[pve-devel] [PATCH qemu-server 04/14] blockdev : convert qemu_driveadd && qemu_drivedel

[Alexandre Derumier via pve-devel <pve-devel@lists.proxmox.com>]

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From: Alexandre Derumier <alexandre.derumier@groupe-cyllene.com>
To: pve-devel@lists.proxmox.com
Subject: [PATCH qemu-server 04/14] blockdev : convert qemu_driveadd && qemu_drivedel
Date: Tue, 22 Apr 2025 13:51:29 +0200
Message-ID: <20250422115141.808427-9-alexandre.derumier@groupe-cyllene.com>

fixme:
backup seem to use a tpmstate0-backup drive. Not sure how it's works, but
I think it could be converted to blockdev too

Signed-off-by: Alexandre Derumier <alexandre.derumier@groupe-cyllene.com>
---
 PVE/QemuServer.pm       | 37 +++++++++++++++----------------------
 PVE/QemuServer/Drive.pm |  1 +
 2 files changed, 16 insertions(+), 22 deletions(-)

diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 85745ee4..f12e27f2 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -55,7 +55,7 @@ use PVE::QemuServer::Helpers qw(config_aware_timeout min_version kvm_user_versio
 use PVE::QemuServer::Cloudinit;
 use PVE::QemuServer::CGroup;
 use PVE::QemuServer::CPUConfig qw(print_cpu_device get_cpu_options get_cpu_bitness is_native_arch get_amd_sev_object get_amd_sev_type);
-use PVE::QemuServer::Drive qw(is_valid_drivename checked_volume_format drive_is_cloudinit drive_is_cdrom drive_is_read_only parse_drive print_drive print_drive_throttle_group generate_drive_blockdev);
+use PVE::QemuServer::Drive qw(is_valid_drivename checked_volume_format drive_is_cloudinit drive_is_cdrom drive_is_read_only parse_drive print_drive print_drive_throttle_group generate_drive_blockdev generate_throttle_group);
 use PVE::QemuServer::Machine;
 use PVE::QemuServer::Memory qw(get_current_memory);
 use PVE::QemuServer::MetaInfo;
@@ -4204,32 +4204,25 @@ sub qemu_iothread_del {
 }
 
 sub qemu_driveadd {
-    my ($storecfg, $vmid, $device) = @_;
+    my ($storecfg, $vmid, $drive) = @_;
 
-    my $kvmver = get_running_qemu_version($vmid);
-    my $io_uring = min_version($kvmver, 6, 0);
-    my $drive = print_drive_commandline_full($storecfg, $vmid, $device, undef, $io_uring);
-    $drive =~ s/\\/\\\\/g;
-    my $ret = PVE::QemuServer::Monitor::hmp_cmd($vmid, "drive_add auto \"$drive\"", 60);
-
-    # If the command succeeds qemu prints: "OK"
-    return 1 if $ret =~ m/OK/s;
-
-    die "adding drive failed: $ret\n";
+    my $drive_id = PVE::QemuServer::Drive::get_drive_id($drive);
+    # always add a throttle-group, as it's mandatory for the throttle-filter root node.
+    my $throttle_group = generate_throttle_group($drive);
+    mon_cmd($vmid, 'object-add', "qom-type" => "throttle-group", %$throttle_group);
+
+    # The throttle filter is the root node with a stable name attached to the device,
+    # and currently it's not possible to insert it later
+    my $blockdev = generate_drive_blockdev($storecfg, $drive);
+    mon_cmd($vmid, 'blockdev-add', %$blockdev, timeout => 10 * 60);
+    return 1;
 }
 
 sub qemu_drivedel {
     my ($vmid, $deviceid) = @_;
 
-    my $ret = PVE::QemuServer::Monitor::hmp_cmd($vmid, "drive_del drive-$deviceid", 10 * 60);
-    $ret =~ s/^\s+//;
-
-    return 1 if $ret eq "";
-
-    # NB: device not found errors mean the drive was auto-deleted and we ignore the error
-    return 1 if $ret =~ m/Device \'.*?\' not found/s;
-
-    die "deleting drive $deviceid failed : $ret\n";
+    mon_cmd($vmid, 'blockdev-del', 'node-name' => "drive-$deviceid", timeout => 10 * 60);
+    mon_cmd($vmid, 'object-del', id => "throttle-drive-$deviceid");
 }
 
 sub qemu_deviceaddverify {
@@ -4464,7 +4457,7 @@ sub qemu_block_set_io_throttle {
 
     return if !check_running($vmid) ;
 
-    mon_cmd($vmid, "block_set_io_throttle", device => $deviceid,
+    mon_cmd($vmid, "block_set_io_throttle", id => $deviceid,
 	bps => int($bps),
 	bps_rd => int($bps_rd),
 	bps_wr => int($bps_wr),
diff --git a/PVE/QemuServer/Drive.pm b/PVE/QemuServer/Drive.pm
index 72434f52..146b266b 100644
--- a/PVE/QemuServer/Drive.pm
+++ b/PVE/QemuServer/Drive.pm
@@ -26,6 +26,7 @@ parse_drive
 print_drive
 print_drive_throttle_group
 generate_drive_blockdev
+generate_throttle_group
 );
 
 our $QEMU_FORMAT_RE = qr/raw|qcow|qcow2|qed|vmdk|cloop/;
-- 
2.39.5



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