[pve-devel] [RFC qemu-server 4/9] api: add /cpu/model/* get/create/delete/update endpoints

[Stefan Reiter <s.reiter@proxmox.com>]

Standard API, loosely based on Storage config API code. Uses digests and
'delete'-parameter (parameters not given to an update call are
untouched).

Locking and writing helpers are added to CPUConfig. write_config is
fixed with adding 'type' to every section, otherwise SectionConfig
fails.

Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
---
 PVE/API2/Qemu/CPU.pm        | 174 +++++++++++++++++++++++++++++++++++-
 PVE/QemuServer/CPUConfig.pm |  17 +++-
 2 files changed, 189 insertions(+), 2 deletions(-)

diff --git a/PVE/API2/Qemu/CPU.pm b/PVE/API2/Qemu/CPU.pm
index 9cc1d77..8a3dcfd 100644
--- a/PVE/API2/Qemu/CPU.pm
+++ b/PVE/API2/Qemu/CPU.pm
@@ -8,7 +8,8 @@ use PVE::JSONSchema qw(get_standard_option);
 use PVE::INotify;
 use PVE::QemuServer;
 use PVE::QemuServer::CPUConfig;
-use PVE::Tools qw(run_command get_host_arch);
+use PVE::SectionConfig;
+use PVE::Tools qw(run_command get_host_arch extract_param);
 
 use base qw(PVE::RESTHandler);
 
@@ -218,4 +219,175 @@ __PACKAGE__->register_method({
 	return $retval;
     }});
 
+__PACKAGE__->register_method({
+    name => 'config',
+    path => 'model',
+    method => 'GET',
+    description => "Read all custom CPU model definitions.",
+    permissions => {
+	check => ['perm', '/nodes', ['Sys.Audit']],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {
+	    node => get_standard_option('pve-node'),
+	},
+    },
+    returns => { type => 'object' },
+    code => sub {
+	my $conf = PVE::QemuServer::CPUConfig::load_custom_model_conf();
+	delete $conf->{order};
+	my $ids = [];
+	foreach my $id (keys %{$conf->{ids}}) {
+	    delete $conf->{ids}->{$id}->{type};
+	    push @$ids, $conf->{ids}->{$id};
+	}
+	$conf->{ids} = $ids;
+	return $conf;
+    }});
+
+__PACKAGE__->register_method({
+    name => 'create',
+    path => 'model',
+    method => 'POST',
+    description => "Add a custom CPU model definition.",
+    permissions => {
+	check => ['perm', '/nodes', ['Sys.Console']],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => PVE::QemuServer::CPUConfig::add_cpu_json_properties({
+	    digest => get_standard_option('pve-config-digest'),
+	    node => get_standard_option('pve-node'),
+	}),
+    },
+    returns => { type => 'null' },
+    code => sub {
+	my ($param) = @_;
+	delete $param->{node};
+
+	my $digest = extract_param($param, 'digest');
+
+	my $name = $param->{'cputype'};
+	die "custom cpu models 'cputype' must start with 'custom-' prefix\n"
+	    if $name !~ m/^custom-/;
+	(my $name_no_prefix = $name) =~ s/^custom-//;
+
+	PVE::QemuServer::CPUConfig::lock_cpu_config(sub {
+	    my $conf = PVE::QemuServer::CPUConfig::load_custom_model_conf();
+	    PVE::SectionConfig::assert_if_modified($conf, $digest);
+
+	    die "custom cpu model '$name' already exists\n"
+		if defined($conf->{ids}->{$name_no_prefix});
+	    $conf->{ids}->{$name_no_prefix} = $param;
+
+	    PVE::QemuServer::CPUConfig::write_custom_model_conf($conf);
+	});
+    }});
+
+__PACKAGE__->register_method({
+    name => 'delete',
+    path => 'model/{cputype}',
+    method => 'DELETE',
+    description => "Delete a custom CPU model definition.",
+    permissions => {
+	check => ['perm', '/nodes', ['Sys.Console']],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {
+	    node => get_standard_option('pve-node'),
+	    digest => get_standard_option('pve-config-digest'),
+	    cputype => {
+		type => 'string',
+		format_description => 'string',
+		description => "The custom model to delete. Must be prefixed"
+			     . " with 'custom-'.",
+	    },
+	},
+    },
+    returns => { type => 'null' },
+    code => sub {
+	my ($param) = @_;
+
+	my $digest = extract_param($param, 'digest');
+
+	my $name = $param->{'cputype'};
+	die "cputype must start with 'custom-' prefix\n"
+	    if $name !~ m/^custom-/;
+	(my $name_no_prefix = $name) =~ s/^custom-//;
+
+	PVE::QemuServer::CPUConfig::lock_cpu_config(sub {
+	    my $conf = PVE::QemuServer::CPUConfig::load_custom_model_conf();
+	    PVE::SectionConfig::assert_if_modified($conf, $digest);
+
+	    die "custom cpu model '$name' doesn't exist\n"
+		if !defined($conf->{ids}->{$name_no_prefix});
+	    delete $conf->{ids}->{$name_no_prefix};
+
+	    PVE::QemuServer::CPUConfig::write_custom_model_conf($conf);
+	});
+    }});
+
+__PACKAGE__->register_method({
+    name => 'update',
+    path => 'model/{cputype}',
+    method => 'PUT',
+    description => "Update a custom CPU model definition.",
+    permissions => {
+	check => ['perm', '/nodes', ['Sys.Console']],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => PVE::QemuServer::CPUConfig::add_cpu_json_properties({
+	    node => get_standard_option('pve-node'),
+	    digest => get_standard_option('pve-config-digest'),
+	    delete => {
+		type => 'string',
+		format => 'pve-configid-list',
+		description => "A list of properties to delete.",
+		optional => 1,
+	    },
+	}),
+    },
+    returns => { type => 'null' },
+    code => sub {
+	my ($param) = @_;
+	delete $param->{node};
+
+	my $digest = extract_param($param, 'digest');
+	my $delete = extract_param($param, 'delete') // '';
+	my %delete_hash = map { $_ => 1 } PVE::Tools::split_list($delete);
+
+	my $name = $param->{'cputype'};
+	die "custom cpu models 'cputype' must start with 'custom-' prefix\n"
+	    if $name !~ m/^custom-/;
+	(my $name_no_prefix = $name) =~ s/^custom-//;
+
+	PVE::QemuServer::CPUConfig::lock_cpu_config(sub {
+	    my $conf = PVE::QemuServer::CPUConfig::load_custom_model_conf();
+
+	    PVE::SectionConfig::assert_if_modified($conf, $digest);
+
+	    my $model = $conf->{ids}->{$name_no_prefix};
+	    die "custom cpu model '$name' doesn't exist\n"
+		if !defined($model);
+
+	    my $props = PVE::QemuServer::CPUConfig::add_cpu_json_properties({});
+	    for my $p (keys %$props) {
+		if ($delete_hash{$p}) {
+		    die "cannot delete 'cputype' property\n"
+			if $p eq 'cputype';
+		    die "cannot set and delete property '$p' at once\n"
+			if $param->{$p};
+		    delete $model->{$p};
+		} elsif (defined($param->{$p})) {
+		    $model->{$p} = $param->{$p};
+		}
+	    }
+
+	    PVE::QemuServer::CPUConfig::write_custom_model_conf($conf);
+	});
+    }});
+
 1;
diff --git a/PVE/QemuServer/CPUConfig.pm b/PVE/QemuServer/CPUConfig.pm
index 9be8022..08a174f 100644
--- a/PVE/QemuServer/CPUConfig.pm
+++ b/PVE/QemuServer/CPUConfig.pm
@@ -4,7 +4,7 @@ use strict;
 use warnings;
 
 use PVE::JSONSchema;
-use PVE::Cluster qw(cfs_register_file cfs_read_file);
+use PVE::Cluster qw(cfs_register_file cfs_read_file cfs_write_file cfs_lock_file);
 use PVE::QemuServer::Helpers qw(min_version);
 
 use base qw(PVE::SectionConfig Exporter);
@@ -29,6 +29,19 @@ sub load_custom_model_conf {
     return cfs_read_file($default_filename);
 }
 
+sub write_custom_model_conf {
+    my ($conf) = @_;
+    cfs_write_file($default_filename, $conf);
+}
+
+sub lock_cpu_config {
+    my ($code) = @_;
+    cfs_lock_file($default_filename, undef, $code);
+    if (my $err = $@) {
+	die $err;
+    }
+}
+
 my $cpu_vendor_list = {
     # Intel CPUs
     486 => 'GenuineIntel',
@@ -270,6 +283,8 @@ sub write_config {
 
 	# saved in section header
 	delete $model_conf->{cputype};
+
+	$model_conf->{type} = $class->type();
     }
 
     $class->SUPER::write_config($filename, $cfg);
-- 
2.30.2