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| author | Chris Mason <chris.mason@oracle.com> | 2007-10-15 22:22:25 +0200 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 17:03:57 +0200 |
| commit | ff79f8190b6e955ff7a71faf804a3017d526e657 (patch) | |
| tree | d3f56ae2822eb312eba760dcf4df1a058de5a699 /fs/btrfs/file-item.c | |
| parent | Btrfs: Defrag: only walk into nodes with the defrag bit set (diff) | |
| download | linux-ff79f8190b6e955ff7a71faf804a3017d526e657.tar.xz linux-ff79f8190b6e955ff7a71faf804a3017d526e657.zip | |
Btrfs: Add back file data checksumming
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/file-item.c')
| -rw-r--r-- | fs/btrfs/file-item.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index 9a65e97a4e28..10a4c7408600 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -136,27 +136,27 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans, u64 objectid, u64 offset, char *data, size_t len) { - return 0; -#if 0 int ret; struct btrfs_key file_key; struct btrfs_key found_key; struct btrfs_path *path; struct btrfs_csum_item *item; - struct extent_buffer *leaf; + struct extent_buffer *leaf = NULL; u64 csum_offset; + u32 csum_result = ~(u32)0; path = btrfs_alloc_path(); BUG_ON(!path); file_key.objectid = objectid; file_key.offset = offset; - file_key.flags = 0; btrfs_set_key_type(&file_key, BTRFS_CSUM_ITEM_KEY); item = btrfs_lookup_csum(trans, root, path, objectid, offset, 1); - if (!IS_ERR(item)) + if (!IS_ERR(item)) { + leaf = path->nodes[0]; goto found; + } ret = PTR_ERR(item); if (ret == -EFBIG) { u32 item_size; @@ -226,14 +226,15 @@ csum: item = (struct btrfs_csum_item *)((unsigned char *)item + csum_offset * BTRFS_CRC32_SIZE); found: - /* FIXME!!!!!!!!!!!! */ - ret = btrfs_csum_data(root, data, len, &item->csum); + csum_result = btrfs_csum_data(root, data, csum_result, len); + btrfs_csum_final(csum_result, (char *)&csum_result); + write_extent_buffer(leaf, &csum_result, (unsigned long)item, + BTRFS_CRC32_SIZE); btrfs_mark_buffer_dirty(path->nodes[0]); fail: btrfs_release_path(root, path); btrfs_free_path(path); return ret; -#endif } int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |