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