Commit | Line | Data |
---|---|---|
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 PS |
61 | int ovs_net_id __read_mostly; |
62 | ||
0c200ef9 PS |
63 | static struct genl_family dp_packet_genl_family; |
64 | static struct genl_family dp_flow_genl_family; | |
65 | static struct genl_family dp_datapath_genl_family; | |
66 | ||
48e48a70 | 67 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
68 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
69 | }; |
70 | ||
48e48a70 | 71 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
72 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
73 | }; |
74 | ||
48e48a70 | 75 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
76 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
77 | }; |
78 | ||
fb5d1e9e JR |
79 | /* Check if need to build a reply message. |
80 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
81 | static bool ovs_must_notify(struct genl_info *info, | |
82 | const struct genl_multicast_group *grp) | |
83 | { | |
84 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
85 | netlink_has_listeners(genl_info_net(info)->genl_sock, 0); | |
86 | } | |
87 | ||
68eb5503 | 88 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 89 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 90 | { |
68eb5503 | 91 | genl_notify(family, skb, genl_info_net(info), info->snd_portid, |
2a94fe48 | 92 | 0, info->nlhdr, GFP_KERNEL); |
ed661185 TG |
93 | } |
94 | ||
ccb1352e JG |
95 | /** |
96 | * DOC: Locking: | |
97 | * | |
8e4e1713 PS |
98 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
99 | * operations on vports, etc.), Writes to other state (flow table | |
100 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
101 | * by ovs_lock. | |
ccb1352e JG |
102 | * |
103 | * Reads are protected by RCU. | |
104 | * | |
105 | * There are a few special cases (mostly stats) that have their own | |
106 | * synchronization but they nest under all of above and don't interact with | |
107 | * each other. | |
8e4e1713 PS |
108 | * |
109 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
110 | */ |
111 | ||
8e4e1713 PS |
112 | static DEFINE_MUTEX(ovs_mutex); |
113 | ||
114 | void ovs_lock(void) | |
115 | { | |
116 | mutex_lock(&ovs_mutex); | |
117 | } | |
118 | ||
119 | void ovs_unlock(void) | |
120 | { | |
121 | mutex_unlock(&ovs_mutex); | |
122 | } | |
123 | ||
124 | #ifdef CONFIG_LOCKDEP | |
125 | int lockdep_ovsl_is_held(void) | |
126 | { | |
127 | if (debug_locks) | |
128 | return lockdep_is_held(&ovs_mutex); | |
129 | else | |
130 | return 1; | |
131 | } | |
132 | #endif | |
133 | ||
ccb1352e | 134 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 135 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
ccb1352e | 136 | const struct dp_upcall_info *); |
8055a89c | 137 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
ccb1352e JG |
138 | const struct dp_upcall_info *); |
139 | ||
8e4e1713 | 140 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 141 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
ccb1352e JG |
142 | { |
143 | struct datapath *dp = NULL; | |
144 | struct net_device *dev; | |
145 | ||
146 | rcu_read_lock(); | |
46df7b81 | 147 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
ccb1352e JG |
148 | if (dev) { |
149 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
150 | if (vport) | |
151 | dp = vport->dp; | |
152 | } | |
153 | rcu_read_unlock(); | |
154 | ||
155 | return dp; | |
156 | } | |
157 | ||
8e4e1713 | 158 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
443cd88c | 159 | static const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 160 | { |
8e4e1713 | 161 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
ccb1352e JG |
162 | return vport->ops->get_name(vport); |
163 | } | |
164 | ||
165 | static int get_dpifindex(struct datapath *dp) | |
166 | { | |
167 | struct vport *local; | |
168 | int ifindex; | |
169 | ||
170 | rcu_read_lock(); | |
171 | ||
15eac2a7 | 172 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 173 | if (local) |
cff63a52 | 174 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
ccb1352e JG |
175 | else |
176 | ifindex = 0; | |
177 | ||
178 | rcu_read_unlock(); | |
179 | ||
180 | return ifindex; | |
181 | } | |
182 | ||
183 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
184 | { | |
185 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
186 | ||
ccb1352e | 187 | free_percpu(dp->stats_percpu); |
46df7b81 | 188 | release_net(ovs_dp_get_net(dp)); |
15eac2a7 | 189 | kfree(dp->ports); |
ccb1352e JG |
190 | kfree(dp); |
191 | } | |
192 | ||
15eac2a7 PS |
193 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
194 | u16 port_no) | |
195 | { | |
196 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
197 | } | |
198 | ||
bb6f9a70 | 199 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
200 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
201 | { | |
202 | struct vport *vport; | |
15eac2a7 PS |
203 | struct hlist_head *head; |
204 | ||
205 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 206 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
207 | if (vport->port_no == port_no) |
208 | return vport; | |
209 | } | |
210 | return NULL; | |
211 | } | |
212 | ||
8e4e1713 | 213 | /* Called with ovs_mutex. */ |
ccb1352e JG |
214 | static struct vport *new_vport(const struct vport_parms *parms) |
215 | { | |
216 | struct vport *vport; | |
217 | ||
218 | vport = ovs_vport_add(parms); | |
219 | if (!IS_ERR(vport)) { | |
220 | struct datapath *dp = parms->dp; | |
15eac2a7 | 221 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 222 | |
15eac2a7 | 223 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 224 | } |
ccb1352e JG |
225 | return vport; |
226 | } | |
227 | ||
ccb1352e JG |
228 | void ovs_dp_detach_port(struct vport *p) |
229 | { | |
8e4e1713 | 230 | ASSERT_OVSL(); |
ccb1352e JG |
231 | |
232 | /* First drop references to device. */ | |
15eac2a7 | 233 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
234 | |
235 | /* Then destroy it. */ | |
236 | ovs_vport_del(p); | |
237 | } | |
238 | ||
239 | /* Must be called with rcu_read_lock. */ | |
240 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) | |
241 | { | |
242 | struct datapath *dp = p->dp; | |
243 | struct sw_flow *flow; | |
244 | struct dp_stats_percpu *stats; | |
245 | struct sw_flow_key key; | |
246 | u64 *stats_counter; | |
1bd7116f | 247 | u32 n_mask_hit; |
ccb1352e | 248 | int error; |
ccb1352e | 249 | |
404f2f10 | 250 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e JG |
251 | |
252 | /* Extract flow from 'skb' into 'key'. */ | |
03f0d916 | 253 | error = ovs_flow_extract(skb, p->port_no, &key); |
ccb1352e JG |
254 | if (unlikely(error)) { |
255 | kfree_skb(skb); | |
256 | return; | |
257 | } | |
258 | ||
259 | /* Look up flow. */ | |
5bb50632 | 260 | flow = ovs_flow_tbl_lookup_stats(&dp->table, &key, &n_mask_hit); |
ccb1352e JG |
261 | if (unlikely(!flow)) { |
262 | struct dp_upcall_info upcall; | |
263 | ||
264 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
265 | upcall.key = &key; | |
266 | upcall.userdata = NULL; | |
5cd667b0 | 267 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
ccb1352e JG |
268 | ovs_dp_upcall(dp, skb, &upcall); |
269 | consume_skb(skb); | |
270 | stats_counter = &stats->n_missed; | |
271 | goto out; | |
272 | } | |
273 | ||
274 | OVS_CB(skb)->flow = flow; | |
03f0d916 | 275 | OVS_CB(skb)->pkt_key = &key; |
ccb1352e | 276 | |
ad552007 | 277 | ovs_flow_stats_update(OVS_CB(skb)->flow, key.tp.flags, skb); |
ccb1352e | 278 | ovs_execute_actions(dp, skb); |
e298e505 | 279 | stats_counter = &stats->n_hit; |
ccb1352e JG |
280 | |
281 | out: | |
282 | /* Update datapath statistics. */ | |
df9d9fdf | 283 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 284 | (*stats_counter)++; |
1bd7116f | 285 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 286 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
287 | } |
288 | ||
ccb1352e | 289 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
46df7b81 | 290 | const struct dp_upcall_info *upcall_info) |
ccb1352e JG |
291 | { |
292 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
293 | int err; |
294 | ||
15e47304 | 295 | if (upcall_info->portid == 0) { |
ccb1352e JG |
296 | err = -ENOTCONN; |
297 | goto err; | |
298 | } | |
299 | ||
ccb1352e | 300 | if (!skb_is_gso(skb)) |
8055a89c | 301 | err = queue_userspace_packet(dp, skb, upcall_info); |
ccb1352e | 302 | else |
8055a89c | 303 | err = queue_gso_packets(dp, skb, upcall_info); |
ccb1352e JG |
304 | if (err) |
305 | goto err; | |
306 | ||
307 | return 0; | |
308 | ||
309 | err: | |
404f2f10 | 310 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 311 | |
df9d9fdf | 312 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 313 | stats->n_lost++; |
df9d9fdf | 314 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
315 | |
316 | return err; | |
317 | } | |
318 | ||
8055a89c | 319 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
ccb1352e JG |
320 | const struct dp_upcall_info *upcall_info) |
321 | { | |
a1b5d0dd | 322 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
ccb1352e JG |
323 | struct dp_upcall_info later_info; |
324 | struct sw_flow_key later_key; | |
325 | struct sk_buff *segs, *nskb; | |
326 | int err; | |
327 | ||
09c5e605 | 328 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
329 | if (IS_ERR(segs)) |
330 | return PTR_ERR(segs); | |
ccb1352e JG |
331 | |
332 | /* Queue all of the segments. */ | |
333 | skb = segs; | |
334 | do { | |
8055a89c | 335 | err = queue_userspace_packet(dp, skb, upcall_info); |
ccb1352e JG |
336 | if (err) |
337 | break; | |
338 | ||
a1b5d0dd | 339 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
ccb1352e JG |
340 | /* The initial flow key extracted by ovs_flow_extract() |
341 | * in this case is for a first fragment, so we need to | |
342 | * properly mark later fragments. | |
343 | */ | |
344 | later_key = *upcall_info->key; | |
345 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
346 | ||
347 | later_info = *upcall_info; | |
348 | later_info.key = &later_key; | |
349 | upcall_info = &later_info; | |
350 | } | |
351 | } while ((skb = skb->next)); | |
352 | ||
353 | /* Free all of the segments. */ | |
354 | skb = segs; | |
355 | do { | |
356 | nskb = skb->next; | |
357 | if (err) | |
358 | kfree_skb(skb); | |
359 | else | |
360 | consume_skb(skb); | |
361 | } while ((skb = nskb)); | |
362 | return err; | |
363 | } | |
364 | ||
c3ff8cfe TG |
365 | static size_t key_attr_size(void) |
366 | { | |
367 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
7d5437c7 PS |
368 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ |
369 | + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
370 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
371 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
372 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
373 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
374 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
375 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
c3ff8cfe TG |
376 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ |
377 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
378 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
379 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
380 | + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */ | |
381 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
382 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
383 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
384 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
385 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
386 | } | |
387 | ||
bda56f14 TG |
388 | static size_t upcall_msg_size(const struct nlattr *userdata, |
389 | unsigned int hdrlen) | |
c3ff8cfe TG |
390 | { |
391 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 392 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
c3ff8cfe TG |
393 | + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
394 | ||
395 | /* OVS_PACKET_ATTR_USERDATA */ | |
396 | if (userdata) | |
397 | size += NLA_ALIGN(userdata->nla_len); | |
398 | ||
399 | return size; | |
400 | } | |
401 | ||
8055a89c | 402 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
ccb1352e JG |
403 | const struct dp_upcall_info *upcall_info) |
404 | { | |
405 | struct ovs_header *upcall; | |
406 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 407 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 408 | struct nlattr *nla; |
795449d8 | 409 | struct genl_info info = { |
8055a89c | 410 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
795449d8 TG |
411 | .snd_portid = upcall_info->portid, |
412 | }; | |
413 | size_t len; | |
bda56f14 | 414 | unsigned int hlen; |
8055a89c TG |
415 | int err, dp_ifindex; |
416 | ||
417 | dp_ifindex = get_dpifindex(dp); | |
418 | if (!dp_ifindex) | |
419 | return -ENODEV; | |
ccb1352e JG |
420 | |
421 | if (vlan_tx_tag_present(skb)) { | |
422 | nskb = skb_clone(skb, GFP_ATOMIC); | |
423 | if (!nskb) | |
424 | return -ENOMEM; | |
425 | ||
86a9bad3 | 426 | nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb)); |
8aa51d64 | 427 | if (!nskb) |
ccb1352e JG |
428 | return -ENOMEM; |
429 | ||
430 | nskb->vlan_tci = 0; | |
431 | skb = nskb; | |
432 | } | |
433 | ||
434 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
435 | err = -EFBIG; | |
436 | goto out; | |
437 | } | |
438 | ||
bda56f14 TG |
439 | /* Complete checksum if needed */ |
440 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
441 | (err = skb_checksum_help(skb))) | |
442 | goto out; | |
443 | ||
444 | /* Older versions of OVS user space enforce alignment of the last | |
445 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
446 | * padding logic. Only perform zerocopy if padding is not required. | |
447 | */ | |
448 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
449 | hlen = skb_zerocopy_headlen(skb); | |
450 | else | |
451 | hlen = skb->len; | |
452 | ||
453 | len = upcall_msg_size(upcall_info->userdata, hlen); | |
795449d8 | 454 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
ccb1352e JG |
455 | if (!user_skb) { |
456 | err = -ENOMEM; | |
457 | goto out; | |
458 | } | |
459 | ||
460 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
461 | 0, upcall_info->cmd); | |
462 | upcall->dp_ifindex = dp_ifindex; | |
463 | ||
464 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
f53e3831 AZ |
465 | err = ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb); |
466 | BUG_ON(err); | |
ccb1352e JG |
467 | nla_nest_end(user_skb, nla); |
468 | ||
469 | if (upcall_info->userdata) | |
4490108b BP |
470 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
471 | nla_len(upcall_info->userdata), | |
472 | nla_data(upcall_info->userdata)); | |
ccb1352e | 473 | |
bda56f14 TG |
474 | /* Only reserve room for attribute header, packet data is added |
475 | * in skb_zerocopy() */ | |
476 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
477 | err = -ENOBUFS; | |
478 | goto out; | |
479 | } | |
480 | nla->nla_len = nla_attr_size(skb->len); | |
ccb1352e | 481 | |
36d5fe6a ZK |
482 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
483 | if (err) | |
484 | goto out; | |
ccb1352e | 485 | |
aea0bb4f TG |
486 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
487 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
488 | size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len; | |
489 | ||
490 | if (plen > 0) | |
491 | memset(skb_put(user_skb, plen), 0, plen); | |
492 | } | |
493 | ||
bda56f14 | 494 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 495 | |
bda56f14 | 496 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 497 | user_skb = NULL; |
ccb1352e | 498 | out: |
36d5fe6a ZK |
499 | if (err) |
500 | skb_tx_error(skb); | |
4ee45ea0 | 501 | kfree_skb(user_skb); |
ccb1352e JG |
502 | kfree_skb(nskb); |
503 | return err; | |
504 | } | |
505 | ||
ccb1352e JG |
506 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
507 | { | |
508 | struct ovs_header *ovs_header = info->userhdr; | |
509 | struct nlattr **a = info->attrs; | |
510 | struct sw_flow_actions *acts; | |
511 | struct sk_buff *packet; | |
512 | struct sw_flow *flow; | |
513 | struct datapath *dp; | |
514 | struct ethhdr *eth; | |
515 | int len; | |
516 | int err; | |
ccb1352e JG |
517 | |
518 | err = -EINVAL; | |
519 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 520 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
521 | goto err; |
522 | ||
523 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
524 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
525 | err = -ENOMEM; | |
526 | if (!packet) | |
527 | goto err; | |
528 | skb_reserve(packet, NET_IP_ALIGN); | |
529 | ||
32686a9d | 530 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e JG |
531 | |
532 | skb_reset_mac_header(packet); | |
533 | eth = eth_hdr(packet); | |
534 | ||
535 | /* Normally, setting the skb 'protocol' field would be handled by a | |
536 | * call to eth_type_trans(), but it assumes there's a sending | |
537 | * device, which we may not have. */ | |
e5c5d22e | 538 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
539 | packet->protocol = eth->h_proto; |
540 | else | |
541 | packet->protocol = htons(ETH_P_802_2); | |
542 | ||
543 | /* Build an sw_flow for sending this packet. */ | |
23dabf88 | 544 | flow = ovs_flow_alloc(); |
ccb1352e JG |
545 | err = PTR_ERR(flow); |
546 | if (IS_ERR(flow)) | |
547 | goto err_kfree_skb; | |
548 | ||
03f0d916 | 549 | err = ovs_flow_extract(packet, -1, &flow->key); |
ccb1352e JG |
550 | if (err) |
551 | goto err_flow_free; | |
552 | ||
e6445719 | 553 | err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]); |
ccb1352e JG |
554 | if (err) |
555 | goto err_flow_free; | |
e6445719 | 556 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
ccb1352e JG |
557 | err = PTR_ERR(acts); |
558 | if (IS_ERR(acts)) | |
559 | goto err_flow_free; | |
74f84a57 | 560 | |
e6445719 PS |
561 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
562 | &flow->key, 0, &acts); | |
ccb1352e | 563 | rcu_assign_pointer(flow->sf_acts, acts); |
74f84a57 PS |
564 | if (err) |
565 | goto err_flow_free; | |
ccb1352e JG |
566 | |
567 | OVS_CB(packet)->flow = flow; | |
03f0d916 | 568 | OVS_CB(packet)->pkt_key = &flow->key; |
ccb1352e | 569 | packet->priority = flow->key.phy.priority; |
39c7caeb | 570 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
571 | |
572 | rcu_read_lock(); | |
46df7b81 | 573 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
574 | err = -ENODEV; |
575 | if (!dp) | |
576 | goto err_unlock; | |
577 | ||
578 | local_bh_disable(); | |
579 | err = ovs_execute_actions(dp, packet); | |
580 | local_bh_enable(); | |
581 | rcu_read_unlock(); | |
582 | ||
03f0d916 | 583 | ovs_flow_free(flow, false); |
ccb1352e JG |
584 | return err; |
585 | ||
586 | err_unlock: | |
587 | rcu_read_unlock(); | |
588 | err_flow_free: | |
03f0d916 | 589 | ovs_flow_free(flow, false); |
ccb1352e JG |
590 | err_kfree_skb: |
591 | kfree_skb(packet); | |
592 | err: | |
593 | return err; | |
594 | } | |
595 | ||
596 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 597 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
598 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
599 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
600 | }; | |
601 | ||
4534de83 | 602 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e JG |
603 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
604 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
605 | .policy = packet_policy, | |
606 | .doit = ovs_packet_cmd_execute | |
607 | } | |
608 | }; | |
609 | ||
0c200ef9 PS |
610 | static struct genl_family dp_packet_genl_family = { |
611 | .id = GENL_ID_GENERATE, | |
612 | .hdrsize = sizeof(struct ovs_header), | |
613 | .name = OVS_PACKET_FAMILY, | |
614 | .version = OVS_PACKET_VERSION, | |
615 | .maxattr = OVS_PACKET_ATTR_MAX, | |
616 | .netnsok = true, | |
617 | .parallel_ops = true, | |
618 | .ops = dp_packet_genl_ops, | |
619 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
620 | }; | |
621 | ||
1bd7116f AZ |
622 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats, |
623 | struct ovs_dp_megaflow_stats *mega_stats) | |
ccb1352e JG |
624 | { |
625 | int i; | |
ccb1352e | 626 | |
1bd7116f AZ |
627 | memset(mega_stats, 0, sizeof(*mega_stats)); |
628 | ||
b637e498 | 629 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 630 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
631 | |
632 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 633 | |
ccb1352e JG |
634 | for_each_possible_cpu(i) { |
635 | const struct dp_stats_percpu *percpu_stats; | |
636 | struct dp_stats_percpu local_stats; | |
637 | unsigned int start; | |
638 | ||
639 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
640 | ||
641 | do { | |
57a7744e | 642 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 643 | local_stats = *percpu_stats; |
57a7744e | 644 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
645 | |
646 | stats->n_hit += local_stats.n_hit; | |
647 | stats->n_missed += local_stats.n_missed; | |
648 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 649 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
650 | } |
651 | } | |
652 | ||
c3ff8cfe TG |
653 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
654 | { | |
655 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
656 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
03f0d916 | 657 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */ |
c3ff8cfe TG |
658 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
659 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
660 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
661 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
662 | } | |
663 | ||
bb6f9a70 | 664 | /* Called with ovs_mutex or RCU read lock. */ |
0e9796b4 | 665 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
15e47304 | 666 | struct sk_buff *skb, u32 portid, |
ccb1352e JG |
667 | u32 seq, u32 flags, u8 cmd) |
668 | { | |
669 | const int skb_orig_len = skb->len; | |
74f84a57 | 670 | struct nlattr *start; |
ccb1352e | 671 | struct ovs_flow_stats stats; |
e298e505 PS |
672 | __be16 tcp_flags; |
673 | unsigned long used; | |
ccb1352e JG |
674 | struct ovs_header *ovs_header; |
675 | struct nlattr *nla; | |
ccb1352e JG |
676 | int err; |
677 | ||
15e47304 | 678 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
ccb1352e JG |
679 | if (!ovs_header) |
680 | return -EMSGSIZE; | |
681 | ||
0e9796b4 | 682 | ovs_header->dp_ifindex = dp_ifindex; |
ccb1352e | 683 | |
03f0d916 | 684 | /* Fill flow key. */ |
ccb1352e JG |
685 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
686 | if (!nla) | |
687 | goto nla_put_failure; | |
03f0d916 | 688 | |
e6445719 | 689 | err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb); |
03f0d916 AZ |
690 | if (err) |
691 | goto error; | |
692 | nla_nest_end(skb, nla); | |
693 | ||
694 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); | |
695 | if (!nla) | |
696 | goto nla_put_failure; | |
697 | ||
e6445719 | 698 | err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb); |
ccb1352e JG |
699 | if (err) |
700 | goto error; | |
03f0d916 | 701 | |
ccb1352e JG |
702 | nla_nest_end(skb, nla); |
703 | ||
e298e505 | 704 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 705 | |
028d6a67 DM |
706 | if (used && |
707 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
708 | goto nla_put_failure; | |
ccb1352e | 709 | |
028d6a67 | 710 | if (stats.n_packets && |
e298e505 | 711 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) |
028d6a67 | 712 | goto nla_put_failure; |
ccb1352e | 713 | |
e298e505 PS |
714 | if ((u8)ntohs(tcp_flags) && |
715 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
028d6a67 | 716 | goto nla_put_failure; |
ccb1352e JG |
717 | |
718 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
719 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
720 | * Netlink but individual action lists can be longer than | |
721 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
722 | * The userspace caller can always fetch the actions separately if it | |
723 | * really wants them. (Most userspace callers in fact don't care.) | |
724 | * | |
725 | * This can only fail for dump operations because the skb is always | |
726 | * properly sized for single flows. | |
727 | */ | |
74f84a57 PS |
728 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
729 | if (start) { | |
d57170b1 PS |
730 | const struct sw_flow_actions *sf_acts; |
731 | ||
663efa36 | 732 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
733 | err = ovs_nla_put_actions(sf_acts->actions, |
734 | sf_acts->actions_len, skb); | |
0e9796b4 | 735 | |
74f84a57 PS |
736 | if (!err) |
737 | nla_nest_end(skb, start); | |
738 | else { | |
739 | if (skb_orig_len) | |
740 | goto error; | |
741 | ||
742 | nla_nest_cancel(skb, start); | |
743 | } | |
744 | } else if (skb_orig_len) | |
745 | goto nla_put_failure; | |
ccb1352e JG |
746 | |
747 | return genlmsg_end(skb, ovs_header); | |
748 | ||
749 | nla_put_failure: | |
750 | err = -EMSGSIZE; | |
751 | error: | |
752 | genlmsg_cancel(skb, ovs_header); | |
753 | return err; | |
754 | } | |
755 | ||
0e9796b4 JR |
756 | /* May not be called with RCU read lock. */ |
757 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
fb5d1e9e JR |
758 | struct genl_info *info, |
759 | bool always) | |
ccb1352e | 760 | { |
fb5d1e9e | 761 | struct sk_buff *skb; |
ccb1352e | 762 | |
fb5d1e9e JR |
763 | if (!always && !ovs_must_notify(info, &ovs_dp_flow_multicast_group)) |
764 | return NULL; | |
765 | ||
0e9796b4 | 766 | skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL); |
fb5d1e9e JR |
767 | if (!skb) |
768 | return ERR_PTR(-ENOMEM); | |
769 | ||
770 | return skb; | |
ccb1352e JG |
771 | } |
772 | ||
0e9796b4 JR |
773 | /* Called with ovs_mutex. */ |
774 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
775 | int dp_ifindex, | |
776 | struct genl_info *info, u8 cmd, | |
777 | bool always) | |
ccb1352e JG |
778 | { |
779 | struct sk_buff *skb; | |
780 | int retval; | |
781 | ||
0e9796b4 JR |
782 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info, |
783 | always); | |
d0e992aa | 784 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 785 | return skb; |
ccb1352e | 786 | |
0e9796b4 JR |
787 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
788 | info->snd_portid, info->snd_seq, 0, | |
789 | cmd); | |
ccb1352e JG |
790 | BUG_ON(retval < 0); |
791 | return skb; | |
792 | } | |
793 | ||
37bdc87b | 794 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e JG |
795 | { |
796 | struct nlattr **a = info->attrs; | |
797 | struct ovs_header *ovs_header = info->userhdr; | |
893f139b | 798 | struct sw_flow *flow, *new_flow; |
03f0d916 | 799 | struct sw_flow_mask mask; |
ccb1352e JG |
800 | struct sk_buff *reply; |
801 | struct datapath *dp; | |
37bdc87b | 802 | struct sw_flow_actions *acts; |
03f0d916 | 803 | struct sw_flow_match match; |
ccb1352e | 804 | int error; |
ccb1352e | 805 | |
893f139b | 806 | /* Must have key and actions. */ |
ccb1352e JG |
807 | error = -EINVAL; |
808 | if (!a[OVS_FLOW_ATTR_KEY]) | |
809 | goto error; | |
893f139b JR |
810 | if (!a[OVS_FLOW_ATTR_ACTIONS]) |
811 | goto error; | |
03f0d916 | 812 | |
893f139b JR |
813 | /* Most of the time we need to allocate a new flow, do it before |
814 | * locking. | |
815 | */ | |
816 | new_flow = ovs_flow_alloc(); | |
817 | if (IS_ERR(new_flow)) { | |
818 | error = PTR_ERR(new_flow); | |
819 | goto error; | |
820 | } | |
821 | ||
822 | /* Extract key. */ | |
823 | ovs_match_init(&match, &new_flow->unmasked_key, &mask); | |
23dabf88 | 824 | error = ovs_nla_get_match(&match, |
e6445719 | 825 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); |
ccb1352e | 826 | if (error) |
893f139b | 827 | goto err_kfree_flow; |
ccb1352e | 828 | |
893f139b | 829 | ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask); |
74f84a57 | 830 | |
893f139b | 831 | /* Validate actions. */ |
37bdc87b JR |
832 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
833 | error = PTR_ERR(acts); | |
834 | if (IS_ERR(acts)) | |
893f139b | 835 | goto err_kfree_flow; |
37bdc87b | 836 | |
893f139b JR |
837 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key, |
838 | 0, &acts); | |
37bdc87b JR |
839 | if (error) { |
840 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
893f139b JR |
841 | goto err_kfree_acts; |
842 | } | |
843 | ||
844 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
845 | if (IS_ERR(reply)) { | |
846 | error = PTR_ERR(reply); | |
847 | goto err_kfree_acts; | |
ccb1352e JG |
848 | } |
849 | ||
8e4e1713 | 850 | ovs_lock(); |
46df7b81 | 851 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
893f139b JR |
852 | if (unlikely(!dp)) { |
853 | error = -ENODEV; | |
8e4e1713 | 854 | goto err_unlock_ovs; |
893f139b | 855 | } |
03f0d916 | 856 | /* Check if this is a duplicate flow */ |
893f139b JR |
857 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key); |
858 | if (likely(!flow)) { | |
859 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
860 | |
861 | /* Put flow in bucket. */ | |
893f139b JR |
862 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
863 | if (unlikely(error)) { | |
618ed0c8 | 864 | acts = NULL; |
893f139b JR |
865 | goto err_unlock_ovs; |
866 | } | |
867 | ||
868 | if (unlikely(reply)) { | |
869 | error = ovs_flow_cmd_fill_info(new_flow, | |
870 | ovs_header->dp_ifindex, | |
871 | reply, info->snd_portid, | |
872 | info->snd_seq, 0, | |
873 | OVS_FLOW_CMD_NEW); | |
874 | BUG_ON(error < 0); | |
618ed0c8 | 875 | } |
893f139b | 876 | ovs_unlock(); |
ccb1352e | 877 | } else { |
37bdc87b JR |
878 | struct sw_flow_actions *old_acts; |
879 | ||
ccb1352e JG |
880 | /* Bail out if we're not allowed to modify an existing flow. |
881 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
882 | * because Generic Netlink treats the latter as a dump | |
883 | * request. We also accept NLM_F_EXCL in case that bug ever | |
884 | * gets fixed. | |
885 | */ | |
893f139b JR |
886 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
887 | | NLM_F_EXCL))) { | |
888 | error = -EEXIST; | |
8e4e1713 | 889 | goto err_unlock_ovs; |
893f139b | 890 | } |
03f0d916 | 891 | /* The unmasked key has to be the same for flow updates. */ |
893f139b | 892 | if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) { |
4a46b24e AW |
893 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
894 | if (!flow) { | |
895 | error = -ENOENT; | |
896 | goto err_unlock_ovs; | |
897 | } | |
893f139b | 898 | } |
37bdc87b JR |
899 | /* Update actions. */ |
900 | old_acts = ovsl_dereference(flow->sf_acts); | |
901 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 902 | |
893f139b JR |
903 | if (unlikely(reply)) { |
904 | error = ovs_flow_cmd_fill_info(flow, | |
905 | ovs_header->dp_ifindex, | |
906 | reply, info->snd_portid, | |
907 | info->snd_seq, 0, | |
908 | OVS_FLOW_CMD_NEW); | |
909 | BUG_ON(error < 0); | |
910 | } | |
911 | ovs_unlock(); | |
37bdc87b | 912 | |
893f139b JR |
913 | ovs_nla_free_flow_actions(old_acts); |
914 | ovs_flow_free(new_flow, false); | |
37bdc87b | 915 | } |
893f139b JR |
916 | |
917 | if (reply) | |
918 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
919 | return 0; |
920 | ||
37bdc87b JR |
921 | err_unlock_ovs: |
922 | ovs_unlock(); | |
893f139b JR |
923 | kfree_skb(reply); |
924 | err_kfree_acts: | |
37bdc87b | 925 | kfree(acts); |
893f139b JR |
926 | err_kfree_flow: |
927 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
928 | error: |
929 | return error; | |
930 | } | |
ccb1352e | 931 | |
37bdc87b JR |
932 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
933 | { | |
934 | struct nlattr **a = info->attrs; | |
935 | struct ovs_header *ovs_header = info->userhdr; | |
936 | struct sw_flow_key key, masked_key; | |
937 | struct sw_flow *flow; | |
938 | struct sw_flow_mask mask; | |
939 | struct sk_buff *reply = NULL; | |
940 | struct datapath *dp; | |
893f139b | 941 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b JR |
942 | struct sw_flow_match match; |
943 | int error; | |
944 | ||
945 | /* Extract key. */ | |
946 | error = -EINVAL; | |
947 | if (!a[OVS_FLOW_ATTR_KEY]) | |
948 | goto error; | |
949 | ||
950 | ovs_match_init(&match, &key, &mask); | |
951 | error = ovs_nla_get_match(&match, | |
952 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); | |
953 | if (error) | |
954 | goto error; | |
955 | ||
956 | /* Validate actions. */ | |
957 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
958 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); | |
959 | error = PTR_ERR(acts); | |
960 | if (IS_ERR(acts)) | |
961 | goto error; | |
962 | ||
963 | ovs_flow_mask_key(&masked_key, &key, &mask); | |
964 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], | |
965 | &masked_key, 0, &acts); | |
966 | if (error) { | |
967 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
893f139b JR |
968 | goto err_kfree_acts; |
969 | } | |
970 | } | |
971 | ||
972 | /* Can allocate before locking if have acts. */ | |
973 | if (acts) { | |
974 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
975 | if (IS_ERR(reply)) { | |
976 | error = PTR_ERR(reply); | |
977 | goto err_kfree_acts; | |
be52c9e9 | 978 | } |
37bdc87b | 979 | } |
0e9796b4 | 980 | |
37bdc87b JR |
981 | ovs_lock(); |
982 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
893f139b JR |
983 | if (unlikely(!dp)) { |
984 | error = -ENODEV; | |
37bdc87b | 985 | goto err_unlock_ovs; |
893f139b | 986 | } |
37bdc87b | 987 | /* Check that the flow exists. */ |
4a46b24e | 988 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
893f139b JR |
989 | if (unlikely(!flow)) { |
990 | error = -ENOENT; | |
37bdc87b | 991 | goto err_unlock_ovs; |
893f139b | 992 | } |
4a46b24e | 993 | |
37bdc87b | 994 | /* Update actions, if present. */ |
893f139b | 995 | if (likely(acts)) { |
37bdc87b JR |
996 | old_acts = ovsl_dereference(flow->sf_acts); |
997 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
998 | |
999 | if (unlikely(reply)) { | |
1000 | error = ovs_flow_cmd_fill_info(flow, | |
1001 | ovs_header->dp_ifindex, | |
1002 | reply, info->snd_portid, | |
1003 | info->snd_seq, 0, | |
1004 | OVS_FLOW_CMD_NEW); | |
1005 | BUG_ON(error < 0); | |
1006 | } | |
1007 | } else { | |
1008 | /* Could not alloc without acts before locking. */ | |
1009 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
1010 | info, OVS_FLOW_CMD_NEW, false); | |
1011 | if (unlikely(IS_ERR(reply))) { | |
1012 | error = PTR_ERR(reply); | |
1013 | goto err_unlock_ovs; | |
1014 | } | |
ccb1352e | 1015 | } |
37bdc87b | 1016 | |
37bdc87b JR |
1017 | /* Clear stats. */ |
1018 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1019 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1020 | ovs_unlock(); |
ccb1352e | 1021 | |
893f139b JR |
1022 | if (reply) |
1023 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1024 | if (old_acts) | |
1025 | ovs_nla_free_flow_actions(old_acts); | |
fb5d1e9e | 1026 | |
ccb1352e JG |
1027 | return 0; |
1028 | ||
8e4e1713 PS |
1029 | err_unlock_ovs: |
1030 | ovs_unlock(); | |
893f139b JR |
1031 | kfree_skb(reply); |
1032 | err_kfree_acts: | |
74f84a57 | 1033 | kfree(acts); |
ccb1352e JG |
1034 | error: |
1035 | return error; | |
1036 | } | |
1037 | ||
1038 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1039 | { | |
1040 | struct nlattr **a = info->attrs; | |
1041 | struct ovs_header *ovs_header = info->userhdr; | |
1042 | struct sw_flow_key key; | |
1043 | struct sk_buff *reply; | |
1044 | struct sw_flow *flow; | |
1045 | struct datapath *dp; | |
03f0d916 | 1046 | struct sw_flow_match match; |
ccb1352e | 1047 | int err; |
ccb1352e | 1048 | |
03f0d916 AZ |
1049 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1050 | OVS_NLERR("Flow get message rejected, Key attribute missing.\n"); | |
ccb1352e | 1051 | return -EINVAL; |
03f0d916 AZ |
1052 | } |
1053 | ||
1054 | ovs_match_init(&match, &key, NULL); | |
23dabf88 | 1055 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL); |
ccb1352e JG |
1056 | if (err) |
1057 | return err; | |
1058 | ||
8e4e1713 | 1059 | ovs_lock(); |
46df7b81 | 1060 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1061 | if (!dp) { |
1062 | err = -ENODEV; | |
1063 | goto unlock; | |
1064 | } | |
ccb1352e | 1065 | |
4a46b24e AW |
1066 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1067 | if (!flow) { | |
8e4e1713 PS |
1068 | err = -ENOENT; |
1069 | goto unlock; | |
1070 | } | |
ccb1352e | 1071 | |
0e9796b4 JR |
1072 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
1073 | OVS_FLOW_CMD_NEW, true); | |
8e4e1713 PS |
1074 | if (IS_ERR(reply)) { |
1075 | err = PTR_ERR(reply); | |
1076 | goto unlock; | |
1077 | } | |
ccb1352e | 1078 | |
8e4e1713 | 1079 | ovs_unlock(); |
ccb1352e | 1080 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1081 | unlock: |
1082 | ovs_unlock(); | |
1083 | return err; | |
ccb1352e JG |
1084 | } |
1085 | ||
1086 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1087 | { | |
1088 | struct nlattr **a = info->attrs; | |
1089 | struct ovs_header *ovs_header = info->userhdr; | |
1090 | struct sw_flow_key key; | |
1091 | struct sk_buff *reply; | |
1092 | struct sw_flow *flow; | |
1093 | struct datapath *dp; | |
03f0d916 | 1094 | struct sw_flow_match match; |
ccb1352e | 1095 | int err; |
ccb1352e | 1096 | |
aed06778 JR |
1097 | if (likely(a[OVS_FLOW_ATTR_KEY])) { |
1098 | ovs_match_init(&match, &key, NULL); | |
1099 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL); | |
1100 | if (unlikely(err)) | |
1101 | return err; | |
1102 | } | |
1103 | ||
8e4e1713 | 1104 | ovs_lock(); |
46df7b81 | 1105 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1106 | if (unlikely(!dp)) { |
8e4e1713 PS |
1107 | err = -ENODEV; |
1108 | goto unlock; | |
1109 | } | |
46df7b81 | 1110 | |
aed06778 | 1111 | if (unlikely(!a[OVS_FLOW_ATTR_KEY])) { |
b637e498 | 1112 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1113 | goto unlock; |
1114 | } | |
03f0d916 | 1115 | |
4a46b24e AW |
1116 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1117 | if (unlikely(!flow)) { | |
8e4e1713 PS |
1118 | err = -ENOENT; |
1119 | goto unlock; | |
1120 | } | |
ccb1352e | 1121 | |
b637e498 | 1122 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1123 | ovs_unlock(); |
ccb1352e | 1124 | |
aed06778 JR |
1125 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
1126 | info, false); | |
1127 | if (likely(reply)) { | |
1128 | if (likely(!IS_ERR(reply))) { | |
1129 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1130 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1131 | reply, info->snd_portid, | |
1132 | info->snd_seq, 0, | |
1133 | OVS_FLOW_CMD_DEL); | |
1134 | rcu_read_unlock(); | |
1135 | BUG_ON(err < 0); | |
1136 | ||
1137 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1138 | } else { | |
1139 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1140 | } | |
fb5d1e9e | 1141 | } |
ccb1352e | 1142 | |
aed06778 | 1143 | ovs_flow_free(flow, true); |
ccb1352e | 1144 | return 0; |
8e4e1713 PS |
1145 | unlock: |
1146 | ovs_unlock(); | |
1147 | return err; | |
ccb1352e JG |
1148 | } |
1149 | ||
1150 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1151 | { | |
1152 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
b637e498 | 1153 | struct table_instance *ti; |
ccb1352e | 1154 | struct datapath *dp; |
ccb1352e | 1155 | |
d57170b1 | 1156 | rcu_read_lock(); |
46df7b81 | 1157 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1158 | if (!dp) { |
d57170b1 | 1159 | rcu_read_unlock(); |
ccb1352e | 1160 | return -ENODEV; |
8e4e1713 | 1161 | } |
ccb1352e | 1162 | |
b637e498 | 1163 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1164 | for (;;) { |
1165 | struct sw_flow *flow; | |
1166 | u32 bucket, obj; | |
1167 | ||
1168 | bucket = cb->args[0]; | |
1169 | obj = cb->args[1]; | |
b637e498 | 1170 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1171 | if (!flow) |
1172 | break; | |
1173 | ||
0e9796b4 | 1174 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1175 | NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1176 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1177 | OVS_FLOW_CMD_NEW) < 0) | |
1178 | break; | |
1179 | ||
1180 | cb->args[0] = bucket; | |
1181 | cb->args[1] = obj; | |
1182 | } | |
d57170b1 | 1183 | rcu_read_unlock(); |
ccb1352e JG |
1184 | return skb->len; |
1185 | } | |
1186 | ||
0c200ef9 PS |
1187 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1188 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
1189 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1190 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
1191 | }; | |
1192 | ||
48e48a70 | 1193 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e JG |
1194 | { .cmd = OVS_FLOW_CMD_NEW, |
1195 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1196 | .policy = flow_policy, | |
37bdc87b | 1197 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1198 | }, |
1199 | { .cmd = OVS_FLOW_CMD_DEL, | |
1200 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1201 | .policy = flow_policy, | |
1202 | .doit = ovs_flow_cmd_del | |
1203 | }, | |
1204 | { .cmd = OVS_FLOW_CMD_GET, | |
1205 | .flags = 0, /* OK for unprivileged users. */ | |
1206 | .policy = flow_policy, | |
1207 | .doit = ovs_flow_cmd_get, | |
1208 | .dumpit = ovs_flow_cmd_dump | |
1209 | }, | |
1210 | { .cmd = OVS_FLOW_CMD_SET, | |
1211 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1212 | .policy = flow_policy, | |
37bdc87b | 1213 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1214 | }, |
1215 | }; | |
1216 | ||
0c200ef9 | 1217 | static struct genl_family dp_flow_genl_family = { |
ccb1352e JG |
1218 | .id = GENL_ID_GENERATE, |
1219 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1220 | .name = OVS_FLOW_FAMILY, |
1221 | .version = OVS_FLOW_VERSION, | |
1222 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3a4e0d6a PS |
1223 | .netnsok = true, |
1224 | .parallel_ops = true, | |
0c200ef9 PS |
1225 | .ops = dp_flow_genl_ops, |
1226 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1227 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1228 | .n_mcgrps = 1, | |
ccb1352e JG |
1229 | }; |
1230 | ||
c3ff8cfe TG |
1231 | static size_t ovs_dp_cmd_msg_size(void) |
1232 | { | |
1233 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1234 | ||
1235 | msgsize += nla_total_size(IFNAMSIZ); | |
1236 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1bd7116f | 1237 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
45fb9c35 | 1238 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1239 | |
1240 | return msgsize; | |
1241 | } | |
1242 | ||
bb6f9a70 | 1243 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1244 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1245 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1246 | { |
1247 | struct ovs_header *ovs_header; | |
1248 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1249 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1250 | int err; |
1251 | ||
15e47304 | 1252 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1253 | flags, cmd); |
1254 | if (!ovs_header) | |
1255 | goto error; | |
1256 | ||
1257 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1258 | ||
ccb1352e | 1259 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1260 | if (err) |
1261 | goto nla_put_failure; | |
1262 | ||
1bd7116f AZ |
1263 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1264 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1265 | &dp_stats)) | |
1266 | goto nla_put_failure; | |
1267 | ||
1268 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1269 | sizeof(struct ovs_dp_megaflow_stats), | |
1270 | &dp_megaflow_stats)) | |
028d6a67 | 1271 | goto nla_put_failure; |
ccb1352e | 1272 | |
43d4be9c TG |
1273 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1274 | goto nla_put_failure; | |
1275 | ||
ccb1352e JG |
1276 | return genlmsg_end(skb, ovs_header); |
1277 | ||
1278 | nla_put_failure: | |
1279 | genlmsg_cancel(skb, ovs_header); | |
1280 | error: | |
1281 | return -EMSGSIZE; | |
1282 | } | |
1283 | ||
6093ae9a | 1284 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
ccb1352e | 1285 | { |
6093ae9a | 1286 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
ccb1352e JG |
1287 | } |
1288 | ||
bb6f9a70 | 1289 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 PS |
1290 | static struct datapath *lookup_datapath(struct net *net, |
1291 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1292 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1293 | { | |
1294 | struct datapath *dp; | |
1295 | ||
1296 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1297 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1298 | else { |
1299 | struct vport *vport; | |
1300 | ||
46df7b81 | 1301 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1302 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1303 | } |
1304 | return dp ? dp : ERR_PTR(-ENODEV); | |
1305 | } | |
1306 | ||
44da5ae5 TG |
1307 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1308 | { | |
1309 | struct datapath *dp; | |
1310 | ||
1311 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1312 | if (IS_ERR(dp)) |
44da5ae5 TG |
1313 | return; |
1314 | ||
1315 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1316 | dp->user_features = 0; | |
1317 | } | |
1318 | ||
43d4be9c TG |
1319 | static void ovs_dp_change(struct datapath *dp, struct nlattr **a) |
1320 | { | |
1321 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1322 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1323 | } | |
1324 | ||
ccb1352e JG |
1325 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1326 | { | |
1327 | struct nlattr **a = info->attrs; | |
1328 | struct vport_parms parms; | |
1329 | struct sk_buff *reply; | |
1330 | struct datapath *dp; | |
1331 | struct vport *vport; | |
46df7b81 | 1332 | struct ovs_net *ovs_net; |
15eac2a7 | 1333 | int err, i; |
ccb1352e JG |
1334 | |
1335 | err = -EINVAL; | |
1336 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1337 | goto err; | |
1338 | ||
6093ae9a JR |
1339 | reply = ovs_dp_cmd_alloc_info(info); |
1340 | if (!reply) | |
1341 | return -ENOMEM; | |
ccb1352e JG |
1342 | |
1343 | err = -ENOMEM; | |
1344 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1345 | if (dp == NULL) | |
6093ae9a | 1346 | goto err_free_reply; |
46df7b81 | 1347 | |
46df7b81 | 1348 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
ccb1352e JG |
1349 | |
1350 | /* Allocate table. */ | |
b637e498 PS |
1351 | err = ovs_flow_tbl_init(&dp->table); |
1352 | if (err) | |
ccb1352e JG |
1353 | goto err_free_dp; |
1354 | ||
1c213bd2 | 1355 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1356 | if (!dp->stats_percpu) { |
1357 | err = -ENOMEM; | |
1358 | goto err_destroy_table; | |
1359 | } | |
1360 | ||
15eac2a7 | 1361 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
e6445719 | 1362 | GFP_KERNEL); |
15eac2a7 PS |
1363 | if (!dp->ports) { |
1364 | err = -ENOMEM; | |
1365 | goto err_destroy_percpu; | |
1366 | } | |
1367 | ||
1368 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1369 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1370 | ||
ccb1352e JG |
1371 | /* Set up our datapath device. */ |
1372 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1373 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1374 | parms.options = NULL; | |
1375 | parms.dp = dp; | |
1376 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1377 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1378 | |
43d4be9c TG |
1379 | ovs_dp_change(dp, a); |
1380 | ||
6093ae9a JR |
1381 | /* So far only local changes have been made, now need the lock. */ |
1382 | ovs_lock(); | |
1383 | ||
ccb1352e JG |
1384 | vport = new_vport(&parms); |
1385 | if (IS_ERR(vport)) { | |
1386 | err = PTR_ERR(vport); | |
1387 | if (err == -EBUSY) | |
1388 | err = -EEXIST; | |
1389 | ||
44da5ae5 TG |
1390 | if (err == -EEXIST) { |
1391 | /* An outdated user space instance that does not understand | |
1392 | * the concept of user_features has attempted to create a new | |
1393 | * datapath and is likely to reuse it. Drop all user features. | |
1394 | */ | |
1395 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1396 | ovs_dp_reset_user_features(skb, info); | |
1397 | } | |
1398 | ||
15eac2a7 | 1399 | goto err_destroy_ports_array; |
ccb1352e JG |
1400 | } |
1401 | ||
6093ae9a JR |
1402 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1403 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1404 | BUG_ON(err < 0); | |
ccb1352e | 1405 | |
46df7b81 | 1406 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1407 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1408 | |
1409 | ovs_unlock(); | |
ccb1352e | 1410 | |
2a94fe48 | 1411 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1412 | return 0; |
1413 | ||
15eac2a7 | 1414 | err_destroy_ports_array: |
6093ae9a | 1415 | ovs_unlock(); |
15eac2a7 | 1416 | kfree(dp->ports); |
ccb1352e JG |
1417 | err_destroy_percpu: |
1418 | free_percpu(dp->stats_percpu); | |
1419 | err_destroy_table: | |
e80857cc | 1420 | ovs_flow_tbl_destroy(&dp->table, false); |
ccb1352e | 1421 | err_free_dp: |
46df7b81 | 1422 | release_net(ovs_dp_get_net(dp)); |
ccb1352e | 1423 | kfree(dp); |
6093ae9a JR |
1424 | err_free_reply: |
1425 | kfree_skb(reply); | |
ccb1352e JG |
1426 | err: |
1427 | return err; | |
1428 | } | |
1429 | ||
8e4e1713 | 1430 | /* Called with ovs_mutex. */ |
46df7b81 | 1431 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1432 | { |
15eac2a7 | 1433 | int i; |
ccb1352e | 1434 | |
15eac2a7 PS |
1435 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1436 | struct vport *vport; | |
b67bfe0d | 1437 | struct hlist_node *n; |
15eac2a7 | 1438 | |
b67bfe0d | 1439 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1440 | if (vport->port_no != OVSP_LOCAL) |
1441 | ovs_dp_detach_port(vport); | |
1442 | } | |
ccb1352e | 1443 | |
59a35d60 | 1444 | list_del_rcu(&dp->list_node); |
ccb1352e | 1445 | |
8e4e1713 | 1446 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1447 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1448 | */ |
8e4e1713 | 1449 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1450 | |
e80857cc AZ |
1451 | /* RCU destroy the flow table */ |
1452 | ovs_flow_tbl_destroy(&dp->table, true); | |
1453 | ||
ccb1352e | 1454 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1455 | } |
1456 | ||
1457 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1458 | { | |
1459 | struct sk_buff *reply; | |
1460 | struct datapath *dp; | |
1461 | int err; | |
1462 | ||
6093ae9a JR |
1463 | reply = ovs_dp_cmd_alloc_info(info); |
1464 | if (!reply) | |
1465 | return -ENOMEM; | |
1466 | ||
8e4e1713 | 1467 | ovs_lock(); |
46df7b81 PS |
1468 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1469 | err = PTR_ERR(dp); | |
1470 | if (IS_ERR(dp)) | |
6093ae9a | 1471 | goto err_unlock_free; |
46df7b81 | 1472 | |
6093ae9a JR |
1473 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1474 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1475 | BUG_ON(err < 0); | |
46df7b81 PS |
1476 | |
1477 | __dp_destroy(dp); | |
8e4e1713 | 1478 | ovs_unlock(); |
ccb1352e | 1479 | |
2a94fe48 | 1480 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1481 | |
1482 | return 0; | |
6093ae9a JR |
1483 | |
1484 | err_unlock_free: | |
8e4e1713 | 1485 | ovs_unlock(); |
6093ae9a | 1486 | kfree_skb(reply); |
8e4e1713 | 1487 | return err; |
ccb1352e JG |
1488 | } |
1489 | ||
1490 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1491 | { | |
1492 | struct sk_buff *reply; | |
1493 | struct datapath *dp; | |
1494 | int err; | |
1495 | ||
6093ae9a JR |
1496 | reply = ovs_dp_cmd_alloc_info(info); |
1497 | if (!reply) | |
1498 | return -ENOMEM; | |
1499 | ||
8e4e1713 | 1500 | ovs_lock(); |
46df7b81 | 1501 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1502 | err = PTR_ERR(dp); |
ccb1352e | 1503 | if (IS_ERR(dp)) |
6093ae9a | 1504 | goto err_unlock_free; |
ccb1352e | 1505 | |
43d4be9c TG |
1506 | ovs_dp_change(dp, info->attrs); |
1507 | ||
6093ae9a JR |
1508 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1509 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1510 | BUG_ON(err < 0); | |
ccb1352e | 1511 | |
8e4e1713 | 1512 | ovs_unlock(); |
2a94fe48 | 1513 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1514 | |
1515 | return 0; | |
6093ae9a JR |
1516 | |
1517 | err_unlock_free: | |
8e4e1713 | 1518 | ovs_unlock(); |
6093ae9a | 1519 | kfree_skb(reply); |
8e4e1713 | 1520 | return err; |
ccb1352e JG |
1521 | } |
1522 | ||
1523 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1524 | { | |
1525 | struct sk_buff *reply; | |
1526 | struct datapath *dp; | |
8e4e1713 | 1527 | int err; |
ccb1352e | 1528 | |
6093ae9a JR |
1529 | reply = ovs_dp_cmd_alloc_info(info); |
1530 | if (!reply) | |
1531 | return -ENOMEM; | |
1532 | ||
1533 | rcu_read_lock(); | |
46df7b81 | 1534 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1535 | if (IS_ERR(dp)) { |
1536 | err = PTR_ERR(dp); | |
6093ae9a | 1537 | goto err_unlock_free; |
8e4e1713 | 1538 | } |
6093ae9a JR |
1539 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1540 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1541 | BUG_ON(err < 0); | |
1542 | rcu_read_unlock(); | |
ccb1352e JG |
1543 | |
1544 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1545 | |
6093ae9a JR |
1546 | err_unlock_free: |
1547 | rcu_read_unlock(); | |
1548 | kfree_skb(reply); | |
8e4e1713 | 1549 | return err; |
ccb1352e JG |
1550 | } |
1551 | ||
1552 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1553 | { | |
46df7b81 | 1554 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1555 | struct datapath *dp; |
1556 | int skip = cb->args[0]; | |
1557 | int i = 0; | |
1558 | ||
59a35d60 PS |
1559 | rcu_read_lock(); |
1560 | list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1561 | if (i >= skip && |
15e47304 | 1562 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1563 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1564 | OVS_DP_CMD_NEW) < 0) | |
1565 | break; | |
1566 | i++; | |
1567 | } | |
59a35d60 | 1568 | rcu_read_unlock(); |
ccb1352e JG |
1569 | |
1570 | cb->args[0] = i; | |
1571 | ||
1572 | return skb->len; | |
1573 | } | |
1574 | ||
0c200ef9 PS |
1575 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1576 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1577 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1578 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1579 | }; | |
1580 | ||
48e48a70 | 1581 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e JG |
1582 | { .cmd = OVS_DP_CMD_NEW, |
1583 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1584 | .policy = datapath_policy, | |
1585 | .doit = ovs_dp_cmd_new | |
1586 | }, | |
1587 | { .cmd = OVS_DP_CMD_DEL, | |
1588 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1589 | .policy = datapath_policy, | |
1590 | .doit = ovs_dp_cmd_del | |
1591 | }, | |
1592 | { .cmd = OVS_DP_CMD_GET, | |
1593 | .flags = 0, /* OK for unprivileged users. */ | |
1594 | .policy = datapath_policy, | |
1595 | .doit = ovs_dp_cmd_get, | |
1596 | .dumpit = ovs_dp_cmd_dump | |
1597 | }, | |
1598 | { .cmd = OVS_DP_CMD_SET, | |
1599 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1600 | .policy = datapath_policy, | |
1601 | .doit = ovs_dp_cmd_set, | |
1602 | }, | |
1603 | }; | |
1604 | ||
0c200ef9 | 1605 | static struct genl_family dp_datapath_genl_family = { |
ccb1352e JG |
1606 | .id = GENL_ID_GENERATE, |
1607 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1608 | .name = OVS_DATAPATH_FAMILY, |
1609 | .version = OVS_DATAPATH_VERSION, | |
1610 | .maxattr = OVS_DP_ATTR_MAX, | |
3a4e0d6a PS |
1611 | .netnsok = true, |
1612 | .parallel_ops = true, | |
0c200ef9 PS |
1613 | .ops = dp_datapath_genl_ops, |
1614 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1615 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1616 | .n_mcgrps = 1, | |
ccb1352e JG |
1617 | }; |
1618 | ||
8e4e1713 | 1619 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1620 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1621 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1622 | { |
1623 | struct ovs_header *ovs_header; | |
1624 | struct ovs_vport_stats vport_stats; | |
1625 | int err; | |
1626 | ||
15e47304 | 1627 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1628 | flags, cmd); |
1629 | if (!ovs_header) | |
1630 | return -EMSGSIZE; | |
1631 | ||
1632 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1633 | ||
028d6a67 DM |
1634 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1635 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 AW |
1636 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
1637 | vport->ops->get_name(vport))) | |
028d6a67 | 1638 | goto nla_put_failure; |
ccb1352e JG |
1639 | |
1640 | ovs_vport_get_stats(vport, &vport_stats); | |
028d6a67 DM |
1641 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1642 | &vport_stats)) | |
1643 | goto nla_put_failure; | |
ccb1352e | 1644 | |
5cd667b0 AW |
1645 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1646 | goto nla_put_failure; | |
1647 | ||
ccb1352e JG |
1648 | err = ovs_vport_get_options(vport, skb); |
1649 | if (err == -EMSGSIZE) | |
1650 | goto error; | |
1651 | ||
1652 | return genlmsg_end(skb, ovs_header); | |
1653 | ||
1654 | nla_put_failure: | |
1655 | err = -EMSGSIZE; | |
1656 | error: | |
1657 | genlmsg_cancel(skb, ovs_header); | |
1658 | return err; | |
1659 | } | |
1660 | ||
6093ae9a JR |
1661 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1662 | { | |
1663 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1664 | } | |
1665 | ||
1666 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
15e47304 | 1667 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1668 | u32 seq, u8 cmd) |
1669 | { | |
1670 | struct sk_buff *skb; | |
1671 | int retval; | |
1672 | ||
1673 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1674 | if (!skb) | |
1675 | return ERR_PTR(-ENOMEM); | |
1676 | ||
15e47304 | 1677 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1678 | BUG_ON(retval < 0); |
1679 | ||
ccb1352e JG |
1680 | return skb; |
1681 | } | |
1682 | ||
8e4e1713 | 1683 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 PS |
1684 | static struct vport *lookup_vport(struct net *net, |
1685 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1686 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1687 | { | |
1688 | struct datapath *dp; | |
1689 | struct vport *vport; | |
1690 | ||
1691 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1692 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1693 | if (!vport) |
1694 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1695 | if (ovs_header->dp_ifindex && |
1696 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1697 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1698 | return vport; |
1699 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1700 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1701 | ||
1702 | if (port_no >= DP_MAX_PORTS) | |
1703 | return ERR_PTR(-EFBIG); | |
1704 | ||
46df7b81 | 1705 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1706 | if (!dp) |
1707 | return ERR_PTR(-ENODEV); | |
1708 | ||
8e4e1713 | 1709 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1710 | if (!vport) |
14408dba | 1711 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1712 | return vport; |
1713 | } else | |
1714 | return ERR_PTR(-EINVAL); | |
1715 | } | |
1716 | ||
1717 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
1718 | { | |
1719 | struct nlattr **a = info->attrs; | |
1720 | struct ovs_header *ovs_header = info->userhdr; | |
1721 | struct vport_parms parms; | |
1722 | struct sk_buff *reply; | |
1723 | struct vport *vport; | |
1724 | struct datapath *dp; | |
1725 | u32 port_no; | |
1726 | int err; | |
1727 | ||
ccb1352e JG |
1728 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1729 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a JR |
1730 | return -EINVAL; |
1731 | ||
1732 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1733 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1734 | if (port_no >= DP_MAX_PORTS) | |
1735 | return -EFBIG; | |
1736 | ||
1737 | reply = ovs_vport_cmd_alloc_info(); | |
1738 | if (!reply) | |
1739 | return -ENOMEM; | |
ccb1352e | 1740 | |
8e4e1713 | 1741 | ovs_lock(); |
46df7b81 | 1742 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1743 | err = -ENODEV; |
1744 | if (!dp) | |
6093ae9a | 1745 | goto exit_unlock_free; |
ccb1352e | 1746 | |
6093ae9a | 1747 | if (port_no) { |
8e4e1713 | 1748 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1749 | err = -EBUSY; |
1750 | if (vport) | |
6093ae9a | 1751 | goto exit_unlock_free; |
ccb1352e JG |
1752 | } else { |
1753 | for (port_no = 1; ; port_no++) { | |
1754 | if (port_no >= DP_MAX_PORTS) { | |
1755 | err = -EFBIG; | |
6093ae9a | 1756 | goto exit_unlock_free; |
ccb1352e | 1757 | } |
8e4e1713 | 1758 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1759 | if (!vport) |
1760 | break; | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
1765 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1766 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
1767 | parms.dp = dp; | |
1768 | parms.port_no = port_no; | |
5cd667b0 | 1769 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
1770 | |
1771 | vport = new_vport(&parms); | |
1772 | err = PTR_ERR(vport); | |
1773 | if (IS_ERR(vport)) | |
6093ae9a | 1774 | goto exit_unlock_free; |
ccb1352e | 1775 | |
6093ae9a JR |
1776 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1777 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1778 | BUG_ON(err < 0); | |
1779 | ovs_unlock(); | |
ed661185 | 1780 | |
2a94fe48 | 1781 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1782 | return 0; |
ccb1352e | 1783 | |
6093ae9a | 1784 | exit_unlock_free: |
8e4e1713 | 1785 | ovs_unlock(); |
6093ae9a | 1786 | kfree_skb(reply); |
ccb1352e JG |
1787 | return err; |
1788 | } | |
1789 | ||
1790 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1791 | { | |
1792 | struct nlattr **a = info->attrs; | |
1793 | struct sk_buff *reply; | |
1794 | struct vport *vport; | |
1795 | int err; | |
1796 | ||
6093ae9a JR |
1797 | reply = ovs_vport_cmd_alloc_info(); |
1798 | if (!reply) | |
1799 | return -ENOMEM; | |
1800 | ||
8e4e1713 | 1801 | ovs_lock(); |
46df7b81 | 1802 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1803 | err = PTR_ERR(vport); |
1804 | if (IS_ERR(vport)) | |
6093ae9a | 1805 | goto exit_unlock_free; |
ccb1352e | 1806 | |
ccb1352e | 1807 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 1808 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 1809 | err = -EINVAL; |
6093ae9a | 1810 | goto exit_unlock_free; |
a9341512 JG |
1811 | } |
1812 | ||
f44f3408 | 1813 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 1814 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 1815 | if (err) |
6093ae9a | 1816 | goto exit_unlock_free; |
f44f3408 | 1817 | } |
a9341512 | 1818 | |
5cd667b0 AW |
1819 | |
1820 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
1821 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
1822 | ||
1823 | err = ovs_vport_set_upcall_portids(vport, ids); | |
1824 | if (err) | |
1825 | goto exit_unlock_free; | |
1826 | } | |
ccb1352e | 1827 | |
a9341512 JG |
1828 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1829 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1830 | BUG_ON(err < 0); | |
ccb1352e | 1831 | |
8e4e1713 | 1832 | ovs_unlock(); |
2a94fe48 | 1833 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 1834 | return 0; |
ccb1352e | 1835 | |
6093ae9a | 1836 | exit_unlock_free: |
8e4e1713 | 1837 | ovs_unlock(); |
6093ae9a | 1838 | kfree_skb(reply); |
ccb1352e JG |
1839 | return err; |
1840 | } | |
1841 | ||
1842 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1843 | { | |
1844 | struct nlattr **a = info->attrs; | |
1845 | struct sk_buff *reply; | |
1846 | struct vport *vport; | |
1847 | int err; | |
1848 | ||
6093ae9a JR |
1849 | reply = ovs_vport_cmd_alloc_info(); |
1850 | if (!reply) | |
1851 | return -ENOMEM; | |
1852 | ||
8e4e1713 | 1853 | ovs_lock(); |
46df7b81 | 1854 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1855 | err = PTR_ERR(vport); |
1856 | if (IS_ERR(vport)) | |
6093ae9a | 1857 | goto exit_unlock_free; |
ccb1352e JG |
1858 | |
1859 | if (vport->port_no == OVSP_LOCAL) { | |
1860 | err = -EINVAL; | |
6093ae9a | 1861 | goto exit_unlock_free; |
ccb1352e JG |
1862 | } |
1863 | ||
6093ae9a JR |
1864 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1865 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
1866 | BUG_ON(err < 0); | |
ccb1352e | 1867 | ovs_dp_detach_port(vport); |
6093ae9a | 1868 | ovs_unlock(); |
ccb1352e | 1869 | |
2a94fe48 | 1870 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1871 | return 0; |
ccb1352e | 1872 | |
6093ae9a | 1873 | exit_unlock_free: |
8e4e1713 | 1874 | ovs_unlock(); |
6093ae9a | 1875 | kfree_skb(reply); |
ccb1352e JG |
1876 | return err; |
1877 | } | |
1878 | ||
1879 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1880 | { | |
1881 | struct nlattr **a = info->attrs; | |
1882 | struct ovs_header *ovs_header = info->userhdr; | |
1883 | struct sk_buff *reply; | |
1884 | struct vport *vport; | |
1885 | int err; | |
1886 | ||
6093ae9a JR |
1887 | reply = ovs_vport_cmd_alloc_info(); |
1888 | if (!reply) | |
1889 | return -ENOMEM; | |
1890 | ||
ccb1352e | 1891 | rcu_read_lock(); |
46df7b81 | 1892 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
1893 | err = PTR_ERR(vport); |
1894 | if (IS_ERR(vport)) | |
6093ae9a JR |
1895 | goto exit_unlock_free; |
1896 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
1897 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1898 | BUG_ON(err < 0); | |
ccb1352e JG |
1899 | rcu_read_unlock(); |
1900 | ||
1901 | return genlmsg_reply(reply, info); | |
1902 | ||
6093ae9a | 1903 | exit_unlock_free: |
ccb1352e | 1904 | rcu_read_unlock(); |
6093ae9a | 1905 | kfree_skb(reply); |
ccb1352e JG |
1906 | return err; |
1907 | } | |
1908 | ||
1909 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1910 | { | |
1911 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
1912 | struct datapath *dp; | |
15eac2a7 PS |
1913 | int bucket = cb->args[0], skip = cb->args[1]; |
1914 | int i, j = 0; | |
ccb1352e | 1915 | |
42ee19e2 | 1916 | rcu_read_lock(); |
46df7b81 | 1917 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
1918 | if (!dp) { |
1919 | rcu_read_unlock(); | |
ccb1352e | 1920 | return -ENODEV; |
42ee19e2 | 1921 | } |
15eac2a7 | 1922 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 1923 | struct vport *vport; |
15eac2a7 PS |
1924 | |
1925 | j = 0; | |
b67bfe0d | 1926 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
1927 | if (j >= skip && |
1928 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 1929 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
1930 | cb->nlh->nlmsg_seq, |
1931 | NLM_F_MULTI, | |
1932 | OVS_VPORT_CMD_NEW) < 0) | |
1933 | goto out; | |
1934 | ||
1935 | j++; | |
1936 | } | |
1937 | skip = 0; | |
ccb1352e | 1938 | } |
15eac2a7 | 1939 | out: |
ccb1352e JG |
1940 | rcu_read_unlock(); |
1941 | ||
15eac2a7 PS |
1942 | cb->args[0] = i; |
1943 | cb->args[1] = j; | |
ccb1352e | 1944 | |
15eac2a7 | 1945 | return skb->len; |
ccb1352e JG |
1946 | } |
1947 | ||
0c200ef9 PS |
1948 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
1949 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1950 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
1951 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
1952 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
1953 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1954 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
1955 | }; | |
1956 | ||
48e48a70 | 1957 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e JG |
1958 | { .cmd = OVS_VPORT_CMD_NEW, |
1959 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1960 | .policy = vport_policy, | |
1961 | .doit = ovs_vport_cmd_new | |
1962 | }, | |
1963 | { .cmd = OVS_VPORT_CMD_DEL, | |
1964 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1965 | .policy = vport_policy, | |
1966 | .doit = ovs_vport_cmd_del | |
1967 | }, | |
1968 | { .cmd = OVS_VPORT_CMD_GET, | |
1969 | .flags = 0, /* OK for unprivileged users. */ | |
1970 | .policy = vport_policy, | |
1971 | .doit = ovs_vport_cmd_get, | |
1972 | .dumpit = ovs_vport_cmd_dump | |
1973 | }, | |
1974 | { .cmd = OVS_VPORT_CMD_SET, | |
1975 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1976 | .policy = vport_policy, | |
1977 | .doit = ovs_vport_cmd_set, | |
1978 | }, | |
1979 | }; | |
1980 | ||
0c200ef9 PS |
1981 | struct genl_family dp_vport_genl_family = { |
1982 | .id = GENL_ID_GENERATE, | |
1983 | .hdrsize = sizeof(struct ovs_header), | |
1984 | .name = OVS_VPORT_FAMILY, | |
1985 | .version = OVS_VPORT_VERSION, | |
1986 | .maxattr = OVS_VPORT_ATTR_MAX, | |
1987 | .netnsok = true, | |
1988 | .parallel_ops = true, | |
1989 | .ops = dp_vport_genl_ops, | |
1990 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
1991 | .mcgrps = &ovs_dp_vport_multicast_group, | |
1992 | .n_mcgrps = 1, | |
ccb1352e JG |
1993 | }; |
1994 | ||
0c200ef9 PS |
1995 | static struct genl_family * const dp_genl_families[] = { |
1996 | &dp_datapath_genl_family, | |
1997 | &dp_vport_genl_family, | |
1998 | &dp_flow_genl_family, | |
1999 | &dp_packet_genl_family, | |
ccb1352e JG |
2000 | }; |
2001 | ||
2002 | static void dp_unregister_genl(int n_families) | |
2003 | { | |
2004 | int i; | |
2005 | ||
2006 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2007 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2008 | } |
2009 | ||
2010 | static int dp_register_genl(void) | |
2011 | { | |
ccb1352e JG |
2012 | int err; |
2013 | int i; | |
2014 | ||
ccb1352e | 2015 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2016 | |
0c200ef9 | 2017 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2018 | if (err) |
2019 | goto error; | |
ccb1352e JG |
2020 | } |
2021 | ||
2022 | return 0; | |
2023 | ||
2024 | error: | |
0c200ef9 | 2025 | dp_unregister_genl(i); |
ccb1352e JG |
2026 | return err; |
2027 | } | |
2028 | ||
46df7b81 PS |
2029 | static int __net_init ovs_init_net(struct net *net) |
2030 | { | |
2031 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2032 | ||
2033 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2034 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
46df7b81 PS |
2035 | return 0; |
2036 | } | |
2037 | ||
2038 | static void __net_exit ovs_exit_net(struct net *net) | |
2039 | { | |
46df7b81 | 2040 | struct datapath *dp, *dp_next; |
8e4e1713 | 2041 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
46df7b81 | 2042 | |
8e4e1713 | 2043 | ovs_lock(); |
46df7b81 PS |
2044 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2045 | __dp_destroy(dp); | |
8e4e1713 PS |
2046 | ovs_unlock(); |
2047 | ||
2048 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2049 | } |
2050 | ||
2051 | static struct pernet_operations ovs_net_ops = { | |
2052 | .init = ovs_init_net, | |
2053 | .exit = ovs_exit_net, | |
2054 | .id = &ovs_net_id, | |
2055 | .size = sizeof(struct ovs_net), | |
2056 | }; | |
2057 | ||
ccb1352e JG |
2058 | static int __init dp_init(void) |
2059 | { | |
ccb1352e JG |
2060 | int err; |
2061 | ||
3523b29b | 2062 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2063 | |
2064 | pr_info("Open vSwitch switching datapath\n"); | |
2065 | ||
5b9e7e16 | 2066 | err = ovs_internal_dev_rtnl_link_register(); |
ccb1352e JG |
2067 | if (err) |
2068 | goto error; | |
2069 | ||
5b9e7e16 JP |
2070 | err = ovs_flow_init(); |
2071 | if (err) | |
2072 | goto error_unreg_rtnl_link; | |
2073 | ||
ccb1352e JG |
2074 | err = ovs_vport_init(); |
2075 | if (err) | |
2076 | goto error_flow_exit; | |
2077 | ||
46df7b81 | 2078 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2079 | if (err) |
2080 | goto error_vport_exit; | |
2081 | ||
46df7b81 PS |
2082 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2083 | if (err) | |
2084 | goto error_netns_exit; | |
2085 | ||
ccb1352e JG |
2086 | err = dp_register_genl(); |
2087 | if (err < 0) | |
2088 | goto error_unreg_notifier; | |
2089 | ||
ccb1352e JG |
2090 | return 0; |
2091 | ||
2092 | error_unreg_notifier: | |
2093 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2094 | error_netns_exit: |
2095 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2096 | error_vport_exit: |
2097 | ovs_vport_exit(); | |
2098 | error_flow_exit: | |
2099 | ovs_flow_exit(); | |
5b9e7e16 JP |
2100 | error_unreg_rtnl_link: |
2101 | ovs_internal_dev_rtnl_link_unregister(); | |
ccb1352e JG |
2102 | error: |
2103 | return err; | |
2104 | } | |
2105 | ||
2106 | static void dp_cleanup(void) | |
2107 | { | |
ccb1352e JG |
2108 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
2109 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2110 | unregister_pernet_device(&ovs_net_ops); |
2111 | rcu_barrier(); | |
ccb1352e JG |
2112 | ovs_vport_exit(); |
2113 | ovs_flow_exit(); | |
5b9e7e16 | 2114 | ovs_internal_dev_rtnl_link_unregister(); |
ccb1352e JG |
2115 | } |
2116 | ||
2117 | module_init(dp_init); | |
2118 | module_exit(dp_cleanup); | |
2119 | ||
2120 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2121 | MODULE_LICENSE("GPL"); |