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Btrfs: fix wrong return value of btrfs_lookup_csum()

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If we don't find the expected csum item, but find a csum item which is
adjacent to the specified extent, we should return -EFBIG, or we should
return -ENOENT. But btrfs_lookup_csum() return -EFBIG even the csum item
is not adjacent to the specified extent. Fix it.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Miao Xie 2013-03-28 08:12:15 +00:00 committed by Josef Bacik
parent 39847c4d3d
commit 82d130ff39
1 changed files with 3 additions and 1 deletions
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4
fs/btrfs/file-item.c
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@ -118,9 +118,11 @@ struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
csums_in_item = btrfs_item_size_nr(leaf, path->slots[0]); csums_in_item = btrfs_item_size_nr(leaf, path->slots[0]);
csums_in_item /= csum_size; csums_in_item /= csum_size;
if (csum_offset >= csums_in_item) { if (csum_offset == csums_in_item) {
ret = -EFBIG; ret = -EFBIG;
goto fail; goto fail;
} else if (csum_offset > csums_in_item) {
goto fail;
} }
} }
item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item); item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item);