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67aa84bd ER |
1 | #!/bin/sh |
2 | # | |
3 | # geninitrd mod: LVM | |
6e49b0b1 | 4 | USE_LVM=${USE_LVM:-yes} |
67aa84bd ER |
5 | |
6 | # if we should init LVM at boot | |
7 | have_lvm=no | |
8 | ||
9 | # LVM volumes that are needed to activate | |
10 | # VG for root dev | |
11 | # @internal | |
12 | ROOTVG="" | |
13 | ||
14 | # VG for suspend resume dev | |
15 | SUSPENDVG="" | |
16 | ||
17 | VGVOLUMES="" | |
18 | ||
f0ef5219 ER |
19 | # LVM version. Autodetected if not set. |
20 | # Values: 1|2 | |
21 | LVMTOOLSVERSION= | |
22 | ||
67aa84bd ER |
23 | # LVM devices that should not be included in vgscan on initrd. |
24 | # @internal | |
25 | lvm_ignore_devices='' | |
26 | ||
c124d0cf ER |
27 | # setup geninitrd module |
28 | # @access public | |
29 | setup_mod_lvm() { | |
30 | lvm=$(find_tool $initrd_dir/lvm /sbin/initrd-lvm) | |
c124d0cf | 31 | |
728b5283 | 32 | if [ ! -x "$lvm" ]; then |
6e49b0b1 ER |
33 | USE_LVM=no |
34 | fi | |
35 | ||
36 | if is_yes "$USE_LVM" && [ -z "$LVMTOOLSVERSION" ]; then | |
37 | LVMTOOLSVERSION=$(LC_ALL=C $lvm vgchange --version 2>/dev/null | awk '/LVM version:/{if ($3 >= 2) print "2"}') | |
c124d0cf | 38 | if [ -z "$LVMTOOLSVERSION" ]; then |
074b295e | 39 | die "Can't determine LVM tools version (is /sys mounted?). Please set LVMTOOLSVERSION and rerun $PROGRAM." |
c124d0cf ER |
40 | fi |
41 | fi | |
42 | } | |
43 | ||
67aa84bd ER |
44 | # return true if node is lvm node |
45 | # @param string $node device node to be examined | |
46 | # @access public | |
47 | is_lvm() { | |
48 | local node="$1" | |
49 | ||
50 | # LVM not wanted | |
51 | if is_no "$USE_LVM"; then | |
52 | return 1 | |
53 | fi | |
54 | ||
55 | if [ ! -e "$node" ]; then | |
56 | die "check_lvm(): node $node doesn't exist!" | |
57 | return 1 | |
58 | fi | |
59 | ||
60 | # block-major-58 is lvm1 | |
61 | ls -lL "$node" 2> /dev/null | awk '{if (/^b/) { if ($5 == "58,") { exit 0; } else { exit 1; } } else { exit 1; }}' | |
62 | rc=$? | |
63 | ||
64 | if [ $rc = 0 ]; then | |
65 | # is lvm1 | |
66 | return 0 | |
67 | fi | |
68 | ||
728b5283 | 69 | $lvm lvdisplay "$node" > /dev/null 2>&1 |
67aa84bd ER |
70 | rc=$? |
71 | if [ $rc -gt 127 ]; then | |
72 | # lvdisplay terminated by signal! most likely it segfaulted. | |
73 | die "Unexpected exit from 'lvdisplay $node': $rc - are your lvm tools broken?" | |
74 | fi | |
75 | ||
76 | return $rc | |
77 | } | |
78 | ||
79 | # find modules for $devpath | |
80 | # @param $devpath device to be examined | |
81 | # @access public | |
82 | find_modules_lvm() { | |
83 | local devpath="$1" | |
84 | ||
85 | debug "LVM: $devpath is LVM node" | |
86 | ||
67aa84bd ER |
87 | local vg=$(find_lvm_vg "$devpath") |
88 | debug "LVM VG for $devpath: $vg" | |
89 | VGVOLUMES=$(echo $VGVOLUMES $vg | tr ' ' '\n' | sort -u) | |
90 | ||
91 | local pv=$(find_lvm_pv "$vg") | |
92 | debug "LVM PV for $vg: $pv" | |
93 | PVDEVICES=$(echo $PVDEVICES $pv | tr ' ' '\n' | sort -u) | |
94 | ||
95 | if [ -n "$PVDEVICES" ]; then | |
96 | for device in $PVDEVICES; do | |
97 | find_modules_for_devpath $device | |
98 | done | |
99 | else | |
728b5283 | 100 | die "I wasn't able to find PV. You can try to set PVDEVICES in /etc/sysconfig/geninitrd." |
67aa84bd ER |
101 | fi |
102 | ||
103 | if [ "$LVMTOOLSVERSION" = "2" ]; then | |
b02a6b13 | 104 | find_module "-dm-mod" |
67aa84bd | 105 | elif [ "$LVMTOOLSVERSION" = "1" ]; then |
b02a6b13 ER |
106 | find_module "-lvm" |
107 | find_module "-lvm-mod" | |
67aa84bd | 108 | else |
f0ef5219 | 109 | die "LVM version $LVMTOOLSVERSION is not supported." |
67aa84bd ER |
110 | fi |
111 | ||
112 | debug "LVM v$LVMTOOLSVERSION enabled" | |
113 | have_lvm=yes | |
114 | } | |
115 | ||
116 | ||
117 | # generate initrd fragment for lvm | |
118 | # @access public | |
119 | initrd_gen_lvm() { | |
1b481849 ER |
120 | if ! is_yes "$have_lvm"; then |
121 | return | |
122 | fi | |
123 | ||
67aa84bd ER |
124 | debug "Adding LVM support to initrd" |
125 | inst_d /tmp /newroot | |
684d5d2a | 126 | inst_exec $lvm /bin/lvm.static |
67aa84bd ER |
127 | |
128 | # always make /dev on tmpfs for LVM2 | |
129 | if [ "$LVMTOOLSVERSION" = "2" ]; then | |
130 | mount_dev | |
131 | fi | |
132 | ||
133 | if ! is_yes "$dev_mounted"; then | |
134 | inst_d /dev/mapper | |
135 | mknod $DESTDIR/dev/mapper/control c 10 63 | |
136 | for device in $PVDEVICES; do | |
137 | # if LVM on RAID then device might be copied already in gen_md | |
138 | [ -e "$DESTDIR/dev/$(basename $device)" ] && continue | |
139 | inst $device /dev | |
140 | done | |
141 | fi | |
142 | ||
143 | mount_tmp | |
7170bd62 | 144 | mount_sys |
67aa84bd ER |
145 | if [ "$LVMTOOLSVERSION" = "1" ]; then |
146 | add_linuxrc <<-EOF | |
147 | lvm vgscan -T | |
148 | for vg in $VGVOLUMES; do | |
149 | lvm vgchange -T -a y $vg | |
150 | done | |
151 | EOF | |
152 | else | |
153 | echo "cat /etc/lvm.conf > /tmp/lvm.conf" | add_linuxrc | |
154 | echo "global {" > "$DESTDIR/etc/lvm.conf" | |
155 | echo " locking_type = 0" >> "$DESTDIR/etc/lvm.conf" | |
156 | echo " locking_dir = \"/tmp\"" >> "$DESTDIR/etc/lvm.conf" | |
157 | echo "}" >> "$DESTDIR/etc/lvm.conf" | |
158 | echo "devices {" >> "$DESTDIR/etc/lvm.conf" | |
159 | echo " sysfs_scan=0" >> "$DESTDIR/etc/lvm.conf" | |
160 | if is_yes "$have_md"; then | |
161 | echo " md_component_detection = 1" >> "$DESTDIR/etc/lvm.conf" | |
162 | fi | |
163 | if is_yes "$have_dmraid" || is_yes "$have_multipath"; then | |
164 | echo ' types = [ "device-mapper", 254 ]' >> "$DESTDIR/etc/lvm.conf" | |
165 | fi | |
166 | if [ "$lvm_ignore_devices" ]; then | |
167 | # TODO: think of merging with lvm dumpconfig output | |
168 | echo ' filter = [' >> "$DESTDIR/etc/lvm.conf" | |
169 | local dev | |
170 | for dev in $lvm_ignore_devices; do | |
171 | debug "LVM v2: ignore device $dev" | |
172 | printf ' "r|^%s.*|",\n' $dev | |
173 | done >> "$DESTDIR/etc/lvm.conf" | |
174 | echo ']' >> "$DESTDIR/etc/lvm.conf" | |
175 | fi | |
176 | # XXX filter= must be on one line! | |
728b5283 | 177 | $lvm dumpconfig | awk '/filter=/' >> "$DESTDIR/etc/lvm.conf" |
67aa84bd ER |
178 | echo "}" >> "$DESTDIR/etc/lvm.conf" |
179 | ||
180 | initrd_gen_devices | |
181 | ||
182 | add_linuxrc <<-EOF | |
183 | export ROOTDEV=$rootdev | |
184 | export ROOTVG="$VGVOLUMES" | |
185 | export SUSPENDVG=$SUSPENDVG | |
186 | EOF | |
57f48d51 ER |
187 | |
188 | # need awk for "s/--/-/g" subst when parsing kernel root commandline | |
189 | busybox_applet awk | |
67aa84bd ER |
190 | add_linuxrc <<-'EOF' |
191 | # parse rootdev from kernel commandline if it begins with / | |
192 | case "$ROOT" in | |
193 | /*) | |
2ade15a8 | 194 | |
57f48d51 | 195 | # rewrite: |
ea8d931d | 196 | # /dev/mapper/sys-rootfs -> /dev/sys/rootfs |
57f48d51 | 197 | # /dev/mapper/blodnatt-blah--bleh -> /dev/blodnatt/blah-bleh |
ea8d931d | 198 | # /dev/mapper/vg--meaw-root -> /dev/vg-meaw/root |
2ade15a8 ER |
199 | case "$ROOT" in |
200 | /dev/mapper/*-*) | |
ea8d931d ER |
201 | # change "--" to / (as "/" is impossible in LV name) |
202 | local dev=$(awk -vdev="${ROOT#/dev/mapper/}" 'BEGIN{gsub(/--/, "/", dev); print dev}') | |
203 | local VG=$(awk -vdev="$dev" 'BEGIN{split(dev, v, "-"); gsub("/", "-", v[1]); print v[1]}') | |
204 | local LV=$(awk -vdev="$dev" 'BEGIN{split(dev, v, "-"); gsub("/", "-", v[2]); print v[2]}') | |
2ade15a8 ER |
205 | ROOT=/dev/$VG/$LV |
206 | ;; | |
207 | esac | |
208 | ||
67aa84bd ER |
209 | if [ "$ROOT" != "$ROOTDEV" ]; then |
210 | ROOTDEV=$ROOT | |
2ade15a8 | 211 | |
67aa84bd ER |
212 | echo "LVM: Using 'root=$ROOTDEV' from kernel commandline" |
213 | local tmp=${ROOTDEV#/dev/} | |
214 | if [ "$tmp" != "$ROOTDEV" ]; then | |
215 | ROOTVG=${tmp%/*} | |
216 | echo "LVM: Using Volume Group '$ROOTVG' for rootfs" | |
217 | fi | |
218 | fi | |
219 | ;; | |
220 | esac | |
221 | ||
222 | # skip duplicate VG | |
223 | if [ "$SUSPENDVG" = "$ROOTVG" ]; then | |
224 | export VGVOLUMES="$ROOTVG" | |
225 | else | |
226 | export VGVOLUMES="$SUSPENDVG $ROOTVG" | |
227 | fi | |
228 | ||
229 | # disable noise from LVM accessing devices that aren't ready. | |
230 | read printk < /proc/sys/kernel/printk | |
231 | if [ ! "$DEBUGINITRD" ]; then | |
232 | echo 0 > /proc/sys/kernel/printk | |
233 | fi | |
234 | ||
235 | export LVM_SYSTEM_DIR=/tmp | |
236 | : 'Scanning for Volume Groups' | |
237 | lvm.static vgscan --mknodes --ignorelockingfailure 2>/dev/null | |
238 | ||
239 | : 'Activating Volume Groups' | |
240 | for vol in $VGVOLUMES; do | |
241 | lvm.static vgchange --ignorelockingfailure -a y $vol 2>/dev/null | |
242 | done | |
243 | ||
244 | echo "$printk" > /proc/sys/kernel/printk | |
245 | ||
246 | # Find out major/minor | |
247 | attrs="$(lvm.static lvdisplay --ignorelockingfailure -c $ROOTDEV 2>/dev/null)" | |
248 | if [ "$attrs" ]; then | |
249 | majmin="${attrs#*$ROOTDEV*:*:*:*:*:*:*:*:*:*:*:*}" | |
250 | if [ "$majmin" != "$attrs" ]; then | |
251 | major="${majmin%:*}" | |
252 | minor="${majmin#*:}" | |
253 | fi | |
254 | fi | |
255 | ||
256 | if [ "$major" -a "$minor" ]; then | |
257 | # Pass it to kernel | |
258 | echo $((256 * $major + $minor)) > /proc/sys/kernel/real-root-dev | |
67aa84bd ER |
259 | fi |
260 | EOF | |
261 | fi | |
262 | } | |
263 | ||
264 | ||
265 | # PRIVATE METHODS | |
266 | ||
267 | # find PV names from given VG name | |
268 | # @param string $vg Volume Group name | |
269 | # @access private | |
270 | find_lvm_pv() { | |
271 | local vg="$1" | |
272 | ||
728b5283 | 273 | local pv=$($lvm vgs --noheadings -o pv_name "$vg") |
67aa84bd ER |
274 | echo $pv |
275 | } | |
276 | ||
277 | # find VG name from given devnode | |
278 | # @param string $devnode device node to be examined | |
279 | # @access private | |
280 | find_lvm_vg() { | |
281 | local devnode="$1" | |
282 | ||
728b5283 | 283 | local vg=$($lvm lvs --noheadings -o vg_name "$devnode") |
67aa84bd ER |
284 | echo $vg |
285 | } |