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Commit | Line | Data |
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064af421 | 1 | /* |
a6057323 | 2 | * Copyright (c) 2007, 2008, 2009, 2010 Nicira Networks. |
a14bc59f BP |
3 | * Distributed under the terms of the GNU GPL version 2. |
4 | * | |
5 | * Significant portions of this file may be copied from parts of the Linux | |
6 | * kernel, by Linus Torvalds and others. | |
064af421 BP |
7 | */ |
8 | ||
9 | /* Functions for managing the dp interface/device. */ | |
10 | ||
dfffaef1 JP |
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
12 | ||
064af421 BP |
13 | #include <linux/init.h> |
14 | #include <linux/module.h> | |
15 | #include <linux/fs.h> | |
16 | #include <linux/if_arp.h> | |
064af421 BP |
17 | #include <linux/if_vlan.h> |
18 | #include <linux/in.h> | |
19 | #include <linux/ip.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/time.h> | |
22 | #include <linux/etherdevice.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/kthread.h> | |
064af421 BP |
25 | #include <linux/mutex.h> |
26 | #include <linux/percpu.h> | |
27 | #include <linux/rcupdate.h> | |
28 | #include <linux/tcp.h> | |
29 | #include <linux/udp.h> | |
30 | #include <linux/version.h> | |
31 | #include <linux/ethtool.h> | |
064af421 BP |
32 | #include <linux/wait.h> |
33 | #include <asm/system.h> | |
34 | #include <asm/div64.h> | |
35 | #include <asm/bug.h> | |
656a0e37 | 36 | #include <linux/highmem.h> |
064af421 BP |
37 | #include <linux/netfilter_bridge.h> |
38 | #include <linux/netfilter_ipv4.h> | |
39 | #include <linux/inetdevice.h> | |
40 | #include <linux/list.h> | |
41 | #include <linux/rculist.h> | |
064af421 | 42 | #include <linux/dmi.h> |
3c5f6de3 | 43 | #include <net/inet_ecn.h> |
3fbd517a | 44 | #include <linux/compat.h> |
064af421 BP |
45 | |
46 | #include "openvswitch/datapath-protocol.h" | |
dd8d6b8c | 47 | #include "checksum.h" |
064af421 BP |
48 | #include "datapath.h" |
49 | #include "actions.h" | |
064af421 | 50 | #include "flow.h" |
7eaa9830 | 51 | #include "loop_counter.h" |
3fbd517a | 52 | #include "odp-compat.h" |
8d5ebd83 | 53 | #include "table.h" |
f2459fe7 | 54 | #include "vport-internal_dev.h" |
064af421 BP |
55 | |
56 | #include "compat.h" | |
57 | ||
064af421 BP |
58 | int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd); |
59 | EXPORT_SYMBOL(dp_ioctl_hook); | |
60 | ||
064af421 | 61 | /* Datapaths. Protected on the read side by rcu_read_lock, on the write side |
0d3b8a34 | 62 | * by dp_mutex. |
064af421 BP |
63 | * |
64 | * dp_mutex nests inside the RTNL lock: if you need both you must take the RTNL | |
65 | * lock first. | |
66 | * | |
e779d8d9 | 67 | * It is safe to access the datapath and vport structures with just |
064af421 BP |
68 | * dp_mutex. |
69 | */ | |
e1040c77 | 70 | static struct datapath __rcu *dps[ODP_MAX]; |
064af421 BP |
71 | static DEFINE_MUTEX(dp_mutex); |
72 | ||
e779d8d9 | 73 | static int new_vport(struct datapath *, struct odp_port *, int port_no); |
064af421 BP |
74 | |
75 | /* Must be called with rcu_read_lock or dp_mutex. */ | |
76 | struct datapath *get_dp(int dp_idx) | |
77 | { | |
78 | if (dp_idx < 0 || dp_idx >= ODP_MAX) | |
79 | return NULL; | |
eb3ccf11 JG |
80 | return rcu_dereference_check(dps[dp_idx], rcu_read_lock_held() || |
81 | lockdep_is_held(&dp_mutex)); | |
064af421 BP |
82 | } |
83 | EXPORT_SYMBOL_GPL(get_dp); | |
84 | ||
35f7605b | 85 | static struct datapath *get_dp_locked(int dp_idx) |
064af421 BP |
86 | { |
87 | struct datapath *dp; | |
88 | ||
89 | mutex_lock(&dp_mutex); | |
90 | dp = get_dp(dp_idx); | |
91 | if (dp) | |
92 | mutex_lock(&dp->mutex); | |
93 | mutex_unlock(&dp_mutex); | |
94 | return dp; | |
95 | } | |
96 | ||
9abaf6b3 JG |
97 | static struct tbl *get_table_protected(struct datapath *dp) |
98 | { | |
99 | return rcu_dereference_protected(dp->table, lockdep_is_held(&dp->mutex)); | |
100 | } | |
101 | ||
f2459fe7 JG |
102 | /* Must be called with rcu_read_lock or RTNL lock. */ |
103 | const char *dp_name(const struct datapath *dp) | |
104 | { | |
ad919711 | 105 | return vport_get_name(rcu_dereference_rtnl(dp->ports[ODPP_LOCAL])); |
f2459fe7 JG |
106 | } |
107 | ||
064af421 BP |
108 | static inline size_t br_nlmsg_size(void) |
109 | { | |
110 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
111 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
112 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
113 | + nla_total_size(4) /* IFLA_MASTER */ | |
114 | + nla_total_size(4) /* IFLA_MTU */ | |
115 | + nla_total_size(4) /* IFLA_LINK */ | |
116 | + nla_total_size(1); /* IFLA_OPERSTATE */ | |
117 | } | |
118 | ||
119 | static int dp_fill_ifinfo(struct sk_buff *skb, | |
e779d8d9 | 120 | const struct vport *port, |
064af421 BP |
121 | int event, unsigned int flags) |
122 | { | |
123 | const struct datapath *dp = port->dp; | |
e779d8d9 BP |
124 | int ifindex = vport_get_ifindex(port); |
125 | int iflink = vport_get_iflink(port); | |
064af421 BP |
126 | struct ifinfomsg *hdr; |
127 | struct nlmsghdr *nlh; | |
128 | ||
f2459fe7 JG |
129 | if (ifindex < 0) |
130 | return ifindex; | |
131 | ||
132 | if (iflink < 0) | |
133 | return iflink; | |
134 | ||
064af421 BP |
135 | nlh = nlmsg_put(skb, 0, 0, event, sizeof(*hdr), flags); |
136 | if (nlh == NULL) | |
137 | return -EMSGSIZE; | |
138 | ||
139 | hdr = nlmsg_data(nlh); | |
140 | hdr->ifi_family = AF_BRIDGE; | |
141 | hdr->__ifi_pad = 0; | |
f2459fe7 JG |
142 | hdr->ifi_type = ARPHRD_ETHER; |
143 | hdr->ifi_index = ifindex; | |
e779d8d9 | 144 | hdr->ifi_flags = vport_get_flags(port); |
064af421 BP |
145 | hdr->ifi_change = 0; |
146 | ||
e779d8d9 | 147 | NLA_PUT_STRING(skb, IFLA_IFNAME, vport_get_name(port)); |
ad919711 JG |
148 | NLA_PUT_U32(skb, IFLA_MASTER, |
149 | vport_get_ifindex(rtnl_dereference(dp->ports[ODPP_LOCAL]))); | |
e779d8d9 | 150 | NLA_PUT_U32(skb, IFLA_MTU, vport_get_mtu(port)); |
064af421 BP |
151 | #ifdef IFLA_OPERSTATE |
152 | NLA_PUT_U8(skb, IFLA_OPERSTATE, | |
e779d8d9 BP |
153 | vport_is_running(port) |
154 | ? vport_get_operstate(port) | |
f2459fe7 | 155 | : IF_OPER_DOWN); |
064af421 BP |
156 | #endif |
157 | ||
e779d8d9 | 158 | NLA_PUT(skb, IFLA_ADDRESS, ETH_ALEN, vport_get_addr(port)); |
064af421 | 159 | |
f2459fe7 JG |
160 | if (ifindex != iflink) |
161 | NLA_PUT_U32(skb, IFLA_LINK,iflink); | |
064af421 BP |
162 | |
163 | return nlmsg_end(skb, nlh); | |
164 | ||
165 | nla_put_failure: | |
166 | nlmsg_cancel(skb, nlh); | |
167 | return -EMSGSIZE; | |
168 | } | |
169 | ||
e779d8d9 | 170 | static void dp_ifinfo_notify(int event, struct vport *port) |
064af421 | 171 | { |
064af421 BP |
172 | struct sk_buff *skb; |
173 | int err = -ENOBUFS; | |
174 | ||
175 | skb = nlmsg_new(br_nlmsg_size(), GFP_KERNEL); | |
176 | if (skb == NULL) | |
177 | goto errout; | |
178 | ||
179 | err = dp_fill_ifinfo(skb, port, event, 0); | |
180 | if (err < 0) { | |
181 | /* -EMSGSIZE implies BUG in br_nlmsg_size() */ | |
182 | WARN_ON(err == -EMSGSIZE); | |
183 | kfree_skb(skb); | |
184 | goto errout; | |
185 | } | |
f2459fe7 | 186 | rtnl_notify(skb, &init_net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); |
cfe7c1f5 | 187 | return; |
064af421 BP |
188 | errout: |
189 | if (err < 0) | |
f2459fe7 | 190 | rtnl_set_sk_err(&init_net, RTNLGRP_LINK, err); |
064af421 BP |
191 | } |
192 | ||
58c342f6 BP |
193 | static void release_dp(struct kobject *kobj) |
194 | { | |
195 | struct datapath *dp = container_of(kobj, struct datapath, ifobj); | |
196 | kfree(dp); | |
197 | } | |
198 | ||
35f7605b | 199 | static struct kobj_type dp_ktype = { |
58c342f6 BP |
200 | .release = release_dp |
201 | }; | |
202 | ||
064af421 BP |
203 | static int create_dp(int dp_idx, const char __user *devnamep) |
204 | { | |
f2459fe7 | 205 | struct odp_port internal_dev_port; |
064af421 BP |
206 | char devname[IFNAMSIZ]; |
207 | struct datapath *dp; | |
208 | int err; | |
209 | int i; | |
210 | ||
211 | if (devnamep) { | |
968f7c8d BP |
212 | int retval = strncpy_from_user(devname, devnamep, IFNAMSIZ); |
213 | if (retval < 0) { | |
214 | err = -EFAULT; | |
064af421 | 215 | goto err; |
968f7c8d BP |
216 | } else if (retval >= IFNAMSIZ) { |
217 | err = -ENAMETOOLONG; | |
218 | goto err; | |
219 | } | |
064af421 BP |
220 | } else { |
221 | snprintf(devname, sizeof devname, "of%d", dp_idx); | |
222 | } | |
223 | ||
224 | rtnl_lock(); | |
225 | mutex_lock(&dp_mutex); | |
226 | err = -ENODEV; | |
227 | if (!try_module_get(THIS_MODULE)) | |
228 | goto err_unlock; | |
229 | ||
230 | /* Exit early if a datapath with that number already exists. | |
231 | * (We don't use -EEXIST because that's ambiguous with 'devname' | |
232 | * conflicting with an existing network device name.) */ | |
233 | err = -EBUSY; | |
234 | if (get_dp(dp_idx)) | |
235 | goto err_put_module; | |
236 | ||
237 | err = -ENOMEM; | |
238 | dp = kzalloc(sizeof *dp, GFP_KERNEL); | |
239 | if (dp == NULL) | |
240 | goto err_put_module; | |
828bc1f0 | 241 | INIT_LIST_HEAD(&dp->port_list); |
064af421 BP |
242 | mutex_init(&dp->mutex); |
243 | dp->dp_idx = dp_idx; | |
244 | for (i = 0; i < DP_N_QUEUES; i++) | |
245 | skb_queue_head_init(&dp->queues[i]); | |
246 | init_waitqueue_head(&dp->waitqueue); | |
247 | ||
58c342f6 | 248 | /* Initialize kobject for bridge. This will be added as |
b0c32774 | 249 | * /sys/class/net/<devname>/brif later, if sysfs is enabled. */ |
58c342f6 | 250 | dp->ifobj.kset = NULL; |
58c342f6 BP |
251 | kobject_init(&dp->ifobj, &dp_ktype); |
252 | ||
828bc1f0 BP |
253 | /* Allocate table. */ |
254 | err = -ENOMEM; | |
c6fadeb1 | 255 | rcu_assign_pointer(dp->table, tbl_create(TBL_MIN_BUCKETS)); |
828bc1f0 BP |
256 | if (!dp->table) |
257 | goto err_free_dp; | |
258 | ||
d6fbec6d | 259 | /* Set up our datapath device. */ |
092a872d BP |
260 | BUILD_BUG_ON(sizeof(internal_dev_port.devname) != sizeof(devname)); |
261 | strcpy(internal_dev_port.devname, devname); | |
c3827f61 | 262 | strcpy(internal_dev_port.type, "internal"); |
e779d8d9 | 263 | err = new_vport(dp, &internal_dev_port, ODPP_LOCAL); |
828bc1f0 | 264 | if (err) { |
f2459fe7 JG |
265 | if (err == -EBUSY) |
266 | err = -EEXIST; | |
267 | ||
064af421 | 268 | goto err_destroy_table; |
828bc1f0 | 269 | } |
064af421 BP |
270 | |
271 | dp->drop_frags = 0; | |
272 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); | |
94947cd8 JG |
273 | if (!dp->stats_percpu) { |
274 | err = -ENOMEM; | |
064af421 | 275 | goto err_destroy_local_port; |
94947cd8 | 276 | } |
064af421 BP |
277 | |
278 | rcu_assign_pointer(dps[dp_idx], dp); | |
dad80ec3 JG |
279 | dp_sysfs_add_dp(dp); |
280 | ||
064af421 BP |
281 | mutex_unlock(&dp_mutex); |
282 | rtnl_unlock(); | |
283 | ||
064af421 BP |
284 | return 0; |
285 | ||
286 | err_destroy_local_port: | |
c3827f61 | 287 | dp_detach_port(dp->ports[ODPP_LOCAL]); |
064af421 | 288 | err_destroy_table: |
8d5ebd83 | 289 | tbl_destroy(dp->table, NULL); |
064af421 BP |
290 | err_free_dp: |
291 | kfree(dp); | |
292 | err_put_module: | |
293 | module_put(THIS_MODULE); | |
294 | err_unlock: | |
295 | mutex_unlock(&dp_mutex); | |
296 | rtnl_unlock(); | |
297 | err: | |
298 | return err; | |
299 | } | |
300 | ||
72ca14c1 | 301 | static void do_destroy_dp(struct datapath *dp) |
064af421 | 302 | { |
e779d8d9 | 303 | struct vport *p, *n; |
064af421 BP |
304 | int i; |
305 | ||
6fba0d0b BP |
306 | list_for_each_entry_safe (p, n, &dp->port_list, node) |
307 | if (p->port_no != ODPP_LOCAL) | |
c3827f61 | 308 | dp_detach_port(p); |
6fba0d0b | 309 | |
2ba9026e | 310 | dp_sysfs_del_dp(dp); |
064af421 | 311 | |
064af421 | 312 | rcu_assign_pointer(dps[dp->dp_idx], NULL); |
064af421 | 313 | |
c3827f61 | 314 | dp_detach_port(dp->ports[ODPP_LOCAL]); |
6fba0d0b | 315 | |
8d5ebd83 | 316 | tbl_destroy(dp->table, flow_free_tbl); |
6fba0d0b | 317 | |
064af421 BP |
318 | for (i = 0; i < DP_N_QUEUES; i++) |
319 | skb_queue_purge(&dp->queues[i]); | |
064af421 | 320 | free_percpu(dp->stats_percpu); |
58c342f6 | 321 | kobject_put(&dp->ifobj); |
064af421 BP |
322 | module_put(THIS_MODULE); |
323 | } | |
324 | ||
325 | static int destroy_dp(int dp_idx) | |
326 | { | |
064af421 | 327 | struct datapath *dp; |
064af421 BP |
328 | int err; |
329 | ||
330 | rtnl_lock(); | |
331 | mutex_lock(&dp_mutex); | |
332 | dp = get_dp(dp_idx); | |
333 | err = -ENODEV; | |
334 | if (!dp) | |
335 | goto err_unlock; | |
336 | ||
72ca14c1 | 337 | do_destroy_dp(dp); |
064af421 BP |
338 | err = 0; |
339 | ||
340 | err_unlock: | |
341 | mutex_unlock(&dp_mutex); | |
342 | rtnl_unlock(); | |
064af421 BP |
343 | return err; |
344 | } | |
345 | ||
346 | /* Called with RTNL lock and dp_mutex. */ | |
e779d8d9 | 347 | static int new_vport(struct datapath *dp, struct odp_port *odp_port, int port_no) |
064af421 | 348 | { |
c3827f61 | 349 | struct vport_parms parms; |
f2459fe7 | 350 | struct vport *vport; |
f2459fe7 | 351 | |
c3827f61 BP |
352 | parms.name = odp_port->devname; |
353 | parms.type = odp_port->type; | |
354 | parms.config = odp_port->config; | |
e779d8d9 BP |
355 | parms.dp = dp; |
356 | parms.port_no = port_no; | |
f2459fe7 | 357 | |
c3827f61 BP |
358 | vport_lock(); |
359 | vport = vport_add(&parms); | |
360 | vport_unlock(); | |
064af421 | 361 | |
c3827f61 BP |
362 | if (IS_ERR(vport)) |
363 | return PTR_ERR(vport); | |
064af421 | 364 | |
e779d8d9 BP |
365 | rcu_assign_pointer(dp->ports[port_no], vport); |
366 | list_add_rcu(&vport->node, &dp->port_list); | |
064af421 BP |
367 | dp->n_ports++; |
368 | ||
e779d8d9 | 369 | dp_ifinfo_notify(RTM_NEWLINK, vport); |
064af421 BP |
370 | |
371 | return 0; | |
372 | } | |
373 | ||
f2459fe7 | 374 | static int attach_port(int dp_idx, struct odp_port __user *portp) |
064af421 | 375 | { |
064af421 BP |
376 | struct datapath *dp; |
377 | struct odp_port port; | |
378 | int port_no; | |
379 | int err; | |
380 | ||
381 | err = -EFAULT; | |
382 | if (copy_from_user(&port, portp, sizeof port)) | |
383 | goto out; | |
384 | port.devname[IFNAMSIZ - 1] = '\0'; | |
c3827f61 | 385 | port.type[VPORT_TYPE_SIZE - 1] = '\0'; |
064af421 BP |
386 | |
387 | rtnl_lock(); | |
388 | dp = get_dp_locked(dp_idx); | |
389 | err = -ENODEV; | |
390 | if (!dp) | |
391 | goto out_unlock_rtnl; | |
392 | ||
9ee3ae3e BP |
393 | for (port_no = 1; port_no < DP_MAX_PORTS; port_no++) |
394 | if (!dp->ports[port_no]) | |
395 | goto got_port_no; | |
3c71830a | 396 | err = -EFBIG; |
9ee3ae3e | 397 | goto out_unlock_dp; |
064af421 | 398 | |
9ee3ae3e | 399 | got_port_no: |
e779d8d9 | 400 | err = new_vport(dp, &port, port_no); |
064af421 | 401 | if (err) |
f2459fe7 | 402 | goto out_unlock_dp; |
064af421 | 403 | |
d8b5d43a | 404 | set_internal_devs_mtu(dp); |
2ba9026e | 405 | dp_sysfs_add_if(dp->ports[port_no]); |
064af421 | 406 | |
776f10ce | 407 | err = put_user(port_no, &portp->port); |
064af421 | 408 | |
064af421 BP |
409 | out_unlock_dp: |
410 | mutex_unlock(&dp->mutex); | |
411 | out_unlock_rtnl: | |
412 | rtnl_unlock(); | |
413 | out: | |
414 | return err; | |
415 | } | |
416 | ||
e779d8d9 | 417 | int dp_detach_port(struct vport *p) |
064af421 | 418 | { |
f2459fe7 JG |
419 | int err; |
420 | ||
064af421 BP |
421 | ASSERT_RTNL(); |
422 | ||
2e7dd8ec | 423 | if (p->port_no != ODPP_LOCAL) |
0515ceb3 | 424 | dp_sysfs_del_if(p); |
064af421 BP |
425 | dp_ifinfo_notify(RTM_DELLINK, p); |
426 | ||
064af421 | 427 | /* First drop references to device. */ |
f2459fe7 | 428 | p->dp->n_ports--; |
064af421 BP |
429 | list_del_rcu(&p->node); |
430 | rcu_assign_pointer(p->dp->ports[p->port_no], NULL); | |
f2459fe7 | 431 | |
7237e4f4 | 432 | /* Then destroy it. */ |
c3827f61 | 433 | vport_lock(); |
7237e4f4 | 434 | err = vport_del(p); |
c3827f61 | 435 | vport_unlock(); |
f2459fe7 | 436 | |
7237e4f4 | 437 | return err; |
064af421 BP |
438 | } |
439 | ||
f2459fe7 | 440 | static int detach_port(int dp_idx, int port_no) |
064af421 | 441 | { |
e779d8d9 | 442 | struct vport *p; |
064af421 | 443 | struct datapath *dp; |
064af421 BP |
444 | int err; |
445 | ||
446 | err = -EINVAL; | |
447 | if (port_no < 0 || port_no >= DP_MAX_PORTS || port_no == ODPP_LOCAL) | |
448 | goto out; | |
449 | ||
450 | rtnl_lock(); | |
451 | dp = get_dp_locked(dp_idx); | |
452 | err = -ENODEV; | |
453 | if (!dp) | |
454 | goto out_unlock_rtnl; | |
455 | ||
456 | p = dp->ports[port_no]; | |
457 | err = -ENOENT; | |
458 | if (!p) | |
459 | goto out_unlock_dp; | |
460 | ||
c3827f61 | 461 | err = dp_detach_port(p); |
064af421 BP |
462 | |
463 | out_unlock_dp: | |
464 | mutex_unlock(&dp->mutex); | |
465 | out_unlock_rtnl: | |
466 | rtnl_unlock(); | |
467 | out: | |
064af421 BP |
468 | return err; |
469 | } | |
470 | ||
8819fac7 | 471 | /* Must be called with rcu_read_lock. */ |
e779d8d9 | 472 | void dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
473 | { |
474 | struct datapath *dp = p->dp; | |
475 | struct dp_stats_percpu *stats; | |
8819fac7 | 476 | int stats_counter_off; |
55574bb0 BP |
477 | struct sw_flow_actions *acts; |
478 | struct loop_counter *loop; | |
4c1ad233 | 479 | int error; |
064af421 | 480 | |
e779d8d9 | 481 | OVS_CB(skb)->vport = p; |
a063b0df | 482 | |
3976f6d5 JG |
483 | if (!OVS_CB(skb)->flow) { |
484 | struct odp_flow_key key; | |
485 | struct tbl_node *flow_node; | |
b7a31ec1 | 486 | bool is_frag; |
4c1ad233 | 487 | |
3976f6d5 | 488 | /* Extract flow from 'skb' into 'key'. */ |
b7a31ec1 | 489 | error = flow_extract(skb, p ? p->port_no : ODPP_NONE, &key, &is_frag); |
3976f6d5 JG |
490 | if (unlikely(error)) { |
491 | kfree_skb(skb); | |
492 | return; | |
493 | } | |
064af421 | 494 | |
b7a31ec1 | 495 | if (is_frag && dp->drop_frags) { |
3976f6d5 JG |
496 | kfree_skb(skb); |
497 | stats_counter_off = offsetof(struct dp_stats_percpu, n_frags); | |
498 | goto out; | |
499 | } | |
500 | ||
501 | /* Look up flow. */ | |
502 | flow_node = tbl_lookup(rcu_dereference(dp->table), &key, | |
503 | flow_hash(&key), flow_cmp); | |
504 | if (unlikely(!flow_node)) { | |
8dda8c9b JG |
505 | dp_output_control(dp, skb, _ODPL_MISS_NR, |
506 | (__force u64)OVS_CB(skb)->tun_id); | |
3976f6d5 JG |
507 | stats_counter_off = offsetof(struct dp_stats_percpu, n_missed); |
508 | goto out; | |
509 | } | |
510 | ||
511 | OVS_CB(skb)->flow = flow_cast(flow_node); | |
55574bb0 BP |
512 | } |
513 | ||
f267de8a | 514 | stats_counter_off = offsetof(struct dp_stats_percpu, n_hit); |
3976f6d5 | 515 | flow_used(OVS_CB(skb)->flow, skb); |
55574bb0 | 516 | |
3976f6d5 | 517 | acts = rcu_dereference(OVS_CB(skb)->flow->sf_acts); |
55574bb0 BP |
518 | |
519 | /* Check whether we've looped too much. */ | |
7eaa9830 JG |
520 | loop = loop_get_counter(); |
521 | if (unlikely(++loop->count > MAX_LOOPS)) | |
55574bb0 BP |
522 | loop->looping = true; |
523 | if (unlikely(loop->looping)) { | |
7eaa9830 | 524 | loop_suppress(dp, acts); |
f267de8a | 525 | kfree_skb(skb); |
55574bb0 | 526 | goto out_loop; |
064af421 | 527 | } |
8819fac7 | 528 | |
55574bb0 | 529 | /* Execute actions. */ |
3976f6d5 | 530 | execute_actions(dp, skb, &OVS_CB(skb)->flow->key, acts->actions, |
cdee00fd | 531 | acts->actions_len); |
55574bb0 BP |
532 | |
533 | /* Check whether sub-actions looped too much. */ | |
534 | if (unlikely(loop->looping)) | |
7eaa9830 | 535 | loop_suppress(dp, acts); |
55574bb0 BP |
536 | |
537 | out_loop: | |
538 | /* Decrement loop counter. */ | |
539 | if (!--loop->count) | |
540 | loop->looping = false; | |
7eaa9830 | 541 | loop_put_counter(); |
55574bb0 | 542 | |
8819fac7 | 543 | out: |
55574bb0 | 544 | /* Update datapath statistics. */ |
8819fac7 JG |
545 | local_bh_disable(); |
546 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); | |
38c6ecbc JG |
547 | |
548 | write_seqcount_begin(&stats->seqlock); | |
8819fac7 | 549 | (*(u64 *)((u8 *)stats + stats_counter_off))++; |
38c6ecbc JG |
550 | write_seqcount_end(&stats->seqlock); |
551 | ||
8819fac7 | 552 | local_bh_enable(); |
064af421 BP |
553 | } |
554 | ||
cb5087ca BP |
555 | /* Append each packet in 'skb' list to 'queue'. There will be only one packet |
556 | * unless we broke up a GSO packet. */ | |
fceb2a5b | 557 | static int queue_control_packets(struct sk_buff *skb, struct sk_buff_head *queue, |
b9298d3f | 558 | int queue_no, u64 arg) |
cb5087ca BP |
559 | { |
560 | struct sk_buff *nskb; | |
561 | int port_no; | |
562 | int err; | |
563 | ||
e779d8d9 BP |
564 | if (OVS_CB(skb)->vport) |
565 | port_no = OVS_CB(skb)->vport->port_no; | |
f2459fe7 JG |
566 | else |
567 | port_no = ODPP_LOCAL; | |
cb5087ca BP |
568 | |
569 | do { | |
570 | struct odp_msg *header; | |
571 | ||
572 | nskb = skb->next; | |
573 | skb->next = NULL; | |
574 | ||
cb5087ca BP |
575 | err = skb_cow(skb, sizeof *header); |
576 | if (err) | |
577 | goto err_kfree_skbs; | |
578 | ||
579 | header = (struct odp_msg*)__skb_push(skb, sizeof *header); | |
580 | header->type = queue_no; | |
581 | header->length = skb->len; | |
582 | header->port = port_no; | |
cb5087ca BP |
583 | header->arg = arg; |
584 | skb_queue_tail(queue, skb); | |
585 | ||
586 | skb = nskb; | |
587 | } while (skb); | |
588 | return 0; | |
589 | ||
590 | err_kfree_skbs: | |
591 | kfree_skb(skb); | |
592 | while ((skb = nskb) != NULL) { | |
593 | nskb = skb->next; | |
594 | kfree_skb(skb); | |
595 | } | |
596 | return err; | |
597 | } | |
598 | ||
fceb2a5b | 599 | int dp_output_control(struct datapath *dp, struct sk_buff *skb, int queue_no, |
b9298d3f | 600 | u64 arg) |
064af421 BP |
601 | { |
602 | struct dp_stats_percpu *stats; | |
603 | struct sk_buff_head *queue; | |
064af421 BP |
604 | int err; |
605 | ||
606 | WARN_ON_ONCE(skb_shared(skb)); | |
72b06300 | 607 | BUG_ON(queue_no != _ODPL_MISS_NR && queue_no != _ODPL_ACTION_NR && queue_no != _ODPL_SFLOW_NR); |
064af421 BP |
608 | queue = &dp->queues[queue_no]; |
609 | err = -ENOBUFS; | |
610 | if (skb_queue_len(queue) >= DP_MAX_QUEUE_LEN) | |
611 | goto err_kfree_skb; | |
612 | ||
a6057323 JG |
613 | forward_ip_summed(skb); |
614 | ||
a2377e44 JG |
615 | err = vswitch_skb_checksum_setup(skb); |
616 | if (err) | |
617 | goto err_kfree_skb; | |
618 | ||
064af421 BP |
619 | /* Break apart GSO packets into their component pieces. Otherwise |
620 | * userspace may try to stuff a 64kB packet into a 1500-byte MTU. */ | |
621 | if (skb_is_gso(skb)) { | |
9cc8b4e4 | 622 | struct sk_buff *nskb = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM); |
2d7ce2ee JG |
623 | |
624 | kfree_skb(skb); | |
625 | skb = nskb; | |
40796b34 | 626 | if (IS_ERR(skb)) { |
2d7ce2ee JG |
627 | err = PTR_ERR(skb); |
628 | goto err; | |
064af421 BP |
629 | } |
630 | } | |
631 | ||
cb5087ca | 632 | err = queue_control_packets(skb, queue, queue_no, arg); |
064af421 | 633 | wake_up_interruptible(&dp->waitqueue); |
cb5087ca | 634 | return err; |
064af421 BP |
635 | |
636 | err_kfree_skb: | |
637 | kfree_skb(skb); | |
638 | err: | |
1c075d0a JG |
639 | local_bh_disable(); |
640 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); | |
38c6ecbc JG |
641 | |
642 | write_seqcount_begin(&stats->seqlock); | |
064af421 | 643 | stats->n_lost++; |
38c6ecbc JG |
644 | write_seqcount_end(&stats->seqlock); |
645 | ||
1c075d0a | 646 | local_bh_enable(); |
064af421 BP |
647 | |
648 | return err; | |
649 | } | |
650 | ||
651 | static int flush_flows(struct datapath *dp) | |
652 | { | |
9abaf6b3 | 653 | struct tbl *old_table = get_table_protected(dp); |
8d5ebd83 JG |
654 | struct tbl *new_table; |
655 | ||
c6fadeb1 | 656 | new_table = tbl_create(TBL_MIN_BUCKETS); |
8d5ebd83 JG |
657 | if (!new_table) |
658 | return -ENOMEM; | |
659 | ||
660 | rcu_assign_pointer(dp->table, new_table); | |
661 | ||
662 | tbl_deferred_destroy(old_table, flow_free_tbl); | |
663 | ||
664 | return 0; | |
064af421 BP |
665 | } |
666 | ||
cdee00fd | 667 | static int validate_actions(const struct nlattr *actions, u32 actions_len) |
064af421 | 668 | { |
cdee00fd BP |
669 | const struct nlattr *a; |
670 | int rem; | |
671 | ||
672 | nla_for_each_attr(a, actions, actions_len, rem) { | |
673 | static const u32 action_lens[ODPAT_MAX + 1] = { | |
674 | [ODPAT_OUTPUT] = 4, | |
b9298d3f | 675 | [ODPAT_CONTROLLER] = 8, |
cdee00fd BP |
676 | [ODPAT_SET_DL_TCI] = 2, |
677 | [ODPAT_STRIP_VLAN] = 0, | |
678 | [ODPAT_SET_DL_SRC] = ETH_ALEN, | |
679 | [ODPAT_SET_DL_DST] = ETH_ALEN, | |
680 | [ODPAT_SET_NW_SRC] = 4, | |
681 | [ODPAT_SET_NW_DST] = 4, | |
682 | [ODPAT_SET_NW_TOS] = 1, | |
683 | [ODPAT_SET_TP_SRC] = 2, | |
684 | [ODPAT_SET_TP_DST] = 2, | |
b9298d3f | 685 | [ODPAT_SET_TUNNEL] = 8, |
cdee00fd BP |
686 | [ODPAT_SET_PRIORITY] = 4, |
687 | [ODPAT_POP_PRIORITY] = 0, | |
688 | [ODPAT_DROP_SPOOFED_ARP] = 0, | |
689 | }; | |
690 | int type = nla_type(a); | |
691 | ||
692 | if (type > ODPAT_MAX || nla_len(a) != action_lens[type]) | |
693 | return -EINVAL; | |
694 | ||
695 | switch (type) { | |
696 | case ODPAT_UNSPEC: | |
697 | return -EINVAL; | |
064af421 | 698 | |
cdee00fd BP |
699 | case ODPAT_CONTROLLER: |
700 | case ODPAT_STRIP_VLAN: | |
701 | case ODPAT_SET_DL_SRC: | |
702 | case ODPAT_SET_DL_DST: | |
703 | case ODPAT_SET_NW_SRC: | |
704 | case ODPAT_SET_NW_DST: | |
705 | case ODPAT_SET_TP_SRC: | |
706 | case ODPAT_SET_TP_DST: | |
707 | case ODPAT_SET_TUNNEL: | |
708 | case ODPAT_SET_PRIORITY: | |
709 | case ODPAT_POP_PRIORITY: | |
710 | case ODPAT_DROP_SPOOFED_ARP: | |
711 | /* No validation needed. */ | |
712 | break; | |
713 | ||
714 | case ODPAT_OUTPUT: | |
715 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
716 | return -EINVAL; | |
717 | ||
718 | case ODPAT_SET_DL_TCI: | |
719 | if (nla_get_be16(a) & htons(VLAN_CFI_MASK)) | |
064af421 | 720 | return -EINVAL; |
cdee00fd | 721 | break; |
064af421 | 722 | |
cdee00fd BP |
723 | case ODPAT_SET_NW_TOS: |
724 | if (nla_get_u8(a) & INET_ECN_MASK) | |
725 | return -EINVAL; | |
726 | break; | |
064af421 | 727 | |
cdee00fd BP |
728 | default: |
729 | return -EOPNOTSUPP; | |
730 | } | |
731 | } | |
3c5f6de3 | 732 | |
cdee00fd BP |
733 | if (rem > 0) |
734 | return -EINVAL; | |
064af421 | 735 | |
cdee00fd | 736 | return 0; |
064af421 BP |
737 | } |
738 | ||
739 | static struct sw_flow_actions *get_actions(const struct odp_flow *flow) | |
740 | { | |
741 | struct sw_flow_actions *actions; | |
742 | int error; | |
743 | ||
cdee00fd | 744 | actions = flow_actions_alloc(flow->actions_len); |
064af421 BP |
745 | error = PTR_ERR(actions); |
746 | if (IS_ERR(actions)) | |
747 | goto error; | |
748 | ||
749 | error = -EFAULT; | |
1b29ebe5 | 750 | if (copy_from_user(actions->actions, |
6c229737 | 751 | (struct nlattr __user __force *)flow->actions, |
1b29ebe5 | 752 | flow->actions_len)) |
064af421 | 753 | goto error_free_actions; |
cdee00fd | 754 | error = validate_actions(actions->actions, actions->actions_len); |
064af421 BP |
755 | if (error) |
756 | goto error_free_actions; | |
757 | ||
758 | return actions; | |
759 | ||
760 | error_free_actions: | |
761 | kfree(actions); | |
762 | error: | |
763 | return ERR_PTR(error); | |
764 | } | |
765 | ||
65d042a1 | 766 | static void get_stats(struct sw_flow *flow, struct odp_flow_stats *stats) |
6bfafa55 JG |
767 | { |
768 | if (flow->used) { | |
65d042a1 | 769 | struct timespec offset_ts, used, now_mono; |
6bfafa55 | 770 | |
65d042a1 HZ |
771 | ktime_get_ts(&now_mono); |
772 | jiffies_to_timespec(jiffies - flow->used, &offset_ts); | |
773 | set_normalized_timespec(&used, now_mono.tv_sec - offset_ts.tv_sec, | |
774 | now_mono.tv_nsec - offset_ts.tv_nsec); | |
6bfafa55 JG |
775 | |
776 | stats->used_sec = used.tv_sec; | |
777 | stats->used_nsec = used.tv_nsec; | |
064af421 BP |
778 | } else { |
779 | stats->used_sec = 0; | |
780 | stats->used_nsec = 0; | |
781 | } | |
6bfafa55 | 782 | |
064af421 BP |
783 | stats->n_packets = flow->packet_count; |
784 | stats->n_bytes = flow->byte_count; | |
abfec865 | 785 | stats->reserved = 0; |
064af421 | 786 | stats->tcp_flags = flow->tcp_flags; |
f1aa2072 | 787 | stats->error = 0; |
064af421 BP |
788 | } |
789 | ||
790 | static void clear_stats(struct sw_flow *flow) | |
791 | { | |
6bfafa55 | 792 | flow->used = 0; |
064af421 | 793 | flow->tcp_flags = 0; |
064af421 BP |
794 | flow->packet_count = 0; |
795 | flow->byte_count = 0; | |
796 | } | |
797 | ||
8d5ebd83 JG |
798 | static int expand_table(struct datapath *dp) |
799 | { | |
9abaf6b3 | 800 | struct tbl *old_table = get_table_protected(dp); |
8d5ebd83 JG |
801 | struct tbl *new_table; |
802 | ||
803 | new_table = tbl_expand(old_table); | |
804 | if (IS_ERR(new_table)) | |
805 | return PTR_ERR(new_table); | |
806 | ||
807 | rcu_assign_pointer(dp->table, new_table); | |
808 | tbl_deferred_destroy(old_table, NULL); | |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
44e05eca BP |
813 | static int do_put_flow(struct datapath *dp, struct odp_flow_put *uf, |
814 | struct odp_flow_stats *stats) | |
064af421 | 815 | { |
8d5ebd83 | 816 | struct tbl_node *flow_node; |
6fa58f7a | 817 | struct sw_flow *flow; |
8d5ebd83 | 818 | struct tbl *table; |
064af421 | 819 | int error; |
58f8f0e7 | 820 | u32 hash; |
064af421 | 821 | |
58f8f0e7 | 822 | hash = flow_hash(&uf->flow.key); |
9abaf6b3 | 823 | table = get_table_protected(dp); |
58f8f0e7 | 824 | flow_node = tbl_lookup(table, &uf->flow.key, hash, flow_cmp); |
8d5ebd83 | 825 | if (!flow_node) { |
6fa58f7a | 826 | /* No such flow. */ |
064af421 BP |
827 | struct sw_flow_actions *acts; |
828 | ||
829 | error = -ENOENT; | |
44e05eca | 830 | if (!(uf->flags & ODPPF_CREATE)) |
064af421 BP |
831 | goto error; |
832 | ||
833 | /* Expand table, if necessary, to make room. */ | |
8d5ebd83 JG |
834 | if (tbl_count(table) >= tbl_n_buckets(table)) { |
835 | error = expand_table(dp); | |
064af421 BP |
836 | if (error) |
837 | goto error; | |
9abaf6b3 | 838 | table = get_table_protected(dp); |
064af421 BP |
839 | } |
840 | ||
841 | /* Allocate flow. */ | |
560e8022 JG |
842 | flow = flow_alloc(); |
843 | if (IS_ERR(flow)) { | |
844 | error = PTR_ERR(flow); | |
064af421 | 845 | goto error; |
560e8022 | 846 | } |
44e05eca | 847 | flow->key = uf->flow.key; |
064af421 BP |
848 | clear_stats(flow); |
849 | ||
850 | /* Obtain actions. */ | |
44e05eca | 851 | acts = get_actions(&uf->flow); |
064af421 BP |
852 | error = PTR_ERR(acts); |
853 | if (IS_ERR(acts)) | |
854 | goto error_free_flow; | |
855 | rcu_assign_pointer(flow->sf_acts, acts); | |
856 | ||
857 | /* Put flow in bucket. */ | |
58f8f0e7 | 858 | error = tbl_insert(table, &flow->tbl_node, hash); |
6fa58f7a BP |
859 | if (error) |
860 | goto error_free_flow_acts; | |
8d5ebd83 | 861 | |
44e05eca | 862 | memset(stats, 0, sizeof(struct odp_flow_stats)); |
064af421 BP |
863 | } else { |
864 | /* We found a matching flow. */ | |
064af421 | 865 | struct sw_flow_actions *old_acts, *new_acts; |
064af421 | 866 | |
8d5ebd83 JG |
867 | flow = flow_cast(flow_node); |
868 | ||
064af421 BP |
869 | /* Bail out if we're not allowed to modify an existing flow. */ |
870 | error = -EEXIST; | |
44e05eca | 871 | if (!(uf->flags & ODPPF_MODIFY)) |
064af421 BP |
872 | goto error; |
873 | ||
874 | /* Swap actions. */ | |
44e05eca | 875 | new_acts = get_actions(&uf->flow); |
064af421 BP |
876 | error = PTR_ERR(new_acts); |
877 | if (IS_ERR(new_acts)) | |
878 | goto error; | |
d3c54451 JG |
879 | |
880 | old_acts = rcu_dereference_protected(flow->sf_acts, | |
881 | lockdep_is_held(&dp->mutex)); | |
cdee00fd | 882 | if (old_acts->actions_len != new_acts->actions_len || |
064af421 | 883 | memcmp(old_acts->actions, new_acts->actions, |
cdee00fd | 884 | old_acts->actions_len)) { |
064af421 BP |
885 | rcu_assign_pointer(flow->sf_acts, new_acts); |
886 | flow_deferred_free_acts(old_acts); | |
887 | } else { | |
888 | kfree(new_acts); | |
889 | } | |
890 | ||
891 | /* Fetch stats, then clear them if necessary. */ | |
1d7241c7 | 892 | spin_lock_bh(&flow->lock); |
65d042a1 | 893 | get_stats(flow, stats); |
44e05eca | 894 | if (uf->flags & ODPPF_ZERO_STATS) |
064af421 | 895 | clear_stats(flow); |
1d7241c7 | 896 | spin_unlock_bh(&flow->lock); |
064af421 BP |
897 | } |
898 | ||
064af421 BP |
899 | return 0; |
900 | ||
6fa58f7a BP |
901 | error_free_flow_acts: |
902 | kfree(flow->sf_acts); | |
064af421 | 903 | error_free_flow: |
fb8c9347 JG |
904 | flow->sf_acts = NULL; |
905 | flow_put(flow); | |
064af421 BP |
906 | error: |
907 | return error; | |
908 | } | |
909 | ||
44e05eca BP |
910 | static int put_flow(struct datapath *dp, struct odp_flow_put __user *ufp) |
911 | { | |
912 | struct odp_flow_stats stats; | |
913 | struct odp_flow_put uf; | |
914 | int error; | |
915 | ||
916 | if (copy_from_user(&uf, ufp, sizeof(struct odp_flow_put))) | |
917 | return -EFAULT; | |
918 | ||
919 | error = do_put_flow(dp, &uf, &stats); | |
920 | if (error) | |
921 | return error; | |
922 | ||
776f10ce BP |
923 | if (copy_to_user(&ufp->flow.stats, &stats, |
924 | sizeof(struct odp_flow_stats))) | |
44e05eca BP |
925 | return -EFAULT; |
926 | ||
927 | return 0; | |
928 | } | |
929 | ||
d3c54451 JG |
930 | static int do_answer_query(struct datapath *dp, struct sw_flow *flow, |
931 | u32 query_flags, | |
44e05eca | 932 | struct odp_flow_stats __user *ustats, |
cdee00fd BP |
933 | struct nlattr __user *actions, |
934 | u32 __user *actions_lenp) | |
064af421 | 935 | { |
064af421 | 936 | struct sw_flow_actions *sf_acts; |
44e05eca | 937 | struct odp_flow_stats stats; |
cdee00fd | 938 | u32 actions_len; |
064af421 | 939 | |
1d7241c7 | 940 | spin_lock_bh(&flow->lock); |
65d042a1 | 941 | get_stats(flow, &stats); |
1d7241c7 | 942 | if (query_flags & ODPFF_ZERO_TCP_FLAGS) |
44e05eca | 943 | flow->tcp_flags = 0; |
1d7241c7 JG |
944 | |
945 | spin_unlock_bh(&flow->lock); | |
44e05eca | 946 | |
776f10ce | 947 | if (copy_to_user(ustats, &stats, sizeof(struct odp_flow_stats)) || |
cdee00fd | 948 | get_user(actions_len, actions_lenp)) |
064af421 BP |
949 | return -EFAULT; |
950 | ||
cdee00fd | 951 | if (!actions_len) |
064af421 | 952 | return 0; |
064af421 | 953 | |
d3c54451 JG |
954 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
955 | lockdep_is_held(&dp->mutex)); | |
cdee00fd | 956 | if (put_user(sf_acts->actions_len, actions_lenp) || |
064af421 | 957 | (actions && copy_to_user(actions, sf_acts->actions, |
cdee00fd | 958 | min(sf_acts->actions_len, actions_len)))) |
064af421 BP |
959 | return -EFAULT; |
960 | ||
961 | return 0; | |
962 | } | |
963 | ||
d3c54451 JG |
964 | static int answer_query(struct datapath *dp, struct sw_flow *flow, |
965 | u32 query_flags, struct odp_flow __user *ufp) | |
064af421 | 966 | { |
1b29ebe5 | 967 | struct nlattr __user *actions; |
064af421 | 968 | |
1b29ebe5 | 969 | if (get_user(actions, (struct nlattr __user * __user *)&ufp->actions)) |
064af421 | 970 | return -EFAULT; |
44e05eca | 971 | |
d3c54451 | 972 | return do_answer_query(dp, flow, query_flags, |
cdee00fd | 973 | &ufp->stats, actions, &ufp->actions_len); |
064af421 BP |
974 | } |
975 | ||
44e05eca | 976 | static struct sw_flow *do_del_flow(struct datapath *dp, struct odp_flow_key *key) |
064af421 | 977 | { |
9abaf6b3 | 978 | struct tbl *table = get_table_protected(dp); |
8d5ebd83 | 979 | struct tbl_node *flow_node; |
064af421 BP |
980 | int error; |
981 | ||
44e05eca | 982 | flow_node = tbl_lookup(table, key, flow_hash(key), flow_cmp); |
8d5ebd83 | 983 | if (!flow_node) |
44e05eca | 984 | return ERR_PTR(-ENOENT); |
064af421 | 985 | |
8d5ebd83 | 986 | error = tbl_remove(table, flow_node); |
f1aa2072 | 987 | if (error) |
44e05eca | 988 | return ERR_PTR(error); |
064af421 | 989 | |
44e05eca BP |
990 | /* XXX Returned flow_node's statistics might lose a few packets, since |
991 | * other CPUs can be using this flow. We used to synchronize_rcu() to | |
992 | * make sure that we get completely accurate stats, but that blows our | |
993 | * performance, badly. */ | |
994 | return flow_cast(flow_node); | |
995 | } | |
996 | ||
997 | static int del_flow(struct datapath *dp, struct odp_flow __user *ufp) | |
998 | { | |
999 | struct sw_flow *flow; | |
1000 | struct odp_flow uf; | |
1001 | int error; | |
1002 | ||
1003 | if (copy_from_user(&uf, ufp, sizeof uf)) | |
1004 | return -EFAULT; | |
1005 | ||
1006 | flow = do_del_flow(dp, &uf.key); | |
1007 | if (IS_ERR(flow)) | |
1008 | return PTR_ERR(flow); | |
8d5ebd83 | 1009 | |
d3c54451 | 1010 | error = answer_query(dp, flow, 0, ufp); |
f1aa2072 | 1011 | flow_deferred_free(flow); |
064af421 BP |
1012 | return error; |
1013 | } | |
1014 | ||
44e05eca | 1015 | static int do_query_flows(struct datapath *dp, const struct odp_flowvec *flowvec) |
064af421 | 1016 | { |
9abaf6b3 | 1017 | struct tbl *table = get_table_protected(dp); |
6d7568dc BP |
1018 | u32 i; |
1019 | ||
064af421 | 1020 | for (i = 0; i < flowvec->n_flows; i++) { |
6c229737 | 1021 | struct odp_flow __user *ufp = (struct odp_flow __user __force *)&flowvec->flows[i]; |
064af421 | 1022 | struct odp_flow uf; |
8d5ebd83 | 1023 | struct tbl_node *flow_node; |
064af421 BP |
1024 | int error; |
1025 | ||
776f10ce | 1026 | if (copy_from_user(&uf, ufp, sizeof uf)) |
064af421 | 1027 | return -EFAULT; |
064af421 | 1028 | |
8d5ebd83 JG |
1029 | flow_node = tbl_lookup(table, &uf.key, flow_hash(&uf.key), flow_cmp); |
1030 | if (!flow_node) | |
776f10ce | 1031 | error = put_user(ENOENT, &ufp->stats.error); |
064af421 | 1032 | else |
d3c54451 | 1033 | error = answer_query(dp, flow_cast(flow_node), uf.flags, ufp); |
064af421 BP |
1034 | if (error) |
1035 | return -EFAULT; | |
1036 | } | |
1037 | return flowvec->n_flows; | |
1038 | } | |
1039 | ||
1040 | struct list_flows_cbdata { | |
d3c54451 | 1041 | struct datapath *dp; |
064af421 | 1042 | struct odp_flow __user *uflows; |
6d7568dc BP |
1043 | u32 n_flows; |
1044 | u32 listed_flows; | |
064af421 BP |
1045 | }; |
1046 | ||
8d5ebd83 | 1047 | static int list_flow(struct tbl_node *node, void *cbdata_) |
064af421 | 1048 | { |
8d5ebd83 | 1049 | struct sw_flow *flow = flow_cast(node); |
064af421 BP |
1050 | struct list_flows_cbdata *cbdata = cbdata_; |
1051 | struct odp_flow __user *ufp = &cbdata->uflows[cbdata->listed_flows++]; | |
1052 | int error; | |
1053 | ||
776f10ce | 1054 | if (copy_to_user(&ufp->key, &flow->key, sizeof flow->key)) |
064af421 | 1055 | return -EFAULT; |
d3c54451 | 1056 | error = answer_query(cbdata->dp, flow, 0, ufp); |
064af421 BP |
1057 | if (error) |
1058 | return error; | |
1059 | ||
1060 | if (cbdata->listed_flows >= cbdata->n_flows) | |
1061 | return cbdata->listed_flows; | |
1062 | return 0; | |
1063 | } | |
1064 | ||
44e05eca | 1065 | static int do_list_flows(struct datapath *dp, const struct odp_flowvec *flowvec) |
064af421 BP |
1066 | { |
1067 | struct list_flows_cbdata cbdata; | |
1068 | int error; | |
1069 | ||
1070 | if (!flowvec->n_flows) | |
1071 | return 0; | |
1072 | ||
d3c54451 | 1073 | cbdata.dp = dp; |
6c229737 | 1074 | cbdata.uflows = (struct odp_flow __user __force*)flowvec->flows; |
064af421 BP |
1075 | cbdata.n_flows = flowvec->n_flows; |
1076 | cbdata.listed_flows = 0; | |
6bfafa55 | 1077 | |
9abaf6b3 | 1078 | error = tbl_foreach(get_table_protected(dp), list_flow, &cbdata); |
064af421 BP |
1079 | return error ? error : cbdata.listed_flows; |
1080 | } | |
1081 | ||
1082 | static int do_flowvec_ioctl(struct datapath *dp, unsigned long argp, | |
1083 | int (*function)(struct datapath *, | |
1084 | const struct odp_flowvec *)) | |
1085 | { | |
1086 | struct odp_flowvec __user *uflowvec; | |
1087 | struct odp_flowvec flowvec; | |
1088 | int retval; | |
1089 | ||
1090 | uflowvec = (struct odp_flowvec __user *)argp; | |
776f10ce | 1091 | if (copy_from_user(&flowvec, uflowvec, sizeof flowvec)) |
064af421 BP |
1092 | return -EFAULT; |
1093 | ||
1094 | if (flowvec.n_flows > INT_MAX / sizeof(struct odp_flow)) | |
1095 | return -EINVAL; | |
1096 | ||
064af421 BP |
1097 | retval = function(dp, &flowvec); |
1098 | return (retval < 0 ? retval | |
1099 | : retval == flowvec.n_flows ? 0 | |
776f10ce | 1100 | : put_user(retval, &uflowvec->n_flows)); |
064af421 BP |
1101 | } |
1102 | ||
44e05eca | 1103 | static int do_execute(struct datapath *dp, const struct odp_execute *execute) |
064af421 | 1104 | { |
064af421 BP |
1105 | struct odp_flow_key key; |
1106 | struct sk_buff *skb; | |
1107 | struct sw_flow_actions *actions; | |
a393b897 | 1108 | struct ethhdr *eth; |
b7a31ec1 | 1109 | bool is_frag; |
064af421 BP |
1110 | int err; |
1111 | ||
064af421 | 1112 | err = -EINVAL; |
44e05eca | 1113 | if (execute->length < ETH_HLEN || execute->length > 65535) |
064af421 BP |
1114 | goto error; |
1115 | ||
cdee00fd | 1116 | actions = flow_actions_alloc(execute->actions_len); |
8ba1fd2f JG |
1117 | if (IS_ERR(actions)) { |
1118 | err = PTR_ERR(actions); | |
064af421 | 1119 | goto error; |
8ba1fd2f | 1120 | } |
064af421 BP |
1121 | |
1122 | err = -EFAULT; | |
1b29ebe5 | 1123 | if (copy_from_user(actions->actions, |
6c229737 | 1124 | (struct nlattr __user __force *)execute->actions, execute->actions_len)) |
064af421 BP |
1125 | goto error_free_actions; |
1126 | ||
cdee00fd | 1127 | err = validate_actions(actions->actions, execute->actions_len); |
064af421 BP |
1128 | if (err) |
1129 | goto error_free_actions; | |
1130 | ||
1131 | err = -ENOMEM; | |
44e05eca | 1132 | skb = alloc_skb(execute->length, GFP_KERNEL); |
064af421 BP |
1133 | if (!skb) |
1134 | goto error_free_actions; | |
659586ef | 1135 | |
064af421 | 1136 | err = -EFAULT; |
1b29ebe5 | 1137 | if (copy_from_user(skb_put(skb, execute->length), |
6c229737 | 1138 | (const void __user __force *)execute->data, |
44e05eca | 1139 | execute->length)) |
064af421 BP |
1140 | goto error_free_skb; |
1141 | ||
a393b897 JP |
1142 | skb_reset_mac_header(skb); |
1143 | eth = eth_hdr(skb); | |
1144 | ||
de3f65ea JP |
1145 | /* Normally, setting the skb 'protocol' field would be handled by a |
1146 | * call to eth_type_trans(), but it assumes there's a sending | |
1147 | * device, which we may not have. */ | |
a393b897 JP |
1148 | if (ntohs(eth->h_proto) >= 1536) |
1149 | skb->protocol = eth->h_proto; | |
1150 | else | |
1151 | skb->protocol = htons(ETH_P_802_2); | |
1152 | ||
f1588b1f | 1153 | err = flow_extract(skb, -1, &key, &is_frag); |
4c1ad233 BP |
1154 | if (err) |
1155 | goto error_free_skb; | |
9dca7bd5 JG |
1156 | |
1157 | rcu_read_lock(); | |
cdee00fd | 1158 | err = execute_actions(dp, skb, &key, actions->actions, actions->actions_len); |
9dca7bd5 JG |
1159 | rcu_read_unlock(); |
1160 | ||
064af421 BP |
1161 | kfree(actions); |
1162 | return err; | |
1163 | ||
1164 | error_free_skb: | |
1165 | kfree_skb(skb); | |
1166 | error_free_actions: | |
1167 | kfree(actions); | |
1168 | error: | |
1169 | return err; | |
1170 | } | |
1171 | ||
44e05eca BP |
1172 | static int execute_packet(struct datapath *dp, const struct odp_execute __user *executep) |
1173 | { | |
1174 | struct odp_execute execute; | |
1175 | ||
1176 | if (copy_from_user(&execute, executep, sizeof execute)) | |
1177 | return -EFAULT; | |
1178 | ||
1179 | return do_execute(dp, &execute); | |
1180 | } | |
1181 | ||
16190191 | 1182 | static int get_dp_stats(struct datapath *dp, struct odp_stats __user *statsp) |
064af421 | 1183 | { |
9abaf6b3 | 1184 | struct tbl *table = get_table_protected(dp); |
064af421 BP |
1185 | struct odp_stats stats; |
1186 | int i; | |
1187 | ||
8d5ebd83 JG |
1188 | stats.n_flows = tbl_count(table); |
1189 | stats.cur_capacity = tbl_n_buckets(table); | |
1190 | stats.max_capacity = TBL_MAX_BUCKETS; | |
064af421 BP |
1191 | stats.n_ports = dp->n_ports; |
1192 | stats.max_ports = DP_MAX_PORTS; | |
064af421 BP |
1193 | stats.n_frags = stats.n_hit = stats.n_missed = stats.n_lost = 0; |
1194 | for_each_possible_cpu(i) { | |
38c6ecbc JG |
1195 | const struct dp_stats_percpu *percpu_stats; |
1196 | struct dp_stats_percpu local_stats; | |
1197 | unsigned seqcount; | |
1198 | ||
1199 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
1200 | ||
1201 | do { | |
1202 | seqcount = read_seqcount_begin(&percpu_stats->seqlock); | |
1203 | local_stats = *percpu_stats; | |
1204 | } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount)); | |
1205 | ||
1206 | stats.n_frags += local_stats.n_frags; | |
1207 | stats.n_hit += local_stats.n_hit; | |
1208 | stats.n_missed += local_stats.n_missed; | |
1209 | stats.n_lost += local_stats.n_lost; | |
064af421 BP |
1210 | } |
1211 | stats.max_miss_queue = DP_MAX_QUEUE_LEN; | |
1212 | stats.max_action_queue = DP_MAX_QUEUE_LEN; | |
1213 | return copy_to_user(statsp, &stats, sizeof stats) ? -EFAULT : 0; | |
1214 | } | |
1215 | ||
1dcf111b JP |
1216 | /* MTU of the dp pseudo-device: ETH_DATA_LEN or the minimum of the ports */ |
1217 | int dp_min_mtu(const struct datapath *dp) | |
1218 | { | |
e779d8d9 | 1219 | struct vport *p; |
1dcf111b JP |
1220 | int mtu = 0; |
1221 | ||
1222 | ASSERT_RTNL(); | |
1223 | ||
1224 | list_for_each_entry_rcu (p, &dp->port_list, node) { | |
f2459fe7 | 1225 | int dev_mtu; |
1dcf111b JP |
1226 | |
1227 | /* Skip any internal ports, since that's what we're trying to | |
1228 | * set. */ | |
e779d8d9 | 1229 | if (is_internal_vport(p)) |
1dcf111b JP |
1230 | continue; |
1231 | ||
e779d8d9 | 1232 | dev_mtu = vport_get_mtu(p); |
f2459fe7 JG |
1233 | if (!mtu || dev_mtu < mtu) |
1234 | mtu = dev_mtu; | |
1dcf111b JP |
1235 | } |
1236 | ||
1237 | return mtu ? mtu : ETH_DATA_LEN; | |
1238 | } | |
1239 | ||
f2459fe7 | 1240 | /* Sets the MTU of all datapath devices to the minimum of the ports. Must |
d8b5d43a | 1241 | * be called with RTNL lock. */ |
f2459fe7 | 1242 | void set_internal_devs_mtu(const struct datapath *dp) |
a7786963 | 1243 | { |
e779d8d9 | 1244 | struct vport *p; |
a7786963 JG |
1245 | int mtu; |
1246 | ||
1247 | ASSERT_RTNL(); | |
1248 | ||
a7786963 JG |
1249 | mtu = dp_min_mtu(dp); |
1250 | ||
1251 | list_for_each_entry_rcu (p, &dp->port_list, node) { | |
e779d8d9 BP |
1252 | if (is_internal_vport(p)) |
1253 | vport_set_mtu(p, mtu); | |
a7786963 JG |
1254 | } |
1255 | } | |
1256 | ||
e779d8d9 | 1257 | static int put_port(const struct vport *p, struct odp_port __user *uop) |
064af421 BP |
1258 | { |
1259 | struct odp_port op; | |
f2459fe7 | 1260 | |
064af421 | 1261 | memset(&op, 0, sizeof op); |
f2459fe7 JG |
1262 | |
1263 | rcu_read_lock(); | |
e779d8d9 BP |
1264 | strncpy(op.devname, vport_get_name(p), sizeof op.devname); |
1265 | strncpy(op.type, vport_get_type(p), sizeof op.type); | |
dd851cbb | 1266 | vport_get_config(p, op.config); |
f2459fe7 JG |
1267 | rcu_read_unlock(); |
1268 | ||
064af421 | 1269 | op.port = p->port_no; |
f2459fe7 | 1270 | |
064af421 BP |
1271 | return copy_to_user(uop, &op, sizeof op) ? -EFAULT : 0; |
1272 | } | |
1273 | ||
fceb2a5b | 1274 | static int query_port(struct datapath *dp, struct odp_port __user *uport) |
064af421 BP |
1275 | { |
1276 | struct odp_port port; | |
1277 | ||
1278 | if (copy_from_user(&port, uport, sizeof port)) | |
1279 | return -EFAULT; | |
f2459fe7 | 1280 | |
064af421 | 1281 | if (port.devname[0]) { |
f2459fe7 | 1282 | struct vport *vport; |
f2459fe7 | 1283 | int err = 0; |
064af421 BP |
1284 | |
1285 | port.devname[IFNAMSIZ - 1] = '\0'; | |
1286 | ||
f2459fe7 JG |
1287 | vport_lock(); |
1288 | rcu_read_lock(); | |
064af421 | 1289 | |
f2459fe7 JG |
1290 | vport = vport_locate(port.devname); |
1291 | if (!vport) { | |
1292 | err = -ENODEV; | |
1293 | goto error_unlock; | |
064af421 | 1294 | } |
e779d8d9 | 1295 | if (vport->dp != dp) { |
f2459fe7 JG |
1296 | err = -ENOENT; |
1297 | goto error_unlock; | |
1298 | } | |
1299 | ||
e779d8d9 | 1300 | port.port = vport->port_no; |
f2459fe7 JG |
1301 | |
1302 | error_unlock: | |
1303 | rcu_read_unlock(); | |
1304 | vport_unlock(); | |
1305 | ||
1306 | if (err) | |
1307 | return err; | |
064af421 BP |
1308 | } else { |
1309 | if (port.port >= DP_MAX_PORTS) | |
1310 | return -EINVAL; | |
1311 | if (!dp->ports[port.port]) | |
1312 | return -ENOENT; | |
064af421 | 1313 | } |
f2459fe7 JG |
1314 | |
1315 | return put_port(dp->ports[port.port], uport); | |
064af421 BP |
1316 | } |
1317 | ||
fceb2a5b JG |
1318 | static int do_list_ports(struct datapath *dp, struct odp_port __user *uports, |
1319 | int n_ports) | |
064af421 | 1320 | { |
44e05eca BP |
1321 | int idx = 0; |
1322 | if (n_ports) { | |
e779d8d9 | 1323 | struct vport *p; |
064af421 | 1324 | |
064af421 | 1325 | list_for_each_entry_rcu (p, &dp->port_list, node) { |
44e05eca | 1326 | if (put_port(p, &uports[idx])) |
064af421 | 1327 | return -EFAULT; |
44e05eca | 1328 | if (idx++ >= n_ports) |
064af421 BP |
1329 | break; |
1330 | } | |
1331 | } | |
44e05eca BP |
1332 | return idx; |
1333 | } | |
1334 | ||
fceb2a5b | 1335 | static int list_ports(struct datapath *dp, struct odp_portvec __user *upv) |
44e05eca BP |
1336 | { |
1337 | struct odp_portvec pv; | |
1338 | int retval; | |
1339 | ||
1340 | if (copy_from_user(&pv, upv, sizeof pv)) | |
1341 | return -EFAULT; | |
1342 | ||
6c229737 | 1343 | retval = do_list_ports(dp, (struct odp_port __user __force *)pv.ports, |
1b29ebe5 | 1344 | pv.n_ports); |
44e05eca BP |
1345 | if (retval < 0) |
1346 | return retval; | |
1347 | ||
1348 | return put_user(retval, &upv->n_ports); | |
064af421 BP |
1349 | } |
1350 | ||
7c40efc9 BP |
1351 | static int get_listen_mask(const struct file *f) |
1352 | { | |
1353 | return (long)f->private_data; | |
1354 | } | |
1355 | ||
1356 | static void set_listen_mask(struct file *f, int listen_mask) | |
1357 | { | |
1358 | f->private_data = (void*)(long)listen_mask; | |
1359 | } | |
1360 | ||
064af421 BP |
1361 | static long openvswitch_ioctl(struct file *f, unsigned int cmd, |
1362 | unsigned long argp) | |
1363 | { | |
1364 | int dp_idx = iminor(f->f_dentry->d_inode); | |
1365 | struct datapath *dp; | |
1366 | int drop_frags, listeners, port_no; | |
72b06300 | 1367 | unsigned int sflow_probability; |
064af421 BP |
1368 | int err; |
1369 | ||
1370 | /* Handle commands with special locking requirements up front. */ | |
1371 | switch (cmd) { | |
1372 | case ODP_DP_CREATE: | |
e86c8696 BP |
1373 | err = create_dp(dp_idx, (char __user *)argp); |
1374 | goto exit; | |
064af421 BP |
1375 | |
1376 | case ODP_DP_DESTROY: | |
e86c8696 BP |
1377 | err = destroy_dp(dp_idx); |
1378 | goto exit; | |
064af421 | 1379 | |
c3827f61 | 1380 | case ODP_VPORT_ATTACH: |
f2459fe7 | 1381 | err = attach_port(dp_idx, (struct odp_port __user *)argp); |
e86c8696 | 1382 | goto exit; |
064af421 | 1383 | |
c3827f61 | 1384 | case ODP_VPORT_DETACH: |
064af421 | 1385 | err = get_user(port_no, (int __user *)argp); |
e86c8696 | 1386 | if (!err) |
f2459fe7 JG |
1387 | err = detach_port(dp_idx, port_no); |
1388 | goto exit; | |
1389 | ||
f2459fe7 | 1390 | case ODP_VPORT_MOD: |
c3827f61 | 1391 | err = vport_user_mod((struct odp_port __user *)argp); |
f2459fe7 JG |
1392 | goto exit; |
1393 | ||
1394 | case ODP_VPORT_STATS_GET: | |
61e89cd6 | 1395 | err = vport_user_stats_get((struct odp_vport_stats_req __user *)argp); |
f2459fe7 JG |
1396 | goto exit; |
1397 | ||
780e6207 JG |
1398 | case ODP_VPORT_STATS_SET: |
1399 | err = vport_user_stats_set((struct odp_vport_stats_req __user *)argp); | |
1400 | goto exit; | |
1401 | ||
f2459fe7 | 1402 | case ODP_VPORT_ETHER_GET: |
61e89cd6 | 1403 | err = vport_user_ether_get((struct odp_vport_ether __user *)argp); |
f2459fe7 JG |
1404 | goto exit; |
1405 | ||
1406 | case ODP_VPORT_ETHER_SET: | |
61e89cd6 | 1407 | err = vport_user_ether_set((struct odp_vport_ether __user *)argp); |
f2459fe7 JG |
1408 | goto exit; |
1409 | ||
1410 | case ODP_VPORT_MTU_GET: | |
61e89cd6 | 1411 | err = vport_user_mtu_get((struct odp_vport_mtu __user *)argp); |
f2459fe7 JG |
1412 | goto exit; |
1413 | ||
1414 | case ODP_VPORT_MTU_SET: | |
61e89cd6 | 1415 | err = vport_user_mtu_set((struct odp_vport_mtu __user *)argp); |
e86c8696 | 1416 | goto exit; |
064af421 BP |
1417 | } |
1418 | ||
1419 | dp = get_dp_locked(dp_idx); | |
e86c8696 | 1420 | err = -ENODEV; |
064af421 | 1421 | if (!dp) |
e86c8696 | 1422 | goto exit; |
064af421 BP |
1423 | |
1424 | switch (cmd) { | |
1425 | case ODP_DP_STATS: | |
1426 | err = get_dp_stats(dp, (struct odp_stats __user *)argp); | |
1427 | break; | |
1428 | ||
1429 | case ODP_GET_DROP_FRAGS: | |
1430 | err = put_user(dp->drop_frags, (int __user *)argp); | |
1431 | break; | |
1432 | ||
1433 | case ODP_SET_DROP_FRAGS: | |
1434 | err = get_user(drop_frags, (int __user *)argp); | |
1435 | if (err) | |
1436 | break; | |
1437 | err = -EINVAL; | |
1438 | if (drop_frags != 0 && drop_frags != 1) | |
1439 | break; | |
1440 | dp->drop_frags = drop_frags; | |
1441 | err = 0; | |
1442 | break; | |
1443 | ||
1444 | case ODP_GET_LISTEN_MASK: | |
7c40efc9 | 1445 | err = put_user(get_listen_mask(f), (int __user *)argp); |
064af421 BP |
1446 | break; |
1447 | ||
1448 | case ODP_SET_LISTEN_MASK: | |
1449 | err = get_user(listeners, (int __user *)argp); | |
1450 | if (err) | |
1451 | break; | |
1452 | err = -EINVAL; | |
1453 | if (listeners & ~ODPL_ALL) | |
1454 | break; | |
1455 | err = 0; | |
7c40efc9 | 1456 | set_listen_mask(f, listeners); |
064af421 BP |
1457 | break; |
1458 | ||
72b06300 BP |
1459 | case ODP_GET_SFLOW_PROBABILITY: |
1460 | err = put_user(dp->sflow_probability, (unsigned int __user *)argp); | |
1461 | break; | |
1462 | ||
1463 | case ODP_SET_SFLOW_PROBABILITY: | |
1464 | err = get_user(sflow_probability, (unsigned int __user *)argp); | |
1465 | if (!err) | |
1466 | dp->sflow_probability = sflow_probability; | |
1467 | break; | |
1468 | ||
c3827f61 | 1469 | case ODP_VPORT_QUERY: |
064af421 BP |
1470 | err = query_port(dp, (struct odp_port __user *)argp); |
1471 | break; | |
1472 | ||
c3827f61 | 1473 | case ODP_VPORT_LIST: |
064af421 BP |
1474 | err = list_ports(dp, (struct odp_portvec __user *)argp); |
1475 | break; | |
1476 | ||
064af421 BP |
1477 | case ODP_FLOW_FLUSH: |
1478 | err = flush_flows(dp); | |
1479 | break; | |
1480 | ||
1481 | case ODP_FLOW_PUT: | |
1482 | err = put_flow(dp, (struct odp_flow_put __user *)argp); | |
1483 | break; | |
1484 | ||
1485 | case ODP_FLOW_DEL: | |
f1aa2072 | 1486 | err = del_flow(dp, (struct odp_flow __user *)argp); |
064af421 BP |
1487 | break; |
1488 | ||
f1aa2072 | 1489 | case ODP_FLOW_GET: |
44e05eca | 1490 | err = do_flowvec_ioctl(dp, argp, do_query_flows); |
064af421 BP |
1491 | break; |
1492 | ||
1493 | case ODP_FLOW_LIST: | |
44e05eca | 1494 | err = do_flowvec_ioctl(dp, argp, do_list_flows); |
064af421 BP |
1495 | break; |
1496 | ||
1497 | case ODP_EXECUTE: | |
44e05eca | 1498 | err = execute_packet(dp, (struct odp_execute __user *)argp); |
064af421 BP |
1499 | break; |
1500 | ||
1501 | default: | |
1502 | err = -ENOIOCTLCMD; | |
1503 | break; | |
1504 | } | |
1505 | mutex_unlock(&dp->mutex); | |
e86c8696 | 1506 | exit: |
064af421 BP |
1507 | return err; |
1508 | } | |
1509 | ||
1510 | static int dp_has_packet_of_interest(struct datapath *dp, int listeners) | |
1511 | { | |
1512 | int i; | |
1513 | for (i = 0; i < DP_N_QUEUES; i++) { | |
1514 | if (listeners & (1 << i) && !skb_queue_empty(&dp->queues[i])) | |
1515 | return 1; | |
1516 | } | |
1517 | return 0; | |
1518 | } | |
1519 | ||
3fbd517a BP |
1520 | #ifdef CONFIG_COMPAT |
1521 | static int compat_list_ports(struct datapath *dp, struct compat_odp_portvec __user *upv) | |
1522 | { | |
1523 | struct compat_odp_portvec pv; | |
1524 | int retval; | |
1525 | ||
1526 | if (copy_from_user(&pv, upv, sizeof pv)) | |
1527 | return -EFAULT; | |
1528 | ||
1529 | retval = do_list_ports(dp, compat_ptr(pv.ports), pv.n_ports); | |
1530 | if (retval < 0) | |
1531 | return retval; | |
1532 | ||
1533 | return put_user(retval, &upv->n_ports); | |
1534 | } | |
1535 | ||
3fbd517a BP |
1536 | static int compat_get_flow(struct odp_flow *flow, const struct compat_odp_flow __user *compat) |
1537 | { | |
1538 | compat_uptr_t actions; | |
1539 | ||
1540 | if (!access_ok(VERIFY_READ, compat, sizeof(struct compat_odp_flow)) || | |
1541 | __copy_from_user(&flow->stats, &compat->stats, sizeof(struct odp_flow_stats)) || | |
1542 | __copy_from_user(&flow->key, &compat->key, sizeof(struct odp_flow_key)) || | |
1543 | __get_user(actions, &compat->actions) || | |
cdee00fd | 1544 | __get_user(flow->actions_len, &compat->actions_len) || |
3fbd517a BP |
1545 | __get_user(flow->flags, &compat->flags)) |
1546 | return -EFAULT; | |
1547 | ||
1b29ebe5 | 1548 | flow->actions = (struct nlattr __force *)compat_ptr(actions); |
3fbd517a BP |
1549 | return 0; |
1550 | } | |
1551 | ||
1552 | static int compat_put_flow(struct datapath *dp, struct compat_odp_flow_put __user *ufp) | |
1553 | { | |
1554 | struct odp_flow_stats stats; | |
1555 | struct odp_flow_put fp; | |
1556 | int error; | |
1557 | ||
1558 | if (compat_get_flow(&fp.flow, &ufp->flow) || | |
1559 | get_user(fp.flags, &ufp->flags)) | |
1560 | return -EFAULT; | |
1561 | ||
1562 | error = do_put_flow(dp, &fp, &stats); | |
1563 | if (error) | |
1564 | return error; | |
1565 | ||
1566 | if (copy_to_user(&ufp->flow.stats, &stats, | |
1567 | sizeof(struct odp_flow_stats))) | |
1568 | return -EFAULT; | |
1569 | ||
1570 | return 0; | |
1571 | } | |
1572 | ||
d3c54451 JG |
1573 | static int compat_answer_query(struct datapath *dp, struct sw_flow *flow, |
1574 | u32 query_flags, | |
3fbd517a BP |
1575 | struct compat_odp_flow __user *ufp) |
1576 | { | |
1577 | compat_uptr_t actions; | |
1578 | ||
1579 | if (get_user(actions, &ufp->actions)) | |
1580 | return -EFAULT; | |
1581 | ||
d3c54451 | 1582 | return do_answer_query(dp, flow, query_flags, &ufp->stats, |
cdee00fd | 1583 | compat_ptr(actions), &ufp->actions_len); |
3fbd517a BP |
1584 | } |
1585 | ||
1586 | static int compat_del_flow(struct datapath *dp, struct compat_odp_flow __user *ufp) | |
1587 | { | |
1588 | struct sw_flow *flow; | |
1589 | struct odp_flow uf; | |
1590 | int error; | |
1591 | ||
1592 | if (compat_get_flow(&uf, ufp)) | |
1593 | return -EFAULT; | |
1594 | ||
1595 | flow = do_del_flow(dp, &uf.key); | |
1596 | if (IS_ERR(flow)) | |
1597 | return PTR_ERR(flow); | |
1598 | ||
d3c54451 | 1599 | error = compat_answer_query(dp, flow, 0, ufp); |
3fbd517a BP |
1600 | flow_deferred_free(flow); |
1601 | return error; | |
1602 | } | |
1603 | ||
1b29ebe5 JG |
1604 | static int compat_query_flows(struct datapath *dp, |
1605 | struct compat_odp_flow __user *flows, | |
1606 | u32 n_flows) | |
3fbd517a | 1607 | { |
9abaf6b3 | 1608 | struct tbl *table = get_table_protected(dp); |
3fbd517a BP |
1609 | u32 i; |
1610 | ||
1611 | for (i = 0; i < n_flows; i++) { | |
1612 | struct compat_odp_flow __user *ufp = &flows[i]; | |
1613 | struct odp_flow uf; | |
1614 | struct tbl_node *flow_node; | |
1615 | int error; | |
1616 | ||
1617 | if (compat_get_flow(&uf, ufp)) | |
1618 | return -EFAULT; | |
3fbd517a BP |
1619 | |
1620 | flow_node = tbl_lookup(table, &uf.key, flow_hash(&uf.key), flow_cmp); | |
1621 | if (!flow_node) | |
1622 | error = put_user(ENOENT, &ufp->stats.error); | |
1623 | else | |
d3c54451 JG |
1624 | error = compat_answer_query(dp, flow_cast(flow_node), |
1625 | uf.flags, ufp); | |
3fbd517a BP |
1626 | if (error) |
1627 | return -EFAULT; | |
1628 | } | |
1629 | return n_flows; | |
1630 | } | |
1631 | ||
1632 | struct compat_list_flows_cbdata { | |
d3c54451 | 1633 | struct datapath *dp; |
3fbd517a BP |
1634 | struct compat_odp_flow __user *uflows; |
1635 | u32 n_flows; | |
1636 | u32 listed_flows; | |
1637 | }; | |
1638 | ||
1639 | static int compat_list_flow(struct tbl_node *node, void *cbdata_) | |
1640 | { | |
1641 | struct sw_flow *flow = flow_cast(node); | |
1642 | struct compat_list_flows_cbdata *cbdata = cbdata_; | |
1643 | struct compat_odp_flow __user *ufp = &cbdata->uflows[cbdata->listed_flows++]; | |
1644 | int error; | |
1645 | ||
1646 | if (copy_to_user(&ufp->key, &flow->key, sizeof flow->key)) | |
1647 | return -EFAULT; | |
d3c54451 | 1648 | error = compat_answer_query(cbdata->dp, flow, 0, ufp); |
3fbd517a BP |
1649 | if (error) |
1650 | return error; | |
1651 | ||
1652 | if (cbdata->listed_flows >= cbdata->n_flows) | |
1653 | return cbdata->listed_flows; | |
1654 | return 0; | |
1655 | } | |
1656 | ||
1b29ebe5 JG |
1657 | static int compat_list_flows(struct datapath *dp, |
1658 | struct compat_odp_flow __user *flows, u32 n_flows) | |
3fbd517a BP |
1659 | { |
1660 | struct compat_list_flows_cbdata cbdata; | |
1661 | int error; | |
1662 | ||
1663 | if (!n_flows) | |
1664 | return 0; | |
1665 | ||
d3c54451 | 1666 | cbdata.dp = dp; |
3fbd517a BP |
1667 | cbdata.uflows = flows; |
1668 | cbdata.n_flows = n_flows; | |
1669 | cbdata.listed_flows = 0; | |
6bfafa55 | 1670 | |
9abaf6b3 | 1671 | error = tbl_foreach(get_table_protected(dp), compat_list_flow, &cbdata); |
3fbd517a BP |
1672 | return error ? error : cbdata.listed_flows; |
1673 | } | |
1674 | ||
1675 | static int compat_flowvec_ioctl(struct datapath *dp, unsigned long argp, | |
1676 | int (*function)(struct datapath *, | |
1b29ebe5 | 1677 | struct compat_odp_flow __user *, |
3fbd517a BP |
1678 | u32 n_flows)) |
1679 | { | |
1680 | struct compat_odp_flowvec __user *uflowvec; | |
1681 | struct compat_odp_flow __user *flows; | |
1682 | struct compat_odp_flowvec flowvec; | |
1683 | int retval; | |
1684 | ||
1685 | uflowvec = compat_ptr(argp); | |
1686 | if (!access_ok(VERIFY_WRITE, uflowvec, sizeof *uflowvec) || | |
1687 | copy_from_user(&flowvec, uflowvec, sizeof flowvec)) | |
1688 | return -EFAULT; | |
1689 | ||
1690 | if (flowvec.n_flows > INT_MAX / sizeof(struct compat_odp_flow)) | |
1691 | return -EINVAL; | |
1692 | ||
1693 | flows = compat_ptr(flowvec.flows); | |
1694 | if (!access_ok(VERIFY_WRITE, flows, | |
1695 | flowvec.n_flows * sizeof(struct compat_odp_flow))) | |
1696 | return -EFAULT; | |
1697 | ||
1698 | retval = function(dp, flows, flowvec.n_flows); | |
1699 | return (retval < 0 ? retval | |
1700 | : retval == flowvec.n_flows ? 0 | |
1701 | : put_user(retval, &uflowvec->n_flows)); | |
1702 | } | |
1703 | ||
1704 | static int compat_execute(struct datapath *dp, const struct compat_odp_execute __user *uexecute) | |
1705 | { | |
1706 | struct odp_execute execute; | |
1707 | compat_uptr_t actions; | |
1708 | compat_uptr_t data; | |
1709 | ||
1710 | if (!access_ok(VERIFY_READ, uexecute, sizeof(struct compat_odp_execute)) || | |
3fbd517a | 1711 | __get_user(actions, &uexecute->actions) || |
cdee00fd | 1712 | __get_user(execute.actions_len, &uexecute->actions_len) || |
3fbd517a BP |
1713 | __get_user(data, &uexecute->data) || |
1714 | __get_user(execute.length, &uexecute->length)) | |
1715 | return -EFAULT; | |
1716 | ||
1b29ebe5 JG |
1717 | execute.actions = (struct nlattr __force *)compat_ptr(actions); |
1718 | execute.data = (const void __force *)compat_ptr(data); | |
3fbd517a BP |
1719 | |
1720 | return do_execute(dp, &execute); | |
1721 | } | |
1722 | ||
1723 | static long openvswitch_compat_ioctl(struct file *f, unsigned int cmd, unsigned long argp) | |
1724 | { | |
1725 | int dp_idx = iminor(f->f_dentry->d_inode); | |
1726 | struct datapath *dp; | |
1727 | int err; | |
1728 | ||
1729 | switch (cmd) { | |
1730 | case ODP_DP_DESTROY: | |
1731 | case ODP_FLOW_FLUSH: | |
1732 | /* Ioctls that don't need any translation at all. */ | |
1733 | return openvswitch_ioctl(f, cmd, argp); | |
1734 | ||
1735 | case ODP_DP_CREATE: | |
c3827f61 BP |
1736 | case ODP_VPORT_ATTACH: |
1737 | case ODP_VPORT_DETACH: | |
1738 | case ODP_VPORT_MOD: | |
3fbd517a BP |
1739 | case ODP_VPORT_MTU_SET: |
1740 | case ODP_VPORT_MTU_GET: | |
1741 | case ODP_VPORT_ETHER_SET: | |
1742 | case ODP_VPORT_ETHER_GET: | |
780e6207 | 1743 | case ODP_VPORT_STATS_SET: |
3fbd517a BP |
1744 | case ODP_VPORT_STATS_GET: |
1745 | case ODP_DP_STATS: | |
1746 | case ODP_GET_DROP_FRAGS: | |
1747 | case ODP_SET_DROP_FRAGS: | |
1748 | case ODP_SET_LISTEN_MASK: | |
1749 | case ODP_GET_LISTEN_MASK: | |
1750 | case ODP_SET_SFLOW_PROBABILITY: | |
1751 | case ODP_GET_SFLOW_PROBABILITY: | |
c3827f61 | 1752 | case ODP_VPORT_QUERY: |
3fbd517a BP |
1753 | /* Ioctls that just need their pointer argument extended. */ |
1754 | return openvswitch_ioctl(f, cmd, (unsigned long)compat_ptr(argp)); | |
3fbd517a BP |
1755 | } |
1756 | ||
1757 | dp = get_dp_locked(dp_idx); | |
1758 | err = -ENODEV; | |
1759 | if (!dp) | |
1760 | goto exit; | |
1761 | ||
1762 | switch (cmd) { | |
c3827f61 | 1763 | case ODP_VPORT_LIST32: |
3fbd517a BP |
1764 | err = compat_list_ports(dp, compat_ptr(argp)); |
1765 | break; | |
1766 | ||
3fbd517a BP |
1767 | case ODP_FLOW_PUT32: |
1768 | err = compat_put_flow(dp, compat_ptr(argp)); | |
1769 | break; | |
1770 | ||
1771 | case ODP_FLOW_DEL32: | |
1772 | err = compat_del_flow(dp, compat_ptr(argp)); | |
1773 | break; | |
1774 | ||
1775 | case ODP_FLOW_GET32: | |
1776 | err = compat_flowvec_ioctl(dp, argp, compat_query_flows); | |
1777 | break; | |
1778 | ||
1779 | case ODP_FLOW_LIST32: | |
1780 | err = compat_flowvec_ioctl(dp, argp, compat_list_flows); | |
1781 | break; | |
1782 | ||
1783 | case ODP_EXECUTE32: | |
1784 | err = compat_execute(dp, compat_ptr(argp)); | |
1785 | break; | |
1786 | ||
1787 | default: | |
1788 | err = -ENOIOCTLCMD; | |
1789 | break; | |
1790 | } | |
1791 | mutex_unlock(&dp->mutex); | |
1792 | exit: | |
1793 | return err; | |
1794 | } | |
1795 | #endif | |
1796 | ||
9cc8b4e4 JG |
1797 | /* Unfortunately this function is not exported so this is a verbatim copy |
1798 | * from net/core/datagram.c in 2.6.30. */ | |
1799 | static int skb_copy_and_csum_datagram(const struct sk_buff *skb, int offset, | |
1800 | u8 __user *to, int len, | |
1801 | __wsum *csump) | |
1802 | { | |
1803 | int start = skb_headlen(skb); | |
1804 | int pos = 0; | |
1805 | int i, copy = start - offset; | |
1806 | ||
1807 | /* Copy header. */ | |
1808 | if (copy > 0) { | |
1809 | int err = 0; | |
1810 | if (copy > len) | |
1811 | copy = len; | |
1812 | *csump = csum_and_copy_to_user(skb->data + offset, to, copy, | |
1813 | *csump, &err); | |
1814 | if (err) | |
1815 | goto fault; | |
1816 | if ((len -= copy) == 0) | |
1817 | return 0; | |
1818 | offset += copy; | |
1819 | to += copy; | |
1820 | pos = copy; | |
1821 | } | |
1822 | ||
1823 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1824 | int end; | |
1825 | ||
1826 | WARN_ON(start > offset + len); | |
1827 | ||
1828 | end = start + skb_shinfo(skb)->frags[i].size; | |
1829 | if ((copy = end - offset) > 0) { | |
1830 | __wsum csum2; | |
1831 | int err = 0; | |
1832 | u8 *vaddr; | |
1833 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1834 | struct page *page = frag->page; | |
1835 | ||
1836 | if (copy > len) | |
1837 | copy = len; | |
1838 | vaddr = kmap(page); | |
1839 | csum2 = csum_and_copy_to_user(vaddr + | |
1840 | frag->page_offset + | |
1841 | offset - start, | |
1842 | to, copy, 0, &err); | |
1843 | kunmap(page); | |
1844 | if (err) | |
1845 | goto fault; | |
1846 | *csump = csum_block_add(*csump, csum2, pos); | |
1847 | if (!(len -= copy)) | |
1848 | return 0; | |
1849 | offset += copy; | |
1850 | to += copy; | |
1851 | pos += copy; | |
1852 | } | |
1853 | start = end; | |
1854 | } | |
1855 | ||
1856 | if (skb_shinfo(skb)->frag_list) { | |
1857 | struct sk_buff *list = skb_shinfo(skb)->frag_list; | |
1858 | ||
1859 | for (; list; list=list->next) { | |
1860 | int end; | |
1861 | ||
1862 | WARN_ON(start > offset + len); | |
1863 | ||
1864 | end = start + list->len; | |
1865 | if ((copy = end - offset) > 0) { | |
1866 | __wsum csum2 = 0; | |
1867 | if (copy > len) | |
1868 | copy = len; | |
1869 | if (skb_copy_and_csum_datagram(list, | |
1870 | offset - start, | |
1871 | to, copy, | |
1872 | &csum2)) | |
1873 | goto fault; | |
1874 | *csump = csum_block_add(*csump, csum2, pos); | |
1875 | if ((len -= copy) == 0) | |
1876 | return 0; | |
1877 | offset += copy; | |
1878 | to += copy; | |
1879 | pos += copy; | |
1880 | } | |
1881 | start = end; | |
1882 | } | |
1883 | } | |
1884 | if (!len) | |
1885 | return 0; | |
1886 | ||
1887 | fault: | |
1888 | return -EFAULT; | |
1889 | } | |
1890 | ||
33b38b63 JG |
1891 | static ssize_t openvswitch_read(struct file *f, char __user *buf, |
1892 | size_t nbytes, loff_t *ppos) | |
064af421 | 1893 | { |
7c40efc9 | 1894 | int listeners = get_listen_mask(f); |
064af421 | 1895 | int dp_idx = iminor(f->f_dentry->d_inode); |
e22d4953 | 1896 | struct datapath *dp = get_dp_locked(dp_idx); |
064af421 | 1897 | struct sk_buff *skb; |
9cc8b4e4 | 1898 | size_t copy_bytes, tot_copy_bytes; |
064af421 BP |
1899 | int retval; |
1900 | ||
1901 | if (!dp) | |
1902 | return -ENODEV; | |
1903 | ||
1904 | if (nbytes == 0 || !listeners) | |
1905 | return 0; | |
1906 | ||
1907 | for (;;) { | |
1908 | int i; | |
1909 | ||
1910 | for (i = 0; i < DP_N_QUEUES; i++) { | |
1911 | if (listeners & (1 << i)) { | |
1912 | skb = skb_dequeue(&dp->queues[i]); | |
1913 | if (skb) | |
1914 | goto success; | |
1915 | } | |
1916 | } | |
1917 | ||
1918 | if (f->f_flags & O_NONBLOCK) { | |
1919 | retval = -EAGAIN; | |
1920 | goto error; | |
1921 | } | |
1922 | ||
1923 | wait_event_interruptible(dp->waitqueue, | |
1924 | dp_has_packet_of_interest(dp, | |
1925 | listeners)); | |
1926 | ||
1927 | if (signal_pending(current)) { | |
1928 | retval = -ERESTARTSYS; | |
1929 | goto error; | |
1930 | } | |
1931 | } | |
1932 | success: | |
e22d4953 JG |
1933 | mutex_unlock(&dp->mutex); |
1934 | ||
9cc8b4e4 | 1935 | copy_bytes = tot_copy_bytes = min_t(size_t, skb->len, nbytes); |
d295e8e9 | 1936 | |
9cc8b4e4 JG |
1937 | retval = 0; |
1938 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
9fc10ed9 JG |
1939 | if (copy_bytes == skb->len) { |
1940 | __wsum csum = 0; | |
dd8d6b8c JG |
1941 | u16 csum_start, csum_offset; |
1942 | ||
1943 | get_skb_csum_pointers(skb, &csum_start, &csum_offset); | |
e0ce13c4 JG |
1944 | csum_start -= skb_headroom(skb); |
1945 | ||
f057cdda | 1946 | BUG_ON(csum_start >= skb_headlen(skb)); |
9cc8b4e4 JG |
1947 | retval = skb_copy_and_csum_datagram(skb, csum_start, buf + csum_start, |
1948 | copy_bytes - csum_start, &csum); | |
9cc8b4e4 JG |
1949 | if (!retval) { |
1950 | __sum16 __user *csump; | |
1951 | ||
1952 | copy_bytes = csum_start; | |
1953 | csump = (__sum16 __user *)(buf + csum_start + csum_offset); | |
f057cdda | 1954 | |
1b29ebe5 JG |
1955 | BUG_ON((char __user *)csump + sizeof(__sum16) > |
1956 | buf + nbytes); | |
9cc8b4e4 JG |
1957 | put_user(csum_fold(csum), csump); |
1958 | } | |
9fc10ed9 JG |
1959 | } else |
1960 | retval = skb_checksum_help(skb); | |
9cc8b4e4 JG |
1961 | } |
1962 | ||
1963 | if (!retval) { | |
1b29ebe5 | 1964 | struct iovec iov; |
9cc8b4e4 JG |
1965 | |
1966 | iov.iov_base = buf; | |
1967 | iov.iov_len = copy_bytes; | |
1968 | retval = skb_copy_datagram_iovec(skb, 0, &iov, iov.iov_len); | |
1969 | } | |
1970 | ||
064af421 | 1971 | if (!retval) |
9cc8b4e4 JG |
1972 | retval = tot_copy_bytes; |
1973 | ||
064af421 | 1974 | kfree_skb(skb); |
e22d4953 | 1975 | return retval; |
064af421 BP |
1976 | |
1977 | error: | |
e22d4953 | 1978 | mutex_unlock(&dp->mutex); |
064af421 BP |
1979 | return retval; |
1980 | } | |
1981 | ||
1982 | static unsigned int openvswitch_poll(struct file *file, poll_table *wait) | |
1983 | { | |
1984 | int dp_idx = iminor(file->f_dentry->d_inode); | |
e22d4953 | 1985 | struct datapath *dp = get_dp_locked(dp_idx); |
064af421 BP |
1986 | unsigned int mask; |
1987 | ||
1988 | if (dp) { | |
1989 | mask = 0; | |
1990 | poll_wait(file, &dp->waitqueue, wait); | |
7c40efc9 | 1991 | if (dp_has_packet_of_interest(dp, get_listen_mask(file))) |
064af421 | 1992 | mask |= POLLIN | POLLRDNORM; |
e22d4953 | 1993 | mutex_unlock(&dp->mutex); |
064af421 BP |
1994 | } else { |
1995 | mask = POLLIN | POLLRDNORM | POLLHUP; | |
1996 | } | |
1997 | return mask; | |
1998 | } | |
1999 | ||
33b38b63 | 2000 | static struct file_operations openvswitch_fops = { |
064af421 BP |
2001 | .read = openvswitch_read, |
2002 | .poll = openvswitch_poll, | |
2003 | .unlocked_ioctl = openvswitch_ioctl, | |
3fbd517a BP |
2004 | #ifdef CONFIG_COMPAT |
2005 | .compat_ioctl = openvswitch_compat_ioctl, | |
2006 | #endif | |
064af421 BP |
2007 | }; |
2008 | ||
2009 | static int major; | |
22d24ebf | 2010 | |
22d24ebf BP |
2011 | static int __init dp_init(void) |
2012 | { | |
f2459fe7 | 2013 | struct sk_buff *dummy_skb; |
22d24ebf BP |
2014 | int err; |
2015 | ||
f2459fe7 | 2016 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb)); |
22d24ebf | 2017 | |
f2459fe7 | 2018 | printk("Open vSwitch %s, built "__DATE__" "__TIME__"\n", VERSION BUILDNR); |
064af421 BP |
2019 | |
2020 | err = flow_init(); | |
2021 | if (err) | |
2022 | goto error; | |
2023 | ||
f2459fe7 | 2024 | err = vport_init(); |
064af421 BP |
2025 | if (err) |
2026 | goto error_flow_exit; | |
2027 | ||
f2459fe7 JG |
2028 | err = register_netdevice_notifier(&dp_device_notifier); |
2029 | if (err) | |
2030 | goto error_vport_exit; | |
2031 | ||
064af421 BP |
2032 | major = register_chrdev(0, "openvswitch", &openvswitch_fops); |
2033 | if (err < 0) | |
2034 | goto error_unreg_notifier; | |
2035 | ||
064af421 BP |
2036 | return 0; |
2037 | ||
2038 | error_unreg_notifier: | |
2039 | unregister_netdevice_notifier(&dp_device_notifier); | |
f2459fe7 JG |
2040 | error_vport_exit: |
2041 | vport_exit(); | |
064af421 BP |
2042 | error_flow_exit: |
2043 | flow_exit(); | |
2044 | error: | |
2045 | return err; | |
2046 | } | |
2047 | ||
2048 | static void dp_cleanup(void) | |
2049 | { | |
2050 | rcu_barrier(); | |
2051 | unregister_chrdev(major, "openvswitch"); | |
2052 | unregister_netdevice_notifier(&dp_device_notifier); | |
f2459fe7 | 2053 | vport_exit(); |
064af421 | 2054 | flow_exit(); |
064af421 BP |
2055 | } |
2056 | ||
2057 | module_init(dp_init); | |
2058 | module_exit(dp_cleanup); | |
2059 | ||
2060 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2061 | MODULE_LICENSE("GPL"); |