From: Eric Biggers <ebiggers@kernel.org>
To: "Theodore Y. Ts'o" <tytso@mit.edu>
Cc: linux-fscrypt@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
Jaegeuk Kim <jaegeuk@kernel.org>,
Daniel Rosenberg <drosen@google.com>
Subject: Re: [PATCH 3/4] fscrypt: support test_dummy_encryption=v2
Date: Mon, 18 May 2020 20:02:05 -0700 [thread overview]
Message-ID: <20200519030205.GB954@sol.localdomain> (raw)
In-Reply-To: <20200519025355.GC2396055@mit.edu>
On Mon, May 18, 2020 at 10:53:55PM -0400, Theodore Y. Ts'o wrote:
> On Tue, May 12, 2020 at 04:32:50PM -0700, Eric Biggers wrote:
> > From: Eric Biggers <ebiggers@google.com>
> >
> > v1 encryption policies are deprecated in favor of v2, and some new
> > features (e.g. encryption+casefolding) are only being added for v2.
> >
> > Therefore, the "test_dummy_encryption" mount option (which is used for
> > encryption I/O testing with xfstests) needs to support v2 policies.
> >
> > To do this, extend its syntax to be "test_dummy_encryption=v1" or
> > "test_dummy_encryption=v2". The existing "test_dummy_encryption" (no
> > argument) also continues to be accepted, to specify the default setting
> > -- currently v1, but the next patch changes it to v2.
> >
> > To cleanly support both v1 and v2 while also making it easy to support
> > specifying other encryption settings in the future (say, accepting
> > "$contents_mode:$filenames_mode:v2"), make ext4 and f2fs maintain a
> > pointer to the dummy fscrypt_context rather than using mount flags.
> >
> > To avoid concurrency issues, don't allow test_dummy_encryption to be set
> > or changed during a remount. (The former restriction is new, but
> > xfstests doesn't run into it, so no one should notice.)
> >
> > Tested with 'gce-xfstests -c {ext4,f2fs}/encrypt -g auto'. On ext4,
> > there are two regressions, both of which are test bugs: ext4/023 and
> > ext4/028 fail because they set an xattr and expect it to be stored
> > inline, but the increase in size of the fscrypt_context from
> > 24 to 40 bytes causes this xattr to be spilled into an external block.
> >
> > Signed-off-by: Eric Biggers <ebiggers@google.com>
>
> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
>
> Looks good, but could you do me a favor and merge in this?
>
> diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c
> index 04bfaf63752c..6c9fc9e21c13 100644
> --- a/fs/ext4/sysfs.c
> +++ b/fs/ext4/sysfs.c
> @@ -293,6 +293,7 @@ EXT4_ATTR_FEATURE(batched_discard);
> EXT4_ATTR_FEATURE(meta_bg_resize);
> #ifdef CONFIG_FS_ENCRYPTION
> EXT4_ATTR_FEATURE(encryption);
> +EXT4_ATTR_FEATURE(test_dummy_encryption_v2);
> #endif
> #ifdef CONFIG_UNICODE
> EXT4_ATTR_FEATURE(casefold);
> @@ -308,6 +309,7 @@ static struct attribute *ext4_feat_attrs[] = {
> ATTR_LIST(meta_bg_resize),
> #ifdef CONFIG_FS_ENCRYPTION
> ATTR_LIST(encryption),
> + ATTR_LIST(test_dummy_encryption_v2),
> #endif
> #ifdef CONFIG_UNICODE
> ATTR_LIST(casefold),
>
> This will make it easier to have the gce-xfstests test runner know
> whether or not test_dummy_encryption=v1 / test_dummy_encryption=v2
> will work, and whether test_dummy_encryption tests v1 or v2.
>
Thanks, I'll add that. I assume you meant "Reviewed-by"?
- Eric
next prev parent reply other threads:[~2020-05-19 3:02 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-12 23:32 [PATCH 0/4] fscrypt: make '-o test_dummy_encryption' support v2 policies Eric Biggers
2020-05-12 23:32 ` [PATCH 1/4] linux/parser.h: add include guards Eric Biggers
2020-05-13 0:53 ` Theodore Y. Ts'o
2020-05-13 3:06 ` Jaegeuk Kim
2020-05-12 23:32 ` [PATCH 2/4] fscrypt: add fscrypt_add_test_dummy_key() Eric Biggers
2020-05-13 0:55 ` Theodore Y. Ts'o
2020-05-13 3:07 ` Jaegeuk Kim
2020-05-12 23:32 ` [PATCH 3/4] fscrypt: support test_dummy_encryption=v2 Eric Biggers
2020-05-13 3:11 ` Jaegeuk Kim
2020-05-19 2:53 ` Theodore Y. Ts'o
2020-05-19 3:02 ` Eric Biggers [this message]
2020-05-19 3:11 ` Eric Biggers
2020-05-19 3:19 ` Jaegeuk Kim
2020-05-19 14:02 ` Theodore Y. Ts'o
2020-05-12 23:32 ` [PATCH 4/4] fscrypt: make test_dummy_encryption use v2 by default Eric Biggers
2020-05-13 3:12 ` Jaegeuk Kim
2020-05-19 2:55 ` Theodore Y. Ts'o
2020-05-20 22:55 ` [PATCH 0/4] fscrypt: make '-o test_dummy_encryption' support v2 policies Eric Biggers
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=20200519030205.GB954@sol.localdomain \
--to=ebiggers@kernel.org \
--cc=drosen@google.com \
--cc=jaegeuk@kernel.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-f2fs-devel@lists.sourceforge.net \
--cc=linux-fscrypt@vger.kernel.org \
--cc=tytso@mit.edu \
/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).