В Mon, 14 Oct 2013 14:20:14 -0600 Chris Murphy <li...@colorremedies.com> пишет:
> > > Is there a way to detect that mountinfo gives garbage and somehow get > > where the real root points? > > I don't know. I've asked on linux-btrfs@. Instead of rebooting, I merely > tried mounting without options after changing the default subvolume to a > nested subvolume (one attempt subvolume in a subvolume, another a subvolume > in a directory): in both cases /proc/self/mountinfo reports / as the root, > not the full path or ID of the subvolume actually mounted. > > Somehow it seems like the mountinfo root field should return a block device > and full path to the mounted subvolume or its ID. Currently it seems like a > problem. > To quote one of btrfs developer (I had unrelated discussion on openSUSE list): --><-- This is a known problem, on my todo list, with a few non-working solutions. If you mount via subvol=/subvol then /proc/self/mountinfo will show 'subvol' as the mounted subvolume (4th column) 4 19 0:17 /subvol /mnt/ rw,relatime - btrfs /dev/sda15 rw,space_cache but if the subvolume is set-default and then implicitly mounted, mountinfo will not show that (that's the bug). --><-- That said, information can be obtained also using different means (btrfs utility or directly btrfs IOCTL). The question is to which extent we want to depend on existence of btrfsprogs. _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
