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

Pull networking changes from David Miller:

1) Allow to dump, monitor, and change the bridge multicast database
   using netlink.  From Cong Wang.

2) RFC 5961 TCP blind data injection attack mitigation, from Eric
   Dumazet.

3) Networking user namespace support from Eric W. Biederman.

4) tuntap/virtio-net multiqueue support by Jason Wang.

5) Support for checksum offload of encapsulated packets (basically,
   tunneled traffic can still be checksummed by HW).  From Joseph
   Gasparakis.

6) Allow BPF filter access to VLAN tags, from Eric Dumazet and
   Daniel Borkmann.

7) Bridge port parameters over netlink and BPDU blocking support
   from Stephen Hemminger.

8) Improve data access patterns during inet socket demux by rearranging
   socket layout, from Eric Dumazet.

9) TIPC protocol updates and cleanups from Ying Xue, Paul Gortmaker, and
   Jon Maloy.

10) Update TCP socket hash sizing to be more in line with current day
    realities.  The existing heurstics were choosen a decade ago.
    From Eric Dumazet.

11) Fix races, queue bloat, and excessive wakeups in ATM and
    associated drivers, from Krzysztof Mazur and David Woodhouse.

12) Support DOVE (Distributed Overlay Virtual Ethernet) extensions
    in VXLAN driver, from David Stevens.

13) Add "oops_only" mode to netconsole, from Amerigo Wang.

14) Support set and query of VEB/VEPA bridge mode via PF_BRIDGE, also
    allow DCB netlink to work on namespaces other than the initial
    namespace.  From John Fastabend.

15) Support PTP in the Tigon3 driver, from Matt Carlson.

16) tun/vhost zero copy fixes and improvements, plus turn it on
    by default, from Michael S. Tsirkin.

17) Support per-association statistics in SCTP, from Michele
    Baldessari.

And many, many, driver updates, cleanups, and improvements.  Too
numerous to mention individually.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1722 commits)
  net/mlx4_en: Add support for destination MAC in steering rules
  net/mlx4_en: Use generic etherdevice.h functions.
  net: ethtool: Add destination MAC address to flow steering API
  bridge: add support of adding and deleting mdb entries
  bridge: notify mdb changes via netlink
  ndisc: Unexport ndisc_{build,send}_skb().
  uapi: add missing netconf.h to export list
  pkt_sched: avoid requeues if possible
  solos-pci: fix double-free of TX skb in DMA mode
  bnx2: Fix accidental reversions.
  bna: Driver Version Updated to 3.1.2.1
  bna: Firmware update
  bna: Add RX State
  bna: Rx Page Based Allocation
  bna: TX Intr Coalescing Fix
  bna: Tx and Rx Optimizations
  bna: Code Cleanup and Enhancements
  ath9k: check pdata variable before dereferencing it
  ath5k: RX timestamp is reported at end of frame
  ath9k_htc: RX timestamp is reported at end of frame
  ...

1 files changed, 11 insertions, 99 deletions

diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 4ec5c80e8a7c..aa62f93a9127 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -279,116 +279,31 @@ void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest)
 }
 
 /*
- * bearer_push(): Resolve bearer congestion. Force the waiting
- * links to push out their unsent packets, one packet per link
- * per iteration, until all packets are gone or congestion reoccurs.
- * 'tipc_net_lock' is read_locked when this function is called
- * bearer.lock must be taken before calling
- * Returns binary true(1) ore false(0)
- */
-static int bearer_push(struct tipc_bearer *b_ptr)
-{
-	u32 res = 0;
-	struct tipc_link *ln, *tln;
-
-	if (b_ptr->blocked)
-		return 0;
-
-	while (!list_empty(&b_ptr->cong_links) && (res != PUSH_FAILED)) {
-		list_for_each_entry_safe(ln, tln, &b_ptr->cong_links, link_list) {
-			res = tipc_link_push_packet(ln);
-			if (res == PUSH_FAILED)
-				break;
-			if (res == PUSH_FINISHED)
-				list_move_tail(&ln->link_list, &b_ptr->links);
-		}
-	}
-	return list_empty(&b_ptr->cong_links);
-}
-
-void tipc_bearer_lock_push(struct tipc_bearer *b_ptr)
-{
-	spin_lock_bh(&b_ptr->lock);
-	bearer_push(b_ptr);
-	spin_unlock_bh(&b_ptr->lock);
-}
-
-
-/*
- * Interrupt enabling new requests after bearer congestion or blocking:
+ * Interrupt enabling new requests after bearer blocking:
  * See bearer_send().
  */
-void tipc_continue(struct tipc_bearer *b_ptr)
+void tipc_continue(struct tipc_bearer *b)
 {
-	spin_lock_bh(&b_ptr->lock);
-	if (!list_empty(&b_ptr->cong_links))
-		tipc_k_signal((Handler)tipc_bearer_lock_push, (unsigned long)b_ptr);
-	b_ptr->blocked = 0;
-	spin_unlock_bh(&b_ptr->lock);
+	spin_lock_bh(&b->lock);
+	b->blocked = 0;
+	spin_unlock_bh(&b->lock);
 }
 
 /*
- * Schedule link for sending of messages after the bearer
- * has been deblocked by 'continue()'. This method is called
- * when somebody tries to send a message via this link while
- * the bearer is congested. 'tipc_net_lock' is in read_lock here
- * bearer.lock is busy
+ * tipc_bearer_blocked - determines if bearer is currently blocked
  */
-static void tipc_bearer_schedule_unlocked(struct tipc_bearer *b_ptr,
-						struct tipc_link *l_ptr)
+int tipc_bearer_blocked(struct tipc_bearer *b)
 {
-	list_move_tail(&l_ptr->link_list, &b_ptr->cong_links);
-}
-
-/*
- * Schedule link for sending of messages after the bearer
- * has been deblocked by 'continue()'. This method is called
- * when somebody tries to send a message via this link while
- * the bearer is congested. 'tipc_net_lock' is in read_lock here,
- * bearer.lock is free
- */
-void tipc_bearer_schedule(struct tipc_bearer *b_ptr, struct tipc_link *l_ptr)
-{
-	spin_lock_bh(&b_ptr->lock);
-	tipc_bearer_schedule_unlocked(b_ptr, l_ptr);
-	spin_unlock_bh(&b_ptr->lock);
-}
-
+	int res;
 
-/*
- * tipc_bearer_resolve_congestion(): Check if there is bearer congestion,
- * and if there is, try to resolve it before returning.
- * 'tipc_net_lock' is read_locked when this function is called
- */
-int tipc_bearer_resolve_congestion(struct tipc_bearer *b_ptr,
-					struct tipc_link *l_ptr)
-{
-	int res = 1;
+	spin_lock_bh(&b->lock);
+	res = b->blocked;
+	spin_unlock_bh(&b->lock);
 
-	if (list_empty(&b_ptr->cong_links))
-		return 1;
-	spin_lock_bh(&b_ptr->lock);
-	if (!bearer_push(b_ptr)) {
-		tipc_bearer_schedule_unlocked(b_ptr, l_ptr);
-		res = 0;
-	}
-	spin_unlock_bh(&b_ptr->lock);
 	return res;
 }
 
 /**
- * tipc_bearer_congested - determines if bearer is currently congested
- */
-int tipc_bearer_congested(struct tipc_bearer *b_ptr, struct tipc_link *l_ptr)
-{
-	if (unlikely(b_ptr->blocked))
-		return 1;
-	if (likely(list_empty(&b_ptr->cong_links)))
-		return 0;
-	return !tipc_bearer_resolve_congestion(b_ptr, l_ptr);
-}
-
-/**
  * tipc_enable_bearer - enable bearer with the given name
  */
 int tipc_enable_bearer(const char *name, u32 disc_domain, u32 priority)
@@ -489,7 +404,6 @@ restart:
 	b_ptr->net_plane = bearer_id + 'A';
 	b_ptr->active = 1;
 	b_ptr->priority = priority;
-	INIT_LIST_HEAD(&b_ptr->cong_links);
 	INIT_LIST_HEAD(&b_ptr->links);
 	spin_lock_init(&b_ptr->lock);
 
@@ -528,7 +442,6 @@ int tipc_block_bearer(const char *name)
 	pr_info("Blocking bearer <%s>\n", name);
 	spin_lock_bh(&b_ptr->lock);
 	b_ptr->blocked = 1;
-	list_splice_init(&b_ptr->cong_links, &b_ptr->links);
 	list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) {
 		struct tipc_node *n_ptr = l_ptr->owner;
 
@@ -555,7 +468,6 @@ static void bearer_disable(struct tipc_bearer *b_ptr)
 	spin_lock_bh(&b_ptr->lock);
 	b_ptr->blocked = 1;
 	b_ptr->media->disable_bearer(b_ptr);
-	list_splice_init(&b_ptr->cong_links, &b_ptr->links);
 	list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) {
 		tipc_link_delete(l_ptr);
 	}