netfilter: Use unsigned types for hooknum and pf vars

and (try to) consistently use u_int8_t for the L3 family.

Signed-off-by: Jan Engelhardt <[e-mail]>
Signed-off-by: Patrick McHardy <[e-mail]>

include/linux/netfilter.h

···
 	/* User fills in from here down. */
 	nf_hookfn *hook;
 	struct module *owner;
-	int pf;
-	int hooknum;
+	u_int8_t pf;
+	unsigned int hooknum;
 	/* Hooks are ordered in ascending priority. */
 	int priority;
 };
···
 {
 	struct list_head list;
 
-	int pf;
+	u_int8_t pf;
 
 	/* Non-inclusive ranges: use 0/0/NULL to never get called. */
 	int set_optmin;
···
 
 extern struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];
 
-int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb,
+int nf_hook_slow(u_int8_t pf, unsigned int hook, struct sk_buff *skb,
 		 struct net_device *indev, struct net_device *outdev,
 		 int (*okfn)(struct sk_buff *), int thresh);
 
···
  *	okfn must be invoked by the caller in this case.  Any other return
  *	value indicates the packet has been consumed by the hook.
  */
-static inline int nf_hook_thresh(int pf, unsigned int hook,
+static inline int nf_hook_thresh(u_int8_t pf, unsigned int hook,
 				 struct sk_buff *skb,
 				 struct net_device *indev,
 				 struct net_device *outdev,
···
 	return nf_hook_slow(pf, hook, skb, indev, outdev, okfn, thresh);
 }
 
-static inline int nf_hook(int pf, unsigned int hook, struct sk_buff *skb,
+static inline int nf_hook(u_int8_t pf, unsigned int hook, struct sk_buff *skb,
 			  struct net_device *indev, struct net_device *outdev,
 			  int (*okfn)(struct sk_buff *))
 {
···
 	NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, INT_MIN)
 
 /* Call setsockopt() */
-int nf_setsockopt(struct sock *sk, int pf, int optval, char __user *opt, 
+int nf_setsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt,
 		  int len);
-int nf_getsockopt(struct sock *sk, int pf, int optval, char __user *opt,
+int nf_getsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt,
 		  int *len);
 
-int compat_nf_setsockopt(struct sock *sk, int pf, int optval,
+int compat_nf_setsockopt(struct sock *sk, u_int8_t pf, int optval,
 		char __user *opt, int len);
-int compat_nf_getsockopt(struct sock *sk, int pf, int optval,
+int compat_nf_getsockopt(struct sock *sk, u_int8_t pf, int optval,
 		char __user *opt, int *len);
 
 /* Call this before modifying an existing packet: ensures it is
···
 extern void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *);
 
 static inline void
-nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, int family)
+nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family)
 {
 #ifdef CONFIG_NF_NAT_NEEDED
 	void (*decodefn)(struct sk_buff *, struct flowi *);
···
 #else /* !CONFIG_NETFILTER */
 #define NF_HOOK(pf, hook, skb, indev, outdev, okfn) (okfn)(skb)
 #define NF_HOOK_COND(pf, hook, skb, indev, outdev, okfn, cond) (okfn)(skb)
-static inline int nf_hook_thresh(int pf, unsigned int hook,
+static inline int nf_hook_thresh(u_int8_t pf, unsigned int hook,
 				 struct sk_buff *skb,
 				 struct net_device *indev,
 				 struct net_device *outdev,
···
 {
 	return okfn(skb);
 }
-static inline int nf_hook(int pf, unsigned int hook, struct sk_buff *skb,
+static inline int nf_hook(u_int8_t pf, unsigned int hook, struct sk_buff *skb,
 			  struct net_device *indev, struct net_device *outdev,
 			  int (*okfn)(struct sk_buff *))
 {
···
 }
 struct flowi;
 static inline void
-nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, int family) {}
+nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family)
+{
+}
 #endif /*CONFIG_NETFILTER*/
 
 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)

include/linux/netfilter/x_tables.h

···
 	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
 	struct module *me;
 
-	int af;		/* address/protocol family */
+	u_int8_t af;		/* address/protocol family */
 };
 
 #include <linux/netfilter_ipv4.h>
···
 					      struct xt_table_info *newinfo,
 					      int *error);
 
-extern struct xt_match *xt_find_match(int af, const char *name, u8 revision);
-extern struct xt_target *xt_find_target(int af, const char *name, u8 revision);
-extern struct xt_target *xt_request_find_target(int af, const char *name, 
+extern struct xt_match *xt_find_match(u8 af, const char *name, u8 revision);
+extern struct xt_target *xt_find_target(u8 af, const char *name, u8 revision);
+extern struct xt_target *xt_request_find_target(u8 af, const char *name,
 						u8 revision);
-extern int xt_find_revision(int af, const char *name, u8 revision, int target,
-			    int *err);
+extern int xt_find_revision(u8 af, const char *name, u8 revision,
+			    int target, int *err);
 
-extern struct xt_table *xt_find_table_lock(struct net *net, int af,
+extern struct xt_table *xt_find_table_lock(struct net *net, u_int8_t af,
 					   const char *name);
 extern void xt_table_unlock(struct xt_table *t);
 
-extern int xt_proto_init(struct net *net, int af);
-extern void xt_proto_fini(struct net *net, int af);
+extern int xt_proto_init(struct net *net, u_int8_t af);
+extern void xt_proto_fini(struct net *net, u_int8_t af);
 
 extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
 extern void xt_free_table_info(struct xt_table_info *info);
···
 #define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \
 		& ~(__alignof__(struct compat_xt_counters)-1))
 
-extern void xt_compat_lock(int af);
-extern void xt_compat_unlock(int af);
+extern void xt_compat_lock(u_int8_t af);
+extern void xt_compat_unlock(u_int8_t af);
 
-extern int xt_compat_add_offset(int af, unsigned int offset, short delta);
-extern void xt_compat_flush_offsets(int af);
-extern short xt_compat_calc_jump(int af, unsigned int offset);
+extern int xt_compat_add_offset(u_int8_t af, unsigned int offset, short delta);
+extern void xt_compat_flush_offsets(u_int8_t af);
+extern short xt_compat_calc_jump(u_int8_t af, unsigned int offset);
 
 extern int xt_compat_match_offset(const struct xt_match *match);
 extern int xt_compat_match_from_user(struct xt_entry_match *m,

include/net/netfilter/nf_conntrack_core.h

···
 /* This header is used to share core functionality between the
    standalone connection tracking module, and the compatibility layer's use
    of connection tracking. */
-extern unsigned int nf_conntrack_in(int pf,
+extern unsigned int nf_conntrack_in(u_int8_t pf,
 				    unsigned int hooknum,
 				    struct sk_buff *skb);
 

include/net/netfilter/nf_conntrack_expect.h

···
 /* Allocate space for an expectation: this is mandatory before calling
    nf_ct_expect_related.  You will have to call put afterwards. */
 struct nf_conntrack_expect *nf_ct_expect_alloc(struct nf_conn *me);
-void nf_ct_expect_init(struct nf_conntrack_expect *, unsigned int, int,
+void nf_ct_expect_init(struct nf_conntrack_expect *, unsigned int, u_int8_t,
 		       const union nf_inet_addr *,
 		       const union nf_inet_addr *,
 		       u_int8_t, const __be16 *, const __be16 *);

include/net/netfilter/nf_conntrack_l4proto.h

···
 		      const struct sk_buff *skb,
 		      unsigned int dataoff,
 		      enum ip_conntrack_info ctinfo,
-		      int pf,
+		      u_int8_t pf,
 		      unsigned int hooknum);
 
 	/* Called when a new connection for this protocol found;
···
 
 	int (*error)(struct sk_buff *skb, unsigned int dataoff,
 		     enum ip_conntrack_info *ctinfo,
-		     int pf, unsigned int hooknum);
+		     u_int8_t pf, unsigned int hooknum);
 
 	/* Print out the per-protocol part of the tuple. Return like seq_* */
 	int (*print_tuple)(struct seq_file *s,

include/net/netfilter/nf_log.h

···
 	} u;
 };
 
-typedef void nf_logfn(unsigned int pf,
+typedef void nf_logfn(u_int8_t pf,
 		      unsigned int hooknum,
 		      const struct sk_buff *skb,
 		      const struct net_device *in,
···
 };
 
 /* Function to register/unregister log function. */
-int nf_log_register(int pf, const struct nf_logger *logger);
+int nf_log_register(u_int8_t pf, const struct nf_logger *logger);
 void nf_log_unregister(const struct nf_logger *logger);
-void nf_log_unregister_pf(int pf);
+void nf_log_unregister_pf(u_int8_t pf);
 
 /* Calls the registered backend logging function */
-void nf_log_packet(int pf,
+void nf_log_packet(u_int8_t pf,
 		   unsigned int hooknum,
 		   const struct sk_buff *skb,
 		   const struct net_device *in,

include/net/netfilter/nf_queue.h

···
 	unsigned int		id;
 
 	struct nf_hook_ops	*elem;
-	int			pf;
+	u_int8_t		pf;
 	unsigned int		hook;
 	struct net_device	*indev;
 	struct net_device	*outdev;
···
 	char			*name;
 };
 
-extern int nf_register_queue_handler(int pf,
+extern int nf_register_queue_handler(u_int8_t pf,
 				     const struct nf_queue_handler *qh);
-extern int nf_unregister_queue_handler(int pf,
+extern int nf_unregister_queue_handler(u_int8_t pf,
 				       const struct nf_queue_handler *qh);
 extern void nf_unregister_queue_handlers(const struct nf_queue_handler *qh);
 extern void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict);

net/bridge/br_netfilter.c

···
 {
 	struct nf_bridge_info *nf_bridge;
 	struct net_device *parent;
-	int pf;
+	u_int8_t pf;
 
 	if (!skb->nf_bridge)
 		return NF_ACCEPT;
···
 {
 	struct nf_bridge_info *nf_bridge = skb->nf_bridge;
 	struct net_device *realoutdev = bridge_parent(skb->dev);
-	int pf;
+	u_int8_t pf;
 
 #ifdef CONFIG_NETFILTER_DEBUG
 	/* Be very paranoid. This probably won't happen anymore, but let's

net/bridge/netfilter/ebt_log.c

···
 
 #define myNIPQUAD(a) a[0], a[1], a[2], a[3]
 static void
-ebt_log_packet(unsigned int pf, unsigned int hooknum,
+ebt_log_packet(u_int8_t pf, unsigned int hooknum,
    const struct sk_buff *skb, const struct net_device *in,
    const struct net_device *out, const struct nf_loginfo *loginfo,
    const char *prefix)

net/bridge/netfilter/ebt_ulog.c

···
 }
 
 /* this function is registered with the netfilter core */
-static void ebt_log_packet(unsigned int pf, unsigned int hooknum,
+static void ebt_log_packet(u_int8_t pf, unsigned int hooknum,
    const struct sk_buff *skb, const struct net_device *in,
    const struct net_device *out, const struct nf_loginfo *li,
    const char *prefix)

net/ipv4/netfilter/ipt_LOG.c

···
 };
 
 static void
-ipt_log_packet(unsigned int pf,
+ipt_log_packet(u_int8_t pf,
 	       unsigned int hooknum,
 	       const struct sk_buff *skb,
 	       const struct net_device *in,

net/ipv4/netfilter/ipt_ULOG.c

···
 	return XT_CONTINUE;
 }
 
-static void ipt_logfn(unsigned int pf,
+static void ipt_logfn(u_int8_t pf,
 		      unsigned int hooknum,
 		      const struct sk_buff *skb,
 		      const struct net_device *in,

net/ipv4/netfilter/nf_conntrack_proto_icmp.c

···
 		       const struct sk_buff *skb,
 		       unsigned int dataoff,
 		       enum ip_conntrack_info ctinfo,
-		       int pf,
+		       u_int8_t pf,
 		       unsigned int hooknum)
 {
 	/* Try to delete connection immediately after all replies:
···
 /* Small and modified version of icmp_rcv */
 static int
 icmp_error(struct sk_buff *skb, unsigned int dataoff,
-	   enum ip_conntrack_info *ctinfo, int pf, unsigned int hooknum)
+	   enum ip_conntrack_info *ctinfo, u_int8_t pf, unsigned int hooknum)
 {
 	const struct icmphdr *icmph;
 	struct icmphdr _ih;

net/ipv6/netfilter/ip6t_LOG.c

···
 };
 
 static void
-ip6t_log_packet(unsigned int pf,
+ip6t_log_packet(u_int8_t pf,
 		unsigned int hooknum,
 		const struct sk_buff *skb,
 		const struct net_device *in,

net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c

···
 		       const struct sk_buff *skb,
 		       unsigned int dataoff,
 		       enum ip_conntrack_info ctinfo,
-		       int pf,
+		       u_int8_t pf,
 		       unsigned int hooknum)
 {
 	/* Try to delete connection immediately after all replies:
···
 
 static int
 icmpv6_error(struct sk_buff *skb, unsigned int dataoff,
-	     enum ip_conntrack_info *ctinfo, int pf, unsigned int hooknum)
+	     enum ip_conntrack_info *ctinfo, u_int8_t pf, unsigned int hooknum)
 {
 	const struct icmp6hdr *icmp6h;
 	struct icmp6hdr _ih;

net/netfilter/core.c

···
 
 unsigned int nf_iterate(struct list_head *head,
 			struct sk_buff *skb,
-			int hook,
+			unsigned int hook,
 			const struct net_device *indev,
 			const struct net_device *outdev,
 			struct list_head **i,
···
 
 /* Returns 1 if okfn() needs to be executed by the caller,
  * -EPERM for NF_DROP, 0 otherwise. */
-int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb,
+int nf_hook_slow(u_int8_t pf, unsigned int hook, struct sk_buff *skb,
 		 struct net_device *indev,
 		 struct net_device *outdev,
 		 int (*okfn)(struct sk_buff *),

net/netfilter/nf_conntrack_core.c

···
 }
 
 unsigned int
-nf_conntrack_in(int pf, unsigned int hooknum, struct sk_buff *skb)
+nf_conntrack_in(u_int8_t pf, unsigned int hooknum, struct sk_buff *skb)
 {
 	struct nf_conn *ct;
 	enum ip_conntrack_info ctinfo;
···
 	}
 
 	/* rcu_read_lock()ed by nf_hook_slow */
-	l3proto = __nf_ct_l3proto_find((u_int16_t)pf);
+	l3proto = __nf_ct_l3proto_find(pf);
 	ret = l3proto->get_l4proto(skb, skb_network_offset(skb),
 				   &dataoff, &protonum);
 	if (ret <= 0) {
···
 		return -ret;
 	}
 
-	l4proto = __nf_ct_l4proto_find((u_int16_t)pf, protonum);
+	l4proto = __nf_ct_l4proto_find(pf, protonum);
 
 	/* It may be an special packet, error, unclean...
 	 * inverse of the return code tells to the netfilter

net/netfilter/nf_conntrack_expect.c

···
 EXPORT_SYMBOL_GPL(nf_ct_expect_alloc);
 
 void nf_ct_expect_init(struct nf_conntrack_expect *exp, unsigned int class,
-		       int family,
+		       u_int8_t family,
 		       const union nf_inet_addr *saddr,
 		       const union nf_inet_addr *daddr,
 		       u_int8_t proto, const __be16 *src, const __be16 *dst)

net/netfilter/nf_conntrack_h323_main.c

···
 /* If the calling party is on the same side of the forward-to party,
  * we don't need to track the second call */
 static int callforward_do_filter(const union nf_inet_addr *src,
-                                 const union nf_inet_addr *dst, int family)
+				 const union nf_inet_addr *dst,
+				 u_int8_t family)
 {
 	const struct nf_afinfo *afinfo;
 	struct flowi fl1, fl2;

net/netfilter/nf_conntrack_proto_dccp.c

···
 
 static int dccp_packet(struct nf_conn *ct, const struct sk_buff *skb,
 		       unsigned int dataoff, enum ip_conntrack_info ctinfo,
-		       int pf, unsigned int hooknum)
+		       u_int8_t pf, unsigned int hooknum)
 {
 	enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
 	struct dccp_hdr _dh, *dh;
···
 }
 
 static int dccp_error(struct sk_buff *skb, unsigned int dataoff,
-		      enum ip_conntrack_info *ctinfo, int pf,
+		      enum ip_conntrack_info *ctinfo, u_int8_t pf,
 		      unsigned int hooknum)
 {
 	struct dccp_hdr _dh, *dh;

net/netfilter/nf_conntrack_proto_generic.c

···
 		  const struct sk_buff *skb,
 		  unsigned int dataoff,
 		  enum ip_conntrack_info ctinfo,
-		  int pf,
+		  u_int8_t pf,
 		  unsigned int hooknum)
 {
 	nf_ct_refresh_acct(ct, ctinfo, skb, nf_ct_generic_timeout);

net/netfilter/nf_conntrack_proto_gre.c

···
 		      const struct sk_buff *skb,
 		      unsigned int dataoff,
 		      enum ip_conntrack_info ctinfo,
-		      int pf,
+		      u_int8_t pf,
 		      unsigned int hooknum)
 {
 	/* If we've seen traffic both ways, this is a GRE connection.

net/netfilter/nf_conntrack_proto_sctp.c

···
 		       const struct sk_buff *skb,
 		       unsigned int dataoff,
 		       enum ip_conntrack_info ctinfo,
-		       int pf,
+		       u_int8_t pf,
 		       unsigned int hooknum)
 {
 	enum sctp_conntrack new_state, old_state;

net/netfilter/nf_conntrack_proto_tcp.c

···
 			  const struct sk_buff *skb,
 			  unsigned int dataoff,
 			  const struct tcphdr *tcph,
-			  int pf)
+			  u_int8_t pf)
 {
 	struct ip_ct_tcp_state *sender = &state->seen[dir];
 	struct ip_ct_tcp_state *receiver = &state->seen[!dir];
···
 static int tcp_error(struct sk_buff *skb,
 		     unsigned int dataoff,
 		     enum ip_conntrack_info *ctinfo,
-		     int pf,
+		     u_int8_t pf,
 		     unsigned int hooknum)
 {
 	const struct tcphdr *th;
···
 		      const struct sk_buff *skb,
 		      unsigned int dataoff,
 		      enum ip_conntrack_info ctinfo,
-		      int pf,
+		      u_int8_t pf,
 		      unsigned int hooknum)
 {
 	struct nf_conntrack_tuple *tuple;

net/netfilter/nf_conntrack_proto_udp.c

···
 		      const struct sk_buff *skb,
 		      unsigned int dataoff,
 		      enum ip_conntrack_info ctinfo,
-		      int pf,
+		      u_int8_t pf,
 		      unsigned int hooknum)
 {
 	/* If we've seen traffic both ways, this is some kind of UDP
···
 
 static int udp_error(struct sk_buff *skb, unsigned int dataoff,
 		     enum ip_conntrack_info *ctinfo,
-		     int pf,
+		     u_int8_t pf,
 		     unsigned int hooknum)
 {
 	unsigned int udplen = skb->len - dataoff;

net/netfilter/nf_conntrack_proto_udplite.c

···
 			  const struct sk_buff *skb,
 			  unsigned int dataoff,
 			  enum ip_conntrack_info ctinfo,
-			  int pf,
+			  u_int8_t pf,
 			  unsigned int hooknum)
 {
 	/* If we've seen traffic both ways, this is some kind of UDP
···
 
 static int udplite_error(struct sk_buff *skb, unsigned int dataoff,
 			 enum ip_conntrack_info *ctinfo,
-			 int pf,
+			 u_int8_t pf,
 			 unsigned int hooknum)
 {
 	unsigned int udplen = skb->len - dataoff;

net/netfilter/nf_internals.h

···
 /* core.c */
 extern unsigned int nf_iterate(struct list_head *head,
 				struct sk_buff *skb,
-				int hook,
+				unsigned int hook,
 				const struct net_device *indev,
 				const struct net_device *outdev,
 				struct list_head **i,
···
 /* nf_queue.c */
 extern int nf_queue(struct sk_buff *skb,
 		    struct list_head *elem,
-		    int pf, unsigned int hook,
+		    u_int8_t pf, unsigned int hook,
 		    struct net_device *indev,
 		    struct net_device *outdev,
 		    int (*okfn)(struct sk_buff *),

net/netfilter/nf_log.c

···
 
 /* return EBUSY if somebody else is registered, EEXIST if the same logger
  * is registred, 0 on success. */
-int nf_log_register(int pf, const struct nf_logger *logger)
+int nf_log_register(u_int8_t pf, const struct nf_logger *logger)
 {
 	int ret;
 
···
 }
 EXPORT_SYMBOL(nf_log_register);
 
-void nf_log_unregister_pf(int pf)
+void nf_log_unregister_pf(u_int8_t pf)
 {
 	if (pf >= NPROTO)
 		return;
···
 }
 EXPORT_SYMBOL(nf_log_unregister);
 
-void nf_log_packet(int pf,
+void nf_log_packet(u_int8_t pf,
 		   unsigned int hooknum,
 		   const struct sk_buff *skb,
 		   const struct net_device *in,

net/netfilter/nf_queue.c

···
 
 /* return EBUSY when somebody else is registered, return EEXIST if the
  * same handler is registered, return 0 in case of success. */
-int nf_register_queue_handler(int pf, const struct nf_queue_handler *qh)
+int nf_register_queue_handler(u_int8_t pf, const struct nf_queue_handler *qh)
 {
 	int ret;
 
···
 EXPORT_SYMBOL(nf_register_queue_handler);
 
 /* The caller must flush their queue before this */
-int nf_unregister_queue_handler(int pf, const struct nf_queue_handler *qh)
+int nf_unregister_queue_handler(u_int8_t pf, const struct nf_queue_handler *qh)
 {
 	if (pf >= NPROTO)
 		return -EINVAL;
···
 
 void nf_unregister_queue_handlers(const struct nf_queue_handler *qh)
 {
-	int pf;
+	u_int8_t pf;
 
 	mutex_lock(&queue_handler_mutex);
 	for (pf = 0; pf < NPROTO; pf++)  {
···
  */
 static int __nf_queue(struct sk_buff *skb,
 		      struct list_head *elem,
-		      int pf, unsigned int hook,
+		      u_int8_t pf, unsigned int hook,
 		      struct net_device *indev,
 		      struct net_device *outdev,
 		      int (*okfn)(struct sk_buff *),
···
 
 int nf_queue(struct sk_buff *skb,
 	     struct list_head *elem,
-	     int pf, unsigned int hook,
+	     u_int8_t pf, unsigned int hook,
 	     struct net_device *indev,
 	     struct net_device *outdev,
 	     int (*okfn)(struct sk_buff *),

net/netfilter/nf_sockopt.c

···
 }
 EXPORT_SYMBOL(nf_unregister_sockopt);
 
-static struct nf_sockopt_ops *nf_sockopt_find(struct sock *sk, int pf,
+static struct nf_sockopt_ops *nf_sockopt_find(struct sock *sk, u_int8_t pf,
 		int val, int get)
 {
 	struct nf_sockopt_ops *ops;
···
 }
 
 /* Call get/setsockopt() */
-static int nf_sockopt(struct sock *sk, int pf, int val,
+static int nf_sockopt(struct sock *sk, u_int8_t pf, int val,
 		      char __user *opt, int *len, int get)
 {
 	struct nf_sockopt_ops *ops;
···
 	return ret;
 }
 
-int nf_setsockopt(struct sock *sk, int pf, int val, char __user *opt,
+int nf_setsockopt(struct sock *sk, u_int8_t pf, int val, char __user *opt,
 		  int len)
 {
 	return nf_sockopt(sk, pf, val, opt, &len, 0);
 }
 EXPORT_SYMBOL(nf_setsockopt);
 
-int nf_getsockopt(struct sock *sk, int pf, int val, char __user *opt, int *len)
+int nf_getsockopt(struct sock *sk, u_int8_t pf, int val, char __user *opt,
+		  int *len)
 {
 	return nf_sockopt(sk, pf, val, opt, len, 1);
 }
 EXPORT_SYMBOL(nf_getsockopt);
 
 #ifdef CONFIG_COMPAT
-static int compat_nf_sockopt(struct sock *sk, int pf, int val,
+static int compat_nf_sockopt(struct sock *sk, u_int8_t pf, int val,
 			     char __user *opt, int *len, int get)
 {
 	struct nf_sockopt_ops *ops;
···
 	return ret;
 }
 
-int compat_nf_setsockopt(struct sock *sk, int pf,
+int compat_nf_setsockopt(struct sock *sk, u_int8_t pf,
 		int val, char __user *opt, int len)
 {
 	return compat_nf_sockopt(sk, pf, val, opt, &len, 0);
 }
 EXPORT_SYMBOL(compat_nf_setsockopt);
 
-int compat_nf_getsockopt(struct sock *sk, int pf,
+int compat_nf_getsockopt(struct sock *sk, u_int8_t pf,
 		int val, char __user *opt, int *len)
 {
 	return compat_nf_sockopt(sk, pf, val, opt, len, 1);

net/netfilter/nfnetlink_log.c

···
 __build_packet_message(struct nfulnl_instance *inst,
 			const struct sk_buff *skb,
 			unsigned int data_len,
-			unsigned int pf,
+			u_int8_t pf,
 			unsigned int hooknum,
 			const struct net_device *indev,
 			const struct net_device *outdev,
···
 
 /* log handler for internal netfilter logging api */
 static void
-nfulnl_log_packet(unsigned int pf,
+nfulnl_log_packet(u_int8_t pf,
 		  unsigned int hooknum,
 		  const struct sk_buff *skb,
 		  const struct net_device *in,

net/netfilter/x_tables.c

···
 int
 xt_register_target(struct xt_target *target)
 {
-	int ret, af = target->family;
+	u_int8_t af = target->family;
+	int ret;
 
 	ret = mutex_lock_interruptible(&xt[af].mutex);
 	if (ret != 0)
···
 void
 xt_unregister_target(struct xt_target *target)
 {
-	int af = target->family;
+	u_int8_t af = target->family;
 
 	mutex_lock(&xt[af].mutex);
 	list_del(&target->list);
···
 int
 xt_register_match(struct xt_match *match)
 {
-	int ret, af = match->family;
+	u_int8_t af = match->family;
+	int ret;
 
 	ret = mutex_lock_interruptible(&xt[af].mutex);
 	if (ret != 0)
···
 void
 xt_unregister_match(struct xt_match *match)
 {
-	int af =  match->family;
+	u_int8_t af = match->family;
 
 	mutex_lock(&xt[af].mutex);
 	list_del(&match->list);
···
  */
 
 /* Find match, grabs ref.  Returns ERR_PTR() on error. */
-struct xt_match *xt_find_match(int af, const char *name, u8 revision)
+struct xt_match *xt_find_match(u8 af, const char *name, u8 revision)
 {
 	struct xt_match *m;
 	int err = 0;
···
 EXPORT_SYMBOL(xt_find_match);
 
 /* Find target, grabs ref.  Returns ERR_PTR() on error. */
-struct xt_target *xt_find_target(int af, const char *name, u8 revision)
+struct xt_target *xt_find_target(u8 af, const char *name, u8 revision)
 {
 	struct xt_target *t;
 	int err = 0;
···
 }
 EXPORT_SYMBOL(xt_find_target);
 
-struct xt_target *xt_request_find_target(int af, const char *name, u8 revision)
+struct xt_target *xt_request_find_target(u8 af, const char *name, u8 revision)
 {
 	struct xt_target *target;
 
···
 }
 EXPORT_SYMBOL_GPL(xt_request_find_target);
 
-static int match_revfn(int af, const char *name, u8 revision, int *bestp)
+static int match_revfn(u8 af, const char *name, u8 revision, int *bestp)
 {
 	const struct xt_match *m;
 	int have_rev = 0;
···
 	return have_rev;
 }
 
-static int target_revfn(int af, const char *name, u8 revision, int *bestp)
+static int target_revfn(u8 af, const char *name, u8 revision, int *bestp)
 {
 	const struct xt_target *t;
 	int have_rev = 0;
···
 }
 
 /* Returns true or false (if no such extension at all) */
-int xt_find_revision(int af, const char *name, u8 revision, int target,
+int xt_find_revision(u8 af, const char *name, u8 revision, int target,
 		     int *err)
 {
 	int have_rev, best = -1;
···
 EXPORT_SYMBOL_GPL(xt_check_match);
 
 #ifdef CONFIG_COMPAT
-int xt_compat_add_offset(int af, unsigned int offset, short delta)
+int xt_compat_add_offset(u_int8_t af, unsigned int offset, short delta)
 {
 	struct compat_delta *tmp;
 
···
 }
 EXPORT_SYMBOL_GPL(xt_compat_add_offset);
 
-void xt_compat_flush_offsets(int af)
+void xt_compat_flush_offsets(u_int8_t af)
 {
 	struct compat_delta *tmp, *next;
 
···
 }
 EXPORT_SYMBOL_GPL(xt_compat_flush_offsets);
 
-short xt_compat_calc_jump(int af, unsigned int offset)
+short xt_compat_calc_jump(u_int8_t af, unsigned int offset)
 {
 	struct compat_delta *tmp;
 	short delta;
···
 EXPORT_SYMBOL(xt_free_table_info);
 
 /* Find table by name, grabs mutex & ref.  Returns ERR_PTR() on error. */
-struct xt_table *xt_find_table_lock(struct net *net, int af, const char *name)
+struct xt_table *xt_find_table_lock(struct net *net, u_int8_t af,
+				    const char *name)
 {
 	struct xt_table *t;
 
···
 EXPORT_SYMBOL_GPL(xt_table_unlock);
 
 #ifdef CONFIG_COMPAT
-void xt_compat_lock(int af)
+void xt_compat_lock(u_int8_t af)
 {
 	mutex_lock(&xt[af].compat_mutex);
 }
 EXPORT_SYMBOL_GPL(xt_compat_lock);
 
-void xt_compat_unlock(int af)
+void xt_compat_unlock(u_int8_t af)
 {
 	mutex_unlock(&xt[af].compat_mutex);
 }
···
 #ifdef CONFIG_PROC_FS
 struct xt_names_priv {
 	struct seq_net_private p;
-	int af;
+	u_int8_t af;
 };
 static void *xt_table_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	struct xt_names_priv *priv = seq->private;
 	struct net *net = seq_file_net(seq);
-	int af = priv->af;
+	u_int8_t af = priv->af;
 
 	mutex_lock(&xt[af].mutex);
 	return seq_list_start(&net->xt.tables[af], *pos);
···
 {
 	struct xt_names_priv *priv = seq->private;
 	struct net *net = seq_file_net(seq);
-	int af = priv->af;
+	u_int8_t af = priv->af;
 
 	return seq_list_next(v, &net->xt.tables[af], pos);
 }
···
 static void xt_table_seq_stop(struct seq_file *seq, void *v)
 {
 	struct xt_names_priv *priv = seq->private;
-	int af = priv->af;
+	u_int8_t af = priv->af;
 
 	mutex_unlock(&xt[af].mutex);
 }
···
 
 #endif /* CONFIG_PROC_FS */
 
-int xt_proto_init(struct net *net, int af)
+int xt_proto_init(struct net *net, u_int8_t af)
 {
 #ifdef CONFIG_PROC_FS
 	char buf[XT_FUNCTION_MAXNAMELEN];
···
 }
 EXPORT_SYMBOL_GPL(xt_proto_init);
 
-void xt_proto_fini(struct net *net, int af)
+void xt_proto_fini(struct net *net, u_int8_t af)
 {
 #ifdef CONFIG_PROC_FS
 	char buf[XT_FUNCTION_MAXNAMELEN];

net/netfilter/xt_connlimit.c

···
 static inline unsigned int
 same_source_net(const union nf_inet_addr *addr,
 		const union nf_inet_addr *mask,
-		const union nf_inet_addr *u3, unsigned int family)
+		const union nf_inet_addr *u3, u_int8_t family)
 {
 	if (family == AF_INET) {
 		return (addr->ip & mask->ip) == (u3->ip & mask->ip);

net/netfilter/xt_conntrack.c

···
 static inline bool
 conntrack_mt_origsrc(const struct nf_conn *ct,
                      const struct xt_conntrack_mtinfo1 *info,
-                     unsigned int family)
+		     u_int8_t family)
 {
 	return conntrack_addrcmp(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3,
 	       &info->origsrc_addr, &info->origsrc_mask, family);
···
 static inline bool
 conntrack_mt_origdst(const struct nf_conn *ct,
                      const struct xt_conntrack_mtinfo1 *info,
-                     unsigned int family)
+		     u_int8_t family)
 {
 	return conntrack_addrcmp(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3,
 	       &info->origdst_addr, &info->origdst_mask, family);
···
 static inline bool
 conntrack_mt_replsrc(const struct nf_conn *ct,
                      const struct xt_conntrack_mtinfo1 *info,
-                     unsigned int family)
+		     u_int8_t family)
 {
 	return conntrack_addrcmp(&ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3,
 	       &info->replsrc_addr, &info->replsrc_mask, family);
···
 static inline bool
 conntrack_mt_repldst(const struct nf_conn *ct,
                      const struct xt_conntrack_mtinfo1 *info,
-                     unsigned int family)
+		     u_int8_t family)
 {
 	return conntrack_addrcmp(&ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3,
 	       &info->repldst_addr, &info->repldst_mask, family);

net/netfilter/xt_hashlimit.c

···
 struct xt_hashlimit_htable {
 	struct hlist_node node;		/* global list of all htables */
 	atomic_t use;
-	int family;
+	u_int8_t family;
 
 	struct hashlimit_cfg1 cfg;	/* config */
 
···
 }
 static void htable_gc(unsigned long htlong);
 
-static int htable_create_v0(struct xt_hashlimit_info *minfo, int family)
+static int htable_create_v0(struct xt_hashlimit_info *minfo, u_int8_t family)
 {
 	struct xt_hashlimit_htable *hinfo;
 	unsigned int size;
···
 	return 0;
 }
 
-static int htable_create(struct xt_hashlimit_mtinfo1 *minfo,
-                         unsigned int family)
+static int htable_create(struct xt_hashlimit_mtinfo1 *minfo, u_int8_t family)
 {
 	struct xt_hashlimit_htable *hinfo;
 	unsigned int size;
···
 }
 
 static struct xt_hashlimit_htable *htable_find_get(const char *name,
-						   int family)
+						   u_int8_t family)
 {
 	struct xt_hashlimit_htable *hinfo;
 	struct hlist_node *pos;
···
 	spin_unlock_bh(&htable->lock);
 }
 
-static int dl_seq_real_show(struct dsthash_ent *ent, int family,
+static int dl_seq_real_show(struct dsthash_ent *ent, u_int8_t family,
 				   struct seq_file *s)
 {
 	/* recalculate to show accurate numbers */