ext4 crypto: simplify and speed up filename encryption
authorTheodore Ts'o <tytso@mit.edu>
Fri, 1 May 2015 20:56:45 +0000 (16:56 -0400)
committerTheodore Ts'o <tytso@mit.edu>
Fri, 1 May 2015 20:56:45 +0000 (16:56 -0400)
Avoid using SHA-1 when calculating the user-visible filename when the
encryption key is available, and avoid decrypting lots of filenames
when searching for a directory entry in a directory block.

Change-Id: If4655f144784978ba0305b597bfa1c8d7bb69e63
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

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