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/ethtool.h>
40 #include <linux/wait.h>
41 #include <asm/div64.h>
42 #include <linux/highmem.h>
43 #include <linux/netfilter_bridge.h>
44 #include <linux/netfilter_ipv4.h>
45 #include <linux/inetdevice.h>
46 #include <linux/list.h>
47 #include <linux/openvswitch.h>
48 #include <linux/rculist.h>
49 #include <linux/dmi.h>
50 #include <net/genetlink.h>
51 #include <net/net_namespace.h>
52 #include <net/netns/generic.h>
56 #include "flow_table.h"
57 #include "flow_netlink.h"
58 #include "vport-internal_dev.h"
59 #include "vport-netdev.h"
61 int ovs_net_id __read_mostly;
63 static struct genl_family dp_packet_genl_family;
64 static struct genl_family dp_flow_genl_family;
65 static struct genl_family dp_datapath_genl_family;
67 static const struct genl_multicast_group ovs_dp_flow_multicast_group = {
68 .name = OVS_FLOW_MCGROUP,
71 static const struct genl_multicast_group ovs_dp_datapath_multicast_group = {
72 .name = OVS_DATAPATH_MCGROUP,
75 static const struct genl_multicast_group ovs_dp_vport_multicast_group = {
76 .name = OVS_VPORT_MCGROUP,
79 /* Check if need to build a reply message.
80 * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */
81 static bool ovs_must_notify(struct genl_info *info,
82 const struct genl_multicast_group *grp)
84 return info->nlhdr->nlmsg_flags & NLM_F_ECHO ||
85 netlink_has_listeners(genl_info_net(info)->genl_sock, 0);
88 static void ovs_notify(struct genl_family *family,
89 struct sk_buff *skb, struct genl_info *info)
91 genl_notify(family, skb, genl_info_net(info), info->snd_portid,
92 0, info->nlhdr, GFP_KERNEL);
98 * All writes e.g. Writes to device state (add/remove datapath, port, set
99 * operations on vports, etc.), Writes to other state (flow table
100 * modifications, set miscellaneous datapath parameters, etc.) are protected
103 * Reads are protected by RCU.
105 * There are a few special cases (mostly stats) that have their own
106 * synchronization but they nest under all of above and don't interact with
109 * The RTNL lock nests inside ovs_mutex.
112 static DEFINE_MUTEX(ovs_mutex);
116 mutex_lock(&ovs_mutex);
119 void ovs_unlock(void)
121 mutex_unlock(&ovs_mutex);
124 #ifdef CONFIG_LOCKDEP
125 int lockdep_ovsl_is_held(void)
128 return lockdep_is_held(&ovs_mutex);
134 static struct vport *new_vport(const struct vport_parms *);
135 static int queue_gso_packets(struct datapath *dp, struct sk_buff *,
136 const struct dp_upcall_info *);
137 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *,
138 const struct dp_upcall_info *);
140 /* Must be called with rcu_read_lock or ovs_mutex. */
141 static struct datapath *get_dp(struct net *net, int dp_ifindex)
143 struct datapath *dp = NULL;
144 struct net_device *dev;
147 dev = dev_get_by_index_rcu(net, dp_ifindex);
149 struct vport *vport = ovs_internal_dev_get_vport(dev);
158 /* Must be called with rcu_read_lock or ovs_mutex. */
159 static const char *ovs_dp_name(const struct datapath *dp)
161 struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
162 return vport->ops->get_name(vport);
165 static int get_dpifindex(struct datapath *dp)
172 local = ovs_vport_rcu(dp, OVSP_LOCAL);
174 ifindex = netdev_vport_priv(local)->dev->ifindex;
183 static void destroy_dp_rcu(struct rcu_head *rcu)
185 struct datapath *dp = container_of(rcu, struct datapath, rcu);
187 free_percpu(dp->stats_percpu);
188 release_net(ovs_dp_get_net(dp));
193 static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
196 return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
199 /* Called with ovs_mutex or RCU read lock. */
200 struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
203 struct hlist_head *head;
205 head = vport_hash_bucket(dp, port_no);
206 hlist_for_each_entry_rcu(vport, head, dp_hash_node) {
207 if (vport->port_no == port_no)
213 /* Called with ovs_mutex. */
214 static struct vport *new_vport(const struct vport_parms *parms)
218 vport = ovs_vport_add(parms);
219 if (!IS_ERR(vport)) {
220 struct datapath *dp = parms->dp;
221 struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
223 hlist_add_head_rcu(&vport->dp_hash_node, head);
228 void ovs_dp_detach_port(struct vport *p)
232 /* First drop references to device. */
233 hlist_del_rcu(&p->dp_hash_node);
235 /* Then destroy it. */
239 /* Must be called with rcu_read_lock. */
240 void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb)
242 struct datapath *dp = p->dp;
243 struct sw_flow *flow;
244 struct dp_stats_percpu *stats;
245 struct sw_flow_key key;
250 stats = this_cpu_ptr(dp->stats_percpu);
252 /* Extract flow from 'skb' into 'key'. */
253 error = ovs_flow_extract(skb, p->port_no, &key);
254 if (unlikely(error)) {
260 flow = ovs_flow_tbl_lookup_stats(&dp->table, &key, &n_mask_hit);
261 if (unlikely(!flow)) {
262 struct dp_upcall_info upcall;
264 upcall.cmd = OVS_PACKET_CMD_MISS;
266 upcall.userdata = NULL;
267 upcall.portid = ovs_vport_find_upcall_portid(p, skb);
268 ovs_dp_upcall(dp, skb, &upcall);
270 stats_counter = &stats->n_missed;
274 OVS_CB(skb)->flow = flow;
275 OVS_CB(skb)->pkt_key = &key;
277 ovs_flow_stats_update(OVS_CB(skb)->flow, key.tp.flags, skb);
278 ovs_execute_actions(dp, skb);
279 stats_counter = &stats->n_hit;
282 /* Update datapath statistics. */
283 u64_stats_update_begin(&stats->syncp);
285 stats->n_mask_hit += n_mask_hit;
286 u64_stats_update_end(&stats->syncp);
289 int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
290 const struct dp_upcall_info *upcall_info)
292 struct dp_stats_percpu *stats;
295 if (upcall_info->portid == 0) {
300 if (!skb_is_gso(skb))
301 err = queue_userspace_packet(dp, skb, upcall_info);
303 err = queue_gso_packets(dp, skb, upcall_info);
310 stats = this_cpu_ptr(dp->stats_percpu);
312 u64_stats_update_begin(&stats->syncp);
314 u64_stats_update_end(&stats->syncp);
319 static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
320 const struct dp_upcall_info *upcall_info)
322 unsigned short gso_type = skb_shinfo(skb)->gso_type;
323 struct dp_upcall_info later_info;
324 struct sw_flow_key later_key;
325 struct sk_buff *segs, *nskb;
328 segs = __skb_gso_segment(skb, NETIF_F_SG, false);
330 return PTR_ERR(segs);
332 /* Queue all of the segments. */
335 err = queue_userspace_packet(dp, skb, upcall_info);
339 if (skb == segs && gso_type & SKB_GSO_UDP) {
340 /* The initial flow key extracted by ovs_flow_extract()
341 * in this case is for a first fragment, so we need to
342 * properly mark later fragments.
344 later_key = *upcall_info->key;
345 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
347 later_info = *upcall_info;
348 later_info.key = &later_key;
349 upcall_info = &later_info;
351 } while ((skb = skb->next));
353 /* Free all of the segments. */
361 } while ((skb = nskb));
365 static size_t key_attr_size(void)
367 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
368 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
369 + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
370 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */
371 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */
372 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
373 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
374 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
375 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
376 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
377 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
378 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
379 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
380 + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */
381 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
382 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
383 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
384 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
385 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
388 static size_t upcall_msg_size(const struct nlattr *userdata,
391 size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
392 + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */
393 + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */
395 /* OVS_PACKET_ATTR_USERDATA */
397 size += NLA_ALIGN(userdata->nla_len);
402 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
403 const struct dp_upcall_info *upcall_info)
405 struct ovs_header *upcall;
406 struct sk_buff *nskb = NULL;
407 struct sk_buff *user_skb; /* to be queued to userspace */
409 struct genl_info info = {
410 .dst_sk = ovs_dp_get_net(dp)->genl_sock,
411 .snd_portid = upcall_info->portid,
417 dp_ifindex = get_dpifindex(dp);
421 if (vlan_tx_tag_present(skb)) {
422 nskb = skb_clone(skb, GFP_ATOMIC);
426 nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb));
434 if (nla_attr_size(skb->len) > USHRT_MAX) {
439 /* Complete checksum if needed */
440 if (skb->ip_summed == CHECKSUM_PARTIAL &&
441 (err = skb_checksum_help(skb)))
444 /* Older versions of OVS user space enforce alignment of the last
445 * Netlink attribute to NLA_ALIGNTO which would require extensive
446 * padding logic. Only perform zerocopy if padding is not required.
448 if (dp->user_features & OVS_DP_F_UNALIGNED)
449 hlen = skb_zerocopy_headlen(skb);
453 len = upcall_msg_size(upcall_info->userdata, hlen);
454 user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC);
460 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
461 0, upcall_info->cmd);
462 upcall->dp_ifindex = dp_ifindex;
464 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
465 err = ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb);
467 nla_nest_end(user_skb, nla);
469 if (upcall_info->userdata)
470 __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
471 nla_len(upcall_info->userdata),
472 nla_data(upcall_info->userdata));
474 /* Only reserve room for attribute header, packet data is added
475 * in skb_zerocopy() */
476 if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) {
480 nla->nla_len = nla_attr_size(skb->len);
482 err = skb_zerocopy(user_skb, skb, skb->len, hlen);
486 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
487 if (!(dp->user_features & OVS_DP_F_UNALIGNED)) {
488 size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len;
491 memset(skb_put(user_skb, plen), 0, plen);
494 ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len;
496 err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid);
504 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
506 struct ovs_header *ovs_header = info->userhdr;
507 struct nlattr **a = info->attrs;
508 struct sw_flow_actions *acts;
509 struct sk_buff *packet;
510 struct sw_flow *flow;
517 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
518 !a[OVS_PACKET_ATTR_ACTIONS])
521 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
522 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
526 skb_reserve(packet, NET_IP_ALIGN);
528 nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
530 skb_reset_mac_header(packet);
531 eth = eth_hdr(packet);
533 /* Normally, setting the skb 'protocol' field would be handled by a
534 * call to eth_type_trans(), but it assumes there's a sending
535 * device, which we may not have. */
536 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
537 packet->protocol = eth->h_proto;
539 packet->protocol = htons(ETH_P_802_2);
541 /* Build an sw_flow for sending this packet. */
542 flow = ovs_flow_alloc();
547 err = ovs_flow_extract(packet, -1, &flow->key);
551 err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]);
554 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS]));
559 err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS],
560 &flow->key, 0, &acts);
561 rcu_assign_pointer(flow->sf_acts, acts);
565 OVS_CB(packet)->flow = flow;
566 OVS_CB(packet)->pkt_key = &flow->key;
567 packet->priority = flow->key.phy.priority;
568 packet->mark = flow->key.phy.skb_mark;
571 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
577 err = ovs_execute_actions(dp, packet);
581 ovs_flow_free(flow, false);
587 ovs_flow_free(flow, false);
594 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
595 [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
596 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
597 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
600 static const struct genl_ops dp_packet_genl_ops[] = {
601 { .cmd = OVS_PACKET_CMD_EXECUTE,
602 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
603 .policy = packet_policy,
604 .doit = ovs_packet_cmd_execute
608 static struct genl_family dp_packet_genl_family = {
609 .id = GENL_ID_GENERATE,
610 .hdrsize = sizeof(struct ovs_header),
611 .name = OVS_PACKET_FAMILY,
612 .version = OVS_PACKET_VERSION,
613 .maxattr = OVS_PACKET_ATTR_MAX,
615 .parallel_ops = true,
616 .ops = dp_packet_genl_ops,
617 .n_ops = ARRAY_SIZE(dp_packet_genl_ops),
620 static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats,
621 struct ovs_dp_megaflow_stats *mega_stats)
625 memset(mega_stats, 0, sizeof(*mega_stats));
627 stats->n_flows = ovs_flow_tbl_count(&dp->table);
628 mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table);
630 stats->n_hit = stats->n_missed = stats->n_lost = 0;
632 for_each_possible_cpu(i) {
633 const struct dp_stats_percpu *percpu_stats;
634 struct dp_stats_percpu local_stats;
637 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
640 start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
641 local_stats = *percpu_stats;
642 } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start));
644 stats->n_hit += local_stats.n_hit;
645 stats->n_missed += local_stats.n_missed;
646 stats->n_lost += local_stats.n_lost;
647 mega_stats->n_mask_hit += local_stats.n_mask_hit;
651 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)
653 return NLMSG_ALIGN(sizeof(struct ovs_header))
654 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */
655 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */
656 + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
657 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
658 + nla_total_size(8) /* OVS_FLOW_ATTR_USED */
659 + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */
662 /* Called with ovs_mutex or RCU read lock. */
663 static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex,
664 struct sk_buff *skb, u32 portid,
665 u32 seq, u32 flags, u8 cmd)
667 const int skb_orig_len = skb->len;
668 struct nlattr *start;
669 struct ovs_flow_stats stats;
672 struct ovs_header *ovs_header;
676 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd);
680 ovs_header->dp_ifindex = dp_ifindex;
683 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
685 goto nla_put_failure;
687 err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb);
690 nla_nest_end(skb, nla);
692 nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK);
694 goto nla_put_failure;
696 err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb);
700 nla_nest_end(skb, nla);
702 ovs_flow_stats_get(flow, &stats, &used, &tcp_flags);
705 nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used)))
706 goto nla_put_failure;
708 if (stats.n_packets &&
709 nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats))
710 goto nla_put_failure;
712 if ((u8)ntohs(tcp_flags) &&
713 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags)))
714 goto nla_put_failure;
716 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
717 * this is the first flow to be dumped into 'skb'. This is unusual for
718 * Netlink but individual action lists can be longer than
719 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
720 * The userspace caller can always fetch the actions separately if it
721 * really wants them. (Most userspace callers in fact don't care.)
723 * This can only fail for dump operations because the skb is always
724 * properly sized for single flows.
726 start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS);
728 const struct sw_flow_actions *sf_acts;
730 sf_acts = rcu_dereference_ovsl(flow->sf_acts);
731 err = ovs_nla_put_actions(sf_acts->actions,
732 sf_acts->actions_len, skb);
735 nla_nest_end(skb, start);
740 nla_nest_cancel(skb, start);
742 } else if (skb_orig_len)
743 goto nla_put_failure;
745 return genlmsg_end(skb, ovs_header);
750 genlmsg_cancel(skb, ovs_header);
754 /* May not be called with RCU read lock. */
755 static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts,
756 struct genl_info *info,
761 if (!always && !ovs_must_notify(info, &ovs_dp_flow_multicast_group))
764 skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL);
766 return ERR_PTR(-ENOMEM);
771 /* Called with ovs_mutex. */
772 static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow,
774 struct genl_info *info, u8 cmd,
780 skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info,
782 if (IS_ERR_OR_NULL(skb))
785 retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb,
786 info->snd_portid, info->snd_seq, 0,
792 static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info)
794 struct nlattr **a = info->attrs;
795 struct ovs_header *ovs_header = info->userhdr;
796 struct sw_flow *flow, *new_flow;
797 struct sw_flow_mask mask;
798 struct sk_buff *reply;
800 struct sw_flow_actions *acts;
801 struct sw_flow_match match;
804 /* Must have key and actions. */
806 if (!a[OVS_FLOW_ATTR_KEY])
808 if (!a[OVS_FLOW_ATTR_ACTIONS])
811 /* Most of the time we need to allocate a new flow, do it before
814 new_flow = ovs_flow_alloc();
815 if (IS_ERR(new_flow)) {
816 error = PTR_ERR(new_flow);
821 ovs_match_init(&match, &new_flow->unmasked_key, &mask);
822 error = ovs_nla_get_match(&match,
823 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
827 ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask);
829 /* Validate actions. */
830 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
831 error = PTR_ERR(acts);
835 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key,
838 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
842 reply = ovs_flow_cmd_alloc_info(acts, info, false);
844 error = PTR_ERR(reply);
849 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
854 /* Check if this is a duplicate flow */
855 flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key);
857 rcu_assign_pointer(new_flow->sf_acts, acts);
859 /* Put flow in bucket. */
860 error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask);
861 if (unlikely(error)) {
866 if (unlikely(reply)) {
867 error = ovs_flow_cmd_fill_info(new_flow,
868 ovs_header->dp_ifindex,
869 reply, info->snd_portid,
876 struct sw_flow_actions *old_acts;
878 /* Bail out if we're not allowed to modify an existing flow.
879 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
880 * because Generic Netlink treats the latter as a dump
881 * request. We also accept NLM_F_EXCL in case that bug ever
884 if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE
889 /* The unmasked key has to be the same for flow updates. */
890 if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) {
891 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
897 /* Update actions. */
898 old_acts = ovsl_dereference(flow->sf_acts);
899 rcu_assign_pointer(flow->sf_acts, acts);
901 if (unlikely(reply)) {
902 error = ovs_flow_cmd_fill_info(flow,
903 ovs_header->dp_ifindex,
904 reply, info->snd_portid,
911 ovs_nla_free_flow_actions(old_acts);
912 ovs_flow_free(new_flow, false);
916 ovs_notify(&dp_flow_genl_family, reply, info);
925 ovs_flow_free(new_flow, false);
930 static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info)
932 struct nlattr **a = info->attrs;
933 struct ovs_header *ovs_header = info->userhdr;
934 struct sw_flow_key key, masked_key;
935 struct sw_flow *flow;
936 struct sw_flow_mask mask;
937 struct sk_buff *reply = NULL;
939 struct sw_flow_actions *old_acts = NULL, *acts = NULL;
940 struct sw_flow_match match;
945 if (!a[OVS_FLOW_ATTR_KEY])
948 ovs_match_init(&match, &key, &mask);
949 error = ovs_nla_get_match(&match,
950 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
954 /* Validate actions. */
955 if (a[OVS_FLOW_ATTR_ACTIONS]) {
956 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
957 error = PTR_ERR(acts);
961 ovs_flow_mask_key(&masked_key, &key, &mask);
962 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS],
963 &masked_key, 0, &acts);
965 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
970 /* Can allocate before locking if have acts. */
972 reply = ovs_flow_cmd_alloc_info(acts, info, false);
974 error = PTR_ERR(reply);
980 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
985 /* Check that the flow exists. */
986 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
987 if (unlikely(!flow)) {
992 /* Update actions, if present. */
994 old_acts = ovsl_dereference(flow->sf_acts);
995 rcu_assign_pointer(flow->sf_acts, acts);
997 if (unlikely(reply)) {
998 error = ovs_flow_cmd_fill_info(flow,
999 ovs_header->dp_ifindex,
1000 reply, info->snd_portid,
1006 /* Could not alloc without acts before locking. */
1007 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex,
1008 info, OVS_FLOW_CMD_NEW, false);
1009 if (unlikely(IS_ERR(reply))) {
1010 error = PTR_ERR(reply);
1011 goto err_unlock_ovs;
1016 if (a[OVS_FLOW_ATTR_CLEAR])
1017 ovs_flow_stats_clear(flow);
1021 ovs_notify(&dp_flow_genl_family, reply, info);
1023 ovs_nla_free_flow_actions(old_acts);
1036 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
1038 struct nlattr **a = info->attrs;
1039 struct ovs_header *ovs_header = info->userhdr;
1040 struct sw_flow_key key;
1041 struct sk_buff *reply;
1042 struct sw_flow *flow;
1043 struct datapath *dp;
1044 struct sw_flow_match match;
1047 if (!a[OVS_FLOW_ATTR_KEY]) {
1048 OVS_NLERR("Flow get message rejected, Key attribute missing.\n");
1052 ovs_match_init(&match, &key, NULL);
1053 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
1058 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1064 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
1070 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info,
1071 OVS_FLOW_CMD_NEW, true);
1072 if (IS_ERR(reply)) {
1073 err = PTR_ERR(reply);
1078 return genlmsg_reply(reply, info);
1084 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
1086 struct nlattr **a = info->attrs;
1087 struct ovs_header *ovs_header = info->userhdr;
1088 struct sw_flow_key key;
1089 struct sk_buff *reply;
1090 struct sw_flow *flow;
1091 struct datapath *dp;
1092 struct sw_flow_match match;
1095 if (likely(a[OVS_FLOW_ATTR_KEY])) {
1096 ovs_match_init(&match, &key, NULL);
1097 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
1103 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1104 if (unlikely(!dp)) {
1109 if (unlikely(!a[OVS_FLOW_ATTR_KEY])) {
1110 err = ovs_flow_tbl_flush(&dp->table);
1114 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
1115 if (unlikely(!flow)) {
1120 ovs_flow_tbl_remove(&dp->table, flow);
1123 reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts,
1125 if (likely(reply)) {
1126 if (likely(!IS_ERR(reply))) {
1127 rcu_read_lock(); /*To keep RCU checker happy. */
1128 err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex,
1129 reply, info->snd_portid,
1135 ovs_notify(&dp_flow_genl_family, reply, info);
1137 netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply));
1141 ovs_flow_free(flow, true);
1148 static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1150 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1151 struct table_instance *ti;
1152 struct datapath *dp;
1155 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1161 ti = rcu_dereference(dp->table.ti);
1163 struct sw_flow *flow;
1166 bucket = cb->args[0];
1168 flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj);
1172 if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb,
1173 NETLINK_CB(cb->skb).portid,
1174 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1175 OVS_FLOW_CMD_NEW) < 0)
1178 cb->args[0] = bucket;
1185 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
1186 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
1187 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
1188 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
1191 static const struct genl_ops dp_flow_genl_ops[] = {
1192 { .cmd = OVS_FLOW_CMD_NEW,
1193 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1194 .policy = flow_policy,
1195 .doit = ovs_flow_cmd_new
1197 { .cmd = OVS_FLOW_CMD_DEL,
1198 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1199 .policy = flow_policy,
1200 .doit = ovs_flow_cmd_del
1202 { .cmd = OVS_FLOW_CMD_GET,
1203 .flags = 0, /* OK for unprivileged users. */
1204 .policy = flow_policy,
1205 .doit = ovs_flow_cmd_get,
1206 .dumpit = ovs_flow_cmd_dump
1208 { .cmd = OVS_FLOW_CMD_SET,
1209 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1210 .policy = flow_policy,
1211 .doit = ovs_flow_cmd_set,
1215 static struct genl_family dp_flow_genl_family = {
1216 .id = GENL_ID_GENERATE,
1217 .hdrsize = sizeof(struct ovs_header),
1218 .name = OVS_FLOW_FAMILY,
1219 .version = OVS_FLOW_VERSION,
1220 .maxattr = OVS_FLOW_ATTR_MAX,
1222 .parallel_ops = true,
1223 .ops = dp_flow_genl_ops,
1224 .n_ops = ARRAY_SIZE(dp_flow_genl_ops),
1225 .mcgrps = &ovs_dp_flow_multicast_group,
1229 static size_t ovs_dp_cmd_msg_size(void)
1231 size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header));
1233 msgsize += nla_total_size(IFNAMSIZ);
1234 msgsize += nla_total_size(sizeof(struct ovs_dp_stats));
1235 msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats));
1236 msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */
1241 /* Called with ovs_mutex or RCU read lock. */
1242 static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
1243 u32 portid, u32 seq, u32 flags, u8 cmd)
1245 struct ovs_header *ovs_header;
1246 struct ovs_dp_stats dp_stats;
1247 struct ovs_dp_megaflow_stats dp_megaflow_stats;
1250 ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
1255 ovs_header->dp_ifindex = get_dpifindex(dp);
1257 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
1259 goto nla_put_failure;
1261 get_dp_stats(dp, &dp_stats, &dp_megaflow_stats);
1262 if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats),
1264 goto nla_put_failure;
1266 if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS,
1267 sizeof(struct ovs_dp_megaflow_stats),
1268 &dp_megaflow_stats))
1269 goto nla_put_failure;
1271 if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features))
1272 goto nla_put_failure;
1274 return genlmsg_end(skb, ovs_header);
1277 genlmsg_cancel(skb, ovs_header);
1282 static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info)
1284 return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL);
1287 /* Called with rcu_read_lock or ovs_mutex. */
1288 static struct datapath *lookup_datapath(struct net *net,
1289 struct ovs_header *ovs_header,
1290 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1292 struct datapath *dp;
1294 if (!a[OVS_DP_ATTR_NAME])
1295 dp = get_dp(net, ovs_header->dp_ifindex);
1297 struct vport *vport;
1299 vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
1300 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1302 return dp ? dp : ERR_PTR(-ENODEV);
1305 static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info)
1307 struct datapath *dp;
1309 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1313 WARN(dp->user_features, "Dropping previously announced user features\n");
1314 dp->user_features = 0;
1317 static void ovs_dp_change(struct datapath *dp, struct nlattr **a)
1319 if (a[OVS_DP_ATTR_USER_FEATURES])
1320 dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]);
1323 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1325 struct nlattr **a = info->attrs;
1326 struct vport_parms parms;
1327 struct sk_buff *reply;
1328 struct datapath *dp;
1329 struct vport *vport;
1330 struct ovs_net *ovs_net;
1334 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1337 reply = ovs_dp_cmd_alloc_info(info);
1342 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1344 goto err_free_reply;
1346 ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
1348 /* Allocate table. */
1349 err = ovs_flow_tbl_init(&dp->table);
1353 dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu);
1354 if (!dp->stats_percpu) {
1356 goto err_destroy_table;
1359 dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
1363 goto err_destroy_percpu;
1366 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
1367 INIT_HLIST_HEAD(&dp->ports[i]);
1369 /* Set up our datapath device. */
1370 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1371 parms.type = OVS_VPORT_TYPE_INTERNAL;
1372 parms.options = NULL;
1374 parms.port_no = OVSP_LOCAL;
1375 parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID];
1377 ovs_dp_change(dp, a);
1379 /* So far only local changes have been made, now need the lock. */
1382 vport = new_vport(&parms);
1383 if (IS_ERR(vport)) {
1384 err = PTR_ERR(vport);
1388 if (err == -EEXIST) {
1389 /* An outdated user space instance that does not understand
1390 * the concept of user_features has attempted to create a new
1391 * datapath and is likely to reuse it. Drop all user features.
1393 if (info->genlhdr->version < OVS_DP_VER_FEATURES)
1394 ovs_dp_reset_user_features(skb, info);
1397 goto err_destroy_ports_array;
1400 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1401 info->snd_seq, 0, OVS_DP_CMD_NEW);
1404 ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
1405 list_add_tail_rcu(&dp->list_node, &ovs_net->dps);
1409 ovs_notify(&dp_datapath_genl_family, reply, info);
1412 err_destroy_ports_array:
1416 free_percpu(dp->stats_percpu);
1418 ovs_flow_tbl_destroy(&dp->table, false);
1420 release_net(ovs_dp_get_net(dp));
1428 /* Called with ovs_mutex. */
1429 static void __dp_destroy(struct datapath *dp)
1433 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
1434 struct vport *vport;
1435 struct hlist_node *n;
1437 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node)
1438 if (vport->port_no != OVSP_LOCAL)
1439 ovs_dp_detach_port(vport);
1442 list_del_rcu(&dp->list_node);
1444 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1445 * all ports in datapath are destroyed first before freeing datapath.
1447 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
1449 /* RCU destroy the flow table */
1450 ovs_flow_tbl_destroy(&dp->table, true);
1452 call_rcu(&dp->rcu, destroy_dp_rcu);
1455 static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1457 struct sk_buff *reply;
1458 struct datapath *dp;
1461 reply = ovs_dp_cmd_alloc_info(info);
1466 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1469 goto err_unlock_free;
1471 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1472 info->snd_seq, 0, OVS_DP_CMD_DEL);
1478 ovs_notify(&dp_datapath_genl_family, reply, info);
1488 static int ovs_dp_cmd_set(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 ovs_dp_change(dp, info->attrs);
1506 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1507 info->snd_seq, 0, OVS_DP_CMD_NEW);
1511 ovs_notify(&dp_datapath_genl_family, reply, info);
1521 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1523 struct sk_buff *reply;
1524 struct datapath *dp;
1527 reply = ovs_dp_cmd_alloc_info(info);
1532 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1535 goto err_unlock_free;
1537 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1538 info->snd_seq, 0, OVS_DP_CMD_NEW);
1542 return genlmsg_reply(reply, info);
1550 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1552 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
1553 struct datapath *dp;
1554 int skip = cb->args[0];
1558 list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) {
1560 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
1561 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1562 OVS_DP_CMD_NEW) < 0)
1573 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1574 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1575 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1576 [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
1579 static const struct genl_ops dp_datapath_genl_ops[] = {
1580 { .cmd = OVS_DP_CMD_NEW,
1581 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1582 .policy = datapath_policy,
1583 .doit = ovs_dp_cmd_new
1585 { .cmd = OVS_DP_CMD_DEL,
1586 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1587 .policy = datapath_policy,
1588 .doit = ovs_dp_cmd_del
1590 { .cmd = OVS_DP_CMD_GET,
1591 .flags = 0, /* OK for unprivileged users. */
1592 .policy = datapath_policy,
1593 .doit = ovs_dp_cmd_get,
1594 .dumpit = ovs_dp_cmd_dump
1596 { .cmd = OVS_DP_CMD_SET,
1597 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1598 .policy = datapath_policy,
1599 .doit = ovs_dp_cmd_set,
1603 static struct genl_family dp_datapath_genl_family = {
1604 .id = GENL_ID_GENERATE,
1605 .hdrsize = sizeof(struct ovs_header),
1606 .name = OVS_DATAPATH_FAMILY,
1607 .version = OVS_DATAPATH_VERSION,
1608 .maxattr = OVS_DP_ATTR_MAX,
1610 .parallel_ops = true,
1611 .ops = dp_datapath_genl_ops,
1612 .n_ops = ARRAY_SIZE(dp_datapath_genl_ops),
1613 .mcgrps = &ovs_dp_datapath_multicast_group,
1617 /* Called with ovs_mutex or RCU read lock. */
1618 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
1619 u32 portid, u32 seq, u32 flags, u8 cmd)
1621 struct ovs_header *ovs_header;
1622 struct ovs_vport_stats vport_stats;
1625 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
1630 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1632 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
1633 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
1634 nla_put_string(skb, OVS_VPORT_ATTR_NAME,
1635 vport->ops->get_name(vport)))
1636 goto nla_put_failure;
1638 ovs_vport_get_stats(vport, &vport_stats);
1639 if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
1641 goto nla_put_failure;
1643 if (ovs_vport_get_upcall_portids(vport, skb))
1644 goto nla_put_failure;
1646 err = ovs_vport_get_options(vport, skb);
1647 if (err == -EMSGSIZE)
1650 return genlmsg_end(skb, ovs_header);
1655 genlmsg_cancel(skb, ovs_header);
1659 static struct sk_buff *ovs_vport_cmd_alloc_info(void)
1661 return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1664 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1665 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid,
1668 struct sk_buff *skb;
1671 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1673 return ERR_PTR(-ENOMEM);
1675 retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd);
1681 /* Called with ovs_mutex or RCU read lock. */
1682 static struct vport *lookup_vport(struct net *net,
1683 struct ovs_header *ovs_header,
1684 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1686 struct datapath *dp;
1687 struct vport *vport;
1689 if (a[OVS_VPORT_ATTR_NAME]) {
1690 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
1692 return ERR_PTR(-ENODEV);
1693 if (ovs_header->dp_ifindex &&
1694 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
1695 return ERR_PTR(-ENODEV);
1697 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1698 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1700 if (port_no >= DP_MAX_PORTS)
1701 return ERR_PTR(-EFBIG);
1703 dp = get_dp(net, ovs_header->dp_ifindex);
1705 return ERR_PTR(-ENODEV);
1707 vport = ovs_vport_ovsl_rcu(dp, port_no);
1709 return ERR_PTR(-ENODEV);
1712 return ERR_PTR(-EINVAL);
1715 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1717 struct nlattr **a = info->attrs;
1718 struct ovs_header *ovs_header = info->userhdr;
1719 struct vport_parms parms;
1720 struct sk_buff *reply;
1721 struct vport *vport;
1722 struct datapath *dp;
1726 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1727 !a[OVS_VPORT_ATTR_UPCALL_PID])
1730 port_no = a[OVS_VPORT_ATTR_PORT_NO]
1731 ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0;
1732 if (port_no >= DP_MAX_PORTS)
1735 reply = ovs_vport_cmd_alloc_info();
1740 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1743 goto exit_unlock_free;
1746 vport = ovs_vport_ovsl(dp, port_no);
1749 goto exit_unlock_free;
1751 for (port_no = 1; ; port_no++) {
1752 if (port_no >= DP_MAX_PORTS) {
1754 goto exit_unlock_free;
1756 vport = ovs_vport_ovsl(dp, port_no);
1762 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1763 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1764 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1766 parms.port_no = port_no;
1767 parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID];
1769 vport = new_vport(&parms);
1770 err = PTR_ERR(vport);
1772 goto exit_unlock_free;
1774 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1775 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1779 ovs_notify(&dp_vport_genl_family, reply, info);
1788 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1790 struct nlattr **a = info->attrs;
1791 struct sk_buff *reply;
1792 struct vport *vport;
1795 reply = ovs_vport_cmd_alloc_info();
1800 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1801 err = PTR_ERR(vport);
1803 goto exit_unlock_free;
1805 if (a[OVS_VPORT_ATTR_TYPE] &&
1806 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
1808 goto exit_unlock_free;
1811 if (a[OVS_VPORT_ATTR_OPTIONS]) {
1812 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
1814 goto exit_unlock_free;
1818 if (a[OVS_VPORT_ATTR_UPCALL_PID]) {
1819 struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID];
1821 err = ovs_vport_set_upcall_portids(vport, ids);
1823 goto exit_unlock_free;
1826 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1827 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1831 ovs_notify(&dp_vport_genl_family, reply, info);
1840 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1842 struct nlattr **a = info->attrs;
1843 struct sk_buff *reply;
1844 struct vport *vport;
1847 reply = ovs_vport_cmd_alloc_info();
1852 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1853 err = PTR_ERR(vport);
1855 goto exit_unlock_free;
1857 if (vport->port_no == OVSP_LOCAL) {
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_DEL);
1865 ovs_dp_detach_port(vport);
1868 ovs_notify(&dp_vport_genl_family, reply, info);
1877 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1879 struct nlattr **a = info->attrs;
1880 struct ovs_header *ovs_header = info->userhdr;
1881 struct sk_buff *reply;
1882 struct vport *vport;
1885 reply = ovs_vport_cmd_alloc_info();
1890 vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
1891 err = PTR_ERR(vport);
1893 goto exit_unlock_free;
1894 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1895 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1899 return genlmsg_reply(reply, info);
1907 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1909 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1910 struct datapath *dp;
1911 int bucket = cb->args[0], skip = cb->args[1];
1915 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1920 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
1921 struct vport *vport;
1924 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
1926 ovs_vport_cmd_fill_info(vport, skb,
1927 NETLINK_CB(cb->skb).portid,
1930 OVS_VPORT_CMD_NEW) < 0)
1946 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1947 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1948 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1949 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1950 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1951 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1952 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1955 static const struct genl_ops dp_vport_genl_ops[] = {
1956 { .cmd = OVS_VPORT_CMD_NEW,
1957 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1958 .policy = vport_policy,
1959 .doit = ovs_vport_cmd_new
1961 { .cmd = OVS_VPORT_CMD_DEL,
1962 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1963 .policy = vport_policy,
1964 .doit = ovs_vport_cmd_del
1966 { .cmd = OVS_VPORT_CMD_GET,
1967 .flags = 0, /* OK for unprivileged users. */
1968 .policy = vport_policy,
1969 .doit = ovs_vport_cmd_get,
1970 .dumpit = ovs_vport_cmd_dump
1972 { .cmd = OVS_VPORT_CMD_SET,
1973 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1974 .policy = vport_policy,
1975 .doit = ovs_vport_cmd_set,
1979 struct genl_family dp_vport_genl_family = {
1980 .id = GENL_ID_GENERATE,
1981 .hdrsize = sizeof(struct ovs_header),
1982 .name = OVS_VPORT_FAMILY,
1983 .version = OVS_VPORT_VERSION,
1984 .maxattr = OVS_VPORT_ATTR_MAX,
1986 .parallel_ops = true,
1987 .ops = dp_vport_genl_ops,
1988 .n_ops = ARRAY_SIZE(dp_vport_genl_ops),
1989 .mcgrps = &ovs_dp_vport_multicast_group,
1993 static struct genl_family * const dp_genl_families[] = {
1994 &dp_datapath_genl_family,
1995 &dp_vport_genl_family,
1996 &dp_flow_genl_family,
1997 &dp_packet_genl_family,
2000 static void dp_unregister_genl(int n_families)
2004 for (i = 0; i < n_families; i++)
2005 genl_unregister_family(dp_genl_families[i]);
2008 static int dp_register_genl(void)
2013 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
2015 err = genl_register_family(dp_genl_families[i]);
2023 dp_unregister_genl(i);
2027 static int __net_init ovs_init_net(struct net *net)
2029 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2031 INIT_LIST_HEAD(&ovs_net->dps);
2032 INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
2036 static void __net_exit ovs_exit_net(struct net *net)
2038 struct datapath *dp, *dp_next;
2039 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2042 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
2046 cancel_work_sync(&ovs_net->dp_notify_work);
2049 static struct pernet_operations ovs_net_ops = {
2050 .init = ovs_init_net,
2051 .exit = ovs_exit_net,
2053 .size = sizeof(struct ovs_net),
2056 static int __init dp_init(void)
2060 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
2062 pr_info("Open vSwitch switching datapath\n");
2064 err = ovs_internal_dev_rtnl_link_register();
2068 err = ovs_flow_init();
2070 goto error_unreg_rtnl_link;
2072 err = ovs_vport_init();
2074 goto error_flow_exit;
2076 err = register_pernet_device(&ovs_net_ops);
2078 goto error_vport_exit;
2080 err = register_netdevice_notifier(&ovs_dp_device_notifier);
2082 goto error_netns_exit;
2084 err = dp_register_genl();
2086 goto error_unreg_notifier;
2090 error_unreg_notifier:
2091 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2093 unregister_pernet_device(&ovs_net_ops);
2098 error_unreg_rtnl_link:
2099 ovs_internal_dev_rtnl_link_unregister();
2104 static void dp_cleanup(void)
2106 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
2107 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2108 unregister_pernet_device(&ovs_net_ops);
2112 ovs_internal_dev_rtnl_link_unregister();
2115 module_init(dp_init);
2116 module_exit(dp_cleanup);
2118 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2119 MODULE_LICENSE("GPL");