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Btrfs: switch to crc32c instead of sha256

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-05-10 12:36:17 -04:00
committed by David Woodhouse
parent 8d7be552a7
commit 509659cde5
3 changed files with 28 additions and 23 deletions
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12
fs/btrfs/disk-io.c
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@ -196,14 +196,14 @@ int btrfs_csum_data(struct btrfs_root * root, char *data, size_t len,
ret = crypto_hash_digest(&desc, &sg, 1, result);
spin_unlock(&root->fs_info->hash_lock);
if (ret) {
printk("sha256 digest failed\n");
printk("digest failed\n");
}
return ret;
}
static int csum_tree_block(struct btrfs_root *root, struct buffer_head *bh,
int verify)
{
char result[BTRFS_CSUM_SIZE];
char result[BTRFS_CRC32_SIZE];
int ret;
struct btrfs_node *node;
@ -212,14 +212,14 @@ static int csum_tree_block(struct btrfs_root *root, struct buffer_head *bh,
if (ret)
return ret;
if (verify) {
if (memcmp(bh->b_data, result, BTRFS_CSUM_SIZE)) {
if (memcmp(bh->b_data, result, BTRFS_CRC32_SIZE)) {
printk("checksum verify failed on %Lu\n",
bh_blocknr(bh));
return 1;
}
} else {
node = btrfs_buffer_node(bh);
memcpy(node->header.csum, result, BTRFS_CSUM_SIZE);
memcpy(node->header.csum, result, BTRFS_CRC32_SIZE);
}
return 0;
}
@ -576,10 +576,10 @@ struct btrfs_root *open_ctree(struct super_block *sb)
sizeof(struct btrfs_key));
insert_inode_hash(fs_info->btree_inode);
mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS);
fs_info->hash_tfm = crypto_alloc_hash("sha256", 0, CRYPTO_ALG_ASYNC);
fs_info->hash_tfm = crypto_alloc_hash("crc32c", 0, CRYPTO_ALG_ASYNC);
spin_lock_init(&fs_info->hash_lock);
if (!fs_info->hash_tfm || IS_ERR(fs_info->hash_tfm)) {
printk("failed to allocate sha256 hash\n");
printk("failed to allocate digest hash\n");
return NULL;
}
mutex_init(&fs_info->trans_mutex);