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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 | ||
48e48a70 | 68 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
69 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
70 | }; |
71 | ||
48e48a70 | 72 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
73 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
74 | }; |
75 | ||
48e48a70 | 76 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
77 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
78 | }; |
79 | ||
fb5d1e9e JR |
80 | /* Check if need to build a reply message. |
81 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
82 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
83 | unsigned int group) | |
fb5d1e9e JR |
84 | { |
85 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
9b67aa4a SG |
86 | genl_has_listeners(family, genl_info_net(info)->genl_sock, |
87 | group); | |
fb5d1e9e JR |
88 | } |
89 | ||
68eb5503 | 90 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 91 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 92 | { |
68eb5503 | 93 | genl_notify(family, skb, genl_info_net(info), info->snd_portid, |
2a94fe48 | 94 | 0, info->nlhdr, 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); |
ccb1352e JG |
178 | return vport->ops->get_name(vport); |
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) |
cff63a52 | 190 | ifindex = netdev_vport_priv(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); |
46df7b81 | 205 | release_net(ovs_dp_get_net(dp)); |
15eac2a7 | 206 | kfree(dp->ports); |
ccb1352e JG |
207 | kfree(dp); |
208 | } | |
209 | ||
15eac2a7 PS |
210 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
211 | u16 port_no) | |
212 | { | |
213 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
214 | } | |
215 | ||
bb6f9a70 | 216 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
217 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
218 | { | |
219 | struct vport *vport; | |
15eac2a7 PS |
220 | struct hlist_head *head; |
221 | ||
222 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 223 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
224 | if (vport->port_no == port_no) |
225 | return vport; | |
226 | } | |
227 | return NULL; | |
228 | } | |
229 | ||
8e4e1713 | 230 | /* Called with ovs_mutex. */ |
ccb1352e JG |
231 | static struct vport *new_vport(const struct vport_parms *parms) |
232 | { | |
233 | struct vport *vport; | |
234 | ||
235 | vport = ovs_vport_add(parms); | |
236 | if (!IS_ERR(vport)) { | |
237 | struct datapath *dp = parms->dp; | |
15eac2a7 | 238 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 239 | |
15eac2a7 | 240 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 241 | } |
ccb1352e JG |
242 | return vport; |
243 | } | |
244 | ||
ccb1352e JG |
245 | void ovs_dp_detach_port(struct vport *p) |
246 | { | |
8e4e1713 | 247 | ASSERT_OVSL(); |
ccb1352e JG |
248 | |
249 | /* First drop references to device. */ | |
15eac2a7 | 250 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
251 | |
252 | /* Then destroy it. */ | |
253 | ovs_vport_del(p); | |
254 | } | |
255 | ||
256 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 257 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 258 | { |
83c8df26 | 259 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
260 | struct datapath *dp = p->dp; |
261 | struct sw_flow *flow; | |
d98612b8 | 262 | struct sw_flow_actions *sf_acts; |
ccb1352e | 263 | struct dp_stats_percpu *stats; |
ccb1352e | 264 | u64 *stats_counter; |
1bd7116f | 265 | u32 n_mask_hit; |
ccb1352e | 266 | |
404f2f10 | 267 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 268 | |
ccb1352e | 269 | /* Look up flow. */ |
8c8b1b83 | 270 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit); |
ccb1352e JG |
271 | if (unlikely(!flow)) { |
272 | struct dp_upcall_info upcall; | |
8c8b1b83 | 273 | int error; |
ccb1352e JG |
274 | |
275 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
ccb1352e | 276 | upcall.userdata = NULL; |
5cd667b0 | 277 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
8f0aad6f | 278 | upcall.egress_tun_info = NULL; |
e8eedb85 | 279 | error = ovs_dp_upcall(dp, skb, key, &upcall); |
c5eba0b6 LR |
280 | if (unlikely(error)) |
281 | kfree_skb(skb); | |
282 | else | |
283 | consume_skb(skb); | |
ccb1352e JG |
284 | stats_counter = &stats->n_missed; |
285 | goto out; | |
286 | } | |
287 | ||
d98612b8 LJ |
288 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
289 | sf_acts = rcu_dereference(flow->sf_acts); | |
290 | ovs_execute_actions(dp, skb, sf_acts, key); | |
ccb1352e | 291 | |
e298e505 | 292 | stats_counter = &stats->n_hit; |
ccb1352e JG |
293 | |
294 | out: | |
295 | /* Update datapath statistics. */ | |
df9d9fdf | 296 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 297 | (*stats_counter)++; |
1bd7116f | 298 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 299 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
300 | } |
301 | ||
ccb1352e | 302 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 303 | const struct sw_flow_key *key, |
46df7b81 | 304 | const struct dp_upcall_info *upcall_info) |
ccb1352e JG |
305 | { |
306 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
307 | int err; |
308 | ||
15e47304 | 309 | if (upcall_info->portid == 0) { |
ccb1352e JG |
310 | err = -ENOTCONN; |
311 | goto err; | |
312 | } | |
313 | ||
ccb1352e | 314 | if (!skb_is_gso(skb)) |
e8eedb85 | 315 | err = queue_userspace_packet(dp, skb, key, upcall_info); |
ccb1352e | 316 | else |
e8eedb85 | 317 | err = queue_gso_packets(dp, skb, key, upcall_info); |
ccb1352e JG |
318 | if (err) |
319 | goto err; | |
320 | ||
321 | return 0; | |
322 | ||
323 | err: | |
404f2f10 | 324 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 325 | |
df9d9fdf | 326 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 327 | stats->n_lost++; |
df9d9fdf | 328 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
329 | |
330 | return err; | |
331 | } | |
332 | ||
8055a89c | 333 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 334 | const struct sw_flow_key *key, |
ccb1352e JG |
335 | const struct dp_upcall_info *upcall_info) |
336 | { | |
a1b5d0dd | 337 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
ccb1352e JG |
338 | struct sw_flow_key later_key; |
339 | struct sk_buff *segs, *nskb; | |
e8eedb85 | 340 | struct ovs_skb_cb ovs_cb; |
ccb1352e JG |
341 | int err; |
342 | ||
e8eedb85 | 343 | ovs_cb = *OVS_CB(skb); |
09c5e605 | 344 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
e8eedb85 | 345 | *OVS_CB(skb) = ovs_cb; |
92e5dfc3 PS |
346 | if (IS_ERR(segs)) |
347 | return PTR_ERR(segs); | |
330966e5 FW |
348 | if (segs == NULL) |
349 | return -EINVAL; | |
ccb1352e | 350 | |
e8eedb85 PS |
351 | if (gso_type & SKB_GSO_UDP) { |
352 | /* The initial flow key extracted by ovs_flow_key_extract() | |
353 | * in this case is for a first fragment, so we need to | |
354 | * properly mark later fragments. | |
355 | */ | |
356 | later_key = *key; | |
357 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
358 | } | |
359 | ||
ccb1352e JG |
360 | /* Queue all of the segments. */ |
361 | skb = segs; | |
362 | do { | |
e8eedb85 PS |
363 | *OVS_CB(skb) = ovs_cb; |
364 | if (gso_type & SKB_GSO_UDP && skb != segs) | |
365 | key = &later_key; | |
366 | ||
367 | err = queue_userspace_packet(dp, skb, key, upcall_info); | |
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 */ |
41af73e9 | 390 | + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
c3ff8cfe TG |
391 | |
392 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
393 | if (upcall_info->userdata) |
394 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
395 | ||
396 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
397 | if (upcall_info->egress_tun_info) | |
398 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe TG |
399 | |
400 | return size; | |
401 | } | |
402 | ||
8055a89c | 403 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 404 | const struct sw_flow_key *key, |
ccb1352e JG |
405 | const struct dp_upcall_info *upcall_info) |
406 | { | |
407 | struct ovs_header *upcall; | |
408 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 409 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 410 | struct nlattr *nla; |
795449d8 | 411 | struct genl_info info = { |
8055a89c | 412 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
795449d8 TG |
413 | .snd_portid = upcall_info->portid, |
414 | }; | |
415 | size_t len; | |
bda56f14 | 416 | unsigned int hlen; |
8055a89c TG |
417 | int err, dp_ifindex; |
418 | ||
419 | dp_ifindex = get_dpifindex(dp); | |
420 | if (!dp_ifindex) | |
421 | return -ENODEV; | |
ccb1352e JG |
422 | |
423 | if (vlan_tx_tag_present(skb)) { | |
424 | nskb = skb_clone(skb, GFP_ATOMIC); | |
425 | if (!nskb) | |
426 | return -ENOMEM; | |
427 | ||
5968250c | 428 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 429 | if (!nskb) |
ccb1352e JG |
430 | return -ENOMEM; |
431 | ||
ccb1352e JG |
432 | skb = nskb; |
433 | } | |
434 | ||
435 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
436 | err = -EFBIG; | |
437 | goto out; | |
438 | } | |
439 | ||
bda56f14 TG |
440 | /* Complete checksum if needed */ |
441 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
442 | (err = skb_checksum_help(skb))) | |
443 | goto out; | |
444 | ||
445 | /* Older versions of OVS user space enforce alignment of the last | |
446 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
447 | * padding logic. Only perform zerocopy if padding is not required. | |
448 | */ | |
449 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
450 | hlen = skb_zerocopy_headlen(skb); | |
451 | else | |
452 | hlen = skb->len; | |
453 | ||
8f0aad6f | 454 | len = upcall_msg_size(upcall_info, hlen); |
795449d8 | 455 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
ccb1352e JG |
456 | if (!user_skb) { |
457 | err = -ENOMEM; | |
458 | goto out; | |
459 | } | |
460 | ||
461 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
462 | 0, upcall_info->cmd); | |
463 | upcall->dp_ifindex = dp_ifindex; | |
464 | ||
465 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
e8eedb85 | 466 | err = ovs_nla_put_flow(key, key, user_skb); |
f53e3831 | 467 | BUG_ON(err); |
ccb1352e JG |
468 | nla_nest_end(user_skb, nla); |
469 | ||
470 | if (upcall_info->userdata) | |
4490108b BP |
471 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
472 | nla_len(upcall_info->userdata), | |
473 | nla_data(upcall_info->userdata)); | |
ccb1352e | 474 | |
8f0aad6f WZ |
475 | if (upcall_info->egress_tun_info) { |
476 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
477 | err = ovs_nla_put_egress_tunnel_key(user_skb, | |
478 | upcall_info->egress_tun_info); | |
479 | BUG_ON(err); | |
480 | nla_nest_end(user_skb, nla); | |
481 | } | |
482 | ||
bda56f14 TG |
483 | /* Only reserve room for attribute header, packet data is added |
484 | * in skb_zerocopy() */ | |
485 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
486 | err = -ENOBUFS; | |
487 | goto out; | |
488 | } | |
489 | nla->nla_len = nla_attr_size(skb->len); | |
ccb1352e | 490 | |
36d5fe6a ZK |
491 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
492 | if (err) | |
493 | goto out; | |
ccb1352e | 494 | |
aea0bb4f TG |
495 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
496 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
497 | size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len; | |
498 | ||
499 | if (plen > 0) | |
500 | memset(skb_put(user_skb, plen), 0, plen); | |
501 | } | |
502 | ||
bda56f14 | 503 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 504 | |
bda56f14 | 505 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 506 | user_skb = NULL; |
ccb1352e | 507 | out: |
36d5fe6a ZK |
508 | if (err) |
509 | skb_tx_error(skb); | |
4ee45ea0 | 510 | kfree_skb(user_skb); |
ccb1352e JG |
511 | kfree_skb(nskb); |
512 | return err; | |
513 | } | |
514 | ||
ccb1352e JG |
515 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
516 | { | |
517 | struct ovs_header *ovs_header = info->userhdr; | |
518 | struct nlattr **a = info->attrs; | |
519 | struct sw_flow_actions *acts; | |
520 | struct sk_buff *packet; | |
521 | struct sw_flow *flow; | |
d98612b8 | 522 | struct sw_flow_actions *sf_acts; |
ccb1352e JG |
523 | struct datapath *dp; |
524 | struct ethhdr *eth; | |
83c8df26 | 525 | struct vport *input_vport; |
ccb1352e JG |
526 | int len; |
527 | int err; | |
05da5898 | 528 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e JG |
529 | |
530 | err = -EINVAL; | |
531 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 532 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
533 | goto err; |
534 | ||
535 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
536 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
537 | err = -ENOMEM; | |
538 | if (!packet) | |
539 | goto err; | |
540 | skb_reserve(packet, NET_IP_ALIGN); | |
541 | ||
32686a9d | 542 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e JG |
543 | |
544 | skb_reset_mac_header(packet); | |
545 | eth = eth_hdr(packet); | |
546 | ||
547 | /* Normally, setting the skb 'protocol' field would be handled by a | |
548 | * call to eth_type_trans(), but it assumes there's a sending | |
549 | * device, which we may not have. */ | |
e5c5d22e | 550 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
551 | packet->protocol = eth->h_proto; |
552 | else | |
553 | packet->protocol = htons(ETH_P_802_2); | |
554 | ||
555 | /* Build an sw_flow for sending this packet. */ | |
23dabf88 | 556 | flow = ovs_flow_alloc(); |
ccb1352e JG |
557 | err = PTR_ERR(flow); |
558 | if (IS_ERR(flow)) | |
559 | goto err_kfree_skb; | |
560 | ||
83c8df26 | 561 | err = ovs_flow_key_extract_userspace(a[OVS_PACKET_ATTR_KEY], packet, |
05da5898 | 562 | &flow->key, log); |
ccb1352e JG |
563 | if (err) |
564 | goto err_flow_free; | |
565 | ||
e6445719 | 566 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 567 | &flow->key, &acts, log); |
74f84a57 PS |
568 | if (err) |
569 | goto err_flow_free; | |
ccb1352e | 570 | |
f5796684 | 571 | rcu_assign_pointer(flow->sf_acts, acts); |
f5796684 | 572 | OVS_CB(packet)->egress_tun_info = NULL; |
ccb1352e | 573 | packet->priority = flow->key.phy.priority; |
39c7caeb | 574 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
575 | |
576 | rcu_read_lock(); | |
cc3a5ae6 | 577 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
578 | err = -ENODEV; |
579 | if (!dp) | |
580 | goto err_unlock; | |
581 | ||
83c8df26 PS |
582 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
583 | if (!input_vport) | |
584 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
585 | ||
586 | if (!input_vport) | |
587 | goto err_unlock; | |
588 | ||
589 | OVS_CB(packet)->input_vport = input_vport; | |
d98612b8 | 590 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 591 | |
ccb1352e | 592 | local_bh_disable(); |
d98612b8 | 593 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
594 | local_bh_enable(); |
595 | rcu_read_unlock(); | |
596 | ||
03f0d916 | 597 | ovs_flow_free(flow, false); |
ccb1352e JG |
598 | return err; |
599 | ||
600 | err_unlock: | |
601 | rcu_read_unlock(); | |
602 | err_flow_free: | |
03f0d916 | 603 | ovs_flow_free(flow, false); |
ccb1352e JG |
604 | err_kfree_skb: |
605 | kfree_skb(packet); | |
606 | err: | |
607 | return err; | |
608 | } | |
609 | ||
610 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 611 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
612 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
613 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
614 | }; | |
615 | ||
4534de83 | 616 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e JG |
617 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
618 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
619 | .policy = packet_policy, | |
620 | .doit = ovs_packet_cmd_execute | |
621 | } | |
622 | }; | |
623 | ||
0c200ef9 PS |
624 | static struct genl_family dp_packet_genl_family = { |
625 | .id = GENL_ID_GENERATE, | |
626 | .hdrsize = sizeof(struct ovs_header), | |
627 | .name = OVS_PACKET_FAMILY, | |
628 | .version = OVS_PACKET_VERSION, | |
629 | .maxattr = OVS_PACKET_ATTR_MAX, | |
630 | .netnsok = true, | |
631 | .parallel_ops = true, | |
632 | .ops = dp_packet_genl_ops, | |
633 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
634 | }; | |
635 | ||
12eb18f7 | 636 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 637 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
638 | { |
639 | int i; | |
ccb1352e | 640 | |
1bd7116f AZ |
641 | memset(mega_stats, 0, sizeof(*mega_stats)); |
642 | ||
b637e498 | 643 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 644 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
645 | |
646 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 647 | |
ccb1352e JG |
648 | for_each_possible_cpu(i) { |
649 | const struct dp_stats_percpu *percpu_stats; | |
650 | struct dp_stats_percpu local_stats; | |
651 | unsigned int start; | |
652 | ||
653 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
654 | ||
655 | do { | |
57a7744e | 656 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 657 | local_stats = *percpu_stats; |
57a7744e | 658 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
659 | |
660 | stats->n_hit += local_stats.n_hit; | |
661 | stats->n_missed += local_stats.n_missed; | |
662 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 663 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
664 | } |
665 | } | |
666 | ||
c3ff8cfe TG |
667 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
668 | { | |
669 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
41af73e9 JS |
670 | + nla_total_size(ovs_key_attr_size()) /* OVS_FLOW_ATTR_KEY */ |
671 | + nla_total_size(ovs_key_attr_size()) /* OVS_FLOW_ATTR_MASK */ | |
c3ff8cfe TG |
672 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
673 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
674 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
675 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
676 | } | |
677 | ||
bb6f9a70 | 678 | /* Called with ovs_mutex or RCU read lock. */ |
ca7105f2 JS |
679 | static int ovs_flow_cmd_fill_match(const struct sw_flow *flow, |
680 | struct sk_buff *skb) | |
ccb1352e | 681 | { |
ccb1352e | 682 | struct nlattr *nla; |
ccb1352e JG |
683 | int err; |
684 | ||
03f0d916 | 685 | /* Fill flow key. */ |
ccb1352e JG |
686 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
687 | if (!nla) | |
ca7105f2 | 688 | return -EMSGSIZE; |
03f0d916 | 689 | |
e6445719 | 690 | err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb); |
03f0d916 | 691 | if (err) |
ca7105f2 JS |
692 | return err; |
693 | ||
03f0d916 AZ |
694 | nla_nest_end(skb, nla); |
695 | ||
ca7105f2 | 696 | /* Fill flow mask. */ |
03f0d916 AZ |
697 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); |
698 | if (!nla) | |
ca7105f2 | 699 | return -EMSGSIZE; |
03f0d916 | 700 | |
e6445719 | 701 | err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb); |
ccb1352e | 702 | if (err) |
ca7105f2 | 703 | return err; |
03f0d916 | 704 | |
ccb1352e | 705 | nla_nest_end(skb, nla); |
ca7105f2 JS |
706 | return 0; |
707 | } | |
708 | ||
709 | /* Called with ovs_mutex or RCU read lock. */ | |
710 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
711 | struct sk_buff *skb) | |
712 | { | |
713 | struct ovs_flow_stats stats; | |
714 | __be16 tcp_flags; | |
715 | unsigned long used; | |
ccb1352e | 716 | |
e298e505 | 717 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 718 | |
028d6a67 DM |
719 | if (used && |
720 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
ca7105f2 | 721 | return -EMSGSIZE; |
ccb1352e | 722 | |
028d6a67 | 723 | if (stats.n_packets && |
e298e505 | 724 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) |
ca7105f2 | 725 | return -EMSGSIZE; |
ccb1352e | 726 | |
e298e505 PS |
727 | if ((u8)ntohs(tcp_flags) && |
728 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
729 | return -EMSGSIZE; |
730 | ||
731 | return 0; | |
732 | } | |
733 | ||
734 | /* Called with ovs_mutex or RCU read lock. */ | |
735 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
736 | struct sk_buff *skb, int skb_orig_len) | |
737 | { | |
738 | struct nlattr *start; | |
739 | int err; | |
ccb1352e JG |
740 | |
741 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
742 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
743 | * Netlink but individual action lists can be longer than | |
744 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
745 | * The userspace caller can always fetch the actions separately if it | |
746 | * really wants them. (Most userspace callers in fact don't care.) | |
747 | * | |
748 | * This can only fail for dump operations because the skb is always | |
749 | * properly sized for single flows. | |
750 | */ | |
74f84a57 PS |
751 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
752 | if (start) { | |
d57170b1 PS |
753 | const struct sw_flow_actions *sf_acts; |
754 | ||
663efa36 | 755 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
756 | err = ovs_nla_put_actions(sf_acts->actions, |
757 | sf_acts->actions_len, skb); | |
0e9796b4 | 758 | |
74f84a57 PS |
759 | if (!err) |
760 | nla_nest_end(skb, start); | |
761 | else { | |
762 | if (skb_orig_len) | |
ca7105f2 | 763 | return err; |
74f84a57 PS |
764 | |
765 | nla_nest_cancel(skb, start); | |
766 | } | |
ca7105f2 JS |
767 | } else if (skb_orig_len) { |
768 | return -EMSGSIZE; | |
769 | } | |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
774 | /* Called with ovs_mutex or RCU read lock. */ | |
775 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
776 | struct sk_buff *skb, u32 portid, | |
777 | u32 seq, u32 flags, u8 cmd) | |
778 | { | |
779 | const int skb_orig_len = skb->len; | |
780 | struct ovs_header *ovs_header; | |
781 | int err; | |
782 | ||
783 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
784 | flags, cmd); | |
785 | if (!ovs_header) | |
786 | return -EMSGSIZE; | |
787 | ||
788 | ovs_header->dp_ifindex = dp_ifindex; | |
789 | ||
790 | err = ovs_flow_cmd_fill_match(flow, skb); | |
791 | if (err) | |
792 | goto error; | |
793 | ||
794 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
795 | if (err) | |
796 | goto error; | |
797 | ||
798 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
799 | if (err) | |
800 | goto error; | |
ccb1352e JG |
801 | |
802 | return genlmsg_end(skb, ovs_header); | |
803 | ||
ccb1352e JG |
804 | error: |
805 | genlmsg_cancel(skb, ovs_header); | |
806 | return err; | |
807 | } | |
808 | ||
0e9796b4 JR |
809 | /* May not be called with RCU read lock. */ |
810 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
fb5d1e9e JR |
811 | struct genl_info *info, |
812 | bool always) | |
ccb1352e | 813 | { |
fb5d1e9e | 814 | struct sk_buff *skb; |
ccb1352e | 815 | |
9b67aa4a | 816 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
817 | return NULL; |
818 | ||
0e9796b4 | 819 | skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL); |
fb5d1e9e JR |
820 | if (!skb) |
821 | return ERR_PTR(-ENOMEM); | |
822 | ||
823 | return skb; | |
ccb1352e JG |
824 | } |
825 | ||
0e9796b4 JR |
826 | /* Called with ovs_mutex. */ |
827 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
828 | int dp_ifindex, | |
829 | struct genl_info *info, u8 cmd, | |
830 | bool always) | |
ccb1352e JG |
831 | { |
832 | struct sk_buff *skb; | |
833 | int retval; | |
834 | ||
0e9796b4 JR |
835 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info, |
836 | always); | |
d0e992aa | 837 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 838 | return skb; |
ccb1352e | 839 | |
0e9796b4 JR |
840 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
841 | info->snd_portid, info->snd_seq, 0, | |
842 | cmd); | |
ccb1352e JG |
843 | BUG_ON(retval < 0); |
844 | return skb; | |
845 | } | |
846 | ||
37bdc87b | 847 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e JG |
848 | { |
849 | struct nlattr **a = info->attrs; | |
850 | struct ovs_header *ovs_header = info->userhdr; | |
893f139b | 851 | struct sw_flow *flow, *new_flow; |
03f0d916 | 852 | struct sw_flow_mask mask; |
ccb1352e JG |
853 | struct sk_buff *reply; |
854 | struct datapath *dp; | |
37bdc87b | 855 | struct sw_flow_actions *acts; |
03f0d916 | 856 | struct sw_flow_match match; |
ccb1352e | 857 | int error; |
05da5898 | 858 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 859 | |
893f139b | 860 | /* Must have key and actions. */ |
ccb1352e | 861 | error = -EINVAL; |
426cda5c | 862 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 863 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 864 | goto error; |
426cda5c JG |
865 | } |
866 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 867 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 868 | goto error; |
426cda5c | 869 | } |
03f0d916 | 870 | |
893f139b JR |
871 | /* Most of the time we need to allocate a new flow, do it before |
872 | * locking. | |
873 | */ | |
874 | new_flow = ovs_flow_alloc(); | |
875 | if (IS_ERR(new_flow)) { | |
876 | error = PTR_ERR(new_flow); | |
877 | goto error; | |
878 | } | |
879 | ||
880 | /* Extract key. */ | |
881 | ovs_match_init(&match, &new_flow->unmasked_key, &mask); | |
05da5898 JR |
882 | error = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], |
883 | a[OVS_FLOW_ATTR_MASK], log); | |
ccb1352e | 884 | if (error) |
893f139b | 885 | goto err_kfree_flow; |
ccb1352e | 886 | |
893f139b | 887 | ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask); |
74f84a57 | 888 | |
893f139b | 889 | /* Validate actions. */ |
893f139b | 890 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key, |
05da5898 | 891 | &acts, log); |
37bdc87b | 892 | if (error) { |
05da5898 | 893 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 894 | goto err_kfree_flow; |
893f139b JR |
895 | } |
896 | ||
897 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
898 | if (IS_ERR(reply)) { | |
899 | error = PTR_ERR(reply); | |
900 | goto err_kfree_acts; | |
ccb1352e JG |
901 | } |
902 | ||
8e4e1713 | 903 | ovs_lock(); |
46df7b81 | 904 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
893f139b JR |
905 | if (unlikely(!dp)) { |
906 | error = -ENODEV; | |
8e4e1713 | 907 | goto err_unlock_ovs; |
893f139b | 908 | } |
03f0d916 | 909 | /* Check if this is a duplicate flow */ |
893f139b JR |
910 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key); |
911 | if (likely(!flow)) { | |
912 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
913 | |
914 | /* Put flow in bucket. */ | |
893f139b JR |
915 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
916 | if (unlikely(error)) { | |
618ed0c8 | 917 | acts = NULL; |
893f139b JR |
918 | goto err_unlock_ovs; |
919 | } | |
920 | ||
921 | if (unlikely(reply)) { | |
922 | error = ovs_flow_cmd_fill_info(new_flow, | |
923 | ovs_header->dp_ifindex, | |
924 | reply, info->snd_portid, | |
925 | info->snd_seq, 0, | |
926 | OVS_FLOW_CMD_NEW); | |
927 | BUG_ON(error < 0); | |
618ed0c8 | 928 | } |
893f139b | 929 | ovs_unlock(); |
ccb1352e | 930 | } else { |
37bdc87b JR |
931 | struct sw_flow_actions *old_acts; |
932 | ||
ccb1352e JG |
933 | /* Bail out if we're not allowed to modify an existing flow. |
934 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
935 | * because Generic Netlink treats the latter as a dump | |
936 | * request. We also accept NLM_F_EXCL in case that bug ever | |
937 | * gets fixed. | |
938 | */ | |
893f139b JR |
939 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
940 | | NLM_F_EXCL))) { | |
941 | error = -EEXIST; | |
8e4e1713 | 942 | goto err_unlock_ovs; |
893f139b | 943 | } |
03f0d916 | 944 | /* The unmasked key has to be the same for flow updates. */ |
893f139b | 945 | if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) { |
05da5898 | 946 | /* Look for any overlapping flow. */ |
4a46b24e AW |
947 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
948 | if (!flow) { | |
949 | error = -ENOENT; | |
950 | goto err_unlock_ovs; | |
951 | } | |
893f139b | 952 | } |
37bdc87b JR |
953 | /* Update actions. */ |
954 | old_acts = ovsl_dereference(flow->sf_acts); | |
955 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 956 | |
893f139b JR |
957 | if (unlikely(reply)) { |
958 | error = ovs_flow_cmd_fill_info(flow, | |
959 | ovs_header->dp_ifindex, | |
960 | reply, info->snd_portid, | |
961 | info->snd_seq, 0, | |
962 | OVS_FLOW_CMD_NEW); | |
963 | BUG_ON(error < 0); | |
964 | } | |
965 | ovs_unlock(); | |
37bdc87b | 966 | |
893f139b JR |
967 | ovs_nla_free_flow_actions(old_acts); |
968 | ovs_flow_free(new_flow, false); | |
37bdc87b | 969 | } |
893f139b JR |
970 | |
971 | if (reply) | |
972 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
973 | return 0; |
974 | ||
37bdc87b JR |
975 | err_unlock_ovs: |
976 | ovs_unlock(); | |
893f139b JR |
977 | kfree_skb(reply); |
978 | err_kfree_acts: | |
37bdc87b | 979 | kfree(acts); |
893f139b JR |
980 | err_kfree_flow: |
981 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
982 | error: |
983 | return error; | |
984 | } | |
ccb1352e | 985 | |
2fdb957d | 986 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
6b205b2c JG |
987 | static struct sw_flow_actions *get_flow_actions(const struct nlattr *a, |
988 | const struct sw_flow_key *key, | |
05da5898 JR |
989 | const struct sw_flow_mask *mask, |
990 | bool log) | |
6b205b2c JG |
991 | { |
992 | struct sw_flow_actions *acts; | |
993 | struct sw_flow_key masked_key; | |
994 | int error; | |
995 | ||
6b205b2c | 996 | ovs_flow_mask_key(&masked_key, key, mask); |
05da5898 | 997 | error = ovs_nla_copy_actions(a, &masked_key, &acts, log); |
6b205b2c | 998 | if (error) { |
05da5898 JR |
999 | OVS_NLERR(log, |
1000 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1001 | return ERR_PTR(error); |
1002 | } | |
1003 | ||
1004 | return acts; | |
1005 | } | |
1006 | ||
37bdc87b JR |
1007 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1008 | { | |
1009 | struct nlattr **a = info->attrs; | |
1010 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1011 | struct sw_flow_key key; |
37bdc87b JR |
1012 | struct sw_flow *flow; |
1013 | struct sw_flow_mask mask; | |
1014 | struct sk_buff *reply = NULL; | |
1015 | struct datapath *dp; | |
893f139b | 1016 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b JR |
1017 | struct sw_flow_match match; |
1018 | int error; | |
05da5898 | 1019 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
37bdc87b JR |
1020 | |
1021 | /* Extract key. */ | |
1022 | error = -EINVAL; | |
426cda5c | 1023 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 1024 | OVS_NLERR(log, "Flow key attribute not present in set flow."); |
37bdc87b | 1025 | goto error; |
426cda5c | 1026 | } |
37bdc87b JR |
1027 | |
1028 | ovs_match_init(&match, &key, &mask); | |
05da5898 JR |
1029 | error = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], |
1030 | a[OVS_FLOW_ATTR_MASK], log); | |
37bdc87b JR |
1031 | if (error) |
1032 | goto error; | |
1033 | ||
1034 | /* Validate actions. */ | |
1035 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 JR |
1036 | acts = get_flow_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, &mask, |
1037 | log); | |
6b205b2c JG |
1038 | if (IS_ERR(acts)) { |
1039 | error = PTR_ERR(acts); | |
37bdc87b | 1040 | goto error; |
893f139b | 1041 | } |
893f139b | 1042 | |
2fdb957d | 1043 | /* Can allocate before locking if have acts. */ |
893f139b JR |
1044 | reply = ovs_flow_cmd_alloc_info(acts, info, false); |
1045 | if (IS_ERR(reply)) { | |
1046 | error = PTR_ERR(reply); | |
1047 | goto err_kfree_acts; | |
be52c9e9 | 1048 | } |
37bdc87b | 1049 | } |
0e9796b4 | 1050 | |
37bdc87b JR |
1051 | ovs_lock(); |
1052 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
893f139b JR |
1053 | if (unlikely(!dp)) { |
1054 | error = -ENODEV; | |
37bdc87b | 1055 | goto err_unlock_ovs; |
893f139b | 1056 | } |
37bdc87b | 1057 | /* Check that the flow exists. */ |
4a46b24e | 1058 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
893f139b JR |
1059 | if (unlikely(!flow)) { |
1060 | error = -ENOENT; | |
37bdc87b | 1061 | goto err_unlock_ovs; |
893f139b | 1062 | } |
4a46b24e | 1063 | |
37bdc87b | 1064 | /* Update actions, if present. */ |
893f139b | 1065 | if (likely(acts)) { |
37bdc87b JR |
1066 | old_acts = ovsl_dereference(flow->sf_acts); |
1067 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1068 | |
1069 | if (unlikely(reply)) { | |
1070 | error = ovs_flow_cmd_fill_info(flow, | |
1071 | ovs_header->dp_ifindex, | |
1072 | reply, info->snd_portid, | |
1073 | info->snd_seq, 0, | |
1074 | OVS_FLOW_CMD_NEW); | |
1075 | BUG_ON(error < 0); | |
1076 | } | |
1077 | } else { | |
1078 | /* Could not alloc without acts before locking. */ | |
1079 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
1080 | info, OVS_FLOW_CMD_NEW, false); | |
1081 | if (unlikely(IS_ERR(reply))) { | |
1082 | error = PTR_ERR(reply); | |
1083 | goto err_unlock_ovs; | |
1084 | } | |
ccb1352e | 1085 | } |
37bdc87b | 1086 | |
37bdc87b JR |
1087 | /* Clear stats. */ |
1088 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1089 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1090 | ovs_unlock(); |
ccb1352e | 1091 | |
893f139b JR |
1092 | if (reply) |
1093 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1094 | if (old_acts) | |
1095 | ovs_nla_free_flow_actions(old_acts); | |
fb5d1e9e | 1096 | |
ccb1352e JG |
1097 | return 0; |
1098 | ||
8e4e1713 PS |
1099 | err_unlock_ovs: |
1100 | ovs_unlock(); | |
893f139b JR |
1101 | kfree_skb(reply); |
1102 | err_kfree_acts: | |
74f84a57 | 1103 | kfree(acts); |
ccb1352e JG |
1104 | error: |
1105 | return error; | |
1106 | } | |
1107 | ||
1108 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1109 | { | |
1110 | struct nlattr **a = info->attrs; | |
1111 | struct ovs_header *ovs_header = info->userhdr; | |
1112 | struct sw_flow_key key; | |
1113 | struct sk_buff *reply; | |
1114 | struct sw_flow *flow; | |
1115 | struct datapath *dp; | |
03f0d916 | 1116 | struct sw_flow_match match; |
ccb1352e | 1117 | int err; |
05da5898 | 1118 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 1119 | |
03f0d916 | 1120 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 JR |
1121 | OVS_NLERR(log, |
1122 | "Flow get message rejected, Key attribute missing."); | |
ccb1352e | 1123 | return -EINVAL; |
03f0d916 AZ |
1124 | } |
1125 | ||
1126 | ovs_match_init(&match, &key, NULL); | |
05da5898 | 1127 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL, log); |
ccb1352e JG |
1128 | if (err) |
1129 | return err; | |
1130 | ||
8e4e1713 | 1131 | ovs_lock(); |
46df7b81 | 1132 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1133 | if (!dp) { |
1134 | err = -ENODEV; | |
1135 | goto unlock; | |
1136 | } | |
ccb1352e | 1137 | |
4a46b24e AW |
1138 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1139 | if (!flow) { | |
8e4e1713 PS |
1140 | err = -ENOENT; |
1141 | goto unlock; | |
1142 | } | |
ccb1352e | 1143 | |
0e9796b4 JR |
1144 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
1145 | OVS_FLOW_CMD_NEW, true); | |
8e4e1713 PS |
1146 | if (IS_ERR(reply)) { |
1147 | err = PTR_ERR(reply); | |
1148 | goto unlock; | |
1149 | } | |
ccb1352e | 1150 | |
8e4e1713 | 1151 | ovs_unlock(); |
ccb1352e | 1152 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1153 | unlock: |
1154 | ovs_unlock(); | |
1155 | return err; | |
ccb1352e JG |
1156 | } |
1157 | ||
1158 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1159 | { | |
1160 | struct nlattr **a = info->attrs; | |
1161 | struct ovs_header *ovs_header = info->userhdr; | |
1162 | struct sw_flow_key key; | |
1163 | struct sk_buff *reply; | |
1164 | struct sw_flow *flow; | |
1165 | struct datapath *dp; | |
03f0d916 | 1166 | struct sw_flow_match match; |
ccb1352e | 1167 | int err; |
05da5898 | 1168 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 1169 | |
aed06778 JR |
1170 | if (likely(a[OVS_FLOW_ATTR_KEY])) { |
1171 | ovs_match_init(&match, &key, NULL); | |
05da5898 JR |
1172 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL, |
1173 | log); | |
aed06778 JR |
1174 | if (unlikely(err)) |
1175 | return err; | |
1176 | } | |
1177 | ||
8e4e1713 | 1178 | ovs_lock(); |
46df7b81 | 1179 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1180 | if (unlikely(!dp)) { |
8e4e1713 PS |
1181 | err = -ENODEV; |
1182 | goto unlock; | |
1183 | } | |
46df7b81 | 1184 | |
aed06778 | 1185 | if (unlikely(!a[OVS_FLOW_ATTR_KEY])) { |
b637e498 | 1186 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1187 | goto unlock; |
1188 | } | |
03f0d916 | 1189 | |
4a46b24e AW |
1190 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1191 | if (unlikely(!flow)) { | |
8e4e1713 PS |
1192 | err = -ENOENT; |
1193 | goto unlock; | |
1194 | } | |
ccb1352e | 1195 | |
b637e498 | 1196 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1197 | ovs_unlock(); |
ccb1352e | 1198 | |
aed06778 JR |
1199 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
1200 | info, false); | |
1201 | if (likely(reply)) { | |
1202 | if (likely(!IS_ERR(reply))) { | |
1203 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1204 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1205 | reply, info->snd_portid, | |
1206 | info->snd_seq, 0, | |
1207 | OVS_FLOW_CMD_DEL); | |
1208 | rcu_read_unlock(); | |
1209 | BUG_ON(err < 0); | |
1210 | ||
1211 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1212 | } else { | |
1213 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1214 | } | |
fb5d1e9e | 1215 | } |
ccb1352e | 1216 | |
aed06778 | 1217 | ovs_flow_free(flow, true); |
ccb1352e | 1218 | return 0; |
8e4e1713 PS |
1219 | unlock: |
1220 | ovs_unlock(); | |
1221 | return err; | |
ccb1352e JG |
1222 | } |
1223 | ||
1224 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1225 | { | |
1226 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
b637e498 | 1227 | struct table_instance *ti; |
ccb1352e | 1228 | struct datapath *dp; |
ccb1352e | 1229 | |
d57170b1 | 1230 | rcu_read_lock(); |
cc3a5ae6 | 1231 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1232 | if (!dp) { |
d57170b1 | 1233 | rcu_read_unlock(); |
ccb1352e | 1234 | return -ENODEV; |
8e4e1713 | 1235 | } |
ccb1352e | 1236 | |
b637e498 | 1237 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1238 | for (;;) { |
1239 | struct sw_flow *flow; | |
1240 | u32 bucket, obj; | |
1241 | ||
1242 | bucket = cb->args[0]; | |
1243 | obj = cb->args[1]; | |
b637e498 | 1244 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1245 | if (!flow) |
1246 | break; | |
1247 | ||
0e9796b4 | 1248 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1249 | NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1250 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1251 | OVS_FLOW_CMD_NEW) < 0) | |
1252 | break; | |
1253 | ||
1254 | cb->args[0] = bucket; | |
1255 | cb->args[1] = obj; | |
1256 | } | |
d57170b1 | 1257 | rcu_read_unlock(); |
ccb1352e JG |
1258 | return skb->len; |
1259 | } | |
1260 | ||
0c200ef9 PS |
1261 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1262 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1263 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1264 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1265 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1266 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
0c200ef9 PS |
1267 | }; |
1268 | ||
48e48a70 | 1269 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e JG |
1270 | { .cmd = OVS_FLOW_CMD_NEW, |
1271 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1272 | .policy = flow_policy, | |
37bdc87b | 1273 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1274 | }, |
1275 | { .cmd = OVS_FLOW_CMD_DEL, | |
1276 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1277 | .policy = flow_policy, | |
1278 | .doit = ovs_flow_cmd_del | |
1279 | }, | |
1280 | { .cmd = OVS_FLOW_CMD_GET, | |
1281 | .flags = 0, /* OK for unprivileged users. */ | |
1282 | .policy = flow_policy, | |
1283 | .doit = ovs_flow_cmd_get, | |
1284 | .dumpit = ovs_flow_cmd_dump | |
1285 | }, | |
1286 | { .cmd = OVS_FLOW_CMD_SET, | |
1287 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1288 | .policy = flow_policy, | |
37bdc87b | 1289 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1290 | }, |
1291 | }; | |
1292 | ||
0c200ef9 | 1293 | static struct genl_family dp_flow_genl_family = { |
ccb1352e JG |
1294 | .id = GENL_ID_GENERATE, |
1295 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1296 | .name = OVS_FLOW_FAMILY, |
1297 | .version = OVS_FLOW_VERSION, | |
1298 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3a4e0d6a PS |
1299 | .netnsok = true, |
1300 | .parallel_ops = true, | |
0c200ef9 PS |
1301 | .ops = dp_flow_genl_ops, |
1302 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1303 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1304 | .n_mcgrps = 1, | |
ccb1352e JG |
1305 | }; |
1306 | ||
c3ff8cfe TG |
1307 | static size_t ovs_dp_cmd_msg_size(void) |
1308 | { | |
1309 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1310 | ||
1311 | msgsize += nla_total_size(IFNAMSIZ); | |
1312 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1bd7116f | 1313 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
45fb9c35 | 1314 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1315 | |
1316 | return msgsize; | |
1317 | } | |
1318 | ||
8ec609d8 | 1319 | /* Called with ovs_mutex. */ |
ccb1352e | 1320 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1321 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1322 | { |
1323 | struct ovs_header *ovs_header; | |
1324 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1325 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1326 | int err; |
1327 | ||
15e47304 | 1328 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1329 | flags, cmd); |
1330 | if (!ovs_header) | |
1331 | goto error; | |
1332 | ||
1333 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1334 | ||
ccb1352e | 1335 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1336 | if (err) |
1337 | goto nla_put_failure; | |
1338 | ||
1bd7116f AZ |
1339 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1340 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1341 | &dp_stats)) | |
1342 | goto nla_put_failure; | |
1343 | ||
1344 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1345 | sizeof(struct ovs_dp_megaflow_stats), | |
1346 | &dp_megaflow_stats)) | |
028d6a67 | 1347 | goto nla_put_failure; |
ccb1352e | 1348 | |
43d4be9c TG |
1349 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1350 | goto nla_put_failure; | |
1351 | ||
ccb1352e JG |
1352 | return genlmsg_end(skb, ovs_header); |
1353 | ||
1354 | nla_put_failure: | |
1355 | genlmsg_cancel(skb, ovs_header); | |
1356 | error: | |
1357 | return -EMSGSIZE; | |
1358 | } | |
1359 | ||
6093ae9a | 1360 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
ccb1352e | 1361 | { |
6093ae9a | 1362 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
ccb1352e JG |
1363 | } |
1364 | ||
bb6f9a70 | 1365 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1366 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1367 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1368 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1369 | { | |
1370 | struct datapath *dp; | |
1371 | ||
1372 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1373 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1374 | else { |
1375 | struct vport *vport; | |
1376 | ||
46df7b81 | 1377 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1378 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1379 | } |
1380 | return dp ? dp : ERR_PTR(-ENODEV); | |
1381 | } | |
1382 | ||
44da5ae5 TG |
1383 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1384 | { | |
1385 | struct datapath *dp; | |
1386 | ||
1387 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1388 | if (IS_ERR(dp)) |
44da5ae5 TG |
1389 | return; |
1390 | ||
1391 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1392 | dp->user_features = 0; | |
1393 | } | |
1394 | ||
12eb18f7 | 1395 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
43d4be9c TG |
1396 | { |
1397 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1398 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1399 | } | |
1400 | ||
ccb1352e JG |
1401 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1402 | { | |
1403 | struct nlattr **a = info->attrs; | |
1404 | struct vport_parms parms; | |
1405 | struct sk_buff *reply; | |
1406 | struct datapath *dp; | |
1407 | struct vport *vport; | |
46df7b81 | 1408 | struct ovs_net *ovs_net; |
15eac2a7 | 1409 | int err, i; |
ccb1352e JG |
1410 | |
1411 | err = -EINVAL; | |
1412 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1413 | goto err; | |
1414 | ||
6093ae9a JR |
1415 | reply = ovs_dp_cmd_alloc_info(info); |
1416 | if (!reply) | |
1417 | return -ENOMEM; | |
ccb1352e JG |
1418 | |
1419 | err = -ENOMEM; | |
1420 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1421 | if (dp == NULL) | |
6093ae9a | 1422 | goto err_free_reply; |
46df7b81 | 1423 | |
46df7b81 | 1424 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
ccb1352e JG |
1425 | |
1426 | /* Allocate table. */ | |
b637e498 PS |
1427 | err = ovs_flow_tbl_init(&dp->table); |
1428 | if (err) | |
ccb1352e JG |
1429 | goto err_free_dp; |
1430 | ||
1c213bd2 | 1431 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1432 | if (!dp->stats_percpu) { |
1433 | err = -ENOMEM; | |
1434 | goto err_destroy_table; | |
1435 | } | |
1436 | ||
15eac2a7 | 1437 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
e6445719 | 1438 | GFP_KERNEL); |
15eac2a7 PS |
1439 | if (!dp->ports) { |
1440 | err = -ENOMEM; | |
1441 | goto err_destroy_percpu; | |
1442 | } | |
1443 | ||
1444 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1445 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1446 | ||
ccb1352e JG |
1447 | /* Set up our datapath device. */ |
1448 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1449 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1450 | parms.options = NULL; | |
1451 | parms.dp = dp; | |
1452 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1453 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1454 | |
43d4be9c TG |
1455 | ovs_dp_change(dp, a); |
1456 | ||
6093ae9a JR |
1457 | /* So far only local changes have been made, now need the lock. */ |
1458 | ovs_lock(); | |
1459 | ||
ccb1352e JG |
1460 | vport = new_vport(&parms); |
1461 | if (IS_ERR(vport)) { | |
1462 | err = PTR_ERR(vport); | |
1463 | if (err == -EBUSY) | |
1464 | err = -EEXIST; | |
1465 | ||
44da5ae5 TG |
1466 | if (err == -EEXIST) { |
1467 | /* An outdated user space instance that does not understand | |
1468 | * the concept of user_features has attempted to create a new | |
1469 | * datapath and is likely to reuse it. Drop all user features. | |
1470 | */ | |
1471 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1472 | ovs_dp_reset_user_features(skb, info); | |
1473 | } | |
1474 | ||
15eac2a7 | 1475 | goto err_destroy_ports_array; |
ccb1352e JG |
1476 | } |
1477 | ||
6093ae9a JR |
1478 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1479 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1480 | BUG_ON(err < 0); | |
ccb1352e | 1481 | |
46df7b81 | 1482 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1483 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1484 | |
1485 | ovs_unlock(); | |
ccb1352e | 1486 | |
2a94fe48 | 1487 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1488 | return 0; |
1489 | ||
15eac2a7 | 1490 | err_destroy_ports_array: |
6093ae9a | 1491 | ovs_unlock(); |
15eac2a7 | 1492 | kfree(dp->ports); |
ccb1352e JG |
1493 | err_destroy_percpu: |
1494 | free_percpu(dp->stats_percpu); | |
1495 | err_destroy_table: | |
9b996e54 | 1496 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 1497 | err_free_dp: |
46df7b81 | 1498 | release_net(ovs_dp_get_net(dp)); |
ccb1352e | 1499 | kfree(dp); |
6093ae9a JR |
1500 | err_free_reply: |
1501 | kfree_skb(reply); | |
ccb1352e JG |
1502 | err: |
1503 | return err; | |
1504 | } | |
1505 | ||
8e4e1713 | 1506 | /* Called with ovs_mutex. */ |
46df7b81 | 1507 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1508 | { |
15eac2a7 | 1509 | int i; |
ccb1352e | 1510 | |
15eac2a7 PS |
1511 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1512 | struct vport *vport; | |
b67bfe0d | 1513 | struct hlist_node *n; |
15eac2a7 | 1514 | |
b67bfe0d | 1515 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1516 | if (vport->port_no != OVSP_LOCAL) |
1517 | ovs_dp_detach_port(vport); | |
1518 | } | |
ccb1352e | 1519 | |
59a35d60 | 1520 | list_del_rcu(&dp->list_node); |
ccb1352e | 1521 | |
8e4e1713 | 1522 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1523 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1524 | */ |
8e4e1713 | 1525 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1526 | |
e80857cc | 1527 | /* RCU destroy the flow table */ |
ccb1352e | 1528 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1529 | } |
1530 | ||
1531 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1532 | { | |
1533 | struct sk_buff *reply; | |
1534 | struct datapath *dp; | |
1535 | int err; | |
1536 | ||
6093ae9a JR |
1537 | reply = ovs_dp_cmd_alloc_info(info); |
1538 | if (!reply) | |
1539 | return -ENOMEM; | |
1540 | ||
8e4e1713 | 1541 | ovs_lock(); |
46df7b81 PS |
1542 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1543 | err = PTR_ERR(dp); | |
1544 | if (IS_ERR(dp)) | |
6093ae9a | 1545 | goto err_unlock_free; |
46df7b81 | 1546 | |
6093ae9a JR |
1547 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1548 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1549 | BUG_ON(err < 0); | |
46df7b81 PS |
1550 | |
1551 | __dp_destroy(dp); | |
8e4e1713 | 1552 | ovs_unlock(); |
ccb1352e | 1553 | |
2a94fe48 | 1554 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1555 | |
1556 | return 0; | |
6093ae9a JR |
1557 | |
1558 | err_unlock_free: | |
8e4e1713 | 1559 | ovs_unlock(); |
6093ae9a | 1560 | kfree_skb(reply); |
8e4e1713 | 1561 | return err; |
ccb1352e JG |
1562 | } |
1563 | ||
1564 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1565 | { | |
1566 | struct sk_buff *reply; | |
1567 | struct datapath *dp; | |
1568 | int err; | |
1569 | ||
6093ae9a JR |
1570 | reply = ovs_dp_cmd_alloc_info(info); |
1571 | if (!reply) | |
1572 | return -ENOMEM; | |
1573 | ||
8e4e1713 | 1574 | ovs_lock(); |
46df7b81 | 1575 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1576 | err = PTR_ERR(dp); |
ccb1352e | 1577 | if (IS_ERR(dp)) |
6093ae9a | 1578 | goto err_unlock_free; |
ccb1352e | 1579 | |
43d4be9c TG |
1580 | ovs_dp_change(dp, info->attrs); |
1581 | ||
6093ae9a JR |
1582 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1583 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1584 | BUG_ON(err < 0); | |
ccb1352e | 1585 | |
8e4e1713 | 1586 | ovs_unlock(); |
2a94fe48 | 1587 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1588 | |
1589 | return 0; | |
6093ae9a JR |
1590 | |
1591 | err_unlock_free: | |
8e4e1713 | 1592 | ovs_unlock(); |
6093ae9a | 1593 | kfree_skb(reply); |
8e4e1713 | 1594 | return err; |
ccb1352e JG |
1595 | } |
1596 | ||
1597 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1598 | { | |
1599 | struct sk_buff *reply; | |
1600 | struct datapath *dp; | |
8e4e1713 | 1601 | int err; |
ccb1352e | 1602 | |
6093ae9a JR |
1603 | reply = ovs_dp_cmd_alloc_info(info); |
1604 | if (!reply) | |
1605 | return -ENOMEM; | |
1606 | ||
8ec609d8 | 1607 | ovs_lock(); |
46df7b81 | 1608 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1609 | if (IS_ERR(dp)) { |
1610 | err = PTR_ERR(dp); | |
6093ae9a | 1611 | goto err_unlock_free; |
8e4e1713 | 1612 | } |
6093ae9a JR |
1613 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1614 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1615 | BUG_ON(err < 0); | |
8ec609d8 | 1616 | ovs_unlock(); |
ccb1352e JG |
1617 | |
1618 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1619 | |
6093ae9a | 1620 | err_unlock_free: |
8ec609d8 | 1621 | ovs_unlock(); |
6093ae9a | 1622 | kfree_skb(reply); |
8e4e1713 | 1623 | return err; |
ccb1352e JG |
1624 | } |
1625 | ||
1626 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1627 | { | |
46df7b81 | 1628 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1629 | struct datapath *dp; |
1630 | int skip = cb->args[0]; | |
1631 | int i = 0; | |
1632 | ||
8ec609d8 PS |
1633 | ovs_lock(); |
1634 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1635 | if (i >= skip && |
15e47304 | 1636 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1637 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1638 | OVS_DP_CMD_NEW) < 0) | |
1639 | break; | |
1640 | i++; | |
1641 | } | |
8ec609d8 | 1642 | ovs_unlock(); |
ccb1352e JG |
1643 | |
1644 | cb->args[0] = i; | |
1645 | ||
1646 | return skb->len; | |
1647 | } | |
1648 | ||
0c200ef9 PS |
1649 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1650 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1651 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1652 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1653 | }; | |
1654 | ||
48e48a70 | 1655 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e JG |
1656 | { .cmd = OVS_DP_CMD_NEW, |
1657 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1658 | .policy = datapath_policy, | |
1659 | .doit = ovs_dp_cmd_new | |
1660 | }, | |
1661 | { .cmd = OVS_DP_CMD_DEL, | |
1662 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1663 | .policy = datapath_policy, | |
1664 | .doit = ovs_dp_cmd_del | |
1665 | }, | |
1666 | { .cmd = OVS_DP_CMD_GET, | |
1667 | .flags = 0, /* OK for unprivileged users. */ | |
1668 | .policy = datapath_policy, | |
1669 | .doit = ovs_dp_cmd_get, | |
1670 | .dumpit = ovs_dp_cmd_dump | |
1671 | }, | |
1672 | { .cmd = OVS_DP_CMD_SET, | |
1673 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1674 | .policy = datapath_policy, | |
1675 | .doit = ovs_dp_cmd_set, | |
1676 | }, | |
1677 | }; | |
1678 | ||
0c200ef9 | 1679 | static struct genl_family dp_datapath_genl_family = { |
ccb1352e JG |
1680 | .id = GENL_ID_GENERATE, |
1681 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1682 | .name = OVS_DATAPATH_FAMILY, |
1683 | .version = OVS_DATAPATH_VERSION, | |
1684 | .maxattr = OVS_DP_ATTR_MAX, | |
3a4e0d6a PS |
1685 | .netnsok = true, |
1686 | .parallel_ops = true, | |
0c200ef9 PS |
1687 | .ops = dp_datapath_genl_ops, |
1688 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1689 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1690 | .n_mcgrps = 1, | |
ccb1352e JG |
1691 | }; |
1692 | ||
8e4e1713 | 1693 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1694 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1695 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1696 | { |
1697 | struct ovs_header *ovs_header; | |
1698 | struct ovs_vport_stats vport_stats; | |
1699 | int err; | |
1700 | ||
15e47304 | 1701 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1702 | flags, cmd); |
1703 | if (!ovs_header) | |
1704 | return -EMSGSIZE; | |
1705 | ||
1706 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1707 | ||
028d6a67 DM |
1708 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1709 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 AW |
1710 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
1711 | vport->ops->get_name(vport))) | |
028d6a67 | 1712 | goto nla_put_failure; |
ccb1352e JG |
1713 | |
1714 | ovs_vport_get_stats(vport, &vport_stats); | |
028d6a67 DM |
1715 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1716 | &vport_stats)) | |
1717 | goto nla_put_failure; | |
ccb1352e | 1718 | |
5cd667b0 AW |
1719 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1720 | goto nla_put_failure; | |
1721 | ||
ccb1352e JG |
1722 | err = ovs_vport_get_options(vport, skb); |
1723 | if (err == -EMSGSIZE) | |
1724 | goto error; | |
1725 | ||
1726 | return genlmsg_end(skb, ovs_header); | |
1727 | ||
1728 | nla_put_failure: | |
1729 | err = -EMSGSIZE; | |
1730 | error: | |
1731 | genlmsg_cancel(skb, ovs_header); | |
1732 | return err; | |
1733 | } | |
1734 | ||
6093ae9a JR |
1735 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1736 | { | |
1737 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1738 | } | |
1739 | ||
1740 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
15e47304 | 1741 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1742 | u32 seq, u8 cmd) |
1743 | { | |
1744 | struct sk_buff *skb; | |
1745 | int retval; | |
1746 | ||
1747 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1748 | if (!skb) | |
1749 | return ERR_PTR(-ENOMEM); | |
1750 | ||
15e47304 | 1751 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1752 | BUG_ON(retval < 0); |
1753 | ||
ccb1352e JG |
1754 | return skb; |
1755 | } | |
1756 | ||
8e4e1713 | 1757 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 1758 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 1759 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1760 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1761 | { | |
1762 | struct datapath *dp; | |
1763 | struct vport *vport; | |
1764 | ||
1765 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1766 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1767 | if (!vport) |
1768 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1769 | if (ovs_header->dp_ifindex && |
1770 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1771 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1772 | return vport; |
1773 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1774 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1775 | ||
1776 | if (port_no >= DP_MAX_PORTS) | |
1777 | return ERR_PTR(-EFBIG); | |
1778 | ||
46df7b81 | 1779 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1780 | if (!dp) |
1781 | return ERR_PTR(-ENODEV); | |
1782 | ||
8e4e1713 | 1783 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1784 | if (!vport) |
14408dba | 1785 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1786 | return vport; |
1787 | } else | |
1788 | return ERR_PTR(-EINVAL); | |
1789 | } | |
1790 | ||
1791 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
1792 | { | |
1793 | struct nlattr **a = info->attrs; | |
1794 | struct ovs_header *ovs_header = info->userhdr; | |
1795 | struct vport_parms parms; | |
1796 | struct sk_buff *reply; | |
1797 | struct vport *vport; | |
1798 | struct datapath *dp; | |
1799 | u32 port_no; | |
1800 | int err; | |
1801 | ||
ccb1352e JG |
1802 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1803 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a JR |
1804 | return -EINVAL; |
1805 | ||
1806 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1807 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1808 | if (port_no >= DP_MAX_PORTS) | |
1809 | return -EFBIG; | |
1810 | ||
1811 | reply = ovs_vport_cmd_alloc_info(); | |
1812 | if (!reply) | |
1813 | return -ENOMEM; | |
ccb1352e | 1814 | |
8e4e1713 | 1815 | ovs_lock(); |
62b9c8d0 | 1816 | restart: |
46df7b81 | 1817 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1818 | err = -ENODEV; |
1819 | if (!dp) | |
6093ae9a | 1820 | goto exit_unlock_free; |
ccb1352e | 1821 | |
6093ae9a | 1822 | if (port_no) { |
8e4e1713 | 1823 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1824 | err = -EBUSY; |
1825 | if (vport) | |
6093ae9a | 1826 | goto exit_unlock_free; |
ccb1352e JG |
1827 | } else { |
1828 | for (port_no = 1; ; port_no++) { | |
1829 | if (port_no >= DP_MAX_PORTS) { | |
1830 | err = -EFBIG; | |
6093ae9a | 1831 | goto exit_unlock_free; |
ccb1352e | 1832 | } |
8e4e1713 | 1833 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1834 | if (!vport) |
1835 | break; | |
1836 | } | |
1837 | } | |
1838 | ||
1839 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
1840 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1841 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
1842 | parms.dp = dp; | |
1843 | parms.port_no = port_no; | |
5cd667b0 | 1844 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
1845 | |
1846 | vport = new_vport(&parms); | |
1847 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
1848 | if (IS_ERR(vport)) { |
1849 | if (err == -EAGAIN) | |
1850 | goto restart; | |
6093ae9a | 1851 | goto exit_unlock_free; |
62b9c8d0 | 1852 | } |
ccb1352e | 1853 | |
6093ae9a JR |
1854 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1855 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1856 | BUG_ON(err < 0); | |
1857 | ovs_unlock(); | |
ed661185 | 1858 | |
2a94fe48 | 1859 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1860 | return 0; |
ccb1352e | 1861 | |
6093ae9a | 1862 | exit_unlock_free: |
8e4e1713 | 1863 | ovs_unlock(); |
6093ae9a | 1864 | kfree_skb(reply); |
ccb1352e JG |
1865 | return err; |
1866 | } | |
1867 | ||
1868 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1869 | { | |
1870 | struct nlattr **a = info->attrs; | |
1871 | struct sk_buff *reply; | |
1872 | struct vport *vport; | |
1873 | int err; | |
1874 | ||
6093ae9a JR |
1875 | reply = ovs_vport_cmd_alloc_info(); |
1876 | if (!reply) | |
1877 | return -ENOMEM; | |
1878 | ||
8e4e1713 | 1879 | ovs_lock(); |
46df7b81 | 1880 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1881 | err = PTR_ERR(vport); |
1882 | if (IS_ERR(vport)) | |
6093ae9a | 1883 | goto exit_unlock_free; |
ccb1352e | 1884 | |
ccb1352e | 1885 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 1886 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 1887 | err = -EINVAL; |
6093ae9a | 1888 | goto exit_unlock_free; |
a9341512 JG |
1889 | } |
1890 | ||
f44f3408 | 1891 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 1892 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 1893 | if (err) |
6093ae9a | 1894 | goto exit_unlock_free; |
f44f3408 | 1895 | } |
a9341512 | 1896 | |
5cd667b0 AW |
1897 | |
1898 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
1899 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
1900 | ||
1901 | err = ovs_vport_set_upcall_portids(vport, ids); | |
1902 | if (err) | |
1903 | goto exit_unlock_free; | |
1904 | } | |
ccb1352e | 1905 | |
a9341512 JG |
1906 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1907 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1908 | BUG_ON(err < 0); | |
ccb1352e | 1909 | |
8e4e1713 | 1910 | ovs_unlock(); |
2a94fe48 | 1911 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 1912 | return 0; |
ccb1352e | 1913 | |
6093ae9a | 1914 | exit_unlock_free: |
8e4e1713 | 1915 | ovs_unlock(); |
6093ae9a | 1916 | kfree_skb(reply); |
ccb1352e JG |
1917 | return err; |
1918 | } | |
1919 | ||
1920 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1921 | { | |
1922 | struct nlattr **a = info->attrs; | |
1923 | struct sk_buff *reply; | |
1924 | struct vport *vport; | |
1925 | int err; | |
1926 | ||
6093ae9a JR |
1927 | reply = ovs_vport_cmd_alloc_info(); |
1928 | if (!reply) | |
1929 | return -ENOMEM; | |
1930 | ||
8e4e1713 | 1931 | ovs_lock(); |
46df7b81 | 1932 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1933 | err = PTR_ERR(vport); |
1934 | if (IS_ERR(vport)) | |
6093ae9a | 1935 | goto exit_unlock_free; |
ccb1352e JG |
1936 | |
1937 | if (vport->port_no == OVSP_LOCAL) { | |
1938 | err = -EINVAL; | |
6093ae9a | 1939 | goto exit_unlock_free; |
ccb1352e JG |
1940 | } |
1941 | ||
6093ae9a JR |
1942 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1943 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
1944 | BUG_ON(err < 0); | |
ccb1352e | 1945 | ovs_dp_detach_port(vport); |
6093ae9a | 1946 | ovs_unlock(); |
ccb1352e | 1947 | |
2a94fe48 | 1948 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1949 | return 0; |
ccb1352e | 1950 | |
6093ae9a | 1951 | exit_unlock_free: |
8e4e1713 | 1952 | ovs_unlock(); |
6093ae9a | 1953 | kfree_skb(reply); |
ccb1352e JG |
1954 | return err; |
1955 | } | |
1956 | ||
1957 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1958 | { | |
1959 | struct nlattr **a = info->attrs; | |
1960 | struct ovs_header *ovs_header = info->userhdr; | |
1961 | struct sk_buff *reply; | |
1962 | struct vport *vport; | |
1963 | int err; | |
1964 | ||
6093ae9a JR |
1965 | reply = ovs_vport_cmd_alloc_info(); |
1966 | if (!reply) | |
1967 | return -ENOMEM; | |
1968 | ||
ccb1352e | 1969 | rcu_read_lock(); |
46df7b81 | 1970 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
1971 | err = PTR_ERR(vport); |
1972 | if (IS_ERR(vport)) | |
6093ae9a JR |
1973 | goto exit_unlock_free; |
1974 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
1975 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1976 | BUG_ON(err < 0); | |
ccb1352e JG |
1977 | rcu_read_unlock(); |
1978 | ||
1979 | return genlmsg_reply(reply, info); | |
1980 | ||
6093ae9a | 1981 | exit_unlock_free: |
ccb1352e | 1982 | rcu_read_unlock(); |
6093ae9a | 1983 | kfree_skb(reply); |
ccb1352e JG |
1984 | return err; |
1985 | } | |
1986 | ||
1987 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1988 | { | |
1989 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
1990 | struct datapath *dp; | |
15eac2a7 PS |
1991 | int bucket = cb->args[0], skip = cb->args[1]; |
1992 | int i, j = 0; | |
ccb1352e | 1993 | |
42ee19e2 | 1994 | rcu_read_lock(); |
cc3a5ae6 | 1995 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
1996 | if (!dp) { |
1997 | rcu_read_unlock(); | |
ccb1352e | 1998 | return -ENODEV; |
42ee19e2 | 1999 | } |
15eac2a7 | 2000 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2001 | struct vport *vport; |
15eac2a7 PS |
2002 | |
2003 | j = 0; | |
b67bfe0d | 2004 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2005 | if (j >= skip && |
2006 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 2007 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2008 | cb->nlh->nlmsg_seq, |
2009 | NLM_F_MULTI, | |
2010 | OVS_VPORT_CMD_NEW) < 0) | |
2011 | goto out; | |
2012 | ||
2013 | j++; | |
2014 | } | |
2015 | skip = 0; | |
ccb1352e | 2016 | } |
15eac2a7 | 2017 | out: |
ccb1352e JG |
2018 | rcu_read_unlock(); |
2019 | ||
15eac2a7 PS |
2020 | cb->args[0] = i; |
2021 | cb->args[1] = j; | |
ccb1352e | 2022 | |
15eac2a7 | 2023 | return skb->len; |
ccb1352e JG |
2024 | } |
2025 | ||
0c200ef9 PS |
2026 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2027 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2028 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2029 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2030 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2031 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2032 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2033 | }; | |
2034 | ||
48e48a70 | 2035 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e JG |
2036 | { .cmd = OVS_VPORT_CMD_NEW, |
2037 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2038 | .policy = vport_policy, | |
2039 | .doit = ovs_vport_cmd_new | |
2040 | }, | |
2041 | { .cmd = OVS_VPORT_CMD_DEL, | |
2042 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2043 | .policy = vport_policy, | |
2044 | .doit = ovs_vport_cmd_del | |
2045 | }, | |
2046 | { .cmd = OVS_VPORT_CMD_GET, | |
2047 | .flags = 0, /* OK for unprivileged users. */ | |
2048 | .policy = vport_policy, | |
2049 | .doit = ovs_vport_cmd_get, | |
2050 | .dumpit = ovs_vport_cmd_dump | |
2051 | }, | |
2052 | { .cmd = OVS_VPORT_CMD_SET, | |
2053 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2054 | .policy = vport_policy, | |
2055 | .doit = ovs_vport_cmd_set, | |
2056 | }, | |
2057 | }; | |
2058 | ||
0c200ef9 PS |
2059 | struct genl_family dp_vport_genl_family = { |
2060 | .id = GENL_ID_GENERATE, | |
2061 | .hdrsize = sizeof(struct ovs_header), | |
2062 | .name = OVS_VPORT_FAMILY, | |
2063 | .version = OVS_VPORT_VERSION, | |
2064 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2065 | .netnsok = true, | |
2066 | .parallel_ops = true, | |
2067 | .ops = dp_vport_genl_ops, | |
2068 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2069 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2070 | .n_mcgrps = 1, | |
ccb1352e JG |
2071 | }; |
2072 | ||
0c200ef9 PS |
2073 | static struct genl_family * const dp_genl_families[] = { |
2074 | &dp_datapath_genl_family, | |
2075 | &dp_vport_genl_family, | |
2076 | &dp_flow_genl_family, | |
2077 | &dp_packet_genl_family, | |
ccb1352e JG |
2078 | }; |
2079 | ||
2080 | static void dp_unregister_genl(int n_families) | |
2081 | { | |
2082 | int i; | |
2083 | ||
2084 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2085 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2086 | } |
2087 | ||
2088 | static int dp_register_genl(void) | |
2089 | { | |
ccb1352e JG |
2090 | int err; |
2091 | int i; | |
2092 | ||
ccb1352e | 2093 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2094 | |
0c200ef9 | 2095 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2096 | if (err) |
2097 | goto error; | |
ccb1352e JG |
2098 | } |
2099 | ||
2100 | return 0; | |
2101 | ||
2102 | error: | |
0c200ef9 | 2103 | dp_unregister_genl(i); |
ccb1352e JG |
2104 | return err; |
2105 | } | |
2106 | ||
46df7b81 PS |
2107 | static int __net_init ovs_init_net(struct net *net) |
2108 | { | |
2109 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2110 | ||
2111 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2112 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
46df7b81 PS |
2113 | return 0; |
2114 | } | |
2115 | ||
2116 | static void __net_exit ovs_exit_net(struct net *net) | |
2117 | { | |
46df7b81 | 2118 | struct datapath *dp, *dp_next; |
8e4e1713 | 2119 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
46df7b81 | 2120 | |
8e4e1713 | 2121 | ovs_lock(); |
46df7b81 PS |
2122 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2123 | __dp_destroy(dp); | |
8e4e1713 PS |
2124 | ovs_unlock(); |
2125 | ||
2126 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2127 | } |
2128 | ||
2129 | static struct pernet_operations ovs_net_ops = { | |
2130 | .init = ovs_init_net, | |
2131 | .exit = ovs_exit_net, | |
2132 | .id = &ovs_net_id, | |
2133 | .size = sizeof(struct ovs_net), | |
2134 | }; | |
2135 | ||
ccb1352e JG |
2136 | static int __init dp_init(void) |
2137 | { | |
ccb1352e JG |
2138 | int err; |
2139 | ||
3523b29b | 2140 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2141 | |
2142 | pr_info("Open vSwitch switching datapath\n"); | |
2143 | ||
971427f3 | 2144 | err = action_fifos_init(); |
ccb1352e JG |
2145 | if (err) |
2146 | goto error; | |
2147 | ||
971427f3 AZ |
2148 | err = ovs_internal_dev_rtnl_link_register(); |
2149 | if (err) | |
2150 | goto error_action_fifos_exit; | |
2151 | ||
5b9e7e16 JP |
2152 | err = ovs_flow_init(); |
2153 | if (err) | |
2154 | goto error_unreg_rtnl_link; | |
2155 | ||
ccb1352e JG |
2156 | err = ovs_vport_init(); |
2157 | if (err) | |
2158 | goto error_flow_exit; | |
2159 | ||
46df7b81 | 2160 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2161 | if (err) |
2162 | goto error_vport_exit; | |
2163 | ||
46df7b81 PS |
2164 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2165 | if (err) | |
2166 | goto error_netns_exit; | |
2167 | ||
62b9c8d0 TG |
2168 | err = ovs_netdev_init(); |
2169 | if (err) | |
2170 | goto error_unreg_notifier; | |
2171 | ||
ccb1352e JG |
2172 | err = dp_register_genl(); |
2173 | if (err < 0) | |
62b9c8d0 | 2174 | goto error_unreg_netdev; |
ccb1352e | 2175 | |
ccb1352e JG |
2176 | return 0; |
2177 | ||
62b9c8d0 TG |
2178 | error_unreg_netdev: |
2179 | ovs_netdev_exit(); | |
ccb1352e JG |
2180 | error_unreg_notifier: |
2181 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2182 | error_netns_exit: |
2183 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2184 | error_vport_exit: |
2185 | ovs_vport_exit(); | |
2186 | error_flow_exit: | |
2187 | ovs_flow_exit(); | |
5b9e7e16 JP |
2188 | error_unreg_rtnl_link: |
2189 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2190 | error_action_fifos_exit: |
2191 | action_fifos_exit(); | |
ccb1352e JG |
2192 | error: |
2193 | return err; | |
2194 | } | |
2195 | ||
2196 | static void dp_cleanup(void) | |
2197 | { | |
ccb1352e | 2198 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2199 | ovs_netdev_exit(); |
ccb1352e | 2200 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2201 | unregister_pernet_device(&ovs_net_ops); |
2202 | rcu_barrier(); | |
ccb1352e JG |
2203 | ovs_vport_exit(); |
2204 | ovs_flow_exit(); | |
5b9e7e16 | 2205 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2206 | action_fifos_exit(); |
ccb1352e JG |
2207 | } |
2208 | ||
2209 | module_init(dp_init); | |
2210 | module_exit(dp_cleanup); | |
2211 | ||
2212 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2213 | MODULE_LICENSE("GPL"); |