source: MondoRescue/branches/2.2.10/mindi/analyze-my-lvm @ 2351

Last change on this file since 2351 was 2351, checked in by Bruno Cornec, 11 years ago
  • Replacement of some fgets by mr_getline to allow for dyn. memory management.
  • Backport of SElinux fix from 2.2.9
  • Property svn:keywords set to Id
File size: 8.1 KB
Line 
1#!/bin/bash
2#
3# $Id: analyze-my-lvm 2351 2009-08-28 00:41:30Z bruno $
4#
5
6Die() {
7    echo "$1" >> /dev/stderr
8    exit -1
9}
10
11
12
13GetValueFromField() {
14    local res
15    sed s/'    '/~/ "$1" | tr -s ' ' ' ' | sed s/'~ '/'~'/ | grep -i "$2~" | cut -d'~' -f2,3,4,5 | tr '~' ' ' | gawk '{ if ($2=="MB") {printf "%dm",$1;} else if ($2=="KB") {printf "%dk",$1;} else if ($2=="GB") {printf "%fg",$1;} else {print $0;};}'
16}
17
18
19GetLastBit() {
20    local i res
21    i=20
22    res=""
23    while [ ! "$res" ] ; do
24        i=$(($i-1))
25        res=`echo "$1" | cut -d'/' -f$i`
26    done
27    echo "$res"
28}
29
30
31ProcessLogicalVolume() {
32    local LV_full_string fname logical_volume volume_group device
33    LV_full_string=$1
34    if [ ! -e "$1" ]; then
35        echo "WARNING - cannot find LV file $1" | tee -a /dev/stderr
36        return
37    fi
38    volume_group=`echo "$LV_full_string" | cut -d'/' -f3`
39    logical_volume=`echo "$LV_full_string" | cut -d'/' -f4`
40    if [ $lvmversion = 2 ]; then
41        device=$LV_full_string
42        params=`GenerateLvcreateParameters $device`
43    else
44        fname=/proc/lvm/VGs/$volume_group/LVs/$logical_volume
45        if [ ! -e "$fname" ] ; then
46            echo "WARNING - cannot find $volume_group's $logical_volume LV file" | tee -a /dev/stderr
47            return
48        else
49            device=`GetValueFromField $fname "name:"`
50            params=`GenerateLvcreateParameters $device`
51        fi
52    fi
53    echo "# $LVMCMD lvcreate$params -n $logical_volume $volume_group"
54}
55
56
57GenerateLvcreateParameters() {
58    local device stripes stripesize device fname allocation output readahead
59    fname=$MINDI_TMP/PLF.$$.txt
60    device=$1
61    output=""
62    $LVMCMD lvdisplay $device > $fname
63    stripes=`GetValueFromField $fname "Stripes"`
64    stripesize=`GetValueFromField $fname "Stripe size (MByte)"`m
65    [ "$stripesize" = "m" ] && stripesize=`GetValueFromField $fname "Stripe size (KByte)"`k
66    [ "$stripesize" = "k" ] && stripesize=""
67    allocation=`GetValueFromField $fname "LV Size"`
68    [ ! "`echo "$allocation" | grep "[k,m,g]"`" ] && allocation="$allocation"m
69    if echo "$allocation" | grep -E '^.*g$' > /dev/null 2> /dev/null ; then
70        val=`echo "$allocation" | sed s/g//`
71        allocation=`echo "$val" | awk '{c=$1; printf "%d", c*1024;}'`m
72    fi
73    readahead=`GetValueFromField $fname "Read ahead sectors"`
74    rm -f $fname
75    [ "$stripes" ]    && output="$output -i $stripes"
76    [ "$stripesize" ] && output="$output -I $stripesize"
77    [ "$allocation" ] && output="$output -L $allocation"
78    [ "$readahead" ]  && output="$output -r $readahead"
79    echo "$output"
80}
81
82
83
84GenerateVgcreateParameters() {
85    local current_VG device fname incoming VG_info_file max_logical_volumes max_physical_volumes physical_extent_size output blanklines
86    current_VG=$1
87    VG_info_file=$MINDI_TMP/$$.vg-info.txt
88    # We use cat here as a way to avoid SElinux to prevent us from writing in $VG_info_file
89    $LVMCMD vgdisplay $current_VG | cat > $VG_info_file
90    max_logical_volumes=`GetValueFromField "$VG_info_file" "MAX LV"`
91    [ $max_logical_volumes -ge 256 ] && max_logical_volumes=255
92    max_physical_volumes=`GetValueFromField "$VG_info_file" "MAX PV"`
93    [ $max_physical_volumes -ge 256 ] && max_physical_volumes=255
94    physical_extent_size=`GetValueFromField "$VG_info_file" "PE Size"`
95    output=""
96    [ "$max_logical_volumes" ]  && output="$output -l $max_logical_volumes"
97    [ "$max_physical_volumes" ] && output="$output -p $max_physical_volumes"
98    [ "$physical_extent_size" ] && output="$output -s $physical_extent_size"
99    echo "$output"
100    rm -f $VG_info_file
101}
102
103
104
105
106
107ProcessVolumeGroup() {
108    local current_VG physical_volumes i list_of_devices VG_params
109    current_VG=$1
110    if [ $lvmversion = 2 ]; then
111        VG_params=`GenerateVgcreateParameters $current_VG`
112        list_of_devices=`$LVMCMD pvs | grep " $current_VG " | awk '{print $1}'`
113    else
114        info_file=/proc/lvm/VGs/$current_VG/group
115        physical_volumes=`ls /proc/lvm/VGs/$current_VG/PVs`
116        VG_params=`GenerateVgcreateParameters $current_VG`
117        list_of_devices=""
118        for i in $physical_volumes ; do
119            fname=/proc/lvm/VGs/$current_VG/PVs/$i
120            device=`GetValueFromField $fname "name:"`
121            list_of_devices="$list_of_devices $device"
122        done
123    fi
124    l=""
125    if [ -f /etc/multipath.conf ]; then
126        # If multipath check which type of devidec are given, mpath prefered
127        for d in $list_of_devices; do
128            l="$l `GiveMapperOfdm $d`"
129        done
130        list_of_devices=$l
131    fi
132
133    echo "# $LVMCMD vgcreate $current_VG$VG_params $list_of_devices"
134    echo "# $LVMCMD vgchange -a y $current_VG"
135}
136
137
138
139ListAllPhysicalVolumes() {
140    if [ $lvmversion = 2 ]; then
141        $LVMCMD pvscan 2> /dev/null | grep 'PV' | awk '{print $2}' >  $MINDI_TMP/pv.tmp
142    else
143        pvscan 2> /dev/null | grep '"' | cut -d'"' -f2  >  $MINDI_TMP/pv.tmp
144    fi
145    if [ -f /etc/multipath.conf ]; then
146        # If multipath check which type of devidec are given, mpath prefered
147        for d in `cat  $MINDI_TMP/pv.tmp`; do
148            GiveMapperOfdm $d
149        done
150    else
151        cat $MINDI_TMP/pv.tmp
152    fi
153    rm -f $MINDI_TMP/pv.tmp
154}
155
156
157ListAllVolumeGroups() {
158    $LVMCMD vgdisplay 2> /dev/null | awk '/^ *VG Name/ {print $3;}'
159}
160
161GiveMapperOfdm () {
162
163major=`stat -c "%t" $1`
164minor=`stat -c "%T" $1`
165
166for i in `ls /dev/mapper/*`; do
167    mj=`stat -c "%t" $i`
168    mn=`stat -c "%T" $i`
169    if [ "$mj" = "$major" ] && [ "$mn" = "$minor" ]; then
170        echo "$i"
171        return
172    fi
173done
174echo $1
175}
176
177
178ListLvmDrivesAndPartitions() {
179    $LVMCMD vgdisplay -v 2> /dev/null | grep "PV Name" | sed 's/(#)//' | awk '{print $3}' > $MINDI_TMP/vg.tmp
180    if [ -f /etc/multipath.conf ]; then
181        # If multipath check which type of devidec are given, mpath prefered
182        for d in `cat  $MINDI_TMP/vg.tmp`; do
183            GiveMapperOfdm $d
184        done
185    else
186        cat $MINDI_TMP/vg.tmp
187    fi
188    rm -f $MINDI_TMP/vg.tmp
189}
190
191
192
193PrettifyList() {
194    local i
195    echo -en "$1"
196    for i in $2 ; do
197        echo -en "$i "
198    done
199    echo ""
200}
201
202
203ListAllLogicalVolumes() {
204    if [ $lvmversion = 2 ]; then
205        $LVMCMD lvscan 2> /dev/null | grep "'" | grep -iw "ACTIVE" | cut -d"'" -f2
206    else
207        lvscan 2> /dev/null | grep '"' | grep -iw "ACTIVE" | cut -d'"' -f2
208    fi
209}
210
211
212
213WriteShutdownScript() {
214    local i
215    echo ""
216    echo "Finally, to shut down and delete the volumes, do this:-"
217    for i in `ListAllLogicalVolumes` ; do
218        echo "($LVMCMD lvremove -f $i)"
219    done
220    for i in `ListAllVolumeGroups` ; do
221        echo "($LVMCMD vgchange -a n $i)"
222    done
223    for i in `ListAllVolumeGroups` ; do
224        echo "($LVMCMD vgremove $i)"
225    done
226    if [ $lvmversion = 2 ]; then
227        echo "(rmmod dm-mod & rmmod dm_mod & )"
228    else
229        echo "(rmmod lvm-mod)"
230    fi
231}
232
233
234
235# -------------------------------- main -----------------------------------
236which lvmdiskscan 2>/dev/null 2>&1 || Die "lvmdiskscan not found. Won't handle LVM."
237if [ -e "/proc/lvm/global" ] && [ "`tr -s '\t' ' ' < /proc/lvm/global | grep "0 VGs 0 PVs 0 LVs"`" != "" ]; then
238    exit 1
239fi
240
241# Older lvmdiskscan use --help, newer --version
242lvmopt="--help"
243lvmdiskscan $lvmopt 2>&1 | grep -q -- "--version"
244if [ $? -eq 0 ]; then
245    lvmopt="--version"
246fi
247
248
249lvmversion=`lvmdiskscan --help 2>&1 |
250  grep -E "Logical Volume Manager|LVM version:" |
251  cut -d: -f2 | cut -d. -f1 |
252  awk '{print $NF}' |
253  sed -e 's/ //g'`
254
255if which lvm 2>/dev/null; then
256    version=`lvm version | grep "LVM version" | awk '{print $3}'`
257    i="`echo "$version" | cut -d'.' -f1`"
258    echo "i=$i"
259    if [ "$i" -ge "2" ] ; then
260        lvmversion=2
261    fi
262fi
263
264if [ $lvmversion = 2 ]; then
265    echo "LVM version >= 2.0 found."
266    LVMCMD="lvm"
267else
268    LVMCMD=""
269fi
270
271all_lvm_drives_and_partitions=`ListLvmDrivesAndPartitions`
272echo "Just before you extrapolate mountlist to include RAID partitions,"
273echo "extrapolate it to include the following LVM drives and partitions:-"
274PrettifyList ">>>>> " "$all_lvm_drives_and_partitions"
275echo "To get started, type:-"
276if [ $lvmversion = 2 ]; then
277    echo "(insmod dm-mod)"
278    echo "(insmod dm_mod)"
279else
280    echo "(insmod lvm-mod)"
281fi
282echo "# $LVMCMD vgchange -an"
283for i in `ListAllPhysicalVolumes` ; do
284    echo "# echo y | $LVMCMD pvcreate -ff $i"
285done
286echo "# $LVMCMD vgscan"
287echo ""
288echo "Create and activate the VG's (volume groups)."
289all_volume_groups=`ListAllVolumeGroups`
290for current_VG in $all_volume_groups ; do
291    if [ $lvmversion -ne 2 ]; then
292        echo "# rm -Rf /dev/$current_VG"
293    fi
294    ProcessVolumeGroup $current_VG
295done
296echo ""
297echo "Finally, create the LV's (logical volumes)."
298all_logical_volumes=`ListAllLogicalVolumes`
299for current_LV in $all_logical_volumes ; do
300    ProcessLogicalVolume $current_LV
301done
302echo ""
303echo "# $LVMCMD vgscan"
304echo "Now you may format the LV's:-"
305for i in `ListAllLogicalVolumes` ; do
306    echo "(mkfs -t foo $i or something like that)"
307done
308WriteShutdownScript
309exit 0
310
311
312
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