Comment 7 for bug 460246

I created a /sbin/fsck.btrfs with:

#!/bin/sh

opts=""

for arg; do
    case "$arg" in
      -*)
        continue
      ;;
      *)
        opts="$opts $arg"
      ;;
    esac
done

exec echo /sbin/btrfsck $opts

it's a bit crude, but seems to call btrfsck correctly, however I still can't boot:
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Begin: Running /scripts/local-premount ... [ 3.909118] usb 1-1.1: new high speed USB device using ehci-omap and address 3
done.
[ 4.003784] device label rootfs devid 1 transid 59 /dev/disk/by-uuid/ff40f0eb-61ad-43d5-a494-ea19859ac634
[ 4.033538] Btrfs detected SSD devices, enabling SSD mode
Begin: Running /scripts/local-bottom ... done.
done.
Begin: Running /scripts/init-bottom ... done.
fsck from util-linux-ng 2.17.2
/sbin/btrfsck /dev/mmcblk0p2
mount: / not mounted already, or bad option
mountall: mount / [240] terminated with status 32
mountall: Filesystem could not be mounted: /
An error occurred while mounting /
Press S to skip mounting or M for manual recovery