Toke HÃiland-JÃrgensen wrote:
> Hi
>
> I am having a problem with my btrfs partitions: symlinks are reported to
> have different device numbers than directories and regular files, even
> though they are on the same partition. This causes my backup software to
> mess up backing up the symlinks.
>
> An illustrative example:
>
> $ touch tmp; ln -s tmp tmp2; stat tmp tmp2
> File: `tmp'
> Size: 0 Blocks: 0 IO Block: 4096 regular empty file
> Device: 15h/21d Inode: 984027 Links: 1
> --- snip ---
> File: `tmp2' -> `tmp'
> Size: 3 Blocks: 0 IO Block: 4096 symbolic link
> Device: 13h/19d Inode: 984028 Links: 1
> --- snip ---
>
> $ uname -r
> 2.6.35-ck
>
> I'm not using subvolumes, or any fancy features of btrfs, really. I'm
> running Arch Linux.
>
> Is this normal? And if not, how do I fix it?
>
> Any help would be greatly appreciated. Thanks in advance.
>
This should fix it:
=============
[PATCH] btrfs: Show device attr correctly for symlinks
Symlinks and files of other types show different device numbers, though
they are on the same partition:
$ touch tmp; ln -s tmp tmp2; stat tmp tmp2
File: `tmp'
Size: 0 Blocks: 0 IO Block: 4096 regular empty file
Device: 15h/21d Inode: 984027 Links: 1
--- snip ---
File: `tmp2' -> `tmp'
Size: 3 Blocks: 0 IO Block: 4096 symbolic link
Device: 13h/19d Inode: 984028 Links: 1
Reported-by: Toke HÃiland-JÃrgensen <toke@xxxxxxx>
Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
---
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 5132c9a..d10b6d4 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7139,6 +7139,7 @@ static const struct inode_operations btrfs_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = page_follow_link_light,
.put_link = page_put_link,
+ .getattr = btrfs_getattr,
.permission = btrfs_permission,
.setxattr = btrfs_setxattr,
.getxattr = btrfs_getxattr,
--
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