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Subject: [pve-devel] [PATCH qemu-server 10/14] blockdev: convert
drive_mirror to blockdev_mirror
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From: Alexandre Derumier <alexandre.derumier@groupe-cyllene.com>
To: pve-devel@lists.proxmox.com
Subject: [PATCH qemu-server 10/14] blockdev: convert drive_mirror to blockdev_mirror
Date: Tue, 22 Apr 2025 13:51:37 +0200
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FIXME:
port qemu bitmap drive-mirror patch to blockdev-mirror
Signed-off-by: Alexandre Derumier <alexandre.derumier@groupe-cyllene.com>
---
PVE/QemuMigrate.pm | 2 +-
PVE/QemuServer.pm | 61 ++++++++++++++++-----------
test/MigrationTest/QemuMigrateMock.pm | 10 +++--
3 files changed, 44 insertions(+), 29 deletions(-)
diff --git a/PVE/QemuMigrate.pm b/PVE/QemuMigrate.pm
index b7bf2aa3..6edbfbef 100644
--- a/PVE/QemuMigrate.pm
+++ b/PVE/QemuMigrate.pm
@@ -1149,7 +1149,7 @@ sub phase2 {
my $bitmap = $target->{bitmap};
$self->log('info', "$drive: start migration to $nbd_uri");
- PVE::QemuServer::qemu_drive_mirror($vmid, $drive, $nbd_uri, $vmid, undef, $self->{storage_migration_jobs}, 'skip', undef, $bwlimit, $bitmap);
+ PVE::QemuServer::qemu_drive_mirror($vmid, $source_drive, $nbd_uri, $vmid, undef, $self->{storage_migration_jobs}, 'skip', undef, $bwlimit, $bitmap);
}
if (PVE::QemuServer::QMPHelpers::runs_at_least_qemu_version($vmid, 8, 2)) {
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 783f58c3..ffe60ead 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -7958,57 +7958,70 @@ sub qemu_img_convert {
sub qemu_drive_mirror {
my ($vmid, $drive, $dst_volid, $vmiddst, $is_zero_initialized, $jobs, $completion, $qga, $bwlimit, $src_bitmap) = @_;
- $jobs = {} if !$jobs;
+ my $storecfg = PVE::Storage::config();
- my $qemu_target;
- my $format;
- $jobs->{"drive-$drive"} = {};
+ # copy original drive config (aio,cache,discard,...)
+ my $dst_drive = dclone($drive);
+ $dst_drive->{file} = $dst_volid;
+ $dst_drive->{zeroinit} = 1 if $is_zero_initialized;
+ #improve: if target storage don't support aio uring,change it to default native
+ #and remove clone_disk_check_io_uring()
- if ($dst_volid =~ /^nbd:/) {
- $qemu_target = $dst_volid;
- $format = "nbd";
- } else {
- my $storecfg = PVE::Storage::config();
+ #add new block device
+ my $target_drive_blockdev = generate_drive_blockdev($storecfg, $dst_drive);
+ my $target_blockdev = $target_drive_blockdev->{file}; #can be fmt or only file for nbd
+ PVE::QemuServer::Monitor::mon_cmd($vmid, 'blockdev-add', %$target_blockdev);
+ my $target_nodename = $target_blockdev->{'node-name'};
- $format = checked_volume_format($storecfg, $dst_volid);
+ # we replace the original src_fmt node in the blockdev graph.
+ # need to be defined, or if not, it'll replace the root throttle-filter
+ my $src_drive_blockdev = generate_drive_blockdev($storecfg, $drive);
+ my $src_fmt_nodename = $src_drive_blockdev->{file}->{'node-name'};
- my $dst_path = PVE::Storage::path($storecfg, $dst_volid);
- $qemu_target = $is_zero_initialized ? "zeroinit:$dst_path" : $dst_path;
- }
+ my $drive_id = PVE::QemuServer::Drive::get_drive_id($drive);
+ my $deviceid = "drive-$drive_id";
+
+ $jobs = {} if !$jobs;
+ my $jobid = "mirror-$deviceid";
+ $jobs->{$jobid} = {};
my $opts = {
+ 'job-id' => $jobid,
timeout => 10,
- device => "drive-$drive",
- mode => "existing",
+ device => $deviceid,
+ replaces => $src_fmt_nodename,
sync => "full",
- target => $qemu_target,
+ target => $target_nodename,
'auto-dismiss' => JSON::false,
};
- $opts->{format} = $format if $format;
if (defined($src_bitmap)) {
$opts->{sync} = 'incremental';
- $opts->{bitmap} = $src_bitmap;
+ $opts->{bitmap} = $src_bitmap; ##FIXME: port qemu bitmap drive-mirror patch to blockdev-mirror
print "drive mirror re-using dirty bitmap '$src_bitmap'\n";
}
if (defined($bwlimit)) {
$opts->{speed} = $bwlimit * 1024;
- print "drive mirror is starting for drive-$drive with bandwidth limit: ${bwlimit} KB/s\n";
+ print "drive mirror is starting for $deviceid with bandwidth limit: ${bwlimit} KB/s\n";
} else {
- print "drive mirror is starting for drive-$drive\n";
+ print "drive mirror is starting for $deviceid\n";
}
# if a job already runs for this device we get an error, catch it for cleanup
- eval { mon_cmd($vmid, "drive-mirror", %$opts); };
+ eval { mon_cmd($vmid, "blockdev-mirror", %$opts); };
+
if (my $err = $@) {
eval { PVE::QemuServer::qemu_blockjobs_cancel($vmid, $jobs) };
warn "$@\n" if $@;
+ eval { mon_cmd($vmid, 'blockdev-del', 'node-name' => $target_blockdev->{file}->{'node-name'}) };
+ warn "$@\n" if $@;
+ eval { mon_cmd($vmid, 'blockdev-del', 'node-name' => $target_nodename) };
+ warn "$@\n" if $@;
die "mirroring error: $err\n";
}
-
- qemu_drive_mirror_monitor ($vmid, $vmiddst, $jobs, $completion, $qga);
+ qemu_drive_mirror_monitor ($vmid, $vmiddst, $jobs, $completion, $qga, 'mirror');
}
# $completion can be either
@@ -8367,7 +8380,7 @@ sub clone_disk {
my $sparseinit = PVE::Storage::volume_has_feature($storecfg, 'sparseinit', $newvolid);
if ($use_drive_mirror) {
- qemu_drive_mirror($vmid, $src_drivename, $newvolid, $newvmid, $sparseinit, $jobs,
+ qemu_drive_mirror($vmid, $drive, $newvolid, $newvmid, $sparseinit, $jobs,
$completion, $qga, $bwlimit);
} else {
if ($dst_drivename eq 'efidisk0') {
diff --git a/test/MigrationTest/QemuMigrateMock.pm b/test/MigrationTest/QemuMigrateMock.pm
index 11c58c08..d156ff1b 100644
--- a/test/MigrationTest/QemuMigrateMock.pm
+++ b/test/MigrationTest/QemuMigrateMock.pm
@@ -132,14 +132,16 @@ $MigrationTest::Shared::qemu_server_module->mock(
qemu_drive_mirror => sub {
my ($vmid, $drive, $dst_volid, $vmiddst, $is_zero_initialized, $jobs, $completion, $qga, $bwlimit, $src_bitmap) = @_;
+ my $drive_id = "$drive->{interface}$drive->{index}";
+
die "drive_mirror with wrong vmid: '$vmid'\n" if $vmid ne $test_vmid;
- die "qemu_drive_mirror '$drive' error\n"
- if $fail_config->{qemu_drive_mirror} && $fail_config->{qemu_drive_mirror} eq $drive;
+ die "qemu_drive_mirror '$drive_id' error\n"
+ if $fail_config->{qemu_drive_mirror} && $fail_config->{qemu_drive_mirror} eq $drive_id;
my $nbd_info = decode_json(file_get_contents("${RUN_DIR_PATH}/nbd_info"));
die "target does not expect drive mirror for '$drive'\n"
- if !defined($nbd_info->{$drive});
- delete $nbd_info->{$drive};
+ if !defined($nbd_info->{$drive_id});
+ delete $nbd_info->{$drive_id};
file_set_contents("${RUN_DIR_PATH}/nbd_info", to_json($nbd_info));
},
qemu_drive_mirror_monitor => sub {
--
2.39.5
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