466 lines
14 KiB
Diff
466 lines
14 KiB
Diff
Index: os-prober/common.sh
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===================================================================
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--- os-prober.orig/common.sh
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+++ os-prober/common.sh
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@@ -150,6 +150,7 @@ parse_proc_mounts () {
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done
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}
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+# add forth parameter to pickup btrfs subvol info
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parsefstab () {
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while read -r line; do
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case "$line" in
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@@ -160,12 +161,22 @@ parsefstab () {
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set -f
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set -- $line
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set +f
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- printf '%s %s %s\n' "$1" "$2" "$3"
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+ printf '%s %s %s %s\n' "$1" "$2" "$3" "$4"
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;;
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esac
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done
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}
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+#check_btrfs_mounted $bootsv $bootuuid)
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+check_btrfs_mounted () {
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+ bootsv="$1"
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+ bootuuid="$2"
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+ bootdev=$(blkid | grep "$bootuuid" | cut -d ':' -f 1)
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+ bindfrom=$(grep " btrfs " /proc/self/mountinfo |
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+ grep " $bootdev " | grep " /$bootsv " | cut -d ' ' -f 5)
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+ printf "%s" "$bindfrom"
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+}
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+
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unescape_mount () {
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printf %s "$1" | \
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sed 's/\\011/ /g; s/\\012/\n/g; s/\\040/ /g; s/\\134/\\/g'
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Index: os-prober/linux-boot-prober
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===================================================================
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--- os-prober.orig/linux-boot-prober
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+++ os-prober/linux-boot-prober
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@@ -5,16 +5,143 @@ set -e
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newns "$@"
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require_tmpdir
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+ERR="n"
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+
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+tmpmnt=/var/lib/os-prober/mount
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+if [ ! -d "$tmpmnt" ]; then
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+ mkdir "$tmpmnt"
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+fi
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+
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+mounted=
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+bootmnt=
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+bootsv=
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+bootuuid=
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grep "^/dev/" /proc/mounts | parse_proc_mounts >"$OS_PROBER_TMP/mounted-map" || true
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-partition="$1"
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+if [ -z "$1" ]; then
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+ ERR=y
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+elif [ "$1" = btrfs -a -z "$2" ]; then
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+ ERR=y
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+elif [ "$1" = btrfs -a -z "$3" ]; then
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+ ERR=y
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+elif [ "$1" = btrfs ]; then
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+ type=btrfs
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+ echo "$2" | grep -q "^UUID=" || ERR=y
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+ echo "$3" | grep -q "^subvol=" || ERR=y
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+ export "$2"
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+ export "$3"
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+ partition=$(blkid | grep "$UUID" | cut -d ':' -f 1 | tr '\n' ' ' | cut -d ' ' -f 1)
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+ debug "btrfs: partition=$partition, UUID=$UUID, subvol=$subvol"
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+else
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+ partition="$1"
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+ type=other
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+fi
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-if [ -z "$partition" ]; then
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+if [ "x$ERR" != xn ]; then
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echo "usage: linux-boot-prober partition" >&2
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+ echo " linux-boot-prober btrfs UUID=<> subvol=<>" >&2
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exit 1
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fi
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+if [ "$type" = btrfs ]; then
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+ # handle all of the btrfs stuff here
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+ if [ ! -e "/proc/self/mountinfo" ]; then
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+ warn "/proc/self/mountinfo does not exist, exiting"
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+ umount "$tmpmnt" 2>/dev/null
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+ rmdir "$tmpmnt" 2>/dev/null
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+ exit 1
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+ fi
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+ mpoint=$(grep "btrfs" /proc/self/mountinfo | grep " /$subvol " | grep " $partition " | cut -d ' ' -f 5)
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+ if [ "$mpoint" = "/" ]; then
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+ warn "specifying active root not valid, exiting"
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+ umount "$tmpmnt" 2>/dev/null
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+ rmdir "$tmpmnt" 2>/dev/null
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+ exit 1
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+ fi
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+ if [ "$mpoint" = "$tmpmnt" ]; then
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+ warn "btrfs subvol=$subvool, UUID=$UUID, already mounted on $tmpmnt **ERROR**"
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+ umount "$tmpmnt" 2>/dev/null
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+ rmdir "$tmpmnt" 2>/dev/null
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+ exit 1
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+ fi
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+ if [ -z "$mpoint" ]; then
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+ # mount the btrfs root
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+ if ! mount -o subvol=$subvol -t btrfs -U $UUID "$tmpmnt" 2>/dev/null; then
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+ warn "error mounting btrfs subvol=$subvol UUID=$UUID"
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+ umount "$tmpmnt/boot" 2>/dev/null
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+ umount "$tmpmnt" 2>/dev/null
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+ rmdir "$tmpmnt" 2>/dev/null
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+ exit 1
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+ fi
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+ else
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+ # bind-mount
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+ if ! mount -o bind "$mpoint" "$tmpmnt" 2>/dev/null; then
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+ warn "error mounting btrfs bindfrom=$mpoint subvol=$subvol UUID=$UUID"
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+ umount "$tmpmnt/boot" 2>/dev/null
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+ umount "$tmpmnt" 2>/dev/null
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+ rmdir "$tmpmnt" 2>/dev/null
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+ exit 1
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+ fi
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+ fi
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+ debug "mounted btrfs $partition, subvol=$subvol on $tmpmnt"
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+ if [ ! -e "$tmpmnt/etc/fstab" ]; then
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+ warn "btrfs subvol=$subvol not root"
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+ umount "$tmpmnt" 2>/dev/null
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+ rmdir "$tmpmnt" 2>/dev/null
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+ exit 1
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+ fi
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+ bootmnt=$(parsefstab < "$tmpmnt/etc/fstab" | grep " /boot ") || true
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+ if [ -z "$bootmnt" ]; then
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+ # /boot is part of the root
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+ bootpart="$partition"
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+ bootsv="$subvol"
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+ elif echo "$bootmnt" | cut -d ' ' -f 3 | grep -q "btrfs"; then
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+ # separate btrfs /boot subvolume
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+ bootsv=$(echo "$bootmnt" | cut -d ' ' -f 4 | grep "^subvol=" | sed "s/subvol=//" )
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+ bootuuid=$(echo "$bootmnt" | cut -d ' ' -f 1 | grep "^UUID=" | sed "s/UUID=//" )
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+ debug "mounting btrfs $tmpmnt/boot UUID=$bootuuid subvol=$bootsv"
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+ bindfrom=$(check_btrfs_mounted $bootsv $bootuuid)
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+ if [ -n "$bindfrom" ]; then
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+ # already mounted some place
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+ if ! mount -o bind $bindfrom "$tmpmnt/boot" 2>/dev/null; then
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+ warn "error bind mounting btrfs boot subvol=$bootsv, from=$bindfrom"
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+ umount "$tmpmnt/boot" 2>/dev/null
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+ umount "$tmpmnt" 2>/dev/null
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+ rmdir "$tmpmnt" 2>/dev/null
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+ exit 1
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+ fi
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+ elif ! mount -o subvol=$bootsv -t btrfs -U $bootuuid "$tmpmnt/boot" 2>/dev/null; then
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+ warn "error mounting btrfs boot partition subvol=$bootsv, UUID=$bootuuid"
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+ umount "$tmpmnt/boot" 2>/dev/null
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+ umount "$tmpmnt" 2>/dev/null
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+ rmdir "$tmpmnt" 2>/dev/null
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+ exit 1
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+ fi
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+ bootpart=$(grep " btrfs " /proc/self/mountinfo | grep " /$bootsv " | cut -d ' ' -f 10)
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+ else
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+ # non-btrfs partition or logical volume
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+ linux_mount_boot $partition $tmpmnt
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+ bootpart="${mountboot%% *}"
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+ bootsv=
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+ fi
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+
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+ test="/usr/lib/linux-boot-probes/mounted/40grub2"
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+ if [ -f $test ] && [ -x $test ]; then
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+ debug "running $test $partition $bootpart $tmpmnt $type $subvol $bootsv"
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+ if $test "$partition" "$bootpart" "$tmpmnt" "$type" "$subvol" "$bootsv"; then
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+ debug "$test succeeded"
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+ fi
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+ fi
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+ umount "$tmpmnt/boot" 2>/dev/null || true
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+ if ! umount "$tmpmnt" 2>/dev/null; then
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+ warn "problem umount $tmpmnt"
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+ fi
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+ rmdir "$tmpmnt" 2>/dev/null || true
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+
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+ exit 0
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+fi
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+
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if ! mapped="$(mapdevfs "$partition")"; then
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log "Device '$partition' does not exist; skipping"
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continue
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@@ -22,8 +149,8 @@ fi
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if ! grep -q "^$mapped " "$OS_PROBER_TMP/mounted-map"; then
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for test in /usr/lib/linux-boot-probes/*; do
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- debug "running $test"
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if [ -x $test ] && [ -f $test ]; then
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+ debug "running $test"
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if $test "$partition"; then
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debug "linux detected by $test"
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break
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Index: os-prober/linux-boot-probes/mounted/common/40grub2
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===================================================================
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--- os-prober.orig/linux-boot-probes/mounted/common/40grub2
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+++ os-prober/linux-boot-probes/mounted/common/40grub2
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@@ -2,17 +2,30 @@
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. /usr/share/os-prober/common.sh
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set -e
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+# add support for btrfs with no separate /boot
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+# that is, rootsv = bootsv
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partition="$1"
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bootpart="$2"
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mpoint="$3"
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type="$4"
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+rootsv="$5"
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+bootsv="$6"
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found_item=0
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entry_result () {
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+ if [ "x$type" = "xbtrfs" -a "$partition" = "$bootpart" ]; then
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+ # trim off the leading subvol
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+ kernelfile=$(echo "$kernel" | cut -d '/' -f 2- | cut -d '/' -f 2-)
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+ if [ "x$rootsv" != "x$bootsv" ]; then
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+ kernelfile="/boot/$kernelfile"
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+ fi
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+ else
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+ kernelfile=$kernel
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+ fi
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if [ "$ignore_item" = 0 ] && \
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[ -n "$kernel" ] && \
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- [ -e "$mpoint/$kernel" ]; then
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+ [ -e "$mpoint/$kernelfile" ]; then
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result "$rootpart:$bootpart:$title:$kernel:$initrd:$parameters"
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found_item=1
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fi
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Index: os-prober/os-prober
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===================================================================
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--- os-prober.orig/os-prober
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+++ os-prober/os-prober
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@@ -71,9 +71,12 @@ partitions () {
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# Also detect OSes on LVM volumes (assumes LVM is active)
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if type lvs >/dev/null 2>&1; then
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- echo "$(LVM_SUPPRESS_FD_WARNINGS=1 log_output lvs --noheadings --separator : -o vg_name,lv_name |
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+ echo "$(LVM_SUPPRESS_FD_WARNINGS=1 log_output lvs --noheadings --separator : -o vg_name,lv_name 2>/dev/null |
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sed "s|-|--|g;s|^[[:space:]]*\(.*\):\(.*\)$|/dev/mapper/\1-\2|")"
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fi
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+
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+ # now lets make sure we got all of the btrfs partitions and disks
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+ blkid | grep 'TYPE="btrfs"' | cut -d ':' -f 1
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}
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parse_proc_swaps () {
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@@ -131,6 +134,8 @@ if [ -f /proc/mdstat ] ; then
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grep "^md" /proc/mdstat | cut -d: -f2- | parse_proc_mdstat >"$OS_PROBER_TMP/raided-map" || true
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fi
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+: >"$OS_PROBER_TMP/btrfs-vols"
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+
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for partition in $(partitions); do
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if ! mapped="$(mapdevfs "$partition")"; then
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log "Device '$partition' does not exist; skipping"
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@@ -149,7 +154,26 @@ for partition in $(partitions); do
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continue
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fi
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- if ! grep -q "^$mapped " "$OS_PROBER_TMP/mounted-map" ; then
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+ # do btrfs processing here; both mounted and unmounted will
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+ # be handled by 50mounted-tests so we can do a subvol only once.
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+ type=$(blkid -o value -s TYPE $mapped || true)
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+ if [ "$type" = btrfs ]; then
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+ uuid=$(blkid -o value -s UUID $mapped)
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+ if grep -q "^$uuid" "$OS_PROBER_TMP/btrfs-vols" ; then
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+ continue
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+ fi
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+ debug "btrfs volume uuid=$uuid partition=$partition"
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+ echo "$uuid" >>"$OS_PROBER_TMP/btrfs-vols"
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+ test="/usr/lib/os-probes/50mounted-tests"
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+ if [ -f "$test" ] && [ -x "$test" ]; then
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+ debug "running $test on btrfs $partition"
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+ if "$test" btrfs "$uuid" "$partition"; then
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+ debug "os detected by $test"
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+ continue
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+ fi
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+ fi
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+
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+ elif ! grep -q "^$mapped " "$OS_PROBER_TMP/mounted-map" ; then
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for test in /usr/lib/os-probes/*; do
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if [ -f "$test" ] && [ -x "$test" ]; then
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debug "running $test on $partition"
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Index: os-prober/os-probes/common/50mounted-tests
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===================================================================
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--- os-prober.orig/os-probes/common/50mounted-tests
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+++ os-prober/os-probes/common/50mounted-tests
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@@ -1,20 +1,36 @@
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#!/bin/sh
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# Sub-tests that require a mounted partition.
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set -e
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-partition="$1"
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. /usr/share/os-prober/common.sh
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-types="$(fs_type "$partition")" || types=NOT-DETECTED
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+if [ "x$1" = xbtrfs ]; then
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+ types=btrfs
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+ if [ -z "$2" -o -z "$3" ]; then
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+ debug "missing btrfs parameters, exiting"
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+ exit 1
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+ fi
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+ UUID="$2"
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+ BTRFSDEV="$3"
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+else
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+ partition="$1"
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+ types="$(fs_type "$partition")" || types=NOT-DETECTED
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+fi
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+
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if [ "$types" = NOT-DETECTED ]; then
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debug "$1 type not recognised; skipping"
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- exit 0
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+ exit 1
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+elif [ "x$types" = "x" ]; then
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+ exit 1
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+elif [ "$types" = LVM2_member ]; then
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+ debug "skipping LVM2 Volume Group on $partition"
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+ exit 1
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elif [ "$types" = swap ]; then
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debug "$1 is a swap partition; skipping"
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- exit 0
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+ exit 1
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elif [ "$types" = crypto_LUKS ]; then
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debug "$1 is a LUKS partition; skipping"
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- exit 0
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+ exit 1
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elif [ "$types" = ntfs ]; then
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if type ntfs-3g >/dev/null 2>&1; then
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types='ntfs-3g ntfs'
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@@ -23,7 +39,7 @@ elif [ -z "$types" ]; then
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if type cryptsetup >/dev/null 2>&1 && \
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cryptsetup luksDump "$partition" >/dev/null 2>&1; then
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debug "$1 is a LUKS partition; skipping"
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- exit 0
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+ exit 1
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fi
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for type in $(grep -v nodev /proc/filesystems); do
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# hfsplus filesystems are mountable as hfs. Try hfs last so
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@@ -46,6 +62,76 @@ if [ ! -d "$tmpmnt" ]; then
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fi
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mounted=
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+
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+# all btrfs processing here. Handle both unmounted and
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+# mounted subvolumes.
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+if [ "$types" = btrfs ]; then
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+ partition="$BTRFSDEV"
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+ debug "begin btrfs processing for $UUID"
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+ # note that the btrfs volume must not be mounted ro
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+ if mount -t btrfs -U "$UUID" "$tmpmnt" 2>/dev/null; then
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+ debug "btrfs volume $UUID mounted"
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+ else
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+ warn "cannot mount btrfs volume $UUID, exiting"
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+ rmdir "$tmpmnt" || true
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+ exit 1
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+ fi
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+ # besides regular subvols, get ro and snapshot so thet can be excluded
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+ subvols=$(btrfs subvolume list "$tmpmnt" | cut -d ' ' -f 9)
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+ rosubvols=$(btrfs subvolume list -r "$tmpmnt" | cut -d ' ' -f 9)
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+ sssubvols=$(btrfs subvolume list -s "$tmpmnt" | cut -d ' ' -f 9)
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+ if ! umount "$tmpmnt"; then
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+ warn "failed to umount btrfs volume on $tmpmnt"
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+ rmdir "$tmpmnt" || true
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+ exit 1
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+ fi
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+ if [ -z "$subvols" ]; then
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+ debug "no subvols found on btrfs volume $UUID"
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+ exit 1
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+ fi
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+ found=
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+ for subvol in $subvols; do
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+ debug "begin btrfs processing for $UUID subvol=$subvol"
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+ if echo "$rosubvols" | grep -q -x "$subvol"; then
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+ continue
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+ fi
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+ if echo "$sssubvols" | grep -q -x "$subvol"; then
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+ continue
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+ fi
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+ mounted=
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+ mpoint="$(grep btrfs /proc/self/mountinfo | grep "$partition " | grep "/$subvol " | cut -d ' ' -f 5)"
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+ if [ -n "$mpoint" ]; then
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+ if [ "x$mpoint" = "x/" ]; then
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+ continue # this is the root for the running system
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+ fi
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+ mounted=1
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+ else
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+ # again, do not mount btrfs ro
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+ mount -t btrfs -o subvol="$subvol" -U "$UUID" "$tmpmnt"
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+ mpoint="$tmpmnt"
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+ fi
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+ test="/usr/lib/os-probes/mounted/90linux-distro"
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+ if [ -f "$test" ] && [ -x "$test" ]; then
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+ debug "running subtest $test"
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+ if "$test" "$partition" "$mpoint" btrfs "UUID=$UUID" "subvol=$subvol"; then
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+ debug "os found by subtest $test on subvol $subvol"
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+ found=1
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+ fi
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+ fi
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+ if [ -z "$mounted" ]; then
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+ if ! umount "$tmpmnt"; then
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+ warn "failed to umount $tmpmnt"
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+ fi
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+ fi
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+ done
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+ rmdir "$tmpmnt" || true
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+ if [ "$found" ]; then
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+ exit 0
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+ else
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+ exit 1
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+ fi
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+fi
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+
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if type grub-mount >/dev/null 2>&1 && \
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type grub-probe >/dev/null 2>&1 && \
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grub-mount "$partition" "$tmpmnt" 2>/dev/null; then
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Index: os-prober/os-probes/mounted/common/90linux-distro
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===================================================================
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--- os-prober.orig/os-probes/mounted/common/90linux-distro
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+++ os-prober/os-probes/mounted/common/90linux-distro
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|
@@ -7,6 +7,8 @@ set -e
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partition="$1"
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dir="$2"
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type="$3"
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+uuid="$4"
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+subvol="$5"
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# This test is inaccurate, but given separate / and /boot partitions and the
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# fact that only some architectures have ld-linux.so, I can't see anything
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@@ -135,7 +137,11 @@ if [ -L "$dir"/lib ] || (ls "$dir"/lib*/
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fi
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label="$(count_next_label "$short")"
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- result "$partition:$long:$label:linux"
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+ if [ "x$type" = "xbtrfs" -a "x$uuid" != "x" -a "x$subvol" != "x" ]; then
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+ result "$partition:$long:$label:linux:$type:$uuid:$subvol"
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+ else
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+ result "$partition:$long:$label:linux"
|
|
+ fi
|
|
exit 0
|
|
else
|
|
exit 1
|
|
Index: os-prober/README.btrfs
|
|
===================================================================
|
|
--- /dev/null
|
|
+++ os-prober/README.btrfs
|
|
@@ -0,0 +1,15 @@
|
|
+BTRFS is a new filesystem which combines the filesystem with logical volume
|
|
+management (subvolumes). For further information, see:
|
|
+ https://btrfs.wiki.kernel.org/index.php/Main_Page
|
|
+ https://btrfs.wiki.kernel.org/index.php/FAQ
|
|
+
|
|
+In order to support BTRFS, a number of changes were necessary to os-prober,
|
|
+os-probes/common/50mounted-tests, os-probes/mounted/common/90linux-distro,
|
|
+linux-boot-prober, and linux-boot-probes/common/50mounted-tests.
|
|
+
|
|
+The biggest impact will be to grub2 where there is additional information
|
|
+output by os-prober and where, if a BTRFS subvolume is being used for root,
|
|
+the parameters for linux-boot-prober have changed.
|
|
+
|
|
+Sun 30 Dec 2012 11:49:52 AM EST Gene Czarcinski <gene@czarc.net>
|
|
+
|