/*
 * 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);
}
thor</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/powerpc?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>powerpc</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'/><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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-12 21:58:13 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-12 21:58:13 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/powerpc?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/powerpc?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>f63906f41699c8e38af9d12b063e2ceab0286ef2</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/powerpc?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>Documentation/powerpc</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/powerpc?id=e34bac726d27056081d0250c0e173e4b155aa340'>e34bac726d27056081d0250c0e173e4b155aa340</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/powerpc?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba&amp;id2=e34bac726d27056081d0250c0e173e4b155aa340'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/powerpc?id=868c97a846a73e937d835b09b8c885a69df50ec8'>868c97a846a73e937d835b09b8c885a69df50ec8</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/powerpc?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba&amp;id2=868c97a846a73e937d835b09b8c885a69df50ec8'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'docs-4.10' of git://git.lwn.net/linux<span class='decoration'><a class='deco' href='/cgit.cgi/linux/net-next.git/commit/Documentation/powerpc?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>HEAD</a><a class='branch-deco' href='/cgit.cgi/linux/net-next.git/log/Documentation/powerpc'>master</a></span></div><div class='commit-msg'>Pull documentation update from Jonathan Corbet:
 "These are the documentation changes for 4.10.

  It's another busy cycle for the docs tree, as the sphinx conversion
  continues. Highlights include:

   - Further work on PDF output, which remains a bit of a pain but
     should be more solid now.

   - Five more DocBook template files converted to Sphinx. Only 27 to
     go... Lots of plain-text files have also been converted and
     integrated.

   - Images in binary formats have been replaced with more
     source-friendly versions.

   - Various bits of organizational work, including the renaming of
     various files discussed at the kernel summit.

   - New documentation for the device_link mechanism.

  ... and, of course, lots of typo fixes and small updates"

* tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits)
  dma-buf: Extract dma-buf.rst
  Update Documentation/00-INDEX
  docs: 00-INDEX: document directories/files with no docs
  docs: 00-INDEX: remove non-existing entries
  docs: 00-INDEX: add missing entries for documentation files/dirs
  docs: 00-INDEX: consolidate process/ and admin-guide/ description
  scripts: add a script to check if Documentation/00-INDEX is sane
  Docs: change sh -&gt; awk in REPORTING-BUGS
  Documentation/core-api/device_link: Add initial documentation
  core-api: remove an unexpected unident
  ppc/idle: Add documentation for powersave=off
  Doc: Correct typo, "Introdution" =&gt; "Introduction"
  Documentation/atomic_ops.txt: convert to ReST markup
  Documentation/local_ops.txt: convert to ReST markup
  Documentation/assoc_array.txt: convert to ReST markup
  docs-rst: parse-headers.pl: cleanup the documentation
  docs-rst: fix media cleandocs target
  docs-rst: media/Makefile: reorganize the rules
  docs-rst: media: build SVG from graphviz files
  docs-rst: replace bayer.png by a SVG image
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>Diffstat</a> (limited to 'Documentation/powerpc')</div><table summary='diffstat' class='diffstat'>