cregit-Linux how code gets into the kernel

Release 4.11 net/nfc/af_nfc.c

Directory: net/nfc
/*
 * 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; }

Contributors

PersonTokensPropCommitsCommitProp
Aloisio Almeida Jr11698.31%150.00%
Eric W. Biedermann21.69%150.00%
Total118100.00%2100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Aloisio Almeida Jr89100.00%1100.00%
Total89100.00%1100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Aloisio Almeida Jr39100.00%1100.00%
Total39100.00%1100.00%

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

Contributors

PersonTokensPropCommitsCommitProp
Aloisio Almeida Jr15100.00%1100.00%
Total15100.00%1100.00%


void af_nfc_exit(void) { sock_unregister(PF_NFC); }

Contributors

PersonTokensPropCommitsCommitProp
Aloisio Almeida Jr12100.00%1100.00%
Total12100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Aloisio Almeida Jr32598.19%125.00%
Paul Gortmaker30.91%125.00%
Eric W. Biedermann20.60%125.00%
Jeff Kirsher10.30%125.00%
Total331100.00%4100.00%
Directory: net/nfc
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