2 * Copyright (c) 2007-2012 Nicira Networks.
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/system.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 <linux/workqueue.h>
52 #include <net/genetlink.h>
56 #include "vport-internal_dev.h"
61 * Writes to device state (add/remove datapath, port, set operations on vports,
62 * etc.) are protected by RTNL.
64 * Writes to other state (flow table modifications, set miscellaneous datapath
65 * parameters, etc.) are protected by genl_mutex. The RTNL lock nests inside
68 * Reads are protected by RCU.
70 * There are a few special cases (mostly stats) that have their own
71 * synchronization but they nest under all of above and don't interact with
75 /* Global list of datapaths to enable dumping them all out.
76 * Protected by genl_mutex.
78 static LIST_HEAD(dps
);
80 #define REHASH_FLOW_INTERVAL (10 * 60 * HZ)
81 static void rehash_flow_table(struct work_struct
*work
);
82 static DECLARE_DELAYED_WORK(rehash_flow_wq
, rehash_flow_table
);
84 static struct vport
*new_vport(const struct vport_parms
*);
85 static int queue_gso_packets(int dp_ifindex
, struct sk_buff
*,
86 const struct dp_upcall_info
*);
87 static int queue_userspace_packet(int dp_ifindex
, struct sk_buff
*,
88 const struct dp_upcall_info
*);
90 /* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */
91 static struct datapath
*get_dp(int dp_ifindex
)
93 struct datapath
*dp
= NULL
;
94 struct net_device
*dev
;
97 dev
= dev_get_by_index_rcu(&init_net
, dp_ifindex
);
99 struct vport
*vport
= ovs_internal_dev_get_vport(dev
);
108 /* Must be called with rcu_read_lock or RTNL lock. */
109 const char *ovs_dp_name(const struct datapath
*dp
)
111 struct vport
*vport
= rcu_dereference_rtnl(dp
->ports
[OVSP_LOCAL
]);
112 return vport
->ops
->get_name(vport
);
115 static int get_dpifindex(struct datapath
*dp
)
122 local
= rcu_dereference(dp
->ports
[OVSP_LOCAL
]);
124 ifindex
= local
->ops
->get_ifindex(local
);
133 static void destroy_dp_rcu(struct rcu_head
*rcu
)
135 struct datapath
*dp
= container_of(rcu
, struct datapath
, rcu
);
137 ovs_flow_tbl_destroy((__force
struct flow_table
*)dp
->table
);
138 free_percpu(dp
->stats_percpu
);
142 /* Called with RTNL lock and genl_lock. */
143 static struct vport
*new_vport(const struct vport_parms
*parms
)
147 vport
= ovs_vport_add(parms
);
148 if (!IS_ERR(vport
)) {
149 struct datapath
*dp
= parms
->dp
;
151 rcu_assign_pointer(dp
->ports
[parms
->port_no
], vport
);
152 list_add(&vport
->node
, &dp
->port_list
);
158 /* Called with RTNL lock. */
159 void ovs_dp_detach_port(struct vport
*p
)
163 /* First drop references to device. */
165 rcu_assign_pointer(p
->dp
->ports
[p
->port_no
], NULL
);
167 /* Then destroy it. */
171 /* Must be called with rcu_read_lock. */
172 void ovs_dp_process_received_packet(struct vport
*p
, struct sk_buff
*skb
)
174 struct datapath
*dp
= p
->dp
;
175 struct sw_flow
*flow
;
176 struct dp_stats_percpu
*stats
;
177 struct sw_flow_key key
;
182 stats
= per_cpu_ptr(dp
->stats_percpu
, smp_processor_id());
184 /* Extract flow from 'skb' into 'key'. */
185 error
= ovs_flow_extract(skb
, p
->port_no
, &key
, &key_len
);
186 if (unlikely(error
)) {
192 flow
= ovs_flow_tbl_lookup(rcu_dereference(dp
->table
), &key
, key_len
);
193 if (unlikely(!flow
)) {
194 struct dp_upcall_info upcall
;
196 upcall
.cmd
= OVS_PACKET_CMD_MISS
;
198 upcall
.userdata
= NULL
;
199 upcall
.pid
= p
->upcall_pid
;
200 ovs_dp_upcall(dp
, skb
, &upcall
);
202 stats_counter
= &stats
->n_missed
;
206 OVS_CB(skb
)->flow
= flow
;
208 stats_counter
= &stats
->n_hit
;
209 ovs_flow_used(OVS_CB(skb
)->flow
, skb
);
210 ovs_execute_actions(dp
, skb
);
213 /* Update datapath statistics. */
214 u64_stats_update_begin(&stats
->sync
);
216 u64_stats_update_end(&stats
->sync
);
219 static struct genl_family dp_packet_genl_family
= {
220 .id
= GENL_ID_GENERATE
,
221 .hdrsize
= sizeof(struct ovs_header
),
222 .name
= OVS_PACKET_FAMILY
,
223 .version
= OVS_PACKET_VERSION
,
224 .maxattr
= OVS_PACKET_ATTR_MAX
227 int ovs_dp_upcall(struct datapath
*dp
, struct sk_buff
*skb
,
228 const struct dp_upcall_info
*upcall_info
)
230 struct dp_stats_percpu
*stats
;
234 if (upcall_info
->pid
== 0) {
239 dp_ifindex
= get_dpifindex(dp
);
245 if (!skb_is_gso(skb
))
246 err
= queue_userspace_packet(dp_ifindex
, skb
, upcall_info
);
248 err
= queue_gso_packets(dp_ifindex
, skb
, upcall_info
);
255 stats
= per_cpu_ptr(dp
->stats_percpu
, smp_processor_id());
257 u64_stats_update_begin(&stats
->sync
);
259 u64_stats_update_end(&stats
->sync
);
264 static int queue_gso_packets(int dp_ifindex
, struct sk_buff
*skb
,
265 const struct dp_upcall_info
*upcall_info
)
267 struct dp_upcall_info later_info
;
268 struct sw_flow_key later_key
;
269 struct sk_buff
*segs
, *nskb
;
272 segs
= skb_gso_segment(skb
, NETIF_F_SG
| NETIF_F_HW_CSUM
);
276 /* Queue all of the segments. */
279 err
= queue_userspace_packet(dp_ifindex
, skb
, upcall_info
);
283 if (skb
== segs
&& skb_shinfo(skb
)->gso_type
& SKB_GSO_UDP
) {
284 /* The initial flow key extracted by ovs_flow_extract()
285 * in this case is for a first fragment, so we need to
286 * properly mark later fragments.
288 later_key
= *upcall_info
->key
;
289 later_key
.ip
.frag
= OVS_FRAG_TYPE_LATER
;
291 later_info
= *upcall_info
;
292 later_info
.key
= &later_key
;
293 upcall_info
= &later_info
;
295 } while ((skb
= skb
->next
));
297 /* Free all of the segments. */
305 } while ((skb
= nskb
));
309 static int queue_userspace_packet(int dp_ifindex
, struct sk_buff
*skb
,
310 const struct dp_upcall_info
*upcall_info
)
312 struct ovs_header
*upcall
;
313 struct sk_buff
*nskb
= NULL
;
314 struct sk_buff
*user_skb
; /* to be queued to userspace */
319 if (vlan_tx_tag_present(skb
)) {
320 nskb
= skb_clone(skb
, GFP_ATOMIC
);
324 nskb
= __vlan_put_tag(nskb
, vlan_tx_tag_get(nskb
));
332 if (nla_attr_size(skb
->len
) > USHRT_MAX
) {
337 len
= sizeof(struct ovs_header
);
338 len
+= nla_total_size(skb
->len
);
339 len
+= nla_total_size(FLOW_BUFSIZE
);
340 if (upcall_info
->cmd
== OVS_PACKET_CMD_ACTION
)
341 len
+= nla_total_size(8);
343 user_skb
= genlmsg_new(len
, GFP_ATOMIC
);
349 upcall
= genlmsg_put(user_skb
, 0, 0, &dp_packet_genl_family
,
350 0, upcall_info
->cmd
);
351 upcall
->dp_ifindex
= dp_ifindex
;
353 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_KEY
);
354 ovs_flow_to_nlattrs(upcall_info
->key
, user_skb
);
355 nla_nest_end(user_skb
, nla
);
357 if (upcall_info
->userdata
)
358 nla_put_u64(user_skb
, OVS_PACKET_ATTR_USERDATA
,
359 nla_get_u64(upcall_info
->userdata
));
361 nla
= __nla_reserve(user_skb
, OVS_PACKET_ATTR_PACKET
, skb
->len
);
363 skb_copy_and_csum_dev(skb
, nla_data(nla
));
365 err
= genlmsg_unicast(&init_net
, user_skb
, upcall_info
->pid
);
372 /* Called with genl_mutex. */
373 static int flush_flows(int dp_ifindex
)
375 struct flow_table
*old_table
;
376 struct flow_table
*new_table
;
379 dp
= get_dp(dp_ifindex
);
383 old_table
= genl_dereference(dp
->table
);
384 new_table
= ovs_flow_tbl_alloc(TBL_MIN_BUCKETS
);
388 rcu_assign_pointer(dp
->table
, new_table
);
390 ovs_flow_tbl_deferred_destroy(old_table
);
394 static int validate_actions(const struct nlattr
*attr
,
395 const struct sw_flow_key
*key
, int depth
);
397 static int validate_sample(const struct nlattr
*attr
,
398 const struct sw_flow_key
*key
, int depth
)
400 const struct nlattr
*attrs
[OVS_SAMPLE_ATTR_MAX
+ 1];
401 const struct nlattr
*probability
, *actions
;
402 const struct nlattr
*a
;
405 memset(attrs
, 0, sizeof(attrs
));
406 nla_for_each_nested(a
, attr
, rem
) {
407 int type
= nla_type(a
);
408 if (!type
|| type
> OVS_SAMPLE_ATTR_MAX
|| attrs
[type
])
415 probability
= attrs
[OVS_SAMPLE_ATTR_PROBABILITY
];
416 if (!probability
|| nla_len(probability
) != sizeof(u32
))
419 actions
= attrs
[OVS_SAMPLE_ATTR_ACTIONS
];
420 if (!actions
|| (nla_len(actions
) && nla_len(actions
) < NLA_HDRLEN
))
422 return validate_actions(actions
, key
, depth
+ 1);
425 static int validate_set(const struct nlattr
*a
,
426 const struct sw_flow_key
*flow_key
)
428 const struct nlattr
*ovs_key
= nla_data(a
);
429 int key_type
= nla_type(ovs_key
);
431 /* There can be only one key in a action */
432 if (nla_total_size(nla_len(ovs_key
)) != nla_len(a
))
435 if (key_type
> OVS_KEY_ATTR_MAX
||
436 nla_len(ovs_key
) != ovs_key_lens
[key_type
])
440 const struct ovs_key_ipv4
*ipv4_key
;
442 case OVS_KEY_ATTR_PRIORITY
:
443 case OVS_KEY_ATTR_ETHERNET
:
446 case OVS_KEY_ATTR_IPV4
:
447 if (flow_key
->eth
.type
!= htons(ETH_P_IP
))
450 if (!flow_key
->ipv4
.addr
.src
|| !flow_key
->ipv4
.addr
.dst
)
453 ipv4_key
= nla_data(ovs_key
);
454 if (ipv4_key
->ipv4_proto
!= flow_key
->ip
.proto
)
457 if (ipv4_key
->ipv4_frag
!= flow_key
->ip
.frag
)
462 case OVS_KEY_ATTR_TCP
:
463 if (flow_key
->ip
.proto
!= IPPROTO_TCP
)
466 if (!flow_key
->ipv4
.tp
.src
|| !flow_key
->ipv4
.tp
.dst
)
471 case OVS_KEY_ATTR_UDP
:
472 if (flow_key
->ip
.proto
!= IPPROTO_UDP
)
475 if (!flow_key
->ipv4
.tp
.src
|| !flow_key
->ipv4
.tp
.dst
)
486 static int validate_userspace(const struct nlattr
*attr
)
488 static const struct nla_policy userspace_policy
[OVS_USERSPACE_ATTR_MAX
+ 1] = {
489 [OVS_USERSPACE_ATTR_PID
] = {.type
= NLA_U32
},
490 [OVS_USERSPACE_ATTR_USERDATA
] = {.type
= NLA_U64
},
492 struct nlattr
*a
[OVS_USERSPACE_ATTR_MAX
+ 1];
495 error
= nla_parse_nested(a
, OVS_USERSPACE_ATTR_MAX
,
496 attr
, userspace_policy
);
500 if (!a
[OVS_USERSPACE_ATTR_PID
] ||
501 !nla_get_u32(a
[OVS_USERSPACE_ATTR_PID
]))
507 static int validate_actions(const struct nlattr
*attr
,
508 const struct sw_flow_key
*key
, int depth
)
510 const struct nlattr
*a
;
513 if (depth
>= SAMPLE_ACTION_DEPTH
)
516 nla_for_each_nested(a
, attr
, rem
) {
517 /* Expected argument lengths, (u32)-1 for variable length. */
518 static const u32 action_lens
[OVS_ACTION_ATTR_MAX
+ 1] = {
519 [OVS_ACTION_ATTR_OUTPUT
] = sizeof(u32
),
520 [OVS_ACTION_ATTR_USERSPACE
] = (u32
)-1,
521 [OVS_ACTION_ATTR_PUSH_VLAN
] = sizeof(struct ovs_action_push_vlan
),
522 [OVS_ACTION_ATTR_POP_VLAN
] = 0,
523 [OVS_ACTION_ATTR_SET
] = (u32
)-1,
524 [OVS_ACTION_ATTR_SAMPLE
] = (u32
)-1
526 const struct ovs_action_push_vlan
*vlan
;
527 int type
= nla_type(a
);
529 if (type
> OVS_ACTION_ATTR_MAX
||
530 (action_lens
[type
] != nla_len(a
) &&
531 action_lens
[type
] != (u32
)-1))
535 case OVS_ACTION_ATTR_UNSPEC
:
538 case OVS_ACTION_ATTR_USERSPACE
:
539 err
= validate_userspace(a
);
544 case OVS_ACTION_ATTR_OUTPUT
:
545 if (nla_get_u32(a
) >= DP_MAX_PORTS
)
550 case OVS_ACTION_ATTR_POP_VLAN
:
553 case OVS_ACTION_ATTR_PUSH_VLAN
:
555 if (vlan
->vlan_tpid
!= htons(ETH_P_8021Q
))
557 if (!(vlan
->vlan_tci
& htons(VLAN_TAG_PRESENT
)))
561 case OVS_ACTION_ATTR_SET
:
562 err
= validate_set(a
, key
);
567 case OVS_ACTION_ATTR_SAMPLE
:
568 err
= validate_sample(a
, key
, depth
);
584 static void clear_stats(struct sw_flow
*flow
)
588 flow
->packet_count
= 0;
589 flow
->byte_count
= 0;
592 static int ovs_packet_cmd_execute(struct sk_buff
*skb
, struct genl_info
*info
)
594 struct ovs_header
*ovs_header
= info
->userhdr
;
595 struct nlattr
**a
= info
->attrs
;
596 struct sw_flow_actions
*acts
;
597 struct sk_buff
*packet
;
598 struct sw_flow
*flow
;
606 if (!a
[OVS_PACKET_ATTR_PACKET
] || !a
[OVS_PACKET_ATTR_KEY
] ||
607 !a
[OVS_PACKET_ATTR_ACTIONS
] ||
608 nla_len(a
[OVS_PACKET_ATTR_PACKET
]) < ETH_HLEN
)
611 len
= nla_len(a
[OVS_PACKET_ATTR_PACKET
]);
612 packet
= __dev_alloc_skb(NET_IP_ALIGN
+ len
, GFP_KERNEL
);
616 skb_reserve(packet
, NET_IP_ALIGN
);
618 memcpy(__skb_put(packet
, len
), nla_data(a
[OVS_PACKET_ATTR_PACKET
]), len
);
620 skb_reset_mac_header(packet
);
621 eth
= eth_hdr(packet
);
623 /* Normally, setting the skb 'protocol' field would be handled by a
624 * call to eth_type_trans(), but it assumes there's a sending
625 * device, which we may not have. */
626 if (ntohs(eth
->h_proto
) >= 1536)
627 packet
->protocol
= eth
->h_proto
;
629 packet
->protocol
= htons(ETH_P_802_2
);
631 /* Build an sw_flow for sending this packet. */
632 flow
= ovs_flow_alloc();
637 err
= ovs_flow_extract(packet
, -1, &flow
->key
, &key_len
);
641 err
= ovs_flow_metadata_from_nlattrs(&flow
->key
.phy
.priority
,
642 &flow
->key
.phy
.in_port
,
643 a
[OVS_PACKET_ATTR_KEY
]);
647 err
= validate_actions(a
[OVS_PACKET_ATTR_ACTIONS
], &flow
->key
, 0);
651 flow
->hash
= ovs_flow_hash(&flow
->key
, key_len
);
653 acts
= ovs_flow_actions_alloc(a
[OVS_PACKET_ATTR_ACTIONS
]);
657 rcu_assign_pointer(flow
->sf_acts
, acts
);
659 OVS_CB(packet
)->flow
= flow
;
660 packet
->priority
= flow
->key
.phy
.priority
;
663 dp
= get_dp(ovs_header
->dp_ifindex
);
669 err
= ovs_execute_actions(dp
, packet
);
686 static const struct nla_policy packet_policy
[OVS_PACKET_ATTR_MAX
+ 1] = {
687 [OVS_PACKET_ATTR_PACKET
] = { .type
= NLA_UNSPEC
},
688 [OVS_PACKET_ATTR_KEY
] = { .type
= NLA_NESTED
},
689 [OVS_PACKET_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
692 static struct genl_ops dp_packet_genl_ops
[] = {
693 { .cmd
= OVS_PACKET_CMD_EXECUTE
,
694 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
695 .policy
= packet_policy
,
696 .doit
= ovs_packet_cmd_execute
700 static void get_dp_stats(struct datapath
*dp
, struct ovs_dp_stats
*stats
)
703 struct flow_table
*table
= genl_dereference(dp
->table
);
705 stats
->n_flows
= ovs_flow_tbl_count(table
);
707 stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
708 for_each_possible_cpu(i
) {
709 const struct dp_stats_percpu
*percpu_stats
;
710 struct dp_stats_percpu local_stats
;
713 percpu_stats
= per_cpu_ptr(dp
->stats_percpu
, i
);
716 start
= u64_stats_fetch_begin_bh(&percpu_stats
->sync
);
717 local_stats
= *percpu_stats
;
718 } while (u64_stats_fetch_retry_bh(&percpu_stats
->sync
, start
));
720 stats
->n_hit
+= local_stats
.n_hit
;
721 stats
->n_missed
+= local_stats
.n_missed
;
722 stats
->n_lost
+= local_stats
.n_lost
;
726 static const struct nla_policy flow_policy
[OVS_FLOW_ATTR_MAX
+ 1] = {
727 [OVS_FLOW_ATTR_KEY
] = { .type
= NLA_NESTED
},
728 [OVS_FLOW_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
729 [OVS_FLOW_ATTR_CLEAR
] = { .type
= NLA_FLAG
},
732 static struct genl_family dp_flow_genl_family
= {
733 .id
= GENL_ID_GENERATE
,
734 .hdrsize
= sizeof(struct ovs_header
),
735 .name
= OVS_FLOW_FAMILY
,
736 .version
= OVS_FLOW_VERSION
,
737 .maxattr
= OVS_FLOW_ATTR_MAX
740 static struct genl_multicast_group ovs_dp_flow_multicast_group
= {
741 .name
= OVS_FLOW_MCGROUP
744 /* Called with genl_lock. */
745 static int ovs_flow_cmd_fill_info(struct sw_flow
*flow
, struct datapath
*dp
,
746 struct sk_buff
*skb
, u32 pid
,
747 u32 seq
, u32 flags
, u8 cmd
)
749 const int skb_orig_len
= skb
->len
;
750 const struct sw_flow_actions
*sf_acts
;
751 struct ovs_flow_stats stats
;
752 struct ovs_header
*ovs_header
;
758 sf_acts
= rcu_dereference_protected(flow
->sf_acts
,
759 lockdep_genl_is_held());
761 ovs_header
= genlmsg_put(skb
, pid
, seq
, &dp_flow_genl_family
, flags
, cmd
);
765 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
767 nla
= nla_nest_start(skb
, OVS_FLOW_ATTR_KEY
);
769 goto nla_put_failure
;
770 err
= ovs_flow_to_nlattrs(&flow
->key
, skb
);
773 nla_nest_end(skb
, nla
);
775 spin_lock_bh(&flow
->lock
);
777 stats
.n_packets
= flow
->packet_count
;
778 stats
.n_bytes
= flow
->byte_count
;
779 tcp_flags
= flow
->tcp_flags
;
780 spin_unlock_bh(&flow
->lock
);
783 NLA_PUT_U64(skb
, OVS_FLOW_ATTR_USED
, ovs_flow_used_time(used
));
786 NLA_PUT(skb
, OVS_FLOW_ATTR_STATS
,
787 sizeof(struct ovs_flow_stats
), &stats
);
790 NLA_PUT_U8(skb
, OVS_FLOW_ATTR_TCP_FLAGS
, tcp_flags
);
792 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
793 * this is the first flow to be dumped into 'skb'. This is unusual for
794 * Netlink but individual action lists can be longer than
795 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
796 * The userspace caller can always fetch the actions separately if it
797 * really wants them. (Most userspace callers in fact don't care.)
799 * This can only fail for dump operations because the skb is always
800 * properly sized for single flows.
802 err
= nla_put(skb
, OVS_FLOW_ATTR_ACTIONS
, sf_acts
->actions_len
,
804 if (err
< 0 && skb_orig_len
)
807 return genlmsg_end(skb
, ovs_header
);
812 genlmsg_cancel(skb
, ovs_header
);
816 static struct sk_buff
*ovs_flow_cmd_alloc_info(struct sw_flow
*flow
)
818 const struct sw_flow_actions
*sf_acts
;
821 sf_acts
= rcu_dereference_protected(flow
->sf_acts
,
822 lockdep_genl_is_held());
824 /* OVS_FLOW_ATTR_KEY */
825 len
= nla_total_size(FLOW_BUFSIZE
);
826 /* OVS_FLOW_ATTR_ACTIONS */
827 len
+= nla_total_size(sf_acts
->actions_len
);
828 /* OVS_FLOW_ATTR_STATS */
829 len
+= nla_total_size(sizeof(struct ovs_flow_stats
));
830 /* OVS_FLOW_ATTR_TCP_FLAGS */
831 len
+= nla_total_size(1);
832 /* OVS_FLOW_ATTR_USED */
833 len
+= nla_total_size(8);
835 len
+= NLMSG_ALIGN(sizeof(struct ovs_header
));
837 return genlmsg_new(len
, GFP_KERNEL
);
840 static struct sk_buff
*ovs_flow_cmd_build_info(struct sw_flow
*flow
,
842 u32 pid
, u32 seq
, u8 cmd
)
847 skb
= ovs_flow_cmd_alloc_info(flow
);
849 return ERR_PTR(-ENOMEM
);
851 retval
= ovs_flow_cmd_fill_info(flow
, dp
, skb
, pid
, seq
, 0, cmd
);
856 static int ovs_flow_cmd_new_or_set(struct sk_buff
*skb
, struct genl_info
*info
)
858 struct nlattr
**a
= info
->attrs
;
859 struct ovs_header
*ovs_header
= info
->userhdr
;
860 struct sw_flow_key key
;
861 struct sw_flow
*flow
;
862 struct sk_buff
*reply
;
864 struct flow_table
*table
;
870 if (!a
[OVS_FLOW_ATTR_KEY
])
872 error
= ovs_flow_from_nlattrs(&key
, &key_len
, a
[OVS_FLOW_ATTR_KEY
]);
876 /* Validate actions. */
877 if (a
[OVS_FLOW_ATTR_ACTIONS
]) {
878 error
= validate_actions(a
[OVS_FLOW_ATTR_ACTIONS
], &key
, 0);
881 } else if (info
->genlhdr
->cmd
== OVS_FLOW_CMD_NEW
) {
886 dp
= get_dp(ovs_header
->dp_ifindex
);
891 table
= genl_dereference(dp
->table
);
892 flow
= ovs_flow_tbl_lookup(table
, &key
, key_len
);
894 struct sw_flow_actions
*acts
;
896 /* Bail out if we're not allowed to create a new flow. */
898 if (info
->genlhdr
->cmd
== OVS_FLOW_CMD_SET
)
901 /* Expand table, if necessary, to make room. */
902 if (ovs_flow_tbl_need_to_expand(table
)) {
903 struct flow_table
*new_table
;
905 new_table
= ovs_flow_tbl_expand(table
);
906 if (!IS_ERR(new_table
)) {
907 rcu_assign_pointer(dp
->table
, new_table
);
908 ovs_flow_tbl_deferred_destroy(table
);
909 table
= genl_dereference(dp
->table
);
914 flow
= ovs_flow_alloc();
916 error
= PTR_ERR(flow
);
922 /* Obtain actions. */
923 acts
= ovs_flow_actions_alloc(a
[OVS_FLOW_ATTR_ACTIONS
]);
924 error
= PTR_ERR(acts
);
926 goto error_free_flow
;
927 rcu_assign_pointer(flow
->sf_acts
, acts
);
929 /* Put flow in bucket. */
930 flow
->hash
= ovs_flow_hash(&key
, key_len
);
931 ovs_flow_tbl_insert(table
, flow
);
933 reply
= ovs_flow_cmd_build_info(flow
, dp
, info
->snd_pid
,
937 /* We found a matching flow. */
938 struct sw_flow_actions
*old_acts
;
939 struct nlattr
*acts_attrs
;
941 /* Bail out if we're not allowed to modify an existing flow.
942 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
943 * because Generic Netlink treats the latter as a dump
944 * request. We also accept NLM_F_EXCL in case that bug ever
948 if (info
->genlhdr
->cmd
== OVS_FLOW_CMD_NEW
&&
949 info
->nlhdr
->nlmsg_flags
& (NLM_F_CREATE
| NLM_F_EXCL
))
952 /* Update actions. */
953 old_acts
= rcu_dereference_protected(flow
->sf_acts
,
954 lockdep_genl_is_held());
955 acts_attrs
= a
[OVS_FLOW_ATTR_ACTIONS
];
957 (old_acts
->actions_len
!= nla_len(acts_attrs
) ||
958 memcmp(old_acts
->actions
, nla_data(acts_attrs
),
959 old_acts
->actions_len
))) {
960 struct sw_flow_actions
*new_acts
;
962 new_acts
= ovs_flow_actions_alloc(acts_attrs
);
963 error
= PTR_ERR(new_acts
);
964 if (IS_ERR(new_acts
))
967 rcu_assign_pointer(flow
->sf_acts
, new_acts
);
968 ovs_flow_deferred_free_acts(old_acts
);
971 reply
= ovs_flow_cmd_build_info(flow
, dp
, info
->snd_pid
,
972 info
->snd_seq
, OVS_FLOW_CMD_NEW
);
975 if (a
[OVS_FLOW_ATTR_CLEAR
]) {
976 spin_lock_bh(&flow
->lock
);
978 spin_unlock_bh(&flow
->lock
);
983 genl_notify(reply
, genl_info_net(info
), info
->snd_pid
,
984 ovs_dp_flow_multicast_group
.id
, info
->nlhdr
,
987 netlink_set_err(init_net
.genl_sock
, 0,
988 ovs_dp_flow_multicast_group
.id
, PTR_ERR(reply
));
997 static int ovs_flow_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
999 struct nlattr
**a
= info
->attrs
;
1000 struct ovs_header
*ovs_header
= info
->userhdr
;
1001 struct sw_flow_key key
;
1002 struct sk_buff
*reply
;
1003 struct sw_flow
*flow
;
1004 struct datapath
*dp
;
1005 struct flow_table
*table
;
1009 if (!a
[OVS_FLOW_ATTR_KEY
])
1011 err
= ovs_flow_from_nlattrs(&key
, &key_len
, a
[OVS_FLOW_ATTR_KEY
]);
1015 dp
= get_dp(ovs_header
->dp_ifindex
);
1019 table
= genl_dereference(dp
->table
);
1020 flow
= ovs_flow_tbl_lookup(table
, &key
, key_len
);
1024 reply
= ovs_flow_cmd_build_info(flow
, dp
, info
->snd_pid
,
1025 info
->snd_seq
, OVS_FLOW_CMD_NEW
);
1027 return PTR_ERR(reply
);
1029 return genlmsg_reply(reply
, info
);
1032 static int ovs_flow_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1034 struct nlattr
**a
= info
->attrs
;
1035 struct ovs_header
*ovs_header
= info
->userhdr
;
1036 struct sw_flow_key key
;
1037 struct sk_buff
*reply
;
1038 struct sw_flow
*flow
;
1039 struct datapath
*dp
;
1040 struct flow_table
*table
;
1044 if (!a
[OVS_FLOW_ATTR_KEY
])
1045 return flush_flows(ovs_header
->dp_ifindex
);
1046 err
= ovs_flow_from_nlattrs(&key
, &key_len
, a
[OVS_FLOW_ATTR_KEY
]);
1050 dp
= get_dp(ovs_header
->dp_ifindex
);
1054 table
= genl_dereference(dp
->table
);
1055 flow
= ovs_flow_tbl_lookup(table
, &key
, key_len
);
1059 reply
= ovs_flow_cmd_alloc_info(flow
);
1063 ovs_flow_tbl_remove(table
, flow
);
1065 err
= ovs_flow_cmd_fill_info(flow
, dp
, reply
, info
->snd_pid
,
1066 info
->snd_seq
, 0, OVS_FLOW_CMD_DEL
);
1069 ovs_flow_deferred_free(flow
);
1071 genl_notify(reply
, genl_info_net(info
), info
->snd_pid
,
1072 ovs_dp_flow_multicast_group
.id
, info
->nlhdr
, GFP_KERNEL
);
1076 static int ovs_flow_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1078 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1079 struct datapath
*dp
;
1080 struct flow_table
*table
;
1082 dp
= get_dp(ovs_header
->dp_ifindex
);
1086 table
= genl_dereference(dp
->table
);
1089 struct sw_flow
*flow
;
1092 bucket
= cb
->args
[0];
1094 flow
= ovs_flow_tbl_next(table
, &bucket
, &obj
);
1098 if (ovs_flow_cmd_fill_info(flow
, dp
, skb
,
1099 NETLINK_CB(cb
->skb
).pid
,
1100 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1101 OVS_FLOW_CMD_NEW
) < 0)
1104 cb
->args
[0] = bucket
;
1110 static struct genl_ops dp_flow_genl_ops
[] = {
1111 { .cmd
= OVS_FLOW_CMD_NEW
,
1112 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1113 .policy
= flow_policy
,
1114 .doit
= ovs_flow_cmd_new_or_set
1116 { .cmd
= OVS_FLOW_CMD_DEL
,
1117 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1118 .policy
= flow_policy
,
1119 .doit
= ovs_flow_cmd_del
1121 { .cmd
= OVS_FLOW_CMD_GET
,
1122 .flags
= 0, /* OK for unprivileged users. */
1123 .policy
= flow_policy
,
1124 .doit
= ovs_flow_cmd_get
,
1125 .dumpit
= ovs_flow_cmd_dump
1127 { .cmd
= OVS_FLOW_CMD_SET
,
1128 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1129 .policy
= flow_policy
,
1130 .doit
= ovs_flow_cmd_new_or_set
,
1134 static const struct nla_policy datapath_policy
[OVS_DP_ATTR_MAX
+ 1] = {
1135 [OVS_DP_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1136 [OVS_DP_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1139 static struct genl_family dp_datapath_genl_family
= {
1140 .id
= GENL_ID_GENERATE
,
1141 .hdrsize
= sizeof(struct ovs_header
),
1142 .name
= OVS_DATAPATH_FAMILY
,
1143 .version
= OVS_DATAPATH_VERSION
,
1144 .maxattr
= OVS_DP_ATTR_MAX
1147 static struct genl_multicast_group ovs_dp_datapath_multicast_group
= {
1148 .name
= OVS_DATAPATH_MCGROUP
1151 static int ovs_dp_cmd_fill_info(struct datapath
*dp
, struct sk_buff
*skb
,
1152 u32 pid
, u32 seq
, u32 flags
, u8 cmd
)
1154 struct ovs_header
*ovs_header
;
1155 struct ovs_dp_stats dp_stats
;
1158 ovs_header
= genlmsg_put(skb
, pid
, seq
, &dp_datapath_genl_family
,
1163 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
1166 err
= nla_put_string(skb
, OVS_DP_ATTR_NAME
, ovs_dp_name(dp
));
1169 goto nla_put_failure
;
1171 get_dp_stats(dp
, &dp_stats
);
1172 NLA_PUT(skb
, OVS_DP_ATTR_STATS
, sizeof(struct ovs_dp_stats
), &dp_stats
);
1174 return genlmsg_end(skb
, ovs_header
);
1177 genlmsg_cancel(skb
, ovs_header
);
1182 static struct sk_buff
*ovs_dp_cmd_build_info(struct datapath
*dp
, u32 pid
,
1185 struct sk_buff
*skb
;
1188 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1190 return ERR_PTR(-ENOMEM
);
1192 retval
= ovs_dp_cmd_fill_info(dp
, skb
, pid
, seq
, 0, cmd
);
1195 return ERR_PTR(retval
);
1200 /* Called with genl_mutex and optionally with RTNL lock also. */
1201 static struct datapath
*lookup_datapath(struct ovs_header
*ovs_header
,
1202 struct nlattr
*a
[OVS_DP_ATTR_MAX
+ 1])
1204 struct datapath
*dp
;
1206 if (!a
[OVS_DP_ATTR_NAME
])
1207 dp
= get_dp(ovs_header
->dp_ifindex
);
1209 struct vport
*vport
;
1212 vport
= ovs_vport_locate(nla_data(a
[OVS_DP_ATTR_NAME
]));
1213 dp
= vport
&& vport
->port_no
== OVSP_LOCAL
? vport
->dp
: NULL
;
1216 return dp
? dp
: ERR_PTR(-ENODEV
);
1219 static int ovs_dp_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1221 struct nlattr
**a
= info
->attrs
;
1222 struct vport_parms parms
;
1223 struct sk_buff
*reply
;
1224 struct datapath
*dp
;
1225 struct vport
*vport
;
1229 if (!a
[OVS_DP_ATTR_NAME
] || !a
[OVS_DP_ATTR_UPCALL_PID
])
1234 if (!try_module_get(THIS_MODULE
))
1235 goto err_unlock_rtnl
;
1238 dp
= kzalloc(sizeof(*dp
), GFP_KERNEL
);
1240 goto err_put_module
;
1241 INIT_LIST_HEAD(&dp
->port_list
);
1243 /* Allocate table. */
1245 rcu_assign_pointer(dp
->table
, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS
));
1249 dp
->stats_percpu
= alloc_percpu(struct dp_stats_percpu
);
1250 if (!dp
->stats_percpu
) {
1252 goto err_destroy_table
;
1255 /* Set up our datapath device. */
1256 parms
.name
= nla_data(a
[OVS_DP_ATTR_NAME
]);
1257 parms
.type
= OVS_VPORT_TYPE_INTERNAL
;
1258 parms
.options
= NULL
;
1260 parms
.port_no
= OVSP_LOCAL
;
1261 parms
.upcall_pid
= nla_get_u32(a
[OVS_DP_ATTR_UPCALL_PID
]);
1263 vport
= new_vport(&parms
);
1264 if (IS_ERR(vport
)) {
1265 err
= PTR_ERR(vport
);
1269 goto err_destroy_percpu
;
1272 reply
= ovs_dp_cmd_build_info(dp
, info
->snd_pid
,
1273 info
->snd_seq
, OVS_DP_CMD_NEW
);
1274 err
= PTR_ERR(reply
);
1276 goto err_destroy_local_port
;
1278 list_add_tail(&dp
->list_node
, &dps
);
1281 genl_notify(reply
, genl_info_net(info
), info
->snd_pid
,
1282 ovs_dp_datapath_multicast_group
.id
, info
->nlhdr
,
1286 err_destroy_local_port
:
1287 ovs_dp_detach_port(rtnl_dereference(dp
->ports
[OVSP_LOCAL
]));
1289 free_percpu(dp
->stats_percpu
);
1291 ovs_flow_tbl_destroy(genl_dereference(dp
->table
));
1295 module_put(THIS_MODULE
);
1302 static int ovs_dp_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1304 struct vport
*vport
, *next_vport
;
1305 struct sk_buff
*reply
;
1306 struct datapath
*dp
;
1310 dp
= lookup_datapath(info
->userhdr
, info
->attrs
);
1315 reply
= ovs_dp_cmd_build_info(dp
, info
->snd_pid
,
1316 info
->snd_seq
, OVS_DP_CMD_DEL
);
1317 err
= PTR_ERR(reply
);
1321 list_for_each_entry_safe(vport
, next_vport
, &dp
->port_list
, node
)
1322 if (vport
->port_no
!= OVSP_LOCAL
)
1323 ovs_dp_detach_port(vport
);
1325 list_del(&dp
->list_node
);
1326 ovs_dp_detach_port(rtnl_dereference(dp
->ports
[OVSP_LOCAL
]));
1328 /* rtnl_unlock() will wait until all the references to devices that
1329 * are pending unregistration have been dropped. We do it here to
1330 * ensure that any internal devices (which contain DP pointers) are
1331 * fully destroyed before freeing the datapath.
1335 call_rcu(&dp
->rcu
, destroy_dp_rcu
);
1336 module_put(THIS_MODULE
);
1338 genl_notify(reply
, genl_info_net(info
), info
->snd_pid
,
1339 ovs_dp_datapath_multicast_group
.id
, info
->nlhdr
,
1349 static int ovs_dp_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1351 struct sk_buff
*reply
;
1352 struct datapath
*dp
;
1355 dp
= lookup_datapath(info
->userhdr
, info
->attrs
);
1359 reply
= ovs_dp_cmd_build_info(dp
, info
->snd_pid
,
1360 info
->snd_seq
, OVS_DP_CMD_NEW
);
1361 if (IS_ERR(reply
)) {
1362 err
= PTR_ERR(reply
);
1363 netlink_set_err(init_net
.genl_sock
, 0,
1364 ovs_dp_datapath_multicast_group
.id
, err
);
1368 genl_notify(reply
, genl_info_net(info
), info
->snd_pid
,
1369 ovs_dp_datapath_multicast_group
.id
, info
->nlhdr
,
1375 static int ovs_dp_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1377 struct sk_buff
*reply
;
1378 struct datapath
*dp
;
1380 dp
= lookup_datapath(info
->userhdr
, info
->attrs
);
1384 reply
= ovs_dp_cmd_build_info(dp
, info
->snd_pid
,
1385 info
->snd_seq
, OVS_DP_CMD_NEW
);
1387 return PTR_ERR(reply
);
1389 return genlmsg_reply(reply
, info
);
1392 static int ovs_dp_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1394 struct datapath
*dp
;
1395 int skip
= cb
->args
[0];
1398 list_for_each_entry(dp
, &dps
, list_node
) {
1400 ovs_dp_cmd_fill_info(dp
, skb
, NETLINK_CB(cb
->skb
).pid
,
1401 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1402 OVS_DP_CMD_NEW
) < 0)
1412 static struct genl_ops dp_datapath_genl_ops
[] = {
1413 { .cmd
= OVS_DP_CMD_NEW
,
1414 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1415 .policy
= datapath_policy
,
1416 .doit
= ovs_dp_cmd_new
1418 { .cmd
= OVS_DP_CMD_DEL
,
1419 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1420 .policy
= datapath_policy
,
1421 .doit
= ovs_dp_cmd_del
1423 { .cmd
= OVS_DP_CMD_GET
,
1424 .flags
= 0, /* OK for unprivileged users. */
1425 .policy
= datapath_policy
,
1426 .doit
= ovs_dp_cmd_get
,
1427 .dumpit
= ovs_dp_cmd_dump
1429 { .cmd
= OVS_DP_CMD_SET
,
1430 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1431 .policy
= datapath_policy
,
1432 .doit
= ovs_dp_cmd_set
,
1436 static const struct nla_policy vport_policy
[OVS_VPORT_ATTR_MAX
+ 1] = {
1437 [OVS_VPORT_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1438 [OVS_VPORT_ATTR_STATS
] = { .len
= sizeof(struct ovs_vport_stats
) },
1439 [OVS_VPORT_ATTR_PORT_NO
] = { .type
= NLA_U32
},
1440 [OVS_VPORT_ATTR_TYPE
] = { .type
= NLA_U32
},
1441 [OVS_VPORT_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1442 [OVS_VPORT_ATTR_OPTIONS
] = { .type
= NLA_NESTED
},
1445 static struct genl_family dp_vport_genl_family
= {
1446 .id
= GENL_ID_GENERATE
,
1447 .hdrsize
= sizeof(struct ovs_header
),
1448 .name
= OVS_VPORT_FAMILY
,
1449 .version
= OVS_VPORT_VERSION
,
1450 .maxattr
= OVS_VPORT_ATTR_MAX
1453 struct genl_multicast_group ovs_dp_vport_multicast_group
= {
1454 .name
= OVS_VPORT_MCGROUP
1457 /* Called with RTNL lock or RCU read lock. */
1458 static int ovs_vport_cmd_fill_info(struct vport
*vport
, struct sk_buff
*skb
,
1459 u32 pid
, u32 seq
, u32 flags
, u8 cmd
)
1461 struct ovs_header
*ovs_header
;
1462 struct ovs_vport_stats vport_stats
;
1465 ovs_header
= genlmsg_put(skb
, pid
, seq
, &dp_vport_genl_family
,
1470 ovs_header
->dp_ifindex
= get_dpifindex(vport
->dp
);
1472 NLA_PUT_U32(skb
, OVS_VPORT_ATTR_PORT_NO
, vport
->port_no
);
1473 NLA_PUT_U32(skb
, OVS_VPORT_ATTR_TYPE
, vport
->ops
->type
);
1474 NLA_PUT_STRING(skb
, OVS_VPORT_ATTR_NAME
, vport
->ops
->get_name(vport
));
1475 NLA_PUT_U32(skb
, OVS_VPORT_ATTR_UPCALL_PID
, vport
->upcall_pid
);
1477 ovs_vport_get_stats(vport
, &vport_stats
);
1478 NLA_PUT(skb
, OVS_VPORT_ATTR_STATS
, sizeof(struct ovs_vport_stats
),
1481 err
= ovs_vport_get_options(vport
, skb
);
1482 if (err
== -EMSGSIZE
)
1485 return genlmsg_end(skb
, ovs_header
);
1490 genlmsg_cancel(skb
, ovs_header
);
1494 /* Called with RTNL lock or RCU read lock. */
1495 struct sk_buff
*ovs_vport_cmd_build_info(struct vport
*vport
, u32 pid
,
1498 struct sk_buff
*skb
;
1501 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
1503 return ERR_PTR(-ENOMEM
);
1505 retval
= ovs_vport_cmd_fill_info(vport
, skb
, pid
, seq
, 0, cmd
);
1508 return ERR_PTR(retval
);
1513 /* Called with RTNL lock or RCU read lock. */
1514 static struct vport
*lookup_vport(struct ovs_header
*ovs_header
,
1515 struct nlattr
*a
[OVS_VPORT_ATTR_MAX
+ 1])
1517 struct datapath
*dp
;
1518 struct vport
*vport
;
1520 if (a
[OVS_VPORT_ATTR_NAME
]) {
1521 vport
= ovs_vport_locate(nla_data(a
[OVS_VPORT_ATTR_NAME
]));
1523 return ERR_PTR(-ENODEV
);
1525 } else if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
1526 u32 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1528 if (port_no
>= DP_MAX_PORTS
)
1529 return ERR_PTR(-EFBIG
);
1531 dp
= get_dp(ovs_header
->dp_ifindex
);
1533 return ERR_PTR(-ENODEV
);
1535 vport
= rcu_dereference_rtnl(dp
->ports
[port_no
]);
1537 return ERR_PTR(-ENOENT
);
1540 return ERR_PTR(-EINVAL
);
1543 static int ovs_vport_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1545 struct nlattr
**a
= info
->attrs
;
1546 struct ovs_header
*ovs_header
= info
->userhdr
;
1547 struct vport_parms parms
;
1548 struct sk_buff
*reply
;
1549 struct vport
*vport
;
1550 struct datapath
*dp
;
1555 if (!a
[OVS_VPORT_ATTR_NAME
] || !a
[OVS_VPORT_ATTR_TYPE
] ||
1556 !a
[OVS_VPORT_ATTR_UPCALL_PID
])
1560 dp
= get_dp(ovs_header
->dp_ifindex
);
1565 if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
1566 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1569 if (port_no
>= DP_MAX_PORTS
)
1572 vport
= rtnl_dereference(dp
->ports
[port_no
]);
1577 for (port_no
= 1; ; port_no
++) {
1578 if (port_no
>= DP_MAX_PORTS
) {
1582 vport
= rtnl_dereference(dp
->ports
[port_no
]);
1588 parms
.name
= nla_data(a
[OVS_VPORT_ATTR_NAME
]);
1589 parms
.type
= nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]);
1590 parms
.options
= a
[OVS_VPORT_ATTR_OPTIONS
];
1592 parms
.port_no
= port_no
;
1593 parms
.upcall_pid
= nla_get_u32(a
[OVS_VPORT_ATTR_UPCALL_PID
]);
1595 vport
= new_vport(&parms
);
1596 err
= PTR_ERR(vport
);
1600 reply
= ovs_vport_cmd_build_info(vport
, info
->snd_pid
, info
->snd_seq
,
1602 if (IS_ERR(reply
)) {
1603 err
= PTR_ERR(reply
);
1604 ovs_dp_detach_port(vport
);
1607 genl_notify(reply
, genl_info_net(info
), info
->snd_pid
,
1608 ovs_dp_vport_multicast_group
.id
, info
->nlhdr
, GFP_KERNEL
);
1616 static int ovs_vport_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1618 struct nlattr
**a
= info
->attrs
;
1619 struct sk_buff
*reply
;
1620 struct vport
*vport
;
1624 vport
= lookup_vport(info
->userhdr
, a
);
1625 err
= PTR_ERR(vport
);
1630 if (a
[OVS_VPORT_ATTR_TYPE
] &&
1631 nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]) != vport
->ops
->type
)
1634 if (!err
&& a
[OVS_VPORT_ATTR_OPTIONS
])
1635 err
= ovs_vport_set_options(vport
, a
[OVS_VPORT_ATTR_OPTIONS
]);
1636 if (!err
&& a
[OVS_VPORT_ATTR_UPCALL_PID
])
1637 vport
->upcall_pid
= nla_get_u32(a
[OVS_VPORT_ATTR_UPCALL_PID
]);
1639 reply
= ovs_vport_cmd_build_info(vport
, info
->snd_pid
, info
->snd_seq
,
1641 if (IS_ERR(reply
)) {
1642 err
= PTR_ERR(reply
);
1643 netlink_set_err(init_net
.genl_sock
, 0,
1644 ovs_dp_vport_multicast_group
.id
, err
);
1648 genl_notify(reply
, genl_info_net(info
), info
->snd_pid
,
1649 ovs_dp_vport_multicast_group
.id
, info
->nlhdr
, GFP_KERNEL
);
1656 static int ovs_vport_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1658 struct nlattr
**a
= info
->attrs
;
1659 struct sk_buff
*reply
;
1660 struct vport
*vport
;
1664 vport
= lookup_vport(info
->userhdr
, a
);
1665 err
= PTR_ERR(vport
);
1669 if (vport
->port_no
== OVSP_LOCAL
) {
1674 reply
= ovs_vport_cmd_build_info(vport
, info
->snd_pid
, info
->snd_seq
,
1676 err
= PTR_ERR(reply
);
1680 ovs_dp_detach_port(vport
);
1682 genl_notify(reply
, genl_info_net(info
), info
->snd_pid
,
1683 ovs_dp_vport_multicast_group
.id
, info
->nlhdr
, GFP_KERNEL
);
1690 static int ovs_vport_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1692 struct nlattr
**a
= info
->attrs
;
1693 struct ovs_header
*ovs_header
= info
->userhdr
;
1694 struct sk_buff
*reply
;
1695 struct vport
*vport
;
1699 vport
= lookup_vport(ovs_header
, a
);
1700 err
= PTR_ERR(vport
);
1704 reply
= ovs_vport_cmd_build_info(vport
, info
->snd_pid
, info
->snd_seq
,
1706 err
= PTR_ERR(reply
);
1712 return genlmsg_reply(reply
, info
);
1719 static int ovs_vport_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1721 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1722 struct datapath
*dp
;
1726 dp
= get_dp(ovs_header
->dp_ifindex
);
1731 for (port_no
= cb
->args
[0]; port_no
< DP_MAX_PORTS
; port_no
++) {
1732 struct vport
*vport
;
1734 vport
= rcu_dereference(dp
->ports
[port_no
]);
1738 if (ovs_vport_cmd_fill_info(vport
, skb
, NETLINK_CB(cb
->skb
).pid
,
1739 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1740 OVS_VPORT_CMD_NEW
) < 0)
1745 cb
->args
[0] = port_no
;
1751 static void rehash_flow_table(struct work_struct
*work
)
1753 struct datapath
*dp
;
1757 list_for_each_entry(dp
, &dps
, list_node
) {
1758 struct flow_table
*old_table
= genl_dereference(dp
->table
);
1759 struct flow_table
*new_table
;
1761 new_table
= ovs_flow_tbl_rehash(old_table
);
1762 if (!IS_ERR(new_table
)) {
1763 rcu_assign_pointer(dp
->table
, new_table
);
1764 ovs_flow_tbl_deferred_destroy(old_table
);
1770 schedule_delayed_work(&rehash_flow_wq
, REHASH_FLOW_INTERVAL
);
1773 static struct genl_ops dp_vport_genl_ops
[] = {
1774 { .cmd
= OVS_VPORT_CMD_NEW
,
1775 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1776 .policy
= vport_policy
,
1777 .doit
= ovs_vport_cmd_new
1779 { .cmd
= OVS_VPORT_CMD_DEL
,
1780 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1781 .policy
= vport_policy
,
1782 .doit
= ovs_vport_cmd_del
1784 { .cmd
= OVS_VPORT_CMD_GET
,
1785 .flags
= 0, /* OK for unprivileged users. */
1786 .policy
= vport_policy
,
1787 .doit
= ovs_vport_cmd_get
,
1788 .dumpit
= ovs_vport_cmd_dump
1790 { .cmd
= OVS_VPORT_CMD_SET
,
1791 .flags
= GENL_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1792 .policy
= vport_policy
,
1793 .doit
= ovs_vport_cmd_set
,
1797 struct genl_family_and_ops
{
1798 struct genl_family
*family
;
1799 struct genl_ops
*ops
;
1801 struct genl_multicast_group
*group
;
1804 static const struct genl_family_and_ops dp_genl_families
[] = {
1805 { &dp_datapath_genl_family
,
1806 dp_datapath_genl_ops
, ARRAY_SIZE(dp_datapath_genl_ops
),
1807 &ovs_dp_datapath_multicast_group
},
1808 { &dp_vport_genl_family
,
1809 dp_vport_genl_ops
, ARRAY_SIZE(dp_vport_genl_ops
),
1810 &ovs_dp_vport_multicast_group
},
1811 { &dp_flow_genl_family
,
1812 dp_flow_genl_ops
, ARRAY_SIZE(dp_flow_genl_ops
),
1813 &ovs_dp_flow_multicast_group
},
1814 { &dp_packet_genl_family
,
1815 dp_packet_genl_ops
, ARRAY_SIZE(dp_packet_genl_ops
),
1819 static void dp_unregister_genl(int n_families
)
1823 for (i
= 0; i
< n_families
; i
++)
1824 genl_unregister_family(dp_genl_families
[i
].family
);
1827 static int dp_register_genl(void)
1834 for (i
= 0; i
< ARRAY_SIZE(dp_genl_families
); i
++) {
1835 const struct genl_family_and_ops
*f
= &dp_genl_families
[i
];
1837 err
= genl_register_family_with_ops(f
->family
, f
->ops
,
1844 err
= genl_register_mc_group(f
->family
, f
->group
);
1853 dp_unregister_genl(n_registered
);
1857 static int __init
dp_init(void)
1859 struct sk_buff
*dummy_skb
;
1862 BUILD_BUG_ON(sizeof(struct ovs_skb_cb
) > sizeof(dummy_skb
->cb
));
1864 pr_info("Open vSwitch switching datapath\n");
1866 err
= ovs_flow_init();
1870 err
= ovs_vport_init();
1872 goto error_flow_exit
;
1874 err
= register_netdevice_notifier(&ovs_dp_device_notifier
);
1876 goto error_vport_exit
;
1878 err
= dp_register_genl();
1880 goto error_unreg_notifier
;
1882 schedule_delayed_work(&rehash_flow_wq
, REHASH_FLOW_INTERVAL
);
1886 error_unreg_notifier
:
1887 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
1896 static void dp_cleanup(void)
1898 cancel_delayed_work_sync(&rehash_flow_wq
);
1900 dp_unregister_genl(ARRAY_SIZE(dp_genl_families
));
1901 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
1906 module_init(dp_init
);
1907 module_exit(dp_cleanup
);
1909 MODULE_DESCRIPTION("Open vSwitch switching datapath");
1910 MODULE_LICENSE("GPL");