#!/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 }