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c3b54060 ER |
1 | #!/bin/sh |
2 | # | |
3 | # geninitrd mod: dm-multipath | |
6e49b0b1 | 4 | USE_MULTIPATH=${USE_MULTIPATH:-yes} |
c3b54060 ER |
5 | |
6 | # if we should init dm-multipath at boot | |
7 | have_multipath=no | |
8 | ||
c3b54060 ER |
9 | # dm-multipath wwid which is used for rootfs |
10 | MPATH_WWID= | |
11 | ||
c124d0cf ER |
12 | # setup geninitrd module |
13 | # @access public | |
14 | setup_mod_multipath() { | |
6e49b0b1 | 15 | if [ ! -x /sbin/multipath ]; then |
c124d0cf ER |
16 | USE_MULTIPATH=no |
17 | fi | |
18 | } | |
19 | ||
c3b54060 ER |
20 | # return true if node is multipath controlled |
21 | # @param string $node device node to be examined | |
22 | # @access public | |
23 | is_multipath() { | |
24 | local devpath="$1" | |
25 | ||
26 | # multipath disabled | |
ecd7bf46 | 27 | if is_no "$USE_MULTIPATH"; then |
c3b54060 ER |
28 | return 1 |
29 | fi | |
30 | ||
31 | # multipath nodes are under device mapper | |
32 | if [[ "$devpath" != /dev/mapper/* ]]; then | |
33 | return 1 | |
34 | fi | |
35 | ||
36 | DM_NAME= | |
37 | eval $(dm_export "$devpath") | |
38 | if [ -z "$DM_NAME" ]; then | |
5d51e3e9 | 39 | die "Couldn't extract DM_NAME from $devpath" |
c3b54060 ER |
40 | fi |
41 | ||
42 | local MPATH_WWID=${DM_UUID##*-} | |
e2c75552 ER |
43 | |
44 | # just check if it is valid. | |
c3b54060 ER |
45 | local info=$(multipath -l $MPATH_WWID) |
46 | if [ -z "$info" ]; then | |
47 | return 1 | |
48 | fi | |
49 | ||
50 | return 0 | |
51 | } | |
52 | ||
53 | # find modules for $devpath | |
54 | # @param $devpath device to be examined | |
55 | # @access public | |
56 | # find dm-multipath modules for $devpath | |
57 | # returns false if $devpath is not dm-multipath | |
58 | find_modules_multipath() { | |
59 | local devpath="$1" | |
60 | ||
61 | DM_NAME= | |
62 | eval $(dm_export "$devpath") | |
63 | if [ -z "$DM_NAME" ]; then | |
ecd7bf46 | 64 | die "Couldn't extract DM_NAME from $devpath" |
c3b54060 ER |
65 | fi |
66 | ||
67 | # Partition: | |
68 | # DM_NAME=LUN-28p1 | |
69 | # DM_UUID=part1-mpath-36006016002c11800a0aa05fbfae0db11 | |
70 | # Disk: | |
71 | # DM_NAME=LUN-28 | |
72 | # DM_UUID=mpath-36006016002c11800a0aa05fbfae0db11 | |
73 | MPATH_WWID=${DM_UUID##*-} | |
74 | ||
75 | local info=$(multipath -l $MPATH_WWID) | |
76 | if [ -z "$info" ]; then | |
77 | return 1 | |
78 | fi | |
79 | ||
80 | debug "Finding modules for dm-multipath (WWID=$MPATH_WWID)" | |
81 | have_multipath=yes | |
e2c75552 ER |
82 | |
83 | local p list | |
84 | list=$(mp_parse_devs "$info") | |
85 | for p in $list; do | |
86 | find_modules_for_devpath $p | |
87 | lvm_ignore_devices="$lvm_ignore_devices $p" | |
c3b54060 ER |
88 | done |
89 | ||
ddc299f5 | 90 | list=$(mp_parse_hwhandler "$info") |
e2c75552 | 91 | for p in $list; do |
ddc299f5 | 92 | find_module "$p" |
c3b54060 ER |
93 | done |
94 | ||
e2c75552 ER |
95 | list=$(mp_parse_policy "$info") |
96 | for p in $list; do | |
97 | find_module "dm-$p" | |
c3b54060 ER |
98 | done |
99 | ||
b02a6b13 | 100 | find_module "dm-mod" |
c3b54060 ER |
101 | return 0 |
102 | } | |
103 | ||
104 | # generate initrd fragment | |
105 | # @access public | |
106 | initrd_gen_multipath() { | |
107 | inst_d /sbin /lib/udev /etc/multipath | |
108 | inst_exec /sbin/kpartx /sbin | |
109 | inst_exec /sbin/multipath /sbin | |
110 | ||
111 | # for udev callouts | |
07de5194 | 112 | local scsi_id=$(find_tool /$_lib/udev/scsi_id /lib/udev/scsi_id /sbin/scsi_id) |
e2c75552 ER |
113 | inst_exec $scsi_id /lib/udev |
114 | ||
c1a60691 ER |
115 | if [ -d /$_lib/multipath ]; then |
116 | inst_d /$_lib/multipath | |
117 | inst_exec /$_lib/multipath/* /$_lib/multipath | |
e2c75552 ER |
118 | else |
119 | inst_exec /sbin/mpath* /sbin | |
120 | fi | |
121 | ||
c3b54060 ER |
122 | egrep -v '^([ ]*$|#)' /etc/multipath.conf > $DESTDIR/etc/multipath.conf |
123 | ||
124 | if [ -f /etc/multipath/bindings ]; then | |
125 | egrep -v '^([ ]*$|#)' /etc/multipath/bindings > $DESTDIR/etc/multipath/bindings | |
126 | else | |
127 | touch $DESTDIR/etc/multipath/bindings | |
128 | fi | |
129 | ||
130 | mount_dev | |
131 | initrd_gen_devices | |
132 | ||
133 | mount_sys | |
134 | echo "export MPATH_WWID=$MPATH_WWID" | add_linuxrc | |
135 | add_linuxrc <<-'EOF' | |
136 | # parse mpath_wwid= from kernel commandline | |
137 | for arg in $CMDLINE; do | |
138 | if [ "${arg##mpath_wwid=}" != "${arg}" ]; then | |
139 | MPATH_WWID=${arg##mpath_wwid=} | |
140 | if [ "$MPATH_WWID" = "*" ]; then | |
141 | # '*' would mean activate all WWID-s | |
142 | MPATH_WWID= | |
143 | echo "multipath: Activating all WWID-s" | |
144 | else | |
145 | echo "multipath: Activating WWID=$WWID" | |
146 | fi | |
147 | fi | |
148 | done | |
149 | ||
150 | debugshell | |
151 | /sbin/multipath -v 0 $MPATH_WWID | |
152 | ||
153 | for a in /dev/mapper/*; do | |
154 | [ $a = /dev/mapper/control ] && continue | |
155 | /sbin/kpartx -a -p p $a | |
156 | done | |
157 | debugshell | |
158 | EOF | |
159 | } | |
6ae2e4d0 ER |
160 | |
161 | ||
162 | # PRIVATE METHODS | |
163 | # export info from dmsetup | |
164 | # param can be: | |
165 | # - MAJOR:MINOR | |
166 | # - /dev/dm-MINOR | |
167 | # - /dev/mapper/DM_NAME | |
168 | dm_export() { | |
169 | local arg="$1" | |
170 | ||
171 | case "$arg" in | |
172 | *:*) | |
173 | local maj=${arg%:*} min=${arg#*:} | |
174 | dmsetup -j $maj -m $min export | |
175 | ;; | |
176 | /dev/dm-*) | |
177 | local min=${arg#*dm-} | |
178 | local maj=$(awk '$2 == "device-mapper" {print $1}' /proc/devices) | |
179 | dm_export $maj:$min | |
180 | ;; | |
181 | /dev/mapper/*) | |
182 | local dm_name=${arg#/dev/mapper/} | |
183 | dmsetup export $dm_name | |
184 | ;; | |
185 | *) | |
186 | die "dm_export: unexpected $arg" | |
187 | ;; | |
188 | esac | |
189 | } | |
190 | ||
e2c75552 ER |
191 | # parse blockdevices behind multipath device |
192 | # takes 'multipath -l' output as input | |
193 | mp_parse_devs() { | |
194 | local info="$1" | |
195 | ||
196 | # parse "0:0:1:0 sdf" -> /dev/sdf | |
197 | # | |
198 | # multipath-tools-0.4.8-0.12.amd64 | |
199 | # LUN-02 (36006016002c11800ce520d27c6ebda11) dm-0 DGC ,RAID 10 | |
200 | # [size=12G][features=1 queue_if_no_path][hwhandler=1 emc] | |
201 | # \_ round-robin 0 [prio=0][active] | |
202 | # \_ 0:0:0:0 sda 8:0 [active][undef] | |
203 | # \_ round-robin 0 [prio=0][enabled] | |
204 | # \_ 0:0:1:0 sdf 8:80 [active][undef] | |
205 | # | |
206 | # multipath-tools-0.4.8-9.x86_64 | |
207 | # LUN-14 (36006016002c118006f4f8bccc7fada11) dm-3 , | |
208 | # size=7.0G features='0' hwhandler='0' wp=rw | |
209 | # |-+- policy='round-robin 0' prio=-1 status=enabled | |
210 | # | `- #:#:#:# sde 8:64 failed undef running | |
211 | # `-+- policy='round-robin 0' prio=-1 status=active | |
212 | # `- #:#:#:# sdb 8:16 active undef running | |
213 | ||
214 | echo "$info" | awk '{ | |
215 | if (match($0, /[#0-9]+:[#0-9]+:[#0-9]+:[#0-9]+ [^ ]+ [0-9]+:[0-9]/)) { | |
216 | # take whole matched part into "l" variable | |
217 | l = substr($0, RSTART, RLENGTH); | |
218 | split(l, a, " "); | |
219 | printf("/dev/%s\n", a[2]) | |
220 | } | |
221 | }' | |
222 | } | |
223 | ||
224 | # parse policy output for each device | |
225 | # takes 'multipath -l' output as input | |
226 | mp_parse_policy() { | |
227 | local info="$1" | |
228 | ||
229 | # multipath-tools-0.4.8-0.12.amd64 | |
230 | # LUN-02 (36006016002c11800ce520d27c6ebda11) dm-0 DGC ,RAID 10 | |
231 | # [size=12G][features=1 queue_if_no_path][hwhandler=1 emc] | |
232 | # \_ round-robin 0 [prio=0][active] | |
233 | # \_ 0:0:0:0 sda 8:0 [active][undef] | |
234 | # \_ round-robin 0 [prio=0][enabled] | |
235 | # \_ 0:0:1:0 sdf 8:80 [active][undef] | |
236 | # | |
237 | # multipath-tools-0.4.8-9.x86_64 | |
238 | # LUN-14 (36006016002c118006f4f8bccc7fada11) dm-3 , | |
239 | # size=7.0G features='0' hwhandler='0' wp=rw | |
240 | # |-+- policy='round-robin 0' prio=-1 status=enabled | |
241 | # | `- #:#:#:# sde 8:64 failed undef running | |
242 | # `-+- policy='round-robin 0' prio=-1 status=active | |
243 | # `- #:#:#:# sdb 8:16 active undef running | |
244 | ||
245 | echo "$info" | awk ' | |
246 | # multipath-tools-0.4.8-0.12.amd64 | |
247 | /\[prio=/{ | |
248 | print $2 | |
249 | } | |
250 | # multipath-tools-0.4.8-9.x86_64 | |
251 | /policy=/{ | |
252 | if (match($0, /policy=[^ ]+/)) { | |
253 | # take whole matched part into "l" variable | |
254 | l = substr($0, RSTART, RLENGTH); | |
255 | # remove policy= and single quote, | |
256 | # which we can not use in this awk inline script, therefore the %c hack | |
257 | sub(sprintf("^policy=%c?", 39), "", l); | |
258 | print l | |
259 | } | |
260 | } | |
261 | ' | sort -u | |
262 | } | |
ddc299f5 ER |
263 | |
264 | # parse hwhandler from multipath output | |
265 | # takes 'multipath -l' output as input | |
266 | mp_parse_hwhandler() { | |
267 | local info="$1" | |
268 | ||
269 | # TODO: actually the dm-emc vs scsi-dh-emc is dependant on kernel version | |
270 | # not version of the tools installed | |
271 | ||
272 | # multipath-tools-0.4.8-0.12.amd64 | |
273 | # [size=12G][features=1 queue_if_no_path][hwhandler=1 emc] | |
274 | # | |
275 | # multipath-tools-0.4.8-11.x86_64 | |
276 | # size=7.0G features='0' hwhandler='0' wp=rw | |
277 | # size=2.0G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw | |
278 | echo "$info" | sed -ne " | |
9802850b ER |
279 | # multipath-tools-0.4.8-0.12.amd64 |
280 | /\[hwhandler=1/{ | |
281 | s,^.*\[hwhandler=1 \([^]]*\)\].*$,dm-\1, | |
282 | p | |
283 | } | |
ddc299f5 | 284 | # multipath-tools-0.4.8-11.x86_64 |
9802850b ER |
285 | /hwhandler='1/{ |
286 | s,^.*hwhandler='1 \([^']*\)'.*$,scsi-dh-\1, | |
287 | p | |
288 | } | |
289 | " | sort -u | |
ddc299f5 | 290 | } |