1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2007-2014 Nicira, Inc.
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8 #include <linux/init.h>
9 #include <linux/module.h>
10 #include <linux/if_arp.h>
11 #include <linux/if_vlan.h>
14 #include <linux/jhash.h>
15 #include <linux/delay.h>
16 #include <linux/time.h>
17 #include <linux/etherdevice.h>
18 #include <linux/genetlink.h>
19 #include <linux/kernel.h>
20 #include <linux/kthread.h>
21 #include <linux/mutex.h>
22 #include <linux/percpu.h>
23 #include <linux/rcupdate.h>
24 #include <linux/tcp.h>
25 #include <linux/udp.h>
26 #include <linux/ethtool.h>
27 #include <linux/wait.h>
28 #include <asm/div64.h>
29 #include <linux/highmem.h>
30 #include <linux/netfilter_bridge.h>
31 #include <linux/netfilter_ipv4.h>
32 #include <linux/inetdevice.h>
33 #include <linux/list.h>
34 #include <linux/openvswitch.h>
35 #include <linux/rculist.h>
36 #include <linux/dmi.h>
37 #include <net/genetlink.h>
38 #include <net/net_namespace.h>
39 #include <net/netns/generic.h>
43 #include "flow_table.h"
44 #include "flow_netlink.h"
46 #include "vport-internal_dev.h"
47 #include "vport-netdev.h"
49 unsigned int ovs_net_id __read_mostly;
51 static struct genl_family dp_packet_genl_family;
52 static struct genl_family dp_flow_genl_family;
53 static struct genl_family dp_datapath_genl_family;
55 static const struct nla_policy flow_policy[];
57 static const struct genl_multicast_group ovs_dp_flow_multicast_group = {
58 .name = OVS_FLOW_MCGROUP,
61 static const struct genl_multicast_group ovs_dp_datapath_multicast_group = {
62 .name = OVS_DATAPATH_MCGROUP,
65 static const struct genl_multicast_group ovs_dp_vport_multicast_group = {
66 .name = OVS_VPORT_MCGROUP,
69 /* Check if need to build a reply message.
70 * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */
71 static bool ovs_must_notify(struct genl_family *family, struct genl_info *info,
74 return info->nlhdr->nlmsg_flags & NLM_F_ECHO ||
75 genl_has_listeners(family, genl_info_net(info), group);
78 static void ovs_notify(struct genl_family *family,
79 struct sk_buff *skb, struct genl_info *info)
81 genl_notify(family, skb, info, 0, GFP_KERNEL);
87 * All writes e.g. Writes to device state (add/remove datapath, port, set
88 * operations on vports, etc.), Writes to other state (flow table
89 * modifications, set miscellaneous datapath parameters, etc.) are protected
92 * Reads are protected by RCU.
94 * There are a few special cases (mostly stats) that have their own
95 * synchronization but they nest under all of above and don't interact with
98 * The RTNL lock nests inside ovs_mutex.
101 static DEFINE_MUTEX(ovs_mutex);
105 mutex_lock(&ovs_mutex);
108 void ovs_unlock(void)
110 mutex_unlock(&ovs_mutex);
113 #ifdef CONFIG_LOCKDEP
114 int lockdep_ovsl_is_held(void)
117 return lockdep_is_held(&ovs_mutex);
123 static struct vport *new_vport(const struct vport_parms *);
124 static int queue_gso_packets(struct datapath *dp, struct sk_buff *,
125 const struct sw_flow_key *,
126 const struct dp_upcall_info *,
128 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *,
129 const struct sw_flow_key *,
130 const struct dp_upcall_info *,
133 /* Must be called with rcu_read_lock or ovs_mutex. */
134 const char *ovs_dp_name(const struct datapath *dp)
136 struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
137 return ovs_vport_name(vport);
140 static int get_dpifindex(const struct datapath *dp)
147 local = ovs_vport_rcu(dp, OVSP_LOCAL);
149 ifindex = local->dev->ifindex;
158 static void destroy_dp_rcu(struct rcu_head *rcu)
160 struct datapath *dp = container_of(rcu, struct datapath, rcu);
162 ovs_flow_tbl_destroy(&dp->table);
163 free_percpu(dp->stats_percpu);
169 static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
172 return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
175 /* Called with ovs_mutex or RCU read lock. */
176 struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
179 struct hlist_head *head;
181 head = vport_hash_bucket(dp, port_no);
182 hlist_for_each_entry_rcu(vport, head, dp_hash_node) {
183 if (vport->port_no == port_no)
189 /* Called with ovs_mutex. */
190 static struct vport *new_vport(const struct vport_parms *parms)
194 vport = ovs_vport_add(parms);
195 if (!IS_ERR(vport)) {
196 struct datapath *dp = parms->dp;
197 struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
199 hlist_add_head_rcu(&vport->dp_hash_node, head);
204 void ovs_dp_detach_port(struct vport *p)
208 /* First drop references to device. */
209 hlist_del_rcu(&p->dp_hash_node);
211 /* Then destroy it. */
215 /* Must be called with rcu_read_lock. */
216 void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key)
218 const struct vport *p = OVS_CB(skb)->input_vport;
219 struct datapath *dp = p->dp;
220 struct sw_flow *flow;
221 struct sw_flow_actions *sf_acts;
222 struct dp_stats_percpu *stats;
227 stats = this_cpu_ptr(dp->stats_percpu);
230 flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb),
232 if (unlikely(!flow)) {
233 struct dp_upcall_info upcall;
235 memset(&upcall, 0, sizeof(upcall));
236 upcall.cmd = OVS_PACKET_CMD_MISS;
237 upcall.portid = ovs_vport_find_upcall_portid(p, skb);
238 upcall.mru = OVS_CB(skb)->mru;
239 error = ovs_dp_upcall(dp, skb, key, &upcall, 0);
244 stats_counter = &stats->n_missed;
248 ovs_flow_stats_update(flow, key->tp.flags, skb);
249 sf_acts = rcu_dereference(flow->sf_acts);
250 error = ovs_execute_actions(dp, skb, sf_acts, key);
252 net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n",
253 ovs_dp_name(dp), error);
255 stats_counter = &stats->n_hit;
258 /* Update datapath statistics. */
259 u64_stats_update_begin(&stats->syncp);
261 stats->n_mask_hit += n_mask_hit;
262 u64_stats_update_end(&stats->syncp);
265 int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
266 const struct sw_flow_key *key,
267 const struct dp_upcall_info *upcall_info,
270 struct dp_stats_percpu *stats;
273 if (upcall_info->portid == 0) {
278 if (!skb_is_gso(skb))
279 err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen);
281 err = queue_gso_packets(dp, skb, key, upcall_info, cutlen);
288 stats = this_cpu_ptr(dp->stats_percpu);
290 u64_stats_update_begin(&stats->syncp);
292 u64_stats_update_end(&stats->syncp);
297 static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
298 const struct sw_flow_key *key,
299 const struct dp_upcall_info *upcall_info,
302 unsigned int gso_type = skb_shinfo(skb)->gso_type;
303 struct sw_flow_key later_key;
304 struct sk_buff *segs, *nskb;
307 BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET);
308 segs = __skb_gso_segment(skb, NETIF_F_SG, false);
310 return PTR_ERR(segs);
314 if (gso_type & SKB_GSO_UDP) {
315 /* The initial flow key extracted by ovs_flow_key_extract()
316 * in this case is for a first fragment, so we need to
317 * properly mark later fragments.
320 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
323 /* Queue all of the segments. */
326 if (gso_type & SKB_GSO_UDP && skb != segs)
329 err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen);
333 } while ((skb = skb->next));
335 /* Free all of the segments. */
343 } while ((skb = nskb));
347 static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info,
348 unsigned int hdrlen, int actions_attrlen)
350 size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
351 + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */
352 + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */
353 + nla_total_size(sizeof(unsigned int)) /* OVS_PACKET_ATTR_LEN */
354 + nla_total_size(sizeof(u64)); /* OVS_PACKET_ATTR_HASH */
356 /* OVS_PACKET_ATTR_USERDATA */
357 if (upcall_info->userdata)
358 size += NLA_ALIGN(upcall_info->userdata->nla_len);
360 /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */
361 if (upcall_info->egress_tun_info)
362 size += nla_total_size(ovs_tun_key_attr_size());
364 /* OVS_PACKET_ATTR_ACTIONS */
365 if (upcall_info->actions_len)
366 size += nla_total_size(actions_attrlen);
368 /* OVS_PACKET_ATTR_MRU */
369 if (upcall_info->mru)
370 size += nla_total_size(sizeof(upcall_info->mru));
375 static void pad_packet(struct datapath *dp, struct sk_buff *skb)
377 if (!(dp->user_features & OVS_DP_F_UNALIGNED)) {
378 size_t plen = NLA_ALIGN(skb->len) - skb->len;
381 skb_put_zero(skb, plen);
385 static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
386 const struct sw_flow_key *key,
387 const struct dp_upcall_info *upcall_info,
390 struct ovs_header *upcall;
391 struct sk_buff *nskb = NULL;
392 struct sk_buff *user_skb = NULL; /* to be queued to userspace */
399 dp_ifindex = get_dpifindex(dp);
403 if (skb_vlan_tag_present(skb)) {
404 nskb = skb_clone(skb, GFP_ATOMIC);
408 nskb = __vlan_hwaccel_push_inside(nskb);
415 if (nla_attr_size(skb->len) > USHRT_MAX) {
420 /* Complete checksum if needed */
421 if (skb->ip_summed == CHECKSUM_PARTIAL &&
422 (err = skb_csum_hwoffload_help(skb, 0)))
425 /* Older versions of OVS user space enforce alignment of the last
426 * Netlink attribute to NLA_ALIGNTO which would require extensive
427 * padding logic. Only perform zerocopy if padding is not required.
429 if (dp->user_features & OVS_DP_F_UNALIGNED)
430 hlen = skb_zerocopy_headlen(skb);
434 len = upcall_msg_size(upcall_info, hlen - cutlen,
435 OVS_CB(skb)->acts_origlen);
436 user_skb = genlmsg_new(len, GFP_ATOMIC);
442 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
443 0, upcall_info->cmd);
448 upcall->dp_ifindex = dp_ifindex;
450 err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb);
454 if (upcall_info->userdata)
455 __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
456 nla_len(upcall_info->userdata),
457 nla_data(upcall_info->userdata));
459 if (upcall_info->egress_tun_info) {
460 nla = nla_nest_start_noflag(user_skb,
461 OVS_PACKET_ATTR_EGRESS_TUN_KEY);
466 err = ovs_nla_put_tunnel_info(user_skb,
467 upcall_info->egress_tun_info);
471 nla_nest_end(user_skb, nla);
474 if (upcall_info->actions_len) {
475 nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS);
480 err = ovs_nla_put_actions(upcall_info->actions,
481 upcall_info->actions_len,
484 nla_nest_end(user_skb, nla);
486 nla_nest_cancel(user_skb, nla);
489 /* Add OVS_PACKET_ATTR_MRU */
490 if (upcall_info->mru &&
491 nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, upcall_info->mru)) {
496 /* Add OVS_PACKET_ATTR_LEN when packet is truncated */
498 nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, skb->len)) {
503 /* Add OVS_PACKET_ATTR_HASH */
504 hash = skb_get_hash_raw(skb);
506 hash |= OVS_PACKET_HASH_SW_BIT;
509 hash |= OVS_PACKET_HASH_L4_BIT;
511 if (nla_put(user_skb, OVS_PACKET_ATTR_HASH, sizeof (u64), &hash)) {
516 /* Only reserve room for attribute header, packet data is added
517 * in skb_zerocopy() */
518 if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) {
522 nla->nla_len = nla_attr_size(skb->len - cutlen);
524 err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen);
528 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
529 pad_packet(dp, user_skb);
531 ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len;
533 err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid);
543 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
545 struct ovs_header *ovs_header = info->userhdr;
546 struct net *net = sock_net(skb->sk);
547 struct nlattr **a = info->attrs;
548 struct sw_flow_actions *acts;
549 struct sk_buff *packet;
550 struct sw_flow *flow;
551 struct sw_flow_actions *sf_acts;
553 struct vport *input_vport;
558 bool log = !a[OVS_PACKET_ATTR_PROBE];
561 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
562 !a[OVS_PACKET_ATTR_ACTIONS])
565 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
566 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
570 skb_reserve(packet, NET_IP_ALIGN);
572 nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
574 /* Set packet's mru */
575 if (a[OVS_PACKET_ATTR_MRU]) {
576 mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]);
577 packet->ignore_df = 1;
579 OVS_CB(packet)->mru = mru;
581 if (a[OVS_PACKET_ATTR_HASH]) {
582 hash = nla_get_u64(a[OVS_PACKET_ATTR_HASH]);
584 __skb_set_hash(packet, hash & 0xFFFFFFFFULL,
585 !!(hash & OVS_PACKET_HASH_SW_BIT),
586 !!(hash & OVS_PACKET_HASH_L4_BIT));
589 /* Build an sw_flow for sending this packet. */
590 flow = ovs_flow_alloc();
595 err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY],
596 packet, &flow->key, log);
600 err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS],
601 &flow->key, &acts, log);
605 rcu_assign_pointer(flow->sf_acts, acts);
606 packet->priority = flow->key.phy.priority;
607 packet->mark = flow->key.phy.skb_mark;
610 dp = get_dp_rcu(net, ovs_header->dp_ifindex);
615 input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port);
617 input_vport = ovs_vport_rcu(dp, OVSP_LOCAL);
622 packet->dev = input_vport->dev;
623 OVS_CB(packet)->input_vport = input_vport;
624 sf_acts = rcu_dereference(flow->sf_acts);
627 err = ovs_execute_actions(dp, packet, sf_acts, &flow->key);
631 ovs_flow_free(flow, false);
637 ovs_flow_free(flow, false);
644 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
645 [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
646 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
647 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
648 [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG },
649 [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 },
652 static const struct genl_ops dp_packet_genl_ops[] = {
653 { .cmd = OVS_PACKET_CMD_EXECUTE,
654 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
655 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
656 .doit = ovs_packet_cmd_execute
660 static struct genl_family dp_packet_genl_family __ro_after_init = {
661 .hdrsize = sizeof(struct ovs_header),
662 .name = OVS_PACKET_FAMILY,
663 .version = OVS_PACKET_VERSION,
664 .maxattr = OVS_PACKET_ATTR_MAX,
665 .policy = packet_policy,
667 .parallel_ops = true,
668 .ops = dp_packet_genl_ops,
669 .n_ops = ARRAY_SIZE(dp_packet_genl_ops),
670 .module = THIS_MODULE,
673 static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats,
674 struct ovs_dp_megaflow_stats *mega_stats)
678 memset(mega_stats, 0, sizeof(*mega_stats));
680 stats->n_flows = ovs_flow_tbl_count(&dp->table);
681 mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table);
683 stats->n_hit = stats->n_missed = stats->n_lost = 0;
685 for_each_possible_cpu(i) {
686 const struct dp_stats_percpu *percpu_stats;
687 struct dp_stats_percpu local_stats;
690 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
693 start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
694 local_stats = *percpu_stats;
695 } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start));
697 stats->n_hit += local_stats.n_hit;
698 stats->n_missed += local_stats.n_missed;
699 stats->n_lost += local_stats.n_lost;
700 mega_stats->n_mask_hit += local_stats.n_mask_hit;
704 static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags)
706 return ovs_identifier_is_ufid(sfid) &&
707 !(ufid_flags & OVS_UFID_F_OMIT_KEY);
710 static bool should_fill_mask(uint32_t ufid_flags)
712 return !(ufid_flags & OVS_UFID_F_OMIT_MASK);
715 static bool should_fill_actions(uint32_t ufid_flags)
717 return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS);
720 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts,
721 const struct sw_flow_id *sfid,
724 size_t len = NLMSG_ALIGN(sizeof(struct ovs_header));
726 /* OVS_FLOW_ATTR_UFID, or unmasked flow key as fallback
727 * see ovs_nla_put_identifier()
729 if (sfid && ovs_identifier_is_ufid(sfid))
730 len += nla_total_size(sfid->ufid_len);
732 len += nla_total_size(ovs_key_attr_size());
734 /* OVS_FLOW_ATTR_KEY */
735 if (!sfid || should_fill_key(sfid, ufid_flags))
736 len += nla_total_size(ovs_key_attr_size());
738 /* OVS_FLOW_ATTR_MASK */
739 if (should_fill_mask(ufid_flags))
740 len += nla_total_size(ovs_key_attr_size());
742 /* OVS_FLOW_ATTR_ACTIONS */
743 if (should_fill_actions(ufid_flags))
744 len += nla_total_size(acts->orig_len);
747 + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
748 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
749 + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */
752 /* Called with ovs_mutex or RCU read lock. */
753 static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow,
756 struct ovs_flow_stats stats;
760 ovs_flow_stats_get(flow, &stats, &used, &tcp_flags);
763 nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used),
767 if (stats.n_packets &&
768 nla_put_64bit(skb, OVS_FLOW_ATTR_STATS,
769 sizeof(struct ovs_flow_stats), &stats,
773 if ((u8)ntohs(tcp_flags) &&
774 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags)))
780 /* Called with ovs_mutex or RCU read lock. */
781 static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow,
782 struct sk_buff *skb, int skb_orig_len)
784 struct nlattr *start;
787 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
788 * this is the first flow to be dumped into 'skb'. This is unusual for
789 * Netlink but individual action lists can be longer than
790 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
791 * The userspace caller can always fetch the actions separately if it
792 * really wants them. (Most userspace callers in fact don't care.)
794 * This can only fail for dump operations because the skb is always
795 * properly sized for single flows.
797 start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS);
799 const struct sw_flow_actions *sf_acts;
801 sf_acts = rcu_dereference_ovsl(flow->sf_acts);
802 err = ovs_nla_put_actions(sf_acts->actions,
803 sf_acts->actions_len, skb);
806 nla_nest_end(skb, start);
811 nla_nest_cancel(skb, start);
813 } else if (skb_orig_len) {
820 /* Called with ovs_mutex or RCU read lock. */
821 static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex,
822 struct sk_buff *skb, u32 portid,
823 u32 seq, u32 flags, u8 cmd, u32 ufid_flags)
825 const int skb_orig_len = skb->len;
826 struct ovs_header *ovs_header;
829 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family,
834 ovs_header->dp_ifindex = dp_ifindex;
836 err = ovs_nla_put_identifier(flow, skb);
840 if (should_fill_key(&flow->id, ufid_flags)) {
841 err = ovs_nla_put_masked_key(flow, skb);
846 if (should_fill_mask(ufid_flags)) {
847 err = ovs_nla_put_mask(flow, skb);
852 err = ovs_flow_cmd_fill_stats(flow, skb);
856 if (should_fill_actions(ufid_flags)) {
857 err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len);
862 genlmsg_end(skb, ovs_header);
866 genlmsg_cancel(skb, ovs_header);
870 /* May not be called with RCU read lock. */
871 static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts,
872 const struct sw_flow_id *sfid,
873 struct genl_info *info,
880 if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0))
883 len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags);
884 skb = genlmsg_new(len, GFP_KERNEL);
886 return ERR_PTR(-ENOMEM);
891 /* Called with ovs_mutex. */
892 static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow,
894 struct genl_info *info, u8 cmd,
895 bool always, u32 ufid_flags)
900 skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts),
901 &flow->id, info, always, ufid_flags);
902 if (IS_ERR_OR_NULL(skb))
905 retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb,
906 info->snd_portid, info->snd_seq, 0,
908 if (WARN_ON_ONCE(retval < 0)) {
910 skb = ERR_PTR(retval);
915 static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info)
917 struct net *net = sock_net(skb->sk);
918 struct nlattr **a = info->attrs;
919 struct ovs_header *ovs_header = info->userhdr;
920 struct sw_flow *flow = NULL, *new_flow;
921 struct sw_flow_mask mask;
922 struct sk_buff *reply;
924 struct sw_flow_actions *acts;
925 struct sw_flow_match match;
926 u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
928 bool log = !a[OVS_FLOW_ATTR_PROBE];
930 /* Must have key and actions. */
932 if (!a[OVS_FLOW_ATTR_KEY]) {
933 OVS_NLERR(log, "Flow key attr not present in new flow.");
936 if (!a[OVS_FLOW_ATTR_ACTIONS]) {
937 OVS_NLERR(log, "Flow actions attr not present in new flow.");
941 /* Most of the time we need to allocate a new flow, do it before
944 new_flow = ovs_flow_alloc();
945 if (IS_ERR(new_flow)) {
946 error = PTR_ERR(new_flow);
951 ovs_match_init(&match, &new_flow->key, false, &mask);
952 error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY],
953 a[OVS_FLOW_ATTR_MASK], log);
957 /* Extract flow identifier. */
958 error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID],
959 &new_flow->key, log);
963 /* unmasked key is needed to match when ufid is not used. */
964 if (ovs_identifier_is_key(&new_flow->id))
965 match.key = new_flow->id.unmasked_key;
967 ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask);
969 /* Validate actions. */
970 error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS],
971 &new_flow->key, &acts, log);
973 OVS_NLERR(log, "Flow actions may not be safe on all matching packets.");
977 reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false,
980 error = PTR_ERR(reply);
985 dp = get_dp(net, ovs_header->dp_ifindex);
991 /* Check if this is a duplicate flow */
992 if (ovs_identifier_is_ufid(&new_flow->id))
993 flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id);
995 flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key);
997 rcu_assign_pointer(new_flow->sf_acts, acts);
999 /* Put flow in bucket. */
1000 error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask);
1001 if (unlikely(error)) {
1003 goto err_unlock_ovs;
1006 if (unlikely(reply)) {
1007 error = ovs_flow_cmd_fill_info(new_flow,
1008 ovs_header->dp_ifindex,
1009 reply, info->snd_portid,
1017 struct sw_flow_actions *old_acts;
1019 /* Bail out if we're not allowed to modify an existing flow.
1020 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1021 * because Generic Netlink treats the latter as a dump
1022 * request. We also accept NLM_F_EXCL in case that bug ever
1025 if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE
1028 goto err_unlock_ovs;
1030 /* The flow identifier has to be the same for flow updates.
1031 * Look for any overlapping flow.
1033 if (unlikely(!ovs_flow_cmp(flow, &match))) {
1034 if (ovs_identifier_is_key(&flow->id))
1035 flow = ovs_flow_tbl_lookup_exact(&dp->table,
1037 else /* UFID matches but key is different */
1041 goto err_unlock_ovs;
1044 /* Update actions. */
1045 old_acts = ovsl_dereference(flow->sf_acts);
1046 rcu_assign_pointer(flow->sf_acts, acts);
1048 if (unlikely(reply)) {
1049 error = ovs_flow_cmd_fill_info(flow,
1050 ovs_header->dp_ifindex,
1051 reply, info->snd_portid,
1059 ovs_nla_free_flow_actions_rcu(old_acts);
1060 ovs_flow_free(new_flow, false);
1064 ovs_notify(&dp_flow_genl_family, reply, info);
1071 ovs_nla_free_flow_actions(acts);
1073 ovs_flow_free(new_flow, false);
1078 /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */
1079 static noinline_for_stack struct sw_flow_actions *get_flow_actions(struct net *net,
1080 const struct nlattr *a,
1081 const struct sw_flow_key *key,
1082 const struct sw_flow_mask *mask,
1085 struct sw_flow_actions *acts;
1086 struct sw_flow_key masked_key;
1089 ovs_flow_mask_key(&masked_key, key, true, mask);
1090 error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log);
1093 "Actions may not be safe on all matching packets");
1094 return ERR_PTR(error);
1100 /* Factor out match-init and action-copy to avoid
1101 * "Wframe-larger-than=1024" warning. Because mask is only
1102 * used to get actions, we new a function to save some
1105 * If there are not key and action attrs, we return 0
1106 * directly. In the case, the caller will also not use the
1107 * match as before. If there is action attr, we try to get
1108 * actions and save them to *acts. Before returning from
1109 * the function, we reset the match->mask pointer. Because
1110 * we should not to return match object with dangling reference
1113 static noinline_for_stack int
1114 ovs_nla_init_match_and_action(struct net *net,
1115 struct sw_flow_match *match,
1116 struct sw_flow_key *key,
1118 struct sw_flow_actions **acts,
1121 struct sw_flow_mask mask;
1124 if (a[OVS_FLOW_ATTR_KEY]) {
1125 ovs_match_init(match, key, true, &mask);
1126 error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY],
1127 a[OVS_FLOW_ATTR_MASK], log);
1132 if (a[OVS_FLOW_ATTR_ACTIONS]) {
1133 if (!a[OVS_FLOW_ATTR_KEY]) {
1135 "Flow key attribute not present in set flow.");
1140 *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key,
1142 if (IS_ERR(*acts)) {
1143 error = PTR_ERR(*acts);
1148 /* On success, error is 0. */
1154 static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info)
1156 struct net *net = sock_net(skb->sk);
1157 struct nlattr **a = info->attrs;
1158 struct ovs_header *ovs_header = info->userhdr;
1159 struct sw_flow_key key;
1160 struct sw_flow *flow;
1161 struct sk_buff *reply = NULL;
1162 struct datapath *dp;
1163 struct sw_flow_actions *old_acts = NULL, *acts = NULL;
1164 struct sw_flow_match match;
1165 struct sw_flow_id sfid;
1166 u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
1168 bool log = !a[OVS_FLOW_ATTR_PROBE];
1171 ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log);
1172 if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) {
1174 "Flow set message rejected, Key attribute missing.");
1178 error = ovs_nla_init_match_and_action(net, &match, &key, a,
1184 /* Can allocate before locking if have acts. */
1185 reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false,
1187 if (IS_ERR(reply)) {
1188 error = PTR_ERR(reply);
1189 goto err_kfree_acts;
1194 dp = get_dp(net, ovs_header->dp_ifindex);
1195 if (unlikely(!dp)) {
1197 goto err_unlock_ovs;
1199 /* Check that the flow exists. */
1201 flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid);
1203 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
1204 if (unlikely(!flow)) {
1206 goto err_unlock_ovs;
1209 /* Update actions, if present. */
1211 old_acts = ovsl_dereference(flow->sf_acts);
1212 rcu_assign_pointer(flow->sf_acts, acts);
1214 if (unlikely(reply)) {
1215 error = ovs_flow_cmd_fill_info(flow,
1216 ovs_header->dp_ifindex,
1217 reply, info->snd_portid,
1224 /* Could not alloc without acts before locking. */
1225 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex,
1226 info, OVS_FLOW_CMD_SET, false,
1229 if (IS_ERR(reply)) {
1230 error = PTR_ERR(reply);
1231 goto err_unlock_ovs;
1236 if (a[OVS_FLOW_ATTR_CLEAR])
1237 ovs_flow_stats_clear(flow);
1241 ovs_notify(&dp_flow_genl_family, reply, info);
1243 ovs_nla_free_flow_actions_rcu(old_acts);
1251 ovs_nla_free_flow_actions(acts);
1256 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
1258 struct nlattr **a = info->attrs;
1259 struct ovs_header *ovs_header = info->userhdr;
1260 struct net *net = sock_net(skb->sk);
1261 struct sw_flow_key key;
1262 struct sk_buff *reply;
1263 struct sw_flow *flow;
1264 struct datapath *dp;
1265 struct sw_flow_match match;
1266 struct sw_flow_id ufid;
1267 u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
1269 bool log = !a[OVS_FLOW_ATTR_PROBE];
1272 ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log);
1273 if (a[OVS_FLOW_ATTR_KEY]) {
1274 ovs_match_init(&match, &key, true, NULL);
1275 err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL,
1277 } else if (!ufid_present) {
1279 "Flow get message rejected, Key attribute missing.");
1286 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1293 flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid);
1295 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
1301 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info,
1302 OVS_FLOW_CMD_GET, true, ufid_flags);
1303 if (IS_ERR(reply)) {
1304 err = PTR_ERR(reply);
1309 return genlmsg_reply(reply, info);
1315 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
1317 struct nlattr **a = info->attrs;
1318 struct ovs_header *ovs_header = info->userhdr;
1319 struct net *net = sock_net(skb->sk);
1320 struct sw_flow_key key;
1321 struct sk_buff *reply;
1322 struct sw_flow *flow = NULL;
1323 struct datapath *dp;
1324 struct sw_flow_match match;
1325 struct sw_flow_id ufid;
1326 u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
1328 bool log = !a[OVS_FLOW_ATTR_PROBE];
1331 ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log);
1332 if (a[OVS_FLOW_ATTR_KEY]) {
1333 ovs_match_init(&match, &key, true, NULL);
1334 err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY],
1341 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1342 if (unlikely(!dp)) {
1347 if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) {
1348 err = ovs_flow_tbl_flush(&dp->table);
1353 flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid);
1355 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
1356 if (unlikely(!flow)) {
1361 ovs_flow_tbl_remove(&dp->table, flow);
1364 reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts,
1365 &flow->id, info, false, ufid_flags);
1366 if (likely(reply)) {
1367 if (!IS_ERR(reply)) {
1368 rcu_read_lock(); /*To keep RCU checker happy. */
1369 err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex,
1370 reply, info->snd_portid,
1377 ovs_notify(&dp_flow_genl_family, reply, info);
1379 netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply));
1383 ovs_flow_free(flow, true);
1390 static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1392 struct nlattr *a[__OVS_FLOW_ATTR_MAX];
1393 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1394 struct table_instance *ti;
1395 struct datapath *dp;
1399 err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a,
1400 OVS_FLOW_ATTR_MAX, flow_policy, NULL);
1403 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
1406 dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex);
1412 ti = rcu_dereference(dp->table.ti);
1414 struct sw_flow *flow;
1417 bucket = cb->args[0];
1419 flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj);
1423 if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb,
1424 NETLINK_CB(cb->skb).portid,
1425 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1426 OVS_FLOW_CMD_GET, ufid_flags) < 0)
1429 cb->args[0] = bucket;
1436 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
1437 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
1438 [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED },
1439 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
1440 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
1441 [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG },
1442 [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 },
1443 [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 },
1446 static const struct genl_ops dp_flow_genl_ops[] = {
1447 { .cmd = OVS_FLOW_CMD_NEW,
1448 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1449 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1450 .doit = ovs_flow_cmd_new
1452 { .cmd = OVS_FLOW_CMD_DEL,
1453 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1454 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1455 .doit = ovs_flow_cmd_del
1457 { .cmd = OVS_FLOW_CMD_GET,
1458 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1459 .flags = 0, /* OK for unprivileged users. */
1460 .doit = ovs_flow_cmd_get,
1461 .dumpit = ovs_flow_cmd_dump
1463 { .cmd = OVS_FLOW_CMD_SET,
1464 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1465 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1466 .doit = ovs_flow_cmd_set,
1470 static struct genl_family dp_flow_genl_family __ro_after_init = {
1471 .hdrsize = sizeof(struct ovs_header),
1472 .name = OVS_FLOW_FAMILY,
1473 .version = OVS_FLOW_VERSION,
1474 .maxattr = OVS_FLOW_ATTR_MAX,
1475 .policy = flow_policy,
1477 .parallel_ops = true,
1478 .ops = dp_flow_genl_ops,
1479 .n_ops = ARRAY_SIZE(dp_flow_genl_ops),
1480 .mcgrps = &ovs_dp_flow_multicast_group,
1482 .module = THIS_MODULE,
1485 static size_t ovs_dp_cmd_msg_size(void)
1487 size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header));
1489 msgsize += nla_total_size(IFNAMSIZ);
1490 msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats));
1491 msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats));
1492 msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */
1497 /* Called with ovs_mutex. */
1498 static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
1499 u32 portid, u32 seq, u32 flags, u8 cmd)
1501 struct ovs_header *ovs_header;
1502 struct ovs_dp_stats dp_stats;
1503 struct ovs_dp_megaflow_stats dp_megaflow_stats;
1506 ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
1511 ovs_header->dp_ifindex = get_dpifindex(dp);
1513 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
1515 goto nla_put_failure;
1517 get_dp_stats(dp, &dp_stats, &dp_megaflow_stats);
1518 if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats),
1519 &dp_stats, OVS_DP_ATTR_PAD))
1520 goto nla_put_failure;
1522 if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS,
1523 sizeof(struct ovs_dp_megaflow_stats),
1524 &dp_megaflow_stats, OVS_DP_ATTR_PAD))
1525 goto nla_put_failure;
1527 if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features))
1528 goto nla_put_failure;
1530 genlmsg_end(skb, ovs_header);
1534 genlmsg_cancel(skb, ovs_header);
1539 static struct sk_buff *ovs_dp_cmd_alloc_info(void)
1541 return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL);
1544 /* Called with rcu_read_lock or ovs_mutex. */
1545 static struct datapath *lookup_datapath(struct net *net,
1546 const struct ovs_header *ovs_header,
1547 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1549 struct datapath *dp;
1551 if (!a[OVS_DP_ATTR_NAME])
1552 dp = get_dp(net, ovs_header->dp_ifindex);
1554 struct vport *vport;
1556 vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
1557 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1559 return dp ? dp : ERR_PTR(-ENODEV);
1562 static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info)
1564 struct datapath *dp;
1566 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1570 WARN(dp->user_features, "Dropping previously announced user features\n");
1571 dp->user_features = 0;
1574 DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support);
1576 static int ovs_dp_change(struct datapath *dp, struct nlattr *a[])
1578 u32 user_features = 0;
1580 if (a[OVS_DP_ATTR_USER_FEATURES]) {
1581 user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]);
1583 if (user_features & ~(OVS_DP_F_VPORT_PIDS |
1584 OVS_DP_F_UNALIGNED |
1585 OVS_DP_F_TC_RECIRC_SHARING))
1588 #if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
1589 if (user_features & OVS_DP_F_TC_RECIRC_SHARING)
1594 dp->user_features = user_features;
1596 if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING)
1597 static_branch_enable(&tc_recirc_sharing_support);
1599 static_branch_disable(&tc_recirc_sharing_support);
1604 static int ovs_dp_stats_init(struct datapath *dp)
1606 dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu);
1607 if (!dp->stats_percpu)
1613 static int ovs_dp_vport_init(struct datapath *dp)
1617 dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS,
1618 sizeof(struct hlist_head),
1623 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
1624 INIT_HLIST_HEAD(&dp->ports[i]);
1629 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1631 struct nlattr **a = info->attrs;
1632 struct vport_parms parms;
1633 struct sk_buff *reply;
1634 struct datapath *dp;
1635 struct vport *vport;
1636 struct ovs_net *ovs_net;
1640 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1643 reply = ovs_dp_cmd_alloc_info();
1648 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1650 goto err_destroy_reply;
1652 ovs_dp_set_net(dp, sock_net(skb->sk));
1654 /* Allocate table. */
1655 err = ovs_flow_tbl_init(&dp->table);
1657 goto err_destroy_dp;
1659 err = ovs_dp_stats_init(dp);
1661 goto err_destroy_table;
1663 err = ovs_dp_vport_init(dp);
1665 goto err_destroy_stats;
1667 err = ovs_meters_init(dp);
1669 goto err_destroy_ports;
1671 /* Set up our datapath device. */
1672 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1673 parms.type = OVS_VPORT_TYPE_INTERNAL;
1674 parms.options = NULL;
1676 parms.port_no = OVSP_LOCAL;
1677 parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID];
1679 err = ovs_dp_change(dp, a);
1681 goto err_destroy_meters;
1683 /* So far only local changes have been made, now need the lock. */
1686 vport = new_vport(&parms);
1687 if (IS_ERR(vport)) {
1688 err = PTR_ERR(vport);
1692 if (err == -EEXIST) {
1693 /* An outdated user space instance that does not understand
1694 * the concept of user_features has attempted to create a new
1695 * datapath and is likely to reuse it. Drop all user features.
1697 if (info->genlhdr->version < OVS_DP_VER_FEATURES)
1698 ovs_dp_reset_user_features(skb, info);
1702 goto err_destroy_meters;
1705 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1706 info->snd_seq, 0, OVS_DP_CMD_NEW);
1709 ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
1710 list_add_tail_rcu(&dp->list_node, &ovs_net->dps);
1714 ovs_notify(&dp_datapath_genl_family, reply, info);
1718 ovs_meters_exit(dp);
1722 free_percpu(dp->stats_percpu);
1724 ovs_flow_tbl_destroy(&dp->table);
1733 /* Called with ovs_mutex. */
1734 static void __dp_destroy(struct datapath *dp)
1738 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
1739 struct vport *vport;
1740 struct hlist_node *n;
1742 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node)
1743 if (vport->port_no != OVSP_LOCAL)
1744 ovs_dp_detach_port(vport);
1747 list_del_rcu(&dp->list_node);
1749 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1750 * all ports in datapath are destroyed first before freeing datapath.
1752 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
1754 /* RCU destroy the flow table */
1755 call_rcu(&dp->rcu, destroy_dp_rcu);
1758 static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1760 struct sk_buff *reply;
1761 struct datapath *dp;
1764 reply = ovs_dp_cmd_alloc_info();
1769 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1772 goto err_unlock_free;
1774 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1775 info->snd_seq, 0, OVS_DP_CMD_DEL);
1781 ovs_notify(&dp_datapath_genl_family, reply, info);
1791 static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1793 struct sk_buff *reply;
1794 struct datapath *dp;
1797 reply = ovs_dp_cmd_alloc_info();
1802 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1805 goto err_unlock_free;
1807 err = ovs_dp_change(dp, info->attrs);
1809 goto err_unlock_free;
1811 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1812 info->snd_seq, 0, OVS_DP_CMD_SET);
1816 ovs_notify(&dp_datapath_genl_family, reply, info);
1826 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1828 struct sk_buff *reply;
1829 struct datapath *dp;
1832 reply = ovs_dp_cmd_alloc_info();
1837 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1840 goto err_unlock_free;
1842 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1843 info->snd_seq, 0, OVS_DP_CMD_GET);
1847 return genlmsg_reply(reply, info);
1855 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1857 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
1858 struct datapath *dp;
1859 int skip = cb->args[0];
1863 list_for_each_entry(dp, &ovs_net->dps, list_node) {
1865 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
1866 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1867 OVS_DP_CMD_GET) < 0)
1878 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1879 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1880 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1881 [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
1884 static const struct genl_ops dp_datapath_genl_ops[] = {
1885 { .cmd = OVS_DP_CMD_NEW,
1886 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1887 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1888 .doit = ovs_dp_cmd_new
1890 { .cmd = OVS_DP_CMD_DEL,
1891 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1892 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1893 .doit = ovs_dp_cmd_del
1895 { .cmd = OVS_DP_CMD_GET,
1896 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1897 .flags = 0, /* OK for unprivileged users. */
1898 .doit = ovs_dp_cmd_get,
1899 .dumpit = ovs_dp_cmd_dump
1901 { .cmd = OVS_DP_CMD_SET,
1902 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1903 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1904 .doit = ovs_dp_cmd_set,
1908 static struct genl_family dp_datapath_genl_family __ro_after_init = {
1909 .hdrsize = sizeof(struct ovs_header),
1910 .name = OVS_DATAPATH_FAMILY,
1911 .version = OVS_DATAPATH_VERSION,
1912 .maxattr = OVS_DP_ATTR_MAX,
1913 .policy = datapath_policy,
1915 .parallel_ops = true,
1916 .ops = dp_datapath_genl_ops,
1917 .n_ops = ARRAY_SIZE(dp_datapath_genl_ops),
1918 .mcgrps = &ovs_dp_datapath_multicast_group,
1920 .module = THIS_MODULE,
1923 /* Called with ovs_mutex or RCU read lock. */
1924 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
1925 struct net *net, u32 portid, u32 seq,
1926 u32 flags, u8 cmd, gfp_t gfp)
1928 struct ovs_header *ovs_header;
1929 struct ovs_vport_stats vport_stats;
1932 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
1937 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1939 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
1940 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
1941 nla_put_string(skb, OVS_VPORT_ATTR_NAME,
1942 ovs_vport_name(vport)) ||
1943 nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex))
1944 goto nla_put_failure;
1946 if (!net_eq(net, dev_net(vport->dev))) {
1947 int id = peernet2id_alloc(net, dev_net(vport->dev), gfp);
1949 if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id))
1950 goto nla_put_failure;
1953 ovs_vport_get_stats(vport, &vport_stats);
1954 if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS,
1955 sizeof(struct ovs_vport_stats), &vport_stats,
1956 OVS_VPORT_ATTR_PAD))
1957 goto nla_put_failure;
1959 if (ovs_vport_get_upcall_portids(vport, skb))
1960 goto nla_put_failure;
1962 err = ovs_vport_get_options(vport, skb);
1963 if (err == -EMSGSIZE)
1966 genlmsg_end(skb, ovs_header);
1972 genlmsg_cancel(skb, ovs_header);
1976 static struct sk_buff *ovs_vport_cmd_alloc_info(void)
1978 return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1981 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1982 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net,
1983 u32 portid, u32 seq, u8 cmd)
1985 struct sk_buff *skb;
1988 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1990 return ERR_PTR(-ENOMEM);
1992 retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd,
1999 /* Called with ovs_mutex or RCU read lock. */
2000 static struct vport *lookup_vport(struct net *net,
2001 const struct ovs_header *ovs_header,
2002 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
2004 struct datapath *dp;
2005 struct vport *vport;
2007 if (a[OVS_VPORT_ATTR_IFINDEX])
2008 return ERR_PTR(-EOPNOTSUPP);
2009 if (a[OVS_VPORT_ATTR_NAME]) {
2010 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
2012 return ERR_PTR(-ENODEV);
2013 if (ovs_header->dp_ifindex &&
2014 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
2015 return ERR_PTR(-ENODEV);
2017 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
2018 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
2020 if (port_no >= DP_MAX_PORTS)
2021 return ERR_PTR(-EFBIG);
2023 dp = get_dp(net, ovs_header->dp_ifindex);
2025 return ERR_PTR(-ENODEV);
2027 vport = ovs_vport_ovsl_rcu(dp, port_no);
2029 return ERR_PTR(-ENODEV);
2032 return ERR_PTR(-EINVAL);
2036 static unsigned int ovs_get_max_headroom(struct datapath *dp)
2038 unsigned int dev_headroom, max_headroom = 0;
2039 struct net_device *dev;
2040 struct vport *vport;
2043 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
2044 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
2046 dev_headroom = netdev_get_fwd_headroom(dev);
2047 if (dev_headroom > max_headroom)
2048 max_headroom = dev_headroom;
2052 return max_headroom;
2055 /* Called with ovs_mutex */
2056 static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom)
2058 struct vport *vport;
2061 dp->max_headroom = new_headroom;
2062 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
2063 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node)
2064 netdev_set_rx_headroom(vport->dev, new_headroom);
2067 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
2069 struct nlattr **a = info->attrs;
2070 struct ovs_header *ovs_header = info->userhdr;
2071 struct vport_parms parms;
2072 struct sk_buff *reply;
2073 struct vport *vport;
2074 struct datapath *dp;
2075 unsigned int new_headroom;
2079 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
2080 !a[OVS_VPORT_ATTR_UPCALL_PID])
2082 if (a[OVS_VPORT_ATTR_IFINDEX])
2085 port_no = a[OVS_VPORT_ATTR_PORT_NO]
2086 ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0;
2087 if (port_no >= DP_MAX_PORTS)
2090 reply = ovs_vport_cmd_alloc_info();
2096 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
2099 goto exit_unlock_free;
2102 vport = ovs_vport_ovsl(dp, port_no);
2105 goto exit_unlock_free;
2107 for (port_no = 1; ; port_no++) {
2108 if (port_no >= DP_MAX_PORTS) {
2110 goto exit_unlock_free;
2112 vport = ovs_vport_ovsl(dp, port_no);
2118 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
2119 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
2120 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
2122 parms.port_no = port_no;
2123 parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID];
2125 vport = new_vport(&parms);
2126 err = PTR_ERR(vport);
2127 if (IS_ERR(vport)) {
2130 goto exit_unlock_free;
2133 err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info),
2134 info->snd_portid, info->snd_seq, 0,
2135 OVS_VPORT_CMD_NEW, GFP_KERNEL);
2137 new_headroom = netdev_get_fwd_headroom(vport->dev);
2139 if (new_headroom > dp->max_headroom)
2140 ovs_update_headroom(dp, new_headroom);
2142 netdev_set_rx_headroom(vport->dev, dp->max_headroom);
2147 ovs_notify(&dp_vport_genl_family, reply, info);
2156 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
2158 struct nlattr **a = info->attrs;
2159 struct sk_buff *reply;
2160 struct vport *vport;
2163 reply = ovs_vport_cmd_alloc_info();
2168 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
2169 err = PTR_ERR(vport);
2171 goto exit_unlock_free;
2173 if (a[OVS_VPORT_ATTR_TYPE] &&
2174 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
2176 goto exit_unlock_free;
2179 if (a[OVS_VPORT_ATTR_OPTIONS]) {
2180 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
2182 goto exit_unlock_free;
2186 if (a[OVS_VPORT_ATTR_UPCALL_PID]) {
2187 struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID];
2189 err = ovs_vport_set_upcall_portids(vport, ids);
2191 goto exit_unlock_free;
2194 err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info),
2195 info->snd_portid, info->snd_seq, 0,
2196 OVS_VPORT_CMD_SET, GFP_KERNEL);
2200 ovs_notify(&dp_vport_genl_family, reply, info);
2209 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
2211 bool update_headroom = false;
2212 struct nlattr **a = info->attrs;
2213 struct sk_buff *reply;
2214 struct datapath *dp;
2215 struct vport *vport;
2216 unsigned int new_headroom;
2219 reply = ovs_vport_cmd_alloc_info();
2224 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
2225 err = PTR_ERR(vport);
2227 goto exit_unlock_free;
2229 if (vport->port_no == OVSP_LOCAL) {
2231 goto exit_unlock_free;
2234 err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info),
2235 info->snd_portid, info->snd_seq, 0,
2236 OVS_VPORT_CMD_DEL, GFP_KERNEL);
2239 /* the vport deletion may trigger dp headroom update */
2241 if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom)
2242 update_headroom = true;
2244 netdev_reset_rx_headroom(vport->dev);
2245 ovs_dp_detach_port(vport);
2247 if (update_headroom) {
2248 new_headroom = ovs_get_max_headroom(dp);
2250 if (new_headroom < dp->max_headroom)
2251 ovs_update_headroom(dp, new_headroom);
2255 ovs_notify(&dp_vport_genl_family, reply, info);
2264 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
2266 struct nlattr **a = info->attrs;
2267 struct ovs_header *ovs_header = info->userhdr;
2268 struct sk_buff *reply;
2269 struct vport *vport;
2272 reply = ovs_vport_cmd_alloc_info();
2277 vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
2278 err = PTR_ERR(vport);
2280 goto exit_unlock_free;
2281 err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info),
2282 info->snd_portid, info->snd_seq, 0,
2283 OVS_VPORT_CMD_GET, GFP_ATOMIC);
2287 return genlmsg_reply(reply, info);
2295 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
2297 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
2298 struct datapath *dp;
2299 int bucket = cb->args[0], skip = cb->args[1];
2303 dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex);
2308 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
2309 struct vport *vport;
2312 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
2314 ovs_vport_cmd_fill_info(vport, skb,
2316 NETLINK_CB(cb->skb).portid,
2336 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
2337 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
2338 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
2339 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
2340 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
2341 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_UNSPEC },
2342 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
2343 [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 },
2344 [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 },
2347 static const struct genl_ops dp_vport_genl_ops[] = {
2348 { .cmd = OVS_VPORT_CMD_NEW,
2349 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2350 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
2351 .doit = ovs_vport_cmd_new
2353 { .cmd = OVS_VPORT_CMD_DEL,
2354 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2355 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
2356 .doit = ovs_vport_cmd_del
2358 { .cmd = OVS_VPORT_CMD_GET,
2359 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2360 .flags = 0, /* OK for unprivileged users. */
2361 .doit = ovs_vport_cmd_get,
2362 .dumpit = ovs_vport_cmd_dump
2364 { .cmd = OVS_VPORT_CMD_SET,
2365 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2366 .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
2367 .doit = ovs_vport_cmd_set,
2371 struct genl_family dp_vport_genl_family __ro_after_init = {
2372 .hdrsize = sizeof(struct ovs_header),
2373 .name = OVS_VPORT_FAMILY,
2374 .version = OVS_VPORT_VERSION,
2375 .maxattr = OVS_VPORT_ATTR_MAX,
2376 .policy = vport_policy,
2378 .parallel_ops = true,
2379 .ops = dp_vport_genl_ops,
2380 .n_ops = ARRAY_SIZE(dp_vport_genl_ops),
2381 .mcgrps = &ovs_dp_vport_multicast_group,
2383 .module = THIS_MODULE,
2386 static struct genl_family * const dp_genl_families[] = {
2387 &dp_datapath_genl_family,
2388 &dp_vport_genl_family,
2389 &dp_flow_genl_family,
2390 &dp_packet_genl_family,
2391 &dp_meter_genl_family,
2392 #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT)
2393 &dp_ct_limit_genl_family,
2397 static void dp_unregister_genl(int n_families)
2401 for (i = 0; i < n_families; i++)
2402 genl_unregister_family(dp_genl_families[i]);
2405 static int __init dp_register_genl(void)
2410 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
2412 err = genl_register_family(dp_genl_families[i]);
2420 dp_unregister_genl(i);
2424 static int __net_init ovs_init_net(struct net *net)
2426 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2428 INIT_LIST_HEAD(&ovs_net->dps);
2429 INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
2430 return ovs_ct_init(net);
2433 static void __net_exit list_vports_from_net(struct net *net, struct net *dnet,
2434 struct list_head *head)
2436 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2437 struct datapath *dp;
2439 list_for_each_entry(dp, &ovs_net->dps, list_node) {
2442 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
2443 struct vport *vport;
2445 hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) {
2446 if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL)
2449 if (dev_net(vport->dev) == dnet)
2450 list_add(&vport->detach_list, head);
2456 static void __net_exit ovs_exit_net(struct net *dnet)
2458 struct datapath *dp, *dp_next;
2459 struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id);
2460 struct vport *vport, *vport_next;
2466 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
2469 down_read(&net_rwsem);
2471 list_vports_from_net(net, dnet, &head);
2472 up_read(&net_rwsem);
2474 /* Detach all vports from given namespace. */
2475 list_for_each_entry_safe(vport, vport_next, &head, detach_list) {
2476 list_del(&vport->detach_list);
2477 ovs_dp_detach_port(vport);
2482 cancel_work_sync(&ovs_net->dp_notify_work);
2485 static struct pernet_operations ovs_net_ops = {
2486 .init = ovs_init_net,
2487 .exit = ovs_exit_net,
2489 .size = sizeof(struct ovs_net),
2492 static int __init dp_init(void)
2496 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
2498 pr_info("Open vSwitch switching datapath\n");
2500 err = action_fifos_init();
2504 err = ovs_internal_dev_rtnl_link_register();
2506 goto error_action_fifos_exit;
2508 err = ovs_flow_init();
2510 goto error_unreg_rtnl_link;
2512 err = ovs_vport_init();
2514 goto error_flow_exit;
2516 err = register_pernet_device(&ovs_net_ops);
2518 goto error_vport_exit;
2520 err = register_netdevice_notifier(&ovs_dp_device_notifier);
2522 goto error_netns_exit;
2524 err = ovs_netdev_init();
2526 goto error_unreg_notifier;
2528 err = dp_register_genl();
2530 goto error_unreg_netdev;
2536 error_unreg_notifier:
2537 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2539 unregister_pernet_device(&ovs_net_ops);
2544 error_unreg_rtnl_link:
2545 ovs_internal_dev_rtnl_link_unregister();
2546 error_action_fifos_exit:
2547 action_fifos_exit();
2552 static void dp_cleanup(void)
2554 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
2556 unregister_netdevice_notifier(&ovs_dp_device_notifier);
2557 unregister_pernet_device(&ovs_net_ops);
2561 ovs_internal_dev_rtnl_link_unregister();
2562 action_fifos_exit();
2565 module_init(dp_init);
2566 module_exit(dp_cleanup);
2568 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2569 MODULE_LICENSE("GPL");
2570 MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY);
2571 MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY);
2572 MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY);
2573 MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY);
2574 MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY);
2575 MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY);