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

Pull networking updates from David Miller:

 1) Unified UDP encapsulation offload methods for drivers, from
    Alexander Duyck.

 2) Make DSA binding more sane, from Andrew Lunn.

 3) Support QCA9888 chips in ath10k, from Anilkumar Kolli.

 4) Several workqueue usage cleanups, from Bhaktipriya Shridhar.

 5) Add XDP (eXpress Data Path), essentially running BPF programs on RX
    packets as soon as the device sees them, with the option to mirror
    the packet on TX via the same interface.  From Brenden Blanco and
    others.

 6) Allow qdisc/class stats dumps to run lockless, from Eric Dumazet.

 7) Add VLAN support to b53 and bcm_sf2, from Florian Fainelli.

 8) Simplify netlink conntrack entry layout, from Florian Westphal.

 9) Add ipv4 forwarding support to mlxsw spectrum driver, from Ido
    Schimmel, Yotam Gigi, and Jiri Pirko.

10) Add SKB array infrastructure and convert tun and macvtap over to it.
    From Michael S Tsirkin and Jason Wang.

11) Support qdisc packet injection in pktgen, from John Fastabend.

12) Add neighbour monitoring framework to TIPC, from Jon Paul Maloy.

13) Add NV congestion control support to TCP, from Lawrence Brakmo.

14) Add GSO support to SCTP, from Marcelo Ricardo Leitner.

15) Allow GRO and RPS to function on macsec devices, from Paolo Abeni.

16) Support MPLS over IPV4, from Simon Horman.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1622 commits)
  xgene: Fix build warning with ACPI disabled.
  be2net: perform temperature query in adapter regardless of its interface state
  l2tp: Correctly return -EBADF from pppol2tp_getname.
  net/mlx5_core/health: Remove deprecated create_singlethread_workqueue
  net: ipmr/ip6mr: update lastuse on entry change
  macsec: ensure rx_sa is set when validation is disabled
  tipc: dump monitor attributes
  tipc: add a function to get the bearer name
  tipc: get monitor threshold for the cluster
  tipc: make cluster size threshold for monitoring configurable
  tipc: introduce constants for tipc address validation
  net: neigh: disallow transition to NUD_STALE if lladdr is unchanged in neigh_update()
  MAINTAINERS: xgene: Add driver and documentation path
  Documentation: dtb: xgene: Add MDIO node
  dtb: xgene: Add MDIO node
  drivers: net: xgene: ethtool: Use phy_ethtool_gset and sset
  drivers: net: xgene: Use exported functions
  drivers: net: xgene: Enable MDIO driver
  drivers: net: xgene: Add backward compatibility
  drivers: net: phy: xgene: Add MDIO driver
  ...

1 files changed, 271 insertions, 22 deletions

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 67154b848aa9..8812e1bf6c1c 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -202,7 +202,7 @@ struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id)
 		 * could be a TCP-style listening socket or a socket which
 		 * hasn't yet called connect() to establish an association.
 		 */
-		if (!sctp_sstate(sk, ESTABLISHED))
+		if (!sctp_sstate(sk, ESTABLISHED) && !sctp_sstate(sk, CLOSING))
 			return NULL;
 
 		/* Get the first and the only association from the list. */
@@ -1068,7 +1068,7 @@ static int __sctp_connect(struct sock *sk,
 	 * is already connected.
 	 * It cannot be done even on a TCP-style listening socket.
 	 */
-	if (sctp_sstate(sk, ESTABLISHED) ||
+	if (sctp_sstate(sk, ESTABLISHED) || sctp_sstate(sk, CLOSING) ||
 	    (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) {
 		err = -EISCONN;
 		goto out_free;
@@ -1705,18 +1705,19 @@ static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
 	if (msg_name) {
 		/* Look for a matching association on the endpoint. */
 		asoc = sctp_endpoint_lookup_assoc(ep, &to, &transport);
-		if (!asoc) {
-			/* If we could not find a matching association on the
-			 * endpoint, make sure that it is not a TCP-style
-			 * socket that already has an association or there is
-			 * no peeled-off association on another socket.
-			 */
-			if ((sctp_style(sk, TCP) &&
-			     sctp_sstate(sk, ESTABLISHED)) ||
-			    sctp_endpoint_is_peeled_off(ep, &to)) {
-				err = -EADDRNOTAVAIL;
-				goto out_unlock;
-			}
+
+		/* If we could not find a matching association on the
+		 * endpoint, make sure that it is not a TCP-style
+		 * socket that already has an association or there is
+		 * no peeled-off association on another socket.
+		 */
+		if (!asoc &&
+		    ((sctp_style(sk, TCP) &&
+		      (sctp_sstate(sk, ESTABLISHED) ||
+		       sctp_sstate(sk, CLOSING))) ||
+		     sctp_endpoint_is_peeled_off(ep, &to))) {
+			err = -EADDRNOTAVAIL;
+			goto out_unlock;
 		}
 	} else {
 		asoc = sctp_id2assoc(sk, associd);
@@ -1914,6 +1915,9 @@ static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
 		goto out_free;
 	}
 
+	if (sctp_wspace(asoc) < msg_len)
+		sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc));
+
 	timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
 	if (!sctp_wspace(asoc)) {
 		err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len);
@@ -2063,7 +2067,7 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
 {
 	struct sctp_ulpevent *event = NULL;
 	struct sctp_sock *sp = sctp_sk(sk);
-	struct sk_buff *skb;
+	struct sk_buff *skb, *head_skb;
 	int copied;
 	int err = 0;
 	int skb_len;
@@ -2074,7 +2078,8 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
 
 	lock_sock(sk);
 
-	if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED)) {
+	if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) &&
+	    !sctp_sstate(sk, CLOSING)) {
 		err = -ENOTCONN;
 		goto out;
 	}
@@ -2099,12 +2104,16 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
 	if (err)
 		goto out_free;
 
-	sock_recv_ts_and_drops(msg, sk, skb);
+	if (event->chunk && event->chunk->head_skb)
+		head_skb = event->chunk->head_skb;
+	else
+		head_skb = skb;
+	sock_recv_ts_and_drops(msg, sk, head_skb);
 	if (sctp_ulpevent_is_notification(event)) {
 		msg->msg_flags |= MSG_NOTIFICATION;
 		sp->pf->event_msgname(event, msg->msg_name, addr_len);
 	} else {
-		sp->pf->skb_msgname(skb, msg->msg_name, addr_len);
+		sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len);
 	}
 
 	/* Check if we allow SCTP_NXTINFO. */
@@ -3661,6 +3670,80 @@ static int sctp_setsockopt_recvnxtinfo(struct sock *sk,
 	return 0;
 }
 
+static int sctp_setsockopt_pr_supported(struct sock *sk,
+					char __user *optval,
+					unsigned int optlen)
+{
+	struct sctp_assoc_value params;
+	struct sctp_association *asoc;
+	int retval = -EINVAL;
+
+	if (optlen != sizeof(params))
+		goto out;
+
+	if (copy_from_user(&params, optval, optlen)) {
+		retval = -EFAULT;
+		goto out;
+	}
+
+	asoc = sctp_id2assoc(sk, params.assoc_id);
+	if (asoc) {
+		asoc->prsctp_enable = !!params.assoc_value;
+	} else if (!params.assoc_id) {
+		struct sctp_sock *sp = sctp_sk(sk);
+
+		sp->ep->prsctp_enable = !!params.assoc_value;
+	} else {
+		goto out;
+	}
+
+	retval = 0;
+
+out:
+	return retval;
+}
+
+static int sctp_setsockopt_default_prinfo(struct sock *sk,
+					  char __user *optval,
+					  unsigned int optlen)
+{
+	struct sctp_default_prinfo info;
+	struct sctp_association *asoc;
+	int retval = -EINVAL;
+
+	if (optlen != sizeof(info))
+		goto out;
+
+	if (copy_from_user(&info, optval, sizeof(info))) {
+		retval = -EFAULT;
+		goto out;
+	}
+
+	if (info.pr_policy & ~SCTP_PR_SCTP_MASK)
+		goto out;
+
+	if (info.pr_policy == SCTP_PR_SCTP_NONE)
+		info.pr_value = 0;
+
+	asoc = sctp_id2assoc(sk, info.pr_assoc_id);
+	if (asoc) {
+		SCTP_PR_SET_POLICY(asoc->default_flags, info.pr_policy);
+		asoc->default_timetolive = info.pr_value;
+	} else if (!info.pr_assoc_id) {
+		struct sctp_sock *sp = sctp_sk(sk);
+
+		SCTP_PR_SET_POLICY(sp->default_flags, info.pr_policy);
+		sp->default_timetolive = info.pr_value;
+	} else {
+		goto out;
+	}
+
+	retval = 0;
+
+out:
+	return retval;
+}
+
 /* API 6.2 setsockopt(), getsockopt()
  *
  * Applications use setsockopt() and getsockopt() to set or retrieve
@@ -3821,6 +3904,12 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
 	case SCTP_RECVNXTINFO:
 		retval = sctp_setsockopt_recvnxtinfo(sk, optval, optlen);
 		break;
+	case SCTP_PR_SUPPORTED:
+		retval = sctp_setsockopt_pr_supported(sk, optval, optlen);
+		break;
+	case SCTP_DEFAULT_PRINFO:
+		retval = sctp_setsockopt_default_prinfo(sk, optval, optlen);
+		break;
 	default:
 		retval = -ENOPROTOOPT;
 		break;
@@ -4003,6 +4092,8 @@ static int sctp_init_sock(struct sock *sk)
 		return -ESOCKTNOSUPPORT;
 	}
 
+	sk->sk_gso_type = SKB_GSO_SCTP;
+
 	/* Initialize default send parameters. These parameters can be
 	 * modified with the SCTP_DEFAULT_SEND_PARAM socket option.
 	 */
@@ -4193,6 +4284,7 @@ static void sctp_shutdown(struct sock *sk, int how)
 		return;
 
 	if (how & SEND_SHUTDOWN) {
+		sk->sk_state = SCTP_SS_CLOSING;
 		ep = sctp_sk(sk)->ep;
 		if (!list_empty(&ep->asocs)) {
 			asoc = list_entry(ep->asocs.next,
@@ -4301,6 +4393,7 @@ int sctp_transport_walk_start(struct rhashtable_iter *iter)
 
 	err = rhashtable_walk_start(iter);
 	if (err && err != -EAGAIN) {
+		rhashtable_walk_stop(iter);
 		rhashtable_walk_exit(iter);
 		return err;
 	}
@@ -6163,6 +6256,148 @@ static int sctp_getsockopt_recvnxtinfo(struct sock *sk,	int len,
 	return 0;
 }
 
+static int sctp_getsockopt_pr_supported(struct sock *sk, int len,
+					char __user *optval,
+					int __user *optlen)
+{
+	struct sctp_assoc_value params;
+	struct sctp_association *asoc;
+	int retval = -EFAULT;
+
+	if (len < sizeof(params)) {
+		retval = -EINVAL;
+		goto out;
+	}
+
+	len = sizeof(params);
+	if (copy_from_user(&params, optval, len))
+		goto out;
+
+	asoc = sctp_id2assoc(sk, params.assoc_id);
+	if (asoc) {
+		params.assoc_value = asoc->prsctp_enable;
+	} else if (!params.assoc_id) {
+		struct sctp_sock *sp = sctp_sk(sk);
+
+		params.assoc_value = sp->ep->prsctp_enable;
+	} else {
+		retval = -EINVAL;
+		goto out;
+	}
+
+	if (put_user(len, optlen))
+		goto out;
+
+	if (copy_to_user(optval, &params, len))
+		goto out;
+
+	retval = 0;
+
+out:
+	return retval;
+}
+
+static int sctp_getsockopt_default_prinfo(struct sock *sk, int len,
+					  char __user *optval,
+					  int __user *optlen)
+{
+	struct sctp_default_prinfo info;
+	struct sctp_association *asoc;
+	int retval = -EFAULT;
+
+	if (len < sizeof(info)) {
+		retval = -EINVAL;
+		goto out;
+	}
+
+	len = sizeof(info);
+	if (copy_from_user(&info, optval, len))
+		goto out;
+
+	asoc = sctp_id2assoc(sk, info.pr_assoc_id);
+	if (asoc) {
+		info.pr_policy = SCTP_PR_POLICY(asoc->default_flags);
+		info.pr_value = asoc->default_timetolive;
+	} else if (!info.pr_assoc_id) {
+		struct sctp_sock *sp = sctp_sk(sk);
+
+		info.pr_policy = SCTP_PR_POLICY(sp->default_flags);
+		info.pr_value = sp->default_timetolive;
+	} else {
+		retval = -EINVAL;
+		goto out;
+	}
+
+	if (put_user(len, optlen))
+		goto out;
+
+	if (copy_to_user(optval, &info, len))
+		goto out;
+
+	retval = 0;
+
+out:
+	return retval;
+}
+
+static int sctp_getsockopt_pr_assocstatus(struct sock *sk, int len,
+					  char __user *optval,
+					  int __user *optlen)
+{
+	struct sctp_prstatus params;
+	struct sctp_association *asoc;
+	int policy;
+	int retval = -EINVAL;
+
+	if (len < sizeof(params))
+		goto out;
+
+	len = sizeof(params);
+	if (copy_from_user(&params, optval, len)) {
+		retval = -EFAULT;
+		goto out;
+	}
+
+	policy = params.sprstat_policy;
+	if (policy & ~SCTP_PR_SCTP_MASK)
+		goto out;
+
+	asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
+	if (!asoc)
+		goto out;
+
+	if (policy == SCTP_PR_SCTP_NONE) {
+		params.sprstat_abandoned_unsent = 0;
+		params.sprstat_abandoned_sent = 0;
+		for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
+			params.sprstat_abandoned_unsent +=
+				asoc->abandoned_unsent[policy];
+			params.sprstat_abandoned_sent +=
+				asoc->abandoned_sent[policy];
+		}
+	} else {
+		params.sprstat_abandoned_unsent =
+			asoc->abandoned_unsent[__SCTP_PR_INDEX(policy)];
+		params.sprstat_abandoned_sent =
+			asoc->abandoned_sent[__SCTP_PR_INDEX(policy)];
+	}
+
+	if (put_user(len, optlen)) {
+		retval = -EFAULT;
+		goto out;
+	}
+
+	if (copy_to_user(optval, &params, len)) {
+		retval = -EFAULT;
+		goto out;
+	}
+
+	retval = 0;
+
+out:
+	return retval;
+}
+
 static int sctp_getsockopt(struct sock *sk, int level, int optname,
 			   char __user *optval, int __user *optlen)
 {
@@ -6316,6 +6551,17 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
 	case SCTP_RECVNXTINFO:
 		retval = sctp_getsockopt_recvnxtinfo(sk, len, optval, optlen);
 		break;
+	case SCTP_PR_SUPPORTED:
+		retval = sctp_getsockopt_pr_supported(sk, len, optval, optlen);
+		break;
+	case SCTP_DEFAULT_PRINFO:
+		retval = sctp_getsockopt_default_prinfo(sk, len, optval,
+							optlen);
+		break;
+	case SCTP_PR_ASSOC_STATUS:
+		retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
+							optlen);
+		break;
 	default:
 		retval = -ENOPROTOOPT;
 		break;
@@ -6863,7 +7109,7 @@ static int sctp_msghdr_parse(const struct msghdr *msg, sctp_cmsgs_t *cmsgs)
 
 			if (cmsgs->srinfo->sinfo_flags &
 			    ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
-			      SCTP_SACK_IMMEDIATELY |
+			      SCTP_SACK_IMMEDIATELY | SCTP_PR_SCTP_MASK |
 			      SCTP_ABORT | SCTP_EOF))
 				return -EINVAL;
 			break;
@@ -6887,7 +7133,7 @@ static int sctp_msghdr_parse(const struct msghdr *msg, sctp_cmsgs_t *cmsgs)
 
 			if (cmsgs->sinfo->snd_flags &
 			    ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
-			      SCTP_SACK_IMMEDIATELY |
+			      SCTP_SACK_IMMEDIATELY | SCTP_PR_SCTP_MASK |
 			      SCTP_ABORT | SCTP_EOF))
 				return -EINVAL;
 			break;
@@ -7564,10 +7810,13 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
 	/* If the association on the newsk is already closed before accept()
 	 * is called, set RCV_SHUTDOWN flag.
 	 */
-	if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP))
+	if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP)) {
+		newsk->sk_state = SCTP_SS_CLOSED;
 		newsk->sk_shutdown |= RCV_SHUTDOWN;
+	} else {
+		newsk->sk_state = SCTP_SS_ESTABLISHED;
+	}
 
-	newsk->sk_state = SCTP_SS_ESTABLISHED;
 	release_sock(newsk);
 }