Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2015, Mellanox Technologies inc. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | */ |
| 32 | |
| 33 | #include "core_priv.h" |
| 34 | |
| 35 | #include <linux/in.h> |
| 36 | #include <linux/in6.h> |
| 37 | |
| 38 | /* For in6_dev_get/in6_dev_put */ |
| 39 | #include <net/addrconf.h> |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 40 | #include <net/bonding.h> |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 41 | |
| 42 | #include <rdma/ib_cache.h> |
| 43 | #include <rdma/ib_addr.h> |
| 44 | |
| 45 | enum gid_op_type { |
| 46 | GID_DEL = 0, |
| 47 | GID_ADD |
| 48 | }; |
| 49 | |
| 50 | struct update_gid_event_work { |
| 51 | struct work_struct work; |
| 52 | union ib_gid gid; |
| 53 | struct ib_gid_attr gid_attr; |
| 54 | enum gid_op_type gid_op; |
| 55 | }; |
| 56 | |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 57 | #define ROCE_NETDEV_CALLBACK_SZ 3 |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 58 | struct netdev_event_work_cmd { |
| 59 | roce_netdev_callback cb; |
| 60 | roce_netdev_filter filter; |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 61 | struct net_device *ndev; |
| 62 | struct net_device *filter_ndev; |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 63 | }; |
| 64 | |
| 65 | struct netdev_event_work { |
| 66 | struct work_struct work; |
| 67 | struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ]; |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 68 | }; |
| 69 | |
| 70 | static void update_gid(enum gid_op_type gid_op, struct ib_device *ib_dev, |
| 71 | u8 port, union ib_gid *gid, |
| 72 | struct ib_gid_attr *gid_attr) |
| 73 | { |
| 74 | switch (gid_op) { |
| 75 | case GID_ADD: |
| 76 | ib_cache_gid_add(ib_dev, port, gid, gid_attr); |
| 77 | break; |
| 78 | case GID_DEL: |
| 79 | ib_cache_gid_del(ib_dev, port, gid, gid_attr); |
| 80 | break; |
| 81 | } |
| 82 | } |
| 83 | |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 84 | enum bonding_slave_state { |
| 85 | BONDING_SLAVE_STATE_ACTIVE = 1UL << 0, |
| 86 | BONDING_SLAVE_STATE_INACTIVE = 1UL << 1, |
| 87 | /* No primary slave or the device isn't a slave in bonding */ |
| 88 | BONDING_SLAVE_STATE_NA = 1UL << 2, |
| 89 | }; |
| 90 | |
| 91 | static enum bonding_slave_state is_eth_active_slave_of_bonding_rcu(struct net_device *dev, |
| 92 | struct net_device *upper) |
| 93 | { |
| 94 | if (upper && netif_is_bond_master(upper)) { |
| 95 | struct net_device *pdev = |
| 96 | bond_option_active_slave_get_rcu(netdev_priv(upper)); |
| 97 | |
| 98 | if (pdev) |
| 99 | return dev == pdev ? BONDING_SLAVE_STATE_ACTIVE : |
| 100 | BONDING_SLAVE_STATE_INACTIVE; |
| 101 | } |
| 102 | |
| 103 | return BONDING_SLAVE_STATE_NA; |
| 104 | } |
| 105 | |
| 106 | static bool is_upper_dev_rcu(struct net_device *dev, struct net_device *upper) |
| 107 | { |
| 108 | struct net_device *_upper = NULL; |
| 109 | struct list_head *iter; |
| 110 | |
| 111 | netdev_for_each_all_upper_dev_rcu(dev, _upper, iter) |
| 112 | if (_upper == upper) |
| 113 | break; |
| 114 | |
| 115 | return _upper == upper; |
| 116 | } |
| 117 | |
| 118 | #define REQUIRED_BOND_STATES (BONDING_SLAVE_STATE_ACTIVE | \ |
| 119 | BONDING_SLAVE_STATE_NA) |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 120 | static int is_eth_port_of_netdev(struct ib_device *ib_dev, u8 port, |
| 121 | struct net_device *rdma_ndev, void *cookie) |
| 122 | { |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 123 | struct net_device *event_ndev = (struct net_device *)cookie; |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 124 | struct net_device *real_dev; |
| 125 | int res; |
| 126 | |
| 127 | if (!rdma_ndev) |
| 128 | return 0; |
| 129 | |
| 130 | rcu_read_lock(); |
| 131 | real_dev = rdma_vlan_dev_real_dev(event_ndev); |
| 132 | if (!real_dev) |
| 133 | real_dev = event_ndev; |
| 134 | |
| 135 | res = ((is_upper_dev_rcu(rdma_ndev, event_ndev) && |
| 136 | (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) & |
| 137 | REQUIRED_BOND_STATES)) || |
| 138 | real_dev == rdma_ndev); |
| 139 | |
| 140 | rcu_read_unlock(); |
| 141 | return res; |
| 142 | } |
| 143 | |
| 144 | static int is_eth_port_inactive_slave(struct ib_device *ib_dev, u8 port, |
| 145 | struct net_device *rdma_ndev, void *cookie) |
| 146 | { |
| 147 | struct net_device *master_dev; |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 148 | int res; |
| 149 | |
| 150 | if (!rdma_ndev) |
| 151 | return 0; |
| 152 | |
| 153 | rcu_read_lock(); |
| 154 | master_dev = netdev_master_upper_dev_get_rcu(rdma_ndev); |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 155 | res = is_eth_active_slave_of_bonding_rcu(rdma_ndev, master_dev) == |
| 156 | BONDING_SLAVE_STATE_INACTIVE; |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 157 | rcu_read_unlock(); |
| 158 | |
| 159 | return res; |
| 160 | } |
| 161 | |
| 162 | static int pass_all_filter(struct ib_device *ib_dev, u8 port, |
| 163 | struct net_device *rdma_ndev, void *cookie) |
| 164 | { |
| 165 | return 1; |
| 166 | } |
| 167 | |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 168 | static int upper_device_filter(struct ib_device *ib_dev, u8 port, |
| 169 | struct net_device *rdma_ndev, void *cookie) |
| 170 | { |
| 171 | struct net_device *event_ndev = (struct net_device *)cookie; |
| 172 | int res; |
| 173 | |
| 174 | if (!rdma_ndev) |
| 175 | return 0; |
| 176 | |
| 177 | if (rdma_ndev == event_ndev) |
| 178 | return 1; |
| 179 | |
| 180 | rcu_read_lock(); |
| 181 | res = is_upper_dev_rcu(rdma_ndev, event_ndev); |
| 182 | rcu_read_unlock(); |
| 183 | |
| 184 | return res; |
| 185 | } |
| 186 | |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 187 | static void update_gid_ip(enum gid_op_type gid_op, |
| 188 | struct ib_device *ib_dev, |
| 189 | u8 port, struct net_device *ndev, |
| 190 | struct sockaddr *addr) |
| 191 | { |
| 192 | union ib_gid gid; |
| 193 | struct ib_gid_attr gid_attr; |
| 194 | |
| 195 | rdma_ip2gid(addr, &gid); |
| 196 | memset(&gid_attr, 0, sizeof(gid_attr)); |
| 197 | gid_attr.ndev = ndev; |
| 198 | |
| 199 | update_gid(gid_op, ib_dev, port, &gid, &gid_attr); |
| 200 | } |
| 201 | |
| 202 | static void enum_netdev_default_gids(struct ib_device *ib_dev, |
| 203 | u8 port, struct net_device *event_ndev, |
| 204 | struct net_device *rdma_ndev) |
| 205 | { |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 206 | rcu_read_lock(); |
| 207 | if (!rdma_ndev || |
| 208 | ((rdma_ndev != event_ndev && |
| 209 | !is_upper_dev_rcu(rdma_ndev, event_ndev)) || |
| 210 | is_eth_active_slave_of_bonding_rcu(rdma_ndev, |
| 211 | netdev_master_upper_dev_get_rcu(rdma_ndev)) == |
| 212 | BONDING_SLAVE_STATE_INACTIVE)) { |
| 213 | rcu_read_unlock(); |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 214 | return; |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 215 | } |
| 216 | rcu_read_unlock(); |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 217 | |
| 218 | ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, |
| 219 | IB_CACHE_GID_DEFAULT_MODE_SET); |
| 220 | } |
| 221 | |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 222 | static void bond_delete_netdev_default_gids(struct ib_device *ib_dev, |
| 223 | u8 port, |
| 224 | struct net_device *event_ndev, |
| 225 | struct net_device *rdma_ndev) |
| 226 | { |
| 227 | struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev); |
| 228 | |
| 229 | if (!rdma_ndev) |
| 230 | return; |
| 231 | |
| 232 | if (!real_dev) |
| 233 | real_dev = event_ndev; |
| 234 | |
| 235 | rcu_read_lock(); |
| 236 | |
| 237 | if (is_upper_dev_rcu(rdma_ndev, event_ndev) && |
| 238 | is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) == |
| 239 | BONDING_SLAVE_STATE_INACTIVE) { |
| 240 | rcu_read_unlock(); |
| 241 | |
| 242 | ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, |
| 243 | IB_CACHE_GID_DEFAULT_MODE_DELETE); |
| 244 | } else { |
| 245 | rcu_read_unlock(); |
| 246 | } |
| 247 | } |
| 248 | |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 249 | static void enum_netdev_ipv4_ips(struct ib_device *ib_dev, |
| 250 | u8 port, struct net_device *ndev) |
| 251 | { |
| 252 | struct in_device *in_dev; |
Matan Barak | 3909642 | 2015-10-15 15:01:03 +0300 | [diff] [blame] | 253 | struct sin_list { |
| 254 | struct list_head list; |
| 255 | struct sockaddr_in ip; |
| 256 | }; |
| 257 | struct sin_list *sin_iter; |
| 258 | struct sin_list *sin_temp; |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 259 | |
Matan Barak | 3909642 | 2015-10-15 15:01:03 +0300 | [diff] [blame] | 260 | LIST_HEAD(sin_list); |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 261 | if (ndev->reg_state >= NETREG_UNREGISTERING) |
| 262 | return; |
| 263 | |
Matan Barak | 3909642 | 2015-10-15 15:01:03 +0300 | [diff] [blame] | 264 | rcu_read_lock(); |
| 265 | in_dev = __in_dev_get_rcu(ndev); |
| 266 | if (!in_dev) { |
| 267 | rcu_read_unlock(); |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 268 | return; |
Matan Barak | 3909642 | 2015-10-15 15:01:03 +0300 | [diff] [blame] | 269 | } |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 270 | |
| 271 | for_ifa(in_dev) { |
Matan Barak | 3909642 | 2015-10-15 15:01:03 +0300 | [diff] [blame] | 272 | struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 273 | |
Matan Barak | 3909642 | 2015-10-15 15:01:03 +0300 | [diff] [blame] | 274 | if (!entry) { |
| 275 | pr_warn("roce_gid_mgmt: couldn't allocate entry for IPv4 update\n"); |
| 276 | continue; |
| 277 | } |
| 278 | entry->ip.sin_family = AF_INET; |
| 279 | entry->ip.sin_addr.s_addr = ifa->ifa_address; |
| 280 | list_add_tail(&entry->list, &sin_list); |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 281 | } |
| 282 | endfor_ifa(in_dev); |
Matan Barak | 3909642 | 2015-10-15 15:01:03 +0300 | [diff] [blame] | 283 | rcu_read_unlock(); |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 284 | |
Matan Barak | 3909642 | 2015-10-15 15:01:03 +0300 | [diff] [blame] | 285 | list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) { |
| 286 | update_gid_ip(GID_ADD, ib_dev, port, ndev, |
| 287 | (struct sockaddr *)&sin_iter->ip); |
| 288 | list_del(&sin_iter->list); |
| 289 | kfree(sin_iter); |
| 290 | } |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 291 | } |
| 292 | |
| 293 | static void enum_netdev_ipv6_ips(struct ib_device *ib_dev, |
| 294 | u8 port, struct net_device *ndev) |
| 295 | { |
| 296 | struct inet6_ifaddr *ifp; |
| 297 | struct inet6_dev *in6_dev; |
| 298 | struct sin6_list { |
| 299 | struct list_head list; |
| 300 | struct sockaddr_in6 sin6; |
| 301 | }; |
| 302 | struct sin6_list *sin6_iter; |
| 303 | struct sin6_list *sin6_temp; |
| 304 | struct ib_gid_attr gid_attr = {.ndev = ndev}; |
| 305 | LIST_HEAD(sin6_list); |
| 306 | |
| 307 | if (ndev->reg_state >= NETREG_UNREGISTERING) |
| 308 | return; |
| 309 | |
| 310 | in6_dev = in6_dev_get(ndev); |
| 311 | if (!in6_dev) |
| 312 | return; |
| 313 | |
| 314 | read_lock_bh(&in6_dev->lock); |
| 315 | list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { |
| 316 | struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); |
| 317 | |
| 318 | if (!entry) { |
| 319 | pr_warn("roce_gid_mgmt: couldn't allocate entry for IPv6 update\n"); |
| 320 | continue; |
| 321 | } |
| 322 | |
| 323 | entry->sin6.sin6_family = AF_INET6; |
| 324 | entry->sin6.sin6_addr = ifp->addr; |
| 325 | list_add_tail(&entry->list, &sin6_list); |
| 326 | } |
| 327 | read_unlock_bh(&in6_dev->lock); |
| 328 | |
| 329 | in6_dev_put(in6_dev); |
| 330 | |
| 331 | list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) { |
| 332 | union ib_gid gid; |
| 333 | |
| 334 | rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid); |
| 335 | update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr); |
| 336 | list_del(&sin6_iter->list); |
| 337 | kfree(sin6_iter); |
| 338 | } |
| 339 | } |
| 340 | |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 341 | static void _add_netdev_ips(struct ib_device *ib_dev, u8 port, |
| 342 | struct net_device *ndev) |
| 343 | { |
| 344 | enum_netdev_ipv4_ips(ib_dev, port, ndev); |
| 345 | if (IS_ENABLED(CONFIG_IPV6)) |
| 346 | enum_netdev_ipv6_ips(ib_dev, port, ndev); |
| 347 | } |
| 348 | |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 349 | static void add_netdev_ips(struct ib_device *ib_dev, u8 port, |
| 350 | struct net_device *rdma_ndev, void *cookie) |
| 351 | { |
| 352 | struct net_device *event_ndev = (struct net_device *)cookie; |
| 353 | |
| 354 | enum_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev); |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 355 | _add_netdev_ips(ib_dev, port, event_ndev); |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | static void del_netdev_ips(struct ib_device *ib_dev, u8 port, |
| 359 | struct net_device *rdma_ndev, void *cookie) |
| 360 | { |
| 361 | struct net_device *event_ndev = (struct net_device *)cookie; |
| 362 | |
| 363 | ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); |
| 364 | } |
| 365 | |
| 366 | static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev, |
| 367 | u8 port, |
| 368 | struct net_device *rdma_ndev, |
| 369 | void *cookie) |
| 370 | { |
| 371 | struct net *net; |
| 372 | struct net_device *ndev; |
| 373 | |
| 374 | /* Lock the rtnl to make sure the netdevs does not move under |
| 375 | * our feet |
| 376 | */ |
| 377 | rtnl_lock(); |
| 378 | for_each_net(net) |
| 379 | for_each_netdev(net, ndev) |
| 380 | if (is_eth_port_of_netdev(ib_dev, port, rdma_ndev, ndev)) |
| 381 | add_netdev_ips(ib_dev, port, rdma_ndev, ndev); |
| 382 | rtnl_unlock(); |
| 383 | } |
| 384 | |
| 385 | /* This function will rescan all of the network devices in the system |
| 386 | * and add their gids, as needed, to the relevant RoCE devices. */ |
| 387 | int roce_rescan_device(struct ib_device *ib_dev) |
| 388 | { |
| 389 | ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL, |
| 390 | enum_all_gids_of_dev_cb, NULL); |
| 391 | |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | static void callback_for_addr_gid_device_scan(struct ib_device *device, |
| 396 | u8 port, |
| 397 | struct net_device *rdma_ndev, |
| 398 | void *cookie) |
| 399 | { |
| 400 | struct update_gid_event_work *parsed = cookie; |
| 401 | |
| 402 | return update_gid(parsed->gid_op, device, |
| 403 | port, &parsed->gid, |
| 404 | &parsed->gid_attr); |
| 405 | } |
| 406 | |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 407 | static void handle_netdev_upper(struct ib_device *ib_dev, u8 port, |
| 408 | void *cookie, |
| 409 | void (*handle_netdev)(struct ib_device *ib_dev, |
| 410 | u8 port, |
| 411 | struct net_device *ndev)) |
| 412 | { |
| 413 | struct net_device *ndev = (struct net_device *)cookie; |
| 414 | struct upper_list { |
| 415 | struct list_head list; |
| 416 | struct net_device *upper; |
| 417 | }; |
| 418 | struct net_device *upper; |
| 419 | struct list_head *iter; |
| 420 | struct upper_list *upper_iter; |
| 421 | struct upper_list *upper_temp; |
| 422 | LIST_HEAD(upper_list); |
| 423 | |
| 424 | rcu_read_lock(); |
| 425 | netdev_for_each_all_upper_dev_rcu(ndev, upper, iter) { |
| 426 | struct upper_list *entry = kmalloc(sizeof(*entry), |
| 427 | GFP_ATOMIC); |
| 428 | |
| 429 | if (!entry) { |
| 430 | pr_info("roce_gid_mgmt: couldn't allocate entry to delete ndev\n"); |
| 431 | continue; |
| 432 | } |
| 433 | |
| 434 | list_add_tail(&entry->list, &upper_list); |
| 435 | dev_hold(upper); |
| 436 | entry->upper = upper; |
| 437 | } |
| 438 | rcu_read_unlock(); |
| 439 | |
| 440 | handle_netdev(ib_dev, port, ndev); |
| 441 | list_for_each_entry_safe(upper_iter, upper_temp, &upper_list, |
| 442 | list) { |
| 443 | handle_netdev(ib_dev, port, upper_iter->upper); |
| 444 | dev_put(upper_iter->upper); |
| 445 | list_del(&upper_iter->list); |
| 446 | kfree(upper_iter); |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, |
| 451 | struct net_device *event_ndev) |
| 452 | { |
| 453 | ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); |
| 454 | } |
| 455 | |
| 456 | static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port, |
| 457 | struct net_device *rdma_ndev, void *cookie) |
| 458 | { |
| 459 | handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids); |
| 460 | } |
| 461 | |
| 462 | static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port, |
| 463 | struct net_device *rdma_ndev, void *cookie) |
| 464 | { |
| 465 | handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips); |
| 466 | } |
| 467 | |
| 468 | static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port, |
| 469 | struct net_device *rdma_ndev, |
| 470 | void *cookie) |
| 471 | { |
| 472 | struct net_device *master_ndev; |
| 473 | |
| 474 | rcu_read_lock(); |
| 475 | master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev); |
| 476 | if (master_ndev) |
| 477 | dev_hold(master_ndev); |
| 478 | rcu_read_unlock(); |
| 479 | |
| 480 | if (master_ndev) { |
| 481 | bond_delete_netdev_default_gids(ib_dev, port, master_ndev, |
| 482 | rdma_ndev); |
| 483 | dev_put(master_ndev); |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | static void del_netdev_default_ips(struct ib_device *ib_dev, u8 port, |
| 488 | struct net_device *rdma_ndev, void *cookie) |
| 489 | { |
| 490 | struct net_device *event_ndev = (struct net_device *)cookie; |
| 491 | |
| 492 | bond_delete_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev); |
| 493 | } |
| 494 | |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 495 | /* The following functions operate on all IB devices. netdevice_event and |
| 496 | * addr_event execute ib_enum_all_roce_netdevs through a work. |
| 497 | * ib_enum_all_roce_netdevs iterates through all IB devices. |
| 498 | */ |
| 499 | |
| 500 | static void netdevice_event_work_handler(struct work_struct *_work) |
| 501 | { |
| 502 | struct netdev_event_work *work = |
| 503 | container_of(_work, struct netdev_event_work, work); |
| 504 | unsigned int i; |
| 505 | |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 506 | for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) { |
| 507 | ib_enum_all_roce_netdevs(work->cmds[i].filter, |
| 508 | work->cmds[i].filter_ndev, |
| 509 | work->cmds[i].cb, |
| 510 | work->cmds[i].ndev); |
| 511 | dev_put(work->cmds[i].ndev); |
| 512 | dev_put(work->cmds[i].filter_ndev); |
| 513 | } |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 514 | |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 515 | kfree(work); |
| 516 | } |
| 517 | |
| 518 | static int netdevice_queue_work(struct netdev_event_work_cmd *cmds, |
| 519 | struct net_device *ndev) |
| 520 | { |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 521 | unsigned int i; |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 522 | struct netdev_event_work *ndev_work = |
| 523 | kmalloc(sizeof(*ndev_work), GFP_KERNEL); |
| 524 | |
| 525 | if (!ndev_work) { |
| 526 | pr_warn("roce_gid_mgmt: can't allocate work for netdevice_event\n"); |
| 527 | return NOTIFY_DONE; |
| 528 | } |
| 529 | |
| 530 | memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds)); |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 531 | for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) { |
| 532 | if (!ndev_work->cmds[i].ndev) |
| 533 | ndev_work->cmds[i].ndev = ndev; |
| 534 | if (!ndev_work->cmds[i].filter_ndev) |
| 535 | ndev_work->cmds[i].filter_ndev = ndev; |
| 536 | dev_hold(ndev_work->cmds[i].ndev); |
| 537 | dev_hold(ndev_work->cmds[i].filter_ndev); |
| 538 | } |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 539 | INIT_WORK(&ndev_work->work, netdevice_event_work_handler); |
| 540 | |
| 541 | queue_work(ib_wq, &ndev_work->work); |
| 542 | |
| 543 | return NOTIFY_DONE; |
| 544 | } |
| 545 | |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 546 | static const struct netdev_event_work_cmd add_cmd = { |
| 547 | .cb = add_netdev_ips, .filter = is_eth_port_of_netdev}; |
| 548 | static const struct netdev_event_work_cmd add_cmd_upper_ips = { |
| 549 | .cb = add_netdev_upper_ips, .filter = is_eth_port_of_netdev}; |
| 550 | |
Linus Torvalds | 26d2177 | 2015-09-09 08:33:31 -0700 | [diff] [blame] | 551 | static void netdevice_event_changeupper(struct netdev_notifier_changeupper_info *changeupper_info, |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 552 | struct netdev_event_work_cmd *cmds) |
| 553 | { |
| 554 | static const struct netdev_event_work_cmd upper_ips_del_cmd = { |
| 555 | .cb = del_netdev_upper_ips, .filter = upper_device_filter}; |
| 556 | static const struct netdev_event_work_cmd bonding_default_del_cmd = { |
| 557 | .cb = del_netdev_default_ips, .filter = is_eth_port_inactive_slave}; |
| 558 | |
Linus Torvalds | 26d2177 | 2015-09-09 08:33:31 -0700 | [diff] [blame] | 559 | if (changeupper_info->linking == false) { |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 560 | cmds[0] = upper_ips_del_cmd; |
Linus Torvalds | 26d2177 | 2015-09-09 08:33:31 -0700 | [diff] [blame] | 561 | cmds[0].ndev = changeupper_info->upper_dev; |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 562 | cmds[1] = add_cmd; |
Linus Torvalds | 26d2177 | 2015-09-09 08:33:31 -0700 | [diff] [blame] | 563 | } else { |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 564 | cmds[0] = bonding_default_del_cmd; |
Linus Torvalds | 26d2177 | 2015-09-09 08:33:31 -0700 | [diff] [blame] | 565 | cmds[0].ndev = changeupper_info->upper_dev; |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 566 | cmds[1] = add_cmd_upper_ips; |
Linus Torvalds | 26d2177 | 2015-09-09 08:33:31 -0700 | [diff] [blame] | 567 | cmds[1].ndev = changeupper_info->upper_dev; |
| 568 | cmds[1].filter_ndev = changeupper_info->upper_dev; |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 569 | } |
| 570 | } |
| 571 | |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 572 | static int netdevice_event(struct notifier_block *this, unsigned long event, |
| 573 | void *ptr) |
| 574 | { |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 575 | static const struct netdev_event_work_cmd del_cmd = { |
| 576 | .cb = del_netdev_ips, .filter = pass_all_filter}; |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 577 | static const struct netdev_event_work_cmd bonding_default_del_cmd_join = { |
| 578 | .cb = del_netdev_default_ips_join, .filter = is_eth_port_inactive_slave}; |
| 579 | static const struct netdev_event_work_cmd default_del_cmd = { |
| 580 | .cb = del_netdev_default_ips, .filter = pass_all_filter}; |
| 581 | static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = { |
| 582 | .cb = del_netdev_upper_ips, .filter = upper_device_filter}; |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 583 | struct net_device *ndev = netdev_notifier_info_to_dev(ptr); |
| 584 | struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} }; |
| 585 | |
| 586 | if (ndev->type != ARPHRD_ETHER) |
| 587 | return NOTIFY_DONE; |
| 588 | |
| 589 | switch (event) { |
| 590 | case NETDEV_REGISTER: |
| 591 | case NETDEV_UP: |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 592 | cmds[0] = bonding_default_del_cmd_join; |
| 593 | cmds[1] = add_cmd; |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 594 | break; |
| 595 | |
| 596 | case NETDEV_UNREGISTER: |
| 597 | if (ndev->reg_state < NETREG_UNREGISTERED) |
| 598 | cmds[0] = del_cmd; |
| 599 | else |
| 600 | return NOTIFY_DONE; |
| 601 | break; |
| 602 | |
| 603 | case NETDEV_CHANGEADDR: |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 604 | cmds[0] = default_del_cmd; |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 605 | cmds[1] = add_cmd; |
| 606 | break; |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 607 | |
| 608 | case NETDEV_CHANGEUPPER: |
| 609 | netdevice_event_changeupper( |
Linus Torvalds | 26d2177 | 2015-09-09 08:33:31 -0700 | [diff] [blame] | 610 | container_of(ptr, struct netdev_notifier_changeupper_info, info), |
Matan Barak | 238fdf4 | 2015-07-30 18:33:27 +0300 | [diff] [blame] | 611 | cmds); |
| 612 | break; |
| 613 | |
| 614 | case NETDEV_BONDING_FAILOVER: |
| 615 | cmds[0] = bonding_event_ips_del_cmd; |
| 616 | cmds[1] = bonding_default_del_cmd_join; |
| 617 | cmds[2] = add_cmd_upper_ips; |
| 618 | break; |
| 619 | |
Matan Barak | 03db3a2 | 2015-07-30 18:33:26 +0300 | [diff] [blame] | 620 | default: |
| 621 | return NOTIFY_DONE; |
| 622 | } |
| 623 | |
| 624 | return netdevice_queue_work(cmds, ndev); |
| 625 | } |
| 626 | |
| 627 | static void update_gid_event_work_handler(struct work_struct *_work) |
| 628 | { |
| 629 | struct update_gid_event_work *work = |
| 630 | container_of(_work, struct update_gid_event_work, work); |
| 631 | |
| 632 | ib_enum_all_roce_netdevs(is_eth_port_of_netdev, work->gid_attr.ndev, |
| 633 | callback_for_addr_gid_device_scan, work); |
| 634 | |
| 635 | dev_put(work->gid_attr.ndev); |
| 636 | kfree(work); |
| 637 | } |
| 638 | |
| 639 | static int addr_event(struct notifier_block *this, unsigned long event, |
| 640 | struct sockaddr *sa, struct net_device *ndev) |
| 641 | { |
| 642 | struct update_gid_event_work *work; |
| 643 | enum gid_op_type gid_op; |
| 644 | |
| 645 | if (ndev->type != ARPHRD_ETHER) |
| 646 | return NOTIFY_DONE; |
| 647 | |
| 648 | switch (event) { |
| 649 | case NETDEV_UP: |
| 650 | gid_op = GID_ADD; |
| 651 | break; |
| 652 | |
| 653 | case NETDEV_DOWN: |
| 654 | gid_op = GID_DEL; |
| 655 | break; |
| 656 | |
| 657 | default: |
| 658 | return NOTIFY_DONE; |
| 659 | } |
| 660 | |
| 661 | work = kmalloc(sizeof(*work), GFP_ATOMIC); |
| 662 | if (!work) { |
| 663 | pr_warn("roce_gid_mgmt: Couldn't allocate work for addr_event\n"); |
| 664 | return NOTIFY_DONE; |
| 665 | } |
| 666 | |
| 667 | INIT_WORK(&work->work, update_gid_event_work_handler); |
| 668 | |
| 669 | rdma_ip2gid(sa, &work->gid); |
| 670 | work->gid_op = gid_op; |
| 671 | |
| 672 | memset(&work->gid_attr, 0, sizeof(work->gid_attr)); |
| 673 | dev_hold(ndev); |
| 674 | work->gid_attr.ndev = ndev; |
| 675 | |
| 676 | queue_work(ib_wq, &work->work); |
| 677 | |
| 678 | return NOTIFY_DONE; |
| 679 | } |
| 680 | |
| 681 | static int inetaddr_event(struct notifier_block *this, unsigned long event, |
| 682 | void *ptr) |
| 683 | { |
| 684 | struct sockaddr_in in; |
| 685 | struct net_device *ndev; |
| 686 | struct in_ifaddr *ifa = ptr; |
| 687 | |
| 688 | in.sin_family = AF_INET; |
| 689 | in.sin_addr.s_addr = ifa->ifa_address; |
| 690 | ndev = ifa->ifa_dev->dev; |
| 691 | |
| 692 | return addr_event(this, event, (struct sockaddr *)&in, ndev); |
| 693 | } |
| 694 | |
| 695 | static int inet6addr_event(struct notifier_block *this, unsigned long event, |
| 696 | void *ptr) |
| 697 | { |
| 698 | struct sockaddr_in6 in6; |
| 699 | struct net_device *ndev; |
| 700 | struct inet6_ifaddr *ifa6 = ptr; |
| 701 | |
| 702 | in6.sin6_family = AF_INET6; |
| 703 | in6.sin6_addr = ifa6->addr; |
| 704 | ndev = ifa6->idev->dev; |
| 705 | |
| 706 | return addr_event(this, event, (struct sockaddr *)&in6, ndev); |
| 707 | } |
| 708 | |
| 709 | static struct notifier_block nb_netdevice = { |
| 710 | .notifier_call = netdevice_event |
| 711 | }; |
| 712 | |
| 713 | static struct notifier_block nb_inetaddr = { |
| 714 | .notifier_call = inetaddr_event |
| 715 | }; |
| 716 | |
| 717 | static struct notifier_block nb_inet6addr = { |
| 718 | .notifier_call = inet6addr_event |
| 719 | }; |
| 720 | |
| 721 | int __init roce_gid_mgmt_init(void) |
| 722 | { |
| 723 | register_inetaddr_notifier(&nb_inetaddr); |
| 724 | if (IS_ENABLED(CONFIG_IPV6)) |
| 725 | register_inet6addr_notifier(&nb_inet6addr); |
| 726 | /* We relay on the netdevice notifier to enumerate all |
| 727 | * existing devices in the system. Register to this notifier |
| 728 | * last to make sure we will not miss any IP add/del |
| 729 | * callbacks. |
| 730 | */ |
| 731 | register_netdevice_notifier(&nb_netdevice); |
| 732 | |
| 733 | return 0; |
| 734 | } |
| 735 | |
| 736 | void __exit roce_gid_mgmt_cleanup(void) |
| 737 | { |
| 738 | if (IS_ENABLED(CONFIG_IPV6)) |
| 739 | unregister_inet6addr_notifier(&nb_inet6addr); |
| 740 | unregister_inetaddr_notifier(&nb_inetaddr); |
| 741 | unregister_netdevice_notifier(&nb_netdevice); |
| 742 | /* Ensure all gid deletion tasks complete before we go down, |
| 743 | * to avoid any reference to free'd memory. By the time |
| 744 | * ib-core is removed, all physical devices have been removed, |
| 745 | * so no issue with remaining hardware contexts. |
| 746 | */ |
| 747 | } |