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_netlink.h"
61 #include "vport-internal_dev.h"
62 #include "vport-netdev.h"
64 int ovs_net_id __read_mostly;
66 static void ovs_notify(struct sk_buff *skb, struct genl_info *info,
67 struct genl_multicast_group *grp)
69 genl_notify(skb, genl_info_net(info), info->snd_portid,
70 grp->id, info->nlhdr, GFP_KERNEL);
76 * All writes e.g. Writes to device state (add/remove datapath, port, set
77 * operations on vports, etc.), Writes to other state (flow table
78 * modifications, set miscellaneous datapath parameters, etc.) are protected
81 * Reads are protected by RCU.
83 * There are a few special cases (mostly stats) that have their own
84 * synchronization but they nest under all of above and don't interact with
87 * The RTNL lock nests inside ovs_mutex.
90 static DEFINE_MUTEX(ovs_mutex);
94 mutex_lock(&ovs_mutex);
99 mutex_unlock(&ovs_mutex);
102 #ifdef CONFIG_LOCKDEP
103 int lockdep_ovsl_is_held(void)
106 return lockdep_is_held(&ovs_mutex);
112 static struct vport *new_vport(const struct vport_parms *);
113 static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *,
114 const struct dp_upcall_info *);
115 static int queue_userspace_packet(struct net *, int dp_ifindex,
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 ovs_flow_tbl_destroy(&dp->table);
167 free_percpu(dp->stats_percpu);
168 release_net(ovs_dp_get_net(dp));
173 static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
176 return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
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;
228 stats = this_cpu_ptr(dp->stats_percpu);
230 /* Extract flow from 'skb' into 'key'. */
231 error = ovs_flow_extract(skb, p->port_no, &key);
232 if (unlikely(error)) {
238 flow = ovs_flow_tbl_lookup(&dp->table, &key);
239 if (unlikely(!flow)) {
240 struct dp_upcall_info upcall;
242 upcall.cmd = OVS_PACKET_CMD_MISS;
244 upcall.userdata = NULL;
245 upcall.portid = p->upcall_portid;
246 ovs_dp_upcall(dp, skb, &upcall);
248 stats_counter = &stats->n_missed;
252 OVS_CB(skb)->flow = flow;
253 OVS_CB(skb)->pkt_key = &key;
255 stats_counter = &stats->n_hit;
256 ovs_flow_used(OVS_CB(skb)->flow, skb);
257 ovs_execute_actions(dp, skb);
260 /* Update datapath statistics. */
261 u64_stats_update_begin(&stats->sync);
263 u64_stats_update_end(&stats->sync);
266 static struct genl_family dp_packet_genl_family = {
267 .id = GENL_ID_GENERATE,
268 .hdrsize = sizeof(struct ovs_header),
269 .name = OVS_PACKET_FAMILY,
270 .version = OVS_PACKET_VERSION,
271 .maxattr = OVS_PACKET_ATTR_MAX,
276 int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
277 const struct dp_upcall_info *upcall_info)
279 struct dp_stats_percpu *stats;
283 if (upcall_info->portid == 0) {
288 dp_ifindex = get_dpifindex(dp);
294 if (!skb_is_gso(skb))
295 err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info);
297 err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info);
304 stats = this_cpu_ptr(dp->stats_percpu);
306 u64_stats_update_begin(&stats->sync);
308 u64_stats_update_end(&stats->sync);
313 static int queue_gso_packets(struct net *net, int dp_ifindex,
315 const struct dp_upcall_info *upcall_info)
317 unsigned short gso_type = skb_shinfo(skb)->gso_type;
318 struct dp_upcall_info later_info;
319 struct sw_flow_key later_key;
320 struct sk_buff *segs, *nskb;
323 segs = __skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM, false);
325 return PTR_ERR(segs);
327 /* Queue all of the segments. */
330 err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info);
334 if (skb == segs && gso_type & SKB_GSO_UDP) {
335 /* The initial flow key extracted by ovs_flow_extract()
336 * in this case is for a first fragment, so we need to
337 * properly mark later fragments.
339 later_key = *upcall_info->key;
340 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
342 later_info = *upcall_info;
343 later_info.key = &later_key;
344 upcall_info = &later_info;
346 } while ((skb = skb->next));
348 /* Free all of the segments. */
356 } while ((skb = nskb));
360 static size_t key_attr_size(void)
362 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
363 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
364 + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
365 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */
366 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */
367 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
368 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
369 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
370 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
371 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
372 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
373 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
374 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
375 + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */
376 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
377 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
378 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
379 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
380 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
383 static size_t upcall_msg_size(const struct sk_buff *skb,
384 const struct nlattr *userdata)
386 size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
387 + nla_total_size(skb->len) /* OVS_PACKET_ATTR_PACKET */
388 + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */
390 /* OVS_PACKET_ATTR_USERDATA */
392 size += NLA_ALIGN(userdata->nla_len);
397 static int queue_userspace_packet(struct net *net, int dp_ifindex,
399 const struct dp_upcall_info *upcall_info)
401 struct ovs_header *upcall;
402 struct sk_buff *nskb = NULL;
403 struct sk_buff *user_skb; /* to be queued to userspace */
407 if (vlan_tx_tag_present(skb)) {
408 nskb = skb_clone(skb, GFP_ATOMIC);
412 nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb));
416 vlan_set_tci(nskb, 0);
421 if (nla_attr_size(skb->len) > USHRT_MAX) {
426 user_skb = genlmsg_new(upcall_msg_size(skb, upcall_info->userdata), GFP_ATOMIC);
432 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
433 0, upcall_info->cmd);
434 upcall->dp_ifindex = dp_ifindex;
436 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
437 ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb);
438 nla_nest_end(user_skb, nla);
440 if (upcall_info->userdata)
441 __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
442 nla_len(upcall_info->userdata),
443 nla_data(upcall_info->userdata));
445 nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len);
447 skb_copy_and_csum_dev(skb, nla_data(nla));
449 genlmsg_end(user_skb, upcall);
450 err = genlmsg_unicast(net, user_skb, upcall_info->portid);
457 static void clear_stats(struct sw_flow *flow)
461 flow->packet_count = 0;
462 flow->byte_count = 0;
465 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
467 struct ovs_header *ovs_header = info->userhdr;
468 struct nlattr **a = info->attrs;
469 struct sw_flow_actions *acts;
470 struct sk_buff *packet;
471 struct sw_flow *flow;
478 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
479 !a[OVS_PACKET_ATTR_ACTIONS])
482 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
483 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
487 skb_reserve(packet, NET_IP_ALIGN);
489 nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
491 skb_reset_mac_header(packet);
492 eth = eth_hdr(packet);
494 /* Normally, setting the skb 'protocol' field would be handled by a
495 * call to eth_type_trans(), but it assumes there's a sending
496 * device, which we may not have. */
497 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
498 packet->protocol = eth->h_proto;
500 packet->protocol = htons(ETH_P_802_2);
502 /* Build an sw_flow for sending this packet. */
503 flow = ovs_flow_alloc();
508 err = ovs_flow_extract(packet, -1, &flow->key);
512 err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]);
515 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS]));
520 err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS],
521 &flow->key, 0, &acts);
522 rcu_assign_pointer(flow->sf_acts, acts);
526 OVS_CB(packet)->flow = flow;
527 OVS_CB(packet)->pkt_key = &flow->key;
528 packet->priority = flow->key.phy.priority;
529 packet->mark = flow->key.phy.skb_mark;
532 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
538 err = ovs_execute_actions(dp, packet);
542 ovs_flow_free(flow, false);
548 ovs_flow_free(flow, false);
555 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
556 [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
557 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
558 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
561 static struct genl_ops dp_packet_genl_ops[] = {
562 { .cmd = OVS_PACKET_CMD_EXECUTE,
563 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
564 .policy = packet_policy,
565 .doit = ovs_packet_cmd_execute
569 static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats)
573 stats->n_flows = ovs_flow_tbl_count(&dp->table);
575 stats->n_hit = stats->n_missed = stats->n_lost = 0;
576 for_each_possible_cpu(i) {
577 const struct dp_stats_percpu *percpu_stats;
578 struct dp_stats_percpu local_stats;
581 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
584 start = u64_stats_fetch_begin_bh(&percpu_stats->sync);
585 local_stats = *percpu_stats;
586 } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start));
588 stats->n_hit += local_stats.n_hit;
589 stats->n_missed += local_stats.n_missed;
590 stats->n_lost += local_stats.n_lost;
594 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
595 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
596 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
597 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
600 static struct genl_family dp_flow_genl_family = {
601 .id = GENL_ID_GENERATE,
602 .hdrsize = sizeof(struct ovs_header),
603 .name = OVS_FLOW_FAMILY,
604 .version = OVS_FLOW_VERSION,
605 .maxattr = OVS_FLOW_ATTR_MAX,
610 static struct genl_multicast_group ovs_dp_flow_multicast_group = {
611 .name = OVS_FLOW_MCGROUP
614 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)
616 return NLMSG_ALIGN(sizeof(struct ovs_header))
617 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */
618 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */
619 + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
620 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
621 + nla_total_size(8) /* OVS_FLOW_ATTR_USED */
622 + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */
625 /* Called with ovs_mutex. */
626 static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
627 struct sk_buff *skb, u32 portid,
628 u32 seq, u32 flags, u8 cmd)
630 const int skb_orig_len = skb->len;
631 struct nlattr *start;
632 struct ovs_flow_stats stats;
633 struct ovs_header *ovs_header;
639 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd);
643 ovs_header->dp_ifindex = get_dpifindex(dp);
646 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
648 goto nla_put_failure;
650 err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb);
653 nla_nest_end(skb, nla);
655 nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK);
657 goto nla_put_failure;
659 err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb);
663 nla_nest_end(skb, nla);
665 spin_lock_bh(&flow->lock);
667 stats.n_packets = flow->packet_count;
668 stats.n_bytes = flow->byte_count;
669 tcp_flags = flow->tcp_flags;
670 spin_unlock_bh(&flow->lock);
673 nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used)))
674 goto nla_put_failure;
676 if (stats.n_packets &&
677 nla_put(skb, OVS_FLOW_ATTR_STATS,
678 sizeof(struct ovs_flow_stats), &stats))
679 goto nla_put_failure;
682 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags))
683 goto nla_put_failure;
685 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
686 * this is the first flow to be dumped into 'skb'. This is unusual for
687 * Netlink but individual action lists can be longer than
688 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
689 * The userspace caller can always fetch the actions separately if it
690 * really wants them. (Most userspace callers in fact don't care.)
692 * This can only fail for dump operations because the skb is always
693 * properly sized for single flows.
695 start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS);
697 const struct sw_flow_actions *sf_acts;
699 sf_acts = rcu_dereference_check(flow->sf_acts,
700 lockdep_ovsl_is_held());
702 err = ovs_nla_put_actions(sf_acts->actions,
703 sf_acts->actions_len, skb);
705 nla_nest_end(skb, start);
710 nla_nest_cancel(skb, start);
712 } else if (skb_orig_len)
713 goto nla_put_failure;
715 return genlmsg_end(skb, ovs_header);
720 genlmsg_cancel(skb, ovs_header);
724 static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow)
726 const struct sw_flow_actions *sf_acts;
728 sf_acts = ovsl_dereference(flow->sf_acts);
730 return genlmsg_new(ovs_flow_cmd_msg_size(sf_acts), GFP_KERNEL);
733 static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow,
735 u32 portid, u32 seq, u8 cmd)
740 skb = ovs_flow_cmd_alloc_info(flow);
742 return ERR_PTR(-ENOMEM);
744 retval = ovs_flow_cmd_fill_info(flow, dp, skb, portid, seq, 0, cmd);
749 static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
751 struct nlattr **a = info->attrs;
752 struct ovs_header *ovs_header = info->userhdr;
753 struct sw_flow_key key, masked_key;
754 struct sw_flow *flow = NULL;
755 struct sw_flow_mask mask;
756 struct sk_buff *reply;
758 struct sw_flow_actions *acts = NULL;
759 struct sw_flow_match match;
764 if (!a[OVS_FLOW_ATTR_KEY])
767 ovs_match_init(&match, &key, &mask);
768 error = ovs_nla_get_match(&match,
769 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
773 /* Validate actions. */
774 if (a[OVS_FLOW_ATTR_ACTIONS]) {
775 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
776 error = PTR_ERR(acts);
780 ovs_flow_mask_key(&masked_key, &key, &mask);
781 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS],
782 &masked_key, 0, &acts);
784 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
787 } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) {
793 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
798 /* Check if this is a duplicate flow */
799 flow = ovs_flow_tbl_lookup(&dp->table, &key);
801 /* Bail out if we're not allowed to create a new flow. */
803 if (info->genlhdr->cmd == OVS_FLOW_CMD_SET)
807 flow = ovs_flow_alloc();
809 error = PTR_ERR(flow);
814 flow->key = masked_key;
815 flow->unmasked_key = key;
816 rcu_assign_pointer(flow->sf_acts, acts);
818 /* Put flow in bucket. */
819 error = ovs_flow_tbl_insert(&dp->table, flow, &mask);
825 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
826 info->snd_seq, OVS_FLOW_CMD_NEW);
828 /* We found a matching flow. */
829 struct sw_flow_actions *old_acts;
831 /* Bail out if we're not allowed to modify an existing flow.
832 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
833 * because Generic Netlink treats the latter as a dump
834 * request. We also accept NLM_F_EXCL in case that bug ever
838 if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW &&
839 info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL))
842 /* The unmasked key has to be the same for flow updates. */
844 if (!ovs_flow_cmp_unmasked_key(flow, &match)) {
845 OVS_NLERR("Flow modification message rejected, unmasked key does not match.\n");
849 /* Update actions. */
850 old_acts = ovsl_dereference(flow->sf_acts);
851 rcu_assign_pointer(flow->sf_acts, acts);
852 ovs_nla_free_flow_actions(old_acts);
854 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
855 info->snd_seq, OVS_FLOW_CMD_NEW);
858 if (a[OVS_FLOW_ATTR_CLEAR]) {
859 spin_lock_bh(&flow->lock);
861 spin_unlock_bh(&flow->lock);
867 ovs_notify(reply, info, &ovs_dp_flow_multicast_group);
869 netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
870 ovs_dp_flow_multicast_group.id, PTR_ERR(reply));
874 ovs_flow_free(flow, false);
883 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
885 struct nlattr **a = info->attrs;
886 struct ovs_header *ovs_header = info->userhdr;
887 struct sw_flow_key key;
888 struct sk_buff *reply;
889 struct sw_flow *flow;
891 struct sw_flow_match match;
894 if (!a[OVS_FLOW_ATTR_KEY]) {
895 OVS_NLERR("Flow get message rejected, Key attribute missing.\n");
899 ovs_match_init(&match, &key, NULL);
900 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
905 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
911 flow = ovs_flow_tbl_lookup(&dp->table, &key);
912 if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) {
917 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
918 info->snd_seq, OVS_FLOW_CMD_NEW);
920 err = PTR_ERR(reply);
925 return genlmsg_reply(reply, info);
931 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
933 struct nlattr **a = info->attrs;
934 struct ovs_header *ovs_header = info->userhdr;
935 struct sw_flow_key key;
936 struct sk_buff *reply;
937 struct sw_flow *flow;
939 struct sw_flow_match match;
943 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
949 if (!a[OVS_FLOW_ATTR_KEY]) {
950 err = ovs_flow_tbl_flush(&dp->table);
954 ovs_match_init(&match, &key, NULL);
955 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
959 flow = ovs_flow_tbl_lookup(&dp->table, &key);
960 if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) {
965 reply = ovs_flow_cmd_alloc_info(flow);
971 ovs_flow_tbl_remove(&dp->table, flow);
973 err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid,
974 info->snd_seq, 0, OVS_FLOW_CMD_DEL);
977 ovs_flow_free(flow, true);
980 ovs_notify(reply, info, &ovs_dp_flow_multicast_group);
987 static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
989 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
990 struct table_instance *ti;
994 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1000 ti = rcu_dereference(dp->table.ti);
1002 struct sw_flow *flow;
1005 bucket = cb->args[0];
1007 flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj);
1011 if (ovs_flow_cmd_fill_info(flow, dp, skb,
1012 NETLINK_CB(cb->skb).portid,
1013 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1014 OVS_FLOW_CMD_NEW) < 0)
1017 cb->args[0] = bucket;
1024 static struct genl_ops dp_flow_genl_ops[] = {
1025 { .cmd = OVS_FLOW_CMD_NEW,
1026 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1027 .policy = flow_policy,
1028 .doit = ovs_flow_cmd_new_or_set
1030 { .cmd = OVS_FLOW_CMD_DEL,
1031 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1032 .policy = flow_policy,
1033 .doit = ovs_flow_cmd_del
1035 { .cmd = OVS_FLOW_CMD_GET,
1036 .flags = 0, /* OK for unprivileged users. */
1037 .policy = flow_policy,
1038 .doit = ovs_flow_cmd_get,
1039 .dumpit = ovs_flow_cmd_dump
1041 { .cmd = OVS_FLOW_CMD_SET,
1042 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1043 .policy = flow_policy,
1044 .doit = ovs_flow_cmd_new_or_set,
1048 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1049 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1050 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1053 static struct genl_family dp_datapath_genl_family = {
1054 .id = GENL_ID_GENERATE,
1055 .hdrsize = sizeof(struct ovs_header),
1056 .name = OVS_DATAPATH_FAMILY,
1057 .version = OVS_DATAPATH_VERSION,
1058 .maxattr = OVS_DP_ATTR_MAX,
1063 static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
1064 .name = OVS_DATAPATH_MCGROUP
1067 static size_t ovs_dp_cmd_msg_size(void)
1069 size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header));
1071 msgsize += nla_total_size(IFNAMSIZ);
1072 msgsize += nla_total_size(sizeof(struct ovs_dp_stats));
1077 static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
1078 u32 portid, u32 seq, u32 flags, u8 cmd)
1080 struct ovs_header *ovs_header;
1081 struct ovs_dp_stats dp_stats;
1084 ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
1089 ovs_header->dp_ifindex = get_dpifindex(dp);
1092 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
1095 goto nla_put_failure;
1097 get_dp_stats(dp, &dp_stats);
1098 if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats))
1099 goto nla_put_failure;
1101 return genlmsg_end(skb, ovs_header);
1104 genlmsg_cancel(skb, ovs_header);
1109 static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 portid,
1112 struct sk_buff *skb;
1115 skb = genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL);
1117 return ERR_PTR(-ENOMEM);
1119 retval = ovs_dp_cmd_fill_info(dp, skb, portid, seq, 0, cmd);
1122 return ERR_PTR(retval);
1127 /* Called with ovs_mutex. */
1128 static struct datapath *lookup_datapath(struct net *net,
1129 struct ovs_header *ovs_header,
1130 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1132 struct datapath *dp;
1134 if (!a[OVS_DP_ATTR_NAME])
1135 dp = get_dp(net, ovs_header->dp_ifindex);
1137 struct vport *vport;
1140 vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
1141 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1144 return dp ? dp : ERR_PTR(-ENODEV);
1147 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1149 struct nlattr **a = info->attrs;
1150 struct vport_parms parms;
1151 struct sk_buff *reply;
1152 struct datapath *dp;
1153 struct vport *vport;
1154 struct ovs_net *ovs_net;
1158 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1164 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1166 goto err_unlock_ovs;
1168 ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
1170 /* Allocate table. */
1171 err = ovs_flow_tbl_init(&dp->table);
1175 dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
1176 if (!dp->stats_percpu) {
1178 goto err_destroy_table;
1181 dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
1185 goto err_destroy_percpu;
1188 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
1189 INIT_HLIST_HEAD(&dp->ports[i]);
1191 /* Set up our datapath device. */
1192 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1193 parms.type = OVS_VPORT_TYPE_INTERNAL;
1194 parms.options = NULL;
1196 parms.port_no = OVSP_LOCAL;
1197 parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]);
1199 vport = new_vport(&parms);
1200 if (IS_ERR(vport)) {
1201 err = PTR_ERR(vport);
1205 goto err_destroy_ports_array;
1208 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
1209 info->snd_seq, OVS_DP_CMD_NEW);
1210 err = PTR_ERR(reply);
1212 goto err_destroy_local_port;
1214 ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
1215 list_add_tail_rcu(&dp->list_node, &ovs_net->dps);
1219 ovs_notify(reply, info, &ovs_dp_datapath_multicast_group);
1222 err_destroy_local_port:
1223 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
1224 err_destroy_ports_array:
1227 free_percpu(dp->stats_percpu);
1229 ovs_flow_tbl_destroy(&dp->table);
1231 release_net(ovs_dp_get_net(dp));
1239 /* Called with ovs_mutex. */
1240 static void __dp_destroy(struct datapath *dp)
1244 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
1245 struct vport *vport;
1246 struct hlist_node *n;
1248 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node)
1249 if (vport->port_no != OVSP_LOCAL)
1250 ovs_dp_detach_port(vport);
1253 list_del_rcu(&dp->list_node);
1255 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1256 * all port in datapath are destroyed first before freeing datapath.
1258 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
1260 call_rcu(&dp->rcu, destroy_dp_rcu);
1263 static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1265 struct sk_buff *reply;
1266 struct datapath *dp;
1270 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1275 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
1276 info->snd_seq, OVS_DP_CMD_DEL);
1277 err = PTR_ERR(reply);
1284 ovs_notify(reply, info, &ovs_dp_datapath_multicast_group);
1292 static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1294 struct sk_buff *reply;
1295 struct datapath *dp;
1299 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1304 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
1305 info->snd_seq, OVS_DP_CMD_NEW);
1306 if (IS_ERR(reply)) {
1307 err = PTR_ERR(reply);
1308 netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
1309 ovs_dp_datapath_multicast_group.id, err);
1315 ovs_notify(reply, info, &ovs_dp_datapath_multicast_group);
1323 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1325 struct sk_buff *reply;
1326 struct datapath *dp;
1330 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1336 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
1337 info->snd_seq, OVS_DP_CMD_NEW);
1338 if (IS_ERR(reply)) {
1339 err = PTR_ERR(reply);
1344 return genlmsg_reply(reply, info);
1351 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1353 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
1354 struct datapath *dp;
1355 int skip = cb->args[0];
1359 list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) {
1361 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
1362 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1363 OVS_DP_CMD_NEW) < 0)
1374 static struct genl_ops dp_datapath_genl_ops[] = {
1375 { .cmd = OVS_DP_CMD_NEW,
1376 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1377 .policy = datapath_policy,
1378 .doit = ovs_dp_cmd_new
1380 { .cmd = OVS_DP_CMD_DEL,
1381 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1382 .policy = datapath_policy,
1383 .doit = ovs_dp_cmd_del
1385 { .cmd = OVS_DP_CMD_GET,
1386 .flags = 0, /* OK for unprivileged users. */
1387 .policy = datapath_policy,
1388 .doit = ovs_dp_cmd_get,
1389 .dumpit = ovs_dp_cmd_dump
1391 { .cmd = OVS_DP_CMD_SET,
1392 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1393 .policy = datapath_policy,
1394 .doit = ovs_dp_cmd_set,
1398 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1399 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1400 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1401 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1402 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1403 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1404 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1407 static struct genl_family dp_vport_genl_family = {
1408 .id = GENL_ID_GENERATE,
1409 .hdrsize = sizeof(struct ovs_header),
1410 .name = OVS_VPORT_FAMILY,
1411 .version = OVS_VPORT_VERSION,
1412 .maxattr = OVS_VPORT_ATTR_MAX,
1417 struct genl_multicast_group ovs_dp_vport_multicast_group = {
1418 .name = OVS_VPORT_MCGROUP
1421 /* Called with ovs_mutex or RCU read lock. */
1422 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
1423 u32 portid, u32 seq, u32 flags, u8 cmd)
1425 struct ovs_header *ovs_header;
1426 struct ovs_vport_stats vport_stats;
1429 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
1434 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1436 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
1437 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
1438 nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) ||
1439 nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid))
1440 goto nla_put_failure;
1442 ovs_vport_get_stats(vport, &vport_stats);
1443 if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
1445 goto nla_put_failure;
1447 err = ovs_vport_get_options(vport, skb);
1448 if (err == -EMSGSIZE)
1451 return genlmsg_end(skb, ovs_header);
1456 genlmsg_cancel(skb, ovs_header);
1460 /* Called with ovs_mutex or RCU read lock. */
1461 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid,
1464 struct sk_buff *skb;
1467 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1469 return ERR_PTR(-ENOMEM);
1471 retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd);
1477 /* Called with ovs_mutex or RCU read lock. */
1478 static struct vport *lookup_vport(struct net *net,
1479 struct ovs_header *ovs_header,
1480 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1482 struct datapath *dp;
1483 struct vport *vport;
1485 if (a[OVS_VPORT_ATTR_NAME]) {
1486 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
1488 return ERR_PTR(-ENODEV);
1489 if (ovs_header->dp_ifindex &&
1490 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
1491 return ERR_PTR(-ENODEV);
1493 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1494 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1496 if (port_no >= DP_MAX_PORTS)
1497 return ERR_PTR(-EFBIG);
1499 dp = get_dp(net, ovs_header->dp_ifindex);
1501 return ERR_PTR(-ENODEV);
1503 vport = ovs_vport_ovsl_rcu(dp, port_no);
1505 return ERR_PTR(-ENODEV);
1508 return ERR_PTR(-EINVAL);
1511 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1513 struct nlattr **a = info->attrs;
1514 struct ovs_header *ovs_header = info->userhdr;
1515 struct vport_parms parms;
1516 struct sk_buff *reply;
1517 struct vport *vport;
1518 struct datapath *dp;
1523 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1524 !a[OVS_VPORT_ATTR_UPCALL_PID])
1528 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1533 if (a[OVS_VPORT_ATTR_PORT_NO]) {
1534 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1537 if (port_no >= DP_MAX_PORTS)
1540 vport = ovs_vport_ovsl(dp, port_no);
1545 for (port_no = 1; ; port_no++) {
1546 if (port_no >= DP_MAX_PORTS) {
1550 vport = ovs_vport_ovsl(dp, port_no);
1556 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1557 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1558 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1560 parms.port_no = port_no;
1561 parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1563 vport = new_vport(&parms);
1564 err = PTR_ERR(vport);
1569 if (a[OVS_VPORT_ATTR_STATS])
1570 ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));
1572 reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq,
1574 if (IS_ERR(reply)) {
1575 err = PTR_ERR(reply);
1576 ovs_dp_detach_port(vport);
1580 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
1588 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1590 struct nlattr **a = info->attrs;
1591 struct sk_buff *reply;
1592 struct vport *vport;
1596 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1597 err = PTR_ERR(vport);
1601 if (a[OVS_VPORT_ATTR_TYPE] &&
1602 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
1607 reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1613 if (a[OVS_VPORT_ATTR_OPTIONS]) {
1614 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
1619 if (a[OVS_VPORT_ATTR_STATS])
1620 ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));
1622 if (a[OVS_VPORT_ATTR_UPCALL_PID])
1623 vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1625 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1626 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1630 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
1640 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1642 struct nlattr **a = info->attrs;
1643 struct sk_buff *reply;
1644 struct vport *vport;
1648 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1649 err = PTR_ERR(vport);
1653 if (vport->port_no == OVSP_LOCAL) {
1658 reply = ovs_vport_cmd_build_info(vport, info->snd_portid,
1659 info->snd_seq, OVS_VPORT_CMD_DEL);
1660 err = PTR_ERR(reply);
1665 ovs_dp_detach_port(vport);
1667 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
1674 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1676 struct nlattr **a = info->attrs;
1677 struct ovs_header *ovs_header = info->userhdr;
1678 struct sk_buff *reply;
1679 struct vport *vport;
1683 vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
1684 err = PTR_ERR(vport);
1688 reply = ovs_vport_cmd_build_info(vport, info->snd_portid,
1689 info->snd_seq, OVS_VPORT_CMD_NEW);
1690 err = PTR_ERR(reply);
1696 return genlmsg_reply(reply, info);
1703 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1705 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1706 struct datapath *dp;
1707 int bucket = cb->args[0], skip = cb->args[1];
1710 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1715 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
1716 struct vport *vport;
1719 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
1721 ovs_vport_cmd_fill_info(vport, skb,
1722 NETLINK_CB(cb->skb).portid,
1725 OVS_VPORT_CMD_NEW) < 0)
1741 static struct genl_ops dp_vport_genl_ops[] = {
1742 { .cmd = OVS_VPORT_CMD_NEW,
1743 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1744 .policy = vport_policy,
1745 .doit = ovs_vport_cmd_new
1747 { .cmd = OVS_VPORT_CMD_DEL,
1748 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1749 .policy = vport_policy,
1750 .doit = ovs_vport_cmd_del
1752 { .cmd = OVS_VPORT_CMD_GET,
1753 .flags = 0, /* OK for unprivileged users. */
1754 .policy = vport_policy,
1755 .doit = ovs_vport_cmd_get,
1756 .dumpit = ovs_vport_cmd_dump
1758 { .cmd = OVS_VPORT_CMD_SET,
1759 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1760 .policy = vport_policy,
1761 .doit = ovs_vport_cmd_set,
1765 struct genl_family_and_ops {
1766 struct genl_family *family;
1767 struct genl_ops *ops;
1769 struct genl_multicast_group *group;
1772 static const struct genl_family_and_ops dp_genl_families[] = {
1773 { &dp_datapath_genl_family,
1774 dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops),
1775 &ovs_dp_datapath_multicast_group },
1776 { &dp_vport_genl_family,
1777 dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops),
1778 &ovs_dp_vport_multicast_group },
1779 { &dp_flow_genl_family,
1780 dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops),
1781 &ovs_dp_flow_multicast_group },
1782 { &dp_packet_genl_family,
1783 dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops),
1787 static void dp_unregister_genl(int n_families)
1791 for (i = 0; i < n_families; i++)
1792 genl_unregister_family(dp_genl_families[i].family);
1795 static int dp_register_genl(void)
1802 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
1803 const struct genl_family_and_ops *f = &dp_genl_families[i];
1805 err = genl_register_family_with_ops(f->family, f->ops,
1812 err = genl_register_mc_group(f->family, f->group);
1821 dp_unregister_genl(n_registered);
1825 static int __net_init ovs_init_net(struct net *net)
1827 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
1829 INIT_LIST_HEAD(&ovs_net->dps);
1830 INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
1834 static void __net_exit ovs_exit_net(struct net *net)
1836 struct datapath *dp, *dp_next;
1837 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
1840 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
1844 cancel_work_sync(&ovs_net->dp_notify_work);
1847 static struct pernet_operations ovs_net_ops = {
1848 .init = ovs_init_net,
1849 .exit = ovs_exit_net,
1851 .size = sizeof(struct ovs_net),
1854 DEFINE_COMPAT_PNET_REG_FUNC(device);
1856 static int __init dp_init(void)
1860 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
1862 pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n",
1865 err = ovs_flow_init();
1869 err = ovs_vport_init();
1871 goto error_flow_exit;
1873 err = register_pernet_device(&ovs_net_ops);
1875 goto error_vport_exit;
1877 err = register_netdevice_notifier(&ovs_dp_device_notifier);
1879 goto error_netns_exit;
1881 err = dp_register_genl();
1883 goto error_unreg_notifier;
1887 error_unreg_notifier:
1888 unregister_netdevice_notifier(&ovs_dp_device_notifier);
1890 unregister_pernet_device(&ovs_net_ops);
1899 static void dp_cleanup(void)
1901 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
1902 unregister_netdevice_notifier(&ovs_dp_device_notifier);
1903 unregister_pernet_device(&ovs_net_ops);
1909 module_init(dp_init);
1910 module_exit(dp_cleanup);
1912 MODULE_DESCRIPTION("Open vSwitch switching datapath");
1913 MODULE_LICENSE("GPL");
1914 MODULE_VERSION(VERSION);