2 * Copyright (c) 2007-2014 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 struct genl_family dp_packet_genl_family;
68 static struct genl_family dp_flow_genl_family;
69 static struct genl_family dp_datapath_genl_family;
71 static struct genl_multicast_group ovs_dp_flow_multicast_group = {
72 .name = OVS_FLOW_MCGROUP
75 static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
76 .name = OVS_DATAPATH_MCGROUP
79 struct genl_multicast_group ovs_dp_vport_multicast_group = {
80 .name = OVS_VPORT_MCGROUP
83 /* Check if need to build a reply message.
84 * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */
85 static bool ovs_must_notify(struct genl_info *info,
86 const struct genl_multicast_group *grp)
88 return info->nlhdr->nlmsg_flags & NLM_F_ECHO ||
89 netlink_has_listeners(genl_info_net(info)->genl_sock, GROUP_ID(grp));
92 static void ovs_notify(struct genl_family *family, struct genl_multicast_group *grp,
93 struct sk_buff *skb, struct genl_info *info)
95 genl_notify(family, skb, genl_info_net(info),
96 info->snd_portid, GROUP_ID(grp), info->nlhdr, GFP_KERNEL);
102 * All writes e.g. Writes to device state (add/remove datapath, port, set
103 * operations on vports, etc.), Writes to other state (flow table
104 * modifications, set miscellaneous datapath parameters, etc.) are protected
107 * Reads are protected by RCU.
109 * There are a few special cases (mostly stats) that have their own
110 * synchronization but they nest under all of above and don't interact with
113 * The RTNL lock nests inside ovs_mutex.
116 static DEFINE_MUTEX(ovs_mutex);
120 mutex_lock(&ovs_mutex);
123 void ovs_unlock(void)
125 mutex_unlock(&ovs_mutex);
128 #ifdef CONFIG_LOCKDEP
129 int lockdep_ovsl_is_held(void)
132 return lockdep_is_held(&ovs_mutex);
138 static int queue_gso_packets(struct datapath *dp, struct sk_buff *,
139 const struct dp_upcall_info *);
140 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *,
141 const struct dp_upcall_info *);
143 /* Must be called with rcu_read_lock or ovs_mutex. */
144 static struct datapath *get_dp(struct net *net, int dp_ifindex)
146 struct datapath *dp = NULL;
147 struct net_device *dev;
150 dev = dev_get_by_index_rcu(net, dp_ifindex);
152 struct vport *vport = ovs_internal_dev_get_vport(dev);
161 /* Must be called with rcu_read_lock or ovs_mutex. */
162 const char *ovs_dp_name(const struct datapath *dp)
164 struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
165 return vport->ops->get_name(vport);
168 static int get_dpifindex(struct datapath *dp)
175 local = ovs_vport_rcu(dp, OVSP_LOCAL);
177 ifindex = netdev_vport_priv(local)->dev->ifindex;
186 static void destroy_dp_rcu(struct rcu_head *rcu)
188 struct datapath *dp = container_of(rcu, struct datapath, rcu);
190 ovs_flow_tbl_destroy(&dp->table);
191 free_percpu(dp->stats_percpu);
192 release_net(ovs_dp_get_net(dp));
197 static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
200 return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
203 /* Called with ovs_mutex or RCU read lock. */
204 struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
207 struct hlist_head *head;
209 head = vport_hash_bucket(dp, port_no);
210 hlist_for_each_entry_rcu(vport, head, dp_hash_node) {
211 if (vport->port_no == port_no)
217 /* Called with ovs_mutex. */
218 static struct vport *new_vport(const struct vport_parms *parms)
222 vport = ovs_vport_add(parms);
223 if (!IS_ERR(vport)) {
224 struct datapath *dp = parms->dp;
225 struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
227 hlist_add_head_rcu(&vport->dp_hash_node, head);
232 void ovs_dp_detach_port(struct vport *p)
236 /* First drop references to device. */
237 hlist_del_rcu(&p->dp_hash_node);
239 /* Then destroy it. */
243 void ovs_dp_process_packet_with_key(struct sk_buff *skb,
244 struct sw_flow_key *pkt_key,
247 const struct vport *p = OVS_CB(skb)->input_vport;
248 struct datapath *dp = p->dp;
249 struct sw_flow *flow;
250 struct dp_stats_percpu *stats;
254 stats = this_cpu_ptr(dp->stats_percpu);
257 flow = ovs_flow_tbl_lookup_stats(&dp->table, pkt_key, skb_get_hash(skb),
259 if (unlikely(!flow)) {
260 struct dp_upcall_info upcall;
262 upcall.cmd = OVS_PACKET_CMD_MISS;
263 upcall.key = pkt_key;
264 upcall.userdata = NULL;
265 upcall.portid = ovs_vport_find_upcall_portid(p, skb);
266 ovs_dp_upcall(dp, skb, &upcall);
268 stats_counter = &stats->n_missed;
272 OVS_CB(skb)->pkt_key = pkt_key;
273 OVS_CB(skb)->flow = flow;
275 ovs_flow_stats_update(OVS_CB(skb)->flow, pkt_key->tp.flags, skb);
276 ovs_execute_actions(dp, skb, recirc);
277 stats_counter = &stats->n_hit;
280 /* Update datapath statistics. */
281 u64_stats_update_begin(&stats->sync);
283 stats->n_mask_hit += n_mask_hit;
284 u64_stats_update_end(&stats->sync);
287 /* Must be called with rcu_read_lock. */
288 void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb)
291 struct sw_flow_key key;
293 OVS_CB(skb)->input_vport = p;
295 /* Extract flow from 'skb' into 'key'. */
296 error = ovs_flow_extract(skb, p->port_no, &key);
297 if (unlikely(error)) {
302 ovs_dp_process_packet_with_key(skb, &key, false);
305 int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
306 const struct dp_upcall_info *upcall_info)
308 struct dp_stats_percpu *stats;
311 if (upcall_info->portid == 0) {
316 if (!skb_is_gso(skb))
317 err = queue_userspace_packet(dp, skb, upcall_info);
319 err = queue_gso_packets(dp, skb, upcall_info);
326 stats = this_cpu_ptr(dp->stats_percpu);
328 u64_stats_update_begin(&stats->sync);
330 u64_stats_update_end(&stats->sync);
335 static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
336 const struct dp_upcall_info *upcall_info)
338 unsigned short gso_type = skb_shinfo(skb)->gso_type;
339 struct dp_upcall_info later_info;
340 struct sw_flow_key later_key;
341 struct sk_buff *segs, *nskb;
344 segs = __skb_gso_segment(skb, NETIF_F_SG, false);
346 return PTR_ERR(segs);
348 /* Queue all of the segments. */
351 err = queue_userspace_packet(dp, skb, upcall_info);
355 if (skb == segs && gso_type & SKB_GSO_UDP) {
356 /* The initial flow key extracted by ovs_flow_extract()
357 * in this case is for a first fragment, so we need to
358 * properly mark later fragments.
360 later_key = *upcall_info->key;
361 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
363 later_info = *upcall_info;
364 later_info.key = &later_key;
365 upcall_info = &later_info;
367 } while ((skb = skb->next));
369 /* Free all of the segments. */
377 } while ((skb = nskb));
381 static size_t key_attr_size(void)
383 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
384 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
385 + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
386 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */
387 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */
388 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
389 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
390 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
391 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
392 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
393 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
394 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
395 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
396 + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */
397 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
398 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
399 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
400 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
401 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
404 static size_t upcall_msg_size(const struct nlattr *userdata,
407 size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
408 + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */
409 + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */
411 /* OVS_PACKET_ATTR_USERDATA */
413 size += NLA_ALIGN(userdata->nla_len);
418 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
419 const struct dp_upcall_info *upcall_info)
421 struct ovs_header *upcall;
422 struct sk_buff *nskb = NULL;
423 struct sk_buff *user_skb; /* to be queued to userspace */
425 struct genl_info info = {
426 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)
427 .dst_sk = ovs_dp_get_net(dp)->genl_sock,
429 .snd_portid = upcall_info->portid,
435 dp_ifindex = get_dpifindex(dp);
439 if (vlan_tx_tag_present(skb)) {
440 nskb = skb_clone(skb, GFP_ATOMIC);
444 nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb));
448 vlan_set_tci(nskb, 0);
453 if (nla_attr_size(skb->len) > USHRT_MAX) {
458 /* Complete checksum if needed */
459 if (skb->ip_summed == CHECKSUM_PARTIAL &&
460 (err = skb_checksum_help(skb)))
463 /* Older versions of OVS user space enforce alignment of the last
464 * Netlink attribute to NLA_ALIGNTO which would require extensive
465 * padding logic. Only perform zerocopy if padding is not required.
467 if (dp->user_features & OVS_DP_F_UNALIGNED)
468 hlen = skb_zerocopy_headlen(skb);
472 len = upcall_msg_size(upcall_info->userdata, hlen);
473 user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC);
479 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
480 0, upcall_info->cmd);
481 upcall->dp_ifindex = dp_ifindex;
483 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
484 ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb);
485 nla_nest_end(user_skb, nla);
487 if (upcall_info->userdata)
488 __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
489 nla_len(upcall_info->userdata),
490 nla_data(upcall_info->userdata));
492 /* Only reserve room for attribute header, packet data is added
493 * in skb_zerocopy() */
494 if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) {
498 nla->nla_len = nla_attr_size(skb->len);
500 err = skb_zerocopy(user_skb, skb, skb->len, hlen);
504 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
505 if (!(dp->user_features & OVS_DP_F_UNALIGNED)) {
506 size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len;
509 memset(skb_put(user_skb, plen), 0, plen);
512 ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len;
514 err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid);
522 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
524 struct ovs_header *ovs_header = info->userhdr;
525 struct nlattr **a = info->attrs;
526 struct sw_flow_actions *acts;
527 struct sk_buff *packet;
528 struct sw_flow *flow;
531 struct vport *input_vport;
536 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
537 !a[OVS_PACKET_ATTR_ACTIONS])
540 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
541 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
545 skb_reserve(packet, NET_IP_ALIGN);
547 nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
549 skb_reset_mac_header(packet);
550 eth = eth_hdr(packet);
552 /* Normally, setting the skb 'protocol' field would be handled by a
553 * call to eth_type_trans(), but it assumes there's a sending
554 * device, which we may not have. */
555 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
556 packet->protocol = eth->h_proto;
558 packet->protocol = htons(ETH_P_802_2);
560 /* Build an sw_flow for sending this packet. */
561 flow = ovs_flow_alloc();
566 err = ovs_flow_extract(packet, -1, &flow->key);
570 err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]);
573 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS]));
578 err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS],
579 &flow->key, 0, &acts);
580 rcu_assign_pointer(flow->sf_acts, acts);
584 OVS_CB(packet)->flow = flow;
585 OVS_CB(packet)->pkt_key = &flow->key;
586 packet->priority = flow->key.phy.priority;
587 packet->mark = flow->key.phy.skb_mark;
590 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
595 input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port);
597 input_vport = ovs_vport_rcu(dp, OVSP_LOCAL);
602 OVS_CB(packet)->input_vport = input_vport;
605 err = ovs_execute_actions(dp, packet, false);
609 ovs_flow_free(flow, false);
615 ovs_flow_free(flow, false);
622 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
623 [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
624 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
625 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
628 static struct genl_ops dp_packet_genl_ops[] = {
629 { .cmd = OVS_PACKET_CMD_EXECUTE,
630 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
631 .policy = packet_policy,
632 .doit = ovs_packet_cmd_execute
636 static struct genl_family dp_packet_genl_family = {
637 .id = GENL_ID_GENERATE,
638 .hdrsize = sizeof(struct ovs_header),
639 .name = OVS_PACKET_FAMILY,
640 .version = OVS_PACKET_VERSION,
641 .maxattr = OVS_PACKET_ATTR_MAX,
643 .parallel_ops = true,
644 .ops = dp_packet_genl_ops,
645 .n_ops = ARRAY_SIZE(dp_packet_genl_ops),
648 static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats,
649 struct ovs_dp_megaflow_stats *mega_stats)
653 memset(mega_stats, 0, sizeof(*mega_stats));
655 stats->n_flows = ovs_flow_tbl_count(&dp->table);
656 mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table);
658 stats->n_hit = stats->n_missed = stats->n_lost = 0;
660 for_each_possible_cpu(i) {
661 const struct dp_stats_percpu *percpu_stats;
662 struct dp_stats_percpu local_stats;
665 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
668 start = u64_stats_fetch_begin_bh(&percpu_stats->sync);
669 local_stats = *percpu_stats;
670 } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start));
672 stats->n_hit += local_stats.n_hit;
673 stats->n_missed += local_stats.n_missed;
674 stats->n_lost += local_stats.n_lost;
675 mega_stats->n_mask_hit += local_stats.n_mask_hit;
679 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)
681 return NLMSG_ALIGN(sizeof(struct ovs_header))
682 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */
683 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */
684 + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
685 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
686 + nla_total_size(8) /* OVS_FLOW_ATTR_USED */
687 + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */
690 /* Called with ovs_mutex or RCU read lock. */
691 static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex,
692 struct sk_buff *skb, u32 portid,
693 u32 seq, u32 flags, u8 cmd)
695 const int skb_orig_len = skb->len;
696 struct nlattr *start;
697 struct ovs_flow_stats stats;
700 struct ovs_header *ovs_header;
704 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd);
708 ovs_header->dp_ifindex = dp_ifindex;
711 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
713 goto nla_put_failure;
715 err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb);
718 nla_nest_end(skb, nla);
720 nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK);
722 goto nla_put_failure;
724 err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb);
728 nla_nest_end(skb, nla);
730 ovs_flow_stats_get(flow, &stats, &used, &tcp_flags);
733 nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used)))
734 goto nla_put_failure;
736 if (stats.n_packets &&
737 nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats))
738 goto nla_put_failure;
740 if ((u8)ntohs(tcp_flags) &&
741 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags)))
742 goto nla_put_failure;
744 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
745 * this is the first flow to be dumped into 'skb'. This is unusual for
746 * Netlink but individual action lists can be longer than
747 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
748 * The userspace caller can always fetch the actions separately if it
749 * really wants them. (Most userspace callers in fact don't care.)
751 * This can only fail for dump operations because the skb is always
752 * properly sized for single flows.
754 start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS);
756 const struct sw_flow_actions *sf_acts;
758 sf_acts = rcu_dereference_ovsl(flow->sf_acts);
759 err = ovs_nla_put_actions(sf_acts->actions,
760 sf_acts->actions_len, skb);
763 nla_nest_end(skb, start);
768 nla_nest_cancel(skb, start);
770 } else if (skb_orig_len)
771 goto nla_put_failure;
773 return genlmsg_end(skb, ovs_header);
778 genlmsg_cancel(skb, ovs_header);
782 /* May not be called with RCU read lock. */
783 static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts,
784 struct genl_info *info,
789 if (!always && !ovs_must_notify(info, &ovs_dp_flow_multicast_group))
792 skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL);
795 return ERR_PTR(-ENOMEM);
800 /* Called with ovs_mutex. */
801 static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow,
803 struct genl_info *info, u8 cmd,
809 skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info,
811 if (!skb || IS_ERR(skb))
814 retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb,
815 info->snd_portid, info->snd_seq, 0,
821 static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info)
823 struct nlattr **a = info->attrs;
824 struct ovs_header *ovs_header = info->userhdr;
825 struct sw_flow *flow, *new_flow;
826 struct sw_flow_mask mask;
827 struct sk_buff *reply;
829 struct sw_flow_actions *acts;
830 struct sw_flow_match match;
833 /* Must have key and actions. */
835 if (!a[OVS_FLOW_ATTR_KEY])
837 if (!a[OVS_FLOW_ATTR_ACTIONS])
840 /* Most of the time we need to allocate a new flow, do it before
842 new_flow = ovs_flow_alloc();
843 if (IS_ERR(new_flow)) {
844 error = PTR_ERR(new_flow);
849 ovs_match_init(&match, &new_flow->unmasked_key, &mask);
850 error = ovs_nla_get_match(&match,
851 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
855 ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask);
857 /* Validate actions. */
858 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
859 error = PTR_ERR(acts);
863 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key,
866 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
870 reply = ovs_flow_cmd_alloc_info(acts, info, false);
872 error = PTR_ERR(reply);
877 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
882 /* Check if this is a duplicate flow */
883 flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key);
885 rcu_assign_pointer(new_flow->sf_acts, acts);
887 /* Put flow in bucket. */
888 error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask);
889 if (unlikely(error)) {
894 if (unlikely(reply)) {
895 error = ovs_flow_cmd_fill_info(new_flow,
896 ovs_header->dp_ifindex,
897 reply, info->snd_portid,
904 struct sw_flow_actions *old_acts;
906 /* Bail out if we're not allowed to modify an existing flow.
907 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
908 * because Generic Netlink treats the latter as a dump
909 * request. We also accept NLM_F_EXCL in case that bug ever
912 if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE
917 /* The unmasked key has to be the same for flow updates. */
918 if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) {
922 /* Update actions. */
923 old_acts = ovsl_dereference(flow->sf_acts);
924 rcu_assign_pointer(flow->sf_acts, acts);
926 if (unlikely(reply)) {
927 error = ovs_flow_cmd_fill_info(flow,
928 ovs_header->dp_ifindex,
929 reply, info->snd_portid,
936 ovs_nla_free_flow_actions(old_acts);
937 ovs_flow_free(new_flow, false);
941 ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info);
950 ovs_flow_free(new_flow, false);
955 static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info)
957 struct nlattr **a = info->attrs;
958 struct ovs_header *ovs_header = info->userhdr;
959 struct sw_flow_key key, masked_key;
960 struct sw_flow *flow;
961 struct sw_flow_mask mask;
962 struct sk_buff *reply = NULL;
964 struct sw_flow_actions *old_acts = NULL, *acts = NULL;
965 struct sw_flow_match match;
970 if (!a[OVS_FLOW_ATTR_KEY])
973 ovs_match_init(&match, &key, &mask);
974 error = ovs_nla_get_match(&match,
975 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
979 /* Validate actions. */
980 if (a[OVS_FLOW_ATTR_ACTIONS]) {
981 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
982 error = PTR_ERR(acts);
986 ovs_flow_mask_key(&masked_key, &key, &mask);
987 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS],
988 &masked_key, 0, &acts);
990 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
995 /* Can allocate before locking if have acts. */
997 reply = ovs_flow_cmd_alloc_info(acts, info, false);
999 error = PTR_ERR(reply);
1000 goto err_kfree_acts;
1005 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1006 if (unlikely(!dp)) {
1008 goto err_unlock_ovs;
1010 /* Check that the flow exists. */
1011 flow = ovs_flow_tbl_lookup(&dp->table, &key);
1012 if (unlikely(!flow)) {
1014 goto err_unlock_ovs;
1016 /* The unmasked key has to be the same for flow updates. */
1017 if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) {
1019 goto err_unlock_ovs;
1021 /* Update actions, if present. */
1023 old_acts = ovsl_dereference(flow->sf_acts);
1024 rcu_assign_pointer(flow->sf_acts, acts);
1026 if (unlikely(reply)) {
1027 error = ovs_flow_cmd_fill_info(flow,
1028 ovs_header->dp_ifindex,
1029 reply, info->snd_portid,
1035 /* Could not alloc without acts before locking. */
1036 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex,
1037 info, OVS_FLOW_CMD_NEW, false);
1038 if (unlikely(IS_ERR(reply))) {
1039 error = PTR_ERR(reply);
1040 goto err_unlock_ovs;
1045 if (a[OVS_FLOW_ATTR_CLEAR])
1046 ovs_flow_stats_clear(flow);
1050 ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info);
1052 ovs_nla_free_flow_actions(old_acts);
1064 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
1066 struct nlattr **a = info->attrs;
1067 struct ovs_header *ovs_header = info->userhdr;
1068 struct sw_flow_key key;
1069 struct sk_buff *reply;
1070 struct sw_flow *flow;
1071 struct datapath *dp;
1072 struct sw_flow_match match;
1075 if (!a[OVS_FLOW_ATTR_KEY]) {
1076 OVS_NLERR("Flow get message rejected, Key attribute missing.\n");
1080 ovs_match_init(&match, &key, NULL);
1081 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
1086 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1092 flow = ovs_flow_tbl_lookup(&dp->table, &key);
1093 if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) {
1098 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info,
1099 OVS_FLOW_CMD_NEW, true);
1100 if (IS_ERR(reply)) {
1101 err = PTR_ERR(reply);
1106 return genlmsg_reply(reply, info);
1112 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
1114 struct nlattr **a = info->attrs;
1115 struct ovs_header *ovs_header = info->userhdr;
1116 struct sw_flow_key key;
1117 struct sk_buff *reply;
1118 struct sw_flow *flow;
1119 struct datapath *dp;
1120 struct sw_flow_match match;
1123 if (likely(a[OVS_FLOW_ATTR_KEY])) {
1124 ovs_match_init(&match, &key, NULL);
1125 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
1131 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1132 if (unlikely(!dp)) {
1136 if (unlikely(!a[OVS_FLOW_ATTR_KEY])) {
1137 err = ovs_flow_tbl_flush(&dp->table);
1140 flow = ovs_flow_tbl_lookup(&dp->table, &key);
1141 if (unlikely(!flow || !ovs_flow_cmp_unmasked_key(flow, &match))) {
1146 ovs_flow_tbl_remove(&dp->table, flow);
1149 reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *)flow->sf_acts,
1152 if (likely(reply)) {
1153 if (likely(!IS_ERR(reply))) {
1154 rcu_read_lock(); /* Keep RCU checker happy. */
1155 err = ovs_flow_cmd_fill_info(flow,
1156 ovs_header->dp_ifindex,
1157 reply, info->snd_portid,
1162 ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info);
1164 genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0,
1165 GROUP_ID(&ovs_dp_flow_multicast_group), PTR_ERR(reply));
1170 ovs_flow_free(flow, true);
1177 static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1179 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1180 struct table_instance *ti;
1181 struct datapath *dp;
1184 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1190 ti = rcu_dereference(dp->table.ti);
1192 struct sw_flow *flow;
1195 bucket = cb->args[0];
1197 flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj);
1201 if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb,
1202 NETLINK_CB(cb->skb).portid,
1203 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1204 OVS_FLOW_CMD_NEW) < 0)
1207 cb->args[0] = bucket;
1214 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
1215 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
1216 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
1217 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
1220 static struct genl_ops dp_flow_genl_ops[] = {
1221 { .cmd = OVS_FLOW_CMD_NEW,
1222 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1223 .policy = flow_policy,
1224 .doit = ovs_flow_cmd_new
1226 { .cmd = OVS_FLOW_CMD_DEL,
1227 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1228 .policy = flow_policy,
1229 .doit = ovs_flow_cmd_del
1231 { .cmd = OVS_FLOW_CMD_GET,
1232 .flags = 0, /* OK for unprivileged users. */
1233 .policy = flow_policy,
1234 .doit = ovs_flow_cmd_get,
1235 .dumpit = ovs_flow_cmd_dump
1237 { .cmd = OVS_FLOW_CMD_SET,
1238 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1239 .policy = flow_policy,
1240 .doit = ovs_flow_cmd_set,
1244 static struct genl_family dp_flow_genl_family = {
1245 .id = GENL_ID_GENERATE,
1246 .hdrsize = sizeof(struct ovs_header),
1247 .name = OVS_FLOW_FAMILY,
1248 .version = OVS_FLOW_VERSION,
1249 .maxattr = OVS_FLOW_ATTR_MAX,
1251 .parallel_ops = true,
1252 .ops = dp_flow_genl_ops,
1253 .n_ops = ARRAY_SIZE(dp_flow_genl_ops),
1254 .mcgrps = &ovs_dp_flow_multicast_group,
1258 static size_t ovs_dp_cmd_msg_size(void)
1260 size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header));
1262 msgsize += nla_total_size(IFNAMSIZ);
1263 msgsize += nla_total_size(sizeof(struct ovs_dp_stats));
1264 msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats));
1265 msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */
1270 /* Called with ovs_mutex or RCU read lock. */
1271 static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
1272 u32 portid, u32 seq, u32 flags, u8 cmd)
1274 struct ovs_header *ovs_header;
1275 struct ovs_dp_stats dp_stats;
1276 struct ovs_dp_megaflow_stats dp_megaflow_stats;
1279 ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
1284 ovs_header->dp_ifindex = get_dpifindex(dp);
1286 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
1288 goto nla_put_failure;
1290 get_dp_stats(dp, &dp_stats, &dp_megaflow_stats);
1291 if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats),
1293 goto nla_put_failure;
1295 if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS,
1296 sizeof(struct ovs_dp_megaflow_stats),
1297 &dp_megaflow_stats))
1298 goto nla_put_failure;
1300 if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features))
1301 goto nla_put_failure;
1303 return genlmsg_end(skb, ovs_header);
1306 genlmsg_cancel(skb, ovs_header);
1311 static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info)
1313 return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL);
1316 /* Called with rcu_read_lock or ovs_mutex. */
1317 static struct datapath *lookup_datapath(struct net *net,
1318 struct ovs_header *ovs_header,
1319 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1321 struct datapath *dp;
1323 if (!a[OVS_DP_ATTR_NAME])
1324 dp = get_dp(net, ovs_header->dp_ifindex);
1326 struct vport *vport;
1328 vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
1329 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1331 return dp ? dp : ERR_PTR(-ENODEV);
1334 static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info)
1336 struct datapath *dp;
1338 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1342 WARN(dp->user_features, "Dropping previously announced user features\n");
1343 dp->user_features = 0;
1346 static void ovs_dp_change(struct datapath *dp, struct nlattr **a)
1348 if (a[OVS_DP_ATTR_USER_FEATURES])
1349 dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]);
1352 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1354 struct nlattr **a = info->attrs;
1355 struct vport_parms parms;
1356 struct sk_buff *reply;
1357 struct datapath *dp;
1358 struct vport *vport;
1359 struct ovs_net *ovs_net;
1363 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1366 reply = ovs_dp_cmd_alloc_info(info);
1371 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1373 goto err_free_reply;
1375 ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
1377 /* Allocate table. */
1378 err = ovs_flow_tbl_init(&dp->table);
1382 dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
1383 if (!dp->stats_percpu) {
1385 goto err_destroy_table;
1388 for_each_possible_cpu(i) {
1389 struct dp_stats_percpu *dpath_stats;
1390 dpath_stats = per_cpu_ptr(dp->stats_percpu, i);
1391 u64_stats_init(&dpath_stats->sync);
1394 dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
1398 goto err_destroy_percpu;
1401 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
1402 INIT_HLIST_HEAD(&dp->ports[i]);
1404 /* Set up our datapath device. */
1405 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1406 parms.type = OVS_VPORT_TYPE_INTERNAL;
1407 parms.options = NULL;
1409 parms.port_no = OVSP_LOCAL;
1410 parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID];
1412 ovs_dp_change(dp, a);
1414 /* So far only local changes have been made, now need the lock. */
1417 vport = new_vport(&parms);
1418 if (IS_ERR(vport)) {
1419 err = PTR_ERR(vport);
1423 if (err == -EEXIST) {
1424 /* An outdated user space instance that does not understand
1425 * the concept of user_features has attempted to create a new
1426 * datapath and is likely to reuse it. Drop all user features.
1428 if (info->genlhdr->version < OVS_DP_VER_FEATURES)
1429 ovs_dp_reset_user_features(skb, info);
1432 goto err_destroy_ports_array;
1435 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1436 info->snd_seq, 0, OVS_DP_CMD_NEW);
1439 ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
1440 list_add_tail_rcu(&dp->list_node, &ovs_net->dps);
1444 ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info);
1447 err_destroy_ports_array:
1451 free_percpu(dp->stats_percpu);
1453 ovs_flow_tbl_destroy(&dp->table);
1455 release_net(ovs_dp_get_net(dp));
1463 /* Called with ovs_mutex. */
1464 static void __dp_destroy(struct datapath *dp)
1468 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
1469 struct vport *vport;
1470 struct hlist_node *n;
1472 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node)
1473 if (vport->port_no != OVSP_LOCAL)
1474 ovs_dp_detach_port(vport);
1477 list_del_rcu(&dp->list_node);
1479 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1480 * all ports in datapath are destroyed first before freeing datapath.
1482 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
1484 /* RCU destroy the flow table */
1485 call_rcu(&dp->rcu, destroy_dp_rcu);
1488 static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1490 struct sk_buff *reply;
1491 struct datapath *dp;
1494 reply = ovs_dp_cmd_alloc_info(info);
1499 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1502 goto err_unlock_free;
1504 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1505 info->snd_seq, 0, OVS_DP_CMD_DEL);
1511 ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info);
1520 static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1522 struct sk_buff *reply;
1523 struct datapath *dp;
1526 reply = ovs_dp_cmd_alloc_info(info);
1531 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1534 goto err_unlock_free;
1536 ovs_dp_change(dp, info->attrs);
1538 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1539 info->snd_seq, 0, OVS_DP_CMD_NEW);
1543 ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info);
1552 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1554 struct sk_buff *reply;
1555 struct datapath *dp;
1558 reply = ovs_dp_cmd_alloc_info(info);
1563 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1566 goto err_unlock_free;
1568 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1569 info->snd_seq, 0, OVS_DP_CMD_NEW);
1573 return genlmsg_reply(reply, info);
1581 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1583 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
1584 struct datapath *dp;
1585 int skip = cb->args[0];
1589 list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) {
1591 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
1592 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1593 OVS_DP_CMD_NEW) < 0)
1604 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1605 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1606 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1607 [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
1610 static struct genl_ops dp_datapath_genl_ops[] = {
1611 { .cmd = OVS_DP_CMD_NEW,
1612 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1613 .policy = datapath_policy,
1614 .doit = ovs_dp_cmd_new
1616 { .cmd = OVS_DP_CMD_DEL,
1617 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1618 .policy = datapath_policy,
1619 .doit = ovs_dp_cmd_del
1621 { .cmd = OVS_DP_CMD_GET,
1622 .flags = 0, /* OK for unprivileged users. */
1623 .policy = datapath_policy,
1624 .doit = ovs_dp_cmd_get,
1625 .dumpit = ovs_dp_cmd_dump
1627 { .cmd = OVS_DP_CMD_SET,
1628 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1629 .policy = datapath_policy,
1630 .doit = ovs_dp_cmd_set,
1634 static struct genl_family dp_datapath_genl_family = {
1635 .id = GENL_ID_GENERATE,
1636 .hdrsize = sizeof(struct ovs_header),
1637 .name = OVS_DATAPATH_FAMILY,
1638 .version = OVS_DATAPATH_VERSION,
1639 .maxattr = OVS_DP_ATTR_MAX,
1641 .parallel_ops = true,
1642 .ops = dp_datapath_genl_ops,
1643 .n_ops = ARRAY_SIZE(dp_datapath_genl_ops),
1644 .mcgrps = &ovs_dp_datapath_multicast_group,
1648 /* Called with ovs_mutex or RCU read lock. */
1649 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
1650 u32 portid, u32 seq, u32 flags, u8 cmd)
1652 struct ovs_header *ovs_header;
1653 struct ovs_vport_stats vport_stats;
1656 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
1661 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1663 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
1664 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
1665 nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)))
1666 goto nla_put_failure;
1668 ovs_vport_get_stats(vport, &vport_stats);
1669 if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
1671 goto nla_put_failure;
1673 if (ovs_vport_get_upcall_portids(vport, skb))
1674 goto nla_put_failure;
1676 err = ovs_vport_get_options(vport, skb);
1677 if (err == -EMSGSIZE)
1680 return genlmsg_end(skb, ovs_header);
1685 genlmsg_cancel(skb, ovs_header);
1689 static struct sk_buff *ovs_vport_cmd_alloc_info(void)
1691 return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1694 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1695 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid,
1698 struct sk_buff *skb;
1701 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1703 return ERR_PTR(-ENOMEM);
1705 retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd);
1711 /* Called with ovs_mutex or RCU read lock. */
1712 static struct vport *lookup_vport(struct net *net,
1713 struct ovs_header *ovs_header,
1714 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1716 struct datapath *dp;
1717 struct vport *vport;
1719 if (a[OVS_VPORT_ATTR_NAME]) {
1720 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
1722 return ERR_PTR(-ENODEV);
1723 if (ovs_header->dp_ifindex &&
1724 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
1725 return ERR_PTR(-ENODEV);
1727 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1728 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1730 if (port_no >= DP_MAX_PORTS)
1731 return ERR_PTR(-EFBIG);
1733 dp = get_dp(net, ovs_header->dp_ifindex);
1735 return ERR_PTR(-ENODEV);
1737 vport = ovs_vport_ovsl_rcu(dp, port_no);
1739 return ERR_PTR(-ENODEV);
1742 return ERR_PTR(-EINVAL);
1745 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1747 struct nlattr **a = info->attrs;
1748 struct ovs_header *ovs_header = info->userhdr;
1749 struct vport_parms parms;
1750 struct sk_buff *reply;
1751 struct vport *vport;
1752 struct datapath *dp;
1756 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1757 !a[OVS_VPORT_ATTR_UPCALL_PID])
1760 port_no = a[OVS_VPORT_ATTR_PORT_NO]
1761 ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0;
1762 if (port_no >= DP_MAX_PORTS)
1765 reply = ovs_vport_cmd_alloc_info();
1770 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1773 goto exit_unlock_free;
1776 vport = ovs_vport_ovsl(dp, port_no);
1779 goto exit_unlock_free;
1781 for (port_no = 1; ; port_no++) {
1782 if (port_no >= DP_MAX_PORTS) {
1784 goto exit_unlock_free;
1786 vport = ovs_vport_ovsl(dp, port_no);
1792 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1793 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1794 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1796 parms.port_no = port_no;
1797 parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID];
1799 vport = new_vport(&parms);
1800 err = PTR_ERR(vport);
1802 goto exit_unlock_free;
1805 if (a[OVS_VPORT_ATTR_STATS])
1806 ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));
1808 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1809 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1813 ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info);
1822 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1824 struct nlattr **a = info->attrs;
1825 struct sk_buff *reply;
1826 struct vport *vport;
1829 reply = ovs_vport_cmd_alloc_info();
1834 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1835 err = PTR_ERR(vport);
1837 goto exit_unlock_free;
1839 if (a[OVS_VPORT_ATTR_TYPE] &&
1840 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
1842 goto exit_unlock_free;
1845 if (a[OVS_VPORT_ATTR_OPTIONS]) {
1846 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
1848 goto exit_unlock_free;
1851 if (a[OVS_VPORT_ATTR_STATS])
1852 ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));
1855 if (a[OVS_VPORT_ATTR_UPCALL_PID]) {
1856 err = ovs_vport_set_upcall_portids(vport,
1857 a[OVS_VPORT_ATTR_UPCALL_PID]);
1859 goto exit_unlock_free;
1862 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1863 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1867 ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info);
1876 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1878 struct nlattr **a = info->attrs;
1879 struct sk_buff *reply;
1880 struct vport *vport;
1883 reply = ovs_vport_cmd_alloc_info();
1888 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1889 err = PTR_ERR(vport);
1891 goto exit_unlock_free;
1893 if (vport->port_no == OVSP_LOCAL) {
1895 goto exit_unlock_free;
1898 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1899 info->snd_seq, 0, OVS_VPORT_CMD_DEL);
1901 ovs_dp_detach_port(vport);
1904 ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info);
1913 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1915 struct nlattr **a = info->attrs;
1916 struct ovs_header *ovs_header = info->userhdr;
1917 struct sk_buff *reply;
1918 struct vport *vport;
1921 reply = ovs_vport_cmd_alloc_info();
1926 vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
1927 err = PTR_ERR(vport);
1929 goto exit_unlock_free;
1930 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1931 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1935 return genlmsg_reply(reply, info);
1943 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1945 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1946 struct datapath *dp;
1947 int bucket = cb->args[0], skip = cb->args[1];
1951 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1956 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
1957 struct vport *vport;
1960 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
1962 ovs_vport_cmd_fill_info(vport, skb,
1963 NETLINK_CB(cb->skb).portid,
1966 OVS_VPORT_CMD_NEW) < 0)
1982 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1983 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1984 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1985 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1986 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1987 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1988 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1991 static struct genl_ops dp_vport_genl_ops[] = {
1992 { .cmd = OVS_VPORT_CMD_NEW,
1993 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1994 .policy = vport_policy,
1995 .doit = ovs_vport_cmd_new
1997 { .cmd = OVS_VPORT_CMD_DEL,
1998 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1999 .policy = vport_policy,
2000 .doit = ovs_vport_cmd_del
2002 { .cmd = OVS_VPORT_CMD_GET,
2003 .flags = 0, /* OK for unprivileged users. */
2004 .policy = vport_policy,
2005 .doit = ovs_vport_cmd_get,
2006 .dumpit = ovs_vport_cmd_dump
2008 { .cmd = OVS_VPORT_CMD_SET,
2009 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
2010 .policy = vport_policy,
2011 .doit = ovs_vport_cmd_set,
2015 struct genl_family dp_vport_genl_family = {
2016 .id = GENL_ID_GENERATE,
2017 .hdrsize = sizeof(struct ovs_header),
2018 .name = OVS_VPORT_FAMILY,
2019 .version = OVS_VPORT_VERSION,
2020 .maxattr = OVS_VPORT_ATTR_MAX,
2022 .parallel_ops = true,
2023 .ops = dp_vport_genl_ops,
2024 .n_ops = ARRAY_SIZE(dp_vport_genl_ops),
2025 .mcgrps = &ovs_dp_vport_multicast_group,
2029 static struct genl_family *dp_genl_families[] = {
2030 &dp_datapath_genl_family,
2031 &dp_vport_genl_family,
2032 &dp_flow_genl_family,
2033 &dp_packet_genl_family,
2036 static void dp_unregister_genl(int n_families)
2040 for (i = 0; i < n_families; i++)
2041 genl_unregister_family(dp_genl_families[i]);
2044 static int dp_register_genl(void)
2049 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
2051 err = genl_register_family(dp_genl_families[i]);
2059 dp_unregister_genl(i);
2063 static int __net_init ovs_init_net(struct net *net)
2065 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2067 INIT_LIST_HEAD(&ovs_net->dps);
2068 INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
2072 static void __net_exit ovs_exit_net(struct net *net)
2074 struct datapath *dp, *dp_next;
2075 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2078 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
2082 cancel_work_sync(&ovs_net->dp_notify_work);
2085 static struct pernet_operations ovs_net_ops = {
2086 .init = ovs_init_net,
2087 .exit = ovs_exit_net,
2089 .size = sizeof(struct ovs_net),
2092 DEFINE_COMPAT_PNET_REG_FUNC(device);
2094 static int __init dp_init(void)
2098 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
2100 pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n",
2103 err = ovs_flow_init();
2107 err = ovs_vport_init();
2109 goto error_flow_exit;
2111 err = register_pernet_device(&ovs_net_ops);
2113 goto error_vport_exit;
2115 err = register_netdevice_notifier(&ovs_dp_device_notifier);
2117 goto error_netns_exit;
2119 err = dp_register_genl();
2121 goto error_unreg_notifier;
2125 error_unreg_notifier:
2126 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2128 unregister_pernet_device(&ovs_net_ops);
2137 static void dp_cleanup(void)
2139 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
2140 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2141 unregister_pernet_device(&ovs_net_ops);
2147 module_init(dp_init);
2148 module_exit(dp_cleanup);
2150 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2151 MODULE_LICENSE("GPL");
2152 MODULE_VERSION(VERSION);