[pve-devel] applied-series: [PATCH container v2 1/2] restore: clean up config when invalid source archive is given

["Fabian Grünbichler" <f.gruenbichler@proxmox.com>]

thanks!

On November 29, 2022 3:00 pm, Daniel Tschlatscher wrote:
> Before, if a non-existent source archive parameter was passed when
> restoring a container, the task would fail but leave an empty config
> file behind. The same with invalid mount point configurations.
> In both cases, the empty config will now be removed.
> 
> Signed-off-by: Daniel Tschlatscher <d.tschlatscher@proxmox.com>
> ---
> Changes from v1:
> * According to Thomas' suggestion I revised the code so that all
>   errors are now handled centrally in the lower clean up handler which
>   before was only used for the case when the config was unrecoverable
>   and merged the two consecutive eval blocks into one.
>   For this, I repurposed the $remove_lock variable and renamed it to
>   better reflect its new usage.
> 
>  src/PVE/API2/LXC.pm | 19 +++++++++----------
>  1 file changed, 9 insertions(+), 10 deletions(-)
> 
> diff --git a/src/PVE/API2/LXC.pm b/src/PVE/API2/LXC.pm
> index 03d7ea0..f2113de 100644
> --- a/src/PVE/API2/LXC.pm
> +++ b/src/PVE/API2/LXC.pm
> @@ -372,12 +372,13 @@ __PACKAGE__->register_method({
>  	eval { PVE::LXC::Config->create_and_lock_config($vmid, $force) };
>  	die "$emsg $@" if $@;
>  
> -	my $remove_lock = 1;
> +	my $destroy_config_on_error = !$same_container_exists;
>  
>  	my $code = sub {
>  	    my $old_conf = PVE::LXC::Config->load_config($vmid);
>  	    my $was_template;
>  
> +	    my $vollist = [];
>  	    eval {
>  		my $orig_mp_param; # only used if $restore
>  		if ($restore) {
> @@ -444,14 +445,10 @@ __PACKAGE__->register_method({
>  			$mp_param->{rootfs} = "$storage:4"; # defaults to 4GB
>  		    }
>  		}
> -	    };
> -	    die "$emsg $@" if $@;
>  
> -	    # up until here we did not modify the container, besides the lock
> -	    $remove_lock = 0;
> +		# up until here we did not modify the container, besides the lock
> +		$destroy_config_on_error = 1;
>  
> -	    my $vollist = [];
> -	    eval {
>  		$vollist = PVE::LXC::create_disks($storage_cfg, $vmid, $mp_param, $conf);
>  
>  		# we always have the 'create' lock so check for more than 1 entry
> @@ -499,8 +496,10 @@ __PACKAGE__->register_method({
>  	    };
>  	    if (my $err = $@) {
>  		PVE::LXC::destroy_disks($storage_cfg, $vollist);
> -		eval { PVE::LXC::Config->destroy_config($vmid) };
> -		warn $@ if $@;
> +		if ($destroy_config_on_error) {
> +		    eval { PVE::LXC::Config->destroy_config($vmid) };
> +		    warn $@ if $@;
> +		}
>  		die "$emsg $err";
>  	    }
>  	    PVE::AccessControl::add_vm_to_pool($vmid, $pool) if $pool;
> @@ -516,7 +515,7 @@ __PACKAGE__->register_method({
>  	    };
>  	    if (my $err = $@) {
>  		# if we aborted before changing the container, we must remove the create lock
> -		if ($remove_lock) {
> +		if (!$destroy_config_on_error) {
>  		    PVE::LXC::Config->remove_lock($vmid, 'create');
>  		}
>  		die $err;
> -- 
> 2.30.2
> 
> 
> 
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