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Commit | Line | Data |
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064af421 | 1 | /* |
a5b8d49b | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
a14bc59f | 3 | * |
a9a29d22 JG |
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 | |
064af421 BP |
17 | */ |
18 | ||
dfffaef1 JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
064af421 BP |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> | |
064af421 | 23 | #include <linux/if_arp.h> |
064af421 BP |
24 | #include <linux/if_vlan.h> |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
982b8810 | 27 | #include <linux/jhash.h> |
064af421 BP |
28 | #include <linux/delay.h> |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
ed099e92 | 31 | #include <linux/genetlink.h> |
064af421 BP |
32 | #include <linux/kernel.h> |
33 | #include <linux/kthread.h> | |
064af421 BP |
34 | #include <linux/mutex.h> |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
39 | #include <linux/version.h> | |
40 | #include <linux/ethtool.h> | |
064af421 | 41 | #include <linux/wait.h> |
064af421 | 42 | #include <asm/div64.h> |
656a0e37 | 43 | #include <linux/highmem.h> |
064af421 BP |
44 | #include <linux/netfilter_bridge.h> |
45 | #include <linux/netfilter_ipv4.h> | |
46 | #include <linux/inetdevice.h> | |
47 | #include <linux/list.h> | |
077257b8 | 48 | #include <linux/openvswitch.h> |
064af421 | 49 | #include <linux/rculist.h> |
064af421 | 50 | #include <linux/dmi.h> |
36956a7d | 51 | #include <net/genetlink.h> |
2a4999f3 PS |
52 | #include <net/net_namespace.h> |
53 | #include <net/netns/generic.h> | |
064af421 | 54 | |
064af421 | 55 | #include "datapath.h" |
064af421 | 56 | #include "flow.h" |
d103f479 | 57 | #include "flow_table.h" |
a097c0b2 | 58 | #include "flow_netlink.h" |
303708cc | 59 | #include "vlan.h" |
f2459fe7 | 60 | #include "vport-internal_dev.h" |
d5de5b0d | 61 | #include "vport-netdev.h" |
064af421 | 62 | |
2a4999f3 PS |
63 | int ovs_net_id __read_mostly; |
64 | ||
cb25142c PS |
65 | static struct genl_family dp_packet_genl_family; |
66 | static struct genl_family dp_flow_genl_family; | |
67 | static struct genl_family dp_datapath_genl_family; | |
68 | ||
69 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { | |
70 | .name = OVS_FLOW_MCGROUP | |
71 | }; | |
72 | ||
73 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { | |
74 | .name = OVS_DATAPATH_MCGROUP | |
75 | }; | |
76 | ||
77 | struct genl_multicast_group ovs_dp_vport_multicast_group = { | |
78 | .name = OVS_VPORT_MCGROUP | |
79 | }; | |
80 | ||
afad3556 JR |
81 | /* Check if need to build a reply message. |
82 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
114fce23 SG |
83 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
84 | unsigned int group) | |
afad3556 JR |
85 | { |
86 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
114fce23 SG |
87 | genl_has_listeners(family, genl_info_net(info)->genl_sock, |
88 | group); | |
afad3556 JR |
89 | } |
90 | ||
cb25142c PS |
91 | static void ovs_notify(struct genl_family *family, struct genl_multicast_group *grp, |
92 | struct sk_buff *skb, struct genl_info *info) | |
e297c6b7 | 93 | { |
cb25142c PS |
94 | genl_notify(family, skb, genl_info_net(info), |
95 | info->snd_portid, GROUP_ID(grp), info->nlhdr, GFP_KERNEL); | |
e297c6b7 TG |
96 | } |
97 | ||
ed099e92 BP |
98 | /** |
99 | * DOC: Locking: | |
064af421 | 100 | * |
cd2a59e9 PS |
101 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
102 | * operations on vports, etc.), Writes to other state (flow table | |
103 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
104 | * by ovs_lock. | |
ed099e92 BP |
105 | * |
106 | * Reads are protected by RCU. | |
107 | * | |
108 | * There are a few special cases (mostly stats) that have their own | |
109 | * synchronization but they nest under all of above and don't interact with | |
110 | * each other. | |
cd2a59e9 PS |
111 | * |
112 | * The RTNL lock nests inside ovs_mutex. | |
064af421 | 113 | */ |
ed099e92 | 114 | |
cd2a59e9 PS |
115 | static DEFINE_MUTEX(ovs_mutex); |
116 | ||
117 | void ovs_lock(void) | |
118 | { | |
119 | mutex_lock(&ovs_mutex); | |
120 | } | |
121 | ||
122 | void ovs_unlock(void) | |
123 | { | |
124 | mutex_unlock(&ovs_mutex); | |
125 | } | |
126 | ||
127 | #ifdef CONFIG_LOCKDEP | |
128 | int lockdep_ovsl_is_held(void) | |
129 | { | |
130 | if (debug_locks) | |
131 | return lockdep_is_held(&ovs_mutex); | |
132 | else | |
133 | return 1; | |
134 | } | |
135 | #endif | |
136 | ||
5ae440c3 | 137 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
f1f60b85 TG |
138 | const struct sw_flow_key *, |
139 | const struct dp_upcall_info *); | |
5ae440c3 | 140 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
f1f60b85 | 141 | const struct sw_flow_key *key, |
7257b535 | 142 | const struct dp_upcall_info *); |
064af421 | 143 | |
01ac0970 AZ |
144 | /* Must be called with rcu_read_lock. */ |
145 | static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex) | |
064af421 | 146 | { |
01ac0970 | 147 | struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex); |
ed099e92 | 148 | |
254f2dc8 | 149 | if (dev) { |
850b6b3b | 150 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 | 151 | if (vport) |
01ac0970 | 152 | return vport->dp; |
254f2dc8 | 153 | } |
01ac0970 AZ |
154 | |
155 | return NULL; | |
156 | } | |
157 | ||
158 | /* The caller must hold either ovs_mutex or rcu_read_lock to keep the | |
159 | * returned dp pointer valid. */ | |
160 | static inline struct datapath *get_dp(struct net *net, int dp_ifindex) | |
161 | { | |
162 | struct datapath *dp; | |
163 | ||
164 | WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); | |
165 | rcu_read_lock(); | |
166 | dp = get_dp_rcu(net, dp_ifindex); | |
254f2dc8 BP |
167 | rcu_read_unlock(); |
168 | ||
169 | return dp; | |
064af421 | 170 | } |
064af421 | 171 | |
cd2a59e9 | 172 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 173 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 174 | { |
cd2a59e9 | 175 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
16b82e84 | 176 | return vport->ops->get_name(vport); |
f2459fe7 JG |
177 | } |
178 | ||
f1f60b85 | 179 | static int get_dpifindex(const struct datapath *dp) |
99769a40 JG |
180 | { |
181 | struct vport *local; | |
182 | int ifindex; | |
183 | ||
184 | rcu_read_lock(); | |
185 | ||
95b1d73a | 186 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 187 | if (local) |
d5de5b0d | 188 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
99769a40 JG |
189 | else |
190 | ifindex = 0; | |
191 | ||
192 | rcu_read_unlock(); | |
193 | ||
194 | return ifindex; | |
195 | } | |
196 | ||
46c6a11d JG |
197 | static void destroy_dp_rcu(struct rcu_head *rcu) |
198 | { | |
199 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 200 | |
e379e4d1 | 201 | ovs_flow_tbl_destroy(&dp->table); |
46c6a11d | 202 | free_percpu(dp->stats_percpu); |
2a4999f3 | 203 | release_net(ovs_dp_get_net(dp)); |
95b1d73a | 204 | kfree(dp->ports); |
5ca1ba48 | 205 | kfree(dp); |
46c6a11d JG |
206 | } |
207 | ||
95b1d73a PS |
208 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
209 | u16 port_no) | |
210 | { | |
211 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
212 | } | |
213 | ||
aa917006 | 214 | /* Called with ovs_mutex or RCU read lock. */ |
95b1d73a PS |
215 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
216 | { | |
217 | struct vport *vport; | |
95b1d73a PS |
218 | struct hlist_head *head; |
219 | ||
220 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 221 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
222 | if (vport->port_no == port_no) |
223 | return vport; | |
224 | } | |
225 | return NULL; | |
226 | } | |
227 | ||
cd2a59e9 | 228 | /* Called with ovs_mutex. */ |
c19e6535 | 229 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 230 | { |
f2459fe7 | 231 | struct vport *vport; |
f2459fe7 | 232 | |
850b6b3b | 233 | vport = ovs_vport_add(parms); |
c19e6535 BP |
234 | if (!IS_ERR(vport)) { |
235 | struct datapath *dp = parms->dp; | |
95b1d73a | 236 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 237 | |
95b1d73a | 238 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 239 | } |
c19e6535 | 240 | return vport; |
064af421 BP |
241 | } |
242 | ||
850b6b3b | 243 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 244 | { |
cd2a59e9 | 245 | ASSERT_OVSL(); |
064af421 | 246 | |
064af421 | 247 | /* First drop references to device. */ |
95b1d73a | 248 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 249 | |
7237e4f4 | 250 | /* Then destroy it. */ |
850b6b3b | 251 | ovs_vport_del(p); |
064af421 BP |
252 | } |
253 | ||
fb66fbd1 | 254 | /* Must be called with rcu_read_lock. */ |
e74d4817 | 255 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 256 | { |
a6059080 | 257 | const struct vport *p = OVS_CB(skb)->input_vport; |
064af421 | 258 | struct datapath *dp = p->dp; |
3544358a | 259 | struct sw_flow *flow; |
ad50cb60 | 260 | struct sw_flow_actions *sf_acts; |
064af421 | 261 | struct dp_stats_percpu *stats; |
e9141eec | 262 | u64 *stats_counter; |
4fa72a95 | 263 | u32 n_mask_hit; |
064af421 | 264 | |
70dbc259 | 265 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 266 | |
52a23d92 | 267 | /* Look up flow. */ |
e74d4817 | 268 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
5604935e | 269 | &n_mask_hit); |
52a23d92 JG |
270 | if (unlikely(!flow)) { |
271 | struct dp_upcall_info upcall; | |
a7d607c5 | 272 | int error; |
52a23d92 JG |
273 | |
274 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
52a23d92 | 275 | upcall.userdata = NULL; |
beb1c69a | 276 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
8b7ea2d4 | 277 | upcall.egress_tun_info = NULL; |
a7d607c5 | 278 | |
e74d4817 | 279 | error = ovs_dp_upcall(dp, skb, key, &upcall); |
a7d607c5 LR |
280 | if (unlikely(error)) |
281 | kfree_skb(skb); | |
282 | else | |
283 | consume_skb(skb); | |
284 | ||
52a23d92 JG |
285 | stats_counter = &stats->n_missed; |
286 | goto out; | |
287 | } | |
288 | ||
e74d4817 | 289 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
52a23d92 | 290 | |
ad50cb60 | 291 | sf_acts = rcu_dereference(flow->sf_acts); |
e74d4817 | 292 | ovs_execute_actions(dp, skb, key, sf_acts); |
b0b906cc | 293 | stats_counter = &stats->n_hit; |
55574bb0 | 294 | |
8819fac7 | 295 | out: |
55574bb0 | 296 | /* Update datapath statistics. */ |
b81deb15 | 297 | u64_stats_update_begin(&stats->syncp); |
e9141eec | 298 | (*stats_counter)++; |
4fa72a95 | 299 | stats->n_mask_hit += n_mask_hit; |
b81deb15 | 300 | u64_stats_update_end(&stats->syncp); |
064af421 BP |
301 | } |
302 | ||
850b6b3b | 303 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 304 | const struct sw_flow_key *key, |
850b6b3b | 305 | const struct dp_upcall_info *upcall_info) |
aa5a8fdc JG |
306 | { |
307 | struct dp_stats_percpu *stats; | |
308 | int err; | |
309 | ||
28aea917 | 310 | if (upcall_info->portid == 0) { |
b063d9f0 | 311 | err = -ENOTCONN; |
b063d9f0 JG |
312 | goto err; |
313 | } | |
314 | ||
7257b535 | 315 | if (!skb_is_gso(skb)) |
e74d4817 | 316 | err = queue_userspace_packet(dp, skb, key, upcall_info); |
7257b535 | 317 | else |
e74d4817 | 318 | err = queue_gso_packets(dp, skb, key, upcall_info); |
d76195db JG |
319 | if (err) |
320 | goto err; | |
321 | ||
322 | return 0; | |
aa5a8fdc | 323 | |
aa5a8fdc | 324 | err: |
70dbc259 | 325 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 326 | |
b81deb15 | 327 | u64_stats_update_begin(&stats->syncp); |
aa5a8fdc | 328 | stats->n_lost++; |
b81deb15 | 329 | u64_stats_update_end(&stats->syncp); |
aa5a8fdc | 330 | |
aa5a8fdc | 331 | return err; |
982b8810 BP |
332 | } |
333 | ||
5ae440c3 | 334 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 335 | const struct sw_flow_key *key, |
7257b535 | 336 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 337 | { |
d4cba1f8 | 338 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
339 | struct sw_flow_key later_key; |
340 | struct sk_buff *segs, *nskb; | |
b2a23c4e | 341 | struct ovs_skb_cb ovs_cb; |
7257b535 | 342 | int err; |
cb5087ca | 343 | |
b2a23c4e | 344 | ovs_cb = *OVS_CB(skb); |
1d04cd4e | 345 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
b2a23c4e | 346 | *OVS_CB(skb) = ovs_cb; |
79089764 PS |
347 | if (IS_ERR(segs)) |
348 | return PTR_ERR(segs); | |
d1da7669 PS |
349 | if (segs == NULL) |
350 | return -EINVAL; | |
99769a40 | 351 | |
9b277b39 | 352 | if (gso_type & SKB_GSO_UDP) { |
c135bba1 | 353 | /* The initial flow key extracted by ovs_flow_key_extract() |
9b277b39 PS |
354 | * in this case is for a first fragment, so we need to |
355 | * properly mark later fragments. | |
356 | */ | |
e74d4817 | 357 | later_key = *key; |
9b277b39 PS |
358 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
359 | } | |
360 | ||
7257b535 BP |
361 | /* Queue all of the segments. */ |
362 | skb = segs; | |
cb5087ca | 363 | do { |
b2a23c4e | 364 | *OVS_CB(skb) = ovs_cb; |
9b277b39 | 365 | if (gso_type & SKB_GSO_UDP && skb != segs) |
e74d4817 | 366 | key = &later_key; |
9b277b39 | 367 | |
e74d4817 | 368 | err = queue_userspace_packet(dp, skb, key, upcall_info); |
982b8810 | 369 | if (err) |
7257b535 | 370 | break; |
856081f6 | 371 | |
36ce148c | 372 | } while ((skb = skb->next)); |
cb5087ca | 373 | |
7257b535 BP |
374 | /* Free all of the segments. */ |
375 | skb = segs; | |
376 | do { | |
377 | nskb = skb->next; | |
378 | if (err) | |
379 | kfree_skb(skb); | |
380 | else | |
381 | consume_skb(skb); | |
382 | } while ((skb = nskb)); | |
383 | return err; | |
384 | } | |
385 | ||
8b7ea2d4 | 386 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
533bea51 | 387 | unsigned int hdrlen) |
0afa2373 TG |
388 | { |
389 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
533bea51 | 390 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
4e25b8c1 | 391 | + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
0afa2373 TG |
392 | |
393 | /* OVS_PACKET_ATTR_USERDATA */ | |
8b7ea2d4 WZ |
394 | if (upcall_info->userdata) |
395 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
396 | ||
397 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
398 | if (upcall_info->egress_tun_info) | |
399 | size += nla_total_size(ovs_tun_key_attr_size()); | |
0afa2373 TG |
400 | |
401 | return size; | |
402 | } | |
403 | ||
5ae440c3 | 404 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 405 | const struct sw_flow_key *key, |
7257b535 BP |
406 | const struct dp_upcall_info *upcall_info) |
407 | { | |
408 | struct ovs_header *upcall; | |
6161d3fd | 409 | struct sk_buff *nskb = NULL; |
82706a6f | 410 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
7257b535 | 411 | struct nlattr *nla; |
68eadcf0 | 412 | struct genl_info info = { |
705e9260 | 413 | #ifdef HAVE_GENLMSG_NEW_UNICAST |
5ae440c3 | 414 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
68eadcf0 TG |
415 | #endif |
416 | .snd_portid = upcall_info->portid, | |
417 | }; | |
978188b2 | 418 | size_t len; |
533bea51 | 419 | unsigned int hlen; |
5ae440c3 TG |
420 | int err, dp_ifindex; |
421 | ||
422 | dp_ifindex = get_dpifindex(dp); | |
423 | if (!dp_ifindex) | |
424 | return -ENODEV; | |
7257b535 | 425 | |
6161d3fd JG |
426 | if (vlan_tx_tag_present(skb)) { |
427 | nskb = skb_clone(skb, GFP_ATOMIC); | |
428 | if (!nskb) | |
429 | return -ENOMEM; | |
07ac71ea PS |
430 | |
431 | nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb)); | |
432 | if (!nskb) | |
433 | return -ENOMEM; | |
434 | ||
435 | vlan_set_tci(nskb, 0); | |
7257b535 | 436 | |
6161d3fd JG |
437 | skb = nskb; |
438 | } | |
439 | ||
440 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
441 | err = -EFBIG; | |
442 | goto out; | |
443 | } | |
7257b535 | 444 | |
533bea51 TG |
445 | /* Complete checksum if needed */ |
446 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
447 | (err = skb_checksum_help(skb))) | |
448 | goto out; | |
449 | ||
450 | /* Older versions of OVS user space enforce alignment of the last | |
451 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
452 | * padding logic. Only perform zerocopy if padding is not required. | |
453 | */ | |
454 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
455 | hlen = skb_zerocopy_headlen(skb); | |
456 | else | |
457 | hlen = skb->len; | |
458 | ||
8b7ea2d4 | 459 | len = upcall_msg_size(upcall_info, hlen); |
68eadcf0 | 460 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
6161d3fd JG |
461 | if (!user_skb) { |
462 | err = -ENOMEM; | |
463 | goto out; | |
464 | } | |
7257b535 BP |
465 | |
466 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
467 | 0, upcall_info->cmd); | |
468 | upcall->dp_ifindex = dp_ifindex; | |
469 | ||
470 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
e74d4817 | 471 | err = ovs_nla_put_flow(key, key, user_skb); |
9a621f82 | 472 | BUG_ON(err); |
7257b535 BP |
473 | nla_nest_end(user_skb, nla); |
474 | ||
475 | if (upcall_info->userdata) | |
e995e3df | 476 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 477 | nla_len(upcall_info->userdata), |
e995e3df | 478 | nla_data(upcall_info->userdata)); |
7257b535 | 479 | |
8b7ea2d4 WZ |
480 | if (upcall_info->egress_tun_info) { |
481 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
482 | err = ovs_nla_put_egress_tunnel_key(user_skb, | |
483 | upcall_info->egress_tun_info); | |
484 | BUG_ON(err); | |
485 | nla_nest_end(user_skb, nla); | |
486 | } | |
487 | ||
533bea51 TG |
488 | /* Only reserve room for attribute header, packet data is added |
489 | * in skb_zerocopy() */ | |
490 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
491 | err = -ENOBUFS; | |
492 | goto out; | |
493 | } | |
494 | nla->nla_len = nla_attr_size(skb->len); | |
bed53bd1 | 495 | |
2c272bd9 ZK |
496 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
497 | if (err) | |
498 | goto out; | |
7257b535 | 499 | |
ef507cec | 500 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
978188b2 JG |
501 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { |
502 | size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len; | |
503 | ||
504 | if (plen > 0) | |
505 | memset(skb_put(user_skb, plen), 0, plen); | |
506 | } | |
ef507cec | 507 | |
533bea51 | 508 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
6161d3fd | 509 | |
533bea51 | 510 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
82706a6f | 511 | user_skb = NULL; |
6161d3fd | 512 | out: |
2c272bd9 ZK |
513 | if (err) |
514 | skb_tx_error(skb); | |
82706a6f LR |
515 | |
516 | kfree_skb(user_skb); | |
6161d3fd JG |
517 | kfree_skb(nskb); |
518 | return err; | |
cb5087ca BP |
519 | } |
520 | ||
df2c07f4 | 521 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 522 | { |
df2c07f4 | 523 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 524 | struct nlattr **a = info->attrs; |
e0e57990 | 525 | struct sw_flow_actions *acts; |
982b8810 | 526 | struct sk_buff *packet; |
e0e57990 | 527 | struct sw_flow *flow; |
ad50cb60 | 528 | struct sw_flow_actions *sf_acts; |
f7cd0081 | 529 | struct datapath *dp; |
d6569377 | 530 | struct ethhdr *eth; |
a6059080 | 531 | struct vport *input_vport; |
3f19d399 | 532 | int len; |
d6569377 | 533 | int err; |
9233cef7 | 534 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
064af421 | 535 | |
f7cd0081 | 536 | err = -EINVAL; |
df2c07f4 | 537 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 538 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 539 | goto err; |
064af421 | 540 | |
df2c07f4 | 541 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 542 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
543 | err = -ENOMEM; |
544 | if (!packet) | |
e5cad958 | 545 | goto err; |
3f19d399 BP |
546 | skb_reserve(packet, NET_IP_ALIGN); |
547 | ||
bf3d6fce | 548 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 549 | |
f7cd0081 BP |
550 | skb_reset_mac_header(packet); |
551 | eth = eth_hdr(packet); | |
064af421 | 552 | |
d6569377 BP |
553 | /* Normally, setting the skb 'protocol' field would be handled by a |
554 | * call to eth_type_trans(), but it assumes there's a sending | |
555 | * device, which we may not have. */ | |
7cd46155 | 556 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
f7cd0081 | 557 | packet->protocol = eth->h_proto; |
d6569377 | 558 | else |
f7cd0081 | 559 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 560 | |
e0e57990 | 561 | /* Build an sw_flow for sending this packet. */ |
df65fec1 | 562 | flow = ovs_flow_alloc(); |
e0e57990 BP |
563 | err = PTR_ERR(flow); |
564 | if (IS_ERR(flow)) | |
e5cad958 | 565 | goto err_kfree_skb; |
064af421 | 566 | |
c135bba1 | 567 | err = ovs_flow_key_extract_userspace(a[OVS_PACKET_ATTR_KEY], packet, |
9233cef7 | 568 | &flow->key, log); |
e0e57990 | 569 | if (err) |
9321954a | 570 | goto err_flow_free; |
e0e57990 | 571 | |
a097c0b2 | 572 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
9233cef7 | 573 | &flow->key, &acts, log); |
9b405f1a PS |
574 | if (err) |
575 | goto err_flow_free; | |
e0e57990 | 576 | |
ff27161e | 577 | rcu_assign_pointer(flow->sf_acts, acts); |
800711c3 | 578 | OVS_CB(packet)->egress_tun_info = NULL; |
abff858b | 579 | packet->priority = flow->key.phy.priority; |
3025a772 | 580 | packet->mark = flow->key.phy.skb_mark; |
e0e57990 | 581 | |
d6569377 | 582 | rcu_read_lock(); |
01ac0970 | 583 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 584 | err = -ENODEV; |
e5cad958 BP |
585 | if (!dp) |
586 | goto err_unlock; | |
cc4015df | 587 | |
a6059080 AZ |
588 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
589 | if (!input_vport) | |
590 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
591 | ||
592 | if (!input_vport) | |
593 | goto err_unlock; | |
594 | ||
595 | OVS_CB(packet)->input_vport = input_vport; | |
ad50cb60 | 596 | sf_acts = rcu_dereference(flow->sf_acts); |
a6059080 | 597 | |
e9141eec | 598 | local_bh_disable(); |
e74d4817 | 599 | err = ovs_execute_actions(dp, packet, &flow->key, sf_acts); |
e9141eec | 600 | local_bh_enable(); |
d6569377 | 601 | rcu_read_unlock(); |
e0e57990 | 602 | |
a1c564be | 603 | ovs_flow_free(flow, false); |
e5cad958 | 604 | return err; |
064af421 | 605 | |
e5cad958 BP |
606 | err_unlock: |
607 | rcu_read_unlock(); | |
9321954a | 608 | err_flow_free: |
a1c564be | 609 | ovs_flow_free(flow, false); |
e5cad958 BP |
610 | err_kfree_skb: |
611 | kfree_skb(packet); | |
612 | err: | |
d6569377 | 613 | return err; |
064af421 BP |
614 | } |
615 | ||
df2c07f4 | 616 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc | 617 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
df2c07f4 JP |
618 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
619 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
620 | }; |
621 | ||
622 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 623 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
624 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
625 | .policy = packet_policy, | |
df2c07f4 | 626 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
627 | } |
628 | }; | |
629 | ||
cb25142c PS |
630 | static struct genl_family dp_packet_genl_family = { |
631 | .id = GENL_ID_GENERATE, | |
632 | .hdrsize = sizeof(struct ovs_header), | |
633 | .name = OVS_PACKET_FAMILY, | |
634 | .version = OVS_PACKET_VERSION, | |
635 | .maxattr = OVS_PACKET_ATTR_MAX, | |
636 | .netnsok = true, | |
637 | .parallel_ops = true, | |
638 | .ops = dp_packet_genl_ops, | |
639 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
640 | }; | |
641 | ||
f1f60b85 | 642 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
4fa72a95 | 643 | struct ovs_dp_megaflow_stats *mega_stats) |
064af421 | 644 | { |
d6569377 | 645 | int i; |
f180c2e2 | 646 | |
4fa72a95 AZ |
647 | memset(mega_stats, 0, sizeof(*mega_stats)); |
648 | ||
994dc286 | 649 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
4fa72a95 | 650 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
064af421 | 651 | |
7257b535 | 652 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
4fa72a95 | 653 | |
d6569377 BP |
654 | for_each_possible_cpu(i) { |
655 | const struct dp_stats_percpu *percpu_stats; | |
656 | struct dp_stats_percpu local_stats; | |
821cb9fa | 657 | unsigned int start; |
44e05eca | 658 | |
d6569377 | 659 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 660 | |
d6569377 | 661 | do { |
b81deb15 | 662 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
d6569377 | 663 | local_stats = *percpu_stats; |
b81deb15 | 664 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
064af421 | 665 | |
d6569377 BP |
666 | stats->n_hit += local_stats.n_hit; |
667 | stats->n_missed += local_stats.n_missed; | |
668 | stats->n_lost += local_stats.n_lost; | |
4fa72a95 | 669 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
d6569377 BP |
670 | } |
671 | } | |
064af421 | 672 | |
0afa2373 TG |
673 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
674 | { | |
675 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
4e25b8c1 JS |
676 | + nla_total_size(ovs_key_attr_size()) /* OVS_FLOW_ATTR_KEY */ |
677 | + nla_total_size(ovs_key_attr_size()) /* OVS_FLOW_ATTR_MASK */ | |
0afa2373 TG |
678 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
679 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
680 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
681 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
682 | } | |
683 | ||
aa917006 | 684 | /* Called with ovs_mutex or RCU read lock. */ |
2c622e5a | 685 | static int ovs_flow_cmd_fill_match(const struct sw_flow *flow, |
f1948bb9 | 686 | struct sk_buff *skb) |
d6569377 | 687 | { |
d6569377 | 688 | struct nlattr *nla; |
d6569377 | 689 | int err; |
064af421 | 690 | |
a1c564be | 691 | /* Fill flow key. */ |
df2c07f4 | 692 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 | 693 | if (!nla) |
f1948bb9 | 694 | return -EMSGSIZE; |
a1c564be | 695 | |
2c622e5a | 696 | err = ovs_nla_put_flow(&flow->unmasked_key, |
c1fc1411 | 697 | &flow->unmasked_key, skb); |
d6569377 | 698 | if (err) |
f1948bb9 | 699 | return err; |
d6569377 BP |
700 | nla_nest_end(skb, nla); |
701 | ||
f1948bb9 | 702 | /* Fill flow mask. */ |
a1c564be AZ |
703 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); |
704 | if (!nla) | |
f1948bb9 | 705 | return -EMSGSIZE; |
a1c564be | 706 | |
2c622e5a | 707 | err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb); |
a1c564be | 708 | if (err) |
f1948bb9 | 709 | return err; |
a1c564be AZ |
710 | nla_nest_end(skb, nla); |
711 | ||
f1948bb9 JS |
712 | return 0; |
713 | } | |
714 | ||
715 | /* Called with ovs_mutex or RCU read lock. */ | |
716 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
717 | struct sk_buff *skb) | |
718 | { | |
719 | struct ovs_flow_stats stats; | |
720 | __be16 tcp_flags; | |
721 | unsigned long used; | |
722 | ||
b0f3a2fe | 723 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
f71db6b1 | 724 | |
b0f3a2fe PS |
725 | if (used && |
726 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
f1948bb9 | 727 | return -EMSGSIZE; |
d6569377 | 728 | |
b0f3a2fe PS |
729 | if (stats.n_packets && |
730 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) | |
f1948bb9 | 731 | return -EMSGSIZE; |
b0b906cc | 732 | |
b0f3a2fe PS |
733 | if ((u8)ntohs(tcp_flags) && |
734 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
f1948bb9 JS |
735 | return -EMSGSIZE; |
736 | ||
737 | return 0; | |
738 | } | |
739 | ||
740 | /* Called with ovs_mutex or RCU read lock. */ | |
741 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
742 | struct sk_buff *skb, int skb_orig_len) | |
743 | { | |
744 | struct nlattr *start; | |
745 | int err; | |
d6569377 | 746 | |
df2c07f4 | 747 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
748 | * this is the first flow to be dumped into 'skb'. This is unusual for |
749 | * Netlink but individual action lists can be longer than | |
750 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
751 | * The userspace caller can always fetch the actions separately if it | |
752 | * really wants them. (Most userspace callers in fact don't care.) | |
753 | * | |
754 | * This can only fail for dump operations because the skb is always | |
755 | * properly sized for single flows. | |
756 | */ | |
9b405f1a | 757 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 758 | if (start) { |
f44ccce1 PS |
759 | const struct sw_flow_actions *sf_acts; |
760 | ||
780ec6ae | 761 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
a097c0b2 PS |
762 | err = ovs_nla_put_actions(sf_acts->actions, |
763 | sf_acts->actions_len, skb); | |
f71db6b1 | 764 | |
0a25b039 BP |
765 | if (!err) |
766 | nla_nest_end(skb, start); | |
767 | else { | |
768 | if (skb_orig_len) | |
f1948bb9 | 769 | return err; |
0a25b039 BP |
770 | |
771 | nla_nest_cancel(skb, start); | |
772 | } | |
f1948bb9 JS |
773 | } else if (skb_orig_len) { |
774 | return -EMSGSIZE; | |
775 | } | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
780 | /* Called with ovs_mutex or RCU read lock. */ | |
2c622e5a | 781 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
f1948bb9 JS |
782 | struct sk_buff *skb, u32 portid, |
783 | u32 seq, u32 flags, u8 cmd) | |
784 | { | |
785 | const int skb_orig_len = skb->len; | |
786 | struct ovs_header *ovs_header; | |
787 | int err; | |
788 | ||
789 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); | |
790 | if (!ovs_header) | |
791 | return -EMSGSIZE; | |
792 | ovs_header->dp_ifindex = dp_ifindex; | |
793 | ||
2c622e5a | 794 | err = ovs_flow_cmd_fill_match(flow, skb); |
f1948bb9 JS |
795 | if (err) |
796 | goto error; | |
797 | ||
798 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
799 | if (err) | |
800 | goto error; | |
801 | ||
802 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
803 | if (err) | |
804 | goto error; | |
37a1300c | 805 | |
df2c07f4 | 806 | return genlmsg_end(skb, ovs_header); |
d6569377 | 807 | |
37a1300c | 808 | error: |
df2c07f4 | 809 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 810 | return err; |
44e05eca BP |
811 | } |
812 | ||
f71db6b1 JR |
813 | /* May not be called with RCU read lock. */ |
814 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
afad3556 JR |
815 | struct genl_info *info, |
816 | bool always) | |
44e05eca | 817 | { |
afad3556 | 818 | struct sk_buff *skb; |
d6569377 | 819 | |
114fce23 SG |
820 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, |
821 | GROUP_ID(&ovs_dp_flow_multicast_group))) | |
afad3556 JR |
822 | return NULL; |
823 | ||
f71db6b1 | 824 | skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL); |
afad3556 JR |
825 | |
826 | if (!skb) | |
827 | return ERR_PTR(-ENOMEM); | |
828 | ||
829 | return skb; | |
37a1300c | 830 | } |
8d5ebd83 | 831 | |
f71db6b1 | 832 | /* Called with ovs_mutex. */ |
c1fc1411 JG |
833 | static struct sk_buff *ovs_flow_cmd_build_info(struct datapath *dp, |
834 | const struct sw_flow *flow, | |
f71db6b1 JR |
835 | int dp_ifindex, |
836 | struct genl_info *info, u8 cmd, | |
837 | bool always) | |
37a1300c BP |
838 | { |
839 | struct sk_buff *skb; | |
840 | int retval; | |
d6569377 | 841 | |
f71db6b1 JR |
842 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info, |
843 | always); | |
a6ddcc9a | 844 | if (IS_ERR_OR_NULL(skb)) |
afad3556 | 845 | return skb; |
d6569377 | 846 | |
2c622e5a | 847 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
f71db6b1 JR |
848 | info->snd_portid, info->snd_seq, 0, |
849 | cmd); | |
37a1300c | 850 | BUG_ON(retval < 0); |
d6569377 | 851 | return skb; |
064af421 BP |
852 | } |
853 | ||
0c9fd022 | 854 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
064af421 | 855 | { |
37a1300c | 856 | struct nlattr **a = info->attrs; |
df2c07f4 | 857 | struct ovs_header *ovs_header = info->userhdr; |
6740b721 | 858 | struct sw_flow *flow, *new_flow; |
a1c564be | 859 | struct sw_flow_mask mask; |
37a1300c | 860 | struct sk_buff *reply; |
9c52546b | 861 | struct datapath *dp; |
0c9fd022 | 862 | struct sw_flow_actions *acts; |
a1c564be | 863 | struct sw_flow_match match; |
bc4a05c6 | 864 | int error; |
9233cef7 | 865 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
064af421 | 866 | |
6740b721 | 867 | /* Must have key and actions. */ |
37a1300c | 868 | error = -EINVAL; |
a473df5b | 869 | if (!a[OVS_FLOW_ATTR_KEY]) { |
9233cef7 | 870 | OVS_NLERR(log, "Flow key attribute not present in new flow."); |
37a1300c | 871 | goto error; |
a473df5b JG |
872 | } |
873 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
9233cef7 JR |
874 | OVS_NLERR(log, |
875 | "Flow actions attribute not present in new flow."); | |
6740b721 | 876 | goto error; |
a473df5b | 877 | } |
a1c564be | 878 | |
6740b721 JR |
879 | /* Most of the time we need to allocate a new flow, do it before |
880 | * locking. */ | |
881 | new_flow = ovs_flow_alloc(); | |
882 | if (IS_ERR(new_flow)) { | |
883 | error = PTR_ERR(new_flow); | |
884 | goto error; | |
885 | } | |
886 | ||
887 | /* Extract key. */ | |
888 | ovs_match_init(&match, &new_flow->unmasked_key, &mask); | |
9233cef7 JR |
889 | error = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], |
890 | a[OVS_FLOW_ATTR_MASK], log); | |
37a1300c | 891 | if (error) |
6740b721 | 892 | goto err_kfree_flow; |
064af421 | 893 | |
6740b721 | 894 | ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask); |
9b405f1a | 895 | |
6740b721 | 896 | /* Validate actions. */ |
6740b721 | 897 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key, |
9233cef7 | 898 | &acts, log); |
0c9fd022 | 899 | if (error) { |
9233cef7 JR |
900 | OVS_NLERR( |
901 | log, | |
902 | "Flow actions may not be safe on all matching packets." | |
903 | ); | |
4f67b12a | 904 | goto err_kfree_flow; |
6740b721 JR |
905 | } |
906 | ||
907 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
908 | if (IS_ERR(reply)) { | |
909 | error = PTR_ERR(reply); | |
910 | goto err_kfree_acts; | |
37a1300c BP |
911 | } |
912 | ||
cd2a59e9 | 913 | ovs_lock(); |
2a4999f3 | 914 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
6740b721 JR |
915 | if (unlikely(!dp)) { |
916 | error = -ENODEV; | |
cd2a59e9 | 917 | goto err_unlock_ovs; |
6740b721 | 918 | } |
a1c564be | 919 | /* Check if this is a duplicate flow */ |
6740b721 JR |
920 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key); |
921 | if (likely(!flow)) { | |
922 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
d6569377 | 923 | |
d6569377 | 924 | /* Put flow in bucket. */ |
6740b721 JR |
925 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
926 | if (unlikely(error)) { | |
0585f7a8 | 927 | acts = NULL; |
6740b721 JR |
928 | goto err_unlock_ovs; |
929 | } | |
930 | ||
931 | if (unlikely(reply)) { | |
2c622e5a | 932 | error = ovs_flow_cmd_fill_info(new_flow, |
6740b721 JR |
933 | ovs_header->dp_ifindex, |
934 | reply, info->snd_portid, | |
935 | info->snd_seq, 0, | |
936 | OVS_FLOW_CMD_NEW); | |
937 | BUG_ON(error < 0); | |
0585f7a8 | 938 | } |
6740b721 | 939 | ovs_unlock(); |
d6569377 | 940 | } else { |
0c9fd022 JR |
941 | struct sw_flow_actions *old_acts; |
942 | ||
d6569377 BP |
943 | /* Bail out if we're not allowed to modify an existing flow. |
944 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
945 | * because Generic Netlink treats the latter as a dump | |
946 | * request. We also accept NLM_F_EXCL in case that bug ever | |
947 | * gets fixed. | |
948 | */ | |
6740b721 JR |
949 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
950 | | NLM_F_EXCL))) { | |
951 | error = -EEXIST; | |
cd2a59e9 | 952 | goto err_unlock_ovs; |
6740b721 | 953 | } |
b21e5b6a | 954 | /* The unmasked key has to be the same for flow updates. */ |
6740b721 | 955 | if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) { |
3440e4bc AW |
956 | /* Look for any overlapping flow. */ |
957 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
958 | if (!flow) { | |
959 | error = -ENOENT; | |
960 | goto err_unlock_ovs; | |
961 | } | |
6740b721 | 962 | } |
0c9fd022 JR |
963 | /* Update actions. */ |
964 | old_acts = ovsl_dereference(flow->sf_acts); | |
965 | rcu_assign_pointer(flow->sf_acts, acts); | |
0c9fd022 | 966 | |
6740b721 | 967 | if (unlikely(reply)) { |
2c622e5a | 968 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
969 | ovs_header->dp_ifindex, |
970 | reply, info->snd_portid, | |
971 | info->snd_seq, 0, | |
972 | OVS_FLOW_CMD_NEW); | |
973 | BUG_ON(error < 0); | |
974 | } | |
975 | ovs_unlock(); | |
0c9fd022 | 976 | |
6740b721 JR |
977 | ovs_nla_free_flow_actions(old_acts); |
978 | ovs_flow_free(new_flow, false); | |
0c9fd022 | 979 | } |
6740b721 JR |
980 | |
981 | if (reply) | |
cb25142c | 982 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
0c9fd022 JR |
983 | return 0; |
984 | ||
0c9fd022 JR |
985 | err_unlock_ovs: |
986 | ovs_unlock(); | |
6740b721 JR |
987 | kfree_skb(reply); |
988 | err_kfree_acts: | |
0c9fd022 | 989 | kfree(acts); |
6740b721 JR |
990 | err_kfree_flow: |
991 | ovs_flow_free(new_flow, false); | |
0c9fd022 JR |
992 | error: |
993 | return error; | |
994 | } | |
995 | ||
cc561abf PS |
996 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
997 | static struct sw_flow_actions *get_flow_actions(const struct nlattr *a, | |
998 | const struct sw_flow_key *key, | |
9233cef7 JR |
999 | const struct sw_flow_mask *mask, |
1000 | bool log) | |
cc561abf PS |
1001 | { |
1002 | struct sw_flow_actions *acts; | |
1003 | struct sw_flow_key masked_key; | |
1004 | int error; | |
1005 | ||
1006 | ovs_flow_mask_key(&masked_key, key, mask); | |
9233cef7 | 1007 | error = ovs_nla_copy_actions(a, &masked_key, &acts, log); |
cc561abf | 1008 | if (error) { |
9233cef7 JR |
1009 | OVS_NLERR(log, |
1010 | "Actions may not be safe on all matching packets."); | |
cc561abf PS |
1011 | return ERR_PTR(error); |
1012 | } | |
1013 | ||
1014 | return acts; | |
1015 | } | |
1016 | ||
0c9fd022 JR |
1017 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1018 | { | |
1019 | struct nlattr **a = info->attrs; | |
1020 | struct ovs_header *ovs_header = info->userhdr; | |
1d2a1b5f | 1021 | struct sw_flow_key key; |
0c9fd022 JR |
1022 | struct sw_flow *flow; |
1023 | struct sw_flow_mask mask; | |
1024 | struct sk_buff *reply = NULL; | |
1025 | struct datapath *dp; | |
6740b721 | 1026 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
0c9fd022 JR |
1027 | struct sw_flow_match match; |
1028 | int error; | |
9233cef7 | 1029 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
0c9fd022 JR |
1030 | |
1031 | /* Extract key. */ | |
1032 | error = -EINVAL; | |
a473df5b | 1033 | if (!a[OVS_FLOW_ATTR_KEY]) { |
9233cef7 | 1034 | OVS_NLERR(log, "Flow key attribute not present in set flow."); |
0c9fd022 | 1035 | goto error; |
a473df5b | 1036 | } |
0c9fd022 JR |
1037 | |
1038 | ovs_match_init(&match, &key, &mask); | |
9233cef7 JR |
1039 | error = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], |
1040 | a[OVS_FLOW_ATTR_MASK], log); | |
0c9fd022 JR |
1041 | if (error) |
1042 | goto error; | |
d6569377 | 1043 | |
0c9fd022 JR |
1044 | /* Validate actions. */ |
1045 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
9233cef7 JR |
1046 | acts = get_flow_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, &mask, |
1047 | log); | |
cc561abf PS |
1048 | if (IS_ERR(acts)) { |
1049 | error = PTR_ERR(acts); | |
0c9fd022 | 1050 | goto error; |
6740b721 | 1051 | } |
6740b721 | 1052 | |
ff27161e | 1053 | /* Can allocate before locking if have acts. */ |
6740b721 JR |
1054 | reply = ovs_flow_cmd_alloc_info(acts, info, false); |
1055 | if (IS_ERR(reply)) { | |
1056 | error = PTR_ERR(reply); | |
1057 | goto err_kfree_acts; | |
90b8c2f7 | 1058 | } |
0c9fd022 JR |
1059 | } |
1060 | ||
1061 | ovs_lock(); | |
1062 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
6740b721 JR |
1063 | if (unlikely(!dp)) { |
1064 | error = -ENODEV; | |
0c9fd022 | 1065 | goto err_unlock_ovs; |
6740b721 | 1066 | } |
0c9fd022 | 1067 | /* Check that the flow exists. */ |
3440e4bc | 1068 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
6740b721 JR |
1069 | if (unlikely(!flow)) { |
1070 | error = -ENOENT; | |
0c9fd022 | 1071 | goto err_unlock_ovs; |
6740b721 | 1072 | } |
3440e4bc | 1073 | |
0c9fd022 | 1074 | /* Update actions, if present. */ |
6740b721 | 1075 | if (likely(acts)) { |
0c9fd022 JR |
1076 | old_acts = ovsl_dereference(flow->sf_acts); |
1077 | rcu_assign_pointer(flow->sf_acts, acts); | |
6740b721 JR |
1078 | |
1079 | if (unlikely(reply)) { | |
2c622e5a | 1080 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1081 | ovs_header->dp_ifindex, |
1082 | reply, info->snd_portid, | |
1083 | info->snd_seq, 0, | |
1084 | OVS_FLOW_CMD_NEW); | |
1085 | BUG_ON(error < 0); | |
1086 | } | |
1087 | } else { | |
1088 | /* Could not alloc without acts before locking. */ | |
c1fc1411 JG |
1089 | reply = ovs_flow_cmd_build_info(dp, flow, |
1090 | ovs_header->dp_ifindex, | |
6740b721 JR |
1091 | info, OVS_FLOW_CMD_NEW, false); |
1092 | if (unlikely(IS_ERR(reply))) { | |
1093 | error = PTR_ERR(reply); | |
1094 | goto err_unlock_ovs; | |
1095 | } | |
9c52546b | 1096 | } |
0c9fd022 | 1097 | |
0c9fd022 JR |
1098 | /* Clear stats. */ |
1099 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1100 | ovs_flow_stats_clear(flow); | |
cd2a59e9 | 1101 | ovs_unlock(); |
37a1300c | 1102 | |
6740b721 | 1103 | if (reply) |
cb25142c | 1104 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
6740b721 JR |
1105 | if (old_acts) |
1106 | ovs_nla_free_flow_actions(old_acts); | |
d6569377 | 1107 | return 0; |
704a1e09 | 1108 | |
cd2a59e9 PS |
1109 | err_unlock_ovs: |
1110 | ovs_unlock(); | |
6740b721 JR |
1111 | kfree_skb(reply); |
1112 | err_kfree_acts: | |
ba400435 | 1113 | kfree(acts); |
37a1300c | 1114 | error: |
9c52546b | 1115 | return error; |
704a1e09 BP |
1116 | } |
1117 | ||
df2c07f4 | 1118 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1119 | { |
37a1300c | 1120 | struct nlattr **a = info->attrs; |
df2c07f4 | 1121 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1122 | struct sw_flow_key key; |
37a1300c | 1123 | struct sk_buff *reply; |
704a1e09 | 1124 | struct sw_flow *flow; |
9c52546b | 1125 | struct datapath *dp; |
a1c564be | 1126 | struct sw_flow_match match; |
9c52546b | 1127 | int err; |
9233cef7 | 1128 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
704a1e09 | 1129 | |
1b936472 | 1130 | if (!a[OVS_FLOW_ATTR_KEY]) { |
9233cef7 JR |
1131 | OVS_NLERR(log, |
1132 | "Flow get message rejected, Key attribute missing."); | |
37a1300c | 1133 | return -EINVAL; |
1b936472 | 1134 | } |
a1c564be AZ |
1135 | |
1136 | ovs_match_init(&match, &key, NULL); | |
9233cef7 | 1137 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL, log); |
37a1300c BP |
1138 | if (err) |
1139 | return err; | |
704a1e09 | 1140 | |
cd2a59e9 | 1141 | ovs_lock(); |
2a4999f3 | 1142 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1143 | if (!dp) { |
1144 | err = -ENODEV; | |
1145 | goto unlock; | |
1146 | } | |
704a1e09 | 1147 | |
3440e4bc AW |
1148 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1149 | if (!flow) { | |
cd2a59e9 PS |
1150 | err = -ENOENT; |
1151 | goto unlock; | |
1152 | } | |
d6569377 | 1153 | |
c1fc1411 | 1154 | reply = ovs_flow_cmd_build_info(dp, flow, ovs_header->dp_ifindex, info, |
f71db6b1 | 1155 | OVS_FLOW_CMD_NEW, true); |
cd2a59e9 PS |
1156 | if (IS_ERR(reply)) { |
1157 | err = PTR_ERR(reply); | |
1158 | goto unlock; | |
1159 | } | |
36956a7d | 1160 | |
cd2a59e9 | 1161 | ovs_unlock(); |
37a1300c | 1162 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1163 | unlock: |
1164 | ovs_unlock(); | |
1165 | return err; | |
d6569377 | 1166 | } |
9c52546b | 1167 | |
df2c07f4 | 1168 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1169 | { |
37a1300c | 1170 | struct nlattr **a = info->attrs; |
df2c07f4 | 1171 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1172 | struct sw_flow_key key; |
37a1300c | 1173 | struct sk_buff *reply; |
d6569377 | 1174 | struct sw_flow *flow; |
d6569377 | 1175 | struct datapath *dp; |
a1c564be | 1176 | struct sw_flow_match match; |
d6569377 | 1177 | int err; |
9233cef7 | 1178 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
36956a7d | 1179 | |
cde7f3ba JR |
1180 | if (likely(a[OVS_FLOW_ATTR_KEY])) { |
1181 | ovs_match_init(&match, &key, NULL); | |
9233cef7 JR |
1182 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL, |
1183 | log); | |
cde7f3ba JR |
1184 | if (unlikely(err)) |
1185 | return err; | |
1186 | } | |
1187 | ||
cd2a59e9 | 1188 | ovs_lock(); |
2a4999f3 | 1189 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cde7f3ba | 1190 | if (unlikely(!dp)) { |
cd2a59e9 PS |
1191 | err = -ENODEV; |
1192 | goto unlock; | |
1193 | } | |
cde7f3ba | 1194 | if (unlikely(!a[OVS_FLOW_ATTR_KEY])) { |
994dc286 | 1195 | err = ovs_flow_tbl_flush(&dp->table); |
cd2a59e9 PS |
1196 | goto unlock; |
1197 | } | |
3440e4bc AW |
1198 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1199 | if (unlikely(!flow)) { | |
cd2a59e9 PS |
1200 | err = -ENOENT; |
1201 | goto unlock; | |
1202 | } | |
d6569377 | 1203 | |
994dc286 | 1204 | ovs_flow_tbl_remove(&dp->table, flow); |
cde7f3ba | 1205 | ovs_unlock(); |
37a1300c | 1206 | |
46051cf8 | 1207 | reply = ovs_flow_cmd_alloc_info(rcu_dereference_raw(flow->sf_acts), |
cde7f3ba JR |
1208 | info, false); |
1209 | ||
1210 | if (likely(reply)) { | |
1211 | if (likely(!IS_ERR(reply))) { | |
1212 | rcu_read_lock(); /* Keep RCU checker happy. */ | |
2c622e5a | 1213 | err = ovs_flow_cmd_fill_info(flow, |
cde7f3ba JR |
1214 | ovs_header->dp_ifindex, |
1215 | reply, info->snd_portid, | |
1216 | info->snd_seq, 0, | |
1217 | OVS_FLOW_CMD_DEL); | |
1218 | rcu_read_unlock(); | |
1219 | BUG_ON(err < 0); | |
cb25142c | 1220 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
cde7f3ba | 1221 | } else { |
cb25142c PS |
1222 | genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0, |
1223 | GROUP_ID(&ovs_dp_flow_multicast_group), PTR_ERR(reply)); | |
1224 | ||
cde7f3ba | 1225 | } |
afad3556 | 1226 | } |
37a1300c | 1227 | |
a1c564be | 1228 | ovs_flow_free(flow, true); |
37a1300c | 1229 | return 0; |
cd2a59e9 PS |
1230 | unlock: |
1231 | ovs_unlock(); | |
1232 | return err; | |
37a1300c BP |
1233 | } |
1234 | ||
df2c07f4 | 1235 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1236 | { |
df2c07f4 | 1237 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
994dc286 | 1238 | struct table_instance *ti; |
37a1300c BP |
1239 | struct datapath *dp; |
1240 | ||
f44ccce1 | 1241 | rcu_read_lock(); |
01ac0970 | 1242 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 1243 | if (!dp) { |
f44ccce1 | 1244 | rcu_read_unlock(); |
37a1300c | 1245 | return -ENODEV; |
cd2a59e9 | 1246 | } |
37a1300c | 1247 | |
994dc286 | 1248 | ti = rcu_dereference(dp->table.ti); |
37a1300c | 1249 | for (;;) { |
37a1300c BP |
1250 | struct sw_flow *flow; |
1251 | u32 bucket, obj; | |
1252 | ||
1253 | bucket = cb->args[0]; | |
1254 | obj = cb->args[1]; | |
994dc286 | 1255 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
3544358a | 1256 | if (!flow) |
37a1300c BP |
1257 | break; |
1258 | ||
2c622e5a | 1259 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
28aea917 | 1260 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1261 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1262 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1263 | break; |
1264 | ||
1265 | cb->args[0] = bucket; | |
1266 | cb->args[1] = obj; | |
1267 | } | |
f44ccce1 | 1268 | rcu_read_unlock(); |
37a1300c | 1269 | return skb->len; |
704a1e09 BP |
1270 | } |
1271 | ||
cb25142c PS |
1272 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1273 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
9233cef7 | 1274 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
cb25142c PS |
1275 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1276 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
9233cef7 | 1277 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
cb25142c PS |
1278 | }; |
1279 | ||
37a1300c | 1280 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1281 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1282 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1283 | .policy = flow_policy, | |
0c9fd022 | 1284 | .doit = ovs_flow_cmd_new |
37a1300c | 1285 | }, |
df2c07f4 | 1286 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1287 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1288 | .policy = flow_policy, | |
df2c07f4 | 1289 | .doit = ovs_flow_cmd_del |
37a1300c | 1290 | }, |
df2c07f4 | 1291 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1292 | .flags = 0, /* OK for unprivileged users. */ |
1293 | .policy = flow_policy, | |
df2c07f4 JP |
1294 | .doit = ovs_flow_cmd_get, |
1295 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1296 | }, |
df2c07f4 | 1297 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1298 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1299 | .policy = flow_policy, | |
0c9fd022 | 1300 | .doit = ovs_flow_cmd_set, |
37a1300c BP |
1301 | }, |
1302 | }; | |
1303 | ||
cb25142c | 1304 | static struct genl_family dp_flow_genl_family = { |
aaff4b55 | 1305 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1306 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1307 | .name = OVS_FLOW_FAMILY, |
1308 | .version = OVS_FLOW_VERSION, | |
1309 | .maxattr = OVS_FLOW_ATTR_MAX, | |
b3dcb73c | 1310 | .netnsok = true, |
cb25142c PS |
1311 | .parallel_ops = true, |
1312 | .ops = dp_flow_genl_ops, | |
1313 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1314 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1315 | .n_mcgrps = 1, | |
aaff4b55 BP |
1316 | }; |
1317 | ||
0afa2373 TG |
1318 | static size_t ovs_dp_cmd_msg_size(void) |
1319 | { | |
1320 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1321 | ||
1322 | msgsize += nla_total_size(IFNAMSIZ); | |
1323 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
4fa72a95 | 1324 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
300af20a | 1325 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
0afa2373 TG |
1326 | |
1327 | return msgsize; | |
1328 | } | |
1329 | ||
aa917006 | 1330 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1331 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1332 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1333 | { |
df2c07f4 | 1334 | struct ovs_header *ovs_header; |
e926dfe3 | 1335 | struct ovs_dp_stats dp_stats; |
4fa72a95 | 1336 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
064af421 BP |
1337 | int err; |
1338 | ||
28aea917 | 1339 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1340 | flags, cmd); |
df2c07f4 | 1341 | if (!ovs_header) |
aaff4b55 | 1342 | goto error; |
064af421 | 1343 | |
b063d9f0 | 1344 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1345 | |
850b6b3b | 1346 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
064af421 | 1347 | if (err) |
d6569377 | 1348 | goto nla_put_failure; |
064af421 | 1349 | |
4fa72a95 AZ |
1350 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1351 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1352 | &dp_stats)) | |
1353 | goto nla_put_failure; | |
1354 | ||
1355 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1356 | sizeof(struct ovs_dp_megaflow_stats), | |
1357 | &dp_megaflow_stats)) | |
c3cc8c03 | 1358 | goto nla_put_failure; |
d6569377 | 1359 | |
c58cc9a4 TG |
1360 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1361 | goto nla_put_failure; | |
1362 | ||
df2c07f4 | 1363 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1364 | |
1365 | nla_put_failure: | |
df2c07f4 | 1366 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1367 | error: |
1368 | return -EMSGSIZE; | |
d6569377 BP |
1369 | } |
1370 | ||
d81eef1b | 1371 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
d6569377 | 1372 | { |
d81eef1b | 1373 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
aaff4b55 | 1374 | } |
9dca7bd5 | 1375 | |
aa917006 | 1376 | /* Called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 1377 | static struct datapath *lookup_datapath(struct net *net, |
f1f60b85 | 1378 | const struct ovs_header *ovs_header, |
6455100f | 1379 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1380 | { |
254f2dc8 BP |
1381 | struct datapath *dp; |
1382 | ||
df2c07f4 | 1383 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1384 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1385 | else { |
d6569377 | 1386 | struct vport *vport; |
d6569377 | 1387 | |
2a4999f3 | 1388 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1389 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
d6569377 | 1390 | } |
254f2dc8 | 1391 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1392 | } |
1393 | ||
94358dcf TG |
1394 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1395 | { | |
1396 | struct datapath *dp; | |
1397 | ||
1398 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
09350a3d | 1399 | if (IS_ERR(dp)) |
94358dcf TG |
1400 | return; |
1401 | ||
1402 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1403 | dp->user_features = 0; | |
1404 | } | |
1405 | ||
f1f60b85 | 1406 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
c58cc9a4 TG |
1407 | { |
1408 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1409 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1410 | } | |
1411 | ||
df2c07f4 | 1412 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1413 | { |
aaff4b55 | 1414 | struct nlattr **a = info->attrs; |
d6569377 | 1415 | struct vport_parms parms; |
aaff4b55 | 1416 | struct sk_buff *reply; |
d6569377 BP |
1417 | struct datapath *dp; |
1418 | struct vport *vport; | |
2a4999f3 | 1419 | struct ovs_net *ovs_net; |
95b1d73a | 1420 | int err, i; |
d6569377 | 1421 | |
d6569377 | 1422 | err = -EINVAL; |
ea36840f | 1423 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1424 | goto err; |
1425 | ||
d81eef1b JR |
1426 | reply = ovs_dp_cmd_alloc_info(info); |
1427 | if (!reply) | |
1428 | return -ENOMEM; | |
d6569377 | 1429 | |
d6569377 BP |
1430 | err = -ENOMEM; |
1431 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1432 | if (dp == NULL) | |
d81eef1b | 1433 | goto err_free_reply; |
2a4999f3 | 1434 | |
0ceaa66c JG |
1435 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1436 | ||
d6569377 | 1437 | /* Allocate table. */ |
994dc286 PS |
1438 | err = ovs_flow_tbl_init(&dp->table); |
1439 | if (err) | |
d6569377 BP |
1440 | goto err_free_dp; |
1441 | ||
08fb1bbd | 1442 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
99769a40 JG |
1443 | if (!dp->stats_percpu) { |
1444 | err = -ENOMEM; | |
1445 | goto err_destroy_table; | |
1446 | } | |
1447 | ||
95b1d73a PS |
1448 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1449 | GFP_KERNEL); | |
1450 | if (!dp->ports) { | |
1451 | err = -ENOMEM; | |
1452 | goto err_destroy_percpu; | |
1453 | } | |
1454 | ||
1455 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1456 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1457 | ||
d6569377 | 1458 | /* Set up our datapath device. */ |
df2c07f4 JP |
1459 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1460 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1461 | parms.options = NULL; |
1462 | parms.dp = dp; | |
df2c07f4 | 1463 | parms.port_no = OVSP_LOCAL; |
beb1c69a | 1464 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
b063d9f0 | 1465 | |
c58cc9a4 TG |
1466 | ovs_dp_change(dp, a); |
1467 | ||
d81eef1b JR |
1468 | /* So far only local changes have been made, now need the lock. */ |
1469 | ovs_lock(); | |
1470 | ||
d6569377 BP |
1471 | vport = new_vport(&parms); |
1472 | if (IS_ERR(vport)) { | |
1473 | err = PTR_ERR(vport); | |
1474 | if (err == -EBUSY) | |
1475 | err = -EEXIST; | |
1476 | ||
94358dcf TG |
1477 | if (err == -EEXIST) { |
1478 | /* An outdated user space instance that does not understand | |
1479 | * the concept of user_features has attempted to create a new | |
1480 | * datapath and is likely to reuse it. Drop all user features. | |
1481 | */ | |
1482 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1483 | ovs_dp_reset_user_features(skb, info); | |
1484 | } | |
1485 | ||
95b1d73a | 1486 | goto err_destroy_ports_array; |
d6569377 | 1487 | } |
d6569377 | 1488 | |
d81eef1b JR |
1489 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1490 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1491 | BUG_ON(err < 0); | |
aaff4b55 | 1492 | |
2a4999f3 | 1493 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1494 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
d6569377 | 1495 | |
cd2a59e9 | 1496 | ovs_unlock(); |
d6569377 | 1497 | |
cb25142c | 1498 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
d6569377 BP |
1499 | return 0; |
1500 | ||
95b1d73a | 1501 | err_destroy_ports_array: |
d81eef1b | 1502 | ovs_unlock(); |
95b1d73a | 1503 | kfree(dp->ports); |
99769a40 JG |
1504 | err_destroy_percpu: |
1505 | free_percpu(dp->stats_percpu); | |
d6569377 | 1506 | err_destroy_table: |
e379e4d1 | 1507 | ovs_flow_tbl_destroy(&dp->table); |
d6569377 | 1508 | err_free_dp: |
0ceaa66c | 1509 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1510 | kfree(dp); |
d81eef1b JR |
1511 | err_free_reply: |
1512 | kfree_skb(reply); | |
d6569377 | 1513 | err: |
064af421 BP |
1514 | return err; |
1515 | } | |
1516 | ||
cd2a59e9 | 1517 | /* Called with ovs_mutex. */ |
2a4999f3 | 1518 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1519 | { |
95b1d73a | 1520 | int i; |
44e05eca | 1521 | |
95b1d73a PS |
1522 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1523 | struct vport *vport; | |
f8dfbcb7 | 1524 | struct hlist_node *n; |
95b1d73a | 1525 | |
f8dfbcb7 | 1526 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1527 | if (vport->port_no != OVSP_LOCAL) |
1528 | ovs_dp_detach_port(vport); | |
1529 | } | |
ed099e92 | 1530 | |
fb93e9aa | 1531 | list_del_rcu(&dp->list_node); |
ed099e92 | 1532 | |
cd2a59e9 | 1533 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
d103f479 AZ |
1534 | * all ports in datapath are destroyed first before freeing datapath. |
1535 | */ | |
cd2a59e9 | 1536 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
99620d2c | 1537 | |
d103f479 | 1538 | /* RCU destroy the flow table */ |
ed099e92 | 1539 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1540 | } |
1541 | ||
1542 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1543 | { | |
1544 | struct sk_buff *reply; | |
1545 | struct datapath *dp; | |
1546 | int err; | |
1547 | ||
d81eef1b JR |
1548 | reply = ovs_dp_cmd_alloc_info(info); |
1549 | if (!reply) | |
1550 | return -ENOMEM; | |
1551 | ||
cd2a59e9 | 1552 | ovs_lock(); |
2a4999f3 PS |
1553 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1554 | err = PTR_ERR(dp); | |
1555 | if (IS_ERR(dp)) | |
d81eef1b | 1556 | goto err_unlock_free; |
2a4999f3 | 1557 | |
d81eef1b JR |
1558 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1559 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1560 | BUG_ON(err < 0); | |
2a4999f3 PS |
1561 | |
1562 | __dp_destroy(dp); | |
ed099e92 | 1563 | |
d81eef1b | 1564 | ovs_unlock(); |
cb25142c | 1565 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
99620d2c | 1566 | return 0; |
d81eef1b JR |
1567 | |
1568 | err_unlock_free: | |
cd2a59e9 | 1569 | ovs_unlock(); |
d81eef1b | 1570 | kfree_skb(reply); |
cd2a59e9 | 1571 | return err; |
44e05eca BP |
1572 | } |
1573 | ||
df2c07f4 | 1574 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1575 | { |
aaff4b55 | 1576 | struct sk_buff *reply; |
d6569377 | 1577 | struct datapath *dp; |
d6569377 | 1578 | int err; |
064af421 | 1579 | |
d81eef1b JR |
1580 | reply = ovs_dp_cmd_alloc_info(info); |
1581 | if (!reply) | |
1582 | return -ENOMEM; | |
1583 | ||
cd2a59e9 | 1584 | ovs_lock(); |
2a4999f3 | 1585 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1586 | err = PTR_ERR(dp); |
d6569377 | 1587 | if (IS_ERR(dp)) |
d81eef1b | 1588 | goto err_unlock_free; |
38c6ecbc | 1589 | |
c58cc9a4 TG |
1590 | ovs_dp_change(dp, info->attrs); |
1591 | ||
d81eef1b JR |
1592 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1593 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1594 | BUG_ON(err < 0); | |
aaff4b55 | 1595 | |
cd2a59e9 | 1596 | ovs_unlock(); |
cb25142c | 1597 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
aaff4b55 | 1598 | return 0; |
d81eef1b JR |
1599 | |
1600 | err_unlock_free: | |
cd2a59e9 | 1601 | ovs_unlock(); |
d81eef1b | 1602 | kfree_skb(reply); |
cd2a59e9 | 1603 | return err; |
064af421 BP |
1604 | } |
1605 | ||
df2c07f4 | 1606 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1607 | { |
aaff4b55 | 1608 | struct sk_buff *reply; |
d6569377 | 1609 | struct datapath *dp; |
d6569377 | 1610 | int err; |
1dcf111b | 1611 | |
d81eef1b JR |
1612 | reply = ovs_dp_cmd_alloc_info(info); |
1613 | if (!reply) | |
1614 | return -ENOMEM; | |
1615 | ||
1616 | rcu_read_lock(); | |
2a4999f3 | 1617 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1618 | if (IS_ERR(dp)) { |
1619 | err = PTR_ERR(dp); | |
d81eef1b | 1620 | goto err_unlock_free; |
cd2a59e9 | 1621 | } |
d81eef1b JR |
1622 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1623 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1624 | BUG_ON(err < 0); | |
1625 | rcu_read_unlock(); | |
aaff4b55 BP |
1626 | |
1627 | return genlmsg_reply(reply, info); | |
cd2a59e9 | 1628 | |
d81eef1b JR |
1629 | err_unlock_free: |
1630 | rcu_read_unlock(); | |
1631 | kfree_skb(reply); | |
cd2a59e9 | 1632 | return err; |
1dcf111b JP |
1633 | } |
1634 | ||
df2c07f4 | 1635 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1636 | { |
2a4999f3 | 1637 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1638 | struct datapath *dp; |
1639 | int skip = cb->args[0]; | |
1640 | int i = 0; | |
a7786963 | 1641 | |
fb93e9aa PS |
1642 | rcu_read_lock(); |
1643 | list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1644 | if (i >= skip && |
28aea917 | 1645 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1646 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1647 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1648 | break; |
254f2dc8 | 1649 | i++; |
a7786963 | 1650 | } |
fb93e9aa | 1651 | rcu_read_unlock(); |
aaff4b55 | 1652 | |
254f2dc8 BP |
1653 | cb->args[0] = i; |
1654 | ||
aaff4b55 | 1655 | return skb->len; |
c19e6535 BP |
1656 | } |
1657 | ||
cb25142c PS |
1658 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1659 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1660 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1661 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1662 | }; | |
1663 | ||
aaff4b55 | 1664 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1665 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1666 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1667 | .policy = datapath_policy, | |
df2c07f4 | 1668 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1669 | }, |
df2c07f4 | 1670 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1671 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1672 | .policy = datapath_policy, | |
df2c07f4 | 1673 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1674 | }, |
df2c07f4 | 1675 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1676 | .flags = 0, /* OK for unprivileged users. */ |
1677 | .policy = datapath_policy, | |
df2c07f4 JP |
1678 | .doit = ovs_dp_cmd_get, |
1679 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1680 | }, |
df2c07f4 | 1681 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1682 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1683 | .policy = datapath_policy, | |
df2c07f4 | 1684 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1685 | }, |
1686 | }; | |
1687 | ||
cb25142c | 1688 | static struct genl_family dp_datapath_genl_family = { |
f0fef760 | 1689 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1690 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1691 | .name = OVS_DATAPATH_FAMILY, |
1692 | .version = OVS_DATAPATH_VERSION, | |
1693 | .maxattr = OVS_DP_ATTR_MAX, | |
b3dcb73c | 1694 | .netnsok = true, |
cb25142c PS |
1695 | .parallel_ops = true, |
1696 | .ops = dp_datapath_genl_ops, | |
1697 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1698 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1699 | .n_mcgrps = 1, | |
f0fef760 BP |
1700 | }; |
1701 | ||
cd2a59e9 | 1702 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1703 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1704 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1705 | { |
df2c07f4 | 1706 | struct ovs_header *ovs_header; |
e926dfe3 | 1707 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1708 | int err; |
1709 | ||
28aea917 | 1710 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1711 | flags, cmd); |
df2c07f4 | 1712 | if (!ovs_header) |
f0fef760 | 1713 | return -EMSGSIZE; |
c19e6535 | 1714 | |
99769a40 | 1715 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1716 | |
c3cc8c03 DM |
1717 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1718 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
beb1c69a | 1719 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport))) |
c3cc8c03 | 1720 | goto nla_put_failure; |
c19e6535 | 1721 | |
850b6b3b | 1722 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1723 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1724 | &vport_stats)) | |
1725 | goto nla_put_failure; | |
c19e6535 | 1726 | |
beb1c69a AW |
1727 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1728 | goto nla_put_failure; | |
1729 | ||
850b6b3b | 1730 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1731 | if (err == -EMSGSIZE) |
1732 | goto error; | |
c19e6535 | 1733 | |
df2c07f4 | 1734 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1735 | |
1736 | nla_put_failure: | |
1737 | err = -EMSGSIZE; | |
f0fef760 | 1738 | error: |
df2c07f4 | 1739 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1740 | return err; |
064af421 BP |
1741 | } |
1742 | ||
d81eef1b JR |
1743 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1744 | { | |
1745 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1746 | } | |
1747 | ||
1748 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
28aea917 | 1749 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 1750 | u32 seq, u8 cmd) |
064af421 | 1751 | { |
c19e6535 | 1752 | struct sk_buff *skb; |
f0fef760 | 1753 | int retval; |
c19e6535 | 1754 | |
f0fef760 | 1755 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1756 | if (!skb) |
1757 | return ERR_PTR(-ENOMEM); | |
1758 | ||
28aea917 | 1759 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
1760 | BUG_ON(retval < 0); |
1761 | ||
c19e6535 | 1762 | return skb; |
f0fef760 | 1763 | } |
c19e6535 | 1764 | |
cd2a59e9 | 1765 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 | 1766 | static struct vport *lookup_vport(struct net *net, |
f1f60b85 | 1767 | const struct ovs_header *ovs_header, |
df2c07f4 | 1768 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1769 | { |
1770 | struct datapath *dp; | |
1771 | struct vport *vport; | |
1772 | ||
df2c07f4 | 1773 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1774 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1775 | if (!vport) |
c19e6535 | 1776 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1777 | if (ovs_header->dp_ifindex && |
1778 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1779 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1780 | return vport; |
df2c07f4 JP |
1781 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1782 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1783 | |
1784 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1785 | return ERR_PTR(-EFBIG); |
c19e6535 | 1786 | |
2a4999f3 | 1787 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1788 | if (!dp) |
1789 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1790 | |
cd2a59e9 | 1791 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 1792 | if (!vport) |
17535c57 | 1793 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1794 | return vport; |
1795 | } else | |
1796 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1797 | } |
1798 | ||
df2c07f4 | 1799 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1800 | { |
f0fef760 | 1801 | struct nlattr **a = info->attrs; |
df2c07f4 | 1802 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1803 | struct vport_parms parms; |
ed099e92 | 1804 | struct sk_buff *reply; |
c19e6535 | 1805 | struct vport *vport; |
c19e6535 | 1806 | struct datapath *dp; |
b0ec0f27 | 1807 | u32 port_no; |
c19e6535 | 1808 | int err; |
b0ec0f27 | 1809 | |
ea36840f BP |
1810 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1811 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
d81eef1b JR |
1812 | return -EINVAL; |
1813 | ||
1814 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1815 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1816 | if (port_no >= DP_MAX_PORTS) | |
1817 | return -EFBIG; | |
1818 | ||
1819 | reply = ovs_vport_cmd_alloc_info(); | |
1820 | if (!reply) | |
1821 | return -ENOMEM; | |
f0fef760 | 1822 | |
cd2a59e9 | 1823 | ovs_lock(); |
2a4999f3 | 1824 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1825 | err = -ENODEV; |
1826 | if (!dp) | |
d81eef1b | 1827 | goto exit_unlock_free; |
c19e6535 | 1828 | |
d81eef1b | 1829 | if (port_no) { |
cd2a59e9 | 1830 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1831 | err = -EBUSY; |
1832 | if (vport) | |
d81eef1b | 1833 | goto exit_unlock_free; |
c19e6535 BP |
1834 | } else { |
1835 | for (port_no = 1; ; port_no++) { | |
1836 | if (port_no >= DP_MAX_PORTS) { | |
1837 | err = -EFBIG; | |
d81eef1b | 1838 | goto exit_unlock_free; |
c19e6535 | 1839 | } |
cd2a59e9 | 1840 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1841 | if (!vport) |
1842 | break; | |
51d4d598 | 1843 | } |
064af421 | 1844 | } |
b0ec0f27 | 1845 | |
df2c07f4 JP |
1846 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1847 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1848 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1849 | parms.dp = dp; |
1850 | parms.port_no = port_no; | |
beb1c69a | 1851 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
c19e6535 BP |
1852 | |
1853 | vport = new_vport(&parms); | |
1854 | err = PTR_ERR(vport); | |
1855 | if (IS_ERR(vport)) | |
d81eef1b | 1856 | goto exit_unlock_free; |
c19e6535 | 1857 | |
d81eef1b JR |
1858 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1859 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1860 | BUG_ON(err < 0); | |
1861 | ovs_unlock(); | |
e297c6b7 | 1862 | |
cb25142c | 1863 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 1864 | return 0; |
c19e6535 | 1865 | |
d81eef1b | 1866 | exit_unlock_free: |
cd2a59e9 | 1867 | ovs_unlock(); |
d81eef1b | 1868 | kfree_skb(reply); |
c19e6535 | 1869 | return err; |
44e05eca BP |
1870 | } |
1871 | ||
df2c07f4 | 1872 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1873 | { |
f0fef760 BP |
1874 | struct nlattr **a = info->attrs; |
1875 | struct sk_buff *reply; | |
c19e6535 | 1876 | struct vport *vport; |
c19e6535 | 1877 | int err; |
44e05eca | 1878 | |
d81eef1b JR |
1879 | reply = ovs_vport_cmd_alloc_info(); |
1880 | if (!reply) | |
1881 | return -ENOMEM; | |
1882 | ||
cd2a59e9 | 1883 | ovs_lock(); |
2a4999f3 | 1884 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
1885 | err = PTR_ERR(vport); |
1886 | if (IS_ERR(vport)) | |
d81eef1b | 1887 | goto exit_unlock_free; |
44e05eca | 1888 | |
6455100f | 1889 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 1890 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 1891 | err = -EINVAL; |
d81eef1b | 1892 | goto exit_unlock_free; |
c25ea534 JG |
1893 | } |
1894 | ||
17ec1d04 | 1895 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 1896 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 | 1897 | if (err) |
d81eef1b | 1898 | goto exit_unlock_free; |
17ec1d04 | 1899 | } |
1fc7083d | 1900 | |
beb1c69a AW |
1901 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { |
1902 | err = ovs_vport_set_upcall_portids(vport, | |
1903 | a[OVS_VPORT_ATTR_UPCALL_PID]); | |
1904 | if (err) | |
1905 | goto exit_unlock_free; | |
1906 | } | |
c19e6535 | 1907 | |
c25ea534 JG |
1908 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1909 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1910 | BUG_ON(err < 0); | |
cd2a59e9 | 1911 | ovs_unlock(); |
d81eef1b | 1912 | |
cb25142c | 1913 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
c25ea534 JG |
1914 | return 0; |
1915 | ||
d81eef1b | 1916 | exit_unlock_free: |
cd2a59e9 | 1917 | ovs_unlock(); |
d81eef1b | 1918 | kfree_skb(reply); |
c19e6535 | 1919 | return err; |
064af421 BP |
1920 | } |
1921 | ||
df2c07f4 | 1922 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1923 | { |
f0fef760 BP |
1924 | struct nlattr **a = info->attrs; |
1925 | struct sk_buff *reply; | |
c19e6535 | 1926 | struct vport *vport; |
c19e6535 BP |
1927 | int err; |
1928 | ||
d81eef1b JR |
1929 | reply = ovs_vport_cmd_alloc_info(); |
1930 | if (!reply) | |
1931 | return -ENOMEM; | |
1932 | ||
cd2a59e9 | 1933 | ovs_lock(); |
2a4999f3 | 1934 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 1935 | err = PTR_ERR(vport); |
f0fef760 | 1936 | if (IS_ERR(vport)) |
d81eef1b | 1937 | goto exit_unlock_free; |
c19e6535 | 1938 | |
df2c07f4 | 1939 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 | 1940 | err = -EINVAL; |
d81eef1b | 1941 | goto exit_unlock_free; |
f0fef760 BP |
1942 | } |
1943 | ||
d81eef1b JR |
1944 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1945 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
1946 | BUG_ON(err < 0); | |
850b6b3b | 1947 | ovs_dp_detach_port(vport); |
d81eef1b | 1948 | ovs_unlock(); |
f0fef760 | 1949 | |
cb25142c | 1950 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 1951 | return 0; |
f0fef760 | 1952 | |
d81eef1b | 1953 | exit_unlock_free: |
cd2a59e9 | 1954 | ovs_unlock(); |
d81eef1b | 1955 | kfree_skb(reply); |
c19e6535 | 1956 | return err; |
7c40efc9 BP |
1957 | } |
1958 | ||
df2c07f4 | 1959 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1960 | { |
f0fef760 | 1961 | struct nlattr **a = info->attrs; |
df2c07f4 | 1962 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 1963 | struct sk_buff *reply; |
c19e6535 | 1964 | struct vport *vport; |
c19e6535 BP |
1965 | int err; |
1966 | ||
d81eef1b JR |
1967 | reply = ovs_vport_cmd_alloc_info(); |
1968 | if (!reply) | |
1969 | return -ENOMEM; | |
1970 | ||
ed099e92 | 1971 | rcu_read_lock(); |
2a4999f3 | 1972 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
1973 | err = PTR_ERR(vport); |
1974 | if (IS_ERR(vport)) | |
d81eef1b JR |
1975 | goto exit_unlock_free; |
1976 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
1977 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1978 | BUG_ON(err < 0); | |
df2fa9b5 JG |
1979 | rcu_read_unlock(); |
1980 | ||
1981 | return genlmsg_reply(reply, info); | |
ed099e92 | 1982 | |
d81eef1b | 1983 | exit_unlock_free: |
ed099e92 | 1984 | rcu_read_unlock(); |
d81eef1b | 1985 | kfree_skb(reply); |
c19e6535 BP |
1986 | return err; |
1987 | } | |
1988 | ||
df2c07f4 | 1989 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 1990 | { |
df2c07f4 | 1991 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 1992 | struct datapath *dp; |
95b1d73a PS |
1993 | int bucket = cb->args[0], skip = cb->args[1]; |
1994 | int i, j = 0; | |
c19e6535 | 1995 | |
03fc2881 | 1996 | rcu_read_lock(); |
01ac0970 | 1997 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
03fc2881 JR |
1998 | if (!dp) { |
1999 | rcu_read_unlock(); | |
f0fef760 | 2000 | return -ENODEV; |
03fc2881 | 2001 | } |
95b1d73a | 2002 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2003 | struct vport *vport; |
95b1d73a PS |
2004 | |
2005 | j = 0; | |
f8dfbcb7 | 2006 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2007 | if (j >= skip && |
2008 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 2009 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2010 | cb->nlh->nlmsg_seq, |
2011 | NLM_F_MULTI, | |
2012 | OVS_VPORT_CMD_NEW) < 0) | |
2013 | goto out; | |
2014 | ||
2015 | j++; | |
2016 | } | |
2017 | skip = 0; | |
c19e6535 | 2018 | } |
95b1d73a | 2019 | out: |
ed099e92 | 2020 | rcu_read_unlock(); |
c19e6535 | 2021 | |
95b1d73a PS |
2022 | cb->args[0] = i; |
2023 | cb->args[1] = j; | |
f0fef760 | 2024 | |
95b1d73a | 2025 | return skb->len; |
7c40efc9 BP |
2026 | } |
2027 | ||
cb25142c PS |
2028 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2029 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2030 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2031 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2032 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2033 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2034 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2035 | }; | |
2036 | ||
f0fef760 | 2037 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2038 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
2039 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2040 | .policy = vport_policy, | |
df2c07f4 | 2041 | .doit = ovs_vport_cmd_new |
f0fef760 | 2042 | }, |
df2c07f4 | 2043 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
2044 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2045 | .policy = vport_policy, | |
df2c07f4 | 2046 | .doit = ovs_vport_cmd_del |
f0fef760 | 2047 | }, |
df2c07f4 | 2048 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2049 | .flags = 0, /* OK for unprivileged users. */ |
2050 | .policy = vport_policy, | |
df2c07f4 JP |
2051 | .doit = ovs_vport_cmd_get, |
2052 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2053 | }, |
df2c07f4 | 2054 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
2055 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2056 | .policy = vport_policy, | |
df2c07f4 | 2057 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2058 | }, |
2059 | }; | |
2060 | ||
cb25142c PS |
2061 | struct genl_family dp_vport_genl_family = { |
2062 | .id = GENL_ID_GENERATE, | |
2063 | .hdrsize = sizeof(struct ovs_header), | |
2064 | .name = OVS_VPORT_FAMILY, | |
2065 | .version = OVS_VPORT_VERSION, | |
2066 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2067 | .netnsok = true, | |
2068 | .parallel_ops = true, | |
2069 | .ops = dp_vport_genl_ops, | |
2070 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2071 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2072 | .n_mcgrps = 1, | |
982b8810 | 2073 | }; |
ed099e92 | 2074 | |
cb25142c PS |
2075 | static struct genl_family *dp_genl_families[] = { |
2076 | &dp_datapath_genl_family, | |
2077 | &dp_vport_genl_family, | |
2078 | &dp_flow_genl_family, | |
2079 | &dp_packet_genl_family, | |
982b8810 | 2080 | }; |
ed099e92 | 2081 | |
982b8810 BP |
2082 | static void dp_unregister_genl(int n_families) |
2083 | { | |
2084 | int i; | |
ed099e92 | 2085 | |
b867ca75 | 2086 | for (i = 0; i < n_families; i++) |
cb25142c | 2087 | genl_unregister_family(dp_genl_families[i]); |
ed099e92 BP |
2088 | } |
2089 | ||
982b8810 | 2090 | static int dp_register_genl(void) |
064af421 | 2091 | { |
982b8810 BP |
2092 | int err; |
2093 | int i; | |
064af421 | 2094 | |
982b8810 | 2095 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
064af421 | 2096 | |
cb25142c | 2097 | err = genl_register_family(dp_genl_families[i]); |
982b8810 BP |
2098 | if (err) |
2099 | goto error; | |
982b8810 | 2100 | } |
9cc8b4e4 | 2101 | |
982b8810 | 2102 | return 0; |
064af421 BP |
2103 | |
2104 | error: | |
cb25142c | 2105 | dp_unregister_genl(i); |
982b8810 | 2106 | return err; |
064af421 BP |
2107 | } |
2108 | ||
2a4999f3 PS |
2109 | static int __net_init ovs_init_net(struct net *net) |
2110 | { | |
2111 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2112 | ||
2113 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 2114 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
2a4999f3 PS |
2115 | return 0; |
2116 | } | |
2117 | ||
2118 | static void __net_exit ovs_exit_net(struct net *net) | |
2119 | { | |
cd2a59e9 | 2120 | struct datapath *dp, *dp_next; |
2a4999f3 PS |
2121 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
2122 | ||
cd2a59e9 PS |
2123 | ovs_lock(); |
2124 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2125 | __dp_destroy(dp); | |
2126 | ovs_unlock(); | |
2127 | ||
2128 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
2129 | } |
2130 | ||
2131 | static struct pernet_operations ovs_net_ops = { | |
2132 | .init = ovs_init_net, | |
2133 | .exit = ovs_exit_net, | |
2134 | .id = &ovs_net_id, | |
2135 | .size = sizeof(struct ovs_net), | |
2136 | }; | |
2137 | ||
637c8268 PS |
2138 | DEFINE_COMPAT_PNET_REG_FUNC(device); |
2139 | ||
22d24ebf BP |
2140 | static int __init dp_init(void) |
2141 | { | |
2142 | int err; | |
2143 | ||
f3d85db3 | 2144 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2145 | |
dc5f3fef | 2146 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 2147 | VERSION); |
064af421 | 2148 | |
2c8c4fb7 | 2149 | err = action_fifos_init(); |
3544358a | 2150 | if (err) |
533e96e7 | 2151 | goto error; |
3544358a | 2152 | |
2c8c4fb7 AZ |
2153 | err = ovs_flow_init(); |
2154 | if (err) | |
2155 | goto error_action_fifos_exit; | |
2156 | ||
850b6b3b | 2157 | err = ovs_vport_init(); |
064af421 BP |
2158 | if (err) |
2159 | goto error_flow_exit; | |
2160 | ||
2a4999f3 | 2161 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2162 | if (err) |
2163 | goto error_vport_exit; | |
2164 | ||
2a4999f3 PS |
2165 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2166 | if (err) | |
2167 | goto error_netns_exit; | |
2168 | ||
982b8810 BP |
2169 | err = dp_register_genl(); |
2170 | if (err < 0) | |
37a1300c | 2171 | goto error_unreg_notifier; |
982b8810 | 2172 | |
064af421 BP |
2173 | return 0; |
2174 | ||
2175 | error_unreg_notifier: | |
850b6b3b | 2176 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2177 | error_netns_exit: |
2178 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2179 | error_vport_exit: |
850b6b3b | 2180 | ovs_vport_exit(); |
064af421 | 2181 | error_flow_exit: |
850b6b3b | 2182 | ovs_flow_exit(); |
2c8c4fb7 AZ |
2183 | error_action_fifos_exit: |
2184 | action_fifos_exit(); | |
064af421 BP |
2185 | error: |
2186 | return err; | |
2187 | } | |
2188 | ||
2189 | static void dp_cleanup(void) | |
2190 | { | |
982b8810 | 2191 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
850b6b3b | 2192 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2193 | unregister_pernet_device(&ovs_net_ops); |
2194 | rcu_barrier(); | |
850b6b3b JG |
2195 | ovs_vport_exit(); |
2196 | ovs_flow_exit(); | |
2c8c4fb7 | 2197 | action_fifos_exit(); |
064af421 BP |
2198 | } |
2199 | ||
2200 | module_init(dp_init); | |
2201 | module_exit(dp_cleanup); | |
2202 | ||
2203 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2204 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2205 | MODULE_VERSION(VERSION); |