btrfs: check the right error variable in btrfs_del_dir_entries_in_log
With my new locking code dbench is so much faster that I tripped over a
transaction abort from ENOSPC. This turned out to be because
btrfs_del_dir_entries_in_log was checking for ret == -ENOSPC, but this
function sets err on error, and returns err. So instead of properly
marking the inode as needing a full commit, we were returning -ENOSPC
and aborting in __btrfs_unlink_inode. Fix this by checking the proper
variable so that we return the correct thing in the case of ENOSPC.
The ENOENT needs to be checked, because btrfs_lookup_dir_item_index()
can return -ENOENT if the dir item isn't in the tree log (which would
happen if we hadn't fsync'ed this guy). We actually handle that case in
__btrfs_unlink_inode, so it's an expected error to get back.
Fixes: 4a500fd178
("Btrfs: Metadata ENOSPC handling for tree log")
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add note and comment about ENOENT ]
Signed-off-by: David Sterba <dsterba@suse.com>
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@ -3449,11 +3449,13 @@ fail:
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btrfs_free_path(path);
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out_unlock:
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mutex_unlock(&dir->log_mutex);
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if (ret == -ENOSPC) {
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if (err == -ENOSPC) {
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btrfs_set_log_full_commit(trans);
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ret = 0;
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} else if (ret < 0)
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btrfs_abort_transaction(trans, ret);
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err = 0;
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} else if (err < 0 && err != -ENOENT) {
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/* ENOENT can be returned if the entry hasn't been fsynced yet */
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btrfs_abort_transaction(trans, err);
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}
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btrfs_end_log_trans(root);
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