[NETFILTER]: convert nfmark and conntrack mark to 32bit

As discussed at netconf'05, we convert nfmark and conntrack-mark to be
32bits even on 64bit architectures.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/netfilter_ipv4/ip_conntrack.h

@@ -171,7 +171,7 @@ struct ip_conntrack
 #endif /* CONFIG_IP_NF_NAT_NEEDED */
 
 #if defined(CONFIG_IP_NF_CONNTRACK_MARK)
-	unsigned long mark;
+	u_int32_t mark;
 #endif
 
 	/* Traversed often, so hopefully in different cacheline to top */

include/linux/skbuff.h

@@ -259,7 +259,7 @@ struct sk_buff {
 
 	void			(*destructor)(struct sk_buff *skb);
 #ifdef CONFIG_NETFILTER
-	unsigned long		nfmark;
+	__u32			nfmark;
 	__u32			nfcache;
 	__u32			nfctinfo;
 	struct nf_conntrack	*nfct;

net/ipv4/netfilter/ip_conntrack_standalone.c

@@ -185,7 +185,7 @@ static int ct_seq_show(struct seq_file *s, void *v)
 			return -ENOSPC;
 
 #if defined(CONFIG_IP_NF_CONNTRACK_MARK)
-	if (seq_printf(s, "mark=%lu ", conntrack->mark))
+	if (seq_printf(s, "mark=%u ", conntrack->mark))
 		return -ENOSPC;
 #endif
 

net/ipv4/netfilter/ipt_CLUSTERIP.c

@@ -367,7 +367,7 @@ target(struct sk_buff **pskb,
 #ifdef DEBUG_CLUSTERP
 	DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
 #endif
-	DEBUGP("hash=%u ct_hash=%lu ", hash, ct->mark);
+	DEBUGP("hash=%u ct_hash=%u ", hash, ct->mark);
 	if (!clusterip_responsible(cipinfo->config, hash)) {
 		DEBUGP("not responsible\n");
 		return NF_DROP;

net/ipv4/netfilter/ipt_CONNMARK.c

@@ -40,9 +40,9 @@ target(struct sk_buff **pskb,
        void *userinfo)
 {
 	const struct ipt_connmark_target_info *markinfo = targinfo;
-	unsigned long diff;
-	unsigned long nfmark;
-	unsigned long newmark;
+	u_int32_t diff;
+	u_int32_t nfmark;
+	u_int32_t newmark;
 
 	enum ip_conntrack_info ctinfo;
 	struct ip_conntrack *ct = ip_conntrack_get((*pskb), &ctinfo);
@@ -94,6 +94,11 @@ checkentry(const char *tablename,
 	    }
 	}
 
+	if (matchinfo->mark > 0xffffffff || matchinfo->mask > 0xffffffff) {
+		printk(KERN_WARNING "CONNMARK: Only supports 32bit mark\n");
+		return 0;
+	}
+
 	return 1;
 }
 

net/ipv4/netfilter/ipt_MARK.c

@@ -76,6 +76,8 @@ checkentry_v0(const char *tablename,
 	      unsigned int targinfosize,
 	      unsigned int hook_mask)
 {
+	struct ipt_mark_target_info *markinfo = targinfo;
+
 	if (targinfosize != IPT_ALIGN(sizeof(struct ipt_mark_target_info))) {
 		printk(KERN_WARNING "MARK: targinfosize %u != %Zu\n",
 		       targinfosize,
@@ -88,6 +90,11 @@ checkentry_v0(const char *tablename,
 		return 0;
 	}
 
+	if (markinfo->mark > 0xffffffff) {
+		printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n");
+		return 0;
+	}
+
 	return 1;
 }
 
@@ -120,6 +127,11 @@ checkentry_v1(const char *tablename,
 		return 0;
 	}
 
+	if (markinfo->mark > 0xffffffff) {
+		printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n");
+		return 0;
+	}
+
 	return 1;
 }
 

net/ipv4/netfilter/ipt_connmark.c

@@ -54,9 +54,16 @@ checkentry(const char *tablename,
 	   unsigned int matchsize,
 	   unsigned int hook_mask)
 {
+	struct ipt_connmark_info *cm = 
+				(struct ipt_connmark_info *)matchinfo;
 	if (matchsize != IPT_ALIGN(sizeof(struct ipt_connmark_info)))
 		return 0;
 
+	if (cm->mark > 0xffffffff || cm->mask > 0xffffffff) {
+		printk(KERN_WARNING "connmark: only support 32bit mark\n");
+		return 0;
+	}
+
 	return 1;
 }
 

net/ipv4/netfilter/ipt_mark.c

@@ -37,9 +37,16 @@ checkentry(const char *tablename,
            unsigned int matchsize,
            unsigned int hook_mask)
 {
+	struct ipt_mark_info *minfo = (struct ipt_mark_info *) matchinfo;
+
 	if (matchsize != IPT_ALIGN(sizeof(struct ipt_mark_info)))
 		return 0;
 
+	if (minfo->mark > 0xffffffff || minfo->mask > 0xffffffff) {
+		printk(KERN_WARNING "mark: only supports 32bit mark\n");
+		return 0;
+	}
+
 	return 1;
 }