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ccb1352e | 1 | /* |
caf2ee14 | 2 | * Copyright (c) 2007-2012 Nicira, Inc. |
ccb1352e JG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
20 | ||
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/if_arp.h> | |
24 | #include <linux/if_vlan.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
27 | #include <linux/jhash.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
31 | #include <linux/genetlink.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/kthread.h> | |
34 | #include <linux/mutex.h> | |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
ccb1352e JG |
39 | #include <linux/ethtool.h> |
40 | #include <linux/wait.h> | |
ccb1352e JG |
41 | #include <asm/div64.h> |
42 | #include <linux/highmem.h> | |
43 | #include <linux/netfilter_bridge.h> | |
44 | #include <linux/netfilter_ipv4.h> | |
45 | #include <linux/inetdevice.h> | |
46 | #include <linux/list.h> | |
8e4e1713 | 47 | #include <linux/lockdep.h> |
ccb1352e JG |
48 | #include <linux/openvswitch.h> |
49 | #include <linux/rculist.h> | |
50 | #include <linux/dmi.h> | |
51 | #include <linux/workqueue.h> | |
52 | #include <net/genetlink.h> | |
46df7b81 PS |
53 | #include <net/net_namespace.h> |
54 | #include <net/netns/generic.h> | |
ccb1352e JG |
55 | |
56 | #include "datapath.h" | |
57 | #include "flow.h" | |
58 | #include "vport-internal_dev.h" | |
cff63a52 | 59 | #include "vport-netdev.h" |
ccb1352e | 60 | |
46df7b81 PS |
61 | |
62 | #define REHASH_FLOW_INTERVAL (10 * 60 * HZ) | |
63 | static void rehash_flow_table(struct work_struct *work); | |
64 | static DECLARE_DELAYED_WORK(rehash_flow_wq, rehash_flow_table); | |
65 | ||
8e4e1713 PS |
66 | int ovs_net_id __read_mostly; |
67 | ||
ed661185 TG |
68 | static void ovs_notify(struct sk_buff *skb, struct genl_info *info, |
69 | struct genl_multicast_group *grp) | |
70 | { | |
71 | genl_notify(skb, genl_info_net(info), info->snd_portid, | |
72 | grp->id, info->nlhdr, GFP_KERNEL); | |
73 | } | |
74 | ||
ccb1352e JG |
75 | /** |
76 | * DOC: Locking: | |
77 | * | |
8e4e1713 PS |
78 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
79 | * operations on vports, etc.), Writes to other state (flow table | |
80 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
81 | * by ovs_lock. | |
ccb1352e JG |
82 | * |
83 | * Reads are protected by RCU. | |
84 | * | |
85 | * There are a few special cases (mostly stats) that have their own | |
86 | * synchronization but they nest under all of above and don't interact with | |
87 | * each other. | |
8e4e1713 PS |
88 | * |
89 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
90 | */ |
91 | ||
8e4e1713 PS |
92 | static DEFINE_MUTEX(ovs_mutex); |
93 | ||
94 | void ovs_lock(void) | |
95 | { | |
96 | mutex_lock(&ovs_mutex); | |
97 | } | |
98 | ||
99 | void ovs_unlock(void) | |
100 | { | |
101 | mutex_unlock(&ovs_mutex); | |
102 | } | |
103 | ||
104 | #ifdef CONFIG_LOCKDEP | |
105 | int lockdep_ovsl_is_held(void) | |
106 | { | |
107 | if (debug_locks) | |
108 | return lockdep_is_held(&ovs_mutex); | |
109 | else | |
110 | return 1; | |
111 | } | |
112 | #endif | |
113 | ||
ccb1352e | 114 | static struct vport *new_vport(const struct vport_parms *); |
46df7b81 | 115 | static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *, |
ccb1352e | 116 | const struct dp_upcall_info *); |
46df7b81 PS |
117 | static int queue_userspace_packet(struct net *, int dp_ifindex, |
118 | struct sk_buff *, | |
ccb1352e JG |
119 | const struct dp_upcall_info *); |
120 | ||
8e4e1713 | 121 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 122 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
ccb1352e JG |
123 | { |
124 | struct datapath *dp = NULL; | |
125 | struct net_device *dev; | |
126 | ||
127 | rcu_read_lock(); | |
46df7b81 | 128 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
ccb1352e JG |
129 | if (dev) { |
130 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
131 | if (vport) | |
132 | dp = vport->dp; | |
133 | } | |
134 | rcu_read_unlock(); | |
135 | ||
136 | return dp; | |
137 | } | |
138 | ||
8e4e1713 | 139 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
ccb1352e JG |
140 | const char *ovs_dp_name(const struct datapath *dp) |
141 | { | |
8e4e1713 | 142 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
ccb1352e JG |
143 | return vport->ops->get_name(vport); |
144 | } | |
145 | ||
146 | static int get_dpifindex(struct datapath *dp) | |
147 | { | |
148 | struct vport *local; | |
149 | int ifindex; | |
150 | ||
151 | rcu_read_lock(); | |
152 | ||
15eac2a7 | 153 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 154 | if (local) |
cff63a52 | 155 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
ccb1352e JG |
156 | else |
157 | ifindex = 0; | |
158 | ||
159 | rcu_read_unlock(); | |
160 | ||
161 | return ifindex; | |
162 | } | |
163 | ||
164 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
165 | { | |
166 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
167 | ||
168 | ovs_flow_tbl_destroy((__force struct flow_table *)dp->table); | |
169 | free_percpu(dp->stats_percpu); | |
46df7b81 | 170 | release_net(ovs_dp_get_net(dp)); |
15eac2a7 | 171 | kfree(dp->ports); |
ccb1352e JG |
172 | kfree(dp); |
173 | } | |
174 | ||
15eac2a7 PS |
175 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
176 | u16 port_no) | |
177 | { | |
178 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
179 | } | |
180 | ||
181 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) | |
182 | { | |
183 | struct vport *vport; | |
15eac2a7 PS |
184 | struct hlist_head *head; |
185 | ||
186 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 187 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
188 | if (vport->port_no == port_no) |
189 | return vport; | |
190 | } | |
191 | return NULL; | |
192 | } | |
193 | ||
8e4e1713 | 194 | /* Called with ovs_mutex. */ |
ccb1352e JG |
195 | static struct vport *new_vport(const struct vport_parms *parms) |
196 | { | |
197 | struct vport *vport; | |
198 | ||
199 | vport = ovs_vport_add(parms); | |
200 | if (!IS_ERR(vport)) { | |
201 | struct datapath *dp = parms->dp; | |
15eac2a7 | 202 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 203 | |
15eac2a7 | 204 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 205 | } |
ccb1352e JG |
206 | return vport; |
207 | } | |
208 | ||
ccb1352e JG |
209 | void ovs_dp_detach_port(struct vport *p) |
210 | { | |
8e4e1713 | 211 | ASSERT_OVSL(); |
ccb1352e JG |
212 | |
213 | /* First drop references to device. */ | |
15eac2a7 | 214 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
215 | |
216 | /* Then destroy it. */ | |
217 | ovs_vport_del(p); | |
218 | } | |
219 | ||
220 | /* Must be called with rcu_read_lock. */ | |
221 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) | |
222 | { | |
223 | struct datapath *dp = p->dp; | |
224 | struct sw_flow *flow; | |
225 | struct dp_stats_percpu *stats; | |
226 | struct sw_flow_key key; | |
227 | u64 *stats_counter; | |
228 | int error; | |
229 | int key_len; | |
230 | ||
404f2f10 | 231 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e JG |
232 | |
233 | /* Extract flow from 'skb' into 'key'. */ | |
234 | error = ovs_flow_extract(skb, p->port_no, &key, &key_len); | |
235 | if (unlikely(error)) { | |
236 | kfree_skb(skb); | |
237 | return; | |
238 | } | |
239 | ||
240 | /* Look up flow. */ | |
241 | flow = ovs_flow_tbl_lookup(rcu_dereference(dp->table), &key, key_len); | |
242 | if (unlikely(!flow)) { | |
243 | struct dp_upcall_info upcall; | |
244 | ||
245 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
246 | upcall.key = &key; | |
247 | upcall.userdata = NULL; | |
15e47304 | 248 | upcall.portid = p->upcall_portid; |
ccb1352e JG |
249 | ovs_dp_upcall(dp, skb, &upcall); |
250 | consume_skb(skb); | |
251 | stats_counter = &stats->n_missed; | |
252 | goto out; | |
253 | } | |
254 | ||
255 | OVS_CB(skb)->flow = flow; | |
256 | ||
257 | stats_counter = &stats->n_hit; | |
258 | ovs_flow_used(OVS_CB(skb)->flow, skb); | |
259 | ovs_execute_actions(dp, skb); | |
260 | ||
261 | out: | |
262 | /* Update datapath statistics. */ | |
263 | u64_stats_update_begin(&stats->sync); | |
264 | (*stats_counter)++; | |
265 | u64_stats_update_end(&stats->sync); | |
266 | } | |
267 | ||
268 | static struct genl_family dp_packet_genl_family = { | |
269 | .id = GENL_ID_GENERATE, | |
270 | .hdrsize = sizeof(struct ovs_header), | |
271 | .name = OVS_PACKET_FAMILY, | |
272 | .version = OVS_PACKET_VERSION, | |
46df7b81 | 273 | .maxattr = OVS_PACKET_ATTR_MAX, |
3a4e0d6a PS |
274 | .netnsok = true, |
275 | .parallel_ops = true, | |
ccb1352e JG |
276 | }; |
277 | ||
278 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, | |
46df7b81 | 279 | const struct dp_upcall_info *upcall_info) |
ccb1352e JG |
280 | { |
281 | struct dp_stats_percpu *stats; | |
282 | int dp_ifindex; | |
283 | int err; | |
284 | ||
15e47304 | 285 | if (upcall_info->portid == 0) { |
ccb1352e JG |
286 | err = -ENOTCONN; |
287 | goto err; | |
288 | } | |
289 | ||
290 | dp_ifindex = get_dpifindex(dp); | |
291 | if (!dp_ifindex) { | |
292 | err = -ENODEV; | |
293 | goto err; | |
294 | } | |
295 | ||
296 | if (!skb_is_gso(skb)) | |
46df7b81 | 297 | err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
ccb1352e | 298 | else |
46df7b81 | 299 | err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
ccb1352e JG |
300 | if (err) |
301 | goto err; | |
302 | ||
303 | return 0; | |
304 | ||
305 | err: | |
404f2f10 | 306 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e JG |
307 | |
308 | u64_stats_update_begin(&stats->sync); | |
309 | stats->n_lost++; | |
310 | u64_stats_update_end(&stats->sync); | |
311 | ||
312 | return err; | |
313 | } | |
314 | ||
46df7b81 PS |
315 | static int queue_gso_packets(struct net *net, int dp_ifindex, |
316 | struct sk_buff *skb, | |
ccb1352e JG |
317 | const struct dp_upcall_info *upcall_info) |
318 | { | |
a1b5d0dd | 319 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
ccb1352e JG |
320 | struct dp_upcall_info later_info; |
321 | struct sw_flow_key later_key; | |
322 | struct sk_buff *segs, *nskb; | |
323 | int err; | |
324 | ||
12b0004d | 325 | segs = __skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM, false); |
92e5dfc3 PS |
326 | if (IS_ERR(segs)) |
327 | return PTR_ERR(segs); | |
ccb1352e JG |
328 | |
329 | /* Queue all of the segments. */ | |
330 | skb = segs; | |
331 | do { | |
46df7b81 | 332 | err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info); |
ccb1352e JG |
333 | if (err) |
334 | break; | |
335 | ||
a1b5d0dd | 336 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
ccb1352e JG |
337 | /* The initial flow key extracted by ovs_flow_extract() |
338 | * in this case is for a first fragment, so we need to | |
339 | * properly mark later fragments. | |
340 | */ | |
341 | later_key = *upcall_info->key; | |
342 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
343 | ||
344 | later_info = *upcall_info; | |
345 | later_info.key = &later_key; | |
346 | upcall_info = &later_info; | |
347 | } | |
348 | } while ((skb = skb->next)); | |
349 | ||
350 | /* Free all of the segments. */ | |
351 | skb = segs; | |
352 | do { | |
353 | nskb = skb->next; | |
354 | if (err) | |
355 | kfree_skb(skb); | |
356 | else | |
357 | consume_skb(skb); | |
358 | } while ((skb = nskb)); | |
359 | return err; | |
360 | } | |
361 | ||
c3ff8cfe TG |
362 | static size_t key_attr_size(void) |
363 | { | |
364 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
7d5437c7 PS |
365 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ |
366 | + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
367 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
368 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
369 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
370 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
371 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
372 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
c3ff8cfe TG |
373 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ |
374 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
375 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
376 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
377 | + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */ | |
378 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
379 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
380 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
381 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
382 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
383 | } | |
384 | ||
385 | static size_t upcall_msg_size(const struct sk_buff *skb, | |
386 | const struct nlattr *userdata) | |
387 | { | |
388 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
389 | + nla_total_size(skb->len) /* OVS_PACKET_ATTR_PACKET */ | |
390 | + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */ | |
391 | ||
392 | /* OVS_PACKET_ATTR_USERDATA */ | |
393 | if (userdata) | |
394 | size += NLA_ALIGN(userdata->nla_len); | |
395 | ||
396 | return size; | |
397 | } | |
398 | ||
46df7b81 PS |
399 | static int queue_userspace_packet(struct net *net, int dp_ifindex, |
400 | struct sk_buff *skb, | |
ccb1352e JG |
401 | const struct dp_upcall_info *upcall_info) |
402 | { | |
403 | struct ovs_header *upcall; | |
404 | struct sk_buff *nskb = NULL; | |
405 | struct sk_buff *user_skb; /* to be queued to userspace */ | |
406 | struct nlattr *nla; | |
ccb1352e JG |
407 | int err; |
408 | ||
409 | if (vlan_tx_tag_present(skb)) { | |
410 | nskb = skb_clone(skb, GFP_ATOMIC); | |
411 | if (!nskb) | |
412 | return -ENOMEM; | |
413 | ||
86a9bad3 | 414 | nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb)); |
8aa51d64 | 415 | if (!nskb) |
ccb1352e JG |
416 | return -ENOMEM; |
417 | ||
418 | nskb->vlan_tci = 0; | |
419 | skb = nskb; | |
420 | } | |
421 | ||
422 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
423 | err = -EFBIG; | |
424 | goto out; | |
425 | } | |
426 | ||
c3ff8cfe | 427 | user_skb = genlmsg_new(upcall_msg_size(skb, upcall_info->userdata), GFP_ATOMIC); |
ccb1352e JG |
428 | if (!user_skb) { |
429 | err = -ENOMEM; | |
430 | goto out; | |
431 | } | |
432 | ||
433 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
434 | 0, upcall_info->cmd); | |
435 | upcall->dp_ifindex = dp_ifindex; | |
436 | ||
437 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
438 | ovs_flow_to_nlattrs(upcall_info->key, user_skb); | |
439 | nla_nest_end(user_skb, nla); | |
440 | ||
441 | if (upcall_info->userdata) | |
4490108b BP |
442 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
443 | nla_len(upcall_info->userdata), | |
444 | nla_data(upcall_info->userdata)); | |
ccb1352e JG |
445 | |
446 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); | |
447 | ||
448 | skb_copy_and_csum_dev(skb, nla_data(nla)); | |
449 | ||
a15ff76c | 450 | genlmsg_end(user_skb, upcall); |
15e47304 | 451 | err = genlmsg_unicast(net, user_skb, upcall_info->portid); |
ccb1352e JG |
452 | |
453 | out: | |
454 | kfree_skb(nskb); | |
455 | return err; | |
456 | } | |
457 | ||
8e4e1713 | 458 | /* Called with ovs_mutex. */ |
46df7b81 | 459 | static int flush_flows(struct datapath *dp) |
ccb1352e JG |
460 | { |
461 | struct flow_table *old_table; | |
462 | struct flow_table *new_table; | |
ccb1352e | 463 | |
8e4e1713 | 464 | old_table = ovsl_dereference(dp->table); |
ccb1352e JG |
465 | new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS); |
466 | if (!new_table) | |
467 | return -ENOMEM; | |
468 | ||
469 | rcu_assign_pointer(dp->table, new_table); | |
470 | ||
471 | ovs_flow_tbl_deferred_destroy(old_table); | |
472 | return 0; | |
473 | } | |
474 | ||
74f84a57 PS |
475 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, int attr_len) |
476 | { | |
477 | ||
478 | struct sw_flow_actions *acts; | |
479 | int new_acts_size; | |
480 | int req_size = NLA_ALIGN(attr_len); | |
481 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
482 | (*sfa)->actions_len; | |
483 | ||
484 | if (req_size <= (ksize(*sfa) - next_offset)) | |
485 | goto out; | |
486 | ||
487 | new_acts_size = ksize(*sfa) * 2; | |
488 | ||
489 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
490 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
491 | return ERR_PTR(-EMSGSIZE); | |
492 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
493 | } | |
494 | ||
495 | acts = ovs_flow_actions_alloc(new_acts_size); | |
496 | if (IS_ERR(acts)) | |
497 | return (void *)acts; | |
498 | ||
499 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
500 | acts->actions_len = (*sfa)->actions_len; | |
501 | kfree(*sfa); | |
502 | *sfa = acts; | |
503 | ||
504 | out: | |
505 | (*sfa)->actions_len += req_size; | |
506 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
507 | } | |
508 | ||
509 | static int add_action(struct sw_flow_actions **sfa, int attrtype, void *data, int len) | |
510 | { | |
511 | struct nlattr *a; | |
512 | ||
513 | a = reserve_sfa_size(sfa, nla_attr_size(len)); | |
514 | if (IS_ERR(a)) | |
515 | return PTR_ERR(a); | |
516 | ||
517 | a->nla_type = attrtype; | |
518 | a->nla_len = nla_attr_size(len); | |
519 | ||
520 | if (data) | |
521 | memcpy(nla_data(a), data, len); | |
522 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
527 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, int attrtype) | |
528 | { | |
529 | int used = (*sfa)->actions_len; | |
530 | int err; | |
531 | ||
532 | err = add_action(sfa, attrtype, NULL, 0); | |
533 | if (err) | |
534 | return err; | |
535 | ||
536 | return used; | |
537 | } | |
538 | ||
539 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, int st_offset) | |
540 | { | |
541 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + st_offset); | |
542 | ||
543 | a->nla_len = sfa->actions_len - st_offset; | |
544 | } | |
545 | ||
546 | static int validate_and_copy_actions(const struct nlattr *attr, | |
547 | const struct sw_flow_key *key, int depth, | |
548 | struct sw_flow_actions **sfa); | |
ccb1352e | 549 | |
74f84a57 PS |
550 | static int validate_and_copy_sample(const struct nlattr *attr, |
551 | const struct sw_flow_key *key, int depth, | |
552 | struct sw_flow_actions **sfa) | |
ccb1352e JG |
553 | { |
554 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; | |
555 | const struct nlattr *probability, *actions; | |
556 | const struct nlattr *a; | |
74f84a57 | 557 | int rem, start, err, st_acts; |
ccb1352e JG |
558 | |
559 | memset(attrs, 0, sizeof(attrs)); | |
560 | nla_for_each_nested(a, attr, rem) { | |
561 | int type = nla_type(a); | |
562 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
563 | return -EINVAL; | |
564 | attrs[type] = a; | |
565 | } | |
566 | if (rem) | |
567 | return -EINVAL; | |
568 | ||
569 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
570 | if (!probability || nla_len(probability) != sizeof(u32)) | |
571 | return -EINVAL; | |
572 | ||
573 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; | |
574 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
575 | return -EINVAL; | |
74f84a57 PS |
576 | |
577 | /* validation done, copy sample action. */ | |
578 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE); | |
579 | if (start < 0) | |
580 | return start; | |
581 | err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, nla_data(probability), sizeof(u32)); | |
582 | if (err) | |
583 | return err; | |
584 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS); | |
585 | if (st_acts < 0) | |
586 | return st_acts; | |
587 | ||
588 | err = validate_and_copy_actions(actions, key, depth + 1, sfa); | |
589 | if (err) | |
590 | return err; | |
591 | ||
592 | add_nested_action_end(*sfa, st_acts); | |
593 | add_nested_action_end(*sfa, start); | |
594 | ||
595 | return 0; | |
ccb1352e JG |
596 | } |
597 | ||
072ae631 PS |
598 | static int validate_tp_port(const struct sw_flow_key *flow_key) |
599 | { | |
600 | if (flow_key->eth.type == htons(ETH_P_IP)) { | |
4185392d | 601 | if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst) |
072ae631 PS |
602 | return 0; |
603 | } else if (flow_key->eth.type == htons(ETH_P_IPV6)) { | |
4185392d | 604 | if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst) |
072ae631 PS |
605 | return 0; |
606 | } | |
607 | ||
608 | return -EINVAL; | |
609 | } | |
610 | ||
7d5437c7 PS |
611 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
612 | struct sw_flow_actions **sfa) | |
613 | { | |
614 | struct ovs_key_ipv4_tunnel tun_key; | |
615 | int err, start; | |
616 | ||
617 | err = ovs_ipv4_tun_from_nlattr(nla_data(attr), &tun_key); | |
618 | if (err) | |
619 | return err; | |
620 | ||
621 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET); | |
622 | if (start < 0) | |
623 | return start; | |
624 | ||
625 | err = add_action(sfa, OVS_KEY_ATTR_IPV4_TUNNEL, &tun_key, sizeof(tun_key)); | |
626 | add_nested_action_end(*sfa, start); | |
627 | ||
628 | return err; | |
629 | } | |
630 | ||
ccb1352e | 631 | static int validate_set(const struct nlattr *a, |
7d5437c7 PS |
632 | const struct sw_flow_key *flow_key, |
633 | struct sw_flow_actions **sfa, | |
634 | bool *set_tun) | |
ccb1352e JG |
635 | { |
636 | const struct nlattr *ovs_key = nla_data(a); | |
637 | int key_type = nla_type(ovs_key); | |
638 | ||
639 | /* There can be only one key in a action */ | |
640 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
641 | return -EINVAL; | |
642 | ||
643 | if (key_type > OVS_KEY_ATTR_MAX || | |
7d5437c7 PS |
644 | (ovs_key_lens[key_type] != nla_len(ovs_key) && |
645 | ovs_key_lens[key_type] != -1)) | |
ccb1352e JG |
646 | return -EINVAL; |
647 | ||
648 | switch (key_type) { | |
649 | const struct ovs_key_ipv4 *ipv4_key; | |
3fdbd1ce | 650 | const struct ovs_key_ipv6 *ipv6_key; |
7d5437c7 | 651 | int err; |
ccb1352e JG |
652 | |
653 | case OVS_KEY_ATTR_PRIORITY: | |
39c7caeb | 654 | case OVS_KEY_ATTR_SKB_MARK: |
ccb1352e JG |
655 | case OVS_KEY_ATTR_ETHERNET: |
656 | break; | |
657 | ||
7d5437c7 PS |
658 | case OVS_KEY_ATTR_TUNNEL: |
659 | *set_tun = true; | |
660 | err = validate_and_copy_set_tun(a, sfa); | |
661 | if (err) | |
662 | return err; | |
663 | break; | |
664 | ||
ccb1352e JG |
665 | case OVS_KEY_ATTR_IPV4: |
666 | if (flow_key->eth.type != htons(ETH_P_IP)) | |
667 | return -EINVAL; | |
668 | ||
4185392d | 669 | if (!flow_key->ip.proto) |
ccb1352e JG |
670 | return -EINVAL; |
671 | ||
672 | ipv4_key = nla_data(ovs_key); | |
673 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
674 | return -EINVAL; | |
675 | ||
676 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) | |
677 | return -EINVAL; | |
678 | ||
679 | break; | |
680 | ||
3fdbd1ce AA |
681 | case OVS_KEY_ATTR_IPV6: |
682 | if (flow_key->eth.type != htons(ETH_P_IPV6)) | |
683 | return -EINVAL; | |
684 | ||
685 | if (!flow_key->ip.proto) | |
686 | return -EINVAL; | |
687 | ||
688 | ipv6_key = nla_data(ovs_key); | |
689 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
690 | return -EINVAL; | |
691 | ||
692 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) | |
693 | return -EINVAL; | |
694 | ||
695 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) | |
696 | return -EINVAL; | |
697 | ||
698 | break; | |
699 | ||
ccb1352e JG |
700 | case OVS_KEY_ATTR_TCP: |
701 | if (flow_key->ip.proto != IPPROTO_TCP) | |
702 | return -EINVAL; | |
703 | ||
072ae631 | 704 | return validate_tp_port(flow_key); |
ccb1352e JG |
705 | |
706 | case OVS_KEY_ATTR_UDP: | |
707 | if (flow_key->ip.proto != IPPROTO_UDP) | |
708 | return -EINVAL; | |
709 | ||
072ae631 | 710 | return validate_tp_port(flow_key); |
ccb1352e JG |
711 | |
712 | default: | |
713 | return -EINVAL; | |
714 | } | |
715 | ||
716 | return 0; | |
717 | } | |
718 | ||
719 | static int validate_userspace(const struct nlattr *attr) | |
720 | { | |
721 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { | |
722 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, | |
4490108b | 723 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, |
ccb1352e JG |
724 | }; |
725 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
726 | int error; | |
727 | ||
728 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, | |
729 | attr, userspace_policy); | |
730 | if (error) | |
731 | return error; | |
732 | ||
733 | if (!a[OVS_USERSPACE_ATTR_PID] || | |
734 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
735 | return -EINVAL; | |
736 | ||
737 | return 0; | |
738 | } | |
739 | ||
74f84a57 PS |
740 | static int copy_action(const struct nlattr *from, |
741 | struct sw_flow_actions **sfa) | |
742 | { | |
743 | int totlen = NLA_ALIGN(from->nla_len); | |
744 | struct nlattr *to; | |
745 | ||
746 | to = reserve_sfa_size(sfa, from->nla_len); | |
747 | if (IS_ERR(to)) | |
748 | return PTR_ERR(to); | |
749 | ||
750 | memcpy(to, from, totlen); | |
751 | return 0; | |
752 | } | |
753 | ||
754 | static int validate_and_copy_actions(const struct nlattr *attr, | |
755 | const struct sw_flow_key *key, | |
756 | int depth, | |
757 | struct sw_flow_actions **sfa) | |
ccb1352e JG |
758 | { |
759 | const struct nlattr *a; | |
760 | int rem, err; | |
761 | ||
762 | if (depth >= SAMPLE_ACTION_DEPTH) | |
763 | return -EOVERFLOW; | |
764 | ||
765 | nla_for_each_nested(a, attr, rem) { | |
766 | /* Expected argument lengths, (u32)-1 for variable length. */ | |
767 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { | |
768 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), | |
769 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, | |
770 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), | |
771 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
772 | [OVS_ACTION_ATTR_SET] = (u32)-1, | |
773 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1 | |
774 | }; | |
775 | const struct ovs_action_push_vlan *vlan; | |
776 | int type = nla_type(a); | |
74f84a57 | 777 | bool skip_copy; |
ccb1352e JG |
778 | |
779 | if (type > OVS_ACTION_ATTR_MAX || | |
780 | (action_lens[type] != nla_len(a) && | |
781 | action_lens[type] != (u32)-1)) | |
782 | return -EINVAL; | |
783 | ||
74f84a57 | 784 | skip_copy = false; |
ccb1352e JG |
785 | switch (type) { |
786 | case OVS_ACTION_ATTR_UNSPEC: | |
787 | return -EINVAL; | |
788 | ||
789 | case OVS_ACTION_ATTR_USERSPACE: | |
790 | err = validate_userspace(a); | |
791 | if (err) | |
792 | return err; | |
793 | break; | |
794 | ||
795 | case OVS_ACTION_ATTR_OUTPUT: | |
796 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
797 | return -EINVAL; | |
798 | break; | |
799 | ||
800 | ||
801 | case OVS_ACTION_ATTR_POP_VLAN: | |
802 | break; | |
803 | ||
804 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
805 | vlan = nla_data(a); | |
806 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
807 | return -EINVAL; | |
808 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) | |
809 | return -EINVAL; | |
810 | break; | |
811 | ||
812 | case OVS_ACTION_ATTR_SET: | |
7d5437c7 | 813 | err = validate_set(a, key, sfa, &skip_copy); |
ccb1352e JG |
814 | if (err) |
815 | return err; | |
816 | break; | |
817 | ||
818 | case OVS_ACTION_ATTR_SAMPLE: | |
74f84a57 | 819 | err = validate_and_copy_sample(a, key, depth, sfa); |
ccb1352e JG |
820 | if (err) |
821 | return err; | |
74f84a57 | 822 | skip_copy = true; |
ccb1352e JG |
823 | break; |
824 | ||
825 | default: | |
826 | return -EINVAL; | |
827 | } | |
74f84a57 PS |
828 | if (!skip_copy) { |
829 | err = copy_action(a, sfa); | |
830 | if (err) | |
831 | return err; | |
832 | } | |
ccb1352e JG |
833 | } |
834 | ||
835 | if (rem > 0) | |
836 | return -EINVAL; | |
837 | ||
838 | return 0; | |
839 | } | |
840 | ||
841 | static void clear_stats(struct sw_flow *flow) | |
842 | { | |
843 | flow->used = 0; | |
844 | flow->tcp_flags = 0; | |
845 | flow->packet_count = 0; | |
846 | flow->byte_count = 0; | |
847 | } | |
848 | ||
849 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) | |
850 | { | |
851 | struct ovs_header *ovs_header = info->userhdr; | |
852 | struct nlattr **a = info->attrs; | |
853 | struct sw_flow_actions *acts; | |
854 | struct sk_buff *packet; | |
855 | struct sw_flow *flow; | |
856 | struct datapath *dp; | |
857 | struct ethhdr *eth; | |
858 | int len; | |
859 | int err; | |
860 | int key_len; | |
861 | ||
862 | err = -EINVAL; | |
863 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 864 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
865 | goto err; |
866 | ||
867 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
868 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
869 | err = -ENOMEM; | |
870 | if (!packet) | |
871 | goto err; | |
872 | skb_reserve(packet, NET_IP_ALIGN); | |
873 | ||
32686a9d | 874 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e JG |
875 | |
876 | skb_reset_mac_header(packet); | |
877 | eth = eth_hdr(packet); | |
878 | ||
879 | /* Normally, setting the skb 'protocol' field would be handled by a | |
880 | * call to eth_type_trans(), but it assumes there's a sending | |
881 | * device, which we may not have. */ | |
e5c5d22e | 882 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
883 | packet->protocol = eth->h_proto; |
884 | else | |
885 | packet->protocol = htons(ETH_P_802_2); | |
886 | ||
887 | /* Build an sw_flow for sending this packet. */ | |
888 | flow = ovs_flow_alloc(); | |
889 | err = PTR_ERR(flow); | |
890 | if (IS_ERR(flow)) | |
891 | goto err_kfree_skb; | |
892 | ||
893 | err = ovs_flow_extract(packet, -1, &flow->key, &key_len); | |
894 | if (err) | |
895 | goto err_flow_free; | |
896 | ||
a3e82996 | 897 | err = ovs_flow_metadata_from_nlattrs(flow, key_len, a[OVS_PACKET_ATTR_KEY]); |
ccb1352e JG |
898 | if (err) |
899 | goto err_flow_free; | |
74f84a57 | 900 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
ccb1352e JG |
901 | err = PTR_ERR(acts); |
902 | if (IS_ERR(acts)) | |
903 | goto err_flow_free; | |
74f84a57 PS |
904 | |
905 | err = validate_and_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0, &acts); | |
ccb1352e | 906 | rcu_assign_pointer(flow->sf_acts, acts); |
74f84a57 PS |
907 | if (err) |
908 | goto err_flow_free; | |
ccb1352e JG |
909 | |
910 | OVS_CB(packet)->flow = flow; | |
911 | packet->priority = flow->key.phy.priority; | |
39c7caeb | 912 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
913 | |
914 | rcu_read_lock(); | |
46df7b81 | 915 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
916 | err = -ENODEV; |
917 | if (!dp) | |
918 | goto err_unlock; | |
919 | ||
920 | local_bh_disable(); | |
921 | err = ovs_execute_actions(dp, packet); | |
922 | local_bh_enable(); | |
923 | rcu_read_unlock(); | |
924 | ||
925 | ovs_flow_free(flow); | |
926 | return err; | |
927 | ||
928 | err_unlock: | |
929 | rcu_read_unlock(); | |
930 | err_flow_free: | |
931 | ovs_flow_free(flow); | |
932 | err_kfree_skb: | |
933 | kfree_skb(packet); | |
934 | err: | |
935 | return err; | |
936 | } | |
937 | ||
938 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 939 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
940 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
941 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
942 | }; | |
943 | ||
944 | static struct genl_ops dp_packet_genl_ops[] = { | |
945 | { .cmd = OVS_PACKET_CMD_EXECUTE, | |
946 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
947 | .policy = packet_policy, | |
948 | .doit = ovs_packet_cmd_execute | |
949 | } | |
950 | }; | |
951 | ||
952 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) | |
953 | { | |
59a35d60 | 954 | struct flow_table *table; |
ccb1352e | 955 | int i; |
ccb1352e | 956 | |
59a35d60 | 957 | table = rcu_dereference_check(dp->table, lockdep_ovsl_is_held()); |
ccb1352e JG |
958 | stats->n_flows = ovs_flow_tbl_count(table); |
959 | ||
960 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
961 | for_each_possible_cpu(i) { | |
962 | const struct dp_stats_percpu *percpu_stats; | |
963 | struct dp_stats_percpu local_stats; | |
964 | unsigned int start; | |
965 | ||
966 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
967 | ||
968 | do { | |
969 | start = u64_stats_fetch_begin_bh(&percpu_stats->sync); | |
970 | local_stats = *percpu_stats; | |
971 | } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); | |
972 | ||
973 | stats->n_hit += local_stats.n_hit; | |
974 | stats->n_missed += local_stats.n_missed; | |
975 | stats->n_lost += local_stats.n_lost; | |
976 | } | |
977 | } | |
978 | ||
979 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { | |
980 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
981 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
983 | }; | |
984 | ||
985 | static struct genl_family dp_flow_genl_family = { | |
986 | .id = GENL_ID_GENERATE, | |
987 | .hdrsize = sizeof(struct ovs_header), | |
988 | .name = OVS_FLOW_FAMILY, | |
989 | .version = OVS_FLOW_VERSION, | |
46df7b81 | 990 | .maxattr = OVS_FLOW_ATTR_MAX, |
3a4e0d6a PS |
991 | .netnsok = true, |
992 | .parallel_ops = true, | |
ccb1352e JG |
993 | }; |
994 | ||
995 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { | |
996 | .name = OVS_FLOW_MCGROUP | |
997 | }; | |
998 | ||
74f84a57 PS |
999 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb); |
1000 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) | |
1001 | { | |
1002 | const struct nlattr *a; | |
1003 | struct nlattr *start; | |
1004 | int err = 0, rem; | |
1005 | ||
1006 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
1007 | if (!start) | |
1008 | return -EMSGSIZE; | |
1009 | ||
1010 | nla_for_each_nested(a, attr, rem) { | |
1011 | int type = nla_type(a); | |
1012 | struct nlattr *st_sample; | |
1013 | ||
1014 | switch (type) { | |
1015 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
1016 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, sizeof(u32), nla_data(a))) | |
1017 | return -EMSGSIZE; | |
1018 | break; | |
1019 | case OVS_SAMPLE_ATTR_ACTIONS: | |
1020 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
1021 | if (!st_sample) | |
1022 | return -EMSGSIZE; | |
1023 | err = actions_to_attr(nla_data(a), nla_len(a), skb); | |
1024 | if (err) | |
1025 | return err; | |
1026 | nla_nest_end(skb, st_sample); | |
1027 | break; | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | nla_nest_end(skb, start); | |
1032 | return err; | |
1033 | } | |
1034 | ||
7d5437c7 PS |
1035 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) |
1036 | { | |
1037 | const struct nlattr *ovs_key = nla_data(a); | |
1038 | int key_type = nla_type(ovs_key); | |
1039 | struct nlattr *start; | |
1040 | int err; | |
1041 | ||
1042 | switch (key_type) { | |
1043 | case OVS_KEY_ATTR_IPV4_TUNNEL: | |
1044 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); | |
1045 | if (!start) | |
1046 | return -EMSGSIZE; | |
1047 | ||
1048 | err = ovs_ipv4_tun_to_nlattr(skb, nla_data(ovs_key)); | |
1049 | if (err) | |
1050 | return err; | |
1051 | nla_nest_end(skb, start); | |
1052 | break; | |
1053 | default: | |
1054 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
1055 | return -EMSGSIZE; | |
1056 | break; | |
1057 | } | |
1058 | ||
1059 | return 0; | |
1060 | } | |
1061 | ||
74f84a57 PS |
1062 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb) |
1063 | { | |
1064 | const struct nlattr *a; | |
1065 | int rem, err; | |
1066 | ||
1067 | nla_for_each_attr(a, attr, len, rem) { | |
1068 | int type = nla_type(a); | |
1069 | ||
1070 | switch (type) { | |
7d5437c7 PS |
1071 | case OVS_ACTION_ATTR_SET: |
1072 | err = set_action_to_attr(a, skb); | |
1073 | if (err) | |
1074 | return err; | |
1075 | break; | |
1076 | ||
74f84a57 PS |
1077 | case OVS_ACTION_ATTR_SAMPLE: |
1078 | err = sample_action_to_attr(a, skb); | |
1079 | if (err) | |
1080 | return err; | |
1081 | break; | |
1082 | default: | |
1083 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
1084 | return -EMSGSIZE; | |
1085 | break; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | return 0; | |
1090 | } | |
1091 | ||
c3ff8cfe TG |
1092 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
1093 | { | |
1094 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
1095 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
1096 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ | |
1097 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
1098 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
1099 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
1100 | } | |
1101 | ||
8e4e1713 | 1102 | /* Called with ovs_mutex. */ |
ccb1352e | 1103 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
15e47304 | 1104 | struct sk_buff *skb, u32 portid, |
ccb1352e JG |
1105 | u32 seq, u32 flags, u8 cmd) |
1106 | { | |
1107 | const int skb_orig_len = skb->len; | |
74f84a57 | 1108 | struct nlattr *start; |
ccb1352e JG |
1109 | struct ovs_flow_stats stats; |
1110 | struct ovs_header *ovs_header; | |
1111 | struct nlattr *nla; | |
1112 | unsigned long used; | |
1113 | u8 tcp_flags; | |
1114 | int err; | |
1115 | ||
15e47304 | 1116 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
ccb1352e JG |
1117 | if (!ovs_header) |
1118 | return -EMSGSIZE; | |
1119 | ||
1120 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1121 | ||
1122 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); | |
1123 | if (!nla) | |
1124 | goto nla_put_failure; | |
1125 | err = ovs_flow_to_nlattrs(&flow->key, skb); | |
1126 | if (err) | |
1127 | goto error; | |
1128 | nla_nest_end(skb, nla); | |
1129 | ||
1130 | spin_lock_bh(&flow->lock); | |
1131 | used = flow->used; | |
1132 | stats.n_packets = flow->packet_count; | |
1133 | stats.n_bytes = flow->byte_count; | |
1134 | tcp_flags = flow->tcp_flags; | |
1135 | spin_unlock_bh(&flow->lock); | |
1136 | ||
028d6a67 DM |
1137 | if (used && |
1138 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
1139 | goto nla_put_failure; | |
ccb1352e | 1140 | |
028d6a67 DM |
1141 | if (stats.n_packets && |
1142 | nla_put(skb, OVS_FLOW_ATTR_STATS, | |
1143 | sizeof(struct ovs_flow_stats), &stats)) | |
1144 | goto nla_put_failure; | |
ccb1352e | 1145 | |
028d6a67 DM |
1146 | if (tcp_flags && |
1147 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags)) | |
1148 | goto nla_put_failure; | |
ccb1352e JG |
1149 | |
1150 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
1151 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
1152 | * Netlink but individual action lists can be longer than | |
1153 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
1154 | * The userspace caller can always fetch the actions separately if it | |
1155 | * really wants them. (Most userspace callers in fact don't care.) | |
1156 | * | |
1157 | * This can only fail for dump operations because the skb is always | |
1158 | * properly sized for single flows. | |
1159 | */ | |
74f84a57 PS |
1160 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
1161 | if (start) { | |
d57170b1 PS |
1162 | const struct sw_flow_actions *sf_acts; |
1163 | ||
1164 | sf_acts = rcu_dereference_check(flow->sf_acts, | |
1165 | lockdep_ovsl_is_held()); | |
1166 | ||
74f84a57 PS |
1167 | err = actions_to_attr(sf_acts->actions, sf_acts->actions_len, skb); |
1168 | if (!err) | |
1169 | nla_nest_end(skb, start); | |
1170 | else { | |
1171 | if (skb_orig_len) | |
1172 | goto error; | |
1173 | ||
1174 | nla_nest_cancel(skb, start); | |
1175 | } | |
1176 | } else if (skb_orig_len) | |
1177 | goto nla_put_failure; | |
ccb1352e JG |
1178 | |
1179 | return genlmsg_end(skb, ovs_header); | |
1180 | ||
1181 | nla_put_failure: | |
1182 | err = -EMSGSIZE; | |
1183 | error: | |
1184 | genlmsg_cancel(skb, ovs_header); | |
1185 | return err; | |
1186 | } | |
1187 | ||
1188 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) | |
1189 | { | |
1190 | const struct sw_flow_actions *sf_acts; | |
ccb1352e | 1191 | |
8e4e1713 | 1192 | sf_acts = ovsl_dereference(flow->sf_acts); |
ccb1352e | 1193 | |
c3ff8cfe | 1194 | return genlmsg_new(ovs_flow_cmd_msg_size(sf_acts), GFP_KERNEL); |
ccb1352e JG |
1195 | } |
1196 | ||
1197 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, | |
1198 | struct datapath *dp, | |
15e47304 | 1199 | u32 portid, u32 seq, u8 cmd) |
ccb1352e JG |
1200 | { |
1201 | struct sk_buff *skb; | |
1202 | int retval; | |
1203 | ||
1204 | skb = ovs_flow_cmd_alloc_info(flow); | |
1205 | if (!skb) | |
1206 | return ERR_PTR(-ENOMEM); | |
1207 | ||
15e47304 | 1208 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, portid, seq, 0, cmd); |
ccb1352e JG |
1209 | BUG_ON(retval < 0); |
1210 | return skb; | |
1211 | } | |
1212 | ||
1213 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) | |
1214 | { | |
1215 | struct nlattr **a = info->attrs; | |
1216 | struct ovs_header *ovs_header = info->userhdr; | |
1217 | struct sw_flow_key key; | |
1218 | struct sw_flow *flow; | |
1219 | struct sk_buff *reply; | |
1220 | struct datapath *dp; | |
1221 | struct flow_table *table; | |
74f84a57 | 1222 | struct sw_flow_actions *acts = NULL; |
ccb1352e JG |
1223 | int error; |
1224 | int key_len; | |
1225 | ||
1226 | /* Extract key. */ | |
1227 | error = -EINVAL; | |
1228 | if (!a[OVS_FLOW_ATTR_KEY]) | |
1229 | goto error; | |
1230 | error = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); | |
1231 | if (error) | |
1232 | goto error; | |
1233 | ||
1234 | /* Validate actions. */ | |
1235 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
74f84a57 PS |
1236 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
1237 | error = PTR_ERR(acts); | |
1238 | if (IS_ERR(acts)) | |
ccb1352e | 1239 | goto error; |
74f84a57 PS |
1240 | |
1241 | error = validate_and_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0, &acts); | |
1242 | if (error) | |
1243 | goto err_kfree; | |
ccb1352e JG |
1244 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
1245 | error = -EINVAL; | |
1246 | goto error; | |
1247 | } | |
1248 | ||
8e4e1713 | 1249 | ovs_lock(); |
46df7b81 | 1250 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1251 | error = -ENODEV; |
1252 | if (!dp) | |
8e4e1713 | 1253 | goto err_unlock_ovs; |
ccb1352e | 1254 | |
8e4e1713 | 1255 | table = ovsl_dereference(dp->table); |
ccb1352e JG |
1256 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
1257 | if (!flow) { | |
ccb1352e JG |
1258 | /* Bail out if we're not allowed to create a new flow. */ |
1259 | error = -ENOENT; | |
1260 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) | |
8e4e1713 | 1261 | goto err_unlock_ovs; |
ccb1352e JG |
1262 | |
1263 | /* Expand table, if necessary, to make room. */ | |
1264 | if (ovs_flow_tbl_need_to_expand(table)) { | |
1265 | struct flow_table *new_table; | |
1266 | ||
1267 | new_table = ovs_flow_tbl_expand(table); | |
1268 | if (!IS_ERR(new_table)) { | |
1269 | rcu_assign_pointer(dp->table, new_table); | |
1270 | ovs_flow_tbl_deferred_destroy(table); | |
8e4e1713 | 1271 | table = ovsl_dereference(dp->table); |
ccb1352e JG |
1272 | } |
1273 | } | |
1274 | ||
1275 | /* Allocate flow. */ | |
1276 | flow = ovs_flow_alloc(); | |
1277 | if (IS_ERR(flow)) { | |
1278 | error = PTR_ERR(flow); | |
8e4e1713 | 1279 | goto err_unlock_ovs; |
ccb1352e | 1280 | } |
ccb1352e JG |
1281 | clear_stats(flow); |
1282 | ||
ccb1352e JG |
1283 | rcu_assign_pointer(flow->sf_acts, acts); |
1284 | ||
1285 | /* Put flow in bucket. */ | |
a3e82996 | 1286 | ovs_flow_tbl_insert(table, flow, &key, key_len); |
ccb1352e | 1287 | |
15e47304 | 1288 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
ccb1352e JG |
1289 | info->snd_seq, |
1290 | OVS_FLOW_CMD_NEW); | |
1291 | } else { | |
1292 | /* We found a matching flow. */ | |
1293 | struct sw_flow_actions *old_acts; | |
ccb1352e JG |
1294 | |
1295 | /* Bail out if we're not allowed to modify an existing flow. | |
1296 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1297 | * because Generic Netlink treats the latter as a dump | |
1298 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1299 | * gets fixed. | |
1300 | */ | |
1301 | error = -EEXIST; | |
1302 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && | |
1303 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) | |
8e4e1713 | 1304 | goto err_unlock_ovs; |
ccb1352e JG |
1305 | |
1306 | /* Update actions. */ | |
8e4e1713 | 1307 | old_acts = ovsl_dereference(flow->sf_acts); |
74f84a57 PS |
1308 | rcu_assign_pointer(flow->sf_acts, acts); |
1309 | ovs_flow_deferred_free_acts(old_acts); | |
ccb1352e | 1310 | |
15e47304 | 1311 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
ccb1352e JG |
1312 | info->snd_seq, OVS_FLOW_CMD_NEW); |
1313 | ||
1314 | /* Clear stats. */ | |
1315 | if (a[OVS_FLOW_ATTR_CLEAR]) { | |
1316 | spin_lock_bh(&flow->lock); | |
1317 | clear_stats(flow); | |
1318 | spin_unlock_bh(&flow->lock); | |
1319 | } | |
1320 | } | |
8e4e1713 | 1321 | ovs_unlock(); |
ccb1352e JG |
1322 | |
1323 | if (!IS_ERR(reply)) | |
ed661185 | 1324 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
ccb1352e | 1325 | else |
46df7b81 | 1326 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, |
ccb1352e JG |
1327 | ovs_dp_flow_multicast_group.id, PTR_ERR(reply)); |
1328 | return 0; | |
1329 | ||
8e4e1713 PS |
1330 | err_unlock_ovs: |
1331 | ovs_unlock(); | |
74f84a57 PS |
1332 | err_kfree: |
1333 | kfree(acts); | |
ccb1352e JG |
1334 | error: |
1335 | return error; | |
1336 | } | |
1337 | ||
1338 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1339 | { | |
1340 | struct nlattr **a = info->attrs; | |
1341 | struct ovs_header *ovs_header = info->userhdr; | |
1342 | struct sw_flow_key key; | |
1343 | struct sk_buff *reply; | |
1344 | struct sw_flow *flow; | |
1345 | struct datapath *dp; | |
1346 | struct flow_table *table; | |
1347 | int err; | |
1348 | int key_len; | |
1349 | ||
1350 | if (!a[OVS_FLOW_ATTR_KEY]) | |
1351 | return -EINVAL; | |
1352 | err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); | |
1353 | if (err) | |
1354 | return err; | |
1355 | ||
8e4e1713 | 1356 | ovs_lock(); |
46df7b81 | 1357 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1358 | if (!dp) { |
1359 | err = -ENODEV; | |
1360 | goto unlock; | |
1361 | } | |
ccb1352e | 1362 | |
8e4e1713 | 1363 | table = ovsl_dereference(dp->table); |
ccb1352e | 1364 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
8e4e1713 PS |
1365 | if (!flow) { |
1366 | err = -ENOENT; | |
1367 | goto unlock; | |
1368 | } | |
ccb1352e | 1369 | |
15e47304 | 1370 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
ccb1352e | 1371 | info->snd_seq, OVS_FLOW_CMD_NEW); |
8e4e1713 PS |
1372 | if (IS_ERR(reply)) { |
1373 | err = PTR_ERR(reply); | |
1374 | goto unlock; | |
1375 | } | |
ccb1352e | 1376 | |
8e4e1713 | 1377 | ovs_unlock(); |
ccb1352e | 1378 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1379 | unlock: |
1380 | ovs_unlock(); | |
1381 | return err; | |
ccb1352e JG |
1382 | } |
1383 | ||
1384 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1385 | { | |
1386 | struct nlattr **a = info->attrs; | |
1387 | struct ovs_header *ovs_header = info->userhdr; | |
1388 | struct sw_flow_key key; | |
1389 | struct sk_buff *reply; | |
1390 | struct sw_flow *flow; | |
1391 | struct datapath *dp; | |
1392 | struct flow_table *table; | |
1393 | int err; | |
1394 | int key_len; | |
1395 | ||
8e4e1713 | 1396 | ovs_lock(); |
46df7b81 | 1397 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1398 | if (!dp) { |
1399 | err = -ENODEV; | |
1400 | goto unlock; | |
1401 | } | |
46df7b81 | 1402 | |
8e4e1713 PS |
1403 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1404 | err = flush_flows(dp); | |
1405 | goto unlock; | |
1406 | } | |
ccb1352e JG |
1407 | err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
1408 | if (err) | |
8e4e1713 | 1409 | goto unlock; |
ccb1352e | 1410 | |
8e4e1713 | 1411 | table = ovsl_dereference(dp->table); |
ccb1352e | 1412 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
8e4e1713 PS |
1413 | if (!flow) { |
1414 | err = -ENOENT; | |
1415 | goto unlock; | |
1416 | } | |
ccb1352e JG |
1417 | |
1418 | reply = ovs_flow_cmd_alloc_info(flow); | |
8e4e1713 PS |
1419 | if (!reply) { |
1420 | err = -ENOMEM; | |
1421 | goto unlock; | |
1422 | } | |
ccb1352e JG |
1423 | |
1424 | ovs_flow_tbl_remove(table, flow); | |
1425 | ||
15e47304 | 1426 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid, |
ccb1352e JG |
1427 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); |
1428 | BUG_ON(err < 0); | |
1429 | ||
1430 | ovs_flow_deferred_free(flow); | |
8e4e1713 | 1431 | ovs_unlock(); |
ccb1352e | 1432 | |
ed661185 | 1433 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
ccb1352e | 1434 | return 0; |
8e4e1713 PS |
1435 | unlock: |
1436 | ovs_unlock(); | |
1437 | return err; | |
ccb1352e JG |
1438 | } |
1439 | ||
1440 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1441 | { | |
1442 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
1443 | struct datapath *dp; | |
1444 | struct flow_table *table; | |
1445 | ||
d57170b1 | 1446 | rcu_read_lock(); |
46df7b81 | 1447 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1448 | if (!dp) { |
d57170b1 | 1449 | rcu_read_unlock(); |
ccb1352e | 1450 | return -ENODEV; |
8e4e1713 | 1451 | } |
ccb1352e | 1452 | |
d57170b1 | 1453 | table = rcu_dereference(dp->table); |
ccb1352e JG |
1454 | for (;;) { |
1455 | struct sw_flow *flow; | |
1456 | u32 bucket, obj; | |
1457 | ||
1458 | bucket = cb->args[0]; | |
1459 | obj = cb->args[1]; | |
1460 | flow = ovs_flow_tbl_next(table, &bucket, &obj); | |
1461 | if (!flow) | |
1462 | break; | |
1463 | ||
1464 | if (ovs_flow_cmd_fill_info(flow, dp, skb, | |
15e47304 | 1465 | NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1466 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1467 | OVS_FLOW_CMD_NEW) < 0) | |
1468 | break; | |
1469 | ||
1470 | cb->args[0] = bucket; | |
1471 | cb->args[1] = obj; | |
1472 | } | |
d57170b1 | 1473 | rcu_read_unlock(); |
ccb1352e JG |
1474 | return skb->len; |
1475 | } | |
1476 | ||
1477 | static struct genl_ops dp_flow_genl_ops[] = { | |
1478 | { .cmd = OVS_FLOW_CMD_NEW, | |
1479 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1480 | .policy = flow_policy, | |
1481 | .doit = ovs_flow_cmd_new_or_set | |
1482 | }, | |
1483 | { .cmd = OVS_FLOW_CMD_DEL, | |
1484 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1485 | .policy = flow_policy, | |
1486 | .doit = ovs_flow_cmd_del | |
1487 | }, | |
1488 | { .cmd = OVS_FLOW_CMD_GET, | |
1489 | .flags = 0, /* OK for unprivileged users. */ | |
1490 | .policy = flow_policy, | |
1491 | .doit = ovs_flow_cmd_get, | |
1492 | .dumpit = ovs_flow_cmd_dump | |
1493 | }, | |
1494 | { .cmd = OVS_FLOW_CMD_SET, | |
1495 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1496 | .policy = flow_policy, | |
1497 | .doit = ovs_flow_cmd_new_or_set, | |
1498 | }, | |
1499 | }; | |
1500 | ||
1501 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { | |
1502 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1503 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1504 | }; | |
1505 | ||
1506 | static struct genl_family dp_datapath_genl_family = { | |
1507 | .id = GENL_ID_GENERATE, | |
1508 | .hdrsize = sizeof(struct ovs_header), | |
1509 | .name = OVS_DATAPATH_FAMILY, | |
1510 | .version = OVS_DATAPATH_VERSION, | |
46df7b81 | 1511 | .maxattr = OVS_DP_ATTR_MAX, |
3a4e0d6a PS |
1512 | .netnsok = true, |
1513 | .parallel_ops = true, | |
ccb1352e JG |
1514 | }; |
1515 | ||
1516 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { | |
1517 | .name = OVS_DATAPATH_MCGROUP | |
1518 | }; | |
1519 | ||
c3ff8cfe TG |
1520 | static size_t ovs_dp_cmd_msg_size(void) |
1521 | { | |
1522 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1523 | ||
1524 | msgsize += nla_total_size(IFNAMSIZ); | |
1525 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1526 | ||
1527 | return msgsize; | |
1528 | } | |
1529 | ||
ccb1352e | 1530 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1531 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1532 | { |
1533 | struct ovs_header *ovs_header; | |
1534 | struct ovs_dp_stats dp_stats; | |
1535 | int err; | |
1536 | ||
15e47304 | 1537 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1538 | flags, cmd); |
1539 | if (!ovs_header) | |
1540 | goto error; | |
1541 | ||
1542 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1543 | ||
1544 | rcu_read_lock(); | |
1545 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); | |
1546 | rcu_read_unlock(); | |
1547 | if (err) | |
1548 | goto nla_put_failure; | |
1549 | ||
1550 | get_dp_stats(dp, &dp_stats); | |
028d6a67 DM |
1551 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats)) |
1552 | goto nla_put_failure; | |
ccb1352e JG |
1553 | |
1554 | return genlmsg_end(skb, ovs_header); | |
1555 | ||
1556 | nla_put_failure: | |
1557 | genlmsg_cancel(skb, ovs_header); | |
1558 | error: | |
1559 | return -EMSGSIZE; | |
1560 | } | |
1561 | ||
15e47304 | 1562 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 portid, |
ccb1352e JG |
1563 | u32 seq, u8 cmd) |
1564 | { | |
1565 | struct sk_buff *skb; | |
1566 | int retval; | |
1567 | ||
c3ff8cfe | 1568 | skb = genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1569 | if (!skb) |
1570 | return ERR_PTR(-ENOMEM); | |
1571 | ||
15e47304 | 1572 | retval = ovs_dp_cmd_fill_info(dp, skb, portid, seq, 0, cmd); |
ccb1352e JG |
1573 | if (retval < 0) { |
1574 | kfree_skb(skb); | |
1575 | return ERR_PTR(retval); | |
1576 | } | |
1577 | return skb; | |
1578 | } | |
1579 | ||
8e4e1713 | 1580 | /* Called with ovs_mutex. */ |
46df7b81 PS |
1581 | static struct datapath *lookup_datapath(struct net *net, |
1582 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1583 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1584 | { | |
1585 | struct datapath *dp; | |
1586 | ||
1587 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1588 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1589 | else { |
1590 | struct vport *vport; | |
1591 | ||
1592 | rcu_read_lock(); | |
46df7b81 | 1593 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e JG |
1594 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
1595 | rcu_read_unlock(); | |
1596 | } | |
1597 | return dp ? dp : ERR_PTR(-ENODEV); | |
1598 | } | |
1599 | ||
1600 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
1601 | { | |
1602 | struct nlattr **a = info->attrs; | |
1603 | struct vport_parms parms; | |
1604 | struct sk_buff *reply; | |
1605 | struct datapath *dp; | |
1606 | struct vport *vport; | |
46df7b81 | 1607 | struct ovs_net *ovs_net; |
15eac2a7 | 1608 | int err, i; |
ccb1352e JG |
1609 | |
1610 | err = -EINVAL; | |
1611 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1612 | goto err; | |
1613 | ||
8e4e1713 | 1614 | ovs_lock(); |
ccb1352e JG |
1615 | |
1616 | err = -ENOMEM; | |
1617 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1618 | if (dp == NULL) | |
8e4e1713 | 1619 | goto err_unlock_ovs; |
46df7b81 | 1620 | |
46df7b81 | 1621 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
ccb1352e JG |
1622 | |
1623 | /* Allocate table. */ | |
1624 | err = -ENOMEM; | |
1625 | rcu_assign_pointer(dp->table, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS)); | |
1626 | if (!dp->table) | |
1627 | goto err_free_dp; | |
1628 | ||
1629 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); | |
1630 | if (!dp->stats_percpu) { | |
1631 | err = -ENOMEM; | |
1632 | goto err_destroy_table; | |
1633 | } | |
1634 | ||
15eac2a7 PS |
1635 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1636 | GFP_KERNEL); | |
1637 | if (!dp->ports) { | |
1638 | err = -ENOMEM; | |
1639 | goto err_destroy_percpu; | |
1640 | } | |
1641 | ||
1642 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1643 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1644 | ||
ccb1352e JG |
1645 | /* Set up our datapath device. */ |
1646 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1647 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1648 | parms.options = NULL; | |
1649 | parms.dp = dp; | |
1650 | parms.port_no = OVSP_LOCAL; | |
15e47304 | 1651 | parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
ccb1352e JG |
1652 | |
1653 | vport = new_vport(&parms); | |
1654 | if (IS_ERR(vport)) { | |
1655 | err = PTR_ERR(vport); | |
1656 | if (err == -EBUSY) | |
1657 | err = -EEXIST; | |
1658 | ||
15eac2a7 | 1659 | goto err_destroy_ports_array; |
ccb1352e JG |
1660 | } |
1661 | ||
15e47304 | 1662 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
ccb1352e JG |
1663 | info->snd_seq, OVS_DP_CMD_NEW); |
1664 | err = PTR_ERR(reply); | |
1665 | if (IS_ERR(reply)) | |
1666 | goto err_destroy_local_port; | |
1667 | ||
46df7b81 | 1668 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1669 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1670 | |
1671 | ovs_unlock(); | |
ccb1352e | 1672 | |
ed661185 | 1673 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
ccb1352e JG |
1674 | return 0; |
1675 | ||
1676 | err_destroy_local_port: | |
8e4e1713 | 1677 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
15eac2a7 PS |
1678 | err_destroy_ports_array: |
1679 | kfree(dp->ports); | |
ccb1352e JG |
1680 | err_destroy_percpu: |
1681 | free_percpu(dp->stats_percpu); | |
1682 | err_destroy_table: | |
8e4e1713 | 1683 | ovs_flow_tbl_destroy(ovsl_dereference(dp->table)); |
ccb1352e | 1684 | err_free_dp: |
46df7b81 | 1685 | release_net(ovs_dp_get_net(dp)); |
ccb1352e | 1686 | kfree(dp); |
8e4e1713 PS |
1687 | err_unlock_ovs: |
1688 | ovs_unlock(); | |
ccb1352e JG |
1689 | err: |
1690 | return err; | |
1691 | } | |
1692 | ||
8e4e1713 | 1693 | /* Called with ovs_mutex. */ |
46df7b81 | 1694 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1695 | { |
15eac2a7 | 1696 | int i; |
ccb1352e | 1697 | |
15eac2a7 PS |
1698 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1699 | struct vport *vport; | |
b67bfe0d | 1700 | struct hlist_node *n; |
15eac2a7 | 1701 | |
b67bfe0d | 1702 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1703 | if (vport->port_no != OVSP_LOCAL) |
1704 | ovs_dp_detach_port(vport); | |
1705 | } | |
ccb1352e | 1706 | |
59a35d60 | 1707 | list_del_rcu(&dp->list_node); |
ccb1352e | 1708 | |
8e4e1713 PS |
1709 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
1710 | * all port in datapath are destroyed first before freeing datapath. | |
ccb1352e | 1711 | */ |
8e4e1713 | 1712 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e JG |
1713 | |
1714 | call_rcu(&dp->rcu, destroy_dp_rcu); | |
46df7b81 PS |
1715 | } |
1716 | ||
1717 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1718 | { | |
1719 | struct sk_buff *reply; | |
1720 | struct datapath *dp; | |
1721 | int err; | |
1722 | ||
8e4e1713 | 1723 | ovs_lock(); |
46df7b81 PS |
1724 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1725 | err = PTR_ERR(dp); | |
1726 | if (IS_ERR(dp)) | |
8e4e1713 | 1727 | goto unlock; |
46df7b81 | 1728 | |
15e47304 | 1729 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
46df7b81 PS |
1730 | info->snd_seq, OVS_DP_CMD_DEL); |
1731 | err = PTR_ERR(reply); | |
1732 | if (IS_ERR(reply)) | |
8e4e1713 | 1733 | goto unlock; |
46df7b81 PS |
1734 | |
1735 | __dp_destroy(dp); | |
8e4e1713 | 1736 | ovs_unlock(); |
ccb1352e | 1737 | |
ed661185 | 1738 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
ccb1352e JG |
1739 | |
1740 | return 0; | |
8e4e1713 PS |
1741 | unlock: |
1742 | ovs_unlock(); | |
1743 | return err; | |
ccb1352e JG |
1744 | } |
1745 | ||
1746 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1747 | { | |
1748 | struct sk_buff *reply; | |
1749 | struct datapath *dp; | |
1750 | int err; | |
1751 | ||
8e4e1713 | 1752 | ovs_lock(); |
46df7b81 | 1753 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1754 | err = PTR_ERR(dp); |
ccb1352e | 1755 | if (IS_ERR(dp)) |
8e4e1713 | 1756 | goto unlock; |
ccb1352e | 1757 | |
15e47304 | 1758 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
ccb1352e JG |
1759 | info->snd_seq, OVS_DP_CMD_NEW); |
1760 | if (IS_ERR(reply)) { | |
1761 | err = PTR_ERR(reply); | |
46df7b81 | 1762 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, |
ccb1352e | 1763 | ovs_dp_datapath_multicast_group.id, err); |
8e4e1713 PS |
1764 | err = 0; |
1765 | goto unlock; | |
ccb1352e JG |
1766 | } |
1767 | ||
8e4e1713 | 1768 | ovs_unlock(); |
ed661185 | 1769 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
ccb1352e JG |
1770 | |
1771 | return 0; | |
8e4e1713 PS |
1772 | unlock: |
1773 | ovs_unlock(); | |
1774 | return err; | |
ccb1352e JG |
1775 | } |
1776 | ||
1777 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1778 | { | |
1779 | struct sk_buff *reply; | |
1780 | struct datapath *dp; | |
8e4e1713 | 1781 | int err; |
ccb1352e | 1782 | |
8e4e1713 | 1783 | ovs_lock(); |
46df7b81 | 1784 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1785 | if (IS_ERR(dp)) { |
1786 | err = PTR_ERR(dp); | |
1787 | goto unlock; | |
1788 | } | |
ccb1352e | 1789 | |
15e47304 | 1790 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
ccb1352e | 1791 | info->snd_seq, OVS_DP_CMD_NEW); |
8e4e1713 PS |
1792 | if (IS_ERR(reply)) { |
1793 | err = PTR_ERR(reply); | |
1794 | goto unlock; | |
1795 | } | |
ccb1352e | 1796 | |
8e4e1713 | 1797 | ovs_unlock(); |
ccb1352e | 1798 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1799 | |
1800 | unlock: | |
1801 | ovs_unlock(); | |
1802 | return err; | |
ccb1352e JG |
1803 | } |
1804 | ||
1805 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1806 | { | |
46df7b81 | 1807 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1808 | struct datapath *dp; |
1809 | int skip = cb->args[0]; | |
1810 | int i = 0; | |
1811 | ||
59a35d60 PS |
1812 | rcu_read_lock(); |
1813 | list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1814 | if (i >= skip && |
15e47304 | 1815 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1816 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1817 | OVS_DP_CMD_NEW) < 0) | |
1818 | break; | |
1819 | i++; | |
1820 | } | |
59a35d60 | 1821 | rcu_read_unlock(); |
ccb1352e JG |
1822 | |
1823 | cb->args[0] = i; | |
1824 | ||
1825 | return skb->len; | |
1826 | } | |
1827 | ||
1828 | static struct genl_ops dp_datapath_genl_ops[] = { | |
1829 | { .cmd = OVS_DP_CMD_NEW, | |
1830 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1831 | .policy = datapath_policy, | |
1832 | .doit = ovs_dp_cmd_new | |
1833 | }, | |
1834 | { .cmd = OVS_DP_CMD_DEL, | |
1835 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1836 | .policy = datapath_policy, | |
1837 | .doit = ovs_dp_cmd_del | |
1838 | }, | |
1839 | { .cmd = OVS_DP_CMD_GET, | |
1840 | .flags = 0, /* OK for unprivileged users. */ | |
1841 | .policy = datapath_policy, | |
1842 | .doit = ovs_dp_cmd_get, | |
1843 | .dumpit = ovs_dp_cmd_dump | |
1844 | }, | |
1845 | { .cmd = OVS_DP_CMD_SET, | |
1846 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1847 | .policy = datapath_policy, | |
1848 | .doit = ovs_dp_cmd_set, | |
1849 | }, | |
1850 | }; | |
1851 | ||
1852 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { | |
1853 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1854 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
1855 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
1856 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
1857 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1858 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
1859 | }; | |
1860 | ||
1861 | static struct genl_family dp_vport_genl_family = { | |
1862 | .id = GENL_ID_GENERATE, | |
1863 | .hdrsize = sizeof(struct ovs_header), | |
1864 | .name = OVS_VPORT_FAMILY, | |
1865 | .version = OVS_VPORT_VERSION, | |
46df7b81 | 1866 | .maxattr = OVS_VPORT_ATTR_MAX, |
3a4e0d6a PS |
1867 | .netnsok = true, |
1868 | .parallel_ops = true, | |
ccb1352e JG |
1869 | }; |
1870 | ||
1871 | struct genl_multicast_group ovs_dp_vport_multicast_group = { | |
1872 | .name = OVS_VPORT_MCGROUP | |
1873 | }; | |
1874 | ||
8e4e1713 | 1875 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1876 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1877 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1878 | { |
1879 | struct ovs_header *ovs_header; | |
1880 | struct ovs_vport_stats vport_stats; | |
1881 | int err; | |
1882 | ||
15e47304 | 1883 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1884 | flags, cmd); |
1885 | if (!ovs_header) | |
1886 | return -EMSGSIZE; | |
1887 | ||
1888 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1889 | ||
028d6a67 DM |
1890 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1891 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
1892 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || | |
15e47304 | 1893 | nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid)) |
028d6a67 | 1894 | goto nla_put_failure; |
ccb1352e JG |
1895 | |
1896 | ovs_vport_get_stats(vport, &vport_stats); | |
028d6a67 DM |
1897 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1898 | &vport_stats)) | |
1899 | goto nla_put_failure; | |
ccb1352e JG |
1900 | |
1901 | err = ovs_vport_get_options(vport, skb); | |
1902 | if (err == -EMSGSIZE) | |
1903 | goto error; | |
1904 | ||
1905 | return genlmsg_end(skb, ovs_header); | |
1906 | ||
1907 | nla_put_failure: | |
1908 | err = -EMSGSIZE; | |
1909 | error: | |
1910 | genlmsg_cancel(skb, ovs_header); | |
1911 | return err; | |
1912 | } | |
1913 | ||
8e4e1713 | 1914 | /* Called with ovs_mutex or RCU read lock. */ |
15e47304 | 1915 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1916 | u32 seq, u8 cmd) |
1917 | { | |
1918 | struct sk_buff *skb; | |
1919 | int retval; | |
1920 | ||
1921 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1922 | if (!skb) | |
1923 | return ERR_PTR(-ENOMEM); | |
1924 | ||
15e47304 | 1925 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1926 | BUG_ON(retval < 0); |
1927 | ||
ccb1352e JG |
1928 | return skb; |
1929 | } | |
1930 | ||
8e4e1713 | 1931 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 PS |
1932 | static struct vport *lookup_vport(struct net *net, |
1933 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1934 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1935 | { | |
1936 | struct datapath *dp; | |
1937 | struct vport *vport; | |
1938 | ||
1939 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1940 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1941 | if (!vport) |
1942 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1943 | if (ovs_header->dp_ifindex && |
1944 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1945 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1946 | return vport; |
1947 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1948 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1949 | ||
1950 | if (port_no >= DP_MAX_PORTS) | |
1951 | return ERR_PTR(-EFBIG); | |
1952 | ||
46df7b81 | 1953 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1954 | if (!dp) |
1955 | return ERR_PTR(-ENODEV); | |
1956 | ||
8e4e1713 | 1957 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1958 | if (!vport) |
14408dba | 1959 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1960 | return vport; |
1961 | } else | |
1962 | return ERR_PTR(-EINVAL); | |
1963 | } | |
1964 | ||
1965 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
1966 | { | |
1967 | struct nlattr **a = info->attrs; | |
1968 | struct ovs_header *ovs_header = info->userhdr; | |
1969 | struct vport_parms parms; | |
1970 | struct sk_buff *reply; | |
1971 | struct vport *vport; | |
1972 | struct datapath *dp; | |
1973 | u32 port_no; | |
1974 | int err; | |
1975 | ||
1976 | err = -EINVAL; | |
1977 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || | |
1978 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
1979 | goto exit; | |
1980 | ||
8e4e1713 | 1981 | ovs_lock(); |
46df7b81 | 1982 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1983 | err = -ENODEV; |
1984 | if (!dp) | |
1985 | goto exit_unlock; | |
1986 | ||
1987 | if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1988 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1989 | ||
1990 | err = -EFBIG; | |
1991 | if (port_no >= DP_MAX_PORTS) | |
1992 | goto exit_unlock; | |
1993 | ||
8e4e1713 | 1994 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1995 | err = -EBUSY; |
1996 | if (vport) | |
1997 | goto exit_unlock; | |
1998 | } else { | |
1999 | for (port_no = 1; ; port_no++) { | |
2000 | if (port_no >= DP_MAX_PORTS) { | |
2001 | err = -EFBIG; | |
2002 | goto exit_unlock; | |
2003 | } | |
8e4e1713 | 2004 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2005 | if (!vport) |
2006 | break; | |
2007 | } | |
2008 | } | |
2009 | ||
2010 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2011 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2012 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2013 | parms.dp = dp; | |
2014 | parms.port_no = port_no; | |
15e47304 | 2015 | parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
ccb1352e JG |
2016 | |
2017 | vport = new_vport(&parms); | |
2018 | err = PTR_ERR(vport); | |
2019 | if (IS_ERR(vport)) | |
2020 | goto exit_unlock; | |
2021 | ||
cb7c5bdf | 2022 | err = 0; |
15e47304 | 2023 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, |
ccb1352e JG |
2024 | OVS_VPORT_CMD_NEW); |
2025 | if (IS_ERR(reply)) { | |
2026 | err = PTR_ERR(reply); | |
2027 | ovs_dp_detach_port(vport); | |
2028 | goto exit_unlock; | |
2029 | } | |
ed661185 TG |
2030 | |
2031 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); | |
ccb1352e JG |
2032 | |
2033 | exit_unlock: | |
8e4e1713 | 2034 | ovs_unlock(); |
ccb1352e JG |
2035 | exit: |
2036 | return err; | |
2037 | } | |
2038 | ||
2039 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2040 | { | |
2041 | struct nlattr **a = info->attrs; | |
2042 | struct sk_buff *reply; | |
2043 | struct vport *vport; | |
2044 | int err; | |
2045 | ||
8e4e1713 | 2046 | ovs_lock(); |
46df7b81 | 2047 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2048 | err = PTR_ERR(vport); |
2049 | if (IS_ERR(vport)) | |
2050 | goto exit_unlock; | |
2051 | ||
ccb1352e | 2052 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2053 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2054 | err = -EINVAL; |
f44f3408 JG |
2055 | goto exit_unlock; |
2056 | } | |
ccb1352e | 2057 | |
a9341512 JG |
2058 | reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
2059 | if (!reply) { | |
2060 | err = -ENOMEM; | |
2061 | goto exit_unlock; | |
2062 | } | |
2063 | ||
f44f3408 | 2064 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2065 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 JG |
2066 | if (err) |
2067 | goto exit_free; | |
2068 | } | |
a9341512 | 2069 | |
03fbf8b3 | 2070 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) |
15e47304 | 2071 | vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
ccb1352e | 2072 | |
a9341512 JG |
2073 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2074 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2075 | BUG_ON(err < 0); | |
ccb1352e | 2076 | |
8e4e1713 | 2077 | ovs_unlock(); |
ed661185 | 2078 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
8e4e1713 | 2079 | return 0; |
ccb1352e | 2080 | |
a9341512 JG |
2081 | exit_free: |
2082 | kfree_skb(reply); | |
ccb1352e | 2083 | exit_unlock: |
8e4e1713 | 2084 | ovs_unlock(); |
ccb1352e JG |
2085 | return err; |
2086 | } | |
2087 | ||
2088 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2089 | { | |
2090 | struct nlattr **a = info->attrs; | |
2091 | struct sk_buff *reply; | |
2092 | struct vport *vport; | |
2093 | int err; | |
2094 | ||
8e4e1713 | 2095 | ovs_lock(); |
46df7b81 | 2096 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2097 | err = PTR_ERR(vport); |
2098 | if (IS_ERR(vport)) | |
2099 | goto exit_unlock; | |
2100 | ||
2101 | if (vport->port_no == OVSP_LOCAL) { | |
2102 | err = -EINVAL; | |
2103 | goto exit_unlock; | |
2104 | } | |
2105 | ||
74f84a57 PS |
2106 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2107 | info->snd_seq, OVS_VPORT_CMD_DEL); | |
ccb1352e JG |
2108 | err = PTR_ERR(reply); |
2109 | if (IS_ERR(reply)) | |
2110 | goto exit_unlock; | |
2111 | ||
734907e8 | 2112 | err = 0; |
ccb1352e JG |
2113 | ovs_dp_detach_port(vport); |
2114 | ||
ed661185 | 2115 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
ccb1352e JG |
2116 | |
2117 | exit_unlock: | |
8e4e1713 | 2118 | ovs_unlock(); |
ccb1352e JG |
2119 | return err; |
2120 | } | |
2121 | ||
2122 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2123 | { | |
2124 | struct nlattr **a = info->attrs; | |
2125 | struct ovs_header *ovs_header = info->userhdr; | |
2126 | struct sk_buff *reply; | |
2127 | struct vport *vport; | |
2128 | int err; | |
2129 | ||
2130 | rcu_read_lock(); | |
46df7b81 | 2131 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2132 | err = PTR_ERR(vport); |
2133 | if (IS_ERR(vport)) | |
2134 | goto exit_unlock; | |
2135 | ||
74f84a57 PS |
2136 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2137 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
ccb1352e JG |
2138 | err = PTR_ERR(reply); |
2139 | if (IS_ERR(reply)) | |
2140 | goto exit_unlock; | |
2141 | ||
2142 | rcu_read_unlock(); | |
2143 | ||
2144 | return genlmsg_reply(reply, info); | |
2145 | ||
2146 | exit_unlock: | |
2147 | rcu_read_unlock(); | |
2148 | return err; | |
2149 | } | |
2150 | ||
2151 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2152 | { | |
2153 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2154 | struct datapath *dp; | |
15eac2a7 PS |
2155 | int bucket = cb->args[0], skip = cb->args[1]; |
2156 | int i, j = 0; | |
ccb1352e | 2157 | |
46df7b81 | 2158 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
2159 | if (!dp) |
2160 | return -ENODEV; | |
2161 | ||
2162 | rcu_read_lock(); | |
15eac2a7 | 2163 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2164 | struct vport *vport; |
15eac2a7 PS |
2165 | |
2166 | j = 0; | |
b67bfe0d | 2167 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2168 | if (j >= skip && |
2169 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 2170 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2171 | cb->nlh->nlmsg_seq, |
2172 | NLM_F_MULTI, | |
2173 | OVS_VPORT_CMD_NEW) < 0) | |
2174 | goto out; | |
2175 | ||
2176 | j++; | |
2177 | } | |
2178 | skip = 0; | |
ccb1352e | 2179 | } |
15eac2a7 | 2180 | out: |
ccb1352e JG |
2181 | rcu_read_unlock(); |
2182 | ||
15eac2a7 PS |
2183 | cb->args[0] = i; |
2184 | cb->args[1] = j; | |
ccb1352e | 2185 | |
15eac2a7 | 2186 | return skb->len; |
ccb1352e JG |
2187 | } |
2188 | ||
ccb1352e JG |
2189 | static struct genl_ops dp_vport_genl_ops[] = { |
2190 | { .cmd = OVS_VPORT_CMD_NEW, | |
2191 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2192 | .policy = vport_policy, | |
2193 | .doit = ovs_vport_cmd_new | |
2194 | }, | |
2195 | { .cmd = OVS_VPORT_CMD_DEL, | |
2196 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2197 | .policy = vport_policy, | |
2198 | .doit = ovs_vport_cmd_del | |
2199 | }, | |
2200 | { .cmd = OVS_VPORT_CMD_GET, | |
2201 | .flags = 0, /* OK for unprivileged users. */ | |
2202 | .policy = vport_policy, | |
2203 | .doit = ovs_vport_cmd_get, | |
2204 | .dumpit = ovs_vport_cmd_dump | |
2205 | }, | |
2206 | { .cmd = OVS_VPORT_CMD_SET, | |
2207 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2208 | .policy = vport_policy, | |
2209 | .doit = ovs_vport_cmd_set, | |
2210 | }, | |
2211 | }; | |
2212 | ||
2213 | struct genl_family_and_ops { | |
2214 | struct genl_family *family; | |
2215 | struct genl_ops *ops; | |
2216 | int n_ops; | |
2217 | struct genl_multicast_group *group; | |
2218 | }; | |
2219 | ||
2220 | static const struct genl_family_and_ops dp_genl_families[] = { | |
2221 | { &dp_datapath_genl_family, | |
2222 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
2223 | &ovs_dp_datapath_multicast_group }, | |
2224 | { &dp_vport_genl_family, | |
2225 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
2226 | &ovs_dp_vport_multicast_group }, | |
2227 | { &dp_flow_genl_family, | |
2228 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
2229 | &ovs_dp_flow_multicast_group }, | |
2230 | { &dp_packet_genl_family, | |
2231 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
2232 | NULL }, | |
2233 | }; | |
2234 | ||
2235 | static void dp_unregister_genl(int n_families) | |
2236 | { | |
2237 | int i; | |
2238 | ||
2239 | for (i = 0; i < n_families; i++) | |
2240 | genl_unregister_family(dp_genl_families[i].family); | |
2241 | } | |
2242 | ||
2243 | static int dp_register_genl(void) | |
2244 | { | |
2245 | int n_registered; | |
2246 | int err; | |
2247 | int i; | |
2248 | ||
2249 | n_registered = 0; | |
2250 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2251 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
2252 | ||
2253 | err = genl_register_family_with_ops(f->family, f->ops, | |
2254 | f->n_ops); | |
2255 | if (err) | |
2256 | goto error; | |
2257 | n_registered++; | |
2258 | ||
2259 | if (f->group) { | |
2260 | err = genl_register_mc_group(f->family, f->group); | |
2261 | if (err) | |
2262 | goto error; | |
2263 | } | |
2264 | } | |
2265 | ||
2266 | return 0; | |
2267 | ||
2268 | error: | |
2269 | dp_unregister_genl(n_registered); | |
2270 | return err; | |
2271 | } | |
2272 | ||
46df7b81 PS |
2273 | static void rehash_flow_table(struct work_struct *work) |
2274 | { | |
2275 | struct datapath *dp; | |
2276 | struct net *net; | |
2277 | ||
8e4e1713 | 2278 | ovs_lock(); |
46df7b81 PS |
2279 | rtnl_lock(); |
2280 | for_each_net(net) { | |
2281 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2282 | ||
2283 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
8e4e1713 | 2284 | struct flow_table *old_table = ovsl_dereference(dp->table); |
46df7b81 PS |
2285 | struct flow_table *new_table; |
2286 | ||
2287 | new_table = ovs_flow_tbl_rehash(old_table); | |
2288 | if (!IS_ERR(new_table)) { | |
2289 | rcu_assign_pointer(dp->table, new_table); | |
2290 | ovs_flow_tbl_deferred_destroy(old_table); | |
2291 | } | |
2292 | } | |
2293 | } | |
2294 | rtnl_unlock(); | |
8e4e1713 | 2295 | ovs_unlock(); |
46df7b81 PS |
2296 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); |
2297 | } | |
2298 | ||
2299 | static int __net_init ovs_init_net(struct net *net) | |
2300 | { | |
2301 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2302 | ||
2303 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2304 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
46df7b81 PS |
2305 | return 0; |
2306 | } | |
2307 | ||
2308 | static void __net_exit ovs_exit_net(struct net *net) | |
2309 | { | |
46df7b81 | 2310 | struct datapath *dp, *dp_next; |
8e4e1713 | 2311 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
46df7b81 | 2312 | |
8e4e1713 | 2313 | ovs_lock(); |
46df7b81 PS |
2314 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2315 | __dp_destroy(dp); | |
8e4e1713 PS |
2316 | ovs_unlock(); |
2317 | ||
2318 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2319 | } |
2320 | ||
2321 | static struct pernet_operations ovs_net_ops = { | |
2322 | .init = ovs_init_net, | |
2323 | .exit = ovs_exit_net, | |
2324 | .id = &ovs_net_id, | |
2325 | .size = sizeof(struct ovs_net), | |
2326 | }; | |
2327 | ||
ccb1352e JG |
2328 | static int __init dp_init(void) |
2329 | { | |
ccb1352e JG |
2330 | int err; |
2331 | ||
3523b29b | 2332 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2333 | |
2334 | pr_info("Open vSwitch switching datapath\n"); | |
2335 | ||
2336 | err = ovs_flow_init(); | |
2337 | if (err) | |
2338 | goto error; | |
2339 | ||
2340 | err = ovs_vport_init(); | |
2341 | if (err) | |
2342 | goto error_flow_exit; | |
2343 | ||
46df7b81 | 2344 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2345 | if (err) |
2346 | goto error_vport_exit; | |
2347 | ||
46df7b81 PS |
2348 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2349 | if (err) | |
2350 | goto error_netns_exit; | |
2351 | ||
ccb1352e JG |
2352 | err = dp_register_genl(); |
2353 | if (err < 0) | |
2354 | goto error_unreg_notifier; | |
2355 | ||
2356 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); | |
2357 | ||
2358 | return 0; | |
2359 | ||
2360 | error_unreg_notifier: | |
2361 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2362 | error_netns_exit: |
2363 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2364 | error_vport_exit: |
2365 | ovs_vport_exit(); | |
2366 | error_flow_exit: | |
2367 | ovs_flow_exit(); | |
2368 | error: | |
2369 | return err; | |
2370 | } | |
2371 | ||
2372 | static void dp_cleanup(void) | |
2373 | { | |
2374 | cancel_delayed_work_sync(&rehash_flow_wq); | |
ccb1352e JG |
2375 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
2376 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2377 | unregister_pernet_device(&ovs_net_ops); |
2378 | rcu_barrier(); | |
ccb1352e JG |
2379 | ovs_vport_exit(); |
2380 | ovs_flow_exit(); | |
2381 | } | |
2382 | ||
2383 | module_init(dp_init); | |
2384 | module_exit(dp_cleanup); | |
2385 | ||
2386 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2387 | MODULE_LICENSE("GPL"); |