[PATCH v2 storage 05/15] iscsi: add helper to get local config

[Mira Limbeck <m.limbeck@proxmox.com>]

local config contains either the targets and portals configured via
mapping for the local node or the ones configured via regular iSCSI
storage configuration

to help differentiate between a mapping and a simple iSCSI storage
configuration, is_mapping is set in the local config

Signed-off-by: Mira Limbeck <m.limbeck@proxmox.com>
---
 src/PVE/Storage/ISCSIPlugin.pm | 43 ++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/src/PVE/Storage/ISCSIPlugin.pm b/src/PVE/Storage/ISCSIPlugin.pm
index 88a35be..8e5cbfb 100644
--- a/src/PVE/Storage/ISCSIPlugin.pm
+++ b/src/PVE/Storage/ISCSIPlugin.pm
@@ -36,6 +36,49 @@ my sub assert_iscsi_support {
 # Example: 192.168.122.252:3260,1 iqn.2003-01.org.linux-iscsi.proxmox-nfs.x8664:sn.00567885ba8f
 my $ISCSI_TARGET_RE = qr/^(\S+:\d+)\,\S+\s+(\S+)\s*$/;
 
+my $get_local_config = sub {
+    my ($scfg) = @_;
+
+    die "neither 'target' nor 'mapping' defined\n"
+        if !defined($scfg->{target}) && !defined($scfg->{mapping});
+
+    my $res = {};
+    if ($scfg->{mapping}) {
+        $res->{is_mapping} = 1;
+
+        my $local_mappings =
+            PVE::Storage::Mapping::find_mapping_on_current_node($scfg->{mapping});
+        die "no iSCSI per-node entries found for mapping '$scfg->{mapping}'\n"
+            if !$local_mappings->@*;
+
+        for my $mapping ($local_mappings->@*) {
+            $res->{targets}->{ $mapping->{target} } = []
+                if !defined($res->{targets}->{ $mapping->{target} });
+            my $portals = [PVE::Tools::split_list($mapping->{portals})];
+
+            my $add_port = sub {
+                my ($val) = @_;
+
+                my ($ip, $port) = PVE::Tools::parse_host_and_port($val);
+                if (defined($port)) {
+                    return $val;
+                } else {
+                    # add default port
+                    return $ip . ':3260';
+                }
+            };
+            $portals->@* = map { $add_port->($_) } $portals->@*;
+
+            push $res->{targets}->{ $mapping->{target} }->@*, $portals->@*;
+        }
+        return $res;
+    } else {
+        $res->{is_mapping} = 0;
+        $res->{targets}->{ $scfg->{target} } = iscsi_portals($scfg->{target}, $scfg->{portal});
+        return $res;
+    }
+};
+
 sub iscsi_session_list {
     assert_iscsi_support();
 
-- 
2.47.3