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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> |
cd2a59e9 PS |
51 | #include <linux/genetlink.h> |
52 | #include <net/genetlink.h> | |
36956a7d | 53 | #include <net/genetlink.h> |
2a4999f3 PS |
54 | #include <net/net_namespace.h> |
55 | #include <net/netns/generic.h> | |
064af421 | 56 | |
064af421 | 57 | #include "datapath.h" |
064af421 | 58 | #include "flow.h" |
d103f479 | 59 | #include "flow_table.h" |
a097c0b2 | 60 | #include "flow_netlink.h" |
303708cc | 61 | #include "vlan.h" |
f2459fe7 | 62 | #include "vport-internal_dev.h" |
d5de5b0d | 63 | #include "vport-netdev.h" |
064af421 | 64 | |
2a4999f3 PS |
65 | int ovs_net_id __read_mostly; |
66 | ||
cb25142c PS |
67 | static struct genl_family dp_packet_genl_family; |
68 | static struct genl_family dp_flow_genl_family; | |
69 | static struct genl_family dp_datapath_genl_family; | |
70 | ||
71 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { | |
72 | .name = OVS_FLOW_MCGROUP | |
73 | }; | |
74 | ||
75 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { | |
76 | .name = OVS_DATAPATH_MCGROUP | |
77 | }; | |
78 | ||
79 | struct genl_multicast_group ovs_dp_vport_multicast_group = { | |
80 | .name = OVS_VPORT_MCGROUP | |
81 | }; | |
82 | ||
afad3556 JR |
83 | /* Check if need to build a reply message. |
84 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
85 | static bool ovs_must_notify(struct genl_info *info, | |
86 | const struct genl_multicast_group *grp) | |
87 | { | |
88 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
cb25142c | 89 | netlink_has_listeners(genl_info_net(info)->genl_sock, GROUP_ID(grp)); |
afad3556 JR |
90 | } |
91 | ||
cb25142c PS |
92 | static void ovs_notify(struct genl_family *family, struct genl_multicast_group *grp, |
93 | struct sk_buff *skb, struct genl_info *info) | |
e297c6b7 | 94 | { |
cb25142c PS |
95 | genl_notify(family, skb, genl_info_net(info), |
96 | info->snd_portid, GROUP_ID(grp), info->nlhdr, GFP_KERNEL); | |
e297c6b7 TG |
97 | } |
98 | ||
ed099e92 BP |
99 | /** |
100 | * DOC: Locking: | |
064af421 | 101 | * |
cd2a59e9 PS |
102 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
103 | * operations on vports, etc.), Writes to other state (flow table | |
104 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
105 | * by ovs_lock. | |
ed099e92 BP |
106 | * |
107 | * Reads are protected by RCU. | |
108 | * | |
109 | * There are a few special cases (mostly stats) that have their own | |
110 | * synchronization but they nest under all of above and don't interact with | |
111 | * each other. | |
cd2a59e9 PS |
112 | * |
113 | * The RTNL lock nests inside ovs_mutex. | |
064af421 | 114 | */ |
ed099e92 | 115 | |
cd2a59e9 PS |
116 | static DEFINE_MUTEX(ovs_mutex); |
117 | ||
118 | void ovs_lock(void) | |
119 | { | |
120 | mutex_lock(&ovs_mutex); | |
121 | } | |
122 | ||
123 | void ovs_unlock(void) | |
124 | { | |
125 | mutex_unlock(&ovs_mutex); | |
126 | } | |
127 | ||
128 | #ifdef CONFIG_LOCKDEP | |
129 | int lockdep_ovsl_is_held(void) | |
130 | { | |
131 | if (debug_locks) | |
132 | return lockdep_is_held(&ovs_mutex); | |
133 | else | |
134 | return 1; | |
135 | } | |
136 | #endif | |
137 | ||
5ae440c3 | 138 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
7257b535 | 139 | const struct dp_upcall_info *); |
5ae440c3 | 140 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
7257b535 | 141 | const struct dp_upcall_info *); |
064af421 | 142 | |
01ac0970 AZ |
143 | /* Must be called with rcu_read_lock. */ |
144 | static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex) | |
064af421 | 145 | { |
01ac0970 | 146 | struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex); |
ed099e92 | 147 | |
254f2dc8 | 148 | if (dev) { |
850b6b3b | 149 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 | 150 | if (vport) |
01ac0970 | 151 | return vport->dp; |
254f2dc8 | 152 | } |
01ac0970 AZ |
153 | |
154 | return NULL; | |
155 | } | |
156 | ||
157 | /* The caller must hold either ovs_mutex or rcu_read_lock to keep the | |
158 | * returned dp pointer valid. */ | |
159 | static inline struct datapath *get_dp(struct net *net, int dp_ifindex) | |
160 | { | |
161 | struct datapath *dp; | |
162 | ||
163 | WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); | |
164 | rcu_read_lock(); | |
165 | dp = get_dp_rcu(net, dp_ifindex); | |
254f2dc8 BP |
166 | rcu_read_unlock(); |
167 | ||
168 | return dp; | |
064af421 | 169 | } |
064af421 | 170 | |
cd2a59e9 | 171 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 172 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 173 | { |
cd2a59e9 | 174 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
16b82e84 | 175 | return vport->ops->get_name(vport); |
f2459fe7 JG |
176 | } |
177 | ||
99769a40 JG |
178 | static int get_dpifindex(struct datapath *dp) |
179 | { | |
180 | struct vport *local; | |
181 | int ifindex; | |
182 | ||
183 | rcu_read_lock(); | |
184 | ||
95b1d73a | 185 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 186 | if (local) |
d5de5b0d | 187 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
99769a40 JG |
188 | else |
189 | ifindex = 0; | |
190 | ||
191 | rcu_read_unlock(); | |
192 | ||
193 | return ifindex; | |
194 | } | |
195 | ||
46c6a11d JG |
196 | static void destroy_dp_rcu(struct rcu_head *rcu) |
197 | { | |
198 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 199 | |
e379e4d1 | 200 | ovs_flow_tbl_destroy(&dp->table); |
46c6a11d | 201 | free_percpu(dp->stats_percpu); |
2a4999f3 | 202 | release_net(ovs_dp_get_net(dp)); |
95b1d73a | 203 | kfree(dp->ports); |
5ca1ba48 | 204 | kfree(dp); |
46c6a11d JG |
205 | } |
206 | ||
95b1d73a PS |
207 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
208 | u16 port_no) | |
209 | { | |
210 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
211 | } | |
212 | ||
aa917006 | 213 | /* Called with ovs_mutex or RCU read lock. */ |
95b1d73a PS |
214 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
215 | { | |
216 | struct vport *vport; | |
95b1d73a PS |
217 | struct hlist_head *head; |
218 | ||
219 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 220 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
221 | if (vport->port_no == port_no) |
222 | return vport; | |
223 | } | |
224 | return NULL; | |
225 | } | |
226 | ||
cd2a59e9 | 227 | /* Called with ovs_mutex. */ |
c19e6535 | 228 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 229 | { |
f2459fe7 | 230 | struct vport *vport; |
f2459fe7 | 231 | |
850b6b3b | 232 | vport = ovs_vport_add(parms); |
c19e6535 BP |
233 | if (!IS_ERR(vport)) { |
234 | struct datapath *dp = parms->dp; | |
95b1d73a | 235 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 236 | |
95b1d73a | 237 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 238 | } |
c19e6535 | 239 | return vport; |
064af421 BP |
240 | } |
241 | ||
850b6b3b | 242 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 243 | { |
cd2a59e9 | 244 | ASSERT_OVSL(); |
064af421 | 245 | |
064af421 | 246 | /* First drop references to device. */ |
95b1d73a | 247 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 248 | |
7237e4f4 | 249 | /* Then destroy it. */ |
850b6b3b | 250 | ovs_vport_del(p); |
064af421 BP |
251 | } |
252 | ||
a6059080 | 253 | void ovs_dp_process_packet_with_key(struct sk_buff *skb, |
ca93abce AZ |
254 | struct sw_flow_key *pkt_key, |
255 | bool recirc) | |
064af421 | 256 | { |
a6059080 | 257 | const struct vport *p = OVS_CB(skb)->input_vport; |
064af421 | 258 | struct datapath *dp = p->dp; |
3544358a | 259 | struct sw_flow *flow; |
064af421 | 260 | struct dp_stats_percpu *stats; |
e9141eec | 261 | u64 *stats_counter; |
4fa72a95 | 262 | u32 n_mask_hit; |
064af421 | 263 | |
70dbc259 | 264 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 265 | |
52a23d92 | 266 | /* Look up flow. */ |
e2f3178f | 267 | flow = ovs_flow_tbl_lookup_stats(&dp->table, pkt_key, skb_get_hash(skb), |
5604935e | 268 | &n_mask_hit); |
52a23d92 JG |
269 | if (unlikely(!flow)) { |
270 | struct dp_upcall_info upcall; | |
271 | ||
272 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
a6059080 | 273 | upcall.key = pkt_key; |
52a23d92 | 274 | upcall.userdata = NULL; |
beb1c69a | 275 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
52a23d92 JG |
276 | ovs_dp_upcall(dp, skb, &upcall); |
277 | consume_skb(skb); | |
278 | stats_counter = &stats->n_missed; | |
279 | goto out; | |
280 | } | |
281 | ||
a6059080 | 282 | OVS_CB(skb)->pkt_key = pkt_key; |
52a23d92 JG |
283 | OVS_CB(skb)->flow = flow; |
284 | ||
a6059080 | 285 | ovs_flow_stats_update(OVS_CB(skb)->flow, pkt_key->tp.flags, skb); |
ca93abce | 286 | ovs_execute_actions(dp, skb, recirc); |
b0b906cc | 287 | stats_counter = &stats->n_hit; |
55574bb0 | 288 | |
8819fac7 | 289 | out: |
55574bb0 | 290 | /* Update datapath statistics. */ |
821cb9fa | 291 | u64_stats_update_begin(&stats->sync); |
e9141eec | 292 | (*stats_counter)++; |
4fa72a95 | 293 | stats->n_mask_hit += n_mask_hit; |
821cb9fa | 294 | u64_stats_update_end(&stats->sync); |
064af421 BP |
295 | } |
296 | ||
a6059080 | 297 | /* Must be called with rcu_read_lock. */ |
c450371e | 298 | void ovs_dp_process_received_packet(struct sk_buff *skb) |
a6059080 AZ |
299 | { |
300 | int error; | |
301 | struct sw_flow_key key; | |
302 | ||
a6059080 | 303 | /* Extract flow from 'skb' into 'key'. */ |
c450371e | 304 | error = ovs_flow_extract(skb, OVS_CB(skb)->input_vport->port_no, &key); |
a6059080 AZ |
305 | if (unlikely(error)) { |
306 | kfree_skb(skb); | |
307 | return; | |
308 | } | |
309 | ||
ca93abce | 310 | ovs_dp_process_packet_with_key(skb, &key, false); |
a6059080 AZ |
311 | } |
312 | ||
850b6b3b JG |
313 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
314 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc JG |
315 | { |
316 | struct dp_stats_percpu *stats; | |
317 | int err; | |
318 | ||
28aea917 | 319 | if (upcall_info->portid == 0) { |
b063d9f0 | 320 | err = -ENOTCONN; |
b063d9f0 JG |
321 | goto err; |
322 | } | |
323 | ||
7257b535 | 324 | if (!skb_is_gso(skb)) |
5ae440c3 | 325 | err = queue_userspace_packet(dp, skb, upcall_info); |
7257b535 | 326 | else |
5ae440c3 | 327 | err = queue_gso_packets(dp, skb, upcall_info); |
d76195db JG |
328 | if (err) |
329 | goto err; | |
330 | ||
331 | return 0; | |
aa5a8fdc | 332 | |
aa5a8fdc | 333 | err: |
70dbc259 | 334 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 335 | |
821cb9fa | 336 | u64_stats_update_begin(&stats->sync); |
aa5a8fdc | 337 | stats->n_lost++; |
821cb9fa | 338 | u64_stats_update_end(&stats->sync); |
aa5a8fdc | 339 | |
aa5a8fdc | 340 | return err; |
982b8810 BP |
341 | } |
342 | ||
5ae440c3 | 343 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
7257b535 | 344 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 345 | { |
d4cba1f8 | 346 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
347 | struct dp_upcall_info later_info; |
348 | struct sw_flow_key later_key; | |
349 | struct sk_buff *segs, *nskb; | |
350 | int err; | |
cb5087ca | 351 | |
1d04cd4e | 352 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
79089764 PS |
353 | if (IS_ERR(segs)) |
354 | return PTR_ERR(segs); | |
99769a40 | 355 | |
7257b535 BP |
356 | /* Queue all of the segments. */ |
357 | skb = segs; | |
cb5087ca | 358 | do { |
5ae440c3 | 359 | err = queue_userspace_packet(dp, skb, upcall_info); |
982b8810 | 360 | if (err) |
7257b535 | 361 | break; |
856081f6 | 362 | |
d4cba1f8 | 363 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
e1cf87ff JG |
364 | /* The initial flow key extracted by ovs_flow_extract() |
365 | * in this case is for a first fragment, so we need to | |
7257b535 BP |
366 | * properly mark later fragments. |
367 | */ | |
368 | later_key = *upcall_info->key; | |
9e44d715 | 369 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
7257b535 BP |
370 | |
371 | later_info = *upcall_info; | |
372 | later_info.key = &later_key; | |
373 | upcall_info = &later_info; | |
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 | ||
0afa2373 TG |
389 | static size_t key_attr_size(void) |
390 | { | |
6d8af7ab AZ |
391 | /* Whenever adding new OVS_KEY_ FIELDS, we should consider |
392 | * updating this function. */ | |
ccf43786 | 393 | BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 22); |
6d8af7ab | 394 | |
0afa2373 TG |
395 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ |
396 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ | |
397 | + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
398 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
399 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
400 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
401 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
402 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
403 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
94872594 | 404 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */ |
c1fc1411 | 405 | + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */ |
0afa2373 TG |
406 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ |
407 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
6d8af7ab AZ |
408 | + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */ |
409 | + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */ | |
0afa2373 TG |
410 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ |
411 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
412 | + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */ | |
413 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
414 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
415 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
416 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
417 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
418 | } | |
419 | ||
533bea51 TG |
420 | static size_t upcall_msg_size(const struct nlattr *userdata, |
421 | unsigned int hdrlen) | |
0afa2373 TG |
422 | { |
423 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
533bea51 | 424 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
0afa2373 TG |
425 | + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
426 | ||
427 | /* OVS_PACKET_ATTR_USERDATA */ | |
428 | if (userdata) | |
429 | size += NLA_ALIGN(userdata->nla_len); | |
430 | ||
431 | return size; | |
432 | } | |
433 | ||
5ae440c3 | 434 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
7257b535 BP |
435 | const struct dp_upcall_info *upcall_info) |
436 | { | |
437 | struct ovs_header *upcall; | |
6161d3fd | 438 | struct sk_buff *nskb = NULL; |
7257b535 BP |
439 | struct sk_buff *user_skb; /* to be queued to userspace */ |
440 | struct nlattr *nla; | |
68eadcf0 TG |
441 | struct genl_info info = { |
442 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0) | |
5ae440c3 | 443 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
68eadcf0 TG |
444 | #endif |
445 | .snd_portid = upcall_info->portid, | |
446 | }; | |
978188b2 | 447 | size_t len; |
533bea51 | 448 | unsigned int hlen; |
5ae440c3 TG |
449 | int err, dp_ifindex; |
450 | ||
451 | dp_ifindex = get_dpifindex(dp); | |
452 | if (!dp_ifindex) | |
453 | return -ENODEV; | |
7257b535 | 454 | |
6161d3fd JG |
455 | if (vlan_tx_tag_present(skb)) { |
456 | nskb = skb_clone(skb, GFP_ATOMIC); | |
457 | if (!nskb) | |
458 | return -ENOMEM; | |
07ac71ea PS |
459 | |
460 | nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb)); | |
461 | if (!nskb) | |
462 | return -ENOMEM; | |
463 | ||
464 | vlan_set_tci(nskb, 0); | |
7257b535 | 465 | |
6161d3fd JG |
466 | skb = nskb; |
467 | } | |
468 | ||
469 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
470 | err = -EFBIG; | |
471 | goto out; | |
472 | } | |
7257b535 | 473 | |
533bea51 TG |
474 | /* Complete checksum if needed */ |
475 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
476 | (err = skb_checksum_help(skb))) | |
477 | goto out; | |
478 | ||
479 | /* Older versions of OVS user space enforce alignment of the last | |
480 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
481 | * padding logic. Only perform zerocopy if padding is not required. | |
482 | */ | |
483 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
484 | hlen = skb_zerocopy_headlen(skb); | |
485 | else | |
486 | hlen = skb->len; | |
487 | ||
488 | len = upcall_msg_size(upcall_info->userdata, hlen); | |
68eadcf0 | 489 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
6161d3fd JG |
490 | if (!user_skb) { |
491 | err = -ENOMEM; | |
492 | goto out; | |
493 | } | |
7257b535 BP |
494 | |
495 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
496 | 0, upcall_info->cmd); | |
497 | upcall->dp_ifindex = dp_ifindex; | |
498 | ||
499 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
c1fc1411 JG |
500 | err = ovs_nla_put_flow(dp, upcall_info->key, |
501 | upcall_info->key, user_skb); | |
9a621f82 | 502 | BUG_ON(err); |
7257b535 BP |
503 | nla_nest_end(user_skb, nla); |
504 | ||
505 | if (upcall_info->userdata) | |
e995e3df | 506 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 507 | nla_len(upcall_info->userdata), |
e995e3df | 508 | nla_data(upcall_info->userdata)); |
7257b535 | 509 | |
533bea51 TG |
510 | /* Only reserve room for attribute header, packet data is added |
511 | * in skb_zerocopy() */ | |
512 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
513 | err = -ENOBUFS; | |
514 | goto out; | |
515 | } | |
516 | nla->nla_len = nla_attr_size(skb->len); | |
bed53bd1 | 517 | |
2c272bd9 ZK |
518 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
519 | if (err) | |
520 | goto out; | |
7257b535 | 521 | |
ef507cec | 522 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
978188b2 JG |
523 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { |
524 | size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len; | |
525 | ||
526 | if (plen > 0) | |
527 | memset(skb_put(user_skb, plen), 0, plen); | |
528 | } | |
ef507cec | 529 | |
533bea51 | 530 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
6161d3fd | 531 | |
533bea51 | 532 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
6161d3fd | 533 | out: |
2c272bd9 ZK |
534 | if (err) |
535 | skb_tx_error(skb); | |
6161d3fd JG |
536 | kfree_skb(nskb); |
537 | return err; | |
cb5087ca BP |
538 | } |
539 | ||
df2c07f4 | 540 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 541 | { |
df2c07f4 | 542 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 543 | struct nlattr **a = info->attrs; |
e0e57990 | 544 | struct sw_flow_actions *acts; |
982b8810 | 545 | struct sk_buff *packet; |
e0e57990 | 546 | struct sw_flow *flow; |
f7cd0081 | 547 | struct datapath *dp; |
d6569377 | 548 | struct ethhdr *eth; |
a6059080 | 549 | struct vport *input_vport; |
3f19d399 | 550 | int len; |
d6569377 | 551 | int err; |
064af421 | 552 | |
f7cd0081 | 553 | err = -EINVAL; |
df2c07f4 | 554 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 555 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 556 | goto err; |
064af421 | 557 | |
df2c07f4 | 558 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 559 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
560 | err = -ENOMEM; |
561 | if (!packet) | |
e5cad958 | 562 | goto err; |
3f19d399 BP |
563 | skb_reserve(packet, NET_IP_ALIGN); |
564 | ||
bf3d6fce | 565 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 566 | |
f7cd0081 BP |
567 | skb_reset_mac_header(packet); |
568 | eth = eth_hdr(packet); | |
064af421 | 569 | |
d6569377 BP |
570 | /* Normally, setting the skb 'protocol' field would be handled by a |
571 | * call to eth_type_trans(), but it assumes there's a sending | |
572 | * device, which we may not have. */ | |
7cd46155 | 573 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
f7cd0081 | 574 | packet->protocol = eth->h_proto; |
d6569377 | 575 | else |
f7cd0081 | 576 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 577 | |
e0e57990 | 578 | /* Build an sw_flow for sending this packet. */ |
df65fec1 | 579 | flow = ovs_flow_alloc(); |
e0e57990 BP |
580 | err = PTR_ERR(flow); |
581 | if (IS_ERR(flow)) | |
e5cad958 | 582 | goto err_kfree_skb; |
064af421 | 583 | |
a1c564be | 584 | err = ovs_flow_extract(packet, -1, &flow->key); |
e0e57990 | 585 | if (err) |
9321954a | 586 | goto err_flow_free; |
e0e57990 | 587 | |
a097c0b2 | 588 | err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 | 589 | if (err) |
9321954a | 590 | goto err_flow_free; |
a097c0b2 | 591 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
e0e57990 BP |
592 | err = PTR_ERR(acts); |
593 | if (IS_ERR(acts)) | |
9321954a | 594 | goto err_flow_free; |
9b405f1a | 595 | |
a097c0b2 | 596 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
ccf43786 | 597 | &flow->key, &acts); |
e0e57990 | 598 | rcu_assign_pointer(flow->sf_acts, acts); |
9b405f1a PS |
599 | if (err) |
600 | goto err_flow_free; | |
e0e57990 BP |
601 | |
602 | OVS_CB(packet)->flow = flow; | |
d1d71a36 | 603 | OVS_CB(packet)->pkt_key = &flow->key; |
abff858b | 604 | packet->priority = flow->key.phy.priority; |
3025a772 | 605 | packet->mark = flow->key.phy.skb_mark; |
e0e57990 | 606 | |
d6569377 | 607 | rcu_read_lock(); |
01ac0970 | 608 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 609 | err = -ENODEV; |
e5cad958 BP |
610 | if (!dp) |
611 | goto err_unlock; | |
cc4015df | 612 | |
a6059080 AZ |
613 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
614 | if (!input_vport) | |
615 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
616 | ||
617 | if (!input_vport) | |
618 | goto err_unlock; | |
619 | ||
620 | OVS_CB(packet)->input_vport = input_vport; | |
621 | ||
e9141eec | 622 | local_bh_disable(); |
ca93abce | 623 | err = ovs_execute_actions(dp, packet, false); |
e9141eec | 624 | local_bh_enable(); |
d6569377 | 625 | rcu_read_unlock(); |
e0e57990 | 626 | |
a1c564be | 627 | ovs_flow_free(flow, false); |
e5cad958 | 628 | return err; |
064af421 | 629 | |
e5cad958 BP |
630 | err_unlock: |
631 | rcu_read_unlock(); | |
9321954a | 632 | err_flow_free: |
a1c564be | 633 | ovs_flow_free(flow, false); |
e5cad958 BP |
634 | err_kfree_skb: |
635 | kfree_skb(packet); | |
636 | err: | |
d6569377 | 637 | return err; |
064af421 BP |
638 | } |
639 | ||
df2c07f4 | 640 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc | 641 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
df2c07f4 JP |
642 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
643 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
644 | }; |
645 | ||
646 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 647 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
648 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
649 | .policy = packet_policy, | |
df2c07f4 | 650 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
651 | } |
652 | }; | |
653 | ||
cb25142c PS |
654 | static struct genl_family dp_packet_genl_family = { |
655 | .id = GENL_ID_GENERATE, | |
656 | .hdrsize = sizeof(struct ovs_header), | |
657 | .name = OVS_PACKET_FAMILY, | |
658 | .version = OVS_PACKET_VERSION, | |
659 | .maxattr = OVS_PACKET_ATTR_MAX, | |
660 | .netnsok = true, | |
661 | .parallel_ops = true, | |
662 | .ops = dp_packet_genl_ops, | |
663 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
664 | }; | |
665 | ||
4fa72a95 AZ |
666 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats, |
667 | struct ovs_dp_megaflow_stats *mega_stats) | |
064af421 | 668 | { |
d6569377 | 669 | int i; |
f180c2e2 | 670 | |
4fa72a95 AZ |
671 | memset(mega_stats, 0, sizeof(*mega_stats)); |
672 | ||
994dc286 | 673 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
4fa72a95 | 674 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
064af421 | 675 | |
7257b535 | 676 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
4fa72a95 | 677 | |
d6569377 BP |
678 | for_each_possible_cpu(i) { |
679 | const struct dp_stats_percpu *percpu_stats; | |
680 | struct dp_stats_percpu local_stats; | |
821cb9fa | 681 | unsigned int start; |
44e05eca | 682 | |
d6569377 | 683 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 684 | |
d6569377 | 685 | do { |
09f27436 | 686 | start = u64_stats_fetch_begin_irq(&percpu_stats->sync); |
d6569377 | 687 | local_stats = *percpu_stats; |
09f27436 | 688 | } while (u64_stats_fetch_retry_irq(&percpu_stats->sync, start)); |
064af421 | 689 | |
d6569377 BP |
690 | stats->n_hit += local_stats.n_hit; |
691 | stats->n_missed += local_stats.n_missed; | |
692 | stats->n_lost += local_stats.n_lost; | |
4fa72a95 | 693 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
d6569377 BP |
694 | } |
695 | } | |
064af421 | 696 | |
0afa2373 TG |
697 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
698 | { | |
699 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
700 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
a1c564be | 701 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */ |
0afa2373 TG |
702 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
703 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
704 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
705 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
706 | } | |
707 | ||
aa917006 | 708 | /* Called with ovs_mutex or RCU read lock. */ |
f1948bb9 JS |
709 | static int ovs_flow_cmd_fill_match(struct datapath *dp, |
710 | const struct sw_flow *flow, | |
711 | struct sk_buff *skb) | |
d6569377 | 712 | { |
d6569377 | 713 | struct nlattr *nla; |
d6569377 | 714 | int err; |
064af421 | 715 | |
a1c564be | 716 | /* Fill flow key. */ |
df2c07f4 | 717 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 | 718 | if (!nla) |
f1948bb9 | 719 | return -EMSGSIZE; |
a1c564be | 720 | |
c1fc1411 JG |
721 | err = ovs_nla_put_flow(dp, &flow->unmasked_key, |
722 | &flow->unmasked_key, skb); | |
d6569377 | 723 | if (err) |
f1948bb9 | 724 | return err; |
d6569377 BP |
725 | nla_nest_end(skb, nla); |
726 | ||
f1948bb9 | 727 | /* Fill flow mask. */ |
a1c564be AZ |
728 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); |
729 | if (!nla) | |
f1948bb9 | 730 | return -EMSGSIZE; |
a1c564be | 731 | |
c1fc1411 | 732 | err = ovs_nla_put_flow(dp, &flow->key, &flow->mask->key, skb); |
a1c564be | 733 | if (err) |
f1948bb9 | 734 | return err; |
a1c564be AZ |
735 | nla_nest_end(skb, nla); |
736 | ||
f1948bb9 JS |
737 | return 0; |
738 | } | |
739 | ||
740 | /* Called with ovs_mutex or RCU read lock. */ | |
741 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
742 | struct sk_buff *skb) | |
743 | { | |
744 | struct ovs_flow_stats stats; | |
745 | __be16 tcp_flags; | |
746 | unsigned long used; | |
747 | ||
b0f3a2fe | 748 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
f71db6b1 | 749 | |
b0f3a2fe PS |
750 | if (used && |
751 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
f1948bb9 | 752 | return -EMSGSIZE; |
d6569377 | 753 | |
b0f3a2fe PS |
754 | if (stats.n_packets && |
755 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) | |
f1948bb9 | 756 | return -EMSGSIZE; |
b0b906cc | 757 | |
b0f3a2fe PS |
758 | if ((u8)ntohs(tcp_flags) && |
759 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
f1948bb9 JS |
760 | return -EMSGSIZE; |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
765 | /* Called with ovs_mutex or RCU read lock. */ | |
766 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
767 | struct sk_buff *skb, int skb_orig_len) | |
768 | { | |
769 | struct nlattr *start; | |
770 | int err; | |
d6569377 | 771 | |
df2c07f4 | 772 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
773 | * this is the first flow to be dumped into 'skb'. This is unusual for |
774 | * Netlink but individual action lists can be longer than | |
775 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
776 | * The userspace caller can always fetch the actions separately if it | |
777 | * really wants them. (Most userspace callers in fact don't care.) | |
778 | * | |
779 | * This can only fail for dump operations because the skb is always | |
780 | * properly sized for single flows. | |
781 | */ | |
9b405f1a | 782 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 783 | if (start) { |
f44ccce1 PS |
784 | const struct sw_flow_actions *sf_acts; |
785 | ||
780ec6ae | 786 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
a097c0b2 PS |
787 | err = ovs_nla_put_actions(sf_acts->actions, |
788 | sf_acts->actions_len, skb); | |
f71db6b1 | 789 | |
0a25b039 BP |
790 | if (!err) |
791 | nla_nest_end(skb, start); | |
792 | else { | |
793 | if (skb_orig_len) | |
f1948bb9 | 794 | return err; |
0a25b039 BP |
795 | |
796 | nla_nest_cancel(skb, start); | |
797 | } | |
f1948bb9 JS |
798 | } else if (skb_orig_len) { |
799 | return -EMSGSIZE; | |
800 | } | |
801 | ||
802 | return 0; | |
803 | } | |
804 | ||
805 | /* Called with ovs_mutex or RCU read lock. */ | |
806 | static int ovs_flow_cmd_fill_info(struct datapath *dp, | |
807 | const struct sw_flow *flow, int dp_ifindex, | |
808 | struct sk_buff *skb, u32 portid, | |
809 | u32 seq, u32 flags, u8 cmd) | |
810 | { | |
811 | const int skb_orig_len = skb->len; | |
812 | struct ovs_header *ovs_header; | |
813 | int err; | |
814 | ||
815 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); | |
816 | if (!ovs_header) | |
817 | return -EMSGSIZE; | |
818 | ovs_header->dp_ifindex = dp_ifindex; | |
819 | ||
820 | err = ovs_flow_cmd_fill_match(dp, flow, skb); | |
821 | if (err) | |
822 | goto error; | |
823 | ||
824 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
825 | if (err) | |
826 | goto error; | |
827 | ||
828 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
829 | if (err) | |
830 | goto error; | |
37a1300c | 831 | |
df2c07f4 | 832 | return genlmsg_end(skb, ovs_header); |
d6569377 | 833 | |
37a1300c | 834 | error: |
df2c07f4 | 835 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 836 | return err; |
44e05eca BP |
837 | } |
838 | ||
f71db6b1 JR |
839 | /* May not be called with RCU read lock. */ |
840 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
afad3556 JR |
841 | struct genl_info *info, |
842 | bool always) | |
44e05eca | 843 | { |
afad3556 | 844 | struct sk_buff *skb; |
d6569377 | 845 | |
afad3556 JR |
846 | if (!always && !ovs_must_notify(info, &ovs_dp_flow_multicast_group)) |
847 | return NULL; | |
848 | ||
f71db6b1 | 849 | skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL); |
afad3556 JR |
850 | |
851 | if (!skb) | |
852 | return ERR_PTR(-ENOMEM); | |
853 | ||
854 | return skb; | |
37a1300c | 855 | } |
8d5ebd83 | 856 | |
f71db6b1 | 857 | /* Called with ovs_mutex. */ |
c1fc1411 JG |
858 | static struct sk_buff *ovs_flow_cmd_build_info(struct datapath *dp, |
859 | const struct sw_flow *flow, | |
f71db6b1 JR |
860 | int dp_ifindex, |
861 | struct genl_info *info, u8 cmd, | |
862 | bool always) | |
37a1300c BP |
863 | { |
864 | struct sk_buff *skb; | |
865 | int retval; | |
d6569377 | 866 | |
f71db6b1 JR |
867 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info, |
868 | always); | |
afad3556 JR |
869 | if (!skb || IS_ERR(skb)) |
870 | return skb; | |
d6569377 | 871 | |
c1fc1411 | 872 | retval = ovs_flow_cmd_fill_info(dp, flow, dp_ifindex, skb, |
f71db6b1 JR |
873 | info->snd_portid, info->snd_seq, 0, |
874 | cmd); | |
37a1300c | 875 | BUG_ON(retval < 0); |
d6569377 | 876 | return skb; |
064af421 BP |
877 | } |
878 | ||
0c9fd022 | 879 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
064af421 | 880 | { |
37a1300c | 881 | struct nlattr **a = info->attrs; |
df2c07f4 | 882 | struct ovs_header *ovs_header = info->userhdr; |
6740b721 | 883 | struct sw_flow *flow, *new_flow; |
a1c564be | 884 | struct sw_flow_mask mask; |
37a1300c | 885 | struct sk_buff *reply; |
9c52546b | 886 | struct datapath *dp; |
0c9fd022 | 887 | struct sw_flow_actions *acts; |
a1c564be | 888 | struct sw_flow_match match; |
bc4a05c6 | 889 | int error; |
064af421 | 890 | |
6740b721 | 891 | /* Must have key and actions. */ |
37a1300c | 892 | error = -EINVAL; |
a473df5b JG |
893 | if (!a[OVS_FLOW_ATTR_KEY]) { |
894 | OVS_NLERR("Flow key attribute not present in new flow.\n"); | |
37a1300c | 895 | goto error; |
a473df5b JG |
896 | } |
897 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
898 | OVS_NLERR("Flow actions attribute not present in new flow.\n"); | |
6740b721 | 899 | goto error; |
a473df5b | 900 | } |
a1c564be | 901 | |
6740b721 JR |
902 | /* Most of the time we need to allocate a new flow, do it before |
903 | * locking. */ | |
904 | new_flow = ovs_flow_alloc(); | |
905 | if (IS_ERR(new_flow)) { | |
906 | error = PTR_ERR(new_flow); | |
907 | goto error; | |
908 | } | |
909 | ||
910 | /* Extract key. */ | |
911 | ovs_match_init(&match, &new_flow->unmasked_key, &mask); | |
df65fec1 | 912 | error = ovs_nla_get_match(&match, |
a097c0b2 | 913 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); |
37a1300c | 914 | if (error) |
6740b721 | 915 | goto err_kfree_flow; |
064af421 | 916 | |
6740b721 | 917 | ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask); |
9b405f1a | 918 | |
6740b721 | 919 | /* Validate actions. */ |
0c9fd022 JR |
920 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
921 | error = PTR_ERR(acts); | |
922 | if (IS_ERR(acts)) | |
6740b721 | 923 | goto err_kfree_flow; |
0c9fd022 | 924 | |
6740b721 | 925 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key, |
ccf43786 | 926 | &acts); |
0c9fd022 JR |
927 | if (error) { |
928 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
6740b721 JR |
929 | goto err_kfree_acts; |
930 | } | |
931 | ||
932 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
933 | if (IS_ERR(reply)) { | |
934 | error = PTR_ERR(reply); | |
935 | goto err_kfree_acts; | |
37a1300c BP |
936 | } |
937 | ||
cd2a59e9 | 938 | ovs_lock(); |
2a4999f3 | 939 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
6740b721 JR |
940 | if (unlikely(!dp)) { |
941 | error = -ENODEV; | |
cd2a59e9 | 942 | goto err_unlock_ovs; |
6740b721 | 943 | } |
a1c564be | 944 | /* Check if this is a duplicate flow */ |
6740b721 JR |
945 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key); |
946 | if (likely(!flow)) { | |
947 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
d6569377 | 948 | |
d6569377 | 949 | /* Put flow in bucket. */ |
6740b721 JR |
950 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
951 | if (unlikely(error)) { | |
0585f7a8 | 952 | acts = NULL; |
6740b721 JR |
953 | goto err_unlock_ovs; |
954 | } | |
955 | ||
956 | if (unlikely(reply)) { | |
c1fc1411 | 957 | error = ovs_flow_cmd_fill_info(dp, new_flow, |
6740b721 JR |
958 | ovs_header->dp_ifindex, |
959 | reply, info->snd_portid, | |
960 | info->snd_seq, 0, | |
961 | OVS_FLOW_CMD_NEW); | |
962 | BUG_ON(error < 0); | |
0585f7a8 | 963 | } |
6740b721 | 964 | ovs_unlock(); |
d6569377 | 965 | } else { |
0c9fd022 JR |
966 | struct sw_flow_actions *old_acts; |
967 | ||
d6569377 BP |
968 | /* Bail out if we're not allowed to modify an existing flow. |
969 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
970 | * because Generic Netlink treats the latter as a dump | |
971 | * request. We also accept NLM_F_EXCL in case that bug ever | |
972 | * gets fixed. | |
973 | */ | |
6740b721 JR |
974 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
975 | | NLM_F_EXCL))) { | |
976 | error = -EEXIST; | |
cd2a59e9 | 977 | goto err_unlock_ovs; |
6740b721 | 978 | } |
b21e5b6a | 979 | /* The unmasked key has to be the same for flow updates. */ |
6740b721 | 980 | if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) { |
3440e4bc AW |
981 | /* Look for any overlapping flow. */ |
982 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
983 | if (!flow) { | |
984 | error = -ENOENT; | |
985 | goto err_unlock_ovs; | |
986 | } | |
6740b721 | 987 | } |
0c9fd022 JR |
988 | /* Update actions. */ |
989 | old_acts = ovsl_dereference(flow->sf_acts); | |
990 | rcu_assign_pointer(flow->sf_acts, acts); | |
0c9fd022 | 991 | |
6740b721 | 992 | if (unlikely(reply)) { |
c1fc1411 | 993 | error = ovs_flow_cmd_fill_info(dp, flow, |
6740b721 JR |
994 | ovs_header->dp_ifindex, |
995 | reply, info->snd_portid, | |
996 | info->snd_seq, 0, | |
997 | OVS_FLOW_CMD_NEW); | |
998 | BUG_ON(error < 0); | |
999 | } | |
1000 | ovs_unlock(); | |
0c9fd022 | 1001 | |
6740b721 JR |
1002 | ovs_nla_free_flow_actions(old_acts); |
1003 | ovs_flow_free(new_flow, false); | |
0c9fd022 | 1004 | } |
6740b721 JR |
1005 | |
1006 | if (reply) | |
cb25142c | 1007 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
0c9fd022 JR |
1008 | return 0; |
1009 | ||
0c9fd022 JR |
1010 | err_unlock_ovs: |
1011 | ovs_unlock(); | |
6740b721 JR |
1012 | kfree_skb(reply); |
1013 | err_kfree_acts: | |
0c9fd022 | 1014 | kfree(acts); |
6740b721 JR |
1015 | err_kfree_flow: |
1016 | ovs_flow_free(new_flow, false); | |
0c9fd022 JR |
1017 | error: |
1018 | return error; | |
1019 | } | |
1020 | ||
1d2a1b5f JG |
1021 | static struct sw_flow_actions *get_flow_actions(const struct nlattr *a, |
1022 | const struct sw_flow_key *key, | |
1023 | const struct sw_flow_mask *mask) | |
1024 | { | |
1025 | struct sw_flow_actions *acts; | |
1026 | struct sw_flow_key masked_key; | |
1027 | int error; | |
1028 | ||
1029 | acts = ovs_nla_alloc_flow_actions(nla_len(a)); | |
1030 | if (IS_ERR(acts)) | |
1031 | return acts; | |
1032 | ||
1033 | ovs_flow_mask_key(&masked_key, key, mask); | |
ccf43786 | 1034 | error = ovs_nla_copy_actions(a, &masked_key, &acts); |
1d2a1b5f JG |
1035 | if (error) { |
1036 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
1037 | kfree(acts); | |
1038 | return ERR_PTR(error); | |
1039 | } | |
1040 | ||
1041 | return acts; | |
1042 | } | |
1043 | ||
0c9fd022 JR |
1044 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1045 | { | |
1046 | struct nlattr **a = info->attrs; | |
1047 | struct ovs_header *ovs_header = info->userhdr; | |
1d2a1b5f | 1048 | struct sw_flow_key key; |
0c9fd022 JR |
1049 | struct sw_flow *flow; |
1050 | struct sw_flow_mask mask; | |
1051 | struct sk_buff *reply = NULL; | |
1052 | struct datapath *dp; | |
6740b721 | 1053 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
0c9fd022 JR |
1054 | struct sw_flow_match match; |
1055 | int error; | |
1056 | ||
1057 | /* Extract key. */ | |
1058 | error = -EINVAL; | |
a473df5b JG |
1059 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1060 | OVS_NLERR("Flow key attribute not present in set flow.\n"); | |
0c9fd022 | 1061 | goto error; |
a473df5b | 1062 | } |
0c9fd022 JR |
1063 | |
1064 | ovs_match_init(&match, &key, &mask); | |
1065 | error = ovs_nla_get_match(&match, | |
1066 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); | |
1067 | if (error) | |
1068 | goto error; | |
d6569377 | 1069 | |
0c9fd022 JR |
1070 | /* Validate actions. */ |
1071 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1d2a1b5f JG |
1072 | acts = get_flow_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, &mask); |
1073 | if (IS_ERR(acts)) { | |
1074 | error = PTR_ERR(acts); | |
0c9fd022 | 1075 | goto error; |
6740b721 JR |
1076 | } |
1077 | } | |
1078 | ||
1079 | /* Can allocate before locking if have acts. */ | |
1080 | if (acts) { | |
1081 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
1082 | if (IS_ERR(reply)) { | |
1083 | error = PTR_ERR(reply); | |
1084 | goto err_kfree_acts; | |
90b8c2f7 | 1085 | } |
0c9fd022 JR |
1086 | } |
1087 | ||
1088 | ovs_lock(); | |
1089 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
6740b721 JR |
1090 | if (unlikely(!dp)) { |
1091 | error = -ENODEV; | |
0c9fd022 | 1092 | goto err_unlock_ovs; |
6740b721 | 1093 | } |
0c9fd022 | 1094 | /* Check that the flow exists. */ |
3440e4bc | 1095 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
6740b721 JR |
1096 | if (unlikely(!flow)) { |
1097 | error = -ENOENT; | |
0c9fd022 | 1098 | goto err_unlock_ovs; |
6740b721 | 1099 | } |
3440e4bc | 1100 | |
0c9fd022 | 1101 | /* Update actions, if present. */ |
6740b721 | 1102 | if (likely(acts)) { |
0c9fd022 JR |
1103 | old_acts = ovsl_dereference(flow->sf_acts); |
1104 | rcu_assign_pointer(flow->sf_acts, acts); | |
6740b721 JR |
1105 | |
1106 | if (unlikely(reply)) { | |
c1fc1411 | 1107 | error = ovs_flow_cmd_fill_info(dp, flow, |
6740b721 JR |
1108 | ovs_header->dp_ifindex, |
1109 | reply, info->snd_portid, | |
1110 | info->snd_seq, 0, | |
1111 | OVS_FLOW_CMD_NEW); | |
1112 | BUG_ON(error < 0); | |
1113 | } | |
1114 | } else { | |
1115 | /* Could not alloc without acts before locking. */ | |
c1fc1411 JG |
1116 | reply = ovs_flow_cmd_build_info(dp, flow, |
1117 | ovs_header->dp_ifindex, | |
6740b721 JR |
1118 | info, OVS_FLOW_CMD_NEW, false); |
1119 | if (unlikely(IS_ERR(reply))) { | |
1120 | error = PTR_ERR(reply); | |
1121 | goto err_unlock_ovs; | |
1122 | } | |
9c52546b | 1123 | } |
0c9fd022 | 1124 | |
0c9fd022 JR |
1125 | /* Clear stats. */ |
1126 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1127 | ovs_flow_stats_clear(flow); | |
cd2a59e9 | 1128 | ovs_unlock(); |
37a1300c | 1129 | |
6740b721 | 1130 | if (reply) |
cb25142c | 1131 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
6740b721 JR |
1132 | if (old_acts) |
1133 | ovs_nla_free_flow_actions(old_acts); | |
d6569377 | 1134 | return 0; |
704a1e09 | 1135 | |
cd2a59e9 PS |
1136 | err_unlock_ovs: |
1137 | ovs_unlock(); | |
6740b721 JR |
1138 | kfree_skb(reply); |
1139 | err_kfree_acts: | |
ba400435 | 1140 | kfree(acts); |
37a1300c | 1141 | error: |
9c52546b | 1142 | return error; |
704a1e09 BP |
1143 | } |
1144 | ||
df2c07f4 | 1145 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1146 | { |
37a1300c | 1147 | struct nlattr **a = info->attrs; |
df2c07f4 | 1148 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1149 | struct sw_flow_key key; |
37a1300c | 1150 | struct sk_buff *reply; |
704a1e09 | 1151 | struct sw_flow *flow; |
9c52546b | 1152 | struct datapath *dp; |
a1c564be | 1153 | struct sw_flow_match match; |
9c52546b | 1154 | int err; |
704a1e09 | 1155 | |
1b936472 AZ |
1156 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1157 | OVS_NLERR("Flow get message rejected, Key attribute missing.\n"); | |
37a1300c | 1158 | return -EINVAL; |
1b936472 | 1159 | } |
a1c564be AZ |
1160 | |
1161 | ovs_match_init(&match, &key, NULL); | |
df65fec1 | 1162 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL); |
37a1300c BP |
1163 | if (err) |
1164 | return err; | |
704a1e09 | 1165 | |
cd2a59e9 | 1166 | ovs_lock(); |
2a4999f3 | 1167 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1168 | if (!dp) { |
1169 | err = -ENODEV; | |
1170 | goto unlock; | |
1171 | } | |
704a1e09 | 1172 | |
3440e4bc AW |
1173 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1174 | if (!flow) { | |
cd2a59e9 PS |
1175 | err = -ENOENT; |
1176 | goto unlock; | |
1177 | } | |
d6569377 | 1178 | |
c1fc1411 | 1179 | reply = ovs_flow_cmd_build_info(dp, flow, ovs_header->dp_ifindex, info, |
f71db6b1 | 1180 | OVS_FLOW_CMD_NEW, true); |
cd2a59e9 PS |
1181 | if (IS_ERR(reply)) { |
1182 | err = PTR_ERR(reply); | |
1183 | goto unlock; | |
1184 | } | |
36956a7d | 1185 | |
cd2a59e9 | 1186 | ovs_unlock(); |
37a1300c | 1187 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1188 | unlock: |
1189 | ovs_unlock(); | |
1190 | return err; | |
d6569377 | 1191 | } |
9c52546b | 1192 | |
df2c07f4 | 1193 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1194 | { |
37a1300c | 1195 | struct nlattr **a = info->attrs; |
df2c07f4 | 1196 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1197 | struct sw_flow_key key; |
37a1300c | 1198 | struct sk_buff *reply; |
d6569377 | 1199 | struct sw_flow *flow; |
d6569377 | 1200 | struct datapath *dp; |
a1c564be | 1201 | struct sw_flow_match match; |
d6569377 | 1202 | int err; |
36956a7d | 1203 | |
cde7f3ba JR |
1204 | if (likely(a[OVS_FLOW_ATTR_KEY])) { |
1205 | ovs_match_init(&match, &key, NULL); | |
1206 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL); | |
1207 | if (unlikely(err)) | |
1208 | return err; | |
1209 | } | |
1210 | ||
cd2a59e9 | 1211 | ovs_lock(); |
2a4999f3 | 1212 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cde7f3ba | 1213 | if (unlikely(!dp)) { |
cd2a59e9 PS |
1214 | err = -ENODEV; |
1215 | goto unlock; | |
1216 | } | |
cde7f3ba | 1217 | if (unlikely(!a[OVS_FLOW_ATTR_KEY])) { |
994dc286 | 1218 | err = ovs_flow_tbl_flush(&dp->table); |
cd2a59e9 PS |
1219 | goto unlock; |
1220 | } | |
3440e4bc AW |
1221 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); |
1222 | if (unlikely(!flow)) { | |
cd2a59e9 PS |
1223 | err = -ENOENT; |
1224 | goto unlock; | |
1225 | } | |
d6569377 | 1226 | |
994dc286 | 1227 | ovs_flow_tbl_remove(&dp->table, flow); |
cde7f3ba | 1228 | ovs_unlock(); |
37a1300c | 1229 | |
cde7f3ba JR |
1230 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *)flow->sf_acts, |
1231 | info, false); | |
1232 | ||
1233 | if (likely(reply)) { | |
1234 | if (likely(!IS_ERR(reply))) { | |
1235 | rcu_read_lock(); /* Keep RCU checker happy. */ | |
c1fc1411 | 1236 | err = ovs_flow_cmd_fill_info(dp, flow, |
cde7f3ba JR |
1237 | ovs_header->dp_ifindex, |
1238 | reply, info->snd_portid, | |
1239 | info->snd_seq, 0, | |
1240 | OVS_FLOW_CMD_DEL); | |
1241 | rcu_read_unlock(); | |
1242 | BUG_ON(err < 0); | |
cb25142c | 1243 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
cde7f3ba | 1244 | } else { |
cb25142c PS |
1245 | genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0, |
1246 | GROUP_ID(&ovs_dp_flow_multicast_group), PTR_ERR(reply)); | |
1247 | ||
cde7f3ba | 1248 | } |
afad3556 | 1249 | } |
37a1300c | 1250 | |
a1c564be | 1251 | ovs_flow_free(flow, true); |
37a1300c | 1252 | return 0; |
cd2a59e9 PS |
1253 | unlock: |
1254 | ovs_unlock(); | |
1255 | return err; | |
37a1300c BP |
1256 | } |
1257 | ||
df2c07f4 | 1258 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1259 | { |
df2c07f4 | 1260 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
994dc286 | 1261 | struct table_instance *ti; |
37a1300c BP |
1262 | struct datapath *dp; |
1263 | ||
f44ccce1 | 1264 | rcu_read_lock(); |
01ac0970 | 1265 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 1266 | if (!dp) { |
f44ccce1 | 1267 | rcu_read_unlock(); |
37a1300c | 1268 | return -ENODEV; |
cd2a59e9 | 1269 | } |
37a1300c | 1270 | |
994dc286 | 1271 | ti = rcu_dereference(dp->table.ti); |
37a1300c | 1272 | for (;;) { |
37a1300c BP |
1273 | struct sw_flow *flow; |
1274 | u32 bucket, obj; | |
1275 | ||
1276 | bucket = cb->args[0]; | |
1277 | obj = cb->args[1]; | |
994dc286 | 1278 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
3544358a | 1279 | if (!flow) |
37a1300c BP |
1280 | break; |
1281 | ||
c1fc1411 | 1282 | if (ovs_flow_cmd_fill_info(dp, flow, ovs_header->dp_ifindex, skb, |
28aea917 | 1283 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1284 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1285 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1286 | break; |
1287 | ||
1288 | cb->args[0] = bucket; | |
1289 | cb->args[1] = obj; | |
1290 | } | |
f44ccce1 | 1291 | rcu_read_unlock(); |
37a1300c | 1292 | return skb->len; |
704a1e09 BP |
1293 | } |
1294 | ||
cb25142c PS |
1295 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1296 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
1297 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1298 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
1299 | }; | |
1300 | ||
37a1300c | 1301 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1302 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1303 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1304 | .policy = flow_policy, | |
0c9fd022 | 1305 | .doit = ovs_flow_cmd_new |
37a1300c | 1306 | }, |
df2c07f4 | 1307 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1308 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1309 | .policy = flow_policy, | |
df2c07f4 | 1310 | .doit = ovs_flow_cmd_del |
37a1300c | 1311 | }, |
df2c07f4 | 1312 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1313 | .flags = 0, /* OK for unprivileged users. */ |
1314 | .policy = flow_policy, | |
df2c07f4 JP |
1315 | .doit = ovs_flow_cmd_get, |
1316 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1317 | }, |
df2c07f4 | 1318 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1319 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1320 | .policy = flow_policy, | |
0c9fd022 | 1321 | .doit = ovs_flow_cmd_set, |
37a1300c BP |
1322 | }, |
1323 | }; | |
1324 | ||
cb25142c | 1325 | static struct genl_family dp_flow_genl_family = { |
aaff4b55 | 1326 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1327 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1328 | .name = OVS_FLOW_FAMILY, |
1329 | .version = OVS_FLOW_VERSION, | |
1330 | .maxattr = OVS_FLOW_ATTR_MAX, | |
b3dcb73c | 1331 | .netnsok = true, |
cb25142c PS |
1332 | .parallel_ops = true, |
1333 | .ops = dp_flow_genl_ops, | |
1334 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1335 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1336 | .n_mcgrps = 1, | |
aaff4b55 BP |
1337 | }; |
1338 | ||
0afa2373 TG |
1339 | static size_t ovs_dp_cmd_msg_size(void) |
1340 | { | |
1341 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1342 | ||
1343 | msgsize += nla_total_size(IFNAMSIZ); | |
1344 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
4fa72a95 | 1345 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
300af20a | 1346 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
0afa2373 TG |
1347 | |
1348 | return msgsize; | |
1349 | } | |
1350 | ||
aa917006 | 1351 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1352 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1353 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1354 | { |
df2c07f4 | 1355 | struct ovs_header *ovs_header; |
e926dfe3 | 1356 | struct ovs_dp_stats dp_stats; |
4fa72a95 | 1357 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
064af421 BP |
1358 | int err; |
1359 | ||
28aea917 | 1360 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1361 | flags, cmd); |
df2c07f4 | 1362 | if (!ovs_header) |
aaff4b55 | 1363 | goto error; |
064af421 | 1364 | |
b063d9f0 | 1365 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1366 | |
850b6b3b | 1367 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
064af421 | 1368 | if (err) |
d6569377 | 1369 | goto nla_put_failure; |
064af421 | 1370 | |
4fa72a95 AZ |
1371 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1372 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1373 | &dp_stats)) | |
1374 | goto nla_put_failure; | |
1375 | ||
1376 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1377 | sizeof(struct ovs_dp_megaflow_stats), | |
1378 | &dp_megaflow_stats)) | |
c3cc8c03 | 1379 | goto nla_put_failure; |
d6569377 | 1380 | |
c58cc9a4 TG |
1381 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1382 | goto nla_put_failure; | |
1383 | ||
df2c07f4 | 1384 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1385 | |
1386 | nla_put_failure: | |
df2c07f4 | 1387 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1388 | error: |
1389 | return -EMSGSIZE; | |
d6569377 BP |
1390 | } |
1391 | ||
d81eef1b | 1392 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
d6569377 | 1393 | { |
d81eef1b | 1394 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
aaff4b55 | 1395 | } |
9dca7bd5 | 1396 | |
aa917006 | 1397 | /* Called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 PS |
1398 | static struct datapath *lookup_datapath(struct net *net, |
1399 | struct ovs_header *ovs_header, | |
6455100f | 1400 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1401 | { |
254f2dc8 BP |
1402 | struct datapath *dp; |
1403 | ||
df2c07f4 | 1404 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1405 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1406 | else { |
d6569377 | 1407 | struct vport *vport; |
d6569377 | 1408 | |
2a4999f3 | 1409 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1410 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
d6569377 | 1411 | } |
254f2dc8 | 1412 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1413 | } |
1414 | ||
94358dcf TG |
1415 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1416 | { | |
1417 | struct datapath *dp; | |
1418 | ||
1419 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
09350a3d | 1420 | if (IS_ERR(dp)) |
94358dcf TG |
1421 | return; |
1422 | ||
1423 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1424 | dp->user_features = 0; | |
1425 | } | |
1426 | ||
c58cc9a4 TG |
1427 | static void ovs_dp_change(struct datapath *dp, struct nlattr **a) |
1428 | { | |
1429 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1430 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1431 | } | |
1432 | ||
df2c07f4 | 1433 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1434 | { |
aaff4b55 | 1435 | struct nlattr **a = info->attrs; |
d6569377 | 1436 | struct vport_parms parms; |
aaff4b55 | 1437 | struct sk_buff *reply; |
d6569377 BP |
1438 | struct datapath *dp; |
1439 | struct vport *vport; | |
2a4999f3 | 1440 | struct ovs_net *ovs_net; |
95b1d73a | 1441 | int err, i; |
d6569377 | 1442 | |
d6569377 | 1443 | err = -EINVAL; |
ea36840f | 1444 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1445 | goto err; |
1446 | ||
d81eef1b JR |
1447 | reply = ovs_dp_cmd_alloc_info(info); |
1448 | if (!reply) | |
1449 | return -ENOMEM; | |
d6569377 | 1450 | |
d6569377 BP |
1451 | err = -ENOMEM; |
1452 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1453 | if (dp == NULL) | |
d81eef1b | 1454 | goto err_free_reply; |
2a4999f3 | 1455 | |
0ceaa66c JG |
1456 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1457 | ||
d6569377 | 1458 | /* Allocate table. */ |
994dc286 PS |
1459 | err = ovs_flow_tbl_init(&dp->table); |
1460 | if (err) | |
d6569377 BP |
1461 | goto err_free_dp; |
1462 | ||
99769a40 JG |
1463 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); |
1464 | if (!dp->stats_percpu) { | |
1465 | err = -ENOMEM; | |
1466 | goto err_destroy_table; | |
1467 | } | |
1468 | ||
cb25142c PS |
1469 | for_each_possible_cpu(i) { |
1470 | struct dp_stats_percpu *dpath_stats; | |
1471 | dpath_stats = per_cpu_ptr(dp->stats_percpu, i); | |
1472 | u64_stats_init(&dpath_stats->sync); | |
1473 | } | |
1474 | ||
95b1d73a PS |
1475 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1476 | GFP_KERNEL); | |
1477 | if (!dp->ports) { | |
1478 | err = -ENOMEM; | |
1479 | goto err_destroy_percpu; | |
1480 | } | |
1481 | ||
1482 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1483 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1484 | ||
d6569377 | 1485 | /* Set up our datapath device. */ |
df2c07f4 JP |
1486 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1487 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1488 | parms.options = NULL; |
1489 | parms.dp = dp; | |
df2c07f4 | 1490 | parms.port_no = OVSP_LOCAL; |
beb1c69a | 1491 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
b063d9f0 | 1492 | |
c58cc9a4 TG |
1493 | ovs_dp_change(dp, a); |
1494 | ||
d81eef1b JR |
1495 | /* So far only local changes have been made, now need the lock. */ |
1496 | ovs_lock(); | |
1497 | ||
d6569377 BP |
1498 | vport = new_vport(&parms); |
1499 | if (IS_ERR(vport)) { | |
1500 | err = PTR_ERR(vport); | |
1501 | if (err == -EBUSY) | |
1502 | err = -EEXIST; | |
1503 | ||
94358dcf TG |
1504 | if (err == -EEXIST) { |
1505 | /* An outdated user space instance that does not understand | |
1506 | * the concept of user_features has attempted to create a new | |
1507 | * datapath and is likely to reuse it. Drop all user features. | |
1508 | */ | |
1509 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1510 | ovs_dp_reset_user_features(skb, info); | |
1511 | } | |
1512 | ||
95b1d73a | 1513 | goto err_destroy_ports_array; |
d6569377 | 1514 | } |
d6569377 | 1515 | |
d81eef1b JR |
1516 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1517 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1518 | BUG_ON(err < 0); | |
aaff4b55 | 1519 | |
2a4999f3 | 1520 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1521 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
d6569377 | 1522 | |
cd2a59e9 | 1523 | ovs_unlock(); |
d6569377 | 1524 | |
cb25142c | 1525 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
d6569377 BP |
1526 | return 0; |
1527 | ||
95b1d73a | 1528 | err_destroy_ports_array: |
d81eef1b | 1529 | ovs_unlock(); |
95b1d73a | 1530 | kfree(dp->ports); |
99769a40 JG |
1531 | err_destroy_percpu: |
1532 | free_percpu(dp->stats_percpu); | |
d6569377 | 1533 | err_destroy_table: |
e379e4d1 | 1534 | ovs_flow_tbl_destroy(&dp->table); |
d6569377 | 1535 | err_free_dp: |
0ceaa66c | 1536 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1537 | kfree(dp); |
d81eef1b JR |
1538 | err_free_reply: |
1539 | kfree_skb(reply); | |
d6569377 | 1540 | err: |
064af421 BP |
1541 | return err; |
1542 | } | |
1543 | ||
cd2a59e9 | 1544 | /* Called with ovs_mutex. */ |
2a4999f3 | 1545 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1546 | { |
95b1d73a | 1547 | int i; |
44e05eca | 1548 | |
95b1d73a PS |
1549 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1550 | struct vport *vport; | |
f8dfbcb7 | 1551 | struct hlist_node *n; |
95b1d73a | 1552 | |
f8dfbcb7 | 1553 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1554 | if (vport->port_no != OVSP_LOCAL) |
1555 | ovs_dp_detach_port(vport); | |
1556 | } | |
ed099e92 | 1557 | |
fb93e9aa | 1558 | list_del_rcu(&dp->list_node); |
ed099e92 | 1559 | |
cd2a59e9 | 1560 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
d103f479 AZ |
1561 | * all ports in datapath are destroyed first before freeing datapath. |
1562 | */ | |
cd2a59e9 | 1563 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
99620d2c | 1564 | |
d103f479 | 1565 | /* RCU destroy the flow table */ |
ed099e92 | 1566 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1567 | } |
1568 | ||
1569 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1570 | { | |
1571 | struct sk_buff *reply; | |
1572 | struct datapath *dp; | |
1573 | int err; | |
1574 | ||
d81eef1b JR |
1575 | reply = ovs_dp_cmd_alloc_info(info); |
1576 | if (!reply) | |
1577 | return -ENOMEM; | |
1578 | ||
cd2a59e9 | 1579 | ovs_lock(); |
2a4999f3 PS |
1580 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1581 | err = PTR_ERR(dp); | |
1582 | if (IS_ERR(dp)) | |
d81eef1b | 1583 | goto err_unlock_free; |
2a4999f3 | 1584 | |
d81eef1b JR |
1585 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1586 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1587 | BUG_ON(err < 0); | |
2a4999f3 PS |
1588 | |
1589 | __dp_destroy(dp); | |
ed099e92 | 1590 | |
d81eef1b | 1591 | ovs_unlock(); |
cb25142c | 1592 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
99620d2c | 1593 | return 0; |
d81eef1b JR |
1594 | |
1595 | err_unlock_free: | |
cd2a59e9 | 1596 | ovs_unlock(); |
d81eef1b | 1597 | kfree_skb(reply); |
cd2a59e9 | 1598 | return err; |
44e05eca BP |
1599 | } |
1600 | ||
df2c07f4 | 1601 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1602 | { |
aaff4b55 | 1603 | struct sk_buff *reply; |
d6569377 | 1604 | struct datapath *dp; |
d6569377 | 1605 | int err; |
064af421 | 1606 | |
d81eef1b JR |
1607 | reply = ovs_dp_cmd_alloc_info(info); |
1608 | if (!reply) | |
1609 | return -ENOMEM; | |
1610 | ||
cd2a59e9 | 1611 | ovs_lock(); |
2a4999f3 | 1612 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1613 | err = PTR_ERR(dp); |
d6569377 | 1614 | if (IS_ERR(dp)) |
d81eef1b | 1615 | goto err_unlock_free; |
38c6ecbc | 1616 | |
c58cc9a4 TG |
1617 | ovs_dp_change(dp, info->attrs); |
1618 | ||
d81eef1b JR |
1619 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1620 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1621 | BUG_ON(err < 0); | |
aaff4b55 | 1622 | |
cd2a59e9 | 1623 | ovs_unlock(); |
cb25142c | 1624 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
aaff4b55 | 1625 | return 0; |
d81eef1b JR |
1626 | |
1627 | err_unlock_free: | |
cd2a59e9 | 1628 | ovs_unlock(); |
d81eef1b | 1629 | kfree_skb(reply); |
cd2a59e9 | 1630 | return err; |
064af421 BP |
1631 | } |
1632 | ||
df2c07f4 | 1633 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1634 | { |
aaff4b55 | 1635 | struct sk_buff *reply; |
d6569377 | 1636 | struct datapath *dp; |
d6569377 | 1637 | int err; |
1dcf111b | 1638 | |
d81eef1b JR |
1639 | reply = ovs_dp_cmd_alloc_info(info); |
1640 | if (!reply) | |
1641 | return -ENOMEM; | |
1642 | ||
1643 | rcu_read_lock(); | |
2a4999f3 | 1644 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1645 | if (IS_ERR(dp)) { |
1646 | err = PTR_ERR(dp); | |
d81eef1b | 1647 | goto err_unlock_free; |
cd2a59e9 | 1648 | } |
d81eef1b JR |
1649 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1650 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1651 | BUG_ON(err < 0); | |
1652 | rcu_read_unlock(); | |
aaff4b55 BP |
1653 | |
1654 | return genlmsg_reply(reply, info); | |
cd2a59e9 | 1655 | |
d81eef1b JR |
1656 | err_unlock_free: |
1657 | rcu_read_unlock(); | |
1658 | kfree_skb(reply); | |
cd2a59e9 | 1659 | return err; |
1dcf111b JP |
1660 | } |
1661 | ||
df2c07f4 | 1662 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1663 | { |
2a4999f3 | 1664 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1665 | struct datapath *dp; |
1666 | int skip = cb->args[0]; | |
1667 | int i = 0; | |
a7786963 | 1668 | |
fb93e9aa PS |
1669 | rcu_read_lock(); |
1670 | list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1671 | if (i >= skip && |
28aea917 | 1672 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1673 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1674 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1675 | break; |
254f2dc8 | 1676 | i++; |
a7786963 | 1677 | } |
fb93e9aa | 1678 | rcu_read_unlock(); |
aaff4b55 | 1679 | |
254f2dc8 BP |
1680 | cb->args[0] = i; |
1681 | ||
aaff4b55 | 1682 | return skb->len; |
c19e6535 BP |
1683 | } |
1684 | ||
cb25142c PS |
1685 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1686 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1687 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1688 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1689 | }; | |
1690 | ||
aaff4b55 | 1691 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1692 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1693 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1694 | .policy = datapath_policy, | |
df2c07f4 | 1695 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1696 | }, |
df2c07f4 | 1697 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1698 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1699 | .policy = datapath_policy, | |
df2c07f4 | 1700 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1701 | }, |
df2c07f4 | 1702 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1703 | .flags = 0, /* OK for unprivileged users. */ |
1704 | .policy = datapath_policy, | |
df2c07f4 JP |
1705 | .doit = ovs_dp_cmd_get, |
1706 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1707 | }, |
df2c07f4 | 1708 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1709 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1710 | .policy = datapath_policy, | |
df2c07f4 | 1711 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1712 | }, |
1713 | }; | |
1714 | ||
cb25142c | 1715 | static struct genl_family dp_datapath_genl_family = { |
f0fef760 | 1716 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1717 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1718 | .name = OVS_DATAPATH_FAMILY, |
1719 | .version = OVS_DATAPATH_VERSION, | |
1720 | .maxattr = OVS_DP_ATTR_MAX, | |
b3dcb73c | 1721 | .netnsok = true, |
cb25142c PS |
1722 | .parallel_ops = true, |
1723 | .ops = dp_datapath_genl_ops, | |
1724 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1725 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1726 | .n_mcgrps = 1, | |
f0fef760 BP |
1727 | }; |
1728 | ||
cd2a59e9 | 1729 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1730 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1731 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1732 | { |
df2c07f4 | 1733 | struct ovs_header *ovs_header; |
e926dfe3 | 1734 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1735 | int err; |
1736 | ||
28aea917 | 1737 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1738 | flags, cmd); |
df2c07f4 | 1739 | if (!ovs_header) |
f0fef760 | 1740 | return -EMSGSIZE; |
c19e6535 | 1741 | |
99769a40 | 1742 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1743 | |
c3cc8c03 DM |
1744 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1745 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
beb1c69a | 1746 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport))) |
c3cc8c03 | 1747 | goto nla_put_failure; |
c19e6535 | 1748 | |
850b6b3b | 1749 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1750 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1751 | &vport_stats)) | |
1752 | goto nla_put_failure; | |
c19e6535 | 1753 | |
beb1c69a AW |
1754 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1755 | goto nla_put_failure; | |
1756 | ||
850b6b3b | 1757 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1758 | if (err == -EMSGSIZE) |
1759 | goto error; | |
c19e6535 | 1760 | |
df2c07f4 | 1761 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1762 | |
1763 | nla_put_failure: | |
1764 | err = -EMSGSIZE; | |
f0fef760 | 1765 | error: |
df2c07f4 | 1766 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1767 | return err; |
064af421 BP |
1768 | } |
1769 | ||
d81eef1b JR |
1770 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1771 | { | |
1772 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1773 | } | |
1774 | ||
1775 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
28aea917 | 1776 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 1777 | u32 seq, u8 cmd) |
064af421 | 1778 | { |
c19e6535 | 1779 | struct sk_buff *skb; |
f0fef760 | 1780 | int retval; |
c19e6535 | 1781 | |
f0fef760 | 1782 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1783 | if (!skb) |
1784 | return ERR_PTR(-ENOMEM); | |
1785 | ||
28aea917 | 1786 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
1787 | BUG_ON(retval < 0); |
1788 | ||
c19e6535 | 1789 | return skb; |
f0fef760 | 1790 | } |
c19e6535 | 1791 | |
cd2a59e9 | 1792 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 PS |
1793 | static struct vport *lookup_vport(struct net *net, |
1794 | struct ovs_header *ovs_header, | |
df2c07f4 | 1795 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1796 | { |
1797 | struct datapath *dp; | |
1798 | struct vport *vport; | |
1799 | ||
df2c07f4 | 1800 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1801 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1802 | if (!vport) |
c19e6535 | 1803 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1804 | if (ovs_header->dp_ifindex && |
1805 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1806 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1807 | return vport; |
df2c07f4 JP |
1808 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1809 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1810 | |
1811 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1812 | return ERR_PTR(-EFBIG); |
c19e6535 | 1813 | |
2a4999f3 | 1814 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1815 | if (!dp) |
1816 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1817 | |
cd2a59e9 | 1818 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 1819 | if (!vport) |
17535c57 | 1820 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1821 | return vport; |
1822 | } else | |
1823 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1824 | } |
1825 | ||
df2c07f4 | 1826 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1827 | { |
f0fef760 | 1828 | struct nlattr **a = info->attrs; |
df2c07f4 | 1829 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1830 | struct vport_parms parms; |
ed099e92 | 1831 | struct sk_buff *reply; |
c19e6535 | 1832 | struct vport *vport; |
c19e6535 | 1833 | struct datapath *dp; |
b0ec0f27 | 1834 | u32 port_no; |
c19e6535 | 1835 | int err; |
b0ec0f27 | 1836 | |
ea36840f BP |
1837 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1838 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
d81eef1b JR |
1839 | return -EINVAL; |
1840 | ||
1841 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1842 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1843 | if (port_no >= DP_MAX_PORTS) | |
1844 | return -EFBIG; | |
1845 | ||
1846 | reply = ovs_vport_cmd_alloc_info(); | |
1847 | if (!reply) | |
1848 | return -ENOMEM; | |
f0fef760 | 1849 | |
cd2a59e9 | 1850 | ovs_lock(); |
2a4999f3 | 1851 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1852 | err = -ENODEV; |
1853 | if (!dp) | |
d81eef1b | 1854 | goto exit_unlock_free; |
c19e6535 | 1855 | |
d81eef1b | 1856 | if (port_no) { |
cd2a59e9 | 1857 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1858 | err = -EBUSY; |
1859 | if (vport) | |
d81eef1b | 1860 | goto exit_unlock_free; |
c19e6535 BP |
1861 | } else { |
1862 | for (port_no = 1; ; port_no++) { | |
1863 | if (port_no >= DP_MAX_PORTS) { | |
1864 | err = -EFBIG; | |
d81eef1b | 1865 | goto exit_unlock_free; |
c19e6535 | 1866 | } |
cd2a59e9 | 1867 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1868 | if (!vport) |
1869 | break; | |
51d4d598 | 1870 | } |
064af421 | 1871 | } |
b0ec0f27 | 1872 | |
df2c07f4 JP |
1873 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1874 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1875 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1876 | parms.dp = dp; |
1877 | parms.port_no = port_no; | |
beb1c69a | 1878 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
c19e6535 BP |
1879 | |
1880 | vport = new_vport(&parms); | |
1881 | err = PTR_ERR(vport); | |
1882 | if (IS_ERR(vport)) | |
d81eef1b | 1883 | goto exit_unlock_free; |
c19e6535 | 1884 | |
faef6d2d | 1885 | err = 0; |
1fc7083d JG |
1886 | if (a[OVS_VPORT_ATTR_STATS]) |
1887 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
1888 | ||
d81eef1b JR |
1889 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1890 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1891 | BUG_ON(err < 0); | |
1892 | ovs_unlock(); | |
e297c6b7 | 1893 | |
cb25142c | 1894 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 1895 | return 0; |
c19e6535 | 1896 | |
d81eef1b | 1897 | exit_unlock_free: |
cd2a59e9 | 1898 | ovs_unlock(); |
d81eef1b | 1899 | kfree_skb(reply); |
c19e6535 | 1900 | return err; |
44e05eca BP |
1901 | } |
1902 | ||
df2c07f4 | 1903 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1904 | { |
f0fef760 BP |
1905 | struct nlattr **a = info->attrs; |
1906 | struct sk_buff *reply; | |
c19e6535 | 1907 | struct vport *vport; |
c19e6535 | 1908 | int err; |
44e05eca | 1909 | |
d81eef1b JR |
1910 | reply = ovs_vport_cmd_alloc_info(); |
1911 | if (!reply) | |
1912 | return -ENOMEM; | |
1913 | ||
cd2a59e9 | 1914 | ovs_lock(); |
2a4999f3 | 1915 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
1916 | err = PTR_ERR(vport); |
1917 | if (IS_ERR(vport)) | |
d81eef1b | 1918 | goto exit_unlock_free; |
44e05eca | 1919 | |
6455100f | 1920 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 1921 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 1922 | err = -EINVAL; |
d81eef1b | 1923 | goto exit_unlock_free; |
c25ea534 JG |
1924 | } |
1925 | ||
17ec1d04 | 1926 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 1927 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 | 1928 | if (err) |
d81eef1b | 1929 | goto exit_unlock_free; |
17ec1d04 | 1930 | } |
1fc7083d JG |
1931 | |
1932 | if (a[OVS_VPORT_ATTR_STATS]) | |
1933 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
1934 | ||
beb1c69a AW |
1935 | |
1936 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
1937 | err = ovs_vport_set_upcall_portids(vport, | |
1938 | a[OVS_VPORT_ATTR_UPCALL_PID]); | |
1939 | if (err) | |
1940 | goto exit_unlock_free; | |
1941 | } | |
c19e6535 | 1942 | |
c25ea534 JG |
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); | |
cd2a59e9 | 1946 | ovs_unlock(); |
d81eef1b | 1947 | |
cb25142c | 1948 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
c25ea534 JG |
1949 | return 0; |
1950 | ||
d81eef1b | 1951 | exit_unlock_free: |
cd2a59e9 | 1952 | ovs_unlock(); |
d81eef1b | 1953 | kfree_skb(reply); |
c19e6535 | 1954 | return err; |
064af421 BP |
1955 | } |
1956 | ||
df2c07f4 | 1957 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1958 | { |
f0fef760 BP |
1959 | struct nlattr **a = info->attrs; |
1960 | struct sk_buff *reply; | |
c19e6535 | 1961 | struct vport *vport; |
c19e6535 BP |
1962 | int err; |
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 | 1970 | err = PTR_ERR(vport); |
f0fef760 | 1971 | if (IS_ERR(vport)) |
d81eef1b | 1972 | goto exit_unlock_free; |
c19e6535 | 1973 | |
df2c07f4 | 1974 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 | 1975 | err = -EINVAL; |
d81eef1b | 1976 | goto exit_unlock_free; |
f0fef760 BP |
1977 | } |
1978 | ||
d81eef1b JR |
1979 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1980 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
1981 | BUG_ON(err < 0); | |
850b6b3b | 1982 | ovs_dp_detach_port(vport); |
d81eef1b | 1983 | ovs_unlock(); |
f0fef760 | 1984 | |
cb25142c | 1985 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 1986 | return 0; |
f0fef760 | 1987 | |
d81eef1b | 1988 | exit_unlock_free: |
cd2a59e9 | 1989 | ovs_unlock(); |
d81eef1b | 1990 | kfree_skb(reply); |
c19e6535 | 1991 | return err; |
7c40efc9 BP |
1992 | } |
1993 | ||
df2c07f4 | 1994 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1995 | { |
f0fef760 | 1996 | struct nlattr **a = info->attrs; |
df2c07f4 | 1997 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 1998 | struct sk_buff *reply; |
c19e6535 | 1999 | struct vport *vport; |
c19e6535 BP |
2000 | int err; |
2001 | ||
d81eef1b JR |
2002 | reply = ovs_vport_cmd_alloc_info(); |
2003 | if (!reply) | |
2004 | return -ENOMEM; | |
2005 | ||
ed099e92 | 2006 | rcu_read_lock(); |
2a4999f3 | 2007 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2008 | err = PTR_ERR(vport); |
2009 | if (IS_ERR(vport)) | |
d81eef1b JR |
2010 | goto exit_unlock_free; |
2011 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
2012 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2013 | BUG_ON(err < 0); | |
df2fa9b5 JG |
2014 | rcu_read_unlock(); |
2015 | ||
2016 | return genlmsg_reply(reply, info); | |
ed099e92 | 2017 | |
d81eef1b | 2018 | exit_unlock_free: |
ed099e92 | 2019 | rcu_read_unlock(); |
d81eef1b | 2020 | kfree_skb(reply); |
c19e6535 BP |
2021 | return err; |
2022 | } | |
2023 | ||
df2c07f4 | 2024 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2025 | { |
df2c07f4 | 2026 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2027 | struct datapath *dp; |
95b1d73a PS |
2028 | int bucket = cb->args[0], skip = cb->args[1]; |
2029 | int i, j = 0; | |
c19e6535 | 2030 | |
03fc2881 | 2031 | rcu_read_lock(); |
01ac0970 | 2032 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
03fc2881 JR |
2033 | if (!dp) { |
2034 | rcu_read_unlock(); | |
f0fef760 | 2035 | return -ENODEV; |
03fc2881 | 2036 | } |
95b1d73a | 2037 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2038 | struct vport *vport; |
95b1d73a PS |
2039 | |
2040 | j = 0; | |
f8dfbcb7 | 2041 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2042 | if (j >= skip && |
2043 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 2044 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2045 | cb->nlh->nlmsg_seq, |
2046 | NLM_F_MULTI, | |
2047 | OVS_VPORT_CMD_NEW) < 0) | |
2048 | goto out; | |
2049 | ||
2050 | j++; | |
2051 | } | |
2052 | skip = 0; | |
c19e6535 | 2053 | } |
95b1d73a | 2054 | out: |
ed099e92 | 2055 | rcu_read_unlock(); |
c19e6535 | 2056 | |
95b1d73a PS |
2057 | cb->args[0] = i; |
2058 | cb->args[1] = j; | |
f0fef760 | 2059 | |
95b1d73a | 2060 | return skb->len; |
7c40efc9 BP |
2061 | } |
2062 | ||
cb25142c PS |
2063 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2064 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2065 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2066 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2067 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2068 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2069 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2070 | }; | |
2071 | ||
f0fef760 | 2072 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2073 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
2074 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2075 | .policy = vport_policy, | |
df2c07f4 | 2076 | .doit = ovs_vport_cmd_new |
f0fef760 | 2077 | }, |
df2c07f4 | 2078 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
2079 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2080 | .policy = vport_policy, | |
df2c07f4 | 2081 | .doit = ovs_vport_cmd_del |
f0fef760 | 2082 | }, |
df2c07f4 | 2083 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2084 | .flags = 0, /* OK for unprivileged users. */ |
2085 | .policy = vport_policy, | |
df2c07f4 JP |
2086 | .doit = ovs_vport_cmd_get, |
2087 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2088 | }, |
df2c07f4 | 2089 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
2090 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2091 | .policy = vport_policy, | |
df2c07f4 | 2092 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2093 | }, |
2094 | }; | |
2095 | ||
cb25142c PS |
2096 | struct genl_family dp_vport_genl_family = { |
2097 | .id = GENL_ID_GENERATE, | |
2098 | .hdrsize = sizeof(struct ovs_header), | |
2099 | .name = OVS_VPORT_FAMILY, | |
2100 | .version = OVS_VPORT_VERSION, | |
2101 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2102 | .netnsok = true, | |
2103 | .parallel_ops = true, | |
2104 | .ops = dp_vport_genl_ops, | |
2105 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2106 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2107 | .n_mcgrps = 1, | |
982b8810 | 2108 | }; |
ed099e92 | 2109 | |
cb25142c PS |
2110 | static struct genl_family *dp_genl_families[] = { |
2111 | &dp_datapath_genl_family, | |
2112 | &dp_vport_genl_family, | |
2113 | &dp_flow_genl_family, | |
2114 | &dp_packet_genl_family, | |
982b8810 | 2115 | }; |
ed099e92 | 2116 | |
982b8810 BP |
2117 | static void dp_unregister_genl(int n_families) |
2118 | { | |
2119 | int i; | |
ed099e92 | 2120 | |
b867ca75 | 2121 | for (i = 0; i < n_families; i++) |
cb25142c | 2122 | genl_unregister_family(dp_genl_families[i]); |
ed099e92 BP |
2123 | } |
2124 | ||
982b8810 | 2125 | static int dp_register_genl(void) |
064af421 | 2126 | { |
982b8810 BP |
2127 | int err; |
2128 | int i; | |
064af421 | 2129 | |
982b8810 | 2130 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
064af421 | 2131 | |
cb25142c | 2132 | err = genl_register_family(dp_genl_families[i]); |
982b8810 BP |
2133 | if (err) |
2134 | goto error; | |
982b8810 | 2135 | } |
9cc8b4e4 | 2136 | |
982b8810 | 2137 | return 0; |
064af421 BP |
2138 | |
2139 | error: | |
cb25142c | 2140 | dp_unregister_genl(i); |
982b8810 | 2141 | return err; |
064af421 BP |
2142 | } |
2143 | ||
2a4999f3 PS |
2144 | static int __net_init ovs_init_net(struct net *net) |
2145 | { | |
2146 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2147 | ||
2148 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 2149 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
2a4999f3 PS |
2150 | return 0; |
2151 | } | |
2152 | ||
2153 | static void __net_exit ovs_exit_net(struct net *net) | |
2154 | { | |
cd2a59e9 | 2155 | struct datapath *dp, *dp_next; |
2a4999f3 PS |
2156 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
2157 | ||
cd2a59e9 PS |
2158 | ovs_lock(); |
2159 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2160 | __dp_destroy(dp); | |
2161 | ovs_unlock(); | |
2162 | ||
2163 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
2164 | } |
2165 | ||
2166 | static struct pernet_operations ovs_net_ops = { | |
2167 | .init = ovs_init_net, | |
2168 | .exit = ovs_exit_net, | |
2169 | .id = &ovs_net_id, | |
2170 | .size = sizeof(struct ovs_net), | |
2171 | }; | |
2172 | ||
637c8268 PS |
2173 | DEFINE_COMPAT_PNET_REG_FUNC(device); |
2174 | ||
22d24ebf BP |
2175 | static int __init dp_init(void) |
2176 | { | |
2177 | int err; | |
2178 | ||
f3d85db3 | 2179 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2180 | |
dc5f3fef | 2181 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 2182 | VERSION); |
064af421 | 2183 | |
850b6b3b | 2184 | err = ovs_flow_init(); |
3544358a | 2185 | if (err) |
533e96e7 | 2186 | goto error; |
3544358a | 2187 | |
850b6b3b | 2188 | err = ovs_vport_init(); |
064af421 BP |
2189 | if (err) |
2190 | goto error_flow_exit; | |
2191 | ||
2a4999f3 | 2192 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2193 | if (err) |
2194 | goto error_vport_exit; | |
2195 | ||
2a4999f3 PS |
2196 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2197 | if (err) | |
2198 | goto error_netns_exit; | |
2199 | ||
982b8810 BP |
2200 | err = dp_register_genl(); |
2201 | if (err < 0) | |
37a1300c | 2202 | goto error_unreg_notifier; |
982b8810 | 2203 | |
064af421 BP |
2204 | return 0; |
2205 | ||
2206 | error_unreg_notifier: | |
850b6b3b | 2207 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2208 | error_netns_exit: |
2209 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2210 | error_vport_exit: |
850b6b3b | 2211 | ovs_vport_exit(); |
064af421 | 2212 | error_flow_exit: |
850b6b3b | 2213 | ovs_flow_exit(); |
064af421 BP |
2214 | error: |
2215 | return err; | |
2216 | } | |
2217 | ||
2218 | static void dp_cleanup(void) | |
2219 | { | |
982b8810 | 2220 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
850b6b3b | 2221 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2222 | unregister_pernet_device(&ovs_net_ops); |
2223 | rcu_barrier(); | |
850b6b3b JG |
2224 | ovs_vport_exit(); |
2225 | ovs_flow_exit(); | |
064af421 BP |
2226 | } |
2227 | ||
2228 | module_init(dp_init); | |
2229 | module_exit(dp_cleanup); | |
2230 | ||
2231 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2232 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2233 | MODULE_VERSION(VERSION); |