Btrfs: Integrate metadata reservation with start_transaction
Besides simplify the code, this change makes sure all metadata
reservation for normal metadata operations are released after
committing transaction.
Changes since V1:
Add code that check if unlink and rmdir will free space.
Add ENOSPC handling for clone ioctl.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 193b58f..007fae5 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -154,15 +154,10 @@
if (trans)
return do_setxattr(trans, inode, name, value, size, flags);
- ret = btrfs_reserve_metadata_space(root, 2);
- if (ret)
- return ret;
+ trans = btrfs_start_transaction(root, 2);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
- trans = btrfs_start_transaction(root, 1);
- if (!trans) {
- ret = -ENOMEM;
- goto out;
- }
btrfs_set_trans_block_group(trans, inode);
ret = do_setxattr(trans, inode, name, value, size, flags);
@@ -174,7 +169,6 @@
BUG_ON(ret);
out:
btrfs_end_transaction_throttle(trans, root);
- btrfs_unreserve_metadata_space(root, 2);
return ret;
}