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
..
crypto.c	ext4/fscrypto: avoid RCU lookup in d_revalidate	2016-04-12 20:01:35 -07:00
fname.c	Merge tag 'for-f2fs-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs	2016-03-21 11:03:02 -07:00
Kconfig
keyinfo.c	fscrypto/f2fs: allow fs-specific key prefix for fs encryption	2016-05-07 10:32:33 -07:00
Makefile
policy.c