ON-16119: Optionally print remote IP and port in efct debugfs output

If the remote address is not specified then behaviour is as before, but
now if the address is specified it will print both the remote address
and port after the local details and in the same format.

src/lib/efhw/debugfs_efct.c

@@ -23,18 +23,25 @@ static int efct_debugfs_read_hw_filters(struct seq_file *file,
 {
   struct efct_hw_filter *filter;
   int i;
+  /* 24 bytes should be enough to store remote ipv4 address and port:
+   * 16 (ip address) + 1 (colon) + 5 (port) + 1 (trailing space) + 1 (null) */
+  char remote_ip_buf[24] = {0};
 
   for( i = 0; i < fs->hw_filters_n; i++ ) {
     filter = &fs->hw_filters[i];
-    if( filter->refcount > 0 )
-      seq_printf(file, "%03x: ref: %d\tid: %d/%llu\trxq: %d\t%s:%pI4:%d "
+    if( filter->refcount > 0 ) {
+      if( filter->remote_ip )
+        snprintf(remote_ip_buf, sizeof(remote_ip_buf), "%pI4:%d ",
+                 &filter->remote_ip, ntohs(filter->remote_port));
+      seq_printf(file, "%03x: ref: %d\tid: %d/%llu\trxq: %d\t%s:%pI4:%d %s"
                        "%pM %d\n", i,
                  filter->refcount, filter->hw_id, filter->drv_id, filter->rxq,
                  filter->ip_proto == IPPROTO_UDP ? "udp" :
                  filter->ip_proto == IPPROTO_TCP ? "tcp" : "unknown",
-                 &filter->local_ip, ntohs(filter->local_port), &filter->loc_mac,
-                 filter->outer_vlan < 0 ? -1 :
+                 &filter->local_ip, ntohs(filter->local_port), remote_ip_buf,
+                 &filter->loc_mac, filter->outer_vlan < 0 ? -1 :
                  ntohs(filter->outer_vlan & 0xffff));
+    }
   }
   return 0;
 }