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

Pull networking updates from David Miller:

 1) Support ipv6 checksum offload in sunvnet driver, from Shannon
    Nelson.

 2) Move to RB-tree instead of custom AVL code in inetpeer, from Eric
    Dumazet.

 3) Allow generic XDP to work on virtual devices, from John Fastabend.

 4) Add bpf device maps and XDP_REDIRECT, which can be used to build
    arbitrary switching frameworks using XDP. From John Fastabend.

 5) Remove UFO offloads from the tree, gave us little other than bugs.

 6) Remove the IPSEC flow cache, from Florian Westphal.

 7) Support ipv6 route offload in mlxsw driver.

 8) Support VF representors in bnxt_en, from Sathya Perla.

 9) Add support for forward error correction modes to ethtool, from
    Vidya Sagar Ravipati.

10) Add time filter for packet scheduler action dumping, from Jamal Hadi
    Salim.

11) Extend the zerocopy sendmsg() used by virtio and tap to regular
    sockets via MSG_ZEROCOPY. From Willem de Bruijn.

12) Significantly rework value tracking in the BPF verifier, from Edward
    Cree.

13) Add new jump instructions to eBPF, from Daniel Borkmann.

14) Rework rtnetlink plumbing so that operations can be run without
    taking the RTNL semaphore. From Florian Westphal.

15) Support XDP in tap driver, from Jason Wang.

16) Add 32-bit eBPF JIT for ARM, from Shubham Bansal.

17) Add Huawei hinic ethernet driver.

18) Allow to report MD5 keys in TCP inet_diag dumps, from Ivan
    Delalande.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1780 commits)
  i40e: point wb_desc at the nvm_wb_desc during i40e_read_nvm_aq
  i40e: avoid NVM acquire deadlock during NVM update
  drivers: net: xgene: Remove return statement from void function
  drivers: net: xgene: Configure tx/rx delay for ACPI
  drivers: net: xgene: Read tx/rx delay for ACPI
  rocker: fix kcalloc parameter order
  rds: Fix non-atomic operation on shared flag variable
  net: sched: don't use GFP_KERNEL under spin lock
  vhost_net: correctly check tx avail during rx busy polling
  net: mdio-mux: add mdio_mux parameter to mdio_mux_init()
  rxrpc: Make service connection lookup always check for retry
  net: stmmac: Delete dead code for MDIO registration
  gianfar: Fix Tx flow control deactivation
  cxgb4: Ignore MPS_TX_INT_CAUSE[Bubble] for T6
  cxgb4: Fix pause frame count in t4_get_port_stats
  cxgb4: fix memory leak
  tun: rename generic_xdp to skb_xdp
  tun: reserve extra headroom only when XDP is set
  net: dsa: bcm_sf2: Configure IMP port TC2QOS mapping
  net: dsa: bcm_sf2: Advertise number of egress queues
  ...

5 files changed, 18 insertions, 46 deletions

diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 89cd061c4468..ac1d66d7e1fd 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -367,30 +367,6 @@ static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
 	return 0;
 }
 
-/* tipc_bearer_reset_all - reset all links on all bearers
- */
-void tipc_bearer_reset_all(struct net *net)
-{
-	struct tipc_bearer *b;
-	int i;
-
-	for (i = 0; i < MAX_BEARERS; i++) {
-		b = bearer_get(net, i);
-		if (b)
-			clear_bit_unlock(0, &b->up);
-	}
-	for (i = 0; i < MAX_BEARERS; i++) {
-		b = bearer_get(net, i);
-		if (b)
-			tipc_reset_bearer(net, b);
-	}
-	for (i = 0; i < MAX_BEARERS; i++) {
-		b = bearer_get(net, i);
-		if (b)
-			test_and_set_bit_lock(0, &b->up);
-	}
-}
-
 /**
  * bearer_disable
  *
diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h
index e07a55a80c18..42d6eeeb646d 100644
--- a/net/tipc/bearer.h
+++ b/net/tipc/bearer.h
@@ -212,7 +212,6 @@ void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest);
 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name);
 int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id);
 struct tipc_media *tipc_media_find(const char *name);
-void tipc_bearer_reset_all(struct net *net);
 int tipc_bearer_setup(void);
 void tipc_bearer_cleanup(void);
 void tipc_bearer_stop(struct net *net);
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 60820dc35a08..ac0144f532aa 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -978,15 +978,15 @@ static void link_retransmit_failure(struct tipc_link *l, struct sk_buff *skb)
 	struct tipc_msg *hdr = buf_msg(skb);
 
 	pr_warn("Retransmission failure on link <%s>\n", l->name);
-	link_print(l, "Resetting link ");
+	link_print(l, "State of link ");
 	pr_info("Failed msg: usr %u, typ %u, len %u, err %u\n",
 		msg_user(hdr), msg_type(hdr), msg_size(hdr), msg_errcode(hdr));
 	pr_info("sqno %u, prev: %x, src: %x\n",
 		msg_seqno(hdr), msg_prevnode(hdr), msg_orignode(hdr));
 }
 
-int tipc_link_retrans(struct tipc_link *l, u16 from, u16 to,
-		      struct sk_buff_head *xmitq)
+int tipc_link_retrans(struct tipc_link *l, struct tipc_link *nacker,
+		      u16 from, u16 to, struct sk_buff_head *xmitq)
 {
 	struct sk_buff *_skb, *skb = skb_peek(&l->transmq);
 	struct tipc_msg *hdr;
@@ -997,11 +997,14 @@ int tipc_link_retrans(struct tipc_link *l, u16 from, u16 to,
 		return 0;
 
 	/* Detect repeated retransmit failures on same packet */
-	if (likely(l->last_retransm != buf_seqno(skb))) {
-		l->last_retransm = buf_seqno(skb);
-		l->stale_count = 1;
-	} else if (++l->stale_count > 100) {
+	if (nacker->last_retransm != buf_seqno(skb)) {
+		nacker->last_retransm = buf_seqno(skb);
+		nacker->stale_count = 1;
+	} else if (++nacker->stale_count > 100) {
 		link_retransmit_failure(l, skb);
+		nacker->stale_count = 0;
+		if (link_is_bc_sndlink(l))
+			return TIPC_LINK_DOWN_EVT;
 		return tipc_link_fsm_evt(l, LINK_FAILURE_EVT);
 	}
 
@@ -1528,7 +1531,7 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
 
 		/* If NACK, retransmit will now start at right position */
 		if (gap) {
-			rc = tipc_link_retrans(l, ack + 1, ack + gap, xmitq);
+			rc = tipc_link_retrans(l, l, ack + 1, ack + gap, xmitq);
 			l->stats.recv_nacks++;
 		}
 
@@ -1680,7 +1683,7 @@ int tipc_link_bc_sync_rcv(struct tipc_link *l, struct tipc_msg *hdr,
 		return rc;
 
 	if (link_bc_retr_eval(snd_l, &from, &to))
-		rc = tipc_link_retrans(snd_l, from, to, xmitq);
+		rc = tipc_link_retrans(snd_l, l, from, to, xmitq);
 
 	l->snd_nxt = peers_snd_nxt;
 	if (link_bc_rcv_gap(l))
@@ -1775,7 +1778,7 @@ int tipc_link_bc_nack_rcv(struct tipc_link *l, struct sk_buff *skb,
 
 	if (dnode == tipc_own_addr(l->net)) {
 		tipc_link_bc_ack_rcv(l, acked, xmitq);
-		rc = tipc_link_retrans(l->bc_sndlink, from, to, xmitq);
+		rc = tipc_link_retrans(l->bc_sndlink, l, from, to, xmitq);
 		l->stats.recv_nacks++;
 		return rc;
 	}
diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
index 750949dfc1d7..e48f0b2c01b9 100644
--- a/net/tipc/netlink_compat.c
+++ b/net/tipc/netlink_compat.c
@@ -1217,7 +1217,7 @@ send:
 	return err;
 }
 
-static struct genl_ops tipc_genl_compat_ops[] = {
+static const struct genl_ops tipc_genl_compat_ops[] = {
 	{
 		.cmd		= TIPC_GENL_CMD,
 		.doit		= tipc_nl_compat_recv,
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 7dd22330a6b4..198dbc7adbe1 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -1284,7 +1284,7 @@ static void tipc_node_bc_sync_rcv(struct tipc_node *n, struct tipc_msg *hdr,
 	rc = tipc_bcast_sync_rcv(n->net, n->bc_entry.link, hdr);
 
 	if (rc & TIPC_LINK_DOWN_EVT) {
-		tipc_bearer_reset_all(n->net);
+		tipc_node_reset_links(n);
 		return;
 	}
 
@@ -1351,15 +1351,9 @@ static void tipc_node_bc_rcv(struct net *net, struct sk_buff *skb, int bearer_id
 	if (!skb_queue_empty(&be->inputq1))
 		tipc_node_mcast_rcv(n);
 
-	if (rc & TIPC_LINK_DOWN_EVT) {
-		/* Reception reassembly failure => reset all links to peer */
-		if (!tipc_link_is_up(be->link))
-			tipc_node_reset_links(n);
-
-		/* Retransmission failure => reset all links to all peers */
-		if (!tipc_link_is_up(tipc_bc_sndlink(net)))
-			tipc_bearer_reset_all(net);
-	}
+	/* If reassembly or retransmission failure => reset all links to peer */
+	if (rc & TIPC_LINK_DOWN_EVT)
+		tipc_node_reset_links(n);
 
 	tipc_node_put(n);
 }