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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 | |
| parent | cc11beffdf80ca31dff21422fa2a5e54d25f1494 (diff) | |
| download | kernel_samsung_aries-8e3a6f16ba5874b69968cd450334829262513fd1.zip kernel_samsung_aries-8e3a6f16ba5874b69968cd450334829262513fd1.tar.gz kernel_samsung_aries-8e3a6f16ba5874b69968cd450334829262513fd1.tar.bz2 | |
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>
| -rw-r--r-- | fs/ecryptfs/crypto.c | 7 | ||||
| -rw-r--r-- | fs/ecryptfs/ecryptfs_kernel.h | 1 |
2 files changed, 6 insertions, 2 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 4d1b2b4..7eaa395 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); diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h index 3d637e9..2a61039 100644 --- a/fs/ecryptfs/ecryptfs_kernel.h +++ b/fs/ecryptfs/ecryptfs_kernel.h @@ -234,6 +234,7 @@ struct ecryptfs_crypt_stat { #define ECRYPTFS_KEY_VALID 0x00000080 #define ECRYPTFS_METADATA_IN_XATTR 0x00000100 #define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200 +#define ECRYPTFS_KEY_SET 0x00000400 u32 flags; unsigned int file_version; size_t iv_bytes; |