Commit | Line | Data |
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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 | { |
92c14d9b | 94 | genl_notify(family, skb, info, 0, GFP_KERNEL); |
ed661185 TG |
95 | } |
96 | ||
ccb1352e JG |
97 | /** |
98 | * DOC: Locking: | |
99 | * | |
8e4e1713 PS |
100 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
101 | * operations on vports, etc.), Writes to other state (flow table | |
102 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
103 | * by ovs_lock. | |
ccb1352e JG |
104 | * |
105 | * Reads are protected by RCU. | |
106 | * | |
107 | * There are a few special cases (mostly stats) that have their own | |
108 | * synchronization but they nest under all of above and don't interact with | |
109 | * each other. | |
8e4e1713 PS |
110 | * |
111 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
112 | */ |
113 | ||
8e4e1713 PS |
114 | static DEFINE_MUTEX(ovs_mutex); |
115 | ||
116 | void ovs_lock(void) | |
117 | { | |
118 | mutex_lock(&ovs_mutex); | |
119 | } | |
120 | ||
121 | void ovs_unlock(void) | |
122 | { | |
123 | mutex_unlock(&ovs_mutex); | |
124 | } | |
125 | ||
126 | #ifdef CONFIG_LOCKDEP | |
127 | int lockdep_ovsl_is_held(void) | |
128 | { | |
129 | if (debug_locks) | |
130 | return lockdep_is_held(&ovs_mutex); | |
131 | else | |
132 | return 1; | |
133 | } | |
9ba559d9 | 134 | EXPORT_SYMBOL_GPL(lockdep_ovsl_is_held); |
8e4e1713 PS |
135 | #endif |
136 | ||
ccb1352e | 137 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 138 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 139 | const struct sw_flow_key *, |
ccb1352e | 140 | const struct dp_upcall_info *); |
8055a89c | 141 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 142 | const struct sw_flow_key *, |
ccb1352e JG |
143 | const struct dp_upcall_info *); |
144 | ||
cc3a5ae6 AZ |
145 | /* Must be called with rcu_read_lock. */ |
146 | static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex) | |
ccb1352e | 147 | { |
cc3a5ae6 | 148 | struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex); |
ccb1352e | 149 | |
ccb1352e JG |
150 | if (dev) { |
151 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
152 | if (vport) | |
cc3a5ae6 | 153 | return vport->dp; |
ccb1352e | 154 | } |
cc3a5ae6 AZ |
155 | |
156 | return NULL; | |
157 | } | |
158 | ||
159 | /* The caller must hold either ovs_mutex or rcu_read_lock to keep the | |
160 | * returned dp pointer valid. | |
161 | */ | |
162 | static inline struct datapath *get_dp(struct net *net, int dp_ifindex) | |
163 | { | |
164 | struct datapath *dp; | |
165 | ||
166 | WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); | |
167 | rcu_read_lock(); | |
168 | dp = get_dp_rcu(net, dp_ifindex); | |
ccb1352e JG |
169 | rcu_read_unlock(); |
170 | ||
171 | return dp; | |
172 | } | |
173 | ||
8e4e1713 | 174 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 175 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 176 | { |
8e4e1713 | 177 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
c9db965c | 178 | return ovs_vport_name(vport); |
ccb1352e JG |
179 | } |
180 | ||
12eb18f7 | 181 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
182 | { |
183 | struct vport *local; | |
184 | int ifindex; | |
185 | ||
186 | rcu_read_lock(); | |
187 | ||
15eac2a7 | 188 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 189 | if (local) |
be4ace6e | 190 | ifindex = local->dev->ifindex; |
ccb1352e JG |
191 | else |
192 | ifindex = 0; | |
193 | ||
194 | rcu_read_unlock(); | |
195 | ||
196 | return ifindex; | |
197 | } | |
198 | ||
199 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
200 | { | |
201 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
202 | ||
9b996e54 | 203 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 204 | free_percpu(dp->stats_percpu); |
15eac2a7 | 205 | kfree(dp->ports); |
ccb1352e JG |
206 | kfree(dp); |
207 | } | |
208 | ||
15eac2a7 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 | ||
bb6f9a70 | 215 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
216 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
217 | { | |
218 | struct vport *vport; | |
15eac2a7 PS |
219 | struct hlist_head *head; |
220 | ||
221 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 222 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
223 | if (vport->port_no == port_no) |
224 | return vport; | |
225 | } | |
226 | return NULL; | |
227 | } | |
228 | ||
8e4e1713 | 229 | /* Called with ovs_mutex. */ |
ccb1352e JG |
230 | static struct vport *new_vport(const struct vport_parms *parms) |
231 | { | |
232 | struct vport *vport; | |
233 | ||
234 | vport = ovs_vport_add(parms); | |
235 | if (!IS_ERR(vport)) { | |
236 | struct datapath *dp = parms->dp; | |
15eac2a7 | 237 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 238 | |
15eac2a7 | 239 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 240 | } |
ccb1352e JG |
241 | return vport; |
242 | } | |
243 | ||
ccb1352e JG |
244 | void ovs_dp_detach_port(struct vport *p) |
245 | { | |
8e4e1713 | 246 | ASSERT_OVSL(); |
ccb1352e JG |
247 | |
248 | /* First drop references to device. */ | |
15eac2a7 | 249 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
250 | |
251 | /* Then destroy it. */ | |
252 | ovs_vport_del(p); | |
253 | } | |
254 | ||
255 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 256 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 257 | { |
83c8df26 | 258 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
259 | struct datapath *dp = p->dp; |
260 | struct sw_flow *flow; | |
d98612b8 | 261 | struct sw_flow_actions *sf_acts; |
ccb1352e | 262 | struct dp_stats_percpu *stats; |
ccb1352e | 263 | u64 *stats_counter; |
1bd7116f | 264 | u32 n_mask_hit; |
ccb1352e | 265 | |
404f2f10 | 266 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 267 | |
ccb1352e | 268 | /* Look up flow. */ |
8c8b1b83 | 269 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit); |
ccb1352e JG |
270 | if (unlikely(!flow)) { |
271 | struct dp_upcall_info upcall; | |
8c8b1b83 | 272 | int error; |
ccb1352e | 273 | |
ccea7445 | 274 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 275 | upcall.cmd = OVS_PACKET_CMD_MISS; |
5cd667b0 | 276 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
7f8a436e | 277 | upcall.mru = OVS_CB(skb)->mru; |
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; | |
339 | int err; | |
340 | ||
9207f9d4 | 341 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET); |
09c5e605 | 342 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
343 | if (IS_ERR(segs)) |
344 | return PTR_ERR(segs); | |
330966e5 FW |
345 | if (segs == NULL) |
346 | return -EINVAL; | |
ccb1352e | 347 | |
e8eedb85 PS |
348 | if (gso_type & SKB_GSO_UDP) { |
349 | /* The initial flow key extracted by ovs_flow_key_extract() | |
350 | * in this case is for a first fragment, so we need to | |
351 | * properly mark later fragments. | |
352 | */ | |
353 | later_key = *key; | |
354 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
355 | } | |
356 | ||
ccb1352e JG |
357 | /* Queue all of the segments. */ |
358 | skb = segs; | |
359 | do { | |
e8eedb85 PS |
360 | if (gso_type & SKB_GSO_UDP && skb != segs) |
361 | key = &later_key; | |
362 | ||
363 | err = queue_userspace_packet(dp, skb, key, upcall_info); | |
ccb1352e JG |
364 | if (err) |
365 | break; | |
366 | ||
ccb1352e JG |
367 | } while ((skb = skb->next)); |
368 | ||
369 | /* Free all of the segments. */ | |
370 | skb = segs; | |
371 | do { | |
372 | nskb = skb->next; | |
373 | if (err) | |
374 | kfree_skb(skb); | |
375 | else | |
376 | consume_skb(skb); | |
377 | } while ((skb = nskb)); | |
378 | return err; | |
379 | } | |
380 | ||
8f0aad6f | 381 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
bda56f14 | 382 | unsigned int hdrlen) |
c3ff8cfe TG |
383 | { |
384 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 385 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
41af73e9 | 386 | + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
c3ff8cfe TG |
387 | |
388 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
389 | if (upcall_info->userdata) |
390 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
391 | ||
392 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
393 | if (upcall_info->egress_tun_info) | |
394 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 395 | |
ccea7445 NM |
396 | /* OVS_PACKET_ATTR_ACTIONS */ |
397 | if (upcall_info->actions_len) | |
398 | size += nla_total_size(upcall_info->actions_len); | |
399 | ||
7f8a436e JS |
400 | /* OVS_PACKET_ATTR_MRU */ |
401 | if (upcall_info->mru) | |
402 | size += nla_total_size(sizeof(upcall_info->mru)); | |
403 | ||
c3ff8cfe TG |
404 | return size; |
405 | } | |
406 | ||
7f8a436e JS |
407 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
408 | { | |
409 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
410 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
411 | ||
412 | if (plen > 0) | |
413 | memset(skb_put(skb, plen), 0, plen); | |
414 | } | |
415 | } | |
416 | ||
8055a89c | 417 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 418 | const struct sw_flow_key *key, |
ccb1352e JG |
419 | const struct dp_upcall_info *upcall_info) |
420 | { | |
421 | struct ovs_header *upcall; | |
422 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 423 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 424 | struct nlattr *nla; |
795449d8 | 425 | struct genl_info info = { |
8055a89c | 426 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
795449d8 TG |
427 | .snd_portid = upcall_info->portid, |
428 | }; | |
429 | size_t len; | |
bda56f14 | 430 | unsigned int hlen; |
8055a89c TG |
431 | int err, dp_ifindex; |
432 | ||
433 | dp_ifindex = get_dpifindex(dp); | |
434 | if (!dp_ifindex) | |
435 | return -ENODEV; | |
ccb1352e | 436 | |
df8a39de | 437 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
438 | nskb = skb_clone(skb, GFP_ATOMIC); |
439 | if (!nskb) | |
440 | return -ENOMEM; | |
441 | ||
5968250c | 442 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 443 | if (!nskb) |
ccb1352e JG |
444 | return -ENOMEM; |
445 | ||
ccb1352e JG |
446 | skb = nskb; |
447 | } | |
448 | ||
449 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
450 | err = -EFBIG; | |
451 | goto out; | |
452 | } | |
453 | ||
bda56f14 TG |
454 | /* Complete checksum if needed */ |
455 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
456 | (err = skb_checksum_help(skb))) | |
457 | goto out; | |
458 | ||
459 | /* Older versions of OVS user space enforce alignment of the last | |
460 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
461 | * padding logic. Only perform zerocopy if padding is not required. | |
462 | */ | |
463 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
464 | hlen = skb_zerocopy_headlen(skb); | |
465 | else | |
466 | hlen = skb->len; | |
467 | ||
8f0aad6f | 468 | len = upcall_msg_size(upcall_info, hlen); |
795449d8 | 469 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
ccb1352e JG |
470 | if (!user_skb) { |
471 | err = -ENOMEM; | |
472 | goto out; | |
473 | } | |
474 | ||
475 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
476 | 0, upcall_info->cmd); | |
477 | upcall->dp_ifindex = dp_ifindex; | |
478 | ||
5b4237bb | 479 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
f53e3831 | 480 | BUG_ON(err); |
ccb1352e JG |
481 | |
482 | if (upcall_info->userdata) | |
4490108b BP |
483 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
484 | nla_len(upcall_info->userdata), | |
485 | nla_data(upcall_info->userdata)); | |
ccb1352e | 486 | |
8f0aad6f WZ |
487 | if (upcall_info->egress_tun_info) { |
488 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
fc4099f1 PS |
489 | err = ovs_nla_put_tunnel_info(user_skb, |
490 | upcall_info->egress_tun_info); | |
8f0aad6f WZ |
491 | BUG_ON(err); |
492 | nla_nest_end(user_skb, nla); | |
493 | } | |
494 | ||
ccea7445 NM |
495 | if (upcall_info->actions_len) { |
496 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS); | |
497 | err = ovs_nla_put_actions(upcall_info->actions, | |
498 | upcall_info->actions_len, | |
499 | user_skb); | |
500 | if (!err) | |
501 | nla_nest_end(user_skb, nla); | |
502 | else | |
503 | nla_nest_cancel(user_skb, nla); | |
504 | } | |
505 | ||
7f8a436e JS |
506 | /* Add OVS_PACKET_ATTR_MRU */ |
507 | if (upcall_info->mru) { | |
508 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
509 | upcall_info->mru)) { | |
510 | err = -ENOBUFS; | |
511 | goto out; | |
512 | } | |
513 | pad_packet(dp, user_skb); | |
514 | } | |
515 | ||
bda56f14 TG |
516 | /* Only reserve room for attribute header, packet data is added |
517 | * in skb_zerocopy() */ | |
518 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
519 | err = -ENOBUFS; | |
520 | goto out; | |
521 | } | |
522 | nla->nla_len = nla_attr_size(skb->len); | |
ccb1352e | 523 | |
36d5fe6a ZK |
524 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
525 | if (err) | |
526 | goto out; | |
ccb1352e | 527 | |
aea0bb4f | 528 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 529 | pad_packet(dp, user_skb); |
aea0bb4f | 530 | |
bda56f14 | 531 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 532 | |
bda56f14 | 533 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 534 | user_skb = NULL; |
ccb1352e | 535 | out: |
36d5fe6a ZK |
536 | if (err) |
537 | skb_tx_error(skb); | |
4ee45ea0 | 538 | kfree_skb(user_skb); |
ccb1352e JG |
539 | kfree_skb(nskb); |
540 | return err; | |
541 | } | |
542 | ||
ccb1352e JG |
543 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
544 | { | |
545 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 546 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
547 | struct nlattr **a = info->attrs; |
548 | struct sw_flow_actions *acts; | |
549 | struct sk_buff *packet; | |
550 | struct sw_flow *flow; | |
d98612b8 | 551 | struct sw_flow_actions *sf_acts; |
ccb1352e JG |
552 | struct datapath *dp; |
553 | struct ethhdr *eth; | |
83c8df26 | 554 | struct vport *input_vport; |
7f8a436e | 555 | u16 mru = 0; |
ccb1352e JG |
556 | int len; |
557 | int err; | |
1ba39804 | 558 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
559 | |
560 | err = -EINVAL; | |
561 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 562 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
563 | goto err; |
564 | ||
565 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
566 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
567 | err = -ENOMEM; | |
568 | if (!packet) | |
569 | goto err; | |
570 | skb_reserve(packet, NET_IP_ALIGN); | |
571 | ||
32686a9d | 572 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e JG |
573 | |
574 | skb_reset_mac_header(packet); | |
575 | eth = eth_hdr(packet); | |
576 | ||
577 | /* Normally, setting the skb 'protocol' field would be handled by a | |
578 | * call to eth_type_trans(), but it assumes there's a sending | |
579 | * device, which we may not have. */ | |
6713fc9b | 580 | if (eth_proto_is_802_3(eth->h_proto)) |
ccb1352e JG |
581 | packet->protocol = eth->h_proto; |
582 | else | |
583 | packet->protocol = htons(ETH_P_802_2); | |
584 | ||
7f8a436e JS |
585 | /* Set packet's mru */ |
586 | if (a[OVS_PACKET_ATTR_MRU]) { | |
587 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
588 | packet->ignore_df = 1; | |
589 | } | |
590 | OVS_CB(packet)->mru = mru; | |
591 | ||
ccb1352e | 592 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 593 | flow = ovs_flow_alloc(); |
ccb1352e JG |
594 | err = PTR_ERR(flow); |
595 | if (IS_ERR(flow)) | |
596 | goto err_kfree_skb; | |
597 | ||
c2ac6673 JS |
598 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
599 | packet, &flow->key, log); | |
ccb1352e JG |
600 | if (err) |
601 | goto err_flow_free; | |
602 | ||
7f8a436e | 603 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 604 | &flow->key, &acts, log); |
74f84a57 PS |
605 | if (err) |
606 | goto err_flow_free; | |
ccb1352e | 607 | |
f5796684 | 608 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 609 | packet->priority = flow->key.phy.priority; |
39c7caeb | 610 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
611 | |
612 | rcu_read_lock(); | |
7f8a436e | 613 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
614 | err = -ENODEV; |
615 | if (!dp) | |
616 | goto err_unlock; | |
617 | ||
83c8df26 PS |
618 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
619 | if (!input_vport) | |
620 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
621 | ||
622 | if (!input_vport) | |
623 | goto err_unlock; | |
624 | ||
7f8a436e | 625 | packet->dev = input_vport->dev; |
83c8df26 | 626 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 627 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 628 | |
ccb1352e | 629 | local_bh_disable(); |
d98612b8 | 630 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
631 | local_bh_enable(); |
632 | rcu_read_unlock(); | |
633 | ||
03f0d916 | 634 | ovs_flow_free(flow, false); |
ccb1352e JG |
635 | return err; |
636 | ||
637 | err_unlock: | |
638 | rcu_read_unlock(); | |
639 | err_flow_free: | |
03f0d916 | 640 | ovs_flow_free(flow, false); |
ccb1352e JG |
641 | err_kfree_skb: |
642 | kfree_skb(packet); | |
643 | err: | |
644 | return err; | |
645 | } | |
646 | ||
647 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 648 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
649 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
650 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 651 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 652 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
ccb1352e JG |
653 | }; |
654 | ||
4534de83 | 655 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e JG |
656 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
657 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
658 | .policy = packet_policy, | |
659 | .doit = ovs_packet_cmd_execute | |
660 | } | |
661 | }; | |
662 | ||
0c200ef9 PS |
663 | static struct genl_family dp_packet_genl_family = { |
664 | .id = GENL_ID_GENERATE, | |
665 | .hdrsize = sizeof(struct ovs_header), | |
666 | .name = OVS_PACKET_FAMILY, | |
667 | .version = OVS_PACKET_VERSION, | |
668 | .maxattr = OVS_PACKET_ATTR_MAX, | |
669 | .netnsok = true, | |
670 | .parallel_ops = true, | |
671 | .ops = dp_packet_genl_ops, | |
672 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
673 | }; | |
674 | ||
12eb18f7 | 675 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 676 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
677 | { |
678 | int i; | |
ccb1352e | 679 | |
1bd7116f AZ |
680 | memset(mega_stats, 0, sizeof(*mega_stats)); |
681 | ||
b637e498 | 682 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 683 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
684 | |
685 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 686 | |
ccb1352e JG |
687 | for_each_possible_cpu(i) { |
688 | const struct dp_stats_percpu *percpu_stats; | |
689 | struct dp_stats_percpu local_stats; | |
690 | unsigned int start; | |
691 | ||
692 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
693 | ||
694 | do { | |
57a7744e | 695 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 696 | local_stats = *percpu_stats; |
57a7744e | 697 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
698 | |
699 | stats->n_hit += local_stats.n_hit; | |
700 | stats->n_missed += local_stats.n_missed; | |
701 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 702 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
703 | } |
704 | } | |
705 | ||
74ed7ab9 JS |
706 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
707 | { | |
708 | return ovs_identifier_is_ufid(sfid) && | |
709 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
710 | } | |
711 | ||
712 | static bool should_fill_mask(uint32_t ufid_flags) | |
713 | { | |
714 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
715 | } | |
716 | ||
717 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 718 | { |
74ed7ab9 JS |
719 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
720 | } | |
721 | ||
722 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
723 | const struct sw_flow_id *sfid, | |
724 | uint32_t ufid_flags) | |
725 | { | |
726 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
727 | ||
728 | /* OVS_FLOW_ATTR_UFID */ | |
729 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
730 | len += nla_total_size(sfid->ufid_len); | |
731 | ||
732 | /* OVS_FLOW_ATTR_KEY */ | |
733 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
734 | len += nla_total_size(ovs_key_attr_size()); | |
735 | ||
736 | /* OVS_FLOW_ATTR_MASK */ | |
737 | if (should_fill_mask(ufid_flags)) | |
738 | len += nla_total_size(ovs_key_attr_size()); | |
739 | ||
740 | /* OVS_FLOW_ATTR_ACTIONS */ | |
741 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 742 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
743 | |
744 | return len | |
c3ff8cfe TG |
745 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
746 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
74ed7ab9 | 747 | + nla_total_size(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
748 | } |
749 | ||
ca7105f2 JS |
750 | /* Called with ovs_mutex or RCU read lock. */ |
751 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
752 | struct sk_buff *skb) | |
753 | { | |
754 | struct ovs_flow_stats stats; | |
755 | __be16 tcp_flags; | |
756 | unsigned long used; | |
ccb1352e | 757 | |
e298e505 | 758 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 759 | |
028d6a67 DM |
760 | if (used && |
761 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
ca7105f2 | 762 | return -EMSGSIZE; |
ccb1352e | 763 | |
028d6a67 | 764 | if (stats.n_packets && |
e298e505 | 765 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) |
ca7105f2 | 766 | return -EMSGSIZE; |
ccb1352e | 767 | |
e298e505 PS |
768 | if ((u8)ntohs(tcp_flags) && |
769 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
770 | return -EMSGSIZE; |
771 | ||
772 | return 0; | |
773 | } | |
774 | ||
775 | /* Called with ovs_mutex or RCU read lock. */ | |
776 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
777 | struct sk_buff *skb, int skb_orig_len) | |
778 | { | |
779 | struct nlattr *start; | |
780 | int err; | |
ccb1352e JG |
781 | |
782 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
783 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
784 | * Netlink but individual action lists can be longer than | |
785 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
786 | * The userspace caller can always fetch the actions separately if it | |
787 | * really wants them. (Most userspace callers in fact don't care.) | |
788 | * | |
789 | * This can only fail for dump operations because the skb is always | |
790 | * properly sized for single flows. | |
791 | */ | |
74f84a57 PS |
792 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
793 | if (start) { | |
d57170b1 PS |
794 | const struct sw_flow_actions *sf_acts; |
795 | ||
663efa36 | 796 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
797 | err = ovs_nla_put_actions(sf_acts->actions, |
798 | sf_acts->actions_len, skb); | |
0e9796b4 | 799 | |
74f84a57 PS |
800 | if (!err) |
801 | nla_nest_end(skb, start); | |
802 | else { | |
803 | if (skb_orig_len) | |
ca7105f2 | 804 | return err; |
74f84a57 PS |
805 | |
806 | nla_nest_cancel(skb, start); | |
807 | } | |
ca7105f2 JS |
808 | } else if (skb_orig_len) { |
809 | return -EMSGSIZE; | |
810 | } | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | /* Called with ovs_mutex or RCU read lock. */ | |
816 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
817 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 818 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
819 | { |
820 | const int skb_orig_len = skb->len; | |
821 | struct ovs_header *ovs_header; | |
822 | int err; | |
823 | ||
824 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
825 | flags, cmd); | |
826 | if (!ovs_header) | |
827 | return -EMSGSIZE; | |
828 | ||
829 | ovs_header->dp_ifindex = dp_ifindex; | |
830 | ||
74ed7ab9 | 831 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
832 | if (err) |
833 | goto error; | |
834 | ||
74ed7ab9 JS |
835 | if (should_fill_key(&flow->id, ufid_flags)) { |
836 | err = ovs_nla_put_masked_key(flow, skb); | |
837 | if (err) | |
838 | goto error; | |
839 | } | |
840 | ||
841 | if (should_fill_mask(ufid_flags)) { | |
842 | err = ovs_nla_put_mask(flow, skb); | |
843 | if (err) | |
844 | goto error; | |
845 | } | |
ca7105f2 JS |
846 | |
847 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
848 | if (err) | |
849 | goto error; | |
850 | ||
74ed7ab9 JS |
851 | if (should_fill_actions(ufid_flags)) { |
852 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
853 | if (err) | |
854 | goto error; | |
855 | } | |
ccb1352e | 856 | |
053c095a JB |
857 | genlmsg_end(skb, ovs_header); |
858 | return 0; | |
ccb1352e | 859 | |
ccb1352e JG |
860 | error: |
861 | genlmsg_cancel(skb, ovs_header); | |
862 | return err; | |
863 | } | |
864 | ||
0e9796b4 JR |
865 | /* May not be called with RCU read lock. */ |
866 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 867 | const struct sw_flow_id *sfid, |
fb5d1e9e | 868 | struct genl_info *info, |
74ed7ab9 JS |
869 | bool always, |
870 | uint32_t ufid_flags) | |
ccb1352e | 871 | { |
fb5d1e9e | 872 | struct sk_buff *skb; |
74ed7ab9 | 873 | size_t len; |
ccb1352e | 874 | |
9b67aa4a | 875 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
876 | return NULL; |
877 | ||
74ed7ab9 JS |
878 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
879 | skb = genlmsg_new_unicast(len, info, GFP_KERNEL); | |
fb5d1e9e JR |
880 | if (!skb) |
881 | return ERR_PTR(-ENOMEM); | |
882 | ||
883 | return skb; | |
ccb1352e JG |
884 | } |
885 | ||
0e9796b4 JR |
886 | /* Called with ovs_mutex. */ |
887 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
888 | int dp_ifindex, | |
889 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 890 | bool always, u32 ufid_flags) |
ccb1352e JG |
891 | { |
892 | struct sk_buff *skb; | |
893 | int retval; | |
894 | ||
74ed7ab9 JS |
895 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
896 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 897 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 898 | return skb; |
ccb1352e | 899 | |
0e9796b4 JR |
900 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
901 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 902 | cmd, ufid_flags); |
ccb1352e JG |
903 | BUG_ON(retval < 0); |
904 | return skb; | |
905 | } | |
906 | ||
37bdc87b | 907 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 908 | { |
7f8a436e | 909 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
910 | struct nlattr **a = info->attrs; |
911 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 912 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 913 | struct sw_flow_mask mask; |
ccb1352e JG |
914 | struct sk_buff *reply; |
915 | struct datapath *dp; | |
74ed7ab9 | 916 | struct sw_flow_key key; |
37bdc87b | 917 | struct sw_flow_actions *acts; |
03f0d916 | 918 | struct sw_flow_match match; |
74ed7ab9 | 919 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 920 | int error; |
05da5898 | 921 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 922 | |
893f139b | 923 | /* Must have key and actions. */ |
ccb1352e | 924 | error = -EINVAL; |
426cda5c | 925 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 926 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 927 | goto error; |
426cda5c JG |
928 | } |
929 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 930 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 931 | goto error; |
426cda5c | 932 | } |
03f0d916 | 933 | |
893f139b JR |
934 | /* Most of the time we need to allocate a new flow, do it before |
935 | * locking. | |
936 | */ | |
937 | new_flow = ovs_flow_alloc(); | |
938 | if (IS_ERR(new_flow)) { | |
939 | error = PTR_ERR(new_flow); | |
940 | goto error; | |
941 | } | |
942 | ||
943 | /* Extract key. */ | |
74ed7ab9 | 944 | ovs_match_init(&match, &key, &mask); |
c2ac6673 | 945 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 946 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 947 | if (error) |
893f139b | 948 | goto err_kfree_flow; |
ccb1352e | 949 | |
ae5f2fb1 | 950 | ovs_flow_mask_key(&new_flow->key, &key, true, &mask); |
74ed7ab9 JS |
951 | |
952 | /* Extract flow identifier. */ | |
953 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
954 | &key, log); | |
955 | if (error) | |
956 | goto err_kfree_flow; | |
74f84a57 | 957 | |
893f139b | 958 | /* Validate actions. */ |
7f8a436e JS |
959 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
960 | &new_flow->key, &acts, log); | |
37bdc87b | 961 | if (error) { |
05da5898 | 962 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 963 | goto err_kfree_flow; |
893f139b JR |
964 | } |
965 | ||
74ed7ab9 JS |
966 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
967 | ufid_flags); | |
893f139b JR |
968 | if (IS_ERR(reply)) { |
969 | error = PTR_ERR(reply); | |
970 | goto err_kfree_acts; | |
ccb1352e JG |
971 | } |
972 | ||
8e4e1713 | 973 | ovs_lock(); |
7f8a436e | 974 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
975 | if (unlikely(!dp)) { |
976 | error = -ENODEV; | |
8e4e1713 | 977 | goto err_unlock_ovs; |
893f139b | 978 | } |
74ed7ab9 | 979 | |
03f0d916 | 980 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
981 | if (ovs_identifier_is_ufid(&new_flow->id)) |
982 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
983 | if (!flow) | |
984 | flow = ovs_flow_tbl_lookup(&dp->table, &key); | |
893f139b JR |
985 | if (likely(!flow)) { |
986 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
987 | |
988 | /* Put flow in bucket. */ | |
893f139b JR |
989 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
990 | if (unlikely(error)) { | |
618ed0c8 | 991 | acts = NULL; |
893f139b JR |
992 | goto err_unlock_ovs; |
993 | } | |
994 | ||
995 | if (unlikely(reply)) { | |
996 | error = ovs_flow_cmd_fill_info(new_flow, | |
997 | ovs_header->dp_ifindex, | |
998 | reply, info->snd_portid, | |
999 | info->snd_seq, 0, | |
74ed7ab9 JS |
1000 | OVS_FLOW_CMD_NEW, |
1001 | ufid_flags); | |
893f139b | 1002 | BUG_ON(error < 0); |
618ed0c8 | 1003 | } |
893f139b | 1004 | ovs_unlock(); |
ccb1352e | 1005 | } else { |
37bdc87b JR |
1006 | struct sw_flow_actions *old_acts; |
1007 | ||
ccb1352e JG |
1008 | /* Bail out if we're not allowed to modify an existing flow. |
1009 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1010 | * because Generic Netlink treats the latter as a dump | |
1011 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1012 | * gets fixed. | |
1013 | */ | |
893f139b JR |
1014 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1015 | | NLM_F_EXCL))) { | |
1016 | error = -EEXIST; | |
8e4e1713 | 1017 | goto err_unlock_ovs; |
893f139b | 1018 | } |
74ed7ab9 JS |
1019 | /* The flow identifier has to be the same for flow updates. |
1020 | * Look for any overlapping flow. | |
1021 | */ | |
1022 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1023 | if (ovs_identifier_is_key(&flow->id)) | |
1024 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1025 | &match); | |
1026 | else /* UFID matches but key is different */ | |
1027 | flow = NULL; | |
4a46b24e AW |
1028 | if (!flow) { |
1029 | error = -ENOENT; | |
1030 | goto err_unlock_ovs; | |
1031 | } | |
893f139b | 1032 | } |
37bdc87b JR |
1033 | /* Update actions. */ |
1034 | old_acts = ovsl_dereference(flow->sf_acts); | |
1035 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1036 | |
893f139b JR |
1037 | if (unlikely(reply)) { |
1038 | error = ovs_flow_cmd_fill_info(flow, | |
1039 | ovs_header->dp_ifindex, | |
1040 | reply, info->snd_portid, | |
1041 | info->snd_seq, 0, | |
74ed7ab9 JS |
1042 | OVS_FLOW_CMD_NEW, |
1043 | ufid_flags); | |
893f139b JR |
1044 | BUG_ON(error < 0); |
1045 | } | |
1046 | ovs_unlock(); | |
37bdc87b | 1047 | |
34ae932a | 1048 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1049 | ovs_flow_free(new_flow, false); |
37bdc87b | 1050 | } |
893f139b JR |
1051 | |
1052 | if (reply) | |
1053 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1054 | return 0; |
1055 | ||
37bdc87b JR |
1056 | err_unlock_ovs: |
1057 | ovs_unlock(); | |
893f139b JR |
1058 | kfree_skb(reply); |
1059 | err_kfree_acts: | |
34ae932a | 1060 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1061 | err_kfree_flow: |
1062 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1063 | error: |
1064 | return error; | |
1065 | } | |
ccb1352e | 1066 | |
2fdb957d | 1067 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
7f8a436e JS |
1068 | static struct sw_flow_actions *get_flow_actions(struct net *net, |
1069 | const struct nlattr *a, | |
6b205b2c | 1070 | const struct sw_flow_key *key, |
05da5898 JR |
1071 | const struct sw_flow_mask *mask, |
1072 | bool log) | |
6b205b2c JG |
1073 | { |
1074 | struct sw_flow_actions *acts; | |
1075 | struct sw_flow_key masked_key; | |
1076 | int error; | |
1077 | ||
ae5f2fb1 | 1078 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1079 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1080 | if (error) { |
05da5898 JR |
1081 | OVS_NLERR(log, |
1082 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1083 | return ERR_PTR(error); |
1084 | } | |
1085 | ||
1086 | return acts; | |
1087 | } | |
1088 | ||
37bdc87b JR |
1089 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1090 | { | |
7f8a436e | 1091 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1092 | struct nlattr **a = info->attrs; |
1093 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1094 | struct sw_flow_key key; |
37bdc87b JR |
1095 | struct sw_flow *flow; |
1096 | struct sw_flow_mask mask; | |
1097 | struct sk_buff *reply = NULL; | |
1098 | struct datapath *dp; | |
893f139b | 1099 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1100 | struct sw_flow_match match; |
74ed7ab9 JS |
1101 | struct sw_flow_id sfid; |
1102 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
37bdc87b | 1103 | int error; |
05da5898 | 1104 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1105 | bool ufid_present; |
37bdc87b JR |
1106 | |
1107 | /* Extract key. */ | |
1108 | error = -EINVAL; | |
426cda5c | 1109 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 1110 | OVS_NLERR(log, "Flow key attribute not present in set flow."); |
37bdc87b | 1111 | goto error; |
426cda5c | 1112 | } |
37bdc87b | 1113 | |
74ed7ab9 | 1114 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
37bdc87b | 1115 | ovs_match_init(&match, &key, &mask); |
c2ac6673 | 1116 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 1117 | a[OVS_FLOW_ATTR_MASK], log); |
37bdc87b JR |
1118 | if (error) |
1119 | goto error; | |
1120 | ||
1121 | /* Validate actions. */ | |
1122 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
7f8a436e JS |
1123 | acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], &key, |
1124 | &mask, log); | |
6b205b2c JG |
1125 | if (IS_ERR(acts)) { |
1126 | error = PTR_ERR(acts); | |
37bdc87b | 1127 | goto error; |
893f139b | 1128 | } |
893f139b | 1129 | |
2fdb957d | 1130 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1131 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1132 | ufid_flags); | |
893f139b JR |
1133 | if (IS_ERR(reply)) { |
1134 | error = PTR_ERR(reply); | |
1135 | goto err_kfree_acts; | |
be52c9e9 | 1136 | } |
37bdc87b | 1137 | } |
0e9796b4 | 1138 | |
37bdc87b | 1139 | ovs_lock(); |
7f8a436e | 1140 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1141 | if (unlikely(!dp)) { |
1142 | error = -ENODEV; | |
37bdc87b | 1143 | goto err_unlock_ovs; |
893f139b | 1144 | } |
37bdc87b | 1145 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1146 | if (ufid_present) |
1147 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1148 | else | |
1149 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1150 | if (unlikely(!flow)) { |
1151 | error = -ENOENT; | |
37bdc87b | 1152 | goto err_unlock_ovs; |
893f139b | 1153 | } |
4a46b24e | 1154 | |
37bdc87b | 1155 | /* Update actions, if present. */ |
893f139b | 1156 | if (likely(acts)) { |
37bdc87b JR |
1157 | old_acts = ovsl_dereference(flow->sf_acts); |
1158 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1159 | |
1160 | if (unlikely(reply)) { | |
1161 | error = ovs_flow_cmd_fill_info(flow, | |
1162 | ovs_header->dp_ifindex, | |
1163 | reply, info->snd_portid, | |
1164 | info->snd_seq, 0, | |
74ed7ab9 JS |
1165 | OVS_FLOW_CMD_NEW, |
1166 | ufid_flags); | |
893f139b JR |
1167 | BUG_ON(error < 0); |
1168 | } | |
1169 | } else { | |
1170 | /* Could not alloc without acts before locking. */ | |
1171 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
74ed7ab9 JS |
1172 | info, OVS_FLOW_CMD_NEW, false, |
1173 | ufid_flags); | |
1174 | ||
b5ffe634 | 1175 | if (IS_ERR(reply)) { |
893f139b JR |
1176 | error = PTR_ERR(reply); |
1177 | goto err_unlock_ovs; | |
1178 | } | |
ccb1352e | 1179 | } |
37bdc87b | 1180 | |
37bdc87b JR |
1181 | /* Clear stats. */ |
1182 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1183 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1184 | ovs_unlock(); |
ccb1352e | 1185 | |
893f139b JR |
1186 | if (reply) |
1187 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1188 | if (old_acts) | |
34ae932a | 1189 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1190 | |
ccb1352e JG |
1191 | return 0; |
1192 | ||
8e4e1713 PS |
1193 | err_unlock_ovs: |
1194 | ovs_unlock(); | |
893f139b JR |
1195 | kfree_skb(reply); |
1196 | err_kfree_acts: | |
34ae932a | 1197 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1198 | error: |
1199 | return error; | |
1200 | } | |
1201 | ||
1202 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1203 | { | |
1204 | struct nlattr **a = info->attrs; | |
1205 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1206 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1207 | struct sw_flow_key key; |
1208 | struct sk_buff *reply; | |
1209 | struct sw_flow *flow; | |
1210 | struct datapath *dp; | |
03f0d916 | 1211 | struct sw_flow_match match; |
74ed7ab9 JS |
1212 | struct sw_flow_id ufid; |
1213 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1214 | int err = 0; | |
05da5898 | 1215 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1216 | bool ufid_present; |
ccb1352e | 1217 | |
74ed7ab9 JS |
1218 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1219 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1220 | ovs_match_init(&match, &key, NULL); | |
c2ac6673 | 1221 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1222 | log); |
1223 | } else if (!ufid_present) { | |
05da5898 JR |
1224 | OVS_NLERR(log, |
1225 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1226 | err = -EINVAL; |
03f0d916 | 1227 | } |
ccb1352e JG |
1228 | if (err) |
1229 | return err; | |
1230 | ||
8e4e1713 | 1231 | ovs_lock(); |
46df7b81 | 1232 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1233 | if (!dp) { |
1234 | err = -ENODEV; | |
1235 | goto unlock; | |
1236 | } | |
ccb1352e | 1237 | |
74ed7ab9 JS |
1238 | if (ufid_present) |
1239 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1240 | else | |
1241 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1242 | if (!flow) { |
8e4e1713 PS |
1243 | err = -ENOENT; |
1244 | goto unlock; | |
1245 | } | |
ccb1352e | 1246 | |
0e9796b4 | 1247 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
74ed7ab9 | 1248 | OVS_FLOW_CMD_NEW, true, ufid_flags); |
8e4e1713 PS |
1249 | if (IS_ERR(reply)) { |
1250 | err = PTR_ERR(reply); | |
1251 | goto unlock; | |
1252 | } | |
ccb1352e | 1253 | |
8e4e1713 | 1254 | ovs_unlock(); |
ccb1352e | 1255 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1256 | unlock: |
1257 | ovs_unlock(); | |
1258 | return err; | |
ccb1352e JG |
1259 | } |
1260 | ||
1261 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1262 | { | |
1263 | struct nlattr **a = info->attrs; | |
1264 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1265 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1266 | struct sw_flow_key key; |
1267 | struct sk_buff *reply; | |
74ed7ab9 | 1268 | struct sw_flow *flow = NULL; |
ccb1352e | 1269 | struct datapath *dp; |
03f0d916 | 1270 | struct sw_flow_match match; |
74ed7ab9 JS |
1271 | struct sw_flow_id ufid; |
1272 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1273 | int err; |
05da5898 | 1274 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1275 | bool ufid_present; |
ccb1352e | 1276 | |
74ed7ab9 JS |
1277 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1278 | if (a[OVS_FLOW_ATTR_KEY]) { | |
aed06778 | 1279 | ovs_match_init(&match, &key, NULL); |
c2ac6673 JS |
1280 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1281 | NULL, log); | |
aed06778 JR |
1282 | if (unlikely(err)) |
1283 | return err; | |
1284 | } | |
1285 | ||
8e4e1713 | 1286 | ovs_lock(); |
46df7b81 | 1287 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1288 | if (unlikely(!dp)) { |
8e4e1713 PS |
1289 | err = -ENODEV; |
1290 | goto unlock; | |
1291 | } | |
46df7b81 | 1292 | |
74ed7ab9 | 1293 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1294 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1295 | goto unlock; |
1296 | } | |
03f0d916 | 1297 | |
74ed7ab9 JS |
1298 | if (ufid_present) |
1299 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1300 | else | |
1301 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1302 | if (unlikely(!flow)) { |
8e4e1713 PS |
1303 | err = -ENOENT; |
1304 | goto unlock; | |
1305 | } | |
ccb1352e | 1306 | |
b637e498 | 1307 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1308 | ovs_unlock(); |
ccb1352e | 1309 | |
aed06778 | 1310 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1311 | &flow->id, info, false, ufid_flags); |
aed06778 JR |
1312 | if (likely(reply)) { |
1313 | if (likely(!IS_ERR(reply))) { | |
1314 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1315 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1316 | reply, info->snd_portid, | |
1317 | info->snd_seq, 0, | |
74ed7ab9 JS |
1318 | OVS_FLOW_CMD_DEL, |
1319 | ufid_flags); | |
aed06778 JR |
1320 | rcu_read_unlock(); |
1321 | BUG_ON(err < 0); | |
1322 | ||
1323 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1324 | } else { | |
1325 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1326 | } | |
fb5d1e9e | 1327 | } |
ccb1352e | 1328 | |
aed06778 | 1329 | ovs_flow_free(flow, true); |
ccb1352e | 1330 | return 0; |
8e4e1713 PS |
1331 | unlock: |
1332 | ovs_unlock(); | |
1333 | return err; | |
ccb1352e JG |
1334 | } |
1335 | ||
1336 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1337 | { | |
74ed7ab9 | 1338 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1339 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1340 | struct table_instance *ti; |
ccb1352e | 1341 | struct datapath *dp; |
74ed7ab9 JS |
1342 | u32 ufid_flags; |
1343 | int err; | |
1344 | ||
1345 | err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a, | |
1346 | OVS_FLOW_ATTR_MAX, flow_policy); | |
1347 | if (err) | |
1348 | return err; | |
1349 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1350 | |
d57170b1 | 1351 | rcu_read_lock(); |
cc3a5ae6 | 1352 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1353 | if (!dp) { |
d57170b1 | 1354 | rcu_read_unlock(); |
ccb1352e | 1355 | return -ENODEV; |
8e4e1713 | 1356 | } |
ccb1352e | 1357 | |
b637e498 | 1358 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1359 | for (;;) { |
1360 | struct sw_flow *flow; | |
1361 | u32 bucket, obj; | |
1362 | ||
1363 | bucket = cb->args[0]; | |
1364 | obj = cb->args[1]; | |
b637e498 | 1365 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1366 | if (!flow) |
1367 | break; | |
1368 | ||
0e9796b4 | 1369 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1370 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1371 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
74ed7ab9 | 1372 | OVS_FLOW_CMD_NEW, ufid_flags) < 0) |
ccb1352e JG |
1373 | break; |
1374 | ||
1375 | cb->args[0] = bucket; | |
1376 | cb->args[1] = obj; | |
1377 | } | |
d57170b1 | 1378 | rcu_read_unlock(); |
ccb1352e JG |
1379 | return skb->len; |
1380 | } | |
1381 | ||
0c200ef9 PS |
1382 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1383 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1384 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1385 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1386 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1387 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1388 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1389 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1390 | }; |
1391 | ||
48e48a70 | 1392 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e JG |
1393 | { .cmd = OVS_FLOW_CMD_NEW, |
1394 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1395 | .policy = flow_policy, | |
37bdc87b | 1396 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1397 | }, |
1398 | { .cmd = OVS_FLOW_CMD_DEL, | |
1399 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1400 | .policy = flow_policy, | |
1401 | .doit = ovs_flow_cmd_del | |
1402 | }, | |
1403 | { .cmd = OVS_FLOW_CMD_GET, | |
1404 | .flags = 0, /* OK for unprivileged users. */ | |
1405 | .policy = flow_policy, | |
1406 | .doit = ovs_flow_cmd_get, | |
1407 | .dumpit = ovs_flow_cmd_dump | |
1408 | }, | |
1409 | { .cmd = OVS_FLOW_CMD_SET, | |
1410 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1411 | .policy = flow_policy, | |
37bdc87b | 1412 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1413 | }, |
1414 | }; | |
1415 | ||
0c200ef9 | 1416 | static struct genl_family dp_flow_genl_family = { |
ccb1352e JG |
1417 | .id = GENL_ID_GENERATE, |
1418 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1419 | .name = OVS_FLOW_FAMILY, |
1420 | .version = OVS_FLOW_VERSION, | |
1421 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3a4e0d6a PS |
1422 | .netnsok = true, |
1423 | .parallel_ops = true, | |
0c200ef9 PS |
1424 | .ops = dp_flow_genl_ops, |
1425 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1426 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1427 | .n_mcgrps = 1, | |
ccb1352e JG |
1428 | }; |
1429 | ||
c3ff8cfe TG |
1430 | static size_t ovs_dp_cmd_msg_size(void) |
1431 | { | |
1432 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1433 | ||
1434 | msgsize += nla_total_size(IFNAMSIZ); | |
1435 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1bd7116f | 1436 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
45fb9c35 | 1437 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1438 | |
1439 | return msgsize; | |
1440 | } | |
1441 | ||
8ec609d8 | 1442 | /* Called with ovs_mutex. */ |
ccb1352e | 1443 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1444 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1445 | { |
1446 | struct ovs_header *ovs_header; | |
1447 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1448 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1449 | int err; |
1450 | ||
15e47304 | 1451 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1452 | flags, cmd); |
1453 | if (!ovs_header) | |
1454 | goto error; | |
1455 | ||
1456 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1457 | ||
ccb1352e | 1458 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1459 | if (err) |
1460 | goto nla_put_failure; | |
1461 | ||
1bd7116f AZ |
1462 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1463 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1464 | &dp_stats)) | |
1465 | goto nla_put_failure; | |
1466 | ||
1467 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1468 | sizeof(struct ovs_dp_megaflow_stats), | |
1469 | &dp_megaflow_stats)) | |
028d6a67 | 1470 | goto nla_put_failure; |
ccb1352e | 1471 | |
43d4be9c TG |
1472 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1473 | goto nla_put_failure; | |
1474 | ||
053c095a JB |
1475 | genlmsg_end(skb, ovs_header); |
1476 | return 0; | |
ccb1352e JG |
1477 | |
1478 | nla_put_failure: | |
1479 | genlmsg_cancel(skb, ovs_header); | |
1480 | error: | |
1481 | return -EMSGSIZE; | |
1482 | } | |
1483 | ||
6093ae9a | 1484 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
ccb1352e | 1485 | { |
6093ae9a | 1486 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
ccb1352e JG |
1487 | } |
1488 | ||
bb6f9a70 | 1489 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1490 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1491 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1492 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1493 | { | |
1494 | struct datapath *dp; | |
1495 | ||
1496 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1497 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1498 | else { |
1499 | struct vport *vport; | |
1500 | ||
46df7b81 | 1501 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1502 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1503 | } |
1504 | return dp ? dp : ERR_PTR(-ENODEV); | |
1505 | } | |
1506 | ||
44da5ae5 TG |
1507 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1508 | { | |
1509 | struct datapath *dp; | |
1510 | ||
1511 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1512 | if (IS_ERR(dp)) |
44da5ae5 TG |
1513 | return; |
1514 | ||
1515 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1516 | dp->user_features = 0; | |
1517 | } | |
1518 | ||
12eb18f7 | 1519 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
43d4be9c TG |
1520 | { |
1521 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1522 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1523 | } | |
1524 | ||
ccb1352e JG |
1525 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1526 | { | |
1527 | struct nlattr **a = info->attrs; | |
1528 | struct vport_parms parms; | |
1529 | struct sk_buff *reply; | |
1530 | struct datapath *dp; | |
1531 | struct vport *vport; | |
46df7b81 | 1532 | struct ovs_net *ovs_net; |
15eac2a7 | 1533 | int err, i; |
ccb1352e JG |
1534 | |
1535 | err = -EINVAL; | |
1536 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1537 | goto err; | |
1538 | ||
6093ae9a JR |
1539 | reply = ovs_dp_cmd_alloc_info(info); |
1540 | if (!reply) | |
1541 | return -ENOMEM; | |
ccb1352e JG |
1542 | |
1543 | err = -ENOMEM; | |
1544 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1545 | if (dp == NULL) | |
6093ae9a | 1546 | goto err_free_reply; |
46df7b81 | 1547 | |
efd7ef1c | 1548 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1549 | |
1550 | /* Allocate table. */ | |
b637e498 PS |
1551 | err = ovs_flow_tbl_init(&dp->table); |
1552 | if (err) | |
ccb1352e JG |
1553 | goto err_free_dp; |
1554 | ||
1c213bd2 | 1555 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1556 | if (!dp->stats_percpu) { |
1557 | err = -ENOMEM; | |
1558 | goto err_destroy_table; | |
1559 | } | |
1560 | ||
15eac2a7 | 1561 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
e6445719 | 1562 | GFP_KERNEL); |
15eac2a7 PS |
1563 | if (!dp->ports) { |
1564 | err = -ENOMEM; | |
1565 | goto err_destroy_percpu; | |
1566 | } | |
1567 | ||
1568 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1569 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1570 | ||
ccb1352e JG |
1571 | /* Set up our datapath device. */ |
1572 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1573 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1574 | parms.options = NULL; | |
1575 | parms.dp = dp; | |
1576 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1577 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1578 | |
43d4be9c TG |
1579 | ovs_dp_change(dp, a); |
1580 | ||
6093ae9a JR |
1581 | /* So far only local changes have been made, now need the lock. */ |
1582 | ovs_lock(); | |
1583 | ||
ccb1352e JG |
1584 | vport = new_vport(&parms); |
1585 | if (IS_ERR(vport)) { | |
1586 | err = PTR_ERR(vport); | |
1587 | if (err == -EBUSY) | |
1588 | err = -EEXIST; | |
1589 | ||
44da5ae5 TG |
1590 | if (err == -EEXIST) { |
1591 | /* An outdated user space instance that does not understand | |
1592 | * the concept of user_features has attempted to create a new | |
1593 | * datapath and is likely to reuse it. Drop all user features. | |
1594 | */ | |
1595 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1596 | ovs_dp_reset_user_features(skb, info); | |
1597 | } | |
1598 | ||
15eac2a7 | 1599 | goto err_destroy_ports_array; |
ccb1352e JG |
1600 | } |
1601 | ||
6093ae9a JR |
1602 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1603 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1604 | BUG_ON(err < 0); | |
ccb1352e | 1605 | |
46df7b81 | 1606 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1607 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1608 | |
1609 | ovs_unlock(); | |
ccb1352e | 1610 | |
2a94fe48 | 1611 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1612 | return 0; |
1613 | ||
15eac2a7 | 1614 | err_destroy_ports_array: |
6093ae9a | 1615 | ovs_unlock(); |
15eac2a7 | 1616 | kfree(dp->ports); |
ccb1352e JG |
1617 | err_destroy_percpu: |
1618 | free_percpu(dp->stats_percpu); | |
1619 | err_destroy_table: | |
9b996e54 | 1620 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e JG |
1621 | err_free_dp: |
1622 | kfree(dp); | |
6093ae9a JR |
1623 | err_free_reply: |
1624 | kfree_skb(reply); | |
ccb1352e JG |
1625 | err: |
1626 | return err; | |
1627 | } | |
1628 | ||
8e4e1713 | 1629 | /* Called with ovs_mutex. */ |
46df7b81 | 1630 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1631 | { |
15eac2a7 | 1632 | int i; |
ccb1352e | 1633 | |
15eac2a7 PS |
1634 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1635 | struct vport *vport; | |
b67bfe0d | 1636 | struct hlist_node *n; |
15eac2a7 | 1637 | |
b67bfe0d | 1638 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1639 | if (vport->port_no != OVSP_LOCAL) |
1640 | ovs_dp_detach_port(vport); | |
1641 | } | |
ccb1352e | 1642 | |
59a35d60 | 1643 | list_del_rcu(&dp->list_node); |
ccb1352e | 1644 | |
8e4e1713 | 1645 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1646 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1647 | */ |
8e4e1713 | 1648 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1649 | |
e80857cc | 1650 | /* RCU destroy the flow table */ |
ccb1352e | 1651 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1652 | } |
1653 | ||
1654 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1655 | { | |
1656 | struct sk_buff *reply; | |
1657 | struct datapath *dp; | |
1658 | int err; | |
1659 | ||
6093ae9a JR |
1660 | reply = ovs_dp_cmd_alloc_info(info); |
1661 | if (!reply) | |
1662 | return -ENOMEM; | |
1663 | ||
8e4e1713 | 1664 | ovs_lock(); |
46df7b81 PS |
1665 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1666 | err = PTR_ERR(dp); | |
1667 | if (IS_ERR(dp)) | |
6093ae9a | 1668 | goto err_unlock_free; |
46df7b81 | 1669 | |
6093ae9a JR |
1670 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1671 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1672 | BUG_ON(err < 0); | |
46df7b81 PS |
1673 | |
1674 | __dp_destroy(dp); | |
8e4e1713 | 1675 | ovs_unlock(); |
ccb1352e | 1676 | |
2a94fe48 | 1677 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1678 | |
1679 | return 0; | |
6093ae9a JR |
1680 | |
1681 | err_unlock_free: | |
8e4e1713 | 1682 | ovs_unlock(); |
6093ae9a | 1683 | kfree_skb(reply); |
8e4e1713 | 1684 | return err; |
ccb1352e JG |
1685 | } |
1686 | ||
1687 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1688 | { | |
1689 | struct sk_buff *reply; | |
1690 | struct datapath *dp; | |
1691 | int err; | |
1692 | ||
6093ae9a JR |
1693 | reply = ovs_dp_cmd_alloc_info(info); |
1694 | if (!reply) | |
1695 | return -ENOMEM; | |
1696 | ||
8e4e1713 | 1697 | ovs_lock(); |
46df7b81 | 1698 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1699 | err = PTR_ERR(dp); |
ccb1352e | 1700 | if (IS_ERR(dp)) |
6093ae9a | 1701 | goto err_unlock_free; |
ccb1352e | 1702 | |
43d4be9c TG |
1703 | ovs_dp_change(dp, info->attrs); |
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); | |
ccb1352e | 1708 | |
8e4e1713 | 1709 | ovs_unlock(); |
2a94fe48 | 1710 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1711 | |
1712 | return 0; | |
6093ae9a JR |
1713 | |
1714 | err_unlock_free: | |
8e4e1713 | 1715 | ovs_unlock(); |
6093ae9a | 1716 | kfree_skb(reply); |
8e4e1713 | 1717 | return err; |
ccb1352e JG |
1718 | } |
1719 | ||
1720 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1721 | { | |
1722 | struct sk_buff *reply; | |
1723 | struct datapath *dp; | |
8e4e1713 | 1724 | int err; |
ccb1352e | 1725 | |
6093ae9a JR |
1726 | reply = ovs_dp_cmd_alloc_info(info); |
1727 | if (!reply) | |
1728 | return -ENOMEM; | |
1729 | ||
8ec609d8 | 1730 | ovs_lock(); |
46df7b81 | 1731 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1732 | if (IS_ERR(dp)) { |
1733 | err = PTR_ERR(dp); | |
6093ae9a | 1734 | goto err_unlock_free; |
8e4e1713 | 1735 | } |
6093ae9a JR |
1736 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1737 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1738 | BUG_ON(err < 0); | |
8ec609d8 | 1739 | ovs_unlock(); |
ccb1352e JG |
1740 | |
1741 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1742 | |
6093ae9a | 1743 | err_unlock_free: |
8ec609d8 | 1744 | ovs_unlock(); |
6093ae9a | 1745 | kfree_skb(reply); |
8e4e1713 | 1746 | return err; |
ccb1352e JG |
1747 | } |
1748 | ||
1749 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1750 | { | |
46df7b81 | 1751 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1752 | struct datapath *dp; |
1753 | int skip = cb->args[0]; | |
1754 | int i = 0; | |
1755 | ||
8ec609d8 PS |
1756 | ovs_lock(); |
1757 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1758 | if (i >= skip && |
15e47304 | 1759 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1760 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1761 | OVS_DP_CMD_NEW) < 0) | |
1762 | break; | |
1763 | i++; | |
1764 | } | |
8ec609d8 | 1765 | ovs_unlock(); |
ccb1352e JG |
1766 | |
1767 | cb->args[0] = i; | |
1768 | ||
1769 | return skb->len; | |
1770 | } | |
1771 | ||
0c200ef9 PS |
1772 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1773 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1774 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1775 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1776 | }; | |
1777 | ||
48e48a70 | 1778 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e JG |
1779 | { .cmd = OVS_DP_CMD_NEW, |
1780 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1781 | .policy = datapath_policy, | |
1782 | .doit = ovs_dp_cmd_new | |
1783 | }, | |
1784 | { .cmd = OVS_DP_CMD_DEL, | |
1785 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1786 | .policy = datapath_policy, | |
1787 | .doit = ovs_dp_cmd_del | |
1788 | }, | |
1789 | { .cmd = OVS_DP_CMD_GET, | |
1790 | .flags = 0, /* OK for unprivileged users. */ | |
1791 | .policy = datapath_policy, | |
1792 | .doit = ovs_dp_cmd_get, | |
1793 | .dumpit = ovs_dp_cmd_dump | |
1794 | }, | |
1795 | { .cmd = OVS_DP_CMD_SET, | |
1796 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1797 | .policy = datapath_policy, | |
1798 | .doit = ovs_dp_cmd_set, | |
1799 | }, | |
1800 | }; | |
1801 | ||
0c200ef9 | 1802 | static struct genl_family dp_datapath_genl_family = { |
ccb1352e JG |
1803 | .id = GENL_ID_GENERATE, |
1804 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1805 | .name = OVS_DATAPATH_FAMILY, |
1806 | .version = OVS_DATAPATH_VERSION, | |
1807 | .maxattr = OVS_DP_ATTR_MAX, | |
3a4e0d6a PS |
1808 | .netnsok = true, |
1809 | .parallel_ops = true, | |
0c200ef9 PS |
1810 | .ops = dp_datapath_genl_ops, |
1811 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1812 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1813 | .n_mcgrps = 1, | |
ccb1352e JG |
1814 | }; |
1815 | ||
8e4e1713 | 1816 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1817 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1818 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1819 | { |
1820 | struct ovs_header *ovs_header; | |
1821 | struct ovs_vport_stats vport_stats; | |
1822 | int err; | |
1823 | ||
15e47304 | 1824 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1825 | flags, cmd); |
1826 | if (!ovs_header) | |
1827 | return -EMSGSIZE; | |
1828 | ||
1829 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1830 | ||
028d6a67 DM |
1831 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1832 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 1833 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
c9db965c | 1834 | ovs_vport_name(vport))) |
028d6a67 | 1835 | goto nla_put_failure; |
ccb1352e JG |
1836 | |
1837 | ovs_vport_get_stats(vport, &vport_stats); | |
028d6a67 DM |
1838 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1839 | &vport_stats)) | |
1840 | goto nla_put_failure; | |
ccb1352e | 1841 | |
5cd667b0 AW |
1842 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1843 | goto nla_put_failure; | |
1844 | ||
ccb1352e JG |
1845 | err = ovs_vport_get_options(vport, skb); |
1846 | if (err == -EMSGSIZE) | |
1847 | goto error; | |
1848 | ||
053c095a JB |
1849 | genlmsg_end(skb, ovs_header); |
1850 | return 0; | |
ccb1352e JG |
1851 | |
1852 | nla_put_failure: | |
1853 | err = -EMSGSIZE; | |
1854 | error: | |
1855 | genlmsg_cancel(skb, ovs_header); | |
1856 | return err; | |
1857 | } | |
1858 | ||
6093ae9a JR |
1859 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1860 | { | |
1861 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1862 | } | |
1863 | ||
1864 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
15e47304 | 1865 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1866 | u32 seq, u8 cmd) |
1867 | { | |
1868 | struct sk_buff *skb; | |
1869 | int retval; | |
1870 | ||
1871 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1872 | if (!skb) | |
1873 | return ERR_PTR(-ENOMEM); | |
1874 | ||
15e47304 | 1875 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1876 | BUG_ON(retval < 0); |
1877 | ||
ccb1352e JG |
1878 | return skb; |
1879 | } | |
1880 | ||
8e4e1713 | 1881 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 1882 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 1883 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1884 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1885 | { | |
1886 | struct datapath *dp; | |
1887 | struct vport *vport; | |
1888 | ||
1889 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1890 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1891 | if (!vport) |
1892 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1893 | if (ovs_header->dp_ifindex && |
1894 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1895 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1896 | return vport; |
1897 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1898 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1899 | ||
1900 | if (port_no >= DP_MAX_PORTS) | |
1901 | return ERR_PTR(-EFBIG); | |
1902 | ||
46df7b81 | 1903 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1904 | if (!dp) |
1905 | return ERR_PTR(-ENODEV); | |
1906 | ||
8e4e1713 | 1907 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1908 | if (!vport) |
14408dba | 1909 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1910 | return vport; |
1911 | } else | |
1912 | return ERR_PTR(-EINVAL); | |
1913 | } | |
1914 | ||
1915 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
1916 | { | |
1917 | struct nlattr **a = info->attrs; | |
1918 | struct ovs_header *ovs_header = info->userhdr; | |
1919 | struct vport_parms parms; | |
1920 | struct sk_buff *reply; | |
1921 | struct vport *vport; | |
1922 | struct datapath *dp; | |
1923 | u32 port_no; | |
1924 | int err; | |
1925 | ||
ccb1352e JG |
1926 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1927 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a JR |
1928 | return -EINVAL; |
1929 | ||
1930 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1931 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1932 | if (port_no >= DP_MAX_PORTS) | |
1933 | return -EFBIG; | |
1934 | ||
1935 | reply = ovs_vport_cmd_alloc_info(); | |
1936 | if (!reply) | |
1937 | return -ENOMEM; | |
ccb1352e | 1938 | |
8e4e1713 | 1939 | ovs_lock(); |
62b9c8d0 | 1940 | restart: |
46df7b81 | 1941 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1942 | err = -ENODEV; |
1943 | if (!dp) | |
6093ae9a | 1944 | goto exit_unlock_free; |
ccb1352e | 1945 | |
6093ae9a | 1946 | if (port_no) { |
8e4e1713 | 1947 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1948 | err = -EBUSY; |
1949 | if (vport) | |
6093ae9a | 1950 | goto exit_unlock_free; |
ccb1352e JG |
1951 | } else { |
1952 | for (port_no = 1; ; port_no++) { | |
1953 | if (port_no >= DP_MAX_PORTS) { | |
1954 | err = -EFBIG; | |
6093ae9a | 1955 | goto exit_unlock_free; |
ccb1352e | 1956 | } |
8e4e1713 | 1957 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1958 | if (!vport) |
1959 | break; | |
1960 | } | |
1961 | } | |
1962 | ||
1963 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
1964 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1965 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
1966 | parms.dp = dp; | |
1967 | parms.port_no = port_no; | |
5cd667b0 | 1968 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
1969 | |
1970 | vport = new_vport(&parms); | |
1971 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
1972 | if (IS_ERR(vport)) { |
1973 | if (err == -EAGAIN) | |
1974 | goto restart; | |
6093ae9a | 1975 | goto exit_unlock_free; |
62b9c8d0 | 1976 | } |
ccb1352e | 1977 | |
6093ae9a JR |
1978 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1979 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1980 | BUG_ON(err < 0); | |
1981 | ovs_unlock(); | |
ed661185 | 1982 | |
2a94fe48 | 1983 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1984 | return 0; |
ccb1352e | 1985 | |
6093ae9a | 1986 | exit_unlock_free: |
8e4e1713 | 1987 | ovs_unlock(); |
6093ae9a | 1988 | kfree_skb(reply); |
ccb1352e JG |
1989 | return err; |
1990 | } | |
1991 | ||
1992 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1993 | { | |
1994 | struct nlattr **a = info->attrs; | |
1995 | struct sk_buff *reply; | |
1996 | struct vport *vport; | |
1997 | int err; | |
1998 | ||
6093ae9a JR |
1999 | reply = ovs_vport_cmd_alloc_info(); |
2000 | if (!reply) | |
2001 | return -ENOMEM; | |
2002 | ||
8e4e1713 | 2003 | ovs_lock(); |
46df7b81 | 2004 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2005 | err = PTR_ERR(vport); |
2006 | if (IS_ERR(vport)) | |
6093ae9a | 2007 | goto exit_unlock_free; |
ccb1352e | 2008 | |
ccb1352e | 2009 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2010 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2011 | err = -EINVAL; |
6093ae9a | 2012 | goto exit_unlock_free; |
a9341512 JG |
2013 | } |
2014 | ||
f44f3408 | 2015 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2016 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2017 | if (err) |
6093ae9a | 2018 | goto exit_unlock_free; |
f44f3408 | 2019 | } |
a9341512 | 2020 | |
5cd667b0 AW |
2021 | |
2022 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2023 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2024 | ||
2025 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2026 | if (err) | |
2027 | goto exit_unlock_free; | |
2028 | } | |
ccb1352e | 2029 | |
a9341512 JG |
2030 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2031 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2032 | BUG_ON(err < 0); | |
ccb1352e | 2033 | |
8e4e1713 | 2034 | ovs_unlock(); |
2a94fe48 | 2035 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2036 | return 0; |
ccb1352e | 2037 | |
6093ae9a | 2038 | exit_unlock_free: |
8e4e1713 | 2039 | ovs_unlock(); |
6093ae9a | 2040 | kfree_skb(reply); |
ccb1352e JG |
2041 | return err; |
2042 | } | |
2043 | ||
2044 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2045 | { | |
2046 | struct nlattr **a = info->attrs; | |
2047 | struct sk_buff *reply; | |
2048 | struct vport *vport; | |
2049 | int err; | |
2050 | ||
6093ae9a JR |
2051 | reply = ovs_vport_cmd_alloc_info(); |
2052 | if (!reply) | |
2053 | return -ENOMEM; | |
2054 | ||
8e4e1713 | 2055 | ovs_lock(); |
46df7b81 | 2056 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2057 | err = PTR_ERR(vport); |
2058 | if (IS_ERR(vport)) | |
6093ae9a | 2059 | goto exit_unlock_free; |
ccb1352e JG |
2060 | |
2061 | if (vport->port_no == OVSP_LOCAL) { | |
2062 | err = -EINVAL; | |
6093ae9a | 2063 | goto exit_unlock_free; |
ccb1352e JG |
2064 | } |
2065 | ||
6093ae9a JR |
2066 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2067 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
2068 | BUG_ON(err < 0); | |
ccb1352e | 2069 | ovs_dp_detach_port(vport); |
6093ae9a | 2070 | ovs_unlock(); |
ccb1352e | 2071 | |
2a94fe48 | 2072 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2073 | return 0; |
ccb1352e | 2074 | |
6093ae9a | 2075 | exit_unlock_free: |
8e4e1713 | 2076 | ovs_unlock(); |
6093ae9a | 2077 | kfree_skb(reply); |
ccb1352e JG |
2078 | return err; |
2079 | } | |
2080 | ||
2081 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2082 | { | |
2083 | struct nlattr **a = info->attrs; | |
2084 | struct ovs_header *ovs_header = info->userhdr; | |
2085 | struct sk_buff *reply; | |
2086 | struct vport *vport; | |
2087 | int err; | |
2088 | ||
6093ae9a JR |
2089 | reply = ovs_vport_cmd_alloc_info(); |
2090 | if (!reply) | |
2091 | return -ENOMEM; | |
2092 | ||
ccb1352e | 2093 | rcu_read_lock(); |
46df7b81 | 2094 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2095 | err = PTR_ERR(vport); |
2096 | if (IS_ERR(vport)) | |
6093ae9a JR |
2097 | goto exit_unlock_free; |
2098 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
2099 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2100 | BUG_ON(err < 0); | |
ccb1352e JG |
2101 | rcu_read_unlock(); |
2102 | ||
2103 | return genlmsg_reply(reply, info); | |
2104 | ||
6093ae9a | 2105 | exit_unlock_free: |
ccb1352e | 2106 | rcu_read_unlock(); |
6093ae9a | 2107 | kfree_skb(reply); |
ccb1352e JG |
2108 | return err; |
2109 | } | |
2110 | ||
2111 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2112 | { | |
2113 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2114 | struct datapath *dp; | |
15eac2a7 PS |
2115 | int bucket = cb->args[0], skip = cb->args[1]; |
2116 | int i, j = 0; | |
ccb1352e | 2117 | |
42ee19e2 | 2118 | rcu_read_lock(); |
cc3a5ae6 | 2119 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2120 | if (!dp) { |
2121 | rcu_read_unlock(); | |
ccb1352e | 2122 | return -ENODEV; |
42ee19e2 | 2123 | } |
15eac2a7 | 2124 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2125 | struct vport *vport; |
15eac2a7 PS |
2126 | |
2127 | j = 0; | |
b67bfe0d | 2128 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2129 | if (j >= skip && |
2130 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 2131 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2132 | cb->nlh->nlmsg_seq, |
2133 | NLM_F_MULTI, | |
2134 | OVS_VPORT_CMD_NEW) < 0) | |
2135 | goto out; | |
2136 | ||
2137 | j++; | |
2138 | } | |
2139 | skip = 0; | |
ccb1352e | 2140 | } |
15eac2a7 | 2141 | out: |
ccb1352e JG |
2142 | rcu_read_unlock(); |
2143 | ||
15eac2a7 PS |
2144 | cb->args[0] = i; |
2145 | cb->args[1] = j; | |
ccb1352e | 2146 | |
15eac2a7 | 2147 | return skb->len; |
ccb1352e JG |
2148 | } |
2149 | ||
0c200ef9 PS |
2150 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2151 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2152 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2153 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2154 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2155 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2156 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2157 | }; | |
2158 | ||
48e48a70 | 2159 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e JG |
2160 | { .cmd = OVS_VPORT_CMD_NEW, |
2161 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2162 | .policy = vport_policy, | |
2163 | .doit = ovs_vport_cmd_new | |
2164 | }, | |
2165 | { .cmd = OVS_VPORT_CMD_DEL, | |
2166 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2167 | .policy = vport_policy, | |
2168 | .doit = ovs_vport_cmd_del | |
2169 | }, | |
2170 | { .cmd = OVS_VPORT_CMD_GET, | |
2171 | .flags = 0, /* OK for unprivileged users. */ | |
2172 | .policy = vport_policy, | |
2173 | .doit = ovs_vport_cmd_get, | |
2174 | .dumpit = ovs_vport_cmd_dump | |
2175 | }, | |
2176 | { .cmd = OVS_VPORT_CMD_SET, | |
2177 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2178 | .policy = vport_policy, | |
2179 | .doit = ovs_vport_cmd_set, | |
2180 | }, | |
2181 | }; | |
2182 | ||
0c200ef9 PS |
2183 | struct genl_family dp_vport_genl_family = { |
2184 | .id = GENL_ID_GENERATE, | |
2185 | .hdrsize = sizeof(struct ovs_header), | |
2186 | .name = OVS_VPORT_FAMILY, | |
2187 | .version = OVS_VPORT_VERSION, | |
2188 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2189 | .netnsok = true, | |
2190 | .parallel_ops = true, | |
2191 | .ops = dp_vport_genl_ops, | |
2192 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2193 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2194 | .n_mcgrps = 1, | |
ccb1352e JG |
2195 | }; |
2196 | ||
0c200ef9 PS |
2197 | static struct genl_family * const dp_genl_families[] = { |
2198 | &dp_datapath_genl_family, | |
2199 | &dp_vport_genl_family, | |
2200 | &dp_flow_genl_family, | |
2201 | &dp_packet_genl_family, | |
ccb1352e JG |
2202 | }; |
2203 | ||
2204 | static void dp_unregister_genl(int n_families) | |
2205 | { | |
2206 | int i; | |
2207 | ||
2208 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2209 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2210 | } |
2211 | ||
2212 | static int dp_register_genl(void) | |
2213 | { | |
ccb1352e JG |
2214 | int err; |
2215 | int i; | |
2216 | ||
ccb1352e | 2217 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2218 | |
0c200ef9 | 2219 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2220 | if (err) |
2221 | goto error; | |
ccb1352e JG |
2222 | } |
2223 | ||
2224 | return 0; | |
2225 | ||
2226 | error: | |
0c200ef9 | 2227 | dp_unregister_genl(i); |
ccb1352e JG |
2228 | return err; |
2229 | } | |
2230 | ||
46df7b81 PS |
2231 | static int __net_init ovs_init_net(struct net *net) |
2232 | { | |
2233 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2234 | ||
2235 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2236 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
c2ac6673 | 2237 | ovs_ct_init(net); |
46df7b81 PS |
2238 | return 0; |
2239 | } | |
2240 | ||
7b4577a9 PS |
2241 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2242 | struct list_head *head) | |
46df7b81 | 2243 | { |
8e4e1713 | 2244 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2245 | struct datapath *dp; |
2246 | ||
2247 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2248 | int i; | |
2249 | ||
2250 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2251 | struct vport *vport; | |
2252 | ||
2253 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2254 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2255 | continue; | |
2256 | ||
be4ace6e | 2257 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2258 | list_add(&vport->detach_list, head); |
2259 | } | |
2260 | } | |
2261 | } | |
2262 | } | |
2263 | ||
2264 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2265 | { | |
2266 | struct datapath *dp, *dp_next; | |
2267 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2268 | struct vport *vport, *vport_next; | |
2269 | struct net *net; | |
2270 | LIST_HEAD(head); | |
46df7b81 | 2271 | |
c2ac6673 | 2272 | ovs_ct_exit(dnet); |
8e4e1713 | 2273 | ovs_lock(); |
46df7b81 PS |
2274 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2275 | __dp_destroy(dp); | |
7b4577a9 PS |
2276 | |
2277 | rtnl_lock(); | |
2278 | for_each_net(net) | |
2279 | list_vports_from_net(net, dnet, &head); | |
2280 | rtnl_unlock(); | |
2281 | ||
2282 | /* Detach all vports from given namespace. */ | |
2283 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2284 | list_del(&vport->detach_list); | |
2285 | ovs_dp_detach_port(vport); | |
2286 | } | |
2287 | ||
8e4e1713 PS |
2288 | ovs_unlock(); |
2289 | ||
2290 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2291 | } |
2292 | ||
2293 | static struct pernet_operations ovs_net_ops = { | |
2294 | .init = ovs_init_net, | |
2295 | .exit = ovs_exit_net, | |
2296 | .id = &ovs_net_id, | |
2297 | .size = sizeof(struct ovs_net), | |
2298 | }; | |
2299 | ||
ccb1352e JG |
2300 | static int __init dp_init(void) |
2301 | { | |
ccb1352e JG |
2302 | int err; |
2303 | ||
3523b29b | 2304 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2305 | |
2306 | pr_info("Open vSwitch switching datapath\n"); | |
2307 | ||
971427f3 | 2308 | err = action_fifos_init(); |
ccb1352e JG |
2309 | if (err) |
2310 | goto error; | |
2311 | ||
971427f3 AZ |
2312 | err = ovs_internal_dev_rtnl_link_register(); |
2313 | if (err) | |
2314 | goto error_action_fifos_exit; | |
2315 | ||
5b9e7e16 JP |
2316 | err = ovs_flow_init(); |
2317 | if (err) | |
2318 | goto error_unreg_rtnl_link; | |
2319 | ||
ccb1352e JG |
2320 | err = ovs_vport_init(); |
2321 | if (err) | |
2322 | goto error_flow_exit; | |
2323 | ||
46df7b81 | 2324 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2325 | if (err) |
2326 | goto error_vport_exit; | |
2327 | ||
46df7b81 PS |
2328 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2329 | if (err) | |
2330 | goto error_netns_exit; | |
2331 | ||
62b9c8d0 TG |
2332 | err = ovs_netdev_init(); |
2333 | if (err) | |
2334 | goto error_unreg_notifier; | |
2335 | ||
ccb1352e JG |
2336 | err = dp_register_genl(); |
2337 | if (err < 0) | |
62b9c8d0 | 2338 | goto error_unreg_netdev; |
ccb1352e | 2339 | |
ccb1352e JG |
2340 | return 0; |
2341 | ||
62b9c8d0 TG |
2342 | error_unreg_netdev: |
2343 | ovs_netdev_exit(); | |
ccb1352e JG |
2344 | error_unreg_notifier: |
2345 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2346 | error_netns_exit: |
2347 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2348 | error_vport_exit: |
2349 | ovs_vport_exit(); | |
2350 | error_flow_exit: | |
2351 | ovs_flow_exit(); | |
5b9e7e16 JP |
2352 | error_unreg_rtnl_link: |
2353 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2354 | error_action_fifos_exit: |
2355 | action_fifos_exit(); | |
ccb1352e JG |
2356 | error: |
2357 | return err; | |
2358 | } | |
2359 | ||
2360 | static void dp_cleanup(void) | |
2361 | { | |
ccb1352e | 2362 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2363 | ovs_netdev_exit(); |
ccb1352e | 2364 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2365 | unregister_pernet_device(&ovs_net_ops); |
2366 | rcu_barrier(); | |
ccb1352e JG |
2367 | ovs_vport_exit(); |
2368 | ovs_flow_exit(); | |
5b9e7e16 | 2369 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2370 | action_fifos_exit(); |
ccb1352e JG |
2371 | } |
2372 | ||
2373 | module_init(dp_init); | |
2374 | module_exit(dp_cleanup); | |
2375 | ||
2376 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2377 | MODULE_LICENSE("GPL"); |