socket: sk_filter deinline

The sk_filter function is too big to be inlined. This saves 2296 bytes
of text on allyesconfig.

Signed-off-by: Stephen Hemminger <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/linux/filter.h

···
 struct sk_buff;
 struct sock;
 
+extern int sk_filter(struct sock *sk, struct sk_buff *skb);
 extern unsigned int sk_run_filter(struct sk_buff *skb,
 				  struct sock_filter *filter, int flen);
 extern int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk);

include/net/sock.h

···
 extern void sock_init_data(struct socket *sock, struct sock *sk);
 
 /**
- *	sk_filter - run a packet through a socket filter
- *	@sk: sock associated with &sk_buff
- *	@skb: buffer to filter
- *	@needlock: set to 1 if the sock is not locked by caller.
- *
- * Run the filter code and then cut skb->data to correct size returned by
- * sk_run_filter. If pkt_len is 0 we toss packet. If skb->len is smaller
- * than pkt_len we keep whole skb->data. This is the socket level
- * wrapper to sk_run_filter. It returns 0 if the packet should
- * be accepted or -EPERM if the packet should be tossed.
- *
- */
-
-static inline int sk_filter(struct sock *sk, struct sk_buff *skb)
-{
-	int err;
-	struct sk_filter *filter;
-	
-	err = security_sock_rcv_skb(sk, skb);
-	if (err)
-		return err;
-	
-	rcu_read_lock_bh();
-	filter = rcu_dereference(sk->sk_filter);
-	if (filter) {
-		unsigned int pkt_len = sk_run_filter(skb, filter->insns,
-				filter->len);
-		err = pkt_len ? pskb_trim(skb, pkt_len) : -EPERM;
-	}
- 	rcu_read_unlock_bh();
-
-	return err;
-}
-
-/**
  *	sk_filter_release: Release a socket filter
  *	@sk: socket
  *	@fp: filter to remove

net/core/filter.c

···
 }
 
 /**
+ *	sk_filter - run a packet through a socket filter
+ *	@sk: sock associated with &sk_buff
+ *	@skb: buffer to filter
+ *	@needlock: set to 1 if the sock is not locked by caller.
+ *
+ * Run the filter code and then cut skb->data to correct size returned by
+ * sk_run_filter. If pkt_len is 0 we toss packet. If skb->len is smaller
+ * than pkt_len we keep whole skb->data. This is the socket level
+ * wrapper to sk_run_filter. It returns 0 if the packet should
+ * be accepted or -EPERM if the packet should be tossed.
+ *
+ */
+int sk_filter(struct sock *sk, struct sk_buff *skb)
+{
+	int err;
+	struct sk_filter *filter;
+
+	err = security_sock_rcv_skb(sk, skb);
+	if (err)
+		return err;
+
+	rcu_read_lock_bh();
+	filter = rcu_dereference(sk->sk_filter);
+	if (filter) {
+		unsigned int pkt_len = sk_run_filter(skb, filter->insns,
+				filter->len);
+		err = pkt_len ? pskb_trim(skb, pkt_len) : -EPERM;
+	}
+	rcu_read_unlock_bh();
+
+	return err;
+}
+EXPORT_SYMBOL(sk_filter);
+
+/**
  *	sk_run_filter - run a filter on a socket
  *	@skb: buffer to run the filter on
  *	@filter: filter to apply