[PATCH qemu-server v2 05/17] cpu config: Add helpers to lock and write config

[Arthur Bied-Charreton <a.bied-charreton@proxmox.com>]

Add lock/write primitives to allow programmatic access to
/etc/pve/virtual-guest/cpu-models.conf as a preparatory step for adding a
custom CPU models CRUD API to pve-manager.

Signed-off-by: Arthur Bied-Charreton <a.bied-charreton@proxmox.com>
---
 src/PVE/QemuServer/CPUConfig.pm | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/PVE/QemuServer/CPUConfig.pm b/src/PVE/QemuServer/CPUConfig.pm
index 0ee9b991..65ced94f 100644
--- a/src/PVE/QemuServer/CPUConfig.pm
+++ b/src/PVE/QemuServer/CPUConfig.pm
@@ -6,7 +6,7 @@ use warnings;
 use JSON;
 
 use PVE::JSONSchema qw(json_bool);
-use PVE::Cluster qw(cfs_register_file cfs_read_file);
+use PVE::Cluster qw(cfs_register_file cfs_read_file cfs_lock_file cfs_write_file);
 use PVE::ProcFSTools;
 use PVE::RESTEnvironment qw(log_warn);
 use PVE::Tools qw(run_command);
@@ -50,6 +50,17 @@ sub load_custom_model_conf {
     return cfs_read_file($cpu_models_filename);
 }
 
+sub write_custom_model_conf {
+    my ($conf) = @_;
+    cfs_write_file($cpu_models_filename, $conf);
+}
+
+sub lock_cpu_config {
+    my ($code) = @_;
+    cfs_lock_file($cpu_models_filename, undef, $code);
+    die $@ if $@;
+}
+
 #builtin models : reported-model is mandatory
 my $builtin_models_by_arch = {
     x86_64 => {
-- 
2.47.3