2 * Copyright (c) 2007-2014 Nicira, Inc.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21 #include <linux/init.h>
22 #include <linux/module.h>
23 #include <linux/if_arp.h>
24 #include <linux/if_vlan.h>
27 #include <linux/jhash.h>
28 #include <linux/delay.h>
29 #include <linux/time.h>
30 #include <linux/etherdevice.h>
31 #include <linux/genetlink.h>
32 #include <linux/kernel.h>
33 #include <linux/kthread.h>
34 #include <linux/mutex.h>
35 #include <linux/percpu.h>
36 #include <linux/rcupdate.h>
37 #include <linux/tcp.h>
38 #include <linux/udp.h>
39 #include <linux/ethtool.h>
40 #include <linux/wait.h>
41 #include <asm/div64.h>
42 #include <linux/highmem.h>
43 #include <linux/netfilter_bridge.h>
44 #include <linux/netfilter_ipv4.h>
45 #include <linux/inetdevice.h>
46 #include <linux/list.h>
47 #include <linux/openvswitch.h>
48 #include <linux/rculist.h>
49 #include <linux/dmi.h>
50 #include <net/genetlink.h>
51 #include <net/net_namespace.h>
52 #include <net/netns/generic.h>
56 #include "flow_table.h"
57 #include "flow_netlink.h"
58 #include "vport-internal_dev.h"
59 #include "vport-netdev.h"
61 int ovs_net_id __read_mostly
;
62 EXPORT_SYMBOL_GPL(ovs_net_id
);
64 static struct genl_family dp_packet_genl_family
;
65 static struct genl_family dp_flow_genl_family
;
66 static struct genl_family dp_datapath_genl_family
;
68 static const struct nla_policy flow_policy
[];
70 static const struct genl_multicast_group ovs_dp_flow_multicast_group
= {
71 .name
= OVS_FLOW_MCGROUP
,
74 static const struct genl_multicast_group ovs_dp_datapath_multicast_group
= {
75 .name
= OVS_DATAPATH_MCGROUP
,
78 static const struct genl_multicast_group ovs_dp_vport_multicast_group
= {
79 .name
= OVS_VPORT_MCGROUP
,
82 /* Check if need to build a reply message.
83 * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */
84 static bool ovs_must_notify(struct genl_family
*family
, struct genl_info
*info
,
87 return info
->nlhdr
->nlmsg_flags
& NLM_F_ECHO
||
88 genl_has_listeners(family
, genl_info_net(info
), group
);
91 static void ovs_notify(struct genl_family
*family
,
92 struct sk_buff
*skb
, struct genl_info
*info
)
94 genl_notify(family
, skb
, genl_info_net(info
), info
->snd_portid
,
95 0, info
->nlhdr
, GFP_KERNEL
);
101 * All writes e.g. Writes to device state (add/remove datapath, port, set
102 * operations on vports, etc.), Writes to other state (flow table
103 * modifications, set miscellaneous datapath parameters, etc.) are protected
106 * Reads are protected by RCU.
108 * There are a few special cases (mostly stats) that have their own
109 * synchronization but they nest under all of above and don't interact with
112 * The RTNL lock nests inside ovs_mutex.
115 static DEFINE_MUTEX(ovs_mutex
);
119 mutex_lock(&ovs_mutex
);
122 void ovs_unlock(void)
124 mutex_unlock(&ovs_mutex
);
127 #ifdef CONFIG_LOCKDEP
128 int lockdep_ovsl_is_held(void)
131 return lockdep_is_held(&ovs_mutex
);
135 EXPORT_SYMBOL_GPL(lockdep_ovsl_is_held
);
138 static struct vport
*new_vport(const struct vport_parms
*);
139 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*,
140 const struct sw_flow_key
*,
141 const struct dp_upcall_info
*);
142 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*,
143 const struct sw_flow_key
*,
144 const struct dp_upcall_info
*);
146 /* Must be called with rcu_read_lock. */
147 static struct datapath
*get_dp_rcu(struct net
*net
, int dp_ifindex
)
149 struct net_device
*dev
= dev_get_by_index_rcu(net
, dp_ifindex
);
152 struct vport
*vport
= ovs_internal_dev_get_vport(dev
);
160 /* The caller must hold either ovs_mutex or rcu_read_lock to keep the
161 * returned dp pointer valid.
163 static inline struct datapath
*get_dp(struct net
*net
, int dp_ifindex
)
167 WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
169 dp
= get_dp_rcu(net
, dp_ifindex
);
175 /* Must be called with rcu_read_lock or ovs_mutex. */
176 const char *ovs_dp_name(const struct datapath
*dp
)
178 struct vport
*vport
= ovs_vport_ovsl_rcu(dp
, OVSP_LOCAL
);
179 return ovs_vport_name(vport
);
182 static int get_dpifindex(const struct datapath
*dp
)
189 local
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
191 ifindex
= local
->dev
->ifindex
;
200 static void destroy_dp_rcu(struct rcu_head
*rcu
)
202 struct datapath
*dp
= container_of(rcu
, struct datapath
, rcu
);
204 ovs_flow_tbl_destroy(&dp
->table
);
205 free_percpu(dp
->stats_percpu
);
210 static struct hlist_head
*vport_hash_bucket(const struct datapath
*dp
,
213 return &dp
->ports
[port_no
& (DP_VPORT_HASH_BUCKETS
- 1)];
216 /* Called with ovs_mutex or RCU read lock. */
217 struct vport
*ovs_lookup_vport(const struct datapath
*dp
, u16 port_no
)
220 struct hlist_head
*head
;
222 head
= vport_hash_bucket(dp
, port_no
);
223 hlist_for_each_entry_rcu(vport
, head
, dp_hash_node
) {
224 if (vport
->port_no
== port_no
)
230 /* Called with ovs_mutex. */
231 static struct vport
*new_vport(const struct vport_parms
*parms
)
235 vport
= ovs_vport_add(parms
);
236 if (!IS_ERR(vport
)) {
237 struct datapath
*dp
= parms
->dp
;
238 struct hlist_head
*head
= vport_hash_bucket(dp
, vport
->port_no
);
240 hlist_add_head_rcu(&vport
->dp_hash_node
, head
);
245 void ovs_dp_detach_port(struct vport
*p
)
249 /* First drop references to device. */
250 hlist_del_rcu(&p
->dp_hash_node
);
252 /* Then destroy it. */
256 /* Must be called with rcu_read_lock. */
257 void ovs_dp_process_packet(struct sk_buff
*skb
, struct sw_flow_key
*key
)
259 const struct vport
*p
= OVS_CB(skb
)->input_vport
;
260 struct datapath
*dp
= p
->dp
;
261 struct sw_flow
*flow
;
262 struct sw_flow_actions
*sf_acts
;
263 struct dp_stats_percpu
*stats
;
267 stats
= this_cpu_ptr(dp
->stats_percpu
);
270 flow
= ovs_flow_tbl_lookup_stats(&dp
->table
, key
, &n_mask_hit
);
271 if (unlikely(!flow
)) {
272 struct dp_upcall_info upcall
;
275 memset(&upcall
, 0, sizeof(upcall
));
276 upcall
.cmd
= OVS_PACKET_CMD_MISS
;
277 upcall
.portid
= ovs_vport_find_upcall_portid(p
, skb
);
278 upcall
.mru
= OVS_CB(skb
)->mru
;
279 error
= ovs_dp_upcall(dp
, skb
, key
, &upcall
);
284 stats_counter
= &stats
->n_missed
;
288 ovs_flow_stats_update(flow
, key
->tp
.flags
, skb
);
289 sf_acts
= rcu_dereference(flow
->sf_acts
);
290 ovs_execute_actions(dp
, skb
, sf_acts
, key
);
292 stats_counter
= &stats
->n_hit
;
295 /* Update datapath statistics. */
296 u64_stats_update_begin(&stats
->syncp
);
298 stats
->n_mask_hit
+= n_mask_hit
;
299 u64_stats_update_end(&stats
->syncp
);
302 int ovs_dp_upcall(struct datapath
*dp
, struct sk_buff
*skb
,
303 const struct sw_flow_key
*key
,
304 const struct dp_upcall_info
*upcall_info
)
306 struct dp_stats_percpu
*stats
;
309 if (upcall_info
->portid
== 0) {
314 if (!skb_is_gso(skb
))
315 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
);
317 err
= queue_gso_packets(dp
, skb
, key
, upcall_info
);
324 stats
= this_cpu_ptr(dp
->stats_percpu
);
326 u64_stats_update_begin(&stats
->syncp
);
328 u64_stats_update_end(&stats
->syncp
);
333 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*skb
,
334 const struct sw_flow_key
*key
,
335 const struct dp_upcall_info
*upcall_info
)
337 unsigned short gso_type
= skb_shinfo(skb
)->gso_type
;
338 struct sw_flow_key later_key
;
339 struct sk_buff
*segs
, *nskb
;
340 struct ovs_skb_cb ovs_cb
;
343 ovs_cb
= *OVS_CB(skb
);
344 segs
= __skb_gso_segment(skb
, NETIF_F_SG
, false);
345 *OVS_CB(skb
) = ovs_cb
;
347 return PTR_ERR(segs
);
351 if (gso_type
& SKB_GSO_UDP
) {
352 /* The initial flow key extracted by ovs_flow_key_extract()
353 * in this case is for a first fragment, so we need to
354 * properly mark later fragments.
357 later_key
.ip
.frag
= OVS_FRAG_TYPE_LATER
;
360 /* Queue all of the segments. */
363 *OVS_CB(skb
) = ovs_cb
;
364 if (gso_type
& SKB_GSO_UDP
&& skb
!= segs
)
367 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
);
371 } while ((skb
= skb
->next
));
373 /* Free all of the segments. */
381 } while ((skb
= nskb
));
385 static size_t upcall_msg_size(const struct dp_upcall_info
*upcall_info
,
388 size_t size
= NLMSG_ALIGN(sizeof(struct ovs_header
))
389 + nla_total_size(hdrlen
) /* OVS_PACKET_ATTR_PACKET */
390 + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */
392 /* OVS_PACKET_ATTR_USERDATA */
393 if (upcall_info
->userdata
)
394 size
+= NLA_ALIGN(upcall_info
->userdata
->nla_len
);
396 /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */
397 if (upcall_info
->egress_tun_info
)
398 size
+= nla_total_size(ovs_tun_key_attr_size());
400 /* OVS_PACKET_ATTR_ACTIONS */
401 if (upcall_info
->actions_len
)
402 size
+= nla_total_size(upcall_info
->actions_len
);
404 /* OVS_PACKET_ATTR_MRU */
405 if (upcall_info
->mru
)
406 size
+= nla_total_size(sizeof(upcall_info
->mru
));
411 static void pad_packet(struct datapath
*dp
, struct sk_buff
*skb
)
413 if (!(dp
->user_features
& OVS_DP_F_UNALIGNED
)) {
414 size_t plen
= NLA_ALIGN(skb
->len
) - skb
->len
;
417 memset(skb_put(skb
, plen
), 0, plen
);
421 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*skb
,
422 const struct sw_flow_key
*key
,
423 const struct dp_upcall_info
*upcall_info
)
425 struct ovs_header
*upcall
;
426 struct sk_buff
*nskb
= NULL
;
427 struct sk_buff
*user_skb
= NULL
; /* to be queued to userspace */
429 struct genl_info info
= {
430 .dst_sk
= ovs_dp_get_net(dp
)->genl_sock
,
431 .snd_portid
= upcall_info
->portid
,
437 dp_ifindex
= get_dpifindex(dp
);
441 if (skb_vlan_tag_present(skb
)) {
442 nskb
= skb_clone(skb
, GFP_ATOMIC
);
446 nskb
= __vlan_hwaccel_push_inside(nskb
);
453 if (nla_attr_size(skb
->len
) > USHRT_MAX
) {
458 /* Complete checksum if needed */
459 if (skb
->ip_summed
== CHECKSUM_PARTIAL
&&
460 (err
= skb_checksum_help(skb
)))
463 /* Older versions of OVS user space enforce alignment of the last
464 * Netlink attribute to NLA_ALIGNTO which would require extensive
465 * padding logic. Only perform zerocopy if padding is not required.
467 if (dp
->user_features
& OVS_DP_F_UNALIGNED
)
468 hlen
= skb_zerocopy_headlen(skb
);
472 len
= upcall_msg_size(upcall_info
, hlen
);
473 user_skb
= genlmsg_new_unicast(len
, &info
, GFP_ATOMIC
);
479 upcall
= genlmsg_put(user_skb
, 0, 0, &dp_packet_genl_family
,
480 0, upcall_info
->cmd
);
481 upcall
->dp_ifindex
= dp_ifindex
;
483 err
= ovs_nla_put_key(key
, key
, OVS_PACKET_ATTR_KEY
, false, user_skb
);
486 if (upcall_info
->userdata
)
487 __nla_put(user_skb
, OVS_PACKET_ATTR_USERDATA
,
488 nla_len(upcall_info
->userdata
),
489 nla_data(upcall_info
->userdata
));
491 if (upcall_info
->egress_tun_info
) {
492 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_EGRESS_TUN_KEY
);
493 err
= ovs_nla_put_egress_tunnel_key(user_skb
,
494 upcall_info
->egress_tun_info
,
495 upcall_info
->egress_tun_opts
);
497 nla_nest_end(user_skb
, nla
);
500 if (upcall_info
->actions_len
) {
501 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_ACTIONS
);
502 err
= ovs_nla_put_actions(upcall_info
->actions
,
503 upcall_info
->actions_len
,
506 nla_nest_end(user_skb
, nla
);
508 nla_nest_cancel(user_skb
, nla
);
511 /* Add OVS_PACKET_ATTR_MRU */
512 if (upcall_info
->mru
) {
513 if (nla_put_u16(user_skb
, OVS_PACKET_ATTR_MRU
,
518 pad_packet(dp
, user_skb
);
521 /* Only reserve room for attribute header, packet data is added
522 * in skb_zerocopy() */
523 if (!(nla
= nla_reserve(user_skb
, OVS_PACKET_ATTR_PACKET
, 0))) {
527 nla
->nla_len
= nla_attr_size(skb
->len
);
529 err
= skb_zerocopy(user_skb
, skb
, skb
->len
, hlen
);
533 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
534 pad_packet(dp
, user_skb
);
536 ((struct nlmsghdr
*) user_skb
->data
)->nlmsg_len
= user_skb
->len
;
538 err
= genlmsg_unicast(ovs_dp_get_net(dp
), user_skb
, upcall_info
->portid
);
548 static int ovs_packet_cmd_execute(struct sk_buff
*skb
, struct genl_info
*info
)
550 struct ovs_header
*ovs_header
= info
->userhdr
;
551 struct net
*net
= sock_net(skb
->sk
);
552 struct nlattr
**a
= info
->attrs
;
553 struct sw_flow_actions
*acts
;
554 struct sk_buff
*packet
;
555 struct sw_flow
*flow
;
556 struct sw_flow_actions
*sf_acts
;
559 struct vport
*input_vport
;
563 bool log
= !a
[OVS_PACKET_ATTR_PROBE
];
566 if (!a
[OVS_PACKET_ATTR_PACKET
] || !a
[OVS_PACKET_ATTR_KEY
] ||
567 !a
[OVS_PACKET_ATTR_ACTIONS
])
570 len
= nla_len(a
[OVS_PACKET_ATTR_PACKET
]);
571 packet
= __dev_alloc_skb(NET_IP_ALIGN
+ len
, GFP_KERNEL
);
575 skb_reserve(packet
, NET_IP_ALIGN
);
577 nla_memcpy(__skb_put(packet
, len
), a
[OVS_PACKET_ATTR_PACKET
], len
);
579 skb_reset_mac_header(packet
);
580 eth
= eth_hdr(packet
);
582 /* Normally, setting the skb 'protocol' field would be handled by a
583 * call to eth_type_trans(), but it assumes there's a sending
584 * device, which we may not have. */
585 if (eth_proto_is_802_3(eth
->h_proto
))
586 packet
->protocol
= eth
->h_proto
;
588 packet
->protocol
= htons(ETH_P_802_2
);
590 /* Set packet's mru */
591 if (a
[OVS_PACKET_ATTR_MRU
]) {
592 mru
= nla_get_u16(a
[OVS_PACKET_ATTR_MRU
]);
593 packet
->ignore_df
= 1;
595 OVS_CB(packet
)->mru
= mru
;
597 /* Build an sw_flow for sending this packet. */
598 flow
= ovs_flow_alloc();
603 err
= ovs_flow_key_extract_userspace(net
, a
[OVS_PACKET_ATTR_KEY
],
604 packet
, &flow
->key
, log
);
608 err
= ovs_nla_copy_actions(net
, a
[OVS_PACKET_ATTR_ACTIONS
],
609 &flow
->key
, &acts
, log
);
613 rcu_assign_pointer(flow
->sf_acts
, acts
);
614 packet
->priority
= flow
->key
.phy
.priority
;
615 packet
->mark
= flow
->key
.phy
.skb_mark
;
618 dp
= get_dp_rcu(net
, ovs_header
->dp_ifindex
);
623 input_vport
= ovs_vport_rcu(dp
, flow
->key
.phy
.in_port
);
625 input_vport
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
630 packet
->dev
= input_vport
->dev
;
631 OVS_CB(packet
)->input_vport
= input_vport
;
632 sf_acts
= rcu_dereference(flow
->sf_acts
);
635 err
= ovs_execute_actions(dp
, packet
, sf_acts
, &flow
->key
);
639 ovs_flow_free(flow
, false);
645 ovs_flow_free(flow
, false);
652 static const struct nla_policy packet_policy
[OVS_PACKET_ATTR_MAX
+ 1] = {
653 [OVS_PACKET_ATTR_PACKET
] = { .len
= ETH_HLEN
},
654 [OVS_PACKET_ATTR_KEY
] = { .type
= NLA_NESTED
},
655 [OVS_PACKET_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
656 [OVS_PACKET_ATTR_PROBE
] = { .type
= NLA_FLAG
},
657 [OVS_PACKET_ATTR_MRU
] = { .type
= NLA_U16
},
660 static const struct genl_ops dp_packet_genl_ops
[] = {
661 { .cmd
= OVS_PACKET_CMD_EXECUTE
,
662 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
663 .policy
= packet_policy
,
664 .doit
= ovs_packet_cmd_execute
668 static struct genl_family dp_packet_genl_family
= {
669 .id
= GENL_ID_GENERATE
,
670 .hdrsize
= sizeof(struct ovs_header
),
671 .name
= OVS_PACKET_FAMILY
,
672 .version
= OVS_PACKET_VERSION
,
673 .maxattr
= OVS_PACKET_ATTR_MAX
,
675 .parallel_ops
= true,
676 .ops
= dp_packet_genl_ops
,
677 .n_ops
= ARRAY_SIZE(dp_packet_genl_ops
),
680 static void get_dp_stats(const struct datapath
*dp
, struct ovs_dp_stats
*stats
,
681 struct ovs_dp_megaflow_stats
*mega_stats
)
685 memset(mega_stats
, 0, sizeof(*mega_stats
));
687 stats
->n_flows
= ovs_flow_tbl_count(&dp
->table
);
688 mega_stats
->n_masks
= ovs_flow_tbl_num_masks(&dp
->table
);
690 stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
692 for_each_possible_cpu(i
) {
693 const struct dp_stats_percpu
*percpu_stats
;
694 struct dp_stats_percpu local_stats
;
697 percpu_stats
= per_cpu_ptr(dp
->stats_percpu
, i
);
700 start
= u64_stats_fetch_begin_irq(&percpu_stats
->syncp
);
701 local_stats
= *percpu_stats
;
702 } while (u64_stats_fetch_retry_irq(&percpu_stats
->syncp
, start
));
704 stats
->n_hit
+= local_stats
.n_hit
;
705 stats
->n_missed
+= local_stats
.n_missed
;
706 stats
->n_lost
+= local_stats
.n_lost
;
707 mega_stats
->n_mask_hit
+= local_stats
.n_mask_hit
;
711 static bool should_fill_key(const struct sw_flow_id
*sfid
, uint32_t ufid_flags
)
713 return ovs_identifier_is_ufid(sfid
) &&
714 !(ufid_flags
& OVS_UFID_F_OMIT_KEY
);
717 static bool should_fill_mask(uint32_t ufid_flags
)
719 return !(ufid_flags
& OVS_UFID_F_OMIT_MASK
);
722 static bool should_fill_actions(uint32_t ufid_flags
)
724 return !(ufid_flags
& OVS_UFID_F_OMIT_ACTIONS
);
727 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions
*acts
,
728 const struct sw_flow_id
*sfid
,
731 size_t len
= NLMSG_ALIGN(sizeof(struct ovs_header
));
733 /* OVS_FLOW_ATTR_UFID */
734 if (sfid
&& ovs_identifier_is_ufid(sfid
))
735 len
+= nla_total_size(sfid
->ufid_len
);
737 /* OVS_FLOW_ATTR_KEY */
738 if (!sfid
|| should_fill_key(sfid
, ufid_flags
))
739 len
+= nla_total_size(ovs_key_attr_size());
741 /* OVS_FLOW_ATTR_MASK */
742 if (should_fill_mask(ufid_flags
))
743 len
+= nla_total_size(ovs_key_attr_size());
745 /* OVS_FLOW_ATTR_ACTIONS */
746 if (should_fill_actions(ufid_flags
))
747 len
+= nla_total_size(acts
->orig_len
);
750 + nla_total_size(sizeof(struct ovs_flow_stats
)) /* OVS_FLOW_ATTR_STATS */
751 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
752 + nla_total_size(8); /* OVS_FLOW_ATTR_USED */
755 /* Called with ovs_mutex or RCU read lock. */
756 static int ovs_flow_cmd_fill_stats(const struct sw_flow
*flow
,
759 struct ovs_flow_stats stats
;
763 ovs_flow_stats_get(flow
, &stats
, &used
, &tcp_flags
);
766 nla_put_u64(skb
, OVS_FLOW_ATTR_USED
, ovs_flow_used_time(used
)))
769 if (stats
.n_packets
&&
770 nla_put(skb
, OVS_FLOW_ATTR_STATS
, 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(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_unicast(len
, info
, 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,
912 static int ovs_flow_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
914 struct net
*net
= sock_net(skb
->sk
);
915 struct nlattr
**a
= info
->attrs
;
916 struct ovs_header
*ovs_header
= info
->userhdr
;
917 struct sw_flow
*flow
= NULL
, *new_flow
;
918 struct sw_flow_mask mask
;
919 struct sk_buff
*reply
;
921 struct sw_flow_key key
;
922 struct sw_flow_actions
*acts
;
923 struct sw_flow_match match
;
924 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
926 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
928 /* Must have key and actions. */
930 if (!a
[OVS_FLOW_ATTR_KEY
]) {
931 OVS_NLERR(log
, "Flow key attr not present in new flow.");
934 if (!a
[OVS_FLOW_ATTR_ACTIONS
]) {
935 OVS_NLERR(log
, "Flow actions attr not present in new flow.");
939 /* Most of the time we need to allocate a new flow, do it before
942 new_flow
= ovs_flow_alloc();
943 if (IS_ERR(new_flow
)) {
944 error
= PTR_ERR(new_flow
);
949 ovs_match_init(&match
, &key
, &mask
);
950 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
951 a
[OVS_FLOW_ATTR_MASK
], log
);
955 ovs_flow_mask_key(&new_flow
->key
, &key
, &mask
);
957 /* Extract flow identifier. */
958 error
= ovs_nla_get_identifier(&new_flow
->id
, a
[OVS_FLOW_ATTR_UFID
],
963 /* Validate actions. */
964 error
= ovs_nla_copy_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
],
965 &new_flow
->key
, &acts
, log
);
967 OVS_NLERR(log
, "Flow actions may not be safe on all matching packets.");
971 reply
= ovs_flow_cmd_alloc_info(acts
, &new_flow
->id
, info
, false,
974 error
= PTR_ERR(reply
);
979 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
985 /* Check if this is a duplicate flow */
986 if (ovs_identifier_is_ufid(&new_flow
->id
))
987 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &new_flow
->id
);
989 flow
= ovs_flow_tbl_lookup(&dp
->table
, &key
);
991 rcu_assign_pointer(new_flow
->sf_acts
, acts
);
993 /* Put flow in bucket. */
994 error
= ovs_flow_tbl_insert(&dp
->table
, new_flow
, &mask
);
995 if (unlikely(error
)) {
1000 if (unlikely(reply
)) {
1001 error
= ovs_flow_cmd_fill_info(new_flow
,
1002 ovs_header
->dp_ifindex
,
1003 reply
, info
->snd_portid
,
1011 struct sw_flow_actions
*old_acts
;
1013 /* Bail out if we're not allowed to modify an existing flow.
1014 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1015 * because Generic Netlink treats the latter as a dump
1016 * request. We also accept NLM_F_EXCL in case that bug ever
1019 if (unlikely(info
->nlhdr
->nlmsg_flags
& (NLM_F_CREATE
1022 goto err_unlock_ovs
;
1024 /* The flow identifier has to be the same for flow updates.
1025 * Look for any overlapping flow.
1027 if (unlikely(!ovs_flow_cmp(flow
, &match
))) {
1028 if (ovs_identifier_is_key(&flow
->id
))
1029 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
,
1031 else /* UFID matches but key is different */
1035 goto err_unlock_ovs
;
1038 /* Update actions. */
1039 old_acts
= ovsl_dereference(flow
->sf_acts
);
1040 rcu_assign_pointer(flow
->sf_acts
, acts
);
1042 if (unlikely(reply
)) {
1043 error
= ovs_flow_cmd_fill_info(flow
,
1044 ovs_header
->dp_ifindex
,
1045 reply
, info
->snd_portid
,
1053 ovs_nla_free_flow_actions_rcu(old_acts
);
1054 ovs_flow_free(new_flow
, false);
1058 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1065 ovs_nla_free_flow_actions(acts
);
1067 ovs_flow_free(new_flow
, false);
1072 /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */
1073 static struct sw_flow_actions
*get_flow_actions(struct net
*net
,
1074 const struct nlattr
*a
,
1075 const struct sw_flow_key
*key
,
1076 const struct sw_flow_mask
*mask
,
1079 struct sw_flow_actions
*acts
;
1080 struct sw_flow_key masked_key
;
1083 ovs_flow_mask_key(&masked_key
, key
, mask
);
1084 error
= ovs_nla_copy_actions(net
, a
, &masked_key
, &acts
, log
);
1087 "Actions may not be safe on all matching packets");
1088 return ERR_PTR(error
);
1094 static int ovs_flow_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1096 struct net
*net
= sock_net(skb
->sk
);
1097 struct nlattr
**a
= info
->attrs
;
1098 struct ovs_header
*ovs_header
= info
->userhdr
;
1099 struct sw_flow_key key
;
1100 struct sw_flow
*flow
;
1101 struct sw_flow_mask mask
;
1102 struct sk_buff
*reply
= NULL
;
1103 struct datapath
*dp
;
1104 struct sw_flow_actions
*old_acts
= NULL
, *acts
= NULL
;
1105 struct sw_flow_match match
;
1106 struct sw_flow_id sfid
;
1107 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1109 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1114 if (!a
[OVS_FLOW_ATTR_KEY
]) {
1115 OVS_NLERR(log
, "Flow key attribute not present in set flow.");
1119 ufid_present
= ovs_nla_get_ufid(&sfid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1120 ovs_match_init(&match
, &key
, &mask
);
1121 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1122 a
[OVS_FLOW_ATTR_MASK
], log
);
1126 /* Validate actions. */
1127 if (a
[OVS_FLOW_ATTR_ACTIONS
]) {
1128 acts
= get_flow_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
], &key
,
1131 error
= PTR_ERR(acts
);
1135 /* Can allocate before locking if have acts. */
1136 reply
= ovs_flow_cmd_alloc_info(acts
, &sfid
, info
, false,
1138 if (IS_ERR(reply
)) {
1139 error
= PTR_ERR(reply
);
1140 goto err_kfree_acts
;
1145 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1146 if (unlikely(!dp
)) {
1148 goto err_unlock_ovs
;
1150 /* Check that the flow exists. */
1152 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &sfid
);
1154 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1155 if (unlikely(!flow
)) {
1157 goto err_unlock_ovs
;
1160 /* Update actions, if present. */
1162 old_acts
= ovsl_dereference(flow
->sf_acts
);
1163 rcu_assign_pointer(flow
->sf_acts
, acts
);
1165 if (unlikely(reply
)) {
1166 error
= ovs_flow_cmd_fill_info(flow
,
1167 ovs_header
->dp_ifindex
,
1168 reply
, info
->snd_portid
,
1175 /* Could not alloc without acts before locking. */
1176 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
,
1177 info
, OVS_FLOW_CMD_NEW
, false,
1180 if (unlikely(IS_ERR(reply
))) {
1181 error
= PTR_ERR(reply
);
1182 goto err_unlock_ovs
;
1187 if (a
[OVS_FLOW_ATTR_CLEAR
])
1188 ovs_flow_stats_clear(flow
);
1192 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1194 ovs_nla_free_flow_actions_rcu(old_acts
);
1202 ovs_nla_free_flow_actions(acts
);
1207 static int ovs_flow_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1209 struct nlattr
**a
= info
->attrs
;
1210 struct ovs_header
*ovs_header
= info
->userhdr
;
1211 struct net
*net
= sock_net(skb
->sk
);
1212 struct sw_flow_key key
;
1213 struct sk_buff
*reply
;
1214 struct sw_flow
*flow
;
1215 struct datapath
*dp
;
1216 struct sw_flow_match match
;
1217 struct sw_flow_id ufid
;
1218 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1220 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1223 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1224 if (a
[OVS_FLOW_ATTR_KEY
]) {
1225 ovs_match_init(&match
, &key
, NULL
);
1226 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
], NULL
,
1228 } else if (!ufid_present
) {
1230 "Flow get message rejected, Key attribute missing.");
1237 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1244 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1246 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1252 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
, info
,
1253 OVS_FLOW_CMD_NEW
, true, ufid_flags
);
1254 if (IS_ERR(reply
)) {
1255 err
= PTR_ERR(reply
);
1260 return genlmsg_reply(reply
, info
);
1266 static int ovs_flow_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1268 struct nlattr
**a
= info
->attrs
;
1269 struct ovs_header
*ovs_header
= info
->userhdr
;
1270 struct net
*net
= sock_net(skb
->sk
);
1271 struct sw_flow_key key
;
1272 struct sk_buff
*reply
;
1273 struct sw_flow
*flow
= NULL
;
1274 struct datapath
*dp
;
1275 struct sw_flow_match match
;
1276 struct sw_flow_id ufid
;
1277 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1279 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1282 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1283 if (a
[OVS_FLOW_ATTR_KEY
]) {
1284 ovs_match_init(&match
, &key
, NULL
);
1285 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1292 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1293 if (unlikely(!dp
)) {
1298 if (unlikely(!a
[OVS_FLOW_ATTR_KEY
] && !ufid_present
)) {
1299 err
= ovs_flow_tbl_flush(&dp
->table
);
1304 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1306 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1307 if (unlikely(!flow
)) {
1312 ovs_flow_tbl_remove(&dp
->table
, flow
);
1315 reply
= ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force
*) flow
->sf_acts
,
1316 &flow
->id
, info
, false, ufid_flags
);
1317 if (likely(reply
)) {
1318 if (likely(!IS_ERR(reply
))) {
1319 rcu_read_lock(); /*To keep RCU checker happy. */
1320 err
= ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
,
1321 reply
, info
->snd_portid
,
1328 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1330 netlink_set_err(sock_net(skb
->sk
)->genl_sock
, 0, 0, PTR_ERR(reply
));
1334 ovs_flow_free(flow
, true);
1341 static int ovs_flow_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1343 struct nlattr
*a
[__OVS_FLOW_ATTR_MAX
];
1344 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1345 struct table_instance
*ti
;
1346 struct datapath
*dp
;
1350 err
= genlmsg_parse(cb
->nlh
, &dp_flow_genl_family
, a
,
1351 OVS_FLOW_ATTR_MAX
, flow_policy
);
1354 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1357 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1363 ti
= rcu_dereference(dp
->table
.ti
);
1365 struct sw_flow
*flow
;
1368 bucket
= cb
->args
[0];
1370 flow
= ovs_flow_tbl_dump_next(ti
, &bucket
, &obj
);
1374 if (ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
, skb
,
1375 NETLINK_CB(cb
->skb
).portid
,
1376 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1377 OVS_FLOW_CMD_NEW
, ufid_flags
) < 0)
1380 cb
->args
[0] = bucket
;
1387 static const struct nla_policy flow_policy
[OVS_FLOW_ATTR_MAX
+ 1] = {
1388 [OVS_FLOW_ATTR_KEY
] = { .type
= NLA_NESTED
},
1389 [OVS_FLOW_ATTR_MASK
] = { .type
= NLA_NESTED
},
1390 [OVS_FLOW_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
1391 [OVS_FLOW_ATTR_CLEAR
] = { .type
= NLA_FLAG
},
1392 [OVS_FLOW_ATTR_PROBE
] = { .type
= NLA_FLAG
},
1393 [OVS_FLOW_ATTR_UFID
] = { .type
= NLA_UNSPEC
, .len
= 1 },
1394 [OVS_FLOW_ATTR_UFID_FLAGS
] = { .type
= NLA_U32
},
1397 static const struct genl_ops dp_flow_genl_ops
[] = {
1398 { .cmd
= OVS_FLOW_CMD_NEW
,
1399 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1400 .policy
= flow_policy
,
1401 .doit
= ovs_flow_cmd_new
1403 { .cmd
= OVS_FLOW_CMD_DEL
,
1404 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1405 .policy
= flow_policy
,
1406 .doit
= ovs_flow_cmd_del
1408 { .cmd
= OVS_FLOW_CMD_GET
,
1409 .flags
= 0, /* OK for unprivileged users. */
1410 .policy
= flow_policy
,
1411 .doit
= ovs_flow_cmd_get
,
1412 .dumpit
= ovs_flow_cmd_dump
1414 { .cmd
= OVS_FLOW_CMD_SET
,
1415 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1416 .policy
= flow_policy
,
1417 .doit
= ovs_flow_cmd_set
,
1421 static struct genl_family dp_flow_genl_family
= {
1422 .id
= GENL_ID_GENERATE
,
1423 .hdrsize
= sizeof(struct ovs_header
),
1424 .name
= OVS_FLOW_FAMILY
,
1425 .version
= OVS_FLOW_VERSION
,
1426 .maxattr
= OVS_FLOW_ATTR_MAX
,
1428 .parallel_ops
= true,
1429 .ops
= dp_flow_genl_ops
,
1430 .n_ops
= ARRAY_SIZE(dp_flow_genl_ops
),
1431 .mcgrps
= &ovs_dp_flow_multicast_group
,
1435 static size_t ovs_dp_cmd_msg_size(void)
1437 size_t msgsize
= NLMSG_ALIGN(sizeof(struct ovs_header
));
1439 msgsize
+= nla_total_size(IFNAMSIZ
);
1440 msgsize
+= nla_total_size(sizeof(struct ovs_dp_stats
));
1441 msgsize
+= nla_total_size(sizeof(struct ovs_dp_megaflow_stats
));
1442 msgsize
+= nla_total_size(sizeof(u32
)); /* OVS_DP_ATTR_USER_FEATURES */
1447 /* Called with ovs_mutex. */
1448 static int ovs_dp_cmd_fill_info(struct datapath
*dp
, struct sk_buff
*skb
,
1449 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1451 struct ovs_header
*ovs_header
;
1452 struct ovs_dp_stats dp_stats
;
1453 struct ovs_dp_megaflow_stats dp_megaflow_stats
;
1456 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_datapath_genl_family
,
1461 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
1463 err
= nla_put_string(skb
, OVS_DP_ATTR_NAME
, ovs_dp_name(dp
));
1465 goto nla_put_failure
;
1467 get_dp_stats(dp
, &dp_stats
, &dp_megaflow_stats
);
1468 if (nla_put(skb
, OVS_DP_ATTR_STATS
, sizeof(struct ovs_dp_stats
),
1470 goto nla_put_failure
;
1472 if (nla_put(skb
, OVS_DP_ATTR_MEGAFLOW_STATS
,
1473 sizeof(struct ovs_dp_megaflow_stats
),
1474 &dp_megaflow_stats
))
1475 goto nla_put_failure
;
1477 if (nla_put_u32(skb
, OVS_DP_ATTR_USER_FEATURES
, dp
->user_features
))
1478 goto nla_put_failure
;
1480 genlmsg_end(skb
, ovs_header
);
1484 genlmsg_cancel(skb
, ovs_header
);
1489 static struct sk_buff
*ovs_dp_cmd_alloc_info(struct genl_info
*info
)
1491 return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info
, GFP_KERNEL
);
1494 /* Called with rcu_read_lock or ovs_mutex. */
1495 static struct datapath
*lookup_datapath(struct net
*net
,
1496 const struct ovs_header
*ovs_header
,
1497 struct nlattr
*a
[OVS_DP_ATTR_MAX
+ 1])
1499 struct datapath
*dp
;
1501 if (!a
[OVS_DP_ATTR_NAME
])
1502 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1504 struct vport
*vport
;
1506 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_DP_ATTR_NAME
]));
1507 dp
= vport
&& vport
->port_no
== OVSP_LOCAL
? vport
->dp
: NULL
;
1509 return dp
? dp
: ERR_PTR(-ENODEV
);
1512 static void ovs_dp_reset_user_features(struct sk_buff
*skb
, struct genl_info
*info
)
1514 struct datapath
*dp
;
1516 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1520 WARN(dp
->user_features
, "Dropping previously announced user features\n");
1521 dp
->user_features
= 0;
1524 static void ovs_dp_change(struct datapath
*dp
, struct nlattr
*a
[])
1526 if (a
[OVS_DP_ATTR_USER_FEATURES
])
1527 dp
->user_features
= nla_get_u32(a
[OVS_DP_ATTR_USER_FEATURES
]);
1530 static int ovs_dp_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1532 struct nlattr
**a
= info
->attrs
;
1533 struct vport_parms parms
;
1534 struct sk_buff
*reply
;
1535 struct datapath
*dp
;
1536 struct vport
*vport
;
1537 struct ovs_net
*ovs_net
;
1541 if (!a
[OVS_DP_ATTR_NAME
] || !a
[OVS_DP_ATTR_UPCALL_PID
])
1544 reply
= ovs_dp_cmd_alloc_info(info
);
1549 dp
= kzalloc(sizeof(*dp
), GFP_KERNEL
);
1551 goto err_free_reply
;
1553 ovs_dp_set_net(dp
, sock_net(skb
->sk
));
1555 /* Allocate table. */
1556 err
= ovs_flow_tbl_init(&dp
->table
);
1560 dp
->stats_percpu
= netdev_alloc_pcpu_stats(struct dp_stats_percpu
);
1561 if (!dp
->stats_percpu
) {
1563 goto err_destroy_table
;
1566 dp
->ports
= kmalloc(DP_VPORT_HASH_BUCKETS
* sizeof(struct hlist_head
),
1570 goto err_destroy_percpu
;
1573 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1574 INIT_HLIST_HEAD(&dp
->ports
[i
]);
1576 /* Set up our datapath device. */
1577 parms
.name
= nla_data(a
[OVS_DP_ATTR_NAME
]);
1578 parms
.type
= OVS_VPORT_TYPE_INTERNAL
;
1579 parms
.options
= NULL
;
1581 parms
.port_no
= OVSP_LOCAL
;
1582 parms
.upcall_portids
= a
[OVS_DP_ATTR_UPCALL_PID
];
1584 ovs_dp_change(dp
, a
);
1586 /* So far only local changes have been made, now need the lock. */
1589 vport
= new_vport(&parms
);
1590 if (IS_ERR(vport
)) {
1591 err
= PTR_ERR(vport
);
1595 if (err
== -EEXIST
) {
1596 /* An outdated user space instance that does not understand
1597 * the concept of user_features has attempted to create a new
1598 * datapath and is likely to reuse it. Drop all user features.
1600 if (info
->genlhdr
->version
< OVS_DP_VER_FEATURES
)
1601 ovs_dp_reset_user_features(skb
, info
);
1604 goto err_destroy_ports_array
;
1607 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1608 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1611 ovs_net
= net_generic(ovs_dp_get_net(dp
), ovs_net_id
);
1612 list_add_tail_rcu(&dp
->list_node
, &ovs_net
->dps
);
1616 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1619 err_destroy_ports_array
:
1623 free_percpu(dp
->stats_percpu
);
1625 ovs_flow_tbl_destroy(&dp
->table
);
1634 /* Called with ovs_mutex. */
1635 static void __dp_destroy(struct datapath
*dp
)
1639 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1640 struct vport
*vport
;
1641 struct hlist_node
*n
;
1643 hlist_for_each_entry_safe(vport
, n
, &dp
->ports
[i
], dp_hash_node
)
1644 if (vport
->port_no
!= OVSP_LOCAL
)
1645 ovs_dp_detach_port(vport
);
1648 list_del_rcu(&dp
->list_node
);
1650 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1651 * all ports in datapath are destroyed first before freeing datapath.
1653 ovs_dp_detach_port(ovs_vport_ovsl(dp
, OVSP_LOCAL
));
1655 /* RCU destroy the flow table */
1656 call_rcu(&dp
->rcu
, destroy_dp_rcu
);
1659 static int ovs_dp_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1661 struct sk_buff
*reply
;
1662 struct datapath
*dp
;
1665 reply
= ovs_dp_cmd_alloc_info(info
);
1670 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1673 goto err_unlock_free
;
1675 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1676 info
->snd_seq
, 0, OVS_DP_CMD_DEL
);
1682 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1692 static int ovs_dp_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1694 struct sk_buff
*reply
;
1695 struct datapath
*dp
;
1698 reply
= ovs_dp_cmd_alloc_info(info
);
1703 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1706 goto err_unlock_free
;
1708 ovs_dp_change(dp
, info
->attrs
);
1710 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1711 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1715 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1725 static int ovs_dp_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1727 struct sk_buff
*reply
;
1728 struct datapath
*dp
;
1731 reply
= ovs_dp_cmd_alloc_info(info
);
1736 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1739 goto err_unlock_free
;
1741 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1742 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1746 return genlmsg_reply(reply
, info
);
1754 static int ovs_dp_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1756 struct ovs_net
*ovs_net
= net_generic(sock_net(skb
->sk
), ovs_net_id
);
1757 struct datapath
*dp
;
1758 int skip
= cb
->args
[0];
1762 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
1764 ovs_dp_cmd_fill_info(dp
, skb
, NETLINK_CB(cb
->skb
).portid
,
1765 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1766 OVS_DP_CMD_NEW
) < 0)
1777 static const struct nla_policy datapath_policy
[OVS_DP_ATTR_MAX
+ 1] = {
1778 [OVS_DP_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1779 [OVS_DP_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1780 [OVS_DP_ATTR_USER_FEATURES
] = { .type
= NLA_U32
},
1783 static const struct genl_ops dp_datapath_genl_ops
[] = {
1784 { .cmd
= OVS_DP_CMD_NEW
,
1785 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1786 .policy
= datapath_policy
,
1787 .doit
= ovs_dp_cmd_new
1789 { .cmd
= OVS_DP_CMD_DEL
,
1790 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1791 .policy
= datapath_policy
,
1792 .doit
= ovs_dp_cmd_del
1794 { .cmd
= OVS_DP_CMD_GET
,
1795 .flags
= 0, /* OK for unprivileged users. */
1796 .policy
= datapath_policy
,
1797 .doit
= ovs_dp_cmd_get
,
1798 .dumpit
= ovs_dp_cmd_dump
1800 { .cmd
= OVS_DP_CMD_SET
,
1801 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1802 .policy
= datapath_policy
,
1803 .doit
= ovs_dp_cmd_set
,
1807 static struct genl_family dp_datapath_genl_family
= {
1808 .id
= GENL_ID_GENERATE
,
1809 .hdrsize
= sizeof(struct ovs_header
),
1810 .name
= OVS_DATAPATH_FAMILY
,
1811 .version
= OVS_DATAPATH_VERSION
,
1812 .maxattr
= OVS_DP_ATTR_MAX
,
1814 .parallel_ops
= true,
1815 .ops
= dp_datapath_genl_ops
,
1816 .n_ops
= ARRAY_SIZE(dp_datapath_genl_ops
),
1817 .mcgrps
= &ovs_dp_datapath_multicast_group
,
1821 /* Called with ovs_mutex or RCU read lock. */
1822 static int ovs_vport_cmd_fill_info(struct vport
*vport
, struct sk_buff
*skb
,
1823 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1825 struct ovs_header
*ovs_header
;
1826 struct ovs_vport_stats vport_stats
;
1829 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_vport_genl_family
,
1834 ovs_header
->dp_ifindex
= get_dpifindex(vport
->dp
);
1836 if (nla_put_u32(skb
, OVS_VPORT_ATTR_PORT_NO
, vport
->port_no
) ||
1837 nla_put_u32(skb
, OVS_VPORT_ATTR_TYPE
, vport
->ops
->type
) ||
1838 nla_put_string(skb
, OVS_VPORT_ATTR_NAME
,
1839 ovs_vport_name(vport
)))
1840 goto nla_put_failure
;
1842 ovs_vport_get_stats(vport
, &vport_stats
);
1843 if (nla_put(skb
, OVS_VPORT_ATTR_STATS
, sizeof(struct ovs_vport_stats
),
1845 goto nla_put_failure
;
1847 if (ovs_vport_get_upcall_portids(vport
, skb
))
1848 goto nla_put_failure
;
1850 err
= ovs_vport_get_options(vport
, skb
);
1851 if (err
== -EMSGSIZE
)
1854 genlmsg_end(skb
, ovs_header
);
1860 genlmsg_cancel(skb
, ovs_header
);
1864 static struct sk_buff
*ovs_vport_cmd_alloc_info(void)
1866 return nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1869 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1870 struct sk_buff
*ovs_vport_cmd_build_info(struct vport
*vport
, u32 portid
,
1873 struct sk_buff
*skb
;
1876 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
1878 return ERR_PTR(-ENOMEM
);
1880 retval
= ovs_vport_cmd_fill_info(vport
, skb
, portid
, seq
, 0, cmd
);
1886 /* Called with ovs_mutex or RCU read lock. */
1887 static struct vport
*lookup_vport(struct net
*net
,
1888 const struct ovs_header
*ovs_header
,
1889 struct nlattr
*a
[OVS_VPORT_ATTR_MAX
+ 1])
1891 struct datapath
*dp
;
1892 struct vport
*vport
;
1894 if (a
[OVS_VPORT_ATTR_NAME
]) {
1895 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_VPORT_ATTR_NAME
]));
1897 return ERR_PTR(-ENODEV
);
1898 if (ovs_header
->dp_ifindex
&&
1899 ovs_header
->dp_ifindex
!= get_dpifindex(vport
->dp
))
1900 return ERR_PTR(-ENODEV
);
1902 } else if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
1903 u32 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1905 if (port_no
>= DP_MAX_PORTS
)
1906 return ERR_PTR(-EFBIG
);
1908 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1910 return ERR_PTR(-ENODEV
);
1912 vport
= ovs_vport_ovsl_rcu(dp
, port_no
);
1914 return ERR_PTR(-ENODEV
);
1917 return ERR_PTR(-EINVAL
);
1920 static int ovs_vport_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1922 struct nlattr
**a
= info
->attrs
;
1923 struct ovs_header
*ovs_header
= info
->userhdr
;
1924 struct vport_parms parms
;
1925 struct sk_buff
*reply
;
1926 struct vport
*vport
;
1927 struct datapath
*dp
;
1931 if (!a
[OVS_VPORT_ATTR_NAME
] || !a
[OVS_VPORT_ATTR_TYPE
] ||
1932 !a
[OVS_VPORT_ATTR_UPCALL_PID
])
1935 port_no
= a
[OVS_VPORT_ATTR_PORT_NO
]
1936 ? nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]) : 0;
1937 if (port_no
>= DP_MAX_PORTS
)
1940 reply
= ovs_vport_cmd_alloc_info();
1946 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1949 goto exit_unlock_free
;
1952 vport
= ovs_vport_ovsl(dp
, port_no
);
1955 goto exit_unlock_free
;
1957 for (port_no
= 1; ; port_no
++) {
1958 if (port_no
>= DP_MAX_PORTS
) {
1960 goto exit_unlock_free
;
1962 vport
= ovs_vport_ovsl(dp
, port_no
);
1968 parms
.name
= nla_data(a
[OVS_VPORT_ATTR_NAME
]);
1969 parms
.type
= nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]);
1970 parms
.options
= a
[OVS_VPORT_ATTR_OPTIONS
];
1972 parms
.port_no
= port_no
;
1973 parms
.upcall_portids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
1975 vport
= new_vport(&parms
);
1976 err
= PTR_ERR(vport
);
1977 if (IS_ERR(vport
)) {
1980 goto exit_unlock_free
;
1983 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
1984 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
1988 ovs_notify(&dp_vport_genl_family
, reply
, info
);
1997 static int ovs_vport_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1999 struct nlattr
**a
= info
->attrs
;
2000 struct sk_buff
*reply
;
2001 struct vport
*vport
;
2004 reply
= ovs_vport_cmd_alloc_info();
2009 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2010 err
= PTR_ERR(vport
);
2012 goto exit_unlock_free
;
2014 if (a
[OVS_VPORT_ATTR_TYPE
] &&
2015 nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]) != vport
->ops
->type
) {
2017 goto exit_unlock_free
;
2020 if (a
[OVS_VPORT_ATTR_OPTIONS
]) {
2021 err
= ovs_vport_set_options(vport
, a
[OVS_VPORT_ATTR_OPTIONS
]);
2023 goto exit_unlock_free
;
2027 if (a
[OVS_VPORT_ATTR_UPCALL_PID
]) {
2028 struct nlattr
*ids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2030 err
= ovs_vport_set_upcall_portids(vport
, ids
);
2032 goto exit_unlock_free
;
2035 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2036 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2040 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2049 static int ovs_vport_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
2051 struct nlattr
**a
= info
->attrs
;
2052 struct sk_buff
*reply
;
2053 struct vport
*vport
;
2056 reply
= ovs_vport_cmd_alloc_info();
2061 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2062 err
= PTR_ERR(vport
);
2064 goto exit_unlock_free
;
2066 if (vport
->port_no
== OVSP_LOCAL
) {
2068 goto exit_unlock_free
;
2071 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2072 info
->snd_seq
, 0, OVS_VPORT_CMD_DEL
);
2074 ovs_dp_detach_port(vport
);
2077 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2086 static int ovs_vport_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
2088 struct nlattr
**a
= info
->attrs
;
2089 struct ovs_header
*ovs_header
= info
->userhdr
;
2090 struct sk_buff
*reply
;
2091 struct vport
*vport
;
2094 reply
= ovs_vport_cmd_alloc_info();
2099 vport
= lookup_vport(sock_net(skb
->sk
), ovs_header
, a
);
2100 err
= PTR_ERR(vport
);
2102 goto exit_unlock_free
;
2103 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2104 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2108 return genlmsg_reply(reply
, info
);
2116 static int ovs_vport_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2118 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
2119 struct datapath
*dp
;
2120 int bucket
= cb
->args
[0], skip
= cb
->args
[1];
2124 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2129 for (i
= bucket
; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2130 struct vport
*vport
;
2133 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
2135 ovs_vport_cmd_fill_info(vport
, skb
,
2136 NETLINK_CB(cb
->skb
).portid
,
2139 OVS_VPORT_CMD_NEW
) < 0)
2155 static const struct nla_policy vport_policy
[OVS_VPORT_ATTR_MAX
+ 1] = {
2156 [OVS_VPORT_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
2157 [OVS_VPORT_ATTR_STATS
] = { .len
= sizeof(struct ovs_vport_stats
) },
2158 [OVS_VPORT_ATTR_PORT_NO
] = { .type
= NLA_U32
},
2159 [OVS_VPORT_ATTR_TYPE
] = { .type
= NLA_U32
},
2160 [OVS_VPORT_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
2161 [OVS_VPORT_ATTR_OPTIONS
] = { .type
= NLA_NESTED
},
2164 static const struct genl_ops dp_vport_genl_ops
[] = {
2165 { .cmd
= OVS_VPORT_CMD_NEW
,
2166 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2167 .policy
= vport_policy
,
2168 .doit
= ovs_vport_cmd_new
2170 { .cmd
= OVS_VPORT_CMD_DEL
,
2171 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2172 .policy
= vport_policy
,
2173 .doit
= ovs_vport_cmd_del
2175 { .cmd
= OVS_VPORT_CMD_GET
,
2176 .flags
= 0, /* OK for unprivileged users. */
2177 .policy
= vport_policy
,
2178 .doit
= ovs_vport_cmd_get
,
2179 .dumpit
= ovs_vport_cmd_dump
2181 { .cmd
= OVS_VPORT_CMD_SET
,
2182 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2183 .policy
= vport_policy
,
2184 .doit
= ovs_vport_cmd_set
,
2188 struct genl_family dp_vport_genl_family
= {
2189 .id
= GENL_ID_GENERATE
,
2190 .hdrsize
= sizeof(struct ovs_header
),
2191 .name
= OVS_VPORT_FAMILY
,
2192 .version
= OVS_VPORT_VERSION
,
2193 .maxattr
= OVS_VPORT_ATTR_MAX
,
2195 .parallel_ops
= true,
2196 .ops
= dp_vport_genl_ops
,
2197 .n_ops
= ARRAY_SIZE(dp_vport_genl_ops
),
2198 .mcgrps
= &ovs_dp_vport_multicast_group
,
2202 static struct genl_family
* const dp_genl_families
[] = {
2203 &dp_datapath_genl_family
,
2204 &dp_vport_genl_family
,
2205 &dp_flow_genl_family
,
2206 &dp_packet_genl_family
,
2209 static void dp_unregister_genl(int n_families
)
2213 for (i
= 0; i
< n_families
; i
++)
2214 genl_unregister_family(dp_genl_families
[i
]);
2217 static int dp_register_genl(void)
2222 for (i
= 0; i
< ARRAY_SIZE(dp_genl_families
); i
++) {
2224 err
= genl_register_family(dp_genl_families
[i
]);
2232 dp_unregister_genl(i
);
2236 static int __net_init
ovs_init_net(struct net
*net
)
2238 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2240 INIT_LIST_HEAD(&ovs_net
->dps
);
2241 INIT_WORK(&ovs_net
->dp_notify_work
, ovs_dp_notify_wq
);
2246 static void __net_exit
list_vports_from_net(struct net
*net
, struct net
*dnet
,
2247 struct list_head
*head
)
2249 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2250 struct datapath
*dp
;
2252 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
2255 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2256 struct vport
*vport
;
2258 hlist_for_each_entry(vport
, &dp
->ports
[i
], dp_hash_node
) {
2259 if (vport
->ops
->type
!= OVS_VPORT_TYPE_INTERNAL
)
2262 if (dev_net(vport
->dev
) == dnet
)
2263 list_add(&vport
->detach_list
, head
);
2269 static void __net_exit
ovs_exit_net(struct net
*dnet
)
2271 struct datapath
*dp
, *dp_next
;
2272 struct ovs_net
*ovs_net
= net_generic(dnet
, ovs_net_id
);
2273 struct vport
*vport
, *vport_next
;
2279 list_for_each_entry_safe(dp
, dp_next
, &ovs_net
->dps
, list_node
)
2284 list_vports_from_net(net
, dnet
, &head
);
2287 /* Detach all vports from given namespace. */
2288 list_for_each_entry_safe(vport
, vport_next
, &head
, detach_list
) {
2289 list_del(&vport
->detach_list
);
2290 ovs_dp_detach_port(vport
);
2295 cancel_work_sync(&ovs_net
->dp_notify_work
);
2298 static struct pernet_operations ovs_net_ops
= {
2299 .init
= ovs_init_net
,
2300 .exit
= ovs_exit_net
,
2302 .size
= sizeof(struct ovs_net
),
2305 static int __init
dp_init(void)
2309 BUILD_BUG_ON(sizeof(struct ovs_skb_cb
) > FIELD_SIZEOF(struct sk_buff
, cb
));
2311 pr_info("Open vSwitch switching datapath\n");
2313 err
= action_fifos_init();
2317 err
= ovs_internal_dev_rtnl_link_register();
2319 goto error_action_fifos_exit
;
2321 err
= ovs_flow_init();
2323 goto error_unreg_rtnl_link
;
2325 err
= ovs_vport_init();
2327 goto error_flow_exit
;
2329 err
= register_pernet_device(&ovs_net_ops
);
2331 goto error_vport_exit
;
2333 err
= register_netdevice_notifier(&ovs_dp_device_notifier
);
2335 goto error_netns_exit
;
2337 err
= ovs_netdev_init();
2339 goto error_unreg_notifier
;
2341 err
= dp_register_genl();
2343 goto error_unreg_netdev
;
2349 error_unreg_notifier
:
2350 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2352 unregister_pernet_device(&ovs_net_ops
);
2357 error_unreg_rtnl_link
:
2358 ovs_internal_dev_rtnl_link_unregister();
2359 error_action_fifos_exit
:
2360 action_fifos_exit();
2365 static void dp_cleanup(void)
2367 dp_unregister_genl(ARRAY_SIZE(dp_genl_families
));
2369 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2370 unregister_pernet_device(&ovs_net_ops
);
2374 ovs_internal_dev_rtnl_link_unregister();
2375 action_fifos_exit();
2378 module_init(dp_init
);
2379 module_exit(dp_cleanup
);
2381 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2382 MODULE_LICENSE("GPL");