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 *, |
f2a4d086 WT |
140 | const struct dp_upcall_info *, |
141 | uint32_t cutlen); | |
8055a89c | 142 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 143 | const struct sw_flow_key *, |
f2a4d086 WT |
144 | const struct dp_upcall_info *, |
145 | uint32_t cutlen); | |
ccb1352e | 146 | |
cc3a5ae6 AZ |
147 | /* Must be called with rcu_read_lock. */ |
148 | static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex) | |
ccb1352e | 149 | { |
cc3a5ae6 | 150 | struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex); |
ccb1352e | 151 | |
ccb1352e JG |
152 | if (dev) { |
153 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
154 | if (vport) | |
cc3a5ae6 | 155 | return vport->dp; |
ccb1352e | 156 | } |
cc3a5ae6 AZ |
157 | |
158 | return NULL; | |
159 | } | |
160 | ||
161 | /* The caller must hold either ovs_mutex or rcu_read_lock to keep the | |
162 | * returned dp pointer valid. | |
163 | */ | |
164 | static inline struct datapath *get_dp(struct net *net, int dp_ifindex) | |
165 | { | |
166 | struct datapath *dp; | |
167 | ||
168 | WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); | |
169 | rcu_read_lock(); | |
170 | dp = get_dp_rcu(net, dp_ifindex); | |
ccb1352e JG |
171 | rcu_read_unlock(); |
172 | ||
173 | return dp; | |
174 | } | |
175 | ||
8e4e1713 | 176 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 177 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 178 | { |
8e4e1713 | 179 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
c9db965c | 180 | return ovs_vport_name(vport); |
ccb1352e JG |
181 | } |
182 | ||
12eb18f7 | 183 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
184 | { |
185 | struct vport *local; | |
186 | int ifindex; | |
187 | ||
188 | rcu_read_lock(); | |
189 | ||
15eac2a7 | 190 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 191 | if (local) |
be4ace6e | 192 | ifindex = local->dev->ifindex; |
ccb1352e JG |
193 | else |
194 | ifindex = 0; | |
195 | ||
196 | rcu_read_unlock(); | |
197 | ||
198 | return ifindex; | |
199 | } | |
200 | ||
201 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
202 | { | |
203 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
204 | ||
9b996e54 | 205 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 206 | free_percpu(dp->stats_percpu); |
15eac2a7 | 207 | kfree(dp->ports); |
ccb1352e JG |
208 | kfree(dp); |
209 | } | |
210 | ||
15eac2a7 PS |
211 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
212 | u16 port_no) | |
213 | { | |
214 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
215 | } | |
216 | ||
bb6f9a70 | 217 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
218 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
219 | { | |
220 | struct vport *vport; | |
15eac2a7 PS |
221 | struct hlist_head *head; |
222 | ||
223 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 224 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
225 | if (vport->port_no == port_no) |
226 | return vport; | |
227 | } | |
228 | return NULL; | |
229 | } | |
230 | ||
8e4e1713 | 231 | /* Called with ovs_mutex. */ |
ccb1352e JG |
232 | static struct vport *new_vport(const struct vport_parms *parms) |
233 | { | |
234 | struct vport *vport; | |
235 | ||
236 | vport = ovs_vport_add(parms); | |
237 | if (!IS_ERR(vport)) { | |
238 | struct datapath *dp = parms->dp; | |
15eac2a7 | 239 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 240 | |
15eac2a7 | 241 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 242 | } |
ccb1352e JG |
243 | return vport; |
244 | } | |
245 | ||
ccb1352e JG |
246 | void ovs_dp_detach_port(struct vport *p) |
247 | { | |
8e4e1713 | 248 | ASSERT_OVSL(); |
ccb1352e JG |
249 | |
250 | /* First drop references to device. */ | |
15eac2a7 | 251 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
252 | |
253 | /* Then destroy it. */ | |
254 | ovs_vport_del(p); | |
255 | } | |
256 | ||
257 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 258 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 259 | { |
83c8df26 | 260 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
261 | struct datapath *dp = p->dp; |
262 | struct sw_flow *flow; | |
d98612b8 | 263 | struct sw_flow_actions *sf_acts; |
ccb1352e | 264 | struct dp_stats_percpu *stats; |
ccb1352e | 265 | u64 *stats_counter; |
1bd7116f | 266 | u32 n_mask_hit; |
ccb1352e | 267 | |
404f2f10 | 268 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 269 | |
ccb1352e | 270 | /* Look up flow. */ |
8c8b1b83 | 271 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit); |
ccb1352e JG |
272 | if (unlikely(!flow)) { |
273 | struct dp_upcall_info upcall; | |
8c8b1b83 | 274 | int error; |
ccb1352e | 275 | |
ccea7445 | 276 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 277 | upcall.cmd = OVS_PACKET_CMD_MISS; |
5cd667b0 | 278 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
7f8a436e | 279 | upcall.mru = OVS_CB(skb)->mru; |
f2a4d086 | 280 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
c5eba0b6 LR |
281 | if (unlikely(error)) |
282 | kfree_skb(skb); | |
283 | else | |
284 | consume_skb(skb); | |
ccb1352e JG |
285 | stats_counter = &stats->n_missed; |
286 | goto out; | |
287 | } | |
288 | ||
d98612b8 LJ |
289 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
290 | sf_acts = rcu_dereference(flow->sf_acts); | |
291 | ovs_execute_actions(dp, skb, sf_acts, key); | |
ccb1352e | 292 | |
e298e505 | 293 | stats_counter = &stats->n_hit; |
ccb1352e JG |
294 | |
295 | out: | |
296 | /* Update datapath statistics. */ | |
df9d9fdf | 297 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 298 | (*stats_counter)++; |
1bd7116f | 299 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 300 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
301 | } |
302 | ||
ccb1352e | 303 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 304 | const struct sw_flow_key *key, |
f2a4d086 WT |
305 | const struct dp_upcall_info *upcall_info, |
306 | uint32_t cutlen) | |
ccb1352e JG |
307 | { |
308 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
309 | int err; |
310 | ||
15e47304 | 311 | if (upcall_info->portid == 0) { |
ccb1352e JG |
312 | err = -ENOTCONN; |
313 | goto err; | |
314 | } | |
315 | ||
ccb1352e | 316 | if (!skb_is_gso(skb)) |
f2a4d086 | 317 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e | 318 | else |
f2a4d086 | 319 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
320 | if (err) |
321 | goto err; | |
322 | ||
323 | return 0; | |
324 | ||
325 | err: | |
404f2f10 | 326 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 327 | |
df9d9fdf | 328 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 329 | stats->n_lost++; |
df9d9fdf | 330 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
331 | |
332 | return err; | |
333 | } | |
334 | ||
8055a89c | 335 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 336 | const struct sw_flow_key *key, |
f2a4d086 WT |
337 | const struct dp_upcall_info *upcall_info, |
338 | uint32_t cutlen) | |
ccb1352e | 339 | { |
a1b5d0dd | 340 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
ccb1352e JG |
341 | struct sw_flow_key later_key; |
342 | struct sk_buff *segs, *nskb; | |
343 | int err; | |
344 | ||
9207f9d4 | 345 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET); |
09c5e605 | 346 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
347 | if (IS_ERR(segs)) |
348 | return PTR_ERR(segs); | |
330966e5 FW |
349 | if (segs == NULL) |
350 | return -EINVAL; | |
ccb1352e | 351 | |
e8eedb85 PS |
352 | if (gso_type & SKB_GSO_UDP) { |
353 | /* The initial flow key extracted by ovs_flow_key_extract() | |
354 | * in this case is for a first fragment, so we need to | |
355 | * properly mark later fragments. | |
356 | */ | |
357 | later_key = *key; | |
358 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
359 | } | |
360 | ||
ccb1352e JG |
361 | /* Queue all of the segments. */ |
362 | skb = segs; | |
363 | do { | |
e8eedb85 PS |
364 | if (gso_type & SKB_GSO_UDP && skb != segs) |
365 | key = &later_key; | |
366 | ||
f2a4d086 | 367 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
368 | if (err) |
369 | break; | |
370 | ||
ccb1352e JG |
371 | } while ((skb = skb->next)); |
372 | ||
373 | /* Free all of the segments. */ | |
374 | skb = segs; | |
375 | do { | |
376 | nskb = skb->next; | |
377 | if (err) | |
378 | kfree_skb(skb); | |
379 | else | |
380 | consume_skb(skb); | |
381 | } while ((skb = nskb)); | |
382 | return err; | |
383 | } | |
384 | ||
8f0aad6f | 385 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
bda56f14 | 386 | unsigned int hdrlen) |
c3ff8cfe TG |
387 | { |
388 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 389 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
b95e5928 WT |
390 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
391 | + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */ | |
c3ff8cfe TG |
392 | |
393 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
394 | if (upcall_info->userdata) |
395 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
396 | ||
397 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
398 | if (upcall_info->egress_tun_info) | |
399 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 400 | |
ccea7445 NM |
401 | /* OVS_PACKET_ATTR_ACTIONS */ |
402 | if (upcall_info->actions_len) | |
403 | size += nla_total_size(upcall_info->actions_len); | |
404 | ||
7f8a436e JS |
405 | /* OVS_PACKET_ATTR_MRU */ |
406 | if (upcall_info->mru) | |
407 | size += nla_total_size(sizeof(upcall_info->mru)); | |
408 | ||
c3ff8cfe TG |
409 | return size; |
410 | } | |
411 | ||
7f8a436e JS |
412 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
413 | { | |
414 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
415 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
416 | ||
417 | if (plen > 0) | |
418 | memset(skb_put(skb, plen), 0, plen); | |
419 | } | |
420 | } | |
421 | ||
8055a89c | 422 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 423 | const struct sw_flow_key *key, |
f2a4d086 WT |
424 | const struct dp_upcall_info *upcall_info, |
425 | uint32_t cutlen) | |
ccb1352e JG |
426 | { |
427 | struct ovs_header *upcall; | |
428 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 429 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 430 | struct nlattr *nla; |
795449d8 | 431 | size_t len; |
bda56f14 | 432 | unsigned int hlen; |
8055a89c TG |
433 | int err, dp_ifindex; |
434 | ||
435 | dp_ifindex = get_dpifindex(dp); | |
436 | if (!dp_ifindex) | |
437 | return -ENODEV; | |
ccb1352e | 438 | |
df8a39de | 439 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
440 | nskb = skb_clone(skb, GFP_ATOMIC); |
441 | if (!nskb) | |
442 | return -ENOMEM; | |
443 | ||
5968250c | 444 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 445 | if (!nskb) |
ccb1352e JG |
446 | return -ENOMEM; |
447 | ||
ccb1352e JG |
448 | skb = nskb; |
449 | } | |
450 | ||
451 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
452 | err = -EFBIG; | |
453 | goto out; | |
454 | } | |
455 | ||
bda56f14 TG |
456 | /* Complete checksum if needed */ |
457 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
458 | (err = skb_checksum_help(skb))) | |
459 | goto out; | |
460 | ||
461 | /* Older versions of OVS user space enforce alignment of the last | |
462 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
463 | * padding logic. Only perform zerocopy if padding is not required. | |
464 | */ | |
465 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
466 | hlen = skb_zerocopy_headlen(skb); | |
467 | else | |
468 | hlen = skb->len; | |
469 | ||
f2a4d086 | 470 | len = upcall_msg_size(upcall_info, hlen - cutlen); |
551ddc05 | 471 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
ccb1352e JG |
472 | if (!user_skb) { |
473 | err = -ENOMEM; | |
474 | goto out; | |
475 | } | |
476 | ||
477 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
478 | 0, upcall_info->cmd); | |
479 | upcall->dp_ifindex = dp_ifindex; | |
480 | ||
5b4237bb | 481 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
f53e3831 | 482 | BUG_ON(err); |
ccb1352e JG |
483 | |
484 | if (upcall_info->userdata) | |
4490108b BP |
485 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
486 | nla_len(upcall_info->userdata), | |
487 | nla_data(upcall_info->userdata)); | |
ccb1352e | 488 | |
8f0aad6f WZ |
489 | if (upcall_info->egress_tun_info) { |
490 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
fc4099f1 PS |
491 | err = ovs_nla_put_tunnel_info(user_skb, |
492 | upcall_info->egress_tun_info); | |
8f0aad6f WZ |
493 | BUG_ON(err); |
494 | nla_nest_end(user_skb, nla); | |
495 | } | |
496 | ||
ccea7445 NM |
497 | if (upcall_info->actions_len) { |
498 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS); | |
499 | err = ovs_nla_put_actions(upcall_info->actions, | |
500 | upcall_info->actions_len, | |
501 | user_skb); | |
502 | if (!err) | |
503 | nla_nest_end(user_skb, nla); | |
504 | else | |
505 | nla_nest_cancel(user_skb, nla); | |
506 | } | |
507 | ||
7f8a436e JS |
508 | /* Add OVS_PACKET_ATTR_MRU */ |
509 | if (upcall_info->mru) { | |
510 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
511 | upcall_info->mru)) { | |
512 | err = -ENOBUFS; | |
513 | goto out; | |
514 | } | |
515 | pad_packet(dp, user_skb); | |
516 | } | |
517 | ||
b95e5928 WT |
518 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
519 | if (cutlen > 0) { | |
520 | if (nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, | |
521 | skb->len)) { | |
522 | err = -ENOBUFS; | |
523 | goto out; | |
524 | } | |
525 | pad_packet(dp, user_skb); | |
526 | } | |
527 | ||
bda56f14 TG |
528 | /* Only reserve room for attribute header, packet data is added |
529 | * in skb_zerocopy() */ | |
530 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
531 | err = -ENOBUFS; | |
532 | goto out; | |
533 | } | |
f2a4d086 | 534 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
ccb1352e | 535 | |
f2a4d086 | 536 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
36d5fe6a ZK |
537 | if (err) |
538 | goto out; | |
ccb1352e | 539 | |
aea0bb4f | 540 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 541 | pad_packet(dp, user_skb); |
aea0bb4f | 542 | |
bda56f14 | 543 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 544 | |
bda56f14 | 545 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 546 | user_skb = NULL; |
ccb1352e | 547 | out: |
36d5fe6a ZK |
548 | if (err) |
549 | skb_tx_error(skb); | |
4ee45ea0 | 550 | kfree_skb(user_skb); |
ccb1352e JG |
551 | kfree_skb(nskb); |
552 | return err; | |
553 | } | |
554 | ||
ccb1352e JG |
555 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
556 | { | |
557 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 558 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
559 | struct nlattr **a = info->attrs; |
560 | struct sw_flow_actions *acts; | |
561 | struct sk_buff *packet; | |
562 | struct sw_flow *flow; | |
d98612b8 | 563 | struct sw_flow_actions *sf_acts; |
ccb1352e JG |
564 | struct datapath *dp; |
565 | struct ethhdr *eth; | |
83c8df26 | 566 | struct vport *input_vport; |
7f8a436e | 567 | u16 mru = 0; |
ccb1352e JG |
568 | int len; |
569 | int err; | |
1ba39804 | 570 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
571 | |
572 | err = -EINVAL; | |
573 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 574 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
575 | goto err; |
576 | ||
577 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
578 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
579 | err = -ENOMEM; | |
580 | if (!packet) | |
581 | goto err; | |
582 | skb_reserve(packet, NET_IP_ALIGN); | |
583 | ||
32686a9d | 584 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e JG |
585 | |
586 | skb_reset_mac_header(packet); | |
587 | eth = eth_hdr(packet); | |
588 | ||
589 | /* Normally, setting the skb 'protocol' field would be handled by a | |
590 | * call to eth_type_trans(), but it assumes there's a sending | |
591 | * device, which we may not have. */ | |
6713fc9b | 592 | if (eth_proto_is_802_3(eth->h_proto)) |
ccb1352e JG |
593 | packet->protocol = eth->h_proto; |
594 | else | |
595 | packet->protocol = htons(ETH_P_802_2); | |
596 | ||
7f8a436e JS |
597 | /* Set packet's mru */ |
598 | if (a[OVS_PACKET_ATTR_MRU]) { | |
599 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
600 | packet->ignore_df = 1; | |
601 | } | |
602 | OVS_CB(packet)->mru = mru; | |
603 | ||
ccb1352e | 604 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 605 | flow = ovs_flow_alloc(); |
ccb1352e JG |
606 | err = PTR_ERR(flow); |
607 | if (IS_ERR(flow)) | |
608 | goto err_kfree_skb; | |
609 | ||
c2ac6673 JS |
610 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
611 | packet, &flow->key, log); | |
ccb1352e JG |
612 | if (err) |
613 | goto err_flow_free; | |
614 | ||
7f8a436e | 615 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 616 | &flow->key, &acts, log); |
74f84a57 PS |
617 | if (err) |
618 | goto err_flow_free; | |
ccb1352e | 619 | |
f5796684 | 620 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 621 | packet->priority = flow->key.phy.priority; |
39c7caeb | 622 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
623 | |
624 | rcu_read_lock(); | |
7f8a436e | 625 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
626 | err = -ENODEV; |
627 | if (!dp) | |
628 | goto err_unlock; | |
629 | ||
83c8df26 PS |
630 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
631 | if (!input_vport) | |
632 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
633 | ||
634 | if (!input_vport) | |
635 | goto err_unlock; | |
636 | ||
7f8a436e | 637 | packet->dev = input_vport->dev; |
83c8df26 | 638 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 639 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 640 | |
ccb1352e | 641 | local_bh_disable(); |
d98612b8 | 642 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
643 | local_bh_enable(); |
644 | rcu_read_unlock(); | |
645 | ||
03f0d916 | 646 | ovs_flow_free(flow, false); |
ccb1352e JG |
647 | return err; |
648 | ||
649 | err_unlock: | |
650 | rcu_read_unlock(); | |
651 | err_flow_free: | |
03f0d916 | 652 | ovs_flow_free(flow, false); |
ccb1352e JG |
653 | err_kfree_skb: |
654 | kfree_skb(packet); | |
655 | err: | |
656 | return err; | |
657 | } | |
658 | ||
659 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 660 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
661 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
662 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 663 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 664 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
ccb1352e JG |
665 | }; |
666 | ||
4534de83 | 667 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e | 668 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
4a92602a | 669 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
670 | .policy = packet_policy, |
671 | .doit = ovs_packet_cmd_execute | |
672 | } | |
673 | }; | |
674 | ||
0c200ef9 PS |
675 | static struct genl_family dp_packet_genl_family = { |
676 | .id = GENL_ID_GENERATE, | |
677 | .hdrsize = sizeof(struct ovs_header), | |
678 | .name = OVS_PACKET_FAMILY, | |
679 | .version = OVS_PACKET_VERSION, | |
680 | .maxattr = OVS_PACKET_ATTR_MAX, | |
681 | .netnsok = true, | |
682 | .parallel_ops = true, | |
683 | .ops = dp_packet_genl_ops, | |
684 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
685 | }; | |
686 | ||
12eb18f7 | 687 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 688 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
689 | { |
690 | int i; | |
ccb1352e | 691 | |
1bd7116f AZ |
692 | memset(mega_stats, 0, sizeof(*mega_stats)); |
693 | ||
b637e498 | 694 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 695 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
696 | |
697 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 698 | |
ccb1352e JG |
699 | for_each_possible_cpu(i) { |
700 | const struct dp_stats_percpu *percpu_stats; | |
701 | struct dp_stats_percpu local_stats; | |
702 | unsigned int start; | |
703 | ||
704 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
705 | ||
706 | do { | |
57a7744e | 707 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 708 | local_stats = *percpu_stats; |
57a7744e | 709 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
710 | |
711 | stats->n_hit += local_stats.n_hit; | |
712 | stats->n_missed += local_stats.n_missed; | |
713 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 714 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
715 | } |
716 | } | |
717 | ||
74ed7ab9 JS |
718 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
719 | { | |
720 | return ovs_identifier_is_ufid(sfid) && | |
721 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
722 | } | |
723 | ||
724 | static bool should_fill_mask(uint32_t ufid_flags) | |
725 | { | |
726 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
727 | } | |
728 | ||
729 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 730 | { |
74ed7ab9 JS |
731 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
732 | } | |
733 | ||
734 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
735 | const struct sw_flow_id *sfid, | |
736 | uint32_t ufid_flags) | |
737 | { | |
738 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
739 | ||
740 | /* OVS_FLOW_ATTR_UFID */ | |
741 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
742 | len += nla_total_size(sfid->ufid_len); | |
743 | ||
744 | /* OVS_FLOW_ATTR_KEY */ | |
745 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
746 | len += nla_total_size(ovs_key_attr_size()); | |
747 | ||
748 | /* OVS_FLOW_ATTR_MASK */ | |
749 | if (should_fill_mask(ufid_flags)) | |
750 | len += nla_total_size(ovs_key_attr_size()); | |
751 | ||
752 | /* OVS_FLOW_ATTR_ACTIONS */ | |
753 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 754 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
755 | |
756 | return len | |
66c7a5ee | 757 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
c3ff8cfe | 758 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
66c7a5ee | 759 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
760 | } |
761 | ||
ca7105f2 JS |
762 | /* Called with ovs_mutex or RCU read lock. */ |
763 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
764 | struct sk_buff *skb) | |
765 | { | |
766 | struct ovs_flow_stats stats; | |
767 | __be16 tcp_flags; | |
768 | unsigned long used; | |
ccb1352e | 769 | |
e298e505 | 770 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 771 | |
028d6a67 | 772 | if (used && |
0238b720 ND |
773 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
774 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 775 | return -EMSGSIZE; |
ccb1352e | 776 | |
028d6a67 | 777 | if (stats.n_packets && |
66c7a5ee ND |
778 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
779 | sizeof(struct ovs_flow_stats), &stats, | |
780 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 781 | return -EMSGSIZE; |
ccb1352e | 782 | |
e298e505 PS |
783 | if ((u8)ntohs(tcp_flags) && |
784 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
785 | return -EMSGSIZE; |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
790 | /* Called with ovs_mutex or RCU read lock. */ | |
791 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
792 | struct sk_buff *skb, int skb_orig_len) | |
793 | { | |
794 | struct nlattr *start; | |
795 | int err; | |
ccb1352e JG |
796 | |
797 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
798 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
799 | * Netlink but individual action lists can be longer than | |
800 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
801 | * The userspace caller can always fetch the actions separately if it | |
802 | * really wants them. (Most userspace callers in fact don't care.) | |
803 | * | |
804 | * This can only fail for dump operations because the skb is always | |
805 | * properly sized for single flows. | |
806 | */ | |
74f84a57 PS |
807 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
808 | if (start) { | |
d57170b1 PS |
809 | const struct sw_flow_actions *sf_acts; |
810 | ||
663efa36 | 811 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
812 | err = ovs_nla_put_actions(sf_acts->actions, |
813 | sf_acts->actions_len, skb); | |
0e9796b4 | 814 | |
74f84a57 PS |
815 | if (!err) |
816 | nla_nest_end(skb, start); | |
817 | else { | |
818 | if (skb_orig_len) | |
ca7105f2 | 819 | return err; |
74f84a57 PS |
820 | |
821 | nla_nest_cancel(skb, start); | |
822 | } | |
ca7105f2 JS |
823 | } else if (skb_orig_len) { |
824 | return -EMSGSIZE; | |
825 | } | |
826 | ||
827 | return 0; | |
828 | } | |
829 | ||
830 | /* Called with ovs_mutex or RCU read lock. */ | |
831 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
832 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 833 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
834 | { |
835 | const int skb_orig_len = skb->len; | |
836 | struct ovs_header *ovs_header; | |
837 | int err; | |
838 | ||
839 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
840 | flags, cmd); | |
841 | if (!ovs_header) | |
842 | return -EMSGSIZE; | |
843 | ||
844 | ovs_header->dp_ifindex = dp_ifindex; | |
845 | ||
74ed7ab9 | 846 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
847 | if (err) |
848 | goto error; | |
849 | ||
74ed7ab9 JS |
850 | if (should_fill_key(&flow->id, ufid_flags)) { |
851 | err = ovs_nla_put_masked_key(flow, skb); | |
852 | if (err) | |
853 | goto error; | |
854 | } | |
855 | ||
856 | if (should_fill_mask(ufid_flags)) { | |
857 | err = ovs_nla_put_mask(flow, skb); | |
858 | if (err) | |
859 | goto error; | |
860 | } | |
ca7105f2 JS |
861 | |
862 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
863 | if (err) | |
864 | goto error; | |
865 | ||
74ed7ab9 JS |
866 | if (should_fill_actions(ufid_flags)) { |
867 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
868 | if (err) | |
869 | goto error; | |
870 | } | |
ccb1352e | 871 | |
053c095a JB |
872 | genlmsg_end(skb, ovs_header); |
873 | return 0; | |
ccb1352e | 874 | |
ccb1352e JG |
875 | error: |
876 | genlmsg_cancel(skb, ovs_header); | |
877 | return err; | |
878 | } | |
879 | ||
0e9796b4 JR |
880 | /* May not be called with RCU read lock. */ |
881 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 882 | const struct sw_flow_id *sfid, |
fb5d1e9e | 883 | struct genl_info *info, |
74ed7ab9 JS |
884 | bool always, |
885 | uint32_t ufid_flags) | |
ccb1352e | 886 | { |
fb5d1e9e | 887 | struct sk_buff *skb; |
74ed7ab9 | 888 | size_t len; |
ccb1352e | 889 | |
9b67aa4a | 890 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
891 | return NULL; |
892 | ||
74ed7ab9 | 893 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
551ddc05 | 894 | skb = genlmsg_new(len, GFP_KERNEL); |
fb5d1e9e JR |
895 | if (!skb) |
896 | return ERR_PTR(-ENOMEM); | |
897 | ||
898 | return skb; | |
ccb1352e JG |
899 | } |
900 | ||
0e9796b4 JR |
901 | /* Called with ovs_mutex. */ |
902 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
903 | int dp_ifindex, | |
904 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 905 | bool always, u32 ufid_flags) |
ccb1352e JG |
906 | { |
907 | struct sk_buff *skb; | |
908 | int retval; | |
909 | ||
74ed7ab9 JS |
910 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
911 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 912 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 913 | return skb; |
ccb1352e | 914 | |
0e9796b4 JR |
915 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
916 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 917 | cmd, ufid_flags); |
ccb1352e JG |
918 | BUG_ON(retval < 0); |
919 | return skb; | |
920 | } | |
921 | ||
37bdc87b | 922 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 923 | { |
7f8a436e | 924 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
925 | struct nlattr **a = info->attrs; |
926 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 927 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 928 | struct sw_flow_mask mask; |
ccb1352e JG |
929 | struct sk_buff *reply; |
930 | struct datapath *dp; | |
74ed7ab9 | 931 | struct sw_flow_key key; |
37bdc87b | 932 | struct sw_flow_actions *acts; |
03f0d916 | 933 | struct sw_flow_match match; |
74ed7ab9 | 934 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 935 | int error; |
05da5898 | 936 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 937 | |
893f139b | 938 | /* Must have key and actions. */ |
ccb1352e | 939 | error = -EINVAL; |
426cda5c | 940 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 941 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 942 | goto error; |
426cda5c JG |
943 | } |
944 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 945 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 946 | goto error; |
426cda5c | 947 | } |
03f0d916 | 948 | |
893f139b JR |
949 | /* Most of the time we need to allocate a new flow, do it before |
950 | * locking. | |
951 | */ | |
952 | new_flow = ovs_flow_alloc(); | |
953 | if (IS_ERR(new_flow)) { | |
954 | error = PTR_ERR(new_flow); | |
955 | goto error; | |
956 | } | |
957 | ||
958 | /* Extract key. */ | |
74ed7ab9 | 959 | ovs_match_init(&match, &key, &mask); |
c2ac6673 | 960 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 961 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 962 | if (error) |
893f139b | 963 | goto err_kfree_flow; |
ccb1352e | 964 | |
ae5f2fb1 | 965 | ovs_flow_mask_key(&new_flow->key, &key, true, &mask); |
74ed7ab9 JS |
966 | |
967 | /* Extract flow identifier. */ | |
968 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
969 | &key, log); | |
970 | if (error) | |
971 | goto err_kfree_flow; | |
74f84a57 | 972 | |
893f139b | 973 | /* Validate actions. */ |
7f8a436e JS |
974 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
975 | &new_flow->key, &acts, log); | |
37bdc87b | 976 | if (error) { |
05da5898 | 977 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 978 | goto err_kfree_flow; |
893f139b JR |
979 | } |
980 | ||
74ed7ab9 JS |
981 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
982 | ufid_flags); | |
893f139b JR |
983 | if (IS_ERR(reply)) { |
984 | error = PTR_ERR(reply); | |
985 | goto err_kfree_acts; | |
ccb1352e JG |
986 | } |
987 | ||
8e4e1713 | 988 | ovs_lock(); |
7f8a436e | 989 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
990 | if (unlikely(!dp)) { |
991 | error = -ENODEV; | |
8e4e1713 | 992 | goto err_unlock_ovs; |
893f139b | 993 | } |
74ed7ab9 | 994 | |
03f0d916 | 995 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
996 | if (ovs_identifier_is_ufid(&new_flow->id)) |
997 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
998 | if (!flow) | |
999 | flow = ovs_flow_tbl_lookup(&dp->table, &key); | |
893f139b JR |
1000 | if (likely(!flow)) { |
1001 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
1002 | |
1003 | /* Put flow in bucket. */ | |
893f139b JR |
1004 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
1005 | if (unlikely(error)) { | |
618ed0c8 | 1006 | acts = NULL; |
893f139b JR |
1007 | goto err_unlock_ovs; |
1008 | } | |
1009 | ||
1010 | if (unlikely(reply)) { | |
1011 | error = ovs_flow_cmd_fill_info(new_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 | 1017 | BUG_ON(error < 0); |
618ed0c8 | 1018 | } |
893f139b | 1019 | ovs_unlock(); |
ccb1352e | 1020 | } else { |
37bdc87b JR |
1021 | struct sw_flow_actions *old_acts; |
1022 | ||
ccb1352e JG |
1023 | /* Bail out if we're not allowed to modify an existing flow. |
1024 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1025 | * because Generic Netlink treats the latter as a dump | |
1026 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1027 | * gets fixed. | |
1028 | */ | |
893f139b JR |
1029 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1030 | | NLM_F_EXCL))) { | |
1031 | error = -EEXIST; | |
8e4e1713 | 1032 | goto err_unlock_ovs; |
893f139b | 1033 | } |
74ed7ab9 JS |
1034 | /* The flow identifier has to be the same for flow updates. |
1035 | * Look for any overlapping flow. | |
1036 | */ | |
1037 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1038 | if (ovs_identifier_is_key(&flow->id)) | |
1039 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1040 | &match); | |
1041 | else /* UFID matches but key is different */ | |
1042 | flow = NULL; | |
4a46b24e AW |
1043 | if (!flow) { |
1044 | error = -ENOENT; | |
1045 | goto err_unlock_ovs; | |
1046 | } | |
893f139b | 1047 | } |
37bdc87b JR |
1048 | /* Update actions. */ |
1049 | old_acts = ovsl_dereference(flow->sf_acts); | |
1050 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1051 | |
893f139b JR |
1052 | if (unlikely(reply)) { |
1053 | error = ovs_flow_cmd_fill_info(flow, | |
1054 | ovs_header->dp_ifindex, | |
1055 | reply, info->snd_portid, | |
1056 | info->snd_seq, 0, | |
74ed7ab9 JS |
1057 | OVS_FLOW_CMD_NEW, |
1058 | ufid_flags); | |
893f139b JR |
1059 | BUG_ON(error < 0); |
1060 | } | |
1061 | ovs_unlock(); | |
37bdc87b | 1062 | |
34ae932a | 1063 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1064 | ovs_flow_free(new_flow, false); |
37bdc87b | 1065 | } |
893f139b JR |
1066 | |
1067 | if (reply) | |
1068 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1069 | return 0; |
1070 | ||
37bdc87b JR |
1071 | err_unlock_ovs: |
1072 | ovs_unlock(); | |
893f139b JR |
1073 | kfree_skb(reply); |
1074 | err_kfree_acts: | |
34ae932a | 1075 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1076 | err_kfree_flow: |
1077 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1078 | error: |
1079 | return error; | |
1080 | } | |
ccb1352e | 1081 | |
2fdb957d | 1082 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
7f8a436e JS |
1083 | static struct sw_flow_actions *get_flow_actions(struct net *net, |
1084 | const struct nlattr *a, | |
6b205b2c | 1085 | const struct sw_flow_key *key, |
05da5898 JR |
1086 | const struct sw_flow_mask *mask, |
1087 | bool log) | |
6b205b2c JG |
1088 | { |
1089 | struct sw_flow_actions *acts; | |
1090 | struct sw_flow_key masked_key; | |
1091 | int error; | |
1092 | ||
ae5f2fb1 | 1093 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1094 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1095 | if (error) { |
05da5898 JR |
1096 | OVS_NLERR(log, |
1097 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1098 | return ERR_PTR(error); |
1099 | } | |
1100 | ||
1101 | return acts; | |
1102 | } | |
1103 | ||
37bdc87b JR |
1104 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1105 | { | |
7f8a436e | 1106 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1107 | struct nlattr **a = info->attrs; |
1108 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1109 | struct sw_flow_key key; |
37bdc87b JR |
1110 | struct sw_flow *flow; |
1111 | struct sw_flow_mask mask; | |
1112 | struct sk_buff *reply = NULL; | |
1113 | struct datapath *dp; | |
893f139b | 1114 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1115 | struct sw_flow_match match; |
74ed7ab9 JS |
1116 | struct sw_flow_id sfid; |
1117 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
6f15cdbf | 1118 | int error = 0; |
05da5898 | 1119 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1120 | bool ufid_present; |
37bdc87b | 1121 | |
74ed7ab9 | 1122 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
6f15cdbf SG |
1123 | if (a[OVS_FLOW_ATTR_KEY]) { |
1124 | ovs_match_init(&match, &key, &mask); | |
1125 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], | |
1126 | a[OVS_FLOW_ATTR_MASK], log); | |
1127 | } else if (!ufid_present) { | |
1128 | OVS_NLERR(log, | |
1129 | "Flow set message rejected, Key attribute missing."); | |
1130 | error = -EINVAL; | |
1131 | } | |
37bdc87b JR |
1132 | if (error) |
1133 | goto error; | |
1134 | ||
1135 | /* Validate actions. */ | |
1136 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
6f15cdbf SG |
1137 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1138 | OVS_NLERR(log, | |
1139 | "Flow key attribute not present in set flow."); | |
1140 | error = -EINVAL; | |
1141 | goto error; | |
1142 | } | |
1143 | ||
7f8a436e JS |
1144 | acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], &key, |
1145 | &mask, log); | |
6b205b2c JG |
1146 | if (IS_ERR(acts)) { |
1147 | error = PTR_ERR(acts); | |
37bdc87b | 1148 | goto error; |
893f139b | 1149 | } |
893f139b | 1150 | |
2fdb957d | 1151 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1152 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1153 | ufid_flags); | |
893f139b JR |
1154 | if (IS_ERR(reply)) { |
1155 | error = PTR_ERR(reply); | |
1156 | goto err_kfree_acts; | |
be52c9e9 | 1157 | } |
37bdc87b | 1158 | } |
0e9796b4 | 1159 | |
37bdc87b | 1160 | ovs_lock(); |
7f8a436e | 1161 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1162 | if (unlikely(!dp)) { |
1163 | error = -ENODEV; | |
37bdc87b | 1164 | goto err_unlock_ovs; |
893f139b | 1165 | } |
37bdc87b | 1166 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1167 | if (ufid_present) |
1168 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1169 | else | |
1170 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1171 | if (unlikely(!flow)) { |
1172 | error = -ENOENT; | |
37bdc87b | 1173 | goto err_unlock_ovs; |
893f139b | 1174 | } |
4a46b24e | 1175 | |
37bdc87b | 1176 | /* Update actions, if present. */ |
893f139b | 1177 | if (likely(acts)) { |
37bdc87b JR |
1178 | old_acts = ovsl_dereference(flow->sf_acts); |
1179 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1180 | |
1181 | if (unlikely(reply)) { | |
1182 | error = ovs_flow_cmd_fill_info(flow, | |
1183 | ovs_header->dp_ifindex, | |
1184 | reply, info->snd_portid, | |
1185 | info->snd_seq, 0, | |
74ed7ab9 JS |
1186 | OVS_FLOW_CMD_NEW, |
1187 | ufid_flags); | |
893f139b JR |
1188 | BUG_ON(error < 0); |
1189 | } | |
1190 | } else { | |
1191 | /* Could not alloc without acts before locking. */ | |
1192 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
74ed7ab9 JS |
1193 | info, OVS_FLOW_CMD_NEW, false, |
1194 | ufid_flags); | |
1195 | ||
b5ffe634 | 1196 | if (IS_ERR(reply)) { |
893f139b JR |
1197 | error = PTR_ERR(reply); |
1198 | goto err_unlock_ovs; | |
1199 | } | |
ccb1352e | 1200 | } |
37bdc87b | 1201 | |
37bdc87b JR |
1202 | /* Clear stats. */ |
1203 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1204 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1205 | ovs_unlock(); |
ccb1352e | 1206 | |
893f139b JR |
1207 | if (reply) |
1208 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1209 | if (old_acts) | |
34ae932a | 1210 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1211 | |
ccb1352e JG |
1212 | return 0; |
1213 | ||
8e4e1713 PS |
1214 | err_unlock_ovs: |
1215 | ovs_unlock(); | |
893f139b JR |
1216 | kfree_skb(reply); |
1217 | err_kfree_acts: | |
34ae932a | 1218 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1219 | error: |
1220 | return error; | |
1221 | } | |
1222 | ||
1223 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1224 | { | |
1225 | struct nlattr **a = info->attrs; | |
1226 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1227 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1228 | struct sw_flow_key key; |
1229 | struct sk_buff *reply; | |
1230 | struct sw_flow *flow; | |
1231 | struct datapath *dp; | |
03f0d916 | 1232 | struct sw_flow_match match; |
74ed7ab9 JS |
1233 | struct sw_flow_id ufid; |
1234 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1235 | int err = 0; | |
05da5898 | 1236 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1237 | bool ufid_present; |
ccb1352e | 1238 | |
74ed7ab9 JS |
1239 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1240 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1241 | ovs_match_init(&match, &key, NULL); | |
c2ac6673 | 1242 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1243 | log); |
1244 | } else if (!ufid_present) { | |
05da5898 JR |
1245 | OVS_NLERR(log, |
1246 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1247 | err = -EINVAL; |
03f0d916 | 1248 | } |
ccb1352e JG |
1249 | if (err) |
1250 | return err; | |
1251 | ||
8e4e1713 | 1252 | ovs_lock(); |
46df7b81 | 1253 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1254 | if (!dp) { |
1255 | err = -ENODEV; | |
1256 | goto unlock; | |
1257 | } | |
ccb1352e | 1258 | |
74ed7ab9 JS |
1259 | if (ufid_present) |
1260 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1261 | else | |
1262 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1263 | if (!flow) { |
8e4e1713 PS |
1264 | err = -ENOENT; |
1265 | goto unlock; | |
1266 | } | |
ccb1352e | 1267 | |
0e9796b4 | 1268 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
74ed7ab9 | 1269 | OVS_FLOW_CMD_NEW, true, ufid_flags); |
8e4e1713 PS |
1270 | if (IS_ERR(reply)) { |
1271 | err = PTR_ERR(reply); | |
1272 | goto unlock; | |
1273 | } | |
ccb1352e | 1274 | |
8e4e1713 | 1275 | ovs_unlock(); |
ccb1352e | 1276 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1277 | unlock: |
1278 | ovs_unlock(); | |
1279 | return err; | |
ccb1352e JG |
1280 | } |
1281 | ||
1282 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1283 | { | |
1284 | struct nlattr **a = info->attrs; | |
1285 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1286 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1287 | struct sw_flow_key key; |
1288 | struct sk_buff *reply; | |
74ed7ab9 | 1289 | struct sw_flow *flow = NULL; |
ccb1352e | 1290 | struct datapath *dp; |
03f0d916 | 1291 | struct sw_flow_match match; |
74ed7ab9 JS |
1292 | struct sw_flow_id ufid; |
1293 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1294 | int err; |
05da5898 | 1295 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1296 | bool ufid_present; |
ccb1352e | 1297 | |
74ed7ab9 JS |
1298 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1299 | if (a[OVS_FLOW_ATTR_KEY]) { | |
aed06778 | 1300 | ovs_match_init(&match, &key, NULL); |
c2ac6673 JS |
1301 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1302 | NULL, log); | |
aed06778 JR |
1303 | if (unlikely(err)) |
1304 | return err; | |
1305 | } | |
1306 | ||
8e4e1713 | 1307 | ovs_lock(); |
46df7b81 | 1308 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1309 | if (unlikely(!dp)) { |
8e4e1713 PS |
1310 | err = -ENODEV; |
1311 | goto unlock; | |
1312 | } | |
46df7b81 | 1313 | |
74ed7ab9 | 1314 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1315 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1316 | goto unlock; |
1317 | } | |
03f0d916 | 1318 | |
74ed7ab9 JS |
1319 | if (ufid_present) |
1320 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1321 | else | |
1322 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1323 | if (unlikely(!flow)) { |
8e4e1713 PS |
1324 | err = -ENOENT; |
1325 | goto unlock; | |
1326 | } | |
ccb1352e | 1327 | |
b637e498 | 1328 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1329 | ovs_unlock(); |
ccb1352e | 1330 | |
aed06778 | 1331 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1332 | &flow->id, info, false, ufid_flags); |
aed06778 JR |
1333 | if (likely(reply)) { |
1334 | if (likely(!IS_ERR(reply))) { | |
1335 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1336 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1337 | reply, info->snd_portid, | |
1338 | info->snd_seq, 0, | |
74ed7ab9 JS |
1339 | OVS_FLOW_CMD_DEL, |
1340 | ufid_flags); | |
aed06778 JR |
1341 | rcu_read_unlock(); |
1342 | BUG_ON(err < 0); | |
1343 | ||
1344 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1345 | } else { | |
1346 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1347 | } | |
fb5d1e9e | 1348 | } |
ccb1352e | 1349 | |
aed06778 | 1350 | ovs_flow_free(flow, true); |
ccb1352e | 1351 | return 0; |
8e4e1713 PS |
1352 | unlock: |
1353 | ovs_unlock(); | |
1354 | return err; | |
ccb1352e JG |
1355 | } |
1356 | ||
1357 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1358 | { | |
74ed7ab9 | 1359 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1360 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1361 | struct table_instance *ti; |
ccb1352e | 1362 | struct datapath *dp; |
74ed7ab9 JS |
1363 | u32 ufid_flags; |
1364 | int err; | |
1365 | ||
1366 | err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a, | |
1367 | OVS_FLOW_ATTR_MAX, flow_policy); | |
1368 | if (err) | |
1369 | return err; | |
1370 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1371 | |
d57170b1 | 1372 | rcu_read_lock(); |
cc3a5ae6 | 1373 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1374 | if (!dp) { |
d57170b1 | 1375 | rcu_read_unlock(); |
ccb1352e | 1376 | return -ENODEV; |
8e4e1713 | 1377 | } |
ccb1352e | 1378 | |
b637e498 | 1379 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1380 | for (;;) { |
1381 | struct sw_flow *flow; | |
1382 | u32 bucket, obj; | |
1383 | ||
1384 | bucket = cb->args[0]; | |
1385 | obj = cb->args[1]; | |
b637e498 | 1386 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1387 | if (!flow) |
1388 | break; | |
1389 | ||
0e9796b4 | 1390 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1391 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1392 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
74ed7ab9 | 1393 | OVS_FLOW_CMD_NEW, ufid_flags) < 0) |
ccb1352e JG |
1394 | break; |
1395 | ||
1396 | cb->args[0] = bucket; | |
1397 | cb->args[1] = obj; | |
1398 | } | |
d57170b1 | 1399 | rcu_read_unlock(); |
ccb1352e JG |
1400 | return skb->len; |
1401 | } | |
1402 | ||
0c200ef9 PS |
1403 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1404 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1405 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1406 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1407 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1408 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1409 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1410 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1411 | }; |
1412 | ||
48e48a70 | 1413 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e | 1414 | { .cmd = OVS_FLOW_CMD_NEW, |
4a92602a | 1415 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e | 1416 | .policy = flow_policy, |
37bdc87b | 1417 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1418 | }, |
1419 | { .cmd = OVS_FLOW_CMD_DEL, | |
4a92602a | 1420 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1421 | .policy = flow_policy, |
1422 | .doit = ovs_flow_cmd_del | |
1423 | }, | |
1424 | { .cmd = OVS_FLOW_CMD_GET, | |
1425 | .flags = 0, /* OK for unprivileged users. */ | |
1426 | .policy = flow_policy, | |
1427 | .doit = ovs_flow_cmd_get, | |
1428 | .dumpit = ovs_flow_cmd_dump | |
1429 | }, | |
1430 | { .cmd = OVS_FLOW_CMD_SET, | |
4a92602a | 1431 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e | 1432 | .policy = flow_policy, |
37bdc87b | 1433 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1434 | }, |
1435 | }; | |
1436 | ||
0c200ef9 | 1437 | static struct genl_family dp_flow_genl_family = { |
ccb1352e JG |
1438 | .id = GENL_ID_GENERATE, |
1439 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1440 | .name = OVS_FLOW_FAMILY, |
1441 | .version = OVS_FLOW_VERSION, | |
1442 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3a4e0d6a PS |
1443 | .netnsok = true, |
1444 | .parallel_ops = true, | |
0c200ef9 PS |
1445 | .ops = dp_flow_genl_ops, |
1446 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1447 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1448 | .n_mcgrps = 1, | |
ccb1352e JG |
1449 | }; |
1450 | ||
c3ff8cfe TG |
1451 | static size_t ovs_dp_cmd_msg_size(void) |
1452 | { | |
1453 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1454 | ||
1455 | msgsize += nla_total_size(IFNAMSIZ); | |
66c7a5ee ND |
1456 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1457 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
45fb9c35 | 1458 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1459 | |
1460 | return msgsize; | |
1461 | } | |
1462 | ||
8ec609d8 | 1463 | /* Called with ovs_mutex. */ |
ccb1352e | 1464 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1465 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1466 | { |
1467 | struct ovs_header *ovs_header; | |
1468 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1469 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1470 | int err; |
1471 | ||
15e47304 | 1472 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1473 | flags, cmd); |
1474 | if (!ovs_header) | |
1475 | goto error; | |
1476 | ||
1477 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1478 | ||
ccb1352e | 1479 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1480 | if (err) |
1481 | goto nla_put_failure; | |
1482 | ||
1bd7116f | 1483 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
66c7a5ee ND |
1484 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1485 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1bd7116f AZ |
1486 | goto nla_put_failure; |
1487 | ||
66c7a5ee ND |
1488 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1489 | sizeof(struct ovs_dp_megaflow_stats), | |
1490 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
028d6a67 | 1491 | goto nla_put_failure; |
ccb1352e | 1492 | |
43d4be9c TG |
1493 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1494 | goto nla_put_failure; | |
1495 | ||
053c095a JB |
1496 | genlmsg_end(skb, ovs_header); |
1497 | return 0; | |
ccb1352e JG |
1498 | |
1499 | nla_put_failure: | |
1500 | genlmsg_cancel(skb, ovs_header); | |
1501 | error: | |
1502 | return -EMSGSIZE; | |
1503 | } | |
1504 | ||
263ea090 | 1505 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
ccb1352e | 1506 | { |
551ddc05 | 1507 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1508 | } |
1509 | ||
bb6f9a70 | 1510 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1511 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1512 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1513 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1514 | { | |
1515 | struct datapath *dp; | |
1516 | ||
1517 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1518 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1519 | else { |
1520 | struct vport *vport; | |
1521 | ||
46df7b81 | 1522 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1523 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1524 | } |
1525 | return dp ? dp : ERR_PTR(-ENODEV); | |
1526 | } | |
1527 | ||
44da5ae5 TG |
1528 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1529 | { | |
1530 | struct datapath *dp; | |
1531 | ||
1532 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1533 | if (IS_ERR(dp)) |
44da5ae5 TG |
1534 | return; |
1535 | ||
1536 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1537 | dp->user_features = 0; | |
1538 | } | |
1539 | ||
12eb18f7 | 1540 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
43d4be9c TG |
1541 | { |
1542 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1543 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1544 | } | |
1545 | ||
ccb1352e JG |
1546 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1547 | { | |
1548 | struct nlattr **a = info->attrs; | |
1549 | struct vport_parms parms; | |
1550 | struct sk_buff *reply; | |
1551 | struct datapath *dp; | |
1552 | struct vport *vport; | |
46df7b81 | 1553 | struct ovs_net *ovs_net; |
15eac2a7 | 1554 | int err, i; |
ccb1352e JG |
1555 | |
1556 | err = -EINVAL; | |
1557 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1558 | goto err; | |
1559 | ||
263ea090 | 1560 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1561 | if (!reply) |
1562 | return -ENOMEM; | |
ccb1352e JG |
1563 | |
1564 | err = -ENOMEM; | |
1565 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1566 | if (dp == NULL) | |
6093ae9a | 1567 | goto err_free_reply; |
46df7b81 | 1568 | |
efd7ef1c | 1569 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1570 | |
1571 | /* Allocate table. */ | |
b637e498 PS |
1572 | err = ovs_flow_tbl_init(&dp->table); |
1573 | if (err) | |
ccb1352e JG |
1574 | goto err_free_dp; |
1575 | ||
1c213bd2 | 1576 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1577 | if (!dp->stats_percpu) { |
1578 | err = -ENOMEM; | |
1579 | goto err_destroy_table; | |
1580 | } | |
1581 | ||
15eac2a7 | 1582 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
e6445719 | 1583 | GFP_KERNEL); |
15eac2a7 PS |
1584 | if (!dp->ports) { |
1585 | err = -ENOMEM; | |
1586 | goto err_destroy_percpu; | |
1587 | } | |
1588 | ||
1589 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1590 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1591 | ||
ccb1352e JG |
1592 | /* Set up our datapath device. */ |
1593 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1594 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1595 | parms.options = NULL; | |
1596 | parms.dp = dp; | |
1597 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1598 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1599 | |
43d4be9c TG |
1600 | ovs_dp_change(dp, a); |
1601 | ||
6093ae9a JR |
1602 | /* So far only local changes have been made, now need the lock. */ |
1603 | ovs_lock(); | |
1604 | ||
ccb1352e JG |
1605 | vport = new_vport(&parms); |
1606 | if (IS_ERR(vport)) { | |
1607 | err = PTR_ERR(vport); | |
1608 | if (err == -EBUSY) | |
1609 | err = -EEXIST; | |
1610 | ||
44da5ae5 TG |
1611 | if (err == -EEXIST) { |
1612 | /* An outdated user space instance that does not understand | |
1613 | * the concept of user_features has attempted to create a new | |
1614 | * datapath and is likely to reuse it. Drop all user features. | |
1615 | */ | |
1616 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1617 | ovs_dp_reset_user_features(skb, info); | |
1618 | } | |
1619 | ||
15eac2a7 | 1620 | goto err_destroy_ports_array; |
ccb1352e JG |
1621 | } |
1622 | ||
6093ae9a JR |
1623 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1624 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1625 | BUG_ON(err < 0); | |
ccb1352e | 1626 | |
46df7b81 | 1627 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1628 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1629 | |
1630 | ovs_unlock(); | |
ccb1352e | 1631 | |
2a94fe48 | 1632 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1633 | return 0; |
1634 | ||
15eac2a7 | 1635 | err_destroy_ports_array: |
6093ae9a | 1636 | ovs_unlock(); |
15eac2a7 | 1637 | kfree(dp->ports); |
ccb1352e JG |
1638 | err_destroy_percpu: |
1639 | free_percpu(dp->stats_percpu); | |
1640 | err_destroy_table: | |
9b996e54 | 1641 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e JG |
1642 | err_free_dp: |
1643 | kfree(dp); | |
6093ae9a JR |
1644 | err_free_reply: |
1645 | kfree_skb(reply); | |
ccb1352e JG |
1646 | err: |
1647 | return err; | |
1648 | } | |
1649 | ||
8e4e1713 | 1650 | /* Called with ovs_mutex. */ |
46df7b81 | 1651 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1652 | { |
15eac2a7 | 1653 | int i; |
ccb1352e | 1654 | |
15eac2a7 PS |
1655 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1656 | struct vport *vport; | |
b67bfe0d | 1657 | struct hlist_node *n; |
15eac2a7 | 1658 | |
b67bfe0d | 1659 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1660 | if (vport->port_no != OVSP_LOCAL) |
1661 | ovs_dp_detach_port(vport); | |
1662 | } | |
ccb1352e | 1663 | |
59a35d60 | 1664 | list_del_rcu(&dp->list_node); |
ccb1352e | 1665 | |
8e4e1713 | 1666 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1667 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1668 | */ |
8e4e1713 | 1669 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1670 | |
e80857cc | 1671 | /* RCU destroy the flow table */ |
ccb1352e | 1672 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1673 | } |
1674 | ||
1675 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1676 | { | |
1677 | struct sk_buff *reply; | |
1678 | struct datapath *dp; | |
1679 | int err; | |
1680 | ||
263ea090 | 1681 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1682 | if (!reply) |
1683 | return -ENOMEM; | |
1684 | ||
8e4e1713 | 1685 | ovs_lock(); |
46df7b81 PS |
1686 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1687 | err = PTR_ERR(dp); | |
1688 | if (IS_ERR(dp)) | |
6093ae9a | 1689 | goto err_unlock_free; |
46df7b81 | 1690 | |
6093ae9a JR |
1691 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1692 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1693 | BUG_ON(err < 0); | |
46df7b81 PS |
1694 | |
1695 | __dp_destroy(dp); | |
8e4e1713 | 1696 | ovs_unlock(); |
ccb1352e | 1697 | |
2a94fe48 | 1698 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1699 | |
1700 | return 0; | |
6093ae9a JR |
1701 | |
1702 | err_unlock_free: | |
8e4e1713 | 1703 | ovs_unlock(); |
6093ae9a | 1704 | kfree_skb(reply); |
8e4e1713 | 1705 | return err; |
ccb1352e JG |
1706 | } |
1707 | ||
1708 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1709 | { | |
1710 | struct sk_buff *reply; | |
1711 | struct datapath *dp; | |
1712 | int err; | |
1713 | ||
263ea090 | 1714 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1715 | if (!reply) |
1716 | return -ENOMEM; | |
1717 | ||
8e4e1713 | 1718 | ovs_lock(); |
46df7b81 | 1719 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1720 | err = PTR_ERR(dp); |
ccb1352e | 1721 | if (IS_ERR(dp)) |
6093ae9a | 1722 | goto err_unlock_free; |
ccb1352e | 1723 | |
43d4be9c TG |
1724 | ovs_dp_change(dp, info->attrs); |
1725 | ||
6093ae9a JR |
1726 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1727 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1728 | BUG_ON(err < 0); | |
ccb1352e | 1729 | |
8e4e1713 | 1730 | ovs_unlock(); |
2a94fe48 | 1731 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1732 | |
1733 | return 0; | |
6093ae9a JR |
1734 | |
1735 | err_unlock_free: | |
8e4e1713 | 1736 | ovs_unlock(); |
6093ae9a | 1737 | kfree_skb(reply); |
8e4e1713 | 1738 | return err; |
ccb1352e JG |
1739 | } |
1740 | ||
1741 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1742 | { | |
1743 | struct sk_buff *reply; | |
1744 | struct datapath *dp; | |
8e4e1713 | 1745 | int err; |
ccb1352e | 1746 | |
263ea090 | 1747 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1748 | if (!reply) |
1749 | return -ENOMEM; | |
1750 | ||
8ec609d8 | 1751 | ovs_lock(); |
46df7b81 | 1752 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1753 | if (IS_ERR(dp)) { |
1754 | err = PTR_ERR(dp); | |
6093ae9a | 1755 | goto err_unlock_free; |
8e4e1713 | 1756 | } |
6093ae9a JR |
1757 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1758 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1759 | BUG_ON(err < 0); | |
8ec609d8 | 1760 | ovs_unlock(); |
ccb1352e JG |
1761 | |
1762 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1763 | |
6093ae9a | 1764 | err_unlock_free: |
8ec609d8 | 1765 | ovs_unlock(); |
6093ae9a | 1766 | kfree_skb(reply); |
8e4e1713 | 1767 | return err; |
ccb1352e JG |
1768 | } |
1769 | ||
1770 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1771 | { | |
46df7b81 | 1772 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1773 | struct datapath *dp; |
1774 | int skip = cb->args[0]; | |
1775 | int i = 0; | |
1776 | ||
8ec609d8 PS |
1777 | ovs_lock(); |
1778 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1779 | if (i >= skip && |
15e47304 | 1780 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1781 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1782 | OVS_DP_CMD_NEW) < 0) | |
1783 | break; | |
1784 | i++; | |
1785 | } | |
8ec609d8 | 1786 | ovs_unlock(); |
ccb1352e JG |
1787 | |
1788 | cb->args[0] = i; | |
1789 | ||
1790 | return skb->len; | |
1791 | } | |
1792 | ||
0c200ef9 PS |
1793 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1794 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1795 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1796 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1797 | }; | |
1798 | ||
48e48a70 | 1799 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e | 1800 | { .cmd = OVS_DP_CMD_NEW, |
4a92602a | 1801 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1802 | .policy = datapath_policy, |
1803 | .doit = ovs_dp_cmd_new | |
1804 | }, | |
1805 | { .cmd = OVS_DP_CMD_DEL, | |
4a92602a | 1806 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1807 | .policy = datapath_policy, |
1808 | .doit = ovs_dp_cmd_del | |
1809 | }, | |
1810 | { .cmd = OVS_DP_CMD_GET, | |
1811 | .flags = 0, /* OK for unprivileged users. */ | |
1812 | .policy = datapath_policy, | |
1813 | .doit = ovs_dp_cmd_get, | |
1814 | .dumpit = ovs_dp_cmd_dump | |
1815 | }, | |
1816 | { .cmd = OVS_DP_CMD_SET, | |
4a92602a | 1817 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1818 | .policy = datapath_policy, |
1819 | .doit = ovs_dp_cmd_set, | |
1820 | }, | |
1821 | }; | |
1822 | ||
0c200ef9 | 1823 | static struct genl_family dp_datapath_genl_family = { |
ccb1352e JG |
1824 | .id = GENL_ID_GENERATE, |
1825 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1826 | .name = OVS_DATAPATH_FAMILY, |
1827 | .version = OVS_DATAPATH_VERSION, | |
1828 | .maxattr = OVS_DP_ATTR_MAX, | |
3a4e0d6a PS |
1829 | .netnsok = true, |
1830 | .parallel_ops = true, | |
0c200ef9 PS |
1831 | .ops = dp_datapath_genl_ops, |
1832 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1833 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1834 | .n_mcgrps = 1, | |
ccb1352e JG |
1835 | }; |
1836 | ||
8e4e1713 | 1837 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1838 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1839 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1840 | { |
1841 | struct ovs_header *ovs_header; | |
1842 | struct ovs_vport_stats vport_stats; | |
1843 | int err; | |
1844 | ||
15e47304 | 1845 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1846 | flags, cmd); |
1847 | if (!ovs_header) | |
1848 | return -EMSGSIZE; | |
1849 | ||
1850 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1851 | ||
028d6a67 DM |
1852 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1853 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 1854 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
c9db965c | 1855 | ovs_vport_name(vport))) |
028d6a67 | 1856 | goto nla_put_failure; |
ccb1352e JG |
1857 | |
1858 | ovs_vport_get_stats(vport, &vport_stats); | |
66c7a5ee ND |
1859 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1860 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1861 | OVS_VPORT_ATTR_PAD)) | |
028d6a67 | 1862 | goto nla_put_failure; |
ccb1352e | 1863 | |
5cd667b0 AW |
1864 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1865 | goto nla_put_failure; | |
1866 | ||
ccb1352e JG |
1867 | err = ovs_vport_get_options(vport, skb); |
1868 | if (err == -EMSGSIZE) | |
1869 | goto error; | |
1870 | ||
053c095a JB |
1871 | genlmsg_end(skb, ovs_header); |
1872 | return 0; | |
ccb1352e JG |
1873 | |
1874 | nla_put_failure: | |
1875 | err = -EMSGSIZE; | |
1876 | error: | |
1877 | genlmsg_cancel(skb, ovs_header); | |
1878 | return err; | |
1879 | } | |
1880 | ||
6093ae9a JR |
1881 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1882 | { | |
1883 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1884 | } | |
1885 | ||
1886 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
15e47304 | 1887 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1888 | u32 seq, u8 cmd) |
1889 | { | |
1890 | struct sk_buff *skb; | |
1891 | int retval; | |
1892 | ||
1893 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1894 | if (!skb) | |
1895 | return ERR_PTR(-ENOMEM); | |
1896 | ||
15e47304 | 1897 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1898 | BUG_ON(retval < 0); |
1899 | ||
ccb1352e JG |
1900 | return skb; |
1901 | } | |
1902 | ||
8e4e1713 | 1903 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 1904 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 1905 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1906 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1907 | { | |
1908 | struct datapath *dp; | |
1909 | struct vport *vport; | |
1910 | ||
1911 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1912 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1913 | if (!vport) |
1914 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1915 | if (ovs_header->dp_ifindex && |
1916 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1917 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1918 | return vport; |
1919 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1920 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1921 | ||
1922 | if (port_no >= DP_MAX_PORTS) | |
1923 | return ERR_PTR(-EFBIG); | |
1924 | ||
46df7b81 | 1925 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1926 | if (!dp) |
1927 | return ERR_PTR(-ENODEV); | |
1928 | ||
8e4e1713 | 1929 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1930 | if (!vport) |
14408dba | 1931 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1932 | return vport; |
1933 | } else | |
1934 | return ERR_PTR(-EINVAL); | |
1935 | } | |
1936 | ||
3a927bc7 PA |
1937 | /* Called with ovs_mutex */ |
1938 | static void update_headroom(struct datapath *dp) | |
1939 | { | |
1940 | unsigned dev_headroom, max_headroom = 0; | |
1941 | struct net_device *dev; | |
1942 | struct vport *vport; | |
1943 | int i; | |
1944 | ||
1945 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1946 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
1947 | dev = vport->dev; | |
1948 | dev_headroom = netdev_get_fwd_headroom(dev); | |
1949 | if (dev_headroom > max_headroom) | |
1950 | max_headroom = dev_headroom; | |
1951 | } | |
1952 | } | |
1953 | ||
1954 | dp->max_headroom = max_headroom; | |
1955 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1956 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) | |
1957 | netdev_set_rx_headroom(vport->dev, max_headroom); | |
1958 | } | |
1959 | ||
ccb1352e JG |
1960 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1961 | { | |
1962 | struct nlattr **a = info->attrs; | |
1963 | struct ovs_header *ovs_header = info->userhdr; | |
1964 | struct vport_parms parms; | |
1965 | struct sk_buff *reply; | |
1966 | struct vport *vport; | |
1967 | struct datapath *dp; | |
1968 | u32 port_no; | |
1969 | int err; | |
1970 | ||
ccb1352e JG |
1971 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1972 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a JR |
1973 | return -EINVAL; |
1974 | ||
1975 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1976 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1977 | if (port_no >= DP_MAX_PORTS) | |
1978 | return -EFBIG; | |
1979 | ||
1980 | reply = ovs_vport_cmd_alloc_info(); | |
1981 | if (!reply) | |
1982 | return -ENOMEM; | |
ccb1352e | 1983 | |
8e4e1713 | 1984 | ovs_lock(); |
62b9c8d0 | 1985 | restart: |
46df7b81 | 1986 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1987 | err = -ENODEV; |
1988 | if (!dp) | |
6093ae9a | 1989 | goto exit_unlock_free; |
ccb1352e | 1990 | |
6093ae9a | 1991 | if (port_no) { |
8e4e1713 | 1992 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1993 | err = -EBUSY; |
1994 | if (vport) | |
6093ae9a | 1995 | goto exit_unlock_free; |
ccb1352e JG |
1996 | } else { |
1997 | for (port_no = 1; ; port_no++) { | |
1998 | if (port_no >= DP_MAX_PORTS) { | |
1999 | err = -EFBIG; | |
6093ae9a | 2000 | goto exit_unlock_free; |
ccb1352e | 2001 | } |
8e4e1713 | 2002 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2003 | if (!vport) |
2004 | break; | |
2005 | } | |
2006 | } | |
2007 | ||
2008 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2009 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2010 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2011 | parms.dp = dp; | |
2012 | parms.port_no = port_no; | |
5cd667b0 | 2013 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
2014 | |
2015 | vport = new_vport(&parms); | |
2016 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
2017 | if (IS_ERR(vport)) { |
2018 | if (err == -EAGAIN) | |
2019 | goto restart; | |
6093ae9a | 2020 | goto exit_unlock_free; |
62b9c8d0 | 2021 | } |
ccb1352e | 2022 | |
6093ae9a JR |
2023 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2024 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
3a927bc7 PA |
2025 | |
2026 | if (netdev_get_fwd_headroom(vport->dev) > dp->max_headroom) | |
2027 | update_headroom(dp); | |
2028 | else | |
2029 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2030 | ||
6093ae9a JR |
2031 | BUG_ON(err < 0); |
2032 | ovs_unlock(); | |
ed661185 | 2033 | |
2a94fe48 | 2034 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2035 | return 0; |
ccb1352e | 2036 | |
6093ae9a | 2037 | exit_unlock_free: |
8e4e1713 | 2038 | ovs_unlock(); |
6093ae9a | 2039 | kfree_skb(reply); |
ccb1352e JG |
2040 | return err; |
2041 | } | |
2042 | ||
2043 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2044 | { | |
2045 | struct nlattr **a = info->attrs; | |
2046 | struct sk_buff *reply; | |
2047 | struct vport *vport; | |
2048 | int err; | |
2049 | ||
6093ae9a JR |
2050 | reply = ovs_vport_cmd_alloc_info(); |
2051 | if (!reply) | |
2052 | return -ENOMEM; | |
2053 | ||
8e4e1713 | 2054 | ovs_lock(); |
46df7b81 | 2055 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2056 | err = PTR_ERR(vport); |
2057 | if (IS_ERR(vport)) | |
6093ae9a | 2058 | goto exit_unlock_free; |
ccb1352e | 2059 | |
ccb1352e | 2060 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2061 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2062 | err = -EINVAL; |
6093ae9a | 2063 | goto exit_unlock_free; |
a9341512 JG |
2064 | } |
2065 | ||
f44f3408 | 2066 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2067 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2068 | if (err) |
6093ae9a | 2069 | goto exit_unlock_free; |
f44f3408 | 2070 | } |
a9341512 | 2071 | |
5cd667b0 AW |
2072 | |
2073 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2074 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2075 | ||
2076 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2077 | if (err) | |
2078 | goto exit_unlock_free; | |
2079 | } | |
ccb1352e | 2080 | |
a9341512 JG |
2081 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2082 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2083 | BUG_ON(err < 0); | |
ccb1352e | 2084 | |
8e4e1713 | 2085 | ovs_unlock(); |
2a94fe48 | 2086 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2087 | return 0; |
ccb1352e | 2088 | |
6093ae9a | 2089 | exit_unlock_free: |
8e4e1713 | 2090 | ovs_unlock(); |
6093ae9a | 2091 | kfree_skb(reply); |
ccb1352e JG |
2092 | return err; |
2093 | } | |
2094 | ||
2095 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2096 | { | |
3a927bc7 | 2097 | bool must_update_headroom = false; |
ccb1352e JG |
2098 | struct nlattr **a = info->attrs; |
2099 | struct sk_buff *reply; | |
3a927bc7 | 2100 | struct datapath *dp; |
ccb1352e JG |
2101 | struct vport *vport; |
2102 | int err; | |
2103 | ||
6093ae9a JR |
2104 | reply = ovs_vport_cmd_alloc_info(); |
2105 | if (!reply) | |
2106 | return -ENOMEM; | |
2107 | ||
8e4e1713 | 2108 | ovs_lock(); |
46df7b81 | 2109 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2110 | err = PTR_ERR(vport); |
2111 | if (IS_ERR(vport)) | |
6093ae9a | 2112 | goto exit_unlock_free; |
ccb1352e JG |
2113 | |
2114 | if (vport->port_no == OVSP_LOCAL) { | |
2115 | err = -EINVAL; | |
6093ae9a | 2116 | goto exit_unlock_free; |
ccb1352e JG |
2117 | } |
2118 | ||
6093ae9a JR |
2119 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2120 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
2121 | BUG_ON(err < 0); | |
3a927bc7 PA |
2122 | |
2123 | /* the vport deletion may trigger dp headroom update */ | |
2124 | dp = vport->dp; | |
2125 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
2126 | must_update_headroom = true; | |
2127 | netdev_reset_rx_headroom(vport->dev); | |
ccb1352e | 2128 | ovs_dp_detach_port(vport); |
3a927bc7 PA |
2129 | |
2130 | if (must_update_headroom) | |
2131 | update_headroom(dp); | |
6093ae9a | 2132 | ovs_unlock(); |
ccb1352e | 2133 | |
2a94fe48 | 2134 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2135 | return 0; |
ccb1352e | 2136 | |
6093ae9a | 2137 | exit_unlock_free: |
8e4e1713 | 2138 | ovs_unlock(); |
6093ae9a | 2139 | kfree_skb(reply); |
ccb1352e JG |
2140 | return err; |
2141 | } | |
2142 | ||
2143 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2144 | { | |
2145 | struct nlattr **a = info->attrs; | |
2146 | struct ovs_header *ovs_header = info->userhdr; | |
2147 | struct sk_buff *reply; | |
2148 | struct vport *vport; | |
2149 | int err; | |
2150 | ||
6093ae9a JR |
2151 | reply = ovs_vport_cmd_alloc_info(); |
2152 | if (!reply) | |
2153 | return -ENOMEM; | |
2154 | ||
ccb1352e | 2155 | rcu_read_lock(); |
46df7b81 | 2156 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2157 | err = PTR_ERR(vport); |
2158 | if (IS_ERR(vport)) | |
6093ae9a JR |
2159 | goto exit_unlock_free; |
2160 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
2161 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2162 | BUG_ON(err < 0); | |
ccb1352e JG |
2163 | rcu_read_unlock(); |
2164 | ||
2165 | return genlmsg_reply(reply, info); | |
2166 | ||
6093ae9a | 2167 | exit_unlock_free: |
ccb1352e | 2168 | rcu_read_unlock(); |
6093ae9a | 2169 | kfree_skb(reply); |
ccb1352e JG |
2170 | return err; |
2171 | } | |
2172 | ||
2173 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2174 | { | |
2175 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2176 | struct datapath *dp; | |
15eac2a7 PS |
2177 | int bucket = cb->args[0], skip = cb->args[1]; |
2178 | int i, j = 0; | |
ccb1352e | 2179 | |
42ee19e2 | 2180 | rcu_read_lock(); |
cc3a5ae6 | 2181 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2182 | if (!dp) { |
2183 | rcu_read_unlock(); | |
ccb1352e | 2184 | return -ENODEV; |
42ee19e2 | 2185 | } |
15eac2a7 | 2186 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2187 | struct vport *vport; |
15eac2a7 PS |
2188 | |
2189 | j = 0; | |
b67bfe0d | 2190 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2191 | if (j >= skip && |
2192 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 2193 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2194 | cb->nlh->nlmsg_seq, |
2195 | NLM_F_MULTI, | |
2196 | OVS_VPORT_CMD_NEW) < 0) | |
2197 | goto out; | |
2198 | ||
2199 | j++; | |
2200 | } | |
2201 | skip = 0; | |
ccb1352e | 2202 | } |
15eac2a7 | 2203 | out: |
ccb1352e JG |
2204 | rcu_read_unlock(); |
2205 | ||
15eac2a7 PS |
2206 | cb->args[0] = i; |
2207 | cb->args[1] = j; | |
ccb1352e | 2208 | |
15eac2a7 | 2209 | return skb->len; |
ccb1352e JG |
2210 | } |
2211 | ||
0c200ef9 PS |
2212 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2213 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2214 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2215 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2216 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2217 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2218 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2219 | }; | |
2220 | ||
48e48a70 | 2221 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e | 2222 | { .cmd = OVS_VPORT_CMD_NEW, |
4a92602a | 2223 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2224 | .policy = vport_policy, |
2225 | .doit = ovs_vport_cmd_new | |
2226 | }, | |
2227 | { .cmd = OVS_VPORT_CMD_DEL, | |
4a92602a | 2228 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2229 | .policy = vport_policy, |
2230 | .doit = ovs_vport_cmd_del | |
2231 | }, | |
2232 | { .cmd = OVS_VPORT_CMD_GET, | |
2233 | .flags = 0, /* OK for unprivileged users. */ | |
2234 | .policy = vport_policy, | |
2235 | .doit = ovs_vport_cmd_get, | |
2236 | .dumpit = ovs_vport_cmd_dump | |
2237 | }, | |
2238 | { .cmd = OVS_VPORT_CMD_SET, | |
4a92602a | 2239 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2240 | .policy = vport_policy, |
2241 | .doit = ovs_vport_cmd_set, | |
2242 | }, | |
2243 | }; | |
2244 | ||
0c200ef9 PS |
2245 | struct genl_family dp_vport_genl_family = { |
2246 | .id = GENL_ID_GENERATE, | |
2247 | .hdrsize = sizeof(struct ovs_header), | |
2248 | .name = OVS_VPORT_FAMILY, | |
2249 | .version = OVS_VPORT_VERSION, | |
2250 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2251 | .netnsok = true, | |
2252 | .parallel_ops = true, | |
2253 | .ops = dp_vport_genl_ops, | |
2254 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2255 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2256 | .n_mcgrps = 1, | |
ccb1352e JG |
2257 | }; |
2258 | ||
0c200ef9 PS |
2259 | static struct genl_family * const dp_genl_families[] = { |
2260 | &dp_datapath_genl_family, | |
2261 | &dp_vport_genl_family, | |
2262 | &dp_flow_genl_family, | |
2263 | &dp_packet_genl_family, | |
ccb1352e JG |
2264 | }; |
2265 | ||
2266 | static void dp_unregister_genl(int n_families) | |
2267 | { | |
2268 | int i; | |
2269 | ||
2270 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2271 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2272 | } |
2273 | ||
2274 | static int dp_register_genl(void) | |
2275 | { | |
ccb1352e JG |
2276 | int err; |
2277 | int i; | |
2278 | ||
ccb1352e | 2279 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2280 | |
0c200ef9 | 2281 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2282 | if (err) |
2283 | goto error; | |
ccb1352e JG |
2284 | } |
2285 | ||
2286 | return 0; | |
2287 | ||
2288 | error: | |
0c200ef9 | 2289 | dp_unregister_genl(i); |
ccb1352e JG |
2290 | return err; |
2291 | } | |
2292 | ||
46df7b81 PS |
2293 | static int __net_init ovs_init_net(struct net *net) |
2294 | { | |
2295 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2296 | ||
2297 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2298 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
c2ac6673 | 2299 | ovs_ct_init(net); |
46df7b81 PS |
2300 | return 0; |
2301 | } | |
2302 | ||
7b4577a9 PS |
2303 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2304 | struct list_head *head) | |
46df7b81 | 2305 | { |
8e4e1713 | 2306 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2307 | struct datapath *dp; |
2308 | ||
2309 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2310 | int i; | |
2311 | ||
2312 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2313 | struct vport *vport; | |
2314 | ||
2315 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2316 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2317 | continue; | |
2318 | ||
be4ace6e | 2319 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2320 | list_add(&vport->detach_list, head); |
2321 | } | |
2322 | } | |
2323 | } | |
2324 | } | |
2325 | ||
2326 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2327 | { | |
2328 | struct datapath *dp, *dp_next; | |
2329 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2330 | struct vport *vport, *vport_next; | |
2331 | struct net *net; | |
2332 | LIST_HEAD(head); | |
46df7b81 | 2333 | |
c2ac6673 | 2334 | ovs_ct_exit(dnet); |
8e4e1713 | 2335 | ovs_lock(); |
46df7b81 PS |
2336 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2337 | __dp_destroy(dp); | |
7b4577a9 PS |
2338 | |
2339 | rtnl_lock(); | |
2340 | for_each_net(net) | |
2341 | list_vports_from_net(net, dnet, &head); | |
2342 | rtnl_unlock(); | |
2343 | ||
2344 | /* Detach all vports from given namespace. */ | |
2345 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2346 | list_del(&vport->detach_list); | |
2347 | ovs_dp_detach_port(vport); | |
2348 | } | |
2349 | ||
8e4e1713 PS |
2350 | ovs_unlock(); |
2351 | ||
2352 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2353 | } |
2354 | ||
2355 | static struct pernet_operations ovs_net_ops = { | |
2356 | .init = ovs_init_net, | |
2357 | .exit = ovs_exit_net, | |
2358 | .id = &ovs_net_id, | |
2359 | .size = sizeof(struct ovs_net), | |
2360 | }; | |
2361 | ||
ccb1352e JG |
2362 | static int __init dp_init(void) |
2363 | { | |
ccb1352e JG |
2364 | int err; |
2365 | ||
3523b29b | 2366 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2367 | |
2368 | pr_info("Open vSwitch switching datapath\n"); | |
2369 | ||
971427f3 | 2370 | err = action_fifos_init(); |
ccb1352e JG |
2371 | if (err) |
2372 | goto error; | |
2373 | ||
971427f3 AZ |
2374 | err = ovs_internal_dev_rtnl_link_register(); |
2375 | if (err) | |
2376 | goto error_action_fifos_exit; | |
2377 | ||
5b9e7e16 JP |
2378 | err = ovs_flow_init(); |
2379 | if (err) | |
2380 | goto error_unreg_rtnl_link; | |
2381 | ||
ccb1352e JG |
2382 | err = ovs_vport_init(); |
2383 | if (err) | |
2384 | goto error_flow_exit; | |
2385 | ||
46df7b81 | 2386 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2387 | if (err) |
2388 | goto error_vport_exit; | |
2389 | ||
46df7b81 PS |
2390 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2391 | if (err) | |
2392 | goto error_netns_exit; | |
2393 | ||
62b9c8d0 TG |
2394 | err = ovs_netdev_init(); |
2395 | if (err) | |
2396 | goto error_unreg_notifier; | |
2397 | ||
ccb1352e JG |
2398 | err = dp_register_genl(); |
2399 | if (err < 0) | |
62b9c8d0 | 2400 | goto error_unreg_netdev; |
ccb1352e | 2401 | |
ccb1352e JG |
2402 | return 0; |
2403 | ||
62b9c8d0 TG |
2404 | error_unreg_netdev: |
2405 | ovs_netdev_exit(); | |
ccb1352e JG |
2406 | error_unreg_notifier: |
2407 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2408 | error_netns_exit: |
2409 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2410 | error_vport_exit: |
2411 | ovs_vport_exit(); | |
2412 | error_flow_exit: | |
2413 | ovs_flow_exit(); | |
5b9e7e16 JP |
2414 | error_unreg_rtnl_link: |
2415 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2416 | error_action_fifos_exit: |
2417 | action_fifos_exit(); | |
ccb1352e JG |
2418 | error: |
2419 | return err; | |
2420 | } | |
2421 | ||
2422 | static void dp_cleanup(void) | |
2423 | { | |
ccb1352e | 2424 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2425 | ovs_netdev_exit(); |
ccb1352e | 2426 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2427 | unregister_pernet_device(&ovs_net_ops); |
2428 | rcu_barrier(); | |
ccb1352e JG |
2429 | ovs_vport_exit(); |
2430 | ovs_flow_exit(); | |
5b9e7e16 | 2431 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2432 | action_fifos_exit(); |
ccb1352e JG |
2433 | } |
2434 | ||
2435 | module_init(dp_init); | |
2436 | module_exit(dp_cleanup); | |
2437 | ||
2438 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2439 | MODULE_LICENSE("GPL"); |