[pve-devel] [PATCH pve-common v3 1/2] network: add ip link and altname helpers

[Stefan Hanreich <s.hanreich@proxmox.com>]

Those helpers will be used by several other packages to implement the
altname support. Those helpers will also be used by the new
proxmox-network-interface-pinning tool which can be used for pinning
interface names.

Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>
---
 src/PVE/Network.pm | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/src/PVE/Network.pm b/src/PVE/Network.pm
index d084b36..ce87b93 100644
--- a/src/PVE/Network.pm
+++ b/src/PVE/Network.pm
@@ -973,4 +973,49 @@ sub is_ovs_bridge {
     die "failed to query OVS to determine type of '$bridge': $res\n";
 }
 
+sub ip_link_details {
+    my $link_json = '';
+
+    PVE::Tools::run_command(
+        ['ip', '-details', '-json', 'link', 'show'],
+        outfunc => sub {
+            $link_json .= shift;
+        }
+    );
+
+    my $links = JSON::decode_json($link_json);
+    my %ip_links = map { $_->{ifname} => $_ } $links->@*;
+
+    return \%ip_links;
+}
+
+sub ip_link_is_physical {
+    my ($ip_link) = @_;
+
+    # ether alone isn't enough, as virtual interfaces can also have link_type
+    # ether
+    return $ip_link->{link_type} eq 'ether'
+        && (!defined($ip_link->{linkinfo}) || !defined($ip_link->{linkinfo}->{info_kind}));
+}
+
+sub altname_mapping {
+    my ($ip_links) = @_;
+
+    $ip_links = ip_link_details() if !defined($ip_links);
+
+    my $altnames = {};
+
+    foreach my $iface_name (keys $ip_links->%*) {
+        my $iface = $ip_links->{$iface_name};
+
+        next if !$iface->{altnames};
+
+        foreach my $altname ($iface->{altnames}->@*) {
+            $altnames->{$altname} = $iface_name;
+        }
+    }
+
+    return $altnames;
+}
+
 1;
-- 
2.39.5


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