% (-1 bytes)	GoogleNyan.conf
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number of files:                   585
number of 4KB nodes:               1752

offset to node_type bytetable:          984
offset to node_index bytetable:	        2739
offset to cnode_offset bytetable:       9759
offset to cnode_index bytetable:        11463
offset to banode_offset bytetable:      13167
offset to cblock_offset bytetable:      14991
offset to inode_file_size bytetable:    16695
offset to inode_name_offset bytetable:  19035
offset to inode_num_entries bytetable:  21375
offset to inode_mode_index bytetable:   23715
offset to inode_array_index bytetable:  26055
offset to modes bytetable:              28395
offset to uids bytetable:               28443
offset to gids bytetable:               28491
offset to zero padding:                 28539
offset to xip data:                     28672
offset to byte_aligned data:            3600384
offset to compressed data:              4150720
offset to strings data:                 5106657
offset to zero padding:                 5111902

Total image size:                       5111906
--

> 
> 
>  But basically, the patch looks good to me. I'm a bit surprised it's so simple.

Cool, thanks again for your response.

-- 
Ariel D'Alessandro, VanguardiaSur
www.vanguardiasur.com.ar

[Buildroot] [PATCH v2 2/2] axfs: add new filesystem type

[Yann E. MORIN]

Ariel, All,

On 2015-10-13 09:12 -0300, Ariel D'Alessandro spake thusly:
> El 05/10/15 a las 15:53, Arnout Vandecappelle escribi?:
[--SNIP--]
> >> +define ROOTFS_AXFS_CMD
> >> +	$(HOST_DIR)/usr/bin/mkfs.axfs -s -a $(TARGET_DIR) $@
> > 
> >  I'm not sure if we really want to give the -s option. Is it very verbose?
> > Generally I like a bit of feedback about how the filesystem is built, and we do
> > get it for e.g. squashfs.
> 
> Yeah, I think it's very verbose. But on the other hand, with the -s
> option it's too quiet.
> I don't know what is the main criteria. Maybe you can tell me, here's
> the output of two mkfs.axfs executions with and without -s option:
> 
> --
> $ ./mkfs.axfs -s -a target/ output/
> number of files:                   585
> number of 4KB nodes:               1752
> 
> Total image size:                       5111906
> --
> 
> --
> $ ./mkfs.axfs -a target/ output/
[--SNIP--]
> Total image size:                       5111906

IMHO, the non-silent version is way too verbose. I'd prefer that the -s
flag be used.

Arnout, OK for you?

Regards,
Yann E. MORIN.

-- 
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 223 225 172 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
'------------------------------^-------^------------------^--------------------'

[Buildroot] [PATCH v2 2/2] axfs: add new filesystem type

[Yann E. MORIN]

Arnout, Ariel, All,

On 2015-10-05 19:53 +0100, Arnout Vandecappelle spake thusly:
> On 05-10-15 17:55, Ariel D'Alessandro wrote:
> > The Advanced XIP File System is a Linux kernel filesystem driver that enables
> > files to be executed directly from flash or ROM memory rather than being copied
> > into RAM.
[--SNIP--]
>  It would be nice to add the axfs kernel side as a kernel extension as well. But
> that looks heavily non-trivial.

I had a quick and cursory look at the axfs sources, and I think this
could be quite easily achievable. Non-trivial, granted, but not too
complex either.

Ariel, are you interested in adding this as a kernel extension?
(Hint: it would be really great! ;-) )

Kernel extensions are a way to "modify" the kernel source tree with
patches provided by another package:
    http://buildroot.org/downloads/manual/manual.html#linux-kernel-ext

Basically, here's what you'd have to do in the axfs extension:

  - get the 'raw' version of the kernel with (but see notes below):
        AXFSUTILS_KVER = $(MAKE) -C $(LINUX_DIR) kernelversion

  - check that there is a patch directory for that kernel version:
        kernel/patches/v$(AXFSUTILS_KVER)/
    => if not, bail out
    => if yes, continue

  - copy $(@D)/kernel/fs/axfs to $(LINUX_DIR)/fs/axfs

  - copy $(@D)/include/linux/* to $(LINUX_DIR)/include/linux/

  - modify $(LINUX_DIR)/fs/Kconfig with (before last line):
        source "fs/axfs/Kconfig"

  - modify $(LINUX_DIR)/fs/Makefile with (as last line):
        obj-$(CONFIG_AXFS) += axfs

Obviously, entirely untested; adapt to Real Life (TM). ;-)

Notes: ideally, the kernel 'raw' version should be provided by
linux/linux.mk but we currently do not have it yet; we only have
'kernelrelease', not 'kernelversion'. It would be interesting if you
provided an initial patch that adds this.

Currently, 'kernelrelease' is in $(LINUX_VERSION_PROBED), so maybe you
could introduce LINUX_VERSION_RAW filled with the output of
'kernelversion' (see how it's done for 'kernelrelease').

Regards,
Yann E. MORIN.

-- 
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 223 225 172 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
'------------------------------^-------^------------------^--------------------'

[Buildroot] [PATCH v2 2/2] axfs: add new filesystem type

[Arnout Vandecappelle]

On 13-10-15 22:24, Yann E. MORIN wrote:
> Ariel, All,
> 
> On 2015-10-13 09:12 -0300, Ariel D'Alessandro spake thusly:
>> El 05/10/15 a las 15:53, Arnout Vandecappelle escribi?:
> [--SNIP--]
>>>> +define ROOTFS_AXFS_CMD
>>>> +	$(HOST_DIR)/usr/bin/mkfs.axfs -s -a $(TARGET_DIR) $@
>>>
>>>  I'm not sure if we really want to give the -s option. Is it very verbose?
>>> Generally I like a bit of feedback about how the filesystem is built, and we do
>>> get it for e.g. squashfs.
>>
>> Yeah, I think it's very verbose. But on the other hand, with the -s
>> option it's too quiet.
>> I don't know what is the main criteria. Maybe you can tell me, here's
>> the output of two mkfs.axfs executions with and without -s option:
>>
>> --
>> $ ./mkfs.axfs -s -a target/ output/
>> number of files:                   585
>> number of 4KB nodes:               1752
>>
>> Total image size:                       5111906
>> --
>>
>> --
>> $ ./mkfs.axfs -a target/ output/
> [--SNIP--]
>> Total image size:                       5111906
> 
> IMHO, the non-silent version is way too verbose. I'd prefer that the -s
> flag be used.
> 
> Arnout, OK for you?

 I believe mksquashfs is equally verbose. But it's OK for me either way.

 Regards,
 Arnout

-- 
Arnout Vandecappelle      arnout dot vandecappelle at essensium dot com
Senior Embedded Software Architect . . . . . . +32-478-010353 (mobile)
Essensium, Mind division . . . . . . . . . . . . . . http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium . . . . . BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF

[Buildroot] [PATCH v2 0/2] Add support for AXFS filesystem type

[Thomas Petazzoni]

Dear Ariel D'Alessandro,

On Mon,  5 Oct 2015 13:55:00 -0300, Ariel D'Alessandro wrote:
> This patch series adds support for using the AXFS filesystem type.
> 
> The Advanced XIP File System is a Linux kernel filesystem driver that enables
> files to be executed directly from flash or ROM memory rather than being copied
> into RAM.
> 
> More info can be found here: http://elinux.org/AXFS
> 
> Changes from v1:
> * Removed unnecessary call to $(generic-package) in axfsutils.mk.
> 
> Ariel
> 
> Ariel D'Alessandro (2):
>   axfsutils: add new package
>   axfs: add new filesystem type

You received some feedback on both patches. Could you address this
feedback, and submit a new version of the patches?

Note that adding the axfs patches as a kernel extension, as suggested
by Yann E. Morin, is optional and can perfectly be done as a set of
follow-up patches: it is not mandatory to have this part of the current
series.

However, one thing that I remember about AXFS is that you could decide
when creating the root filesystem, which parts of which files would be
stored uncompressed (so that they can be XIP-ed) and which parts of
which files would be stored compressed (to save space). This allowed to
combine the nice aspects of a XIP-capable filesystem, with the nice
aspects of a compressed filesystem. I remember there was even a tool to
run on the target to "measure" the filesystem accesses, and give some
hints on which pages of data should be stored uncompressed vs. which
pages should be stored compressed. Is this actually implemented in
AXFS ? If so, do you plan to add support for such functionality ?

In any case, I'll mark your patches as "Changes Requested" in
patchwork, so please resubmit a new version when you have time,
otherwise we'll forget about your contribution.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

[Buildroot] [PATCH v2 2/2] axfs: add new filesystem type

[Ariel D'Alessandro]

Yann,

El 13/10/15 a las 17:53, Yann E. MORIN escribi?:
> Arnout, Ariel, All,
> 
> On 2015-10-05 19:53 +0100, Arnout Vandecappelle spake thusly:
>> On 05-10-15 17:55, Ariel D'Alessandro wrote:
>>> The Advanced XIP File System is a Linux kernel filesystem driver that enables
>>> files to be executed directly from flash or ROM memory rather than being copied
>>> into RAM.
> [--SNIP--]
>>  It would be nice to add the axfs kernel side as a kernel extension as well. But
>> that looks heavily non-trivial.
> 
> I had a quick and cursory look at the axfs sources, and I think this
> could be quite easily achievable. Non-trivial, granted, but not too
> complex either.
> 
> Ariel, are you interested in adding this as a kernel extension?
> (Hint: it would be really great! ;-) )

Yes, I'll make some room and take a look at this!

> 
> Kernel extensions are a way to "modify" the kernel source tree with
> patches provided by another package:
>     http://buildroot.org/downloads/manual/manual.html#linux-kernel-ext
> 
> Basically, here's what you'd have to do in the axfs extension:
> 
>   - get the 'raw' version of the kernel with (but see notes below):
>         AXFSUTILS_KVER = $(MAKE) -C $(LINUX_DIR) kernelversion
> 
>   - check that there is a patch directory for that kernel version:
>         kernel/patches/v$(AXFSUTILS_KVER)/
>     => if not, bail out
>     => if yes, continue
> 
>   - copy $(@D)/kernel/fs/axfs to $(LINUX_DIR)/fs/axfs
> 
>   - copy $(@D)/include/linux/* to $(LINUX_DIR)/include/linux/
> 
>   - modify $(LINUX_DIR)/fs/Kconfig with (before last line):
>         source "fs/axfs/Kconfig"
> 
>   - modify $(LINUX_DIR)/fs/Makefile with (as last line):
>         obj-$(CONFIG_AXFS) += axfs
> 
> Obviously, entirely untested; adapt to Real Life (TM). ;-)
> 
> Notes: ideally, the kernel 'raw' version should be provided by
> linux/linux.mk but we currently do not have it yet; we only have
> 'kernelrelease', not 'kernelversion'. It would be interesting if you
> provided an initial patch that adds this.
> 
> Currently, 'kernelrelease' is in $(LINUX_VERSION_PROBED), so maybe you
> could introduce LINUX_VERSION_RAW filled with the output of
> 'kernelversion' (see how it's done for 'kernelrelease').

That's pretty clarifying! Thank you very much for this Yann, it will
help me a lot. I'll try to submit patches for this ASAP.

Thanks,

-- 
Ariel D'Alessandro, VanguardiaSur
www.vanguardiasur.com.ar

[Buildroot] [PATCH v2 0/2] Add support for AXFS filesystem type

[Ariel D'Alessandro]

Thomas,

El 13/10/15 a las 18:14, Thomas Petazzoni escribi?:
> Dear Ariel D'Alessandro,
> 
> On Mon,  5 Oct 2015 13:55:00 -0300, Ariel D'Alessandro wrote:
>> This patch series adds support for using the AXFS filesystem type.
>>
>> The Advanced XIP File System is a Linux kernel filesystem driver that enables
>> files to be executed directly from flash or ROM memory rather than being copied
>> into RAM.
>>
>> More info can be found here: http://elinux.org/AXFS
>>
>> Changes from v1:
>> * Removed unnecessary call to $(generic-package) in axfsutils.mk.
>>
>> Ariel
>>
>> Ariel D'Alessandro (2):
>>   axfsutils: add new package
>>   axfs: add new filesystem type
> 
> You received some feedback on both patches. Could you address this
> feedback, and submit a new version of the patches?

Yes, right away.

> 
> Note that adding the axfs patches as a kernel extension, as suggested
> by Yann E. Morin, is optional and can perfectly be done as a set of
> follow-up patches: it is not mandatory to have this part of the current
> series.

Understood.

> 
> However, one thing that I remember about AXFS is that you could decide
> when creating the root filesystem, which parts of which files would be
> stored uncompressed (so that they can be XIP-ed) and which parts of
> which files would be stored compressed (to save space). This allowed to
> combine the nice aspects of a XIP-capable filesystem, with the nice
> aspects of a compressed filesystem. 

Yes, indeed. One of the keys of AXFS is that it "has the ability to
store individual *pages* in a file uncompressed/XIP or compressed/Demand
Paged." [0]

Moreover, "mkfs.axfs tool can receive an additional argument using the
-i flag which points to a user-created file in the XML format; it
indicates which pages the user desires to have marked for XIP within the
file system image." [1]

> I remember there was even a tool to
> run on the target to "measure" the filesystem accesses, and give some
> hints on which pages of data should be stored uncompressed vs. which
> pages should be stored compressed. Is this actually implemented in
> AXFS ? 

Yes. The CONFIG_AXFS_PROFILING option is added in order to enable the
profiling tool. Then simply running on the target platform, the AXFS
profiler will collect data and write the information it could gather to
/proc/axfs/volume0. See [1] for more information.

> If so, do you plan to add support for such functionality ?

Yes, it would be nice to add support for this functionality in order to
explode the entire AXFS capability. I'll do this as a set of follow-up
patches if that's OK, and let the -a flag (XIP all) for now.

Thanks,


Links:

[0]
http://www.academypublisher.com/ojs/index.php/jcp/article/viewFile/03017989/370

[1]
http://docslide.us/documents/application-execute-in-place-xip-with-linux-and-axfs.html

-- 
Ariel D'Alessandro, VanguardiaSur
www.vanguardiasur.com.ar

[Buildroot] [PATCH v2 0/2] Add support for AXFS filesystem type

[Thomas Petazzoni]

Hello,

On Wed, 14 Oct 2015 13:05:46 -0300, Ariel D'Alessandro wrote:

> > You received some feedback on both patches. Could you address this
> > feedback, and submit a new version of the patches?
> 
> Yes, right away.

Excellent, thanks!

> Moreover, "mkfs.axfs tool can receive an additional argument using the
> -i flag which points to a user-created file in the XML format; it
> indicates which pages the user desires to have marked for XIP within the
> file system image." [1]

So probably a Config.in option to specify the path to this file should
be added.

> > I remember there was even a tool to
> > run on the target to "measure" the filesystem accesses, and give some
> > hints on which pages of data should be stored uncompressed vs. which
> > pages should be stored compressed. Is this actually implemented in
> > AXFS ? 
> 
> Yes. The CONFIG_AXFS_PROFILING option is added in order to enable the
> profiling tool. Then simply running on the target platform, the AXFS
> profiler will collect data and write the information it could gather to
> /proc/axfs/volume0. See [1] for more information.

Good. This sort of into can be added in the help text of the Config.in
option.

> > If so, do you plan to add support for such functionality ?
> 
> Yes, it would be nice to add support for this functionality in order to
> explode the entire AXFS capability. I'll do this as a set of follow-up
> patches if that's OK, and let the -a flag (XIP all) for now.

Sounds like a very good plan.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com