2 * Copyright (c) 2007-2013 Nicira, Inc.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21 #include <linux/init.h>
22 #include <linux/module.h>
23 #include <linux/if_arp.h>
24 #include <linux/if_vlan.h>
27 #include <linux/jhash.h>
28 #include <linux/delay.h>
29 #include <linux/time.h>
30 #include <linux/etherdevice.h>
31 #include <linux/genetlink.h>
32 #include <linux/kernel.h>
33 #include <linux/kthread.h>
34 #include <linux/mutex.h>
35 #include <linux/percpu.h>
36 #include <linux/rcupdate.h>
37 #include <linux/tcp.h>
38 #include <linux/udp.h>
39 #include <linux/version.h>
40 #include <linux/ethtool.h>
41 #include <linux/wait.h>
42 #include <asm/div64.h>
43 #include <linux/highmem.h>
44 #include <linux/netfilter_bridge.h>
45 #include <linux/netfilter_ipv4.h>
46 #include <linux/inetdevice.h>
47 #include <linux/list.h>
48 #include <linux/openvswitch.h>
49 #include <linux/rculist.h>
50 #include <linux/dmi.h>
51 #include <linux/genetlink.h>
52 #include <net/genetlink.h>
53 #include <net/genetlink.h>
54 #include <net/net_namespace.h>
55 #include <net/netns/generic.h>
59 #include "flow_table.h"
60 #include "flow_netlink.h"
62 #include "vport-internal_dev.h"
63 #include "vport-netdev.h"
65 int ovs_net_id __read_mostly;
67 /* Check if need to build a reply message.
68 * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */
69 static bool ovs_must_notify(struct genl_info *info,
70 const struct genl_multicast_group *grp)
72 return info->nlhdr->nlmsg_flags & NLM_F_ECHO ||
73 netlink_has_listeners(genl_info_net(info)->genl_sock, grp->id);
76 static void ovs_notify(struct sk_buff *skb, struct genl_info *info,
77 struct genl_multicast_group *grp)
79 genl_notify(skb, genl_info_net(info), info->snd_portid,
80 grp->id, info->nlhdr, GFP_KERNEL);
86 * All writes e.g. Writes to device state (add/remove datapath, port, set
87 * operations on vports, etc.), Writes to other state (flow table
88 * modifications, set miscellaneous datapath parameters, etc.) are protected
91 * Reads are protected by RCU.
93 * There are a few special cases (mostly stats) that have their own
94 * synchronization but they nest under all of above and don't interact with
97 * The RTNL lock nests inside ovs_mutex.
100 static DEFINE_MUTEX(ovs_mutex);
104 mutex_lock(&ovs_mutex);
107 void ovs_unlock(void)
109 mutex_unlock(&ovs_mutex);
112 #ifdef CONFIG_LOCKDEP
113 int lockdep_ovsl_is_held(void)
116 return lockdep_is_held(&ovs_mutex);
122 static struct vport *new_vport(const struct vport_parms *);
123 static int queue_gso_packets(struct datapath *dp, struct sk_buff *,
124 const struct dp_upcall_info *);
125 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *,
126 const struct dp_upcall_info *);
128 /* Must be called with rcu_read_lock or ovs_mutex. */
129 static struct datapath *get_dp(struct net *net, int dp_ifindex)
131 struct datapath *dp = NULL;
132 struct net_device *dev;
135 dev = dev_get_by_index_rcu(net, dp_ifindex);
137 struct vport *vport = ovs_internal_dev_get_vport(dev);
146 /* Must be called with rcu_read_lock or ovs_mutex. */
147 const char *ovs_dp_name(const struct datapath *dp)
149 struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
150 return vport->ops->get_name(vport);
153 static int get_dpifindex(struct datapath *dp)
160 local = ovs_vport_rcu(dp, OVSP_LOCAL);
162 ifindex = netdev_vport_priv(local)->dev->ifindex;
171 static void destroy_dp_rcu(struct rcu_head *rcu)
173 struct datapath *dp = container_of(rcu, struct datapath, rcu);
175 free_percpu(dp->stats_percpu);
176 release_net(ovs_dp_get_net(dp));
181 static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
184 return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
187 /* Called with ovs_mutex or RCU read lock. */
188 struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
191 struct hlist_head *head;
193 head = vport_hash_bucket(dp, port_no);
194 hlist_for_each_entry_rcu(vport, head, dp_hash_node) {
195 if (vport->port_no == port_no)
201 /* Called with ovs_mutex. */
202 static struct vport *new_vport(const struct vport_parms *parms)
206 vport = ovs_vport_add(parms);
207 if (!IS_ERR(vport)) {
208 struct datapath *dp = parms->dp;
209 struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
211 hlist_add_head_rcu(&vport->dp_hash_node, head);
216 void ovs_dp_detach_port(struct vport *p)
220 /* First drop references to device. */
221 hlist_del_rcu(&p->dp_hash_node);
223 /* Then destroy it. */
227 /* Must be called with rcu_read_lock. */
228 void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb)
230 struct datapath *dp = p->dp;
231 struct sw_flow *flow;
232 struct dp_stats_percpu *stats;
233 struct sw_flow_key key;
238 stats = this_cpu_ptr(dp->stats_percpu);
240 /* Extract flow from 'skb' into 'key'. */
241 error = ovs_flow_extract(skb, p->port_no, &key);
242 if (unlikely(error)) {
248 flow = ovs_flow_tbl_lookup_stats(&dp->table, &key, &n_mask_hit);
249 if (unlikely(!flow)) {
250 struct dp_upcall_info upcall;
252 upcall.cmd = OVS_PACKET_CMD_MISS;
254 upcall.userdata = NULL;
255 upcall.portid = p->upcall_portid;
256 ovs_dp_upcall(dp, skb, &upcall);
258 stats_counter = &stats->n_missed;
262 OVS_CB(skb)->flow = flow;
263 OVS_CB(skb)->pkt_key = &key;
265 ovs_flow_stats_update(OVS_CB(skb)->flow, skb);
266 ovs_execute_actions(dp, skb);
267 stats_counter = &stats->n_hit;
270 /* Update datapath statistics. */
271 u64_stats_update_begin(&stats->sync);
273 stats->n_mask_hit += n_mask_hit;
274 u64_stats_update_end(&stats->sync);
277 static struct genl_family dp_packet_genl_family = {
278 .id = GENL_ID_GENERATE,
279 .hdrsize = sizeof(struct ovs_header),
280 .name = OVS_PACKET_FAMILY,
281 .version = OVS_PACKET_VERSION,
282 .maxattr = OVS_PACKET_ATTR_MAX,
287 int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
288 const struct dp_upcall_info *upcall_info)
290 struct dp_stats_percpu *stats;
293 if (upcall_info->portid == 0) {
298 if (!skb_is_gso(skb))
299 err = queue_userspace_packet(dp, skb, upcall_info);
301 err = queue_gso_packets(dp, skb, upcall_info);
308 stats = this_cpu_ptr(dp->stats_percpu);
310 u64_stats_update_begin(&stats->sync);
312 u64_stats_update_end(&stats->sync);
317 static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
318 const struct dp_upcall_info *upcall_info)
320 unsigned short gso_type = skb_shinfo(skb)->gso_type;
321 struct dp_upcall_info later_info;
322 struct sw_flow_key later_key;
323 struct sk_buff *segs, *nskb;
326 segs = __skb_gso_segment(skb, NETIF_F_SG, false);
328 return PTR_ERR(segs);
330 /* Queue all of the segments. */
333 err = queue_userspace_packet(dp, skb, upcall_info);
337 if (skb == segs && gso_type & SKB_GSO_UDP) {
338 /* The initial flow key extracted by ovs_flow_extract()
339 * in this case is for a first fragment, so we need to
340 * properly mark later fragments.
342 later_key = *upcall_info->key;
343 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
345 later_info = *upcall_info;
346 later_info.key = &later_key;
347 upcall_info = &later_info;
349 } while ((skb = skb->next));
351 /* Free all of the segments. */
359 } while ((skb = nskb));
363 static size_t key_attr_size(void)
365 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
366 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
367 + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
368 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */
369 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */
370 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
371 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
372 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
373 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
374 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
375 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
376 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
377 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
378 + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */
379 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
380 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
381 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
382 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
383 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
386 static size_t upcall_msg_size(const struct nlattr *userdata,
389 size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
390 + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */
391 + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */
393 /* OVS_PACKET_ATTR_USERDATA */
395 size += NLA_ALIGN(userdata->nla_len);
400 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
401 const struct dp_upcall_info *upcall_info)
403 struct ovs_header *upcall;
404 struct sk_buff *nskb = NULL;
405 struct sk_buff *user_skb; /* to be queued to userspace */
407 struct genl_info info = {
408 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)
409 .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));
430 vlan_set_tci(nskb, 0);
435 if (nla_attr_size(skb->len) > USHRT_MAX) {
440 /* Complete checksum if needed */
441 if (skb->ip_summed == CHECKSUM_PARTIAL &&
442 (err = skb_checksum_help(skb)))
445 /* Older versions of OVS user space enforce alignment of the last
446 * Netlink attribute to NLA_ALIGNTO which would require extensive
447 * padding logic. Only perform zerocopy if padding is not required.
449 if (dp->user_features & OVS_DP_F_UNALIGNED)
450 hlen = skb_zerocopy_headlen(skb);
454 len = upcall_msg_size(upcall_info->userdata, hlen);
455 user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC);
461 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
462 0, upcall_info->cmd);
463 upcall->dp_ifindex = dp_ifindex;
465 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
466 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 skb_zerocopy(user_skb, skb, skb->len, hlen);
484 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
485 if (!(dp->user_features & OVS_DP_F_UNALIGNED)) {
486 size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len;
489 memset(skb_put(user_skb, plen), 0, plen);
492 ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len;
494 err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid);
500 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
502 struct ovs_header *ovs_header = info->userhdr;
503 struct nlattr **a = info->attrs;
504 struct sw_flow_actions *acts;
505 struct sk_buff *packet;
506 struct sw_flow *flow;
513 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
514 !a[OVS_PACKET_ATTR_ACTIONS])
517 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
518 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
522 skb_reserve(packet, NET_IP_ALIGN);
524 nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
526 skb_reset_mac_header(packet);
527 eth = eth_hdr(packet);
529 /* Normally, setting the skb 'protocol' field would be handled by a
530 * call to eth_type_trans(), but it assumes there's a sending
531 * device, which we may not have. */
532 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
533 packet->protocol = eth->h_proto;
535 packet->protocol = htons(ETH_P_802_2);
537 /* Build an sw_flow for sending this packet. */
538 flow = ovs_flow_alloc();
543 err = ovs_flow_extract(packet, -1, &flow->key);
547 err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]);
550 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS]));
555 err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS],
556 &flow->key, 0, &acts);
557 rcu_assign_pointer(flow->sf_acts, acts);
561 OVS_CB(packet)->flow = flow;
562 OVS_CB(packet)->pkt_key = &flow->key;
563 packet->priority = flow->key.phy.priority;
564 packet->mark = flow->key.phy.skb_mark;
567 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
573 err = ovs_execute_actions(dp, packet);
577 ovs_flow_free(flow, false);
583 ovs_flow_free(flow, false);
590 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
591 [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
592 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
593 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
596 static struct genl_ops dp_packet_genl_ops[] = {
597 { .cmd = OVS_PACKET_CMD_EXECUTE,
598 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
599 .policy = packet_policy,
600 .doit = ovs_packet_cmd_execute
604 static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats,
605 struct ovs_dp_megaflow_stats *mega_stats)
609 memset(mega_stats, 0, sizeof(*mega_stats));
611 stats->n_flows = ovs_flow_tbl_count(&dp->table);
612 mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table);
614 stats->n_hit = stats->n_missed = stats->n_lost = 0;
616 for_each_possible_cpu(i) {
617 const struct dp_stats_percpu *percpu_stats;
618 struct dp_stats_percpu local_stats;
621 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
624 start = u64_stats_fetch_begin_bh(&percpu_stats->sync);
625 local_stats = *percpu_stats;
626 } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start));
628 stats->n_hit += local_stats.n_hit;
629 stats->n_missed += local_stats.n_missed;
630 stats->n_lost += local_stats.n_lost;
631 mega_stats->n_mask_hit += local_stats.n_mask_hit;
635 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
636 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
637 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
638 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
641 static struct genl_family dp_flow_genl_family = {
642 .id = GENL_ID_GENERATE,
643 .hdrsize = sizeof(struct ovs_header),
644 .name = OVS_FLOW_FAMILY,
645 .version = OVS_FLOW_VERSION,
646 .maxattr = OVS_FLOW_ATTR_MAX,
651 static struct genl_multicast_group ovs_dp_flow_multicast_group = {
652 .name = OVS_FLOW_MCGROUP
655 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)
657 return NLMSG_ALIGN(sizeof(struct ovs_header))
658 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */
659 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */
660 + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
661 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
662 + nla_total_size(8) /* OVS_FLOW_ATTR_USED */
663 + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */
666 /* Called with ovs_mutex or RCU read lock. */
667 static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex,
668 struct sk_buff *skb, u32 portid,
669 u32 seq, u32 flags, u8 cmd)
671 const int skb_orig_len = skb->len;
672 struct nlattr *start;
673 struct ovs_flow_stats stats;
676 struct ovs_header *ovs_header;
680 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd);
684 ovs_header->dp_ifindex = dp_ifindex;
687 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
689 goto nla_put_failure;
691 err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb);
694 nla_nest_end(skb, nla);
696 nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK);
698 goto nla_put_failure;
700 err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb);
704 nla_nest_end(skb, nla);
706 ovs_flow_stats_get(flow, &stats, &used, &tcp_flags);
709 nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used)))
710 goto nla_put_failure;
712 if (stats.n_packets &&
713 nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats))
714 goto nla_put_failure;
716 if ((u8)ntohs(tcp_flags) &&
717 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags)))
718 goto nla_put_failure;
720 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
721 * this is the first flow to be dumped into 'skb'. This is unusual for
722 * Netlink but individual action lists can be longer than
723 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
724 * The userspace caller can always fetch the actions separately if it
725 * really wants them. (Most userspace callers in fact don't care.)
727 * This can only fail for dump operations because the skb is always
728 * properly sized for single flows.
730 start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS);
732 const struct sw_flow_actions *sf_acts;
734 sf_acts = rcu_dereference_ovsl(flow->sf_acts);
735 err = ovs_nla_put_actions(sf_acts->actions,
736 sf_acts->actions_len, skb);
739 nla_nest_end(skb, start);
744 nla_nest_cancel(skb, start);
746 } else if (skb_orig_len)
747 goto nla_put_failure;
749 return genlmsg_end(skb, ovs_header);
754 genlmsg_cancel(skb, ovs_header);
758 /* May not be called with RCU read lock. */
759 static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts,
760 struct genl_info *info,
765 if (!always && !ovs_must_notify(info, &ovs_dp_flow_multicast_group))
768 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 (!skb || IS_ERR(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
818 new_flow = ovs_flow_alloc();
819 if (IS_ERR(new_flow)) {
820 error = PTR_ERR(new_flow);
825 ovs_match_init(&match, &new_flow->unmasked_key, &mask);
826 error = ovs_nla_get_match(&match,
827 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
831 ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask);
833 /* Validate actions. */
834 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
835 error = PTR_ERR(acts);
839 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key,
842 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
846 reply = ovs_flow_cmd_alloc_info(acts, info, false);
848 error = PTR_ERR(reply);
853 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
858 /* Check if this is a duplicate flow */
859 flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key);
861 rcu_assign_pointer(new_flow->sf_acts, acts);
863 /* Put flow in bucket. */
864 error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask);
865 if (unlikely(error)) {
870 if (unlikely(reply)) {
871 error = ovs_flow_cmd_fill_info(new_flow,
872 ovs_header->dp_ifindex,
873 reply, info->snd_portid,
880 struct sw_flow_actions *old_acts;
882 /* Bail out if we're not allowed to modify an existing flow.
883 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
884 * because Generic Netlink treats the latter as a dump
885 * request. We also accept NLM_F_EXCL in case that bug ever
888 if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE
893 /* The unmasked key has to be the same for flow updates. */
894 if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) {
898 /* Update actions. */
899 old_acts = ovsl_dereference(flow->sf_acts);
900 rcu_assign_pointer(flow->sf_acts, acts);
902 if (unlikely(reply)) {
903 error = ovs_flow_cmd_fill_info(flow,
904 ovs_header->dp_ifindex,
905 reply, info->snd_portid,
912 ovs_nla_free_flow_actions(old_acts);
913 ovs_flow_free(new_flow, false);
917 ovs_notify(reply, info, &ovs_dp_flow_multicast_group);
926 ovs_flow_free(new_flow, false);
931 static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info)
933 struct nlattr **a = info->attrs;
934 struct ovs_header *ovs_header = info->userhdr;
935 struct sw_flow_key key, masked_key;
936 struct sw_flow *flow;
937 struct sw_flow_mask mask;
938 struct sk_buff *reply = NULL;
940 struct sw_flow_actions *old_acts = NULL, *acts = NULL;
941 struct sw_flow_match match;
946 if (!a[OVS_FLOW_ATTR_KEY])
949 ovs_match_init(&match, &key, &mask);
950 error = ovs_nla_get_match(&match,
951 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
955 /* Validate actions. */
956 if (a[OVS_FLOW_ATTR_ACTIONS]) {
957 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
958 error = PTR_ERR(acts);
962 ovs_flow_mask_key(&masked_key, &key, &mask);
963 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS],
964 &masked_key, 0, &acts);
966 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
971 /* Can allocate before locking if have acts. */
973 reply = ovs_flow_cmd_alloc_info(acts, info, false);
975 error = PTR_ERR(reply);
981 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
986 /* Check that the flow exists. */
987 flow = ovs_flow_tbl_lookup(&dp->table, &key);
988 if (unlikely(!flow)) {
992 /* The unmasked key has to be the same for flow updates. */
993 if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) {
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(reply, info, &ovs_dp_flow_multicast_group);
1028 ovs_nla_free_flow_actions(old_acts);
1040 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
1042 struct nlattr **a = info->attrs;
1043 struct ovs_header *ovs_header = info->userhdr;
1044 struct sw_flow_key key;
1045 struct sk_buff *reply;
1046 struct sw_flow *flow;
1047 struct datapath *dp;
1048 struct sw_flow_match match;
1051 if (!a[OVS_FLOW_ATTR_KEY]) {
1052 OVS_NLERR("Flow get message rejected, Key attribute missing.\n");
1056 ovs_match_init(&match, &key, NULL);
1057 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
1062 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1068 flow = ovs_flow_tbl_lookup(&dp->table, &key);
1069 if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) {
1074 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info,
1075 OVS_FLOW_CMD_NEW, true);
1076 if (IS_ERR(reply)) {
1077 err = PTR_ERR(reply);
1082 return genlmsg_reply(reply, info);
1088 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
1090 struct nlattr **a = info->attrs;
1091 struct ovs_header *ovs_header = info->userhdr;
1092 struct sw_flow_key key;
1093 struct sk_buff *reply;
1094 struct sw_flow *flow;
1095 struct datapath *dp;
1096 struct sw_flow_match match;
1099 if (likely(a[OVS_FLOW_ATTR_KEY])) {
1100 ovs_match_init(&match, &key, NULL);
1101 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
1107 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1108 if (unlikely(!dp)) {
1112 if (unlikely(!a[OVS_FLOW_ATTR_KEY])) {
1113 err = ovs_flow_tbl_flush(&dp->table);
1116 flow = ovs_flow_tbl_lookup(&dp->table, &key);
1117 if (unlikely(!flow || !ovs_flow_cmp_unmasked_key(flow, &match))) {
1122 ovs_flow_tbl_remove(&dp->table, flow);
1125 reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *)flow->sf_acts,
1128 if (likely(reply)) {
1129 if (likely(!IS_ERR(reply))) {
1130 rcu_read_lock(); /* Keep RCU checker happy. */
1131 err = ovs_flow_cmd_fill_info(flow,
1132 ovs_header->dp_ifindex,
1133 reply, info->snd_portid,
1138 ovs_notify(reply, info, &ovs_dp_flow_multicast_group);
1140 netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
1141 ovs_dp_flow_multicast_group.id,
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 struct genl_ops dp_flow_genl_ops[] = {
1191 { .cmd = OVS_FLOW_CMD_NEW,
1192 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1193 .policy = flow_policy,
1194 .doit = ovs_flow_cmd_new
1196 { .cmd = OVS_FLOW_CMD_DEL,
1197 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1198 .policy = flow_policy,
1199 .doit = ovs_flow_cmd_del
1201 { .cmd = OVS_FLOW_CMD_GET,
1202 .flags = 0, /* OK for unprivileged users. */
1203 .policy = flow_policy,
1204 .doit = ovs_flow_cmd_get,
1205 .dumpit = ovs_flow_cmd_dump
1207 { .cmd = OVS_FLOW_CMD_SET,
1208 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1209 .policy = flow_policy,
1210 .doit = ovs_flow_cmd_set,
1214 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1215 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1216 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1217 [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
1220 static struct genl_family dp_datapath_genl_family = {
1221 .id = GENL_ID_GENERATE,
1222 .hdrsize = sizeof(struct ovs_header),
1223 .name = OVS_DATAPATH_FAMILY,
1224 .version = OVS_DATAPATH_VERSION,
1225 .maxattr = OVS_DP_ATTR_MAX,
1230 static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
1231 .name = OVS_DATAPATH_MCGROUP
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 = alloc_percpu(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_portid = nla_get_u32(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(reply, info, &ovs_dp_datapath_multicast_group);
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(reply, info, &ovs_dp_datapath_multicast_group);
1492 static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1494 struct sk_buff *reply;
1495 struct datapath *dp;
1498 reply = ovs_dp_cmd_alloc_info(info);
1503 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1506 goto err_unlock_free;
1508 ovs_dp_change(dp, info->attrs);
1510 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1511 info->snd_seq, 0, OVS_DP_CMD_NEW);
1515 ovs_notify(reply, info, &ovs_dp_datapath_multicast_group);
1524 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1526 struct sk_buff *reply;
1527 struct datapath *dp;
1530 reply = ovs_dp_cmd_alloc_info(info);
1535 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1538 goto err_unlock_free;
1540 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1541 info->snd_seq, 0, OVS_DP_CMD_NEW);
1545 return genlmsg_reply(reply, info);
1553 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1555 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
1556 struct datapath *dp;
1557 int skip = cb->args[0];
1561 list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) {
1563 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
1564 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1565 OVS_DP_CMD_NEW) < 0)
1576 static struct genl_ops dp_datapath_genl_ops[] = {
1577 { .cmd = OVS_DP_CMD_NEW,
1578 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1579 .policy = datapath_policy,
1580 .doit = ovs_dp_cmd_new
1582 { .cmd = OVS_DP_CMD_DEL,
1583 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1584 .policy = datapath_policy,
1585 .doit = ovs_dp_cmd_del
1587 { .cmd = OVS_DP_CMD_GET,
1588 .flags = 0, /* OK for unprivileged users. */
1589 .policy = datapath_policy,
1590 .doit = ovs_dp_cmd_get,
1591 .dumpit = ovs_dp_cmd_dump
1593 { .cmd = OVS_DP_CMD_SET,
1594 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1595 .policy = datapath_policy,
1596 .doit = ovs_dp_cmd_set,
1600 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1601 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1602 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1603 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1604 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1605 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1606 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1609 static struct genl_family dp_vport_genl_family = {
1610 .id = GENL_ID_GENERATE,
1611 .hdrsize = sizeof(struct ovs_header),
1612 .name = OVS_VPORT_FAMILY,
1613 .version = OVS_VPORT_VERSION,
1614 .maxattr = OVS_VPORT_ATTR_MAX,
1619 struct genl_multicast_group ovs_dp_vport_multicast_group = {
1620 .name = OVS_VPORT_MCGROUP
1623 /* Called with ovs_mutex or RCU read lock. */
1624 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
1625 u32 portid, u32 seq, u32 flags, u8 cmd)
1627 struct ovs_header *ovs_header;
1628 struct ovs_vport_stats vport_stats;
1631 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
1636 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1638 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
1639 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
1640 nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) ||
1641 nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid))
1642 goto nla_put_failure;
1644 ovs_vport_get_stats(vport, &vport_stats);
1645 if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
1647 goto nla_put_failure;
1649 err = ovs_vport_get_options(vport, skb);
1650 if (err == -EMSGSIZE)
1653 return genlmsg_end(skb, ovs_header);
1658 genlmsg_cancel(skb, ovs_header);
1662 static struct sk_buff *ovs_vport_cmd_alloc_info(void)
1664 return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1667 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1668 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid,
1671 struct sk_buff *skb;
1674 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1676 return ERR_PTR(-ENOMEM);
1678 retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd);
1684 /* Called with ovs_mutex or RCU read lock. */
1685 static struct vport *lookup_vport(struct net *net,
1686 struct ovs_header *ovs_header,
1687 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1689 struct datapath *dp;
1690 struct vport *vport;
1692 if (a[OVS_VPORT_ATTR_NAME]) {
1693 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
1695 return ERR_PTR(-ENODEV);
1696 if (ovs_header->dp_ifindex &&
1697 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
1698 return ERR_PTR(-ENODEV);
1700 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1701 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1703 if (port_no >= DP_MAX_PORTS)
1704 return ERR_PTR(-EFBIG);
1706 dp = get_dp(net, ovs_header->dp_ifindex);
1708 return ERR_PTR(-ENODEV);
1710 vport = ovs_vport_ovsl_rcu(dp, port_no);
1712 return ERR_PTR(-ENODEV);
1715 return ERR_PTR(-EINVAL);
1718 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1720 struct nlattr **a = info->attrs;
1721 struct ovs_header *ovs_header = info->userhdr;
1722 struct vport_parms parms;
1723 struct sk_buff *reply;
1724 struct vport *vport;
1725 struct datapath *dp;
1729 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1730 !a[OVS_VPORT_ATTR_UPCALL_PID])
1733 port_no = a[OVS_VPORT_ATTR_PORT_NO]
1734 ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0;
1735 if (port_no >= DP_MAX_PORTS)
1738 reply = ovs_vport_cmd_alloc_info();
1743 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1746 goto exit_unlock_free;
1749 vport = ovs_vport_ovsl(dp, port_no);
1752 goto exit_unlock_free;
1754 for (port_no = 1; ; port_no++) {
1755 if (port_no >= DP_MAX_PORTS) {
1757 goto exit_unlock_free;
1759 vport = ovs_vport_ovsl(dp, port_no);
1765 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1766 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1767 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1769 parms.port_no = port_no;
1770 parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1772 vport = new_vport(&parms);
1773 err = PTR_ERR(vport);
1775 goto exit_unlock_free;
1778 if (a[OVS_VPORT_ATTR_STATS])
1779 ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));
1781 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1782 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1786 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
1795 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1797 struct nlattr **a = info->attrs;
1798 struct sk_buff *reply;
1799 struct vport *vport;
1802 reply = ovs_vport_cmd_alloc_info();
1807 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1808 err = PTR_ERR(vport);
1810 goto exit_unlock_free;
1812 if (a[OVS_VPORT_ATTR_TYPE] &&
1813 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
1815 goto exit_unlock_free;
1818 if (a[OVS_VPORT_ATTR_OPTIONS]) {
1819 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
1821 goto exit_unlock_free;
1824 if (a[OVS_VPORT_ATTR_STATS])
1825 ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));
1827 if (a[OVS_VPORT_ATTR_UPCALL_PID])
1828 vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1830 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1831 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1835 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
1844 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1846 struct nlattr **a = info->attrs;
1847 struct sk_buff *reply;
1848 struct vport *vport;
1851 reply = ovs_vport_cmd_alloc_info();
1856 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1857 err = PTR_ERR(vport);
1859 goto exit_unlock_free;
1861 if (vport->port_no == OVSP_LOCAL) {
1863 goto exit_unlock_free;
1866 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1867 info->snd_seq, 0, OVS_VPORT_CMD_DEL);
1869 ovs_dp_detach_port(vport);
1872 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
1881 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1883 struct nlattr **a = info->attrs;
1884 struct ovs_header *ovs_header = info->userhdr;
1885 struct sk_buff *reply;
1886 struct vport *vport;
1889 reply = ovs_vport_cmd_alloc_info();
1894 vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
1895 err = PTR_ERR(vport);
1897 goto exit_unlock_free;
1898 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1899 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1903 return genlmsg_reply(reply, info);
1911 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1913 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1914 struct datapath *dp;
1915 int bucket = cb->args[0], skip = cb->args[1];
1919 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1924 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
1925 struct vport *vport;
1928 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
1930 ovs_vport_cmd_fill_info(vport, skb,
1931 NETLINK_CB(cb->skb).portid,
1934 OVS_VPORT_CMD_NEW) < 0)
1950 static struct genl_ops dp_vport_genl_ops[] = {
1951 { .cmd = OVS_VPORT_CMD_NEW,
1952 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1953 .policy = vport_policy,
1954 .doit = ovs_vport_cmd_new
1956 { .cmd = OVS_VPORT_CMD_DEL,
1957 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1958 .policy = vport_policy,
1959 .doit = ovs_vport_cmd_del
1961 { .cmd = OVS_VPORT_CMD_GET,
1962 .flags = 0, /* OK for unprivileged users. */
1963 .policy = vport_policy,
1964 .doit = ovs_vport_cmd_get,
1965 .dumpit = ovs_vport_cmd_dump
1967 { .cmd = OVS_VPORT_CMD_SET,
1968 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1969 .policy = vport_policy,
1970 .doit = ovs_vport_cmd_set,
1974 struct genl_family_and_ops {
1975 struct genl_family *family;
1976 struct genl_ops *ops;
1978 struct genl_multicast_group *group;
1981 static const struct genl_family_and_ops dp_genl_families[] = {
1982 { &dp_datapath_genl_family,
1983 dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops),
1984 &ovs_dp_datapath_multicast_group },
1985 { &dp_vport_genl_family,
1986 dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops),
1987 &ovs_dp_vport_multicast_group },
1988 { &dp_flow_genl_family,
1989 dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops),
1990 &ovs_dp_flow_multicast_group },
1991 { &dp_packet_genl_family,
1992 dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops),
1996 static void dp_unregister_genl(int n_families)
2000 for (i = 0; i < n_families; i++)
2001 genl_unregister_family(dp_genl_families[i].family);
2004 static int dp_register_genl(void)
2011 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
2012 const struct genl_family_and_ops *f = &dp_genl_families[i];
2014 err = genl_register_family_with_ops(f->family, f->ops,
2021 err = genl_register_mc_group(f->family, f->group);
2030 dp_unregister_genl(n_registered);
2034 static int __net_init ovs_init_net(struct net *net)
2036 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2038 INIT_LIST_HEAD(&ovs_net->dps);
2039 INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
2043 static void __net_exit ovs_exit_net(struct net *net)
2045 struct datapath *dp, *dp_next;
2046 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2049 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
2053 cancel_work_sync(&ovs_net->dp_notify_work);
2056 static struct pernet_operations ovs_net_ops = {
2057 .init = ovs_init_net,
2058 .exit = ovs_exit_net,
2060 .size = sizeof(struct ovs_net),
2063 DEFINE_COMPAT_PNET_REG_FUNC(device);
2065 static int __init dp_init(void)
2069 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
2071 pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n",
2074 err = ovs_flow_init();
2078 err = ovs_vport_init();
2080 goto error_flow_exit;
2082 err = register_pernet_device(&ovs_net_ops);
2084 goto error_vport_exit;
2086 err = register_netdevice_notifier(&ovs_dp_device_notifier);
2088 goto error_netns_exit;
2090 err = dp_register_genl();
2092 goto error_unreg_notifier;
2096 error_unreg_notifier:
2097 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2099 unregister_pernet_device(&ovs_net_ops);
2108 static void dp_cleanup(void)
2110 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
2111 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2112 unregister_pernet_device(&ovs_net_ops);
2118 module_init(dp_init);
2119 module_exit(dp_cleanup);
2121 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2122 MODULE_LICENSE("GPL");
2123 MODULE_VERSION(VERSION);