[PATCH] btrfs: Return EXDEV for cross file system snapshot

[Kusanagi Kouichi]

EXDEV seems an appropriate error if an operation fails bacause it
crosses file system boundaries.

Signed-off-by: Kusanagi Kouichi <slash@xxxxxxxxxxxxxxx>
---
 fs/btrfs/ioctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 34772cb..0176045 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1573,7 +1573,7 @@ static noinline int btrfs_ioctl_snap_create_transid(struct file *file,
 		if (src_inode->i_sb != file_inode(file)->i_sb) {
 			btrfs_info(BTRFS_I(src_inode)->root->fs_info,
 				   "Snapshot src from another FS");
-			ret = -EINVAL;
+			ret = -EXDEV;
 		} else if (!inode_owner_or_capable(src_inode)) {
 			/*
 			 * Subvolume creation is not restricted, but snapshots
-- 
1.9.rc1

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