lkml.org 
[lkml]   [2021]   [Jan]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [f2fs-dev] [PATCH AUTOSEL 5.10 10/31] f2fs: Handle casefolding with Encryption
On Wed, Dec 30, 2020 at 10:01:56AM -0800, Eric Biggers wrote:
>On Wed, Dec 30, 2020 at 08:02:52AM -0500, Sasha Levin wrote:
>> From: Daniel Rosenberg <drosen@google.com>
>>
>> [ Upstream commit 7ad08a58bf67594057362e45cbddd3e27e53e557 ]
>>
>> Expand f2fs's casefolding support to include encrypted directories. To
>> index casefolded+encrypted directories, we use the SipHash of the
>> casefolded name, keyed by a key derived from the directory's fscrypt
>> master key. This ensures that the dirhash doesn't leak information
>> about the plaintext filenames.
>>
>> Encryption keys are unavailable during roll-forward recovery, so we
>> can't compute the dirhash when recovering a new dentry in an encrypted +
>> casefolded directory. To avoid having to force a checkpoint when a new
>> file is fsync'ed, store the dirhash on-disk appended to i_name.
>>
>> This patch incorporates work by Eric Biggers <ebiggers@google.com>
>> and Jaegeuk Kim <jaegeuk@kernel.org>.
>>
>> Co-developed-by: Eric Biggers <ebiggers@google.com>
>> Signed-off-by: Eric Biggers <ebiggers@google.com>
>> Signed-off-by: Daniel Rosenberg <drosen@google.com>
>> Reviewed-by: Eric Biggers <ebiggers@google.com>
>> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
>> Signed-off-by: Sasha Levin <sashal@kernel.org>
>
>Please don't backport this to the LTS kernels. This is a new feature, not a
>fix, and you missed prerequisite patches...

Sure, I'l drop it. Thanks!

--
Thanks,
Sasha

\
 
 \ /
  Last update: 2021-01-04 15:23    [W:0.059 / U:0.640 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site