[NETFILTER]: {ip,ip6}t_LOG: print MARK value in log output

Dump the mark value in log messages similar to nfnetlink_log. This
is useful for debugging complex setups where marks are used for
routing or traffic classification.

Signed-off-by: Patrick McHardy <kaber@trash.net>

2 files changed, 10 insertions, 2 deletions

diff --git a/net/ipv4/netfilter/ipt_LOG.c b/net/ipv4/netfilter/ipt_LOG.c
index b38d7850f506..c40e233e271b 100644
--- a/net/ipv4/netfilter/ipt_LOG.c
+++ b/net/ipv4/netfilter/ipt_LOG.c
@@ -338,12 +338,16 @@ static void dump_packet(const struct nf_loginfo *info,
         if ((logflags & IPT_LOG_UID) && !iphoff && skb->sk) {
                 read_lock_bh(&skb->sk->sk_callback_lock);
                 if (skb->sk->sk_socket && skb->sk->sk_socket->file)
-                        printk("UID=%u GID=%u",
+                        printk("UID=%u GID=%u ",
                                 skb->sk->sk_socket->file->f_uid,
                                 skb->sk->sk_socket->file->f_gid);
                 read_unlock_bh(&skb->sk->sk_callback_lock);
         }
 
+        /* Max length: 16 "MARK=0xFFFFFFFF " */
+        if (!iphoff && skb->mark)
+                printk("MARK=0x%x ", skb->mark);
+
         /* Proto    Max log string length */
         /* IP:      40+46+6+11+127 = 230 */
         /* TCP:     10+max(25,20+30+13+9+32+11+127) = 252 */
diff --git a/net/ipv6/netfilter/ip6t_LOG.c b/net/ipv6/netfilter/ip6t_LOG.c
index 86a613810b69..3a2316974f83 100644
--- a/net/ipv6/netfilter/ip6t_LOG.c
+++ b/net/ipv6/netfilter/ip6t_LOG.c
@@ -363,11 +363,15 @@ static void dump_packet(const struct nf_loginfo *info,
         if ((logflags & IP6T_LOG_UID) && recurse && skb->sk) {
                 read_lock_bh(&skb->sk->sk_callback_lock);
                 if (skb->sk->sk_socket && skb->sk->sk_socket->file)
-                        printk("UID=%u GID=%u",
+                        printk("UID=%u GID=%u ",
                                 skb->sk->sk_socket->file->f_uid,
                                 skb->sk->sk_socket->file->f_gid);
                 read_unlock_bh(&skb->sk->sk_callback_lock);
         }
+
+        /* Max length: 16 "MARK=0xFFFFFFFF " */
+        if (!recurse && skb->mark)
+                printk("MARK=0x%x ", skb->mark);
 }
 
 static struct nf_loginfo default_loginfo = {