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 error = ovs_dp_upcall(dp, skb, &upcall);
273 stats_counter = &stats->n_missed;
277 OVS_CB(skb)->flow = flow;
278 OVS_CB(skb)->pkt_key = &key;
280 ovs_flow_stats_update(OVS_CB(skb)->flow, key.tp.flags, skb);
281 ovs_execute_actions(dp, skb);
282 stats_counter = &stats->n_hit;
285 /* Update datapath statistics. */
286 u64_stats_update_begin(&stats->syncp);
288 stats->n_mask_hit += n_mask_hit;
289 u64_stats_update_end(&stats->syncp);
292 int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
293 const struct dp_upcall_info *upcall_info)
295 struct dp_stats_percpu *stats;
298 if (upcall_info->portid == 0) {
303 if (!skb_is_gso(skb))
304 err = queue_userspace_packet(dp, skb, upcall_info);
306 err = queue_gso_packets(dp, skb, upcall_info);
313 stats = this_cpu_ptr(dp->stats_percpu);
315 u64_stats_update_begin(&stats->syncp);
317 u64_stats_update_end(&stats->syncp);
322 static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
323 const struct dp_upcall_info *upcall_info)
325 unsigned short gso_type = skb_shinfo(skb)->gso_type;
326 struct dp_upcall_info later_info;
327 struct sw_flow_key later_key;
328 struct sk_buff *segs, *nskb;
331 segs = __skb_gso_segment(skb, NETIF_F_SG, false);
333 return PTR_ERR(segs);
335 /* Queue all of the segments. */
338 err = queue_userspace_packet(dp, skb, upcall_info);
342 if (skb == segs && gso_type & SKB_GSO_UDP) {
343 /* The initial flow key extracted by ovs_flow_extract()
344 * in this case is for a first fragment, so we need to
345 * properly mark later fragments.
347 later_key = *upcall_info->key;
348 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
350 later_info = *upcall_info;
351 later_info.key = &later_key;
352 upcall_info = &later_info;
354 } while ((skb = skb->next));
356 /* Free all of the segments. */
364 } while ((skb = nskb));
368 static size_t key_attr_size(void)
370 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
371 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
372 + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
373 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */
374 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */
375 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
376 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
377 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
378 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
379 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
380 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
381 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
382 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
383 + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */
384 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
385 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
386 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
387 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
388 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
391 static size_t upcall_msg_size(const struct nlattr *userdata,
394 size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
395 + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */
396 + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */
398 /* OVS_PACKET_ATTR_USERDATA */
400 size += NLA_ALIGN(userdata->nla_len);
405 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
406 const struct dp_upcall_info *upcall_info)
408 struct ovs_header *upcall;
409 struct sk_buff *nskb = NULL;
410 struct sk_buff *user_skb = NULL; /* to be queued to userspace */
412 struct genl_info info = {
413 .dst_sk = ovs_dp_get_net(dp)->genl_sock,
414 .snd_portid = upcall_info->portid,
420 dp_ifindex = get_dpifindex(dp);
424 if (vlan_tx_tag_present(skb)) {
425 nskb = skb_clone(skb, GFP_ATOMIC);
429 nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb));
437 if (nla_attr_size(skb->len) > USHRT_MAX) {
442 /* Complete checksum if needed */
443 if (skb->ip_summed == CHECKSUM_PARTIAL &&
444 (err = skb_checksum_help(skb)))
447 /* Older versions of OVS user space enforce alignment of the last
448 * Netlink attribute to NLA_ALIGNTO which would require extensive
449 * padding logic. Only perform zerocopy if padding is not required.
451 if (dp->user_features & OVS_DP_F_UNALIGNED)
452 hlen = skb_zerocopy_headlen(skb);
456 len = upcall_msg_size(upcall_info->userdata, hlen);
457 user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC);
463 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
464 0, upcall_info->cmd);
465 upcall->dp_ifindex = dp_ifindex;
467 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
468 err = ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb);
470 nla_nest_end(user_skb, nla);
472 if (upcall_info->userdata)
473 __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
474 nla_len(upcall_info->userdata),
475 nla_data(upcall_info->userdata));
477 /* Only reserve room for attribute header, packet data is added
478 * in skb_zerocopy() */
479 if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) {
483 nla->nla_len = nla_attr_size(skb->len);
485 err = skb_zerocopy(user_skb, skb, skb->len, hlen);
489 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
490 if (!(dp->user_features & OVS_DP_F_UNALIGNED)) {
491 size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len;
494 memset(skb_put(user_skb, plen), 0, plen);
497 ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len;
499 err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid);
509 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
511 struct ovs_header *ovs_header = info->userhdr;
512 struct nlattr **a = info->attrs;
513 struct sw_flow_actions *acts;
514 struct sk_buff *packet;
515 struct sw_flow *flow;
522 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
523 !a[OVS_PACKET_ATTR_ACTIONS])
526 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
527 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
531 skb_reserve(packet, NET_IP_ALIGN);
533 nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
535 skb_reset_mac_header(packet);
536 eth = eth_hdr(packet);
538 /* Normally, setting the skb 'protocol' field would be handled by a
539 * call to eth_type_trans(), but it assumes there's a sending
540 * device, which we may not have. */
541 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
542 packet->protocol = eth->h_proto;
544 packet->protocol = htons(ETH_P_802_2);
546 /* Build an sw_flow for sending this packet. */
547 flow = ovs_flow_alloc();
552 err = ovs_flow_extract(packet, -1, &flow->key);
556 err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]);
559 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS]));
564 err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS],
565 &flow->key, 0, &acts);
566 rcu_assign_pointer(flow->sf_acts, acts);
570 OVS_CB(packet)->flow = flow;
571 OVS_CB(packet)->pkt_key = &flow->key;
572 packet->priority = flow->key.phy.priority;
573 packet->mark = flow->key.phy.skb_mark;
576 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
582 err = ovs_execute_actions(dp, packet);
586 ovs_flow_free(flow, false);
592 ovs_flow_free(flow, false);
599 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
600 [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
601 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
602 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
605 static const struct genl_ops dp_packet_genl_ops[] = {
606 { .cmd = OVS_PACKET_CMD_EXECUTE,
607 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
608 .policy = packet_policy,
609 .doit = ovs_packet_cmd_execute
613 static struct genl_family dp_packet_genl_family = {
614 .id = GENL_ID_GENERATE,
615 .hdrsize = sizeof(struct ovs_header),
616 .name = OVS_PACKET_FAMILY,
617 .version = OVS_PACKET_VERSION,
618 .maxattr = OVS_PACKET_ATTR_MAX,
620 .parallel_ops = true,
621 .ops = dp_packet_genl_ops,
622 .n_ops = ARRAY_SIZE(dp_packet_genl_ops),
625 static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats,
626 struct ovs_dp_megaflow_stats *mega_stats)
630 memset(mega_stats, 0, sizeof(*mega_stats));
632 stats->n_flows = ovs_flow_tbl_count(&dp->table);
633 mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table);
635 stats->n_hit = stats->n_missed = stats->n_lost = 0;
637 for_each_possible_cpu(i) {
638 const struct dp_stats_percpu *percpu_stats;
639 struct dp_stats_percpu local_stats;
642 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
645 start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
646 local_stats = *percpu_stats;
647 } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start));
649 stats->n_hit += local_stats.n_hit;
650 stats->n_missed += local_stats.n_missed;
651 stats->n_lost += local_stats.n_lost;
652 mega_stats->n_mask_hit += local_stats.n_mask_hit;
656 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)
658 return NLMSG_ALIGN(sizeof(struct ovs_header))
659 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */
660 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */
661 + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
662 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
663 + nla_total_size(8) /* OVS_FLOW_ATTR_USED */
664 + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */
667 /* Called with ovs_mutex or RCU read lock. */
668 static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex,
669 struct sk_buff *skb, u32 portid,
670 u32 seq, u32 flags, u8 cmd)
672 const int skb_orig_len = skb->len;
673 struct nlattr *start;
674 struct ovs_flow_stats stats;
677 struct ovs_header *ovs_header;
681 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd);
685 ovs_header->dp_ifindex = dp_ifindex;
688 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
690 goto nla_put_failure;
692 err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb);
695 nla_nest_end(skb, nla);
697 nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK);
699 goto nla_put_failure;
701 err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb);
705 nla_nest_end(skb, nla);
707 ovs_flow_stats_get(flow, &stats, &used, &tcp_flags);
710 nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used)))
711 goto nla_put_failure;
713 if (stats.n_packets &&
714 nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats))
715 goto nla_put_failure;
717 if ((u8)ntohs(tcp_flags) &&
718 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags)))
719 goto nla_put_failure;
721 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
722 * this is the first flow to be dumped into 'skb'. This is unusual for
723 * Netlink but individual action lists can be longer than
724 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
725 * The userspace caller can always fetch the actions separately if it
726 * really wants them. (Most userspace callers in fact don't care.)
728 * This can only fail for dump operations because the skb is always
729 * properly sized for single flows.
731 start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS);
733 const struct sw_flow_actions *sf_acts;
735 sf_acts = rcu_dereference_ovsl(flow->sf_acts);
736 err = ovs_nla_put_actions(sf_acts->actions,
737 sf_acts->actions_len, skb);
740 nla_nest_end(skb, start);
745 nla_nest_cancel(skb, start);
747 } else if (skb_orig_len)
748 goto nla_put_failure;
750 return genlmsg_end(skb, ovs_header);
755 genlmsg_cancel(skb, ovs_header);
759 /* May not be called with RCU read lock. */
760 static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts,
761 struct genl_info *info,
766 if (!always && !ovs_must_notify(info, &ovs_dp_flow_multicast_group))
769 skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL);
771 return ERR_PTR(-ENOMEM);
776 /* Called with ovs_mutex. */
777 static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow,
779 struct genl_info *info, u8 cmd,
785 skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info,
787 if (IS_ERR_OR_NULL(skb))
790 retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb,
791 info->snd_portid, info->snd_seq, 0,
797 static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info)
799 struct nlattr **a = info->attrs;
800 struct ovs_header *ovs_header = info->userhdr;
801 struct sw_flow *flow, *new_flow;
802 struct sw_flow_mask mask;
803 struct sk_buff *reply;
805 struct sw_flow_actions *acts;
806 struct sw_flow_match match;
809 /* Must have key and actions. */
811 if (!a[OVS_FLOW_ATTR_KEY])
813 if (!a[OVS_FLOW_ATTR_ACTIONS])
816 /* Most of the time we need to allocate a new flow, do it before
819 new_flow = ovs_flow_alloc();
820 if (IS_ERR(new_flow)) {
821 error = PTR_ERR(new_flow);
826 ovs_match_init(&match, &new_flow->unmasked_key, &mask);
827 error = ovs_nla_get_match(&match,
828 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
832 ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask);
834 /* Validate actions. */
835 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
836 error = PTR_ERR(acts);
840 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key,
843 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
847 reply = ovs_flow_cmd_alloc_info(acts, info, false);
849 error = PTR_ERR(reply);
854 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
859 /* Check if this is a duplicate flow */
860 flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key);
862 rcu_assign_pointer(new_flow->sf_acts, acts);
864 /* Put flow in bucket. */
865 error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask);
866 if (unlikely(error)) {
871 if (unlikely(reply)) {
872 error = ovs_flow_cmd_fill_info(new_flow,
873 ovs_header->dp_ifindex,
874 reply, info->snd_portid,
881 struct sw_flow_actions *old_acts;
883 /* Bail out if we're not allowed to modify an existing flow.
884 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
885 * because Generic Netlink treats the latter as a dump
886 * request. We also accept NLM_F_EXCL in case that bug ever
889 if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE
894 /* The unmasked key has to be the same for flow updates. */
895 if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) {
896 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
902 /* Update actions. */
903 old_acts = ovsl_dereference(flow->sf_acts);
904 rcu_assign_pointer(flow->sf_acts, acts);
906 if (unlikely(reply)) {
907 error = ovs_flow_cmd_fill_info(flow,
908 ovs_header->dp_ifindex,
909 reply, info->snd_portid,
916 ovs_nla_free_flow_actions(old_acts);
917 ovs_flow_free(new_flow, false);
921 ovs_notify(&dp_flow_genl_family, reply, info);
930 ovs_flow_free(new_flow, false);
935 static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info)
937 struct nlattr **a = info->attrs;
938 struct ovs_header *ovs_header = info->userhdr;
939 struct sw_flow_key key, masked_key;
940 struct sw_flow *flow;
941 struct sw_flow_mask mask;
942 struct sk_buff *reply = NULL;
944 struct sw_flow_actions *old_acts = NULL, *acts = NULL;
945 struct sw_flow_match match;
950 if (!a[OVS_FLOW_ATTR_KEY])
953 ovs_match_init(&match, &key, &mask);
954 error = ovs_nla_get_match(&match,
955 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
959 /* Validate actions. */
960 if (a[OVS_FLOW_ATTR_ACTIONS]) {
961 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
962 error = PTR_ERR(acts);
966 ovs_flow_mask_key(&masked_key, &key, &mask);
967 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS],
968 &masked_key, 0, &acts);
970 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
975 /* Can allocate before locking if have acts. */
977 reply = ovs_flow_cmd_alloc_info(acts, info, false);
979 error = PTR_ERR(reply);
985 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
990 /* Check that the flow exists. */
991 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
992 if (unlikely(!flow)) {
997 /* Update actions, if present. */
999 old_acts = ovsl_dereference(flow->sf_acts);
1000 rcu_assign_pointer(flow->sf_acts, acts);
1002 if (unlikely(reply)) {
1003 error = ovs_flow_cmd_fill_info(flow,
1004 ovs_header->dp_ifindex,
1005 reply, info->snd_portid,
1011 /* Could not alloc without acts before locking. */
1012 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex,
1013 info, OVS_FLOW_CMD_NEW, false);
1014 if (unlikely(IS_ERR(reply))) {
1015 error = PTR_ERR(reply);
1016 goto err_unlock_ovs;
1021 if (a[OVS_FLOW_ATTR_CLEAR])
1022 ovs_flow_stats_clear(flow);
1026 ovs_notify(&dp_flow_genl_family, reply, info);
1028 ovs_nla_free_flow_actions(old_acts);
1041 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
1043 struct nlattr **a = info->attrs;
1044 struct ovs_header *ovs_header = info->userhdr;
1045 struct sw_flow_key key;
1046 struct sk_buff *reply;
1047 struct sw_flow *flow;
1048 struct datapath *dp;
1049 struct sw_flow_match match;
1052 if (!a[OVS_FLOW_ATTR_KEY]) {
1053 OVS_NLERR("Flow get message rejected, Key attribute missing.\n");
1057 ovs_match_init(&match, &key, NULL);
1058 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
1063 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1069 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
1075 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info,
1076 OVS_FLOW_CMD_NEW, true);
1077 if (IS_ERR(reply)) {
1078 err = PTR_ERR(reply);
1083 return genlmsg_reply(reply, info);
1089 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
1091 struct nlattr **a = info->attrs;
1092 struct ovs_header *ovs_header = info->userhdr;
1093 struct sw_flow_key key;
1094 struct sk_buff *reply;
1095 struct sw_flow *flow;
1096 struct datapath *dp;
1097 struct sw_flow_match match;
1100 if (likely(a[OVS_FLOW_ATTR_KEY])) {
1101 ovs_match_init(&match, &key, NULL);
1102 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
1108 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1109 if (unlikely(!dp)) {
1114 if (unlikely(!a[OVS_FLOW_ATTR_KEY])) {
1115 err = ovs_flow_tbl_flush(&dp->table);
1119 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
1120 if (unlikely(!flow)) {
1125 ovs_flow_tbl_remove(&dp->table, flow);
1128 reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts,
1130 if (likely(reply)) {
1131 if (likely(!IS_ERR(reply))) {
1132 rcu_read_lock(); /*To keep RCU checker happy. */
1133 err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex,
1134 reply, info->snd_portid,
1140 ovs_notify(&dp_flow_genl_family, reply, info);
1142 netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply));
1146 ovs_flow_free(flow, true);
1153 static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1155 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1156 struct table_instance *ti;
1157 struct datapath *dp;
1160 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1166 ti = rcu_dereference(dp->table.ti);
1168 struct sw_flow *flow;
1171 bucket = cb->args[0];
1173 flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj);
1177 if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb,
1178 NETLINK_CB(cb->skb).portid,
1179 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1180 OVS_FLOW_CMD_NEW) < 0)
1183 cb->args[0] = bucket;
1190 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
1191 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
1192 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
1193 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
1196 static const struct genl_ops dp_flow_genl_ops[] = {
1197 { .cmd = OVS_FLOW_CMD_NEW,
1198 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1199 .policy = flow_policy,
1200 .doit = ovs_flow_cmd_new
1202 { .cmd = OVS_FLOW_CMD_DEL,
1203 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1204 .policy = flow_policy,
1205 .doit = ovs_flow_cmd_del
1207 { .cmd = OVS_FLOW_CMD_GET,
1208 .flags = 0, /* OK for unprivileged users. */
1209 .policy = flow_policy,
1210 .doit = ovs_flow_cmd_get,
1211 .dumpit = ovs_flow_cmd_dump
1213 { .cmd = OVS_FLOW_CMD_SET,
1214 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1215 .policy = flow_policy,
1216 .doit = ovs_flow_cmd_set,
1220 static struct genl_family dp_flow_genl_family = {
1221 .id = GENL_ID_GENERATE,
1222 .hdrsize = sizeof(struct ovs_header),
1223 .name = OVS_FLOW_FAMILY,
1224 .version = OVS_FLOW_VERSION,
1225 .maxattr = OVS_FLOW_ATTR_MAX,
1227 .parallel_ops = true,
1228 .ops = dp_flow_genl_ops,
1229 .n_ops = ARRAY_SIZE(dp_flow_genl_ops),
1230 .mcgrps = &ovs_dp_flow_multicast_group,
1234 static size_t ovs_dp_cmd_msg_size(void)
1236 size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header));
1238 msgsize += nla_total_size(IFNAMSIZ);
1239 msgsize += nla_total_size(sizeof(struct ovs_dp_stats));
1240 msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats));
1241 msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */
1246 /* Called with ovs_mutex or RCU read lock. */
1247 static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
1248 u32 portid, u32 seq, u32 flags, u8 cmd)
1250 struct ovs_header *ovs_header;
1251 struct ovs_dp_stats dp_stats;
1252 struct ovs_dp_megaflow_stats dp_megaflow_stats;
1255 ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
1260 ovs_header->dp_ifindex = get_dpifindex(dp);
1262 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
1264 goto nla_put_failure;
1266 get_dp_stats(dp, &dp_stats, &dp_megaflow_stats);
1267 if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats),
1269 goto nla_put_failure;
1271 if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS,
1272 sizeof(struct ovs_dp_megaflow_stats),
1273 &dp_megaflow_stats))
1274 goto nla_put_failure;
1276 if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features))
1277 goto nla_put_failure;
1279 return genlmsg_end(skb, ovs_header);
1282 genlmsg_cancel(skb, ovs_header);
1287 static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info)
1289 return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL);
1292 /* Called with rcu_read_lock or ovs_mutex. */
1293 static struct datapath *lookup_datapath(struct net *net,
1294 struct ovs_header *ovs_header,
1295 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1297 struct datapath *dp;
1299 if (!a[OVS_DP_ATTR_NAME])
1300 dp = get_dp(net, ovs_header->dp_ifindex);
1302 struct vport *vport;
1304 vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
1305 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1307 return dp ? dp : ERR_PTR(-ENODEV);
1310 static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info)
1312 struct datapath *dp;
1314 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1318 WARN(dp->user_features, "Dropping previously announced user features\n");
1319 dp->user_features = 0;
1322 static void ovs_dp_change(struct datapath *dp, struct nlattr **a)
1324 if (a[OVS_DP_ATTR_USER_FEATURES])
1325 dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]);
1328 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1330 struct nlattr **a = info->attrs;
1331 struct vport_parms parms;
1332 struct sk_buff *reply;
1333 struct datapath *dp;
1334 struct vport *vport;
1335 struct ovs_net *ovs_net;
1339 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1342 reply = ovs_dp_cmd_alloc_info(info);
1347 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1349 goto err_free_reply;
1351 ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
1353 /* Allocate table. */
1354 err = ovs_flow_tbl_init(&dp->table);
1358 dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu);
1359 if (!dp->stats_percpu) {
1361 goto err_destroy_table;
1364 dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
1368 goto err_destroy_percpu;
1371 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
1372 INIT_HLIST_HEAD(&dp->ports[i]);
1374 /* Set up our datapath device. */
1375 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1376 parms.type = OVS_VPORT_TYPE_INTERNAL;
1377 parms.options = NULL;
1379 parms.port_no = OVSP_LOCAL;
1380 parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID];
1382 ovs_dp_change(dp, a);
1384 /* So far only local changes have been made, now need the lock. */
1387 vport = new_vport(&parms);
1388 if (IS_ERR(vport)) {
1389 err = PTR_ERR(vport);
1393 if (err == -EEXIST) {
1394 /* An outdated user space instance that does not understand
1395 * the concept of user_features has attempted to create a new
1396 * datapath and is likely to reuse it. Drop all user features.
1398 if (info->genlhdr->version < OVS_DP_VER_FEATURES)
1399 ovs_dp_reset_user_features(skb, info);
1402 goto err_destroy_ports_array;
1405 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1406 info->snd_seq, 0, OVS_DP_CMD_NEW);
1409 ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
1410 list_add_tail_rcu(&dp->list_node, &ovs_net->dps);
1414 ovs_notify(&dp_datapath_genl_family, reply, info);
1417 err_destroy_ports_array:
1421 free_percpu(dp->stats_percpu);
1423 ovs_flow_tbl_destroy(&dp->table, false);
1425 release_net(ovs_dp_get_net(dp));
1433 /* Called with ovs_mutex. */
1434 static void __dp_destroy(struct datapath *dp)
1438 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
1439 struct vport *vport;
1440 struct hlist_node *n;
1442 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node)
1443 if (vport->port_no != OVSP_LOCAL)
1444 ovs_dp_detach_port(vport);
1447 list_del_rcu(&dp->list_node);
1449 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1450 * all ports in datapath are destroyed first before freeing datapath.
1452 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
1454 /* RCU destroy the flow table */
1455 ovs_flow_tbl_destroy(&dp->table, true);
1457 call_rcu(&dp->rcu, destroy_dp_rcu);
1460 static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1462 struct sk_buff *reply;
1463 struct datapath *dp;
1466 reply = ovs_dp_cmd_alloc_info(info);
1471 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1474 goto err_unlock_free;
1476 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1477 info->snd_seq, 0, OVS_DP_CMD_DEL);
1483 ovs_notify(&dp_datapath_genl_family, reply, info);
1493 static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1495 struct sk_buff *reply;
1496 struct datapath *dp;
1499 reply = ovs_dp_cmd_alloc_info(info);
1504 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1507 goto err_unlock_free;
1509 ovs_dp_change(dp, info->attrs);
1511 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1512 info->snd_seq, 0, OVS_DP_CMD_NEW);
1516 ovs_notify(&dp_datapath_genl_family, reply, info);
1526 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1528 struct sk_buff *reply;
1529 struct datapath *dp;
1532 reply = ovs_dp_cmd_alloc_info(info);
1537 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1540 goto err_unlock_free;
1542 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1543 info->snd_seq, 0, OVS_DP_CMD_NEW);
1547 return genlmsg_reply(reply, info);
1555 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1557 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
1558 struct datapath *dp;
1559 int skip = cb->args[0];
1563 list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) {
1565 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
1566 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1567 OVS_DP_CMD_NEW) < 0)
1578 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1579 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1580 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1581 [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
1584 static const struct genl_ops dp_datapath_genl_ops[] = {
1585 { .cmd = OVS_DP_CMD_NEW,
1586 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1587 .policy = datapath_policy,
1588 .doit = ovs_dp_cmd_new
1590 { .cmd = OVS_DP_CMD_DEL,
1591 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1592 .policy = datapath_policy,
1593 .doit = ovs_dp_cmd_del
1595 { .cmd = OVS_DP_CMD_GET,
1596 .flags = 0, /* OK for unprivileged users. */
1597 .policy = datapath_policy,
1598 .doit = ovs_dp_cmd_get,
1599 .dumpit = ovs_dp_cmd_dump
1601 { .cmd = OVS_DP_CMD_SET,
1602 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1603 .policy = datapath_policy,
1604 .doit = ovs_dp_cmd_set,
1608 static struct genl_family dp_datapath_genl_family = {
1609 .id = GENL_ID_GENERATE,
1610 .hdrsize = sizeof(struct ovs_header),
1611 .name = OVS_DATAPATH_FAMILY,
1612 .version = OVS_DATAPATH_VERSION,
1613 .maxattr = OVS_DP_ATTR_MAX,
1615 .parallel_ops = true,
1616 .ops = dp_datapath_genl_ops,
1617 .n_ops = ARRAY_SIZE(dp_datapath_genl_ops),
1618 .mcgrps = &ovs_dp_datapath_multicast_group,
1622 /* Called with ovs_mutex or RCU read lock. */
1623 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
1624 u32 portid, u32 seq, u32 flags, u8 cmd)
1626 struct ovs_header *ovs_header;
1627 struct ovs_vport_stats vport_stats;
1630 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
1635 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1637 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
1638 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
1639 nla_put_string(skb, OVS_VPORT_ATTR_NAME,
1640 vport->ops->get_name(vport)))
1641 goto nla_put_failure;
1643 ovs_vport_get_stats(vport, &vport_stats);
1644 if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
1646 goto nla_put_failure;
1648 if (ovs_vport_get_upcall_portids(vport, skb))
1649 goto nla_put_failure;
1651 err = ovs_vport_get_options(vport, skb);
1652 if (err == -EMSGSIZE)
1655 return genlmsg_end(skb, ovs_header);
1660 genlmsg_cancel(skb, ovs_header);
1664 static struct sk_buff *ovs_vport_cmd_alloc_info(void)
1666 return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1669 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1670 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid,
1673 struct sk_buff *skb;
1676 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1678 return ERR_PTR(-ENOMEM);
1680 retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd);
1686 /* Called with ovs_mutex or RCU read lock. */
1687 static struct vport *lookup_vport(struct net *net,
1688 struct ovs_header *ovs_header,
1689 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1691 struct datapath *dp;
1692 struct vport *vport;
1694 if (a[OVS_VPORT_ATTR_NAME]) {
1695 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
1697 return ERR_PTR(-ENODEV);
1698 if (ovs_header->dp_ifindex &&
1699 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
1700 return ERR_PTR(-ENODEV);
1702 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1703 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1705 if (port_no >= DP_MAX_PORTS)
1706 return ERR_PTR(-EFBIG);
1708 dp = get_dp(net, ovs_header->dp_ifindex);
1710 return ERR_PTR(-ENODEV);
1712 vport = ovs_vport_ovsl_rcu(dp, port_no);
1714 return ERR_PTR(-ENODEV);
1717 return ERR_PTR(-EINVAL);
1720 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1722 struct nlattr **a = info->attrs;
1723 struct ovs_header *ovs_header = info->userhdr;
1724 struct vport_parms parms;
1725 struct sk_buff *reply;
1726 struct vport *vport;
1727 struct datapath *dp;
1731 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1732 !a[OVS_VPORT_ATTR_UPCALL_PID])
1735 port_no = a[OVS_VPORT_ATTR_PORT_NO]
1736 ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0;
1737 if (port_no >= DP_MAX_PORTS)
1740 reply = ovs_vport_cmd_alloc_info();
1745 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1748 goto exit_unlock_free;
1751 vport = ovs_vport_ovsl(dp, port_no);
1754 goto exit_unlock_free;
1756 for (port_no = 1; ; port_no++) {
1757 if (port_no >= DP_MAX_PORTS) {
1759 goto exit_unlock_free;
1761 vport = ovs_vport_ovsl(dp, port_no);
1767 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1768 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1769 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1771 parms.port_no = port_no;
1772 parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID];
1774 vport = new_vport(&parms);
1775 err = PTR_ERR(vport);
1777 goto exit_unlock_free;
1779 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1780 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1784 ovs_notify(&dp_vport_genl_family, reply, info);
1793 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1795 struct nlattr **a = info->attrs;
1796 struct sk_buff *reply;
1797 struct vport *vport;
1800 reply = ovs_vport_cmd_alloc_info();
1805 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1806 err = PTR_ERR(vport);
1808 goto exit_unlock_free;
1810 if (a[OVS_VPORT_ATTR_TYPE] &&
1811 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
1813 goto exit_unlock_free;
1816 if (a[OVS_VPORT_ATTR_OPTIONS]) {
1817 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
1819 goto exit_unlock_free;
1823 if (a[OVS_VPORT_ATTR_UPCALL_PID]) {
1824 struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID];
1826 err = ovs_vport_set_upcall_portids(vport, ids);
1828 goto exit_unlock_free;
1831 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1832 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1836 ovs_notify(&dp_vport_genl_family, reply, info);
1845 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1847 struct nlattr **a = info->attrs;
1848 struct sk_buff *reply;
1849 struct vport *vport;
1852 reply = ovs_vport_cmd_alloc_info();
1857 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1858 err = PTR_ERR(vport);
1860 goto exit_unlock_free;
1862 if (vport->port_no == OVSP_LOCAL) {
1864 goto exit_unlock_free;
1867 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1868 info->snd_seq, 0, OVS_VPORT_CMD_DEL);
1870 ovs_dp_detach_port(vport);
1873 ovs_notify(&dp_vport_genl_family, reply, info);
1882 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1884 struct nlattr **a = info->attrs;
1885 struct ovs_header *ovs_header = info->userhdr;
1886 struct sk_buff *reply;
1887 struct vport *vport;
1890 reply = ovs_vport_cmd_alloc_info();
1895 vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
1896 err = PTR_ERR(vport);
1898 goto exit_unlock_free;
1899 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1900 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1904 return genlmsg_reply(reply, info);
1912 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1914 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1915 struct datapath *dp;
1916 int bucket = cb->args[0], skip = cb->args[1];
1920 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1925 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
1926 struct vport *vport;
1929 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
1931 ovs_vport_cmd_fill_info(vport, skb,
1932 NETLINK_CB(cb->skb).portid,
1935 OVS_VPORT_CMD_NEW) < 0)
1951 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1952 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1953 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1954 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1955 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1956 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1957 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1960 static const struct genl_ops dp_vport_genl_ops[] = {
1961 { .cmd = OVS_VPORT_CMD_NEW,
1962 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1963 .policy = vport_policy,
1964 .doit = ovs_vport_cmd_new
1966 { .cmd = OVS_VPORT_CMD_DEL,
1967 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1968 .policy = vport_policy,
1969 .doit = ovs_vport_cmd_del
1971 { .cmd = OVS_VPORT_CMD_GET,
1972 .flags = 0, /* OK for unprivileged users. */
1973 .policy = vport_policy,
1974 .doit = ovs_vport_cmd_get,
1975 .dumpit = ovs_vport_cmd_dump
1977 { .cmd = OVS_VPORT_CMD_SET,
1978 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1979 .policy = vport_policy,
1980 .doit = ovs_vport_cmd_set,
1984 struct genl_family dp_vport_genl_family = {
1985 .id = GENL_ID_GENERATE,
1986 .hdrsize = sizeof(struct ovs_header),
1987 .name = OVS_VPORT_FAMILY,
1988 .version = OVS_VPORT_VERSION,
1989 .maxattr = OVS_VPORT_ATTR_MAX,
1991 .parallel_ops = true,
1992 .ops = dp_vport_genl_ops,
1993 .n_ops = ARRAY_SIZE(dp_vport_genl_ops),
1994 .mcgrps = &ovs_dp_vport_multicast_group,
1998 static struct genl_family * const dp_genl_families[] = {
1999 &dp_datapath_genl_family,
2000 &dp_vport_genl_family,
2001 &dp_flow_genl_family,
2002 &dp_packet_genl_family,
2005 static void dp_unregister_genl(int n_families)
2009 for (i = 0; i < n_families; i++)
2010 genl_unregister_family(dp_genl_families[i]);
2013 static int dp_register_genl(void)
2018 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
2020 err = genl_register_family(dp_genl_families[i]);
2028 dp_unregister_genl(i);
2032 static int __net_init ovs_init_net(struct net *net)
2034 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2036 INIT_LIST_HEAD(&ovs_net->dps);
2037 INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
2041 static void __net_exit ovs_exit_net(struct net *net)
2043 struct datapath *dp, *dp_next;
2044 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2047 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
2051 cancel_work_sync(&ovs_net->dp_notify_work);
2054 static struct pernet_operations ovs_net_ops = {
2055 .init = ovs_init_net,
2056 .exit = ovs_exit_net,
2058 .size = sizeof(struct ovs_net),
2061 static int __init dp_init(void)
2065 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
2067 pr_info("Open vSwitch switching datapath\n");
2069 err = ovs_internal_dev_rtnl_link_register();
2073 err = ovs_flow_init();
2075 goto error_unreg_rtnl_link;
2077 err = ovs_vport_init();
2079 goto error_flow_exit;
2081 err = register_pernet_device(&ovs_net_ops);
2083 goto error_vport_exit;
2085 err = register_netdevice_notifier(&ovs_dp_device_notifier);
2087 goto error_netns_exit;
2089 err = dp_register_genl();
2091 goto error_unreg_notifier;
2095 error_unreg_notifier:
2096 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2098 unregister_pernet_device(&ovs_net_ops);
2103 error_unreg_rtnl_link:
2104 ovs_internal_dev_rtnl_link_unregister();
2109 static void dp_cleanup(void)
2111 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
2112 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2113 unregister_pernet_device(&ovs_net_ops);
2117 ovs_internal_dev_rtnl_link_unregister();
2120 module_init(dp_init);
2121 module_exit(dp_cleanup);
2123 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2124 MODULE_LICENSE("GPL");