2 * Copyright (c) 2007-2015 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/version.h>
40 #include <linux/ethtool.h>
41 #include <linux/wait.h>
42 #include <asm/div64.h>
43 #include <linux/highmem.h>
44 #include <linux/netfilter_bridge.h>
45 #include <linux/netfilter_ipv4.h>
46 #include <linux/inetdevice.h>
47 #include <linux/list.h>
48 #include <linux/openvswitch.h>
49 #include <linux/rculist.h>
50 #include <linux/dmi.h>
51 #include <net/genetlink.h>
52 #include <net/net_namespace.h>
53 #include <net/netns/generic.h>
56 #include "conntrack.h"
58 #include "flow_table.h"
59 #include "flow_netlink.h"
61 #include "vport-internal_dev.h"
62 #include "vport-netdev.h"
64 int ovs_net_id __read_mostly
;
65 EXPORT_SYMBOL_GPL(ovs_net_id
);
67 static struct genl_family dp_packet_genl_family
;
68 static struct genl_family dp_flow_genl_family
;
69 static struct genl_family dp_datapath_genl_family
;
71 static const struct nla_policy flow_policy
[];
73 static struct genl_multicast_group ovs_dp_flow_multicast_group
= {
74 .name
= OVS_FLOW_MCGROUP
77 static struct genl_multicast_group ovs_dp_datapath_multicast_group
= {
78 .name
= OVS_DATAPATH_MCGROUP
81 struct genl_multicast_group ovs_dp_vport_multicast_group
= {
82 .name
= OVS_VPORT_MCGROUP
85 /* Check if need to build a reply message.
86 * OVS userspace sets the NLM_F_ECHO flag if it needs the reply.
88 static bool ovs_must_notify(struct genl_family
*family
, struct genl_info
*info
,
91 return info
->nlhdr
->nlmsg_flags
& NLM_F_ECHO
||
92 genl_has_listeners(family
, genl_info_net(info
), group
);
95 static void ovs_notify(struct genl_family
*family
, struct genl_multicast_group
*grp
,
96 struct sk_buff
*skb
, struct genl_info
*info
)
98 genl_notify(family
, skb
, info
, GROUP_ID(grp
), GFP_KERNEL
);
104 * All writes e.g. Writes to device state (add/remove datapath, port, set
105 * operations on vports, etc.), Writes to other state (flow table
106 * modifications, set miscellaneous datapath parameters, etc.) are protected
109 * Reads are protected by RCU.
111 * There are a few special cases (mostly stats) that have their own
112 * synchronization but they nest under all of above and don't interact with
115 * The RTNL lock nests inside ovs_mutex.
118 static DEFINE_MUTEX(ovs_mutex
);
122 mutex_lock(&ovs_mutex
);
125 void ovs_unlock(void)
127 mutex_unlock(&ovs_mutex
);
130 #ifdef CONFIG_LOCKDEP
131 int lockdep_ovsl_is_held(void)
134 return lockdep_is_held(&ovs_mutex
);
138 EXPORT_SYMBOL_GPL(lockdep_ovsl_is_held
);
141 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*,
142 const struct sw_flow_key
*,
143 const struct dp_upcall_info
*,
145 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*,
146 const struct sw_flow_key
*,
147 const struct dp_upcall_info
*,
150 /* Must be called with rcu_read_lock. */
151 static struct datapath
*get_dp_rcu(struct net
*net
, int dp_ifindex
)
153 struct net_device
*dev
= dev_get_by_index_rcu(net
, dp_ifindex
);
156 struct vport
*vport
= ovs_internal_dev_get_vport(dev
);
164 /* The caller must hold either ovs_mutex or rcu_read_lock to keep the
165 * returned dp pointer valid.
167 static inline struct datapath
*get_dp(struct net
*net
, int dp_ifindex
)
171 WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
173 dp
= get_dp_rcu(net
, dp_ifindex
);
179 /* Must be called with rcu_read_lock or ovs_mutex. */
180 const char *ovs_dp_name(const struct datapath
*dp
)
182 struct vport
*vport
= ovs_vport_ovsl_rcu(dp
, OVSP_LOCAL
);
183 return ovs_vport_name(vport
);
186 static int get_dpifindex(const struct datapath
*dp
)
193 local
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
195 ifindex
= local
->dev
->ifindex
;
204 static void destroy_dp_rcu(struct rcu_head
*rcu
)
206 struct datapath
*dp
= container_of(rcu
, struct datapath
, rcu
);
208 ovs_flow_tbl_destroy(&dp
->table
);
209 free_percpu(dp
->stats_percpu
);
214 static struct hlist_head
*vport_hash_bucket(const struct datapath
*dp
,
217 return &dp
->ports
[port_no
& (DP_VPORT_HASH_BUCKETS
- 1)];
220 /* Called with ovs_mutex or RCU read lock. */
221 struct vport
*ovs_lookup_vport(const struct datapath
*dp
, u16 port_no
)
224 struct hlist_head
*head
;
226 head
= vport_hash_bucket(dp
, port_no
);
227 hlist_for_each_entry_rcu(vport
, head
, dp_hash_node
) {
228 if (vport
->port_no
== port_no
)
234 /* Called with ovs_mutex. */
235 static struct vport
*new_vport(const struct vport_parms
*parms
)
239 vport
= ovs_vport_add(parms
);
240 if (!IS_ERR(vport
)) {
241 struct datapath
*dp
= parms
->dp
;
242 struct hlist_head
*head
= vport_hash_bucket(dp
, vport
->port_no
);
244 hlist_add_head_rcu(&vport
->dp_hash_node
, head
);
249 void ovs_dp_detach_port(struct vport
*p
)
253 /* First drop references to device. */
254 hlist_del_rcu(&p
->dp_hash_node
);
256 /* Then destroy it. */
260 /* Must be called with rcu_read_lock. */
261 void ovs_dp_process_packet(struct sk_buff
*skb
, struct sw_flow_key
*key
)
263 const struct vport
*p
= OVS_CB(skb
)->input_vport
;
264 struct datapath
*dp
= p
->dp
;
265 struct sw_flow
*flow
;
266 struct sw_flow_actions
*sf_acts
;
267 struct dp_stats_percpu
*stats
;
271 stats
= this_cpu_ptr(dp
->stats_percpu
);
274 flow
= ovs_flow_tbl_lookup_stats(&dp
->table
, key
, skb_get_hash(skb
),
276 if (unlikely(!flow
)) {
277 struct dp_upcall_info upcall
;
280 memset(&upcall
, 0, sizeof(upcall
));
281 upcall
.cmd
= OVS_PACKET_CMD_MISS
;
282 upcall
.portid
= ovs_vport_find_upcall_portid(p
, skb
);
283 upcall
.mru
= OVS_CB(skb
)->mru
;
284 error
= ovs_dp_upcall(dp
, skb
, key
, &upcall
, 0);
289 stats_counter
= &stats
->n_missed
;
293 ovs_flow_stats_update(flow
, key
->tp
.flags
, skb
);
294 sf_acts
= rcu_dereference(flow
->sf_acts
);
295 ovs_execute_actions(dp
, skb
, sf_acts
, key
);
297 stats_counter
= &stats
->n_hit
;
300 /* Update datapath statistics. */
301 u64_stats_update_begin(&stats
->syncp
);
303 stats
->n_mask_hit
+= n_mask_hit
;
304 u64_stats_update_end(&stats
->syncp
);
307 int ovs_dp_upcall(struct datapath
*dp
, struct sk_buff
*skb
,
308 const struct sw_flow_key
*key
,
309 const struct dp_upcall_info
*upcall_info
,
312 struct dp_stats_percpu
*stats
;
315 if (upcall_info
->portid
== 0) {
320 if (!skb_is_gso(skb
))
321 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
323 err
= queue_gso_packets(dp
, skb
, key
, upcall_info
, cutlen
);
330 stats
= this_cpu_ptr(dp
->stats_percpu
);
332 u64_stats_update_begin(&stats
->syncp
);
334 u64_stats_update_end(&stats
->syncp
);
339 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*skb
,
340 const struct sw_flow_key
*key
,
341 const struct dp_upcall_info
*upcall_info
,
344 unsigned short gso_type
= skb_shinfo(skb
)->gso_type
;
345 struct sw_flow_key later_key
;
346 struct sk_buff
*segs
, *nskb
;
347 struct ovs_skb_cb ovs_cb
;
350 ovs_cb
= *OVS_CB(skb
);
351 segs
= __skb_gso_segment(skb
, NETIF_F_SG
, false);
352 *OVS_CB(skb
) = ovs_cb
;
354 return PTR_ERR(segs
);
358 if (gso_type
& SKB_GSO_UDP
) {
359 /* The initial flow key extracted by ovs_flow_key_extract()
360 * in this case is for a first fragment, so we need to
361 * properly mark later fragments.
364 later_key
.ip
.frag
= OVS_FRAG_TYPE_LATER
;
367 /* Queue all of the segments. */
370 *OVS_CB(skb
) = ovs_cb
;
371 if (gso_type
& SKB_GSO_UDP
&& skb
!= segs
)
374 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
378 } while ((skb
= skb
->next
));
380 /* Free all of the segments. */
388 } while ((skb
= nskb
));
392 static size_t upcall_msg_size(const struct dp_upcall_info
*upcall_info
,
395 size_t size
= NLMSG_ALIGN(sizeof(struct ovs_header
))
396 + nla_total_size(hdrlen
) /* OVS_PACKET_ATTR_PACKET */
397 + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */
398 + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */
400 /* OVS_PACKET_ATTR_USERDATA */
401 if (upcall_info
->userdata
)
402 size
+= NLA_ALIGN(upcall_info
->userdata
->nla_len
);
404 /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */
405 if (upcall_info
->egress_tun_info
)
406 size
+= nla_total_size(ovs_tun_key_attr_size());
408 /* OVS_PACKET_ATTR_ACTIONS */
409 if (upcall_info
->actions_len
)
410 size
+= nla_total_size(upcall_info
->actions_len
);
412 /* OVS_PACKET_ATTR_MRU */
413 if (upcall_info
->mru
)
414 size
+= nla_total_size(sizeof(upcall_info
->mru
));
419 static void pad_packet(struct datapath
*dp
, struct sk_buff
*skb
)
421 if (!(dp
->user_features
& OVS_DP_F_UNALIGNED
)) {
422 size_t plen
= NLA_ALIGN(skb
->len
) - skb
->len
;
425 memset(skb_put(skb
, plen
), 0, plen
);
429 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*skb
,
430 const struct sw_flow_key
*key
,
431 const struct dp_upcall_info
*upcall_info
,
434 struct ovs_header
*upcall
;
435 struct sk_buff
*nskb
= NULL
;
436 struct sk_buff
*user_skb
= NULL
; /* to be queued to userspace */
442 dp_ifindex
= get_dpifindex(dp
);
446 if (skb_vlan_tag_present(skb
)) {
447 nskb
= skb_clone(skb
, GFP_ATOMIC
);
451 nskb
= __vlan_hwaccel_push_inside(nskb
);
458 if (nla_attr_size(skb
->len
) > USHRT_MAX
) {
463 /* Complete checksum if needed */
464 if (skb
->ip_summed
== CHECKSUM_PARTIAL
&&
465 (err
= skb_checksum_help(skb
)))
468 /* Older versions of OVS user space enforce alignment of the last
469 * Netlink attribute to NLA_ALIGNTO which would require extensive
470 * padding logic. Only perform zerocopy if padding is not required.
472 if (dp
->user_features
& OVS_DP_F_UNALIGNED
)
473 hlen
= skb_zerocopy_headlen(skb
);
477 len
= upcall_msg_size(upcall_info
, hlen
- cutlen
);
478 user_skb
= genlmsg_new(len
, GFP_ATOMIC
);
484 upcall
= genlmsg_put(user_skb
, 0, 0, &dp_packet_genl_family
,
485 0, upcall_info
->cmd
);
486 upcall
->dp_ifindex
= dp_ifindex
;
488 err
= ovs_nla_put_key(key
, key
, OVS_PACKET_ATTR_KEY
, false, user_skb
);
491 if (upcall_info
->userdata
)
492 __nla_put(user_skb
, OVS_PACKET_ATTR_USERDATA
,
493 nla_len(upcall_info
->userdata
),
494 nla_data(upcall_info
->userdata
));
497 if (upcall_info
->egress_tun_info
) {
498 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_EGRESS_TUN_KEY
);
499 err
= ovs_nla_put_tunnel_info(user_skb
,
500 upcall_info
->egress_tun_info
);
502 nla_nest_end(user_skb
, nla
);
505 if (upcall_info
->actions_len
) {
506 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_ACTIONS
);
507 err
= ovs_nla_put_actions(upcall_info
->actions
,
508 upcall_info
->actions_len
,
511 nla_nest_end(user_skb
, nla
);
513 nla_nest_cancel(user_skb
, nla
);
516 /* Add OVS_PACKET_ATTR_MRU */
517 if (upcall_info
->mru
) {
518 if (nla_put_u16(user_skb
, OVS_PACKET_ATTR_MRU
,
523 pad_packet(dp
, user_skb
);
526 /* Add OVS_PACKET_ATTR_LEN when packet is truncated */
528 if (nla_put_u32(user_skb
, OVS_PACKET_ATTR_LEN
,
533 pad_packet(dp
, user_skb
);
536 /* Only reserve room for attribute header, packet data is added
539 if (!(nla
= nla_reserve(user_skb
, OVS_PACKET_ATTR_PACKET
, 0))) {
543 nla
->nla_len
= nla_attr_size(skb
->len
- cutlen
);
545 err
= skb_zerocopy(user_skb
, skb
, skb
->len
- cutlen
, hlen
);
549 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
550 pad_packet(dp
, user_skb
);
552 ((struct nlmsghdr
*) user_skb
->data
)->nlmsg_len
= user_skb
->len
;
554 err
= genlmsg_unicast(ovs_dp_get_net(dp
), user_skb
, upcall_info
->portid
);
564 static int ovs_packet_cmd_execute(struct sk_buff
*skb
, struct genl_info
*info
)
566 struct ovs_header
*ovs_header
= info
->userhdr
;
567 struct net
*net
= sock_net(skb
->sk
);
568 struct nlattr
**a
= info
->attrs
;
569 struct sw_flow_actions
*acts
;
570 struct sk_buff
*packet
;
571 struct sw_flow
*flow
;
572 struct sw_flow_actions
*sf_acts
;
575 struct vport
*input_vport
;
579 bool log
= !a
[OVS_PACKET_ATTR_PROBE
];
582 if (!a
[OVS_PACKET_ATTR_PACKET
] || !a
[OVS_PACKET_ATTR_KEY
] ||
583 !a
[OVS_PACKET_ATTR_ACTIONS
])
586 len
= nla_len(a
[OVS_PACKET_ATTR_PACKET
]);
587 packet
= __dev_alloc_skb(NET_IP_ALIGN
+ len
, GFP_KERNEL
);
591 skb_reserve(packet
, NET_IP_ALIGN
);
593 nla_memcpy(__skb_put(packet
, len
), a
[OVS_PACKET_ATTR_PACKET
], len
);
595 skb_reset_mac_header(packet
);
596 eth
= eth_hdr(packet
);
598 /* Normally, setting the skb 'protocol' field would be handled by a
599 * call to eth_type_trans(), but it assumes there's a sending
600 * device, which we may not have.
602 if (eth_proto_is_802_3(eth
->h_proto
))
603 packet
->protocol
= eth
->h_proto
;
605 packet
->protocol
= htons(ETH_P_802_2
);
607 /* Set packet's mru */
608 if (a
[OVS_PACKET_ATTR_MRU
]) {
609 mru
= nla_get_u16(a
[OVS_PACKET_ATTR_MRU
]);
610 packet
->ignore_df
= 1;
612 OVS_CB(packet
)->mru
= mru
;
614 /* Build an sw_flow for sending this packet. */
615 flow
= ovs_flow_alloc();
620 err
= ovs_flow_key_extract_userspace(net
, a
[OVS_PACKET_ATTR_KEY
],
621 packet
, &flow
->key
, log
);
625 err
= ovs_nla_copy_actions(net
, a
[OVS_PACKET_ATTR_ACTIONS
],
626 &flow
->key
, &acts
, log
);
630 rcu_assign_pointer(flow
->sf_acts
, acts
);
631 packet
->priority
= flow
->key
.phy
.priority
;
632 packet
->mark
= flow
->key
.phy
.skb_mark
;
635 dp
= get_dp_rcu(net
, ovs_header
->dp_ifindex
);
640 input_vport
= ovs_vport_rcu(dp
, flow
->key
.phy
.in_port
);
642 input_vport
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
647 packet
->dev
= input_vport
->dev
;
648 OVS_CB(packet
)->input_vport
= input_vport
;
649 sf_acts
= rcu_dereference(flow
->sf_acts
);
652 err
= ovs_execute_actions(dp
, packet
, sf_acts
, &flow
->key
);
656 ovs_flow_free(flow
, false);
662 ovs_flow_free(flow
, false);
669 static const struct nla_policy packet_policy
[OVS_PACKET_ATTR_MAX
+ 1] = {
670 [OVS_PACKET_ATTR_PACKET
] = { .len
= ETH_HLEN
},
671 [OVS_PACKET_ATTR_KEY
] = { .type
= NLA_NESTED
},
672 [OVS_PACKET_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
673 [OVS_PACKET_ATTR_PROBE
] = { .type
= NLA_FLAG
},
674 [OVS_PACKET_ATTR_MRU
] = { .type
= NLA_U16
},
677 static struct genl_ops dp_packet_genl_ops
[] = {
678 { .cmd
= OVS_PACKET_CMD_EXECUTE
,
679 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
680 .policy
= packet_policy
,
681 .doit
= ovs_packet_cmd_execute
685 static struct genl_family dp_packet_genl_family
= {
686 .id
= GENL_ID_GENERATE
,
687 .hdrsize
= sizeof(struct ovs_header
),
688 .name
= OVS_PACKET_FAMILY
,
689 .version
= OVS_PACKET_VERSION
,
690 .maxattr
= OVS_PACKET_ATTR_MAX
,
692 .parallel_ops
= true,
693 .ops
= dp_packet_genl_ops
,
694 .n_ops
= ARRAY_SIZE(dp_packet_genl_ops
),
697 static void get_dp_stats(const struct datapath
*dp
, struct ovs_dp_stats
*stats
,
698 struct ovs_dp_megaflow_stats
*mega_stats
)
702 memset(mega_stats
, 0, sizeof(*mega_stats
));
704 stats
->n_flows
= ovs_flow_tbl_count(&dp
->table
);
705 mega_stats
->n_masks
= ovs_flow_tbl_num_masks(&dp
->table
);
707 stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
709 for_each_possible_cpu(i
) {
710 const struct dp_stats_percpu
*percpu_stats
;
711 struct dp_stats_percpu local_stats
;
714 percpu_stats
= per_cpu_ptr(dp
->stats_percpu
, i
);
717 start
= u64_stats_fetch_begin_irq(&percpu_stats
->syncp
);
718 local_stats
= *percpu_stats
;
719 } while (u64_stats_fetch_retry_irq(&percpu_stats
->syncp
, start
));
721 stats
->n_hit
+= local_stats
.n_hit
;
722 stats
->n_missed
+= local_stats
.n_missed
;
723 stats
->n_lost
+= local_stats
.n_lost
;
724 mega_stats
->n_mask_hit
+= local_stats
.n_mask_hit
;
728 static bool should_fill_key(const struct sw_flow_id
*sfid
, uint32_t ufid_flags
)
730 return ovs_identifier_is_ufid(sfid
) &&
731 !(ufid_flags
& OVS_UFID_F_OMIT_KEY
);
734 static bool should_fill_mask(uint32_t ufid_flags
)
736 return !(ufid_flags
& OVS_UFID_F_OMIT_MASK
);
739 static bool should_fill_actions(uint32_t ufid_flags
)
741 return !(ufid_flags
& OVS_UFID_F_OMIT_ACTIONS
);
744 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions
*acts
,
745 const struct sw_flow_id
*sfid
,
748 size_t len
= NLMSG_ALIGN(sizeof(struct ovs_header
));
750 /* OVS_FLOW_ATTR_UFID */
751 if (sfid
&& ovs_identifier_is_ufid(sfid
))
752 len
+= nla_total_size(sfid
->ufid_len
);
754 /* OVS_FLOW_ATTR_KEY */
755 if (!sfid
|| should_fill_key(sfid
, ufid_flags
))
756 len
+= nla_total_size(ovs_key_attr_size());
758 /* OVS_FLOW_ATTR_MASK */
759 if (should_fill_mask(ufid_flags
))
760 len
+= nla_total_size(ovs_key_attr_size());
762 /* OVS_FLOW_ATTR_ACTIONS */
763 if (should_fill_actions(ufid_flags
))
764 len
+= nla_total_size(acts
->orig_len
);
767 + nla_total_size_64bit(sizeof(struct ovs_flow_stats
)) /* OVS_FLOW_ATTR_STATS */
768 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
769 + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */
772 /* Called with ovs_mutex or RCU read lock. */
773 static int ovs_flow_cmd_fill_stats(const struct sw_flow
*flow
,
776 struct ovs_flow_stats stats
;
780 ovs_flow_stats_get(flow
, &stats
, &used
, &tcp_flags
);
783 nla_put_u64_64bit(skb
, OVS_FLOW_ATTR_USED
, ovs_flow_used_time(used
),
787 if (stats
.n_packets
&&
788 nla_put_64bit(skb
, OVS_FLOW_ATTR_STATS
,
789 sizeof(struct ovs_flow_stats
), &stats
,
793 if ((u8
)ntohs(tcp_flags
) &&
794 nla_put_u8(skb
, OVS_FLOW_ATTR_TCP_FLAGS
, (u8
)ntohs(tcp_flags
)))
800 /* Called with ovs_mutex or RCU read lock. */
801 static int ovs_flow_cmd_fill_actions(const struct sw_flow
*flow
,
802 struct sk_buff
*skb
, int skb_orig_len
)
804 struct nlattr
*start
;
807 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
808 * this is the first flow to be dumped into 'skb'. This is unusual for
809 * Netlink but individual action lists can be longer than
810 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
811 * The userspace caller can always fetch the actions separately if it
812 * really wants them. (Most userspace callers in fact don't care.)
814 * This can only fail for dump operations because the skb is always
815 * properly sized for single flows.
817 start
= nla_nest_start(skb
, OVS_FLOW_ATTR_ACTIONS
);
819 const struct sw_flow_actions
*sf_acts
;
821 sf_acts
= rcu_dereference_ovsl(flow
->sf_acts
);
822 err
= ovs_nla_put_actions(sf_acts
->actions
,
823 sf_acts
->actions_len
, skb
);
826 nla_nest_end(skb
, start
);
831 nla_nest_cancel(skb
, start
);
833 } else if (skb_orig_len
) {
840 /* Called with ovs_mutex or RCU read lock. */
841 static int ovs_flow_cmd_fill_info(const struct sw_flow
*flow
, int dp_ifindex
,
842 struct sk_buff
*skb
, u32 portid
,
843 u32 seq
, u32 flags
, u8 cmd
, u32 ufid_flags
)
845 const int skb_orig_len
= skb
->len
;
846 struct ovs_header
*ovs_header
;
849 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_flow_genl_family
,
854 ovs_header
->dp_ifindex
= dp_ifindex
;
856 err
= ovs_nla_put_identifier(flow
, skb
);
860 if (should_fill_key(&flow
->id
, ufid_flags
)) {
861 err
= ovs_nla_put_masked_key(flow
, skb
);
866 if (should_fill_mask(ufid_flags
)) {
867 err
= ovs_nla_put_mask(flow
, skb
);
872 err
= ovs_flow_cmd_fill_stats(flow
, skb
);
876 if (should_fill_actions(ufid_flags
)) {
877 err
= ovs_flow_cmd_fill_actions(flow
, skb
, skb_orig_len
);
882 genlmsg_end(skb
, ovs_header
);
886 genlmsg_cancel(skb
, ovs_header
);
890 /* May not be called with RCU read lock. */
891 static struct sk_buff
*ovs_flow_cmd_alloc_info(const struct sw_flow_actions
*acts
,
892 const struct sw_flow_id
*sfid
,
893 struct genl_info
*info
,
900 if (!always
&& !ovs_must_notify(&dp_flow_genl_family
, info
,
901 GROUP_ID(&ovs_dp_flow_multicast_group
)))
904 len
= ovs_flow_cmd_msg_size(acts
, sfid
, ufid_flags
);
905 skb
= genlmsg_new(len
, GFP_KERNEL
);
907 return ERR_PTR(-ENOMEM
);
912 /* Called with ovs_mutex. */
913 static struct sk_buff
*ovs_flow_cmd_build_info(const struct sw_flow
*flow
,
915 struct genl_info
*info
, u8 cmd
,
916 bool always
, u32 ufid_flags
)
921 skb
= ovs_flow_cmd_alloc_info(ovsl_dereference(flow
->sf_acts
),
922 &flow
->id
, info
, always
, ufid_flags
);
923 if (IS_ERR_OR_NULL(skb
))
926 retval
= ovs_flow_cmd_fill_info(flow
, dp_ifindex
, skb
,
927 info
->snd_portid
, info
->snd_seq
, 0,
933 static int ovs_flow_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
935 struct net
*net
= sock_net(skb
->sk
);
936 struct nlattr
**a
= info
->attrs
;
937 struct ovs_header
*ovs_header
= info
->userhdr
;
938 struct sw_flow
*flow
= NULL
, *new_flow
;
939 struct sw_flow_mask mask
;
940 struct sk_buff
*reply
;
942 struct sw_flow_key key
;
943 struct sw_flow_actions
*acts
;
944 struct sw_flow_match match
;
945 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
947 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
949 /* Must have key and actions. */
951 if (!a
[OVS_FLOW_ATTR_KEY
]) {
952 OVS_NLERR(log
, "Flow key attr not present in new flow.");
955 if (!a
[OVS_FLOW_ATTR_ACTIONS
]) {
956 OVS_NLERR(log
, "Flow actions attr not present in new flow.");
960 /* Most of the time we need to allocate a new flow, do it before
963 new_flow
= ovs_flow_alloc();
964 if (IS_ERR(new_flow
)) {
965 error
= PTR_ERR(new_flow
);
970 ovs_match_init(&match
, &key
, &mask
);
971 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
972 a
[OVS_FLOW_ATTR_MASK
], log
);
976 ovs_flow_mask_key(&new_flow
->key
, &key
, true, &mask
);
978 /* Extract flow identifier. */
979 error
= ovs_nla_get_identifier(&new_flow
->id
, a
[OVS_FLOW_ATTR_UFID
],
984 /* Validate actions. */
985 error
= ovs_nla_copy_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
],
986 &new_flow
->key
, &acts
, log
);
988 OVS_NLERR(log
, "Flow actions may not be safe on all matching packets.");
992 reply
= ovs_flow_cmd_alloc_info(acts
, &new_flow
->id
, info
, false,
995 error
= PTR_ERR(reply
);
1000 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1001 if (unlikely(!dp
)) {
1003 goto err_unlock_ovs
;
1006 /* Check if this is a duplicate flow */
1007 if (ovs_identifier_is_ufid(&new_flow
->id
))
1008 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &new_flow
->id
);
1010 flow
= ovs_flow_tbl_lookup(&dp
->table
, &key
);
1011 if (likely(!flow
)) {
1012 rcu_assign_pointer(new_flow
->sf_acts
, acts
);
1014 /* Put flow in bucket. */
1015 error
= ovs_flow_tbl_insert(&dp
->table
, new_flow
, &mask
);
1016 if (unlikely(error
)) {
1018 goto err_unlock_ovs
;
1021 if (unlikely(reply
)) {
1022 error
= ovs_flow_cmd_fill_info(new_flow
,
1023 ovs_header
->dp_ifindex
,
1024 reply
, info
->snd_portid
,
1032 struct sw_flow_actions
*old_acts
;
1034 /* Bail out if we're not allowed to modify an existing flow.
1035 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1036 * because Generic Netlink treats the latter as a dump
1037 * request. We also accept NLM_F_EXCL in case that bug ever
1040 if (unlikely(info
->nlhdr
->nlmsg_flags
& (NLM_F_CREATE
1043 goto err_unlock_ovs
;
1045 /* The flow identifier has to be the same for flow updates.
1046 * Look for any overlapping flow.
1048 if (unlikely(!ovs_flow_cmp(flow
, &match
))) {
1049 if (ovs_identifier_is_key(&flow
->id
))
1050 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
,
1052 else /* UFID matches but key is different */
1056 goto err_unlock_ovs
;
1059 /* Update actions. */
1060 old_acts
= ovsl_dereference(flow
->sf_acts
);
1061 rcu_assign_pointer(flow
->sf_acts
, acts
);
1063 if (unlikely(reply
)) {
1064 error
= ovs_flow_cmd_fill_info(flow
,
1065 ovs_header
->dp_ifindex
,
1066 reply
, info
->snd_portid
,
1074 ovs_nla_free_flow_actions_rcu(old_acts
);
1075 ovs_flow_free(new_flow
, false);
1079 ovs_notify(&dp_flow_genl_family
, &ovs_dp_flow_multicast_group
, reply
, info
);
1086 ovs_nla_free_flow_actions(acts
);
1088 ovs_flow_free(new_flow
, false);
1093 /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */
1094 static struct sw_flow_actions
*get_flow_actions(struct net
*net
,
1095 const struct nlattr
*a
,
1096 const struct sw_flow_key
*key
,
1097 const struct sw_flow_mask
*mask
,
1100 struct sw_flow_actions
*acts
;
1101 struct sw_flow_key masked_key
;
1104 ovs_flow_mask_key(&masked_key
, key
, true, mask
);
1105 error
= ovs_nla_copy_actions(net
, a
, &masked_key
, &acts
, log
);
1108 "Actions may not be safe on all matching packets");
1109 return ERR_PTR(error
);
1115 static int ovs_flow_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1117 struct net
*net
= sock_net(skb
->sk
);
1118 struct nlattr
**a
= info
->attrs
;
1119 struct ovs_header
*ovs_header
= info
->userhdr
;
1120 struct sw_flow_key key
;
1121 struct sw_flow
*flow
;
1122 struct sw_flow_mask mask
;
1123 struct sk_buff
*reply
= NULL
;
1124 struct datapath
*dp
;
1125 struct sw_flow_actions
*old_acts
= NULL
, *acts
= NULL
;
1126 struct sw_flow_match match
;
1127 struct sw_flow_id sfid
;
1128 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1130 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1133 ufid_present
= ovs_nla_get_ufid(&sfid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1134 if (a
[OVS_FLOW_ATTR_KEY
]) {
1135 ovs_match_init(&match
, &key
, &mask
);
1136 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1137 a
[OVS_FLOW_ATTR_MASK
], log
);
1138 } else if (!ufid_present
) {
1140 "Flow set message rejected, Key attribute missing.");
1146 /* Validate actions. */
1147 if (a
[OVS_FLOW_ATTR_ACTIONS
]) {
1148 if (!a
[OVS_FLOW_ATTR_KEY
]) {
1150 "Flow key attribute not present in set flow.");
1155 acts
= get_flow_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
], &key
,
1158 error
= PTR_ERR(acts
);
1162 /* Can allocate before locking if have acts. */
1163 reply
= ovs_flow_cmd_alloc_info(acts
, &sfid
, info
, false,
1165 if (IS_ERR(reply
)) {
1166 error
= PTR_ERR(reply
);
1167 goto err_kfree_acts
;
1172 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1173 if (unlikely(!dp
)) {
1175 goto err_unlock_ovs
;
1177 /* Check that the flow exists. */
1179 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &sfid
);
1181 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1182 if (unlikely(!flow
)) {
1184 goto err_unlock_ovs
;
1187 /* Update actions, if present. */
1189 old_acts
= ovsl_dereference(flow
->sf_acts
);
1190 rcu_assign_pointer(flow
->sf_acts
, acts
);
1192 if (unlikely(reply
)) {
1193 error
= ovs_flow_cmd_fill_info(flow
,
1194 ovs_header
->dp_ifindex
,
1195 reply
, info
->snd_portid
,
1202 /* Could not alloc without acts before locking. */
1203 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
,
1204 info
, OVS_FLOW_CMD_NEW
, false,
1207 if (unlikely(IS_ERR(reply
))) {
1208 error
= PTR_ERR(reply
);
1209 goto err_unlock_ovs
;
1214 if (a
[OVS_FLOW_ATTR_CLEAR
])
1215 ovs_flow_stats_clear(flow
);
1219 ovs_notify(&dp_flow_genl_family
, &ovs_dp_flow_multicast_group
, reply
, info
);
1221 ovs_nla_free_flow_actions_rcu(old_acts
);
1229 ovs_nla_free_flow_actions(acts
);
1234 static int ovs_flow_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1236 struct nlattr
**a
= info
->attrs
;
1237 struct ovs_header
*ovs_header
= info
->userhdr
;
1238 struct net
*net
= sock_net(skb
->sk
);
1239 struct sw_flow_key key
;
1240 struct sk_buff
*reply
;
1241 struct sw_flow
*flow
;
1242 struct datapath
*dp
;
1243 struct sw_flow_match match
;
1244 struct sw_flow_id ufid
;
1245 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1247 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1250 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1251 if (a
[OVS_FLOW_ATTR_KEY
]) {
1252 ovs_match_init(&match
, &key
, NULL
);
1253 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
], NULL
,
1255 } else if (!ufid_present
) {
1257 "Flow get message rejected, Key attribute missing.");
1264 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1271 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1273 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1279 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
, info
,
1280 OVS_FLOW_CMD_NEW
, true, ufid_flags
);
1281 if (IS_ERR(reply
)) {
1282 err
= PTR_ERR(reply
);
1287 return genlmsg_reply(reply
, info
);
1293 static int ovs_flow_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1295 struct nlattr
**a
= info
->attrs
;
1296 struct ovs_header
*ovs_header
= info
->userhdr
;
1297 struct net
*net
= sock_net(skb
->sk
);
1298 struct sw_flow_key key
;
1299 struct sk_buff
*reply
;
1300 struct sw_flow
*flow
= NULL
;
1301 struct datapath
*dp
;
1302 struct sw_flow_match match
;
1303 struct sw_flow_id ufid
;
1304 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1306 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1309 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1310 if (a
[OVS_FLOW_ATTR_KEY
]) {
1311 ovs_match_init(&match
, &key
, NULL
);
1312 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1319 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1320 if (unlikely(!dp
)) {
1325 if (unlikely(!a
[OVS_FLOW_ATTR_KEY
] && !ufid_present
)) {
1326 err
= ovs_flow_tbl_flush(&dp
->table
);
1331 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1333 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1334 if (unlikely(!flow
)) {
1339 ovs_flow_tbl_remove(&dp
->table
, flow
);
1342 reply
= ovs_flow_cmd_alloc_info(rcu_dereference_raw(flow
->sf_acts
),
1343 &flow
->id
, info
, false, ufid_flags
);
1345 if (likely(reply
)) {
1346 if (likely(!IS_ERR(reply
))) {
1347 rcu_read_lock(); /*To keep RCU checker happy. */
1348 err
= ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
,
1349 reply
, info
->snd_portid
,
1355 ovs_notify(&dp_flow_genl_family
, &ovs_dp_flow_multicast_group
, reply
, info
);
1357 genl_set_err(&dp_flow_genl_family
, sock_net(skb
->sk
), 0,
1358 GROUP_ID(&ovs_dp_flow_multicast_group
), PTR_ERR(reply
));
1363 ovs_flow_free(flow
, true);
1370 static int ovs_flow_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1372 struct nlattr
*a
[__OVS_FLOW_ATTR_MAX
];
1373 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1374 struct table_instance
*ti
;
1375 struct datapath
*dp
;
1379 err
= genlmsg_parse(cb
->nlh
, &dp_flow_genl_family
, a
,
1380 OVS_FLOW_ATTR_MAX
, flow_policy
);
1383 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1386 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1392 ti
= rcu_dereference(dp
->table
.ti
);
1394 struct sw_flow
*flow
;
1397 bucket
= cb
->args
[0];
1399 flow
= ovs_flow_tbl_dump_next(ti
, &bucket
, &obj
);
1403 if (ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
, skb
,
1404 NETLINK_CB(cb
->skb
).portid
,
1405 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1406 OVS_FLOW_CMD_NEW
, ufid_flags
) < 0)
1409 cb
->args
[0] = bucket
;
1416 static const struct nla_policy flow_policy
[OVS_FLOW_ATTR_MAX
+ 1] = {
1417 [OVS_FLOW_ATTR_KEY
] = { .type
= NLA_NESTED
},
1418 [OVS_FLOW_ATTR_MASK
] = { .type
= NLA_NESTED
},
1419 [OVS_FLOW_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
1420 [OVS_FLOW_ATTR_CLEAR
] = { .type
= NLA_FLAG
},
1421 [OVS_FLOW_ATTR_PROBE
] = { .type
= NLA_FLAG
},
1422 [OVS_FLOW_ATTR_UFID
] = { .type
= NLA_UNSPEC
, .len
= 1 },
1423 [OVS_FLOW_ATTR_UFID_FLAGS
] = { .type
= NLA_U32
},
1426 static struct genl_ops dp_flow_genl_ops
[] = {
1427 { .cmd
= OVS_FLOW_CMD_NEW
,
1428 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1429 .policy
= flow_policy
,
1430 .doit
= ovs_flow_cmd_new
1432 { .cmd
= OVS_FLOW_CMD_DEL
,
1433 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1434 .policy
= flow_policy
,
1435 .doit
= ovs_flow_cmd_del
1437 { .cmd
= OVS_FLOW_CMD_GET
,
1438 .flags
= 0, /* OK for unprivileged users. */
1439 .policy
= flow_policy
,
1440 .doit
= ovs_flow_cmd_get
,
1441 .dumpit
= ovs_flow_cmd_dump
1443 { .cmd
= OVS_FLOW_CMD_SET
,
1444 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1445 .policy
= flow_policy
,
1446 .doit
= ovs_flow_cmd_set
,
1450 static struct genl_family dp_flow_genl_family
= {
1451 .id
= GENL_ID_GENERATE
,
1452 .hdrsize
= sizeof(struct ovs_header
),
1453 .name
= OVS_FLOW_FAMILY
,
1454 .version
= OVS_FLOW_VERSION
,
1455 .maxattr
= OVS_FLOW_ATTR_MAX
,
1457 .parallel_ops
= true,
1458 .ops
= dp_flow_genl_ops
,
1459 .n_ops
= ARRAY_SIZE(dp_flow_genl_ops
),
1460 .mcgrps
= &ovs_dp_flow_multicast_group
,
1464 static size_t ovs_dp_cmd_msg_size(void)
1466 size_t msgsize
= NLMSG_ALIGN(sizeof(struct ovs_header
));
1468 msgsize
+= nla_total_size(IFNAMSIZ
);
1469 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_stats
));
1470 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats
));
1471 msgsize
+= nla_total_size(sizeof(u32
)); /* OVS_DP_ATTR_USER_FEATURES */
1476 /* Called with ovs_mutex. */
1477 static int ovs_dp_cmd_fill_info(struct datapath
*dp
, struct sk_buff
*skb
,
1478 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1480 struct ovs_header
*ovs_header
;
1481 struct ovs_dp_stats dp_stats
;
1482 struct ovs_dp_megaflow_stats dp_megaflow_stats
;
1485 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_datapath_genl_family
,
1490 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
1492 err
= nla_put_string(skb
, OVS_DP_ATTR_NAME
, ovs_dp_name(dp
));
1494 goto nla_put_failure
;
1496 get_dp_stats(dp
, &dp_stats
, &dp_megaflow_stats
);
1497 if (nla_put_64bit(skb
, OVS_DP_ATTR_STATS
, sizeof(struct ovs_dp_stats
),
1498 &dp_stats
, OVS_DP_ATTR_PAD
))
1499 goto nla_put_failure
;
1501 if (nla_put_64bit(skb
, OVS_DP_ATTR_MEGAFLOW_STATS
,
1502 sizeof(struct ovs_dp_megaflow_stats
),
1503 &dp_megaflow_stats
, OVS_DP_ATTR_PAD
))
1504 goto nla_put_failure
;
1506 if (nla_put_u32(skb
, OVS_DP_ATTR_USER_FEATURES
, dp
->user_features
))
1507 goto nla_put_failure
;
1509 genlmsg_end(skb
, ovs_header
);
1513 genlmsg_cancel(skb
, ovs_header
);
1518 static struct sk_buff
*ovs_dp_cmd_alloc_info(void)
1520 return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL
);
1523 /* Called with rcu_read_lock or ovs_mutex. */
1524 static struct datapath
*lookup_datapath(struct net
*net
,
1525 const struct ovs_header
*ovs_header
,
1526 struct nlattr
*a
[OVS_DP_ATTR_MAX
+ 1])
1528 struct datapath
*dp
;
1530 if (!a
[OVS_DP_ATTR_NAME
])
1531 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1533 struct vport
*vport
;
1535 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_DP_ATTR_NAME
]));
1536 dp
= vport
&& vport
->port_no
== OVSP_LOCAL
? vport
->dp
: NULL
;
1538 return dp
? dp
: ERR_PTR(-ENODEV
);
1541 static void ovs_dp_reset_user_features(struct sk_buff
*skb
, struct genl_info
*info
)
1543 struct datapath
*dp
;
1545 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1549 WARN(dp
->user_features
, "Dropping previously announced user features\n");
1550 dp
->user_features
= 0;
1553 static void ovs_dp_change(struct datapath
*dp
, struct nlattr
*a
[])
1555 if (a
[OVS_DP_ATTR_USER_FEATURES
])
1556 dp
->user_features
= nla_get_u32(a
[OVS_DP_ATTR_USER_FEATURES
]);
1559 static int ovs_dp_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1561 struct nlattr
**a
= info
->attrs
;
1562 struct vport_parms parms
;
1563 struct sk_buff
*reply
;
1564 struct datapath
*dp
;
1565 struct vport
*vport
;
1566 struct ovs_net
*ovs_net
;
1570 if (!a
[OVS_DP_ATTR_NAME
] || !a
[OVS_DP_ATTR_UPCALL_PID
])
1573 reply
= ovs_dp_cmd_alloc_info();
1578 dp
= kzalloc(sizeof(*dp
), GFP_KERNEL
);
1580 goto err_free_reply
;
1582 ovs_dp_set_net(dp
, sock_net(skb
->sk
));
1584 /* Allocate table. */
1585 err
= ovs_flow_tbl_init(&dp
->table
);
1589 dp
->stats_percpu
= netdev_alloc_pcpu_stats(struct dp_stats_percpu
);
1590 if (!dp
->stats_percpu
) {
1592 goto err_destroy_table
;
1595 dp
->ports
= kmalloc(DP_VPORT_HASH_BUCKETS
* sizeof(struct hlist_head
),
1599 goto err_destroy_percpu
;
1602 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1603 INIT_HLIST_HEAD(&dp
->ports
[i
]);
1605 /* Set up our datapath device. */
1606 parms
.name
= nla_data(a
[OVS_DP_ATTR_NAME
]);
1607 parms
.type
= OVS_VPORT_TYPE_INTERNAL
;
1608 parms
.options
= NULL
;
1610 parms
.port_no
= OVSP_LOCAL
;
1611 parms
.upcall_portids
= a
[OVS_DP_ATTR_UPCALL_PID
];
1613 ovs_dp_change(dp
, a
);
1615 /* So far only local changes have been made, now need the lock. */
1618 vport
= new_vport(&parms
);
1619 if (IS_ERR(vport
)) {
1620 err
= PTR_ERR(vport
);
1624 if (err
== -EEXIST
) {
1625 /* An outdated user space instance that does not understand
1626 * the concept of user_features has attempted to create a new
1627 * datapath and is likely to reuse it. Drop all user features.
1629 if (info
->genlhdr
->version
< OVS_DP_VER_FEATURES
)
1630 ovs_dp_reset_user_features(skb
, info
);
1633 goto err_destroy_ports_array
;
1636 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1637 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1640 ovs_net
= net_generic(ovs_dp_get_net(dp
), ovs_net_id
);
1641 list_add_tail_rcu(&dp
->list_node
, &ovs_net
->dps
);
1645 ovs_notify(&dp_datapath_genl_family
, &ovs_dp_datapath_multicast_group
, reply
, info
);
1648 err_destroy_ports_array
:
1652 free_percpu(dp
->stats_percpu
);
1654 ovs_flow_tbl_destroy(&dp
->table
);
1663 /* Called with ovs_mutex. */
1664 static void __dp_destroy(struct datapath
*dp
)
1668 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1669 struct vport
*vport
;
1670 struct hlist_node
*n
;
1672 hlist_for_each_entry_safe(vport
, n
, &dp
->ports
[i
], dp_hash_node
)
1673 if (vport
->port_no
!= OVSP_LOCAL
)
1674 ovs_dp_detach_port(vport
);
1677 list_del_rcu(&dp
->list_node
);
1679 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1680 * all ports in datapath are destroyed first before freeing datapath.
1682 ovs_dp_detach_port(ovs_vport_ovsl(dp
, OVSP_LOCAL
));
1684 /* RCU destroy the flow table */
1685 call_rcu(&dp
->rcu
, destroy_dp_rcu
);
1688 static int ovs_dp_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1690 struct sk_buff
*reply
;
1691 struct datapath
*dp
;
1694 reply
= ovs_dp_cmd_alloc_info();
1699 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1702 goto err_unlock_free
;
1704 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1705 info
->snd_seq
, 0, OVS_DP_CMD_DEL
);
1711 ovs_notify(&dp_datapath_genl_family
, &ovs_dp_datapath_multicast_group
, reply
, info
);
1720 static int ovs_dp_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1722 struct sk_buff
*reply
;
1723 struct datapath
*dp
;
1726 reply
= ovs_dp_cmd_alloc_info();
1731 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1734 goto err_unlock_free
;
1736 ovs_dp_change(dp
, info
->attrs
);
1738 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1739 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1744 ovs_notify(&dp_datapath_genl_family
, &ovs_dp_datapath_multicast_group
, reply
, info
);
1753 static int ovs_dp_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1755 struct sk_buff
*reply
;
1756 struct datapath
*dp
;
1759 reply
= ovs_dp_cmd_alloc_info();
1764 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1767 goto err_unlock_free
;
1769 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1770 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1774 return genlmsg_reply(reply
, info
);
1782 static int ovs_dp_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1784 struct ovs_net
*ovs_net
= net_generic(sock_net(skb
->sk
), ovs_net_id
);
1785 struct datapath
*dp
;
1786 int skip
= cb
->args
[0];
1790 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
1792 ovs_dp_cmd_fill_info(dp
, skb
, NETLINK_CB(cb
->skb
).portid
,
1793 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1794 OVS_DP_CMD_NEW
) < 0)
1805 static const struct nla_policy datapath_policy
[OVS_DP_ATTR_MAX
+ 1] = {
1806 [OVS_DP_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1807 [OVS_DP_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1808 [OVS_DP_ATTR_USER_FEATURES
] = { .type
= NLA_U32
},
1811 static struct genl_ops dp_datapath_genl_ops
[] = {
1812 { .cmd
= OVS_DP_CMD_NEW
,
1813 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1814 .policy
= datapath_policy
,
1815 .doit
= ovs_dp_cmd_new
1817 { .cmd
= OVS_DP_CMD_DEL
,
1818 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1819 .policy
= datapath_policy
,
1820 .doit
= ovs_dp_cmd_del
1822 { .cmd
= OVS_DP_CMD_GET
,
1823 .flags
= 0, /* OK for unprivileged users. */
1824 .policy
= datapath_policy
,
1825 .doit
= ovs_dp_cmd_get
,
1826 .dumpit
= ovs_dp_cmd_dump
1828 { .cmd
= OVS_DP_CMD_SET
,
1829 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1830 .policy
= datapath_policy
,
1831 .doit
= ovs_dp_cmd_set
,
1835 static struct genl_family dp_datapath_genl_family
= {
1836 .id
= GENL_ID_GENERATE
,
1837 .hdrsize
= sizeof(struct ovs_header
),
1838 .name
= OVS_DATAPATH_FAMILY
,
1839 .version
= OVS_DATAPATH_VERSION
,
1840 .maxattr
= OVS_DP_ATTR_MAX
,
1842 .parallel_ops
= true,
1843 .ops
= dp_datapath_genl_ops
,
1844 .n_ops
= ARRAY_SIZE(dp_datapath_genl_ops
),
1845 .mcgrps
= &ovs_dp_datapath_multicast_group
,
1849 /* Called with ovs_mutex or RCU read lock. */
1850 static int ovs_vport_cmd_fill_info(struct vport
*vport
, struct sk_buff
*skb
,
1851 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1853 struct ovs_header
*ovs_header
;
1854 struct ovs_vport_stats vport_stats
;
1857 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_vport_genl_family
,
1862 ovs_header
->dp_ifindex
= get_dpifindex(vport
->dp
);
1864 if (nla_put_u32(skb
, OVS_VPORT_ATTR_PORT_NO
, vport
->port_no
) ||
1865 nla_put_u32(skb
, OVS_VPORT_ATTR_TYPE
, vport
->ops
->type
) ||
1866 nla_put_string(skb
, OVS_VPORT_ATTR_NAME
,
1867 ovs_vport_name(vport
)))
1868 goto nla_put_failure
;
1870 ovs_vport_get_stats(vport
, &vport_stats
);
1871 if (nla_put_64bit(skb
, OVS_VPORT_ATTR_STATS
,
1872 sizeof(struct ovs_vport_stats
), &vport_stats
,
1873 OVS_VPORT_ATTR_PAD
))
1874 goto nla_put_failure
;
1876 if (ovs_vport_get_upcall_portids(vport
, skb
))
1877 goto nla_put_failure
;
1879 err
= ovs_vport_get_options(vport
, skb
);
1880 if (err
== -EMSGSIZE
)
1883 genlmsg_end(skb
, ovs_header
);
1889 genlmsg_cancel(skb
, ovs_header
);
1893 static struct sk_buff
*ovs_vport_cmd_alloc_info(void)
1895 return nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1898 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1899 struct sk_buff
*ovs_vport_cmd_build_info(struct vport
*vport
, u32 portid
,
1902 struct sk_buff
*skb
;
1905 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
1907 return ERR_PTR(-ENOMEM
);
1909 retval
= ovs_vport_cmd_fill_info(vport
, skb
, portid
, seq
, 0, cmd
);
1915 /* Called with ovs_mutex or RCU read lock. */
1916 static struct vport
*lookup_vport(struct net
*net
,
1917 const struct ovs_header
*ovs_header
,
1918 struct nlattr
*a
[OVS_VPORT_ATTR_MAX
+ 1])
1920 struct datapath
*dp
;
1921 struct vport
*vport
;
1923 if (a
[OVS_VPORT_ATTR_NAME
]) {
1924 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_VPORT_ATTR_NAME
]));
1926 return ERR_PTR(-ENODEV
);
1927 if (ovs_header
->dp_ifindex
&&
1928 ovs_header
->dp_ifindex
!= get_dpifindex(vport
->dp
))
1929 return ERR_PTR(-ENODEV
);
1931 } else if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
1932 u32 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1934 if (port_no
>= DP_MAX_PORTS
)
1935 return ERR_PTR(-EFBIG
);
1937 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1939 return ERR_PTR(-ENODEV
);
1941 vport
= ovs_vport_ovsl_rcu(dp
, port_no
);
1943 return ERR_PTR(-ENODEV
);
1946 return ERR_PTR(-EINVAL
);
1949 /* Called with ovs_mutex */
1950 static void update_headroom(struct datapath
*dp
)
1952 unsigned dev_headroom
, max_headroom
= 0;
1953 struct net_device
*dev
;
1954 struct vport
*vport
;
1957 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1958 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
1960 dev_headroom
= netdev_get_fwd_headroom(dev
);
1961 if (dev_headroom
> max_headroom
)
1962 max_headroom
= dev_headroom
;
1966 dp
->max_headroom
= max_headroom
;
1967 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1968 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
)
1969 netdev_set_rx_headroom(vport
->dev
, max_headroom
);
1972 static int ovs_vport_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1974 struct nlattr
**a
= info
->attrs
;
1975 struct ovs_header
*ovs_header
= info
->userhdr
;
1976 struct vport_parms parms
;
1977 struct sk_buff
*reply
;
1978 struct vport
*vport
;
1979 struct datapath
*dp
;
1983 if (!a
[OVS_VPORT_ATTR_NAME
] || !a
[OVS_VPORT_ATTR_TYPE
] ||
1984 !a
[OVS_VPORT_ATTR_UPCALL_PID
])
1987 port_no
= a
[OVS_VPORT_ATTR_PORT_NO
]
1988 ? nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]) : 0;
1989 if (port_no
>= DP_MAX_PORTS
)
1992 reply
= ovs_vport_cmd_alloc_info();
1998 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2001 goto exit_unlock_free
;
2004 vport
= ovs_vport_ovsl(dp
, port_no
);
2007 goto exit_unlock_free
;
2009 for (port_no
= 1; ; port_no
++) {
2010 if (port_no
>= DP_MAX_PORTS
) {
2012 goto exit_unlock_free
;
2014 vport
= ovs_vport_ovsl(dp
, port_no
);
2020 parms
.name
= nla_data(a
[OVS_VPORT_ATTR_NAME
]);
2021 parms
.type
= nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]);
2022 parms
.options
= a
[OVS_VPORT_ATTR_OPTIONS
];
2024 parms
.port_no
= port_no
;
2025 parms
.upcall_portids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2027 vport
= new_vport(&parms
);
2028 err
= PTR_ERR(vport
);
2029 if (IS_ERR(vport
)) {
2032 goto exit_unlock_free
;
2035 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2036 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2039 if (netdev_get_fwd_headroom(vport
->dev
) > dp
->max_headroom
)
2040 update_headroom(dp
);
2042 netdev_set_rx_headroom(vport
->dev
, dp
->max_headroom
);
2046 ovs_notify(&dp_vport_genl_family
, &ovs_dp_vport_multicast_group
, reply
, info
);
2055 static int ovs_vport_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
2057 struct nlattr
**a
= info
->attrs
;
2058 struct sk_buff
*reply
;
2059 struct vport
*vport
;
2062 reply
= ovs_vport_cmd_alloc_info();
2067 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2068 err
= PTR_ERR(vport
);
2070 goto exit_unlock_free
;
2072 if (a
[OVS_VPORT_ATTR_TYPE
] &&
2073 nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]) != vport
->ops
->type
) {
2075 goto exit_unlock_free
;
2078 if (a
[OVS_VPORT_ATTR_OPTIONS
]) {
2079 err
= ovs_vport_set_options(vport
, a
[OVS_VPORT_ATTR_OPTIONS
]);
2081 goto exit_unlock_free
;
2084 if (a
[OVS_VPORT_ATTR_UPCALL_PID
]) {
2085 struct nlattr
*ids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2087 err
= ovs_vport_set_upcall_portids(vport
, ids
);
2089 goto exit_unlock_free
;
2092 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2093 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2097 ovs_notify(&dp_vport_genl_family
, &ovs_dp_vport_multicast_group
, reply
, info
);
2106 static int ovs_vport_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
2108 bool must_update_headroom
= false;
2109 struct nlattr
**a
= info
->attrs
;
2110 struct sk_buff
*reply
;
2111 struct datapath
*dp
;
2112 struct vport
*vport
;
2115 reply
= ovs_vport_cmd_alloc_info();
2120 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2121 err
= PTR_ERR(vport
);
2123 goto exit_unlock_free
;
2125 if (vport
->port_no
== OVSP_LOCAL
) {
2127 goto exit_unlock_free
;
2130 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2131 info
->snd_seq
, 0, OVS_VPORT_CMD_DEL
);
2134 /* the vport deletion may trigger dp headroom update */
2136 if (netdev_get_fwd_headroom(vport
->dev
) == dp
->max_headroom
)
2137 must_update_headroom
= true;
2138 netdev_reset_rx_headroom(vport
->dev
);
2139 ovs_dp_detach_port(vport
);
2141 if (must_update_headroom
)
2142 update_headroom(dp
);
2146 ovs_notify(&dp_vport_genl_family
, &ovs_dp_vport_multicast_group
, reply
, info
);
2155 static int ovs_vport_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
2157 struct nlattr
**a
= info
->attrs
;
2158 struct ovs_header
*ovs_header
= info
->userhdr
;
2159 struct sk_buff
*reply
;
2160 struct vport
*vport
;
2163 reply
= ovs_vport_cmd_alloc_info();
2168 vport
= lookup_vport(sock_net(skb
->sk
), ovs_header
, a
);
2169 err
= PTR_ERR(vport
);
2171 goto exit_unlock_free
;
2172 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2173 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2177 return genlmsg_reply(reply
, info
);
2185 static int ovs_vport_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2187 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
2188 struct datapath
*dp
;
2189 int bucket
= cb
->args
[0], skip
= cb
->args
[1];
2193 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2198 for (i
= bucket
; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2199 struct vport
*vport
;
2202 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
2204 ovs_vport_cmd_fill_info(vport
, skb
,
2205 NETLINK_CB(cb
->skb
).portid
,
2208 OVS_VPORT_CMD_NEW
) < 0)
2224 static const struct nla_policy vport_policy
[OVS_VPORT_ATTR_MAX
+ 1] = {
2225 [OVS_VPORT_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
2226 [OVS_VPORT_ATTR_STATS
] = { .len
= sizeof(struct ovs_vport_stats
) },
2227 [OVS_VPORT_ATTR_PORT_NO
] = { .type
= NLA_U32
},
2228 [OVS_VPORT_ATTR_TYPE
] = { .type
= NLA_U32
},
2229 [OVS_VPORT_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
2230 [OVS_VPORT_ATTR_OPTIONS
] = { .type
= NLA_NESTED
},
2233 static struct genl_ops dp_vport_genl_ops
[] = {
2234 { .cmd
= OVS_VPORT_CMD_NEW
,
2235 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2236 .policy
= vport_policy
,
2237 .doit
= ovs_vport_cmd_new
2239 { .cmd
= OVS_VPORT_CMD_DEL
,
2240 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2241 .policy
= vport_policy
,
2242 .doit
= ovs_vport_cmd_del
2244 { .cmd
= OVS_VPORT_CMD_GET
,
2245 .flags
= 0, /* OK for unprivileged users. */
2246 .policy
= vport_policy
,
2247 .doit
= ovs_vport_cmd_get
,
2248 .dumpit
= ovs_vport_cmd_dump
2250 { .cmd
= OVS_VPORT_CMD_SET
,
2251 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2252 .policy
= vport_policy
,
2253 .doit
= ovs_vport_cmd_set
,
2257 struct genl_family dp_vport_genl_family
= {
2258 .id
= GENL_ID_GENERATE
,
2259 .hdrsize
= sizeof(struct ovs_header
),
2260 .name
= OVS_VPORT_FAMILY
,
2261 .version
= OVS_VPORT_VERSION
,
2262 .maxattr
= OVS_VPORT_ATTR_MAX
,
2264 .parallel_ops
= true,
2265 .ops
= dp_vport_genl_ops
,
2266 .n_ops
= ARRAY_SIZE(dp_vport_genl_ops
),
2267 .mcgrps
= &ovs_dp_vport_multicast_group
,
2271 static struct genl_family
*dp_genl_families
[] = {
2272 &dp_datapath_genl_family
,
2273 &dp_vport_genl_family
,
2274 &dp_flow_genl_family
,
2275 &dp_packet_genl_family
,
2278 static void dp_unregister_genl(int n_families
)
2282 for (i
= 0; i
< n_families
; i
++)
2283 genl_unregister_family(dp_genl_families
[i
]);
2286 static int dp_register_genl(void)
2291 for (i
= 0; i
< ARRAY_SIZE(dp_genl_families
); i
++) {
2293 err
= genl_register_family(dp_genl_families
[i
]);
2301 dp_unregister_genl(i
);
2305 static int __net_init
ovs_init_net(struct net
*net
)
2307 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2309 INIT_LIST_HEAD(&ovs_net
->dps
);
2310 INIT_WORK(&ovs_net
->dp_notify_work
, ovs_dp_notify_wq
);
2315 static void __net_exit
list_vports_from_net(struct net
*net
, struct net
*dnet
,
2316 struct list_head
*head
)
2318 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2319 struct datapath
*dp
;
2321 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
2324 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2325 struct vport
*vport
;
2327 hlist_for_each_entry(vport
, &dp
->ports
[i
], dp_hash_node
) {
2329 if (vport
->ops
->type
!= OVS_VPORT_TYPE_INTERNAL
)
2332 if (dev_net(vport
->dev
) == dnet
)
2333 list_add(&vport
->detach_list
, head
);
2339 static void __net_exit
ovs_exit_net(struct net
*dnet
)
2341 struct datapath
*dp
, *dp_next
;
2342 struct ovs_net
*ovs_net
= net_generic(dnet
, ovs_net_id
);
2343 struct vport
*vport
, *vport_next
;
2349 list_for_each_entry_safe(dp
, dp_next
, &ovs_net
->dps
, list_node
)
2354 list_vports_from_net(net
, dnet
, &head
);
2357 /* Detach all vports from given namespace. */
2358 list_for_each_entry_safe(vport
, vport_next
, &head
, detach_list
) {
2359 list_del(&vport
->detach_list
);
2360 ovs_dp_detach_port(vport
);
2365 cancel_work_sync(&ovs_net
->dp_notify_work
);
2368 static struct pernet_operations ovs_net_ops
= {
2369 .init
= ovs_init_net
,
2370 .exit
= ovs_exit_net
,
2372 .size
= sizeof(struct ovs_net
),
2375 static int __init
dp_init(void)
2379 BUILD_BUG_ON(sizeof(struct ovs_skb_cb
) > FIELD_SIZEOF(struct sk_buff
, cb
));
2381 pr_info("Open vSwitch switching datapath %s\n", VERSION
);
2383 err
= compat_init();
2387 err
= action_fifos_init();
2389 goto error_compat_exit
;
2391 err
= ovs_internal_dev_rtnl_link_register();
2393 goto error_action_fifos_exit
;
2395 err
= ovs_flow_init();
2397 goto error_unreg_rtnl_link
;
2399 err
= ovs_vport_init();
2401 goto error_flow_exit
;
2403 err
= register_pernet_device(&ovs_net_ops
);
2405 goto error_vport_exit
;
2407 err
= register_netdevice_notifier(&ovs_dp_device_notifier
);
2409 goto error_netns_exit
;
2411 err
= ovs_netdev_init();
2413 goto error_unreg_notifier
;
2415 err
= dp_register_genl();
2417 goto error_unreg_netdev
;
2423 error_unreg_notifier
:
2424 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2426 unregister_pernet_device(&ovs_net_ops
);
2431 error_unreg_rtnl_link
:
2432 ovs_internal_dev_rtnl_link_unregister();
2433 error_action_fifos_exit
:
2434 action_fifos_exit();
2441 static void dp_cleanup(void)
2443 dp_unregister_genl(ARRAY_SIZE(dp_genl_families
));
2445 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2446 unregister_pernet_device(&ovs_net_ops
);
2450 ovs_internal_dev_rtnl_link_unregister();
2451 action_fifos_exit();
2455 module_init(dp_init
);
2456 module_exit(dp_cleanup
);
2458 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2459 MODULE_LICENSE("GPL");
2460 MODULE_VERSION(VERSION
);