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Commit | Line | Data |
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064af421 | 1 | /* |
e0edde6f | 2 | * Copyright (c) 2007-2012 Nicira, Inc. |
a14bc59f | 3 | * |
a9a29d22 JG |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
064af421 BP |
17 | */ |
18 | ||
dfffaef1 JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
064af421 BP |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> | |
064af421 | 23 | #include <linux/if_arp.h> |
064af421 BP |
24 | #include <linux/if_vlan.h> |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
982b8810 | 27 | #include <linux/jhash.h> |
064af421 BP |
28 | #include <linux/delay.h> |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
ed099e92 | 31 | #include <linux/genetlink.h> |
064af421 BP |
32 | #include <linux/kernel.h> |
33 | #include <linux/kthread.h> | |
064af421 BP |
34 | #include <linux/mutex.h> |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
39 | #include <linux/version.h> | |
40 | #include <linux/ethtool.h> | |
064af421 | 41 | #include <linux/wait.h> |
064af421 | 42 | #include <asm/div64.h> |
656a0e37 | 43 | #include <linux/highmem.h> |
064af421 BP |
44 | #include <linux/netfilter_bridge.h> |
45 | #include <linux/netfilter_ipv4.h> | |
46 | #include <linux/inetdevice.h> | |
47 | #include <linux/list.h> | |
077257b8 | 48 | #include <linux/openvswitch.h> |
064af421 | 49 | #include <linux/rculist.h> |
064af421 | 50 | #include <linux/dmi.h> |
36956a7d | 51 | #include <net/genetlink.h> |
2a4999f3 PS |
52 | #include <net/net_namespace.h> |
53 | #include <net/netns/generic.h> | |
064af421 | 54 | |
dd8d6b8c | 55 | #include "checksum.h" |
064af421 | 56 | #include "datapath.h" |
064af421 | 57 | #include "flow.h" |
b9c15df9 | 58 | #include "genl_exec.h" |
303708cc | 59 | #include "vlan.h" |
3544358a | 60 | #include "tunnel.h" |
f2459fe7 | 61 | #include "vport-internal_dev.h" |
064af421 | 62 | |
4cf41591 | 63 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) || \ |
64807dfb JP |
64 | LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0) |
65 | #error Kernels before 2.6.18 or after 3.8 are not supported by this version of Open vSwitch. | |
4cf41591 JG |
66 | #endif |
67 | ||
acd051f1 PS |
68 | #define REHASH_FLOW_INTERVAL (10 * 60 * HZ) |
69 | static void rehash_flow_table(struct work_struct *work); | |
70 | static DECLARE_DELAYED_WORK(rehash_flow_wq, rehash_flow_table); | |
71 | ||
2a4999f3 PS |
72 | int ovs_net_id __read_mostly; |
73 | ||
ed099e92 BP |
74 | /** |
75 | * DOC: Locking: | |
064af421 | 76 | * |
ed099e92 BP |
77 | * Writes to device state (add/remove datapath, port, set operations on vports, |
78 | * etc.) are protected by RTNL. | |
064af421 | 79 | * |
ed099e92 | 80 | * Writes to other state (flow table modifications, set miscellaneous datapath |
7257b535 BP |
81 | * parameters, etc.) are protected by genl_mutex. The RTNL lock nests inside |
82 | * genl_mutex. | |
ed099e92 BP |
83 | * |
84 | * Reads are protected by RCU. | |
85 | * | |
86 | * There are a few special cases (mostly stats) that have their own | |
87 | * synchronization but they nest under all of above and don't interact with | |
88 | * each other. | |
064af421 | 89 | */ |
ed099e92 | 90 | |
c19e6535 | 91 | static struct vport *new_vport(const struct vport_parms *); |
2a4999f3 | 92 | static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *, |
7257b535 | 93 | const struct dp_upcall_info *); |
2a4999f3 PS |
94 | static int queue_userspace_packet(struct net *, int dp_ifindex, |
95 | struct sk_buff *, | |
7257b535 | 96 | const struct dp_upcall_info *); |
064af421 | 97 | |
ed099e92 | 98 | /* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */ |
2a4999f3 | 99 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
064af421 | 100 | { |
254f2dc8 BP |
101 | struct datapath *dp = NULL; |
102 | struct net_device *dev; | |
ed099e92 | 103 | |
254f2dc8 | 104 | rcu_read_lock(); |
2a4999f3 | 105 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
254f2dc8 | 106 | if (dev) { |
850b6b3b | 107 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 BP |
108 | if (vport) |
109 | dp = vport->dp; | |
110 | } | |
111 | rcu_read_unlock(); | |
112 | ||
113 | return dp; | |
064af421 | 114 | } |
064af421 | 115 | |
f2459fe7 | 116 | /* Must be called with rcu_read_lock or RTNL lock. */ |
850b6b3b | 117 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 118 | { |
95b1d73a | 119 | struct vport *vport = ovs_vport_rtnl_rcu(dp, OVSP_LOCAL); |
16b82e84 | 120 | return vport->ops->get_name(vport); |
f2459fe7 JG |
121 | } |
122 | ||
99769a40 JG |
123 | static int get_dpifindex(struct datapath *dp) |
124 | { | |
125 | struct vport *local; | |
126 | int ifindex; | |
127 | ||
128 | rcu_read_lock(); | |
129 | ||
95b1d73a | 130 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 131 | if (local) |
16b82e84 | 132 | ifindex = local->ops->get_ifindex(local); |
99769a40 JG |
133 | else |
134 | ifindex = 0; | |
135 | ||
136 | rcu_read_unlock(); | |
137 | ||
138 | return ifindex; | |
139 | } | |
140 | ||
46c6a11d JG |
141 | static void destroy_dp_rcu(struct rcu_head *rcu) |
142 | { | |
143 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 144 | |
850b6b3b | 145 | ovs_flow_tbl_destroy((__force struct flow_table *)dp->table); |
46c6a11d | 146 | free_percpu(dp->stats_percpu); |
2a4999f3 | 147 | release_net(ovs_dp_get_net(dp)); |
95b1d73a | 148 | kfree(dp->ports); |
5ca1ba48 | 149 | kfree(dp); |
46c6a11d JG |
150 | } |
151 | ||
95b1d73a PS |
152 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
153 | u16 port_no) | |
154 | { | |
155 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
156 | } | |
157 | ||
158 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) | |
159 | { | |
160 | struct vport *vport; | |
95b1d73a PS |
161 | struct hlist_head *head; |
162 | ||
163 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 164 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
165 | if (vport->port_no == port_no) |
166 | return vport; | |
167 | } | |
168 | return NULL; | |
169 | } | |
170 | ||
ed099e92 | 171 | /* Called with RTNL lock and genl_lock. */ |
c19e6535 | 172 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 173 | { |
f2459fe7 | 174 | struct vport *vport; |
f2459fe7 | 175 | |
850b6b3b | 176 | vport = ovs_vport_add(parms); |
c19e6535 BP |
177 | if (!IS_ERR(vport)) { |
178 | struct datapath *dp = parms->dp; | |
95b1d73a | 179 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 180 | |
95b1d73a | 181 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 182 | } |
c19e6535 | 183 | return vport; |
064af421 BP |
184 | } |
185 | ||
ed099e92 | 186 | /* Called with RTNL lock. */ |
850b6b3b | 187 | void ovs_dp_detach_port(struct vport *p) |
064af421 BP |
188 | { |
189 | ASSERT_RTNL(); | |
190 | ||
064af421 | 191 | /* First drop references to device. */ |
95b1d73a | 192 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 193 | |
7237e4f4 | 194 | /* Then destroy it. */ |
850b6b3b | 195 | ovs_vport_del(p); |
064af421 BP |
196 | } |
197 | ||
8819fac7 | 198 | /* Must be called with rcu_read_lock. */ |
850b6b3b | 199 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
200 | { |
201 | struct datapath *dp = p->dp; | |
3544358a | 202 | struct sw_flow *flow; |
064af421 | 203 | struct dp_stats_percpu *stats; |
52a23d92 | 204 | struct sw_flow_key key; |
e9141eec | 205 | u64 *stats_counter; |
4c1ad233 | 206 | int error; |
52a23d92 | 207 | int key_len; |
064af421 | 208 | |
70dbc259 | 209 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 210 | |
52a23d92 JG |
211 | /* Extract flow from 'skb' into 'key'. */ |
212 | error = ovs_flow_extract(skb, p->port_no, &key, &key_len); | |
213 | if (unlikely(error)) { | |
214 | kfree_skb(skb); | |
215 | return; | |
55574bb0 BP |
216 | } |
217 | ||
52a23d92 JG |
218 | /* Look up flow. */ |
219 | flow = ovs_flow_tbl_lookup(rcu_dereference(dp->table), &key, key_len); | |
220 | if (unlikely(!flow)) { | |
221 | struct dp_upcall_info upcall; | |
222 | ||
223 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
224 | upcall.key = &key; | |
225 | upcall.userdata = NULL; | |
226 | upcall.portid = p->upcall_portid; | |
227 | ovs_dp_upcall(dp, skb, &upcall); | |
228 | consume_skb(skb); | |
229 | stats_counter = &stats->n_missed; | |
230 | goto out; | |
231 | } | |
232 | ||
233 | OVS_CB(skb)->flow = flow; | |
234 | ||
e9141eec | 235 | stats_counter = &stats->n_hit; |
850b6b3b JG |
236 | ovs_flow_used(OVS_CB(skb)->flow, skb); |
237 | ovs_execute_actions(dp, skb); | |
55574bb0 | 238 | |
8819fac7 | 239 | out: |
55574bb0 | 240 | /* Update datapath statistics. */ |
821cb9fa | 241 | u64_stats_update_begin(&stats->sync); |
e9141eec | 242 | (*stats_counter)++; |
821cb9fa | 243 | u64_stats_update_end(&stats->sync); |
064af421 BP |
244 | } |
245 | ||
aa5a8fdc JG |
246 | static struct genl_family dp_packet_genl_family = { |
247 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
248 | .hdrsize = sizeof(struct ovs_header), |
249 | .name = OVS_PACKET_FAMILY, | |
69685a88 | 250 | .version = OVS_PACKET_VERSION, |
2a4999f3 PS |
251 | .maxattr = OVS_PACKET_ATTR_MAX, |
252 | SET_NETNSOK | |
aa5a8fdc JG |
253 | }; |
254 | ||
850b6b3b JG |
255 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
256 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc JG |
257 | { |
258 | struct dp_stats_percpu *stats; | |
7257b535 | 259 | int dp_ifindex; |
aa5a8fdc JG |
260 | int err; |
261 | ||
28aea917 | 262 | if (upcall_info->portid == 0) { |
b063d9f0 | 263 | err = -ENOTCONN; |
b063d9f0 JG |
264 | goto err; |
265 | } | |
266 | ||
7257b535 BP |
267 | dp_ifindex = get_dpifindex(dp); |
268 | if (!dp_ifindex) { | |
269 | err = -ENODEV; | |
270 | goto err; | |
aa5a8fdc JG |
271 | } |
272 | ||
7257b535 | 273 | forward_ip_summed(skb, true); |
36ce148c | 274 | |
7257b535 | 275 | if (!skb_is_gso(skb)) |
2a4999f3 | 276 | err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
7257b535 | 277 | else |
2a4999f3 | 278 | err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
d76195db JG |
279 | if (err) |
280 | goto err; | |
281 | ||
282 | return 0; | |
aa5a8fdc | 283 | |
aa5a8fdc | 284 | err: |
70dbc259 | 285 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 286 | |
821cb9fa | 287 | u64_stats_update_begin(&stats->sync); |
aa5a8fdc | 288 | stats->n_lost++; |
821cb9fa | 289 | u64_stats_update_end(&stats->sync); |
aa5a8fdc | 290 | |
aa5a8fdc | 291 | return err; |
982b8810 BP |
292 | } |
293 | ||
2a4999f3 PS |
294 | static int queue_gso_packets(struct net *net, int dp_ifindex, |
295 | struct sk_buff *skb, | |
7257b535 | 296 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 297 | { |
d4cba1f8 | 298 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
299 | struct dp_upcall_info later_info; |
300 | struct sw_flow_key later_key; | |
301 | struct sk_buff *segs, *nskb; | |
302 | int err; | |
cb5087ca | 303 | |
0aa52d88 | 304 | segs = __skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM, false); |
79089764 PS |
305 | if (IS_ERR(segs)) |
306 | return PTR_ERR(segs); | |
99769a40 | 307 | |
7257b535 BP |
308 | /* Queue all of the segments. */ |
309 | skb = segs; | |
cb5087ca | 310 | do { |
2a4999f3 | 311 | err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info); |
982b8810 | 312 | if (err) |
7257b535 | 313 | break; |
856081f6 | 314 | |
d4cba1f8 | 315 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
e1cf87ff JG |
316 | /* The initial flow key extracted by ovs_flow_extract() |
317 | * in this case is for a first fragment, so we need to | |
7257b535 BP |
318 | * properly mark later fragments. |
319 | */ | |
320 | later_key = *upcall_info->key; | |
9e44d715 | 321 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
7257b535 BP |
322 | |
323 | later_info = *upcall_info; | |
324 | later_info.key = &later_key; | |
325 | upcall_info = &later_info; | |
326 | } | |
36ce148c | 327 | } while ((skb = skb->next)); |
cb5087ca | 328 | |
7257b535 BP |
329 | /* Free all of the segments. */ |
330 | skb = segs; | |
331 | do { | |
332 | nskb = skb->next; | |
333 | if (err) | |
334 | kfree_skb(skb); | |
335 | else | |
336 | consume_skb(skb); | |
337 | } while ((skb = nskb)); | |
338 | return err; | |
339 | } | |
340 | ||
2a4999f3 PS |
341 | static int queue_userspace_packet(struct net *net, int dp_ifindex, |
342 | struct sk_buff *skb, | |
7257b535 BP |
343 | const struct dp_upcall_info *upcall_info) |
344 | { | |
345 | struct ovs_header *upcall; | |
6161d3fd | 346 | struct sk_buff *nskb = NULL; |
7257b535 BP |
347 | struct sk_buff *user_skb; /* to be queued to userspace */ |
348 | struct nlattr *nla; | |
349 | unsigned int len; | |
350 | int err; | |
351 | ||
6161d3fd JG |
352 | if (vlan_tx_tag_present(skb)) { |
353 | nskb = skb_clone(skb, GFP_ATOMIC); | |
354 | if (!nskb) | |
355 | return -ENOMEM; | |
356 | ||
357 | err = vlan_deaccel_tag(nskb); | |
358 | if (err) | |
359 | return err; | |
7257b535 | 360 | |
6161d3fd JG |
361 | skb = nskb; |
362 | } | |
363 | ||
364 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
365 | err = -EFBIG; | |
366 | goto out; | |
367 | } | |
7257b535 BP |
368 | |
369 | len = sizeof(struct ovs_header); | |
370 | len += nla_total_size(skb->len); | |
371 | len += nla_total_size(FLOW_BUFSIZE); | |
e995e3df BP |
372 | if (upcall_info->userdata) |
373 | len += NLA_ALIGN(upcall_info->userdata->nla_len); | |
7257b535 BP |
374 | |
375 | user_skb = genlmsg_new(len, GFP_ATOMIC); | |
6161d3fd JG |
376 | if (!user_skb) { |
377 | err = -ENOMEM; | |
378 | goto out; | |
379 | } | |
7257b535 BP |
380 | |
381 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
382 | 0, upcall_info->cmd); | |
383 | upcall->dp_ifindex = dp_ifindex; | |
384 | ||
385 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
850b6b3b | 386 | ovs_flow_to_nlattrs(upcall_info->key, user_skb); |
7257b535 BP |
387 | nla_nest_end(user_skb, nla); |
388 | ||
389 | if (upcall_info->userdata) | |
e995e3df | 390 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 391 | nla_len(upcall_info->userdata), |
e995e3df | 392 | nla_data(upcall_info->userdata)); |
7257b535 BP |
393 | |
394 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); | |
bed53bd1 PS |
395 | |
396 | skb_copy_and_csum_dev(skb, nla_data(nla)); | |
7257b535 | 397 | |
c39b1a5c | 398 | genlmsg_end(user_skb, upcall); |
28aea917 | 399 | err = genlmsg_unicast(net, user_skb, upcall_info->portid); |
6161d3fd JG |
400 | |
401 | out: | |
402 | kfree_skb(nskb); | |
403 | return err; | |
cb5087ca BP |
404 | } |
405 | ||
ed099e92 | 406 | /* Called with genl_mutex. */ |
2a4999f3 | 407 | static int flush_flows(struct datapath *dp) |
064af421 | 408 | { |
3544358a PS |
409 | struct flow_table *old_table; |
410 | struct flow_table *new_table; | |
8d5ebd83 | 411 | |
20d035b2 | 412 | old_table = genl_dereference(dp->table); |
850b6b3b | 413 | new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS); |
8d5ebd83 | 414 | if (!new_table) |
ed099e92 | 415 | return -ENOMEM; |
8d5ebd83 JG |
416 | |
417 | rcu_assign_pointer(dp->table, new_table); | |
418 | ||
850b6b3b | 419 | ovs_flow_tbl_deferred_destroy(old_table); |
ed099e92 | 420 | return 0; |
064af421 BP |
421 | } |
422 | ||
9b405f1a PS |
423 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, int attr_len) |
424 | { | |
425 | ||
426 | struct sw_flow_actions *acts; | |
427 | int new_acts_size; | |
428 | int req_size = NLA_ALIGN(attr_len); | |
429 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
430 | (*sfa)->actions_len; | |
431 | ||
ba400435 | 432 | if (req_size <= (ksize(*sfa) - next_offset)) |
9b405f1a PS |
433 | goto out; |
434 | ||
ba400435 | 435 | new_acts_size = ksize(*sfa) * 2; |
9b405f1a PS |
436 | |
437 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
438 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
439 | return ERR_PTR(-EMSGSIZE); | |
440 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
441 | } | |
442 | ||
443 | acts = ovs_flow_actions_alloc(new_acts_size); | |
444 | if (IS_ERR(acts)) | |
445 | return (void *)acts; | |
446 | ||
447 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
448 | acts->actions_len = (*sfa)->actions_len; | |
ba400435 | 449 | kfree(*sfa); |
9b405f1a PS |
450 | *sfa = acts; |
451 | ||
452 | out: | |
453 | (*sfa)->actions_len += req_size; | |
454 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
455 | } | |
456 | ||
457 | static int add_action(struct sw_flow_actions **sfa, int attrtype, void *data, int len) | |
458 | { | |
459 | struct nlattr *a; | |
460 | ||
461 | a = reserve_sfa_size(sfa, nla_attr_size(len)); | |
462 | if (IS_ERR(a)) | |
463 | return PTR_ERR(a); | |
464 | ||
465 | a->nla_type = attrtype; | |
466 | a->nla_len = nla_attr_size(len); | |
467 | ||
468 | if (data) | |
469 | memcpy(nla_data(a), data, len); | |
470 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
6ff686f2 | 471 | |
9b405f1a PS |
472 | return 0; |
473 | } | |
474 | ||
475 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, int attrtype) | |
476 | { | |
477 | int used = (*sfa)->actions_len; | |
478 | int err; | |
479 | ||
480 | err = add_action(sfa, attrtype, NULL, 0); | |
481 | if (err) | |
482 | return err; | |
483 | ||
484 | return used; | |
485 | } | |
486 | ||
487 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, int st_offset) | |
488 | { | |
489 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + st_offset); | |
490 | ||
491 | a->nla_len = sfa->actions_len - st_offset; | |
492 | } | |
493 | ||
494 | static int validate_and_copy_actions(const struct nlattr *attr, | |
495 | const struct sw_flow_key *key, int depth, | |
496 | struct sw_flow_actions **sfa); | |
497 | ||
498 | static int validate_and_copy_sample(const struct nlattr *attr, | |
499 | const struct sw_flow_key *key, int depth, | |
500 | struct sw_flow_actions **sfa) | |
6ff686f2 | 501 | { |
4be00e48 BP |
502 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; |
503 | const struct nlattr *probability, *actions; | |
504 | const struct nlattr *a; | |
9b405f1a | 505 | int rem, start, err, st_acts; |
4be00e48 BP |
506 | |
507 | memset(attrs, 0, sizeof(attrs)); | |
6455100f | 508 | nla_for_each_nested(a, attr, rem) { |
4be00e48 BP |
509 | int type = nla_type(a); |
510 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
511 | return -EINVAL; | |
512 | attrs[type] = a; | |
513 | } | |
514 | if (rem) | |
6ff686f2 | 515 | return -EINVAL; |
4be00e48 BP |
516 | |
517 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
518 | if (!probability || nla_len(probability) != sizeof(u32)) | |
6ff686f2 PS |
519 | return -EINVAL; |
520 | ||
4be00e48 BP |
521 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; |
522 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
523 | return -EINVAL; | |
9b405f1a PS |
524 | |
525 | /* validation done, copy sample action. */ | |
526 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE); | |
527 | if (start < 0) | |
528 | return start; | |
529 | err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, nla_data(probability), sizeof(u32)); | |
530 | if (err) | |
531 | return err; | |
532 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS); | |
533 | if (st_acts < 0) | |
534 | return st_acts; | |
535 | ||
536 | err = validate_and_copy_actions(actions, key, depth + 1, sfa); | |
537 | if (err) | |
538 | return err; | |
539 | ||
540 | add_nested_action_end(*sfa, st_acts); | |
541 | add_nested_action_end(*sfa, start); | |
542 | ||
543 | return 0; | |
4edb9ae9 PS |
544 | } |
545 | ||
b1323f59 PS |
546 | static int validate_tp_port(const struct sw_flow_key *flow_key) |
547 | { | |
548 | if (flow_key->eth.type == htons(ETH_P_IP)) { | |
6e9bea4d | 549 | if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst) |
b1323f59 PS |
550 | return 0; |
551 | } else if (flow_key->eth.type == htons(ETH_P_IPV6)) { | |
6e9bea4d | 552 | if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst) |
b1323f59 PS |
553 | return 0; |
554 | } | |
555 | ||
556 | return -EINVAL; | |
557 | } | |
558 | ||
9b405f1a PS |
559 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
560 | struct sw_flow_actions **sfa) | |
561 | { | |
562 | struct ovs_key_ipv4_tunnel tun_key; | |
563 | int err, start; | |
564 | ||
565 | err = ipv4_tun_from_nlattr(nla_data(attr), &tun_key); | |
566 | if (err) | |
567 | return err; | |
568 | ||
569 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET); | |
570 | if (start < 0) | |
571 | return start; | |
572 | ||
573 | err = add_action(sfa, OVS_KEY_ATTR_IPV4_TUNNEL, &tun_key, sizeof(tun_key)); | |
574 | add_nested_action_end(*sfa, start); | |
575 | ||
576 | return err; | |
577 | } | |
578 | ||
fea393b1 | 579 | static int validate_set(const struct nlattr *a, |
9b405f1a PS |
580 | const struct sw_flow_key *flow_key, |
581 | struct sw_flow_actions **sfa, | |
582 | bool *set_tun) | |
4edb9ae9 | 583 | { |
4edb9ae9 PS |
584 | const struct nlattr *ovs_key = nla_data(a); |
585 | int key_type = nla_type(ovs_key); | |
586 | ||
587 | /* There can be only one key in a action */ | |
588 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
589 | return -EINVAL; | |
590 | ||
591 | if (key_type > OVS_KEY_ATTR_MAX || | |
9b405f1a PS |
592 | (ovs_key_lens[key_type] != nla_len(ovs_key) && |
593 | ovs_key_lens[key_type] != -1)) | |
4edb9ae9 PS |
594 | return -EINVAL; |
595 | ||
fea393b1 | 596 | switch (key_type) { |
4edb9ae9 | 597 | const struct ovs_key_ipv4 *ipv4_key; |
bc7a5acd | 598 | const struct ovs_key_ipv6 *ipv6_key; |
9b405f1a | 599 | int err; |
4edb9ae9 | 600 | |
fea393b1 | 601 | case OVS_KEY_ATTR_PRIORITY: |
fea393b1 | 602 | case OVS_KEY_ATTR_ETHERNET: |
4edb9ae9 PS |
603 | break; |
604 | ||
72e8bf28 AA |
605 | case OVS_KEY_ATTR_SKB_MARK: |
606 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER) | |
607 | if (nla_get_u32(ovs_key) != 0) | |
608 | return -EINVAL; | |
609 | #endif | |
610 | break; | |
611 | ||
9b405f1a PS |
612 | case OVS_KEY_ATTR_TUNNEL: |
613 | *set_tun = true; | |
614 | err = validate_and_copy_set_tun(a, sfa); | |
615 | if (err) | |
616 | return err; | |
356af50b KM |
617 | break; |
618 | ||
fea393b1 | 619 | case OVS_KEY_ATTR_IPV4: |
4edb9ae9 PS |
620 | if (flow_key->eth.type != htons(ETH_P_IP)) |
621 | return -EINVAL; | |
622 | ||
6e9bea4d | 623 | if (!flow_key->ip.proto) |
4edb9ae9 PS |
624 | return -EINVAL; |
625 | ||
626 | ipv4_key = nla_data(ovs_key); | |
627 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
628 | return -EINVAL; | |
629 | ||
9e44d715 | 630 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) |
7257b535 BP |
631 | return -EINVAL; |
632 | ||
4edb9ae9 PS |
633 | break; |
634 | ||
bc7a5acd AA |
635 | case OVS_KEY_ATTR_IPV6: |
636 | if (flow_key->eth.type != htons(ETH_P_IPV6)) | |
637 | return -EINVAL; | |
638 | ||
639 | if (!flow_key->ip.proto) | |
640 | return -EINVAL; | |
641 | ||
642 | ipv6_key = nla_data(ovs_key); | |
643 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
644 | return -EINVAL; | |
645 | ||
646 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) | |
647 | return -EINVAL; | |
648 | ||
649 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) | |
650 | return -EINVAL; | |
651 | ||
652 | break; | |
653 | ||
fea393b1 | 654 | case OVS_KEY_ATTR_TCP: |
4edb9ae9 PS |
655 | if (flow_key->ip.proto != IPPROTO_TCP) |
656 | return -EINVAL; | |
657 | ||
b1323f59 | 658 | return validate_tp_port(flow_key); |
4edb9ae9 | 659 | |
fea393b1 | 660 | case OVS_KEY_ATTR_UDP: |
4edb9ae9 PS |
661 | if (flow_key->ip.proto != IPPROTO_UDP) |
662 | return -EINVAL; | |
663 | ||
b1323f59 | 664 | return validate_tp_port(flow_key); |
4edb9ae9 PS |
665 | |
666 | default: | |
667 | return -EINVAL; | |
668 | } | |
fea393b1 | 669 | |
4edb9ae9 | 670 | return 0; |
6ff686f2 PS |
671 | } |
672 | ||
98403001 BP |
673 | static int validate_userspace(const struct nlattr *attr) |
674 | { | |
6455100f | 675 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { |
98403001 | 676 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, |
e995e3df | 677 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, |
98403001 BP |
678 | }; |
679 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
680 | int error; | |
681 | ||
6455100f PS |
682 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, |
683 | attr, userspace_policy); | |
98403001 BP |
684 | if (error) |
685 | return error; | |
686 | ||
6455100f PS |
687 | if (!a[OVS_USERSPACE_ATTR_PID] || |
688 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
98403001 BP |
689 | return -EINVAL; |
690 | ||
691 | return 0; | |
692 | } | |
693 | ||
9b405f1a PS |
694 | static int copy_action(const struct nlattr *from, |
695 | struct sw_flow_actions **sfa) | |
696 | { | |
697 | int totlen = NLA_ALIGN(from->nla_len); | |
698 | struct nlattr *to; | |
699 | ||
700 | to = reserve_sfa_size(sfa, from->nla_len); | |
701 | if (IS_ERR(to)) | |
702 | return PTR_ERR(to); | |
703 | ||
704 | memcpy(to, from, totlen); | |
705 | return 0; | |
706 | } | |
707 | ||
708 | static int validate_and_copy_actions(const struct nlattr *attr, | |
709 | const struct sw_flow_key *key, | |
710 | int depth, | |
711 | struct sw_flow_actions **sfa) | |
064af421 | 712 | { |
23cad98c | 713 | const struct nlattr *a; |
6ff686f2 PS |
714 | int rem, err; |
715 | ||
716 | if (depth >= SAMPLE_ACTION_DEPTH) | |
717 | return -EOVERFLOW; | |
23cad98c | 718 | |
37a1300c | 719 | nla_for_each_nested(a, attr, rem) { |
98403001 | 720 | /* Expected argument lengths, (u32)-1 for variable length. */ |
df2c07f4 | 721 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
fea393b1 | 722 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), |
98403001 | 723 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
fea393b1 BP |
724 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
725 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
4edb9ae9 | 726 | [OVS_ACTION_ATTR_SET] = (u32)-1, |
98403001 | 727 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1 |
23cad98c | 728 | }; |
fea393b1 | 729 | const struct ovs_action_push_vlan *vlan; |
23cad98c | 730 | int type = nla_type(a); |
9b405f1a | 731 | bool skip_copy; |
23cad98c | 732 | |
6ff686f2 | 733 | if (type > OVS_ACTION_ATTR_MAX || |
98403001 BP |
734 | (action_lens[type] != nla_len(a) && |
735 | action_lens[type] != (u32)-1)) | |
23cad98c BP |
736 | return -EINVAL; |
737 | ||
9b405f1a | 738 | skip_copy = false; |
23cad98c | 739 | switch (type) { |
df2c07f4 | 740 | case OVS_ACTION_ATTR_UNSPEC: |
cdee00fd | 741 | return -EINVAL; |
064af421 | 742 | |
98403001 BP |
743 | case OVS_ACTION_ATTR_USERSPACE: |
744 | err = validate_userspace(a); | |
745 | if (err) | |
746 | return err; | |
747 | break; | |
748 | ||
df2c07f4 | 749 | case OVS_ACTION_ATTR_OUTPUT: |
23cad98c BP |
750 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
751 | return -EINVAL; | |
3b1fc5f3 | 752 | break; |
cdee00fd | 753 | |
4edb9ae9 | 754 | |
fea393b1 BP |
755 | case OVS_ACTION_ATTR_POP_VLAN: |
756 | break; | |
757 | ||
758 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
759 | vlan = nla_data(a); | |
760 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
761 | return -EINVAL; | |
8ddc056d | 762 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) |
064af421 | 763 | return -EINVAL; |
23cad98c | 764 | break; |
064af421 | 765 | |
4edb9ae9 | 766 | case OVS_ACTION_ATTR_SET: |
9b405f1a | 767 | err = validate_set(a, key, sfa, &skip_copy); |
4edb9ae9 PS |
768 | if (err) |
769 | return err; | |
23cad98c | 770 | break; |
064af421 | 771 | |
6ff686f2 | 772 | case OVS_ACTION_ATTR_SAMPLE: |
9b405f1a | 773 | err = validate_and_copy_sample(a, key, depth, sfa); |
6ff686f2 PS |
774 | if (err) |
775 | return err; | |
9b405f1a | 776 | skip_copy = true; |
6ff686f2 PS |
777 | break; |
778 | ||
23cad98c | 779 | default: |
4edb9ae9 | 780 | return -EINVAL; |
23cad98c | 781 | } |
9b405f1a PS |
782 | if (!skip_copy) { |
783 | err = copy_action(a, sfa); | |
784 | if (err) | |
785 | return err; | |
786 | } | |
23cad98c | 787 | } |
3c5f6de3 | 788 | |
23cad98c BP |
789 | if (rem > 0) |
790 | return -EINVAL; | |
064af421 | 791 | |
23cad98c | 792 | return 0; |
064af421 | 793 | } |
4edb9ae9 | 794 | |
064af421 BP |
795 | static void clear_stats(struct sw_flow *flow) |
796 | { | |
6bfafa55 | 797 | flow->used = 0; |
064af421 | 798 | flow->tcp_flags = 0; |
064af421 BP |
799 | flow->packet_count = 0; |
800 | flow->byte_count = 0; | |
801 | } | |
802 | ||
df2c07f4 | 803 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 804 | { |
df2c07f4 | 805 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 806 | struct nlattr **a = info->attrs; |
e0e57990 | 807 | struct sw_flow_actions *acts; |
982b8810 | 808 | struct sk_buff *packet; |
e0e57990 | 809 | struct sw_flow *flow; |
f7cd0081 | 810 | struct datapath *dp; |
d6569377 | 811 | struct ethhdr *eth; |
3f19d399 | 812 | int len; |
d6569377 | 813 | int err; |
76abe283 | 814 | int key_len; |
064af421 | 815 | |
f7cd0081 | 816 | err = -EINVAL; |
df2c07f4 | 817 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 818 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 819 | goto err; |
064af421 | 820 | |
df2c07f4 | 821 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 822 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
823 | err = -ENOMEM; |
824 | if (!packet) | |
e5cad958 | 825 | goto err; |
3f19d399 BP |
826 | skb_reserve(packet, NET_IP_ALIGN); |
827 | ||
bf3d6fce | 828 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 829 | |
f7cd0081 BP |
830 | skb_reset_mac_header(packet); |
831 | eth = eth_hdr(packet); | |
064af421 | 832 | |
d6569377 BP |
833 | /* Normally, setting the skb 'protocol' field would be handled by a |
834 | * call to eth_type_trans(), but it assumes there's a sending | |
835 | * device, which we may not have. */ | |
7cd46155 | 836 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
f7cd0081 | 837 | packet->protocol = eth->h_proto; |
d6569377 | 838 | else |
f7cd0081 | 839 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 840 | |
e0e57990 | 841 | /* Build an sw_flow for sending this packet. */ |
850b6b3b | 842 | flow = ovs_flow_alloc(); |
e0e57990 BP |
843 | err = PTR_ERR(flow); |
844 | if (IS_ERR(flow)) | |
e5cad958 | 845 | goto err_kfree_skb; |
064af421 | 846 | |
850b6b3b | 847 | err = ovs_flow_extract(packet, -1, &flow->key, &key_len); |
e0e57990 | 848 | if (err) |
9321954a | 849 | goto err_flow_free; |
e0e57990 | 850 | |
13e24889 | 851 | err = ovs_flow_metadata_from_nlattrs(flow, key_len, a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 | 852 | if (err) |
9321954a | 853 | goto err_flow_free; |
9b405f1a | 854 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
e0e57990 BP |
855 | err = PTR_ERR(acts); |
856 | if (IS_ERR(acts)) | |
9321954a | 857 | goto err_flow_free; |
9b405f1a PS |
858 | |
859 | err = validate_and_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0, &acts); | |
e0e57990 | 860 | rcu_assign_pointer(flow->sf_acts, acts); |
9b405f1a PS |
861 | if (err) |
862 | goto err_flow_free; | |
e0e57990 BP |
863 | |
864 | OVS_CB(packet)->flow = flow; | |
abff858b | 865 | packet->priority = flow->key.phy.priority; |
72e8bf28 | 866 | skb_set_mark(packet, flow->key.phy.skb_mark); |
e0e57990 | 867 | |
d6569377 | 868 | rcu_read_lock(); |
2a4999f3 | 869 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 870 | err = -ENODEV; |
e5cad958 BP |
871 | if (!dp) |
872 | goto err_unlock; | |
cc4015df | 873 | |
e9141eec | 874 | local_bh_disable(); |
850b6b3b | 875 | err = ovs_execute_actions(dp, packet); |
e9141eec | 876 | local_bh_enable(); |
d6569377 | 877 | rcu_read_unlock(); |
e0e57990 | 878 | |
9321954a | 879 | ovs_flow_free(flow); |
e5cad958 | 880 | return err; |
064af421 | 881 | |
e5cad958 BP |
882 | err_unlock: |
883 | rcu_read_unlock(); | |
9321954a JG |
884 | err_flow_free: |
885 | ovs_flow_free(flow); | |
e5cad958 BP |
886 | err_kfree_skb: |
887 | kfree_skb(packet); | |
888 | err: | |
d6569377 | 889 | return err; |
064af421 BP |
890 | } |
891 | ||
df2c07f4 | 892 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc TG |
893 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18) |
894 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, | |
895 | #else | |
896 | [OVS_PACKET_ATTR_PACKET] = { .minlen = ETH_HLEN }, | |
897 | #endif | |
df2c07f4 JP |
898 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
899 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
900 | }; |
901 | ||
902 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 903 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
904 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
905 | .policy = packet_policy, | |
df2c07f4 | 906 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
907 | } |
908 | }; | |
909 | ||
df2c07f4 | 910 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) |
064af421 | 911 | { |
d6569377 | 912 | int i; |
20d035b2 | 913 | struct flow_table *table = genl_dereference(dp->table); |
f180c2e2 | 914 | |
850b6b3b | 915 | stats->n_flows = ovs_flow_tbl_count(table); |
064af421 | 916 | |
7257b535 | 917 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
d6569377 BP |
918 | for_each_possible_cpu(i) { |
919 | const struct dp_stats_percpu *percpu_stats; | |
920 | struct dp_stats_percpu local_stats; | |
821cb9fa | 921 | unsigned int start; |
44e05eca | 922 | |
d6569377 | 923 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 924 | |
d6569377 | 925 | do { |
821cb9fa | 926 | start = u64_stats_fetch_begin_bh(&percpu_stats->sync); |
d6569377 | 927 | local_stats = *percpu_stats; |
821cb9fa | 928 | } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); |
064af421 | 929 | |
d6569377 BP |
930 | stats->n_hit += local_stats.n_hit; |
931 | stats->n_missed += local_stats.n_missed; | |
932 | stats->n_lost += local_stats.n_lost; | |
933 | } | |
934 | } | |
064af421 | 935 | |
df2c07f4 JP |
936 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
937 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
938 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
939 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 940 | }; |
36956a7d | 941 | |
37a1300c BP |
942 | static struct genl_family dp_flow_genl_family = { |
943 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
944 | .hdrsize = sizeof(struct ovs_header), |
945 | .name = OVS_FLOW_FAMILY, | |
69685a88 | 946 | .version = OVS_FLOW_VERSION, |
2a4999f3 PS |
947 | .maxattr = OVS_FLOW_ATTR_MAX, |
948 | SET_NETNSOK | |
37a1300c | 949 | }; |
ed099e92 | 950 | |
850b6b3b | 951 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { |
df2c07f4 | 952 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
953 | }; |
954 | ||
9b405f1a PS |
955 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb); |
956 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) | |
957 | { | |
958 | const struct nlattr *a; | |
959 | struct nlattr *start; | |
960 | int err = 0, rem; | |
961 | ||
962 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
963 | if (!start) | |
964 | return -EMSGSIZE; | |
965 | ||
966 | nla_for_each_nested(a, attr, rem) { | |
967 | int type = nla_type(a); | |
968 | struct nlattr *st_sample; | |
969 | ||
970 | switch (type) { | |
971 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
972 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, sizeof(u32), nla_data(a))) | |
973 | return -EMSGSIZE; | |
974 | break; | |
975 | case OVS_SAMPLE_ATTR_ACTIONS: | |
976 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
977 | if (!st_sample) | |
978 | return -EMSGSIZE; | |
979 | err = actions_to_attr(nla_data(a), nla_len(a), skb); | |
980 | if (err) | |
981 | return err; | |
982 | nla_nest_end(skb, st_sample); | |
983 | break; | |
984 | } | |
985 | } | |
986 | ||
987 | nla_nest_end(skb, start); | |
988 | return err; | |
989 | } | |
990 | ||
991 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
992 | { | |
993 | const struct nlattr *ovs_key = nla_data(a); | |
994 | int key_type = nla_type(ovs_key); | |
995 | struct nlattr *start; | |
996 | int err; | |
997 | ||
998 | switch (key_type) { | |
999 | case OVS_KEY_ATTR_IPV4_TUNNEL: | |
1000 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); | |
1001 | if (!start) | |
1002 | return -EMSGSIZE; | |
1003 | ||
1004 | err = ipv4_tun_to_nlattr(skb, nla_data(ovs_key)); | |
1005 | if (err) | |
1006 | return err; | |
1007 | nla_nest_end(skb, start); | |
1008 | break; | |
1009 | default: | |
1010 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
1011 | return -EMSGSIZE; | |
1012 | break; | |
1013 | } | |
1014 | ||
1015 | return 0; | |
1016 | } | |
1017 | ||
1018 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb) | |
1019 | { | |
1020 | const struct nlattr *a; | |
1021 | int rem, err; | |
1022 | ||
1023 | nla_for_each_attr(a, attr, len, rem) { | |
1024 | int type = nla_type(a); | |
1025 | ||
1026 | switch (type) { | |
1027 | case OVS_ACTION_ATTR_SET: | |
1028 | err = set_action_to_attr(a, skb); | |
1029 | if (err) | |
1030 | return err; | |
1031 | break; | |
1032 | ||
1033 | case OVS_ACTION_ATTR_SAMPLE: | |
1034 | err = sample_action_to_attr(a, skb); | |
1035 | if (err) | |
1036 | return err; | |
1037 | break; | |
1038 | default: | |
1039 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
1040 | return -EMSGSIZE; | |
1041 | break; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | ||
37a1300c | 1048 | /* Called with genl_lock. */ |
df2c07f4 | 1049 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
28aea917 | 1050 | struct sk_buff *skb, u32 portid, |
6455100f | 1051 | u32 seq, u32 flags, u8 cmd) |
d6569377 | 1052 | { |
37a1300c | 1053 | const int skb_orig_len = skb->len; |
d6569377 | 1054 | const struct sw_flow_actions *sf_acts; |
9b405f1a | 1055 | struct nlattr *start; |
df2c07f4 JP |
1056 | struct ovs_flow_stats stats; |
1057 | struct ovs_header *ovs_header; | |
d6569377 BP |
1058 | struct nlattr *nla; |
1059 | unsigned long used; | |
1060 | u8 tcp_flags; | |
1061 | int err; | |
064af421 | 1062 | |
d6569377 | 1063 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 1064 | lockdep_genl_is_held()); |
064af421 | 1065 | |
28aea917 | 1066 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
df2c07f4 | 1067 | if (!ovs_header) |
37a1300c | 1068 | return -EMSGSIZE; |
d6569377 | 1069 | |
99769a40 | 1070 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 1071 | |
df2c07f4 | 1072 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
1073 | if (!nla) |
1074 | goto nla_put_failure; | |
850b6b3b | 1075 | err = ovs_flow_to_nlattrs(&flow->key, skb); |
d6569377 | 1076 | if (err) |
37a1300c | 1077 | goto error; |
d6569377 BP |
1078 | nla_nest_end(skb, nla); |
1079 | ||
1080 | spin_lock_bh(&flow->lock); | |
1081 | used = flow->used; | |
1082 | stats.n_packets = flow->packet_count; | |
1083 | stats.n_bytes = flow->byte_count; | |
1084 | tcp_flags = flow->tcp_flags; | |
1085 | spin_unlock_bh(&flow->lock); | |
1086 | ||
c3cc8c03 DM |
1087 | if (used && |
1088 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
1089 | goto nla_put_failure; | |
d6569377 | 1090 | |
c3cc8c03 DM |
1091 | if (stats.n_packets && |
1092 | nla_put(skb, OVS_FLOW_ATTR_STATS, | |
1093 | sizeof(struct ovs_flow_stats), &stats)) | |
1094 | goto nla_put_failure; | |
d6569377 | 1095 | |
c3cc8c03 DM |
1096 | if (tcp_flags && |
1097 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags)) | |
1098 | goto nla_put_failure; | |
d6569377 | 1099 | |
df2c07f4 | 1100 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
1101 | * this is the first flow to be dumped into 'skb'. This is unusual for |
1102 | * Netlink but individual action lists can be longer than | |
1103 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
1104 | * The userspace caller can always fetch the actions separately if it | |
1105 | * really wants them. (Most userspace callers in fact don't care.) | |
1106 | * | |
1107 | * This can only fail for dump operations because the skb is always | |
1108 | * properly sized for single flows. | |
1109 | */ | |
9b405f1a | 1110 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee PS |
1111 | if (start) { |
1112 | err = actions_to_attr(sf_acts->actions, sf_acts->actions_len, skb); | |
0a25b039 BP |
1113 | if (!err) |
1114 | nla_nest_end(skb, start); | |
1115 | else { | |
1116 | if (skb_orig_len) | |
1117 | goto error; | |
1118 | ||
1119 | nla_nest_cancel(skb, start); | |
1120 | } | |
7aac03bd JG |
1121 | } else if (skb_orig_len) |
1122 | goto nla_put_failure; | |
37a1300c | 1123 | |
df2c07f4 | 1124 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1125 | |
1126 | nla_put_failure: | |
1127 | err = -EMSGSIZE; | |
37a1300c | 1128 | error: |
df2c07f4 | 1129 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 1130 | return err; |
44e05eca BP |
1131 | } |
1132 | ||
df2c07f4 | 1133 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) |
44e05eca | 1134 | { |
37a1300c BP |
1135 | const struct sw_flow_actions *sf_acts; |
1136 | int len; | |
d6569377 | 1137 | |
37a1300c BP |
1138 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
1139 | lockdep_genl_is_held()); | |
d6569377 | 1140 | |
6455100f PS |
1141 | /* OVS_FLOW_ATTR_KEY */ |
1142 | len = nla_total_size(FLOW_BUFSIZE); | |
1143 | /* OVS_FLOW_ATTR_ACTIONS */ | |
1144 | len += nla_total_size(sf_acts->actions_len); | |
1145 | /* OVS_FLOW_ATTR_STATS */ | |
1146 | len += nla_total_size(sizeof(struct ovs_flow_stats)); | |
1147 | /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
1148 | len += nla_total_size(1); | |
1149 | /* OVS_FLOW_ATTR_USED */ | |
1150 | len += nla_total_size(8); | |
1151 | ||
1152 | len += NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1153 | ||
1154 | return genlmsg_new(len, GFP_KERNEL); | |
37a1300c | 1155 | } |
8d5ebd83 | 1156 | |
6455100f PS |
1157 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, |
1158 | struct datapath *dp, | |
28aea917 | 1159 | u32 portid, u32 seq, u8 cmd) |
37a1300c BP |
1160 | { |
1161 | struct sk_buff *skb; | |
1162 | int retval; | |
d6569377 | 1163 | |
df2c07f4 | 1164 | skb = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1165 | if (!skb) |
1166 | return ERR_PTR(-ENOMEM); | |
d6569377 | 1167 | |
28aea917 | 1168 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, portid, seq, 0, cmd); |
37a1300c | 1169 | BUG_ON(retval < 0); |
d6569377 | 1170 | return skb; |
064af421 BP |
1171 | } |
1172 | ||
df2c07f4 | 1173 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1174 | { |
37a1300c | 1175 | struct nlattr **a = info->attrs; |
df2c07f4 | 1176 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1177 | struct sw_flow_key key; |
d6569377 | 1178 | struct sw_flow *flow; |
37a1300c | 1179 | struct sk_buff *reply; |
9c52546b | 1180 | struct datapath *dp; |
3544358a | 1181 | struct flow_table *table; |
9b405f1a | 1182 | struct sw_flow_actions *acts = NULL; |
bc4a05c6 | 1183 | int error; |
76abe283 | 1184 | int key_len; |
064af421 | 1185 | |
37a1300c BP |
1186 | /* Extract key. */ |
1187 | error = -EINVAL; | |
df2c07f4 | 1188 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1189 | goto error; |
850b6b3b | 1190 | error = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1191 | if (error) |
1192 | goto error; | |
064af421 | 1193 | |
37a1300c | 1194 | /* Validate actions. */ |
df2c07f4 | 1195 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
9b405f1a PS |
1196 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
1197 | error = PTR_ERR(acts); | |
1198 | if (IS_ERR(acts)) | |
37a1300c | 1199 | goto error; |
9b405f1a PS |
1200 | |
1201 | error = validate_and_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0, &acts); | |
1202 | if (error) | |
1203 | goto err_kfree; | |
df2c07f4 | 1204 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
1205 | error = -EINVAL; |
1206 | goto error; | |
1207 | } | |
1208 | ||
2a4999f3 | 1209 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
d6569377 | 1210 | error = -ENODEV; |
9c52546b | 1211 | if (!dp) |
9b405f1a | 1212 | goto err_kfree; |
704a1e09 | 1213 | |
20d035b2 | 1214 | table = genl_dereference(dp->table); |
850b6b3b | 1215 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1216 | if (!flow) { |
d6569377 BP |
1217 | /* Bail out if we're not allowed to create a new flow. */ |
1218 | error = -ENOENT; | |
df2c07f4 | 1219 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
9b405f1a | 1220 | goto err_kfree; |
d6569377 BP |
1221 | |
1222 | /* Expand table, if necessary, to make room. */ | |
850b6b3b | 1223 | if (ovs_flow_tbl_need_to_expand(table)) { |
3544358a PS |
1224 | struct flow_table *new_table; |
1225 | ||
850b6b3b | 1226 | new_table = ovs_flow_tbl_expand(table); |
3544358a PS |
1227 | if (!IS_ERR(new_table)) { |
1228 | rcu_assign_pointer(dp->table, new_table); | |
850b6b3b | 1229 | ovs_flow_tbl_deferred_destroy(table); |
20d035b2 | 1230 | table = genl_dereference(dp->table); |
3544358a | 1231 | } |
d6569377 BP |
1232 | } |
1233 | ||
1234 | /* Allocate flow. */ | |
850b6b3b | 1235 | flow = ovs_flow_alloc(); |
d6569377 BP |
1236 | if (IS_ERR(flow)) { |
1237 | error = PTR_ERR(flow); | |
9b405f1a | 1238 | goto err_kfree; |
d6569377 | 1239 | } |
d6569377 BP |
1240 | clear_stats(flow); |
1241 | ||
d6569377 BP |
1242 | rcu_assign_pointer(flow->sf_acts, acts); |
1243 | ||
d6569377 | 1244 | /* Put flow in bucket. */ |
13e24889 | 1245 | ovs_flow_tbl_insert(table, flow, &key, key_len); |
37a1300c | 1246 | |
28aea917 | 1247 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f PS |
1248 | info->snd_seq, |
1249 | OVS_FLOW_CMD_NEW); | |
d6569377 BP |
1250 | } else { |
1251 | /* We found a matching flow. */ | |
1252 | struct sw_flow_actions *old_acts; | |
1253 | ||
1254 | /* Bail out if we're not allowed to modify an existing flow. | |
1255 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1256 | * because Generic Netlink treats the latter as a dump | |
1257 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1258 | * gets fixed. | |
1259 | */ | |
1260 | error = -EEXIST; | |
df2c07f4 | 1261 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c | 1262 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
9b405f1a | 1263 | goto err_kfree; |
d6569377 BP |
1264 | |
1265 | /* Update actions. */ | |
d6569377 | 1266 | old_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 1267 | lockdep_genl_is_held()); |
9b405f1a PS |
1268 | rcu_assign_pointer(flow->sf_acts, acts); |
1269 | ovs_flow_deferred_free_acts(old_acts); | |
d6569377 | 1270 | |
28aea917 | 1271 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f | 1272 | info->snd_seq, OVS_FLOW_CMD_NEW); |
d6569377 BP |
1273 | |
1274 | /* Clear stats. */ | |
df2c07f4 | 1275 | if (a[OVS_FLOW_ATTR_CLEAR]) { |
d6569377 BP |
1276 | spin_lock_bh(&flow->lock); |
1277 | clear_stats(flow); | |
1278 | spin_unlock_bh(&flow->lock); | |
1279 | } | |
9c52546b | 1280 | } |
37a1300c BP |
1281 | |
1282 | if (!IS_ERR(reply)) | |
28aea917 | 1283 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b JG |
1284 | ovs_dp_flow_multicast_group.id, info->nlhdr, |
1285 | GFP_KERNEL); | |
37a1300c | 1286 | else |
2a4999f3 PS |
1287 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
1288 | ovs_dp_flow_multicast_group.id, PTR_ERR(reply)); | |
d6569377 | 1289 | return 0; |
704a1e09 | 1290 | |
9b405f1a | 1291 | err_kfree: |
ba400435 | 1292 | kfree(acts); |
37a1300c | 1293 | error: |
9c52546b | 1294 | return error; |
704a1e09 BP |
1295 | } |
1296 | ||
df2c07f4 | 1297 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1298 | { |
37a1300c | 1299 | struct nlattr **a = info->attrs; |
df2c07f4 | 1300 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1301 | struct sw_flow_key key; |
37a1300c | 1302 | struct sk_buff *reply; |
704a1e09 | 1303 | struct sw_flow *flow; |
9c52546b | 1304 | struct datapath *dp; |
3544358a | 1305 | struct flow_table *table; |
9c52546b | 1306 | int err; |
76abe283 | 1307 | int key_len; |
704a1e09 | 1308 | |
df2c07f4 | 1309 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1310 | return -EINVAL; |
850b6b3b | 1311 | err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1312 | if (err) |
1313 | return err; | |
704a1e09 | 1314 | |
2a4999f3 | 1315 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
9c52546b | 1316 | if (!dp) |
ed099e92 | 1317 | return -ENODEV; |
704a1e09 | 1318 | |
20d035b2 | 1319 | table = genl_dereference(dp->table); |
850b6b3b | 1320 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1321 | if (!flow) |
ed099e92 | 1322 | return -ENOENT; |
d6569377 | 1323 | |
28aea917 | 1324 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f | 1325 | info->snd_seq, OVS_FLOW_CMD_NEW); |
37a1300c BP |
1326 | if (IS_ERR(reply)) |
1327 | return PTR_ERR(reply); | |
36956a7d | 1328 | |
37a1300c | 1329 | return genlmsg_reply(reply, info); |
d6569377 | 1330 | } |
9c52546b | 1331 | |
df2c07f4 | 1332 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1333 | { |
37a1300c | 1334 | struct nlattr **a = info->attrs; |
df2c07f4 | 1335 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1336 | struct sw_flow_key key; |
37a1300c | 1337 | struct sk_buff *reply; |
d6569377 | 1338 | struct sw_flow *flow; |
d6569377 | 1339 | struct datapath *dp; |
3544358a | 1340 | struct flow_table *table; |
d6569377 | 1341 | int err; |
76abe283 | 1342 | int key_len; |
36956a7d | 1343 | |
2a4999f3 PS |
1344 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
1345 | if (!dp) | |
1346 | return -ENODEV; | |
1347 | ||
df2c07f4 | 1348 | if (!a[OVS_FLOW_ATTR_KEY]) |
2a4999f3 PS |
1349 | return flush_flows(dp); |
1350 | ||
850b6b3b | 1351 | err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1352 | if (err) |
1353 | return err; | |
d6569377 | 1354 | |
20d035b2 | 1355 | table = genl_dereference(dp->table); |
850b6b3b | 1356 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1357 | if (!flow) |
37a1300c | 1358 | return -ENOENT; |
d6569377 | 1359 | |
df2c07f4 | 1360 | reply = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1361 | if (!reply) |
1362 | return -ENOMEM; | |
1363 | ||
850b6b3b | 1364 | ovs_flow_tbl_remove(table, flow); |
37a1300c | 1365 | |
28aea917 | 1366 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid, |
df2c07f4 | 1367 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); |
37a1300c BP |
1368 | BUG_ON(err < 0); |
1369 | ||
850b6b3b | 1370 | ovs_flow_deferred_free(flow); |
37a1300c | 1371 | |
28aea917 | 1372 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b | 1373 | ovs_dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); |
37a1300c BP |
1374 | return 0; |
1375 | } | |
1376 | ||
df2c07f4 | 1377 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1378 | { |
df2c07f4 | 1379 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
37a1300c | 1380 | struct datapath *dp; |
20d035b2 | 1381 | struct flow_table *table; |
37a1300c | 1382 | |
2a4999f3 | 1383 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
37a1300c BP |
1384 | if (!dp) |
1385 | return -ENODEV; | |
1386 | ||
20d035b2 JG |
1387 | table = genl_dereference(dp->table); |
1388 | ||
37a1300c | 1389 | for (;;) { |
37a1300c BP |
1390 | struct sw_flow *flow; |
1391 | u32 bucket, obj; | |
1392 | ||
1393 | bucket = cb->args[0]; | |
1394 | obj = cb->args[1]; | |
850b6b3b | 1395 | flow = ovs_flow_tbl_next(table, &bucket, &obj); |
3544358a | 1396 | if (!flow) |
37a1300c BP |
1397 | break; |
1398 | ||
6455100f | 1399 | if (ovs_flow_cmd_fill_info(flow, dp, skb, |
28aea917 | 1400 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1401 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1402 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1403 | break; |
1404 | ||
1405 | cb->args[0] = bucket; | |
1406 | cb->args[1] = obj; | |
1407 | } | |
1408 | return skb->len; | |
704a1e09 BP |
1409 | } |
1410 | ||
37a1300c | 1411 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1412 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1413 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1414 | .policy = flow_policy, | |
df2c07f4 | 1415 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1416 | }, |
df2c07f4 | 1417 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1418 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1419 | .policy = flow_policy, | |
df2c07f4 | 1420 | .doit = ovs_flow_cmd_del |
37a1300c | 1421 | }, |
df2c07f4 | 1422 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1423 | .flags = 0, /* OK for unprivileged users. */ |
1424 | .policy = flow_policy, | |
df2c07f4 JP |
1425 | .doit = ovs_flow_cmd_get, |
1426 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1427 | }, |
df2c07f4 | 1428 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1429 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1430 | .policy = flow_policy, | |
df2c07f4 | 1431 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1432 | }, |
1433 | }; | |
1434 | ||
df2c07f4 | 1435 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
aaff4b55 | 1436 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1437 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
aaff4b55 | 1438 | #endif |
b063d9f0 | 1439 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
d6569377 BP |
1440 | }; |
1441 | ||
aaff4b55 BP |
1442 | static struct genl_family dp_datapath_genl_family = { |
1443 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1444 | .hdrsize = sizeof(struct ovs_header), |
1445 | .name = OVS_DATAPATH_FAMILY, | |
69685a88 | 1446 | .version = OVS_DATAPATH_VERSION, |
2a4999f3 PS |
1447 | .maxattr = OVS_DP_ATTR_MAX, |
1448 | SET_NETNSOK | |
aaff4b55 BP |
1449 | }; |
1450 | ||
850b6b3b | 1451 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
df2c07f4 | 1452 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1453 | }; |
1454 | ||
df2c07f4 | 1455 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1456 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1457 | { |
df2c07f4 | 1458 | struct ovs_header *ovs_header; |
e926dfe3 | 1459 | struct ovs_dp_stats dp_stats; |
064af421 BP |
1460 | int err; |
1461 | ||
28aea917 | 1462 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1463 | flags, cmd); |
df2c07f4 | 1464 | if (!ovs_header) |
aaff4b55 | 1465 | goto error; |
064af421 | 1466 | |
b063d9f0 | 1467 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1468 | |
d6569377 | 1469 | rcu_read_lock(); |
850b6b3b | 1470 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
d6569377 | 1471 | rcu_read_unlock(); |
064af421 | 1472 | if (err) |
d6569377 | 1473 | goto nla_put_failure; |
064af421 | 1474 | |
e926dfe3 | 1475 | get_dp_stats(dp, &dp_stats); |
c3cc8c03 DM |
1476 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats)) |
1477 | goto nla_put_failure; | |
d6569377 | 1478 | |
df2c07f4 | 1479 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1480 | |
1481 | nla_put_failure: | |
df2c07f4 | 1482 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1483 | error: |
1484 | return -EMSGSIZE; | |
d6569377 BP |
1485 | } |
1486 | ||
28aea917 | 1487 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 portid, |
aaff4b55 | 1488 | u32 seq, u8 cmd) |
d6569377 | 1489 | { |
d6569377 | 1490 | struct sk_buff *skb; |
aaff4b55 | 1491 | int retval; |
d6569377 | 1492 | |
aaff4b55 | 1493 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
064af421 | 1494 | if (!skb) |
d6569377 | 1495 | return ERR_PTR(-ENOMEM); |
659586ef | 1496 | |
28aea917 | 1497 | retval = ovs_dp_cmd_fill_info(dp, skb, portid, seq, 0, cmd); |
aaff4b55 BP |
1498 | if (retval < 0) { |
1499 | kfree_skb(skb); | |
1500 | return ERR_PTR(retval); | |
1501 | } | |
1502 | return skb; | |
1503 | } | |
9dca7bd5 | 1504 | |
df2c07f4 | 1505 | static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
aaff4b55 | 1506 | { |
df2c07f4 | 1507 | return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1); |
d6569377 BP |
1508 | } |
1509 | ||
ed099e92 | 1510 | /* Called with genl_mutex and optionally with RTNL lock also. */ |
2a4999f3 PS |
1511 | static struct datapath *lookup_datapath(struct net *net, |
1512 | struct ovs_header *ovs_header, | |
6455100f | 1513 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1514 | { |
254f2dc8 BP |
1515 | struct datapath *dp; |
1516 | ||
df2c07f4 | 1517 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1518 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1519 | else { |
d6569377 | 1520 | struct vport *vport; |
d6569377 | 1521 | |
057dd6d2 | 1522 | rcu_read_lock(); |
2a4999f3 | 1523 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1524 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
057dd6d2 | 1525 | rcu_read_unlock(); |
d6569377 | 1526 | } |
254f2dc8 | 1527 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1528 | } |
1529 | ||
df2c07f4 | 1530 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1531 | { |
aaff4b55 | 1532 | struct nlattr **a = info->attrs; |
d6569377 | 1533 | struct vport_parms parms; |
aaff4b55 | 1534 | struct sk_buff *reply; |
d6569377 BP |
1535 | struct datapath *dp; |
1536 | struct vport *vport; | |
2a4999f3 | 1537 | struct ovs_net *ovs_net; |
95b1d73a | 1538 | int err, i; |
d6569377 | 1539 | |
d6569377 | 1540 | err = -EINVAL; |
ea36840f | 1541 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1542 | goto err; |
1543 | ||
df2c07f4 | 1544 | err = ovs_dp_cmd_validate(a); |
aaff4b55 BP |
1545 | if (err) |
1546 | goto err; | |
d6569377 BP |
1547 | |
1548 | rtnl_lock(); | |
d6569377 | 1549 | |
d6569377 BP |
1550 | err = -ENOMEM; |
1551 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1552 | if (dp == NULL) | |
2a4999f3 PS |
1553 | goto err_unlock_rtnl; |
1554 | ||
0ceaa66c JG |
1555 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1556 | ||
d6569377 BP |
1557 | /* Allocate table. */ |
1558 | err = -ENOMEM; | |
850b6b3b | 1559 | rcu_assign_pointer(dp->table, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS)); |
d6569377 BP |
1560 | if (!dp->table) |
1561 | goto err_free_dp; | |
1562 | ||
99769a40 JG |
1563 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); |
1564 | if (!dp->stats_percpu) { | |
1565 | err = -ENOMEM; | |
1566 | goto err_destroy_table; | |
1567 | } | |
1568 | ||
95b1d73a PS |
1569 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1570 | GFP_KERNEL); | |
1571 | if (!dp->ports) { | |
1572 | err = -ENOMEM; | |
1573 | goto err_destroy_percpu; | |
1574 | } | |
1575 | ||
1576 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1577 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1578 | ||
d6569377 | 1579 | /* Set up our datapath device. */ |
df2c07f4 JP |
1580 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1581 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1582 | parms.options = NULL; |
1583 | parms.dp = dp; | |
df2c07f4 | 1584 | parms.port_no = OVSP_LOCAL; |
28aea917 | 1585 | parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
b063d9f0 | 1586 | |
d6569377 BP |
1587 | vport = new_vport(&parms); |
1588 | if (IS_ERR(vport)) { | |
1589 | err = PTR_ERR(vport); | |
1590 | if (err == -EBUSY) | |
1591 | err = -EEXIST; | |
1592 | ||
95b1d73a | 1593 | goto err_destroy_ports_array; |
d6569377 | 1594 | } |
d6569377 | 1595 | |
28aea917 | 1596 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1597 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1598 | err = PTR_ERR(reply); |
1599 | if (IS_ERR(reply)) | |
1600 | goto err_destroy_local_port; | |
1601 | ||
2a4999f3 PS |
1602 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
1603 | list_add_tail(&dp->list_node, &ovs_net->dps); | |
d6569377 | 1604 | |
d6569377 BP |
1605 | rtnl_unlock(); |
1606 | ||
28aea917 | 1607 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b JG |
1608 | ovs_dp_datapath_multicast_group.id, info->nlhdr, |
1609 | GFP_KERNEL); | |
d6569377 BP |
1610 | return 0; |
1611 | ||
1612 | err_destroy_local_port: | |
95b1d73a PS |
1613 | ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL)); |
1614 | err_destroy_ports_array: | |
1615 | kfree(dp->ports); | |
99769a40 JG |
1616 | err_destroy_percpu: |
1617 | free_percpu(dp->stats_percpu); | |
d6569377 | 1618 | err_destroy_table: |
850b6b3b | 1619 | ovs_flow_tbl_destroy(genl_dereference(dp->table)); |
d6569377 | 1620 | err_free_dp: |
0ceaa66c | 1621 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1622 | kfree(dp); |
ed099e92 | 1623 | err_unlock_rtnl: |
d6569377 | 1624 | rtnl_unlock(); |
d6569377 | 1625 | err: |
064af421 BP |
1626 | return err; |
1627 | } | |
1628 | ||
2a4999f3 PS |
1629 | /* Called with genl_mutex. */ |
1630 | static void __dp_destroy(struct datapath *dp) | |
44e05eca | 1631 | { |
95b1d73a | 1632 | int i; |
44e05eca | 1633 | |
d6569377 | 1634 | rtnl_lock(); |
95b1d73a PS |
1635 | |
1636 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1637 | struct vport *vport; | |
f8dfbcb7 | 1638 | struct hlist_node *n; |
95b1d73a | 1639 | |
f8dfbcb7 | 1640 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1641 | if (vport->port_no != OVSP_LOCAL) |
1642 | ovs_dp_detach_port(vport); | |
1643 | } | |
ed099e92 | 1644 | |
254f2dc8 | 1645 | list_del(&dp->list_node); |
95b1d73a | 1646 | ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL)); |
ed099e92 | 1647 | |
99620d2c JG |
1648 | /* rtnl_unlock() will wait until all the references to devices that |
1649 | * are pending unregistration have been dropped. We do it here to | |
1650 | * ensure that any internal devices (which contain DP pointers) are | |
1651 | * fully destroyed before freeing the datapath. | |
1652 | */ | |
1653 | rtnl_unlock(); | |
1654 | ||
ed099e92 | 1655 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1656 | } |
1657 | ||
1658 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1659 | { | |
1660 | struct sk_buff *reply; | |
1661 | struct datapath *dp; | |
1662 | int err; | |
1663 | ||
1664 | err = ovs_dp_cmd_validate(info->attrs); | |
1665 | if (err) | |
1666 | return err; | |
1667 | ||
1668 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
1669 | err = PTR_ERR(dp); | |
1670 | if (IS_ERR(dp)) | |
1671 | return err; | |
1672 | ||
28aea917 | 1673 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
2a4999f3 PS |
1674 | info->snd_seq, OVS_DP_CMD_DEL); |
1675 | err = PTR_ERR(reply); | |
1676 | if (IS_ERR(reply)) | |
1677 | return err; | |
1678 | ||
1679 | __dp_destroy(dp); | |
ed099e92 | 1680 | |
28aea917 | 1681 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b JG |
1682 | ovs_dp_datapath_multicast_group.id, info->nlhdr, |
1683 | GFP_KERNEL); | |
99620d2c JG |
1684 | |
1685 | return 0; | |
44e05eca BP |
1686 | } |
1687 | ||
df2c07f4 | 1688 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1689 | { |
aaff4b55 | 1690 | struct sk_buff *reply; |
d6569377 | 1691 | struct datapath *dp; |
d6569377 | 1692 | int err; |
064af421 | 1693 | |
df2c07f4 | 1694 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1695 | if (err) |
1696 | return err; | |
38c6ecbc | 1697 | |
2a4999f3 | 1698 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
d6569377 | 1699 | if (IS_ERR(dp)) |
aaff4b55 | 1700 | return PTR_ERR(dp); |
38c6ecbc | 1701 | |
28aea917 | 1702 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1703 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1704 | if (IS_ERR(reply)) { |
1705 | err = PTR_ERR(reply); | |
2a4999f3 | 1706 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
850b6b3b | 1707 | ovs_dp_datapath_multicast_group.id, err); |
aaff4b55 BP |
1708 | return 0; |
1709 | } | |
1710 | ||
28aea917 | 1711 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b JG |
1712 | ovs_dp_datapath_multicast_group.id, info->nlhdr, |
1713 | GFP_KERNEL); | |
1714 | ||
aaff4b55 | 1715 | return 0; |
064af421 BP |
1716 | } |
1717 | ||
df2c07f4 | 1718 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1719 | { |
aaff4b55 | 1720 | struct sk_buff *reply; |
d6569377 | 1721 | struct datapath *dp; |
d6569377 | 1722 | int err; |
1dcf111b | 1723 | |
df2c07f4 | 1724 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1725 | if (err) |
1726 | return err; | |
1dcf111b | 1727 | |
2a4999f3 | 1728 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
d6569377 | 1729 | if (IS_ERR(dp)) |
aaff4b55 | 1730 | return PTR_ERR(dp); |
1dcf111b | 1731 | |
28aea917 | 1732 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1733 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1734 | if (IS_ERR(reply)) |
1735 | return PTR_ERR(reply); | |
1736 | ||
1737 | return genlmsg_reply(reply, info); | |
1dcf111b JP |
1738 | } |
1739 | ||
df2c07f4 | 1740 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1741 | { |
2a4999f3 | 1742 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1743 | struct datapath *dp; |
1744 | int skip = cb->args[0]; | |
1745 | int i = 0; | |
a7786963 | 1746 | |
2a4999f3 | 1747 | list_for_each_entry(dp, &ovs_net->dps, list_node) { |
a2bab2f0 | 1748 | if (i >= skip && |
28aea917 | 1749 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1750 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1751 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1752 | break; |
254f2dc8 | 1753 | i++; |
a7786963 | 1754 | } |
aaff4b55 | 1755 | |
254f2dc8 BP |
1756 | cb->args[0] = i; |
1757 | ||
aaff4b55 | 1758 | return skb->len; |
c19e6535 BP |
1759 | } |
1760 | ||
aaff4b55 | 1761 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1762 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1763 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1764 | .policy = datapath_policy, | |
df2c07f4 | 1765 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1766 | }, |
df2c07f4 | 1767 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1768 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1769 | .policy = datapath_policy, | |
df2c07f4 | 1770 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1771 | }, |
df2c07f4 | 1772 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1773 | .flags = 0, /* OK for unprivileged users. */ |
1774 | .policy = datapath_policy, | |
df2c07f4 JP |
1775 | .doit = ovs_dp_cmd_get, |
1776 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1777 | }, |
df2c07f4 | 1778 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1779 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1780 | .policy = datapath_policy, | |
df2c07f4 | 1781 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1782 | }, |
1783 | }; | |
1784 | ||
df2c07f4 | 1785 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
f0fef760 | 1786 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1787 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1788 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
f0fef760 | 1789 | #else |
f613a0d7 | 1790 | [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) }, |
f0fef760 | 1791 | #endif |
d48c88ec JG |
1792 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1793 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1794 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1795 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1796 | }; |
1797 | ||
f0fef760 BP |
1798 | static struct genl_family dp_vport_genl_family = { |
1799 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1800 | .hdrsize = sizeof(struct ovs_header), |
1801 | .name = OVS_VPORT_FAMILY, | |
69685a88 | 1802 | .version = OVS_VPORT_VERSION, |
2a4999f3 PS |
1803 | .maxattr = OVS_VPORT_ATTR_MAX, |
1804 | SET_NETNSOK | |
f0fef760 BP |
1805 | }; |
1806 | ||
850b6b3b | 1807 | struct genl_multicast_group ovs_dp_vport_multicast_group = { |
df2c07f4 | 1808 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1809 | }; |
1810 | ||
1811 | /* Called with RTNL lock or RCU read lock. */ | |
df2c07f4 | 1812 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1813 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1814 | { |
df2c07f4 | 1815 | struct ovs_header *ovs_header; |
e926dfe3 | 1816 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1817 | int err; |
1818 | ||
28aea917 | 1819 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1820 | flags, cmd); |
df2c07f4 | 1821 | if (!ovs_header) |
f0fef760 | 1822 | return -EMSGSIZE; |
c19e6535 | 1823 | |
99769a40 | 1824 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1825 | |
c3cc8c03 DM |
1826 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1827 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
1828 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || | |
28aea917 | 1829 | nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid)) |
c3cc8c03 | 1830 | goto nla_put_failure; |
c19e6535 | 1831 | |
850b6b3b | 1832 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1833 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1834 | &vport_stats)) | |
1835 | goto nla_put_failure; | |
c19e6535 | 1836 | |
850b6b3b | 1837 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1838 | if (err == -EMSGSIZE) |
1839 | goto error; | |
c19e6535 | 1840 | |
df2c07f4 | 1841 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1842 | |
1843 | nla_put_failure: | |
1844 | err = -EMSGSIZE; | |
f0fef760 | 1845 | error: |
df2c07f4 | 1846 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1847 | return err; |
064af421 BP |
1848 | } |
1849 | ||
f0fef760 | 1850 | /* Called with RTNL lock or RCU read lock. */ |
28aea917 | 1851 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 1852 | u32 seq, u8 cmd) |
064af421 | 1853 | { |
c19e6535 | 1854 | struct sk_buff *skb; |
f0fef760 | 1855 | int retval; |
c19e6535 | 1856 | |
f0fef760 | 1857 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1858 | if (!skb) |
1859 | return ERR_PTR(-ENOMEM); | |
1860 | ||
28aea917 | 1861 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
1862 | BUG_ON(retval < 0); |
1863 | ||
c19e6535 | 1864 | return skb; |
f0fef760 | 1865 | } |
c19e6535 | 1866 | |
df2c07f4 | 1867 | static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
f0fef760 | 1868 | { |
df2c07f4 | 1869 | return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1); |
c19e6535 | 1870 | } |
51d4d598 | 1871 | |
ed099e92 | 1872 | /* Called with RTNL lock or RCU read lock. */ |
2a4999f3 PS |
1873 | static struct vport *lookup_vport(struct net *net, |
1874 | struct ovs_header *ovs_header, | |
df2c07f4 | 1875 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1876 | { |
1877 | struct datapath *dp; | |
1878 | struct vport *vport; | |
1879 | ||
df2c07f4 | 1880 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1881 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1882 | if (!vport) |
c19e6535 | 1883 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1884 | if (ovs_header->dp_ifindex && |
1885 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1886 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1887 | return vport; |
df2c07f4 JP |
1888 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1889 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1890 | |
1891 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1892 | return ERR_PTR(-EFBIG); |
c19e6535 | 1893 | |
2a4999f3 | 1894 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1895 | if (!dp) |
1896 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1897 | |
95b1d73a | 1898 | vport = ovs_vport_rtnl_rcu(dp, port_no); |
ed099e92 | 1899 | if (!vport) |
17535c57 | 1900 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1901 | return vport; |
1902 | } else | |
1903 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1904 | } |
1905 | ||
df2c07f4 | 1906 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1907 | { |
f0fef760 | 1908 | struct nlattr **a = info->attrs; |
df2c07f4 | 1909 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1910 | struct vport_parms parms; |
ed099e92 | 1911 | struct sk_buff *reply; |
c19e6535 | 1912 | struct vport *vport; |
c19e6535 | 1913 | struct datapath *dp; |
b0ec0f27 | 1914 | u32 port_no; |
c19e6535 | 1915 | int err; |
b0ec0f27 | 1916 | |
c19e6535 | 1917 | err = -EINVAL; |
ea36840f BP |
1918 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1919 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
f0fef760 BP |
1920 | goto exit; |
1921 | ||
df2c07f4 | 1922 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1923 | if (err) |
1924 | goto exit; | |
51d4d598 | 1925 | |
c19e6535 | 1926 | rtnl_lock(); |
2a4999f3 | 1927 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1928 | err = -ENODEV; |
1929 | if (!dp) | |
ed099e92 | 1930 | goto exit_unlock; |
c19e6535 | 1931 | |
df2c07f4 JP |
1932 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1933 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1934 | |
1935 | err = -EFBIG; | |
1936 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 1937 | goto exit_unlock; |
c19e6535 | 1938 | |
95b1d73a | 1939 | vport = ovs_vport_rtnl(dp, port_no); |
c19e6535 BP |
1940 | err = -EBUSY; |
1941 | if (vport) | |
ed099e92 | 1942 | goto exit_unlock; |
c19e6535 BP |
1943 | } else { |
1944 | for (port_no = 1; ; port_no++) { | |
1945 | if (port_no >= DP_MAX_PORTS) { | |
1946 | err = -EFBIG; | |
ed099e92 | 1947 | goto exit_unlock; |
c19e6535 | 1948 | } |
95b1d73a | 1949 | vport = ovs_vport_rtnl(dp, port_no); |
c19e6535 BP |
1950 | if (!vport) |
1951 | break; | |
51d4d598 | 1952 | } |
064af421 | 1953 | } |
b0ec0f27 | 1954 | |
df2c07f4 JP |
1955 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1956 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1957 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1958 | parms.dp = dp; |
1959 | parms.port_no = port_no; | |
28aea917 | 1960 | parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 BP |
1961 | |
1962 | vport = new_vport(&parms); | |
1963 | err = PTR_ERR(vport); | |
1964 | if (IS_ERR(vport)) | |
ed099e92 | 1965 | goto exit_unlock; |
c19e6535 | 1966 | |
faef6d2d | 1967 | err = 0; |
1fc7083d JG |
1968 | if (a[OVS_VPORT_ATTR_STATS]) |
1969 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
1970 | ||
1971 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, | |
1972 | OVS_VPORT_CMD_NEW); | |
1973 | if (IS_ERR(reply)) { | |
1974 | err = PTR_ERR(reply); | |
850b6b3b | 1975 | ovs_dp_detach_port(vport); |
ed099e92 | 1976 | goto exit_unlock; |
c19e6535 | 1977 | } |
28aea917 | 1978 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b | 1979 | ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); |
c19e6535 | 1980 | |
ed099e92 | 1981 | exit_unlock: |
c19e6535 | 1982 | rtnl_unlock(); |
c19e6535 BP |
1983 | exit: |
1984 | return err; | |
44e05eca BP |
1985 | } |
1986 | ||
df2c07f4 | 1987 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1988 | { |
f0fef760 BP |
1989 | struct nlattr **a = info->attrs; |
1990 | struct sk_buff *reply; | |
c19e6535 | 1991 | struct vport *vport; |
c19e6535 | 1992 | int err; |
44e05eca | 1993 | |
df2c07f4 | 1994 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1995 | if (err) |
c19e6535 BP |
1996 | goto exit; |
1997 | ||
1998 | rtnl_lock(); | |
2a4999f3 | 1999 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
2000 | err = PTR_ERR(vport); |
2001 | if (IS_ERR(vport)) | |
f0fef760 | 2002 | goto exit_unlock; |
44e05eca | 2003 | |
c19e6535 | 2004 | err = 0; |
6455100f | 2005 | if (a[OVS_VPORT_ATTR_TYPE] && |
16b82e84 | 2006 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) |
4879d4c7 | 2007 | err = -EINVAL; |
6455100f | 2008 | |
c25ea534 JG |
2009 | reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
2010 | if (!reply) { | |
2011 | err = -ENOMEM; | |
2012 | goto exit_unlock; | |
2013 | } | |
2014 | ||
4879d4c7 | 2015 | if (!err && a[OVS_VPORT_ATTR_OPTIONS]) |
850b6b3b | 2016 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
1fc7083d | 2017 | if (err) |
c25ea534 | 2018 | goto exit_free; |
1fc7083d JG |
2019 | |
2020 | if (a[OVS_VPORT_ATTR_STATS]) | |
2021 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
2022 | ||
2023 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) | |
28aea917 | 2024 | vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 | 2025 | |
c25ea534 JG |
2026 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2027 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2028 | BUG_ON(err < 0); | |
f0fef760 | 2029 | |
28aea917 | 2030 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b | 2031 | ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); |
f0fef760 | 2032 | |
c25ea534 JG |
2033 | rtnl_unlock(); |
2034 | return 0; | |
2035 | ||
2036 | exit_free: | |
2037 | kfree_skb(reply); | |
f0fef760 | 2038 | exit_unlock: |
c19e6535 BP |
2039 | rtnl_unlock(); |
2040 | exit: | |
2041 | return err; | |
064af421 BP |
2042 | } |
2043 | ||
df2c07f4 | 2044 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2045 | { |
f0fef760 BP |
2046 | struct nlattr **a = info->attrs; |
2047 | struct sk_buff *reply; | |
c19e6535 | 2048 | struct vport *vport; |
c19e6535 BP |
2049 | int err; |
2050 | ||
df2c07f4 | 2051 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 2052 | if (err) |
c19e6535 BP |
2053 | goto exit; |
2054 | ||
2055 | rtnl_lock(); | |
2a4999f3 | 2056 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 2057 | err = PTR_ERR(vport); |
f0fef760 BP |
2058 | if (IS_ERR(vport)) |
2059 | goto exit_unlock; | |
c19e6535 | 2060 | |
df2c07f4 | 2061 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
2062 | err = -EINVAL; |
2063 | goto exit_unlock; | |
2064 | } | |
2065 | ||
28aea917 IY |
2066 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2067 | info->snd_seq, OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
2068 | err = PTR_ERR(reply); |
2069 | if (IS_ERR(reply)) | |
2070 | goto exit_unlock; | |
2071 | ||
b57d5819 | 2072 | err = 0; |
850b6b3b | 2073 | ovs_dp_detach_port(vport); |
f0fef760 | 2074 | |
28aea917 | 2075 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b | 2076 | ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); |
f0fef760 BP |
2077 | |
2078 | exit_unlock: | |
c19e6535 BP |
2079 | rtnl_unlock(); |
2080 | exit: | |
2081 | return err; | |
7c40efc9 BP |
2082 | } |
2083 | ||
df2c07f4 | 2084 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2085 | { |
f0fef760 | 2086 | struct nlattr **a = info->attrs; |
df2c07f4 | 2087 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 2088 | struct sk_buff *reply; |
c19e6535 | 2089 | struct vport *vport; |
c19e6535 BP |
2090 | int err; |
2091 | ||
df2c07f4 | 2092 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
2093 | if (err) |
2094 | goto exit; | |
c19e6535 | 2095 | |
ed099e92 | 2096 | rcu_read_lock(); |
2a4999f3 | 2097 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2098 | err = PTR_ERR(vport); |
2099 | if (IS_ERR(vport)) | |
f0fef760 | 2100 | goto exit_unlock; |
c19e6535 | 2101 | |
28aea917 IY |
2102 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2103 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
2104 | err = PTR_ERR(reply); |
2105 | if (IS_ERR(reply)) | |
f0fef760 | 2106 | goto exit_unlock; |
ed099e92 | 2107 | |
df2fa9b5 JG |
2108 | rcu_read_unlock(); |
2109 | ||
2110 | return genlmsg_reply(reply, info); | |
ed099e92 | 2111 | |
f0fef760 | 2112 | exit_unlock: |
ed099e92 | 2113 | rcu_read_unlock(); |
f0fef760 | 2114 | exit: |
c19e6535 BP |
2115 | return err; |
2116 | } | |
2117 | ||
df2c07f4 | 2118 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2119 | { |
df2c07f4 | 2120 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2121 | struct datapath *dp; |
95b1d73a PS |
2122 | int bucket = cb->args[0], skip = cb->args[1]; |
2123 | int i, j = 0; | |
c19e6535 | 2124 | |
2a4999f3 | 2125 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 | 2126 | if (!dp) |
f0fef760 | 2127 | return -ENODEV; |
ed099e92 BP |
2128 | |
2129 | rcu_read_lock(); | |
95b1d73a | 2130 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2131 | struct vport *vport; |
95b1d73a PS |
2132 | |
2133 | j = 0; | |
f8dfbcb7 | 2134 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2135 | if (j >= skip && |
2136 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 2137 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2138 | cb->nlh->nlmsg_seq, |
2139 | NLM_F_MULTI, | |
2140 | OVS_VPORT_CMD_NEW) < 0) | |
2141 | goto out; | |
2142 | ||
2143 | j++; | |
2144 | } | |
2145 | skip = 0; | |
c19e6535 | 2146 | } |
95b1d73a | 2147 | out: |
ed099e92 | 2148 | rcu_read_unlock(); |
c19e6535 | 2149 | |
95b1d73a PS |
2150 | cb->args[0] = i; |
2151 | cb->args[1] = j; | |
f0fef760 | 2152 | |
95b1d73a | 2153 | return skb->len; |
7c40efc9 BP |
2154 | } |
2155 | ||
f0fef760 | 2156 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2157 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
2158 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2159 | .policy = vport_policy, | |
df2c07f4 | 2160 | .doit = ovs_vport_cmd_new |
f0fef760 | 2161 | }, |
df2c07f4 | 2162 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
2163 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2164 | .policy = vport_policy, | |
df2c07f4 | 2165 | .doit = ovs_vport_cmd_del |
f0fef760 | 2166 | }, |
df2c07f4 | 2167 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2168 | .flags = 0, /* OK for unprivileged users. */ |
2169 | .policy = vport_policy, | |
df2c07f4 JP |
2170 | .doit = ovs_vport_cmd_get, |
2171 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2172 | }, |
df2c07f4 | 2173 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
2174 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2175 | .policy = vport_policy, | |
df2c07f4 | 2176 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2177 | }, |
2178 | }; | |
2179 | ||
982b8810 BP |
2180 | struct genl_family_and_ops { |
2181 | struct genl_family *family; | |
2182 | struct genl_ops *ops; | |
2183 | int n_ops; | |
2184 | struct genl_multicast_group *group; | |
2185 | }; | |
ed099e92 | 2186 | |
982b8810 | 2187 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
2188 | { &dp_datapath_genl_family, |
2189 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
850b6b3b | 2190 | &ovs_dp_datapath_multicast_group }, |
f0fef760 BP |
2191 | { &dp_vport_genl_family, |
2192 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
850b6b3b | 2193 | &ovs_dp_vport_multicast_group }, |
37a1300c BP |
2194 | { &dp_flow_genl_family, |
2195 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
850b6b3b | 2196 | &ovs_dp_flow_multicast_group }, |
982b8810 BP |
2197 | { &dp_packet_genl_family, |
2198 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
2199 | NULL }, | |
2200 | }; | |
ed099e92 | 2201 | |
982b8810 BP |
2202 | static void dp_unregister_genl(int n_families) |
2203 | { | |
2204 | int i; | |
ed099e92 | 2205 | |
b867ca75 | 2206 | for (i = 0; i < n_families; i++) |
982b8810 | 2207 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
2208 | } |
2209 | ||
982b8810 | 2210 | static int dp_register_genl(void) |
064af421 | 2211 | { |
982b8810 BP |
2212 | int n_registered; |
2213 | int err; | |
2214 | int i; | |
064af421 | 2215 | |
982b8810 BP |
2216 | n_registered = 0; |
2217 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2218 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 2219 | |
982b8810 BP |
2220 | err = genl_register_family_with_ops(f->family, f->ops, |
2221 | f->n_ops); | |
2222 | if (err) | |
2223 | goto error; | |
2224 | n_registered++; | |
e22d4953 | 2225 | |
982b8810 BP |
2226 | if (f->group) { |
2227 | err = genl_register_mc_group(f->family, f->group); | |
2228 | if (err) | |
2229 | goto error; | |
2230 | } | |
2231 | } | |
9cc8b4e4 | 2232 | |
982b8810 | 2233 | return 0; |
064af421 BP |
2234 | |
2235 | error: | |
982b8810 BP |
2236 | dp_unregister_genl(n_registered); |
2237 | return err; | |
064af421 BP |
2238 | } |
2239 | ||
acd051f1 PS |
2240 | static int __rehash_flow_table(void *dummy) |
2241 | { | |
2242 | struct datapath *dp; | |
2a4999f3 PS |
2243 | struct net *net; |
2244 | ||
2245 | rtnl_lock(); | |
2246 | for_each_net(net) { | |
2247 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
acd051f1 | 2248 | |
2a4999f3 PS |
2249 | list_for_each_entry(dp, &ovs_net->dps, list_node) { |
2250 | struct flow_table *old_table = genl_dereference(dp->table); | |
2251 | struct flow_table *new_table; | |
acd051f1 | 2252 | |
2a4999f3 PS |
2253 | new_table = ovs_flow_tbl_rehash(old_table); |
2254 | if (!IS_ERR(new_table)) { | |
2255 | rcu_assign_pointer(dp->table, new_table); | |
2256 | ovs_flow_tbl_deferred_destroy(old_table); | |
2257 | } | |
acd051f1 PS |
2258 | } |
2259 | } | |
2a4999f3 | 2260 | rtnl_unlock(); |
acd051f1 PS |
2261 | return 0; |
2262 | } | |
2263 | ||
2264 | static void rehash_flow_table(struct work_struct *work) | |
2265 | { | |
2266 | genl_exec(__rehash_flow_table, NULL); | |
2267 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); | |
2268 | } | |
2269 | ||
2a4999f3 PS |
2270 | static int dp_destroy_all(void *data) |
2271 | { | |
2272 | struct datapath *dp, *dp_next; | |
2273 | struct ovs_net *ovs_net = data; | |
2274 | ||
2275 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2276 | __dp_destroy(dp); | |
2277 | ||
2278 | return 0; | |
2279 | } | |
2280 | ||
2281 | static int __net_init ovs_init_net(struct net *net) | |
2282 | { | |
2283 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2284 | ||
2285 | INIT_LIST_HEAD(&ovs_net->dps); | |
2286 | return 0; | |
2287 | } | |
2288 | ||
2289 | static void __net_exit ovs_exit_net(struct net *net) | |
2290 | { | |
2291 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2292 | ||
2293 | genl_exec(dp_destroy_all, ovs_net); | |
2294 | } | |
2295 | ||
2296 | static struct pernet_operations ovs_net_ops = { | |
2297 | .init = ovs_init_net, | |
2298 | .exit = ovs_exit_net, | |
2299 | .id = &ovs_net_id, | |
2300 | .size = sizeof(struct ovs_net), | |
2301 | }; | |
2302 | ||
22d24ebf BP |
2303 | static int __init dp_init(void) |
2304 | { | |
2305 | int err; | |
2306 | ||
f3d85db3 | 2307 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2308 | |
dc5f3fef | 2309 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 2310 | VERSION); |
064af421 | 2311 | |
b9c15df9 | 2312 | err = genl_exec_init(); |
064af421 BP |
2313 | if (err) |
2314 | goto error; | |
2315 | ||
16d650e5 | 2316 | err = ovs_workqueues_init(); |
b9c15df9 PS |
2317 | if (err) |
2318 | goto error_genl_exec; | |
2319 | ||
850b6b3b | 2320 | err = ovs_flow_init(); |
3544358a | 2321 | if (err) |
85c9de19 | 2322 | goto error_wq; |
3544358a | 2323 | |
850b6b3b | 2324 | err = ovs_vport_init(); |
064af421 BP |
2325 | if (err) |
2326 | goto error_flow_exit; | |
2327 | ||
2a4999f3 | 2328 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2329 | if (err) |
2330 | goto error_vport_exit; | |
2331 | ||
2a4999f3 PS |
2332 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2333 | if (err) | |
2334 | goto error_netns_exit; | |
2335 | ||
982b8810 BP |
2336 | err = dp_register_genl(); |
2337 | if (err < 0) | |
37a1300c | 2338 | goto error_unreg_notifier; |
982b8810 | 2339 | |
acd051f1 PS |
2340 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); |
2341 | ||
064af421 BP |
2342 | return 0; |
2343 | ||
2344 | error_unreg_notifier: | |
850b6b3b | 2345 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2346 | error_netns_exit: |
2347 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2348 | error_vport_exit: |
850b6b3b | 2349 | ovs_vport_exit(); |
064af421 | 2350 | error_flow_exit: |
850b6b3b | 2351 | ovs_flow_exit(); |
16d650e5 PS |
2352 | error_wq: |
2353 | ovs_workqueues_exit(); | |
b9c15df9 PS |
2354 | error_genl_exec: |
2355 | genl_exec_exit(); | |
064af421 BP |
2356 | error: |
2357 | return err; | |
2358 | } | |
2359 | ||
2360 | static void dp_cleanup(void) | |
2361 | { | |
acd051f1 | 2362 | cancel_delayed_work_sync(&rehash_flow_wq); |
982b8810 | 2363 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
850b6b3b | 2364 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2365 | unregister_pernet_device(&ovs_net_ops); |
2366 | rcu_barrier(); | |
850b6b3b JG |
2367 | ovs_vport_exit(); |
2368 | ovs_flow_exit(); | |
16d650e5 | 2369 | ovs_workqueues_exit(); |
b9c15df9 | 2370 | genl_exec_exit(); |
064af421 BP |
2371 | } |
2372 | ||
2373 | module_init(dp_init); | |
2374 | module_exit(dp_cleanup); | |
2375 | ||
2376 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2377 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2378 | MODULE_VERSION(VERSION); |