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

Pull networking updates from David Miller:

 1) BBR TCP congestion control, from Neal Cardwell, Yuchung Cheng and
    co. at Google. https://lwn.net/Articles/701165/

 2) Do TCP Small Queues for retransmits, from Eric Dumazet.

 3) Support collect_md mode for all IPV4 and IPV6 tunnels, from Alexei
    Starovoitov.

 4) Allow cls_flower to classify packets in ip tunnels, from Amir Vadai.

 5) Support DSA tagging in older mv88e6xxx switches, from Andrew Lunn.

 6) Support GMAC protocol in iwlwifi mwm, from Ayala Beker.

 7) Support ndo_poll_controller in mlx5, from Calvin Owens.

 8) Move VRF processing to an output hook and allow l3mdev to be
    loopback, from David Ahern.

 9) Support SOCK_DESTROY for UDP sockets. Also from David Ahern.

10) Congestion control in RXRPC, from David Howells.

11) Support geneve RX offload in ixgbe, from Emil Tantilov.

12) When hitting pressure for new incoming TCP data SKBs, perform a
    partial rathern than a full purge of the OFO queue (which could be
    huge). From Eric Dumazet.

13) Convert XFRM state and policy lookups to RCU, from Florian Westphal.

14) Support RX network flow classification to igb, from Gangfeng Huang.

15) Hardware offloading of eBPF in nfp driver, from Jakub Kicinski.

16) New skbmod packet action, from Jamal Hadi Salim.

17) Remove some inefficiencies in snmp proc output, from Jia He.

18) Add FIB notifications to properly propagate route changes to
    hardware which is doing forwarding offloading. From Jiri Pirko.

19) New dsa driver for qca8xxx chips, from John Crispin.

20) Implement RFC7559 ipv6 router solicitation backoff, from Maciej
    Żenczykowski.

21) Add L3 mode to ipvlan, from Mahesh Bandewar.

22) Support 802.1ad in mlx4, from Moshe Shemesh.

23) Support hardware LRO in mediatek driver, from Nelson Chang.

24) Add TC offloading to mlx5, from Or Gerlitz.

25) Convert various drivers to ethtool ksettings interfaces, from
    Philippe Reynes.

26) TX max rate limiting for cxgb4, from Rahul Lakkireddy.

27) NAPI support for ath10k, from Rajkumar Manoharan.

28) Support XDP in mlx5, from Rana Shahout and Saeed Mahameed.

29) UDP replicast support in TIPC, from Richard Alpe.

30) Per-queue statistics for qed driver, from Sudarsana Reddy Kalluru.

31) Support BQL in thunderx driver, from Sunil Goutham.

32) TSO support in alx driver, from Tobias Regnery.

33) Add stream parser engine and use it in kcm.

34) Support async DHCP replies in ipconfig module, from Uwe
    Kleine-König.

35) DSA port fast aging for mv88e6xxx driver, from Vivien Didelot.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1715 commits)
  mlxsw: switchx2: Fix misuse of hard_header_len
  mlxsw: spectrum: Fix misuse of hard_header_len
  net/faraday: Stop NCSI device on shutdown
  net/ncsi: Introduce ncsi_stop_dev()
  net/ncsi: Rework the channel monitoring
  net/ncsi: Allow to extend NCSI request properties
  net/ncsi: Rework request index allocation
  net/ncsi: Don't probe on the reserved channel ID (0x1f)
  net/ncsi: Introduce NCSI_RESERVED_CHANNEL
  net/ncsi: Avoid unused-value build warning from ia64-linux-gcc
  net: Add netdev all_adj_list refcnt propagation to fix panic
  net: phy: Add Edge-rate driver for Microsemi PHYs.
  vmxnet3: Wake queue from reset work
  i40e: avoid NULL pointer dereference and recursive errors on early PCI error
  qed: Add RoCE ll2 & GSI support
  qed: Add support for memory registeration verbs
  qed: Add support for QP verbs
  qed: PD,PKEY and CQ verb support
  qed: Add support for RoCE hw init
  qede: Add qedr framework
  ...

1 files changed, 36 insertions, 63 deletions

diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index 107233da5cc9..582585393d35 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -68,7 +68,7 @@ static void sctp_mark_missing(struct sctp_outq *q,
 
 static void sctp_generate_fwdtsn(struct sctp_outq *q, __u32 sack_ctsn);
 
-static int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout, gfp_t gfp);
+static void sctp_outq_flush(struct sctp_outq *q, int rtx_timeout, gfp_t gfp);
 
 /* Add data to the front of the queue. */
 static inline void sctp_outq_head_data(struct sctp_outq *q,
@@ -285,10 +285,9 @@ void sctp_outq_free(struct sctp_outq *q)
 }
 
 /* Put a new chunk in an sctp_outq.  */
-int sctp_outq_tail(struct sctp_outq *q, struct sctp_chunk *chunk, gfp_t gfp)
+void sctp_outq_tail(struct sctp_outq *q, struct sctp_chunk *chunk, gfp_t gfp)
 {
 	struct net *net = sock_net(q->asoc->base.sk);
-	int error = 0;
 
 	pr_debug("%s: outq:%p, chunk:%p[%s]\n", __func__, q, chunk,
 		 chunk && chunk->chunk_hdr ?
@@ -299,54 +298,26 @@ int sctp_outq_tail(struct sctp_outq *q, struct sctp_chunk *chunk, gfp_t gfp)
 	 * immediately.
 	 */
 	if (sctp_chunk_is_data(chunk)) {
-		/* Is it OK to queue data chunks?  */
-		/* From 9. Termination of Association
-		 *
-		 * When either endpoint performs a shutdown, the
-		 * association on each peer will stop accepting new
-		 * data from its user and only deliver data in queue
-		 * at the time of sending or receiving the SHUTDOWN
-		 * chunk.
-		 */
-		switch (q->asoc->state) {
-		case SCTP_STATE_CLOSED:
-		case SCTP_STATE_SHUTDOWN_PENDING:
-		case SCTP_STATE_SHUTDOWN_SENT:
-		case SCTP_STATE_SHUTDOWN_RECEIVED:
-		case SCTP_STATE_SHUTDOWN_ACK_SENT:
-			/* Cannot send after transport endpoint shutdown */
-			error = -ESHUTDOWN;
-			break;
-
-		default:
-			pr_debug("%s: outqueueing: outq:%p, chunk:%p[%s])\n",
-				 __func__, q, chunk, chunk && chunk->chunk_hdr ?
-				 sctp_cname(SCTP_ST_CHUNK(chunk->chunk_hdr->type)) :
-				 "illegal chunk");
-
-			sctp_chunk_hold(chunk);
-			sctp_outq_tail_data(q, chunk);
-			if (chunk->asoc->peer.prsctp_capable &&
-			    SCTP_PR_PRIO_ENABLED(chunk->sinfo.sinfo_flags))
-				chunk->asoc->sent_cnt_removable++;
-			if (chunk->chunk_hdr->flags & SCTP_DATA_UNORDERED)
-				SCTP_INC_STATS(net, SCTP_MIB_OUTUNORDERCHUNKS);
-			else
-				SCTP_INC_STATS(net, SCTP_MIB_OUTORDERCHUNKS);
-			break;
-		}
+		pr_debug("%s: outqueueing: outq:%p, chunk:%p[%s])\n",
+			 __func__, q, chunk, chunk && chunk->chunk_hdr ?
+			 sctp_cname(SCTP_ST_CHUNK(chunk->chunk_hdr->type)) :
+			 "illegal chunk");
+
+		sctp_outq_tail_data(q, chunk);
+		if (chunk->asoc->peer.prsctp_capable &&
+		    SCTP_PR_PRIO_ENABLED(chunk->sinfo.sinfo_flags))
+			chunk->asoc->sent_cnt_removable++;
+		if (chunk->chunk_hdr->flags & SCTP_DATA_UNORDERED)
+			SCTP_INC_STATS(net, SCTP_MIB_OUTUNORDERCHUNKS);
+		else
+			SCTP_INC_STATS(net, SCTP_MIB_OUTORDERCHUNKS);
 	} else {
 		list_add_tail(&chunk->list, &q->control_chunk_list);
 		SCTP_INC_STATS(net, SCTP_MIB_OUTCTRLCHUNKS);
 	}
 
-	if (error < 0)
-		return error;
-
 	if (!q->cork)
-		error = sctp_outq_flush(q, 0, gfp);
-
-	return error;
+		sctp_outq_flush(q, 0, gfp);
 }
 
 /* Insert a chunk into the sorted list based on the TSNs.  The retransmit list
@@ -559,7 +530,6 @@ void sctp_retransmit(struct sctp_outq *q, struct sctp_transport *transport,
 		     sctp_retransmit_reason_t reason)
 {
 	struct net *net = sock_net(q->asoc->base.sk);
-	int error = 0;
 
 	switch (reason) {
 	case SCTP_RTXR_T3_RTX:
@@ -603,10 +573,7 @@ void sctp_retransmit(struct sctp_outq *q, struct sctp_transport *transport,
 	 * will be flushed at the end.
 	 */
 	if (reason != SCTP_RTXR_FAST_RTX)
-		error = sctp_outq_flush(q, /* rtx_timeout */ 1, GFP_ATOMIC);
-
-	if (error)
-		q->asoc->base.sk->sk_err = -error;
+		sctp_outq_flush(q, /* rtx_timeout */ 1, GFP_ATOMIC);
 }
 
 /*
@@ -778,12 +745,12 @@ redo:
 }
 
 /* Cork the outqueue so queued chunks are really queued. */
-int sctp_outq_uncork(struct sctp_outq *q, gfp_t gfp)
+void sctp_outq_uncork(struct sctp_outq *q, gfp_t gfp)
 {
 	if (q->cork)
 		q->cork = 0;
 
-	return sctp_outq_flush(q, 0, gfp);
+	sctp_outq_flush(q, 0, gfp);
 }
 
 
@@ -796,7 +763,7 @@ int sctp_outq_uncork(struct sctp_outq *q, gfp_t gfp)
  * locking concerns must be made.  Today we use the sock lock to protect
  * this function.
  */
-static int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout, gfp_t gfp)
+static void sctp_outq_flush(struct sctp_outq *q, int rtx_timeout, gfp_t gfp)
 {
 	struct sctp_packet *packet;
 	struct sctp_packet singleton;
@@ -919,8 +886,10 @@ static int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout, gfp_t gfp)
 			sctp_packet_config(&singleton, vtag, 0);
 			sctp_packet_append_chunk(&singleton, chunk);
 			error = sctp_packet_transmit(&singleton, gfp);
-			if (error < 0)
-				return error;
+			if (error < 0) {
+				asoc->base.sk->sk_err = -error;
+				return;
+			}
 			break;
 
 		case SCTP_CID_ABORT:
@@ -1018,6 +987,8 @@ static int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout, gfp_t gfp)
 		retran:
 			error = sctp_outq_flush_rtx(q, packet,
 						    rtx_timeout, &start_timer);
+			if (error < 0)
+				asoc->base.sk->sk_err = -error;
 
 			if (start_timer) {
 				sctp_transport_reset_t3_rtx(transport);
@@ -1192,14 +1163,15 @@ sctp_flush_out:
 						      struct sctp_transport,
 						      send_ready);
 		packet = &t->packet;
-		if (!sctp_packet_empty(packet))
+		if (!sctp_packet_empty(packet)) {
 			error = sctp_packet_transmit(packet, gfp);
+			if (error < 0)
+				asoc->base.sk->sk_err = -error;
+		}
 
 		/* Clear the burst limited state, if any */
 		sctp_transport_burst_reset(t);
 	}
-
-	return error;
 }
 
 /* Update unack_data based on the incoming SACK chunk */
@@ -1747,7 +1719,7 @@ static int sctp_acked(struct sctp_sackhdr *sack, __u32 tsn)
 {
 	int i;
 	sctp_sack_variable_t *frags;
-	__u16 gap;
+	__u16 tsn_offset, blocks;
 	__u32 ctsn = ntohl(sack->cum_tsn_ack);
 
 	if (TSN_lte(tsn, ctsn))
@@ -1766,10 +1738,11 @@ static int sctp_acked(struct sctp_sackhdr *sack, __u32 tsn)
 	 */
 
 	frags = sack->variable;
-	gap = tsn - ctsn;
-	for (i = 0; i < ntohs(sack->num_gap_ack_blocks); ++i) {
-		if (TSN_lte(ntohs(frags[i].gab.start), gap) &&
-		    TSN_lte(gap, ntohs(frags[i].gab.end)))
+	blocks = ntohs(sack->num_gap_ack_blocks);
+	tsn_offset = tsn - ctsn;
+	for (i = 0; i < blocks; ++i) {
+		if (tsn_offset >= ntohs(frags[i].gab.start) &&
+		    tsn_offset <= ntohs(frags[i].gab.end))
 			goto pass;
 	}