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From: Markus Frank <m.frank@proxmox.com>
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Date: Mon, 11 Nov 2024 14:57:11 +0100
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Subject: [pve-devel] [PATCH qemu-server v12 4/6] migration: add
check_non_migratable_resources function
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The function checks for resources that cannot be migrated, snapshoted,
or suspended.
To run this function while the snapshot lock is active, the
pve-guest-common patch 'AbstractConfig: add abstract method to check for
resources preventing a snapshot.' is required.
Signed-off-by: Markus Frank <m.frank@proxmox.com>
---
changes v12:
* added overwrite of abstract method __snapshot_assert_no_blockers in
QemuConfig
* renamed non_migr_res to blockers and non_migratable_resources
PVE/API2/Qemu.pm | 5 ++++-
PVE/QemuConfig.pm | 5 +++++
PVE/QemuMigrate.pm | 2 +-
PVE/QemuServer.pm | 23 ++++++++++++++++++++++-
4 files changed, 32 insertions(+), 3 deletions(-)
diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
index 848001b6..d16b8baa 100644
--- a/PVE/API2/Qemu.pm
+++ b/PVE/API2/Qemu.pm
@@ -4531,7 +4531,7 @@ __PACKAGE__->register_method({
$res->{running} = PVE::QemuServer::check_running($vmid) ? 1:0;
my ($local_resources, $mapped_resources, $missing_mappings_by_node) =
- PVE::QemuServer::check_local_resources($vmconf, 1);
+ PVE::QemuServer::check_local_resources($vmconf, $res->{running}, 1);
delete $missing_mappings_by_node->{$localnode};
my $vga = PVE::QemuServer::parse_vga($vmconf->{vga});
@@ -5219,6 +5219,9 @@ __PACKAGE__->register_method({
die "unable to use snapshot name 'pending' (reserved name)\n"
if lc($snapname) eq 'pending';
+ my $vmconf = PVE::QemuConfig->load_config($vmid);
+ PVE::QemuServer::check_non_migratable_resources($vmconf, $param->{vmstate}, 0);
+
my $realcmd = sub {
PVE::Cluster::log_msg('info', $authuser, "snapshot VM $vmid: $snapname");
PVE::QemuConfig->snapshot_create($vmid, $snapname, $param->{vmstate},
diff --git a/PVE/QemuConfig.pm b/PVE/QemuConfig.pm
index 8e8a7828..ffdf9f03 100644
--- a/PVE/QemuConfig.pm
+++ b/PVE/QemuConfig.pm
@@ -199,6 +199,11 @@ sub get_backup_volumes {
return $return_volumes;
}
+sub __snapshot_assert_no_blockers {
+ my ($class, $vmconf, $save_vmstate) = @_;
+ PVE::QemuServer::check_non_migratable_resources($vmconf, $save_vmstate, 0);
+}
+
sub __snapshot_save_vmstate {
my ($class, $vmid, $conf, $snapname, $storecfg, $statestorage, $suspend) = @_;
diff --git a/PVE/QemuMigrate.pm b/PVE/QemuMigrate.pm
index 6591f3f7..09e97268 100644
--- a/PVE/QemuMigrate.pm
+++ b/PVE/QemuMigrate.pm
@@ -233,7 +233,7 @@ sub prepare {
$self->{vm_was_paused} = 1 if PVE::QemuServer::vm_is_paused($vmid, 0);
}
- my ($loc_res, $mapped_res, $missing_mappings_by_node) = PVE::QemuServer::check_local_resources($conf, 1);
+ my ($loc_res, $mapped_res, $missing_mappings_by_node) = PVE::QemuServer::check_local_resources($conf, $running, 1);
my $blocking_resources = [];
for my $res ($loc_res->@*) {
if (!grep($res, $mapped_res->@*)) {
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index dd6ae93f..e94f6d0d 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -2563,13 +2563,32 @@ sub config_list {
return $res;
}
+sub check_non_migratable_resources {
+ my ($conf, $state, $noerr) = @_;
+
+ my @blockers = ();
+ if ($state && $conf->{amd_sev}) {
+ push @blockers, "amd_sev";
+ }
+
+ if (scalar(@blockers) && !$noerr) {
+ die "Cannot live-migrate, snapshot (with RAM), or hibernate a VM with:"
+ ." @blockers\n";
+ }
+
+ return @blockers;
+}
+
# test if VM uses local resources (to prevent migration)
sub check_local_resources {
- my ($conf, $noerr) = @_;
+ my ($conf, $state, $noerr) = @_;
my @loc_res = ();
my $mapped_res = [];
+ my @non_migratable_resources = check_non_migratable_resources($conf, $state, $noerr);
+ push(@loc_res, @non_migratable_resources);
+
my $nodelist = PVE::Cluster::get_nodelist();
my $pci_map = PVE::Mapping::PCI::config();
my $usb_map = PVE::Mapping::USB::config();
@@ -6445,6 +6464,8 @@ sub vm_suspend {
die "cannot suspend to disk during backup\n"
if $is_backing_up && $includestate;
+ check_non_migratable_resources($conf, $includestate, 0);
+
if ($includestate) {
$conf->{lock} = 'suspending';
my $date = strftime("%Y-%m-%d", localtime(time()));
--
2.39.5
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