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Commit | Line | Data |
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064af421 | 1 | /* |
a1c564be | 2 | * Copyright (c) 2007-2013 Nicira, Inc. |
a14bc59f | 3 | * |
a9a29d22 JG |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
064af421 BP |
17 | */ |
18 | ||
dfffaef1 JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
064af421 BP |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> | |
064af421 | 23 | #include <linux/if_arp.h> |
064af421 BP |
24 | #include <linux/if_vlan.h> |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
982b8810 | 27 | #include <linux/jhash.h> |
064af421 BP |
28 | #include <linux/delay.h> |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
ed099e92 | 31 | #include <linux/genetlink.h> |
064af421 BP |
32 | #include <linux/kernel.h> |
33 | #include <linux/kthread.h> | |
064af421 BP |
34 | #include <linux/mutex.h> |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
39 | #include <linux/version.h> | |
40 | #include <linux/ethtool.h> | |
064af421 | 41 | #include <linux/wait.h> |
064af421 | 42 | #include <asm/div64.h> |
656a0e37 | 43 | #include <linux/highmem.h> |
064af421 BP |
44 | #include <linux/netfilter_bridge.h> |
45 | #include <linux/netfilter_ipv4.h> | |
46 | #include <linux/inetdevice.h> | |
47 | #include <linux/list.h> | |
077257b8 | 48 | #include <linux/openvswitch.h> |
064af421 | 49 | #include <linux/rculist.h> |
064af421 | 50 | #include <linux/dmi.h> |
cd2a59e9 PS |
51 | #include <linux/genetlink.h> |
52 | #include <net/genetlink.h> | |
36956a7d | 53 | #include <net/genetlink.h> |
2a4999f3 PS |
54 | #include <net/net_namespace.h> |
55 | #include <net/netns/generic.h> | |
064af421 | 56 | |
064af421 | 57 | #include "datapath.h" |
064af421 | 58 | #include "flow.h" |
a097c0b2 | 59 | #include "flow_netlink.h" |
303708cc | 60 | #include "vlan.h" |
f2459fe7 | 61 | #include "vport-internal_dev.h" |
d5de5b0d | 62 | #include "vport-netdev.h" |
064af421 | 63 | |
2a4999f3 PS |
64 | int ovs_net_id __read_mostly; |
65 | ||
e297c6b7 TG |
66 | static void ovs_notify(struct sk_buff *skb, struct genl_info *info, |
67 | struct genl_multicast_group *grp) | |
68 | { | |
69 | genl_notify(skb, genl_info_net(info), info->snd_portid, | |
70 | grp->id, info->nlhdr, GFP_KERNEL); | |
71 | } | |
72 | ||
ed099e92 BP |
73 | /** |
74 | * DOC: Locking: | |
064af421 | 75 | * |
cd2a59e9 PS |
76 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
77 | * operations on vports, etc.), Writes to other state (flow table | |
78 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
79 | * by ovs_lock. | |
ed099e92 BP |
80 | * |
81 | * Reads are protected by RCU. | |
82 | * | |
83 | * There are a few special cases (mostly stats) that have their own | |
84 | * synchronization but they nest under all of above and don't interact with | |
85 | * each other. | |
cd2a59e9 PS |
86 | * |
87 | * The RTNL lock nests inside ovs_mutex. | |
064af421 | 88 | */ |
ed099e92 | 89 | |
cd2a59e9 PS |
90 | static DEFINE_MUTEX(ovs_mutex); |
91 | ||
92 | void ovs_lock(void) | |
93 | { | |
94 | mutex_lock(&ovs_mutex); | |
95 | } | |
96 | ||
97 | void ovs_unlock(void) | |
98 | { | |
99 | mutex_unlock(&ovs_mutex); | |
100 | } | |
101 | ||
102 | #ifdef CONFIG_LOCKDEP | |
103 | int lockdep_ovsl_is_held(void) | |
104 | { | |
105 | if (debug_locks) | |
106 | return lockdep_is_held(&ovs_mutex); | |
107 | else | |
108 | return 1; | |
109 | } | |
110 | #endif | |
111 | ||
c19e6535 | 112 | static struct vport *new_vport(const struct vport_parms *); |
2a4999f3 | 113 | static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *, |
7257b535 | 114 | const struct dp_upcall_info *); |
2a4999f3 PS |
115 | static int queue_userspace_packet(struct net *, int dp_ifindex, |
116 | struct sk_buff *, | |
7257b535 | 117 | const struct dp_upcall_info *); |
064af421 | 118 | |
cd2a59e9 | 119 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 120 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
064af421 | 121 | { |
254f2dc8 BP |
122 | struct datapath *dp = NULL; |
123 | struct net_device *dev; | |
ed099e92 | 124 | |
254f2dc8 | 125 | rcu_read_lock(); |
2a4999f3 | 126 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
254f2dc8 | 127 | if (dev) { |
850b6b3b | 128 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 BP |
129 | if (vport) |
130 | dp = vport->dp; | |
131 | } | |
132 | rcu_read_unlock(); | |
133 | ||
134 | return dp; | |
064af421 | 135 | } |
064af421 | 136 | |
cd2a59e9 | 137 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 138 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 139 | { |
cd2a59e9 | 140 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
16b82e84 | 141 | return vport->ops->get_name(vport); |
f2459fe7 JG |
142 | } |
143 | ||
99769a40 JG |
144 | static int get_dpifindex(struct datapath *dp) |
145 | { | |
146 | struct vport *local; | |
147 | int ifindex; | |
148 | ||
149 | rcu_read_lock(); | |
150 | ||
95b1d73a | 151 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 152 | if (local) |
d5de5b0d | 153 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
99769a40 JG |
154 | else |
155 | ifindex = 0; | |
156 | ||
157 | rcu_read_unlock(); | |
158 | ||
159 | return ifindex; | |
160 | } | |
161 | ||
46c6a11d JG |
162 | static void destroy_dp_rcu(struct rcu_head *rcu) |
163 | { | |
164 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 165 | |
0585f7a8 | 166 | ovs_flow_tbl_destroy(&dp->table); |
46c6a11d | 167 | free_percpu(dp->stats_percpu); |
2a4999f3 | 168 | release_net(ovs_dp_get_net(dp)); |
95b1d73a | 169 | kfree(dp->ports); |
5ca1ba48 | 170 | kfree(dp); |
46c6a11d JG |
171 | } |
172 | ||
95b1d73a PS |
173 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
174 | u16 port_no) | |
175 | { | |
176 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
177 | } | |
178 | ||
179 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) | |
180 | { | |
181 | struct vport *vport; | |
95b1d73a PS |
182 | struct hlist_head *head; |
183 | ||
184 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 185 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
186 | if (vport->port_no == port_no) |
187 | return vport; | |
188 | } | |
189 | return NULL; | |
190 | } | |
191 | ||
cd2a59e9 | 192 | /* Called with ovs_mutex. */ |
c19e6535 | 193 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 194 | { |
f2459fe7 | 195 | struct vport *vport; |
f2459fe7 | 196 | |
850b6b3b | 197 | vport = ovs_vport_add(parms); |
c19e6535 BP |
198 | if (!IS_ERR(vport)) { |
199 | struct datapath *dp = parms->dp; | |
95b1d73a | 200 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 201 | |
95b1d73a | 202 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 203 | } |
c19e6535 | 204 | return vport; |
064af421 BP |
205 | } |
206 | ||
850b6b3b | 207 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 208 | { |
cd2a59e9 | 209 | ASSERT_OVSL(); |
064af421 | 210 | |
064af421 | 211 | /* First drop references to device. */ |
95b1d73a | 212 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 213 | |
7237e4f4 | 214 | /* Then destroy it. */ |
850b6b3b | 215 | ovs_vport_del(p); |
064af421 BP |
216 | } |
217 | ||
8819fac7 | 218 | /* Must be called with rcu_read_lock. */ |
850b6b3b | 219 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
220 | { |
221 | struct datapath *dp = p->dp; | |
3544358a | 222 | struct sw_flow *flow; |
064af421 | 223 | struct dp_stats_percpu *stats; |
52a23d92 | 224 | struct sw_flow_key key; |
e9141eec | 225 | u64 *stats_counter; |
4fa72a95 | 226 | u32 n_mask_hit; |
4c1ad233 | 227 | int error; |
064af421 | 228 | |
70dbc259 | 229 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 230 | |
52a23d92 | 231 | /* Extract flow from 'skb' into 'key'. */ |
a1c564be | 232 | error = ovs_flow_extract(skb, p->port_no, &key); |
52a23d92 JG |
233 | if (unlikely(error)) { |
234 | kfree_skb(skb); | |
235 | return; | |
55574bb0 BP |
236 | } |
237 | ||
52a23d92 | 238 | /* Look up flow. */ |
4f88b5e5 | 239 | flow = ovs_flow_tbl_lookup_stats(&dp->table, &key, &n_mask_hit); |
52a23d92 JG |
240 | if (unlikely(!flow)) { |
241 | struct dp_upcall_info upcall; | |
242 | ||
243 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
244 | upcall.key = &key; | |
245 | upcall.userdata = NULL; | |
246 | upcall.portid = p->upcall_portid; | |
247 | ovs_dp_upcall(dp, skb, &upcall); | |
248 | consume_skb(skb); | |
249 | stats_counter = &stats->n_missed; | |
250 | goto out; | |
251 | } | |
252 | ||
253 | OVS_CB(skb)->flow = flow; | |
d1d71a36 | 254 | OVS_CB(skb)->pkt_key = &key; |
52a23d92 | 255 | |
b0b906cc | 256 | ovs_flow_stats_update(OVS_CB(skb)->flow, skb); |
850b6b3b | 257 | ovs_execute_actions(dp, skb); |
b0b906cc | 258 | stats_counter = &stats->n_hit; |
55574bb0 | 259 | |
8819fac7 | 260 | out: |
55574bb0 | 261 | /* Update datapath statistics. */ |
821cb9fa | 262 | u64_stats_update_begin(&stats->sync); |
e9141eec | 263 | (*stats_counter)++; |
4fa72a95 | 264 | stats->n_mask_hit += n_mask_hit; |
821cb9fa | 265 | u64_stats_update_end(&stats->sync); |
064af421 BP |
266 | } |
267 | ||
aa5a8fdc JG |
268 | static struct genl_family dp_packet_genl_family = { |
269 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
270 | .hdrsize = sizeof(struct ovs_header), |
271 | .name = OVS_PACKET_FAMILY, | |
69685a88 | 272 | .version = OVS_PACKET_VERSION, |
2a4999f3 | 273 | .maxattr = OVS_PACKET_ATTR_MAX, |
b3dcb73c | 274 | .netnsok = true, |
14002a59 | 275 | SET_PARALLEL_OPS |
aa5a8fdc JG |
276 | }; |
277 | ||
850b6b3b JG |
278 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
279 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc JG |
280 | { |
281 | struct dp_stats_percpu *stats; | |
7257b535 | 282 | int dp_ifindex; |
aa5a8fdc JG |
283 | int err; |
284 | ||
28aea917 | 285 | if (upcall_info->portid == 0) { |
b063d9f0 | 286 | err = -ENOTCONN; |
b063d9f0 JG |
287 | goto err; |
288 | } | |
289 | ||
7257b535 BP |
290 | dp_ifindex = get_dpifindex(dp); |
291 | if (!dp_ifindex) { | |
292 | err = -ENODEV; | |
293 | goto err; | |
aa5a8fdc JG |
294 | } |
295 | ||
7257b535 | 296 | if (!skb_is_gso(skb)) |
2a4999f3 | 297 | err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
7257b535 | 298 | else |
2a4999f3 | 299 | err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
d76195db JG |
300 | if (err) |
301 | goto err; | |
302 | ||
303 | return 0; | |
aa5a8fdc | 304 | |
aa5a8fdc | 305 | err: |
70dbc259 | 306 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 307 | |
821cb9fa | 308 | u64_stats_update_begin(&stats->sync); |
aa5a8fdc | 309 | stats->n_lost++; |
821cb9fa | 310 | u64_stats_update_end(&stats->sync); |
aa5a8fdc | 311 | |
aa5a8fdc | 312 | return err; |
982b8810 BP |
313 | } |
314 | ||
2a4999f3 PS |
315 | static int queue_gso_packets(struct net *net, int dp_ifindex, |
316 | struct sk_buff *skb, | |
7257b535 | 317 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 318 | { |
d4cba1f8 | 319 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
320 | struct dp_upcall_info later_info; |
321 | struct sw_flow_key later_key; | |
322 | struct sk_buff *segs, *nskb; | |
323 | int err; | |
cb5087ca | 324 | |
0aa52d88 | 325 | segs = __skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM, false); |
79089764 PS |
326 | if (IS_ERR(segs)) |
327 | return PTR_ERR(segs); | |
99769a40 | 328 | |
7257b535 BP |
329 | /* Queue all of the segments. */ |
330 | skb = segs; | |
cb5087ca | 331 | do { |
2a4999f3 | 332 | err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info); |
982b8810 | 333 | if (err) |
7257b535 | 334 | break; |
856081f6 | 335 | |
d4cba1f8 | 336 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
e1cf87ff JG |
337 | /* The initial flow key extracted by ovs_flow_extract() |
338 | * in this case is for a first fragment, so we need to | |
7257b535 BP |
339 | * properly mark later fragments. |
340 | */ | |
341 | later_key = *upcall_info->key; | |
9e44d715 | 342 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
7257b535 BP |
343 | |
344 | later_info = *upcall_info; | |
345 | later_info.key = &later_key; | |
346 | upcall_info = &later_info; | |
347 | } | |
36ce148c | 348 | } while ((skb = skb->next)); |
cb5087ca | 349 | |
7257b535 BP |
350 | /* Free all of the segments. */ |
351 | skb = segs; | |
352 | do { | |
353 | nskb = skb->next; | |
354 | if (err) | |
355 | kfree_skb(skb); | |
356 | else | |
357 | consume_skb(skb); | |
358 | } while ((skb = nskb)); | |
359 | return err; | |
360 | } | |
361 | ||
0afa2373 TG |
362 | static size_t key_attr_size(void) |
363 | { | |
364 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
365 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ | |
366 | + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
367 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
368 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
369 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
370 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
371 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
372 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
373 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ | |
374 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
375 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
376 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
377 | + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */ | |
378 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
379 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
380 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
381 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
382 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
383 | } | |
384 | ||
385 | static size_t upcall_msg_size(const struct sk_buff *skb, | |
386 | const struct nlattr *userdata) | |
387 | { | |
388 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
389 | + nla_total_size(skb->len) /* OVS_PACKET_ATTR_PACKET */ | |
390 | + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */ | |
391 | ||
392 | /* OVS_PACKET_ATTR_USERDATA */ | |
393 | if (userdata) | |
394 | size += NLA_ALIGN(userdata->nla_len); | |
395 | ||
396 | return size; | |
397 | } | |
398 | ||
2a4999f3 PS |
399 | static int queue_userspace_packet(struct net *net, int dp_ifindex, |
400 | struct sk_buff *skb, | |
7257b535 BP |
401 | const struct dp_upcall_info *upcall_info) |
402 | { | |
403 | struct ovs_header *upcall; | |
6161d3fd | 404 | struct sk_buff *nskb = NULL; |
7257b535 BP |
405 | struct sk_buff *user_skb; /* to be queued to userspace */ |
406 | struct nlattr *nla; | |
68eadcf0 TG |
407 | struct genl_info info = { |
408 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0) | |
409 | .dst_sk = net->genl_sock, | |
410 | #endif | |
411 | .snd_portid = upcall_info->portid, | |
412 | }; | |
413 | size_t len; | |
7257b535 BP |
414 | int err; |
415 | ||
6161d3fd JG |
416 | if (vlan_tx_tag_present(skb)) { |
417 | nskb = skb_clone(skb, GFP_ATOMIC); | |
418 | if (!nskb) | |
419 | return -ENOMEM; | |
07ac71ea PS |
420 | |
421 | nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb)); | |
422 | if (!nskb) | |
423 | return -ENOMEM; | |
424 | ||
425 | vlan_set_tci(nskb, 0); | |
7257b535 | 426 | |
6161d3fd JG |
427 | skb = nskb; |
428 | } | |
429 | ||
430 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
431 | err = -EFBIG; | |
432 | goto out; | |
433 | } | |
7257b535 | 434 | |
68eadcf0 TG |
435 | len = upcall_msg_size(skb, upcall_info->userdata); |
436 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); | |
6161d3fd JG |
437 | if (!user_skb) { |
438 | err = -ENOMEM; | |
439 | goto out; | |
440 | } | |
7257b535 BP |
441 | |
442 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
443 | 0, upcall_info->cmd); | |
444 | upcall->dp_ifindex = dp_ifindex; | |
445 | ||
446 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
a097c0b2 | 447 | ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb); |
7257b535 BP |
448 | nla_nest_end(user_skb, nla); |
449 | ||
450 | if (upcall_info->userdata) | |
e995e3df | 451 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 452 | nla_len(upcall_info->userdata), |
e995e3df | 453 | nla_data(upcall_info->userdata)); |
7257b535 BP |
454 | |
455 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); | |
bed53bd1 PS |
456 | |
457 | skb_copy_and_csum_dev(skb, nla_data(nla)); | |
7257b535 | 458 | |
c39b1a5c | 459 | genlmsg_end(user_skb, upcall); |
28aea917 | 460 | err = genlmsg_unicast(net, user_skb, upcall_info->portid); |
6161d3fd JG |
461 | |
462 | out: | |
463 | kfree_skb(nskb); | |
464 | return err; | |
cb5087ca BP |
465 | } |
466 | ||
df2c07f4 | 467 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 468 | { |
df2c07f4 | 469 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 470 | struct nlattr **a = info->attrs; |
e0e57990 | 471 | struct sw_flow_actions *acts; |
982b8810 | 472 | struct sk_buff *packet; |
e0e57990 | 473 | struct sw_flow *flow; |
f7cd0081 | 474 | struct datapath *dp; |
d6569377 | 475 | struct ethhdr *eth; |
3f19d399 | 476 | int len; |
d6569377 | 477 | int err; |
064af421 | 478 | |
f7cd0081 | 479 | err = -EINVAL; |
df2c07f4 | 480 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 481 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 482 | goto err; |
064af421 | 483 | |
df2c07f4 | 484 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 485 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
486 | err = -ENOMEM; |
487 | if (!packet) | |
e5cad958 | 488 | goto err; |
3f19d399 BP |
489 | skb_reserve(packet, NET_IP_ALIGN); |
490 | ||
bf3d6fce | 491 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 492 | |
f7cd0081 BP |
493 | skb_reset_mac_header(packet); |
494 | eth = eth_hdr(packet); | |
064af421 | 495 | |
d6569377 BP |
496 | /* Normally, setting the skb 'protocol' field would be handled by a |
497 | * call to eth_type_trans(), but it assumes there's a sending | |
498 | * device, which we may not have. */ | |
7cd46155 | 499 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
f7cd0081 | 500 | packet->protocol = eth->h_proto; |
d6569377 | 501 | else |
f7cd0081 | 502 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 503 | |
e0e57990 | 504 | /* Build an sw_flow for sending this packet. */ |
b0f3a2fe | 505 | flow = ovs_flow_alloc(false); |
e0e57990 BP |
506 | err = PTR_ERR(flow); |
507 | if (IS_ERR(flow)) | |
e5cad958 | 508 | goto err_kfree_skb; |
064af421 | 509 | |
a1c564be | 510 | err = ovs_flow_extract(packet, -1, &flow->key); |
e0e57990 | 511 | if (err) |
9321954a | 512 | goto err_flow_free; |
e0e57990 | 513 | |
a097c0b2 | 514 | err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 | 515 | if (err) |
9321954a | 516 | goto err_flow_free; |
a097c0b2 | 517 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
e0e57990 BP |
518 | err = PTR_ERR(acts); |
519 | if (IS_ERR(acts)) | |
9321954a | 520 | goto err_flow_free; |
9b405f1a | 521 | |
a097c0b2 PS |
522 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
523 | &flow->key, 0, &acts); | |
e0e57990 | 524 | rcu_assign_pointer(flow->sf_acts, acts); |
9b405f1a PS |
525 | if (err) |
526 | goto err_flow_free; | |
e0e57990 BP |
527 | |
528 | OVS_CB(packet)->flow = flow; | |
d1d71a36 | 529 | OVS_CB(packet)->pkt_key = &flow->key; |
abff858b | 530 | packet->priority = flow->key.phy.priority; |
3025a772 | 531 | packet->mark = flow->key.phy.skb_mark; |
e0e57990 | 532 | |
d6569377 | 533 | rcu_read_lock(); |
2a4999f3 | 534 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 535 | err = -ENODEV; |
e5cad958 BP |
536 | if (!dp) |
537 | goto err_unlock; | |
cc4015df | 538 | |
e9141eec | 539 | local_bh_disable(); |
850b6b3b | 540 | err = ovs_execute_actions(dp, packet); |
e9141eec | 541 | local_bh_enable(); |
d6569377 | 542 | rcu_read_unlock(); |
e0e57990 | 543 | |
a1c564be | 544 | ovs_flow_free(flow, false); |
e5cad958 | 545 | return err; |
064af421 | 546 | |
e5cad958 BP |
547 | err_unlock: |
548 | rcu_read_unlock(); | |
9321954a | 549 | err_flow_free: |
a1c564be | 550 | ovs_flow_free(flow, false); |
e5cad958 BP |
551 | err_kfree_skb: |
552 | kfree_skb(packet); | |
553 | err: | |
d6569377 | 554 | return err; |
064af421 BP |
555 | } |
556 | ||
df2c07f4 | 557 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc | 558 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
df2c07f4 JP |
559 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
560 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
561 | }; |
562 | ||
563 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 564 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
565 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
566 | .policy = packet_policy, | |
df2c07f4 | 567 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
568 | } |
569 | }; | |
570 | ||
4fa72a95 AZ |
571 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats, |
572 | struct ovs_dp_megaflow_stats *mega_stats) | |
064af421 | 573 | { |
d6569377 | 574 | int i; |
f180c2e2 | 575 | |
4fa72a95 AZ |
576 | memset(mega_stats, 0, sizeof(*mega_stats)); |
577 | ||
994dc286 | 578 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
4fa72a95 | 579 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
064af421 | 580 | |
7257b535 | 581 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
4fa72a95 | 582 | |
d6569377 BP |
583 | for_each_possible_cpu(i) { |
584 | const struct dp_stats_percpu *percpu_stats; | |
585 | struct dp_stats_percpu local_stats; | |
821cb9fa | 586 | unsigned int start; |
44e05eca | 587 | |
d6569377 | 588 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 589 | |
d6569377 | 590 | do { |
821cb9fa | 591 | start = u64_stats_fetch_begin_bh(&percpu_stats->sync); |
d6569377 | 592 | local_stats = *percpu_stats; |
821cb9fa | 593 | } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); |
064af421 | 594 | |
d6569377 BP |
595 | stats->n_hit += local_stats.n_hit; |
596 | stats->n_missed += local_stats.n_missed; | |
597 | stats->n_lost += local_stats.n_lost; | |
4fa72a95 | 598 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
d6569377 BP |
599 | } |
600 | } | |
064af421 | 601 | |
df2c07f4 JP |
602 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
603 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
604 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
605 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 606 | }; |
36956a7d | 607 | |
37a1300c BP |
608 | static struct genl_family dp_flow_genl_family = { |
609 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
610 | .hdrsize = sizeof(struct ovs_header), |
611 | .name = OVS_FLOW_FAMILY, | |
69685a88 | 612 | .version = OVS_FLOW_VERSION, |
2a4999f3 | 613 | .maxattr = OVS_FLOW_ATTR_MAX, |
b3dcb73c | 614 | .netnsok = true, |
14002a59 | 615 | SET_PARALLEL_OPS |
37a1300c | 616 | }; |
ed099e92 | 617 | |
850b6b3b | 618 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { |
df2c07f4 | 619 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
620 | }; |
621 | ||
0afa2373 TG |
622 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
623 | { | |
624 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
625 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
a1c564be | 626 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */ |
0afa2373 TG |
627 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
628 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
629 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
630 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
631 | } | |
632 | ||
cd2a59e9 | 633 | /* Called with ovs_mutex. */ |
df2c07f4 | 634 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
28aea917 | 635 | struct sk_buff *skb, u32 portid, |
6455100f | 636 | u32 seq, u32 flags, u8 cmd) |
d6569377 | 637 | { |
37a1300c | 638 | const int skb_orig_len = skb->len; |
9b405f1a | 639 | struct nlattr *start; |
b0f3a2fe PS |
640 | struct ovs_flow_stats stats; |
641 | __be16 tcp_flags; | |
642 | unsigned long used; | |
df2c07f4 | 643 | struct ovs_header *ovs_header; |
d6569377 | 644 | struct nlattr *nla; |
d6569377 | 645 | int err; |
064af421 | 646 | |
28aea917 | 647 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
df2c07f4 | 648 | if (!ovs_header) |
37a1300c | 649 | return -EMSGSIZE; |
d6569377 | 650 | |
99769a40 | 651 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 652 | |
a1c564be | 653 | /* Fill flow key. */ |
df2c07f4 | 654 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
655 | if (!nla) |
656 | goto nla_put_failure; | |
a1c564be | 657 | |
a097c0b2 | 658 | err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb); |
d6569377 | 659 | if (err) |
37a1300c | 660 | goto error; |
d6569377 BP |
661 | nla_nest_end(skb, nla); |
662 | ||
a1c564be AZ |
663 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); |
664 | if (!nla) | |
665 | goto nla_put_failure; | |
666 | ||
a097c0b2 | 667 | err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb); |
a1c564be AZ |
668 | if (err) |
669 | goto error; | |
670 | ||
671 | nla_nest_end(skb, nla); | |
672 | ||
b0f3a2fe PS |
673 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
674 | if (used && | |
675 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
c3cc8c03 | 676 | goto nla_put_failure; |
d6569377 | 677 | |
b0f3a2fe PS |
678 | if (stats.n_packets && |
679 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) | |
680 | goto nla_put_failure; | |
b0b906cc | 681 | |
b0f3a2fe PS |
682 | if ((u8)ntohs(tcp_flags) && |
683 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
c3cc8c03 | 684 | goto nla_put_failure; |
d6569377 | 685 | |
df2c07f4 | 686 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
687 | * this is the first flow to be dumped into 'skb'. This is unusual for |
688 | * Netlink but individual action lists can be longer than | |
689 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
690 | * The userspace caller can always fetch the actions separately if it | |
691 | * really wants them. (Most userspace callers in fact don't care.) | |
692 | * | |
693 | * This can only fail for dump operations because the skb is always | |
694 | * properly sized for single flows. | |
695 | */ | |
9b405f1a | 696 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 697 | if (start) { |
f44ccce1 PS |
698 | const struct sw_flow_actions *sf_acts; |
699 | ||
780ec6ae | 700 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
f44ccce1 | 701 | |
a097c0b2 PS |
702 | err = ovs_nla_put_actions(sf_acts->actions, |
703 | sf_acts->actions_len, skb); | |
0a25b039 BP |
704 | if (!err) |
705 | nla_nest_end(skb, start); | |
706 | else { | |
707 | if (skb_orig_len) | |
708 | goto error; | |
709 | ||
710 | nla_nest_cancel(skb, start); | |
711 | } | |
7aac03bd JG |
712 | } else if (skb_orig_len) |
713 | goto nla_put_failure; | |
37a1300c | 714 | |
df2c07f4 | 715 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
716 | |
717 | nla_put_failure: | |
718 | err = -EMSGSIZE; | |
37a1300c | 719 | error: |
df2c07f4 | 720 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 721 | return err; |
44e05eca BP |
722 | } |
723 | ||
68eadcf0 TG |
724 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow, |
725 | struct genl_info *info) | |
44e05eca | 726 | { |
68eadcf0 | 727 | size_t len; |
d6569377 | 728 | |
68eadcf0 | 729 | len = ovs_flow_cmd_msg_size(ovsl_dereference(flow->sf_acts)); |
d6569377 | 730 | |
68eadcf0 | 731 | return genlmsg_new_unicast(len, info, GFP_KERNEL); |
37a1300c | 732 | } |
8d5ebd83 | 733 | |
6455100f PS |
734 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, |
735 | struct datapath *dp, | |
68eadcf0 TG |
736 | struct genl_info *info, |
737 | u8 cmd) | |
37a1300c BP |
738 | { |
739 | struct sk_buff *skb; | |
740 | int retval; | |
d6569377 | 741 | |
68eadcf0 | 742 | skb = ovs_flow_cmd_alloc_info(flow, info); |
37a1300c BP |
743 | if (!skb) |
744 | return ERR_PTR(-ENOMEM); | |
d6569377 | 745 | |
68eadcf0 TG |
746 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, info->snd_portid, |
747 | info->snd_seq, 0, cmd); | |
37a1300c | 748 | BUG_ON(retval < 0); |
d6569377 | 749 | return skb; |
064af421 BP |
750 | } |
751 | ||
df2c07f4 | 752 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 753 | { |
37a1300c | 754 | struct nlattr **a = info->attrs; |
df2c07f4 | 755 | struct ovs_header *ovs_header = info->userhdr; |
529db635 | 756 | struct sw_flow_key key, masked_key; |
a1c564be AZ |
757 | struct sw_flow *flow = NULL; |
758 | struct sw_flow_mask mask; | |
37a1300c | 759 | struct sk_buff *reply; |
9c52546b | 760 | struct datapath *dp; |
9b405f1a | 761 | struct sw_flow_actions *acts = NULL; |
a1c564be | 762 | struct sw_flow_match match; |
b0f3a2fe | 763 | bool exact_5tuple; |
bc4a05c6 | 764 | int error; |
064af421 | 765 | |
37a1300c BP |
766 | /* Extract key. */ |
767 | error = -EINVAL; | |
df2c07f4 | 768 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 769 | goto error; |
a1c564be AZ |
770 | |
771 | ovs_match_init(&match, &key, &mask); | |
b0f3a2fe | 772 | error = ovs_nla_get_match(&match, &exact_5tuple, |
a097c0b2 | 773 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); |
37a1300c BP |
774 | if (error) |
775 | goto error; | |
064af421 | 776 | |
37a1300c | 777 | /* Validate actions. */ |
df2c07f4 | 778 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
a097c0b2 | 779 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
9b405f1a PS |
780 | error = PTR_ERR(acts); |
781 | if (IS_ERR(acts)) | |
37a1300c | 782 | goto error; |
9b405f1a | 783 | |
a097c0b2 PS |
784 | ovs_flow_mask_key(&masked_key, &key, &mask); |
785 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], | |
786 | &masked_key, 0, &acts); | |
529db635 JG |
787 | if (error) { |
788 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
9b405f1a | 789 | goto err_kfree; |
529db635 | 790 | } |
df2c07f4 | 791 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
792 | error = -EINVAL; |
793 | goto error; | |
794 | } | |
795 | ||
cd2a59e9 | 796 | ovs_lock(); |
2a4999f3 | 797 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
d6569377 | 798 | error = -ENODEV; |
9c52546b | 799 | if (!dp) |
cd2a59e9 | 800 | goto err_unlock_ovs; |
704a1e09 | 801 | |
a1c564be | 802 | /* Check if this is a duplicate flow */ |
4f88b5e5 | 803 | flow = ovs_flow_tbl_lookup(&dp->table, &key); |
3544358a | 804 | if (!flow) { |
d6569377 BP |
805 | /* Bail out if we're not allowed to create a new flow. */ |
806 | error = -ENOENT; | |
df2c07f4 | 807 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
cd2a59e9 | 808 | goto err_unlock_ovs; |
d6569377 | 809 | |
d6569377 | 810 | /* Allocate flow. */ |
b0f3a2fe | 811 | flow = ovs_flow_alloc(!exact_5tuple); |
d6569377 BP |
812 | if (IS_ERR(flow)) { |
813 | error = PTR_ERR(flow); | |
cd2a59e9 | 814 | goto err_unlock_ovs; |
d6569377 | 815 | } |
d6569377 | 816 | |
529db635 JG |
817 | flow->key = masked_key; |
818 | flow->unmasked_key = key; | |
d6569377 BP |
819 | rcu_assign_pointer(flow->sf_acts, acts); |
820 | ||
d6569377 | 821 | /* Put flow in bucket. */ |
0585f7a8 PS |
822 | error = ovs_flow_tbl_insert(&dp->table, flow, &mask); |
823 | if (error) { | |
824 | acts = NULL; | |
825 | goto err_flow_free; | |
826 | } | |
37a1300c | 827 | |
68eadcf0 | 828 | reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW); |
d6569377 BP |
829 | } else { |
830 | /* We found a matching flow. */ | |
831 | struct sw_flow_actions *old_acts; | |
832 | ||
833 | /* Bail out if we're not allowed to modify an existing flow. | |
834 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
835 | * because Generic Netlink treats the latter as a dump | |
836 | * request. We also accept NLM_F_EXCL in case that bug ever | |
837 | * gets fixed. | |
838 | */ | |
839 | error = -EEXIST; | |
df2c07f4 | 840 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c | 841 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
cd2a59e9 | 842 | goto err_unlock_ovs; |
d6569377 | 843 | |
b21e5b6a AZ |
844 | /* The unmasked key has to be the same for flow updates. */ |
845 | error = -EINVAL; | |
a097c0b2 | 846 | if (!ovs_flow_cmp_unmasked_key(flow, &match)) { |
1b936472 | 847 | OVS_NLERR("Flow modification message rejected, unmasked key does not match.\n"); |
b21e5b6a | 848 | goto err_unlock_ovs; |
1b936472 | 849 | } |
b21e5b6a | 850 | |
d6569377 | 851 | /* Update actions. */ |
cd2a59e9 | 852 | old_acts = ovsl_dereference(flow->sf_acts); |
9b405f1a | 853 | rcu_assign_pointer(flow->sf_acts, acts); |
a097c0b2 | 854 | ovs_nla_free_flow_actions(old_acts); |
d6569377 | 855 | |
68eadcf0 | 856 | reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW); |
d6569377 BP |
857 | |
858 | /* Clear stats. */ | |
b0b906cc PS |
859 | if (a[OVS_FLOW_ATTR_CLEAR]) |
860 | ovs_flow_stats_clear(flow); | |
9c52546b | 861 | } |
cd2a59e9 | 862 | ovs_unlock(); |
37a1300c BP |
863 | |
864 | if (!IS_ERR(reply)) | |
e297c6b7 | 865 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
37a1300c | 866 | else |
b3dcb73c | 867 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, |
2a4999f3 | 868 | ovs_dp_flow_multicast_group.id, PTR_ERR(reply)); |
d6569377 | 869 | return 0; |
704a1e09 | 870 | |
a1c564be AZ |
871 | err_flow_free: |
872 | ovs_flow_free(flow, false); | |
cd2a59e9 PS |
873 | err_unlock_ovs: |
874 | ovs_unlock(); | |
9b405f1a | 875 | err_kfree: |
ba400435 | 876 | kfree(acts); |
37a1300c | 877 | error: |
9c52546b | 878 | return error; |
704a1e09 BP |
879 | } |
880 | ||
df2c07f4 | 881 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 882 | { |
37a1300c | 883 | struct nlattr **a = info->attrs; |
df2c07f4 | 884 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 885 | struct sw_flow_key key; |
37a1300c | 886 | struct sk_buff *reply; |
704a1e09 | 887 | struct sw_flow *flow; |
9c52546b | 888 | struct datapath *dp; |
a1c564be | 889 | struct sw_flow_match match; |
9c52546b | 890 | int err; |
704a1e09 | 891 | |
1b936472 AZ |
892 | if (!a[OVS_FLOW_ATTR_KEY]) { |
893 | OVS_NLERR("Flow get message rejected, Key attribute missing.\n"); | |
37a1300c | 894 | return -EINVAL; |
1b936472 | 895 | } |
a1c564be AZ |
896 | |
897 | ovs_match_init(&match, &key, NULL); | |
b0f3a2fe | 898 | err = ovs_nla_get_match(&match, NULL, a[OVS_FLOW_ATTR_KEY], NULL); |
37a1300c BP |
899 | if (err) |
900 | return err; | |
704a1e09 | 901 | |
cd2a59e9 | 902 | ovs_lock(); |
2a4999f3 | 903 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
904 | if (!dp) { |
905 | err = -ENODEV; | |
906 | goto unlock; | |
907 | } | |
704a1e09 | 908 | |
4f88b5e5 | 909 | flow = ovs_flow_tbl_lookup(&dp->table, &key); |
a097c0b2 | 910 | if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) { |
cd2a59e9 PS |
911 | err = -ENOENT; |
912 | goto unlock; | |
913 | } | |
d6569377 | 914 | |
68eadcf0 | 915 | reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW); |
cd2a59e9 PS |
916 | if (IS_ERR(reply)) { |
917 | err = PTR_ERR(reply); | |
918 | goto unlock; | |
919 | } | |
36956a7d | 920 | |
cd2a59e9 | 921 | ovs_unlock(); |
37a1300c | 922 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
923 | unlock: |
924 | ovs_unlock(); | |
925 | return err; | |
d6569377 | 926 | } |
9c52546b | 927 | |
df2c07f4 | 928 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 929 | { |
37a1300c | 930 | struct nlattr **a = info->attrs; |
df2c07f4 | 931 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 932 | struct sw_flow_key key; |
37a1300c | 933 | struct sk_buff *reply; |
d6569377 | 934 | struct sw_flow *flow; |
d6569377 | 935 | struct datapath *dp; |
a1c564be | 936 | struct sw_flow_match match; |
d6569377 | 937 | int err; |
36956a7d | 938 | |
cd2a59e9 | 939 | ovs_lock(); |
2a4999f3 | 940 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
941 | if (!dp) { |
942 | err = -ENODEV; | |
943 | goto unlock; | |
944 | } | |
2a4999f3 | 945 | |
cd2a59e9 | 946 | if (!a[OVS_FLOW_ATTR_KEY]) { |
994dc286 | 947 | err = ovs_flow_tbl_flush(&dp->table); |
cd2a59e9 PS |
948 | goto unlock; |
949 | } | |
a1c564be AZ |
950 | |
951 | ovs_match_init(&match, &key, NULL); | |
b0f3a2fe | 952 | err = ovs_nla_get_match(&match, NULL, a[OVS_FLOW_ATTR_KEY], NULL); |
37a1300c | 953 | if (err) |
cd2a59e9 | 954 | goto unlock; |
d6569377 | 955 | |
4f88b5e5 | 956 | flow = ovs_flow_tbl_lookup(&dp->table, &key); |
a097c0b2 | 957 | if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) { |
cd2a59e9 PS |
958 | err = -ENOENT; |
959 | goto unlock; | |
960 | } | |
d6569377 | 961 | |
68eadcf0 | 962 | reply = ovs_flow_cmd_alloc_info(flow, info); |
cd2a59e9 PS |
963 | if (!reply) { |
964 | err = -ENOMEM; | |
965 | goto unlock; | |
966 | } | |
37a1300c | 967 | |
994dc286 | 968 | ovs_flow_tbl_remove(&dp->table, flow); |
37a1300c | 969 | |
28aea917 | 970 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid, |
df2c07f4 | 971 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); |
37a1300c BP |
972 | BUG_ON(err < 0); |
973 | ||
a1c564be | 974 | ovs_flow_free(flow, true); |
cd2a59e9 | 975 | ovs_unlock(); |
37a1300c | 976 | |
e297c6b7 | 977 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
37a1300c | 978 | return 0; |
cd2a59e9 PS |
979 | unlock: |
980 | ovs_unlock(); | |
981 | return err; | |
37a1300c BP |
982 | } |
983 | ||
df2c07f4 | 984 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 985 | { |
df2c07f4 | 986 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
994dc286 | 987 | struct table_instance *ti; |
37a1300c BP |
988 | struct datapath *dp; |
989 | ||
f44ccce1 | 990 | rcu_read_lock(); |
2a4999f3 | 991 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 992 | if (!dp) { |
f44ccce1 | 993 | rcu_read_unlock(); |
37a1300c | 994 | return -ENODEV; |
cd2a59e9 | 995 | } |
37a1300c | 996 | |
994dc286 | 997 | ti = rcu_dereference(dp->table.ti); |
37a1300c | 998 | for (;;) { |
37a1300c BP |
999 | struct sw_flow *flow; |
1000 | u32 bucket, obj; | |
1001 | ||
1002 | bucket = cb->args[0]; | |
1003 | obj = cb->args[1]; | |
994dc286 | 1004 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
3544358a | 1005 | if (!flow) |
37a1300c BP |
1006 | break; |
1007 | ||
6455100f | 1008 | if (ovs_flow_cmd_fill_info(flow, dp, skb, |
28aea917 | 1009 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1010 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1011 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1012 | break; |
1013 | ||
1014 | cb->args[0] = bucket; | |
1015 | cb->args[1] = obj; | |
1016 | } | |
f44ccce1 | 1017 | rcu_read_unlock(); |
37a1300c | 1018 | return skb->len; |
704a1e09 BP |
1019 | } |
1020 | ||
37a1300c | 1021 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1022 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1023 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1024 | .policy = flow_policy, | |
df2c07f4 | 1025 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1026 | }, |
df2c07f4 | 1027 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1028 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1029 | .policy = flow_policy, | |
df2c07f4 | 1030 | .doit = ovs_flow_cmd_del |
37a1300c | 1031 | }, |
df2c07f4 | 1032 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1033 | .flags = 0, /* OK for unprivileged users. */ |
1034 | .policy = flow_policy, | |
df2c07f4 JP |
1035 | .doit = ovs_flow_cmd_get, |
1036 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1037 | }, |
df2c07f4 | 1038 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1039 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1040 | .policy = flow_policy, | |
df2c07f4 | 1041 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1042 | }, |
1043 | }; | |
1044 | ||
df2c07f4 | 1045 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
df2c07f4 | 1046 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
b063d9f0 | 1047 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
c58cc9a4 | 1048 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, |
d6569377 BP |
1049 | }; |
1050 | ||
aaff4b55 BP |
1051 | static struct genl_family dp_datapath_genl_family = { |
1052 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1053 | .hdrsize = sizeof(struct ovs_header), |
1054 | .name = OVS_DATAPATH_FAMILY, | |
69685a88 | 1055 | .version = OVS_DATAPATH_VERSION, |
2a4999f3 | 1056 | .maxattr = OVS_DP_ATTR_MAX, |
b3dcb73c | 1057 | .netnsok = true, |
14002a59 | 1058 | SET_PARALLEL_OPS |
aaff4b55 BP |
1059 | }; |
1060 | ||
850b6b3b | 1061 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
df2c07f4 | 1062 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1063 | }; |
1064 | ||
0afa2373 TG |
1065 | static size_t ovs_dp_cmd_msg_size(void) |
1066 | { | |
1067 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1068 | ||
1069 | msgsize += nla_total_size(IFNAMSIZ); | |
1070 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
4fa72a95 | 1071 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
0afa2373 TG |
1072 | |
1073 | return msgsize; | |
1074 | } | |
1075 | ||
df2c07f4 | 1076 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1077 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1078 | { |
df2c07f4 | 1079 | struct ovs_header *ovs_header; |
e926dfe3 | 1080 | struct ovs_dp_stats dp_stats; |
4fa72a95 | 1081 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
064af421 BP |
1082 | int err; |
1083 | ||
28aea917 | 1084 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1085 | flags, cmd); |
df2c07f4 | 1086 | if (!ovs_header) |
aaff4b55 | 1087 | goto error; |
064af421 | 1088 | |
b063d9f0 | 1089 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1090 | |
d6569377 | 1091 | rcu_read_lock(); |
850b6b3b | 1092 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
d6569377 | 1093 | rcu_read_unlock(); |
064af421 | 1094 | if (err) |
d6569377 | 1095 | goto nla_put_failure; |
064af421 | 1096 | |
4fa72a95 AZ |
1097 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1098 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1099 | &dp_stats)) | |
1100 | goto nla_put_failure; | |
1101 | ||
1102 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1103 | sizeof(struct ovs_dp_megaflow_stats), | |
1104 | &dp_megaflow_stats)) | |
c3cc8c03 | 1105 | goto nla_put_failure; |
d6569377 | 1106 | |
c58cc9a4 TG |
1107 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1108 | goto nla_put_failure; | |
1109 | ||
df2c07f4 | 1110 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1111 | |
1112 | nla_put_failure: | |
df2c07f4 | 1113 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1114 | error: |
1115 | return -EMSGSIZE; | |
d6569377 BP |
1116 | } |
1117 | ||
68eadcf0 TG |
1118 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, |
1119 | struct genl_info *info, u8 cmd) | |
d6569377 | 1120 | { |
d6569377 | 1121 | struct sk_buff *skb; |
aaff4b55 | 1122 | int retval; |
d6569377 | 1123 | |
68eadcf0 | 1124 | skb = genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
064af421 | 1125 | if (!skb) |
d6569377 | 1126 | return ERR_PTR(-ENOMEM); |
659586ef | 1127 | |
68eadcf0 | 1128 | retval = ovs_dp_cmd_fill_info(dp, skb, info->snd_portid, info->snd_seq, 0, cmd); |
aaff4b55 BP |
1129 | if (retval < 0) { |
1130 | kfree_skb(skb); | |
1131 | return ERR_PTR(retval); | |
1132 | } | |
1133 | return skb; | |
1134 | } | |
9dca7bd5 | 1135 | |
cd2a59e9 | 1136 | /* Called with ovs_mutex. */ |
2a4999f3 PS |
1137 | static struct datapath *lookup_datapath(struct net *net, |
1138 | struct ovs_header *ovs_header, | |
6455100f | 1139 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1140 | { |
254f2dc8 BP |
1141 | struct datapath *dp; |
1142 | ||
df2c07f4 | 1143 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1144 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1145 | else { |
d6569377 | 1146 | struct vport *vport; |
d6569377 | 1147 | |
057dd6d2 | 1148 | rcu_read_lock(); |
2a4999f3 | 1149 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1150 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
057dd6d2 | 1151 | rcu_read_unlock(); |
d6569377 | 1152 | } |
254f2dc8 | 1153 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1154 | } |
1155 | ||
c58cc9a4 TG |
1156 | static void ovs_dp_change(struct datapath *dp, struct nlattr **a) |
1157 | { | |
1158 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1159 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1160 | } | |
1161 | ||
df2c07f4 | 1162 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1163 | { |
aaff4b55 | 1164 | struct nlattr **a = info->attrs; |
d6569377 | 1165 | struct vport_parms parms; |
aaff4b55 | 1166 | struct sk_buff *reply; |
d6569377 BP |
1167 | struct datapath *dp; |
1168 | struct vport *vport; | |
2a4999f3 | 1169 | struct ovs_net *ovs_net; |
95b1d73a | 1170 | int err, i; |
d6569377 | 1171 | |
d6569377 | 1172 | err = -EINVAL; |
ea36840f | 1173 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1174 | goto err; |
1175 | ||
cd2a59e9 | 1176 | ovs_lock(); |
d6569377 | 1177 | |
d6569377 BP |
1178 | err = -ENOMEM; |
1179 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1180 | if (dp == NULL) | |
cd2a59e9 | 1181 | goto err_unlock_ovs; |
2a4999f3 | 1182 | |
0ceaa66c JG |
1183 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1184 | ||
d6569377 | 1185 | /* Allocate table. */ |
994dc286 PS |
1186 | err = ovs_flow_tbl_init(&dp->table); |
1187 | if (err) | |
d6569377 BP |
1188 | goto err_free_dp; |
1189 | ||
99769a40 JG |
1190 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); |
1191 | if (!dp->stats_percpu) { | |
1192 | err = -ENOMEM; | |
1193 | goto err_destroy_table; | |
1194 | } | |
1195 | ||
95b1d73a PS |
1196 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1197 | GFP_KERNEL); | |
1198 | if (!dp->ports) { | |
1199 | err = -ENOMEM; | |
1200 | goto err_destroy_percpu; | |
1201 | } | |
1202 | ||
1203 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1204 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1205 | ||
d6569377 | 1206 | /* Set up our datapath device. */ |
df2c07f4 JP |
1207 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1208 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1209 | parms.options = NULL; |
1210 | parms.dp = dp; | |
df2c07f4 | 1211 | parms.port_no = OVSP_LOCAL; |
28aea917 | 1212 | parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
b063d9f0 | 1213 | |
c58cc9a4 TG |
1214 | ovs_dp_change(dp, a); |
1215 | ||
d6569377 BP |
1216 | vport = new_vport(&parms); |
1217 | if (IS_ERR(vport)) { | |
1218 | err = PTR_ERR(vport); | |
1219 | if (err == -EBUSY) | |
1220 | err = -EEXIST; | |
1221 | ||
95b1d73a | 1222 | goto err_destroy_ports_array; |
d6569377 | 1223 | } |
d6569377 | 1224 | |
68eadcf0 | 1225 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1226 | err = PTR_ERR(reply); |
1227 | if (IS_ERR(reply)) | |
1228 | goto err_destroy_local_port; | |
1229 | ||
2a4999f3 | 1230 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1231 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
d6569377 | 1232 | |
cd2a59e9 | 1233 | ovs_unlock(); |
d6569377 | 1234 | |
e297c6b7 | 1235 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
d6569377 BP |
1236 | return 0; |
1237 | ||
1238 | err_destroy_local_port: | |
cd2a59e9 | 1239 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
95b1d73a PS |
1240 | err_destroy_ports_array: |
1241 | kfree(dp->ports); | |
99769a40 JG |
1242 | err_destroy_percpu: |
1243 | free_percpu(dp->stats_percpu); | |
d6569377 | 1244 | err_destroy_table: |
0585f7a8 | 1245 | ovs_flow_tbl_destroy(&dp->table); |
d6569377 | 1246 | err_free_dp: |
0ceaa66c | 1247 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1248 | kfree(dp); |
cd2a59e9 PS |
1249 | err_unlock_ovs: |
1250 | ovs_unlock(); | |
d6569377 | 1251 | err: |
064af421 BP |
1252 | return err; |
1253 | } | |
1254 | ||
cd2a59e9 | 1255 | /* Called with ovs_mutex. */ |
2a4999f3 | 1256 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1257 | { |
95b1d73a | 1258 | int i; |
44e05eca | 1259 | |
95b1d73a PS |
1260 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1261 | struct vport *vport; | |
f8dfbcb7 | 1262 | struct hlist_node *n; |
95b1d73a | 1263 | |
f8dfbcb7 | 1264 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1265 | if (vport->port_no != OVSP_LOCAL) |
1266 | ovs_dp_detach_port(vport); | |
1267 | } | |
ed099e92 | 1268 | |
fb93e9aa | 1269 | list_del_rcu(&dp->list_node); |
ed099e92 | 1270 | |
cd2a59e9 PS |
1271 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
1272 | * all port in datapath are destroyed first before freeing datapath. | |
1273 | */ | |
1274 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); | |
99620d2c | 1275 | |
ed099e92 | 1276 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1277 | } |
1278 | ||
1279 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1280 | { | |
1281 | struct sk_buff *reply; | |
1282 | struct datapath *dp; | |
1283 | int err; | |
1284 | ||
cd2a59e9 | 1285 | ovs_lock(); |
2a4999f3 PS |
1286 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1287 | err = PTR_ERR(dp); | |
1288 | if (IS_ERR(dp)) | |
cd2a59e9 | 1289 | goto unlock; |
2a4999f3 | 1290 | |
68eadcf0 | 1291 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_DEL); |
2a4999f3 PS |
1292 | err = PTR_ERR(reply); |
1293 | if (IS_ERR(reply)) | |
cd2a59e9 | 1294 | goto unlock; |
2a4999f3 PS |
1295 | |
1296 | __dp_destroy(dp); | |
cd2a59e9 | 1297 | ovs_unlock(); |
ed099e92 | 1298 | |
e297c6b7 | 1299 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
99620d2c JG |
1300 | |
1301 | return 0; | |
cd2a59e9 PS |
1302 | unlock: |
1303 | ovs_unlock(); | |
1304 | return err; | |
44e05eca BP |
1305 | } |
1306 | ||
df2c07f4 | 1307 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1308 | { |
aaff4b55 | 1309 | struct sk_buff *reply; |
d6569377 | 1310 | struct datapath *dp; |
d6569377 | 1311 | int err; |
064af421 | 1312 | |
cd2a59e9 | 1313 | ovs_lock(); |
2a4999f3 | 1314 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1315 | err = PTR_ERR(dp); |
d6569377 | 1316 | if (IS_ERR(dp)) |
cd2a59e9 | 1317 | goto unlock; |
38c6ecbc | 1318 | |
c58cc9a4 TG |
1319 | ovs_dp_change(dp, info->attrs); |
1320 | ||
68eadcf0 | 1321 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1322 | if (IS_ERR(reply)) { |
1323 | err = PTR_ERR(reply); | |
b3dcb73c | 1324 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, |
850b6b3b | 1325 | ovs_dp_datapath_multicast_group.id, err); |
cd2a59e9 PS |
1326 | err = 0; |
1327 | goto unlock; | |
aaff4b55 BP |
1328 | } |
1329 | ||
cd2a59e9 | 1330 | ovs_unlock(); |
e297c6b7 | 1331 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
850b6b3b | 1332 | |
aaff4b55 | 1333 | return 0; |
cd2a59e9 PS |
1334 | unlock: |
1335 | ovs_unlock(); | |
1336 | return err; | |
064af421 BP |
1337 | } |
1338 | ||
df2c07f4 | 1339 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1340 | { |
aaff4b55 | 1341 | struct sk_buff *reply; |
d6569377 | 1342 | struct datapath *dp; |
d6569377 | 1343 | int err; |
1dcf111b | 1344 | |
cd2a59e9 | 1345 | ovs_lock(); |
2a4999f3 | 1346 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1347 | if (IS_ERR(dp)) { |
1348 | err = PTR_ERR(dp); | |
1349 | goto unlock; | |
1350 | } | |
1dcf111b | 1351 | |
68eadcf0 | 1352 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW); |
cd2a59e9 PS |
1353 | if (IS_ERR(reply)) { |
1354 | err = PTR_ERR(reply); | |
1355 | goto unlock; | |
1356 | } | |
aaff4b55 | 1357 | |
cd2a59e9 | 1358 | ovs_unlock(); |
aaff4b55 | 1359 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1360 | |
1361 | unlock: | |
1362 | ovs_unlock(); | |
1363 | return err; | |
1dcf111b JP |
1364 | } |
1365 | ||
df2c07f4 | 1366 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1367 | { |
2a4999f3 | 1368 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1369 | struct datapath *dp; |
1370 | int skip = cb->args[0]; | |
1371 | int i = 0; | |
a7786963 | 1372 | |
fb93e9aa PS |
1373 | rcu_read_lock(); |
1374 | list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1375 | if (i >= skip && |
28aea917 | 1376 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1377 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1378 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1379 | break; |
254f2dc8 | 1380 | i++; |
a7786963 | 1381 | } |
fb93e9aa | 1382 | rcu_read_unlock(); |
aaff4b55 | 1383 | |
254f2dc8 BP |
1384 | cb->args[0] = i; |
1385 | ||
aaff4b55 | 1386 | return skb->len; |
c19e6535 BP |
1387 | } |
1388 | ||
aaff4b55 | 1389 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1390 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1391 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1392 | .policy = datapath_policy, | |
df2c07f4 | 1393 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1394 | }, |
df2c07f4 | 1395 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1396 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1397 | .policy = datapath_policy, | |
df2c07f4 | 1398 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1399 | }, |
df2c07f4 | 1400 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1401 | .flags = 0, /* OK for unprivileged users. */ |
1402 | .policy = datapath_policy, | |
df2c07f4 JP |
1403 | .doit = ovs_dp_cmd_get, |
1404 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1405 | }, |
df2c07f4 | 1406 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1407 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1408 | .policy = datapath_policy, | |
df2c07f4 | 1409 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1410 | }, |
1411 | }; | |
1412 | ||
df2c07f4 | 1413 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
df2c07f4 | 1414 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1415 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
d48c88ec JG |
1416 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1417 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1418 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1419 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1420 | }; |
1421 | ||
f0fef760 BP |
1422 | static struct genl_family dp_vport_genl_family = { |
1423 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1424 | .hdrsize = sizeof(struct ovs_header), |
1425 | .name = OVS_VPORT_FAMILY, | |
69685a88 | 1426 | .version = OVS_VPORT_VERSION, |
2a4999f3 | 1427 | .maxattr = OVS_VPORT_ATTR_MAX, |
b3dcb73c | 1428 | .netnsok = true, |
14002a59 | 1429 | SET_PARALLEL_OPS |
f0fef760 BP |
1430 | }; |
1431 | ||
850b6b3b | 1432 | struct genl_multicast_group ovs_dp_vport_multicast_group = { |
df2c07f4 | 1433 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1434 | }; |
1435 | ||
cd2a59e9 | 1436 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1437 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1438 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1439 | { |
df2c07f4 | 1440 | struct ovs_header *ovs_header; |
e926dfe3 | 1441 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1442 | int err; |
1443 | ||
28aea917 | 1444 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1445 | flags, cmd); |
df2c07f4 | 1446 | if (!ovs_header) |
f0fef760 | 1447 | return -EMSGSIZE; |
c19e6535 | 1448 | |
99769a40 | 1449 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1450 | |
c3cc8c03 DM |
1451 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1452 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
1453 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || | |
28aea917 | 1454 | nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid)) |
c3cc8c03 | 1455 | goto nla_put_failure; |
c19e6535 | 1456 | |
850b6b3b | 1457 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1458 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1459 | &vport_stats)) | |
1460 | goto nla_put_failure; | |
c19e6535 | 1461 | |
850b6b3b | 1462 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1463 | if (err == -EMSGSIZE) |
1464 | goto error; | |
c19e6535 | 1465 | |
df2c07f4 | 1466 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1467 | |
1468 | nla_put_failure: | |
1469 | err = -EMSGSIZE; | |
f0fef760 | 1470 | error: |
df2c07f4 | 1471 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1472 | return err; |
064af421 BP |
1473 | } |
1474 | ||
cd2a59e9 | 1475 | /* Called with ovs_mutex or RCU read lock. */ |
28aea917 | 1476 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 1477 | u32 seq, u8 cmd) |
064af421 | 1478 | { |
c19e6535 | 1479 | struct sk_buff *skb; |
f0fef760 | 1480 | int retval; |
c19e6535 | 1481 | |
f0fef760 | 1482 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1483 | if (!skb) |
1484 | return ERR_PTR(-ENOMEM); | |
1485 | ||
28aea917 | 1486 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
1487 | BUG_ON(retval < 0); |
1488 | ||
c19e6535 | 1489 | return skb; |
f0fef760 | 1490 | } |
c19e6535 | 1491 | |
cd2a59e9 | 1492 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 PS |
1493 | static struct vport *lookup_vport(struct net *net, |
1494 | struct ovs_header *ovs_header, | |
df2c07f4 | 1495 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1496 | { |
1497 | struct datapath *dp; | |
1498 | struct vport *vport; | |
1499 | ||
df2c07f4 | 1500 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1501 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1502 | if (!vport) |
c19e6535 | 1503 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1504 | if (ovs_header->dp_ifindex && |
1505 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1506 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1507 | return vport; |
df2c07f4 JP |
1508 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1509 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1510 | |
1511 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1512 | return ERR_PTR(-EFBIG); |
c19e6535 | 1513 | |
2a4999f3 | 1514 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1515 | if (!dp) |
1516 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1517 | |
cd2a59e9 | 1518 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 1519 | if (!vport) |
17535c57 | 1520 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1521 | return vport; |
1522 | } else | |
1523 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1524 | } |
1525 | ||
df2c07f4 | 1526 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1527 | { |
f0fef760 | 1528 | struct nlattr **a = info->attrs; |
df2c07f4 | 1529 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1530 | struct vport_parms parms; |
ed099e92 | 1531 | struct sk_buff *reply; |
c19e6535 | 1532 | struct vport *vport; |
c19e6535 | 1533 | struct datapath *dp; |
b0ec0f27 | 1534 | u32 port_no; |
c19e6535 | 1535 | int err; |
b0ec0f27 | 1536 | |
c19e6535 | 1537 | err = -EINVAL; |
ea36840f BP |
1538 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1539 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
f0fef760 BP |
1540 | goto exit; |
1541 | ||
cd2a59e9 | 1542 | ovs_lock(); |
2a4999f3 | 1543 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1544 | err = -ENODEV; |
1545 | if (!dp) | |
ed099e92 | 1546 | goto exit_unlock; |
c19e6535 | 1547 | |
df2c07f4 JP |
1548 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1549 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1550 | |
1551 | err = -EFBIG; | |
1552 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 1553 | goto exit_unlock; |
c19e6535 | 1554 | |
cd2a59e9 | 1555 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1556 | err = -EBUSY; |
1557 | if (vport) | |
ed099e92 | 1558 | goto exit_unlock; |
c19e6535 BP |
1559 | } else { |
1560 | for (port_no = 1; ; port_no++) { | |
1561 | if (port_no >= DP_MAX_PORTS) { | |
1562 | err = -EFBIG; | |
ed099e92 | 1563 | goto exit_unlock; |
c19e6535 | 1564 | } |
cd2a59e9 | 1565 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1566 | if (!vport) |
1567 | break; | |
51d4d598 | 1568 | } |
064af421 | 1569 | } |
b0ec0f27 | 1570 | |
df2c07f4 JP |
1571 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1572 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1573 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1574 | parms.dp = dp; |
1575 | parms.port_no = port_no; | |
28aea917 | 1576 | parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 BP |
1577 | |
1578 | vport = new_vport(&parms); | |
1579 | err = PTR_ERR(vport); | |
1580 | if (IS_ERR(vport)) | |
ed099e92 | 1581 | goto exit_unlock; |
c19e6535 | 1582 | |
faef6d2d | 1583 | err = 0; |
1fc7083d JG |
1584 | if (a[OVS_VPORT_ATTR_STATS]) |
1585 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
1586 | ||
1587 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, | |
1588 | OVS_VPORT_CMD_NEW); | |
1589 | if (IS_ERR(reply)) { | |
1590 | err = PTR_ERR(reply); | |
850b6b3b | 1591 | ovs_dp_detach_port(vport); |
ed099e92 | 1592 | goto exit_unlock; |
c19e6535 | 1593 | } |
e297c6b7 TG |
1594 | |
1595 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); | |
c19e6535 | 1596 | |
ed099e92 | 1597 | exit_unlock: |
cd2a59e9 | 1598 | ovs_unlock(); |
c19e6535 BP |
1599 | exit: |
1600 | return err; | |
44e05eca BP |
1601 | } |
1602 | ||
df2c07f4 | 1603 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1604 | { |
f0fef760 BP |
1605 | struct nlattr **a = info->attrs; |
1606 | struct sk_buff *reply; | |
c19e6535 | 1607 | struct vport *vport; |
c19e6535 | 1608 | int err; |
44e05eca | 1609 | |
cd2a59e9 | 1610 | ovs_lock(); |
2a4999f3 | 1611 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
1612 | err = PTR_ERR(vport); |
1613 | if (IS_ERR(vport)) | |
f0fef760 | 1614 | goto exit_unlock; |
44e05eca | 1615 | |
6455100f | 1616 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 1617 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 1618 | err = -EINVAL; |
17ec1d04 JG |
1619 | goto exit_unlock; |
1620 | } | |
6455100f | 1621 | |
c25ea534 JG |
1622 | reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1623 | if (!reply) { | |
1624 | err = -ENOMEM; | |
1625 | goto exit_unlock; | |
1626 | } | |
1627 | ||
17ec1d04 | 1628 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 1629 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 JG |
1630 | if (err) |
1631 | goto exit_free; | |
1632 | } | |
1fc7083d JG |
1633 | |
1634 | if (a[OVS_VPORT_ATTR_STATS]) | |
1635 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
1636 | ||
1637 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) | |
28aea917 | 1638 | vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 | 1639 | |
c25ea534 JG |
1640 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1641 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1642 | BUG_ON(err < 0); | |
f0fef760 | 1643 | |
cd2a59e9 | 1644 | ovs_unlock(); |
8680ae4d | 1645 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
c25ea534 JG |
1646 | return 0; |
1647 | ||
1648 | exit_free: | |
1649 | kfree_skb(reply); | |
f0fef760 | 1650 | exit_unlock: |
cd2a59e9 | 1651 | ovs_unlock(); |
c19e6535 | 1652 | return err; |
064af421 BP |
1653 | } |
1654 | ||
df2c07f4 | 1655 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1656 | { |
f0fef760 BP |
1657 | struct nlattr **a = info->attrs; |
1658 | struct sk_buff *reply; | |
c19e6535 | 1659 | struct vport *vport; |
c19e6535 BP |
1660 | int err; |
1661 | ||
cd2a59e9 | 1662 | ovs_lock(); |
2a4999f3 | 1663 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 1664 | err = PTR_ERR(vport); |
f0fef760 BP |
1665 | if (IS_ERR(vport)) |
1666 | goto exit_unlock; | |
c19e6535 | 1667 | |
df2c07f4 | 1668 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
1669 | err = -EINVAL; |
1670 | goto exit_unlock; | |
1671 | } | |
1672 | ||
28aea917 IY |
1673 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
1674 | info->snd_seq, OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
1675 | err = PTR_ERR(reply); |
1676 | if (IS_ERR(reply)) | |
1677 | goto exit_unlock; | |
1678 | ||
b57d5819 | 1679 | err = 0; |
850b6b3b | 1680 | ovs_dp_detach_port(vport); |
f0fef760 | 1681 | |
e297c6b7 | 1682 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
f0fef760 BP |
1683 | |
1684 | exit_unlock: | |
cd2a59e9 | 1685 | ovs_unlock(); |
c19e6535 | 1686 | return err; |
7c40efc9 BP |
1687 | } |
1688 | ||
df2c07f4 | 1689 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1690 | { |
f0fef760 | 1691 | struct nlattr **a = info->attrs; |
df2c07f4 | 1692 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 1693 | struct sk_buff *reply; |
c19e6535 | 1694 | struct vport *vport; |
c19e6535 BP |
1695 | int err; |
1696 | ||
ed099e92 | 1697 | rcu_read_lock(); |
2a4999f3 | 1698 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
1699 | err = PTR_ERR(vport); |
1700 | if (IS_ERR(vport)) | |
f0fef760 | 1701 | goto exit_unlock; |
c19e6535 | 1702 | |
28aea917 IY |
1703 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
1704 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
1705 | err = PTR_ERR(reply); |
1706 | if (IS_ERR(reply)) | |
f0fef760 | 1707 | goto exit_unlock; |
ed099e92 | 1708 | |
df2fa9b5 JG |
1709 | rcu_read_unlock(); |
1710 | ||
1711 | return genlmsg_reply(reply, info); | |
ed099e92 | 1712 | |
f0fef760 | 1713 | exit_unlock: |
ed099e92 | 1714 | rcu_read_unlock(); |
c19e6535 BP |
1715 | return err; |
1716 | } | |
1717 | ||
df2c07f4 | 1718 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 1719 | { |
df2c07f4 | 1720 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 1721 | struct datapath *dp; |
95b1d73a PS |
1722 | int bucket = cb->args[0], skip = cb->args[1]; |
1723 | int i, j = 0; | |
c19e6535 | 1724 | |
2a4999f3 | 1725 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 | 1726 | if (!dp) |
f0fef760 | 1727 | return -ENODEV; |
ed099e92 BP |
1728 | |
1729 | rcu_read_lock(); | |
95b1d73a | 1730 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 1731 | struct vport *vport; |
95b1d73a PS |
1732 | |
1733 | j = 0; | |
f8dfbcb7 | 1734 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
1735 | if (j >= skip && |
1736 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 1737 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
1738 | cb->nlh->nlmsg_seq, |
1739 | NLM_F_MULTI, | |
1740 | OVS_VPORT_CMD_NEW) < 0) | |
1741 | goto out; | |
1742 | ||
1743 | j++; | |
1744 | } | |
1745 | skip = 0; | |
c19e6535 | 1746 | } |
95b1d73a | 1747 | out: |
ed099e92 | 1748 | rcu_read_unlock(); |
c19e6535 | 1749 | |
95b1d73a PS |
1750 | cb->args[0] = i; |
1751 | cb->args[1] = j; | |
f0fef760 | 1752 | |
95b1d73a | 1753 | return skb->len; |
7c40efc9 BP |
1754 | } |
1755 | ||
f0fef760 | 1756 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 1757 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
1758 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1759 | .policy = vport_policy, | |
df2c07f4 | 1760 | .doit = ovs_vport_cmd_new |
f0fef760 | 1761 | }, |
df2c07f4 | 1762 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
1763 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1764 | .policy = vport_policy, | |
df2c07f4 | 1765 | .doit = ovs_vport_cmd_del |
f0fef760 | 1766 | }, |
df2c07f4 | 1767 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
1768 | .flags = 0, /* OK for unprivileged users. */ |
1769 | .policy = vport_policy, | |
df2c07f4 JP |
1770 | .doit = ovs_vport_cmd_get, |
1771 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 1772 | }, |
df2c07f4 | 1773 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
1774 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1775 | .policy = vport_policy, | |
df2c07f4 | 1776 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
1777 | }, |
1778 | }; | |
1779 | ||
982b8810 BP |
1780 | struct genl_family_and_ops { |
1781 | struct genl_family *family; | |
1782 | struct genl_ops *ops; | |
1783 | int n_ops; | |
1784 | struct genl_multicast_group *group; | |
1785 | }; | |
ed099e92 | 1786 | |
982b8810 | 1787 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
1788 | { &dp_datapath_genl_family, |
1789 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
850b6b3b | 1790 | &ovs_dp_datapath_multicast_group }, |
f0fef760 BP |
1791 | { &dp_vport_genl_family, |
1792 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
850b6b3b | 1793 | &ovs_dp_vport_multicast_group }, |
37a1300c BP |
1794 | { &dp_flow_genl_family, |
1795 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
850b6b3b | 1796 | &ovs_dp_flow_multicast_group }, |
982b8810 BP |
1797 | { &dp_packet_genl_family, |
1798 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
1799 | NULL }, | |
1800 | }; | |
ed099e92 | 1801 | |
982b8810 BP |
1802 | static void dp_unregister_genl(int n_families) |
1803 | { | |
1804 | int i; | |
ed099e92 | 1805 | |
b867ca75 | 1806 | for (i = 0; i < n_families; i++) |
982b8810 | 1807 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
1808 | } |
1809 | ||
982b8810 | 1810 | static int dp_register_genl(void) |
064af421 | 1811 | { |
982b8810 BP |
1812 | int n_registered; |
1813 | int err; | |
1814 | int i; | |
064af421 | 1815 | |
982b8810 BP |
1816 | n_registered = 0; |
1817 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
1818 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 1819 | |
982b8810 BP |
1820 | err = genl_register_family_with_ops(f->family, f->ops, |
1821 | f->n_ops); | |
1822 | if (err) | |
1823 | goto error; | |
1824 | n_registered++; | |
e22d4953 | 1825 | |
982b8810 BP |
1826 | if (f->group) { |
1827 | err = genl_register_mc_group(f->family, f->group); | |
1828 | if (err) | |
1829 | goto error; | |
1830 | } | |
1831 | } | |
9cc8b4e4 | 1832 | |
982b8810 | 1833 | return 0; |
064af421 BP |
1834 | |
1835 | error: | |
982b8810 BP |
1836 | dp_unregister_genl(n_registered); |
1837 | return err; | |
064af421 BP |
1838 | } |
1839 | ||
2a4999f3 PS |
1840 | static int __net_init ovs_init_net(struct net *net) |
1841 | { | |
1842 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
1843 | ||
1844 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 1845 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
2a4999f3 PS |
1846 | return 0; |
1847 | } | |
1848 | ||
1849 | static void __net_exit ovs_exit_net(struct net *net) | |
1850 | { | |
cd2a59e9 | 1851 | struct datapath *dp, *dp_next; |
2a4999f3 PS |
1852 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
1853 | ||
cd2a59e9 PS |
1854 | ovs_lock(); |
1855 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
1856 | __dp_destroy(dp); | |
1857 | ovs_unlock(); | |
1858 | ||
1859 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
1860 | } |
1861 | ||
1862 | static struct pernet_operations ovs_net_ops = { | |
1863 | .init = ovs_init_net, | |
1864 | .exit = ovs_exit_net, | |
1865 | .id = &ovs_net_id, | |
1866 | .size = sizeof(struct ovs_net), | |
1867 | }; | |
1868 | ||
637c8268 PS |
1869 | DEFINE_COMPAT_PNET_REG_FUNC(device); |
1870 | ||
22d24ebf BP |
1871 | static int __init dp_init(void) |
1872 | { | |
1873 | int err; | |
1874 | ||
f3d85db3 | 1875 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 1876 | |
dc5f3fef | 1877 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 1878 | VERSION); |
064af421 | 1879 | |
850b6b3b | 1880 | err = ovs_flow_init(); |
3544358a | 1881 | if (err) |
533e96e7 | 1882 | goto error; |
3544358a | 1883 | |
850b6b3b | 1884 | err = ovs_vport_init(); |
064af421 BP |
1885 | if (err) |
1886 | goto error_flow_exit; | |
1887 | ||
2a4999f3 | 1888 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
1889 | if (err) |
1890 | goto error_vport_exit; | |
1891 | ||
2a4999f3 PS |
1892 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
1893 | if (err) | |
1894 | goto error_netns_exit; | |
1895 | ||
982b8810 BP |
1896 | err = dp_register_genl(); |
1897 | if (err < 0) | |
37a1300c | 1898 | goto error_unreg_notifier; |
982b8810 | 1899 | |
064af421 BP |
1900 | return 0; |
1901 | ||
1902 | error_unreg_notifier: | |
850b6b3b | 1903 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
1904 | error_netns_exit: |
1905 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 1906 | error_vport_exit: |
850b6b3b | 1907 | ovs_vport_exit(); |
064af421 | 1908 | error_flow_exit: |
850b6b3b | 1909 | ovs_flow_exit(); |
064af421 BP |
1910 | error: |
1911 | return err; | |
1912 | } | |
1913 | ||
1914 | static void dp_cleanup(void) | |
1915 | { | |
982b8810 | 1916 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
850b6b3b | 1917 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
1918 | unregister_pernet_device(&ovs_net_ops); |
1919 | rcu_barrier(); | |
850b6b3b JG |
1920 | ovs_vport_exit(); |
1921 | ovs_flow_exit(); | |
064af421 BP |
1922 | } |
1923 | ||
1924 | module_init(dp_init); | |
1925 | module_exit(dp_cleanup); | |
1926 | ||
1927 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
1928 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 1929 | MODULE_VERSION(VERSION); |