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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; | |
161 | struct hlist_node *n; | |
162 | struct hlist_head *head; | |
163 | ||
164 | head = vport_hash_bucket(dp, port_no); | |
165 | hlist_for_each_entry_rcu(vport, n, head, dp_hash_node) { | |
166 | if (vport->port_no == port_no) | |
167 | return vport; | |
168 | } | |
169 | return NULL; | |
170 | } | |
171 | ||
ed099e92 | 172 | /* Called with RTNL lock and genl_lock. */ |
c19e6535 | 173 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 174 | { |
f2459fe7 | 175 | struct vport *vport; |
f2459fe7 | 176 | |
850b6b3b | 177 | vport = ovs_vport_add(parms); |
c19e6535 BP |
178 | if (!IS_ERR(vport)) { |
179 | struct datapath *dp = parms->dp; | |
95b1d73a | 180 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 181 | |
95b1d73a | 182 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 183 | } |
c19e6535 | 184 | return vport; |
064af421 BP |
185 | } |
186 | ||
ed099e92 | 187 | /* Called with RTNL lock. */ |
850b6b3b | 188 | void ovs_dp_detach_port(struct vport *p) |
064af421 BP |
189 | { |
190 | ASSERT_RTNL(); | |
191 | ||
064af421 | 192 | /* First drop references to device. */ |
95b1d73a | 193 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 194 | |
7237e4f4 | 195 | /* Then destroy it. */ |
850b6b3b | 196 | ovs_vport_del(p); |
064af421 BP |
197 | } |
198 | ||
8819fac7 | 199 | /* Must be called with rcu_read_lock. */ |
850b6b3b | 200 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
201 | { |
202 | struct datapath *dp = p->dp; | |
3544358a | 203 | struct sw_flow *flow; |
064af421 | 204 | struct dp_stats_percpu *stats; |
e9141eec | 205 | u64 *stats_counter; |
4c1ad233 | 206 | int error; |
064af421 | 207 | |
70dbc259 | 208 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 209 | |
3976f6d5 | 210 | if (!OVS_CB(skb)->flow) { |
36956a7d | 211 | struct sw_flow_key key; |
76abe283 | 212 | int key_len; |
4c1ad233 | 213 | |
3976f6d5 | 214 | /* Extract flow from 'skb' into 'key'. */ |
850b6b3b | 215 | error = ovs_flow_extract(skb, p->port_no, &key, &key_len); |
3976f6d5 JG |
216 | if (unlikely(error)) { |
217 | kfree_skb(skb); | |
218 | return; | |
219 | } | |
064af421 | 220 | |
3976f6d5 | 221 | /* Look up flow. */ |
850b6b3b JG |
222 | flow = ovs_flow_tbl_lookup(rcu_dereference(dp->table), |
223 | &key, key_len); | |
3544358a | 224 | if (unlikely(!flow)) { |
856081f6 BP |
225 | struct dp_upcall_info upcall; |
226 | ||
df2c07f4 | 227 | upcall.cmd = OVS_PACKET_CMD_MISS; |
856081f6 | 228 | upcall.key = &key; |
98403001 | 229 | upcall.userdata = NULL; |
28aea917 | 230 | upcall.portid = p->upcall_portid; |
850b6b3b | 231 | ovs_dp_upcall(dp, skb, &upcall); |
d9e214da | 232 | consume_skb(skb); |
e9141eec | 233 | stats_counter = &stats->n_missed; |
3976f6d5 JG |
234 | goto out; |
235 | } | |
236 | ||
3544358a | 237 | OVS_CB(skb)->flow = flow; |
55574bb0 BP |
238 | } |
239 | ||
e9141eec | 240 | stats_counter = &stats->n_hit; |
850b6b3b JG |
241 | ovs_flow_used(OVS_CB(skb)->flow, skb); |
242 | ovs_execute_actions(dp, skb); | |
55574bb0 | 243 | |
8819fac7 | 244 | out: |
55574bb0 | 245 | /* Update datapath statistics. */ |
821cb9fa | 246 | u64_stats_update_begin(&stats->sync); |
e9141eec | 247 | (*stats_counter)++; |
821cb9fa | 248 | u64_stats_update_end(&stats->sync); |
064af421 BP |
249 | } |
250 | ||
aa5a8fdc JG |
251 | static struct genl_family dp_packet_genl_family = { |
252 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
253 | .hdrsize = sizeof(struct ovs_header), |
254 | .name = OVS_PACKET_FAMILY, | |
69685a88 | 255 | .version = OVS_PACKET_VERSION, |
2a4999f3 PS |
256 | .maxattr = OVS_PACKET_ATTR_MAX, |
257 | SET_NETNSOK | |
aa5a8fdc JG |
258 | }; |
259 | ||
850b6b3b JG |
260 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
261 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc JG |
262 | { |
263 | struct dp_stats_percpu *stats; | |
7257b535 | 264 | int dp_ifindex; |
aa5a8fdc JG |
265 | int err; |
266 | ||
28aea917 | 267 | if (upcall_info->portid == 0) { |
b063d9f0 | 268 | err = -ENOTCONN; |
b063d9f0 JG |
269 | goto err; |
270 | } | |
271 | ||
7257b535 BP |
272 | dp_ifindex = get_dpifindex(dp); |
273 | if (!dp_ifindex) { | |
274 | err = -ENODEV; | |
275 | goto err; | |
aa5a8fdc JG |
276 | } |
277 | ||
7257b535 | 278 | forward_ip_summed(skb, true); |
36ce148c | 279 | |
7257b535 | 280 | if (!skb_is_gso(skb)) |
2a4999f3 | 281 | err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
7257b535 | 282 | else |
2a4999f3 | 283 | err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
d76195db JG |
284 | if (err) |
285 | goto err; | |
286 | ||
287 | return 0; | |
aa5a8fdc | 288 | |
aa5a8fdc | 289 | err: |
70dbc259 | 290 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 291 | |
821cb9fa | 292 | u64_stats_update_begin(&stats->sync); |
aa5a8fdc | 293 | stats->n_lost++; |
821cb9fa | 294 | u64_stats_update_end(&stats->sync); |
aa5a8fdc | 295 | |
aa5a8fdc | 296 | return err; |
982b8810 BP |
297 | } |
298 | ||
2a4999f3 PS |
299 | static int queue_gso_packets(struct net *net, int dp_ifindex, |
300 | struct sk_buff *skb, | |
7257b535 | 301 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 302 | { |
d4cba1f8 | 303 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
304 | struct dp_upcall_info later_info; |
305 | struct sw_flow_key later_key; | |
306 | struct sk_buff *segs, *nskb; | |
307 | int err; | |
cb5087ca | 308 | |
7257b535 | 309 | segs = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM); |
79089764 PS |
310 | if (IS_ERR(segs)) |
311 | return PTR_ERR(segs); | |
99769a40 | 312 | |
7257b535 BP |
313 | /* Queue all of the segments. */ |
314 | skb = segs; | |
cb5087ca | 315 | do { |
2a4999f3 | 316 | err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info); |
982b8810 | 317 | if (err) |
7257b535 | 318 | break; |
856081f6 | 319 | |
d4cba1f8 | 320 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
e1cf87ff JG |
321 | /* The initial flow key extracted by ovs_flow_extract() |
322 | * in this case is for a first fragment, so we need to | |
7257b535 BP |
323 | * properly mark later fragments. |
324 | */ | |
325 | later_key = *upcall_info->key; | |
9e44d715 | 326 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
7257b535 BP |
327 | |
328 | later_info = *upcall_info; | |
329 | later_info.key = &later_key; | |
330 | upcall_info = &later_info; | |
331 | } | |
36ce148c | 332 | } while ((skb = skb->next)); |
cb5087ca | 333 | |
7257b535 BP |
334 | /* Free all of the segments. */ |
335 | skb = segs; | |
336 | do { | |
337 | nskb = skb->next; | |
338 | if (err) | |
339 | kfree_skb(skb); | |
340 | else | |
341 | consume_skb(skb); | |
342 | } while ((skb = nskb)); | |
343 | return err; | |
344 | } | |
345 | ||
2a4999f3 PS |
346 | static int queue_userspace_packet(struct net *net, int dp_ifindex, |
347 | struct sk_buff *skb, | |
7257b535 BP |
348 | const struct dp_upcall_info *upcall_info) |
349 | { | |
350 | struct ovs_header *upcall; | |
6161d3fd | 351 | struct sk_buff *nskb = NULL; |
7257b535 BP |
352 | struct sk_buff *user_skb; /* to be queued to userspace */ |
353 | struct nlattr *nla; | |
354 | unsigned int len; | |
355 | int err; | |
356 | ||
6161d3fd JG |
357 | if (vlan_tx_tag_present(skb)) { |
358 | nskb = skb_clone(skb, GFP_ATOMIC); | |
359 | if (!nskb) | |
360 | return -ENOMEM; | |
361 | ||
362 | err = vlan_deaccel_tag(nskb); | |
363 | if (err) | |
364 | return err; | |
7257b535 | 365 | |
6161d3fd JG |
366 | skb = nskb; |
367 | } | |
368 | ||
369 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
370 | err = -EFBIG; | |
371 | goto out; | |
372 | } | |
7257b535 BP |
373 | |
374 | len = sizeof(struct ovs_header); | |
375 | len += nla_total_size(skb->len); | |
376 | len += nla_total_size(FLOW_BUFSIZE); | |
377 | if (upcall_info->cmd == OVS_PACKET_CMD_ACTION) | |
378 | len += nla_total_size(8); | |
379 | ||
380 | user_skb = genlmsg_new(len, GFP_ATOMIC); | |
6161d3fd JG |
381 | if (!user_skb) { |
382 | err = -ENOMEM; | |
383 | goto out; | |
384 | } | |
7257b535 BP |
385 | |
386 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
387 | 0, upcall_info->cmd); | |
388 | upcall->dp_ifindex = dp_ifindex; | |
389 | ||
390 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
850b6b3b | 391 | ovs_flow_to_nlattrs(upcall_info->key, user_skb); |
7257b535 BP |
392 | nla_nest_end(user_skb, nla); |
393 | ||
394 | if (upcall_info->userdata) | |
395 | nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA, | |
396 | nla_get_u64(upcall_info->userdata)); | |
397 | ||
398 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); | |
bed53bd1 PS |
399 | |
400 | skb_copy_and_csum_dev(skb, nla_data(nla)); | |
7257b535 | 401 | |
28aea917 | 402 | err = genlmsg_unicast(net, user_skb, upcall_info->portid); |
6161d3fd JG |
403 | |
404 | out: | |
405 | kfree_skb(nskb); | |
406 | return err; | |
cb5087ca BP |
407 | } |
408 | ||
ed099e92 | 409 | /* Called with genl_mutex. */ |
2a4999f3 | 410 | static int flush_flows(struct datapath *dp) |
064af421 | 411 | { |
3544358a PS |
412 | struct flow_table *old_table; |
413 | struct flow_table *new_table; | |
8d5ebd83 | 414 | |
20d035b2 | 415 | old_table = genl_dereference(dp->table); |
850b6b3b | 416 | new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS); |
8d5ebd83 | 417 | if (!new_table) |
ed099e92 | 418 | return -ENOMEM; |
8d5ebd83 JG |
419 | |
420 | rcu_assign_pointer(dp->table, new_table); | |
421 | ||
850b6b3b | 422 | ovs_flow_tbl_deferred_destroy(old_table); |
ed099e92 | 423 | return 0; |
064af421 BP |
424 | } |
425 | ||
9b405f1a PS |
426 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, int attr_len) |
427 | { | |
428 | ||
429 | struct sw_flow_actions *acts; | |
430 | int new_acts_size; | |
431 | int req_size = NLA_ALIGN(attr_len); | |
432 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
433 | (*sfa)->actions_len; | |
434 | ||
435 | if (req_size <= (ksize(*sfa) - next_offset)) | |
436 | goto out; | |
437 | ||
438 | new_acts_size = ksize(*sfa) * 2; | |
439 | ||
440 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
441 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
442 | return ERR_PTR(-EMSGSIZE); | |
443 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
444 | } | |
445 | ||
446 | acts = ovs_flow_actions_alloc(new_acts_size); | |
447 | if (IS_ERR(acts)) | |
448 | return (void *)acts; | |
449 | ||
450 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
451 | acts->actions_len = (*sfa)->actions_len; | |
452 | kfree(*sfa); | |
453 | *sfa = acts; | |
454 | ||
455 | out: | |
456 | (*sfa)->actions_len += req_size; | |
457 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
458 | } | |
459 | ||
460 | static int add_action(struct sw_flow_actions **sfa, int attrtype, void *data, int len) | |
461 | { | |
462 | struct nlattr *a; | |
463 | ||
464 | a = reserve_sfa_size(sfa, nla_attr_size(len)); | |
465 | if (IS_ERR(a)) | |
466 | return PTR_ERR(a); | |
467 | ||
468 | a->nla_type = attrtype; | |
469 | a->nla_len = nla_attr_size(len); | |
470 | ||
471 | if (data) | |
472 | memcpy(nla_data(a), data, len); | |
473 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
6ff686f2 | 474 | |
9b405f1a PS |
475 | return 0; |
476 | } | |
477 | ||
478 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, int attrtype) | |
479 | { | |
480 | int used = (*sfa)->actions_len; | |
481 | int err; | |
482 | ||
483 | err = add_action(sfa, attrtype, NULL, 0); | |
484 | if (err) | |
485 | return err; | |
486 | ||
487 | return used; | |
488 | } | |
489 | ||
490 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, int st_offset) | |
491 | { | |
492 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + st_offset); | |
493 | ||
494 | a->nla_len = sfa->actions_len - st_offset; | |
495 | } | |
496 | ||
497 | static int validate_and_copy_actions(const struct nlattr *attr, | |
498 | const struct sw_flow_key *key, int depth, | |
499 | struct sw_flow_actions **sfa); | |
500 | ||
501 | static int validate_and_copy_sample(const struct nlattr *attr, | |
502 | const struct sw_flow_key *key, int depth, | |
503 | struct sw_flow_actions **sfa) | |
6ff686f2 | 504 | { |
4be00e48 BP |
505 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; |
506 | const struct nlattr *probability, *actions; | |
507 | const struct nlattr *a; | |
9b405f1a | 508 | int rem, start, err, st_acts; |
4be00e48 BP |
509 | |
510 | memset(attrs, 0, sizeof(attrs)); | |
6455100f | 511 | nla_for_each_nested(a, attr, rem) { |
4be00e48 BP |
512 | int type = nla_type(a); |
513 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
514 | return -EINVAL; | |
515 | attrs[type] = a; | |
516 | } | |
517 | if (rem) | |
6ff686f2 | 518 | return -EINVAL; |
4be00e48 BP |
519 | |
520 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
521 | if (!probability || nla_len(probability) != sizeof(u32)) | |
6ff686f2 PS |
522 | return -EINVAL; |
523 | ||
4be00e48 BP |
524 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; |
525 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
526 | return -EINVAL; | |
9b405f1a PS |
527 | |
528 | /* validation done, copy sample action. */ | |
529 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE); | |
530 | if (start < 0) | |
531 | return start; | |
532 | err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, nla_data(probability), sizeof(u32)); | |
533 | if (err) | |
534 | return err; | |
535 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS); | |
536 | if (st_acts < 0) | |
537 | return st_acts; | |
538 | ||
539 | err = validate_and_copy_actions(actions, key, depth + 1, sfa); | |
540 | if (err) | |
541 | return err; | |
542 | ||
543 | add_nested_action_end(*sfa, st_acts); | |
544 | add_nested_action_end(*sfa, start); | |
545 | ||
546 | return 0; | |
4edb9ae9 PS |
547 | } |
548 | ||
b1323f59 PS |
549 | static int validate_tp_port(const struct sw_flow_key *flow_key) |
550 | { | |
551 | if (flow_key->eth.type == htons(ETH_P_IP)) { | |
6e9bea4d | 552 | if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst) |
b1323f59 PS |
553 | return 0; |
554 | } else if (flow_key->eth.type == htons(ETH_P_IPV6)) { | |
6e9bea4d | 555 | if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst) |
b1323f59 PS |
556 | return 0; |
557 | } | |
558 | ||
559 | return -EINVAL; | |
560 | } | |
561 | ||
9b405f1a PS |
562 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
563 | struct sw_flow_actions **sfa) | |
564 | { | |
565 | struct ovs_key_ipv4_tunnel tun_key; | |
566 | int err, start; | |
567 | ||
568 | err = ipv4_tun_from_nlattr(nla_data(attr), &tun_key); | |
569 | if (err) | |
570 | return err; | |
571 | ||
572 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET); | |
573 | if (start < 0) | |
574 | return start; | |
575 | ||
576 | err = add_action(sfa, OVS_KEY_ATTR_IPV4_TUNNEL, &tun_key, sizeof(tun_key)); | |
577 | add_nested_action_end(*sfa, start); | |
578 | ||
579 | return err; | |
580 | } | |
581 | ||
fea393b1 | 582 | static int validate_set(const struct nlattr *a, |
9b405f1a PS |
583 | const struct sw_flow_key *flow_key, |
584 | struct sw_flow_actions **sfa, | |
585 | bool *set_tun) | |
4edb9ae9 | 586 | { |
4edb9ae9 PS |
587 | const struct nlattr *ovs_key = nla_data(a); |
588 | int key_type = nla_type(ovs_key); | |
589 | ||
590 | /* There can be only one key in a action */ | |
591 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
592 | return -EINVAL; | |
593 | ||
594 | if (key_type > OVS_KEY_ATTR_MAX || | |
9b405f1a PS |
595 | (ovs_key_lens[key_type] != nla_len(ovs_key) && |
596 | ovs_key_lens[key_type] != -1)) | |
4edb9ae9 PS |
597 | return -EINVAL; |
598 | ||
fea393b1 | 599 | switch (key_type) { |
4edb9ae9 | 600 | const struct ovs_key_ipv4 *ipv4_key; |
bc7a5acd | 601 | const struct ovs_key_ipv6 *ipv6_key; |
9b405f1a | 602 | int err; |
4edb9ae9 | 603 | |
fea393b1 BP |
604 | case OVS_KEY_ATTR_PRIORITY: |
605 | case OVS_KEY_ATTR_TUN_ID: | |
606 | case OVS_KEY_ATTR_ETHERNET: | |
4edb9ae9 PS |
607 | break; |
608 | ||
72e8bf28 AA |
609 | case OVS_KEY_ATTR_SKB_MARK: |
610 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER) | |
611 | if (nla_get_u32(ovs_key) != 0) | |
612 | return -EINVAL; | |
613 | #endif | |
614 | break; | |
615 | ||
9b405f1a PS |
616 | case OVS_KEY_ATTR_TUNNEL: |
617 | *set_tun = true; | |
618 | err = validate_and_copy_set_tun(a, sfa); | |
619 | if (err) | |
620 | return err; | |
356af50b KM |
621 | break; |
622 | ||
fea393b1 | 623 | case OVS_KEY_ATTR_IPV4: |
4edb9ae9 PS |
624 | if (flow_key->eth.type != htons(ETH_P_IP)) |
625 | return -EINVAL; | |
626 | ||
6e9bea4d | 627 | if (!flow_key->ip.proto) |
4edb9ae9 PS |
628 | return -EINVAL; |
629 | ||
630 | ipv4_key = nla_data(ovs_key); | |
631 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
632 | return -EINVAL; | |
633 | ||
9e44d715 | 634 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) |
7257b535 BP |
635 | return -EINVAL; |
636 | ||
4edb9ae9 PS |
637 | break; |
638 | ||
bc7a5acd AA |
639 | case OVS_KEY_ATTR_IPV6: |
640 | if (flow_key->eth.type != htons(ETH_P_IPV6)) | |
641 | return -EINVAL; | |
642 | ||
643 | if (!flow_key->ip.proto) | |
644 | return -EINVAL; | |
645 | ||
646 | ipv6_key = nla_data(ovs_key); | |
647 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
648 | return -EINVAL; | |
649 | ||
650 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) | |
651 | return -EINVAL; | |
652 | ||
653 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) | |
654 | return -EINVAL; | |
655 | ||
656 | break; | |
657 | ||
fea393b1 | 658 | case OVS_KEY_ATTR_TCP: |
4edb9ae9 PS |
659 | if (flow_key->ip.proto != IPPROTO_TCP) |
660 | return -EINVAL; | |
661 | ||
b1323f59 | 662 | return validate_tp_port(flow_key); |
4edb9ae9 | 663 | |
fea393b1 | 664 | case OVS_KEY_ATTR_UDP: |
4edb9ae9 PS |
665 | if (flow_key->ip.proto != IPPROTO_UDP) |
666 | return -EINVAL; | |
667 | ||
b1323f59 | 668 | return validate_tp_port(flow_key); |
4edb9ae9 PS |
669 | |
670 | default: | |
671 | return -EINVAL; | |
672 | } | |
fea393b1 | 673 | |
4edb9ae9 | 674 | return 0; |
6ff686f2 PS |
675 | } |
676 | ||
98403001 BP |
677 | static int validate_userspace(const struct nlattr *attr) |
678 | { | |
6455100f | 679 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { |
98403001 BP |
680 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, |
681 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_U64 }, | |
682 | }; | |
683 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
684 | int error; | |
685 | ||
6455100f PS |
686 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, |
687 | attr, userspace_policy); | |
98403001 BP |
688 | if (error) |
689 | return error; | |
690 | ||
6455100f PS |
691 | if (!a[OVS_USERSPACE_ATTR_PID] || |
692 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
98403001 BP |
693 | return -EINVAL; |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
9b405f1a PS |
698 | static int copy_action(const struct nlattr *from, |
699 | struct sw_flow_actions **sfa) | |
700 | { | |
701 | int totlen = NLA_ALIGN(from->nla_len); | |
702 | struct nlattr *to; | |
703 | ||
704 | to = reserve_sfa_size(sfa, from->nla_len); | |
705 | if (IS_ERR(to)) | |
706 | return PTR_ERR(to); | |
707 | ||
708 | memcpy(to, from, totlen); | |
709 | return 0; | |
710 | } | |
711 | ||
712 | static int validate_and_copy_actions(const struct nlattr *attr, | |
713 | const struct sw_flow_key *key, | |
714 | int depth, | |
715 | struct sw_flow_actions **sfa) | |
064af421 | 716 | { |
23cad98c | 717 | const struct nlattr *a; |
6ff686f2 PS |
718 | int rem, err; |
719 | ||
720 | if (depth >= SAMPLE_ACTION_DEPTH) | |
721 | return -EOVERFLOW; | |
23cad98c | 722 | |
37a1300c | 723 | nla_for_each_nested(a, attr, rem) { |
98403001 | 724 | /* Expected argument lengths, (u32)-1 for variable length. */ |
df2c07f4 | 725 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
fea393b1 | 726 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), |
98403001 | 727 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
fea393b1 BP |
728 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
729 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
4edb9ae9 | 730 | [OVS_ACTION_ATTR_SET] = (u32)-1, |
98403001 | 731 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1 |
23cad98c | 732 | }; |
fea393b1 | 733 | const struct ovs_action_push_vlan *vlan; |
23cad98c | 734 | int type = nla_type(a); |
9b405f1a | 735 | bool skip_copy; |
23cad98c | 736 | |
6ff686f2 | 737 | if (type > OVS_ACTION_ATTR_MAX || |
98403001 BP |
738 | (action_lens[type] != nla_len(a) && |
739 | action_lens[type] != (u32)-1)) | |
23cad98c BP |
740 | return -EINVAL; |
741 | ||
9b405f1a | 742 | skip_copy = false; |
23cad98c | 743 | switch (type) { |
df2c07f4 | 744 | case OVS_ACTION_ATTR_UNSPEC: |
cdee00fd | 745 | return -EINVAL; |
064af421 | 746 | |
98403001 BP |
747 | case OVS_ACTION_ATTR_USERSPACE: |
748 | err = validate_userspace(a); | |
749 | if (err) | |
750 | return err; | |
751 | break; | |
752 | ||
df2c07f4 | 753 | case OVS_ACTION_ATTR_OUTPUT: |
23cad98c BP |
754 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
755 | return -EINVAL; | |
3b1fc5f3 | 756 | break; |
cdee00fd | 757 | |
4edb9ae9 | 758 | |
fea393b1 BP |
759 | case OVS_ACTION_ATTR_POP_VLAN: |
760 | break; | |
761 | ||
762 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
763 | vlan = nla_data(a); | |
764 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
765 | return -EINVAL; | |
8ddc056d | 766 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) |
064af421 | 767 | return -EINVAL; |
23cad98c | 768 | break; |
064af421 | 769 | |
4edb9ae9 | 770 | case OVS_ACTION_ATTR_SET: |
9b405f1a | 771 | err = validate_set(a, key, sfa, &skip_copy); |
4edb9ae9 PS |
772 | if (err) |
773 | return err; | |
23cad98c | 774 | break; |
064af421 | 775 | |
6ff686f2 | 776 | case OVS_ACTION_ATTR_SAMPLE: |
9b405f1a | 777 | err = validate_and_copy_sample(a, key, depth, sfa); |
6ff686f2 PS |
778 | if (err) |
779 | return err; | |
9b405f1a | 780 | skip_copy = true; |
6ff686f2 PS |
781 | break; |
782 | ||
23cad98c | 783 | default: |
4edb9ae9 | 784 | return -EINVAL; |
23cad98c | 785 | } |
9b405f1a PS |
786 | if (!skip_copy) { |
787 | err = copy_action(a, sfa); | |
788 | if (err) | |
789 | return err; | |
790 | } | |
23cad98c | 791 | } |
3c5f6de3 | 792 | |
23cad98c BP |
793 | if (rem > 0) |
794 | return -EINVAL; | |
064af421 | 795 | |
23cad98c | 796 | return 0; |
064af421 | 797 | } |
4edb9ae9 | 798 | |
064af421 BP |
799 | static void clear_stats(struct sw_flow *flow) |
800 | { | |
6bfafa55 | 801 | flow->used = 0; |
064af421 | 802 | flow->tcp_flags = 0; |
064af421 BP |
803 | flow->packet_count = 0; |
804 | flow->byte_count = 0; | |
805 | } | |
806 | ||
df2c07f4 | 807 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 808 | { |
df2c07f4 | 809 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 810 | struct nlattr **a = info->attrs; |
e0e57990 | 811 | struct sw_flow_actions *acts; |
982b8810 | 812 | struct sk_buff *packet; |
e0e57990 | 813 | struct sw_flow *flow; |
f7cd0081 | 814 | struct datapath *dp; |
d6569377 | 815 | struct ethhdr *eth; |
3f19d399 | 816 | int len; |
d6569377 | 817 | int err; |
76abe283 | 818 | int key_len; |
064af421 | 819 | |
f7cd0081 | 820 | err = -EINVAL; |
df2c07f4 JP |
821 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
822 | !a[OVS_PACKET_ATTR_ACTIONS] || | |
823 | nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN) | |
e5cad958 | 824 | goto err; |
064af421 | 825 | |
df2c07f4 | 826 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 827 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
828 | err = -ENOMEM; |
829 | if (!packet) | |
e5cad958 | 830 | goto err; |
3f19d399 BP |
831 | skb_reserve(packet, NET_IP_ALIGN); |
832 | ||
df2c07f4 | 833 | memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len); |
8d5ebd83 | 834 | |
f7cd0081 BP |
835 | skb_reset_mac_header(packet); |
836 | eth = eth_hdr(packet); | |
064af421 | 837 | |
d6569377 BP |
838 | /* Normally, setting the skb 'protocol' field would be handled by a |
839 | * call to eth_type_trans(), but it assumes there's a sending | |
840 | * device, which we may not have. */ | |
841 | if (ntohs(eth->h_proto) >= 1536) | |
f7cd0081 | 842 | packet->protocol = eth->h_proto; |
d6569377 | 843 | else |
f7cd0081 | 844 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 845 | |
e0e57990 | 846 | /* Build an sw_flow for sending this packet. */ |
850b6b3b | 847 | flow = ovs_flow_alloc(); |
e0e57990 BP |
848 | err = PTR_ERR(flow); |
849 | if (IS_ERR(flow)) | |
e5cad958 | 850 | goto err_kfree_skb; |
064af421 | 851 | |
850b6b3b | 852 | err = ovs_flow_extract(packet, -1, &flow->key, &key_len); |
e0e57990 | 853 | if (err) |
9321954a | 854 | goto err_flow_free; |
e0e57990 | 855 | |
13e24889 | 856 | err = ovs_flow_metadata_from_nlattrs(flow, key_len, a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 | 857 | if (err) |
9321954a | 858 | goto err_flow_free; |
9b405f1a | 859 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
e0e57990 BP |
860 | err = PTR_ERR(acts); |
861 | if (IS_ERR(acts)) | |
9321954a | 862 | goto err_flow_free; |
9b405f1a PS |
863 | |
864 | err = validate_and_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0, &acts); | |
e0e57990 | 865 | rcu_assign_pointer(flow->sf_acts, acts); |
9b405f1a PS |
866 | if (err) |
867 | goto err_flow_free; | |
e0e57990 BP |
868 | |
869 | OVS_CB(packet)->flow = flow; | |
abff858b | 870 | packet->priority = flow->key.phy.priority; |
72e8bf28 | 871 | skb_set_mark(packet, flow->key.phy.skb_mark); |
e0e57990 | 872 | |
d6569377 | 873 | rcu_read_lock(); |
2a4999f3 | 874 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 875 | err = -ENODEV; |
e5cad958 BP |
876 | if (!dp) |
877 | goto err_unlock; | |
cc4015df | 878 | |
e9141eec | 879 | local_bh_disable(); |
850b6b3b | 880 | err = ovs_execute_actions(dp, packet); |
e9141eec | 881 | local_bh_enable(); |
d6569377 | 882 | rcu_read_unlock(); |
e0e57990 | 883 | |
9321954a | 884 | ovs_flow_free(flow); |
e5cad958 | 885 | return err; |
064af421 | 886 | |
e5cad958 BP |
887 | err_unlock: |
888 | rcu_read_unlock(); | |
9321954a JG |
889 | err_flow_free: |
890 | ovs_flow_free(flow); | |
e5cad958 BP |
891 | err_kfree_skb: |
892 | kfree_skb(packet); | |
893 | err: | |
d6569377 | 894 | return err; |
064af421 BP |
895 | } |
896 | ||
df2c07f4 JP |
897 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
898 | [OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC }, | |
899 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, | |
900 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
901 | }; |
902 | ||
903 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 904 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
905 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
906 | .policy = packet_policy, | |
df2c07f4 | 907 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
908 | } |
909 | }; | |
910 | ||
df2c07f4 | 911 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) |
064af421 | 912 | { |
d6569377 | 913 | int i; |
20d035b2 | 914 | struct flow_table *table = genl_dereference(dp->table); |
f180c2e2 | 915 | |
850b6b3b | 916 | stats->n_flows = ovs_flow_tbl_count(table); |
064af421 | 917 | |
7257b535 | 918 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
d6569377 BP |
919 | for_each_possible_cpu(i) { |
920 | const struct dp_stats_percpu *percpu_stats; | |
921 | struct dp_stats_percpu local_stats; | |
821cb9fa | 922 | unsigned int start; |
44e05eca | 923 | |
d6569377 | 924 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 925 | |
d6569377 | 926 | do { |
821cb9fa | 927 | start = u64_stats_fetch_begin_bh(&percpu_stats->sync); |
d6569377 | 928 | local_stats = *percpu_stats; |
821cb9fa | 929 | } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); |
064af421 | 930 | |
d6569377 BP |
931 | stats->n_hit += local_stats.n_hit; |
932 | stats->n_missed += local_stats.n_missed; | |
933 | stats->n_lost += local_stats.n_lost; | |
934 | } | |
935 | } | |
064af421 | 936 | |
df2c07f4 JP |
937 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
938 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
939 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
940 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 941 | }; |
36956a7d | 942 | |
37a1300c BP |
943 | static struct genl_family dp_flow_genl_family = { |
944 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
945 | .hdrsize = sizeof(struct ovs_header), |
946 | .name = OVS_FLOW_FAMILY, | |
69685a88 | 947 | .version = OVS_FLOW_VERSION, |
2a4999f3 PS |
948 | .maxattr = OVS_FLOW_ATTR_MAX, |
949 | SET_NETNSOK | |
37a1300c | 950 | }; |
ed099e92 | 951 | |
850b6b3b | 952 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { |
df2c07f4 | 953 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
954 | }; |
955 | ||
9b405f1a PS |
956 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb); |
957 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) | |
958 | { | |
959 | const struct nlattr *a; | |
960 | struct nlattr *start; | |
961 | int err = 0, rem; | |
962 | ||
963 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
964 | if (!start) | |
965 | return -EMSGSIZE; | |
966 | ||
967 | nla_for_each_nested(a, attr, rem) { | |
968 | int type = nla_type(a); | |
969 | struct nlattr *st_sample; | |
970 | ||
971 | switch (type) { | |
972 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
973 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, sizeof(u32), nla_data(a))) | |
974 | return -EMSGSIZE; | |
975 | break; | |
976 | case OVS_SAMPLE_ATTR_ACTIONS: | |
977 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
978 | if (!st_sample) | |
979 | return -EMSGSIZE; | |
980 | err = actions_to_attr(nla_data(a), nla_len(a), skb); | |
981 | if (err) | |
982 | return err; | |
983 | nla_nest_end(skb, st_sample); | |
984 | break; | |
985 | } | |
986 | } | |
987 | ||
988 | nla_nest_end(skb, start); | |
989 | return err; | |
990 | } | |
991 | ||
992 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
993 | { | |
994 | const struct nlattr *ovs_key = nla_data(a); | |
995 | int key_type = nla_type(ovs_key); | |
996 | struct nlattr *start; | |
997 | int err; | |
998 | ||
999 | switch (key_type) { | |
1000 | case OVS_KEY_ATTR_IPV4_TUNNEL: | |
1001 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); | |
1002 | if (!start) | |
1003 | return -EMSGSIZE; | |
1004 | ||
1005 | err = ipv4_tun_to_nlattr(skb, nla_data(ovs_key)); | |
1006 | if (err) | |
1007 | return err; | |
1008 | nla_nest_end(skb, start); | |
1009 | break; | |
1010 | default: | |
1011 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
1012 | return -EMSGSIZE; | |
1013 | break; | |
1014 | } | |
1015 | ||
1016 | return 0; | |
1017 | } | |
1018 | ||
1019 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb) | |
1020 | { | |
1021 | const struct nlattr *a; | |
1022 | int rem, err; | |
1023 | ||
1024 | nla_for_each_attr(a, attr, len, rem) { | |
1025 | int type = nla_type(a); | |
1026 | ||
1027 | switch (type) { | |
1028 | case OVS_ACTION_ATTR_SET: | |
1029 | err = set_action_to_attr(a, skb); | |
1030 | if (err) | |
1031 | return err; | |
1032 | break; | |
1033 | ||
1034 | case OVS_ACTION_ATTR_SAMPLE: | |
1035 | err = sample_action_to_attr(a, skb); | |
1036 | if (err) | |
1037 | return err; | |
1038 | break; | |
1039 | default: | |
1040 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
1041 | return -EMSGSIZE; | |
1042 | break; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | return 0; | |
1047 | } | |
1048 | ||
37a1300c | 1049 | /* Called with genl_lock. */ |
df2c07f4 | 1050 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
28aea917 | 1051 | struct sk_buff *skb, u32 portid, |
6455100f | 1052 | u32 seq, u32 flags, u8 cmd) |
d6569377 | 1053 | { |
37a1300c | 1054 | const int skb_orig_len = skb->len; |
d6569377 | 1055 | const struct sw_flow_actions *sf_acts; |
9b405f1a | 1056 | struct nlattr *start; |
df2c07f4 JP |
1057 | struct ovs_flow_stats stats; |
1058 | struct ovs_header *ovs_header; | |
d6569377 BP |
1059 | struct nlattr *nla; |
1060 | unsigned long used; | |
1061 | u8 tcp_flags; | |
1062 | int err; | |
064af421 | 1063 | |
d6569377 | 1064 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 1065 | lockdep_genl_is_held()); |
064af421 | 1066 | |
28aea917 | 1067 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
df2c07f4 | 1068 | if (!ovs_header) |
37a1300c | 1069 | return -EMSGSIZE; |
d6569377 | 1070 | |
99769a40 | 1071 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 1072 | |
df2c07f4 | 1073 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
1074 | if (!nla) |
1075 | goto nla_put_failure; | |
850b6b3b | 1076 | err = ovs_flow_to_nlattrs(&flow->key, skb); |
d6569377 | 1077 | if (err) |
37a1300c | 1078 | goto error; |
d6569377 BP |
1079 | nla_nest_end(skb, nla); |
1080 | ||
1081 | spin_lock_bh(&flow->lock); | |
1082 | used = flow->used; | |
1083 | stats.n_packets = flow->packet_count; | |
1084 | stats.n_bytes = flow->byte_count; | |
1085 | tcp_flags = flow->tcp_flags; | |
1086 | spin_unlock_bh(&flow->lock); | |
1087 | ||
c3cc8c03 DM |
1088 | if (used && |
1089 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
1090 | goto nla_put_failure; | |
d6569377 | 1091 | |
c3cc8c03 DM |
1092 | if (stats.n_packets && |
1093 | nla_put(skb, OVS_FLOW_ATTR_STATS, | |
1094 | sizeof(struct ovs_flow_stats), &stats)) | |
1095 | goto nla_put_failure; | |
d6569377 | 1096 | |
c3cc8c03 DM |
1097 | if (tcp_flags && |
1098 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags)) | |
1099 | goto nla_put_failure; | |
d6569377 | 1100 | |
df2c07f4 | 1101 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
1102 | * this is the first flow to be dumped into 'skb'. This is unusual for |
1103 | * Netlink but individual action lists can be longer than | |
1104 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
1105 | * The userspace caller can always fetch the actions separately if it | |
1106 | * really wants them. (Most userspace callers in fact don't care.) | |
1107 | * | |
1108 | * This can only fail for dump operations because the skb is always | |
1109 | * properly sized for single flows. | |
1110 | */ | |
9b405f1a PS |
1111 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
1112 | err = actions_to_attr(sf_acts->actions, sf_acts->actions_len, skb); | |
30053024 BP |
1113 | if (err < 0 && skb_orig_len) |
1114 | goto error; | |
9b405f1a | 1115 | nla_nest_end(skb, start); |
37a1300c | 1116 | |
df2c07f4 | 1117 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1118 | |
1119 | nla_put_failure: | |
1120 | err = -EMSGSIZE; | |
37a1300c | 1121 | error: |
df2c07f4 | 1122 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 1123 | return err; |
44e05eca BP |
1124 | } |
1125 | ||
df2c07f4 | 1126 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) |
44e05eca | 1127 | { |
37a1300c BP |
1128 | const struct sw_flow_actions *sf_acts; |
1129 | int len; | |
d6569377 | 1130 | |
37a1300c BP |
1131 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
1132 | lockdep_genl_is_held()); | |
d6569377 | 1133 | |
6455100f PS |
1134 | /* OVS_FLOW_ATTR_KEY */ |
1135 | len = nla_total_size(FLOW_BUFSIZE); | |
1136 | /* OVS_FLOW_ATTR_ACTIONS */ | |
1137 | len += nla_total_size(sf_acts->actions_len); | |
1138 | /* OVS_FLOW_ATTR_STATS */ | |
1139 | len += nla_total_size(sizeof(struct ovs_flow_stats)); | |
1140 | /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
1141 | len += nla_total_size(1); | |
1142 | /* OVS_FLOW_ATTR_USED */ | |
1143 | len += nla_total_size(8); | |
1144 | ||
1145 | len += NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1146 | ||
1147 | return genlmsg_new(len, GFP_KERNEL); | |
37a1300c | 1148 | } |
8d5ebd83 | 1149 | |
6455100f PS |
1150 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, |
1151 | struct datapath *dp, | |
28aea917 | 1152 | u32 portid, u32 seq, u8 cmd) |
37a1300c BP |
1153 | { |
1154 | struct sk_buff *skb; | |
1155 | int retval; | |
d6569377 | 1156 | |
df2c07f4 | 1157 | skb = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1158 | if (!skb) |
1159 | return ERR_PTR(-ENOMEM); | |
d6569377 | 1160 | |
28aea917 | 1161 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, portid, seq, 0, cmd); |
37a1300c | 1162 | BUG_ON(retval < 0); |
d6569377 | 1163 | return skb; |
064af421 BP |
1164 | } |
1165 | ||
df2c07f4 | 1166 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1167 | { |
37a1300c | 1168 | struct nlattr **a = info->attrs; |
df2c07f4 | 1169 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1170 | struct sw_flow_key key; |
d6569377 | 1171 | struct sw_flow *flow; |
37a1300c | 1172 | struct sk_buff *reply; |
9c52546b | 1173 | struct datapath *dp; |
3544358a | 1174 | struct flow_table *table; |
9b405f1a | 1175 | struct sw_flow_actions *acts = NULL; |
bc4a05c6 | 1176 | int error; |
76abe283 | 1177 | int key_len; |
064af421 | 1178 | |
37a1300c BP |
1179 | /* Extract key. */ |
1180 | error = -EINVAL; | |
df2c07f4 | 1181 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1182 | goto error; |
850b6b3b | 1183 | error = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1184 | if (error) |
1185 | goto error; | |
064af421 | 1186 | |
37a1300c | 1187 | /* Validate actions. */ |
df2c07f4 | 1188 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
9b405f1a PS |
1189 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
1190 | error = PTR_ERR(acts); | |
1191 | if (IS_ERR(acts)) | |
37a1300c | 1192 | goto error; |
9b405f1a PS |
1193 | |
1194 | error = validate_and_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0, &acts); | |
1195 | if (error) | |
1196 | goto err_kfree; | |
df2c07f4 | 1197 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
1198 | error = -EINVAL; |
1199 | goto error; | |
1200 | } | |
1201 | ||
2a4999f3 | 1202 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
d6569377 | 1203 | error = -ENODEV; |
9c52546b | 1204 | if (!dp) |
9b405f1a | 1205 | goto err_kfree; |
704a1e09 | 1206 | |
20d035b2 | 1207 | table = genl_dereference(dp->table); |
850b6b3b | 1208 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1209 | if (!flow) { |
d6569377 BP |
1210 | /* Bail out if we're not allowed to create a new flow. */ |
1211 | error = -ENOENT; | |
df2c07f4 | 1212 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
9b405f1a | 1213 | goto err_kfree; |
d6569377 BP |
1214 | |
1215 | /* Expand table, if necessary, to make room. */ | |
850b6b3b | 1216 | if (ovs_flow_tbl_need_to_expand(table)) { |
3544358a PS |
1217 | struct flow_table *new_table; |
1218 | ||
850b6b3b | 1219 | new_table = ovs_flow_tbl_expand(table); |
3544358a PS |
1220 | if (!IS_ERR(new_table)) { |
1221 | rcu_assign_pointer(dp->table, new_table); | |
850b6b3b | 1222 | ovs_flow_tbl_deferred_destroy(table); |
20d035b2 | 1223 | table = genl_dereference(dp->table); |
3544358a | 1224 | } |
d6569377 BP |
1225 | } |
1226 | ||
1227 | /* Allocate flow. */ | |
850b6b3b | 1228 | flow = ovs_flow_alloc(); |
d6569377 BP |
1229 | if (IS_ERR(flow)) { |
1230 | error = PTR_ERR(flow); | |
9b405f1a | 1231 | goto err_kfree; |
d6569377 | 1232 | } |
d6569377 BP |
1233 | clear_stats(flow); |
1234 | ||
d6569377 BP |
1235 | rcu_assign_pointer(flow->sf_acts, acts); |
1236 | ||
d6569377 | 1237 | /* Put flow in bucket. */ |
13e24889 | 1238 | ovs_flow_tbl_insert(table, flow, &key, key_len); |
37a1300c | 1239 | |
28aea917 | 1240 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f PS |
1241 | info->snd_seq, |
1242 | OVS_FLOW_CMD_NEW); | |
d6569377 BP |
1243 | } else { |
1244 | /* We found a matching flow. */ | |
1245 | struct sw_flow_actions *old_acts; | |
1246 | ||
1247 | /* Bail out if we're not allowed to modify an existing flow. | |
1248 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1249 | * because Generic Netlink treats the latter as a dump | |
1250 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1251 | * gets fixed. | |
1252 | */ | |
1253 | error = -EEXIST; | |
df2c07f4 | 1254 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c | 1255 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
9b405f1a | 1256 | goto err_kfree; |
d6569377 BP |
1257 | |
1258 | /* Update actions. */ | |
d6569377 | 1259 | old_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 1260 | lockdep_genl_is_held()); |
9b405f1a PS |
1261 | rcu_assign_pointer(flow->sf_acts, acts); |
1262 | ovs_flow_deferred_free_acts(old_acts); | |
d6569377 | 1263 | |
28aea917 | 1264 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f | 1265 | info->snd_seq, OVS_FLOW_CMD_NEW); |
d6569377 BP |
1266 | |
1267 | /* Clear stats. */ | |
df2c07f4 | 1268 | if (a[OVS_FLOW_ATTR_CLEAR]) { |
d6569377 BP |
1269 | spin_lock_bh(&flow->lock); |
1270 | clear_stats(flow); | |
1271 | spin_unlock_bh(&flow->lock); | |
1272 | } | |
9c52546b | 1273 | } |
37a1300c BP |
1274 | |
1275 | if (!IS_ERR(reply)) | |
28aea917 | 1276 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b JG |
1277 | ovs_dp_flow_multicast_group.id, info->nlhdr, |
1278 | GFP_KERNEL); | |
37a1300c | 1279 | else |
2a4999f3 PS |
1280 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
1281 | ovs_dp_flow_multicast_group.id, PTR_ERR(reply)); | |
d6569377 | 1282 | return 0; |
704a1e09 | 1283 | |
9b405f1a PS |
1284 | err_kfree: |
1285 | kfree(acts); | |
37a1300c | 1286 | error: |
9c52546b | 1287 | return error; |
704a1e09 BP |
1288 | } |
1289 | ||
df2c07f4 | 1290 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1291 | { |
37a1300c | 1292 | struct nlattr **a = info->attrs; |
df2c07f4 | 1293 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1294 | struct sw_flow_key key; |
37a1300c | 1295 | struct sk_buff *reply; |
704a1e09 | 1296 | struct sw_flow *flow; |
9c52546b | 1297 | struct datapath *dp; |
3544358a | 1298 | struct flow_table *table; |
9c52546b | 1299 | int err; |
76abe283 | 1300 | int key_len; |
704a1e09 | 1301 | |
df2c07f4 | 1302 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1303 | return -EINVAL; |
850b6b3b | 1304 | err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1305 | if (err) |
1306 | return err; | |
704a1e09 | 1307 | |
2a4999f3 | 1308 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
9c52546b | 1309 | if (!dp) |
ed099e92 | 1310 | return -ENODEV; |
704a1e09 | 1311 | |
20d035b2 | 1312 | table = genl_dereference(dp->table); |
850b6b3b | 1313 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1314 | if (!flow) |
ed099e92 | 1315 | return -ENOENT; |
d6569377 | 1316 | |
28aea917 | 1317 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f | 1318 | info->snd_seq, OVS_FLOW_CMD_NEW); |
37a1300c BP |
1319 | if (IS_ERR(reply)) |
1320 | return PTR_ERR(reply); | |
36956a7d | 1321 | |
37a1300c | 1322 | return genlmsg_reply(reply, info); |
d6569377 | 1323 | } |
9c52546b | 1324 | |
df2c07f4 | 1325 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1326 | { |
37a1300c | 1327 | struct nlattr **a = info->attrs; |
df2c07f4 | 1328 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1329 | struct sw_flow_key key; |
37a1300c | 1330 | struct sk_buff *reply; |
d6569377 | 1331 | struct sw_flow *flow; |
d6569377 | 1332 | struct datapath *dp; |
3544358a | 1333 | struct flow_table *table; |
d6569377 | 1334 | int err; |
76abe283 | 1335 | int key_len; |
36956a7d | 1336 | |
2a4999f3 PS |
1337 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
1338 | if (!dp) | |
1339 | return -ENODEV; | |
1340 | ||
df2c07f4 | 1341 | if (!a[OVS_FLOW_ATTR_KEY]) |
2a4999f3 PS |
1342 | return flush_flows(dp); |
1343 | ||
850b6b3b | 1344 | err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1345 | if (err) |
1346 | return err; | |
d6569377 | 1347 | |
20d035b2 | 1348 | table = genl_dereference(dp->table); |
850b6b3b | 1349 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1350 | if (!flow) |
37a1300c | 1351 | return -ENOENT; |
d6569377 | 1352 | |
df2c07f4 | 1353 | reply = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1354 | if (!reply) |
1355 | return -ENOMEM; | |
1356 | ||
850b6b3b | 1357 | ovs_flow_tbl_remove(table, flow); |
37a1300c | 1358 | |
28aea917 | 1359 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid, |
df2c07f4 | 1360 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); |
37a1300c BP |
1361 | BUG_ON(err < 0); |
1362 | ||
850b6b3b | 1363 | ovs_flow_deferred_free(flow); |
37a1300c | 1364 | |
28aea917 | 1365 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b | 1366 | ovs_dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); |
37a1300c BP |
1367 | return 0; |
1368 | } | |
1369 | ||
df2c07f4 | 1370 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1371 | { |
df2c07f4 | 1372 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
37a1300c | 1373 | struct datapath *dp; |
20d035b2 | 1374 | struct flow_table *table; |
37a1300c | 1375 | |
2a4999f3 | 1376 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
37a1300c BP |
1377 | if (!dp) |
1378 | return -ENODEV; | |
1379 | ||
20d035b2 JG |
1380 | table = genl_dereference(dp->table); |
1381 | ||
37a1300c | 1382 | for (;;) { |
37a1300c BP |
1383 | struct sw_flow *flow; |
1384 | u32 bucket, obj; | |
1385 | ||
1386 | bucket = cb->args[0]; | |
1387 | obj = cb->args[1]; | |
850b6b3b | 1388 | flow = ovs_flow_tbl_next(table, &bucket, &obj); |
3544358a | 1389 | if (!flow) |
37a1300c BP |
1390 | break; |
1391 | ||
6455100f | 1392 | if (ovs_flow_cmd_fill_info(flow, dp, skb, |
28aea917 | 1393 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1394 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1395 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1396 | break; |
1397 | ||
1398 | cb->args[0] = bucket; | |
1399 | cb->args[1] = obj; | |
1400 | } | |
1401 | return skb->len; | |
704a1e09 BP |
1402 | } |
1403 | ||
37a1300c | 1404 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1405 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1406 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1407 | .policy = flow_policy, | |
df2c07f4 | 1408 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1409 | }, |
df2c07f4 | 1410 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1411 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1412 | .policy = flow_policy, | |
df2c07f4 | 1413 | .doit = ovs_flow_cmd_del |
37a1300c | 1414 | }, |
df2c07f4 | 1415 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1416 | .flags = 0, /* OK for unprivileged users. */ |
1417 | .policy = flow_policy, | |
df2c07f4 JP |
1418 | .doit = ovs_flow_cmd_get, |
1419 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1420 | }, |
df2c07f4 | 1421 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1422 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1423 | .policy = flow_policy, | |
df2c07f4 | 1424 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1425 | }, |
1426 | }; | |
1427 | ||
df2c07f4 | 1428 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
aaff4b55 | 1429 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1430 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
aaff4b55 | 1431 | #endif |
b063d9f0 | 1432 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
d6569377 BP |
1433 | }; |
1434 | ||
aaff4b55 BP |
1435 | static struct genl_family dp_datapath_genl_family = { |
1436 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1437 | .hdrsize = sizeof(struct ovs_header), |
1438 | .name = OVS_DATAPATH_FAMILY, | |
69685a88 | 1439 | .version = OVS_DATAPATH_VERSION, |
2a4999f3 PS |
1440 | .maxattr = OVS_DP_ATTR_MAX, |
1441 | SET_NETNSOK | |
aaff4b55 BP |
1442 | }; |
1443 | ||
850b6b3b | 1444 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
df2c07f4 | 1445 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1446 | }; |
1447 | ||
df2c07f4 | 1448 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1449 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1450 | { |
df2c07f4 | 1451 | struct ovs_header *ovs_header; |
e926dfe3 | 1452 | struct ovs_dp_stats dp_stats; |
064af421 BP |
1453 | int err; |
1454 | ||
28aea917 | 1455 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1456 | flags, cmd); |
df2c07f4 | 1457 | if (!ovs_header) |
aaff4b55 | 1458 | goto error; |
064af421 | 1459 | |
b063d9f0 | 1460 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1461 | |
d6569377 | 1462 | rcu_read_lock(); |
850b6b3b | 1463 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
d6569377 | 1464 | rcu_read_unlock(); |
064af421 | 1465 | if (err) |
d6569377 | 1466 | goto nla_put_failure; |
064af421 | 1467 | |
e926dfe3 | 1468 | get_dp_stats(dp, &dp_stats); |
c3cc8c03 DM |
1469 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats)) |
1470 | goto nla_put_failure; | |
d6569377 | 1471 | |
df2c07f4 | 1472 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1473 | |
1474 | nla_put_failure: | |
df2c07f4 | 1475 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1476 | error: |
1477 | return -EMSGSIZE; | |
d6569377 BP |
1478 | } |
1479 | ||
28aea917 | 1480 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 portid, |
aaff4b55 | 1481 | u32 seq, u8 cmd) |
d6569377 | 1482 | { |
d6569377 | 1483 | struct sk_buff *skb; |
aaff4b55 | 1484 | int retval; |
d6569377 | 1485 | |
aaff4b55 | 1486 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
064af421 | 1487 | if (!skb) |
d6569377 | 1488 | return ERR_PTR(-ENOMEM); |
659586ef | 1489 | |
28aea917 | 1490 | retval = ovs_dp_cmd_fill_info(dp, skb, portid, seq, 0, cmd); |
aaff4b55 BP |
1491 | if (retval < 0) { |
1492 | kfree_skb(skb); | |
1493 | return ERR_PTR(retval); | |
1494 | } | |
1495 | return skb; | |
1496 | } | |
9dca7bd5 | 1497 | |
df2c07f4 | 1498 | static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
aaff4b55 | 1499 | { |
df2c07f4 | 1500 | return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1); |
d6569377 BP |
1501 | } |
1502 | ||
ed099e92 | 1503 | /* Called with genl_mutex and optionally with RTNL lock also. */ |
2a4999f3 PS |
1504 | static struct datapath *lookup_datapath(struct net *net, |
1505 | struct ovs_header *ovs_header, | |
6455100f | 1506 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1507 | { |
254f2dc8 BP |
1508 | struct datapath *dp; |
1509 | ||
df2c07f4 | 1510 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1511 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1512 | else { |
d6569377 | 1513 | struct vport *vport; |
d6569377 | 1514 | |
057dd6d2 | 1515 | rcu_read_lock(); |
2a4999f3 | 1516 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1517 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
057dd6d2 | 1518 | rcu_read_unlock(); |
d6569377 | 1519 | } |
254f2dc8 | 1520 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1521 | } |
1522 | ||
df2c07f4 | 1523 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1524 | { |
aaff4b55 | 1525 | struct nlattr **a = info->attrs; |
d6569377 | 1526 | struct vport_parms parms; |
aaff4b55 | 1527 | struct sk_buff *reply; |
d6569377 BP |
1528 | struct datapath *dp; |
1529 | struct vport *vport; | |
2a4999f3 | 1530 | struct ovs_net *ovs_net; |
95b1d73a | 1531 | int err, i; |
d6569377 | 1532 | |
d6569377 | 1533 | err = -EINVAL; |
ea36840f | 1534 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1535 | goto err; |
1536 | ||
df2c07f4 | 1537 | err = ovs_dp_cmd_validate(a); |
aaff4b55 BP |
1538 | if (err) |
1539 | goto err; | |
d6569377 BP |
1540 | |
1541 | rtnl_lock(); | |
d6569377 | 1542 | |
d6569377 BP |
1543 | err = -ENOMEM; |
1544 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1545 | if (dp == NULL) | |
2a4999f3 PS |
1546 | goto err_unlock_rtnl; |
1547 | ||
0ceaa66c JG |
1548 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1549 | ||
d6569377 BP |
1550 | /* Allocate table. */ |
1551 | err = -ENOMEM; | |
850b6b3b | 1552 | rcu_assign_pointer(dp->table, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS)); |
d6569377 BP |
1553 | if (!dp->table) |
1554 | goto err_free_dp; | |
1555 | ||
99769a40 JG |
1556 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); |
1557 | if (!dp->stats_percpu) { | |
1558 | err = -ENOMEM; | |
1559 | goto err_destroy_table; | |
1560 | } | |
1561 | ||
95b1d73a PS |
1562 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1563 | GFP_KERNEL); | |
1564 | if (!dp->ports) { | |
1565 | err = -ENOMEM; | |
1566 | goto err_destroy_percpu; | |
1567 | } | |
1568 | ||
1569 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1570 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1571 | ||
d6569377 | 1572 | /* Set up our datapath device. */ |
df2c07f4 JP |
1573 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1574 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1575 | parms.options = NULL; |
1576 | parms.dp = dp; | |
df2c07f4 | 1577 | parms.port_no = OVSP_LOCAL; |
28aea917 | 1578 | parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
b063d9f0 | 1579 | |
d6569377 BP |
1580 | vport = new_vport(&parms); |
1581 | if (IS_ERR(vport)) { | |
1582 | err = PTR_ERR(vport); | |
1583 | if (err == -EBUSY) | |
1584 | err = -EEXIST; | |
1585 | ||
95b1d73a | 1586 | goto err_destroy_ports_array; |
d6569377 | 1587 | } |
d6569377 | 1588 | |
28aea917 | 1589 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1590 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1591 | err = PTR_ERR(reply); |
1592 | if (IS_ERR(reply)) | |
1593 | goto err_destroy_local_port; | |
1594 | ||
2a4999f3 PS |
1595 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
1596 | list_add_tail(&dp->list_node, &ovs_net->dps); | |
d6569377 | 1597 | |
d6569377 BP |
1598 | rtnl_unlock(); |
1599 | ||
28aea917 | 1600 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b JG |
1601 | ovs_dp_datapath_multicast_group.id, info->nlhdr, |
1602 | GFP_KERNEL); | |
d6569377 BP |
1603 | return 0; |
1604 | ||
1605 | err_destroy_local_port: | |
95b1d73a PS |
1606 | ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL)); |
1607 | err_destroy_ports_array: | |
1608 | kfree(dp->ports); | |
99769a40 JG |
1609 | err_destroy_percpu: |
1610 | free_percpu(dp->stats_percpu); | |
d6569377 | 1611 | err_destroy_table: |
850b6b3b | 1612 | ovs_flow_tbl_destroy(genl_dereference(dp->table)); |
d6569377 | 1613 | err_free_dp: |
0ceaa66c | 1614 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1615 | kfree(dp); |
ed099e92 | 1616 | err_unlock_rtnl: |
d6569377 | 1617 | rtnl_unlock(); |
d6569377 | 1618 | err: |
064af421 BP |
1619 | return err; |
1620 | } | |
1621 | ||
2a4999f3 PS |
1622 | /* Called with genl_mutex. */ |
1623 | static void __dp_destroy(struct datapath *dp) | |
44e05eca | 1624 | { |
95b1d73a | 1625 | int i; |
44e05eca | 1626 | |
d6569377 | 1627 | rtnl_lock(); |
95b1d73a PS |
1628 | |
1629 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1630 | struct vport *vport; | |
1631 | struct hlist_node *node, *n; | |
1632 | ||
1633 | hlist_for_each_entry_safe(vport, node, n, &dp->ports[i], dp_hash_node) | |
1634 | if (vport->port_no != OVSP_LOCAL) | |
1635 | ovs_dp_detach_port(vport); | |
1636 | } | |
ed099e92 | 1637 | |
254f2dc8 | 1638 | list_del(&dp->list_node); |
95b1d73a | 1639 | ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL)); |
ed099e92 | 1640 | |
99620d2c JG |
1641 | /* rtnl_unlock() will wait until all the references to devices that |
1642 | * are pending unregistration have been dropped. We do it here to | |
1643 | * ensure that any internal devices (which contain DP pointers) are | |
1644 | * fully destroyed before freeing the datapath. | |
1645 | */ | |
1646 | rtnl_unlock(); | |
1647 | ||
ed099e92 | 1648 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1649 | } |
1650 | ||
1651 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1652 | { | |
1653 | struct sk_buff *reply; | |
1654 | struct datapath *dp; | |
1655 | int err; | |
1656 | ||
1657 | err = ovs_dp_cmd_validate(info->attrs); | |
1658 | if (err) | |
1659 | return err; | |
1660 | ||
1661 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
1662 | err = PTR_ERR(dp); | |
1663 | if (IS_ERR(dp)) | |
1664 | return err; | |
1665 | ||
28aea917 | 1666 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
2a4999f3 PS |
1667 | info->snd_seq, OVS_DP_CMD_DEL); |
1668 | err = PTR_ERR(reply); | |
1669 | if (IS_ERR(reply)) | |
1670 | return err; | |
1671 | ||
1672 | __dp_destroy(dp); | |
ed099e92 | 1673 | |
28aea917 | 1674 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b JG |
1675 | ovs_dp_datapath_multicast_group.id, info->nlhdr, |
1676 | GFP_KERNEL); | |
99620d2c JG |
1677 | |
1678 | return 0; | |
44e05eca BP |
1679 | } |
1680 | ||
df2c07f4 | 1681 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1682 | { |
aaff4b55 | 1683 | struct sk_buff *reply; |
d6569377 | 1684 | struct datapath *dp; |
d6569377 | 1685 | int err; |
064af421 | 1686 | |
df2c07f4 | 1687 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1688 | if (err) |
1689 | return err; | |
38c6ecbc | 1690 | |
2a4999f3 | 1691 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
d6569377 | 1692 | if (IS_ERR(dp)) |
aaff4b55 | 1693 | return PTR_ERR(dp); |
38c6ecbc | 1694 | |
28aea917 | 1695 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1696 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1697 | if (IS_ERR(reply)) { |
1698 | err = PTR_ERR(reply); | |
2a4999f3 | 1699 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
850b6b3b | 1700 | ovs_dp_datapath_multicast_group.id, err); |
aaff4b55 BP |
1701 | return 0; |
1702 | } | |
1703 | ||
28aea917 | 1704 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b JG |
1705 | ovs_dp_datapath_multicast_group.id, info->nlhdr, |
1706 | GFP_KERNEL); | |
1707 | ||
aaff4b55 | 1708 | return 0; |
064af421 BP |
1709 | } |
1710 | ||
df2c07f4 | 1711 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1712 | { |
aaff4b55 | 1713 | struct sk_buff *reply; |
d6569377 | 1714 | struct datapath *dp; |
d6569377 | 1715 | int err; |
1dcf111b | 1716 | |
df2c07f4 | 1717 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1718 | if (err) |
1719 | return err; | |
1dcf111b | 1720 | |
2a4999f3 | 1721 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
d6569377 | 1722 | if (IS_ERR(dp)) |
aaff4b55 | 1723 | return PTR_ERR(dp); |
1dcf111b | 1724 | |
28aea917 | 1725 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1726 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1727 | if (IS_ERR(reply)) |
1728 | return PTR_ERR(reply); | |
1729 | ||
1730 | return genlmsg_reply(reply, info); | |
1dcf111b JP |
1731 | } |
1732 | ||
df2c07f4 | 1733 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1734 | { |
2a4999f3 | 1735 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1736 | struct datapath *dp; |
1737 | int skip = cb->args[0]; | |
1738 | int i = 0; | |
a7786963 | 1739 | |
2a4999f3 | 1740 | list_for_each_entry(dp, &ovs_net->dps, list_node) { |
a2bab2f0 | 1741 | if (i >= skip && |
28aea917 | 1742 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1743 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1744 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1745 | break; |
254f2dc8 | 1746 | i++; |
a7786963 | 1747 | } |
aaff4b55 | 1748 | |
254f2dc8 BP |
1749 | cb->args[0] = i; |
1750 | ||
aaff4b55 | 1751 | return skb->len; |
c19e6535 BP |
1752 | } |
1753 | ||
aaff4b55 | 1754 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1755 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1756 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1757 | .policy = datapath_policy, | |
df2c07f4 | 1758 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1759 | }, |
df2c07f4 | 1760 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1761 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1762 | .policy = datapath_policy, | |
df2c07f4 | 1763 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1764 | }, |
df2c07f4 | 1765 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1766 | .flags = 0, /* OK for unprivileged users. */ |
1767 | .policy = datapath_policy, | |
df2c07f4 JP |
1768 | .doit = ovs_dp_cmd_get, |
1769 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1770 | }, |
df2c07f4 | 1771 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1772 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1773 | .policy = datapath_policy, | |
df2c07f4 | 1774 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1775 | }, |
1776 | }; | |
1777 | ||
df2c07f4 | 1778 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
f0fef760 | 1779 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1780 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1781 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1782 | [OVS_VPORT_ATTR_ADDRESS] = { .len = ETH_ALEN }, |
f0fef760 | 1783 | #else |
f613a0d7 | 1784 | [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1785 | [OVS_VPORT_ATTR_ADDRESS] = { .minlen = ETH_ALEN }, |
f0fef760 | 1786 | #endif |
d48c88ec JG |
1787 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1788 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1789 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1790 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1791 | }; |
1792 | ||
f0fef760 BP |
1793 | static struct genl_family dp_vport_genl_family = { |
1794 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1795 | .hdrsize = sizeof(struct ovs_header), |
1796 | .name = OVS_VPORT_FAMILY, | |
69685a88 | 1797 | .version = OVS_VPORT_VERSION, |
2a4999f3 PS |
1798 | .maxattr = OVS_VPORT_ATTR_MAX, |
1799 | SET_NETNSOK | |
f0fef760 BP |
1800 | }; |
1801 | ||
850b6b3b | 1802 | struct genl_multicast_group ovs_dp_vport_multicast_group = { |
df2c07f4 | 1803 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1804 | }; |
1805 | ||
1806 | /* Called with RTNL lock or RCU read lock. */ | |
df2c07f4 | 1807 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1808 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1809 | { |
df2c07f4 | 1810 | struct ovs_header *ovs_header; |
e926dfe3 | 1811 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1812 | int err; |
1813 | ||
28aea917 | 1814 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1815 | flags, cmd); |
df2c07f4 | 1816 | if (!ovs_header) |
f0fef760 | 1817 | return -EMSGSIZE; |
c19e6535 | 1818 | |
99769a40 | 1819 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1820 | |
c3cc8c03 DM |
1821 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1822 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
1823 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || | |
28aea917 | 1824 | nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid)) |
c3cc8c03 | 1825 | goto nla_put_failure; |
c19e6535 | 1826 | |
850b6b3b | 1827 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1828 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1829 | &vport_stats)) | |
1830 | goto nla_put_failure; | |
c19e6535 | 1831 | |
c3cc8c03 DM |
1832 | if (nla_put(skb, OVS_VPORT_ATTR_ADDRESS, ETH_ALEN, |
1833 | vport->ops->get_addr(vport))) | |
1834 | goto nla_put_failure; | |
c19e6535 | 1835 | |
850b6b3b | 1836 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1837 | if (err == -EMSGSIZE) |
1838 | goto error; | |
c19e6535 | 1839 | |
df2c07f4 | 1840 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1841 | |
1842 | nla_put_failure: | |
1843 | err = -EMSGSIZE; | |
f0fef760 | 1844 | error: |
df2c07f4 | 1845 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1846 | return err; |
064af421 BP |
1847 | } |
1848 | ||
f0fef760 | 1849 | /* Called with RTNL lock or RCU read lock. */ |
28aea917 | 1850 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 1851 | u32 seq, u8 cmd) |
064af421 | 1852 | { |
c19e6535 | 1853 | struct sk_buff *skb; |
f0fef760 | 1854 | int retval; |
c19e6535 | 1855 | |
f0fef760 | 1856 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1857 | if (!skb) |
1858 | return ERR_PTR(-ENOMEM); | |
1859 | ||
28aea917 | 1860 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
f0fef760 BP |
1861 | if (retval < 0) { |
1862 | kfree_skb(skb); | |
1863 | return ERR_PTR(retval); | |
1864 | } | |
c19e6535 | 1865 | return skb; |
f0fef760 | 1866 | } |
c19e6535 | 1867 | |
df2c07f4 | 1868 | static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
f0fef760 | 1869 | { |
df2c07f4 | 1870 | return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1); |
c19e6535 | 1871 | } |
51d4d598 | 1872 | |
ed099e92 | 1873 | /* Called with RTNL lock or RCU read lock. */ |
2a4999f3 PS |
1874 | static struct vport *lookup_vport(struct net *net, |
1875 | struct ovs_header *ovs_header, | |
df2c07f4 | 1876 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1877 | { |
1878 | struct datapath *dp; | |
1879 | struct vport *vport; | |
1880 | ||
df2c07f4 | 1881 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1882 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1883 | if (!vport) |
c19e6535 | 1884 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1885 | if (ovs_header->dp_ifindex && |
1886 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1887 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1888 | return vport; |
df2c07f4 JP |
1889 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1890 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1891 | |
1892 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1893 | return ERR_PTR(-EFBIG); |
c19e6535 | 1894 | |
2a4999f3 | 1895 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1896 | if (!dp) |
1897 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1898 | |
95b1d73a | 1899 | vport = ovs_vport_rtnl_rcu(dp, port_no); |
ed099e92 | 1900 | if (!vport) |
17535c57 | 1901 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1902 | return vport; |
1903 | } else | |
1904 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1905 | } |
1906 | ||
ed099e92 | 1907 | /* Called with RTNL lock. */ |
6455100f PS |
1908 | static int change_vport(struct vport *vport, |
1909 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) | |
064af421 | 1910 | { |
c19e6535 | 1911 | int err = 0; |
f613a0d7 | 1912 | |
df2c07f4 | 1913 | if (a[OVS_VPORT_ATTR_STATS]) |
850b6b3b | 1914 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); |
f613a0d7 PS |
1915 | |
1916 | if (a[OVS_VPORT_ATTR_ADDRESS]) | |
850b6b3b | 1917 | err = ovs_vport_set_addr(vport, nla_data(a[OVS_VPORT_ATTR_ADDRESS])); |
f613a0d7 | 1918 | |
c19e6535 BP |
1919 | return err; |
1920 | } | |
1921 | ||
df2c07f4 | 1922 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1923 | { |
f0fef760 | 1924 | struct nlattr **a = info->attrs; |
df2c07f4 | 1925 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1926 | struct vport_parms parms; |
ed099e92 | 1927 | struct sk_buff *reply; |
c19e6535 | 1928 | struct vport *vport; |
c19e6535 | 1929 | struct datapath *dp; |
b0ec0f27 | 1930 | u32 port_no; |
c19e6535 | 1931 | int err; |
b0ec0f27 | 1932 | |
c19e6535 | 1933 | err = -EINVAL; |
ea36840f BP |
1934 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1935 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
f0fef760 BP |
1936 | goto exit; |
1937 | ||
df2c07f4 | 1938 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1939 | if (err) |
1940 | goto exit; | |
51d4d598 | 1941 | |
c19e6535 | 1942 | rtnl_lock(); |
2a4999f3 | 1943 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1944 | err = -ENODEV; |
1945 | if (!dp) | |
ed099e92 | 1946 | goto exit_unlock; |
c19e6535 | 1947 | |
df2c07f4 JP |
1948 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1949 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1950 | |
1951 | err = -EFBIG; | |
1952 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 1953 | goto exit_unlock; |
c19e6535 | 1954 | |
95b1d73a | 1955 | vport = ovs_vport_rtnl(dp, port_no); |
c19e6535 BP |
1956 | err = -EBUSY; |
1957 | if (vport) | |
ed099e92 | 1958 | goto exit_unlock; |
c19e6535 BP |
1959 | } else { |
1960 | for (port_no = 1; ; port_no++) { | |
1961 | if (port_no >= DP_MAX_PORTS) { | |
1962 | err = -EFBIG; | |
ed099e92 | 1963 | goto exit_unlock; |
c19e6535 | 1964 | } |
95b1d73a | 1965 | vport = ovs_vport_rtnl(dp, port_no); |
c19e6535 BP |
1966 | if (!vport) |
1967 | break; | |
51d4d598 | 1968 | } |
064af421 | 1969 | } |
b0ec0f27 | 1970 | |
df2c07f4 JP |
1971 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1972 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1973 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1974 | parms.dp = dp; |
1975 | parms.port_no = port_no; | |
28aea917 | 1976 | parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 BP |
1977 | |
1978 | vport = new_vport(&parms); | |
1979 | err = PTR_ERR(vport); | |
1980 | if (IS_ERR(vport)) | |
ed099e92 | 1981 | goto exit_unlock; |
c19e6535 | 1982 | |
c19e6535 | 1983 | err = change_vport(vport, a); |
f0fef760 | 1984 | if (!err) { |
28aea917 | 1985 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
6455100f PS |
1986 | info->snd_seq, |
1987 | OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1988 | if (IS_ERR(reply)) |
1989 | err = PTR_ERR(reply); | |
1990 | } | |
c19e6535 | 1991 | if (err) { |
850b6b3b | 1992 | ovs_dp_detach_port(vport); |
ed099e92 | 1993 | goto exit_unlock; |
c19e6535 | 1994 | } |
28aea917 | 1995 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b | 1996 | ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); |
c19e6535 | 1997 | |
ed099e92 | 1998 | exit_unlock: |
c19e6535 | 1999 | rtnl_unlock(); |
c19e6535 BP |
2000 | exit: |
2001 | return err; | |
44e05eca BP |
2002 | } |
2003 | ||
df2c07f4 | 2004 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 2005 | { |
f0fef760 BP |
2006 | struct nlattr **a = info->attrs; |
2007 | struct sk_buff *reply; | |
c19e6535 | 2008 | struct vport *vport; |
c19e6535 | 2009 | int err; |
44e05eca | 2010 | |
df2c07f4 | 2011 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 2012 | if (err) |
c19e6535 BP |
2013 | goto exit; |
2014 | ||
2015 | rtnl_lock(); | |
2a4999f3 | 2016 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
2017 | err = PTR_ERR(vport); |
2018 | if (IS_ERR(vport)) | |
f0fef760 | 2019 | goto exit_unlock; |
44e05eca | 2020 | |
c19e6535 | 2021 | err = 0; |
6455100f | 2022 | if (a[OVS_VPORT_ATTR_TYPE] && |
16b82e84 | 2023 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) |
4879d4c7 | 2024 | err = -EINVAL; |
6455100f | 2025 | |
4879d4c7 | 2026 | if (!err && a[OVS_VPORT_ATTR_OPTIONS]) |
850b6b3b | 2027 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
c19e6535 BP |
2028 | if (!err) |
2029 | err = change_vport(vport, a); | |
53509ad5 AA |
2030 | else |
2031 | goto exit_unlock; | |
b063d9f0 | 2032 | if (!err && a[OVS_VPORT_ATTR_UPCALL_PID]) |
28aea917 | 2033 | vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 | 2034 | |
28aea917 IY |
2035 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2036 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
f0fef760 | 2037 | if (IS_ERR(reply)) { |
2a4999f3 | 2038 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
7a6c067d AA |
2039 | ovs_dp_vport_multicast_group.id, PTR_ERR(reply)); |
2040 | goto exit_unlock; | |
f0fef760 BP |
2041 | } |
2042 | ||
28aea917 | 2043 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b | 2044 | ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); |
f0fef760 BP |
2045 | |
2046 | exit_unlock: | |
c19e6535 BP |
2047 | rtnl_unlock(); |
2048 | exit: | |
2049 | return err; | |
064af421 BP |
2050 | } |
2051 | ||
df2c07f4 | 2052 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2053 | { |
f0fef760 BP |
2054 | struct nlattr **a = info->attrs; |
2055 | struct sk_buff *reply; | |
c19e6535 | 2056 | struct vport *vport; |
c19e6535 BP |
2057 | int err; |
2058 | ||
df2c07f4 | 2059 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 2060 | if (err) |
c19e6535 BP |
2061 | goto exit; |
2062 | ||
2063 | rtnl_lock(); | |
2a4999f3 | 2064 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 2065 | err = PTR_ERR(vport); |
f0fef760 BP |
2066 | if (IS_ERR(vport)) |
2067 | goto exit_unlock; | |
c19e6535 | 2068 | |
df2c07f4 | 2069 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
2070 | err = -EINVAL; |
2071 | goto exit_unlock; | |
2072 | } | |
2073 | ||
28aea917 IY |
2074 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2075 | info->snd_seq, OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
2076 | err = PTR_ERR(reply); |
2077 | if (IS_ERR(reply)) | |
2078 | goto exit_unlock; | |
2079 | ||
850b6b3b | 2080 | ovs_dp_detach_port(vport); |
f0fef760 | 2081 | |
28aea917 | 2082 | genl_notify(reply, genl_info_net(info), info->snd_portid, |
850b6b3b | 2083 | ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); |
f0fef760 BP |
2084 | |
2085 | exit_unlock: | |
c19e6535 BP |
2086 | rtnl_unlock(); |
2087 | exit: | |
2088 | return err; | |
7c40efc9 BP |
2089 | } |
2090 | ||
df2c07f4 | 2091 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2092 | { |
f0fef760 | 2093 | struct nlattr **a = info->attrs; |
df2c07f4 | 2094 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 2095 | struct sk_buff *reply; |
c19e6535 | 2096 | struct vport *vport; |
c19e6535 BP |
2097 | int err; |
2098 | ||
df2c07f4 | 2099 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
2100 | if (err) |
2101 | goto exit; | |
c19e6535 | 2102 | |
ed099e92 | 2103 | rcu_read_lock(); |
2a4999f3 | 2104 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2105 | err = PTR_ERR(vport); |
2106 | if (IS_ERR(vport)) | |
f0fef760 | 2107 | goto exit_unlock; |
c19e6535 | 2108 | |
28aea917 IY |
2109 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2110 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
2111 | err = PTR_ERR(reply); |
2112 | if (IS_ERR(reply)) | |
f0fef760 | 2113 | goto exit_unlock; |
ed099e92 | 2114 | |
df2fa9b5 JG |
2115 | rcu_read_unlock(); |
2116 | ||
2117 | return genlmsg_reply(reply, info); | |
ed099e92 | 2118 | |
f0fef760 | 2119 | exit_unlock: |
ed099e92 | 2120 | rcu_read_unlock(); |
f0fef760 | 2121 | exit: |
c19e6535 BP |
2122 | return err; |
2123 | } | |
2124 | ||
df2c07f4 | 2125 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2126 | { |
df2c07f4 | 2127 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2128 | struct datapath *dp; |
95b1d73a PS |
2129 | int bucket = cb->args[0], skip = cb->args[1]; |
2130 | int i, j = 0; | |
c19e6535 | 2131 | |
2a4999f3 | 2132 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 | 2133 | if (!dp) |
f0fef760 | 2134 | return -ENODEV; |
ed099e92 BP |
2135 | |
2136 | rcu_read_lock(); | |
95b1d73a | 2137 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2138 | struct vport *vport; |
95b1d73a PS |
2139 | struct hlist_node *n; |
2140 | ||
2141 | j = 0; | |
2142 | hlist_for_each_entry_rcu(vport, n, &dp->ports[i], dp_hash_node) { | |
2143 | if (j >= skip && | |
2144 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 2145 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2146 | cb->nlh->nlmsg_seq, |
2147 | NLM_F_MULTI, | |
2148 | OVS_VPORT_CMD_NEW) < 0) | |
2149 | goto out; | |
2150 | ||
2151 | j++; | |
2152 | } | |
2153 | skip = 0; | |
c19e6535 | 2154 | } |
95b1d73a | 2155 | out: |
ed099e92 | 2156 | rcu_read_unlock(); |
c19e6535 | 2157 | |
95b1d73a PS |
2158 | cb->args[0] = i; |
2159 | cb->args[1] = j; | |
f0fef760 | 2160 | |
95b1d73a | 2161 | return skb->len; |
7c40efc9 BP |
2162 | } |
2163 | ||
f0fef760 | 2164 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2165 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
2166 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2167 | .policy = vport_policy, | |
df2c07f4 | 2168 | .doit = ovs_vport_cmd_new |
f0fef760 | 2169 | }, |
df2c07f4 | 2170 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
2171 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2172 | .policy = vport_policy, | |
df2c07f4 | 2173 | .doit = ovs_vport_cmd_del |
f0fef760 | 2174 | }, |
df2c07f4 | 2175 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2176 | .flags = 0, /* OK for unprivileged users. */ |
2177 | .policy = vport_policy, | |
df2c07f4 JP |
2178 | .doit = ovs_vport_cmd_get, |
2179 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2180 | }, |
df2c07f4 | 2181 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
2182 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2183 | .policy = vport_policy, | |
df2c07f4 | 2184 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2185 | }, |
2186 | }; | |
2187 | ||
982b8810 BP |
2188 | struct genl_family_and_ops { |
2189 | struct genl_family *family; | |
2190 | struct genl_ops *ops; | |
2191 | int n_ops; | |
2192 | struct genl_multicast_group *group; | |
2193 | }; | |
ed099e92 | 2194 | |
982b8810 | 2195 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
2196 | { &dp_datapath_genl_family, |
2197 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
850b6b3b | 2198 | &ovs_dp_datapath_multicast_group }, |
f0fef760 BP |
2199 | { &dp_vport_genl_family, |
2200 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
850b6b3b | 2201 | &ovs_dp_vport_multicast_group }, |
37a1300c BP |
2202 | { &dp_flow_genl_family, |
2203 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
850b6b3b | 2204 | &ovs_dp_flow_multicast_group }, |
982b8810 BP |
2205 | { &dp_packet_genl_family, |
2206 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
2207 | NULL }, | |
2208 | }; | |
ed099e92 | 2209 | |
982b8810 BP |
2210 | static void dp_unregister_genl(int n_families) |
2211 | { | |
2212 | int i; | |
ed099e92 | 2213 | |
b867ca75 | 2214 | for (i = 0; i < n_families; i++) |
982b8810 | 2215 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
2216 | } |
2217 | ||
982b8810 | 2218 | static int dp_register_genl(void) |
064af421 | 2219 | { |
982b8810 BP |
2220 | int n_registered; |
2221 | int err; | |
2222 | int i; | |
064af421 | 2223 | |
982b8810 BP |
2224 | n_registered = 0; |
2225 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2226 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 2227 | |
982b8810 BP |
2228 | err = genl_register_family_with_ops(f->family, f->ops, |
2229 | f->n_ops); | |
2230 | if (err) | |
2231 | goto error; | |
2232 | n_registered++; | |
e22d4953 | 2233 | |
982b8810 BP |
2234 | if (f->group) { |
2235 | err = genl_register_mc_group(f->family, f->group); | |
2236 | if (err) | |
2237 | goto error; | |
2238 | } | |
2239 | } | |
9cc8b4e4 | 2240 | |
982b8810 | 2241 | return 0; |
064af421 BP |
2242 | |
2243 | error: | |
982b8810 BP |
2244 | dp_unregister_genl(n_registered); |
2245 | return err; | |
064af421 BP |
2246 | } |
2247 | ||
acd051f1 PS |
2248 | static int __rehash_flow_table(void *dummy) |
2249 | { | |
2250 | struct datapath *dp; | |
2a4999f3 PS |
2251 | struct net *net; |
2252 | ||
2253 | rtnl_lock(); | |
2254 | for_each_net(net) { | |
2255 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
acd051f1 | 2256 | |
2a4999f3 PS |
2257 | list_for_each_entry(dp, &ovs_net->dps, list_node) { |
2258 | struct flow_table *old_table = genl_dereference(dp->table); | |
2259 | struct flow_table *new_table; | |
acd051f1 | 2260 | |
2a4999f3 PS |
2261 | new_table = ovs_flow_tbl_rehash(old_table); |
2262 | if (!IS_ERR(new_table)) { | |
2263 | rcu_assign_pointer(dp->table, new_table); | |
2264 | ovs_flow_tbl_deferred_destroy(old_table); | |
2265 | } | |
acd051f1 PS |
2266 | } |
2267 | } | |
2a4999f3 | 2268 | rtnl_unlock(); |
acd051f1 PS |
2269 | return 0; |
2270 | } | |
2271 | ||
2272 | static void rehash_flow_table(struct work_struct *work) | |
2273 | { | |
2274 | genl_exec(__rehash_flow_table, NULL); | |
2275 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); | |
2276 | } | |
2277 | ||
2a4999f3 PS |
2278 | static int dp_destroy_all(void *data) |
2279 | { | |
2280 | struct datapath *dp, *dp_next; | |
2281 | struct ovs_net *ovs_net = data; | |
2282 | ||
2283 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2284 | __dp_destroy(dp); | |
2285 | ||
2286 | return 0; | |
2287 | } | |
2288 | ||
2289 | static int __net_init ovs_init_net(struct net *net) | |
2290 | { | |
2291 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2292 | ||
2293 | INIT_LIST_HEAD(&ovs_net->dps); | |
2294 | return 0; | |
2295 | } | |
2296 | ||
2297 | static void __net_exit ovs_exit_net(struct net *net) | |
2298 | { | |
2299 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2300 | ||
2301 | genl_exec(dp_destroy_all, ovs_net); | |
2302 | } | |
2303 | ||
2304 | static struct pernet_operations ovs_net_ops = { | |
2305 | .init = ovs_init_net, | |
2306 | .exit = ovs_exit_net, | |
2307 | .id = &ovs_net_id, | |
2308 | .size = sizeof(struct ovs_net), | |
2309 | }; | |
2310 | ||
22d24ebf BP |
2311 | static int __init dp_init(void) |
2312 | { | |
2313 | int err; | |
2314 | ||
f3d85db3 | 2315 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2316 | |
dc5f3fef | 2317 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 2318 | VERSION); |
064af421 | 2319 | |
b9c15df9 | 2320 | err = genl_exec_init(); |
064af421 BP |
2321 | if (err) |
2322 | goto error; | |
2323 | ||
16d650e5 | 2324 | err = ovs_workqueues_init(); |
b9c15df9 PS |
2325 | if (err) |
2326 | goto error_genl_exec; | |
2327 | ||
16d650e5 PS |
2328 | err = ovs_tnl_init(); |
2329 | if (err) | |
2330 | goto error_wq; | |
2331 | ||
850b6b3b | 2332 | err = ovs_flow_init(); |
3544358a PS |
2333 | if (err) |
2334 | goto error_tnl_exit; | |
2335 | ||
850b6b3b | 2336 | err = ovs_vport_init(); |
064af421 BP |
2337 | if (err) |
2338 | goto error_flow_exit; | |
2339 | ||
2a4999f3 | 2340 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2341 | if (err) |
2342 | goto error_vport_exit; | |
2343 | ||
2a4999f3 PS |
2344 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2345 | if (err) | |
2346 | goto error_netns_exit; | |
2347 | ||
982b8810 BP |
2348 | err = dp_register_genl(); |
2349 | if (err < 0) | |
37a1300c | 2350 | goto error_unreg_notifier; |
982b8810 | 2351 | |
acd051f1 PS |
2352 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); |
2353 | ||
064af421 BP |
2354 | return 0; |
2355 | ||
2356 | error_unreg_notifier: | |
850b6b3b | 2357 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2358 | error_netns_exit: |
2359 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2360 | error_vport_exit: |
850b6b3b | 2361 | ovs_vport_exit(); |
064af421 | 2362 | error_flow_exit: |
850b6b3b | 2363 | ovs_flow_exit(); |
3544358a | 2364 | error_tnl_exit: |
850b6b3b | 2365 | ovs_tnl_exit(); |
16d650e5 PS |
2366 | error_wq: |
2367 | ovs_workqueues_exit(); | |
b9c15df9 PS |
2368 | error_genl_exec: |
2369 | genl_exec_exit(); | |
064af421 BP |
2370 | error: |
2371 | return err; | |
2372 | } | |
2373 | ||
2374 | static void dp_cleanup(void) | |
2375 | { | |
acd051f1 | 2376 | cancel_delayed_work_sync(&rehash_flow_wq); |
982b8810 | 2377 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
850b6b3b | 2378 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2379 | unregister_pernet_device(&ovs_net_ops); |
2380 | rcu_barrier(); | |
850b6b3b JG |
2381 | ovs_vport_exit(); |
2382 | ovs_flow_exit(); | |
2383 | ovs_tnl_exit(); | |
16d650e5 | 2384 | ovs_workqueues_exit(); |
b9c15df9 | 2385 | genl_exec_exit(); |
064af421 BP |
2386 | } |
2387 | ||
2388 | module_init(dp_init); | |
2389 | module_exit(dp_cleanup); | |
2390 | ||
2391 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2392 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2393 | MODULE_VERSION(VERSION); |