source: branches/2.2.8.selinux/mindi/analyze-my-lvm @ 3332

Last change on this file since 3332 was 2430, checked in by Bruno Cornec, 11 years ago

(Backport from 2.2.9)

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File size: 7.8 KB
Line 
1#!/bin/bash
2#
3# $Id: analyze-my-lvm 2430 2009-09-28 10:08:31Z 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    [ ! -e "$1" ] && Die "Cannot find LV file $1"
35    volume_group=`echo "$LV_full_string" | cut -d'/' -f3`
36    logical_volume=`echo "$LV_full_string" | cut -d'/' -f4`
37    if [ $lvmversion = 2 ]; then
38        device=$LV_full_string
39        params=`GenerateLvcreateParameters $device`
40    else
41        fname=/proc/lvm/VGs/$volume_group/LVs/$logical_volume
42        if [ ! -e "$fname" ] ; then
43            echo "Warning - cannot find $volume_group's $logical_volume LV file"
44        else
45            device=`GetValueFromField $fname "name:"`
46            params=`GenerateLvcreateParameters $device`
47        fi
48    fi
49    echo "# $LVMCMD lvcreate$params -n $logical_volume $volume_group"
50}
51
52
53GenerateLvcreateParameters() {
54    local device stripes stripesize device fname allocation output readahead
55    fname=$MINDI_TMP/PLF.$$.txt
56    device=$1
57    output=""
58    $LVMCMD lvdisplay $device > $fname
59    stripes=`GetValueFromField $fname "Stripes"`
60    stripesize=`GetValueFromField $fname "Stripe size (MByte)"`m
61    [ "$stripesize" = "m" ] && stripesize=`GetValueFromField $fname "Stripe size (KByte)"`k
62    [ "$stripesize" = "k" ] && stripesize=""
63    allocation=`GetValueFromField $fname "LV Size"`
64    [ ! "`echo "$allocation" | grep "[k,m,g]"`" ] && allocation="$allocation"m
65    if echo "$allocation" | grep -E '^.*g$' > /dev/null 2> /dev/null ; then
66        val=`echo "$allocation" | sed s/g//`
67        allocation=`echo "$val" | awk '{c=$1; printf "%d", c*1024;}'`m
68    fi
69    readahead=`GetValueFromField $fname "Read ahead sectors"`
70    rm -f $fname
71    [ "$stripes" ]    && output="$output -i $stripes"
72    [ "$stripesize" ] && output="$output -I $stripesize"
73    [ "$allocation" ] && output="$output -L $allocation"
74    [ "$readahead" ]  && output="$output -r $readahead"
75    echo "$output"
76}
77
78
79
80GenerateVgcreateParameters() {
81    local current_VG device fname incoming VG_info_file max_logical_volumes max_physical_volumes physical_extent_size output blanklines
82    current_VG=$1
83    VG_info_file=$MINDI_TMP/$$.vg-info.txt
84    # We use cat here as a way to avoid SElinux to prevent us from writing in $VG_info_file
85    $LVMCMD vgdisplay $current_VG | cat > $VG_info_file
86    max_logical_volumes=`GetValueFromField "$VG_info_file" "MAX LV"`
87    [ $max_logical_volumes -ge 256 ] && max_logical_volumes=255
88    max_physical_volumes=`GetValueFromField "$VG_info_file" "MAX PV"`
89    [ $max_physical_volumes -ge 256 ] && max_physical_volumes=255
90    physical_extent_size=`GetValueFromField "$VG_info_file" "PE Size"`
91    output=""
92    [ "$max_logical_volumes" ]  && output="$output -l $max_logical_volumes"
93    [ "$max_physical_volumes" ] && output="$output -p $max_physical_volumes"
94    [ "$physical_extent_size" ] && output="$output -s $physical_extent_size"
95    echo "$output"
96    rm -f $VG_info_file
97}
98
99
100
101
102
103ProcessVolumeGroup() {
104    local current_VG physical_volumes i list_of_devices VG_params
105    current_VG=$1
106    if [ $lvmversion = 2 ]; then
107        VG_params=`GenerateVgcreateParameters $current_VG`
108        list_of_devices=`$LVMCMD pvs | grep " $current_VG " | awk '{print $1}'`
109    else
110        info_file=/proc/lvm/VGs/$current_VG/group
111        physical_volumes=`ls /proc/lvm/VGs/$current_VG/PVs`
112        VG_params=`GenerateVgcreateParameters $current_VG`
113        list_of_devices=""
114        for i in $physical_volumes ; do
115            fname=/proc/lvm/VGs/$current_VG/PVs/$i
116            device=`GetValueFromField $fname "name:"`
117            list_of_devices="$list_of_devices $device"
118        done
119    fi
120    l=""
121    if [ -f /etc/multipath.conf ]; then
122        # If multipath check which type of devidec are given, mpath prefered
123        for d in $list_of_devices; do
124            l="$l `GiveMapperOfdm $d`"
125        done
126        list_of_devices=$l
127    fi
128
129    echo "# $LVMCMD vgcreate $current_VG$VG_params $list_of_devices"
130    echo "# $LVMCMD vgchange -a y $current_VG"
131}
132
133
134
135ListAllPhysicalVolumes() {
136    if [ $lvmversion = 2 ]; then
137        $LVMCMD pvscan 2> /dev/null | grep 'PV' | awk '{print $2}' >  $MINDI_TMP/pv.tmp
138    else
139        pvscan 2> /dev/null | grep '"' | cut -d'"' -f2  >  $MINDI_TMP/pv.tmp
140    fi
141    if [ -f /etc/multipath.conf ]; then
142        # If multipath check which type of devidec are given, mpath prefered
143        for d in `cat  $MINDI_TMP/pv.tmp`; do
144            GiveMapperOfdm $d
145        done
146    else
147        cat $MINDI_TMP/pv.tmp
148    fi
149    rm -f $MINDI_TMP/pv.tmp
150}
151
152
153ListAllVolumeGroups() {
154    $LVMCMD vgdisplay 2> /dev/null | awk '/^ *VG Name/ {print $3;}'
155}
156
157GiveMapperOfdm () {
158
159major=`stat -c "%t" $1`
160minor=`stat -c "%T" $1`
161
162for i in `ls /dev/mapper/*`; do
163    mj=`stat -c "%t" $i`
164    mn=`stat -c "%T" $i`
165    if [ "$mj" = "$major" ] && [ "$mn" = "$minor" ]; then
166        echo "$i"
167        return
168    fi
169done
170echo $1
171}
172
173
174ListLvmDrivesAndPartitions() {
175    $LVMCMD vgdisplay -v 2> /dev/null | grep "PV Name" | sed 's/(#)//' | awk '{print $3}' > $MINDI_TMP/vg.tmp
176    if [ -f /etc/multipath.conf ]; then
177        # If multipath check which type of devidec are given, mpath prefered
178        for d in `cat  $MINDI_TMP/vg.tmp`; do
179            GiveMapperOfdm $d
180        done
181    else
182        cat $MINDI_TMP/vg.tmp
183    fi
184    rm -f $MINDI_TMP/vg.tmp
185}
186
187
188
189PrettifyList() {
190    local i
191    echo -en "$1"
192    for i in $2 ; do
193        echo -en "$i "
194    done
195    echo ""
196}
197
198
199ListAllLogicalVolumes() {
200    if [ $lvmversion = 2 ]; then
201        $LVMCMD lvscan 2> /dev/null | grep "'" | cut -d"'" -f2
202    else
203        lvscan 2> /dev/null | grep '"' | cut -d'"' -f2
204    fi
205}
206
207
208
209WriteShutdownScript() {
210    local i
211    echo ""
212    echo "Finally, to shut down and delete the volumes, do this:-"
213    for i in `ListAllLogicalVolumes` ; do
214        echo "($LVMCMD lvremove -f $i)"
215    done
216    for i in `ListAllVolumeGroups` ; do
217        echo "($LVMCMD vgchange -a n $i)"
218    done
219    for i in `ListAllVolumeGroups` ; do
220        echo "($LVMCMD vgremove $i)"
221    done
222    if [ $lvmversion = 2 ]; then
223        echo "(rmmod dm-mod & rmmod dm_mod & )"
224    else
225        echo "(rmmod lvm-mod)"
226    fi
227}
228
229
230
231# -------------------------------- main -----------------------------------
232which lvmdiskscan 2>/dev/null 2>&1 || Die "lvmdiskscan not found. Won't handle LVM."
233if [ -e "/proc/lvm/global" ] && [ "`tr -s '\t' ' ' < /proc/lvm/global | grep "0 VGs 0 PVs 0 LVs"`" != "" ]; then
234    exit 1
235fi
236
237lvmversion=`lvmdiskscan --help 2>&1 |
238  grep -E "Logical Volume Manager|LVM version:" |
239  cut -d: -f2 | cut -d. -f1 |
240  awk '{print $NF}' |
241  sed -e 's/ //g'`
242
243if which lvm 2>/dev/null; then
244    version=`lvm version | grep "LVM version" | awk '{print $3}'`
245    i="`echo "$version" | cut -d'.' -f1`"
246    echo "i=$i"
247    if [ "$i" -ge "2" ] ; then
248        lvmversion=2
249    fi
250fi
251
252if [ $lvmversion = 2 ]; then
253    echo "LVM version >= 2.0 found."
254    LVMCMD="lvm"
255else
256    LVMCMD=""
257fi
258
259all_lvm_drives_and_partitions=`ListLvmDrivesAndPartitions`
260echo "Just before you extrapolate mountlist to include RAID partitions,"
261echo "extrapolate it to include the following LVM drives and partitions:-"
262PrettifyList ">>>>> " "$all_lvm_drives_and_partitions"
263echo "To get started, type:-"
264if [ $lvmversion = 2 ]; then
265    echo "(insmod dm-mod)"
266    echo "(insmod dm_mod)"
267else
268    echo "(insmod lvm-mod)"
269fi
270echo "# $LVMCMD vgchange -an"
271for i in `ListAllPhysicalVolumes` ; do
272    echo "# echo y | $LVMCMD pvcreate -ff $i"
273done
274echo "# $LVMCMD vgscan"
275echo ""
276echo "Create and activate the VG's (volume groups)."
277all_volume_groups=`ListAllVolumeGroups`
278for current_VG in $all_volume_groups ; do
279    if [ $lvmversion -ne 2 ]; then
280        echo "# rm -Rf /dev/$current_VG"
281    fi
282    ProcessVolumeGroup $current_VG
283done
284echo ""
285echo "Finally, create the LV's (logical volumes)."
286all_logical_volumes=`ListAllLogicalVolumes`
287for current_LV in $all_logical_volumes ; do
288    ProcessLogicalVolume $current_LV
289done
290echo ""
291echo "# $LVMCMD vgscan"
292echo "Now you may format the LV's:-"
293for i in `ListAllLogicalVolumes` ; do
294    echo "(mkfs -t foo $i or something like that)"
295done
296WriteShutdownScript
297exit 0
298
299
300
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