Commit | Line | Data |
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ccb1352e | 1 | /* |
ad552007 | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
ccb1352e JG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
20 | ||
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/if_arp.h> | |
24 | #include <linux/if_vlan.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
27 | #include <linux/jhash.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
31 | #include <linux/genetlink.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/kthread.h> | |
34 | #include <linux/mutex.h> | |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
ccb1352e JG |
39 | #include <linux/ethtool.h> |
40 | #include <linux/wait.h> | |
ccb1352e JG |
41 | #include <asm/div64.h> |
42 | #include <linux/highmem.h> | |
43 | #include <linux/netfilter_bridge.h> | |
44 | #include <linux/netfilter_ipv4.h> | |
45 | #include <linux/inetdevice.h> | |
46 | #include <linux/list.h> | |
47 | #include <linux/openvswitch.h> | |
48 | #include <linux/rculist.h> | |
49 | #include <linux/dmi.h> | |
ccb1352e | 50 | #include <net/genetlink.h> |
46df7b81 PS |
51 | #include <net/net_namespace.h> |
52 | #include <net/netns/generic.h> | |
ccb1352e JG |
53 | |
54 | #include "datapath.h" | |
55 | #include "flow.h" | |
e80857cc | 56 | #include "flow_table.h" |
e6445719 | 57 | #include "flow_netlink.h" |
ccb1352e | 58 | #include "vport-internal_dev.h" |
cff63a52 | 59 | #include "vport-netdev.h" |
ccb1352e | 60 | |
8e4e1713 | 61 | int ovs_net_id __read_mostly; |
62b9c8d0 | 62 | EXPORT_SYMBOL(ovs_net_id); |
8e4e1713 | 63 | |
0c200ef9 PS |
64 | static struct genl_family dp_packet_genl_family; |
65 | static struct genl_family dp_flow_genl_family; | |
66 | static struct genl_family dp_datapath_genl_family; | |
67 | ||
48e48a70 | 68 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
69 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
70 | }; |
71 | ||
48e48a70 | 72 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
73 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
74 | }; |
75 | ||
48e48a70 | 76 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
77 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
78 | }; |
79 | ||
fb5d1e9e JR |
80 | /* Check if need to build a reply message. |
81 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
82 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
83 | unsigned int group) | |
fb5d1e9e JR |
84 | { |
85 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
9b67aa4a SG |
86 | genl_has_listeners(family, genl_info_net(info)->genl_sock, |
87 | group); | |
fb5d1e9e JR |
88 | } |
89 | ||
68eb5503 | 90 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 91 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 92 | { |
68eb5503 | 93 | genl_notify(family, skb, genl_info_net(info), info->snd_portid, |
2a94fe48 | 94 | 0, info->nlhdr, GFP_KERNEL); |
ed661185 TG |
95 | } |
96 | ||
ccb1352e JG |
97 | /** |
98 | * DOC: Locking: | |
99 | * | |
8e4e1713 PS |
100 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
101 | * operations on vports, etc.), Writes to other state (flow table | |
102 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
103 | * by ovs_lock. | |
ccb1352e JG |
104 | * |
105 | * Reads are protected by RCU. | |
106 | * | |
107 | * There are a few special cases (mostly stats) that have their own | |
108 | * synchronization but they nest under all of above and don't interact with | |
109 | * each other. | |
8e4e1713 PS |
110 | * |
111 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
112 | */ |
113 | ||
8e4e1713 PS |
114 | static DEFINE_MUTEX(ovs_mutex); |
115 | ||
116 | void ovs_lock(void) | |
117 | { | |
118 | mutex_lock(&ovs_mutex); | |
119 | } | |
120 | ||
121 | void ovs_unlock(void) | |
122 | { | |
123 | mutex_unlock(&ovs_mutex); | |
124 | } | |
125 | ||
126 | #ifdef CONFIG_LOCKDEP | |
127 | int lockdep_ovsl_is_held(void) | |
128 | { | |
129 | if (debug_locks) | |
130 | return lockdep_is_held(&ovs_mutex); | |
131 | else | |
132 | return 1; | |
133 | } | |
2c6c49de | 134 | EXPORT_SYMBOL(lockdep_ovsl_is_held); |
8e4e1713 PS |
135 | #endif |
136 | ||
ccb1352e | 137 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 138 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
ccb1352e | 139 | const struct dp_upcall_info *); |
8055a89c | 140 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
ccb1352e JG |
141 | const struct dp_upcall_info *); |
142 | ||
8e4e1713 | 143 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 144 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
ccb1352e JG |
145 | { |
146 | struct datapath *dp = NULL; | |
147 | struct net_device *dev; | |
148 | ||
149 | rcu_read_lock(); | |
46df7b81 | 150 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
ccb1352e JG |
151 | if (dev) { |
152 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
153 | if (vport) | |
154 | dp = vport->dp; | |
155 | } | |
156 | rcu_read_unlock(); | |
157 | ||
158 | return dp; | |
159 | } | |
160 | ||
8e4e1713 | 161 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 162 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 163 | { |
8e4e1713 | 164 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
ccb1352e JG |
165 | return vport->ops->get_name(vport); |
166 | } | |
167 | ||
168 | static int get_dpifindex(struct datapath *dp) | |
169 | { | |
170 | struct vport *local; | |
171 | int ifindex; | |
172 | ||
173 | rcu_read_lock(); | |
174 | ||
15eac2a7 | 175 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 176 | if (local) |
cff63a52 | 177 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
ccb1352e JG |
178 | else |
179 | ifindex = 0; | |
180 | ||
181 | rcu_read_unlock(); | |
182 | ||
183 | return ifindex; | |
184 | } | |
185 | ||
186 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
187 | { | |
188 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
189 | ||
9b996e54 | 190 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 191 | free_percpu(dp->stats_percpu); |
46df7b81 | 192 | release_net(ovs_dp_get_net(dp)); |
15eac2a7 | 193 | kfree(dp->ports); |
ccb1352e JG |
194 | kfree(dp); |
195 | } | |
196 | ||
15eac2a7 PS |
197 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
198 | u16 port_no) | |
199 | { | |
200 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
201 | } | |
202 | ||
bb6f9a70 | 203 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
204 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
205 | { | |
206 | struct vport *vport; | |
15eac2a7 PS |
207 | struct hlist_head *head; |
208 | ||
209 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 210 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
211 | if (vport->port_no == port_no) |
212 | return vport; | |
213 | } | |
214 | return NULL; | |
215 | } | |
216 | ||
8e4e1713 | 217 | /* Called with ovs_mutex. */ |
ccb1352e JG |
218 | static struct vport *new_vport(const struct vport_parms *parms) |
219 | { | |
220 | struct vport *vport; | |
221 | ||
222 | vport = ovs_vport_add(parms); | |
223 | if (!IS_ERR(vport)) { | |
224 | struct datapath *dp = parms->dp; | |
15eac2a7 | 225 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 226 | |
15eac2a7 | 227 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 228 | } |
ccb1352e JG |
229 | return vport; |
230 | } | |
231 | ||
ccb1352e JG |
232 | void ovs_dp_detach_port(struct vport *p) |
233 | { | |
8e4e1713 | 234 | ASSERT_OVSL(); |
ccb1352e JG |
235 | |
236 | /* First drop references to device. */ | |
15eac2a7 | 237 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
238 | |
239 | /* Then destroy it. */ | |
240 | ovs_vport_del(p); | |
241 | } | |
242 | ||
243 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 244 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 245 | { |
83c8df26 | 246 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
247 | struct datapath *dp = p->dp; |
248 | struct sw_flow *flow; | |
249 | struct dp_stats_percpu *stats; | |
ccb1352e | 250 | u64 *stats_counter; |
1bd7116f | 251 | u32 n_mask_hit; |
ccb1352e | 252 | |
404f2f10 | 253 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 254 | |
ccb1352e | 255 | /* Look up flow. */ |
8c8b1b83 | 256 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit); |
ccb1352e JG |
257 | if (unlikely(!flow)) { |
258 | struct dp_upcall_info upcall; | |
8c8b1b83 | 259 | int error; |
ccb1352e JG |
260 | |
261 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
8c8b1b83 | 262 | upcall.key = key; |
ccb1352e | 263 | upcall.userdata = NULL; |
5cd667b0 | 264 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
c5eba0b6 LR |
265 | error = ovs_dp_upcall(dp, skb, &upcall); |
266 | if (unlikely(error)) | |
267 | kfree_skb(skb); | |
268 | else | |
269 | consume_skb(skb); | |
ccb1352e JG |
270 | stats_counter = &stats->n_missed; |
271 | goto out; | |
272 | } | |
273 | ||
274 | OVS_CB(skb)->flow = flow; | |
275 | ||
8c8b1b83 PS |
276 | ovs_flow_stats_update(OVS_CB(skb)->flow, key->tp.flags, skb); |
277 | ovs_execute_actions(dp, skb, key); | |
e298e505 | 278 | stats_counter = &stats->n_hit; |
ccb1352e JG |
279 | |
280 | out: | |
281 | /* Update datapath statistics. */ | |
df9d9fdf | 282 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 283 | (*stats_counter)++; |
1bd7116f | 284 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 285 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
286 | } |
287 | ||
ccb1352e | 288 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
46df7b81 | 289 | const struct dp_upcall_info *upcall_info) |
ccb1352e JG |
290 | { |
291 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
292 | int err; |
293 | ||
15e47304 | 294 | if (upcall_info->portid == 0) { |
ccb1352e JG |
295 | err = -ENOTCONN; |
296 | goto err; | |
297 | } | |
298 | ||
ccb1352e | 299 | if (!skb_is_gso(skb)) |
8055a89c | 300 | err = queue_userspace_packet(dp, skb, upcall_info); |
ccb1352e | 301 | else |
8055a89c | 302 | err = queue_gso_packets(dp, skb, upcall_info); |
ccb1352e JG |
303 | if (err) |
304 | goto err; | |
305 | ||
306 | return 0; | |
307 | ||
308 | err: | |
404f2f10 | 309 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 310 | |
df9d9fdf | 311 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 312 | stats->n_lost++; |
df9d9fdf | 313 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
314 | |
315 | return err; | |
316 | } | |
317 | ||
8055a89c | 318 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
ccb1352e JG |
319 | const struct dp_upcall_info *upcall_info) |
320 | { | |
a1b5d0dd | 321 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
ccb1352e JG |
322 | struct dp_upcall_info later_info; |
323 | struct sw_flow_key later_key; | |
324 | struct sk_buff *segs, *nskb; | |
325 | int err; | |
326 | ||
09c5e605 | 327 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
328 | if (IS_ERR(segs)) |
329 | return PTR_ERR(segs); | |
330966e5 FW |
330 | if (segs == NULL) |
331 | return -EINVAL; | |
ccb1352e JG |
332 | |
333 | /* Queue all of the segments. */ | |
334 | skb = segs; | |
335 | do { | |
8055a89c | 336 | err = queue_userspace_packet(dp, skb, upcall_info); |
ccb1352e JG |
337 | if (err) |
338 | break; | |
339 | ||
a1b5d0dd | 340 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
ccb1352e JG |
341 | /* The initial flow key extracted by ovs_flow_extract() |
342 | * in this case is for a first fragment, so we need to | |
343 | * properly mark later fragments. | |
344 | */ | |
345 | later_key = *upcall_info->key; | |
346 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
347 | ||
348 | later_info = *upcall_info; | |
349 | later_info.key = &later_key; | |
350 | upcall_info = &later_info; | |
351 | } | |
352 | } while ((skb = skb->next)); | |
353 | ||
354 | /* Free all of the segments. */ | |
355 | skb = segs; | |
356 | do { | |
357 | nskb = skb->next; | |
358 | if (err) | |
359 | kfree_skb(skb); | |
360 | else | |
361 | consume_skb(skb); | |
362 | } while ((skb = nskb)); | |
363 | return err; | |
364 | } | |
365 | ||
c3ff8cfe TG |
366 | static size_t key_attr_size(void) |
367 | { | |
368 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
7d5437c7 PS |
369 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ |
370 | + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
371 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
372 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
373 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
374 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
375 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
376 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
67fa0341 | 377 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */ |
f5796684 | 378 | + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */ |
c3ff8cfe TG |
379 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ |
380 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
381 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
382 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
383 | + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */ | |
384 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
385 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
386 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
387 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
388 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
389 | } | |
390 | ||
bda56f14 TG |
391 | static size_t upcall_msg_size(const struct nlattr *userdata, |
392 | unsigned int hdrlen) | |
c3ff8cfe TG |
393 | { |
394 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 395 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
c3ff8cfe TG |
396 | + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
397 | ||
398 | /* OVS_PACKET_ATTR_USERDATA */ | |
399 | if (userdata) | |
400 | size += NLA_ALIGN(userdata->nla_len); | |
401 | ||
402 | return size; | |
403 | } | |
404 | ||
8055a89c | 405 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
ccb1352e JG |
406 | const struct dp_upcall_info *upcall_info) |
407 | { | |
408 | struct ovs_header *upcall; | |
409 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 410 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 411 | struct nlattr *nla; |
795449d8 | 412 | struct genl_info info = { |
8055a89c | 413 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
795449d8 TG |
414 | .snd_portid = upcall_info->portid, |
415 | }; | |
416 | size_t len; | |
bda56f14 | 417 | unsigned int hlen; |
8055a89c TG |
418 | int err, dp_ifindex; |
419 | ||
420 | dp_ifindex = get_dpifindex(dp); | |
421 | if (!dp_ifindex) | |
422 | return -ENODEV; | |
ccb1352e JG |
423 | |
424 | if (vlan_tx_tag_present(skb)) { | |
425 | nskb = skb_clone(skb, GFP_ATOMIC); | |
426 | if (!nskb) | |
427 | return -ENOMEM; | |
428 | ||
86a9bad3 | 429 | nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb)); |
8aa51d64 | 430 | if (!nskb) |
ccb1352e JG |
431 | return -ENOMEM; |
432 | ||
433 | nskb->vlan_tci = 0; | |
434 | skb = nskb; | |
435 | } | |
436 | ||
437 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
438 | err = -EFBIG; | |
439 | goto out; | |
440 | } | |
441 | ||
bda56f14 TG |
442 | /* Complete checksum if needed */ |
443 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
444 | (err = skb_checksum_help(skb))) | |
445 | goto out; | |
446 | ||
447 | /* Older versions of OVS user space enforce alignment of the last | |
448 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
449 | * padding logic. Only perform zerocopy if padding is not required. | |
450 | */ | |
451 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
452 | hlen = skb_zerocopy_headlen(skb); | |
453 | else | |
454 | hlen = skb->len; | |
455 | ||
456 | len = upcall_msg_size(upcall_info->userdata, hlen); | |
795449d8 | 457 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
ccb1352e JG |
458 | if (!user_skb) { |
459 | err = -ENOMEM; | |
460 | goto out; | |
461 | } | |
462 | ||
463 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
464 | 0, upcall_info->cmd); | |
465 | upcall->dp_ifindex = dp_ifindex; | |
466 | ||
467 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
f53e3831 AZ |
468 | err = ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb); |
469 | BUG_ON(err); | |
ccb1352e JG |
470 | nla_nest_end(user_skb, nla); |
471 | ||
472 | if (upcall_info->userdata) | |
4490108b BP |
473 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
474 | nla_len(upcall_info->userdata), | |
475 | nla_data(upcall_info->userdata)); | |
ccb1352e | 476 | |
bda56f14 TG |
477 | /* Only reserve room for attribute header, packet data is added |
478 | * in skb_zerocopy() */ | |
479 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
480 | err = -ENOBUFS; | |
481 | goto out; | |
482 | } | |
483 | nla->nla_len = nla_attr_size(skb->len); | |
ccb1352e | 484 | |
36d5fe6a ZK |
485 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
486 | if (err) | |
487 | goto out; | |
ccb1352e | 488 | |
aea0bb4f TG |
489 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
490 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
491 | size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len; | |
492 | ||
493 | if (plen > 0) | |
494 | memset(skb_put(user_skb, plen), 0, plen); | |
495 | } | |
496 | ||
bda56f14 | 497 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 498 | |
bda56f14 | 499 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 500 | user_skb = NULL; |
ccb1352e | 501 | out: |
36d5fe6a ZK |
502 | if (err) |
503 | skb_tx_error(skb); | |
4ee45ea0 | 504 | kfree_skb(user_skb); |
ccb1352e JG |
505 | kfree_skb(nskb); |
506 | return err; | |
507 | } | |
508 | ||
ccb1352e JG |
509 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
510 | { | |
511 | struct ovs_header *ovs_header = info->userhdr; | |
512 | struct nlattr **a = info->attrs; | |
513 | struct sw_flow_actions *acts; | |
514 | struct sk_buff *packet; | |
515 | struct sw_flow *flow; | |
516 | struct datapath *dp; | |
517 | struct ethhdr *eth; | |
83c8df26 | 518 | struct vport *input_vport; |
ccb1352e JG |
519 | int len; |
520 | int err; | |
ccb1352e JG |
521 | |
522 | err = -EINVAL; | |
523 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 524 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
525 | goto err; |
526 | ||
527 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
528 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
529 | err = -ENOMEM; | |
530 | if (!packet) | |
531 | goto err; | |
532 | skb_reserve(packet, NET_IP_ALIGN); | |
533 | ||
32686a9d | 534 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e JG |
535 | |
536 | skb_reset_mac_header(packet); | |
537 | eth = eth_hdr(packet); | |
538 | ||
539 | /* Normally, setting the skb 'protocol' field would be handled by a | |
540 | * call to eth_type_trans(), but it assumes there's a sending | |
541 | * device, which we may not have. */ | |
e5c5d22e | 542 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
543 | packet->protocol = eth->h_proto; |
544 | else | |
545 | packet->protocol = htons(ETH_P_802_2); | |
546 | ||
547 | /* Build an sw_flow for sending this packet. */ | |
23dabf88 | 548 | flow = ovs_flow_alloc(); |
ccb1352e JG |
549 | err = PTR_ERR(flow); |
550 | if (IS_ERR(flow)) | |
551 | goto err_kfree_skb; | |
552 | ||
83c8df26 PS |
553 | err = ovs_flow_key_extract_userspace(a[OVS_PACKET_ATTR_KEY], packet, |
554 | &flow->key); | |
ccb1352e JG |
555 | if (err) |
556 | goto err_flow_free; | |
557 | ||
e6445719 | 558 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
ccb1352e JG |
559 | err = PTR_ERR(acts); |
560 | if (IS_ERR(acts)) | |
561 | goto err_flow_free; | |
74f84a57 | 562 | |
e6445719 | 563 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
25cd9ba0 | 564 | &flow->key, &acts); |
74f84a57 PS |
565 | if (err) |
566 | goto err_flow_free; | |
ccb1352e | 567 | |
f5796684 JG |
568 | rcu_assign_pointer(flow->sf_acts, acts); |
569 | ||
570 | OVS_CB(packet)->egress_tun_info = NULL; | |
ccb1352e JG |
571 | OVS_CB(packet)->flow = flow; |
572 | packet->priority = flow->key.phy.priority; | |
39c7caeb | 573 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
574 | |
575 | rcu_read_lock(); | |
46df7b81 | 576 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
577 | err = -ENODEV; |
578 | if (!dp) | |
579 | goto err_unlock; | |
580 | ||
83c8df26 PS |
581 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
582 | if (!input_vport) | |
583 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
584 | ||
585 | if (!input_vport) | |
586 | goto err_unlock; | |
587 | ||
588 | OVS_CB(packet)->input_vport = input_vport; | |
589 | ||
ccb1352e | 590 | local_bh_disable(); |
2ff3e4e4 | 591 | err = ovs_execute_actions(dp, packet, &flow->key); |
ccb1352e JG |
592 | local_bh_enable(); |
593 | rcu_read_unlock(); | |
594 | ||
03f0d916 | 595 | ovs_flow_free(flow, false); |
ccb1352e JG |
596 | return err; |
597 | ||
598 | err_unlock: | |
599 | rcu_read_unlock(); | |
600 | err_flow_free: | |
03f0d916 | 601 | ovs_flow_free(flow, false); |
ccb1352e JG |
602 | err_kfree_skb: |
603 | kfree_skb(packet); | |
604 | err: | |
605 | return err; | |
606 | } | |
607 | ||
608 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 609 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
610 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
611 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
612 | }; | |
613 | ||
4534de83 | 614 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e JG |
615 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
616 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
617 | .policy = packet_policy, | |
618 | .doit = ovs_packet_cmd_execute | |
619 | } | |
620 | }; | |
621 | ||
0c200ef9 PS |
622 | static struct genl_family dp_packet_genl_family = { |
623 | .id = GENL_ID_GENERATE, | |
624 | .hdrsize = sizeof(struct ovs_header), | |
625 | .name = OVS_PACKET_FAMILY, | |
626 | .version = OVS_PACKET_VERSION, | |
627 | .maxattr = OVS_PACKET_ATTR_MAX, | |
628 | .netnsok = true, | |
629 | .parallel_ops = true, | |
630 | .ops = dp_packet_genl_ops, | |
631 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
632 | }; | |
633 | ||
1bd7116f AZ |
634 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats, |
635 | struct ovs_dp_megaflow_stats *mega_stats) | |
ccb1352e JG |
636 | { |
637 | int i; | |
ccb1352e | 638 | |
1bd7116f AZ |
639 | memset(mega_stats, 0, sizeof(*mega_stats)); |
640 | ||
b637e498 | 641 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 642 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
643 | |
644 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 645 | |
ccb1352e JG |
646 | for_each_possible_cpu(i) { |
647 | const struct dp_stats_percpu *percpu_stats; | |
648 | struct dp_stats_percpu local_stats; | |
649 | unsigned int start; | |
650 | ||
651 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
652 | ||
653 | do { | |
57a7744e | 654 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 655 | local_stats = *percpu_stats; |
57a7744e | 656 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
657 | |
658 | stats->n_hit += local_stats.n_hit; | |
659 | stats->n_missed += local_stats.n_missed; | |
660 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 661 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
662 | } |
663 | } | |
664 | ||
c3ff8cfe TG |
665 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
666 | { | |
667 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
668 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
03f0d916 | 669 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */ |
c3ff8cfe TG |
670 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
671 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
672 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
673 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
674 | } | |
675 | ||
bb6f9a70 | 676 | /* Called with ovs_mutex or RCU read lock. */ |
0e9796b4 | 677 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
15e47304 | 678 | struct sk_buff *skb, u32 portid, |
ccb1352e JG |
679 | u32 seq, u32 flags, u8 cmd) |
680 | { | |
681 | const int skb_orig_len = skb->len; | |
74f84a57 | 682 | struct nlattr *start; |
ccb1352e | 683 | struct ovs_flow_stats stats; |
e298e505 PS |
684 | __be16 tcp_flags; |
685 | unsigned long used; | |
ccb1352e JG |
686 | struct ovs_header *ovs_header; |
687 | struct nlattr *nla; | |
ccb1352e JG |
688 | int err; |
689 | ||
15e47304 | 690 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
ccb1352e JG |
691 | if (!ovs_header) |
692 | return -EMSGSIZE; | |
693 | ||
0e9796b4 | 694 | ovs_header->dp_ifindex = dp_ifindex; |
ccb1352e | 695 | |
03f0d916 | 696 | /* Fill flow key. */ |
ccb1352e JG |
697 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
698 | if (!nla) | |
699 | goto nla_put_failure; | |
03f0d916 | 700 | |
e6445719 | 701 | err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb); |
03f0d916 AZ |
702 | if (err) |
703 | goto error; | |
704 | nla_nest_end(skb, nla); | |
705 | ||
706 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); | |
707 | if (!nla) | |
708 | goto nla_put_failure; | |
709 | ||
e6445719 | 710 | err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb); |
ccb1352e JG |
711 | if (err) |
712 | goto error; | |
03f0d916 | 713 | |
ccb1352e JG |
714 | nla_nest_end(skb, nla); |
715 | ||
e298e505 | 716 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 717 | |
028d6a67 DM |
718 | if (used && |
719 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
720 | goto nla_put_failure; | |
ccb1352e | 721 | |
028d6a67 | 722 | if (stats.n_packets && |
e298e505 | 723 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) |
028d6a67 | 724 | goto nla_put_failure; |
ccb1352e | 725 | |
e298e505 PS |
726 | if ((u8)ntohs(tcp_flags) && |
727 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
028d6a67 | 728 | goto nla_put_failure; |
ccb1352e JG |
729 | |
730 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
731 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
732 | * Netlink but individual action lists can be longer than | |
733 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
734 | * The userspace caller can always fetch the actions separately if it | |
735 | * really wants them. (Most userspace callers in fact don't care.) | |
736 | * | |
737 | * This can only fail for dump operations because the skb is always | |
738 | * properly sized for single flows. | |
739 | */ | |
74f84a57 PS |
740 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
741 | if (start) { | |
d57170b1 PS |
742 | const struct sw_flow_actions *sf_acts; |
743 | ||
663efa36 | 744 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
745 | err = ovs_nla_put_actions(sf_acts->actions, |
746 | sf_acts->actions_len, skb); | |
0e9796b4 | 747 | |
74f84a57 PS |
748 | if (!err) |
749 | nla_nest_end(skb, start); | |
750 | else { | |
751 | if (skb_orig_len) | |
752 | goto error; | |
753 | ||
754 | nla_nest_cancel(skb, start); | |
755 | } | |
756 | } else if (skb_orig_len) | |
757 | goto nla_put_failure; | |
ccb1352e JG |
758 | |
759 | return genlmsg_end(skb, ovs_header); | |
760 | ||
761 | nla_put_failure: | |
762 | err = -EMSGSIZE; | |
763 | error: | |
764 | genlmsg_cancel(skb, ovs_header); | |
765 | return err; | |
766 | } | |
767 | ||
0e9796b4 JR |
768 | /* May not be called with RCU read lock. */ |
769 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
fb5d1e9e JR |
770 | struct genl_info *info, |
771 | bool always) | |
ccb1352e | 772 | { |
fb5d1e9e | 773 | struct sk_buff *skb; |
ccb1352e | 774 | |
9b67aa4a | 775 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
776 | return NULL; |
777 | ||
0e9796b4 | 778 | skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL); |
fb5d1e9e JR |
779 | if (!skb) |
780 | return ERR_PTR(-ENOMEM); | |
781 | ||
782 | return skb; | |
ccb1352e JG |
783 | } |
784 | ||
0e9796b4 JR |
785 | /* Called with ovs_mutex. */ |
786 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
787 | int dp_ifindex, | |
788 | struct genl_info *info, u8 cmd, | |
789 | bool always) | |
ccb1352e JG |
790 | { |
791 | struct sk_buff *skb; | |
792 | int retval; | |
793 | ||
0e9796b4 JR |
794 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info, |
795 | always); | |
d0e992aa | 796 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 797 | return skb; |
ccb1352e | 798 | |
0e9796b4 JR |
799 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
800 | info->snd_portid, info->snd_seq, 0, | |
801 | cmd); | |
ccb1352e JG |
802 | BUG_ON(retval < 0); |
803 | return skb; | |
804 | } | |
805 | ||
37bdc87b | 806 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e JG |
807 | { |
808 | struct nlattr **a = info->attrs; | |
809 | struct ovs_header *ovs_header = info->userhdr; | |
893f139b | 810 | struct sw_flow *flow, *new_flow; |
03f0d916 | 811 | struct sw_flow_mask mask; |
ccb1352e JG |
812 | struct sk_buff *reply; |
813 | struct datapath *dp; | |
37bdc87b | 814 | struct sw_flow_actions *acts; |
03f0d916 | 815 | struct sw_flow_match match; |
ccb1352e | 816 | int error; |
ccb1352e | 817 | |
893f139b | 818 | /* Must have key and actions. */ |
ccb1352e | 819 | error = -EINVAL; |
426cda5c JG |
820 | if (!a[OVS_FLOW_ATTR_KEY]) { |
821 | OVS_NLERR("Flow key attribute not present in new flow.\n"); | |
ccb1352e | 822 | goto error; |
426cda5c JG |
823 | } |
824 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
825 | OVS_NLERR("Flow actions attribute not present in new flow.\n"); | |
893f139b | 826 | goto error; |
426cda5c | 827 | } |
03f0d916 | 828 | |
893f139b JR |
829 | /* Most of the time we need to allocate a new flow, do it before |
830 | * locking. | |
831 | */ | |
832 | new_flow = ovs_flow_alloc(); | |
833 | if (IS_ERR(new_flow)) { | |
834 | error = PTR_ERR(new_flow); | |
835 | goto error; | |
836 | } | |
837 | ||
838 | /* Extract key. */ | |
839 | ovs_match_init(&match, &new_flow->unmasked_key, &mask); | |
23dabf88 | 840 | error = ovs_nla_get_match(&match, |
e6445719 | 841 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); |
ccb1352e | 842 | if (error) |
893f139b | 843 | goto err_kfree_flow; |
ccb1352e | 844 | |
893f139b | 845 | ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask); |
74f84a57 | 846 | |
893f139b | 847 | /* Validate actions. */ |
37bdc87b JR |
848 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
849 | error = PTR_ERR(acts); | |
850 | if (IS_ERR(acts)) | |
893f139b | 851 | goto err_kfree_flow; |
37bdc87b | 852 | |
893f139b | 853 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key, |
25cd9ba0 | 854 | &acts); |
37bdc87b JR |
855 | if (error) { |
856 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
893f139b JR |
857 | goto err_kfree_acts; |
858 | } | |
859 | ||
860 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
861 | if (IS_ERR(reply)) { | |
862 | error = PTR_ERR(reply); | |
863 | goto err_kfree_acts; | |
ccb1352e JG |
864 | } |
865 | ||
8e4e1713 | 866 | ovs_lock(); |
46df7b81 | 867 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
893f139b JR |
868 | if (unlikely(!dp)) { |
869 | error = -ENODEV; | |
8e4e1713 | 870 | goto err_unlock_ovs; |
893f139b | 871 | } |
03f0d916 | 872 | /* Check if this is a duplicate flow */ |
893f139b JR |
873 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key); |
874 | if (likely(!flow)) { | |
875 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
876 | |
877 | /* Put flow in bucket. */ | |
893f139b JR |
878 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
879 | if (unlikely(error)) { | |
618ed0c8 | 880 | acts = NULL; |
893f139b JR |
881 | goto err_unlock_ovs; |
882 | } | |
883 | ||
884 | if (unlikely(reply)) { | |
885 | error = ovs_flow_cmd_fill_info(new_flow, | |
886 | ovs_header->dp_ifindex, | |
887 | reply, info->snd_portid, | |
888 | info->snd_seq, 0, | |
889 | OVS_FLOW_CMD_NEW); | |
890 | BUG_ON(error < 0); | |
618ed0c8 | 891 | } |
893f139b | 892 | ovs_unlock(); |
ccb1352e | 893 | } else { |
37bdc87b JR |
894 | struct sw_flow_actions *old_acts; |
895 | ||
ccb1352e JG |
896 | /* Bail out if we're not allowed to modify an existing flow. |
897 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
898 | * because Generic Netlink treats the latter as a dump | |
899 | * request. We also accept NLM_F_EXCL in case that bug ever | |
900 | * gets fixed. | |
901 | */ | |
893f139b JR |
902 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
903 | | NLM_F_EXCL))) { | |
904 | error = -EEXIST; | |
8e4e1713 | 905 | goto err_unlock_ovs; |
893f139b | 906 | } |
03f0d916 | 907 | /* The unmasked key has to be the same for flow updates. */ |
893f139b | 908 | if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) { |
4a46b24e AW |
909 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
910 | if (!flow) { | |
911 | error = -ENOENT; | |
912 | goto err_unlock_ovs; | |
913 | } | |
893f139b | 914 | } |
37bdc87b JR |
915 | /* Update actions. */ |
916 | old_acts = ovsl_dereference(flow->sf_acts); | |
917 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 918 | |
893f139b JR |
919 | if (unlikely(reply)) { |
920 | error = ovs_flow_cmd_fill_info(flow, | |
921 | ovs_header->dp_ifindex, | |
922 | reply, info->snd_portid, | |
923 | info->snd_seq, 0, | |
924 | OVS_FLOW_CMD_NEW); | |
925 | BUG_ON(error < 0); | |
926 | } | |
927 | ovs_unlock(); | |
37bdc87b | 928 | |
893f139b JR |
929 | ovs_nla_free_flow_actions(old_acts); |
930 | ovs_flow_free(new_flow, false); | |
37bdc87b | 931 | } |
893f139b JR |
932 | |
933 | if (reply) | |
934 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
935 | return 0; |
936 | ||
37bdc87b JR |
937 | err_unlock_ovs: |
938 | ovs_unlock(); | |
893f139b JR |
939 | kfree_skb(reply); |
940 | err_kfree_acts: | |
37bdc87b | 941 | kfree(acts); |
893f139b JR |
942 | err_kfree_flow: |
943 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
944 | error: |
945 | return error; | |
946 | } | |
ccb1352e | 947 | |
6b205b2c JG |
948 | static struct sw_flow_actions *get_flow_actions(const struct nlattr *a, |
949 | const struct sw_flow_key *key, | |
950 | const struct sw_flow_mask *mask) | |
951 | { | |
952 | struct sw_flow_actions *acts; | |
953 | struct sw_flow_key masked_key; | |
954 | int error; | |
955 | ||
956 | acts = ovs_nla_alloc_flow_actions(nla_len(a)); | |
957 | if (IS_ERR(acts)) | |
958 | return acts; | |
959 | ||
960 | ovs_flow_mask_key(&masked_key, key, mask); | |
25cd9ba0 | 961 | error = ovs_nla_copy_actions(a, &masked_key, &acts); |
6b205b2c JG |
962 | if (error) { |
963 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
964 | kfree(acts); | |
965 | return ERR_PTR(error); | |
966 | } | |
967 | ||
968 | return acts; | |
969 | } | |
970 | ||
37bdc87b JR |
971 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
972 | { | |
973 | struct nlattr **a = info->attrs; | |
974 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 975 | struct sw_flow_key key; |
37bdc87b JR |
976 | struct sw_flow *flow; |
977 | struct sw_flow_mask mask; | |
978 | struct sk_buff *reply = NULL; | |
979 | struct datapath *dp; | |
893f139b | 980 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b JR |
981 | struct sw_flow_match match; |
982 | int error; | |
983 | ||
984 | /* Extract key. */ | |
985 | error = -EINVAL; | |
426cda5c JG |
986 | if (!a[OVS_FLOW_ATTR_KEY]) { |
987 | OVS_NLERR("Flow key attribute not present in set flow.\n"); | |
37bdc87b | 988 | goto error; |
426cda5c | 989 | } |
37bdc87b JR |
990 | |
991 | ovs_match_init(&match, &key, &mask); | |
992 | error = ovs_nla_get_match(&match, | |
993 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); | |
994 | if (error) | |
995 | goto error; | |
996 | ||
997 | /* Validate actions. */ | |
998 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
6b205b2c JG |
999 | acts = get_flow_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, &mask); |
1000 | if (IS_ERR(acts)) { | |
1001 | error = PTR_ERR(acts); | |
37bdc87b | 1002 | goto error; |
893f139b JR |
1003 | } |
1004 | } | |
1005 | ||
1006 | /* Can allocate before locking if have acts. */ | |
1007 | if (acts) { | |
1008 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
1009 | if (IS_ERR(reply)) { | |
1010 | error = PTR_ERR(reply); | |
1011 | goto err_kfree_acts; | |
be52c9e9 | 1012 | } |
37bdc87b | 1013 | } |
0e9796b4 | 1014 | |
37bdc87b JR |
1015 | ovs_lock(); |
1016 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
893f139b JR |
1017 | if (unlikely(!dp)) { |
1018 | error = -ENODEV; | |
37bdc87b | 1019 | goto err_unlock_ovs; |
893f139b | 1020 | } |
37bdc87b | 1021 | /* Check that the flow exists. */ |
4a46b24e | 1022 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
893f139b JR |
1023 | if (unlikely(!flow)) { |
1024 | error = -ENOENT; | |
37bdc87b | 1025 | goto err_unlock_ovs; |
893f139b | 1026 | } |
4a46b24e | 1027 | |
37bdc87b | 1028 | /* Update actions, if present. */ |
893f139b | 1029 | if (likely(acts)) { |
37bdc87b JR |
1030 | old_acts = ovsl_dereference(flow->sf_acts); |
1031 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1032 | |
1033 | if (unlikely(reply)) { | |
1034 | error = ovs_flow_cmd_fill_info(flow, | |
1035 | ovs_header->dp_ifindex, | |
1036 | reply, info->snd_portid, | |
1037 | info->snd_seq, 0, | |
1038 | OVS_FLOW_CMD_NEW); | |
1039 | BUG_ON(error < 0); | |
1040 | } | |
1041 | } else { | |
1042 | /* Could not alloc without acts before locking. */ | |
1043 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
1044 | info, OVS_FLOW_CMD_NEW, false); | |
1045 | if (unlikely(IS_ERR(reply))) { | |
1046 | error = PTR_ERR(reply); | |
1047 | goto err_unlock_ovs; | |
1048 | } | |
ccb1352e | 1049 | } |
37bdc87b | 1050 | |
37bdc87b JR |
1051 | /* Clear stats. */ |
1052 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1053 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1054 | ovs_unlock(); |
ccb1352e | 1055 | |
893f139b JR |
1056 | if (reply) |
1057 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1058 | if (old_acts) | |
1059 | ovs_nla_free_flow_actions(old_acts); | |
fb5d1e9e | 1060 | |
ccb1352e JG |
1061 | return 0; |
1062 | ||
8e4e1713 PS |
1063 | err_unlock_ovs: |
1064 | ovs_unlock(); | |
893f139b JR |
1065 | kfree_skb(reply); |
1066 | err_kfree_acts: | |
74f84a57 | 1067 | kfree(acts); |
ccb1352e JG |
1068 | error: |
1069 | return error; | |
1070 | } | |
1071 | ||
1072 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1073 | { | |
1074 | struct nlattr **a = info->attrs; | |
1075 | struct ovs_header *ovs_header = info->userhdr; | |
1076 | struct sw_flow_key key; | |
1077 | struct sk_buff *reply; | |
1078 | struct sw_flow *flow; | |
1079 | struct datapath *dp; | |
03f0d916 | 1080 | struct sw_flow_match match; |
ccb1352e | 1081 | int err; |
ccb1352e | 1082 | |
03f0d916 AZ |
1083 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1084 | OVS_NLERR("Flow get message rejected, Key attribute missing.\n"); | |
ccb1352e | 1085 | return -EINVAL; |
03f0d916 AZ |
1086 | } |
1087 | ||
1088 | ovs_match_init(&match, &key, NULL); | |
23dabf88 | 1089 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL); |
ccb1352e JG |
1090 | if (err) |
1091 | return err; | |
1092 | ||
8e4e1713 | 1093 | ovs_lock(); |
46df7b81 | 1094 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1095 | if (!dp) { |
1096 | err = -ENODEV; | |
1097 | goto unlock; | |
1098 | } | |
ccb1352e | 1099 | |
4a46b24e AW |
1100 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1101 | if (!flow) { | |
8e4e1713 PS |
1102 | err = -ENOENT; |
1103 | goto unlock; | |
1104 | } | |
ccb1352e | 1105 | |
0e9796b4 JR |
1106 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
1107 | OVS_FLOW_CMD_NEW, true); | |
8e4e1713 PS |
1108 | if (IS_ERR(reply)) { |
1109 | err = PTR_ERR(reply); | |
1110 | goto unlock; | |
1111 | } | |
ccb1352e | 1112 | |
8e4e1713 | 1113 | ovs_unlock(); |
ccb1352e | 1114 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1115 | unlock: |
1116 | ovs_unlock(); | |
1117 | return err; | |
ccb1352e JG |
1118 | } |
1119 | ||
1120 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1121 | { | |
1122 | struct nlattr **a = info->attrs; | |
1123 | struct ovs_header *ovs_header = info->userhdr; | |
1124 | struct sw_flow_key key; | |
1125 | struct sk_buff *reply; | |
1126 | struct sw_flow *flow; | |
1127 | struct datapath *dp; | |
03f0d916 | 1128 | struct sw_flow_match match; |
ccb1352e | 1129 | int err; |
ccb1352e | 1130 | |
aed06778 JR |
1131 | if (likely(a[OVS_FLOW_ATTR_KEY])) { |
1132 | ovs_match_init(&match, &key, NULL); | |
1133 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL); | |
1134 | if (unlikely(err)) | |
1135 | return err; | |
1136 | } | |
1137 | ||
8e4e1713 | 1138 | ovs_lock(); |
46df7b81 | 1139 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1140 | if (unlikely(!dp)) { |
8e4e1713 PS |
1141 | err = -ENODEV; |
1142 | goto unlock; | |
1143 | } | |
46df7b81 | 1144 | |
aed06778 | 1145 | if (unlikely(!a[OVS_FLOW_ATTR_KEY])) { |
b637e498 | 1146 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1147 | goto unlock; |
1148 | } | |
03f0d916 | 1149 | |
4a46b24e AW |
1150 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1151 | if (unlikely(!flow)) { | |
8e4e1713 PS |
1152 | err = -ENOENT; |
1153 | goto unlock; | |
1154 | } | |
ccb1352e | 1155 | |
b637e498 | 1156 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1157 | ovs_unlock(); |
ccb1352e | 1158 | |
aed06778 JR |
1159 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
1160 | info, false); | |
1161 | if (likely(reply)) { | |
1162 | if (likely(!IS_ERR(reply))) { | |
1163 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1164 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1165 | reply, info->snd_portid, | |
1166 | info->snd_seq, 0, | |
1167 | OVS_FLOW_CMD_DEL); | |
1168 | rcu_read_unlock(); | |
1169 | BUG_ON(err < 0); | |
1170 | ||
1171 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1172 | } else { | |
1173 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1174 | } | |
fb5d1e9e | 1175 | } |
ccb1352e | 1176 | |
aed06778 | 1177 | ovs_flow_free(flow, true); |
ccb1352e | 1178 | return 0; |
8e4e1713 PS |
1179 | unlock: |
1180 | ovs_unlock(); | |
1181 | return err; | |
ccb1352e JG |
1182 | } |
1183 | ||
1184 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1185 | { | |
1186 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
b637e498 | 1187 | struct table_instance *ti; |
ccb1352e | 1188 | struct datapath *dp; |
ccb1352e | 1189 | |
d57170b1 | 1190 | rcu_read_lock(); |
46df7b81 | 1191 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1192 | if (!dp) { |
d57170b1 | 1193 | rcu_read_unlock(); |
ccb1352e | 1194 | return -ENODEV; |
8e4e1713 | 1195 | } |
ccb1352e | 1196 | |
b637e498 | 1197 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1198 | for (;;) { |
1199 | struct sw_flow *flow; | |
1200 | u32 bucket, obj; | |
1201 | ||
1202 | bucket = cb->args[0]; | |
1203 | obj = cb->args[1]; | |
b637e498 | 1204 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1205 | if (!flow) |
1206 | break; | |
1207 | ||
0e9796b4 | 1208 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1209 | NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1210 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1211 | OVS_FLOW_CMD_NEW) < 0) | |
1212 | break; | |
1213 | ||
1214 | cb->args[0] = bucket; | |
1215 | cb->args[1] = obj; | |
1216 | } | |
d57170b1 | 1217 | rcu_read_unlock(); |
ccb1352e JG |
1218 | return skb->len; |
1219 | } | |
1220 | ||
0c200ef9 PS |
1221 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1222 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
1223 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1224 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
1225 | }; | |
1226 | ||
48e48a70 | 1227 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e JG |
1228 | { .cmd = OVS_FLOW_CMD_NEW, |
1229 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1230 | .policy = flow_policy, | |
37bdc87b | 1231 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1232 | }, |
1233 | { .cmd = OVS_FLOW_CMD_DEL, | |
1234 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1235 | .policy = flow_policy, | |
1236 | .doit = ovs_flow_cmd_del | |
1237 | }, | |
1238 | { .cmd = OVS_FLOW_CMD_GET, | |
1239 | .flags = 0, /* OK for unprivileged users. */ | |
1240 | .policy = flow_policy, | |
1241 | .doit = ovs_flow_cmd_get, | |
1242 | .dumpit = ovs_flow_cmd_dump | |
1243 | }, | |
1244 | { .cmd = OVS_FLOW_CMD_SET, | |
1245 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1246 | .policy = flow_policy, | |
37bdc87b | 1247 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1248 | }, |
1249 | }; | |
1250 | ||
0c200ef9 | 1251 | static struct genl_family dp_flow_genl_family = { |
ccb1352e JG |
1252 | .id = GENL_ID_GENERATE, |
1253 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1254 | .name = OVS_FLOW_FAMILY, |
1255 | .version = OVS_FLOW_VERSION, | |
1256 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3a4e0d6a PS |
1257 | .netnsok = true, |
1258 | .parallel_ops = true, | |
0c200ef9 PS |
1259 | .ops = dp_flow_genl_ops, |
1260 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1261 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1262 | .n_mcgrps = 1, | |
ccb1352e JG |
1263 | }; |
1264 | ||
c3ff8cfe TG |
1265 | static size_t ovs_dp_cmd_msg_size(void) |
1266 | { | |
1267 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1268 | ||
1269 | msgsize += nla_total_size(IFNAMSIZ); | |
1270 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1bd7116f | 1271 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
45fb9c35 | 1272 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1273 | |
1274 | return msgsize; | |
1275 | } | |
1276 | ||
bb6f9a70 | 1277 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1278 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1279 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1280 | { |
1281 | struct ovs_header *ovs_header; | |
1282 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1283 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1284 | int err; |
1285 | ||
15e47304 | 1286 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1287 | flags, cmd); |
1288 | if (!ovs_header) | |
1289 | goto error; | |
1290 | ||
1291 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1292 | ||
ccb1352e | 1293 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1294 | if (err) |
1295 | goto nla_put_failure; | |
1296 | ||
1bd7116f AZ |
1297 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1298 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1299 | &dp_stats)) | |
1300 | goto nla_put_failure; | |
1301 | ||
1302 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1303 | sizeof(struct ovs_dp_megaflow_stats), | |
1304 | &dp_megaflow_stats)) | |
028d6a67 | 1305 | goto nla_put_failure; |
ccb1352e | 1306 | |
43d4be9c TG |
1307 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1308 | goto nla_put_failure; | |
1309 | ||
ccb1352e JG |
1310 | return genlmsg_end(skb, ovs_header); |
1311 | ||
1312 | nla_put_failure: | |
1313 | genlmsg_cancel(skb, ovs_header); | |
1314 | error: | |
1315 | return -EMSGSIZE; | |
1316 | } | |
1317 | ||
6093ae9a | 1318 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
ccb1352e | 1319 | { |
6093ae9a | 1320 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
ccb1352e JG |
1321 | } |
1322 | ||
bb6f9a70 | 1323 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 PS |
1324 | static struct datapath *lookup_datapath(struct net *net, |
1325 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1326 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1327 | { | |
1328 | struct datapath *dp; | |
1329 | ||
1330 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1331 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1332 | else { |
1333 | struct vport *vport; | |
1334 | ||
46df7b81 | 1335 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1336 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1337 | } |
1338 | return dp ? dp : ERR_PTR(-ENODEV); | |
1339 | } | |
1340 | ||
44da5ae5 TG |
1341 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1342 | { | |
1343 | struct datapath *dp; | |
1344 | ||
1345 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1346 | if (IS_ERR(dp)) |
44da5ae5 TG |
1347 | return; |
1348 | ||
1349 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1350 | dp->user_features = 0; | |
1351 | } | |
1352 | ||
43d4be9c TG |
1353 | static void ovs_dp_change(struct datapath *dp, struct nlattr **a) |
1354 | { | |
1355 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1356 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1357 | } | |
1358 | ||
ccb1352e JG |
1359 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1360 | { | |
1361 | struct nlattr **a = info->attrs; | |
1362 | struct vport_parms parms; | |
1363 | struct sk_buff *reply; | |
1364 | struct datapath *dp; | |
1365 | struct vport *vport; | |
46df7b81 | 1366 | struct ovs_net *ovs_net; |
15eac2a7 | 1367 | int err, i; |
ccb1352e JG |
1368 | |
1369 | err = -EINVAL; | |
1370 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1371 | goto err; | |
1372 | ||
6093ae9a JR |
1373 | reply = ovs_dp_cmd_alloc_info(info); |
1374 | if (!reply) | |
1375 | return -ENOMEM; | |
ccb1352e JG |
1376 | |
1377 | err = -ENOMEM; | |
1378 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1379 | if (dp == NULL) | |
6093ae9a | 1380 | goto err_free_reply; |
46df7b81 | 1381 | |
46df7b81 | 1382 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
ccb1352e JG |
1383 | |
1384 | /* Allocate table. */ | |
b637e498 PS |
1385 | err = ovs_flow_tbl_init(&dp->table); |
1386 | if (err) | |
ccb1352e JG |
1387 | goto err_free_dp; |
1388 | ||
1c213bd2 | 1389 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1390 | if (!dp->stats_percpu) { |
1391 | err = -ENOMEM; | |
1392 | goto err_destroy_table; | |
1393 | } | |
1394 | ||
15eac2a7 | 1395 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
e6445719 | 1396 | GFP_KERNEL); |
15eac2a7 PS |
1397 | if (!dp->ports) { |
1398 | err = -ENOMEM; | |
1399 | goto err_destroy_percpu; | |
1400 | } | |
1401 | ||
1402 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1403 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1404 | ||
ccb1352e JG |
1405 | /* Set up our datapath device. */ |
1406 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1407 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1408 | parms.options = NULL; | |
1409 | parms.dp = dp; | |
1410 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1411 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1412 | |
43d4be9c TG |
1413 | ovs_dp_change(dp, a); |
1414 | ||
6093ae9a JR |
1415 | /* So far only local changes have been made, now need the lock. */ |
1416 | ovs_lock(); | |
1417 | ||
ccb1352e JG |
1418 | vport = new_vport(&parms); |
1419 | if (IS_ERR(vport)) { | |
1420 | err = PTR_ERR(vport); | |
1421 | if (err == -EBUSY) | |
1422 | err = -EEXIST; | |
1423 | ||
44da5ae5 TG |
1424 | if (err == -EEXIST) { |
1425 | /* An outdated user space instance that does not understand | |
1426 | * the concept of user_features has attempted to create a new | |
1427 | * datapath and is likely to reuse it. Drop all user features. | |
1428 | */ | |
1429 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1430 | ovs_dp_reset_user_features(skb, info); | |
1431 | } | |
1432 | ||
15eac2a7 | 1433 | goto err_destroy_ports_array; |
ccb1352e JG |
1434 | } |
1435 | ||
6093ae9a JR |
1436 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1437 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1438 | BUG_ON(err < 0); | |
ccb1352e | 1439 | |
46df7b81 | 1440 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1441 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1442 | |
1443 | ovs_unlock(); | |
ccb1352e | 1444 | |
2a94fe48 | 1445 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1446 | return 0; |
1447 | ||
15eac2a7 | 1448 | err_destroy_ports_array: |
6093ae9a | 1449 | ovs_unlock(); |
15eac2a7 | 1450 | kfree(dp->ports); |
ccb1352e JG |
1451 | err_destroy_percpu: |
1452 | free_percpu(dp->stats_percpu); | |
1453 | err_destroy_table: | |
9b996e54 | 1454 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 1455 | err_free_dp: |
46df7b81 | 1456 | release_net(ovs_dp_get_net(dp)); |
ccb1352e | 1457 | kfree(dp); |
6093ae9a JR |
1458 | err_free_reply: |
1459 | kfree_skb(reply); | |
ccb1352e JG |
1460 | err: |
1461 | return err; | |
1462 | } | |
1463 | ||
8e4e1713 | 1464 | /* Called with ovs_mutex. */ |
46df7b81 | 1465 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1466 | { |
15eac2a7 | 1467 | int i; |
ccb1352e | 1468 | |
15eac2a7 PS |
1469 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1470 | struct vport *vport; | |
b67bfe0d | 1471 | struct hlist_node *n; |
15eac2a7 | 1472 | |
b67bfe0d | 1473 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1474 | if (vport->port_no != OVSP_LOCAL) |
1475 | ovs_dp_detach_port(vport); | |
1476 | } | |
ccb1352e | 1477 | |
59a35d60 | 1478 | list_del_rcu(&dp->list_node); |
ccb1352e | 1479 | |
8e4e1713 | 1480 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1481 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1482 | */ |
8e4e1713 | 1483 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1484 | |
e80857cc | 1485 | /* RCU destroy the flow table */ |
ccb1352e | 1486 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1487 | } |
1488 | ||
1489 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1490 | { | |
1491 | struct sk_buff *reply; | |
1492 | struct datapath *dp; | |
1493 | int err; | |
1494 | ||
6093ae9a JR |
1495 | reply = ovs_dp_cmd_alloc_info(info); |
1496 | if (!reply) | |
1497 | return -ENOMEM; | |
1498 | ||
8e4e1713 | 1499 | ovs_lock(); |
46df7b81 PS |
1500 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1501 | err = PTR_ERR(dp); | |
1502 | if (IS_ERR(dp)) | |
6093ae9a | 1503 | goto err_unlock_free; |
46df7b81 | 1504 | |
6093ae9a JR |
1505 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1506 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1507 | BUG_ON(err < 0); | |
46df7b81 PS |
1508 | |
1509 | __dp_destroy(dp); | |
8e4e1713 | 1510 | ovs_unlock(); |
ccb1352e | 1511 | |
2a94fe48 | 1512 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1513 | |
1514 | return 0; | |
6093ae9a JR |
1515 | |
1516 | err_unlock_free: | |
8e4e1713 | 1517 | ovs_unlock(); |
6093ae9a | 1518 | kfree_skb(reply); |
8e4e1713 | 1519 | return err; |
ccb1352e JG |
1520 | } |
1521 | ||
1522 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1523 | { | |
1524 | struct sk_buff *reply; | |
1525 | struct datapath *dp; | |
1526 | int err; | |
1527 | ||
6093ae9a JR |
1528 | reply = ovs_dp_cmd_alloc_info(info); |
1529 | if (!reply) | |
1530 | return -ENOMEM; | |
1531 | ||
8e4e1713 | 1532 | ovs_lock(); |
46df7b81 | 1533 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1534 | err = PTR_ERR(dp); |
ccb1352e | 1535 | if (IS_ERR(dp)) |
6093ae9a | 1536 | goto err_unlock_free; |
ccb1352e | 1537 | |
43d4be9c TG |
1538 | ovs_dp_change(dp, info->attrs); |
1539 | ||
6093ae9a JR |
1540 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1541 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1542 | BUG_ON(err < 0); | |
ccb1352e | 1543 | |
8e4e1713 | 1544 | ovs_unlock(); |
2a94fe48 | 1545 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1546 | |
1547 | return 0; | |
6093ae9a JR |
1548 | |
1549 | err_unlock_free: | |
8e4e1713 | 1550 | ovs_unlock(); |
6093ae9a | 1551 | kfree_skb(reply); |
8e4e1713 | 1552 | return err; |
ccb1352e JG |
1553 | } |
1554 | ||
1555 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1556 | { | |
1557 | struct sk_buff *reply; | |
1558 | struct datapath *dp; | |
8e4e1713 | 1559 | int err; |
ccb1352e | 1560 | |
6093ae9a JR |
1561 | reply = ovs_dp_cmd_alloc_info(info); |
1562 | if (!reply) | |
1563 | return -ENOMEM; | |
1564 | ||
1565 | rcu_read_lock(); | |
46df7b81 | 1566 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1567 | if (IS_ERR(dp)) { |
1568 | err = PTR_ERR(dp); | |
6093ae9a | 1569 | goto err_unlock_free; |
8e4e1713 | 1570 | } |
6093ae9a JR |
1571 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1572 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1573 | BUG_ON(err < 0); | |
1574 | rcu_read_unlock(); | |
ccb1352e JG |
1575 | |
1576 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1577 | |
6093ae9a JR |
1578 | err_unlock_free: |
1579 | rcu_read_unlock(); | |
1580 | kfree_skb(reply); | |
8e4e1713 | 1581 | return err; |
ccb1352e JG |
1582 | } |
1583 | ||
1584 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1585 | { | |
46df7b81 | 1586 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1587 | struct datapath *dp; |
1588 | int skip = cb->args[0]; | |
1589 | int i = 0; | |
1590 | ||
59a35d60 PS |
1591 | rcu_read_lock(); |
1592 | list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1593 | if (i >= skip && |
15e47304 | 1594 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1595 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1596 | OVS_DP_CMD_NEW) < 0) | |
1597 | break; | |
1598 | i++; | |
1599 | } | |
59a35d60 | 1600 | rcu_read_unlock(); |
ccb1352e JG |
1601 | |
1602 | cb->args[0] = i; | |
1603 | ||
1604 | return skb->len; | |
1605 | } | |
1606 | ||
0c200ef9 PS |
1607 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1608 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1609 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1610 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1611 | }; | |
1612 | ||
48e48a70 | 1613 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e JG |
1614 | { .cmd = OVS_DP_CMD_NEW, |
1615 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1616 | .policy = datapath_policy, | |
1617 | .doit = ovs_dp_cmd_new | |
1618 | }, | |
1619 | { .cmd = OVS_DP_CMD_DEL, | |
1620 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1621 | .policy = datapath_policy, | |
1622 | .doit = ovs_dp_cmd_del | |
1623 | }, | |
1624 | { .cmd = OVS_DP_CMD_GET, | |
1625 | .flags = 0, /* OK for unprivileged users. */ | |
1626 | .policy = datapath_policy, | |
1627 | .doit = ovs_dp_cmd_get, | |
1628 | .dumpit = ovs_dp_cmd_dump | |
1629 | }, | |
1630 | { .cmd = OVS_DP_CMD_SET, | |
1631 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1632 | .policy = datapath_policy, | |
1633 | .doit = ovs_dp_cmd_set, | |
1634 | }, | |
1635 | }; | |
1636 | ||
0c200ef9 | 1637 | static struct genl_family dp_datapath_genl_family = { |
ccb1352e JG |
1638 | .id = GENL_ID_GENERATE, |
1639 | .hdrsize = sizeof(struct ovs_header), | |
0c200ef9 PS |
1640 | .name = OVS_DATAPATH_FAMILY, |
1641 | .version = OVS_DATAPATH_VERSION, | |
1642 | .maxattr = OVS_DP_ATTR_MAX, | |
3a4e0d6a PS |
1643 | .netnsok = true, |
1644 | .parallel_ops = true, | |
0c200ef9 PS |
1645 | .ops = dp_datapath_genl_ops, |
1646 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1647 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1648 | .n_mcgrps = 1, | |
ccb1352e JG |
1649 | }; |
1650 | ||
8e4e1713 | 1651 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1652 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1653 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1654 | { |
1655 | struct ovs_header *ovs_header; | |
1656 | struct ovs_vport_stats vport_stats; | |
1657 | int err; | |
1658 | ||
15e47304 | 1659 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1660 | flags, cmd); |
1661 | if (!ovs_header) | |
1662 | return -EMSGSIZE; | |
1663 | ||
1664 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1665 | ||
028d6a67 DM |
1666 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1667 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 AW |
1668 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
1669 | vport->ops->get_name(vport))) | |
028d6a67 | 1670 | goto nla_put_failure; |
ccb1352e JG |
1671 | |
1672 | ovs_vport_get_stats(vport, &vport_stats); | |
028d6a67 DM |
1673 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1674 | &vport_stats)) | |
1675 | goto nla_put_failure; | |
ccb1352e | 1676 | |
5cd667b0 AW |
1677 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1678 | goto nla_put_failure; | |
1679 | ||
ccb1352e JG |
1680 | err = ovs_vport_get_options(vport, skb); |
1681 | if (err == -EMSGSIZE) | |
1682 | goto error; | |
1683 | ||
1684 | return genlmsg_end(skb, ovs_header); | |
1685 | ||
1686 | nla_put_failure: | |
1687 | err = -EMSGSIZE; | |
1688 | error: | |
1689 | genlmsg_cancel(skb, ovs_header); | |
1690 | return err; | |
1691 | } | |
1692 | ||
6093ae9a JR |
1693 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1694 | { | |
1695 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1696 | } | |
1697 | ||
1698 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
15e47304 | 1699 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1700 | u32 seq, u8 cmd) |
1701 | { | |
1702 | struct sk_buff *skb; | |
1703 | int retval; | |
1704 | ||
1705 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1706 | if (!skb) | |
1707 | return ERR_PTR(-ENOMEM); | |
1708 | ||
15e47304 | 1709 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1710 | BUG_ON(retval < 0); |
1711 | ||
ccb1352e JG |
1712 | return skb; |
1713 | } | |
1714 | ||
8e4e1713 | 1715 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 PS |
1716 | static struct vport *lookup_vport(struct net *net, |
1717 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1718 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1719 | { | |
1720 | struct datapath *dp; | |
1721 | struct vport *vport; | |
1722 | ||
1723 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1724 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1725 | if (!vport) |
1726 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1727 | if (ovs_header->dp_ifindex && |
1728 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1729 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1730 | return vport; |
1731 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1732 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1733 | ||
1734 | if (port_no >= DP_MAX_PORTS) | |
1735 | return ERR_PTR(-EFBIG); | |
1736 | ||
46df7b81 | 1737 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1738 | if (!dp) |
1739 | return ERR_PTR(-ENODEV); | |
1740 | ||
8e4e1713 | 1741 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1742 | if (!vport) |
14408dba | 1743 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1744 | return vport; |
1745 | } else | |
1746 | return ERR_PTR(-EINVAL); | |
1747 | } | |
1748 | ||
1749 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
1750 | { | |
1751 | struct nlattr **a = info->attrs; | |
1752 | struct ovs_header *ovs_header = info->userhdr; | |
1753 | struct vport_parms parms; | |
1754 | struct sk_buff *reply; | |
1755 | struct vport *vport; | |
1756 | struct datapath *dp; | |
1757 | u32 port_no; | |
1758 | int err; | |
1759 | ||
ccb1352e JG |
1760 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1761 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a JR |
1762 | return -EINVAL; |
1763 | ||
1764 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1765 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1766 | if (port_no >= DP_MAX_PORTS) | |
1767 | return -EFBIG; | |
1768 | ||
1769 | reply = ovs_vport_cmd_alloc_info(); | |
1770 | if (!reply) | |
1771 | return -ENOMEM; | |
ccb1352e | 1772 | |
8e4e1713 | 1773 | ovs_lock(); |
62b9c8d0 | 1774 | restart: |
46df7b81 | 1775 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1776 | err = -ENODEV; |
1777 | if (!dp) | |
6093ae9a | 1778 | goto exit_unlock_free; |
ccb1352e | 1779 | |
6093ae9a | 1780 | if (port_no) { |
8e4e1713 | 1781 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1782 | err = -EBUSY; |
1783 | if (vport) | |
6093ae9a | 1784 | goto exit_unlock_free; |
ccb1352e JG |
1785 | } else { |
1786 | for (port_no = 1; ; port_no++) { | |
1787 | if (port_no >= DP_MAX_PORTS) { | |
1788 | err = -EFBIG; | |
6093ae9a | 1789 | goto exit_unlock_free; |
ccb1352e | 1790 | } |
8e4e1713 | 1791 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1792 | if (!vport) |
1793 | break; | |
1794 | } | |
1795 | } | |
1796 | ||
1797 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
1798 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1799 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
1800 | parms.dp = dp; | |
1801 | parms.port_no = port_no; | |
5cd667b0 | 1802 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
1803 | |
1804 | vport = new_vport(&parms); | |
1805 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
1806 | if (IS_ERR(vport)) { |
1807 | if (err == -EAGAIN) | |
1808 | goto restart; | |
6093ae9a | 1809 | goto exit_unlock_free; |
62b9c8d0 | 1810 | } |
ccb1352e | 1811 | |
6093ae9a JR |
1812 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1813 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1814 | BUG_ON(err < 0); | |
1815 | ovs_unlock(); | |
ed661185 | 1816 | |
2a94fe48 | 1817 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1818 | return 0; |
ccb1352e | 1819 | |
6093ae9a | 1820 | exit_unlock_free: |
8e4e1713 | 1821 | ovs_unlock(); |
6093ae9a | 1822 | kfree_skb(reply); |
ccb1352e JG |
1823 | return err; |
1824 | } | |
1825 | ||
1826 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1827 | { | |
1828 | struct nlattr **a = info->attrs; | |
1829 | struct sk_buff *reply; | |
1830 | struct vport *vport; | |
1831 | int err; | |
1832 | ||
6093ae9a JR |
1833 | reply = ovs_vport_cmd_alloc_info(); |
1834 | if (!reply) | |
1835 | return -ENOMEM; | |
1836 | ||
8e4e1713 | 1837 | ovs_lock(); |
46df7b81 | 1838 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1839 | err = PTR_ERR(vport); |
1840 | if (IS_ERR(vport)) | |
6093ae9a | 1841 | goto exit_unlock_free; |
ccb1352e | 1842 | |
ccb1352e | 1843 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 1844 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 1845 | err = -EINVAL; |
6093ae9a | 1846 | goto exit_unlock_free; |
a9341512 JG |
1847 | } |
1848 | ||
f44f3408 | 1849 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 1850 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 1851 | if (err) |
6093ae9a | 1852 | goto exit_unlock_free; |
f44f3408 | 1853 | } |
a9341512 | 1854 | |
5cd667b0 AW |
1855 | |
1856 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
1857 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
1858 | ||
1859 | err = ovs_vport_set_upcall_portids(vport, ids); | |
1860 | if (err) | |
1861 | goto exit_unlock_free; | |
1862 | } | |
ccb1352e | 1863 | |
a9341512 JG |
1864 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1865 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1866 | BUG_ON(err < 0); | |
ccb1352e | 1867 | |
8e4e1713 | 1868 | ovs_unlock(); |
2a94fe48 | 1869 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 1870 | return 0; |
ccb1352e | 1871 | |
6093ae9a | 1872 | exit_unlock_free: |
8e4e1713 | 1873 | ovs_unlock(); |
6093ae9a | 1874 | kfree_skb(reply); |
ccb1352e JG |
1875 | return err; |
1876 | } | |
1877 | ||
1878 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1879 | { | |
1880 | struct nlattr **a = info->attrs; | |
1881 | struct sk_buff *reply; | |
1882 | struct vport *vport; | |
1883 | int err; | |
1884 | ||
6093ae9a JR |
1885 | reply = ovs_vport_cmd_alloc_info(); |
1886 | if (!reply) | |
1887 | return -ENOMEM; | |
1888 | ||
8e4e1713 | 1889 | ovs_lock(); |
46df7b81 | 1890 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1891 | err = PTR_ERR(vport); |
1892 | if (IS_ERR(vport)) | |
6093ae9a | 1893 | goto exit_unlock_free; |
ccb1352e JG |
1894 | |
1895 | if (vport->port_no == OVSP_LOCAL) { | |
1896 | err = -EINVAL; | |
6093ae9a | 1897 | goto exit_unlock_free; |
ccb1352e JG |
1898 | } |
1899 | ||
6093ae9a JR |
1900 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1901 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
1902 | BUG_ON(err < 0); | |
ccb1352e | 1903 | ovs_dp_detach_port(vport); |
6093ae9a | 1904 | ovs_unlock(); |
ccb1352e | 1905 | |
2a94fe48 | 1906 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1907 | return 0; |
ccb1352e | 1908 | |
6093ae9a | 1909 | exit_unlock_free: |
8e4e1713 | 1910 | ovs_unlock(); |
6093ae9a | 1911 | kfree_skb(reply); |
ccb1352e JG |
1912 | return err; |
1913 | } | |
1914 | ||
1915 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1916 | { | |
1917 | struct nlattr **a = info->attrs; | |
1918 | struct ovs_header *ovs_header = info->userhdr; | |
1919 | struct sk_buff *reply; | |
1920 | struct vport *vport; | |
1921 | int err; | |
1922 | ||
6093ae9a JR |
1923 | reply = ovs_vport_cmd_alloc_info(); |
1924 | if (!reply) | |
1925 | return -ENOMEM; | |
1926 | ||
ccb1352e | 1927 | rcu_read_lock(); |
46df7b81 | 1928 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
1929 | err = PTR_ERR(vport); |
1930 | if (IS_ERR(vport)) | |
6093ae9a JR |
1931 | goto exit_unlock_free; |
1932 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
1933 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1934 | BUG_ON(err < 0); | |
ccb1352e JG |
1935 | rcu_read_unlock(); |
1936 | ||
1937 | return genlmsg_reply(reply, info); | |
1938 | ||
6093ae9a | 1939 | exit_unlock_free: |
ccb1352e | 1940 | rcu_read_unlock(); |
6093ae9a | 1941 | kfree_skb(reply); |
ccb1352e JG |
1942 | return err; |
1943 | } | |
1944 | ||
1945 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1946 | { | |
1947 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
1948 | struct datapath *dp; | |
15eac2a7 PS |
1949 | int bucket = cb->args[0], skip = cb->args[1]; |
1950 | int i, j = 0; | |
ccb1352e | 1951 | |
42ee19e2 | 1952 | rcu_read_lock(); |
46df7b81 | 1953 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
1954 | if (!dp) { |
1955 | rcu_read_unlock(); | |
ccb1352e | 1956 | return -ENODEV; |
42ee19e2 | 1957 | } |
15eac2a7 | 1958 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 1959 | struct vport *vport; |
15eac2a7 PS |
1960 | |
1961 | j = 0; | |
b67bfe0d | 1962 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
1963 | if (j >= skip && |
1964 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 1965 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
1966 | cb->nlh->nlmsg_seq, |
1967 | NLM_F_MULTI, | |
1968 | OVS_VPORT_CMD_NEW) < 0) | |
1969 | goto out; | |
1970 | ||
1971 | j++; | |
1972 | } | |
1973 | skip = 0; | |
ccb1352e | 1974 | } |
15eac2a7 | 1975 | out: |
ccb1352e JG |
1976 | rcu_read_unlock(); |
1977 | ||
15eac2a7 PS |
1978 | cb->args[0] = i; |
1979 | cb->args[1] = j; | |
ccb1352e | 1980 | |
15eac2a7 | 1981 | return skb->len; |
ccb1352e JG |
1982 | } |
1983 | ||
0c200ef9 PS |
1984 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
1985 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1986 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
1987 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
1988 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
1989 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1990 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
1991 | }; | |
1992 | ||
48e48a70 | 1993 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e JG |
1994 | { .cmd = OVS_VPORT_CMD_NEW, |
1995 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1996 | .policy = vport_policy, | |
1997 | .doit = ovs_vport_cmd_new | |
1998 | }, | |
1999 | { .cmd = OVS_VPORT_CMD_DEL, | |
2000 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2001 | .policy = vport_policy, | |
2002 | .doit = ovs_vport_cmd_del | |
2003 | }, | |
2004 | { .cmd = OVS_VPORT_CMD_GET, | |
2005 | .flags = 0, /* OK for unprivileged users. */ | |
2006 | .policy = vport_policy, | |
2007 | .doit = ovs_vport_cmd_get, | |
2008 | .dumpit = ovs_vport_cmd_dump | |
2009 | }, | |
2010 | { .cmd = OVS_VPORT_CMD_SET, | |
2011 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
2012 | .policy = vport_policy, | |
2013 | .doit = ovs_vport_cmd_set, | |
2014 | }, | |
2015 | }; | |
2016 | ||
0c200ef9 PS |
2017 | struct genl_family dp_vport_genl_family = { |
2018 | .id = GENL_ID_GENERATE, | |
2019 | .hdrsize = sizeof(struct ovs_header), | |
2020 | .name = OVS_VPORT_FAMILY, | |
2021 | .version = OVS_VPORT_VERSION, | |
2022 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2023 | .netnsok = true, | |
2024 | .parallel_ops = true, | |
2025 | .ops = dp_vport_genl_ops, | |
2026 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2027 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2028 | .n_mcgrps = 1, | |
ccb1352e JG |
2029 | }; |
2030 | ||
0c200ef9 PS |
2031 | static struct genl_family * const dp_genl_families[] = { |
2032 | &dp_datapath_genl_family, | |
2033 | &dp_vport_genl_family, | |
2034 | &dp_flow_genl_family, | |
2035 | &dp_packet_genl_family, | |
ccb1352e JG |
2036 | }; |
2037 | ||
2038 | static void dp_unregister_genl(int n_families) | |
2039 | { | |
2040 | int i; | |
2041 | ||
2042 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2043 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2044 | } |
2045 | ||
2046 | static int dp_register_genl(void) | |
2047 | { | |
ccb1352e JG |
2048 | int err; |
2049 | int i; | |
2050 | ||
ccb1352e | 2051 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2052 | |
0c200ef9 | 2053 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2054 | if (err) |
2055 | goto error; | |
ccb1352e JG |
2056 | } |
2057 | ||
2058 | return 0; | |
2059 | ||
2060 | error: | |
0c200ef9 | 2061 | dp_unregister_genl(i); |
ccb1352e JG |
2062 | return err; |
2063 | } | |
2064 | ||
46df7b81 PS |
2065 | static int __net_init ovs_init_net(struct net *net) |
2066 | { | |
2067 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2068 | ||
2069 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2070 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
46df7b81 PS |
2071 | return 0; |
2072 | } | |
2073 | ||
2074 | static void __net_exit ovs_exit_net(struct net *net) | |
2075 | { | |
46df7b81 | 2076 | struct datapath *dp, *dp_next; |
8e4e1713 | 2077 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
46df7b81 | 2078 | |
8e4e1713 | 2079 | ovs_lock(); |
46df7b81 PS |
2080 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2081 | __dp_destroy(dp); | |
8e4e1713 PS |
2082 | ovs_unlock(); |
2083 | ||
2084 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2085 | } |
2086 | ||
2087 | static struct pernet_operations ovs_net_ops = { | |
2088 | .init = ovs_init_net, | |
2089 | .exit = ovs_exit_net, | |
2090 | .id = &ovs_net_id, | |
2091 | .size = sizeof(struct ovs_net), | |
2092 | }; | |
2093 | ||
ccb1352e JG |
2094 | static int __init dp_init(void) |
2095 | { | |
ccb1352e JG |
2096 | int err; |
2097 | ||
3523b29b | 2098 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2099 | |
2100 | pr_info("Open vSwitch switching datapath\n"); | |
2101 | ||
971427f3 | 2102 | err = action_fifos_init(); |
ccb1352e JG |
2103 | if (err) |
2104 | goto error; | |
2105 | ||
971427f3 AZ |
2106 | err = ovs_internal_dev_rtnl_link_register(); |
2107 | if (err) | |
2108 | goto error_action_fifos_exit; | |
2109 | ||
5b9e7e16 JP |
2110 | err = ovs_flow_init(); |
2111 | if (err) | |
2112 | goto error_unreg_rtnl_link; | |
2113 | ||
ccb1352e JG |
2114 | err = ovs_vport_init(); |
2115 | if (err) | |
2116 | goto error_flow_exit; | |
2117 | ||
46df7b81 | 2118 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2119 | if (err) |
2120 | goto error_vport_exit; | |
2121 | ||
46df7b81 PS |
2122 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2123 | if (err) | |
2124 | goto error_netns_exit; | |
2125 | ||
62b9c8d0 TG |
2126 | err = ovs_netdev_init(); |
2127 | if (err) | |
2128 | goto error_unreg_notifier; | |
2129 | ||
ccb1352e JG |
2130 | err = dp_register_genl(); |
2131 | if (err < 0) | |
62b9c8d0 | 2132 | goto error_unreg_netdev; |
ccb1352e | 2133 | |
ccb1352e JG |
2134 | return 0; |
2135 | ||
62b9c8d0 TG |
2136 | error_unreg_netdev: |
2137 | ovs_netdev_exit(); | |
ccb1352e JG |
2138 | error_unreg_notifier: |
2139 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2140 | error_netns_exit: |
2141 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2142 | error_vport_exit: |
2143 | ovs_vport_exit(); | |
2144 | error_flow_exit: | |
2145 | ovs_flow_exit(); | |
5b9e7e16 JP |
2146 | error_unreg_rtnl_link: |
2147 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2148 | error_action_fifos_exit: |
2149 | action_fifos_exit(); | |
ccb1352e JG |
2150 | error: |
2151 | return err; | |
2152 | } | |
2153 | ||
2154 | static void dp_cleanup(void) | |
2155 | { | |
ccb1352e | 2156 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2157 | ovs_netdev_exit(); |
ccb1352e | 2158 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2159 | unregister_pernet_device(&ovs_net_ops); |
2160 | rcu_barrier(); | |
ccb1352e JG |
2161 | ovs_vport_exit(); |
2162 | ovs_flow_exit(); | |
5b9e7e16 | 2163 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2164 | action_fifos_exit(); |
ccb1352e JG |
2165 | } |
2166 | ||
2167 | module_init(dp_init); | |
2168 | module_exit(dp_cleanup); | |
2169 | ||
2170 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2171 | MODULE_LICENSE("GPL"); |