From: Jaegeuk Kim <jaegeuk@kernel.org>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Daniel Rosenberg <drosen@google.com>, Chao Yu <chao@kernel.org>,
linux-f2fs-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Gabriel Krisman Bertazi <krisman@collabora.com>,
kernel-team@android.com, stable@vger.kernel.org
Subject: Re: [PATCH v2 2/2] f2fs: Advertise encrypted casefolding in sysfs
Date: Thu, 3 Jun 2021 10:53:26 -0700 [thread overview]
Message-ID: <YLkXFu4ep8tP3jsh@google.com> (raw)
In-Reply-To: <YLkQtDZFG1xKoqE5@kroah.com>
On 06/03, Greg KH wrote:
> On Thu, Jun 03, 2021 at 08:40:24AM -0700, Jaegeuk Kim wrote:
> > On 06/03, Greg KH wrote:
> > > On Thu, Jun 03, 2021 at 09:50:38AM +0000, Daniel Rosenberg wrote:
> > > > Older kernels don't support encryption with casefolding. This adds
> > > > the sysfs entry encrypted_casefold to show support for those combined
> > > > features. Support for this feature was originally added by
> > > > commit 7ad08a58bf67 ("f2fs: Handle casefolding with Encryption")
> > > >
> > > > Fixes: 7ad08a58bf67 ("f2fs: Handle casefolding with Encryption")
> > > > Cc: stable@vger.kernel.org # v5.11+
> > > > Signed-off-by: Daniel Rosenberg <drosen@google.com>
> > > > ---
> > > > fs/f2fs/sysfs.c | 15 +++++++++++++--
> > > > 1 file changed, 13 insertions(+), 2 deletions(-)
> > > >
> > > > diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
> > > > index 09e3f258eb52..6604291a3cdf 100644
> > > > --- a/fs/f2fs/sysfs.c
> > > > +++ b/fs/f2fs/sysfs.c
> > > > @@ -161,6 +161,9 @@ static ssize_t features_show(struct f2fs_attr *a,
> > > > if (f2fs_sb_has_compression(sbi))
> > > > len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
> > > > len ? ", " : "", "compression");
> > > > + if (f2fs_sb_has_casefold(sbi) && f2fs_sb_has_encrypt(sbi))
> > > > + len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
> > > > + len ? ", " : "", "encrypted_casefold");
> > > > len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
> > > > len ? ", " : "", "pin_file");
> > > > len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
> > >
> > > This is a HUGE abuse of sysfs and should not be encouraged and added to.
> >
> > This feature entry was originally added in 2017. Let me try to clean this up
> > after merging this.
>
> Thank you.
>
> > > Please make these "one value per file" and do not keep growing a single
> > > file that has to be parsed otherwise you will break userspace tools.
> > >
> > > And I don't see a Documentation/ABI/ entry for this either :(
> >
> > There is in Documentation/ABI/testing/sysfs-fs-f2fs.
>
> So this new item was documented in the file before the kernel change was
> made?
Do we need to describe all the strings in this entry?
203 What: /sys/fs/f2fs/<disk>/features
204 Date: July 2017
205 Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
206 Description: Shows all enabled features in current device.
>
> greg k-h
next prev parent reply other threads:[~2021-06-03 17:54 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-03 9:50 [PATCH v2 0/2] Fix up casefolding sysfs entries for F2FS Daniel Rosenberg
2021-06-03 9:50 ` [PATCH v2 1/2] f2fs: Show casefolding support only when supported Daniel Rosenberg
2021-06-03 18:20 ` Eric Biggers
2021-06-04 23:46 ` Chao Yu
2021-06-03 9:50 ` [PATCH v2 2/2] f2fs: Advertise encrypted casefolding in sysfs Daniel Rosenberg
2021-06-03 10:04 ` Greg KH
2021-06-03 15:40 ` Jaegeuk Kim
2021-06-03 17:26 ` Greg KH
2021-06-03 17:53 ` Jaegeuk Kim [this message]
2021-06-03 18:12 ` Greg KH
2021-06-03 19:20 ` Jaegeuk Kim
2021-06-03 20:54 ` David Laight
2021-06-03 18:26 ` Eric Biggers
2021-06-03 23:21 ` Eric Biggers
2021-06-04 4:45 ` Jaegeuk Kim
2021-06-04 5:01 ` Eric Biggers
2021-06-04 5:38 ` Jaegeuk Kim
2021-06-04 5:54 ` Daniel Rosenberg
2021-06-04 18:58 ` Theodore Ts'o
2021-06-05 0:11 ` Chao Yu
2021-06-05 0:15 ` Jaegeuk Kim
2021-06-04 8:27 ` David Laight
2021-06-04 8:33 ` Greg KH
2021-06-04 23:46 ` Chao Yu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YLkXFu4ep8tP3jsh@google.com \
--to=jaegeuk@kernel.org \
--cc=chao@kernel.org \
--cc=drosen@google.com \
--cc=gregkh@linuxfoundation.org \
--cc=kernel-team@android.com \
--cc=krisman@collabora.com \
--cc=linux-f2fs-devel@lists.sourceforge.net \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).