| #!/sbin/openrc-run |
| # Copyright 1999-2019 Gentoo Authors |
| # Distributed under the terms of the GNU General Public License v2 |
| |
| depend() { |
| # As of .67-r1, we call ALL lvm start/stop scripts with --sysinit, that |
| # means dmeventd is NOT notified, as it cannot be safely running |
| before dmeventd checkfs fsck |
| after modules |
| } |
| |
| dm_in_proc() { |
| local retval=0 |
| for x in devices misc ; do |
| grep -qs 'device-mapper' /proc/${x} |
| retval=$((${retval} + $?)) |
| done |
| return ${retval} |
| } |
| |
| # char **build_dmsetup_command(volume) |
| # |
| # Returns complete dmsetup command given single volume name |
| build_dmsetup_command() { |
| local count dmsetup_cmd |
| |
| # Number of lines mentioning volume name |
| count=$(grep -v -e '^[[:space:]]*\(#\|$\)' /etc/dmtab | grep -c ${1}) |
| |
| # If there's just one line: |
| if [ ${count} -eq 1 ] ; then |
| echo "echo $(grep -v -e '^[[:space:]]*\(#\|$\)' /etc/dmtab | \ |
| grep ${1} | awk '{$1=""; print $0}') | /sbin/dmsetup create ${1}" |
| |
| # For all cases with more lines: |
| elif [ ${count} -gt 1 ] ; then |
| for c in $( seq 1 ${count} ) ; do |
| if [ ${c} -eq 1 ] ; then |
| # Heavy escaping in awk-statement because we cannot use apostrophes |
| dmsetup_cmd="echo -e $(grep -v -e '^[[:space:]]*\(#\|$\)' /etc/dmtab | \ |
| grep ${1} | awk NR==${c}\ \{\$1=\"\"\;\ print\ \$0\})" |
| else |
| # Append starting with newline |
| dmsetup_cmd="${dmsetup_cmd}\\\\n \ |
| $(grep -v -e '^[[:space:]]*\(#\|$\)' /etc/dmtab | \ |
| grep ${1} | awk NR==${c}\ \{\$1=\"\"\;\ print\ \$0\})" |
| fi |
| done |
| echo "${dmsetup_cmd} | /sbin/dmsetup create ${1}" |
| fi |
| |
| return 0 |
| } |
| |
| # char **get_new_dm_volumes(void) |
| # |
| # Return unique volumes from /etc/dmtab |
| get_new_dm_volumes() { |
| local volume |
| |
| # Filter comments and blank lines |
| grep -v -e '^[[:space:]]*\(#\|$\)' /etc/dmtab | \ |
| awk '{ print $1 }' | \ |
| uniq | \ |
| while read volume ; do |
| # If it exists, skip it |
| dmvolume_exists "${volume%:}" && continue |
| |
| echo "${volume%:}" |
| done |
| |
| return 0 |
| } |
| |
| # int dmvolume_exists(volume) |
| # |
| # Return true if volume exists in DM table |
| dmvolume_exists() { |
| local x line volume=$1 |
| |
| [ -z "${volume}" ] && return 1 |
| |
| /sbin/dmsetup ls 2>/dev/null | \ |
| while read line ; do |
| for x in ${line} ; do |
| # the following conditonal return only breaks out |
| # of the while loop, as it is running in a pipe. |
| [ "${x}" = "${volume}" ] && return 1 |
| # We only want to check the volume name |
| break |
| done |
| done |
| |
| # if 1 was returned from the above loop, then indicate that |
| # volume exists |
| [ $? = 1 ] && return 0 |
| |
| # otherwise the loop exited normally and the volume does not |
| # exist |
| return 1 |
| } |
| |
| # int is_empty_dm_volume(volume) |
| # |
| # Return true if the volume exists in DM table, but is empty/non-valid |
| is_empty_dm_volume() { |
| local table volume=$1 |
| |
| set -- $(/sbin/dmsetup table 2>/dev/null | grep -e "^${volume}:") |
| [ "${volume}" = "$1" -a -z "$2" ] |
| } |
| |
| |
| start() { |
| if [ -e /proc/modules ] && ! dm_in_proc ; then |
| modprobe dm-mod 2>/dev/null |
| fi |
| # Ensure the dirs exist for locking and running |
| checkpath -q -d -m 0700 -o root:root /run/lvm /run/lock/lvm |
| |
| local x volume |
| |
| if [ -x /sbin/dmsetup -a -c /dev/mapper/control -a -f /etc/dmtab ] ; then |
| [ -n "$(get_new_dm_volumes)" ] && \ |
| einfo " Setting up device-mapper volumes:" |
| |
| get_new_dm_volumes | \ |
| while read x ; do |
| [ -n "${x}" ] || continue |
| |
| volume="${x##* }" |
| |
| ebegin " Creating volume: ${volume}" |
| if ! eval $(build_dmsetup_command ${volume}) >/dev/null 2>/dev/null ; then |
| eend 1 " Error creating volume: ${volume}" |
| # dmsetup still adds an empty volume in some cases, |
| # so lets remove it |
| is_empty_dm_volume "${volume}" && \ |
| /sbin/dmsetup remove "${volume}" 2>/dev/null |
| else |
| eend 0 |
| fi |
| done |
| fi |
| } |
| |