2 * Copyright (c) 2007-2012 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 <net/genetlink.h>
52 #include <net/net_namespace.h>
53 #include <net/netns/generic.h>
58 #include "genl_exec.h"
61 #include "vport-internal_dev.h"
63 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) || \
64 LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
65 #error Kernels before 2.6.18 or after 3.7 are not supported by this version of Open vSwitch.
68 #define REHASH_FLOW_INTERVAL (10 * 60 * HZ)
69 static void rehash_flow_table(struct work_struct *work);
70 static DECLARE_DELAYED_WORK(rehash_flow_wq, rehash_flow_table);
72 int ovs_net_id __read_mostly;
77 * Writes to device state (add/remove datapath, port, set operations on vports,
78 * etc.) are protected by RTNL.
80 * Writes to other state (flow table modifications, set miscellaneous datapath
81 * parameters, etc.) are protected by genl_mutex. The RTNL lock nests inside
84 * Reads are protected by RCU.
86 * There are a few special cases (mostly stats) that have their own
87 * synchronization but they nest under all of above and don't interact with
91 static struct vport *new_vport(const struct vport_parms *);
92 static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *,
93 const struct dp_upcall_info *);
94 static int queue_userspace_packet(struct net *, int dp_ifindex,
96 const struct dp_upcall_info *);
98 /* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */
99 static struct datapath *get_dp(struct net *net, int dp_ifindex)
101 struct datapath *dp = NULL;
102 struct net_device *dev;
105 dev = dev_get_by_index_rcu(net, dp_ifindex);
107 struct vport *vport = ovs_internal_dev_get_vport(dev);
116 /* Must be called with rcu_read_lock or RTNL lock. */
117 const char *ovs_dp_name(const struct datapath *dp)
119 struct vport *vport = ovs_vport_rtnl_rcu(dp, OVSP_LOCAL);
120 return vport->ops->get_name(vport);
123 static int get_dpifindex(struct datapath *dp)
130 local = ovs_vport_rcu(dp, OVSP_LOCAL);
132 ifindex = local->ops->get_ifindex(local);
141 static void destroy_dp_rcu(struct rcu_head *rcu)
143 struct datapath *dp = container_of(rcu, struct datapath, rcu);
145 ovs_flow_tbl_destroy((__force struct flow_table *)dp->table);
146 free_percpu(dp->stats_percpu);
147 release_net(ovs_dp_get_net(dp));
152 static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
155 return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
158 struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
161 struct hlist_node *n;
162 struct hlist_head *head;
164 head = vport_hash_bucket(dp, port_no);
165 hlist_for_each_entry_rcu(vport, n, head, dp_hash_node) {
166 if (vport->port_no == port_no)
172 /* Called with RTNL lock and genl_lock. */
173 static struct vport *new_vport(const struct vport_parms *parms)
177 vport = ovs_vport_add(parms);
178 if (!IS_ERR(vport)) {
179 struct datapath *dp = parms->dp;
180 struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
182 hlist_add_head_rcu(&vport->dp_hash_node, head);
187 /* Called with RTNL lock. */
188 void ovs_dp_detach_port(struct vport *p)
192 /* First drop references to device. */
193 hlist_del_rcu(&p->dp_hash_node);
195 /* Then destroy it. */
199 /* Must be called with rcu_read_lock. */
200 void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb)
202 struct datapath *dp = p->dp;
203 struct sw_flow *flow;
204 struct dp_stats_percpu *stats;
208 stats = this_cpu_ptr(dp->stats_percpu);
210 if (!OVS_CB(skb)->flow) {
211 struct sw_flow_key key;
214 /* Extract flow from 'skb' into 'key'. */
215 error = ovs_flow_extract(skb, p->port_no, &key, &key_len);
216 if (unlikely(error)) {
222 flow = ovs_flow_tbl_lookup(rcu_dereference(dp->table),
224 if (unlikely(!flow)) {
225 struct dp_upcall_info upcall;
227 upcall.cmd = OVS_PACKET_CMD_MISS;
229 upcall.userdata = NULL;
230 upcall.portid = p->upcall_portid;
231 ovs_dp_upcall(dp, skb, &upcall);
233 stats_counter = &stats->n_missed;
237 OVS_CB(skb)->flow = flow;
240 stats_counter = &stats->n_hit;
241 ovs_flow_used(OVS_CB(skb)->flow, skb);
242 ovs_execute_actions(dp, skb);
245 /* Update datapath statistics. */
246 u64_stats_update_begin(&stats->sync);
248 u64_stats_update_end(&stats->sync);
251 static struct genl_family dp_packet_genl_family = {
252 .id = GENL_ID_GENERATE,
253 .hdrsize = sizeof(struct ovs_header),
254 .name = OVS_PACKET_FAMILY,
255 .version = OVS_PACKET_VERSION,
256 .maxattr = OVS_PACKET_ATTR_MAX,
260 int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
261 const struct dp_upcall_info *upcall_info)
263 struct dp_stats_percpu *stats;
267 if (upcall_info->portid == 0) {
272 dp_ifindex = get_dpifindex(dp);
278 forward_ip_summed(skb, true);
280 if (!skb_is_gso(skb))
281 err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info);
283 err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info);
290 stats = this_cpu_ptr(dp->stats_percpu);
292 u64_stats_update_begin(&stats->sync);
294 u64_stats_update_end(&stats->sync);
299 static int queue_gso_packets(struct net *net, int dp_ifindex,
301 const struct dp_upcall_info *upcall_info)
303 unsigned short gso_type = skb_shinfo(skb)->gso_type;
304 struct dp_upcall_info later_info;
305 struct sw_flow_key later_key;
306 struct sk_buff *segs, *nskb;
309 segs = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM);
311 return PTR_ERR(segs);
313 /* Queue all of the segments. */
316 err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info);
320 if (skb == segs && gso_type & SKB_GSO_UDP) {
321 /* The initial flow key extracted by ovs_flow_extract()
322 * in this case is for a first fragment, so we need to
323 * properly mark later fragments.
325 later_key = *upcall_info->key;
326 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
328 later_info = *upcall_info;
329 later_info.key = &later_key;
330 upcall_info = &later_info;
332 } while ((skb = skb->next));
334 /* Free all of the segments. */
342 } while ((skb = nskb));
346 static int queue_userspace_packet(struct net *net, int dp_ifindex,
348 const struct dp_upcall_info *upcall_info)
350 struct ovs_header *upcall;
351 struct sk_buff *nskb = NULL;
352 struct sk_buff *user_skb; /* to be queued to userspace */
357 if (vlan_tx_tag_present(skb)) {
358 nskb = skb_clone(skb, GFP_ATOMIC);
362 err = vlan_deaccel_tag(nskb);
369 if (nla_attr_size(skb->len) > USHRT_MAX) {
374 len = sizeof(struct ovs_header);
375 len += nla_total_size(skb->len);
376 len += nla_total_size(FLOW_BUFSIZE);
377 if (upcall_info->cmd == OVS_PACKET_CMD_ACTION)
378 len += nla_total_size(8);
380 user_skb = genlmsg_new(len, GFP_ATOMIC);
386 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
387 0, upcall_info->cmd);
388 upcall->dp_ifindex = dp_ifindex;
390 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
391 ovs_flow_to_nlattrs(upcall_info->key, user_skb);
392 nla_nest_end(user_skb, nla);
394 if (upcall_info->userdata)
395 nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA,
396 nla_get_u64(upcall_info->userdata));
398 nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len);
400 skb_copy_and_csum_dev(skb, nla_data(nla));
402 err = genlmsg_unicast(net, user_skb, upcall_info->portid);
409 /* Called with genl_mutex. */
410 static int flush_flows(struct datapath *dp)
412 struct flow_table *old_table;
413 struct flow_table *new_table;
415 old_table = genl_dereference(dp->table);
416 new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS);
420 rcu_assign_pointer(dp->table, new_table);
422 ovs_flow_tbl_deferred_destroy(old_table);
426 static int validate_actions(const struct nlattr *attr,
427 const struct sw_flow_key *key, int depth);
429 static int validate_sample(const struct nlattr *attr,
430 const struct sw_flow_key *key, int depth)
432 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
433 const struct nlattr *probability, *actions;
434 const struct nlattr *a;
437 memset(attrs, 0, sizeof(attrs));
438 nla_for_each_nested(a, attr, rem) {
439 int type = nla_type(a);
440 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
447 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
448 if (!probability || nla_len(probability) != sizeof(u32))
451 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
452 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
454 return validate_actions(actions, key, depth + 1);
457 static int validate_tp_port(const struct sw_flow_key *flow_key)
459 if (flow_key->eth.type == htons(ETH_P_IP)) {
460 if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst)
462 } else if (flow_key->eth.type == htons(ETH_P_IPV6)) {
463 if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst)
470 static int validate_set(const struct nlattr *a,
471 const struct sw_flow_key *flow_key)
473 const struct nlattr *ovs_key = nla_data(a);
474 int key_type = nla_type(ovs_key);
476 /* There can be only one key in a action */
477 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
480 if (key_type > OVS_KEY_ATTR_MAX ||
481 nla_len(ovs_key) != ovs_key_lens[key_type])
485 const struct ovs_key_ipv4 *ipv4_key;
486 const struct ovs_key_ipv4_tunnel *tun_key;
487 const struct ovs_key_ipv6 *ipv6_key;
489 case OVS_KEY_ATTR_PRIORITY:
490 case OVS_KEY_ATTR_TUN_ID:
491 case OVS_KEY_ATTR_ETHERNET:
494 case OVS_KEY_ATTR_SKB_MARK:
495 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER)
496 if (nla_get_u32(ovs_key) != 0)
501 case OVS_KEY_ATTR_IPV4_TUNNEL:
502 tun_key = nla_data(ovs_key);
503 if (!tun_key->ipv4_dst)
507 case OVS_KEY_ATTR_IPV4:
508 if (flow_key->eth.type != htons(ETH_P_IP))
511 if (!flow_key->ip.proto)
514 ipv4_key = nla_data(ovs_key);
515 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
518 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
523 case OVS_KEY_ATTR_IPV6:
524 if (flow_key->eth.type != htons(ETH_P_IPV6))
527 if (!flow_key->ip.proto)
530 ipv6_key = nla_data(ovs_key);
531 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
534 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
537 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
542 case OVS_KEY_ATTR_TCP:
543 if (flow_key->ip.proto != IPPROTO_TCP)
546 return validate_tp_port(flow_key);
548 case OVS_KEY_ATTR_UDP:
549 if (flow_key->ip.proto != IPPROTO_UDP)
552 return validate_tp_port(flow_key);
561 static int validate_userspace(const struct nlattr *attr)
563 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
564 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
565 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_U64 },
567 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
570 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
571 attr, userspace_policy);
575 if (!a[OVS_USERSPACE_ATTR_PID] ||
576 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
582 static int validate_actions(const struct nlattr *attr,
583 const struct sw_flow_key *key, int depth)
585 const struct nlattr *a;
588 if (depth >= SAMPLE_ACTION_DEPTH)
591 nla_for_each_nested(a, attr, rem) {
592 /* Expected argument lengths, (u32)-1 for variable length. */
593 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
594 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
595 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
596 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
597 [OVS_ACTION_ATTR_POP_VLAN] = 0,
598 [OVS_ACTION_ATTR_SET] = (u32)-1,
599 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1
601 const struct ovs_action_push_vlan *vlan;
602 int type = nla_type(a);
604 if (type > OVS_ACTION_ATTR_MAX ||
605 (action_lens[type] != nla_len(a) &&
606 action_lens[type] != (u32)-1))
610 case OVS_ACTION_ATTR_UNSPEC:
613 case OVS_ACTION_ATTR_USERSPACE:
614 err = validate_userspace(a);
619 case OVS_ACTION_ATTR_OUTPUT:
620 if (nla_get_u32(a) >= DP_MAX_PORTS)
625 case OVS_ACTION_ATTR_POP_VLAN:
628 case OVS_ACTION_ATTR_PUSH_VLAN:
630 if (vlan->vlan_tpid != htons(ETH_P_8021Q))
632 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
636 case OVS_ACTION_ATTR_SET:
637 err = validate_set(a, key);
642 case OVS_ACTION_ATTR_SAMPLE:
643 err = validate_sample(a, key, depth);
659 static void clear_stats(struct sw_flow *flow)
663 flow->packet_count = 0;
664 flow->byte_count = 0;
667 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
669 struct ovs_header *ovs_header = info->userhdr;
670 struct nlattr **a = info->attrs;
671 struct sw_flow_actions *acts;
672 struct sk_buff *packet;
673 struct sw_flow *flow;
681 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
682 !a[OVS_PACKET_ATTR_ACTIONS] ||
683 nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN)
686 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
687 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
691 skb_reserve(packet, NET_IP_ALIGN);
693 memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len);
695 skb_reset_mac_header(packet);
696 eth = eth_hdr(packet);
698 /* Normally, setting the skb 'protocol' field would be handled by a
699 * call to eth_type_trans(), but it assumes there's a sending
700 * device, which we may not have. */
701 if (ntohs(eth->h_proto) >= 1536)
702 packet->protocol = eth->h_proto;
704 packet->protocol = htons(ETH_P_802_2);
706 /* Build an sw_flow for sending this packet. */
707 flow = ovs_flow_alloc();
712 err = ovs_flow_extract(packet, -1, &flow->key, &key_len);
716 err = ovs_flow_metadata_from_nlattrs(flow, key_len, a[OVS_PACKET_ATTR_KEY]);
720 err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0);
724 acts = ovs_flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]);
728 rcu_assign_pointer(flow->sf_acts, acts);
730 OVS_CB(packet)->flow = flow;
731 packet->priority = flow->key.phy.priority;
732 skb_set_mark(packet, flow->key.phy.skb_mark);
735 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
741 err = ovs_execute_actions(dp, packet);
758 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
759 [OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC },
760 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
761 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
764 static struct genl_ops dp_packet_genl_ops[] = {
765 { .cmd = OVS_PACKET_CMD_EXECUTE,
766 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
767 .policy = packet_policy,
768 .doit = ovs_packet_cmd_execute
772 static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats)
775 struct flow_table *table = genl_dereference(dp->table);
777 stats->n_flows = ovs_flow_tbl_count(table);
779 stats->n_hit = stats->n_missed = stats->n_lost = 0;
780 for_each_possible_cpu(i) {
781 const struct dp_stats_percpu *percpu_stats;
782 struct dp_stats_percpu local_stats;
785 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
788 start = u64_stats_fetch_begin_bh(&percpu_stats->sync);
789 local_stats = *percpu_stats;
790 } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start));
792 stats->n_hit += local_stats.n_hit;
793 stats->n_missed += local_stats.n_missed;
794 stats->n_lost += local_stats.n_lost;
798 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
799 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
800 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
801 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
804 static struct genl_family dp_flow_genl_family = {
805 .id = GENL_ID_GENERATE,
806 .hdrsize = sizeof(struct ovs_header),
807 .name = OVS_FLOW_FAMILY,
808 .version = OVS_FLOW_VERSION,
809 .maxattr = OVS_FLOW_ATTR_MAX,
813 static struct genl_multicast_group ovs_dp_flow_multicast_group = {
814 .name = OVS_FLOW_MCGROUP
817 /* Called with genl_lock. */
818 static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
819 struct sk_buff *skb, u32 portid,
820 u32 seq, u32 flags, u8 cmd)
822 const int skb_orig_len = skb->len;
823 const struct sw_flow_actions *sf_acts;
824 struct ovs_flow_stats stats;
825 struct ovs_header *ovs_header;
831 sf_acts = rcu_dereference_protected(flow->sf_acts,
832 lockdep_genl_is_held());
834 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd);
838 ovs_header->dp_ifindex = get_dpifindex(dp);
840 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
842 goto nla_put_failure;
843 err = ovs_flow_to_nlattrs(&flow->key, skb);
846 nla_nest_end(skb, nla);
848 spin_lock_bh(&flow->lock);
850 stats.n_packets = flow->packet_count;
851 stats.n_bytes = flow->byte_count;
852 tcp_flags = flow->tcp_flags;
853 spin_unlock_bh(&flow->lock);
856 nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used)))
857 goto nla_put_failure;
859 if (stats.n_packets &&
860 nla_put(skb, OVS_FLOW_ATTR_STATS,
861 sizeof(struct ovs_flow_stats), &stats))
862 goto nla_put_failure;
865 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags))
866 goto nla_put_failure;
868 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
869 * this is the first flow to be dumped into 'skb'. This is unusual for
870 * Netlink but individual action lists can be longer than
871 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
872 * The userspace caller can always fetch the actions separately if it
873 * really wants them. (Most userspace callers in fact don't care.)
875 * This can only fail for dump operations because the skb is always
876 * properly sized for single flows.
878 err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len,
880 if (err < 0 && skb_orig_len)
883 return genlmsg_end(skb, ovs_header);
888 genlmsg_cancel(skb, ovs_header);
892 static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow)
894 const struct sw_flow_actions *sf_acts;
897 sf_acts = rcu_dereference_protected(flow->sf_acts,
898 lockdep_genl_is_held());
900 /* OVS_FLOW_ATTR_KEY */
901 len = nla_total_size(FLOW_BUFSIZE);
902 /* OVS_FLOW_ATTR_ACTIONS */
903 len += nla_total_size(sf_acts->actions_len);
904 /* OVS_FLOW_ATTR_STATS */
905 len += nla_total_size(sizeof(struct ovs_flow_stats));
906 /* OVS_FLOW_ATTR_TCP_FLAGS */
907 len += nla_total_size(1);
908 /* OVS_FLOW_ATTR_USED */
909 len += nla_total_size(8);
911 len += NLMSG_ALIGN(sizeof(struct ovs_header));
913 return genlmsg_new(len, GFP_KERNEL);
916 static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow,
918 u32 portid, u32 seq, u8 cmd)
923 skb = ovs_flow_cmd_alloc_info(flow);
925 return ERR_PTR(-ENOMEM);
927 retval = ovs_flow_cmd_fill_info(flow, dp, skb, portid, seq, 0, cmd);
932 static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
934 struct nlattr **a = info->attrs;
935 struct ovs_header *ovs_header = info->userhdr;
936 struct sw_flow_key key;
937 struct sw_flow *flow;
938 struct sk_buff *reply;
940 struct flow_table *table;
946 if (!a[OVS_FLOW_ATTR_KEY])
948 error = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
952 /* Validate actions. */
953 if (a[OVS_FLOW_ATTR_ACTIONS]) {
954 error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0);
957 } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) {
962 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
967 table = genl_dereference(dp->table);
968 flow = ovs_flow_tbl_lookup(table, &key, key_len);
970 struct sw_flow_actions *acts;
972 /* Bail out if we're not allowed to create a new flow. */
974 if (info->genlhdr->cmd == OVS_FLOW_CMD_SET)
977 /* Expand table, if necessary, to make room. */
978 if (ovs_flow_tbl_need_to_expand(table)) {
979 struct flow_table *new_table;
981 new_table = ovs_flow_tbl_expand(table);
982 if (!IS_ERR(new_table)) {
983 rcu_assign_pointer(dp->table, new_table);
984 ovs_flow_tbl_deferred_destroy(table);
985 table = genl_dereference(dp->table);
990 flow = ovs_flow_alloc();
992 error = PTR_ERR(flow);
997 /* Obtain actions. */
998 acts = ovs_flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]);
999 error = PTR_ERR(acts);
1001 goto error_free_flow;
1002 rcu_assign_pointer(flow->sf_acts, acts);
1004 /* Put flow in bucket. */
1005 ovs_flow_tbl_insert(table, flow, &key, key_len);
1007 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
1011 /* We found a matching flow. */
1012 struct sw_flow_actions *old_acts;
1013 struct nlattr *acts_attrs;
1015 /* Bail out if we're not allowed to modify an existing flow.
1016 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1017 * because Generic Netlink treats the latter as a dump
1018 * request. We also accept NLM_F_EXCL in case that bug ever
1022 if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW &&
1023 info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL))
1026 /* Update actions. */
1027 old_acts = rcu_dereference_protected(flow->sf_acts,
1028 lockdep_genl_is_held());
1029 acts_attrs = a[OVS_FLOW_ATTR_ACTIONS];
1031 (old_acts->actions_len != nla_len(acts_attrs) ||
1032 memcmp(old_acts->actions, nla_data(acts_attrs),
1033 old_acts->actions_len))) {
1034 struct sw_flow_actions *new_acts;
1036 new_acts = ovs_flow_actions_alloc(acts_attrs);
1037 error = PTR_ERR(new_acts);
1038 if (IS_ERR(new_acts))
1041 rcu_assign_pointer(flow->sf_acts, new_acts);
1042 ovs_flow_deferred_free_acts(old_acts);
1045 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
1046 info->snd_seq, OVS_FLOW_CMD_NEW);
1049 if (a[OVS_FLOW_ATTR_CLEAR]) {
1050 spin_lock_bh(&flow->lock);
1052 spin_unlock_bh(&flow->lock);
1057 genl_notify(reply, genl_info_net(info), info->snd_portid,
1058 ovs_dp_flow_multicast_group.id, info->nlhdr,
1061 netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0,
1062 ovs_dp_flow_multicast_group.id, PTR_ERR(reply));
1066 ovs_flow_free(flow);
1071 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
1073 struct nlattr **a = info->attrs;
1074 struct ovs_header *ovs_header = info->userhdr;
1075 struct sw_flow_key key;
1076 struct sk_buff *reply;
1077 struct sw_flow *flow;
1078 struct datapath *dp;
1079 struct flow_table *table;
1083 if (!a[OVS_FLOW_ATTR_KEY])
1085 err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
1089 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1093 table = genl_dereference(dp->table);
1094 flow = ovs_flow_tbl_lookup(table, &key, key_len);
1098 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
1099 info->snd_seq, OVS_FLOW_CMD_NEW);
1101 return PTR_ERR(reply);
1103 return genlmsg_reply(reply, info);
1106 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
1108 struct nlattr **a = info->attrs;
1109 struct ovs_header *ovs_header = info->userhdr;
1110 struct sw_flow_key key;
1111 struct sk_buff *reply;
1112 struct sw_flow *flow;
1113 struct datapath *dp;
1114 struct flow_table *table;
1118 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1122 if (!a[OVS_FLOW_ATTR_KEY])
1123 return flush_flows(dp);
1125 err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
1129 table = genl_dereference(dp->table);
1130 flow = ovs_flow_tbl_lookup(table, &key, key_len);
1134 reply = ovs_flow_cmd_alloc_info(flow);
1138 ovs_flow_tbl_remove(table, flow);
1140 err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid,
1141 info->snd_seq, 0, OVS_FLOW_CMD_DEL);
1144 ovs_flow_deferred_free(flow);
1146 genl_notify(reply, genl_info_net(info), info->snd_portid,
1147 ovs_dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL);
1151 static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1153 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1154 struct datapath *dp;
1155 struct flow_table *table;
1157 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1161 table = genl_dereference(dp->table);
1164 struct sw_flow *flow;
1167 bucket = cb->args[0];
1169 flow = ovs_flow_tbl_next(table, &bucket, &obj);
1173 if (ovs_flow_cmd_fill_info(flow, dp, skb,
1174 NETLINK_CB(cb->skb).portid,
1175 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1176 OVS_FLOW_CMD_NEW) < 0)
1179 cb->args[0] = bucket;
1185 static struct genl_ops dp_flow_genl_ops[] = {
1186 { .cmd = OVS_FLOW_CMD_NEW,
1187 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1188 .policy = flow_policy,
1189 .doit = ovs_flow_cmd_new_or_set
1191 { .cmd = OVS_FLOW_CMD_DEL,
1192 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1193 .policy = flow_policy,
1194 .doit = ovs_flow_cmd_del
1196 { .cmd = OVS_FLOW_CMD_GET,
1197 .flags = 0, /* OK for unprivileged users. */
1198 .policy = flow_policy,
1199 .doit = ovs_flow_cmd_get,
1200 .dumpit = ovs_flow_cmd_dump
1202 { .cmd = OVS_FLOW_CMD_SET,
1203 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1204 .policy = flow_policy,
1205 .doit = ovs_flow_cmd_new_or_set,
1209 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1210 #ifdef HAVE_NLA_NUL_STRING
1211 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1213 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1216 static struct genl_family dp_datapath_genl_family = {
1217 .id = GENL_ID_GENERATE,
1218 .hdrsize = sizeof(struct ovs_header),
1219 .name = OVS_DATAPATH_FAMILY,
1220 .version = OVS_DATAPATH_VERSION,
1221 .maxattr = OVS_DP_ATTR_MAX,
1225 static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
1226 .name = OVS_DATAPATH_MCGROUP
1229 static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
1230 u32 portid, u32 seq, u32 flags, u8 cmd)
1232 struct ovs_header *ovs_header;
1233 struct ovs_dp_stats dp_stats;
1236 ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
1241 ovs_header->dp_ifindex = get_dpifindex(dp);
1244 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
1247 goto nla_put_failure;
1249 get_dp_stats(dp, &dp_stats);
1250 if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats))
1251 goto nla_put_failure;
1253 return genlmsg_end(skb, ovs_header);
1256 genlmsg_cancel(skb, ovs_header);
1261 static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 portid,
1264 struct sk_buff *skb;
1267 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1269 return ERR_PTR(-ENOMEM);
1271 retval = ovs_dp_cmd_fill_info(dp, skb, portid, seq, 0, cmd);
1274 return ERR_PTR(retval);
1279 static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1281 return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1);
1284 /* Called with genl_mutex and optionally with RTNL lock also. */
1285 static struct datapath *lookup_datapath(struct net *net,
1286 struct ovs_header *ovs_header,
1287 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1289 struct datapath *dp;
1291 if (!a[OVS_DP_ATTR_NAME])
1292 dp = get_dp(net, ovs_header->dp_ifindex);
1294 struct vport *vport;
1297 vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
1298 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1301 return dp ? dp : ERR_PTR(-ENODEV);
1304 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1306 struct nlattr **a = info->attrs;
1307 struct vport_parms parms;
1308 struct sk_buff *reply;
1309 struct datapath *dp;
1310 struct vport *vport;
1311 struct ovs_net *ovs_net;
1315 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1318 err = ovs_dp_cmd_validate(a);
1325 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1327 goto err_unlock_rtnl;
1329 ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
1331 /* Allocate table. */
1333 rcu_assign_pointer(dp->table, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS));
1337 dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
1338 if (!dp->stats_percpu) {
1340 goto err_destroy_table;
1343 dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
1347 goto err_destroy_percpu;
1350 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
1351 INIT_HLIST_HEAD(&dp->ports[i]);
1353 /* Set up our datapath device. */
1354 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1355 parms.type = OVS_VPORT_TYPE_INTERNAL;
1356 parms.options = NULL;
1358 parms.port_no = OVSP_LOCAL;
1359 parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]);
1361 vport = new_vport(&parms);
1362 if (IS_ERR(vport)) {
1363 err = PTR_ERR(vport);
1367 goto err_destroy_ports_array;
1370 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
1371 info->snd_seq, OVS_DP_CMD_NEW);
1372 err = PTR_ERR(reply);
1374 goto err_destroy_local_port;
1376 ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
1377 list_add_tail(&dp->list_node, &ovs_net->dps);
1381 genl_notify(reply, genl_info_net(info), info->snd_portid,
1382 ovs_dp_datapath_multicast_group.id, info->nlhdr,
1386 err_destroy_local_port:
1387 ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL));
1388 err_destroy_ports_array:
1391 free_percpu(dp->stats_percpu);
1393 ovs_flow_tbl_destroy(genl_dereference(dp->table));
1395 release_net(ovs_dp_get_net(dp));
1403 /* Called with genl_mutex. */
1404 static void __dp_destroy(struct datapath *dp)
1410 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
1411 struct vport *vport;
1412 struct hlist_node *node, *n;
1414 hlist_for_each_entry_safe(vport, node, n, &dp->ports[i], dp_hash_node)
1415 if (vport->port_no != OVSP_LOCAL)
1416 ovs_dp_detach_port(vport);
1419 list_del(&dp->list_node);
1420 ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL));
1422 /* rtnl_unlock() will wait until all the references to devices that
1423 * are pending unregistration have been dropped. We do it here to
1424 * ensure that any internal devices (which contain DP pointers) are
1425 * fully destroyed before freeing the datapath.
1429 call_rcu(&dp->rcu, destroy_dp_rcu);
1432 static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1434 struct sk_buff *reply;
1435 struct datapath *dp;
1438 err = ovs_dp_cmd_validate(info->attrs);
1442 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1447 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
1448 info->snd_seq, OVS_DP_CMD_DEL);
1449 err = PTR_ERR(reply);
1455 genl_notify(reply, genl_info_net(info), info->snd_portid,
1456 ovs_dp_datapath_multicast_group.id, info->nlhdr,
1462 static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1464 struct sk_buff *reply;
1465 struct datapath *dp;
1468 err = ovs_dp_cmd_validate(info->attrs);
1472 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1476 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
1477 info->snd_seq, OVS_DP_CMD_NEW);
1478 if (IS_ERR(reply)) {
1479 err = PTR_ERR(reply);
1480 netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0,
1481 ovs_dp_datapath_multicast_group.id, err);
1485 genl_notify(reply, genl_info_net(info), info->snd_portid,
1486 ovs_dp_datapath_multicast_group.id, info->nlhdr,
1492 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1494 struct sk_buff *reply;
1495 struct datapath *dp;
1498 err = ovs_dp_cmd_validate(info->attrs);
1502 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1506 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
1507 info->snd_seq, OVS_DP_CMD_NEW);
1509 return PTR_ERR(reply);
1511 return genlmsg_reply(reply, info);
1514 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1516 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
1517 struct datapath *dp;
1518 int skip = cb->args[0];
1521 list_for_each_entry(dp, &ovs_net->dps, list_node) {
1523 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
1524 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1525 OVS_DP_CMD_NEW) < 0)
1535 static struct genl_ops dp_datapath_genl_ops[] = {
1536 { .cmd = OVS_DP_CMD_NEW,
1537 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1538 .policy = datapath_policy,
1539 .doit = ovs_dp_cmd_new
1541 { .cmd = OVS_DP_CMD_DEL,
1542 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1543 .policy = datapath_policy,
1544 .doit = ovs_dp_cmd_del
1546 { .cmd = OVS_DP_CMD_GET,
1547 .flags = 0, /* OK for unprivileged users. */
1548 .policy = datapath_policy,
1549 .doit = ovs_dp_cmd_get,
1550 .dumpit = ovs_dp_cmd_dump
1552 { .cmd = OVS_DP_CMD_SET,
1553 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1554 .policy = datapath_policy,
1555 .doit = ovs_dp_cmd_set,
1559 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1560 #ifdef HAVE_NLA_NUL_STRING
1561 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1562 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1563 [OVS_VPORT_ATTR_ADDRESS] = { .len = ETH_ALEN },
1565 [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) },
1566 [OVS_VPORT_ATTR_ADDRESS] = { .minlen = ETH_ALEN },
1568 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1569 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1570 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1571 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1574 static struct genl_family dp_vport_genl_family = {
1575 .id = GENL_ID_GENERATE,
1576 .hdrsize = sizeof(struct ovs_header),
1577 .name = OVS_VPORT_FAMILY,
1578 .version = OVS_VPORT_VERSION,
1579 .maxattr = OVS_VPORT_ATTR_MAX,
1583 struct genl_multicast_group ovs_dp_vport_multicast_group = {
1584 .name = OVS_VPORT_MCGROUP
1587 /* Called with RTNL lock or RCU read lock. */
1588 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
1589 u32 portid, u32 seq, u32 flags, u8 cmd)
1591 struct ovs_header *ovs_header;
1592 struct ovs_vport_stats vport_stats;
1595 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
1600 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1602 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
1603 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
1604 nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) ||
1605 nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid))
1606 goto nla_put_failure;
1608 ovs_vport_get_stats(vport, &vport_stats);
1609 if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
1611 goto nla_put_failure;
1613 if (nla_put(skb, OVS_VPORT_ATTR_ADDRESS, ETH_ALEN,
1614 vport->ops->get_addr(vport)))
1615 goto nla_put_failure;
1617 err = ovs_vport_get_options(vport, skb);
1618 if (err == -EMSGSIZE)
1621 return genlmsg_end(skb, ovs_header);
1626 genlmsg_cancel(skb, ovs_header);
1630 /* Called with RTNL lock or RCU read lock. */
1631 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid,
1634 struct sk_buff *skb;
1637 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1639 return ERR_PTR(-ENOMEM);
1641 retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd);
1644 return ERR_PTR(retval);
1649 static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1651 return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1);
1654 /* Called with RTNL lock or RCU read lock. */
1655 static struct vport *lookup_vport(struct net *net,
1656 struct ovs_header *ovs_header,
1657 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1659 struct datapath *dp;
1660 struct vport *vport;
1662 if (a[OVS_VPORT_ATTR_NAME]) {
1663 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
1665 return ERR_PTR(-ENODEV);
1666 if (ovs_header->dp_ifindex &&
1667 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
1668 return ERR_PTR(-ENODEV);
1670 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1671 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1673 if (port_no >= DP_MAX_PORTS)
1674 return ERR_PTR(-EFBIG);
1676 dp = get_dp(net, ovs_header->dp_ifindex);
1678 return ERR_PTR(-ENODEV);
1680 vport = ovs_vport_rtnl_rcu(dp, port_no);
1682 return ERR_PTR(-ENOENT);
1685 return ERR_PTR(-EINVAL);
1688 /* Called with RTNL lock. */
1689 static int change_vport(struct vport *vport,
1690 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1694 if (a[OVS_VPORT_ATTR_STATS])
1695 ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));
1697 if (a[OVS_VPORT_ATTR_ADDRESS])
1698 err = ovs_vport_set_addr(vport, nla_data(a[OVS_VPORT_ATTR_ADDRESS]));
1703 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1705 struct nlattr **a = info->attrs;
1706 struct ovs_header *ovs_header = info->userhdr;
1707 struct vport_parms parms;
1708 struct sk_buff *reply;
1709 struct vport *vport;
1710 struct datapath *dp;
1715 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1716 !a[OVS_VPORT_ATTR_UPCALL_PID])
1719 err = ovs_vport_cmd_validate(a);
1724 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1729 if (a[OVS_VPORT_ATTR_PORT_NO]) {
1730 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1733 if (port_no >= DP_MAX_PORTS)
1736 vport = ovs_vport_rtnl(dp, port_no);
1741 for (port_no = 1; ; port_no++) {
1742 if (port_no >= DP_MAX_PORTS) {
1746 vport = ovs_vport_rtnl(dp, port_no);
1752 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1753 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1754 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1756 parms.port_no = port_no;
1757 parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1759 vport = new_vport(&parms);
1760 err = PTR_ERR(vport);
1764 err = change_vport(vport, a);
1766 reply = ovs_vport_cmd_build_info(vport, info->snd_portid,
1770 err = PTR_ERR(reply);
1773 ovs_dp_detach_port(vport);
1776 genl_notify(reply, genl_info_net(info), info->snd_portid,
1777 ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1785 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1787 struct nlattr **a = info->attrs;
1788 struct sk_buff *reply;
1789 struct vport *vport;
1792 err = ovs_vport_cmd_validate(a);
1797 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1798 err = PTR_ERR(vport);
1803 if (a[OVS_VPORT_ATTR_TYPE] &&
1804 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type)
1807 if (!err && a[OVS_VPORT_ATTR_OPTIONS])
1808 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
1810 err = change_vport(vport, a);
1813 if (!err && a[OVS_VPORT_ATTR_UPCALL_PID])
1814 vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1816 reply = ovs_vport_cmd_build_info(vport, info->snd_portid,
1817 info->snd_seq, OVS_VPORT_CMD_NEW);
1818 if (IS_ERR(reply)) {
1819 netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0,
1820 ovs_dp_vport_multicast_group.id, PTR_ERR(reply));
1824 genl_notify(reply, genl_info_net(info), info->snd_portid,
1825 ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1833 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1835 struct nlattr **a = info->attrs;
1836 struct sk_buff *reply;
1837 struct vport *vport;
1840 err = ovs_vport_cmd_validate(a);
1845 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
1846 err = PTR_ERR(vport);
1850 if (vport->port_no == OVSP_LOCAL) {
1855 reply = ovs_vport_cmd_build_info(vport, info->snd_portid,
1856 info->snd_seq, OVS_VPORT_CMD_DEL);
1857 err = PTR_ERR(reply);
1861 ovs_dp_detach_port(vport);
1863 genl_notify(reply, genl_info_net(info), info->snd_portid,
1864 ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1872 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1874 struct nlattr **a = info->attrs;
1875 struct ovs_header *ovs_header = info->userhdr;
1876 struct sk_buff *reply;
1877 struct vport *vport;
1880 err = ovs_vport_cmd_validate(a);
1885 vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
1886 err = PTR_ERR(vport);
1890 reply = ovs_vport_cmd_build_info(vport, info->snd_portid,
1891 info->snd_seq, OVS_VPORT_CMD_NEW);
1892 err = PTR_ERR(reply);
1898 return genlmsg_reply(reply, info);
1906 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1908 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1909 struct datapath *dp;
1910 int bucket = cb->args[0], skip = cb->args[1];
1913 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1918 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
1919 struct vport *vport;
1920 struct hlist_node *n;
1923 hlist_for_each_entry_rcu(vport, n, &dp->ports[i], dp_hash_node) {
1925 ovs_vport_cmd_fill_info(vport, skb,
1926 NETLINK_CB(cb->skb).portid,
1929 OVS_VPORT_CMD_NEW) < 0)
1945 static struct genl_ops dp_vport_genl_ops[] = {
1946 { .cmd = OVS_VPORT_CMD_NEW,
1947 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1948 .policy = vport_policy,
1949 .doit = ovs_vport_cmd_new
1951 { .cmd = OVS_VPORT_CMD_DEL,
1952 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1953 .policy = vport_policy,
1954 .doit = ovs_vport_cmd_del
1956 { .cmd = OVS_VPORT_CMD_GET,
1957 .flags = 0, /* OK for unprivileged users. */
1958 .policy = vport_policy,
1959 .doit = ovs_vport_cmd_get,
1960 .dumpit = ovs_vport_cmd_dump
1962 { .cmd = OVS_VPORT_CMD_SET,
1963 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1964 .policy = vport_policy,
1965 .doit = ovs_vport_cmd_set,
1969 struct genl_family_and_ops {
1970 struct genl_family *family;
1971 struct genl_ops *ops;
1973 struct genl_multicast_group *group;
1976 static const struct genl_family_and_ops dp_genl_families[] = {
1977 { &dp_datapath_genl_family,
1978 dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops),
1979 &ovs_dp_datapath_multicast_group },
1980 { &dp_vport_genl_family,
1981 dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops),
1982 &ovs_dp_vport_multicast_group },
1983 { &dp_flow_genl_family,
1984 dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops),
1985 &ovs_dp_flow_multicast_group },
1986 { &dp_packet_genl_family,
1987 dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops),
1991 static void dp_unregister_genl(int n_families)
1995 for (i = 0; i < n_families; i++)
1996 genl_unregister_family(dp_genl_families[i].family);
1999 static int dp_register_genl(void)
2006 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
2007 const struct genl_family_and_ops *f = &dp_genl_families[i];
2009 err = genl_register_family_with_ops(f->family, f->ops,
2016 err = genl_register_mc_group(f->family, f->group);
2025 dp_unregister_genl(n_registered);
2029 static int __rehash_flow_table(void *dummy)
2031 struct datapath *dp;
2036 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2038 list_for_each_entry(dp, &ovs_net->dps, list_node) {
2039 struct flow_table *old_table = genl_dereference(dp->table);
2040 struct flow_table *new_table;
2042 new_table = ovs_flow_tbl_rehash(old_table);
2043 if (!IS_ERR(new_table)) {
2044 rcu_assign_pointer(dp->table, new_table);
2045 ovs_flow_tbl_deferred_destroy(old_table);
2053 static void rehash_flow_table(struct work_struct *work)
2055 genl_exec(__rehash_flow_table, NULL);
2056 schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL);
2059 static int dp_destroy_all(void *data)
2061 struct datapath *dp, *dp_next;
2062 struct ovs_net *ovs_net = data;
2064 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
2070 static int __net_init ovs_init_net(struct net *net)
2072 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2074 INIT_LIST_HEAD(&ovs_net->dps);
2078 static void __net_exit ovs_exit_net(struct net *net)
2080 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2082 genl_exec(dp_destroy_all, ovs_net);
2085 static struct pernet_operations ovs_net_ops = {
2086 .init = ovs_init_net,
2087 .exit = ovs_exit_net,
2089 .size = sizeof(struct ovs_net),
2092 static int __init dp_init(void)
2094 struct sk_buff *dummy_skb;
2097 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb));
2099 pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n",
2102 err = genl_exec_init();
2106 err = ovs_workqueues_init();
2108 goto error_genl_exec;
2110 err = ovs_tnl_init();
2114 err = ovs_flow_init();
2116 goto error_tnl_exit;
2118 err = ovs_vport_init();
2120 goto error_flow_exit;
2122 err = register_pernet_device(&ovs_net_ops);
2124 goto error_vport_exit;
2126 err = register_netdevice_notifier(&ovs_dp_device_notifier);
2128 goto error_netns_exit;
2130 err = dp_register_genl();
2132 goto error_unreg_notifier;
2134 schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL);
2138 error_unreg_notifier:
2139 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2141 unregister_pernet_device(&ovs_net_ops);
2149 ovs_workqueues_exit();
2156 static void dp_cleanup(void)
2158 cancel_delayed_work_sync(&rehash_flow_wq);
2159 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
2160 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2161 unregister_pernet_device(&ovs_net_ops);
2166 ovs_workqueues_exit();
2170 module_init(dp_init);
2171 module_exit(dp_cleanup);
2173 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2174 MODULE_LICENSE("GPL");
2175 MODULE_VERSION(VERSION);