Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005 Voltaire Inc. All rights reserved. |
| 3 | * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. |
| 4 | * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. |
| 5 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
| 6 | * |
Sean Hefty | a947491 | 2008-07-14 23:48:43 -0700 | [diff] [blame] | 7 | * This software is available to you under a choice of one of two |
| 8 | * licenses. You may choose to be licensed under the terms of the GNU |
| 9 | * General Public License (GPL) Version 2, available from the file |
| 10 | * COPYING in the main directory of this source tree, or the |
| 11 | * OpenIB.org BSD license below: |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 12 | * |
Sean Hefty | a947491 | 2008-07-14 23:48:43 -0700 | [diff] [blame] | 13 | * Redistribution and use in source and binary forms, with or |
| 14 | * without modification, are permitted provided that the following |
| 15 | * conditions are met: |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 16 | * |
Sean Hefty | a947491 | 2008-07-14 23:48:43 -0700 | [diff] [blame] | 17 | * - Redistributions of source code must retain the above |
| 18 | * copyright notice, this list of conditions and the following |
| 19 | * disclaimer. |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 20 | * |
Sean Hefty | a947491 | 2008-07-14 23:48:43 -0700 | [diff] [blame] | 21 | * - Redistributions in binary form must reproduce the above |
| 22 | * copyright notice, this list of conditions and the following |
| 23 | * disclaimer in the documentation and/or other materials |
| 24 | * provided with the distribution. |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 25 | * |
Sean Hefty | a947491 | 2008-07-14 23:48:43 -0700 | [diff] [blame] | 26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 33 | * SOFTWARE. |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 34 | */ |
| 35 | |
| 36 | #include <linux/mutex.h> |
| 37 | #include <linux/inetdevice.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 38 | #include <linux/slab.h> |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 39 | #include <linux/workqueue.h> |
Paul Gortmaker | e4dd23d | 2011-05-27 15:35:46 -0400 | [diff] [blame] | 40 | #include <linux/module.h> |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 41 | #include <net/arp.h> |
| 42 | #include <net/neighbour.h> |
| 43 | #include <net/route.h> |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 44 | #include <net/netevent.h> |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 45 | #include <net/addrconf.h> |
| 46 | #include <net/ip6_route.h> |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 47 | #include <rdma/ib_addr.h> |
Sean Hefty | ef56086 | 2013-05-29 10:09:10 -0700 | [diff] [blame] | 48 | #include <rdma/ib.h> |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 49 | |
| 50 | MODULE_AUTHOR("Sean Hefty"); |
| 51 | MODULE_DESCRIPTION("IB Address Translation"); |
| 52 | MODULE_LICENSE("Dual BSD/GPL"); |
| 53 | |
| 54 | struct addr_req { |
| 55 | struct list_head list; |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 56 | struct sockaddr_storage src_addr; |
| 57 | struct sockaddr_storage dst_addr; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 58 | struct rdma_dev_addr *addr; |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 59 | struct rdma_addr_client *client; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 60 | void *context; |
| 61 | void (*callback)(int status, struct sockaddr *src_addr, |
| 62 | struct rdma_dev_addr *addr, void *context); |
| 63 | unsigned long timeout; |
| 64 | int status; |
| 65 | }; |
| 66 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 67 | static void process_req(struct work_struct *work); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 68 | |
| 69 | static DEFINE_MUTEX(lock); |
| 70 | static LIST_HEAD(req_list); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 71 | static DECLARE_DELAYED_WORK(work, process_req); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 72 | static struct workqueue_struct *addr_wq; |
| 73 | |
Sean Hefty | ef56086 | 2013-05-29 10:09:10 -0700 | [diff] [blame] | 74 | int rdma_addr_size(struct sockaddr *addr) |
| 75 | { |
| 76 | switch (addr->sa_family) { |
| 77 | case AF_INET: |
| 78 | return sizeof(struct sockaddr_in); |
| 79 | case AF_INET6: |
| 80 | return sizeof(struct sockaddr_in6); |
| 81 | case AF_IB: |
| 82 | return sizeof(struct sockaddr_ib); |
| 83 | default: |
| 84 | return 0; |
| 85 | } |
| 86 | } |
| 87 | EXPORT_SYMBOL(rdma_addr_size); |
| 88 | |
Matan Barak | dd5f03b | 2013-12-12 18:03:11 +0200 | [diff] [blame] | 89 | static struct rdma_addr_client self; |
| 90 | |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 91 | void rdma_addr_register_client(struct rdma_addr_client *client) |
| 92 | { |
| 93 | atomic_set(&client->refcount, 1); |
| 94 | init_completion(&client->comp); |
| 95 | } |
| 96 | EXPORT_SYMBOL(rdma_addr_register_client); |
| 97 | |
| 98 | static inline void put_client(struct rdma_addr_client *client) |
| 99 | { |
| 100 | if (atomic_dec_and_test(&client->refcount)) |
| 101 | complete(&client->comp); |
| 102 | } |
| 103 | |
| 104 | void rdma_addr_unregister_client(struct rdma_addr_client *client) |
| 105 | { |
| 106 | put_client(client); |
| 107 | wait_for_completion(&client->comp); |
| 108 | } |
| 109 | EXPORT_SYMBOL(rdma_addr_unregister_client); |
| 110 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 111 | int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, |
| 112 | const unsigned char *dst_dev_addr) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 113 | { |
Sean Hefty | c4315d8 | 2009-11-19 12:57:18 -0800 | [diff] [blame] | 114 | dev_addr->dev_type = dev->type; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 115 | memcpy(dev_addr->src_dev_addr, dev->dev_addr, MAX_ADDR_LEN); |
| 116 | memcpy(dev_addr->broadcast, dev->broadcast, MAX_ADDR_LEN); |
| 117 | if (dst_dev_addr) |
| 118 | memcpy(dev_addr->dst_dev_addr, dst_dev_addr, MAX_ADDR_LEN); |
Sean Hefty | 6266ed6 | 2009-11-19 12:55:22 -0800 | [diff] [blame] | 119 | dev_addr->bound_dev_if = dev->ifindex; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 120 | return 0; |
| 121 | } |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 122 | EXPORT_SYMBOL(rdma_copy_addr); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 123 | |
Matan Barak | dd5f03b | 2013-12-12 18:03:11 +0200 | [diff] [blame] | 124 | int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr, |
| 125 | u16 *vlan_id) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 126 | { |
| 127 | struct net_device *dev; |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 128 | int ret = -EADDRNOTAVAIL; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 129 | |
Sean Hefty | 6266ed6 | 2009-11-19 12:55:22 -0800 | [diff] [blame] | 130 | if (dev_addr->bound_dev_if) { |
| 131 | dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); |
| 132 | if (!dev) |
| 133 | return -ENODEV; |
| 134 | ret = rdma_copy_addr(dev_addr, dev, NULL); |
| 135 | dev_put(dev); |
| 136 | return ret; |
| 137 | } |
| 138 | |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 139 | switch (addr->sa_family) { |
| 140 | case AF_INET: |
| 141 | dev = ip_dev_find(&init_net, |
| 142 | ((struct sockaddr_in *) addr)->sin_addr.s_addr); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 143 | |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 144 | if (!dev) |
| 145 | return ret; |
| 146 | |
| 147 | ret = rdma_copy_addr(dev_addr, dev, NULL); |
Matan Barak | dd5f03b | 2013-12-12 18:03:11 +0200 | [diff] [blame] | 148 | if (vlan_id) |
| 149 | *vlan_id = rdma_vlan_dev_vlan_id(dev); |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 150 | dev_put(dev); |
| 151 | break; |
Roland Dreier | 2c4ab62 | 2008-12-29 23:37:14 -0800 | [diff] [blame] | 152 | |
Roland Dreier | d90f9b3 | 2012-07-05 22:39:34 -0700 | [diff] [blame] | 153 | #if IS_ENABLED(CONFIG_IPV6) |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 154 | case AF_INET6: |
Eric Dumazet | 22f4fbd | 2010-11-24 11:41:56 -0800 | [diff] [blame] | 155 | rcu_read_lock(); |
| 156 | for_each_netdev_rcu(&init_net, dev) { |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 157 | if (ipv6_chk_addr(&init_net, |
| 158 | &((struct sockaddr_in6 *) addr)->sin6_addr, |
| 159 | dev, 1)) { |
| 160 | ret = rdma_copy_addr(dev_addr, dev, NULL); |
Matan Barak | dd5f03b | 2013-12-12 18:03:11 +0200 | [diff] [blame] | 161 | if (vlan_id) |
| 162 | *vlan_id = rdma_vlan_dev_vlan_id(dev); |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 163 | break; |
| 164 | } |
| 165 | } |
Eric Dumazet | 22f4fbd | 2010-11-24 11:41:56 -0800 | [diff] [blame] | 166 | rcu_read_unlock(); |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 167 | break; |
Roland Dreier | 2c4ab62 | 2008-12-29 23:37:14 -0800 | [diff] [blame] | 168 | #endif |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 169 | } |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 170 | return ret; |
| 171 | } |
| 172 | EXPORT_SYMBOL(rdma_translate_ip); |
| 173 | |
| 174 | static void set_timeout(unsigned long time) |
| 175 | { |
| 176 | unsigned long delay; |
| 177 | |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 178 | delay = time - jiffies; |
| 179 | if ((long)delay <= 0) |
| 180 | delay = 1; |
| 181 | |
Tejun Heo | 41f63c5 | 2012-08-03 10:30:47 -0700 | [diff] [blame] | 182 | mod_delayed_work(addr_wq, &work, delay); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | static void queue_req(struct addr_req *req) |
| 186 | { |
| 187 | struct addr_req *temp_req; |
| 188 | |
| 189 | mutex_lock(&lock); |
| 190 | list_for_each_entry_reverse(temp_req, &req_list, list) { |
Krishna Kumar | f115db4 | 2006-10-17 10:09:09 +0530 | [diff] [blame] | 191 | if (time_after_eq(req->timeout, temp_req->timeout)) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 192 | break; |
| 193 | } |
| 194 | |
| 195 | list_add(&req->list, &temp_req->list); |
| 196 | |
| 197 | if (req_list.next == &req->list) |
| 198 | set_timeout(req->timeout); |
| 199 | mutex_unlock(&lock); |
| 200 | } |
| 201 | |
David Miller | 02b6195 | 2012-01-24 13:15:52 +0000 | [diff] [blame] | 202 | static int dst_fetch_ha(struct dst_entry *dst, struct rdma_dev_addr *dev_addr, void *daddr) |
David Miller | 51d4597 | 2011-12-02 16:52:14 +0000 | [diff] [blame] | 203 | { |
| 204 | struct neighbour *n; |
| 205 | int ret; |
| 206 | |
David Miller | 02b6195 | 2012-01-24 13:15:52 +0000 | [diff] [blame] | 207 | n = dst_neigh_lookup(dst, daddr); |
| 208 | |
David Miller | 51d4597 | 2011-12-02 16:52:14 +0000 | [diff] [blame] | 209 | rcu_read_lock(); |
David Miller | 51d4597 | 2011-12-02 16:52:14 +0000 | [diff] [blame] | 210 | if (!n || !(n->nud_state & NUD_VALID)) { |
| 211 | if (n) |
| 212 | neigh_event_send(n, NULL); |
| 213 | ret = -ENODATA; |
| 214 | } else { |
David Miller | 02b6195 | 2012-01-24 13:15:52 +0000 | [diff] [blame] | 215 | ret = rdma_copy_addr(dev_addr, dst->dev, n->ha); |
David Miller | 51d4597 | 2011-12-02 16:52:14 +0000 | [diff] [blame] | 216 | } |
| 217 | rcu_read_unlock(); |
| 218 | |
David Miller | 02b6195 | 2012-01-24 13:15:52 +0000 | [diff] [blame] | 219 | if (n) |
| 220 | neigh_release(n); |
| 221 | |
David Miller | 51d4597 | 2011-12-02 16:52:14 +0000 | [diff] [blame] | 222 | return ret; |
| 223 | } |
| 224 | |
Sean Hefty | 923c100 | 2009-11-19 13:26:51 -0800 | [diff] [blame] | 225 | static int addr4_resolve(struct sockaddr_in *src_in, |
| 226 | struct sockaddr_in *dst_in, |
| 227 | struct rdma_dev_addr *addr) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 228 | { |
Al Viro | 1b90c13 | 2008-03-29 03:10:28 +0000 | [diff] [blame] | 229 | __be32 src_ip = src_in->sin_addr.s_addr; |
| 230 | __be32 dst_ip = dst_in->sin_addr.s_addr; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 231 | struct rtable *rt; |
David S. Miller | 5fc3590 | 2011-05-09 14:52:02 -0700 | [diff] [blame] | 232 | struct flowi4 fl4; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 233 | int ret; |
| 234 | |
David S. Miller | 5fc3590 | 2011-05-09 14:52:02 -0700 | [diff] [blame] | 235 | memset(&fl4, 0, sizeof(fl4)); |
| 236 | fl4.daddr = dst_ip; |
| 237 | fl4.saddr = src_ip; |
| 238 | fl4.flowi4_oif = addr->bound_dev_if; |
| 239 | rt = ip_route_output_key(&init_net, &fl4); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 240 | if (IS_ERR(rt)) { |
| 241 | ret = PTR_ERR(rt); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 242 | goto out; |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 243 | } |
Sean Hefty | 923c100 | 2009-11-19 13:26:51 -0800 | [diff] [blame] | 244 | src_in->sin_family = AF_INET; |
David S. Miller | 5fc3590 | 2011-05-09 14:52:02 -0700 | [diff] [blame] | 245 | src_in->sin_addr.s_addr = fl4.saddr; |
Sean Hefty | 923c100 | 2009-11-19 13:26:51 -0800 | [diff] [blame] | 246 | |
Eric Dumazet | 72cdd1d | 2010-11-11 07:14:07 +0000 | [diff] [blame] | 247 | if (rt->dst.dev->flags & IFF_LOOPBACK) { |
Matan Barak | dd5f03b | 2013-12-12 18:03:11 +0200 | [diff] [blame] | 248 | ret = rdma_translate_ip((struct sockaddr *)dst_in, addr, NULL); |
Sean Hefty | 923c100 | 2009-11-19 13:26:51 -0800 | [diff] [blame] | 249 | if (!ret) |
| 250 | memcpy(addr->dst_dev_addr, addr->src_dev_addr, MAX_ADDR_LEN); |
| 251 | goto put; |
| 252 | } |
| 253 | |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 254 | /* If the device does ARP internally, return 'done' */ |
Eric Dumazet | 72cdd1d | 2010-11-11 07:14:07 +0000 | [diff] [blame] | 255 | if (rt->dst.dev->flags & IFF_NOARP) { |
Sean Hefty | 1bdd638 | 2011-03-17 23:35:39 +0000 | [diff] [blame] | 256 | ret = rdma_copy_addr(addr, rt->dst.dev, NULL); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 257 | goto put; |
| 258 | } |
| 259 | |
David Miller | 02b6195 | 2012-01-24 13:15:52 +0000 | [diff] [blame] | 260 | ret = dst_fetch_ha(&rt->dst, addr, &fl4.daddr); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 261 | put: |
| 262 | ip_rt_put(rt); |
| 263 | out: |
| 264 | return ret; |
| 265 | } |
| 266 | |
Roland Dreier | d90f9b3 | 2012-07-05 22:39:34 -0700 | [diff] [blame] | 267 | #if IS_ENABLED(CONFIG_IPV6) |
Sean Hefty | d14714d | 2009-11-19 16:46:25 -0800 | [diff] [blame] | 268 | static int addr6_resolve(struct sockaddr_in6 *src_in, |
| 269 | struct sockaddr_in6 *dst_in, |
| 270 | struct rdma_dev_addr *addr) |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 271 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 272 | struct flowi6 fl6; |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 273 | struct dst_entry *dst; |
Sean Hefty | d14714d | 2009-11-19 16:46:25 -0800 | [diff] [blame] | 274 | int ret; |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 275 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 276 | memset(&fl6, 0, sizeof fl6); |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 277 | fl6.daddr = dst_in->sin6_addr; |
| 278 | fl6.saddr = src_in->sin6_addr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 279 | fl6.flowi6_oif = addr->bound_dev_if; |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 280 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 281 | dst = ip6_route_output(&init_net, NULL, &fl6); |
Sean Hefty | d14714d | 2009-11-19 16:46:25 -0800 | [diff] [blame] | 282 | if ((ret = dst->error)) |
| 283 | goto put; |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 284 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 285 | if (ipv6_addr_any(&fl6.saddr)) { |
Sean Hefty | d14714d | 2009-11-19 16:46:25 -0800 | [diff] [blame] | 286 | ret = ipv6_dev_get_saddr(&init_net, ip6_dst_idev(dst)->dev, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 287 | &fl6.daddr, 0, &fl6.saddr); |
Sean Hefty | d14714d | 2009-11-19 16:46:25 -0800 | [diff] [blame] | 288 | if (ret) |
| 289 | goto put; |
| 290 | |
| 291 | src_in->sin6_family = AF_INET6; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 292 | src_in->sin6_addr = fl6.saddr; |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 293 | } |
| 294 | |
Sean Hefty | d14714d | 2009-11-19 16:46:25 -0800 | [diff] [blame] | 295 | if (dst->dev->flags & IFF_LOOPBACK) { |
Matan Barak | dd5f03b | 2013-12-12 18:03:11 +0200 | [diff] [blame] | 296 | ret = rdma_translate_ip((struct sockaddr *)dst_in, addr, NULL); |
Sean Hefty | d14714d | 2009-11-19 16:46:25 -0800 | [diff] [blame] | 297 | if (!ret) |
| 298 | memcpy(addr->dst_dev_addr, addr->src_dev_addr, MAX_ADDR_LEN); |
| 299 | goto put; |
| 300 | } |
| 301 | |
| 302 | /* If the device does ARP internally, return 'done' */ |
| 303 | if (dst->dev->flags & IFF_NOARP) { |
| 304 | ret = rdma_copy_addr(addr, dst->dev, NULL); |
| 305 | goto put; |
| 306 | } |
| 307 | |
David Miller | 02b6195 | 2012-01-24 13:15:52 +0000 | [diff] [blame] | 308 | ret = dst_fetch_ha(dst, addr, &fl6.daddr); |
Sean Hefty | d14714d | 2009-11-19 16:46:25 -0800 | [diff] [blame] | 309 | put: |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 310 | dst_release(dst); |
| 311 | return ret; |
| 312 | } |
Roland Dreier | 2c4ab62 | 2008-12-29 23:37:14 -0800 | [diff] [blame] | 313 | #else |
Sean Hefty | d14714d | 2009-11-19 16:46:25 -0800 | [diff] [blame] | 314 | static int addr6_resolve(struct sockaddr_in6 *src_in, |
| 315 | struct sockaddr_in6 *dst_in, |
| 316 | struct rdma_dev_addr *addr) |
Roland Dreier | 2c4ab62 | 2008-12-29 23:37:14 -0800 | [diff] [blame] | 317 | { |
| 318 | return -EADDRNOTAVAIL; |
| 319 | } |
| 320 | #endif |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 321 | |
Sean Hefty | 923c100 | 2009-11-19 13:26:51 -0800 | [diff] [blame] | 322 | static int addr_resolve(struct sockaddr *src_in, |
| 323 | struct sockaddr *dst_in, |
| 324 | struct rdma_dev_addr *addr) |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 325 | { |
| 326 | if (src_in->sa_family == AF_INET) { |
Sean Hefty | 923c100 | 2009-11-19 13:26:51 -0800 | [diff] [blame] | 327 | return addr4_resolve((struct sockaddr_in *) src_in, |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 328 | (struct sockaddr_in *) dst_in, addr); |
| 329 | } else |
Sean Hefty | d14714d | 2009-11-19 16:46:25 -0800 | [diff] [blame] | 330 | return addr6_resolve((struct sockaddr_in6 *) src_in, |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 331 | (struct sockaddr_in6 *) dst_in, addr); |
| 332 | } |
| 333 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 334 | static void process_req(struct work_struct *work) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 335 | { |
| 336 | struct addr_req *req, *temp_req; |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 337 | struct sockaddr *src_in, *dst_in; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 338 | struct list_head done_list; |
| 339 | |
| 340 | INIT_LIST_HEAD(&done_list); |
| 341 | |
| 342 | mutex_lock(&lock); |
| 343 | list_for_each_entry_safe(req, temp_req, &req_list, list) { |
Krishna Kumar | c78bb84 | 2006-11-24 16:02:34 +0530 | [diff] [blame] | 344 | if (req->status == -ENODATA) { |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 345 | src_in = (struct sockaddr *) &req->src_addr; |
| 346 | dst_in = (struct sockaddr *) &req->dst_addr; |
Sean Hefty | 923c100 | 2009-11-19 13:26:51 -0800 | [diff] [blame] | 347 | req->status = addr_resolve(src_in, dst_in, req->addr); |
Krishna Kumar | c78bb84 | 2006-11-24 16:02:34 +0530 | [diff] [blame] | 348 | if (req->status && time_after_eq(jiffies, req->timeout)) |
| 349 | req->status = -ETIMEDOUT; |
| 350 | else if (req->status == -ENODATA) |
| 351 | continue; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 352 | } |
Roland Dreier | 04699a1 | 2006-11-29 15:33:09 -0800 | [diff] [blame] | 353 | list_move_tail(&req->list, &done_list); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | if (!list_empty(&req_list)) { |
| 357 | req = list_entry(req_list.next, struct addr_req, list); |
| 358 | set_timeout(req->timeout); |
| 359 | } |
| 360 | mutex_unlock(&lock); |
| 361 | |
| 362 | list_for_each_entry_safe(req, temp_req, &done_list, list) { |
| 363 | list_del(&req->list); |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 364 | req->callback(req->status, (struct sockaddr *) &req->src_addr, |
| 365 | req->addr, req->context); |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 366 | put_client(req->client); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 367 | kfree(req); |
| 368 | } |
| 369 | } |
| 370 | |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 371 | int rdma_resolve_ip(struct rdma_addr_client *client, |
| 372 | struct sockaddr *src_addr, struct sockaddr *dst_addr, |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 373 | struct rdma_dev_addr *addr, int timeout_ms, |
| 374 | void (*callback)(int status, struct sockaddr *src_addr, |
| 375 | struct rdma_dev_addr *addr, void *context), |
| 376 | void *context) |
| 377 | { |
Aleksey Senin | 38617c6 | 2008-12-24 10:16:37 -0800 | [diff] [blame] | 378 | struct sockaddr *src_in, *dst_in; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 379 | struct addr_req *req; |
| 380 | int ret = 0; |
| 381 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 382 | req = kzalloc(sizeof *req, GFP_KERNEL); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 383 | if (!req) |
| 384 | return -ENOMEM; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 385 | |
Sean Hefty | d2e0886 | 2009-11-19 12:55:22 -0800 | [diff] [blame] | 386 | src_in = (struct sockaddr *) &req->src_addr; |
| 387 | dst_in = (struct sockaddr *) &req->dst_addr; |
| 388 | |
| 389 | if (src_addr) { |
| 390 | if (src_addr->sa_family != dst_addr->sa_family) { |
| 391 | ret = -EINVAL; |
| 392 | goto err; |
| 393 | } |
| 394 | |
Sean Hefty | ef56086 | 2013-05-29 10:09:10 -0700 | [diff] [blame] | 395 | memcpy(src_in, src_addr, rdma_addr_size(src_addr)); |
Sean Hefty | d2e0886 | 2009-11-19 12:55:22 -0800 | [diff] [blame] | 396 | } else { |
| 397 | src_in->sa_family = dst_addr->sa_family; |
| 398 | } |
| 399 | |
Sean Hefty | ef56086 | 2013-05-29 10:09:10 -0700 | [diff] [blame] | 400 | memcpy(dst_in, dst_addr, rdma_addr_size(dst_addr)); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 401 | req->addr = addr; |
| 402 | req->callback = callback; |
| 403 | req->context = context; |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 404 | req->client = client; |
| 405 | atomic_inc(&client->refcount); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 406 | |
Sean Hefty | d14714d | 2009-11-19 16:46:25 -0800 | [diff] [blame] | 407 | req->status = addr_resolve(src_in, dst_in, addr); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 408 | switch (req->status) { |
| 409 | case 0: |
| 410 | req->timeout = jiffies; |
| 411 | queue_req(req); |
| 412 | break; |
| 413 | case -ENODATA: |
| 414 | req->timeout = msecs_to_jiffies(timeout_ms) + jiffies; |
| 415 | queue_req(req); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 416 | break; |
| 417 | default: |
| 418 | ret = req->status; |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 419 | atomic_dec(&client->refcount); |
Sean Hefty | d2e0886 | 2009-11-19 12:55:22 -0800 | [diff] [blame] | 420 | goto err; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 421 | } |
| 422 | return ret; |
Sean Hefty | d2e0886 | 2009-11-19 12:55:22 -0800 | [diff] [blame] | 423 | err: |
| 424 | kfree(req); |
| 425 | return ret; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 426 | } |
| 427 | EXPORT_SYMBOL(rdma_resolve_ip); |
| 428 | |
| 429 | void rdma_addr_cancel(struct rdma_dev_addr *addr) |
| 430 | { |
| 431 | struct addr_req *req, *temp_req; |
| 432 | |
| 433 | mutex_lock(&lock); |
| 434 | list_for_each_entry_safe(req, temp_req, &req_list, list) { |
| 435 | if (req->addr == addr) { |
| 436 | req->status = -ECANCELED; |
| 437 | req->timeout = jiffies; |
Roland Dreier | 04699a1 | 2006-11-29 15:33:09 -0800 | [diff] [blame] | 438 | list_move(&req->list, &req_list); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 439 | set_timeout(req->timeout); |
| 440 | break; |
| 441 | } |
| 442 | } |
| 443 | mutex_unlock(&lock); |
| 444 | } |
| 445 | EXPORT_SYMBOL(rdma_addr_cancel); |
| 446 | |
Matan Barak | dd5f03b | 2013-12-12 18:03:11 +0200 | [diff] [blame] | 447 | struct resolve_cb_context { |
| 448 | struct rdma_dev_addr *addr; |
| 449 | struct completion comp; |
| 450 | }; |
| 451 | |
| 452 | static void resolve_cb(int status, struct sockaddr *src_addr, |
| 453 | struct rdma_dev_addr *addr, void *context) |
| 454 | { |
| 455 | memcpy(((struct resolve_cb_context *)context)->addr, addr, sizeof(struct |
| 456 | rdma_dev_addr)); |
| 457 | complete(&((struct resolve_cb_context *)context)->comp); |
| 458 | } |
| 459 | |
| 460 | int rdma_addr_find_dmac_by_grh(union ib_gid *sgid, union ib_gid *dgid, u8 *dmac, |
| 461 | u16 *vlan_id) |
| 462 | { |
| 463 | int ret = 0; |
| 464 | struct rdma_dev_addr dev_addr; |
| 465 | struct resolve_cb_context ctx; |
| 466 | struct net_device *dev; |
| 467 | |
| 468 | union { |
| 469 | struct sockaddr _sockaddr; |
| 470 | struct sockaddr_in _sockaddr_in; |
| 471 | struct sockaddr_in6 _sockaddr_in6; |
| 472 | } sgid_addr, dgid_addr; |
| 473 | |
| 474 | |
| 475 | ret = rdma_gid2ip(&sgid_addr._sockaddr, sgid); |
| 476 | if (ret) |
| 477 | return ret; |
| 478 | |
| 479 | ret = rdma_gid2ip(&dgid_addr._sockaddr, dgid); |
| 480 | if (ret) |
| 481 | return ret; |
| 482 | |
| 483 | memset(&dev_addr, 0, sizeof(dev_addr)); |
| 484 | |
| 485 | ctx.addr = &dev_addr; |
| 486 | init_completion(&ctx.comp); |
| 487 | ret = rdma_resolve_ip(&self, &sgid_addr._sockaddr, &dgid_addr._sockaddr, |
| 488 | &dev_addr, 1000, resolve_cb, &ctx); |
| 489 | if (ret) |
| 490 | return ret; |
| 491 | |
| 492 | wait_for_completion(&ctx.comp); |
| 493 | |
| 494 | memcpy(dmac, dev_addr.dst_dev_addr, ETH_ALEN); |
| 495 | dev = dev_get_by_index(&init_net, dev_addr.bound_dev_if); |
| 496 | if (!dev) |
| 497 | return -ENODEV; |
| 498 | if (vlan_id) |
| 499 | *vlan_id = rdma_vlan_dev_vlan_id(dev); |
| 500 | dev_put(dev); |
| 501 | return ret; |
| 502 | } |
| 503 | EXPORT_SYMBOL(rdma_addr_find_dmac_by_grh); |
| 504 | |
| 505 | int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id) |
| 506 | { |
| 507 | int ret = 0; |
| 508 | struct rdma_dev_addr dev_addr; |
| 509 | union { |
| 510 | struct sockaddr _sockaddr; |
| 511 | struct sockaddr_in _sockaddr_in; |
| 512 | struct sockaddr_in6 _sockaddr_in6; |
| 513 | } gid_addr; |
| 514 | |
| 515 | ret = rdma_gid2ip(&gid_addr._sockaddr, sgid); |
| 516 | |
| 517 | if (ret) |
| 518 | return ret; |
| 519 | memset(&dev_addr, 0, sizeof(dev_addr)); |
| 520 | ret = rdma_translate_ip(&gid_addr._sockaddr, &dev_addr, vlan_id); |
| 521 | if (ret) |
| 522 | return ret; |
| 523 | |
| 524 | memcpy(smac, dev_addr.src_dev_addr, ETH_ALEN); |
| 525 | return ret; |
| 526 | } |
| 527 | EXPORT_SYMBOL(rdma_addr_find_smac_by_sgid); |
| 528 | |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 529 | static int netevent_callback(struct notifier_block *self, unsigned long event, |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 530 | void *ctx) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 531 | { |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 532 | if (event == NETEVENT_NEIGH_UPDATE) { |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 533 | struct neighbour *neigh = ctx; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 534 | |
Steve Wise | 1f12667 | 2007-01-23 19:03:17 -0600 | [diff] [blame] | 535 | if (neigh->nud_state & NUD_VALID) { |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 536 | set_timeout(jiffies); |
| 537 | } |
| 538 | } |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 539 | return 0; |
| 540 | } |
| 541 | |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 542 | static struct notifier_block nb = { |
| 543 | .notifier_call = netevent_callback |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 544 | }; |
| 545 | |
Peter Huewe | 716abb1 | 2009-06-23 10:38:42 -0700 | [diff] [blame] | 546 | static int __init addr_init(void) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 547 | { |
Sean Hefty | c7f743a | 2007-02-01 12:23:37 -0800 | [diff] [blame] | 548 | addr_wq = create_singlethread_workqueue("ib_addr"); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 549 | if (!addr_wq) |
| 550 | return -ENOMEM; |
| 551 | |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 552 | register_netevent_notifier(&nb); |
Matan Barak | dd5f03b | 2013-12-12 18:03:11 +0200 | [diff] [blame] | 553 | rdma_addr_register_client(&self); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 554 | return 0; |
| 555 | } |
| 556 | |
Peter Huewe | 716abb1 | 2009-06-23 10:38:42 -0700 | [diff] [blame] | 557 | static void __exit addr_cleanup(void) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 558 | { |
Matan Barak | dd5f03b | 2013-12-12 18:03:11 +0200 | [diff] [blame] | 559 | rdma_addr_unregister_client(&self); |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 560 | unregister_netevent_notifier(&nb); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 561 | destroy_workqueue(addr_wq); |
| 562 | } |
| 563 | |
| 564 | module_init(addr_init); |
| 565 | module_exit(addr_cleanup); |