2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
* operating system. INET is implemented using the BSD Socket
|
|
* interface as the means of communication with the user level.
|
|
*
|
|
* INET protocol dispatch tables.
|
|
*
|
|
* Authors: Ross Biro
|
|
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
|
|
*
|
|
* Fixes:
|
|
* Alan Cox : Ahah! udp icmp errors don't work because
|
|
* udp_err is never called!
|
|
* Alan Cox : Added new fields for init and ready for
|
|
* proper fragmentation (_NO_ 4K limits!)
|
|
* Richard Colella : Hang on hash collision
|
|
* Vince Laviano : Modified inet_del_protocol() to correctly
|
|
* maintain copy bit.
|
|
*/
|
|
#include <linux/cache.h>
|
|
#include <linux/module.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/spinlock.h>
|
|
#include <net/protocol.h>
|
|
|
|
struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS] __read_mostly;
|
|
EXPORT_SYMBOL(inet_protos);
|
|
const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS] __read_mostly;
|
|
EXPORT_SYMBOL(inet_offloads);
|
|
|
|
int inet_add_protocol(const struct net_protocol *prot, unsigned char protocol)
|
|
{
|
|
if (!prot->netns_ok) {
|
|
pr_err("Protocol %u is not namespace aware, cannot register.\n",
|
|
protocol);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return !cmpxchg((const struct net_protocol **)&inet_protos[protocol],
|
|
NULL, prot) ? 0 : -1;
|
|
}
|
|
EXPORT_SYMBOL(inet_add_protocol);
|
|
|
|
int inet_add_offload(const struct net_offload *prot, unsigned char protocol)
|
|
{
|
|
return !cmpxchg((const struct net_offload **)&inet_offloads[protocol],
|
|
NULL, prot) ? 0 : -1;
|
|
}
|
|
EXPORT_SYMBOL(inet_add_offload);
|
|
|
|
int inet_del_protocol(const struct net_protocol *prot, unsigned char protocol)
|
|
{
|
|
int ret;
|
|
|
|
ret = (cmpxchg((const struct net_protocol **)&inet_protos[protocol],
|
|
prot, NULL) == prot) ? 0 : -1;
|
|
|
|
synchronize_net();
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(inet_del_protocol);
|
|
|
|
int inet_del_offload(const struct net_offload *prot, unsigned char protocol)
|
|
{
|
|
int ret;
|
|
|
|
ret = (cmpxchg((const struct net_offload **)&inet_offloads[protocol],
|
|
prot, NULL) == prot) ? 0 : -1;
|
|
|
|
synchronize_net();
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(inet_del_offload);
|