linux/drivers/infiniband/core/netlink.c

/*
 * Copyright (c) 2017 Mellanox Technologies Inc.  All rights reserved.
 * Copyright (c) 2010 Voltaire Inc.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#define pr_fmt(fmt) …

#include <linux/export.h>
#include <net/netlink.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/sock.h>
#include <rdma/rdma_netlink.h>
#include <linux/module.h>
#include "core_priv.h"

static struct { … } rdma_nl_types[RDMA_NL_NUM_CLIENTS];

bool rdma_nl_chk_listeners(unsigned int group)
{ … }
EXPORT_SYMBOL(…);

static bool is_nl_msg_valid(unsigned int type, unsigned int op)
{ … }

static const struct rdma_nl_cbs *
get_cb_table(const struct sk_buff *skb, unsigned int type, unsigned int op)
{ … }

void rdma_nl_register(unsigned int index,
		      const struct rdma_nl_cbs cb_table[])
{ … }
EXPORT_SYMBOL(…);

void rdma_nl_unregister(unsigned int index)
{ … }
EXPORT_SYMBOL(…);

void *ibnl_put_msg(struct sk_buff *skb, struct nlmsghdr **nlh, int seq,
		   int len, int client, int op, int flags)
{ … }
EXPORT_SYMBOL(…);

int ibnl_put_attr(struct sk_buff *skb, struct nlmsghdr *nlh,
		  int len, void *data, int type)
{ … }
EXPORT_SYMBOL(…);

static int rdma_nl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
			   struct netlink_ext_ack *extack)
{ … }

/*
 * This function is similar to netlink_rcv_skb with one exception:
 * It calls to the callback for the netlink messages without NLM_F_REQUEST
 * flag. These messages are intended for RDMA_NL_LS consumer, so it is allowed
 * for that consumer only.
 */
static int rdma_nl_rcv_skb(struct sk_buff *skb, int (*cb)(struct sk_buff *,
						   struct nlmsghdr *,
						   struct netlink_ext_ack *))
{ … }

static void rdma_nl_rcv(struct sk_buff *skb)
{ … }

int rdma_nl_unicast(struct net *net, struct sk_buff *skb, u32 pid)
{ … }
EXPORT_SYMBOL(…);

int rdma_nl_unicast_wait(struct net *net, struct sk_buff *skb, __u32 pid)
{ … }
EXPORT_SYMBOL(…);

int rdma_nl_multicast(struct net *net, struct sk_buff *skb,
		      unsigned int group, gfp_t flags)
{ … }
EXPORT_SYMBOL(…);

void rdma_nl_init(void)
{ … }

void rdma_nl_exit(void)
{ … }

int rdma_nl_net_init(struct rdma_dev_net *rnet)
{ … }

void rdma_nl_net_exit(struct rdma_dev_net *rnet)
{ … }

MODULE_ALIAS_NET_PF_PROTO(…);