Merge branch 'x86/urgent' into core/signal

Conflicts:
	arch/x86/kernel/signal_64.c

10 files changed, 3021 insertions, 0 deletions

diff --git a/net/phonet/Kconfig b/net/phonet/Kconfig
new file mode 100644
index 00000000000..51a5669573f
--- /dev/null
+++ b/net/phonet/Kconfig
@@ -0,0 +1,16 @@
+#
+# Phonet protocol
+#
+
+config PHONET
+	tristate "Phonet protocols family"
+	help
+	  The Phone Network protocol (PhoNet) is a packet-oriented
+	  communication protocol developped by Nokia for use with its modems.
+
+	  This is required for Maemo to use cellular data connectivity (if
+	  supported). It can also be used to control Nokia phones
+	  from a Linux computer, although AT commands may be easier to use.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called phonet. If unsure, say N.
diff --git a/net/phonet/Makefile b/net/phonet/Makefile
new file mode 100644
index 00000000000..d62bbba649b
--- /dev/null
+++ b/net/phonet/Makefile
@@ -0,0 +1,11 @@
+obj-$(CONFIG_PHONET) += phonet.o pn_pep.o
+
+phonet-objs := \
+	pn_dev.o \
+	pn_netlink.o \
+	socket.o \
+	datagram.o \
+	sysctl.o \
+	af_phonet.o
+
+pn_pep-objs := pep.o pep-gprs.o
diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c
new file mode 100644
index 00000000000..9e9c6fce11a
--- /dev/null
+++ b/net/phonet/af_phonet.c
@@ -0,0 +1,477 @@
+/*
+ * File: af_phonet.c
+ *
+ * Phonet protocols family
+ *
+ * Copyright (C) 2008 Nokia Corporation.
+ *
+ * Contact: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
+ * Original author: Sakari Ailus <sakari.ailus@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <asm/unaligned.h>
+#include <net/sock.h>
+
+#include <linux/if_phonet.h>
+#include <linux/phonet.h>
+#include <net/phonet/phonet.h>
+#include <net/phonet/pn_dev.h>
+
+static struct net_proto_family phonet_proto_family;
+static struct phonet_protocol *phonet_proto_get(int protocol);
+static inline void phonet_proto_put(struct phonet_protocol *pp);
+
+/* protocol family functions */
+
+static int pn_socket_create(struct net *net, struct socket *sock, int protocol)
+{
+	struct sock *sk;
+	struct pn_sock *pn;
+	struct phonet_protocol *pnp;
+	int err;
+
+	if (net != &init_net)
+		return -EAFNOSUPPORT;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (protocol == 0) {
+		/* Default protocol selection */
+		switch (sock->type) {
+		case SOCK_DGRAM:
+			protocol = PN_PROTO_PHONET;
+			break;
+		case SOCK_SEQPACKET:
+			protocol = PN_PROTO_PIPE;
+			break;
+		default:
+			return -EPROTONOSUPPORT;
+		}
+	}
+
+	pnp = phonet_proto_get(protocol);
+#ifdef CONFIG_KMOD
+	if (pnp == NULL &&
+	    request_module("net-pf-%d-proto-%d", PF_PHONET, protocol) == 0)
+		pnp = phonet_proto_get(protocol);
+#endif
+	if (pnp == NULL)
+		return -EPROTONOSUPPORT;
+	if (sock->type != pnp->sock_type) {
+		err = -EPROTONOSUPPORT;
+		goto out;
+	}
+
+	sk = sk_alloc(net, PF_PHONET, GFP_KERNEL, pnp->prot);
+	if (sk == NULL) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	sock_init_data(sock, sk);
+	sock->state = SS_UNCONNECTED;
+	sock->ops = pnp->ops;
+	sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
+	sk->sk_protocol = protocol;
+	pn = pn_sk(sk);
+	pn->sobject = 0;
+	pn->resource = 0;
+	sk->sk_prot->init(sk);
+	err = 0;
+
+out:
+	phonet_proto_put(pnp);
+	return err;
+}
+
+static struct net_proto_family phonet_proto_family = {
+	.family = PF_PHONET,
+	.create = pn_socket_create,
+	.owner = THIS_MODULE,
+};
+
+/* Phonet device header operations */
+static int pn_header_create(struct sk_buff *skb, struct net_device *dev,
+				unsigned short type, const void *daddr,
+				const void *saddr, unsigned len)
+{
+	u8 *media = skb_push(skb, 1);
+
+	if (type != ETH_P_PHONET)
+		return -1;
+
+	if (!saddr)
+		saddr = dev->dev_addr;
+	*media = *(const u8 *)saddr;
+	return 1;
+}
+
+static int pn_header_parse(const struct sk_buff *skb, unsigned char *haddr)
+{
+	const u8 *media = skb_mac_header(skb);
+	*haddr = *media;
+	return 1;
+}
+
+struct header_ops phonet_header_ops = {
+	.create = pn_header_create,
+	.parse = pn_header_parse,
+};
+EXPORT_SYMBOL(phonet_header_ops);
+
+/*
+ * Prepends an ISI header and sends a datagram.
+ */
+static int pn_send(struct sk_buff *skb, struct net_device *dev,
+			u16 dst, u16 src, u8 res, u8 irq)
+{
+	struct phonethdr *ph;
+	int err;
+
+	if (skb->len + 2 > 0xffff) {
+		/* Phonet length field would overflow */
+		err = -EMSGSIZE;
+		goto drop;
+	}
+
+	skb_reset_transport_header(skb);
+	WARN_ON(skb_headroom(skb) & 1); /* HW assumes word alignment */
+	skb_push(skb, sizeof(struct phonethdr));
+	skb_reset_network_header(skb);
+	ph = pn_hdr(skb);
+	ph->pn_rdev = pn_dev(dst);
+	ph->pn_sdev = pn_dev(src);
+	ph->pn_res = res;
+	ph->pn_length = __cpu_to_be16(skb->len + 2 - sizeof(*ph));
+	ph->pn_robj = pn_obj(dst);
+	ph->pn_sobj = pn_obj(src);
+
+	skb->protocol = htons(ETH_P_PHONET);
+	skb->priority = 0;
+	skb->dev = dev;
+
+	if (pn_addr(src) == pn_addr(dst)) {
+		skb_reset_mac_header(skb);
+		skb->pkt_type = PACKET_LOOPBACK;
+		skb_orphan(skb);
+		if (irq)
+			netif_rx(skb);
+		else
+			netif_rx_ni(skb);
+		err = 0;
+	} else {
+		err = dev_hard_header(skb, dev, ntohs(skb->protocol),
+					NULL, NULL, skb->len);
+		if (err < 0) {
+			err = -EHOSTUNREACH;
+			goto drop;
+		}
+		err = dev_queue_xmit(skb);
+	}
+
+	return err;
+drop:
+	kfree_skb(skb);
+	return err;
+}
+
+static int pn_raw_send(const void *data, int len, struct net_device *dev,
+			u16 dst, u16 src, u8 res)
+{
+	struct sk_buff *skb = alloc_skb(MAX_PHONET_HEADER + len, GFP_ATOMIC);
+	if (skb == NULL)
+		return -ENOMEM;
+
+	skb_reserve(skb, MAX_PHONET_HEADER);
+	__skb_put(skb, len);
+	skb_copy_to_linear_data(skb, data, len);
+	return pn_send(skb, dev, dst, src, res, 1);
+}
+
+/*
+ * Create a Phonet header for the skb and send it out. Returns
+ * non-zero error code if failed. The skb is freed then.
+ */
+int pn_skb_send(struct sock *sk, struct sk_buff *skb,
+		const struct sockaddr_pn *target)
+{
+	struct net_device *dev;
+	struct pn_sock *pn = pn_sk(sk);
+	int err;
+	u16 src;
+	u8 daddr = pn_sockaddr_get_addr(target), saddr = PN_NO_ADDR;
+
+	err = -EHOSTUNREACH;
+	if (sk->sk_bound_dev_if)
+		dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
+	else
+		dev = phonet_device_get(sock_net(sk));
+	if (!dev || !(dev->flags & IFF_UP))
+		goto drop;
+
+	saddr = phonet_address_get(dev, daddr);
+	if (saddr == PN_NO_ADDR)
+		goto drop;
+
+	src = pn->sobject;
+	if (!pn_addr(src))
+		src = pn_object(saddr, pn_obj(src));
+
+	err = pn_send(skb, dev, pn_sockaddr_get_object(target),
+			src, pn_sockaddr_get_resource(target), 0);
+	dev_put(dev);
+	return err;
+
+drop:
+	kfree_skb(skb);
+	if (dev)
+		dev_put(dev);
+	return err;
+}
+EXPORT_SYMBOL(pn_skb_send);
+
+/* Do not send an error message in response to an error message */
+static inline int can_respond(struct sk_buff *skb)
+{
+	const struct phonethdr *ph;
+	const struct phonetmsg *pm;
+	u8 submsg_id;
+
+	if (!pskb_may_pull(skb, 3))
+		return 0;
+
+	ph = pn_hdr(skb);
+	if (phonet_address_get(skb->dev, ph->pn_rdev) != ph->pn_rdev)
+		return 0; /* we are not the destination */
+	if (ph->pn_res == PN_PREFIX && !pskb_may_pull(skb, 5))
+		return 0;
+
+	ph = pn_hdr(skb); /* re-acquires the pointer */
+	pm = pn_msg(skb);
+	if (pm->pn_msg_id != PN_COMMON_MESSAGE)
+		return 1;
+	submsg_id = (ph->pn_res == PN_PREFIX)
+		? pm->pn_e_submsg_id : pm->pn_submsg_id;
+	if (submsg_id != PN_COMM_ISA_ENTITY_NOT_REACHABLE_RESP &&
+		pm->pn_e_submsg_id != PN_COMM_SERVICE_NOT_IDENTIFIED_RESP)
+		return 1;
+	return 0;
+}
+
+static int send_obj_unreachable(struct sk_buff *rskb)
+{
+	const struct phonethdr *oph = pn_hdr(rskb);
+	const struct phonetmsg *opm = pn_msg(rskb);
+	struct phonetmsg resp;
+
+	memset(&resp, 0, sizeof(resp));
+	resp.pn_trans_id = opm->pn_trans_id;
+	resp.pn_msg_id = PN_COMMON_MESSAGE;
+	if (oph->pn_res == PN_PREFIX) {
+		resp.pn_e_res_id = opm->pn_e_res_id;
+		resp.pn_e_submsg_id = PN_COMM_ISA_ENTITY_NOT_REACHABLE_RESP;
+		resp.pn_e_orig_msg_id = opm->pn_msg_id;
+		resp.pn_e_status = 0;
+	} else {
+		resp.pn_submsg_id = PN_COMM_ISA_ENTITY_NOT_REACHABLE_RESP;
+		resp.pn_orig_msg_id = opm->pn_msg_id;
+		resp.pn_status = 0;
+	}
+	return pn_raw_send(&resp, sizeof(resp), rskb->dev,
+				pn_object(oph->pn_sdev, oph->pn_sobj),
+				pn_object(oph->pn_rdev, oph->pn_robj),
+				oph->pn_res);
+}
+
+static int send_reset_indications(struct sk_buff *rskb)
+{
+	struct phonethdr *oph = pn_hdr(rskb);
+	static const u8 data[4] = {
+		0x00 /* trans ID */, 0x10 /* subscribe msg */,
+		0x00 /* subscription count */, 0x00 /* dummy */
+	};
+
+	return pn_raw_send(data, sizeof(data), rskb->dev,
+				pn_object(oph->pn_sdev, 0x00),
+				pn_object(oph->pn_rdev, oph->pn_robj), 0x10);
+}
+
+
+/* packet type functions */
+
+/*
+ * Stuff received packets to associated sockets.
+ * On error, returns non-zero and releases the skb.
+ */
+static int phonet_rcv(struct sk_buff *skb, struct net_device *dev,
+			struct packet_type *pkttype,
+			struct net_device *orig_dev)
+{
+	struct phonethdr *ph;
+	struct sock *sk;
+	struct sockaddr_pn sa;
+	u16 len;
+
+	if (dev_net(dev) != &init_net)
+		goto out;
+
+	/* check we have at least a full Phonet header */
+	if (!pskb_pull(skb, sizeof(struct phonethdr)))
+		goto out;
+
+	/* check that the advertised length is correct */
+	ph = pn_hdr(skb);
+	len = get_unaligned_be16(&ph->pn_length);
+	if (len < 2)
+		goto out;
+	len -= 2;
+	if ((len > skb->len) || pskb_trim(skb, len))
+		goto out;
+	skb_reset_transport_header(skb);
+
+	pn_skb_get_dst_sockaddr(skb, &sa);
+	if (pn_sockaddr_get_addr(&sa) == 0)
+		goto out; /* currently, we cannot be device 0 */
+
+	sk = pn_find_sock_by_sa(&sa);
+	if (sk == NULL) {
+		if (can_respond(skb)) {
+			send_obj_unreachable(skb);
+			send_reset_indications(skb);
+		}
+		goto out;
+	}
+
+	/* Push data to the socket (or other sockets connected to it). */
+	return sk_receive_skb(sk, skb, 0);
+
+out:
+	kfree_skb(skb);
+	return NET_RX_DROP;
+}
+
+static struct packet_type phonet_packet_type = {
+	.type = __constant_htons(ETH_P_PHONET),
+	.dev = NULL,
+	.func = phonet_rcv,
+};
+
+/* Transport protocol registration */
+static struct phonet_protocol *proto_tab[PHONET_NPROTO] __read_mostly;
+static DEFINE_SPINLOCK(proto_tab_lock);
+
+int __init_or_module phonet_proto_register(int protocol,
+						struct phonet_protocol *pp)
+{
+	int err = 0;
+
+	if (protocol >= PHONET_NPROTO)
+		return -EINVAL;
+
+	err = proto_register(pp->prot, 1);
+	if (err)
+		return err;
+
+	spin_lock(&proto_tab_lock);
+	if (proto_tab[protocol])
+		err = -EBUSY;
+	else
+		proto_tab[protocol] = pp;
+	spin_unlock(&proto_tab_lock);
+
+	return err;
+}
+EXPORT_SYMBOL(phonet_proto_register);
+
+void phonet_proto_unregister(int protocol, struct phonet_protocol *pp)
+{
+	spin_lock(&proto_tab_lock);
+	BUG_ON(proto_tab[protocol] != pp);
+	proto_tab[protocol] = NULL;
+	spin_unlock(&proto_tab_lock);
+	proto_unregister(pp->prot);
+}
+EXPORT_SYMBOL(phonet_proto_unregister);
+
+static struct phonet_protocol *phonet_proto_get(int protocol)
+{
+	struct phonet_protocol *pp;
+
+	if (protocol >= PHONET_NPROTO)
+		return NULL;
+
+	spin_lock(&proto_tab_lock);
+	pp = proto_tab[protocol];
+	if (pp && !try_module_get(pp->prot->owner))
+		pp = NULL;
+	spin_unlock(&proto_tab_lock);
+
+	return pp;
+}
+
+static inline void phonet_proto_put(struct phonet_protocol *pp)
+{
+	module_put(pp->prot->owner);
+}
+
+/* Module registration */
+static int __init phonet_init(void)
+{
+	int err;
+
+	err = sock_register(&phonet_proto_family);
+	if (err) {
+		printk(KERN_ALERT
+			"phonet protocol family initialization failed\n");
+		return err;
+	}
+
+	phonet_device_init();
+	dev_add_pack(&phonet_packet_type);
+	phonet_netlink_register();
+	phonet_sysctl_init();
+
+	err = isi_register();
+	if (err)
+		goto err;
+	return 0;
+
+err:
+	phonet_sysctl_exit();
+	sock_unregister(PF_PHONET);
+	dev_remove_pack(&phonet_packet_type);
+	phonet_device_exit();
+	return err;
+}
+
+static void __exit phonet_exit(void)
+{
+	isi_unregister();
+	phonet_sysctl_exit();
+	sock_unregister(PF_PHONET);
+	dev_remove_pack(&phonet_packet_type);
+	phonet_device_exit();
+}
+
+module_init(phonet_init);
+module_exit(phonet_exit);
+MODULE_DESCRIPTION("Phonet protocol stack for Linux");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NETPROTO(PF_PHONET);
diff --git a/net/phonet/datagram.c b/net/phonet/datagram.c
new file mode 100644
index 00000000000..e087862ed7e
--- /dev/null
+++ b/net/phonet/datagram.c
@@ -0,0 +1,197 @@
+/*
+ * File: datagram.c
+ *
+ * Datagram (ISI) Phonet sockets
+ *
+ * Copyright (C) 2008 Nokia Corporation.
+ *
+ * Contact: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
+ * Original author: Sakari Ailus <sakari.ailus@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/socket.h>
+#include <asm/ioctls.h>
+#include <net/sock.h>
+
+#include <linux/phonet.h>
+#include <net/phonet/phonet.h>
+
+static int pn_backlog_rcv(struct sock *sk, struct sk_buff *skb);
+
+/* associated socket ceases to exist */
+static void pn_sock_close(struct sock *sk, long timeout)
+{
+	sk_common_release(sk);
+}
+
+static int pn_ioctl(struct sock *sk, int cmd, unsigned long arg)
+{
+	struct sk_buff *skb;
+	int answ;
+
+	switch (cmd) {
+	case SIOCINQ:
+		lock_sock(sk);
+		skb = skb_peek(&sk->sk_receive_queue);
+		answ = skb ? skb->len : 0;
+		release_sock(sk);
+		return put_user(answ, (int __user *)arg);
+	}
+
+	return -ENOIOCTLCMD;
+}
+
+/* Destroy socket. All references are gone. */
+static void pn_destruct(struct sock *sk)
+{
+	skb_queue_purge(&sk->sk_receive_queue);
+}
+
+static int pn_init(struct sock *sk)
+{
+	sk->sk_destruct = pn_destruct;
+	return 0;
+}
+
+static int pn_sendmsg(struct kiocb *iocb, struct sock *sk,
+			struct msghdr *msg, size_t len)
+{
+	struct sockaddr_pn *target;
+	struct sk_buff *skb;
+	int err;
+
+	if (msg->msg_flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	if (msg->msg_name == NULL)
+		return -EDESTADDRREQ;
+
+	if (msg->msg_namelen < sizeof(struct sockaddr_pn))
+		return -EINVAL;
+
+	target = (struct sockaddr_pn *)msg->msg_name;
+	if (target->spn_family != AF_PHONET)
+		return -EAFNOSUPPORT;
+
+	skb = sock_alloc_send_skb(sk, MAX_PHONET_HEADER + len,
+					msg->msg_flags & MSG_DONTWAIT, &err);
+	if (skb == NULL)
+		return err;
+	skb_reserve(skb, MAX_PHONET_HEADER);
+
+	err = memcpy_fromiovec((void *)skb_put(skb, len), msg->msg_iov, len);
+	if (err < 0) {
+		kfree_skb(skb);
+		return err;
+	}
+
+	/*
+	 * Fill in the Phonet header and
+	 * finally pass the packet forwards.
+	 */
+	err = pn_skb_send(sk, skb, target);
+
+	/* If ok, return len. */
+	return (err >= 0) ? len : err;
+}
+
+static int pn_recvmsg(struct kiocb *iocb, struct sock *sk,
+			struct msghdr *msg, size_t len, int noblock,
+			int flags, int *addr_len)
+{
+	struct sk_buff *skb = NULL;
+	struct sockaddr_pn sa;
+	int rval = -EOPNOTSUPP;
+	int copylen;
+
+	if (flags & MSG_OOB)
+		goto out_nofree;
+
+	if (addr_len)
+		*addr_len = sizeof(sa);
+
+	skb = skb_recv_datagram(sk, flags, noblock, &rval);
+	if (skb == NULL)
+		goto out_nofree;
+
+	pn_skb_get_src_sockaddr(skb, &sa);
+
+	copylen = skb->len;
+	if (len < copylen) {
+		msg->msg_flags |= MSG_TRUNC;
+		copylen = len;
+	}
+
+	rval = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copylen);
+	if (rval) {
+		rval = -EFAULT;
+		goto out;
+	}
+
+	rval = (flags & MSG_TRUNC) ? skb->len : copylen;
+
+	if (msg->msg_name != NULL)
+		memcpy(msg->msg_name, &sa, sizeof(struct sockaddr_pn));
+
+out:
+	skb_free_datagram(sk, skb);
+
+out_nofree:
+	return rval;
+}
+
+/* Queue an skb for a sock. */
+static int pn_backlog_rcv(struct sock *sk, struct sk_buff *skb)
+{
+	int err = sock_queue_rcv_skb(sk, skb);
+	if (err < 0)
+		kfree_skb(skb);
+	return err ? NET_RX_DROP : NET_RX_SUCCESS;
+}
+
+/* Module registration */
+static struct proto pn_proto = {
+	.close		= pn_sock_close,
+	.ioctl		= pn_ioctl,
+	.init		= pn_init,
+	.sendmsg	= pn_sendmsg,
+	.recvmsg	= pn_recvmsg,
+	.backlog_rcv	= pn_backlog_rcv,
+	.hash		= pn_sock_hash,
+	.unhash		= pn_sock_unhash,
+	.get_port	= pn_sock_get_port,
+	.obj_size	= sizeof(struct pn_sock),
+	.owner		= THIS_MODULE,
+	.name		= "PHONET",
+};
+
+static struct phonet_protocol pn_dgram_proto = {
+	.ops		= &phonet_dgram_ops,
+	.prot		= &pn_proto,
+	.sock_type	= SOCK_DGRAM,
+};
+
+int __init isi_register(void)
+{
+	return phonet_proto_register(PN_PROTO_PHONET, &pn_dgram_proto);
+}
+
+void __exit isi_unregister(void)
+{
+	phonet_proto_unregister(PN_PROTO_PHONET, &pn_dgram_proto);
+}
diff --git a/net/phonet/pep-gprs.c b/net/phonet/pep-gprs.c
new file mode 100644
index 00000000000..9978afbd9f2
--- /dev/null
+++ b/net/phonet/pep-gprs.c
@@ -0,0 +1,347 @@
+/*
+ * File: pep-gprs.c
+ *
+ * GPRS over Phonet pipe end point socket
+ *
+ * Copyright (C) 2008 Nokia Corporation.
+ *
+ * Author: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/if_ether.h>
+#include <linux/if_arp.h>
+#include <net/sock.h>
+
+#include <linux/if_phonet.h>
+#include <net/tcp_states.h>
+#include <net/phonet/gprs.h>
+
+#define GPRS_DEFAULT_MTU 1400
+
+struct gprs_dev {
+	struct sock		*sk;
+	void			(*old_state_change)(struct sock *);
+	void			(*old_data_ready)(struct sock *, int);
+	void			(*old_write_space)(struct sock *);
+
+	struct net_device	*net;
+	struct net_device_stats	stats;
+
+	struct sk_buff_head	tx_queue;
+	struct work_struct	tx_work;
+	spinlock_t		tx_lock;
+	unsigned		tx_max;
+};
+
+static int gprs_type_trans(struct sk_buff *skb)
+{
+	const u8 *pvfc;
+	u8 buf;
+
+	pvfc = skb_header_pointer(skb, 0, 1, &buf);
+	if (!pvfc)
+		return 0;
+	/* Look at IP version field */
+	switch (*pvfc >> 4) {
+	case 4:
+		return htons(ETH_P_IP);
+	case 6:
+		return htons(ETH_P_IPV6);
+	}
+	return 0;
+}
+
+/*
+ * Socket callbacks
+ */
+
+static void gprs_state_change(struct sock *sk)
+{
+	struct gprs_dev *dev = sk->sk_user_data;
+
+	if (sk->sk_state == TCP_CLOSE_WAIT) {
+		netif_stop_queue(dev->net);
+		netif_carrier_off(dev->net);
+	}
+}
+
+static int gprs_recv(struct gprs_dev *dev, struct sk_buff *skb)
+{
+	int err = 0;
+	u16 protocol = gprs_type_trans(skb);
+
+	if (!protocol) {
+		err = -EINVAL;
+		goto drop;
+	}
+
+	if (likely(skb_headroom(skb) & 3)) {
+		struct sk_buff *rskb, *fs;
+		int flen = 0;
+
+		/* Phonet Pipe data header is misaligned (3 bytes),
+		 * so wrap the IP packet as a single fragment of an head-less
+		 * socket buffer. The network stack will pull what it needs,
+		 * but at least, the whole IP payload is not memcpy'd. */
+		rskb = netdev_alloc_skb(dev->net, 0);
+		if (!rskb) {
+			err = -ENOBUFS;
+			goto drop;
+		}
+		skb_shinfo(rskb)->frag_list = skb;
+		rskb->len += skb->len;
+		rskb->data_len += rskb->len;
+		rskb->truesize += rskb->len;
+
+		/* Avoid nested fragments */
+		for (fs = skb_shinfo(skb)->frag_list; fs; fs = fs->next)
+			flen += fs->len;
+		skb->next = skb_shinfo(skb)->frag_list;
+		skb_shinfo(skb)->frag_list = NULL;
+		skb->len -= flen;
+		skb->data_len -= flen;
+		skb->truesize -= flen;
+
+		skb = rskb;
+	}
+
+	skb->protocol = protocol;
+	skb_reset_mac_header(skb);
+	skb->dev = dev->net;
+
+	if (likely(dev->net->flags & IFF_UP)) {
+		dev->stats.rx_packets++;
+		dev->stats.rx_bytes += skb->len;
+		netif_rx(skb);
+		skb = NULL;
+	} else
+		err = -ENODEV;
+
+drop:
+	if (skb) {
+		dev_kfree_skb(skb);
+		dev->stats.rx_dropped++;
+	}
+	return err;
+}
+
+static void gprs_data_ready(struct sock *sk, int len)
+{
+	struct gprs_dev *dev = sk->sk_user_data;
+	struct sk_buff *skb;
+
+	while ((skb = pep_read(sk)) != NULL) {
+		skb_orphan(skb);
+		gprs_recv(dev, skb);
+	}
+}
+
+static void gprs_write_space(struct sock *sk)
+{
+	struct gprs_dev *dev = sk->sk_user_data;
+	unsigned credits = pep_writeable(sk);
+
+	spin_lock_bh(&dev->tx_lock);
+	dev->tx_max = credits;
+	if (credits > skb_queue_len(&dev->tx_queue))
+		netif_wake_queue(dev->net);
+	spin_unlock_bh(&dev->tx_lock);
+}
+
+/*
+ * Network device callbacks
+ */
+
+static int gprs_xmit(struct sk_buff *skb, struct net_device *net)
+{
+	struct gprs_dev *dev = netdev_priv(net);
+
+	switch (skb->protocol) {
+	case  htons(ETH_P_IP):
+	case  htons(ETH_P_IPV6):
+		break;
+	default:
+		dev_kfree_skb(skb);
+		return 0;
+	}
+
+	spin_lock(&dev->tx_lock);
+	if (likely(skb_queue_len(&dev->tx_queue) < dev->tx_max)) {
+		skb_queue_tail(&dev->tx_queue, skb);
+		skb = NULL;
+	}
+	if (skb_queue_len(&dev->tx_queue) >= dev->tx_max)
+		netif_stop_queue(net);
+	spin_unlock(&dev->tx_lock);
+
+	schedule_work(&dev->tx_work);
+	if (unlikely(skb))
+		dev_kfree_skb(skb);
+	return 0;
+}
+
+static void gprs_tx(struct work_struct *work)
+{
+	struct gprs_dev *dev = container_of(work, struct gprs_dev, tx_work);
+	struct sock *sk = dev->sk;
+	struct sk_buff *skb;
+
+	while ((skb = skb_dequeue(&dev->tx_queue)) != NULL) {
+		int err;
+
+		dev->stats.tx_bytes += skb->len;
+		dev->stats.tx_packets++;
+
+		skb_orphan(skb);
+		skb_set_owner_w(skb, sk);
+
+		lock_sock(sk);
+		err = pep_write(sk, skb);
+		if (err) {
+			LIMIT_NETDEBUG(KERN_WARNING"%s: TX error (%d)\n",
+					dev->net->name, err);
+			dev->stats.tx_aborted_errors++;
+			dev->stats.tx_errors++;
+		}
+		release_sock(sk);
+	}
+
+	lock_sock(sk);
+	gprs_write_space(sk);
+	release_sock(sk);
+}
+
+static int gprs_set_mtu(struct net_device *net, int new_mtu)
+{
+	if ((new_mtu < 576) || (new_mtu > (PHONET_MAX_MTU - 11)))
+		return -EINVAL;
+
+	net->mtu = new_mtu;
+	return 0;
+}
+
+static struct net_device_stats *gprs_get_stats(struct net_device *net)
+{
+	struct gprs_dev *dev = netdev_priv(net);
+
+	return &dev->stats;
+}
+
+static void gprs_setup(struct net_device *net)
+{
+	net->features		= NETIF_F_FRAGLIST;
+	net->type		= ARPHRD_NONE;
+	net->flags		= IFF_POINTOPOINT | IFF_NOARP;
+	net->mtu		= GPRS_DEFAULT_MTU;
+	net->hard_header_len	= 0;
+	net->addr_len		= 0;
+	net->tx_queue_len	= 10;
+
+	net->destructor		= free_netdev;
+	net->hard_start_xmit	= gprs_xmit; /* mandatory */
+	net->change_mtu		= gprs_set_mtu;
+	net->get_stats		= gprs_get_stats;
+}
+
+/*
+ * External interface
+ */
+
+/*
+ * Attach a GPRS interface to a datagram socket.
+ * Returns the interface index on success, negative error code on error.
+ */
+int gprs_attach(struct sock *sk)
+{
+	static const char ifname[] = "gprs%d";
+	struct gprs_dev *dev;
+	struct net_device *net;
+	int err;
+
+	if (unlikely(sk->sk_type == SOCK_STREAM))
+		return -EINVAL; /* need packet boundaries */
+
+	/* Create net device */
+	net = alloc_netdev(sizeof(*dev), ifname, gprs_setup);
+	if (!net)
+		return -ENOMEM;
+	dev = netdev_priv(net);
+	dev->net = net;
+	dev->tx_max = 0;
+	spin_lock_init(&dev->tx_lock);
+	skb_queue_head_init(&dev->tx_queue);
+	INIT_WORK(&dev->tx_work, gprs_tx);
+
+	netif_stop_queue(net);
+	err = register_netdev(net);
+	if (err) {
+		free_netdev(net);
+		return err;
+	}
+
+	lock_sock(sk);
+	if (unlikely(sk->sk_user_data)) {
+		err = -EBUSY;
+		goto out_rel;
+	}
+	if (unlikely((1 << sk->sk_state & (TCPF_CLOSE|TCPF_LISTEN)) ||
+			sock_flag(sk, SOCK_DEAD))) {
+		err = -EINVAL;
+		goto out_rel;
+	}
+	sk->sk_user_data	= dev;
+	dev->old_state_change	= sk->sk_state_change;
+	dev->old_data_ready	= sk->sk_data_ready;
+	dev->old_write_space	= sk->sk_write_space;
+	sk->sk_state_change	= gprs_state_change;
+	sk->sk_data_ready	= gprs_data_ready;
+	sk->sk_write_space	= gprs_write_space;
+	release_sock(sk);
+
+	sock_hold(sk);
+	dev->sk = sk;
+
+	printk(KERN_DEBUG"%s: attached\n", net->name);
+	gprs_write_space(sk); /* kick off TX */
+	return net->ifindex;
+
+out_rel:
+	release_sock(sk);
+	unregister_netdev(net);
+	return err;
+}
+
+void gprs_detach(struct sock *sk)
+{
+	struct gprs_dev *dev = sk->sk_user_data;
+	struct net_device *net = dev->net;
+
+	lock_sock(sk);
+	sk->sk_user_data	= NULL;
+	sk->sk_state_change	= dev->old_state_change;
+	sk->sk_data_ready	= dev->old_data_ready;
+	sk->sk_write_space	= dev->old_write_space;
+	release_sock(sk);
+
+	printk(KERN_DEBUG"%s: detached\n", net->name);
+	unregister_netdev(net);
+	flush_scheduled_work();
+	sock_put(sk);
+	skb_queue_purge(&dev->tx_queue);
+}
diff --git a/net/phonet/pep.c b/net/phonet/pep.c
new file mode 100644
index 00000000000..bc6d50f8324
--- /dev/null
+++ b/net/phonet/pep.c
@@ -0,0 +1,1076 @@
+/*
+ * File: pep.c
+ *
+ * Phonet pipe protocol end point socket
+ *
+ * Copyright (C) 2008 Nokia Corporation.
+ *
+ * Author: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/socket.h>
+#include <net/sock.h>
+#include <net/tcp_states.h>
+#include <asm/ioctls.h>
+
+#include <linux/phonet.h>
+#include <net/phonet/phonet.h>
+#include <net/phonet/pep.h>
+#include <net/phonet/gprs.h>
+
+/* sk_state values:
+ * TCP_CLOSE		sock not in use yet
+ * TCP_CLOSE_WAIT	disconnected pipe
+ * TCP_LISTEN		listening pipe endpoint
+ * TCP_SYN_RECV		connected pipe in disabled state
+ * TCP_ESTABLISHED	connected pipe in enabled state
+ *
+ * pep_sock locking:
+ *  - sk_state, ackq, hlist: sock lock needed
+ *  - listener: read only
+ *  - pipe_handle: read only
+ */
+
+#define CREDITS_MAX	10
+#define CREDITS_THR	7
+
+static const struct sockaddr_pn pipe_srv = {
+	.spn_family = AF_PHONET,
+	.spn_resource = 0xD9, /* pipe service */
+};
+
+#define pep_sb_size(s) (((s) + 5) & ~3) /* 2-bytes head, 32-bits aligned */
+
+/* Get the next TLV sub-block. */
+static unsigned char *pep_get_sb(struct sk_buff *skb, u8 *ptype, u8 *plen,
+					void *buf)
+{
+	void *data = NULL;
+	struct {
+		u8 sb_type;
+		u8 sb_len;
+	} *ph, h;
+	int buflen = *plen;
+
+	ph = skb_header_pointer(skb, 0, 2, &h);
+	if (ph == NULL || ph->sb_len < 2 || !pskb_may_pull(skb, ph->sb_len))
+		return NULL;
+	ph->sb_len -= 2;
+	*ptype = ph->sb_type;
+	*plen = ph->sb_len;
+
+	if (buflen > ph->sb_len)
+		buflen = ph->sb_len;
+	data = skb_header_pointer(skb, 2, buflen, buf);
+	__skb_pull(skb, 2 + ph->sb_len);
+	return data;
+}
+
+static int pep_reply(struct sock *sk, struct sk_buff *oskb,
+			u8 code, const void *data, int len, gfp_t priority)
+{
+	const struct pnpipehdr *oph = pnp_hdr(oskb);
+	struct pnpipehdr *ph;
+	struct sk_buff *skb;
+
+	skb = alloc_skb(MAX_PNPIPE_HEADER + len, priority);
+	if (!skb)
+		return -ENOMEM;
+	skb_set_owner_w(skb, sk);
+
+	skb_reserve(skb, MAX_PNPIPE_HEADER);
+	__skb_put(skb, len);
+	skb_copy_to_linear_data(skb, data, len);
+	__skb_push(skb, sizeof(*ph));
+	skb_reset_transport_header(skb);
+	ph = pnp_hdr(skb);
+	ph->utid = oph->utid;
+	ph->message_id = oph->message_id + 1; /* REQ -> RESP */
+	ph->pipe_handle = oph->pipe_handle;
+	ph->error_code = code;
+
+	return pn_skb_send(sk, skb, &pipe_srv);
+}
+
+#define PAD 0x00
+static int pep_accept_conn(struct sock *sk, struct sk_buff *skb)
+{
+	static const u8 data[20] = {
+		PAD, PAD, PAD, 2 /* sub-blocks */,
+		PN_PIPE_SB_REQUIRED_FC_TX, pep_sb_size(5), 3, PAD,
+			PN_MULTI_CREDIT_FLOW_CONTROL,
+			PN_ONE_CREDIT_FLOW_CONTROL,
+			PN_LEGACY_FLOW_CONTROL,
+			PAD,
+		PN_PIPE_SB_PREFERRED_FC_RX, pep_sb_size(5), 3, PAD,
+			PN_MULTI_CREDIT_FLOW_CONTROL,
+			PN_ONE_CREDIT_FLOW_CONTROL,
+			PN_LEGACY_FLOW_CONTROL,
+			PAD,
+	};
+
+	might_sleep();
+	return pep_reply(sk, skb, PN_PIPE_NO_ERROR, data, sizeof(data),
+				GFP_KERNEL);
+}
+
+static int pep_reject_conn(struct sock *sk, struct sk_buff *skb, u8 code)
+{
+	static const u8 data[4] = { PAD, PAD, PAD, 0 /* sub-blocks */ };
+	WARN_ON(code == PN_PIPE_NO_ERROR);
+	return pep_reply(sk, skb, code, data, sizeof(data), GFP_ATOMIC);
+}
+
+/* Control requests are not sent by the pipe service and have a specific
+ * message format. */
+static int pep_ctrlreq_error(struct sock *sk, struct sk_buff *oskb, u8 code,
+				gfp_t priority)
+{
+	const struct pnpipehdr *oph = pnp_hdr(oskb);
+	struct sk_buff *skb;
+	struct pnpipehdr *ph;
+	struct sockaddr_pn dst;
+
+	skb = alloc_skb(MAX_PNPIPE_HEADER + 4, priority);
+	if (!skb)
+		return -ENOMEM;
+	skb_set_owner_w(skb, sk);
+
+	skb_reserve(skb, MAX_PHONET_HEADER);
+	ph = (struct pnpipehdr *)skb_put(skb, sizeof(*ph) + 4);
+
+	ph->utid = oph->utid;
+	ph->message_id = PNS_PEP_CTRL_RESP;
+	ph->pipe_handle = oph->pipe_handle;
+	ph->data[0] = oph->data[1]; /* CTRL id */
+	ph->data[1] = oph->data[0]; /* PEP type */
+	ph->data[2] = code; /* error code, at an usual offset */
+	ph->data[3] = PAD;
+	ph->data[4] = PAD;
+
+	pn_skb_get_src_sockaddr(oskb, &dst);
+	return pn_skb_send(sk, skb, &dst);
+}
+
+static int pipe_snd_status(struct sock *sk, u8 type, u8 status, gfp_t priority)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	struct pnpipehdr *ph;
+	struct sk_buff *skb;
+
+	skb = alloc_skb(MAX_PNPIPE_HEADER + 4, priority);
+	if (!skb)
+		return -ENOMEM;
+	skb_set_owner_w(skb, sk);
+
+	skb_reserve(skb, MAX_PNPIPE_HEADER + 4);
+	__skb_push(skb, sizeof(*ph) + 4);
+	skb_reset_transport_header(skb);
+	ph = pnp_hdr(skb);
+	ph->utid = 0;
+	ph->message_id = PNS_PEP_STATUS_IND;
+	ph->pipe_handle = pn->pipe_handle;
+	ph->pep_type = PN_PEP_TYPE_COMMON;
+	ph->data[1] = type;
+	ph->data[2] = PAD;
+	ph->data[3] = PAD;
+	ph->data[4] = status;
+
+	return pn_skb_send(sk, skb, &pipe_srv);
+}
+
+/* Send our RX flow control information to the sender.
+ * Socket must be locked. */
+static void pipe_grant_credits(struct sock *sk)
+{
+	struct pep_sock *pn = pep_sk(sk);
+
+	BUG_ON(sk->sk_state != TCP_ESTABLISHED);
+
+	switch (pn->rx_fc) {
+	case PN_LEGACY_FLOW_CONTROL: /* TODO */
+		break;
+	case PN_ONE_CREDIT_FLOW_CONTROL:
+		pipe_snd_status(sk, PN_PEP_IND_FLOW_CONTROL,
+				PEP_IND_READY, GFP_ATOMIC);
+		pn->rx_credits = 1;
+		break;
+	case PN_MULTI_CREDIT_FLOW_CONTROL:
+		if ((pn->rx_credits + CREDITS_THR) > CREDITS_MAX)
+			break;
+		if (pipe_snd_status(sk, PN_PEP_IND_ID_MCFC_GRANT_CREDITS,
+					CREDITS_MAX - pn->rx_credits,
+					GFP_ATOMIC) == 0)
+			pn->rx_credits = CREDITS_MAX;
+		break;
+	}
+}
+
+static int pipe_rcv_status(struct sock *sk, struct sk_buff *skb)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	struct pnpipehdr *hdr = pnp_hdr(skb);
+
+	if (!pskb_may_pull(skb, sizeof(*hdr) + 4))
+		return -EINVAL;
+
+	if (hdr->data[0] != PN_PEP_TYPE_COMMON) {
+		LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP type: %u\n",
+				(unsigned)hdr->data[0]);
+		return -EOPNOTSUPP;
+	}
+
+	switch (hdr->data[1]) {
+	case PN_PEP_IND_FLOW_CONTROL:
+		switch (pn->tx_fc) {
+		case PN_LEGACY_FLOW_CONTROL:
+			switch (hdr->data[4]) {
+			case PEP_IND_BUSY:
+				pn->tx_credits = 0;
+				break;
+			case PEP_IND_READY:
+				pn->tx_credits = 1;
+				break;
+			}
+			break;
+		case PN_ONE_CREDIT_FLOW_CONTROL:
+			if (hdr->data[4] == PEP_IND_READY)
+				pn->tx_credits = 1;
+			break;
+		}
+		break;
+
+	case PN_PEP_IND_ID_MCFC_GRANT_CREDITS:
+		if (pn->tx_fc != PN_MULTI_CREDIT_FLOW_CONTROL)
+			break;
+		if (pn->tx_credits + hdr->data[4] > 0xff)
+			pn->tx_credits = 0xff;
+		else
+			pn->tx_credits += hdr->data[4];
+		break;
+
+	default:
+		LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP indication: %u\n",
+				(unsigned)hdr->data[1]);
+		return -EOPNOTSUPP;
+	}
+	if (pn->tx_credits)
+		sk->sk_write_space(sk);
+	return 0;
+}
+
+static int pipe_rcv_created(struct sock *sk, struct sk_buff *skb)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	struct pnpipehdr *hdr = pnp_hdr(skb);
+	u8 n_sb = hdr->data[0];
+
+	pn->rx_fc = pn->tx_fc = PN_LEGACY_FLOW_CONTROL;
+	__skb_pull(skb, sizeof(*hdr));
+	while (n_sb > 0) {
+		u8 type, buf[2], len = sizeof(buf);
+		u8 *data = pep_get_sb(skb, &type, &len, buf);
+
+		if (data == NULL)
+			return -EINVAL;
+		switch (type) {
+		case PN_PIPE_SB_NEGOTIATED_FC:
+			if (len < 2 || (data[0] | data[1]) > 3)
+				break;
+			pn->tx_fc = data[0] & 3;
+			pn->rx_fc = data[1] & 3;
+			break;
+		}
+		n_sb--;
+	}
+	return 0;
+}
+
+/* Queue an skb to a connected sock.
+ * Socket lock must be held. */
+static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	struct pnpipehdr *hdr = pnp_hdr(skb);
+	struct sk_buff_head *queue;
+	int err = 0;
+
+	BUG_ON(sk->sk_state == TCP_CLOSE_WAIT);
+
+	switch (hdr->message_id) {
+	case PNS_PEP_CONNECT_REQ:
+		pep_reject_conn(sk, skb, PN_PIPE_ERR_PEP_IN_USE);
+		break;
+
+	case PNS_PEP_DISCONNECT_REQ:
+		pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC);
+		sk->sk_state = TCP_CLOSE_WAIT;
+		if (!sock_flag(sk, SOCK_DEAD))
+			sk->sk_state_change(sk);
+		break;
+
+	case PNS_PEP_ENABLE_REQ:
+		/* Wait for PNS_PIPE_(ENABLED|REDIRECTED)_IND */
+		pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC);
+		break;
+
+	case PNS_PEP_RESET_REQ:
+		switch (hdr->state_after_reset) {
+		case PN_PIPE_DISABLE:
+			pn->init_enable = 0;
+			break;
+		case PN_PIPE_ENABLE:
+			pn->init_enable = 1;
+			break;
+		default: /* not allowed to send an error here!? */
+			err = -EINVAL;
+			goto out;
+		}
+		/* fall through */
+	case PNS_PEP_DISABLE_REQ:
+		pn->tx_credits = 0;
+		pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC);
+		break;
+
+	case PNS_PEP_CTRL_REQ:
+		if (skb_queue_len(&pn->ctrlreq_queue) >= PNPIPE_CTRLREQ_MAX)
+			break;
+		__skb_pull(skb, 4);
+		queue = &pn->ctrlreq_queue;
+		goto queue;
+
+	case PNS_PIPE_DATA:
+		__skb_pull(skb, 3); /* Pipe data header */
+		if (!pn_flow_safe(pn->rx_fc)) {
+			err = sock_queue_rcv_skb(sk, skb);
+			if (!err)
+				return 0;
+			break;
+		}
+
+		if (pn->rx_credits == 0) {
+			err = -ENOBUFS;
+			break;
+		}
+		pn->rx_credits--;
+		queue = &sk->sk_receive_queue;
+		goto queue;
+
+	case PNS_PEP_STATUS_IND:
+		pipe_rcv_status(sk, skb);
+		break;
+
+	case PNS_PIPE_REDIRECTED_IND:
+		err = pipe_rcv_created(sk, skb);
+		break;
+
+	case PNS_PIPE_CREATED_IND:
+		err = pipe_rcv_created(sk, skb);
+		if (err)
+			break;
+		/* fall through */
+	case PNS_PIPE_RESET_IND:
+		if (!pn->init_enable)
+			break;
+		/* fall through */
+	case PNS_PIPE_ENABLED_IND:
+		if (!pn_flow_safe(pn->tx_fc)) {
+			pn->tx_credits = 1;
+			sk->sk_write_space(sk);
+		}
+		if (sk->sk_state == TCP_ESTABLISHED)
+			break; /* Nothing to do */
+		sk->sk_state = TCP_ESTABLISHED;
+		pipe_grant_credits(sk);
+		break;
+
+	case PNS_PIPE_DISABLED_IND:
+		sk->sk_state = TCP_SYN_RECV;
+		pn->rx_credits = 0;
+		break;
+
+	default:
+		LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP message: %u\n",
+				hdr->message_id);
+		err = -EINVAL;
+	}
+out:
+	kfree_skb(skb);
+	return err;
+
+queue:
+	skb->dev = NULL;
+	skb_set_owner_r(skb, sk);
+	err = skb->len;
+	skb_queue_tail(queue, skb);
+	if (!sock_flag(sk, SOCK_DEAD))
+		sk->sk_data_ready(sk, err);
+	return 0;
+}
+
+/* Destroy connected sock. */
+static void pipe_destruct(struct sock *sk)
+{
+	struct pep_sock *pn = pep_sk(sk);
+
+	skb_queue_purge(&sk->sk_receive_queue);
+	skb_queue_purge(&pn->ctrlreq_queue);
+}
+
+static int pep_connreq_rcv(struct sock *sk, struct sk_buff *skb)
+{
+	struct sock *newsk;
+	struct pep_sock *newpn, *pn = pep_sk(sk);
+	struct pnpipehdr *hdr;
+	struct sockaddr_pn dst;
+	u16 peer_type;
+	u8 pipe_handle, enabled, n_sb;
+
+	if (!pskb_pull(skb, sizeof(*hdr) + 4))
+		return -EINVAL;
+
+	hdr = pnp_hdr(skb);
+	pipe_handle = hdr->pipe_handle;
+	switch (hdr->state_after_connect) {
+	case PN_PIPE_DISABLE:
+		enabled = 0;
+		break;
+	case PN_PIPE_ENABLE:
+		enabled = 1;
+		break;
+	default:
+		pep_reject_conn(sk, skb, PN_PIPE_ERR_INVALID_PARAM);
+		return -EINVAL;
+	}
+	peer_type = hdr->other_pep_type << 8;
+
+	if (unlikely(sk->sk_state != TCP_LISTEN) || sk_acceptq_is_full(sk)) {
+		pep_reject_conn(sk, skb, PN_PIPE_ERR_PEP_IN_USE);
+		return -ENOBUFS;
+	}
+
+	/* Parse sub-blocks (options) */
+	n_sb = hdr->data[4];
+	while (n_sb > 0) {
+		u8 type, buf[1], len = sizeof(buf);
+		const u8 *data = pep_get_sb(skb, &type, &len, buf);
+
+		if (data == NULL)
+			return -EINVAL;
+		switch (type) {
+		case PN_PIPE_SB_CONNECT_REQ_PEP_SUB_TYPE:
+			if (len < 1)
+				return -EINVAL;
+			peer_type = (peer_type & 0xff00) | data[0];
+			break;
+		}
+		n_sb--;
+	}
+
+	skb = skb_clone(skb, GFP_ATOMIC);
+	if (!skb)
+		return -ENOMEM;
+
+	/* Create a new to-be-accepted sock */
+	newsk = sk_alloc(sock_net(sk), PF_PHONET, GFP_ATOMIC, sk->sk_prot);
+	if (!newsk) {
+		kfree_skb(skb);
+		return -ENOMEM;
+	}
+	sock_init_data(NULL, newsk);
+	newsk->sk_state = TCP_SYN_RECV;
+	newsk->sk_backlog_rcv = pipe_do_rcv;
+	newsk->sk_protocol = sk->sk_protocol;
+	newsk->sk_destruct = pipe_destruct;
+
+	newpn = pep_sk(newsk);
+	pn_skb_get_dst_sockaddr(skb, &dst);
+	newpn->pn_sk.sobject = pn_sockaddr_get_object(&dst);
+	newpn->pn_sk.resource = pn->pn_sk.resource;
+	skb_queue_head_init(&newpn->ctrlreq_queue);
+	newpn->pipe_handle = pipe_handle;
+	newpn->peer_type = peer_type;
+	newpn->rx_credits = newpn->tx_credits = 0;
+	newpn->rx_fc = newpn->tx_fc = PN_LEGACY_FLOW_CONTROL;
+	newpn->init_enable = enabled;
+
+	BUG_ON(!skb_queue_empty(&newsk->sk_receive_queue));
+	skb_queue_head(&newsk->sk_receive_queue, skb);
+	if (!sock_flag(sk, SOCK_DEAD))
+		sk->sk_data_ready(sk, 0);
+
+	sk_acceptq_added(sk);
+	sk_add_node(newsk, &pn->ackq);
+	return 0;
+}
+
+/* Listening sock must be locked */
+static struct sock *pep_find_pipe(const struct hlist_head *hlist,
+					const struct sockaddr_pn *dst,
+					u8 pipe_handle)
+{
+	struct hlist_node *node;
+	struct sock *sknode;
+	u16 dobj = pn_sockaddr_get_object(dst);
+
+	sk_for_each(sknode, node, hlist) {
+		struct pep_sock *pnnode = pep_sk(sknode);
+
+		/* Ports match, but addresses might not: */
+		if (pnnode->pn_sk.sobject != dobj)
+			continue;
+		if (pnnode->pipe_handle != pipe_handle)
+			continue;
+		if (sknode->sk_state == TCP_CLOSE_WAIT)
+			continue;
+
+		sock_hold(sknode);
+		return sknode;
+	}
+	return NULL;
+}
+
+/*
+ * Deliver an skb to a listening sock.
+ * Socket lock must be held.
+ * We then queue the skb to the right connected sock (if any).
+ */
+static int pep_do_rcv(struct sock *sk, struct sk_buff *skb)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	struct sock *sknode;
+	struct pnpipehdr *hdr = pnp_hdr(skb);
+	struct sockaddr_pn dst;
+	int err = NET_RX_SUCCESS;
+	u8 pipe_handle;
+
+	if (!pskb_may_pull(skb, sizeof(*hdr)))
+		goto drop;
+
+	hdr = pnp_hdr(skb);
+	pipe_handle = hdr->pipe_handle;
+	if (pipe_handle == PN_PIPE_INVALID_HANDLE)
+		goto drop;
+
+	pn_skb_get_dst_sockaddr(skb, &dst);
+
+	/* Look for an existing pipe handle */
+	sknode = pep_find_pipe(&pn->hlist, &dst, pipe_handle);
+	if (sknode)
+		return sk_receive_skb(sknode, skb, 1);
+
+	/* Look for a pipe handle pending accept */
+	sknode = pep_find_pipe(&pn->ackq, &dst, pipe_handle);
+	if (sknode) {
+		sock_put(sknode);
+		if (net_ratelimit())
+			printk(KERN_WARNING"Phonet unconnected PEP ignored");
+		err = NET_RX_DROP;
+		goto drop;
+	}
+
+	switch (hdr->message_id) {
+	case PNS_PEP_CONNECT_REQ:
+		err = pep_connreq_rcv(sk, skb);
+		break;
+
+	case PNS_PEP_DISCONNECT_REQ:
+		pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC);
+		break;
+
+	case PNS_PEP_CTRL_REQ:
+		pep_ctrlreq_error(sk, skb, PN_PIPE_INVALID_HANDLE, GFP_ATOMIC);
+		break;
+
+	case PNS_PEP_RESET_REQ:
+	case PNS_PEP_ENABLE_REQ:
+	case PNS_PEP_DISABLE_REQ:
+		/* invalid handle is not even allowed here! */
+	default:
+		err = NET_RX_DROP;
+	}
+drop:
+	kfree_skb(skb);
+	return err;
+}
+
+/* associated socket ceases to exist */
+static void pep_sock_close(struct sock *sk, long timeout)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	int ifindex = 0;
+
+	sk_common_release(sk);
+
+	lock_sock(sk);
+	if (sk->sk_state == TCP_LISTEN) {
+		/* Destroy the listen queue */
+		struct sock *sknode;
+		struct hlist_node *p, *n;
+
+		sk_for_each_safe(sknode, p, n, &pn->ackq)
+			sk_del_node_init(sknode);
+		sk->sk_state = TCP_CLOSE;
+	}
+	ifindex = pn->ifindex;
+	pn->ifindex = 0;
+	release_sock(sk);
+
+	if (ifindex)
+		gprs_detach(sk);
+}
+
+static int pep_wait_connreq(struct sock *sk, int noblock)
+{
+	struct task_struct *tsk = current;
+	struct pep_sock *pn = pep_sk(sk);
+	long timeo = sock_rcvtimeo(sk, noblock);
+
+	for (;;) {
+		DEFINE_WAIT(wait);
+
+		if (sk->sk_state != TCP_LISTEN)
+			return -EINVAL;
+		if (!hlist_empty(&pn->ackq))
+			break;
+		if (!timeo)
+			return -EWOULDBLOCK;
+		if (signal_pending(tsk))
+			return sock_intr_errno(timeo);
+
+		prepare_to_wait_exclusive(&sk->sk_socket->wait, &wait,
+						TASK_INTERRUPTIBLE);
+		release_sock(sk);
+		timeo = schedule_timeout(timeo);
+		lock_sock(sk);
+		finish_wait(&sk->sk_socket->wait, &wait);
+	}
+
+	return 0;
+}
+
+static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	struct sock *newsk = NULL;
+	struct sk_buff *oskb;
+	int err;
+
+	lock_sock(sk);
+	err = pep_wait_connreq(sk, flags & O_NONBLOCK);
+	if (err)
+		goto out;
+
+	newsk = __sk_head(&pn->ackq);
+
+	oskb = skb_dequeue(&newsk->sk_receive_queue);
+	err = pep_accept_conn(newsk, oskb);
+	if (err) {
+		skb_queue_head(&newsk->sk_receive_queue, oskb);
+		newsk = NULL;
+		goto out;
+	}
+
+	sock_hold(sk);
+	pep_sk(newsk)->listener = sk;
+
+	sock_hold(newsk);
+	sk_del_node_init(newsk);
+	sk_acceptq_removed(sk);
+	sk_add_node(newsk, &pn->hlist);
+	__sock_put(newsk);
+
+out:
+	release_sock(sk);
+	*errp = err;
+	return newsk;
+}
+
+static int pep_ioctl(struct sock *sk, int cmd, unsigned long arg)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	int answ;
+
+	switch (cmd) {
+	case SIOCINQ:
+		if (sk->sk_state == TCP_LISTEN)
+			return -EINVAL;
+
+		lock_sock(sk);
+		if (sock_flag(sk, SOCK_URGINLINE)
+		 && !skb_queue_empty(&pn->ctrlreq_queue))
+			answ = skb_peek(&pn->ctrlreq_queue)->len;
+		else if (!skb_queue_empty(&sk->sk_receive_queue))
+			answ = skb_peek(&sk->sk_receive_queue)->len;
+		else
+			answ = 0;
+		release_sock(sk);
+		return put_user(answ, (int __user *)arg);
+	}
+
+	return -ENOIOCTLCMD;
+}
+
+static int pep_init(struct sock *sk)
+{
+	struct pep_sock *pn = pep_sk(sk);
+
+	INIT_HLIST_HEAD(&pn->ackq);
+	INIT_HLIST_HEAD(&pn->hlist);
+	skb_queue_head_init(&pn->ctrlreq_queue);
+	pn->pipe_handle = PN_PIPE_INVALID_HANDLE;
+	return 0;
+}
+
+static int pep_setsockopt(struct sock *sk, int level, int optname,
+				char __user *optval, int optlen)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	int val = 0, err = 0;
+
+	if (level != SOL_PNPIPE)
+		return -ENOPROTOOPT;
+	if (optlen >= sizeof(int)) {
+		if (get_user(val, (int __user *) optval))
+			return -EFAULT;
+	}
+
+	lock_sock(sk);
+	switch (optname) {
+	case PNPIPE_ENCAP:
+		if (val && val != PNPIPE_ENCAP_IP) {
+			err = -EINVAL;
+			break;
+		}
+		if (!pn->ifindex == !val)
+			break; /* Nothing to do! */
+		if (!capable(CAP_NET_ADMIN)) {
+			err = -EPERM;
+			break;
+		}
+		if (val) {
+			release_sock(sk);
+			err = gprs_attach(sk);
+			if (err > 0) {
+				pn->ifindex = err;
+				err = 0;
+			}
+		} else {
+			pn->ifindex = 0;
+			release_sock(sk);
+			gprs_detach(sk);
+			err = 0;
+		}
+		goto out_norel;
+	default:
+		err = -ENOPROTOOPT;
+	}
+	release_sock(sk);
+
+out_norel:
+	return err;
+}
+
+static int pep_getsockopt(struct sock *sk, int level, int optname,
+				char __user *optval, int __user *optlen)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	int len, val;
+
+	if (level != SOL_PNPIPE)
+		return -ENOPROTOOPT;
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	switch (optname) {
+	case PNPIPE_ENCAP:
+		val = pn->ifindex ? PNPIPE_ENCAP_IP : PNPIPE_ENCAP_NONE;
+		break;
+	case PNPIPE_IFINDEX:
+		val = pn->ifindex;
+		break;
+	default:
+		return -ENOPROTOOPT;
+	}
+
+	len = min_t(unsigned int, sizeof(int), len);
+	if (put_user(len, optlen))
+		return -EFAULT;
+	if (put_user(val, (int __user *) optval))
+		return -EFAULT;
+	return 0;
+}
+
+static int pipe_skb_send(struct sock *sk, struct sk_buff *skb)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	struct pnpipehdr *ph;
+
+	skb_push(skb, 3);
+	skb_reset_transport_header(skb);
+	ph = pnp_hdr(skb);
+	ph->utid = 0;
+	ph->message_id = PNS_PIPE_DATA;
+	ph->pipe_handle = pn->pipe_handle;
+	if (pn_flow_safe(pn->tx_fc) && pn->tx_credits)
+		pn->tx_credits--;
+
+	return pn_skb_send(sk, skb, &pipe_srv);
+}
+
+static int pep_sendmsg(struct kiocb *iocb, struct sock *sk,
+			struct msghdr *msg, size_t len)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	struct sk_buff *skb = NULL;
+	long timeo;
+	int flags = msg->msg_flags;
+	int err, done;
+
+	if (msg->msg_flags & MSG_OOB || !(msg->msg_flags & MSG_EOR))
+		return -EOPNOTSUPP;
+
+	lock_sock(sk);
+	timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
+	if ((1 << sk->sk_state) & (TCPF_LISTEN|TCPF_CLOSE)) {
+		err = -ENOTCONN;
+		goto out;
+	}
+	if (sk->sk_state != TCP_ESTABLISHED) {
+		/* Wait until the pipe gets to enabled state */
+disabled:
+		err = sk_stream_wait_connect(sk, &timeo);
+		if (err)
+			goto out;
+
+		if (sk->sk_state == TCP_CLOSE_WAIT) {
+			err = -ECONNRESET;
+			goto out;
+		}
+	}
+	BUG_ON(sk->sk_state != TCP_ESTABLISHED);
+
+	/* Wait until flow control allows TX */
+	done = pn->tx_credits > 0;
+	while (!done) {
+		DEFINE_WAIT(wait);
+
+		if (!timeo) {
+			err = -EAGAIN;
+			goto out;
+		}
+		if (signal_pending(current)) {
+			err = sock_intr_errno(timeo);
+			goto out;
+		}
+
+		prepare_to_wait(&sk->sk_socket->wait, &wait,
+				TASK_INTERRUPTIBLE);
+		done = sk_wait_event(sk, &timeo, pn->tx_credits > 0);
+		finish_wait(&sk->sk_socket->wait, &wait);
+
+		if (sk->sk_state != TCP_ESTABLISHED)
+			goto disabled;
+	}
+
+	if (!skb) {
+		skb = sock_alloc_send_skb(sk, MAX_PNPIPE_HEADER + len,
+						flags & MSG_DONTWAIT, &err);
+		if (skb == NULL)
+			goto out;
+		skb_reserve(skb, MAX_PHONET_HEADER + 3);
+
+		if (sk->sk_state != TCP_ESTABLISHED || !pn->tx_credits)
+			goto disabled; /* sock_alloc_send_skb might sleep */
+	}
+
+	err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
+	if (err < 0)
+		goto out;
+
+	err = pipe_skb_send(sk, skb);
+	if (err >= 0)
+		err = len; /* success! */
+	skb = NULL;
+out:
+	release_sock(sk);
+	kfree_skb(skb);
+	return err;
+}
+
+int pep_writeable(struct sock *sk)
+{
+	struct pep_sock *pn = pep_sk(sk);
+
+	return (sk->sk_state == TCP_ESTABLISHED) ? pn->tx_credits : 0;
+}
+
+int pep_write(struct sock *sk, struct sk_buff *skb)
+{
+	struct sk_buff *rskb, *fs;
+	int flen = 0;
+
+	rskb = alloc_skb(MAX_PNPIPE_HEADER, GFP_ATOMIC);
+	if (!rskb) {
+		kfree_skb(skb);
+		return -ENOMEM;
+	}
+	skb_shinfo(rskb)->frag_list = skb;
+	rskb->len += skb->len;
+	rskb->data_len += rskb->len;
+	rskb->truesize += rskb->len;
+
+	/* Avoid nested fragments */
+	for (fs = skb_shinfo(skb)->frag_list; fs; fs = fs->next)
+		flen += fs->len;
+	skb->next = skb_shinfo(skb)->frag_list;
+	skb_shinfo(skb)->frag_list = NULL;
+	skb->len -= flen;
+	skb->data_len -= flen;
+	skb->truesize -= flen;
+
+	skb_reserve(rskb, MAX_PHONET_HEADER + 3);
+	return pipe_skb_send(sk, rskb);
+}
+
+struct sk_buff *pep_read(struct sock *sk)
+{
+	struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
+
+	if (sk->sk_state == TCP_ESTABLISHED)
+		pipe_grant_credits(sk);
+	return skb;
+}
+
+static int pep_recvmsg(struct kiocb *iocb, struct sock *sk,
+			struct msghdr *msg, size_t len, int noblock,
+			int flags, int *addr_len)
+{
+	struct sk_buff *skb;
+	int err;
+
+	if (unlikely(1 << sk->sk_state & (TCPF_LISTEN | TCPF_CLOSE)))
+		return -ENOTCONN;
+
+	if ((flags & MSG_OOB) || sock_flag(sk, SOCK_URGINLINE)) {
+		/* Dequeue and acknowledge control request */
+		struct pep_sock *pn = pep_sk(sk);
+
+		skb = skb_dequeue(&pn->ctrlreq_queue);
+		if (skb) {
+			pep_ctrlreq_error(sk, skb, PN_PIPE_NO_ERROR,
+						GFP_KERNEL);
+			msg->msg_flags |= MSG_OOB;
+			goto copy;
+		}
+		if (flags & MSG_OOB)
+			return -EINVAL;
+	}
+
+	skb = skb_recv_datagram(sk, flags, noblock, &err);
+	lock_sock(sk);
+	if (skb == NULL) {
+		if (err == -ENOTCONN && sk->sk_state == TCP_CLOSE_WAIT)
+			err = -ECONNRESET;
+		release_sock(sk);
+		return err;
+	}
+
+	if (sk->sk_state == TCP_ESTABLISHED)
+		pipe_grant_credits(sk);
+	release_sock(sk);
+copy:
+	msg->msg_flags |= MSG_EOR;
+	if (skb->len > len)
+		msg->msg_flags |= MSG_TRUNC;
+	else
+		len = skb->len;
+
+	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len);
+	if (!err)
+		err = (flags & MSG_TRUNC) ? skb->len : len;
+
+	skb_free_datagram(sk, skb);
+	return err;
+}
+
+static void pep_sock_unhash(struct sock *sk)
+{
+	struct pep_sock *pn = pep_sk(sk);
+	struct sock *skparent = NULL;
+
+	lock_sock(sk);
+	if ((1 << sk->sk_state) & ~(TCPF_CLOSE|TCPF_LISTEN)) {
+		skparent = pn->listener;
+		sk_del_node_init(sk);
+		release_sock(sk);
+
+		sk = skparent;
+		pn = pep_sk(skparent);
+		lock_sock(sk);
+	}
+	/* Unhash a listening sock only when it is closed
+	 * and all of its active connected pipes are closed. */
+	if (hlist_empty(&pn->hlist))
+		pn_sock_unhash(&pn->pn_sk.sk);
+	release_sock(sk);
+
+	if (skparent)
+		sock_put(skparent);
+}
+
+static struct proto pep_proto = {
+	.close		= pep_sock_close,
+	.accept		= pep_sock_accept,
+	.ioctl		= pep_ioctl,
+	.init		= pep_init,
+	.setsockopt	= pep_setsockopt,
+	.getsockopt	= pep_getsockopt,
+	.sendmsg	= pep_sendmsg,
+	.recvmsg	= pep_recvmsg,
+	.backlog_rcv	= pep_do_rcv,
+	.hash		= pn_sock_hash,
+	.unhash		= pep_sock_unhash,
+	.get_port	= pn_sock_get_port,
+	.obj_size	= sizeof(struct pep_sock),
+	.owner		= THIS_MODULE,
+	.name		= "PNPIPE",
+};
+
+static struct phonet_protocol pep_pn_proto = {
+	.ops		= &phonet_stream_ops,
+	.prot		= &pep_proto,
+	.sock_type	= SOCK_SEQPACKET,
+};
+
+static int __init pep_register(void)
+{
+	return phonet_proto_register(PN_PROTO_PIPE, &pep_pn_proto);
+}
+
+static void __exit pep_unregister(void)
+{
+	phonet_proto_unregister(PN_PROTO_PIPE, &pep_pn_proto);
+}
+
+module_init(pep_register);
+module_exit(pep_unregister);
+MODULE_AUTHOR("Remi Denis-Courmont, Nokia");
+MODULE_DESCRIPTION("Phonet pipe protocol");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NET_PF_PROTO(PF_PHONET, PN_PROTO_PIPE);
diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c
new file mode 100644
index 00000000000..53be9fc82aa
--- /dev/null
+++ b/net/phonet/pn_dev.c
@@ -0,0 +1,208 @@
+/*
+ * File: pn_dev.c
+ *
+ * Phonet network device
+ *
+ * Copyright (C) 2008 Nokia Corporation.
+ *
+ * Contact: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
+ * Original author: Sakari Ailus <sakari.ailus@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/net.h>
+#include <linux/netdevice.h>
+#include <linux/phonet.h>
+#include <net/sock.h>
+#include <net/phonet/pn_dev.h>
+
+/* when accessing, remember to lock with spin_lock(&pndevs.lock); */
+struct phonet_device_list pndevs = {
+	.list = LIST_HEAD_INIT(pndevs.list),
+	.lock = __SPIN_LOCK_UNLOCKED(pndevs.lock),
+};
+
+/* Allocate new Phonet device. */
+static struct phonet_device *__phonet_device_alloc(struct net_device *dev)
+{
+	struct phonet_device *pnd = kmalloc(sizeof(*pnd), GFP_ATOMIC);
+	if (pnd == NULL)
+		return NULL;
+	pnd->netdev = dev;
+	bitmap_zero(pnd->addrs, 64);
+
+	list_add(&pnd->list, &pndevs.list);
+	return pnd;
+}
+
+static struct phonet_device *__phonet_get(struct net_device *dev)
+{
+	struct phonet_device *pnd;
+
+	list_for_each_entry(pnd, &pndevs.list, list) {
+		if (pnd->netdev == dev)
+			return pnd;
+	}
+	return NULL;
+}
+
+static void __phonet_device_free(struct phonet_device *pnd)
+{
+	list_del(&pnd->list);
+	kfree(pnd);
+}
+
+struct net_device *phonet_device_get(struct net *net)
+{
+	struct phonet_device *pnd;
+	struct net_device *dev;
+
+	spin_lock_bh(&pndevs.lock);
+	list_for_each_entry(pnd, &pndevs.list, list) {
+		dev = pnd->netdev;
+		BUG_ON(!dev);
+
+		if (dev_net(dev) == net &&
+			(dev->reg_state == NETREG_REGISTERED) &&
+			((pnd->netdev->flags & IFF_UP)) == IFF_UP)
+			break;
+		dev = NULL;
+	}
+	if (dev)
+		dev_hold(dev);
+	spin_unlock_bh(&pndevs.lock);
+	return dev;
+}
+
+int phonet_address_add(struct net_device *dev, u8 addr)
+{
+	struct phonet_device *pnd;
+	int err = 0;
+
+	spin_lock_bh(&pndevs.lock);
+	/* Find or create Phonet-specific device data */
+	pnd = __phonet_get(dev);
+	if (pnd == NULL)
+		pnd = __phonet_device_alloc(dev);
+	if (unlikely(pnd == NULL))
+		err = -ENOMEM;
+	else if (test_and_set_bit(addr >> 2, pnd->addrs))
+		err = -EEXIST;
+	spin_unlock_bh(&pndevs.lock);
+	return err;
+}
+
+int phonet_address_del(struct net_device *dev, u8 addr)
+{
+	struct phonet_device *pnd;
+	int err = 0;
+
+	spin_lock_bh(&pndevs.lock);
+	pnd = __phonet_get(dev);
+	if (!pnd || !test_and_clear_bit(addr >> 2, pnd->addrs))
+		err = -EADDRNOTAVAIL;
+	if (bitmap_empty(pnd->addrs, 64))
+		__phonet_device_free(pnd);
+	spin_unlock_bh(&pndevs.lock);
+	return err;
+}
+
+/* Gets a source address toward a destination, through a interface. */
+u8 phonet_address_get(struct net_device *dev, u8 addr)
+{
+	struct phonet_device *pnd;
+
+	spin_lock_bh(&pndevs.lock);
+	pnd = __phonet_get(dev);
+	if (pnd) {
+		BUG_ON(bitmap_empty(pnd->addrs, 64));
+
+		/* Use same source address as destination, if possible */
+		if (!test_bit(addr >> 2, pnd->addrs))
+			addr = find_first_bit(pnd->addrs, 64) << 2;
+	} else
+		addr = PN_NO_ADDR;
+	spin_unlock_bh(&pndevs.lock);
+	return addr;
+}
+
+int phonet_address_lookup(u8 addr)
+{
+	struct phonet_device *pnd;
+
+	spin_lock_bh(&pndevs.lock);
+	list_for_each_entry(pnd, &pndevs.list, list) {
+		/* Don't allow unregistering devices! */
+		if ((pnd->netdev->reg_state != NETREG_REGISTERED) ||
+				((pnd->netdev->flags & IFF_UP)) != IFF_UP)
+			continue;
+
+		if (test_bit(addr >> 2, pnd->addrs)) {
+			spin_unlock_bh(&pndevs.lock);
+			return 0;
+		}
+	}
+	spin_unlock_bh(&pndevs.lock);
+	return -EADDRNOTAVAIL;
+}
+
+/* notify Phonet of device events */
+static int phonet_device_notify(struct notifier_block *me, unsigned long what,
+				void *arg)
+{
+	struct net_device *dev = arg;
+
+	if (what == NETDEV_UNREGISTER) {
+		struct phonet_device *pnd;
+
+		/* Destroy phonet-specific device data */
+		spin_lock_bh(&pndevs.lock);
+		pnd = __phonet_get(dev);
+		if (pnd)
+			__phonet_device_free(pnd);
+		spin_unlock_bh(&pndevs.lock);
+	}
+	return 0;
+
+}
+
+static struct notifier_block phonet_device_notifier = {
+	.notifier_call = phonet_device_notify,
+	.priority = 0,
+};
+
+/* Initialize Phonet devices list */
+void phonet_device_init(void)
+{
+	register_netdevice_notifier(&phonet_device_notifier);
+}
+
+void phonet_device_exit(void)
+{
+	struct phonet_device *pnd, *n;
+
+	rtnl_unregister_all(PF_PHONET);
+	rtnl_lock();
+	spin_lock_bh(&pndevs.lock);
+
+	list_for_each_entry_safe(pnd, n, &pndevs.list, list)
+		__phonet_device_free(pnd);
+
+	spin_unlock_bh(&pndevs.lock);
+	rtnl_unlock();
+	unregister_netdevice_notifier(&phonet_device_notifier);
+}
diff --git a/net/phonet/pn_netlink.c b/net/phonet/pn_netlink.c
new file mode 100644
index 00000000000..b1770d66bc8
--- /dev/null
+++ b/net/phonet/pn_netlink.c
@@ -0,0 +1,165 @@
+/*
+ * File: pn_netlink.c
+ *
+ * Phonet netlink interface
+ *
+ * Copyright (C) 2008 Nokia Corporation.
+ *
+ * Contact: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
+ * Original author: Sakari Ailus <sakari.ailus@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/netlink.h>
+#include <linux/phonet.h>
+#include <net/sock.h>
+#include <net/phonet/pn_dev.h>
+
+static int fill_addr(struct sk_buff *skb, struct net_device *dev, u8 addr,
+		     u32 pid, u32 seq, int event);
+
+static void rtmsg_notify(int event, struct net_device *dev, u8 addr)
+{
+	struct sk_buff *skb;
+	int err = -ENOBUFS;
+
+	skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
+			nla_total_size(1), GFP_KERNEL);
+	if (skb == NULL)
+		goto errout;
+	err = fill_addr(skb, dev, addr, 0, 0, event);
+	if (err < 0) {
+		WARN_ON(err == -EMSGSIZE);
+		kfree_skb(skb);
+		goto errout;
+	}
+	err = rtnl_notify(skb, dev_net(dev), 0,
+			  RTNLGRP_PHONET_IFADDR, NULL, GFP_KERNEL);
+errout:
+	if (err < 0)
+		rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_IFADDR, err);
+}
+
+static const struct nla_policy ifa_phonet_policy[IFA_MAX+1] = {
+	[IFA_LOCAL] = { .type = NLA_U8 },
+};
+
+static int addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *attr)
+{
+	struct net *net = sock_net(skb->sk);
+	struct nlattr *tb[IFA_MAX+1];
+	struct net_device *dev;
+	struct ifaddrmsg *ifm;
+	int err;
+	u8 pnaddr;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	ASSERT_RTNL();
+
+	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_phonet_policy);
+	if (err < 0)
+		return err;
+
+	ifm = nlmsg_data(nlh);
+	if (tb[IFA_LOCAL] == NULL)
+		return -EINVAL;
+	pnaddr = nla_get_u8(tb[IFA_LOCAL]);
+	if (pnaddr & 3)
+		/* Phonet addresses only have 6 high-order bits */
+		return -EINVAL;
+
+	dev = __dev_get_by_index(net, ifm->ifa_index);
+	if (dev == NULL)
+		return -ENODEV;
+
+	if (nlh->nlmsg_type == RTM_NEWADDR)
+		err = phonet_address_add(dev, pnaddr);
+	else
+		err = phonet_address_del(dev, pnaddr);
+	if (!err)
+		rtmsg_notify(nlh->nlmsg_type, dev, pnaddr);
+	return err;
+}
+
+static int fill_addr(struct sk_buff *skb, struct net_device *dev, u8 addr,
+			u32 pid, u32 seq, int event)
+{
+	struct ifaddrmsg *ifm;
+	struct nlmsghdr *nlh;
+
+	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), 0);
+	if (nlh == NULL)
+		return -EMSGSIZE;
+
+	ifm = nlmsg_data(nlh);
+	ifm->ifa_family = AF_PHONET;
+	ifm->ifa_prefixlen = 0;
+	ifm->ifa_flags = IFA_F_PERMANENT;
+	ifm->ifa_scope = RT_SCOPE_LINK;
+	ifm->ifa_index = dev->ifindex;
+	NLA_PUT_U8(skb, IFA_LOCAL, addr);
+	return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return -EMSGSIZE;
+}
+
+static int getaddr_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct phonet_device *pnd;
+	int dev_idx = 0, dev_start_idx = cb->args[0];
+	int addr_idx = 0, addr_start_idx = cb->args[1];
+
+	spin_lock_bh(&pndevs.lock);
+	list_for_each_entry(pnd, &pndevs.list, list) {
+		u8 addr;
+
+		if (dev_idx > dev_start_idx)
+			addr_start_idx = 0;
+		if (dev_idx++ < dev_start_idx)
+			continue;
+
+		addr_idx = 0;
+		for (addr = find_first_bit(pnd->addrs, 64); addr < 64;
+			addr = find_next_bit(pnd->addrs, 64, 1+addr)) {
+			if (addr_idx++ < addr_start_idx)
+				continue;
+
+			if (fill_addr(skb, pnd->netdev, addr << 2,
+					 NETLINK_CB(cb->skb).pid,
+					cb->nlh->nlmsg_seq, RTM_NEWADDR))
+				goto out;
+		}
+	}
+
+out:
+	spin_unlock_bh(&pndevs.lock);
+	cb->args[0] = dev_idx;
+	cb->args[1] = addr_idx;
+
+	return skb->len;
+}
+
+void __init phonet_netlink_register(void)
+{
+	rtnl_register(PF_PHONET, RTM_NEWADDR, addr_doit, NULL);
+	rtnl_register(PF_PHONET, RTM_DELADDR, addr_doit, NULL);
+	rtnl_register(PF_PHONET, RTM_GETADDR, NULL, getaddr_dumpit);
+}
diff --git a/net/phonet/socket.c b/net/phonet/socket.c
new file mode 100644
index 00000000000..d81740187fb
--- /dev/null
+++ b/net/phonet/socket.c
@@ -0,0 +1,411 @@
+/*
+ * File: socket.c
+ *
+ * Phonet sockets
+ *
+ * Copyright (C) 2008 Nokia Corporation.
+ *
+ * Contact: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
+ * Original author: Sakari Ailus <sakari.ailus@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/net.h>
+#include <linux/poll.h>
+#include <net/sock.h>
+#include <net/tcp_states.h>
+
+#include <linux/phonet.h>
+#include <net/phonet/phonet.h>
+#include <net/phonet/pep.h>
+#include <net/phonet/pn_dev.h>
+
+static int pn_socket_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+
+	if (sk) {
+		sock->sk = NULL;
+		sk->sk_prot->close(sk, 0);
+	}
+	return 0;
+}
+
+static struct  {
+	struct hlist_head hlist;
+	spinlock_t lock;
+} pnsocks = {
+	.hlist = HLIST_HEAD_INIT,
+	.lock = __SPIN_LOCK_UNLOCKED(pnsocks.lock),
+};
+
+/*
+ * Find address based on socket address, match only certain fields.
+ * Also grab sock if it was found. Remember to sock_put it later.
+ */
+struct sock *pn_find_sock_by_sa(const struct sockaddr_pn *spn)
+{
+	struct hlist_node *node;
+	struct sock *sknode;
+	struct sock *rval = NULL;
+	u16 obj = pn_sockaddr_get_object(spn);
+	u8 res = spn->spn_resource;
+
+	spin_lock_bh(&pnsocks.lock);
+
+	sk_for_each(sknode, node, &pnsocks.hlist) {
+		struct pn_sock *pn = pn_sk(sknode);
+		BUG_ON(!pn->sobject); /* unbound socket */
+
+		if (pn_port(obj)) {
+			/* Look up socket by port */
+			if (pn_port(pn->sobject) != pn_port(obj))
+				continue;
+		} else {
+			/* If port is zero, look up by resource */
+			if (pn->resource != res)
+				continue;
+		}
+		if (pn_addr(pn->sobject)
+		 && pn_addr(pn->sobject) != pn_addr(obj))
+			continue;
+
+		rval = sknode;
+		sock_hold(sknode);
+		break;
+	}
+
+	spin_unlock_bh(&pnsocks.lock);
+
+	return rval;
+
+}
+
+void pn_sock_hash(struct sock *sk)
+{
+	spin_lock_bh(&pnsocks.lock);
+	sk_add_node(sk, &pnsocks.hlist);
+	spin_unlock_bh(&pnsocks.lock);
+}
+EXPORT_SYMBOL(pn_sock_hash);
+
+void pn_sock_unhash(struct sock *sk)
+{
+	spin_lock_bh(&pnsocks.lock);
+	sk_del_node_init(sk);
+	spin_unlock_bh(&pnsocks.lock);
+}
+EXPORT_SYMBOL(pn_sock_unhash);
+
+static int pn_socket_bind(struct socket *sock, struct sockaddr *addr, int len)
+{
+	struct sock *sk = sock->sk;
+	struct pn_sock *pn = pn_sk(sk);
+	struct sockaddr_pn *spn = (struct sockaddr_pn *)addr;
+	int err;
+	u16 handle;
+	u8 saddr;
+
+	if (sk->sk_prot->bind)
+		return sk->sk_prot->bind(sk, addr, len);
+
+	if (len < sizeof(struct sockaddr_pn))
+		return -EINVAL;
+	if (spn->spn_family != AF_PHONET)
+		return -EAFNOSUPPORT;
+
+	handle = pn_sockaddr_get_object((struct sockaddr_pn *)addr);
+	saddr = pn_addr(handle);
+	if (saddr && phonet_address_lookup(saddr))
+		return -EADDRNOTAVAIL;
+
+	lock_sock(sk);
+	if (sk->sk_state != TCP_CLOSE || pn_port(pn->sobject)) {
+		err = -EINVAL; /* attempt to rebind */
+		goto out;
+	}
+	err = sk->sk_prot->get_port(sk, pn_port(handle));
+	if (err)
+		goto out;
+
+	/* get_port() sets the port, bind() sets the address if applicable */
+	pn->sobject = pn_object(saddr, pn_port(pn->sobject));
+	pn->resource = spn->spn_resource;
+
+	/* Enable RX on the socket */
+	sk->sk_prot->hash(sk);
+out:
+	release_sock(sk);
+	return err;
+}
+
+static int pn_socket_autobind(struct socket *sock)
+{
+	struct sockaddr_pn sa;
+	int err;
+
+	memset(&sa, 0, sizeof(sa));
+	sa.spn_family = AF_PHONET;
+	err = pn_socket_bind(sock, (struct sockaddr *)&sa,
+				sizeof(struct sockaddr_pn));
+	if (err != -EINVAL)
+		return err;
+	BUG_ON(!pn_port(pn_sk(sock->sk)->sobject));
+	return 0; /* socket was already bound */
+}
+
+static int pn_socket_accept(struct socket *sock, struct socket *newsock,
+				int flags)
+{
+	struct sock *sk = sock->sk;
+	struct sock *newsk;
+	int err;
+
+	newsk = sk->sk_prot->accept(sk, flags, &err);
+	if (!newsk)
+		return err;
+
+	lock_sock(newsk);
+	sock_graft(newsk, newsock);
+	newsock->state = SS_CONNECTED;
+	release_sock(newsk);
+	return 0;
+}
+
+static int pn_socket_getname(struct socket *sock, struct sockaddr *addr,
+				int *sockaddr_len, int peer)
+{
+	struct sock *sk = sock->sk;
+	struct pn_sock *pn = pn_sk(sk);
+
+	memset(addr, 0, sizeof(struct sockaddr_pn));
+	addr->sa_family = AF_PHONET;
+	if (!peer) /* Race with bind() here is userland's problem. */
+		pn_sockaddr_set_object((struct sockaddr_pn *)addr,
+					pn->sobject);
+
+	*sockaddr_len = sizeof(struct sockaddr_pn);
+	return 0;
+}
+
+static unsigned int pn_socket_poll(struct file *file, struct socket *sock,
+					poll_table *wait)
+{
+	struct sock *sk = sock->sk;
+	struct pep_sock *pn = pep_sk(sk);
+	unsigned int mask = 0;
+
+	poll_wait(file, &sock->wait, wait);
+
+	switch (sk->sk_state) {
+	case TCP_LISTEN:
+		return hlist_empty(&pn->ackq) ? 0 : POLLIN;
+	case TCP_CLOSE:
+		return POLLERR;
+	}
+
+	if (!skb_queue_empty(&sk->sk_receive_queue))
+		mask |= POLLIN | POLLRDNORM;
+	if (!skb_queue_empty(&pn->ctrlreq_queue))
+		mask |= POLLPRI;
+	if (!mask && sk->sk_state == TCP_CLOSE_WAIT)
+		return POLLHUP;
+
+	if (sk->sk_state == TCP_ESTABLISHED && pn->tx_credits)
+		mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
+
+	return mask;
+}
+
+static int pn_socket_ioctl(struct socket *sock, unsigned int cmd,
+				unsigned long arg)
+{
+	struct sock *sk = sock->sk;
+	struct pn_sock *pn = pn_sk(sk);
+
+	if (cmd == SIOCPNGETOBJECT) {
+		struct net_device *dev;
+		u16 handle;
+		u8 saddr;
+
+		if (get_user(handle, (__u16 __user *)arg))
+			return -EFAULT;
+
+		lock_sock(sk);
+		if (sk->sk_bound_dev_if)
+			dev = dev_get_by_index(sock_net(sk),
+						sk->sk_bound_dev_if);
+		else
+			dev = phonet_device_get(sock_net(sk));
+		if (dev && (dev->flags & IFF_UP))
+			saddr = phonet_address_get(dev, pn_addr(handle));
+		else
+			saddr = PN_NO_ADDR;
+		release_sock(sk);
+
+		if (dev)
+			dev_put(dev);
+		if (saddr == PN_NO_ADDR)
+			return -EHOSTUNREACH;
+
+		handle = pn_object(saddr, pn_port(pn->sobject));
+		return put_user(handle, (__u16 __user *)arg);
+	}
+
+	return sk->sk_prot->ioctl(sk, cmd, arg);
+}
+
+static int pn_socket_listen(struct socket *sock, int backlog)
+{
+	struct sock *sk = sock->sk;
+	int err = 0;
+
+	if (sock->state != SS_UNCONNECTED)
+		return -EINVAL;
+	if (pn_socket_autobind(sock))
+		return -ENOBUFS;
+
+	lock_sock(sk);
+	if (sk->sk_state != TCP_CLOSE) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	sk->sk_state = TCP_LISTEN;
+	sk->sk_ack_backlog = 0;
+	sk->sk_max_ack_backlog = backlog;
+out:
+	release_sock(sk);
+	return err;
+}
+
+static int pn_socket_sendmsg(struct kiocb *iocb, struct socket *sock,
+				struct msghdr *m, size_t total_len)
+{
+	struct sock *sk = sock->sk;
+
+	if (pn_socket_autobind(sock))
+		return -EAGAIN;
+
+	return sk->sk_prot->sendmsg(iocb, sk, m, total_len);
+}
+
+const struct proto_ops phonet_dgram_ops = {
+	.family		= AF_PHONET,
+	.owner		= THIS_MODULE,
+	.release	= pn_socket_release,
+	.bind		= pn_socket_bind,
+	.connect	= sock_no_connect,
+	.socketpair	= sock_no_socketpair,
+	.accept		= sock_no_accept,
+	.getname	= pn_socket_getname,
+	.poll		= datagram_poll,
+	.ioctl		= pn_socket_ioctl,
+	.listen		= sock_no_listen,
+	.shutdown	= sock_no_shutdown,
+	.setsockopt	= sock_no_setsockopt,
+	.getsockopt	= sock_no_getsockopt,
+#ifdef CONFIG_COMPAT
+	.compat_setsockopt = sock_no_setsockopt,
+	.compat_getsockopt = sock_no_getsockopt,
+#endif
+	.sendmsg	= pn_socket_sendmsg,
+	.recvmsg	= sock_common_recvmsg,
+	.mmap		= sock_no_mmap,
+	.sendpage	= sock_no_sendpage,
+};
+
+const struct proto_ops phonet_stream_ops = {
+	.family		= AF_PHONET,
+	.owner		= THIS_MODULE,
+	.release	= pn_socket_release,
+	.bind		= pn_socket_bind,
+	.connect	= sock_no_connect,
+	.socketpair	= sock_no_socketpair,
+	.accept		= pn_socket_accept,
+	.getname	= pn_socket_getname,
+	.poll		= pn_socket_poll,
+	.ioctl		= pn_socket_ioctl,
+	.listen		= pn_socket_listen,
+	.shutdown	= sock_no_shutdown,
+	.setsockopt	= sock_common_setsockopt,
+	.getsockopt	= sock_common_getsockopt,
+#ifdef CONFIG_COMPAT
+	.compat_setsockopt = compat_sock_common_setsockopt,
+	.compat_getsockopt = compat_sock_common_getsockopt,
+#endif
+	.sendmsg	= pn_socket_sendmsg,
+	.recvmsg	= sock_common_recvmsg,
+	.mmap		= sock_no_mmap,
+	.sendpage	= sock_no_sendpage,
+};
+EXPORT_SYMBOL(phonet_stream_ops);
+
+static DEFINE_MUTEX(port_mutex);
+
+/* allocate port for a socket */
+int pn_sock_get_port(struct sock *sk, unsigned short sport)
+{
+	static int port_cur;
+	struct pn_sock *pn = pn_sk(sk);
+	struct sockaddr_pn try_sa;
+	struct sock *tmpsk;
+
+	memset(&try_sa, 0, sizeof(struct sockaddr_pn));
+	try_sa.spn_family = AF_PHONET;
+
+	mutex_lock(&port_mutex);
+
+	if (!sport) {
+		/* search free port */
+		int port, pmin, pmax;
+
+		phonet_get_local_port_range(&pmin, &pmax);
+		for (port = pmin; port <= pmax; port++) {
+			port_cur++;
+			if (port_cur < pmin || port_cur > pmax)
+				port_cur = pmin;
+
+			pn_sockaddr_set_port(&try_sa, port_cur);
+			tmpsk = pn_find_sock_by_sa(&try_sa);
+			if (tmpsk == NULL) {
+				sport = port_cur;
+				goto found;
+			} else
+				sock_put(tmpsk);
+		}
+	} else {
+		/* try to find specific port */
+		pn_sockaddr_set_port(&try_sa, sport);
+		tmpsk = pn_find_sock_by_sa(&try_sa);
+		if (tmpsk == NULL)
+			/* No sock there! We can use that port... */
+			goto found;
+		else
+			sock_put(tmpsk);
+	}
+	mutex_unlock(&port_mutex);
+
+	/* the port must be in use already */
+	return -EADDRINUSE;
+
+found:
+	mutex_unlock(&port_mutex);
+	pn->sobject = pn_object(pn_addr(pn->sobject), sport);
+	return 0;
+}
+EXPORT_SYMBOL(pn_sock_get_port);
diff --git a/net/phonet/sysctl.c b/net/phonet/sysctl.c
new file mode 100644
index 00000000000..600a4309b8c
--- /dev/null
+++ b/net/phonet/sysctl.c
@@ -0,0 +1,113 @@
+/*
+ * File: sysctl.c
+ *
+ * Phonet /proc/sys/net/phonet interface implementation
+ *
+ * Copyright (C) 2008 Nokia Corporation.
+ *
+ * Contact: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/seqlock.h>
+#include <linux/sysctl.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+
+#define DYNAMIC_PORT_MIN	0x40
+#define DYNAMIC_PORT_MAX	0x7f
+
+static DEFINE_SEQLOCK(local_port_range_lock);
+static int local_port_range_min[2] = {0, 0};
+static int local_port_range_max[2] = {1023, 1023};
+static int local_port_range[2] = {DYNAMIC_PORT_MIN, DYNAMIC_PORT_MAX};
+static struct ctl_table_header *phonet_table_hrd;
+
+static void set_local_port_range(int range[2])
+{
+	write_seqlock(&local_port_range_lock);
+	local_port_range[0] = range[0];
+	local_port_range[1] = range[1];
+	write_sequnlock(&local_port_range_lock);
+}
+
+void phonet_get_local_port_range(int *min, int *max)
+{
+	unsigned seq;
+	do {
+		seq = read_seqbegin(&local_port_range_lock);
+		if (min)
+			*min = local_port_range[0];
+		if (max)
+			*max = local_port_range[1];
+	} while (read_seqretry(&local_port_range_lock, seq));
+}
+
+static int proc_local_port_range(ctl_table *table, int write, struct file *filp,
+				void __user *buffer,
+				size_t *lenp, loff_t *ppos)
+{
+	int ret;
+	int range[2] = {local_port_range[0], local_port_range[1]};
+	ctl_table tmp = {
+		.data = &range,
+		.maxlen = sizeof(range),
+		.mode = table->mode,
+		.extra1 = &local_port_range_min,
+		.extra2 = &local_port_range_max,
+	};
+
+	ret = proc_dointvec_minmax(&tmp, write, filp, buffer, lenp, ppos);
+
+	if (write && ret == 0) {
+		if (range[1] < range[0])
+			ret = -EINVAL;
+		else
+			set_local_port_range(range);
+	}
+
+	return ret;
+}
+
+static struct ctl_table phonet_table[] = {
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "local_port_range",
+		.data		= &local_port_range,
+		.maxlen		= sizeof(local_port_range),
+		.mode		= 0644,
+		.proc_handler	= &proc_local_port_range,
+		.strategy	= NULL,
+	},
+	{ .ctl_name = 0 }
+};
+
+struct ctl_path phonet_ctl_path[] = {
+	{ .procname = "net", .ctl_name = CTL_NET, },
+	{ .procname = "phonet", .ctl_name = CTL_UNNUMBERED, },
+	{ },
+};
+
+int __init phonet_sysctl_init(void)
+{
+	phonet_table_hrd = register_sysctl_paths(phonet_ctl_path, phonet_table);
+	return phonet_table_hrd == NULL ? -ENOMEM : 0;
+}
+
+void phonet_sysctl_exit(void)
+{
+	unregister_sysctl_table(phonet_table_hrd);
+}