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save_lv.cgi
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save_lv.cgi
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#!/usr/local/bin/perl
# save_lv.cgi
# Create, update or delete a logical volume
require './lvm-lib.pl';
&ReadParse();
@lvs = &list_logical_volumes($in{'vg'});
($vg) = grep { $_->{'name'} eq $in{'vg'} } &list_volume_groups();
$vg || &error($text{'vg_egone'});
if ($in{'lv'}) {
($lv) = grep { $_->{'name'} eq $in{'lv'} } @lvs;
$lv || &error($text{'lv_egone'});
$oldlv = { %$lv };
}
if ($in{'confirm'}) {
# Delete the logical volume
&error_setup($text{'lv_err2'});
$err = &delete_logical_volume($lv);
&error("<pre>$err</pre>") if ($err);
&webmin_log("delete", "lv", $in{'lv'}, $lv);
&redirect("index.cgi?mode=lvs");
}
elsif ($in{'confirm_rollback'}) {
# Rollback the Snapshot
&error_setup($text{'lv_err3'});
$err = &rollback_snapshot($lv);
&error("<pre>$err</pre>") if ($err);
&webmin_log("rollback", "lv", $in{'lv'}, $lv);
&redirect("index.cgi?mode=lvs");
}
elsif ($in{'delete'}) {
# Ask the user if he is sure
&ui_print_header(undef, $text{'lv_delete'}, "");
print "<center>\n";
print &ui_form_start("save_lv.cgi");
print &ui_hidden("vg", $in{'vg'});
print &ui_hidden("lv", $in{'lv'});
print "<b>",&text($lv->{'is_snap'} ? 'lv_rusnap' : 'lv_rusure',
"<tt>$lv->{'device'}</tt>"),"</b><p>\n";
if ($lv->{'thin'}) {
@thinc = grep { $_->{'thin_in'} eq $lv->{'name'} } @lvs;
if (@thinc) {
print "<b>",&text('lv_delthin',
scalar(@thinc)),"</b><p>\n";
}
}
print &ui_form_end([ [ 'confirm', $text{'lv_deleteok'} ] ]);
print "</center>\n";
&ui_print_footer("index.cgi?mode=lvs", $text{'index_return'});
}
elsif ($in{'rollback'}) {
# Ask the user if he is sure
&ui_print_header(undef, $text{'lv_snaprollback'}, "");
print "<center>\n";
print &ui_form_start("save_lv.cgi");
print &ui_hidden("vg", $in{'vg'});
print &ui_hidden("lv", $in{'lv'});
print "<b>",&text('lv_rusnaprb',
"<tt>$lv->{'device'}</tt>"),"</b><p>\n";
print &ui_form_end([ [ 'confirm_rollback', $text{'lv_snaprollbackok'} ] ]);
print "</center>\n";
&ui_print_footer("index.cgi?mode=lvs", $text{'index_return'});
}
else {
# Validate inputs
&error_setup($text{'lv_err'});
$in{'name'} =~ /^[A-Za-z0-9\.\-\_]+$/ || &error($text{'lv_ename'});
($same) = grep { $_->{'name'} eq $in{'name'} }
&list_logical_volumes($in{'vg'});
$same && (!$in{'lv'} || $in{'lv'} ne $in{'name'}) &&
&error($text{'lv_esame'});
if ($in{'size_mode'} == -1) {
# Cannot change
$size = undef;
}
elsif ($in{'size_mode'} == 0) {
# Absolute size
$in{'size'} =~ /^\d+$/ || &error($text{'lv_esize'});
$size = $in{'size'};
if (defined($in{'size_units'})) {
# Convert selected units to kB
$size *= $in{'size_units'}/1024;
}
$sizeof = undef;
}
elsif ($in{'size_mode'} == 1) {
# Size of VG
$in{'vgsize'} =~ /^\d+$/ &&
$in{'vgsize'} > 0 &&
$in{'vgsize'} <= 100 || &error($text{'lv_evgsize'});
$size = $in{'vgsize'};
$sizeof = 'VG';
}
elsif ($in{'size_mode'} == 2) {
# Size of free space
if (!$in{'lv'}) {
$in{'freesize'} =~ /^\d+$/ &&
$in{'freesize'} > 0 &&
$in{'freesize'} <= 100 || &error($text{'lv_efreesize'});
}
$size = $in{'freesize'};
$sizeof = 'FREE';
}
elsif ($in{'size_mode'} == 3) {
# Size of some PV
$in{'pvsize'} =~ /^\d+$/ &&
$in{'pvsize'} > 0 &&
$in{'pvsize'} <= 100 || &error($text{'lv_epvsize'});
$size = $in{'pvsize'};
$sizeof = $in{'pvof'};
}
elsif ($in{'size_mode'} == 4) {
# Size in kB
$in{'sizekb'} =~ /^\d+$/ || &error($text{'lv_esize'});
$size = $in{'sizekb'};
$sizeof = undef;
}
else {
&error("Invalid size mode ".$in{'size_mode'});
}
$in{'snap'} || $in{'lv'} || $in{'stripe_def'} ||
$in{'stripe'} =~ /^[1-9]\d*$/ || &error($text{'lv_estripe'});
if (!$in{'lv'}) {
# Just create the logical volume
$lv->{'vg'} = $in{'vg'};
$lv->{'name'} = $in{'name'};
$lv->{'size'} = $size;
$lv->{'size_of'} = $sizeof;
if ($in{'snap'}) {
$lv->{'is_snap'} = 1;
$lv->{'snapof'} = $in{'snapof'};
}
else {
$lv->{'perm'} = $in{'perm'};
$lv->{'alloc'} = $in{'alloc'};
$lv->{'stripe'} = $in{'stripe'} if (!$in{'stripe_def'});
$lv->{'stripesize'} = $in{'stripesize'};
$lv->{'readahead'} = $in{'readahead'};
}
$lv->{'thin_in'} = $in{'thin'};
$err = &create_logical_volume($lv);
&error("<pre>$err</pre>") if ($err);
&webmin_log("create", "lv", $in{'name'}, $lv);
}
elsif ($lv->{'is_snap'}) {
# Modifying a snapshot
$oldsize = $lv->{'cow_size'} || $lv->{'size'};
if (defined($size) && $oldsize != $size) {
$err = &resize_snapshot_volume($lv, $size);
&error("<pre>$err</pre>") if ($err);
$lv->{'size'} = $size;
}
if ($lv->{'name'} ne $in{'name'}) {
# Need to rename
$err = &rename_logical_volume($lv, $in{'name'});
&error("<pre>$err</pre>") if ($err);
$lv->{'name'} = $in{'name'};
}
}
else {
# Modifying the logical volume
@stat = &device_status($lv->{'device'});
if ($lv->{'size'} != $size) {
# Is the new size too big?
local $nblocks = &round_up(
$size * 1.0 / $vg->{'pe_size'});
local $oblocks = &round_up(
$lv->{'size'} * 1.0 / $vg->{'pe_size'});
if ($vg->{'pe_alloc'} - $oblocks + $nblocks > $vg->{'pe_total'}) {
#&error(&text('lv_toobig', $nblocks, "$vg->{'pe_size'} kB", $vg->{'pe_total'} - $vg->{'pe_alloc'}));
}
local $realsize = $nblocks * $vg->{'pe_size'};
if ($in{'size_mode'} == 2) {
# Calculate free VG space and add current LV size to get the actual new LV size
$realsize = ($vg->{'pe_total'}*$vg->{'pe_size'})-($vg->{'pe_alloc'}*$vg->{'pe_size'})+$lv->{'size'};
}
if ($in{'sizeconfirm'}) {
# Just resize the logical volume
$err = &resize_logical_volume($lv, $realsize);
&error("<pre>$err</pre>") if ($err);
}
else {
local $can = &can_resize_lv_stat(@stat);
if (($can == 2 ||
$can == 1 && $realsize > $lv->{'size'}) &&
$stat[1]) {
# Attempt to resize FS properly
$err = &resize_filesystem($lv, $stat[1],
$realsize);
if ($err) {
$err = &text('resize_fs',
$stat[1],
"</center><pre>$err".
"</pre><center>");
}
}
elsif ($stat[2]) {
# Cannot resize while mounted
&error($can == 1 ?
$text{'resize_emounted2'} :
$text{'resize_emounted'});
}
else {
# Cannot resize .. ask for confirmation
$err = @stat && $stat[1] ne '*' &&
$stat[1] ne 'auto' ?
&text('resize_mesg', $stat[1]) :
$text{'resize_mesg2'};
}
if ($err) {
&ui_print_header(undef, $text{'resize_title'}, "");
print "<center><form action=save_lv.cgi>\n";
foreach $i (keys %in) {
print "<input type=hidden name=$i value='$in{$i}'>\n";
}
print "<b>$err</b> <p>\n";
print "<input type=submit name=sizeconfirm value='$text{'resize_ok'}'>\n";
print "</form></center>\n";
&ui_print_footer("", $text{'index_return'});
exit;
}
}
$lv->{'size'} = $realsize;
}
if ($lv->{'perm'} ne $in{'perm'} ||
$lv->{'alloc'} ne $in{'alloc'} ||
$lv->{'readahead'} ne $in{'readahead'}) {
# Need to change options
$lv->{'perm'} = $in{'perm'};
$lv->{'alloc'} = $in{'alloc'};
$lv->{'readahead'} = $in{'readahead'};
$err = &change_logical_volume($lv, $oldlv);
&error("<pre>$err</pre>") if ($err);
}
if ($lv->{'name'} ne $in{'name'}) {
# Need to rename
$err = &rename_logical_volume($lv, $in{'name'});
&error("<pre>$err</pre>") if ($err);
$lv->{'name'} = $in{'name'};
}
&webmin_log("modify", "lv", $in{'lv'}, $lv);
}
&redirect("index.cgi?mode=lvs");
}
sub round_up
{
local ($n) = @_;
if (int($n) != $n) {
return int($n)+1;
}
return $n;
}