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Subject[PATCH] btrfs: Return EXDEV for cross file system snapshot
EXDEV seems an appropriate error if an operation fails bacause it
crosses file system boundaries.

Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
---
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 21da576..15d35cb 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1544,7 +1544,7 @@ static noinline int btrfs_ioctl_snap_create_transid(struct file *file,
if (src_inode->i_sb != file_inode(file)->i_sb) {
printk(KERN_INFO "btrfs: Snapshot src from "
"another FS\n");
- ret = -EINVAL;
+ ret = -EXDEV;
} else {
ret = btrfs_mksubvol(&file->f_path, name, namelen,
BTRFS_I(src_inode)->root,
--
1.8.5.2


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