/*
 * Copyright (C) 2011 Instituto Nokia de Tecnologia
 *
 * Authors:
 *    Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
 *    Lauro Ramos Venancio <lauro.venancio@openbossa.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#include <linux/nfc.h>
#include <linux/module.h>

#include "nfc.h"

static DEFINE_RWLOCK(proto_tab_lock);
static const struct nfc_protocol *proto_tab[NFC_SOCKPROTO_MAX];

static int nfc_sock_create(struct net *net, struct socket *sock, int proto,
			   int kern)
{
	int rc = -EPROTONOSUPPORT;

	if (net != &init_net)
		return -EAFNOSUPPORT;

	if (proto < 0 || proto >= NFC_SOCKPROTO_MAX)
		return -EINVAL;

	read_lock(&proto_tab_lock);
	if (proto_tab[proto] &&	try_module_get(proto_tab[proto]->owner)) {
		rc = proto_tab[proto]->create(net, sock, proto_tab[proto], kern);
		module_put(proto_tab[proto]->owner);
	}
	read_unlock(&proto_tab_lock);

	return rc;
}

static struct net_proto_family nfc_sock_family_ops = {
	.owner  = THIS_MODULE,
	.family = PF_NFC,
	.create = nfc_sock_create,
};

int nfc_proto_register(const struct nfc_protocol *nfc_proto)
{
	int rc;

	if (nfc_proto->id < 0 || nfc_proto->id >= NFC_SOCKPROTO_MAX)
		return -EINVAL;

	rc = proto_register(nfc_proto->proto, 0);
	if (rc)
		return rc;

	write_lock(&proto_tab_lock);
	if (proto_tab[nfc_proto->id])
		rc = -EBUSY;
	else
		proto_tab[nfc_proto->id] = nfc_proto;
	write_unlock(&proto_tab_lock);

	return rc;
}
EXPORT_SYMBOL(nfc_proto_register);

void nfc_proto_unregister(const struct nfc_protocol *nfc_proto)
{
	write_lock(&proto_tab_lock);
	proto_tab[nfc_proto->id] = NULL;
	write_unlock(&proto_tab_lock);

	proto_unregister(nfc_proto->proto);
}
EXPORT_SYMBOL(nfc_proto_unregister);

int __init af_nfc_init(void)
{
	return sock_register(&nfc_sock_family_ops);
}

void af_nfc_exit(void)
{
	sock_unregister(PF_NFC);
}
value='range'>range</option>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=c1b0789271b13dd7561f78370122c3183cd74ab0'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?id=c1b0789271b13dd7561f78370122c3183cd74ab0'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4?id=c1b0789271b13dd7561f78370122c3183cd74ab0'>ipv4</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='c1b0789271b13dd7561f78370122c3183cd74ab0'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-12-12 12:17:19 +0000</td></tr>
<tr><th>committer</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-12-12 12:17:19 +0000</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4?id=c1b0789271b13dd7561f78370122c3183cd74ab0'>c1b0789271b13dd7561f78370122c3183cd74ab0</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/ipv4?id=c1b0789271b13dd7561f78370122c3183cd74ab0'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c1b0789271b13dd7561f78370122c3183cd74ab0'>f4eda3db7bd1b059de81cd4bec7fbb871661dbe2</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/ipv4?id=c1b0789271b13dd7561f78370122c3183cd74ab0'>net/ipv4</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4?id=69973b830859bc6529a7a0468ba0d80ee5117826'>69973b830859bc6529a7a0468ba0d80ee5117826</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/ipv4?id=c1b0789271b13dd7561f78370122c3183cd74ab0&amp;id2=69973b830859bc6529a7a0468ba0d80ee5117826'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4?id=618c808968852609d2d9f0e5cfc351a4807ef8d0'>618c808968852609d2d9f0e5cfc351a4807ef8d0</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/ipv4?id=c1b0789271b13dd7561f78370122c3183cd74ab0&amp;id2=618c808968852609d2d9f0e5cfc351a4807ef8d0'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge remote-tracking branch 'regulator/fix/axp20x' into regulator-linus</div><div class='commit-msg'></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c1b0789271b13dd7561f78370122c3183cd74ab0'>Diffstat</a> (limited to 'net/ipv4')</div><table summary='diffstat' class='diffstat'>