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

Pull networking updates from David Miller:
 "Highlights:

   1) Steady transitioning of the BPF instructure to a generic spot so
      all kernel subsystems can make use of it, from Alexei Starovoitov.

   2) SFC driver supports busy polling, from Alexandre Rames.

   3) Take advantage of hash table in UDP multicast delivery, from David
      Held.

   4) Lighten locking, in particular by getting rid of the LRU lists, in
      inet frag handling.  From Florian Westphal.

   5) Add support for various RFC6458 control messages in SCTP, from
      Geir Ola Vaagland.

   6) Allow to filter bridge forwarding database dumps by device, from
      Jamal Hadi Salim.

   7) virtio-net also now supports busy polling, from Jason Wang.

   8) Some low level optimization tweaks in pktgen from Jesper Dangaard
      Brouer.

   9) Add support for ipv6 address generation modes, so that userland
      can have some input into the process.  From Jiri Pirko.

  10) Consolidate common TCP connection request code in ipv4 and ipv6,
      from Octavian Purdila.

  11) New ARP packet logger in netfilter, from Pablo Neira Ayuso.

  12) Generic resizable RCU hash table, with intial users in netlink and
      nftables.  From Thomas Graf.

  13) Maintain a name assignment type so that userspace can see where a
      network device name came from (enumerated by kernel, assigned
      explicitly by userspace, etc.) From Tom Gundersen.

  14) Automatic flow label generation on transmit in ipv6, from Tom
      Herbert.

  15) New packet timestamping facilities from Willem de Bruijn, meant to
      assist in measuring latencies going into/out-of the packet
      scheduler, latency from TCP data transmission to ACK, etc"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1536 commits)
  cxgb4 : Disable recursive mailbox commands when enabling vi
  net: reduce USB network driver config options.
  tg3: Modify tg3_tso_bug() to handle multiple TX rings
  amd-xgbe: Perform phy connect/disconnect at dev open/stop
  amd-xgbe: Use dma_set_mask_and_coherent to set DMA mask
  net: sun4i-emac: fix memory leak on bad packet
  sctp: fix possible seqlock seadlock in sctp_packet_transmit()
  Revert "net: phy: Set the driver when registering an MDIO bus device"
  cxgb4vf: Turn off SGE RX/TX Callback Timers and interrupts in PCI shutdown routine
  team: Simplify return path of team_newlink
  bridge: Update outdated comment on promiscuous mode
  net-timestamp: ACK timestamp for bytestreams
  net-timestamp: TCP timestamping
  net-timestamp: SCHED timestamp on entering packet scheduler
  net-timestamp: add key to disambiguate concurrent datagrams
  net-timestamp: move timestamp flags out of sk_flags
  net-timestamp: extend SCM_TIMESTAMPING ancillary data struct
  cxgb4i : Move stray CPL definitions to cxgb4 driver
  tcp: reduce spurious retransmits due to transient SACK reneging
  qlcnic: Initialize dcbnl_ops before register_netdev
  ...

1 files changed, 26 insertions, 23 deletions

diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 0d5279fd852a..6f187c8d8a1b 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -50,6 +50,7 @@
 #include <linux/module.h>
 #include <net/netfilter/ipv6/nf_defrag_ipv6.h>
 
+static const char nf_frags_cache_name[] = "nf-frags";
 
 struct nf_ct_frag6_skb_cb
 {
@@ -63,6 +64,8 @@ struct nf_ct_frag6_skb_cb
 static struct inet_frags nf_frags;
 
 #ifdef CONFIG_SYSCTL
+static int zero;
+
 static struct ctl_table nf_ct_frag6_sysctl_table[] = {
 	{
 		.procname	= "nf_conntrack_frag6_timeout",
@@ -76,14 +79,17 @@ static struct ctl_table nf_ct_frag6_sysctl_table[] = {
 		.data		= &init_net.nf_frag.frags.low_thresh,
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= &zero,
+		.extra2		= &init_net.nf_frag.frags.high_thresh
 	},
 	{
 		.procname	= "nf_conntrack_frag6_high_thresh",
 		.data		= &init_net.nf_frag.frags.high_thresh,
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= &init_net.nf_frag.frags.low_thresh
 	},
 	{ }
 };
@@ -102,7 +108,10 @@ static int nf_ct_frag6_sysctl_register(struct net *net)
 
 		table[0].data = &net->nf_frag.frags.timeout;
 		table[1].data = &net->nf_frag.frags.low_thresh;
+		table[1].extra2 = &net->nf_frag.frags.high_thresh;
 		table[2].data = &net->nf_frag.frags.high_thresh;
+		table[2].extra1 = &net->nf_frag.frags.low_thresh;
+		table[2].extra2 = &init_net.nf_frag.frags.high_thresh;
 	}
 
 	hdr = register_net_sysctl(net, "net/netfilter", table);
@@ -147,16 +156,13 @@ static inline u8 ip6_frag_ecn(const struct ipv6hdr *ipv6h)
 static unsigned int nf_hash_frag(__be32 id, const struct in6_addr *saddr,
 				 const struct in6_addr *daddr)
 {
-	u32 c;
-
 	net_get_random_once(&nf_frags.rnd, sizeof(nf_frags.rnd));
-	c = jhash_3words(ipv6_addr_hash(saddr), ipv6_addr_hash(daddr),
-			 (__force u32)id, nf_frags.rnd);
-	return c & (INETFRAGS_HASHSZ - 1);
+	return jhash_3words(ipv6_addr_hash(saddr), ipv6_addr_hash(daddr),
+			    (__force u32)id, nf_frags.rnd);
 }
 
 
-static unsigned int nf_hashfn(struct inet_frag_queue *q)
+static unsigned int nf_hashfn(const struct inet_frag_queue *q)
 {
 	const struct frag_queue *nq;
 
@@ -196,7 +202,7 @@ static inline struct frag_queue *fq_find(struct net *net, __be32 id,
 	arg.dst = dst;
 	arg.ecn = ecn;
 
-	read_lock_bh(&nf_frags.lock);
+	local_bh_disable();
 	hash = nf_hash_frag(id, src, dst);
 
 	q = inet_frag_find(&net->nf_frag.frags, &nf_frags, &arg, hash);
@@ -217,7 +223,7 @@ static int nf_ct_frag6_queue(struct frag_queue *fq, struct sk_buff *skb,
 	int offset, end;
 	u8 ecn;
 
-	if (fq->q.last_in & INET_FRAG_COMPLETE) {
+	if (fq->q.flags & INET_FRAG_COMPLETE) {
 		pr_debug("Already completed\n");
 		goto err;
 	}
@@ -248,11 +254,11 @@ static int nf_ct_frag6_queue(struct frag_queue *fq, struct sk_buff *skb,
 		 * or have different end, the segment is corrupted.
 		 */
 		if (end < fq->q.len ||
-		    ((fq->q.last_in & INET_FRAG_LAST_IN) && end != fq->q.len)) {
+		    ((fq->q.flags & INET_FRAG_LAST_IN) && end != fq->q.len)) {
 			pr_debug("already received last fragment\n");
 			goto err;
 		}
-		fq->q.last_in |= INET_FRAG_LAST_IN;
+		fq->q.flags |= INET_FRAG_LAST_IN;
 		fq->q.len = end;
 	} else {
 		/* Check if the fragment is rounded to 8 bytes.
@@ -267,7 +273,7 @@ static int nf_ct_frag6_queue(struct frag_queue *fq, struct sk_buff *skb,
 		}
 		if (end > fq->q.len) {
 			/* Some bits beyond end -> corruption. */
-			if (fq->q.last_in & INET_FRAG_LAST_IN) {
+			if (fq->q.flags & INET_FRAG_LAST_IN) {
 				pr_debug("last packet already reached.\n");
 				goto err;
 			}
@@ -349,10 +355,9 @@ found:
 	 */
 	if (offset == 0) {
 		fq->nhoffset = nhoff;
-		fq->q.last_in |= INET_FRAG_FIRST_IN;
+		fq->q.flags |= INET_FRAG_FIRST_IN;
 	}
 
-	inet_frag_lru_move(&fq->q);
 	return 0;
 
 discard_fq:
@@ -597,10 +602,6 @@ struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb, u32 user)
 	hdr = ipv6_hdr(clone);
 	fhdr = (struct frag_hdr *)skb_transport_header(clone);
 
-	local_bh_disable();
-	inet_frag_evictor(&net->nf_frag.frags, &nf_frags, false);
-	local_bh_enable();
-
 	fq = fq_find(net, fhdr->identification, user, &hdr->saddr, &hdr->daddr,
 		     ip6_frag_ecn(hdr));
 	if (fq == NULL) {
@@ -617,7 +618,7 @@ struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb, u32 user)
 		goto ret_orig;
 	}
 
-	if (fq->q.last_in == (INET_FRAG_FIRST_IN | INET_FRAG_LAST_IN) &&
+	if (fq->q.flags == (INET_FRAG_FIRST_IN | INET_FRAG_LAST_IN) &&
 	    fq->q.meat == fq->q.len) {
 		ret_skb = nf_ct_frag6_reasm(fq, dev);
 		if (ret_skb == NULL)
@@ -677,13 +678,15 @@ int nf_ct_frag6_init(void)
 	nf_frags.qsize = sizeof(struct frag_queue);
 	nf_frags.match = ip6_frag_match;
 	nf_frags.frag_expire = nf_ct_frag6_expire;
-	nf_frags.secret_interval = 10 * 60 * HZ;
-	inet_frags_init(&nf_frags);
-
+	nf_frags.frags_cache_name = nf_frags_cache_name;
+	ret = inet_frags_init(&nf_frags);
+	if (ret)
+		goto out;
 	ret = register_pernet_subsys(&nf_ct_net_ops);
 	if (ret)
 		inet_frags_fini(&nf_frags);
 
+out:
 	return ret;
 }