147 lines
3.6 KiB
Plaintext
147 lines
3.6 KiB
Plaintext
#!/sbin/openrc-run
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# Copyright 1999-2016 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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depend() {
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# As of .67-r1, we call ALL lvm start/stop scripts with --sysinit, that
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# means dmeventd is NOT notified, as it cannot be safely running
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before dmeventd checkfs fsck
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after modules
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}
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dm_in_proc() {
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local retval=0
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for x in devices misc ; do
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grep -qs 'device-mapper' /proc/${x}
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retval=$((${retval} + $?))
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done
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return ${retval}
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}
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# char **build_dmsetup_command(volume)
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#
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# Returns complete dmsetup command given single volume name
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build_dmsetup_command() {
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local count dmsetup_cmd
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# Number of lines mentioning volume name
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count=$(grep -v -e '^[[:space:]]*\(#\|$\)' /etc/dmtab | grep -c ${1})
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# If there's just one line:
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if [ ${count} -eq 1 ] ; then
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echo "echo $(grep -v -e '^[[:space:]]*\(#\|$\)' /etc/dmtab | \
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grep ${1} | awk '{$1=""; print $0}') | /sbin/dmsetup create ${1}"
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# For all cases with more lines:
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elif [ ${count} -gt 1 ] ; then
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for c in $( seq 1 ${count} ) ; do
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if [ ${c} -eq 1 ] ; then
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# Heavy escaping in awk-statement because we cannot use apostrophes
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dmsetup_cmd="echo -e $(grep -v -e '^[[:space:]]*\(#\|$\)' /etc/dmtab | \
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grep ${1} | awk NR==${c}\ \{\$1=\"\"\;\ print\ \$0\})"
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else
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# Append starting with newline
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dmsetup_cmd="${dmsetup_cmd}\\\\n \
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$(grep -v -e '^[[:space:]]*\(#\|$\)' /etc/dmtab | \
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grep ${1} | awk NR==${c}\ \{\$1=\"\"\;\ print\ \$0\})"
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fi
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done
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echo "${dmsetup_cmd} | /sbin/dmsetup create ${1}"
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fi
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return 0
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}
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# char **get_new_dm_volumes(void)
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#
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# Return unique volumes from /etc/dmtab
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get_new_dm_volumes() {
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local volume
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# Filter comments and blank lines
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grep -v -e '^[[:space:]]*\(#\|$\)' /etc/dmtab | \
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awk '{ print $1 }' | \
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uniq | \
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while read volume ; do
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# If it exists, skip it
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dmvolume_exists "${volume%:}" && continue
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echo "${volume%:}"
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done
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return 0
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}
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# int dmvolume_exists(volume)
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#
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# Return true if volume exists in DM table
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dmvolume_exists() {
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local x line volume=$1
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[ -z "${volume}" ] && return 1
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/sbin/dmsetup ls 2>/dev/null | \
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while read line ; do
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for x in ${line} ; do
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# the following conditonal return only breaks out
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# of the while loop, as it is running in a pipe.
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[ "${x}" = "${volume}" ] && return 1
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# We only want to check the volume name
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break
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done
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done
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# if 1 was returned from the above loop, then indicate that
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# volume exists
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[ $? = 1 ] && return 0
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# otherwise the loop exited normally and the volume does not
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# exist
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return 1
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}
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# int is_empty_dm_volume(volume)
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#
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# Return true if the volume exists in DM table, but is empty/non-valid
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is_empty_dm_volume() {
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local table volume=$1
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set -- $(/sbin/dmsetup table 2>/dev/null | grep -e "^${volume}:")
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[ "${volume}" = "$1" -a -z "$2" ]
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}
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start() {
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if [ -e /proc/modules ] && ! dm_in_proc ; then
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modprobe dm-mod 2>/dev/null
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fi
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# Ensure the dirs exist for locking and running
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checkpath -q -d -m 0700 -o root:root /run/lvm /run/lock/lvm
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local x volume
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if [ -x /sbin/dmsetup -a -c /dev/mapper/control -a -f /etc/dmtab ] ; then
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[ -n "$(get_new_dm_volumes)" ] && \
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einfo " Setting up device-mapper volumes:"
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get_new_dm_volumes | \
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while read x ; do
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[ -n "${x}" ] || continue
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volume="${x##* }"
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ebegin " Creating volume: ${volume}"
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if ! eval $(build_dmsetup_command ${volume}) >/dev/null 2>/dev/null ; then
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eend 1 " Error creating volume: ${volume}"
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# dmsetup still adds an empty volume in some cases,
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# so lets remove it
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is_empty_dm_volume "${volume}" && \
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/sbin/dmsetup remove "${volume}" 2>/dev/null
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else
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eend 0
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fi
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done
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fi
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}
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