Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (28 commits)
  drivers/isdn/hardware/mISDN: Use GFP_ATOMIC when a lock is held
  ksz884x: Add missing validate_addr hook
  ksz884x: convert to netdev_tx_t
  virtio-net: pass gfp to add_buf
  be2net: convert hdr.timeout in be_cmd_loopback_test() to le32
  can: mpc5xxx_can.c: Fix build failure
  net/ipv4/tcp_input.c: fix compilation breakage when FASTRETRANS_DEBUG > 1
  net: sock_queue_err_skb() dont mess with sk_forward_alloc
  netfilter: xtables: stackptr should be percpu
  netfilter: don't xt_jumpstack_alloc twice in xt_register_table
  greth: Fix build after OF device conversions.
  net: fix sk_forward_alloc corruptions
  Phonet: listening socket lock protects the connected socket list
  caif: unlock on error path in cfserl_receive()
  be2net: remove superfluous externs
  be2net: add unlock on error path
  net/rds: Add missing mutex_unlock
  drivers/isdn/hardware/mISDN: Add missing spin_unlock
  fs_enet: Adjust BDs after tx error
  skb: make skb_recycle_check() return a bool value
  ...

1 files changed, 36 insertions, 6 deletions

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index f8abf68e3988..9f07e749d7b1 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -482,22 +482,22 @@ EXPORT_SYMBOL(consume_skb);
  *	reference count dropping and cleans up the skbuff as if it
  *	just came from __alloc_skb().
  */
-int skb_recycle_check(struct sk_buff *skb, int skb_size)
+bool skb_recycle_check(struct sk_buff *skb, int skb_size)
 {
 	struct skb_shared_info *shinfo;
 
 	if (irqs_disabled())
-		return 0;
+		return false;
 
 	if (skb_is_nonlinear(skb) || skb->fclone != SKB_FCLONE_UNAVAILABLE)
-		return 0;
+		return false;
 
 	skb_size = SKB_DATA_ALIGN(skb_size + NET_SKB_PAD);
 	if (skb_end_pointer(skb) - skb->head < skb_size)
-		return 0;
+		return false;
 
 	if (skb_shared(skb) || skb_cloned(skb))
-		return 0;
+		return false;
 
 	skb_release_head_state(skb);
 
@@ -509,7 +509,7 @@ int skb_recycle_check(struct sk_buff *skb, int skb_size)
 	skb->data = skb->head + NET_SKB_PAD;
 	skb_reset_tail_pointer(skb);
 
-	return 1;
+	return true;
 }
 EXPORT_SYMBOL(skb_recycle_check);
 
@@ -2965,6 +2965,34 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
 }
 EXPORT_SYMBOL_GPL(skb_cow_data);
 
+static void sock_rmem_free(struct sk_buff *skb)
+{
+	struct sock *sk = skb->sk;
+
+	atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
+}
+
+/*
+ * Note: We dont mem charge error packets (no sk_forward_alloc changes)
+ */
+int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb)
+{
+	if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >=
+	    (unsigned)sk->sk_rcvbuf)
+		return -ENOMEM;
+
+	skb_orphan(skb);
+	skb->sk = sk;
+	skb->destructor = sock_rmem_free;
+	atomic_add(skb->truesize, &sk->sk_rmem_alloc);
+
+	skb_queue_tail(&sk->sk_error_queue, skb);
+	if (!sock_flag(sk, SOCK_DEAD))
+		sk->sk_data_ready(sk, skb->len);
+	return 0;
+}
+EXPORT_SYMBOL(sock_queue_err_skb);
+
 void skb_tstamp_tx(struct sk_buff *orig_skb,
 		struct skb_shared_hwtstamps *hwtstamps)
 {
@@ -2996,7 +3024,9 @@ void skb_tstamp_tx(struct sk_buff *orig_skb,
 	memset(serr, 0, sizeof(*serr));
 	serr->ee.ee_errno = ENOMSG;
 	serr->ee.ee_origin = SO_EE_ORIGIN_TIMESTAMPING;
+
 	err = sock_queue_err_skb(sk, skb);
+
 	if (err)
 		kfree_skb(skb);
 }