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

Pull networking updates from David Miller:

 1) Significantly shrink the core networking routing structures. Result
    of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf

 2) Add netdevsim driver for testing various offloads, from Jakub
    Kicinski.

 3) Support cross-chip FDB operations in DSA, from Vivien Didelot.

 4) Add a 2nd listener hash table for TCP, similar to what was done for
    UDP. From Martin KaFai Lau.

 5) Add eBPF based queue selection to tun, from Jason Wang.

 6) Lockless qdisc support, from John Fastabend.

 7) SCTP stream interleave support, from Xin Long.

 8) Smoother TCP receive autotuning, from Eric Dumazet.

 9) Lots of erspan tunneling enhancements, from William Tu.

10) Add true function call support to BPF, from Alexei Starovoitov.

11) Add explicit support for GRO HW offloading, from Michael Chan.

12) Support extack generation in more netlink subsystems. From Alexander
    Aring, Quentin Monnet, and Jakub Kicinski.

13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
    Russell King.

14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.

15) Many improvements and simplifications to the NFP driver bpf JIT,
    from Jakub Kicinski.

16) Support for ipv6 non-equal cost multipath routing, from Ido
    Schimmel.

17) Add resource abstration to devlink, from Arkadi Sharshevsky.

18) Packet scheduler classifier shared filter block support, from Jiri
    Pirko.

19) Avoid locking in act_csum, from Davide Caratti.

20) devinet_ioctl() simplifications from Al viro.

21) More TCP bpf improvements from Lawrence Brakmo.

22) Add support for onlink ipv6 route flag, similar to ipv4, from David
    Ahern.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
  tls: Add support for encryption using async offload accelerator
  ip6mr: fix stale iterator
  net/sched: kconfig: Remove blank help texts
  openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
  tcp_nv: fix potential integer overflow in tcpnv_acked
  r8169: fix RTL8168EP take too long to complete driver initialization.
  qmi_wwan: Add support for Quectel EP06
  rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
  ipmr: Fix ptrdiff_t print formatting
  ibmvnic: Wait for device response when changing MAC
  qlcnic: fix deadlock bug
  tcp: release sk_frag.page in tcp_disconnect
  ipv4: Get the address of interface correctly.
  net_sched: gen_estimator: fix lockdep splat
  net: macb: Handle HRESP error
  net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
  ipv6: addrconf: break critical section in addrconf_verify_rtnl()
  ipv6: change route cache aging logic
  i40e/i40evf: Update DESC_NEEDED value to reflect larger value
  bnxt_en: cleanup DIM work on device shutdown
  ...

1 files changed, 32 insertions, 5 deletions

diff --git a/net/rds/send.c b/net/rds/send.c
index f72466c63f0c..d3e32d1f3c7d 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -162,6 +162,12 @@ restart:
 		goto out;
 	}
 
+	if (test_bit(RDS_DESTROY_PENDING, &cp->cp_flags)) {
+		release_in_xmit(cp);
+		ret = -ENETUNREACH; /* dont requeue send work */
+		goto out;
+	}
+
 	/*
 	 * we record the send generation after doing the xmit acquire.
 	 * if someone else manages to jump in and do some work, we'll use
@@ -437,7 +443,12 @@ over_batch:
 		    !list_empty(&cp->cp_send_queue)) && !raced) {
 			if (batch_count < send_batch_count)
 				goto restart;
-			queue_delayed_work(rds_wq, &cp->cp_send_w, 1);
+			rcu_read_lock();
+			if (test_bit(RDS_DESTROY_PENDING, &cp->cp_flags))
+				ret = -ENETUNREACH;
+			else
+				queue_delayed_work(rds_wq, &cp->cp_send_w, 1);
+			rcu_read_unlock();
 		} else if (raced) {
 			rds_stats_inc(s_send_lock_queue_raced);
 		}
@@ -1151,6 +1162,11 @@ int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len)
 	else
 		cpath = &conn->c_path[0];
 
+	if (test_bit(RDS_DESTROY_PENDING, &cpath->cp_flags)) {
+		ret = -EAGAIN;
+		goto out;
+	}
+
 	rds_conn_path_connect_if_down(cpath);
 
 	ret = rds_cong_wait(conn->c_fcong, dport, nonblock, rs);
@@ -1190,9 +1206,17 @@ int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len)
 	rds_stats_inc(s_send_queued);
 
 	ret = rds_send_xmit(cpath);
-	if (ret == -ENOMEM || ret == -EAGAIN)
-		queue_delayed_work(rds_wq, &cpath->cp_send_w, 1);
-
+	if (ret == -ENOMEM || ret == -EAGAIN) {
+		ret = 0;
+		rcu_read_lock();
+		if (test_bit(RDS_DESTROY_PENDING, &cpath->cp_flags))
+			ret = -ENETUNREACH;
+		else
+			queue_delayed_work(rds_wq, &cpath->cp_send_w, 1);
+		rcu_read_unlock();
+	}
+	if (ret)
+		goto out;
 	rds_message_put(rm);
 	return payload_len;
 
@@ -1270,7 +1294,10 @@ rds_send_probe(struct rds_conn_path *cp, __be16 sport,
 	rds_stats_inc(s_send_pong);
 
 	/* schedule the send work on rds_wq */
-	queue_delayed_work(rds_wq, &cp->cp_send_w, 1);
+	rcu_read_lock();
+	if (!test_bit(RDS_DESTROY_PENDING, &cp->cp_flags))
+		queue_delayed_work(rds_wq, &cp->cp_send_w, 1);
+	rcu_read_unlock();
 
 	rds_message_put(rm);
 	return 0;