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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 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. */ | |
9b67aa4a SG |
81 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
82 | unsigned int group) | |
fb5d1e9e JR |
83 | { |
84 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
9b67aa4a SG |
85 | genl_has_listeners(family, genl_info_net(info)->genl_sock, |
86 | group); | |
fb5d1e9e JR |
87 | } |
88 | ||
68eb5503 | 89 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 90 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 91 | { |
68eb5503 | 92 | genl_notify(family, skb, genl_info_net(info), info->snd_portid, |
2a94fe48 | 93 | 0, info->nlhdr, GFP_KERNEL); |
ed661185 TG |
94 | } |
95 | ||
ccb1352e JG |
96 | /** |
97 | * DOC: Locking: | |
98 | * | |
8e4e1713 PS |
99 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
100 | * operations on vports, etc.), Writes to other state (flow table | |
101 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
102 | * by ovs_lock. | |
ccb1352e JG |
103 | * |
104 | * Reads are protected by RCU. | |
105 | * | |
106 | * There are a few special cases (mostly stats) that have their own | |
107 | * synchronization but they nest under all of above and don't interact with | |
108 | * each other. | |
8e4e1713 PS |
109 | * |
110 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
111 | */ |
112 | ||
8e4e1713 PS |
113 | static DEFINE_MUTEX(ovs_mutex); |
114 | ||
115 | void ovs_lock(void) | |
116 | { | |
117 | mutex_lock(&ovs_mutex); | |
118 | } | |
119 | ||
120 | void ovs_unlock(void) | |
121 | { | |
122 | mutex_unlock(&ovs_mutex); | |
123 | } | |
124 | ||
125 | #ifdef CONFIG_LOCKDEP | |
126 | int lockdep_ovsl_is_held(void) | |
127 | { | |
128 | if (debug_locks) | |
129 | return lockdep_is_held(&ovs_mutex); | |
130 | else | |
131 | return 1; | |
132 | } | |
133 | #endif | |
134 | ||
ccb1352e | 135 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 136 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
ccb1352e | 137 | const struct dp_upcall_info *); |
8055a89c | 138 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
ccb1352e JG |
139 | const struct dp_upcall_info *); |
140 | ||
8e4e1713 | 141 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 142 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
ccb1352e JG |
143 | { |
144 | struct datapath *dp = NULL; | |
145 | struct net_device *dev; | |
146 | ||
147 | rcu_read_lock(); | |
46df7b81 | 148 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
ccb1352e JG |
149 | if (dev) { |
150 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
151 | if (vport) | |
152 | dp = vport->dp; | |
153 | } | |
154 | rcu_read_unlock(); | |
155 | ||
156 | return dp; | |
157 | } | |
158 | ||
8e4e1713 | 159 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 160 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 161 | { |
8e4e1713 | 162 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
ccb1352e JG |
163 | return vport->ops->get_name(vport); |
164 | } | |
165 | ||
166 | static int get_dpifindex(struct datapath *dp) | |
167 | { | |
168 | struct vport *local; | |
169 | int ifindex; | |
170 | ||
171 | rcu_read_lock(); | |
172 | ||
15eac2a7 | 173 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 174 | if (local) |
cff63a52 | 175 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
ccb1352e JG |
176 | else |
177 | ifindex = 0; | |
178 | ||
179 | rcu_read_unlock(); | |
180 | ||
181 | return ifindex; | |
182 | } | |
183 | ||
184 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
185 | { | |
186 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
187 | ||
ccb1352e | 188 | free_percpu(dp->stats_percpu); |
46df7b81 | 189 | release_net(ovs_dp_get_net(dp)); |
15eac2a7 | 190 | kfree(dp->ports); |
ccb1352e JG |
191 | kfree(dp); |
192 | } | |
193 | ||
15eac2a7 PS |
194 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
195 | u16 port_no) | |
196 | { | |
197 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
198 | } | |
199 | ||
bb6f9a70 | 200 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
201 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
202 | { | |
203 | struct vport *vport; | |
15eac2a7 PS |
204 | struct hlist_head *head; |
205 | ||
206 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 207 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
208 | if (vport->port_no == port_no) |
209 | return vport; | |
210 | } | |
211 | return NULL; | |
212 | } | |
213 | ||
8e4e1713 | 214 | /* Called with ovs_mutex. */ |
ccb1352e JG |
215 | static struct vport *new_vport(const struct vport_parms *parms) |
216 | { | |
217 | struct vport *vport; | |
218 | ||
219 | vport = ovs_vport_add(parms); | |
220 | if (!IS_ERR(vport)) { | |
221 | struct datapath *dp = parms->dp; | |
15eac2a7 | 222 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 223 | |
15eac2a7 | 224 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 225 | } |
ccb1352e JG |
226 | return vport; |
227 | } | |
228 | ||
ccb1352e JG |
229 | void ovs_dp_detach_port(struct vport *p) |
230 | { | |
8e4e1713 | 231 | ASSERT_OVSL(); |
ccb1352e JG |
232 | |
233 | /* First drop references to device. */ | |
15eac2a7 | 234 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
235 | |
236 | /* Then destroy it. */ | |
237 | ovs_vport_del(p); | |
238 | } | |
239 | ||
240 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 241 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 242 | { |
83c8df26 | 243 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
244 | struct datapath *dp = p->dp; |
245 | struct sw_flow *flow; | |
246 | struct dp_stats_percpu *stats; | |
ccb1352e | 247 | u64 *stats_counter; |
1bd7116f | 248 | u32 n_mask_hit; |
ccb1352e | 249 | |
404f2f10 | 250 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 251 | |
ccb1352e | 252 | /* Look up flow. */ |
8c8b1b83 | 253 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit); |
ccb1352e JG |
254 | if (unlikely(!flow)) { |
255 | struct dp_upcall_info upcall; | |
8c8b1b83 | 256 | int error; |
ccb1352e JG |
257 | |
258 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
8c8b1b83 | 259 | upcall.key = key; |
ccb1352e | 260 | upcall.userdata = NULL; |
5cd667b0 | 261 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
c5eba0b6 LR |
262 | error = ovs_dp_upcall(dp, skb, &upcall); |
263 | if (unlikely(error)) | |
264 | kfree_skb(skb); | |
265 | else | |
266 | consume_skb(skb); | |
ccb1352e JG |
267 | stats_counter = &stats->n_missed; |
268 | goto out; | |
269 | } | |
270 | ||
271 | OVS_CB(skb)->flow = flow; | |
272 | ||
8c8b1b83 PS |
273 | ovs_flow_stats_update(OVS_CB(skb)->flow, key->tp.flags, skb); |
274 | ovs_execute_actions(dp, skb, key); | |
e298e505 | 275 | stats_counter = &stats->n_hit; |
ccb1352e JG |
276 | |
277 | out: | |
278 | /* Update datapath statistics. */ | |
df9d9fdf | 279 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 280 | (*stats_counter)++; |
1bd7116f | 281 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 282 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
283 | } |
284 | ||
ccb1352e | 285 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
46df7b81 | 286 | const struct dp_upcall_info *upcall_info) |
ccb1352e JG |
287 | { |
288 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
289 | int err; |
290 | ||
15e47304 | 291 | if (upcall_info->portid == 0) { |
ccb1352e JG |
292 | err = -ENOTCONN; |
293 | goto err; | |
294 | } | |
295 | ||
ccb1352e | 296 | if (!skb_is_gso(skb)) |
8055a89c | 297 | err = queue_userspace_packet(dp, skb, upcall_info); |
ccb1352e | 298 | else |
8055a89c | 299 | err = queue_gso_packets(dp, skb, upcall_info); |
ccb1352e JG |
300 | if (err) |
301 | goto err; | |
302 | ||
303 | return 0; | |
304 | ||
305 | err: | |
404f2f10 | 306 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 307 | |
df9d9fdf | 308 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 309 | stats->n_lost++; |
df9d9fdf | 310 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
311 | |
312 | return err; | |
313 | } | |
314 | ||
8055a89c | 315 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
ccb1352e JG |
316 | const struct dp_upcall_info *upcall_info) |
317 | { | |
a1b5d0dd | 318 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
ccb1352e JG |
319 | struct dp_upcall_info later_info; |
320 | struct sw_flow_key later_key; | |
321 | struct sk_buff *segs, *nskb; | |
322 | int err; | |
323 | ||
09c5e605 | 324 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
325 | if (IS_ERR(segs)) |
326 | return PTR_ERR(segs); | |
330966e5 FW |
327 | if (segs == NULL) |
328 | return -EINVAL; | |
ccb1352e JG |
329 | |
330 | /* Queue all of the segments. */ | |
331 | skb = segs; | |
332 | do { | |
8055a89c | 333 | err = queue_userspace_packet(dp, skb, upcall_info); |
ccb1352e JG |
334 | if (err) |
335 | break; | |
336 | ||
a1b5d0dd | 337 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
ccb1352e JG |
338 | /* The initial flow key extracted by ovs_flow_extract() |
339 | * in this case is for a first fragment, so we need to | |
340 | * properly mark later fragments. | |
341 | */ | |
342 | later_key = *upcall_info->key; | |
343 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
344 | ||
345 | later_info = *upcall_info; | |
346 | later_info.key = &later_key; | |
347 | upcall_info = &later_info; | |
348 | } | |
349 | } while ((skb = skb->next)); | |
350 | ||
351 | /* Free all of the segments. */ | |
352 | skb = segs; | |
353 | do { | |
354 | nskb = skb->next; | |
355 | if (err) | |
356 | kfree_skb(skb); | |
357 | else | |
358 | consume_skb(skb); | |
359 | } while ((skb = nskb)); | |
360 | return err; | |
361 | } | |
362 | ||
c3ff8cfe TG |
363 | static size_t key_attr_size(void) |
364 | { | |
365 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
7d5437c7 PS |
366 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ |
367 | + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
368 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
369 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
370 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
371 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
372 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
373 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
67fa0341 | 374 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */ |
f5796684 | 375 | + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */ |
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; | |
83c8df26 | 515 | struct vport *input_vport; |
ccb1352e JG |
516 | int len; |
517 | int err; | |
ccb1352e JG |
518 | |
519 | err = -EINVAL; | |
520 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 521 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
522 | goto err; |
523 | ||
524 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
525 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
526 | err = -ENOMEM; | |
527 | if (!packet) | |
528 | goto err; | |
529 | skb_reserve(packet, NET_IP_ALIGN); | |
530 | ||
32686a9d | 531 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e JG |
532 | |
533 | skb_reset_mac_header(packet); | |
534 | eth = eth_hdr(packet); | |
535 | ||
536 | /* Normally, setting the skb 'protocol' field would be handled by a | |
537 | * call to eth_type_trans(), but it assumes there's a sending | |
538 | * device, which we may not have. */ | |
e5c5d22e | 539 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
540 | packet->protocol = eth->h_proto; |
541 | else | |
542 | packet->protocol = htons(ETH_P_802_2); | |
543 | ||
544 | /* Build an sw_flow for sending this packet. */ | |
23dabf88 | 545 | flow = ovs_flow_alloc(); |
ccb1352e JG |
546 | err = PTR_ERR(flow); |
547 | if (IS_ERR(flow)) | |
548 | goto err_kfree_skb; | |
549 | ||
83c8df26 PS |
550 | err = ovs_flow_key_extract_userspace(a[OVS_PACKET_ATTR_KEY], packet, |
551 | &flow->key); | |
ccb1352e JG |
552 | if (err) |
553 | goto err_flow_free; | |
554 | ||
e6445719 | 555 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
ccb1352e JG |
556 | err = PTR_ERR(acts); |
557 | if (IS_ERR(acts)) | |
558 | goto err_flow_free; | |
74f84a57 | 559 | |
e6445719 PS |
560 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
561 | &flow->key, 0, &acts); | |
74f84a57 PS |
562 | if (err) |
563 | goto err_flow_free; | |
ccb1352e | 564 | |
f5796684 JG |
565 | rcu_assign_pointer(flow->sf_acts, acts); |
566 | ||
567 | OVS_CB(packet)->egress_tun_info = NULL; | |
ccb1352e JG |
568 | OVS_CB(packet)->flow = flow; |
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 | ||
83c8df26 PS |
578 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
579 | if (!input_vport) | |
580 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
581 | ||
582 | if (!input_vport) | |
583 | goto err_unlock; | |
584 | ||
585 | OVS_CB(packet)->input_vport = input_vport; | |
586 | ||
ccb1352e | 587 | local_bh_disable(); |
2ff3e4e4 | 588 | err = ovs_execute_actions(dp, packet, &flow->key); |
ccb1352e JG |
589 | local_bh_enable(); |
590 | rcu_read_unlock(); | |
591 | ||
03f0d916 | 592 | ovs_flow_free(flow, false); |
ccb1352e JG |
593 | return err; |
594 | ||
595 | err_unlock: | |
596 | rcu_read_unlock(); | |
597 | err_flow_free: | |
03f0d916 | 598 | ovs_flow_free(flow, false); |
ccb1352e JG |
599 | err_kfree_skb: |
600 | kfree_skb(packet); | |
601 | err: | |
602 | return err; | |
603 | } | |
604 | ||
605 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 606 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
607 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
608 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
609 | }; | |
610 | ||
4534de83 | 611 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e JG |
612 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
613 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
614 | .policy = packet_policy, | |
615 | .doit = ovs_packet_cmd_execute | |
616 | } | |
617 | }; | |
618 | ||
0c200ef9 PS |
619 | static struct genl_family dp_packet_genl_family = { |
620 | .id = GENL_ID_GENERATE, | |
621 | .hdrsize = sizeof(struct ovs_header), | |
622 | .name = OVS_PACKET_FAMILY, | |
623 | .version = OVS_PACKET_VERSION, | |
624 | .maxattr = OVS_PACKET_ATTR_MAX, | |
625 | .netnsok = true, | |
626 | .parallel_ops = true, | |
627 | .ops = dp_packet_genl_ops, | |
628 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
629 | }; | |
630 | ||
1bd7116f AZ |
631 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats, |
632 | struct ovs_dp_megaflow_stats *mega_stats) | |
ccb1352e JG |
633 | { |
634 | int i; | |
ccb1352e | 635 | |
1bd7116f AZ |
636 | memset(mega_stats, 0, sizeof(*mega_stats)); |
637 | ||
b637e498 | 638 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 639 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
640 | |
641 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 642 | |
ccb1352e JG |
643 | for_each_possible_cpu(i) { |
644 | const struct dp_stats_percpu *percpu_stats; | |
645 | struct dp_stats_percpu local_stats; | |
646 | unsigned int start; | |
647 | ||
648 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
649 | ||
650 | do { | |
57a7744e | 651 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 652 | local_stats = *percpu_stats; |
57a7744e | 653 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
654 | |
655 | stats->n_hit += local_stats.n_hit; | |
656 | stats->n_missed += local_stats.n_missed; | |
657 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 658 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
659 | } |
660 | } | |
661 | ||
c3ff8cfe TG |
662 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
663 | { | |
664 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
665 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
03f0d916 | 666 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */ |
c3ff8cfe TG |
667 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
668 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
669 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
670 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
671 | } | |
672 | ||
bb6f9a70 | 673 | /* Called with ovs_mutex or RCU read lock. */ |
0e9796b4 | 674 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
15e47304 | 675 | struct sk_buff *skb, u32 portid, |
ccb1352e JG |
676 | u32 seq, u32 flags, u8 cmd) |
677 | { | |
678 | const int skb_orig_len = skb->len; | |
74f84a57 | 679 | struct nlattr *start; |
ccb1352e | 680 | struct ovs_flow_stats stats; |
e298e505 PS |
681 | __be16 tcp_flags; |
682 | unsigned long used; | |
ccb1352e JG |
683 | struct ovs_header *ovs_header; |
684 | struct nlattr *nla; | |
ccb1352e JG |
685 | int err; |
686 | ||
15e47304 | 687 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
ccb1352e JG |
688 | if (!ovs_header) |
689 | return -EMSGSIZE; | |
690 | ||
0e9796b4 | 691 | ovs_header->dp_ifindex = dp_ifindex; |
ccb1352e | 692 | |
03f0d916 | 693 | /* Fill flow key. */ |
ccb1352e JG |
694 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
695 | if (!nla) | |
696 | goto nla_put_failure; | |
03f0d916 | 697 | |
e6445719 | 698 | err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb); |
03f0d916 AZ |
699 | if (err) |
700 | goto error; | |
701 | nla_nest_end(skb, nla); | |
702 | ||
703 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); | |
704 | if (!nla) | |
705 | goto nla_put_failure; | |
706 | ||
e6445719 | 707 | err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb); |
ccb1352e JG |
708 | if (err) |
709 | goto error; | |
03f0d916 | 710 | |
ccb1352e JG |
711 | nla_nest_end(skb, nla); |
712 | ||
e298e505 | 713 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 714 | |
028d6a67 DM |
715 | if (used && |
716 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
717 | goto nla_put_failure; | |
ccb1352e | 718 | |
028d6a67 | 719 | if (stats.n_packets && |
e298e505 | 720 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) |
028d6a67 | 721 | goto nla_put_failure; |
ccb1352e | 722 | |
e298e505 PS |
723 | if ((u8)ntohs(tcp_flags) && |
724 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
028d6a67 | 725 | goto nla_put_failure; |
ccb1352e JG |
726 | |
727 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
728 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
729 | * Netlink but individual action lists can be longer than | |
730 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
731 | * The userspace caller can always fetch the actions separately if it | |
732 | * really wants them. (Most userspace callers in fact don't care.) | |
733 | * | |
734 | * This can only fail for dump operations because the skb is always | |
735 | * properly sized for single flows. | |
736 | */ | |
74f84a57 PS |
737 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
738 | if (start) { | |
d57170b1 PS |
739 | const struct sw_flow_actions *sf_acts; |
740 | ||
663efa36 | 741 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
742 | err = ovs_nla_put_actions(sf_acts->actions, |
743 | sf_acts->actions_len, skb); | |
0e9796b4 | 744 | |
74f84a57 PS |
745 | if (!err) |
746 | nla_nest_end(skb, start); | |
747 | else { | |
748 | if (skb_orig_len) | |
749 | goto error; | |
750 | ||
751 | nla_nest_cancel(skb, start); | |
752 | } | |
753 | } else if (skb_orig_len) | |
754 | goto nla_put_failure; | |
ccb1352e JG |
755 | |
756 | return genlmsg_end(skb, ovs_header); | |
757 | ||
758 | nla_put_failure: | |
759 | err = -EMSGSIZE; | |
760 | error: | |
761 | genlmsg_cancel(skb, ovs_header); | |
762 | return err; | |
763 | } | |
764 | ||
0e9796b4 JR |
765 | /* May not be called with RCU read lock. */ |
766 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
fb5d1e9e JR |
767 | struct genl_info *info, |
768 | bool always) | |
ccb1352e | 769 | { |
fb5d1e9e | 770 | struct sk_buff *skb; |
ccb1352e | 771 | |
9b67aa4a | 772 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
773 | return NULL; |
774 | ||
0e9796b4 | 775 | skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL); |
fb5d1e9e JR |
776 | if (!skb) |
777 | return ERR_PTR(-ENOMEM); | |
778 | ||
779 | return skb; | |
ccb1352e JG |
780 | } |
781 | ||
0e9796b4 JR |
782 | /* Called with ovs_mutex. */ |
783 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
784 | int dp_ifindex, | |
785 | struct genl_info *info, u8 cmd, | |
786 | bool always) | |
ccb1352e JG |
787 | { |
788 | struct sk_buff *skb; | |
789 | int retval; | |
790 | ||
0e9796b4 JR |
791 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info, |
792 | always); | |
d0e992aa | 793 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 794 | return skb; |
ccb1352e | 795 | |
0e9796b4 JR |
796 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
797 | info->snd_portid, info->snd_seq, 0, | |
798 | cmd); | |
ccb1352e JG |
799 | BUG_ON(retval < 0); |
800 | return skb; | |
801 | } | |
802 | ||
37bdc87b | 803 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e JG |
804 | { |
805 | struct nlattr **a = info->attrs; | |
806 | struct ovs_header *ovs_header = info->userhdr; | |
893f139b | 807 | struct sw_flow *flow, *new_flow; |
03f0d916 | 808 | struct sw_flow_mask mask; |
ccb1352e JG |
809 | struct sk_buff *reply; |
810 | struct datapath *dp; | |
37bdc87b | 811 | struct sw_flow_actions *acts; |
03f0d916 | 812 | struct sw_flow_match match; |
ccb1352e | 813 | int error; |
ccb1352e | 814 | |
893f139b | 815 | /* Must have key and actions. */ |
ccb1352e JG |
816 | error = -EINVAL; |
817 | if (!a[OVS_FLOW_ATTR_KEY]) | |
818 | goto error; | |
893f139b JR |
819 | if (!a[OVS_FLOW_ATTR_ACTIONS]) |
820 | goto error; | |
03f0d916 | 821 | |
893f139b JR |
822 | /* Most of the time we need to allocate a new flow, do it before |
823 | * locking. | |
824 | */ | |
825 | new_flow = ovs_flow_alloc(); | |
826 | if (IS_ERR(new_flow)) { | |
827 | error = PTR_ERR(new_flow); | |
828 | goto error; | |
829 | } | |
830 | ||
831 | /* Extract key. */ | |
832 | ovs_match_init(&match, &new_flow->unmasked_key, &mask); | |
23dabf88 | 833 | error = ovs_nla_get_match(&match, |
e6445719 | 834 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); |
ccb1352e | 835 | if (error) |
893f139b | 836 | goto err_kfree_flow; |
ccb1352e | 837 | |
893f139b | 838 | ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask); |
74f84a57 | 839 | |
893f139b | 840 | /* Validate actions. */ |
37bdc87b JR |
841 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
842 | error = PTR_ERR(acts); | |
843 | if (IS_ERR(acts)) | |
893f139b | 844 | goto err_kfree_flow; |
37bdc87b | 845 | |
893f139b JR |
846 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key, |
847 | 0, &acts); | |
37bdc87b JR |
848 | if (error) { |
849 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
893f139b JR |
850 | goto err_kfree_acts; |
851 | } | |
852 | ||
853 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
854 | if (IS_ERR(reply)) { | |
855 | error = PTR_ERR(reply); | |
856 | goto err_kfree_acts; | |
ccb1352e JG |
857 | } |
858 | ||
8e4e1713 | 859 | ovs_lock(); |
46df7b81 | 860 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
893f139b JR |
861 | if (unlikely(!dp)) { |
862 | error = -ENODEV; | |
8e4e1713 | 863 | goto err_unlock_ovs; |
893f139b | 864 | } |
03f0d916 | 865 | /* Check if this is a duplicate flow */ |
893f139b JR |
866 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key); |
867 | if (likely(!flow)) { | |
868 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
869 | |
870 | /* Put flow in bucket. */ | |
893f139b JR |
871 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
872 | if (unlikely(error)) { | |
618ed0c8 | 873 | acts = NULL; |
893f139b JR |
874 | goto err_unlock_ovs; |
875 | } | |
876 | ||
877 | if (unlikely(reply)) { | |
878 | error = ovs_flow_cmd_fill_info(new_flow, | |
879 | ovs_header->dp_ifindex, | |
880 | reply, info->snd_portid, | |
881 | info->snd_seq, 0, | |
882 | OVS_FLOW_CMD_NEW); | |
883 | BUG_ON(error < 0); | |
618ed0c8 | 884 | } |
893f139b | 885 | ovs_unlock(); |
ccb1352e | 886 | } else { |
37bdc87b JR |
887 | struct sw_flow_actions *old_acts; |
888 | ||
ccb1352e JG |
889 | /* Bail out if we're not allowed to modify an existing flow. |
890 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
891 | * because Generic Netlink treats the latter as a dump | |
892 | * request. We also accept NLM_F_EXCL in case that bug ever | |
893 | * gets fixed. | |
894 | */ | |
893f139b JR |
895 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
896 | | NLM_F_EXCL))) { | |
897 | error = -EEXIST; | |
8e4e1713 | 898 | goto err_unlock_ovs; |
893f139b | 899 | } |
03f0d916 | 900 | /* The unmasked key has to be the same for flow updates. */ |
893f139b | 901 | if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) { |
4a46b24e AW |
902 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
903 | if (!flow) { | |
904 | error = -ENOENT; | |
905 | goto err_unlock_ovs; | |
906 | } | |
893f139b | 907 | } |
37bdc87b JR |
908 | /* Update actions. */ |
909 | old_acts = ovsl_dereference(flow->sf_acts); | |
910 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 911 | |
893f139b JR |
912 | if (unlikely(reply)) { |
913 | error = ovs_flow_cmd_fill_info(flow, | |
914 | ovs_header->dp_ifindex, | |
915 | reply, info->snd_portid, | |
916 | info->snd_seq, 0, | |
917 | OVS_FLOW_CMD_NEW); | |
918 | BUG_ON(error < 0); | |
919 | } | |
920 | ovs_unlock(); | |
37bdc87b | 921 | |
893f139b JR |
922 | ovs_nla_free_flow_actions(old_acts); |
923 | ovs_flow_free(new_flow, false); | |
37bdc87b | 924 | } |
893f139b JR |
925 | |
926 | if (reply) | |
927 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
928 | return 0; |
929 | ||
37bdc87b JR |
930 | err_unlock_ovs: |
931 | ovs_unlock(); | |
893f139b JR |
932 | kfree_skb(reply); |
933 | err_kfree_acts: | |
37bdc87b | 934 | kfree(acts); |
893f139b JR |
935 | err_kfree_flow: |
936 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
937 | error: |
938 | return error; | |
939 | } | |
ccb1352e | 940 | |
6b205b2c JG |
941 | static struct sw_flow_actions *get_flow_actions(const struct nlattr *a, |
942 | const struct sw_flow_key *key, | |
943 | const struct sw_flow_mask *mask) | |
944 | { | |
945 | struct sw_flow_actions *acts; | |
946 | struct sw_flow_key masked_key; | |
947 | int error; | |
948 | ||
949 | acts = ovs_nla_alloc_flow_actions(nla_len(a)); | |
950 | if (IS_ERR(acts)) | |
951 | return acts; | |
952 | ||
953 | ovs_flow_mask_key(&masked_key, key, mask); | |
954 | error = ovs_nla_copy_actions(a, &masked_key, 0, &acts); | |
955 | if (error) { | |
956 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
957 | kfree(acts); | |
958 | return ERR_PTR(error); | |
959 | } | |
960 | ||
961 | return acts; | |
962 | } | |
963 | ||
37bdc87b JR |
964 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
965 | { | |
966 | struct nlattr **a = info->attrs; | |
967 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 968 | struct sw_flow_key key; |
37bdc87b JR |
969 | struct sw_flow *flow; |
970 | struct sw_flow_mask mask; | |
971 | struct sk_buff *reply = NULL; | |
972 | struct datapath *dp; | |
893f139b | 973 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b JR |
974 | struct sw_flow_match match; |
975 | int error; | |
976 | ||
977 | /* Extract key. */ | |
978 | error = -EINVAL; | |
979 | if (!a[OVS_FLOW_ATTR_KEY]) | |
980 | goto error; | |
981 | ||
982 | ovs_match_init(&match, &key, &mask); | |
983 | error = ovs_nla_get_match(&match, | |
984 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); | |
985 | if (error) | |
986 | goto error; | |
987 | ||
988 | /* Validate actions. */ | |
989 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
6b205b2c JG |
990 | acts = get_flow_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, &mask); |
991 | if (IS_ERR(acts)) { | |
992 | error = PTR_ERR(acts); | |
37bdc87b | 993 | goto error; |
893f139b JR |
994 | } |
995 | } | |
996 | ||
997 | /* Can allocate before locking if have acts. */ | |
998 | if (acts) { | |
999 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
1000 | if (IS_ERR(reply)) { | |
1001 | error = PTR_ERR(reply); | |
1002 | goto err_kfree_acts; | |
be52c9e9 | 1003 | } |
37bdc87b | 1004 | } |
0e9796b4 | 1005 | |
37bdc87b JR |
1006 | ovs_lock(); |
1007 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
893f139b JR |
1008 | if (unlikely(!dp)) { |
1009 | error = -ENODEV; | |
37bdc87b | 1010 | goto err_unlock_ovs; |
893f139b | 1011 | } |
37bdc87b | 1012 | /* Check that the flow exists. */ |
4a46b24e | 1013 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
893f139b JR |
1014 | if (unlikely(!flow)) { |
1015 | error = -ENOENT; | |
37bdc87b | 1016 | goto err_unlock_ovs; |
893f139b | 1017 | } |
4a46b24e | 1018 | |
37bdc87b | 1019 | /* Update actions, if present. */ |
893f139b | 1020 | if (likely(acts)) { |
37bdc87b JR |
1021 | old_acts = ovsl_dereference(flow->sf_acts); |
1022 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1023 | |
1024 | if (unlikely(reply)) { | |
1025 | error = ovs_flow_cmd_fill_info(flow, | |
1026 | ovs_header->dp_ifindex, | |
1027 | reply, info->snd_portid, | |
1028 | info->snd_seq, 0, | |
1029 | OVS_FLOW_CMD_NEW); | |
1030 | BUG_ON(error < 0); | |
1031 | } | |
1032 | } else { | |
1033 | /* Could not alloc without acts before locking. */ | |
1034 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
1035 | info, OVS_FLOW_CMD_NEW, false); | |
1036 | if (unlikely(IS_ERR(reply))) { | |
1037 | error = PTR_ERR(reply); | |
1038 | goto err_unlock_ovs; | |
1039 | } | |
ccb1352e | 1040 | } |
37bdc87b | 1041 | |
37bdc87b JR |
1042 | /* Clear stats. */ |
1043 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1044 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1045 | ovs_unlock(); |
ccb1352e | 1046 | |
893f139b JR |
1047 | if (reply) |
1048 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1049 | if (old_acts) | |
1050 | ovs_nla_free_flow_actions(old_acts); | |
fb5d1e9e | 1051 | |
ccb1352e JG |
1052 | return 0; |
1053 | ||
8e4e1713 PS |
1054 | err_unlock_ovs: |
1055 | ovs_unlock(); | |
893f139b JR |
1056 | kfree_skb(reply); |
1057 | err_kfree_acts: | |
74f84a57 | 1058 | kfree(acts); |
ccb1352e JG |
1059 | error: |
1060 | return error; | |
1061 | } | |
1062 | ||
1063 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1064 | { | |
1065 | struct nlattr **a = info->attrs; | |
1066 | struct ovs_header *ovs_header = info->userhdr; | |
1067 | struct sw_flow_key key; | |
1068 | struct sk_buff *reply; | |
1069 | struct sw_flow *flow; | |
1070 | struct datapath *dp; | |
03f0d916 | 1071 | struct sw_flow_match match; |
ccb1352e | 1072 | int err; |
ccb1352e | 1073 | |
03f0d916 AZ |
1074 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1075 | OVS_NLERR("Flow get message rejected, Key attribute missing.\n"); | |
ccb1352e | 1076 | return -EINVAL; |
03f0d916 AZ |
1077 | } |
1078 | ||
1079 | ovs_match_init(&match, &key, NULL); | |
23dabf88 | 1080 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL); |
ccb1352e JG |
1081 | if (err) |
1082 | return err; | |
1083 | ||
8e4e1713 | 1084 | ovs_lock(); |
46df7b81 | 1085 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1086 | if (!dp) { |
1087 | err = -ENODEV; | |
1088 | goto unlock; | |
1089 | } | |
ccb1352e | 1090 | |
4a46b24e AW |
1091 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1092 | if (!flow) { | |
8e4e1713 PS |
1093 | err = -ENOENT; |
1094 | goto unlock; | |
1095 | } | |
ccb1352e | 1096 | |
0e9796b4 JR |
1097 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
1098 | OVS_FLOW_CMD_NEW, true); | |
8e4e1713 PS |
1099 | if (IS_ERR(reply)) { |
1100 | err = PTR_ERR(reply); | |
1101 | goto unlock; | |
1102 | } | |
ccb1352e | 1103 | |
8e4e1713 | 1104 | ovs_unlock(); |
ccb1352e | 1105 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1106 | unlock: |
1107 | ovs_unlock(); | |
1108 | return err; | |
ccb1352e JG |
1109 | } |
1110 | ||
1111 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1112 | { | |
1113 | struct nlattr **a = info->attrs; | |
1114 | struct ovs_header *ovs_header = info->userhdr; | |
1115 | struct sw_flow_key key; | |
1116 | struct sk_buff *reply; | |
1117 | struct sw_flow *flow; | |
1118 | struct datapath *dp; | |
03f0d916 | 1119 | struct sw_flow_match match; |
ccb1352e | 1120 | int err; |
ccb1352e | 1121 | |
aed06778 JR |
1122 | if (likely(a[OVS_FLOW_ATTR_KEY])) { |
1123 | ovs_match_init(&match, &key, NULL); | |
1124 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL); | |
1125 | if (unlikely(err)) | |
1126 | return err; | |
1127 | } | |
1128 | ||
8e4e1713 | 1129 | ovs_lock(); |
46df7b81 | 1130 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1131 | if (unlikely(!dp)) { |
8e4e1713 PS |
1132 | err = -ENODEV; |
1133 | goto unlock; | |
1134 | } | |
46df7b81 | 1135 | |
aed06778 | 1136 | if (unlikely(!a[OVS_FLOW_ATTR_KEY])) { |
b637e498 | 1137 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1138 | goto unlock; |
1139 | } | |
03f0d916 | 1140 | |
4a46b24e AW |
1141 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1142 | if (unlikely(!flow)) { | |
8e4e1713 PS |
1143 | err = -ENOENT; |
1144 | goto unlock; | |
1145 | } | |
ccb1352e | 1146 | |
b637e498 | 1147 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1148 | ovs_unlock(); |
ccb1352e | 1149 | |
aed06778 JR |
1150 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
1151 | info, false); | |
1152 | if (likely(reply)) { | |
1153 | if (likely(!IS_ERR(reply))) { | |
1154 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1155 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1156 | reply, info->snd_portid, | |
1157 | info->snd_seq, 0, | |
1158 | OVS_FLOW_CMD_DEL); | |
1159 | rcu_read_unlock(); | |
1160 | BUG_ON(err < 0); | |
1161 | ||
1162 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1163 | } else { | |
1164 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1165 | } | |
fb5d1e9e | 1166 | } |
ccb1352e | 1167 | |
aed06778 | 1168 | ovs_flow_free(flow, true); |
ccb1352e | 1169 | return 0; |
8e4e1713 PS |
1170 | unlock: |
1171 | ovs_unlock(); | |
1172 | return err; | |
ccb1352e JG |
1173 | } |
1174 | ||
1175 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1176 | { | |
1177 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
b637e498 | 1178 | struct table_instance *ti; |
ccb1352e | 1179 | struct datapath *dp; |
ccb1352e | 1180 | |
d57170b1 | 1181 | rcu_read_lock(); |
46df7b81 | 1182 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1183 | if (!dp) { |
d57170b1 | 1184 | rcu_read_unlock(); |
ccb1352e | 1185 | return -ENODEV; |
8e4e1713 | 1186 | } |
ccb1352e | 1187 | |
b637e498 | 1188 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1189 | for (;;) { |
1190 | struct sw_flow *flow; | |
1191 | u32 bucket, obj; | |
1192 | ||
1193 | bucket = cb->args[0]; | |
1194 | obj = cb->args[1]; | |
b637e498 | 1195 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1196 | if (!flow) |
1197 | break; | |
1198 | ||
0e9796b4 | 1199 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1200 | NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1201 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1202 | OVS_FLOW_CMD_NEW) < 0) | |
1203 | break; | |
1204 | ||
1205 | cb->args[0] = bucket; | |
1206 | cb->args[1] = obj; | |
1207 | } | |
d57170b1 | 1208 | rcu_read_unlock(); |
ccb1352e JG |
1209 | return skb->len; |
1210 | } | |
1211 | ||
0c200ef9 PS |
1212 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1213 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
1214 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1215 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
1216 | }; | |
1217 | ||
48e48a70 | 1218 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e JG |
1219 | { .cmd = OVS_FLOW_CMD_NEW, |
1220 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1221 | .policy = flow_policy, | |
37bdc87b | 1222 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1223 | }, |
1224 | { .cmd = OVS_FLOW_CMD_DEL, | |
1225 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1226 | .policy = flow_policy, | |
1227 | .doit = ovs_flow_cmd_del | |
1228 | }, | |
1229 | { .cmd = OVS_FLOW_CMD_GET, | |
1230 | .flags = 0, /* OK for unprivileged users. */ | |
1231 | .policy = flow_policy, | |
1232 | .doit = ovs_flow_cmd_get, | |
1233 | .dumpit = ovs_flow_cmd_dump | |
1234 | }, | |
1235 | { .cmd = OVS_FLOW_CMD_SET, | |
1236 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1237 | .policy = flow_policy, | |
37bdc87b | 1238 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1239 | }, |
1240 | }; | |
1241 | ||
0c200ef9 | 1242 | static struct genl_family dp_flow_genl_family = { |
ccb1352e JG |
1243 | .id = GENL_ID_GENERATE, |
1244 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1245 | .name = OVS_FLOW_FAMILY, |
1246 | .version = OVS_FLOW_VERSION, | |
1247 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3a4e0d6a PS |
1248 | .netnsok = true, |
1249 | .parallel_ops = true, | |
0c200ef9 PS |
1250 | .ops = dp_flow_genl_ops, |
1251 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1252 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1253 | .n_mcgrps = 1, | |
ccb1352e JG |
1254 | }; |
1255 | ||
c3ff8cfe TG |
1256 | static size_t ovs_dp_cmd_msg_size(void) |
1257 | { | |
1258 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1259 | ||
1260 | msgsize += nla_total_size(IFNAMSIZ); | |
1261 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1bd7116f | 1262 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
45fb9c35 | 1263 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1264 | |
1265 | return msgsize; | |
1266 | } | |
1267 | ||
bb6f9a70 | 1268 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1269 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1270 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1271 | { |
1272 | struct ovs_header *ovs_header; | |
1273 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1274 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1275 | int err; |
1276 | ||
15e47304 | 1277 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1278 | flags, cmd); |
1279 | if (!ovs_header) | |
1280 | goto error; | |
1281 | ||
1282 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1283 | ||
ccb1352e | 1284 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1285 | if (err) |
1286 | goto nla_put_failure; | |
1287 | ||
1bd7116f AZ |
1288 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1289 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1290 | &dp_stats)) | |
1291 | goto nla_put_failure; | |
1292 | ||
1293 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1294 | sizeof(struct ovs_dp_megaflow_stats), | |
1295 | &dp_megaflow_stats)) | |
028d6a67 | 1296 | goto nla_put_failure; |
ccb1352e | 1297 | |
43d4be9c TG |
1298 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1299 | goto nla_put_failure; | |
1300 | ||
ccb1352e JG |
1301 | return genlmsg_end(skb, ovs_header); |
1302 | ||
1303 | nla_put_failure: | |
1304 | genlmsg_cancel(skb, ovs_header); | |
1305 | error: | |
1306 | return -EMSGSIZE; | |
1307 | } | |
1308 | ||
6093ae9a | 1309 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
ccb1352e | 1310 | { |
6093ae9a | 1311 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
ccb1352e JG |
1312 | } |
1313 | ||
bb6f9a70 | 1314 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 PS |
1315 | static struct datapath *lookup_datapath(struct net *net, |
1316 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1317 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1318 | { | |
1319 | struct datapath *dp; | |
1320 | ||
1321 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1322 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1323 | else { |
1324 | struct vport *vport; | |
1325 | ||
46df7b81 | 1326 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1327 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1328 | } |
1329 | return dp ? dp : ERR_PTR(-ENODEV); | |
1330 | } | |
1331 | ||
44da5ae5 TG |
1332 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1333 | { | |
1334 | struct datapath *dp; | |
1335 | ||
1336 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1337 | if (IS_ERR(dp)) |
44da5ae5 TG |
1338 | return; |
1339 | ||
1340 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1341 | dp->user_features = 0; | |
1342 | } | |
1343 | ||
43d4be9c TG |
1344 | static void ovs_dp_change(struct datapath *dp, struct nlattr **a) |
1345 | { | |
1346 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1347 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1348 | } | |
1349 | ||
ccb1352e JG |
1350 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1351 | { | |
1352 | struct nlattr **a = info->attrs; | |
1353 | struct vport_parms parms; | |
1354 | struct sk_buff *reply; | |
1355 | struct datapath *dp; | |
1356 | struct vport *vport; | |
46df7b81 | 1357 | struct ovs_net *ovs_net; |
15eac2a7 | 1358 | int err, i; |
ccb1352e JG |
1359 | |
1360 | err = -EINVAL; | |
1361 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1362 | goto err; | |
1363 | ||
6093ae9a JR |
1364 | reply = ovs_dp_cmd_alloc_info(info); |
1365 | if (!reply) | |
1366 | return -ENOMEM; | |
ccb1352e JG |
1367 | |
1368 | err = -ENOMEM; | |
1369 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1370 | if (dp == NULL) | |
6093ae9a | 1371 | goto err_free_reply; |
46df7b81 | 1372 | |
46df7b81 | 1373 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
ccb1352e JG |
1374 | |
1375 | /* Allocate table. */ | |
b637e498 PS |
1376 | err = ovs_flow_tbl_init(&dp->table); |
1377 | if (err) | |
ccb1352e JG |
1378 | goto err_free_dp; |
1379 | ||
1c213bd2 | 1380 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1381 | if (!dp->stats_percpu) { |
1382 | err = -ENOMEM; | |
1383 | goto err_destroy_table; | |
1384 | } | |
1385 | ||
15eac2a7 | 1386 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
e6445719 | 1387 | GFP_KERNEL); |
15eac2a7 PS |
1388 | if (!dp->ports) { |
1389 | err = -ENOMEM; | |
1390 | goto err_destroy_percpu; | |
1391 | } | |
1392 | ||
1393 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1394 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1395 | ||
ccb1352e JG |
1396 | /* Set up our datapath device. */ |
1397 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1398 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1399 | parms.options = NULL; | |
1400 | parms.dp = dp; | |
1401 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1402 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1403 | |
43d4be9c TG |
1404 | ovs_dp_change(dp, a); |
1405 | ||
6093ae9a JR |
1406 | /* So far only local changes have been made, now need the lock. */ |
1407 | ovs_lock(); | |
1408 | ||
ccb1352e JG |
1409 | vport = new_vport(&parms); |
1410 | if (IS_ERR(vport)) { | |
1411 | err = PTR_ERR(vport); | |
1412 | if (err == -EBUSY) | |
1413 | err = -EEXIST; | |
1414 | ||
44da5ae5 TG |
1415 | if (err == -EEXIST) { |
1416 | /* An outdated user space instance that does not understand | |
1417 | * the concept of user_features has attempted to create a new | |
1418 | * datapath and is likely to reuse it. Drop all user features. | |
1419 | */ | |
1420 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1421 | ovs_dp_reset_user_features(skb, info); | |
1422 | } | |
1423 | ||
15eac2a7 | 1424 | goto err_destroy_ports_array; |
ccb1352e JG |
1425 | } |
1426 | ||
6093ae9a JR |
1427 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1428 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1429 | BUG_ON(err < 0); | |
ccb1352e | 1430 | |
46df7b81 | 1431 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1432 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1433 | |
1434 | ovs_unlock(); | |
ccb1352e | 1435 | |
2a94fe48 | 1436 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1437 | return 0; |
1438 | ||
15eac2a7 | 1439 | err_destroy_ports_array: |
6093ae9a | 1440 | ovs_unlock(); |
15eac2a7 | 1441 | kfree(dp->ports); |
ccb1352e JG |
1442 | err_destroy_percpu: |
1443 | free_percpu(dp->stats_percpu); | |
1444 | err_destroy_table: | |
e80857cc | 1445 | ovs_flow_tbl_destroy(&dp->table, false); |
ccb1352e | 1446 | err_free_dp: |
46df7b81 | 1447 | release_net(ovs_dp_get_net(dp)); |
ccb1352e | 1448 | kfree(dp); |
6093ae9a JR |
1449 | err_free_reply: |
1450 | kfree_skb(reply); | |
ccb1352e JG |
1451 | err: |
1452 | return err; | |
1453 | } | |
1454 | ||
8e4e1713 | 1455 | /* Called with ovs_mutex. */ |
46df7b81 | 1456 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1457 | { |
15eac2a7 | 1458 | int i; |
ccb1352e | 1459 | |
15eac2a7 PS |
1460 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1461 | struct vport *vport; | |
b67bfe0d | 1462 | struct hlist_node *n; |
15eac2a7 | 1463 | |
b67bfe0d | 1464 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1465 | if (vport->port_no != OVSP_LOCAL) |
1466 | ovs_dp_detach_port(vport); | |
1467 | } | |
ccb1352e | 1468 | |
59a35d60 | 1469 | list_del_rcu(&dp->list_node); |
ccb1352e | 1470 | |
8e4e1713 | 1471 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1472 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1473 | */ |
8e4e1713 | 1474 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1475 | |
e80857cc AZ |
1476 | /* RCU destroy the flow table */ |
1477 | ovs_flow_tbl_destroy(&dp->table, true); | |
1478 | ||
ccb1352e | 1479 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1480 | } |
1481 | ||
1482 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1483 | { | |
1484 | struct sk_buff *reply; | |
1485 | struct datapath *dp; | |
1486 | int err; | |
1487 | ||
6093ae9a JR |
1488 | reply = ovs_dp_cmd_alloc_info(info); |
1489 | if (!reply) | |
1490 | return -ENOMEM; | |
1491 | ||
8e4e1713 | 1492 | ovs_lock(); |
46df7b81 PS |
1493 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1494 | err = PTR_ERR(dp); | |
1495 | if (IS_ERR(dp)) | |
6093ae9a | 1496 | goto err_unlock_free; |
46df7b81 | 1497 | |
6093ae9a JR |
1498 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1499 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1500 | BUG_ON(err < 0); | |
46df7b81 PS |
1501 | |
1502 | __dp_destroy(dp); | |
8e4e1713 | 1503 | ovs_unlock(); |
ccb1352e | 1504 | |
2a94fe48 | 1505 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1506 | |
1507 | return 0; | |
6093ae9a JR |
1508 | |
1509 | err_unlock_free: | |
8e4e1713 | 1510 | ovs_unlock(); |
6093ae9a | 1511 | kfree_skb(reply); |
8e4e1713 | 1512 | return err; |
ccb1352e JG |
1513 | } |
1514 | ||
1515 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1516 | { | |
1517 | struct sk_buff *reply; | |
1518 | struct datapath *dp; | |
1519 | int err; | |
1520 | ||
6093ae9a JR |
1521 | reply = ovs_dp_cmd_alloc_info(info); |
1522 | if (!reply) | |
1523 | return -ENOMEM; | |
1524 | ||
8e4e1713 | 1525 | ovs_lock(); |
46df7b81 | 1526 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1527 | err = PTR_ERR(dp); |
ccb1352e | 1528 | if (IS_ERR(dp)) |
6093ae9a | 1529 | goto err_unlock_free; |
ccb1352e | 1530 | |
43d4be9c TG |
1531 | ovs_dp_change(dp, info->attrs); |
1532 | ||
6093ae9a JR |
1533 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1534 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1535 | BUG_ON(err < 0); | |
ccb1352e | 1536 | |
8e4e1713 | 1537 | ovs_unlock(); |
2a94fe48 | 1538 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1539 | |
1540 | return 0; | |
6093ae9a JR |
1541 | |
1542 | err_unlock_free: | |
8e4e1713 | 1543 | ovs_unlock(); |
6093ae9a | 1544 | kfree_skb(reply); |
8e4e1713 | 1545 | return err; |
ccb1352e JG |
1546 | } |
1547 | ||
1548 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1549 | { | |
1550 | struct sk_buff *reply; | |
1551 | struct datapath *dp; | |
8e4e1713 | 1552 | int err; |
ccb1352e | 1553 | |
6093ae9a JR |
1554 | reply = ovs_dp_cmd_alloc_info(info); |
1555 | if (!reply) | |
1556 | return -ENOMEM; | |
1557 | ||
1558 | rcu_read_lock(); | |
46df7b81 | 1559 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1560 | if (IS_ERR(dp)) { |
1561 | err = PTR_ERR(dp); | |
6093ae9a | 1562 | goto err_unlock_free; |
8e4e1713 | 1563 | } |
6093ae9a JR |
1564 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1565 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1566 | BUG_ON(err < 0); | |
1567 | rcu_read_unlock(); | |
ccb1352e JG |
1568 | |
1569 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1570 | |
6093ae9a JR |
1571 | err_unlock_free: |
1572 | rcu_read_unlock(); | |
1573 | kfree_skb(reply); | |
8e4e1713 | 1574 | return err; |
ccb1352e JG |
1575 | } |
1576 | ||
1577 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1578 | { | |
46df7b81 | 1579 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1580 | struct datapath *dp; |
1581 | int skip = cb->args[0]; | |
1582 | int i = 0; | |
1583 | ||
59a35d60 PS |
1584 | rcu_read_lock(); |
1585 | list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1586 | if (i >= skip && |
15e47304 | 1587 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1588 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1589 | OVS_DP_CMD_NEW) < 0) | |
1590 | break; | |
1591 | i++; | |
1592 | } | |
59a35d60 | 1593 | rcu_read_unlock(); |
ccb1352e JG |
1594 | |
1595 | cb->args[0] = i; | |
1596 | ||
1597 | return skb->len; | |
1598 | } | |
1599 | ||
0c200ef9 PS |
1600 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1601 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1602 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1603 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1604 | }; | |
1605 | ||
48e48a70 | 1606 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e JG |
1607 | { .cmd = OVS_DP_CMD_NEW, |
1608 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1609 | .policy = datapath_policy, | |
1610 | .doit = ovs_dp_cmd_new | |
1611 | }, | |
1612 | { .cmd = OVS_DP_CMD_DEL, | |
1613 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1614 | .policy = datapath_policy, | |
1615 | .doit = ovs_dp_cmd_del | |
1616 | }, | |
1617 | { .cmd = OVS_DP_CMD_GET, | |
1618 | .flags = 0, /* OK for unprivileged users. */ | |
1619 | .policy = datapath_policy, | |
1620 | .doit = ovs_dp_cmd_get, | |
1621 | .dumpit = ovs_dp_cmd_dump | |
1622 | }, | |
1623 | { .cmd = OVS_DP_CMD_SET, | |
1624 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1625 | .policy = datapath_policy, | |
1626 | .doit = ovs_dp_cmd_set, | |
1627 | }, | |
1628 | }; | |
1629 | ||
0c200ef9 | 1630 | static struct genl_family dp_datapath_genl_family = { |
ccb1352e JG |
1631 | .id = GENL_ID_GENERATE, |
1632 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1633 | .name = OVS_DATAPATH_FAMILY, |
1634 | .version = OVS_DATAPATH_VERSION, | |
1635 | .maxattr = OVS_DP_ATTR_MAX, | |
3a4e0d6a PS |
1636 | .netnsok = true, |
1637 | .parallel_ops = true, | |
0c200ef9 PS |
1638 | .ops = dp_datapath_genl_ops, |
1639 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1640 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1641 | .n_mcgrps = 1, | |
ccb1352e JG |
1642 | }; |
1643 | ||
8e4e1713 | 1644 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1645 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1646 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1647 | { |
1648 | struct ovs_header *ovs_header; | |
1649 | struct ovs_vport_stats vport_stats; | |
1650 | int err; | |
1651 | ||
15e47304 | 1652 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1653 | flags, cmd); |
1654 | if (!ovs_header) | |
1655 | return -EMSGSIZE; | |
1656 | ||
1657 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1658 | ||
028d6a67 DM |
1659 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1660 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 AW |
1661 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
1662 | vport->ops->get_name(vport))) | |
028d6a67 | 1663 | goto nla_put_failure; |
ccb1352e JG |
1664 | |
1665 | ovs_vport_get_stats(vport, &vport_stats); | |
028d6a67 DM |
1666 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1667 | &vport_stats)) | |
1668 | goto nla_put_failure; | |
ccb1352e | 1669 | |
5cd667b0 AW |
1670 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1671 | goto nla_put_failure; | |
1672 | ||
ccb1352e JG |
1673 | err = ovs_vport_get_options(vport, skb); |
1674 | if (err == -EMSGSIZE) | |
1675 | goto error; | |
1676 | ||
1677 | return genlmsg_end(skb, ovs_header); | |
1678 | ||
1679 | nla_put_failure: | |
1680 | err = -EMSGSIZE; | |
1681 | error: | |
1682 | genlmsg_cancel(skb, ovs_header); | |
1683 | return err; | |
1684 | } | |
1685 | ||
6093ae9a JR |
1686 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1687 | { | |
1688 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1689 | } | |
1690 | ||
1691 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
15e47304 | 1692 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1693 | u32 seq, u8 cmd) |
1694 | { | |
1695 | struct sk_buff *skb; | |
1696 | int retval; | |
1697 | ||
1698 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1699 | if (!skb) | |
1700 | return ERR_PTR(-ENOMEM); | |
1701 | ||
15e47304 | 1702 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1703 | BUG_ON(retval < 0); |
1704 | ||
ccb1352e JG |
1705 | return skb; |
1706 | } | |
1707 | ||
8e4e1713 | 1708 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 PS |
1709 | static struct vport *lookup_vport(struct net *net, |
1710 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1711 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1712 | { | |
1713 | struct datapath *dp; | |
1714 | struct vport *vport; | |
1715 | ||
1716 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1717 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1718 | if (!vport) |
1719 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1720 | if (ovs_header->dp_ifindex && |
1721 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1722 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1723 | return vport; |
1724 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1725 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1726 | ||
1727 | if (port_no >= DP_MAX_PORTS) | |
1728 | return ERR_PTR(-EFBIG); | |
1729 | ||
46df7b81 | 1730 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1731 | if (!dp) |
1732 | return ERR_PTR(-ENODEV); | |
1733 | ||
8e4e1713 | 1734 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1735 | if (!vport) |
14408dba | 1736 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1737 | return vport; |
1738 | } else | |
1739 | return ERR_PTR(-EINVAL); | |
1740 | } | |
1741 | ||
1742 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
1743 | { | |
1744 | struct nlattr **a = info->attrs; | |
1745 | struct ovs_header *ovs_header = info->userhdr; | |
1746 | struct vport_parms parms; | |
1747 | struct sk_buff *reply; | |
1748 | struct vport *vport; | |
1749 | struct datapath *dp; | |
1750 | u32 port_no; | |
1751 | int err; | |
1752 | ||
ccb1352e JG |
1753 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1754 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a JR |
1755 | return -EINVAL; |
1756 | ||
1757 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1758 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1759 | if (port_no >= DP_MAX_PORTS) | |
1760 | return -EFBIG; | |
1761 | ||
1762 | reply = ovs_vport_cmd_alloc_info(); | |
1763 | if (!reply) | |
1764 | return -ENOMEM; | |
ccb1352e | 1765 | |
8e4e1713 | 1766 | ovs_lock(); |
46df7b81 | 1767 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1768 | err = -ENODEV; |
1769 | if (!dp) | |
6093ae9a | 1770 | goto exit_unlock_free; |
ccb1352e | 1771 | |
6093ae9a | 1772 | if (port_no) { |
8e4e1713 | 1773 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1774 | err = -EBUSY; |
1775 | if (vport) | |
6093ae9a | 1776 | goto exit_unlock_free; |
ccb1352e JG |
1777 | } else { |
1778 | for (port_no = 1; ; port_no++) { | |
1779 | if (port_no >= DP_MAX_PORTS) { | |
1780 | err = -EFBIG; | |
6093ae9a | 1781 | goto exit_unlock_free; |
ccb1352e | 1782 | } |
8e4e1713 | 1783 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1784 | if (!vport) |
1785 | break; | |
1786 | } | |
1787 | } | |
1788 | ||
1789 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
1790 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1791 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
1792 | parms.dp = dp; | |
1793 | parms.port_no = port_no; | |
5cd667b0 | 1794 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
1795 | |
1796 | vport = new_vport(&parms); | |
1797 | err = PTR_ERR(vport); | |
1798 | if (IS_ERR(vport)) | |
6093ae9a | 1799 | goto exit_unlock_free; |
ccb1352e | 1800 | |
6093ae9a JR |
1801 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1802 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1803 | BUG_ON(err < 0); | |
1804 | ovs_unlock(); | |
ed661185 | 1805 | |
2a94fe48 | 1806 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1807 | return 0; |
ccb1352e | 1808 | |
6093ae9a | 1809 | exit_unlock_free: |
8e4e1713 | 1810 | ovs_unlock(); |
6093ae9a | 1811 | kfree_skb(reply); |
ccb1352e JG |
1812 | return err; |
1813 | } | |
1814 | ||
1815 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1816 | { | |
1817 | struct nlattr **a = info->attrs; | |
1818 | struct sk_buff *reply; | |
1819 | struct vport *vport; | |
1820 | int err; | |
1821 | ||
6093ae9a JR |
1822 | reply = ovs_vport_cmd_alloc_info(); |
1823 | if (!reply) | |
1824 | return -ENOMEM; | |
1825 | ||
8e4e1713 | 1826 | ovs_lock(); |
46df7b81 | 1827 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1828 | err = PTR_ERR(vport); |
1829 | if (IS_ERR(vport)) | |
6093ae9a | 1830 | goto exit_unlock_free; |
ccb1352e | 1831 | |
ccb1352e | 1832 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 1833 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 1834 | err = -EINVAL; |
6093ae9a | 1835 | goto exit_unlock_free; |
a9341512 JG |
1836 | } |
1837 | ||
f44f3408 | 1838 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 1839 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 1840 | if (err) |
6093ae9a | 1841 | goto exit_unlock_free; |
f44f3408 | 1842 | } |
a9341512 | 1843 | |
5cd667b0 AW |
1844 | |
1845 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
1846 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
1847 | ||
1848 | err = ovs_vport_set_upcall_portids(vport, ids); | |
1849 | if (err) | |
1850 | goto exit_unlock_free; | |
1851 | } | |
ccb1352e | 1852 | |
a9341512 JG |
1853 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1854 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1855 | BUG_ON(err < 0); | |
ccb1352e | 1856 | |
8e4e1713 | 1857 | ovs_unlock(); |
2a94fe48 | 1858 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 1859 | return 0; |
ccb1352e | 1860 | |
6093ae9a | 1861 | exit_unlock_free: |
8e4e1713 | 1862 | ovs_unlock(); |
6093ae9a | 1863 | kfree_skb(reply); |
ccb1352e JG |
1864 | return err; |
1865 | } | |
1866 | ||
1867 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1868 | { | |
1869 | struct nlattr **a = info->attrs; | |
1870 | struct sk_buff *reply; | |
1871 | struct vport *vport; | |
1872 | int err; | |
1873 | ||
6093ae9a JR |
1874 | reply = ovs_vport_cmd_alloc_info(); |
1875 | if (!reply) | |
1876 | return -ENOMEM; | |
1877 | ||
8e4e1713 | 1878 | ovs_lock(); |
46df7b81 | 1879 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1880 | err = PTR_ERR(vport); |
1881 | if (IS_ERR(vport)) | |
6093ae9a | 1882 | goto exit_unlock_free; |
ccb1352e JG |
1883 | |
1884 | if (vport->port_no == OVSP_LOCAL) { | |
1885 | err = -EINVAL; | |
6093ae9a | 1886 | goto exit_unlock_free; |
ccb1352e JG |
1887 | } |
1888 | ||
6093ae9a JR |
1889 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1890 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
1891 | BUG_ON(err < 0); | |
ccb1352e | 1892 | ovs_dp_detach_port(vport); |
6093ae9a | 1893 | ovs_unlock(); |
ccb1352e | 1894 | |
2a94fe48 | 1895 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1896 | return 0; |
ccb1352e | 1897 | |
6093ae9a | 1898 | exit_unlock_free: |
8e4e1713 | 1899 | ovs_unlock(); |
6093ae9a | 1900 | kfree_skb(reply); |
ccb1352e JG |
1901 | return err; |
1902 | } | |
1903 | ||
1904 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1905 | { | |
1906 | struct nlattr **a = info->attrs; | |
1907 | struct ovs_header *ovs_header = info->userhdr; | |
1908 | struct sk_buff *reply; | |
1909 | struct vport *vport; | |
1910 | int err; | |
1911 | ||
6093ae9a JR |
1912 | reply = ovs_vport_cmd_alloc_info(); |
1913 | if (!reply) | |
1914 | return -ENOMEM; | |
1915 | ||
ccb1352e | 1916 | rcu_read_lock(); |
46df7b81 | 1917 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
1918 | err = PTR_ERR(vport); |
1919 | if (IS_ERR(vport)) | |
6093ae9a JR |
1920 | goto exit_unlock_free; |
1921 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
1922 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1923 | BUG_ON(err < 0); | |
ccb1352e JG |
1924 | rcu_read_unlock(); |
1925 | ||
1926 | return genlmsg_reply(reply, info); | |
1927 | ||
6093ae9a | 1928 | exit_unlock_free: |
ccb1352e | 1929 | rcu_read_unlock(); |
6093ae9a | 1930 | kfree_skb(reply); |
ccb1352e JG |
1931 | return err; |
1932 | } | |
1933 | ||
1934 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1935 | { | |
1936 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
1937 | struct datapath *dp; | |
15eac2a7 PS |
1938 | int bucket = cb->args[0], skip = cb->args[1]; |
1939 | int i, j = 0; | |
ccb1352e | 1940 | |
42ee19e2 | 1941 | rcu_read_lock(); |
46df7b81 | 1942 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
1943 | if (!dp) { |
1944 | rcu_read_unlock(); | |
ccb1352e | 1945 | return -ENODEV; |
42ee19e2 | 1946 | } |
15eac2a7 | 1947 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 1948 | struct vport *vport; |
15eac2a7 PS |
1949 | |
1950 | j = 0; | |
b67bfe0d | 1951 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
1952 | if (j >= skip && |
1953 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 1954 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
1955 | cb->nlh->nlmsg_seq, |
1956 | NLM_F_MULTI, | |
1957 | OVS_VPORT_CMD_NEW) < 0) | |
1958 | goto out; | |
1959 | ||
1960 | j++; | |
1961 | } | |
1962 | skip = 0; | |
ccb1352e | 1963 | } |
15eac2a7 | 1964 | out: |
ccb1352e JG |
1965 | rcu_read_unlock(); |
1966 | ||
15eac2a7 PS |
1967 | cb->args[0] = i; |
1968 | cb->args[1] = j; | |
ccb1352e | 1969 | |
15eac2a7 | 1970 | return skb->len; |
ccb1352e JG |
1971 | } |
1972 | ||
0c200ef9 PS |
1973 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
1974 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1975 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
1976 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
1977 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
1978 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1979 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
1980 | }; | |
1981 | ||
48e48a70 | 1982 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e JG |
1983 | { .cmd = OVS_VPORT_CMD_NEW, |
1984 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1985 | .policy = vport_policy, | |
1986 | .doit = ovs_vport_cmd_new | |
1987 | }, | |
1988 | { .cmd = OVS_VPORT_CMD_DEL, | |
1989 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1990 | .policy = vport_policy, | |
1991 | .doit = ovs_vport_cmd_del | |
1992 | }, | |
1993 | { .cmd = OVS_VPORT_CMD_GET, | |
1994 | .flags = 0, /* OK for unprivileged users. */ | |
1995 | .policy = vport_policy, | |
1996 | .doit = ovs_vport_cmd_get, | |
1997 | .dumpit = ovs_vport_cmd_dump | |
1998 | }, | |
1999 | { .cmd = OVS_VPORT_CMD_SET, | |
2000 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2001 | .policy = vport_policy, | |
2002 | .doit = ovs_vport_cmd_set, | |
2003 | }, | |
2004 | }; | |
2005 | ||
0c200ef9 PS |
2006 | struct genl_family dp_vport_genl_family = { |
2007 | .id = GENL_ID_GENERATE, | |
2008 | .hdrsize = sizeof(struct ovs_header), | |
2009 | .name = OVS_VPORT_FAMILY, | |
2010 | .version = OVS_VPORT_VERSION, | |
2011 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2012 | .netnsok = true, | |
2013 | .parallel_ops = true, | |
2014 | .ops = dp_vport_genl_ops, | |
2015 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2016 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2017 | .n_mcgrps = 1, | |
ccb1352e JG |
2018 | }; |
2019 | ||
0c200ef9 PS |
2020 | static struct genl_family * const dp_genl_families[] = { |
2021 | &dp_datapath_genl_family, | |
2022 | &dp_vport_genl_family, | |
2023 | &dp_flow_genl_family, | |
2024 | &dp_packet_genl_family, | |
ccb1352e JG |
2025 | }; |
2026 | ||
2027 | static void dp_unregister_genl(int n_families) | |
2028 | { | |
2029 | int i; | |
2030 | ||
2031 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2032 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2033 | } |
2034 | ||
2035 | static int dp_register_genl(void) | |
2036 | { | |
ccb1352e JG |
2037 | int err; |
2038 | int i; | |
2039 | ||
ccb1352e | 2040 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2041 | |
0c200ef9 | 2042 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2043 | if (err) |
2044 | goto error; | |
ccb1352e JG |
2045 | } |
2046 | ||
2047 | return 0; | |
2048 | ||
2049 | error: | |
0c200ef9 | 2050 | dp_unregister_genl(i); |
ccb1352e JG |
2051 | return err; |
2052 | } | |
2053 | ||
46df7b81 PS |
2054 | static int __net_init ovs_init_net(struct net *net) |
2055 | { | |
2056 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2057 | ||
2058 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2059 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
46df7b81 PS |
2060 | return 0; |
2061 | } | |
2062 | ||
2063 | static void __net_exit ovs_exit_net(struct net *net) | |
2064 | { | |
46df7b81 | 2065 | struct datapath *dp, *dp_next; |
8e4e1713 | 2066 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
46df7b81 | 2067 | |
8e4e1713 | 2068 | ovs_lock(); |
46df7b81 PS |
2069 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2070 | __dp_destroy(dp); | |
8e4e1713 PS |
2071 | ovs_unlock(); |
2072 | ||
2073 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2074 | } |
2075 | ||
2076 | static struct pernet_operations ovs_net_ops = { | |
2077 | .init = ovs_init_net, | |
2078 | .exit = ovs_exit_net, | |
2079 | .id = &ovs_net_id, | |
2080 | .size = sizeof(struct ovs_net), | |
2081 | }; | |
2082 | ||
ccb1352e JG |
2083 | static int __init dp_init(void) |
2084 | { | |
ccb1352e JG |
2085 | int err; |
2086 | ||
3523b29b | 2087 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2088 | |
2089 | pr_info("Open vSwitch switching datapath\n"); | |
2090 | ||
971427f3 | 2091 | err = action_fifos_init(); |
ccb1352e JG |
2092 | if (err) |
2093 | goto error; | |
2094 | ||
971427f3 AZ |
2095 | err = ovs_internal_dev_rtnl_link_register(); |
2096 | if (err) | |
2097 | goto error_action_fifos_exit; | |
2098 | ||
5b9e7e16 JP |
2099 | err = ovs_flow_init(); |
2100 | if (err) | |
2101 | goto error_unreg_rtnl_link; | |
2102 | ||
ccb1352e JG |
2103 | err = ovs_vport_init(); |
2104 | if (err) | |
2105 | goto error_flow_exit; | |
2106 | ||
46df7b81 | 2107 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2108 | if (err) |
2109 | goto error_vport_exit; | |
2110 | ||
46df7b81 PS |
2111 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2112 | if (err) | |
2113 | goto error_netns_exit; | |
2114 | ||
ccb1352e JG |
2115 | err = dp_register_genl(); |
2116 | if (err < 0) | |
2117 | goto error_unreg_notifier; | |
2118 | ||
ccb1352e JG |
2119 | return 0; |
2120 | ||
2121 | error_unreg_notifier: | |
2122 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2123 | error_netns_exit: |
2124 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2125 | error_vport_exit: |
2126 | ovs_vport_exit(); | |
2127 | error_flow_exit: | |
2128 | ovs_flow_exit(); | |
5b9e7e16 JP |
2129 | error_unreg_rtnl_link: |
2130 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2131 | error_action_fifos_exit: |
2132 | action_fifos_exit(); | |
ccb1352e JG |
2133 | error: |
2134 | return err; | |
2135 | } | |
2136 | ||
2137 | static void dp_cleanup(void) | |
2138 | { | |
ccb1352e JG |
2139 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
2140 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2141 | unregister_pernet_device(&ovs_net_ops); |
2142 | rcu_barrier(); | |
ccb1352e JG |
2143 | ovs_vport_exit(); |
2144 | ovs_flow_exit(); | |
5b9e7e16 | 2145 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2146 | action_fifos_exit(); |
ccb1352e JG |
2147 | } |
2148 | ||
2149 | module_init(dp_init); | |
2150 | module_exit(dp_cleanup); | |
2151 | ||
2152 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2153 | MODULE_LICENSE("GPL"); |