291 lines
7.2 KiB
Bash
291 lines
7.2 KiB
Bash
#!/bin/sh
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#
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# dmraid-activate: Script to reformat the output of dmraid to be useful with
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# udev.
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#
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# (c) 2008 Canonical Ltd.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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# Arguments: $1 = Name of array you want activated.
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activate_array ()
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{
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Raid_Setinfo=$(dmraid -i -si "$1")
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if [ -z "$Raid_Setinfo" ]; then
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log_error "Cannot retrieve RAID set information for $1"
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return 1
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fi
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Raid_Type=$(dmraid -i -si -ct "$1")
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Raid_Nodevs=$(dmraid -i -si -cd "$1")
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case "$Raid_Type" in
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stripe)
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if [ "$Raid_Nodevs" -lt 2 ]; then
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if [ -n "$Degraded" ]; then
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log_error "Cannot bring up a RAID0 array in degraded mode, not all devices present."
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fi
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return 2
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fi
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;;
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mirror)
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if [ "$Raid_Nodevs" -lt 2 ]; then
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if [ -z "$Degraded" ]; then
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log_error "Raid set $Raid_Name is degraded. Not activating"
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return 2
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else
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log_warning "Activating $Raid_Name in degraded mode"
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Return_Val=3
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fi
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fi
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;;
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raid5_*)
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modprobe -q dm_raid45
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if [ "$Raid_Nodevs" -lt 3 ]; then
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if [ -z "$Degraded" ]; then
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log_error "Raid set $Raid_Name is degraded. Not activating"
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return 2
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else
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log_warning "Activating $Raid_Name in degraded mode"
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Return_Val=3
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fi
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fi
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;;
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esac
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# At this point we have the required number of devs, or the user wants the
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# array brought up in degraded mode, except in the case of striped arrays.
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# We need to know the root device for determining if the -Z flag can be used
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# (see #533848 and LP: 392510)
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if [ -z "$ROOT" ]; then
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for x in $(cat /proc/cmdline); do
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case $x in
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root=*)
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ROOT=${x#root=}
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;;
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esac
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done
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case "$ROOT" in
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LABEL=*)
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ROOT=$(readlink -f /dev/disk/by-uuid/${ROOT#LABEL=})
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;;
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UUID=*)
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ROOT=$(readlink -f /dev/disk/by-uuid/${ROOT#UUID=})
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;;
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esac
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else
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ROOT=$(readlink -f $ROOT)
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fi
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if (echo $ROOT | grep -q $1) ; then
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dmraid -i -ay -Z "$1"
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else
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dmraid -i -ay "$1"
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fi
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return $Return_Val
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}
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log_warning()
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{
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if type logger > /dev/null ; then
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logger -t dmraid-activate "WARNING: $1"
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else
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echo "dmraid-activate: WARNING: $1"
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fi
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}
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log_error()
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{
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if type logger > /dev/null ; then
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logger -t dmraid-activate "ERROR: $1"
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else
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echo "dmraid-activate: ERROR: $1"
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fi
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}
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ddf1_virtual_drive_names()
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{
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ddf1_awk_script="$(cat <<'EOF'
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BEGIN {
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section = ""
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disk_ref = ""
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guid_i = 0
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# Heximal to decimal conversion array
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for (i = 0; i <= 9; i++) hex2dec[i] = i
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hex2dec["a"] = 10; hex2dec["b"] = 11; hex2dec["c"] = 12
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hex2dec["e"] = 13; hex2dec["d"] = 14; hex2dec["f"] = 15;
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}
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function section_begins(name)
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{
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section = name
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vd_guid = ""
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drive_map = 0
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}
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function extract_vd_guid(line, g)
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{
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g = substr(line, match(line,/\[[0-9a-f ]+\]$/)+1, RLENGTH-2)
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gsub(/ /, "", g)
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# IF LSI, do timestamp substitution to get persistent name, see
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# 19_ddf1_lsi_persistent_name.patch
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if (g ~ /^4c5349/)
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g = substr(g, 1, 32) "47114711" substr(g, 41)
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return g
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}
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function extract_vd_name(line, hex, n, max, i, d1, d2, sed)
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{
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n = tolower(substr(line, match(line,/\[[0-9a-f ]+\]$/)+1, RLENGTH-2))
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max = split(n, hex, / /)
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if (max <= 0 || hex[0] == "00") return ""
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# Convert name from hex to string (16 bytes)
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n = ""
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for (i = 1; i <= max; i++) {
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d1 = hex2dec[substr(hex[i], 1, 1)]
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d2 = hex2dec[substr(hex[i], 2, 1)]
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if ((d1 + d2) == 0) break
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n = n sprintf("%c", d1 * 16 + d2)
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}
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# Shell-escape single quotes in the name
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gsub(/'/,"'\\''", n)
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# Finally strip non-graph chars from the end of the string
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# mawk does not support character classes. Use sed.
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sed = "echo '" n "' | sed 's/[^[:graph:]]\+$//'"
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sed | getline n
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close(sed)
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return n
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}
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{
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if (!/^0x/ && / at /) {
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# Section begins
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section_begins(substr($0, 1, match($0, / at /)-1))
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} else if (section == "Disk Data" && /^0x020 reference:[ \t]*[0-9A-Fx]+/) {
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disk_ref = $3
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sub(/^0x/, "", disk_ref)
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} else if (disk_ref) {
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# We need to parse 'Virtual Drive' sections in order to extract VD
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# names
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if (section == "Virtual Drive") {
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if (/^0x000 guid:/) {
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vd_guid = extract_vd_guid($0)
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} else if (/^0x030 name:/) {
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vd_name = extract_vd_name($0)
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if (vd_name)
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vd_names[vd_guid] = vd_name
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}
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} else if (section == "Virtual Drive Config Record") {
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if (/^0x008 guid:/) {
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vd_guid = extract_vd_guid($0)
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} else if (drive_map) {
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# 0: 4BCBB980 @ 0
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if ($2 == disk_ref) {
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guids[guid_i] = vd_guid
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guid_i++
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}
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} else if (vd_guid) {
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drive_map = /^Drive map:/
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}
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}
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}
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}
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END {
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# Print discovered virtual drive names (or GUIDs) which belong to this
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# physical drive
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for (guid_i in guids) {
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guid = guids[guid_i]
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if (guid in vd_names) {
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print vd_names[guid]
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} else {
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print guid
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}
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}
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}
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EOF
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)"
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dmraid -i -n "$1" | awk "$ddf1_awk_script"
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}
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if grep -qs "\<nodmraid\>" /proc/cmdline; then
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log_warning "dmraid disabled by boot option"
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exit 0
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fi
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modprobe -q dm_mod
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if [ -z "$1" ] || [ "$1" = "--degraded" ] && [ "$#" -lt 2 ]; then
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echo "Node name not specified." >&2
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exit 1
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fi
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if [ "$1" = "--degraded" ]; then
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Degraded=1
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Node_Name=$2
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else
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Node_Name=$1
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fi
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Raid_Name=$(dmraid -i -r -cr /dev/$Node_Name | grep -vi "No RAID disks" | grep -vi "formats discovered")
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if [ -z "$Raid_Name" ]; then
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exit 0
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fi
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newline="
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"
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case "$Raid_Name" in
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isw_*)
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# We need a special case for isw arrays, since it is possible to have several
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# subsets of a RAID group, of varying RAID types.
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Isw_Group_Name=$Raid_Name
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Isw_Subsets=$(dmraid -i -n "/dev/$Node_Name" | grep volume | sed 's/.*volume: " *\(.*\)"$/\1/')
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for isw_subset in $Isw_Subsets
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do
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activate_array "${Isw_Group_Name}_${isw_subset}"
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done
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break
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;;
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.ddf1_disks)
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# Dummy name for the main DDF1 group. Needs special handling to
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# find RAID subsets (name or GUID) for this physical drive
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Ddf1_names=`ddf1_virtual_drive_names "/dev/$Node_Name"`
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# Returned names might contain space characters. Therefore
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# split fields at new line. Use $IFS to avoid forking a new shell
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save_IFS="$IFS"
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IFS="$newline"
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for ddf1_name in $Ddf1_names
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do
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IFS="$save_IFS"
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activate_array "ddf1_${ddf1_name}"
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IFS="$newline"
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done
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IFS="$save_IFS"
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break
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;;
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*)
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activate_array "$Raid_Name"
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break
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;;
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esac
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exit $Return_Val
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