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ccb1352e | 1 | /* |
ad552007 | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
ccb1352e JG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
20 | ||
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/if_arp.h> | |
24 | #include <linux/if_vlan.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
27 | #include <linux/jhash.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
31 | #include <linux/genetlink.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/kthread.h> | |
34 | #include <linux/mutex.h> | |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
ccb1352e JG |
39 | #include <linux/ethtool.h> |
40 | #include <linux/wait.h> | |
ccb1352e JG |
41 | #include <asm/div64.h> |
42 | #include <linux/highmem.h> | |
43 | #include <linux/netfilter_bridge.h> | |
44 | #include <linux/netfilter_ipv4.h> | |
45 | #include <linux/inetdevice.h> | |
46 | #include <linux/list.h> | |
47 | #include <linux/openvswitch.h> | |
48 | #include <linux/rculist.h> | |
49 | #include <linux/dmi.h> | |
ccb1352e | 50 | #include <net/genetlink.h> |
46df7b81 PS |
51 | #include <net/net_namespace.h> |
52 | #include <net/netns/generic.h> | |
ccb1352e JG |
53 | |
54 | #include "datapath.h" | |
55 | #include "flow.h" | |
e80857cc | 56 | #include "flow_table.h" |
e6445719 | 57 | #include "flow_netlink.h" |
ccb1352e | 58 | #include "vport-internal_dev.h" |
cff63a52 | 59 | #include "vport-netdev.h" |
ccb1352e | 60 | |
8e4e1713 | 61 | int ovs_net_id __read_mostly; |
9ba559d9 | 62 | EXPORT_SYMBOL_GPL(ovs_net_id); |
8e4e1713 | 63 | |
0c200ef9 PS |
64 | static struct genl_family dp_packet_genl_family; |
65 | static struct genl_family dp_flow_genl_family; | |
66 | static struct genl_family dp_datapath_genl_family; | |
67 | ||
74ed7ab9 JS |
68 | static const struct nla_policy flow_policy[]; |
69 | ||
48e48a70 | 70 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
71 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
72 | }; |
73 | ||
48e48a70 | 74 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
75 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
76 | }; |
77 | ||
48e48a70 | 78 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
79 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
80 | }; |
81 | ||
fb5d1e9e JR |
82 | /* Check if need to build a reply message. |
83 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
84 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
85 | unsigned int group) | |
fb5d1e9e JR |
86 | { |
87 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
f8403a2e | 88 | genl_has_listeners(family, genl_info_net(info), group); |
fb5d1e9e JR |
89 | } |
90 | ||
68eb5503 | 91 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 92 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 93 | { |
68eb5503 | 94 | genl_notify(family, skb, genl_info_net(info), info->snd_portid, |
2a94fe48 | 95 | 0, info->nlhdr, GFP_KERNEL); |
ed661185 TG |
96 | } |
97 | ||
ccb1352e JG |
98 | /** |
99 | * DOC: Locking: | |
100 | * | |
8e4e1713 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. | |
ccb1352e JG |
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. | |
8e4e1713 PS |
111 | * |
112 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
113 | */ |
114 | ||
8e4e1713 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 | } | |
9ba559d9 | 135 | EXPORT_SYMBOL_GPL(lockdep_ovsl_is_held); |
8e4e1713 PS |
136 | #endif |
137 | ||
ccb1352e | 138 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 139 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 140 | const struct sw_flow_key *, |
ccb1352e | 141 | const struct dp_upcall_info *); |
8055a89c | 142 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 143 | const struct sw_flow_key *, |
ccb1352e JG |
144 | const struct dp_upcall_info *); |
145 | ||
cc3a5ae6 AZ |
146 | /* Must be called with rcu_read_lock. */ |
147 | static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex) | |
ccb1352e | 148 | { |
cc3a5ae6 | 149 | struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex); |
ccb1352e | 150 | |
ccb1352e JG |
151 | if (dev) { |
152 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
153 | if (vport) | |
cc3a5ae6 | 154 | return vport->dp; |
ccb1352e | 155 | } |
cc3a5ae6 AZ |
156 | |
157 | return NULL; | |
158 | } | |
159 | ||
160 | /* The caller must hold either ovs_mutex or rcu_read_lock to keep the | |
161 | * returned dp pointer valid. | |
162 | */ | |
163 | static inline struct datapath *get_dp(struct net *net, int dp_ifindex) | |
164 | { | |
165 | struct datapath *dp; | |
166 | ||
167 | WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); | |
168 | rcu_read_lock(); | |
169 | dp = get_dp_rcu(net, dp_ifindex); | |
ccb1352e JG |
170 | rcu_read_unlock(); |
171 | ||
172 | return dp; | |
173 | } | |
174 | ||
8e4e1713 | 175 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 176 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 177 | { |
8e4e1713 | 178 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
ccb1352e JG |
179 | return vport->ops->get_name(vport); |
180 | } | |
181 | ||
12eb18f7 | 182 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
183 | { |
184 | struct vport *local; | |
185 | int ifindex; | |
186 | ||
187 | rcu_read_lock(); | |
188 | ||
15eac2a7 | 189 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 190 | if (local) |
cff63a52 | 191 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
ccb1352e JG |
192 | else |
193 | ifindex = 0; | |
194 | ||
195 | rcu_read_unlock(); | |
196 | ||
197 | return ifindex; | |
198 | } | |
199 | ||
200 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
201 | { | |
202 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
203 | ||
9b996e54 | 204 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 205 | free_percpu(dp->stats_percpu); |
15eac2a7 | 206 | kfree(dp->ports); |
ccb1352e JG |
207 | kfree(dp); |
208 | } | |
209 | ||
15eac2a7 PS |
210 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
211 | u16 port_no) | |
212 | { | |
213 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
214 | } | |
215 | ||
bb6f9a70 | 216 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
217 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
218 | { | |
219 | struct vport *vport; | |
15eac2a7 PS |
220 | struct hlist_head *head; |
221 | ||
222 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 223 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
224 | if (vport->port_no == port_no) |
225 | return vport; | |
226 | } | |
227 | return NULL; | |
228 | } | |
229 | ||
8e4e1713 | 230 | /* Called with ovs_mutex. */ |
ccb1352e JG |
231 | static struct vport *new_vport(const struct vport_parms *parms) |
232 | { | |
233 | struct vport *vport; | |
234 | ||
235 | vport = ovs_vport_add(parms); | |
236 | if (!IS_ERR(vport)) { | |
237 | struct datapath *dp = parms->dp; | |
15eac2a7 | 238 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 239 | |
15eac2a7 | 240 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 241 | } |
ccb1352e JG |
242 | return vport; |
243 | } | |
244 | ||
ccb1352e JG |
245 | void ovs_dp_detach_port(struct vport *p) |
246 | { | |
8e4e1713 | 247 | ASSERT_OVSL(); |
ccb1352e JG |
248 | |
249 | /* First drop references to device. */ | |
15eac2a7 | 250 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
251 | |
252 | /* Then destroy it. */ | |
253 | ovs_vport_del(p); | |
254 | } | |
255 | ||
256 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 257 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 258 | { |
83c8df26 | 259 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
260 | struct datapath *dp = p->dp; |
261 | struct sw_flow *flow; | |
d98612b8 | 262 | struct sw_flow_actions *sf_acts; |
ccb1352e | 263 | struct dp_stats_percpu *stats; |
ccb1352e | 264 | u64 *stats_counter; |
1bd7116f | 265 | u32 n_mask_hit; |
ccb1352e | 266 | |
404f2f10 | 267 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 268 | |
ccb1352e | 269 | /* Look up flow. */ |
8c8b1b83 | 270 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit); |
ccb1352e JG |
271 | if (unlikely(!flow)) { |
272 | struct dp_upcall_info upcall; | |
8c8b1b83 | 273 | int error; |
ccb1352e | 274 | |
ccea7445 | 275 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 276 | upcall.cmd = OVS_PACKET_CMD_MISS; |
5cd667b0 | 277 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
e8eedb85 | 278 | error = ovs_dp_upcall(dp, skb, key, &upcall); |
c5eba0b6 LR |
279 | if (unlikely(error)) |
280 | kfree_skb(skb); | |
281 | else | |
282 | consume_skb(skb); | |
ccb1352e JG |
283 | stats_counter = &stats->n_missed; |
284 | goto out; | |
285 | } | |
286 | ||
d98612b8 LJ |
287 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
288 | sf_acts = rcu_dereference(flow->sf_acts); | |
289 | ovs_execute_actions(dp, skb, sf_acts, key); | |
ccb1352e | 290 | |
e298e505 | 291 | stats_counter = &stats->n_hit; |
ccb1352e JG |
292 | |
293 | out: | |
294 | /* Update datapath statistics. */ | |
df9d9fdf | 295 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 296 | (*stats_counter)++; |
1bd7116f | 297 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 298 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
299 | } |
300 | ||
ccb1352e | 301 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 302 | const struct sw_flow_key *key, |
46df7b81 | 303 | const struct dp_upcall_info *upcall_info) |
ccb1352e JG |
304 | { |
305 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
306 | int err; |
307 | ||
15e47304 | 308 | if (upcall_info->portid == 0) { |
ccb1352e JG |
309 | err = -ENOTCONN; |
310 | goto err; | |
311 | } | |
312 | ||
ccb1352e | 313 | if (!skb_is_gso(skb)) |
e8eedb85 | 314 | err = queue_userspace_packet(dp, skb, key, upcall_info); |
ccb1352e | 315 | else |
e8eedb85 | 316 | err = queue_gso_packets(dp, skb, key, upcall_info); |
ccb1352e JG |
317 | if (err) |
318 | goto err; | |
319 | ||
320 | return 0; | |
321 | ||
322 | err: | |
404f2f10 | 323 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 324 | |
df9d9fdf | 325 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 326 | stats->n_lost++; |
df9d9fdf | 327 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
328 | |
329 | return err; | |
330 | } | |
331 | ||
8055a89c | 332 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 333 | const struct sw_flow_key *key, |
ccb1352e JG |
334 | const struct dp_upcall_info *upcall_info) |
335 | { | |
a1b5d0dd | 336 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
ccb1352e JG |
337 | struct sw_flow_key later_key; |
338 | struct sk_buff *segs, *nskb; | |
e8eedb85 | 339 | struct ovs_skb_cb ovs_cb; |
ccb1352e JG |
340 | int err; |
341 | ||
e8eedb85 | 342 | ovs_cb = *OVS_CB(skb); |
09c5e605 | 343 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
e8eedb85 | 344 | *OVS_CB(skb) = ovs_cb; |
92e5dfc3 PS |
345 | if (IS_ERR(segs)) |
346 | return PTR_ERR(segs); | |
330966e5 FW |
347 | if (segs == NULL) |
348 | return -EINVAL; | |
ccb1352e | 349 | |
e8eedb85 PS |
350 | if (gso_type & SKB_GSO_UDP) { |
351 | /* The initial flow key extracted by ovs_flow_key_extract() | |
352 | * in this case is for a first fragment, so we need to | |
353 | * properly mark later fragments. | |
354 | */ | |
355 | later_key = *key; | |
356 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
357 | } | |
358 | ||
ccb1352e JG |
359 | /* Queue all of the segments. */ |
360 | skb = segs; | |
361 | do { | |
e8eedb85 PS |
362 | *OVS_CB(skb) = ovs_cb; |
363 | if (gso_type & SKB_GSO_UDP && skb != segs) | |
364 | key = &later_key; | |
365 | ||
366 | err = queue_userspace_packet(dp, skb, key, upcall_info); | |
ccb1352e JG |
367 | if (err) |
368 | break; | |
369 | ||
ccb1352e JG |
370 | } while ((skb = skb->next)); |
371 | ||
372 | /* Free all of the segments. */ | |
373 | skb = segs; | |
374 | do { | |
375 | nskb = skb->next; | |
376 | if (err) | |
377 | kfree_skb(skb); | |
378 | else | |
379 | consume_skb(skb); | |
380 | } while ((skb = nskb)); | |
381 | return err; | |
382 | } | |
383 | ||
8f0aad6f | 384 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
bda56f14 | 385 | unsigned int hdrlen) |
c3ff8cfe TG |
386 | { |
387 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 388 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
41af73e9 | 389 | + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
c3ff8cfe TG |
390 | |
391 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
392 | if (upcall_info->userdata) |
393 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
394 | ||
395 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
396 | if (upcall_info->egress_tun_info) | |
397 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 398 | |
ccea7445 NM |
399 | /* OVS_PACKET_ATTR_ACTIONS */ |
400 | if (upcall_info->actions_len) | |
401 | size += nla_total_size(upcall_info->actions_len); | |
402 | ||
c3ff8cfe TG |
403 | return size; |
404 | } | |
405 | ||
8055a89c | 406 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 407 | const struct sw_flow_key *key, |
ccb1352e JG |
408 | const struct dp_upcall_info *upcall_info) |
409 | { | |
410 | struct ovs_header *upcall; | |
411 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 412 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 413 | struct nlattr *nla; |
795449d8 | 414 | struct genl_info info = { |
8055a89c | 415 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
795449d8 TG |
416 | .snd_portid = upcall_info->portid, |
417 | }; | |
418 | size_t len; | |
bda56f14 | 419 | unsigned int hlen; |
8055a89c TG |
420 | int err, dp_ifindex; |
421 | ||
422 | dp_ifindex = get_dpifindex(dp); | |
423 | if (!dp_ifindex) | |
424 | return -ENODEV; | |
ccb1352e | 425 | |
df8a39de | 426 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
427 | nskb = skb_clone(skb, GFP_ATOMIC); |
428 | if (!nskb) | |
429 | return -ENOMEM; | |
430 | ||
5968250c | 431 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 432 | if (!nskb) |
ccb1352e JG |
433 | return -ENOMEM; |
434 | ||
ccb1352e JG |
435 | skb = nskb; |
436 | } | |
437 | ||
438 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
439 | err = -EFBIG; | |
440 | goto out; | |
441 | } | |
442 | ||
bda56f14 TG |
443 | /* Complete checksum if needed */ |
444 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
445 | (err = skb_checksum_help(skb))) | |
446 | goto out; | |
447 | ||
448 | /* Older versions of OVS user space enforce alignment of the last | |
449 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
450 | * padding logic. Only perform zerocopy if padding is not required. | |
451 | */ | |
452 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
453 | hlen = skb_zerocopy_headlen(skb); | |
454 | else | |
455 | hlen = skb->len; | |
456 | ||
8f0aad6f | 457 | len = upcall_msg_size(upcall_info, hlen); |
795449d8 | 458 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
ccb1352e JG |
459 | if (!user_skb) { |
460 | err = -ENOMEM; | |
461 | goto out; | |
462 | } | |
463 | ||
464 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
465 | 0, upcall_info->cmd); | |
466 | upcall->dp_ifindex = dp_ifindex; | |
467 | ||
5b4237bb | 468 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
f53e3831 | 469 | BUG_ON(err); |
ccb1352e JG |
470 | |
471 | if (upcall_info->userdata) | |
4490108b BP |
472 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
473 | nla_len(upcall_info->userdata), | |
474 | nla_data(upcall_info->userdata)); | |
ccb1352e | 475 | |
8f0aad6f WZ |
476 | if (upcall_info->egress_tun_info) { |
477 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
478 | err = ovs_nla_put_egress_tunnel_key(user_skb, | |
479 | upcall_info->egress_tun_info); | |
480 | BUG_ON(err); | |
481 | nla_nest_end(user_skb, nla); | |
482 | } | |
483 | ||
ccea7445 NM |
484 | if (upcall_info->actions_len) { |
485 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS); | |
486 | err = ovs_nla_put_actions(upcall_info->actions, | |
487 | upcall_info->actions_len, | |
488 | user_skb); | |
489 | if (!err) | |
490 | nla_nest_end(user_skb, nla); | |
491 | else | |
492 | nla_nest_cancel(user_skb, nla); | |
493 | } | |
494 | ||
bda56f14 TG |
495 | /* Only reserve room for attribute header, packet data is added |
496 | * in skb_zerocopy() */ | |
497 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
498 | err = -ENOBUFS; | |
499 | goto out; | |
500 | } | |
501 | nla->nla_len = nla_attr_size(skb->len); | |
ccb1352e | 502 | |
36d5fe6a ZK |
503 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
504 | if (err) | |
505 | goto out; | |
ccb1352e | 506 | |
aea0bb4f TG |
507 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
508 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
509 | size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len; | |
510 | ||
511 | if (plen > 0) | |
512 | memset(skb_put(user_skb, plen), 0, plen); | |
513 | } | |
514 | ||
bda56f14 | 515 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 516 | |
bda56f14 | 517 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 518 | user_skb = NULL; |
ccb1352e | 519 | out: |
36d5fe6a ZK |
520 | if (err) |
521 | skb_tx_error(skb); | |
4ee45ea0 | 522 | kfree_skb(user_skb); |
ccb1352e JG |
523 | kfree_skb(nskb); |
524 | return err; | |
525 | } | |
526 | ||
ccb1352e JG |
527 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
528 | { | |
529 | struct ovs_header *ovs_header = info->userhdr; | |
530 | struct nlattr **a = info->attrs; | |
531 | struct sw_flow_actions *acts; | |
532 | struct sk_buff *packet; | |
533 | struct sw_flow *flow; | |
d98612b8 | 534 | struct sw_flow_actions *sf_acts; |
ccb1352e JG |
535 | struct datapath *dp; |
536 | struct ethhdr *eth; | |
83c8df26 | 537 | struct vport *input_vport; |
ccb1352e JG |
538 | int len; |
539 | int err; | |
1ba39804 | 540 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
541 | |
542 | err = -EINVAL; | |
543 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 544 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
545 | goto err; |
546 | ||
547 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
548 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
549 | err = -ENOMEM; | |
550 | if (!packet) | |
551 | goto err; | |
552 | skb_reserve(packet, NET_IP_ALIGN); | |
553 | ||
32686a9d | 554 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e JG |
555 | |
556 | skb_reset_mac_header(packet); | |
557 | eth = eth_hdr(packet); | |
558 | ||
559 | /* Normally, setting the skb 'protocol' field would be handled by a | |
560 | * call to eth_type_trans(), but it assumes there's a sending | |
561 | * device, which we may not have. */ | |
6713fc9b | 562 | if (eth_proto_is_802_3(eth->h_proto)) |
ccb1352e JG |
563 | packet->protocol = eth->h_proto; |
564 | else | |
565 | packet->protocol = htons(ETH_P_802_2); | |
566 | ||
567 | /* Build an sw_flow for sending this packet. */ | |
23dabf88 | 568 | flow = ovs_flow_alloc(); |
ccb1352e JG |
569 | err = PTR_ERR(flow); |
570 | if (IS_ERR(flow)) | |
571 | goto err_kfree_skb; | |
572 | ||
83c8df26 | 573 | err = ovs_flow_key_extract_userspace(a[OVS_PACKET_ATTR_KEY], packet, |
05da5898 | 574 | &flow->key, log); |
ccb1352e JG |
575 | if (err) |
576 | goto err_flow_free; | |
577 | ||
e6445719 | 578 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 579 | &flow->key, &acts, log); |
74f84a57 PS |
580 | if (err) |
581 | goto err_flow_free; | |
ccb1352e | 582 | |
f5796684 | 583 | rcu_assign_pointer(flow->sf_acts, acts); |
f5796684 | 584 | OVS_CB(packet)->egress_tun_info = NULL; |
ccb1352e | 585 | packet->priority = flow->key.phy.priority; |
39c7caeb | 586 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
587 | |
588 | rcu_read_lock(); | |
cc3a5ae6 | 589 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
590 | err = -ENODEV; |
591 | if (!dp) | |
592 | goto err_unlock; | |
593 | ||
83c8df26 PS |
594 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
595 | if (!input_vport) | |
596 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
597 | ||
598 | if (!input_vport) | |
599 | goto err_unlock; | |
600 | ||
601 | OVS_CB(packet)->input_vport = input_vport; | |
d98612b8 | 602 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 603 | |
ccb1352e | 604 | local_bh_disable(); |
d98612b8 | 605 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
606 | local_bh_enable(); |
607 | rcu_read_unlock(); | |
608 | ||
03f0d916 | 609 | ovs_flow_free(flow, false); |
ccb1352e JG |
610 | return err; |
611 | ||
612 | err_unlock: | |
613 | rcu_read_unlock(); | |
614 | err_flow_free: | |
03f0d916 | 615 | ovs_flow_free(flow, false); |
ccb1352e JG |
616 | err_kfree_skb: |
617 | kfree_skb(packet); | |
618 | err: | |
619 | return err; | |
620 | } | |
621 | ||
622 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 623 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
624 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
625 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 626 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
ccb1352e JG |
627 | }; |
628 | ||
4534de83 | 629 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e JG |
630 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
631 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
632 | .policy = packet_policy, | |
633 | .doit = ovs_packet_cmd_execute | |
634 | } | |
635 | }; | |
636 | ||
0c200ef9 PS |
637 | static struct genl_family dp_packet_genl_family = { |
638 | .id = GENL_ID_GENERATE, | |
639 | .hdrsize = sizeof(struct ovs_header), | |
640 | .name = OVS_PACKET_FAMILY, | |
641 | .version = OVS_PACKET_VERSION, | |
642 | .maxattr = OVS_PACKET_ATTR_MAX, | |
643 | .netnsok = true, | |
644 | .parallel_ops = true, | |
645 | .ops = dp_packet_genl_ops, | |
646 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
647 | }; | |
648 | ||
12eb18f7 | 649 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 650 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
651 | { |
652 | int i; | |
ccb1352e | 653 | |
1bd7116f AZ |
654 | memset(mega_stats, 0, sizeof(*mega_stats)); |
655 | ||
b637e498 | 656 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 657 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
658 | |
659 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 660 | |
ccb1352e JG |
661 | for_each_possible_cpu(i) { |
662 | const struct dp_stats_percpu *percpu_stats; | |
663 | struct dp_stats_percpu local_stats; | |
664 | unsigned int start; | |
665 | ||
666 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
667 | ||
668 | do { | |
57a7744e | 669 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 670 | local_stats = *percpu_stats; |
57a7744e | 671 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
672 | |
673 | stats->n_hit += local_stats.n_hit; | |
674 | stats->n_missed += local_stats.n_missed; | |
675 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 676 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
677 | } |
678 | } | |
679 | ||
74ed7ab9 JS |
680 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
681 | { | |
682 | return ovs_identifier_is_ufid(sfid) && | |
683 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
684 | } | |
685 | ||
686 | static bool should_fill_mask(uint32_t ufid_flags) | |
687 | { | |
688 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
689 | } | |
690 | ||
691 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 692 | { |
74ed7ab9 JS |
693 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
694 | } | |
695 | ||
696 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
697 | const struct sw_flow_id *sfid, | |
698 | uint32_t ufid_flags) | |
699 | { | |
700 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
701 | ||
702 | /* OVS_FLOW_ATTR_UFID */ | |
703 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
704 | len += nla_total_size(sfid->ufid_len); | |
705 | ||
706 | /* OVS_FLOW_ATTR_KEY */ | |
707 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
708 | len += nla_total_size(ovs_key_attr_size()); | |
709 | ||
710 | /* OVS_FLOW_ATTR_MASK */ | |
711 | if (should_fill_mask(ufid_flags)) | |
712 | len += nla_total_size(ovs_key_attr_size()); | |
713 | ||
714 | /* OVS_FLOW_ATTR_ACTIONS */ | |
715 | if (should_fill_actions(ufid_flags)) | |
716 | len += nla_total_size(acts->actions_len); | |
717 | ||
718 | return len | |
c3ff8cfe TG |
719 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
720 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
74ed7ab9 | 721 | + nla_total_size(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
722 | } |
723 | ||
ca7105f2 JS |
724 | /* Called with ovs_mutex or RCU read lock. */ |
725 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
726 | struct sk_buff *skb) | |
727 | { | |
728 | struct ovs_flow_stats stats; | |
729 | __be16 tcp_flags; | |
730 | unsigned long used; | |
ccb1352e | 731 | |
e298e505 | 732 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 733 | |
028d6a67 DM |
734 | if (used && |
735 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
ca7105f2 | 736 | return -EMSGSIZE; |
ccb1352e | 737 | |
028d6a67 | 738 | if (stats.n_packets && |
e298e505 | 739 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) |
ca7105f2 | 740 | return -EMSGSIZE; |
ccb1352e | 741 | |
e298e505 PS |
742 | if ((u8)ntohs(tcp_flags) && |
743 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
744 | return -EMSGSIZE; |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
749 | /* Called with ovs_mutex or RCU read lock. */ | |
750 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
751 | struct sk_buff *skb, int skb_orig_len) | |
752 | { | |
753 | struct nlattr *start; | |
754 | int err; | |
ccb1352e JG |
755 | |
756 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
757 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
758 | * Netlink but individual action lists can be longer than | |
759 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
760 | * The userspace caller can always fetch the actions separately if it | |
761 | * really wants them. (Most userspace callers in fact don't care.) | |
762 | * | |
763 | * This can only fail for dump operations because the skb is always | |
764 | * properly sized for single flows. | |
765 | */ | |
74f84a57 PS |
766 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
767 | if (start) { | |
d57170b1 PS |
768 | const struct sw_flow_actions *sf_acts; |
769 | ||
663efa36 | 770 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
771 | err = ovs_nla_put_actions(sf_acts->actions, |
772 | sf_acts->actions_len, skb); | |
0e9796b4 | 773 | |
74f84a57 PS |
774 | if (!err) |
775 | nla_nest_end(skb, start); | |
776 | else { | |
777 | if (skb_orig_len) | |
ca7105f2 | 778 | return err; |
74f84a57 PS |
779 | |
780 | nla_nest_cancel(skb, start); | |
781 | } | |
ca7105f2 JS |
782 | } else if (skb_orig_len) { |
783 | return -EMSGSIZE; | |
784 | } | |
785 | ||
786 | return 0; | |
787 | } | |
788 | ||
789 | /* Called with ovs_mutex or RCU read lock. */ | |
790 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
791 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 792 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
793 | { |
794 | const int skb_orig_len = skb->len; | |
795 | struct ovs_header *ovs_header; | |
796 | int err; | |
797 | ||
798 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
799 | flags, cmd); | |
800 | if (!ovs_header) | |
801 | return -EMSGSIZE; | |
802 | ||
803 | ovs_header->dp_ifindex = dp_ifindex; | |
804 | ||
74ed7ab9 | 805 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
806 | if (err) |
807 | goto error; | |
808 | ||
74ed7ab9 JS |
809 | if (should_fill_key(&flow->id, ufid_flags)) { |
810 | err = ovs_nla_put_masked_key(flow, skb); | |
811 | if (err) | |
812 | goto error; | |
813 | } | |
814 | ||
815 | if (should_fill_mask(ufid_flags)) { | |
816 | err = ovs_nla_put_mask(flow, skb); | |
817 | if (err) | |
818 | goto error; | |
819 | } | |
ca7105f2 JS |
820 | |
821 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
822 | if (err) | |
823 | goto error; | |
824 | ||
74ed7ab9 JS |
825 | if (should_fill_actions(ufid_flags)) { |
826 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
827 | if (err) | |
828 | goto error; | |
829 | } | |
ccb1352e | 830 | |
053c095a JB |
831 | genlmsg_end(skb, ovs_header); |
832 | return 0; | |
ccb1352e | 833 | |
ccb1352e JG |
834 | error: |
835 | genlmsg_cancel(skb, ovs_header); | |
836 | return err; | |
837 | } | |
838 | ||
0e9796b4 JR |
839 | /* May not be called with RCU read lock. */ |
840 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 841 | const struct sw_flow_id *sfid, |
fb5d1e9e | 842 | struct genl_info *info, |
74ed7ab9 JS |
843 | bool always, |
844 | uint32_t ufid_flags) | |
ccb1352e | 845 | { |
fb5d1e9e | 846 | struct sk_buff *skb; |
74ed7ab9 | 847 | size_t len; |
ccb1352e | 848 | |
9b67aa4a | 849 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
850 | return NULL; |
851 | ||
74ed7ab9 JS |
852 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
853 | skb = genlmsg_new_unicast(len, info, GFP_KERNEL); | |
fb5d1e9e JR |
854 | if (!skb) |
855 | return ERR_PTR(-ENOMEM); | |
856 | ||
857 | return skb; | |
ccb1352e JG |
858 | } |
859 | ||
0e9796b4 JR |
860 | /* Called with ovs_mutex. */ |
861 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
862 | int dp_ifindex, | |
863 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 864 | bool always, u32 ufid_flags) |
ccb1352e JG |
865 | { |
866 | struct sk_buff *skb; | |
867 | int retval; | |
868 | ||
74ed7ab9 JS |
869 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
870 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 871 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 872 | return skb; |
ccb1352e | 873 | |
0e9796b4 JR |
874 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
875 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 876 | cmd, ufid_flags); |
ccb1352e JG |
877 | BUG_ON(retval < 0); |
878 | return skb; | |
879 | } | |
880 | ||
37bdc87b | 881 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e JG |
882 | { |
883 | struct nlattr **a = info->attrs; | |
884 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 885 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 886 | struct sw_flow_mask mask; |
ccb1352e JG |
887 | struct sk_buff *reply; |
888 | struct datapath *dp; | |
74ed7ab9 | 889 | struct sw_flow_key key; |
37bdc87b | 890 | struct sw_flow_actions *acts; |
03f0d916 | 891 | struct sw_flow_match match; |
74ed7ab9 | 892 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 893 | int error; |
05da5898 | 894 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 895 | |
893f139b | 896 | /* Must have key and actions. */ |
ccb1352e | 897 | error = -EINVAL; |
426cda5c | 898 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 899 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 900 | goto error; |
426cda5c JG |
901 | } |
902 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 903 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 904 | goto error; |
426cda5c | 905 | } |
03f0d916 | 906 | |
893f139b JR |
907 | /* Most of the time we need to allocate a new flow, do it before |
908 | * locking. | |
909 | */ | |
910 | new_flow = ovs_flow_alloc(); | |
911 | if (IS_ERR(new_flow)) { | |
912 | error = PTR_ERR(new_flow); | |
913 | goto error; | |
914 | } | |
915 | ||
916 | /* Extract key. */ | |
74ed7ab9 | 917 | ovs_match_init(&match, &key, &mask); |
05da5898 JR |
918 | error = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], |
919 | a[OVS_FLOW_ATTR_MASK], log); | |
ccb1352e | 920 | if (error) |
893f139b | 921 | goto err_kfree_flow; |
ccb1352e | 922 | |
74ed7ab9 JS |
923 | ovs_flow_mask_key(&new_flow->key, &key, &mask); |
924 | ||
925 | /* Extract flow identifier. */ | |
926 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
927 | &key, log); | |
928 | if (error) | |
929 | goto err_kfree_flow; | |
74f84a57 | 930 | |
893f139b | 931 | /* Validate actions. */ |
893f139b | 932 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key, |
05da5898 | 933 | &acts, log); |
37bdc87b | 934 | if (error) { |
05da5898 | 935 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 936 | goto err_kfree_flow; |
893f139b JR |
937 | } |
938 | ||
74ed7ab9 JS |
939 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
940 | ufid_flags); | |
893f139b JR |
941 | if (IS_ERR(reply)) { |
942 | error = PTR_ERR(reply); | |
943 | goto err_kfree_acts; | |
ccb1352e JG |
944 | } |
945 | ||
8e4e1713 | 946 | ovs_lock(); |
46df7b81 | 947 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
893f139b JR |
948 | if (unlikely(!dp)) { |
949 | error = -ENODEV; | |
8e4e1713 | 950 | goto err_unlock_ovs; |
893f139b | 951 | } |
74ed7ab9 | 952 | |
03f0d916 | 953 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
954 | if (ovs_identifier_is_ufid(&new_flow->id)) |
955 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
956 | if (!flow) | |
957 | flow = ovs_flow_tbl_lookup(&dp->table, &key); | |
893f139b JR |
958 | if (likely(!flow)) { |
959 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
960 | |
961 | /* Put flow in bucket. */ | |
893f139b JR |
962 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
963 | if (unlikely(error)) { | |
618ed0c8 | 964 | acts = NULL; |
893f139b JR |
965 | goto err_unlock_ovs; |
966 | } | |
967 | ||
968 | if (unlikely(reply)) { | |
969 | error = ovs_flow_cmd_fill_info(new_flow, | |
970 | ovs_header->dp_ifindex, | |
971 | reply, info->snd_portid, | |
972 | info->snd_seq, 0, | |
74ed7ab9 JS |
973 | OVS_FLOW_CMD_NEW, |
974 | ufid_flags); | |
893f139b | 975 | BUG_ON(error < 0); |
618ed0c8 | 976 | } |
893f139b | 977 | ovs_unlock(); |
ccb1352e | 978 | } else { |
37bdc87b JR |
979 | struct sw_flow_actions *old_acts; |
980 | ||
ccb1352e JG |
981 | /* Bail out if we're not allowed to modify an existing flow. |
982 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
983 | * because Generic Netlink treats the latter as a dump | |
984 | * request. We also accept NLM_F_EXCL in case that bug ever | |
985 | * gets fixed. | |
986 | */ | |
893f139b JR |
987 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
988 | | NLM_F_EXCL))) { | |
989 | error = -EEXIST; | |
8e4e1713 | 990 | goto err_unlock_ovs; |
893f139b | 991 | } |
74ed7ab9 JS |
992 | /* The flow identifier has to be the same for flow updates. |
993 | * Look for any overlapping flow. | |
994 | */ | |
995 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
996 | if (ovs_identifier_is_key(&flow->id)) | |
997 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
998 | &match); | |
999 | else /* UFID matches but key is different */ | |
1000 | flow = NULL; | |
4a46b24e AW |
1001 | if (!flow) { |
1002 | error = -ENOENT; | |
1003 | goto err_unlock_ovs; | |
1004 | } | |
893f139b | 1005 | } |
37bdc87b JR |
1006 | /* Update actions. */ |
1007 | old_acts = ovsl_dereference(flow->sf_acts); | |
1008 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1009 | |
893f139b JR |
1010 | if (unlikely(reply)) { |
1011 | error = ovs_flow_cmd_fill_info(flow, | |
1012 | ovs_header->dp_ifindex, | |
1013 | reply, info->snd_portid, | |
1014 | info->snd_seq, 0, | |
74ed7ab9 JS |
1015 | OVS_FLOW_CMD_NEW, |
1016 | ufid_flags); | |
893f139b JR |
1017 | BUG_ON(error < 0); |
1018 | } | |
1019 | ovs_unlock(); | |
37bdc87b | 1020 | |
893f139b JR |
1021 | ovs_nla_free_flow_actions(old_acts); |
1022 | ovs_flow_free(new_flow, false); | |
37bdc87b | 1023 | } |
893f139b JR |
1024 | |
1025 | if (reply) | |
1026 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1027 | return 0; |
1028 | ||
37bdc87b JR |
1029 | err_unlock_ovs: |
1030 | ovs_unlock(); | |
893f139b JR |
1031 | kfree_skb(reply); |
1032 | err_kfree_acts: | |
37bdc87b | 1033 | kfree(acts); |
893f139b JR |
1034 | err_kfree_flow: |
1035 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1036 | error: |
1037 | return error; | |
1038 | } | |
ccb1352e | 1039 | |
2fdb957d | 1040 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
6b205b2c JG |
1041 | static struct sw_flow_actions *get_flow_actions(const struct nlattr *a, |
1042 | const struct sw_flow_key *key, | |
05da5898 JR |
1043 | const struct sw_flow_mask *mask, |
1044 | bool log) | |
6b205b2c JG |
1045 | { |
1046 | struct sw_flow_actions *acts; | |
1047 | struct sw_flow_key masked_key; | |
1048 | int error; | |
1049 | ||
6b205b2c | 1050 | ovs_flow_mask_key(&masked_key, key, mask); |
05da5898 | 1051 | error = ovs_nla_copy_actions(a, &masked_key, &acts, log); |
6b205b2c | 1052 | if (error) { |
05da5898 JR |
1053 | OVS_NLERR(log, |
1054 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1055 | return ERR_PTR(error); |
1056 | } | |
1057 | ||
1058 | return acts; | |
1059 | } | |
1060 | ||
37bdc87b JR |
1061 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1062 | { | |
1063 | struct nlattr **a = info->attrs; | |
1064 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1065 | struct sw_flow_key key; |
37bdc87b JR |
1066 | struct sw_flow *flow; |
1067 | struct sw_flow_mask mask; | |
1068 | struct sk_buff *reply = NULL; | |
1069 | struct datapath *dp; | |
893f139b | 1070 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1071 | struct sw_flow_match match; |
74ed7ab9 JS |
1072 | struct sw_flow_id sfid; |
1073 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
37bdc87b | 1074 | int error; |
05da5898 | 1075 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1076 | bool ufid_present; |
37bdc87b JR |
1077 | |
1078 | /* Extract key. */ | |
1079 | error = -EINVAL; | |
426cda5c | 1080 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 1081 | OVS_NLERR(log, "Flow key attribute not present in set flow."); |
37bdc87b | 1082 | goto error; |
426cda5c | 1083 | } |
37bdc87b | 1084 | |
74ed7ab9 | 1085 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
37bdc87b | 1086 | ovs_match_init(&match, &key, &mask); |
05da5898 JR |
1087 | error = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], |
1088 | a[OVS_FLOW_ATTR_MASK], log); | |
37bdc87b JR |
1089 | if (error) |
1090 | goto error; | |
1091 | ||
1092 | /* Validate actions. */ | |
1093 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 JR |
1094 | acts = get_flow_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, &mask, |
1095 | log); | |
6b205b2c JG |
1096 | if (IS_ERR(acts)) { |
1097 | error = PTR_ERR(acts); | |
37bdc87b | 1098 | goto error; |
893f139b | 1099 | } |
893f139b | 1100 | |
2fdb957d | 1101 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1102 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1103 | ufid_flags); | |
893f139b JR |
1104 | if (IS_ERR(reply)) { |
1105 | error = PTR_ERR(reply); | |
1106 | goto err_kfree_acts; | |
be52c9e9 | 1107 | } |
37bdc87b | 1108 | } |
0e9796b4 | 1109 | |
37bdc87b JR |
1110 | ovs_lock(); |
1111 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
893f139b JR |
1112 | if (unlikely(!dp)) { |
1113 | error = -ENODEV; | |
37bdc87b | 1114 | goto err_unlock_ovs; |
893f139b | 1115 | } |
37bdc87b | 1116 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1117 | if (ufid_present) |
1118 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1119 | else | |
1120 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1121 | if (unlikely(!flow)) { |
1122 | error = -ENOENT; | |
37bdc87b | 1123 | goto err_unlock_ovs; |
893f139b | 1124 | } |
4a46b24e | 1125 | |
37bdc87b | 1126 | /* Update actions, if present. */ |
893f139b | 1127 | if (likely(acts)) { |
37bdc87b JR |
1128 | old_acts = ovsl_dereference(flow->sf_acts); |
1129 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1130 | |
1131 | if (unlikely(reply)) { | |
1132 | error = ovs_flow_cmd_fill_info(flow, | |
1133 | ovs_header->dp_ifindex, | |
1134 | reply, info->snd_portid, | |
1135 | info->snd_seq, 0, | |
74ed7ab9 JS |
1136 | OVS_FLOW_CMD_NEW, |
1137 | ufid_flags); | |
893f139b JR |
1138 | BUG_ON(error < 0); |
1139 | } | |
1140 | } else { | |
1141 | /* Could not alloc without acts before locking. */ | |
1142 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
74ed7ab9 JS |
1143 | info, OVS_FLOW_CMD_NEW, false, |
1144 | ufid_flags); | |
1145 | ||
893f139b JR |
1146 | if (unlikely(IS_ERR(reply))) { |
1147 | error = PTR_ERR(reply); | |
1148 | goto err_unlock_ovs; | |
1149 | } | |
ccb1352e | 1150 | } |
37bdc87b | 1151 | |
37bdc87b JR |
1152 | /* Clear stats. */ |
1153 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1154 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1155 | ovs_unlock(); |
ccb1352e | 1156 | |
893f139b JR |
1157 | if (reply) |
1158 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1159 | if (old_acts) | |
1160 | ovs_nla_free_flow_actions(old_acts); | |
fb5d1e9e | 1161 | |
ccb1352e JG |
1162 | return 0; |
1163 | ||
8e4e1713 PS |
1164 | err_unlock_ovs: |
1165 | ovs_unlock(); | |
893f139b JR |
1166 | kfree_skb(reply); |
1167 | err_kfree_acts: | |
74f84a57 | 1168 | kfree(acts); |
ccb1352e JG |
1169 | error: |
1170 | return error; | |
1171 | } | |
1172 | ||
1173 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1174 | { | |
1175 | struct nlattr **a = info->attrs; | |
1176 | struct ovs_header *ovs_header = info->userhdr; | |
1177 | struct sw_flow_key key; | |
1178 | struct sk_buff *reply; | |
1179 | struct sw_flow *flow; | |
1180 | struct datapath *dp; | |
03f0d916 | 1181 | struct sw_flow_match match; |
74ed7ab9 JS |
1182 | struct sw_flow_id ufid; |
1183 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1184 | int err = 0; | |
05da5898 | 1185 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1186 | bool ufid_present; |
ccb1352e | 1187 | |
74ed7ab9 JS |
1188 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1189 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1190 | ovs_match_init(&match, &key, NULL); | |
1191 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL, | |
1192 | log); | |
1193 | } else if (!ufid_present) { | |
05da5898 JR |
1194 | OVS_NLERR(log, |
1195 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1196 | err = -EINVAL; |
03f0d916 | 1197 | } |
ccb1352e JG |
1198 | if (err) |
1199 | return err; | |
1200 | ||
8e4e1713 | 1201 | ovs_lock(); |
46df7b81 | 1202 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1203 | if (!dp) { |
1204 | err = -ENODEV; | |
1205 | goto unlock; | |
1206 | } | |
ccb1352e | 1207 | |
74ed7ab9 JS |
1208 | if (ufid_present) |
1209 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1210 | else | |
1211 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1212 | if (!flow) { |
8e4e1713 PS |
1213 | err = -ENOENT; |
1214 | goto unlock; | |
1215 | } | |
ccb1352e | 1216 | |
0e9796b4 | 1217 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
74ed7ab9 | 1218 | OVS_FLOW_CMD_NEW, true, ufid_flags); |
8e4e1713 PS |
1219 | if (IS_ERR(reply)) { |
1220 | err = PTR_ERR(reply); | |
1221 | goto unlock; | |
1222 | } | |
ccb1352e | 1223 | |
8e4e1713 | 1224 | ovs_unlock(); |
ccb1352e | 1225 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1226 | unlock: |
1227 | ovs_unlock(); | |
1228 | return err; | |
ccb1352e JG |
1229 | } |
1230 | ||
1231 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1232 | { | |
1233 | struct nlattr **a = info->attrs; | |
1234 | struct ovs_header *ovs_header = info->userhdr; | |
1235 | struct sw_flow_key key; | |
1236 | struct sk_buff *reply; | |
74ed7ab9 | 1237 | struct sw_flow *flow = NULL; |
ccb1352e | 1238 | struct datapath *dp; |
03f0d916 | 1239 | struct sw_flow_match match; |
74ed7ab9 JS |
1240 | struct sw_flow_id ufid; |
1241 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1242 | int err; |
05da5898 | 1243 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1244 | bool ufid_present; |
ccb1352e | 1245 | |
74ed7ab9 JS |
1246 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1247 | if (a[OVS_FLOW_ATTR_KEY]) { | |
aed06778 | 1248 | ovs_match_init(&match, &key, NULL); |
05da5898 JR |
1249 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL, |
1250 | log); | |
aed06778 JR |
1251 | if (unlikely(err)) |
1252 | return err; | |
1253 | } | |
1254 | ||
8e4e1713 | 1255 | ovs_lock(); |
46df7b81 | 1256 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1257 | if (unlikely(!dp)) { |
8e4e1713 PS |
1258 | err = -ENODEV; |
1259 | goto unlock; | |
1260 | } | |
46df7b81 | 1261 | |
74ed7ab9 | 1262 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1263 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1264 | goto unlock; |
1265 | } | |
03f0d916 | 1266 | |
74ed7ab9 JS |
1267 | if (ufid_present) |
1268 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1269 | else | |
1270 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1271 | if (unlikely(!flow)) { |
8e4e1713 PS |
1272 | err = -ENOENT; |
1273 | goto unlock; | |
1274 | } | |
ccb1352e | 1275 | |
b637e498 | 1276 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1277 | ovs_unlock(); |
ccb1352e | 1278 | |
aed06778 | 1279 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1280 | &flow->id, info, false, ufid_flags); |
aed06778 JR |
1281 | if (likely(reply)) { |
1282 | if (likely(!IS_ERR(reply))) { | |
1283 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1284 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1285 | reply, info->snd_portid, | |
1286 | info->snd_seq, 0, | |
74ed7ab9 JS |
1287 | OVS_FLOW_CMD_DEL, |
1288 | ufid_flags); | |
aed06778 JR |
1289 | rcu_read_unlock(); |
1290 | BUG_ON(err < 0); | |
1291 | ||
1292 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1293 | } else { | |
1294 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1295 | } | |
fb5d1e9e | 1296 | } |
ccb1352e | 1297 | |
aed06778 | 1298 | ovs_flow_free(flow, true); |
ccb1352e | 1299 | return 0; |
8e4e1713 PS |
1300 | unlock: |
1301 | ovs_unlock(); | |
1302 | return err; | |
ccb1352e JG |
1303 | } |
1304 | ||
1305 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1306 | { | |
74ed7ab9 | 1307 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1308 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1309 | struct table_instance *ti; |
ccb1352e | 1310 | struct datapath *dp; |
74ed7ab9 JS |
1311 | u32 ufid_flags; |
1312 | int err; | |
1313 | ||
1314 | err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a, | |
1315 | OVS_FLOW_ATTR_MAX, flow_policy); | |
1316 | if (err) | |
1317 | return err; | |
1318 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1319 | |
d57170b1 | 1320 | rcu_read_lock(); |
cc3a5ae6 | 1321 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1322 | if (!dp) { |
d57170b1 | 1323 | rcu_read_unlock(); |
ccb1352e | 1324 | return -ENODEV; |
8e4e1713 | 1325 | } |
ccb1352e | 1326 | |
b637e498 | 1327 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1328 | for (;;) { |
1329 | struct sw_flow *flow; | |
1330 | u32 bucket, obj; | |
1331 | ||
1332 | bucket = cb->args[0]; | |
1333 | obj = cb->args[1]; | |
b637e498 | 1334 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1335 | if (!flow) |
1336 | break; | |
1337 | ||
0e9796b4 | 1338 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1339 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1340 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
74ed7ab9 | 1341 | OVS_FLOW_CMD_NEW, ufid_flags) < 0) |
ccb1352e JG |
1342 | break; |
1343 | ||
1344 | cb->args[0] = bucket; | |
1345 | cb->args[1] = obj; | |
1346 | } | |
d57170b1 | 1347 | rcu_read_unlock(); |
ccb1352e JG |
1348 | return skb->len; |
1349 | } | |
1350 | ||
0c200ef9 PS |
1351 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1352 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1353 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1354 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1355 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1356 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1357 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1358 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1359 | }; |
1360 | ||
48e48a70 | 1361 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e JG |
1362 | { .cmd = OVS_FLOW_CMD_NEW, |
1363 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1364 | .policy = flow_policy, | |
37bdc87b | 1365 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1366 | }, |
1367 | { .cmd = OVS_FLOW_CMD_DEL, | |
1368 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1369 | .policy = flow_policy, | |
1370 | .doit = ovs_flow_cmd_del | |
1371 | }, | |
1372 | { .cmd = OVS_FLOW_CMD_GET, | |
1373 | .flags = 0, /* OK for unprivileged users. */ | |
1374 | .policy = flow_policy, | |
1375 | .doit = ovs_flow_cmd_get, | |
1376 | .dumpit = ovs_flow_cmd_dump | |
1377 | }, | |
1378 | { .cmd = OVS_FLOW_CMD_SET, | |
1379 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1380 | .policy = flow_policy, | |
37bdc87b | 1381 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1382 | }, |
1383 | }; | |
1384 | ||
0c200ef9 | 1385 | static struct genl_family dp_flow_genl_family = { |
ccb1352e JG |
1386 | .id = GENL_ID_GENERATE, |
1387 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1388 | .name = OVS_FLOW_FAMILY, |
1389 | .version = OVS_FLOW_VERSION, | |
1390 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3a4e0d6a PS |
1391 | .netnsok = true, |
1392 | .parallel_ops = true, | |
0c200ef9 PS |
1393 | .ops = dp_flow_genl_ops, |
1394 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1395 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1396 | .n_mcgrps = 1, | |
ccb1352e JG |
1397 | }; |
1398 | ||
c3ff8cfe TG |
1399 | static size_t ovs_dp_cmd_msg_size(void) |
1400 | { | |
1401 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1402 | ||
1403 | msgsize += nla_total_size(IFNAMSIZ); | |
1404 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1bd7116f | 1405 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
45fb9c35 | 1406 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1407 | |
1408 | return msgsize; | |
1409 | } | |
1410 | ||
8ec609d8 | 1411 | /* Called with ovs_mutex. */ |
ccb1352e | 1412 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1413 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1414 | { |
1415 | struct ovs_header *ovs_header; | |
1416 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1417 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1418 | int err; |
1419 | ||
15e47304 | 1420 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1421 | flags, cmd); |
1422 | if (!ovs_header) | |
1423 | goto error; | |
1424 | ||
1425 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1426 | ||
ccb1352e | 1427 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1428 | if (err) |
1429 | goto nla_put_failure; | |
1430 | ||
1bd7116f AZ |
1431 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1432 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1433 | &dp_stats)) | |
1434 | goto nla_put_failure; | |
1435 | ||
1436 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1437 | sizeof(struct ovs_dp_megaflow_stats), | |
1438 | &dp_megaflow_stats)) | |
028d6a67 | 1439 | goto nla_put_failure; |
ccb1352e | 1440 | |
43d4be9c TG |
1441 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1442 | goto nla_put_failure; | |
1443 | ||
053c095a JB |
1444 | genlmsg_end(skb, ovs_header); |
1445 | return 0; | |
ccb1352e JG |
1446 | |
1447 | nla_put_failure: | |
1448 | genlmsg_cancel(skb, ovs_header); | |
1449 | error: | |
1450 | return -EMSGSIZE; | |
1451 | } | |
1452 | ||
6093ae9a | 1453 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
ccb1352e | 1454 | { |
6093ae9a | 1455 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
ccb1352e JG |
1456 | } |
1457 | ||
bb6f9a70 | 1458 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1459 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1460 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1461 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1462 | { | |
1463 | struct datapath *dp; | |
1464 | ||
1465 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1466 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1467 | else { |
1468 | struct vport *vport; | |
1469 | ||
46df7b81 | 1470 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1471 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1472 | } |
1473 | return dp ? dp : ERR_PTR(-ENODEV); | |
1474 | } | |
1475 | ||
44da5ae5 TG |
1476 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1477 | { | |
1478 | struct datapath *dp; | |
1479 | ||
1480 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1481 | if (IS_ERR(dp)) |
44da5ae5 TG |
1482 | return; |
1483 | ||
1484 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1485 | dp->user_features = 0; | |
1486 | } | |
1487 | ||
12eb18f7 | 1488 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
43d4be9c TG |
1489 | { |
1490 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1491 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1492 | } | |
1493 | ||
ccb1352e JG |
1494 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1495 | { | |
1496 | struct nlattr **a = info->attrs; | |
1497 | struct vport_parms parms; | |
1498 | struct sk_buff *reply; | |
1499 | struct datapath *dp; | |
1500 | struct vport *vport; | |
46df7b81 | 1501 | struct ovs_net *ovs_net; |
15eac2a7 | 1502 | int err, i; |
ccb1352e JG |
1503 | |
1504 | err = -EINVAL; | |
1505 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1506 | goto err; | |
1507 | ||
6093ae9a JR |
1508 | reply = ovs_dp_cmd_alloc_info(info); |
1509 | if (!reply) | |
1510 | return -ENOMEM; | |
ccb1352e JG |
1511 | |
1512 | err = -ENOMEM; | |
1513 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1514 | if (dp == NULL) | |
6093ae9a | 1515 | goto err_free_reply; |
46df7b81 | 1516 | |
efd7ef1c | 1517 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1518 | |
1519 | /* Allocate table. */ | |
b637e498 PS |
1520 | err = ovs_flow_tbl_init(&dp->table); |
1521 | if (err) | |
ccb1352e JG |
1522 | goto err_free_dp; |
1523 | ||
1c213bd2 | 1524 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1525 | if (!dp->stats_percpu) { |
1526 | err = -ENOMEM; | |
1527 | goto err_destroy_table; | |
1528 | } | |
1529 | ||
15eac2a7 | 1530 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
e6445719 | 1531 | GFP_KERNEL); |
15eac2a7 PS |
1532 | if (!dp->ports) { |
1533 | err = -ENOMEM; | |
1534 | goto err_destroy_percpu; | |
1535 | } | |
1536 | ||
1537 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1538 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1539 | ||
ccb1352e JG |
1540 | /* Set up our datapath device. */ |
1541 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1542 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1543 | parms.options = NULL; | |
1544 | parms.dp = dp; | |
1545 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1546 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1547 | |
43d4be9c TG |
1548 | ovs_dp_change(dp, a); |
1549 | ||
6093ae9a JR |
1550 | /* So far only local changes have been made, now need the lock. */ |
1551 | ovs_lock(); | |
1552 | ||
ccb1352e JG |
1553 | vport = new_vport(&parms); |
1554 | if (IS_ERR(vport)) { | |
1555 | err = PTR_ERR(vport); | |
1556 | if (err == -EBUSY) | |
1557 | err = -EEXIST; | |
1558 | ||
44da5ae5 TG |
1559 | if (err == -EEXIST) { |
1560 | /* An outdated user space instance that does not understand | |
1561 | * the concept of user_features has attempted to create a new | |
1562 | * datapath and is likely to reuse it. Drop all user features. | |
1563 | */ | |
1564 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1565 | ovs_dp_reset_user_features(skb, info); | |
1566 | } | |
1567 | ||
15eac2a7 | 1568 | goto err_destroy_ports_array; |
ccb1352e JG |
1569 | } |
1570 | ||
6093ae9a JR |
1571 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1572 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1573 | BUG_ON(err < 0); | |
ccb1352e | 1574 | |
46df7b81 | 1575 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1576 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1577 | |
1578 | ovs_unlock(); | |
ccb1352e | 1579 | |
2a94fe48 | 1580 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1581 | return 0; |
1582 | ||
15eac2a7 | 1583 | err_destroy_ports_array: |
6093ae9a | 1584 | ovs_unlock(); |
15eac2a7 | 1585 | kfree(dp->ports); |
ccb1352e JG |
1586 | err_destroy_percpu: |
1587 | free_percpu(dp->stats_percpu); | |
1588 | err_destroy_table: | |
9b996e54 | 1589 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e JG |
1590 | err_free_dp: |
1591 | kfree(dp); | |
6093ae9a JR |
1592 | err_free_reply: |
1593 | kfree_skb(reply); | |
ccb1352e JG |
1594 | err: |
1595 | return err; | |
1596 | } | |
1597 | ||
8e4e1713 | 1598 | /* Called with ovs_mutex. */ |
46df7b81 | 1599 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1600 | { |
15eac2a7 | 1601 | int i; |
ccb1352e | 1602 | |
15eac2a7 PS |
1603 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1604 | struct vport *vport; | |
b67bfe0d | 1605 | struct hlist_node *n; |
15eac2a7 | 1606 | |
b67bfe0d | 1607 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1608 | if (vport->port_no != OVSP_LOCAL) |
1609 | ovs_dp_detach_port(vport); | |
1610 | } | |
ccb1352e | 1611 | |
59a35d60 | 1612 | list_del_rcu(&dp->list_node); |
ccb1352e | 1613 | |
8e4e1713 | 1614 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1615 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1616 | */ |
8e4e1713 | 1617 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1618 | |
e80857cc | 1619 | /* RCU destroy the flow table */ |
ccb1352e | 1620 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1621 | } |
1622 | ||
1623 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1624 | { | |
1625 | struct sk_buff *reply; | |
1626 | struct datapath *dp; | |
1627 | int err; | |
1628 | ||
6093ae9a JR |
1629 | reply = ovs_dp_cmd_alloc_info(info); |
1630 | if (!reply) | |
1631 | return -ENOMEM; | |
1632 | ||
8e4e1713 | 1633 | ovs_lock(); |
46df7b81 PS |
1634 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1635 | err = PTR_ERR(dp); | |
1636 | if (IS_ERR(dp)) | |
6093ae9a | 1637 | goto err_unlock_free; |
46df7b81 | 1638 | |
6093ae9a JR |
1639 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1640 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1641 | BUG_ON(err < 0); | |
46df7b81 PS |
1642 | |
1643 | __dp_destroy(dp); | |
8e4e1713 | 1644 | ovs_unlock(); |
ccb1352e | 1645 | |
2a94fe48 | 1646 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1647 | |
1648 | return 0; | |
6093ae9a JR |
1649 | |
1650 | err_unlock_free: | |
8e4e1713 | 1651 | ovs_unlock(); |
6093ae9a | 1652 | kfree_skb(reply); |
8e4e1713 | 1653 | return err; |
ccb1352e JG |
1654 | } |
1655 | ||
1656 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1657 | { | |
1658 | struct sk_buff *reply; | |
1659 | struct datapath *dp; | |
1660 | int err; | |
1661 | ||
6093ae9a JR |
1662 | reply = ovs_dp_cmd_alloc_info(info); |
1663 | if (!reply) | |
1664 | return -ENOMEM; | |
1665 | ||
8e4e1713 | 1666 | ovs_lock(); |
46df7b81 | 1667 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1668 | err = PTR_ERR(dp); |
ccb1352e | 1669 | if (IS_ERR(dp)) |
6093ae9a | 1670 | goto err_unlock_free; |
ccb1352e | 1671 | |
43d4be9c TG |
1672 | ovs_dp_change(dp, info->attrs); |
1673 | ||
6093ae9a JR |
1674 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1675 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1676 | BUG_ON(err < 0); | |
ccb1352e | 1677 | |
8e4e1713 | 1678 | ovs_unlock(); |
2a94fe48 | 1679 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1680 | |
1681 | return 0; | |
6093ae9a JR |
1682 | |
1683 | err_unlock_free: | |
8e4e1713 | 1684 | ovs_unlock(); |
6093ae9a | 1685 | kfree_skb(reply); |
8e4e1713 | 1686 | return err; |
ccb1352e JG |
1687 | } |
1688 | ||
1689 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1690 | { | |
1691 | struct sk_buff *reply; | |
1692 | struct datapath *dp; | |
8e4e1713 | 1693 | int err; |
ccb1352e | 1694 | |
6093ae9a JR |
1695 | reply = ovs_dp_cmd_alloc_info(info); |
1696 | if (!reply) | |
1697 | return -ENOMEM; | |
1698 | ||
8ec609d8 | 1699 | ovs_lock(); |
46df7b81 | 1700 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1701 | if (IS_ERR(dp)) { |
1702 | err = PTR_ERR(dp); | |
6093ae9a | 1703 | goto err_unlock_free; |
8e4e1713 | 1704 | } |
6093ae9a JR |
1705 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1706 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1707 | BUG_ON(err < 0); | |
8ec609d8 | 1708 | ovs_unlock(); |
ccb1352e JG |
1709 | |
1710 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1711 | |
6093ae9a | 1712 | err_unlock_free: |
8ec609d8 | 1713 | ovs_unlock(); |
6093ae9a | 1714 | kfree_skb(reply); |
8e4e1713 | 1715 | return err; |
ccb1352e JG |
1716 | } |
1717 | ||
1718 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1719 | { | |
46df7b81 | 1720 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1721 | struct datapath *dp; |
1722 | int skip = cb->args[0]; | |
1723 | int i = 0; | |
1724 | ||
8ec609d8 PS |
1725 | ovs_lock(); |
1726 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1727 | if (i >= skip && |
15e47304 | 1728 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1729 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1730 | OVS_DP_CMD_NEW) < 0) | |
1731 | break; | |
1732 | i++; | |
1733 | } | |
8ec609d8 | 1734 | ovs_unlock(); |
ccb1352e JG |
1735 | |
1736 | cb->args[0] = i; | |
1737 | ||
1738 | return skb->len; | |
1739 | } | |
1740 | ||
0c200ef9 PS |
1741 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1742 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1743 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1744 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1745 | }; | |
1746 | ||
48e48a70 | 1747 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e JG |
1748 | { .cmd = OVS_DP_CMD_NEW, |
1749 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1750 | .policy = datapath_policy, | |
1751 | .doit = ovs_dp_cmd_new | |
1752 | }, | |
1753 | { .cmd = OVS_DP_CMD_DEL, | |
1754 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1755 | .policy = datapath_policy, | |
1756 | .doit = ovs_dp_cmd_del | |
1757 | }, | |
1758 | { .cmd = OVS_DP_CMD_GET, | |
1759 | .flags = 0, /* OK for unprivileged users. */ | |
1760 | .policy = datapath_policy, | |
1761 | .doit = ovs_dp_cmd_get, | |
1762 | .dumpit = ovs_dp_cmd_dump | |
1763 | }, | |
1764 | { .cmd = OVS_DP_CMD_SET, | |
1765 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1766 | .policy = datapath_policy, | |
1767 | .doit = ovs_dp_cmd_set, | |
1768 | }, | |
1769 | }; | |
1770 | ||
0c200ef9 | 1771 | static struct genl_family dp_datapath_genl_family = { |
ccb1352e JG |
1772 | .id = GENL_ID_GENERATE, |
1773 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1774 | .name = OVS_DATAPATH_FAMILY, |
1775 | .version = OVS_DATAPATH_VERSION, | |
1776 | .maxattr = OVS_DP_ATTR_MAX, | |
3a4e0d6a PS |
1777 | .netnsok = true, |
1778 | .parallel_ops = true, | |
0c200ef9 PS |
1779 | .ops = dp_datapath_genl_ops, |
1780 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1781 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1782 | .n_mcgrps = 1, | |
ccb1352e JG |
1783 | }; |
1784 | ||
8e4e1713 | 1785 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1786 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1787 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1788 | { |
1789 | struct ovs_header *ovs_header; | |
1790 | struct ovs_vport_stats vport_stats; | |
1791 | int err; | |
1792 | ||
15e47304 | 1793 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1794 | flags, cmd); |
1795 | if (!ovs_header) | |
1796 | return -EMSGSIZE; | |
1797 | ||
1798 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1799 | ||
028d6a67 DM |
1800 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1801 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 AW |
1802 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
1803 | vport->ops->get_name(vport))) | |
028d6a67 | 1804 | goto nla_put_failure; |
ccb1352e JG |
1805 | |
1806 | ovs_vport_get_stats(vport, &vport_stats); | |
028d6a67 DM |
1807 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1808 | &vport_stats)) | |
1809 | goto nla_put_failure; | |
ccb1352e | 1810 | |
5cd667b0 AW |
1811 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1812 | goto nla_put_failure; | |
1813 | ||
ccb1352e JG |
1814 | err = ovs_vport_get_options(vport, skb); |
1815 | if (err == -EMSGSIZE) | |
1816 | goto error; | |
1817 | ||
053c095a JB |
1818 | genlmsg_end(skb, ovs_header); |
1819 | return 0; | |
ccb1352e JG |
1820 | |
1821 | nla_put_failure: | |
1822 | err = -EMSGSIZE; | |
1823 | error: | |
1824 | genlmsg_cancel(skb, ovs_header); | |
1825 | return err; | |
1826 | } | |
1827 | ||
6093ae9a JR |
1828 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1829 | { | |
1830 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1831 | } | |
1832 | ||
1833 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
15e47304 | 1834 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1835 | u32 seq, u8 cmd) |
1836 | { | |
1837 | struct sk_buff *skb; | |
1838 | int retval; | |
1839 | ||
1840 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1841 | if (!skb) | |
1842 | return ERR_PTR(-ENOMEM); | |
1843 | ||
15e47304 | 1844 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1845 | BUG_ON(retval < 0); |
1846 | ||
ccb1352e JG |
1847 | return skb; |
1848 | } | |
1849 | ||
8e4e1713 | 1850 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 1851 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 1852 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1853 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1854 | { | |
1855 | struct datapath *dp; | |
1856 | struct vport *vport; | |
1857 | ||
1858 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1859 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1860 | if (!vport) |
1861 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1862 | if (ovs_header->dp_ifindex && |
1863 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1864 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1865 | return vport; |
1866 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1867 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1868 | ||
1869 | if (port_no >= DP_MAX_PORTS) | |
1870 | return ERR_PTR(-EFBIG); | |
1871 | ||
46df7b81 | 1872 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1873 | if (!dp) |
1874 | return ERR_PTR(-ENODEV); | |
1875 | ||
8e4e1713 | 1876 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1877 | if (!vport) |
14408dba | 1878 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1879 | return vport; |
1880 | } else | |
1881 | return ERR_PTR(-EINVAL); | |
1882 | } | |
1883 | ||
1884 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
1885 | { | |
1886 | struct nlattr **a = info->attrs; | |
1887 | struct ovs_header *ovs_header = info->userhdr; | |
1888 | struct vport_parms parms; | |
1889 | struct sk_buff *reply; | |
1890 | struct vport *vport; | |
1891 | struct datapath *dp; | |
1892 | u32 port_no; | |
1893 | int err; | |
1894 | ||
ccb1352e JG |
1895 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1896 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a JR |
1897 | return -EINVAL; |
1898 | ||
1899 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1900 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1901 | if (port_no >= DP_MAX_PORTS) | |
1902 | return -EFBIG; | |
1903 | ||
1904 | reply = ovs_vport_cmd_alloc_info(); | |
1905 | if (!reply) | |
1906 | return -ENOMEM; | |
ccb1352e | 1907 | |
8e4e1713 | 1908 | ovs_lock(); |
62b9c8d0 | 1909 | restart: |
46df7b81 | 1910 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1911 | err = -ENODEV; |
1912 | if (!dp) | |
6093ae9a | 1913 | goto exit_unlock_free; |
ccb1352e | 1914 | |
6093ae9a | 1915 | if (port_no) { |
8e4e1713 | 1916 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1917 | err = -EBUSY; |
1918 | if (vport) | |
6093ae9a | 1919 | goto exit_unlock_free; |
ccb1352e JG |
1920 | } else { |
1921 | for (port_no = 1; ; port_no++) { | |
1922 | if (port_no >= DP_MAX_PORTS) { | |
1923 | err = -EFBIG; | |
6093ae9a | 1924 | goto exit_unlock_free; |
ccb1352e | 1925 | } |
8e4e1713 | 1926 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1927 | if (!vport) |
1928 | break; | |
1929 | } | |
1930 | } | |
1931 | ||
1932 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
1933 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1934 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
1935 | parms.dp = dp; | |
1936 | parms.port_no = port_no; | |
5cd667b0 | 1937 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
1938 | |
1939 | vport = new_vport(&parms); | |
1940 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
1941 | if (IS_ERR(vport)) { |
1942 | if (err == -EAGAIN) | |
1943 | goto restart; | |
6093ae9a | 1944 | goto exit_unlock_free; |
62b9c8d0 | 1945 | } |
ccb1352e | 1946 | |
6093ae9a JR |
1947 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1948 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1949 | BUG_ON(err < 0); | |
1950 | ovs_unlock(); | |
ed661185 | 1951 | |
2a94fe48 | 1952 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1953 | return 0; |
ccb1352e | 1954 | |
6093ae9a | 1955 | exit_unlock_free: |
8e4e1713 | 1956 | ovs_unlock(); |
6093ae9a | 1957 | kfree_skb(reply); |
ccb1352e JG |
1958 | return err; |
1959 | } | |
1960 | ||
1961 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1962 | { | |
1963 | struct nlattr **a = info->attrs; | |
1964 | struct sk_buff *reply; | |
1965 | struct vport *vport; | |
1966 | int err; | |
1967 | ||
6093ae9a JR |
1968 | reply = ovs_vport_cmd_alloc_info(); |
1969 | if (!reply) | |
1970 | return -ENOMEM; | |
1971 | ||
8e4e1713 | 1972 | ovs_lock(); |
46df7b81 | 1973 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1974 | err = PTR_ERR(vport); |
1975 | if (IS_ERR(vport)) | |
6093ae9a | 1976 | goto exit_unlock_free; |
ccb1352e | 1977 | |
ccb1352e | 1978 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 1979 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 1980 | err = -EINVAL; |
6093ae9a | 1981 | goto exit_unlock_free; |
a9341512 JG |
1982 | } |
1983 | ||
f44f3408 | 1984 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 1985 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 1986 | if (err) |
6093ae9a | 1987 | goto exit_unlock_free; |
f44f3408 | 1988 | } |
a9341512 | 1989 | |
5cd667b0 AW |
1990 | |
1991 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
1992 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
1993 | ||
1994 | err = ovs_vport_set_upcall_portids(vport, ids); | |
1995 | if (err) | |
1996 | goto exit_unlock_free; | |
1997 | } | |
ccb1352e | 1998 | |
a9341512 JG |
1999 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2000 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2001 | BUG_ON(err < 0); | |
ccb1352e | 2002 | |
8e4e1713 | 2003 | ovs_unlock(); |
2a94fe48 | 2004 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2005 | return 0; |
ccb1352e | 2006 | |
6093ae9a | 2007 | exit_unlock_free: |
8e4e1713 | 2008 | ovs_unlock(); |
6093ae9a | 2009 | kfree_skb(reply); |
ccb1352e JG |
2010 | return err; |
2011 | } | |
2012 | ||
2013 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2014 | { | |
2015 | struct nlattr **a = info->attrs; | |
2016 | struct sk_buff *reply; | |
2017 | struct vport *vport; | |
2018 | int err; | |
2019 | ||
6093ae9a JR |
2020 | reply = ovs_vport_cmd_alloc_info(); |
2021 | if (!reply) | |
2022 | return -ENOMEM; | |
2023 | ||
8e4e1713 | 2024 | ovs_lock(); |
46df7b81 | 2025 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2026 | err = PTR_ERR(vport); |
2027 | if (IS_ERR(vport)) | |
6093ae9a | 2028 | goto exit_unlock_free; |
ccb1352e JG |
2029 | |
2030 | if (vport->port_no == OVSP_LOCAL) { | |
2031 | err = -EINVAL; | |
6093ae9a | 2032 | goto exit_unlock_free; |
ccb1352e JG |
2033 | } |
2034 | ||
6093ae9a JR |
2035 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2036 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
2037 | BUG_ON(err < 0); | |
ccb1352e | 2038 | ovs_dp_detach_port(vport); |
6093ae9a | 2039 | ovs_unlock(); |
ccb1352e | 2040 | |
2a94fe48 | 2041 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2042 | return 0; |
ccb1352e | 2043 | |
6093ae9a | 2044 | exit_unlock_free: |
8e4e1713 | 2045 | ovs_unlock(); |
6093ae9a | 2046 | kfree_skb(reply); |
ccb1352e JG |
2047 | return err; |
2048 | } | |
2049 | ||
2050 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2051 | { | |
2052 | struct nlattr **a = info->attrs; | |
2053 | struct ovs_header *ovs_header = info->userhdr; | |
2054 | struct sk_buff *reply; | |
2055 | struct vport *vport; | |
2056 | int err; | |
2057 | ||
6093ae9a JR |
2058 | reply = ovs_vport_cmd_alloc_info(); |
2059 | if (!reply) | |
2060 | return -ENOMEM; | |
2061 | ||
ccb1352e | 2062 | rcu_read_lock(); |
46df7b81 | 2063 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2064 | err = PTR_ERR(vport); |
2065 | if (IS_ERR(vport)) | |
6093ae9a JR |
2066 | goto exit_unlock_free; |
2067 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
2068 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2069 | BUG_ON(err < 0); | |
ccb1352e JG |
2070 | rcu_read_unlock(); |
2071 | ||
2072 | return genlmsg_reply(reply, info); | |
2073 | ||
6093ae9a | 2074 | exit_unlock_free: |
ccb1352e | 2075 | rcu_read_unlock(); |
6093ae9a | 2076 | kfree_skb(reply); |
ccb1352e JG |
2077 | return err; |
2078 | } | |
2079 | ||
2080 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2081 | { | |
2082 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2083 | struct datapath *dp; | |
15eac2a7 PS |
2084 | int bucket = cb->args[0], skip = cb->args[1]; |
2085 | int i, j = 0; | |
ccb1352e | 2086 | |
42ee19e2 | 2087 | rcu_read_lock(); |
cc3a5ae6 | 2088 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2089 | if (!dp) { |
2090 | rcu_read_unlock(); | |
ccb1352e | 2091 | return -ENODEV; |
42ee19e2 | 2092 | } |
15eac2a7 | 2093 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2094 | struct vport *vport; |
15eac2a7 PS |
2095 | |
2096 | j = 0; | |
b67bfe0d | 2097 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2098 | if (j >= skip && |
2099 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 2100 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2101 | cb->nlh->nlmsg_seq, |
2102 | NLM_F_MULTI, | |
2103 | OVS_VPORT_CMD_NEW) < 0) | |
2104 | goto out; | |
2105 | ||
2106 | j++; | |
2107 | } | |
2108 | skip = 0; | |
ccb1352e | 2109 | } |
15eac2a7 | 2110 | out: |
ccb1352e JG |
2111 | rcu_read_unlock(); |
2112 | ||
15eac2a7 PS |
2113 | cb->args[0] = i; |
2114 | cb->args[1] = j; | |
ccb1352e | 2115 | |
15eac2a7 | 2116 | return skb->len; |
ccb1352e JG |
2117 | } |
2118 | ||
0c200ef9 PS |
2119 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2120 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2121 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2122 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2123 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2124 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2125 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2126 | }; | |
2127 | ||
48e48a70 | 2128 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e JG |
2129 | { .cmd = OVS_VPORT_CMD_NEW, |
2130 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2131 | .policy = vport_policy, | |
2132 | .doit = ovs_vport_cmd_new | |
2133 | }, | |
2134 | { .cmd = OVS_VPORT_CMD_DEL, | |
2135 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2136 | .policy = vport_policy, | |
2137 | .doit = ovs_vport_cmd_del | |
2138 | }, | |
2139 | { .cmd = OVS_VPORT_CMD_GET, | |
2140 | .flags = 0, /* OK for unprivileged users. */ | |
2141 | .policy = vport_policy, | |
2142 | .doit = ovs_vport_cmd_get, | |
2143 | .dumpit = ovs_vport_cmd_dump | |
2144 | }, | |
2145 | { .cmd = OVS_VPORT_CMD_SET, | |
2146 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2147 | .policy = vport_policy, | |
2148 | .doit = ovs_vport_cmd_set, | |
2149 | }, | |
2150 | }; | |
2151 | ||
0c200ef9 PS |
2152 | struct genl_family dp_vport_genl_family = { |
2153 | .id = GENL_ID_GENERATE, | |
2154 | .hdrsize = sizeof(struct ovs_header), | |
2155 | .name = OVS_VPORT_FAMILY, | |
2156 | .version = OVS_VPORT_VERSION, | |
2157 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2158 | .netnsok = true, | |
2159 | .parallel_ops = true, | |
2160 | .ops = dp_vport_genl_ops, | |
2161 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2162 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2163 | .n_mcgrps = 1, | |
ccb1352e JG |
2164 | }; |
2165 | ||
0c200ef9 PS |
2166 | static struct genl_family * const dp_genl_families[] = { |
2167 | &dp_datapath_genl_family, | |
2168 | &dp_vport_genl_family, | |
2169 | &dp_flow_genl_family, | |
2170 | &dp_packet_genl_family, | |
ccb1352e JG |
2171 | }; |
2172 | ||
2173 | static void dp_unregister_genl(int n_families) | |
2174 | { | |
2175 | int i; | |
2176 | ||
2177 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2178 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2179 | } |
2180 | ||
2181 | static int dp_register_genl(void) | |
2182 | { | |
ccb1352e JG |
2183 | int err; |
2184 | int i; | |
2185 | ||
ccb1352e | 2186 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2187 | |
0c200ef9 | 2188 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2189 | if (err) |
2190 | goto error; | |
ccb1352e JG |
2191 | } |
2192 | ||
2193 | return 0; | |
2194 | ||
2195 | error: | |
0c200ef9 | 2196 | dp_unregister_genl(i); |
ccb1352e JG |
2197 | return err; |
2198 | } | |
2199 | ||
46df7b81 PS |
2200 | static int __net_init ovs_init_net(struct net *net) |
2201 | { | |
2202 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2203 | ||
2204 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2205 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
46df7b81 PS |
2206 | return 0; |
2207 | } | |
2208 | ||
7b4577a9 PS |
2209 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2210 | struct list_head *head) | |
46df7b81 | 2211 | { |
8e4e1713 | 2212 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2213 | struct datapath *dp; |
2214 | ||
2215 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2216 | int i; | |
2217 | ||
2218 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2219 | struct vport *vport; | |
2220 | ||
2221 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
2222 | struct netdev_vport *netdev_vport; | |
2223 | ||
2224 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) | |
2225 | continue; | |
2226 | ||
2227 | netdev_vport = netdev_vport_priv(vport); | |
2228 | if (dev_net(netdev_vport->dev) == dnet) | |
2229 | list_add(&vport->detach_list, head); | |
2230 | } | |
2231 | } | |
2232 | } | |
2233 | } | |
2234 | ||
2235 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2236 | { | |
2237 | struct datapath *dp, *dp_next; | |
2238 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2239 | struct vport *vport, *vport_next; | |
2240 | struct net *net; | |
2241 | LIST_HEAD(head); | |
46df7b81 | 2242 | |
8e4e1713 | 2243 | ovs_lock(); |
46df7b81 PS |
2244 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2245 | __dp_destroy(dp); | |
7b4577a9 PS |
2246 | |
2247 | rtnl_lock(); | |
2248 | for_each_net(net) | |
2249 | list_vports_from_net(net, dnet, &head); | |
2250 | rtnl_unlock(); | |
2251 | ||
2252 | /* Detach all vports from given namespace. */ | |
2253 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2254 | list_del(&vport->detach_list); | |
2255 | ovs_dp_detach_port(vport); | |
2256 | } | |
2257 | ||
8e4e1713 PS |
2258 | ovs_unlock(); |
2259 | ||
2260 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2261 | } |
2262 | ||
2263 | static struct pernet_operations ovs_net_ops = { | |
2264 | .init = ovs_init_net, | |
2265 | .exit = ovs_exit_net, | |
2266 | .id = &ovs_net_id, | |
2267 | .size = sizeof(struct ovs_net), | |
2268 | }; | |
2269 | ||
ccb1352e JG |
2270 | static int __init dp_init(void) |
2271 | { | |
ccb1352e JG |
2272 | int err; |
2273 | ||
3523b29b | 2274 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2275 | |
2276 | pr_info("Open vSwitch switching datapath\n"); | |
2277 | ||
971427f3 | 2278 | err = action_fifos_init(); |
ccb1352e JG |
2279 | if (err) |
2280 | goto error; | |
2281 | ||
971427f3 AZ |
2282 | err = ovs_internal_dev_rtnl_link_register(); |
2283 | if (err) | |
2284 | goto error_action_fifos_exit; | |
2285 | ||
5b9e7e16 JP |
2286 | err = ovs_flow_init(); |
2287 | if (err) | |
2288 | goto error_unreg_rtnl_link; | |
2289 | ||
ccb1352e JG |
2290 | err = ovs_vport_init(); |
2291 | if (err) | |
2292 | goto error_flow_exit; | |
2293 | ||
46df7b81 | 2294 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2295 | if (err) |
2296 | goto error_vport_exit; | |
2297 | ||
46df7b81 PS |
2298 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2299 | if (err) | |
2300 | goto error_netns_exit; | |
2301 | ||
62b9c8d0 TG |
2302 | err = ovs_netdev_init(); |
2303 | if (err) | |
2304 | goto error_unreg_notifier; | |
2305 | ||
ccb1352e JG |
2306 | err = dp_register_genl(); |
2307 | if (err < 0) | |
62b9c8d0 | 2308 | goto error_unreg_netdev; |
ccb1352e | 2309 | |
ccb1352e JG |
2310 | return 0; |
2311 | ||
62b9c8d0 TG |
2312 | error_unreg_netdev: |
2313 | ovs_netdev_exit(); | |
ccb1352e JG |
2314 | error_unreg_notifier: |
2315 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2316 | error_netns_exit: |
2317 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2318 | error_vport_exit: |
2319 | ovs_vport_exit(); | |
2320 | error_flow_exit: | |
2321 | ovs_flow_exit(); | |
5b9e7e16 JP |
2322 | error_unreg_rtnl_link: |
2323 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2324 | error_action_fifos_exit: |
2325 | action_fifos_exit(); | |
ccb1352e JG |
2326 | error: |
2327 | return err; | |
2328 | } | |
2329 | ||
2330 | static void dp_cleanup(void) | |
2331 | { | |
ccb1352e | 2332 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2333 | ovs_netdev_exit(); |
ccb1352e | 2334 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2335 | unregister_pernet_device(&ovs_net_ops); |
2336 | rcu_barrier(); | |
ccb1352e JG |
2337 | ovs_vport_exit(); |
2338 | ovs_flow_exit(); | |
5b9e7e16 | 2339 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2340 | action_fifos_exit(); |
ccb1352e JG |
2341 | } |
2342 | ||
2343 | module_init(dp_init); | |
2344 | module_exit(dp_cleanup); | |
2345 | ||
2346 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2347 | MODULE_LICENSE("GPL"); |