2 * Copyright (c) 2007-2013 Nicira, Inc.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21 #include <linux/init.h>
22 #include <linux/module.h>
23 #include <linux/if_arp.h>
24 #include <linux/if_vlan.h>
27 #include <linux/jhash.h>
28 #include <linux/delay.h>
29 #include <linux/time.h>
30 #include <linux/etherdevice.h>
31 #include <linux/genetlink.h>
32 #include <linux/kernel.h>
33 #include <linux/kthread.h>
34 #include <linux/mutex.h>
35 #include <linux/percpu.h>
36 #include <linux/rcupdate.h>
37 #include <linux/tcp.h>
38 #include <linux/udp.h>
39 #include <linux/version.h>
40 #include <linux/ethtool.h>
41 #include <linux/wait.h>
42 #include <asm/div64.h>
43 #include <linux/highmem.h>
44 #include <linux/netfilter_bridge.h>
45 #include <linux/netfilter_ipv4.h>
46 #include <linux/inetdevice.h>
47 #include <linux/list.h>
48 #include <linux/openvswitch.h>
49 #include <linux/rculist.h>
50 #include <linux/dmi.h>
51 #include <linux/genetlink.h>
52 #include <net/genetlink.h>
53 #include <net/genetlink.h>
54 #include <net/net_namespace.h>
55 #include <net/netns/generic.h>
59 #include "flow_table.h"
60 #include "flow_netlink.h"
62 #include "vport-internal_dev.h"
63 #include "vport-netdev.h"
65 int ovs_net_id __read_mostly;
67 static void ovs_notify(struct sk_buff *skb, struct genl_info *info,
68 struct genl_multicast_group *grp)
70 genl_notify(skb, genl_info_net(info), info->snd_portid,
71 grp->id, info->nlhdr, GFP_KERNEL);
77 * All writes e.g. Writes to device state (add/remove datapath, port, set
78 * operations on vports, etc.), Writes to other state (flow table
79 * modifications, set miscellaneous datapath parameters, etc.) are protected
82 * Reads are protected by RCU.
84 * There are a few special cases (mostly stats) that have their own
85 * synchronization but they nest under all of above and don't interact with
88 * The RTNL lock nests inside ovs_mutex.
91 static DEFINE_MUTEX(ovs_mutex);
95 mutex_lock(&ovs_mutex);
100 mutex_unlock(&ovs_mutex);
103 #ifdef CONFIG_LOCKDEP
104 int lockdep_ovsl_is_held(void)
107 return lockdep_is_held(&ovs_mutex);
113 static struct vport *new_vport(const struct vport_parms *);
114 static int queue_gso_packets(struct datapath *dp, struct sk_buff *,
115 const struct dp_upcall_info *);
116 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *,
117 const struct dp_upcall_info *);
119 /* Must be called with rcu_read_lock or ovs_mutex. */
120 static struct datapath *get_dp(struct net *net, int dp_ifindex)
122 struct datapath *dp = NULL;
123 struct net_device *dev;
126 dev = dev_get_by_index_rcu(net, dp_ifindex);
128 struct vport *vport = ovs_internal_dev_get_vport(dev);
137 /* Must be called with rcu_read_lock or ovs_mutex. */
138 const char *ovs_dp_name(const struct datapath *dp)
140 struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
141 return vport->ops->get_name(vport);
144 static int get_dpifindex(struct datapath *dp)
151 local = ovs_vport_rcu(dp, OVSP_LOCAL);
153 ifindex = netdev_vport_priv(local)->dev->ifindex;
162 static void destroy_dp_rcu(struct rcu_head *rcu)
164 struct datapath *dp = container_of(rcu, struct datapath, rcu);
166 free_percpu(dp->stats_percpu);
167 release_net(ovs_dp_get_net(dp));
172 static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
175 return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
178 /* Called with ovs_mutex or RCU read lock. */
179 struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
182 struct hlist_head *head;
184 head = vport_hash_bucket(dp, port_no);
185 hlist_for_each_entry_rcu(vport, head, dp_hash_node) {
186 if (vport->port_no == port_no)
192 /* Called with ovs_mutex. */
193 static struct vport *new_vport(const struct vport_parms *parms)
197 vport = ovs_vport_add(parms);
198 if (!IS_ERR(vport)) {
199 struct datapath *dp = parms->dp;
200 struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
202 hlist_add_head_rcu(&vport->dp_hash_node, head);
207 void ovs_dp_detach_port(struct vport *p)
211 /* First drop references to device. */
212 hlist_del_rcu(&p->dp_hash_node);
214 /* Then destroy it. */
218 /* Must be called with rcu_read_lock. */
219 void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb)
221 struct datapath *dp = p->dp;
222 struct sw_flow *flow;
223 struct dp_stats_percpu *stats;
224 struct sw_flow_key key;
229 stats = this_cpu_ptr(dp->stats_percpu);
231 /* Extract flow from 'skb' into 'key'. */
232 error = ovs_flow_extract(skb, p->port_no, &key);
233 if (unlikely(error)) {
239 flow = ovs_flow_tbl_lookup_stats(&dp->table, &key, &n_mask_hit);
240 if (unlikely(!flow)) {
241 struct dp_upcall_info upcall;
243 upcall.cmd = OVS_PACKET_CMD_MISS;
245 upcall.userdata = NULL;
246 upcall.portid = p->upcall_portid;
247 ovs_dp_upcall(dp, skb, &upcall);
249 stats_counter = &stats->n_missed;
253 OVS_CB(skb)->flow = flow;
254 OVS_CB(skb)->pkt_key = &key;
256 ovs_flow_stats_update(OVS_CB(skb)->flow, skb);
257 ovs_execute_actions(dp, skb);
258 stats_counter = &stats->n_hit;
261 /* Update datapath statistics. */
262 u64_stats_update_begin(&stats->sync);
264 stats->n_mask_hit += n_mask_hit;
265 u64_stats_update_end(&stats->sync);
268 static struct genl_family dp_packet_genl_family = {
269 .id = GENL_ID_GENERATE,
270 .hdrsize = sizeof(struct ovs_header),
271 .name = OVS_PACKET_FAMILY,
272 .version = OVS_PACKET_VERSION,
273 .maxattr = OVS_PACKET_ATTR_MAX,
278 int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
279 const struct dp_upcall_info *upcall_info)
281 struct dp_stats_percpu *stats;
284 if (upcall_info->portid == 0) {
289 if (!skb_is_gso(skb))
290 err = queue_userspace_packet(dp, skb, upcall_info);
292 err = queue_gso_packets(dp, skb, upcall_info);
299 stats = this_cpu_ptr(dp->stats_percpu);
301 u64_stats_update_begin(&stats->sync);
303 u64_stats_update_end(&stats->sync);
308 static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
309 const struct dp_upcall_info *upcall_info)
311 unsigned short gso_type = skb_shinfo(skb)->gso_type;
312 struct dp_upcall_info later_info;
313 struct sw_flow_key later_key;
314 struct sk_buff *segs, *nskb;
317 segs = __skb_gso_segment(skb, NETIF_F_SG, false);
319 return PTR_ERR(segs);
321 /* Queue all of the segments. */
324 err = queue_userspace_packet(dp, skb, upcall_info);
328 if (skb == segs && gso_type & SKB_GSO_UDP) {
329 /* The initial flow key extracted by ovs_flow_extract()
330 * in this case is for a first fragment, so we need to
331 * properly mark later fragments.
333 later_key = *upcall_info->key;
334 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
336 later_info = *upcall_info;
337 later_info.key = &later_key;
338 upcall_info = &later_info;
340 } while ((skb = skb->next));
342 /* Free all of the segments. */
350 } while ((skb = nskb));
354 static size_t key_attr_size(void)
356 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
357 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
358 + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
359 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */
360 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */
361 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
362 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
363 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
364 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
365 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
366 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
367 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
368 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
369 + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */
370 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
371 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
372 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
373 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
374 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
377 static size_t upcall_msg_size(const struct nlattr *userdata,
380 size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
381 + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */
382 + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */
384 /* OVS_PACKET_ATTR_USERDATA */
386 size += NLA_ALIGN(userdata->nla_len);
391 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
392 const struct dp_upcall_info *upcall_info)
394 struct ovs_header *upcall;
395 struct sk_buff *nskb = NULL;
396 struct sk_buff *user_skb; /* to be queued to userspace */
398 struct genl_info info = {
399 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)
400 .dst_sk = ovs_dp_get_net(dp)->genl_sock,
402 .snd_portid = upcall_info->portid,
408 dp_ifindex = get_dpifindex(dp);
412 if (vlan_tx_tag_present(skb)) {
413 nskb = skb_clone(skb, GFP_ATOMIC);
417 nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb));
421 vlan_set_tci(nskb, 0);
426 if (nla_attr_size(skb->len) > USHRT_MAX) {
431 /* Complete checksum if needed */
432 if (skb->ip_summed == CHECKSUM_PARTIAL &&
433 (err = skb_checksum_help(skb)))
436 /* Older versions of OVS user space enforce alignment of the last
437 * Netlink attribute to NLA_ALIGNTO which would require extensive
438 * padding logic. Only perform zerocopy if padding is not required.
440 if (dp->user_features & OVS_DP_F_UNALIGNED)
441 hlen = skb_zerocopy_headlen(skb);
445 len = upcall_msg_size(upcall_info->userdata, hlen);
446 user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC);
452 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
453 0, upcall_info->cmd);
454 upcall->dp_ifindex = dp_ifindex;
456 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
457 ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb);
458 nla_nest_end(user_skb, nla);
460 if (upcall_info->userdata)
461 __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
462 nla_len(upcall_info->userdata),
463 nla_data(upcall_info->userdata));
465 /* Only reserve room for attribute header, packet data is added
466 * in skb_zerocopy() */
467 if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) {
471 nla->nla_len = nla_attr_size(skb->len);
473 skb_zerocopy(user_skb, skb, skb->len, hlen);
475 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
476 if (!(dp->user_features & OVS_DP_F_UNALIGNED)) {
477 size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len;
480 memset(skb_put(user_skb, plen), 0, plen);
483 ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len;
485 err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid);
491 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
493 struct ovs_header *ovs_header = info->userhdr;
494 struct nlattr **a = info->attrs;
495 struct sw_flow_actions *acts;
496 struct sk_buff *packet;
497 struct sw_flow *flow;
504 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
505 !a[OVS_PACKET_ATTR_ACTIONS])
508 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
509 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
513 skb_reserve(packet, NET_IP_ALIGN);
515 nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
517 skb_reset_mac_header(packet);
518 eth = eth_hdr(packet);
520 /* Normally, setting the skb 'protocol' field would be handled by a
521 * call to eth_type_trans(), but it assumes there's a sending
522 * device, which we may not have. */
523 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
524 packet->protocol = eth->h_proto;
526 packet->protocol = htons(ETH_P_802_2);
528 /* Build an sw_flow for sending this packet. */
529 flow = ovs_flow_alloc();
534 err = ovs_flow_extract(packet, -1, &flow->key);
538 err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]);
541 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS]));
546 err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS],
547 &flow->key, 0, &acts);
548 rcu_assign_pointer(flow->sf_acts, acts);
552 OVS_CB(packet)->flow = flow;
553 OVS_CB(packet)->pkt_key = &flow->key;
554 packet->priority = flow->key.phy.priority;
555 packet->mark = flow->key.phy.skb_mark;
558 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
564 err = ovs_execute_actions(dp, packet);
568 ovs_flow_free(flow, false);
574 ovs_flow_free(flow, false);
581 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
582 [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
583 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
584 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
587 static struct genl_ops dp_packet_genl_ops[] = {
588 { .cmd = OVS_PACKET_CMD_EXECUTE,
589 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
590 .policy = packet_policy,
591 .doit = ovs_packet_cmd_execute
595 static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats,
596 struct ovs_dp_megaflow_stats *mega_stats)
600 memset(mega_stats, 0, sizeof(*mega_stats));
602 stats->n_flows = ovs_flow_tbl_count(&dp->table);
603 mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table);
605 stats->n_hit = stats->n_missed = stats->n_lost = 0;
607 for_each_possible_cpu(i) {
608 const struct dp_stats_percpu *percpu_stats;
609 struct dp_stats_percpu local_stats;
612 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
615 start = u64_stats_fetch_begin_bh(&percpu_stats->sync);
616 local_stats = *percpu_stats;
617 } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start));
619 stats->n_hit += local_stats.n_hit;
620 stats->n_missed += local_stats.n_missed;
621 stats->n_lost += local_stats.n_lost;
622 mega_stats->n_mask_hit += local_stats.n_mask_hit;
626 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
627 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
628 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
629 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
632 static struct genl_family dp_flow_genl_family = {
633 .id = GENL_ID_GENERATE,
634 .hdrsize = sizeof(struct ovs_header),
635 .name = OVS_FLOW_FAMILY,
636 .version = OVS_FLOW_VERSION,
637 .maxattr = OVS_FLOW_ATTR_MAX,
642 static struct genl_multicast_group ovs_dp_flow_multicast_group = {
643 .name = OVS_FLOW_MCGROUP
646 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)
648 return NLMSG_ALIGN(sizeof(struct ovs_header))
649 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */
650 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */
651 + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
652 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
653 + nla_total_size(8) /* OVS_FLOW_ATTR_USED */
654 + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */
657 /* Called with ovs_mutex or RCU read lock. */
658 static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
659 struct sk_buff *skb, u32 portid,
660 u32 seq, u32 flags, u8 cmd)
662 const int skb_orig_len = skb->len;
663 struct nlattr *start;
664 struct ovs_flow_stats stats;
667 struct ovs_header *ovs_header;
671 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd);
675 ovs_header->dp_ifindex = get_dpifindex(dp);
678 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
680 goto nla_put_failure;
682 err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb);
685 nla_nest_end(skb, nla);
687 nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK);
689 goto nla_put_failure;
691 err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb);
695 nla_nest_end(skb, nla);
697 ovs_flow_stats_get(flow, &stats, &used, &tcp_flags);
699 nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used)))
700 goto nla_put_failure;
702 if (stats.n_packets &&
703 nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats))
704 goto nla_put_failure;
706 if ((u8)ntohs(tcp_flags) &&
707 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags)))
708 goto nla_put_failure;
710 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
711 * this is the first flow to be dumped into 'skb'. This is unusual for
712 * Netlink but individual action lists can be longer than
713 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
714 * The userspace caller can always fetch the actions separately if it
715 * really wants them. (Most userspace callers in fact don't care.)
717 * This can only fail for dump operations because the skb is always
718 * properly sized for single flows.
720 start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS);
722 const struct sw_flow_actions *sf_acts;
724 sf_acts = rcu_dereference_ovsl(flow->sf_acts);
726 err = ovs_nla_put_actions(sf_acts->actions,
727 sf_acts->actions_len, skb);
729 nla_nest_end(skb, start);
734 nla_nest_cancel(skb, start);
736 } else if (skb_orig_len)
737 goto nla_put_failure;
739 return genlmsg_end(skb, ovs_header);
744 genlmsg_cancel(skb, ovs_header);
748 /* Must be called with ovs_mutex. */
749 static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow,
750 struct genl_info *info)
754 len = ovs_flow_cmd_msg_size(ovsl_dereference(flow->sf_acts));
756 return genlmsg_new_unicast(len, info, GFP_KERNEL);
759 /* Must be called with ovs_mutex. */
760 static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow,
762 struct genl_info *info,
768 skb = ovs_flow_cmd_alloc_info(flow, info);
770 return ERR_PTR(-ENOMEM);
772 retval = ovs_flow_cmd_fill_info(flow, dp, skb, info->snd_portid,
773 info->snd_seq, 0, cmd);
778 static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
780 struct nlattr **a = info->attrs;
781 struct ovs_header *ovs_header = info->userhdr;
782 struct sw_flow_key key, masked_key;
783 struct sw_flow *flow = NULL;
784 struct sw_flow_mask mask;
785 struct sk_buff *reply;
787 struct sw_flow_actions *acts = NULL;
788 struct sw_flow_match match;
793 if (!a[OVS_FLOW_ATTR_KEY])
796 ovs_match_init(&match, &key, &mask);
797 error = ovs_nla_get_match(&match,
798 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
802 /* Validate actions. */
803 if (a[OVS_FLOW_ATTR_ACTIONS]) {
804 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
805 error = PTR_ERR(acts);
809 ovs_flow_mask_key(&masked_key, &key, &mask);
810 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS],
811 &masked_key, 0, &acts);
813 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
816 } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) {
817 /* OVS_FLOW_CMD_NEW must have actions. */
823 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
828 /* Check if this is a duplicate flow */
829 flow = ovs_flow_tbl_lookup(&dp->table, &key);
831 /* Bail out if we're not allowed to create a new flow. */
833 if (info->genlhdr->cmd == OVS_FLOW_CMD_SET)
837 flow = ovs_flow_alloc();
839 error = PTR_ERR(flow);
843 flow->key = masked_key;
844 flow->unmasked_key = key;
845 rcu_assign_pointer(flow->sf_acts, acts);
847 /* Put flow in bucket. */
848 error = ovs_flow_tbl_insert(&dp->table, flow, &mask);
854 reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW);
856 /* We found a matching flow. */
857 /* Bail out if we're not allowed to modify an existing flow.
858 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
859 * because Generic Netlink treats the latter as a dump
860 * request. We also accept NLM_F_EXCL in case that bug ever
864 if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW &&
865 info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL))
868 /* The unmasked key has to be the same for flow updates. */
869 if (!ovs_flow_cmp_unmasked_key(flow, &match))
872 /* Update actions, if present. */
874 struct sw_flow_actions *old_acts;
876 old_acts = ovsl_dereference(flow->sf_acts);
877 rcu_assign_pointer(flow->sf_acts, acts);
878 ovs_nla_free_flow_actions(old_acts);
880 reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW);
883 if (a[OVS_FLOW_ATTR_CLEAR])
884 ovs_flow_stats_clear(flow);
889 ovs_notify(reply, info, &ovs_dp_flow_multicast_group);
891 netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
892 ovs_dp_flow_multicast_group.id, PTR_ERR(reply));
896 ovs_flow_free(flow, false);
905 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
907 struct nlattr **a = info->attrs;
908 struct ovs_header *ovs_header = info->userhdr;
909 struct sw_flow_key key;
910 struct sk_buff *reply;
911 struct sw_flow *flow;
913 struct sw_flow_match match;
916 if (!a[OVS_FLOW_ATTR_KEY]) {
917 OVS_NLERR("Flow get message rejected, Key attribute missing.\n");
921 ovs_match_init(&match, &key, NULL);
922 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
927 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
933 flow = ovs_flow_tbl_lookup(&dp->table, &key);
934 if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) {
939 reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW);
941 err = PTR_ERR(reply);
946 return genlmsg_reply(reply, info);
952 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
954 struct nlattr **a = info->attrs;
955 struct ovs_header *ovs_header = info->userhdr;
956 struct sw_flow_key key;
957 struct sk_buff *reply;
958 struct sw_flow *flow;
960 struct sw_flow_match match;
964 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
970 if (!a[OVS_FLOW_ATTR_KEY]) {
971 err = ovs_flow_tbl_flush(&dp->table);
975 ovs_match_init(&match, &key, NULL);
976 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
980 flow = ovs_flow_tbl_lookup(&dp->table, &key);
981 if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) {
986 reply = ovs_flow_cmd_alloc_info(flow, info);
992 ovs_flow_tbl_remove(&dp->table, flow);
994 err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid,
995 info->snd_seq, 0, OVS_FLOW_CMD_DEL);
998 ovs_flow_free(flow, true);
1001 ovs_notify(reply, info, &ovs_dp_flow_multicast_group);
1008 static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1010 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1011 struct table_instance *ti;
1012 struct datapath *dp;
1015 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1021 ti = rcu_dereference(dp->table.ti);
1023 struct sw_flow *flow;
1026 bucket = cb->args[0];
1028 flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj);
1032 if (ovs_flow_cmd_fill_info(flow, dp, skb,
1033 NETLINK_CB(cb->skb).portid,
1034 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1035 OVS_FLOW_CMD_NEW) < 0)
1038 cb->args[0] = bucket;
1045 static struct genl_ops dp_flow_genl_ops[] = {
1046 { .cmd = OVS_FLOW_CMD_NEW,
1047 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1048 .policy = flow_policy,
1049 .doit = ovs_flow_cmd_new_or_set
1051 { .cmd = OVS_FLOW_CMD_DEL,
1052 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1053 .policy = flow_policy,
1054 .doit = ovs_flow_cmd_del
1056 { .cmd = OVS_FLOW_CMD_GET,
1057 .flags = 0, /* OK for unprivileged users. */
1058 .policy = flow_policy,
1059 .doit = ovs_flow_cmd_get,
1060 .dumpit = ovs_flow_cmd_dump
1062 { .cmd = OVS_FLOW_CMD_SET,
1063 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1064 .policy = flow_policy,
1065 .doit = ovs_flow_cmd_new_or_set,
1069 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1070 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1071 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1072 [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
1075 static struct genl_family dp_datapath_genl_family = {
1076 .id = GENL_ID_GENERATE,
1077 .hdrsize = sizeof(struct ovs_header),
1078 .name = OVS_DATAPATH_FAMILY,
1079 .version = OVS_DATAPATH_VERSION,
1080 .maxattr = OVS_DP_ATTR_MAX,
1085 static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
1086 .name = OVS_DATAPATH_MCGROUP
1089 static size_t ovs_dp_cmd_msg_size(void)
1091 size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header));
1093 msgsize += nla_total_size(IFNAMSIZ);
1094 msgsize += nla_total_size(sizeof(struct ovs_dp_stats));
1095 msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats));
1096 msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */
1101 /* Called with ovs_mutex or RCU read lock. */
1102 static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
1103 u32 portid, u32 seq, u32 flags, u8 cmd)
1105 struct ovs_header *ovs_header;
1106 struct ovs_dp_stats dp_stats;
1107 struct ovs_dp_megaflow_stats dp_megaflow_stats;
1110 ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
1115 ovs_header->dp_ifindex = get_dpifindex(dp);
1117 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
1119 goto nla_put_failure;
1121 get_dp_stats(dp, &dp_stats, &dp_megaflow_stats);
1122 if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats),
1124 goto nla_put_failure;
1126 if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS,
1127 sizeof(struct ovs_dp_megaflow_stats),
1128 &dp_megaflow_stats))
1129 goto nla_put_failure;
1131 if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features))
1132 goto nla_put_failure;
1134 return genlmsg_end(skb, ovs_header);
1137 genlmsg_cancel(skb, ovs_header);
1142 /* Must be called with ovs_mutex. */
1143 static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp,
1144 struct genl_info *info, u8 cmd)
1146 struct sk_buff *skb;
1149 skb = genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL);
1151 return ERR_PTR(-ENOMEM);
1153 retval = ovs_dp_cmd_fill_info(dp, skb, info->snd_portid, info->snd_seq, 0, cmd);
1156 return ERR_PTR(retval);
1161 /* Called with rcu_read_lock or ovs_mutex. */
1162 static struct datapath *lookup_datapath(struct net *net,
1163 struct ovs_header *ovs_header,
1164 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1166 struct datapath *dp;
1168 if (!a[OVS_DP_ATTR_NAME])
1169 dp = get_dp(net, ovs_header->dp_ifindex);
1171 struct vport *vport;
1173 vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
1174 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1176 return dp ? dp : ERR_PTR(-ENODEV);
1179 static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info)
1181 struct datapath *dp;
1183 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1187 WARN(dp->user_features, "Dropping previously announced user features\n");
1188 dp->user_features = 0;
1191 static void ovs_dp_change(struct datapath *dp, struct nlattr **a)
1193 if (a[OVS_DP_ATTR_USER_FEATURES])
1194 dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]);
1197 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1199 struct nlattr **a = info->attrs;
1200 struct vport_parms parms;
1201 struct sk_buff *reply;
1202 struct datapath *dp;
1203 struct vport *vport;
1204 struct ovs_net *ovs_net;
1208 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1214 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1216 goto err_unlock_ovs;
1218 ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
1220 /* Allocate table. */
1221 err = ovs_flow_tbl_init(&dp->table);
1225 dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
1226 if (!dp->stats_percpu) {
1228 goto err_destroy_table;
1231 dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
1235 goto err_destroy_percpu;
1238 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
1239 INIT_HLIST_HEAD(&dp->ports[i]);
1241 /* Set up our datapath device. */
1242 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1243 parms.type = OVS_VPORT_TYPE_INTERNAL;
1244 parms.options = NULL;
1246 parms.port_no = OVSP_LOCAL;
1247 parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]);
1249 ovs_dp_change(dp, a);
1251 vport = new_vport(&parms);
1252 if (IS_ERR(vport)) {
1253 err = PTR_ERR(vport);
1257 if (err == -EEXIST) {
1258 /* An outdated user space instance that does not understand
1259 * the concept of user_features has attempted to create a new
1260 * datapath and is likely to reuse it. Drop all user features.
1262 if (info->genlhdr->version < OVS_DP_VER_FEATURES)
1263 ovs_dp_reset_user_features(skb, info);
1266 goto err_destroy_ports_array;
1269 reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW);
1270 err = PTR_ERR(reply);
1272 goto err_destroy_local_port;
1274 ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
1275 list_add_tail_rcu(&dp->list_node, &ovs_net->dps);
1279 ovs_notify(reply, info, &ovs_dp_datapath_multicast_group);
1282 err_destroy_local_port:
1283 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
1284 err_destroy_ports_array:
1287 free_percpu(dp->stats_percpu);
1289 ovs_flow_tbl_destroy(&dp->table, false);
1291 release_net(ovs_dp_get_net(dp));
1299 /* Called with ovs_mutex. */
1300 static void __dp_destroy(struct datapath *dp)
1304 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
1305 struct vport *vport;
1306 struct hlist_node *n;
1308 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node)
1309 if (vport->port_no != OVSP_LOCAL)
1310 ovs_dp_detach_port(vport);
1313 list_del_rcu(&dp->list_node);
1315 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1316 * all ports in datapath are destroyed first before freeing datapath.
1318 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
1320 /* RCU destroy the flow table */
1321 ovs_flow_tbl_destroy(&dp->table, true);
1323 call_rcu(&dp->rcu, destroy_dp_rcu);
1326 static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1328 struct sk_buff *reply;
1329 struct datapath *dp;
1333 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1338 reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_DEL);
1339 err = PTR_ERR(reply);
1346 ovs_notify(reply, info, &ovs_dp_datapath_multicast_group);
1354 static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1356 struct sk_buff *reply;
1357 struct datapath *dp;
1361 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1366 ovs_dp_change(dp, info->attrs);
1368 reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW);
1369 if (IS_ERR(reply)) {
1370 err = PTR_ERR(reply);
1371 netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
1372 ovs_dp_datapath_multicast_group.id, err);
1378 ovs_notify(reply, info, &ovs_dp_datapath_multicast_group);
1386 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1388 struct sk_buff *reply;
1389 struct datapath *dp;
1393 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1399 reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW);
1400 if (IS_ERR(reply)) {
1401 err = PTR_ERR(reply);
1406 return genlmsg_reply(reply, info);
1413 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1415 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
1416 struct datapath *dp;
1417 int skip = cb->args[0];
1421 list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) {
1423 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
1424 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1425 OVS_DP_CMD_NEW) < 0)
1436 static struct genl_ops dp_datapath_genl_ops[] = {
1437 { .cmd = OVS_DP_CMD_NEW,
1438 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1439 .policy = datapath_policy,
1440 .doit = ovs_dp_cmd_new
1442 { .cmd = OVS_DP_CMD_DEL,
1443 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1444 .policy = datapath_policy,
1445 .doit = ovs_dp_cmd_del
1447 { .cmd = OVS_DP_CMD_GET,
1448 .flags = 0, /* OK for unprivileged users. */
1449 .policy = datapath_policy,
1450 .doit = ovs_dp_cmd_get,
1451 .dumpit = ovs_dp_cmd_dump
1453 { .cmd = OVS_DP_CMD_SET,
1454 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1455 .policy = datapath_policy,
1456 .doit = ovs_dp_cmd_set,
1460 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1461 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1462 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1463 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1464 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1465 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1466 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1469 static struct genl_family dp_vport_genl_family = {
1470 .id = GENL_ID_GENERATE,
1471 .hdrsize = sizeof(struct ovs_header),
1472 .name = OVS_VPORT_FAMILY,
1473 .version = OVS_VPORT_VERSION,
1474 .maxattr = OVS_VPORT_ATTR_MAX,
1479 struct genl_multicast_group ovs_dp_vport_multicast_group = {
1480 .name = OVS_VPORT_MCGROUP
1483 /* Called with ovs_mutex or RCU read lock. */
1484 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
1485 u32 portid, u32 seq, u32 flags, u8 cmd)
1487 struct ovs_header *ovs_header;
1488 struct ovs_vport_stats vport_stats;
1491 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
1496 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1498 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
1499 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
1500 nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) ||
1501 nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid))
1502 goto nla_put_failure;
1504 ovs_vport_get_stats(vport, &vport_stats);
1505 if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
1507 goto nla_put_failure;
1509 err = ovs_vport_get_options(vport, skb);
1510 if (err == -EMSGSIZE)
1513 return genlmsg_end(skb, ovs_header);
1518 genlmsg_cancel(skb, ovs_header);
1522 /* Called with ovs_mutex or RCU read lock. */
1523 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid,
1526 struct sk_buff *skb;
1529 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1531 return ERR_PTR(-ENOMEM);
1533 retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd);
1539 /* Called with ovs_mutex or RCU read lock. */
1540 static struct vport *lookup_vport(struct net *net,
1541 struct ovs_header *ovs_header,
1542 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1544 struct datapath *dp;
1545 struct vport *vport;
1547 if (a[OVS_VPORT_ATTR_NAME]) {
1548 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
1550 return ERR_PTR(-ENODEV);
1551 if (ovs_header->dp_ifindex &&
1552 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
1553 return ERR_PTR(-ENODEV);
1555 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1556 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1558 if (port_no >= DP_MAX_PORTS)
1559 return ERR_PTR(-EFBIG);
1561 dp = get_dp(net, ovs_header->dp_ifindex);
1563 return ERR_PTR(-ENODEV);
1565 vport = ovs_vport_ovsl_rcu(dp, port_no);
1567 return ERR_PTR(-ENODEV);
1570 return ERR_PTR(-EINVAL);
1573 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1575 struct nlattr **a = info->attrs;
1576 struct ovs_header *ovs_header = info->userhdr;
1577 struct vport_parms parms;
1578 struct sk_buff *reply;
1579 struct vport *vport;
1580 struct datapath *dp;
1585 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1586 !a[OVS_VPORT_ATTR_UPCALL_PID])
1590 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1595 if (a[OVS_VPORT_ATTR_PORT_NO]) {
1596 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1599 if (port_no >= DP_MAX_PORTS)
1602 vport = ovs_vport_ovsl(dp, port_no);
1607 for (port_no = 1; ; port_no++) {
1608 if (port_no >= DP_MAX_PORTS) {
1612 vport = ovs_vport_ovsl(dp, port_no);
1618 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1619 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1620 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1622 parms.port_no = port_no;
1623 parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1625 vport = new_vport(&parms);
1626 err = PTR_ERR(vport);
1631 if (a[OVS_VPORT_ATTR_STATS])
1632 ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));
1634 reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq,
1636 if (IS_ERR(reply)) {
1637 err = PTR_ERR(reply);
1638 ovs_dp_detach_port(vport);
1642 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
1650 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1652 struct nlattr **a = info->attrs;
1653 struct sk_buff *reply;
1654 struct vport *vport;
1658 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1659 err = PTR_ERR(vport);
1663 if (a[OVS_VPORT_ATTR_TYPE] &&
1664 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
1669 reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1675 if (a[OVS_VPORT_ATTR_OPTIONS]) {
1676 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
1681 if (a[OVS_VPORT_ATTR_STATS])
1682 ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));
1684 if (a[OVS_VPORT_ATTR_UPCALL_PID])
1685 vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1687 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1688 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1692 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
1702 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1704 struct nlattr **a = info->attrs;
1705 struct sk_buff *reply;
1706 struct vport *vport;
1710 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1711 err = PTR_ERR(vport);
1715 if (vport->port_no == OVSP_LOCAL) {
1720 reply = ovs_vport_cmd_build_info(vport, info->snd_portid,
1721 info->snd_seq, OVS_VPORT_CMD_DEL);
1722 err = PTR_ERR(reply);
1727 ovs_dp_detach_port(vport);
1729 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
1736 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1738 struct nlattr **a = info->attrs;
1739 struct ovs_header *ovs_header = info->userhdr;
1740 struct sk_buff *reply;
1741 struct vport *vport;
1745 vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
1746 err = PTR_ERR(vport);
1750 reply = ovs_vport_cmd_build_info(vport, info->snd_portid,
1751 info->snd_seq, OVS_VPORT_CMD_NEW);
1752 err = PTR_ERR(reply);
1758 return genlmsg_reply(reply, info);
1765 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1767 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1768 struct datapath *dp;
1769 int bucket = cb->args[0], skip = cb->args[1];
1773 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1778 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
1779 struct vport *vport;
1782 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
1784 ovs_vport_cmd_fill_info(vport, skb,
1785 NETLINK_CB(cb->skb).portid,
1788 OVS_VPORT_CMD_NEW) < 0)
1804 static struct genl_ops dp_vport_genl_ops[] = {
1805 { .cmd = OVS_VPORT_CMD_NEW,
1806 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1807 .policy = vport_policy,
1808 .doit = ovs_vport_cmd_new
1810 { .cmd = OVS_VPORT_CMD_DEL,
1811 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1812 .policy = vport_policy,
1813 .doit = ovs_vport_cmd_del
1815 { .cmd = OVS_VPORT_CMD_GET,
1816 .flags = 0, /* OK for unprivileged users. */
1817 .policy = vport_policy,
1818 .doit = ovs_vport_cmd_get,
1819 .dumpit = ovs_vport_cmd_dump
1821 { .cmd = OVS_VPORT_CMD_SET,
1822 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1823 .policy = vport_policy,
1824 .doit = ovs_vport_cmd_set,
1828 struct genl_family_and_ops {
1829 struct genl_family *family;
1830 struct genl_ops *ops;
1832 struct genl_multicast_group *group;
1835 static const struct genl_family_and_ops dp_genl_families[] = {
1836 { &dp_datapath_genl_family,
1837 dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops),
1838 &ovs_dp_datapath_multicast_group },
1839 { &dp_vport_genl_family,
1840 dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops),
1841 &ovs_dp_vport_multicast_group },
1842 { &dp_flow_genl_family,
1843 dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops),
1844 &ovs_dp_flow_multicast_group },
1845 { &dp_packet_genl_family,
1846 dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops),
1850 static void dp_unregister_genl(int n_families)
1854 for (i = 0; i < n_families; i++)
1855 genl_unregister_family(dp_genl_families[i].family);
1858 static int dp_register_genl(void)
1865 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
1866 const struct genl_family_and_ops *f = &dp_genl_families[i];
1868 err = genl_register_family_with_ops(f->family, f->ops,
1875 err = genl_register_mc_group(f->family, f->group);
1884 dp_unregister_genl(n_registered);
1888 static int __net_init ovs_init_net(struct net *net)
1890 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
1892 INIT_LIST_HEAD(&ovs_net->dps);
1893 INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
1897 static void __net_exit ovs_exit_net(struct net *net)
1899 struct datapath *dp, *dp_next;
1900 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
1903 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
1907 cancel_work_sync(&ovs_net->dp_notify_work);
1910 static struct pernet_operations ovs_net_ops = {
1911 .init = ovs_init_net,
1912 .exit = ovs_exit_net,
1914 .size = sizeof(struct ovs_net),
1917 DEFINE_COMPAT_PNET_REG_FUNC(device);
1919 static int __init dp_init(void)
1923 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
1925 pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n",
1928 err = ovs_flow_init();
1932 err = ovs_vport_init();
1934 goto error_flow_exit;
1936 err = register_pernet_device(&ovs_net_ops);
1938 goto error_vport_exit;
1940 err = register_netdevice_notifier(&ovs_dp_device_notifier);
1942 goto error_netns_exit;
1944 err = dp_register_genl();
1946 goto error_unreg_notifier;
1950 error_unreg_notifier:
1951 unregister_netdevice_notifier(&ovs_dp_device_notifier);
1953 unregister_pernet_device(&ovs_net_ops);
1962 static void dp_cleanup(void)
1964 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
1965 unregister_netdevice_notifier(&ovs_dp_device_notifier);
1966 unregister_pernet_device(&ovs_net_ops);
1972 module_init(dp_init);
1973 module_exit(dp_cleanup);
1975 MODULE_DESCRIPTION("Open vSwitch switching datapath");
1976 MODULE_LICENSE("GPL");
1977 MODULE_VERSION(VERSION);