[pve-devel] [PATCH] fix #957 iscsi: don't check tcp connection directly

[Victor Seva via pve-devel <pve-devel@lists.proxmox.com>]

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From: Victor Seva <linuxmaniac@torreviejawireless.org>
To: pve-devel@lists.proxmox.com
Subject: [PATCH] fix #957 iscsi: don't check tcp connection directly
Date: Wed,  5 Mar 2025 22:59:37 +0100
Message-ID: <20250305215937.53650-1-linuxmaniac@torreviejawireless.org>

pvestatd is checking this every 10 seconds. This check
produces a lot of noise at the iscsi server logging.

Use iscsiadm command to check the sessions status instead

Signed-off-by: Victor Seva <linuxmaniac@torreviejawireless.org>
---
 src/PVE/Storage/ISCSIPlugin.pm | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

diff --git a/src/PVE/Storage/ISCSIPlugin.pm b/src/PVE/Storage/ISCSIPlugin.pm
index eb70453..6a69653 100644
--- a/src/PVE/Storage/ISCSIPlugin.pm
+++ b/src/PVE/Storage/ISCSIPlugin.pm
@@ -66,6 +66,25 @@ sub iscsi_test_portal {
     return PVE::Network::tcp_ping($server, $port || 3260, 2);
 }
 
+sub iscsi_test_session {
+    my ($portal, $sid) = @_;
+    my $cmd = [$ISCSIADM, '--mode', 'session', '--sid', $sid, '-P1'];
+
+    my $res = 0;
+    eval {
+        run_command($cmd, errmsg => 'iscsi session test failed', outfunc => sub {
+            my $line = shift;
+            if ($line =~ m/^\s+iSCSI Session State: LOGGED_IN\s*$/) {
+                $res = 1;
+            }
+        });
+    };
+    if (my $err = $@) {
+        die $err;
+    };
+    return $res;
+}
+
 sub iscsi_portals {
     my ($target, $portal_in) = @_;
 
@@ -561,10 +580,13 @@ sub check_connection {
     my ($class, $storeid, $scfg) = @_;
 
     my $portals = iscsi_portals($scfg->{target}, $scfg->{portal});
-
+    my $cache = {};
     for my $portal (@$portals) {
-	my $result = iscsi_test_portal($portal);
-	return $result if $result;
+        my $sessions = iscsi_session($cache, $scfg->{target});
+        for my $session (@$sessions) {
+            my $result = iscsi_test_session($portal, $session->{session_id});
+            return $result if $result;
+        }
     }
 
     return 0;
-- 
2.43.0



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