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btrfs: tree-log: check btrfs_lookup_data_extent return value

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Function btrfs_lookup_data_extent calls btrfs_search_slot to verify if
the EXTENT_ITEM exists in the extent tree. btrfs_search_slot can return
values bellow zero if an error happened.

Function replay_one_extent currently checks if the search found
something (0 returned) and increments the reference, and if not, it
seems to evaluate as 'not found'.

Fix the condition by checking if the value was bellow zero and return
early.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Marcos Paulo de Souza 2021-08-02 09:34:00 -03:00 committed by David Sterba
parent 8be2ba2e0e
commit 3736127a3a
1 changed files with 3 additions and 1 deletions
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4
fs/btrfs/tree-log.c
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@ -753,7 +753,9 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
*/
ret = btrfs_lookup_data_extent(fs_info, ins.objectid,
ins.offset);
if (ret == 0) {
if (ret < 0) {
goto out;
} else if (ret == 0) {
btrfs_init_generic_ref(&ref,
BTRFS_ADD_DELAYED_REF,
ins.objectid, ins.offset, 0);