lkml.org 
[lkml]   [2020]   [Nov]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v3 3/3] f2fs: Handle casefolding with Encryption
On Wed, Nov 18, 2020 at 06:42:45AM +0000, Daniel Rosenberg wrote:
> 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>

Looks good. If it's needed (some may claim it's not needed because I have a
Co-developed-by), you can add:

Reviewed-by: Eric Biggers <ebiggers@google.com>

- Eric

\
 
 \ /
  Last update: 2020-11-18 20:08    [W:0.063 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site