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"
59 #include "vport-internal_dev.h"
60 #include "vport-netdev.h"
62 unsigned int ovs_net_id __read_mostly
;
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
);
136 static struct vport
*new_vport(const struct vport_parms
*);
137 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*,
138 const struct sw_flow_key
*,
139 const struct dp_upcall_info
*,
141 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*,
142 const struct sw_flow_key
*,
143 const struct dp_upcall_info
*,
146 /* Must be called with rcu_read_lock or ovs_mutex. */
147 const char *ovs_dp_name(const struct datapath
*dp
)
149 struct vport
*vport
= ovs_vport_ovsl_rcu(dp
, OVSP_LOCAL
);
150 return ovs_vport_name(vport
);
153 static int get_dpifindex(const struct datapath
*dp
)
160 local
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
162 ifindex
= local
->dev
->ifindex
;
171 static void destroy_dp_rcu(struct rcu_head
*rcu
)
173 struct datapath
*dp
= container_of(rcu
, struct datapath
, rcu
);
175 ovs_flow_tbl_destroy(&dp
->table
);
176 free_percpu(dp
->stats_percpu
);
182 static struct hlist_head
*vport_hash_bucket(const struct datapath
*dp
,
185 return &dp
->ports
[port_no
& (DP_VPORT_HASH_BUCKETS
- 1)];
188 /* Called with ovs_mutex or RCU read lock. */
189 struct vport
*ovs_lookup_vport(const struct datapath
*dp
, u16 port_no
)
192 struct hlist_head
*head
;
194 head
= vport_hash_bucket(dp
, port_no
);
195 hlist_for_each_entry_rcu(vport
, head
, dp_hash_node
) {
196 if (vport
->port_no
== port_no
)
202 /* Called with ovs_mutex. */
203 static struct vport
*new_vport(const struct vport_parms
*parms
)
207 vport
= ovs_vport_add(parms
);
208 if (!IS_ERR(vport
)) {
209 struct datapath
*dp
= parms
->dp
;
210 struct hlist_head
*head
= vport_hash_bucket(dp
, vport
->port_no
);
212 hlist_add_head_rcu(&vport
->dp_hash_node
, head
);
217 void ovs_dp_detach_port(struct vport
*p
)
221 /* First drop references to device. */
222 hlist_del_rcu(&p
->dp_hash_node
);
224 /* Then destroy it. */
228 /* Must be called with rcu_read_lock. */
229 void ovs_dp_process_packet(struct sk_buff
*skb
, struct sw_flow_key
*key
)
231 const struct vport
*p
= OVS_CB(skb
)->input_vport
;
232 struct datapath
*dp
= p
->dp
;
233 struct sw_flow
*flow
;
234 struct sw_flow_actions
*sf_acts
;
235 struct dp_stats_percpu
*stats
;
239 stats
= this_cpu_ptr(dp
->stats_percpu
);
242 flow
= ovs_flow_tbl_lookup_stats(&dp
->table
, key
, &n_mask_hit
);
243 if (unlikely(!flow
)) {
244 struct dp_upcall_info upcall
;
247 memset(&upcall
, 0, sizeof(upcall
));
248 upcall
.cmd
= OVS_PACKET_CMD_MISS
;
249 upcall
.portid
= ovs_vport_find_upcall_portid(p
, skb
);
250 upcall
.mru
= OVS_CB(skb
)->mru
;
251 error
= ovs_dp_upcall(dp
, skb
, key
, &upcall
, 0);
256 stats_counter
= &stats
->n_missed
;
260 ovs_flow_stats_update(flow
, key
->tp
.flags
, skb
);
261 sf_acts
= rcu_dereference(flow
->sf_acts
);
262 ovs_execute_actions(dp
, skb
, sf_acts
, key
);
264 stats_counter
= &stats
->n_hit
;
267 /* Update datapath statistics. */
268 u64_stats_update_begin(&stats
->syncp
);
270 stats
->n_mask_hit
+= n_mask_hit
;
271 u64_stats_update_end(&stats
->syncp
);
274 int ovs_dp_upcall(struct datapath
*dp
, struct sk_buff
*skb
,
275 const struct sw_flow_key
*key
,
276 const struct dp_upcall_info
*upcall_info
,
279 struct dp_stats_percpu
*stats
;
282 if (upcall_info
->portid
== 0) {
287 if (!skb_is_gso(skb
))
288 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
290 err
= queue_gso_packets(dp
, skb
, key
, upcall_info
, cutlen
);
297 stats
= this_cpu_ptr(dp
->stats_percpu
);
299 u64_stats_update_begin(&stats
->syncp
);
301 u64_stats_update_end(&stats
->syncp
);
306 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*skb
,
307 const struct sw_flow_key
*key
,
308 const struct dp_upcall_info
*upcall_info
,
311 unsigned int gso_type
= skb_shinfo(skb
)->gso_type
;
312 struct sw_flow_key later_key
;
313 struct sk_buff
*segs
, *nskb
;
316 BUILD_BUG_ON(sizeof(*OVS_CB(skb
)) > SKB_SGO_CB_OFFSET
);
317 segs
= __skb_gso_segment(skb
, NETIF_F_SG
, false);
319 return PTR_ERR(segs
);
323 if (gso_type
& SKB_GSO_UDP
) {
324 /* The initial flow key extracted by ovs_flow_key_extract()
325 * in this case is for a first fragment, so we need to
326 * properly mark later fragments.
329 later_key
.ip
.frag
= OVS_FRAG_TYPE_LATER
;
332 /* Queue all of the segments. */
335 if (gso_type
& SKB_GSO_UDP
&& skb
!= segs
)
338 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
342 } while ((skb
= skb
->next
));
344 /* Free all of the segments. */
352 } while ((skb
= nskb
));
356 static size_t upcall_msg_size(const struct dp_upcall_info
*upcall_info
,
357 unsigned int hdrlen
, int actions_attrlen
)
359 size_t size
= NLMSG_ALIGN(sizeof(struct ovs_header
))
360 + nla_total_size(hdrlen
) /* OVS_PACKET_ATTR_PACKET */
361 + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */
362 + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */
364 /* OVS_PACKET_ATTR_USERDATA */
365 if (upcall_info
->userdata
)
366 size
+= NLA_ALIGN(upcall_info
->userdata
->nla_len
);
368 /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */
369 if (upcall_info
->egress_tun_info
)
370 size
+= nla_total_size(ovs_tun_key_attr_size());
372 /* OVS_PACKET_ATTR_ACTIONS */
373 if (upcall_info
->actions_len
)
374 size
+= nla_total_size(actions_attrlen
);
376 /* OVS_PACKET_ATTR_MRU */
377 if (upcall_info
->mru
)
378 size
+= nla_total_size(sizeof(upcall_info
->mru
));
383 static void pad_packet(struct datapath
*dp
, struct sk_buff
*skb
)
385 if (!(dp
->user_features
& OVS_DP_F_UNALIGNED
)) {
386 size_t plen
= NLA_ALIGN(skb
->len
) - skb
->len
;
389 skb_put_zero(skb
, plen
);
393 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*skb
,
394 const struct sw_flow_key
*key
,
395 const struct dp_upcall_info
*upcall_info
,
398 struct ovs_header
*upcall
;
399 struct sk_buff
*nskb
= NULL
;
400 struct sk_buff
*user_skb
= NULL
; /* to be queued to userspace */
406 dp_ifindex
= get_dpifindex(dp
);
410 if (skb_vlan_tag_present(skb
)) {
411 nskb
= skb_clone(skb
, GFP_ATOMIC
);
415 nskb
= __vlan_hwaccel_push_inside(nskb
);
422 if (nla_attr_size(skb
->len
) > USHRT_MAX
) {
427 /* Complete checksum if needed */
428 if (skb
->ip_summed
== CHECKSUM_PARTIAL
&&
429 (err
= skb_csum_hwoffload_help(skb
, 0)))
432 /* Older versions of OVS user space enforce alignment of the last
433 * Netlink attribute to NLA_ALIGNTO which would require extensive
434 * padding logic. Only perform zerocopy if padding is not required.
436 if (dp
->user_features
& OVS_DP_F_UNALIGNED
)
437 hlen
= skb_zerocopy_headlen(skb
);
441 len
= upcall_msg_size(upcall_info
, hlen
- cutlen
,
442 OVS_CB(skb
)->acts_origlen
);
443 user_skb
= genlmsg_new(len
, GFP_ATOMIC
);
449 upcall
= genlmsg_put(user_skb
, 0, 0, &dp_packet_genl_family
,
450 0, upcall_info
->cmd
);
455 upcall
->dp_ifindex
= dp_ifindex
;
457 err
= ovs_nla_put_key(key
, key
, OVS_PACKET_ATTR_KEY
, false, user_skb
);
461 if (upcall_info
->userdata
)
462 __nla_put(user_skb
, OVS_PACKET_ATTR_USERDATA
,
463 nla_len(upcall_info
->userdata
),
464 nla_data(upcall_info
->userdata
));
466 if (upcall_info
->egress_tun_info
) {
467 nla
= nla_nest_start_noflag(user_skb
,
468 OVS_PACKET_ATTR_EGRESS_TUN_KEY
);
473 err
= ovs_nla_put_tunnel_info(user_skb
,
474 upcall_info
->egress_tun_info
);
478 nla_nest_end(user_skb
, nla
);
481 if (upcall_info
->actions_len
) {
482 nla
= nla_nest_start_noflag(user_skb
, OVS_PACKET_ATTR_ACTIONS
);
487 err
= ovs_nla_put_actions(upcall_info
->actions
,
488 upcall_info
->actions_len
,
491 nla_nest_end(user_skb
, nla
);
493 nla_nest_cancel(user_skb
, nla
);
496 /* Add OVS_PACKET_ATTR_MRU */
497 if (upcall_info
->mru
) {
498 if (nla_put_u16(user_skb
, OVS_PACKET_ATTR_MRU
,
503 pad_packet(dp
, user_skb
);
506 /* Add OVS_PACKET_ATTR_LEN when packet is truncated */
508 if (nla_put_u32(user_skb
, OVS_PACKET_ATTR_LEN
,
513 pad_packet(dp
, user_skb
);
516 /* Only reserve room for attribute header, packet data is added
517 * in skb_zerocopy() */
518 if (!(nla
= nla_reserve(user_skb
, OVS_PACKET_ATTR_PACKET
, 0))) {
522 nla
->nla_len
= nla_attr_size(skb
->len
- cutlen
);
524 err
= skb_zerocopy(user_skb
, skb
, skb
->len
- cutlen
, hlen
);
528 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
529 pad_packet(dp
, user_skb
);
531 ((struct nlmsghdr
*) user_skb
->data
)->nlmsg_len
= user_skb
->len
;
533 err
= genlmsg_unicast(ovs_dp_get_net(dp
), user_skb
, upcall_info
->portid
);
543 static int ovs_packet_cmd_execute(struct sk_buff
*skb
, struct genl_info
*info
)
545 struct ovs_header
*ovs_header
= info
->userhdr
;
546 struct net
*net
= sock_net(skb
->sk
);
547 struct nlattr
**a
= info
->attrs
;
548 struct sw_flow_actions
*acts
;
549 struct sk_buff
*packet
;
550 struct sw_flow
*flow
;
551 struct sw_flow_actions
*sf_acts
;
553 struct vport
*input_vport
;
557 bool log
= !a
[OVS_PACKET_ATTR_PROBE
];
560 if (!a
[OVS_PACKET_ATTR_PACKET
] || !a
[OVS_PACKET_ATTR_KEY
] ||
561 !a
[OVS_PACKET_ATTR_ACTIONS
])
564 len
= nla_len(a
[OVS_PACKET_ATTR_PACKET
]);
565 packet
= __dev_alloc_skb(NET_IP_ALIGN
+ len
, GFP_KERNEL
);
569 skb_reserve(packet
, NET_IP_ALIGN
);
571 nla_memcpy(__skb_put(packet
, len
), a
[OVS_PACKET_ATTR_PACKET
], len
);
573 /* Set packet's mru */
574 if (a
[OVS_PACKET_ATTR_MRU
]) {
575 mru
= nla_get_u16(a
[OVS_PACKET_ATTR_MRU
]);
576 packet
->ignore_df
= 1;
578 OVS_CB(packet
)->mru
= mru
;
580 /* Build an sw_flow for sending this packet. */
581 flow
= ovs_flow_alloc();
586 err
= ovs_flow_key_extract_userspace(net
, a
[OVS_PACKET_ATTR_KEY
],
587 packet
, &flow
->key
, log
);
591 err
= ovs_nla_copy_actions(net
, a
[OVS_PACKET_ATTR_ACTIONS
],
592 &flow
->key
, &acts
, log
);
596 rcu_assign_pointer(flow
->sf_acts
, acts
);
597 packet
->priority
= flow
->key
.phy
.priority
;
598 packet
->mark
= flow
->key
.phy
.skb_mark
;
601 dp
= get_dp_rcu(net
, ovs_header
->dp_ifindex
);
606 input_vport
= ovs_vport_rcu(dp
, flow
->key
.phy
.in_port
);
608 input_vport
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
613 packet
->dev
= input_vport
->dev
;
614 OVS_CB(packet
)->input_vport
= input_vport
;
615 sf_acts
= rcu_dereference(flow
->sf_acts
);
618 err
= ovs_execute_actions(dp
, packet
, sf_acts
, &flow
->key
);
622 ovs_flow_free(flow
, false);
628 ovs_flow_free(flow
, false);
635 static const struct nla_policy packet_policy
[OVS_PACKET_ATTR_MAX
+ 1] = {
636 [OVS_PACKET_ATTR_PACKET
] = { .len
= ETH_HLEN
},
637 [OVS_PACKET_ATTR_KEY
] = { .type
= NLA_NESTED
},
638 [OVS_PACKET_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
639 [OVS_PACKET_ATTR_PROBE
] = { .type
= NLA_FLAG
},
640 [OVS_PACKET_ATTR_MRU
] = { .type
= NLA_U16
},
643 static const struct genl_ops dp_packet_genl_ops
[] = {
644 { .cmd
= OVS_PACKET_CMD_EXECUTE
,
645 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
646 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
647 .doit
= ovs_packet_cmd_execute
651 static struct genl_family dp_packet_genl_family __ro_after_init
= {
652 .hdrsize
= sizeof(struct ovs_header
),
653 .name
= OVS_PACKET_FAMILY
,
654 .version
= OVS_PACKET_VERSION
,
655 .maxattr
= OVS_PACKET_ATTR_MAX
,
656 .policy
= packet_policy
,
658 .parallel_ops
= true,
659 .ops
= dp_packet_genl_ops
,
660 .n_ops
= ARRAY_SIZE(dp_packet_genl_ops
),
661 .module
= THIS_MODULE
,
664 static void get_dp_stats(const struct datapath
*dp
, struct ovs_dp_stats
*stats
,
665 struct ovs_dp_megaflow_stats
*mega_stats
)
669 memset(mega_stats
, 0, sizeof(*mega_stats
));
671 stats
->n_flows
= ovs_flow_tbl_count(&dp
->table
);
672 mega_stats
->n_masks
= ovs_flow_tbl_num_masks(&dp
->table
);
674 stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
676 for_each_possible_cpu(i
) {
677 const struct dp_stats_percpu
*percpu_stats
;
678 struct dp_stats_percpu local_stats
;
681 percpu_stats
= per_cpu_ptr(dp
->stats_percpu
, i
);
684 start
= u64_stats_fetch_begin_irq(&percpu_stats
->syncp
);
685 local_stats
= *percpu_stats
;
686 } while (u64_stats_fetch_retry_irq(&percpu_stats
->syncp
, start
));
688 stats
->n_hit
+= local_stats
.n_hit
;
689 stats
->n_missed
+= local_stats
.n_missed
;
690 stats
->n_lost
+= local_stats
.n_lost
;
691 mega_stats
->n_mask_hit
+= local_stats
.n_mask_hit
;
695 static bool should_fill_key(const struct sw_flow_id
*sfid
, uint32_t ufid_flags
)
697 return ovs_identifier_is_ufid(sfid
) &&
698 !(ufid_flags
& OVS_UFID_F_OMIT_KEY
);
701 static bool should_fill_mask(uint32_t ufid_flags
)
703 return !(ufid_flags
& OVS_UFID_F_OMIT_MASK
);
706 static bool should_fill_actions(uint32_t ufid_flags
)
708 return !(ufid_flags
& OVS_UFID_F_OMIT_ACTIONS
);
711 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions
*acts
,
712 const struct sw_flow_id
*sfid
,
715 size_t len
= NLMSG_ALIGN(sizeof(struct ovs_header
));
717 /* OVS_FLOW_ATTR_UFID */
718 if (sfid
&& ovs_identifier_is_ufid(sfid
))
719 len
+= nla_total_size(sfid
->ufid_len
);
721 /* OVS_FLOW_ATTR_KEY */
722 if (!sfid
|| should_fill_key(sfid
, ufid_flags
))
723 len
+= nla_total_size(ovs_key_attr_size());
725 /* OVS_FLOW_ATTR_MASK */
726 if (should_fill_mask(ufid_flags
))
727 len
+= nla_total_size(ovs_key_attr_size());
729 /* OVS_FLOW_ATTR_ACTIONS */
730 if (should_fill_actions(ufid_flags
))
731 len
+= nla_total_size(acts
->orig_len
);
734 + nla_total_size_64bit(sizeof(struct ovs_flow_stats
)) /* OVS_FLOW_ATTR_STATS */
735 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
736 + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */
739 /* Called with ovs_mutex or RCU read lock. */
740 static int ovs_flow_cmd_fill_stats(const struct sw_flow
*flow
,
743 struct ovs_flow_stats stats
;
747 ovs_flow_stats_get(flow
, &stats
, &used
, &tcp_flags
);
750 nla_put_u64_64bit(skb
, OVS_FLOW_ATTR_USED
, ovs_flow_used_time(used
),
754 if (stats
.n_packets
&&
755 nla_put_64bit(skb
, OVS_FLOW_ATTR_STATS
,
756 sizeof(struct ovs_flow_stats
), &stats
,
760 if ((u8
)ntohs(tcp_flags
) &&
761 nla_put_u8(skb
, OVS_FLOW_ATTR_TCP_FLAGS
, (u8
)ntohs(tcp_flags
)))
767 /* Called with ovs_mutex or RCU read lock. */
768 static int ovs_flow_cmd_fill_actions(const struct sw_flow
*flow
,
769 struct sk_buff
*skb
, int skb_orig_len
)
771 struct nlattr
*start
;
774 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
775 * this is the first flow to be dumped into 'skb'. This is unusual for
776 * Netlink but individual action lists can be longer than
777 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
778 * The userspace caller can always fetch the actions separately if it
779 * really wants them. (Most userspace callers in fact don't care.)
781 * This can only fail for dump operations because the skb is always
782 * properly sized for single flows.
784 start
= nla_nest_start_noflag(skb
, OVS_FLOW_ATTR_ACTIONS
);
786 const struct sw_flow_actions
*sf_acts
;
788 sf_acts
= rcu_dereference_ovsl(flow
->sf_acts
);
789 err
= ovs_nla_put_actions(sf_acts
->actions
,
790 sf_acts
->actions_len
, skb
);
793 nla_nest_end(skb
, start
);
798 nla_nest_cancel(skb
, start
);
800 } else if (skb_orig_len
) {
807 /* Called with ovs_mutex or RCU read lock. */
808 static int ovs_flow_cmd_fill_info(const struct sw_flow
*flow
, int dp_ifindex
,
809 struct sk_buff
*skb
, u32 portid
,
810 u32 seq
, u32 flags
, u8 cmd
, u32 ufid_flags
)
812 const int skb_orig_len
= skb
->len
;
813 struct ovs_header
*ovs_header
;
816 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_flow_genl_family
,
821 ovs_header
->dp_ifindex
= dp_ifindex
;
823 err
= ovs_nla_put_identifier(flow
, skb
);
827 if (should_fill_key(&flow
->id
, ufid_flags
)) {
828 err
= ovs_nla_put_masked_key(flow
, skb
);
833 if (should_fill_mask(ufid_flags
)) {
834 err
= ovs_nla_put_mask(flow
, skb
);
839 err
= ovs_flow_cmd_fill_stats(flow
, skb
);
843 if (should_fill_actions(ufid_flags
)) {
844 err
= ovs_flow_cmd_fill_actions(flow
, skb
, skb_orig_len
);
849 genlmsg_end(skb
, ovs_header
);
853 genlmsg_cancel(skb
, ovs_header
);
857 /* May not be called with RCU read lock. */
858 static struct sk_buff
*ovs_flow_cmd_alloc_info(const struct sw_flow_actions
*acts
,
859 const struct sw_flow_id
*sfid
,
860 struct genl_info
*info
,
867 if (!always
&& !ovs_must_notify(&dp_flow_genl_family
, info
, 0))
870 len
= ovs_flow_cmd_msg_size(acts
, sfid
, ufid_flags
);
871 skb
= genlmsg_new(len
, GFP_KERNEL
);
873 return ERR_PTR(-ENOMEM
);
878 /* Called with ovs_mutex. */
879 static struct sk_buff
*ovs_flow_cmd_build_info(const struct sw_flow
*flow
,
881 struct genl_info
*info
, u8 cmd
,
882 bool always
, u32 ufid_flags
)
887 skb
= ovs_flow_cmd_alloc_info(ovsl_dereference(flow
->sf_acts
),
888 &flow
->id
, info
, always
, ufid_flags
);
889 if (IS_ERR_OR_NULL(skb
))
892 retval
= ovs_flow_cmd_fill_info(flow
, dp_ifindex
, skb
,
893 info
->snd_portid
, info
->snd_seq
, 0,
899 static int ovs_flow_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
901 struct net
*net
= sock_net(skb
->sk
);
902 struct nlattr
**a
= info
->attrs
;
903 struct ovs_header
*ovs_header
= info
->userhdr
;
904 struct sw_flow
*flow
= NULL
, *new_flow
;
905 struct sw_flow_mask mask
;
906 struct sk_buff
*reply
;
908 struct sw_flow_actions
*acts
;
909 struct sw_flow_match match
;
910 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
912 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
914 /* Must have key and actions. */
916 if (!a
[OVS_FLOW_ATTR_KEY
]) {
917 OVS_NLERR(log
, "Flow key attr not present in new flow.");
920 if (!a
[OVS_FLOW_ATTR_ACTIONS
]) {
921 OVS_NLERR(log
, "Flow actions attr not present in new flow.");
925 /* Most of the time we need to allocate a new flow, do it before
928 new_flow
= ovs_flow_alloc();
929 if (IS_ERR(new_flow
)) {
930 error
= PTR_ERR(new_flow
);
935 ovs_match_init(&match
, &new_flow
->key
, false, &mask
);
936 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
937 a
[OVS_FLOW_ATTR_MASK
], log
);
941 /* Extract flow identifier. */
942 error
= ovs_nla_get_identifier(&new_flow
->id
, a
[OVS_FLOW_ATTR_UFID
],
943 &new_flow
->key
, log
);
947 /* unmasked key is needed to match when ufid is not used. */
948 if (ovs_identifier_is_key(&new_flow
->id
))
949 match
.key
= new_flow
->id
.unmasked_key
;
951 ovs_flow_mask_key(&new_flow
->key
, &new_flow
->key
, true, &mask
);
953 /* Validate actions. */
954 error
= ovs_nla_copy_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
],
955 &new_flow
->key
, &acts
, log
);
957 OVS_NLERR(log
, "Flow actions may not be safe on all matching packets.");
961 reply
= ovs_flow_cmd_alloc_info(acts
, &new_flow
->id
, info
, false,
964 error
= PTR_ERR(reply
);
969 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
975 /* Check if this is a duplicate flow */
976 if (ovs_identifier_is_ufid(&new_flow
->id
))
977 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &new_flow
->id
);
979 flow
= ovs_flow_tbl_lookup(&dp
->table
, &new_flow
->key
);
981 rcu_assign_pointer(new_flow
->sf_acts
, acts
);
983 /* Put flow in bucket. */
984 error
= ovs_flow_tbl_insert(&dp
->table
, new_flow
, &mask
);
985 if (unlikely(error
)) {
990 if (unlikely(reply
)) {
991 error
= ovs_flow_cmd_fill_info(new_flow
,
992 ovs_header
->dp_ifindex
,
993 reply
, info
->snd_portid
,
1001 struct sw_flow_actions
*old_acts
;
1003 /* Bail out if we're not allowed to modify an existing flow.
1004 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1005 * because Generic Netlink treats the latter as a dump
1006 * request. We also accept NLM_F_EXCL in case that bug ever
1009 if (unlikely(info
->nlhdr
->nlmsg_flags
& (NLM_F_CREATE
1012 goto err_unlock_ovs
;
1014 /* The flow identifier has to be the same for flow updates.
1015 * Look for any overlapping flow.
1017 if (unlikely(!ovs_flow_cmp(flow
, &match
))) {
1018 if (ovs_identifier_is_key(&flow
->id
))
1019 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
,
1021 else /* UFID matches but key is different */
1025 goto err_unlock_ovs
;
1028 /* Update actions. */
1029 old_acts
= ovsl_dereference(flow
->sf_acts
);
1030 rcu_assign_pointer(flow
->sf_acts
, acts
);
1032 if (unlikely(reply
)) {
1033 error
= ovs_flow_cmd_fill_info(flow
,
1034 ovs_header
->dp_ifindex
,
1035 reply
, info
->snd_portid
,
1043 ovs_nla_free_flow_actions_rcu(old_acts
);
1044 ovs_flow_free(new_flow
, false);
1048 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1055 ovs_nla_free_flow_actions(acts
);
1057 ovs_flow_free(new_flow
, false);
1062 /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */
1063 static struct sw_flow_actions
*get_flow_actions(struct net
*net
,
1064 const struct nlattr
*a
,
1065 const struct sw_flow_key
*key
,
1066 const struct sw_flow_mask
*mask
,
1069 struct sw_flow_actions
*acts
;
1070 struct sw_flow_key masked_key
;
1073 ovs_flow_mask_key(&masked_key
, key
, true, mask
);
1074 error
= ovs_nla_copy_actions(net
, a
, &masked_key
, &acts
, log
);
1077 "Actions may not be safe on all matching packets");
1078 return ERR_PTR(error
);
1084 /* Factor out match-init and action-copy to avoid
1085 * "Wframe-larger-than=1024" warning. Because mask is only
1086 * used to get actions, we new a function to save some
1089 * If there are not key and action attrs, we return 0
1090 * directly. In the case, the caller will also not use the
1091 * match as before. If there is action attr, we try to get
1092 * actions and save them to *acts. Before returning from
1093 * the function, we reset the match->mask pointer. Because
1094 * we should not to return match object with dangling reference
1097 static int ovs_nla_init_match_and_action(struct net
*net
,
1098 struct sw_flow_match
*match
,
1099 struct sw_flow_key
*key
,
1101 struct sw_flow_actions
**acts
,
1104 struct sw_flow_mask mask
;
1107 if (a
[OVS_FLOW_ATTR_KEY
]) {
1108 ovs_match_init(match
, key
, true, &mask
);
1109 error
= ovs_nla_get_match(net
, match
, a
[OVS_FLOW_ATTR_KEY
],
1110 a
[OVS_FLOW_ATTR_MASK
], log
);
1115 if (a
[OVS_FLOW_ATTR_ACTIONS
]) {
1116 if (!a
[OVS_FLOW_ATTR_KEY
]) {
1118 "Flow key attribute not present in set flow.");
1123 *acts
= get_flow_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
], key
,
1125 if (IS_ERR(*acts
)) {
1126 error
= PTR_ERR(*acts
);
1131 /* On success, error is 0. */
1137 static int ovs_flow_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1139 struct net
*net
= sock_net(skb
->sk
);
1140 struct nlattr
**a
= info
->attrs
;
1141 struct ovs_header
*ovs_header
= info
->userhdr
;
1142 struct sw_flow_key key
;
1143 struct sw_flow
*flow
;
1144 struct sk_buff
*reply
= NULL
;
1145 struct datapath
*dp
;
1146 struct sw_flow_actions
*old_acts
= NULL
, *acts
= NULL
;
1147 struct sw_flow_match match
;
1148 struct sw_flow_id sfid
;
1149 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1151 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1154 ufid_present
= ovs_nla_get_ufid(&sfid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1155 if (!a
[OVS_FLOW_ATTR_KEY
] && !ufid_present
) {
1157 "Flow set message rejected, Key attribute missing.");
1161 error
= ovs_nla_init_match_and_action(net
, &match
, &key
, a
,
1167 /* Can allocate before locking if have acts. */
1168 reply
= ovs_flow_cmd_alloc_info(acts
, &sfid
, info
, false,
1170 if (IS_ERR(reply
)) {
1171 error
= PTR_ERR(reply
);
1172 goto err_kfree_acts
;
1177 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1178 if (unlikely(!dp
)) {
1180 goto err_unlock_ovs
;
1182 /* Check that the flow exists. */
1184 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &sfid
);
1186 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1187 if (unlikely(!flow
)) {
1189 goto err_unlock_ovs
;
1192 /* Update actions, if present. */
1194 old_acts
= ovsl_dereference(flow
->sf_acts
);
1195 rcu_assign_pointer(flow
->sf_acts
, acts
);
1197 if (unlikely(reply
)) {
1198 error
= ovs_flow_cmd_fill_info(flow
,
1199 ovs_header
->dp_ifindex
,
1200 reply
, info
->snd_portid
,
1207 /* Could not alloc without acts before locking. */
1208 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
,
1209 info
, OVS_FLOW_CMD_SET
, false,
1212 if (IS_ERR(reply
)) {
1213 error
= PTR_ERR(reply
);
1214 goto err_unlock_ovs
;
1219 if (a
[OVS_FLOW_ATTR_CLEAR
])
1220 ovs_flow_stats_clear(flow
);
1224 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1226 ovs_nla_free_flow_actions_rcu(old_acts
);
1234 ovs_nla_free_flow_actions(acts
);
1239 static int ovs_flow_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1241 struct nlattr
**a
= info
->attrs
;
1242 struct ovs_header
*ovs_header
= info
->userhdr
;
1243 struct net
*net
= sock_net(skb
->sk
);
1244 struct sw_flow_key key
;
1245 struct sk_buff
*reply
;
1246 struct sw_flow
*flow
;
1247 struct datapath
*dp
;
1248 struct sw_flow_match match
;
1249 struct sw_flow_id ufid
;
1250 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1252 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1255 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1256 if (a
[OVS_FLOW_ATTR_KEY
]) {
1257 ovs_match_init(&match
, &key
, true, NULL
);
1258 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
], NULL
,
1260 } else if (!ufid_present
) {
1262 "Flow get message rejected, Key attribute missing.");
1269 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1276 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1278 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1284 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
, info
,
1285 OVS_FLOW_CMD_GET
, true, ufid_flags
);
1286 if (IS_ERR(reply
)) {
1287 err
= PTR_ERR(reply
);
1292 return genlmsg_reply(reply
, info
);
1298 static int ovs_flow_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1300 struct nlattr
**a
= info
->attrs
;
1301 struct ovs_header
*ovs_header
= info
->userhdr
;
1302 struct net
*net
= sock_net(skb
->sk
);
1303 struct sw_flow_key key
;
1304 struct sk_buff
*reply
;
1305 struct sw_flow
*flow
= NULL
;
1306 struct datapath
*dp
;
1307 struct sw_flow_match match
;
1308 struct sw_flow_id ufid
;
1309 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1311 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1314 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1315 if (a
[OVS_FLOW_ATTR_KEY
]) {
1316 ovs_match_init(&match
, &key
, true, NULL
);
1317 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1324 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1325 if (unlikely(!dp
)) {
1330 if (unlikely(!a
[OVS_FLOW_ATTR_KEY
] && !ufid_present
)) {
1331 err
= ovs_flow_tbl_flush(&dp
->table
);
1336 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1338 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1339 if (unlikely(!flow
)) {
1344 ovs_flow_tbl_remove(&dp
->table
, flow
);
1347 reply
= ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force
*) flow
->sf_acts
,
1348 &flow
->id
, info
, false, ufid_flags
);
1349 if (likely(reply
)) {
1350 if (likely(!IS_ERR(reply
))) {
1351 rcu_read_lock(); /*To keep RCU checker happy. */
1352 err
= ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
,
1353 reply
, info
->snd_portid
,
1360 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1362 netlink_set_err(sock_net(skb
->sk
)->genl_sock
, 0, 0, PTR_ERR(reply
));
1366 ovs_flow_free(flow
, true);
1373 static int ovs_flow_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1375 struct nlattr
*a
[__OVS_FLOW_ATTR_MAX
];
1376 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1377 struct table_instance
*ti
;
1378 struct datapath
*dp
;
1382 err
= genlmsg_parse_deprecated(cb
->nlh
, &dp_flow_genl_family
, a
,
1383 OVS_FLOW_ATTR_MAX
, flow_policy
, NULL
);
1386 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1389 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1395 ti
= rcu_dereference(dp
->table
.ti
);
1397 struct sw_flow
*flow
;
1400 bucket
= cb
->args
[0];
1402 flow
= ovs_flow_tbl_dump_next(ti
, &bucket
, &obj
);
1406 if (ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
, skb
,
1407 NETLINK_CB(cb
->skb
).portid
,
1408 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1409 OVS_FLOW_CMD_GET
, ufid_flags
) < 0)
1412 cb
->args
[0] = bucket
;
1419 static const struct nla_policy flow_policy
[OVS_FLOW_ATTR_MAX
+ 1] = {
1420 [OVS_FLOW_ATTR_KEY
] = { .type
= NLA_NESTED
},
1421 [OVS_FLOW_ATTR_MASK
] = { .type
= NLA_NESTED
},
1422 [OVS_FLOW_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
1423 [OVS_FLOW_ATTR_CLEAR
] = { .type
= NLA_FLAG
},
1424 [OVS_FLOW_ATTR_PROBE
] = { .type
= NLA_FLAG
},
1425 [OVS_FLOW_ATTR_UFID
] = { .type
= NLA_UNSPEC
, .len
= 1 },
1426 [OVS_FLOW_ATTR_UFID_FLAGS
] = { .type
= NLA_U32
},
1429 static const struct genl_ops dp_flow_genl_ops
[] = {
1430 { .cmd
= OVS_FLOW_CMD_NEW
,
1431 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1432 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1433 .doit
= ovs_flow_cmd_new
1435 { .cmd
= OVS_FLOW_CMD_DEL
,
1436 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1437 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1438 .doit
= ovs_flow_cmd_del
1440 { .cmd
= OVS_FLOW_CMD_GET
,
1441 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1442 .flags
= 0, /* OK for unprivileged users. */
1443 .doit
= ovs_flow_cmd_get
,
1444 .dumpit
= ovs_flow_cmd_dump
1446 { .cmd
= OVS_FLOW_CMD_SET
,
1447 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1448 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1449 .doit
= ovs_flow_cmd_set
,
1453 static struct genl_family dp_flow_genl_family __ro_after_init
= {
1454 .hdrsize
= sizeof(struct ovs_header
),
1455 .name
= OVS_FLOW_FAMILY
,
1456 .version
= OVS_FLOW_VERSION
,
1457 .maxattr
= OVS_FLOW_ATTR_MAX
,
1458 .policy
= flow_policy
,
1460 .parallel_ops
= true,
1461 .ops
= dp_flow_genl_ops
,
1462 .n_ops
= ARRAY_SIZE(dp_flow_genl_ops
),
1463 .mcgrps
= &ovs_dp_flow_multicast_group
,
1465 .module
= THIS_MODULE
,
1468 static size_t ovs_dp_cmd_msg_size(void)
1470 size_t msgsize
= NLMSG_ALIGN(sizeof(struct ovs_header
));
1472 msgsize
+= nla_total_size(IFNAMSIZ
);
1473 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_stats
));
1474 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats
));
1475 msgsize
+= nla_total_size(sizeof(u32
)); /* OVS_DP_ATTR_USER_FEATURES */
1480 /* Called with ovs_mutex. */
1481 static int ovs_dp_cmd_fill_info(struct datapath
*dp
, struct sk_buff
*skb
,
1482 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1484 struct ovs_header
*ovs_header
;
1485 struct ovs_dp_stats dp_stats
;
1486 struct ovs_dp_megaflow_stats dp_megaflow_stats
;
1489 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_datapath_genl_family
,
1494 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
1496 err
= nla_put_string(skb
, OVS_DP_ATTR_NAME
, ovs_dp_name(dp
));
1498 goto nla_put_failure
;
1500 get_dp_stats(dp
, &dp_stats
, &dp_megaflow_stats
);
1501 if (nla_put_64bit(skb
, OVS_DP_ATTR_STATS
, sizeof(struct ovs_dp_stats
),
1502 &dp_stats
, OVS_DP_ATTR_PAD
))
1503 goto nla_put_failure
;
1505 if (nla_put_64bit(skb
, OVS_DP_ATTR_MEGAFLOW_STATS
,
1506 sizeof(struct ovs_dp_megaflow_stats
),
1507 &dp_megaflow_stats
, OVS_DP_ATTR_PAD
))
1508 goto nla_put_failure
;
1510 if (nla_put_u32(skb
, OVS_DP_ATTR_USER_FEATURES
, dp
->user_features
))
1511 goto nla_put_failure
;
1513 genlmsg_end(skb
, ovs_header
);
1517 genlmsg_cancel(skb
, ovs_header
);
1522 static struct sk_buff
*ovs_dp_cmd_alloc_info(void)
1524 return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL
);
1527 /* Called with rcu_read_lock or ovs_mutex. */
1528 static struct datapath
*lookup_datapath(struct net
*net
,
1529 const struct ovs_header
*ovs_header
,
1530 struct nlattr
*a
[OVS_DP_ATTR_MAX
+ 1])
1532 struct datapath
*dp
;
1534 if (!a
[OVS_DP_ATTR_NAME
])
1535 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1537 struct vport
*vport
;
1539 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_DP_ATTR_NAME
]));
1540 dp
= vport
&& vport
->port_no
== OVSP_LOCAL
? vport
->dp
: NULL
;
1542 return dp
? dp
: ERR_PTR(-ENODEV
);
1545 static void ovs_dp_reset_user_features(struct sk_buff
*skb
, struct genl_info
*info
)
1547 struct datapath
*dp
;
1549 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1553 WARN(dp
->user_features
, "Dropping previously announced user features\n");
1554 dp
->user_features
= 0;
1557 static void ovs_dp_change(struct datapath
*dp
, struct nlattr
*a
[])
1559 if (a
[OVS_DP_ATTR_USER_FEATURES
])
1560 dp
->user_features
= nla_get_u32(a
[OVS_DP_ATTR_USER_FEATURES
]);
1563 static int ovs_dp_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1565 struct nlattr
**a
= info
->attrs
;
1566 struct vport_parms parms
;
1567 struct sk_buff
*reply
;
1568 struct datapath
*dp
;
1569 struct vport
*vport
;
1570 struct ovs_net
*ovs_net
;
1574 if (!a
[OVS_DP_ATTR_NAME
] || !a
[OVS_DP_ATTR_UPCALL_PID
])
1577 reply
= ovs_dp_cmd_alloc_info();
1582 dp
= kzalloc(sizeof(*dp
), GFP_KERNEL
);
1584 goto err_free_reply
;
1586 ovs_dp_set_net(dp
, sock_net(skb
->sk
));
1588 /* Allocate table. */
1589 err
= ovs_flow_tbl_init(&dp
->table
);
1593 dp
->stats_percpu
= netdev_alloc_pcpu_stats(struct dp_stats_percpu
);
1594 if (!dp
->stats_percpu
) {
1596 goto err_destroy_table
;
1599 dp
->ports
= kmalloc_array(DP_VPORT_HASH_BUCKETS
,
1600 sizeof(struct hlist_head
),
1604 goto err_destroy_percpu
;
1607 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1608 INIT_HLIST_HEAD(&dp
->ports
[i
]);
1610 err
= ovs_meters_init(dp
);
1612 goto err_destroy_ports_array
;
1614 /* Set up our datapath device. */
1615 parms
.name
= nla_data(a
[OVS_DP_ATTR_NAME
]);
1616 parms
.type
= OVS_VPORT_TYPE_INTERNAL
;
1617 parms
.options
= NULL
;
1619 parms
.port_no
= OVSP_LOCAL
;
1620 parms
.upcall_portids
= a
[OVS_DP_ATTR_UPCALL_PID
];
1622 ovs_dp_change(dp
, a
);
1624 /* So far only local changes have been made, now need the lock. */
1627 vport
= new_vport(&parms
);
1628 if (IS_ERR(vport
)) {
1629 err
= PTR_ERR(vport
);
1633 if (err
== -EEXIST
) {
1634 /* An outdated user space instance that does not understand
1635 * the concept of user_features has attempted to create a new
1636 * datapath and is likely to reuse it. Drop all user features.
1638 if (info
->genlhdr
->version
< OVS_DP_VER_FEATURES
)
1639 ovs_dp_reset_user_features(skb
, info
);
1642 goto err_destroy_meters
;
1645 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1646 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1649 ovs_net
= net_generic(ovs_dp_get_net(dp
), ovs_net_id
);
1650 list_add_tail_rcu(&dp
->list_node
, &ovs_net
->dps
);
1654 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1659 ovs_meters_exit(dp
);
1660 err_destroy_ports_array
:
1663 free_percpu(dp
->stats_percpu
);
1665 ovs_flow_tbl_destroy(&dp
->table
);
1674 /* Called with ovs_mutex. */
1675 static void __dp_destroy(struct datapath
*dp
)
1679 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1680 struct vport
*vport
;
1681 struct hlist_node
*n
;
1683 hlist_for_each_entry_safe(vport
, n
, &dp
->ports
[i
], dp_hash_node
)
1684 if (vport
->port_no
!= OVSP_LOCAL
)
1685 ovs_dp_detach_port(vport
);
1688 list_del_rcu(&dp
->list_node
);
1690 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1691 * all ports in datapath are destroyed first before freeing datapath.
1693 ovs_dp_detach_port(ovs_vport_ovsl(dp
, OVSP_LOCAL
));
1695 /* RCU destroy the flow table */
1696 call_rcu(&dp
->rcu
, destroy_dp_rcu
);
1699 static int ovs_dp_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1701 struct sk_buff
*reply
;
1702 struct datapath
*dp
;
1705 reply
= ovs_dp_cmd_alloc_info();
1710 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1713 goto err_unlock_free
;
1715 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1716 info
->snd_seq
, 0, OVS_DP_CMD_DEL
);
1722 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1732 static int ovs_dp_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1734 struct sk_buff
*reply
;
1735 struct datapath
*dp
;
1738 reply
= ovs_dp_cmd_alloc_info();
1743 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1746 goto err_unlock_free
;
1748 ovs_dp_change(dp
, info
->attrs
);
1750 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1751 info
->snd_seq
, 0, OVS_DP_CMD_SET
);
1755 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1765 static int ovs_dp_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1767 struct sk_buff
*reply
;
1768 struct datapath
*dp
;
1771 reply
= ovs_dp_cmd_alloc_info();
1776 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1779 goto err_unlock_free
;
1781 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1782 info
->snd_seq
, 0, OVS_DP_CMD_GET
);
1786 return genlmsg_reply(reply
, info
);
1794 static int ovs_dp_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1796 struct ovs_net
*ovs_net
= net_generic(sock_net(skb
->sk
), ovs_net_id
);
1797 struct datapath
*dp
;
1798 int skip
= cb
->args
[0];
1802 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
1804 ovs_dp_cmd_fill_info(dp
, skb
, NETLINK_CB(cb
->skb
).portid
,
1805 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1806 OVS_DP_CMD_GET
) < 0)
1817 static const struct nla_policy datapath_policy
[OVS_DP_ATTR_MAX
+ 1] = {
1818 [OVS_DP_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1819 [OVS_DP_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1820 [OVS_DP_ATTR_USER_FEATURES
] = { .type
= NLA_U32
},
1823 static const struct genl_ops dp_datapath_genl_ops
[] = {
1824 { .cmd
= OVS_DP_CMD_NEW
,
1825 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1826 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1827 .doit
= ovs_dp_cmd_new
1829 { .cmd
= OVS_DP_CMD_DEL
,
1830 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1831 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1832 .doit
= ovs_dp_cmd_del
1834 { .cmd
= OVS_DP_CMD_GET
,
1835 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1836 .flags
= 0, /* OK for unprivileged users. */
1837 .doit
= ovs_dp_cmd_get
,
1838 .dumpit
= ovs_dp_cmd_dump
1840 { .cmd
= OVS_DP_CMD_SET
,
1841 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1842 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1843 .doit
= ovs_dp_cmd_set
,
1847 static struct genl_family dp_datapath_genl_family __ro_after_init
= {
1848 .hdrsize
= sizeof(struct ovs_header
),
1849 .name
= OVS_DATAPATH_FAMILY
,
1850 .version
= OVS_DATAPATH_VERSION
,
1851 .maxattr
= OVS_DP_ATTR_MAX
,
1852 .policy
= datapath_policy
,
1854 .parallel_ops
= true,
1855 .ops
= dp_datapath_genl_ops
,
1856 .n_ops
= ARRAY_SIZE(dp_datapath_genl_ops
),
1857 .mcgrps
= &ovs_dp_datapath_multicast_group
,
1859 .module
= THIS_MODULE
,
1862 /* Called with ovs_mutex or RCU read lock. */
1863 static int ovs_vport_cmd_fill_info(struct vport
*vport
, struct sk_buff
*skb
,
1864 struct net
*net
, u32 portid
, u32 seq
,
1867 struct ovs_header
*ovs_header
;
1868 struct ovs_vport_stats vport_stats
;
1871 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_vport_genl_family
,
1876 ovs_header
->dp_ifindex
= get_dpifindex(vport
->dp
);
1878 if (nla_put_u32(skb
, OVS_VPORT_ATTR_PORT_NO
, vport
->port_no
) ||
1879 nla_put_u32(skb
, OVS_VPORT_ATTR_TYPE
, vport
->ops
->type
) ||
1880 nla_put_string(skb
, OVS_VPORT_ATTR_NAME
,
1881 ovs_vport_name(vport
)) ||
1882 nla_put_u32(skb
, OVS_VPORT_ATTR_IFINDEX
, vport
->dev
->ifindex
))
1883 goto nla_put_failure
;
1885 if (!net_eq(net
, dev_net(vport
->dev
))) {
1886 int id
= peernet2id_alloc(net
, dev_net(vport
->dev
));
1888 if (nla_put_s32(skb
, OVS_VPORT_ATTR_NETNSID
, id
))
1889 goto nla_put_failure
;
1892 ovs_vport_get_stats(vport
, &vport_stats
);
1893 if (nla_put_64bit(skb
, OVS_VPORT_ATTR_STATS
,
1894 sizeof(struct ovs_vport_stats
), &vport_stats
,
1895 OVS_VPORT_ATTR_PAD
))
1896 goto nla_put_failure
;
1898 if (ovs_vport_get_upcall_portids(vport
, skb
))
1899 goto nla_put_failure
;
1901 err
= ovs_vport_get_options(vport
, skb
);
1902 if (err
== -EMSGSIZE
)
1905 genlmsg_end(skb
, ovs_header
);
1911 genlmsg_cancel(skb
, ovs_header
);
1915 static struct sk_buff
*ovs_vport_cmd_alloc_info(void)
1917 return nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1920 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1921 struct sk_buff
*ovs_vport_cmd_build_info(struct vport
*vport
, struct net
*net
,
1922 u32 portid
, u32 seq
, u8 cmd
)
1924 struct sk_buff
*skb
;
1927 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
1929 return ERR_PTR(-ENOMEM
);
1931 retval
= ovs_vport_cmd_fill_info(vport
, skb
, net
, portid
, seq
, 0, cmd
);
1937 /* Called with ovs_mutex or RCU read lock. */
1938 static struct vport
*lookup_vport(struct net
*net
,
1939 const struct ovs_header
*ovs_header
,
1940 struct nlattr
*a
[OVS_VPORT_ATTR_MAX
+ 1])
1942 struct datapath
*dp
;
1943 struct vport
*vport
;
1945 if (a
[OVS_VPORT_ATTR_IFINDEX
])
1946 return ERR_PTR(-EOPNOTSUPP
);
1947 if (a
[OVS_VPORT_ATTR_NAME
]) {
1948 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_VPORT_ATTR_NAME
]));
1950 return ERR_PTR(-ENODEV
);
1951 if (ovs_header
->dp_ifindex
&&
1952 ovs_header
->dp_ifindex
!= get_dpifindex(vport
->dp
))
1953 return ERR_PTR(-ENODEV
);
1955 } else if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
1956 u32 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1958 if (port_no
>= DP_MAX_PORTS
)
1959 return ERR_PTR(-EFBIG
);
1961 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1963 return ERR_PTR(-ENODEV
);
1965 vport
= ovs_vport_ovsl_rcu(dp
, port_no
);
1967 return ERR_PTR(-ENODEV
);
1970 return ERR_PTR(-EINVAL
);
1974 /* Called with ovs_mutex */
1975 static void update_headroom(struct datapath
*dp
)
1977 unsigned dev_headroom
, max_headroom
= 0;
1978 struct net_device
*dev
;
1979 struct vport
*vport
;
1982 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1983 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
1985 dev_headroom
= netdev_get_fwd_headroom(dev
);
1986 if (dev_headroom
> max_headroom
)
1987 max_headroom
= dev_headroom
;
1991 dp
->max_headroom
= max_headroom
;
1992 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1993 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
)
1994 netdev_set_rx_headroom(vport
->dev
, max_headroom
);
1997 static int ovs_vport_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1999 struct nlattr
**a
= info
->attrs
;
2000 struct ovs_header
*ovs_header
= info
->userhdr
;
2001 struct vport_parms parms
;
2002 struct sk_buff
*reply
;
2003 struct vport
*vport
;
2004 struct datapath
*dp
;
2008 if (!a
[OVS_VPORT_ATTR_NAME
] || !a
[OVS_VPORT_ATTR_TYPE
] ||
2009 !a
[OVS_VPORT_ATTR_UPCALL_PID
])
2011 if (a
[OVS_VPORT_ATTR_IFINDEX
])
2014 port_no
= a
[OVS_VPORT_ATTR_PORT_NO
]
2015 ? nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]) : 0;
2016 if (port_no
>= DP_MAX_PORTS
)
2019 reply
= ovs_vport_cmd_alloc_info();
2025 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2028 goto exit_unlock_free
;
2031 vport
= ovs_vport_ovsl(dp
, port_no
);
2034 goto exit_unlock_free
;
2036 for (port_no
= 1; ; port_no
++) {
2037 if (port_no
>= DP_MAX_PORTS
) {
2039 goto exit_unlock_free
;
2041 vport
= ovs_vport_ovsl(dp
, port_no
);
2047 parms
.name
= nla_data(a
[OVS_VPORT_ATTR_NAME
]);
2048 parms
.type
= nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]);
2049 parms
.options
= a
[OVS_VPORT_ATTR_OPTIONS
];
2051 parms
.port_no
= port_no
;
2052 parms
.upcall_portids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2054 vport
= new_vport(&parms
);
2055 err
= PTR_ERR(vport
);
2056 if (IS_ERR(vport
)) {
2059 goto exit_unlock_free
;
2062 err
= ovs_vport_cmd_fill_info(vport
, reply
, genl_info_net(info
),
2063 info
->snd_portid
, info
->snd_seq
, 0,
2066 if (netdev_get_fwd_headroom(vport
->dev
) > dp
->max_headroom
)
2067 update_headroom(dp
);
2069 netdev_set_rx_headroom(vport
->dev
, dp
->max_headroom
);
2074 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2083 static int ovs_vport_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
2085 struct nlattr
**a
= info
->attrs
;
2086 struct sk_buff
*reply
;
2087 struct vport
*vport
;
2090 reply
= ovs_vport_cmd_alloc_info();
2095 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2096 err
= PTR_ERR(vport
);
2098 goto exit_unlock_free
;
2100 if (a
[OVS_VPORT_ATTR_TYPE
] &&
2101 nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]) != vport
->ops
->type
) {
2103 goto exit_unlock_free
;
2106 if (a
[OVS_VPORT_ATTR_OPTIONS
]) {
2107 err
= ovs_vport_set_options(vport
, a
[OVS_VPORT_ATTR_OPTIONS
]);
2109 goto exit_unlock_free
;
2113 if (a
[OVS_VPORT_ATTR_UPCALL_PID
]) {
2114 struct nlattr
*ids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2116 err
= ovs_vport_set_upcall_portids(vport
, ids
);
2118 goto exit_unlock_free
;
2121 err
= ovs_vport_cmd_fill_info(vport
, reply
, genl_info_net(info
),
2122 info
->snd_portid
, info
->snd_seq
, 0,
2127 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2136 static int ovs_vport_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
2138 bool must_update_headroom
= false;
2139 struct nlattr
**a
= info
->attrs
;
2140 struct sk_buff
*reply
;
2141 struct datapath
*dp
;
2142 struct vport
*vport
;
2145 reply
= ovs_vport_cmd_alloc_info();
2150 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2151 err
= PTR_ERR(vport
);
2153 goto exit_unlock_free
;
2155 if (vport
->port_no
== OVSP_LOCAL
) {
2157 goto exit_unlock_free
;
2160 err
= ovs_vport_cmd_fill_info(vport
, reply
, genl_info_net(info
),
2161 info
->snd_portid
, info
->snd_seq
, 0,
2165 /* the vport deletion may trigger dp headroom update */
2167 if (netdev_get_fwd_headroom(vport
->dev
) == dp
->max_headroom
)
2168 must_update_headroom
= true;
2169 netdev_reset_rx_headroom(vport
->dev
);
2170 ovs_dp_detach_port(vport
);
2172 if (must_update_headroom
)
2173 update_headroom(dp
);
2176 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2185 static int ovs_vport_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
2187 struct nlattr
**a
= info
->attrs
;
2188 struct ovs_header
*ovs_header
= info
->userhdr
;
2189 struct sk_buff
*reply
;
2190 struct vport
*vport
;
2193 reply
= ovs_vport_cmd_alloc_info();
2198 vport
= lookup_vport(sock_net(skb
->sk
), ovs_header
, a
);
2199 err
= PTR_ERR(vport
);
2201 goto exit_unlock_free
;
2202 err
= ovs_vport_cmd_fill_info(vport
, reply
, genl_info_net(info
),
2203 info
->snd_portid
, info
->snd_seq
, 0,
2208 return genlmsg_reply(reply
, info
);
2216 static int ovs_vport_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2218 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
2219 struct datapath
*dp
;
2220 int bucket
= cb
->args
[0], skip
= cb
->args
[1];
2224 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2229 for (i
= bucket
; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2230 struct vport
*vport
;
2233 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
2235 ovs_vport_cmd_fill_info(vport
, skb
,
2237 NETLINK_CB(cb
->skb
).portid
,
2240 OVS_VPORT_CMD_GET
) < 0)
2256 static const struct nla_policy vport_policy
[OVS_VPORT_ATTR_MAX
+ 1] = {
2257 [OVS_VPORT_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
2258 [OVS_VPORT_ATTR_STATS
] = { .len
= sizeof(struct ovs_vport_stats
) },
2259 [OVS_VPORT_ATTR_PORT_NO
] = { .type
= NLA_U32
},
2260 [OVS_VPORT_ATTR_TYPE
] = { .type
= NLA_U32
},
2261 [OVS_VPORT_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
2262 [OVS_VPORT_ATTR_OPTIONS
] = { .type
= NLA_NESTED
},
2263 [OVS_VPORT_ATTR_IFINDEX
] = { .type
= NLA_U32
},
2264 [OVS_VPORT_ATTR_NETNSID
] = { .type
= NLA_S32
},
2267 static const struct genl_ops dp_vport_genl_ops
[] = {
2268 { .cmd
= OVS_VPORT_CMD_NEW
,
2269 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2270 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2271 .doit
= ovs_vport_cmd_new
2273 { .cmd
= OVS_VPORT_CMD_DEL
,
2274 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2275 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2276 .doit
= ovs_vport_cmd_del
2278 { .cmd
= OVS_VPORT_CMD_GET
,
2279 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2280 .flags
= 0, /* OK for unprivileged users. */
2281 .doit
= ovs_vport_cmd_get
,
2282 .dumpit
= ovs_vport_cmd_dump
2284 { .cmd
= OVS_VPORT_CMD_SET
,
2285 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2286 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2287 .doit
= ovs_vport_cmd_set
,
2291 struct genl_family dp_vport_genl_family __ro_after_init
= {
2292 .hdrsize
= sizeof(struct ovs_header
),
2293 .name
= OVS_VPORT_FAMILY
,
2294 .version
= OVS_VPORT_VERSION
,
2295 .maxattr
= OVS_VPORT_ATTR_MAX
,
2296 .policy
= vport_policy
,
2298 .parallel_ops
= true,
2299 .ops
= dp_vport_genl_ops
,
2300 .n_ops
= ARRAY_SIZE(dp_vport_genl_ops
),
2301 .mcgrps
= &ovs_dp_vport_multicast_group
,
2303 .module
= THIS_MODULE
,
2306 static struct genl_family
* const dp_genl_families
[] = {
2307 &dp_datapath_genl_family
,
2308 &dp_vport_genl_family
,
2309 &dp_flow_genl_family
,
2310 &dp_packet_genl_family
,
2311 &dp_meter_genl_family
,
2312 #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT)
2313 &dp_ct_limit_genl_family
,
2317 static void dp_unregister_genl(int n_families
)
2321 for (i
= 0; i
< n_families
; i
++)
2322 genl_unregister_family(dp_genl_families
[i
]);
2325 static int __init
dp_register_genl(void)
2330 for (i
= 0; i
< ARRAY_SIZE(dp_genl_families
); i
++) {
2332 err
= genl_register_family(dp_genl_families
[i
]);
2340 dp_unregister_genl(i
);
2344 static int __net_init
ovs_init_net(struct net
*net
)
2346 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2348 INIT_LIST_HEAD(&ovs_net
->dps
);
2349 INIT_WORK(&ovs_net
->dp_notify_work
, ovs_dp_notify_wq
);
2350 return ovs_ct_init(net
);
2353 static void __net_exit
list_vports_from_net(struct net
*net
, struct net
*dnet
,
2354 struct list_head
*head
)
2356 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2357 struct datapath
*dp
;
2359 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
2362 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2363 struct vport
*vport
;
2365 hlist_for_each_entry(vport
, &dp
->ports
[i
], dp_hash_node
) {
2366 if (vport
->ops
->type
!= OVS_VPORT_TYPE_INTERNAL
)
2369 if (dev_net(vport
->dev
) == dnet
)
2370 list_add(&vport
->detach_list
, head
);
2376 static void __net_exit
ovs_exit_net(struct net
*dnet
)
2378 struct datapath
*dp
, *dp_next
;
2379 struct ovs_net
*ovs_net
= net_generic(dnet
, ovs_net_id
);
2380 struct vport
*vport
, *vport_next
;
2386 list_for_each_entry_safe(dp
, dp_next
, &ovs_net
->dps
, list_node
)
2389 down_read(&net_rwsem
);
2391 list_vports_from_net(net
, dnet
, &head
);
2392 up_read(&net_rwsem
);
2394 /* Detach all vports from given namespace. */
2395 list_for_each_entry_safe(vport
, vport_next
, &head
, detach_list
) {
2396 list_del(&vport
->detach_list
);
2397 ovs_dp_detach_port(vport
);
2402 cancel_work_sync(&ovs_net
->dp_notify_work
);
2405 static struct pernet_operations ovs_net_ops
= {
2406 .init
= ovs_init_net
,
2407 .exit
= ovs_exit_net
,
2409 .size
= sizeof(struct ovs_net
),
2412 static int __init
dp_init(void)
2416 BUILD_BUG_ON(sizeof(struct ovs_skb_cb
) > FIELD_SIZEOF(struct sk_buff
, cb
));
2418 pr_info("Open vSwitch switching datapath\n");
2420 err
= action_fifos_init();
2424 err
= ovs_internal_dev_rtnl_link_register();
2426 goto error_action_fifos_exit
;
2428 err
= ovs_flow_init();
2430 goto error_unreg_rtnl_link
;
2432 err
= ovs_vport_init();
2434 goto error_flow_exit
;
2436 err
= register_pernet_device(&ovs_net_ops
);
2438 goto error_vport_exit
;
2440 err
= register_netdevice_notifier(&ovs_dp_device_notifier
);
2442 goto error_netns_exit
;
2444 err
= ovs_netdev_init();
2446 goto error_unreg_notifier
;
2448 err
= dp_register_genl();
2450 goto error_unreg_netdev
;
2456 error_unreg_notifier
:
2457 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2459 unregister_pernet_device(&ovs_net_ops
);
2464 error_unreg_rtnl_link
:
2465 ovs_internal_dev_rtnl_link_unregister();
2466 error_action_fifos_exit
:
2467 action_fifos_exit();
2472 static void dp_cleanup(void)
2474 dp_unregister_genl(ARRAY_SIZE(dp_genl_families
));
2476 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2477 unregister_pernet_device(&ovs_net_ops
);
2481 ovs_internal_dev_rtnl_link_unregister();
2482 action_fifos_exit();
2485 module_init(dp_init
);
2486 module_exit(dp_cleanup
);
2488 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2489 MODULE_LICENSE("GPL");
2490 MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY
);
2491 MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY
);
2492 MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY
);
2493 MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY
);
2494 MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY
);
2495 MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY
);