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67aa84bd ER |
1 | #!/bin/sh |
2 | # | |
3 | # geninitrd mod: LVM | |
4 | ||
5 | # if we should init LVM at boot | |
6 | have_lvm=no | |
7 | ||
8 | # LVM volumes that are needed to activate | |
9 | # VG for root dev | |
10 | # @internal | |
11 | ROOTVG="" | |
12 | ||
13 | # VG for suspend resume dev | |
14 | SUSPENDVG="" | |
15 | ||
16 | VGVOLUMES="" | |
17 | ||
f0ef5219 ER |
18 | # LVM version. Autodetected if not set. |
19 | # Values: 1|2 | |
20 | LVMTOOLSVERSION= | |
21 | ||
67aa84bd ER |
22 | # LVM devices that should not be included in vgscan on initrd. |
23 | # @internal | |
24 | lvm_ignore_devices='' | |
25 | ||
c124d0cf ER |
26 | # setup geninitrd module |
27 | # @access public | |
28 | setup_mod_lvm() { | |
29 | lvm=$(find_tool $initrd_dir/lvm /sbin/initrd-lvm) | |
30 | if [ -x /sbin/lvm -a -x "$lvm" ]; then | |
31 | USE_LVM=yes | |
c124d0cf | 32 | |
c124d0cf | 33 | if [ -z "$LVMTOOLSVERSION" ]; then |
0a05c720 ER |
34 | LVMTOOLSVERSION=$(LC_ALL=C $lvm vgchange --version 2>/dev/null | awk '/LVM version:/{if ($3 >= 2) print "2"}') |
35 | if [ -z "$LVMTOOLSVERSION" ]; then | |
36 | die "Can't determine LVM tools version. Please set LVMTOOLSVERSION and rerun $PROGRAM." | |
37 | fi | |
c124d0cf | 38 | fi |
0a05c720 ER |
39 | else |
40 | USE_LVM=no | |
c124d0cf ER |
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 [ $rc = 0 ]; then | |
65 | # is lvm1 | |
66 | return 0 | |
67 | fi | |
68 | ||
69 | /sbin/lvm lvdisplay "$node" > /dev/null 2>&1 | |
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 $device | |
98 | done | |
99 | else | |
100 | die "I wasn't able to find PV (via lvdisplay and pvdisplay). You can try to set PVDEVICES in /etc/sysconfig/geninitrd." | |
101 | fi | |
102 | ||
103 | if [ "$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() { | |
120 | debug "Adding LVM support to initrd" | |
121 | inst_d /tmp /newroot | |
684d5d2a | 122 | inst_exec $lvm /bin/lvm.static |
67aa84bd ER |
123 | |
124 | # always make /dev on tmpfs for LVM2 | |
125 | if [ "$LVMTOOLSVERSION" = "2" ]; then | |
126 | mount_dev | |
127 | fi | |
128 | ||
129 | if ! is_yes "$dev_mounted"; then | |
130 | inst_d /dev/mapper | |
131 | mknod $DESTDIR/dev/mapper/control c 10 63 | |
132 | for device in $PVDEVICES; do | |
133 | # if LVM on RAID then device might be copied already in gen_md | |
134 | [ -e "$DESTDIR/dev/$(basename $device)" ] && continue | |
135 | inst $device /dev | |
136 | done | |
137 | fi | |
138 | ||
139 | mount_tmp | |
140 | if [ "$LVMTOOLSVERSION" = "1" ]; then | |
141 | add_linuxrc <<-EOF | |
142 | lvm vgscan -T | |
143 | for vg in $VGVOLUMES; do | |
144 | lvm vgchange -T -a y $vg | |
145 | done | |
146 | EOF | |
147 | else | |
148 | echo "cat /etc/lvm.conf > /tmp/lvm.conf" | add_linuxrc | |
149 | echo "global {" > "$DESTDIR/etc/lvm.conf" | |
150 | echo " locking_type = 0" >> "$DESTDIR/etc/lvm.conf" | |
151 | echo " locking_dir = \"/tmp\"" >> "$DESTDIR/etc/lvm.conf" | |
152 | echo "}" >> "$DESTDIR/etc/lvm.conf" | |
153 | echo "devices {" >> "$DESTDIR/etc/lvm.conf" | |
154 | echo " sysfs_scan=0" >> "$DESTDIR/etc/lvm.conf" | |
155 | if is_yes "$have_md"; then | |
156 | echo " md_component_detection = 1" >> "$DESTDIR/etc/lvm.conf" | |
157 | fi | |
158 | if is_yes "$have_dmraid" || is_yes "$have_multipath"; then | |
159 | echo ' types = [ "device-mapper", 254 ]' >> "$DESTDIR/etc/lvm.conf" | |
160 | fi | |
161 | if [ "$lvm_ignore_devices" ]; then | |
162 | # TODO: think of merging with lvm dumpconfig output | |
163 | echo ' filter = [' >> "$DESTDIR/etc/lvm.conf" | |
164 | local dev | |
165 | for dev in $lvm_ignore_devices; do | |
166 | debug "LVM v2: ignore device $dev" | |
167 | printf ' "r|^%s.*|",\n' $dev | |
168 | done >> "$DESTDIR/etc/lvm.conf" | |
169 | echo ']' >> "$DESTDIR/etc/lvm.conf" | |
170 | fi | |
171 | # XXX filter= must be on one line! | |
172 | lvm dumpconfig | awk '/filter=/' >> "$DESTDIR/etc/lvm.conf" | |
173 | echo "}" >> "$DESTDIR/etc/lvm.conf" | |
174 | ||
175 | initrd_gen_devices | |
176 | ||
177 | add_linuxrc <<-EOF | |
178 | export ROOTDEV=$rootdev | |
179 | export ROOTVG="$VGVOLUMES" | |
180 | export SUSPENDVG=$SUSPENDVG | |
181 | EOF | |
182 | add_linuxrc <<-'EOF' | |
183 | # parse rootdev from kernel commandline if it begins with / | |
184 | case "$ROOT" in | |
185 | /*) | |
186 | if [ "$ROOT" != "$ROOTDEV" ]; then | |
187 | ROOTDEV=$ROOT | |
188 | echo "LVM: Using 'root=$ROOTDEV' from kernel commandline" | |
189 | local tmp=${ROOTDEV#/dev/} | |
190 | if [ "$tmp" != "$ROOTDEV" ]; then | |
191 | ROOTVG=${tmp%/*} | |
192 | echo "LVM: Using Volume Group '$ROOTVG' for rootfs" | |
193 | fi | |
194 | fi | |
195 | ;; | |
196 | esac | |
197 | ||
198 | # skip duplicate VG | |
199 | if [ "$SUSPENDVG" = "$ROOTVG" ]; then | |
200 | export VGVOLUMES="$ROOTVG" | |
201 | else | |
202 | export VGVOLUMES="$SUSPENDVG $ROOTVG" | |
203 | fi | |
204 | ||
205 | # disable noise from LVM accessing devices that aren't ready. | |
206 | read printk < /proc/sys/kernel/printk | |
207 | if [ ! "$DEBUGINITRD" ]; then | |
208 | echo 0 > /proc/sys/kernel/printk | |
209 | fi | |
210 | ||
211 | export LVM_SYSTEM_DIR=/tmp | |
212 | : 'Scanning for Volume Groups' | |
213 | lvm.static vgscan --mknodes --ignorelockingfailure 2>/dev/null | |
214 | ||
215 | : 'Activating Volume Groups' | |
216 | for vol in $VGVOLUMES; do | |
217 | lvm.static vgchange --ignorelockingfailure -a y $vol 2>/dev/null | |
218 | done | |
219 | ||
220 | echo "$printk" > /proc/sys/kernel/printk | |
221 | ||
222 | # Find out major/minor | |
223 | attrs="$(lvm.static lvdisplay --ignorelockingfailure -c $ROOTDEV 2>/dev/null)" | |
224 | if [ "$attrs" ]; then | |
225 | majmin="${attrs#*$ROOTDEV*:*:*:*:*:*:*:*:*:*:*:*}" | |
226 | if [ "$majmin" != "$attrs" ]; then | |
227 | major="${majmin%:*}" | |
228 | minor="${majmin#*:}" | |
229 | fi | |
230 | fi | |
231 | ||
232 | if [ "$major" -a "$minor" ]; then | |
233 | # Pass it to kernel | |
234 | echo $((256 * $major + $minor)) > /proc/sys/kernel/real-root-dev | |
235 | else | |
236 | echo 2>&1 "Error figuring out real root device for $ROOTDEV!" | |
237 | echo 2>&1 "System will not most likely boot up! So dropping you to a shell!" | |
238 | echo 2>&1 "" | |
239 | sh | |
240 | fi | |
241 | EOF | |
242 | fi | |
243 | } | |
244 | ||
245 | ||
246 | # PRIVATE METHODS | |
247 | ||
248 | # find PV names from given VG name | |
249 | # @param string $vg Volume Group name | |
250 | # @access private | |
251 | find_lvm_pv() { | |
252 | local vg="$1" | |
253 | ||
b034011e | 254 | local pv=$(/sbin/vgs --noheadings -o pv_name "$vg") |
67aa84bd ER |
255 | echo $pv |
256 | } | |
257 | ||
258 | # find VG name from given devnode | |
259 | # @param string $devnode device node to be examined | |
260 | # @access private | |
261 | find_lvm_vg() { | |
262 | local devnode="$1" | |
263 | ||
b034011e | 264 | local vg=$(/sbin/lvs --noheadings -o vg_name "$devnode") |
67aa84bd ER |
265 | echo $vg |
266 | } |