linux/fs/f2fs
Jaegeuk Kim b5a7aef1ef fscrypto/f2fs: allow fs-specific key prefix for fs encryption
This patch allows fscrypto to handle a second key prefix given by filesystem.
The main reason is to provide backward compatibility, since previously f2fs
used "f2fs:" as a crypto prefix instead of "fscrypt:".
Later, ext4 should also provide key_prefix() to give "ext4:".

One concern decribed by Ted would be kinda double check overhead of prefixes.
In x86, for example, validate_user_key consumes 8 ms after boot-up, which turns
out derive_key_aes() consumed most of the time to load specific crypto module.
After such the cold miss, it shows almost zero latencies, which treats as a
negligible overhead.
Note that request_key() detects wrong prefix in prior to derive_key_aes() even.

Cc: Ted Tso <tytso@mit.edu>
Cc: stable@vger.kernel.org # v4.6
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07 10:32:33 -07:00
..
acl.c f2fs: introduce f2fs_kmalloc to wrap kmalloc 2016-05-07 10:32:20 -07:00
acl.h f2fs: avoid deadlock on init_inode_metadata 2014-11-03 16:07:33 -08:00
checkpoint.c f2fs: fix leak of orphan inode objects 2016-05-07 10:32:25 -07:00
data.c f2fs: fix incorrect mapping in ->bmap 2016-05-07 10:32:32 -07:00
debug.c f2fs: show current mount status 2016-04-15 08:49:47 -07:00
dir.c f2fs: revisit error handling flows 2016-05-07 10:32:25 -07:00
extent_cache.c f2fs: reuse get_extent_info 2016-05-07 10:32:29 -07:00
f2fs.h fscrypto/f2fs: allow fs-specific key prefix for fs encryption 2016-05-07 10:32:33 -07:00
file.c f2fs: avoid panic when truncating to max filesize 2016-05-07 10:32:33 -07:00
gc.c f2fs: introduce f2fs_kmalloc to wrap kmalloc 2016-05-07 10:32:20 -07:00
gc.h f2fs: detect idle time depending on user behavior 2016-01-11 15:56:37 -08:00
hash.c f2fs: introduce dot and dotdot name check 2015-05-28 15:41:34 -07:00
inline.c f2fs: use f2fs_grab_cache_page instead of grab_cache_page 2016-05-07 10:32:21 -07:00
inode.c f2fs: don't worry about inode leak in evict_inode 2016-05-07 10:32:30 -07:00
Kconfig f2fs: add mount option to select fault injection ratio 2016-05-07 10:32:22 -07:00
Makefile fs crypto: move per-file encryption from f2fs tree to fs/crypto 2016-03-17 21:19:33 -07:00
namei.c Merge tag 'f2fs-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs 2016-04-04 13:00:39 -07:00
node.c f2fs: remove an obsolete variable 2016-05-07 10:32:31 -07:00
node.h f2fs: use wait_for_stable_page to avoid contention 2016-02-22 16:07:23 -08:00
recovery.c f2fs: remove unneeded readahead in find_fsync_dnodes 2016-05-07 10:32:27 -07:00
segment.c f2fs: fix to clear page private flag 2016-05-03 11:20:06 -07:00
segment.h f2fs: shrink size of struct seg_entry 2016-05-07 10:32:29 -07:00
shrinker.c f2fs: speed up shrinking extent tree entries 2015-12-30 10:13:00 -08:00
super.c fscrypto/f2fs: allow fs-specific key prefix for fs encryption 2016-05-07 10:32:33 -07:00
trace.c f2fs: trace old block address for CoWed page 2016-02-22 21:40:02 -08:00
trace.h f2fs: add sbi and page pointer in f2fs_io_info 2015-05-28 15:41:32 -07:00
xattr.c f2fs: remove unneeded memset when updating xattr 2016-05-07 10:32:28 -07:00
xattr.h f2fs: add missing argument to f2fs_setxattr stub 2016-03-17 21:19:47 -07:00