2 * Copyright (c) 2007-2013 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/lockdep.h>
48 #include <linux/openvswitch.h>
49 #include <linux/rculist.h>
50 #include <linux/dmi.h>
51 #include <linux/workqueue.h>
52 #include <net/genetlink.h>
53 #include <net/net_namespace.h>
54 #include <net/netns/generic.h>
58 #include "flow_netlink.h"
59 #include "vport-internal_dev.h"
60 #include "vport-netdev.h"
62 int ovs_net_id __read_mostly
;
64 static void ovs_notify(struct sk_buff
*skb
, struct genl_info
*info
,
65 struct genl_multicast_group
*grp
)
67 genl_notify(skb
, genl_info_net(info
), info
->snd_portid
,
68 grp
->id
, info
->nlhdr
, GFP_KERNEL
);
74 * All writes e.g. Writes to device state (add/remove datapath, port, set
75 * operations on vports, etc.), Writes to other state (flow table
76 * modifications, set miscellaneous datapath parameters, etc.) are protected
79 * Reads are protected by RCU.
81 * There are a few special cases (mostly stats) that have their own
82 * synchronization but they nest under all of above and don't interact with
85 * The RTNL lock nests inside ovs_mutex.
88 static DEFINE_MUTEX(ovs_mutex
);
92 mutex_lock(&ovs_mutex
);
97 mutex_unlock(&ovs_mutex
);
100 #ifdef CONFIG_LOCKDEP
101 int lockdep_ovsl_is_held(void)
104 return lockdep_is_held(&ovs_mutex
);
110 static struct vport
*new_vport(const struct vport_parms
*);
111 static int queue_gso_packets(struct net
*, int dp_ifindex
, struct sk_buff
*,
112 const struct dp_upcall_info
*);
113 static int queue_userspace_packet(struct net
*, int dp_ifindex
,
115 const struct dp_upcall_info
*);
117 /* Must be called with rcu_read_lock or ovs_mutex. */
118 static struct datapath
*get_dp(struct net
*net
, int dp_ifindex
)
120 struct datapath
*dp
= NULL
;
121 struct net_device
*dev
;
124 dev
= dev_get_by_index_rcu(net
, dp_ifindex
);
126 struct vport
*vport
= ovs_internal_dev_get_vport(dev
);
135 /* Must be called with rcu_read_lock or ovs_mutex. */
136 const char *ovs_dp_name(const struct datapath
*dp
)
138 struct vport
*vport
= ovs_vport_ovsl_rcu(dp
, OVSP_LOCAL
);
139 return vport
->ops
->get_name(vport
);
142 static int get_dpifindex(struct datapath
*dp
)
149 local
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
151 ifindex
= netdev_vport_priv(local
)->dev
->ifindex
;
160 static void destroy_dp_rcu(struct rcu_head
*rcu
)
162 struct datapath
*dp
= container_of(rcu
, struct datapath
, rcu
);
164 ovs_flow_tbl_destroy(&dp
->table
);
165 free_percpu(dp
->stats_percpu
);
166 release_net(ovs_dp_get_net(dp
));
171 static struct hlist_head
*vport_hash_bucket(const struct datapath
*dp
,
174 return &dp
->ports
[port_no
& (DP_VPORT_HASH_BUCKETS
- 1)];
177 struct vport
*ovs_lookup_vport(const struct datapath
*dp
, u16 port_no
)
180 struct hlist_head
*head
;
182 head
= vport_hash_bucket(dp
, port_no
);
183 hlist_for_each_entry_rcu(vport
, head
, dp_hash_node
) {
184 if (vport
->port_no
== port_no
)
190 /* Called with ovs_mutex. */
191 static struct vport
*new_vport(const struct vport_parms
*parms
)
195 vport
= ovs_vport_add(parms
);
196 if (!IS_ERR(vport
)) {
197 struct datapath
*dp
= parms
->dp
;
198 struct hlist_head
*head
= vport_hash_bucket(dp
, vport
->port_no
);
200 hlist_add_head_rcu(&vport
->dp_hash_node
, head
);
205 void ovs_dp_detach_port(struct vport
*p
)
209 /* First drop references to device. */
210 hlist_del_rcu(&p
->dp_hash_node
);
212 /* Then destroy it. */
216 /* Must be called with rcu_read_lock. */
217 void ovs_dp_process_received_packet(struct vport
*p
, struct sk_buff
*skb
)
219 struct datapath
*dp
= p
->dp
;
220 struct sw_flow
*flow
;
221 struct dp_stats_percpu
*stats
;
222 struct sw_flow_key key
;
227 stats
= this_cpu_ptr(dp
->stats_percpu
);
229 /* Extract flow from 'skb' into 'key'. */
230 error
= ovs_flow_extract(skb
, p
->port_no
, &key
);
231 if (unlikely(error
)) {
237 flow
= ovs_flow_tbl_lookup(&dp
->table
, &key
, &n_mask_hit
);
238 if (unlikely(!flow
)) {
239 struct dp_upcall_info upcall
;
241 upcall
.cmd
= OVS_PACKET_CMD_MISS
;
243 upcall
.userdata
= NULL
;
244 upcall
.portid
= p
->upcall_portid
;
245 ovs_dp_upcall(dp
, skb
, &upcall
);
247 stats_counter
= &stats
->n_missed
;
251 OVS_CB(skb
)->flow
= flow
;
252 OVS_CB(skb
)->pkt_key
= &key
;
254 stats_counter
= &stats
->n_hit
;
255 ovs_flow_used(OVS_CB(skb
)->flow
, skb
);
256 ovs_execute_actions(dp
, skb
);
259 /* Update datapath statistics. */
260 u64_stats_update_begin(&stats
->sync
);
262 stats
->n_mask_hit
+= n_mask_hit
;
263 u64_stats_update_end(&stats
->sync
);
266 static struct genl_family dp_packet_genl_family
= {
267 .id
= GENL_ID_GENERATE
,
268 .hdrsize
= sizeof(struct ovs_header
),
269 .name
= OVS_PACKET_FAMILY
,
270 .version
= OVS_PACKET_VERSION
,
271 .maxattr
= OVS_PACKET_ATTR_MAX
,
273 .parallel_ops
= true,
276 int ovs_dp_upcall(struct datapath
*dp
, struct sk_buff
*skb
,
277 const struct dp_upcall_info
*upcall_info
)
279 struct dp_stats_percpu
*stats
;
283 if (upcall_info
->portid
== 0) {
288 dp_ifindex
= get_dpifindex(dp
);
294 if (!skb_is_gso(skb
))
295 err
= queue_userspace_packet(ovs_dp_get_net(dp
), dp_ifindex
, skb
, upcall_info
);
297 err
= queue_gso_packets(ovs_dp_get_net(dp
), dp_ifindex
, skb
, upcall_info
);
304 stats
= this_cpu_ptr(dp
->stats_percpu
);
306 u64_stats_update_begin(&stats
->sync
);
308 u64_stats_update_end(&stats
->sync
);
313 static int queue_gso_packets(struct net
*net
, int dp_ifindex
,
315 const struct dp_upcall_info
*upcall_info
)
317 unsigned short gso_type
= skb_shinfo(skb
)->gso_type
;
318 struct dp_upcall_info later_info
;
319 struct sw_flow_key later_key
;
320 struct sk_buff
*segs
, *nskb
;
323 segs
= __skb_gso_segment(skb
, NETIF_F_SG
| NETIF_F_HW_CSUM
, false);
325 return PTR_ERR(segs
);
327 /* Queue all of the segments. */
330 err
= queue_userspace_packet(net
, dp_ifindex
, skb
, upcall_info
);
334 if (skb
== segs
&& gso_type
& SKB_GSO_UDP
) {
335 /* The initial flow key extracted by ovs_flow_extract()
336 * in this case is for a first fragment, so we need to
337 * properly mark later fragments.
339 later_key
= *upcall_info
->key
;
340 later_key
.ip
.frag
= OVS_FRAG_TYPE_LATER
;
342 later_info
= *upcall_info
;
343 later_info
.key
= &later_key
;
344 upcall_info
= &later_info
;
346 } while ((skb
= skb
->next
));
348 /* Free all of the segments. */
356 } while ((skb
= nskb
));
360 static size_t key_attr_size(void)
362 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
363 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
364 + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
365 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */
366 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */
367 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
368 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
369 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
370 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
371 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
372 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
373 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
374 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
375 + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */
376 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
377 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
378 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
379 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
380 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
383 static size_t upcall_msg_size(const struct sk_buff
*skb
,
384 const struct nlattr
*userdata
)
386 size_t size
= NLMSG_ALIGN(sizeof(struct ovs_header
))
387 + nla_total_size(skb
->len
) /* OVS_PACKET_ATTR_PACKET */
388 + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */
390 /* OVS_PACKET_ATTR_USERDATA */
392 size
+= NLA_ALIGN(userdata
->nla_len
);
397 static int queue_userspace_packet(struct net
*net
, int dp_ifindex
,
399 const struct dp_upcall_info
*upcall_info
)
401 struct ovs_header
*upcall
;
402 struct sk_buff
*nskb
= NULL
;
403 struct sk_buff
*user_skb
; /* to be queued to userspace */
407 if (vlan_tx_tag_present(skb
)) {
408 nskb
= skb_clone(skb
, GFP_ATOMIC
);
412 nskb
= __vlan_put_tag(nskb
, nskb
->vlan_proto
, vlan_tx_tag_get(nskb
));
420 if (nla_attr_size(skb
->len
) > USHRT_MAX
) {
425 user_skb
= genlmsg_new(upcall_msg_size(skb
, upcall_info
->userdata
), GFP_ATOMIC
);
431 upcall
= genlmsg_put(user_skb
, 0, 0, &dp_packet_genl_family
,
432 0, upcall_info
->cmd
);
433 upcall
->dp_ifindex
= dp_ifindex
;
435 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_KEY
);
436 ovs_nla_put_flow(upcall_info
->key
, upcall_info
->key
, user_skb
);
437 nla_nest_end(user_skb
, nla
);
439 if (upcall_info
->userdata
)
440 __nla_put(user_skb
, OVS_PACKET_ATTR_USERDATA
,
441 nla_len(upcall_info
->userdata
),
442 nla_data(upcall_info
->userdata
));
444 nla
= __nla_reserve(user_skb
, OVS_PACKET_ATTR_PACKET
, skb
->len
);
446 skb_copy_and_csum_dev(skb
, nla_data(nla
));
448 genlmsg_end(user_skb
, upcall
);
449 err
= genlmsg_unicast(net
, user_skb
, upcall_info
->portid
);
456 static void clear_stats(struct sw_flow
*flow
)
460 flow
->packet_count
= 0;
461 flow
->byte_count
= 0;
464 static int ovs_packet_cmd_execute(struct sk_buff
*skb
, struct genl_info
*info
)
466 struct ovs_header
*ovs_header
= info
->userhdr
;
467 struct nlattr
**a
= info
->attrs
;
468 struct sw_flow_actions
*acts
;
469 struct sk_buff
*packet
;
470 struct sw_flow
*flow
;
477 if (!a
[OVS_PACKET_ATTR_PACKET
] || !a
[OVS_PACKET_ATTR_KEY
] ||
478 !a
[OVS_PACKET_ATTR_ACTIONS
])
481 len
= nla_len(a
[OVS_PACKET_ATTR_PACKET
]);
482 packet
= __dev_alloc_skb(NET_IP_ALIGN
+ len
, GFP_KERNEL
);
486 skb_reserve(packet
, NET_IP_ALIGN
);
488 nla_memcpy(__skb_put(packet
, len
), a
[OVS_PACKET_ATTR_PACKET
], len
);
490 skb_reset_mac_header(packet
);
491 eth
= eth_hdr(packet
);
493 /* Normally, setting the skb 'protocol' field would be handled by a
494 * call to eth_type_trans(), but it assumes there's a sending
495 * device, which we may not have. */
496 if (ntohs(eth
->h_proto
) >= ETH_P_802_3_MIN
)
497 packet
->protocol
= eth
->h_proto
;
499 packet
->protocol
= htons(ETH_P_802_2
);
501 /* Build an sw_flow for sending this packet. */
502 flow
= ovs_flow_alloc();
507 err
= ovs_flow_extract(packet
, -1, &flow
->key
);
511 err
= ovs_nla_get_flow_metadata(flow
, a
[OVS_PACKET_ATTR_KEY
]);
514 acts
= ovs_nla_alloc_flow_actions(nla_len(a
[OVS_PACKET_ATTR_ACTIONS
]));
519 err
= ovs_nla_copy_actions(a
[OVS_PACKET_ATTR_ACTIONS
],
520 &flow
->key
, 0, &acts
);
521 rcu_assign_pointer(flow
->sf_acts
, acts
);
525 OVS_CB(packet
)->flow
= flow
;
526 OVS_CB(packet
)->pkt_key
= &flow
->key
;
527 packet
->priority
= flow
->key
.phy
.priority
;
528 packet
->mark
= flow
->key
.phy
.skb_mark
;
531 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
537 err
= ovs_execute_actions(dp
, packet
);
541 ovs_flow_free(flow
, false);
547 ovs_flow_free(flow
, false);
554 static const struct nla_policy packet_policy
[OVS_PACKET_ATTR_MAX
+ 1] = {
555 [OVS_PACKET_ATTR_PACKET
] = { .len
= ETH_HLEN
},
556 [OVS_PACKET_ATTR_KEY
] = { .type
= NLA_NESTED
},
557 [OVS_PACKET_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
560 static const struct genl_ops dp_packet_genl_ops
[] = {
561 { .cmd
= OVS_PACKET_CMD_EXECUTE
,
562 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
563 .policy
= packet_policy
,
564 .doit
= ovs_packet_cmd_execute
568 static void get_dp_stats(struct datapath
*dp
, struct ovs_dp_stats
*stats
,
569 struct ovs_dp_megaflow_stats
*mega_stats
)
573 memset(mega_stats
, 0, sizeof(*mega_stats
));
575 stats
->n_flows
= ovs_flow_tbl_count(&dp
->table
);
576 mega_stats
->n_masks
= ovs_flow_tbl_num_masks(&dp
->table
);
578 stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
580 for_each_possible_cpu(i
) {
581 const struct dp_stats_percpu
*percpu_stats
;
582 struct dp_stats_percpu local_stats
;
585 percpu_stats
= per_cpu_ptr(dp
->stats_percpu
, i
);
588 start
= u64_stats_fetch_begin_bh(&percpu_stats
->sync
);
589 local_stats
= *percpu_stats
;
590 } while (u64_stats_fetch_retry_bh(&percpu_stats
->sync
, start
));
592 stats
->n_hit
+= local_stats
.n_hit
;
593 stats
->n_missed
+= local_stats
.n_missed
;
594 stats
->n_lost
+= local_stats
.n_lost
;
595 mega_stats
->n_mask_hit
+= local_stats
.n_mask_hit
;
599 static const struct nla_policy flow_policy
[OVS_FLOW_ATTR_MAX
+ 1] = {
600 [OVS_FLOW_ATTR_KEY
] = { .type
= NLA_NESTED
},
601 [OVS_FLOW_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
602 [OVS_FLOW_ATTR_CLEAR
] = { .type
= NLA_FLAG
},
605 static struct genl_family dp_flow_genl_family
= {
606 .id
= GENL_ID_GENERATE
,
607 .hdrsize
= sizeof(struct ovs_header
),
608 .name
= OVS_FLOW_FAMILY
,
609 .version
= OVS_FLOW_VERSION
,
610 .maxattr
= OVS_FLOW_ATTR_MAX
,
612 .parallel_ops
= true,
615 static struct genl_multicast_group ovs_dp_flow_multicast_group
= {
616 .name
= OVS_FLOW_MCGROUP
619 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions
*acts
)
621 return NLMSG_ALIGN(sizeof(struct ovs_header
))
622 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */
623 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */
624 + nla_total_size(sizeof(struct ovs_flow_stats
)) /* OVS_FLOW_ATTR_STATS */
625 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
626 + nla_total_size(8) /* OVS_FLOW_ATTR_USED */
627 + nla_total_size(acts
->actions_len
); /* OVS_FLOW_ATTR_ACTIONS */
630 /* Called with ovs_mutex. */
631 static int ovs_flow_cmd_fill_info(struct sw_flow
*flow
, struct datapath
*dp
,
632 struct sk_buff
*skb
, u32 portid
,
633 u32 seq
, u32 flags
, u8 cmd
)
635 const int skb_orig_len
= skb
->len
;
636 struct nlattr
*start
;
637 struct ovs_flow_stats stats
;
638 struct ovs_header
*ovs_header
;
644 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_flow_genl_family
, flags
, cmd
);
648 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
651 nla
= nla_nest_start(skb
, OVS_FLOW_ATTR_KEY
);
653 goto nla_put_failure
;
655 err
= ovs_nla_put_flow(&flow
->unmasked_key
, &flow
->unmasked_key
, skb
);
658 nla_nest_end(skb
, nla
);
660 nla
= nla_nest_start(skb
, OVS_FLOW_ATTR_MASK
);
662 goto nla_put_failure
;
664 err
= ovs_nla_put_flow(&flow
->key
, &flow
->mask
->key
, skb
);
668 nla_nest_end(skb
, nla
);
670 spin_lock_bh(&flow
->lock
);
672 stats
.n_packets
= flow
->packet_count
;
673 stats
.n_bytes
= flow
->byte_count
;
674 tcp_flags
= (u8
)ntohs(flow
->tcp_flags
);
675 spin_unlock_bh(&flow
->lock
);
678 nla_put_u64(skb
, OVS_FLOW_ATTR_USED
, ovs_flow_used_time(used
)))
679 goto nla_put_failure
;
681 if (stats
.n_packets
&&
682 nla_put(skb
, OVS_FLOW_ATTR_STATS
,
683 sizeof(struct ovs_flow_stats
), &stats
))
684 goto nla_put_failure
;
687 nla_put_u8(skb
, OVS_FLOW_ATTR_TCP_FLAGS
, tcp_flags
))
688 goto nla_put_failure
;
690 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
691 * this is the first flow to be dumped into 'skb'. This is unusual for
692 * Netlink but individual action lists can be longer than
693 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
694 * The userspace caller can always fetch the actions separately if it
695 * really wants them. (Most userspace callers in fact don't care.)
697 * This can only fail for dump operations because the skb is always
698 * properly sized for single flows.
700 start
= nla_nest_start(skb
, OVS_FLOW_ATTR_ACTIONS
);
702 const struct sw_flow_actions
*sf_acts
;
704 sf_acts
= rcu_dereference_check(flow
->sf_acts
,
705 lockdep_ovsl_is_held());
707 err
= ovs_nla_put_actions(sf_acts
->actions
,
708 sf_acts
->actions_len
, skb
);
710 nla_nest_end(skb
, start
);
715 nla_nest_cancel(skb
, start
);
717 } else if (skb_orig_len
)
718 goto nla_put_failure
;
720 return genlmsg_end(skb
, ovs_header
);
725 genlmsg_cancel(skb
, ovs_header
);
729 static struct sk_buff
*ovs_flow_cmd_alloc_info(struct sw_flow
*flow
)
731 const struct sw_flow_actions
*sf_acts
;
733 sf_acts
= ovsl_dereference(flow
->sf_acts
);
735 return genlmsg_new(ovs_flow_cmd_msg_size(sf_acts
), GFP_KERNEL
);
738 static struct sk_buff
*ovs_flow_cmd_build_info(struct sw_flow
*flow
,
740 u32 portid
, u32 seq
, u8 cmd
)
745 skb
= ovs_flow_cmd_alloc_info(flow
);
747 return ERR_PTR(-ENOMEM
);
749 retval
= ovs_flow_cmd_fill_info(flow
, dp
, skb
, portid
, seq
, 0, cmd
);
754 static struct sw_flow
*__ovs_flow_tbl_lookup(struct flow_table
*tbl
,
755 const struct sw_flow_key
*key
)
757 u32 __always_unused n_mask_hit
;
759 return ovs_flow_tbl_lookup(tbl
, key
, &n_mask_hit
);
762 static int ovs_flow_cmd_new_or_set(struct sk_buff
*skb
, struct genl_info
*info
)
764 struct nlattr
**a
= info
->attrs
;
765 struct ovs_header
*ovs_header
= info
->userhdr
;
766 struct sw_flow_key key
, masked_key
;
767 struct sw_flow
*flow
= NULL
;
768 struct sw_flow_mask mask
;
769 struct sk_buff
*reply
;
771 struct sw_flow_actions
*acts
= NULL
;
772 struct sw_flow_match match
;
777 if (!a
[OVS_FLOW_ATTR_KEY
])
780 ovs_match_init(&match
, &key
, &mask
);
781 error
= ovs_nla_get_match(&match
,
782 a
[OVS_FLOW_ATTR_KEY
], a
[OVS_FLOW_ATTR_MASK
]);
786 /* Validate actions. */
787 if (a
[OVS_FLOW_ATTR_ACTIONS
]) {
788 acts
= ovs_nla_alloc_flow_actions(nla_len(a
[OVS_FLOW_ATTR_ACTIONS
]));
789 error
= PTR_ERR(acts
);
793 ovs_flow_mask_key(&masked_key
, &key
, &mask
);
794 error
= ovs_nla_copy_actions(a
[OVS_FLOW_ATTR_ACTIONS
],
795 &masked_key
, 0, &acts
);
797 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
800 } else if (info
->genlhdr
->cmd
== OVS_FLOW_CMD_NEW
) {
806 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
811 /* Check if this is a duplicate flow */
812 flow
= __ovs_flow_tbl_lookup(&dp
->table
, &key
);
814 /* Bail out if we're not allowed to create a new flow. */
816 if (info
->genlhdr
->cmd
== OVS_FLOW_CMD_SET
)
820 flow
= ovs_flow_alloc();
822 error
= PTR_ERR(flow
);
827 flow
->key
= masked_key
;
828 flow
->unmasked_key
= key
;
829 rcu_assign_pointer(flow
->sf_acts
, acts
);
831 /* Put flow in bucket. */
832 error
= ovs_flow_tbl_insert(&dp
->table
, flow
, &mask
);
838 reply
= ovs_flow_cmd_build_info(flow
, dp
, info
->snd_portid
,
839 info
->snd_seq
, OVS_FLOW_CMD_NEW
);
841 /* We found a matching flow. */
842 struct sw_flow_actions
*old_acts
;
844 /* Bail out if we're not allowed to modify an existing flow.
845 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
846 * because Generic Netlink treats the latter as a dump
847 * request. We also accept NLM_F_EXCL in case that bug ever
851 if (info
->genlhdr
->cmd
== OVS_FLOW_CMD_NEW
&&
852 info
->nlhdr
->nlmsg_flags
& (NLM_F_CREATE
| NLM_F_EXCL
))
855 /* The unmasked key has to be the same for flow updates. */
857 if (!ovs_flow_cmp_unmasked_key(flow
, &match
)) {
858 OVS_NLERR("Flow modification message rejected, unmasked key does not match.\n");
862 /* Update actions. */
863 old_acts
= ovsl_dereference(flow
->sf_acts
);
864 rcu_assign_pointer(flow
->sf_acts
, acts
);
865 ovs_nla_free_flow_actions(old_acts
);
867 reply
= ovs_flow_cmd_build_info(flow
, dp
, info
->snd_portid
,
868 info
->snd_seq
, OVS_FLOW_CMD_NEW
);
871 if (a
[OVS_FLOW_ATTR_CLEAR
]) {
872 spin_lock_bh(&flow
->lock
);
874 spin_unlock_bh(&flow
->lock
);
880 ovs_notify(reply
, info
, &ovs_dp_flow_multicast_group
);
882 netlink_set_err(sock_net(skb
->sk
)->genl_sock
, 0,
883 ovs_dp_flow_multicast_group
.id
, PTR_ERR(reply
));
887 ovs_flow_free(flow
, false);
896 static int ovs_flow_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
898 struct nlattr
**a
= info
->attrs
;
899 struct ovs_header
*ovs_header
= info
->userhdr
;
900 struct sw_flow_key key
;
901 struct sk_buff
*reply
;
902 struct sw_flow
*flow
;
904 struct sw_flow_match match
;
907 if (!a
[OVS_FLOW_ATTR_KEY
]) {
908 OVS_NLERR("Flow get message rejected, Key attribute missing.\n");
912 ovs_match_init(&match
, &key
, NULL
);
913 err
= ovs_nla_get_match(&match
, a
[OVS_FLOW_ATTR_KEY
], NULL
);
918 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
924 flow
= __ovs_flow_tbl_lookup(&dp
->table
, &key
);
925 if (!flow
|| !ovs_flow_cmp_unmasked_key(flow
, &match
)) {
930 reply
= ovs_flow_cmd_build_info(flow
, dp
, info
->snd_portid
,
931 info
->snd_seq
, OVS_FLOW_CMD_NEW
);
933 err
= PTR_ERR(reply
);
938 return genlmsg_reply(reply
, info
);
944 static int ovs_flow_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
946 struct nlattr
**a
= info
->attrs
;
947 struct ovs_header
*ovs_header
= info
->userhdr
;
948 struct sw_flow_key key
;
949 struct sk_buff
*reply
;
950 struct sw_flow
*flow
;
952 struct sw_flow_match match
;
956 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
962 if (!a
[OVS_FLOW_ATTR_KEY
]) {
963 err
= ovs_flow_tbl_flush(&dp
->table
);
967 ovs_match_init(&match
, &key
, NULL
);
968 err
= ovs_nla_get_match(&match
, a
[OVS_FLOW_ATTR_KEY
], NULL
);
972 flow
= __ovs_flow_tbl_lookup(&dp
->table
, &key
);
973 if (!flow
|| !ovs_flow_cmp_unmasked_key(flow
, &match
)) {
978 reply
= ovs_flow_cmd_alloc_info(flow
);
984 ovs_flow_tbl_remove(&dp
->table
, flow
);
986 err
= ovs_flow_cmd_fill_info(flow
, dp
, reply
, info
->snd_portid
,
987 info
->snd_seq
, 0, OVS_FLOW_CMD_DEL
);
990 ovs_flow_free(flow
, true);
993 ovs_notify(reply
, info
, &ovs_dp_flow_multicast_group
);
1000 static int ovs_flow_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1002 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1003 struct table_instance
*ti
;
1004 struct datapath
*dp
;
1007 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1013 ti
= rcu_dereference(dp
->table
.ti
);
1015 struct sw_flow
*flow
;
1018 bucket
= cb
->args
[0];
1020 flow
= ovs_flow_tbl_dump_next(ti
, &bucket
, &obj
);
1024 if (ovs_flow_cmd_fill_info(flow
, dp
, skb
,
1025 NETLINK_CB(cb
->skb
).portid
,
1026 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1027 OVS_FLOW_CMD_NEW
) < 0)
1030 cb
->args
[0] = bucket
;
1037 static const struct genl_ops dp_flow_genl_ops
[] = {
1038 { .cmd
= OVS_FLOW_CMD_NEW
,
1039 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1040 .policy
= flow_policy
,
1041 .doit
= ovs_flow_cmd_new_or_set
1043 { .cmd
= OVS_FLOW_CMD_DEL
,
1044 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1045 .policy
= flow_policy
,
1046 .doit
= ovs_flow_cmd_del
1048 { .cmd
= OVS_FLOW_CMD_GET
,
1049 .flags
= 0, /* OK for unprivileged users. */
1050 .policy
= flow_policy
,
1051 .doit
= ovs_flow_cmd_get
,
1052 .dumpit
= ovs_flow_cmd_dump
1054 { .cmd
= OVS_FLOW_CMD_SET
,
1055 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1056 .policy
= flow_policy
,
1057 .doit
= ovs_flow_cmd_new_or_set
,
1061 static const struct nla_policy datapath_policy
[OVS_DP_ATTR_MAX
+ 1] = {
1062 [OVS_DP_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1063 [OVS_DP_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1066 static struct genl_family dp_datapath_genl_family
= {
1067 .id
= GENL_ID_GENERATE
,
1068 .hdrsize
= sizeof(struct ovs_header
),
1069 .name
= OVS_DATAPATH_FAMILY
,
1070 .version
= OVS_DATAPATH_VERSION
,
1071 .maxattr
= OVS_DP_ATTR_MAX
,
1073 .parallel_ops
= true,
1076 static struct genl_multicast_group ovs_dp_datapath_multicast_group
= {
1077 .name
= OVS_DATAPATH_MCGROUP
1080 static size_t ovs_dp_cmd_msg_size(void)
1082 size_t msgsize
= NLMSG_ALIGN(sizeof(struct ovs_header
));
1084 msgsize
+= nla_total_size(IFNAMSIZ
);
1085 msgsize
+= nla_total_size(sizeof(struct ovs_dp_stats
));
1086 msgsize
+= nla_total_size(sizeof(struct ovs_dp_megaflow_stats
));
1091 static int ovs_dp_cmd_fill_info(struct datapath
*dp
, struct sk_buff
*skb
,
1092 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1094 struct ovs_header
*ovs_header
;
1095 struct ovs_dp_stats dp_stats
;
1096 struct ovs_dp_megaflow_stats dp_megaflow_stats
;
1099 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_datapath_genl_family
,
1104 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
1107 err
= nla_put_string(skb
, OVS_DP_ATTR_NAME
, ovs_dp_name(dp
));
1110 goto nla_put_failure
;
1112 get_dp_stats(dp
, &dp_stats
, &dp_megaflow_stats
);
1113 if (nla_put(skb
, OVS_DP_ATTR_STATS
, sizeof(struct ovs_dp_stats
),
1115 goto nla_put_failure
;
1117 if (nla_put(skb
, OVS_DP_ATTR_MEGAFLOW_STATS
,
1118 sizeof(struct ovs_dp_megaflow_stats
),
1119 &dp_megaflow_stats
))
1120 goto nla_put_failure
;
1122 return genlmsg_end(skb
, ovs_header
);
1125 genlmsg_cancel(skb
, ovs_header
);
1130 static struct sk_buff
*ovs_dp_cmd_build_info(struct datapath
*dp
, u32 portid
,
1133 struct sk_buff
*skb
;
1136 skb
= genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL
);
1138 return ERR_PTR(-ENOMEM
);
1140 retval
= ovs_dp_cmd_fill_info(dp
, skb
, portid
, seq
, 0, cmd
);
1143 return ERR_PTR(retval
);
1148 /* Called with ovs_mutex. */
1149 static struct datapath
*lookup_datapath(struct net
*net
,
1150 struct ovs_header
*ovs_header
,
1151 struct nlattr
*a
[OVS_DP_ATTR_MAX
+ 1])
1153 struct datapath
*dp
;
1155 if (!a
[OVS_DP_ATTR_NAME
])
1156 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1158 struct vport
*vport
;
1161 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_DP_ATTR_NAME
]));
1162 dp
= vport
&& vport
->port_no
== OVSP_LOCAL
? vport
->dp
: NULL
;
1165 return dp
? dp
: ERR_PTR(-ENODEV
);
1168 static int ovs_dp_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1170 struct nlattr
**a
= info
->attrs
;
1171 struct vport_parms parms
;
1172 struct sk_buff
*reply
;
1173 struct datapath
*dp
;
1174 struct vport
*vport
;
1175 struct ovs_net
*ovs_net
;
1179 if (!a
[OVS_DP_ATTR_NAME
] || !a
[OVS_DP_ATTR_UPCALL_PID
])
1185 dp
= kzalloc(sizeof(*dp
), GFP_KERNEL
);
1187 goto err_unlock_ovs
;
1189 ovs_dp_set_net(dp
, hold_net(sock_net(skb
->sk
)));
1191 /* Allocate table. */
1192 err
= ovs_flow_tbl_init(&dp
->table
);
1196 dp
->stats_percpu
= alloc_percpu(struct dp_stats_percpu
);
1197 if (!dp
->stats_percpu
) {
1199 goto err_destroy_table
;
1202 dp
->ports
= kmalloc(DP_VPORT_HASH_BUCKETS
* sizeof(struct hlist_head
),
1206 goto err_destroy_percpu
;
1209 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1210 INIT_HLIST_HEAD(&dp
->ports
[i
]);
1212 /* Set up our datapath device. */
1213 parms
.name
= nla_data(a
[OVS_DP_ATTR_NAME
]);
1214 parms
.type
= OVS_VPORT_TYPE_INTERNAL
;
1215 parms
.options
= NULL
;
1217 parms
.port_no
= OVSP_LOCAL
;
1218 parms
.upcall_portid
= nla_get_u32(a
[OVS_DP_ATTR_UPCALL_PID
]);
1220 vport
= new_vport(&parms
);
1221 if (IS_ERR(vport
)) {
1222 err
= PTR_ERR(vport
);
1226 goto err_destroy_ports_array
;
1229 reply
= ovs_dp_cmd_build_info(dp
, info
->snd_portid
,
1230 info
->snd_seq
, OVS_DP_CMD_NEW
);
1231 err
= PTR_ERR(reply
);
1233 goto err_destroy_local_port
;
1235 ovs_net
= net_generic(ovs_dp_get_net(dp
), ovs_net_id
);
1236 list_add_tail_rcu(&dp
->list_node
, &ovs_net
->dps
);
1240 ovs_notify(reply
, info
, &ovs_dp_datapath_multicast_group
);
1243 err_destroy_local_port
:
1244 ovs_dp_detach_port(ovs_vport_ovsl(dp
, OVSP_LOCAL
));
1245 err_destroy_ports_array
:
1248 free_percpu(dp
->stats_percpu
);
1250 ovs_flow_tbl_destroy(&dp
->table
);
1252 release_net(ovs_dp_get_net(dp
));
1260 /* Called with ovs_mutex. */
1261 static void __dp_destroy(struct datapath
*dp
)
1265 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1266 struct vport
*vport
;
1267 struct hlist_node
*n
;
1269 hlist_for_each_entry_safe(vport
, n
, &dp
->ports
[i
], dp_hash_node
)
1270 if (vport
->port_no
!= OVSP_LOCAL
)
1271 ovs_dp_detach_port(vport
);
1274 list_del_rcu(&dp
->list_node
);
1276 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1277 * all port in datapath are destroyed first before freeing datapath.
1279 ovs_dp_detach_port(ovs_vport_ovsl(dp
, OVSP_LOCAL
));
1281 call_rcu(&dp
->rcu
, destroy_dp_rcu
);
1284 static int ovs_dp_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1286 struct sk_buff
*reply
;
1287 struct datapath
*dp
;
1291 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1296 reply
= ovs_dp_cmd_build_info(dp
, info
->snd_portid
,
1297 info
->snd_seq
, OVS_DP_CMD_DEL
);
1298 err
= PTR_ERR(reply
);
1305 ovs_notify(reply
, info
, &ovs_dp_datapath_multicast_group
);
1313 static int ovs_dp_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1315 struct sk_buff
*reply
;
1316 struct datapath
*dp
;
1320 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1325 reply
= ovs_dp_cmd_build_info(dp
, info
->snd_portid
,
1326 info
->snd_seq
, OVS_DP_CMD_NEW
);
1327 if (IS_ERR(reply
)) {
1328 err
= PTR_ERR(reply
);
1329 netlink_set_err(sock_net(skb
->sk
)->genl_sock
, 0,
1330 ovs_dp_datapath_multicast_group
.id
, err
);
1336 ovs_notify(reply
, info
, &ovs_dp_datapath_multicast_group
);
1344 static int ovs_dp_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1346 struct sk_buff
*reply
;
1347 struct datapath
*dp
;
1351 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1357 reply
= ovs_dp_cmd_build_info(dp
, info
->snd_portid
,
1358 info
->snd_seq
, OVS_DP_CMD_NEW
);
1359 if (IS_ERR(reply
)) {
1360 err
= PTR_ERR(reply
);
1365 return genlmsg_reply(reply
, info
);
1372 static int ovs_dp_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1374 struct ovs_net
*ovs_net
= net_generic(sock_net(skb
->sk
), ovs_net_id
);
1375 struct datapath
*dp
;
1376 int skip
= cb
->args
[0];
1380 list_for_each_entry_rcu(dp
, &ovs_net
->dps
, list_node
) {
1382 ovs_dp_cmd_fill_info(dp
, skb
, NETLINK_CB(cb
->skb
).portid
,
1383 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1384 OVS_DP_CMD_NEW
) < 0)
1395 static const struct genl_ops dp_datapath_genl_ops
[] = {
1396 { .cmd
= OVS_DP_CMD_NEW
,
1397 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1398 .policy
= datapath_policy
,
1399 .doit
= ovs_dp_cmd_new
1401 { .cmd
= OVS_DP_CMD_DEL
,
1402 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1403 .policy
= datapath_policy
,
1404 .doit
= ovs_dp_cmd_del
1406 { .cmd
= OVS_DP_CMD_GET
,
1407 .flags
= 0, /* OK for unprivileged users. */
1408 .policy
= datapath_policy
,
1409 .doit
= ovs_dp_cmd_get
,
1410 .dumpit
= ovs_dp_cmd_dump
1412 { .cmd
= OVS_DP_CMD_SET
,
1413 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1414 .policy
= datapath_policy
,
1415 .doit
= ovs_dp_cmd_set
,
1419 static const struct nla_policy vport_policy
[OVS_VPORT_ATTR_MAX
+ 1] = {
1420 [OVS_VPORT_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1421 [OVS_VPORT_ATTR_STATS
] = { .len
= sizeof(struct ovs_vport_stats
) },
1422 [OVS_VPORT_ATTR_PORT_NO
] = { .type
= NLA_U32
},
1423 [OVS_VPORT_ATTR_TYPE
] = { .type
= NLA_U32
},
1424 [OVS_VPORT_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1425 [OVS_VPORT_ATTR_OPTIONS
] = { .type
= NLA_NESTED
},
1428 static struct genl_family dp_vport_genl_family
= {
1429 .id
= GENL_ID_GENERATE
,
1430 .hdrsize
= sizeof(struct ovs_header
),
1431 .name
= OVS_VPORT_FAMILY
,
1432 .version
= OVS_VPORT_VERSION
,
1433 .maxattr
= OVS_VPORT_ATTR_MAX
,
1435 .parallel_ops
= true,
1438 struct genl_multicast_group ovs_dp_vport_multicast_group
= {
1439 .name
= OVS_VPORT_MCGROUP
1442 /* Called with ovs_mutex or RCU read lock. */
1443 static int ovs_vport_cmd_fill_info(struct vport
*vport
, struct sk_buff
*skb
,
1444 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1446 struct ovs_header
*ovs_header
;
1447 struct ovs_vport_stats vport_stats
;
1450 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_vport_genl_family
,
1455 ovs_header
->dp_ifindex
= get_dpifindex(vport
->dp
);
1457 if (nla_put_u32(skb
, OVS_VPORT_ATTR_PORT_NO
, vport
->port_no
) ||
1458 nla_put_u32(skb
, OVS_VPORT_ATTR_TYPE
, vport
->ops
->type
) ||
1459 nla_put_string(skb
, OVS_VPORT_ATTR_NAME
, vport
->ops
->get_name(vport
)) ||
1460 nla_put_u32(skb
, OVS_VPORT_ATTR_UPCALL_PID
, vport
->upcall_portid
))
1461 goto nla_put_failure
;
1463 ovs_vport_get_stats(vport
, &vport_stats
);
1464 if (nla_put(skb
, OVS_VPORT_ATTR_STATS
, sizeof(struct ovs_vport_stats
),
1466 goto nla_put_failure
;
1468 err
= ovs_vport_get_options(vport
, skb
);
1469 if (err
== -EMSGSIZE
)
1472 return genlmsg_end(skb
, ovs_header
);
1477 genlmsg_cancel(skb
, ovs_header
);
1481 /* Called with ovs_mutex or RCU read lock. */
1482 struct sk_buff
*ovs_vport_cmd_build_info(struct vport
*vport
, u32 portid
,
1485 struct sk_buff
*skb
;
1488 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
1490 return ERR_PTR(-ENOMEM
);
1492 retval
= ovs_vport_cmd_fill_info(vport
, skb
, portid
, seq
, 0, cmd
);
1498 /* Called with ovs_mutex or RCU read lock. */
1499 static struct vport
*lookup_vport(struct net
*net
,
1500 struct ovs_header
*ovs_header
,
1501 struct nlattr
*a
[OVS_VPORT_ATTR_MAX
+ 1])
1503 struct datapath
*dp
;
1504 struct vport
*vport
;
1506 if (a
[OVS_VPORT_ATTR_NAME
]) {
1507 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_VPORT_ATTR_NAME
]));
1509 return ERR_PTR(-ENODEV
);
1510 if (ovs_header
->dp_ifindex
&&
1511 ovs_header
->dp_ifindex
!= get_dpifindex(vport
->dp
))
1512 return ERR_PTR(-ENODEV
);
1514 } else if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
1515 u32 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1517 if (port_no
>= DP_MAX_PORTS
)
1518 return ERR_PTR(-EFBIG
);
1520 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1522 return ERR_PTR(-ENODEV
);
1524 vport
= ovs_vport_ovsl_rcu(dp
, port_no
);
1526 return ERR_PTR(-ENODEV
);
1529 return ERR_PTR(-EINVAL
);
1532 static int ovs_vport_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1534 struct nlattr
**a
= info
->attrs
;
1535 struct ovs_header
*ovs_header
= info
->userhdr
;
1536 struct vport_parms parms
;
1537 struct sk_buff
*reply
;
1538 struct vport
*vport
;
1539 struct datapath
*dp
;
1544 if (!a
[OVS_VPORT_ATTR_NAME
] || !a
[OVS_VPORT_ATTR_TYPE
] ||
1545 !a
[OVS_VPORT_ATTR_UPCALL_PID
])
1549 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1554 if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
1555 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1558 if (port_no
>= DP_MAX_PORTS
)
1561 vport
= ovs_vport_ovsl(dp
, port_no
);
1566 for (port_no
= 1; ; port_no
++) {
1567 if (port_no
>= DP_MAX_PORTS
) {
1571 vport
= ovs_vport_ovsl(dp
, port_no
);
1577 parms
.name
= nla_data(a
[OVS_VPORT_ATTR_NAME
]);
1578 parms
.type
= nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]);
1579 parms
.options
= a
[OVS_VPORT_ATTR_OPTIONS
];
1581 parms
.port_no
= port_no
;
1582 parms
.upcall_portid
= nla_get_u32(a
[OVS_VPORT_ATTR_UPCALL_PID
]);
1584 vport
= new_vport(&parms
);
1585 err
= PTR_ERR(vport
);
1590 reply
= ovs_vport_cmd_build_info(vport
, info
->snd_portid
, info
->snd_seq
,
1592 if (IS_ERR(reply
)) {
1593 err
= PTR_ERR(reply
);
1594 ovs_dp_detach_port(vport
);
1598 ovs_notify(reply
, info
, &ovs_dp_vport_multicast_group
);
1606 static int ovs_vport_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1608 struct nlattr
**a
= info
->attrs
;
1609 struct sk_buff
*reply
;
1610 struct vport
*vport
;
1614 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
1615 err
= PTR_ERR(vport
);
1619 if (a
[OVS_VPORT_ATTR_TYPE
] &&
1620 nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]) != vport
->ops
->type
) {
1625 reply
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1631 if (a
[OVS_VPORT_ATTR_OPTIONS
]) {
1632 err
= ovs_vport_set_options(vport
, a
[OVS_VPORT_ATTR_OPTIONS
]);
1637 if (a
[OVS_VPORT_ATTR_UPCALL_PID
])
1638 vport
->upcall_portid
= nla_get_u32(a
[OVS_VPORT_ATTR_UPCALL_PID
]);
1640 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
1641 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
1645 ovs_notify(reply
, info
, &ovs_dp_vport_multicast_group
);
1655 static int ovs_vport_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1657 struct nlattr
**a
= info
->attrs
;
1658 struct sk_buff
*reply
;
1659 struct vport
*vport
;
1663 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
1664 err
= PTR_ERR(vport
);
1668 if (vport
->port_no
== OVSP_LOCAL
) {
1673 reply
= ovs_vport_cmd_build_info(vport
, info
->snd_portid
,
1674 info
->snd_seq
, OVS_VPORT_CMD_DEL
);
1675 err
= PTR_ERR(reply
);
1680 ovs_dp_detach_port(vport
);
1682 ovs_notify(reply
, info
, &ovs_dp_vport_multicast_group
);
1689 static int ovs_vport_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1691 struct nlattr
**a
= info
->attrs
;
1692 struct ovs_header
*ovs_header
= info
->userhdr
;
1693 struct sk_buff
*reply
;
1694 struct vport
*vport
;
1698 vport
= lookup_vport(sock_net(skb
->sk
), ovs_header
, a
);
1699 err
= PTR_ERR(vport
);
1703 reply
= ovs_vport_cmd_build_info(vport
, info
->snd_portid
,
1704 info
->snd_seq
, OVS_VPORT_CMD_NEW
);
1705 err
= PTR_ERR(reply
);
1711 return genlmsg_reply(reply
, info
);
1718 static int ovs_vport_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1720 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1721 struct datapath
*dp
;
1722 int bucket
= cb
->args
[0], skip
= cb
->args
[1];
1725 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1730 for (i
= bucket
; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1731 struct vport
*vport
;
1734 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
1736 ovs_vport_cmd_fill_info(vport
, skb
,
1737 NETLINK_CB(cb
->skb
).portid
,
1740 OVS_VPORT_CMD_NEW
) < 0)
1756 static const struct genl_ops dp_vport_genl_ops
[] = {
1757 { .cmd
= OVS_VPORT_CMD_NEW
,
1758 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1759 .policy
= vport_policy
,
1760 .doit
= ovs_vport_cmd_new
1762 { .cmd
= OVS_VPORT_CMD_DEL
,
1763 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1764 .policy
= vport_policy
,
1765 .doit
= ovs_vport_cmd_del
1767 { .cmd
= OVS_VPORT_CMD_GET
,
1768 .flags
= 0, /* OK for unprivileged users. */
1769 .policy
= vport_policy
,
1770 .doit
= ovs_vport_cmd_get
,
1771 .dumpit
= ovs_vport_cmd_dump
1773 { .cmd
= OVS_VPORT_CMD_SET
,
1774 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1775 .policy
= vport_policy
,
1776 .doit
= ovs_vport_cmd_set
,
1780 struct genl_family_and_ops
{
1781 struct genl_family
*family
;
1782 const struct genl_ops
*ops
;
1784 struct genl_multicast_group
*group
;
1787 static const struct genl_family_and_ops dp_genl_families
[] = {
1788 { &dp_datapath_genl_family
,
1789 dp_datapath_genl_ops
, ARRAY_SIZE(dp_datapath_genl_ops
),
1790 &ovs_dp_datapath_multicast_group
},
1791 { &dp_vport_genl_family
,
1792 dp_vport_genl_ops
, ARRAY_SIZE(dp_vport_genl_ops
),
1793 &ovs_dp_vport_multicast_group
},
1794 { &dp_flow_genl_family
,
1795 dp_flow_genl_ops
, ARRAY_SIZE(dp_flow_genl_ops
),
1796 &ovs_dp_flow_multicast_group
},
1797 { &dp_packet_genl_family
,
1798 dp_packet_genl_ops
, ARRAY_SIZE(dp_packet_genl_ops
),
1802 static void dp_unregister_genl(int n_families
)
1806 for (i
= 0; i
< n_families
; i
++)
1807 genl_unregister_family(dp_genl_families
[i
].family
);
1810 static int dp_register_genl(void)
1817 for (i
= 0; i
< ARRAY_SIZE(dp_genl_families
); i
++) {
1818 const struct genl_family_and_ops
*f
= &dp_genl_families
[i
];
1820 f
->family
->ops
= f
->ops
;
1821 f
->family
->n_ops
= f
->n_ops
;
1822 err
= genl_register_family(f
->family
);
1828 err
= genl_register_mc_group(f
->family
, f
->group
);
1837 dp_unregister_genl(n_registered
);
1841 static int __net_init
ovs_init_net(struct net
*net
)
1843 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
1845 INIT_LIST_HEAD(&ovs_net
->dps
);
1846 INIT_WORK(&ovs_net
->dp_notify_work
, ovs_dp_notify_wq
);
1850 static void __net_exit
ovs_exit_net(struct net
*net
)
1852 struct datapath
*dp
, *dp_next
;
1853 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
1856 list_for_each_entry_safe(dp
, dp_next
, &ovs_net
->dps
, list_node
)
1860 cancel_work_sync(&ovs_net
->dp_notify_work
);
1863 static struct pernet_operations ovs_net_ops
= {
1864 .init
= ovs_init_net
,
1865 .exit
= ovs_exit_net
,
1867 .size
= sizeof(struct ovs_net
),
1870 static int __init
dp_init(void)
1874 BUILD_BUG_ON(sizeof(struct ovs_skb_cb
) > FIELD_SIZEOF(struct sk_buff
, cb
));
1876 pr_info("Open vSwitch switching datapath\n");
1878 err
= ovs_flow_init();
1882 err
= ovs_vport_init();
1884 goto error_flow_exit
;
1886 err
= register_pernet_device(&ovs_net_ops
);
1888 goto error_vport_exit
;
1890 err
= register_netdevice_notifier(&ovs_dp_device_notifier
);
1892 goto error_netns_exit
;
1894 err
= dp_register_genl();
1896 goto error_unreg_notifier
;
1900 error_unreg_notifier
:
1901 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
1903 unregister_pernet_device(&ovs_net_ops
);
1912 static void dp_cleanup(void)
1914 dp_unregister_genl(ARRAY_SIZE(dp_genl_families
));
1915 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
1916 unregister_pernet_device(&ovs_net_ops
);
1922 module_init(dp_init
);
1923 module_exit(dp_cleanup
);
1925 MODULE_DESCRIPTION("Open vSwitch switching datapath");
1926 MODULE_LICENSE("GPL");