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Commit | Line | Data |
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064af421 | 1 | /* |
a1c564be | 2 | * Copyright (c) 2007-2013 Nicira, Inc. |
a14bc59f | 3 | * |
a9a29d22 JG |
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 | |
064af421 BP |
17 | */ |
18 | ||
dfffaef1 JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
064af421 BP |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> | |
064af421 | 23 | #include <linux/if_arp.h> |
064af421 BP |
24 | #include <linux/if_vlan.h> |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
982b8810 | 27 | #include <linux/jhash.h> |
064af421 BP |
28 | #include <linux/delay.h> |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
ed099e92 | 31 | #include <linux/genetlink.h> |
064af421 BP |
32 | #include <linux/kernel.h> |
33 | #include <linux/kthread.h> | |
064af421 BP |
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> | |
39 | #include <linux/version.h> | |
40 | #include <linux/ethtool.h> | |
064af421 | 41 | #include <linux/wait.h> |
064af421 | 42 | #include <asm/div64.h> |
656a0e37 | 43 | #include <linux/highmem.h> |
064af421 BP |
44 | #include <linux/netfilter_bridge.h> |
45 | #include <linux/netfilter_ipv4.h> | |
46 | #include <linux/inetdevice.h> | |
47 | #include <linux/list.h> | |
077257b8 | 48 | #include <linux/openvswitch.h> |
064af421 | 49 | #include <linux/rculist.h> |
064af421 | 50 | #include <linux/dmi.h> |
cd2a59e9 PS |
51 | #include <linux/genetlink.h> |
52 | #include <net/genetlink.h> | |
36956a7d | 53 | #include <net/genetlink.h> |
2a4999f3 PS |
54 | #include <net/net_namespace.h> |
55 | #include <net/netns/generic.h> | |
064af421 | 56 | |
dd8d6b8c | 57 | #include "checksum.h" |
064af421 | 58 | #include "datapath.h" |
064af421 | 59 | #include "flow.h" |
303708cc | 60 | #include "vlan.h" |
f2459fe7 | 61 | #include "vport-internal_dev.h" |
d5de5b0d | 62 | #include "vport-netdev.h" |
064af421 | 63 | |
acd051f1 PS |
64 | #define REHASH_FLOW_INTERVAL (10 * 60 * HZ) |
65 | static void rehash_flow_table(struct work_struct *work); | |
66 | static DECLARE_DELAYED_WORK(rehash_flow_wq, rehash_flow_table); | |
67 | ||
2a4999f3 PS |
68 | int ovs_net_id __read_mostly; |
69 | ||
e297c6b7 TG |
70 | static void ovs_notify(struct sk_buff *skb, struct genl_info *info, |
71 | struct genl_multicast_group *grp) | |
72 | { | |
73 | genl_notify(skb, genl_info_net(info), info->snd_portid, | |
74 | grp->id, info->nlhdr, GFP_KERNEL); | |
75 | } | |
76 | ||
ed099e92 BP |
77 | /** |
78 | * DOC: Locking: | |
064af421 | 79 | * |
cd2a59e9 PS |
80 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
81 | * operations on vports, etc.), Writes to other state (flow table | |
82 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
83 | * by ovs_lock. | |
ed099e92 BP |
84 | * |
85 | * Reads are protected by RCU. | |
86 | * | |
87 | * There are a few special cases (mostly stats) that have their own | |
88 | * synchronization but they nest under all of above and don't interact with | |
89 | * each other. | |
cd2a59e9 PS |
90 | * |
91 | * The RTNL lock nests inside ovs_mutex. | |
064af421 | 92 | */ |
ed099e92 | 93 | |
cd2a59e9 PS |
94 | static DEFINE_MUTEX(ovs_mutex); |
95 | ||
96 | void ovs_lock(void) | |
97 | { | |
98 | mutex_lock(&ovs_mutex); | |
99 | } | |
100 | ||
101 | void ovs_unlock(void) | |
102 | { | |
103 | mutex_unlock(&ovs_mutex); | |
104 | } | |
105 | ||
106 | #ifdef CONFIG_LOCKDEP | |
107 | int lockdep_ovsl_is_held(void) | |
108 | { | |
109 | if (debug_locks) | |
110 | return lockdep_is_held(&ovs_mutex); | |
111 | else | |
112 | return 1; | |
113 | } | |
114 | #endif | |
115 | ||
c19e6535 | 116 | static struct vport *new_vport(const struct vport_parms *); |
2a4999f3 | 117 | static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *, |
7257b535 | 118 | const struct dp_upcall_info *); |
2a4999f3 PS |
119 | static int queue_userspace_packet(struct net *, int dp_ifindex, |
120 | struct sk_buff *, | |
7257b535 | 121 | const struct dp_upcall_info *); |
064af421 | 122 | |
cd2a59e9 | 123 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 124 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
064af421 | 125 | { |
254f2dc8 BP |
126 | struct datapath *dp = NULL; |
127 | struct net_device *dev; | |
ed099e92 | 128 | |
254f2dc8 | 129 | rcu_read_lock(); |
2a4999f3 | 130 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
254f2dc8 | 131 | if (dev) { |
850b6b3b | 132 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 BP |
133 | if (vport) |
134 | dp = vport->dp; | |
135 | } | |
136 | rcu_read_unlock(); | |
137 | ||
138 | return dp; | |
064af421 | 139 | } |
064af421 | 140 | |
cd2a59e9 | 141 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 142 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 143 | { |
cd2a59e9 | 144 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
16b82e84 | 145 | return vport->ops->get_name(vport); |
f2459fe7 JG |
146 | } |
147 | ||
99769a40 JG |
148 | static int get_dpifindex(struct datapath *dp) |
149 | { | |
150 | struct vport *local; | |
151 | int ifindex; | |
152 | ||
153 | rcu_read_lock(); | |
154 | ||
95b1d73a | 155 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 156 | if (local) |
d5de5b0d | 157 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
99769a40 JG |
158 | else |
159 | ifindex = 0; | |
160 | ||
161 | rcu_read_unlock(); | |
162 | ||
163 | return ifindex; | |
164 | } | |
165 | ||
46c6a11d JG |
166 | static void destroy_dp_rcu(struct rcu_head *rcu) |
167 | { | |
168 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 169 | |
a1c564be | 170 | ovs_flow_tbl_destroy((__force struct flow_table *)dp->table, false); |
46c6a11d | 171 | free_percpu(dp->stats_percpu); |
2a4999f3 | 172 | release_net(ovs_dp_get_net(dp)); |
95b1d73a | 173 | kfree(dp->ports); |
5ca1ba48 | 174 | kfree(dp); |
46c6a11d JG |
175 | } |
176 | ||
95b1d73a PS |
177 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
178 | u16 port_no) | |
179 | { | |
180 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
181 | } | |
182 | ||
183 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) | |
184 | { | |
185 | struct vport *vport; | |
95b1d73a PS |
186 | struct hlist_head *head; |
187 | ||
188 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 189 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
190 | if (vport->port_no == port_no) |
191 | return vport; | |
192 | } | |
193 | return NULL; | |
194 | } | |
195 | ||
cd2a59e9 | 196 | /* Called with ovs_mutex. */ |
c19e6535 | 197 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 198 | { |
f2459fe7 | 199 | struct vport *vport; |
f2459fe7 | 200 | |
850b6b3b | 201 | vport = ovs_vport_add(parms); |
c19e6535 BP |
202 | if (!IS_ERR(vport)) { |
203 | struct datapath *dp = parms->dp; | |
95b1d73a | 204 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 205 | |
95b1d73a | 206 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 207 | } |
c19e6535 | 208 | return vport; |
064af421 BP |
209 | } |
210 | ||
850b6b3b | 211 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 212 | { |
cd2a59e9 | 213 | ASSERT_OVSL(); |
064af421 | 214 | |
064af421 | 215 | /* First drop references to device. */ |
95b1d73a | 216 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 217 | |
7237e4f4 | 218 | /* Then destroy it. */ |
850b6b3b | 219 | ovs_vport_del(p); |
064af421 BP |
220 | } |
221 | ||
8819fac7 | 222 | /* Must be called with rcu_read_lock. */ |
850b6b3b | 223 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
224 | { |
225 | struct datapath *dp = p->dp; | |
3544358a | 226 | struct sw_flow *flow; |
064af421 | 227 | struct dp_stats_percpu *stats; |
52a23d92 | 228 | struct sw_flow_key key; |
e9141eec | 229 | u64 *stats_counter; |
4c1ad233 | 230 | int error; |
064af421 | 231 | |
70dbc259 | 232 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 233 | |
52a23d92 | 234 | /* Extract flow from 'skb' into 'key'. */ |
a1c564be | 235 | error = ovs_flow_extract(skb, p->port_no, &key); |
52a23d92 JG |
236 | if (unlikely(error)) { |
237 | kfree_skb(skb); | |
238 | return; | |
55574bb0 BP |
239 | } |
240 | ||
52a23d92 | 241 | /* Look up flow. */ |
a1c564be | 242 | flow = ovs_flow_lookup(rcu_dereference(dp->table), &key); |
52a23d92 JG |
243 | if (unlikely(!flow)) { |
244 | struct dp_upcall_info upcall; | |
245 | ||
246 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
247 | upcall.key = &key; | |
248 | upcall.userdata = NULL; | |
249 | upcall.portid = p->upcall_portid; | |
250 | ovs_dp_upcall(dp, skb, &upcall); | |
251 | consume_skb(skb); | |
252 | stats_counter = &stats->n_missed; | |
253 | goto out; | |
254 | } | |
255 | ||
256 | OVS_CB(skb)->flow = flow; | |
d1d71a36 | 257 | OVS_CB(skb)->pkt_key = &key; |
52a23d92 | 258 | |
e9141eec | 259 | stats_counter = &stats->n_hit; |
850b6b3b JG |
260 | ovs_flow_used(OVS_CB(skb)->flow, skb); |
261 | ovs_execute_actions(dp, skb); | |
55574bb0 | 262 | |
8819fac7 | 263 | out: |
55574bb0 | 264 | /* Update datapath statistics. */ |
821cb9fa | 265 | u64_stats_update_begin(&stats->sync); |
e9141eec | 266 | (*stats_counter)++; |
821cb9fa | 267 | u64_stats_update_end(&stats->sync); |
064af421 BP |
268 | } |
269 | ||
aa5a8fdc JG |
270 | static struct genl_family dp_packet_genl_family = { |
271 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
272 | .hdrsize = sizeof(struct ovs_header), |
273 | .name = OVS_PACKET_FAMILY, | |
69685a88 | 274 | .version = OVS_PACKET_VERSION, |
2a4999f3 PS |
275 | .maxattr = OVS_PACKET_ATTR_MAX, |
276 | SET_NETNSOK | |
14002a59 | 277 | SET_PARALLEL_OPS |
aa5a8fdc JG |
278 | }; |
279 | ||
850b6b3b JG |
280 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
281 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc JG |
282 | { |
283 | struct dp_stats_percpu *stats; | |
7257b535 | 284 | int dp_ifindex; |
aa5a8fdc JG |
285 | int err; |
286 | ||
28aea917 | 287 | if (upcall_info->portid == 0) { |
b063d9f0 | 288 | err = -ENOTCONN; |
b063d9f0 JG |
289 | goto err; |
290 | } | |
291 | ||
7257b535 BP |
292 | dp_ifindex = get_dpifindex(dp); |
293 | if (!dp_ifindex) { | |
294 | err = -ENODEV; | |
295 | goto err; | |
aa5a8fdc JG |
296 | } |
297 | ||
7257b535 | 298 | forward_ip_summed(skb, true); |
36ce148c | 299 | |
7257b535 | 300 | if (!skb_is_gso(skb)) |
2a4999f3 | 301 | err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
7257b535 | 302 | else |
2a4999f3 | 303 | err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
d76195db JG |
304 | if (err) |
305 | goto err; | |
306 | ||
307 | return 0; | |
aa5a8fdc | 308 | |
aa5a8fdc | 309 | err: |
70dbc259 | 310 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 311 | |
821cb9fa | 312 | u64_stats_update_begin(&stats->sync); |
aa5a8fdc | 313 | stats->n_lost++; |
821cb9fa | 314 | u64_stats_update_end(&stats->sync); |
aa5a8fdc | 315 | |
aa5a8fdc | 316 | return err; |
982b8810 BP |
317 | } |
318 | ||
2a4999f3 PS |
319 | static int queue_gso_packets(struct net *net, int dp_ifindex, |
320 | struct sk_buff *skb, | |
7257b535 | 321 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 322 | { |
d4cba1f8 | 323 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
324 | struct dp_upcall_info later_info; |
325 | struct sw_flow_key later_key; | |
326 | struct sk_buff *segs, *nskb; | |
327 | int err; | |
cb5087ca | 328 | |
0aa52d88 | 329 | segs = __skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM, false); |
79089764 PS |
330 | if (IS_ERR(segs)) |
331 | return PTR_ERR(segs); | |
99769a40 | 332 | |
7257b535 BP |
333 | /* Queue all of the segments. */ |
334 | skb = segs; | |
cb5087ca | 335 | do { |
2a4999f3 | 336 | err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info); |
982b8810 | 337 | if (err) |
7257b535 | 338 | break; |
856081f6 | 339 | |
d4cba1f8 | 340 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
e1cf87ff JG |
341 | /* The initial flow key extracted by ovs_flow_extract() |
342 | * in this case is for a first fragment, so we need to | |
7257b535 BP |
343 | * properly mark later fragments. |
344 | */ | |
345 | later_key = *upcall_info->key; | |
9e44d715 | 346 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
7257b535 BP |
347 | |
348 | later_info = *upcall_info; | |
349 | later_info.key = &later_key; | |
350 | upcall_info = &later_info; | |
351 | } | |
36ce148c | 352 | } while ((skb = skb->next)); |
cb5087ca | 353 | |
7257b535 BP |
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 | ||
0afa2373 TG |
366 | static size_t key_attr_size(void) |
367 | { | |
368 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
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 */ | |
377 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ | |
378 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
379 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
380 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
381 | + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */ | |
382 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
383 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
384 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
385 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
386 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
387 | } | |
388 | ||
389 | static size_t upcall_msg_size(const struct sk_buff *skb, | |
390 | const struct nlattr *userdata) | |
391 | { | |
392 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
393 | + nla_total_size(skb->len) /* OVS_PACKET_ATTR_PACKET */ | |
394 | + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */ | |
395 | ||
396 | /* OVS_PACKET_ATTR_USERDATA */ | |
397 | if (userdata) | |
398 | size += NLA_ALIGN(userdata->nla_len); | |
399 | ||
400 | return size; | |
401 | } | |
402 | ||
2a4999f3 PS |
403 | static int queue_userspace_packet(struct net *net, int dp_ifindex, |
404 | struct sk_buff *skb, | |
7257b535 BP |
405 | const struct dp_upcall_info *upcall_info) |
406 | { | |
407 | struct ovs_header *upcall; | |
6161d3fd | 408 | struct sk_buff *nskb = NULL; |
7257b535 BP |
409 | struct sk_buff *user_skb; /* to be queued to userspace */ |
410 | struct nlattr *nla; | |
7257b535 BP |
411 | int err; |
412 | ||
6161d3fd JG |
413 | if (vlan_tx_tag_present(skb)) { |
414 | nskb = skb_clone(skb, GFP_ATOMIC); | |
415 | if (!nskb) | |
416 | return -ENOMEM; | |
417 | ||
418 | err = vlan_deaccel_tag(nskb); | |
419 | if (err) | |
420 | return err; | |
7257b535 | 421 | |
6161d3fd JG |
422 | skb = nskb; |
423 | } | |
424 | ||
425 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
426 | err = -EFBIG; | |
427 | goto out; | |
428 | } | |
7257b535 | 429 | |
0afa2373 | 430 | user_skb = genlmsg_new(upcall_msg_size(skb, upcall_info->userdata), GFP_ATOMIC); |
6161d3fd JG |
431 | if (!user_skb) { |
432 | err = -ENOMEM; | |
433 | goto out; | |
434 | } | |
7257b535 BP |
435 | |
436 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
437 | 0, upcall_info->cmd); | |
438 | upcall->dp_ifindex = dp_ifindex; | |
439 | ||
440 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
a1c564be | 441 | ovs_flow_to_nlattrs(upcall_info->key, upcall_info->key, user_skb); |
7257b535 BP |
442 | nla_nest_end(user_skb, nla); |
443 | ||
444 | if (upcall_info->userdata) | |
e995e3df | 445 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 446 | nla_len(upcall_info->userdata), |
e995e3df | 447 | nla_data(upcall_info->userdata)); |
7257b535 BP |
448 | |
449 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); | |
bed53bd1 PS |
450 | |
451 | skb_copy_and_csum_dev(skb, nla_data(nla)); | |
7257b535 | 452 | |
c39b1a5c | 453 | genlmsg_end(user_skb, upcall); |
28aea917 | 454 | err = genlmsg_unicast(net, user_skb, upcall_info->portid); |
6161d3fd JG |
455 | |
456 | out: | |
457 | kfree_skb(nskb); | |
458 | return err; | |
cb5087ca BP |
459 | } |
460 | ||
cd2a59e9 | 461 | /* Called with ovs_mutex. */ |
2a4999f3 | 462 | static int flush_flows(struct datapath *dp) |
064af421 | 463 | { |
3544358a PS |
464 | struct flow_table *old_table; |
465 | struct flow_table *new_table; | |
8d5ebd83 | 466 | |
cd2a59e9 | 467 | old_table = ovsl_dereference(dp->table); |
850b6b3b | 468 | new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS); |
8d5ebd83 | 469 | if (!new_table) |
ed099e92 | 470 | return -ENOMEM; |
8d5ebd83 JG |
471 | |
472 | rcu_assign_pointer(dp->table, new_table); | |
473 | ||
a1c564be | 474 | ovs_flow_tbl_destroy(old_table, true); |
ed099e92 | 475 | return 0; |
064af421 BP |
476 | } |
477 | ||
9b405f1a PS |
478 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, int attr_len) |
479 | { | |
480 | ||
481 | struct sw_flow_actions *acts; | |
482 | int new_acts_size; | |
483 | int req_size = NLA_ALIGN(attr_len); | |
484 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
485 | (*sfa)->actions_len; | |
486 | ||
ba400435 | 487 | if (req_size <= (ksize(*sfa) - next_offset)) |
9b405f1a PS |
488 | goto out; |
489 | ||
ba400435 | 490 | new_acts_size = ksize(*sfa) * 2; |
9b405f1a PS |
491 | |
492 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
493 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
494 | return ERR_PTR(-EMSGSIZE); | |
495 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
496 | } | |
497 | ||
498 | acts = ovs_flow_actions_alloc(new_acts_size); | |
499 | if (IS_ERR(acts)) | |
500 | return (void *)acts; | |
501 | ||
502 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
503 | acts->actions_len = (*sfa)->actions_len; | |
ba400435 | 504 | kfree(*sfa); |
9b405f1a PS |
505 | *sfa = acts; |
506 | ||
507 | out: | |
508 | (*sfa)->actions_len += req_size; | |
509 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
510 | } | |
511 | ||
512 | static int add_action(struct sw_flow_actions **sfa, int attrtype, void *data, int len) | |
513 | { | |
514 | struct nlattr *a; | |
515 | ||
516 | a = reserve_sfa_size(sfa, nla_attr_size(len)); | |
517 | if (IS_ERR(a)) | |
518 | return PTR_ERR(a); | |
519 | ||
520 | a->nla_type = attrtype; | |
521 | a->nla_len = nla_attr_size(len); | |
522 | ||
523 | if (data) | |
524 | memcpy(nla_data(a), data, len); | |
525 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
6ff686f2 | 526 | |
9b405f1a PS |
527 | return 0; |
528 | } | |
529 | ||
530 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, int attrtype) | |
531 | { | |
532 | int used = (*sfa)->actions_len; | |
533 | int err; | |
534 | ||
535 | err = add_action(sfa, attrtype, NULL, 0); | |
536 | if (err) | |
537 | return err; | |
538 | ||
539 | return used; | |
540 | } | |
541 | ||
542 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, int st_offset) | |
543 | { | |
544 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + st_offset); | |
545 | ||
546 | a->nla_len = sfa->actions_len - st_offset; | |
547 | } | |
548 | ||
549 | static int validate_and_copy_actions(const struct nlattr *attr, | |
550 | const struct sw_flow_key *key, int depth, | |
551 | struct sw_flow_actions **sfa); | |
552 | ||
553 | static int validate_and_copy_sample(const struct nlattr *attr, | |
554 | const struct sw_flow_key *key, int depth, | |
555 | struct sw_flow_actions **sfa) | |
6ff686f2 | 556 | { |
4be00e48 BP |
557 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; |
558 | const struct nlattr *probability, *actions; | |
559 | const struct nlattr *a; | |
9b405f1a | 560 | int rem, start, err, st_acts; |
4be00e48 BP |
561 | |
562 | memset(attrs, 0, sizeof(attrs)); | |
6455100f | 563 | nla_for_each_nested(a, attr, rem) { |
4be00e48 BP |
564 | int type = nla_type(a); |
565 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
566 | return -EINVAL; | |
567 | attrs[type] = a; | |
568 | } | |
569 | if (rem) | |
6ff686f2 | 570 | return -EINVAL; |
4be00e48 BP |
571 | |
572 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
573 | if (!probability || nla_len(probability) != sizeof(u32)) | |
6ff686f2 PS |
574 | return -EINVAL; |
575 | ||
4be00e48 BP |
576 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; |
577 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
578 | return -EINVAL; | |
9b405f1a PS |
579 | |
580 | /* validation done, copy sample action. */ | |
581 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE); | |
582 | if (start < 0) | |
583 | return start; | |
584 | err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, nla_data(probability), sizeof(u32)); | |
585 | if (err) | |
586 | return err; | |
587 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS); | |
588 | if (st_acts < 0) | |
589 | return st_acts; | |
590 | ||
591 | err = validate_and_copy_actions(actions, key, depth + 1, sfa); | |
592 | if (err) | |
593 | return err; | |
594 | ||
595 | add_nested_action_end(*sfa, st_acts); | |
596 | add_nested_action_end(*sfa, start); | |
597 | ||
598 | return 0; | |
4edb9ae9 PS |
599 | } |
600 | ||
b1323f59 PS |
601 | static int validate_tp_port(const struct sw_flow_key *flow_key) |
602 | { | |
603 | if (flow_key->eth.type == htons(ETH_P_IP)) { | |
6e9bea4d | 604 | if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst) |
b1323f59 PS |
605 | return 0; |
606 | } else if (flow_key->eth.type == htons(ETH_P_IPV6)) { | |
6e9bea4d | 607 | if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst) |
b1323f59 PS |
608 | return 0; |
609 | } | |
610 | ||
611 | return -EINVAL; | |
612 | } | |
613 | ||
9b405f1a PS |
614 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
615 | struct sw_flow_actions **sfa) | |
616 | { | |
a1c564be AZ |
617 | struct sw_flow_match match; |
618 | struct sw_flow_key key; | |
9b405f1a PS |
619 | int err, start; |
620 | ||
a1c564be | 621 | ovs_match_init(&match, &key, NULL); |
54cc3ec6 | 622 | err = ovs_ipv4_tun_from_nlattr(nla_data(attr), &match, false); |
9b405f1a PS |
623 | if (err) |
624 | return err; | |
625 | ||
626 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET); | |
627 | if (start < 0) | |
628 | return start; | |
629 | ||
a1c564be AZ |
630 | err = add_action(sfa, OVS_KEY_ATTR_IPV4_TUNNEL, &match.key->tun_key, |
631 | sizeof(match.key->tun_key)); | |
9b405f1a PS |
632 | add_nested_action_end(*sfa, start); |
633 | ||
634 | return err; | |
635 | } | |
636 | ||
fea393b1 | 637 | static int validate_set(const struct nlattr *a, |
9b405f1a PS |
638 | const struct sw_flow_key *flow_key, |
639 | struct sw_flow_actions **sfa, | |
640 | bool *set_tun) | |
4edb9ae9 | 641 | { |
4edb9ae9 PS |
642 | const struct nlattr *ovs_key = nla_data(a); |
643 | int key_type = nla_type(ovs_key); | |
644 | ||
645 | /* There can be only one key in a action */ | |
646 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
647 | return -EINVAL; | |
648 | ||
649 | if (key_type > OVS_KEY_ATTR_MAX || | |
9b405f1a PS |
650 | (ovs_key_lens[key_type] != nla_len(ovs_key) && |
651 | ovs_key_lens[key_type] != -1)) | |
4edb9ae9 PS |
652 | return -EINVAL; |
653 | ||
fea393b1 | 654 | switch (key_type) { |
4edb9ae9 | 655 | const struct ovs_key_ipv4 *ipv4_key; |
bc7a5acd | 656 | const struct ovs_key_ipv6 *ipv6_key; |
9b405f1a | 657 | int err; |
4edb9ae9 | 658 | |
fea393b1 | 659 | case OVS_KEY_ATTR_PRIORITY: |
fea393b1 | 660 | case OVS_KEY_ATTR_ETHERNET: |
4edb9ae9 PS |
661 | break; |
662 | ||
72e8bf28 AA |
663 | case OVS_KEY_ATTR_SKB_MARK: |
664 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER) | |
665 | if (nla_get_u32(ovs_key) != 0) | |
666 | return -EINVAL; | |
667 | #endif | |
668 | break; | |
669 | ||
9b405f1a PS |
670 | case OVS_KEY_ATTR_TUNNEL: |
671 | *set_tun = true; | |
672 | err = validate_and_copy_set_tun(a, sfa); | |
673 | if (err) | |
674 | return err; | |
356af50b KM |
675 | break; |
676 | ||
fea393b1 | 677 | case OVS_KEY_ATTR_IPV4: |
4edb9ae9 PS |
678 | if (flow_key->eth.type != htons(ETH_P_IP)) |
679 | return -EINVAL; | |
680 | ||
6e9bea4d | 681 | if (!flow_key->ip.proto) |
4edb9ae9 PS |
682 | return -EINVAL; |
683 | ||
684 | ipv4_key = nla_data(ovs_key); | |
685 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
686 | return -EINVAL; | |
687 | ||
9e44d715 | 688 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) |
7257b535 BP |
689 | return -EINVAL; |
690 | ||
4edb9ae9 PS |
691 | break; |
692 | ||
bc7a5acd AA |
693 | case OVS_KEY_ATTR_IPV6: |
694 | if (flow_key->eth.type != htons(ETH_P_IPV6)) | |
695 | return -EINVAL; | |
696 | ||
697 | if (!flow_key->ip.proto) | |
698 | return -EINVAL; | |
699 | ||
700 | ipv6_key = nla_data(ovs_key); | |
701 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
702 | return -EINVAL; | |
703 | ||
704 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) | |
705 | return -EINVAL; | |
706 | ||
707 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) | |
708 | return -EINVAL; | |
709 | ||
710 | break; | |
711 | ||
fea393b1 | 712 | case OVS_KEY_ATTR_TCP: |
4edb9ae9 PS |
713 | if (flow_key->ip.proto != IPPROTO_TCP) |
714 | return -EINVAL; | |
715 | ||
b1323f59 | 716 | return validate_tp_port(flow_key); |
4edb9ae9 | 717 | |
fea393b1 | 718 | case OVS_KEY_ATTR_UDP: |
4edb9ae9 PS |
719 | if (flow_key->ip.proto != IPPROTO_UDP) |
720 | return -EINVAL; | |
721 | ||
b1323f59 | 722 | return validate_tp_port(flow_key); |
4edb9ae9 | 723 | |
10f72e3d JS |
724 | case OVS_KEY_ATTR_SCTP: |
725 | if (flow_key->ip.proto != IPPROTO_SCTP) | |
726 | return -EINVAL; | |
727 | ||
728 | return validate_tp_port(flow_key); | |
729 | ||
4edb9ae9 PS |
730 | default: |
731 | return -EINVAL; | |
732 | } | |
fea393b1 | 733 | |
4edb9ae9 | 734 | return 0; |
6ff686f2 PS |
735 | } |
736 | ||
98403001 BP |
737 | static int validate_userspace(const struct nlattr *attr) |
738 | { | |
6455100f | 739 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { |
98403001 | 740 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, |
e995e3df | 741 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, |
98403001 BP |
742 | }; |
743 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
744 | int error; | |
745 | ||
6455100f PS |
746 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, |
747 | attr, userspace_policy); | |
98403001 BP |
748 | if (error) |
749 | return error; | |
750 | ||
6455100f PS |
751 | if (!a[OVS_USERSPACE_ATTR_PID] || |
752 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
98403001 BP |
753 | return -EINVAL; |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
9b405f1a PS |
758 | static int copy_action(const struct nlattr *from, |
759 | struct sw_flow_actions **sfa) | |
760 | { | |
761 | int totlen = NLA_ALIGN(from->nla_len); | |
762 | struct nlattr *to; | |
763 | ||
764 | to = reserve_sfa_size(sfa, from->nla_len); | |
765 | if (IS_ERR(to)) | |
766 | return PTR_ERR(to); | |
767 | ||
768 | memcpy(to, from, totlen); | |
769 | return 0; | |
770 | } | |
771 | ||
772 | static int validate_and_copy_actions(const struct nlattr *attr, | |
773 | const struct sw_flow_key *key, | |
774 | int depth, | |
775 | struct sw_flow_actions **sfa) | |
064af421 | 776 | { |
23cad98c | 777 | const struct nlattr *a; |
6ff686f2 PS |
778 | int rem, err; |
779 | ||
780 | if (depth >= SAMPLE_ACTION_DEPTH) | |
781 | return -EOVERFLOW; | |
23cad98c | 782 | |
37a1300c | 783 | nla_for_each_nested(a, attr, rem) { |
98403001 | 784 | /* Expected argument lengths, (u32)-1 for variable length. */ |
df2c07f4 | 785 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
fea393b1 | 786 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), |
98403001 | 787 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
fea393b1 BP |
788 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
789 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
4edb9ae9 | 790 | [OVS_ACTION_ATTR_SET] = (u32)-1, |
98403001 | 791 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1 |
23cad98c | 792 | }; |
fea393b1 | 793 | const struct ovs_action_push_vlan *vlan; |
23cad98c | 794 | int type = nla_type(a); |
9b405f1a | 795 | bool skip_copy; |
23cad98c | 796 | |
6ff686f2 | 797 | if (type > OVS_ACTION_ATTR_MAX || |
98403001 BP |
798 | (action_lens[type] != nla_len(a) && |
799 | action_lens[type] != (u32)-1)) | |
23cad98c BP |
800 | return -EINVAL; |
801 | ||
9b405f1a | 802 | skip_copy = false; |
23cad98c | 803 | switch (type) { |
df2c07f4 | 804 | case OVS_ACTION_ATTR_UNSPEC: |
cdee00fd | 805 | return -EINVAL; |
064af421 | 806 | |
98403001 BP |
807 | case OVS_ACTION_ATTR_USERSPACE: |
808 | err = validate_userspace(a); | |
809 | if (err) | |
810 | return err; | |
811 | break; | |
812 | ||
df2c07f4 | 813 | case OVS_ACTION_ATTR_OUTPUT: |
23cad98c BP |
814 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
815 | return -EINVAL; | |
3b1fc5f3 | 816 | break; |
cdee00fd | 817 | |
4edb9ae9 | 818 | |
fea393b1 BP |
819 | case OVS_ACTION_ATTR_POP_VLAN: |
820 | break; | |
821 | ||
822 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
823 | vlan = nla_data(a); | |
824 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
825 | return -EINVAL; | |
8ddc056d | 826 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) |
064af421 | 827 | return -EINVAL; |
23cad98c | 828 | break; |
064af421 | 829 | |
4edb9ae9 | 830 | case OVS_ACTION_ATTR_SET: |
9b405f1a | 831 | err = validate_set(a, key, sfa, &skip_copy); |
4edb9ae9 PS |
832 | if (err) |
833 | return err; | |
23cad98c | 834 | break; |
064af421 | 835 | |
6ff686f2 | 836 | case OVS_ACTION_ATTR_SAMPLE: |
9b405f1a | 837 | err = validate_and_copy_sample(a, key, depth, sfa); |
6ff686f2 PS |
838 | if (err) |
839 | return err; | |
9b405f1a | 840 | skip_copy = true; |
6ff686f2 PS |
841 | break; |
842 | ||
23cad98c | 843 | default: |
4edb9ae9 | 844 | return -EINVAL; |
23cad98c | 845 | } |
9b405f1a PS |
846 | if (!skip_copy) { |
847 | err = copy_action(a, sfa); | |
848 | if (err) | |
849 | return err; | |
850 | } | |
23cad98c | 851 | } |
3c5f6de3 | 852 | |
23cad98c BP |
853 | if (rem > 0) |
854 | return -EINVAL; | |
064af421 | 855 | |
23cad98c | 856 | return 0; |
064af421 | 857 | } |
4edb9ae9 | 858 | |
064af421 BP |
859 | static void clear_stats(struct sw_flow *flow) |
860 | { | |
6bfafa55 | 861 | flow->used = 0; |
064af421 | 862 | flow->tcp_flags = 0; |
064af421 BP |
863 | flow->packet_count = 0; |
864 | flow->byte_count = 0; | |
865 | } | |
866 | ||
df2c07f4 | 867 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 868 | { |
df2c07f4 | 869 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 870 | struct nlattr **a = info->attrs; |
e0e57990 | 871 | struct sw_flow_actions *acts; |
982b8810 | 872 | struct sk_buff *packet; |
e0e57990 | 873 | struct sw_flow *flow; |
f7cd0081 | 874 | struct datapath *dp; |
d6569377 | 875 | struct ethhdr *eth; |
3f19d399 | 876 | int len; |
d6569377 | 877 | int err; |
064af421 | 878 | |
f7cd0081 | 879 | err = -EINVAL; |
df2c07f4 | 880 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 881 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 882 | goto err; |
064af421 | 883 | |
df2c07f4 | 884 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 885 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
886 | err = -ENOMEM; |
887 | if (!packet) | |
e5cad958 | 888 | goto err; |
3f19d399 BP |
889 | skb_reserve(packet, NET_IP_ALIGN); |
890 | ||
bf3d6fce | 891 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 892 | |
f7cd0081 BP |
893 | skb_reset_mac_header(packet); |
894 | eth = eth_hdr(packet); | |
064af421 | 895 | |
d6569377 BP |
896 | /* Normally, setting the skb 'protocol' field would be handled by a |
897 | * call to eth_type_trans(), but it assumes there's a sending | |
898 | * device, which we may not have. */ | |
7cd46155 | 899 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
f7cd0081 | 900 | packet->protocol = eth->h_proto; |
d6569377 | 901 | else |
f7cd0081 | 902 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 903 | |
e0e57990 | 904 | /* Build an sw_flow for sending this packet. */ |
850b6b3b | 905 | flow = ovs_flow_alloc(); |
e0e57990 BP |
906 | err = PTR_ERR(flow); |
907 | if (IS_ERR(flow)) | |
e5cad958 | 908 | goto err_kfree_skb; |
064af421 | 909 | |
a1c564be | 910 | err = ovs_flow_extract(packet, -1, &flow->key); |
e0e57990 | 911 | if (err) |
9321954a | 912 | goto err_flow_free; |
e0e57990 | 913 | |
a1c564be | 914 | err = ovs_flow_metadata_from_nlattrs(flow, a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 | 915 | if (err) |
9321954a | 916 | goto err_flow_free; |
9b405f1a | 917 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
e0e57990 BP |
918 | err = PTR_ERR(acts); |
919 | if (IS_ERR(acts)) | |
9321954a | 920 | goto err_flow_free; |
9b405f1a PS |
921 | |
922 | err = validate_and_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0, &acts); | |
e0e57990 | 923 | rcu_assign_pointer(flow->sf_acts, acts); |
9b405f1a PS |
924 | if (err) |
925 | goto err_flow_free; | |
e0e57990 BP |
926 | |
927 | OVS_CB(packet)->flow = flow; | |
d1d71a36 | 928 | OVS_CB(packet)->pkt_key = &flow->key; |
abff858b | 929 | packet->priority = flow->key.phy.priority; |
72e8bf28 | 930 | skb_set_mark(packet, flow->key.phy.skb_mark); |
e0e57990 | 931 | |
d6569377 | 932 | rcu_read_lock(); |
2a4999f3 | 933 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 934 | err = -ENODEV; |
e5cad958 BP |
935 | if (!dp) |
936 | goto err_unlock; | |
cc4015df | 937 | |
e9141eec | 938 | local_bh_disable(); |
850b6b3b | 939 | err = ovs_execute_actions(dp, packet); |
e9141eec | 940 | local_bh_enable(); |
d6569377 | 941 | rcu_read_unlock(); |
e0e57990 | 942 | |
a1c564be | 943 | ovs_flow_free(flow, false); |
e5cad958 | 944 | return err; |
064af421 | 945 | |
e5cad958 BP |
946 | err_unlock: |
947 | rcu_read_unlock(); | |
9321954a | 948 | err_flow_free: |
a1c564be | 949 | ovs_flow_free(flow, false); |
e5cad958 BP |
950 | err_kfree_skb: |
951 | kfree_skb(packet); | |
952 | err: | |
d6569377 | 953 | return err; |
064af421 BP |
954 | } |
955 | ||
df2c07f4 | 956 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc TG |
957 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18) |
958 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, | |
959 | #else | |
960 | [OVS_PACKET_ATTR_PACKET] = { .minlen = ETH_HLEN }, | |
961 | #endif | |
df2c07f4 JP |
962 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
963 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
964 | }; |
965 | ||
966 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 967 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
968 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
969 | .policy = packet_policy, | |
df2c07f4 | 970 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
971 | } |
972 | }; | |
973 | ||
df2c07f4 | 974 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) |
064af421 | 975 | { |
fb93e9aa | 976 | struct flow_table *table; |
d6569377 | 977 | int i; |
f180c2e2 | 978 | |
fb93e9aa | 979 | table = rcu_dereference_check(dp->table, lockdep_ovsl_is_held()); |
850b6b3b | 980 | stats->n_flows = ovs_flow_tbl_count(table); |
064af421 | 981 | |
7257b535 | 982 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
d6569377 BP |
983 | for_each_possible_cpu(i) { |
984 | const struct dp_stats_percpu *percpu_stats; | |
985 | struct dp_stats_percpu local_stats; | |
821cb9fa | 986 | unsigned int start; |
44e05eca | 987 | |
d6569377 | 988 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 989 | |
d6569377 | 990 | do { |
821cb9fa | 991 | start = u64_stats_fetch_begin_bh(&percpu_stats->sync); |
d6569377 | 992 | local_stats = *percpu_stats; |
821cb9fa | 993 | } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); |
064af421 | 994 | |
d6569377 BP |
995 | stats->n_hit += local_stats.n_hit; |
996 | stats->n_missed += local_stats.n_missed; | |
997 | stats->n_lost += local_stats.n_lost; | |
998 | } | |
999 | } | |
064af421 | 1000 | |
df2c07f4 JP |
1001 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1002 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
1003 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1004 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 1005 | }; |
36956a7d | 1006 | |
37a1300c BP |
1007 | static struct genl_family dp_flow_genl_family = { |
1008 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1009 | .hdrsize = sizeof(struct ovs_header), |
1010 | .name = OVS_FLOW_FAMILY, | |
69685a88 | 1011 | .version = OVS_FLOW_VERSION, |
2a4999f3 PS |
1012 | .maxattr = OVS_FLOW_ATTR_MAX, |
1013 | SET_NETNSOK | |
14002a59 | 1014 | SET_PARALLEL_OPS |
37a1300c | 1015 | }; |
ed099e92 | 1016 | |
850b6b3b | 1017 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { |
df2c07f4 | 1018 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
1019 | }; |
1020 | ||
9b405f1a PS |
1021 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb); |
1022 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) | |
1023 | { | |
1024 | const struct nlattr *a; | |
1025 | struct nlattr *start; | |
1026 | int err = 0, rem; | |
1027 | ||
1028 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
1029 | if (!start) | |
1030 | return -EMSGSIZE; | |
1031 | ||
1032 | nla_for_each_nested(a, attr, rem) { | |
1033 | int type = nla_type(a); | |
1034 | struct nlattr *st_sample; | |
1035 | ||
1036 | switch (type) { | |
1037 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
1038 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, sizeof(u32), nla_data(a))) | |
1039 | return -EMSGSIZE; | |
1040 | break; | |
1041 | case OVS_SAMPLE_ATTR_ACTIONS: | |
1042 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
1043 | if (!st_sample) | |
1044 | return -EMSGSIZE; | |
1045 | err = actions_to_attr(nla_data(a), nla_len(a), skb); | |
1046 | if (err) | |
1047 | return err; | |
1048 | nla_nest_end(skb, st_sample); | |
1049 | break; | |
1050 | } | |
1051 | } | |
1052 | ||
1053 | nla_nest_end(skb, start); | |
1054 | return err; | |
1055 | } | |
1056 | ||
1057 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
1058 | { | |
1059 | const struct nlattr *ovs_key = nla_data(a); | |
1060 | int key_type = nla_type(ovs_key); | |
1061 | struct nlattr *start; | |
1062 | int err; | |
1063 | ||
1064 | switch (key_type) { | |
1065 | case OVS_KEY_ATTR_IPV4_TUNNEL: | |
1066 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); | |
1067 | if (!start) | |
1068 | return -EMSGSIZE; | |
1069 | ||
54cc3ec6 JG |
1070 | err = ovs_ipv4_tun_to_nlattr(skb, nla_data(ovs_key), |
1071 | nla_data(ovs_key)); | |
9b405f1a PS |
1072 | if (err) |
1073 | return err; | |
1074 | nla_nest_end(skb, start); | |
1075 | break; | |
1076 | default: | |
1077 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
1078 | return -EMSGSIZE; | |
1079 | break; | |
1080 | } | |
1081 | ||
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb) | |
1086 | { | |
1087 | const struct nlattr *a; | |
1088 | int rem, err; | |
1089 | ||
1090 | nla_for_each_attr(a, attr, len, rem) { | |
1091 | int type = nla_type(a); | |
1092 | ||
1093 | switch (type) { | |
1094 | case OVS_ACTION_ATTR_SET: | |
1095 | err = set_action_to_attr(a, skb); | |
1096 | if (err) | |
1097 | return err; | |
1098 | break; | |
1099 | ||
1100 | case OVS_ACTION_ATTR_SAMPLE: | |
1101 | err = sample_action_to_attr(a, skb); | |
1102 | if (err) | |
1103 | return err; | |
1104 | break; | |
1105 | default: | |
1106 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
1107 | return -EMSGSIZE; | |
1108 | break; | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | return 0; | |
1113 | } | |
1114 | ||
0afa2373 TG |
1115 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
1116 | { | |
1117 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
1118 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
a1c564be | 1119 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */ |
0afa2373 TG |
1120 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
1121 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
1122 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
1123 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
1124 | } | |
1125 | ||
cd2a59e9 | 1126 | /* Called with ovs_mutex. */ |
df2c07f4 | 1127 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
28aea917 | 1128 | struct sk_buff *skb, u32 portid, |
6455100f | 1129 | u32 seq, u32 flags, u8 cmd) |
d6569377 | 1130 | { |
37a1300c | 1131 | const int skb_orig_len = skb->len; |
9b405f1a | 1132 | struct nlattr *start; |
df2c07f4 JP |
1133 | struct ovs_flow_stats stats; |
1134 | struct ovs_header *ovs_header; | |
d6569377 BP |
1135 | struct nlattr *nla; |
1136 | unsigned long used; | |
1137 | u8 tcp_flags; | |
1138 | int err; | |
064af421 | 1139 | |
28aea917 | 1140 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
df2c07f4 | 1141 | if (!ovs_header) |
37a1300c | 1142 | return -EMSGSIZE; |
d6569377 | 1143 | |
99769a40 | 1144 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 1145 | |
a1c564be | 1146 | /* Fill flow key. */ |
df2c07f4 | 1147 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
1148 | if (!nla) |
1149 | goto nla_put_failure; | |
a1c564be AZ |
1150 | |
1151 | err = ovs_flow_to_nlattrs(&flow->unmasked_key, | |
1152 | &flow->unmasked_key, skb); | |
d6569377 | 1153 | if (err) |
37a1300c | 1154 | goto error; |
d6569377 BP |
1155 | nla_nest_end(skb, nla); |
1156 | ||
a1c564be AZ |
1157 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); |
1158 | if (!nla) | |
1159 | goto nla_put_failure; | |
1160 | ||
3d097064 | 1161 | err = ovs_flow_to_nlattrs(&flow->key, &flow->mask->key, skb); |
a1c564be AZ |
1162 | if (err) |
1163 | goto error; | |
1164 | ||
1165 | nla_nest_end(skb, nla); | |
1166 | ||
d6569377 BP |
1167 | spin_lock_bh(&flow->lock); |
1168 | used = flow->used; | |
1169 | stats.n_packets = flow->packet_count; | |
1170 | stats.n_bytes = flow->byte_count; | |
1171 | tcp_flags = flow->tcp_flags; | |
1172 | spin_unlock_bh(&flow->lock); | |
1173 | ||
c3cc8c03 DM |
1174 | if (used && |
1175 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
1176 | goto nla_put_failure; | |
d6569377 | 1177 | |
c3cc8c03 DM |
1178 | if (stats.n_packets && |
1179 | nla_put(skb, OVS_FLOW_ATTR_STATS, | |
1180 | sizeof(struct ovs_flow_stats), &stats)) | |
1181 | goto nla_put_failure; | |
d6569377 | 1182 | |
c3cc8c03 DM |
1183 | if (tcp_flags && |
1184 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags)) | |
1185 | goto nla_put_failure; | |
d6569377 | 1186 | |
df2c07f4 | 1187 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
1188 | * this is the first flow to be dumped into 'skb'. This is unusual for |
1189 | * Netlink but individual action lists can be longer than | |
1190 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
1191 | * The userspace caller can always fetch the actions separately if it | |
1192 | * really wants them. (Most userspace callers in fact don't care.) | |
1193 | * | |
1194 | * This can only fail for dump operations because the skb is always | |
1195 | * properly sized for single flows. | |
1196 | */ | |
9b405f1a | 1197 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 1198 | if (start) { |
f44ccce1 PS |
1199 | const struct sw_flow_actions *sf_acts; |
1200 | ||
1201 | sf_acts = rcu_dereference_check(flow->sf_acts, | |
1202 | lockdep_ovsl_is_held()); | |
1203 | ||
f6f481ee | 1204 | err = actions_to_attr(sf_acts->actions, sf_acts->actions_len, skb); |
0a25b039 BP |
1205 | if (!err) |
1206 | nla_nest_end(skb, start); | |
1207 | else { | |
1208 | if (skb_orig_len) | |
1209 | goto error; | |
1210 | ||
1211 | nla_nest_cancel(skb, start); | |
1212 | } | |
7aac03bd JG |
1213 | } else if (skb_orig_len) |
1214 | goto nla_put_failure; | |
37a1300c | 1215 | |
df2c07f4 | 1216 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1217 | |
1218 | nla_put_failure: | |
1219 | err = -EMSGSIZE; | |
37a1300c | 1220 | error: |
df2c07f4 | 1221 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 1222 | return err; |
44e05eca BP |
1223 | } |
1224 | ||
df2c07f4 | 1225 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) |
44e05eca | 1226 | { |
37a1300c | 1227 | const struct sw_flow_actions *sf_acts; |
d6569377 | 1228 | |
cd2a59e9 | 1229 | sf_acts = ovsl_dereference(flow->sf_acts); |
d6569377 | 1230 | |
0afa2373 | 1231 | return genlmsg_new(ovs_flow_cmd_msg_size(sf_acts), GFP_KERNEL); |
37a1300c | 1232 | } |
8d5ebd83 | 1233 | |
6455100f PS |
1234 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, |
1235 | struct datapath *dp, | |
28aea917 | 1236 | u32 portid, u32 seq, u8 cmd) |
37a1300c BP |
1237 | { |
1238 | struct sk_buff *skb; | |
1239 | int retval; | |
d6569377 | 1240 | |
df2c07f4 | 1241 | skb = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1242 | if (!skb) |
1243 | return ERR_PTR(-ENOMEM); | |
d6569377 | 1244 | |
28aea917 | 1245 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, portid, seq, 0, cmd); |
37a1300c | 1246 | BUG_ON(retval < 0); |
d6569377 | 1247 | return skb; |
064af421 BP |
1248 | } |
1249 | ||
df2c07f4 | 1250 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1251 | { |
37a1300c | 1252 | struct nlattr **a = info->attrs; |
df2c07f4 | 1253 | struct ovs_header *ovs_header = info->userhdr; |
529db635 | 1254 | struct sw_flow_key key, masked_key; |
a1c564be AZ |
1255 | struct sw_flow *flow = NULL; |
1256 | struct sw_flow_mask mask; | |
37a1300c | 1257 | struct sk_buff *reply; |
9c52546b | 1258 | struct datapath *dp; |
3544358a | 1259 | struct flow_table *table; |
9b405f1a | 1260 | struct sw_flow_actions *acts = NULL; |
a1c564be | 1261 | struct sw_flow_match match; |
bc4a05c6 | 1262 | int error; |
064af421 | 1263 | |
37a1300c BP |
1264 | /* Extract key. */ |
1265 | error = -EINVAL; | |
df2c07f4 | 1266 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1267 | goto error; |
a1c564be AZ |
1268 | |
1269 | ovs_match_init(&match, &key, &mask); | |
1270 | error = ovs_match_from_nlattrs(&match, | |
1271 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); | |
37a1300c BP |
1272 | if (error) |
1273 | goto error; | |
064af421 | 1274 | |
37a1300c | 1275 | /* Validate actions. */ |
df2c07f4 | 1276 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
9b405f1a PS |
1277 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
1278 | error = PTR_ERR(acts); | |
1279 | if (IS_ERR(acts)) | |
37a1300c | 1280 | goto error; |
9b405f1a | 1281 | |
529db635 JG |
1282 | ovs_flow_key_mask(&masked_key, &key, &mask); |
1283 | error = validate_and_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], | |
1284 | &masked_key, 0, &acts); | |
1285 | if (error) { | |
1286 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
9b405f1a | 1287 | goto err_kfree; |
529db635 | 1288 | } |
df2c07f4 | 1289 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
1290 | error = -EINVAL; |
1291 | goto error; | |
1292 | } | |
1293 | ||
cd2a59e9 | 1294 | ovs_lock(); |
2a4999f3 | 1295 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
d6569377 | 1296 | error = -ENODEV; |
9c52546b | 1297 | if (!dp) |
cd2a59e9 | 1298 | goto err_unlock_ovs; |
704a1e09 | 1299 | |
cd2a59e9 | 1300 | table = ovsl_dereference(dp->table); |
a1c564be AZ |
1301 | |
1302 | /* Check if this is a duplicate flow */ | |
1303 | flow = ovs_flow_lookup(table, &key); | |
3544358a | 1304 | if (!flow) { |
a1c564be | 1305 | struct sw_flow_mask *mask_p; |
d6569377 BP |
1306 | /* Bail out if we're not allowed to create a new flow. */ |
1307 | error = -ENOENT; | |
df2c07f4 | 1308 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
cd2a59e9 | 1309 | goto err_unlock_ovs; |
d6569377 BP |
1310 | |
1311 | /* Expand table, if necessary, to make room. */ | |
850b6b3b | 1312 | if (ovs_flow_tbl_need_to_expand(table)) { |
3544358a PS |
1313 | struct flow_table *new_table; |
1314 | ||
850b6b3b | 1315 | new_table = ovs_flow_tbl_expand(table); |
3544358a PS |
1316 | if (!IS_ERR(new_table)) { |
1317 | rcu_assign_pointer(dp->table, new_table); | |
a1c564be | 1318 | ovs_flow_tbl_destroy(table, true); |
cd2a59e9 | 1319 | table = ovsl_dereference(dp->table); |
3544358a | 1320 | } |
d6569377 BP |
1321 | } |
1322 | ||
1323 | /* Allocate flow. */ | |
850b6b3b | 1324 | flow = ovs_flow_alloc(); |
d6569377 BP |
1325 | if (IS_ERR(flow)) { |
1326 | error = PTR_ERR(flow); | |
cd2a59e9 | 1327 | goto err_unlock_ovs; |
d6569377 | 1328 | } |
d6569377 BP |
1329 | clear_stats(flow); |
1330 | ||
529db635 JG |
1331 | flow->key = masked_key; |
1332 | flow->unmasked_key = key; | |
1333 | ||
a1c564be AZ |
1334 | /* Make sure mask is unique in the system */ |
1335 | mask_p = ovs_sw_flow_mask_find(table, &mask); | |
1336 | if (!mask_p) { | |
1337 | /* Allocate a new mask if none exsits. */ | |
1338 | mask_p = ovs_sw_flow_mask_alloc(); | |
1339 | if (!mask_p) | |
1340 | goto err_flow_free; | |
1341 | mask_p->key = mask.key; | |
1342 | mask_p->range = mask.range; | |
1343 | ovs_sw_flow_mask_insert(table, mask_p); | |
1344 | } | |
1345 | ||
1346 | ovs_sw_flow_mask_add_ref(mask_p); | |
3d097064 | 1347 | flow->mask = mask_p; |
d6569377 BP |
1348 | rcu_assign_pointer(flow->sf_acts, acts); |
1349 | ||
d6569377 | 1350 | /* Put flow in bucket. */ |
529db635 | 1351 | ovs_flow_insert(table, flow); |
37a1300c | 1352 | |
28aea917 | 1353 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
a1c564be | 1354 | info->snd_seq, OVS_FLOW_CMD_NEW); |
d6569377 BP |
1355 | } else { |
1356 | /* We found a matching flow. */ | |
1357 | struct sw_flow_actions *old_acts; | |
1358 | ||
1359 | /* Bail out if we're not allowed to modify an existing flow. | |
1360 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1361 | * because Generic Netlink treats the latter as a dump | |
1362 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1363 | * gets fixed. | |
1364 | */ | |
1365 | error = -EEXIST; | |
df2c07f4 | 1366 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c | 1367 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
cd2a59e9 | 1368 | goto err_unlock_ovs; |
d6569377 | 1369 | |
b21e5b6a AZ |
1370 | /* The unmasked key has to be the same for flow updates. */ |
1371 | error = -EINVAL; | |
1b936472 AZ |
1372 | if (!ovs_flow_cmp_unmasked_key(flow, &key, match.range.end)) { |
1373 | OVS_NLERR("Flow modification message rejected, unmasked key does not match.\n"); | |
b21e5b6a | 1374 | goto err_unlock_ovs; |
1b936472 | 1375 | } |
b21e5b6a | 1376 | |
d6569377 | 1377 | /* Update actions. */ |
cd2a59e9 | 1378 | old_acts = ovsl_dereference(flow->sf_acts); |
9b405f1a PS |
1379 | rcu_assign_pointer(flow->sf_acts, acts); |
1380 | ovs_flow_deferred_free_acts(old_acts); | |
d6569377 | 1381 | |
28aea917 | 1382 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f | 1383 | info->snd_seq, OVS_FLOW_CMD_NEW); |
d6569377 BP |
1384 | |
1385 | /* Clear stats. */ | |
df2c07f4 | 1386 | if (a[OVS_FLOW_ATTR_CLEAR]) { |
d6569377 BP |
1387 | spin_lock_bh(&flow->lock); |
1388 | clear_stats(flow); | |
1389 | spin_unlock_bh(&flow->lock); | |
1390 | } | |
9c52546b | 1391 | } |
cd2a59e9 | 1392 | ovs_unlock(); |
37a1300c BP |
1393 | |
1394 | if (!IS_ERR(reply)) | |
e297c6b7 | 1395 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
37a1300c | 1396 | else |
2a4999f3 PS |
1397 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
1398 | ovs_dp_flow_multicast_group.id, PTR_ERR(reply)); | |
d6569377 | 1399 | return 0; |
704a1e09 | 1400 | |
a1c564be AZ |
1401 | err_flow_free: |
1402 | ovs_flow_free(flow, false); | |
cd2a59e9 PS |
1403 | err_unlock_ovs: |
1404 | ovs_unlock(); | |
9b405f1a | 1405 | err_kfree: |
ba400435 | 1406 | kfree(acts); |
37a1300c | 1407 | error: |
9c52546b | 1408 | return error; |
704a1e09 BP |
1409 | } |
1410 | ||
df2c07f4 | 1411 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1412 | { |
37a1300c | 1413 | struct nlattr **a = info->attrs; |
df2c07f4 | 1414 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1415 | struct sw_flow_key key; |
37a1300c | 1416 | struct sk_buff *reply; |
704a1e09 | 1417 | struct sw_flow *flow; |
9c52546b | 1418 | struct datapath *dp; |
3544358a | 1419 | struct flow_table *table; |
a1c564be | 1420 | struct sw_flow_match match; |
9c52546b | 1421 | int err; |
704a1e09 | 1422 | |
1b936472 AZ |
1423 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1424 | OVS_NLERR("Flow get message rejected, Key attribute missing.\n"); | |
37a1300c | 1425 | return -EINVAL; |
1b936472 | 1426 | } |
a1c564be AZ |
1427 | |
1428 | ovs_match_init(&match, &key, NULL); | |
1429 | err = ovs_match_from_nlattrs(&match, a[OVS_FLOW_ATTR_KEY], NULL); | |
37a1300c BP |
1430 | if (err) |
1431 | return err; | |
704a1e09 | 1432 | |
cd2a59e9 | 1433 | ovs_lock(); |
2a4999f3 | 1434 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1435 | if (!dp) { |
1436 | err = -ENODEV; | |
1437 | goto unlock; | |
1438 | } | |
704a1e09 | 1439 | |
cd2a59e9 | 1440 | table = ovsl_dereference(dp->table); |
a1c564be | 1441 | flow = ovs_flow_lookup_unmasked_key(table, &match); |
cd2a59e9 PS |
1442 | if (!flow) { |
1443 | err = -ENOENT; | |
1444 | goto unlock; | |
1445 | } | |
d6569377 | 1446 | |
28aea917 | 1447 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f | 1448 | info->snd_seq, OVS_FLOW_CMD_NEW); |
cd2a59e9 PS |
1449 | if (IS_ERR(reply)) { |
1450 | err = PTR_ERR(reply); | |
1451 | goto unlock; | |
1452 | } | |
36956a7d | 1453 | |
cd2a59e9 | 1454 | ovs_unlock(); |
37a1300c | 1455 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1456 | unlock: |
1457 | ovs_unlock(); | |
1458 | return err; | |
d6569377 | 1459 | } |
9c52546b | 1460 | |
df2c07f4 | 1461 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1462 | { |
37a1300c | 1463 | struct nlattr **a = info->attrs; |
df2c07f4 | 1464 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1465 | struct sw_flow_key key; |
37a1300c | 1466 | struct sk_buff *reply; |
d6569377 | 1467 | struct sw_flow *flow; |
d6569377 | 1468 | struct datapath *dp; |
3544358a | 1469 | struct flow_table *table; |
a1c564be | 1470 | struct sw_flow_match match; |
d6569377 | 1471 | int err; |
36956a7d | 1472 | |
cd2a59e9 | 1473 | ovs_lock(); |
2a4999f3 | 1474 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1475 | if (!dp) { |
1476 | err = -ENODEV; | |
1477 | goto unlock; | |
1478 | } | |
2a4999f3 | 1479 | |
cd2a59e9 PS |
1480 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1481 | err = flush_flows(dp); | |
1482 | goto unlock; | |
1483 | } | |
a1c564be AZ |
1484 | |
1485 | ovs_match_init(&match, &key, NULL); | |
1486 | err = ovs_match_from_nlattrs(&match, a[OVS_FLOW_ATTR_KEY], NULL); | |
37a1300c | 1487 | if (err) |
cd2a59e9 | 1488 | goto unlock; |
d6569377 | 1489 | |
cd2a59e9 | 1490 | table = ovsl_dereference(dp->table); |
a1c564be | 1491 | flow = ovs_flow_lookup_unmasked_key(table, &match); |
cd2a59e9 PS |
1492 | if (!flow) { |
1493 | err = -ENOENT; | |
1494 | goto unlock; | |
1495 | } | |
d6569377 | 1496 | |
df2c07f4 | 1497 | reply = ovs_flow_cmd_alloc_info(flow); |
cd2a59e9 PS |
1498 | if (!reply) { |
1499 | err = -ENOMEM; | |
1500 | goto unlock; | |
1501 | } | |
37a1300c | 1502 | |
a1c564be | 1503 | ovs_flow_remove(table, flow); |
37a1300c | 1504 | |
28aea917 | 1505 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid, |
df2c07f4 | 1506 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); |
37a1300c BP |
1507 | BUG_ON(err < 0); |
1508 | ||
a1c564be | 1509 | ovs_flow_free(flow, true); |
cd2a59e9 | 1510 | ovs_unlock(); |
37a1300c | 1511 | |
e297c6b7 | 1512 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
37a1300c | 1513 | return 0; |
cd2a59e9 PS |
1514 | unlock: |
1515 | ovs_unlock(); | |
1516 | return err; | |
37a1300c BP |
1517 | } |
1518 | ||
df2c07f4 | 1519 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1520 | { |
df2c07f4 | 1521 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
37a1300c | 1522 | struct datapath *dp; |
20d035b2 | 1523 | struct flow_table *table; |
37a1300c | 1524 | |
f44ccce1 | 1525 | rcu_read_lock(); |
2a4999f3 | 1526 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 1527 | if (!dp) { |
f44ccce1 | 1528 | rcu_read_unlock(); |
37a1300c | 1529 | return -ENODEV; |
cd2a59e9 | 1530 | } |
37a1300c | 1531 | |
f44ccce1 | 1532 | table = rcu_dereference(dp->table); |
37a1300c | 1533 | for (;;) { |
37a1300c BP |
1534 | struct sw_flow *flow; |
1535 | u32 bucket, obj; | |
1536 | ||
1537 | bucket = cb->args[0]; | |
1538 | obj = cb->args[1]; | |
a1c564be | 1539 | flow = ovs_flow_dump_next(table, &bucket, &obj); |
3544358a | 1540 | if (!flow) |
37a1300c BP |
1541 | break; |
1542 | ||
6455100f | 1543 | if (ovs_flow_cmd_fill_info(flow, dp, skb, |
28aea917 | 1544 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1545 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1546 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1547 | break; |
1548 | ||
1549 | cb->args[0] = bucket; | |
1550 | cb->args[1] = obj; | |
1551 | } | |
f44ccce1 | 1552 | rcu_read_unlock(); |
37a1300c | 1553 | return skb->len; |
704a1e09 BP |
1554 | } |
1555 | ||
37a1300c | 1556 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1557 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1558 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1559 | .policy = flow_policy, | |
df2c07f4 | 1560 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1561 | }, |
df2c07f4 | 1562 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1563 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1564 | .policy = flow_policy, | |
df2c07f4 | 1565 | .doit = ovs_flow_cmd_del |
37a1300c | 1566 | }, |
df2c07f4 | 1567 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1568 | .flags = 0, /* OK for unprivileged users. */ |
1569 | .policy = flow_policy, | |
df2c07f4 JP |
1570 | .doit = ovs_flow_cmd_get, |
1571 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1572 | }, |
df2c07f4 | 1573 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1574 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1575 | .policy = flow_policy, | |
df2c07f4 | 1576 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1577 | }, |
1578 | }; | |
1579 | ||
df2c07f4 | 1580 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
aaff4b55 | 1581 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1582 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
aaff4b55 | 1583 | #endif |
b063d9f0 | 1584 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
d6569377 BP |
1585 | }; |
1586 | ||
aaff4b55 BP |
1587 | static struct genl_family dp_datapath_genl_family = { |
1588 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1589 | .hdrsize = sizeof(struct ovs_header), |
1590 | .name = OVS_DATAPATH_FAMILY, | |
69685a88 | 1591 | .version = OVS_DATAPATH_VERSION, |
2a4999f3 PS |
1592 | .maxattr = OVS_DP_ATTR_MAX, |
1593 | SET_NETNSOK | |
14002a59 | 1594 | SET_PARALLEL_OPS |
aaff4b55 BP |
1595 | }; |
1596 | ||
850b6b3b | 1597 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
df2c07f4 | 1598 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1599 | }; |
1600 | ||
0afa2373 TG |
1601 | static size_t ovs_dp_cmd_msg_size(void) |
1602 | { | |
1603 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1604 | ||
1605 | msgsize += nla_total_size(IFNAMSIZ); | |
1606 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1607 | ||
1608 | return msgsize; | |
1609 | } | |
1610 | ||
df2c07f4 | 1611 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1612 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1613 | { |
df2c07f4 | 1614 | struct ovs_header *ovs_header; |
e926dfe3 | 1615 | struct ovs_dp_stats dp_stats; |
064af421 BP |
1616 | int err; |
1617 | ||
28aea917 | 1618 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1619 | flags, cmd); |
df2c07f4 | 1620 | if (!ovs_header) |
aaff4b55 | 1621 | goto error; |
064af421 | 1622 | |
b063d9f0 | 1623 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1624 | |
d6569377 | 1625 | rcu_read_lock(); |
850b6b3b | 1626 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
d6569377 | 1627 | rcu_read_unlock(); |
064af421 | 1628 | if (err) |
d6569377 | 1629 | goto nla_put_failure; |
064af421 | 1630 | |
e926dfe3 | 1631 | get_dp_stats(dp, &dp_stats); |
c3cc8c03 DM |
1632 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats)) |
1633 | goto nla_put_failure; | |
d6569377 | 1634 | |
df2c07f4 | 1635 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1636 | |
1637 | nla_put_failure: | |
df2c07f4 | 1638 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1639 | error: |
1640 | return -EMSGSIZE; | |
d6569377 BP |
1641 | } |
1642 | ||
28aea917 | 1643 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 portid, |
aaff4b55 | 1644 | u32 seq, u8 cmd) |
d6569377 | 1645 | { |
d6569377 | 1646 | struct sk_buff *skb; |
aaff4b55 | 1647 | int retval; |
d6569377 | 1648 | |
0afa2373 | 1649 | skb = genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
064af421 | 1650 | if (!skb) |
d6569377 | 1651 | return ERR_PTR(-ENOMEM); |
659586ef | 1652 | |
28aea917 | 1653 | retval = ovs_dp_cmd_fill_info(dp, skb, portid, seq, 0, cmd); |
aaff4b55 BP |
1654 | if (retval < 0) { |
1655 | kfree_skb(skb); | |
1656 | return ERR_PTR(retval); | |
1657 | } | |
1658 | return skb; | |
1659 | } | |
9dca7bd5 | 1660 | |
df2c07f4 | 1661 | static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
aaff4b55 | 1662 | { |
df2c07f4 | 1663 | return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1); |
d6569377 BP |
1664 | } |
1665 | ||
cd2a59e9 | 1666 | /* Called with ovs_mutex. */ |
2a4999f3 PS |
1667 | static struct datapath *lookup_datapath(struct net *net, |
1668 | struct ovs_header *ovs_header, | |
6455100f | 1669 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1670 | { |
254f2dc8 BP |
1671 | struct datapath *dp; |
1672 | ||
df2c07f4 | 1673 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1674 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1675 | else { |
d6569377 | 1676 | struct vport *vport; |
d6569377 | 1677 | |
057dd6d2 | 1678 | rcu_read_lock(); |
2a4999f3 | 1679 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1680 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
057dd6d2 | 1681 | rcu_read_unlock(); |
d6569377 | 1682 | } |
254f2dc8 | 1683 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1684 | } |
1685 | ||
df2c07f4 | 1686 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1687 | { |
aaff4b55 | 1688 | struct nlattr **a = info->attrs; |
d6569377 | 1689 | struct vport_parms parms; |
aaff4b55 | 1690 | struct sk_buff *reply; |
d6569377 BP |
1691 | struct datapath *dp; |
1692 | struct vport *vport; | |
2a4999f3 | 1693 | struct ovs_net *ovs_net; |
95b1d73a | 1694 | int err, i; |
d6569377 | 1695 | |
d6569377 | 1696 | err = -EINVAL; |
ea36840f | 1697 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1698 | goto err; |
1699 | ||
df2c07f4 | 1700 | err = ovs_dp_cmd_validate(a); |
aaff4b55 BP |
1701 | if (err) |
1702 | goto err; | |
d6569377 | 1703 | |
cd2a59e9 | 1704 | ovs_lock(); |
d6569377 | 1705 | |
d6569377 BP |
1706 | err = -ENOMEM; |
1707 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1708 | if (dp == NULL) | |
cd2a59e9 | 1709 | goto err_unlock_ovs; |
2a4999f3 | 1710 | |
0ceaa66c JG |
1711 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1712 | ||
d6569377 BP |
1713 | /* Allocate table. */ |
1714 | err = -ENOMEM; | |
850b6b3b | 1715 | rcu_assign_pointer(dp->table, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS)); |
d6569377 BP |
1716 | if (!dp->table) |
1717 | goto err_free_dp; | |
1718 | ||
99769a40 JG |
1719 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); |
1720 | if (!dp->stats_percpu) { | |
1721 | err = -ENOMEM; | |
1722 | goto err_destroy_table; | |
1723 | } | |
1724 | ||
95b1d73a PS |
1725 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1726 | GFP_KERNEL); | |
1727 | if (!dp->ports) { | |
1728 | err = -ENOMEM; | |
1729 | goto err_destroy_percpu; | |
1730 | } | |
1731 | ||
1732 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1733 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1734 | ||
d6569377 | 1735 | /* Set up our datapath device. */ |
df2c07f4 JP |
1736 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1737 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1738 | parms.options = NULL; |
1739 | parms.dp = dp; | |
df2c07f4 | 1740 | parms.port_no = OVSP_LOCAL; |
28aea917 | 1741 | parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
b063d9f0 | 1742 | |
d6569377 BP |
1743 | vport = new_vport(&parms); |
1744 | if (IS_ERR(vport)) { | |
1745 | err = PTR_ERR(vport); | |
1746 | if (err == -EBUSY) | |
1747 | err = -EEXIST; | |
1748 | ||
95b1d73a | 1749 | goto err_destroy_ports_array; |
d6569377 | 1750 | } |
d6569377 | 1751 | |
28aea917 | 1752 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1753 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1754 | err = PTR_ERR(reply); |
1755 | if (IS_ERR(reply)) | |
1756 | goto err_destroy_local_port; | |
1757 | ||
2a4999f3 | 1758 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1759 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
d6569377 | 1760 | |
cd2a59e9 | 1761 | ovs_unlock(); |
d6569377 | 1762 | |
e297c6b7 | 1763 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
d6569377 BP |
1764 | return 0; |
1765 | ||
1766 | err_destroy_local_port: | |
cd2a59e9 | 1767 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
95b1d73a PS |
1768 | err_destroy_ports_array: |
1769 | kfree(dp->ports); | |
99769a40 JG |
1770 | err_destroy_percpu: |
1771 | free_percpu(dp->stats_percpu); | |
d6569377 | 1772 | err_destroy_table: |
a1c564be | 1773 | ovs_flow_tbl_destroy(ovsl_dereference(dp->table), false); |
d6569377 | 1774 | err_free_dp: |
0ceaa66c | 1775 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1776 | kfree(dp); |
cd2a59e9 PS |
1777 | err_unlock_ovs: |
1778 | ovs_unlock(); | |
d6569377 | 1779 | err: |
064af421 BP |
1780 | return err; |
1781 | } | |
1782 | ||
cd2a59e9 | 1783 | /* Called with ovs_mutex. */ |
2a4999f3 | 1784 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1785 | { |
95b1d73a | 1786 | int i; |
44e05eca | 1787 | |
95b1d73a PS |
1788 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1789 | struct vport *vport; | |
f8dfbcb7 | 1790 | struct hlist_node *n; |
95b1d73a | 1791 | |
f8dfbcb7 | 1792 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1793 | if (vport->port_no != OVSP_LOCAL) |
1794 | ovs_dp_detach_port(vport); | |
1795 | } | |
ed099e92 | 1796 | |
fb93e9aa | 1797 | list_del_rcu(&dp->list_node); |
ed099e92 | 1798 | |
cd2a59e9 PS |
1799 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
1800 | * all port in datapath are destroyed first before freeing datapath. | |
1801 | */ | |
1802 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); | |
99620d2c | 1803 | |
ed099e92 | 1804 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1805 | } |
1806 | ||
1807 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1808 | { | |
1809 | struct sk_buff *reply; | |
1810 | struct datapath *dp; | |
1811 | int err; | |
1812 | ||
1813 | err = ovs_dp_cmd_validate(info->attrs); | |
1814 | if (err) | |
1815 | return err; | |
1816 | ||
cd2a59e9 | 1817 | ovs_lock(); |
2a4999f3 PS |
1818 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1819 | err = PTR_ERR(dp); | |
1820 | if (IS_ERR(dp)) | |
cd2a59e9 | 1821 | goto unlock; |
2a4999f3 | 1822 | |
28aea917 | 1823 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
2a4999f3 PS |
1824 | info->snd_seq, OVS_DP_CMD_DEL); |
1825 | err = PTR_ERR(reply); | |
1826 | if (IS_ERR(reply)) | |
cd2a59e9 | 1827 | goto unlock; |
2a4999f3 PS |
1828 | |
1829 | __dp_destroy(dp); | |
cd2a59e9 | 1830 | ovs_unlock(); |
ed099e92 | 1831 | |
e297c6b7 | 1832 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
99620d2c JG |
1833 | |
1834 | return 0; | |
cd2a59e9 PS |
1835 | unlock: |
1836 | ovs_unlock(); | |
1837 | return err; | |
44e05eca BP |
1838 | } |
1839 | ||
df2c07f4 | 1840 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1841 | { |
aaff4b55 | 1842 | struct sk_buff *reply; |
d6569377 | 1843 | struct datapath *dp; |
d6569377 | 1844 | int err; |
064af421 | 1845 | |
df2c07f4 | 1846 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1847 | if (err) |
1848 | return err; | |
38c6ecbc | 1849 | |
cd2a59e9 | 1850 | ovs_lock(); |
2a4999f3 | 1851 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1852 | err = PTR_ERR(dp); |
d6569377 | 1853 | if (IS_ERR(dp)) |
cd2a59e9 | 1854 | goto unlock; |
38c6ecbc | 1855 | |
28aea917 | 1856 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1857 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1858 | if (IS_ERR(reply)) { |
1859 | err = PTR_ERR(reply); | |
2a4999f3 | 1860 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
850b6b3b | 1861 | ovs_dp_datapath_multicast_group.id, err); |
cd2a59e9 PS |
1862 | err = 0; |
1863 | goto unlock; | |
aaff4b55 BP |
1864 | } |
1865 | ||
cd2a59e9 | 1866 | ovs_unlock(); |
e297c6b7 | 1867 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
850b6b3b | 1868 | |
aaff4b55 | 1869 | return 0; |
cd2a59e9 PS |
1870 | unlock: |
1871 | ovs_unlock(); | |
1872 | return err; | |
064af421 BP |
1873 | } |
1874 | ||
df2c07f4 | 1875 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1876 | { |
aaff4b55 | 1877 | struct sk_buff *reply; |
d6569377 | 1878 | struct datapath *dp; |
d6569377 | 1879 | int err; |
1dcf111b | 1880 | |
df2c07f4 | 1881 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1882 | if (err) |
1883 | return err; | |
1dcf111b | 1884 | |
cd2a59e9 | 1885 | ovs_lock(); |
2a4999f3 | 1886 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1887 | if (IS_ERR(dp)) { |
1888 | err = PTR_ERR(dp); | |
1889 | goto unlock; | |
1890 | } | |
1dcf111b | 1891 | |
28aea917 | 1892 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1893 | info->snd_seq, OVS_DP_CMD_NEW); |
cd2a59e9 PS |
1894 | if (IS_ERR(reply)) { |
1895 | err = PTR_ERR(reply); | |
1896 | goto unlock; | |
1897 | } | |
aaff4b55 | 1898 | |
cd2a59e9 | 1899 | ovs_unlock(); |
aaff4b55 | 1900 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1901 | |
1902 | unlock: | |
1903 | ovs_unlock(); | |
1904 | return err; | |
1dcf111b JP |
1905 | } |
1906 | ||
df2c07f4 | 1907 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1908 | { |
2a4999f3 | 1909 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1910 | struct datapath *dp; |
1911 | int skip = cb->args[0]; | |
1912 | int i = 0; | |
a7786963 | 1913 | |
fb93e9aa PS |
1914 | rcu_read_lock(); |
1915 | list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1916 | if (i >= skip && |
28aea917 | 1917 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1918 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1919 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1920 | break; |
254f2dc8 | 1921 | i++; |
a7786963 | 1922 | } |
fb93e9aa | 1923 | rcu_read_unlock(); |
aaff4b55 | 1924 | |
254f2dc8 BP |
1925 | cb->args[0] = i; |
1926 | ||
aaff4b55 | 1927 | return skb->len; |
c19e6535 BP |
1928 | } |
1929 | ||
aaff4b55 | 1930 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1931 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1932 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1933 | .policy = datapath_policy, | |
df2c07f4 | 1934 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1935 | }, |
df2c07f4 | 1936 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1937 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1938 | .policy = datapath_policy, | |
df2c07f4 | 1939 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1940 | }, |
df2c07f4 | 1941 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1942 | .flags = 0, /* OK for unprivileged users. */ |
1943 | .policy = datapath_policy, | |
df2c07f4 JP |
1944 | .doit = ovs_dp_cmd_get, |
1945 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1946 | }, |
df2c07f4 | 1947 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1948 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1949 | .policy = datapath_policy, | |
df2c07f4 | 1950 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1951 | }, |
1952 | }; | |
1953 | ||
df2c07f4 | 1954 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
f0fef760 | 1955 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1956 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1957 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
f0fef760 | 1958 | #else |
f613a0d7 | 1959 | [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) }, |
f0fef760 | 1960 | #endif |
d48c88ec JG |
1961 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1962 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1963 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1964 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1965 | }; |
1966 | ||
f0fef760 BP |
1967 | static struct genl_family dp_vport_genl_family = { |
1968 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1969 | .hdrsize = sizeof(struct ovs_header), |
1970 | .name = OVS_VPORT_FAMILY, | |
69685a88 | 1971 | .version = OVS_VPORT_VERSION, |
2a4999f3 PS |
1972 | .maxattr = OVS_VPORT_ATTR_MAX, |
1973 | SET_NETNSOK | |
14002a59 | 1974 | SET_PARALLEL_OPS |
f0fef760 BP |
1975 | }; |
1976 | ||
850b6b3b | 1977 | struct genl_multicast_group ovs_dp_vport_multicast_group = { |
df2c07f4 | 1978 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1979 | }; |
1980 | ||
cd2a59e9 | 1981 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1982 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1983 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1984 | { |
df2c07f4 | 1985 | struct ovs_header *ovs_header; |
e926dfe3 | 1986 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1987 | int err; |
1988 | ||
28aea917 | 1989 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1990 | flags, cmd); |
df2c07f4 | 1991 | if (!ovs_header) |
f0fef760 | 1992 | return -EMSGSIZE; |
c19e6535 | 1993 | |
99769a40 | 1994 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1995 | |
c3cc8c03 DM |
1996 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1997 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
1998 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || | |
28aea917 | 1999 | nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid)) |
c3cc8c03 | 2000 | goto nla_put_failure; |
c19e6535 | 2001 | |
850b6b3b | 2002 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
2003 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
2004 | &vport_stats)) | |
2005 | goto nla_put_failure; | |
c19e6535 | 2006 | |
850b6b3b | 2007 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
2008 | if (err == -EMSGSIZE) |
2009 | goto error; | |
c19e6535 | 2010 | |
df2c07f4 | 2011 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
2012 | |
2013 | nla_put_failure: | |
2014 | err = -EMSGSIZE; | |
f0fef760 | 2015 | error: |
df2c07f4 | 2016 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 2017 | return err; |
064af421 BP |
2018 | } |
2019 | ||
cd2a59e9 | 2020 | /* Called with ovs_mutex or RCU read lock. */ |
28aea917 | 2021 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 2022 | u32 seq, u8 cmd) |
064af421 | 2023 | { |
c19e6535 | 2024 | struct sk_buff *skb; |
f0fef760 | 2025 | int retval; |
c19e6535 | 2026 | |
f0fef760 | 2027 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
2028 | if (!skb) |
2029 | return ERR_PTR(-ENOMEM); | |
2030 | ||
28aea917 | 2031 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
2032 | BUG_ON(retval < 0); |
2033 | ||
c19e6535 | 2034 | return skb; |
f0fef760 | 2035 | } |
c19e6535 | 2036 | |
df2c07f4 | 2037 | static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
f0fef760 | 2038 | { |
df2c07f4 | 2039 | return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1); |
c19e6535 | 2040 | } |
51d4d598 | 2041 | |
cd2a59e9 | 2042 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 PS |
2043 | static struct vport *lookup_vport(struct net *net, |
2044 | struct ovs_header *ovs_header, | |
df2c07f4 | 2045 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
2046 | { |
2047 | struct datapath *dp; | |
2048 | struct vport *vport; | |
2049 | ||
df2c07f4 | 2050 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 2051 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 2052 | if (!vport) |
c19e6535 | 2053 | return ERR_PTR(-ENODEV); |
24ce832d BP |
2054 | if (ovs_header->dp_ifindex && |
2055 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
2056 | return ERR_PTR(-ENODEV); | |
c19e6535 | 2057 | return vport; |
df2c07f4 JP |
2058 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
2059 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
2060 | |
2061 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 2062 | return ERR_PTR(-EFBIG); |
c19e6535 | 2063 | |
2a4999f3 | 2064 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
2065 | if (!dp) |
2066 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 2067 | |
cd2a59e9 | 2068 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 2069 | if (!vport) |
17535c57 | 2070 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
2071 | return vport; |
2072 | } else | |
2073 | return ERR_PTR(-EINVAL); | |
064af421 BP |
2074 | } |
2075 | ||
df2c07f4 | 2076 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 2077 | { |
f0fef760 | 2078 | struct nlattr **a = info->attrs; |
df2c07f4 | 2079 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 2080 | struct vport_parms parms; |
ed099e92 | 2081 | struct sk_buff *reply; |
c19e6535 | 2082 | struct vport *vport; |
c19e6535 | 2083 | struct datapath *dp; |
b0ec0f27 | 2084 | u32 port_no; |
c19e6535 | 2085 | int err; |
b0ec0f27 | 2086 | |
c19e6535 | 2087 | err = -EINVAL; |
ea36840f BP |
2088 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
2089 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
f0fef760 BP |
2090 | goto exit; |
2091 | ||
df2c07f4 | 2092 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
2093 | if (err) |
2094 | goto exit; | |
51d4d598 | 2095 | |
cd2a59e9 | 2096 | ovs_lock(); |
2a4999f3 | 2097 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
2098 | err = -ENODEV; |
2099 | if (!dp) | |
ed099e92 | 2100 | goto exit_unlock; |
c19e6535 | 2101 | |
df2c07f4 JP |
2102 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
2103 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
2104 | |
2105 | err = -EFBIG; | |
2106 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 2107 | goto exit_unlock; |
c19e6535 | 2108 | |
cd2a59e9 | 2109 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2110 | err = -EBUSY; |
2111 | if (vport) | |
ed099e92 | 2112 | goto exit_unlock; |
c19e6535 BP |
2113 | } else { |
2114 | for (port_no = 1; ; port_no++) { | |
2115 | if (port_no >= DP_MAX_PORTS) { | |
2116 | err = -EFBIG; | |
ed099e92 | 2117 | goto exit_unlock; |
c19e6535 | 2118 | } |
cd2a59e9 | 2119 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2120 | if (!vport) |
2121 | break; | |
51d4d598 | 2122 | } |
064af421 | 2123 | } |
b0ec0f27 | 2124 | |
df2c07f4 JP |
2125 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
2126 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2127 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
2128 | parms.dp = dp; |
2129 | parms.port_no = port_no; | |
28aea917 | 2130 | parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 BP |
2131 | |
2132 | vport = new_vport(&parms); | |
2133 | err = PTR_ERR(vport); | |
2134 | if (IS_ERR(vport)) | |
ed099e92 | 2135 | goto exit_unlock; |
c19e6535 | 2136 | |
faef6d2d | 2137 | err = 0; |
1fc7083d JG |
2138 | if (a[OVS_VPORT_ATTR_STATS]) |
2139 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
2140 | ||
2141 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, | |
2142 | OVS_VPORT_CMD_NEW); | |
2143 | if (IS_ERR(reply)) { | |
2144 | err = PTR_ERR(reply); | |
850b6b3b | 2145 | ovs_dp_detach_port(vport); |
ed099e92 | 2146 | goto exit_unlock; |
c19e6535 | 2147 | } |
e297c6b7 TG |
2148 | |
2149 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); | |
c19e6535 | 2150 | |
ed099e92 | 2151 | exit_unlock: |
cd2a59e9 | 2152 | ovs_unlock(); |
c19e6535 BP |
2153 | exit: |
2154 | return err; | |
44e05eca BP |
2155 | } |
2156 | ||
df2c07f4 | 2157 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 2158 | { |
f0fef760 BP |
2159 | struct nlattr **a = info->attrs; |
2160 | struct sk_buff *reply; | |
c19e6535 | 2161 | struct vport *vport; |
c19e6535 | 2162 | int err; |
44e05eca | 2163 | |
df2c07f4 | 2164 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 2165 | if (err) |
c19e6535 BP |
2166 | goto exit; |
2167 | ||
cd2a59e9 | 2168 | ovs_lock(); |
2a4999f3 | 2169 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
2170 | err = PTR_ERR(vport); |
2171 | if (IS_ERR(vport)) | |
f0fef760 | 2172 | goto exit_unlock; |
44e05eca | 2173 | |
6455100f | 2174 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 2175 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 2176 | err = -EINVAL; |
17ec1d04 JG |
2177 | goto exit_unlock; |
2178 | } | |
6455100f | 2179 | |
c25ea534 JG |
2180 | reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
2181 | if (!reply) { | |
2182 | err = -ENOMEM; | |
2183 | goto exit_unlock; | |
2184 | } | |
2185 | ||
17ec1d04 | 2186 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 2187 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 JG |
2188 | if (err) |
2189 | goto exit_free; | |
2190 | } | |
1fc7083d JG |
2191 | |
2192 | if (a[OVS_VPORT_ATTR_STATS]) | |
2193 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
2194 | ||
2195 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) | |
28aea917 | 2196 | vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 | 2197 | |
c25ea534 JG |
2198 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2199 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2200 | BUG_ON(err < 0); | |
f0fef760 | 2201 | |
cd2a59e9 | 2202 | ovs_unlock(); |
8680ae4d | 2203 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
c25ea534 JG |
2204 | return 0; |
2205 | ||
2206 | exit_free: | |
2207 | kfree_skb(reply); | |
f0fef760 | 2208 | exit_unlock: |
cd2a59e9 | 2209 | ovs_unlock(); |
c19e6535 BP |
2210 | exit: |
2211 | return err; | |
064af421 BP |
2212 | } |
2213 | ||
df2c07f4 | 2214 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2215 | { |
f0fef760 BP |
2216 | struct nlattr **a = info->attrs; |
2217 | struct sk_buff *reply; | |
c19e6535 | 2218 | struct vport *vport; |
c19e6535 BP |
2219 | int err; |
2220 | ||
df2c07f4 | 2221 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 2222 | if (err) |
c19e6535 BP |
2223 | goto exit; |
2224 | ||
cd2a59e9 | 2225 | ovs_lock(); |
2a4999f3 | 2226 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 2227 | err = PTR_ERR(vport); |
f0fef760 BP |
2228 | if (IS_ERR(vport)) |
2229 | goto exit_unlock; | |
c19e6535 | 2230 | |
df2c07f4 | 2231 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
2232 | err = -EINVAL; |
2233 | goto exit_unlock; | |
2234 | } | |
2235 | ||
28aea917 IY |
2236 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2237 | info->snd_seq, OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
2238 | err = PTR_ERR(reply); |
2239 | if (IS_ERR(reply)) | |
2240 | goto exit_unlock; | |
2241 | ||
b57d5819 | 2242 | err = 0; |
850b6b3b | 2243 | ovs_dp_detach_port(vport); |
f0fef760 | 2244 | |
e297c6b7 | 2245 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
f0fef760 BP |
2246 | |
2247 | exit_unlock: | |
cd2a59e9 | 2248 | ovs_unlock(); |
c19e6535 BP |
2249 | exit: |
2250 | return err; | |
7c40efc9 BP |
2251 | } |
2252 | ||
df2c07f4 | 2253 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2254 | { |
f0fef760 | 2255 | struct nlattr **a = info->attrs; |
df2c07f4 | 2256 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 2257 | struct sk_buff *reply; |
c19e6535 | 2258 | struct vport *vport; |
c19e6535 BP |
2259 | int err; |
2260 | ||
df2c07f4 | 2261 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
2262 | if (err) |
2263 | goto exit; | |
c19e6535 | 2264 | |
ed099e92 | 2265 | rcu_read_lock(); |
2a4999f3 | 2266 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2267 | err = PTR_ERR(vport); |
2268 | if (IS_ERR(vport)) | |
f0fef760 | 2269 | goto exit_unlock; |
c19e6535 | 2270 | |
28aea917 IY |
2271 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2272 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
2273 | err = PTR_ERR(reply); |
2274 | if (IS_ERR(reply)) | |
f0fef760 | 2275 | goto exit_unlock; |
ed099e92 | 2276 | |
df2fa9b5 JG |
2277 | rcu_read_unlock(); |
2278 | ||
2279 | return genlmsg_reply(reply, info); | |
ed099e92 | 2280 | |
f0fef760 | 2281 | exit_unlock: |
ed099e92 | 2282 | rcu_read_unlock(); |
f0fef760 | 2283 | exit: |
c19e6535 BP |
2284 | return err; |
2285 | } | |
2286 | ||
df2c07f4 | 2287 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2288 | { |
df2c07f4 | 2289 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2290 | struct datapath *dp; |
95b1d73a PS |
2291 | int bucket = cb->args[0], skip = cb->args[1]; |
2292 | int i, j = 0; | |
c19e6535 | 2293 | |
2a4999f3 | 2294 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 | 2295 | if (!dp) |
f0fef760 | 2296 | return -ENODEV; |
ed099e92 BP |
2297 | |
2298 | rcu_read_lock(); | |
95b1d73a | 2299 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2300 | struct vport *vport; |
95b1d73a PS |
2301 | |
2302 | j = 0; | |
f8dfbcb7 | 2303 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2304 | if (j >= skip && |
2305 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 2306 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2307 | cb->nlh->nlmsg_seq, |
2308 | NLM_F_MULTI, | |
2309 | OVS_VPORT_CMD_NEW) < 0) | |
2310 | goto out; | |
2311 | ||
2312 | j++; | |
2313 | } | |
2314 | skip = 0; | |
c19e6535 | 2315 | } |
95b1d73a | 2316 | out: |
ed099e92 | 2317 | rcu_read_unlock(); |
c19e6535 | 2318 | |
95b1d73a PS |
2319 | cb->args[0] = i; |
2320 | cb->args[1] = j; | |
f0fef760 | 2321 | |
95b1d73a | 2322 | return skb->len; |
7c40efc9 BP |
2323 | } |
2324 | ||
f0fef760 | 2325 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2326 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
2327 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2328 | .policy = vport_policy, | |
df2c07f4 | 2329 | .doit = ovs_vport_cmd_new |
f0fef760 | 2330 | }, |
df2c07f4 | 2331 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
2332 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2333 | .policy = vport_policy, | |
df2c07f4 | 2334 | .doit = ovs_vport_cmd_del |
f0fef760 | 2335 | }, |
df2c07f4 | 2336 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2337 | .flags = 0, /* OK for unprivileged users. */ |
2338 | .policy = vport_policy, | |
df2c07f4 JP |
2339 | .doit = ovs_vport_cmd_get, |
2340 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2341 | }, |
df2c07f4 | 2342 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
2343 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2344 | .policy = vport_policy, | |
df2c07f4 | 2345 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2346 | }, |
2347 | }; | |
2348 | ||
982b8810 BP |
2349 | struct genl_family_and_ops { |
2350 | struct genl_family *family; | |
2351 | struct genl_ops *ops; | |
2352 | int n_ops; | |
2353 | struct genl_multicast_group *group; | |
2354 | }; | |
ed099e92 | 2355 | |
982b8810 | 2356 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
2357 | { &dp_datapath_genl_family, |
2358 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
850b6b3b | 2359 | &ovs_dp_datapath_multicast_group }, |
f0fef760 BP |
2360 | { &dp_vport_genl_family, |
2361 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
850b6b3b | 2362 | &ovs_dp_vport_multicast_group }, |
37a1300c BP |
2363 | { &dp_flow_genl_family, |
2364 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
850b6b3b | 2365 | &ovs_dp_flow_multicast_group }, |
982b8810 BP |
2366 | { &dp_packet_genl_family, |
2367 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
2368 | NULL }, | |
2369 | }; | |
ed099e92 | 2370 | |
982b8810 BP |
2371 | static void dp_unregister_genl(int n_families) |
2372 | { | |
2373 | int i; | |
ed099e92 | 2374 | |
b867ca75 | 2375 | for (i = 0; i < n_families; i++) |
982b8810 | 2376 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
2377 | } |
2378 | ||
982b8810 | 2379 | static int dp_register_genl(void) |
064af421 | 2380 | { |
982b8810 BP |
2381 | int n_registered; |
2382 | int err; | |
2383 | int i; | |
064af421 | 2384 | |
982b8810 BP |
2385 | n_registered = 0; |
2386 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2387 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 2388 | |
982b8810 BP |
2389 | err = genl_register_family_with_ops(f->family, f->ops, |
2390 | f->n_ops); | |
2391 | if (err) | |
2392 | goto error; | |
2393 | n_registered++; | |
e22d4953 | 2394 | |
982b8810 BP |
2395 | if (f->group) { |
2396 | err = genl_register_mc_group(f->family, f->group); | |
2397 | if (err) | |
2398 | goto error; | |
2399 | } | |
2400 | } | |
9cc8b4e4 | 2401 | |
982b8810 | 2402 | return 0; |
064af421 BP |
2403 | |
2404 | error: | |
982b8810 BP |
2405 | dp_unregister_genl(n_registered); |
2406 | return err; | |
064af421 BP |
2407 | } |
2408 | ||
cd2a59e9 | 2409 | static void rehash_flow_table(struct work_struct *work) |
acd051f1 PS |
2410 | { |
2411 | struct datapath *dp; | |
2a4999f3 PS |
2412 | struct net *net; |
2413 | ||
cd2a59e9 | 2414 | ovs_lock(); |
2a4999f3 PS |
2415 | rtnl_lock(); |
2416 | for_each_net(net) { | |
2417 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
acd051f1 | 2418 | |
2a4999f3 | 2419 | list_for_each_entry(dp, &ovs_net->dps, list_node) { |
cd2a59e9 | 2420 | struct flow_table *old_table = ovsl_dereference(dp->table); |
2a4999f3 | 2421 | struct flow_table *new_table; |
acd051f1 | 2422 | |
2a4999f3 PS |
2423 | new_table = ovs_flow_tbl_rehash(old_table); |
2424 | if (!IS_ERR(new_table)) { | |
2425 | rcu_assign_pointer(dp->table, new_table); | |
a1c564be | 2426 | ovs_flow_tbl_destroy(old_table, true); |
2a4999f3 | 2427 | } |
acd051f1 PS |
2428 | } |
2429 | } | |
2a4999f3 | 2430 | rtnl_unlock(); |
cd2a59e9 | 2431 | ovs_unlock(); |
acd051f1 PS |
2432 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); |
2433 | } | |
2434 | ||
2a4999f3 PS |
2435 | static int __net_init ovs_init_net(struct net *net) |
2436 | { | |
2437 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2438 | ||
2439 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 2440 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
2a4999f3 PS |
2441 | return 0; |
2442 | } | |
2443 | ||
2444 | static void __net_exit ovs_exit_net(struct net *net) | |
2445 | { | |
cd2a59e9 | 2446 | struct datapath *dp, *dp_next; |
2a4999f3 PS |
2447 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
2448 | ||
cd2a59e9 PS |
2449 | ovs_lock(); |
2450 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2451 | __dp_destroy(dp); | |
2452 | ovs_unlock(); | |
2453 | ||
2454 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
2455 | } |
2456 | ||
2457 | static struct pernet_operations ovs_net_ops = { | |
2458 | .init = ovs_init_net, | |
2459 | .exit = ovs_exit_net, | |
2460 | .id = &ovs_net_id, | |
2461 | .size = sizeof(struct ovs_net), | |
2462 | }; | |
2463 | ||
637c8268 PS |
2464 | DEFINE_COMPAT_PNET_REG_FUNC(device); |
2465 | ||
22d24ebf BP |
2466 | static int __init dp_init(void) |
2467 | { | |
2468 | int err; | |
2469 | ||
f3d85db3 | 2470 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2471 | |
dc5f3fef | 2472 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 2473 | VERSION); |
064af421 | 2474 | |
16d650e5 | 2475 | err = ovs_workqueues_init(); |
b9c15df9 | 2476 | if (err) |
cd2a59e9 | 2477 | goto error; |
b9c15df9 | 2478 | |
850b6b3b | 2479 | err = ovs_flow_init(); |
3544358a | 2480 | if (err) |
85c9de19 | 2481 | goto error_wq; |
3544358a | 2482 | |
850b6b3b | 2483 | err = ovs_vport_init(); |
064af421 BP |
2484 | if (err) |
2485 | goto error_flow_exit; | |
2486 | ||
2a4999f3 | 2487 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2488 | if (err) |
2489 | goto error_vport_exit; | |
2490 | ||
2a4999f3 PS |
2491 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2492 | if (err) | |
2493 | goto error_netns_exit; | |
2494 | ||
982b8810 BP |
2495 | err = dp_register_genl(); |
2496 | if (err < 0) | |
37a1300c | 2497 | goto error_unreg_notifier; |
982b8810 | 2498 | |
acd051f1 PS |
2499 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); |
2500 | ||
064af421 BP |
2501 | return 0; |
2502 | ||
2503 | error_unreg_notifier: | |
850b6b3b | 2504 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2505 | error_netns_exit: |
2506 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2507 | error_vport_exit: |
850b6b3b | 2508 | ovs_vport_exit(); |
064af421 | 2509 | error_flow_exit: |
850b6b3b | 2510 | ovs_flow_exit(); |
16d650e5 PS |
2511 | error_wq: |
2512 | ovs_workqueues_exit(); | |
064af421 BP |
2513 | error: |
2514 | return err; | |
2515 | } | |
2516 | ||
2517 | static void dp_cleanup(void) | |
2518 | { | |
acd051f1 | 2519 | cancel_delayed_work_sync(&rehash_flow_wq); |
982b8810 | 2520 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
850b6b3b | 2521 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2522 | unregister_pernet_device(&ovs_net_ops); |
2523 | rcu_barrier(); | |
850b6b3b JG |
2524 | ovs_vport_exit(); |
2525 | ovs_flow_exit(); | |
16d650e5 | 2526 | ovs_workqueues_exit(); |
064af421 BP |
2527 | } |
2528 | ||
2529 | module_init(dp_init); | |
2530 | module_exit(dp_cleanup); | |
2531 | ||
2532 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2533 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2534 | MODULE_VERSION(VERSION); |