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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 | 81 | /* Check if need to build a reply message. |
af465b67 PS |
82 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. |
83 | */ | |
114fce23 SG |
84 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
85 | unsigned int group) | |
afad3556 JR |
86 | { |
87 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
6233a1bd | 88 | genl_has_listeners(family, genl_info_net(info), 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 *, |
7d16c847 | 141 | const struct sw_flow_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 | |
af465b67 PS |
159 | * returned dp pointer valid. |
160 | */ | |
01ac0970 AZ |
161 | static inline struct datapath *get_dp(struct net *net, int dp_ifindex) |
162 | { | |
163 | struct datapath *dp; | |
164 | ||
165 | WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); | |
166 | rcu_read_lock(); | |
167 | dp = get_dp_rcu(net, dp_ifindex); | |
254f2dc8 BP |
168 | rcu_read_unlock(); |
169 | ||
170 | return dp; | |
064af421 | 171 | } |
064af421 | 172 | |
cd2a59e9 | 173 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 174 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 175 | { |
cd2a59e9 | 176 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
16b82e84 | 177 | return vport->ops->get_name(vport); |
f2459fe7 JG |
178 | } |
179 | ||
f1f60b85 | 180 | static int get_dpifindex(const struct datapath *dp) |
99769a40 JG |
181 | { |
182 | struct vport *local; | |
183 | int ifindex; | |
184 | ||
185 | rcu_read_lock(); | |
186 | ||
95b1d73a | 187 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 188 | if (local) |
d5de5b0d | 189 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
99769a40 JG |
190 | else |
191 | ifindex = 0; | |
192 | ||
193 | rcu_read_unlock(); | |
194 | ||
195 | return ifindex; | |
196 | } | |
197 | ||
46c6a11d JG |
198 | static void destroy_dp_rcu(struct rcu_head *rcu) |
199 | { | |
200 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 201 | |
e379e4d1 | 202 | ovs_flow_tbl_destroy(&dp->table); |
46c6a11d | 203 | free_percpu(dp->stats_percpu); |
2a4999f3 | 204 | release_net(ovs_dp_get_net(dp)); |
95b1d73a | 205 | kfree(dp->ports); |
5ca1ba48 | 206 | kfree(dp); |
46c6a11d JG |
207 | } |
208 | ||
95b1d73a PS |
209 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
210 | u16 port_no) | |
211 | { | |
212 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
213 | } | |
214 | ||
aa917006 | 215 | /* Called with ovs_mutex or RCU read lock. */ |
95b1d73a PS |
216 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
217 | { | |
218 | struct vport *vport; | |
95b1d73a PS |
219 | struct hlist_head *head; |
220 | ||
221 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 222 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
223 | if (vport->port_no == port_no) |
224 | return vport; | |
225 | } | |
226 | return NULL; | |
227 | } | |
228 | ||
cd2a59e9 | 229 | /* Called with ovs_mutex. */ |
c19e6535 | 230 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 231 | { |
f2459fe7 | 232 | struct vport *vport; |
f2459fe7 | 233 | |
850b6b3b | 234 | vport = ovs_vport_add(parms); |
c19e6535 BP |
235 | if (!IS_ERR(vport)) { |
236 | struct datapath *dp = parms->dp; | |
95b1d73a | 237 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 238 | |
95b1d73a | 239 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 240 | } |
c19e6535 | 241 | return vport; |
064af421 BP |
242 | } |
243 | ||
850b6b3b | 244 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 245 | { |
cd2a59e9 | 246 | ASSERT_OVSL(); |
064af421 | 247 | |
064af421 | 248 | /* First drop references to device. */ |
95b1d73a | 249 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 250 | |
7237e4f4 | 251 | /* Then destroy it. */ |
850b6b3b | 252 | ovs_vport_del(p); |
064af421 BP |
253 | } |
254 | ||
fb66fbd1 | 255 | /* Must be called with rcu_read_lock. */ |
e74d4817 | 256 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 257 | { |
a6059080 | 258 | const struct vport *p = OVS_CB(skb)->input_vport; |
064af421 | 259 | struct datapath *dp = p->dp; |
3544358a | 260 | struct sw_flow *flow; |
ad50cb60 | 261 | struct sw_flow_actions *sf_acts; |
064af421 | 262 | struct dp_stats_percpu *stats; |
e9141eec | 263 | u64 *stats_counter; |
4fa72a95 | 264 | u32 n_mask_hit; |
064af421 | 265 | |
70dbc259 | 266 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 267 | |
52a23d92 | 268 | /* Look up flow. */ |
e74d4817 | 269 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
5604935e | 270 | &n_mask_hit); |
52a23d92 JG |
271 | if (unlikely(!flow)) { |
272 | struct dp_upcall_info upcall; | |
a7d607c5 | 273 | int error; |
52a23d92 JG |
274 | |
275 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
52a23d92 | 276 | upcall.userdata = NULL; |
beb1c69a | 277 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
8b7ea2d4 | 278 | upcall.egress_tun_info = NULL; |
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); | |
52a23d92 JG |
284 | stats_counter = &stats->n_missed; |
285 | goto out; | |
286 | } | |
287 | ||
e74d4817 | 288 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
ad50cb60 | 289 | sf_acts = rcu_dereference(flow->sf_acts); |
7d16c847 PS |
290 | ovs_execute_actions(dp, skb, sf_acts, key); |
291 | ||
b0b906cc | 292 | stats_counter = &stats->n_hit; |
55574bb0 | 293 | |
8819fac7 | 294 | out: |
55574bb0 | 295 | /* Update datapath statistics. */ |
b81deb15 | 296 | u64_stats_update_begin(&stats->syncp); |
e9141eec | 297 | (*stats_counter)++; |
4fa72a95 | 298 | stats->n_mask_hit += n_mask_hit; |
b81deb15 | 299 | u64_stats_update_end(&stats->syncp); |
064af421 BP |
300 | } |
301 | ||
850b6b3b | 302 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 303 | const struct sw_flow_key *key, |
850b6b3b | 304 | const struct dp_upcall_info *upcall_info) |
aa5a8fdc JG |
305 | { |
306 | struct dp_stats_percpu *stats; | |
307 | int err; | |
308 | ||
28aea917 | 309 | if (upcall_info->portid == 0) { |
b063d9f0 | 310 | err = -ENOTCONN; |
b063d9f0 JG |
311 | goto err; |
312 | } | |
313 | ||
7257b535 | 314 | if (!skb_is_gso(skb)) |
e74d4817 | 315 | err = queue_userspace_packet(dp, skb, key, upcall_info); |
7257b535 | 316 | else |
e74d4817 | 317 | err = queue_gso_packets(dp, skb, key, upcall_info); |
d76195db JG |
318 | if (err) |
319 | goto err; | |
320 | ||
321 | return 0; | |
aa5a8fdc | 322 | |
aa5a8fdc | 323 | err: |
70dbc259 | 324 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 325 | |
b81deb15 | 326 | u64_stats_update_begin(&stats->syncp); |
aa5a8fdc | 327 | stats->n_lost++; |
b81deb15 | 328 | u64_stats_update_end(&stats->syncp); |
aa5a8fdc | 329 | |
aa5a8fdc | 330 | return err; |
982b8810 BP |
331 | } |
332 | ||
5ae440c3 | 333 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 334 | const struct sw_flow_key *key, |
7257b535 | 335 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 336 | { |
d4cba1f8 | 337 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
338 | struct sw_flow_key later_key; |
339 | struct sk_buff *segs, *nskb; | |
b2a23c4e | 340 | struct ovs_skb_cb ovs_cb; |
7257b535 | 341 | int err; |
cb5087ca | 342 | |
b2a23c4e | 343 | ovs_cb = *OVS_CB(skb); |
1d04cd4e | 344 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
b2a23c4e | 345 | *OVS_CB(skb) = ovs_cb; |
79089764 PS |
346 | if (IS_ERR(segs)) |
347 | return PTR_ERR(segs); | |
d1da7669 PS |
348 | if (segs == NULL) |
349 | return -EINVAL; | |
99769a40 | 350 | |
9b277b39 | 351 | if (gso_type & SKB_GSO_UDP) { |
c135bba1 | 352 | /* The initial flow key extracted by ovs_flow_key_extract() |
9b277b39 PS |
353 | * in this case is for a first fragment, so we need to |
354 | * properly mark later fragments. | |
355 | */ | |
e74d4817 | 356 | later_key = *key; |
9b277b39 PS |
357 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
358 | } | |
359 | ||
7257b535 BP |
360 | /* Queue all of the segments. */ |
361 | skb = segs; | |
cb5087ca | 362 | do { |
b2a23c4e | 363 | *OVS_CB(skb) = ovs_cb; |
9b277b39 | 364 | if (gso_type & SKB_GSO_UDP && skb != segs) |
e74d4817 | 365 | key = &later_key; |
9b277b39 | 366 | |
e74d4817 | 367 | err = queue_userspace_packet(dp, skb, key, upcall_info); |
982b8810 | 368 | if (err) |
7257b535 | 369 | break; |
856081f6 | 370 | |
36ce148c | 371 | } while ((skb = skb->next)); |
cb5087ca | 372 | |
7257b535 BP |
373 | /* Free all of the segments. */ |
374 | skb = segs; | |
375 | do { | |
376 | nskb = skb->next; | |
377 | if (err) | |
378 | kfree_skb(skb); | |
379 | else | |
380 | consume_skb(skb); | |
381 | } while ((skb = nskb)); | |
382 | return err; | |
383 | } | |
384 | ||
8b7ea2d4 | 385 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
533bea51 | 386 | unsigned int hdrlen) |
0afa2373 TG |
387 | { |
388 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
533bea51 | 389 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
4e25b8c1 | 390 | + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
0afa2373 TG |
391 | |
392 | /* OVS_PACKET_ATTR_USERDATA */ | |
8b7ea2d4 WZ |
393 | if (upcall_info->userdata) |
394 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
395 | ||
396 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
397 | if (upcall_info->egress_tun_info) | |
398 | size += nla_total_size(ovs_tun_key_attr_size()); | |
0afa2373 TG |
399 | |
400 | return size; | |
401 | } | |
402 | ||
5ae440c3 | 403 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 404 | const struct sw_flow_key *key, |
7257b535 BP |
405 | const struct dp_upcall_info *upcall_info) |
406 | { | |
407 | struct ovs_header *upcall; | |
6161d3fd | 408 | struct sk_buff *nskb = NULL; |
82706a6f | 409 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
7257b535 | 410 | struct nlattr *nla; |
68eadcf0 | 411 | struct genl_info info = { |
705e9260 | 412 | #ifdef HAVE_GENLMSG_NEW_UNICAST |
5ae440c3 | 413 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
68eadcf0 TG |
414 | #endif |
415 | .snd_portid = upcall_info->portid, | |
416 | }; | |
978188b2 | 417 | size_t len; |
533bea51 | 418 | unsigned int hlen; |
5ae440c3 TG |
419 | int err, dp_ifindex; |
420 | ||
421 | dp_ifindex = get_dpifindex(dp); | |
422 | if (!dp_ifindex) | |
423 | return -ENODEV; | |
7257b535 | 424 | |
efd8a18e | 425 | if (skb_vlan_tag_present(skb)) { |
6161d3fd JG |
426 | nskb = skb_clone(skb, GFP_ATOMIC); |
427 | if (!nskb) | |
428 | return -ENOMEM; | |
07ac71ea | 429 | |
efd8a18e | 430 | nskb = vlan_insert_tag_set_proto(nskb, nskb->vlan_proto, skb_vlan_tag_get(nskb)); |
07ac71ea PS |
431 | if (!nskb) |
432 | return -ENOMEM; | |
433 | ||
434 | vlan_set_tci(nskb, 0); | |
7257b535 | 435 | |
6161d3fd JG |
436 | skb = nskb; |
437 | } | |
438 | ||
439 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
440 | err = -EFBIG; | |
441 | goto out; | |
442 | } | |
7257b535 | 443 | |
533bea51 TG |
444 | /* Complete checksum if needed */ |
445 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
446 | (err = skb_checksum_help(skb))) | |
447 | goto out; | |
448 | ||
449 | /* Older versions of OVS user space enforce alignment of the last | |
450 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
451 | * padding logic. Only perform zerocopy if padding is not required. | |
452 | */ | |
453 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
454 | hlen = skb_zerocopy_headlen(skb); | |
455 | else | |
456 | hlen = skb->len; | |
457 | ||
8b7ea2d4 | 458 | len = upcall_msg_size(upcall_info, hlen); |
68eadcf0 | 459 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
6161d3fd JG |
460 | if (!user_skb) { |
461 | err = -ENOMEM; | |
462 | goto out; | |
463 | } | |
7257b535 BP |
464 | |
465 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
466 | 0, upcall_info->cmd); | |
467 | upcall->dp_ifindex = dp_ifindex; | |
468 | ||
db7f2238 | 469 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
9a621f82 | 470 | BUG_ON(err); |
7257b535 BP |
471 | |
472 | if (upcall_info->userdata) | |
e995e3df | 473 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 474 | nla_len(upcall_info->userdata), |
e995e3df | 475 | nla_data(upcall_info->userdata)); |
7257b535 | 476 | |
8b7ea2d4 WZ |
477 | if (upcall_info->egress_tun_info) { |
478 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
479 | err = ovs_nla_put_egress_tunnel_key(user_skb, | |
480 | upcall_info->egress_tun_info); | |
481 | BUG_ON(err); | |
482 | nla_nest_end(user_skb, nla); | |
483 | } | |
484 | ||
533bea51 | 485 | /* Only reserve room for attribute header, packet data is added |
af465b67 PS |
486 | * in skb_zerocopy() |
487 | */ | |
533bea51 TG |
488 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { |
489 | err = -ENOBUFS; | |
490 | goto out; | |
491 | } | |
492 | nla->nla_len = nla_attr_size(skb->len); | |
bed53bd1 | 493 | |
2c272bd9 ZK |
494 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
495 | if (err) | |
496 | goto out; | |
7257b535 | 497 | |
ef507cec | 498 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
978188b2 JG |
499 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { |
500 | size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len; | |
501 | ||
502 | if (plen > 0) | |
503 | memset(skb_put(user_skb, plen), 0, plen); | |
504 | } | |
ef507cec | 505 | |
533bea51 | 506 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
6161d3fd | 507 | |
533bea51 | 508 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
82706a6f | 509 | user_skb = NULL; |
6161d3fd | 510 | out: |
2c272bd9 ZK |
511 | if (err) |
512 | skb_tx_error(skb); | |
82706a6f | 513 | kfree_skb(user_skb); |
6161d3fd JG |
514 | kfree_skb(nskb); |
515 | return err; | |
cb5087ca BP |
516 | } |
517 | ||
df2c07f4 | 518 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 519 | { |
df2c07f4 | 520 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 521 | struct nlattr **a = info->attrs; |
e0e57990 | 522 | struct sw_flow_actions *acts; |
982b8810 | 523 | struct sk_buff *packet; |
e0e57990 | 524 | struct sw_flow *flow; |
ad50cb60 | 525 | struct sw_flow_actions *sf_acts; |
f7cd0081 | 526 | struct datapath *dp; |
d6569377 | 527 | struct ethhdr *eth; |
a6059080 | 528 | struct vport *input_vport; |
3f19d399 | 529 | int len; |
d6569377 | 530 | int err; |
2e460098 | 531 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
064af421 | 532 | |
f7cd0081 | 533 | err = -EINVAL; |
df2c07f4 | 534 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 535 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 536 | goto err; |
064af421 | 537 | |
df2c07f4 | 538 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 539 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
540 | err = -ENOMEM; |
541 | if (!packet) | |
e5cad958 | 542 | goto err; |
3f19d399 BP |
543 | skb_reserve(packet, NET_IP_ALIGN); |
544 | ||
bf3d6fce | 545 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 546 | |
f7cd0081 BP |
547 | skb_reset_mac_header(packet); |
548 | eth = eth_hdr(packet); | |
064af421 | 549 | |
d6569377 BP |
550 | /* Normally, setting the skb 'protocol' field would be handled by a |
551 | * call to eth_type_trans(), but it assumes there's a sending | |
af465b67 PS |
552 | * device, which we may not have. |
553 | */ | |
7cd46155 | 554 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
f7cd0081 | 555 | packet->protocol = eth->h_proto; |
d6569377 | 556 | else |
f7cd0081 | 557 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 558 | |
e0e57990 | 559 | /* Build an sw_flow for sending this packet. */ |
df65fec1 | 560 | flow = ovs_flow_alloc(); |
e0e57990 BP |
561 | err = PTR_ERR(flow); |
562 | if (IS_ERR(flow)) | |
e5cad958 | 563 | goto err_kfree_skb; |
064af421 | 564 | |
c135bba1 | 565 | err = ovs_flow_key_extract_userspace(a[OVS_PACKET_ATTR_KEY], packet, |
9233cef7 | 566 | &flow->key, log); |
e0e57990 | 567 | if (err) |
9321954a | 568 | goto err_flow_free; |
e0e57990 | 569 | |
a097c0b2 | 570 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
9233cef7 | 571 | &flow->key, &acts, log); |
9b405f1a PS |
572 | if (err) |
573 | goto err_flow_free; | |
e0e57990 | 574 | |
ff27161e | 575 | rcu_assign_pointer(flow->sf_acts, acts); |
800711c3 | 576 | OVS_CB(packet)->egress_tun_info = NULL; |
abff858b | 577 | packet->priority = flow->key.phy.priority; |
3025a772 | 578 | packet->mark = flow->key.phy.skb_mark; |
e0e57990 | 579 | |
d6569377 | 580 | rcu_read_lock(); |
01ac0970 | 581 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 582 | err = -ENODEV; |
e5cad958 BP |
583 | if (!dp) |
584 | goto err_unlock; | |
cc4015df | 585 | |
a6059080 AZ |
586 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
587 | if (!input_vport) | |
588 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
589 | ||
590 | if (!input_vport) | |
591 | goto err_unlock; | |
592 | ||
593 | OVS_CB(packet)->input_vport = input_vport; | |
ad50cb60 | 594 | sf_acts = rcu_dereference(flow->sf_acts); |
a6059080 | 595 | |
e9141eec | 596 | local_bh_disable(); |
7d16c847 | 597 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
e9141eec | 598 | local_bh_enable(); |
d6569377 | 599 | rcu_read_unlock(); |
e0e57990 | 600 | |
a1c564be | 601 | ovs_flow_free(flow, false); |
e5cad958 | 602 | return err; |
064af421 | 603 | |
e5cad958 BP |
604 | err_unlock: |
605 | rcu_read_unlock(); | |
9321954a | 606 | err_flow_free: |
a1c564be | 607 | ovs_flow_free(flow, false); |
e5cad958 BP |
608 | err_kfree_skb: |
609 | kfree_skb(packet); | |
610 | err: | |
d6569377 | 611 | return err; |
064af421 BP |
612 | } |
613 | ||
df2c07f4 | 614 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc | 615 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
df2c07f4 JP |
616 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
617 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
2e460098 | 618 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
982b8810 BP |
619 | }; |
620 | ||
621 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 622 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
623 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
624 | .policy = packet_policy, | |
df2c07f4 | 625 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
626 | } |
627 | }; | |
628 | ||
cb25142c PS |
629 | static struct genl_family dp_packet_genl_family = { |
630 | .id = GENL_ID_GENERATE, | |
631 | .hdrsize = sizeof(struct ovs_header), | |
632 | .name = OVS_PACKET_FAMILY, | |
633 | .version = OVS_PACKET_VERSION, | |
634 | .maxattr = OVS_PACKET_ATTR_MAX, | |
635 | .netnsok = true, | |
636 | .parallel_ops = true, | |
637 | .ops = dp_packet_genl_ops, | |
638 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
639 | }; | |
640 | ||
f1f60b85 | 641 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
4fa72a95 | 642 | struct ovs_dp_megaflow_stats *mega_stats) |
064af421 | 643 | { |
d6569377 | 644 | int i; |
f180c2e2 | 645 | |
4fa72a95 AZ |
646 | memset(mega_stats, 0, sizeof(*mega_stats)); |
647 | ||
994dc286 | 648 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
4fa72a95 | 649 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
064af421 | 650 | |
7257b535 | 651 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
4fa72a95 | 652 | |
d6569377 BP |
653 | for_each_possible_cpu(i) { |
654 | const struct dp_stats_percpu *percpu_stats; | |
655 | struct dp_stats_percpu local_stats; | |
821cb9fa | 656 | unsigned int start; |
44e05eca | 657 | |
d6569377 | 658 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 659 | |
d6569377 | 660 | do { |
b81deb15 | 661 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
d6569377 | 662 | local_stats = *percpu_stats; |
b81deb15 | 663 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
064af421 | 664 | |
d6569377 BP |
665 | stats->n_hit += local_stats.n_hit; |
666 | stats->n_missed += local_stats.n_missed; | |
667 | stats->n_lost += local_stats.n_lost; | |
4fa72a95 | 668 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
d6569377 BP |
669 | } |
670 | } | |
064af421 | 671 | |
0afa2373 TG |
672 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
673 | { | |
674 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
4e25b8c1 JS |
675 | + nla_total_size(ovs_key_attr_size()) /* OVS_FLOW_ATTR_KEY */ |
676 | + nla_total_size(ovs_key_attr_size()) /* OVS_FLOW_ATTR_MASK */ | |
0afa2373 TG |
677 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
678 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
679 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
680 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
681 | } | |
682 | ||
f1948bb9 JS |
683 | /* Called with ovs_mutex or RCU read lock. */ |
684 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
685 | struct sk_buff *skb) | |
686 | { | |
687 | struct ovs_flow_stats stats; | |
688 | __be16 tcp_flags; | |
689 | unsigned long used; | |
690 | ||
b0f3a2fe | 691 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
f71db6b1 | 692 | |
b0f3a2fe PS |
693 | if (used && |
694 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
f1948bb9 | 695 | return -EMSGSIZE; |
d6569377 | 696 | |
b0f3a2fe PS |
697 | if (stats.n_packets && |
698 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) | |
f1948bb9 | 699 | return -EMSGSIZE; |
b0b906cc | 700 | |
b0f3a2fe PS |
701 | if ((u8)ntohs(tcp_flags) && |
702 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
f1948bb9 JS |
703 | return -EMSGSIZE; |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
708 | /* Called with ovs_mutex or RCU read lock. */ | |
709 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
710 | struct sk_buff *skb, int skb_orig_len) | |
711 | { | |
712 | struct nlattr *start; | |
713 | int err; | |
d6569377 | 714 | |
df2c07f4 | 715 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
716 | * this is the first flow to be dumped into 'skb'. This is unusual for |
717 | * Netlink but individual action lists can be longer than | |
718 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
719 | * The userspace caller can always fetch the actions separately if it | |
720 | * really wants them. (Most userspace callers in fact don't care.) | |
721 | * | |
722 | * This can only fail for dump operations because the skb is always | |
723 | * properly sized for single flows. | |
724 | */ | |
9b405f1a | 725 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 726 | if (start) { |
f44ccce1 PS |
727 | const struct sw_flow_actions *sf_acts; |
728 | ||
780ec6ae | 729 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
a097c0b2 PS |
730 | err = ovs_nla_put_actions(sf_acts->actions, |
731 | sf_acts->actions_len, skb); | |
f71db6b1 | 732 | |
0a25b039 BP |
733 | if (!err) |
734 | nla_nest_end(skb, start); | |
735 | else { | |
736 | if (skb_orig_len) | |
f1948bb9 | 737 | return err; |
0a25b039 BP |
738 | |
739 | nla_nest_cancel(skb, start); | |
740 | } | |
f1948bb9 JS |
741 | } else if (skb_orig_len) { |
742 | return -EMSGSIZE; | |
743 | } | |
744 | ||
745 | return 0; | |
746 | } | |
747 | ||
748 | /* Called with ovs_mutex or RCU read lock. */ | |
2c622e5a | 749 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
f1948bb9 JS |
750 | struct sk_buff *skb, u32 portid, |
751 | u32 seq, u32 flags, u8 cmd) | |
752 | { | |
753 | const int skb_orig_len = skb->len; | |
754 | struct ovs_header *ovs_header; | |
755 | int err; | |
756 | ||
7d16c847 PS |
757 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, |
758 | flags, cmd); | |
f1948bb9 JS |
759 | if (!ovs_header) |
760 | return -EMSGSIZE; | |
7d16c847 | 761 | |
f1948bb9 JS |
762 | ovs_header->dp_ifindex = dp_ifindex; |
763 | ||
db7f2238 JS |
764 | err = ovs_nla_put_unmasked_key(flow, skb); |
765 | if (err) | |
766 | goto error; | |
767 | ||
768 | err = ovs_nla_put_mask(flow, skb); | |
f1948bb9 JS |
769 | if (err) |
770 | goto error; | |
771 | ||
772 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
773 | if (err) | |
774 | goto error; | |
775 | ||
776 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
777 | if (err) | |
778 | goto error; | |
37a1300c | 779 | |
23b48dc1 TG |
780 | genlmsg_end(skb, ovs_header); |
781 | return 0; | |
d6569377 | 782 | |
37a1300c | 783 | error: |
df2c07f4 | 784 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 785 | return err; |
44e05eca BP |
786 | } |
787 | ||
f71db6b1 JR |
788 | /* May not be called with RCU read lock. */ |
789 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
afad3556 JR |
790 | struct genl_info *info, |
791 | bool always) | |
44e05eca | 792 | { |
afad3556 | 793 | struct sk_buff *skb; |
d6569377 | 794 | |
114fce23 SG |
795 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, |
796 | GROUP_ID(&ovs_dp_flow_multicast_group))) | |
afad3556 JR |
797 | return NULL; |
798 | ||
f71db6b1 | 799 | skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL); |
afad3556 JR |
800 | if (!skb) |
801 | return ERR_PTR(-ENOMEM); | |
802 | ||
803 | return skb; | |
37a1300c | 804 | } |
8d5ebd83 | 805 | |
f71db6b1 | 806 | /* Called with ovs_mutex. */ |
7d16c847 | 807 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, |
f71db6b1 JR |
808 | int dp_ifindex, |
809 | struct genl_info *info, u8 cmd, | |
810 | bool always) | |
37a1300c BP |
811 | { |
812 | struct sk_buff *skb; | |
813 | int retval; | |
d6569377 | 814 | |
f71db6b1 JR |
815 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info, |
816 | always); | |
a6ddcc9a | 817 | if (IS_ERR_OR_NULL(skb)) |
afad3556 | 818 | return skb; |
d6569377 | 819 | |
2c622e5a | 820 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
f71db6b1 JR |
821 | info->snd_portid, info->snd_seq, 0, |
822 | cmd); | |
37a1300c | 823 | BUG_ON(retval < 0); |
d6569377 | 824 | return skb; |
064af421 BP |
825 | } |
826 | ||
0c9fd022 | 827 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
064af421 | 828 | { |
37a1300c | 829 | struct nlattr **a = info->attrs; |
df2c07f4 | 830 | struct ovs_header *ovs_header = info->userhdr; |
6740b721 | 831 | struct sw_flow *flow, *new_flow; |
a1c564be | 832 | struct sw_flow_mask mask; |
37a1300c | 833 | struct sk_buff *reply; |
9c52546b | 834 | struct datapath *dp; |
0c9fd022 | 835 | struct sw_flow_actions *acts; |
a1c564be | 836 | struct sw_flow_match match; |
bc4a05c6 | 837 | int error; |
9233cef7 | 838 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
064af421 | 839 | |
6740b721 | 840 | /* Must have key and actions. */ |
37a1300c | 841 | error = -EINVAL; |
a473df5b | 842 | if (!a[OVS_FLOW_ATTR_KEY]) { |
7d16c847 | 843 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
37a1300c | 844 | goto error; |
a473df5b JG |
845 | } |
846 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
7d16c847 | 847 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
6740b721 | 848 | goto error; |
a473df5b | 849 | } |
a1c564be | 850 | |
6740b721 | 851 | /* Most of the time we need to allocate a new flow, do it before |
af465b67 PS |
852 | * locking. |
853 | */ | |
6740b721 JR |
854 | new_flow = ovs_flow_alloc(); |
855 | if (IS_ERR(new_flow)) { | |
856 | error = PTR_ERR(new_flow); | |
857 | goto error; | |
858 | } | |
859 | ||
860 | /* Extract key. */ | |
861 | ovs_match_init(&match, &new_flow->unmasked_key, &mask); | |
9233cef7 JR |
862 | error = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], |
863 | a[OVS_FLOW_ATTR_MASK], log); | |
37a1300c | 864 | if (error) |
6740b721 | 865 | goto err_kfree_flow; |
064af421 | 866 | |
6740b721 | 867 | ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask); |
9b405f1a | 868 | |
6740b721 | 869 | /* Validate actions. */ |
6740b721 | 870 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key, |
9233cef7 | 871 | &acts, log); |
0c9fd022 | 872 | if (error) { |
7d16c847 | 873 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
4f67b12a | 874 | goto err_kfree_flow; |
6740b721 JR |
875 | } |
876 | ||
877 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
878 | if (IS_ERR(reply)) { | |
879 | error = PTR_ERR(reply); | |
880 | goto err_kfree_acts; | |
37a1300c BP |
881 | } |
882 | ||
cd2a59e9 | 883 | ovs_lock(); |
2a4999f3 | 884 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
6740b721 JR |
885 | if (unlikely(!dp)) { |
886 | error = -ENODEV; | |
cd2a59e9 | 887 | goto err_unlock_ovs; |
6740b721 | 888 | } |
a1c564be | 889 | /* Check if this is a duplicate flow */ |
6740b721 JR |
890 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key); |
891 | if (likely(!flow)) { | |
892 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
d6569377 | 893 | |
d6569377 | 894 | /* Put flow in bucket. */ |
6740b721 JR |
895 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
896 | if (unlikely(error)) { | |
0585f7a8 | 897 | acts = NULL; |
6740b721 JR |
898 | goto err_unlock_ovs; |
899 | } | |
900 | ||
901 | if (unlikely(reply)) { | |
2c622e5a | 902 | error = ovs_flow_cmd_fill_info(new_flow, |
6740b721 JR |
903 | ovs_header->dp_ifindex, |
904 | reply, info->snd_portid, | |
905 | info->snd_seq, 0, | |
906 | OVS_FLOW_CMD_NEW); | |
907 | BUG_ON(error < 0); | |
0585f7a8 | 908 | } |
6740b721 | 909 | ovs_unlock(); |
d6569377 | 910 | } else { |
0c9fd022 JR |
911 | struct sw_flow_actions *old_acts; |
912 | ||
d6569377 BP |
913 | /* Bail out if we're not allowed to modify an existing flow. |
914 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
915 | * because Generic Netlink treats the latter as a dump | |
916 | * request. We also accept NLM_F_EXCL in case that bug ever | |
917 | * gets fixed. | |
918 | */ | |
6740b721 JR |
919 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
920 | | NLM_F_EXCL))) { | |
921 | error = -EEXIST; | |
cd2a59e9 | 922 | goto err_unlock_ovs; |
6740b721 | 923 | } |
b21e5b6a | 924 | /* The unmasked key has to be the same for flow updates. */ |
6740b721 | 925 | if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) { |
3440e4bc AW |
926 | /* Look for any overlapping flow. */ |
927 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
928 | if (!flow) { | |
929 | error = -ENOENT; | |
930 | goto err_unlock_ovs; | |
931 | } | |
6740b721 | 932 | } |
0c9fd022 JR |
933 | /* Update actions. */ |
934 | old_acts = ovsl_dereference(flow->sf_acts); | |
935 | rcu_assign_pointer(flow->sf_acts, acts); | |
0c9fd022 | 936 | |
6740b721 | 937 | if (unlikely(reply)) { |
2c622e5a | 938 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
939 | ovs_header->dp_ifindex, |
940 | reply, info->snd_portid, | |
941 | info->snd_seq, 0, | |
942 | OVS_FLOW_CMD_NEW); | |
943 | BUG_ON(error < 0); | |
944 | } | |
945 | ovs_unlock(); | |
0c9fd022 | 946 | |
6740b721 JR |
947 | ovs_nla_free_flow_actions(old_acts); |
948 | ovs_flow_free(new_flow, false); | |
0c9fd022 | 949 | } |
6740b721 JR |
950 | |
951 | if (reply) | |
cb25142c | 952 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
0c9fd022 JR |
953 | return 0; |
954 | ||
0c9fd022 JR |
955 | err_unlock_ovs: |
956 | ovs_unlock(); | |
6740b721 JR |
957 | kfree_skb(reply); |
958 | err_kfree_acts: | |
0c9fd022 | 959 | kfree(acts); |
6740b721 JR |
960 | err_kfree_flow: |
961 | ovs_flow_free(new_flow, false); | |
0c9fd022 JR |
962 | error: |
963 | return error; | |
964 | } | |
965 | ||
cc561abf PS |
966 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
967 | static struct sw_flow_actions *get_flow_actions(const struct nlattr *a, | |
968 | const struct sw_flow_key *key, | |
9233cef7 JR |
969 | const struct sw_flow_mask *mask, |
970 | bool log) | |
cc561abf PS |
971 | { |
972 | struct sw_flow_actions *acts; | |
973 | struct sw_flow_key masked_key; | |
974 | int error; | |
975 | ||
976 | ovs_flow_mask_key(&masked_key, key, mask); | |
9233cef7 | 977 | error = ovs_nla_copy_actions(a, &masked_key, &acts, log); |
cc561abf | 978 | if (error) { |
9233cef7 | 979 | OVS_NLERR(log, |
7d16c847 | 980 | "Actions may not be safe on all matching packets"); |
cc561abf PS |
981 | return ERR_PTR(error); |
982 | } | |
983 | ||
984 | return acts; | |
985 | } | |
986 | ||
0c9fd022 JR |
987 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
988 | { | |
989 | struct nlattr **a = info->attrs; | |
990 | struct ovs_header *ovs_header = info->userhdr; | |
1d2a1b5f | 991 | struct sw_flow_key key; |
0c9fd022 JR |
992 | struct sw_flow *flow; |
993 | struct sw_flow_mask mask; | |
994 | struct sk_buff *reply = NULL; | |
995 | struct datapath *dp; | |
6740b721 | 996 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
0c9fd022 JR |
997 | struct sw_flow_match match; |
998 | int error; | |
9233cef7 | 999 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
0c9fd022 JR |
1000 | |
1001 | /* Extract key. */ | |
1002 | error = -EINVAL; | |
a473df5b | 1003 | if (!a[OVS_FLOW_ATTR_KEY]) { |
9233cef7 | 1004 | OVS_NLERR(log, "Flow key attribute not present in set flow."); |
0c9fd022 | 1005 | goto error; |
a473df5b | 1006 | } |
0c9fd022 JR |
1007 | |
1008 | ovs_match_init(&match, &key, &mask); | |
9233cef7 JR |
1009 | error = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], |
1010 | a[OVS_FLOW_ATTR_MASK], log); | |
0c9fd022 JR |
1011 | if (error) |
1012 | goto error; | |
d6569377 | 1013 | |
0c9fd022 JR |
1014 | /* Validate actions. */ |
1015 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
9233cef7 JR |
1016 | acts = get_flow_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, &mask, |
1017 | log); | |
cc561abf PS |
1018 | if (IS_ERR(acts)) { |
1019 | error = PTR_ERR(acts); | |
0c9fd022 | 1020 | goto error; |
6740b721 | 1021 | } |
6740b721 | 1022 | |
ff27161e | 1023 | /* Can allocate before locking if have acts. */ |
6740b721 JR |
1024 | reply = ovs_flow_cmd_alloc_info(acts, info, false); |
1025 | if (IS_ERR(reply)) { | |
1026 | error = PTR_ERR(reply); | |
1027 | goto err_kfree_acts; | |
90b8c2f7 | 1028 | } |
0c9fd022 JR |
1029 | } |
1030 | ||
1031 | ovs_lock(); | |
1032 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
6740b721 JR |
1033 | if (unlikely(!dp)) { |
1034 | error = -ENODEV; | |
0c9fd022 | 1035 | goto err_unlock_ovs; |
6740b721 | 1036 | } |
0c9fd022 | 1037 | /* Check that the flow exists. */ |
3440e4bc | 1038 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
6740b721 JR |
1039 | if (unlikely(!flow)) { |
1040 | error = -ENOENT; | |
0c9fd022 | 1041 | goto err_unlock_ovs; |
6740b721 | 1042 | } |
3440e4bc | 1043 | |
0c9fd022 | 1044 | /* Update actions, if present. */ |
6740b721 | 1045 | if (likely(acts)) { |
0c9fd022 JR |
1046 | old_acts = ovsl_dereference(flow->sf_acts); |
1047 | rcu_assign_pointer(flow->sf_acts, acts); | |
6740b721 JR |
1048 | |
1049 | if (unlikely(reply)) { | |
2c622e5a | 1050 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1051 | ovs_header->dp_ifindex, |
1052 | reply, info->snd_portid, | |
1053 | info->snd_seq, 0, | |
1054 | OVS_FLOW_CMD_NEW); | |
1055 | BUG_ON(error < 0); | |
1056 | } | |
1057 | } else { | |
1058 | /* Could not alloc without acts before locking. */ | |
7d16c847 | 1059 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, |
6740b721 JR |
1060 | info, OVS_FLOW_CMD_NEW, false); |
1061 | if (unlikely(IS_ERR(reply))) { | |
1062 | error = PTR_ERR(reply); | |
1063 | goto err_unlock_ovs; | |
1064 | } | |
9c52546b | 1065 | } |
0c9fd022 | 1066 | |
0c9fd022 JR |
1067 | /* Clear stats. */ |
1068 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1069 | ovs_flow_stats_clear(flow); | |
cd2a59e9 | 1070 | ovs_unlock(); |
37a1300c | 1071 | |
6740b721 | 1072 | if (reply) |
cb25142c | 1073 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
6740b721 JR |
1074 | if (old_acts) |
1075 | ovs_nla_free_flow_actions(old_acts); | |
7d16c847 | 1076 | |
d6569377 | 1077 | return 0; |
704a1e09 | 1078 | |
cd2a59e9 PS |
1079 | err_unlock_ovs: |
1080 | ovs_unlock(); | |
6740b721 JR |
1081 | kfree_skb(reply); |
1082 | err_kfree_acts: | |
ba400435 | 1083 | kfree(acts); |
37a1300c | 1084 | error: |
9c52546b | 1085 | return error; |
704a1e09 BP |
1086 | } |
1087 | ||
df2c07f4 | 1088 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1089 | { |
37a1300c | 1090 | struct nlattr **a = info->attrs; |
df2c07f4 | 1091 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1092 | struct sw_flow_key key; |
37a1300c | 1093 | struct sk_buff *reply; |
704a1e09 | 1094 | struct sw_flow *flow; |
9c52546b | 1095 | struct datapath *dp; |
a1c564be | 1096 | struct sw_flow_match match; |
9c52546b | 1097 | int err; |
9233cef7 | 1098 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
704a1e09 | 1099 | |
1b936472 | 1100 | if (!a[OVS_FLOW_ATTR_KEY]) { |
9233cef7 JR |
1101 | OVS_NLERR(log, |
1102 | "Flow get message rejected, Key attribute missing."); | |
37a1300c | 1103 | return -EINVAL; |
1b936472 | 1104 | } |
a1c564be AZ |
1105 | |
1106 | ovs_match_init(&match, &key, NULL); | |
9233cef7 | 1107 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL, log); |
37a1300c BP |
1108 | if (err) |
1109 | return err; | |
704a1e09 | 1110 | |
cd2a59e9 | 1111 | ovs_lock(); |
2a4999f3 | 1112 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1113 | if (!dp) { |
1114 | err = -ENODEV; | |
1115 | goto unlock; | |
1116 | } | |
704a1e09 | 1117 | |
3440e4bc AW |
1118 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1119 | if (!flow) { | |
cd2a59e9 PS |
1120 | err = -ENOENT; |
1121 | goto unlock; | |
1122 | } | |
d6569377 | 1123 | |
7d16c847 | 1124 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
f71db6b1 | 1125 | OVS_FLOW_CMD_NEW, true); |
cd2a59e9 PS |
1126 | if (IS_ERR(reply)) { |
1127 | err = PTR_ERR(reply); | |
1128 | goto unlock; | |
1129 | } | |
36956a7d | 1130 | |
cd2a59e9 | 1131 | ovs_unlock(); |
37a1300c | 1132 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1133 | unlock: |
1134 | ovs_unlock(); | |
1135 | return err; | |
d6569377 | 1136 | } |
9c52546b | 1137 | |
df2c07f4 | 1138 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1139 | { |
37a1300c | 1140 | struct nlattr **a = info->attrs; |
df2c07f4 | 1141 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1142 | struct sw_flow_key key; |
37a1300c | 1143 | struct sk_buff *reply; |
d6569377 | 1144 | struct sw_flow *flow; |
d6569377 | 1145 | struct datapath *dp; |
a1c564be | 1146 | struct sw_flow_match match; |
d6569377 | 1147 | int err; |
9233cef7 | 1148 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
36956a7d | 1149 | |
cde7f3ba JR |
1150 | if (likely(a[OVS_FLOW_ATTR_KEY])) { |
1151 | ovs_match_init(&match, &key, NULL); | |
9233cef7 JR |
1152 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL, |
1153 | log); | |
cde7f3ba JR |
1154 | if (unlikely(err)) |
1155 | return err; | |
1156 | } | |
1157 | ||
cd2a59e9 | 1158 | ovs_lock(); |
2a4999f3 | 1159 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cde7f3ba | 1160 | if (unlikely(!dp)) { |
cd2a59e9 PS |
1161 | err = -ENODEV; |
1162 | goto unlock; | |
1163 | } | |
7d16c847 | 1164 | |
cde7f3ba | 1165 | if (unlikely(!a[OVS_FLOW_ATTR_KEY])) { |
994dc286 | 1166 | err = ovs_flow_tbl_flush(&dp->table); |
cd2a59e9 PS |
1167 | goto unlock; |
1168 | } | |
7d16c847 | 1169 | |
3440e4bc AW |
1170 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1171 | if (unlikely(!flow)) { | |
cd2a59e9 PS |
1172 | err = -ENOENT; |
1173 | goto unlock; | |
1174 | } | |
d6569377 | 1175 | |
994dc286 | 1176 | ovs_flow_tbl_remove(&dp->table, flow); |
cde7f3ba | 1177 | ovs_unlock(); |
37a1300c | 1178 | |
46051cf8 | 1179 | reply = ovs_flow_cmd_alloc_info(rcu_dereference_raw(flow->sf_acts), |
cde7f3ba JR |
1180 | info, false); |
1181 | ||
1182 | if (likely(reply)) { | |
1183 | if (likely(!IS_ERR(reply))) { | |
7d16c847 PS |
1184 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1185 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
cde7f3ba JR |
1186 | reply, info->snd_portid, |
1187 | info->snd_seq, 0, | |
1188 | OVS_FLOW_CMD_DEL); | |
1189 | rcu_read_unlock(); | |
1190 | BUG_ON(err < 0); | |
cb25142c | 1191 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
cde7f3ba | 1192 | } else { |
cb25142c PS |
1193 | genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0, |
1194 | GROUP_ID(&ovs_dp_flow_multicast_group), PTR_ERR(reply)); | |
1195 | ||
cde7f3ba | 1196 | } |
afad3556 | 1197 | } |
37a1300c | 1198 | |
a1c564be | 1199 | ovs_flow_free(flow, true); |
37a1300c | 1200 | return 0; |
cd2a59e9 PS |
1201 | unlock: |
1202 | ovs_unlock(); | |
1203 | return err; | |
37a1300c BP |
1204 | } |
1205 | ||
df2c07f4 | 1206 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1207 | { |
df2c07f4 | 1208 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
994dc286 | 1209 | struct table_instance *ti; |
37a1300c BP |
1210 | struct datapath *dp; |
1211 | ||
f44ccce1 | 1212 | rcu_read_lock(); |
01ac0970 | 1213 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 1214 | if (!dp) { |
f44ccce1 | 1215 | rcu_read_unlock(); |
37a1300c | 1216 | return -ENODEV; |
cd2a59e9 | 1217 | } |
37a1300c | 1218 | |
994dc286 | 1219 | ti = rcu_dereference(dp->table.ti); |
37a1300c | 1220 | for (;;) { |
37a1300c BP |
1221 | struct sw_flow *flow; |
1222 | u32 bucket, obj; | |
1223 | ||
1224 | bucket = cb->args[0]; | |
1225 | obj = cb->args[1]; | |
994dc286 | 1226 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
3544358a | 1227 | if (!flow) |
37a1300c BP |
1228 | break; |
1229 | ||
2c622e5a | 1230 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
28aea917 | 1231 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1232 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1233 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1234 | break; |
1235 | ||
1236 | cb->args[0] = bucket; | |
1237 | cb->args[1] = obj; | |
1238 | } | |
f44ccce1 | 1239 | rcu_read_unlock(); |
37a1300c | 1240 | return skb->len; |
704a1e09 BP |
1241 | } |
1242 | ||
cb25142c PS |
1243 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1244 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
9233cef7 | 1245 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
cb25142c PS |
1246 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1247 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
9233cef7 | 1248 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
cb25142c PS |
1249 | }; |
1250 | ||
37a1300c | 1251 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1252 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1253 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1254 | .policy = flow_policy, | |
0c9fd022 | 1255 | .doit = ovs_flow_cmd_new |
37a1300c | 1256 | }, |
df2c07f4 | 1257 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1258 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1259 | .policy = flow_policy, | |
df2c07f4 | 1260 | .doit = ovs_flow_cmd_del |
37a1300c | 1261 | }, |
df2c07f4 | 1262 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1263 | .flags = 0, /* OK for unprivileged users. */ |
1264 | .policy = flow_policy, | |
df2c07f4 JP |
1265 | .doit = ovs_flow_cmd_get, |
1266 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1267 | }, |
df2c07f4 | 1268 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1269 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1270 | .policy = flow_policy, | |
0c9fd022 | 1271 | .doit = ovs_flow_cmd_set, |
37a1300c BP |
1272 | }, |
1273 | }; | |
1274 | ||
cb25142c | 1275 | static struct genl_family dp_flow_genl_family = { |
aaff4b55 | 1276 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1277 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1278 | .name = OVS_FLOW_FAMILY, |
1279 | .version = OVS_FLOW_VERSION, | |
1280 | .maxattr = OVS_FLOW_ATTR_MAX, | |
b3dcb73c | 1281 | .netnsok = true, |
cb25142c PS |
1282 | .parallel_ops = true, |
1283 | .ops = dp_flow_genl_ops, | |
1284 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1285 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1286 | .n_mcgrps = 1, | |
aaff4b55 BP |
1287 | }; |
1288 | ||
0afa2373 TG |
1289 | static size_t ovs_dp_cmd_msg_size(void) |
1290 | { | |
1291 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1292 | ||
1293 | msgsize += nla_total_size(IFNAMSIZ); | |
1294 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
4fa72a95 | 1295 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
300af20a | 1296 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
0afa2373 TG |
1297 | |
1298 | return msgsize; | |
1299 | } | |
1300 | ||
d637497c | 1301 | /* Called with ovs_mutex. */ |
df2c07f4 | 1302 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1303 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1304 | { |
df2c07f4 | 1305 | struct ovs_header *ovs_header; |
e926dfe3 | 1306 | struct ovs_dp_stats dp_stats; |
4fa72a95 | 1307 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
064af421 BP |
1308 | int err; |
1309 | ||
28aea917 | 1310 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1311 | flags, cmd); |
df2c07f4 | 1312 | if (!ovs_header) |
aaff4b55 | 1313 | goto error; |
064af421 | 1314 | |
b063d9f0 | 1315 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1316 | |
850b6b3b | 1317 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
064af421 | 1318 | if (err) |
d6569377 | 1319 | goto nla_put_failure; |
064af421 | 1320 | |
4fa72a95 AZ |
1321 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1322 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1323 | &dp_stats)) | |
1324 | goto nla_put_failure; | |
1325 | ||
1326 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1327 | sizeof(struct ovs_dp_megaflow_stats), | |
1328 | &dp_megaflow_stats)) | |
c3cc8c03 | 1329 | goto nla_put_failure; |
d6569377 | 1330 | |
c58cc9a4 TG |
1331 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1332 | goto nla_put_failure; | |
1333 | ||
23b48dc1 TG |
1334 | genlmsg_end(skb, ovs_header); |
1335 | return 0; | |
d6569377 BP |
1336 | |
1337 | nla_put_failure: | |
df2c07f4 | 1338 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1339 | error: |
1340 | return -EMSGSIZE; | |
d6569377 BP |
1341 | } |
1342 | ||
d81eef1b | 1343 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
d6569377 | 1344 | { |
d81eef1b | 1345 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
aaff4b55 | 1346 | } |
9dca7bd5 | 1347 | |
aa917006 | 1348 | /* Called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 1349 | static struct datapath *lookup_datapath(struct net *net, |
f1f60b85 | 1350 | const struct ovs_header *ovs_header, |
6455100f | 1351 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1352 | { |
254f2dc8 BP |
1353 | struct datapath *dp; |
1354 | ||
df2c07f4 | 1355 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1356 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1357 | else { |
d6569377 | 1358 | struct vport *vport; |
d6569377 | 1359 | |
2a4999f3 | 1360 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1361 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
d6569377 | 1362 | } |
254f2dc8 | 1363 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1364 | } |
1365 | ||
94358dcf TG |
1366 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1367 | { | |
1368 | struct datapath *dp; | |
1369 | ||
1370 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
09350a3d | 1371 | if (IS_ERR(dp)) |
94358dcf TG |
1372 | return; |
1373 | ||
1374 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1375 | dp->user_features = 0; | |
1376 | } | |
1377 | ||
f1f60b85 | 1378 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
c58cc9a4 TG |
1379 | { |
1380 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1381 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1382 | } | |
1383 | ||
df2c07f4 | 1384 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1385 | { |
aaff4b55 | 1386 | struct nlattr **a = info->attrs; |
d6569377 | 1387 | struct vport_parms parms; |
aaff4b55 | 1388 | struct sk_buff *reply; |
d6569377 BP |
1389 | struct datapath *dp; |
1390 | struct vport *vport; | |
2a4999f3 | 1391 | struct ovs_net *ovs_net; |
95b1d73a | 1392 | int err, i; |
d6569377 | 1393 | |
d6569377 | 1394 | err = -EINVAL; |
ea36840f | 1395 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1396 | goto err; |
1397 | ||
d81eef1b JR |
1398 | reply = ovs_dp_cmd_alloc_info(info); |
1399 | if (!reply) | |
1400 | return -ENOMEM; | |
d6569377 | 1401 | |
d6569377 BP |
1402 | err = -ENOMEM; |
1403 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1404 | if (dp == NULL) | |
d81eef1b | 1405 | goto err_free_reply; |
2a4999f3 | 1406 | |
0ceaa66c JG |
1407 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1408 | ||
d6569377 | 1409 | /* Allocate table. */ |
994dc286 PS |
1410 | err = ovs_flow_tbl_init(&dp->table); |
1411 | if (err) | |
d6569377 BP |
1412 | goto err_free_dp; |
1413 | ||
08fb1bbd | 1414 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
99769a40 JG |
1415 | if (!dp->stats_percpu) { |
1416 | err = -ENOMEM; | |
1417 | goto err_destroy_table; | |
1418 | } | |
1419 | ||
95b1d73a PS |
1420 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1421 | GFP_KERNEL); | |
1422 | if (!dp->ports) { | |
1423 | err = -ENOMEM; | |
1424 | goto err_destroy_percpu; | |
1425 | } | |
1426 | ||
1427 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1428 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1429 | ||
d6569377 | 1430 | /* Set up our datapath device. */ |
df2c07f4 JP |
1431 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1432 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1433 | parms.options = NULL; |
1434 | parms.dp = dp; | |
df2c07f4 | 1435 | parms.port_no = OVSP_LOCAL; |
beb1c69a | 1436 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
b063d9f0 | 1437 | |
c58cc9a4 TG |
1438 | ovs_dp_change(dp, a); |
1439 | ||
d81eef1b JR |
1440 | /* So far only local changes have been made, now need the lock. */ |
1441 | ovs_lock(); | |
1442 | ||
d6569377 BP |
1443 | vport = new_vport(&parms); |
1444 | if (IS_ERR(vport)) { | |
1445 | err = PTR_ERR(vport); | |
1446 | if (err == -EBUSY) | |
1447 | err = -EEXIST; | |
1448 | ||
94358dcf TG |
1449 | if (err == -EEXIST) { |
1450 | /* An outdated user space instance that does not understand | |
1451 | * the concept of user_features has attempted to create a new | |
1452 | * datapath and is likely to reuse it. Drop all user features. | |
1453 | */ | |
1454 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1455 | ovs_dp_reset_user_features(skb, info); | |
1456 | } | |
1457 | ||
95b1d73a | 1458 | goto err_destroy_ports_array; |
d6569377 | 1459 | } |
d6569377 | 1460 | |
d81eef1b JR |
1461 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1462 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1463 | BUG_ON(err < 0); | |
aaff4b55 | 1464 | |
2a4999f3 | 1465 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1466 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
cd2a59e9 | 1467 | ovs_unlock(); |
d6569377 | 1468 | |
cb25142c | 1469 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
d6569377 BP |
1470 | return 0; |
1471 | ||
95b1d73a | 1472 | err_destroy_ports_array: |
d81eef1b | 1473 | ovs_unlock(); |
95b1d73a | 1474 | kfree(dp->ports); |
99769a40 JG |
1475 | err_destroy_percpu: |
1476 | free_percpu(dp->stats_percpu); | |
d6569377 | 1477 | err_destroy_table: |
e379e4d1 | 1478 | ovs_flow_tbl_destroy(&dp->table); |
d6569377 | 1479 | err_free_dp: |
0ceaa66c | 1480 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1481 | kfree(dp); |
d81eef1b JR |
1482 | err_free_reply: |
1483 | kfree_skb(reply); | |
d6569377 | 1484 | err: |
064af421 BP |
1485 | return err; |
1486 | } | |
1487 | ||
cd2a59e9 | 1488 | /* Called with ovs_mutex. */ |
2a4999f3 | 1489 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1490 | { |
95b1d73a | 1491 | int i; |
44e05eca | 1492 | |
95b1d73a PS |
1493 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1494 | struct vport *vport; | |
f8dfbcb7 | 1495 | struct hlist_node *n; |
95b1d73a | 1496 | |
f8dfbcb7 | 1497 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1498 | if (vport->port_no != OVSP_LOCAL) |
1499 | ovs_dp_detach_port(vport); | |
1500 | } | |
ed099e92 | 1501 | |
fb93e9aa | 1502 | list_del_rcu(&dp->list_node); |
ed099e92 | 1503 | |
cd2a59e9 | 1504 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
d103f479 AZ |
1505 | * all ports in datapath are destroyed first before freeing datapath. |
1506 | */ | |
cd2a59e9 | 1507 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
99620d2c | 1508 | |
d103f479 | 1509 | /* RCU destroy the flow table */ |
ed099e92 | 1510 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1511 | } |
1512 | ||
1513 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1514 | { | |
1515 | struct sk_buff *reply; | |
1516 | struct datapath *dp; | |
1517 | int err; | |
1518 | ||
d81eef1b JR |
1519 | reply = ovs_dp_cmd_alloc_info(info); |
1520 | if (!reply) | |
1521 | return -ENOMEM; | |
1522 | ||
cd2a59e9 | 1523 | ovs_lock(); |
2a4999f3 PS |
1524 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1525 | err = PTR_ERR(dp); | |
1526 | if (IS_ERR(dp)) | |
d81eef1b | 1527 | goto err_unlock_free; |
2a4999f3 | 1528 | |
d81eef1b JR |
1529 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1530 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1531 | BUG_ON(err < 0); | |
2a4999f3 PS |
1532 | |
1533 | __dp_destroy(dp); | |
d81eef1b | 1534 | ovs_unlock(); |
7d16c847 | 1535 | |
cb25142c | 1536 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
99620d2c | 1537 | return 0; |
d81eef1b JR |
1538 | |
1539 | err_unlock_free: | |
cd2a59e9 | 1540 | ovs_unlock(); |
d81eef1b | 1541 | kfree_skb(reply); |
cd2a59e9 | 1542 | return err; |
44e05eca BP |
1543 | } |
1544 | ||
df2c07f4 | 1545 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1546 | { |
aaff4b55 | 1547 | struct sk_buff *reply; |
d6569377 | 1548 | struct datapath *dp; |
d6569377 | 1549 | int err; |
064af421 | 1550 | |
d81eef1b JR |
1551 | reply = ovs_dp_cmd_alloc_info(info); |
1552 | if (!reply) | |
1553 | return -ENOMEM; | |
1554 | ||
cd2a59e9 | 1555 | ovs_lock(); |
2a4999f3 | 1556 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1557 | err = PTR_ERR(dp); |
d6569377 | 1558 | if (IS_ERR(dp)) |
d81eef1b | 1559 | goto err_unlock_free; |
38c6ecbc | 1560 | |
c58cc9a4 TG |
1561 | ovs_dp_change(dp, info->attrs); |
1562 | ||
d81eef1b JR |
1563 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1564 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1565 | BUG_ON(err < 0); | |
cd2a59e9 | 1566 | ovs_unlock(); |
7d16c847 | 1567 | |
cb25142c | 1568 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
aaff4b55 | 1569 | return 0; |
d81eef1b JR |
1570 | |
1571 | err_unlock_free: | |
cd2a59e9 | 1572 | ovs_unlock(); |
d81eef1b | 1573 | kfree_skb(reply); |
cd2a59e9 | 1574 | return err; |
064af421 BP |
1575 | } |
1576 | ||
df2c07f4 | 1577 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1578 | { |
aaff4b55 | 1579 | struct sk_buff *reply; |
d6569377 | 1580 | struct datapath *dp; |
d6569377 | 1581 | int err; |
1dcf111b | 1582 | |
d81eef1b JR |
1583 | reply = ovs_dp_cmd_alloc_info(info); |
1584 | if (!reply) | |
1585 | return -ENOMEM; | |
1586 | ||
d637497c | 1587 | ovs_lock(); |
2a4999f3 | 1588 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1589 | if (IS_ERR(dp)) { |
1590 | err = PTR_ERR(dp); | |
d81eef1b | 1591 | goto err_unlock_free; |
cd2a59e9 | 1592 | } |
d81eef1b JR |
1593 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1594 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1595 | BUG_ON(err < 0); | |
d637497c | 1596 | ovs_unlock(); |
aaff4b55 BP |
1597 | |
1598 | return genlmsg_reply(reply, info); | |
cd2a59e9 | 1599 | |
d81eef1b | 1600 | err_unlock_free: |
d637497c | 1601 | ovs_unlock(); |
d81eef1b | 1602 | kfree_skb(reply); |
cd2a59e9 | 1603 | return err; |
1dcf111b JP |
1604 | } |
1605 | ||
df2c07f4 | 1606 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1607 | { |
2a4999f3 | 1608 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1609 | struct datapath *dp; |
1610 | int skip = cb->args[0]; | |
1611 | int i = 0; | |
a7786963 | 1612 | |
d637497c PS |
1613 | ovs_lock(); |
1614 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1615 | if (i >= skip && |
28aea917 | 1616 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1617 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1618 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1619 | break; |
254f2dc8 | 1620 | i++; |
a7786963 | 1621 | } |
d637497c | 1622 | ovs_unlock(); |
aaff4b55 | 1623 | |
254f2dc8 BP |
1624 | cb->args[0] = i; |
1625 | ||
aaff4b55 | 1626 | return skb->len; |
c19e6535 BP |
1627 | } |
1628 | ||
cb25142c PS |
1629 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1630 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1631 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1632 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1633 | }; | |
1634 | ||
aaff4b55 | 1635 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1636 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1637 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1638 | .policy = datapath_policy, | |
df2c07f4 | 1639 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1640 | }, |
df2c07f4 | 1641 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1642 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1643 | .policy = datapath_policy, | |
df2c07f4 | 1644 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1645 | }, |
df2c07f4 | 1646 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1647 | .flags = 0, /* OK for unprivileged users. */ |
1648 | .policy = datapath_policy, | |
df2c07f4 JP |
1649 | .doit = ovs_dp_cmd_get, |
1650 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1651 | }, |
df2c07f4 | 1652 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1653 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1654 | .policy = datapath_policy, | |
df2c07f4 | 1655 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1656 | }, |
1657 | }; | |
1658 | ||
cb25142c | 1659 | static struct genl_family dp_datapath_genl_family = { |
f0fef760 | 1660 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1661 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1662 | .name = OVS_DATAPATH_FAMILY, |
1663 | .version = OVS_DATAPATH_VERSION, | |
1664 | .maxattr = OVS_DP_ATTR_MAX, | |
b3dcb73c | 1665 | .netnsok = true, |
cb25142c PS |
1666 | .parallel_ops = true, |
1667 | .ops = dp_datapath_genl_ops, | |
1668 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1669 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1670 | .n_mcgrps = 1, | |
f0fef760 BP |
1671 | }; |
1672 | ||
cd2a59e9 | 1673 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1674 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1675 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1676 | { |
df2c07f4 | 1677 | struct ovs_header *ovs_header; |
e926dfe3 | 1678 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1679 | int err; |
1680 | ||
28aea917 | 1681 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1682 | flags, cmd); |
df2c07f4 | 1683 | if (!ovs_header) |
f0fef760 | 1684 | return -EMSGSIZE; |
c19e6535 | 1685 | |
99769a40 | 1686 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1687 | |
c3cc8c03 DM |
1688 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1689 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
beb1c69a | 1690 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport))) |
c3cc8c03 | 1691 | goto nla_put_failure; |
c19e6535 | 1692 | |
850b6b3b | 1693 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1694 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1695 | &vport_stats)) | |
1696 | goto nla_put_failure; | |
c19e6535 | 1697 | |
beb1c69a AW |
1698 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1699 | goto nla_put_failure; | |
1700 | ||
850b6b3b | 1701 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1702 | if (err == -EMSGSIZE) |
1703 | goto error; | |
c19e6535 | 1704 | |
23b48dc1 TG |
1705 | genlmsg_end(skb, ovs_header); |
1706 | return 0; | |
c19e6535 BP |
1707 | |
1708 | nla_put_failure: | |
1709 | err = -EMSGSIZE; | |
f0fef760 | 1710 | error: |
df2c07f4 | 1711 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1712 | return err; |
064af421 BP |
1713 | } |
1714 | ||
d81eef1b JR |
1715 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1716 | { | |
1717 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1718 | } | |
1719 | ||
1720 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
28aea917 | 1721 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 1722 | u32 seq, u8 cmd) |
064af421 | 1723 | { |
c19e6535 | 1724 | struct sk_buff *skb; |
f0fef760 | 1725 | int retval; |
c19e6535 | 1726 | |
f0fef760 | 1727 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1728 | if (!skb) |
1729 | return ERR_PTR(-ENOMEM); | |
1730 | ||
28aea917 | 1731 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
1732 | BUG_ON(retval < 0); |
1733 | ||
c19e6535 | 1734 | return skb; |
f0fef760 | 1735 | } |
c19e6535 | 1736 | |
cd2a59e9 | 1737 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 | 1738 | static struct vport *lookup_vport(struct net *net, |
f1f60b85 | 1739 | const struct ovs_header *ovs_header, |
df2c07f4 | 1740 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1741 | { |
1742 | struct datapath *dp; | |
1743 | struct vport *vport; | |
1744 | ||
df2c07f4 | 1745 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1746 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1747 | if (!vport) |
c19e6535 | 1748 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1749 | if (ovs_header->dp_ifindex && |
1750 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1751 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1752 | return vport; |
df2c07f4 JP |
1753 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1754 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1755 | |
1756 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1757 | return ERR_PTR(-EFBIG); |
c19e6535 | 1758 | |
2a4999f3 | 1759 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1760 | if (!dp) |
1761 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1762 | |
cd2a59e9 | 1763 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 1764 | if (!vport) |
17535c57 | 1765 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1766 | return vport; |
1767 | } else | |
1768 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1769 | } |
1770 | ||
df2c07f4 | 1771 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1772 | { |
f0fef760 | 1773 | struct nlattr **a = info->attrs; |
df2c07f4 | 1774 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1775 | struct vport_parms parms; |
ed099e92 | 1776 | struct sk_buff *reply; |
c19e6535 | 1777 | struct vport *vport; |
c19e6535 | 1778 | struct datapath *dp; |
b0ec0f27 | 1779 | u32 port_no; |
c19e6535 | 1780 | int err; |
b0ec0f27 | 1781 | |
ea36840f BP |
1782 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1783 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
d81eef1b JR |
1784 | return -EINVAL; |
1785 | ||
1786 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1787 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1788 | if (port_no >= DP_MAX_PORTS) | |
1789 | return -EFBIG; | |
1790 | ||
1791 | reply = ovs_vport_cmd_alloc_info(); | |
1792 | if (!reply) | |
1793 | return -ENOMEM; | |
f0fef760 | 1794 | |
cd2a59e9 | 1795 | ovs_lock(); |
2a4999f3 | 1796 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1797 | err = -ENODEV; |
1798 | if (!dp) | |
d81eef1b | 1799 | goto exit_unlock_free; |
c19e6535 | 1800 | |
d81eef1b | 1801 | if (port_no) { |
cd2a59e9 | 1802 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1803 | err = -EBUSY; |
1804 | if (vport) | |
d81eef1b | 1805 | goto exit_unlock_free; |
c19e6535 BP |
1806 | } else { |
1807 | for (port_no = 1; ; port_no++) { | |
1808 | if (port_no >= DP_MAX_PORTS) { | |
1809 | err = -EFBIG; | |
d81eef1b | 1810 | goto exit_unlock_free; |
c19e6535 | 1811 | } |
cd2a59e9 | 1812 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1813 | if (!vport) |
1814 | break; | |
51d4d598 | 1815 | } |
064af421 | 1816 | } |
b0ec0f27 | 1817 | |
df2c07f4 JP |
1818 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1819 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1820 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1821 | parms.dp = dp; |
1822 | parms.port_no = port_no; | |
beb1c69a | 1823 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
c19e6535 BP |
1824 | |
1825 | vport = new_vport(&parms); | |
1826 | err = PTR_ERR(vport); | |
1827 | if (IS_ERR(vport)) | |
d81eef1b | 1828 | goto exit_unlock_free; |
c19e6535 | 1829 | |
d81eef1b JR |
1830 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1831 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1832 | BUG_ON(err < 0); | |
1833 | ovs_unlock(); | |
e297c6b7 | 1834 | |
cb25142c | 1835 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 1836 | return 0; |
c19e6535 | 1837 | |
d81eef1b | 1838 | exit_unlock_free: |
cd2a59e9 | 1839 | ovs_unlock(); |
d81eef1b | 1840 | kfree_skb(reply); |
c19e6535 | 1841 | return err; |
44e05eca BP |
1842 | } |
1843 | ||
df2c07f4 | 1844 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1845 | { |
f0fef760 BP |
1846 | struct nlattr **a = info->attrs; |
1847 | struct sk_buff *reply; | |
c19e6535 | 1848 | struct vport *vport; |
c19e6535 | 1849 | int err; |
44e05eca | 1850 | |
d81eef1b JR |
1851 | reply = ovs_vport_cmd_alloc_info(); |
1852 | if (!reply) | |
1853 | return -ENOMEM; | |
1854 | ||
cd2a59e9 | 1855 | ovs_lock(); |
2a4999f3 | 1856 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
1857 | err = PTR_ERR(vport); |
1858 | if (IS_ERR(vport)) | |
d81eef1b | 1859 | goto exit_unlock_free; |
44e05eca | 1860 | |
6455100f | 1861 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 1862 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 1863 | err = -EINVAL; |
d81eef1b | 1864 | goto exit_unlock_free; |
c25ea534 JG |
1865 | } |
1866 | ||
17ec1d04 | 1867 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 1868 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 | 1869 | if (err) |
d81eef1b | 1870 | goto exit_unlock_free; |
17ec1d04 | 1871 | } |
1fc7083d | 1872 | |
beb1c69a | 1873 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { |
7d16c847 PS |
1874 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
1875 | ||
1876 | err = ovs_vport_set_upcall_portids(vport, ids); | |
beb1c69a AW |
1877 | if (err) |
1878 | goto exit_unlock_free; | |
1879 | } | |
c19e6535 | 1880 | |
c25ea534 JG |
1881 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1882 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1883 | BUG_ON(err < 0); | |
cd2a59e9 | 1884 | ovs_unlock(); |
d81eef1b | 1885 | |
cb25142c | 1886 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
c25ea534 JG |
1887 | return 0; |
1888 | ||
d81eef1b | 1889 | exit_unlock_free: |
cd2a59e9 | 1890 | ovs_unlock(); |
d81eef1b | 1891 | kfree_skb(reply); |
c19e6535 | 1892 | return err; |
064af421 BP |
1893 | } |
1894 | ||
df2c07f4 | 1895 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1896 | { |
f0fef760 BP |
1897 | struct nlattr **a = info->attrs; |
1898 | struct sk_buff *reply; | |
c19e6535 | 1899 | struct vport *vport; |
c19e6535 BP |
1900 | int err; |
1901 | ||
d81eef1b JR |
1902 | reply = ovs_vport_cmd_alloc_info(); |
1903 | if (!reply) | |
1904 | return -ENOMEM; | |
1905 | ||
cd2a59e9 | 1906 | ovs_lock(); |
2a4999f3 | 1907 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 1908 | err = PTR_ERR(vport); |
f0fef760 | 1909 | if (IS_ERR(vport)) |
d81eef1b | 1910 | goto exit_unlock_free; |
c19e6535 | 1911 | |
df2c07f4 | 1912 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 | 1913 | err = -EINVAL; |
d81eef1b | 1914 | goto exit_unlock_free; |
f0fef760 BP |
1915 | } |
1916 | ||
d81eef1b JR |
1917 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1918 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
1919 | BUG_ON(err < 0); | |
850b6b3b | 1920 | ovs_dp_detach_port(vport); |
d81eef1b | 1921 | ovs_unlock(); |
f0fef760 | 1922 | |
cb25142c | 1923 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 1924 | return 0; |
f0fef760 | 1925 | |
d81eef1b | 1926 | exit_unlock_free: |
cd2a59e9 | 1927 | ovs_unlock(); |
d81eef1b | 1928 | kfree_skb(reply); |
c19e6535 | 1929 | return err; |
7c40efc9 BP |
1930 | } |
1931 | ||
df2c07f4 | 1932 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1933 | { |
f0fef760 | 1934 | struct nlattr **a = info->attrs; |
df2c07f4 | 1935 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 1936 | struct sk_buff *reply; |
c19e6535 | 1937 | struct vport *vport; |
c19e6535 BP |
1938 | int err; |
1939 | ||
d81eef1b JR |
1940 | reply = ovs_vport_cmd_alloc_info(); |
1941 | if (!reply) | |
1942 | return -ENOMEM; | |
1943 | ||
ed099e92 | 1944 | rcu_read_lock(); |
2a4999f3 | 1945 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
1946 | err = PTR_ERR(vport); |
1947 | if (IS_ERR(vport)) | |
d81eef1b JR |
1948 | goto exit_unlock_free; |
1949 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
1950 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1951 | BUG_ON(err < 0); | |
df2fa9b5 JG |
1952 | rcu_read_unlock(); |
1953 | ||
1954 | return genlmsg_reply(reply, info); | |
ed099e92 | 1955 | |
d81eef1b | 1956 | exit_unlock_free: |
ed099e92 | 1957 | rcu_read_unlock(); |
d81eef1b | 1958 | kfree_skb(reply); |
c19e6535 BP |
1959 | return err; |
1960 | } | |
1961 | ||
df2c07f4 | 1962 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 1963 | { |
df2c07f4 | 1964 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 1965 | struct datapath *dp; |
95b1d73a PS |
1966 | int bucket = cb->args[0], skip = cb->args[1]; |
1967 | int i, j = 0; | |
c19e6535 | 1968 | |
03fc2881 | 1969 | rcu_read_lock(); |
01ac0970 | 1970 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
03fc2881 JR |
1971 | if (!dp) { |
1972 | rcu_read_unlock(); | |
f0fef760 | 1973 | return -ENODEV; |
03fc2881 | 1974 | } |
95b1d73a | 1975 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 1976 | struct vport *vport; |
95b1d73a PS |
1977 | |
1978 | j = 0; | |
f8dfbcb7 | 1979 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
1980 | if (j >= skip && |
1981 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 1982 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
1983 | cb->nlh->nlmsg_seq, |
1984 | NLM_F_MULTI, | |
1985 | OVS_VPORT_CMD_NEW) < 0) | |
1986 | goto out; | |
1987 | ||
1988 | j++; | |
1989 | } | |
1990 | skip = 0; | |
c19e6535 | 1991 | } |
95b1d73a | 1992 | out: |
ed099e92 | 1993 | rcu_read_unlock(); |
c19e6535 | 1994 | |
95b1d73a PS |
1995 | cb->args[0] = i; |
1996 | cb->args[1] = j; | |
f0fef760 | 1997 | |
95b1d73a | 1998 | return skb->len; |
7c40efc9 BP |
1999 | } |
2000 | ||
cb25142c PS |
2001 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2002 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2003 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2004 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2005 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2006 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2007 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2008 | }; | |
2009 | ||
f0fef760 | 2010 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2011 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
2012 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2013 | .policy = vport_policy, | |
df2c07f4 | 2014 | .doit = ovs_vport_cmd_new |
f0fef760 | 2015 | }, |
df2c07f4 | 2016 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
2017 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2018 | .policy = vport_policy, | |
df2c07f4 | 2019 | .doit = ovs_vport_cmd_del |
f0fef760 | 2020 | }, |
df2c07f4 | 2021 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2022 | .flags = 0, /* OK for unprivileged users. */ |
2023 | .policy = vport_policy, | |
df2c07f4 JP |
2024 | .doit = ovs_vport_cmd_get, |
2025 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2026 | }, |
df2c07f4 | 2027 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
2028 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2029 | .policy = vport_policy, | |
df2c07f4 | 2030 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2031 | }, |
2032 | }; | |
2033 | ||
cb25142c PS |
2034 | struct genl_family dp_vport_genl_family = { |
2035 | .id = GENL_ID_GENERATE, | |
2036 | .hdrsize = sizeof(struct ovs_header), | |
2037 | .name = OVS_VPORT_FAMILY, | |
2038 | .version = OVS_VPORT_VERSION, | |
2039 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2040 | .netnsok = true, | |
2041 | .parallel_ops = true, | |
2042 | .ops = dp_vport_genl_ops, | |
2043 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2044 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2045 | .n_mcgrps = 1, | |
982b8810 | 2046 | }; |
ed099e92 | 2047 | |
cb25142c PS |
2048 | static struct genl_family *dp_genl_families[] = { |
2049 | &dp_datapath_genl_family, | |
2050 | &dp_vport_genl_family, | |
2051 | &dp_flow_genl_family, | |
2052 | &dp_packet_genl_family, | |
982b8810 | 2053 | }; |
ed099e92 | 2054 | |
982b8810 BP |
2055 | static void dp_unregister_genl(int n_families) |
2056 | { | |
2057 | int i; | |
ed099e92 | 2058 | |
b867ca75 | 2059 | for (i = 0; i < n_families; i++) |
cb25142c | 2060 | genl_unregister_family(dp_genl_families[i]); |
ed099e92 BP |
2061 | } |
2062 | ||
982b8810 | 2063 | static int dp_register_genl(void) |
064af421 | 2064 | { |
982b8810 BP |
2065 | int err; |
2066 | int i; | |
064af421 | 2067 | |
982b8810 | 2068 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
064af421 | 2069 | |
cb25142c | 2070 | err = genl_register_family(dp_genl_families[i]); |
982b8810 BP |
2071 | if (err) |
2072 | goto error; | |
982b8810 | 2073 | } |
9cc8b4e4 | 2074 | |
982b8810 | 2075 | return 0; |
064af421 BP |
2076 | |
2077 | error: | |
cb25142c | 2078 | dp_unregister_genl(i); |
982b8810 | 2079 | return err; |
064af421 BP |
2080 | } |
2081 | ||
2a4999f3 PS |
2082 | static int __net_init ovs_init_net(struct net *net) |
2083 | { | |
2084 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2085 | ||
2086 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 2087 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
2a4999f3 PS |
2088 | return 0; |
2089 | } | |
2090 | ||
cabd5516 PS |
2091 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2092 | struct list_head *head) | |
2a4999f3 PS |
2093 | { |
2094 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
cabd5516 PS |
2095 | struct datapath *dp; |
2096 | ||
2097 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2098 | int i; | |
2099 | ||
2100 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2101 | struct vport *vport; | |
2102 | ||
2103 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
2104 | struct netdev_vport *netdev_vport; | |
2105 | ||
2106 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) | |
2107 | continue; | |
2108 | ||
2109 | netdev_vport = netdev_vport_priv(vport); | |
2110 | if (dev_net(netdev_vport->dev) == dnet) | |
2111 | list_add(&vport->detach_list, head); | |
2112 | } | |
2113 | } | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2118 | { | |
2119 | struct datapath *dp, *dp_next; | |
2120 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2121 | struct vport *vport, *vport_next; | |
2122 | struct net *net; | |
2123 | LIST_HEAD(head); | |
2a4999f3 | 2124 | |
cd2a59e9 PS |
2125 | ovs_lock(); |
2126 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2127 | __dp_destroy(dp); | |
cabd5516 PS |
2128 | |
2129 | rtnl_lock(); | |
2130 | for_each_net(net) | |
2131 | list_vports_from_net(net, dnet, &head); | |
2132 | rtnl_unlock(); | |
2133 | ||
2134 | /* Detach all vports from given namespace. */ | |
2135 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2136 | list_del(&vport->detach_list); | |
2137 | ovs_dp_detach_port(vport); | |
2138 | } | |
2139 | ||
cd2a59e9 PS |
2140 | ovs_unlock(); |
2141 | ||
2142 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
2143 | } |
2144 | ||
2145 | static struct pernet_operations ovs_net_ops = { | |
2146 | .init = ovs_init_net, | |
2147 | .exit = ovs_exit_net, | |
2148 | .id = &ovs_net_id, | |
2149 | .size = sizeof(struct ovs_net), | |
2150 | }; | |
2151 | ||
637c8268 PS |
2152 | DEFINE_COMPAT_PNET_REG_FUNC(device); |
2153 | ||
22d24ebf BP |
2154 | static int __init dp_init(void) |
2155 | { | |
2156 | int err; | |
2157 | ||
f3d85db3 | 2158 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2159 | |
dc5f3fef | 2160 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 2161 | VERSION); |
064af421 | 2162 | |
2c8c4fb7 | 2163 | err = action_fifos_init(); |
3544358a | 2164 | if (err) |
533e96e7 | 2165 | goto error; |
3544358a | 2166 | |
5282e284 | 2167 | err = ovs_internal_dev_rtnl_link_register(); |
2c8c4fb7 AZ |
2168 | if (err) |
2169 | goto error_action_fifos_exit; | |
2170 | ||
5282e284 TG |
2171 | err = ovs_flow_init(); |
2172 | if (err) | |
2173 | goto error_unreg_rtnl_link; | |
2174 | ||
850b6b3b | 2175 | err = ovs_vport_init(); |
064af421 BP |
2176 | if (err) |
2177 | goto error_flow_exit; | |
2178 | ||
2a4999f3 | 2179 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2180 | if (err) |
2181 | goto error_vport_exit; | |
2182 | ||
2a4999f3 PS |
2183 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2184 | if (err) | |
2185 | goto error_netns_exit; | |
2186 | ||
982b8810 BP |
2187 | err = dp_register_genl(); |
2188 | if (err < 0) | |
37a1300c | 2189 | goto error_unreg_notifier; |
982b8810 | 2190 | |
064af421 BP |
2191 | return 0; |
2192 | ||
2193 | error_unreg_notifier: | |
850b6b3b | 2194 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2195 | error_netns_exit: |
2196 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2197 | error_vport_exit: |
850b6b3b | 2198 | ovs_vport_exit(); |
064af421 | 2199 | error_flow_exit: |
850b6b3b | 2200 | ovs_flow_exit(); |
5282e284 TG |
2201 | error_unreg_rtnl_link: |
2202 | ovs_internal_dev_rtnl_link_unregister(); | |
2c8c4fb7 AZ |
2203 | error_action_fifos_exit: |
2204 | action_fifos_exit(); | |
064af421 BP |
2205 | error: |
2206 | return err; | |
2207 | } | |
2208 | ||
2209 | static void dp_cleanup(void) | |
2210 | { | |
982b8810 | 2211 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
850b6b3b | 2212 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2213 | unregister_pernet_device(&ovs_net_ops); |
2214 | rcu_barrier(); | |
850b6b3b JG |
2215 | ovs_vport_exit(); |
2216 | ovs_flow_exit(); | |
5282e284 | 2217 | ovs_internal_dev_rtnl_link_unregister(); |
2c8c4fb7 | 2218 | action_fifos_exit(); |
064af421 BP |
2219 | } |
2220 | ||
2221 | module_init(dp_init); | |
2222 | module_exit(dp_cleanup); | |
2223 | ||
2224 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2225 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2226 | MODULE_VERSION(VERSION); |