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Commit | Line | Data |
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064af421 | 1 | /* |
a5b8d49b | 2 | * Copyright (c) 2007-2014 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> |
36956a7d | 51 | #include <net/genetlink.h> |
2a4999f3 PS |
52 | #include <net/net_namespace.h> |
53 | #include <net/netns/generic.h> | |
064af421 | 54 | |
064af421 | 55 | #include "datapath.h" |
064af421 | 56 | #include "flow.h" |
d103f479 | 57 | #include "flow_table.h" |
a097c0b2 | 58 | #include "flow_netlink.h" |
303708cc | 59 | #include "vlan.h" |
f2459fe7 | 60 | #include "vport-internal_dev.h" |
d5de5b0d | 61 | #include "vport-netdev.h" |
064af421 | 62 | |
2a4999f3 | 63 | int ovs_net_id __read_mostly; |
5a38795f | 64 | EXPORT_SYMBOL_GPL(ovs_net_id); |
2a4999f3 | 65 | |
cb25142c PS |
66 | static struct genl_family dp_packet_genl_family; |
67 | static struct genl_family dp_flow_genl_family; | |
68 | static struct genl_family dp_datapath_genl_family; | |
69 | ||
bc619e29 JS |
70 | static const struct nla_policy flow_policy[]; |
71 | ||
cb25142c PS |
72 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { |
73 | .name = OVS_FLOW_MCGROUP | |
74 | }; | |
75 | ||
76 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { | |
77 | .name = OVS_DATAPATH_MCGROUP | |
78 | }; | |
79 | ||
80 | struct genl_multicast_group ovs_dp_vport_multicast_group = { | |
81 | .name = OVS_VPORT_MCGROUP | |
82 | }; | |
83 | ||
afad3556 | 84 | /* Check if need to build a reply message. |
af465b67 PS |
85 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. |
86 | */ | |
114fce23 SG |
87 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
88 | unsigned int group) | |
afad3556 JR |
89 | { |
90 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
6233a1bd | 91 | genl_has_listeners(family, genl_info_net(info), group); |
afad3556 JR |
92 | } |
93 | ||
cb25142c PS |
94 | static void ovs_notify(struct genl_family *family, struct genl_multicast_group *grp, |
95 | struct sk_buff *skb, struct genl_info *info) | |
e297c6b7 | 96 | { |
cb25142c PS |
97 | genl_notify(family, skb, genl_info_net(info), |
98 | info->snd_portid, GROUP_ID(grp), info->nlhdr, GFP_KERNEL); | |
e297c6b7 TG |
99 | } |
100 | ||
ed099e92 BP |
101 | /** |
102 | * DOC: Locking: | |
064af421 | 103 | * |
cd2a59e9 PS |
104 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
105 | * operations on vports, etc.), Writes to other state (flow table | |
106 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
107 | * by ovs_lock. | |
ed099e92 BP |
108 | * |
109 | * Reads are protected by RCU. | |
110 | * | |
111 | * There are a few special cases (mostly stats) that have their own | |
112 | * synchronization but they nest under all of above and don't interact with | |
113 | * each other. | |
cd2a59e9 PS |
114 | * |
115 | * The RTNL lock nests inside ovs_mutex. | |
064af421 | 116 | */ |
ed099e92 | 117 | |
cd2a59e9 PS |
118 | static DEFINE_MUTEX(ovs_mutex); |
119 | ||
120 | void ovs_lock(void) | |
121 | { | |
122 | mutex_lock(&ovs_mutex); | |
123 | } | |
124 | ||
125 | void ovs_unlock(void) | |
126 | { | |
127 | mutex_unlock(&ovs_mutex); | |
128 | } | |
129 | ||
130 | #ifdef CONFIG_LOCKDEP | |
131 | int lockdep_ovsl_is_held(void) | |
132 | { | |
133 | if (debug_locks) | |
134 | return lockdep_is_held(&ovs_mutex); | |
135 | else | |
136 | return 1; | |
137 | } | |
5a38795f | 138 | EXPORT_SYMBOL_GPL(lockdep_ovsl_is_held); |
cd2a59e9 PS |
139 | #endif |
140 | ||
5ae440c3 | 141 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
f1f60b85 TG |
142 | const struct sw_flow_key *, |
143 | const struct dp_upcall_info *); | |
5ae440c3 | 144 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
7d16c847 | 145 | const struct sw_flow_key *, |
7257b535 | 146 | const struct dp_upcall_info *); |
064af421 | 147 | |
01ac0970 AZ |
148 | /* Must be called with rcu_read_lock. */ |
149 | static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex) | |
064af421 | 150 | { |
01ac0970 | 151 | struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex); |
ed099e92 | 152 | |
254f2dc8 | 153 | if (dev) { |
850b6b3b | 154 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 | 155 | if (vport) |
01ac0970 | 156 | return vport->dp; |
254f2dc8 | 157 | } |
01ac0970 AZ |
158 | |
159 | return NULL; | |
160 | } | |
161 | ||
162 | /* The caller must hold either ovs_mutex or rcu_read_lock to keep the | |
af465b67 PS |
163 | * returned dp pointer valid. |
164 | */ | |
01ac0970 AZ |
165 | static inline struct datapath *get_dp(struct net *net, int dp_ifindex) |
166 | { | |
167 | struct datapath *dp; | |
168 | ||
169 | WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); | |
170 | rcu_read_lock(); | |
171 | dp = get_dp_rcu(net, dp_ifindex); | |
254f2dc8 BP |
172 | rcu_read_unlock(); |
173 | ||
174 | return dp; | |
064af421 | 175 | } |
064af421 | 176 | |
cd2a59e9 | 177 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 178 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 179 | { |
cd2a59e9 | 180 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
16b82e84 | 181 | return vport->ops->get_name(vport); |
f2459fe7 JG |
182 | } |
183 | ||
f1f60b85 | 184 | static int get_dpifindex(const struct datapath *dp) |
99769a40 JG |
185 | { |
186 | struct vport *local; | |
187 | int ifindex; | |
188 | ||
189 | rcu_read_lock(); | |
190 | ||
95b1d73a | 191 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 192 | if (local) |
d5de5b0d | 193 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
99769a40 JG |
194 | else |
195 | ifindex = 0; | |
196 | ||
197 | rcu_read_unlock(); | |
198 | ||
199 | return ifindex; | |
200 | } | |
201 | ||
46c6a11d JG |
202 | static void destroy_dp_rcu(struct rcu_head *rcu) |
203 | { | |
204 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 205 | |
e379e4d1 | 206 | ovs_flow_tbl_destroy(&dp->table); |
46c6a11d | 207 | free_percpu(dp->stats_percpu); |
2a4999f3 | 208 | release_net(ovs_dp_get_net(dp)); |
95b1d73a | 209 | kfree(dp->ports); |
5ca1ba48 | 210 | kfree(dp); |
46c6a11d JG |
211 | } |
212 | ||
95b1d73a PS |
213 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
214 | u16 port_no) | |
215 | { | |
216 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
217 | } | |
218 | ||
aa917006 | 219 | /* Called with ovs_mutex or RCU read lock. */ |
95b1d73a PS |
220 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
221 | { | |
222 | struct vport *vport; | |
95b1d73a PS |
223 | struct hlist_head *head; |
224 | ||
225 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 226 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
227 | if (vport->port_no == port_no) |
228 | return vport; | |
229 | } | |
230 | return NULL; | |
231 | } | |
232 | ||
cd2a59e9 | 233 | /* Called with ovs_mutex. */ |
c19e6535 | 234 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 235 | { |
f2459fe7 | 236 | struct vport *vport; |
f2459fe7 | 237 | |
850b6b3b | 238 | vport = ovs_vport_add(parms); |
c19e6535 BP |
239 | if (!IS_ERR(vport)) { |
240 | struct datapath *dp = parms->dp; | |
95b1d73a | 241 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 242 | |
95b1d73a | 243 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 244 | } |
c19e6535 | 245 | return vport; |
064af421 BP |
246 | } |
247 | ||
850b6b3b | 248 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 249 | { |
cd2a59e9 | 250 | ASSERT_OVSL(); |
064af421 | 251 | |
064af421 | 252 | /* First drop references to device. */ |
95b1d73a | 253 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 254 | |
7237e4f4 | 255 | /* Then destroy it. */ |
850b6b3b | 256 | ovs_vport_del(p); |
064af421 BP |
257 | } |
258 | ||
fb66fbd1 | 259 | /* Must be called with rcu_read_lock. */ |
e74d4817 | 260 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 261 | { |
a6059080 | 262 | const struct vport *p = OVS_CB(skb)->input_vport; |
064af421 | 263 | struct datapath *dp = p->dp; |
3544358a | 264 | struct sw_flow *flow; |
ad50cb60 | 265 | struct sw_flow_actions *sf_acts; |
064af421 | 266 | struct dp_stats_percpu *stats; |
e9141eec | 267 | u64 *stats_counter; |
4fa72a95 | 268 | u32 n_mask_hit; |
064af421 | 269 | |
70dbc259 | 270 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 271 | |
52a23d92 | 272 | /* Look up flow. */ |
e74d4817 | 273 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
5604935e | 274 | &n_mask_hit); |
52a23d92 JG |
275 | if (unlikely(!flow)) { |
276 | struct dp_upcall_info upcall; | |
a7d607c5 | 277 | int error; |
52a23d92 JG |
278 | |
279 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
52a23d92 | 280 | upcall.userdata = NULL; |
beb1c69a | 281 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
8b7ea2d4 | 282 | upcall.egress_tun_info = NULL; |
e74d4817 | 283 | error = ovs_dp_upcall(dp, skb, key, &upcall); |
a7d607c5 LR |
284 | if (unlikely(error)) |
285 | kfree_skb(skb); | |
286 | else | |
287 | consume_skb(skb); | |
52a23d92 JG |
288 | stats_counter = &stats->n_missed; |
289 | goto out; | |
290 | } | |
291 | ||
e74d4817 | 292 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
ad50cb60 | 293 | sf_acts = rcu_dereference(flow->sf_acts); |
7d16c847 PS |
294 | ovs_execute_actions(dp, skb, sf_acts, key); |
295 | ||
b0b906cc | 296 | stats_counter = &stats->n_hit; |
55574bb0 | 297 | |
8819fac7 | 298 | out: |
55574bb0 | 299 | /* Update datapath statistics. */ |
b81deb15 | 300 | u64_stats_update_begin(&stats->syncp); |
e9141eec | 301 | (*stats_counter)++; |
4fa72a95 | 302 | stats->n_mask_hit += n_mask_hit; |
b81deb15 | 303 | u64_stats_update_end(&stats->syncp); |
064af421 BP |
304 | } |
305 | ||
850b6b3b | 306 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 307 | const struct sw_flow_key *key, |
850b6b3b | 308 | const struct dp_upcall_info *upcall_info) |
aa5a8fdc JG |
309 | { |
310 | struct dp_stats_percpu *stats; | |
311 | int err; | |
312 | ||
28aea917 | 313 | if (upcall_info->portid == 0) { |
b063d9f0 | 314 | err = -ENOTCONN; |
b063d9f0 JG |
315 | goto err; |
316 | } | |
317 | ||
7257b535 | 318 | if (!skb_is_gso(skb)) |
e74d4817 | 319 | err = queue_userspace_packet(dp, skb, key, upcall_info); |
7257b535 | 320 | else |
e74d4817 | 321 | err = queue_gso_packets(dp, skb, key, upcall_info); |
d76195db JG |
322 | if (err) |
323 | goto err; | |
324 | ||
325 | return 0; | |
aa5a8fdc | 326 | |
aa5a8fdc | 327 | err: |
70dbc259 | 328 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 329 | |
b81deb15 | 330 | u64_stats_update_begin(&stats->syncp); |
aa5a8fdc | 331 | stats->n_lost++; |
b81deb15 | 332 | u64_stats_update_end(&stats->syncp); |
aa5a8fdc | 333 | |
aa5a8fdc | 334 | return err; |
982b8810 BP |
335 | } |
336 | ||
5ae440c3 | 337 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 338 | const struct sw_flow_key *key, |
7257b535 | 339 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 340 | { |
d4cba1f8 | 341 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
342 | struct sw_flow_key later_key; |
343 | struct sk_buff *segs, *nskb; | |
b2a23c4e | 344 | struct ovs_skb_cb ovs_cb; |
7257b535 | 345 | int err; |
cb5087ca | 346 | |
b2a23c4e | 347 | ovs_cb = *OVS_CB(skb); |
1d04cd4e | 348 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
b2a23c4e | 349 | *OVS_CB(skb) = ovs_cb; |
79089764 PS |
350 | if (IS_ERR(segs)) |
351 | return PTR_ERR(segs); | |
d1da7669 PS |
352 | if (segs == NULL) |
353 | return -EINVAL; | |
99769a40 | 354 | |
9b277b39 | 355 | if (gso_type & SKB_GSO_UDP) { |
c135bba1 | 356 | /* The initial flow key extracted by ovs_flow_key_extract() |
9b277b39 PS |
357 | * in this case is for a first fragment, so we need to |
358 | * properly mark later fragments. | |
359 | */ | |
e74d4817 | 360 | later_key = *key; |
9b277b39 PS |
361 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
362 | } | |
363 | ||
7257b535 BP |
364 | /* Queue all of the segments. */ |
365 | skb = segs; | |
cb5087ca | 366 | do { |
b2a23c4e | 367 | *OVS_CB(skb) = ovs_cb; |
9b277b39 | 368 | if (gso_type & SKB_GSO_UDP && skb != segs) |
e74d4817 | 369 | key = &later_key; |
9b277b39 | 370 | |
e74d4817 | 371 | err = queue_userspace_packet(dp, skb, key, upcall_info); |
982b8810 | 372 | if (err) |
7257b535 | 373 | break; |
856081f6 | 374 | |
36ce148c | 375 | } while ((skb = skb->next)); |
cb5087ca | 376 | |
7257b535 BP |
377 | /* Free all of the segments. */ |
378 | skb = segs; | |
379 | do { | |
380 | nskb = skb->next; | |
381 | if (err) | |
382 | kfree_skb(skb); | |
383 | else | |
384 | consume_skb(skb); | |
385 | } while ((skb = nskb)); | |
386 | return err; | |
387 | } | |
388 | ||
8b7ea2d4 | 389 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
533bea51 | 390 | unsigned int hdrlen) |
0afa2373 TG |
391 | { |
392 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
533bea51 | 393 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
4e25b8c1 | 394 | + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
0afa2373 TG |
395 | |
396 | /* OVS_PACKET_ATTR_USERDATA */ | |
8b7ea2d4 WZ |
397 | if (upcall_info->userdata) |
398 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
399 | ||
400 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
401 | if (upcall_info->egress_tun_info) | |
402 | size += nla_total_size(ovs_tun_key_attr_size()); | |
0afa2373 TG |
403 | |
404 | return size; | |
405 | } | |
406 | ||
5ae440c3 | 407 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 408 | const struct sw_flow_key *key, |
7257b535 BP |
409 | const struct dp_upcall_info *upcall_info) |
410 | { | |
411 | struct ovs_header *upcall; | |
6161d3fd | 412 | struct sk_buff *nskb = NULL; |
82706a6f | 413 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
7257b535 | 414 | struct nlattr *nla; |
68eadcf0 | 415 | struct genl_info info = { |
705e9260 | 416 | #ifdef HAVE_GENLMSG_NEW_UNICAST |
5ae440c3 | 417 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
68eadcf0 TG |
418 | #endif |
419 | .snd_portid = upcall_info->portid, | |
420 | }; | |
978188b2 | 421 | size_t len; |
533bea51 | 422 | unsigned int hlen; |
5ae440c3 TG |
423 | int err, dp_ifindex; |
424 | ||
425 | dp_ifindex = get_dpifindex(dp); | |
426 | if (!dp_ifindex) | |
427 | return -ENODEV; | |
7257b535 | 428 | |
efd8a18e | 429 | if (skb_vlan_tag_present(skb)) { |
6161d3fd JG |
430 | nskb = skb_clone(skb, GFP_ATOMIC); |
431 | if (!nskb) | |
432 | return -ENOMEM; | |
07ac71ea | 433 | |
efd8a18e | 434 | nskb = vlan_insert_tag_set_proto(nskb, nskb->vlan_proto, skb_vlan_tag_get(nskb)); |
07ac71ea PS |
435 | if (!nskb) |
436 | return -ENOMEM; | |
437 | ||
438 | vlan_set_tci(nskb, 0); | |
7257b535 | 439 | |
6161d3fd JG |
440 | skb = nskb; |
441 | } | |
442 | ||
443 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
444 | err = -EFBIG; | |
445 | goto out; | |
446 | } | |
7257b535 | 447 | |
533bea51 TG |
448 | /* Complete checksum if needed */ |
449 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
450 | (err = skb_checksum_help(skb))) | |
451 | goto out; | |
452 | ||
453 | /* Older versions of OVS user space enforce alignment of the last | |
454 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
455 | * padding logic. Only perform zerocopy if padding is not required. | |
456 | */ | |
457 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
458 | hlen = skb_zerocopy_headlen(skb); | |
459 | else | |
460 | hlen = skb->len; | |
461 | ||
8b7ea2d4 | 462 | len = upcall_msg_size(upcall_info, hlen); |
68eadcf0 | 463 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
6161d3fd JG |
464 | if (!user_skb) { |
465 | err = -ENOMEM; | |
466 | goto out; | |
467 | } | |
7257b535 BP |
468 | |
469 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
470 | 0, upcall_info->cmd); | |
471 | upcall->dp_ifindex = dp_ifindex; | |
472 | ||
db7f2238 | 473 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
9a621f82 | 474 | BUG_ON(err); |
7257b535 BP |
475 | |
476 | if (upcall_info->userdata) | |
e995e3df | 477 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 478 | nla_len(upcall_info->userdata), |
e995e3df | 479 | nla_data(upcall_info->userdata)); |
7257b535 | 480 | |
8b7ea2d4 WZ |
481 | if (upcall_info->egress_tun_info) { |
482 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
483 | err = ovs_nla_put_egress_tunnel_key(user_skb, | |
484 | upcall_info->egress_tun_info); | |
485 | BUG_ON(err); | |
486 | nla_nest_end(user_skb, nla); | |
487 | } | |
488 | ||
533bea51 | 489 | /* Only reserve room for attribute header, packet data is added |
af465b67 PS |
490 | * in skb_zerocopy() |
491 | */ | |
533bea51 TG |
492 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { |
493 | err = -ENOBUFS; | |
494 | goto out; | |
495 | } | |
496 | nla->nla_len = nla_attr_size(skb->len); | |
bed53bd1 | 497 | |
2c272bd9 ZK |
498 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
499 | if (err) | |
500 | goto out; | |
7257b535 | 501 | |
ef507cec | 502 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
978188b2 JG |
503 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { |
504 | size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len; | |
505 | ||
506 | if (plen > 0) | |
507 | memset(skb_put(user_skb, plen), 0, plen); | |
508 | } | |
ef507cec | 509 | |
533bea51 | 510 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
6161d3fd | 511 | |
533bea51 | 512 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
82706a6f | 513 | user_skb = NULL; |
6161d3fd | 514 | out: |
2c272bd9 ZK |
515 | if (err) |
516 | skb_tx_error(skb); | |
82706a6f | 517 | kfree_skb(user_skb); |
6161d3fd JG |
518 | kfree_skb(nskb); |
519 | return err; | |
cb5087ca BP |
520 | } |
521 | ||
df2c07f4 | 522 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 523 | { |
df2c07f4 | 524 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 525 | struct nlattr **a = info->attrs; |
e0e57990 | 526 | struct sw_flow_actions *acts; |
982b8810 | 527 | struct sk_buff *packet; |
e0e57990 | 528 | struct sw_flow *flow; |
ad50cb60 | 529 | struct sw_flow_actions *sf_acts; |
f7cd0081 | 530 | struct datapath *dp; |
d6569377 | 531 | struct ethhdr *eth; |
a6059080 | 532 | struct vport *input_vport; |
3f19d399 | 533 | int len; |
d6569377 | 534 | int err; |
2e460098 | 535 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
064af421 | 536 | |
f7cd0081 | 537 | err = -EINVAL; |
df2c07f4 | 538 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 539 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 540 | goto err; |
064af421 | 541 | |
df2c07f4 | 542 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 543 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
544 | err = -ENOMEM; |
545 | if (!packet) | |
e5cad958 | 546 | goto err; |
3f19d399 BP |
547 | skb_reserve(packet, NET_IP_ALIGN); |
548 | ||
bf3d6fce | 549 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 550 | |
f7cd0081 BP |
551 | skb_reset_mac_header(packet); |
552 | eth = eth_hdr(packet); | |
064af421 | 553 | |
d6569377 BP |
554 | /* Normally, setting the skb 'protocol' field would be handled by a |
555 | * call to eth_type_trans(), but it assumes there's a sending | |
af465b67 PS |
556 | * device, which we may not have. |
557 | */ | |
7cd46155 | 558 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
f7cd0081 | 559 | packet->protocol = eth->h_proto; |
d6569377 | 560 | else |
f7cd0081 | 561 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 562 | |
e0e57990 | 563 | /* Build an sw_flow for sending this packet. */ |
df65fec1 | 564 | flow = ovs_flow_alloc(); |
e0e57990 BP |
565 | err = PTR_ERR(flow); |
566 | if (IS_ERR(flow)) | |
e5cad958 | 567 | goto err_kfree_skb; |
064af421 | 568 | |
c135bba1 | 569 | err = ovs_flow_key_extract_userspace(a[OVS_PACKET_ATTR_KEY], packet, |
9233cef7 | 570 | &flow->key, log); |
e0e57990 | 571 | if (err) |
9321954a | 572 | goto err_flow_free; |
e0e57990 | 573 | |
a097c0b2 | 574 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
9233cef7 | 575 | &flow->key, &acts, log); |
9b405f1a PS |
576 | if (err) |
577 | goto err_flow_free; | |
e0e57990 | 578 | |
ff27161e | 579 | rcu_assign_pointer(flow->sf_acts, acts); |
800711c3 | 580 | OVS_CB(packet)->egress_tun_info = NULL; |
abff858b | 581 | packet->priority = flow->key.phy.priority; |
3025a772 | 582 | packet->mark = flow->key.phy.skb_mark; |
e0e57990 | 583 | |
d6569377 | 584 | rcu_read_lock(); |
01ac0970 | 585 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 586 | err = -ENODEV; |
e5cad958 BP |
587 | if (!dp) |
588 | goto err_unlock; | |
cc4015df | 589 | |
a6059080 AZ |
590 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
591 | if (!input_vport) | |
592 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
593 | ||
594 | if (!input_vport) | |
595 | goto err_unlock; | |
596 | ||
597 | OVS_CB(packet)->input_vport = input_vport; | |
ad50cb60 | 598 | sf_acts = rcu_dereference(flow->sf_acts); |
a6059080 | 599 | |
e9141eec | 600 | local_bh_disable(); |
7d16c847 | 601 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
e9141eec | 602 | local_bh_enable(); |
d6569377 | 603 | rcu_read_unlock(); |
e0e57990 | 604 | |
a1c564be | 605 | ovs_flow_free(flow, false); |
e5cad958 | 606 | return err; |
064af421 | 607 | |
e5cad958 BP |
608 | err_unlock: |
609 | rcu_read_unlock(); | |
9321954a | 610 | err_flow_free: |
a1c564be | 611 | ovs_flow_free(flow, false); |
e5cad958 BP |
612 | err_kfree_skb: |
613 | kfree_skb(packet); | |
614 | err: | |
d6569377 | 615 | return err; |
064af421 BP |
616 | } |
617 | ||
df2c07f4 | 618 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc | 619 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
df2c07f4 JP |
620 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
621 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
2e460098 | 622 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
982b8810 BP |
623 | }; |
624 | ||
625 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 626 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
627 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
628 | .policy = packet_policy, | |
df2c07f4 | 629 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
630 | } |
631 | }; | |
632 | ||
cb25142c PS |
633 | static struct genl_family dp_packet_genl_family = { |
634 | .id = GENL_ID_GENERATE, | |
635 | .hdrsize = sizeof(struct ovs_header), | |
636 | .name = OVS_PACKET_FAMILY, | |
637 | .version = OVS_PACKET_VERSION, | |
638 | .maxattr = OVS_PACKET_ATTR_MAX, | |
639 | .netnsok = true, | |
640 | .parallel_ops = true, | |
641 | .ops = dp_packet_genl_ops, | |
642 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
643 | }; | |
644 | ||
f1f60b85 | 645 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
4fa72a95 | 646 | struct ovs_dp_megaflow_stats *mega_stats) |
064af421 | 647 | { |
d6569377 | 648 | int i; |
f180c2e2 | 649 | |
4fa72a95 AZ |
650 | memset(mega_stats, 0, sizeof(*mega_stats)); |
651 | ||
994dc286 | 652 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
4fa72a95 | 653 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
064af421 | 654 | |
7257b535 | 655 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
4fa72a95 | 656 | |
d6569377 BP |
657 | for_each_possible_cpu(i) { |
658 | const struct dp_stats_percpu *percpu_stats; | |
659 | struct dp_stats_percpu local_stats; | |
821cb9fa | 660 | unsigned int start; |
44e05eca | 661 | |
d6569377 | 662 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 663 | |
d6569377 | 664 | do { |
b81deb15 | 665 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
d6569377 | 666 | local_stats = *percpu_stats; |
b81deb15 | 667 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
064af421 | 668 | |
d6569377 BP |
669 | stats->n_hit += local_stats.n_hit; |
670 | stats->n_missed += local_stats.n_missed; | |
671 | stats->n_lost += local_stats.n_lost; | |
4fa72a95 | 672 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
d6569377 BP |
673 | } |
674 | } | |
064af421 | 675 | |
bc619e29 JS |
676 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
677 | { | |
678 | return ovs_identifier_is_ufid(sfid) && | |
679 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
680 | } | |
681 | ||
682 | static bool should_fill_mask(uint32_t ufid_flags) | |
683 | { | |
684 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
685 | } | |
686 | ||
687 | static bool should_fill_actions(uint32_t ufid_flags) | |
0afa2373 | 688 | { |
bc619e29 JS |
689 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
690 | } | |
691 | ||
692 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
693 | const struct sw_flow_id *sfid, | |
694 | uint32_t ufid_flags) | |
695 | { | |
696 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
697 | ||
698 | /* OVS_FLOW_ATTR_UFID */ | |
699 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
700 | len += nla_total_size(sfid->ufid_len); | |
701 | ||
702 | /* OVS_FLOW_ATTR_KEY */ | |
703 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
704 | len += nla_total_size(ovs_key_attr_size()); | |
705 | ||
706 | /* OVS_FLOW_ATTR_MASK */ | |
707 | if (should_fill_mask(ufid_flags)) | |
708 | len += nla_total_size(ovs_key_attr_size()); | |
709 | ||
710 | /* OVS_FLOW_ATTR_ACTIONS */ | |
711 | if (should_fill_actions(ufid_flags)) | |
712 | len += nla_total_size(acts->actions_len); | |
713 | ||
714 | return len | |
0afa2373 TG |
715 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
716 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
bc619e29 | 717 | + nla_total_size(8); /* OVS_FLOW_ATTR_USED */ |
0afa2373 TG |
718 | } |
719 | ||
f1948bb9 JS |
720 | /* Called with ovs_mutex or RCU read lock. */ |
721 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
722 | struct sk_buff *skb) | |
723 | { | |
724 | struct ovs_flow_stats stats; | |
725 | __be16 tcp_flags; | |
726 | unsigned long used; | |
727 | ||
b0f3a2fe | 728 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
f71db6b1 | 729 | |
b0f3a2fe PS |
730 | if (used && |
731 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
f1948bb9 | 732 | return -EMSGSIZE; |
d6569377 | 733 | |
b0f3a2fe PS |
734 | if (stats.n_packets && |
735 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) | |
f1948bb9 | 736 | return -EMSGSIZE; |
b0b906cc | 737 | |
b0f3a2fe PS |
738 | if ((u8)ntohs(tcp_flags) && |
739 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
f1948bb9 JS |
740 | return -EMSGSIZE; |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
745 | /* Called with ovs_mutex or RCU read lock. */ | |
746 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
747 | struct sk_buff *skb, int skb_orig_len) | |
748 | { | |
749 | struct nlattr *start; | |
750 | int err; | |
d6569377 | 751 | |
df2c07f4 | 752 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
753 | * this is the first flow to be dumped into 'skb'. This is unusual for |
754 | * Netlink but individual action lists can be longer than | |
755 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
756 | * The userspace caller can always fetch the actions separately if it | |
757 | * really wants them. (Most userspace callers in fact don't care.) | |
758 | * | |
759 | * This can only fail for dump operations because the skb is always | |
760 | * properly sized for single flows. | |
761 | */ | |
9b405f1a | 762 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 763 | if (start) { |
f44ccce1 PS |
764 | const struct sw_flow_actions *sf_acts; |
765 | ||
780ec6ae | 766 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
a097c0b2 PS |
767 | err = ovs_nla_put_actions(sf_acts->actions, |
768 | sf_acts->actions_len, skb); | |
f71db6b1 | 769 | |
0a25b039 BP |
770 | if (!err) |
771 | nla_nest_end(skb, start); | |
772 | else { | |
773 | if (skb_orig_len) | |
f1948bb9 | 774 | return err; |
0a25b039 BP |
775 | |
776 | nla_nest_cancel(skb, start); | |
777 | } | |
f1948bb9 JS |
778 | } else if (skb_orig_len) { |
779 | return -EMSGSIZE; | |
780 | } | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
785 | /* Called with ovs_mutex or RCU read lock. */ | |
2c622e5a | 786 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
f1948bb9 | 787 | struct sk_buff *skb, u32 portid, |
bc619e29 | 788 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
f1948bb9 JS |
789 | { |
790 | const int skb_orig_len = skb->len; | |
791 | struct ovs_header *ovs_header; | |
792 | int err; | |
793 | ||
7d16c847 PS |
794 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, |
795 | flags, cmd); | |
f1948bb9 JS |
796 | if (!ovs_header) |
797 | return -EMSGSIZE; | |
7d16c847 | 798 | |
f1948bb9 JS |
799 | ovs_header->dp_ifindex = dp_ifindex; |
800 | ||
bc619e29 | 801 | err = ovs_nla_put_identifier(flow, skb); |
db7f2238 JS |
802 | if (err) |
803 | goto error; | |
804 | ||
bc619e29 JS |
805 | if (should_fill_key(&flow->id, ufid_flags)) { |
806 | err = ovs_nla_put_masked_key(flow, skb); | |
807 | if (err) | |
808 | goto error; | |
809 | } | |
810 | ||
811 | if (should_fill_mask(ufid_flags)) { | |
812 | err = ovs_nla_put_mask(flow, skb); | |
813 | if (err) | |
814 | goto error; | |
815 | } | |
f1948bb9 JS |
816 | |
817 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
818 | if (err) | |
819 | goto error; | |
820 | ||
bc619e29 JS |
821 | if (should_fill_actions(ufid_flags)) { |
822 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
823 | if (err) | |
824 | goto error; | |
825 | } | |
37a1300c | 826 | |
23b48dc1 TG |
827 | genlmsg_end(skb, ovs_header); |
828 | return 0; | |
d6569377 | 829 | |
37a1300c | 830 | error: |
df2c07f4 | 831 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 832 | return err; |
44e05eca BP |
833 | } |
834 | ||
f71db6b1 JR |
835 | /* May not be called with RCU read lock. */ |
836 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
bc619e29 | 837 | const struct sw_flow_id *sfid, |
afad3556 | 838 | struct genl_info *info, |
bc619e29 JS |
839 | bool always, |
840 | uint32_t ufid_flags) | |
44e05eca | 841 | { |
afad3556 | 842 | struct sk_buff *skb; |
bc619e29 | 843 | size_t len; |
d6569377 | 844 | |
114fce23 SG |
845 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, |
846 | GROUP_ID(&ovs_dp_flow_multicast_group))) | |
afad3556 JR |
847 | return NULL; |
848 | ||
bc619e29 JS |
849 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
850 | skb = genlmsg_new_unicast(len, info, GFP_KERNEL); | |
afad3556 JR |
851 | if (!skb) |
852 | return ERR_PTR(-ENOMEM); | |
853 | ||
854 | return skb; | |
37a1300c | 855 | } |
8d5ebd83 | 856 | |
f71db6b1 | 857 | /* Called with ovs_mutex. */ |
7d16c847 | 858 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, |
f71db6b1 JR |
859 | int dp_ifindex, |
860 | struct genl_info *info, u8 cmd, | |
bc619e29 | 861 | bool always, u32 ufid_flags) |
37a1300c BP |
862 | { |
863 | struct sk_buff *skb; | |
864 | int retval; | |
d6569377 | 865 | |
bc619e29 JS |
866 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
867 | &flow->id, info, always, ufid_flags); | |
a6ddcc9a | 868 | if (IS_ERR_OR_NULL(skb)) |
afad3556 | 869 | return skb; |
d6569377 | 870 | |
2c622e5a | 871 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
f71db6b1 | 872 | info->snd_portid, info->snd_seq, 0, |
bc619e29 | 873 | cmd, ufid_flags); |
37a1300c | 874 | BUG_ON(retval < 0); |
d6569377 | 875 | return skb; |
064af421 BP |
876 | } |
877 | ||
0c9fd022 | 878 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
064af421 | 879 | { |
37a1300c | 880 | struct nlattr **a = info->attrs; |
df2c07f4 | 881 | struct ovs_header *ovs_header = info->userhdr; |
bc619e29 | 882 | struct sw_flow *flow = NULL, *new_flow; |
a1c564be | 883 | struct sw_flow_mask mask; |
37a1300c | 884 | struct sk_buff *reply; |
9c52546b | 885 | struct datapath *dp; |
bc619e29 | 886 | struct sw_flow_key key; |
0c9fd022 | 887 | struct sw_flow_actions *acts; |
a1c564be | 888 | struct sw_flow_match match; |
bc619e29 | 889 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
bc4a05c6 | 890 | int error; |
9233cef7 | 891 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
064af421 | 892 | |
6740b721 | 893 | /* Must have key and actions. */ |
37a1300c | 894 | error = -EINVAL; |
a473df5b | 895 | if (!a[OVS_FLOW_ATTR_KEY]) { |
7d16c847 | 896 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
37a1300c | 897 | goto error; |
a473df5b JG |
898 | } |
899 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
7d16c847 | 900 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
6740b721 | 901 | goto error; |
a473df5b | 902 | } |
a1c564be | 903 | |
6740b721 | 904 | /* Most of the time we need to allocate a new flow, do it before |
af465b67 PS |
905 | * locking. |
906 | */ | |
6740b721 JR |
907 | new_flow = ovs_flow_alloc(); |
908 | if (IS_ERR(new_flow)) { | |
909 | error = PTR_ERR(new_flow); | |
910 | goto error; | |
911 | } | |
912 | ||
913 | /* Extract key. */ | |
bc619e29 | 914 | ovs_match_init(&match, &key, &mask); |
9233cef7 JR |
915 | error = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], |
916 | a[OVS_FLOW_ATTR_MASK], log); | |
37a1300c | 917 | if (error) |
6740b721 | 918 | goto err_kfree_flow; |
064af421 | 919 | |
bc619e29 JS |
920 | ovs_flow_mask_key(&new_flow->key, &key, &mask); |
921 | ||
922 | /* Extract flow identifier. */ | |
923 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
924 | &key, log); | |
925 | if (error) | |
926 | goto err_kfree_flow; | |
9b405f1a | 927 | |
6740b721 | 928 | /* Validate actions. */ |
6740b721 | 929 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key, |
9233cef7 | 930 | &acts, log); |
0c9fd022 | 931 | if (error) { |
7d16c847 | 932 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
4f67b12a | 933 | goto err_kfree_flow; |
6740b721 JR |
934 | } |
935 | ||
bc619e29 JS |
936 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
937 | ufid_flags); | |
6740b721 JR |
938 | if (IS_ERR(reply)) { |
939 | error = PTR_ERR(reply); | |
940 | goto err_kfree_acts; | |
37a1300c BP |
941 | } |
942 | ||
cd2a59e9 | 943 | ovs_lock(); |
2a4999f3 | 944 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
6740b721 JR |
945 | if (unlikely(!dp)) { |
946 | error = -ENODEV; | |
cd2a59e9 | 947 | goto err_unlock_ovs; |
6740b721 | 948 | } |
bc619e29 | 949 | |
a1c564be | 950 | /* Check if this is a duplicate flow */ |
bc619e29 JS |
951 | if (ovs_identifier_is_ufid(&new_flow->id)) |
952 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
953 | if (!flow) | |
954 | flow = ovs_flow_tbl_lookup(&dp->table, &key); | |
6740b721 JR |
955 | if (likely(!flow)) { |
956 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
d6569377 | 957 | |
d6569377 | 958 | /* Put flow in bucket. */ |
6740b721 JR |
959 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
960 | if (unlikely(error)) { | |
0585f7a8 | 961 | acts = NULL; |
6740b721 JR |
962 | goto err_unlock_ovs; |
963 | } | |
964 | ||
965 | if (unlikely(reply)) { | |
2c622e5a | 966 | error = ovs_flow_cmd_fill_info(new_flow, |
6740b721 JR |
967 | ovs_header->dp_ifindex, |
968 | reply, info->snd_portid, | |
969 | info->snd_seq, 0, | |
bc619e29 JS |
970 | OVS_FLOW_CMD_NEW, |
971 | ufid_flags); | |
6740b721 | 972 | BUG_ON(error < 0); |
0585f7a8 | 973 | } |
6740b721 | 974 | ovs_unlock(); |
d6569377 | 975 | } else { |
0c9fd022 JR |
976 | struct sw_flow_actions *old_acts; |
977 | ||
d6569377 BP |
978 | /* Bail out if we're not allowed to modify an existing flow. |
979 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
980 | * because Generic Netlink treats the latter as a dump | |
981 | * request. We also accept NLM_F_EXCL in case that bug ever | |
982 | * gets fixed. | |
983 | */ | |
6740b721 JR |
984 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
985 | | NLM_F_EXCL))) { | |
986 | error = -EEXIST; | |
cd2a59e9 | 987 | goto err_unlock_ovs; |
6740b721 | 988 | } |
bc619e29 JS |
989 | /* The flow identifier has to be the same for flow updates. |
990 | * Look for any overlapping flow. | |
991 | */ | |
992 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
993 | if (ovs_identifier_is_key(&flow->id)) | |
994 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
995 | &match); | |
996 | else /* UFID matches but key is different */ | |
997 | flow = NULL; | |
3440e4bc AW |
998 | if (!flow) { |
999 | error = -ENOENT; | |
1000 | goto err_unlock_ovs; | |
1001 | } | |
6740b721 | 1002 | } |
0c9fd022 JR |
1003 | /* Update actions. */ |
1004 | old_acts = ovsl_dereference(flow->sf_acts); | |
1005 | rcu_assign_pointer(flow->sf_acts, acts); | |
0c9fd022 | 1006 | |
6740b721 | 1007 | if (unlikely(reply)) { |
2c622e5a | 1008 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1009 | ovs_header->dp_ifindex, |
1010 | reply, info->snd_portid, | |
1011 | info->snd_seq, 0, | |
bc619e29 JS |
1012 | OVS_FLOW_CMD_NEW, |
1013 | ufid_flags); | |
6740b721 JR |
1014 | BUG_ON(error < 0); |
1015 | } | |
1016 | ovs_unlock(); | |
0c9fd022 | 1017 | |
6740b721 JR |
1018 | ovs_nla_free_flow_actions(old_acts); |
1019 | ovs_flow_free(new_flow, false); | |
0c9fd022 | 1020 | } |
6740b721 JR |
1021 | |
1022 | if (reply) | |
cb25142c | 1023 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
0c9fd022 JR |
1024 | return 0; |
1025 | ||
0c9fd022 JR |
1026 | err_unlock_ovs: |
1027 | ovs_unlock(); | |
6740b721 JR |
1028 | kfree_skb(reply); |
1029 | err_kfree_acts: | |
0c9fd022 | 1030 | kfree(acts); |
6740b721 JR |
1031 | err_kfree_flow: |
1032 | ovs_flow_free(new_flow, false); | |
0c9fd022 JR |
1033 | error: |
1034 | return error; | |
1035 | } | |
1036 | ||
cc561abf PS |
1037 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
1038 | static struct sw_flow_actions *get_flow_actions(const struct nlattr *a, | |
1039 | const struct sw_flow_key *key, | |
9233cef7 JR |
1040 | const struct sw_flow_mask *mask, |
1041 | bool log) | |
cc561abf PS |
1042 | { |
1043 | struct sw_flow_actions *acts; | |
1044 | struct sw_flow_key masked_key; | |
1045 | int error; | |
1046 | ||
1047 | ovs_flow_mask_key(&masked_key, key, mask); | |
9233cef7 | 1048 | error = ovs_nla_copy_actions(a, &masked_key, &acts, log); |
cc561abf | 1049 | if (error) { |
9233cef7 | 1050 | OVS_NLERR(log, |
7d16c847 | 1051 | "Actions may not be safe on all matching packets"); |
cc561abf PS |
1052 | return ERR_PTR(error); |
1053 | } | |
1054 | ||
1055 | return acts; | |
1056 | } | |
1057 | ||
0c9fd022 JR |
1058 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1059 | { | |
1060 | struct nlattr **a = info->attrs; | |
1061 | struct ovs_header *ovs_header = info->userhdr; | |
1d2a1b5f | 1062 | struct sw_flow_key key; |
0c9fd022 JR |
1063 | struct sw_flow *flow; |
1064 | struct sw_flow_mask mask; | |
1065 | struct sk_buff *reply = NULL; | |
1066 | struct datapath *dp; | |
6740b721 | 1067 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
0c9fd022 | 1068 | struct sw_flow_match match; |
bc619e29 JS |
1069 | struct sw_flow_id sfid; |
1070 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
0c9fd022 | 1071 | int error; |
9233cef7 | 1072 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1073 | bool ufid_present; |
0c9fd022 JR |
1074 | |
1075 | /* Extract key. */ | |
1076 | error = -EINVAL; | |
a473df5b | 1077 | if (!a[OVS_FLOW_ATTR_KEY]) { |
9233cef7 | 1078 | OVS_NLERR(log, "Flow key attribute not present in set flow."); |
0c9fd022 | 1079 | goto error; |
a473df5b | 1080 | } |
0c9fd022 | 1081 | |
bc619e29 | 1082 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
0c9fd022 | 1083 | ovs_match_init(&match, &key, &mask); |
9233cef7 JR |
1084 | error = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], |
1085 | a[OVS_FLOW_ATTR_MASK], log); | |
0c9fd022 JR |
1086 | if (error) |
1087 | goto error; | |
d6569377 | 1088 | |
0c9fd022 JR |
1089 | /* Validate actions. */ |
1090 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
9233cef7 JR |
1091 | acts = get_flow_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, &mask, |
1092 | log); | |
cc561abf PS |
1093 | if (IS_ERR(acts)) { |
1094 | error = PTR_ERR(acts); | |
0c9fd022 | 1095 | goto error; |
6740b721 | 1096 | } |
6740b721 | 1097 | |
ff27161e | 1098 | /* Can allocate before locking if have acts. */ |
bc619e29 JS |
1099 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1100 | ufid_flags); | |
6740b721 JR |
1101 | if (IS_ERR(reply)) { |
1102 | error = PTR_ERR(reply); | |
1103 | goto err_kfree_acts; | |
90b8c2f7 | 1104 | } |
0c9fd022 JR |
1105 | } |
1106 | ||
1107 | ovs_lock(); | |
1108 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
6740b721 JR |
1109 | if (unlikely(!dp)) { |
1110 | error = -ENODEV; | |
0c9fd022 | 1111 | goto err_unlock_ovs; |
6740b721 | 1112 | } |
0c9fd022 | 1113 | /* Check that the flow exists. */ |
bc619e29 JS |
1114 | if (ufid_present) |
1115 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1116 | else | |
1117 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
6740b721 JR |
1118 | if (unlikely(!flow)) { |
1119 | error = -ENOENT; | |
0c9fd022 | 1120 | goto err_unlock_ovs; |
6740b721 | 1121 | } |
3440e4bc | 1122 | |
0c9fd022 | 1123 | /* Update actions, if present. */ |
6740b721 | 1124 | if (likely(acts)) { |
0c9fd022 JR |
1125 | old_acts = ovsl_dereference(flow->sf_acts); |
1126 | rcu_assign_pointer(flow->sf_acts, acts); | |
6740b721 JR |
1127 | |
1128 | if (unlikely(reply)) { | |
2c622e5a | 1129 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1130 | ovs_header->dp_ifindex, |
1131 | reply, info->snd_portid, | |
1132 | info->snd_seq, 0, | |
bc619e29 JS |
1133 | OVS_FLOW_CMD_NEW, |
1134 | ufid_flags); | |
6740b721 JR |
1135 | BUG_ON(error < 0); |
1136 | } | |
1137 | } else { | |
1138 | /* Could not alloc without acts before locking. */ | |
7d16c847 | 1139 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, |
bc619e29 JS |
1140 | info, OVS_FLOW_CMD_NEW, false, |
1141 | ufid_flags); | |
1142 | ||
6740b721 JR |
1143 | if (unlikely(IS_ERR(reply))) { |
1144 | error = PTR_ERR(reply); | |
1145 | goto err_unlock_ovs; | |
1146 | } | |
9c52546b | 1147 | } |
0c9fd022 | 1148 | |
0c9fd022 JR |
1149 | /* Clear stats. */ |
1150 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1151 | ovs_flow_stats_clear(flow); | |
cd2a59e9 | 1152 | ovs_unlock(); |
37a1300c | 1153 | |
6740b721 | 1154 | if (reply) |
cb25142c | 1155 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
6740b721 JR |
1156 | if (old_acts) |
1157 | ovs_nla_free_flow_actions(old_acts); | |
7d16c847 | 1158 | |
d6569377 | 1159 | return 0; |
704a1e09 | 1160 | |
cd2a59e9 PS |
1161 | err_unlock_ovs: |
1162 | ovs_unlock(); | |
6740b721 JR |
1163 | kfree_skb(reply); |
1164 | err_kfree_acts: | |
ba400435 | 1165 | kfree(acts); |
37a1300c | 1166 | error: |
9c52546b | 1167 | return error; |
704a1e09 BP |
1168 | } |
1169 | ||
df2c07f4 | 1170 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1171 | { |
37a1300c | 1172 | struct nlattr **a = info->attrs; |
df2c07f4 | 1173 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1174 | struct sw_flow_key key; |
37a1300c | 1175 | struct sk_buff *reply; |
704a1e09 | 1176 | struct sw_flow *flow; |
9c52546b | 1177 | struct datapath *dp; |
a1c564be | 1178 | struct sw_flow_match match; |
bc619e29 JS |
1179 | struct sw_flow_id ufid; |
1180 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1181 | int err = 0; | |
9233cef7 | 1182 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1183 | bool ufid_present; |
704a1e09 | 1184 | |
bc619e29 JS |
1185 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1186 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1187 | ovs_match_init(&match, &key, NULL); | |
1188 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL, | |
1189 | log); | |
1190 | } else if (!ufid_present) { | |
9233cef7 JR |
1191 | OVS_NLERR(log, |
1192 | "Flow get message rejected, Key attribute missing."); | |
bc619e29 | 1193 | err = -EINVAL; |
1b936472 | 1194 | } |
37a1300c BP |
1195 | if (err) |
1196 | return err; | |
704a1e09 | 1197 | |
cd2a59e9 | 1198 | ovs_lock(); |
2a4999f3 | 1199 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1200 | if (!dp) { |
1201 | err = -ENODEV; | |
1202 | goto unlock; | |
1203 | } | |
704a1e09 | 1204 | |
bc619e29 JS |
1205 | if (ufid_present) |
1206 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1207 | else | |
1208 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1209 | if (!flow) { |
cd2a59e9 PS |
1210 | err = -ENOENT; |
1211 | goto unlock; | |
1212 | } | |
d6569377 | 1213 | |
7d16c847 | 1214 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
bc619e29 | 1215 | OVS_FLOW_CMD_NEW, true, ufid_flags); |
cd2a59e9 PS |
1216 | if (IS_ERR(reply)) { |
1217 | err = PTR_ERR(reply); | |
1218 | goto unlock; | |
1219 | } | |
36956a7d | 1220 | |
cd2a59e9 | 1221 | ovs_unlock(); |
37a1300c | 1222 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1223 | unlock: |
1224 | ovs_unlock(); | |
1225 | return err; | |
d6569377 | 1226 | } |
9c52546b | 1227 | |
df2c07f4 | 1228 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1229 | { |
37a1300c | 1230 | struct nlattr **a = info->attrs; |
df2c07f4 | 1231 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1232 | struct sw_flow_key key; |
37a1300c | 1233 | struct sk_buff *reply; |
bc619e29 | 1234 | struct sw_flow *flow = NULL; |
d6569377 | 1235 | struct datapath *dp; |
a1c564be | 1236 | struct sw_flow_match match; |
bc619e29 JS |
1237 | struct sw_flow_id ufid; |
1238 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
d6569377 | 1239 | int err; |
9233cef7 | 1240 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1241 | bool ufid_present; |
36956a7d | 1242 | |
bc619e29 JS |
1243 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1244 | if (a[OVS_FLOW_ATTR_KEY]) { | |
cde7f3ba | 1245 | ovs_match_init(&match, &key, NULL); |
9233cef7 JR |
1246 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL, |
1247 | log); | |
cde7f3ba JR |
1248 | if (unlikely(err)) |
1249 | return err; | |
1250 | } | |
1251 | ||
cd2a59e9 | 1252 | ovs_lock(); |
2a4999f3 | 1253 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cde7f3ba | 1254 | if (unlikely(!dp)) { |
cd2a59e9 PS |
1255 | err = -ENODEV; |
1256 | goto unlock; | |
1257 | } | |
7d16c847 | 1258 | |
bc619e29 | 1259 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
994dc286 | 1260 | err = ovs_flow_tbl_flush(&dp->table); |
cd2a59e9 PS |
1261 | goto unlock; |
1262 | } | |
7d16c847 | 1263 | |
bc619e29 JS |
1264 | if (ufid_present) |
1265 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1266 | else | |
1267 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1268 | if (unlikely(!flow)) { |
cd2a59e9 PS |
1269 | err = -ENOENT; |
1270 | goto unlock; | |
1271 | } | |
d6569377 | 1272 | |
994dc286 | 1273 | ovs_flow_tbl_remove(&dp->table, flow); |
cde7f3ba | 1274 | ovs_unlock(); |
37a1300c | 1275 | |
46051cf8 | 1276 | reply = ovs_flow_cmd_alloc_info(rcu_dereference_raw(flow->sf_acts), |
bc619e29 | 1277 | &flow->id, info, false, ufid_flags); |
cde7f3ba JR |
1278 | |
1279 | if (likely(reply)) { | |
1280 | if (likely(!IS_ERR(reply))) { | |
7d16c847 PS |
1281 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1282 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
cde7f3ba JR |
1283 | reply, info->snd_portid, |
1284 | info->snd_seq, 0, | |
bc619e29 JS |
1285 | OVS_FLOW_CMD_DEL, |
1286 | ufid_flags); | |
cde7f3ba JR |
1287 | rcu_read_unlock(); |
1288 | BUG_ON(err < 0); | |
cb25142c | 1289 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
cde7f3ba | 1290 | } else { |
cb25142c PS |
1291 | genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0, |
1292 | GROUP_ID(&ovs_dp_flow_multicast_group), PTR_ERR(reply)); | |
1293 | ||
cde7f3ba | 1294 | } |
afad3556 | 1295 | } |
37a1300c | 1296 | |
a1c564be | 1297 | ovs_flow_free(flow, true); |
37a1300c | 1298 | return 0; |
cd2a59e9 PS |
1299 | unlock: |
1300 | ovs_unlock(); | |
1301 | return err; | |
37a1300c BP |
1302 | } |
1303 | ||
df2c07f4 | 1304 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1305 | { |
bc619e29 | 1306 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
df2c07f4 | 1307 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
994dc286 | 1308 | struct table_instance *ti; |
37a1300c | 1309 | struct datapath *dp; |
bc619e29 JS |
1310 | u32 ufid_flags; |
1311 | int err; | |
1312 | ||
1313 | err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a, | |
1314 | OVS_FLOW_ATTR_MAX, flow_policy); | |
1315 | if (err) | |
1316 | return err; | |
1317 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
37a1300c | 1318 | |
f44ccce1 | 1319 | rcu_read_lock(); |
01ac0970 | 1320 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 1321 | if (!dp) { |
f44ccce1 | 1322 | rcu_read_unlock(); |
37a1300c | 1323 | return -ENODEV; |
cd2a59e9 | 1324 | } |
37a1300c | 1325 | |
994dc286 | 1326 | ti = rcu_dereference(dp->table.ti); |
37a1300c | 1327 | for (;;) { |
37a1300c BP |
1328 | struct sw_flow *flow; |
1329 | u32 bucket, obj; | |
1330 | ||
1331 | bucket = cb->args[0]; | |
1332 | obj = cb->args[1]; | |
994dc286 | 1333 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
3544358a | 1334 | if (!flow) |
37a1300c BP |
1335 | break; |
1336 | ||
2c622e5a | 1337 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
28aea917 | 1338 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1339 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
bc619e29 | 1340 | OVS_FLOW_CMD_NEW, ufid_flags) < 0) |
37a1300c BP |
1341 | break; |
1342 | ||
1343 | cb->args[0] = bucket; | |
1344 | cb->args[1] = obj; | |
1345 | } | |
f44ccce1 | 1346 | rcu_read_unlock(); |
37a1300c | 1347 | return skb->len; |
704a1e09 BP |
1348 | } |
1349 | ||
cb25142c PS |
1350 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1351 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
9233cef7 | 1352 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
cb25142c PS |
1353 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1354 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
9233cef7 | 1355 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
bc619e29 JS |
1356 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1357 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
cb25142c PS |
1358 | }; |
1359 | ||
37a1300c | 1360 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1361 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1362 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1363 | .policy = flow_policy, | |
0c9fd022 | 1364 | .doit = ovs_flow_cmd_new |
37a1300c | 1365 | }, |
df2c07f4 | 1366 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1367 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1368 | .policy = flow_policy, | |
df2c07f4 | 1369 | .doit = ovs_flow_cmd_del |
37a1300c | 1370 | }, |
df2c07f4 | 1371 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1372 | .flags = 0, /* OK for unprivileged users. */ |
1373 | .policy = flow_policy, | |
df2c07f4 JP |
1374 | .doit = ovs_flow_cmd_get, |
1375 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1376 | }, |
df2c07f4 | 1377 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1378 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1379 | .policy = flow_policy, | |
0c9fd022 | 1380 | .doit = ovs_flow_cmd_set, |
37a1300c BP |
1381 | }, |
1382 | }; | |
1383 | ||
cb25142c | 1384 | static struct genl_family dp_flow_genl_family = { |
aaff4b55 | 1385 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1386 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1387 | .name = OVS_FLOW_FAMILY, |
1388 | .version = OVS_FLOW_VERSION, | |
1389 | .maxattr = OVS_FLOW_ATTR_MAX, | |
b3dcb73c | 1390 | .netnsok = true, |
cb25142c PS |
1391 | .parallel_ops = true, |
1392 | .ops = dp_flow_genl_ops, | |
1393 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1394 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1395 | .n_mcgrps = 1, | |
aaff4b55 BP |
1396 | }; |
1397 | ||
0afa2373 TG |
1398 | static size_t ovs_dp_cmd_msg_size(void) |
1399 | { | |
1400 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1401 | ||
1402 | msgsize += nla_total_size(IFNAMSIZ); | |
1403 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
4fa72a95 | 1404 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
300af20a | 1405 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
0afa2373 TG |
1406 | |
1407 | return msgsize; | |
1408 | } | |
1409 | ||
d637497c | 1410 | /* Called with ovs_mutex. */ |
df2c07f4 | 1411 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1412 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1413 | { |
df2c07f4 | 1414 | struct ovs_header *ovs_header; |
e926dfe3 | 1415 | struct ovs_dp_stats dp_stats; |
4fa72a95 | 1416 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
064af421 BP |
1417 | int err; |
1418 | ||
28aea917 | 1419 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1420 | flags, cmd); |
df2c07f4 | 1421 | if (!ovs_header) |
aaff4b55 | 1422 | goto error; |
064af421 | 1423 | |
b063d9f0 | 1424 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1425 | |
850b6b3b | 1426 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
064af421 | 1427 | if (err) |
d6569377 | 1428 | goto nla_put_failure; |
064af421 | 1429 | |
4fa72a95 AZ |
1430 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1431 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1432 | &dp_stats)) | |
1433 | goto nla_put_failure; | |
1434 | ||
1435 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1436 | sizeof(struct ovs_dp_megaflow_stats), | |
1437 | &dp_megaflow_stats)) | |
c3cc8c03 | 1438 | goto nla_put_failure; |
d6569377 | 1439 | |
c58cc9a4 TG |
1440 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1441 | goto nla_put_failure; | |
1442 | ||
23b48dc1 TG |
1443 | genlmsg_end(skb, ovs_header); |
1444 | return 0; | |
d6569377 BP |
1445 | |
1446 | nla_put_failure: | |
df2c07f4 | 1447 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1448 | error: |
1449 | return -EMSGSIZE; | |
d6569377 BP |
1450 | } |
1451 | ||
d81eef1b | 1452 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
d6569377 | 1453 | { |
d81eef1b | 1454 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
aaff4b55 | 1455 | } |
9dca7bd5 | 1456 | |
aa917006 | 1457 | /* Called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 1458 | static struct datapath *lookup_datapath(struct net *net, |
f1f60b85 | 1459 | const struct ovs_header *ovs_header, |
6455100f | 1460 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1461 | { |
254f2dc8 BP |
1462 | struct datapath *dp; |
1463 | ||
df2c07f4 | 1464 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1465 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1466 | else { |
d6569377 | 1467 | struct vport *vport; |
d6569377 | 1468 | |
2a4999f3 | 1469 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1470 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
d6569377 | 1471 | } |
254f2dc8 | 1472 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1473 | } |
1474 | ||
94358dcf TG |
1475 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1476 | { | |
1477 | struct datapath *dp; | |
1478 | ||
1479 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
09350a3d | 1480 | if (IS_ERR(dp)) |
94358dcf TG |
1481 | return; |
1482 | ||
1483 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1484 | dp->user_features = 0; | |
1485 | } | |
1486 | ||
f1f60b85 | 1487 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
c58cc9a4 TG |
1488 | { |
1489 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1490 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1491 | } | |
1492 | ||
df2c07f4 | 1493 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1494 | { |
aaff4b55 | 1495 | struct nlattr **a = info->attrs; |
d6569377 | 1496 | struct vport_parms parms; |
aaff4b55 | 1497 | struct sk_buff *reply; |
d6569377 BP |
1498 | struct datapath *dp; |
1499 | struct vport *vport; | |
2a4999f3 | 1500 | struct ovs_net *ovs_net; |
95b1d73a | 1501 | int err, i; |
d6569377 | 1502 | |
d6569377 | 1503 | err = -EINVAL; |
ea36840f | 1504 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1505 | goto err; |
1506 | ||
d81eef1b JR |
1507 | reply = ovs_dp_cmd_alloc_info(info); |
1508 | if (!reply) | |
1509 | return -ENOMEM; | |
d6569377 | 1510 | |
d6569377 BP |
1511 | err = -ENOMEM; |
1512 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1513 | if (dp == NULL) | |
d81eef1b | 1514 | goto err_free_reply; |
2a4999f3 | 1515 | |
0ceaa66c JG |
1516 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1517 | ||
d6569377 | 1518 | /* Allocate table. */ |
994dc286 PS |
1519 | err = ovs_flow_tbl_init(&dp->table); |
1520 | if (err) | |
d6569377 BP |
1521 | goto err_free_dp; |
1522 | ||
08fb1bbd | 1523 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
99769a40 JG |
1524 | if (!dp->stats_percpu) { |
1525 | err = -ENOMEM; | |
1526 | goto err_destroy_table; | |
1527 | } | |
1528 | ||
95b1d73a PS |
1529 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1530 | GFP_KERNEL); | |
1531 | if (!dp->ports) { | |
1532 | err = -ENOMEM; | |
1533 | goto err_destroy_percpu; | |
1534 | } | |
1535 | ||
1536 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1537 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1538 | ||
d6569377 | 1539 | /* Set up our datapath device. */ |
df2c07f4 JP |
1540 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1541 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1542 | parms.options = NULL; |
1543 | parms.dp = dp; | |
df2c07f4 | 1544 | parms.port_no = OVSP_LOCAL; |
beb1c69a | 1545 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
b063d9f0 | 1546 | |
c58cc9a4 TG |
1547 | ovs_dp_change(dp, a); |
1548 | ||
d81eef1b JR |
1549 | /* So far only local changes have been made, now need the lock. */ |
1550 | ovs_lock(); | |
1551 | ||
d6569377 BP |
1552 | vport = new_vport(&parms); |
1553 | if (IS_ERR(vport)) { | |
1554 | err = PTR_ERR(vport); | |
1555 | if (err == -EBUSY) | |
1556 | err = -EEXIST; | |
1557 | ||
94358dcf TG |
1558 | if (err == -EEXIST) { |
1559 | /* An outdated user space instance that does not understand | |
1560 | * the concept of user_features has attempted to create a new | |
1561 | * datapath and is likely to reuse it. Drop all user features. | |
1562 | */ | |
1563 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1564 | ovs_dp_reset_user_features(skb, info); | |
1565 | } | |
1566 | ||
95b1d73a | 1567 | goto err_destroy_ports_array; |
d6569377 | 1568 | } |
d6569377 | 1569 | |
d81eef1b JR |
1570 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1571 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1572 | BUG_ON(err < 0); | |
aaff4b55 | 1573 | |
2a4999f3 | 1574 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1575 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
cd2a59e9 | 1576 | ovs_unlock(); |
d6569377 | 1577 | |
cb25142c | 1578 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
d6569377 BP |
1579 | return 0; |
1580 | ||
95b1d73a | 1581 | err_destroy_ports_array: |
d81eef1b | 1582 | ovs_unlock(); |
95b1d73a | 1583 | kfree(dp->ports); |
99769a40 JG |
1584 | err_destroy_percpu: |
1585 | free_percpu(dp->stats_percpu); | |
d6569377 | 1586 | err_destroy_table: |
e379e4d1 | 1587 | ovs_flow_tbl_destroy(&dp->table); |
d6569377 | 1588 | err_free_dp: |
0ceaa66c | 1589 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1590 | kfree(dp); |
d81eef1b JR |
1591 | err_free_reply: |
1592 | kfree_skb(reply); | |
d6569377 | 1593 | err: |
064af421 BP |
1594 | return err; |
1595 | } | |
1596 | ||
cd2a59e9 | 1597 | /* Called with ovs_mutex. */ |
2a4999f3 | 1598 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1599 | { |
95b1d73a | 1600 | int i; |
44e05eca | 1601 | |
95b1d73a PS |
1602 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1603 | struct vport *vport; | |
f8dfbcb7 | 1604 | struct hlist_node *n; |
95b1d73a | 1605 | |
f8dfbcb7 | 1606 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1607 | if (vport->port_no != OVSP_LOCAL) |
1608 | ovs_dp_detach_port(vport); | |
1609 | } | |
ed099e92 | 1610 | |
fb93e9aa | 1611 | list_del_rcu(&dp->list_node); |
ed099e92 | 1612 | |
cd2a59e9 | 1613 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
d103f479 AZ |
1614 | * all ports in datapath are destroyed first before freeing datapath. |
1615 | */ | |
cd2a59e9 | 1616 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
99620d2c | 1617 | |
d103f479 | 1618 | /* RCU destroy the flow table */ |
ed099e92 | 1619 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1620 | } |
1621 | ||
1622 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1623 | { | |
1624 | struct sk_buff *reply; | |
1625 | struct datapath *dp; | |
1626 | int err; | |
1627 | ||
d81eef1b JR |
1628 | reply = ovs_dp_cmd_alloc_info(info); |
1629 | if (!reply) | |
1630 | return -ENOMEM; | |
1631 | ||
cd2a59e9 | 1632 | ovs_lock(); |
2a4999f3 PS |
1633 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1634 | err = PTR_ERR(dp); | |
1635 | if (IS_ERR(dp)) | |
d81eef1b | 1636 | goto err_unlock_free; |
2a4999f3 | 1637 | |
d81eef1b JR |
1638 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1639 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1640 | BUG_ON(err < 0); | |
2a4999f3 PS |
1641 | |
1642 | __dp_destroy(dp); | |
d81eef1b | 1643 | ovs_unlock(); |
7d16c847 | 1644 | |
cb25142c | 1645 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
99620d2c | 1646 | return 0; |
d81eef1b JR |
1647 | |
1648 | err_unlock_free: | |
cd2a59e9 | 1649 | ovs_unlock(); |
d81eef1b | 1650 | kfree_skb(reply); |
cd2a59e9 | 1651 | return err; |
44e05eca BP |
1652 | } |
1653 | ||
df2c07f4 | 1654 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1655 | { |
aaff4b55 | 1656 | struct sk_buff *reply; |
d6569377 | 1657 | struct datapath *dp; |
d6569377 | 1658 | int err; |
064af421 | 1659 | |
d81eef1b JR |
1660 | reply = ovs_dp_cmd_alloc_info(info); |
1661 | if (!reply) | |
1662 | return -ENOMEM; | |
1663 | ||
cd2a59e9 | 1664 | ovs_lock(); |
2a4999f3 | 1665 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1666 | err = PTR_ERR(dp); |
d6569377 | 1667 | if (IS_ERR(dp)) |
d81eef1b | 1668 | goto err_unlock_free; |
38c6ecbc | 1669 | |
c58cc9a4 TG |
1670 | ovs_dp_change(dp, info->attrs); |
1671 | ||
d81eef1b JR |
1672 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1673 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1674 | BUG_ON(err < 0); | |
cd2a59e9 | 1675 | ovs_unlock(); |
7d16c847 | 1676 | |
cb25142c | 1677 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
aaff4b55 | 1678 | return 0; |
d81eef1b JR |
1679 | |
1680 | err_unlock_free: | |
cd2a59e9 | 1681 | ovs_unlock(); |
d81eef1b | 1682 | kfree_skb(reply); |
cd2a59e9 | 1683 | return err; |
064af421 BP |
1684 | } |
1685 | ||
df2c07f4 | 1686 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1687 | { |
aaff4b55 | 1688 | struct sk_buff *reply; |
d6569377 | 1689 | struct datapath *dp; |
d6569377 | 1690 | int err; |
1dcf111b | 1691 | |
d81eef1b JR |
1692 | reply = ovs_dp_cmd_alloc_info(info); |
1693 | if (!reply) | |
1694 | return -ENOMEM; | |
1695 | ||
d637497c | 1696 | ovs_lock(); |
2a4999f3 | 1697 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1698 | if (IS_ERR(dp)) { |
1699 | err = PTR_ERR(dp); | |
d81eef1b | 1700 | goto err_unlock_free; |
cd2a59e9 | 1701 | } |
d81eef1b JR |
1702 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1703 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1704 | BUG_ON(err < 0); | |
d637497c | 1705 | ovs_unlock(); |
aaff4b55 BP |
1706 | |
1707 | return genlmsg_reply(reply, info); | |
cd2a59e9 | 1708 | |
d81eef1b | 1709 | err_unlock_free: |
d637497c | 1710 | ovs_unlock(); |
d81eef1b | 1711 | kfree_skb(reply); |
cd2a59e9 | 1712 | return err; |
1dcf111b JP |
1713 | } |
1714 | ||
df2c07f4 | 1715 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1716 | { |
2a4999f3 | 1717 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1718 | struct datapath *dp; |
1719 | int skip = cb->args[0]; | |
1720 | int i = 0; | |
a7786963 | 1721 | |
d637497c PS |
1722 | ovs_lock(); |
1723 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1724 | if (i >= skip && |
28aea917 | 1725 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1726 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1727 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1728 | break; |
254f2dc8 | 1729 | i++; |
a7786963 | 1730 | } |
d637497c | 1731 | ovs_unlock(); |
aaff4b55 | 1732 | |
254f2dc8 BP |
1733 | cb->args[0] = i; |
1734 | ||
aaff4b55 | 1735 | return skb->len; |
c19e6535 BP |
1736 | } |
1737 | ||
cb25142c PS |
1738 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1739 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1740 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1741 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1742 | }; | |
1743 | ||
aaff4b55 | 1744 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1745 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1746 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1747 | .policy = datapath_policy, | |
df2c07f4 | 1748 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1749 | }, |
df2c07f4 | 1750 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1751 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1752 | .policy = datapath_policy, | |
df2c07f4 | 1753 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1754 | }, |
df2c07f4 | 1755 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1756 | .flags = 0, /* OK for unprivileged users. */ |
1757 | .policy = datapath_policy, | |
df2c07f4 JP |
1758 | .doit = ovs_dp_cmd_get, |
1759 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1760 | }, |
df2c07f4 | 1761 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1762 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1763 | .policy = datapath_policy, | |
df2c07f4 | 1764 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1765 | }, |
1766 | }; | |
1767 | ||
cb25142c | 1768 | static struct genl_family dp_datapath_genl_family = { |
f0fef760 | 1769 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1770 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1771 | .name = OVS_DATAPATH_FAMILY, |
1772 | .version = OVS_DATAPATH_VERSION, | |
1773 | .maxattr = OVS_DP_ATTR_MAX, | |
b3dcb73c | 1774 | .netnsok = true, |
cb25142c PS |
1775 | .parallel_ops = true, |
1776 | .ops = dp_datapath_genl_ops, | |
1777 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1778 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1779 | .n_mcgrps = 1, | |
f0fef760 BP |
1780 | }; |
1781 | ||
cd2a59e9 | 1782 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1783 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1784 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1785 | { |
df2c07f4 | 1786 | struct ovs_header *ovs_header; |
e926dfe3 | 1787 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1788 | int err; |
1789 | ||
28aea917 | 1790 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1791 | flags, cmd); |
df2c07f4 | 1792 | if (!ovs_header) |
f0fef760 | 1793 | return -EMSGSIZE; |
c19e6535 | 1794 | |
99769a40 | 1795 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1796 | |
c3cc8c03 DM |
1797 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1798 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
beb1c69a | 1799 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport))) |
c3cc8c03 | 1800 | goto nla_put_failure; |
c19e6535 | 1801 | |
850b6b3b | 1802 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1803 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1804 | &vport_stats)) | |
1805 | goto nla_put_failure; | |
c19e6535 | 1806 | |
beb1c69a AW |
1807 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1808 | goto nla_put_failure; | |
1809 | ||
850b6b3b | 1810 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1811 | if (err == -EMSGSIZE) |
1812 | goto error; | |
c19e6535 | 1813 | |
23b48dc1 TG |
1814 | genlmsg_end(skb, ovs_header); |
1815 | return 0; | |
c19e6535 BP |
1816 | |
1817 | nla_put_failure: | |
1818 | err = -EMSGSIZE; | |
f0fef760 | 1819 | error: |
df2c07f4 | 1820 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1821 | return err; |
064af421 BP |
1822 | } |
1823 | ||
d81eef1b JR |
1824 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1825 | { | |
1826 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1827 | } | |
1828 | ||
1829 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
28aea917 | 1830 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 1831 | u32 seq, u8 cmd) |
064af421 | 1832 | { |
c19e6535 | 1833 | struct sk_buff *skb; |
f0fef760 | 1834 | int retval; |
c19e6535 | 1835 | |
f0fef760 | 1836 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1837 | if (!skb) |
1838 | return ERR_PTR(-ENOMEM); | |
1839 | ||
28aea917 | 1840 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
1841 | BUG_ON(retval < 0); |
1842 | ||
c19e6535 | 1843 | return skb; |
f0fef760 | 1844 | } |
c19e6535 | 1845 | |
cd2a59e9 | 1846 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 | 1847 | static struct vport *lookup_vport(struct net *net, |
f1f60b85 | 1848 | const struct ovs_header *ovs_header, |
df2c07f4 | 1849 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1850 | { |
1851 | struct datapath *dp; | |
1852 | struct vport *vport; | |
1853 | ||
df2c07f4 | 1854 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1855 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1856 | if (!vport) |
c19e6535 | 1857 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1858 | if (ovs_header->dp_ifindex && |
1859 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1860 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1861 | return vport; |
df2c07f4 JP |
1862 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1863 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1864 | |
1865 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1866 | return ERR_PTR(-EFBIG); |
c19e6535 | 1867 | |
2a4999f3 | 1868 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1869 | if (!dp) |
1870 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1871 | |
cd2a59e9 | 1872 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 1873 | if (!vport) |
17535c57 | 1874 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1875 | return vport; |
1876 | } else | |
1877 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1878 | } |
1879 | ||
df2c07f4 | 1880 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1881 | { |
f0fef760 | 1882 | struct nlattr **a = info->attrs; |
df2c07f4 | 1883 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1884 | struct vport_parms parms; |
ed099e92 | 1885 | struct sk_buff *reply; |
c19e6535 | 1886 | struct vport *vport; |
c19e6535 | 1887 | struct datapath *dp; |
b0ec0f27 | 1888 | u32 port_no; |
c19e6535 | 1889 | int err; |
b0ec0f27 | 1890 | |
ea36840f BP |
1891 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1892 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
d81eef1b JR |
1893 | return -EINVAL; |
1894 | ||
1895 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1896 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1897 | if (port_no >= DP_MAX_PORTS) | |
1898 | return -EFBIG; | |
1899 | ||
1900 | reply = ovs_vport_cmd_alloc_info(); | |
1901 | if (!reply) | |
1902 | return -ENOMEM; | |
f0fef760 | 1903 | |
cd2a59e9 | 1904 | ovs_lock(); |
5a38795f | 1905 | restart: |
2a4999f3 | 1906 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1907 | err = -ENODEV; |
1908 | if (!dp) | |
d81eef1b | 1909 | goto exit_unlock_free; |
c19e6535 | 1910 | |
d81eef1b | 1911 | if (port_no) { |
cd2a59e9 | 1912 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1913 | err = -EBUSY; |
1914 | if (vport) | |
d81eef1b | 1915 | goto exit_unlock_free; |
c19e6535 BP |
1916 | } else { |
1917 | for (port_no = 1; ; port_no++) { | |
1918 | if (port_no >= DP_MAX_PORTS) { | |
1919 | err = -EFBIG; | |
d81eef1b | 1920 | goto exit_unlock_free; |
c19e6535 | 1921 | } |
cd2a59e9 | 1922 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1923 | if (!vport) |
1924 | break; | |
51d4d598 | 1925 | } |
064af421 | 1926 | } |
b0ec0f27 | 1927 | |
df2c07f4 JP |
1928 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1929 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1930 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1931 | parms.dp = dp; |
1932 | parms.port_no = port_no; | |
beb1c69a | 1933 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
c19e6535 BP |
1934 | |
1935 | vport = new_vport(&parms); | |
1936 | err = PTR_ERR(vport); | |
5a38795f TG |
1937 | if (IS_ERR(vport)) { |
1938 | if (err == -EAGAIN) | |
1939 | goto restart; | |
d81eef1b | 1940 | goto exit_unlock_free; |
5a38795f | 1941 | } |
c19e6535 | 1942 | |
d81eef1b JR |
1943 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1944 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1945 | BUG_ON(err < 0); | |
1946 | ovs_unlock(); | |
e297c6b7 | 1947 | |
cb25142c | 1948 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 1949 | return 0; |
c19e6535 | 1950 | |
d81eef1b | 1951 | exit_unlock_free: |
cd2a59e9 | 1952 | ovs_unlock(); |
d81eef1b | 1953 | kfree_skb(reply); |
c19e6535 | 1954 | return err; |
44e05eca BP |
1955 | } |
1956 | ||
df2c07f4 | 1957 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1958 | { |
f0fef760 BP |
1959 | struct nlattr **a = info->attrs; |
1960 | struct sk_buff *reply; | |
c19e6535 | 1961 | struct vport *vport; |
c19e6535 | 1962 | int err; |
44e05eca | 1963 | |
d81eef1b JR |
1964 | reply = ovs_vport_cmd_alloc_info(); |
1965 | if (!reply) | |
1966 | return -ENOMEM; | |
1967 | ||
cd2a59e9 | 1968 | ovs_lock(); |
2a4999f3 | 1969 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
1970 | err = PTR_ERR(vport); |
1971 | if (IS_ERR(vport)) | |
d81eef1b | 1972 | goto exit_unlock_free; |
44e05eca | 1973 | |
6455100f | 1974 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 1975 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 1976 | err = -EINVAL; |
d81eef1b | 1977 | goto exit_unlock_free; |
c25ea534 JG |
1978 | } |
1979 | ||
17ec1d04 | 1980 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 1981 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 | 1982 | if (err) |
d81eef1b | 1983 | goto exit_unlock_free; |
17ec1d04 | 1984 | } |
1fc7083d | 1985 | |
beb1c69a | 1986 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { |
7d16c847 PS |
1987 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
1988 | ||
1989 | err = ovs_vport_set_upcall_portids(vport, ids); | |
beb1c69a AW |
1990 | if (err) |
1991 | goto exit_unlock_free; | |
1992 | } | |
c19e6535 | 1993 | |
c25ea534 JG |
1994 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1995 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1996 | BUG_ON(err < 0); | |
cd2a59e9 | 1997 | ovs_unlock(); |
d81eef1b | 1998 | |
cb25142c | 1999 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
c25ea534 JG |
2000 | return 0; |
2001 | ||
d81eef1b | 2002 | exit_unlock_free: |
cd2a59e9 | 2003 | ovs_unlock(); |
d81eef1b | 2004 | kfree_skb(reply); |
c19e6535 | 2005 | return err; |
064af421 BP |
2006 | } |
2007 | ||
df2c07f4 | 2008 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2009 | { |
f0fef760 BP |
2010 | struct nlattr **a = info->attrs; |
2011 | struct sk_buff *reply; | |
c19e6535 | 2012 | struct vport *vport; |
c19e6535 BP |
2013 | int err; |
2014 | ||
d81eef1b JR |
2015 | reply = ovs_vport_cmd_alloc_info(); |
2016 | if (!reply) | |
2017 | return -ENOMEM; | |
2018 | ||
cd2a59e9 | 2019 | ovs_lock(); |
2a4999f3 | 2020 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 2021 | err = PTR_ERR(vport); |
f0fef760 | 2022 | if (IS_ERR(vport)) |
d81eef1b | 2023 | goto exit_unlock_free; |
c19e6535 | 2024 | |
df2c07f4 | 2025 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 | 2026 | err = -EINVAL; |
d81eef1b | 2027 | goto exit_unlock_free; |
f0fef760 BP |
2028 | } |
2029 | ||
d81eef1b JR |
2030 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2031 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
2032 | BUG_ON(err < 0); | |
850b6b3b | 2033 | ovs_dp_detach_port(vport); |
d81eef1b | 2034 | ovs_unlock(); |
f0fef760 | 2035 | |
cb25142c | 2036 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 2037 | return 0; |
f0fef760 | 2038 | |
d81eef1b | 2039 | exit_unlock_free: |
cd2a59e9 | 2040 | ovs_unlock(); |
d81eef1b | 2041 | kfree_skb(reply); |
c19e6535 | 2042 | return err; |
7c40efc9 BP |
2043 | } |
2044 | ||
df2c07f4 | 2045 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2046 | { |
f0fef760 | 2047 | struct nlattr **a = info->attrs; |
df2c07f4 | 2048 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 2049 | struct sk_buff *reply; |
c19e6535 | 2050 | struct vport *vport; |
c19e6535 BP |
2051 | int err; |
2052 | ||
d81eef1b JR |
2053 | reply = ovs_vport_cmd_alloc_info(); |
2054 | if (!reply) | |
2055 | return -ENOMEM; | |
2056 | ||
ed099e92 | 2057 | rcu_read_lock(); |
2a4999f3 | 2058 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2059 | err = PTR_ERR(vport); |
2060 | if (IS_ERR(vport)) | |
d81eef1b JR |
2061 | goto exit_unlock_free; |
2062 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
2063 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2064 | BUG_ON(err < 0); | |
df2fa9b5 JG |
2065 | rcu_read_unlock(); |
2066 | ||
2067 | return genlmsg_reply(reply, info); | |
ed099e92 | 2068 | |
d81eef1b | 2069 | exit_unlock_free: |
ed099e92 | 2070 | rcu_read_unlock(); |
d81eef1b | 2071 | kfree_skb(reply); |
c19e6535 BP |
2072 | return err; |
2073 | } | |
2074 | ||
df2c07f4 | 2075 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2076 | { |
df2c07f4 | 2077 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2078 | struct datapath *dp; |
95b1d73a PS |
2079 | int bucket = cb->args[0], skip = cb->args[1]; |
2080 | int i, j = 0; | |
c19e6535 | 2081 | |
03fc2881 | 2082 | rcu_read_lock(); |
01ac0970 | 2083 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
03fc2881 JR |
2084 | if (!dp) { |
2085 | rcu_read_unlock(); | |
f0fef760 | 2086 | return -ENODEV; |
03fc2881 | 2087 | } |
95b1d73a | 2088 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2089 | struct vport *vport; |
95b1d73a PS |
2090 | |
2091 | j = 0; | |
f8dfbcb7 | 2092 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2093 | if (j >= skip && |
2094 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 2095 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2096 | cb->nlh->nlmsg_seq, |
2097 | NLM_F_MULTI, | |
2098 | OVS_VPORT_CMD_NEW) < 0) | |
2099 | goto out; | |
2100 | ||
2101 | j++; | |
2102 | } | |
2103 | skip = 0; | |
c19e6535 | 2104 | } |
95b1d73a | 2105 | out: |
ed099e92 | 2106 | rcu_read_unlock(); |
c19e6535 | 2107 | |
95b1d73a PS |
2108 | cb->args[0] = i; |
2109 | cb->args[1] = j; | |
f0fef760 | 2110 | |
95b1d73a | 2111 | return skb->len; |
7c40efc9 BP |
2112 | } |
2113 | ||
cb25142c PS |
2114 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2115 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2116 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2117 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2118 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2119 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2120 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2121 | }; | |
2122 | ||
f0fef760 | 2123 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2124 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
2125 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2126 | .policy = vport_policy, | |
df2c07f4 | 2127 | .doit = ovs_vport_cmd_new |
f0fef760 | 2128 | }, |
df2c07f4 | 2129 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
2130 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2131 | .policy = vport_policy, | |
df2c07f4 | 2132 | .doit = ovs_vport_cmd_del |
f0fef760 | 2133 | }, |
df2c07f4 | 2134 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2135 | .flags = 0, /* OK for unprivileged users. */ |
2136 | .policy = vport_policy, | |
df2c07f4 JP |
2137 | .doit = ovs_vport_cmd_get, |
2138 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2139 | }, |
df2c07f4 | 2140 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
2141 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2142 | .policy = vport_policy, | |
df2c07f4 | 2143 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2144 | }, |
2145 | }; | |
2146 | ||
cb25142c PS |
2147 | struct genl_family dp_vport_genl_family = { |
2148 | .id = GENL_ID_GENERATE, | |
2149 | .hdrsize = sizeof(struct ovs_header), | |
2150 | .name = OVS_VPORT_FAMILY, | |
2151 | .version = OVS_VPORT_VERSION, | |
2152 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2153 | .netnsok = true, | |
2154 | .parallel_ops = true, | |
2155 | .ops = dp_vport_genl_ops, | |
2156 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2157 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2158 | .n_mcgrps = 1, | |
982b8810 | 2159 | }; |
ed099e92 | 2160 | |
cb25142c PS |
2161 | static struct genl_family *dp_genl_families[] = { |
2162 | &dp_datapath_genl_family, | |
2163 | &dp_vport_genl_family, | |
2164 | &dp_flow_genl_family, | |
2165 | &dp_packet_genl_family, | |
982b8810 | 2166 | }; |
ed099e92 | 2167 | |
982b8810 BP |
2168 | static void dp_unregister_genl(int n_families) |
2169 | { | |
2170 | int i; | |
ed099e92 | 2171 | |
b867ca75 | 2172 | for (i = 0; i < n_families; i++) |
cb25142c | 2173 | genl_unregister_family(dp_genl_families[i]); |
ed099e92 BP |
2174 | } |
2175 | ||
982b8810 | 2176 | static int dp_register_genl(void) |
064af421 | 2177 | { |
982b8810 BP |
2178 | int err; |
2179 | int i; | |
064af421 | 2180 | |
982b8810 | 2181 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
064af421 | 2182 | |
cb25142c | 2183 | err = genl_register_family(dp_genl_families[i]); |
982b8810 BP |
2184 | if (err) |
2185 | goto error; | |
982b8810 | 2186 | } |
9cc8b4e4 | 2187 | |
982b8810 | 2188 | return 0; |
064af421 BP |
2189 | |
2190 | error: | |
cb25142c | 2191 | dp_unregister_genl(i); |
982b8810 | 2192 | return err; |
064af421 BP |
2193 | } |
2194 | ||
2a4999f3 PS |
2195 | static int __net_init ovs_init_net(struct net *net) |
2196 | { | |
2197 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2198 | ||
2199 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 2200 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
2a4999f3 PS |
2201 | return 0; |
2202 | } | |
2203 | ||
cabd5516 PS |
2204 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2205 | struct list_head *head) | |
2a4999f3 PS |
2206 | { |
2207 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
cabd5516 PS |
2208 | struct datapath *dp; |
2209 | ||
2210 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2211 | int i; | |
2212 | ||
2213 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2214 | struct vport *vport; | |
2215 | ||
2216 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
2217 | struct netdev_vport *netdev_vport; | |
2218 | ||
2219 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) | |
2220 | continue; | |
2221 | ||
2222 | netdev_vport = netdev_vport_priv(vport); | |
2223 | if (dev_net(netdev_vport->dev) == dnet) | |
2224 | list_add(&vport->detach_list, head); | |
2225 | } | |
2226 | } | |
2227 | } | |
2228 | } | |
2229 | ||
2230 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2231 | { | |
2232 | struct datapath *dp, *dp_next; | |
2233 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2234 | struct vport *vport, *vport_next; | |
2235 | struct net *net; | |
2236 | LIST_HEAD(head); | |
2a4999f3 | 2237 | |
cd2a59e9 PS |
2238 | ovs_lock(); |
2239 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2240 | __dp_destroy(dp); | |
cabd5516 PS |
2241 | |
2242 | rtnl_lock(); | |
2243 | for_each_net(net) | |
2244 | list_vports_from_net(net, dnet, &head); | |
2245 | rtnl_unlock(); | |
2246 | ||
2247 | /* Detach all vports from given namespace. */ | |
2248 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2249 | list_del(&vport->detach_list); | |
2250 | ovs_dp_detach_port(vport); | |
2251 | } | |
2252 | ||
cd2a59e9 PS |
2253 | ovs_unlock(); |
2254 | ||
2255 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
2256 | } |
2257 | ||
2258 | static struct pernet_operations ovs_net_ops = { | |
2259 | .init = ovs_init_net, | |
2260 | .exit = ovs_exit_net, | |
2261 | .id = &ovs_net_id, | |
2262 | .size = sizeof(struct ovs_net), | |
2263 | }; | |
2264 | ||
637c8268 PS |
2265 | DEFINE_COMPAT_PNET_REG_FUNC(device); |
2266 | ||
22d24ebf BP |
2267 | static int __init dp_init(void) |
2268 | { | |
2269 | int err; | |
2270 | ||
f3d85db3 | 2271 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2272 | |
dc5f3fef | 2273 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 2274 | VERSION); |
064af421 | 2275 | |
2c8c4fb7 | 2276 | err = action_fifos_init(); |
3544358a | 2277 | if (err) |
533e96e7 | 2278 | goto error; |
3544358a | 2279 | |
5282e284 | 2280 | err = ovs_internal_dev_rtnl_link_register(); |
2c8c4fb7 AZ |
2281 | if (err) |
2282 | goto error_action_fifos_exit; | |
2283 | ||
5282e284 TG |
2284 | err = ovs_flow_init(); |
2285 | if (err) | |
2286 | goto error_unreg_rtnl_link; | |
2287 | ||
850b6b3b | 2288 | err = ovs_vport_init(); |
064af421 BP |
2289 | if (err) |
2290 | goto error_flow_exit; | |
2291 | ||
2a4999f3 | 2292 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2293 | if (err) |
2294 | goto error_vport_exit; | |
2295 | ||
2a4999f3 PS |
2296 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2297 | if (err) | |
2298 | goto error_netns_exit; | |
2299 | ||
5a38795f TG |
2300 | err = ovs_netdev_init(); |
2301 | if (err) | |
2302 | goto error_unreg_notifier; | |
2303 | ||
982b8810 BP |
2304 | err = dp_register_genl(); |
2305 | if (err < 0) | |
5a38795f | 2306 | goto error_unreg_netdev; |
982b8810 | 2307 | |
064af421 BP |
2308 | return 0; |
2309 | ||
5a38795f TG |
2310 | error_unreg_netdev: |
2311 | ovs_netdev_exit(); | |
064af421 | 2312 | error_unreg_notifier: |
850b6b3b | 2313 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2314 | error_netns_exit: |
2315 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2316 | error_vport_exit: |
850b6b3b | 2317 | ovs_vport_exit(); |
064af421 | 2318 | error_flow_exit: |
850b6b3b | 2319 | ovs_flow_exit(); |
5282e284 TG |
2320 | error_unreg_rtnl_link: |
2321 | ovs_internal_dev_rtnl_link_unregister(); | |
2c8c4fb7 AZ |
2322 | error_action_fifos_exit: |
2323 | action_fifos_exit(); | |
064af421 BP |
2324 | error: |
2325 | return err; | |
2326 | } | |
2327 | ||
2328 | static void dp_cleanup(void) | |
2329 | { | |
982b8810 | 2330 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
5a38795f | 2331 | ovs_netdev_exit(); |
850b6b3b | 2332 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2333 | unregister_pernet_device(&ovs_net_ops); |
2334 | rcu_barrier(); | |
850b6b3b JG |
2335 | ovs_vport_exit(); |
2336 | ovs_flow_exit(); | |
5282e284 | 2337 | ovs_internal_dev_rtnl_link_unregister(); |
2c8c4fb7 | 2338 | action_fifos_exit(); |
064af421 BP |
2339 | } |
2340 | ||
2341 | module_init(dp_init); | |
2342 | module_exit(dp_cleanup); | |
2343 | ||
2344 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2345 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2346 | MODULE_VERSION(VERSION); |