]>
Commit | Line | Data |
---|---|---|
ccb1352e | 1 | /* |
03f0d916 | 2 | * Copyright (c) 2007-2013 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" | |
e6445719 | 58 | #include "flow_netlink.h" |
ccb1352e | 59 | #include "vport-internal_dev.h" |
cff63a52 | 60 | #include "vport-netdev.h" |
ccb1352e | 61 | |
8e4e1713 PS |
62 | int ovs_net_id __read_mostly; |
63 | ||
68eb5503 | 64 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 65 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 66 | { |
68eb5503 | 67 | genl_notify(family, skb, genl_info_net(info), info->snd_portid, |
2a94fe48 | 68 | 0, info->nlhdr, GFP_KERNEL); |
ed661185 TG |
69 | } |
70 | ||
ccb1352e JG |
71 | /** |
72 | * DOC: Locking: | |
73 | * | |
8e4e1713 PS |
74 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
75 | * operations on vports, etc.), Writes to other state (flow table | |
76 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
77 | * by ovs_lock. | |
ccb1352e JG |
78 | * |
79 | * Reads are protected by RCU. | |
80 | * | |
81 | * There are a few special cases (mostly stats) that have their own | |
82 | * synchronization but they nest under all of above and don't interact with | |
83 | * each other. | |
8e4e1713 PS |
84 | * |
85 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
86 | */ |
87 | ||
8e4e1713 PS |
88 | static DEFINE_MUTEX(ovs_mutex); |
89 | ||
90 | void ovs_lock(void) | |
91 | { | |
92 | mutex_lock(&ovs_mutex); | |
93 | } | |
94 | ||
95 | void ovs_unlock(void) | |
96 | { | |
97 | mutex_unlock(&ovs_mutex); | |
98 | } | |
99 | ||
100 | #ifdef CONFIG_LOCKDEP | |
101 | int lockdep_ovsl_is_held(void) | |
102 | { | |
103 | if (debug_locks) | |
104 | return lockdep_is_held(&ovs_mutex); | |
105 | else | |
106 | return 1; | |
107 | } | |
108 | #endif | |
109 | ||
ccb1352e | 110 | static struct vport *new_vport(const struct vport_parms *); |
46df7b81 | 111 | static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *, |
ccb1352e | 112 | const struct dp_upcall_info *); |
46df7b81 PS |
113 | static int queue_userspace_packet(struct net *, int dp_ifindex, |
114 | struct sk_buff *, | |
ccb1352e JG |
115 | const struct dp_upcall_info *); |
116 | ||
8e4e1713 | 117 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 118 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
ccb1352e JG |
119 | { |
120 | struct datapath *dp = NULL; | |
121 | struct net_device *dev; | |
122 | ||
123 | rcu_read_lock(); | |
46df7b81 | 124 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
ccb1352e JG |
125 | if (dev) { |
126 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
127 | if (vport) | |
128 | dp = vport->dp; | |
129 | } | |
130 | rcu_read_unlock(); | |
131 | ||
132 | return dp; | |
133 | } | |
134 | ||
8e4e1713 | 135 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
ccb1352e JG |
136 | const char *ovs_dp_name(const struct datapath *dp) |
137 | { | |
8e4e1713 | 138 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
ccb1352e JG |
139 | return vport->ops->get_name(vport); |
140 | } | |
141 | ||
142 | static int get_dpifindex(struct datapath *dp) | |
143 | { | |
144 | struct vport *local; | |
145 | int ifindex; | |
146 | ||
147 | rcu_read_lock(); | |
148 | ||
15eac2a7 | 149 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 150 | if (local) |
cff63a52 | 151 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
ccb1352e JG |
152 | else |
153 | ifindex = 0; | |
154 | ||
155 | rcu_read_unlock(); | |
156 | ||
157 | return ifindex; | |
158 | } | |
159 | ||
160 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
161 | { | |
162 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
163 | ||
618ed0c8 | 164 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 165 | free_percpu(dp->stats_percpu); |
46df7b81 | 166 | release_net(ovs_dp_get_net(dp)); |
15eac2a7 | 167 | kfree(dp->ports); |
ccb1352e JG |
168 | kfree(dp); |
169 | } | |
170 | ||
15eac2a7 PS |
171 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
172 | u16 port_no) | |
173 | { | |
174 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
175 | } | |
176 | ||
177 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) | |
178 | { | |
179 | struct vport *vport; | |
15eac2a7 PS |
180 | struct hlist_head *head; |
181 | ||
182 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 183 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
184 | if (vport->port_no == port_no) |
185 | return vport; | |
186 | } | |
187 | return NULL; | |
188 | } | |
189 | ||
8e4e1713 | 190 | /* Called with ovs_mutex. */ |
ccb1352e JG |
191 | static struct vport *new_vport(const struct vport_parms *parms) |
192 | { | |
193 | struct vport *vport; | |
194 | ||
195 | vport = ovs_vport_add(parms); | |
196 | if (!IS_ERR(vport)) { | |
197 | struct datapath *dp = parms->dp; | |
15eac2a7 | 198 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 199 | |
15eac2a7 | 200 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 201 | } |
ccb1352e JG |
202 | return vport; |
203 | } | |
204 | ||
ccb1352e JG |
205 | void ovs_dp_detach_port(struct vport *p) |
206 | { | |
8e4e1713 | 207 | ASSERT_OVSL(); |
ccb1352e JG |
208 | |
209 | /* First drop references to device. */ | |
15eac2a7 | 210 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
211 | |
212 | /* Then destroy it. */ | |
213 | ovs_vport_del(p); | |
214 | } | |
215 | ||
216 | /* Must be called with rcu_read_lock. */ | |
217 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) | |
218 | { | |
219 | struct datapath *dp = p->dp; | |
220 | struct sw_flow *flow; | |
221 | struct dp_stats_percpu *stats; | |
222 | struct sw_flow_key key; | |
223 | u64 *stats_counter; | |
1bd7116f | 224 | u32 n_mask_hit; |
ccb1352e | 225 | int error; |
ccb1352e | 226 | |
404f2f10 | 227 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e JG |
228 | |
229 | /* Extract flow from 'skb' into 'key'. */ | |
03f0d916 | 230 | error = ovs_flow_extract(skb, p->port_no, &key); |
ccb1352e JG |
231 | if (unlikely(error)) { |
232 | kfree_skb(skb); | |
233 | return; | |
234 | } | |
235 | ||
236 | /* Look up flow. */ | |
5bb50632 | 237 | flow = ovs_flow_tbl_lookup_stats(&dp->table, &key, &n_mask_hit); |
ccb1352e JG |
238 | if (unlikely(!flow)) { |
239 | struct dp_upcall_info upcall; | |
240 | ||
241 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
242 | upcall.key = &key; | |
243 | upcall.userdata = NULL; | |
15e47304 | 244 | upcall.portid = p->upcall_portid; |
ccb1352e JG |
245 | ovs_dp_upcall(dp, skb, &upcall); |
246 | consume_skb(skb); | |
247 | stats_counter = &stats->n_missed; | |
248 | goto out; | |
249 | } | |
250 | ||
251 | OVS_CB(skb)->flow = flow; | |
03f0d916 | 252 | OVS_CB(skb)->pkt_key = &key; |
ccb1352e | 253 | |
e298e505 | 254 | ovs_flow_stats_update(OVS_CB(skb)->flow, skb); |
ccb1352e | 255 | ovs_execute_actions(dp, skb); |
e298e505 | 256 | stats_counter = &stats->n_hit; |
ccb1352e JG |
257 | |
258 | out: | |
259 | /* Update datapath statistics. */ | |
260 | u64_stats_update_begin(&stats->sync); | |
261 | (*stats_counter)++; | |
1bd7116f | 262 | stats->n_mask_hit += n_mask_hit; |
ccb1352e JG |
263 | u64_stats_update_end(&stats->sync); |
264 | } | |
265 | ||
266 | static struct genl_family dp_packet_genl_family = { | |
267 | .id = GENL_ID_GENERATE, | |
268 | .hdrsize = sizeof(struct ovs_header), | |
269 | .name = OVS_PACKET_FAMILY, | |
270 | .version = OVS_PACKET_VERSION, | |
46df7b81 | 271 | .maxattr = OVS_PACKET_ATTR_MAX, |
3a4e0d6a PS |
272 | .netnsok = true, |
273 | .parallel_ops = true, | |
ccb1352e JG |
274 | }; |
275 | ||
276 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, | |
46df7b81 | 277 | const struct dp_upcall_info *upcall_info) |
ccb1352e JG |
278 | { |
279 | struct dp_stats_percpu *stats; | |
280 | int dp_ifindex; | |
281 | int err; | |
282 | ||
15e47304 | 283 | if (upcall_info->portid == 0) { |
ccb1352e JG |
284 | err = -ENOTCONN; |
285 | goto err; | |
286 | } | |
287 | ||
288 | dp_ifindex = get_dpifindex(dp); | |
289 | if (!dp_ifindex) { | |
290 | err = -ENODEV; | |
291 | goto err; | |
292 | } | |
293 | ||
294 | if (!skb_is_gso(skb)) | |
46df7b81 | 295 | err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
ccb1352e | 296 | else |
46df7b81 | 297 | err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
ccb1352e JG |
298 | if (err) |
299 | goto err; | |
300 | ||
301 | return 0; | |
302 | ||
303 | err: | |
404f2f10 | 304 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e JG |
305 | |
306 | u64_stats_update_begin(&stats->sync); | |
307 | stats->n_lost++; | |
308 | u64_stats_update_end(&stats->sync); | |
309 | ||
310 | return err; | |
311 | } | |
312 | ||
46df7b81 PS |
313 | static int queue_gso_packets(struct net *net, int dp_ifindex, |
314 | struct sk_buff *skb, | |
ccb1352e JG |
315 | const struct dp_upcall_info *upcall_info) |
316 | { | |
a1b5d0dd | 317 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
ccb1352e JG |
318 | struct dp_upcall_info later_info; |
319 | struct sw_flow_key later_key; | |
320 | struct sk_buff *segs, *nskb; | |
321 | int err; | |
322 | ||
12b0004d | 323 | segs = __skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM, false); |
92e5dfc3 PS |
324 | if (IS_ERR(segs)) |
325 | return PTR_ERR(segs); | |
ccb1352e JG |
326 | |
327 | /* Queue all of the segments. */ | |
328 | skb = segs; | |
329 | do { | |
46df7b81 | 330 | err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info); |
ccb1352e JG |
331 | if (err) |
332 | break; | |
333 | ||
a1b5d0dd | 334 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
ccb1352e JG |
335 | /* The initial flow key extracted by ovs_flow_extract() |
336 | * in this case is for a first fragment, so we need to | |
337 | * properly mark later fragments. | |
338 | */ | |
339 | later_key = *upcall_info->key; | |
340 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
341 | ||
342 | later_info = *upcall_info; | |
343 | later_info.key = &later_key; | |
344 | upcall_info = &later_info; | |
345 | } | |
346 | } while ((skb = skb->next)); | |
347 | ||
348 | /* Free all of the segments. */ | |
349 | skb = segs; | |
350 | do { | |
351 | nskb = skb->next; | |
352 | if (err) | |
353 | kfree_skb(skb); | |
354 | else | |
355 | consume_skb(skb); | |
356 | } while ((skb = nskb)); | |
357 | return err; | |
358 | } | |
359 | ||
c3ff8cfe TG |
360 | static size_t key_attr_size(void) |
361 | { | |
362 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
7d5437c7 PS |
363 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ |
364 | + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
365 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
366 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
367 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
368 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
369 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
370 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
c3ff8cfe TG |
371 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ |
372 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
373 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
374 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
375 | + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */ | |
376 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
377 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
378 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
379 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
380 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
381 | } | |
382 | ||
383 | static size_t upcall_msg_size(const struct sk_buff *skb, | |
384 | const struct nlattr *userdata) | |
385 | { | |
386 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
387 | + nla_total_size(skb->len) /* OVS_PACKET_ATTR_PACKET */ | |
388 | + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */ | |
389 | ||
390 | /* OVS_PACKET_ATTR_USERDATA */ | |
391 | if (userdata) | |
392 | size += NLA_ALIGN(userdata->nla_len); | |
393 | ||
394 | return size; | |
395 | } | |
396 | ||
46df7b81 PS |
397 | static int queue_userspace_packet(struct net *net, int dp_ifindex, |
398 | struct sk_buff *skb, | |
ccb1352e JG |
399 | const struct dp_upcall_info *upcall_info) |
400 | { | |
401 | struct ovs_header *upcall; | |
402 | struct sk_buff *nskb = NULL; | |
403 | struct sk_buff *user_skb; /* to be queued to userspace */ | |
404 | struct nlattr *nla; | |
795449d8 TG |
405 | struct genl_info info = { |
406 | .dst_sk = net->genl_sock, | |
407 | .snd_portid = upcall_info->portid, | |
408 | }; | |
409 | size_t len; | |
ccb1352e JG |
410 | int err; |
411 | ||
412 | if (vlan_tx_tag_present(skb)) { | |
413 | nskb = skb_clone(skb, GFP_ATOMIC); | |
414 | if (!nskb) | |
415 | return -ENOMEM; | |
416 | ||
86a9bad3 | 417 | nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb)); |
8aa51d64 | 418 | if (!nskb) |
ccb1352e JG |
419 | return -ENOMEM; |
420 | ||
421 | nskb->vlan_tci = 0; | |
422 | skb = nskb; | |
423 | } | |
424 | ||
425 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
426 | err = -EFBIG; | |
427 | goto out; | |
428 | } | |
429 | ||
795449d8 TG |
430 | len = upcall_msg_size(skb, upcall_info->userdata); |
431 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); | |
ccb1352e JG |
432 | if (!user_skb) { |
433 | err = -ENOMEM; | |
434 | goto out; | |
435 | } | |
436 | ||
437 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
438 | 0, upcall_info->cmd); | |
439 | upcall->dp_ifindex = dp_ifindex; | |
440 | ||
441 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
e6445719 | 442 | ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb); |
ccb1352e JG |
443 | nla_nest_end(user_skb, nla); |
444 | ||
445 | if (upcall_info->userdata) | |
4490108b BP |
446 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
447 | nla_len(upcall_info->userdata), | |
448 | nla_data(upcall_info->userdata)); | |
ccb1352e JG |
449 | |
450 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); | |
451 | ||
452 | skb_copy_and_csum_dev(skb, nla_data(nla)); | |
453 | ||
a15ff76c | 454 | genlmsg_end(user_skb, upcall); |
15e47304 | 455 | err = genlmsg_unicast(net, user_skb, upcall_info->portid); |
ccb1352e JG |
456 | |
457 | out: | |
458 | kfree_skb(nskb); | |
459 | return err; | |
460 | } | |
461 | ||
ccb1352e JG |
462 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
463 | { | |
464 | struct ovs_header *ovs_header = info->userhdr; | |
465 | struct nlattr **a = info->attrs; | |
466 | struct sw_flow_actions *acts; | |
467 | struct sk_buff *packet; | |
468 | struct sw_flow *flow; | |
469 | struct datapath *dp; | |
470 | struct ethhdr *eth; | |
471 | int len; | |
472 | int err; | |
ccb1352e JG |
473 | |
474 | err = -EINVAL; | |
475 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 476 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
477 | goto err; |
478 | ||
479 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
480 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
481 | err = -ENOMEM; | |
482 | if (!packet) | |
483 | goto err; | |
484 | skb_reserve(packet, NET_IP_ALIGN); | |
485 | ||
32686a9d | 486 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e JG |
487 | |
488 | skb_reset_mac_header(packet); | |
489 | eth = eth_hdr(packet); | |
490 | ||
491 | /* Normally, setting the skb 'protocol' field would be handled by a | |
492 | * call to eth_type_trans(), but it assumes there's a sending | |
493 | * device, which we may not have. */ | |
e5c5d22e | 494 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
495 | packet->protocol = eth->h_proto; |
496 | else | |
497 | packet->protocol = htons(ETH_P_802_2); | |
498 | ||
499 | /* Build an sw_flow for sending this packet. */ | |
e298e505 | 500 | flow = ovs_flow_alloc(false); |
ccb1352e JG |
501 | err = PTR_ERR(flow); |
502 | if (IS_ERR(flow)) | |
503 | goto err_kfree_skb; | |
504 | ||
03f0d916 | 505 | err = ovs_flow_extract(packet, -1, &flow->key); |
ccb1352e JG |
506 | if (err) |
507 | goto err_flow_free; | |
508 | ||
e6445719 | 509 | err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]); |
ccb1352e JG |
510 | if (err) |
511 | goto err_flow_free; | |
e6445719 | 512 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
ccb1352e JG |
513 | err = PTR_ERR(acts); |
514 | if (IS_ERR(acts)) | |
515 | goto err_flow_free; | |
74f84a57 | 516 | |
e6445719 PS |
517 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
518 | &flow->key, 0, &acts); | |
ccb1352e | 519 | rcu_assign_pointer(flow->sf_acts, acts); |
74f84a57 PS |
520 | if (err) |
521 | goto err_flow_free; | |
ccb1352e JG |
522 | |
523 | OVS_CB(packet)->flow = flow; | |
03f0d916 | 524 | OVS_CB(packet)->pkt_key = &flow->key; |
ccb1352e | 525 | packet->priority = flow->key.phy.priority; |
39c7caeb | 526 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
527 | |
528 | rcu_read_lock(); | |
46df7b81 | 529 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
530 | err = -ENODEV; |
531 | if (!dp) | |
532 | goto err_unlock; | |
533 | ||
534 | local_bh_disable(); | |
535 | err = ovs_execute_actions(dp, packet); | |
536 | local_bh_enable(); | |
537 | rcu_read_unlock(); | |
538 | ||
03f0d916 | 539 | ovs_flow_free(flow, false); |
ccb1352e JG |
540 | return err; |
541 | ||
542 | err_unlock: | |
543 | rcu_read_unlock(); | |
544 | err_flow_free: | |
03f0d916 | 545 | ovs_flow_free(flow, false); |
ccb1352e JG |
546 | err_kfree_skb: |
547 | kfree_skb(packet); | |
548 | err: | |
549 | return err; | |
550 | } | |
551 | ||
552 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 553 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
554 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
555 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
556 | }; | |
557 | ||
4534de83 | 558 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e JG |
559 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
560 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
561 | .policy = packet_policy, | |
562 | .doit = ovs_packet_cmd_execute | |
563 | } | |
564 | }; | |
565 | ||
1bd7116f AZ |
566 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats, |
567 | struct ovs_dp_megaflow_stats *mega_stats) | |
ccb1352e JG |
568 | { |
569 | int i; | |
ccb1352e | 570 | |
1bd7116f AZ |
571 | memset(mega_stats, 0, sizeof(*mega_stats)); |
572 | ||
b637e498 | 573 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 574 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
575 | |
576 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 577 | |
ccb1352e JG |
578 | for_each_possible_cpu(i) { |
579 | const struct dp_stats_percpu *percpu_stats; | |
580 | struct dp_stats_percpu local_stats; | |
581 | unsigned int start; | |
582 | ||
583 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
584 | ||
585 | do { | |
586 | start = u64_stats_fetch_begin_bh(&percpu_stats->sync); | |
587 | local_stats = *percpu_stats; | |
588 | } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); | |
589 | ||
590 | stats->n_hit += local_stats.n_hit; | |
591 | stats->n_missed += local_stats.n_missed; | |
592 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 593 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
594 | } |
595 | } | |
596 | ||
597 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { | |
598 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
599 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
600 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
601 | }; | |
602 | ||
603 | static struct genl_family dp_flow_genl_family = { | |
604 | .id = GENL_ID_GENERATE, | |
605 | .hdrsize = sizeof(struct ovs_header), | |
606 | .name = OVS_FLOW_FAMILY, | |
607 | .version = OVS_FLOW_VERSION, | |
46df7b81 | 608 | .maxattr = OVS_FLOW_ATTR_MAX, |
3a4e0d6a PS |
609 | .netnsok = true, |
610 | .parallel_ops = true, | |
ccb1352e JG |
611 | }; |
612 | ||
613 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { | |
614 | .name = OVS_FLOW_MCGROUP | |
615 | }; | |
616 | ||
c3ff8cfe TG |
617 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
618 | { | |
619 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
620 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
03f0d916 | 621 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */ |
c3ff8cfe TG |
622 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
623 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
624 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
625 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
626 | } | |
627 | ||
8e4e1713 | 628 | /* Called with ovs_mutex. */ |
ccb1352e | 629 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
15e47304 | 630 | struct sk_buff *skb, u32 portid, |
ccb1352e JG |
631 | u32 seq, u32 flags, u8 cmd) |
632 | { | |
633 | const int skb_orig_len = skb->len; | |
74f84a57 | 634 | struct nlattr *start; |
ccb1352e | 635 | struct ovs_flow_stats stats; |
e298e505 PS |
636 | __be16 tcp_flags; |
637 | unsigned long used; | |
ccb1352e JG |
638 | struct ovs_header *ovs_header; |
639 | struct nlattr *nla; | |
ccb1352e JG |
640 | int err; |
641 | ||
15e47304 | 642 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
ccb1352e JG |
643 | if (!ovs_header) |
644 | return -EMSGSIZE; | |
645 | ||
646 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
647 | ||
03f0d916 | 648 | /* Fill flow key. */ |
ccb1352e JG |
649 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
650 | if (!nla) | |
651 | goto nla_put_failure; | |
03f0d916 | 652 | |
e6445719 | 653 | err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb); |
03f0d916 AZ |
654 | if (err) |
655 | goto error; | |
656 | nla_nest_end(skb, nla); | |
657 | ||
658 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); | |
659 | if (!nla) | |
660 | goto nla_put_failure; | |
661 | ||
e6445719 | 662 | err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb); |
ccb1352e JG |
663 | if (err) |
664 | goto error; | |
03f0d916 | 665 | |
ccb1352e JG |
666 | nla_nest_end(skb, nla); |
667 | ||
e298e505 | 668 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
028d6a67 DM |
669 | if (used && |
670 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
671 | goto nla_put_failure; | |
ccb1352e | 672 | |
028d6a67 | 673 | if (stats.n_packets && |
e298e505 | 674 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) |
028d6a67 | 675 | goto nla_put_failure; |
ccb1352e | 676 | |
e298e505 PS |
677 | if ((u8)ntohs(tcp_flags) && |
678 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
028d6a67 | 679 | goto nla_put_failure; |
ccb1352e JG |
680 | |
681 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
682 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
683 | * Netlink but individual action lists can be longer than | |
684 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
685 | * The userspace caller can always fetch the actions separately if it | |
686 | * really wants them. (Most userspace callers in fact don't care.) | |
687 | * | |
688 | * This can only fail for dump operations because the skb is always | |
689 | * properly sized for single flows. | |
690 | */ | |
74f84a57 PS |
691 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
692 | if (start) { | |
d57170b1 PS |
693 | const struct sw_flow_actions *sf_acts; |
694 | ||
663efa36 | 695 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
d57170b1 | 696 | |
e6445719 PS |
697 | err = ovs_nla_put_actions(sf_acts->actions, |
698 | sf_acts->actions_len, skb); | |
74f84a57 PS |
699 | if (!err) |
700 | nla_nest_end(skb, start); | |
701 | else { | |
702 | if (skb_orig_len) | |
703 | goto error; | |
704 | ||
705 | nla_nest_cancel(skb, start); | |
706 | } | |
707 | } else if (skb_orig_len) | |
708 | goto nla_put_failure; | |
ccb1352e JG |
709 | |
710 | return genlmsg_end(skb, ovs_header); | |
711 | ||
712 | nla_put_failure: | |
713 | err = -EMSGSIZE; | |
714 | error: | |
715 | genlmsg_cancel(skb, ovs_header); | |
716 | return err; | |
717 | } | |
718 | ||
795449d8 TG |
719 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow, |
720 | struct genl_info *info) | |
ccb1352e | 721 | { |
795449d8 | 722 | size_t len; |
ccb1352e | 723 | |
795449d8 | 724 | len = ovs_flow_cmd_msg_size(ovsl_dereference(flow->sf_acts)); |
ccb1352e | 725 | |
795449d8 | 726 | return genlmsg_new_unicast(len, info, GFP_KERNEL); |
ccb1352e JG |
727 | } |
728 | ||
729 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, | |
730 | struct datapath *dp, | |
795449d8 TG |
731 | struct genl_info *info, |
732 | u8 cmd) | |
ccb1352e JG |
733 | { |
734 | struct sk_buff *skb; | |
735 | int retval; | |
736 | ||
795449d8 | 737 | skb = ovs_flow_cmd_alloc_info(flow, info); |
ccb1352e JG |
738 | if (!skb) |
739 | return ERR_PTR(-ENOMEM); | |
740 | ||
795449d8 TG |
741 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, info->snd_portid, |
742 | info->snd_seq, 0, cmd); | |
ccb1352e JG |
743 | BUG_ON(retval < 0); |
744 | return skb; | |
745 | } | |
746 | ||
747 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) | |
748 | { | |
749 | struct nlattr **a = info->attrs; | |
750 | struct ovs_header *ovs_header = info->userhdr; | |
03f0d916 AZ |
751 | struct sw_flow_key key, masked_key; |
752 | struct sw_flow *flow = NULL; | |
753 | struct sw_flow_mask mask; | |
ccb1352e JG |
754 | struct sk_buff *reply; |
755 | struct datapath *dp; | |
74f84a57 | 756 | struct sw_flow_actions *acts = NULL; |
03f0d916 | 757 | struct sw_flow_match match; |
e298e505 | 758 | bool exact_5tuple; |
ccb1352e | 759 | int error; |
ccb1352e JG |
760 | |
761 | /* Extract key. */ | |
762 | error = -EINVAL; | |
763 | if (!a[OVS_FLOW_ATTR_KEY]) | |
764 | goto error; | |
03f0d916 AZ |
765 | |
766 | ovs_match_init(&match, &key, &mask); | |
e298e505 | 767 | error = ovs_nla_get_match(&match, &exact_5tuple, |
e6445719 | 768 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); |
ccb1352e JG |
769 | if (error) |
770 | goto error; | |
771 | ||
772 | /* Validate actions. */ | |
773 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
e6445719 | 774 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
74f84a57 PS |
775 | error = PTR_ERR(acts); |
776 | if (IS_ERR(acts)) | |
ccb1352e | 777 | goto error; |
74f84a57 | 778 | |
e6445719 PS |
779 | ovs_flow_mask_key(&masked_key, &key, &mask); |
780 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], | |
781 | &masked_key, 0, &acts); | |
03f0d916 AZ |
782 | if (error) { |
783 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
74f84a57 | 784 | goto err_kfree; |
03f0d916 | 785 | } |
ccb1352e JG |
786 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
787 | error = -EINVAL; | |
788 | goto error; | |
789 | } | |
790 | ||
8e4e1713 | 791 | ovs_lock(); |
46df7b81 | 792 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
793 | error = -ENODEV; |
794 | if (!dp) | |
8e4e1713 | 795 | goto err_unlock_ovs; |
ccb1352e | 796 | |
03f0d916 | 797 | /* Check if this is a duplicate flow */ |
5bb50632 | 798 | flow = ovs_flow_tbl_lookup(&dp->table, &key); |
ccb1352e | 799 | if (!flow) { |
ccb1352e JG |
800 | /* Bail out if we're not allowed to create a new flow. */ |
801 | error = -ENOENT; | |
802 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) | |
8e4e1713 | 803 | goto err_unlock_ovs; |
ccb1352e | 804 | |
ccb1352e | 805 | /* Allocate flow. */ |
e298e505 | 806 | flow = ovs_flow_alloc(!exact_5tuple); |
ccb1352e JG |
807 | if (IS_ERR(flow)) { |
808 | error = PTR_ERR(flow); | |
8e4e1713 | 809 | goto err_unlock_ovs; |
ccb1352e | 810 | } |
ccb1352e | 811 | |
03f0d916 AZ |
812 | flow->key = masked_key; |
813 | flow->unmasked_key = key; | |
ccb1352e JG |
814 | rcu_assign_pointer(flow->sf_acts, acts); |
815 | ||
816 | /* Put flow in bucket. */ | |
618ed0c8 PS |
817 | error = ovs_flow_tbl_insert(&dp->table, flow, &mask); |
818 | if (error) { | |
819 | acts = NULL; | |
820 | goto err_flow_free; | |
821 | } | |
ccb1352e | 822 | |
795449d8 | 823 | reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW); |
ccb1352e JG |
824 | } else { |
825 | /* We found a matching flow. */ | |
826 | struct sw_flow_actions *old_acts; | |
ccb1352e JG |
827 | |
828 | /* Bail out if we're not allowed to modify an existing flow. | |
829 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
830 | * because Generic Netlink treats the latter as a dump | |
831 | * request. We also accept NLM_F_EXCL in case that bug ever | |
832 | * gets fixed. | |
833 | */ | |
834 | error = -EEXIST; | |
835 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && | |
836 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) | |
8e4e1713 | 837 | goto err_unlock_ovs; |
ccb1352e | 838 | |
03f0d916 AZ |
839 | /* The unmasked key has to be the same for flow updates. */ |
840 | error = -EINVAL; | |
e6445719 | 841 | if (!ovs_flow_cmp_unmasked_key(flow, &match)) { |
03f0d916 AZ |
842 | OVS_NLERR("Flow modification message rejected, unmasked key does not match.\n"); |
843 | goto err_unlock_ovs; | |
844 | } | |
845 | ||
ccb1352e | 846 | /* Update actions. */ |
8e4e1713 | 847 | old_acts = ovsl_dereference(flow->sf_acts); |
74f84a57 | 848 | rcu_assign_pointer(flow->sf_acts, acts); |
e6445719 | 849 | ovs_nla_free_flow_actions(old_acts); |
ccb1352e | 850 | |
795449d8 | 851 | reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW); |
ccb1352e JG |
852 | |
853 | /* Clear stats. */ | |
e298e505 PS |
854 | if (a[OVS_FLOW_ATTR_CLEAR]) |
855 | ovs_flow_stats_clear(flow); | |
ccb1352e | 856 | } |
8e4e1713 | 857 | ovs_unlock(); |
ccb1352e JG |
858 | |
859 | if (!IS_ERR(reply)) | |
2a94fe48 | 860 | ovs_notify(&dp_flow_genl_family, reply, info); |
ccb1352e | 861 | else |
68eb5503 | 862 | genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0, |
2a94fe48 | 863 | 0, PTR_ERR(reply)); |
ccb1352e JG |
864 | return 0; |
865 | ||
03f0d916 AZ |
866 | err_flow_free: |
867 | ovs_flow_free(flow, false); | |
8e4e1713 PS |
868 | err_unlock_ovs: |
869 | ovs_unlock(); | |
74f84a57 PS |
870 | err_kfree: |
871 | kfree(acts); | |
ccb1352e JG |
872 | error: |
873 | return error; | |
874 | } | |
875 | ||
876 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
877 | { | |
878 | struct nlattr **a = info->attrs; | |
879 | struct ovs_header *ovs_header = info->userhdr; | |
880 | struct sw_flow_key key; | |
881 | struct sk_buff *reply; | |
882 | struct sw_flow *flow; | |
883 | struct datapath *dp; | |
03f0d916 | 884 | struct sw_flow_match match; |
ccb1352e | 885 | int err; |
ccb1352e | 886 | |
03f0d916 AZ |
887 | if (!a[OVS_FLOW_ATTR_KEY]) { |
888 | OVS_NLERR("Flow get message rejected, Key attribute missing.\n"); | |
ccb1352e | 889 | return -EINVAL; |
03f0d916 AZ |
890 | } |
891 | ||
892 | ovs_match_init(&match, &key, NULL); | |
e298e505 | 893 | err = ovs_nla_get_match(&match, NULL, a[OVS_FLOW_ATTR_KEY], NULL); |
ccb1352e JG |
894 | if (err) |
895 | return err; | |
896 | ||
8e4e1713 | 897 | ovs_lock(); |
46df7b81 | 898 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
899 | if (!dp) { |
900 | err = -ENODEV; | |
901 | goto unlock; | |
902 | } | |
ccb1352e | 903 | |
5bb50632 | 904 | flow = ovs_flow_tbl_lookup(&dp->table, &key); |
e6445719 | 905 | if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) { |
8e4e1713 PS |
906 | err = -ENOENT; |
907 | goto unlock; | |
908 | } | |
ccb1352e | 909 | |
795449d8 | 910 | reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW); |
8e4e1713 PS |
911 | if (IS_ERR(reply)) { |
912 | err = PTR_ERR(reply); | |
913 | goto unlock; | |
914 | } | |
ccb1352e | 915 | |
8e4e1713 | 916 | ovs_unlock(); |
ccb1352e | 917 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
918 | unlock: |
919 | ovs_unlock(); | |
920 | return err; | |
ccb1352e JG |
921 | } |
922 | ||
923 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
924 | { | |
925 | struct nlattr **a = info->attrs; | |
926 | struct ovs_header *ovs_header = info->userhdr; | |
927 | struct sw_flow_key key; | |
928 | struct sk_buff *reply; | |
929 | struct sw_flow *flow; | |
930 | struct datapath *dp; | |
03f0d916 | 931 | struct sw_flow_match match; |
ccb1352e | 932 | int err; |
ccb1352e | 933 | |
8e4e1713 | 934 | ovs_lock(); |
46df7b81 | 935 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
936 | if (!dp) { |
937 | err = -ENODEV; | |
938 | goto unlock; | |
939 | } | |
46df7b81 | 940 | |
8e4e1713 | 941 | if (!a[OVS_FLOW_ATTR_KEY]) { |
b637e498 | 942 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
943 | goto unlock; |
944 | } | |
03f0d916 AZ |
945 | |
946 | ovs_match_init(&match, &key, NULL); | |
e298e505 | 947 | err = ovs_nla_get_match(&match, NULL, a[OVS_FLOW_ATTR_KEY], NULL); |
ccb1352e | 948 | if (err) |
8e4e1713 | 949 | goto unlock; |
ccb1352e | 950 | |
5bb50632 | 951 | flow = ovs_flow_tbl_lookup(&dp->table, &key); |
e6445719 | 952 | if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) { |
8e4e1713 PS |
953 | err = -ENOENT; |
954 | goto unlock; | |
955 | } | |
ccb1352e | 956 | |
795449d8 | 957 | reply = ovs_flow_cmd_alloc_info(flow, info); |
8e4e1713 PS |
958 | if (!reply) { |
959 | err = -ENOMEM; | |
960 | goto unlock; | |
961 | } | |
ccb1352e | 962 | |
b637e498 | 963 | ovs_flow_tbl_remove(&dp->table, flow); |
ccb1352e | 964 | |
15e47304 | 965 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid, |
ccb1352e JG |
966 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); |
967 | BUG_ON(err < 0); | |
968 | ||
03f0d916 | 969 | ovs_flow_free(flow, true); |
8e4e1713 | 970 | ovs_unlock(); |
ccb1352e | 971 | |
2a94fe48 | 972 | ovs_notify(&dp_flow_genl_family, reply, info); |
ccb1352e | 973 | return 0; |
8e4e1713 PS |
974 | unlock: |
975 | ovs_unlock(); | |
976 | return err; | |
ccb1352e JG |
977 | } |
978 | ||
979 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
980 | { | |
981 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
b637e498 | 982 | struct table_instance *ti; |
ccb1352e | 983 | struct datapath *dp; |
ccb1352e | 984 | |
d57170b1 | 985 | rcu_read_lock(); |
46df7b81 | 986 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 987 | if (!dp) { |
d57170b1 | 988 | rcu_read_unlock(); |
ccb1352e | 989 | return -ENODEV; |
8e4e1713 | 990 | } |
ccb1352e | 991 | |
b637e498 | 992 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
993 | for (;;) { |
994 | struct sw_flow *flow; | |
995 | u32 bucket, obj; | |
996 | ||
997 | bucket = cb->args[0]; | |
998 | obj = cb->args[1]; | |
b637e498 | 999 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1000 | if (!flow) |
1001 | break; | |
1002 | ||
1003 | if (ovs_flow_cmd_fill_info(flow, dp, skb, | |
15e47304 | 1004 | NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1005 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1006 | OVS_FLOW_CMD_NEW) < 0) | |
1007 | break; | |
1008 | ||
1009 | cb->args[0] = bucket; | |
1010 | cb->args[1] = obj; | |
1011 | } | |
d57170b1 | 1012 | rcu_read_unlock(); |
ccb1352e JG |
1013 | return skb->len; |
1014 | } | |
1015 | ||
4534de83 | 1016 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e JG |
1017 | { .cmd = OVS_FLOW_CMD_NEW, |
1018 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1019 | .policy = flow_policy, | |
1020 | .doit = ovs_flow_cmd_new_or_set | |
1021 | }, | |
1022 | { .cmd = OVS_FLOW_CMD_DEL, | |
1023 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1024 | .policy = flow_policy, | |
1025 | .doit = ovs_flow_cmd_del | |
1026 | }, | |
1027 | { .cmd = OVS_FLOW_CMD_GET, | |
1028 | .flags = 0, /* OK for unprivileged users. */ | |
1029 | .policy = flow_policy, | |
1030 | .doit = ovs_flow_cmd_get, | |
1031 | .dumpit = ovs_flow_cmd_dump | |
1032 | }, | |
1033 | { .cmd = OVS_FLOW_CMD_SET, | |
1034 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1035 | .policy = flow_policy, | |
1036 | .doit = ovs_flow_cmd_new_or_set, | |
1037 | }, | |
1038 | }; | |
1039 | ||
1040 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { | |
1041 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1042 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
43d4be9c | 1043 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, |
ccb1352e JG |
1044 | }; |
1045 | ||
1046 | static struct genl_family dp_datapath_genl_family = { | |
1047 | .id = GENL_ID_GENERATE, | |
1048 | .hdrsize = sizeof(struct ovs_header), | |
1049 | .name = OVS_DATAPATH_FAMILY, | |
1050 | .version = OVS_DATAPATH_VERSION, | |
46df7b81 | 1051 | .maxattr = OVS_DP_ATTR_MAX, |
3a4e0d6a PS |
1052 | .netnsok = true, |
1053 | .parallel_ops = true, | |
ccb1352e JG |
1054 | }; |
1055 | ||
1056 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { | |
1057 | .name = OVS_DATAPATH_MCGROUP | |
1058 | }; | |
1059 | ||
c3ff8cfe TG |
1060 | static size_t ovs_dp_cmd_msg_size(void) |
1061 | { | |
1062 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1063 | ||
1064 | msgsize += nla_total_size(IFNAMSIZ); | |
1065 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1bd7116f | 1066 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
c3ff8cfe TG |
1067 | |
1068 | return msgsize; | |
1069 | } | |
1070 | ||
ccb1352e | 1071 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1072 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1073 | { |
1074 | struct ovs_header *ovs_header; | |
1075 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1076 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1077 | int err; |
1078 | ||
15e47304 | 1079 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1080 | flags, cmd); |
1081 | if (!ovs_header) | |
1082 | goto error; | |
1083 | ||
1084 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1085 | ||
1086 | rcu_read_lock(); | |
1087 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); | |
1088 | rcu_read_unlock(); | |
1089 | if (err) | |
1090 | goto nla_put_failure; | |
1091 | ||
1bd7116f AZ |
1092 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1093 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1094 | &dp_stats)) | |
1095 | goto nla_put_failure; | |
1096 | ||
1097 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1098 | sizeof(struct ovs_dp_megaflow_stats), | |
1099 | &dp_megaflow_stats)) | |
028d6a67 | 1100 | goto nla_put_failure; |
ccb1352e | 1101 | |
43d4be9c TG |
1102 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1103 | goto nla_put_failure; | |
1104 | ||
ccb1352e JG |
1105 | return genlmsg_end(skb, ovs_header); |
1106 | ||
1107 | nla_put_failure: | |
1108 | genlmsg_cancel(skb, ovs_header); | |
1109 | error: | |
1110 | return -EMSGSIZE; | |
1111 | } | |
1112 | ||
795449d8 TG |
1113 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, |
1114 | struct genl_info *info, u8 cmd) | |
ccb1352e JG |
1115 | { |
1116 | struct sk_buff *skb; | |
1117 | int retval; | |
1118 | ||
795449d8 | 1119 | skb = genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
ccb1352e JG |
1120 | if (!skb) |
1121 | return ERR_PTR(-ENOMEM); | |
1122 | ||
795449d8 | 1123 | retval = ovs_dp_cmd_fill_info(dp, skb, info->snd_portid, info->snd_seq, 0, cmd); |
ccb1352e JG |
1124 | if (retval < 0) { |
1125 | kfree_skb(skb); | |
1126 | return ERR_PTR(retval); | |
1127 | } | |
1128 | return skb; | |
1129 | } | |
1130 | ||
8e4e1713 | 1131 | /* Called with ovs_mutex. */ |
46df7b81 PS |
1132 | static struct datapath *lookup_datapath(struct net *net, |
1133 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1134 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1135 | { | |
1136 | struct datapath *dp; | |
1137 | ||
1138 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1139 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1140 | else { |
1141 | struct vport *vport; | |
1142 | ||
1143 | rcu_read_lock(); | |
46df7b81 | 1144 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e JG |
1145 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
1146 | rcu_read_unlock(); | |
1147 | } | |
1148 | return dp ? dp : ERR_PTR(-ENODEV); | |
1149 | } | |
1150 | ||
43d4be9c TG |
1151 | static void ovs_dp_change(struct datapath *dp, struct nlattr **a) |
1152 | { | |
1153 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1154 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1155 | } | |
1156 | ||
ccb1352e JG |
1157 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1158 | { | |
1159 | struct nlattr **a = info->attrs; | |
1160 | struct vport_parms parms; | |
1161 | struct sk_buff *reply; | |
1162 | struct datapath *dp; | |
1163 | struct vport *vport; | |
46df7b81 | 1164 | struct ovs_net *ovs_net; |
15eac2a7 | 1165 | int err, i; |
ccb1352e JG |
1166 | |
1167 | err = -EINVAL; | |
1168 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1169 | goto err; | |
1170 | ||
8e4e1713 | 1171 | ovs_lock(); |
ccb1352e JG |
1172 | |
1173 | err = -ENOMEM; | |
1174 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1175 | if (dp == NULL) | |
8e4e1713 | 1176 | goto err_unlock_ovs; |
46df7b81 | 1177 | |
46df7b81 | 1178 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
ccb1352e JG |
1179 | |
1180 | /* Allocate table. */ | |
b637e498 PS |
1181 | err = ovs_flow_tbl_init(&dp->table); |
1182 | if (err) | |
ccb1352e JG |
1183 | goto err_free_dp; |
1184 | ||
1185 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); | |
1186 | if (!dp->stats_percpu) { | |
1187 | err = -ENOMEM; | |
1188 | goto err_destroy_table; | |
1189 | } | |
1190 | ||
827da44c JS |
1191 | for_each_possible_cpu(i) { |
1192 | struct dp_stats_percpu *dpath_stats; | |
1193 | dpath_stats = per_cpu_ptr(dp->stats_percpu, i); | |
1194 | u64_stats_init(&dpath_stats->sync); | |
1195 | } | |
1196 | ||
15eac2a7 | 1197 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
e6445719 | 1198 | GFP_KERNEL); |
15eac2a7 PS |
1199 | if (!dp->ports) { |
1200 | err = -ENOMEM; | |
1201 | goto err_destroy_percpu; | |
1202 | } | |
1203 | ||
1204 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1205 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1206 | ||
ccb1352e JG |
1207 | /* Set up our datapath device. */ |
1208 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1209 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1210 | parms.options = NULL; | |
1211 | parms.dp = dp; | |
1212 | parms.port_no = OVSP_LOCAL; | |
15e47304 | 1213 | parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
ccb1352e | 1214 | |
43d4be9c TG |
1215 | ovs_dp_change(dp, a); |
1216 | ||
ccb1352e JG |
1217 | vport = new_vport(&parms); |
1218 | if (IS_ERR(vport)) { | |
1219 | err = PTR_ERR(vport); | |
1220 | if (err == -EBUSY) | |
1221 | err = -EEXIST; | |
1222 | ||
15eac2a7 | 1223 | goto err_destroy_ports_array; |
ccb1352e JG |
1224 | } |
1225 | ||
795449d8 | 1226 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW); |
ccb1352e JG |
1227 | err = PTR_ERR(reply); |
1228 | if (IS_ERR(reply)) | |
1229 | goto err_destroy_local_port; | |
1230 | ||
46df7b81 | 1231 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1232 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1233 | |
1234 | ovs_unlock(); | |
ccb1352e | 1235 | |
2a94fe48 | 1236 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1237 | return 0; |
1238 | ||
1239 | err_destroy_local_port: | |
8e4e1713 | 1240 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
15eac2a7 PS |
1241 | err_destroy_ports_array: |
1242 | kfree(dp->ports); | |
ccb1352e JG |
1243 | err_destroy_percpu: |
1244 | free_percpu(dp->stats_percpu); | |
1245 | err_destroy_table: | |
618ed0c8 | 1246 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 1247 | err_free_dp: |
46df7b81 | 1248 | release_net(ovs_dp_get_net(dp)); |
ccb1352e | 1249 | kfree(dp); |
8e4e1713 PS |
1250 | err_unlock_ovs: |
1251 | ovs_unlock(); | |
ccb1352e JG |
1252 | err: |
1253 | return err; | |
1254 | } | |
1255 | ||
8e4e1713 | 1256 | /* Called with ovs_mutex. */ |
46df7b81 | 1257 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1258 | { |
15eac2a7 | 1259 | int i; |
ccb1352e | 1260 | |
15eac2a7 PS |
1261 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1262 | struct vport *vport; | |
b67bfe0d | 1263 | struct hlist_node *n; |
15eac2a7 | 1264 | |
b67bfe0d | 1265 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1266 | if (vport->port_no != OVSP_LOCAL) |
1267 | ovs_dp_detach_port(vport); | |
1268 | } | |
ccb1352e | 1269 | |
59a35d60 | 1270 | list_del_rcu(&dp->list_node); |
ccb1352e | 1271 | |
8e4e1713 PS |
1272 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
1273 | * all port in datapath are destroyed first before freeing datapath. | |
ccb1352e | 1274 | */ |
8e4e1713 | 1275 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e JG |
1276 | |
1277 | call_rcu(&dp->rcu, destroy_dp_rcu); | |
46df7b81 PS |
1278 | } |
1279 | ||
1280 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1281 | { | |
1282 | struct sk_buff *reply; | |
1283 | struct datapath *dp; | |
1284 | int err; | |
1285 | ||
8e4e1713 | 1286 | ovs_lock(); |
46df7b81 PS |
1287 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1288 | err = PTR_ERR(dp); | |
1289 | if (IS_ERR(dp)) | |
8e4e1713 | 1290 | goto unlock; |
46df7b81 | 1291 | |
795449d8 | 1292 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_DEL); |
46df7b81 PS |
1293 | err = PTR_ERR(reply); |
1294 | if (IS_ERR(reply)) | |
8e4e1713 | 1295 | goto unlock; |
46df7b81 PS |
1296 | |
1297 | __dp_destroy(dp); | |
8e4e1713 | 1298 | ovs_unlock(); |
ccb1352e | 1299 | |
2a94fe48 | 1300 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1301 | |
1302 | return 0; | |
8e4e1713 PS |
1303 | unlock: |
1304 | ovs_unlock(); | |
1305 | return err; | |
ccb1352e JG |
1306 | } |
1307 | ||
1308 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1309 | { | |
1310 | struct sk_buff *reply; | |
1311 | struct datapath *dp; | |
1312 | int err; | |
1313 | ||
8e4e1713 | 1314 | ovs_lock(); |
46df7b81 | 1315 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1316 | err = PTR_ERR(dp); |
ccb1352e | 1317 | if (IS_ERR(dp)) |
8e4e1713 | 1318 | goto unlock; |
ccb1352e | 1319 | |
43d4be9c TG |
1320 | ovs_dp_change(dp, info->attrs); |
1321 | ||
795449d8 | 1322 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW); |
ccb1352e JG |
1323 | if (IS_ERR(reply)) { |
1324 | err = PTR_ERR(reply); | |
68eb5503 | 1325 | genl_set_err(&dp_datapath_genl_family, sock_net(skb->sk), 0, |
2a94fe48 | 1326 | 0, err); |
8e4e1713 PS |
1327 | err = 0; |
1328 | goto unlock; | |
ccb1352e JG |
1329 | } |
1330 | ||
8e4e1713 | 1331 | ovs_unlock(); |
2a94fe48 | 1332 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1333 | |
1334 | return 0; | |
8e4e1713 PS |
1335 | unlock: |
1336 | ovs_unlock(); | |
1337 | return err; | |
ccb1352e JG |
1338 | } |
1339 | ||
1340 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1341 | { | |
1342 | struct sk_buff *reply; | |
1343 | struct datapath *dp; | |
8e4e1713 | 1344 | int err; |
ccb1352e | 1345 | |
8e4e1713 | 1346 | ovs_lock(); |
46df7b81 | 1347 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1348 | if (IS_ERR(dp)) { |
1349 | err = PTR_ERR(dp); | |
1350 | goto unlock; | |
1351 | } | |
ccb1352e | 1352 | |
795449d8 | 1353 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW); |
8e4e1713 PS |
1354 | if (IS_ERR(reply)) { |
1355 | err = PTR_ERR(reply); | |
1356 | goto unlock; | |
1357 | } | |
ccb1352e | 1358 | |
8e4e1713 | 1359 | ovs_unlock(); |
ccb1352e | 1360 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1361 | |
1362 | unlock: | |
1363 | ovs_unlock(); | |
1364 | return err; | |
ccb1352e JG |
1365 | } |
1366 | ||
1367 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1368 | { | |
46df7b81 | 1369 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1370 | struct datapath *dp; |
1371 | int skip = cb->args[0]; | |
1372 | int i = 0; | |
1373 | ||
59a35d60 PS |
1374 | rcu_read_lock(); |
1375 | list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1376 | if (i >= skip && |
15e47304 | 1377 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1378 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1379 | OVS_DP_CMD_NEW) < 0) | |
1380 | break; | |
1381 | i++; | |
1382 | } | |
59a35d60 | 1383 | rcu_read_unlock(); |
ccb1352e JG |
1384 | |
1385 | cb->args[0] = i; | |
1386 | ||
1387 | return skb->len; | |
1388 | } | |
1389 | ||
4534de83 | 1390 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e JG |
1391 | { .cmd = OVS_DP_CMD_NEW, |
1392 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1393 | .policy = datapath_policy, | |
1394 | .doit = ovs_dp_cmd_new | |
1395 | }, | |
1396 | { .cmd = OVS_DP_CMD_DEL, | |
1397 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1398 | .policy = datapath_policy, | |
1399 | .doit = ovs_dp_cmd_del | |
1400 | }, | |
1401 | { .cmd = OVS_DP_CMD_GET, | |
1402 | .flags = 0, /* OK for unprivileged users. */ | |
1403 | .policy = datapath_policy, | |
1404 | .doit = ovs_dp_cmd_get, | |
1405 | .dumpit = ovs_dp_cmd_dump | |
1406 | }, | |
1407 | { .cmd = OVS_DP_CMD_SET, | |
1408 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1409 | .policy = datapath_policy, | |
1410 | .doit = ovs_dp_cmd_set, | |
1411 | }, | |
1412 | }; | |
1413 | ||
1414 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { | |
1415 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1416 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
1417 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
1418 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
1419 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1420 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
1421 | }; | |
1422 | ||
68eb5503 | 1423 | struct genl_family dp_vport_genl_family = { |
ccb1352e JG |
1424 | .id = GENL_ID_GENERATE, |
1425 | .hdrsize = sizeof(struct ovs_header), | |
1426 | .name = OVS_VPORT_FAMILY, | |
1427 | .version = OVS_VPORT_VERSION, | |
46df7b81 | 1428 | .maxattr = OVS_VPORT_ATTR_MAX, |
3a4e0d6a PS |
1429 | .netnsok = true, |
1430 | .parallel_ops = true, | |
ccb1352e JG |
1431 | }; |
1432 | ||
1433 | struct genl_multicast_group ovs_dp_vport_multicast_group = { | |
1434 | .name = OVS_VPORT_MCGROUP | |
1435 | }; | |
1436 | ||
8e4e1713 | 1437 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1438 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1439 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1440 | { |
1441 | struct ovs_header *ovs_header; | |
1442 | struct ovs_vport_stats vport_stats; | |
1443 | int err; | |
1444 | ||
15e47304 | 1445 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1446 | flags, cmd); |
1447 | if (!ovs_header) | |
1448 | return -EMSGSIZE; | |
1449 | ||
1450 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1451 | ||
028d6a67 DM |
1452 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1453 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
1454 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || | |
15e47304 | 1455 | nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid)) |
028d6a67 | 1456 | goto nla_put_failure; |
ccb1352e JG |
1457 | |
1458 | ovs_vport_get_stats(vport, &vport_stats); | |
028d6a67 DM |
1459 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1460 | &vport_stats)) | |
1461 | goto nla_put_failure; | |
ccb1352e JG |
1462 | |
1463 | err = ovs_vport_get_options(vport, skb); | |
1464 | if (err == -EMSGSIZE) | |
1465 | goto error; | |
1466 | ||
1467 | return genlmsg_end(skb, ovs_header); | |
1468 | ||
1469 | nla_put_failure: | |
1470 | err = -EMSGSIZE; | |
1471 | error: | |
1472 | genlmsg_cancel(skb, ovs_header); | |
1473 | return err; | |
1474 | } | |
1475 | ||
8e4e1713 | 1476 | /* Called with ovs_mutex or RCU read lock. */ |
15e47304 | 1477 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1478 | u32 seq, u8 cmd) |
1479 | { | |
1480 | struct sk_buff *skb; | |
1481 | int retval; | |
1482 | ||
1483 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1484 | if (!skb) | |
1485 | return ERR_PTR(-ENOMEM); | |
1486 | ||
15e47304 | 1487 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1488 | BUG_ON(retval < 0); |
1489 | ||
ccb1352e JG |
1490 | return skb; |
1491 | } | |
1492 | ||
8e4e1713 | 1493 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 PS |
1494 | static struct vport *lookup_vport(struct net *net, |
1495 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1496 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1497 | { | |
1498 | struct datapath *dp; | |
1499 | struct vport *vport; | |
1500 | ||
1501 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1502 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1503 | if (!vport) |
1504 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1505 | if (ovs_header->dp_ifindex && |
1506 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1507 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1508 | return vport; |
1509 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1510 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1511 | ||
1512 | if (port_no >= DP_MAX_PORTS) | |
1513 | return ERR_PTR(-EFBIG); | |
1514 | ||
46df7b81 | 1515 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1516 | if (!dp) |
1517 | return ERR_PTR(-ENODEV); | |
1518 | ||
8e4e1713 | 1519 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1520 | if (!vport) |
14408dba | 1521 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1522 | return vport; |
1523 | } else | |
1524 | return ERR_PTR(-EINVAL); | |
1525 | } | |
1526 | ||
1527 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
1528 | { | |
1529 | struct nlattr **a = info->attrs; | |
1530 | struct ovs_header *ovs_header = info->userhdr; | |
1531 | struct vport_parms parms; | |
1532 | struct sk_buff *reply; | |
1533 | struct vport *vport; | |
1534 | struct datapath *dp; | |
1535 | u32 port_no; | |
1536 | int err; | |
1537 | ||
1538 | err = -EINVAL; | |
1539 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || | |
1540 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
1541 | goto exit; | |
1542 | ||
8e4e1713 | 1543 | ovs_lock(); |
46df7b81 | 1544 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1545 | err = -ENODEV; |
1546 | if (!dp) | |
1547 | goto exit_unlock; | |
1548 | ||
1549 | if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1550 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1551 | ||
1552 | err = -EFBIG; | |
1553 | if (port_no >= DP_MAX_PORTS) | |
1554 | goto exit_unlock; | |
1555 | ||
8e4e1713 | 1556 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1557 | err = -EBUSY; |
1558 | if (vport) | |
1559 | goto exit_unlock; | |
1560 | } else { | |
1561 | for (port_no = 1; ; port_no++) { | |
1562 | if (port_no >= DP_MAX_PORTS) { | |
1563 | err = -EFBIG; | |
1564 | goto exit_unlock; | |
1565 | } | |
8e4e1713 | 1566 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1567 | if (!vport) |
1568 | break; | |
1569 | } | |
1570 | } | |
1571 | ||
1572 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
1573 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1574 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
1575 | parms.dp = dp; | |
1576 | parms.port_no = port_no; | |
15e47304 | 1577 | parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
ccb1352e JG |
1578 | |
1579 | vport = new_vport(&parms); | |
1580 | err = PTR_ERR(vport); | |
1581 | if (IS_ERR(vport)) | |
1582 | goto exit_unlock; | |
1583 | ||
cb7c5bdf | 1584 | err = 0; |
15e47304 | 1585 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, |
ccb1352e JG |
1586 | OVS_VPORT_CMD_NEW); |
1587 | if (IS_ERR(reply)) { | |
1588 | err = PTR_ERR(reply); | |
1589 | ovs_dp_detach_port(vport); | |
1590 | goto exit_unlock; | |
1591 | } | |
ed661185 | 1592 | |
2a94fe48 | 1593 | ovs_notify(&dp_vport_genl_family, reply, info); |
ccb1352e JG |
1594 | |
1595 | exit_unlock: | |
8e4e1713 | 1596 | ovs_unlock(); |
ccb1352e JG |
1597 | exit: |
1598 | return err; | |
1599 | } | |
1600 | ||
1601 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1602 | { | |
1603 | struct nlattr **a = info->attrs; | |
1604 | struct sk_buff *reply; | |
1605 | struct vport *vport; | |
1606 | int err; | |
1607 | ||
8e4e1713 | 1608 | ovs_lock(); |
46df7b81 | 1609 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1610 | err = PTR_ERR(vport); |
1611 | if (IS_ERR(vport)) | |
1612 | goto exit_unlock; | |
1613 | ||
ccb1352e | 1614 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 1615 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 1616 | err = -EINVAL; |
f44f3408 JG |
1617 | goto exit_unlock; |
1618 | } | |
ccb1352e | 1619 | |
a9341512 JG |
1620 | reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1621 | if (!reply) { | |
1622 | err = -ENOMEM; | |
1623 | goto exit_unlock; | |
1624 | } | |
1625 | ||
f44f3408 | 1626 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 1627 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 JG |
1628 | if (err) |
1629 | goto exit_free; | |
1630 | } | |
a9341512 | 1631 | |
03fbf8b3 | 1632 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) |
15e47304 | 1633 | vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
ccb1352e | 1634 | |
a9341512 JG |
1635 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1636 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1637 | BUG_ON(err < 0); | |
ccb1352e | 1638 | |
8e4e1713 | 1639 | ovs_unlock(); |
2a94fe48 | 1640 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 1641 | return 0; |
ccb1352e | 1642 | |
a9341512 JG |
1643 | exit_free: |
1644 | kfree_skb(reply); | |
ccb1352e | 1645 | exit_unlock: |
8e4e1713 | 1646 | ovs_unlock(); |
ccb1352e JG |
1647 | return err; |
1648 | } | |
1649 | ||
1650 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1651 | { | |
1652 | struct nlattr **a = info->attrs; | |
1653 | struct sk_buff *reply; | |
1654 | struct vport *vport; | |
1655 | int err; | |
1656 | ||
8e4e1713 | 1657 | ovs_lock(); |
46df7b81 | 1658 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1659 | err = PTR_ERR(vport); |
1660 | if (IS_ERR(vport)) | |
1661 | goto exit_unlock; | |
1662 | ||
1663 | if (vport->port_no == OVSP_LOCAL) { | |
1664 | err = -EINVAL; | |
1665 | goto exit_unlock; | |
1666 | } | |
1667 | ||
74f84a57 PS |
1668 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
1669 | info->snd_seq, OVS_VPORT_CMD_DEL); | |
ccb1352e JG |
1670 | err = PTR_ERR(reply); |
1671 | if (IS_ERR(reply)) | |
1672 | goto exit_unlock; | |
1673 | ||
734907e8 | 1674 | err = 0; |
ccb1352e JG |
1675 | ovs_dp_detach_port(vport); |
1676 | ||
2a94fe48 | 1677 | ovs_notify(&dp_vport_genl_family, reply, info); |
ccb1352e JG |
1678 | |
1679 | exit_unlock: | |
8e4e1713 | 1680 | ovs_unlock(); |
ccb1352e JG |
1681 | return err; |
1682 | } | |
1683 | ||
1684 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1685 | { | |
1686 | struct nlattr **a = info->attrs; | |
1687 | struct ovs_header *ovs_header = info->userhdr; | |
1688 | struct sk_buff *reply; | |
1689 | struct vport *vport; | |
1690 | int err; | |
1691 | ||
1692 | rcu_read_lock(); | |
46df7b81 | 1693 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
1694 | err = PTR_ERR(vport); |
1695 | if (IS_ERR(vport)) | |
1696 | goto exit_unlock; | |
1697 | ||
74f84a57 PS |
1698 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
1699 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
ccb1352e JG |
1700 | err = PTR_ERR(reply); |
1701 | if (IS_ERR(reply)) | |
1702 | goto exit_unlock; | |
1703 | ||
1704 | rcu_read_unlock(); | |
1705 | ||
1706 | return genlmsg_reply(reply, info); | |
1707 | ||
1708 | exit_unlock: | |
1709 | rcu_read_unlock(); | |
1710 | return err; | |
1711 | } | |
1712 | ||
1713 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1714 | { | |
1715 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
1716 | struct datapath *dp; | |
15eac2a7 PS |
1717 | int bucket = cb->args[0], skip = cb->args[1]; |
1718 | int i, j = 0; | |
ccb1352e | 1719 | |
46df7b81 | 1720 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1721 | if (!dp) |
1722 | return -ENODEV; | |
1723 | ||
1724 | rcu_read_lock(); | |
15eac2a7 | 1725 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 1726 | struct vport *vport; |
15eac2a7 PS |
1727 | |
1728 | j = 0; | |
b67bfe0d | 1729 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
1730 | if (j >= skip && |
1731 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 1732 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
1733 | cb->nlh->nlmsg_seq, |
1734 | NLM_F_MULTI, | |
1735 | OVS_VPORT_CMD_NEW) < 0) | |
1736 | goto out; | |
1737 | ||
1738 | j++; | |
1739 | } | |
1740 | skip = 0; | |
ccb1352e | 1741 | } |
15eac2a7 | 1742 | out: |
ccb1352e JG |
1743 | rcu_read_unlock(); |
1744 | ||
15eac2a7 PS |
1745 | cb->args[0] = i; |
1746 | cb->args[1] = j; | |
ccb1352e | 1747 | |
15eac2a7 | 1748 | return skb->len; |
ccb1352e JG |
1749 | } |
1750 | ||
4534de83 | 1751 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e JG |
1752 | { .cmd = OVS_VPORT_CMD_NEW, |
1753 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1754 | .policy = vport_policy, | |
1755 | .doit = ovs_vport_cmd_new | |
1756 | }, | |
1757 | { .cmd = OVS_VPORT_CMD_DEL, | |
1758 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1759 | .policy = vport_policy, | |
1760 | .doit = ovs_vport_cmd_del | |
1761 | }, | |
1762 | { .cmd = OVS_VPORT_CMD_GET, | |
1763 | .flags = 0, /* OK for unprivileged users. */ | |
1764 | .policy = vport_policy, | |
1765 | .doit = ovs_vport_cmd_get, | |
1766 | .dumpit = ovs_vport_cmd_dump | |
1767 | }, | |
1768 | { .cmd = OVS_VPORT_CMD_SET, | |
1769 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1770 | .policy = vport_policy, | |
1771 | .doit = ovs_vport_cmd_set, | |
1772 | }, | |
1773 | }; | |
1774 | ||
1775 | struct genl_family_and_ops { | |
1776 | struct genl_family *family; | |
4534de83 | 1777 | const struct genl_ops *ops; |
ccb1352e | 1778 | int n_ops; |
2a94fe48 | 1779 | const struct genl_multicast_group *group; |
ccb1352e JG |
1780 | }; |
1781 | ||
1782 | static const struct genl_family_and_ops dp_genl_families[] = { | |
1783 | { &dp_datapath_genl_family, | |
1784 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
1785 | &ovs_dp_datapath_multicast_group }, | |
1786 | { &dp_vport_genl_family, | |
1787 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
1788 | &ovs_dp_vport_multicast_group }, | |
1789 | { &dp_flow_genl_family, | |
1790 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
1791 | &ovs_dp_flow_multicast_group }, | |
1792 | { &dp_packet_genl_family, | |
1793 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
1794 | NULL }, | |
1795 | }; | |
1796 | ||
1797 | static void dp_unregister_genl(int n_families) | |
1798 | { | |
1799 | int i; | |
1800 | ||
1801 | for (i = 0; i < n_families; i++) | |
1802 | genl_unregister_family(dp_genl_families[i].family); | |
1803 | } | |
1804 | ||
1805 | static int dp_register_genl(void) | |
1806 | { | |
1807 | int n_registered; | |
1808 | int err; | |
1809 | int i; | |
1810 | ||
1811 | n_registered = 0; | |
1812 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
1813 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
1814 | ||
c53ed742 JB |
1815 | f->family->ops = f->ops; |
1816 | f->family->n_ops = f->n_ops; | |
2a94fe48 JB |
1817 | f->family->mcgrps = f->group; |
1818 | f->family->n_mcgrps = f->group ? 1 : 0; | |
c53ed742 | 1819 | err = genl_register_family(f->family); |
ccb1352e JG |
1820 | if (err) |
1821 | goto error; | |
1822 | n_registered++; | |
ccb1352e JG |
1823 | } |
1824 | ||
1825 | return 0; | |
1826 | ||
1827 | error: | |
1828 | dp_unregister_genl(n_registered); | |
1829 | return err; | |
1830 | } | |
1831 | ||
46df7b81 PS |
1832 | static int __net_init ovs_init_net(struct net *net) |
1833 | { | |
1834 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
1835 | ||
1836 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 1837 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
46df7b81 PS |
1838 | return 0; |
1839 | } | |
1840 | ||
1841 | static void __net_exit ovs_exit_net(struct net *net) | |
1842 | { | |
46df7b81 | 1843 | struct datapath *dp, *dp_next; |
8e4e1713 | 1844 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
46df7b81 | 1845 | |
8e4e1713 | 1846 | ovs_lock(); |
46df7b81 PS |
1847 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
1848 | __dp_destroy(dp); | |
8e4e1713 PS |
1849 | ovs_unlock(); |
1850 | ||
1851 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
1852 | } |
1853 | ||
1854 | static struct pernet_operations ovs_net_ops = { | |
1855 | .init = ovs_init_net, | |
1856 | .exit = ovs_exit_net, | |
1857 | .id = &ovs_net_id, | |
1858 | .size = sizeof(struct ovs_net), | |
1859 | }; | |
1860 | ||
ccb1352e JG |
1861 | static int __init dp_init(void) |
1862 | { | |
ccb1352e JG |
1863 | int err; |
1864 | ||
3523b29b | 1865 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
1866 | |
1867 | pr_info("Open vSwitch switching datapath\n"); | |
1868 | ||
1869 | err = ovs_flow_init(); | |
1870 | if (err) | |
1871 | goto error; | |
1872 | ||
1873 | err = ovs_vport_init(); | |
1874 | if (err) | |
1875 | goto error_flow_exit; | |
1876 | ||
46df7b81 | 1877 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
1878 | if (err) |
1879 | goto error_vport_exit; | |
1880 | ||
46df7b81 PS |
1881 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
1882 | if (err) | |
1883 | goto error_netns_exit; | |
1884 | ||
ccb1352e JG |
1885 | err = dp_register_genl(); |
1886 | if (err < 0) | |
1887 | goto error_unreg_notifier; | |
1888 | ||
ccb1352e JG |
1889 | return 0; |
1890 | ||
1891 | error_unreg_notifier: | |
1892 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
1893 | error_netns_exit: |
1894 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
1895 | error_vport_exit: |
1896 | ovs_vport_exit(); | |
1897 | error_flow_exit: | |
1898 | ovs_flow_exit(); | |
1899 | error: | |
1900 | return err; | |
1901 | } | |
1902 | ||
1903 | static void dp_cleanup(void) | |
1904 | { | |
ccb1352e JG |
1905 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
1906 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
1907 | unregister_pernet_device(&ovs_net_ops); |
1908 | rcu_barrier(); | |
ccb1352e JG |
1909 | ovs_vport_exit(); |
1910 | ovs_flow_exit(); | |
1911 | } | |
1912 | ||
1913 | module_init(dp_init); | |
1914 | module_exit(dp_cleanup); | |
1915 | ||
1916 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
1917 | MODULE_LICENSE("GPL"); |