[PATCH manager] ceph: cfg: fix config key filter returning all section keys

[Kefu Chai <k.chai@proxmox.com>]

The configdb loop fetching specific keys from 'config dump' contained
a tautology:

  $config->{$n_section}->{$n_name} = $value
      if defined $requested_keys->{$n_section} && $n_name eq $n_name;

The condition '$n_name eq $n_name' is always true, so the second clause
never actually filters by requested key. As a result, ALL keys from any
section that appeared in the request were returned to the caller instead
of only the specifically requested ones.

Compare with the correct pattern used just below in the ceph.conf path:

  $config->{$n_section}->{$n_key} = $config_file->{$section}->{$key}
      if $requested_keys->{$n_section}->{$n_key};

Fix: replace the tautological two-part condition with the same
single hash-dereference form. This is falsy when the section is absent
and falsy when the specific key is not requested, correctly filtering
the configdb output to only the keys the caller asked for.

Symptom: calling the '/ceph/cfg/value' API with a specific key like
'global:auth_cluster_required' would return every key in the [global]
section from the Ceph config database instead of only that one key.

Signed-off-by: Kefu Chai <k.chai@proxmox.com>
---
 PVE/API2/Ceph/Cfg.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/PVE/API2/Ceph/Cfg.pm b/PVE/API2/Ceph/Cfg.pm
index 9d16caf2..8798f12a 100644
--- a/PVE/API2/Ceph/Cfg.pm
+++ b/PVE/API2/Ceph/Cfg.pm
@@ -174,7 +174,7 @@ __PACKAGE__->register_method({
             my $n_name = $normalize->($name);
 
             $config->{$n_section}->{$n_name} = $value
-                if defined $requested_keys->{$n_section} && $n_name eq $n_name;
+                if $requested_keys->{$n_section}->{$n_name};
         }
 
         # read ceph.conf after config db as it has priority if settings are present in both
-- 
2.47.3