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

Pull networking updates from David Millar:
 "Here are some highlights from the 2065 networking commits that
  happened this development cycle:

   1) XDP support for IXGBE (John Fastabend) and thunderx (Sunil Kowuri)

   2) Add a generic XDP driver, so that anyone can test XDP even if they
      lack a networking device whose driver has explicit XDP support
      (me).

   3) Sparc64 now has an eBPF JIT too (me)

   4) Add a BPF program testing framework via BPF_PROG_TEST_RUN (Alexei
      Starovoitov)

   5) Make netfitler network namespace teardown less expensive (Florian
      Westphal)

   6) Add symmetric hashing support to nft_hash (Laura Garcia Liebana)

   7) Implement NAPI and GRO in netvsc driver (Stephen Hemminger)

   8) Support TC flower offload statistics in mlxsw (Arkadi Sharshevsky)

   9) Multiqueue support in stmmac driver (Joao Pinto)

  10) Remove TCP timewait recycling, it never really could possibly work
      well in the real world and timestamp randomization really zaps any
      hint of usability this feature had (Soheil Hassas Yeganeh)

  11) Support level3 vs level4 ECMP route hashing in ipv4 (Nikolay
      Aleksandrov)

  12) Add socket busy poll support to epoll (Sridhar Samudrala)

  13) Netlink extended ACK support (Johannes Berg, Pablo Neira Ayuso,
      and several others)

  14) IPSEC hw offload infrastructure (Steffen Klassert)"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2065 commits)
  tipc: refactor function tipc_sk_recv_stream()
  tipc: refactor function tipc_sk_recvmsg()
  net: thunderx: Optimize page recycling for XDP
  net: thunderx: Support for XDP header adjustment
  net: thunderx: Add support for XDP_TX
  net: thunderx: Add support for XDP_DROP
  net: thunderx: Add basic XDP support
  net: thunderx: Cleanup receive buffer allocation
  net: thunderx: Optimize CQE_TX handling
  net: thunderx: Optimize RBDR descriptor handling
  net: thunderx: Support for page recycling
  ipx: call ipxitf_put() in ioctl error path
  net: sched: add helpers to handle extended actions
  qed*: Fix issues in the ptp filter config implementation.
  qede: Fix concurrency issue in PTP Tx path processing.
  stmmac: Add support for SIMATIC IOT2000 platform
  net: hns: fix ethtool_get_strings overflow in hns driver
  tcp: fix wraparound issue in tcp_lp
  bpf, arm64: fix jit branch offset related to ldimm64
  bpf, arm64: implement jiting of BPF_XADD
  ...

1 files changed, 102 insertions, 81 deletions

diff --git a/net/can/af_can.c b/net/can/af_can.c
index 5488e4a6ccd0..b6406fe33c76 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -2,7 +2,7 @@
  * af_can.c - Protocol family CAN core module
  *            (used by different CAN protocol modules)
  *
- * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
+ * Copyright (c) 2002-2017 Volkswagen Group Electronic Research
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -75,20 +75,12 @@ static int stats_timer __read_mostly = 1;
 module_param(stats_timer, int, S_IRUGO);
 MODULE_PARM_DESC(stats_timer, "enable timer for statistics (default:on)");
 
-/* receive filters subscribed for 'all' CAN devices */
-struct dev_rcv_lists can_rx_alldev_list;
-static DEFINE_SPINLOCK(can_rcvlists_lock);
-
 static struct kmem_cache *rcv_cache __read_mostly;
 
 /* table of registered CAN protocols */
 static const struct can_proto *proto_tab[CAN_NPROTO] __read_mostly;
 static DEFINE_MUTEX(proto_tab_lock);
 
-struct timer_list can_stattimer;   /* timer for statistics update */
-struct s_stats    can_stats;       /* packet statistics */
-struct s_pstats   can_pstats;      /* receive list statistics */
-
 static atomic_t skbcounter = ATOMIC_INIT(0);
 
 /*
@@ -145,9 +137,6 @@ static int can_create(struct net *net, struct socket *sock, int protocol,
 	if (protocol < 0 || protocol >= CAN_NPROTO)
 		return -EINVAL;
 
-	if (!net_eq(net, &init_net))
-		return -EAFNOSUPPORT;
-
 	cp = can_get_proto(protocol);
 
 #ifdef CONFIG_MODULES
@@ -228,6 +217,7 @@ int can_send(struct sk_buff *skb, int loop)
 {
 	struct sk_buff *newskb = NULL;
 	struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
+	struct s_stats *can_stats = dev_net(skb->dev)->can.can_stats;
 	int err = -EINVAL;
 
 	if (skb->len == CAN_MTU) {
@@ -316,8 +306,8 @@ int can_send(struct sk_buff *skb, int loop)
 		netif_rx_ni(newskb);
 
 	/* update statistics */
-	can_stats.tx_frames++;
-	can_stats.tx_frames_delta++;
+	can_stats->tx_frames++;
+	can_stats->tx_frames_delta++;
 
 	return 0;
 
@@ -331,10 +321,11 @@ EXPORT_SYMBOL(can_send);
  * af_can rx path
  */
 
-static struct dev_rcv_lists *find_dev_rcv_lists(struct net_device *dev)
+static struct dev_rcv_lists *find_dev_rcv_lists(struct net *net,
+						struct net_device *dev)
 {
 	if (!dev)
-		return &can_rx_alldev_list;
+		return net->can.can_rx_alldev_list;
 	else
 		return (struct dev_rcv_lists *)dev->ml_priv;
 }
@@ -467,13 +458,14 @@ static struct hlist_head *find_rcv_list(canid_t *can_id, canid_t *mask,
  *  -ENOMEM on missing cache mem to create subscription entry
  *  -ENODEV unknown device
  */
-int can_rx_register(struct net_device *dev, canid_t can_id, canid_t mask,
-		    void (*func)(struct sk_buff *, void *), void *data,
-		    char *ident, struct sock *sk)
+int can_rx_register(struct net *net, struct net_device *dev, canid_t can_id,
+		    canid_t mask, void (*func)(struct sk_buff *, void *),
+		    void *data, char *ident, struct sock *sk)
 {
 	struct receiver *r;
 	struct hlist_head *rl;
 	struct dev_rcv_lists *d;
+	struct s_pstats *can_pstats = net->can.can_pstats;
 	int err = 0;
 
 	/* insert new receiver  (dev,canid,mask) -> (func,data) */
@@ -481,13 +473,16 @@ int can_rx_register(struct net_device *dev, canid_t can_id, canid_t mask,
 	if (dev && dev->type != ARPHRD_CAN)
 		return -ENODEV;
 
+	if (dev && !net_eq(net, dev_net(dev)))
+		return -ENODEV;
+
 	r = kmem_cache_alloc(rcv_cache, GFP_KERNEL);
 	if (!r)
 		return -ENOMEM;
 
-	spin_lock(&can_rcvlists_lock);
+	spin_lock(&net->can.can_rcvlists_lock);
 
-	d = find_dev_rcv_lists(dev);
+	d = find_dev_rcv_lists(net, dev);
 	if (d) {
 		rl = find_rcv_list(&can_id, &mask, d);
 
@@ -502,15 +497,15 @@ int can_rx_register(struct net_device *dev, canid_t can_id, canid_t mask,
 		hlist_add_head_rcu(&r->list, rl);
 		d->entries++;
 
-		can_pstats.rcv_entries++;
-		if (can_pstats.rcv_entries_max < can_pstats.rcv_entries)
-			can_pstats.rcv_entries_max = can_pstats.rcv_entries;
+		can_pstats->rcv_entries++;
+		if (can_pstats->rcv_entries_max < can_pstats->rcv_entries)
+			can_pstats->rcv_entries_max = can_pstats->rcv_entries;
 	} else {
 		kmem_cache_free(rcv_cache, r);
 		err = -ENODEV;
 	}
 
-	spin_unlock(&can_rcvlists_lock);
+	spin_unlock(&net->can.can_rcvlists_lock);
 
 	return err;
 }
@@ -540,19 +535,24 @@ static void can_rx_delete_receiver(struct rcu_head *rp)
  * Description:
  *  Removes subscription entry depending on given (subscription) values.
  */
-void can_rx_unregister(struct net_device *dev, canid_t can_id, canid_t mask,
-		       void (*func)(struct sk_buff *, void *), void *data)
+void can_rx_unregister(struct net *net, struct net_device *dev, canid_t can_id,
+		       canid_t mask, void (*func)(struct sk_buff *, void *),
+		       void *data)
 {
 	struct receiver *r = NULL;
 	struct hlist_head *rl;
+	struct s_pstats *can_pstats = net->can.can_pstats;
 	struct dev_rcv_lists *d;
 
 	if (dev && dev->type != ARPHRD_CAN)
 		return;
 
-	spin_lock(&can_rcvlists_lock);
+	if (dev && !net_eq(net, dev_net(dev)))
+		return;
+
+	spin_lock(&net->can.can_rcvlists_lock);
 
-	d = find_dev_rcv_lists(dev);
+	d = find_dev_rcv_lists(net, dev);
 	if (!d) {
 		pr_err("BUG: receive list not found for "
 		       "dev %s, id %03X, mask %03X\n",
@@ -588,8 +588,8 @@ void can_rx_unregister(struct net_device *dev, canid_t can_id, canid_t mask,
 	hlist_del_rcu(&r->list);
 	d->entries--;
 
-	if (can_pstats.rcv_entries > 0)
-		can_pstats.rcv_entries--;
+	if (can_pstats->rcv_entries > 0)
+		can_pstats->rcv_entries--;
 
 	/* remove device structure requested by NETDEV_UNREGISTER */
 	if (d->remove_on_zero_entries && !d->entries) {
@@ -598,7 +598,7 @@ void can_rx_unregister(struct net_device *dev, canid_t can_id, canid_t mask,
 	}
 
  out:
-	spin_unlock(&can_rcvlists_lock);
+	spin_unlock(&net->can.can_rcvlists_lock);
 
 	/* schedule the receiver item for deletion */
 	if (r) {
@@ -683,11 +683,13 @@ static int can_rcv_filter(struct dev_rcv_lists *d, struct sk_buff *skb)
 static void can_receive(struct sk_buff *skb, struct net_device *dev)
 {
 	struct dev_rcv_lists *d;
+	struct net *net = dev_net(dev);
+	struct s_stats *can_stats = net->can.can_stats;
 	int matches;
 
 	/* update statistics */
-	can_stats.rx_frames++;
-	can_stats.rx_frames_delta++;
+	can_stats->rx_frames++;
+	can_stats->rx_frames_delta++;
 
 	/* create non-zero unique skb identifier together with *skb */
 	while (!(can_skb_prv(skb)->skbcnt))
@@ -696,10 +698,10 @@ static void can_receive(struct sk_buff *skb, struct net_device *dev)
 	rcu_read_lock();
 
 	/* deliver the packet to sockets listening on all devices */
-	matches = can_rcv_filter(&can_rx_alldev_list, skb);
+	matches = can_rcv_filter(net->can.can_rx_alldev_list, skb);
 
 	/* find receive list for this device */
-	d = find_dev_rcv_lists(dev);
+	d = find_dev_rcv_lists(net, dev);
 	if (d)
 		matches += can_rcv_filter(d, skb);
 
@@ -709,8 +711,8 @@ static void can_receive(struct sk_buff *skb, struct net_device *dev)
 	consume_skb(skb);
 
 	if (matches > 0) {
-		can_stats.matches++;
-		can_stats.matches_delta++;
+		can_stats->matches++;
+		can_stats->matches_delta++;
 	}
 }
 
@@ -719,9 +721,6 @@ static int can_rcv(struct sk_buff *skb, struct net_device *dev,
 {
 	struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
 
-	if (unlikely(!net_eq(dev_net(dev), &init_net)))
-		goto drop;
-
 	if (WARN_ONCE(dev->type != ARPHRD_CAN ||
 		      skb->len != CAN_MTU ||
 		      cfd->len > CAN_MAX_DLEN,
@@ -743,9 +742,6 @@ static int canfd_rcv(struct sk_buff *skb, struct net_device *dev,
 {
 	struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
 
-	if (unlikely(!net_eq(dev_net(dev), &init_net)))
-		goto drop;
-
 	if (WARN_ONCE(dev->type != ARPHRD_CAN ||
 		      skb->len != CANFD_MTU ||
 		      cfd->len > CANFD_MAX_DLEN,
@@ -835,9 +831,6 @@ static int can_notifier(struct notifier_block *nb, unsigned long msg,
 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 	struct dev_rcv_lists *d;
 
-	if (!net_eq(dev_net(dev), &init_net))
-		return NOTIFY_DONE;
-
 	if (dev->type != ARPHRD_CAN)
 		return NOTIFY_DONE;
 
@@ -855,7 +848,7 @@ static int can_notifier(struct notifier_block *nb, unsigned long msg,
 		break;
 
 	case NETDEV_UNREGISTER:
-		spin_lock(&can_rcvlists_lock);
+		spin_lock(&dev_net(dev)->can.can_rcvlists_lock);
 
 		d = dev->ml_priv;
 		if (d) {
@@ -869,7 +862,7 @@ static int can_notifier(struct notifier_block *nb, unsigned long msg,
 			pr_err("can: notifier: receive list not found for dev "
 			       "%s\n", dev->name);
 
-		spin_unlock(&can_rcvlists_lock);
+		spin_unlock(&dev_net(dev)->can.can_rcvlists_lock);
 
 		break;
 	}
@@ -877,6 +870,59 @@ static int can_notifier(struct notifier_block *nb, unsigned long msg,
 	return NOTIFY_DONE;
 }
 
+static int can_pernet_init(struct net *net)
+{
+	net->can.can_rcvlists_lock =
+		__SPIN_LOCK_UNLOCKED(net->can.can_rcvlists_lock);
+	net->can.can_rx_alldev_list =
+		kzalloc(sizeof(struct dev_rcv_lists), GFP_KERNEL);
+
+	net->can.can_stats = kzalloc(sizeof(struct s_stats), GFP_KERNEL);
+	net->can.can_pstats = kzalloc(sizeof(struct s_pstats), GFP_KERNEL);
+
+	if (IS_ENABLED(CONFIG_PROC_FS)) {
+		/* the statistics are updated every second (timer triggered) */
+		if (stats_timer) {
+			setup_timer(&net->can.can_stattimer, can_stat_update,
+				    (unsigned long)net);
+			mod_timer(&net->can.can_stattimer,
+				  round_jiffies(jiffies + HZ));
+		}
+		net->can.can_stats->jiffies_init = jiffies;
+		can_init_proc(net);
+	}
+
+	return 0;
+}
+
+static void can_pernet_exit(struct net *net)
+{
+	struct net_device *dev;
+
+	if (IS_ENABLED(CONFIG_PROC_FS)) {
+		can_remove_proc(net);
+		if (stats_timer)
+			del_timer_sync(&net->can.can_stattimer);
+	}
+
+	/* remove created dev_rcv_lists from still registered CAN devices */
+	rcu_read_lock();
+	for_each_netdev_rcu(net, dev) {
+		if (dev->type == ARPHRD_CAN && dev->ml_priv) {
+			struct dev_rcv_lists *d = dev->ml_priv;
+
+			BUG_ON(d->entries);
+			kfree(d);
+			dev->ml_priv = NULL;
+		}
+	}
+	rcu_read_unlock();
+
+	kfree(net->can.can_rx_alldev_list);
+	kfree(net->can.can_stats);
+	kfree(net->can.can_pstats);
+}
+
 /*
  * af_can module init/exit functions
  */
@@ -902,6 +948,11 @@ static struct notifier_block can_netdev_notifier __read_mostly = {
 	.notifier_call = can_notifier,
 };
 
+static struct pernet_operations can_pernet_ops __read_mostly = {
+	.init = can_pernet_init,
+	.exit = can_pernet_exit,
+};
+
 static __init int can_init(void)
 {
 	/* check for correct padding to be able to use the structs similarly */
@@ -912,21 +963,12 @@ static __init int can_init(void)
 
 	pr_info("can: controller area network core (" CAN_VERSION_STRING ")\n");
 
-	memset(&can_rx_alldev_list, 0, sizeof(can_rx_alldev_list));
-
 	rcv_cache = kmem_cache_create("can_receiver", sizeof(struct receiver),
 				      0, 0, NULL);
 	if (!rcv_cache)
 		return -ENOMEM;
 
-	if (IS_ENABLED(CONFIG_PROC_FS)) {
-		if (stats_timer) {
-		/* the statistics are updated every second (timer triggered) */
-			setup_timer(&can_stattimer, can_stat_update, 0);
-			mod_timer(&can_stattimer, round_jiffies(jiffies + HZ));
-		}
-		can_init_proc();
-	}
+	register_pernet_subsys(&can_pernet_ops);
 
 	/* protocol register */
 	sock_register(&can_family_ops);
@@ -939,34 +981,13 @@ static __init int can_init(void)
 
 static __exit void can_exit(void)
 {
-	struct net_device *dev;
-
-	if (IS_ENABLED(CONFIG_PROC_FS)) {
-		if (stats_timer)
-			del_timer_sync(&can_stattimer);
-
-		can_remove_proc();
-	}
-
 	/* protocol unregister */
 	dev_remove_pack(&canfd_packet);
 	dev_remove_pack(&can_packet);
 	unregister_netdevice_notifier(&can_netdev_notifier);
 	sock_unregister(PF_CAN);
 
-	/* remove created dev_rcv_lists from still registered CAN devices */
-	rcu_read_lock();
-	for_each_netdev_rcu(&init_net, dev) {
-		if (dev->type == ARPHRD_CAN && dev->ml_priv) {
-
-			struct dev_rcv_lists *d = dev->ml_priv;
-
-			BUG_ON(d->entries);
-			kfree(d);
-			dev->ml_priv = NULL;
-		}
-	}
-	rcu_read_unlock();
+	unregister_pernet_subsys(&can_pernet_ops);
 
 	rcu_barrier(); /* Wait for completion of call_rcu()'s */