hello,
i maintain an unofficial initrd hook in Arch Linux that allows BTRFS
to be used as the root device. i am trying to update the hook to use
the more extensive "btrfs" command, adding support for users to change
their default subvolume from within the initrd (i'm creating a sort of
rollback feature, in conjunction with automatic snapshotting via the
package manager), and adding support for hot spares (via a second
BTRFS pool in which devices are "stolen" to repair the primary array).
anyways, i'm having trouble getting a listing of subvolumes:
$ btrfs subvolume list /
ERROR: can't perform the search
the machine has a BTRFS root. i have also tried creating a snapshot
and pointing the command at that, but i get the same results. am i
using the command wrong? relevant code is from btrfs-list.c:
ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
if (ret < 0) {
fprintf(stderr, "ERROR: can't perform the search\n");
return 0;
}
kernel:
$ uname -r
2.6.33-ARCH
is there a new CONFIG_* kernel parameter that needs to be set since
2.6.32? everything seems to be in order and working fine... any help
appreciated.
thanks,
C Anthony
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