2 * Copyright (c) 2007-2012 Nicira Networks.
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 <linux/workqueue.h>
51 #include <net/genetlink.h>
55 #include "vport-internal_dev.h"
60 * Writes to device state (add/remove datapath, port, set operations on vports,
61 * etc.) are protected by RTNL.
63 * Writes to other state (flow table modifications, set miscellaneous datapath
64 * parameters, etc.) are protected by genl_mutex. The RTNL lock nests inside
67 * Reads are protected by RCU.
69 * There are a few special cases (mostly stats) that have their own
70 * synchronization but they nest under all of above and don't interact with
74 /* Global list of datapaths to enable dumping them all out.
75 * Protected by genl_mutex.
77 static LIST_HEAD(dps);
79 #define REHASH_FLOW_INTERVAL (10 * 60 * HZ)
80 static void rehash_flow_table(struct work_struct *work);
81 static DECLARE_DELAYED_WORK(rehash_flow_wq, rehash_flow_table);
83 static struct vport *new_vport(const struct vport_parms *);
84 static int queue_gso_packets(int dp_ifindex, struct sk_buff *,
85 const struct dp_upcall_info *);
86 static int queue_userspace_packet(int dp_ifindex, struct sk_buff *,
87 const struct dp_upcall_info *);
89 /* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */
90 static struct datapath *get_dp(int dp_ifindex)
92 struct datapath *dp = NULL;
93 struct net_device *dev;
96 dev = dev_get_by_index_rcu(&init_net, dp_ifindex);
98 struct vport *vport = ovs_internal_dev_get_vport(dev);
107 /* Must be called with rcu_read_lock or RTNL lock. */
108 const char *ovs_dp_name(const struct datapath *dp)
110 struct vport *vport = rcu_dereference_rtnl(dp->ports[OVSP_LOCAL]);
111 return vport->ops->get_name(vport);
114 static int get_dpifindex(struct datapath *dp)
121 local = rcu_dereference(dp->ports[OVSP_LOCAL]);
123 ifindex = local->ops->get_ifindex(local);
132 static void destroy_dp_rcu(struct rcu_head *rcu)
134 struct datapath *dp = container_of(rcu, struct datapath, rcu);
136 ovs_flow_tbl_destroy((__force struct flow_table *)dp->table);
137 free_percpu(dp->stats_percpu);
141 /* Called with RTNL lock and genl_lock. */
142 static struct vport *new_vport(const struct vport_parms *parms)
146 vport = ovs_vport_add(parms);
147 if (!IS_ERR(vport)) {
148 struct datapath *dp = parms->dp;
150 rcu_assign_pointer(dp->ports[parms->port_no], vport);
151 list_add(&vport->node, &dp->port_list);
157 /* Called with RTNL lock. */
158 void ovs_dp_detach_port(struct vport *p)
162 /* First drop references to device. */
164 rcu_assign_pointer(p->dp->ports[p->port_no], NULL);
166 /* Then destroy it. */
170 /* Must be called with rcu_read_lock. */
171 void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb)
173 struct datapath *dp = p->dp;
174 struct sw_flow *flow;
175 struct dp_stats_percpu *stats;
176 struct sw_flow_key key;
181 stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id());
183 /* Extract flow from 'skb' into 'key'. */
184 error = ovs_flow_extract(skb, p->port_no, &key, &key_len);
185 if (unlikely(error)) {
191 flow = ovs_flow_tbl_lookup(rcu_dereference(dp->table), &key, key_len);
192 if (unlikely(!flow)) {
193 struct dp_upcall_info upcall;
195 upcall.cmd = OVS_PACKET_CMD_MISS;
197 upcall.userdata = NULL;
198 upcall.pid = p->upcall_pid;
199 ovs_dp_upcall(dp, skb, &upcall);
201 stats_counter = &stats->n_missed;
205 OVS_CB(skb)->flow = flow;
207 stats_counter = &stats->n_hit;
208 ovs_flow_used(OVS_CB(skb)->flow, skb);
209 ovs_execute_actions(dp, skb);
212 /* Update datapath statistics. */
213 u64_stats_update_begin(&stats->sync);
215 u64_stats_update_end(&stats->sync);
218 static struct genl_family dp_packet_genl_family = {
219 .id = GENL_ID_GENERATE,
220 .hdrsize = sizeof(struct ovs_header),
221 .name = OVS_PACKET_FAMILY,
222 .version = OVS_PACKET_VERSION,
223 .maxattr = OVS_PACKET_ATTR_MAX
226 int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
227 const struct dp_upcall_info *upcall_info)
229 struct dp_stats_percpu *stats;
233 if (upcall_info->pid == 0) {
238 dp_ifindex = get_dpifindex(dp);
244 if (!skb_is_gso(skb))
245 err = queue_userspace_packet(dp_ifindex, skb, upcall_info);
247 err = queue_gso_packets(dp_ifindex, skb, upcall_info);
254 stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id());
256 u64_stats_update_begin(&stats->sync);
258 u64_stats_update_end(&stats->sync);
263 static int queue_gso_packets(int dp_ifindex, struct sk_buff *skb,
264 const struct dp_upcall_info *upcall_info)
266 struct dp_upcall_info later_info;
267 struct sw_flow_key later_key;
268 struct sk_buff *segs, *nskb;
271 segs = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM);
275 /* Queue all of the segments. */
278 err = queue_userspace_packet(dp_ifindex, skb, upcall_info);
282 if (skb == segs && skb_shinfo(skb)->gso_type & SKB_GSO_UDP) {
283 /* The initial flow key extracted by ovs_flow_extract()
284 * in this case is for a first fragment, so we need to
285 * properly mark later fragments.
287 later_key = *upcall_info->key;
288 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
290 later_info = *upcall_info;
291 later_info.key = &later_key;
292 upcall_info = &later_info;
294 } while ((skb = skb->next));
296 /* Free all of the segments. */
304 } while ((skb = nskb));
308 static int queue_userspace_packet(int dp_ifindex, struct sk_buff *skb,
309 const struct dp_upcall_info *upcall_info)
311 struct ovs_header *upcall;
312 struct sk_buff *nskb = NULL;
313 struct sk_buff *user_skb; /* to be queued to userspace */
318 if (vlan_tx_tag_present(skb)) {
319 nskb = skb_clone(skb, GFP_ATOMIC);
323 nskb = __vlan_put_tag(nskb, vlan_tx_tag_get(nskb));
331 if (nla_attr_size(skb->len) > USHRT_MAX) {
336 len = sizeof(struct ovs_header);
337 len += nla_total_size(skb->len);
338 len += nla_total_size(FLOW_BUFSIZE);
339 if (upcall_info->cmd == OVS_PACKET_CMD_ACTION)
340 len += nla_total_size(8);
342 user_skb = genlmsg_new(len, GFP_ATOMIC);
348 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
349 0, upcall_info->cmd);
350 upcall->dp_ifindex = dp_ifindex;
352 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
353 ovs_flow_to_nlattrs(upcall_info->key, user_skb);
354 nla_nest_end(user_skb, nla);
356 if (upcall_info->userdata)
357 nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA,
358 nla_get_u64(upcall_info->userdata));
360 nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len);
362 skb_copy_and_csum_dev(skb, nla_data(nla));
364 err = genlmsg_unicast(&init_net, user_skb, upcall_info->pid);
371 /* Called with genl_mutex. */
372 static int flush_flows(int dp_ifindex)
374 struct flow_table *old_table;
375 struct flow_table *new_table;
378 dp = get_dp(dp_ifindex);
382 old_table = genl_dereference(dp->table);
383 new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS);
387 rcu_assign_pointer(dp->table, new_table);
389 ovs_flow_tbl_deferred_destroy(old_table);
393 static int validate_actions(const struct nlattr *attr,
394 const struct sw_flow_key *key, int depth);
396 static int validate_sample(const struct nlattr *attr,
397 const struct sw_flow_key *key, int depth)
399 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
400 const struct nlattr *probability, *actions;
401 const struct nlattr *a;
404 memset(attrs, 0, sizeof(attrs));
405 nla_for_each_nested(a, attr, rem) {
406 int type = nla_type(a);
407 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
414 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
415 if (!probability || nla_len(probability) != sizeof(u32))
418 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
419 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
421 return validate_actions(actions, key, depth + 1);
424 static int validate_tp_port(const struct sw_flow_key *flow_key)
426 if (flow_key->eth.type == htons(ETH_P_IP)) {
427 if (flow_key->ipv4.tp.src && flow_key->ipv4.tp.dst)
429 } else if (flow_key->eth.type == htons(ETH_P_IPV6)) {
430 if (flow_key->ipv6.tp.src && flow_key->ipv6.tp.dst)
437 static int validate_set(const struct nlattr *a,
438 const struct sw_flow_key *flow_key)
440 const struct nlattr *ovs_key = nla_data(a);
441 int key_type = nla_type(ovs_key);
443 /* There can be only one key in a action */
444 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
447 if (key_type > OVS_KEY_ATTR_MAX ||
448 nla_len(ovs_key) != ovs_key_lens[key_type])
452 const struct ovs_key_ipv4 *ipv4_key;
454 case OVS_KEY_ATTR_PRIORITY:
455 case OVS_KEY_ATTR_ETHERNET:
458 case OVS_KEY_ATTR_IPV4:
459 if (flow_key->eth.type != htons(ETH_P_IP))
462 if (!flow_key->ipv4.addr.src || !flow_key->ipv4.addr.dst)
465 ipv4_key = nla_data(ovs_key);
466 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
469 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
474 case OVS_KEY_ATTR_TCP:
475 if (flow_key->ip.proto != IPPROTO_TCP)
478 return validate_tp_port(flow_key);
480 case OVS_KEY_ATTR_UDP:
481 if (flow_key->ip.proto != IPPROTO_UDP)
484 return validate_tp_port(flow_key);
493 static int validate_userspace(const struct nlattr *attr)
495 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
496 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
497 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_U64 },
499 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
502 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
503 attr, userspace_policy);
507 if (!a[OVS_USERSPACE_ATTR_PID] ||
508 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
514 static int validate_actions(const struct nlattr *attr,
515 const struct sw_flow_key *key, int depth)
517 const struct nlattr *a;
520 if (depth >= SAMPLE_ACTION_DEPTH)
523 nla_for_each_nested(a, attr, rem) {
524 /* Expected argument lengths, (u32)-1 for variable length. */
525 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
526 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
527 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
528 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
529 [OVS_ACTION_ATTR_POP_VLAN] = 0,
530 [OVS_ACTION_ATTR_SET] = (u32)-1,
531 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1
533 const struct ovs_action_push_vlan *vlan;
534 int type = nla_type(a);
536 if (type > OVS_ACTION_ATTR_MAX ||
537 (action_lens[type] != nla_len(a) &&
538 action_lens[type] != (u32)-1))
542 case OVS_ACTION_ATTR_UNSPEC:
545 case OVS_ACTION_ATTR_USERSPACE:
546 err = validate_userspace(a);
551 case OVS_ACTION_ATTR_OUTPUT:
552 if (nla_get_u32(a) >= DP_MAX_PORTS)
557 case OVS_ACTION_ATTR_POP_VLAN:
560 case OVS_ACTION_ATTR_PUSH_VLAN:
562 if (vlan->vlan_tpid != htons(ETH_P_8021Q))
564 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
568 case OVS_ACTION_ATTR_SET:
569 err = validate_set(a, key);
574 case OVS_ACTION_ATTR_SAMPLE:
575 err = validate_sample(a, key, depth);
591 static void clear_stats(struct sw_flow *flow)
595 flow->packet_count = 0;
596 flow->byte_count = 0;
599 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
601 struct ovs_header *ovs_header = info->userhdr;
602 struct nlattr **a = info->attrs;
603 struct sw_flow_actions *acts;
604 struct sk_buff *packet;
605 struct sw_flow *flow;
613 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
614 !a[OVS_PACKET_ATTR_ACTIONS] ||
615 nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN)
618 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
619 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
623 skb_reserve(packet, NET_IP_ALIGN);
625 memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len);
627 skb_reset_mac_header(packet);
628 eth = eth_hdr(packet);
630 /* Normally, setting the skb 'protocol' field would be handled by a
631 * call to eth_type_trans(), but it assumes there's a sending
632 * device, which we may not have. */
633 if (ntohs(eth->h_proto) >= 1536)
634 packet->protocol = eth->h_proto;
636 packet->protocol = htons(ETH_P_802_2);
638 /* Build an sw_flow for sending this packet. */
639 flow = ovs_flow_alloc();
644 err = ovs_flow_extract(packet, -1, &flow->key, &key_len);
648 err = ovs_flow_metadata_from_nlattrs(&flow->key.phy.priority,
649 &flow->key.phy.in_port,
650 a[OVS_PACKET_ATTR_KEY]);
654 err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0);
658 flow->hash = ovs_flow_hash(&flow->key, key_len);
660 acts = ovs_flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]);
664 rcu_assign_pointer(flow->sf_acts, acts);
666 OVS_CB(packet)->flow = flow;
667 packet->priority = flow->key.phy.priority;
670 dp = get_dp(ovs_header->dp_ifindex);
676 err = ovs_execute_actions(dp, packet);
693 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
694 [OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC },
695 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
696 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
699 static struct genl_ops dp_packet_genl_ops[] = {
700 { .cmd = OVS_PACKET_CMD_EXECUTE,
701 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
702 .policy = packet_policy,
703 .doit = ovs_packet_cmd_execute
707 static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats)
710 struct flow_table *table = genl_dereference(dp->table);
712 stats->n_flows = ovs_flow_tbl_count(table);
714 stats->n_hit = stats->n_missed = stats->n_lost = 0;
715 for_each_possible_cpu(i) {
716 const struct dp_stats_percpu *percpu_stats;
717 struct dp_stats_percpu local_stats;
720 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
723 start = u64_stats_fetch_begin_bh(&percpu_stats->sync);
724 local_stats = *percpu_stats;
725 } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start));
727 stats->n_hit += local_stats.n_hit;
728 stats->n_missed += local_stats.n_missed;
729 stats->n_lost += local_stats.n_lost;
733 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
734 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
735 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
736 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
739 static struct genl_family dp_flow_genl_family = {
740 .id = GENL_ID_GENERATE,
741 .hdrsize = sizeof(struct ovs_header),
742 .name = OVS_FLOW_FAMILY,
743 .version = OVS_FLOW_VERSION,
744 .maxattr = OVS_FLOW_ATTR_MAX
747 static struct genl_multicast_group ovs_dp_flow_multicast_group = {
748 .name = OVS_FLOW_MCGROUP
751 /* Called with genl_lock. */
752 static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
753 struct sk_buff *skb, u32 pid,
754 u32 seq, u32 flags, u8 cmd)
756 const int skb_orig_len = skb->len;
757 const struct sw_flow_actions *sf_acts;
758 struct ovs_flow_stats stats;
759 struct ovs_header *ovs_header;
765 sf_acts = rcu_dereference_protected(flow->sf_acts,
766 lockdep_genl_is_held());
768 ovs_header = genlmsg_put(skb, pid, seq, &dp_flow_genl_family, flags, cmd);
772 ovs_header->dp_ifindex = get_dpifindex(dp);
774 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
776 goto nla_put_failure;
777 err = ovs_flow_to_nlattrs(&flow->key, skb);
780 nla_nest_end(skb, nla);
782 spin_lock_bh(&flow->lock);
784 stats.n_packets = flow->packet_count;
785 stats.n_bytes = flow->byte_count;
786 tcp_flags = flow->tcp_flags;
787 spin_unlock_bh(&flow->lock);
790 NLA_PUT_U64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used));
793 NLA_PUT(skb, OVS_FLOW_ATTR_STATS,
794 sizeof(struct ovs_flow_stats), &stats);
797 NLA_PUT_U8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags);
799 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
800 * this is the first flow to be dumped into 'skb'. This is unusual for
801 * Netlink but individual action lists can be longer than
802 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
803 * The userspace caller can always fetch the actions separately if it
804 * really wants them. (Most userspace callers in fact don't care.)
806 * This can only fail for dump operations because the skb is always
807 * properly sized for single flows.
809 err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len,
811 if (err < 0 && skb_orig_len)
814 return genlmsg_end(skb, ovs_header);
819 genlmsg_cancel(skb, ovs_header);
823 static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow)
825 const struct sw_flow_actions *sf_acts;
828 sf_acts = rcu_dereference_protected(flow->sf_acts,
829 lockdep_genl_is_held());
831 /* OVS_FLOW_ATTR_KEY */
832 len = nla_total_size(FLOW_BUFSIZE);
833 /* OVS_FLOW_ATTR_ACTIONS */
834 len += nla_total_size(sf_acts->actions_len);
835 /* OVS_FLOW_ATTR_STATS */
836 len += nla_total_size(sizeof(struct ovs_flow_stats));
837 /* OVS_FLOW_ATTR_TCP_FLAGS */
838 len += nla_total_size(1);
839 /* OVS_FLOW_ATTR_USED */
840 len += nla_total_size(8);
842 len += NLMSG_ALIGN(sizeof(struct ovs_header));
844 return genlmsg_new(len, GFP_KERNEL);
847 static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow,
849 u32 pid, u32 seq, u8 cmd)
854 skb = ovs_flow_cmd_alloc_info(flow);
856 return ERR_PTR(-ENOMEM);
858 retval = ovs_flow_cmd_fill_info(flow, dp, skb, pid, seq, 0, cmd);
863 static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
865 struct nlattr **a = info->attrs;
866 struct ovs_header *ovs_header = info->userhdr;
867 struct sw_flow_key key;
868 struct sw_flow *flow;
869 struct sk_buff *reply;
871 struct flow_table *table;
877 if (!a[OVS_FLOW_ATTR_KEY])
879 error = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
883 /* Validate actions. */
884 if (a[OVS_FLOW_ATTR_ACTIONS]) {
885 error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0);
888 } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) {
893 dp = get_dp(ovs_header->dp_ifindex);
898 table = genl_dereference(dp->table);
899 flow = ovs_flow_tbl_lookup(table, &key, key_len);
901 struct sw_flow_actions *acts;
903 /* Bail out if we're not allowed to create a new flow. */
905 if (info->genlhdr->cmd == OVS_FLOW_CMD_SET)
908 /* Expand table, if necessary, to make room. */
909 if (ovs_flow_tbl_need_to_expand(table)) {
910 struct flow_table *new_table;
912 new_table = ovs_flow_tbl_expand(table);
913 if (!IS_ERR(new_table)) {
914 rcu_assign_pointer(dp->table, new_table);
915 ovs_flow_tbl_deferred_destroy(table);
916 table = genl_dereference(dp->table);
921 flow = ovs_flow_alloc();
923 error = PTR_ERR(flow);
929 /* Obtain actions. */
930 acts = ovs_flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]);
931 error = PTR_ERR(acts);
933 goto error_free_flow;
934 rcu_assign_pointer(flow->sf_acts, acts);
936 /* Put flow in bucket. */
937 flow->hash = ovs_flow_hash(&key, key_len);
938 ovs_flow_tbl_insert(table, flow);
940 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid,
944 /* We found a matching flow. */
945 struct sw_flow_actions *old_acts;
946 struct nlattr *acts_attrs;
948 /* Bail out if we're not allowed to modify an existing flow.
949 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
950 * because Generic Netlink treats the latter as a dump
951 * request. We also accept NLM_F_EXCL in case that bug ever
955 if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW &&
956 info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL))
959 /* Update actions. */
960 old_acts = rcu_dereference_protected(flow->sf_acts,
961 lockdep_genl_is_held());
962 acts_attrs = a[OVS_FLOW_ATTR_ACTIONS];
964 (old_acts->actions_len != nla_len(acts_attrs) ||
965 memcmp(old_acts->actions, nla_data(acts_attrs),
966 old_acts->actions_len))) {
967 struct sw_flow_actions *new_acts;
969 new_acts = ovs_flow_actions_alloc(acts_attrs);
970 error = PTR_ERR(new_acts);
971 if (IS_ERR(new_acts))
974 rcu_assign_pointer(flow->sf_acts, new_acts);
975 ovs_flow_deferred_free_acts(old_acts);
978 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid,
979 info->snd_seq, OVS_FLOW_CMD_NEW);
982 if (a[OVS_FLOW_ATTR_CLEAR]) {
983 spin_lock_bh(&flow->lock);
985 spin_unlock_bh(&flow->lock);
990 genl_notify(reply, genl_info_net(info), info->snd_pid,
991 ovs_dp_flow_multicast_group.id, info->nlhdr,
994 netlink_set_err(init_net.genl_sock, 0,
995 ovs_dp_flow_multicast_group.id, PTR_ERR(reply));
1004 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
1006 struct nlattr **a = info->attrs;
1007 struct ovs_header *ovs_header = info->userhdr;
1008 struct sw_flow_key key;
1009 struct sk_buff *reply;
1010 struct sw_flow *flow;
1011 struct datapath *dp;
1012 struct flow_table *table;
1016 if (!a[OVS_FLOW_ATTR_KEY])
1018 err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
1022 dp = get_dp(ovs_header->dp_ifindex);
1026 table = genl_dereference(dp->table);
1027 flow = ovs_flow_tbl_lookup(table, &key, key_len);
1031 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid,
1032 info->snd_seq, OVS_FLOW_CMD_NEW);
1034 return PTR_ERR(reply);
1036 return genlmsg_reply(reply, info);
1039 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
1041 struct nlattr **a = info->attrs;
1042 struct ovs_header *ovs_header = info->userhdr;
1043 struct sw_flow_key key;
1044 struct sk_buff *reply;
1045 struct sw_flow *flow;
1046 struct datapath *dp;
1047 struct flow_table *table;
1051 if (!a[OVS_FLOW_ATTR_KEY])
1052 return flush_flows(ovs_header->dp_ifindex);
1053 err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
1057 dp = get_dp(ovs_header->dp_ifindex);
1061 table = genl_dereference(dp->table);
1062 flow = ovs_flow_tbl_lookup(table, &key, key_len);
1066 reply = ovs_flow_cmd_alloc_info(flow);
1070 ovs_flow_tbl_remove(table, flow);
1072 err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_pid,
1073 info->snd_seq, 0, OVS_FLOW_CMD_DEL);
1076 ovs_flow_deferred_free(flow);
1078 genl_notify(reply, genl_info_net(info), info->snd_pid,
1079 ovs_dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL);
1083 static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1085 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1086 struct datapath *dp;
1087 struct flow_table *table;
1089 dp = get_dp(ovs_header->dp_ifindex);
1093 table = genl_dereference(dp->table);
1096 struct sw_flow *flow;
1099 bucket = cb->args[0];
1101 flow = ovs_flow_tbl_next(table, &bucket, &obj);
1105 if (ovs_flow_cmd_fill_info(flow, dp, skb,
1106 NETLINK_CB(cb->skb).pid,
1107 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1108 OVS_FLOW_CMD_NEW) < 0)
1111 cb->args[0] = bucket;
1117 static struct genl_ops dp_flow_genl_ops[] = {
1118 { .cmd = OVS_FLOW_CMD_NEW,
1119 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1120 .policy = flow_policy,
1121 .doit = ovs_flow_cmd_new_or_set
1123 { .cmd = OVS_FLOW_CMD_DEL,
1124 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1125 .policy = flow_policy,
1126 .doit = ovs_flow_cmd_del
1128 { .cmd = OVS_FLOW_CMD_GET,
1129 .flags = 0, /* OK for unprivileged users. */
1130 .policy = flow_policy,
1131 .doit = ovs_flow_cmd_get,
1132 .dumpit = ovs_flow_cmd_dump
1134 { .cmd = OVS_FLOW_CMD_SET,
1135 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1136 .policy = flow_policy,
1137 .doit = ovs_flow_cmd_new_or_set,
1141 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1142 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1143 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1146 static struct genl_family dp_datapath_genl_family = {
1147 .id = GENL_ID_GENERATE,
1148 .hdrsize = sizeof(struct ovs_header),
1149 .name = OVS_DATAPATH_FAMILY,
1150 .version = OVS_DATAPATH_VERSION,
1151 .maxattr = OVS_DP_ATTR_MAX
1154 static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
1155 .name = OVS_DATAPATH_MCGROUP
1158 static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
1159 u32 pid, u32 seq, u32 flags, u8 cmd)
1161 struct ovs_header *ovs_header;
1162 struct ovs_dp_stats dp_stats;
1165 ovs_header = genlmsg_put(skb, pid, seq, &dp_datapath_genl_family,
1170 ovs_header->dp_ifindex = get_dpifindex(dp);
1173 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
1176 goto nla_put_failure;
1178 get_dp_stats(dp, &dp_stats);
1179 NLA_PUT(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats);
1181 return genlmsg_end(skb, ovs_header);
1184 genlmsg_cancel(skb, ovs_header);
1189 static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid,
1192 struct sk_buff *skb;
1195 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1197 return ERR_PTR(-ENOMEM);
1199 retval = ovs_dp_cmd_fill_info(dp, skb, pid, seq, 0, cmd);
1202 return ERR_PTR(retval);
1207 /* Called with genl_mutex and optionally with RTNL lock also. */
1208 static struct datapath *lookup_datapath(struct ovs_header *ovs_header,
1209 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1211 struct datapath *dp;
1213 if (!a[OVS_DP_ATTR_NAME])
1214 dp = get_dp(ovs_header->dp_ifindex);
1216 struct vport *vport;
1219 vport = ovs_vport_locate(nla_data(a[OVS_DP_ATTR_NAME]));
1220 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1223 return dp ? dp : ERR_PTR(-ENODEV);
1226 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1228 struct nlattr **a = info->attrs;
1229 struct vport_parms parms;
1230 struct sk_buff *reply;
1231 struct datapath *dp;
1232 struct vport *vport;
1236 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1241 if (!try_module_get(THIS_MODULE))
1242 goto err_unlock_rtnl;
1245 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1247 goto err_put_module;
1248 INIT_LIST_HEAD(&dp->port_list);
1250 /* Allocate table. */
1252 rcu_assign_pointer(dp->table, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS));
1256 dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
1257 if (!dp->stats_percpu) {
1259 goto err_destroy_table;
1262 /* Set up our datapath device. */
1263 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1264 parms.type = OVS_VPORT_TYPE_INTERNAL;
1265 parms.options = NULL;
1267 parms.port_no = OVSP_LOCAL;
1268 parms.upcall_pid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]);
1270 vport = new_vport(&parms);
1271 if (IS_ERR(vport)) {
1272 err = PTR_ERR(vport);
1276 goto err_destroy_percpu;
1279 reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
1280 info->snd_seq, OVS_DP_CMD_NEW);
1281 err = PTR_ERR(reply);
1283 goto err_destroy_local_port;
1285 list_add_tail(&dp->list_node, &dps);
1288 genl_notify(reply, genl_info_net(info), info->snd_pid,
1289 ovs_dp_datapath_multicast_group.id, info->nlhdr,
1293 err_destroy_local_port:
1294 ovs_dp_detach_port(rtnl_dereference(dp->ports[OVSP_LOCAL]));
1296 free_percpu(dp->stats_percpu);
1298 ovs_flow_tbl_destroy(genl_dereference(dp->table));
1302 module_put(THIS_MODULE);
1309 static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1311 struct vport *vport, *next_vport;
1312 struct sk_buff *reply;
1313 struct datapath *dp;
1317 dp = lookup_datapath(info->userhdr, info->attrs);
1322 reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
1323 info->snd_seq, OVS_DP_CMD_DEL);
1324 err = PTR_ERR(reply);
1328 list_for_each_entry_safe(vport, next_vport, &dp->port_list, node)
1329 if (vport->port_no != OVSP_LOCAL)
1330 ovs_dp_detach_port(vport);
1332 list_del(&dp->list_node);
1333 ovs_dp_detach_port(rtnl_dereference(dp->ports[OVSP_LOCAL]));
1335 /* rtnl_unlock() will wait until all the references to devices that
1336 * are pending unregistration have been dropped. We do it here to
1337 * ensure that any internal devices (which contain DP pointers) are
1338 * fully destroyed before freeing the datapath.
1342 call_rcu(&dp->rcu, destroy_dp_rcu);
1343 module_put(THIS_MODULE);
1345 genl_notify(reply, genl_info_net(info), info->snd_pid,
1346 ovs_dp_datapath_multicast_group.id, info->nlhdr,
1356 static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1358 struct sk_buff *reply;
1359 struct datapath *dp;
1362 dp = lookup_datapath(info->userhdr, info->attrs);
1366 reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
1367 info->snd_seq, OVS_DP_CMD_NEW);
1368 if (IS_ERR(reply)) {
1369 err = PTR_ERR(reply);
1370 netlink_set_err(init_net.genl_sock, 0,
1371 ovs_dp_datapath_multicast_group.id, err);
1375 genl_notify(reply, genl_info_net(info), info->snd_pid,
1376 ovs_dp_datapath_multicast_group.id, info->nlhdr,
1382 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1384 struct sk_buff *reply;
1385 struct datapath *dp;
1387 dp = lookup_datapath(info->userhdr, info->attrs);
1391 reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
1392 info->snd_seq, OVS_DP_CMD_NEW);
1394 return PTR_ERR(reply);
1396 return genlmsg_reply(reply, info);
1399 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1401 struct datapath *dp;
1402 int skip = cb->args[0];
1405 list_for_each_entry(dp, &dps, list_node) {
1407 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid,
1408 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1409 OVS_DP_CMD_NEW) < 0)
1419 static struct genl_ops dp_datapath_genl_ops[] = {
1420 { .cmd = OVS_DP_CMD_NEW,
1421 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1422 .policy = datapath_policy,
1423 .doit = ovs_dp_cmd_new
1425 { .cmd = OVS_DP_CMD_DEL,
1426 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1427 .policy = datapath_policy,
1428 .doit = ovs_dp_cmd_del
1430 { .cmd = OVS_DP_CMD_GET,
1431 .flags = 0, /* OK for unprivileged users. */
1432 .policy = datapath_policy,
1433 .doit = ovs_dp_cmd_get,
1434 .dumpit = ovs_dp_cmd_dump
1436 { .cmd = OVS_DP_CMD_SET,
1437 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1438 .policy = datapath_policy,
1439 .doit = ovs_dp_cmd_set,
1443 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1444 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1445 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1446 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1447 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1448 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1449 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1452 static struct genl_family dp_vport_genl_family = {
1453 .id = GENL_ID_GENERATE,
1454 .hdrsize = sizeof(struct ovs_header),
1455 .name = OVS_VPORT_FAMILY,
1456 .version = OVS_VPORT_VERSION,
1457 .maxattr = OVS_VPORT_ATTR_MAX
1460 struct genl_multicast_group ovs_dp_vport_multicast_group = {
1461 .name = OVS_VPORT_MCGROUP
1464 /* Called with RTNL lock or RCU read lock. */
1465 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
1466 u32 pid, u32 seq, u32 flags, u8 cmd)
1468 struct ovs_header *ovs_header;
1469 struct ovs_vport_stats vport_stats;
1472 ovs_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family,
1477 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1479 NLA_PUT_U32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no);
1480 NLA_PUT_U32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type);
1481 NLA_PUT_STRING(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport));
1482 NLA_PUT_U32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_pid);
1484 ovs_vport_get_stats(vport, &vport_stats);
1485 NLA_PUT(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
1488 err = ovs_vport_get_options(vport, skb);
1489 if (err == -EMSGSIZE)
1492 return genlmsg_end(skb, ovs_header);
1497 genlmsg_cancel(skb, ovs_header);
1501 /* Called with RTNL lock or RCU read lock. */
1502 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid,
1505 struct sk_buff *skb;
1508 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1510 return ERR_PTR(-ENOMEM);
1512 retval = ovs_vport_cmd_fill_info(vport, skb, pid, seq, 0, cmd);
1515 return ERR_PTR(retval);
1520 /* Called with RTNL lock or RCU read lock. */
1521 static struct vport *lookup_vport(struct ovs_header *ovs_header,
1522 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1524 struct datapath *dp;
1525 struct vport *vport;
1527 if (a[OVS_VPORT_ATTR_NAME]) {
1528 vport = ovs_vport_locate(nla_data(a[OVS_VPORT_ATTR_NAME]));
1530 return ERR_PTR(-ENODEV);
1531 if (ovs_header->dp_ifindex &&
1532 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
1533 return ERR_PTR(-ENODEV);
1535 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1536 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1538 if (port_no >= DP_MAX_PORTS)
1539 return ERR_PTR(-EFBIG);
1541 dp = get_dp(ovs_header->dp_ifindex);
1543 return ERR_PTR(-ENODEV);
1545 vport = rcu_dereference_rtnl(dp->ports[port_no]);
1547 return ERR_PTR(-ENOENT);
1550 return ERR_PTR(-EINVAL);
1553 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1555 struct nlattr **a = info->attrs;
1556 struct ovs_header *ovs_header = info->userhdr;
1557 struct vport_parms parms;
1558 struct sk_buff *reply;
1559 struct vport *vport;
1560 struct datapath *dp;
1565 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1566 !a[OVS_VPORT_ATTR_UPCALL_PID])
1570 dp = get_dp(ovs_header->dp_ifindex);
1575 if (a[OVS_VPORT_ATTR_PORT_NO]) {
1576 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1579 if (port_no >= DP_MAX_PORTS)
1582 vport = rtnl_dereference(dp->ports[port_no]);
1587 for (port_no = 1; ; port_no++) {
1588 if (port_no >= DP_MAX_PORTS) {
1592 vport = rtnl_dereference(dp->ports[port_no]);
1598 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1599 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1600 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1602 parms.port_no = port_no;
1603 parms.upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1605 vport = new_vport(&parms);
1606 err = PTR_ERR(vport);
1610 reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
1612 if (IS_ERR(reply)) {
1613 err = PTR_ERR(reply);
1614 ovs_dp_detach_port(vport);
1617 genl_notify(reply, genl_info_net(info), info->snd_pid,
1618 ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1626 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1628 struct nlattr **a = info->attrs;
1629 struct sk_buff *reply;
1630 struct vport *vport;
1634 vport = lookup_vport(info->userhdr, a);
1635 err = PTR_ERR(vport);
1640 if (a[OVS_VPORT_ATTR_TYPE] &&
1641 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type)
1644 if (!err && a[OVS_VPORT_ATTR_OPTIONS])
1645 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
1646 if (!err && a[OVS_VPORT_ATTR_UPCALL_PID])
1647 vport->upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1649 reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
1651 if (IS_ERR(reply)) {
1652 netlink_set_err(init_net.genl_sock, 0,
1653 ovs_dp_vport_multicast_group.id, PTR_ERR(reply));
1657 genl_notify(reply, genl_info_net(info), info->snd_pid,
1658 ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1665 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1667 struct nlattr **a = info->attrs;
1668 struct sk_buff *reply;
1669 struct vport *vport;
1673 vport = lookup_vport(info->userhdr, a);
1674 err = PTR_ERR(vport);
1678 if (vport->port_no == OVSP_LOCAL) {
1683 reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
1685 err = PTR_ERR(reply);
1689 ovs_dp_detach_port(vport);
1691 genl_notify(reply, genl_info_net(info), info->snd_pid,
1692 ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1699 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1701 struct nlattr **a = info->attrs;
1702 struct ovs_header *ovs_header = info->userhdr;
1703 struct sk_buff *reply;
1704 struct vport *vport;
1708 vport = lookup_vport(ovs_header, a);
1709 err = PTR_ERR(vport);
1713 reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
1715 err = PTR_ERR(reply);
1721 return genlmsg_reply(reply, info);
1728 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1730 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1731 struct datapath *dp;
1735 dp = get_dp(ovs_header->dp_ifindex);
1740 for (port_no = cb->args[0]; port_no < DP_MAX_PORTS; port_no++) {
1741 struct vport *vport;
1743 vport = rcu_dereference(dp->ports[port_no]);
1747 if (ovs_vport_cmd_fill_info(vport, skb, NETLINK_CB(cb->skb).pid,
1748 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1749 OVS_VPORT_CMD_NEW) < 0)
1754 cb->args[0] = port_no;
1760 static void rehash_flow_table(struct work_struct *work)
1762 struct datapath *dp;
1766 list_for_each_entry(dp, &dps, list_node) {
1767 struct flow_table *old_table = genl_dereference(dp->table);
1768 struct flow_table *new_table;
1770 new_table = ovs_flow_tbl_rehash(old_table);
1771 if (!IS_ERR(new_table)) {
1772 rcu_assign_pointer(dp->table, new_table);
1773 ovs_flow_tbl_deferred_destroy(old_table);
1779 schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL);
1782 static struct genl_ops dp_vport_genl_ops[] = {
1783 { .cmd = OVS_VPORT_CMD_NEW,
1784 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1785 .policy = vport_policy,
1786 .doit = ovs_vport_cmd_new
1788 { .cmd = OVS_VPORT_CMD_DEL,
1789 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1790 .policy = vport_policy,
1791 .doit = ovs_vport_cmd_del
1793 { .cmd = OVS_VPORT_CMD_GET,
1794 .flags = 0, /* OK for unprivileged users. */
1795 .policy = vport_policy,
1796 .doit = ovs_vport_cmd_get,
1797 .dumpit = ovs_vport_cmd_dump
1799 { .cmd = OVS_VPORT_CMD_SET,
1800 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1801 .policy = vport_policy,
1802 .doit = ovs_vport_cmd_set,
1806 struct genl_family_and_ops {
1807 struct genl_family *family;
1808 struct genl_ops *ops;
1810 struct genl_multicast_group *group;
1813 static const struct genl_family_and_ops dp_genl_families[] = {
1814 { &dp_datapath_genl_family,
1815 dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops),
1816 &ovs_dp_datapath_multicast_group },
1817 { &dp_vport_genl_family,
1818 dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops),
1819 &ovs_dp_vport_multicast_group },
1820 { &dp_flow_genl_family,
1821 dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops),
1822 &ovs_dp_flow_multicast_group },
1823 { &dp_packet_genl_family,
1824 dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops),
1828 static void dp_unregister_genl(int n_families)
1832 for (i = 0; i < n_families; i++)
1833 genl_unregister_family(dp_genl_families[i].family);
1836 static int dp_register_genl(void)
1843 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
1844 const struct genl_family_and_ops *f = &dp_genl_families[i];
1846 err = genl_register_family_with_ops(f->family, f->ops,
1853 err = genl_register_mc_group(f->family, f->group);
1862 dp_unregister_genl(n_registered);
1866 static int __init dp_init(void)
1868 struct sk_buff *dummy_skb;
1871 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb));
1873 pr_info("Open vSwitch switching datapath\n");
1875 err = ovs_flow_init();
1879 err = ovs_vport_init();
1881 goto error_flow_exit;
1883 err = register_netdevice_notifier(&ovs_dp_device_notifier);
1885 goto error_vport_exit;
1887 err = dp_register_genl();
1889 goto error_unreg_notifier;
1891 schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL);
1895 error_unreg_notifier:
1896 unregister_netdevice_notifier(&ovs_dp_device_notifier);
1905 static void dp_cleanup(void)
1907 cancel_delayed_work_sync(&rehash_flow_wq);
1909 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
1910 unregister_netdevice_notifier(&ovs_dp_device_notifier);
1915 module_init(dp_init);
1916 module_exit(dp_cleanup);
1918 MODULE_DESCRIPTION("Open vSwitch switching datapath");
1919 MODULE_LICENSE("GPL");