X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fnet%2Fsock.h;h=f5b6437141315cd745cbe8ddabdc1b64390936cd;hb=66cdb3ca27323a92712d289fc5edc7841d74a139;hp=5504fb9fa88a43e9cbce0cf7e4a9db54b188ec3b;hpb=a70a93229943c177f0062490b4f8e44be4cef685;p=linux-2.6

diff --git a/include/net/sock.h b/include/net/sock.h
index 5504fb9fa8..f5b6437141 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -145,7 +145,8 @@ struct sock_common {
   *	@sk_forward_alloc: space allocated forward
   *	@sk_allocation: allocation mode
   *	@sk_sndbuf: size of send buffer in bytes
-  *	@sk_flags: %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE, %SO_OOBINLINE settings
+  *	@sk_flags: %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE,
+  *		   %SO_OOBINLINE settings
   *	@sk_no_check: %SO_NO_CHECK setting, wether or not checkup packets
   *	@sk_route_caps: route capabilities (e.g. %NETIF_F_TSO)
   *	@sk_gso_type: GSO type (e.g. %SKB_GSO_TCPV4)
@@ -153,9 +154,12 @@ struct sock_common {
   *	@sk_backlog: always used with the per-socket spinlock held
   *	@sk_callback_lock: used with the callbacks in the end of this struct
   *	@sk_error_queue: rarely used
-  *	@sk_prot_creator: sk_prot of original sock creator (see ipv6_setsockopt, IPV6_ADDRFORM for instance)
+  *	@sk_prot_creator: sk_prot of original sock creator (see ipv6_setsockopt,
+  *			  IPV6_ADDRFORM for instance)
   *	@sk_err: last error
-  *	@sk_err_soft: errors that don't cause failure but are the cause of a persistent failure not just 'timed out'
+  *	@sk_err_soft: errors that don't cause failure but are the cause of a
+  *		      persistent failure not just 'timed out'
+  *	@sk_drops: raw drops counter
   *	@sk_ack_backlog: current listen backlog
   *	@sk_max_ack_backlog: listen backlog set in listen()
   *	@sk_priority: %SO_PRIORITY setting
@@ -239,6 +243,7 @@ struct sock {
 	rwlock_t		sk_callback_lock;
 	int			sk_err,
 				sk_err_soft;
+	atomic_t		sk_drops;
 	unsigned short		sk_ack_backlog;
 	unsigned short		sk_max_ack_backlog;
 	__u32			sk_priority;
@@ -944,7 +949,7 @@ static inline int sk_filter(struct sock *sk, struct sk_buff *skb)
 		return err;
 	
 	rcu_read_lock_bh();
-	filter = sk->sk_filter;
+	filter = rcu_dereference(sk->sk_filter);
 	if (filter) {
 		unsigned int pkt_len = sk_run_filter(skb, filter->insns,
 				filter->len);
@@ -1235,14 +1240,19 @@ static inline struct sk_buff *sk_stream_alloc_pskb(struct sock *sk,
 						   gfp_t gfp)
 {
 	struct sk_buff *skb;
-	int hdr_len;
 
-	hdr_len = SKB_DATA_ALIGN(sk->sk_prot->max_header);
-	skb = alloc_skb_fclone(size + hdr_len, gfp);
+	/* The TCP header must be at least 32-bit aligned.  */
+	size = ALIGN(size, 4);
+
+	skb = alloc_skb_fclone(size + sk->sk_prot->max_header, gfp);
 	if (skb) {
 		skb->truesize += mem;
 		if (sk_stream_wmem_schedule(sk, skb->truesize)) {
-			skb_reserve(skb, hdr_len);
+			/*
+			 * Make sure that we have exactly size bytes
+			 * available to the caller, no more, no less.
+			 */
+			skb_reserve(skb, skb_tailroom(skb) - size);
 			return skb;
 		}
 		__kfree_skb(skb);