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

Pull networking updates from David Miller:

 1) Significantly shrink the core networking routing structures. Result
    of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf

 2) Add netdevsim driver for testing various offloads, from Jakub
    Kicinski.

 3) Support cross-chip FDB operations in DSA, from Vivien Didelot.

 4) Add a 2nd listener hash table for TCP, similar to what was done for
    UDP. From Martin KaFai Lau.

 5) Add eBPF based queue selection to tun, from Jason Wang.

 6) Lockless qdisc support, from John Fastabend.

 7) SCTP stream interleave support, from Xin Long.

 8) Smoother TCP receive autotuning, from Eric Dumazet.

 9) Lots of erspan tunneling enhancements, from William Tu.

10) Add true function call support to BPF, from Alexei Starovoitov.

11) Add explicit support for GRO HW offloading, from Michael Chan.

12) Support extack generation in more netlink subsystems. From Alexander
    Aring, Quentin Monnet, and Jakub Kicinski.

13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
    Russell King.

14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.

15) Many improvements and simplifications to the NFP driver bpf JIT,
    from Jakub Kicinski.

16) Support for ipv6 non-equal cost multipath routing, from Ido
    Schimmel.

17) Add resource abstration to devlink, from Arkadi Sharshevsky.

18) Packet scheduler classifier shared filter block support, from Jiri
    Pirko.

19) Avoid locking in act_csum, from Davide Caratti.

20) devinet_ioctl() simplifications from Al viro.

21) More TCP bpf improvements from Lawrence Brakmo.

22) Add support for onlink ipv6 route flag, similar to ipv4, from David
    Ahern.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
  tls: Add support for encryption using async offload accelerator
  ip6mr: fix stale iterator
  net/sched: kconfig: Remove blank help texts
  openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
  tcp_nv: fix potential integer overflow in tcpnv_acked
  r8169: fix RTL8168EP take too long to complete driver initialization.
  qmi_wwan: Add support for Quectel EP06
  rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
  ipmr: Fix ptrdiff_t print formatting
  ibmvnic: Wait for device response when changing MAC
  qlcnic: fix deadlock bug
  tcp: release sk_frag.page in tcp_disconnect
  ipv4: Get the address of interface correctly.
  net_sched: gen_estimator: fix lockdep splat
  net: macb: Handle HRESP error
  net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
  ipv6: addrconf: break critical section in addrconf_verify_rtnl()
  ipv6: change route cache aging logic
  i40e/i40evf: Update DESC_NEEDED value to reflect larger value
  bnxt_en: cleanup DIM work on device shutdown
  ...

1 files changed, 49 insertions, 7 deletions

diff --git a/net/core/sock.c b/net/core/sock.c
index 1211159718ad..1033f8ab0547 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -145,6 +145,8 @@
 static DEFINE_MUTEX(proto_list_mutex);
 static LIST_HEAD(proto_list);
 
+static void sock_inuse_add(struct net *net, int val);
+
 /**
  * sk_ns_capable - General socket capability test
  * @sk: Socket to use a capability on or through
@@ -1531,8 +1533,11 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
 		sk->sk_kern_sock = kern;
 		sock_lock_init(sk);
 		sk->sk_net_refcnt = kern ? 0 : 1;
-		if (likely(sk->sk_net_refcnt))
+		if (likely(sk->sk_net_refcnt)) {
 			get_net(net);
+			sock_inuse_add(net, 1);
+		}
+
 		sock_net_set(sk, net);
 		refcount_set(&sk->sk_wmem_alloc, 1);
 
@@ -1595,6 +1600,9 @@ void sk_destruct(struct sock *sk)
 
 static void __sk_free(struct sock *sk)
 {
+	if (likely(sk->sk_net_refcnt))
+		sock_inuse_add(sock_net(sk), -1);
+
 	if (unlikely(sock_diag_has_destroy_listeners(sk) && sk->sk_net_refcnt))
 		sock_diag_broadcast_destroy(sk);
 	else
@@ -1716,6 +1724,8 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority)
 		newsk->sk_priority = 0;
 		newsk->sk_incoming_cpu = raw_smp_processor_id();
 		atomic64_set(&newsk->sk_cookie, 0);
+		if (likely(newsk->sk_net_refcnt))
+			sock_inuse_add(sock_net(newsk), 1);
 
 		/*
 		 * Before updating sk_refcnt, we must commit prior changes to memory
@@ -3045,7 +3055,7 @@ static DECLARE_BITMAP(proto_inuse_idx, PROTO_INUSE_NR);
 
 void sock_prot_inuse_add(struct net *net, struct proto *prot, int val)
 {
-	__this_cpu_add(net->core.inuse->val[prot->inuse_idx], val);
+	__this_cpu_add(net->core.prot_inuse->val[prot->inuse_idx], val);
 }
 EXPORT_SYMBOL_GPL(sock_prot_inuse_add);
 
@@ -3055,21 +3065,50 @@ int sock_prot_inuse_get(struct net *net, struct proto *prot)
 	int res = 0;
 
 	for_each_possible_cpu(cpu)
-		res += per_cpu_ptr(net->core.inuse, cpu)->val[idx];
+		res += per_cpu_ptr(net->core.prot_inuse, cpu)->val[idx];
 
 	return res >= 0 ? res : 0;
 }
 EXPORT_SYMBOL_GPL(sock_prot_inuse_get);
 
+static void sock_inuse_add(struct net *net, int val)
+{
+	this_cpu_add(*net->core.sock_inuse, val);
+}
+
+int sock_inuse_get(struct net *net)
+{
+	int cpu, res = 0;
+
+	for_each_possible_cpu(cpu)
+		res += *per_cpu_ptr(net->core.sock_inuse, cpu);
+
+	return res;
+}
+
+EXPORT_SYMBOL_GPL(sock_inuse_get);
+
 static int __net_init sock_inuse_init_net(struct net *net)
 {
-	net->core.inuse = alloc_percpu(struct prot_inuse);
-	return net->core.inuse ? 0 : -ENOMEM;
+	net->core.prot_inuse = alloc_percpu(struct prot_inuse);
+	if (net->core.prot_inuse == NULL)
+		return -ENOMEM;
+
+	net->core.sock_inuse = alloc_percpu(int);
+	if (net->core.sock_inuse == NULL)
+		goto out;
+
+	return 0;
+
+out:
+	free_percpu(net->core.prot_inuse);
+	return -ENOMEM;
 }
 
 static void __net_exit sock_inuse_exit_net(struct net *net)
 {
-	free_percpu(net->core.inuse);
+	free_percpu(net->core.prot_inuse);
+	free_percpu(net->core.sock_inuse);
 }
 
 static struct pernet_operations net_inuse_ops = {
@@ -3112,6 +3151,10 @@ static inline void assign_proto_idx(struct proto *prot)
 static inline void release_proto_idx(struct proto *prot)
 {
 }
+
+static void sock_inuse_add(struct net *net, int val)
+{
+}
 #endif
 
 static void req_prot_cleanup(struct request_sock_ops *rsk_prot)
@@ -3319,7 +3362,6 @@ static int proto_seq_open(struct inode *inode, struct file *file)
 }
 
 static const struct file_operations proto_seq_fops = {
-	.owner		= THIS_MODULE,
 	.open		= proto_seq_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,