* [pve-devel] [PATCH qemu-server v3] drives: expose 'readonly' flag of qemu for scsi/virtio
@ 2021-10-27 11:35 Dominik Csapak
2021-10-27 15:01 ` [pve-devel] applied: " Thomas Lamprecht
0 siblings, 1 reply; 2+ messages in thread
From: Dominik Csapak @ 2021-10-27 11:35 UTC (permalink / raw)
To: pve-devel
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).
the option is named 'ro', to achieve consistency with containers
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.csapak@proxmox.com>
---
changes from v2:
* renamed option to 'ro' to be in line with containers
PVE/QemuServer.pm | 6 ++++++
PVE/QemuServer/Drive.pm | 11 +++++++++++
2 files changed, 17 insertions(+)
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 0fb8628..5b31ad0 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -1575,6 +1575,12 @@ sub print_drive_commandline_full {
$opts .= ",snapshot=$v";
}
+ # ro is 'readonly', and only accepts on|off
+ if (defined($drive->{ro})) {
+ my $v = $drive->{ro} ? 'on' : 'off';
+ $opts .= ",readonly=$v";
+ }
+
foreach my $type (['', '-total'], [_rd => '-read'], [_wr => '-write']) {
my ($dir, $qmpname) = @$type;
if (my $v = $drive->{"mbps$dir"}) {
diff --git a/PVE/QemuServer/Drive.pm b/PVE/QemuServer/Drive.pm
index 5110190..3eadf03 100644
--- a/PVE/QemuServer/Drive.pm
+++ b/PVE/QemuServer/Drive.pm
@@ -175,6 +175,14 @@ my %queues_fmt = (
}
);
+my %readonly_fmt = (
+ ro => {
+ 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
^ permalink raw reply [flat|nested] 2+ messages in thread
* [pve-devel] applied: [PATCH qemu-server v3] drives: expose 'readonly' flag of qemu for scsi/virtio
2021-10-27 11:35 [pve-devel] [PATCH qemu-server v3] drives: expose 'readonly' flag of qemu for scsi/virtio Dominik Csapak
@ 2021-10-27 15:01 ` Thomas Lamprecht
0 siblings, 0 replies; 2+ messages in thread
From: Thomas Lamprecht @ 2021-10-27 15:01 UTC (permalink / raw)
To: Proxmox VE development discussion, Dominik Csapak
On 27/10/2021 13:35, Dominik Csapak wrote:
> 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).
>
> the option is named 'ro', to achieve consistency with containers
>
> 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.csapak@proxmox.com>
> ---
> changes from v2:
> * renamed option to 'ro' to be in line with containers
>
> PVE/QemuServer.pm | 6 ++++++
> PVE/QemuServer/Drive.pm | 11 +++++++++++
> 2 files changed, 17 insertions(+)
>
>
applied, thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2021-10-27 15:01 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-10-27 11:35 [pve-devel] [PATCH qemu-server v3] drives: expose 'readonly' flag of qemu for scsi/virtio Dominik Csapak
2021-10-27 15:01 ` [pve-devel] applied: " Thomas Lamprecht
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox