[pve-devel] [PATCH v2 container] fix #3313: recover unprivileged bit from old config during pct restore

[Thomas Lamprecht]

On 23.02.21 13:29, Oguz Bektas wrote:
> since pct defaults to privileged containers, it restores the container
> as privileged when `--unprivileged 1` is not passed.
> 
> instead we should check the old configuration and retrieve it
> from there.
> 
> this way, when one creates an unprivileged container on GUI, it will be
> still restored as unprivileged via pct (without having to pass
> `--unprivileged 1` parameter)
> 

please note the effects of your change to `if ($is_root && $archive ne '-') {`
Fabi describes, pick up his R-b/T-b tag and send a v3 with the style comments
below addressed.

> Signed-off-by: Oguz Bektas <o.bektas at proxmox.com>
> ---
> v1->v2:
> * move the $is_root guard
> * wrap line to make it shorter
> * shorten comment
> * use () around defined
> * also check defined($orig_conf->{unprivileged})
> 
> 
>  src/PVE/API2/LXC.pm | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/src/PVE/API2/LXC.pm b/src/PVE/API2/LXC.pm
> index 8ce462f..3d3dbb0 100644
> --- a/src/PVE/API2/LXC.pm
> +++ b/src/PVE/API2/LXC.pm
> @@ -352,7 +352,7 @@ __PACKAGE__->register_method({
>  		my $orig_mp_param; # only used if $restore
>  		if ($restore) {
>  		    die "can't overwrite running container\n" if PVE::LXC::check_running($vmid);
> -		    if ($is_root && $archive ne '-') {
> +		    if ($archive ne '-') {
>  			my $orig_conf;
>  			print "recovering backed-up configuration from '$archive'\n";
>  			($orig_conf, $orig_mp_param) = PVE::LXC::Create::recover_config($storage_cfg, $archive, $vmid);
> @@ -361,7 +361,11 @@ __PACKAGE__->register_method({
>  			# causing it to restore the raw lxc entries, among which there may be
>  			# 'lxc.idmap' entries. We need to make sure that the extracted contents
>  			# of the container match up with the restored configuration afterwards:
> -			$conf->{lxc} = $orig_conf->{lxc};
> +			$conf->{lxc} = $orig_conf->{lxc} if $is_root;
> +
> +			# make sure to retrieve the privilege level of container if not specified

Does this really adds any value in your opinion? It IMO adds even some confusion
as its not clear where has to be "not specified"... I'd really just drop it.


> +			$conf->{unprivileged} = $orig_conf->{unprivileged} if !defined($unprivileged)
> +			    && defined($orig_conf->{unprivileged});

that's not how we wrap lines for post ifs, as you can se from looking at any code
of ours...

Wrote it now also down as more definite rule in the Perl Style Guide
https://pve.proxmox.com/wiki/Perl_Style_Guide#Wrapping_Post-If

>  		    }
>  		}
>  		if ($storage_only_mode) {
>