Commit | Line | Data |
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ccb1352e | 1 | /* |
ad552007 | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
ccb1352e JG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
20 | ||
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/if_arp.h> | |
24 | #include <linux/if_vlan.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
27 | #include <linux/jhash.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
31 | #include <linux/genetlink.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/kthread.h> | |
34 | #include <linux/mutex.h> | |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
ccb1352e JG |
39 | #include <linux/ethtool.h> |
40 | #include <linux/wait.h> | |
ccb1352e JG |
41 | #include <asm/div64.h> |
42 | #include <linux/highmem.h> | |
43 | #include <linux/netfilter_bridge.h> | |
44 | #include <linux/netfilter_ipv4.h> | |
45 | #include <linux/inetdevice.h> | |
46 | #include <linux/list.h> | |
47 | #include <linux/openvswitch.h> | |
48 | #include <linux/rculist.h> | |
49 | #include <linux/dmi.h> | |
ccb1352e | 50 | #include <net/genetlink.h> |
46df7b81 PS |
51 | #include <net/net_namespace.h> |
52 | #include <net/netns/generic.h> | |
ccb1352e JG |
53 | |
54 | #include "datapath.h" | |
55 | #include "flow.h" | |
e80857cc | 56 | #include "flow_table.h" |
e6445719 | 57 | #include "flow_netlink.h" |
ccb1352e | 58 | #include "vport-internal_dev.h" |
cff63a52 | 59 | #include "vport-netdev.h" |
ccb1352e | 60 | |
8e4e1713 | 61 | int ovs_net_id __read_mostly; |
9ba559d9 | 62 | EXPORT_SYMBOL_GPL(ovs_net_id); |
8e4e1713 | 63 | |
0c200ef9 PS |
64 | static struct genl_family dp_packet_genl_family; |
65 | static struct genl_family dp_flow_genl_family; | |
66 | static struct genl_family dp_datapath_genl_family; | |
67 | ||
74ed7ab9 JS |
68 | static const struct nla_policy flow_policy[]; |
69 | ||
48e48a70 | 70 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
71 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
72 | }; |
73 | ||
48e48a70 | 74 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
75 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
76 | }; |
77 | ||
48e48a70 | 78 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
79 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
80 | }; |
81 | ||
fb5d1e9e JR |
82 | /* Check if need to build a reply message. |
83 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
84 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
85 | unsigned int group) | |
fb5d1e9e JR |
86 | { |
87 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
f8403a2e | 88 | genl_has_listeners(family, genl_info_net(info), group); |
fb5d1e9e JR |
89 | } |
90 | ||
68eb5503 | 91 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 92 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 93 | { |
92c14d9b | 94 | genl_notify(family, skb, info, 0, GFP_KERNEL); |
ed661185 TG |
95 | } |
96 | ||
ccb1352e JG |
97 | /** |
98 | * DOC: Locking: | |
99 | * | |
8e4e1713 PS |
100 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
101 | * operations on vports, etc.), Writes to other state (flow table | |
102 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
103 | * by ovs_lock. | |
ccb1352e JG |
104 | * |
105 | * Reads are protected by RCU. | |
106 | * | |
107 | * There are a few special cases (mostly stats) that have their own | |
108 | * synchronization but they nest under all of above and don't interact with | |
109 | * each other. | |
8e4e1713 PS |
110 | * |
111 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
112 | */ |
113 | ||
8e4e1713 PS |
114 | static DEFINE_MUTEX(ovs_mutex); |
115 | ||
116 | void ovs_lock(void) | |
117 | { | |
118 | mutex_lock(&ovs_mutex); | |
119 | } | |
120 | ||
121 | void ovs_unlock(void) | |
122 | { | |
123 | mutex_unlock(&ovs_mutex); | |
124 | } | |
125 | ||
126 | #ifdef CONFIG_LOCKDEP | |
127 | int lockdep_ovsl_is_held(void) | |
128 | { | |
129 | if (debug_locks) | |
130 | return lockdep_is_held(&ovs_mutex); | |
131 | else | |
132 | return 1; | |
133 | } | |
9ba559d9 | 134 | EXPORT_SYMBOL_GPL(lockdep_ovsl_is_held); |
8e4e1713 PS |
135 | #endif |
136 | ||
ccb1352e | 137 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 138 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 139 | const struct sw_flow_key *, |
ccb1352e | 140 | const struct dp_upcall_info *); |
8055a89c | 141 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 142 | const struct sw_flow_key *, |
ccb1352e JG |
143 | const struct dp_upcall_info *); |
144 | ||
cc3a5ae6 AZ |
145 | /* Must be called with rcu_read_lock. */ |
146 | static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex) | |
ccb1352e | 147 | { |
cc3a5ae6 | 148 | struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex); |
ccb1352e | 149 | |
ccb1352e JG |
150 | if (dev) { |
151 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
152 | if (vport) | |
cc3a5ae6 | 153 | return vport->dp; |
ccb1352e | 154 | } |
cc3a5ae6 AZ |
155 | |
156 | return NULL; | |
157 | } | |
158 | ||
159 | /* The caller must hold either ovs_mutex or rcu_read_lock to keep the | |
160 | * returned dp pointer valid. | |
161 | */ | |
162 | static inline struct datapath *get_dp(struct net *net, int dp_ifindex) | |
163 | { | |
164 | struct datapath *dp; | |
165 | ||
166 | WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); | |
167 | rcu_read_lock(); | |
168 | dp = get_dp_rcu(net, dp_ifindex); | |
ccb1352e JG |
169 | rcu_read_unlock(); |
170 | ||
171 | return dp; | |
172 | } | |
173 | ||
8e4e1713 | 174 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 175 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 176 | { |
8e4e1713 | 177 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
c9db965c | 178 | return ovs_vport_name(vport); |
ccb1352e JG |
179 | } |
180 | ||
12eb18f7 | 181 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
182 | { |
183 | struct vport *local; | |
184 | int ifindex; | |
185 | ||
186 | rcu_read_lock(); | |
187 | ||
15eac2a7 | 188 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 189 | if (local) |
be4ace6e | 190 | ifindex = local->dev->ifindex; |
ccb1352e JG |
191 | else |
192 | ifindex = 0; | |
193 | ||
194 | rcu_read_unlock(); | |
195 | ||
196 | return ifindex; | |
197 | } | |
198 | ||
199 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
200 | { | |
201 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
202 | ||
9b996e54 | 203 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 204 | free_percpu(dp->stats_percpu); |
15eac2a7 | 205 | kfree(dp->ports); |
ccb1352e JG |
206 | kfree(dp); |
207 | } | |
208 | ||
15eac2a7 PS |
209 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
210 | u16 port_no) | |
211 | { | |
212 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
213 | } | |
214 | ||
bb6f9a70 | 215 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
216 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
217 | { | |
218 | struct vport *vport; | |
15eac2a7 PS |
219 | struct hlist_head *head; |
220 | ||
221 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 222 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
223 | if (vport->port_no == port_no) |
224 | return vport; | |
225 | } | |
226 | return NULL; | |
227 | } | |
228 | ||
8e4e1713 | 229 | /* Called with ovs_mutex. */ |
ccb1352e JG |
230 | static struct vport *new_vport(const struct vport_parms *parms) |
231 | { | |
232 | struct vport *vport; | |
233 | ||
234 | vport = ovs_vport_add(parms); | |
235 | if (!IS_ERR(vport)) { | |
236 | struct datapath *dp = parms->dp; | |
15eac2a7 | 237 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 238 | |
15eac2a7 | 239 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 240 | } |
ccb1352e JG |
241 | return vport; |
242 | } | |
243 | ||
ccb1352e JG |
244 | void ovs_dp_detach_port(struct vport *p) |
245 | { | |
8e4e1713 | 246 | ASSERT_OVSL(); |
ccb1352e JG |
247 | |
248 | /* First drop references to device. */ | |
15eac2a7 | 249 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
250 | |
251 | /* Then destroy it. */ | |
252 | ovs_vport_del(p); | |
253 | } | |
254 | ||
255 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 256 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 257 | { |
83c8df26 | 258 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
259 | struct datapath *dp = p->dp; |
260 | struct sw_flow *flow; | |
d98612b8 | 261 | struct sw_flow_actions *sf_acts; |
ccb1352e | 262 | struct dp_stats_percpu *stats; |
ccb1352e | 263 | u64 *stats_counter; |
1bd7116f | 264 | u32 n_mask_hit; |
ccb1352e | 265 | |
404f2f10 | 266 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 267 | |
ccb1352e | 268 | /* Look up flow. */ |
8c8b1b83 | 269 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit); |
ccb1352e JG |
270 | if (unlikely(!flow)) { |
271 | struct dp_upcall_info upcall; | |
8c8b1b83 | 272 | int error; |
ccb1352e | 273 | |
ccea7445 | 274 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 275 | upcall.cmd = OVS_PACKET_CMD_MISS; |
5cd667b0 | 276 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
7f8a436e | 277 | upcall.mru = OVS_CB(skb)->mru; |
e8eedb85 | 278 | error = ovs_dp_upcall(dp, skb, key, &upcall); |
c5eba0b6 LR |
279 | if (unlikely(error)) |
280 | kfree_skb(skb); | |
281 | else | |
282 | consume_skb(skb); | |
ccb1352e JG |
283 | stats_counter = &stats->n_missed; |
284 | goto out; | |
285 | } | |
286 | ||
d98612b8 LJ |
287 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
288 | sf_acts = rcu_dereference(flow->sf_acts); | |
289 | ovs_execute_actions(dp, skb, sf_acts, key); | |
ccb1352e | 290 | |
e298e505 | 291 | stats_counter = &stats->n_hit; |
ccb1352e JG |
292 | |
293 | out: | |
294 | /* Update datapath statistics. */ | |
df9d9fdf | 295 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 296 | (*stats_counter)++; |
1bd7116f | 297 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 298 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
299 | } |
300 | ||
ccb1352e | 301 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 302 | const struct sw_flow_key *key, |
46df7b81 | 303 | const struct dp_upcall_info *upcall_info) |
ccb1352e JG |
304 | { |
305 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
306 | int err; |
307 | ||
15e47304 | 308 | if (upcall_info->portid == 0) { |
ccb1352e JG |
309 | err = -ENOTCONN; |
310 | goto err; | |
311 | } | |
312 | ||
ccb1352e | 313 | if (!skb_is_gso(skb)) |
e8eedb85 | 314 | err = queue_userspace_packet(dp, skb, key, upcall_info); |
ccb1352e | 315 | else |
e8eedb85 | 316 | err = queue_gso_packets(dp, skb, key, upcall_info); |
ccb1352e JG |
317 | if (err) |
318 | goto err; | |
319 | ||
320 | return 0; | |
321 | ||
322 | err: | |
404f2f10 | 323 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 324 | |
df9d9fdf | 325 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 326 | stats->n_lost++; |
df9d9fdf | 327 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
328 | |
329 | return err; | |
330 | } | |
331 | ||
8055a89c | 332 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 333 | const struct sw_flow_key *key, |
ccb1352e JG |
334 | const struct dp_upcall_info *upcall_info) |
335 | { | |
a1b5d0dd | 336 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
ccb1352e JG |
337 | struct sw_flow_key later_key; |
338 | struct sk_buff *segs, *nskb; | |
339 | int err; | |
340 | ||
9207f9d4 | 341 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET); |
09c5e605 | 342 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
343 | if (IS_ERR(segs)) |
344 | return PTR_ERR(segs); | |
330966e5 FW |
345 | if (segs == NULL) |
346 | return -EINVAL; | |
ccb1352e | 347 | |
e8eedb85 PS |
348 | if (gso_type & SKB_GSO_UDP) { |
349 | /* The initial flow key extracted by ovs_flow_key_extract() | |
350 | * in this case is for a first fragment, so we need to | |
351 | * properly mark later fragments. | |
352 | */ | |
353 | later_key = *key; | |
354 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
355 | } | |
356 | ||
ccb1352e JG |
357 | /* Queue all of the segments. */ |
358 | skb = segs; | |
359 | do { | |
e8eedb85 PS |
360 | if (gso_type & SKB_GSO_UDP && skb != segs) |
361 | key = &later_key; | |
362 | ||
363 | err = queue_userspace_packet(dp, skb, key, upcall_info); | |
ccb1352e JG |
364 | if (err) |
365 | break; | |
366 | ||
ccb1352e JG |
367 | } while ((skb = skb->next)); |
368 | ||
369 | /* Free all of the segments. */ | |
370 | skb = segs; | |
371 | do { | |
372 | nskb = skb->next; | |
373 | if (err) | |
374 | kfree_skb(skb); | |
375 | else | |
376 | consume_skb(skb); | |
377 | } while ((skb = nskb)); | |
378 | return err; | |
379 | } | |
380 | ||
8f0aad6f | 381 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
bda56f14 | 382 | unsigned int hdrlen) |
c3ff8cfe TG |
383 | { |
384 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 385 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
41af73e9 | 386 | + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
c3ff8cfe TG |
387 | |
388 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
389 | if (upcall_info->userdata) |
390 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
391 | ||
392 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
393 | if (upcall_info->egress_tun_info) | |
394 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 395 | |
ccea7445 NM |
396 | /* OVS_PACKET_ATTR_ACTIONS */ |
397 | if (upcall_info->actions_len) | |
398 | size += nla_total_size(upcall_info->actions_len); | |
399 | ||
7f8a436e JS |
400 | /* OVS_PACKET_ATTR_MRU */ |
401 | if (upcall_info->mru) | |
402 | size += nla_total_size(sizeof(upcall_info->mru)); | |
403 | ||
c3ff8cfe TG |
404 | return size; |
405 | } | |
406 | ||
7f8a436e JS |
407 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
408 | { | |
409 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
410 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
411 | ||
412 | if (plen > 0) | |
413 | memset(skb_put(skb, plen), 0, plen); | |
414 | } | |
415 | } | |
416 | ||
8055a89c | 417 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 418 | const struct sw_flow_key *key, |
ccb1352e JG |
419 | const struct dp_upcall_info *upcall_info) |
420 | { | |
421 | struct ovs_header *upcall; | |
422 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 423 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 424 | struct nlattr *nla; |
795449d8 | 425 | size_t len; |
bda56f14 | 426 | unsigned int hlen; |
8055a89c TG |
427 | int err, dp_ifindex; |
428 | ||
429 | dp_ifindex = get_dpifindex(dp); | |
430 | if (!dp_ifindex) | |
431 | return -ENODEV; | |
ccb1352e | 432 | |
df8a39de | 433 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
434 | nskb = skb_clone(skb, GFP_ATOMIC); |
435 | if (!nskb) | |
436 | return -ENOMEM; | |
437 | ||
5968250c | 438 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 439 | if (!nskb) |
ccb1352e JG |
440 | return -ENOMEM; |
441 | ||
ccb1352e JG |
442 | skb = nskb; |
443 | } | |
444 | ||
445 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
446 | err = -EFBIG; | |
447 | goto out; | |
448 | } | |
449 | ||
bda56f14 TG |
450 | /* Complete checksum if needed */ |
451 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
452 | (err = skb_checksum_help(skb))) | |
453 | goto out; | |
454 | ||
455 | /* Older versions of OVS user space enforce alignment of the last | |
456 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
457 | * padding logic. Only perform zerocopy if padding is not required. | |
458 | */ | |
459 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
460 | hlen = skb_zerocopy_headlen(skb); | |
461 | else | |
462 | hlen = skb->len; | |
463 | ||
8f0aad6f | 464 | len = upcall_msg_size(upcall_info, hlen); |
551ddc05 | 465 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
ccb1352e JG |
466 | if (!user_skb) { |
467 | err = -ENOMEM; | |
468 | goto out; | |
469 | } | |
470 | ||
471 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
472 | 0, upcall_info->cmd); | |
473 | upcall->dp_ifindex = dp_ifindex; | |
474 | ||
5b4237bb | 475 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
f53e3831 | 476 | BUG_ON(err); |
ccb1352e JG |
477 | |
478 | if (upcall_info->userdata) | |
4490108b BP |
479 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
480 | nla_len(upcall_info->userdata), | |
481 | nla_data(upcall_info->userdata)); | |
ccb1352e | 482 | |
8f0aad6f WZ |
483 | if (upcall_info->egress_tun_info) { |
484 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
fc4099f1 PS |
485 | err = ovs_nla_put_tunnel_info(user_skb, |
486 | upcall_info->egress_tun_info); | |
8f0aad6f WZ |
487 | BUG_ON(err); |
488 | nla_nest_end(user_skb, nla); | |
489 | } | |
490 | ||
ccea7445 NM |
491 | if (upcall_info->actions_len) { |
492 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS); | |
493 | err = ovs_nla_put_actions(upcall_info->actions, | |
494 | upcall_info->actions_len, | |
495 | user_skb); | |
496 | if (!err) | |
497 | nla_nest_end(user_skb, nla); | |
498 | else | |
499 | nla_nest_cancel(user_skb, nla); | |
500 | } | |
501 | ||
7f8a436e JS |
502 | /* Add OVS_PACKET_ATTR_MRU */ |
503 | if (upcall_info->mru) { | |
504 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
505 | upcall_info->mru)) { | |
506 | err = -ENOBUFS; | |
507 | goto out; | |
508 | } | |
509 | pad_packet(dp, user_skb); | |
510 | } | |
511 | ||
bda56f14 TG |
512 | /* Only reserve room for attribute header, packet data is added |
513 | * in skb_zerocopy() */ | |
514 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
515 | err = -ENOBUFS; | |
516 | goto out; | |
517 | } | |
518 | nla->nla_len = nla_attr_size(skb->len); | |
ccb1352e | 519 | |
36d5fe6a ZK |
520 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
521 | if (err) | |
522 | goto out; | |
ccb1352e | 523 | |
aea0bb4f | 524 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 525 | pad_packet(dp, user_skb); |
aea0bb4f | 526 | |
bda56f14 | 527 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 528 | |
bda56f14 | 529 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 530 | user_skb = NULL; |
ccb1352e | 531 | out: |
36d5fe6a ZK |
532 | if (err) |
533 | skb_tx_error(skb); | |
4ee45ea0 | 534 | kfree_skb(user_skb); |
ccb1352e JG |
535 | kfree_skb(nskb); |
536 | return err; | |
537 | } | |
538 | ||
ccb1352e JG |
539 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
540 | { | |
541 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 542 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
543 | struct nlattr **a = info->attrs; |
544 | struct sw_flow_actions *acts; | |
545 | struct sk_buff *packet; | |
546 | struct sw_flow *flow; | |
d98612b8 | 547 | struct sw_flow_actions *sf_acts; |
ccb1352e JG |
548 | struct datapath *dp; |
549 | struct ethhdr *eth; | |
83c8df26 | 550 | struct vport *input_vport; |
7f8a436e | 551 | u16 mru = 0; |
ccb1352e JG |
552 | int len; |
553 | int err; | |
1ba39804 | 554 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
555 | |
556 | err = -EINVAL; | |
557 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 558 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
559 | goto err; |
560 | ||
561 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
562 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
563 | err = -ENOMEM; | |
564 | if (!packet) | |
565 | goto err; | |
566 | skb_reserve(packet, NET_IP_ALIGN); | |
567 | ||
32686a9d | 568 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e JG |
569 | |
570 | skb_reset_mac_header(packet); | |
571 | eth = eth_hdr(packet); | |
572 | ||
573 | /* Normally, setting the skb 'protocol' field would be handled by a | |
574 | * call to eth_type_trans(), but it assumes there's a sending | |
575 | * device, which we may not have. */ | |
6713fc9b | 576 | if (eth_proto_is_802_3(eth->h_proto)) |
ccb1352e JG |
577 | packet->protocol = eth->h_proto; |
578 | else | |
579 | packet->protocol = htons(ETH_P_802_2); | |
580 | ||
7f8a436e JS |
581 | /* Set packet's mru */ |
582 | if (a[OVS_PACKET_ATTR_MRU]) { | |
583 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
584 | packet->ignore_df = 1; | |
585 | } | |
586 | OVS_CB(packet)->mru = mru; | |
587 | ||
ccb1352e | 588 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 589 | flow = ovs_flow_alloc(); |
ccb1352e JG |
590 | err = PTR_ERR(flow); |
591 | if (IS_ERR(flow)) | |
592 | goto err_kfree_skb; | |
593 | ||
c2ac6673 JS |
594 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
595 | packet, &flow->key, log); | |
ccb1352e JG |
596 | if (err) |
597 | goto err_flow_free; | |
598 | ||
7f8a436e | 599 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 600 | &flow->key, &acts, log); |
74f84a57 PS |
601 | if (err) |
602 | goto err_flow_free; | |
ccb1352e | 603 | |
f5796684 | 604 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 605 | packet->priority = flow->key.phy.priority; |
39c7caeb | 606 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
607 | |
608 | rcu_read_lock(); | |
7f8a436e | 609 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
610 | err = -ENODEV; |
611 | if (!dp) | |
612 | goto err_unlock; | |
613 | ||
83c8df26 PS |
614 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
615 | if (!input_vport) | |
616 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
617 | ||
618 | if (!input_vport) | |
619 | goto err_unlock; | |
620 | ||
7f8a436e | 621 | packet->dev = input_vport->dev; |
83c8df26 | 622 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 623 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 624 | |
ccb1352e | 625 | local_bh_disable(); |
d98612b8 | 626 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
627 | local_bh_enable(); |
628 | rcu_read_unlock(); | |
629 | ||
03f0d916 | 630 | ovs_flow_free(flow, false); |
ccb1352e JG |
631 | return err; |
632 | ||
633 | err_unlock: | |
634 | rcu_read_unlock(); | |
635 | err_flow_free: | |
03f0d916 | 636 | ovs_flow_free(flow, false); |
ccb1352e JG |
637 | err_kfree_skb: |
638 | kfree_skb(packet); | |
639 | err: | |
640 | return err; | |
641 | } | |
642 | ||
643 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 644 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
645 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
646 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 647 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 648 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
ccb1352e JG |
649 | }; |
650 | ||
4534de83 | 651 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e | 652 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
4a92602a | 653 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
654 | .policy = packet_policy, |
655 | .doit = ovs_packet_cmd_execute | |
656 | } | |
657 | }; | |
658 | ||
0c200ef9 PS |
659 | static struct genl_family dp_packet_genl_family = { |
660 | .id = GENL_ID_GENERATE, | |
661 | .hdrsize = sizeof(struct ovs_header), | |
662 | .name = OVS_PACKET_FAMILY, | |
663 | .version = OVS_PACKET_VERSION, | |
664 | .maxattr = OVS_PACKET_ATTR_MAX, | |
665 | .netnsok = true, | |
666 | .parallel_ops = true, | |
667 | .ops = dp_packet_genl_ops, | |
668 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
669 | }; | |
670 | ||
12eb18f7 | 671 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 672 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
673 | { |
674 | int i; | |
ccb1352e | 675 | |
1bd7116f AZ |
676 | memset(mega_stats, 0, sizeof(*mega_stats)); |
677 | ||
b637e498 | 678 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 679 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
680 | |
681 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 682 | |
ccb1352e JG |
683 | for_each_possible_cpu(i) { |
684 | const struct dp_stats_percpu *percpu_stats; | |
685 | struct dp_stats_percpu local_stats; | |
686 | unsigned int start; | |
687 | ||
688 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
689 | ||
690 | do { | |
57a7744e | 691 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 692 | local_stats = *percpu_stats; |
57a7744e | 693 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
694 | |
695 | stats->n_hit += local_stats.n_hit; | |
696 | stats->n_missed += local_stats.n_missed; | |
697 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 698 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
699 | } |
700 | } | |
701 | ||
74ed7ab9 JS |
702 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
703 | { | |
704 | return ovs_identifier_is_ufid(sfid) && | |
705 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
706 | } | |
707 | ||
708 | static bool should_fill_mask(uint32_t ufid_flags) | |
709 | { | |
710 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
711 | } | |
712 | ||
713 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 714 | { |
74ed7ab9 JS |
715 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
716 | } | |
717 | ||
718 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
719 | const struct sw_flow_id *sfid, | |
720 | uint32_t ufid_flags) | |
721 | { | |
722 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
723 | ||
724 | /* OVS_FLOW_ATTR_UFID */ | |
725 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
726 | len += nla_total_size(sfid->ufid_len); | |
727 | ||
728 | /* OVS_FLOW_ATTR_KEY */ | |
729 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
730 | len += nla_total_size(ovs_key_attr_size()); | |
731 | ||
732 | /* OVS_FLOW_ATTR_MASK */ | |
733 | if (should_fill_mask(ufid_flags)) | |
734 | len += nla_total_size(ovs_key_attr_size()); | |
735 | ||
736 | /* OVS_FLOW_ATTR_ACTIONS */ | |
737 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 738 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
739 | |
740 | return len | |
66c7a5ee | 741 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
c3ff8cfe | 742 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
66c7a5ee | 743 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
744 | } |
745 | ||
ca7105f2 JS |
746 | /* Called with ovs_mutex or RCU read lock. */ |
747 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
748 | struct sk_buff *skb) | |
749 | { | |
750 | struct ovs_flow_stats stats; | |
751 | __be16 tcp_flags; | |
752 | unsigned long used; | |
ccb1352e | 753 | |
e298e505 | 754 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 755 | |
028d6a67 | 756 | if (used && |
0238b720 ND |
757 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
758 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 759 | return -EMSGSIZE; |
ccb1352e | 760 | |
028d6a67 | 761 | if (stats.n_packets && |
66c7a5ee ND |
762 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
763 | sizeof(struct ovs_flow_stats), &stats, | |
764 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 765 | return -EMSGSIZE; |
ccb1352e | 766 | |
e298e505 PS |
767 | if ((u8)ntohs(tcp_flags) && |
768 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
769 | return -EMSGSIZE; |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
774 | /* Called with ovs_mutex or RCU read lock. */ | |
775 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
776 | struct sk_buff *skb, int skb_orig_len) | |
777 | { | |
778 | struct nlattr *start; | |
779 | int err; | |
ccb1352e JG |
780 | |
781 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
782 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
783 | * Netlink but individual action lists can be longer than | |
784 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
785 | * The userspace caller can always fetch the actions separately if it | |
786 | * really wants them. (Most userspace callers in fact don't care.) | |
787 | * | |
788 | * This can only fail for dump operations because the skb is always | |
789 | * properly sized for single flows. | |
790 | */ | |
74f84a57 PS |
791 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
792 | if (start) { | |
d57170b1 PS |
793 | const struct sw_flow_actions *sf_acts; |
794 | ||
663efa36 | 795 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
796 | err = ovs_nla_put_actions(sf_acts->actions, |
797 | sf_acts->actions_len, skb); | |
0e9796b4 | 798 | |
74f84a57 PS |
799 | if (!err) |
800 | nla_nest_end(skb, start); | |
801 | else { | |
802 | if (skb_orig_len) | |
ca7105f2 | 803 | return err; |
74f84a57 PS |
804 | |
805 | nla_nest_cancel(skb, start); | |
806 | } | |
ca7105f2 JS |
807 | } else if (skb_orig_len) { |
808 | return -EMSGSIZE; | |
809 | } | |
810 | ||
811 | return 0; | |
812 | } | |
813 | ||
814 | /* Called with ovs_mutex or RCU read lock. */ | |
815 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
816 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 817 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
818 | { |
819 | const int skb_orig_len = skb->len; | |
820 | struct ovs_header *ovs_header; | |
821 | int err; | |
822 | ||
823 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
824 | flags, cmd); | |
825 | if (!ovs_header) | |
826 | return -EMSGSIZE; | |
827 | ||
828 | ovs_header->dp_ifindex = dp_ifindex; | |
829 | ||
74ed7ab9 | 830 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
831 | if (err) |
832 | goto error; | |
833 | ||
74ed7ab9 JS |
834 | if (should_fill_key(&flow->id, ufid_flags)) { |
835 | err = ovs_nla_put_masked_key(flow, skb); | |
836 | if (err) | |
837 | goto error; | |
838 | } | |
839 | ||
840 | if (should_fill_mask(ufid_flags)) { | |
841 | err = ovs_nla_put_mask(flow, skb); | |
842 | if (err) | |
843 | goto error; | |
844 | } | |
ca7105f2 JS |
845 | |
846 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
847 | if (err) | |
848 | goto error; | |
849 | ||
74ed7ab9 JS |
850 | if (should_fill_actions(ufid_flags)) { |
851 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
852 | if (err) | |
853 | goto error; | |
854 | } | |
ccb1352e | 855 | |
053c095a JB |
856 | genlmsg_end(skb, ovs_header); |
857 | return 0; | |
ccb1352e | 858 | |
ccb1352e JG |
859 | error: |
860 | genlmsg_cancel(skb, ovs_header); | |
861 | return err; | |
862 | } | |
863 | ||
0e9796b4 JR |
864 | /* May not be called with RCU read lock. */ |
865 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 866 | const struct sw_flow_id *sfid, |
fb5d1e9e | 867 | struct genl_info *info, |
74ed7ab9 JS |
868 | bool always, |
869 | uint32_t ufid_flags) | |
ccb1352e | 870 | { |
fb5d1e9e | 871 | struct sk_buff *skb; |
74ed7ab9 | 872 | size_t len; |
ccb1352e | 873 | |
9b67aa4a | 874 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
875 | return NULL; |
876 | ||
74ed7ab9 | 877 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
551ddc05 | 878 | skb = genlmsg_new(len, GFP_KERNEL); |
fb5d1e9e JR |
879 | if (!skb) |
880 | return ERR_PTR(-ENOMEM); | |
881 | ||
882 | return skb; | |
ccb1352e JG |
883 | } |
884 | ||
0e9796b4 JR |
885 | /* Called with ovs_mutex. */ |
886 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
887 | int dp_ifindex, | |
888 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 889 | bool always, u32 ufid_flags) |
ccb1352e JG |
890 | { |
891 | struct sk_buff *skb; | |
892 | int retval; | |
893 | ||
74ed7ab9 JS |
894 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
895 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 896 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 897 | return skb; |
ccb1352e | 898 | |
0e9796b4 JR |
899 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
900 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 901 | cmd, ufid_flags); |
ccb1352e JG |
902 | BUG_ON(retval < 0); |
903 | return skb; | |
904 | } | |
905 | ||
37bdc87b | 906 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 907 | { |
7f8a436e | 908 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
909 | struct nlattr **a = info->attrs; |
910 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 911 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 912 | struct sw_flow_mask mask; |
ccb1352e JG |
913 | struct sk_buff *reply; |
914 | struct datapath *dp; | |
74ed7ab9 | 915 | struct sw_flow_key key; |
37bdc87b | 916 | struct sw_flow_actions *acts; |
03f0d916 | 917 | struct sw_flow_match match; |
74ed7ab9 | 918 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 919 | int error; |
05da5898 | 920 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 921 | |
893f139b | 922 | /* Must have key and actions. */ |
ccb1352e | 923 | error = -EINVAL; |
426cda5c | 924 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 925 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 926 | goto error; |
426cda5c JG |
927 | } |
928 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 929 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 930 | goto error; |
426cda5c | 931 | } |
03f0d916 | 932 | |
893f139b JR |
933 | /* Most of the time we need to allocate a new flow, do it before |
934 | * locking. | |
935 | */ | |
936 | new_flow = ovs_flow_alloc(); | |
937 | if (IS_ERR(new_flow)) { | |
938 | error = PTR_ERR(new_flow); | |
939 | goto error; | |
940 | } | |
941 | ||
942 | /* Extract key. */ | |
74ed7ab9 | 943 | ovs_match_init(&match, &key, &mask); |
c2ac6673 | 944 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 945 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 946 | if (error) |
893f139b | 947 | goto err_kfree_flow; |
ccb1352e | 948 | |
ae5f2fb1 | 949 | ovs_flow_mask_key(&new_flow->key, &key, true, &mask); |
74ed7ab9 JS |
950 | |
951 | /* Extract flow identifier. */ | |
952 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
953 | &key, log); | |
954 | if (error) | |
955 | goto err_kfree_flow; | |
74f84a57 | 956 | |
893f139b | 957 | /* Validate actions. */ |
7f8a436e JS |
958 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
959 | &new_flow->key, &acts, log); | |
37bdc87b | 960 | if (error) { |
05da5898 | 961 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 962 | goto err_kfree_flow; |
893f139b JR |
963 | } |
964 | ||
74ed7ab9 JS |
965 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
966 | ufid_flags); | |
893f139b JR |
967 | if (IS_ERR(reply)) { |
968 | error = PTR_ERR(reply); | |
969 | goto err_kfree_acts; | |
ccb1352e JG |
970 | } |
971 | ||
8e4e1713 | 972 | ovs_lock(); |
7f8a436e | 973 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
974 | if (unlikely(!dp)) { |
975 | error = -ENODEV; | |
8e4e1713 | 976 | goto err_unlock_ovs; |
893f139b | 977 | } |
74ed7ab9 | 978 | |
03f0d916 | 979 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
980 | if (ovs_identifier_is_ufid(&new_flow->id)) |
981 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
982 | if (!flow) | |
983 | flow = ovs_flow_tbl_lookup(&dp->table, &key); | |
893f139b JR |
984 | if (likely(!flow)) { |
985 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
986 | |
987 | /* Put flow in bucket. */ | |
893f139b JR |
988 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
989 | if (unlikely(error)) { | |
618ed0c8 | 990 | acts = NULL; |
893f139b JR |
991 | goto err_unlock_ovs; |
992 | } | |
993 | ||
994 | if (unlikely(reply)) { | |
995 | error = ovs_flow_cmd_fill_info(new_flow, | |
996 | ovs_header->dp_ifindex, | |
997 | reply, info->snd_portid, | |
998 | info->snd_seq, 0, | |
74ed7ab9 JS |
999 | OVS_FLOW_CMD_NEW, |
1000 | ufid_flags); | |
893f139b | 1001 | BUG_ON(error < 0); |
618ed0c8 | 1002 | } |
893f139b | 1003 | ovs_unlock(); |
ccb1352e | 1004 | } else { |
37bdc87b JR |
1005 | struct sw_flow_actions *old_acts; |
1006 | ||
ccb1352e JG |
1007 | /* Bail out if we're not allowed to modify an existing flow. |
1008 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1009 | * because Generic Netlink treats the latter as a dump | |
1010 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1011 | * gets fixed. | |
1012 | */ | |
893f139b JR |
1013 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1014 | | NLM_F_EXCL))) { | |
1015 | error = -EEXIST; | |
8e4e1713 | 1016 | goto err_unlock_ovs; |
893f139b | 1017 | } |
74ed7ab9 JS |
1018 | /* The flow identifier has to be the same for flow updates. |
1019 | * Look for any overlapping flow. | |
1020 | */ | |
1021 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1022 | if (ovs_identifier_is_key(&flow->id)) | |
1023 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1024 | &match); | |
1025 | else /* UFID matches but key is different */ | |
1026 | flow = NULL; | |
4a46b24e AW |
1027 | if (!flow) { |
1028 | error = -ENOENT; | |
1029 | goto err_unlock_ovs; | |
1030 | } | |
893f139b | 1031 | } |
37bdc87b JR |
1032 | /* Update actions. */ |
1033 | old_acts = ovsl_dereference(flow->sf_acts); | |
1034 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1035 | |
893f139b JR |
1036 | if (unlikely(reply)) { |
1037 | error = ovs_flow_cmd_fill_info(flow, | |
1038 | ovs_header->dp_ifindex, | |
1039 | reply, info->snd_portid, | |
1040 | info->snd_seq, 0, | |
74ed7ab9 JS |
1041 | OVS_FLOW_CMD_NEW, |
1042 | ufid_flags); | |
893f139b JR |
1043 | BUG_ON(error < 0); |
1044 | } | |
1045 | ovs_unlock(); | |
37bdc87b | 1046 | |
34ae932a | 1047 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1048 | ovs_flow_free(new_flow, false); |
37bdc87b | 1049 | } |
893f139b JR |
1050 | |
1051 | if (reply) | |
1052 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1053 | return 0; |
1054 | ||
37bdc87b JR |
1055 | err_unlock_ovs: |
1056 | ovs_unlock(); | |
893f139b JR |
1057 | kfree_skb(reply); |
1058 | err_kfree_acts: | |
34ae932a | 1059 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1060 | err_kfree_flow: |
1061 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1062 | error: |
1063 | return error; | |
1064 | } | |
ccb1352e | 1065 | |
2fdb957d | 1066 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
7f8a436e JS |
1067 | static struct sw_flow_actions *get_flow_actions(struct net *net, |
1068 | const struct nlattr *a, | |
6b205b2c | 1069 | const struct sw_flow_key *key, |
05da5898 JR |
1070 | const struct sw_flow_mask *mask, |
1071 | bool log) | |
6b205b2c JG |
1072 | { |
1073 | struct sw_flow_actions *acts; | |
1074 | struct sw_flow_key masked_key; | |
1075 | int error; | |
1076 | ||
ae5f2fb1 | 1077 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1078 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1079 | if (error) { |
05da5898 JR |
1080 | OVS_NLERR(log, |
1081 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1082 | return ERR_PTR(error); |
1083 | } | |
1084 | ||
1085 | return acts; | |
1086 | } | |
1087 | ||
37bdc87b JR |
1088 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1089 | { | |
7f8a436e | 1090 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1091 | struct nlattr **a = info->attrs; |
1092 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1093 | struct sw_flow_key key; |
37bdc87b JR |
1094 | struct sw_flow *flow; |
1095 | struct sw_flow_mask mask; | |
1096 | struct sk_buff *reply = NULL; | |
1097 | struct datapath *dp; | |
893f139b | 1098 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1099 | struct sw_flow_match match; |
74ed7ab9 JS |
1100 | struct sw_flow_id sfid; |
1101 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
6f15cdbf | 1102 | int error = 0; |
05da5898 | 1103 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1104 | bool ufid_present; |
37bdc87b | 1105 | |
74ed7ab9 | 1106 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
6f15cdbf SG |
1107 | if (a[OVS_FLOW_ATTR_KEY]) { |
1108 | ovs_match_init(&match, &key, &mask); | |
1109 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], | |
1110 | a[OVS_FLOW_ATTR_MASK], log); | |
1111 | } else if (!ufid_present) { | |
1112 | OVS_NLERR(log, | |
1113 | "Flow set message rejected, Key attribute missing."); | |
1114 | error = -EINVAL; | |
1115 | } | |
37bdc87b JR |
1116 | if (error) |
1117 | goto error; | |
1118 | ||
1119 | /* Validate actions. */ | |
1120 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
6f15cdbf SG |
1121 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1122 | OVS_NLERR(log, | |
1123 | "Flow key attribute not present in set flow."); | |
1124 | error = -EINVAL; | |
1125 | goto error; | |
1126 | } | |
1127 | ||
7f8a436e JS |
1128 | acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], &key, |
1129 | &mask, log); | |
6b205b2c JG |
1130 | if (IS_ERR(acts)) { |
1131 | error = PTR_ERR(acts); | |
37bdc87b | 1132 | goto error; |
893f139b | 1133 | } |
893f139b | 1134 | |
2fdb957d | 1135 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1136 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1137 | ufid_flags); | |
893f139b JR |
1138 | if (IS_ERR(reply)) { |
1139 | error = PTR_ERR(reply); | |
1140 | goto err_kfree_acts; | |
be52c9e9 | 1141 | } |
37bdc87b | 1142 | } |
0e9796b4 | 1143 | |
37bdc87b | 1144 | ovs_lock(); |
7f8a436e | 1145 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1146 | if (unlikely(!dp)) { |
1147 | error = -ENODEV; | |
37bdc87b | 1148 | goto err_unlock_ovs; |
893f139b | 1149 | } |
37bdc87b | 1150 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1151 | if (ufid_present) |
1152 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1153 | else | |
1154 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1155 | if (unlikely(!flow)) { |
1156 | error = -ENOENT; | |
37bdc87b | 1157 | goto err_unlock_ovs; |
893f139b | 1158 | } |
4a46b24e | 1159 | |
37bdc87b | 1160 | /* Update actions, if present. */ |
893f139b | 1161 | if (likely(acts)) { |
37bdc87b JR |
1162 | old_acts = ovsl_dereference(flow->sf_acts); |
1163 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1164 | |
1165 | if (unlikely(reply)) { | |
1166 | error = ovs_flow_cmd_fill_info(flow, | |
1167 | ovs_header->dp_ifindex, | |
1168 | reply, info->snd_portid, | |
1169 | info->snd_seq, 0, | |
74ed7ab9 JS |
1170 | OVS_FLOW_CMD_NEW, |
1171 | ufid_flags); | |
893f139b JR |
1172 | BUG_ON(error < 0); |
1173 | } | |
1174 | } else { | |
1175 | /* Could not alloc without acts before locking. */ | |
1176 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
74ed7ab9 JS |
1177 | info, OVS_FLOW_CMD_NEW, false, |
1178 | ufid_flags); | |
1179 | ||
b5ffe634 | 1180 | if (IS_ERR(reply)) { |
893f139b JR |
1181 | error = PTR_ERR(reply); |
1182 | goto err_unlock_ovs; | |
1183 | } | |
ccb1352e | 1184 | } |
37bdc87b | 1185 | |
37bdc87b JR |
1186 | /* Clear stats. */ |
1187 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1188 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1189 | ovs_unlock(); |
ccb1352e | 1190 | |
893f139b JR |
1191 | if (reply) |
1192 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1193 | if (old_acts) | |
34ae932a | 1194 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1195 | |
ccb1352e JG |
1196 | return 0; |
1197 | ||
8e4e1713 PS |
1198 | err_unlock_ovs: |
1199 | ovs_unlock(); | |
893f139b JR |
1200 | kfree_skb(reply); |
1201 | err_kfree_acts: | |
34ae932a | 1202 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1203 | error: |
1204 | return error; | |
1205 | } | |
1206 | ||
1207 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1208 | { | |
1209 | struct nlattr **a = info->attrs; | |
1210 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1211 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1212 | struct sw_flow_key key; |
1213 | struct sk_buff *reply; | |
1214 | struct sw_flow *flow; | |
1215 | struct datapath *dp; | |
03f0d916 | 1216 | struct sw_flow_match match; |
74ed7ab9 JS |
1217 | struct sw_flow_id ufid; |
1218 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1219 | int err = 0; | |
05da5898 | 1220 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1221 | bool ufid_present; |
ccb1352e | 1222 | |
74ed7ab9 JS |
1223 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1224 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1225 | ovs_match_init(&match, &key, NULL); | |
c2ac6673 | 1226 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1227 | log); |
1228 | } else if (!ufid_present) { | |
05da5898 JR |
1229 | OVS_NLERR(log, |
1230 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1231 | err = -EINVAL; |
03f0d916 | 1232 | } |
ccb1352e JG |
1233 | if (err) |
1234 | return err; | |
1235 | ||
8e4e1713 | 1236 | ovs_lock(); |
46df7b81 | 1237 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1238 | if (!dp) { |
1239 | err = -ENODEV; | |
1240 | goto unlock; | |
1241 | } | |
ccb1352e | 1242 | |
74ed7ab9 JS |
1243 | if (ufid_present) |
1244 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1245 | else | |
1246 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1247 | if (!flow) { |
8e4e1713 PS |
1248 | err = -ENOENT; |
1249 | goto unlock; | |
1250 | } | |
ccb1352e | 1251 | |
0e9796b4 | 1252 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
74ed7ab9 | 1253 | OVS_FLOW_CMD_NEW, true, ufid_flags); |
8e4e1713 PS |
1254 | if (IS_ERR(reply)) { |
1255 | err = PTR_ERR(reply); | |
1256 | goto unlock; | |
1257 | } | |
ccb1352e | 1258 | |
8e4e1713 | 1259 | ovs_unlock(); |
ccb1352e | 1260 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1261 | unlock: |
1262 | ovs_unlock(); | |
1263 | return err; | |
ccb1352e JG |
1264 | } |
1265 | ||
1266 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1267 | { | |
1268 | struct nlattr **a = info->attrs; | |
1269 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1270 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1271 | struct sw_flow_key key; |
1272 | struct sk_buff *reply; | |
74ed7ab9 | 1273 | struct sw_flow *flow = NULL; |
ccb1352e | 1274 | struct datapath *dp; |
03f0d916 | 1275 | struct sw_flow_match match; |
74ed7ab9 JS |
1276 | struct sw_flow_id ufid; |
1277 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1278 | int err; |
05da5898 | 1279 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1280 | bool ufid_present; |
ccb1352e | 1281 | |
74ed7ab9 JS |
1282 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1283 | if (a[OVS_FLOW_ATTR_KEY]) { | |
aed06778 | 1284 | ovs_match_init(&match, &key, NULL); |
c2ac6673 JS |
1285 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1286 | NULL, log); | |
aed06778 JR |
1287 | if (unlikely(err)) |
1288 | return err; | |
1289 | } | |
1290 | ||
8e4e1713 | 1291 | ovs_lock(); |
46df7b81 | 1292 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1293 | if (unlikely(!dp)) { |
8e4e1713 PS |
1294 | err = -ENODEV; |
1295 | goto unlock; | |
1296 | } | |
46df7b81 | 1297 | |
74ed7ab9 | 1298 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1299 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1300 | goto unlock; |
1301 | } | |
03f0d916 | 1302 | |
74ed7ab9 JS |
1303 | if (ufid_present) |
1304 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1305 | else | |
1306 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1307 | if (unlikely(!flow)) { |
8e4e1713 PS |
1308 | err = -ENOENT; |
1309 | goto unlock; | |
1310 | } | |
ccb1352e | 1311 | |
b637e498 | 1312 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1313 | ovs_unlock(); |
ccb1352e | 1314 | |
aed06778 | 1315 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1316 | &flow->id, info, false, ufid_flags); |
aed06778 JR |
1317 | if (likely(reply)) { |
1318 | if (likely(!IS_ERR(reply))) { | |
1319 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1320 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1321 | reply, info->snd_portid, | |
1322 | info->snd_seq, 0, | |
74ed7ab9 JS |
1323 | OVS_FLOW_CMD_DEL, |
1324 | ufid_flags); | |
aed06778 JR |
1325 | rcu_read_unlock(); |
1326 | BUG_ON(err < 0); | |
1327 | ||
1328 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1329 | } else { | |
1330 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1331 | } | |
fb5d1e9e | 1332 | } |
ccb1352e | 1333 | |
aed06778 | 1334 | ovs_flow_free(flow, true); |
ccb1352e | 1335 | return 0; |
8e4e1713 PS |
1336 | unlock: |
1337 | ovs_unlock(); | |
1338 | return err; | |
ccb1352e JG |
1339 | } |
1340 | ||
1341 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1342 | { | |
74ed7ab9 | 1343 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1344 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1345 | struct table_instance *ti; |
ccb1352e | 1346 | struct datapath *dp; |
74ed7ab9 JS |
1347 | u32 ufid_flags; |
1348 | int err; | |
1349 | ||
1350 | err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a, | |
1351 | OVS_FLOW_ATTR_MAX, flow_policy); | |
1352 | if (err) | |
1353 | return err; | |
1354 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1355 | |
d57170b1 | 1356 | rcu_read_lock(); |
cc3a5ae6 | 1357 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1358 | if (!dp) { |
d57170b1 | 1359 | rcu_read_unlock(); |
ccb1352e | 1360 | return -ENODEV; |
8e4e1713 | 1361 | } |
ccb1352e | 1362 | |
b637e498 | 1363 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1364 | for (;;) { |
1365 | struct sw_flow *flow; | |
1366 | u32 bucket, obj; | |
1367 | ||
1368 | bucket = cb->args[0]; | |
1369 | obj = cb->args[1]; | |
b637e498 | 1370 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1371 | if (!flow) |
1372 | break; | |
1373 | ||
0e9796b4 | 1374 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1375 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1376 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
74ed7ab9 | 1377 | OVS_FLOW_CMD_NEW, ufid_flags) < 0) |
ccb1352e JG |
1378 | break; |
1379 | ||
1380 | cb->args[0] = bucket; | |
1381 | cb->args[1] = obj; | |
1382 | } | |
d57170b1 | 1383 | rcu_read_unlock(); |
ccb1352e JG |
1384 | return skb->len; |
1385 | } | |
1386 | ||
0c200ef9 PS |
1387 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1388 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1389 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1390 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1391 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1392 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1393 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1394 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1395 | }; |
1396 | ||
48e48a70 | 1397 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e | 1398 | { .cmd = OVS_FLOW_CMD_NEW, |
4a92602a | 1399 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e | 1400 | .policy = flow_policy, |
37bdc87b | 1401 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1402 | }, |
1403 | { .cmd = OVS_FLOW_CMD_DEL, | |
4a92602a | 1404 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1405 | .policy = flow_policy, |
1406 | .doit = ovs_flow_cmd_del | |
1407 | }, | |
1408 | { .cmd = OVS_FLOW_CMD_GET, | |
1409 | .flags = 0, /* OK for unprivileged users. */ | |
1410 | .policy = flow_policy, | |
1411 | .doit = ovs_flow_cmd_get, | |
1412 | .dumpit = ovs_flow_cmd_dump | |
1413 | }, | |
1414 | { .cmd = OVS_FLOW_CMD_SET, | |
4a92602a | 1415 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e | 1416 | .policy = flow_policy, |
37bdc87b | 1417 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1418 | }, |
1419 | }; | |
1420 | ||
0c200ef9 | 1421 | static struct genl_family dp_flow_genl_family = { |
ccb1352e JG |
1422 | .id = GENL_ID_GENERATE, |
1423 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1424 | .name = OVS_FLOW_FAMILY, |
1425 | .version = OVS_FLOW_VERSION, | |
1426 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3a4e0d6a PS |
1427 | .netnsok = true, |
1428 | .parallel_ops = true, | |
0c200ef9 PS |
1429 | .ops = dp_flow_genl_ops, |
1430 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1431 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1432 | .n_mcgrps = 1, | |
ccb1352e JG |
1433 | }; |
1434 | ||
c3ff8cfe TG |
1435 | static size_t ovs_dp_cmd_msg_size(void) |
1436 | { | |
1437 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1438 | ||
1439 | msgsize += nla_total_size(IFNAMSIZ); | |
66c7a5ee ND |
1440 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1441 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
45fb9c35 | 1442 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1443 | |
1444 | return msgsize; | |
1445 | } | |
1446 | ||
8ec609d8 | 1447 | /* Called with ovs_mutex. */ |
ccb1352e | 1448 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1449 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1450 | { |
1451 | struct ovs_header *ovs_header; | |
1452 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1453 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1454 | int err; |
1455 | ||
15e47304 | 1456 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1457 | flags, cmd); |
1458 | if (!ovs_header) | |
1459 | goto error; | |
1460 | ||
1461 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1462 | ||
ccb1352e | 1463 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1464 | if (err) |
1465 | goto nla_put_failure; | |
1466 | ||
1bd7116f | 1467 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
66c7a5ee ND |
1468 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1469 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1bd7116f AZ |
1470 | goto nla_put_failure; |
1471 | ||
66c7a5ee ND |
1472 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1473 | sizeof(struct ovs_dp_megaflow_stats), | |
1474 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
028d6a67 | 1475 | goto nla_put_failure; |
ccb1352e | 1476 | |
43d4be9c TG |
1477 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1478 | goto nla_put_failure; | |
1479 | ||
053c095a JB |
1480 | genlmsg_end(skb, ovs_header); |
1481 | return 0; | |
ccb1352e JG |
1482 | |
1483 | nla_put_failure: | |
1484 | genlmsg_cancel(skb, ovs_header); | |
1485 | error: | |
1486 | return -EMSGSIZE; | |
1487 | } | |
1488 | ||
263ea090 | 1489 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
ccb1352e | 1490 | { |
551ddc05 | 1491 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1492 | } |
1493 | ||
bb6f9a70 | 1494 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1495 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1496 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1497 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1498 | { | |
1499 | struct datapath *dp; | |
1500 | ||
1501 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1502 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1503 | else { |
1504 | struct vport *vport; | |
1505 | ||
46df7b81 | 1506 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1507 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1508 | } |
1509 | return dp ? dp : ERR_PTR(-ENODEV); | |
1510 | } | |
1511 | ||
44da5ae5 TG |
1512 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1513 | { | |
1514 | struct datapath *dp; | |
1515 | ||
1516 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1517 | if (IS_ERR(dp)) |
44da5ae5 TG |
1518 | return; |
1519 | ||
1520 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1521 | dp->user_features = 0; | |
1522 | } | |
1523 | ||
12eb18f7 | 1524 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
43d4be9c TG |
1525 | { |
1526 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1527 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1528 | } | |
1529 | ||
ccb1352e JG |
1530 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1531 | { | |
1532 | struct nlattr **a = info->attrs; | |
1533 | struct vport_parms parms; | |
1534 | struct sk_buff *reply; | |
1535 | struct datapath *dp; | |
1536 | struct vport *vport; | |
46df7b81 | 1537 | struct ovs_net *ovs_net; |
15eac2a7 | 1538 | int err, i; |
ccb1352e JG |
1539 | |
1540 | err = -EINVAL; | |
1541 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1542 | goto err; | |
1543 | ||
263ea090 | 1544 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1545 | if (!reply) |
1546 | return -ENOMEM; | |
ccb1352e JG |
1547 | |
1548 | err = -ENOMEM; | |
1549 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1550 | if (dp == NULL) | |
6093ae9a | 1551 | goto err_free_reply; |
46df7b81 | 1552 | |
efd7ef1c | 1553 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1554 | |
1555 | /* Allocate table. */ | |
b637e498 PS |
1556 | err = ovs_flow_tbl_init(&dp->table); |
1557 | if (err) | |
ccb1352e JG |
1558 | goto err_free_dp; |
1559 | ||
1c213bd2 | 1560 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1561 | if (!dp->stats_percpu) { |
1562 | err = -ENOMEM; | |
1563 | goto err_destroy_table; | |
1564 | } | |
1565 | ||
15eac2a7 | 1566 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
e6445719 | 1567 | GFP_KERNEL); |
15eac2a7 PS |
1568 | if (!dp->ports) { |
1569 | err = -ENOMEM; | |
1570 | goto err_destroy_percpu; | |
1571 | } | |
1572 | ||
1573 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1574 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1575 | ||
ccb1352e JG |
1576 | /* Set up our datapath device. */ |
1577 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1578 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1579 | parms.options = NULL; | |
1580 | parms.dp = dp; | |
1581 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1582 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1583 | |
43d4be9c TG |
1584 | ovs_dp_change(dp, a); |
1585 | ||
6093ae9a JR |
1586 | /* So far only local changes have been made, now need the lock. */ |
1587 | ovs_lock(); | |
1588 | ||
ccb1352e JG |
1589 | vport = new_vport(&parms); |
1590 | if (IS_ERR(vport)) { | |
1591 | err = PTR_ERR(vport); | |
1592 | if (err == -EBUSY) | |
1593 | err = -EEXIST; | |
1594 | ||
44da5ae5 TG |
1595 | if (err == -EEXIST) { |
1596 | /* An outdated user space instance that does not understand | |
1597 | * the concept of user_features has attempted to create a new | |
1598 | * datapath and is likely to reuse it. Drop all user features. | |
1599 | */ | |
1600 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1601 | ovs_dp_reset_user_features(skb, info); | |
1602 | } | |
1603 | ||
15eac2a7 | 1604 | goto err_destroy_ports_array; |
ccb1352e JG |
1605 | } |
1606 | ||
6093ae9a JR |
1607 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1608 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1609 | BUG_ON(err < 0); | |
ccb1352e | 1610 | |
46df7b81 | 1611 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1612 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1613 | |
1614 | ovs_unlock(); | |
ccb1352e | 1615 | |
2a94fe48 | 1616 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1617 | return 0; |
1618 | ||
15eac2a7 | 1619 | err_destroy_ports_array: |
6093ae9a | 1620 | ovs_unlock(); |
15eac2a7 | 1621 | kfree(dp->ports); |
ccb1352e JG |
1622 | err_destroy_percpu: |
1623 | free_percpu(dp->stats_percpu); | |
1624 | err_destroy_table: | |
9b996e54 | 1625 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e JG |
1626 | err_free_dp: |
1627 | kfree(dp); | |
6093ae9a JR |
1628 | err_free_reply: |
1629 | kfree_skb(reply); | |
ccb1352e JG |
1630 | err: |
1631 | return err; | |
1632 | } | |
1633 | ||
8e4e1713 | 1634 | /* Called with ovs_mutex. */ |
46df7b81 | 1635 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1636 | { |
15eac2a7 | 1637 | int i; |
ccb1352e | 1638 | |
15eac2a7 PS |
1639 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1640 | struct vport *vport; | |
b67bfe0d | 1641 | struct hlist_node *n; |
15eac2a7 | 1642 | |
b67bfe0d | 1643 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1644 | if (vport->port_no != OVSP_LOCAL) |
1645 | ovs_dp_detach_port(vport); | |
1646 | } | |
ccb1352e | 1647 | |
59a35d60 | 1648 | list_del_rcu(&dp->list_node); |
ccb1352e | 1649 | |
8e4e1713 | 1650 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1651 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1652 | */ |
8e4e1713 | 1653 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1654 | |
e80857cc | 1655 | /* RCU destroy the flow table */ |
ccb1352e | 1656 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1657 | } |
1658 | ||
1659 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1660 | { | |
1661 | struct sk_buff *reply; | |
1662 | struct datapath *dp; | |
1663 | int err; | |
1664 | ||
263ea090 | 1665 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1666 | if (!reply) |
1667 | return -ENOMEM; | |
1668 | ||
8e4e1713 | 1669 | ovs_lock(); |
46df7b81 PS |
1670 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1671 | err = PTR_ERR(dp); | |
1672 | if (IS_ERR(dp)) | |
6093ae9a | 1673 | goto err_unlock_free; |
46df7b81 | 1674 | |
6093ae9a JR |
1675 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1676 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1677 | BUG_ON(err < 0); | |
46df7b81 PS |
1678 | |
1679 | __dp_destroy(dp); | |
8e4e1713 | 1680 | ovs_unlock(); |
ccb1352e | 1681 | |
2a94fe48 | 1682 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1683 | |
1684 | return 0; | |
6093ae9a JR |
1685 | |
1686 | err_unlock_free: | |
8e4e1713 | 1687 | ovs_unlock(); |
6093ae9a | 1688 | kfree_skb(reply); |
8e4e1713 | 1689 | return err; |
ccb1352e JG |
1690 | } |
1691 | ||
1692 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1693 | { | |
1694 | struct sk_buff *reply; | |
1695 | struct datapath *dp; | |
1696 | int err; | |
1697 | ||
263ea090 | 1698 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1699 | if (!reply) |
1700 | return -ENOMEM; | |
1701 | ||
8e4e1713 | 1702 | ovs_lock(); |
46df7b81 | 1703 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1704 | err = PTR_ERR(dp); |
ccb1352e | 1705 | if (IS_ERR(dp)) |
6093ae9a | 1706 | goto err_unlock_free; |
ccb1352e | 1707 | |
43d4be9c TG |
1708 | ovs_dp_change(dp, info->attrs); |
1709 | ||
6093ae9a JR |
1710 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1711 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1712 | BUG_ON(err < 0); | |
ccb1352e | 1713 | |
8e4e1713 | 1714 | ovs_unlock(); |
2a94fe48 | 1715 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1716 | |
1717 | return 0; | |
6093ae9a JR |
1718 | |
1719 | err_unlock_free: | |
8e4e1713 | 1720 | ovs_unlock(); |
6093ae9a | 1721 | kfree_skb(reply); |
8e4e1713 | 1722 | return err; |
ccb1352e JG |
1723 | } |
1724 | ||
1725 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1726 | { | |
1727 | struct sk_buff *reply; | |
1728 | struct datapath *dp; | |
8e4e1713 | 1729 | int err; |
ccb1352e | 1730 | |
263ea090 | 1731 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1732 | if (!reply) |
1733 | return -ENOMEM; | |
1734 | ||
8ec609d8 | 1735 | ovs_lock(); |
46df7b81 | 1736 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1737 | if (IS_ERR(dp)) { |
1738 | err = PTR_ERR(dp); | |
6093ae9a | 1739 | goto err_unlock_free; |
8e4e1713 | 1740 | } |
6093ae9a JR |
1741 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1742 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1743 | BUG_ON(err < 0); | |
8ec609d8 | 1744 | ovs_unlock(); |
ccb1352e JG |
1745 | |
1746 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1747 | |
6093ae9a | 1748 | err_unlock_free: |
8ec609d8 | 1749 | ovs_unlock(); |
6093ae9a | 1750 | kfree_skb(reply); |
8e4e1713 | 1751 | return err; |
ccb1352e JG |
1752 | } |
1753 | ||
1754 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1755 | { | |
46df7b81 | 1756 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1757 | struct datapath *dp; |
1758 | int skip = cb->args[0]; | |
1759 | int i = 0; | |
1760 | ||
8ec609d8 PS |
1761 | ovs_lock(); |
1762 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1763 | if (i >= skip && |
15e47304 | 1764 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1765 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1766 | OVS_DP_CMD_NEW) < 0) | |
1767 | break; | |
1768 | i++; | |
1769 | } | |
8ec609d8 | 1770 | ovs_unlock(); |
ccb1352e JG |
1771 | |
1772 | cb->args[0] = i; | |
1773 | ||
1774 | return skb->len; | |
1775 | } | |
1776 | ||
0c200ef9 PS |
1777 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1778 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1779 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1780 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1781 | }; | |
1782 | ||
48e48a70 | 1783 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e | 1784 | { .cmd = OVS_DP_CMD_NEW, |
4a92602a | 1785 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1786 | .policy = datapath_policy, |
1787 | .doit = ovs_dp_cmd_new | |
1788 | }, | |
1789 | { .cmd = OVS_DP_CMD_DEL, | |
4a92602a | 1790 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1791 | .policy = datapath_policy, |
1792 | .doit = ovs_dp_cmd_del | |
1793 | }, | |
1794 | { .cmd = OVS_DP_CMD_GET, | |
1795 | .flags = 0, /* OK for unprivileged users. */ | |
1796 | .policy = datapath_policy, | |
1797 | .doit = ovs_dp_cmd_get, | |
1798 | .dumpit = ovs_dp_cmd_dump | |
1799 | }, | |
1800 | { .cmd = OVS_DP_CMD_SET, | |
4a92602a | 1801 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1802 | .policy = datapath_policy, |
1803 | .doit = ovs_dp_cmd_set, | |
1804 | }, | |
1805 | }; | |
1806 | ||
0c200ef9 | 1807 | static struct genl_family dp_datapath_genl_family = { |
ccb1352e JG |
1808 | .id = GENL_ID_GENERATE, |
1809 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1810 | .name = OVS_DATAPATH_FAMILY, |
1811 | .version = OVS_DATAPATH_VERSION, | |
1812 | .maxattr = OVS_DP_ATTR_MAX, | |
3a4e0d6a PS |
1813 | .netnsok = true, |
1814 | .parallel_ops = true, | |
0c200ef9 PS |
1815 | .ops = dp_datapath_genl_ops, |
1816 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1817 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1818 | .n_mcgrps = 1, | |
ccb1352e JG |
1819 | }; |
1820 | ||
8e4e1713 | 1821 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1822 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1823 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1824 | { |
1825 | struct ovs_header *ovs_header; | |
1826 | struct ovs_vport_stats vport_stats; | |
1827 | int err; | |
1828 | ||
15e47304 | 1829 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1830 | flags, cmd); |
1831 | if (!ovs_header) | |
1832 | return -EMSGSIZE; | |
1833 | ||
1834 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1835 | ||
028d6a67 DM |
1836 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1837 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 1838 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
c9db965c | 1839 | ovs_vport_name(vport))) |
028d6a67 | 1840 | goto nla_put_failure; |
ccb1352e JG |
1841 | |
1842 | ovs_vport_get_stats(vport, &vport_stats); | |
66c7a5ee ND |
1843 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1844 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1845 | OVS_VPORT_ATTR_PAD)) | |
028d6a67 | 1846 | goto nla_put_failure; |
ccb1352e | 1847 | |
5cd667b0 AW |
1848 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1849 | goto nla_put_failure; | |
1850 | ||
ccb1352e JG |
1851 | err = ovs_vport_get_options(vport, skb); |
1852 | if (err == -EMSGSIZE) | |
1853 | goto error; | |
1854 | ||
053c095a JB |
1855 | genlmsg_end(skb, ovs_header); |
1856 | return 0; | |
ccb1352e JG |
1857 | |
1858 | nla_put_failure: | |
1859 | err = -EMSGSIZE; | |
1860 | error: | |
1861 | genlmsg_cancel(skb, ovs_header); | |
1862 | return err; | |
1863 | } | |
1864 | ||
6093ae9a JR |
1865 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1866 | { | |
1867 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1868 | } | |
1869 | ||
1870 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
15e47304 | 1871 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1872 | u32 seq, u8 cmd) |
1873 | { | |
1874 | struct sk_buff *skb; | |
1875 | int retval; | |
1876 | ||
1877 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1878 | if (!skb) | |
1879 | return ERR_PTR(-ENOMEM); | |
1880 | ||
15e47304 | 1881 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1882 | BUG_ON(retval < 0); |
1883 | ||
ccb1352e JG |
1884 | return skb; |
1885 | } | |
1886 | ||
8e4e1713 | 1887 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 1888 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 1889 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1890 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1891 | { | |
1892 | struct datapath *dp; | |
1893 | struct vport *vport; | |
1894 | ||
1895 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1896 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1897 | if (!vport) |
1898 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1899 | if (ovs_header->dp_ifindex && |
1900 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1901 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1902 | return vport; |
1903 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1904 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1905 | ||
1906 | if (port_no >= DP_MAX_PORTS) | |
1907 | return ERR_PTR(-EFBIG); | |
1908 | ||
46df7b81 | 1909 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1910 | if (!dp) |
1911 | return ERR_PTR(-ENODEV); | |
1912 | ||
8e4e1713 | 1913 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1914 | if (!vport) |
14408dba | 1915 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1916 | return vport; |
1917 | } else | |
1918 | return ERR_PTR(-EINVAL); | |
1919 | } | |
1920 | ||
3a927bc7 PA |
1921 | /* Called with ovs_mutex */ |
1922 | static void update_headroom(struct datapath *dp) | |
1923 | { | |
1924 | unsigned dev_headroom, max_headroom = 0; | |
1925 | struct net_device *dev; | |
1926 | struct vport *vport; | |
1927 | int i; | |
1928 | ||
1929 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1930 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
1931 | dev = vport->dev; | |
1932 | dev_headroom = netdev_get_fwd_headroom(dev); | |
1933 | if (dev_headroom > max_headroom) | |
1934 | max_headroom = dev_headroom; | |
1935 | } | |
1936 | } | |
1937 | ||
1938 | dp->max_headroom = max_headroom; | |
1939 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1940 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) | |
1941 | netdev_set_rx_headroom(vport->dev, max_headroom); | |
1942 | } | |
1943 | ||
ccb1352e JG |
1944 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1945 | { | |
1946 | struct nlattr **a = info->attrs; | |
1947 | struct ovs_header *ovs_header = info->userhdr; | |
1948 | struct vport_parms parms; | |
1949 | struct sk_buff *reply; | |
1950 | struct vport *vport; | |
1951 | struct datapath *dp; | |
1952 | u32 port_no; | |
1953 | int err; | |
1954 | ||
ccb1352e JG |
1955 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1956 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a JR |
1957 | return -EINVAL; |
1958 | ||
1959 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1960 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1961 | if (port_no >= DP_MAX_PORTS) | |
1962 | return -EFBIG; | |
1963 | ||
1964 | reply = ovs_vport_cmd_alloc_info(); | |
1965 | if (!reply) | |
1966 | return -ENOMEM; | |
ccb1352e | 1967 | |
8e4e1713 | 1968 | ovs_lock(); |
62b9c8d0 | 1969 | restart: |
46df7b81 | 1970 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1971 | err = -ENODEV; |
1972 | if (!dp) | |
6093ae9a | 1973 | goto exit_unlock_free; |
ccb1352e | 1974 | |
6093ae9a | 1975 | if (port_no) { |
8e4e1713 | 1976 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1977 | err = -EBUSY; |
1978 | if (vport) | |
6093ae9a | 1979 | goto exit_unlock_free; |
ccb1352e JG |
1980 | } else { |
1981 | for (port_no = 1; ; port_no++) { | |
1982 | if (port_no >= DP_MAX_PORTS) { | |
1983 | err = -EFBIG; | |
6093ae9a | 1984 | goto exit_unlock_free; |
ccb1352e | 1985 | } |
8e4e1713 | 1986 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1987 | if (!vport) |
1988 | break; | |
1989 | } | |
1990 | } | |
1991 | ||
1992 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
1993 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1994 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
1995 | parms.dp = dp; | |
1996 | parms.port_no = port_no; | |
5cd667b0 | 1997 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
1998 | |
1999 | vport = new_vport(&parms); | |
2000 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
2001 | if (IS_ERR(vport)) { |
2002 | if (err == -EAGAIN) | |
2003 | goto restart; | |
6093ae9a | 2004 | goto exit_unlock_free; |
62b9c8d0 | 2005 | } |
ccb1352e | 2006 | |
6093ae9a JR |
2007 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2008 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
3a927bc7 PA |
2009 | |
2010 | if (netdev_get_fwd_headroom(vport->dev) > dp->max_headroom) | |
2011 | update_headroom(dp); | |
2012 | else | |
2013 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2014 | ||
6093ae9a JR |
2015 | BUG_ON(err < 0); |
2016 | ovs_unlock(); | |
ed661185 | 2017 | |
2a94fe48 | 2018 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2019 | return 0; |
ccb1352e | 2020 | |
6093ae9a | 2021 | exit_unlock_free: |
8e4e1713 | 2022 | ovs_unlock(); |
6093ae9a | 2023 | kfree_skb(reply); |
ccb1352e JG |
2024 | return err; |
2025 | } | |
2026 | ||
2027 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2028 | { | |
2029 | struct nlattr **a = info->attrs; | |
2030 | struct sk_buff *reply; | |
2031 | struct vport *vport; | |
2032 | int err; | |
2033 | ||
6093ae9a JR |
2034 | reply = ovs_vport_cmd_alloc_info(); |
2035 | if (!reply) | |
2036 | return -ENOMEM; | |
2037 | ||
8e4e1713 | 2038 | ovs_lock(); |
46df7b81 | 2039 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2040 | err = PTR_ERR(vport); |
2041 | if (IS_ERR(vport)) | |
6093ae9a | 2042 | goto exit_unlock_free; |
ccb1352e | 2043 | |
ccb1352e | 2044 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2045 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2046 | err = -EINVAL; |
6093ae9a | 2047 | goto exit_unlock_free; |
a9341512 JG |
2048 | } |
2049 | ||
f44f3408 | 2050 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2051 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2052 | if (err) |
6093ae9a | 2053 | goto exit_unlock_free; |
f44f3408 | 2054 | } |
a9341512 | 2055 | |
5cd667b0 AW |
2056 | |
2057 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2058 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2059 | ||
2060 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2061 | if (err) | |
2062 | goto exit_unlock_free; | |
2063 | } | |
ccb1352e | 2064 | |
a9341512 JG |
2065 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2066 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2067 | BUG_ON(err < 0); | |
ccb1352e | 2068 | |
8e4e1713 | 2069 | ovs_unlock(); |
2a94fe48 | 2070 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2071 | return 0; |
ccb1352e | 2072 | |
6093ae9a | 2073 | exit_unlock_free: |
8e4e1713 | 2074 | ovs_unlock(); |
6093ae9a | 2075 | kfree_skb(reply); |
ccb1352e JG |
2076 | return err; |
2077 | } | |
2078 | ||
2079 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2080 | { | |
3a927bc7 | 2081 | bool must_update_headroom = false; |
ccb1352e JG |
2082 | struct nlattr **a = info->attrs; |
2083 | struct sk_buff *reply; | |
3a927bc7 | 2084 | struct datapath *dp; |
ccb1352e JG |
2085 | struct vport *vport; |
2086 | int err; | |
2087 | ||
6093ae9a JR |
2088 | reply = ovs_vport_cmd_alloc_info(); |
2089 | if (!reply) | |
2090 | return -ENOMEM; | |
2091 | ||
8e4e1713 | 2092 | ovs_lock(); |
46df7b81 | 2093 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2094 | err = PTR_ERR(vport); |
2095 | if (IS_ERR(vport)) | |
6093ae9a | 2096 | goto exit_unlock_free; |
ccb1352e JG |
2097 | |
2098 | if (vport->port_no == OVSP_LOCAL) { | |
2099 | err = -EINVAL; | |
6093ae9a | 2100 | goto exit_unlock_free; |
ccb1352e JG |
2101 | } |
2102 | ||
6093ae9a JR |
2103 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2104 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
2105 | BUG_ON(err < 0); | |
3a927bc7 PA |
2106 | |
2107 | /* the vport deletion may trigger dp headroom update */ | |
2108 | dp = vport->dp; | |
2109 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
2110 | must_update_headroom = true; | |
2111 | netdev_reset_rx_headroom(vport->dev); | |
ccb1352e | 2112 | ovs_dp_detach_port(vport); |
3a927bc7 PA |
2113 | |
2114 | if (must_update_headroom) | |
2115 | update_headroom(dp); | |
6093ae9a | 2116 | ovs_unlock(); |
ccb1352e | 2117 | |
2a94fe48 | 2118 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2119 | return 0; |
ccb1352e | 2120 | |
6093ae9a | 2121 | exit_unlock_free: |
8e4e1713 | 2122 | ovs_unlock(); |
6093ae9a | 2123 | kfree_skb(reply); |
ccb1352e JG |
2124 | return err; |
2125 | } | |
2126 | ||
2127 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2128 | { | |
2129 | struct nlattr **a = info->attrs; | |
2130 | struct ovs_header *ovs_header = info->userhdr; | |
2131 | struct sk_buff *reply; | |
2132 | struct vport *vport; | |
2133 | int err; | |
2134 | ||
6093ae9a JR |
2135 | reply = ovs_vport_cmd_alloc_info(); |
2136 | if (!reply) | |
2137 | return -ENOMEM; | |
2138 | ||
ccb1352e | 2139 | rcu_read_lock(); |
46df7b81 | 2140 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2141 | err = PTR_ERR(vport); |
2142 | if (IS_ERR(vport)) | |
6093ae9a JR |
2143 | goto exit_unlock_free; |
2144 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
2145 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2146 | BUG_ON(err < 0); | |
ccb1352e JG |
2147 | rcu_read_unlock(); |
2148 | ||
2149 | return genlmsg_reply(reply, info); | |
2150 | ||
6093ae9a | 2151 | exit_unlock_free: |
ccb1352e | 2152 | rcu_read_unlock(); |
6093ae9a | 2153 | kfree_skb(reply); |
ccb1352e JG |
2154 | return err; |
2155 | } | |
2156 | ||
2157 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2158 | { | |
2159 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2160 | struct datapath *dp; | |
15eac2a7 PS |
2161 | int bucket = cb->args[0], skip = cb->args[1]; |
2162 | int i, j = 0; | |
ccb1352e | 2163 | |
42ee19e2 | 2164 | rcu_read_lock(); |
cc3a5ae6 | 2165 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2166 | if (!dp) { |
2167 | rcu_read_unlock(); | |
ccb1352e | 2168 | return -ENODEV; |
42ee19e2 | 2169 | } |
15eac2a7 | 2170 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2171 | struct vport *vport; |
15eac2a7 PS |
2172 | |
2173 | j = 0; | |
b67bfe0d | 2174 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2175 | if (j >= skip && |
2176 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 2177 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2178 | cb->nlh->nlmsg_seq, |
2179 | NLM_F_MULTI, | |
2180 | OVS_VPORT_CMD_NEW) < 0) | |
2181 | goto out; | |
2182 | ||
2183 | j++; | |
2184 | } | |
2185 | skip = 0; | |
ccb1352e | 2186 | } |
15eac2a7 | 2187 | out: |
ccb1352e JG |
2188 | rcu_read_unlock(); |
2189 | ||
15eac2a7 PS |
2190 | cb->args[0] = i; |
2191 | cb->args[1] = j; | |
ccb1352e | 2192 | |
15eac2a7 | 2193 | return skb->len; |
ccb1352e JG |
2194 | } |
2195 | ||
0c200ef9 PS |
2196 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2197 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2198 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2199 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2200 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2201 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2202 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2203 | }; | |
2204 | ||
48e48a70 | 2205 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e | 2206 | { .cmd = OVS_VPORT_CMD_NEW, |
4a92602a | 2207 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2208 | .policy = vport_policy, |
2209 | .doit = ovs_vport_cmd_new | |
2210 | }, | |
2211 | { .cmd = OVS_VPORT_CMD_DEL, | |
4a92602a | 2212 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2213 | .policy = vport_policy, |
2214 | .doit = ovs_vport_cmd_del | |
2215 | }, | |
2216 | { .cmd = OVS_VPORT_CMD_GET, | |
2217 | .flags = 0, /* OK for unprivileged users. */ | |
2218 | .policy = vport_policy, | |
2219 | .doit = ovs_vport_cmd_get, | |
2220 | .dumpit = ovs_vport_cmd_dump | |
2221 | }, | |
2222 | { .cmd = OVS_VPORT_CMD_SET, | |
4a92602a | 2223 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2224 | .policy = vport_policy, |
2225 | .doit = ovs_vport_cmd_set, | |
2226 | }, | |
2227 | }; | |
2228 | ||
0c200ef9 PS |
2229 | struct genl_family dp_vport_genl_family = { |
2230 | .id = GENL_ID_GENERATE, | |
2231 | .hdrsize = sizeof(struct ovs_header), | |
2232 | .name = OVS_VPORT_FAMILY, | |
2233 | .version = OVS_VPORT_VERSION, | |
2234 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2235 | .netnsok = true, | |
2236 | .parallel_ops = true, | |
2237 | .ops = dp_vport_genl_ops, | |
2238 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2239 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2240 | .n_mcgrps = 1, | |
ccb1352e JG |
2241 | }; |
2242 | ||
0c200ef9 PS |
2243 | static struct genl_family * const dp_genl_families[] = { |
2244 | &dp_datapath_genl_family, | |
2245 | &dp_vport_genl_family, | |
2246 | &dp_flow_genl_family, | |
2247 | &dp_packet_genl_family, | |
ccb1352e JG |
2248 | }; |
2249 | ||
2250 | static void dp_unregister_genl(int n_families) | |
2251 | { | |
2252 | int i; | |
2253 | ||
2254 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2255 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2256 | } |
2257 | ||
2258 | static int dp_register_genl(void) | |
2259 | { | |
ccb1352e JG |
2260 | int err; |
2261 | int i; | |
2262 | ||
ccb1352e | 2263 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2264 | |
0c200ef9 | 2265 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2266 | if (err) |
2267 | goto error; | |
ccb1352e JG |
2268 | } |
2269 | ||
2270 | return 0; | |
2271 | ||
2272 | error: | |
0c200ef9 | 2273 | dp_unregister_genl(i); |
ccb1352e JG |
2274 | return err; |
2275 | } | |
2276 | ||
46df7b81 PS |
2277 | static int __net_init ovs_init_net(struct net *net) |
2278 | { | |
2279 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2280 | ||
2281 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2282 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
c2ac6673 | 2283 | ovs_ct_init(net); |
46df7b81 PS |
2284 | return 0; |
2285 | } | |
2286 | ||
7b4577a9 PS |
2287 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2288 | struct list_head *head) | |
46df7b81 | 2289 | { |
8e4e1713 | 2290 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2291 | struct datapath *dp; |
2292 | ||
2293 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2294 | int i; | |
2295 | ||
2296 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2297 | struct vport *vport; | |
2298 | ||
2299 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2300 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2301 | continue; | |
2302 | ||
be4ace6e | 2303 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2304 | list_add(&vport->detach_list, head); |
2305 | } | |
2306 | } | |
2307 | } | |
2308 | } | |
2309 | ||
2310 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2311 | { | |
2312 | struct datapath *dp, *dp_next; | |
2313 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2314 | struct vport *vport, *vport_next; | |
2315 | struct net *net; | |
2316 | LIST_HEAD(head); | |
46df7b81 | 2317 | |
c2ac6673 | 2318 | ovs_ct_exit(dnet); |
8e4e1713 | 2319 | ovs_lock(); |
46df7b81 PS |
2320 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2321 | __dp_destroy(dp); | |
7b4577a9 PS |
2322 | |
2323 | rtnl_lock(); | |
2324 | for_each_net(net) | |
2325 | list_vports_from_net(net, dnet, &head); | |
2326 | rtnl_unlock(); | |
2327 | ||
2328 | /* Detach all vports from given namespace. */ | |
2329 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2330 | list_del(&vport->detach_list); | |
2331 | ovs_dp_detach_port(vport); | |
2332 | } | |
2333 | ||
8e4e1713 PS |
2334 | ovs_unlock(); |
2335 | ||
2336 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2337 | } |
2338 | ||
2339 | static struct pernet_operations ovs_net_ops = { | |
2340 | .init = ovs_init_net, | |
2341 | .exit = ovs_exit_net, | |
2342 | .id = &ovs_net_id, | |
2343 | .size = sizeof(struct ovs_net), | |
2344 | }; | |
2345 | ||
ccb1352e JG |
2346 | static int __init dp_init(void) |
2347 | { | |
ccb1352e JG |
2348 | int err; |
2349 | ||
3523b29b | 2350 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2351 | |
2352 | pr_info("Open vSwitch switching datapath\n"); | |
2353 | ||
971427f3 | 2354 | err = action_fifos_init(); |
ccb1352e JG |
2355 | if (err) |
2356 | goto error; | |
2357 | ||
971427f3 AZ |
2358 | err = ovs_internal_dev_rtnl_link_register(); |
2359 | if (err) | |
2360 | goto error_action_fifos_exit; | |
2361 | ||
5b9e7e16 JP |
2362 | err = ovs_flow_init(); |
2363 | if (err) | |
2364 | goto error_unreg_rtnl_link; | |
2365 | ||
ccb1352e JG |
2366 | err = ovs_vport_init(); |
2367 | if (err) | |
2368 | goto error_flow_exit; | |
2369 | ||
46df7b81 | 2370 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2371 | if (err) |
2372 | goto error_vport_exit; | |
2373 | ||
46df7b81 PS |
2374 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2375 | if (err) | |
2376 | goto error_netns_exit; | |
2377 | ||
62b9c8d0 TG |
2378 | err = ovs_netdev_init(); |
2379 | if (err) | |
2380 | goto error_unreg_notifier; | |
2381 | ||
ccb1352e JG |
2382 | err = dp_register_genl(); |
2383 | if (err < 0) | |
62b9c8d0 | 2384 | goto error_unreg_netdev; |
ccb1352e | 2385 | |
ccb1352e JG |
2386 | return 0; |
2387 | ||
62b9c8d0 TG |
2388 | error_unreg_netdev: |
2389 | ovs_netdev_exit(); | |
ccb1352e JG |
2390 | error_unreg_notifier: |
2391 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2392 | error_netns_exit: |
2393 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2394 | error_vport_exit: |
2395 | ovs_vport_exit(); | |
2396 | error_flow_exit: | |
2397 | ovs_flow_exit(); | |
5b9e7e16 JP |
2398 | error_unreg_rtnl_link: |
2399 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2400 | error_action_fifos_exit: |
2401 | action_fifos_exit(); | |
ccb1352e JG |
2402 | error: |
2403 | return err; | |
2404 | } | |
2405 | ||
2406 | static void dp_cleanup(void) | |
2407 | { | |
ccb1352e | 2408 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2409 | ovs_netdev_exit(); |
ccb1352e | 2410 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2411 | unregister_pernet_device(&ovs_net_ops); |
2412 | rcu_barrier(); | |
ccb1352e JG |
2413 | ovs_vport_exit(); |
2414 | ovs_flow_exit(); | |
5b9e7e16 | 2415 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2416 | action_fifos_exit(); |
ccb1352e JG |
2417 | } |
2418 | ||
2419 | module_init(dp_init); | |
2420 | module_exit(dp_cleanup); | |
2421 | ||
2422 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2423 | MODULE_LICENSE("GPL"); |