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, 71 insertions, 230 deletions

diff --git a/net/socket.c b/net/socket.c
index 2f378449bc1bf..a93c99b518cab 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -163,12 +163,6 @@ static DEFINE_SPINLOCK(net_family_lock);
 static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly;
 
 /*
- *	Statistics counters of the socket lists
- */
-
-static DEFINE_PER_CPU(int, sockets_in_use);
-
-/*
  * Support routines.
  * Move socket addresses back and forth across the kernel/user
  * divide and look after the messy bits.
@@ -580,7 +574,6 @@ struct socket *sock_alloc(void)
 	inode->i_gid = current_fsgid();
 	inode->i_op = &sockfs_inode_ops;
 
-	this_cpu_add(sockets_in_use, 1);
 	return sock;
 }
 EXPORT_SYMBOL(sock_alloc);
@@ -607,7 +600,6 @@ void sock_release(struct socket *sock)
 	if (rcu_dereference_protected(sock->wq, 1)->fasync_list)
 		pr_err("%s: fasync list not empty!\n", __func__);
 
-	this_cpu_sub(sockets_in_use, 1);
 	if (!sock->file) {
 		iput(SOCK_INODE(sock));
 		return;
@@ -969,9 +961,28 @@ static long sock_do_ioctl(struct net *net, struct socket *sock,
 	 * If this ioctl is unknown try to hand it down
 	 * to the NIC driver.
 	 */
-	if (err == -ENOIOCTLCMD)
-		err = dev_ioctl(net, cmd, argp);
+	if (err != -ENOIOCTLCMD)
+		return err;
 
+	if (cmd == SIOCGIFCONF) {
+		struct ifconf ifc;
+		if (copy_from_user(&ifc, argp, sizeof(struct ifconf)))
+			return -EFAULT;
+		rtnl_lock();
+		err = dev_ifconf(net, &ifc, sizeof(struct ifreq));
+		rtnl_unlock();
+		if (!err && copy_to_user(argp, &ifc, sizeof(struct ifconf)))
+			err = -EFAULT;
+	} else {
+		struct ifreq ifr;
+		bool need_copyout;
+		if (copy_from_user(&ifr, argp, sizeof(struct ifreq)))
+			return -EFAULT;
+		err = dev_ioctl(net, cmd, &ifr, &need_copyout);
+		if (!err && need_copyout)
+			if (copy_to_user(argp, &ifr, sizeof(struct ifreq)))
+				return -EFAULT;
+	}
 	return err;
 }
 
@@ -996,12 +1007,19 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 	sock = file->private_data;
 	sk = sock->sk;
 	net = sock_net(sk);
-	if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
-		err = dev_ioctl(net, cmd, argp);
+	if (unlikely(cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))) {
+		struct ifreq ifr;
+		bool need_copyout;
+		if (copy_from_user(&ifr, argp, sizeof(struct ifreq)))
+			return -EFAULT;
+		err = dev_ioctl(net, cmd, &ifr, &need_copyout);
+		if (!err && need_copyout)
+			if (copy_to_user(argp, &ifr, sizeof(struct ifreq)))
+				return -EFAULT;
 	} else
 #ifdef CONFIG_WEXT_CORE
 	if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
-		err = dev_ioctl(net, cmd, argp);
+		err = wext_handle_ioctl(net, cmd, argp);
 	} else
 #endif
 		switch (cmd) {
@@ -2621,29 +2639,11 @@ out_fs:
 
 core_initcall(sock_init);	/* early initcall */
 
-static int __init jit_init(void)
-{
-#ifdef CONFIG_BPF_JIT_ALWAYS_ON
-	bpf_jit_enable = 1;
-#endif
-	return 0;
-}
-pure_initcall(jit_init);
-
 #ifdef CONFIG_PROC_FS
 void socket_seq_show(struct seq_file *seq)
 {
-	int cpu;
-	int counter = 0;
-
-	for_each_possible_cpu(cpu)
-	    counter += per_cpu(sockets_in_use, cpu);
-
-	/* It can be negative, by the way. 8) */
-	if (counter < 0)
-		counter = 0;
-
-	seq_printf(seq, "sockets: used %d\n", counter);
+	seq_printf(seq, "sockets: used %d\n",
+		   sock_inuse_get(seq->private));
 }
 #endif				/* CONFIG_PROC_FS */
 
@@ -2680,89 +2680,25 @@ static int do_siocgstampns(struct net *net, struct socket *sock,
 	return err;
 }
 
-static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32)
-{
-	struct ifreq __user *uifr;
-	int err;
-
-	uifr = compat_alloc_user_space(sizeof(struct ifreq));
-	if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
-		return -EFAULT;
-
-	err = dev_ioctl(net, SIOCGIFNAME, uifr);
-	if (err)
-		return err;
-
-	if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq)))
-		return -EFAULT;
-
-	return 0;
-}
-
-static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
+static int compat_dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
 {
 	struct compat_ifconf ifc32;
 	struct ifconf ifc;
-	struct ifconf __user *uifc;
-	struct compat_ifreq __user *ifr32;
-	struct ifreq __user *ifr;
-	unsigned int i, j;
 	int err;
 
 	if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf)))
 		return -EFAULT;
 
-	memset(&ifc, 0, sizeof(ifc));
-	if (ifc32.ifcbuf == 0) {
-		ifc32.ifc_len = 0;
-		ifc.ifc_len = 0;
-		ifc.ifc_req = NULL;
-		uifc = compat_alloc_user_space(sizeof(struct ifconf));
-	} else {
-		size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) *
-			sizeof(struct ifreq);
-		uifc = compat_alloc_user_space(sizeof(struct ifconf) + len);
-		ifc.ifc_len = len;
-		ifr = ifc.ifc_req = (void __user *)(uifc + 1);
-		ifr32 = compat_ptr(ifc32.ifcbuf);
-		for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) {
-			if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq)))
-				return -EFAULT;
-			ifr++;
-			ifr32++;
-		}
-	}
-	if (copy_to_user(uifc, &ifc, sizeof(struct ifconf)))
-		return -EFAULT;
+	ifc.ifc_len = ifc32.ifc_len;
+	ifc.ifc_req = compat_ptr(ifc32.ifcbuf);
 
-	err = dev_ioctl(net, SIOCGIFCONF, uifc);
+	rtnl_lock();
+	err = dev_ifconf(net, &ifc, sizeof(struct compat_ifreq));
+	rtnl_unlock();
 	if (err)
 		return err;
 
-	if (copy_from_user(&ifc, uifc, sizeof(struct ifconf)))
-		return -EFAULT;
-
-	ifr = ifc.ifc_req;
-	ifr32 = compat_ptr(ifc32.ifcbuf);
-	for (i = 0, j = 0;
-	     i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len;
-	     i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) {
-		if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq)))
-			return -EFAULT;
-		ifr32++;
-		ifr++;
-	}
-
-	if (ifc32.ifcbuf == 0) {
-		/* Translate from 64-bit structure multiple to
-		 * a 32-bit one.
-		 */
-		i = ifc.ifc_len;
-		i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq));
-		ifc32.ifc_len = i;
-	} else {
-		ifc32.ifc_len = i;
-	}
+	ifc32.ifc_len = ifc.ifc_len;
 	if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf)))
 		return -EFAULT;
 
@@ -2773,9 +2709,9 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
 {
 	struct compat_ethtool_rxnfc __user *compat_rxnfc;
 	bool convert_in = false, convert_out = false;
-	size_t buf_size = ALIGN(sizeof(struct ifreq), 8);
-	struct ethtool_rxnfc __user *rxnfc;
-	struct ifreq __user *ifr;
+	size_t buf_size = 0;
+	struct ethtool_rxnfc __user *rxnfc = NULL;
+	struct ifreq ifr;
 	u32 rule_cnt = 0, actual_rule_cnt;
 	u32 ethcmd;
 	u32 data;
@@ -2812,18 +2748,14 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
 	case ETHTOOL_SRXCLSRLDEL:
 		buf_size += sizeof(struct ethtool_rxnfc);
 		convert_in = true;
+		rxnfc = compat_alloc_user_space(buf_size);
 		break;
 	}
 
-	ifr = compat_alloc_user_space(buf_size);
-	rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8);
-
-	if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
+	if (copy_from_user(&ifr.ifr_name, &ifr32->ifr_name, IFNAMSIZ))
 		return -EFAULT;
 
-	if (put_user(convert_in ? rxnfc : compat_ptr(data),
-		     &ifr->ifr_ifru.ifru_data))
-		return -EFAULT;
+	ifr.ifr_data = convert_in ? rxnfc : (void __user *)compat_rxnfc;
 
 	if (convert_in) {
 		/* We expect there to be holes between fs.m_ext and
@@ -2851,7 +2783,7 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
 			return -EFAULT;
 	}
 
-	ret = dev_ioctl(net, SIOCETHTOOL, ifr);
+	ret = dev_ioctl(net, SIOCETHTOOL, &ifr, NULL);
 	if (ret)
 		return ret;
 
@@ -2892,113 +2824,43 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
 
 static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32)
 {
-	void __user *uptr;
 	compat_uptr_t uptr32;
-	struct ifreq __user *uifr;
+	struct ifreq ifr;
+	void __user *saved;
+	int err;
 
-	uifr = compat_alloc_user_space(sizeof(*uifr));
-	if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
+	if (copy_from_user(&ifr, uifr32, sizeof(struct compat_ifreq)))
 		return -EFAULT;
 
 	if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu))
 		return -EFAULT;
 
-	uptr = compat_ptr(uptr32);
-
-	if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc))
-		return -EFAULT;
-
-	return dev_ioctl(net, SIOCWANDEV, uifr);
-}
-
-static int bond_ioctl(struct net *net, unsigned int cmd,
-			 struct compat_ifreq __user *ifr32)
-{
-	struct ifreq kifr;
-	mm_segment_t old_fs;
-	int err;
+	saved = ifr.ifr_settings.ifs_ifsu.raw_hdlc;
+	ifr.ifr_settings.ifs_ifsu.raw_hdlc = compat_ptr(uptr32);
 
-	switch (cmd) {
-	case SIOCBONDENSLAVE:
-	case SIOCBONDRELEASE:
-	case SIOCBONDSETHWADDR:
-	case SIOCBONDCHANGEACTIVE:
-		if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq)))
-			return -EFAULT;
-
-		old_fs = get_fs();
-		set_fs(KERNEL_DS);
-		err = dev_ioctl(net, cmd,
-				(struct ifreq __user __force *) &kifr);
-		set_fs(old_fs);
-
-		return err;
-	default:
-		return -ENOIOCTLCMD;
+	err = dev_ioctl(net, SIOCWANDEV, &ifr, NULL);
+	if (!err) {
+		ifr.ifr_settings.ifs_ifsu.raw_hdlc = saved;
+		if (copy_to_user(uifr32, &ifr, sizeof(struct compat_ifreq)))
+			err = -EFAULT;
 	}
+	return err;
 }
 
 /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */
 static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd,
 				 struct compat_ifreq __user *u_ifreq32)
 {
-	struct ifreq __user *u_ifreq64;
-	char tmp_buf[IFNAMSIZ];
-	void __user *data64;
+	struct ifreq ifreq;
 	u32 data32;
 
-	if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]),
-			   IFNAMSIZ))
+	if (copy_from_user(ifreq.ifr_name, u_ifreq32->ifr_name, IFNAMSIZ))
 		return -EFAULT;
-	if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
+	if (get_user(data32, &u_ifreq32->ifr_data))
 		return -EFAULT;
-	data64 = compat_ptr(data32);
+	ifreq.ifr_data = compat_ptr(data32);
 
-	u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64));
-
-	if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0],
-			 IFNAMSIZ))
-		return -EFAULT;
-	if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
-		return -EFAULT;
-
-	return dev_ioctl(net, cmd, u_ifreq64);
-}
-
-static int dev_ifsioc(struct net *net, struct socket *sock,
-			 unsigned int cmd, struct compat_ifreq __user *uifr32)
-{
-	struct ifreq __user *uifr;
-	int err;
-
-	uifr = compat_alloc_user_space(sizeof(*uifr));
-	if (copy_in_user(uifr, uifr32, sizeof(*uifr32)))
-		return -EFAULT;
-
-	err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr);
-
-	if (!err) {
-		switch (cmd) {
-		case SIOCGIFFLAGS:
-		case SIOCGIFMETRIC:
-		case SIOCGIFMTU:
-		case SIOCGIFMEM:
-		case SIOCGIFHWADDR:
-		case SIOCGIFINDEX:
-		case SIOCGIFADDR:
-		case SIOCGIFBRDADDR:
-		case SIOCGIFDSTADDR:
-		case SIOCGIFNETMASK:
-		case SIOCGIFPFLAGS:
-		case SIOCGIFTXQLEN:
-		case SIOCGMIIPHY:
-		case SIOCGMIIREG:
-			if (copy_in_user(uifr32, uifr, sizeof(*uifr32)))
-				err = -EFAULT;
-			break;
-		}
-	}
-	return err;
+	return dev_ioctl(net, cmd, &ifreq, NULL);
 }
 
 static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
@@ -3006,7 +2868,6 @@ static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
 {
 	struct ifreq ifr;
 	struct compat_ifmap __user *uifmap32;
-	mm_segment_t old_fs;
 	int err;
 
 	uifmap32 = &uifr32->ifr_ifru.ifru_map;
@@ -3020,10 +2881,7 @@ static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
 	if (err)
 		return -EFAULT;
 
-	old_fs = get_fs();
-	set_fs(KERNEL_DS);
-	err = dev_ioctl(net, cmd, (void  __user __force *)&ifr);
-	set_fs(old_fs);
+	err = dev_ioctl(net, cmd, &ifr, NULL);
 
 	if (cmd == SIOCGIFMAP && !err) {
 		err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name));
@@ -3156,10 +3014,8 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
 	case SIOCSIFBR:
 	case SIOCGIFBR:
 		return old_bridge_ioctl(argp);
-	case SIOCGIFNAME:
-		return dev_ifname32(net, argp);
 	case SIOCGIFCONF:
-		return dev_ifconf(net, argp);
+		return compat_dev_ifconf(net, argp);
 	case SIOCETHTOOL:
 		return ethtool_ioctl(net, argp);
 	case SIOCWANDEV:
@@ -3167,11 +3023,6 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
 	case SIOCGIFMAP:
 	case SIOCSIFMAP:
 		return compat_sioc_ifmap(net, cmd, argp);
-	case SIOCBONDENSLAVE:
-	case SIOCBONDRELEASE:
-	case SIOCBONDSETHWADDR:
-	case SIOCBONDCHANGEACTIVE:
-		return bond_ioctl(net, cmd, argp);
 	case SIOCADDRT:
 	case SIOCDELRT:
 		return routing_ioctl(net, sock, cmd, argp);
@@ -3231,12 +3082,15 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
 	case SIOCGMIIPHY:
 	case SIOCGMIIREG:
 	case SIOCSMIIREG:
-		return dev_ifsioc(net, sock, cmd, argp);
-
 	case SIOCSARP:
 	case SIOCGARP:
 	case SIOCDARP:
 	case SIOCATMARK:
+	case SIOCBONDENSLAVE:
+	case SIOCBONDRELEASE:
+	case SIOCBONDSETHWADDR:
+	case SIOCBONDCHANGEACTIVE:
+	case SIOCGIFNAME:
 		return sock_do_ioctl(net, sock, cmd, arg);
 	}
 
@@ -3391,19 +3245,6 @@ int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset,
 }
 EXPORT_SYMBOL(kernel_sendpage_locked);
 
-int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg)
-{
-	mm_segment_t oldfs = get_fs();
-	int err;
-
-	set_fs(KERNEL_DS);
-	err = sock->ops->ioctl(sock, cmd, arg);
-	set_fs(oldfs);
-
-	return err;
-}
-EXPORT_SYMBOL(kernel_sock_ioctl);
-
 int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how)
 {
 	return sock->ops->shutdown(sock, how);