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 unsigned int ovs_net_id __read_mostly
;
63 static struct genl_family dp_packet_genl_family
;
64 static struct genl_family dp_flow_genl_family
;
65 static struct genl_family dp_datapath_genl_family
;
67 static const struct nla_policy flow_policy
[];
69 static const struct genl_multicast_group ovs_dp_flow_multicast_group
= {
70 .name
= OVS_FLOW_MCGROUP
,
73 static const struct genl_multicast_group ovs_dp_datapath_multicast_group
= {
74 .name
= OVS_DATAPATH_MCGROUP
,
77 static const struct genl_multicast_group ovs_dp_vport_multicast_group
= {
78 .name
= OVS_VPORT_MCGROUP
,
81 /* Check if need to build a reply message.
82 * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */
83 static bool ovs_must_notify(struct genl_family
*family
, struct genl_info
*info
,
86 return info
->nlhdr
->nlmsg_flags
& NLM_F_ECHO
||
87 genl_has_listeners(family
, genl_info_net(info
), group
);
90 static void ovs_notify(struct genl_family
*family
,
91 struct sk_buff
*skb
, struct genl_info
*info
)
93 genl_notify(family
, skb
, info
, 0, GFP_KERNEL
);
99 * All writes e.g. Writes to device state (add/remove datapath, port, set
100 * operations on vports, etc.), Writes to other state (flow table
101 * modifications, set miscellaneous datapath parameters, etc.) are protected
104 * Reads are protected by RCU.
106 * There are a few special cases (mostly stats) that have their own
107 * synchronization but they nest under all of above and don't interact with
110 * The RTNL lock nests inside ovs_mutex.
113 static DEFINE_MUTEX(ovs_mutex
);
117 mutex_lock(&ovs_mutex
);
120 void ovs_unlock(void)
122 mutex_unlock(&ovs_mutex
);
125 #ifdef CONFIG_LOCKDEP
126 int lockdep_ovsl_is_held(void)
129 return lockdep_is_held(&ovs_mutex
);
135 static struct vport
*new_vport(const struct vport_parms
*);
136 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*,
137 const struct sw_flow_key
*,
138 const struct dp_upcall_info
*,
140 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*,
141 const struct sw_flow_key
*,
142 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
, 0);
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
,
306 struct dp_stats_percpu
*stats
;
309 if (upcall_info
->portid
== 0) {
314 if (!skb_is_gso(skb
))
315 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
317 err
= queue_gso_packets(dp
, skb
, key
, upcall_info
, cutlen
);
324 stats
= this_cpu_ptr(dp
->stats_percpu
);
326 u64_stats_update_begin(&stats
->syncp
);
328 u64_stats_update_end(&stats
->syncp
);
333 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*skb
,
334 const struct sw_flow_key
*key
,
335 const struct dp_upcall_info
*upcall_info
,
338 unsigned short gso_type
= skb_shinfo(skb
)->gso_type
;
339 struct sw_flow_key later_key
;
340 struct sk_buff
*segs
, *nskb
;
343 BUILD_BUG_ON(sizeof(*OVS_CB(skb
)) > SKB_SGO_CB_OFFSET
);
344 segs
= __skb_gso_segment(skb
, NETIF_F_SG
, false);
346 return PTR_ERR(segs
);
350 if (gso_type
& SKB_GSO_UDP
) {
351 /* The initial flow key extracted by ovs_flow_key_extract()
352 * in this case is for a first fragment, so we need to
353 * properly mark later fragments.
356 later_key
.ip
.frag
= OVS_FRAG_TYPE_LATER
;
359 /* Queue all of the segments. */
362 if (gso_type
& SKB_GSO_UDP
&& skb
!= segs
)
365 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
369 } while ((skb
= skb
->next
));
371 /* Free all of the segments. */
379 } while ((skb
= nskb
));
383 static size_t upcall_msg_size(const struct dp_upcall_info
*upcall_info
,
386 size_t size
= NLMSG_ALIGN(sizeof(struct ovs_header
))
387 + nla_total_size(hdrlen
) /* OVS_PACKET_ATTR_PACKET */
388 + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */
389 + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */
391 /* OVS_PACKET_ATTR_USERDATA */
392 if (upcall_info
->userdata
)
393 size
+= NLA_ALIGN(upcall_info
->userdata
->nla_len
);
395 /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */
396 if (upcall_info
->egress_tun_info
)
397 size
+= nla_total_size(ovs_tun_key_attr_size());
399 /* OVS_PACKET_ATTR_ACTIONS */
400 if (upcall_info
->actions_len
)
401 size
+= nla_total_size(upcall_info
->actions_len
);
403 /* OVS_PACKET_ATTR_MRU */
404 if (upcall_info
->mru
)
405 size
+= nla_total_size(sizeof(upcall_info
->mru
));
410 static void pad_packet(struct datapath
*dp
, struct sk_buff
*skb
)
412 if (!(dp
->user_features
& OVS_DP_F_UNALIGNED
)) {
413 size_t plen
= NLA_ALIGN(skb
->len
) - skb
->len
;
416 memset(skb_put(skb
, plen
), 0, plen
);
420 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*skb
,
421 const struct sw_flow_key
*key
,
422 const struct dp_upcall_info
*upcall_info
,
425 struct ovs_header
*upcall
;
426 struct sk_buff
*nskb
= NULL
;
427 struct sk_buff
*user_skb
= NULL
; /* to be queued to userspace */
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
- cutlen
);
469 user_skb
= genlmsg_new(len
, 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 /* Add OVS_PACKET_ATTR_LEN when packet is truncated */
518 if (nla_put_u32(user_skb
, OVS_PACKET_ATTR_LEN
,
523 pad_packet(dp
, user_skb
);
526 /* Only reserve room for attribute header, packet data is added
527 * in skb_zerocopy() */
528 if (!(nla
= nla_reserve(user_skb
, OVS_PACKET_ATTR_PACKET
, 0))) {
532 nla
->nla_len
= nla_attr_size(skb
->len
- cutlen
);
534 err
= skb_zerocopy(user_skb
, skb
, skb
->len
- cutlen
, hlen
);
538 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
539 pad_packet(dp
, user_skb
);
541 ((struct nlmsghdr
*) user_skb
->data
)->nlmsg_len
= user_skb
->len
;
543 err
= genlmsg_unicast(ovs_dp_get_net(dp
), user_skb
, upcall_info
->portid
);
553 static int ovs_packet_cmd_execute(struct sk_buff
*skb
, struct genl_info
*info
)
555 struct ovs_header
*ovs_header
= info
->userhdr
;
556 struct net
*net
= sock_net(skb
->sk
);
557 struct nlattr
**a
= info
->attrs
;
558 struct sw_flow_actions
*acts
;
559 struct sk_buff
*packet
;
560 struct sw_flow
*flow
;
561 struct sw_flow_actions
*sf_acts
;
563 struct vport
*input_vport
;
567 bool log
= !a
[OVS_PACKET_ATTR_PROBE
];
570 if (!a
[OVS_PACKET_ATTR_PACKET
] || !a
[OVS_PACKET_ATTR_KEY
] ||
571 !a
[OVS_PACKET_ATTR_ACTIONS
])
574 len
= nla_len(a
[OVS_PACKET_ATTR_PACKET
]);
575 packet
= __dev_alloc_skb(NET_IP_ALIGN
+ len
, GFP_KERNEL
);
579 skb_reserve(packet
, NET_IP_ALIGN
);
581 nla_memcpy(__skb_put(packet
, len
), a
[OVS_PACKET_ATTR_PACKET
], len
);
583 /* Set packet's mru */
584 if (a
[OVS_PACKET_ATTR_MRU
]) {
585 mru
= nla_get_u16(a
[OVS_PACKET_ATTR_MRU
]);
586 packet
->ignore_df
= 1;
588 OVS_CB(packet
)->mru
= mru
;
590 /* Build an sw_flow for sending this packet. */
591 flow
= ovs_flow_alloc();
596 err
= ovs_flow_key_extract_userspace(net
, a
[OVS_PACKET_ATTR_KEY
],
597 packet
, &flow
->key
, log
);
601 err
= ovs_nla_copy_actions(net
, a
[OVS_PACKET_ATTR_ACTIONS
],
602 &flow
->key
, &acts
, log
);
606 rcu_assign_pointer(flow
->sf_acts
, acts
);
607 packet
->priority
= flow
->key
.phy
.priority
;
608 packet
->mark
= flow
->key
.phy
.skb_mark
;
611 dp
= get_dp_rcu(net
, ovs_header
->dp_ifindex
);
616 input_vport
= ovs_vport_rcu(dp
, flow
->key
.phy
.in_port
);
618 input_vport
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
623 packet
->dev
= input_vport
->dev
;
624 OVS_CB(packet
)->input_vport
= input_vport
;
625 sf_acts
= rcu_dereference(flow
->sf_acts
);
628 err
= ovs_execute_actions(dp
, packet
, sf_acts
, &flow
->key
);
632 ovs_flow_free(flow
, false);
638 ovs_flow_free(flow
, false);
645 static const struct nla_policy packet_policy
[OVS_PACKET_ATTR_MAX
+ 1] = {
646 [OVS_PACKET_ATTR_PACKET
] = { .len
= ETH_HLEN
},
647 [OVS_PACKET_ATTR_KEY
] = { .type
= NLA_NESTED
},
648 [OVS_PACKET_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
649 [OVS_PACKET_ATTR_PROBE
] = { .type
= NLA_FLAG
},
650 [OVS_PACKET_ATTR_MRU
] = { .type
= NLA_U16
},
653 static const struct genl_ops dp_packet_genl_ops
[] = {
654 { .cmd
= OVS_PACKET_CMD_EXECUTE
,
655 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
656 .policy
= packet_policy
,
657 .doit
= ovs_packet_cmd_execute
661 static struct genl_family dp_packet_genl_family __ro_after_init
= {
662 .hdrsize
= sizeof(struct ovs_header
),
663 .name
= OVS_PACKET_FAMILY
,
664 .version
= OVS_PACKET_VERSION
,
665 .maxattr
= OVS_PACKET_ATTR_MAX
,
667 .parallel_ops
= true,
668 .ops
= dp_packet_genl_ops
,
669 .n_ops
= ARRAY_SIZE(dp_packet_genl_ops
),
670 .module
= THIS_MODULE
,
673 static void get_dp_stats(const struct datapath
*dp
, struct ovs_dp_stats
*stats
,
674 struct ovs_dp_megaflow_stats
*mega_stats
)
678 memset(mega_stats
, 0, sizeof(*mega_stats
));
680 stats
->n_flows
= ovs_flow_tbl_count(&dp
->table
);
681 mega_stats
->n_masks
= ovs_flow_tbl_num_masks(&dp
->table
);
683 stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
685 for_each_possible_cpu(i
) {
686 const struct dp_stats_percpu
*percpu_stats
;
687 struct dp_stats_percpu local_stats
;
690 percpu_stats
= per_cpu_ptr(dp
->stats_percpu
, i
);
693 start
= u64_stats_fetch_begin_irq(&percpu_stats
->syncp
);
694 local_stats
= *percpu_stats
;
695 } while (u64_stats_fetch_retry_irq(&percpu_stats
->syncp
, start
));
697 stats
->n_hit
+= local_stats
.n_hit
;
698 stats
->n_missed
+= local_stats
.n_missed
;
699 stats
->n_lost
+= local_stats
.n_lost
;
700 mega_stats
->n_mask_hit
+= local_stats
.n_mask_hit
;
704 static bool should_fill_key(const struct sw_flow_id
*sfid
, uint32_t ufid_flags
)
706 return ovs_identifier_is_ufid(sfid
) &&
707 !(ufid_flags
& OVS_UFID_F_OMIT_KEY
);
710 static bool should_fill_mask(uint32_t ufid_flags
)
712 return !(ufid_flags
& OVS_UFID_F_OMIT_MASK
);
715 static bool should_fill_actions(uint32_t ufid_flags
)
717 return !(ufid_flags
& OVS_UFID_F_OMIT_ACTIONS
);
720 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions
*acts
,
721 const struct sw_flow_id
*sfid
,
724 size_t len
= NLMSG_ALIGN(sizeof(struct ovs_header
));
726 /* OVS_FLOW_ATTR_UFID */
727 if (sfid
&& ovs_identifier_is_ufid(sfid
))
728 len
+= nla_total_size(sfid
->ufid_len
);
730 /* OVS_FLOW_ATTR_KEY */
731 if (!sfid
|| should_fill_key(sfid
, ufid_flags
))
732 len
+= nla_total_size(ovs_key_attr_size());
734 /* OVS_FLOW_ATTR_MASK */
735 if (should_fill_mask(ufid_flags
))
736 len
+= nla_total_size(ovs_key_attr_size());
738 /* OVS_FLOW_ATTR_ACTIONS */
739 if (should_fill_actions(ufid_flags
))
740 len
+= nla_total_size(acts
->orig_len
);
743 + nla_total_size_64bit(sizeof(struct ovs_flow_stats
)) /* OVS_FLOW_ATTR_STATS */
744 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
745 + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */
748 /* Called with ovs_mutex or RCU read lock. */
749 static int ovs_flow_cmd_fill_stats(const struct sw_flow
*flow
,
752 struct ovs_flow_stats stats
;
756 ovs_flow_stats_get(flow
, &stats
, &used
, &tcp_flags
);
759 nla_put_u64_64bit(skb
, OVS_FLOW_ATTR_USED
, ovs_flow_used_time(used
),
763 if (stats
.n_packets
&&
764 nla_put_64bit(skb
, OVS_FLOW_ATTR_STATS
,
765 sizeof(struct ovs_flow_stats
), &stats
,
769 if ((u8
)ntohs(tcp_flags
) &&
770 nla_put_u8(skb
, OVS_FLOW_ATTR_TCP_FLAGS
, (u8
)ntohs(tcp_flags
)))
776 /* Called with ovs_mutex or RCU read lock. */
777 static int ovs_flow_cmd_fill_actions(const struct sw_flow
*flow
,
778 struct sk_buff
*skb
, int skb_orig_len
)
780 struct nlattr
*start
;
783 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
784 * this is the first flow to be dumped into 'skb'. This is unusual for
785 * Netlink but individual action lists can be longer than
786 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
787 * The userspace caller can always fetch the actions separately if it
788 * really wants them. (Most userspace callers in fact don't care.)
790 * This can only fail for dump operations because the skb is always
791 * properly sized for single flows.
793 start
= nla_nest_start(skb
, OVS_FLOW_ATTR_ACTIONS
);
795 const struct sw_flow_actions
*sf_acts
;
797 sf_acts
= rcu_dereference_ovsl(flow
->sf_acts
);
798 err
= ovs_nla_put_actions(sf_acts
->actions
,
799 sf_acts
->actions_len
, skb
);
802 nla_nest_end(skb
, start
);
807 nla_nest_cancel(skb
, start
);
809 } else if (skb_orig_len
) {
816 /* Called with ovs_mutex or RCU read lock. */
817 static int ovs_flow_cmd_fill_info(const struct sw_flow
*flow
, int dp_ifindex
,
818 struct sk_buff
*skb
, u32 portid
,
819 u32 seq
, u32 flags
, u8 cmd
, u32 ufid_flags
)
821 const int skb_orig_len
= skb
->len
;
822 struct ovs_header
*ovs_header
;
825 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_flow_genl_family
,
830 ovs_header
->dp_ifindex
= dp_ifindex
;
832 err
= ovs_nla_put_identifier(flow
, skb
);
836 if (should_fill_key(&flow
->id
, ufid_flags
)) {
837 err
= ovs_nla_put_masked_key(flow
, skb
);
842 if (should_fill_mask(ufid_flags
)) {
843 err
= ovs_nla_put_mask(flow
, skb
);
848 err
= ovs_flow_cmd_fill_stats(flow
, skb
);
852 if (should_fill_actions(ufid_flags
)) {
853 err
= ovs_flow_cmd_fill_actions(flow
, skb
, skb_orig_len
);
858 genlmsg_end(skb
, ovs_header
);
862 genlmsg_cancel(skb
, ovs_header
);
866 /* May not be called with RCU read lock. */
867 static struct sk_buff
*ovs_flow_cmd_alloc_info(const struct sw_flow_actions
*acts
,
868 const struct sw_flow_id
*sfid
,
869 struct genl_info
*info
,
876 if (!always
&& !ovs_must_notify(&dp_flow_genl_family
, info
, 0))
879 len
= ovs_flow_cmd_msg_size(acts
, sfid
, ufid_flags
);
880 skb
= genlmsg_new(len
, GFP_KERNEL
);
882 return ERR_PTR(-ENOMEM
);
887 /* Called with ovs_mutex. */
888 static struct sk_buff
*ovs_flow_cmd_build_info(const struct sw_flow
*flow
,
890 struct genl_info
*info
, u8 cmd
,
891 bool always
, u32 ufid_flags
)
896 skb
= ovs_flow_cmd_alloc_info(ovsl_dereference(flow
->sf_acts
),
897 &flow
->id
, info
, always
, ufid_flags
);
898 if (IS_ERR_OR_NULL(skb
))
901 retval
= ovs_flow_cmd_fill_info(flow
, dp_ifindex
, skb
,
902 info
->snd_portid
, info
->snd_seq
, 0,
908 static int ovs_flow_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
910 struct net
*net
= sock_net(skb
->sk
);
911 struct nlattr
**a
= info
->attrs
;
912 struct ovs_header
*ovs_header
= info
->userhdr
;
913 struct sw_flow
*flow
= NULL
, *new_flow
;
914 struct sw_flow_mask mask
;
915 struct sk_buff
*reply
;
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
, &new_flow
->key
, false, &mask
);
945 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
946 a
[OVS_FLOW_ATTR_MASK
], log
);
950 /* Extract flow identifier. */
951 error
= ovs_nla_get_identifier(&new_flow
->id
, a
[OVS_FLOW_ATTR_UFID
],
952 &new_flow
->key
, log
);
956 /* unmasked key is needed to match when ufid is not used. */
957 if (ovs_identifier_is_key(&new_flow
->id
))
958 match
.key
= new_flow
->id
.unmasked_key
;
960 ovs_flow_mask_key(&new_flow
->key
, &new_flow
->key
, true, &mask
);
962 /* Validate actions. */
963 error
= ovs_nla_copy_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
],
964 &new_flow
->key
, &acts
, log
);
966 OVS_NLERR(log
, "Flow actions may not be safe on all matching packets.");
970 reply
= ovs_flow_cmd_alloc_info(acts
, &new_flow
->id
, info
, false,
973 error
= PTR_ERR(reply
);
978 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
984 /* Check if this is a duplicate flow */
985 if (ovs_identifier_is_ufid(&new_flow
->id
))
986 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &new_flow
->id
);
988 flow
= ovs_flow_tbl_lookup(&dp
->table
, &new_flow
->key
);
990 rcu_assign_pointer(new_flow
->sf_acts
, acts
);
992 /* Put flow in bucket. */
993 error
= ovs_flow_tbl_insert(&dp
->table
, new_flow
, &mask
);
994 if (unlikely(error
)) {
999 if (unlikely(reply
)) {
1000 error
= ovs_flow_cmd_fill_info(new_flow
,
1001 ovs_header
->dp_ifindex
,
1002 reply
, info
->snd_portid
,
1010 struct sw_flow_actions
*old_acts
;
1012 /* Bail out if we're not allowed to modify an existing flow.
1013 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1014 * because Generic Netlink treats the latter as a dump
1015 * request. We also accept NLM_F_EXCL in case that bug ever
1018 if (unlikely(info
->nlhdr
->nlmsg_flags
& (NLM_F_CREATE
1021 goto err_unlock_ovs
;
1023 /* The flow identifier has to be the same for flow updates.
1024 * Look for any overlapping flow.
1026 if (unlikely(!ovs_flow_cmp(flow
, &match
))) {
1027 if (ovs_identifier_is_key(&flow
->id
))
1028 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
,
1030 else /* UFID matches but key is different */
1034 goto err_unlock_ovs
;
1037 /* Update actions. */
1038 old_acts
= ovsl_dereference(flow
->sf_acts
);
1039 rcu_assign_pointer(flow
->sf_acts
, acts
);
1041 if (unlikely(reply
)) {
1042 error
= ovs_flow_cmd_fill_info(flow
,
1043 ovs_header
->dp_ifindex
,
1044 reply
, info
->snd_portid
,
1052 ovs_nla_free_flow_actions_rcu(old_acts
);
1053 ovs_flow_free(new_flow
, false);
1057 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1064 ovs_nla_free_flow_actions(acts
);
1066 ovs_flow_free(new_flow
, false);
1071 /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */
1072 static struct sw_flow_actions
*get_flow_actions(struct net
*net
,
1073 const struct nlattr
*a
,
1074 const struct sw_flow_key
*key
,
1075 const struct sw_flow_mask
*mask
,
1078 struct sw_flow_actions
*acts
;
1079 struct sw_flow_key masked_key
;
1082 ovs_flow_mask_key(&masked_key
, key
, true, mask
);
1083 error
= ovs_nla_copy_actions(net
, a
, &masked_key
, &acts
, log
);
1086 "Actions may not be safe on all matching packets");
1087 return ERR_PTR(error
);
1093 static int ovs_flow_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1095 struct net
*net
= sock_net(skb
->sk
);
1096 struct nlattr
**a
= info
->attrs
;
1097 struct ovs_header
*ovs_header
= info
->userhdr
;
1098 struct sw_flow_key key
;
1099 struct sw_flow
*flow
;
1100 struct sw_flow_mask mask
;
1101 struct sk_buff
*reply
= NULL
;
1102 struct datapath
*dp
;
1103 struct sw_flow_actions
*old_acts
= NULL
, *acts
= NULL
;
1104 struct sw_flow_match match
;
1105 struct sw_flow_id sfid
;
1106 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1108 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1111 ufid_present
= ovs_nla_get_ufid(&sfid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1112 if (a
[OVS_FLOW_ATTR_KEY
]) {
1113 ovs_match_init(&match
, &key
, true, &mask
);
1114 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1115 a
[OVS_FLOW_ATTR_MASK
], log
);
1116 } else if (!ufid_present
) {
1118 "Flow set message rejected, Key attribute missing.");
1124 /* Validate actions. */
1125 if (a
[OVS_FLOW_ATTR_ACTIONS
]) {
1126 if (!a
[OVS_FLOW_ATTR_KEY
]) {
1128 "Flow key attribute not present in set flow.");
1133 acts
= get_flow_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
], &key
,
1136 error
= PTR_ERR(acts
);
1140 /* Can allocate before locking if have acts. */
1141 reply
= ovs_flow_cmd_alloc_info(acts
, &sfid
, info
, false,
1143 if (IS_ERR(reply
)) {
1144 error
= PTR_ERR(reply
);
1145 goto err_kfree_acts
;
1150 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1151 if (unlikely(!dp
)) {
1153 goto err_unlock_ovs
;
1155 /* Check that the flow exists. */
1157 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &sfid
);
1159 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1160 if (unlikely(!flow
)) {
1162 goto err_unlock_ovs
;
1165 /* Update actions, if present. */
1167 old_acts
= ovsl_dereference(flow
->sf_acts
);
1168 rcu_assign_pointer(flow
->sf_acts
, acts
);
1170 if (unlikely(reply
)) {
1171 error
= ovs_flow_cmd_fill_info(flow
,
1172 ovs_header
->dp_ifindex
,
1173 reply
, info
->snd_portid
,
1180 /* Could not alloc without acts before locking. */
1181 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
,
1182 info
, OVS_FLOW_CMD_NEW
, false,
1185 if (IS_ERR(reply
)) {
1186 error
= PTR_ERR(reply
);
1187 goto err_unlock_ovs
;
1192 if (a
[OVS_FLOW_ATTR_CLEAR
])
1193 ovs_flow_stats_clear(flow
);
1197 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1199 ovs_nla_free_flow_actions_rcu(old_acts
);
1207 ovs_nla_free_flow_actions(acts
);
1212 static int ovs_flow_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1214 struct nlattr
**a
= info
->attrs
;
1215 struct ovs_header
*ovs_header
= info
->userhdr
;
1216 struct net
*net
= sock_net(skb
->sk
);
1217 struct sw_flow_key key
;
1218 struct sk_buff
*reply
;
1219 struct sw_flow
*flow
;
1220 struct datapath
*dp
;
1221 struct sw_flow_match match
;
1222 struct sw_flow_id ufid
;
1223 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1225 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1228 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1229 if (a
[OVS_FLOW_ATTR_KEY
]) {
1230 ovs_match_init(&match
, &key
, true, NULL
);
1231 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
], NULL
,
1233 } else if (!ufid_present
) {
1235 "Flow get message rejected, Key attribute missing.");
1242 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1249 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1251 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1257 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
, info
,
1258 OVS_FLOW_CMD_NEW
, true, ufid_flags
);
1259 if (IS_ERR(reply
)) {
1260 err
= PTR_ERR(reply
);
1265 return genlmsg_reply(reply
, info
);
1271 static int ovs_flow_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1273 struct nlattr
**a
= info
->attrs
;
1274 struct ovs_header
*ovs_header
= info
->userhdr
;
1275 struct net
*net
= sock_net(skb
->sk
);
1276 struct sw_flow_key key
;
1277 struct sk_buff
*reply
;
1278 struct sw_flow
*flow
= NULL
;
1279 struct datapath
*dp
;
1280 struct sw_flow_match match
;
1281 struct sw_flow_id ufid
;
1282 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1284 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1287 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1288 if (a
[OVS_FLOW_ATTR_KEY
]) {
1289 ovs_match_init(&match
, &key
, true, NULL
);
1290 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1297 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1298 if (unlikely(!dp
)) {
1303 if (unlikely(!a
[OVS_FLOW_ATTR_KEY
] && !ufid_present
)) {
1304 err
= ovs_flow_tbl_flush(&dp
->table
);
1309 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1311 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1312 if (unlikely(!flow
)) {
1317 ovs_flow_tbl_remove(&dp
->table
, flow
);
1320 reply
= ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force
*) flow
->sf_acts
,
1321 &flow
->id
, info
, false, ufid_flags
);
1322 if (likely(reply
)) {
1323 if (likely(!IS_ERR(reply
))) {
1324 rcu_read_lock(); /*To keep RCU checker happy. */
1325 err
= ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
,
1326 reply
, info
->snd_portid
,
1333 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1335 netlink_set_err(sock_net(skb
->sk
)->genl_sock
, 0, 0, PTR_ERR(reply
));
1339 ovs_flow_free(flow
, true);
1346 static int ovs_flow_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1348 struct nlattr
*a
[__OVS_FLOW_ATTR_MAX
];
1349 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1350 struct table_instance
*ti
;
1351 struct datapath
*dp
;
1355 err
= genlmsg_parse(cb
->nlh
, &dp_flow_genl_family
, a
,
1356 OVS_FLOW_ATTR_MAX
, flow_policy
);
1359 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1362 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1368 ti
= rcu_dereference(dp
->table
.ti
);
1370 struct sw_flow
*flow
;
1373 bucket
= cb
->args
[0];
1375 flow
= ovs_flow_tbl_dump_next(ti
, &bucket
, &obj
);
1379 if (ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
, skb
,
1380 NETLINK_CB(cb
->skb
).portid
,
1381 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1382 OVS_FLOW_CMD_NEW
, ufid_flags
) < 0)
1385 cb
->args
[0] = bucket
;
1392 static const struct nla_policy flow_policy
[OVS_FLOW_ATTR_MAX
+ 1] = {
1393 [OVS_FLOW_ATTR_KEY
] = { .type
= NLA_NESTED
},
1394 [OVS_FLOW_ATTR_MASK
] = { .type
= NLA_NESTED
},
1395 [OVS_FLOW_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
1396 [OVS_FLOW_ATTR_CLEAR
] = { .type
= NLA_FLAG
},
1397 [OVS_FLOW_ATTR_PROBE
] = { .type
= NLA_FLAG
},
1398 [OVS_FLOW_ATTR_UFID
] = { .type
= NLA_UNSPEC
, .len
= 1 },
1399 [OVS_FLOW_ATTR_UFID_FLAGS
] = { .type
= NLA_U32
},
1402 static const struct genl_ops dp_flow_genl_ops
[] = {
1403 { .cmd
= OVS_FLOW_CMD_NEW
,
1404 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1405 .policy
= flow_policy
,
1406 .doit
= ovs_flow_cmd_new
1408 { .cmd
= OVS_FLOW_CMD_DEL
,
1409 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1410 .policy
= flow_policy
,
1411 .doit
= ovs_flow_cmd_del
1413 { .cmd
= OVS_FLOW_CMD_GET
,
1414 .flags
= 0, /* OK for unprivileged users. */
1415 .policy
= flow_policy
,
1416 .doit
= ovs_flow_cmd_get
,
1417 .dumpit
= ovs_flow_cmd_dump
1419 { .cmd
= OVS_FLOW_CMD_SET
,
1420 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1421 .policy
= flow_policy
,
1422 .doit
= ovs_flow_cmd_set
,
1426 static struct genl_family dp_flow_genl_family __ro_after_init
= {
1427 .hdrsize
= sizeof(struct ovs_header
),
1428 .name
= OVS_FLOW_FAMILY
,
1429 .version
= OVS_FLOW_VERSION
,
1430 .maxattr
= OVS_FLOW_ATTR_MAX
,
1432 .parallel_ops
= true,
1433 .ops
= dp_flow_genl_ops
,
1434 .n_ops
= ARRAY_SIZE(dp_flow_genl_ops
),
1435 .mcgrps
= &ovs_dp_flow_multicast_group
,
1437 .module
= THIS_MODULE
,
1440 static size_t ovs_dp_cmd_msg_size(void)
1442 size_t msgsize
= NLMSG_ALIGN(sizeof(struct ovs_header
));
1444 msgsize
+= nla_total_size(IFNAMSIZ
);
1445 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_stats
));
1446 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats
));
1447 msgsize
+= nla_total_size(sizeof(u32
)); /* OVS_DP_ATTR_USER_FEATURES */
1452 /* Called with ovs_mutex. */
1453 static int ovs_dp_cmd_fill_info(struct datapath
*dp
, struct sk_buff
*skb
,
1454 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1456 struct ovs_header
*ovs_header
;
1457 struct ovs_dp_stats dp_stats
;
1458 struct ovs_dp_megaflow_stats dp_megaflow_stats
;
1461 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_datapath_genl_family
,
1466 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
1468 err
= nla_put_string(skb
, OVS_DP_ATTR_NAME
, ovs_dp_name(dp
));
1470 goto nla_put_failure
;
1472 get_dp_stats(dp
, &dp_stats
, &dp_megaflow_stats
);
1473 if (nla_put_64bit(skb
, OVS_DP_ATTR_STATS
, sizeof(struct ovs_dp_stats
),
1474 &dp_stats
, OVS_DP_ATTR_PAD
))
1475 goto nla_put_failure
;
1477 if (nla_put_64bit(skb
, OVS_DP_ATTR_MEGAFLOW_STATS
,
1478 sizeof(struct ovs_dp_megaflow_stats
),
1479 &dp_megaflow_stats
, OVS_DP_ATTR_PAD
))
1480 goto nla_put_failure
;
1482 if (nla_put_u32(skb
, OVS_DP_ATTR_USER_FEATURES
, dp
->user_features
))
1483 goto nla_put_failure
;
1485 genlmsg_end(skb
, ovs_header
);
1489 genlmsg_cancel(skb
, ovs_header
);
1494 static struct sk_buff
*ovs_dp_cmd_alloc_info(void)
1496 return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL
);
1499 /* Called with rcu_read_lock or ovs_mutex. */
1500 static struct datapath
*lookup_datapath(struct net
*net
,
1501 const struct ovs_header
*ovs_header
,
1502 struct nlattr
*a
[OVS_DP_ATTR_MAX
+ 1])
1504 struct datapath
*dp
;
1506 if (!a
[OVS_DP_ATTR_NAME
])
1507 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1509 struct vport
*vport
;
1511 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_DP_ATTR_NAME
]));
1512 dp
= vport
&& vport
->port_no
== OVSP_LOCAL
? vport
->dp
: NULL
;
1514 return dp
? dp
: ERR_PTR(-ENODEV
);
1517 static void ovs_dp_reset_user_features(struct sk_buff
*skb
, struct genl_info
*info
)
1519 struct datapath
*dp
;
1521 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1525 WARN(dp
->user_features
, "Dropping previously announced user features\n");
1526 dp
->user_features
= 0;
1529 static void ovs_dp_change(struct datapath
*dp
, struct nlattr
*a
[])
1531 if (a
[OVS_DP_ATTR_USER_FEATURES
])
1532 dp
->user_features
= nla_get_u32(a
[OVS_DP_ATTR_USER_FEATURES
]);
1535 static int ovs_dp_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1537 struct nlattr
**a
= info
->attrs
;
1538 struct vport_parms parms
;
1539 struct sk_buff
*reply
;
1540 struct datapath
*dp
;
1541 struct vport
*vport
;
1542 struct ovs_net
*ovs_net
;
1546 if (!a
[OVS_DP_ATTR_NAME
] || !a
[OVS_DP_ATTR_UPCALL_PID
])
1549 reply
= ovs_dp_cmd_alloc_info();
1554 dp
= kzalloc(sizeof(*dp
), GFP_KERNEL
);
1556 goto err_free_reply
;
1558 ovs_dp_set_net(dp
, sock_net(skb
->sk
));
1560 /* Allocate table. */
1561 err
= ovs_flow_tbl_init(&dp
->table
);
1565 dp
->stats_percpu
= netdev_alloc_pcpu_stats(struct dp_stats_percpu
);
1566 if (!dp
->stats_percpu
) {
1568 goto err_destroy_table
;
1571 dp
->ports
= kmalloc(DP_VPORT_HASH_BUCKETS
* sizeof(struct hlist_head
),
1575 goto err_destroy_percpu
;
1578 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1579 INIT_HLIST_HEAD(&dp
->ports
[i
]);
1581 /* Set up our datapath device. */
1582 parms
.name
= nla_data(a
[OVS_DP_ATTR_NAME
]);
1583 parms
.type
= OVS_VPORT_TYPE_INTERNAL
;
1584 parms
.options
= NULL
;
1586 parms
.port_no
= OVSP_LOCAL
;
1587 parms
.upcall_portids
= a
[OVS_DP_ATTR_UPCALL_PID
];
1589 ovs_dp_change(dp
, a
);
1591 /* So far only local changes have been made, now need the lock. */
1594 vport
= new_vport(&parms
);
1595 if (IS_ERR(vport
)) {
1596 err
= PTR_ERR(vport
);
1600 if (err
== -EEXIST
) {
1601 /* An outdated user space instance that does not understand
1602 * the concept of user_features has attempted to create a new
1603 * datapath and is likely to reuse it. Drop all user features.
1605 if (info
->genlhdr
->version
< OVS_DP_VER_FEATURES
)
1606 ovs_dp_reset_user_features(skb
, info
);
1609 goto err_destroy_ports_array
;
1612 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1613 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1616 ovs_net
= net_generic(ovs_dp_get_net(dp
), ovs_net_id
);
1617 list_add_tail_rcu(&dp
->list_node
, &ovs_net
->dps
);
1621 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1624 err_destroy_ports_array
:
1628 free_percpu(dp
->stats_percpu
);
1630 ovs_flow_tbl_destroy(&dp
->table
);
1639 /* Called with ovs_mutex. */
1640 static void __dp_destroy(struct datapath
*dp
)
1644 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1645 struct vport
*vport
;
1646 struct hlist_node
*n
;
1648 hlist_for_each_entry_safe(vport
, n
, &dp
->ports
[i
], dp_hash_node
)
1649 if (vport
->port_no
!= OVSP_LOCAL
)
1650 ovs_dp_detach_port(vport
);
1653 list_del_rcu(&dp
->list_node
);
1655 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1656 * all ports in datapath are destroyed first before freeing datapath.
1658 ovs_dp_detach_port(ovs_vport_ovsl(dp
, OVSP_LOCAL
));
1660 /* RCU destroy the flow table */
1661 call_rcu(&dp
->rcu
, destroy_dp_rcu
);
1664 static int ovs_dp_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1666 struct sk_buff
*reply
;
1667 struct datapath
*dp
;
1670 reply
= ovs_dp_cmd_alloc_info();
1675 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1678 goto err_unlock_free
;
1680 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1681 info
->snd_seq
, 0, OVS_DP_CMD_DEL
);
1687 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1697 static int ovs_dp_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1699 struct sk_buff
*reply
;
1700 struct datapath
*dp
;
1703 reply
= ovs_dp_cmd_alloc_info();
1708 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1711 goto err_unlock_free
;
1713 ovs_dp_change(dp
, info
->attrs
);
1715 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1716 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1720 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1730 static int ovs_dp_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1732 struct sk_buff
*reply
;
1733 struct datapath
*dp
;
1736 reply
= ovs_dp_cmd_alloc_info();
1741 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1744 goto err_unlock_free
;
1746 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1747 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1751 return genlmsg_reply(reply
, info
);
1759 static int ovs_dp_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1761 struct ovs_net
*ovs_net
= net_generic(sock_net(skb
->sk
), ovs_net_id
);
1762 struct datapath
*dp
;
1763 int skip
= cb
->args
[0];
1767 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
1769 ovs_dp_cmd_fill_info(dp
, skb
, NETLINK_CB(cb
->skb
).portid
,
1770 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1771 OVS_DP_CMD_NEW
) < 0)
1782 static const struct nla_policy datapath_policy
[OVS_DP_ATTR_MAX
+ 1] = {
1783 [OVS_DP_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1784 [OVS_DP_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1785 [OVS_DP_ATTR_USER_FEATURES
] = { .type
= NLA_U32
},
1788 static const struct genl_ops dp_datapath_genl_ops
[] = {
1789 { .cmd
= OVS_DP_CMD_NEW
,
1790 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1791 .policy
= datapath_policy
,
1792 .doit
= ovs_dp_cmd_new
1794 { .cmd
= OVS_DP_CMD_DEL
,
1795 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1796 .policy
= datapath_policy
,
1797 .doit
= ovs_dp_cmd_del
1799 { .cmd
= OVS_DP_CMD_GET
,
1800 .flags
= 0, /* OK for unprivileged users. */
1801 .policy
= datapath_policy
,
1802 .doit
= ovs_dp_cmd_get
,
1803 .dumpit
= ovs_dp_cmd_dump
1805 { .cmd
= OVS_DP_CMD_SET
,
1806 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1807 .policy
= datapath_policy
,
1808 .doit
= ovs_dp_cmd_set
,
1812 static struct genl_family dp_datapath_genl_family __ro_after_init
= {
1813 .hdrsize
= sizeof(struct ovs_header
),
1814 .name
= OVS_DATAPATH_FAMILY
,
1815 .version
= OVS_DATAPATH_VERSION
,
1816 .maxattr
= OVS_DP_ATTR_MAX
,
1818 .parallel_ops
= true,
1819 .ops
= dp_datapath_genl_ops
,
1820 .n_ops
= ARRAY_SIZE(dp_datapath_genl_ops
),
1821 .mcgrps
= &ovs_dp_datapath_multicast_group
,
1823 .module
= THIS_MODULE
,
1826 /* Called with ovs_mutex or RCU read lock. */
1827 static int ovs_vport_cmd_fill_info(struct vport
*vport
, struct sk_buff
*skb
,
1828 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1830 struct ovs_header
*ovs_header
;
1831 struct ovs_vport_stats vport_stats
;
1834 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_vport_genl_family
,
1839 ovs_header
->dp_ifindex
= get_dpifindex(vport
->dp
);
1841 if (nla_put_u32(skb
, OVS_VPORT_ATTR_PORT_NO
, vport
->port_no
) ||
1842 nla_put_u32(skb
, OVS_VPORT_ATTR_TYPE
, vport
->ops
->type
) ||
1843 nla_put_string(skb
, OVS_VPORT_ATTR_NAME
,
1844 ovs_vport_name(vport
)))
1845 goto nla_put_failure
;
1847 ovs_vport_get_stats(vport
, &vport_stats
);
1848 if (nla_put_64bit(skb
, OVS_VPORT_ATTR_STATS
,
1849 sizeof(struct ovs_vport_stats
), &vport_stats
,
1850 OVS_VPORT_ATTR_PAD
))
1851 goto nla_put_failure
;
1853 if (ovs_vport_get_upcall_portids(vport
, skb
))
1854 goto nla_put_failure
;
1856 err
= ovs_vport_get_options(vport
, skb
);
1857 if (err
== -EMSGSIZE
)
1860 genlmsg_end(skb
, ovs_header
);
1866 genlmsg_cancel(skb
, ovs_header
);
1870 static struct sk_buff
*ovs_vport_cmd_alloc_info(void)
1872 return nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1875 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1876 struct sk_buff
*ovs_vport_cmd_build_info(struct vport
*vport
, u32 portid
,
1879 struct sk_buff
*skb
;
1882 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
1884 return ERR_PTR(-ENOMEM
);
1886 retval
= ovs_vport_cmd_fill_info(vport
, skb
, portid
, seq
, 0, cmd
);
1892 /* Called with ovs_mutex or RCU read lock. */
1893 static struct vport
*lookup_vport(struct net
*net
,
1894 const struct ovs_header
*ovs_header
,
1895 struct nlattr
*a
[OVS_VPORT_ATTR_MAX
+ 1])
1897 struct datapath
*dp
;
1898 struct vport
*vport
;
1900 if (a
[OVS_VPORT_ATTR_NAME
]) {
1901 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_VPORT_ATTR_NAME
]));
1903 return ERR_PTR(-ENODEV
);
1904 if (ovs_header
->dp_ifindex
&&
1905 ovs_header
->dp_ifindex
!= get_dpifindex(vport
->dp
))
1906 return ERR_PTR(-ENODEV
);
1908 } else if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
1909 u32 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1911 if (port_no
>= DP_MAX_PORTS
)
1912 return ERR_PTR(-EFBIG
);
1914 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1916 return ERR_PTR(-ENODEV
);
1918 vport
= ovs_vport_ovsl_rcu(dp
, port_no
);
1920 return ERR_PTR(-ENODEV
);
1923 return ERR_PTR(-EINVAL
);
1926 /* Called with ovs_mutex */
1927 static void update_headroom(struct datapath
*dp
)
1929 unsigned dev_headroom
, max_headroom
= 0;
1930 struct net_device
*dev
;
1931 struct vport
*vport
;
1934 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1935 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
1937 dev_headroom
= netdev_get_fwd_headroom(dev
);
1938 if (dev_headroom
> max_headroom
)
1939 max_headroom
= dev_headroom
;
1943 dp
->max_headroom
= max_headroom
;
1944 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1945 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
)
1946 netdev_set_rx_headroom(vport
->dev
, max_headroom
);
1949 static int ovs_vport_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1951 struct nlattr
**a
= info
->attrs
;
1952 struct ovs_header
*ovs_header
= info
->userhdr
;
1953 struct vport_parms parms
;
1954 struct sk_buff
*reply
;
1955 struct vport
*vport
;
1956 struct datapath
*dp
;
1960 if (!a
[OVS_VPORT_ATTR_NAME
] || !a
[OVS_VPORT_ATTR_TYPE
] ||
1961 !a
[OVS_VPORT_ATTR_UPCALL_PID
])
1964 port_no
= a
[OVS_VPORT_ATTR_PORT_NO
]
1965 ? nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]) : 0;
1966 if (port_no
>= DP_MAX_PORTS
)
1969 reply
= ovs_vport_cmd_alloc_info();
1975 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1978 goto exit_unlock_free
;
1981 vport
= ovs_vport_ovsl(dp
, port_no
);
1984 goto exit_unlock_free
;
1986 for (port_no
= 1; ; port_no
++) {
1987 if (port_no
>= DP_MAX_PORTS
) {
1989 goto exit_unlock_free
;
1991 vport
= ovs_vport_ovsl(dp
, port_no
);
1997 parms
.name
= nla_data(a
[OVS_VPORT_ATTR_NAME
]);
1998 parms
.type
= nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]);
1999 parms
.options
= a
[OVS_VPORT_ATTR_OPTIONS
];
2001 parms
.port_no
= port_no
;
2002 parms
.upcall_portids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2004 vport
= new_vport(&parms
);
2005 err
= PTR_ERR(vport
);
2006 if (IS_ERR(vport
)) {
2009 goto exit_unlock_free
;
2012 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2013 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2015 if (netdev_get_fwd_headroom(vport
->dev
) > dp
->max_headroom
)
2016 update_headroom(dp
);
2018 netdev_set_rx_headroom(vport
->dev
, dp
->max_headroom
);
2023 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2032 static int ovs_vport_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
2034 struct nlattr
**a
= info
->attrs
;
2035 struct sk_buff
*reply
;
2036 struct vport
*vport
;
2039 reply
= ovs_vport_cmd_alloc_info();
2044 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2045 err
= PTR_ERR(vport
);
2047 goto exit_unlock_free
;
2049 if (a
[OVS_VPORT_ATTR_TYPE
] &&
2050 nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]) != vport
->ops
->type
) {
2052 goto exit_unlock_free
;
2055 if (a
[OVS_VPORT_ATTR_OPTIONS
]) {
2056 err
= ovs_vport_set_options(vport
, a
[OVS_VPORT_ATTR_OPTIONS
]);
2058 goto exit_unlock_free
;
2062 if (a
[OVS_VPORT_ATTR_UPCALL_PID
]) {
2063 struct nlattr
*ids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2065 err
= ovs_vport_set_upcall_portids(vport
, ids
);
2067 goto exit_unlock_free
;
2070 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2071 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2075 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2084 static int ovs_vport_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
2086 bool must_update_headroom
= false;
2087 struct nlattr
**a
= info
->attrs
;
2088 struct sk_buff
*reply
;
2089 struct datapath
*dp
;
2090 struct vport
*vport
;
2093 reply
= ovs_vport_cmd_alloc_info();
2098 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2099 err
= PTR_ERR(vport
);
2101 goto exit_unlock_free
;
2103 if (vport
->port_no
== OVSP_LOCAL
) {
2105 goto exit_unlock_free
;
2108 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2109 info
->snd_seq
, 0, OVS_VPORT_CMD_DEL
);
2112 /* the vport deletion may trigger dp headroom update */
2114 if (netdev_get_fwd_headroom(vport
->dev
) == dp
->max_headroom
)
2115 must_update_headroom
= true;
2116 netdev_reset_rx_headroom(vport
->dev
);
2117 ovs_dp_detach_port(vport
);
2119 if (must_update_headroom
)
2120 update_headroom(dp
);
2123 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2132 static int ovs_vport_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
2134 struct nlattr
**a
= info
->attrs
;
2135 struct ovs_header
*ovs_header
= info
->userhdr
;
2136 struct sk_buff
*reply
;
2137 struct vport
*vport
;
2140 reply
= ovs_vport_cmd_alloc_info();
2145 vport
= lookup_vport(sock_net(skb
->sk
), ovs_header
, a
);
2146 err
= PTR_ERR(vport
);
2148 goto exit_unlock_free
;
2149 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2150 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2154 return genlmsg_reply(reply
, info
);
2162 static int ovs_vport_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2164 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
2165 struct datapath
*dp
;
2166 int bucket
= cb
->args
[0], skip
= cb
->args
[1];
2170 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2175 for (i
= bucket
; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2176 struct vport
*vport
;
2179 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
2181 ovs_vport_cmd_fill_info(vport
, skb
,
2182 NETLINK_CB(cb
->skb
).portid
,
2185 OVS_VPORT_CMD_NEW
) < 0)
2201 static const struct nla_policy vport_policy
[OVS_VPORT_ATTR_MAX
+ 1] = {
2202 [OVS_VPORT_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
2203 [OVS_VPORT_ATTR_STATS
] = { .len
= sizeof(struct ovs_vport_stats
) },
2204 [OVS_VPORT_ATTR_PORT_NO
] = { .type
= NLA_U32
},
2205 [OVS_VPORT_ATTR_TYPE
] = { .type
= NLA_U32
},
2206 [OVS_VPORT_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
2207 [OVS_VPORT_ATTR_OPTIONS
] = { .type
= NLA_NESTED
},
2210 static const struct genl_ops dp_vport_genl_ops
[] = {
2211 { .cmd
= OVS_VPORT_CMD_NEW
,
2212 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2213 .policy
= vport_policy
,
2214 .doit
= ovs_vport_cmd_new
2216 { .cmd
= OVS_VPORT_CMD_DEL
,
2217 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2218 .policy
= vport_policy
,
2219 .doit
= ovs_vport_cmd_del
2221 { .cmd
= OVS_VPORT_CMD_GET
,
2222 .flags
= 0, /* OK for unprivileged users. */
2223 .policy
= vport_policy
,
2224 .doit
= ovs_vport_cmd_get
,
2225 .dumpit
= ovs_vport_cmd_dump
2227 { .cmd
= OVS_VPORT_CMD_SET
,
2228 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2229 .policy
= vport_policy
,
2230 .doit
= ovs_vport_cmd_set
,
2234 struct genl_family dp_vport_genl_family __ro_after_init
= {
2235 .hdrsize
= sizeof(struct ovs_header
),
2236 .name
= OVS_VPORT_FAMILY
,
2237 .version
= OVS_VPORT_VERSION
,
2238 .maxattr
= OVS_VPORT_ATTR_MAX
,
2240 .parallel_ops
= true,
2241 .ops
= dp_vport_genl_ops
,
2242 .n_ops
= ARRAY_SIZE(dp_vport_genl_ops
),
2243 .mcgrps
= &ovs_dp_vport_multicast_group
,
2245 .module
= THIS_MODULE
,
2248 static struct genl_family
* const dp_genl_families
[] = {
2249 &dp_datapath_genl_family
,
2250 &dp_vport_genl_family
,
2251 &dp_flow_genl_family
,
2252 &dp_packet_genl_family
,
2255 static void dp_unregister_genl(int n_families
)
2259 for (i
= 0; i
< n_families
; i
++)
2260 genl_unregister_family(dp_genl_families
[i
]);
2263 static int __init
dp_register_genl(void)
2268 for (i
= 0; i
< ARRAY_SIZE(dp_genl_families
); i
++) {
2270 err
= genl_register_family(dp_genl_families
[i
]);
2278 dp_unregister_genl(i
);
2282 static int __net_init
ovs_init_net(struct net
*net
)
2284 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2286 INIT_LIST_HEAD(&ovs_net
->dps
);
2287 INIT_WORK(&ovs_net
->dp_notify_work
, ovs_dp_notify_wq
);
2292 static void __net_exit
list_vports_from_net(struct net
*net
, struct net
*dnet
,
2293 struct list_head
*head
)
2295 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2296 struct datapath
*dp
;
2298 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
2301 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2302 struct vport
*vport
;
2304 hlist_for_each_entry(vport
, &dp
->ports
[i
], dp_hash_node
) {
2305 if (vport
->ops
->type
!= OVS_VPORT_TYPE_INTERNAL
)
2308 if (dev_net(vport
->dev
) == dnet
)
2309 list_add(&vport
->detach_list
, head
);
2315 static void __net_exit
ovs_exit_net(struct net
*dnet
)
2317 struct datapath
*dp
, *dp_next
;
2318 struct ovs_net
*ovs_net
= net_generic(dnet
, ovs_net_id
);
2319 struct vport
*vport
, *vport_next
;
2325 list_for_each_entry_safe(dp
, dp_next
, &ovs_net
->dps
, list_node
)
2330 list_vports_from_net(net
, dnet
, &head
);
2333 /* Detach all vports from given namespace. */
2334 list_for_each_entry_safe(vport
, vport_next
, &head
, detach_list
) {
2335 list_del(&vport
->detach_list
);
2336 ovs_dp_detach_port(vport
);
2341 cancel_work_sync(&ovs_net
->dp_notify_work
);
2344 static struct pernet_operations ovs_net_ops
= {
2345 .init
= ovs_init_net
,
2346 .exit
= ovs_exit_net
,
2348 .size
= sizeof(struct ovs_net
),
2351 static int __init
dp_init(void)
2355 BUILD_BUG_ON(sizeof(struct ovs_skb_cb
) > FIELD_SIZEOF(struct sk_buff
, cb
));
2357 pr_info("Open vSwitch switching datapath\n");
2359 err
= action_fifos_init();
2363 err
= ovs_internal_dev_rtnl_link_register();
2365 goto error_action_fifos_exit
;
2367 err
= ovs_flow_init();
2369 goto error_unreg_rtnl_link
;
2371 err
= ovs_vport_init();
2373 goto error_flow_exit
;
2375 err
= register_pernet_device(&ovs_net_ops
);
2377 goto error_vport_exit
;
2379 err
= register_netdevice_notifier(&ovs_dp_device_notifier
);
2381 goto error_netns_exit
;
2383 err
= ovs_netdev_init();
2385 goto error_unreg_notifier
;
2387 err
= dp_register_genl();
2389 goto error_unreg_netdev
;
2395 error_unreg_notifier
:
2396 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2398 unregister_pernet_device(&ovs_net_ops
);
2403 error_unreg_rtnl_link
:
2404 ovs_internal_dev_rtnl_link_unregister();
2405 error_action_fifos_exit
:
2406 action_fifos_exit();
2411 static void dp_cleanup(void)
2413 dp_unregister_genl(ARRAY_SIZE(dp_genl_families
));
2415 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2416 unregister_pernet_device(&ovs_net_ops
);
2420 ovs_internal_dev_rtnl_link_unregister();
2421 action_fifos_exit();
2424 module_init(dp_init
);
2425 module_exit(dp_cleanup
);
2427 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2428 MODULE_LICENSE("GPL");
2429 MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY
);
2430 MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY
);
2431 MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY
);
2432 MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY
);