this allows a user to set a drive to 'read-only'. This can be useful
if a disk should not be written to, or if the backing file/source is
not writable (like a mapped pbs backup to /dev/loopX).
while this could also be achieved by setting 'snapshot=1', this would
create a temporary file in /var/tmp which can get quite big.
Signed-off-by: Dominik Csapak <d.csa...@proxmox.com>
---
changes from v1:
* limit that setting to scsi/virtio as it is not possible to use it on
ide/sata
PVE/QemuServer.pm | 10 ++++++----
PVE/QemuServer/Drive.pm | 11 +++++++++++
2 files changed, 17 insertions(+), 4 deletions(-)
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 0fb8628..5209f51 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -1569,10 +1569,12 @@ sub print_drive_commandline_full {
$opts .= ",$o=$drive->{$o}" if defined($drive->{$o});
}
- # snapshot only accepts on|off
- if (defined($drive->{snapshot})) {
- my $v = $drive->{snapshot} ? 'on' : 'off';
- $opts .= ",snapshot=$v";
+ # some options only accepts on|off
+ foreach my $o (qw(snapshot readonly)) {
+ if (defined($drive->{$o})) {
+ my $v = $drive->{$o} ? 'on' : 'off';
+ $opts .= ",$o=$v";
+ }
}
foreach my $type (['', '-total'], [_rd => '-read'], [_wr => '-write']) {
diff --git a/PVE/QemuServer/Drive.pm b/PVE/QemuServer/Drive.pm
index 5110190..af7aafe 100644
--- a/PVE/QemuServer/Drive.pm
+++ b/PVE/QemuServer/Drive.pm
@@ -175,6 +175,14 @@ my %queues_fmt = (
}
);
+my %readonly_fmt = (
+ readonly => {
+ type => 'boolean',
+ description => "Whether the drive is read-only.",
+ optional => 1,
+ },
+);
+
my %scsiblock_fmt = (
scsiblock => {
type => 'boolean',
@@ -269,6 +277,7 @@ my $scsi_fmt = {
%drivedesc_base,
%iothread_fmt,
%queues_fmt,
+ %readonly_fmt,
%scsiblock_fmt,
%ssd_fmt,
%wwn_fmt,
@@ -297,6 +306,7 @@ PVE::JSONSchema::register_standard_option("pve-qm-sata",
$satadesc);
my $virtio_fmt = {
%drivedesc_base,
%iothread_fmt,
+ %readonly_fmt,
};
my $virtiodesc = {
optional => 1,
@@ -311,6 +321,7 @@ my $alldrive_fmt = {
%iothread_fmt,
%model_fmt,
%queues_fmt,
+ %readonly_fmt,
%scsiblock_fmt,
%ssd_fmt,
%wwn_fmt,
--
2.30.2
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