[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / phonet / socket.c

/*
 * 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(struct net *net, 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 (!net_eq(sock_net(sknode), net))
			continue;
		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(sock_net(sk), 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 && atomic_read(&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 net *net = sock_net(sk);
	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(net, &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(net, &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);

static struct sock *pn_sock_get_idx(struct seq_file *seq, loff_t pos)
{
	struct net *net = seq_file_net(seq);
	struct hlist_node *node;
	struct sock *sknode;

	sk_for_each(sknode, node, &pnsocks.hlist) {
		if (!net_eq(net, sock_net(sknode)))
			continue;
		if (!pos)
			return sknode;
		pos--;
	}
	return NULL;
}

static struct sock *pn_sock_get_next(struct seq_file *seq, struct sock *sk)
{
	struct net *net = seq_file_net(seq);

	do
		sk = sk_next(sk);
	while (sk && !net_eq(net, sock_net(sk)));

	return sk;
}

static void *pn_sock_seq_start(struct seq_file *seq, loff_t *pos)
	__acquires(pnsocks.lock)
{
	spin_lock_bh(&pnsocks.lock);
	return *pos ? pn_sock_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
}

static void *pn_sock_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct sock *sk;

	if (v == SEQ_START_TOKEN)
		sk = pn_sock_get_idx(seq, 0);
	else
		sk = pn_sock_get_next(seq, v);
	(*pos)++;
	return sk;
}

static void pn_sock_seq_stop(struct seq_file *seq, void *v)
	__releases(pnsocks.lock)
{
	spin_unlock_bh(&pnsocks.lock);
}

static int pn_sock_seq_show(struct seq_file *seq, void *v)
{
	int len;

	if (v == SEQ_START_TOKEN)
		seq_printf(seq, "%s%n", "pt  loc  rem rs st tx_queue rx_queue "
			"  uid inode ref pointer drops", &len);
	else {
		struct sock *sk = v;
		struct pn_sock *pn = pn_sk(sk);

		seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu "
			"%d %p %d%n",
			sk->sk_protocol, pn->sobject, 0, pn->resource,
			sk->sk_state,
			sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk),
			sock_i_uid(sk), sock_i_ino(sk),
			atomic_read(&sk->sk_refcnt), sk,
			atomic_read(&sk->sk_drops), &len);
	}
	seq_printf(seq, "%*s\n", 127 - len, "");
	return 0;
}

static const struct seq_operations pn_sock_seq_ops = {
	.start = pn_sock_seq_start,
	.next = pn_sock_seq_next,
	.stop = pn_sock_seq_stop,
	.show = pn_sock_seq_show,
};

static int pn_sock_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &pn_sock_seq_ops);
}

const struct file_operations pn_sock_seq_fops = {
	.owner = THIS_MODULE,
	.open = pn_sock_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = seq_release,
};
Commit	Line	Data
ba113a94 RDC	1	/*
	2	* File: socket.c
	3	*
	4	* Phonet sockets
	5	*
	6	* Copyright (C) 2008 Nokia Corporation.
	7	*
	8	* Contact: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
	9	* Original author: Sakari Ailus <sakari.ailus@nokia.com>
	10	*
	11	* This program is free software; you can redistribute it and/or
	12	* modify it under the terms of the GNU General Public License
	13	* version 2 as published by the Free Software Foundation.
	14	*
	15	* This program is distributed in the hope that it will be useful, but
	16	* WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	* General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	23	* 02110-1301 USA
	24	*/
	25
	26	#include <linux/kernel.h>
	27	#include <linux/net.h>
9995a32b	28	#include <linux/poll.h>
ba113a94 RDC	29	#include <net/sock.h>
	30	#include <net/tcp_states.h>
	31
	32	#include <linux/phonet.h>
	33	#include <net/phonet/phonet.h>
9995a32b	34	#include <net/phonet/pep.h>
ba113a94 RDC	35	#include <net/phonet/pn_dev.h>
	36
	37	static int pn_socket_release(struct socket *sock)
	38	{
	39	struct sock *sk = sock->sk;
	40
	41	if (sk) {
	42	sock->sk = NULL;
	43	sk->sk_prot->close(sk, 0);
	44	}
	45	return 0;
	46	}
	47
	48	static struct {
	49	struct hlist_head hlist;
	50	spinlock_t lock;
	51	} pnsocks = {
	52	.hlist = HLIST_HEAD_INIT,
	53	.lock = __SPIN_LOCK_UNLOCKED(pnsocks.lock),
	54	};
	55
	56	/*
	57	* Find address based on socket address, match only certain fields.
	58	* Also grab sock if it was found. Remember to sock_put it later.
	59	*/
52404881	60	struct sock pn_find_sock_by_sa(struct net net, const struct sockaddr_pn *spn)
ba113a94 RDC	61	{
	62	struct hlist_node *node;
	63	struct sock *sknode;
	64	struct sock *rval = NULL;
	65	u16 obj = pn_sockaddr_get_object(spn);
	66	u8 res = spn->spn_resource;
	67
	68	spin_lock_bh(&pnsocks.lock);
	69
	70	sk_for_each(sknode, node, &pnsocks.hlist) {
	71	struct pn_sock *pn = pn_sk(sknode);
	72	BUG_ON(!pn->sobject); /* unbound socket */
	73
52404881 RDC	74	if (!net_eq(sock_net(sknode), net))
52404881 RDC	75	continue;
ba113a94 RDC	76	if (pn_port(obj)) {
	77	/* Look up socket by port */
	78	if (pn_port(pn->sobject) != pn_port(obj))
	79	continue;
	80	} else {
	81	/* If port is zero, look up by resource */
	82	if (pn->resource != res)
	83	continue;
	84	}
	85	if (pn_addr(pn->sobject)
	86	&& pn_addr(pn->sobject) != pn_addr(obj))
	87	continue;
	88
	89	rval = sknode;
	90	sock_hold(sknode);
	91	break;
	92	}
	93
	94	spin_unlock_bh(&pnsocks.lock);
	95
	96	return rval;
	97
	98	}
	99
	100	void pn_sock_hash(struct sock *sk)
	101	{
	102	spin_lock_bh(&pnsocks.lock);
	103	sk_add_node(sk, &pnsocks.hlist);
	104	spin_unlock_bh(&pnsocks.lock);
	105	}
	106	EXPORT_SYMBOL(pn_sock_hash);
	107
	108	void pn_sock_unhash(struct sock *sk)
	109	{
	110	spin_lock_bh(&pnsocks.lock);
	111	sk_del_node_init(sk);
	112	spin_unlock_bh(&pnsocks.lock);
	113	}
	114	EXPORT_SYMBOL(pn_sock_unhash);
	115
	116	static int pn_socket_bind(struct socket sock, struct sockaddr addr, int len)
	117	{
	118	struct sock *sk = sock->sk;
	119	struct pn_sock *pn = pn_sk(sk);
	120	struct sockaddr_pn spn = (struct sockaddr_pn )addr;
	121	int err;
	122	u16 handle;
	123	u8 saddr;
	124
	125	if (sk->sk_prot->bind)
	126	return sk->sk_prot->bind(sk, addr, len);
	127
	128	if (len < sizeof(struct sockaddr_pn))
	129	return -EINVAL;
	130	if (spn->spn_family != AF_PHONET)
	131	return -EAFNOSUPPORT;
	132
	133	handle = pn_sockaddr_get_object((struct sockaddr_pn *)addr);
	134	saddr = pn_addr(handle);
52404881	135	if (saddr && phonet_address_lookup(sock_net(sk), saddr))
ba113a94 RDC	136	return -EADDRNOTAVAIL;
	137
	138	lock_sock(sk);
	139	if (sk->sk_state != TCP_CLOSE \|\| pn_port(pn->sobject)) {
	140	err = -EINVAL; /* attempt to rebind */
	141	goto out;
	142	}
	143	err = sk->sk_prot->get_port(sk, pn_port(handle));
	144	if (err)
	145	goto out;
	146
	147	/* get_port() sets the port, bind() sets the address if applicable */
	148	pn->sobject = pn_object(saddr, pn_port(pn->sobject));
	149	pn->resource = spn->spn_resource;
	150
	151	/* Enable RX on the socket */
	152	sk->sk_prot->hash(sk);
	153	out:
	154	release_sock(sk);
	155	return err;
	156	}
	157
	158	static int pn_socket_autobind(struct socket *sock)
	159	{
	160	struct sockaddr_pn sa;
	161	int err;
	162
	163	memset(&sa, 0, sizeof(sa));
	164	sa.spn_family = AF_PHONET;
	165	err = pn_socket_bind(sock, (struct sockaddr *)&sa,
	166	sizeof(struct sockaddr_pn));
	167	if (err != -EINVAL)
	168	return err;
	169	BUG_ON(!pn_port(pn_sk(sock->sk)->sobject));
	170	return 0; /* socket was already bound */
	171	}
	172
9995a32b RDC	173	static int pn_socket_accept(struct socket sock, struct socket newsock,
	174	int flags)
	175	{
	176	struct sock *sk = sock->sk;
	177	struct sock *newsk;
	178	int err;
	179
	180	newsk = sk->sk_prot->accept(sk, flags, &err);
	181	if (!newsk)
	182	return err;
	183
	184	lock_sock(newsk);
	185	sock_graft(newsk, newsock);
	186	newsock->state = SS_CONNECTED;
	187	release_sock(newsk);
	188	return 0;
	189	}
	190
ba113a94 RDC	191	static int pn_socket_getname(struct socket sock, struct sockaddr addr,
	192	int *sockaddr_len, int peer)
	193	{
	194	struct sock *sk = sock->sk;
	195	struct pn_sock *pn = pn_sk(sk);
	196
	197	memset(addr, 0, sizeof(struct sockaddr_pn));
	198	addr->sa_family = AF_PHONET;
	199	if (!peer) /* Race with bind() here is userland's problem. */
	200	pn_sockaddr_set_object((struct sockaddr_pn *)addr,
	201	pn->sobject);
	202
	203	*sockaddr_len = sizeof(struct sockaddr_pn);
	204	return 0;
	205	}
	206
9995a32b RDC	207	static unsigned int pn_socket_poll(struct file file, struct socket sock,
	208	poll_table *wait)
	209	{
	210	struct sock *sk = sock->sk;
	211	struct pep_sock *pn = pep_sk(sk);
	212	unsigned int mask = 0;
	213
	214	poll_wait(file, &sock->wait, wait);
	215
	216	switch (sk->sk_state) {
	217	case TCP_LISTEN:
	218	return hlist_empty(&pn->ackq) ? 0 : POLLIN;
	219	case TCP_CLOSE:
	220	return POLLERR;
	221	}
	222
	223	if (!skb_queue_empty(&sk->sk_receive_queue))
	224	mask \|= POLLIN \| POLLRDNORM;
c41bd97f RDC	225	if (!skb_queue_empty(&pn->ctrlreq_queue))
	226	mask \|= POLLPRI;
	227	if (!mask && sk->sk_state == TCP_CLOSE_WAIT)
9995a32b RDC	228	return POLLHUP;
9995a32b RDC	229
be677730	230	if (sk->sk_state == TCP_ESTABLISHED && atomic_read(&pn->tx_credits))
9995a32b RDC	231	mask \|= POLLOUT \| POLLWRNORM \| POLLWRBAND;
	232
	233	return mask;
	234	}
	235
ba113a94 RDC	236	static int pn_socket_ioctl(struct socket *sock, unsigned int cmd,
	237	unsigned long arg)
	238	{
	239	struct sock *sk = sock->sk;
	240	struct pn_sock *pn = pn_sk(sk);
	241
	242	if (cmd == SIOCPNGETOBJECT) {
	243	struct net_device *dev;
	244	u16 handle;
	245	u8 saddr;
	246
	247	if (get_user(handle, (__u16 __user *)arg))
	248	return -EFAULT;
	249
	250	lock_sock(sk);
	251	if (sk->sk_bound_dev_if)
	252	dev = dev_get_by_index(sock_net(sk),
	253	sk->sk_bound_dev_if);
	254	else
	255	dev = phonet_device_get(sock_net(sk));
	256	if (dev && (dev->flags & IFF_UP))
	257	saddr = phonet_address_get(dev, pn_addr(handle));
	258	else
	259	saddr = PN_NO_ADDR;
	260	release_sock(sk);
	261
	262	if (dev)
	263	dev_put(dev);
	264	if (saddr == PN_NO_ADDR)
	265	return -EHOSTUNREACH;
	266
	267	handle = pn_object(saddr, pn_port(pn->sobject));
	268	return put_user(handle, (__u16 __user *)arg);
	269	}
	270
	271	return sk->sk_prot->ioctl(sk, cmd, arg);
	272	}
	273
9995a32b RDC	274	static int pn_socket_listen(struct socket *sock, int backlog)
	275	{
	276	struct sock *sk = sock->sk;
	277	int err = 0;
	278
	279	if (sock->state != SS_UNCONNECTED)
	280	return -EINVAL;
	281	if (pn_socket_autobind(sock))
	282	return -ENOBUFS;
	283
	284	lock_sock(sk);
	285	if (sk->sk_state != TCP_CLOSE) {
	286	err = -EINVAL;
	287	goto out;
	288	}
	289
	290	sk->sk_state = TCP_LISTEN;
	291	sk->sk_ack_backlog = 0;
	292	sk->sk_max_ack_backlog = backlog;
	293	out:
	294	release_sock(sk);
	295	return err;
	296	}
	297
ba113a94 RDC	298	static int pn_socket_sendmsg(struct kiocb iocb, struct socket sock,
	299	struct msghdr *m, size_t total_len)
	300	{
	301	struct sock *sk = sock->sk;
	302
	303	if (pn_socket_autobind(sock))
	304	return -EAGAIN;
	305
	306	return sk->sk_prot->sendmsg(iocb, sk, m, total_len);
	307	}
	308
	309	const struct proto_ops phonet_dgram_ops = {
	310	.family = AF_PHONET,
	311	.owner = THIS_MODULE,
	312	.release = pn_socket_release,
	313	.bind = pn_socket_bind,
	314	.connect = sock_no_connect,
	315	.socketpair = sock_no_socketpair,
	316	.accept = sock_no_accept,
	317	.getname = pn_socket_getname,
	318	.poll = datagram_poll,
	319	.ioctl = pn_socket_ioctl,
	320	.listen = sock_no_listen,
	321	.shutdown = sock_no_shutdown,
	322	.setsockopt = sock_no_setsockopt,
	323	.getsockopt = sock_no_getsockopt,
	324	#ifdef CONFIG_COMPAT
	325	.compat_setsockopt = sock_no_setsockopt,
	326	.compat_getsockopt = sock_no_getsockopt,
	327	#endif
	328	.sendmsg = pn_socket_sendmsg,
	329	.recvmsg = sock_common_recvmsg,
	330	.mmap = sock_no_mmap,
	331	.sendpage = sock_no_sendpage,
	332	};
	333
9995a32b RDC	334	const struct proto_ops phonet_stream_ops = {
	335	.family = AF_PHONET,
	336	.owner = THIS_MODULE,
	337	.release = pn_socket_release,
	338	.bind = pn_socket_bind,
	339	.connect = sock_no_connect,
	340	.socketpair = sock_no_socketpair,
	341	.accept = pn_socket_accept,
	342	.getname = pn_socket_getname,
	343	.poll = pn_socket_poll,
	344	.ioctl = pn_socket_ioctl,
	345	.listen = pn_socket_listen,
	346	.shutdown = sock_no_shutdown,
02a47617 RDC	347	.setsockopt = sock_common_setsockopt,
02a47617 RDC	348	.getsockopt = sock_common_getsockopt,
9995a32b	349	#ifdef CONFIG_COMPAT
02a47617 RDC	350	.compat_setsockopt = compat_sock_common_setsockopt,
02a47617 RDC	351	.compat_getsockopt = compat_sock_common_getsockopt,
9995a32b RDC	352	#endif
	353	.sendmsg = pn_socket_sendmsg,
	354	.recvmsg = sock_common_recvmsg,
	355	.mmap = sock_no_mmap,
	356	.sendpage = sock_no_sendpage,
	357	};
	358	EXPORT_SYMBOL(phonet_stream_ops);
	359
ba113a94 RDC	360	static DEFINE_MUTEX(port_mutex);
	361
	362	/* allocate port for a socket */
	363	int pn_sock_get_port(struct sock *sk, unsigned short sport)
	364	{
	365	static int port_cur;
52404881	366	struct net *net = sock_net(sk);
ba113a94 RDC	367	struct pn_sock *pn = pn_sk(sk);
	368	struct sockaddr_pn try_sa;
	369	struct sock *tmpsk;
	370
	371	memset(&try_sa, 0, sizeof(struct sockaddr_pn));
	372	try_sa.spn_family = AF_PHONET;
	373
	374	mutex_lock(&port_mutex);
	375
	376	if (!sport) {
	377	/* search free port */
87ab4e20	378	int port, pmin, pmax;
ba113a94	379
87ab4e20	380	phonet_get_local_port_range(&pmin, &pmax);
ba113a94 RDC	381	for (port = pmin; port <= pmax; port++) {
	382	port_cur++;
	383	if (port_cur < pmin \|\| port_cur > pmax)
	384	port_cur = pmin;
	385
	386	pn_sockaddr_set_port(&try_sa, port_cur);
52404881	387	tmpsk = pn_find_sock_by_sa(net, &try_sa);
ba113a94 RDC	388	if (tmpsk == NULL) {
	389	sport = port_cur;
	390	goto found;
	391	} else
	392	sock_put(tmpsk);
	393	}
	394	} else {
	395	/* try to find specific port */
	396	pn_sockaddr_set_port(&try_sa, sport);
52404881	397	tmpsk = pn_find_sock_by_sa(net, &try_sa);
ba113a94 RDC	398	if (tmpsk == NULL)
	399	/* No sock there! We can use that port... */
	400	goto found;
	401	else
	402	sock_put(tmpsk);
	403	}
	404	mutex_unlock(&port_mutex);
	405
	406	/* the port must be in use already */
	407	return -EADDRINUSE;
	408
	409	found:
	410	mutex_unlock(&port_mutex);
	411	pn->sobject = pn_object(pn_addr(pn->sobject), sport);
	412	return 0;
	413	}
	414	EXPORT_SYMBOL(pn_sock_get_port);
c1dc13e9 RDC	415
	416	static struct sock pn_sock_get_idx(struct seq_file seq, loff_t pos)
	417	{
	418	struct net *net = seq_file_net(seq);
	419	struct hlist_node *node;
	420	struct sock *sknode;
	421
	422	sk_for_each(sknode, node, &pnsocks.hlist) {
	423	if (!net_eq(net, sock_net(sknode)))
	424	continue;
	425	if (!pos)
	426	return sknode;
	427	pos--;
	428	}
	429	return NULL;
	430	}
	431
	432	static struct sock pn_sock_get_next(struct seq_file seq, struct sock *sk)
	433	{
	434	struct net *net = seq_file_net(seq);
	435
	436	do
	437	sk = sk_next(sk);
	438	while (sk && !net_eq(net, sock_net(sk)));
	439
	440	return sk;
	441	}
	442
	443	static void pn_sock_seq_start(struct seq_file seq, loff_t *pos)
	444	__acquires(pnsocks.lock)
	445	{
	446	spin_lock_bh(&pnsocks.lock);
	447	return pos ? pn_sock_get_idx(seq, pos - 1) : SEQ_START_TOKEN;
	448	}
	449
	450	static void pn_sock_seq_next(struct seq_file seq, void v, loff_t pos)
	451	{
	452	struct sock *sk;
	453
	454	if (v == SEQ_START_TOKEN)
	455	sk = pn_sock_get_idx(seq, 0);
	456	else
	457	sk = pn_sock_get_next(seq, v);
	458	(*pos)++;
	459	return sk;
	460	}
	461
	462	static void pn_sock_seq_stop(struct seq_file seq, void v)
	463	__releases(pnsocks.lock)
	464	{
	465	spin_unlock_bh(&pnsocks.lock);
	466	}
	467
	468	static int pn_sock_seq_show(struct seq_file seq, void v)
	469	{
	470	int len;
	471
	472	if (v == SEQ_START_TOKEN)
	473	seq_printf(seq, "%s%n", "pt loc rem rs st tx_queue rx_queue "
	474	" uid inode ref pointer drops", &len);
	475	else {
	476	struct sock *sk = v;
	477	struct pn_sock *pn = pn_sk(sk);
	478
479	seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu "
480	"%d %p %d%n",
481	sk->sk_protocol, pn->sobject, 0, pn->resource,
482	sk->sk_state,
483	sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk),
484	sock_i_uid(sk), sock_i_ino(sk),
485	atomic_read(&sk->sk_refcnt), sk,
486	atomic_read(&sk->sk_drops), &len);
487	}
488	seq_printf(seq, "%*s\n", 127 - len, "");
489	return 0;
490	}
491
492	static const struct seq_operations pn_sock_seq_ops = {
493	.start = pn_sock_seq_start,
494	.next = pn_sock_seq_next,
495	.stop = pn_sock_seq_stop,
496	.show = pn_sock_seq_show,
497	};
498
499	static int pn_sock_open(struct inode inode, struct file file)
500	{
501	return seq_open(file, &pn_sock_seq_ops);
502	}
503
504	const struct file_operations pn_sock_seq_fops = {
505	.owner = THIS_MODULE,
506	.open = pn_sock_open,
507	.read = seq_read,
508	.llseek = seq_lseek,
509	.release = seq_release,
510	};