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

Pull networking updates from David Miller:
 "Highlights:

   1) Support more Realtek wireless chips, from Jes Sorenson.

   2) New BPF types for per-cpu hash and arrap maps, from Alexei
      Starovoitov.

   3) Make several TCP sysctls per-namespace, from Nikolay Borisov.

   4) Allow the use of SO_REUSEPORT in order to do per-thread processing
   of incoming TCP/UDP connections.  The muxing can be done using a
   BPF program which hashes the incoming packet.  From Craig Gallek.

   5) Add a multiplexer for TCP streams, to provide a messaged based
      interface.  BPF programs can be used to determine the message
      boundaries.  From Tom Herbert.

   6) Add 802.1AE MACSEC support, from Sabrina Dubroca.

   7) Avoid factorial complexity when taking down an inetdev interface
      with lots of configured addresses.  We were doing things like
      traversing the entire address less for each address removed, and
      flushing the entire netfilter conntrack table for every address as
      well.

   8) Add and use SKB bulk free infrastructure, from Jesper Brouer.

   9) Allow offloading u32 classifiers to hardware, and implement for
      ixgbe, from John Fastabend.

  10) Allow configuring IRQ coalescing parameters on a per-queue basis,
      from Kan Liang.

  11) Extend ethtool so that larger link mode masks can be supported.
      From David Decotigny.

  12) Introduce devlink, which can be used to configure port link types
      (ethernet vs Infiniband, etc.), port splitting, and switch device
      level attributes as a whole.  From Jiri Pirko.

  13) Hardware offload support for flower classifiers, from Amir Vadai.

  14) Add "Local Checksum Offload".  Basically, for a tunneled packet
      the checksum of the outer header is 'constant' (because with the
      checksum field filled into the inner protocol header, the payload
      of the outer frame checksums to 'zero'), and we can take advantage
      of that in various ways.  From Edward Cree"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1548 commits)
  bonding: fix bond_get_stats()
  net: bcmgenet: fix dma api length mismatch
  net/mlx4_core: Fix backward compatibility on VFs
  phy: mdio-thunder: Fix some Kconfig typos
  lan78xx: add ndo_get_stats64
  lan78xx: handle statistics counter rollover
  RDS: TCP: Remove unused constant
  RDS: TCP: Add sysctl tunables for sndbuf/rcvbuf on rds-tcp socket
  net: smc911x: convert pxa dma to dmaengine
  team: remove duplicate set of flag IFF_MULTICAST
  bonding: remove duplicate set of flag IFF_MULTICAST
  net: fix a comment typo
  ethernet: micrel: fix some error codes
  ip_tunnels, bpf: define IP_TUNNEL_OPTS_MAX and use it
  bpf, dst: add and use dst_tclassid helper
  bpf: make skb->tc_classid also readable
  net: mvneta: bm: clarify dependencies
  cls_bpf: reset class and reuse major in da
  ldmvsw: Checkpatch sunvnet.c and sunvnet_common.c
  ldmvsw: Add ldmvsw.c driver code
  ...

1 files changed, 42 insertions, 11 deletions

diff --git a/include/net/tcp.h b/include/net/tcp.h
index b04bc989ad6c..b91370f61be6 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -238,13 +238,6 @@ extern struct inet_timewait_death_row tcp_death_row;
 extern int sysctl_tcp_timestamps;
 extern int sysctl_tcp_window_scaling;
 extern int sysctl_tcp_sack;
-extern int sysctl_tcp_fin_timeout;
-extern int sysctl_tcp_syn_retries;
-extern int sysctl_tcp_synack_retries;
-extern int sysctl_tcp_retries1;
-extern int sysctl_tcp_retries2;
-extern int sysctl_tcp_orphan_retries;
-extern int sysctl_tcp_syncookies;
 extern int sysctl_tcp_fastopen;
 extern int sysctl_tcp_retrans_collapse;
 extern int sysctl_tcp_stdurg;
@@ -273,7 +266,6 @@ extern int sysctl_tcp_thin_dupack;
 extern int sysctl_tcp_early_retrans;
 extern int sysctl_tcp_limit_output_bytes;
 extern int sysctl_tcp_challenge_ack_limit;
-extern unsigned int sysctl_tcp_notsent_lowat;
 extern int sysctl_tcp_min_tso_segs;
 extern int sysctl_tcp_min_rtt_wlen;
 extern int sysctl_tcp_autocorking;
@@ -567,6 +559,7 @@ void tcp_rearm_rto(struct sock *sk);
 void tcp_synack_rtt_meas(struct sock *sk, struct request_sock *req);
 void tcp_reset(struct sock *sk);
 void tcp_skb_mark_lost_uncond_verify(struct tcp_sock *tp, struct sk_buff *skb);
+void tcp_fin(struct sock *sk);
 
 /* tcp_timer.c */
 void tcp_init_xmit_timers(struct sock *);
@@ -962,9 +955,11 @@ static inline void tcp_enable_fack(struct tcp_sock *tp)
  */
 static inline void tcp_enable_early_retrans(struct tcp_sock *tp)
 {
+        struct net *net = sock_net((struct sock *)tp);
+
         tp->do_early_retrans = sysctl_tcp_early_retrans &&
                 sysctl_tcp_early_retrans < 4 && !sysctl_tcp_thin_dupack &&
-                sysctl_tcp_reordering == 3;
+                net->ipv4.sysctl_tcp_reordering == 3;
 }
 
 static inline void tcp_disable_early_retrans(struct tcp_sock *tp)
@@ -1251,7 +1246,7 @@ static inline u32 keepalive_time_elapsed(const struct tcp_sock *tp)
 
 static inline int tcp_fin_time(const struct sock *sk)
 {
-        int fin_timeout = tcp_sk(sk)->linger2 ? : sysctl_tcp_fin_timeout;
+        int fin_timeout = tcp_sk(sk)->linger2 ? : sock_net(sk)->ipv4.sysctl_tcp_fin_timeout;
         const int rto = inet_csk(sk)->icsk_rto;
 
         if (fin_timeout < (rto << 2) - (rto >> 1))
@@ -1433,6 +1428,7 @@ void tcp_free_fastopen_req(struct tcp_sock *tp);
 
 extern struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
 int tcp_fastopen_reset_cipher(void *key, unsigned int len);
+void tcp_fastopen_add_skb(struct sock *sk, struct sk_buff *skb);
 struct sock *tcp_try_fastopen(struct sock *sk, struct sk_buff *skb,
                               struct request_sock *req,
                               struct tcp_fastopen_cookie *foc,
@@ -1681,7 +1677,8 @@ void __tcp_v4_send_check(struct sk_buff *skb, __be32 saddr, __be32 daddr);
 
 static inline u32 tcp_notsent_lowat(const struct tcp_sock *tp)
 {
-        return tp->notsent_lowat ?: sysctl_tcp_notsent_lowat;
+        struct net *net = sock_net((struct sock *)tp);
+        return tp->notsent_lowat ?: net->ipv4.sysctl_tcp_notsent_lowat;
 }
 
 static inline bool tcp_stream_memory_free(const struct sock *sk)
@@ -1815,4 +1812,38 @@ static inline void skb_set_tcp_pure_ack(struct sk_buff *skb)
         skb->truesize = 2;
 }
 
+static inline int tcp_inq(struct sock *sk)
+{
+        struct tcp_sock *tp = tcp_sk(sk);
+        int answ;
+
+        if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
+                answ = 0;
+        } else if (sock_flag(sk, SOCK_URGINLINE) ||
+                   !tp->urg_data ||
+                   before(tp->urg_seq, tp->copied_seq) ||
+                   !before(tp->urg_seq, tp->rcv_nxt)) {
+
+                answ = tp->rcv_nxt - tp->copied_seq;
+
+                /* Subtract 1, if FIN was received */
+                if (answ && sock_flag(sk, SOCK_DONE))
+                        answ--;
+        } else {
+                answ = tp->urg_seq - tp->copied_seq;
+        }
+
+        return answ;
+}
+
+static inline void tcp_segs_in(struct tcp_sock *tp, const struct sk_buff *skb)
+{
+        u16 segs_in;
+
+        segs_in = max_t(u16, 1, skb_shinfo(skb)->gso_segs);
+        tp->segs_in += segs_in;
+        if (skb->len > tcp_hdrlen(skb))
+                tp->data_segs_in += segs_in;
+}
+
 #endif  /* _TCP_H */