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Added "nowritecache" option to ZFS storage plugin. Turns off write caching on Comstar and Istgt LUNs created by the plugin. Has no effect on IET, as IET always uses write-through caching for blockio volumes not in read-only mode.

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Signed-off-by: Chris Allen <Chris Allen>
This commit is contained in:
Chris Allen
2014-03-10 12:07:35 -07:00
committed by Dietmar Maurer
parent a9bd7bdfdc
commit 70986fd9e4
3 changed files with 26 additions and 5 deletions
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16
PVE/Storage/LunCmd/Istgt.pm
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@ -173,6 +173,11 @@ my $lun_dumper = sub {
foreach my $conf (@{$SETTINGS->{$lun}->{luns}}) {
$config .= "$conf->{lun} Storage " . $conf->{Storage};
$config .= ' ' . $size_with_unit->($conf->{Size}) . "\n";
foreach ($conf->{options}) {
if ($_) {
$config .= "$conf->{lun} Option " . $_ . "\n";
}
}
}
$config .= "\n";
@ -228,16 +233,21 @@ my $free_lu_name = sub {
};
my $make_lun = sub {
my ($path) = @_;
my ($scfg, $path) = @_;
my $target = $SETTINGS->{current};
die 'Maximum number of LUNs per target is 63' if scalar @{$SETTINGS->{$target}->{luns}} >= $MAX_LUNS;
my @options = ();
my $lun = $get_lu_name->($target);
if ($scfg->{nowritecache}) {
push @options, "WriteCache Disable";
}
my $conf = {
lun => $lun,
Storage => $path,
Size => 'AUTO',
options => @options,
};
push @{$SETTINGS->{$target}->{luns}}, $conf;
@ -274,7 +284,7 @@ my $parser = sub {
} elsif ($lun) {
next if (($_ =~ /^\s*#/) || ($_ =~ /^\s*$/));
if ($_ =~ /^\s*(\w+)\s+(.+)\s*/) {
#next if $2 =~ /^Option.*/;
next if $2 =~ /^Option.*/;
$SETTINGS->{$lun}->{$1} = $2;
$SETTINGS->{$lun}->{$1} =~ s/^\s+|\s+$|"\s*//g;
} else {
@ -349,7 +359,7 @@ my $create_lun = sub {
die "$params[0]: LUN exists";
}
my $lun = $params[0];
$lun = $make_lun->($lun);
$lun = $make_lun->($scfg, $lun);
my $config = $lun_dumper->($SETTINGS->{current});
open(my $fh, '>', $file) or die "Could not open file '$file' $!";