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
*,
142 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*,
143 const struct sw_flow_key
*,
144 const struct dp_upcall_info
*,
147 /* Must be called with rcu_read_lock. */
148 static struct datapath
*get_dp_rcu(struct net
*net
, int dp_ifindex
)
150 struct net_device
*dev
= dev_get_by_index_rcu(net
, dp_ifindex
);
153 struct vport
*vport
= ovs_internal_dev_get_vport(dev
);
161 /* The caller must hold either ovs_mutex or rcu_read_lock to keep the
162 * returned dp pointer valid.
164 static inline struct datapath
*get_dp(struct net
*net
, int dp_ifindex
)
168 WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
170 dp
= get_dp_rcu(net
, dp_ifindex
);
176 /* Must be called with rcu_read_lock or ovs_mutex. */
177 const char *ovs_dp_name(const struct datapath
*dp
)
179 struct vport
*vport
= ovs_vport_ovsl_rcu(dp
, OVSP_LOCAL
);
180 return ovs_vport_name(vport
);
183 static int get_dpifindex(const struct datapath
*dp
)
190 local
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
192 ifindex
= local
->dev
->ifindex
;
201 static void destroy_dp_rcu(struct rcu_head
*rcu
)
203 struct datapath
*dp
= container_of(rcu
, struct datapath
, rcu
);
205 ovs_flow_tbl_destroy(&dp
->table
);
206 free_percpu(dp
->stats_percpu
);
211 static struct hlist_head
*vport_hash_bucket(const struct datapath
*dp
,
214 return &dp
->ports
[port_no
& (DP_VPORT_HASH_BUCKETS
- 1)];
217 /* Called with ovs_mutex or RCU read lock. */
218 struct vport
*ovs_lookup_vport(const struct datapath
*dp
, u16 port_no
)
221 struct hlist_head
*head
;
223 head
= vport_hash_bucket(dp
, port_no
);
224 hlist_for_each_entry_rcu(vport
, head
, dp_hash_node
) {
225 if (vport
->port_no
== port_no
)
231 /* Called with ovs_mutex. */
232 static struct vport
*new_vport(const struct vport_parms
*parms
)
236 vport
= ovs_vport_add(parms
);
237 if (!IS_ERR(vport
)) {
238 struct datapath
*dp
= parms
->dp
;
239 struct hlist_head
*head
= vport_hash_bucket(dp
, vport
->port_no
);
241 hlist_add_head_rcu(&vport
->dp_hash_node
, head
);
246 void ovs_dp_detach_port(struct vport
*p
)
250 /* First drop references to device. */
251 hlist_del_rcu(&p
->dp_hash_node
);
253 /* Then destroy it. */
257 /* Must be called with rcu_read_lock. */
258 void ovs_dp_process_packet(struct sk_buff
*skb
, struct sw_flow_key
*key
)
260 const struct vport
*p
= OVS_CB(skb
)->input_vport
;
261 struct datapath
*dp
= p
->dp
;
262 struct sw_flow
*flow
;
263 struct sw_flow_actions
*sf_acts
;
264 struct dp_stats_percpu
*stats
;
268 stats
= this_cpu_ptr(dp
->stats_percpu
);
271 flow
= ovs_flow_tbl_lookup_stats(&dp
->table
, key
, &n_mask_hit
);
272 if (unlikely(!flow
)) {
273 struct dp_upcall_info upcall
;
276 memset(&upcall
, 0, sizeof(upcall
));
277 upcall
.cmd
= OVS_PACKET_CMD_MISS
;
278 upcall
.portid
= ovs_vport_find_upcall_portid(p
, skb
);
279 upcall
.mru
= OVS_CB(skb
)->mru
;
280 error
= ovs_dp_upcall(dp
, skb
, key
, &upcall
, 0);
285 stats_counter
= &stats
->n_missed
;
289 ovs_flow_stats_update(flow
, key
->tp
.flags
, skb
);
290 sf_acts
= rcu_dereference(flow
->sf_acts
);
291 ovs_execute_actions(dp
, skb
, sf_acts
, key
);
293 stats_counter
= &stats
->n_hit
;
296 /* Update datapath statistics. */
297 u64_stats_update_begin(&stats
->syncp
);
299 stats
->n_mask_hit
+= n_mask_hit
;
300 u64_stats_update_end(&stats
->syncp
);
303 int ovs_dp_upcall(struct datapath
*dp
, struct sk_buff
*skb
,
304 const struct sw_flow_key
*key
,
305 const struct dp_upcall_info
*upcall_info
,
308 struct dp_stats_percpu
*stats
;
311 if (upcall_info
->portid
== 0) {
316 if (!skb_is_gso(skb
))
317 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
319 err
= queue_gso_packets(dp
, skb
, key
, upcall_info
, cutlen
);
326 stats
= this_cpu_ptr(dp
->stats_percpu
);
328 u64_stats_update_begin(&stats
->syncp
);
330 u64_stats_update_end(&stats
->syncp
);
335 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*skb
,
336 const struct sw_flow_key
*key
,
337 const struct dp_upcall_info
*upcall_info
,
340 unsigned short gso_type
= skb_shinfo(skb
)->gso_type
;
341 struct sw_flow_key later_key
;
342 struct sk_buff
*segs
, *nskb
;
345 BUILD_BUG_ON(sizeof(*OVS_CB(skb
)) > SKB_SGO_CB_OFFSET
);
346 segs
= __skb_gso_segment(skb
, NETIF_F_SG
, false);
348 return PTR_ERR(segs
);
352 if (gso_type
& SKB_GSO_UDP
) {
353 /* The initial flow key extracted by ovs_flow_key_extract()
354 * in this case is for a first fragment, so we need to
355 * properly mark later fragments.
358 later_key
.ip
.frag
= OVS_FRAG_TYPE_LATER
;
361 /* Queue all of the segments. */
364 if (gso_type
& SKB_GSO_UDP
&& skb
!= segs
)
367 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
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 */
391 + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */
393 /* OVS_PACKET_ATTR_USERDATA */
394 if (upcall_info
->userdata
)
395 size
+= NLA_ALIGN(upcall_info
->userdata
->nla_len
);
397 /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */
398 if (upcall_info
->egress_tun_info
)
399 size
+= nla_total_size(ovs_tun_key_attr_size());
401 /* OVS_PACKET_ATTR_ACTIONS */
402 if (upcall_info
->actions_len
)
403 size
+= nla_total_size(upcall_info
->actions_len
);
405 /* OVS_PACKET_ATTR_MRU */
406 if (upcall_info
->mru
)
407 size
+= nla_total_size(sizeof(upcall_info
->mru
));
412 static void pad_packet(struct datapath
*dp
, struct sk_buff
*skb
)
414 if (!(dp
->user_features
& OVS_DP_F_UNALIGNED
)) {
415 size_t plen
= NLA_ALIGN(skb
->len
) - skb
->len
;
418 memset(skb_put(skb
, plen
), 0, plen
);
422 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*skb
,
423 const struct sw_flow_key
*key
,
424 const struct dp_upcall_info
*upcall_info
,
427 struct ovs_header
*upcall
;
428 struct sk_buff
*nskb
= NULL
;
429 struct sk_buff
*user_skb
= NULL
; /* to be queued to userspace */
435 dp_ifindex
= get_dpifindex(dp
);
439 if (skb_vlan_tag_present(skb
)) {
440 nskb
= skb_clone(skb
, GFP_ATOMIC
);
444 nskb
= __vlan_hwaccel_push_inside(nskb
);
451 if (nla_attr_size(skb
->len
) > USHRT_MAX
) {
456 /* Complete checksum if needed */
457 if (skb
->ip_summed
== CHECKSUM_PARTIAL
&&
458 (err
= skb_checksum_help(skb
)))
461 /* Older versions of OVS user space enforce alignment of the last
462 * Netlink attribute to NLA_ALIGNTO which would require extensive
463 * padding logic. Only perform zerocopy if padding is not required.
465 if (dp
->user_features
& OVS_DP_F_UNALIGNED
)
466 hlen
= skb_zerocopy_headlen(skb
);
470 len
= upcall_msg_size(upcall_info
, hlen
- cutlen
);
471 user_skb
= genlmsg_new(len
, GFP_ATOMIC
);
477 upcall
= genlmsg_put(user_skb
, 0, 0, &dp_packet_genl_family
,
478 0, upcall_info
->cmd
);
479 upcall
->dp_ifindex
= dp_ifindex
;
481 err
= ovs_nla_put_key(key
, key
, OVS_PACKET_ATTR_KEY
, false, user_skb
);
484 if (upcall_info
->userdata
)
485 __nla_put(user_skb
, OVS_PACKET_ATTR_USERDATA
,
486 nla_len(upcall_info
->userdata
),
487 nla_data(upcall_info
->userdata
));
489 if (upcall_info
->egress_tun_info
) {
490 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_EGRESS_TUN_KEY
);
491 err
= ovs_nla_put_tunnel_info(user_skb
,
492 upcall_info
->egress_tun_info
);
494 nla_nest_end(user_skb
, nla
);
497 if (upcall_info
->actions_len
) {
498 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_ACTIONS
);
499 err
= ovs_nla_put_actions(upcall_info
->actions
,
500 upcall_info
->actions_len
,
503 nla_nest_end(user_skb
, nla
);
505 nla_nest_cancel(user_skb
, nla
);
508 /* Add OVS_PACKET_ATTR_MRU */
509 if (upcall_info
->mru
) {
510 if (nla_put_u16(user_skb
, OVS_PACKET_ATTR_MRU
,
515 pad_packet(dp
, user_skb
);
518 /* Add OVS_PACKET_ATTR_LEN when packet is truncated */
520 if (nla_put_u32(user_skb
, OVS_PACKET_ATTR_LEN
,
525 pad_packet(dp
, user_skb
);
528 /* Only reserve room for attribute header, packet data is added
529 * in skb_zerocopy() */
530 if (!(nla
= nla_reserve(user_skb
, OVS_PACKET_ATTR_PACKET
, 0))) {
534 nla
->nla_len
= nla_attr_size(skb
->len
- cutlen
);
536 err
= skb_zerocopy(user_skb
, skb
, skb
->len
- cutlen
, hlen
);
540 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
541 pad_packet(dp
, user_skb
);
543 ((struct nlmsghdr
*) user_skb
->data
)->nlmsg_len
= user_skb
->len
;
545 err
= genlmsg_unicast(ovs_dp_get_net(dp
), user_skb
, upcall_info
->portid
);
555 static int ovs_packet_cmd_execute(struct sk_buff
*skb
, struct genl_info
*info
)
557 struct ovs_header
*ovs_header
= info
->userhdr
;
558 struct net
*net
= sock_net(skb
->sk
);
559 struct nlattr
**a
= info
->attrs
;
560 struct sw_flow_actions
*acts
;
561 struct sk_buff
*packet
;
562 struct sw_flow
*flow
;
563 struct sw_flow_actions
*sf_acts
;
566 struct vport
*input_vport
;
570 bool log
= !a
[OVS_PACKET_ATTR_PROBE
];
573 if (!a
[OVS_PACKET_ATTR_PACKET
] || !a
[OVS_PACKET_ATTR_KEY
] ||
574 !a
[OVS_PACKET_ATTR_ACTIONS
])
577 len
= nla_len(a
[OVS_PACKET_ATTR_PACKET
]);
578 packet
= __dev_alloc_skb(NET_IP_ALIGN
+ len
, GFP_KERNEL
);
582 skb_reserve(packet
, NET_IP_ALIGN
);
584 nla_memcpy(__skb_put(packet
, len
), a
[OVS_PACKET_ATTR_PACKET
], len
);
586 skb_reset_mac_header(packet
);
587 eth
= eth_hdr(packet
);
589 /* Normally, setting the skb 'protocol' field would be handled by a
590 * call to eth_type_trans(), but it assumes there's a sending
591 * device, which we may not have. */
592 if (eth_proto_is_802_3(eth
->h_proto
))
593 packet
->protocol
= eth
->h_proto
;
595 packet
->protocol
= htons(ETH_P_802_2
);
597 /* Set packet's mru */
598 if (a
[OVS_PACKET_ATTR_MRU
]) {
599 mru
= nla_get_u16(a
[OVS_PACKET_ATTR_MRU
]);
600 packet
->ignore_df
= 1;
602 OVS_CB(packet
)->mru
= mru
;
604 /* Build an sw_flow for sending this packet. */
605 flow
= ovs_flow_alloc();
610 err
= ovs_flow_key_extract_userspace(net
, a
[OVS_PACKET_ATTR_KEY
],
611 packet
, &flow
->key
, log
);
615 err
= ovs_nla_copy_actions(net
, a
[OVS_PACKET_ATTR_ACTIONS
],
616 &flow
->key
, &acts
, log
);
620 rcu_assign_pointer(flow
->sf_acts
, acts
);
621 packet
->priority
= flow
->key
.phy
.priority
;
622 packet
->mark
= flow
->key
.phy
.skb_mark
;
625 dp
= get_dp_rcu(net
, ovs_header
->dp_ifindex
);
630 input_vport
= ovs_vport_rcu(dp
, flow
->key
.phy
.in_port
);
632 input_vport
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
637 packet
->dev
= input_vport
->dev
;
638 OVS_CB(packet
)->input_vport
= input_vport
;
639 sf_acts
= rcu_dereference(flow
->sf_acts
);
642 err
= ovs_execute_actions(dp
, packet
, sf_acts
, &flow
->key
);
646 ovs_flow_free(flow
, false);
652 ovs_flow_free(flow
, false);
659 static const struct nla_policy packet_policy
[OVS_PACKET_ATTR_MAX
+ 1] = {
660 [OVS_PACKET_ATTR_PACKET
] = { .len
= ETH_HLEN
},
661 [OVS_PACKET_ATTR_KEY
] = { .type
= NLA_NESTED
},
662 [OVS_PACKET_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
663 [OVS_PACKET_ATTR_PROBE
] = { .type
= NLA_FLAG
},
664 [OVS_PACKET_ATTR_MRU
] = { .type
= NLA_U16
},
667 static const struct genl_ops dp_packet_genl_ops
[] = {
668 { .cmd
= OVS_PACKET_CMD_EXECUTE
,
669 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
670 .policy
= packet_policy
,
671 .doit
= ovs_packet_cmd_execute
675 static struct genl_family dp_packet_genl_family
= {
676 .id
= GENL_ID_GENERATE
,
677 .hdrsize
= sizeof(struct ovs_header
),
678 .name
= OVS_PACKET_FAMILY
,
679 .version
= OVS_PACKET_VERSION
,
680 .maxattr
= OVS_PACKET_ATTR_MAX
,
682 .parallel_ops
= true,
683 .ops
= dp_packet_genl_ops
,
684 .n_ops
= ARRAY_SIZE(dp_packet_genl_ops
),
687 static void get_dp_stats(const struct datapath
*dp
, struct ovs_dp_stats
*stats
,
688 struct ovs_dp_megaflow_stats
*mega_stats
)
692 memset(mega_stats
, 0, sizeof(*mega_stats
));
694 stats
->n_flows
= ovs_flow_tbl_count(&dp
->table
);
695 mega_stats
->n_masks
= ovs_flow_tbl_num_masks(&dp
->table
);
697 stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
699 for_each_possible_cpu(i
) {
700 const struct dp_stats_percpu
*percpu_stats
;
701 struct dp_stats_percpu local_stats
;
704 percpu_stats
= per_cpu_ptr(dp
->stats_percpu
, i
);
707 start
= u64_stats_fetch_begin_irq(&percpu_stats
->syncp
);
708 local_stats
= *percpu_stats
;
709 } while (u64_stats_fetch_retry_irq(&percpu_stats
->syncp
, start
));
711 stats
->n_hit
+= local_stats
.n_hit
;
712 stats
->n_missed
+= local_stats
.n_missed
;
713 stats
->n_lost
+= local_stats
.n_lost
;
714 mega_stats
->n_mask_hit
+= local_stats
.n_mask_hit
;
718 static bool should_fill_key(const struct sw_flow_id
*sfid
, uint32_t ufid_flags
)
720 return ovs_identifier_is_ufid(sfid
) &&
721 !(ufid_flags
& OVS_UFID_F_OMIT_KEY
);
724 static bool should_fill_mask(uint32_t ufid_flags
)
726 return !(ufid_flags
& OVS_UFID_F_OMIT_MASK
);
729 static bool should_fill_actions(uint32_t ufid_flags
)
731 return !(ufid_flags
& OVS_UFID_F_OMIT_ACTIONS
);
734 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions
*acts
,
735 const struct sw_flow_id
*sfid
,
738 size_t len
= NLMSG_ALIGN(sizeof(struct ovs_header
));
740 /* OVS_FLOW_ATTR_UFID */
741 if (sfid
&& ovs_identifier_is_ufid(sfid
))
742 len
+= nla_total_size(sfid
->ufid_len
);
744 /* OVS_FLOW_ATTR_KEY */
745 if (!sfid
|| should_fill_key(sfid
, ufid_flags
))
746 len
+= nla_total_size(ovs_key_attr_size());
748 /* OVS_FLOW_ATTR_MASK */
749 if (should_fill_mask(ufid_flags
))
750 len
+= nla_total_size(ovs_key_attr_size());
752 /* OVS_FLOW_ATTR_ACTIONS */
753 if (should_fill_actions(ufid_flags
))
754 len
+= nla_total_size(acts
->orig_len
);
757 + nla_total_size_64bit(sizeof(struct ovs_flow_stats
)) /* OVS_FLOW_ATTR_STATS */
758 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
759 + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */
762 /* Called with ovs_mutex or RCU read lock. */
763 static int ovs_flow_cmd_fill_stats(const struct sw_flow
*flow
,
766 struct ovs_flow_stats stats
;
770 ovs_flow_stats_get(flow
, &stats
, &used
, &tcp_flags
);
773 nla_put_u64_64bit(skb
, OVS_FLOW_ATTR_USED
, ovs_flow_used_time(used
),
777 if (stats
.n_packets
&&
778 nla_put_64bit(skb
, OVS_FLOW_ATTR_STATS
,
779 sizeof(struct ovs_flow_stats
), &stats
,
783 if ((u8
)ntohs(tcp_flags
) &&
784 nla_put_u8(skb
, OVS_FLOW_ATTR_TCP_FLAGS
, (u8
)ntohs(tcp_flags
)))
790 /* Called with ovs_mutex or RCU read lock. */
791 static int ovs_flow_cmd_fill_actions(const struct sw_flow
*flow
,
792 struct sk_buff
*skb
, int skb_orig_len
)
794 struct nlattr
*start
;
797 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
798 * this is the first flow to be dumped into 'skb'. This is unusual for
799 * Netlink but individual action lists can be longer than
800 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
801 * The userspace caller can always fetch the actions separately if it
802 * really wants them. (Most userspace callers in fact don't care.)
804 * This can only fail for dump operations because the skb is always
805 * properly sized for single flows.
807 start
= nla_nest_start(skb
, OVS_FLOW_ATTR_ACTIONS
);
809 const struct sw_flow_actions
*sf_acts
;
811 sf_acts
= rcu_dereference_ovsl(flow
->sf_acts
);
812 err
= ovs_nla_put_actions(sf_acts
->actions
,
813 sf_acts
->actions_len
, skb
);
816 nla_nest_end(skb
, start
);
821 nla_nest_cancel(skb
, start
);
823 } else if (skb_orig_len
) {
830 /* Called with ovs_mutex or RCU read lock. */
831 static int ovs_flow_cmd_fill_info(const struct sw_flow
*flow
, int dp_ifindex
,
832 struct sk_buff
*skb
, u32 portid
,
833 u32 seq
, u32 flags
, u8 cmd
, u32 ufid_flags
)
835 const int skb_orig_len
= skb
->len
;
836 struct ovs_header
*ovs_header
;
839 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_flow_genl_family
,
844 ovs_header
->dp_ifindex
= dp_ifindex
;
846 err
= ovs_nla_put_identifier(flow
, skb
);
850 if (should_fill_key(&flow
->id
, ufid_flags
)) {
851 err
= ovs_nla_put_masked_key(flow
, skb
);
856 if (should_fill_mask(ufid_flags
)) {
857 err
= ovs_nla_put_mask(flow
, skb
);
862 err
= ovs_flow_cmd_fill_stats(flow
, skb
);
866 if (should_fill_actions(ufid_flags
)) {
867 err
= ovs_flow_cmd_fill_actions(flow
, skb
, skb_orig_len
);
872 genlmsg_end(skb
, ovs_header
);
876 genlmsg_cancel(skb
, ovs_header
);
880 /* May not be called with RCU read lock. */
881 static struct sk_buff
*ovs_flow_cmd_alloc_info(const struct sw_flow_actions
*acts
,
882 const struct sw_flow_id
*sfid
,
883 struct genl_info
*info
,
890 if (!always
&& !ovs_must_notify(&dp_flow_genl_family
, info
, 0))
893 len
= ovs_flow_cmd_msg_size(acts
, sfid
, ufid_flags
);
894 skb
= genlmsg_new(len
, GFP_KERNEL
);
896 return ERR_PTR(-ENOMEM
);
901 /* Called with ovs_mutex. */
902 static struct sk_buff
*ovs_flow_cmd_build_info(const struct sw_flow
*flow
,
904 struct genl_info
*info
, u8 cmd
,
905 bool always
, u32 ufid_flags
)
910 skb
= ovs_flow_cmd_alloc_info(ovsl_dereference(flow
->sf_acts
),
911 &flow
->id
, info
, always
, ufid_flags
);
912 if (IS_ERR_OR_NULL(skb
))
915 retval
= ovs_flow_cmd_fill_info(flow
, dp_ifindex
, skb
,
916 info
->snd_portid
, info
->snd_seq
, 0,
922 static int ovs_flow_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
924 struct net
*net
= sock_net(skb
->sk
);
925 struct nlattr
**a
= info
->attrs
;
926 struct ovs_header
*ovs_header
= info
->userhdr
;
927 struct sw_flow
*flow
= NULL
, *new_flow
;
928 struct sw_flow_mask mask
;
929 struct sk_buff
*reply
;
931 struct sw_flow_key key
;
932 struct sw_flow_actions
*acts
;
933 struct sw_flow_match match
;
934 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
936 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
938 /* Must have key and actions. */
940 if (!a
[OVS_FLOW_ATTR_KEY
]) {
941 OVS_NLERR(log
, "Flow key attr not present in new flow.");
944 if (!a
[OVS_FLOW_ATTR_ACTIONS
]) {
945 OVS_NLERR(log
, "Flow actions attr not present in new flow.");
949 /* Most of the time we need to allocate a new flow, do it before
952 new_flow
= ovs_flow_alloc();
953 if (IS_ERR(new_flow
)) {
954 error
= PTR_ERR(new_flow
);
959 ovs_match_init(&match
, &key
, &mask
);
960 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
961 a
[OVS_FLOW_ATTR_MASK
], log
);
965 ovs_flow_mask_key(&new_flow
->key
, &key
, true, &mask
);
967 /* Extract flow identifier. */
968 error
= ovs_nla_get_identifier(&new_flow
->id
, a
[OVS_FLOW_ATTR_UFID
],
973 /* Validate actions. */
974 error
= ovs_nla_copy_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
],
975 &new_flow
->key
, &acts
, log
);
977 OVS_NLERR(log
, "Flow actions may not be safe on all matching packets.");
981 reply
= ovs_flow_cmd_alloc_info(acts
, &new_flow
->id
, info
, false,
984 error
= PTR_ERR(reply
);
989 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
995 /* Check if this is a duplicate flow */
996 if (ovs_identifier_is_ufid(&new_flow
->id
))
997 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &new_flow
->id
);
999 flow
= ovs_flow_tbl_lookup(&dp
->table
, &key
);
1000 if (likely(!flow
)) {
1001 rcu_assign_pointer(new_flow
->sf_acts
, acts
);
1003 /* Put flow in bucket. */
1004 error
= ovs_flow_tbl_insert(&dp
->table
, new_flow
, &mask
);
1005 if (unlikely(error
)) {
1007 goto err_unlock_ovs
;
1010 if (unlikely(reply
)) {
1011 error
= ovs_flow_cmd_fill_info(new_flow
,
1012 ovs_header
->dp_ifindex
,
1013 reply
, info
->snd_portid
,
1021 struct sw_flow_actions
*old_acts
;
1023 /* Bail out if we're not allowed to modify an existing flow.
1024 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1025 * because Generic Netlink treats the latter as a dump
1026 * request. We also accept NLM_F_EXCL in case that bug ever
1029 if (unlikely(info
->nlhdr
->nlmsg_flags
& (NLM_F_CREATE
1032 goto err_unlock_ovs
;
1034 /* The flow identifier has to be the same for flow updates.
1035 * Look for any overlapping flow.
1037 if (unlikely(!ovs_flow_cmp(flow
, &match
))) {
1038 if (ovs_identifier_is_key(&flow
->id
))
1039 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
,
1041 else /* UFID matches but key is different */
1045 goto err_unlock_ovs
;
1048 /* Update actions. */
1049 old_acts
= ovsl_dereference(flow
->sf_acts
);
1050 rcu_assign_pointer(flow
->sf_acts
, acts
);
1052 if (unlikely(reply
)) {
1053 error
= ovs_flow_cmd_fill_info(flow
,
1054 ovs_header
->dp_ifindex
,
1055 reply
, info
->snd_portid
,
1063 ovs_nla_free_flow_actions_rcu(old_acts
);
1064 ovs_flow_free(new_flow
, false);
1068 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1075 ovs_nla_free_flow_actions(acts
);
1077 ovs_flow_free(new_flow
, false);
1082 /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */
1083 static struct sw_flow_actions
*get_flow_actions(struct net
*net
,
1084 const struct nlattr
*a
,
1085 const struct sw_flow_key
*key
,
1086 const struct sw_flow_mask
*mask
,
1089 struct sw_flow_actions
*acts
;
1090 struct sw_flow_key masked_key
;
1093 ovs_flow_mask_key(&masked_key
, key
, true, mask
);
1094 error
= ovs_nla_copy_actions(net
, a
, &masked_key
, &acts
, log
);
1097 "Actions may not be safe on all matching packets");
1098 return ERR_PTR(error
);
1104 static int ovs_flow_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1106 struct net
*net
= sock_net(skb
->sk
);
1107 struct nlattr
**a
= info
->attrs
;
1108 struct ovs_header
*ovs_header
= info
->userhdr
;
1109 struct sw_flow_key key
;
1110 struct sw_flow
*flow
;
1111 struct sw_flow_mask mask
;
1112 struct sk_buff
*reply
= NULL
;
1113 struct datapath
*dp
;
1114 struct sw_flow_actions
*old_acts
= NULL
, *acts
= NULL
;
1115 struct sw_flow_match match
;
1116 struct sw_flow_id sfid
;
1117 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1119 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1122 ufid_present
= ovs_nla_get_ufid(&sfid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1123 if (a
[OVS_FLOW_ATTR_KEY
]) {
1124 ovs_match_init(&match
, &key
, &mask
);
1125 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1126 a
[OVS_FLOW_ATTR_MASK
], log
);
1127 } else if (!ufid_present
) {
1129 "Flow set message rejected, Key attribute missing.");
1135 /* Validate actions. */
1136 if (a
[OVS_FLOW_ATTR_ACTIONS
]) {
1137 if (!a
[OVS_FLOW_ATTR_KEY
]) {
1139 "Flow key attribute not present in set flow.");
1144 acts
= get_flow_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
], &key
,
1147 error
= PTR_ERR(acts
);
1151 /* Can allocate before locking if have acts. */
1152 reply
= ovs_flow_cmd_alloc_info(acts
, &sfid
, info
, false,
1154 if (IS_ERR(reply
)) {
1155 error
= PTR_ERR(reply
);
1156 goto err_kfree_acts
;
1161 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1162 if (unlikely(!dp
)) {
1164 goto err_unlock_ovs
;
1166 /* Check that the flow exists. */
1168 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &sfid
);
1170 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1171 if (unlikely(!flow
)) {
1173 goto err_unlock_ovs
;
1176 /* Update actions, if present. */
1178 old_acts
= ovsl_dereference(flow
->sf_acts
);
1179 rcu_assign_pointer(flow
->sf_acts
, acts
);
1181 if (unlikely(reply
)) {
1182 error
= ovs_flow_cmd_fill_info(flow
,
1183 ovs_header
->dp_ifindex
,
1184 reply
, info
->snd_portid
,
1191 /* Could not alloc without acts before locking. */
1192 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
,
1193 info
, OVS_FLOW_CMD_NEW
, false,
1196 if (IS_ERR(reply
)) {
1197 error
= PTR_ERR(reply
);
1198 goto err_unlock_ovs
;
1203 if (a
[OVS_FLOW_ATTR_CLEAR
])
1204 ovs_flow_stats_clear(flow
);
1208 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1210 ovs_nla_free_flow_actions_rcu(old_acts
);
1218 ovs_nla_free_flow_actions(acts
);
1223 static int ovs_flow_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1225 struct nlattr
**a
= info
->attrs
;
1226 struct ovs_header
*ovs_header
= info
->userhdr
;
1227 struct net
*net
= sock_net(skb
->sk
);
1228 struct sw_flow_key key
;
1229 struct sk_buff
*reply
;
1230 struct sw_flow
*flow
;
1231 struct datapath
*dp
;
1232 struct sw_flow_match match
;
1233 struct sw_flow_id ufid
;
1234 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1236 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1239 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1240 if (a
[OVS_FLOW_ATTR_KEY
]) {
1241 ovs_match_init(&match
, &key
, NULL
);
1242 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
], NULL
,
1244 } else if (!ufid_present
) {
1246 "Flow get message rejected, Key attribute missing.");
1253 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1260 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1262 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1268 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
, info
,
1269 OVS_FLOW_CMD_NEW
, true, ufid_flags
);
1270 if (IS_ERR(reply
)) {
1271 err
= PTR_ERR(reply
);
1276 return genlmsg_reply(reply
, info
);
1282 static int ovs_flow_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1284 struct nlattr
**a
= info
->attrs
;
1285 struct ovs_header
*ovs_header
= info
->userhdr
;
1286 struct net
*net
= sock_net(skb
->sk
);
1287 struct sw_flow_key key
;
1288 struct sk_buff
*reply
;
1289 struct sw_flow
*flow
= NULL
;
1290 struct datapath
*dp
;
1291 struct sw_flow_match match
;
1292 struct sw_flow_id ufid
;
1293 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1295 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1298 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1299 if (a
[OVS_FLOW_ATTR_KEY
]) {
1300 ovs_match_init(&match
, &key
, NULL
);
1301 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1308 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1309 if (unlikely(!dp
)) {
1314 if (unlikely(!a
[OVS_FLOW_ATTR_KEY
] && !ufid_present
)) {
1315 err
= ovs_flow_tbl_flush(&dp
->table
);
1320 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1322 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1323 if (unlikely(!flow
)) {
1328 ovs_flow_tbl_remove(&dp
->table
, flow
);
1331 reply
= ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force
*) flow
->sf_acts
,
1332 &flow
->id
, info
, false, ufid_flags
);
1333 if (likely(reply
)) {
1334 if (likely(!IS_ERR(reply
))) {
1335 rcu_read_lock(); /*To keep RCU checker happy. */
1336 err
= ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
,
1337 reply
, info
->snd_portid
,
1344 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1346 netlink_set_err(sock_net(skb
->sk
)->genl_sock
, 0, 0, PTR_ERR(reply
));
1350 ovs_flow_free(flow
, true);
1357 static int ovs_flow_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1359 struct nlattr
*a
[__OVS_FLOW_ATTR_MAX
];
1360 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1361 struct table_instance
*ti
;
1362 struct datapath
*dp
;
1366 err
= genlmsg_parse(cb
->nlh
, &dp_flow_genl_family
, a
,
1367 OVS_FLOW_ATTR_MAX
, flow_policy
);
1370 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1373 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1379 ti
= rcu_dereference(dp
->table
.ti
);
1381 struct sw_flow
*flow
;
1384 bucket
= cb
->args
[0];
1386 flow
= ovs_flow_tbl_dump_next(ti
, &bucket
, &obj
);
1390 if (ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
, skb
,
1391 NETLINK_CB(cb
->skb
).portid
,
1392 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1393 OVS_FLOW_CMD_NEW
, ufid_flags
) < 0)
1396 cb
->args
[0] = bucket
;
1403 static const struct nla_policy flow_policy
[OVS_FLOW_ATTR_MAX
+ 1] = {
1404 [OVS_FLOW_ATTR_KEY
] = { .type
= NLA_NESTED
},
1405 [OVS_FLOW_ATTR_MASK
] = { .type
= NLA_NESTED
},
1406 [OVS_FLOW_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
1407 [OVS_FLOW_ATTR_CLEAR
] = { .type
= NLA_FLAG
},
1408 [OVS_FLOW_ATTR_PROBE
] = { .type
= NLA_FLAG
},
1409 [OVS_FLOW_ATTR_UFID
] = { .type
= NLA_UNSPEC
, .len
= 1 },
1410 [OVS_FLOW_ATTR_UFID_FLAGS
] = { .type
= NLA_U32
},
1413 static const struct genl_ops dp_flow_genl_ops
[] = {
1414 { .cmd
= OVS_FLOW_CMD_NEW
,
1415 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1416 .policy
= flow_policy
,
1417 .doit
= ovs_flow_cmd_new
1419 { .cmd
= OVS_FLOW_CMD_DEL
,
1420 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1421 .policy
= flow_policy
,
1422 .doit
= ovs_flow_cmd_del
1424 { .cmd
= OVS_FLOW_CMD_GET
,
1425 .flags
= 0, /* OK for unprivileged users. */
1426 .policy
= flow_policy
,
1427 .doit
= ovs_flow_cmd_get
,
1428 .dumpit
= ovs_flow_cmd_dump
1430 { .cmd
= OVS_FLOW_CMD_SET
,
1431 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1432 .policy
= flow_policy
,
1433 .doit
= ovs_flow_cmd_set
,
1437 static struct genl_family dp_flow_genl_family
= {
1438 .id
= GENL_ID_GENERATE
,
1439 .hdrsize
= sizeof(struct ovs_header
),
1440 .name
= OVS_FLOW_FAMILY
,
1441 .version
= OVS_FLOW_VERSION
,
1442 .maxattr
= OVS_FLOW_ATTR_MAX
,
1444 .parallel_ops
= true,
1445 .ops
= dp_flow_genl_ops
,
1446 .n_ops
= ARRAY_SIZE(dp_flow_genl_ops
),
1447 .mcgrps
= &ovs_dp_flow_multicast_group
,
1451 static size_t ovs_dp_cmd_msg_size(void)
1453 size_t msgsize
= NLMSG_ALIGN(sizeof(struct ovs_header
));
1455 msgsize
+= nla_total_size(IFNAMSIZ
);
1456 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_stats
));
1457 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats
));
1458 msgsize
+= nla_total_size(sizeof(u32
)); /* OVS_DP_ATTR_USER_FEATURES */
1463 /* Called with ovs_mutex. */
1464 static int ovs_dp_cmd_fill_info(struct datapath
*dp
, struct sk_buff
*skb
,
1465 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1467 struct ovs_header
*ovs_header
;
1468 struct ovs_dp_stats dp_stats
;
1469 struct ovs_dp_megaflow_stats dp_megaflow_stats
;
1472 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_datapath_genl_family
,
1477 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
1479 err
= nla_put_string(skb
, OVS_DP_ATTR_NAME
, ovs_dp_name(dp
));
1481 goto nla_put_failure
;
1483 get_dp_stats(dp
, &dp_stats
, &dp_megaflow_stats
);
1484 if (nla_put_64bit(skb
, OVS_DP_ATTR_STATS
, sizeof(struct ovs_dp_stats
),
1485 &dp_stats
, OVS_DP_ATTR_PAD
))
1486 goto nla_put_failure
;
1488 if (nla_put_64bit(skb
, OVS_DP_ATTR_MEGAFLOW_STATS
,
1489 sizeof(struct ovs_dp_megaflow_stats
),
1490 &dp_megaflow_stats
, OVS_DP_ATTR_PAD
))
1491 goto nla_put_failure
;
1493 if (nla_put_u32(skb
, OVS_DP_ATTR_USER_FEATURES
, dp
->user_features
))
1494 goto nla_put_failure
;
1496 genlmsg_end(skb
, ovs_header
);
1500 genlmsg_cancel(skb
, ovs_header
);
1505 static struct sk_buff
*ovs_dp_cmd_alloc_info(void)
1507 return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL
);
1510 /* Called with rcu_read_lock or ovs_mutex. */
1511 static struct datapath
*lookup_datapath(struct net
*net
,
1512 const struct ovs_header
*ovs_header
,
1513 struct nlattr
*a
[OVS_DP_ATTR_MAX
+ 1])
1515 struct datapath
*dp
;
1517 if (!a
[OVS_DP_ATTR_NAME
])
1518 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1520 struct vport
*vport
;
1522 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_DP_ATTR_NAME
]));
1523 dp
= vport
&& vport
->port_no
== OVSP_LOCAL
? vport
->dp
: NULL
;
1525 return dp
? dp
: ERR_PTR(-ENODEV
);
1528 static void ovs_dp_reset_user_features(struct sk_buff
*skb
, struct genl_info
*info
)
1530 struct datapath
*dp
;
1532 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1536 WARN(dp
->user_features
, "Dropping previously announced user features\n");
1537 dp
->user_features
= 0;
1540 static void ovs_dp_change(struct datapath
*dp
, struct nlattr
*a
[])
1542 if (a
[OVS_DP_ATTR_USER_FEATURES
])
1543 dp
->user_features
= nla_get_u32(a
[OVS_DP_ATTR_USER_FEATURES
]);
1546 static int ovs_dp_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1548 struct nlattr
**a
= info
->attrs
;
1549 struct vport_parms parms
;
1550 struct sk_buff
*reply
;
1551 struct datapath
*dp
;
1552 struct vport
*vport
;
1553 struct ovs_net
*ovs_net
;
1557 if (!a
[OVS_DP_ATTR_NAME
] || !a
[OVS_DP_ATTR_UPCALL_PID
])
1560 reply
= ovs_dp_cmd_alloc_info();
1565 dp
= kzalloc(sizeof(*dp
), GFP_KERNEL
);
1567 goto err_free_reply
;
1569 ovs_dp_set_net(dp
, sock_net(skb
->sk
));
1571 /* Allocate table. */
1572 err
= ovs_flow_tbl_init(&dp
->table
);
1576 dp
->stats_percpu
= netdev_alloc_pcpu_stats(struct dp_stats_percpu
);
1577 if (!dp
->stats_percpu
) {
1579 goto err_destroy_table
;
1582 dp
->ports
= kmalloc(DP_VPORT_HASH_BUCKETS
* sizeof(struct hlist_head
),
1586 goto err_destroy_percpu
;
1589 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1590 INIT_HLIST_HEAD(&dp
->ports
[i
]);
1592 /* Set up our datapath device. */
1593 parms
.name
= nla_data(a
[OVS_DP_ATTR_NAME
]);
1594 parms
.type
= OVS_VPORT_TYPE_INTERNAL
;
1595 parms
.options
= NULL
;
1597 parms
.port_no
= OVSP_LOCAL
;
1598 parms
.upcall_portids
= a
[OVS_DP_ATTR_UPCALL_PID
];
1600 ovs_dp_change(dp
, a
);
1602 /* So far only local changes have been made, now need the lock. */
1605 vport
= new_vport(&parms
);
1606 if (IS_ERR(vport
)) {
1607 err
= PTR_ERR(vport
);
1611 if (err
== -EEXIST
) {
1612 /* An outdated user space instance that does not understand
1613 * the concept of user_features has attempted to create a new
1614 * datapath and is likely to reuse it. Drop all user features.
1616 if (info
->genlhdr
->version
< OVS_DP_VER_FEATURES
)
1617 ovs_dp_reset_user_features(skb
, info
);
1620 goto err_destroy_ports_array
;
1623 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1624 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1627 ovs_net
= net_generic(ovs_dp_get_net(dp
), ovs_net_id
);
1628 list_add_tail_rcu(&dp
->list_node
, &ovs_net
->dps
);
1632 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1635 err_destroy_ports_array
:
1639 free_percpu(dp
->stats_percpu
);
1641 ovs_flow_tbl_destroy(&dp
->table
);
1650 /* Called with ovs_mutex. */
1651 static void __dp_destroy(struct datapath
*dp
)
1655 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1656 struct vport
*vport
;
1657 struct hlist_node
*n
;
1659 hlist_for_each_entry_safe(vport
, n
, &dp
->ports
[i
], dp_hash_node
)
1660 if (vport
->port_no
!= OVSP_LOCAL
)
1661 ovs_dp_detach_port(vport
);
1664 list_del_rcu(&dp
->list_node
);
1666 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1667 * all ports in datapath are destroyed first before freeing datapath.
1669 ovs_dp_detach_port(ovs_vport_ovsl(dp
, OVSP_LOCAL
));
1671 /* RCU destroy the flow table */
1672 call_rcu(&dp
->rcu
, destroy_dp_rcu
);
1675 static int ovs_dp_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1677 struct sk_buff
*reply
;
1678 struct datapath
*dp
;
1681 reply
= ovs_dp_cmd_alloc_info();
1686 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1689 goto err_unlock_free
;
1691 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1692 info
->snd_seq
, 0, OVS_DP_CMD_DEL
);
1698 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1708 static int ovs_dp_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1710 struct sk_buff
*reply
;
1711 struct datapath
*dp
;
1714 reply
= ovs_dp_cmd_alloc_info();
1719 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1722 goto err_unlock_free
;
1724 ovs_dp_change(dp
, info
->attrs
);
1726 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1727 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1731 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1741 static int ovs_dp_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1743 struct sk_buff
*reply
;
1744 struct datapath
*dp
;
1747 reply
= ovs_dp_cmd_alloc_info();
1752 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1755 goto err_unlock_free
;
1757 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1758 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1762 return genlmsg_reply(reply
, info
);
1770 static int ovs_dp_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1772 struct ovs_net
*ovs_net
= net_generic(sock_net(skb
->sk
), ovs_net_id
);
1773 struct datapath
*dp
;
1774 int skip
= cb
->args
[0];
1778 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
1780 ovs_dp_cmd_fill_info(dp
, skb
, NETLINK_CB(cb
->skb
).portid
,
1781 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1782 OVS_DP_CMD_NEW
) < 0)
1793 static const struct nla_policy datapath_policy
[OVS_DP_ATTR_MAX
+ 1] = {
1794 [OVS_DP_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1795 [OVS_DP_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1796 [OVS_DP_ATTR_USER_FEATURES
] = { .type
= NLA_U32
},
1799 static const struct genl_ops dp_datapath_genl_ops
[] = {
1800 { .cmd
= OVS_DP_CMD_NEW
,
1801 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1802 .policy
= datapath_policy
,
1803 .doit
= ovs_dp_cmd_new
1805 { .cmd
= OVS_DP_CMD_DEL
,
1806 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1807 .policy
= datapath_policy
,
1808 .doit
= ovs_dp_cmd_del
1810 { .cmd
= OVS_DP_CMD_GET
,
1811 .flags
= 0, /* OK for unprivileged users. */
1812 .policy
= datapath_policy
,
1813 .doit
= ovs_dp_cmd_get
,
1814 .dumpit
= ovs_dp_cmd_dump
1816 { .cmd
= OVS_DP_CMD_SET
,
1817 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1818 .policy
= datapath_policy
,
1819 .doit
= ovs_dp_cmd_set
,
1823 static struct genl_family dp_datapath_genl_family
= {
1824 .id
= GENL_ID_GENERATE
,
1825 .hdrsize
= sizeof(struct ovs_header
),
1826 .name
= OVS_DATAPATH_FAMILY
,
1827 .version
= OVS_DATAPATH_VERSION
,
1828 .maxattr
= OVS_DP_ATTR_MAX
,
1830 .parallel_ops
= true,
1831 .ops
= dp_datapath_genl_ops
,
1832 .n_ops
= ARRAY_SIZE(dp_datapath_genl_ops
),
1833 .mcgrps
= &ovs_dp_datapath_multicast_group
,
1837 /* Called with ovs_mutex or RCU read lock. */
1838 static int ovs_vport_cmd_fill_info(struct vport
*vport
, struct sk_buff
*skb
,
1839 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1841 struct ovs_header
*ovs_header
;
1842 struct ovs_vport_stats vport_stats
;
1845 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_vport_genl_family
,
1850 ovs_header
->dp_ifindex
= get_dpifindex(vport
->dp
);
1852 if (nla_put_u32(skb
, OVS_VPORT_ATTR_PORT_NO
, vport
->port_no
) ||
1853 nla_put_u32(skb
, OVS_VPORT_ATTR_TYPE
, vport
->ops
->type
) ||
1854 nla_put_string(skb
, OVS_VPORT_ATTR_NAME
,
1855 ovs_vport_name(vport
)))
1856 goto nla_put_failure
;
1858 ovs_vport_get_stats(vport
, &vport_stats
);
1859 if (nla_put_64bit(skb
, OVS_VPORT_ATTR_STATS
,
1860 sizeof(struct ovs_vport_stats
), &vport_stats
,
1861 OVS_VPORT_ATTR_PAD
))
1862 goto nla_put_failure
;
1864 if (ovs_vport_get_upcall_portids(vport
, skb
))
1865 goto nla_put_failure
;
1867 err
= ovs_vport_get_options(vport
, skb
);
1868 if (err
== -EMSGSIZE
)
1871 genlmsg_end(skb
, ovs_header
);
1877 genlmsg_cancel(skb
, ovs_header
);
1881 static struct sk_buff
*ovs_vport_cmd_alloc_info(void)
1883 return nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1886 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1887 struct sk_buff
*ovs_vport_cmd_build_info(struct vport
*vport
, u32 portid
,
1890 struct sk_buff
*skb
;
1893 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
1895 return ERR_PTR(-ENOMEM
);
1897 retval
= ovs_vport_cmd_fill_info(vport
, skb
, portid
, seq
, 0, cmd
);
1903 /* Called with ovs_mutex or RCU read lock. */
1904 static struct vport
*lookup_vport(struct net
*net
,
1905 const struct ovs_header
*ovs_header
,
1906 struct nlattr
*a
[OVS_VPORT_ATTR_MAX
+ 1])
1908 struct datapath
*dp
;
1909 struct vport
*vport
;
1911 if (a
[OVS_VPORT_ATTR_NAME
]) {
1912 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_VPORT_ATTR_NAME
]));
1914 return ERR_PTR(-ENODEV
);
1915 if (ovs_header
->dp_ifindex
&&
1916 ovs_header
->dp_ifindex
!= get_dpifindex(vport
->dp
))
1917 return ERR_PTR(-ENODEV
);
1919 } else if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
1920 u32 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1922 if (port_no
>= DP_MAX_PORTS
)
1923 return ERR_PTR(-EFBIG
);
1925 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1927 return ERR_PTR(-ENODEV
);
1929 vport
= ovs_vport_ovsl_rcu(dp
, port_no
);
1931 return ERR_PTR(-ENODEV
);
1934 return ERR_PTR(-EINVAL
);
1937 /* Called with ovs_mutex */
1938 static void update_headroom(struct datapath
*dp
)
1940 unsigned dev_headroom
, max_headroom
= 0;
1941 struct net_device
*dev
;
1942 struct vport
*vport
;
1945 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1946 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
1948 dev_headroom
= netdev_get_fwd_headroom(dev
);
1949 if (dev_headroom
> max_headroom
)
1950 max_headroom
= dev_headroom
;
1954 dp
->max_headroom
= max_headroom
;
1955 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1956 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
)
1957 netdev_set_rx_headroom(vport
->dev
, max_headroom
);
1960 static int ovs_vport_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1962 struct nlattr
**a
= info
->attrs
;
1963 struct ovs_header
*ovs_header
= info
->userhdr
;
1964 struct vport_parms parms
;
1965 struct sk_buff
*reply
;
1966 struct vport
*vport
;
1967 struct datapath
*dp
;
1971 if (!a
[OVS_VPORT_ATTR_NAME
] || !a
[OVS_VPORT_ATTR_TYPE
] ||
1972 !a
[OVS_VPORT_ATTR_UPCALL_PID
])
1975 port_no
= a
[OVS_VPORT_ATTR_PORT_NO
]
1976 ? nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]) : 0;
1977 if (port_no
>= DP_MAX_PORTS
)
1980 reply
= ovs_vport_cmd_alloc_info();
1986 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1989 goto exit_unlock_free
;
1992 vport
= ovs_vport_ovsl(dp
, port_no
);
1995 goto exit_unlock_free
;
1997 for (port_no
= 1; ; port_no
++) {
1998 if (port_no
>= DP_MAX_PORTS
) {
2000 goto exit_unlock_free
;
2002 vport
= ovs_vport_ovsl(dp
, port_no
);
2008 parms
.name
= nla_data(a
[OVS_VPORT_ATTR_NAME
]);
2009 parms
.type
= nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]);
2010 parms
.options
= a
[OVS_VPORT_ATTR_OPTIONS
];
2012 parms
.port_no
= port_no
;
2013 parms
.upcall_portids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2015 vport
= new_vport(&parms
);
2016 err
= PTR_ERR(vport
);
2017 if (IS_ERR(vport
)) {
2020 goto exit_unlock_free
;
2023 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2024 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2026 if (netdev_get_fwd_headroom(vport
->dev
) > dp
->max_headroom
)
2027 update_headroom(dp
);
2029 netdev_set_rx_headroom(vport
->dev
, dp
->max_headroom
);
2034 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2043 static int ovs_vport_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
2045 struct nlattr
**a
= info
->attrs
;
2046 struct sk_buff
*reply
;
2047 struct vport
*vport
;
2050 reply
= ovs_vport_cmd_alloc_info();
2055 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2056 err
= PTR_ERR(vport
);
2058 goto exit_unlock_free
;
2060 if (a
[OVS_VPORT_ATTR_TYPE
] &&
2061 nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]) != vport
->ops
->type
) {
2063 goto exit_unlock_free
;
2066 if (a
[OVS_VPORT_ATTR_OPTIONS
]) {
2067 err
= ovs_vport_set_options(vport
, a
[OVS_VPORT_ATTR_OPTIONS
]);
2069 goto exit_unlock_free
;
2073 if (a
[OVS_VPORT_ATTR_UPCALL_PID
]) {
2074 struct nlattr
*ids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2076 err
= ovs_vport_set_upcall_portids(vport
, ids
);
2078 goto exit_unlock_free
;
2081 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2082 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2086 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2095 static int ovs_vport_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
2097 bool must_update_headroom
= false;
2098 struct nlattr
**a
= info
->attrs
;
2099 struct sk_buff
*reply
;
2100 struct datapath
*dp
;
2101 struct vport
*vport
;
2104 reply
= ovs_vport_cmd_alloc_info();
2109 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2110 err
= PTR_ERR(vport
);
2112 goto exit_unlock_free
;
2114 if (vport
->port_no
== OVSP_LOCAL
) {
2116 goto exit_unlock_free
;
2119 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2120 info
->snd_seq
, 0, OVS_VPORT_CMD_DEL
);
2123 /* the vport deletion may trigger dp headroom update */
2125 if (netdev_get_fwd_headroom(vport
->dev
) == dp
->max_headroom
)
2126 must_update_headroom
= true;
2127 netdev_reset_rx_headroom(vport
->dev
);
2128 ovs_dp_detach_port(vport
);
2130 if (must_update_headroom
)
2131 update_headroom(dp
);
2134 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2143 static int ovs_vport_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
2145 struct nlattr
**a
= info
->attrs
;
2146 struct ovs_header
*ovs_header
= info
->userhdr
;
2147 struct sk_buff
*reply
;
2148 struct vport
*vport
;
2151 reply
= ovs_vport_cmd_alloc_info();
2156 vport
= lookup_vport(sock_net(skb
->sk
), ovs_header
, a
);
2157 err
= PTR_ERR(vport
);
2159 goto exit_unlock_free
;
2160 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2161 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2165 return genlmsg_reply(reply
, info
);
2173 static int ovs_vport_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2175 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
2176 struct datapath
*dp
;
2177 int bucket
= cb
->args
[0], skip
= cb
->args
[1];
2181 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2186 for (i
= bucket
; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2187 struct vport
*vport
;
2190 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
2192 ovs_vport_cmd_fill_info(vport
, skb
,
2193 NETLINK_CB(cb
->skb
).portid
,
2196 OVS_VPORT_CMD_NEW
) < 0)
2212 static const struct nla_policy vport_policy
[OVS_VPORT_ATTR_MAX
+ 1] = {
2213 [OVS_VPORT_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
2214 [OVS_VPORT_ATTR_STATS
] = { .len
= sizeof(struct ovs_vport_stats
) },
2215 [OVS_VPORT_ATTR_PORT_NO
] = { .type
= NLA_U32
},
2216 [OVS_VPORT_ATTR_TYPE
] = { .type
= NLA_U32
},
2217 [OVS_VPORT_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
2218 [OVS_VPORT_ATTR_OPTIONS
] = { .type
= NLA_NESTED
},
2221 static const struct genl_ops dp_vport_genl_ops
[] = {
2222 { .cmd
= OVS_VPORT_CMD_NEW
,
2223 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2224 .policy
= vport_policy
,
2225 .doit
= ovs_vport_cmd_new
2227 { .cmd
= OVS_VPORT_CMD_DEL
,
2228 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2229 .policy
= vport_policy
,
2230 .doit
= ovs_vport_cmd_del
2232 { .cmd
= OVS_VPORT_CMD_GET
,
2233 .flags
= 0, /* OK for unprivileged users. */
2234 .policy
= vport_policy
,
2235 .doit
= ovs_vport_cmd_get
,
2236 .dumpit
= ovs_vport_cmd_dump
2238 { .cmd
= OVS_VPORT_CMD_SET
,
2239 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2240 .policy
= vport_policy
,
2241 .doit
= ovs_vport_cmd_set
,
2245 struct genl_family dp_vport_genl_family
= {
2246 .id
= GENL_ID_GENERATE
,
2247 .hdrsize
= sizeof(struct ovs_header
),
2248 .name
= OVS_VPORT_FAMILY
,
2249 .version
= OVS_VPORT_VERSION
,
2250 .maxattr
= OVS_VPORT_ATTR_MAX
,
2252 .parallel_ops
= true,
2253 .ops
= dp_vport_genl_ops
,
2254 .n_ops
= ARRAY_SIZE(dp_vport_genl_ops
),
2255 .mcgrps
= &ovs_dp_vport_multicast_group
,
2259 static struct genl_family
* const dp_genl_families
[] = {
2260 &dp_datapath_genl_family
,
2261 &dp_vport_genl_family
,
2262 &dp_flow_genl_family
,
2263 &dp_packet_genl_family
,
2266 static void dp_unregister_genl(int n_families
)
2270 for (i
= 0; i
< n_families
; i
++)
2271 genl_unregister_family(dp_genl_families
[i
]);
2274 static int dp_register_genl(void)
2279 for (i
= 0; i
< ARRAY_SIZE(dp_genl_families
); i
++) {
2281 err
= genl_register_family(dp_genl_families
[i
]);
2289 dp_unregister_genl(i
);
2293 static int __net_init
ovs_init_net(struct net
*net
)
2295 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2297 INIT_LIST_HEAD(&ovs_net
->dps
);
2298 INIT_WORK(&ovs_net
->dp_notify_work
, ovs_dp_notify_wq
);
2303 static void __net_exit
list_vports_from_net(struct net
*net
, struct net
*dnet
,
2304 struct list_head
*head
)
2306 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2307 struct datapath
*dp
;
2309 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
2312 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2313 struct vport
*vport
;
2315 hlist_for_each_entry(vport
, &dp
->ports
[i
], dp_hash_node
) {
2316 if (vport
->ops
->type
!= OVS_VPORT_TYPE_INTERNAL
)
2319 if (dev_net(vport
->dev
) == dnet
)
2320 list_add(&vport
->detach_list
, head
);
2326 static void __net_exit
ovs_exit_net(struct net
*dnet
)
2328 struct datapath
*dp
, *dp_next
;
2329 struct ovs_net
*ovs_net
= net_generic(dnet
, ovs_net_id
);
2330 struct vport
*vport
, *vport_next
;
2336 list_for_each_entry_safe(dp
, dp_next
, &ovs_net
->dps
, list_node
)
2341 list_vports_from_net(net
, dnet
, &head
);
2344 /* Detach all vports from given namespace. */
2345 list_for_each_entry_safe(vport
, vport_next
, &head
, detach_list
) {
2346 list_del(&vport
->detach_list
);
2347 ovs_dp_detach_port(vport
);
2352 cancel_work_sync(&ovs_net
->dp_notify_work
);
2355 static struct pernet_operations ovs_net_ops
= {
2356 .init
= ovs_init_net
,
2357 .exit
= ovs_exit_net
,
2359 .size
= sizeof(struct ovs_net
),
2362 static int __init
dp_init(void)
2366 BUILD_BUG_ON(sizeof(struct ovs_skb_cb
) > FIELD_SIZEOF(struct sk_buff
, cb
));
2368 pr_info("Open vSwitch switching datapath\n");
2370 err
= action_fifos_init();
2374 err
= ovs_internal_dev_rtnl_link_register();
2376 goto error_action_fifos_exit
;
2378 err
= ovs_flow_init();
2380 goto error_unreg_rtnl_link
;
2382 err
= ovs_vport_init();
2384 goto error_flow_exit
;
2386 err
= register_pernet_device(&ovs_net_ops
);
2388 goto error_vport_exit
;
2390 err
= register_netdevice_notifier(&ovs_dp_device_notifier
);
2392 goto error_netns_exit
;
2394 err
= ovs_netdev_init();
2396 goto error_unreg_notifier
;
2398 err
= dp_register_genl();
2400 goto error_unreg_netdev
;
2406 error_unreg_notifier
:
2407 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2409 unregister_pernet_device(&ovs_net_ops
);
2414 error_unreg_rtnl_link
:
2415 ovs_internal_dev_rtnl_link_unregister();
2416 error_action_fifos_exit
:
2417 action_fifos_exit();
2422 static void dp_cleanup(void)
2424 dp_unregister_genl(ARRAY_SIZE(dp_genl_families
));
2426 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2427 unregister_pernet_device(&ovs_net_ops
);
2431 ovs_internal_dev_rtnl_link_unregister();
2432 action_fifos_exit();
2435 module_init(dp_init
);
2436 module_exit(dp_cleanup
);
2438 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2439 MODULE_LICENSE("GPL");