1 | #!/bin/sh
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2 | #
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3 | # $Id: analyze-my-lvm 346 2006-01-25 14:43:55Z bcornec $
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4 | #
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5 |
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6 | #------------------------- ANALYZE-MY-LVM ----------------------- Hugo Rabson
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7 | # 07/14
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8 | # - no longer blank first 4k of /dev/mdX
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9 | #
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10 | # 06/14/2004
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11 | # - fixed "n >= 2.00" bug (shell doesn't handle floating points properly)
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12 | # - handle dm_mod as well as dm-mod
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13 | #
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14 | # 02/18/2004
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15 | # - nice patch to fix ListAllVolumeGroups() --- J. Richard
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16 | # - patch to support LVM2 by Takeru Komoriya
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17 | #
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18 | # 10/15/2003
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19 | # - fixed '-L'-handling to allow for floating-point gigabyte values
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20 | #
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21 | # 01/15/2003
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22 | # - patch (LVM) by Brian Borgeson
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23 | #
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24 | # 12/10/2002
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25 | # - patch by Benjamin Mampaey
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26 | #
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27 | # 09/05/2002
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28 | # - additional patch by Ralph Gruwe
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29 | #
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30 | # 08/30/2002
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31 | # - modified by Ralph Gruwe
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32 | #
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33 | # 10/01/2001
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34 | # - last modified by Hugo :)
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35 | #------------------------------------------------------------------------------
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36 |
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37 | Die() {
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38 | echo "$1" >> /dev/stderr
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39 | exit 1
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40 | }
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41 |
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42 |
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43 |
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44 | GetValueFromField() {
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45 | local res
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46 | 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 "%dg",$1;} else {print $0;};}'
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47 | }
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48 |
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49 |
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50 | GetLastBit() {
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51 | local i res
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52 | i=20
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53 | res=""
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54 | while [ ! "$res" ] ; do
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55 | i=$(($i-1))
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56 | res=`echo "$1" | cut -d'/' -f$i`
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57 | done
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58 | echo "$res"
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59 | }
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60 |
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61 |
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62 | ProcessLogicalVolume() {
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63 | local LV_full_string fname logical_volume volume_group device
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64 | LV_full_string=$1
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65 | [ ! -e "$1" ] && Die "Cannot find LV file $1"
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66 | volume_group=`echo "$LV_full_string" | cut -d'/' -f3`
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67 | logical_volume=`echo "$LV_full_string" | cut -d'/' -f4`
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68 | if [ $lvmversion = 2 ]; then
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69 | device=$LV_full_string
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70 | params=`GenerateLvcreateParameters $device`
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71 | else
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72 | fname=/proc/lvm/VGs/$volume_group/LVs/$logical_volume
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73 | if [ ! -e "$fname" ] ; then
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74 | echo "Warning - cannot find $volume_group's $logical_volume LV file"
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75 | else
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76 | device=`GetValueFromField $fname "name:"`
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77 | params=`GenerateLvcreateParameters $device`
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78 | fi
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79 | fi
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80 | echo "# $LVMCMD lvcreate$params -n $logical_volume $volume_group"
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81 | }
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82 |
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83 |
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84 | GenerateLvcreateParameters() {
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85 | local device stripes stripesize device fname allocation output readahead
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86 | fname=/tmp/PLF.$$.txt
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87 | device=$1
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88 | output=""
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89 | $LVMCMD lvdisplay $device > $fname
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90 | stripes=`GetValueFromField $fname "Stripes"`
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91 | stripesize=`GetValueFromField $fname "Stripe size (MByte)"`m
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92 | [ "$stripesize" = "m" ] && stripesize=`GetValueFromField $fname "Stripe size (KByte)"`k
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93 | [ "$stripesize" = "k" ] && stripesize=""
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94 | allocation=`GetValueFromField $fname "LV Size"`
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95 | [ ! "`echo "$allocation" | grep "[k,m,g]"`" ] && allocation="$allocation"m
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96 | if echo "$allocation" | grep -x ".*g" > /dev/null 2> /dev/null ; then
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97 | val=`echo "$allocation" | sed s/g//`
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98 | allocation=`echo "$val" | awk '{c=$1; printf "%d", c*1024;}'`m
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99 | fi
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100 | readahead=`GetValueFromField $fname "Read ahead sectors"`
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101 | rm -f $fname
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102 | [ "$stripes" ] && output="$output -i $stripes"
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103 | [ "$stripesize" ] && output="$output -I $stripesize"
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104 | [ "$allocation" ] && output="$output -L $allocation"
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105 | [ "$readahead" ] && output="$output -r $readahead"
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106 | echo "$output"
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107 | }
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108 |
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109 |
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110 |
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111 | GenerateVgcreateParameters() {
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112 | local current_VG device fname incoming VG_info_file max_logical_volumes max_physical_volumes physical_extent_size output blanklines
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113 | current_VG=$1
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114 | VG_info_file=/tmp/$$.vg-info.txt
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115 | $LVMCMD vgdisplay $current_VG > $VG_info_file
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116 | max_logical_volumes=`GetValueFromField "$VG_info_file" "MAX LV"`
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117 | [ $max_logical_volumes -ge 256 ] && max_logical_volumes=255
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118 | max_physical_volumes=`GetValueFromField "$VG_info_file" "MAX PV"`
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119 | [ $max_physical_volumes -ge 256 ] && max_physical_volumes=255
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120 | physical_extent_size=`GetValueFromField "$VG_info_file" "PE Size"`
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121 | output=""
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122 | [ "$max_logical_volumes" ] && output="$output -l $max_logical_volumes"
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123 | [ "$max_physical_volumes" ] && output="$output -p $max_physical_volumes"
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124 | [ "$physical_extent_size" ] && output="$output -s $physical_extent_size"
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125 | echo "$output"
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126 | rm -f $VG_info_file
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127 | }
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128 |
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129 |
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130 |
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131 |
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132 |
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133 | ProcessVolumeGroup() {
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134 | local current_VG physical_volumes i list_of_devices VG_params
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135 | current_VG=$1
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136 | if [ $lvmversion = 2 ]; then
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137 | VG_params=`GenerateVgcreateParameters $current_VG`
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138 | list_of_devices=`$LVMCMD pvs | grep "$current_VG" | awk '{print $1}'`
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139 | else
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140 | info_file=/proc/lvm/VGs/$current_VG/group
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141 | physical_volumes=`ls /proc/lvm/VGs/$current_VG/PVs`
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142 | VG_params=`GenerateVgcreateParameters $current_VG`
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143 | list_of_devices=""
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144 | for i in $physical_volumes ; do
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145 | fname=/proc/lvm/VGs/$current_VG/PVs/$i
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146 | device=`GetValueFromField $fname "name:"`
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147 | list_of_devices="$list_of_devices $device"
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148 | done
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149 | fi
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150 | echo "# $LVMCMD vgcreate $current_VG$VG_params $list_of_devices"
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151 | echo "# $LVMCMD vgchange -a y $current_VG"
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152 | }
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153 |
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154 |
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155 |
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156 | ListAllPhysicalVolumes() {
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157 | if [ $lvmversion = 2 ]; then
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158 | $LVMCMD pvscan 2> /dev/null | grep 'PV' | awk '{print $2}'
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159 | else
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160 | pvscan 2> /dev/null | grep '"' | cut -d'"' -f2
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161 | fi
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162 | }
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163 |
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164 |
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165 | ListAllVolumeGroups() {
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166 | $LVMCMD vgdisplay 2> /dev/null | awk '/^ *VG Name/ {print $3;}'
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167 | }
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168 |
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169 |
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170 | ListLvmDrivesAndPartitions() {
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171 | $LVMCMD vgdisplay -v |grep "PV Name" | awk '{print $3}'
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172 | }
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173 |
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174 |
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175 |
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176 | PrettifyList() {
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177 | local i
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178 | echo -en "$1"
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179 | for i in $2 ; do
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180 | echo -en "$i "
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181 | done
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182 | echo ""
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183 | }
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184 |
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185 |
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186 | ListAllLogicalVolumes() {
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187 | if [ $lvmversion = 2 ]; then
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188 | $LVMCMD lvscan | grep "'" | cut -d"'" -f2
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189 | else
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190 | lvscan | grep '"' | cut -d'"' -f2
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191 | fi
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192 | }
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193 |
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194 |
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195 |
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196 | WriteShutdownScript() {
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197 | local i
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198 | echo ""
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199 | echo "Finally, to shut down and delete the volumes, do this:-"
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200 | for i in `ListAllLogicalVolumes` ; do
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201 | echo "($LVMCMD lvremove -f $i)"
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202 | done
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203 | for i in `ListAllVolumeGroups` ; do
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204 | echo "($LVMCMD vgchange -a n $i)"
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205 | done
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206 | for i in `ListAllVolumeGroups` ; do
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207 | echo "($LVMCMD vgremove $i)"
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208 | done
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209 | if [ $lvmversion = 2 ]; then
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210 | echo "(rmmod dm-mod & rmmod dm_mod & )"
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211 | else
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212 | echo "(rmmod lvm-mod)"
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213 | fi
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214 | }
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215 |
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216 |
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217 |
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218 | # -------------------------------- main -----------------------------------
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219 | which lvmdiskscan 2>/dev/null 2>&1 || Die "Cannot find lvmdiskscan. Are you sure you're using LVM?"
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220 | if [ -e "/proc/lvm/global" ] && [ "`tr -s '\t' ' ' < /proc/lvm/global | grep "0 VGs 0 PVs 0 LVs"`" != "" ] ; then
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221 | exit 0
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222 | fi
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223 |
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224 | lvmversion=`lvmdiskscan --help 2>&1 |
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225 | grep -E "Logical Volume Manager|LVM version:" |
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226 | cut -d: -f2 | cut -d. -f1 |
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227 | awk '{print $NF}' |
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228 | sed -e 's/ //g'`
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229 |
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230 | if which lvm 2>/dev/null; then
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231 | version=`lvm version | grep "LVM version" | awk '{print $3}'`
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232 | i="`echo "$version" | cut -d'.' -f1`"
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233 | echo "i=$i"
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234 | if [ "$i" -ge "2" ] ; then
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235 | lvmversion=2
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236 | fi
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237 | fi
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238 |
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239 | if [ $lvmversion = 2 ]; then
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240 | echo "LVM version >= 2.0 found."
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241 | LVMCMD="lvm"
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242 | else
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243 | LVMCMD=""
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244 | fi
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245 |
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246 | all_lvm_drives_and_partitions=`ListLvmDrivesAndPartitions`
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247 | echo "Just before you extrapolate mountlist to include RAID partitions,"
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248 | echo "extrapolate it to include the following LVM drives and partitions:-"
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249 | PrettifyList ">>>>> " "$all_lvm_drives_and_partitions"
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250 | echo "To get started, type:-"
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251 | if [ $lvmversion = 2 ]; then
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252 | echo "(insmod dm-mod)"
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253 | echo "(insmod dm_mod)"
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254 | else
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255 | echo "(insmod lvm-mod)"
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256 | fi
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257 | echo "# $LVMCMD vgchange -an"
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258 | for i in `ListAllPhysicalVolumes` ; do
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259 | echo "# echo y | $LVMCMD pvcreate -ff $i"
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260 | done
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261 | echo "# $LVMCMD vgscan; echo"
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262 | echo ""
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263 | echo "Create and activate the VG's (volume groups)."
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264 | all_volume_groups=`ListAllVolumeGroups`
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265 | for current_VG in $all_volume_groups ; do
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266 | if [ $lvmversion -ne 2 ]; then
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267 | echo "# rm -Rf /dev/$current_VG"
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268 | fi
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269 | ProcessVolumeGroup $current_VG
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270 | done
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271 | echo ""
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272 | echo "Finally, create the LV's (logical volumes)."
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273 | all_logical_volumes=`ListAllLogicalVolumes`
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274 | for current_LV in $all_logical_volumes ; do
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275 | ProcessLogicalVolume $current_LV
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276 | done
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277 | echo ""
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278 | echo "# $LVMCMD vgscan"
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279 | echo "Now you may format the LV's:-"
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280 | for i in `ListAllLogicalVolumes` ; do
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281 | echo "(mkfs -t foo $i or something like that)"
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282 | done
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283 | WriteShutdownScript
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284 | exit 0
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285 |
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286 |
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287 |
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