[2118] | 1 | #!/usr/bin/perl -w
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| 2 | #
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[2149] | 3 | # Mindi subroutines related to LVM brought by the MondoRescue project
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[2118] | 4 | #
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| 5 | # $Id$
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| 6 | #
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| 7 | # Copyright B. Cornec 2008
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| 8 | # Provided under the GPL v2
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| 9 |
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[2149] | 10 | package MondoRescue::Mindi::LVM;
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[2118] | 11 |
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| 12 | use strict 'vars';
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| 13 | use Data::Dumper;
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| 14 | use English;
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| 15 | use lib qw (lib);
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| 16 | use ProjectBuilder::Base;
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| 17 | use ProjectBuilder::Conf;
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| 18 |
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| 19 | # Inherit from the "Exporter" module which handles exporting functions.
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| 20 |
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| 21 | use Exporter;
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| 22 |
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| 23 | # Export, by default, all the functions into the namespace of
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| 24 | # any code which uses this module.
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| 25 |
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| 26 | our @ISA = qw(Exporter);
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[2149] | 27 | our @EXPORT = qw(mr_lvm_check mr_lvm_analyze mr_lvm_prepare);
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[2118] | 28 |
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| 29 | =pod
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| 30 |
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| 31 | =head1 NAME
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| 32 |
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| 33 | MondoRescue::Mindi, part of the mondorescue.org
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| 34 |
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| 35 | =head1 DESCRIPTION
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| 36 |
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| 37 | This modules provides low level functions for the Mindi part of the Mondorescue project
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| 38 |
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| 39 | =head1 USAGE
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| 40 |
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| 41 | =over 4
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| 42 |
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| 43 | =item B<mr_lvm_check>
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| 44 |
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| 45 | This function checks the usage of LVM and gets the version used
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| 46 | It returns 2 parameters, the LVM version, and the lvm command to use if needed
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[2149] | 47 | If LVM version is null then no LVM Handling should be done.
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[2118] | 48 |
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| 49 | =cut
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| 50 |
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| 51 | sub mr_lvm_check {
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| 52 |
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[2149] | 53 | # Get params from the conf file
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| 54 | my ($lvmds_t,$lvmproc_t,$lvmcmd_t,$lvmpath_t) = pb_conf_get("mr_lvmdiskscan","mr_lvmprocfile","mr_lvmcmd","mr_lvmpath");
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| 55 | my $lvmds = $lvmds_t->{'mindi'};
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| 56 | my $lvmproc = $lvmproc_t->{'mindi'};
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| 57 | my $lvmcmd = $lvmcmd_t->{'mindi'};
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| 58 | my $lvmpath = $lvmpath_t->{'mindi'};
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[2118] | 59 |
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[2149] | 60 | if (! -x $lvmproc) {
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| 61 | pb_log(1,"$lvmproc doesn't exist.");
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| 62 | return(0,undef);
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| 63 | }
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[2118] | 64 |
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| 65 | # Check LVM volumes presence
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| 66 | open(LVM,$lvmproc) || mr_exit(-1,"Unable to open $lvmproc");
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| 67 | while (<LVM>) {
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[2149] | 68 | if (/0 VGs 0 PVs 0 LVs/) {
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| 69 | pb_log(1,"No LVM volumes found in $lvmproc");
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| 70 | return(0,undef);
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| 71 | }
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[2118] | 72 | }
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| 73 | close(LVM);
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| 74 |
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| 75 | # Check LVM version
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| 76 | my $lvmver=0;
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| 77 | if (-x $lvmds ) {
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| 78 | open(LVM,"$lvmds --help 2>&1 |") || mr_exit(-1,"Unable to execute $lvmds");
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| 79 | while (<LVM>) {
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| 80 | if (/Logical Volume Manager/ || /LVM version:/) {
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| 81 | $lvmver = $_;
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| 82 | $lvmver =~ s/:([0-9])\..*/$1/;
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| 83 | }
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| 84 | }
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| 85 | }
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| 86 | close(LVM);
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| 87 |
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| 88 | if ($lvmver == 0) {
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| 89 | # Still not found
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| 90 | if (-x $lvmcmd) {
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| 91 | open(LVM,"$lvmcmd version |") || mr_exit(-1,"Unable to execute $lvmcmd");
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| 92 | while (<LVM>) {
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| 93 | if (/LVM version/) {
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| 94 | $lvmver = $_;
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| 95 | $lvmver =~ s/LVM version ([0-9])\..*/$1/;
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| 96 | }
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| 97 | }
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| 98 | close(LVM);
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| 99 | }
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| 100 | }
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| 101 |
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| 102 | if ($lvmver == 0) {
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| 103 | # Still not found
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[2149] | 104 | mr_exit(-1,"Unable to determine LVM version.\nPlease report to the dev team with the result of the commands\n$lvmds and $lvmcmd");
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[2118] | 105 | } elsif ($lvmver == 1) {
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[2149] | 106 | $lvmcmd = "$lvmpath";
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| 107 | } elsif ($lvmver == 2) {
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| 108 | $lvmcmd .= " ";
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| 109 | } else {
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| 110 | pb_log(0,"Unknown LVM version $lvmver");
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[2118] | 111 | }
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[2149] | 112 | # Here $lvmcmd contains a full path name
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[2118] | 113 | pb_log(1,"Found LVM version $lvmver");
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| 114 | return ($lvmver,$lvmcmd);
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| 115 |
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| 116 | }
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| 117 |
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[2149] | 118 | =over 4
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| 119 |
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| 120 | =item B<mr_lvm_analyze>
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| 121 |
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| 122 | This function outputs in a file descriptor the LVM analysis done
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| 123 | It returns 1 parameters, the LVM version or 0 if no LVM
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| 124 |
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| 125 | =cut
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| 126 |
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| 127 | sub mr_lvm_analyze {
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| 128 |
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| 129 | my $OUTPUT = shift;
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| 130 |
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| 131 | my ($lvmver,$lvmcmd) = mr_lvm_check();
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| 132 | return(0) if ($lvmver == 0);
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| 133 |
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| 134 | print $OUTPUT "LVM:$lvmver";
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| 135 |
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| 136 | # Analyze the existing physical volumes
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| 137 | open(LVM,$lvmcmd."pvdisplay -c |") || mr_exit(-1,"Unable to execute ".$lvmcmd."pvdisplay -c");
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| 138 | while (<LVM>) {
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| 139 | print $OUTPUT "PV:$_";
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| 140 | }
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| 141 | close(LVM);
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| 142 |
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| 143 | # Analyze the existing volume groups
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| 144 | open(LVM,$lvmcmd."vgdisplay -c |") || mr_exit(-1,"Unable to execute ".$lvmcmd."vgdisplay -c");
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| 145 | while (<LVM>) {
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| 146 | print $OUTPUT "VG:$_";
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| 147 | }
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| 148 | close(LVM);
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| 149 |
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| 150 | # Analyze the existing logical volumes
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| 151 | open(LVM,$lvmcmd."lvdisplay -c |") || mr_exit(-1,"Unable to execute ".$lvmcmd."lvdisplay -c");
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| 152 | while (<LVM>) {
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| 153 | print $OUTPUT "LV:$_";
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| 154 | }
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| 155 | close(LVM);
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| 156 | return($lvmver);
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| 157 | }
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| 158 |
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| 159 |
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| 160 | =over 4
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| 161 |
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| 162 | =item B<mr_lvm_prepare>
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| 163 |
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| 164 | This function outputs in a file descriptor the LVM setup needed to restore LVM conf
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| 165 | It returns 1 parameters, the LVM version or 0 if no LVM
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| 166 |
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| 167 | =cut
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| 168 |
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| 169 | sub mr_lvm_prepare {
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| 170 |
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| 171 | my $INPUT = shift;
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| 172 | my $OUTPUT = shift;
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| 173 | my $mrmult = shift;
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| 174 |
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| 175 | my ($lvmver,$lvmcmd) = mr_lvm_check();
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| 176 |
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| 177 | # Generate the startup scrit needed to restore LVM conf
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| 178 | # from what is given on input
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| 179 | # Multiply by the multiplier given in input or 1 of none
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| 180 |
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| 181 | print $OUTPUT "# Desactivate Volume Groups\n";
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| 182 | print $OUTPUT $lvmcmd."vgchange -an\n";
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| 183 | print $OUTPUT "\n";
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| 184 |
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| 185 | my $firsttime = 0;
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| 186 | while (<$INPUT>) {
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| 187 | if (/^PV:/) {
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| 188 | my ($tag,$pvname,$vgname,$pvsize,$ipvn,$pvstat,$pvna,$lvnum,$pesize,$petot,$pefree,$pelloc) = split(/:/);
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| 189 | print $OUTPUT "# Creating Physical Volumes $pvname\n";
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| 190 | print $OUTPUT $lvmcmd."pvcreate -ff -y -s ".$pesize*$mrmult." $pvname\n";
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| 191 | print $OUTPUT "\n";
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| 192 | } elsif (/^VG:/) {
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| 193 | my ($tag,$vgname,$vgaccess,$vgstat,$vgnum,$lvmaxnum,$lvnum,$ocalvinvg,$lvmaxsize,$pvmaxnum,$cnumpv,$anumpv,$vgsize,$pesize,$penum,$pealloc,$pefree,$uuid) = split(/:/);
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| 194 | if ($lvmver < 2) {
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| 195 | print $OUTPUT "# Removing device first as LVM v1 doesn't do it\n";
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| 196 | print $OUTPUT "rm -Rf /dev/$vgname\n";
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| 197 | }
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| 198 | $lvmaxnum = 255 if ($lvmaxnum > 256);
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| 199 | $pvmaxnum = 255 if ($pvmaxnum > 256);
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| 200 | print $OUTPUT "# Create Volume Group $vgname\n";
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| 201 | # Pb sur pesize unite ?
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| 202 | print $OUTPUT $lvmcmd."vgcreate $vgname -p $pvmaxnum -s $pesize -l $lvmaxnum\n";
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| 203 | print $OUTPUT "\n";
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| 204 | } elsif (/^LV:/) {
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| 205 | if ($firsttime eq 0) {
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| 206 | print $OUTPUT "\n";
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| 207 | print $OUTPUT "# Activate All Volume Groups\n";
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| 208 | print $OUTPUT $lvmcmd."vgchange -ay\n";
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| 209 | print $OUTPUT "\n";
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| 210 | $firsttime = 1;
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| 211 | }
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| 212 | my ($tag,$lvname,$vgname,$lvaccess,$lvstat,$lvnum,$oclv,$lvsize,$leinlv,$lealloc,$allocpol,$readahead,$major,$minor) = split(/:/);
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| 213 | print $OUTPUT "# Create Logical Volume $lvname\n";
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| 214 | print $OUTPUT $lvmcmd."lvcreate -n $lvname -L ".$lvsize*$mrmult." -r $readahead $vgname\n";
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| 215 | #[ "$stripes" ] && output="$output -i $stripes"
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| 216 | #[ "$stripesize" ] && output="$output -I $stripesize"
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| 217 | }
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| 218 | }
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| 219 | print $OUTPUT "\n";
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| 220 | print $OUTPUT "# Scanning again Volume Groups\n";
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| 221 | print $OUTPUT $lvmcmd."vgscan\n";
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| 222 | print $OUTPUT "\n";
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| 223 |
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| 224 | }
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| 225 |
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[2118] | 226 | =back
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| 227 |
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| 228 | =head1 WEB SITES
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| 229 |
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| 230 | The main Web site of the project is available at L<http://www.mondorescue.org/>. Bug reports should be filled using the trac instance of the project at L<http://trac.mondorescue.org/>.
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| 231 |
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| 232 | =head1 USER MAILING LIST
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| 233 |
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| 234 | The mailing list of the project is available at L<mailto:mondo@lists.sf.net>
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| 235 |
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| 236 | =head1 AUTHORS
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| 237 |
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| 238 | The Mondorescue.org team L<http://www.mondorescue.org/> lead by Bruno Cornec L<mailto:bruno@mondorescue.org>.
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| 239 |
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| 240 | =head1 COPYRIGHT
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| 241 |
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| 242 | This module is distributed under the GPL v2.0 license
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| 243 | described in the file C<COPYING> included with the distribution.
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| 244 |
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| 245 |
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| 246 | =cut
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| 247 |
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| 248 | 1;
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| 249 |
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