В Mon, 14 Oct 2013 21:12:06 -0600 Chris Murphy <li...@colorremedies.com> пишет:
> > So actually, this is a bit more than somewhat messy, whether the prefix > should be formatted relative to the default subvolume, or absolute from top > level 5 subvolume. It depends on the use case. > > So just like '-o subvol=root' has a different meaning than '-o subvol=/root' > there is a difference between prefix=(hd0,msdos1)boot/grub/ and > prefix=(hd0,msdos1)/boot/grub/ > I do not know whether it was the case in the past, but today there is *no* difference between using absolute or relative form. As I already said, internally btrfs mounts top level and starts from there anyway. linux-xtd6:/mnt # btrfs subvolume list /mnt ID 256 gen 7 top level 5 path dir1/sub1 ID 257 gen 7 top level 5 path dir2/sub2 linux-xtd6:/mnt # btrfs subvolume get-default /mnt ID 256 gen 7 top level 5 path dir1/sub1 linux-xtd6:~ # umount /mnt linux-xtd6:~ # mount /dev/sdb /mnt linux-xtd6:~ # ls -l /mnt total 0 -rw-r--r-- 1 root root 0 Oct 15 16:50 I am subvolume 1 linux-xtd6:~ # umount /mnt linux-xtd6:~ # mount -o subvol=/dir2/sub2 /dev/sdb /mnt linux-xtd6:~ # ls -l /mnt total 0 -rw-r--r-- 1 root root 0 Oct 15 16:50 I am subvolume 2 linux-xtd6:~ # umount /mnt linux-xtd6:~ # mount -o subvol=dir2/sub2 /dev/sdb /mnt linux-xtd6:~ # ls -l /mnt total 0 -rw-r--r-- 1 root root 0 Oct 15 16:50 I am subvolume 2 I'm not sure when and how top level may become != 5. _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
