linux/drivers/infiniband/core/addr.c

/*
 * Copyright (c) 2005 Voltaire Inc.  All rights reserved.
 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
 * Copyright (c) 2005 Intel Corporation.  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.
 */

#include <linux/mutex.h>
#include <linux/inetdevice.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <net/arp.h>
#include <net/neighbour.h>
#include <net/route.h>
#include <net/netevent.h>
#include <net/ipv6_stubs.h>
#include <net/ip6_route.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_cache.h>
#include <rdma/ib_sa.h>
#include <rdma/ib.h>
#include <rdma/rdma_netlink.h>
#include <net/netlink.h>

#include "core_priv.h"

struct addr_req { … };

static atomic_t ib_nl_addr_request_seq = …;

static DEFINE_SPINLOCK(lock);
static LIST_HEAD(req_list);
static struct workqueue_struct *addr_wq;

static const struct nla_policy ib_nl_addr_policy[LS_NLA_TYPE_MAX] = …;

static inline bool ib_nl_is_good_ip_resp(const struct nlmsghdr *nlh)
{ … }

static void ib_nl_process_good_ip_rsep(const struct nlmsghdr *nlh)
{ … }

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

static int ib_nl_ip_send_msg(struct rdma_dev_addr *dev_addr,
			     const void *daddr,
			     u32 seq, u16 family)
{ … }

int rdma_addr_size(const struct sockaddr *addr)
{ … }
EXPORT_SYMBOL(…);

int rdma_addr_size_in6(struct sockaddr_in6 *addr)
{ … }
EXPORT_SYMBOL(…);

int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr)
{ … }
EXPORT_SYMBOL(…);

/**
 * rdma_copy_src_l2_addr - Copy netdevice source addresses
 * @dev_addr:	Destination address pointer where to copy the addresses
 * @dev:	Netdevice whose source addresses to copy
 *
 * rdma_copy_src_l2_addr() copies source addresses from the specified netdevice.
 * This includes unicast address, broadcast address, device type and
 * interface index.
 */
void rdma_copy_src_l2_addr(struct rdma_dev_addr *dev_addr,
			   const struct net_device *dev)
{ … }
EXPORT_SYMBOL(…);

static struct net_device *
rdma_find_ndev_for_src_ip_rcu(struct net *net, const struct sockaddr *src_in)
{ … }

int rdma_translate_ip(const struct sockaddr *addr,
		      struct rdma_dev_addr *dev_addr)
{ … }
EXPORT_SYMBOL(…);

static void set_timeout(struct addr_req *req, unsigned long time)
{ … }

static void queue_req(struct addr_req *req)
{ … }

static int ib_nl_fetch_ha(struct rdma_dev_addr *dev_addr,
			  const void *daddr, u32 seq, u16 family)
{ … }

static int dst_fetch_ha(const struct dst_entry *dst,
			struct rdma_dev_addr *dev_addr,
			const void *daddr)
{ … }

static bool has_gateway(const struct dst_entry *dst, sa_family_t family)
{ … }

static int fetch_ha(const struct dst_entry *dst, struct rdma_dev_addr *dev_addr,
		    const struct sockaddr *dst_in, u32 seq)
{ … }

static int addr4_resolve(struct sockaddr *src_sock,
			 const struct sockaddr *dst_sock,
			 struct rdma_dev_addr *addr,
			 struct rtable **prt)
{ … }

#if IS_ENABLED(CONFIG_IPV6)
static int addr6_resolve(struct sockaddr *src_sock,
			 const struct sockaddr *dst_sock,
			 struct rdma_dev_addr *addr,
			 struct dst_entry **pdst)
{ … }
#else
static int addr6_resolve(struct sockaddr *src_sock,
			 const struct sockaddr *dst_sock,
			 struct rdma_dev_addr *addr,
			 struct dst_entry **pdst)
{
	return -EADDRNOTAVAIL;
}
#endif

static int addr_resolve_neigh(const struct dst_entry *dst,
			      const struct sockaddr *dst_in,
			      struct rdma_dev_addr *addr,
			      unsigned int ndev_flags,
			      u32 seq)
{ … }

static int copy_src_l2_addr(struct rdma_dev_addr *dev_addr,
			    const struct sockaddr *dst_in,
			    const struct dst_entry *dst,
			    const struct net_device *ndev)
{ … }

static int rdma_set_src_addr_rcu(struct rdma_dev_addr *dev_addr,
				 unsigned int *ndev_flags,
				 const struct sockaddr *dst_in,
				 const struct dst_entry *dst)
{ … }

static int set_addr_netns_by_gid_rcu(struct rdma_dev_addr *addr)
{ … }

static void rdma_addr_set_net_defaults(struct rdma_dev_addr *addr)
{ … }

static int addr_resolve(struct sockaddr *src_in,
			const struct sockaddr *dst_in,
			struct rdma_dev_addr *addr,
			bool resolve_neigh,
			bool resolve_by_gid_attr,
			u32 seq)
{ … }

static void process_one_req(struct work_struct *_work)
{ … }

int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr,
		    struct rdma_dev_addr *addr, unsigned long timeout_ms,
		    void (*callback)(int status, struct sockaddr *src_addr,
				     struct rdma_dev_addr *addr, void *context),
		    bool resolve_by_gid_attr, void *context)
{ … }
EXPORT_SYMBOL(…);

int roce_resolve_route_from_path(struct sa_path_rec *rec,
				 const struct ib_gid_attr *attr)
{ … }

/**
 * rdma_addr_cancel - Cancel resolve ip request
 * @addr:	Pointer to address structure given previously
 *		during rdma_resolve_ip().
 * rdma_addr_cancel() is synchronous function which cancels any pending
 * request if there is any.
 */
void rdma_addr_cancel(struct rdma_dev_addr *addr)
{ … }
EXPORT_SYMBOL(…);

struct resolve_cb_context { … };

static void resolve_cb(int status, struct sockaddr *src_addr,
	     struct rdma_dev_addr *addr, void *context)
{ … }

int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid,
				 const union ib_gid *dgid,
				 u8 *dmac, const struct ib_gid_attr *sgid_attr,
				 int *hoplimit)
{ … }

static int netevent_callback(struct notifier_block *self, unsigned long event,
	void *ctx)
{ … }

static struct notifier_block nb = …;

int addr_init(void)
{ … }

void addr_cleanup(void)
{ … }