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Make the crc32c code match what the kernel modules are currently doing

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Chris Mason 2007-10-15 16:25:43 -04:00 committed by David Woodhouse
parent 28de03cb0a
commit 167388ab2b
1 changed files with 9 additions and 7 deletions
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16
disk-io.c
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@ -179,25 +179,27 @@ int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
int btrfs_csum_node(struct btrfs_root *root, struct btrfs_node *node)
{
u32 crc;
u32 crc = ~(u32)0;
size_t len = btrfs_level_size(root, btrfs_header_level(&node->header)) -
BTRFS_CSUM_SIZE;
crc = crc32c(0, (char *)(node) + BTRFS_CSUM_SIZE, len);
crc = crc32c(crc, (char *)(node) + BTRFS_CSUM_SIZE, len);
crc = ~cpu_to_le32(crc);
memcpy(node->header.csum, &crc, BTRFS_CRC32_SIZE);
return 0;
}
int btrfs_csum_super(struct btrfs_root *root, struct btrfs_super_block *super)
{
u32 crc;
char block[root->sectorsize];
size_t len = root->sectorsize - BTRFS_CSUM_SIZE;
u32 crc = ~(u32)0;
char block[512];
size_t len = 512 - BTRFS_CSUM_SIZE;
memset(block, 0, root->sectorsize);
memset(block, 0, 512);
memcpy(block, super, sizeof(*super));
crc = crc32c(0, block + BTRFS_CSUM_SIZE, len);
crc = crc32c(crc, block + BTRFS_CSUM_SIZE, len);
crc = ~cpu_to_le32(crc);
memcpy(super->csum, &crc, BTRFS_CRC32_SIZE);
return 0;
}