]> git.ipfire.org Git - thirdparty/linux.git/blame - net/openvswitch/datapath.c
projects / thirdparty / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ip_tunnel: Add dont fragment flag.
[thirdparty/linux.git] / net / openvswitch / datapath.c
CommitLineData
ccb1352e 1/*
caf2ee14 2 * Copyright (c) 2007-2012 Nicira, Inc.
ccb1352e
JG		 3 *
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.
7 *
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.
12 *
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
16 * 02110-1301, USA
17 */
18
19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
21#include <linux/init.h>
22#include <linux/module.h>
23#include <linux/if_arp.h>
24#include <linux/if_vlan.h>
25#include <linux/in.h>
26#include <linux/ip.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>
ccb1352e
JG		 39#include <linux/ethtool.h>
40#include <linux/wait.h>
ccb1352e
JG		 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>
8e4e1713 47#include <linux/lockdep.h>
ccb1352e
JG		 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>
46df7b81
PS		 53#include <net/net_namespace.h>
54#include <net/netns/generic.h>
ccb1352e
JG		 55
56#include "datapath.h"
57#include "flow.h"
58#include "vport-internal_dev.h"
cff63a52 59#include "vport-netdev.h"
ccb1352e 60
46df7b81
PS		 61
62#define REHASH_FLOW_INTERVAL (10 * 60 * HZ)
63static void rehash_flow_table(struct work_struct *work);
64static DECLARE_DELAYED_WORK(rehash_flow_wq, rehash_flow_table);
65
8e4e1713
PS		 66int ovs_net_id __read_mostly;
67
ed661185
TG		 68static void ovs_notify(struct sk_buff *skb, struct genl_info *info,
69 struct genl_multicast_group *grp)
70{
71 genl_notify(skb, genl_info_net(info), info->snd_portid,
72 grp->id, info->nlhdr, GFP_KERNEL);
73}
74
ccb1352e
JG		 75/**
76 * DOC: Locking:
77 *
8e4e1713
PS		 78 * All writes e.g. Writes to device state (add/remove datapath, port, set
79 * operations on vports, etc.), Writes to other state (flow table
80 * modifications, set miscellaneous datapath parameters, etc.) are protected
81 * by ovs_lock.
ccb1352e
JG		 82 *
83 * Reads are protected by RCU.
84 *
85 * There are a few special cases (mostly stats) that have their own
86 * synchronization but they nest under all of above and don't interact with
87 * each other.
8e4e1713
PS		 88 *
89 * The RTNL lock nests inside ovs_mutex.
ccb1352e
JG		 90 */
91
8e4e1713
PS		 92static DEFINE_MUTEX(ovs_mutex);
93
94void ovs_lock(void)
95{
96 mutex_lock(&ovs_mutex);
97}
98
99void ovs_unlock(void)
100{
101 mutex_unlock(&ovs_mutex);
102}
103
104#ifdef CONFIG_LOCKDEP
105int lockdep_ovsl_is_held(void)
106{
107 if (debug_locks)
108 return lockdep_is_held(&ovs_mutex);
109 else
110 return 1;
111}
112#endif
113
ccb1352e 114static struct vport *new_vport(const struct vport_parms *);
46df7b81 115static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *,
ccb1352e 116 const struct dp_upcall_info *);
46df7b81
PS		 117static int queue_userspace_packet(struct net *, int dp_ifindex,
118 struct sk_buff *,
ccb1352e
JG		 119 const struct dp_upcall_info *);
120
8e4e1713 121/* Must be called with rcu_read_lock or ovs_mutex. */
46df7b81 122static struct datapath *get_dp(struct net *net, int dp_ifindex)
ccb1352e
JG		 123{
124 struct datapath *dp = NULL;
125 struct net_device *dev;
126
127 rcu_read_lock();
46df7b81 128 dev = dev_get_by_index_rcu(net, dp_ifindex);
ccb1352e
JG		 129 if (dev) {
130 struct vport *vport = ovs_internal_dev_get_vport(dev);
131 if (vport)
132 dp = vport->dp;
133 }
134 rcu_read_unlock();
135
136 return dp;
137}
138
8e4e1713 139/* Must be called with rcu_read_lock or ovs_mutex. */
ccb1352e
JG		 140const char *ovs_dp_name(const struct datapath *dp)
141{
8e4e1713 142 struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
ccb1352e
JG		 143 return vport->ops->get_name(vport);
144}
145
146static int get_dpifindex(struct datapath *dp)
147{
148 struct vport *local;
149 int ifindex;
150
151 rcu_read_lock();
152
15eac2a7 153 local = ovs_vport_rcu(dp, OVSP_LOCAL);
ccb1352e 154 if (local)
cff63a52 155 ifindex = netdev_vport_priv(local)->dev->ifindex;
ccb1352e
JG		 156 else
157 ifindex = 0;
158
159 rcu_read_unlock();
160
161 return ifindex;
162}
163
164static void destroy_dp_rcu(struct rcu_head *rcu)
165{
166 struct datapath *dp = container_of(rcu, struct datapath, rcu);
167
168 ovs_flow_tbl_destroy((__force struct flow_table *)dp->table);
169 free_percpu(dp->stats_percpu);
46df7b81 170 release_net(ovs_dp_get_net(dp));
15eac2a7 171 kfree(dp->ports);
ccb1352e
JG		 172 kfree(dp);
173}
174
15eac2a7
PS		 175static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
176 u16 port_no)
177{
178 return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
179}
180
181struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
182{
183 struct vport *vport;
15eac2a7
PS		 184 struct hlist_head *head;
185
186 head = vport_hash_bucket(dp, port_no);
b67bfe0d 187 hlist_for_each_entry_rcu(vport, head, dp_hash_node) {
15eac2a7
PS		 188 if (vport->port_no == port_no)
189 return vport;
190 }
191 return NULL;
192}
193
8e4e1713 194/* Called with ovs_mutex. */
ccb1352e
JG		 195static struct vport *new_vport(const struct vport_parms *parms)
196{
197 struct vport *vport;
198
199 vport = ovs_vport_add(parms);
200 if (!IS_ERR(vport)) {
201 struct datapath *dp = parms->dp;
15eac2a7 202 struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
ccb1352e 203
15eac2a7 204 hlist_add_head_rcu(&vport->dp_hash_node, head);
ccb1352e 205 }
ccb1352e
JG		 206 return vport;
207}
208
ccb1352e
JG		 209void ovs_dp_detach_port(struct vport *p)
210{
8e4e1713 211 ASSERT_OVSL();
ccb1352e
JG		 212
213 /* First drop references to device. */
15eac2a7 214 hlist_del_rcu(&p->dp_hash_node);
ccb1352e
JG		 215
216 /* Then destroy it. */
217 ovs_vport_del(p);
218}
219
220/* Must be called with rcu_read_lock. */
221void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb)
222{
223 struct datapath *dp = p->dp;
224 struct sw_flow *flow;
225 struct dp_stats_percpu *stats;
226 struct sw_flow_key key;
227 u64 *stats_counter;
228 int error;
229 int key_len;
230
404f2f10 231 stats = this_cpu_ptr(dp->stats_percpu);
ccb1352e
JG		 232
233 /* Extract flow from 'skb' into 'key'. */
234 error = ovs_flow_extract(skb, p->port_no, &key, &key_len);
235 if (unlikely(error)) {
236 kfree_skb(skb);
237 return;
238 }
239
240 /* Look up flow. */
241 flow = ovs_flow_tbl_lookup(rcu_dereference(dp->table), &key, key_len);
242 if (unlikely(!flow)) {
243 struct dp_upcall_info upcall;
244
245 upcall.cmd = OVS_PACKET_CMD_MISS;
246 upcall.key = &key;
247 upcall.userdata = NULL;
15e47304 248 upcall.portid = p->upcall_portid;
ccb1352e
JG		 249 ovs_dp_upcall(dp, skb, &upcall);
250 consume_skb(skb);
251 stats_counter = &stats->n_missed;
252 goto out;
253 }
254
255 OVS_CB(skb)->flow = flow;
256
257 stats_counter = &stats->n_hit;
258 ovs_flow_used(OVS_CB(skb)->flow, skb);
259 ovs_execute_actions(dp, skb);
260
261out:
262 /* Update datapath statistics. */
263 u64_stats_update_begin(&stats->sync);
264 (*stats_counter)++;
265 u64_stats_update_end(&stats->sync);
266}
267
268static struct genl_family dp_packet_genl_family = {
269 .id = GENL_ID_GENERATE,
270 .hdrsize = sizeof(struct ovs_header),
271 .name = OVS_PACKET_FAMILY,
272 .version = OVS_PACKET_VERSION,
46df7b81 273 .maxattr = OVS_PACKET_ATTR_MAX,
3a4e0d6a
PS		 274 .netnsok = true,
275 .parallel_ops = true,
ccb1352e
JG		 276};
277
278int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
46df7b81 279 const struct dp_upcall_info *upcall_info)
ccb1352e
JG		 280{
281 struct dp_stats_percpu *stats;
282 int dp_ifindex;
283 int err;
284
15e47304 285 if (upcall_info->portid == 0) {
ccb1352e
JG		 286 err = -ENOTCONN;
287 goto err;
288 }
289
290 dp_ifindex = get_dpifindex(dp);
291 if (!dp_ifindex) {
292 err = -ENODEV;
293 goto err;
294 }
295
296 if (!skb_is_gso(skb))
46df7b81 297 err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info);
ccb1352e 298 else
46df7b81 299 err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info);
ccb1352e
JG		 300 if (err)
301 goto err;
302
303 return 0;
304
305err:
404f2f10 306 stats = this_cpu_ptr(dp->stats_percpu);
ccb1352e
JG		 307
308 u64_stats_update_begin(&stats->sync);
309 stats->n_lost++;
310 u64_stats_update_end(&stats->sync);
311
312 return err;
313}
314
46df7b81
PS		 315static int queue_gso_packets(struct net *net, int dp_ifindex,
316 struct sk_buff *skb,
ccb1352e
JG		 317 const struct dp_upcall_info *upcall_info)
318{
a1b5d0dd 319 unsigned short gso_type = skb_shinfo(skb)->gso_type;
ccb1352e
JG		 320 struct dp_upcall_info later_info;
321 struct sw_flow_key later_key;
322 struct sk_buff *segs, *nskb;
323 int err;
324
12b0004d 325 segs = __skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM, false);
92e5dfc3
PS		 326 if (IS_ERR(segs))
327 return PTR_ERR(segs);
ccb1352e
JG		 328
329 /* Queue all of the segments. */
330 skb = segs;
331 do {
46df7b81 332 err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info);
ccb1352e
JG		 333 if (err)
334 break;
335
a1b5d0dd 336 if (skb == segs && gso_type & SKB_GSO_UDP) {
ccb1352e
JG		 337 /* The initial flow key extracted by ovs_flow_extract()
338 * in this case is for a first fragment, so we need to
339 * properly mark later fragments.
340 */
341 later_key = *upcall_info->key;
342 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
343
344 later_info = *upcall_info;
345 later_info.key = &later_key;
346 upcall_info = &later_info;
347 }
348 } while ((skb = skb->next));
349
350 /* Free all of the segments. */
351 skb = segs;
352 do {
353 nskb = skb->next;
354 if (err)
355 kfree_skb(skb);
356 else
357 consume_skb(skb);
358 } while ((skb = nskb));
359 return err;
360}
361
c3ff8cfe
TG		 362static size_t key_attr_size(void)
363{
364 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
365 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
366 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
367 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
368 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
369 + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */
370 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
371 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
372 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
373 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
374 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
375}
376
377static size_t upcall_msg_size(const struct sk_buff *skb,
378 const struct nlattr *userdata)
379{
380 size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
381 + nla_total_size(skb->len) /* OVS_PACKET_ATTR_PACKET */
382 + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */
383
384 /* OVS_PACKET_ATTR_USERDATA */
385 if (userdata)
386 size += NLA_ALIGN(userdata->nla_len);
387
388 return size;
389}
390
46df7b81
PS		 391static int queue_userspace_packet(struct net *net, int dp_ifindex,
392 struct sk_buff *skb,
ccb1352e
JG		 393 const struct dp_upcall_info *upcall_info)
394{
395 struct ovs_header *upcall;
396 struct sk_buff *nskb = NULL;
397 struct sk_buff *user_skb; /* to be queued to userspace */
398 struct nlattr *nla;
ccb1352e
JG		 399 int err;
400
401 if (vlan_tx_tag_present(skb)) {
402 nskb = skb_clone(skb, GFP_ATOMIC);
403 if (!nskb)
404 return -ENOMEM;
405
86a9bad3 406 nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb));
8aa51d64 407 if (!nskb)
ccb1352e
JG		 408 return -ENOMEM;
409
410 nskb->vlan_tci = 0;
411 skb = nskb;
412 }
413
414 if (nla_attr_size(skb->len) > USHRT_MAX) {
415 err = -EFBIG;
416 goto out;
417 }
418
c3ff8cfe 419 user_skb = genlmsg_new(upcall_msg_size(skb, upcall_info->userdata), GFP_ATOMIC);
ccb1352e
JG		 420 if (!user_skb) {
421 err = -ENOMEM;
422 goto out;
423 }
424
425 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
426 0, upcall_info->cmd);
427 upcall->dp_ifindex = dp_ifindex;
428
429 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
430 ovs_flow_to_nlattrs(upcall_info->key, user_skb);
431 nla_nest_end(user_skb, nla);
432
433 if (upcall_info->userdata)
4490108b
BP		 434 __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
435 nla_len(upcall_info->userdata),
436 nla_data(upcall_info->userdata));
ccb1352e
JG		 437
438 nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len);
439
440 skb_copy_and_csum_dev(skb, nla_data(nla));
441
a15ff76c 442 genlmsg_end(user_skb, upcall);
15e47304 443 err = genlmsg_unicast(net, user_skb, upcall_info->portid);
ccb1352e
JG		 444
445out:
446 kfree_skb(nskb);
447 return err;
448}
449
8e4e1713 450/* Called with ovs_mutex. */
46df7b81 451static int flush_flows(struct datapath *dp)
ccb1352e
JG		 452{
453 struct flow_table *old_table;
454 struct flow_table *new_table;
ccb1352e 455
8e4e1713 456 old_table = ovsl_dereference(dp->table);
ccb1352e
JG		 457 new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS);
458 if (!new_table)
459 return -ENOMEM;
460
461 rcu_assign_pointer(dp->table, new_table);
462
463 ovs_flow_tbl_deferred_destroy(old_table);
464 return 0;
465}
466
467static int validate_actions(const struct nlattr *attr,
468 const struct sw_flow_key *key, int depth);
469
470static int validate_sample(const struct nlattr *attr,
471 const struct sw_flow_key *key, int depth)
472{
473 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
474 const struct nlattr *probability, *actions;
475 const struct nlattr *a;
476 int rem;
477
478 memset(attrs, 0, sizeof(attrs));
479 nla_for_each_nested(a, attr, rem) {
480 int type = nla_type(a);
481 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
482 return -EINVAL;
483 attrs[type] = a;
484 }
485 if (rem)
486 return -EINVAL;
487
488 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
489 if (!probability || nla_len(probability) != sizeof(u32))
490 return -EINVAL;
491
492 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
493 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
494 return -EINVAL;
495 return validate_actions(actions, key, depth + 1);
496}
497
072ae631
PS		 498static int validate_tp_port(const struct sw_flow_key *flow_key)
499{
500 if (flow_key->eth.type == htons(ETH_P_IP)) {
4185392d 501 if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst)
072ae631
PS		 502 return 0;
503 } else if (flow_key->eth.type == htons(ETH_P_IPV6)) {
4185392d 504 if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst)
072ae631
PS		 505 return 0;
506 }
507
508 return -EINVAL;
509}
510
ccb1352e
JG		 511static int validate_set(const struct nlattr *a,
512 const struct sw_flow_key *flow_key)
513{
514 const struct nlattr *ovs_key = nla_data(a);
515 int key_type = nla_type(ovs_key);
516
517 /* There can be only one key in a action */
518 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
519 return -EINVAL;
520
521 if (key_type > OVS_KEY_ATTR_MAX ||
522 nla_len(ovs_key) != ovs_key_lens[key_type])
523 return -EINVAL;
524
525 switch (key_type) {
526 const struct ovs_key_ipv4 *ipv4_key;
3fdbd1ce 527 const struct ovs_key_ipv6 *ipv6_key;
ccb1352e
JG		 528
529 case OVS_KEY_ATTR_PRIORITY:
39c7caeb 530 case OVS_KEY_ATTR_SKB_MARK:
ccb1352e
JG		 531 case OVS_KEY_ATTR_ETHERNET:
532 break;
533
534 case OVS_KEY_ATTR_IPV4:
535 if (flow_key->eth.type != htons(ETH_P_IP))
536 return -EINVAL;
537
4185392d 538 if (!flow_key->ip.proto)
ccb1352e
JG		 539 return -EINVAL;
540
541 ipv4_key = nla_data(ovs_key);
542 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
543 return -EINVAL;
544
545 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
546 return -EINVAL;
547
548 break;
549
3fdbd1ce
AA		 550 case OVS_KEY_ATTR_IPV6:
551 if (flow_key->eth.type != htons(ETH_P_IPV6))
552 return -EINVAL;
553
554 if (!flow_key->ip.proto)
555 return -EINVAL;
556
557 ipv6_key = nla_data(ovs_key);
558 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
559 return -EINVAL;
560
561 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
562 return -EINVAL;
563
564 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
565 return -EINVAL;
566
567 break;
568
ccb1352e
JG		 569 case OVS_KEY_ATTR_TCP:
570 if (flow_key->ip.proto != IPPROTO_TCP)
571 return -EINVAL;
572
072ae631 573 return validate_tp_port(flow_key);
ccb1352e
JG		 574
575 case OVS_KEY_ATTR_UDP:
576 if (flow_key->ip.proto != IPPROTO_UDP)
577 return -EINVAL;
578
072ae631 579 return validate_tp_port(flow_key);
ccb1352e
JG		 580
581 default:
582 return -EINVAL;
583 }
584
585 return 0;
586}
587
588static int validate_userspace(const struct nlattr *attr)
589{
590 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
591 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
4490108b 592 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
ccb1352e
JG		 593 };
594 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
595 int error;
596
597 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
598 attr, userspace_policy);
599 if (error)
600 return error;
601
602 if (!a[OVS_USERSPACE_ATTR_PID] ||
603 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
604 return -EINVAL;
605
606 return 0;
607}
608
609static int validate_actions(const struct nlattr *attr,
610 const struct sw_flow_key *key, int depth)
611{
612 const struct nlattr *a;
613 int rem, err;
614
615 if (depth >= SAMPLE_ACTION_DEPTH)
616 return -EOVERFLOW;
617
618 nla_for_each_nested(a, attr, rem) {
619 /* Expected argument lengths, (u32)-1 for variable length. */
620 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
621 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
622 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
623 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
624 [OVS_ACTION_ATTR_POP_VLAN] = 0,
625 [OVS_ACTION_ATTR_SET] = (u32)-1,
626 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1
627 };
628 const struct ovs_action_push_vlan *vlan;
629 int type = nla_type(a);
630
631 if (type > OVS_ACTION_ATTR_MAX ||
632 (action_lens[type] != nla_len(a) &&
633 action_lens[type] != (u32)-1))
634 return -EINVAL;
635
636 switch (type) {
637 case OVS_ACTION_ATTR_UNSPEC:
638 return -EINVAL;
639
640 case OVS_ACTION_ATTR_USERSPACE:
641 err = validate_userspace(a);
642 if (err)
643 return err;
644 break;
645
646 case OVS_ACTION_ATTR_OUTPUT:
647 if (nla_get_u32(a) >= DP_MAX_PORTS)
648 return -EINVAL;
649 break;
650
651
652 case OVS_ACTION_ATTR_POP_VLAN:
653 break;
654
655 case OVS_ACTION_ATTR_PUSH_VLAN:
656 vlan = nla_data(a);
657 if (vlan->vlan_tpid != htons(ETH_P_8021Q))
658 return -EINVAL;
659 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
660 return -EINVAL;
661 break;
662
663 case OVS_ACTION_ATTR_SET:
664 err = validate_set(a, key);
665 if (err)
666 return err;
667 break;
668
669 case OVS_ACTION_ATTR_SAMPLE:
670 err = validate_sample(a, key, depth);
671 if (err)
672 return err;
673 break;
674
675 default:
676 return -EINVAL;
677 }
678 }
679
680 if (rem > 0)
681 return -EINVAL;
682
683 return 0;
684}
685
686static void clear_stats(struct sw_flow *flow)
687{
688 flow->used = 0;
689 flow->tcp_flags = 0;
690 flow->packet_count = 0;
691 flow->byte_count = 0;
692}
693
694static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
695{
696 struct ovs_header *ovs_header = info->userhdr;
697 struct nlattr **a = info->attrs;
698 struct sw_flow_actions *acts;
699 struct sk_buff *packet;
700 struct sw_flow *flow;
701 struct datapath *dp;
702 struct ethhdr *eth;
703 int len;
704 int err;
705 int key_len;
706
707 err = -EINVAL;
708 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
dded45fc 709 !a[OVS_PACKET_ATTR_ACTIONS])
ccb1352e
JG		 710 goto err;
711
712 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
713 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
714 err = -ENOMEM;
715 if (!packet)
716 goto err;
717 skb_reserve(packet, NET_IP_ALIGN);
718
32686a9d 719 nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
ccb1352e
JG		 720
721 skb_reset_mac_header(packet);
722 eth = eth_hdr(packet);
723
724 /* Normally, setting the skb 'protocol' field would be handled by a
725 * call to eth_type_trans(), but it assumes there's a sending
726 * device, which we may not have. */
e5c5d22e 727 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
ccb1352e
JG		 728 packet->protocol = eth->h_proto;
729 else
730 packet->protocol = htons(ETH_P_802_2);
731
732 /* Build an sw_flow for sending this packet. */
733 flow = ovs_flow_alloc();
734 err = PTR_ERR(flow);
735 if (IS_ERR(flow))
736 goto err_kfree_skb;
737
738 err = ovs_flow_extract(packet, -1, &flow->key, &key_len);
739 if (err)
740 goto err_flow_free;
741
93d8fd15 742 err = ovs_flow_metadata_from_nlattrs(flow, a[OVS_PACKET_ATTR_KEY]);
ccb1352e
JG		 743 if (err)
744 goto err_flow_free;
745
746 err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0);
747 if (err)
748 goto err_flow_free;
749
750 flow->hash = ovs_flow_hash(&flow->key, key_len);
751
752 acts = ovs_flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]);
753 err = PTR_ERR(acts);
754 if (IS_ERR(acts))
755 goto err_flow_free;
756 rcu_assign_pointer(flow->sf_acts, acts);
757
758 OVS_CB(packet)->flow = flow;
759 packet->priority = flow->key.phy.priority;
39c7caeb 760 packet->mark = flow->key.phy.skb_mark;
ccb1352e
JG		 761
762 rcu_read_lock();
46df7b81 763 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
ccb1352e
JG		 764 err = -ENODEV;
765 if (!dp)
766 goto err_unlock;
767
768 local_bh_disable();
769 err = ovs_execute_actions(dp, packet);
770 local_bh_enable();
771 rcu_read_unlock();
772
773 ovs_flow_free(flow);
774 return err;
775
776err_unlock:
777 rcu_read_unlock();
778err_flow_free:
779 ovs_flow_free(flow);
780err_kfree_skb:
781 kfree_skb(packet);
782err:
783 return err;
784}
785
786static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
dded45fc 787 [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
ccb1352e
JG		 788 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
789 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
790};
791
792static struct genl_ops dp_packet_genl_ops[] = {
793 { .cmd = OVS_PACKET_CMD_EXECUTE,
794 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
795 .policy = packet_policy,
796 .doit = ovs_packet_cmd_execute
797 }
798};
799
800static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats)
801{
802 int i;
8e4e1713 803 struct flow_table *table = ovsl_dereference(dp->table);
ccb1352e
JG		 804
805 stats->n_flows = ovs_flow_tbl_count(table);
806
807 stats->n_hit = stats->n_missed = stats->n_lost = 0;
808 for_each_possible_cpu(i) {
809 const struct dp_stats_percpu *percpu_stats;
810 struct dp_stats_percpu local_stats;
811 unsigned int start;
812
813 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
814
815 do {
816 start = u64_stats_fetch_begin_bh(&percpu_stats->sync);
817 local_stats = *percpu_stats;
818 } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start));
819
820 stats->n_hit += local_stats.n_hit;
821 stats->n_missed += local_stats.n_missed;
822 stats->n_lost += local_stats.n_lost;
823 }
824}
825
826static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
827 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
828 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
829 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
830};
831
832static struct genl_family dp_flow_genl_family = {
833 .id = GENL_ID_GENERATE,
834 .hdrsize = sizeof(struct ovs_header),
835 .name = OVS_FLOW_FAMILY,
836 .version = OVS_FLOW_VERSION,
46df7b81 837 .maxattr = OVS_FLOW_ATTR_MAX,
3a4e0d6a
PS		 838 .netnsok = true,
839 .parallel_ops = true,
ccb1352e
JG		 840};
841
842static struct genl_multicast_group ovs_dp_flow_multicast_group = {
843 .name = OVS_FLOW_MCGROUP
844};
845
c3ff8cfe
TG		 846static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)
847{
848 return NLMSG_ALIGN(sizeof(struct ovs_header))
849 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */
850 + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
851 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
852 + nla_total_size(8) /* OVS_FLOW_ATTR_USED */
853 + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */
854}
855
8e4e1713 856/* Called with ovs_mutex. */
ccb1352e 857static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
15e47304 858 struct sk_buff *skb, u32 portid,
ccb1352e
JG		 859 u32 seq, u32 flags, u8 cmd)
860{
861 const int skb_orig_len = skb->len;
862 const struct sw_flow_actions *sf_acts;
863 struct ovs_flow_stats stats;
864 struct ovs_header *ovs_header;
865 struct nlattr *nla;
866 unsigned long used;
867 u8 tcp_flags;
868 int err;
869
8e4e1713 870 sf_acts = ovsl_dereference(flow->sf_acts);
ccb1352e 871
15e47304 872 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd);
ccb1352e
JG		 873 if (!ovs_header)
874 return -EMSGSIZE;
875
876 ovs_header->dp_ifindex = get_dpifindex(dp);
877
878 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
879 if (!nla)
880 goto nla_put_failure;
881 err = ovs_flow_to_nlattrs(&flow->key, skb);
882 if (err)
883 goto error;
884 nla_nest_end(skb, nla);
885
886 spin_lock_bh(&flow->lock);
887 used = flow->used;
888 stats.n_packets = flow->packet_count;
889 stats.n_bytes = flow->byte_count;
890 tcp_flags = flow->tcp_flags;
891 spin_unlock_bh(&flow->lock);
892
028d6a67
DM		 893 if (used &&
894 nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used)))
895 goto nla_put_failure;
ccb1352e 896
028d6a67
DM		 897 if (stats.n_packets &&
898 nla_put(skb, OVS_FLOW_ATTR_STATS,
899 sizeof(struct ovs_flow_stats), &stats))
900 goto nla_put_failure;
ccb1352e 901
028d6a67
DM		 902 if (tcp_flags &&
903 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags))
904 goto nla_put_failure;
ccb1352e
JG		 905
906 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
907 * this is the first flow to be dumped into 'skb'. This is unusual for
908 * Netlink but individual action lists can be longer than
909 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
910 * The userspace caller can always fetch the actions separately if it
911 * really wants them. (Most userspace callers in fact don't care.)
912 *
913 * This can only fail for dump operations because the skb is always
914 * properly sized for single flows.
915 */
916 err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len,
917 sf_acts->actions);
918 if (err < 0 && skb_orig_len)
919 goto error;
920
921 return genlmsg_end(skb, ovs_header);
922
923nla_put_failure:
924 err = -EMSGSIZE;
925error:
926 genlmsg_cancel(skb, ovs_header);
927 return err;
928}
929
930static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow)
931{
932 const struct sw_flow_actions *sf_acts;
ccb1352e 933
8e4e1713 934 sf_acts = ovsl_dereference(flow->sf_acts);
ccb1352e 935
c3ff8cfe 936 return genlmsg_new(ovs_flow_cmd_msg_size(sf_acts), GFP_KERNEL);
ccb1352e
JG		 937}
938
939static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow,
940 struct datapath *dp,
15e47304 941 u32 portid, u32 seq, u8 cmd)
ccb1352e
JG		 942{
943 struct sk_buff *skb;
944 int retval;
945
946 skb = ovs_flow_cmd_alloc_info(flow);
947 if (!skb)
948 return ERR_PTR(-ENOMEM);
949
15e47304 950 retval = ovs_flow_cmd_fill_info(flow, dp, skb, portid, seq, 0, cmd);
ccb1352e
JG		 951 BUG_ON(retval < 0);
952 return skb;
953}
954
955static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
956{
957 struct nlattr **a = info->attrs;
958 struct ovs_header *ovs_header = info->userhdr;
959 struct sw_flow_key key;
960 struct sw_flow *flow;
961 struct sk_buff *reply;
962 struct datapath *dp;
963 struct flow_table *table;
964 int error;
965 int key_len;
966
967 /* Extract key. */
968 error = -EINVAL;
969 if (!a[OVS_FLOW_ATTR_KEY])
970 goto error;
971 error = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
972 if (error)
973 goto error;
974
975 /* Validate actions. */
976 if (a[OVS_FLOW_ATTR_ACTIONS]) {
977 error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0);
978 if (error)
979 goto error;
980 } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) {
981 error = -EINVAL;
982 goto error;
983 }
984
8e4e1713 985 ovs_lock();
46df7b81 986 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
ccb1352e
JG		 987 error = -ENODEV;
988 if (!dp)
8e4e1713 989 goto err_unlock_ovs;
ccb1352e 990
8e4e1713 991 table = ovsl_dereference(dp->table);
ccb1352e
JG		 992 flow = ovs_flow_tbl_lookup(table, &key, key_len);
993 if (!flow) {
994 struct sw_flow_actions *acts;
995
996 /* Bail out if we're not allowed to create a new flow. */
997 error = -ENOENT;
998 if (info->genlhdr->cmd == OVS_FLOW_CMD_SET)
8e4e1713 999 goto err_unlock_ovs;
ccb1352e
JG		 1000
1001 /* Expand table, if necessary, to make room. */
1002 if (ovs_flow_tbl_need_to_expand(table)) {
1003 struct flow_table *new_table;
1004
1005 new_table = ovs_flow_tbl_expand(table);
1006 if (!IS_ERR(new_table)) {
1007 rcu_assign_pointer(dp->table, new_table);
1008 ovs_flow_tbl_deferred_destroy(table);
8e4e1713 1009 table = ovsl_dereference(dp->table);
ccb1352e
JG		 1010 }
1011 }
1012
1013 /* Allocate flow. */
1014 flow = ovs_flow_alloc();
1015 if (IS_ERR(flow)) {
1016 error = PTR_ERR(flow);
8e4e1713 1017 goto err_unlock_ovs;
ccb1352e
JG		 1018 }
1019 flow->key = key;
1020 clear_stats(flow);
1021
1022 /* Obtain actions. */
1023 acts = ovs_flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]);
1024 error = PTR_ERR(acts);
1025 if (IS_ERR(acts))
1026 goto error_free_flow;
1027 rcu_assign_pointer(flow->sf_acts, acts);
1028
1029 /* Put flow in bucket. */
1030 flow->hash = ovs_flow_hash(&key, key_len);
1031 ovs_flow_tbl_insert(table, flow);
1032
15e47304 1033 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
ccb1352e
JG		 1034 info->snd_seq,
1035 OVS_FLOW_CMD_NEW);
1036 } else {
1037 /* We found a matching flow. */
1038 struct sw_flow_actions *old_acts;
1039 struct nlattr *acts_attrs;
1040
1041 /* Bail out if we're not allowed to modify an existing flow.
1042 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1043 * because Generic Netlink treats the latter as a dump
1044 * request. We also accept NLM_F_EXCL in case that bug ever
1045 * gets fixed.
1046 */
1047 error = -EEXIST;
1048 if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW &&
1049 info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL))
8e4e1713 1050 goto err_unlock_ovs;
ccb1352e
JG		 1051
1052 /* Update actions. */
8e4e1713 1053 old_acts = ovsl_dereference(flow->sf_acts);
ccb1352e
JG		 1054 acts_attrs = a[OVS_FLOW_ATTR_ACTIONS];
1055 if (acts_attrs &&
1056 (old_acts->actions_len != nla_len(acts_attrs) ||
1057 memcmp(old_acts->actions, nla_data(acts_attrs),
1058 old_acts->actions_len))) {
1059 struct sw_flow_actions *new_acts;
1060
1061 new_acts = ovs_flow_actions_alloc(acts_attrs);
1062 error = PTR_ERR(new_acts);
1063 if (IS_ERR(new_acts))
8e4e1713 1064 goto err_unlock_ovs;
ccb1352e
JG		 1065
1066 rcu_assign_pointer(flow->sf_acts, new_acts);
1067 ovs_flow_deferred_free_acts(old_acts);
1068 }
1069
15e47304 1070 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
ccb1352e
JG		 1071 info->snd_seq, OVS_FLOW_CMD_NEW);
1072
1073 /* Clear stats. */
1074 if (a[OVS_FLOW_ATTR_CLEAR]) {
1075 spin_lock_bh(&flow->lock);
1076 clear_stats(flow);
1077 spin_unlock_bh(&flow->lock);
1078 }
1079 }
8e4e1713 1080 ovs_unlock();
ccb1352e
JG		 1081
1082 if (!IS_ERR(reply))
ed661185 1083 ovs_notify(reply, info, &ovs_dp_flow_multicast_group);
ccb1352e 1084 else
46df7b81 1085 netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
ccb1352e
JG		 1086 ovs_dp_flow_multicast_group.id, PTR_ERR(reply));
1087 return 0;
1088
1089error_free_flow:
1090 ovs_flow_free(flow);
8e4e1713
PS		 1091err_unlock_ovs:
1092 ovs_unlock();
ccb1352e
JG		 1093error:
1094 return error;
1095}
1096
1097static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
1098{
1099 struct nlattr **a = info->attrs;
1100 struct ovs_header *ovs_header = info->userhdr;
1101 struct sw_flow_key key;
1102 struct sk_buff *reply;
1103 struct sw_flow *flow;
1104 struct datapath *dp;
1105 struct flow_table *table;
1106 int err;
1107 int key_len;
1108
1109 if (!a[OVS_FLOW_ATTR_KEY])
1110 return -EINVAL;
1111 err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
1112 if (err)
1113 return err;
1114
8e4e1713 1115 ovs_lock();
46df7b81 1116 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
8e4e1713
PS		 1117 if (!dp) {
1118 err = -ENODEV;
1119 goto unlock;
1120 }
ccb1352e 1121
8e4e1713 1122 table = ovsl_dereference(dp->table);
ccb1352e 1123 flow = ovs_flow_tbl_lookup(table, &key, key_len);
8e4e1713
PS		 1124 if (!flow) {
1125 err = -ENOENT;
1126 goto unlock;
1127 }
ccb1352e 1128
15e47304 1129 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
ccb1352e 1130 info->snd_seq, OVS_FLOW_CMD_NEW);
8e4e1713
PS		 1131 if (IS_ERR(reply)) {
1132 err = PTR_ERR(reply);
1133 goto unlock;
1134 }
ccb1352e 1135
8e4e1713 1136 ovs_unlock();
ccb1352e 1137 return genlmsg_reply(reply, info);
8e4e1713
PS		 1138unlock:
1139 ovs_unlock();
1140 return err;
ccb1352e
JG		 1141}
1142
1143static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
1144{
1145 struct nlattr **a = info->attrs;
1146 struct ovs_header *ovs_header = info->userhdr;
1147 struct sw_flow_key key;
1148 struct sk_buff *reply;
1149 struct sw_flow *flow;
1150 struct datapath *dp;
1151 struct flow_table *table;
1152 int err;
1153 int key_len;
1154
8e4e1713 1155 ovs_lock();
46df7b81 1156 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
8e4e1713
PS		 1157 if (!dp) {
1158 err = -ENODEV;
1159 goto unlock;
1160 }
46df7b81 1161
8e4e1713
PS		 1162 if (!a[OVS_FLOW_ATTR_KEY]) {
1163 err = flush_flows(dp);
1164 goto unlock;
1165 }
ccb1352e
JG		 1166 err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
1167 if (err)
8e4e1713 1168 goto unlock;
ccb1352e 1169
8e4e1713 1170 table = ovsl_dereference(dp->table);
ccb1352e 1171 flow = ovs_flow_tbl_lookup(table, &key, key_len);
8e4e1713
PS		 1172 if (!flow) {
1173 err = -ENOENT;
1174 goto unlock;
1175 }
ccb1352e
JG		 1176
1177 reply = ovs_flow_cmd_alloc_info(flow);
8e4e1713
PS		 1178 if (!reply) {
1179 err = -ENOMEM;
1180 goto unlock;
1181 }
ccb1352e
JG		 1182
1183 ovs_flow_tbl_remove(table, flow);
1184
15e47304 1185 err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid,
ccb1352e
JG		 1186 info->snd_seq, 0, OVS_FLOW_CMD_DEL);
1187 BUG_ON(err < 0);
1188
1189 ovs_flow_deferred_free(flow);
8e4e1713 1190 ovs_unlock();
ccb1352e 1191
ed661185 1192 ovs_notify(reply, info, &ovs_dp_flow_multicast_group);
ccb1352e 1193 return 0;
8e4e1713
PS		 1194unlock:
1195 ovs_unlock();
1196 return err;
ccb1352e
JG		 1197}
1198
1199static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1200{
1201 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1202 struct datapath *dp;
1203 struct flow_table *table;
1204
8e4e1713 1205 ovs_lock();
46df7b81 1206 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
8e4e1713
PS		 1207 if (!dp) {
1208 ovs_unlock();
ccb1352e 1209 return -ENODEV;
8e4e1713 1210 }
ccb1352e 1211
8e4e1713 1212 table = ovsl_dereference(dp->table);
ccb1352e
JG		 1213
1214 for (;;) {
1215 struct sw_flow *flow;
1216 u32 bucket, obj;
1217
1218 bucket = cb->args[0];
1219 obj = cb->args[1];
1220 flow = ovs_flow_tbl_next(table, &bucket, &obj);
1221 if (!flow)
1222 break;
1223
1224 if (ovs_flow_cmd_fill_info(flow, dp, skb,
15e47304 1225 NETLINK_CB(cb->skb).portid,
ccb1352e
JG		 1226 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1227 OVS_FLOW_CMD_NEW) < 0)
1228 break;
1229
1230 cb->args[0] = bucket;
1231 cb->args[1] = obj;
1232 }
8e4e1713 1233 ovs_unlock();
ccb1352e
JG		 1234 return skb->len;
1235}
1236
1237static struct genl_ops dp_flow_genl_ops[] = {
1238 { .cmd = OVS_FLOW_CMD_NEW,
1239 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1240 .policy = flow_policy,
1241 .doit = ovs_flow_cmd_new_or_set
1242 },
1243 { .cmd = OVS_FLOW_CMD_DEL,
1244 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1245 .policy = flow_policy,
1246 .doit = ovs_flow_cmd_del
1247 },
1248 { .cmd = OVS_FLOW_CMD_GET,
1249 .flags = 0, /* OK for unprivileged users. */
1250 .policy = flow_policy,
1251 .doit = ovs_flow_cmd_get,
1252 .dumpit = ovs_flow_cmd_dump
1253 },
1254 { .cmd = OVS_FLOW_CMD_SET,
1255 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1256 .policy = flow_policy,
1257 .doit = ovs_flow_cmd_new_or_set,
1258 },
1259};
1260
1261static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1262 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1263 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1264};
1265
1266static struct genl_family dp_datapath_genl_family = {
1267 .id = GENL_ID_GENERATE,
1268 .hdrsize = sizeof(struct ovs_header),
1269 .name = OVS_DATAPATH_FAMILY,
1270 .version = OVS_DATAPATH_VERSION,
46df7b81 1271 .maxattr = OVS_DP_ATTR_MAX,
3a4e0d6a
PS		 1272 .netnsok = true,
1273 .parallel_ops = true,
ccb1352e
JG		 1274};
1275
1276static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
1277 .name = OVS_DATAPATH_MCGROUP
1278};
1279
c3ff8cfe
TG		 1280static size_t ovs_dp_cmd_msg_size(void)
1281{
1282 size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header));
1283
1284 msgsize += nla_total_size(IFNAMSIZ);
1285 msgsize += nla_total_size(sizeof(struct ovs_dp_stats));
1286
1287 return msgsize;
1288}
1289
ccb1352e 1290static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
15e47304 1291 u32 portid, u32 seq, u32 flags, u8 cmd)
ccb1352e
JG		 1292{
1293 struct ovs_header *ovs_header;
1294 struct ovs_dp_stats dp_stats;
1295 int err;
1296
15e47304 1297 ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
ccb1352e
JG		 1298 flags, cmd);
1299 if (!ovs_header)
1300 goto error;
1301
1302 ovs_header->dp_ifindex = get_dpifindex(dp);
1303
1304 rcu_read_lock();
1305 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
1306 rcu_read_unlock();
1307 if (err)
1308 goto nla_put_failure;
1309
1310 get_dp_stats(dp, &dp_stats);
028d6a67
DM		 1311 if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats))
1312 goto nla_put_failure;
ccb1352e
JG		 1313
1314 return genlmsg_end(skb, ovs_header);
1315
1316nla_put_failure:
1317 genlmsg_cancel(skb, ovs_header);
1318error:
1319 return -EMSGSIZE;
1320}
1321
15e47304 1322static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 portid,
ccb1352e
JG		 1323 u32 seq, u8 cmd)
1324{
1325 struct sk_buff *skb;
1326 int retval;
1327
c3ff8cfe 1328 skb = genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL);
ccb1352e
JG		 1329 if (!skb)
1330 return ERR_PTR(-ENOMEM);
1331
15e47304 1332 retval = ovs_dp_cmd_fill_info(dp, skb, portid, seq, 0, cmd);
ccb1352e
JG		 1333 if (retval < 0) {
1334 kfree_skb(skb);
1335 return ERR_PTR(retval);
1336 }
1337 return skb;
1338}
1339
8e4e1713 1340/* Called with ovs_mutex. */
46df7b81
PS		 1341static struct datapath *lookup_datapath(struct net *net,
1342 struct ovs_header *ovs_header,
ccb1352e
JG		 1343 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1344{
1345 struct datapath *dp;
1346
1347 if (!a[OVS_DP_ATTR_NAME])
46df7b81 1348 dp = get_dp(net, ovs_header->dp_ifindex);
ccb1352e
JG		 1349 else {
1350 struct vport *vport;
1351
1352 rcu_read_lock();
46df7b81 1353 vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
ccb1352e
JG		 1354 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1355 rcu_read_unlock();
1356 }
1357 return dp ? dp : ERR_PTR(-ENODEV);
1358}
1359
1360static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1361{
1362 struct nlattr **a = info->attrs;
1363 struct vport_parms parms;
1364 struct sk_buff *reply;
1365 struct datapath *dp;
1366 struct vport *vport;
46df7b81 1367 struct ovs_net *ovs_net;
15eac2a7 1368 int err, i;
ccb1352e
JG		 1369
1370 err = -EINVAL;
1371 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1372 goto err;
1373
8e4e1713 1374 ovs_lock();
ccb1352e
JG		 1375
1376 err = -ENOMEM;
1377 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1378 if (dp == NULL)
8e4e1713 1379 goto err_unlock_ovs;
46df7b81 1380
46df7b81 1381 ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
ccb1352e
JG		 1382
1383 /* Allocate table. */
1384 err = -ENOMEM;
1385 rcu_assign_pointer(dp->table, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS));
1386 if (!dp->table)
1387 goto err_free_dp;
1388
1389 dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
1390 if (!dp->stats_percpu) {
1391 err = -ENOMEM;
1392 goto err_destroy_table;
1393 }
1394
15eac2a7
PS		 1395 dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
1396 GFP_KERNEL);
1397 if (!dp->ports) {
1398 err = -ENOMEM;
1399 goto err_destroy_percpu;
1400 }
1401
1402 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
1403 INIT_HLIST_HEAD(&dp->ports[i]);
1404
ccb1352e
JG		 1405 /* Set up our datapath device. */
1406 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1407 parms.type = OVS_VPORT_TYPE_INTERNAL;
1408 parms.options = NULL;
1409 parms.dp = dp;
1410 parms.port_no = OVSP_LOCAL;
15e47304 1411 parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]);
ccb1352e
JG		 1412
1413 vport = new_vport(&parms);
1414 if (IS_ERR(vport)) {
1415 err = PTR_ERR(vport);
1416 if (err == -EBUSY)
1417 err = -EEXIST;
1418
15eac2a7 1419 goto err_destroy_ports_array;
ccb1352e
JG		 1420 }
1421
15e47304 1422 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
ccb1352e
JG		 1423 info->snd_seq, OVS_DP_CMD_NEW);
1424 err = PTR_ERR(reply);
1425 if (IS_ERR(reply))
1426 goto err_destroy_local_port;
1427
46df7b81
PS		 1428 ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
1429 list_add_tail(&dp->list_node, &ovs_net->dps);
8e4e1713
PS		 1430
1431 ovs_unlock();
ccb1352e 1432
ed661185 1433 ovs_notify(reply, info, &ovs_dp_datapath_multicast_group);
ccb1352e
JG		 1434 return 0;
1435
1436err_destroy_local_port:
8e4e1713 1437 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
15eac2a7
PS		 1438err_destroy_ports_array:
1439 kfree(dp->ports);
ccb1352e
JG		 1440err_destroy_percpu:
1441 free_percpu(dp->stats_percpu);
1442err_destroy_table:
8e4e1713 1443 ovs_flow_tbl_destroy(ovsl_dereference(dp->table));
ccb1352e 1444err_free_dp:
46df7b81 1445 release_net(ovs_dp_get_net(dp));
ccb1352e 1446 kfree(dp);
8e4e1713
PS		 1447err_unlock_ovs:
1448 ovs_unlock();
ccb1352e
JG		 1449err:
1450 return err;
1451}
1452
8e4e1713 1453/* Called with ovs_mutex. */
46df7b81 1454static void __dp_destroy(struct datapath *dp)
ccb1352e 1455{
15eac2a7 1456 int i;
ccb1352e 1457
15eac2a7
PS		 1458 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
1459 struct vport *vport;
b67bfe0d 1460 struct hlist_node *n;
15eac2a7 1461
b67bfe0d 1462 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node)
15eac2a7
PS		 1463 if (vport->port_no != OVSP_LOCAL)
1464 ovs_dp_detach_port(vport);
1465 }
ccb1352e
JG		 1466
1467 list_del(&dp->list_node);
ccb1352e 1468
8e4e1713
PS		 1469 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1470 * all port in datapath are destroyed first before freeing datapath.
ccb1352e 1471 */
8e4e1713 1472 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
ccb1352e
JG		 1473
1474 call_rcu(&dp->rcu, destroy_dp_rcu);
46df7b81
PS		 1475}
1476
1477static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1478{
1479 struct sk_buff *reply;
1480 struct datapath *dp;
1481 int err;
1482
8e4e1713 1483 ovs_lock();
46df7b81
PS		 1484 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1485 err = PTR_ERR(dp);
1486 if (IS_ERR(dp))
8e4e1713 1487 goto unlock;
46df7b81 1488
15e47304 1489 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
46df7b81
PS		 1490 info->snd_seq, OVS_DP_CMD_DEL);
1491 err = PTR_ERR(reply);
1492 if (IS_ERR(reply))
8e4e1713 1493 goto unlock;
46df7b81
PS		 1494
1495 __dp_destroy(dp);
8e4e1713 1496 ovs_unlock();
ccb1352e 1497
ed661185 1498 ovs_notify(reply, info, &ovs_dp_datapath_multicast_group);
ccb1352e
JG		 1499
1500 return 0;
8e4e1713
PS		 1501unlock:
1502 ovs_unlock();
1503 return err;
ccb1352e
JG		 1504}
1505
1506static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1507{
1508 struct sk_buff *reply;
1509 struct datapath *dp;
1510 int err;
1511
8e4e1713 1512 ovs_lock();
46df7b81 1513 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
8e4e1713 1514 err = PTR_ERR(dp);
ccb1352e 1515 if (IS_ERR(dp))
8e4e1713 1516 goto unlock;
ccb1352e 1517
15e47304 1518 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
ccb1352e
JG		 1519 info->snd_seq, OVS_DP_CMD_NEW);
1520 if (IS_ERR(reply)) {
1521 err = PTR_ERR(reply);
46df7b81 1522 netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
ccb1352e 1523 ovs_dp_datapath_multicast_group.id, err);
8e4e1713
PS		 1524 err = 0;
1525 goto unlock;
ccb1352e
JG		 1526 }
1527
8e4e1713 1528 ovs_unlock();
ed661185 1529 ovs_notify(reply, info, &ovs_dp_datapath_multicast_group);
ccb1352e
JG		 1530
1531 return 0;
8e4e1713
PS		 1532unlock:
1533 ovs_unlock();
1534 return err;
ccb1352e
JG		 1535}
1536
1537static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1538{
1539 struct sk_buff *reply;
1540 struct datapath *dp;
8e4e1713 1541 int err;
ccb1352e 1542
8e4e1713 1543 ovs_lock();
46df7b81 1544 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
8e4e1713
PS		 1545 if (IS_ERR(dp)) {
1546 err = PTR_ERR(dp);
1547 goto unlock;
1548 }
ccb1352e 1549
15e47304 1550 reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
ccb1352e 1551 info->snd_seq, OVS_DP_CMD_NEW);
8e4e1713
PS		 1552 if (IS_ERR(reply)) {
1553 err = PTR_ERR(reply);
1554 goto unlock;
1555 }
ccb1352e 1556
8e4e1713 1557 ovs_unlock();
ccb1352e 1558 return genlmsg_reply(reply, info);
8e4e1713
PS		 1559
1560unlock:
1561 ovs_unlock();
1562 return err;
ccb1352e
JG		 1563}
1564
1565static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1566{
46df7b81 1567 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
ccb1352e
JG		 1568 struct datapath *dp;
1569 int skip = cb->args[0];
1570 int i = 0;
1571
8e4e1713 1572 ovs_lock();
46df7b81 1573 list_for_each_entry(dp, &ovs_net->dps, list_node) {
77676fdb 1574 if (i >= skip &&
15e47304 1575 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
ccb1352e
JG		 1576 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1577 OVS_DP_CMD_NEW) < 0)
1578 break;
1579 i++;
1580 }
8e4e1713 1581 ovs_unlock();
ccb1352e
JG		 1582
1583 cb->args[0] = i;
1584
1585 return skb->len;
1586}
1587
1588static struct genl_ops dp_datapath_genl_ops[] = {
1589 { .cmd = OVS_DP_CMD_NEW,
1590 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1591 .policy = datapath_policy,
1592 .doit = ovs_dp_cmd_new
1593 },
1594 { .cmd = OVS_DP_CMD_DEL,
1595 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1596 .policy = datapath_policy,
1597 .doit = ovs_dp_cmd_del
1598 },
1599 { .cmd = OVS_DP_CMD_GET,
1600 .flags = 0, /* OK for unprivileged users. */
1601 .policy = datapath_policy,
1602 .doit = ovs_dp_cmd_get,
1603 .dumpit = ovs_dp_cmd_dump
1604 },
1605 { .cmd = OVS_DP_CMD_SET,
1606 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1607 .policy = datapath_policy,
1608 .doit = ovs_dp_cmd_set,
1609 },
1610};
1611
1612static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1613 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1614 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1615 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1616 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1617 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1618 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1619};
1620
1621static struct genl_family dp_vport_genl_family = {
1622 .id = GENL_ID_GENERATE,
1623 .hdrsize = sizeof(struct ovs_header),
1624 .name = OVS_VPORT_FAMILY,
1625 .version = OVS_VPORT_VERSION,
46df7b81 1626 .maxattr = OVS_VPORT_ATTR_MAX,
3a4e0d6a
PS		 1627 .netnsok = true,
1628 .parallel_ops = true,
ccb1352e
JG		 1629};
1630
1631struct genl_multicast_group ovs_dp_vport_multicast_group = {
1632 .name = OVS_VPORT_MCGROUP
1633};
1634
8e4e1713 1635/* Called with ovs_mutex or RCU read lock. */
ccb1352e 1636static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
15e47304 1637 u32 portid, u32 seq, u32 flags, u8 cmd)
ccb1352e
JG		 1638{
1639 struct ovs_header *ovs_header;
1640 struct ovs_vport_stats vport_stats;
1641 int err;
1642
15e47304 1643 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
ccb1352e
JG		 1644 flags, cmd);
1645 if (!ovs_header)
1646 return -EMSGSIZE;
1647
1648 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1649
028d6a67
DM		 1650 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
1651 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
1652 nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) ||
15e47304 1653 nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid))
028d6a67 1654 goto nla_put_failure;
ccb1352e
JG		 1655
1656 ovs_vport_get_stats(vport, &vport_stats);
028d6a67
DM		 1657 if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
1658 &vport_stats))
1659 goto nla_put_failure;
ccb1352e
JG		 1660
1661 err = ovs_vport_get_options(vport, skb);
1662 if (err == -EMSGSIZE)
1663 goto error;
1664
1665 return genlmsg_end(skb, ovs_header);
1666
1667nla_put_failure:
1668 err = -EMSGSIZE;
1669error:
1670 genlmsg_cancel(skb, ovs_header);
1671 return err;
1672}
1673
8e4e1713 1674/* Called with ovs_mutex or RCU read lock. */
15e47304 1675struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid,
ccb1352e
JG		 1676 u32 seq, u8 cmd)
1677{
1678 struct sk_buff *skb;
1679 int retval;
1680
1681 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1682 if (!skb)
1683 return ERR_PTR(-ENOMEM);
1684
15e47304 1685 retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd);
a9341512
JG		 1686 BUG_ON(retval < 0);
1687
ccb1352e
JG		 1688 return skb;
1689}
1690
8e4e1713 1691/* Called with ovs_mutex or RCU read lock. */
46df7b81
PS		 1692static struct vport *lookup_vport(struct net *net,
1693 struct ovs_header *ovs_header,
ccb1352e
JG		 1694 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1695{
1696 struct datapath *dp;
1697 struct vport *vport;
1698
1699 if (a[OVS_VPORT_ATTR_NAME]) {
46df7b81 1700 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
ccb1352e
JG		 1701 if (!vport)
1702 return ERR_PTR(-ENODEV);
651a68ea
BP		 1703 if (ovs_header->dp_ifindex &&
1704 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
1705 return ERR_PTR(-ENODEV);
ccb1352e
JG		 1706 return vport;
1707 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1708 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1709
1710 if (port_no >= DP_MAX_PORTS)
1711 return ERR_PTR(-EFBIG);
1712
46df7b81 1713 dp = get_dp(net, ovs_header->dp_ifindex);
ccb1352e
JG		 1714 if (!dp)
1715 return ERR_PTR(-ENODEV);
1716
8e4e1713 1717 vport = ovs_vport_ovsl_rcu(dp, port_no);
ccb1352e 1718 if (!vport)
14408dba 1719 return ERR_PTR(-ENODEV);
ccb1352e
JG		 1720 return vport;
1721 } else
1722 return ERR_PTR(-EINVAL);
1723}
1724
1725static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1726{
1727 struct nlattr **a = info->attrs;
1728 struct ovs_header *ovs_header = info->userhdr;
1729 struct vport_parms parms;
1730 struct sk_buff *reply;
1731 struct vport *vport;
1732 struct datapath *dp;
1733 u32 port_no;
1734 int err;
1735
1736 err = -EINVAL;
1737 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1738 !a[OVS_VPORT_ATTR_UPCALL_PID])
1739 goto exit;
1740
8e4e1713 1741 ovs_lock();
46df7b81 1742 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
ccb1352e
JG		 1743 err = -ENODEV;
1744 if (!dp)
1745 goto exit_unlock;
1746
1747 if (a[OVS_VPORT_ATTR_PORT_NO]) {
1748 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1749
1750 err = -EFBIG;
1751 if (port_no >= DP_MAX_PORTS)
1752 goto exit_unlock;
1753
8e4e1713 1754 vport = ovs_vport_ovsl(dp, port_no);
ccb1352e
JG		 1755 err = -EBUSY;
1756 if (vport)
1757 goto exit_unlock;
1758 } else {
1759 for (port_no = 1; ; port_no++) {
1760 if (port_no >= DP_MAX_PORTS) {
1761 err = -EFBIG;
1762 goto exit_unlock;
1763 }
8e4e1713 1764 vport = ovs_vport_ovsl(dp, port_no);
ccb1352e
JG		 1765 if (!vport)
1766 break;
1767 }
1768 }
1769
1770 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1771 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1772 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1773 parms.dp = dp;
1774 parms.port_no = port_no;
15e47304 1775 parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
ccb1352e
JG		 1776
1777 vport = new_vport(&parms);
1778 err = PTR_ERR(vport);
1779 if (IS_ERR(vport))
1780 goto exit_unlock;
1781
cb7c5bdf 1782 err = 0;
15e47304 1783 reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq,
ccb1352e
JG		 1784 OVS_VPORT_CMD_NEW);
1785 if (IS_ERR(reply)) {
1786 err = PTR_ERR(reply);
1787 ovs_dp_detach_port(vport);
1788 goto exit_unlock;
1789 }
ed661185
TG		 1790
1791 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
ccb1352e
JG		 1792
1793exit_unlock:
8e4e1713 1794 ovs_unlock();
ccb1352e
JG		 1795exit:
1796 return err;
1797}
1798
1799static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1800{
1801 struct nlattr **a = info->attrs;
1802 struct sk_buff *reply;
1803 struct vport *vport;
1804 int err;
1805
8e4e1713 1806 ovs_lock();
46df7b81 1807 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
ccb1352e
JG		 1808 err = PTR_ERR(vport);
1809 if (IS_ERR(vport))
1810 goto exit_unlock;
1811
ccb1352e 1812 if (a[OVS_VPORT_ATTR_TYPE] &&
f44f3408 1813 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
ccb1352e 1814 err = -EINVAL;
f44f3408
JG		 1815 goto exit_unlock;
1816 }
ccb1352e 1817
a9341512
JG		 1818 reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1819 if (!reply) {
1820 err = -ENOMEM;
1821 goto exit_unlock;
1822 }
1823
f44f3408 1824 if (a[OVS_VPORT_ATTR_OPTIONS]) {
ccb1352e 1825 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
f44f3408
JG		 1826 if (err)
1827 goto exit_free;
1828 }
a9341512 1829
03fbf8b3 1830 if (a[OVS_VPORT_ATTR_UPCALL_PID])
15e47304 1831 vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
ccb1352e 1832
a9341512
JG		 1833 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1834 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1835 BUG_ON(err < 0);
ccb1352e 1836
8e4e1713 1837 ovs_unlock();
ed661185 1838 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
8e4e1713 1839 return 0;
ccb1352e 1840
a9341512
JG		 1841 rtnl_unlock();
1842 return 0;
1843
1844exit_free:
1845 kfree_skb(reply);
ccb1352e 1846exit_unlock:
8e4e1713 1847 ovs_unlock();
ccb1352e
JG		 1848 return err;
1849}
1850
1851static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1852{
1853 struct nlattr **a = info->attrs;
1854 struct sk_buff *reply;
1855 struct vport *vport;
1856 int err;
1857
8e4e1713 1858 ovs_lock();
46df7b81 1859 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
ccb1352e
JG		 1860 err = PTR_ERR(vport);
1861 if (IS_ERR(vport))
1862 goto exit_unlock;
1863
1864 if (vport->port_no == OVSP_LOCAL) {
1865 err = -EINVAL;
1866 goto exit_unlock;
1867 }
1868
15e47304 1869 reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq,
ccb1352e
JG		 1870 OVS_VPORT_CMD_DEL);
1871 err = PTR_ERR(reply);
1872 if (IS_ERR(reply))
1873 goto exit_unlock;
1874
734907e8 1875 err = 0;
ccb1352e
JG		 1876 ovs_dp_detach_port(vport);
1877
ed661185 1878 ovs_notify(reply, info, &ovs_dp_vport_multicast_group);
ccb1352e
JG		 1879
1880exit_unlock:
8e4e1713 1881 ovs_unlock();
ccb1352e
JG		 1882 return err;
1883}
1884
1885static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1886{
1887 struct nlattr **a = info->attrs;
1888 struct ovs_header *ovs_header = info->userhdr;
1889 struct sk_buff *reply;
1890 struct vport *vport;
1891 int err;
1892
1893 rcu_read_lock();
46df7b81 1894 vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
ccb1352e
JG		 1895 err = PTR_ERR(vport);
1896 if (IS_ERR(vport))
1897 goto exit_unlock;
1898
15e47304 1899 reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq,
ccb1352e
JG		 1900 OVS_VPORT_CMD_NEW);
1901 err = PTR_ERR(reply);
1902 if (IS_ERR(reply))
1903 goto exit_unlock;
1904
1905 rcu_read_unlock();
1906
1907 return genlmsg_reply(reply, info);
1908
1909exit_unlock:
1910 rcu_read_unlock();
1911 return err;
1912}
1913
1914static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1915{
1916 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1917 struct datapath *dp;
15eac2a7
PS		 1918 int bucket = cb->args[0], skip = cb->args[1];
1919 int i, j = 0;
ccb1352e 1920
46df7b81 1921 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
ccb1352e
JG		 1922 if (!dp)
1923 return -ENODEV;
1924
1925 rcu_read_lock();
15eac2a7 1926 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
ccb1352e 1927 struct vport *vport;
15eac2a7
PS		 1928
1929 j = 0;
b67bfe0d 1930 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
15eac2a7
PS		 1931 if (j >= skip &&
1932 ovs_vport_cmd_fill_info(vport, skb,
15e47304 1933 NETLINK_CB(cb->skb).portid,
15eac2a7
PS		 1934 cb->nlh->nlmsg_seq,
1935 NLM_F_MULTI,
1936 OVS_VPORT_CMD_NEW) < 0)
1937 goto out;
1938
1939 j++;
1940 }
1941 skip = 0;
ccb1352e 1942 }
15eac2a7 1943out:
ccb1352e
JG		 1944 rcu_read_unlock();
1945
15eac2a7
PS		 1946 cb->args[0] = i;
1947 cb->args[1] = j;
ccb1352e 1948
15eac2a7 1949 return skb->len;
ccb1352e
JG		 1950}
1951
ccb1352e
JG		 1952static struct genl_ops dp_vport_genl_ops[] = {
1953 { .cmd = OVS_VPORT_CMD_NEW,
1954 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1955 .policy = vport_policy,
1956 .doit = ovs_vport_cmd_new
1957 },
1958 { .cmd = OVS_VPORT_CMD_DEL,
1959 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1960 .policy = vport_policy,
1961 .doit = ovs_vport_cmd_del
1962 },
1963 { .cmd = OVS_VPORT_CMD_GET,
1964 .flags = 0, /* OK for unprivileged users. */
1965 .policy = vport_policy,
1966 .doit = ovs_vport_cmd_get,
1967 .dumpit = ovs_vport_cmd_dump
1968 },
1969 { .cmd = OVS_VPORT_CMD_SET,
1970 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1971 .policy = vport_policy,
1972 .doit = ovs_vport_cmd_set,
1973 },
1974};
1975
1976struct genl_family_and_ops {
1977 struct genl_family *family;
1978 struct genl_ops *ops;
1979 int n_ops;
1980 struct genl_multicast_group *group;
1981};
1982
1983static const struct genl_family_and_ops dp_genl_families[] = {
1984 { &dp_datapath_genl_family,
1985 dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops),
1986 &ovs_dp_datapath_multicast_group },
1987 { &dp_vport_genl_family,
1988 dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops),
1989 &ovs_dp_vport_multicast_group },
1990 { &dp_flow_genl_family,
1991 dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops),
1992 &ovs_dp_flow_multicast_group },
1993 { &dp_packet_genl_family,
1994 dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops),
1995 NULL },
1996};
1997
1998static void dp_unregister_genl(int n_families)
1999{
2000 int i;
2001
2002 for (i = 0; i < n_families; i++)
2003 genl_unregister_family(dp_genl_families[i].family);
2004}
2005
2006static int dp_register_genl(void)
2007{
2008 int n_registered;
2009 int err;
2010 int i;
2011
2012 n_registered = 0;
2013 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
2014 const struct genl_family_and_ops *f = &dp_genl_families[i];
2015
2016 err = genl_register_family_with_ops(f->family, f->ops,
2017 f->n_ops);
2018 if (err)
2019 goto error;
2020 n_registered++;
2021
2022 if (f->group) {
2023 err = genl_register_mc_group(f->family, f->group);
2024 if (err)
2025 goto error;
2026 }
2027 }
2028
2029 return 0;
2030
2031error:
2032 dp_unregister_genl(n_registered);
2033 return err;
2034}
2035
46df7b81
PS		 2036static void rehash_flow_table(struct work_struct *work)
2037{
2038 struct datapath *dp;
2039 struct net *net;
2040
8e4e1713 2041 ovs_lock();
46df7b81
PS		 2042 rtnl_lock();
2043 for_each_net(net) {
2044 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2045
2046 list_for_each_entry(dp, &ovs_net->dps, list_node) {
8e4e1713 2047 struct flow_table *old_table = ovsl_dereference(dp->table);
46df7b81
PS		 2048 struct flow_table *new_table;
2049
2050 new_table = ovs_flow_tbl_rehash(old_table);
2051 if (!IS_ERR(new_table)) {
2052 rcu_assign_pointer(dp->table, new_table);
2053 ovs_flow_tbl_deferred_destroy(old_table);
2054 }
2055 }
2056 }
2057 rtnl_unlock();
8e4e1713 2058 ovs_unlock();
46df7b81
PS		 2059 schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL);
2060}
2061
2062static int __net_init ovs_init_net(struct net *net)
2063{
2064 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2065
2066 INIT_LIST_HEAD(&ovs_net->dps);
8e4e1713 2067 INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
46df7b81
PS		 2068 return 0;
2069}
2070
2071static void __net_exit ovs_exit_net(struct net *net)
2072{
46df7b81 2073 struct datapath *dp, *dp_next;
8e4e1713 2074 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
46df7b81 2075
8e4e1713 2076 ovs_lock();
46df7b81
PS		 2077 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
2078 __dp_destroy(dp);
8e4e1713
PS		 2079 ovs_unlock();
2080
2081 cancel_work_sync(&ovs_net->dp_notify_work);
46df7b81
PS		 2082}
2083
2084static struct pernet_operations ovs_net_ops = {
2085 .init = ovs_init_net,
2086 .exit = ovs_exit_net,
2087 .id = &ovs_net_id,
2088 .size = sizeof(struct ovs_net),
2089};
2090
ccb1352e
JG		 2091static int __init dp_init(void)
2092{
ccb1352e
JG		 2093 int err;
2094
3523b29b 2095 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
ccb1352e
JG		 2096
2097 pr_info("Open vSwitch switching datapath\n");
2098
2099 err = ovs_flow_init();
2100 if (err)
2101 goto error;
2102
2103 err = ovs_vport_init();
2104 if (err)
2105 goto error_flow_exit;
2106
46df7b81 2107 err = register_pernet_device(&ovs_net_ops);
ccb1352e
JG		 2108 if (err)
2109 goto error_vport_exit;
2110
46df7b81
PS		 2111 err = register_netdevice_notifier(&ovs_dp_device_notifier);
2112 if (err)
2113 goto error_netns_exit;
2114
ccb1352e
JG		 2115 err = dp_register_genl();
2116 if (err < 0)
2117 goto error_unreg_notifier;
2118
2119 schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL);
2120
2121 return 0;
2122
2123error_unreg_notifier:
2124 unregister_netdevice_notifier(&ovs_dp_device_notifier);
46df7b81
PS		 2125error_netns_exit:
2126 unregister_pernet_device(&ovs_net_ops);
ccb1352e
JG		 2127error_vport_exit:
2128 ovs_vport_exit();
2129error_flow_exit:
2130 ovs_flow_exit();
2131error:
2132 return err;
2133}
2134
2135static void dp_cleanup(void)
2136{
2137 cancel_delayed_work_sync(&rehash_flow_wq);
ccb1352e
JG		 2138 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
2139 unregister_netdevice_notifier(&ovs_dp_device_notifier);
46df7b81
PS		 2140 unregister_pernet_device(&ovs_net_ops);
2141 rcu_barrier();
ccb1352e
JG		 2142 ovs_vport_exit();
2143 ovs_flow_exit();
2144}
2145
2146module_init(dp_init);
2147module_exit(dp_cleanup);
2148
2149MODULE_DESCRIPTION("Open vSwitch switching datapath");
2150MODULE_LICENSE("GPL");
A mirror of Linus' kernel repository