[pve-devel] [PATCH container v6 2/4] config: apply_pending: get unused volid through parse_volume()
Fiona Ebner
f.ebner at proxmox.com
Tue May 20 15:45:28 CEST 2025
Am 20.05.25 um 11:08 schrieb Michael Köppl:
> The volume ID returned by parse_volume() is used here as opposed to
> $conf->{$opt} used for regular mount points because $conf->{$opt} is not
> necessarily a valid volume ID in this case. This distinction is
> important because is_volume_in_use does internally not consider
> 'unused*' a valid volume key and does not check it. parse_volume knows
> about 'unused*' and returns a valid volume ID.
The key is not passed to is_volume_in_use(), just the value. The
rationale is imprecise in that regard.
Hmm, what can the value for 'unusedN' be other than a valid volume ID?
Do you have an example? I'd rather avoid adding entries where it is not
a volume ID to 'unusedN' in the first place.
> No functional changes intended.
Yes there is, as you want to fix handling 'unusedN' entries. Why make
the change otherwise?
>
> Originally-by: Stefan Hrdlicka <s.hrdlicka at proxmox.com>
> Signed-off-by: Michael Köppl <m.koeppl at proxmox.com>
> ---
> src/PVE/LXC/Config.pm | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/src/PVE/LXC/Config.pm b/src/PVE/LXC/Config.pm
> index 0740e8c..a7c1023 100644
> --- a/src/PVE/LXC/Config.pm
> +++ b/src/PVE/LXC/Config.pm
> @@ -1557,15 +1557,20 @@ sub vmconfig_apply_pending {
> foreach my $opt (sort keys %$pending_delete_hash) {
> next if $selection && !$selection->{$opt};
> eval {
> + my $mp = $class->parse_volume($opt, $conf->{$opt});
You don't know that $opt is for a volume at this stage, it can be
anything, e.g. 'net0'.
> +
> if ($opt =~ m/^mp(\d+)$/) {
> - my $mp = $class->parse_volume($opt, $conf->{$opt});
> if ($mp->{type} eq 'volume') {
> $class->add_unused_volume($conf, $mp->{volume})
> if !$class->is_volume_in_use($conf, $conf->{$opt}, 1, 1);
> }
> } elsif ($opt =~ m/^unused(\d+)$/) {
> + # $mp->{volume} is used for is_volume_in_use() because parse_volume()
> + # knows about 'unused*' and will return a valid volume ID whereas
> + # $conf->{$opt} is not guaranteed to contain a valid volume ID in this
> + # case.
> PVE::LXC::delete_mountpoint_volume($storecfg, $vmid, $conf->{$opt})
> - if !$class->is_volume_in_use($conf, $conf->{$opt}, 1, 1);
> + if !$class->is_volume_in_use($conf, $mp->{volume}, 1, 1);
> } elsif ($opt =~ m/^net(\d+)$/) {
> if ($have_sdn) {
> my $net = $class->parse_lxc_network($conf->{$opt});
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