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Subject: Re: [pve-devel] [PATCH qemu-server v7 6/9] api: enable live
migration for marked mapped pci devices
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Am 11.03.25 um 14:20 schrieb Dominik Csapak:
> They have to be marked as 'live-migration-capable' in the mapping
> config, and the driver and qemu must support it.
>
> For the gui checks, we now return the whole object of the mapped
> resources, which includes info like the name and if it's marked as
> live-migration capable. (while deprecating the old 'mapped-resource'
> return value, since that returns strictly less information)
>
> Reviewed-by: Christoph Heiss <c.heiss@proxmox.com>
> Reviewed-by: Fiona Ebner <f.ebner@proxmox.com>
> Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
> ---
> PVE/API2/Qemu.pm | 8 +++++++-
> PVE/QemuMigrate.pm | 17 ++++++++++++-----
> 2 files changed, 19 insertions(+), 6 deletions(-)
>
> diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
> index 060bca8b..15bf7548 100644
> --- a/PVE/API2/Qemu.pm
> +++ b/PVE/API2/Qemu.pm
> @@ -4665,13 +4665,18 @@ __PACKAGE__->register_method({
> },
> description => "List local resources (e.g. pci, usb) that block migration."
> },
> + # FIXME: remove with 9.0
> 'mapped-resources' => {
> type => 'array',
> items => {
> type => 'string',
> description => "A mapped resource",
> },
> - description => "List of mapped resources e.g. pci, usb"
> + description => "List of mapped resources e.g. pci, usb. Deprecated, use 'mapped-resource-info' instead."
> + },
> + 'mapped-resource-info' => {
> + type => 'object',
> + description => "Object of mapped resources with additional information such if they're live migratable.",
Where is the schema/format for this? New stuff really should be documented
here, I mean, have you not sent enough schema updates to unlock basic features
in the rust based PVE api crate used in PDM? ;-)
> },
> },
> },
> @@ -4737,6 +4742,7 @@ __PACKAGE__->register_method({
>
> $res->{local_resources} = $local_resources;
> $res->{'mapped-resources'} = [ sort keys $mapped_resources->%* ];
> + $res->{'mapped-resource-info'} = $mapped_resources;
would be IMO nicer to add returning that info upfront and then combine this
with patch with 4/9 to have two patches that each do one thing, and not a
split/mix.
But I probably will just apply this as is with trying to bend the commit
message from implementation details to the effect of the patch, will not
be ideal, but I want to finish this finally..
No offense to anybody, but IMO does not pain the best picture considering
this has two R-b tags..
>
> return $res;
>
> diff --git a/PVE/QemuMigrate.pm b/PVE/QemuMigrate.pm
> index 2153ac42..6909fc82 100644
> --- a/PVE/QemuMigrate.pm
> +++ b/PVE/QemuMigrate.pm
> @@ -243,11 +243,18 @@ sub prepare {
>
> if (scalar(keys $mapped_res->%*)) {
> my $missing_mappings = $missing_mappings_by_node->{$self->{node}};
> - if ($running) {
> - my $mapped_text = join(", ", sort keys $mapped_res->%*);
> - die "can't migrate running VM which uses mapped devices: $mapped_text\n";
> - } elsif (scalar($missing_mappings->@*)) {
> - die "can't migrate to '$self->{node}': missing mapped devices " . join(", ", $missing_mappings->@*) . "\n";
> + my $missing_live_mappings = [];
> + for my $key (sort keys $mapped_res->%*) {
> + my $res = $mapped_res->{$key};
> + my $name = "$key:$res->{name}";
> + push $missing_live_mappings->@*, $name if !$res->{'live-migration'};
> + }
> + if (scalar($missing_mappings->@*)) {
> + my $missing = join(", ", $missing_mappings->@*);
> + die "can't migrate to '$self->{node}': missing mapped devices $missing\n";
> + } elsif ($running && scalar($missing_live_mappings->@*)) {
> + my $missing = join(", ", $missing_live_mappings->@*);
> + die "can't live migrate running VM which uses following mapped devices: $missing\n";
> } else {
> $self->log('info', "migrating VM which uses mapped local devices");
> }
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