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
, info
, 0, GFP_KERNEL
);
100 * All writes e.g. Writes to device state (add/remove datapath, port, set
101 * operations on vports, etc.), Writes to other state (flow table
102 * modifications, set miscellaneous datapath parameters, etc.) are protected
105 * Reads are protected by RCU.
107 * There are a few special cases (mostly stats) that have their own
108 * synchronization but they nest under all of above and don't interact with
111 * The RTNL lock nests inside ovs_mutex.
114 static DEFINE_MUTEX(ovs_mutex
);
118 mutex_lock(&ovs_mutex
);
121 void ovs_unlock(void)
123 mutex_unlock(&ovs_mutex
);
126 #ifdef CONFIG_LOCKDEP
127 int lockdep_ovsl_is_held(void)
130 return lockdep_is_held(&ovs_mutex
);
134 EXPORT_SYMBOL_GPL(lockdep_ovsl_is_held
);
137 static struct vport
*new_vport(const struct vport_parms
*);
138 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*,
139 const struct sw_flow_key
*,
140 const struct dp_upcall_info
*);
141 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*,
142 const struct sw_flow_key
*,
143 const struct dp_upcall_info
*);
145 /* Must be called with rcu_read_lock. */
146 static struct datapath
*get_dp_rcu(struct net
*net
, int dp_ifindex
)
148 struct net_device
*dev
= dev_get_by_index_rcu(net
, dp_ifindex
);
151 struct vport
*vport
= ovs_internal_dev_get_vport(dev
);
159 /* The caller must hold either ovs_mutex or rcu_read_lock to keep the
160 * returned dp pointer valid.
162 static inline struct datapath
*get_dp(struct net
*net
, int dp_ifindex
)
166 WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
168 dp
= get_dp_rcu(net
, dp_ifindex
);
174 /* Must be called with rcu_read_lock or ovs_mutex. */
175 const char *ovs_dp_name(const struct datapath
*dp
)
177 struct vport
*vport
= ovs_vport_ovsl_rcu(dp
, OVSP_LOCAL
);
178 return ovs_vport_name(vport
);
181 static int get_dpifindex(const struct datapath
*dp
)
188 local
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
190 ifindex
= local
->dev
->ifindex
;
199 static void destroy_dp_rcu(struct rcu_head
*rcu
)
201 struct datapath
*dp
= container_of(rcu
, struct datapath
, rcu
);
203 ovs_flow_tbl_destroy(&dp
->table
);
204 free_percpu(dp
->stats_percpu
);
209 static struct hlist_head
*vport_hash_bucket(const struct datapath
*dp
,
212 return &dp
->ports
[port_no
& (DP_VPORT_HASH_BUCKETS
- 1)];
215 /* Called with ovs_mutex or RCU read lock. */
216 struct vport
*ovs_lookup_vport(const struct datapath
*dp
, u16 port_no
)
219 struct hlist_head
*head
;
221 head
= vport_hash_bucket(dp
, port_no
);
222 hlist_for_each_entry_rcu(vport
, head
, dp_hash_node
) {
223 if (vport
->port_no
== port_no
)
229 /* Called with ovs_mutex. */
230 static struct vport
*new_vport(const struct vport_parms
*parms
)
234 vport
= ovs_vport_add(parms
);
235 if (!IS_ERR(vport
)) {
236 struct datapath
*dp
= parms
->dp
;
237 struct hlist_head
*head
= vport_hash_bucket(dp
, vport
->port_no
);
239 hlist_add_head_rcu(&vport
->dp_hash_node
, head
);
244 void ovs_dp_detach_port(struct vport
*p
)
248 /* First drop references to device. */
249 hlist_del_rcu(&p
->dp_hash_node
);
251 /* Then destroy it. */
255 /* Must be called with rcu_read_lock. */
256 void ovs_dp_process_packet(struct sk_buff
*skb
, struct sw_flow_key
*key
)
258 const struct vport
*p
= OVS_CB(skb
)->input_vport
;
259 struct datapath
*dp
= p
->dp
;
260 struct sw_flow
*flow
;
261 struct sw_flow_actions
*sf_acts
;
262 struct dp_stats_percpu
*stats
;
266 stats
= this_cpu_ptr(dp
->stats_percpu
);
269 flow
= ovs_flow_tbl_lookup_stats(&dp
->table
, key
, &n_mask_hit
);
270 if (unlikely(!flow
)) {
271 struct dp_upcall_info upcall
;
274 memset(&upcall
, 0, sizeof(upcall
));
275 upcall
.cmd
= OVS_PACKET_CMD_MISS
;
276 upcall
.portid
= ovs_vport_find_upcall_portid(p
, skb
);
277 upcall
.mru
= OVS_CB(skb
)->mru
;
278 error
= ovs_dp_upcall(dp
, skb
, key
, &upcall
);
283 stats_counter
= &stats
->n_missed
;
287 ovs_flow_stats_update(flow
, key
->tp
.flags
, skb
);
288 sf_acts
= rcu_dereference(flow
->sf_acts
);
289 ovs_execute_actions(dp
, skb
, sf_acts
, key
);
291 stats_counter
= &stats
->n_hit
;
294 /* Update datapath statistics. */
295 u64_stats_update_begin(&stats
->syncp
);
297 stats
->n_mask_hit
+= n_mask_hit
;
298 u64_stats_update_end(&stats
->syncp
);
301 int ovs_dp_upcall(struct datapath
*dp
, struct sk_buff
*skb
,
302 const struct sw_flow_key
*key
,
303 const struct dp_upcall_info
*upcall_info
)
305 struct dp_stats_percpu
*stats
;
308 if (upcall_info
->portid
== 0) {
313 if (!skb_is_gso(skb
))
314 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
);
316 err
= queue_gso_packets(dp
, skb
, key
, upcall_info
);
323 stats
= this_cpu_ptr(dp
->stats_percpu
);
325 u64_stats_update_begin(&stats
->syncp
);
327 u64_stats_update_end(&stats
->syncp
);
332 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*skb
,
333 const struct sw_flow_key
*key
,
334 const struct dp_upcall_info
*upcall_info
)
336 unsigned short gso_type
= skb_shinfo(skb
)->gso_type
;
337 struct sw_flow_key later_key
;
338 struct sk_buff
*segs
, *nskb
;
341 BUILD_BUG_ON(sizeof(*OVS_CB(skb
)) > SKB_SGO_CB_OFFSET
);
342 segs
= __skb_gso_segment(skb
, NETIF_F_SG
, false);
344 return PTR_ERR(segs
);
348 if (gso_type
& SKB_GSO_UDP
) {
349 /* The initial flow key extracted by ovs_flow_key_extract()
350 * in this case is for a first fragment, so we need to
351 * properly mark later fragments.
354 later_key
.ip
.frag
= OVS_FRAG_TYPE_LATER
;
357 /* Queue all of the segments. */
360 if (gso_type
& SKB_GSO_UDP
&& skb
!= segs
)
363 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
);
367 } while ((skb
= skb
->next
));
369 /* Free all of the segments. */
377 } while ((skb
= nskb
));
381 static size_t upcall_msg_size(const struct dp_upcall_info
*upcall_info
,
384 size_t size
= NLMSG_ALIGN(sizeof(struct ovs_header
))
385 + nla_total_size(hdrlen
) /* OVS_PACKET_ATTR_PACKET */
386 + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */
388 /* OVS_PACKET_ATTR_USERDATA */
389 if (upcall_info
->userdata
)
390 size
+= NLA_ALIGN(upcall_info
->userdata
->nla_len
);
392 /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */
393 if (upcall_info
->egress_tun_info
)
394 size
+= nla_total_size(ovs_tun_key_attr_size());
396 /* OVS_PACKET_ATTR_ACTIONS */
397 if (upcall_info
->actions_len
)
398 size
+= nla_total_size(upcall_info
->actions_len
);
400 /* OVS_PACKET_ATTR_MRU */
401 if (upcall_info
->mru
)
402 size
+= nla_total_size(sizeof(upcall_info
->mru
));
407 static void pad_packet(struct datapath
*dp
, struct sk_buff
*skb
)
409 if (!(dp
->user_features
& OVS_DP_F_UNALIGNED
)) {
410 size_t plen
= NLA_ALIGN(skb
->len
) - skb
->len
;
413 memset(skb_put(skb
, plen
), 0, plen
);
417 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*skb
,
418 const struct sw_flow_key
*key
,
419 const struct dp_upcall_info
*upcall_info
)
421 struct ovs_header
*upcall
;
422 struct sk_buff
*nskb
= NULL
;
423 struct sk_buff
*user_skb
= NULL
; /* to be queued to userspace */
425 struct genl_info info
= {
426 .dst_sk
= ovs_dp_get_net(dp
)->genl_sock
,
427 .snd_portid
= upcall_info
->portid
,
433 dp_ifindex
= get_dpifindex(dp
);
437 if (skb_vlan_tag_present(skb
)) {
438 nskb
= skb_clone(skb
, GFP_ATOMIC
);
442 nskb
= __vlan_hwaccel_push_inside(nskb
);
449 if (nla_attr_size(skb
->len
) > USHRT_MAX
) {
454 /* Complete checksum if needed */
455 if (skb
->ip_summed
== CHECKSUM_PARTIAL
&&
456 (err
= skb_checksum_help(skb
)))
459 /* Older versions of OVS user space enforce alignment of the last
460 * Netlink attribute to NLA_ALIGNTO which would require extensive
461 * padding logic. Only perform zerocopy if padding is not required.
463 if (dp
->user_features
& OVS_DP_F_UNALIGNED
)
464 hlen
= skb_zerocopy_headlen(skb
);
468 len
= upcall_msg_size(upcall_info
, hlen
);
469 user_skb
= genlmsg_new_unicast(len
, &info
, GFP_ATOMIC
);
475 upcall
= genlmsg_put(user_skb
, 0, 0, &dp_packet_genl_family
,
476 0, upcall_info
->cmd
);
477 upcall
->dp_ifindex
= dp_ifindex
;
479 err
= ovs_nla_put_key(key
, key
, OVS_PACKET_ATTR_KEY
, false, user_skb
);
482 if (upcall_info
->userdata
)
483 __nla_put(user_skb
, OVS_PACKET_ATTR_USERDATA
,
484 nla_len(upcall_info
->userdata
),
485 nla_data(upcall_info
->userdata
));
487 if (upcall_info
->egress_tun_info
) {
488 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_EGRESS_TUN_KEY
);
489 err
= ovs_nla_put_tunnel_info(user_skb
,
490 upcall_info
->egress_tun_info
);
492 nla_nest_end(user_skb
, nla
);
495 if (upcall_info
->actions_len
) {
496 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_ACTIONS
);
497 err
= ovs_nla_put_actions(upcall_info
->actions
,
498 upcall_info
->actions_len
,
501 nla_nest_end(user_skb
, nla
);
503 nla_nest_cancel(user_skb
, nla
);
506 /* Add OVS_PACKET_ATTR_MRU */
507 if (upcall_info
->mru
) {
508 if (nla_put_u16(user_skb
, OVS_PACKET_ATTR_MRU
,
513 pad_packet(dp
, user_skb
);
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
);
524 err
= skb_zerocopy(user_skb
, skb
, skb
->len
, 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
;
554 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 skb_reset_mac_header(packet
);
575 eth
= eth_hdr(packet
);
577 /* Normally, setting the skb 'protocol' field would be handled by a
578 * call to eth_type_trans(), but it assumes there's a sending
579 * device, which we may not have. */
580 if (eth_proto_is_802_3(eth
->h_proto
))
581 packet
->protocol
= eth
->h_proto
;
583 packet
->protocol
= htons(ETH_P_802_2
);
585 /* Set packet's mru */
586 if (a
[OVS_PACKET_ATTR_MRU
]) {
587 mru
= nla_get_u16(a
[OVS_PACKET_ATTR_MRU
]);
588 packet
->ignore_df
= 1;
590 OVS_CB(packet
)->mru
= mru
;
592 /* Build an sw_flow for sending this packet. */
593 flow
= ovs_flow_alloc();
598 err
= ovs_flow_key_extract_userspace(net
, a
[OVS_PACKET_ATTR_KEY
],
599 packet
, &flow
->key
, log
);
603 err
= ovs_nla_copy_actions(net
, a
[OVS_PACKET_ATTR_ACTIONS
],
604 &flow
->key
, &acts
, log
);
608 rcu_assign_pointer(flow
->sf_acts
, acts
);
609 packet
->priority
= flow
->key
.phy
.priority
;
610 packet
->mark
= flow
->key
.phy
.skb_mark
;
613 dp
= get_dp_rcu(net
, ovs_header
->dp_ifindex
);
618 input_vport
= ovs_vport_rcu(dp
, flow
->key
.phy
.in_port
);
620 input_vport
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
625 packet
->dev
= input_vport
->dev
;
626 OVS_CB(packet
)->input_vport
= input_vport
;
627 sf_acts
= rcu_dereference(flow
->sf_acts
);
630 err
= ovs_execute_actions(dp
, packet
, sf_acts
, &flow
->key
);
634 ovs_flow_free(flow
, false);
640 ovs_flow_free(flow
, false);
647 static const struct nla_policy packet_policy
[OVS_PACKET_ATTR_MAX
+ 1] = {
648 [OVS_PACKET_ATTR_PACKET
] = { .len
= ETH_HLEN
},
649 [OVS_PACKET_ATTR_KEY
] = { .type
= NLA_NESTED
},
650 [OVS_PACKET_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
651 [OVS_PACKET_ATTR_PROBE
] = { .type
= NLA_FLAG
},
652 [OVS_PACKET_ATTR_MRU
] = { .type
= NLA_U16
},
655 static const struct genl_ops dp_packet_genl_ops
[] = {
656 { .cmd
= OVS_PACKET_CMD_EXECUTE
,
657 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
658 .policy
= packet_policy
,
659 .doit
= ovs_packet_cmd_execute
663 static struct genl_family dp_packet_genl_family
= {
664 .id
= GENL_ID_GENERATE
,
665 .hdrsize
= sizeof(struct ovs_header
),
666 .name
= OVS_PACKET_FAMILY
,
667 .version
= OVS_PACKET_VERSION
,
668 .maxattr
= OVS_PACKET_ATTR_MAX
,
670 .parallel_ops
= true,
671 .ops
= dp_packet_genl_ops
,
672 .n_ops
= ARRAY_SIZE(dp_packet_genl_ops
),
675 static void get_dp_stats(const struct datapath
*dp
, struct ovs_dp_stats
*stats
,
676 struct ovs_dp_megaflow_stats
*mega_stats
)
680 memset(mega_stats
, 0, sizeof(*mega_stats
));
682 stats
->n_flows
= ovs_flow_tbl_count(&dp
->table
);
683 mega_stats
->n_masks
= ovs_flow_tbl_num_masks(&dp
->table
);
685 stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
687 for_each_possible_cpu(i
) {
688 const struct dp_stats_percpu
*percpu_stats
;
689 struct dp_stats_percpu local_stats
;
692 percpu_stats
= per_cpu_ptr(dp
->stats_percpu
, i
);
695 start
= u64_stats_fetch_begin_irq(&percpu_stats
->syncp
);
696 local_stats
= *percpu_stats
;
697 } while (u64_stats_fetch_retry_irq(&percpu_stats
->syncp
, start
));
699 stats
->n_hit
+= local_stats
.n_hit
;
700 stats
->n_missed
+= local_stats
.n_missed
;
701 stats
->n_lost
+= local_stats
.n_lost
;
702 mega_stats
->n_mask_hit
+= local_stats
.n_mask_hit
;
706 static bool should_fill_key(const struct sw_flow_id
*sfid
, uint32_t ufid_flags
)
708 return ovs_identifier_is_ufid(sfid
) &&
709 !(ufid_flags
& OVS_UFID_F_OMIT_KEY
);
712 static bool should_fill_mask(uint32_t ufid_flags
)
714 return !(ufid_flags
& OVS_UFID_F_OMIT_MASK
);
717 static bool should_fill_actions(uint32_t ufid_flags
)
719 return !(ufid_flags
& OVS_UFID_F_OMIT_ACTIONS
);
722 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions
*acts
,
723 const struct sw_flow_id
*sfid
,
726 size_t len
= NLMSG_ALIGN(sizeof(struct ovs_header
));
728 /* OVS_FLOW_ATTR_UFID */
729 if (sfid
&& ovs_identifier_is_ufid(sfid
))
730 len
+= nla_total_size(sfid
->ufid_len
);
732 /* OVS_FLOW_ATTR_KEY */
733 if (!sfid
|| should_fill_key(sfid
, ufid_flags
))
734 len
+= nla_total_size(ovs_key_attr_size());
736 /* OVS_FLOW_ATTR_MASK */
737 if (should_fill_mask(ufid_flags
))
738 len
+= nla_total_size(ovs_key_attr_size());
740 /* OVS_FLOW_ATTR_ACTIONS */
741 if (should_fill_actions(ufid_flags
))
742 len
+= nla_total_size(acts
->orig_len
);
745 + nla_total_size(sizeof(struct ovs_flow_stats
)) /* OVS_FLOW_ATTR_STATS */
746 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
747 + nla_total_size(8); /* OVS_FLOW_ATTR_USED */
750 /* Called with ovs_mutex or RCU read lock. */
751 static int ovs_flow_cmd_fill_stats(const struct sw_flow
*flow
,
754 struct ovs_flow_stats stats
;
758 ovs_flow_stats_get(flow
, &stats
, &used
, &tcp_flags
);
761 nla_put_u64(skb
, OVS_FLOW_ATTR_USED
, ovs_flow_used_time(used
)))
764 if (stats
.n_packets
&&
765 nla_put(skb
, OVS_FLOW_ATTR_STATS
, sizeof(struct ovs_flow_stats
), &stats
))
768 if ((u8
)ntohs(tcp_flags
) &&
769 nla_put_u8(skb
, OVS_FLOW_ATTR_TCP_FLAGS
, (u8
)ntohs(tcp_flags
)))
775 /* Called with ovs_mutex or RCU read lock. */
776 static int ovs_flow_cmd_fill_actions(const struct sw_flow
*flow
,
777 struct sk_buff
*skb
, int skb_orig_len
)
779 struct nlattr
*start
;
782 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
783 * this is the first flow to be dumped into 'skb'. This is unusual for
784 * Netlink but individual action lists can be longer than
785 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
786 * The userspace caller can always fetch the actions separately if it
787 * really wants them. (Most userspace callers in fact don't care.)
789 * This can only fail for dump operations because the skb is always
790 * properly sized for single flows.
792 start
= nla_nest_start(skb
, OVS_FLOW_ATTR_ACTIONS
);
794 const struct sw_flow_actions
*sf_acts
;
796 sf_acts
= rcu_dereference_ovsl(flow
->sf_acts
);
797 err
= ovs_nla_put_actions(sf_acts
->actions
,
798 sf_acts
->actions_len
, skb
);
801 nla_nest_end(skb
, start
);
806 nla_nest_cancel(skb
, start
);
808 } else if (skb_orig_len
) {
815 /* Called with ovs_mutex or RCU read lock. */
816 static int ovs_flow_cmd_fill_info(const struct sw_flow
*flow
, int dp_ifindex
,
817 struct sk_buff
*skb
, u32 portid
,
818 u32 seq
, u32 flags
, u8 cmd
, u32 ufid_flags
)
820 const int skb_orig_len
= skb
->len
;
821 struct ovs_header
*ovs_header
;
824 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_flow_genl_family
,
829 ovs_header
->dp_ifindex
= dp_ifindex
;
831 err
= ovs_nla_put_identifier(flow
, skb
);
835 if (should_fill_key(&flow
->id
, ufid_flags
)) {
836 err
= ovs_nla_put_masked_key(flow
, skb
);
841 if (should_fill_mask(ufid_flags
)) {
842 err
= ovs_nla_put_mask(flow
, skb
);
847 err
= ovs_flow_cmd_fill_stats(flow
, skb
);
851 if (should_fill_actions(ufid_flags
)) {
852 err
= ovs_flow_cmd_fill_actions(flow
, skb
, skb_orig_len
);
857 genlmsg_end(skb
, ovs_header
);
861 genlmsg_cancel(skb
, ovs_header
);
865 /* May not be called with RCU read lock. */
866 static struct sk_buff
*ovs_flow_cmd_alloc_info(const struct sw_flow_actions
*acts
,
867 const struct sw_flow_id
*sfid
,
868 struct genl_info
*info
,
875 if (!always
&& !ovs_must_notify(&dp_flow_genl_family
, info
, 0))
878 len
= ovs_flow_cmd_msg_size(acts
, sfid
, ufid_flags
);
879 skb
= genlmsg_new_unicast(len
, info
, GFP_KERNEL
);
881 return ERR_PTR(-ENOMEM
);
886 /* Called with ovs_mutex. */
887 static struct sk_buff
*ovs_flow_cmd_build_info(const struct sw_flow
*flow
,
889 struct genl_info
*info
, u8 cmd
,
890 bool always
, u32 ufid_flags
)
895 skb
= ovs_flow_cmd_alloc_info(ovsl_dereference(flow
->sf_acts
),
896 &flow
->id
, info
, always
, ufid_flags
);
897 if (IS_ERR_OR_NULL(skb
))
900 retval
= ovs_flow_cmd_fill_info(flow
, dp_ifindex
, skb
,
901 info
->snd_portid
, info
->snd_seq
, 0,
907 static int ovs_flow_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
909 struct net
*net
= sock_net(skb
->sk
);
910 struct nlattr
**a
= info
->attrs
;
911 struct ovs_header
*ovs_header
= info
->userhdr
;
912 struct sw_flow
*flow
= NULL
, *new_flow
;
913 struct sw_flow_mask mask
;
914 struct sk_buff
*reply
;
916 struct sw_flow_key key
;
917 struct sw_flow_actions
*acts
;
918 struct sw_flow_match match
;
919 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
921 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
923 /* Must have key and actions. */
925 if (!a
[OVS_FLOW_ATTR_KEY
]) {
926 OVS_NLERR(log
, "Flow key attr not present in new flow.");
929 if (!a
[OVS_FLOW_ATTR_ACTIONS
]) {
930 OVS_NLERR(log
, "Flow actions attr not present in new flow.");
934 /* Most of the time we need to allocate a new flow, do it before
937 new_flow
= ovs_flow_alloc();
938 if (IS_ERR(new_flow
)) {
939 error
= PTR_ERR(new_flow
);
944 ovs_match_init(&match
, &key
, &mask
);
945 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
946 a
[OVS_FLOW_ATTR_MASK
], log
);
950 ovs_flow_mask_key(&new_flow
->key
, &key
, true, &mask
);
952 /* Extract flow identifier. */
953 error
= ovs_nla_get_identifier(&new_flow
->id
, a
[OVS_FLOW_ATTR_UFID
],
958 /* Validate actions. */
959 error
= ovs_nla_copy_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
],
960 &new_flow
->key
, &acts
, log
);
962 OVS_NLERR(log
, "Flow actions may not be safe on all matching packets.");
966 reply
= ovs_flow_cmd_alloc_info(acts
, &new_flow
->id
, info
, false,
969 error
= PTR_ERR(reply
);
974 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
980 /* Check if this is a duplicate flow */
981 if (ovs_identifier_is_ufid(&new_flow
->id
))
982 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &new_flow
->id
);
984 flow
= ovs_flow_tbl_lookup(&dp
->table
, &key
);
986 rcu_assign_pointer(new_flow
->sf_acts
, acts
);
988 /* Put flow in bucket. */
989 error
= ovs_flow_tbl_insert(&dp
->table
, new_flow
, &mask
);
990 if (unlikely(error
)) {
995 if (unlikely(reply
)) {
996 error
= ovs_flow_cmd_fill_info(new_flow
,
997 ovs_header
->dp_ifindex
,
998 reply
, info
->snd_portid
,
1006 struct sw_flow_actions
*old_acts
;
1008 /* Bail out if we're not allowed to modify an existing flow.
1009 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1010 * because Generic Netlink treats the latter as a dump
1011 * request. We also accept NLM_F_EXCL in case that bug ever
1014 if (unlikely(info
->nlhdr
->nlmsg_flags
& (NLM_F_CREATE
1017 goto err_unlock_ovs
;
1019 /* The flow identifier has to be the same for flow updates.
1020 * Look for any overlapping flow.
1022 if (unlikely(!ovs_flow_cmp(flow
, &match
))) {
1023 if (ovs_identifier_is_key(&flow
->id
))
1024 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
,
1026 else /* UFID matches but key is different */
1030 goto err_unlock_ovs
;
1033 /* Update actions. */
1034 old_acts
= ovsl_dereference(flow
->sf_acts
);
1035 rcu_assign_pointer(flow
->sf_acts
, acts
);
1037 if (unlikely(reply
)) {
1038 error
= ovs_flow_cmd_fill_info(flow
,
1039 ovs_header
->dp_ifindex
,
1040 reply
, info
->snd_portid
,
1048 ovs_nla_free_flow_actions_rcu(old_acts
);
1049 ovs_flow_free(new_flow
, false);
1053 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1060 ovs_nla_free_flow_actions(acts
);
1062 ovs_flow_free(new_flow
, false);
1067 /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */
1068 static struct sw_flow_actions
*get_flow_actions(struct net
*net
,
1069 const struct nlattr
*a
,
1070 const struct sw_flow_key
*key
,
1071 const struct sw_flow_mask
*mask
,
1074 struct sw_flow_actions
*acts
;
1075 struct sw_flow_key masked_key
;
1078 ovs_flow_mask_key(&masked_key
, key
, true, mask
);
1079 error
= ovs_nla_copy_actions(net
, a
, &masked_key
, &acts
, log
);
1082 "Actions may not be safe on all matching packets");
1083 return ERR_PTR(error
);
1089 static int ovs_flow_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1091 struct net
*net
= sock_net(skb
->sk
);
1092 struct nlattr
**a
= info
->attrs
;
1093 struct ovs_header
*ovs_header
= info
->userhdr
;
1094 struct sw_flow_key key
;
1095 struct sw_flow
*flow
;
1096 struct sw_flow_mask mask
;
1097 struct sk_buff
*reply
= NULL
;
1098 struct datapath
*dp
;
1099 struct sw_flow_actions
*old_acts
= NULL
, *acts
= NULL
;
1100 struct sw_flow_match match
;
1101 struct sw_flow_id sfid
;
1102 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1104 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1109 if (!a
[OVS_FLOW_ATTR_KEY
]) {
1110 OVS_NLERR(log
, "Flow key attribute not present in set flow.");
1114 ufid_present
= ovs_nla_get_ufid(&sfid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1115 ovs_match_init(&match
, &key
, &mask
);
1116 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1117 a
[OVS_FLOW_ATTR_MASK
], log
);
1121 /* Validate actions. */
1122 if (a
[OVS_FLOW_ATTR_ACTIONS
]) {
1123 acts
= get_flow_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
], &key
,
1126 error
= PTR_ERR(acts
);
1130 /* Can allocate before locking if have acts. */
1131 reply
= ovs_flow_cmd_alloc_info(acts
, &sfid
, info
, false,
1133 if (IS_ERR(reply
)) {
1134 error
= PTR_ERR(reply
);
1135 goto err_kfree_acts
;
1140 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1141 if (unlikely(!dp
)) {
1143 goto err_unlock_ovs
;
1145 /* Check that the flow exists. */
1147 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &sfid
);
1149 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1150 if (unlikely(!flow
)) {
1152 goto err_unlock_ovs
;
1155 /* Update actions, if present. */
1157 old_acts
= ovsl_dereference(flow
->sf_acts
);
1158 rcu_assign_pointer(flow
->sf_acts
, acts
);
1160 if (unlikely(reply
)) {
1161 error
= ovs_flow_cmd_fill_info(flow
,
1162 ovs_header
->dp_ifindex
,
1163 reply
, info
->snd_portid
,
1170 /* Could not alloc without acts before locking. */
1171 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
,
1172 info
, OVS_FLOW_CMD_NEW
, false,
1175 if (IS_ERR(reply
)) {
1176 error
= PTR_ERR(reply
);
1177 goto err_unlock_ovs
;
1182 if (a
[OVS_FLOW_ATTR_CLEAR
])
1183 ovs_flow_stats_clear(flow
);
1187 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1189 ovs_nla_free_flow_actions_rcu(old_acts
);
1197 ovs_nla_free_flow_actions(acts
);
1202 static int ovs_flow_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1204 struct nlattr
**a
= info
->attrs
;
1205 struct ovs_header
*ovs_header
= info
->userhdr
;
1206 struct net
*net
= sock_net(skb
->sk
);
1207 struct sw_flow_key key
;
1208 struct sk_buff
*reply
;
1209 struct sw_flow
*flow
;
1210 struct datapath
*dp
;
1211 struct sw_flow_match match
;
1212 struct sw_flow_id ufid
;
1213 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1215 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1218 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1219 if (a
[OVS_FLOW_ATTR_KEY
]) {
1220 ovs_match_init(&match
, &key
, NULL
);
1221 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
], NULL
,
1223 } else if (!ufid_present
) {
1225 "Flow get message rejected, Key attribute missing.");
1232 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1239 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1241 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1247 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
, info
,
1248 OVS_FLOW_CMD_NEW
, true, ufid_flags
);
1249 if (IS_ERR(reply
)) {
1250 err
= PTR_ERR(reply
);
1255 return genlmsg_reply(reply
, info
);
1261 static int ovs_flow_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1263 struct nlattr
**a
= info
->attrs
;
1264 struct ovs_header
*ovs_header
= info
->userhdr
;
1265 struct net
*net
= sock_net(skb
->sk
);
1266 struct sw_flow_key key
;
1267 struct sk_buff
*reply
;
1268 struct sw_flow
*flow
= NULL
;
1269 struct datapath
*dp
;
1270 struct sw_flow_match match
;
1271 struct sw_flow_id ufid
;
1272 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1274 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1277 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1278 if (a
[OVS_FLOW_ATTR_KEY
]) {
1279 ovs_match_init(&match
, &key
, NULL
);
1280 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1287 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1288 if (unlikely(!dp
)) {
1293 if (unlikely(!a
[OVS_FLOW_ATTR_KEY
] && !ufid_present
)) {
1294 err
= ovs_flow_tbl_flush(&dp
->table
);
1299 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1301 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1302 if (unlikely(!flow
)) {
1307 ovs_flow_tbl_remove(&dp
->table
, flow
);
1310 reply
= ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force
*) flow
->sf_acts
,
1311 &flow
->id
, info
, false, ufid_flags
);
1312 if (likely(reply
)) {
1313 if (likely(!IS_ERR(reply
))) {
1314 rcu_read_lock(); /*To keep RCU checker happy. */
1315 err
= ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
,
1316 reply
, info
->snd_portid
,
1323 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1325 netlink_set_err(sock_net(skb
->sk
)->genl_sock
, 0, 0, PTR_ERR(reply
));
1329 ovs_flow_free(flow
, true);
1336 static int ovs_flow_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1338 struct nlattr
*a
[__OVS_FLOW_ATTR_MAX
];
1339 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1340 struct table_instance
*ti
;
1341 struct datapath
*dp
;
1345 err
= genlmsg_parse(cb
->nlh
, &dp_flow_genl_family
, a
,
1346 OVS_FLOW_ATTR_MAX
, flow_policy
);
1349 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1352 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1358 ti
= rcu_dereference(dp
->table
.ti
);
1360 struct sw_flow
*flow
;
1363 bucket
= cb
->args
[0];
1365 flow
= ovs_flow_tbl_dump_next(ti
, &bucket
, &obj
);
1369 if (ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
, skb
,
1370 NETLINK_CB(cb
->skb
).portid
,
1371 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1372 OVS_FLOW_CMD_NEW
, ufid_flags
) < 0)
1375 cb
->args
[0] = bucket
;
1382 static const struct nla_policy flow_policy
[OVS_FLOW_ATTR_MAX
+ 1] = {
1383 [OVS_FLOW_ATTR_KEY
] = { .type
= NLA_NESTED
},
1384 [OVS_FLOW_ATTR_MASK
] = { .type
= NLA_NESTED
},
1385 [OVS_FLOW_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
1386 [OVS_FLOW_ATTR_CLEAR
] = { .type
= NLA_FLAG
},
1387 [OVS_FLOW_ATTR_PROBE
] = { .type
= NLA_FLAG
},
1388 [OVS_FLOW_ATTR_UFID
] = { .type
= NLA_UNSPEC
, .len
= 1 },
1389 [OVS_FLOW_ATTR_UFID_FLAGS
] = { .type
= NLA_U32
},
1392 static const struct genl_ops dp_flow_genl_ops
[] = {
1393 { .cmd
= OVS_FLOW_CMD_NEW
,
1394 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1395 .policy
= flow_policy
,
1396 .doit
= ovs_flow_cmd_new
1398 { .cmd
= OVS_FLOW_CMD_DEL
,
1399 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1400 .policy
= flow_policy
,
1401 .doit
= ovs_flow_cmd_del
1403 { .cmd
= OVS_FLOW_CMD_GET
,
1404 .flags
= 0, /* OK for unprivileged users. */
1405 .policy
= flow_policy
,
1406 .doit
= ovs_flow_cmd_get
,
1407 .dumpit
= ovs_flow_cmd_dump
1409 { .cmd
= OVS_FLOW_CMD_SET
,
1410 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1411 .policy
= flow_policy
,
1412 .doit
= ovs_flow_cmd_set
,
1416 static struct genl_family dp_flow_genl_family
= {
1417 .id
= GENL_ID_GENERATE
,
1418 .hdrsize
= sizeof(struct ovs_header
),
1419 .name
= OVS_FLOW_FAMILY
,
1420 .version
= OVS_FLOW_VERSION
,
1421 .maxattr
= OVS_FLOW_ATTR_MAX
,
1423 .parallel_ops
= true,
1424 .ops
= dp_flow_genl_ops
,
1425 .n_ops
= ARRAY_SIZE(dp_flow_genl_ops
),
1426 .mcgrps
= &ovs_dp_flow_multicast_group
,
1430 static size_t ovs_dp_cmd_msg_size(void)
1432 size_t msgsize
= NLMSG_ALIGN(sizeof(struct ovs_header
));
1434 msgsize
+= nla_total_size(IFNAMSIZ
);
1435 msgsize
+= nla_total_size(sizeof(struct ovs_dp_stats
));
1436 msgsize
+= nla_total_size(sizeof(struct ovs_dp_megaflow_stats
));
1437 msgsize
+= nla_total_size(sizeof(u32
)); /* OVS_DP_ATTR_USER_FEATURES */
1442 /* Called with ovs_mutex. */
1443 static int ovs_dp_cmd_fill_info(struct datapath
*dp
, struct sk_buff
*skb
,
1444 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1446 struct ovs_header
*ovs_header
;
1447 struct ovs_dp_stats dp_stats
;
1448 struct ovs_dp_megaflow_stats dp_megaflow_stats
;
1451 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_datapath_genl_family
,
1456 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
1458 err
= nla_put_string(skb
, OVS_DP_ATTR_NAME
, ovs_dp_name(dp
));
1460 goto nla_put_failure
;
1462 get_dp_stats(dp
, &dp_stats
, &dp_megaflow_stats
);
1463 if (nla_put(skb
, OVS_DP_ATTR_STATS
, sizeof(struct ovs_dp_stats
),
1465 goto nla_put_failure
;
1467 if (nla_put(skb
, OVS_DP_ATTR_MEGAFLOW_STATS
,
1468 sizeof(struct ovs_dp_megaflow_stats
),
1469 &dp_megaflow_stats
))
1470 goto nla_put_failure
;
1472 if (nla_put_u32(skb
, OVS_DP_ATTR_USER_FEATURES
, dp
->user_features
))
1473 goto nla_put_failure
;
1475 genlmsg_end(skb
, ovs_header
);
1479 genlmsg_cancel(skb
, ovs_header
);
1484 static struct sk_buff
*ovs_dp_cmd_alloc_info(struct genl_info
*info
)
1486 return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info
, GFP_KERNEL
);
1489 /* Called with rcu_read_lock or ovs_mutex. */
1490 static struct datapath
*lookup_datapath(struct net
*net
,
1491 const struct ovs_header
*ovs_header
,
1492 struct nlattr
*a
[OVS_DP_ATTR_MAX
+ 1])
1494 struct datapath
*dp
;
1496 if (!a
[OVS_DP_ATTR_NAME
])
1497 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1499 struct vport
*vport
;
1501 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_DP_ATTR_NAME
]));
1502 dp
= vport
&& vport
->port_no
== OVSP_LOCAL
? vport
->dp
: NULL
;
1504 return dp
? dp
: ERR_PTR(-ENODEV
);
1507 static void ovs_dp_reset_user_features(struct sk_buff
*skb
, struct genl_info
*info
)
1509 struct datapath
*dp
;
1511 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1515 WARN(dp
->user_features
, "Dropping previously announced user features\n");
1516 dp
->user_features
= 0;
1519 static void ovs_dp_change(struct datapath
*dp
, struct nlattr
*a
[])
1521 if (a
[OVS_DP_ATTR_USER_FEATURES
])
1522 dp
->user_features
= nla_get_u32(a
[OVS_DP_ATTR_USER_FEATURES
]);
1525 static int ovs_dp_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1527 struct nlattr
**a
= info
->attrs
;
1528 struct vport_parms parms
;
1529 struct sk_buff
*reply
;
1530 struct datapath
*dp
;
1531 struct vport
*vport
;
1532 struct ovs_net
*ovs_net
;
1536 if (!a
[OVS_DP_ATTR_NAME
] || !a
[OVS_DP_ATTR_UPCALL_PID
])
1539 reply
= ovs_dp_cmd_alloc_info(info
);
1544 dp
= kzalloc(sizeof(*dp
), GFP_KERNEL
);
1546 goto err_free_reply
;
1548 ovs_dp_set_net(dp
, sock_net(skb
->sk
));
1550 /* Allocate table. */
1551 err
= ovs_flow_tbl_init(&dp
->table
);
1555 dp
->stats_percpu
= netdev_alloc_pcpu_stats(struct dp_stats_percpu
);
1556 if (!dp
->stats_percpu
) {
1558 goto err_destroy_table
;
1561 dp
->ports
= kmalloc(DP_VPORT_HASH_BUCKETS
* sizeof(struct hlist_head
),
1565 goto err_destroy_percpu
;
1568 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1569 INIT_HLIST_HEAD(&dp
->ports
[i
]);
1571 /* Set up our datapath device. */
1572 parms
.name
= nla_data(a
[OVS_DP_ATTR_NAME
]);
1573 parms
.type
= OVS_VPORT_TYPE_INTERNAL
;
1574 parms
.options
= NULL
;
1576 parms
.port_no
= OVSP_LOCAL
;
1577 parms
.upcall_portids
= a
[OVS_DP_ATTR_UPCALL_PID
];
1579 ovs_dp_change(dp
, a
);
1581 /* So far only local changes have been made, now need the lock. */
1584 vport
= new_vport(&parms
);
1585 if (IS_ERR(vport
)) {
1586 err
= PTR_ERR(vport
);
1590 if (err
== -EEXIST
) {
1591 /* An outdated user space instance that does not understand
1592 * the concept of user_features has attempted to create a new
1593 * datapath and is likely to reuse it. Drop all user features.
1595 if (info
->genlhdr
->version
< OVS_DP_VER_FEATURES
)
1596 ovs_dp_reset_user_features(skb
, info
);
1599 goto err_destroy_ports_array
;
1602 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1603 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1606 ovs_net
= net_generic(ovs_dp_get_net(dp
), ovs_net_id
);
1607 list_add_tail_rcu(&dp
->list_node
, &ovs_net
->dps
);
1611 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1614 err_destroy_ports_array
:
1618 free_percpu(dp
->stats_percpu
);
1620 ovs_flow_tbl_destroy(&dp
->table
);
1629 /* Called with ovs_mutex. */
1630 static void __dp_destroy(struct datapath
*dp
)
1634 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1635 struct vport
*vport
;
1636 struct hlist_node
*n
;
1638 hlist_for_each_entry_safe(vport
, n
, &dp
->ports
[i
], dp_hash_node
)
1639 if (vport
->port_no
!= OVSP_LOCAL
)
1640 ovs_dp_detach_port(vport
);
1643 list_del_rcu(&dp
->list_node
);
1645 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1646 * all ports in datapath are destroyed first before freeing datapath.
1648 ovs_dp_detach_port(ovs_vport_ovsl(dp
, OVSP_LOCAL
));
1650 /* RCU destroy the flow table */
1651 call_rcu(&dp
->rcu
, destroy_dp_rcu
);
1654 static int ovs_dp_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1656 struct sk_buff
*reply
;
1657 struct datapath
*dp
;
1660 reply
= ovs_dp_cmd_alloc_info(info
);
1665 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1668 goto err_unlock_free
;
1670 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1671 info
->snd_seq
, 0, OVS_DP_CMD_DEL
);
1677 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1687 static int ovs_dp_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1689 struct sk_buff
*reply
;
1690 struct datapath
*dp
;
1693 reply
= ovs_dp_cmd_alloc_info(info
);
1698 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1701 goto err_unlock_free
;
1703 ovs_dp_change(dp
, info
->attrs
);
1705 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1706 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1710 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1720 static int ovs_dp_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1722 struct sk_buff
*reply
;
1723 struct datapath
*dp
;
1726 reply
= ovs_dp_cmd_alloc_info(info
);
1731 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1734 goto err_unlock_free
;
1736 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1737 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1741 return genlmsg_reply(reply
, info
);
1749 static int ovs_dp_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1751 struct ovs_net
*ovs_net
= net_generic(sock_net(skb
->sk
), ovs_net_id
);
1752 struct datapath
*dp
;
1753 int skip
= cb
->args
[0];
1757 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
1759 ovs_dp_cmd_fill_info(dp
, skb
, NETLINK_CB(cb
->skb
).portid
,
1760 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1761 OVS_DP_CMD_NEW
) < 0)
1772 static const struct nla_policy datapath_policy
[OVS_DP_ATTR_MAX
+ 1] = {
1773 [OVS_DP_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1774 [OVS_DP_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1775 [OVS_DP_ATTR_USER_FEATURES
] = { .type
= NLA_U32
},
1778 static const struct genl_ops dp_datapath_genl_ops
[] = {
1779 { .cmd
= OVS_DP_CMD_NEW
,
1780 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1781 .policy
= datapath_policy
,
1782 .doit
= ovs_dp_cmd_new
1784 { .cmd
= OVS_DP_CMD_DEL
,
1785 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1786 .policy
= datapath_policy
,
1787 .doit
= ovs_dp_cmd_del
1789 { .cmd
= OVS_DP_CMD_GET
,
1790 .flags
= 0, /* OK for unprivileged users. */
1791 .policy
= datapath_policy
,
1792 .doit
= ovs_dp_cmd_get
,
1793 .dumpit
= ovs_dp_cmd_dump
1795 { .cmd
= OVS_DP_CMD_SET
,
1796 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1797 .policy
= datapath_policy
,
1798 .doit
= ovs_dp_cmd_set
,
1802 static struct genl_family dp_datapath_genl_family
= {
1803 .id
= GENL_ID_GENERATE
,
1804 .hdrsize
= sizeof(struct ovs_header
),
1805 .name
= OVS_DATAPATH_FAMILY
,
1806 .version
= OVS_DATAPATH_VERSION
,
1807 .maxattr
= OVS_DP_ATTR_MAX
,
1809 .parallel_ops
= true,
1810 .ops
= dp_datapath_genl_ops
,
1811 .n_ops
= ARRAY_SIZE(dp_datapath_genl_ops
),
1812 .mcgrps
= &ovs_dp_datapath_multicast_group
,
1816 /* Called with ovs_mutex or RCU read lock. */
1817 static int ovs_vport_cmd_fill_info(struct vport
*vport
, struct sk_buff
*skb
,
1818 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1820 struct ovs_header
*ovs_header
;
1821 struct ovs_vport_stats vport_stats
;
1824 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_vport_genl_family
,
1829 ovs_header
->dp_ifindex
= get_dpifindex(vport
->dp
);
1831 if (nla_put_u32(skb
, OVS_VPORT_ATTR_PORT_NO
, vport
->port_no
) ||
1832 nla_put_u32(skb
, OVS_VPORT_ATTR_TYPE
, vport
->ops
->type
) ||
1833 nla_put_string(skb
, OVS_VPORT_ATTR_NAME
,
1834 ovs_vport_name(vport
)))
1835 goto nla_put_failure
;
1837 ovs_vport_get_stats(vport
, &vport_stats
);
1838 if (nla_put(skb
, OVS_VPORT_ATTR_STATS
, sizeof(struct ovs_vport_stats
),
1840 goto nla_put_failure
;
1842 if (ovs_vport_get_upcall_portids(vport
, skb
))
1843 goto nla_put_failure
;
1845 err
= ovs_vport_get_options(vport
, skb
);
1846 if (err
== -EMSGSIZE
)
1849 genlmsg_end(skb
, ovs_header
);
1855 genlmsg_cancel(skb
, ovs_header
);
1859 static struct sk_buff
*ovs_vport_cmd_alloc_info(void)
1861 return nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1864 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1865 struct sk_buff
*ovs_vport_cmd_build_info(struct vport
*vport
, u32 portid
,
1868 struct sk_buff
*skb
;
1871 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
1873 return ERR_PTR(-ENOMEM
);
1875 retval
= ovs_vport_cmd_fill_info(vport
, skb
, portid
, seq
, 0, cmd
);
1881 /* Called with ovs_mutex or RCU read lock. */
1882 static struct vport
*lookup_vport(struct net
*net
,
1883 const struct ovs_header
*ovs_header
,
1884 struct nlattr
*a
[OVS_VPORT_ATTR_MAX
+ 1])
1886 struct datapath
*dp
;
1887 struct vport
*vport
;
1889 if (a
[OVS_VPORT_ATTR_NAME
]) {
1890 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_VPORT_ATTR_NAME
]));
1892 return ERR_PTR(-ENODEV
);
1893 if (ovs_header
->dp_ifindex
&&
1894 ovs_header
->dp_ifindex
!= get_dpifindex(vport
->dp
))
1895 return ERR_PTR(-ENODEV
);
1897 } else if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
1898 u32 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1900 if (port_no
>= DP_MAX_PORTS
)
1901 return ERR_PTR(-EFBIG
);
1903 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1905 return ERR_PTR(-ENODEV
);
1907 vport
= ovs_vport_ovsl_rcu(dp
, port_no
);
1909 return ERR_PTR(-ENODEV
);
1912 return ERR_PTR(-EINVAL
);
1915 static int ovs_vport_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1917 struct nlattr
**a
= info
->attrs
;
1918 struct ovs_header
*ovs_header
= info
->userhdr
;
1919 struct vport_parms parms
;
1920 struct sk_buff
*reply
;
1921 struct vport
*vport
;
1922 struct datapath
*dp
;
1926 if (!a
[OVS_VPORT_ATTR_NAME
] || !a
[OVS_VPORT_ATTR_TYPE
] ||
1927 !a
[OVS_VPORT_ATTR_UPCALL_PID
])
1930 port_no
= a
[OVS_VPORT_ATTR_PORT_NO
]
1931 ? nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]) : 0;
1932 if (port_no
>= DP_MAX_PORTS
)
1935 reply
= ovs_vport_cmd_alloc_info();
1941 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1944 goto exit_unlock_free
;
1947 vport
= ovs_vport_ovsl(dp
, port_no
);
1950 goto exit_unlock_free
;
1952 for (port_no
= 1; ; port_no
++) {
1953 if (port_no
>= DP_MAX_PORTS
) {
1955 goto exit_unlock_free
;
1957 vport
= ovs_vport_ovsl(dp
, port_no
);
1963 parms
.name
= nla_data(a
[OVS_VPORT_ATTR_NAME
]);
1964 parms
.type
= nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]);
1965 parms
.options
= a
[OVS_VPORT_ATTR_OPTIONS
];
1967 parms
.port_no
= port_no
;
1968 parms
.upcall_portids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
1970 vport
= new_vport(&parms
);
1971 err
= PTR_ERR(vport
);
1972 if (IS_ERR(vport
)) {
1975 goto exit_unlock_free
;
1978 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
1979 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
1983 ovs_notify(&dp_vport_genl_family
, reply
, info
);
1992 static int ovs_vport_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1994 struct nlattr
**a
= info
->attrs
;
1995 struct sk_buff
*reply
;
1996 struct vport
*vport
;
1999 reply
= ovs_vport_cmd_alloc_info();
2004 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2005 err
= PTR_ERR(vport
);
2007 goto exit_unlock_free
;
2009 if (a
[OVS_VPORT_ATTR_TYPE
] &&
2010 nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]) != vport
->ops
->type
) {
2012 goto exit_unlock_free
;
2015 if (a
[OVS_VPORT_ATTR_OPTIONS
]) {
2016 err
= ovs_vport_set_options(vport
, a
[OVS_VPORT_ATTR_OPTIONS
]);
2018 goto exit_unlock_free
;
2022 if (a
[OVS_VPORT_ATTR_UPCALL_PID
]) {
2023 struct nlattr
*ids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2025 err
= ovs_vport_set_upcall_portids(vport
, ids
);
2027 goto exit_unlock_free
;
2030 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2031 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2035 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2044 static int ovs_vport_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
2046 struct nlattr
**a
= info
->attrs
;
2047 struct sk_buff
*reply
;
2048 struct vport
*vport
;
2051 reply
= ovs_vport_cmd_alloc_info();
2056 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2057 err
= PTR_ERR(vport
);
2059 goto exit_unlock_free
;
2061 if (vport
->port_no
== OVSP_LOCAL
) {
2063 goto exit_unlock_free
;
2066 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2067 info
->snd_seq
, 0, OVS_VPORT_CMD_DEL
);
2069 ovs_dp_detach_port(vport
);
2072 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2081 static int ovs_vport_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
2083 struct nlattr
**a
= info
->attrs
;
2084 struct ovs_header
*ovs_header
= info
->userhdr
;
2085 struct sk_buff
*reply
;
2086 struct vport
*vport
;
2089 reply
= ovs_vport_cmd_alloc_info();
2094 vport
= lookup_vport(sock_net(skb
->sk
), ovs_header
, a
);
2095 err
= PTR_ERR(vport
);
2097 goto exit_unlock_free
;
2098 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2099 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2103 return genlmsg_reply(reply
, info
);
2111 static int ovs_vport_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2113 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
2114 struct datapath
*dp
;
2115 int bucket
= cb
->args
[0], skip
= cb
->args
[1];
2119 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2124 for (i
= bucket
; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2125 struct vport
*vport
;
2128 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
2130 ovs_vport_cmd_fill_info(vport
, skb
,
2131 NETLINK_CB(cb
->skb
).portid
,
2134 OVS_VPORT_CMD_NEW
) < 0)
2150 static const struct nla_policy vport_policy
[OVS_VPORT_ATTR_MAX
+ 1] = {
2151 [OVS_VPORT_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
2152 [OVS_VPORT_ATTR_STATS
] = { .len
= sizeof(struct ovs_vport_stats
) },
2153 [OVS_VPORT_ATTR_PORT_NO
] = { .type
= NLA_U32
},
2154 [OVS_VPORT_ATTR_TYPE
] = { .type
= NLA_U32
},
2155 [OVS_VPORT_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
2156 [OVS_VPORT_ATTR_OPTIONS
] = { .type
= NLA_NESTED
},
2159 static const struct genl_ops dp_vport_genl_ops
[] = {
2160 { .cmd
= OVS_VPORT_CMD_NEW
,
2161 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2162 .policy
= vport_policy
,
2163 .doit
= ovs_vport_cmd_new
2165 { .cmd
= OVS_VPORT_CMD_DEL
,
2166 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2167 .policy
= vport_policy
,
2168 .doit
= ovs_vport_cmd_del
2170 { .cmd
= OVS_VPORT_CMD_GET
,
2171 .flags
= 0, /* OK for unprivileged users. */
2172 .policy
= vport_policy
,
2173 .doit
= ovs_vport_cmd_get
,
2174 .dumpit
= ovs_vport_cmd_dump
2176 { .cmd
= OVS_VPORT_CMD_SET
,
2177 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2178 .policy
= vport_policy
,
2179 .doit
= ovs_vport_cmd_set
,
2183 struct genl_family dp_vport_genl_family
= {
2184 .id
= GENL_ID_GENERATE
,
2185 .hdrsize
= sizeof(struct ovs_header
),
2186 .name
= OVS_VPORT_FAMILY
,
2187 .version
= OVS_VPORT_VERSION
,
2188 .maxattr
= OVS_VPORT_ATTR_MAX
,
2190 .parallel_ops
= true,
2191 .ops
= dp_vport_genl_ops
,
2192 .n_ops
= ARRAY_SIZE(dp_vport_genl_ops
),
2193 .mcgrps
= &ovs_dp_vport_multicast_group
,
2197 static struct genl_family
* const dp_genl_families
[] = {
2198 &dp_datapath_genl_family
,
2199 &dp_vport_genl_family
,
2200 &dp_flow_genl_family
,
2201 &dp_packet_genl_family
,
2204 static void dp_unregister_genl(int n_families
)
2208 for (i
= 0; i
< n_families
; i
++)
2209 genl_unregister_family(dp_genl_families
[i
]);
2212 static int dp_register_genl(void)
2217 for (i
= 0; i
< ARRAY_SIZE(dp_genl_families
); i
++) {
2219 err
= genl_register_family(dp_genl_families
[i
]);
2227 dp_unregister_genl(i
);
2231 static int __net_init
ovs_init_net(struct net
*net
)
2233 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2235 INIT_LIST_HEAD(&ovs_net
->dps
);
2236 INIT_WORK(&ovs_net
->dp_notify_work
, ovs_dp_notify_wq
);
2241 static void __net_exit
list_vports_from_net(struct net
*net
, struct net
*dnet
,
2242 struct list_head
*head
)
2244 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2245 struct datapath
*dp
;
2247 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
2250 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2251 struct vport
*vport
;
2253 hlist_for_each_entry(vport
, &dp
->ports
[i
], dp_hash_node
) {
2254 if (vport
->ops
->type
!= OVS_VPORT_TYPE_INTERNAL
)
2257 if (dev_net(vport
->dev
) == dnet
)
2258 list_add(&vport
->detach_list
, head
);
2264 static void __net_exit
ovs_exit_net(struct net
*dnet
)
2266 struct datapath
*dp
, *dp_next
;
2267 struct ovs_net
*ovs_net
= net_generic(dnet
, ovs_net_id
);
2268 struct vport
*vport
, *vport_next
;
2274 list_for_each_entry_safe(dp
, dp_next
, &ovs_net
->dps
, list_node
)
2279 list_vports_from_net(net
, dnet
, &head
);
2282 /* Detach all vports from given namespace. */
2283 list_for_each_entry_safe(vport
, vport_next
, &head
, detach_list
) {
2284 list_del(&vport
->detach_list
);
2285 ovs_dp_detach_port(vport
);
2290 cancel_work_sync(&ovs_net
->dp_notify_work
);
2293 static struct pernet_operations ovs_net_ops
= {
2294 .init
= ovs_init_net
,
2295 .exit
= ovs_exit_net
,
2297 .size
= sizeof(struct ovs_net
),
2300 static int __init
dp_init(void)
2304 BUILD_BUG_ON(sizeof(struct ovs_skb_cb
) > FIELD_SIZEOF(struct sk_buff
, cb
));
2306 pr_info("Open vSwitch switching datapath\n");
2308 err
= action_fifos_init();
2312 err
= ovs_internal_dev_rtnl_link_register();
2314 goto error_action_fifos_exit
;
2316 err
= ovs_flow_init();
2318 goto error_unreg_rtnl_link
;
2320 err
= ovs_vport_init();
2322 goto error_flow_exit
;
2324 err
= register_pernet_device(&ovs_net_ops
);
2326 goto error_vport_exit
;
2328 err
= register_netdevice_notifier(&ovs_dp_device_notifier
);
2330 goto error_netns_exit
;
2332 err
= ovs_netdev_init();
2334 goto error_unreg_notifier
;
2336 err
= dp_register_genl();
2338 goto error_unreg_netdev
;
2344 error_unreg_notifier
:
2345 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2347 unregister_pernet_device(&ovs_net_ops
);
2352 error_unreg_rtnl_link
:
2353 ovs_internal_dev_rtnl_link_unregister();
2354 error_action_fifos_exit
:
2355 action_fifos_exit();
2360 static void dp_cleanup(void)
2362 dp_unregister_genl(ARRAY_SIZE(dp_genl_families
));
2364 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2365 unregister_pernet_device(&ovs_net_ops
);
2369 ovs_internal_dev_rtnl_link_unregister();
2370 action_fifos_exit();
2373 module_init(dp_init
);
2374 module_exit(dp_cleanup
);
2376 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2377 MODULE_LICENSE("GPL");