[NET] CORE: Introducing new memory accounting interface.

This patch introduces new memory accounting functions for each network
protocol. Most of them are renamed from memory accounting functions
for stream protocols. At the same time, some stream memory accounting
functions are removed since other functions do same thing.

Renaming:
	sk_stream_free_skb()		->	sk_wmem_free_skb()
	__sk_stream_mem_reclaim()	->	__sk_mem_reclaim()
	sk_stream_mem_reclaim()		->	sk_mem_reclaim()
	sk_stream_mem_schedule 		->    	__sk_mem_schedule()
	sk_stream_pages()      		->	sk_mem_pages()
	sk_stream_rmem_schedule()	->	sk_rmem_schedule()
	sk_stream_wmem_schedule()	->	sk_wmem_schedule()
	sk_charge_skb()			->	sk_mem_charge()

Removeing
	sk_stream_rfree():	consolidates into sock_rfree()
	sk_stream_set_owner_r(): consolidates into skb_set_owner_r()
	sk_stream_mem_schedule()

The following functions are added.
    	sk_has_account(): check if the protocol supports accounting
	sk_mem_uncharge(): do the opposite of sk_mem_charge()

In addition, to achieve consolidation, updating sk_wmem_queued is
removed from sk_mem_charge().

Next, to consolidate memory accounting functions, this patch adds
memory accounting calls to network core functions. Moreover, present
memory accounting call is renamed to new accounting call.

Finally we replace present memory accounting calls with new interface
in TCP and SCTP.

Signed-off-by: Takahiro Yasui <tyasui@redhat.com>
Signed-off-by: Hideo Aoki <haoki@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

12 files changed, 162 insertions, 130 deletions

diff --git a/net/core/datagram.c b/net/core/datagram.c
index 2d73313..8a28fc9 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -209,6 +209,7 @@ struct sk_buff *skb_recv_datagram(struct sock *sk, unsigned flags,
 void skb_free_datagram(struct sock *sk, struct sk_buff *skb)
 {
 	kfree_skb(skb);
+	sk_mem_reclaim(sk);
 }
 
 /**
@@ -248,6 +249,7 @@ int skb_kill_datagram(struct sock *sk, struct sk_buff *skb, unsigned int flags)
 	}
 
 	kfree_skb(skb);
+	sk_mem_reclaim(sk);
 	return err;
 }
 
diff --git a/net/core/sock.c b/net/core/sock.c
index 1182140..8c184c4 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -282,6 +282,11 @@ int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
 	if (err)
 		goto out;
 
+	if (!sk_rmem_schedule(sk, skb->truesize)) {
+		err = -ENOBUFS;
+		goto out;
+	}
+
 	skb->dev = NULL;
 	skb_set_owner_r(skb, sk);
 
@@ -1107,7 +1112,9 @@ void sock_rfree(struct sk_buff *skb)
 {
 	struct sock *sk = skb->sk;
 
+	skb_truesize_check(skb);
 	atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
+	sk_mem_uncharge(skb->sk, skb->truesize);
 }
 
 
@@ -1384,6 +1391,103 @@ int sk_wait_data(struct sock *sk, long *timeo)
 
 EXPORT_SYMBOL(sk_wait_data);
 
+/**
+ *	__sk_mem_schedule - increase sk_forward_alloc and memory_allocated
+ *	@sk: socket
+ *	@size: memory size to allocate
+ *	@kind: allocation type
+ *
+ *	If kind is SK_MEM_SEND, it means wmem allocation. Otherwise it means
+ *	rmem allocation. This function assumes that protocols which have
+ *	memory_pressure use sk_wmem_queued as write buffer accounting.
+ */
+int __sk_mem_schedule(struct sock *sk, int size, int kind)
+{
+	struct proto *prot = sk->sk_prot;
+	int amt = sk_mem_pages(size);
+	int allocated;
+
+	sk->sk_forward_alloc += amt * SK_MEM_QUANTUM;
+	allocated = atomic_add_return(amt, prot->memory_allocated);
+
+	/* Under limit. */
+	if (allocated <= prot->sysctl_mem[0]) {
+		if (prot->memory_pressure && *prot->memory_pressure)
+			*prot->memory_pressure = 0;
+		return 1;
+	}
+
+	/* Under pressure. */
+	if (allocated > prot->sysctl_mem[1])
+		if (prot->enter_memory_pressure)
+			prot->enter_memory_pressure();
+
+	/* Over hard limit. */
+	if (allocated > prot->sysctl_mem[2])
+		goto suppress_allocation;
+
+	/* guarantee minimum buffer size under pressure */
+	if (kind == SK_MEM_RECV) {
+		if (atomic_read(&sk->sk_rmem_alloc) < prot->sysctl_rmem[0])
+			return 1;
+	} else { /* SK_MEM_SEND */
+		if (sk->sk_type == SOCK_STREAM) {
+			if (sk->sk_wmem_queued < prot->sysctl_wmem[0])
+				return 1;
+		} else if (atomic_read(&sk->sk_wmem_alloc) <
+			   prot->sysctl_wmem[0])
+				return 1;
+	}
+
+	if (prot->memory_pressure) {
+		if (!*prot->memory_pressure ||
+		    prot->sysctl_mem[2] > atomic_read(prot->sockets_allocated) *
+		    sk_mem_pages(sk->sk_wmem_queued +
+				 atomic_read(&sk->sk_rmem_alloc) +
+				 sk->sk_forward_alloc))
+			return 1;
+	}
+
+suppress_allocation:
+
+	if (kind == SK_MEM_SEND && sk->sk_type == SOCK_STREAM) {
+		sk_stream_moderate_sndbuf(sk);
+
+		/* Fail only if socket is _under_ its sndbuf.
+		 * In this case we cannot block, so that we have to fail.
+		 */
+		if (sk->sk_wmem_queued + size >= sk->sk_sndbuf)
+			return 1;
+	}
+
+	/* Alas. Undo changes. */
+	sk->sk_forward_alloc -= amt * SK_MEM_QUANTUM;
+	atomic_sub(amt, prot->memory_allocated);
+	return 0;
+}
+
+EXPORT_SYMBOL(__sk_mem_schedule);
+
+/**
+ *	__sk_reclaim - reclaim memory_allocated
+ *	@sk: socket
+ */
+void __sk_mem_reclaim(struct sock *sk)
+{
+	struct proto *prot = sk->sk_prot;
+
+	atomic_sub(sk->sk_forward_alloc / SK_MEM_QUANTUM,
+		   prot->memory_allocated);
+	sk->sk_forward_alloc &= SK_MEM_QUANTUM - 1;
+
+	if (prot->memory_pressure && *prot->memory_pressure &&
+	    (atomic_read(prot->memory_allocated) < prot->sysctl_mem[0]))
+		*prot->memory_pressure = 0;
+}
+
+EXPORT_SYMBOL(__sk_mem_reclaim);
+
+
 /*
  * Set of default routines for initialising struct proto_ops when
  * the protocol does not support a particular function. In certain
diff --git a/net/core/stream.c b/net/core/stream.c
index bf188ff..4a0ad15 100644
--- a/net/core/stream.c
+++ b/net/core/stream.c
@@ -172,17 +172,6 @@ do_interrupted:
 
 EXPORT_SYMBOL(sk_stream_wait_memory);
 
-void sk_stream_rfree(struct sk_buff *skb)
-{
-	struct sock *sk = skb->sk;
-
-	skb_truesize_check(skb);
-	atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
-	sk->sk_forward_alloc += skb->truesize;
-}
-
-EXPORT_SYMBOL(sk_stream_rfree);
-
 int sk_stream_error(struct sock *sk, int flags, int err)
 {
 	if (err == -EPIPE)
@@ -194,77 +183,6 @@ int sk_stream_error(struct sock *sk, int flags, int err)
 
 EXPORT_SYMBOL(sk_stream_error);
 
-void __sk_stream_mem_reclaim(struct sock *sk)
-{
-	atomic_sub(sk->sk_forward_alloc >> SK_STREAM_MEM_QUANTUM_SHIFT,
-		   sk->sk_prot->memory_allocated);
-	sk->sk_forward_alloc &= SK_STREAM_MEM_QUANTUM - 1;
-	if (*sk->sk_prot->memory_pressure &&
-	    (atomic_read(sk->sk_prot->memory_allocated) <
-	     sk->sk_prot->sysctl_mem[0]))
-		*sk->sk_prot->memory_pressure = 0;
-}
-
-EXPORT_SYMBOL(__sk_stream_mem_reclaim);
-
-int sk_stream_mem_schedule(struct sock *sk, int size, int kind)
-{
-	int amt = sk_stream_pages(size);
-	struct proto *prot = sk->sk_prot;
-
-	sk->sk_forward_alloc += amt * SK_STREAM_MEM_QUANTUM;
-	atomic_add(amt, prot->memory_allocated);
-
-	/* Under limit. */
-	if (atomic_read(prot->memory_allocated) < prot->sysctl_mem[0]) {
-		if (*prot->memory_pressure)
-			*prot->memory_pressure = 0;
-		return 1;
-	}
-
-	/* Over hard limit. */
-	if (atomic_read(prot->memory_allocated) > prot->sysctl_mem[2]) {
-		prot->enter_memory_pressure();
-		goto suppress_allocation;
-	}
-
-	/* Under pressure. */
-	if (atomic_read(prot->memory_allocated) > prot->sysctl_mem[1])
-		prot->enter_memory_pressure();
-
-	if (kind) {
-		if (atomic_read(&sk->sk_rmem_alloc) < prot->sysctl_rmem[0])
-			return 1;
-	} else if (sk->sk_wmem_queued < prot->sysctl_wmem[0])
-		return 1;
-
-	if (!*prot->memory_pressure ||
-	    prot->sysctl_mem[2] > atomic_read(prot->sockets_allocated) *
-				sk_stream_pages(sk->sk_wmem_queued +
-						atomic_read(&sk->sk_rmem_alloc) +
-						sk->sk_forward_alloc))
-		return 1;
-
-suppress_allocation:
-
-	if (!kind) {
-		sk_stream_moderate_sndbuf(sk);
-
-		/* Fail only if socket is _under_ its sndbuf.
-		 * In this case we cannot block, so that we have to fail.
-		 */
-		if (sk->sk_wmem_queued + size >= sk->sk_sndbuf)
-			return 1;
-	}
-
-	/* Alas. Undo changes. */
-	sk->sk_forward_alloc -= amt * SK_STREAM_MEM_QUANTUM;
-	atomic_sub(amt, prot->memory_allocated);
-	return 0;
-}
-
-EXPORT_SYMBOL(sk_stream_mem_schedule);
-
 void sk_stream_kill_queues(struct sock *sk)
 {
 	/* First the read buffer. */
@@ -277,7 +195,7 @@ void sk_stream_kill_queues(struct sock *sk)
 	BUG_TRAP(skb_queue_empty(&sk->sk_write_queue));
 
 	/* Account for returned memory. */
-	sk_stream_mem_reclaim(sk);
+	sk_mem_reclaim(sk);
 
 	BUG_TRAP(!sk->sk_wmem_queued);
 	BUG_TRAP(!sk->sk_forward_alloc);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index fdaf965..2cbfa6d 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -308,7 +308,7 @@ struct tcp_splice_state {
 /*
  * Pressure flag: try to collapse.
  * Technical note: it is used by multiple contexts non atomically.
- * All the sk_stream_mem_schedule() is of this nature: accounting
+ * All the __sk_mem_schedule() is of this nature: accounting
  * is strict, actions are advisory and have some latency.
  */
 int tcp_memory_pressure __read_mostly;
@@ -485,7 +485,8 @@ static inline void skb_entail(struct sock *sk, struct sk_buff *skb)
 	tcb->sacked  = 0;
 	skb_header_release(skb);
 	tcp_add_write_queue_tail(sk, skb);
-	sk_charge_skb(sk, skb);
+	sk->sk_wmem_queued += skb->truesize;
+	sk_mem_charge(sk, skb->truesize);
 	if (tp->nonagle & TCP_NAGLE_PUSH)
 		tp->nonagle &= ~TCP_NAGLE_PUSH;
 }
@@ -638,7 +639,7 @@ struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp)
 
 	skb = alloc_skb_fclone(size + sk->sk_prot->max_header, gfp);
 	if (skb) {
-		if (sk_stream_wmem_schedule(sk, skb->truesize)) {
+		if (sk_wmem_schedule(sk, skb->truesize)) {
 			/*
 			 * Make sure that we have exactly size bytes
 			 * available to the caller, no more, no less.
@@ -707,7 +708,7 @@ new_segment:
 			tcp_mark_push(tp, skb);
 			goto new_segment;
 		}
-		if (!sk_stream_wmem_schedule(sk, copy))
+		if (!sk_wmem_schedule(sk, copy))
 			goto wait_for_memory;
 
 		if (can_coalesce) {
@@ -721,7 +722,7 @@ new_segment:
 		skb->data_len += copy;
 		skb->truesize += copy;
 		sk->sk_wmem_queued += copy;
-		sk->sk_forward_alloc -= copy;
+		sk_mem_charge(sk, copy);
 		skb->ip_summed = CHECKSUM_PARTIAL;
 		tp->write_seq += copy;
 		TCP_SKB_CB(skb)->end_seq += copy;
@@ -928,7 +929,7 @@ new_segment:
 				if (copy > PAGE_SIZE - off)
 					copy = PAGE_SIZE - off;
 
-				if (!sk_stream_wmem_schedule(sk, copy))
+				if (!sk_wmem_schedule(sk, copy))
 					goto wait_for_memory;
 
 				if (!page) {
@@ -1019,7 +1020,7 @@ do_fault:
 		 * reset, where we can be unlinking the send_head.
 		 */
 		tcp_check_send_head(sk, skb);
-		sk_stream_free_skb(sk, skb);
+		sk_wmem_free_skb(sk, skb);
 	}
 
 do_error:
@@ -1738,7 +1739,7 @@ void tcp_close(struct sock *sk, long timeout)
 		__kfree_skb(skb);
 	}
 
-	sk_stream_mem_reclaim(sk);
+	sk_mem_reclaim(sk);
 
 	/* As outlined in RFC 2525, section 2.17, we send a RST here because
 	 * data was lost. To witness the awful effects of the old behavior of
@@ -1841,7 +1842,7 @@ adjudge_to_death:
 		}
 	}
 	if (sk->sk_state != TCP_CLOSE) {
-		sk_stream_mem_reclaim(sk);
+		sk_mem_reclaim(sk);
 		if (tcp_too_many_orphans(sk,
 				atomic_read(sk->sk_prot->orphan_count))) {
 			if (net_ratelimit())
@@ -2658,11 +2659,11 @@ void __init tcp_init(void)
 	limit = ((unsigned long)sysctl_tcp_mem[1]) << (PAGE_SHIFT - 7);
 	max_share = min(4UL*1024*1024, limit);
 
-	sysctl_tcp_wmem[0] = SK_STREAM_MEM_QUANTUM;
+	sysctl_tcp_wmem[0] = SK_MEM_QUANTUM;
 	sysctl_tcp_wmem[1] = 16*1024;
 	sysctl_tcp_wmem[2] = max(64*1024, max_share);
 
-	sysctl_tcp_rmem[0] = SK_STREAM_MEM_QUANTUM;
+	sysctl_tcp_rmem[0] = SK_MEM_QUANTUM;
 	sysctl_tcp_rmem[1] = 87380;
 	sysctl_tcp_rmem[2] = max(87380, max_share);
 
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index efea987..722c9cb 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -591,7 +591,7 @@ static void tcp_event_data_recv(struct sock *sk, struct sk_buff *skb)
 			 * restart window, so that we send ACKs quickly.
 			 */
 			tcp_incr_quickack(sk);
-			sk_stream_mem_reclaim(sk);
+			sk_mem_reclaim(sk);
 		}
 	}
 	icsk->icsk_ack.lrcvtime = now;
@@ -2851,7 +2851,7 @@ static int tcp_clean_rtx_queue(struct sock *sk, int prior_fackets)
 			break;
 
 		tcp_unlink_write_queue(skb, sk);
-		sk_stream_free_skb(sk, skb);
+		sk_wmem_free_skb(sk, skb);
 		tcp_clear_all_retrans_hints(tp);
 	}
 
@@ -3567,7 +3567,7 @@ static void tcp_fin(struct sk_buff *skb, struct sock *sk, struct tcphdr *th)
 	__skb_queue_purge(&tp->out_of_order_queue);
 	if (tcp_is_sack(tp))
 		tcp_sack_reset(&tp->rx_opt);
-	sk_stream_mem_reclaim(sk);
+	sk_mem_reclaim(sk);
 
 	if (!sock_flag(sk, SOCK_DEAD)) {
 		sk->sk_state_change(sk);
@@ -3850,12 +3850,12 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
 queue_and_out:
 			if (eaten < 0 &&
 			    (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf ||
-			     !sk_stream_rmem_schedule(sk, skb))) {
+			     !sk_rmem_schedule(sk, skb->truesize))) {
 				if (tcp_prune_queue(sk) < 0 ||
-				    !sk_stream_rmem_schedule(sk, skb))
+				    !sk_rmem_schedule(sk, skb->truesize))
 					goto drop;
 			}
-			sk_stream_set_owner_r(skb, sk);
+			skb_set_owner_r(skb, sk);
 			__skb_queue_tail(&sk->sk_receive_queue, skb);
 		}
 		tp->rcv_nxt = TCP_SKB_CB(skb)->end_seq;
@@ -3924,9 +3924,9 @@ drop:
 	TCP_ECN_check_ce(tp, skb);
 
 	if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf ||
-	    !sk_stream_rmem_schedule(sk, skb)) {
+	    !sk_rmem_schedule(sk, skb->truesize)) {
 		if (tcp_prune_queue(sk) < 0 ||
-		    !sk_stream_rmem_schedule(sk, skb))
+		    !sk_rmem_schedule(sk, skb->truesize))
 			goto drop;
 	}
 
@@ -3937,7 +3937,7 @@ drop:
 	SOCK_DEBUG(sk, "out of order segment: rcv_next %X seq %X - %X\n",
 		   tp->rcv_nxt, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq);
 
-	sk_stream_set_owner_r(skb, sk);
+	skb_set_owner_r(skb, sk);
 
 	if (!skb_peek(&tp->out_of_order_queue)) {
 		/* Initial out of order segment, build 1 SACK. */
@@ -4079,7 +4079,7 @@ tcp_collapse(struct sock *sk, struct sk_buff_head *list,
 		memcpy(nskb->cb, skb->cb, sizeof(skb->cb));
 		TCP_SKB_CB(nskb)->seq = TCP_SKB_CB(nskb)->end_seq = start;
 		__skb_insert(nskb, skb->prev, skb, list);
-		sk_stream_set_owner_r(nskb, sk);
+		skb_set_owner_r(nskb, sk);
 
 		/* Copy data, releasing collapsed skbs. */
 		while (copy > 0) {
@@ -4177,7 +4177,7 @@ static int tcp_prune_queue(struct sock *sk)
 		     sk->sk_receive_queue.next,
 		     (struct sk_buff*)&sk->sk_receive_queue,
 		     tp->copied_seq, tp->rcv_nxt);
-	sk_stream_mem_reclaim(sk);
+	sk_mem_reclaim(sk);
 
 	if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
 		return 0;
@@ -4197,7 +4197,7 @@ static int tcp_prune_queue(struct sock *sk)
 		 */
 		if (tcp_is_sack(tp))
 			tcp_sack_reset(&tp->rx_opt);
-		sk_stream_mem_reclaim(sk);
+		sk_mem_reclaim(sk);
 	}
 
 	if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
@@ -4699,7 +4699,7 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
 				/* Bulk data transfer: receiver */
 				__skb_pull(skb,tcp_header_len);
 				__skb_queue_tail(&sk->sk_receive_queue, skb);
-				sk_stream_set_owner_r(skb, sk);
+				skb_set_owner_r(skb, sk);
 				tp->rcv_nxt = TCP_SKB_CB(skb)->end_seq;
 			}
 
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 9058e0a..7a4834a 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -637,7 +637,8 @@ static void tcp_queue_skb(struct sock *sk, struct sk_buff *skb)
 	tp->write_seq = TCP_SKB_CB(skb)->end_seq;
 	skb_header_release(skb);
 	tcp_add_write_queue_tail(sk, skb);
-	sk_charge_skb(sk, skb);
+	sk->sk_wmem_queued += skb->truesize;
+	sk_mem_charge(sk, skb->truesize);
 }
 
 static void tcp_set_skb_tso_segs(struct sock *sk, struct sk_buff *skb, unsigned int mss_now)
@@ -701,7 +702,8 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
 	if (buff == NULL)
 		return -ENOMEM; /* We'll just try again later. */
 
-	sk_charge_skb(sk, buff);
+	sk->sk_wmem_queued += buff->truesize;
+	sk_mem_charge(sk, buff->truesize);
 	nlen = skb->len - len - nsize;
 	buff->truesize += nlen;
 	skb->truesize -= nlen;
@@ -825,7 +827,7 @@ int tcp_trim_head(struct sock *sk, struct sk_buff *skb, u32 len)
 
 	skb->truesize	     -= len;
 	sk->sk_wmem_queued   -= len;
-	sk->sk_forward_alloc += len;
+	sk_mem_uncharge(sk, len);
 	sock_set_flag(sk, SOCK_QUEUE_SHRUNK);
 
 	/* Any change of skb->len requires recalculation of tso
@@ -1197,7 +1199,8 @@ static int tso_fragment(struct sock *sk, struct sk_buff *skb, unsigned int len,
 	if (unlikely(buff == NULL))
 		return -ENOMEM;
 
-	sk_charge_skb(sk, buff);
+	sk->sk_wmem_queued += buff->truesize;
+	sk_mem_charge(sk, buff->truesize);
 	buff->truesize += nlen;
 	skb->truesize -= nlen;
 
@@ -1350,7 +1353,8 @@ static int tcp_mtu_probe(struct sock *sk)
 	/* We're allowed to probe.  Build it now. */
 	if ((nskb = sk_stream_alloc_skb(sk, probe_size, GFP_ATOMIC)) == NULL)
 		return -1;
-	sk_charge_skb(sk, nskb);
+	sk->sk_wmem_queued += nskb->truesize;
+	sk_mem_charge(sk, nskb->truesize);
 
 	skb = tcp_send_head(sk);
 
@@ -1377,7 +1381,7 @@ static int tcp_mtu_probe(struct sock *sk)
 			 * Throw it away. */
 			TCP_SKB_CB(nskb)->flags |= TCP_SKB_CB(skb)->flags;
 			tcp_unlink_write_queue(skb, sk);
-			sk_stream_free_skb(sk, skb);
+			sk_wmem_free_skb(sk, skb);
 		} else {
 			TCP_SKB_CB(nskb)->flags |= TCP_SKB_CB(skb)->flags &
 						   ~(TCPCB_FLAG_FIN|TCPCB_FLAG_PSH);
@@ -1744,7 +1748,7 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m
 		/* changed transmit queue under us so clear hints */
 		tcp_clear_retrans_hints_partial(tp);
 
-		sk_stream_free_skb(sk, next_skb);
+		sk_wmem_free_skb(sk, next_skb);
 	}
 }
 
@@ -2139,8 +2143,9 @@ int tcp_send_synack(struct sock *sk)
 			tcp_unlink_write_queue(skb, sk);
 			skb_header_release(nskb);
 			__tcp_add_write_queue_head(sk, nskb);
-			sk_stream_free_skb(sk, skb);
-			sk_charge_skb(sk, nskb);
+			sk_wmem_free_skb(sk, skb);
+			sk->sk_wmem_queued += nskb->truesize;
+			sk_mem_charge(sk, nskb->truesize);
 			skb = nskb;
 		}
 
@@ -2343,7 +2348,8 @@ int tcp_connect(struct sock *sk)
 	tp->retrans_stamp = TCP_SKB_CB(buff)->when;
 	skb_header_release(buff);
 	__tcp_add_write_queue_tail(sk, buff);
-	sk_charge_skb(sk, buff);
+	sk->sk_wmem_queued += buff->truesize;
+	sk_mem_charge(sk, buff->truesize);
 	tp->packets_out += tcp_skb_pcount(buff);
 	tcp_transmit_skb(sk, buff, 1, GFP_KERNEL);
 
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index ea85bc0..17931be 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -186,7 +186,7 @@ static void tcp_delack_timer(unsigned long data)
 		goto out_unlock;
 	}
 
-	sk_stream_mem_reclaim(sk);
+	sk_mem_reclaim(sk);
 
 	if (sk->sk_state == TCP_CLOSE || !(icsk->icsk_ack.pending & ICSK_ACK_TIMER))
 		goto out;
@@ -226,7 +226,7 @@ static void tcp_delack_timer(unsigned long data)
 
 out:
 	if (tcp_memory_pressure)
-		sk_stream_mem_reclaim(sk);
+		sk_mem_reclaim(sk);
 out_unlock:
 	bh_unlock_sock(sk);
 	sock_put(sk);
@@ -420,7 +420,7 @@ static void tcp_write_timer(unsigned long data)
 	TCP_CHECK_TIMER(sk);
 
 out:
-	sk_stream_mem_reclaim(sk);
+	sk_mem_reclaim(sk);
 out_unlock:
 	bh_unlock_sock(sk);
 	sock_put(sk);
@@ -514,7 +514,7 @@ static void tcp_keepalive_timer (unsigned long data)
 	}
 
 	TCP_CHECK_TIMER(sk);
-	sk_stream_mem_reclaim(sk);
+	sk_mem_reclaim(sk);
 
 resched:
 	inet_csk_reset_keepalive_timer (sk, elapsed);
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index e466e00..b921964 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1109,7 +1109,7 @@ SCTP_STATIC __init int sctp_init(void)
 	sysctl_sctp_rmem[1] = (1500 *(sizeof(struct sk_buff) + 1));
 	sysctl_sctp_rmem[2] = max(sysctl_sctp_rmem[1], max_share);
 
-	sysctl_sctp_wmem[0] = SK_STREAM_MEM_QUANTUM;
+	sysctl_sctp_wmem[0] = SK_MEM_QUANTUM;
 	sysctl_sctp_wmem[1] = 16*1024;
 	sysctl_sctp_wmem[2] = max(64*1024, max_share);
 
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 511d8c9..b126751 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -5844,7 +5844,7 @@ static int sctp_eat_data(const struct sctp_association *asoc,
 	/*
 	 * Also try to renege to limit our memory usage in the event that
 	 * we are under memory pressure
-	 * If we can't renege, don't worry about it, the sk_stream_rmem_schedule
+	 * If we can't renege, don't worry about it, the sk_rmem_schedule
 	 * in sctp_ulpevent_make_rcvmsg will drop the frame if we grow our
 	 * memory usage too much
 	 */
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 7a8650f..710df67 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -174,7 +174,8 @@ static inline void sctp_set_owner_w(struct sctp_chunk *chunk)
 				sizeof(struct sctp_chunk);
 
 	atomic_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc);
-	sk_charge_skb(sk, chunk->skb);
+	sk->sk_wmem_queued += chunk->skb->truesize;
+	sk_mem_charge(sk, chunk->skb->truesize);
 }
 
 /* Verify that this is a valid address. */
@@ -6035,10 +6036,10 @@ static void sctp_wfree(struct sk_buff *skb)
 	atomic_sub(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc);
 
 	/*
-	 * This undoes what is done via sk_charge_skb
+	 * This undoes what is done via sctp_set_owner_w and sk_mem_charge
 	 */
 	sk->sk_wmem_queued   -= skb->truesize;
-	sk->sk_forward_alloc += skb->truesize;
+	sk_mem_uncharge(sk, skb->truesize);
 
 	sock_wfree(skb);
 	__sctp_write_space(asoc);
@@ -6059,9 +6060,9 @@ void sctp_sock_rfree(struct sk_buff *skb)
 	atomic_sub(event->rmem_len, &sk->sk_rmem_alloc);
 
 	/*
-	 * Mimic the behavior of sk_stream_rfree
+	 * Mimic the behavior of sock_rfree
 	 */
-	sk->sk_forward_alloc += event->rmem_len;
+	sk_mem_uncharge(sk, event->rmem_len);
 }
 
 
diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
index 3073143..047c27d 100644
--- a/net/sctp/ulpevent.c
+++ b/net/sctp/ulpevent.c
@@ -700,7 +700,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
 	if (rx_count >= asoc->base.sk->sk_rcvbuf) {
 
 		if ((asoc->base.sk->sk_userlocks & SOCK_RCVBUF_LOCK) ||
-		   (!sk_stream_rmem_schedule(asoc->base.sk, chunk->skb)))
+		    (!sk_rmem_schedule(asoc->base.sk, chunk->skb->truesize)))
 			goto fail;
 	}
 
diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c
index 1733fa2..c25caef 100644
--- a/net/sctp/ulpqueue.c
+++ b/net/sctp/ulpqueue.c
@@ -1046,7 +1046,7 @@ void sctp_ulpq_renege(struct sctp_ulpq *ulpq, struct sctp_chunk *chunk,
 		sctp_ulpq_partial_delivery(ulpq, chunk, gfp);
 	}
 
-	sk_stream_mem_reclaim(asoc->base.sk);
+	sk_mem_reclaim(asoc->base.sk);
 	return;
 }