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| author | Trevor Highland <trevor.highland@gmail.com> | 2008-02-06 01:38:33 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-06 10:41:12 -0800 |
| commit | 8e3a6f16ba5874b69968cd450334829262513fd1 (patch) | |
| tree | ae5f8535f87377c101eabda9c5508725f5f2b7bd /fs/ecryptfs/crypto.c | |
| parent | cc11beffdf80ca31dff21422fa2a5e54d25f1494 (diff) | |
| download | lwn-8e3a6f16ba5874b69968cd450334829262513fd1.tar.gz lwn-8e3a6f16ba5874b69968cd450334829262513fd1.zip | |
eCryptfs: set inode key only once per crypto operation
There is no need to keep re-setting the same key for any given eCryptfs inode.
This patch optimizes the use of the crypto API and helps performance a bit.
Signed-off-by: Trevor Highland <trevor.highland@gmail.com>
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ecryptfs/crypto.c')
| -rw-r--r-- | fs/ecryptfs/crypto.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 4d1b2b4eb79e..7eaa395a77bd 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -355,8 +355,11 @@ static int encrypt_scatterlist(struct ecryptfs_crypt_stat *crypt_stat, } /* Consider doing this once, when the file is opened */ mutex_lock(&crypt_stat->cs_tfm_mutex); - rc = crypto_blkcipher_setkey(crypt_stat->tfm, crypt_stat->key, - crypt_stat->key_size); + if (!(crypt_stat->flags & ECRYPTFS_KEY_SET)) { + rc = crypto_blkcipher_setkey(crypt_stat->tfm, crypt_stat->key, + crypt_stat->key_size); + crypt_stat->flags |= ECRYPTFS_KEY_SET; + } if (rc) { ecryptfs_printk(KERN_ERR, "Error setting key; rc = [%d]\n", rc); |