1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2007-2014 Nicira, Inc. 4 */ 5 6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 7 8 #include <linux/init.h> 9 #include <linux/module.h> 10 #include <linux/if_arp.h> 11 #include <linux/if_vlan.h> 12 #include <linux/in.h> 13 #include <linux/ip.h> 14 #include <linux/jhash.h> 15 #include <linux/delay.h> 16 #include <linux/time.h> 17 #include <linux/etherdevice.h> 18 #include <linux/genetlink.h> 19 #include <linux/kernel.h> 20 #include <linux/kthread.h> 21 #include <linux/mutex.h> 22 #include <linux/percpu.h> 23 #include <linux/rcupdate.h> 24 #include <linux/tcp.h> 25 #include <linux/udp.h> 26 #include <linux/ethtool.h> 27 #include <linux/wait.h> 28 #include <asm/div64.h> 29 #include <linux/highmem.h> 30 #include <linux/netfilter_bridge.h> 31 #include <linux/netfilter_ipv4.h> 32 #include <linux/inetdevice.h> 33 #include <linux/list.h> 34 #include <linux/openvswitch.h> 35 #include <linux/rculist.h> 36 #include <linux/dmi.h> 37 #include <net/genetlink.h> 38 #include <net/net_namespace.h> 39 #include <net/netns/generic.h> 40 41 #include "datapath.h" 42 #include "flow.h" 43 #include "flow_table.h" 44 #include "flow_netlink.h" 45 #include "meter.h" 46 #include "vport-internal_dev.h" 47 #include "vport-netdev.h" 48 49 unsigned int ovs_net_id __read_mostly; 50 51 static struct genl_family dp_packet_genl_family; 52 static struct genl_family dp_flow_genl_family; 53 static struct genl_family dp_datapath_genl_family; 54 55 static const struct nla_policy flow_policy[]; 56 57 static const struct genl_multicast_group ovs_dp_flow_multicast_group = { 58 .name = OVS_FLOW_MCGROUP, 59 }; 60 61 static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { 62 .name = OVS_DATAPATH_MCGROUP, 63 }; 64 65 static const struct genl_multicast_group ovs_dp_vport_multicast_group = { 66 .name = OVS_VPORT_MCGROUP, 67 }; 68 69 /* Check if need to build a reply message. 70 * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ 71 static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, 72 unsigned int group) 73 { 74 return info->nlhdr->nlmsg_flags & NLM_F_ECHO || 75 genl_has_listeners(family, genl_info_net(info), group); 76 } 77 78 static void ovs_notify(struct genl_family *family, 79 struct sk_buff *skb, struct genl_info *info) 80 { 81 genl_notify(family, skb, info, 0, GFP_KERNEL); 82 } 83 84 /** 85 * DOC: Locking: 86 * 87 * All writes e.g. Writes to device state (add/remove datapath, port, set 88 * operations on vports, etc.), Writes to other state (flow table 89 * modifications, set miscellaneous datapath parameters, etc.) are protected 90 * by ovs_lock. 91 * 92 * Reads are protected by RCU. 93 * 94 * There are a few special cases (mostly stats) that have their own 95 * synchronization but they nest under all of above and don't interact with 96 * each other. 97 * 98 * The RTNL lock nests inside ovs_mutex. 99 */ 100 101 static DEFINE_MUTEX(ovs_mutex); 102 103 void ovs_lock(void) 104 { 105 mutex_lock(&ovs_mutex); 106 } 107 108 void ovs_unlock(void) 109 { 110 mutex_unlock(&ovs_mutex); 111 } 112 113 #ifdef CONFIG_LOCKDEP 114 int lockdep_ovsl_is_held(void) 115 { 116 if (debug_locks) 117 return lockdep_is_held(&ovs_mutex); 118 else 119 return 1; 120 } 121 #endif 122 123 static struct vport *new_vport(const struct vport_parms *); 124 static int queue_gso_packets(struct datapath *dp, struct sk_buff *, 125 const struct sw_flow_key *, 126 const struct dp_upcall_info *, 127 uint32_t cutlen); 128 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, 129 const struct sw_flow_key *, 130 const struct dp_upcall_info *, 131 uint32_t cutlen); 132 133 /* Must be called with rcu_read_lock or ovs_mutex. */ 134 const char *ovs_dp_name(const struct datapath *dp) 135 { 136 struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); 137 return ovs_vport_name(vport); 138 } 139 140 static int get_dpifindex(const struct datapath *dp) 141 { 142 struct vport *local; 143 int ifindex; 144 145 rcu_read_lock(); 146 147 local = ovs_vport_rcu(dp, OVSP_LOCAL); 148 if (local) 149 ifindex = local->dev->ifindex; 150 else 151 ifindex = 0; 152 153 rcu_read_unlock(); 154 155 return ifindex; 156 } 157 158 static void destroy_dp_rcu(struct rcu_head *rcu) 159 { 160 struct datapath *dp = container_of(rcu, struct datapath, rcu); 161 162 ovs_flow_tbl_destroy(&dp->table); 163 free_percpu(dp->stats_percpu); 164 kfree(dp->ports); 165 ovs_meters_exit(dp); 166 kfree(dp); 167 } 168 169 static struct hlist_head *vport_hash_bucket(const struct datapath *dp, 170 u16 port_no) 171 { 172 return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; 173 } 174 175 /* Called with ovs_mutex or RCU read lock. */ 176 struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) 177 { 178 struct vport *vport; 179 struct hlist_head *head; 180 181 head = vport_hash_bucket(dp, port_no); 182 hlist_for_each_entry_rcu(vport, head, dp_hash_node) { 183 if (vport->port_no == port_no) 184 return vport; 185 } 186 return NULL; 187 } 188 189 /* Called with ovs_mutex. */ 190 static struct vport *new_vport(const struct vport_parms *parms) 191 { 192 struct vport *vport; 193 194 vport = ovs_vport_add(parms); 195 if (!IS_ERR(vport)) { 196 struct datapath *dp = parms->dp; 197 struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); 198 199 hlist_add_head_rcu(&vport->dp_hash_node, head); 200 } 201 return vport; 202 } 203 204 void ovs_dp_detach_port(struct vport *p) 205 { 206 ASSERT_OVSL(); 207 208 /* First drop references to device. */ 209 hlist_del_rcu(&p->dp_hash_node); 210 211 /* Then destroy it. */ 212 ovs_vport_del(p); 213 } 214 215 /* Must be called with rcu_read_lock. */ 216 void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) 217 { 218 const struct vport *p = OVS_CB(skb)->input_vport; 219 struct datapath *dp = p->dp; 220 struct sw_flow *flow; 221 struct sw_flow_actions *sf_acts; 222 struct dp_stats_percpu *stats; 223 u64 *stats_counter; 224 u32 n_mask_hit; 225 int error; 226 227 stats = this_cpu_ptr(dp->stats_percpu); 228 229 /* Look up flow. */ 230 flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), 231 &n_mask_hit); 232 if (unlikely(!flow)) { 233 struct dp_upcall_info upcall; 234 235 memset(&upcall, 0, sizeof(upcall)); 236 upcall.cmd = OVS_PACKET_CMD_MISS; 237 upcall.portid = ovs_vport_find_upcall_portid(p, skb); 238 upcall.mru = OVS_CB(skb)->mru; 239 error = ovs_dp_upcall(dp, skb, key, &upcall, 0); 240 if (unlikely(error)) 241 kfree_skb(skb); 242 else 243 consume_skb(skb); 244 stats_counter = &stats->n_missed; 245 goto out; 246 } 247 248 ovs_flow_stats_update(flow, key->tp.flags, skb); 249 sf_acts = rcu_dereference(flow->sf_acts); 250 error = ovs_execute_actions(dp, skb, sf_acts, key); 251 if (unlikely(error)) 252 net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n", 253 ovs_dp_name(dp), error); 254 255 stats_counter = &stats->n_hit; 256 257 out: 258 /* Update datapath statistics. */ 259 u64_stats_update_begin(&stats->syncp); 260 (*stats_counter)++; 261 stats->n_mask_hit += n_mask_hit; 262 u64_stats_update_end(&stats->syncp); 263 } 264 265 int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, 266 const struct sw_flow_key *key, 267 const struct dp_upcall_info *upcall_info, 268 uint32_t cutlen) 269 { 270 struct dp_stats_percpu *stats; 271 int err; 272 273 if (upcall_info->portid == 0) { 274 err = -ENOTCONN; 275 goto err; 276 } 277 278 if (!skb_is_gso(skb)) 279 err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); 280 else 281 err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); 282 if (err) 283 goto err; 284 285 return 0; 286 287 err: 288 stats = this_cpu_ptr(dp->stats_percpu); 289 290 u64_stats_update_begin(&stats->syncp); 291 stats->n_lost++; 292 u64_stats_update_end(&stats->syncp); 293 294 return err; 295 } 296 297 static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, 298 const struct sw_flow_key *key, 299 const struct dp_upcall_info *upcall_info, 300 uint32_t cutlen) 301 { 302 unsigned int gso_type = skb_shinfo(skb)->gso_type; 303 struct sw_flow_key later_key; 304 struct sk_buff *segs, *nskb; 305 int err; 306 307 BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET); 308 segs = __skb_gso_segment(skb, NETIF_F_SG, false); 309 if (IS_ERR(segs)) 310 return PTR_ERR(segs); 311 if (segs == NULL) 312 return -EINVAL; 313 314 if (gso_type & SKB_GSO_UDP) { 315 /* The initial flow key extracted by ovs_flow_key_extract() 316 * in this case is for a first fragment, so we need to 317 * properly mark later fragments. 318 */ 319 later_key = *key; 320 later_key.ip.frag = OVS_FRAG_TYPE_LATER; 321 } 322 323 /* Queue all of the segments. */ 324 skb = segs; 325 do { 326 if (gso_type & SKB_GSO_UDP && skb != segs) 327 key = &later_key; 328 329 err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); 330 if (err) 331 break; 332 333 } while ((skb = skb->next)); 334 335 /* Free all of the segments. */ 336 skb = segs; 337 do { 338 nskb = skb->next; 339 if (err) 340 kfree_skb(skb); 341 else 342 consume_skb(skb); 343 } while ((skb = nskb)); 344 return err; 345 } 346 347 static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, 348 unsigned int hdrlen, int actions_attrlen) 349 { 350 size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) 351 + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ 352 + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ 353 + nla_total_size(sizeof(unsigned int)) /* OVS_PACKET_ATTR_LEN */ 354 + nla_total_size(sizeof(u64)); /* OVS_PACKET_ATTR_HASH */ 355 356 /* OVS_PACKET_ATTR_USERDATA */ 357 if (upcall_info->userdata) 358 size += NLA_ALIGN(upcall_info->userdata->nla_len); 359 360 /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ 361 if (upcall_info->egress_tun_info) 362 size += nla_total_size(ovs_tun_key_attr_size()); 363 364 /* OVS_PACKET_ATTR_ACTIONS */ 365 if (upcall_info->actions_len) 366 size += nla_total_size(actions_attrlen); 367 368 /* OVS_PACKET_ATTR_MRU */ 369 if (upcall_info->mru) 370 size += nla_total_size(sizeof(upcall_info->mru)); 371 372 return size; 373 } 374 375 static void pad_packet(struct datapath *dp, struct sk_buff *skb) 376 { 377 if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { 378 size_t plen = NLA_ALIGN(skb->len) - skb->len; 379 380 if (plen > 0) 381 skb_put_zero(skb, plen); 382 } 383 } 384 385 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, 386 const struct sw_flow_key *key, 387 const struct dp_upcall_info *upcall_info, 388 uint32_t cutlen) 389 { 390 struct ovs_header *upcall; 391 struct sk_buff *nskb = NULL; 392 struct sk_buff *user_skb = NULL; /* to be queued to userspace */ 393 struct nlattr *nla; 394 size_t len; 395 unsigned int hlen; 396 int err, dp_ifindex; 397 u64 hash; 398 399 dp_ifindex = get_dpifindex(dp); 400 if (!dp_ifindex) 401 return -ENODEV; 402 403 if (skb_vlan_tag_present(skb)) { 404 nskb = skb_clone(skb, GFP_ATOMIC); 405 if (!nskb) 406 return -ENOMEM; 407 408 nskb = __vlan_hwaccel_push_inside(nskb); 409 if (!nskb) 410 return -ENOMEM; 411 412 skb = nskb; 413 } 414 415 if (nla_attr_size(skb->len) > USHRT_MAX) { 416 err = -EFBIG; 417 goto out; 418 } 419 420 /* Complete checksum if needed */ 421 if (skb->ip_summed == CHECKSUM_PARTIAL && 422 (err = skb_csum_hwoffload_help(skb, 0))) 423 goto out; 424 425 /* Older versions of OVS user space enforce alignment of the last 426 * Netlink attribute to NLA_ALIGNTO which would require extensive 427 * padding logic. Only perform zerocopy if padding is not required. 428 */ 429 if (dp->user_features & OVS_DP_F_UNALIGNED) 430 hlen = skb_zerocopy_headlen(skb); 431 else 432 hlen = skb->len; 433 434 len = upcall_msg_size(upcall_info, hlen - cutlen, 435 OVS_CB(skb)->acts_origlen); 436 user_skb = genlmsg_new(len, GFP_ATOMIC); 437 if (!user_skb) { 438 err = -ENOMEM; 439 goto out; 440 } 441 442 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, 443 0, upcall_info->cmd); 444 if (!upcall) { 445 err = -EINVAL; 446 goto out; 447 } 448 upcall->dp_ifindex = dp_ifindex; 449 450 err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); 451 if (err) 452 goto out; 453 454 if (upcall_info->userdata) 455 __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, 456 nla_len(upcall_info->userdata), 457 nla_data(upcall_info->userdata)); 458 459 if (upcall_info->egress_tun_info) { 460 nla = nla_nest_start_noflag(user_skb, 461 OVS_PACKET_ATTR_EGRESS_TUN_KEY); 462 if (!nla) { 463 err = -EMSGSIZE; 464 goto out; 465 } 466 err = ovs_nla_put_tunnel_info(user_skb, 467 upcall_info->egress_tun_info); 468 if (err) 469 goto out; 470 471 nla_nest_end(user_skb, nla); 472 } 473 474 if (upcall_info->actions_len) { 475 nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS); 476 if (!nla) { 477 err = -EMSGSIZE; 478 goto out; 479 } 480 err = ovs_nla_put_actions(upcall_info->actions, 481 upcall_info->actions_len, 482 user_skb); 483 if (!err) 484 nla_nest_end(user_skb, nla); 485 else 486 nla_nest_cancel(user_skb, nla); 487 } 488 489 /* Add OVS_PACKET_ATTR_MRU */ 490 if (upcall_info->mru && 491 nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, upcall_info->mru)) { 492 err = -ENOBUFS; 493 goto out; 494 } 495 496 /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ 497 if (cutlen > 0 && 498 nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, skb->len)) { 499 err = -ENOBUFS; 500 goto out; 501 } 502 503 /* Add OVS_PACKET_ATTR_HASH */ 504 hash = skb_get_hash_raw(skb); 505 if (skb->sw_hash) 506 hash |= OVS_PACKET_HASH_SW_BIT; 507 508 if (skb->l4_hash) 509 hash |= OVS_PACKET_HASH_L4_BIT; 510 511 if (nla_put(user_skb, OVS_PACKET_ATTR_HASH, sizeof (u64), &hash)) { 512 err = -ENOBUFS; 513 goto out; 514 } 515 516 /* Only reserve room for attribute header, packet data is added 517 * in skb_zerocopy() */ 518 if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { 519 err = -ENOBUFS; 520 goto out; 521 } 522 nla->nla_len = nla_attr_size(skb->len - cutlen); 523 524 err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); 525 if (err) 526 goto out; 527 528 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ 529 pad_packet(dp, user_skb); 530 531 ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; 532 533 err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); 534 user_skb = NULL; 535 out: 536 if (err) 537 skb_tx_error(skb); 538 kfree_skb(user_skb); 539 kfree_skb(nskb); 540 return err; 541 } 542 543 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) 544 { 545 struct ovs_header *ovs_header = info->userhdr; 546 struct net *net = sock_net(skb->sk); 547 struct nlattr **a = info->attrs; 548 struct sw_flow_actions *acts; 549 struct sk_buff *packet; 550 struct sw_flow *flow; 551 struct sw_flow_actions *sf_acts; 552 struct datapath *dp; 553 struct vport *input_vport; 554 u16 mru = 0; 555 u64 hash; 556 int len; 557 int err; 558 bool log = !a[OVS_PACKET_ATTR_PROBE]; 559 560 err = -EINVAL; 561 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || 562 !a[OVS_PACKET_ATTR_ACTIONS]) 563 goto err; 564 565 len = nla_len(a[OVS_PACKET_ATTR_PACKET]); 566 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); 567 err = -ENOMEM; 568 if (!packet) 569 goto err; 570 skb_reserve(packet, NET_IP_ALIGN); 571 572 nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); 573 574 /* Set packet's mru */ 575 if (a[OVS_PACKET_ATTR_MRU]) { 576 mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); 577 packet->ignore_df = 1; 578 } 579 OVS_CB(packet)->mru = mru; 580 581 if (a[OVS_PACKET_ATTR_HASH]) { 582 hash = nla_get_u64(a[OVS_PACKET_ATTR_HASH]); 583 584 __skb_set_hash(packet, hash & 0xFFFFFFFFULL, 585 !!(hash & OVS_PACKET_HASH_SW_BIT), 586 !!(hash & OVS_PACKET_HASH_L4_BIT)); 587 } 588 589 /* Build an sw_flow for sending this packet. */ 590 flow = ovs_flow_alloc(); 591 err = PTR_ERR(flow); 592 if (IS_ERR(flow)) 593 goto err_kfree_skb; 594 595 err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], 596 packet, &flow->key, log); 597 if (err) 598 goto err_flow_free; 599 600 err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], 601 &flow->key, &acts, log); 602 if (err) 603 goto err_flow_free; 604 605 rcu_assign_pointer(flow->sf_acts, acts); 606 packet->priority = flow->key.phy.priority; 607 packet->mark = flow->key.phy.skb_mark; 608 609 rcu_read_lock(); 610 dp = get_dp_rcu(net, ovs_header->dp_ifindex); 611 err = -ENODEV; 612 if (!dp) 613 goto err_unlock; 614 615 input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); 616 if (!input_vport) 617 input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); 618 619 if (!input_vport) 620 goto err_unlock; 621 622 packet->dev = input_vport->dev; 623 OVS_CB(packet)->input_vport = input_vport; 624 sf_acts = rcu_dereference(flow->sf_acts); 625 626 local_bh_disable(); 627 err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); 628 local_bh_enable(); 629 rcu_read_unlock(); 630 631 ovs_flow_free(flow, false); 632 return err; 633 634 err_unlock: 635 rcu_read_unlock(); 636 err_flow_free: 637 ovs_flow_free(flow, false); 638 err_kfree_skb: 639 kfree_skb(packet); 640 err: 641 return err; 642 } 643 644 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { 645 [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, 646 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, 647 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, 648 [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, 649 [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, 650 }; 651 652 static const struct genl_ops dp_packet_genl_ops[] = { 653 { .cmd = OVS_PACKET_CMD_EXECUTE, 654 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 655 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ 656 .doit = ovs_packet_cmd_execute 657 } 658 }; 659 660 static struct genl_family dp_packet_genl_family __ro_after_init = { 661 .hdrsize = sizeof(struct ovs_header), 662 .name = OVS_PACKET_FAMILY, 663 .version = OVS_PACKET_VERSION, 664 .maxattr = OVS_PACKET_ATTR_MAX, 665 .policy = packet_policy, 666 .netnsok = true, 667 .parallel_ops = true, 668 .ops = dp_packet_genl_ops, 669 .n_ops = ARRAY_SIZE(dp_packet_genl_ops), 670 .module = THIS_MODULE, 671 }; 672 673 static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, 674 struct ovs_dp_megaflow_stats *mega_stats) 675 { 676 int i; 677 678 memset(mega_stats, 0, sizeof(*mega_stats)); 679 680 stats->n_flows = ovs_flow_tbl_count(&dp->table); 681 mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); 682 683 stats->n_hit = stats->n_missed = stats->n_lost = 0; 684 685 for_each_possible_cpu(i) { 686 const struct dp_stats_percpu *percpu_stats; 687 struct dp_stats_percpu local_stats; 688 unsigned int start; 689 690 percpu_stats = per_cpu_ptr(dp->stats_percpu, i); 691 692 do { 693 start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); 694 local_stats = *percpu_stats; 695 } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); 696 697 stats->n_hit += local_stats.n_hit; 698 stats->n_missed += local_stats.n_missed; 699 stats->n_lost += local_stats.n_lost; 700 mega_stats->n_mask_hit += local_stats.n_mask_hit; 701 } 702 } 703 704 static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) 705 { 706 return ovs_identifier_is_ufid(sfid) && 707 !(ufid_flags & OVS_UFID_F_OMIT_KEY); 708 } 709 710 static bool should_fill_mask(uint32_t ufid_flags) 711 { 712 return !(ufid_flags & OVS_UFID_F_OMIT_MASK); 713 } 714 715 static bool should_fill_actions(uint32_t ufid_flags) 716 { 717 return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); 718 } 719 720 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, 721 const struct sw_flow_id *sfid, 722 uint32_t ufid_flags) 723 { 724 size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); 725 726 /* OVS_FLOW_ATTR_UFID, or unmasked flow key as fallback 727 * see ovs_nla_put_identifier() 728 */ 729 if (sfid && ovs_identifier_is_ufid(sfid)) 730 len += nla_total_size(sfid->ufid_len); 731 else 732 len += nla_total_size(ovs_key_attr_size()); 733 734 /* OVS_FLOW_ATTR_KEY */ 735 if (!sfid || should_fill_key(sfid, ufid_flags)) 736 len += nla_total_size(ovs_key_attr_size()); 737 738 /* OVS_FLOW_ATTR_MASK */ 739 if (should_fill_mask(ufid_flags)) 740 len += nla_total_size(ovs_key_attr_size()); 741 742 /* OVS_FLOW_ATTR_ACTIONS */ 743 if (should_fill_actions(ufid_flags)) 744 len += nla_total_size(acts->orig_len); 745 746 return len 747 + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ 748 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ 749 + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ 750 } 751 752 /* Called with ovs_mutex or RCU read lock. */ 753 static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, 754 struct sk_buff *skb) 755 { 756 struct ovs_flow_stats stats; 757 __be16 tcp_flags; 758 unsigned long used; 759 760 ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); 761 762 if (used && 763 nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), 764 OVS_FLOW_ATTR_PAD)) 765 return -EMSGSIZE; 766 767 if (stats.n_packets && 768 nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, 769 sizeof(struct ovs_flow_stats), &stats, 770 OVS_FLOW_ATTR_PAD)) 771 return -EMSGSIZE; 772 773 if ((u8)ntohs(tcp_flags) && 774 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) 775 return -EMSGSIZE; 776 777 return 0; 778 } 779 780 /* Called with ovs_mutex or RCU read lock. */ 781 static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, 782 struct sk_buff *skb, int skb_orig_len) 783 { 784 struct nlattr *start; 785 int err; 786 787 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if 788 * this is the first flow to be dumped into 'skb'. This is unusual for 789 * Netlink but individual action lists can be longer than 790 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. 791 * The userspace caller can always fetch the actions separately if it 792 * really wants them. (Most userspace callers in fact don't care.) 793 * 794 * This can only fail for dump operations because the skb is always 795 * properly sized for single flows. 796 */ 797 start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS); 798 if (start) { 799 const struct sw_flow_actions *sf_acts; 800 801 sf_acts = rcu_dereference_ovsl(flow->sf_acts); 802 err = ovs_nla_put_actions(sf_acts->actions, 803 sf_acts->actions_len, skb); 804 805 if (!err) 806 nla_nest_end(skb, start); 807 else { 808 if (skb_orig_len) 809 return err; 810 811 nla_nest_cancel(skb, start); 812 } 813 } else if (skb_orig_len) { 814 return -EMSGSIZE; 815 } 816 817 return 0; 818 } 819 820 /* Called with ovs_mutex or RCU read lock. */ 821 static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, 822 struct sk_buff *skb, u32 portid, 823 u32 seq, u32 flags, u8 cmd, u32 ufid_flags) 824 { 825 const int skb_orig_len = skb->len; 826 struct ovs_header *ovs_header; 827 int err; 828 829 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, 830 flags, cmd); 831 if (!ovs_header) 832 return -EMSGSIZE; 833 834 ovs_header->dp_ifindex = dp_ifindex; 835 836 err = ovs_nla_put_identifier(flow, skb); 837 if (err) 838 goto error; 839 840 if (should_fill_key(&flow->id, ufid_flags)) { 841 err = ovs_nla_put_masked_key(flow, skb); 842 if (err) 843 goto error; 844 } 845 846 if (should_fill_mask(ufid_flags)) { 847 err = ovs_nla_put_mask(flow, skb); 848 if (err) 849 goto error; 850 } 851 852 err = ovs_flow_cmd_fill_stats(flow, skb); 853 if (err) 854 goto error; 855 856 if (should_fill_actions(ufid_flags)) { 857 err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); 858 if (err) 859 goto error; 860 } 861 862 genlmsg_end(skb, ovs_header); 863 return 0; 864 865 error: 866 genlmsg_cancel(skb, ovs_header); 867 return err; 868 } 869 870 /* May not be called with RCU read lock. */ 871 static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, 872 const struct sw_flow_id *sfid, 873 struct genl_info *info, 874 bool always, 875 uint32_t ufid_flags) 876 { 877 struct sk_buff *skb; 878 size_t len; 879 880 if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) 881 return NULL; 882 883 len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); 884 skb = genlmsg_new(len, GFP_KERNEL); 885 if (!skb) 886 return ERR_PTR(-ENOMEM); 887 888 return skb; 889 } 890 891 /* Called with ovs_mutex. */ 892 static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, 893 int dp_ifindex, 894 struct genl_info *info, u8 cmd, 895 bool always, u32 ufid_flags) 896 { 897 struct sk_buff *skb; 898 int retval; 899 900 skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), 901 &flow->id, info, always, ufid_flags); 902 if (IS_ERR_OR_NULL(skb)) 903 return skb; 904 905 retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, 906 info->snd_portid, info->snd_seq, 0, 907 cmd, ufid_flags); 908 if (WARN_ON_ONCE(retval < 0)) { 909 kfree_skb(skb); 910 skb = ERR_PTR(retval); 911 } 912 return skb; 913 } 914 915 static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) 916 { 917 struct net *net = sock_net(skb->sk); 918 struct nlattr **a = info->attrs; 919 struct ovs_header *ovs_header = info->userhdr; 920 struct sw_flow *flow = NULL, *new_flow; 921 struct sw_flow_mask mask; 922 struct sk_buff *reply; 923 struct datapath *dp; 924 struct sw_flow_actions *acts; 925 struct sw_flow_match match; 926 u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); 927 int error; 928 bool log = !a[OVS_FLOW_ATTR_PROBE]; 929 930 /* Must have key and actions. */ 931 error = -EINVAL; 932 if (!a[OVS_FLOW_ATTR_KEY]) { 933 OVS_NLERR(log, "Flow key attr not present in new flow."); 934 goto error; 935 } 936 if (!a[OVS_FLOW_ATTR_ACTIONS]) { 937 OVS_NLERR(log, "Flow actions attr not present in new flow."); 938 goto error; 939 } 940 941 /* Most of the time we need to allocate a new flow, do it before 942 * locking. 943 */ 944 new_flow = ovs_flow_alloc(); 945 if (IS_ERR(new_flow)) { 946 error = PTR_ERR(new_flow); 947 goto error; 948 } 949 950 /* Extract key. */ 951 ovs_match_init(&match, &new_flow->key, false, &mask); 952 error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], 953 a[OVS_FLOW_ATTR_MASK], log); 954 if (error) 955 goto err_kfree_flow; 956 957 /* Extract flow identifier. */ 958 error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], 959 &new_flow->key, log); 960 if (error) 961 goto err_kfree_flow; 962 963 /* unmasked key is needed to match when ufid is not used. */ 964 if (ovs_identifier_is_key(&new_flow->id)) 965 match.key = new_flow->id.unmasked_key; 966 967 ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); 968 969 /* Validate actions. */ 970 error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], 971 &new_flow->key, &acts, log); 972 if (error) { 973 OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); 974 goto err_kfree_flow; 975 } 976 977 reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, 978 ufid_flags); 979 if (IS_ERR(reply)) { 980 error = PTR_ERR(reply); 981 goto err_kfree_acts; 982 } 983 984 ovs_lock(); 985 dp = get_dp(net, ovs_header->dp_ifindex); 986 if (unlikely(!dp)) { 987 error = -ENODEV; 988 goto err_unlock_ovs; 989 } 990 991 /* Check if this is a duplicate flow */ 992 if (ovs_identifier_is_ufid(&new_flow->id)) 993 flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); 994 if (!flow) 995 flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); 996 if (likely(!flow)) { 997 rcu_assign_pointer(new_flow->sf_acts, acts); 998 999 /* Put flow in bucket. */ 1000 error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); 1001 if (unlikely(error)) { 1002 acts = NULL; 1003 goto err_unlock_ovs; 1004 } 1005 1006 if (unlikely(reply)) { 1007 error = ovs_flow_cmd_fill_info(new_flow, 1008 ovs_header->dp_ifindex, 1009 reply, info->snd_portid, 1010 info->snd_seq, 0, 1011 OVS_FLOW_CMD_NEW, 1012 ufid_flags); 1013 BUG_ON(error < 0); 1014 } 1015 ovs_unlock(); 1016 } else { 1017 struct sw_flow_actions *old_acts; 1018 1019 /* Bail out if we're not allowed to modify an existing flow. 1020 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL 1021 * because Generic Netlink treats the latter as a dump 1022 * request. We also accept NLM_F_EXCL in case that bug ever 1023 * gets fixed. 1024 */ 1025 if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE 1026 | NLM_F_EXCL))) { 1027 error = -EEXIST; 1028 goto err_unlock_ovs; 1029 } 1030 /* The flow identifier has to be the same for flow updates. 1031 * Look for any overlapping flow. 1032 */ 1033 if (unlikely(!ovs_flow_cmp(flow, &match))) { 1034 if (ovs_identifier_is_key(&flow->id)) 1035 flow = ovs_flow_tbl_lookup_exact(&dp->table, 1036 &match); 1037 else /* UFID matches but key is different */ 1038 flow = NULL; 1039 if (!flow) { 1040 error = -ENOENT; 1041 goto err_unlock_ovs; 1042 } 1043 } 1044 /* Update actions. */ 1045 old_acts = ovsl_dereference(flow->sf_acts); 1046 rcu_assign_pointer(flow->sf_acts, acts); 1047 1048 if (unlikely(reply)) { 1049 error = ovs_flow_cmd_fill_info(flow, 1050 ovs_header->dp_ifindex, 1051 reply, info->snd_portid, 1052 info->snd_seq, 0, 1053 OVS_FLOW_CMD_NEW, 1054 ufid_flags); 1055 BUG_ON(error < 0); 1056 } 1057 ovs_unlock(); 1058 1059 ovs_nla_free_flow_actions_rcu(old_acts); 1060 ovs_flow_free(new_flow, false); 1061 } 1062 1063 if (reply) 1064 ovs_notify(&dp_flow_genl_family, reply, info); 1065 return 0; 1066 1067 err_unlock_ovs: 1068 ovs_unlock(); 1069 kfree_skb(reply); 1070 err_kfree_acts: 1071 ovs_nla_free_flow_actions(acts); 1072 err_kfree_flow: 1073 ovs_flow_free(new_flow, false); 1074 error: 1075 return error; 1076 } 1077 1078 /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ 1079 static noinline_for_stack struct sw_flow_actions *get_flow_actions(struct net *net, 1080 const struct nlattr *a, 1081 const struct sw_flow_key *key, 1082 const struct sw_flow_mask *mask, 1083 bool log) 1084 { 1085 struct sw_flow_actions *acts; 1086 struct sw_flow_key masked_key; 1087 int error; 1088 1089 ovs_flow_mask_key(&masked_key, key, true, mask); 1090 error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); 1091 if (error) { 1092 OVS_NLERR(log, 1093 "Actions may not be safe on all matching packets"); 1094 return ERR_PTR(error); 1095 } 1096 1097 return acts; 1098 } 1099 1100 /* Factor out match-init and action-copy to avoid 1101 * "Wframe-larger-than=1024" warning. Because mask is only 1102 * used to get actions, we new a function to save some 1103 * stack space. 1104 * 1105 * If there are not key and action attrs, we return 0 1106 * directly. In the case, the caller will also not use the 1107 * match as before. If there is action attr, we try to get 1108 * actions and save them to *acts. Before returning from 1109 * the function, we reset the match->mask pointer. Because 1110 * we should not to return match object with dangling reference 1111 * to mask. 1112 * */ 1113 static noinline_for_stack int 1114 ovs_nla_init_match_and_action(struct net *net, 1115 struct sw_flow_match *match, 1116 struct sw_flow_key *key, 1117 struct nlattr **a, 1118 struct sw_flow_actions **acts, 1119 bool log) 1120 { 1121 struct sw_flow_mask mask; 1122 int error = 0; 1123 1124 if (a[OVS_FLOW_ATTR_KEY]) { 1125 ovs_match_init(match, key, true, &mask); 1126 error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], 1127 a[OVS_FLOW_ATTR_MASK], log); 1128 if (error) 1129 goto error; 1130 } 1131 1132 if (a[OVS_FLOW_ATTR_ACTIONS]) { 1133 if (!a[OVS_FLOW_ATTR_KEY]) { 1134 OVS_NLERR(log, 1135 "Flow key attribute not present in set flow."); 1136 error = -EINVAL; 1137 goto error; 1138 } 1139 1140 *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, 1141 &mask, log); 1142 if (IS_ERR(*acts)) { 1143 error = PTR_ERR(*acts); 1144 goto error; 1145 } 1146 } 1147 1148 /* On success, error is 0. */ 1149 error: 1150 match->mask = NULL; 1151 return error; 1152 } 1153 1154 static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) 1155 { 1156 struct net *net = sock_net(skb->sk); 1157 struct nlattr **a = info->attrs; 1158 struct ovs_header *ovs_header = info->userhdr; 1159 struct sw_flow_key key; 1160 struct sw_flow *flow; 1161 struct sk_buff *reply = NULL; 1162 struct datapath *dp; 1163 struct sw_flow_actions *old_acts = NULL, *acts = NULL; 1164 struct sw_flow_match match; 1165 struct sw_flow_id sfid; 1166 u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); 1167 int error = 0; 1168 bool log = !a[OVS_FLOW_ATTR_PROBE]; 1169 bool ufid_present; 1170 1171 ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); 1172 if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { 1173 OVS_NLERR(log, 1174 "Flow set message rejected, Key attribute missing."); 1175 return -EINVAL; 1176 } 1177 1178 error = ovs_nla_init_match_and_action(net, &match, &key, a, 1179 &acts, log); 1180 if (error) 1181 goto error; 1182 1183 if (acts) { 1184 /* Can allocate before locking if have acts. */ 1185 reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, 1186 ufid_flags); 1187 if (IS_ERR(reply)) { 1188 error = PTR_ERR(reply); 1189 goto err_kfree_acts; 1190 } 1191 } 1192 1193 ovs_lock(); 1194 dp = get_dp(net, ovs_header->dp_ifindex); 1195 if (unlikely(!dp)) { 1196 error = -ENODEV; 1197 goto err_unlock_ovs; 1198 } 1199 /* Check that the flow exists. */ 1200 if (ufid_present) 1201 flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); 1202 else 1203 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); 1204 if (unlikely(!flow)) { 1205 error = -ENOENT; 1206 goto err_unlock_ovs; 1207 } 1208 1209 /* Update actions, if present. */ 1210 if (likely(acts)) { 1211 old_acts = ovsl_dereference(flow->sf_acts); 1212 rcu_assign_pointer(flow->sf_acts, acts); 1213 1214 if (unlikely(reply)) { 1215 error = ovs_flow_cmd_fill_info(flow, 1216 ovs_header->dp_ifindex, 1217 reply, info->snd_portid, 1218 info->snd_seq, 0, 1219 OVS_FLOW_CMD_SET, 1220 ufid_flags); 1221 BUG_ON(error < 0); 1222 } 1223 } else { 1224 /* Could not alloc without acts before locking. */ 1225 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, 1226 info, OVS_FLOW_CMD_SET, false, 1227 ufid_flags); 1228 1229 if (IS_ERR(reply)) { 1230 error = PTR_ERR(reply); 1231 goto err_unlock_ovs; 1232 } 1233 } 1234 1235 /* Clear stats. */ 1236 if (a[OVS_FLOW_ATTR_CLEAR]) 1237 ovs_flow_stats_clear(flow); 1238 ovs_unlock(); 1239 1240 if (reply) 1241 ovs_notify(&dp_flow_genl_family, reply, info); 1242 if (old_acts) 1243 ovs_nla_free_flow_actions_rcu(old_acts); 1244 1245 return 0; 1246 1247 err_unlock_ovs: 1248 ovs_unlock(); 1249 kfree_skb(reply); 1250 err_kfree_acts: 1251 ovs_nla_free_flow_actions(acts); 1252 error: 1253 return error; 1254 } 1255 1256 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) 1257 { 1258 struct nlattr **a = info->attrs; 1259 struct ovs_header *ovs_header = info->userhdr; 1260 struct net *net = sock_net(skb->sk); 1261 struct sw_flow_key key; 1262 struct sk_buff *reply; 1263 struct sw_flow *flow; 1264 struct datapath *dp; 1265 struct sw_flow_match match; 1266 struct sw_flow_id ufid; 1267 u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); 1268 int err = 0; 1269 bool log = !a[OVS_FLOW_ATTR_PROBE]; 1270 bool ufid_present; 1271 1272 ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); 1273 if (a[OVS_FLOW_ATTR_KEY]) { 1274 ovs_match_init(&match, &key, true, NULL); 1275 err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, 1276 log); 1277 } else if (!ufid_present) { 1278 OVS_NLERR(log, 1279 "Flow get message rejected, Key attribute missing."); 1280 err = -EINVAL; 1281 } 1282 if (err) 1283 return err; 1284 1285 ovs_lock(); 1286 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); 1287 if (!dp) { 1288 err = -ENODEV; 1289 goto unlock; 1290 } 1291 1292 if (ufid_present) 1293 flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); 1294 else 1295 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); 1296 if (!flow) { 1297 err = -ENOENT; 1298 goto unlock; 1299 } 1300 1301 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, 1302 OVS_FLOW_CMD_GET, true, ufid_flags); 1303 if (IS_ERR(reply)) { 1304 err = PTR_ERR(reply); 1305 goto unlock; 1306 } 1307 1308 ovs_unlock(); 1309 return genlmsg_reply(reply, info); 1310 unlock: 1311 ovs_unlock(); 1312 return err; 1313 } 1314 1315 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) 1316 { 1317 struct nlattr **a = info->attrs; 1318 struct ovs_header *ovs_header = info->userhdr; 1319 struct net *net = sock_net(skb->sk); 1320 struct sw_flow_key key; 1321 struct sk_buff *reply; 1322 struct sw_flow *flow = NULL; 1323 struct datapath *dp; 1324 struct sw_flow_match match; 1325 struct sw_flow_id ufid; 1326 u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); 1327 int err; 1328 bool log = !a[OVS_FLOW_ATTR_PROBE]; 1329 bool ufid_present; 1330 1331 ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); 1332 if (a[OVS_FLOW_ATTR_KEY]) { 1333 ovs_match_init(&match, &key, true, NULL); 1334 err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], 1335 NULL, log); 1336 if (unlikely(err)) 1337 return err; 1338 } 1339 1340 ovs_lock(); 1341 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); 1342 if (unlikely(!dp)) { 1343 err = -ENODEV; 1344 goto unlock; 1345 } 1346 1347 if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { 1348 err = ovs_flow_tbl_flush(&dp->table); 1349 goto unlock; 1350 } 1351 1352 if (ufid_present) 1353 flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); 1354 else 1355 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); 1356 if (unlikely(!flow)) { 1357 err = -ENOENT; 1358 goto unlock; 1359 } 1360 1361 ovs_flow_tbl_remove(&dp->table, flow); 1362 ovs_unlock(); 1363 1364 reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, 1365 &flow->id, info, false, ufid_flags); 1366 if (likely(reply)) { 1367 if (!IS_ERR(reply)) { 1368 rcu_read_lock(); /*To keep RCU checker happy. */ 1369 err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, 1370 reply, info->snd_portid, 1371 info->snd_seq, 0, 1372 OVS_FLOW_CMD_DEL, 1373 ufid_flags); 1374 rcu_read_unlock(); 1375 if (WARN_ON_ONCE(err < 0)) { 1376 kfree_skb(reply); 1377 goto out_free; 1378 } 1379 1380 ovs_notify(&dp_flow_genl_family, reply, info); 1381 } else { 1382 netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); 1383 } 1384 } 1385 1386 out_free: 1387 ovs_flow_free(flow, true); 1388 return 0; 1389 unlock: 1390 ovs_unlock(); 1391 return err; 1392 } 1393 1394 static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) 1395 { 1396 struct nlattr *a[__OVS_FLOW_ATTR_MAX]; 1397 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); 1398 struct table_instance *ti; 1399 struct datapath *dp; 1400 u32 ufid_flags; 1401 int err; 1402 1403 err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a, 1404 OVS_FLOW_ATTR_MAX, flow_policy, NULL); 1405 if (err) 1406 return err; 1407 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); 1408 1409 rcu_read_lock(); 1410 dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); 1411 if (!dp) { 1412 rcu_read_unlock(); 1413 return -ENODEV; 1414 } 1415 1416 ti = rcu_dereference(dp->table.ti); 1417 for (;;) { 1418 struct sw_flow *flow; 1419 u32 bucket, obj; 1420 1421 bucket = cb->args[0]; 1422 obj = cb->args[1]; 1423 flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); 1424 if (!flow) 1425 break; 1426 1427 if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, 1428 NETLINK_CB(cb->skb).portid, 1429 cb->nlh->nlmsg_seq, NLM_F_MULTI, 1430 OVS_FLOW_CMD_GET, ufid_flags) < 0) 1431 break; 1432 1433 cb->args[0] = bucket; 1434 cb->args[1] = obj; 1435 } 1436 rcu_read_unlock(); 1437 return skb->len; 1438 } 1439 1440 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { 1441 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, 1442 [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, 1443 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, 1444 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, 1445 [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, 1446 [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, 1447 [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, 1448 }; 1449 1450 static const struct genl_ops dp_flow_genl_ops[] = { 1451 { .cmd = OVS_FLOW_CMD_NEW, 1452 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1453 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ 1454 .doit = ovs_flow_cmd_new 1455 }, 1456 { .cmd = OVS_FLOW_CMD_DEL, 1457 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1458 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ 1459 .doit = ovs_flow_cmd_del 1460 }, 1461 { .cmd = OVS_FLOW_CMD_GET, 1462 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1463 .flags = 0, /* OK for unprivileged users. */ 1464 .doit = ovs_flow_cmd_get, 1465 .dumpit = ovs_flow_cmd_dump 1466 }, 1467 { .cmd = OVS_FLOW_CMD_SET, 1468 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1469 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ 1470 .doit = ovs_flow_cmd_set, 1471 }, 1472 }; 1473 1474 static struct genl_family dp_flow_genl_family __ro_after_init = { 1475 .hdrsize = sizeof(struct ovs_header), 1476 .name = OVS_FLOW_FAMILY, 1477 .version = OVS_FLOW_VERSION, 1478 .maxattr = OVS_FLOW_ATTR_MAX, 1479 .policy = flow_policy, 1480 .netnsok = true, 1481 .parallel_ops = true, 1482 .ops = dp_flow_genl_ops, 1483 .n_ops = ARRAY_SIZE(dp_flow_genl_ops), 1484 .mcgrps = &ovs_dp_flow_multicast_group, 1485 .n_mcgrps = 1, 1486 .module = THIS_MODULE, 1487 }; 1488 1489 static size_t ovs_dp_cmd_msg_size(void) 1490 { 1491 size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); 1492 1493 msgsize += nla_total_size(IFNAMSIZ); 1494 msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); 1495 msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); 1496 msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ 1497 1498 return msgsize; 1499 } 1500 1501 /* Called with ovs_mutex. */ 1502 static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, 1503 u32 portid, u32 seq, u32 flags, u8 cmd) 1504 { 1505 struct ovs_header *ovs_header; 1506 struct ovs_dp_stats dp_stats; 1507 struct ovs_dp_megaflow_stats dp_megaflow_stats; 1508 int err; 1509 1510 ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, 1511 flags, cmd); 1512 if (!ovs_header) 1513 goto error; 1514 1515 ovs_header->dp_ifindex = get_dpifindex(dp); 1516 1517 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); 1518 if (err) 1519 goto nla_put_failure; 1520 1521 get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); 1522 if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), 1523 &dp_stats, OVS_DP_ATTR_PAD)) 1524 goto nla_put_failure; 1525 1526 if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, 1527 sizeof(struct ovs_dp_megaflow_stats), 1528 &dp_megaflow_stats, OVS_DP_ATTR_PAD)) 1529 goto nla_put_failure; 1530 1531 if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) 1532 goto nla_put_failure; 1533 1534 genlmsg_end(skb, ovs_header); 1535 return 0; 1536 1537 nla_put_failure: 1538 genlmsg_cancel(skb, ovs_header); 1539 error: 1540 return -EMSGSIZE; 1541 } 1542 1543 static struct sk_buff *ovs_dp_cmd_alloc_info(void) 1544 { 1545 return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); 1546 } 1547 1548 /* Called with rcu_read_lock or ovs_mutex. */ 1549 static struct datapath *lookup_datapath(struct net *net, 1550 const struct ovs_header *ovs_header, 1551 struct nlattr *a[OVS_DP_ATTR_MAX + 1]) 1552 { 1553 struct datapath *dp; 1554 1555 if (!a[OVS_DP_ATTR_NAME]) 1556 dp = get_dp(net, ovs_header->dp_ifindex); 1557 else { 1558 struct vport *vport; 1559 1560 vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); 1561 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; 1562 } 1563 return dp ? dp : ERR_PTR(-ENODEV); 1564 } 1565 1566 static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) 1567 { 1568 struct datapath *dp; 1569 1570 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); 1571 if (IS_ERR(dp)) 1572 return; 1573 1574 WARN(dp->user_features, "Dropping previously announced user features\n"); 1575 dp->user_features = 0; 1576 } 1577 1578 DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support); 1579 1580 static int ovs_dp_change(struct datapath *dp, struct nlattr *a[]) 1581 { 1582 u32 user_features = 0; 1583 1584 if (a[OVS_DP_ATTR_USER_FEATURES]) { 1585 user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); 1586 1587 if (user_features & ~(OVS_DP_F_VPORT_PIDS | 1588 OVS_DP_F_UNALIGNED | 1589 OVS_DP_F_TC_RECIRC_SHARING)) 1590 return -EOPNOTSUPP; 1591 1592 #if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT) 1593 if (user_features & OVS_DP_F_TC_RECIRC_SHARING) 1594 return -EOPNOTSUPP; 1595 #endif 1596 } 1597 1598 dp->user_features = user_features; 1599 1600 if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) 1601 static_branch_enable(&tc_recirc_sharing_support); 1602 else 1603 static_branch_disable(&tc_recirc_sharing_support); 1604 1605 return 0; 1606 } 1607 1608 static int ovs_dp_stats_init(struct datapath *dp) 1609 { 1610 dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); 1611 if (!dp->stats_percpu) 1612 return -ENOMEM; 1613 1614 return 0; 1615 } 1616 1617 static int ovs_dp_vport_init(struct datapath *dp) 1618 { 1619 int i; 1620 1621 dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, 1622 sizeof(struct hlist_head), 1623 GFP_KERNEL); 1624 if (!dp->ports) 1625 return -ENOMEM; 1626 1627 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) 1628 INIT_HLIST_HEAD(&dp->ports[i]); 1629 1630 return 0; 1631 } 1632 1633 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) 1634 { 1635 struct nlattr **a = info->attrs; 1636 struct vport_parms parms; 1637 struct sk_buff *reply; 1638 struct datapath *dp; 1639 struct vport *vport; 1640 struct ovs_net *ovs_net; 1641 int err; 1642 1643 err = -EINVAL; 1644 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) 1645 goto err; 1646 1647 reply = ovs_dp_cmd_alloc_info(); 1648 if (!reply) 1649 return -ENOMEM; 1650 1651 err = -ENOMEM; 1652 dp = kzalloc(sizeof(*dp), GFP_KERNEL); 1653 if (dp == NULL) 1654 goto err_destroy_reply; 1655 1656 ovs_dp_set_net(dp, sock_net(skb->sk)); 1657 1658 /* Allocate table. */ 1659 err = ovs_flow_tbl_init(&dp->table); 1660 if (err) 1661 goto err_destroy_dp; 1662 1663 err = ovs_dp_stats_init(dp); 1664 if (err) 1665 goto err_destroy_table; 1666 1667 err = ovs_dp_vport_init(dp); 1668 if (err) 1669 goto err_destroy_stats; 1670 1671 err = ovs_meters_init(dp); 1672 if (err) 1673 goto err_destroy_ports; 1674 1675 /* Set up our datapath device. */ 1676 parms.name = nla_data(a[OVS_DP_ATTR_NAME]); 1677 parms.type = OVS_VPORT_TYPE_INTERNAL; 1678 parms.options = NULL; 1679 parms.dp = dp; 1680 parms.port_no = OVSP_LOCAL; 1681 parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; 1682 1683 err = ovs_dp_change(dp, a); 1684 if (err) 1685 goto err_destroy_meters; 1686 1687 /* So far only local changes have been made, now need the lock. */ 1688 ovs_lock(); 1689 1690 vport = new_vport(&parms); 1691 if (IS_ERR(vport)) { 1692 err = PTR_ERR(vport); 1693 if (err == -EBUSY) 1694 err = -EEXIST; 1695 1696 if (err == -EEXIST) { 1697 /* An outdated user space instance that does not understand 1698 * the concept of user_features has attempted to create a new 1699 * datapath and is likely to reuse it. Drop all user features. 1700 */ 1701 if (info->genlhdr->version < OVS_DP_VER_FEATURES) 1702 ovs_dp_reset_user_features(skb, info); 1703 } 1704 1705 ovs_unlock(); 1706 goto err_destroy_meters; 1707 } 1708 1709 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, 1710 info->snd_seq, 0, OVS_DP_CMD_NEW); 1711 BUG_ON(err < 0); 1712 1713 ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); 1714 list_add_tail_rcu(&dp->list_node, &ovs_net->dps); 1715 1716 ovs_unlock(); 1717 1718 ovs_notify(&dp_datapath_genl_family, reply, info); 1719 return 0; 1720 1721 err_destroy_meters: 1722 ovs_meters_exit(dp); 1723 err_destroy_ports: 1724 kfree(dp->ports); 1725 err_destroy_stats: 1726 free_percpu(dp->stats_percpu); 1727 err_destroy_table: 1728 ovs_flow_tbl_destroy(&dp->table); 1729 err_destroy_dp: 1730 kfree(dp); 1731 err_destroy_reply: 1732 kfree_skb(reply); 1733 err: 1734 return err; 1735 } 1736 1737 /* Called with ovs_mutex. */ 1738 static void __dp_destroy(struct datapath *dp) 1739 { 1740 int i; 1741 1742 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { 1743 struct vport *vport; 1744 struct hlist_node *n; 1745 1746 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) 1747 if (vport->port_no != OVSP_LOCAL) 1748 ovs_dp_detach_port(vport); 1749 } 1750 1751 list_del_rcu(&dp->list_node); 1752 1753 /* OVSP_LOCAL is datapath internal port. We need to make sure that 1754 * all ports in datapath are destroyed first before freeing datapath. 1755 */ 1756 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); 1757 1758 /* RCU destroy the flow table */ 1759 call_rcu(&dp->rcu, destroy_dp_rcu); 1760 } 1761 1762 static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) 1763 { 1764 struct sk_buff *reply; 1765 struct datapath *dp; 1766 int err; 1767 1768 reply = ovs_dp_cmd_alloc_info(); 1769 if (!reply) 1770 return -ENOMEM; 1771 1772 ovs_lock(); 1773 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); 1774 err = PTR_ERR(dp); 1775 if (IS_ERR(dp)) 1776 goto err_unlock_free; 1777 1778 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, 1779 info->snd_seq, 0, OVS_DP_CMD_DEL); 1780 BUG_ON(err < 0); 1781 1782 __dp_destroy(dp); 1783 ovs_unlock(); 1784 1785 ovs_notify(&dp_datapath_genl_family, reply, info); 1786 1787 return 0; 1788 1789 err_unlock_free: 1790 ovs_unlock(); 1791 kfree_skb(reply); 1792 return err; 1793 } 1794 1795 static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) 1796 { 1797 struct sk_buff *reply; 1798 struct datapath *dp; 1799 int err; 1800 1801 reply = ovs_dp_cmd_alloc_info(); 1802 if (!reply) 1803 return -ENOMEM; 1804 1805 ovs_lock(); 1806 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); 1807 err = PTR_ERR(dp); 1808 if (IS_ERR(dp)) 1809 goto err_unlock_free; 1810 1811 err = ovs_dp_change(dp, info->attrs); 1812 if (err) 1813 goto err_unlock_free; 1814 1815 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, 1816 info->snd_seq, 0, OVS_DP_CMD_SET); 1817 BUG_ON(err < 0); 1818 1819 ovs_unlock(); 1820 ovs_notify(&dp_datapath_genl_family, reply, info); 1821 1822 return 0; 1823 1824 err_unlock_free: 1825 ovs_unlock(); 1826 kfree_skb(reply); 1827 return err; 1828 } 1829 1830 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) 1831 { 1832 struct sk_buff *reply; 1833 struct datapath *dp; 1834 int err; 1835 1836 reply = ovs_dp_cmd_alloc_info(); 1837 if (!reply) 1838 return -ENOMEM; 1839 1840 ovs_lock(); 1841 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); 1842 if (IS_ERR(dp)) { 1843 err = PTR_ERR(dp); 1844 goto err_unlock_free; 1845 } 1846 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, 1847 info->snd_seq, 0, OVS_DP_CMD_GET); 1848 BUG_ON(err < 0); 1849 ovs_unlock(); 1850 1851 return genlmsg_reply(reply, info); 1852 1853 err_unlock_free: 1854 ovs_unlock(); 1855 kfree_skb(reply); 1856 return err; 1857 } 1858 1859 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) 1860 { 1861 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); 1862 struct datapath *dp; 1863 int skip = cb->args[0]; 1864 int i = 0; 1865 1866 ovs_lock(); 1867 list_for_each_entry(dp, &ovs_net->dps, list_node) { 1868 if (i >= skip && 1869 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, 1870 cb->nlh->nlmsg_seq, NLM_F_MULTI, 1871 OVS_DP_CMD_GET) < 0) 1872 break; 1873 i++; 1874 } 1875 ovs_unlock(); 1876 1877 cb->args[0] = i; 1878 1879 return skb->len; 1880 } 1881 1882 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { 1883 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, 1884 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, 1885 [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, 1886 }; 1887 1888 static const struct genl_ops dp_datapath_genl_ops[] = { 1889 { .cmd = OVS_DP_CMD_NEW, 1890 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1891 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ 1892 .doit = ovs_dp_cmd_new 1893 }, 1894 { .cmd = OVS_DP_CMD_DEL, 1895 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1896 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ 1897 .doit = ovs_dp_cmd_del 1898 }, 1899 { .cmd = OVS_DP_CMD_GET, 1900 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1901 .flags = 0, /* OK for unprivileged users. */ 1902 .doit = ovs_dp_cmd_get, 1903 .dumpit = ovs_dp_cmd_dump 1904 }, 1905 { .cmd = OVS_DP_CMD_SET, 1906 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1907 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ 1908 .doit = ovs_dp_cmd_set, 1909 }, 1910 }; 1911 1912 static struct genl_family dp_datapath_genl_family __ro_after_init = { 1913 .hdrsize = sizeof(struct ovs_header), 1914 .name = OVS_DATAPATH_FAMILY, 1915 .version = OVS_DATAPATH_VERSION, 1916 .maxattr = OVS_DP_ATTR_MAX, 1917 .policy = datapath_policy, 1918 .netnsok = true, 1919 .parallel_ops = true, 1920 .ops = dp_datapath_genl_ops, 1921 .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), 1922 .mcgrps = &ovs_dp_datapath_multicast_group, 1923 .n_mcgrps = 1, 1924 .module = THIS_MODULE, 1925 }; 1926 1927 /* Called with ovs_mutex or RCU read lock. */ 1928 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, 1929 struct net *net, u32 portid, u32 seq, 1930 u32 flags, u8 cmd, gfp_t gfp) 1931 { 1932 struct ovs_header *ovs_header; 1933 struct ovs_vport_stats vport_stats; 1934 int err; 1935 1936 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, 1937 flags, cmd); 1938 if (!ovs_header) 1939 return -EMSGSIZE; 1940 1941 ovs_header->dp_ifindex = get_dpifindex(vport->dp); 1942 1943 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || 1944 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || 1945 nla_put_string(skb, OVS_VPORT_ATTR_NAME, 1946 ovs_vport_name(vport)) || 1947 nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) 1948 goto nla_put_failure; 1949 1950 if (!net_eq(net, dev_net(vport->dev))) { 1951 int id = peernet2id_alloc(net, dev_net(vport->dev), gfp); 1952 1953 if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) 1954 goto nla_put_failure; 1955 } 1956 1957 ovs_vport_get_stats(vport, &vport_stats); 1958 if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, 1959 sizeof(struct ovs_vport_stats), &vport_stats, 1960 OVS_VPORT_ATTR_PAD)) 1961 goto nla_put_failure; 1962 1963 if (ovs_vport_get_upcall_portids(vport, skb)) 1964 goto nla_put_failure; 1965 1966 err = ovs_vport_get_options(vport, skb); 1967 if (err == -EMSGSIZE) 1968 goto error; 1969 1970 genlmsg_end(skb, ovs_header); 1971 return 0; 1972 1973 nla_put_failure: 1974 err = -EMSGSIZE; 1975 error: 1976 genlmsg_cancel(skb, ovs_header); 1977 return err; 1978 } 1979 1980 static struct sk_buff *ovs_vport_cmd_alloc_info(void) 1981 { 1982 return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1983 } 1984 1985 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ 1986 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, 1987 u32 portid, u32 seq, u8 cmd) 1988 { 1989 struct sk_buff *skb; 1990 int retval; 1991 1992 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1993 if (!skb) 1994 return ERR_PTR(-ENOMEM); 1995 1996 retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd, 1997 GFP_KERNEL); 1998 BUG_ON(retval < 0); 1999 2000 return skb; 2001 } 2002 2003 /* Called with ovs_mutex or RCU read lock. */ 2004 static struct vport *lookup_vport(struct net *net, 2005 const struct ovs_header *ovs_header, 2006 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) 2007 { 2008 struct datapath *dp; 2009 struct vport *vport; 2010 2011 if (a[OVS_VPORT_ATTR_IFINDEX]) 2012 return ERR_PTR(-EOPNOTSUPP); 2013 if (a[OVS_VPORT_ATTR_NAME]) { 2014 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); 2015 if (!vport) 2016 return ERR_PTR(-ENODEV); 2017 if (ovs_header->dp_ifindex && 2018 ovs_header->dp_ifindex != get_dpifindex(vport->dp)) 2019 return ERR_PTR(-ENODEV); 2020 return vport; 2021 } else if (a[OVS_VPORT_ATTR_PORT_NO]) { 2022 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); 2023 2024 if (port_no >= DP_MAX_PORTS) 2025 return ERR_PTR(-EFBIG); 2026 2027 dp = get_dp(net, ovs_header->dp_ifindex); 2028 if (!dp) 2029 return ERR_PTR(-ENODEV); 2030 2031 vport = ovs_vport_ovsl_rcu(dp, port_no); 2032 if (!vport) 2033 return ERR_PTR(-ENODEV); 2034 return vport; 2035 } else 2036 return ERR_PTR(-EINVAL); 2037 2038 } 2039 2040 static unsigned int ovs_get_max_headroom(struct datapath *dp) 2041 { 2042 unsigned int dev_headroom, max_headroom = 0; 2043 struct net_device *dev; 2044 struct vport *vport; 2045 int i; 2046 2047 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { 2048 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { 2049 dev = vport->dev; 2050 dev_headroom = netdev_get_fwd_headroom(dev); 2051 if (dev_headroom > max_headroom) 2052 max_headroom = dev_headroom; 2053 } 2054 } 2055 2056 return max_headroom; 2057 } 2058 2059 /* Called with ovs_mutex */ 2060 static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom) 2061 { 2062 struct vport *vport; 2063 int i; 2064 2065 dp->max_headroom = new_headroom; 2066 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) 2067 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) 2068 netdev_set_rx_headroom(vport->dev, new_headroom); 2069 } 2070 2071 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) 2072 { 2073 struct nlattr **a = info->attrs; 2074 struct ovs_header *ovs_header = info->userhdr; 2075 struct vport_parms parms; 2076 struct sk_buff *reply; 2077 struct vport *vport; 2078 struct datapath *dp; 2079 unsigned int new_headroom; 2080 u32 port_no; 2081 int err; 2082 2083 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || 2084 !a[OVS_VPORT_ATTR_UPCALL_PID]) 2085 return -EINVAL; 2086 if (a[OVS_VPORT_ATTR_IFINDEX]) 2087 return -EOPNOTSUPP; 2088 2089 port_no = a[OVS_VPORT_ATTR_PORT_NO] 2090 ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; 2091 if (port_no >= DP_MAX_PORTS) 2092 return -EFBIG; 2093 2094 reply = ovs_vport_cmd_alloc_info(); 2095 if (!reply) 2096 return -ENOMEM; 2097 2098 ovs_lock(); 2099 restart: 2100 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); 2101 err = -ENODEV; 2102 if (!dp) 2103 goto exit_unlock_free; 2104 2105 if (port_no) { 2106 vport = ovs_vport_ovsl(dp, port_no); 2107 err = -EBUSY; 2108 if (vport) 2109 goto exit_unlock_free; 2110 } else { 2111 for (port_no = 1; ; port_no++) { 2112 if (port_no >= DP_MAX_PORTS) { 2113 err = -EFBIG; 2114 goto exit_unlock_free; 2115 } 2116 vport = ovs_vport_ovsl(dp, port_no); 2117 if (!vport) 2118 break; 2119 } 2120 } 2121 2122 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); 2123 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); 2124 parms.options = a[OVS_VPORT_ATTR_OPTIONS]; 2125 parms.dp = dp; 2126 parms.port_no = port_no; 2127 parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; 2128 2129 vport = new_vport(&parms); 2130 err = PTR_ERR(vport); 2131 if (IS_ERR(vport)) { 2132 if (err == -EAGAIN) 2133 goto restart; 2134 goto exit_unlock_free; 2135 } 2136 2137 err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), 2138 info->snd_portid, info->snd_seq, 0, 2139 OVS_VPORT_CMD_NEW, GFP_KERNEL); 2140 2141 new_headroom = netdev_get_fwd_headroom(vport->dev); 2142 2143 if (new_headroom > dp->max_headroom) 2144 ovs_update_headroom(dp, new_headroom); 2145 else 2146 netdev_set_rx_headroom(vport->dev, dp->max_headroom); 2147 2148 BUG_ON(err < 0); 2149 ovs_unlock(); 2150 2151 ovs_notify(&dp_vport_genl_family, reply, info); 2152 return 0; 2153 2154 exit_unlock_free: 2155 ovs_unlock(); 2156 kfree_skb(reply); 2157 return err; 2158 } 2159 2160 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) 2161 { 2162 struct nlattr **a = info->attrs; 2163 struct sk_buff *reply; 2164 struct vport *vport; 2165 int err; 2166 2167 reply = ovs_vport_cmd_alloc_info(); 2168 if (!reply) 2169 return -ENOMEM; 2170 2171 ovs_lock(); 2172 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); 2173 err = PTR_ERR(vport); 2174 if (IS_ERR(vport)) 2175 goto exit_unlock_free; 2176 2177 if (a[OVS_VPORT_ATTR_TYPE] && 2178 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { 2179 err = -EINVAL; 2180 goto exit_unlock_free; 2181 } 2182 2183 if (a[OVS_VPORT_ATTR_OPTIONS]) { 2184 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); 2185 if (err) 2186 goto exit_unlock_free; 2187 } 2188 2189 2190 if (a[OVS_VPORT_ATTR_UPCALL_PID]) { 2191 struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; 2192 2193 err = ovs_vport_set_upcall_portids(vport, ids); 2194 if (err) 2195 goto exit_unlock_free; 2196 } 2197 2198 err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), 2199 info->snd_portid, info->snd_seq, 0, 2200 OVS_VPORT_CMD_SET, GFP_KERNEL); 2201 BUG_ON(err < 0); 2202 2203 ovs_unlock(); 2204 ovs_notify(&dp_vport_genl_family, reply, info); 2205 return 0; 2206 2207 exit_unlock_free: 2208 ovs_unlock(); 2209 kfree_skb(reply); 2210 return err; 2211 } 2212 2213 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) 2214 { 2215 bool update_headroom = false; 2216 struct nlattr **a = info->attrs; 2217 struct sk_buff *reply; 2218 struct datapath *dp; 2219 struct vport *vport; 2220 unsigned int new_headroom; 2221 int err; 2222 2223 reply = ovs_vport_cmd_alloc_info(); 2224 if (!reply) 2225 return -ENOMEM; 2226 2227 ovs_lock(); 2228 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); 2229 err = PTR_ERR(vport); 2230 if (IS_ERR(vport)) 2231 goto exit_unlock_free; 2232 2233 if (vport->port_no == OVSP_LOCAL) { 2234 err = -EINVAL; 2235 goto exit_unlock_free; 2236 } 2237 2238 err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), 2239 info->snd_portid, info->snd_seq, 0, 2240 OVS_VPORT_CMD_DEL, GFP_KERNEL); 2241 BUG_ON(err < 0); 2242 2243 /* the vport deletion may trigger dp headroom update */ 2244 dp = vport->dp; 2245 if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) 2246 update_headroom = true; 2247 2248 netdev_reset_rx_headroom(vport->dev); 2249 ovs_dp_detach_port(vport); 2250 2251 if (update_headroom) { 2252 new_headroom = ovs_get_max_headroom(dp); 2253 2254 if (new_headroom < dp->max_headroom) 2255 ovs_update_headroom(dp, new_headroom); 2256 } 2257 ovs_unlock(); 2258 2259 ovs_notify(&dp_vport_genl_family, reply, info); 2260 return 0; 2261 2262 exit_unlock_free: 2263 ovs_unlock(); 2264 kfree_skb(reply); 2265 return err; 2266 } 2267 2268 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) 2269 { 2270 struct nlattr **a = info->attrs; 2271 struct ovs_header *ovs_header = info->userhdr; 2272 struct sk_buff *reply; 2273 struct vport *vport; 2274 int err; 2275 2276 reply = ovs_vport_cmd_alloc_info(); 2277 if (!reply) 2278 return -ENOMEM; 2279 2280 rcu_read_lock(); 2281 vport = lookup_vport(sock_net(skb->sk), ovs_header, a); 2282 err = PTR_ERR(vport); 2283 if (IS_ERR(vport)) 2284 goto exit_unlock_free; 2285 err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), 2286 info->snd_portid, info->snd_seq, 0, 2287 OVS_VPORT_CMD_GET, GFP_ATOMIC); 2288 BUG_ON(err < 0); 2289 rcu_read_unlock(); 2290 2291 return genlmsg_reply(reply, info); 2292 2293 exit_unlock_free: 2294 rcu_read_unlock(); 2295 kfree_skb(reply); 2296 return err; 2297 } 2298 2299 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) 2300 { 2301 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); 2302 struct datapath *dp; 2303 int bucket = cb->args[0], skip = cb->args[1]; 2304 int i, j = 0; 2305 2306 rcu_read_lock(); 2307 dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); 2308 if (!dp) { 2309 rcu_read_unlock(); 2310 return -ENODEV; 2311 } 2312 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { 2313 struct vport *vport; 2314 2315 j = 0; 2316 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { 2317 if (j >= skip && 2318 ovs_vport_cmd_fill_info(vport, skb, 2319 sock_net(skb->sk), 2320 NETLINK_CB(cb->skb).portid, 2321 cb->nlh->nlmsg_seq, 2322 NLM_F_MULTI, 2323 OVS_VPORT_CMD_GET, 2324 GFP_ATOMIC) < 0) 2325 goto out; 2326 2327 j++; 2328 } 2329 skip = 0; 2330 } 2331 out: 2332 rcu_read_unlock(); 2333 2334 cb->args[0] = i; 2335 cb->args[1] = j; 2336 2337 return skb->len; 2338 } 2339 2340 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { 2341 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, 2342 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, 2343 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, 2344 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, 2345 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_UNSPEC }, 2346 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, 2347 [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, 2348 [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, 2349 }; 2350 2351 static const struct genl_ops dp_vport_genl_ops[] = { 2352 { .cmd = OVS_VPORT_CMD_NEW, 2353 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2354 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ 2355 .doit = ovs_vport_cmd_new 2356 }, 2357 { .cmd = OVS_VPORT_CMD_DEL, 2358 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2359 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ 2360 .doit = ovs_vport_cmd_del 2361 }, 2362 { .cmd = OVS_VPORT_CMD_GET, 2363 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2364 .flags = 0, /* OK for unprivileged users. */ 2365 .doit = ovs_vport_cmd_get, 2366 .dumpit = ovs_vport_cmd_dump 2367 }, 2368 { .cmd = OVS_VPORT_CMD_SET, 2369 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2370 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ 2371 .doit = ovs_vport_cmd_set, 2372 }, 2373 }; 2374 2375 struct genl_family dp_vport_genl_family __ro_after_init = { 2376 .hdrsize = sizeof(struct ovs_header), 2377 .name = OVS_VPORT_FAMILY, 2378 .version = OVS_VPORT_VERSION, 2379 .maxattr = OVS_VPORT_ATTR_MAX, 2380 .policy = vport_policy, 2381 .netnsok = true, 2382 .parallel_ops = true, 2383 .ops = dp_vport_genl_ops, 2384 .n_ops = ARRAY_SIZE(dp_vport_genl_ops), 2385 .mcgrps = &ovs_dp_vport_multicast_group, 2386 .n_mcgrps = 1, 2387 .module = THIS_MODULE, 2388 }; 2389 2390 static struct genl_family * const dp_genl_families[] = { 2391 &dp_datapath_genl_family, 2392 &dp_vport_genl_family, 2393 &dp_flow_genl_family, 2394 &dp_packet_genl_family, 2395 &dp_meter_genl_family, 2396 #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 2397 &dp_ct_limit_genl_family, 2398 #endif 2399 }; 2400 2401 static void dp_unregister_genl(int n_families) 2402 { 2403 int i; 2404 2405 for (i = 0; i < n_families; i++) 2406 genl_unregister_family(dp_genl_families[i]); 2407 } 2408 2409 static int __init dp_register_genl(void) 2410 { 2411 int err; 2412 int i; 2413 2414 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { 2415 2416 err = genl_register_family(dp_genl_families[i]); 2417 if (err) 2418 goto error; 2419 } 2420 2421 return 0; 2422 2423 error: 2424 dp_unregister_genl(i); 2425 return err; 2426 } 2427 2428 static int __net_init ovs_init_net(struct net *net) 2429 { 2430 struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 2431 2432 INIT_LIST_HEAD(&ovs_net->dps); 2433 INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); 2434 return ovs_ct_init(net); 2435 } 2436 2437 static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, 2438 struct list_head *head) 2439 { 2440 struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 2441 struct datapath *dp; 2442 2443 list_for_each_entry(dp, &ovs_net->dps, list_node) { 2444 int i; 2445 2446 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { 2447 struct vport *vport; 2448 2449 hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { 2450 if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) 2451 continue; 2452 2453 if (dev_net(vport->dev) == dnet) 2454 list_add(&vport->detach_list, head); 2455 } 2456 } 2457 } 2458 } 2459 2460 static void __net_exit ovs_exit_net(struct net *dnet) 2461 { 2462 struct datapath *dp, *dp_next; 2463 struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); 2464 struct vport *vport, *vport_next; 2465 struct net *net; 2466 LIST_HEAD(head); 2467 2468 ovs_ct_exit(dnet); 2469 ovs_lock(); 2470 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) 2471 __dp_destroy(dp); 2472 2473 down_read(&net_rwsem); 2474 for_each_net(net) 2475 list_vports_from_net(net, dnet, &head); 2476 up_read(&net_rwsem); 2477 2478 /* Detach all vports from given namespace. */ 2479 list_for_each_entry_safe(vport, vport_next, &head, detach_list) { 2480 list_del(&vport->detach_list); 2481 ovs_dp_detach_port(vport); 2482 } 2483 2484 ovs_unlock(); 2485 2486 cancel_work_sync(&ovs_net->dp_notify_work); 2487 } 2488 2489 static struct pernet_operations ovs_net_ops = { 2490 .init = ovs_init_net, 2491 .exit = ovs_exit_net, 2492 .id = &ovs_net_id, 2493 .size = sizeof(struct ovs_net), 2494 }; 2495 2496 static int __init dp_init(void) 2497 { 2498 int err; 2499 2500 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof_field(struct sk_buff, cb)); 2501 2502 pr_info("Open vSwitch switching datapath\n"); 2503 2504 err = action_fifos_init(); 2505 if (err) 2506 goto error; 2507 2508 err = ovs_internal_dev_rtnl_link_register(); 2509 if (err) 2510 goto error_action_fifos_exit; 2511 2512 err = ovs_flow_init(); 2513 if (err) 2514 goto error_unreg_rtnl_link; 2515 2516 err = ovs_vport_init(); 2517 if (err) 2518 goto error_flow_exit; 2519 2520 err = register_pernet_device(&ovs_net_ops); 2521 if (err) 2522 goto error_vport_exit; 2523 2524 err = register_netdevice_notifier(&ovs_dp_device_notifier); 2525 if (err) 2526 goto error_netns_exit; 2527 2528 err = ovs_netdev_init(); 2529 if (err) 2530 goto error_unreg_notifier; 2531 2532 err = dp_register_genl(); 2533 if (err < 0) 2534 goto error_unreg_netdev; 2535 2536 return 0; 2537 2538 error_unreg_netdev: 2539 ovs_netdev_exit(); 2540 error_unreg_notifier: 2541 unregister_netdevice_notifier(&ovs_dp_device_notifier); 2542 error_netns_exit: 2543 unregister_pernet_device(&ovs_net_ops); 2544 error_vport_exit: 2545 ovs_vport_exit(); 2546 error_flow_exit: 2547 ovs_flow_exit(); 2548 error_unreg_rtnl_link: 2549 ovs_internal_dev_rtnl_link_unregister(); 2550 error_action_fifos_exit: 2551 action_fifos_exit(); 2552 error: 2553 return err; 2554 } 2555 2556 static void dp_cleanup(void) 2557 { 2558 dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); 2559 ovs_netdev_exit(); 2560 unregister_netdevice_notifier(&ovs_dp_device_notifier); 2561 unregister_pernet_device(&ovs_net_ops); 2562 rcu_barrier(); 2563 ovs_vport_exit(); 2564 ovs_flow_exit(); 2565 ovs_internal_dev_rtnl_link_unregister(); 2566 action_fifos_exit(); 2567 } 2568 2569 module_init(dp_init); 2570 module_exit(dp_cleanup); 2571 2572 MODULE_DESCRIPTION("Open vSwitch switching datapath"); 2573 MODULE_LICENSE("GPL"); 2574 MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); 2575 MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); 2576 MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); 2577 MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); 2578 MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); 2579 MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); 2580