Hi all, I'm seeing some strange behavior when bind mounting files from a btrfs subvolume. Consider the output below: root@criu2:/tmp# mount -o loop /tmp/tester.btrfs /tmp/dir1 root@criu2:/tmp# touch dir1/file root@criu2:/tmp# sudo mount --bind dir1/file dir2/file root@criu2:/tmp# grep "/tmp/dir" /proc/self/mountinfo 128 24 0:45 / /tmp/dir1 rw,relatime shared:107 - btrfs /dev/loop0 rw,space_cache,subvolid=5,subvol=/ 129 24 0:45 /file /tmp/dir2/file rw,relatime shared:107 - btrfs /dev/loop0 rw,space_cache,subvolid=5,subvol=/file root@criu2:/tmp# btrfs --version btrfs-progs v4.4 root@criu2:/tmp# uname -a Linux criu2 4.4.0-8-generic #23-Ubuntu SMP Wed Feb 24 20:45:30 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux The issue here is that the "subvol=" mount option for the target of the bind mount is "/file" when no such subvolume actually exists. Is this intended? It's confusing to say the least, but seems like a bug to me. Tycho -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
