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1 | /* | |
2 | * Copyright (c) 2007-2015 Nicira, Inc. | |
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> | |
39 | #include <linux/version.h> | |
40 | #include <linux/ethtool.h> | |
41 | #include <linux/wait.h> | |
42 | #include <asm/div64.h> | |
43 | #include <linux/highmem.h> | |
44 | #include <linux/netfilter_bridge.h> | |
45 | #include <linux/netfilter_ipv4.h> | |
46 | #include <linux/inetdevice.h> | |
47 | #include <linux/list.h> | |
48 | #include <linux/openvswitch.h> | |
49 | #include <linux/rculist.h> | |
50 | #include <linux/dmi.h> | |
51 | #include <net/genetlink.h> | |
52 | #include <net/net_namespace.h> | |
53 | #include <net/netns/generic.h> | |
54 | #include <net/nsh.h> | |
55 | ||
56 | #include "datapath.h" | |
57 | #include "conntrack.h" | |
58 | #include "flow.h" | |
59 | #include "flow_table.h" | |
60 | #include "flow_netlink.h" | |
61 | #include "meter.h" | |
62 | #include "gso.h" | |
63 | #include "vport-internal_dev.h" | |
64 | #include "vport-netdev.h" | |
65 | ||
66 | unsigned int ovs_net_id __read_mostly; | |
67 | ||
68 | static struct genl_family dp_packet_genl_family; | |
69 | static struct genl_family dp_flow_genl_family; | |
70 | static struct genl_family dp_datapath_genl_family; | |
71 | ||
72 | static const struct nla_policy flow_policy[]; | |
73 | ||
74 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { | |
75 | .name = OVS_FLOW_MCGROUP, | |
76 | }; | |
77 | ||
78 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { | |
79 | .name = OVS_DATAPATH_MCGROUP, | |
80 | }; | |
81 | ||
82 | const struct genl_multicast_group ovs_dp_vport_multicast_group = { | |
83 | .name = OVS_VPORT_MCGROUP, | |
84 | }; | |
85 | ||
86 | /* Check if need to build a reply message. | |
87 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. | |
88 | */ | |
89 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, | |
90 | unsigned int group) | |
91 | { | |
92 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
93 | genl_has_listeners(family, genl_info_net(info), group); | |
94 | } | |
95 | ||
96 | static void ovs_notify(struct genl_family *family, | |
97 | const struct genl_multicast_group *grp, | |
98 | struct sk_buff *skb, struct genl_info *info) | |
99 | { | |
100 | genl_notify(family, skb, info, GROUP_ID(grp), GFP_KERNEL); | |
101 | } | |
102 | ||
103 | /** | |
104 | * DOC: Locking: | |
105 | * | |
106 | * All writes e.g. Writes to device state (add/remove datapath, port, set | |
107 | * operations on vports, etc.), Writes to other state (flow table | |
108 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
109 | * by ovs_lock. | |
110 | * | |
111 | * Reads are protected by RCU. | |
112 | * | |
113 | * There are a few special cases (mostly stats) that have their own | |
114 | * synchronization but they nest under all of above and don't interact with | |
115 | * each other. | |
116 | * | |
117 | * The RTNL lock nests inside ovs_mutex. | |
118 | */ | |
119 | ||
120 | static DEFINE_MUTEX(ovs_mutex); | |
121 | ||
122 | void ovs_lock(void) | |
123 | { | |
124 | mutex_lock(&ovs_mutex); | |
125 | } | |
126 | ||
127 | void ovs_unlock(void) | |
128 | { | |
129 | mutex_unlock(&ovs_mutex); | |
130 | } | |
131 | ||
132 | #ifdef CONFIG_LOCKDEP | |
133 | int lockdep_ovsl_is_held(void) | |
134 | { | |
135 | if (debug_locks) | |
136 | return lockdep_is_held(&ovs_mutex); | |
137 | else | |
138 | return 1; | |
139 | } | |
140 | #endif | |
141 | ||
142 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, | |
143 | const struct sw_flow_key *, | |
144 | const struct dp_upcall_info *, | |
145 | uint32_t cutlen); | |
146 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, | |
147 | const struct sw_flow_key *, | |
148 | const struct dp_upcall_info *, | |
149 | uint32_t cutlen); | |
150 | ||
151 | /* Must be called with rcu_read_lock or ovs_mutex. */ | |
152 | const char *ovs_dp_name(const struct datapath *dp) | |
153 | { | |
154 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); | |
155 | return ovs_vport_name(vport); | |
156 | } | |
157 | ||
158 | static int get_dpifindex(const struct datapath *dp) | |
159 | { | |
160 | struct vport *local; | |
161 | int ifindex; | |
162 | ||
163 | rcu_read_lock(); | |
164 | ||
165 | local = ovs_vport_rcu(dp, OVSP_LOCAL); | |
166 | if (local) | |
167 | ifindex = local->dev->ifindex; | |
168 | else | |
169 | ifindex = 0; | |
170 | ||
171 | rcu_read_unlock(); | |
172 | ||
173 | return ifindex; | |
174 | } | |
175 | ||
176 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
177 | { | |
178 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
179 | ||
180 | ovs_flow_tbl_destroy(&dp->table); | |
181 | free_percpu(dp->stats_percpu); | |
182 | kfree(dp->ports); | |
183 | ovs_meters_exit(dp); | |
184 | kfree(dp); | |
185 | } | |
186 | ||
187 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, | |
188 | u16 port_no) | |
189 | { | |
190 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
191 | } | |
192 | ||
193 | /* Called with ovs_mutex or RCU read lock. */ | |
194 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) | |
195 | { | |
196 | struct vport *vport; | |
197 | struct hlist_head *head; | |
198 | ||
199 | head = vport_hash_bucket(dp, port_no); | |
200 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { | |
201 | if (vport->port_no == port_no) | |
202 | return vport; | |
203 | } | |
204 | return NULL; | |
205 | } | |
206 | ||
207 | /* Called with ovs_mutex. */ | |
208 | static struct vport *new_vport(const struct vport_parms *parms) | |
209 | { | |
210 | struct vport *vport; | |
211 | ||
212 | vport = ovs_vport_add(parms); | |
213 | if (!IS_ERR(vport)) { | |
214 | struct datapath *dp = parms->dp; | |
215 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); | |
216 | ||
217 | hlist_add_head_rcu(&vport->dp_hash_node, head); | |
218 | } | |
219 | return vport; | |
220 | } | |
221 | ||
222 | void ovs_dp_detach_port(struct vport *p) | |
223 | { | |
224 | ASSERT_OVSL(); | |
225 | ||
226 | /* First drop references to device. */ | |
227 | hlist_del_rcu(&p->dp_hash_node); | |
228 | ||
229 | /* Then destroy it. */ | |
230 | ovs_vport_del(p); | |
231 | } | |
232 | ||
233 | /* Must be called with rcu_read_lock. */ | |
234 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) | |
235 | { | |
236 | const struct vport *p = OVS_CB(skb)->input_vport; | |
237 | struct datapath *dp = p->dp; | |
238 | struct sw_flow *flow; | |
239 | struct sw_flow_actions *sf_acts; | |
240 | struct dp_stats_percpu *stats; | |
241 | u64 *stats_counter; | |
242 | u32 n_mask_hit; | |
243 | int error; | |
244 | ||
245 | stats = this_cpu_ptr(dp->stats_percpu); | |
246 | ||
247 | /* Look up flow. */ | |
248 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), | |
249 | &n_mask_hit); | |
250 | if (unlikely(!flow)) { | |
251 | struct dp_upcall_info upcall; | |
252 | ||
253 | memset(&upcall, 0, sizeof(upcall)); | |
254 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
255 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); | |
256 | upcall.mru = OVS_CB(skb)->mru; | |
257 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); | |
258 | if (unlikely(error)) | |
259 | kfree_skb(skb); | |
260 | else | |
261 | consume_skb(skb); | |
262 | stats_counter = &stats->n_missed; | |
263 | goto out; | |
264 | } | |
265 | ||
266 | ovs_flow_stats_update(flow, key->tp.flags, skb); | |
267 | sf_acts = rcu_dereference(flow->sf_acts); | |
268 | error = ovs_execute_actions(dp, skb, sf_acts, key); | |
269 | if (unlikely(error)) | |
270 | net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n", | |
271 | ovs_dp_name(dp), error); | |
272 | ||
273 | stats_counter = &stats->n_hit; | |
274 | ||
275 | out: | |
276 | /* Update datapath statistics. */ | |
277 | u64_stats_update_begin(&stats->syncp); | |
278 | (*stats_counter)++; | |
279 | stats->n_mask_hit += n_mask_hit; | |
280 | u64_stats_update_end(&stats->syncp); | |
281 | } | |
282 | ||
283 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, | |
284 | const struct sw_flow_key *key, | |
285 | const struct dp_upcall_info *upcall_info, | |
286 | uint32_t cutlen) | |
287 | { | |
288 | struct dp_stats_percpu *stats; | |
289 | int err; | |
290 | ||
291 | if (upcall_info->portid == 0) { | |
292 | err = -ENOTCONN; | |
293 | goto err; | |
294 | } | |
295 | ||
296 | if (!skb_is_gso(skb)) | |
297 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); | |
298 | else | |
299 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); | |
300 | if (err) | |
301 | goto err; | |
302 | ||
303 | return 0; | |
304 | ||
305 | err: | |
306 | stats = this_cpu_ptr(dp->stats_percpu); | |
307 | ||
308 | u64_stats_update_begin(&stats->syncp); | |
309 | stats->n_lost++; | |
310 | u64_stats_update_end(&stats->syncp); | |
311 | ||
312 | return err; | |
313 | } | |
314 | ||
315 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, | |
316 | const struct sw_flow_key *key, | |
317 | const struct dp_upcall_info *upcall_info, | |
318 | uint32_t cutlen) | |
319 | { | |
320 | #ifdef HAVE_SKB_GSO_UDP | |
321 | unsigned int gso_type = skb_shinfo(skb)->gso_type; | |
322 | struct sw_flow_key later_key; | |
323 | #endif | |
324 | struct sk_buff *segs, *nskb; | |
325 | struct ovs_skb_cb ovs_cb; | |
326 | int err; | |
327 | ||
328 | ovs_cb = *OVS_CB(skb); | |
329 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); | |
330 | *OVS_CB(skb) = ovs_cb; | |
331 | if (IS_ERR(segs)) | |
332 | return PTR_ERR(segs); | |
333 | if (segs == NULL) | |
334 | return -EINVAL; | |
335 | #ifdef HAVE_SKB_GSO_UDP | |
336 | if (gso_type & SKB_GSO_UDP) { | |
337 | /* The initial flow key extracted by ovs_flow_key_extract() | |
338 | * in this case is for a first fragment, so we need to | |
339 | * properly mark later fragments. | |
340 | */ | |
341 | later_key = *key; | |
342 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
343 | } | |
344 | #endif | |
345 | /* Queue all of the segments. */ | |
346 | skb_list_walk_safe(segs, skb, nskb) { | |
347 | *OVS_CB(skb) = ovs_cb; | |
348 | #ifdef HAVE_SKB_GSO_UDP | |
349 | if (gso_type & SKB_GSO_UDP && skb != segs) | |
350 | key = &later_key; | |
351 | #endif | |
352 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); | |
353 | if (err) | |
354 | break; | |
355 | ||
356 | } | |
357 | ||
358 | /* Free all of the segments. */ | |
359 | skb_list_walk_safe(segs, skb, nskb) { | |
360 | if (err) | |
361 | kfree_skb(skb); | |
362 | else | |
363 | consume_skb(skb); | |
364 | } | |
365 | return err; | |
366 | } | |
367 | ||
368 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, | |
369 | unsigned int hdrlen, int actions_attrlen) | |
370 | { | |
371 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
372 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ | |
373 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ | |
374 | + nla_total_size(sizeof(unsigned int)) /* OVS_PACKET_ATTR_LEN */ | |
375 | + nla_total_size(sizeof(u64)); /* OVS_PACKET_ATTR_HASH */ | |
376 | ||
377 | /* OVS_PACKET_ATTR_USERDATA */ | |
378 | if (upcall_info->userdata) | |
379 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
380 | ||
381 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
382 | if (upcall_info->egress_tun_info) | |
383 | size += nla_total_size(ovs_tun_key_attr_size()); | |
384 | ||
385 | /* OVS_PACKET_ATTR_ACTIONS */ | |
386 | if (upcall_info->actions_len) | |
387 | size += nla_total_size(actions_attrlen); | |
388 | ||
389 | /* OVS_PACKET_ATTR_MRU */ | |
390 | if (upcall_info->mru) | |
391 | size += nla_total_size(sizeof(upcall_info->mru)); | |
392 | ||
393 | return size; | |
394 | } | |
395 | ||
396 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) | |
397 | { | |
398 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
399 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
400 | ||
401 | if (plen > 0) | |
402 | skb_put_zero(skb, plen); | |
403 | } | |
404 | } | |
405 | ||
406 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, | |
407 | const struct sw_flow_key *key, | |
408 | const struct dp_upcall_info *upcall_info, | |
409 | uint32_t cutlen) | |
410 | { | |
411 | struct ovs_header *upcall; | |
412 | struct sk_buff *nskb = NULL; | |
413 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ | |
414 | struct nlattr *nla; | |
415 | size_t len; | |
416 | unsigned int hlen; | |
417 | int err, dp_ifindex; | |
418 | u64 hash; | |
419 | ||
420 | dp_ifindex = get_dpifindex(dp); | |
421 | if (!dp_ifindex) | |
422 | return -ENODEV; | |
423 | ||
424 | if (skb_vlan_tag_present(skb)) { | |
425 | nskb = skb_clone(skb, GFP_ATOMIC); | |
426 | if (!nskb) | |
427 | return -ENOMEM; | |
428 | ||
429 | nskb = __vlan_hwaccel_push_inside(nskb); | |
430 | if (!nskb) | |
431 | return -ENOMEM; | |
432 | ||
433 | skb = nskb; | |
434 | } | |
435 | ||
436 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
437 | err = -EFBIG; | |
438 | goto out; | |
439 | } | |
440 | ||
441 | /* Complete checksum if needed */ | |
442 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
443 | (err = skb_csum_hwoffload_help(skb, 0))) | |
444 | goto out; | |
445 | ||
446 | /* Older versions of OVS user space enforce alignment of the last | |
447 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
448 | * padding logic. Only perform zerocopy if padding is not required. | |
449 | */ | |
450 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
451 | hlen = skb_zerocopy_headlen(skb); | |
452 | else | |
453 | hlen = skb->len; | |
454 | ||
455 | len = upcall_msg_size(upcall_info, hlen - cutlen, | |
456 | OVS_CB(skb)->acts_origlen); | |
457 | user_skb = genlmsg_new(len, GFP_ATOMIC); | |
458 | if (!user_skb) { | |
459 | err = -ENOMEM; | |
460 | goto out; | |
461 | } | |
462 | ||
463 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
464 | 0, upcall_info->cmd); | |
465 | if (!upcall) { | |
466 | err = -EINVAL; | |
467 | goto out; | |
468 | } | |
469 | upcall->dp_ifindex = dp_ifindex; | |
470 | ||
471 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); | |
472 | if (err) | |
473 | goto out; | |
474 | ||
475 | if (upcall_info->userdata) | |
476 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, | |
477 | nla_len(upcall_info->userdata), | |
478 | nla_data(upcall_info->userdata)); | |
479 | ||
480 | ||
481 | if (upcall_info->egress_tun_info) { | |
482 | nla = nla_nest_start_noflag(user_skb, | |
483 | OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
484 | if (!nla) { | |
485 | err = -EMSGSIZE; | |
486 | goto out; | |
487 | } | |
488 | err = ovs_nla_put_tunnel_info(user_skb, | |
489 | upcall_info->egress_tun_info); | |
490 | if (err) | |
491 | goto out; | |
492 | ||
493 | nla_nest_end(user_skb, nla); | |
494 | } | |
495 | ||
496 | if (upcall_info->actions_len) { | |
497 | nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS); | |
498 | if (!nla) { | |
499 | err = -EMSGSIZE; | |
500 | goto out; | |
501 | } | |
502 | err = ovs_nla_put_actions(upcall_info->actions, | |
503 | upcall_info->actions_len, | |
504 | user_skb); | |
505 | if (!err) | |
506 | nla_nest_end(user_skb, nla); | |
507 | else | |
508 | nla_nest_cancel(user_skb, nla); | |
509 | } | |
510 | ||
511 | /* Add OVS_PACKET_ATTR_MRU */ | |
512 | if (upcall_info->mru && | |
513 | nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, upcall_info->mru)) { | |
514 | err = -ENOBUFS; | |
515 | goto out; | |
516 | } | |
517 | ||
518 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ | |
519 | if (cutlen > 0 && | |
520 | nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, skb->len)) { | |
521 | err = -ENOBUFS; | |
522 | goto out; | |
523 | } | |
524 | ||
525 | /* Add OVS_PACKET_ATTR_HASH */ | |
526 | hash = skb_get_hash_raw(skb); | |
527 | #ifdef HAVE_SW_HASH | |
528 | if (skb->sw_hash) | |
529 | hash |= OVS_PACKET_HASH_SW_BIT; | |
530 | #endif | |
531 | ||
532 | if (skb->l4_hash) | |
533 | hash |= OVS_PACKET_HASH_L4_BIT; | |
534 | ||
535 | if (nla_put(user_skb, OVS_PACKET_ATTR_HASH, sizeof (u64), &hash)) { | |
536 | err = -ENOBUFS; | |
537 | goto out; | |
538 | } | |
539 | ||
540 | /* Only reserve room for attribute header, packet data is added | |
541 | * in skb_zerocopy() | |
542 | */ | |
543 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
544 | err = -ENOBUFS; | |
545 | goto out; | |
546 | } | |
547 | nla->nla_len = nla_attr_size(skb->len - cutlen); | |
548 | ||
549 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); | |
550 | if (err) | |
551 | goto out; | |
552 | ||
553 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ | |
554 | pad_packet(dp, user_skb); | |
555 | ||
556 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; | |
557 | ||
558 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); | |
559 | user_skb = NULL; | |
560 | out: | |
561 | if (err) | |
562 | skb_tx_error(skb); | |
563 | kfree_skb(user_skb); | |
564 | kfree_skb(nskb); | |
565 | return err; | |
566 | } | |
567 | ||
568 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) | |
569 | { | |
570 | struct ovs_header *ovs_header = info->userhdr; | |
571 | struct net *net = sock_net(skb->sk); | |
572 | struct nlattr **a = info->attrs; | |
573 | struct sw_flow_actions *acts; | |
574 | struct sk_buff *packet; | |
575 | struct sw_flow *flow; | |
576 | struct sw_flow_actions *sf_acts; | |
577 | struct datapath *dp; | |
578 | struct vport *input_vport; | |
579 | u16 mru = 0; | |
580 | u64 hash; | |
581 | int len; | |
582 | int err; | |
583 | bool log = !a[OVS_PACKET_ATTR_PROBE]; | |
584 | ||
585 | err = -EINVAL; | |
586 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
587 | !a[OVS_PACKET_ATTR_ACTIONS]) | |
588 | goto err; | |
589 | ||
590 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
591 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
592 | err = -ENOMEM; | |
593 | if (!packet) | |
594 | goto err; | |
595 | skb_reserve(packet, NET_IP_ALIGN); | |
596 | ||
597 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); | |
598 | ||
599 | /* Set packet's mru */ | |
600 | if (a[OVS_PACKET_ATTR_MRU]) { | |
601 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
602 | packet->ignore_df = 1; | |
603 | } | |
604 | OVS_CB(packet)->mru = mru; | |
605 | ||
606 | if (a[OVS_PACKET_ATTR_HASH]) { | |
607 | hash = nla_get_u64(a[OVS_PACKET_ATTR_HASH]); | |
608 | ||
609 | __skb_set_hash(packet, hash & 0xFFFFFFFFULL, | |
610 | !!(hash & OVS_PACKET_HASH_SW_BIT), | |
611 | !!(hash & OVS_PACKET_HASH_L4_BIT)); | |
612 | } | |
613 | ||
614 | /* Build an sw_flow for sending this packet. */ | |
615 | flow = ovs_flow_alloc(); | |
616 | err = PTR_ERR(flow); | |
617 | if (IS_ERR(flow)) | |
618 | goto err_kfree_skb; | |
619 | ||
620 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], | |
621 | packet, &flow->key, log); | |
622 | if (err) | |
623 | goto err_flow_free; | |
624 | ||
625 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], | |
626 | &flow->key, &acts, log); | |
627 | if (err) | |
628 | goto err_flow_free; | |
629 | ||
630 | rcu_assign_pointer(flow->sf_acts, acts); | |
631 | packet->priority = flow->key.phy.priority; | |
632 | packet->mark = flow->key.phy.skb_mark; | |
633 | ||
634 | rcu_read_lock(); | |
635 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); | |
636 | err = -ENODEV; | |
637 | if (!dp) | |
638 | goto err_unlock; | |
639 | ||
640 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); | |
641 | if (!input_vport) | |
642 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
643 | ||
644 | if (!input_vport) | |
645 | goto err_unlock; | |
646 | ||
647 | packet->dev = input_vport->dev; | |
648 | OVS_CB(packet)->input_vport = input_vport; | |
649 | sf_acts = rcu_dereference(flow->sf_acts); | |
650 | ||
651 | local_bh_disable(); | |
652 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); | |
653 | local_bh_enable(); | |
654 | rcu_read_unlock(); | |
655 | ||
656 | ovs_flow_free(flow, false); | |
657 | return err; | |
658 | ||
659 | err_unlock: | |
660 | rcu_read_unlock(); | |
661 | err_flow_free: | |
662 | ovs_flow_free(flow, false); | |
663 | err_kfree_skb: | |
664 | kfree_skb(packet); | |
665 | err: | |
666 | return err; | |
667 | } | |
668 | ||
669 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
670 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, | |
671 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, | |
672 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
673 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, | |
674 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, | |
675 | [OVS_PACKET_ATTR_HASH] = { .type = NLA_U64 }, | |
676 | }; | |
677 | ||
678 | static struct genl_ops dp_packet_genl_ops[] = { | |
679 | { .cmd = OVS_PACKET_CMD_EXECUTE, | |
680 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
681 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
682 | #endif | |
683 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
684 | #ifdef HAVE_GENL_OPS_POLICY | |
685 | .policy = packet_policy, | |
686 | #endif | |
687 | .doit = ovs_packet_cmd_execute | |
688 | } | |
689 | }; | |
690 | ||
691 | static struct genl_family dp_packet_genl_family __ro_after_init = { | |
692 | .hdrsize = sizeof(struct ovs_header), | |
693 | .name = OVS_PACKET_FAMILY, | |
694 | .version = OVS_PACKET_VERSION, | |
695 | .maxattr = OVS_PACKET_ATTR_MAX, | |
696 | #ifndef HAVE_GENL_OPS_POLICY | |
697 | .policy = packet_policy, | |
698 | #endif | |
699 | .netnsok = true, | |
700 | .parallel_ops = true, | |
701 | .ops = dp_packet_genl_ops, | |
702 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
703 | .module = THIS_MODULE, | |
704 | }; | |
705 | ||
706 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, | |
707 | struct ovs_dp_megaflow_stats *mega_stats) | |
708 | { | |
709 | int i; | |
710 | ||
711 | memset(mega_stats, 0, sizeof(*mega_stats)); | |
712 | ||
713 | stats->n_flows = ovs_flow_tbl_count(&dp->table); | |
714 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); | |
715 | ||
716 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
717 | ||
718 | for_each_possible_cpu(i) { | |
719 | const struct dp_stats_percpu *percpu_stats; | |
720 | struct dp_stats_percpu local_stats; | |
721 | unsigned int start; | |
722 | ||
723 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
724 | ||
725 | do { | |
726 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); | |
727 | local_stats = *percpu_stats; | |
728 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); | |
729 | ||
730 | stats->n_hit += local_stats.n_hit; | |
731 | stats->n_missed += local_stats.n_missed; | |
732 | stats->n_lost += local_stats.n_lost; | |
733 | mega_stats->n_mask_hit += local_stats.n_mask_hit; | |
734 | } | |
735 | } | |
736 | ||
737 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) | |
738 | { | |
739 | return ovs_identifier_is_ufid(sfid) && | |
740 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
741 | } | |
742 | ||
743 | static bool should_fill_mask(uint32_t ufid_flags) | |
744 | { | |
745 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
746 | } | |
747 | ||
748 | static bool should_fill_actions(uint32_t ufid_flags) | |
749 | { | |
750 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); | |
751 | } | |
752 | ||
753 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
754 | const struct sw_flow_id *sfid, | |
755 | uint32_t ufid_flags) | |
756 | { | |
757 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
758 | ||
759 | /* OVS_FLOW_ATTR_UFID, or unmasked flow key as fallback | |
760 | * see ovs_nla_put_identifier() | |
761 | */ | |
762 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
763 | len += nla_total_size(sfid->ufid_len); | |
764 | else | |
765 | len += nla_total_size(ovs_key_attr_size()); | |
766 | ||
767 | /* OVS_FLOW_ATTR_KEY */ | |
768 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
769 | len += nla_total_size(ovs_key_attr_size()); | |
770 | ||
771 | /* OVS_FLOW_ATTR_MASK */ | |
772 | if (should_fill_mask(ufid_flags)) | |
773 | len += nla_total_size(ovs_key_attr_size()); | |
774 | ||
775 | /* OVS_FLOW_ATTR_ACTIONS */ | |
776 | if (should_fill_actions(ufid_flags)) | |
777 | len += nla_total_size(acts->orig_len); | |
778 | ||
779 | return len | |
780 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ | |
781 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
782 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ | |
783 | } | |
784 | ||
785 | /* Called with ovs_mutex or RCU read lock. */ | |
786 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
787 | struct sk_buff *skb) | |
788 | { | |
789 | struct ovs_flow_stats stats; | |
790 | __be16 tcp_flags; | |
791 | unsigned long used; | |
792 | ||
793 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); | |
794 | ||
795 | if (used && | |
796 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), | |
797 | OVS_FLOW_ATTR_PAD)) | |
798 | return -EMSGSIZE; | |
799 | ||
800 | if (stats.n_packets && | |
801 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, | |
802 | sizeof(struct ovs_flow_stats), &stats, | |
803 | OVS_FLOW_ATTR_PAD)) | |
804 | return -EMSGSIZE; | |
805 | ||
806 | if ((u8)ntohs(tcp_flags) && | |
807 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
808 | return -EMSGSIZE; | |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
813 | /* Called with ovs_mutex or RCU read lock. */ | |
814 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
815 | struct sk_buff *skb, int skb_orig_len) | |
816 | { | |
817 | struct nlattr *start; | |
818 | int err; | |
819 | ||
820 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
821 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
822 | * Netlink but individual action lists can be longer than | |
823 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
824 | * The userspace caller can always fetch the actions separately if it | |
825 | * really wants them. (Most userspace callers in fact don't care.) | |
826 | * | |
827 | * This can only fail for dump operations because the skb is always | |
828 | * properly sized for single flows. | |
829 | */ | |
830 | start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS); | |
831 | if (start) { | |
832 | const struct sw_flow_actions *sf_acts; | |
833 | ||
834 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); | |
835 | err = ovs_nla_put_actions(sf_acts->actions, | |
836 | sf_acts->actions_len, skb); | |
837 | ||
838 | if (!err) | |
839 | nla_nest_end(skb, start); | |
840 | else { | |
841 | if (skb_orig_len) | |
842 | return err; | |
843 | ||
844 | nla_nest_cancel(skb, start); | |
845 | } | |
846 | } else if (skb_orig_len) { | |
847 | return -EMSGSIZE; | |
848 | } | |
849 | ||
850 | return 0; | |
851 | } | |
852 | ||
853 | /* Called with ovs_mutex or RCU read lock. */ | |
854 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
855 | struct sk_buff *skb, u32 portid, | |
856 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) | |
857 | { | |
858 | const int skb_orig_len = skb->len; | |
859 | struct ovs_header *ovs_header; | |
860 | int err; | |
861 | ||
862 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
863 | flags, cmd); | |
864 | if (!ovs_header) | |
865 | return -EMSGSIZE; | |
866 | ||
867 | ovs_header->dp_ifindex = dp_ifindex; | |
868 | ||
869 | err = ovs_nla_put_identifier(flow, skb); | |
870 | if (err) | |
871 | goto error; | |
872 | ||
873 | if (should_fill_key(&flow->id, ufid_flags)) { | |
874 | err = ovs_nla_put_masked_key(flow, skb); | |
875 | if (err) | |
876 | goto error; | |
877 | } | |
878 | ||
879 | if (should_fill_mask(ufid_flags)) { | |
880 | err = ovs_nla_put_mask(flow, skb); | |
881 | if (err) | |
882 | goto error; | |
883 | } | |
884 | ||
885 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
886 | if (err) | |
887 | goto error; | |
888 | ||
889 | if (should_fill_actions(ufid_flags)) { | |
890 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
891 | if (err) | |
892 | goto error; | |
893 | } | |
894 | ||
895 | genlmsg_end(skb, ovs_header); | |
896 | return 0; | |
897 | ||
898 | error: | |
899 | genlmsg_cancel(skb, ovs_header); | |
900 | return err; | |
901 | } | |
902 | ||
903 | /* May not be called with RCU read lock. */ | |
904 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
905 | const struct sw_flow_id *sfid, | |
906 | struct genl_info *info, | |
907 | bool always, | |
908 | uint32_t ufid_flags) | |
909 | { | |
910 | struct sk_buff *skb; | |
911 | size_t len; | |
912 | ||
913 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, | |
914 | GROUP_ID(&ovs_dp_flow_multicast_group))) | |
915 | return NULL; | |
916 | ||
917 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); | |
918 | skb = genlmsg_new(len, GFP_KERNEL); | |
919 | if (!skb) | |
920 | return ERR_PTR(-ENOMEM); | |
921 | ||
922 | return skb; | |
923 | } | |
924 | ||
925 | /* Called with ovs_mutex. */ | |
926 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
927 | int dp_ifindex, | |
928 | struct genl_info *info, u8 cmd, | |
929 | bool always, u32 ufid_flags) | |
930 | { | |
931 | struct sk_buff *skb; | |
932 | int retval; | |
933 | ||
934 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), | |
935 | &flow->id, info, always, ufid_flags); | |
936 | if (IS_ERR_OR_NULL(skb)) | |
937 | return skb; | |
938 | ||
939 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, | |
940 | info->snd_portid, info->snd_seq, 0, | |
941 | cmd, ufid_flags); | |
942 | if (WARN_ON_ONCE(retval < 0)) { | |
943 | kfree_skb(skb); | |
944 | skb = ERR_PTR(retval); | |
945 | } | |
946 | return skb; | |
947 | } | |
948 | ||
949 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
950 | { | |
951 | struct net *net = sock_net(skb->sk); | |
952 | struct nlattr **a = info->attrs; | |
953 | struct ovs_header *ovs_header = info->userhdr; | |
954 | struct sw_flow *flow = NULL, *new_flow; | |
955 | struct sw_flow_mask mask; | |
956 | struct sk_buff *reply; | |
957 | struct datapath *dp; | |
958 | struct sw_flow_actions *acts; | |
959 | struct sw_flow_match match; | |
960 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
961 | int error; | |
962 | bool log = !a[OVS_FLOW_ATTR_PROBE]; | |
963 | ||
964 | /* Must have key and actions. */ | |
965 | error = -EINVAL; | |
966 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
967 | OVS_NLERR(log, "Flow key attr not present in new flow."); | |
968 | goto error; | |
969 | } | |
970 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
971 | OVS_NLERR(log, "Flow actions attr not present in new flow."); | |
972 | goto error; | |
973 | } | |
974 | ||
975 | /* Most of the time we need to allocate a new flow, do it before | |
976 | * locking. | |
977 | */ | |
978 | new_flow = ovs_flow_alloc(); | |
979 | if (IS_ERR(new_flow)) { | |
980 | error = PTR_ERR(new_flow); | |
981 | goto error; | |
982 | } | |
983 | ||
984 | /* Extract key. */ | |
985 | ovs_match_init(&match, &new_flow->key, false, &mask); | |
986 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], | |
987 | a[OVS_FLOW_ATTR_MASK], log); | |
988 | if (error) | |
989 | goto err_kfree_flow; | |
990 | ||
991 | /* Extract flow identifier. */ | |
992 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
993 | &new_flow->key, log); | |
994 | if (error) | |
995 | goto err_kfree_flow; | |
996 | ||
997 | /* unmasked key is needed to match when ufid is not used. */ | |
998 | if (ovs_identifier_is_key(&new_flow->id)) | |
999 | match.key = new_flow->id.unmasked_key; | |
1000 | ||
1001 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
1002 | ||
1003 | /* Validate actions. */ | |
1004 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], | |
1005 | &new_flow->key, &acts, log); | |
1006 | if (error) { | |
1007 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); | |
1008 | goto err_kfree_flow; | |
1009 | } | |
1010 | ||
1011 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, | |
1012 | ufid_flags); | |
1013 | if (IS_ERR(reply)) { | |
1014 | error = PTR_ERR(reply); | |
1015 | goto err_kfree_acts; | |
1016 | } | |
1017 | ||
1018 | ovs_lock(); | |
1019 | dp = get_dp(net, ovs_header->dp_ifindex); | |
1020 | if (unlikely(!dp)) { | |
1021 | error = -ENODEV; | |
1022 | goto err_unlock_ovs; | |
1023 | } | |
1024 | ||
1025 | /* Check if this is a duplicate flow */ | |
1026 | if (ovs_identifier_is_ufid(&new_flow->id)) | |
1027 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
1028 | if (!flow) | |
1029 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); | |
1030 | if (likely(!flow)) { | |
1031 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
1032 | ||
1033 | /* Put flow in bucket. */ | |
1034 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); | |
1035 | if (unlikely(error)) { | |
1036 | acts = NULL; | |
1037 | goto err_unlock_ovs; | |
1038 | } | |
1039 | ||
1040 | if (unlikely(reply)) { | |
1041 | error = ovs_flow_cmd_fill_info(new_flow, | |
1042 | ovs_header->dp_ifindex, | |
1043 | reply, info->snd_portid, | |
1044 | info->snd_seq, 0, | |
1045 | OVS_FLOW_CMD_NEW, | |
1046 | ufid_flags); | |
1047 | BUG_ON(error < 0); | |
1048 | } | |
1049 | ovs_unlock(); | |
1050 | } else { | |
1051 | struct sw_flow_actions *old_acts; | |
1052 | ||
1053 | /* Bail out if we're not allowed to modify an existing flow. | |
1054 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1055 | * because Generic Netlink treats the latter as a dump | |
1056 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1057 | * gets fixed. | |
1058 | */ | |
1059 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE | |
1060 | | NLM_F_EXCL))) { | |
1061 | error = -EEXIST; | |
1062 | goto err_unlock_ovs; | |
1063 | } | |
1064 | /* The flow identifier has to be the same for flow updates. | |
1065 | * Look for any overlapping flow. | |
1066 | */ | |
1067 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1068 | if (ovs_identifier_is_key(&flow->id)) | |
1069 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1070 | &match); | |
1071 | else /* UFID matches but key is different */ | |
1072 | flow = NULL; | |
1073 | if (!flow) { | |
1074 | error = -ENOENT; | |
1075 | goto err_unlock_ovs; | |
1076 | } | |
1077 | } | |
1078 | /* Update actions. */ | |
1079 | old_acts = ovsl_dereference(flow->sf_acts); | |
1080 | rcu_assign_pointer(flow->sf_acts, acts); | |
1081 | ||
1082 | if (unlikely(reply)) { | |
1083 | error = ovs_flow_cmd_fill_info(flow, | |
1084 | ovs_header->dp_ifindex, | |
1085 | reply, info->snd_portid, | |
1086 | info->snd_seq, 0, | |
1087 | OVS_FLOW_CMD_NEW, | |
1088 | ufid_flags); | |
1089 | BUG_ON(error < 0); | |
1090 | } | |
1091 | ovs_unlock(); | |
1092 | ||
1093 | ovs_nla_free_flow_actions_rcu(old_acts); | |
1094 | ovs_flow_free(new_flow, false); | |
1095 | } | |
1096 | ||
1097 | if (reply) | |
1098 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); | |
1099 | return 0; | |
1100 | ||
1101 | err_unlock_ovs: | |
1102 | ovs_unlock(); | |
1103 | kfree_skb(reply); | |
1104 | err_kfree_acts: | |
1105 | ovs_nla_free_flow_actions(acts); | |
1106 | err_kfree_flow: | |
1107 | ovs_flow_free(new_flow, false); | |
1108 | error: | |
1109 | return error; | |
1110 | } | |
1111 | ||
1112 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ | |
1113 | static noinline_for_stack struct sw_flow_actions *get_flow_actions(struct net *net, | |
1114 | const struct nlattr *a, | |
1115 | const struct sw_flow_key *key, | |
1116 | const struct sw_flow_mask *mask, | |
1117 | bool log) | |
1118 | { | |
1119 | struct sw_flow_actions *acts; | |
1120 | struct sw_flow_key masked_key; | |
1121 | int error; | |
1122 | ||
1123 | ovs_flow_mask_key(&masked_key, key, true, mask); | |
1124 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); | |
1125 | if (error) { | |
1126 | OVS_NLERR(log, | |
1127 | "Actions may not be safe on all matching packets"); | |
1128 | return ERR_PTR(error); | |
1129 | } | |
1130 | ||
1131 | return acts; | |
1132 | } | |
1133 | ||
1134 | /* Factor out match-init and action-copy to avoid | |
1135 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1136 | * used to get actions, we new a function to save some | |
1137 | * stack space. | |
1138 | * | |
1139 | * If there are not key and action attrs, we return 0 | |
1140 | * directly. In the case, the caller will also not use the | |
1141 | * match as before. If there is action attr, we try to get | |
1142 | * actions and save them to *acts. Before returning from | |
1143 | * the function, we reset the match->mask pointer. Because | |
1144 | * we should not to return match object with dangling reference | |
1145 | * to mask. | |
1146 | * */ | |
1147 | static noinline_for_stack int | |
1148 | ovs_nla_init_match_and_action(struct net *net, | |
1149 | struct sw_flow_match *match, | |
1150 | struct sw_flow_key *key, | |
1151 | struct nlattr **a, | |
1152 | struct sw_flow_actions **acts, | |
1153 | bool log) | |
1154 | { | |
1155 | struct sw_flow_mask mask; | |
1156 | int error = 0; | |
1157 | ||
1158 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1159 | ovs_match_init(match, key, true, &mask); | |
1160 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1161 | a[OVS_FLOW_ATTR_MASK], log); | |
1162 | if (error) | |
1163 | goto error; | |
1164 | } | |
1165 | ||
1166 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1167 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1168 | OVS_NLERR(log, | |
1169 | "Flow key attribute not present in set flow."); | |
1170 | error = -EINVAL; | |
1171 | goto error; | |
1172 | } | |
1173 | ||
1174 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1175 | &mask, log); | |
1176 | if (IS_ERR(*acts)) { | |
1177 | error = PTR_ERR(*acts); | |
1178 | goto error; | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | /* On success, error is 0. */ | |
1183 | error: | |
1184 | match->mask = NULL; | |
1185 | return error; | |
1186 | } | |
1187 | ||
1188 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1189 | { | |
1190 | struct net *net = sock_net(skb->sk); | |
1191 | struct nlattr **a = info->attrs; | |
1192 | struct ovs_header *ovs_header = info->userhdr; | |
1193 | struct sw_flow_key key; | |
1194 | struct sw_flow *flow; | |
1195 | struct sk_buff *reply = NULL; | |
1196 | struct datapath *dp; | |
1197 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; | |
1198 | struct sw_flow_match match; | |
1199 | struct sw_flow_id sfid; | |
1200 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1201 | int error = 0; | |
1202 | bool log = !a[OVS_FLOW_ATTR_PROBE]; | |
1203 | bool ufid_present; | |
1204 | ||
1205 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); | |
1206 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { | |
1207 | OVS_NLERR(log, | |
1208 | "Flow set message rejected, Key attribute missing."); | |
1209 | return -EINVAL; | |
1210 | } | |
1211 | ||
1212 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1213 | &acts, log); | |
1214 | if (error) | |
1215 | goto error; | |
1216 | ||
1217 | if (acts) { | |
1218 | /* Can allocate before locking if have acts. */ | |
1219 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, | |
1220 | ufid_flags); | |
1221 | if (IS_ERR(reply)) { | |
1222 | error = PTR_ERR(reply); | |
1223 | goto err_kfree_acts; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | ovs_lock(); | |
1228 | dp = get_dp(net, ovs_header->dp_ifindex); | |
1229 | if (unlikely(!dp)) { | |
1230 | error = -ENODEV; | |
1231 | goto err_unlock_ovs; | |
1232 | } | |
1233 | /* Check that the flow exists. */ | |
1234 | if (ufid_present) | |
1235 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1236 | else | |
1237 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
1238 | if (unlikely(!flow)) { | |
1239 | error = -ENOENT; | |
1240 | goto err_unlock_ovs; | |
1241 | } | |
1242 | ||
1243 | /* Update actions, if present. */ | |
1244 | if (likely(acts)) { | |
1245 | old_acts = ovsl_dereference(flow->sf_acts); | |
1246 | rcu_assign_pointer(flow->sf_acts, acts); | |
1247 | ||
1248 | if (unlikely(reply)) { | |
1249 | error = ovs_flow_cmd_fill_info(flow, | |
1250 | ovs_header->dp_ifindex, | |
1251 | reply, info->snd_portid, | |
1252 | info->snd_seq, 0, | |
1253 | OVS_FLOW_CMD_SET, | |
1254 | ufid_flags); | |
1255 | BUG_ON(error < 0); | |
1256 | } | |
1257 | } else { | |
1258 | /* Could not alloc without acts before locking. */ | |
1259 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
1260 | info, OVS_FLOW_CMD_SET, false, | |
1261 | ufid_flags); | |
1262 | ||
1263 | if (unlikely(IS_ERR(reply))) { | |
1264 | error = PTR_ERR(reply); | |
1265 | goto err_unlock_ovs; | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | /* Clear stats. */ | |
1270 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1271 | ovs_flow_stats_clear(flow); | |
1272 | ovs_unlock(); | |
1273 | ||
1274 | if (reply) | |
1275 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); | |
1276 | if (old_acts) | |
1277 | ovs_nla_free_flow_actions_rcu(old_acts); | |
1278 | ||
1279 | return 0; | |
1280 | ||
1281 | err_unlock_ovs: | |
1282 | ovs_unlock(); | |
1283 | kfree_skb(reply); | |
1284 | err_kfree_acts: | |
1285 | ovs_nla_free_flow_actions(acts); | |
1286 | error: | |
1287 | return error; | |
1288 | } | |
1289 | ||
1290 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1291 | { | |
1292 | struct nlattr **a = info->attrs; | |
1293 | struct ovs_header *ovs_header = info->userhdr; | |
1294 | struct net *net = sock_net(skb->sk); | |
1295 | struct sw_flow_key key; | |
1296 | struct sk_buff *reply; | |
1297 | struct sw_flow *flow; | |
1298 | struct datapath *dp; | |
1299 | struct sw_flow_match match; | |
1300 | struct sw_flow_id ufid; | |
1301 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1302 | int err = 0; | |
1303 | bool log = !a[OVS_FLOW_ATTR_PROBE]; | |
1304 | bool ufid_present; | |
1305 | ||
1306 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); | |
1307 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1308 | ovs_match_init(&match, &key, true, NULL); | |
1309 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, | |
1310 | log); | |
1311 | } else if (!ufid_present) { | |
1312 | OVS_NLERR(log, | |
1313 | "Flow get message rejected, Key attribute missing."); | |
1314 | err = -EINVAL; | |
1315 | } | |
1316 | if (err) | |
1317 | return err; | |
1318 | ||
1319 | ovs_lock(); | |
1320 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
1321 | if (!dp) { | |
1322 | err = -ENODEV; | |
1323 | goto unlock; | |
1324 | } | |
1325 | ||
1326 | if (ufid_present) | |
1327 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1328 | else | |
1329 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
1330 | if (!flow) { | |
1331 | err = -ENOENT; | |
1332 | goto unlock; | |
1333 | } | |
1334 | ||
1335 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, | |
1336 | OVS_FLOW_CMD_GET, true, ufid_flags); | |
1337 | if (IS_ERR(reply)) { | |
1338 | err = PTR_ERR(reply); | |
1339 | goto unlock; | |
1340 | } | |
1341 | ||
1342 | ovs_unlock(); | |
1343 | return genlmsg_reply(reply, info); | |
1344 | unlock: | |
1345 | ovs_unlock(); | |
1346 | return err; | |
1347 | } | |
1348 | ||
1349 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1350 | { | |
1351 | struct nlattr **a = info->attrs; | |
1352 | struct ovs_header *ovs_header = info->userhdr; | |
1353 | struct net *net = sock_net(skb->sk); | |
1354 | struct sw_flow_key key; | |
1355 | struct sk_buff *reply; | |
1356 | struct sw_flow *flow = NULL; | |
1357 | struct datapath *dp; | |
1358 | struct sw_flow_match match; | |
1359 | struct sw_flow_id ufid; | |
1360 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1361 | int err; | |
1362 | bool log = !a[OVS_FLOW_ATTR_PROBE]; | |
1363 | bool ufid_present; | |
1364 | ||
1365 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); | |
1366 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1367 | ovs_match_init(&match, &key, true, NULL); | |
1368 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], | |
1369 | NULL, log); | |
1370 | if (unlikely(err)) | |
1371 | return err; | |
1372 | } | |
1373 | ||
1374 | ovs_lock(); | |
1375 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
1376 | if (unlikely(!dp)) { | |
1377 | err = -ENODEV; | |
1378 | goto unlock; | |
1379 | } | |
1380 | ||
1381 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { | |
1382 | err = ovs_flow_tbl_flush(&dp->table); | |
1383 | goto unlock; | |
1384 | } | |
1385 | ||
1386 | if (ufid_present) | |
1387 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1388 | else | |
1389 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
1390 | if (unlikely(!flow)) { | |
1391 | err = -ENOENT; | |
1392 | goto unlock; | |
1393 | } | |
1394 | ||
1395 | ovs_flow_tbl_remove(&dp->table, flow); | |
1396 | ovs_unlock(); | |
1397 | ||
1398 | reply = ovs_flow_cmd_alloc_info(rcu_dereference_raw(flow->sf_acts), | |
1399 | &flow->id, info, false, ufid_flags); | |
1400 | ||
1401 | if (likely(reply)) { | |
1402 | if (!IS_ERR(reply)) { | |
1403 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1404 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1405 | reply, info->snd_portid, | |
1406 | info->snd_seq, 0, | |
1407 | OVS_FLOW_CMD_DEL, | |
1408 | ufid_flags); | |
1409 | rcu_read_unlock(); | |
1410 | if (WARN_ON_ONCE(err < 0)) { | |
1411 | kfree_skb(reply); | |
1412 | goto out_free; | |
1413 | } | |
1414 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); | |
1415 | } else { | |
1416 | genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0, | |
1417 | GROUP_ID(&ovs_dp_flow_multicast_group), PTR_ERR(reply)); | |
1418 | ||
1419 | } | |
1420 | } | |
1421 | ||
1422 | out_free: | |
1423 | ovs_flow_free(flow, true); | |
1424 | return 0; | |
1425 | unlock: | |
1426 | ovs_unlock(); | |
1427 | return err; | |
1428 | } | |
1429 | ||
1430 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1431 | { | |
1432 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; | |
1433 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
1434 | struct table_instance *ti; | |
1435 | struct datapath *dp; | |
1436 | u32 ufid_flags; | |
1437 | int err; | |
1438 | ||
1439 | err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a, | |
1440 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); | |
1441 | if (err) | |
1442 | return err; | |
1443 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1444 | ||
1445 | rcu_read_lock(); | |
1446 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); | |
1447 | if (!dp) { | |
1448 | rcu_read_unlock(); | |
1449 | return -ENODEV; | |
1450 | } | |
1451 | ||
1452 | ti = rcu_dereference(dp->table.ti); | |
1453 | for (;;) { | |
1454 | struct sw_flow *flow; | |
1455 | u32 bucket, obj; | |
1456 | ||
1457 | bucket = cb->args[0]; | |
1458 | obj = cb->args[1]; | |
1459 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); | |
1460 | if (!flow) | |
1461 | break; | |
1462 | ||
1463 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, | |
1464 | NETLINK_CB(cb->skb).portid, | |
1465 | cb->nlh->nlmsg_seq, NLM_F_MULTI, | |
1466 | OVS_FLOW_CMD_GET, ufid_flags) < 0) | |
1467 | break; | |
1468 | ||
1469 | cb->args[0] = bucket; | |
1470 | cb->args[1] = obj; | |
1471 | } | |
1472 | rcu_read_unlock(); | |
1473 | return skb->len; | |
1474 | } | |
1475 | ||
1476 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { | |
1477 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
1478 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, | |
1479 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1480 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
1481 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, | |
1482 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, | |
1483 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
1484 | }; | |
1485 | ||
1486 | static const struct genl_ops dp_flow_genl_ops[] = { | |
1487 | { .cmd = OVS_FLOW_CMD_NEW, | |
1488 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
1489 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1490 | #endif | |
1491 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1492 | #ifdef HAVE_GENL_OPS_POLICY | |
1493 | .policy = flow_policy, | |
1494 | #endif | |
1495 | .doit = ovs_flow_cmd_new | |
1496 | }, | |
1497 | { .cmd = OVS_FLOW_CMD_DEL, | |
1498 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
1499 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1500 | #endif | |
1501 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1502 | #ifdef HAVE_GENL_OPS_POLICY | |
1503 | .policy = flow_policy, | |
1504 | #endif | |
1505 | .doit = ovs_flow_cmd_del | |
1506 | }, | |
1507 | { .cmd = OVS_FLOW_CMD_GET, | |
1508 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
1509 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1510 | #endif | |
1511 | .flags = 0, /* OK for unprivileged users. */ | |
1512 | #ifdef HAVE_GENL_OPS_POLICY | |
1513 | .policy = flow_policy, | |
1514 | #endif | |
1515 | .doit = ovs_flow_cmd_get, | |
1516 | .dumpit = ovs_flow_cmd_dump | |
1517 | }, | |
1518 | { .cmd = OVS_FLOW_CMD_SET, | |
1519 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
1520 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1521 | #endif | |
1522 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1523 | #ifdef HAVE_GENL_OPS_POLICY | |
1524 | .policy = flow_policy, | |
1525 | #endif | |
1526 | .doit = ovs_flow_cmd_set, | |
1527 | }, | |
1528 | }; | |
1529 | ||
1530 | static struct genl_family dp_flow_genl_family __ro_after_init = { | |
1531 | .hdrsize = sizeof(struct ovs_header), | |
1532 | .name = OVS_FLOW_FAMILY, | |
1533 | .version = OVS_FLOW_VERSION, | |
1534 | .maxattr = OVS_FLOW_ATTR_MAX, | |
1535 | #ifndef HAVE_GENL_OPS_POLICY | |
1536 | .policy = flow_policy, | |
1537 | #endif | |
1538 | .netnsok = true, | |
1539 | .parallel_ops = true, | |
1540 | .ops = dp_flow_genl_ops, | |
1541 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1542 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1543 | .n_mcgrps = 1, | |
1544 | .module = THIS_MODULE, | |
1545 | }; | |
1546 | ||
1547 | static size_t ovs_dp_cmd_msg_size(void) | |
1548 | { | |
1549 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1550 | ||
1551 | msgsize += nla_total_size(IFNAMSIZ); | |
1552 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); | |
1553 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
1554 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ | |
1555 | ||
1556 | return msgsize; | |
1557 | } | |
1558 | ||
1559 | /* Called with ovs_mutex. */ | |
1560 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, | |
1561 | u32 portid, u32 seq, u32 flags, u8 cmd) | |
1562 | { | |
1563 | struct ovs_header *ovs_header; | |
1564 | struct ovs_dp_stats dp_stats; | |
1565 | struct ovs_dp_megaflow_stats dp_megaflow_stats; | |
1566 | int err; | |
1567 | ||
1568 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, | |
1569 | flags, cmd); | |
1570 | if (!ovs_header) | |
1571 | goto error; | |
1572 | ||
1573 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1574 | ||
1575 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); | |
1576 | if (err) | |
1577 | goto nla_put_failure; | |
1578 | ||
1579 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); | |
1580 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1581 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1582 | goto nla_put_failure; | |
1583 | ||
1584 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1585 | sizeof(struct ovs_dp_megaflow_stats), | |
1586 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
1587 | goto nla_put_failure; | |
1588 | ||
1589 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) | |
1590 | goto nla_put_failure; | |
1591 | ||
1592 | genlmsg_end(skb, ovs_header); | |
1593 | return 0; | |
1594 | ||
1595 | nla_put_failure: | |
1596 | genlmsg_cancel(skb, ovs_header); | |
1597 | error: | |
1598 | return -EMSGSIZE; | |
1599 | } | |
1600 | ||
1601 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) | |
1602 | { | |
1603 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); | |
1604 | } | |
1605 | ||
1606 | /* Called with rcu_read_lock or ovs_mutex. */ | |
1607 | static struct datapath *lookup_datapath(struct net *net, | |
1608 | const struct ovs_header *ovs_header, | |
1609 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) | |
1610 | { | |
1611 | struct datapath *dp; | |
1612 | ||
1613 | if (!a[OVS_DP_ATTR_NAME]) | |
1614 | dp = get_dp(net, ovs_header->dp_ifindex); | |
1615 | else { | |
1616 | struct vport *vport; | |
1617 | ||
1618 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); | |
1619 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; | |
1620 | } | |
1621 | return dp ? dp : ERR_PTR(-ENODEV); | |
1622 | } | |
1623 | ||
1624 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) | |
1625 | { | |
1626 | struct datapath *dp; | |
1627 | ||
1628 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
1629 | if (IS_ERR(dp)) | |
1630 | return; | |
1631 | ||
1632 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1633 | dp->user_features = 0; | |
1634 | } | |
1635 | ||
1636 | DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support); | |
1637 | ||
1638 | static int ovs_dp_change(struct datapath *dp, struct nlattr *a[]) | |
1639 | { | |
1640 | u32 user_features = 0; | |
1641 | ||
1642 | if (a[OVS_DP_ATTR_USER_FEATURES]) { | |
1643 | user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1644 | ||
1645 | if (user_features & ~(OVS_DP_F_VPORT_PIDS | | |
1646 | OVS_DP_F_UNALIGNED | | |
1647 | OVS_DP_F_TC_RECIRC_SHARING)) | |
1648 | return -EOPNOTSUPP; | |
1649 | ||
1650 | #if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT) | |
1651 | if (user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1652 | return -EOPNOTSUPP; | |
1653 | #endif | |
1654 | } | |
1655 | ||
1656 | dp->user_features = user_features; | |
1657 | ||
1658 | if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1659 | static_branch_enable(&tc_recirc_sharing_support); | |
1660 | else | |
1661 | static_branch_disable(&tc_recirc_sharing_support); | |
1662 | ||
1663 | return 0; | |
1664 | } | |
1665 | ||
1666 | static int ovs_dp_stats_init(struct datapath *dp) | |
1667 | { | |
1668 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); | |
1669 | if (!dp->stats_percpu) | |
1670 | return -ENOMEM; | |
1671 | ||
1672 | return 0; | |
1673 | } | |
1674 | ||
1675 | static int ovs_dp_vport_init(struct datapath *dp) | |
1676 | { | |
1677 | int i; | |
1678 | ||
1679 | dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, | |
1680 | sizeof(struct hlist_head), | |
1681 | GFP_KERNEL); | |
1682 | if (!dp->ports) | |
1683 | return -ENOMEM; | |
1684 | ||
1685 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1686 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1687 | ||
1688 | return 0; | |
1689 | } | |
1690 | ||
1691 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
1692 | { | |
1693 | struct nlattr **a = info->attrs; | |
1694 | struct vport_parms parms; | |
1695 | struct sk_buff *reply; | |
1696 | struct datapath *dp; | |
1697 | struct vport *vport; | |
1698 | struct ovs_net *ovs_net; | |
1699 | int err; | |
1700 | ||
1701 | err = -EINVAL; | |
1702 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1703 | goto err; | |
1704 | ||
1705 | reply = ovs_dp_cmd_alloc_info(); | |
1706 | if (!reply) | |
1707 | return -ENOMEM; | |
1708 | ||
1709 | err = -ENOMEM; | |
1710 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1711 | if (dp == NULL) | |
1712 | goto err_destroy_reply; | |
1713 | ||
1714 | ovs_dp_set_net(dp, sock_net(skb->sk)); | |
1715 | ||
1716 | /* Allocate table. */ | |
1717 | err = ovs_flow_tbl_init(&dp->table); | |
1718 | if (err) | |
1719 | goto err_destroy_dp; | |
1720 | ||
1721 | err = ovs_dp_stats_init(dp); | |
1722 | if (err) | |
1723 | goto err_destroy_table; | |
1724 | ||
1725 | err = ovs_dp_vport_init(dp); | |
1726 | if (err) | |
1727 | goto err_destroy_stats; | |
1728 | ||
1729 | err = ovs_meters_init(dp); | |
1730 | if (err) | |
1731 | goto err_destroy_ports; | |
1732 | ||
1733 | /* Set up our datapath device. */ | |
1734 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1735 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1736 | parms.options = NULL; | |
1737 | parms.dp = dp; | |
1738 | parms.port_no = OVSP_LOCAL; | |
1739 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; | |
1740 | ||
1741 | err = ovs_dp_change(dp, a); | |
1742 | if (err) | |
1743 | goto err_destroy_meters; | |
1744 | ||
1745 | /* So far only local changes have been made, now need the lock. */ | |
1746 | ovs_lock(); | |
1747 | ||
1748 | vport = new_vport(&parms); | |
1749 | if (IS_ERR(vport)) { | |
1750 | err = PTR_ERR(vport); | |
1751 | if (err == -EBUSY) | |
1752 | err = -EEXIST; | |
1753 | ||
1754 | if (err == -EEXIST) { | |
1755 | /* An outdated user space instance that does not understand | |
1756 | * the concept of user_features has attempted to create a new | |
1757 | * datapath and is likely to reuse it. Drop all user features. | |
1758 | */ | |
1759 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1760 | ovs_dp_reset_user_features(skb, info); | |
1761 | } | |
1762 | ||
1763 | ovs_unlock(); | |
1764 | goto err_destroy_meters; | |
1765 | } | |
1766 | ||
1767 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, | |
1768 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1769 | BUG_ON(err < 0); | |
1770 | ||
1771 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); | |
1772 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); | |
1773 | ||
1774 | ovs_unlock(); | |
1775 | ||
1776 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); | |
1777 | return 0; | |
1778 | ||
1779 | err_destroy_meters: | |
1780 | ovs_meters_exit(dp); | |
1781 | err_destroy_ports: | |
1782 | kfree(dp->ports); | |
1783 | err_destroy_stats: | |
1784 | free_percpu(dp->stats_percpu); | |
1785 | err_destroy_table: | |
1786 | ovs_flow_tbl_destroy(&dp->table); | |
1787 | err_destroy_dp: | |
1788 | kfree(dp); | |
1789 | err_destroy_reply: | |
1790 | kfree_skb(reply); | |
1791 | err: | |
1792 | return err; | |
1793 | } | |
1794 | ||
1795 | /* Called with ovs_mutex. */ | |
1796 | static void __dp_destroy(struct datapath *dp) | |
1797 | { | |
1798 | int i; | |
1799 | ||
1800 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1801 | struct vport *vport; | |
1802 | struct hlist_node *n; | |
1803 | ||
1804 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) | |
1805 | if (vport->port_no != OVSP_LOCAL) | |
1806 | ovs_dp_detach_port(vport); | |
1807 | } | |
1808 | ||
1809 | list_del_rcu(&dp->list_node); | |
1810 | ||
1811 | /* OVSP_LOCAL is datapath internal port. We need to make sure that | |
1812 | * all ports in datapath are destroyed first before freeing datapath. | |
1813 | */ | |
1814 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); | |
1815 | ||
1816 | /* RCU destroy the flow table */ | |
1817 | call_rcu(&dp->rcu, destroy_dp_rcu); | |
1818 | } | |
1819 | ||
1820 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1821 | { | |
1822 | struct sk_buff *reply; | |
1823 | struct datapath *dp; | |
1824 | int err; | |
1825 | ||
1826 | reply = ovs_dp_cmd_alloc_info(); | |
1827 | if (!reply) | |
1828 | return -ENOMEM; | |
1829 | ||
1830 | ovs_lock(); | |
1831 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
1832 | err = PTR_ERR(dp); | |
1833 | if (IS_ERR(dp)) | |
1834 | goto err_unlock_free; | |
1835 | ||
1836 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, | |
1837 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1838 | BUG_ON(err < 0); | |
1839 | ||
1840 | __dp_destroy(dp); | |
1841 | ovs_unlock(); | |
1842 | ||
1843 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); | |
1844 | return 0; | |
1845 | ||
1846 | err_unlock_free: | |
1847 | ovs_unlock(); | |
1848 | kfree_skb(reply); | |
1849 | return err; | |
1850 | } | |
1851 | ||
1852 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1853 | { | |
1854 | struct sk_buff *reply; | |
1855 | struct datapath *dp; | |
1856 | int err; | |
1857 | ||
1858 | reply = ovs_dp_cmd_alloc_info(); | |
1859 | if (!reply) | |
1860 | return -ENOMEM; | |
1861 | ||
1862 | ovs_lock(); | |
1863 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
1864 | err = PTR_ERR(dp); | |
1865 | if (IS_ERR(dp)) | |
1866 | goto err_unlock_free; | |
1867 | ||
1868 | err = ovs_dp_change(dp, info->attrs); | |
1869 | if (err) | |
1870 | goto err_unlock_free; | |
1871 | ||
1872 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, | |
1873 | info->snd_seq, 0, OVS_DP_CMD_GET); | |
1874 | BUG_ON(err < 0); | |
1875 | ||
1876 | ovs_unlock(); | |
1877 | ||
1878 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); | |
1879 | return 0; | |
1880 | ||
1881 | err_unlock_free: | |
1882 | ovs_unlock(); | |
1883 | kfree_skb(reply); | |
1884 | return err; | |
1885 | } | |
1886 | ||
1887 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1888 | { | |
1889 | struct sk_buff *reply; | |
1890 | struct datapath *dp; | |
1891 | int err; | |
1892 | ||
1893 | reply = ovs_dp_cmd_alloc_info(); | |
1894 | if (!reply) | |
1895 | return -ENOMEM; | |
1896 | ||
1897 | ovs_lock(); | |
1898 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
1899 | if (IS_ERR(dp)) { | |
1900 | err = PTR_ERR(dp); | |
1901 | goto err_unlock_free; | |
1902 | } | |
1903 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, | |
1904 | info->snd_seq, 0, OVS_DP_CMD_GET); | |
1905 | BUG_ON(err < 0); | |
1906 | ovs_unlock(); | |
1907 | ||
1908 | return genlmsg_reply(reply, info); | |
1909 | ||
1910 | err_unlock_free: | |
1911 | ovs_unlock(); | |
1912 | kfree_skb(reply); | |
1913 | return err; | |
1914 | } | |
1915 | ||
1916 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1917 | { | |
1918 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); | |
1919 | struct datapath *dp; | |
1920 | int skip = cb->args[0]; | |
1921 | int i = 0; | |
1922 | ||
1923 | ovs_lock(); | |
1924 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
1925 | if (i >= skip && | |
1926 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, | |
1927 | cb->nlh->nlmsg_seq, NLM_F_MULTI, | |
1928 | OVS_DP_CMD_GET) < 0) | |
1929 | break; | |
1930 | i++; | |
1931 | } | |
1932 | ovs_unlock(); | |
1933 | ||
1934 | cb->args[0] = i; | |
1935 | ||
1936 | return skb->len; | |
1937 | } | |
1938 | ||
1939 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { | |
1940 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1941 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1942 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1943 | }; | |
1944 | ||
1945 | static const struct genl_ops dp_datapath_genl_ops[] = { | |
1946 | { .cmd = OVS_DP_CMD_NEW, | |
1947 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
1948 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1949 | #endif | |
1950 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1951 | #ifdef HAVE_GENL_OPS_POLICY | |
1952 | .policy = datapath_policy, | |
1953 | #endif | |
1954 | .doit = ovs_dp_cmd_new | |
1955 | }, | |
1956 | { .cmd = OVS_DP_CMD_DEL, | |
1957 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
1958 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1959 | #endif | |
1960 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1961 | #ifdef HAVE_GENL_OPS_POLICY | |
1962 | .policy = datapath_policy, | |
1963 | #endif | |
1964 | .doit = ovs_dp_cmd_del | |
1965 | }, | |
1966 | { .cmd = OVS_DP_CMD_GET, | |
1967 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
1968 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1969 | #endif | |
1970 | .flags = 0, /* OK for unprivileged users. */ | |
1971 | #ifdef HAVE_GENL_OPS_POLICY | |
1972 | .policy = datapath_policy, | |
1973 | #endif | |
1974 | .doit = ovs_dp_cmd_get, | |
1975 | .dumpit = ovs_dp_cmd_dump | |
1976 | }, | |
1977 | { .cmd = OVS_DP_CMD_SET, | |
1978 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
1979 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1980 | #endif | |
1981 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1982 | #ifdef HAVE_GENL_OPS_POLICY | |
1983 | .policy = datapath_policy, | |
1984 | #endif | |
1985 | .doit = ovs_dp_cmd_set, | |
1986 | }, | |
1987 | }; | |
1988 | ||
1989 | static struct genl_family dp_datapath_genl_family __ro_after_init = { | |
1990 | .hdrsize = sizeof(struct ovs_header), | |
1991 | .name = OVS_DATAPATH_FAMILY, | |
1992 | .version = OVS_DATAPATH_VERSION, | |
1993 | .maxattr = OVS_DP_ATTR_MAX, | |
1994 | #ifndef HAVE_GENL_OPS_POLICY | |
1995 | .policy = datapath_policy, | |
1996 | #endif | |
1997 | .netnsok = true, | |
1998 | .parallel_ops = true, | |
1999 | .ops = dp_datapath_genl_ops, | |
2000 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
2001 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
2002 | .n_mcgrps = 1, | |
2003 | .module = THIS_MODULE, | |
2004 | }; | |
2005 | ||
2006 | /* Called with ovs_mutex or RCU read lock. */ | |
2007 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, | |
2008 | struct net *net, u32 portid, u32 seq, | |
2009 | u32 flags, u8 cmd, gfp_t gfp) | |
2010 | { | |
2011 | struct ovs_header *ovs_header; | |
2012 | struct ovs_vport_stats vport_stats; | |
2013 | int err; | |
2014 | ||
2015 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, | |
2016 | flags, cmd); | |
2017 | if (!ovs_header) | |
2018 | return -EMSGSIZE; | |
2019 | ||
2020 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
2021 | ||
2022 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || | |
2023 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
2024 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, | |
2025 | ovs_vport_name(vport)) || | |
2026 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
2027 | goto nla_put_failure; | |
2028 | ||
2029 | #ifdef HAVE_PEERNET2ID_ALLOC | |
2030 | if (!net_eq(net, dev_net(vport->dev))) { | |
2031 | int id = peernet2id_alloc(net, dev_net(vport->dev), gfp); | |
2032 | ||
2033 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
2034 | goto nla_put_failure; | |
2035 | } | |
2036 | ||
2037 | #endif | |
2038 | ovs_vport_get_stats(vport, &vport_stats); | |
2039 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, | |
2040 | sizeof(struct ovs_vport_stats), &vport_stats, | |
2041 | OVS_VPORT_ATTR_PAD)) | |
2042 | goto nla_put_failure; | |
2043 | ||
2044 | if (ovs_vport_get_upcall_portids(vport, skb)) | |
2045 | goto nla_put_failure; | |
2046 | ||
2047 | err = ovs_vport_get_options(vport, skb); | |
2048 | if (err == -EMSGSIZE) | |
2049 | goto error; | |
2050 | ||
2051 | genlmsg_end(skb, ovs_header); | |
2052 | return 0; | |
2053 | ||
2054 | nla_put_failure: | |
2055 | err = -EMSGSIZE; | |
2056 | error: | |
2057 | genlmsg_cancel(skb, ovs_header); | |
2058 | return err; | |
2059 | } | |
2060 | ||
2061 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) | |
2062 | { | |
2063 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
2064 | } | |
2065 | ||
2066 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
2067 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, | |
2068 | u32 portid, u32 seq, u8 cmd) | |
2069 | { | |
2070 | struct sk_buff *skb; | |
2071 | int retval; | |
2072 | ||
2073 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
2074 | if (!skb) | |
2075 | return ERR_PTR(-ENOMEM); | |
2076 | ||
2077 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd, | |
2078 | GFP_KERNEL); | |
2079 | BUG_ON(retval < 0); | |
2080 | ||
2081 | return skb; | |
2082 | } | |
2083 | ||
2084 | /* Called with ovs_mutex or RCU read lock. */ | |
2085 | static struct vport *lookup_vport(struct net *net, | |
2086 | const struct ovs_header *ovs_header, | |
2087 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) | |
2088 | { | |
2089 | struct datapath *dp; | |
2090 | struct vport *vport; | |
2091 | ||
2092 | if (a[OVS_VPORT_ATTR_IFINDEX]) | |
2093 | return ERR_PTR(-EOPNOTSUPP); | |
2094 | if (a[OVS_VPORT_ATTR_NAME]) { | |
2095 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); | |
2096 | if (!vport) | |
2097 | return ERR_PTR(-ENODEV); | |
2098 | if (ovs_header->dp_ifindex && | |
2099 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
2100 | return ERR_PTR(-ENODEV); | |
2101 | return vport; | |
2102 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
2103 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
2104 | ||
2105 | if (port_no >= DP_MAX_PORTS) | |
2106 | return ERR_PTR(-EFBIG); | |
2107 | ||
2108 | dp = get_dp(net, ovs_header->dp_ifindex); | |
2109 | if (!dp) | |
2110 | return ERR_PTR(-ENODEV); | |
2111 | ||
2112 | vport = ovs_vport_ovsl_rcu(dp, port_no); | |
2113 | if (!vport) | |
2114 | return ERR_PTR(-ENODEV); | |
2115 | return vport; | |
2116 | } else | |
2117 | return ERR_PTR(-EINVAL); | |
2118 | ||
2119 | } | |
2120 | ||
2121 | static unsigned int ovs_get_max_headroom(struct datapath *dp) | |
2122 | { | |
2123 | unsigned int dev_headroom, max_headroom = 0; | |
2124 | struct net_device *dev; | |
2125 | struct vport *vport; | |
2126 | int i; | |
2127 | ||
2128 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2129 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
2130 | dev = vport->dev; | |
2131 | dev_headroom = netdev_get_fwd_headroom(dev); | |
2132 | if (dev_headroom > max_headroom) | |
2133 | max_headroom = dev_headroom; | |
2134 | } | |
2135 | } | |
2136 | ||
2137 | return max_headroom; | |
2138 | } | |
2139 | ||
2140 | /* Called with ovs_mutex */ | |
2141 | static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom) | |
2142 | { | |
2143 | struct vport *vport; | |
2144 | int i; | |
2145 | ||
2146 | dp->max_headroom = new_headroom; | |
2147 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
2148 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) | |
2149 | netdev_set_rx_headroom(vport->dev, new_headroom); | |
2150 | } | |
2151 | ||
2152 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
2153 | { | |
2154 | struct nlattr **a = info->attrs; | |
2155 | struct ovs_header *ovs_header = info->userhdr; | |
2156 | struct vport_parms parms; | |
2157 | struct sk_buff *reply; | |
2158 | struct vport *vport; | |
2159 | struct datapath *dp; | |
2160 | unsigned int new_headroom; | |
2161 | u32 port_no; | |
2162 | int err; | |
2163 | ||
2164 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || | |
2165 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
2166 | return -EINVAL; | |
2167 | if (a[OVS_VPORT_ATTR_IFINDEX]) | |
2168 | return -EOPNOTSUPP; | |
2169 | ||
2170 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2171 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2172 | if (port_no >= DP_MAX_PORTS) | |
2173 | return -EFBIG; | |
2174 | ||
2175 | reply = ovs_vport_cmd_alloc_info(); | |
2176 | if (!reply) | |
2177 | return -ENOMEM; | |
2178 | ||
2179 | ovs_lock(); | |
2180 | restart: | |
2181 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
2182 | err = -ENODEV; | |
2183 | if (!dp) | |
2184 | goto exit_unlock_free; | |
2185 | ||
2186 | if (port_no) { | |
2187 | vport = ovs_vport_ovsl(dp, port_no); | |
2188 | err = -EBUSY; | |
2189 | if (vport) | |
2190 | goto exit_unlock_free; | |
2191 | } else { | |
2192 | for (port_no = 1; ; port_no++) { | |
2193 | if (port_no >= DP_MAX_PORTS) { | |
2194 | err = -EFBIG; | |
2195 | goto exit_unlock_free; | |
2196 | } | |
2197 | vport = ovs_vport_ovsl(dp, port_no); | |
2198 | if (!vport) | |
2199 | break; | |
2200 | } | |
2201 | } | |
2202 | ||
2203 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2204 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2205 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2206 | parms.dp = dp; | |
2207 | parms.port_no = port_no; | |
2208 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2209 | ||
2210 | vport = new_vport(&parms); | |
2211 | err = PTR_ERR(vport); | |
2212 | if (IS_ERR(vport)) { | |
2213 | if (err == -EAGAIN) | |
2214 | goto restart; | |
2215 | goto exit_unlock_free; | |
2216 | } | |
2217 | ||
2218 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), | |
2219 | info->snd_portid, info->snd_seq, 0, | |
2220 | OVS_VPORT_CMD_NEW, GFP_KERNEL); | |
2221 | BUG_ON(err < 0); | |
2222 | ||
2223 | new_headroom = netdev_get_fwd_headroom(vport->dev); | |
2224 | ||
2225 | if (new_headroom > dp->max_headroom) | |
2226 | ovs_update_headroom(dp, new_headroom); | |
2227 | else | |
2228 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2229 | ||
2230 | ovs_unlock(); | |
2231 | ||
2232 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); | |
2233 | return 0; | |
2234 | ||
2235 | exit_unlock_free: | |
2236 | ovs_unlock(); | |
2237 | kfree_skb(reply); | |
2238 | return err; | |
2239 | } | |
2240 | ||
2241 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2242 | { | |
2243 | struct nlattr **a = info->attrs; | |
2244 | struct sk_buff *reply; | |
2245 | struct vport *vport; | |
2246 | int err; | |
2247 | ||
2248 | reply = ovs_vport_cmd_alloc_info(); | |
2249 | if (!reply) | |
2250 | return -ENOMEM; | |
2251 | ||
2252 | ovs_lock(); | |
2253 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); | |
2254 | err = PTR_ERR(vport); | |
2255 | if (IS_ERR(vport)) | |
2256 | goto exit_unlock_free; | |
2257 | ||
2258 | if (a[OVS_VPORT_ATTR_TYPE] && | |
2259 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { | |
2260 | err = -EINVAL; | |
2261 | goto exit_unlock_free; | |
2262 | } | |
2263 | ||
2264 | if (a[OVS_VPORT_ATTR_OPTIONS]) { | |
2265 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); | |
2266 | if (err) | |
2267 | goto exit_unlock_free; | |
2268 | } | |
2269 | ||
2270 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2271 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2272 | ||
2273 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2274 | if (err) | |
2275 | goto exit_unlock_free; | |
2276 | } | |
2277 | ||
2278 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), | |
2279 | info->snd_portid, info->snd_seq, 0, | |
2280 | OVS_VPORT_CMD_SET, GFP_KERNEL); | |
2281 | BUG_ON(err < 0); | |
2282 | ovs_unlock(); | |
2283 | ||
2284 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); | |
2285 | return 0; | |
2286 | ||
2287 | exit_unlock_free: | |
2288 | ovs_unlock(); | |
2289 | kfree_skb(reply); | |
2290 | return err; | |
2291 | } | |
2292 | ||
2293 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2294 | { | |
2295 | bool update_headroom = false; | |
2296 | struct nlattr **a = info->attrs; | |
2297 | struct sk_buff *reply; | |
2298 | struct datapath *dp; | |
2299 | struct vport *vport; | |
2300 | unsigned int new_headroom; | |
2301 | int err; | |
2302 | ||
2303 | reply = ovs_vport_cmd_alloc_info(); | |
2304 | if (!reply) | |
2305 | return -ENOMEM; | |
2306 | ||
2307 | ovs_lock(); | |
2308 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); | |
2309 | err = PTR_ERR(vport); | |
2310 | if (IS_ERR(vport)) | |
2311 | goto exit_unlock_free; | |
2312 | ||
2313 | if (vport->port_no == OVSP_LOCAL) { | |
2314 | err = -EINVAL; | |
2315 | goto exit_unlock_free; | |
2316 | } | |
2317 | ||
2318 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), | |
2319 | info->snd_portid, info->snd_seq, 0, | |
2320 | OVS_VPORT_CMD_DEL, GFP_KERNEL); | |
2321 | BUG_ON(err < 0); | |
2322 | ||
2323 | /* the vport deletion may trigger dp headroom update */ | |
2324 | dp = vport->dp; | |
2325 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
2326 | update_headroom = true; | |
2327 | ||
2328 | netdev_reset_rx_headroom(vport->dev); | |
2329 | ovs_dp_detach_port(vport); | |
2330 | ||
2331 | if (update_headroom) { | |
2332 | new_headroom = ovs_get_max_headroom(dp); | |
2333 | ||
2334 | if (new_headroom < dp->max_headroom) | |
2335 | ovs_update_headroom(dp, new_headroom); | |
2336 | } | |
2337 | ovs_unlock(); | |
2338 | ||
2339 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); | |
2340 | return 0; | |
2341 | ||
2342 | exit_unlock_free: | |
2343 | ovs_unlock(); | |
2344 | kfree_skb(reply); | |
2345 | return err; | |
2346 | } | |
2347 | ||
2348 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2349 | { | |
2350 | struct nlattr **a = info->attrs; | |
2351 | struct ovs_header *ovs_header = info->userhdr; | |
2352 | struct sk_buff *reply; | |
2353 | struct vport *vport; | |
2354 | int err; | |
2355 | ||
2356 | reply = ovs_vport_cmd_alloc_info(); | |
2357 | if (!reply) | |
2358 | return -ENOMEM; | |
2359 | ||
2360 | rcu_read_lock(); | |
2361 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); | |
2362 | err = PTR_ERR(vport); | |
2363 | if (IS_ERR(vport)) | |
2364 | goto exit_unlock_free; | |
2365 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), | |
2366 | info->snd_portid, info->snd_seq, 0, | |
2367 | OVS_VPORT_CMD_GET, GFP_ATOMIC); | |
2368 | BUG_ON(err < 0); | |
2369 | rcu_read_unlock(); | |
2370 | ||
2371 | return genlmsg_reply(reply, info); | |
2372 | ||
2373 | exit_unlock_free: | |
2374 | rcu_read_unlock(); | |
2375 | kfree_skb(reply); | |
2376 | return err; | |
2377 | } | |
2378 | ||
2379 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2380 | { | |
2381 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2382 | struct datapath *dp; | |
2383 | int bucket = cb->args[0], skip = cb->args[1]; | |
2384 | int i, j = 0; | |
2385 | ||
2386 | rcu_read_lock(); | |
2387 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); | |
2388 | if (!dp) { | |
2389 | rcu_read_unlock(); | |
2390 | return -ENODEV; | |
2391 | } | |
2392 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2393 | struct vport *vport; | |
2394 | ||
2395 | j = 0; | |
2396 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
2397 | if (j >= skip && | |
2398 | ovs_vport_cmd_fill_info(vport, skb, | |
2399 | sock_net(skb->sk), | |
2400 | NETLINK_CB(cb->skb).portid, | |
2401 | cb->nlh->nlmsg_seq, | |
2402 | NLM_F_MULTI, | |
2403 | OVS_VPORT_CMD_GET, | |
2404 | GFP_ATOMIC) < 0) | |
2405 | goto out; | |
2406 | ||
2407 | j++; | |
2408 | } | |
2409 | skip = 0; | |
2410 | } | |
2411 | out: | |
2412 | rcu_read_unlock(); | |
2413 | ||
2414 | cb->args[0] = i; | |
2415 | cb->args[1] = j; | |
2416 | ||
2417 | return skb->len; | |
2418 | } | |
2419 | ||
2420 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { | |
2421 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2422 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2423 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2424 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2425 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_UNSPEC }, | |
2426 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2427 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, | |
2428 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
2429 | }; | |
2430 | ||
2431 | static const struct genl_ops dp_vport_genl_ops[] = { | |
2432 | { .cmd = OVS_VPORT_CMD_NEW, | |
2433 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
2434 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
2435 | #endif | |
2436 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2437 | #ifdef HAVE_GENL_OPS_POLICY | |
2438 | .policy = vport_policy, | |
2439 | #endif | |
2440 | .doit = ovs_vport_cmd_new | |
2441 | }, | |
2442 | { .cmd = OVS_VPORT_CMD_DEL, | |
2443 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
2444 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
2445 | #endif | |
2446 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2447 | #ifdef HAVE_GENL_OPS_POLICY | |
2448 | .policy = vport_policy, | |
2449 | #endif | |
2450 | .doit = ovs_vport_cmd_del | |
2451 | }, | |
2452 | { .cmd = OVS_VPORT_CMD_GET, | |
2453 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
2454 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
2455 | #endif | |
2456 | .flags = 0, /* OK for unprivileged users. */ | |
2457 | #ifdef HAVE_GENL_OPS_POLICY | |
2458 | .policy = vport_policy, | |
2459 | #endif | |
2460 | .doit = ovs_vport_cmd_get, | |
2461 | .dumpit = ovs_vport_cmd_dump | |
2462 | }, | |
2463 | { .cmd = OVS_VPORT_CMD_SET, | |
2464 | #ifdef HAVE_GENL_VALIDATE_FLAGS | |
2465 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
2466 | #endif | |
2467 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2468 | #ifdef HAVE_GENL_OPS_POLICY | |
2469 | .policy = vport_policy, | |
2470 | #endif | |
2471 | .doit = ovs_vport_cmd_set, | |
2472 | }, | |
2473 | }; | |
2474 | ||
2475 | struct genl_family dp_vport_genl_family __ro_after_init = { | |
2476 | .hdrsize = sizeof(struct ovs_header), | |
2477 | .name = OVS_VPORT_FAMILY, | |
2478 | .version = OVS_VPORT_VERSION, | |
2479 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2480 | #ifndef HAVE_GENL_OPS_POLICY | |
2481 | .policy = vport_policy, | |
2482 | #endif | |
2483 | .netnsok = true, | |
2484 | .parallel_ops = true, | |
2485 | .ops = dp_vport_genl_ops, | |
2486 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2487 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2488 | .n_mcgrps = 1, | |
2489 | .module = THIS_MODULE, | |
2490 | }; | |
2491 | ||
2492 | static struct genl_family *dp_genl_families[] = { | |
2493 | &dp_datapath_genl_family, | |
2494 | &dp_vport_genl_family, | |
2495 | &dp_flow_genl_family, | |
2496 | &dp_packet_genl_family, | |
2497 | &dp_meter_genl_family, | |
2498 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) | |
2499 | &dp_ct_limit_genl_family, | |
2500 | #endif | |
2501 | }; | |
2502 | ||
2503 | static void dp_unregister_genl(int n_families) | |
2504 | { | |
2505 | int i; | |
2506 | ||
2507 | for (i = 0; i < n_families; i++) | |
2508 | genl_unregister_family(dp_genl_families[i]); | |
2509 | } | |
2510 | ||
2511 | static int __init dp_register_genl(void) | |
2512 | { | |
2513 | int err; | |
2514 | int i; | |
2515 | ||
2516 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2517 | ||
2518 | err = genl_register_family(dp_genl_families[i]); | |
2519 | if (err) | |
2520 | goto error; | |
2521 | } | |
2522 | ||
2523 | return 0; | |
2524 | ||
2525 | error: | |
2526 | dp_unregister_genl(i); | |
2527 | return err; | |
2528 | } | |
2529 | ||
2530 | static int __net_init ovs_init_net(struct net *net) | |
2531 | { | |
2532 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2533 | ||
2534 | INIT_LIST_HEAD(&ovs_net->dps); | |
2535 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); | |
2536 | ovs_netns_frags_init(net); | |
2537 | ovs_netns_frags6_init(net); | |
2538 | return ovs_ct_init(net); | |
2539 | } | |
2540 | ||
2541 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, | |
2542 | struct list_head *head) | |
2543 | { | |
2544 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2545 | struct datapath *dp; | |
2546 | ||
2547 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2548 | int i; | |
2549 | ||
2550 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2551 | struct vport *vport; | |
2552 | ||
2553 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
2554 | ||
2555 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) | |
2556 | continue; | |
2557 | ||
2558 | if (dev_net(vport->dev) == dnet) | |
2559 | list_add(&vport->detach_list, head); | |
2560 | } | |
2561 | } | |
2562 | } | |
2563 | } | |
2564 | ||
2565 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2566 | { | |
2567 | struct datapath *dp, *dp_next; | |
2568 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2569 | struct vport *vport, *vport_next; | |
2570 | struct net *net; | |
2571 | LIST_HEAD(head); | |
2572 | ||
2573 | ovs_netns_frags6_exit(dnet); | |
2574 | ovs_netns_frags_exit(dnet); | |
2575 | ovs_lock(); | |
2576 | ||
2577 | ovs_ct_exit(dnet); | |
2578 | ||
2579 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2580 | __dp_destroy(dp); | |
2581 | ||
2582 | #ifdef HAVE_NET_RWSEM | |
2583 | down_read(&net_rwsem); | |
2584 | #else | |
2585 | rtnl_lock(); | |
2586 | #endif | |
2587 | for_each_net(net) | |
2588 | list_vports_from_net(net, dnet, &head); | |
2589 | #ifdef HAVE_NET_RWSEM | |
2590 | up_read(&net_rwsem); | |
2591 | #else | |
2592 | rtnl_unlock(); | |
2593 | #endif | |
2594 | ||
2595 | /* Detach all vports from given namespace. */ | |
2596 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2597 | list_del(&vport->detach_list); | |
2598 | ovs_dp_detach_port(vport); | |
2599 | } | |
2600 | ||
2601 | ovs_unlock(); | |
2602 | ||
2603 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2604 | } | |
2605 | ||
2606 | static struct pernet_operations ovs_net_ops = { | |
2607 | .init = ovs_init_net, | |
2608 | .exit = ovs_exit_net, | |
2609 | .id = &ovs_net_id, | |
2610 | .size = sizeof(struct ovs_net), | |
2611 | }; | |
2612 | ||
2613 | static int __init dp_init(void) | |
2614 | { | |
2615 | int err; | |
2616 | ||
2617 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof_field(struct sk_buff, cb)); | |
2618 | ||
2619 | pr_info("Open vSwitch switching datapath %s\n", VERSION); | |
2620 | ||
2621 | ovs_nsh_init(); | |
2622 | err = action_fifos_init(); | |
2623 | if (err) | |
2624 | goto error; | |
2625 | ||
2626 | err = ovs_internal_dev_rtnl_link_register(); | |
2627 | if (err) | |
2628 | goto error_action_fifos_exit; | |
2629 | ||
2630 | err = ovs_flow_init(); | |
2631 | if (err) | |
2632 | goto error_unreg_rtnl_link; | |
2633 | ||
2634 | err = ovs_vport_init(); | |
2635 | if (err) | |
2636 | goto error_flow_exit; | |
2637 | ||
2638 | err = register_pernet_device(&ovs_net_ops); | |
2639 | if (err) | |
2640 | goto error_vport_exit; | |
2641 | ||
2642 | err = compat_init(); | |
2643 | if (err) | |
2644 | goto error_netns_exit; | |
2645 | ||
2646 | err = register_netdevice_notifier(&ovs_dp_device_notifier); | |
2647 | if (err) | |
2648 | goto error_compat_exit; | |
2649 | ||
2650 | err = ovs_netdev_init(); | |
2651 | if (err) | |
2652 | goto error_unreg_notifier; | |
2653 | ||
2654 | err = dp_register_genl(); | |
2655 | if (err < 0) | |
2656 | goto error_unreg_netdev; | |
2657 | ||
2658 | return 0; | |
2659 | ||
2660 | error_unreg_netdev: | |
2661 | ovs_netdev_exit(); | |
2662 | error_unreg_notifier: | |
2663 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
2664 | error_compat_exit: | |
2665 | compat_exit(); | |
2666 | error_netns_exit: | |
2667 | unregister_pernet_device(&ovs_net_ops); | |
2668 | error_vport_exit: | |
2669 | ovs_vport_exit(); | |
2670 | error_flow_exit: | |
2671 | ovs_flow_exit(); | |
2672 | error_unreg_rtnl_link: | |
2673 | ovs_internal_dev_rtnl_link_unregister(); | |
2674 | error_action_fifos_exit: | |
2675 | action_fifos_exit(); | |
2676 | error: | |
2677 | ovs_nsh_cleanup(); | |
2678 | return err; | |
2679 | } | |
2680 | ||
2681 | static void dp_cleanup(void) | |
2682 | { | |
2683 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); | |
2684 | ovs_netdev_exit(); | |
2685 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
2686 | compat_exit(); | |
2687 | unregister_pernet_device(&ovs_net_ops); | |
2688 | rcu_barrier(); | |
2689 | ovs_vport_exit(); | |
2690 | ovs_flow_exit(); | |
2691 | ovs_internal_dev_rtnl_link_unregister(); | |
2692 | action_fifos_exit(); | |
2693 | ovs_nsh_cleanup(); | |
2694 | } | |
2695 | ||
2696 | module_init(dp_init); | |
2697 | module_exit(dp_cleanup); | |
2698 | ||
2699 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2700 | MODULE_LICENSE("GPL"); | |
2701 | MODULE_VERSION(VERSION); | |
2702 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); | |
2703 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2704 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2705 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
2706 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); | |
2707 | MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); |