After changing the default subvolume, I can't mount a nested subvolume with a correct relative pathname to the default subvolume; it can only be mounted by absolute path or subvolid.
Setup: 3.11.4-302.fc20.x86_64 btrfs-progs-0.20.rc1.20130917git194aa4a-1.fc20.x86_64 dir = a directory, sub=a subvolume, nested=a subvolume; set-default is top level 5 # mount -o subvol=dir/sub /dev/vda1 /mnt # btrfs subvol list /mnt ID 263 gen 140 top level 5 path dir/sub ID 264 gen 140 top level 263 path nested # btrfs subvol set-default 263 /mnt # umount /mnt # mount -o subvol=nested /dev/vda1 /mnt mount: mount(2) failed: No such file or directory # mount -o subvol=/nested /dev/vda1 /mnt mount: mount(2) failed: No such file or directory # mount -o subvol=/dir/sub/nested /dev/vda1 /mnt [works] # umount /mnt # mount -o subvolid=264 /dev/vda1 /mnt [works] The subvol nested is under dir/sub which is ID 263. So if set-default is 263, I should be able to mount with subvol=nested as a relative path to the default subvolume, but it fails. There's no meaningful kernel message at the time of the failed mount, just: [ 4265.386990] device label fedora devid 1 transid 165 /dev/vda1 But I get the exact same message with a successful mount. So should the mounting of relative pathnames still work? Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
