[PATCH pmg-api v2] fix #7187: report: add ethtool output for physical interfaces

[Erik Fastermann <e.fastermann@proxmox.com>]

Adding ethtool output to pmg-system-report provides visibility into
actual and supported NIC link speeds, making it much easier to diagnose
network performance issues, negotiation failures, and configuration
mismatches. It also reduces support back-and-forth.

The implementation mirrors the change in pve-manager, as the report
functionality is similar in both projects.

Signed-off-by: Erik Fastermann <e.fastermann@proxmox.com>
---

 NOTE: A similar patch was applied to all products:
 pmg, pve, pbs, pdm.

 changes since v1:
 * add a more detailed commit message explaining the rational
 * wrap in eval to prevent errors crashing the report
 * use PVE::Tools::shellquote to prevent injection errors

 src/PMG/Report.pm | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/PMG/Report.pm b/src/PMG/Report.pm
index 84d1b88..d5761e0 100644
--- a/src/PMG/Report.pm
+++ b/src/PMG/Report.pm
@@ -4,6 +4,7 @@ use strict;
 use warnings;
 use Mail::SpamAssassin::DnsResolver;
 
+use PVE::IPRoute2;
 use PVE::Tools;
 use PMG::Utils;
 
@@ -58,6 +59,20 @@ my $report_def = {
     ],
 };
 
+eval {
+    my $interfaces = PVE::IPRoute2::ip_link_details();
+
+    for my $iface (sort keys %{$interfaces}) {
+        if (PVE::IPRoute2::ip_link_is_physical($interfaces->{$iface})) {
+            push @{ $report_def->{network} }, "ethtool " . PVE::Tools::shellquote($iface);
+        }
+    }
+};
+
+if ($@) {
+    print STDERR "building ethtool commands failed: $@";
+}
+
 my @report_order = ('general', 'storage', 'network', 'firewall', 'cluster', 'pmg');
 
 my $report = '';
-- 
2.47.3