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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 | ||
027f9007 | 97 | static struct tbl *get_table_protected(struct datapath *dp) |
9abaf6b3 | 98 | { |
1452b28c JG |
99 | return rcu_dereference_protected(dp->table, |
100 | lockdep_is_held(&dp->mutex)); | |
101 | } | |
102 | ||
027f9007 | 103 | static struct vport *get_vport_protected(struct datapath *dp, u16 port_no) |
1452b28c JG |
104 | { |
105 | return rcu_dereference_protected(dp->ports[port_no], | |
106 | lockdep_is_held(&dp->mutex)); | |
9abaf6b3 JG |
107 | } |
108 | ||
f2459fe7 JG |
109 | /* Must be called with rcu_read_lock or RTNL lock. */ |
110 | const char *dp_name(const struct datapath *dp) | |
111 | { | |
ad919711 | 112 | return vport_get_name(rcu_dereference_rtnl(dp->ports[ODPP_LOCAL])); |
f2459fe7 JG |
113 | } |
114 | ||
064af421 BP |
115 | static inline size_t br_nlmsg_size(void) |
116 | { | |
117 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
118 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
119 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
120 | + nla_total_size(4) /* IFLA_MASTER */ | |
121 | + nla_total_size(4) /* IFLA_MTU */ | |
122 | + nla_total_size(4) /* IFLA_LINK */ | |
123 | + nla_total_size(1); /* IFLA_OPERSTATE */ | |
124 | } | |
125 | ||
126 | static int dp_fill_ifinfo(struct sk_buff *skb, | |
e779d8d9 | 127 | const struct vport *port, |
064af421 BP |
128 | int event, unsigned int flags) |
129 | { | |
027f9007 | 130 | struct datapath *dp = port->dp; |
e779d8d9 BP |
131 | int ifindex = vport_get_ifindex(port); |
132 | int iflink = vport_get_iflink(port); | |
064af421 BP |
133 | struct ifinfomsg *hdr; |
134 | struct nlmsghdr *nlh; | |
135 | ||
f2459fe7 JG |
136 | if (ifindex < 0) |
137 | return ifindex; | |
138 | ||
139 | if (iflink < 0) | |
140 | return iflink; | |
141 | ||
064af421 BP |
142 | nlh = nlmsg_put(skb, 0, 0, event, sizeof(*hdr), flags); |
143 | if (nlh == NULL) | |
144 | return -EMSGSIZE; | |
145 | ||
146 | hdr = nlmsg_data(nlh); | |
147 | hdr->ifi_family = AF_BRIDGE; | |
148 | hdr->__ifi_pad = 0; | |
f2459fe7 JG |
149 | hdr->ifi_type = ARPHRD_ETHER; |
150 | hdr->ifi_index = ifindex; | |
e779d8d9 | 151 | hdr->ifi_flags = vport_get_flags(port); |
064af421 BP |
152 | hdr->ifi_change = 0; |
153 | ||
e779d8d9 | 154 | NLA_PUT_STRING(skb, IFLA_IFNAME, vport_get_name(port)); |
ad919711 | 155 | NLA_PUT_U32(skb, IFLA_MASTER, |
1452b28c | 156 | vport_get_ifindex(get_vport_protected(dp, ODPP_LOCAL))); |
e779d8d9 | 157 | NLA_PUT_U32(skb, IFLA_MTU, vport_get_mtu(port)); |
064af421 BP |
158 | #ifdef IFLA_OPERSTATE |
159 | NLA_PUT_U8(skb, IFLA_OPERSTATE, | |
e779d8d9 BP |
160 | vport_is_running(port) |
161 | ? vport_get_operstate(port) | |
f2459fe7 | 162 | : IF_OPER_DOWN); |
064af421 BP |
163 | #endif |
164 | ||
e779d8d9 | 165 | NLA_PUT(skb, IFLA_ADDRESS, ETH_ALEN, vport_get_addr(port)); |
064af421 | 166 | |
f2459fe7 JG |
167 | if (ifindex != iflink) |
168 | NLA_PUT_U32(skb, IFLA_LINK,iflink); | |
064af421 BP |
169 | |
170 | return nlmsg_end(skb, nlh); | |
171 | ||
172 | nla_put_failure: | |
173 | nlmsg_cancel(skb, nlh); | |
174 | return -EMSGSIZE; | |
175 | } | |
176 | ||
e779d8d9 | 177 | static void dp_ifinfo_notify(int event, struct vport *port) |
064af421 | 178 | { |
064af421 BP |
179 | struct sk_buff *skb; |
180 | int err = -ENOBUFS; | |
181 | ||
182 | skb = nlmsg_new(br_nlmsg_size(), GFP_KERNEL); | |
183 | if (skb == NULL) | |
184 | goto errout; | |
185 | ||
186 | err = dp_fill_ifinfo(skb, port, event, 0); | |
187 | if (err < 0) { | |
188 | /* -EMSGSIZE implies BUG in br_nlmsg_size() */ | |
189 | WARN_ON(err == -EMSGSIZE); | |
190 | kfree_skb(skb); | |
191 | goto errout; | |
192 | } | |
f2459fe7 | 193 | rtnl_notify(skb, &init_net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); |
cfe7c1f5 | 194 | return; |
064af421 BP |
195 | errout: |
196 | if (err < 0) | |
f2459fe7 | 197 | rtnl_set_sk_err(&init_net, RTNLGRP_LINK, err); |
064af421 BP |
198 | } |
199 | ||
58c342f6 BP |
200 | static void release_dp(struct kobject *kobj) |
201 | { | |
202 | struct datapath *dp = container_of(kobj, struct datapath, ifobj); | |
203 | kfree(dp); | |
204 | } | |
205 | ||
35f7605b | 206 | static struct kobj_type dp_ktype = { |
58c342f6 BP |
207 | .release = release_dp |
208 | }; | |
209 | ||
064af421 BP |
210 | static int create_dp(int dp_idx, const char __user *devnamep) |
211 | { | |
f2459fe7 | 212 | struct odp_port internal_dev_port; |
064af421 BP |
213 | char devname[IFNAMSIZ]; |
214 | struct datapath *dp; | |
215 | int err; | |
216 | int i; | |
217 | ||
218 | if (devnamep) { | |
968f7c8d BP |
219 | int retval = strncpy_from_user(devname, devnamep, IFNAMSIZ); |
220 | if (retval < 0) { | |
221 | err = -EFAULT; | |
064af421 | 222 | goto err; |
968f7c8d BP |
223 | } else if (retval >= IFNAMSIZ) { |
224 | err = -ENAMETOOLONG; | |
225 | goto err; | |
226 | } | |
064af421 BP |
227 | } else { |
228 | snprintf(devname, sizeof devname, "of%d", dp_idx); | |
229 | } | |
230 | ||
231 | rtnl_lock(); | |
232 | mutex_lock(&dp_mutex); | |
233 | err = -ENODEV; | |
234 | if (!try_module_get(THIS_MODULE)) | |
235 | goto err_unlock; | |
236 | ||
237 | /* Exit early if a datapath with that number already exists. | |
238 | * (We don't use -EEXIST because that's ambiguous with 'devname' | |
239 | * conflicting with an existing network device name.) */ | |
240 | err = -EBUSY; | |
241 | if (get_dp(dp_idx)) | |
242 | goto err_put_module; | |
243 | ||
244 | err = -ENOMEM; | |
245 | dp = kzalloc(sizeof *dp, GFP_KERNEL); | |
246 | if (dp == NULL) | |
247 | goto err_put_module; | |
828bc1f0 | 248 | INIT_LIST_HEAD(&dp->port_list); |
064af421 | 249 | mutex_init(&dp->mutex); |
f072ebdd | 250 | mutex_lock(&dp->mutex); |
064af421 BP |
251 | dp->dp_idx = dp_idx; |
252 | for (i = 0; i < DP_N_QUEUES; i++) | |
253 | skb_queue_head_init(&dp->queues[i]); | |
254 | init_waitqueue_head(&dp->waitqueue); | |
255 | ||
58c342f6 | 256 | /* Initialize kobject for bridge. This will be added as |
b0c32774 | 257 | * /sys/class/net/<devname>/brif later, if sysfs is enabled. */ |
58c342f6 | 258 | dp->ifobj.kset = NULL; |
58c342f6 BP |
259 | kobject_init(&dp->ifobj, &dp_ktype); |
260 | ||
828bc1f0 BP |
261 | /* Allocate table. */ |
262 | err = -ENOMEM; | |
c6fadeb1 | 263 | rcu_assign_pointer(dp->table, tbl_create(TBL_MIN_BUCKETS)); |
828bc1f0 BP |
264 | if (!dp->table) |
265 | goto err_free_dp; | |
266 | ||
d6fbec6d | 267 | /* Set up our datapath device. */ |
092a872d BP |
268 | BUILD_BUG_ON(sizeof(internal_dev_port.devname) != sizeof(devname)); |
269 | strcpy(internal_dev_port.devname, devname); | |
c3827f61 | 270 | strcpy(internal_dev_port.type, "internal"); |
e779d8d9 | 271 | err = new_vport(dp, &internal_dev_port, ODPP_LOCAL); |
828bc1f0 | 272 | if (err) { |
f2459fe7 JG |
273 | if (err == -EBUSY) |
274 | err = -EEXIST; | |
275 | ||
064af421 | 276 | goto err_destroy_table; |
828bc1f0 | 277 | } |
064af421 BP |
278 | |
279 | dp->drop_frags = 0; | |
280 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); | |
94947cd8 JG |
281 | if (!dp->stats_percpu) { |
282 | err = -ENOMEM; | |
064af421 | 283 | goto err_destroy_local_port; |
94947cd8 | 284 | } |
064af421 BP |
285 | |
286 | rcu_assign_pointer(dps[dp_idx], dp); | |
dad80ec3 JG |
287 | dp_sysfs_add_dp(dp); |
288 | ||
f072ebdd | 289 | mutex_unlock(&dp->mutex); |
064af421 BP |
290 | mutex_unlock(&dp_mutex); |
291 | rtnl_unlock(); | |
292 | ||
064af421 BP |
293 | return 0; |
294 | ||
295 | err_destroy_local_port: | |
1452b28c | 296 | dp_detach_port(get_vport_protected(dp, ODPP_LOCAL)); |
064af421 | 297 | err_destroy_table: |
6f20002c | 298 | tbl_destroy(get_table_protected(dp), NULL); |
064af421 | 299 | err_free_dp: |
f072ebdd | 300 | mutex_unlock(&dp->mutex); |
064af421 BP |
301 | kfree(dp); |
302 | err_put_module: | |
303 | module_put(THIS_MODULE); | |
304 | err_unlock: | |
305 | mutex_unlock(&dp_mutex); | |
306 | rtnl_unlock(); | |
307 | err: | |
308 | return err; | |
309 | } | |
310 | ||
8f843b6f | 311 | static int destroy_dp(int dp_idx) |
064af421 | 312 | { |
8f843b6f JG |
313 | struct datapath *dp; |
314 | int err = 0; | |
e779d8d9 | 315 | struct vport *p, *n; |
064af421 BP |
316 | int i; |
317 | ||
8f843b6f JG |
318 | rtnl_lock(); |
319 | mutex_lock(&dp_mutex); | |
320 | dp = get_dp(dp_idx); | |
321 | if (!dp) { | |
322 | err = -ENODEV; | |
b0fb95ac | 323 | goto out; |
8f843b6f JG |
324 | } |
325 | ||
b0fb95ac JG |
326 | mutex_lock(&dp->mutex); |
327 | ||
6fba0d0b BP |
328 | list_for_each_entry_safe (p, n, &dp->port_list, node) |
329 | if (p->port_no != ODPP_LOCAL) | |
c3827f61 | 330 | dp_detach_port(p); |
6fba0d0b | 331 | |
2ba9026e | 332 | dp_sysfs_del_dp(dp); |
064af421 | 333 | |
064af421 | 334 | rcu_assign_pointer(dps[dp->dp_idx], NULL); |
064af421 | 335 | |
1452b28c | 336 | dp_detach_port(get_vport_protected(dp, ODPP_LOCAL)); |
6f20002c | 337 | tbl_destroy(get_table_protected(dp), flow_free_tbl); |
6fba0d0b | 338 | |
064af421 BP |
339 | for (i = 0; i < DP_N_QUEUES; i++) |
340 | skb_queue_purge(&dp->queues[i]); | |
064af421 | 341 | free_percpu(dp->stats_percpu); |
8f843b6f | 342 | |
b0fb95ac | 343 | mutex_unlock(&dp->mutex); |
58c342f6 | 344 | kobject_put(&dp->ifobj); |
064af421 | 345 | module_put(THIS_MODULE); |
064af421 | 346 | |
b0fb95ac | 347 | out: |
064af421 BP |
348 | mutex_unlock(&dp_mutex); |
349 | rtnl_unlock(); | |
064af421 BP |
350 | return err; |
351 | } | |
352 | ||
f072ebdd | 353 | /* Called with RTNL lock and dp->mutex. */ |
e779d8d9 | 354 | static int new_vport(struct datapath *dp, struct odp_port *odp_port, int port_no) |
064af421 | 355 | { |
c3827f61 | 356 | struct vport_parms parms; |
f2459fe7 | 357 | struct vport *vport; |
f2459fe7 | 358 | |
c3827f61 BP |
359 | parms.name = odp_port->devname; |
360 | parms.type = odp_port->type; | |
361 | parms.config = odp_port->config; | |
e779d8d9 BP |
362 | parms.dp = dp; |
363 | parms.port_no = port_no; | |
f2459fe7 | 364 | |
c3827f61 BP |
365 | vport_lock(); |
366 | vport = vport_add(&parms); | |
367 | vport_unlock(); | |
064af421 | 368 | |
c3827f61 BP |
369 | if (IS_ERR(vport)) |
370 | return PTR_ERR(vport); | |
064af421 | 371 | |
e779d8d9 BP |
372 | rcu_assign_pointer(dp->ports[port_no], vport); |
373 | list_add_rcu(&vport->node, &dp->port_list); | |
064af421 BP |
374 | dp->n_ports++; |
375 | ||
e779d8d9 | 376 | dp_ifinfo_notify(RTM_NEWLINK, vport); |
064af421 BP |
377 | |
378 | return 0; | |
379 | } | |
380 | ||
f2459fe7 | 381 | static int attach_port(int dp_idx, struct odp_port __user *portp) |
064af421 | 382 | { |
064af421 BP |
383 | struct datapath *dp; |
384 | struct odp_port port; | |
385 | int port_no; | |
386 | int err; | |
387 | ||
388 | err = -EFAULT; | |
389 | if (copy_from_user(&port, portp, sizeof port)) | |
390 | goto out; | |
391 | port.devname[IFNAMSIZ - 1] = '\0'; | |
c3827f61 | 392 | port.type[VPORT_TYPE_SIZE - 1] = '\0'; |
064af421 BP |
393 | |
394 | rtnl_lock(); | |
395 | dp = get_dp_locked(dp_idx); | |
396 | err = -ENODEV; | |
397 | if (!dp) | |
398 | goto out_unlock_rtnl; | |
399 | ||
9ee3ae3e BP |
400 | for (port_no = 1; port_no < DP_MAX_PORTS; port_no++) |
401 | if (!dp->ports[port_no]) | |
402 | goto got_port_no; | |
3c71830a | 403 | err = -EFBIG; |
9ee3ae3e | 404 | goto out_unlock_dp; |
064af421 | 405 | |
9ee3ae3e | 406 | got_port_no: |
e779d8d9 | 407 | err = new_vport(dp, &port, port_no); |
064af421 | 408 | if (err) |
f2459fe7 | 409 | goto out_unlock_dp; |
064af421 | 410 | |
d8b5d43a | 411 | set_internal_devs_mtu(dp); |
1452b28c | 412 | dp_sysfs_add_if(get_vport_protected(dp, port_no)); |
064af421 | 413 | |
776f10ce | 414 | err = put_user(port_no, &portp->port); |
064af421 | 415 | |
064af421 BP |
416 | out_unlock_dp: |
417 | mutex_unlock(&dp->mutex); | |
418 | out_unlock_rtnl: | |
419 | rtnl_unlock(); | |
420 | out: | |
421 | return err; | |
422 | } | |
423 | ||
e779d8d9 | 424 | int dp_detach_port(struct vport *p) |
064af421 | 425 | { |
f2459fe7 JG |
426 | int err; |
427 | ||
064af421 BP |
428 | ASSERT_RTNL(); |
429 | ||
2e7dd8ec | 430 | if (p->port_no != ODPP_LOCAL) |
0515ceb3 | 431 | dp_sysfs_del_if(p); |
064af421 BP |
432 | dp_ifinfo_notify(RTM_DELLINK, p); |
433 | ||
064af421 | 434 | /* First drop references to device. */ |
f2459fe7 | 435 | p->dp->n_ports--; |
064af421 BP |
436 | list_del_rcu(&p->node); |
437 | rcu_assign_pointer(p->dp->ports[p->port_no], NULL); | |
f2459fe7 | 438 | |
7237e4f4 | 439 | /* Then destroy it. */ |
c3827f61 | 440 | vport_lock(); |
7237e4f4 | 441 | err = vport_del(p); |
c3827f61 | 442 | vport_unlock(); |
f2459fe7 | 443 | |
7237e4f4 | 444 | return err; |
064af421 BP |
445 | } |
446 | ||
f2459fe7 | 447 | static int detach_port(int dp_idx, int port_no) |
064af421 | 448 | { |
e779d8d9 | 449 | struct vport *p; |
064af421 | 450 | struct datapath *dp; |
064af421 BP |
451 | int err; |
452 | ||
453 | err = -EINVAL; | |
454 | if (port_no < 0 || port_no >= DP_MAX_PORTS || port_no == ODPP_LOCAL) | |
455 | goto out; | |
456 | ||
457 | rtnl_lock(); | |
458 | dp = get_dp_locked(dp_idx); | |
459 | err = -ENODEV; | |
460 | if (!dp) | |
461 | goto out_unlock_rtnl; | |
462 | ||
1452b28c | 463 | p = get_vport_protected(dp, port_no); |
064af421 BP |
464 | err = -ENOENT; |
465 | if (!p) | |
466 | goto out_unlock_dp; | |
467 | ||
c3827f61 | 468 | err = dp_detach_port(p); |
064af421 BP |
469 | |
470 | out_unlock_dp: | |
471 | mutex_unlock(&dp->mutex); | |
472 | out_unlock_rtnl: | |
473 | rtnl_unlock(); | |
474 | out: | |
064af421 BP |
475 | return err; |
476 | } | |
477 | ||
8819fac7 | 478 | /* Must be called with rcu_read_lock. */ |
e779d8d9 | 479 | void dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
480 | { |
481 | struct datapath *dp = p->dp; | |
482 | struct dp_stats_percpu *stats; | |
8819fac7 | 483 | int stats_counter_off; |
55574bb0 BP |
484 | struct sw_flow_actions *acts; |
485 | struct loop_counter *loop; | |
4c1ad233 | 486 | int error; |
064af421 | 487 | |
e779d8d9 | 488 | OVS_CB(skb)->vport = p; |
a063b0df | 489 | |
3976f6d5 JG |
490 | if (!OVS_CB(skb)->flow) { |
491 | struct odp_flow_key key; | |
492 | struct tbl_node *flow_node; | |
b7a31ec1 | 493 | bool is_frag; |
4c1ad233 | 494 | |
3976f6d5 | 495 | /* Extract flow from 'skb' into 'key'. */ |
b7a31ec1 | 496 | error = flow_extract(skb, p ? p->port_no : ODPP_NONE, &key, &is_frag); |
3976f6d5 JG |
497 | if (unlikely(error)) { |
498 | kfree_skb(skb); | |
499 | return; | |
500 | } | |
064af421 | 501 | |
b7a31ec1 | 502 | if (is_frag && dp->drop_frags) { |
3976f6d5 JG |
503 | kfree_skb(skb); |
504 | stats_counter_off = offsetof(struct dp_stats_percpu, n_frags); | |
505 | goto out; | |
506 | } | |
507 | ||
508 | /* Look up flow. */ | |
509 | flow_node = tbl_lookup(rcu_dereference(dp->table), &key, | |
510 | flow_hash(&key), flow_cmp); | |
511 | if (unlikely(!flow_node)) { | |
8dda8c9b JG |
512 | dp_output_control(dp, skb, _ODPL_MISS_NR, |
513 | (__force u64)OVS_CB(skb)->tun_id); | |
3976f6d5 JG |
514 | stats_counter_off = offsetof(struct dp_stats_percpu, n_missed); |
515 | goto out; | |
516 | } | |
517 | ||
518 | OVS_CB(skb)->flow = flow_cast(flow_node); | |
55574bb0 BP |
519 | } |
520 | ||
f267de8a | 521 | stats_counter_off = offsetof(struct dp_stats_percpu, n_hit); |
3976f6d5 | 522 | flow_used(OVS_CB(skb)->flow, skb); |
55574bb0 | 523 | |
3976f6d5 | 524 | acts = rcu_dereference(OVS_CB(skb)->flow->sf_acts); |
55574bb0 BP |
525 | |
526 | /* Check whether we've looped too much. */ | |
7eaa9830 JG |
527 | loop = loop_get_counter(); |
528 | if (unlikely(++loop->count > MAX_LOOPS)) | |
55574bb0 BP |
529 | loop->looping = true; |
530 | if (unlikely(loop->looping)) { | |
7eaa9830 | 531 | loop_suppress(dp, acts); |
f267de8a | 532 | kfree_skb(skb); |
55574bb0 | 533 | goto out_loop; |
064af421 | 534 | } |
8819fac7 | 535 | |
55574bb0 | 536 | /* Execute actions. */ |
3976f6d5 | 537 | execute_actions(dp, skb, &OVS_CB(skb)->flow->key, acts->actions, |
cdee00fd | 538 | acts->actions_len); |
55574bb0 BP |
539 | |
540 | /* Check whether sub-actions looped too much. */ | |
541 | if (unlikely(loop->looping)) | |
7eaa9830 | 542 | loop_suppress(dp, acts); |
55574bb0 BP |
543 | |
544 | out_loop: | |
545 | /* Decrement loop counter. */ | |
546 | if (!--loop->count) | |
547 | loop->looping = false; | |
7eaa9830 | 548 | loop_put_counter(); |
55574bb0 | 549 | |
8819fac7 | 550 | out: |
55574bb0 | 551 | /* Update datapath statistics. */ |
8819fac7 JG |
552 | local_bh_disable(); |
553 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); | |
38c6ecbc JG |
554 | |
555 | write_seqcount_begin(&stats->seqlock); | |
8819fac7 | 556 | (*(u64 *)((u8 *)stats + stats_counter_off))++; |
38c6ecbc JG |
557 | write_seqcount_end(&stats->seqlock); |
558 | ||
8819fac7 | 559 | local_bh_enable(); |
064af421 BP |
560 | } |
561 | ||
cb5087ca BP |
562 | /* Append each packet in 'skb' list to 'queue'. There will be only one packet |
563 | * unless we broke up a GSO packet. */ | |
fceb2a5b | 564 | static int queue_control_packets(struct sk_buff *skb, struct sk_buff_head *queue, |
b9298d3f | 565 | int queue_no, u64 arg) |
cb5087ca BP |
566 | { |
567 | struct sk_buff *nskb; | |
568 | int port_no; | |
569 | int err; | |
570 | ||
e779d8d9 BP |
571 | if (OVS_CB(skb)->vport) |
572 | port_no = OVS_CB(skb)->vport->port_no; | |
f2459fe7 JG |
573 | else |
574 | port_no = ODPP_LOCAL; | |
cb5087ca BP |
575 | |
576 | do { | |
577 | struct odp_msg *header; | |
578 | ||
579 | nskb = skb->next; | |
580 | skb->next = NULL; | |
581 | ||
cb5087ca BP |
582 | err = skb_cow(skb, sizeof *header); |
583 | if (err) | |
584 | goto err_kfree_skbs; | |
585 | ||
586 | header = (struct odp_msg*)__skb_push(skb, sizeof *header); | |
587 | header->type = queue_no; | |
588 | header->length = skb->len; | |
589 | header->port = port_no; | |
cb5087ca BP |
590 | header->arg = arg; |
591 | skb_queue_tail(queue, skb); | |
592 | ||
593 | skb = nskb; | |
594 | } while (skb); | |
595 | return 0; | |
596 | ||
597 | err_kfree_skbs: | |
598 | kfree_skb(skb); | |
599 | while ((skb = nskb) != NULL) { | |
600 | nskb = skb->next; | |
601 | kfree_skb(skb); | |
602 | } | |
603 | return err; | |
604 | } | |
605 | ||
fceb2a5b | 606 | int dp_output_control(struct datapath *dp, struct sk_buff *skb, int queue_no, |
b9298d3f | 607 | u64 arg) |
064af421 BP |
608 | { |
609 | struct dp_stats_percpu *stats; | |
610 | struct sk_buff_head *queue; | |
064af421 BP |
611 | int err; |
612 | ||
613 | WARN_ON_ONCE(skb_shared(skb)); | |
72b06300 | 614 | BUG_ON(queue_no != _ODPL_MISS_NR && queue_no != _ODPL_ACTION_NR && queue_no != _ODPL_SFLOW_NR); |
064af421 BP |
615 | queue = &dp->queues[queue_no]; |
616 | err = -ENOBUFS; | |
617 | if (skb_queue_len(queue) >= DP_MAX_QUEUE_LEN) | |
618 | goto err_kfree_skb; | |
619 | ||
a6057323 JG |
620 | forward_ip_summed(skb); |
621 | ||
a2377e44 JG |
622 | err = vswitch_skb_checksum_setup(skb); |
623 | if (err) | |
624 | goto err_kfree_skb; | |
625 | ||
064af421 BP |
626 | /* Break apart GSO packets into their component pieces. Otherwise |
627 | * userspace may try to stuff a 64kB packet into a 1500-byte MTU. */ | |
628 | if (skb_is_gso(skb)) { | |
9cc8b4e4 | 629 | struct sk_buff *nskb = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM); |
2d7ce2ee JG |
630 | |
631 | kfree_skb(skb); | |
632 | skb = nskb; | |
40796b34 | 633 | if (IS_ERR(skb)) { |
2d7ce2ee JG |
634 | err = PTR_ERR(skb); |
635 | goto err; | |
064af421 BP |
636 | } |
637 | } | |
638 | ||
cb5087ca | 639 | err = queue_control_packets(skb, queue, queue_no, arg); |
064af421 | 640 | wake_up_interruptible(&dp->waitqueue); |
cb5087ca | 641 | return err; |
064af421 BP |
642 | |
643 | err_kfree_skb: | |
644 | kfree_skb(skb); | |
645 | err: | |
1c075d0a JG |
646 | local_bh_disable(); |
647 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); | |
38c6ecbc JG |
648 | |
649 | write_seqcount_begin(&stats->seqlock); | |
064af421 | 650 | stats->n_lost++; |
38c6ecbc JG |
651 | write_seqcount_end(&stats->seqlock); |
652 | ||
1c075d0a | 653 | local_bh_enable(); |
064af421 BP |
654 | |
655 | return err; | |
656 | } | |
657 | ||
658 | static int flush_flows(struct datapath *dp) | |
659 | { | |
9abaf6b3 | 660 | struct tbl *old_table = get_table_protected(dp); |
8d5ebd83 JG |
661 | struct tbl *new_table; |
662 | ||
c6fadeb1 | 663 | new_table = tbl_create(TBL_MIN_BUCKETS); |
8d5ebd83 JG |
664 | if (!new_table) |
665 | return -ENOMEM; | |
666 | ||
667 | rcu_assign_pointer(dp->table, new_table); | |
668 | ||
669 | tbl_deferred_destroy(old_table, flow_free_tbl); | |
670 | ||
671 | return 0; | |
064af421 BP |
672 | } |
673 | ||
cdee00fd | 674 | static int validate_actions(const struct nlattr *actions, u32 actions_len) |
064af421 | 675 | { |
cdee00fd BP |
676 | const struct nlattr *a; |
677 | int rem; | |
678 | ||
679 | nla_for_each_attr(a, actions, actions_len, rem) { | |
680 | static const u32 action_lens[ODPAT_MAX + 1] = { | |
681 | [ODPAT_OUTPUT] = 4, | |
b9298d3f | 682 | [ODPAT_CONTROLLER] = 8, |
cdee00fd BP |
683 | [ODPAT_SET_DL_TCI] = 2, |
684 | [ODPAT_STRIP_VLAN] = 0, | |
685 | [ODPAT_SET_DL_SRC] = ETH_ALEN, | |
686 | [ODPAT_SET_DL_DST] = ETH_ALEN, | |
687 | [ODPAT_SET_NW_SRC] = 4, | |
688 | [ODPAT_SET_NW_DST] = 4, | |
689 | [ODPAT_SET_NW_TOS] = 1, | |
690 | [ODPAT_SET_TP_SRC] = 2, | |
691 | [ODPAT_SET_TP_DST] = 2, | |
b9298d3f | 692 | [ODPAT_SET_TUNNEL] = 8, |
cdee00fd BP |
693 | [ODPAT_SET_PRIORITY] = 4, |
694 | [ODPAT_POP_PRIORITY] = 0, | |
695 | [ODPAT_DROP_SPOOFED_ARP] = 0, | |
696 | }; | |
697 | int type = nla_type(a); | |
698 | ||
699 | if (type > ODPAT_MAX || nla_len(a) != action_lens[type]) | |
700 | return -EINVAL; | |
701 | ||
702 | switch (type) { | |
703 | case ODPAT_UNSPEC: | |
704 | return -EINVAL; | |
064af421 | 705 | |
cdee00fd BP |
706 | case ODPAT_CONTROLLER: |
707 | case ODPAT_STRIP_VLAN: | |
708 | case ODPAT_SET_DL_SRC: | |
709 | case ODPAT_SET_DL_DST: | |
710 | case ODPAT_SET_NW_SRC: | |
711 | case ODPAT_SET_NW_DST: | |
712 | case ODPAT_SET_TP_SRC: | |
713 | case ODPAT_SET_TP_DST: | |
714 | case ODPAT_SET_TUNNEL: | |
715 | case ODPAT_SET_PRIORITY: | |
716 | case ODPAT_POP_PRIORITY: | |
717 | case ODPAT_DROP_SPOOFED_ARP: | |
718 | /* No validation needed. */ | |
719 | break; | |
720 | ||
721 | case ODPAT_OUTPUT: | |
722 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
723 | return -EINVAL; | |
724 | ||
725 | case ODPAT_SET_DL_TCI: | |
726 | if (nla_get_be16(a) & htons(VLAN_CFI_MASK)) | |
064af421 | 727 | return -EINVAL; |
cdee00fd | 728 | break; |
064af421 | 729 | |
cdee00fd BP |
730 | case ODPAT_SET_NW_TOS: |
731 | if (nla_get_u8(a) & INET_ECN_MASK) | |
732 | return -EINVAL; | |
733 | break; | |
064af421 | 734 | |
cdee00fd BP |
735 | default: |
736 | return -EOPNOTSUPP; | |
737 | } | |
738 | } | |
3c5f6de3 | 739 | |
cdee00fd BP |
740 | if (rem > 0) |
741 | return -EINVAL; | |
064af421 | 742 | |
cdee00fd | 743 | return 0; |
064af421 BP |
744 | } |
745 | ||
746 | static struct sw_flow_actions *get_actions(const struct odp_flow *flow) | |
747 | { | |
748 | struct sw_flow_actions *actions; | |
749 | int error; | |
750 | ||
cdee00fd | 751 | actions = flow_actions_alloc(flow->actions_len); |
064af421 BP |
752 | error = PTR_ERR(actions); |
753 | if (IS_ERR(actions)) | |
754 | goto error; | |
755 | ||
756 | error = -EFAULT; | |
1b29ebe5 | 757 | if (copy_from_user(actions->actions, |
6c229737 | 758 | (struct nlattr __user __force *)flow->actions, |
1b29ebe5 | 759 | flow->actions_len)) |
064af421 | 760 | goto error_free_actions; |
cdee00fd | 761 | error = validate_actions(actions->actions, actions->actions_len); |
064af421 BP |
762 | if (error) |
763 | goto error_free_actions; | |
764 | ||
765 | return actions; | |
766 | ||
767 | error_free_actions: | |
768 | kfree(actions); | |
769 | error: | |
770 | return ERR_PTR(error); | |
771 | } | |
772 | ||
65d042a1 | 773 | static void get_stats(struct sw_flow *flow, struct odp_flow_stats *stats) |
6bfafa55 JG |
774 | { |
775 | if (flow->used) { | |
65d042a1 | 776 | struct timespec offset_ts, used, now_mono; |
6bfafa55 | 777 | |
65d042a1 HZ |
778 | ktime_get_ts(&now_mono); |
779 | jiffies_to_timespec(jiffies - flow->used, &offset_ts); | |
780 | set_normalized_timespec(&used, now_mono.tv_sec - offset_ts.tv_sec, | |
781 | now_mono.tv_nsec - offset_ts.tv_nsec); | |
6bfafa55 JG |
782 | |
783 | stats->used_sec = used.tv_sec; | |
784 | stats->used_nsec = used.tv_nsec; | |
064af421 BP |
785 | } else { |
786 | stats->used_sec = 0; | |
787 | stats->used_nsec = 0; | |
788 | } | |
6bfafa55 | 789 | |
064af421 BP |
790 | stats->n_packets = flow->packet_count; |
791 | stats->n_bytes = flow->byte_count; | |
abfec865 | 792 | stats->reserved = 0; |
064af421 | 793 | stats->tcp_flags = flow->tcp_flags; |
f1aa2072 | 794 | stats->error = 0; |
064af421 BP |
795 | } |
796 | ||
797 | static void clear_stats(struct sw_flow *flow) | |
798 | { | |
6bfafa55 | 799 | flow->used = 0; |
064af421 | 800 | flow->tcp_flags = 0; |
064af421 BP |
801 | flow->packet_count = 0; |
802 | flow->byte_count = 0; | |
803 | } | |
804 | ||
8d5ebd83 JG |
805 | static int expand_table(struct datapath *dp) |
806 | { | |
9abaf6b3 | 807 | struct tbl *old_table = get_table_protected(dp); |
8d5ebd83 JG |
808 | struct tbl *new_table; |
809 | ||
810 | new_table = tbl_expand(old_table); | |
811 | if (IS_ERR(new_table)) | |
812 | return PTR_ERR(new_table); | |
813 | ||
814 | rcu_assign_pointer(dp->table, new_table); | |
815 | tbl_deferred_destroy(old_table, NULL); | |
816 | ||
817 | return 0; | |
818 | } | |
819 | ||
44e05eca BP |
820 | static int do_put_flow(struct datapath *dp, struct odp_flow_put *uf, |
821 | struct odp_flow_stats *stats) | |
064af421 | 822 | { |
8d5ebd83 | 823 | struct tbl_node *flow_node; |
6fa58f7a | 824 | struct sw_flow *flow; |
8d5ebd83 | 825 | struct tbl *table; |
3d82583c | 826 | struct sw_flow_actions *acts = NULL; |
064af421 | 827 | int error; |
58f8f0e7 | 828 | u32 hash; |
064af421 | 829 | |
58f8f0e7 | 830 | hash = flow_hash(&uf->flow.key); |
9abaf6b3 | 831 | table = get_table_protected(dp); |
58f8f0e7 | 832 | flow_node = tbl_lookup(table, &uf->flow.key, hash, flow_cmp); |
8d5ebd83 | 833 | if (!flow_node) { |
6fa58f7a | 834 | /* No such flow. */ |
064af421 | 835 | error = -ENOENT; |
44e05eca | 836 | if (!(uf->flags & ODPPF_CREATE)) |
064af421 BP |
837 | goto error; |
838 | ||
839 | /* Expand table, if necessary, to make room. */ | |
8d5ebd83 JG |
840 | if (tbl_count(table) >= tbl_n_buckets(table)) { |
841 | error = expand_table(dp); | |
064af421 BP |
842 | if (error) |
843 | goto error; | |
9abaf6b3 | 844 | table = get_table_protected(dp); |
064af421 BP |
845 | } |
846 | ||
847 | /* Allocate flow. */ | |
560e8022 JG |
848 | flow = flow_alloc(); |
849 | if (IS_ERR(flow)) { | |
850 | error = PTR_ERR(flow); | |
064af421 | 851 | goto error; |
560e8022 | 852 | } |
44e05eca | 853 | flow->key = uf->flow.key; |
064af421 BP |
854 | clear_stats(flow); |
855 | ||
856 | /* Obtain actions. */ | |
44e05eca | 857 | acts = get_actions(&uf->flow); |
064af421 BP |
858 | error = PTR_ERR(acts); |
859 | if (IS_ERR(acts)) | |
860 | goto error_free_flow; | |
861 | rcu_assign_pointer(flow->sf_acts, acts); | |
862 | ||
863 | /* Put flow in bucket. */ | |
58f8f0e7 | 864 | error = tbl_insert(table, &flow->tbl_node, hash); |
6fa58f7a BP |
865 | if (error) |
866 | goto error_free_flow_acts; | |
8d5ebd83 | 867 | |
44e05eca | 868 | memset(stats, 0, sizeof(struct odp_flow_stats)); |
064af421 BP |
869 | } else { |
870 | /* We found a matching flow. */ | |
064af421 | 871 | struct sw_flow_actions *old_acts, *new_acts; |
064af421 | 872 | |
8d5ebd83 JG |
873 | flow = flow_cast(flow_node); |
874 | ||
064af421 BP |
875 | /* Bail out if we're not allowed to modify an existing flow. */ |
876 | error = -EEXIST; | |
44e05eca | 877 | if (!(uf->flags & ODPPF_MODIFY)) |
064af421 BP |
878 | goto error; |
879 | ||
880 | /* Swap actions. */ | |
44e05eca | 881 | new_acts = get_actions(&uf->flow); |
064af421 BP |
882 | error = PTR_ERR(new_acts); |
883 | if (IS_ERR(new_acts)) | |
884 | goto error; | |
d3c54451 JG |
885 | |
886 | old_acts = rcu_dereference_protected(flow->sf_acts, | |
887 | lockdep_is_held(&dp->mutex)); | |
cdee00fd | 888 | if (old_acts->actions_len != new_acts->actions_len || |
064af421 | 889 | memcmp(old_acts->actions, new_acts->actions, |
cdee00fd | 890 | old_acts->actions_len)) { |
064af421 BP |
891 | rcu_assign_pointer(flow->sf_acts, new_acts); |
892 | flow_deferred_free_acts(old_acts); | |
893 | } else { | |
894 | kfree(new_acts); | |
895 | } | |
896 | ||
897 | /* Fetch stats, then clear them if necessary. */ | |
1d7241c7 | 898 | spin_lock_bh(&flow->lock); |
65d042a1 | 899 | get_stats(flow, stats); |
44e05eca | 900 | if (uf->flags & ODPPF_ZERO_STATS) |
064af421 | 901 | clear_stats(flow); |
1d7241c7 | 902 | spin_unlock_bh(&flow->lock); |
064af421 BP |
903 | } |
904 | ||
064af421 BP |
905 | return 0; |
906 | ||
6fa58f7a | 907 | error_free_flow_acts: |
3d82583c | 908 | kfree(acts); |
064af421 | 909 | error_free_flow: |
fb8c9347 JG |
910 | flow->sf_acts = NULL; |
911 | flow_put(flow); | |
064af421 BP |
912 | error: |
913 | return error; | |
914 | } | |
915 | ||
44e05eca BP |
916 | static int put_flow(struct datapath *dp, struct odp_flow_put __user *ufp) |
917 | { | |
918 | struct odp_flow_stats stats; | |
919 | struct odp_flow_put uf; | |
920 | int error; | |
921 | ||
922 | if (copy_from_user(&uf, ufp, sizeof(struct odp_flow_put))) | |
923 | return -EFAULT; | |
924 | ||
925 | error = do_put_flow(dp, &uf, &stats); | |
926 | if (error) | |
927 | return error; | |
928 | ||
776f10ce BP |
929 | if (copy_to_user(&ufp->flow.stats, &stats, |
930 | sizeof(struct odp_flow_stats))) | |
44e05eca BP |
931 | return -EFAULT; |
932 | ||
933 | return 0; | |
934 | } | |
935 | ||
d3c54451 JG |
936 | static int do_answer_query(struct datapath *dp, struct sw_flow *flow, |
937 | u32 query_flags, | |
44e05eca | 938 | struct odp_flow_stats __user *ustats, |
cdee00fd BP |
939 | struct nlattr __user *actions, |
940 | u32 __user *actions_lenp) | |
064af421 | 941 | { |
064af421 | 942 | struct sw_flow_actions *sf_acts; |
44e05eca | 943 | struct odp_flow_stats stats; |
cdee00fd | 944 | u32 actions_len; |
064af421 | 945 | |
1d7241c7 | 946 | spin_lock_bh(&flow->lock); |
65d042a1 | 947 | get_stats(flow, &stats); |
1d7241c7 | 948 | if (query_flags & ODPFF_ZERO_TCP_FLAGS) |
44e05eca | 949 | flow->tcp_flags = 0; |
1d7241c7 JG |
950 | |
951 | spin_unlock_bh(&flow->lock); | |
44e05eca | 952 | |
776f10ce | 953 | if (copy_to_user(ustats, &stats, sizeof(struct odp_flow_stats)) || |
cdee00fd | 954 | get_user(actions_len, actions_lenp)) |
064af421 BP |
955 | return -EFAULT; |
956 | ||
cdee00fd | 957 | if (!actions_len) |
064af421 | 958 | return 0; |
064af421 | 959 | |
d3c54451 JG |
960 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
961 | lockdep_is_held(&dp->mutex)); | |
cdee00fd | 962 | if (put_user(sf_acts->actions_len, actions_lenp) || |
064af421 | 963 | (actions && copy_to_user(actions, sf_acts->actions, |
cdee00fd | 964 | min(sf_acts->actions_len, actions_len)))) |
064af421 BP |
965 | return -EFAULT; |
966 | ||
967 | return 0; | |
968 | } | |
969 | ||
d3c54451 JG |
970 | static int answer_query(struct datapath *dp, struct sw_flow *flow, |
971 | u32 query_flags, struct odp_flow __user *ufp) | |
064af421 | 972 | { |
1b29ebe5 | 973 | struct nlattr __user *actions; |
064af421 | 974 | |
1b29ebe5 | 975 | if (get_user(actions, (struct nlattr __user * __user *)&ufp->actions)) |
064af421 | 976 | return -EFAULT; |
44e05eca | 977 | |
d3c54451 | 978 | return do_answer_query(dp, flow, query_flags, |
cdee00fd | 979 | &ufp->stats, actions, &ufp->actions_len); |
064af421 BP |
980 | } |
981 | ||
44e05eca | 982 | static struct sw_flow *do_del_flow(struct datapath *dp, struct odp_flow_key *key) |
064af421 | 983 | { |
9abaf6b3 | 984 | struct tbl *table = get_table_protected(dp); |
8d5ebd83 | 985 | struct tbl_node *flow_node; |
064af421 BP |
986 | int error; |
987 | ||
44e05eca | 988 | flow_node = tbl_lookup(table, key, flow_hash(key), flow_cmp); |
8d5ebd83 | 989 | if (!flow_node) |
44e05eca | 990 | return ERR_PTR(-ENOENT); |
064af421 | 991 | |
8d5ebd83 | 992 | error = tbl_remove(table, flow_node); |
f1aa2072 | 993 | if (error) |
44e05eca | 994 | return ERR_PTR(error); |
064af421 | 995 | |
44e05eca BP |
996 | /* XXX Returned flow_node's statistics might lose a few packets, since |
997 | * other CPUs can be using this flow. We used to synchronize_rcu() to | |
998 | * make sure that we get completely accurate stats, but that blows our | |
999 | * performance, badly. */ | |
1000 | return flow_cast(flow_node); | |
1001 | } | |
1002 | ||
1003 | static int del_flow(struct datapath *dp, struct odp_flow __user *ufp) | |
1004 | { | |
1005 | struct sw_flow *flow; | |
1006 | struct odp_flow uf; | |
1007 | int error; | |
1008 | ||
1009 | if (copy_from_user(&uf, ufp, sizeof uf)) | |
1010 | return -EFAULT; | |
1011 | ||
1012 | flow = do_del_flow(dp, &uf.key); | |
1013 | if (IS_ERR(flow)) | |
1014 | return PTR_ERR(flow); | |
8d5ebd83 | 1015 | |
d3c54451 | 1016 | error = answer_query(dp, flow, 0, ufp); |
f1aa2072 | 1017 | flow_deferred_free(flow); |
064af421 BP |
1018 | return error; |
1019 | } | |
1020 | ||
44e05eca | 1021 | static int do_query_flows(struct datapath *dp, const struct odp_flowvec *flowvec) |
064af421 | 1022 | { |
9abaf6b3 | 1023 | struct tbl *table = get_table_protected(dp); |
6d7568dc BP |
1024 | u32 i; |
1025 | ||
064af421 | 1026 | for (i = 0; i < flowvec->n_flows; i++) { |
6c229737 | 1027 | struct odp_flow __user *ufp = (struct odp_flow __user __force *)&flowvec->flows[i]; |
064af421 | 1028 | struct odp_flow uf; |
8d5ebd83 | 1029 | struct tbl_node *flow_node; |
064af421 BP |
1030 | int error; |
1031 | ||
776f10ce | 1032 | if (copy_from_user(&uf, ufp, sizeof uf)) |
064af421 | 1033 | return -EFAULT; |
064af421 | 1034 | |
8d5ebd83 JG |
1035 | flow_node = tbl_lookup(table, &uf.key, flow_hash(&uf.key), flow_cmp); |
1036 | if (!flow_node) | |
776f10ce | 1037 | error = put_user(ENOENT, &ufp->stats.error); |
064af421 | 1038 | else |
d3c54451 | 1039 | error = answer_query(dp, flow_cast(flow_node), uf.flags, ufp); |
064af421 BP |
1040 | if (error) |
1041 | return -EFAULT; | |
1042 | } | |
1043 | return flowvec->n_flows; | |
1044 | } | |
1045 | ||
1046 | struct list_flows_cbdata { | |
d3c54451 | 1047 | struct datapath *dp; |
064af421 | 1048 | struct odp_flow __user *uflows; |
6d7568dc BP |
1049 | u32 n_flows; |
1050 | u32 listed_flows; | |
064af421 BP |
1051 | }; |
1052 | ||
8d5ebd83 | 1053 | static int list_flow(struct tbl_node *node, void *cbdata_) |
064af421 | 1054 | { |
8d5ebd83 | 1055 | struct sw_flow *flow = flow_cast(node); |
064af421 BP |
1056 | struct list_flows_cbdata *cbdata = cbdata_; |
1057 | struct odp_flow __user *ufp = &cbdata->uflows[cbdata->listed_flows++]; | |
1058 | int error; | |
1059 | ||
776f10ce | 1060 | if (copy_to_user(&ufp->key, &flow->key, sizeof flow->key)) |
064af421 | 1061 | return -EFAULT; |
d3c54451 | 1062 | error = answer_query(cbdata->dp, flow, 0, ufp); |
064af421 BP |
1063 | if (error) |
1064 | return error; | |
1065 | ||
1066 | if (cbdata->listed_flows >= cbdata->n_flows) | |
1067 | return cbdata->listed_flows; | |
1068 | return 0; | |
1069 | } | |
1070 | ||
44e05eca | 1071 | static int do_list_flows(struct datapath *dp, const struct odp_flowvec *flowvec) |
064af421 BP |
1072 | { |
1073 | struct list_flows_cbdata cbdata; | |
1074 | int error; | |
1075 | ||
1076 | if (!flowvec->n_flows) | |
1077 | return 0; | |
1078 | ||
d3c54451 | 1079 | cbdata.dp = dp; |
6c229737 | 1080 | cbdata.uflows = (struct odp_flow __user __force*)flowvec->flows; |
064af421 BP |
1081 | cbdata.n_flows = flowvec->n_flows; |
1082 | cbdata.listed_flows = 0; | |
6bfafa55 | 1083 | |
9abaf6b3 | 1084 | error = tbl_foreach(get_table_protected(dp), list_flow, &cbdata); |
064af421 BP |
1085 | return error ? error : cbdata.listed_flows; |
1086 | } | |
1087 | ||
1088 | static int do_flowvec_ioctl(struct datapath *dp, unsigned long argp, | |
1089 | int (*function)(struct datapath *, | |
1090 | const struct odp_flowvec *)) | |
1091 | { | |
1092 | struct odp_flowvec __user *uflowvec; | |
1093 | struct odp_flowvec flowvec; | |
1094 | int retval; | |
1095 | ||
1096 | uflowvec = (struct odp_flowvec __user *)argp; | |
776f10ce | 1097 | if (copy_from_user(&flowvec, uflowvec, sizeof flowvec)) |
064af421 BP |
1098 | return -EFAULT; |
1099 | ||
1100 | if (flowvec.n_flows > INT_MAX / sizeof(struct odp_flow)) | |
1101 | return -EINVAL; | |
1102 | ||
064af421 BP |
1103 | retval = function(dp, &flowvec); |
1104 | return (retval < 0 ? retval | |
1105 | : retval == flowvec.n_flows ? 0 | |
776f10ce | 1106 | : put_user(retval, &uflowvec->n_flows)); |
064af421 BP |
1107 | } |
1108 | ||
44e05eca | 1109 | static int do_execute(struct datapath *dp, const struct odp_execute *execute) |
064af421 | 1110 | { |
064af421 BP |
1111 | struct odp_flow_key key; |
1112 | struct sk_buff *skb; | |
1113 | struct sw_flow_actions *actions; | |
a393b897 | 1114 | struct ethhdr *eth; |
b7a31ec1 | 1115 | bool is_frag; |
064af421 BP |
1116 | int err; |
1117 | ||
064af421 | 1118 | err = -EINVAL; |
44e05eca | 1119 | if (execute->length < ETH_HLEN || execute->length > 65535) |
064af421 BP |
1120 | goto error; |
1121 | ||
cdee00fd | 1122 | actions = flow_actions_alloc(execute->actions_len); |
8ba1fd2f JG |
1123 | if (IS_ERR(actions)) { |
1124 | err = PTR_ERR(actions); | |
064af421 | 1125 | goto error; |
8ba1fd2f | 1126 | } |
064af421 BP |
1127 | |
1128 | err = -EFAULT; | |
1b29ebe5 | 1129 | if (copy_from_user(actions->actions, |
6c229737 | 1130 | (struct nlattr __user __force *)execute->actions, execute->actions_len)) |
064af421 BP |
1131 | goto error_free_actions; |
1132 | ||
cdee00fd | 1133 | err = validate_actions(actions->actions, execute->actions_len); |
064af421 BP |
1134 | if (err) |
1135 | goto error_free_actions; | |
1136 | ||
1137 | err = -ENOMEM; | |
44e05eca | 1138 | skb = alloc_skb(execute->length, GFP_KERNEL); |
064af421 BP |
1139 | if (!skb) |
1140 | goto error_free_actions; | |
659586ef | 1141 | |
064af421 | 1142 | err = -EFAULT; |
1b29ebe5 | 1143 | if (copy_from_user(skb_put(skb, execute->length), |
6c229737 | 1144 | (const void __user __force *)execute->data, |
44e05eca | 1145 | execute->length)) |
064af421 BP |
1146 | goto error_free_skb; |
1147 | ||
a393b897 JP |
1148 | skb_reset_mac_header(skb); |
1149 | eth = eth_hdr(skb); | |
1150 | ||
de3f65ea JP |
1151 | /* Normally, setting the skb 'protocol' field would be handled by a |
1152 | * call to eth_type_trans(), but it assumes there's a sending | |
1153 | * device, which we may not have. */ | |
a393b897 JP |
1154 | if (ntohs(eth->h_proto) >= 1536) |
1155 | skb->protocol = eth->h_proto; | |
1156 | else | |
1157 | skb->protocol = htons(ETH_P_802_2); | |
1158 | ||
f1588b1f | 1159 | err = flow_extract(skb, -1, &key, &is_frag); |
4c1ad233 BP |
1160 | if (err) |
1161 | goto error_free_skb; | |
9dca7bd5 JG |
1162 | |
1163 | rcu_read_lock(); | |
cdee00fd | 1164 | err = execute_actions(dp, skb, &key, actions->actions, actions->actions_len); |
9dca7bd5 JG |
1165 | rcu_read_unlock(); |
1166 | ||
064af421 BP |
1167 | kfree(actions); |
1168 | return err; | |
1169 | ||
1170 | error_free_skb: | |
1171 | kfree_skb(skb); | |
1172 | error_free_actions: | |
1173 | kfree(actions); | |
1174 | error: | |
1175 | return err; | |
1176 | } | |
1177 | ||
44e05eca BP |
1178 | static int execute_packet(struct datapath *dp, const struct odp_execute __user *executep) |
1179 | { | |
1180 | struct odp_execute execute; | |
1181 | ||
1182 | if (copy_from_user(&execute, executep, sizeof execute)) | |
1183 | return -EFAULT; | |
1184 | ||
1185 | return do_execute(dp, &execute); | |
1186 | } | |
1187 | ||
16190191 | 1188 | static int get_dp_stats(struct datapath *dp, struct odp_stats __user *statsp) |
064af421 | 1189 | { |
9abaf6b3 | 1190 | struct tbl *table = get_table_protected(dp); |
064af421 BP |
1191 | struct odp_stats stats; |
1192 | int i; | |
1193 | ||
8d5ebd83 JG |
1194 | stats.n_flows = tbl_count(table); |
1195 | stats.cur_capacity = tbl_n_buckets(table); | |
1196 | stats.max_capacity = TBL_MAX_BUCKETS; | |
064af421 BP |
1197 | stats.n_ports = dp->n_ports; |
1198 | stats.max_ports = DP_MAX_PORTS; | |
064af421 BP |
1199 | stats.n_frags = stats.n_hit = stats.n_missed = stats.n_lost = 0; |
1200 | for_each_possible_cpu(i) { | |
38c6ecbc JG |
1201 | const struct dp_stats_percpu *percpu_stats; |
1202 | struct dp_stats_percpu local_stats; | |
1203 | unsigned seqcount; | |
1204 | ||
1205 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
1206 | ||
1207 | do { | |
1208 | seqcount = read_seqcount_begin(&percpu_stats->seqlock); | |
1209 | local_stats = *percpu_stats; | |
1210 | } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount)); | |
1211 | ||
1212 | stats.n_frags += local_stats.n_frags; | |
1213 | stats.n_hit += local_stats.n_hit; | |
1214 | stats.n_missed += local_stats.n_missed; | |
1215 | stats.n_lost += local_stats.n_lost; | |
064af421 BP |
1216 | } |
1217 | stats.max_miss_queue = DP_MAX_QUEUE_LEN; | |
1218 | stats.max_action_queue = DP_MAX_QUEUE_LEN; | |
1219 | return copy_to_user(statsp, &stats, sizeof stats) ? -EFAULT : 0; | |
1220 | } | |
1221 | ||
1dcf111b JP |
1222 | /* MTU of the dp pseudo-device: ETH_DATA_LEN or the minimum of the ports */ |
1223 | int dp_min_mtu(const struct datapath *dp) | |
1224 | { | |
e779d8d9 | 1225 | struct vport *p; |
1dcf111b JP |
1226 | int mtu = 0; |
1227 | ||
1228 | ASSERT_RTNL(); | |
1229 | ||
1230 | list_for_each_entry_rcu (p, &dp->port_list, node) { | |
f2459fe7 | 1231 | int dev_mtu; |
1dcf111b JP |
1232 | |
1233 | /* Skip any internal ports, since that's what we're trying to | |
1234 | * set. */ | |
e779d8d9 | 1235 | if (is_internal_vport(p)) |
1dcf111b JP |
1236 | continue; |
1237 | ||
e779d8d9 | 1238 | dev_mtu = vport_get_mtu(p); |
f2459fe7 JG |
1239 | if (!mtu || dev_mtu < mtu) |
1240 | mtu = dev_mtu; | |
1dcf111b JP |
1241 | } |
1242 | ||
1243 | return mtu ? mtu : ETH_DATA_LEN; | |
1244 | } | |
1245 | ||
f2459fe7 | 1246 | /* Sets the MTU of all datapath devices to the minimum of the ports. Must |
d8b5d43a | 1247 | * be called with RTNL lock. */ |
f2459fe7 | 1248 | void set_internal_devs_mtu(const struct datapath *dp) |
a7786963 | 1249 | { |
e779d8d9 | 1250 | struct vport *p; |
a7786963 JG |
1251 | int mtu; |
1252 | ||
1253 | ASSERT_RTNL(); | |
1254 | ||
a7786963 JG |
1255 | mtu = dp_min_mtu(dp); |
1256 | ||
1257 | list_for_each_entry_rcu (p, &dp->port_list, node) { | |
e779d8d9 BP |
1258 | if (is_internal_vport(p)) |
1259 | vport_set_mtu(p, mtu); | |
a7786963 JG |
1260 | } |
1261 | } | |
1262 | ||
e779d8d9 | 1263 | static int put_port(const struct vport *p, struct odp_port __user *uop) |
064af421 BP |
1264 | { |
1265 | struct odp_port op; | |
f2459fe7 | 1266 | |
064af421 | 1267 | memset(&op, 0, sizeof op); |
f2459fe7 JG |
1268 | |
1269 | rcu_read_lock(); | |
e779d8d9 BP |
1270 | strncpy(op.devname, vport_get_name(p), sizeof op.devname); |
1271 | strncpy(op.type, vport_get_type(p), sizeof op.type); | |
dd851cbb | 1272 | vport_get_config(p, op.config); |
f2459fe7 JG |
1273 | rcu_read_unlock(); |
1274 | ||
064af421 | 1275 | op.port = p->port_no; |
f2459fe7 | 1276 | |
064af421 BP |
1277 | return copy_to_user(uop, &op, sizeof op) ? -EFAULT : 0; |
1278 | } | |
1279 | ||
fceb2a5b | 1280 | static int query_port(struct datapath *dp, struct odp_port __user *uport) |
064af421 BP |
1281 | { |
1282 | struct odp_port port; | |
7e71ab66 | 1283 | struct vport *vport; |
064af421 BP |
1284 | |
1285 | if (copy_from_user(&port, uport, sizeof port)) | |
1286 | return -EFAULT; | |
f2459fe7 | 1287 | |
064af421 | 1288 | if (port.devname[0]) { |
064af421 BP |
1289 | port.devname[IFNAMSIZ - 1] = '\0'; |
1290 | ||
f2459fe7 | 1291 | vport_lock(); |
f2459fe7 | 1292 | vport = vport_locate(port.devname); |
f2459fe7 JG |
1293 | vport_unlock(); |
1294 | ||
7e71ab66 JG |
1295 | if (!vport) |
1296 | return -ENODEV; | |
1297 | if (vport->dp != dp) | |
1298 | return -ENOENT; | |
064af421 BP |
1299 | } else { |
1300 | if (port.port >= DP_MAX_PORTS) | |
1301 | return -EINVAL; | |
7e71ab66 JG |
1302 | |
1303 | vport = get_vport_protected(dp, port.port); | |
1304 | if (!vport) | |
064af421 | 1305 | return -ENOENT; |
064af421 | 1306 | } |
f2459fe7 | 1307 | |
7e71ab66 | 1308 | return put_port(vport, uport); |
064af421 BP |
1309 | } |
1310 | ||
fceb2a5b JG |
1311 | static int do_list_ports(struct datapath *dp, struct odp_port __user *uports, |
1312 | int n_ports) | |
064af421 | 1313 | { |
44e05eca BP |
1314 | int idx = 0; |
1315 | if (n_ports) { | |
e779d8d9 | 1316 | struct vport *p; |
064af421 | 1317 | |
064af421 | 1318 | list_for_each_entry_rcu (p, &dp->port_list, node) { |
44e05eca | 1319 | if (put_port(p, &uports[idx])) |
064af421 | 1320 | return -EFAULT; |
44e05eca | 1321 | if (idx++ >= n_ports) |
064af421 BP |
1322 | break; |
1323 | } | |
1324 | } | |
44e05eca BP |
1325 | return idx; |
1326 | } | |
1327 | ||
fceb2a5b | 1328 | static int list_ports(struct datapath *dp, struct odp_portvec __user *upv) |
44e05eca BP |
1329 | { |
1330 | struct odp_portvec pv; | |
1331 | int retval; | |
1332 | ||
1333 | if (copy_from_user(&pv, upv, sizeof pv)) | |
1334 | return -EFAULT; | |
1335 | ||
6c229737 | 1336 | retval = do_list_ports(dp, (struct odp_port __user __force *)pv.ports, |
1b29ebe5 | 1337 | pv.n_ports); |
44e05eca BP |
1338 | if (retval < 0) |
1339 | return retval; | |
1340 | ||
1341 | return put_user(retval, &upv->n_ports); | |
064af421 BP |
1342 | } |
1343 | ||
7c40efc9 BP |
1344 | static int get_listen_mask(const struct file *f) |
1345 | { | |
1346 | return (long)f->private_data; | |
1347 | } | |
1348 | ||
1349 | static void set_listen_mask(struct file *f, int listen_mask) | |
1350 | { | |
1351 | f->private_data = (void*)(long)listen_mask; | |
1352 | } | |
1353 | ||
064af421 BP |
1354 | static long openvswitch_ioctl(struct file *f, unsigned int cmd, |
1355 | unsigned long argp) | |
1356 | { | |
1357 | int dp_idx = iminor(f->f_dentry->d_inode); | |
1358 | struct datapath *dp; | |
1359 | int drop_frags, listeners, port_no; | |
72b06300 | 1360 | unsigned int sflow_probability; |
064af421 BP |
1361 | int err; |
1362 | ||
1363 | /* Handle commands with special locking requirements up front. */ | |
1364 | switch (cmd) { | |
1365 | case ODP_DP_CREATE: | |
e86c8696 BP |
1366 | err = create_dp(dp_idx, (char __user *)argp); |
1367 | goto exit; | |
064af421 BP |
1368 | |
1369 | case ODP_DP_DESTROY: | |
e86c8696 BP |
1370 | err = destroy_dp(dp_idx); |
1371 | goto exit; | |
064af421 | 1372 | |
c3827f61 | 1373 | case ODP_VPORT_ATTACH: |
f2459fe7 | 1374 | err = attach_port(dp_idx, (struct odp_port __user *)argp); |
e86c8696 | 1375 | goto exit; |
064af421 | 1376 | |
c3827f61 | 1377 | case ODP_VPORT_DETACH: |
064af421 | 1378 | err = get_user(port_no, (int __user *)argp); |
e86c8696 | 1379 | if (!err) |
f2459fe7 JG |
1380 | err = detach_port(dp_idx, port_no); |
1381 | goto exit; | |
1382 | ||
f2459fe7 | 1383 | case ODP_VPORT_MOD: |
c3827f61 | 1384 | err = vport_user_mod((struct odp_port __user *)argp); |
f2459fe7 JG |
1385 | goto exit; |
1386 | ||
1387 | case ODP_VPORT_STATS_GET: | |
61e89cd6 | 1388 | err = vport_user_stats_get((struct odp_vport_stats_req __user *)argp); |
f2459fe7 JG |
1389 | goto exit; |
1390 | ||
780e6207 JG |
1391 | case ODP_VPORT_STATS_SET: |
1392 | err = vport_user_stats_set((struct odp_vport_stats_req __user *)argp); | |
1393 | goto exit; | |
1394 | ||
f2459fe7 | 1395 | case ODP_VPORT_ETHER_GET: |
61e89cd6 | 1396 | err = vport_user_ether_get((struct odp_vport_ether __user *)argp); |
f2459fe7 JG |
1397 | goto exit; |
1398 | ||
1399 | case ODP_VPORT_ETHER_SET: | |
61e89cd6 | 1400 | err = vport_user_ether_set((struct odp_vport_ether __user *)argp); |
f2459fe7 JG |
1401 | goto exit; |
1402 | ||
1403 | case ODP_VPORT_MTU_GET: | |
61e89cd6 | 1404 | err = vport_user_mtu_get((struct odp_vport_mtu __user *)argp); |
f2459fe7 JG |
1405 | goto exit; |
1406 | ||
1407 | case ODP_VPORT_MTU_SET: | |
61e89cd6 | 1408 | err = vport_user_mtu_set((struct odp_vport_mtu __user *)argp); |
e86c8696 | 1409 | goto exit; |
064af421 BP |
1410 | } |
1411 | ||
1412 | dp = get_dp_locked(dp_idx); | |
e86c8696 | 1413 | err = -ENODEV; |
064af421 | 1414 | if (!dp) |
e86c8696 | 1415 | goto exit; |
064af421 BP |
1416 | |
1417 | switch (cmd) { | |
1418 | case ODP_DP_STATS: | |
1419 | err = get_dp_stats(dp, (struct odp_stats __user *)argp); | |
1420 | break; | |
1421 | ||
1422 | case ODP_GET_DROP_FRAGS: | |
1423 | err = put_user(dp->drop_frags, (int __user *)argp); | |
1424 | break; | |
1425 | ||
1426 | case ODP_SET_DROP_FRAGS: | |
1427 | err = get_user(drop_frags, (int __user *)argp); | |
1428 | if (err) | |
1429 | break; | |
1430 | err = -EINVAL; | |
1431 | if (drop_frags != 0 && drop_frags != 1) | |
1432 | break; | |
1433 | dp->drop_frags = drop_frags; | |
1434 | err = 0; | |
1435 | break; | |
1436 | ||
1437 | case ODP_GET_LISTEN_MASK: | |
7c40efc9 | 1438 | err = put_user(get_listen_mask(f), (int __user *)argp); |
064af421 BP |
1439 | break; |
1440 | ||
1441 | case ODP_SET_LISTEN_MASK: | |
1442 | err = get_user(listeners, (int __user *)argp); | |
1443 | if (err) | |
1444 | break; | |
1445 | err = -EINVAL; | |
1446 | if (listeners & ~ODPL_ALL) | |
1447 | break; | |
1448 | err = 0; | |
7c40efc9 | 1449 | set_listen_mask(f, listeners); |
064af421 BP |
1450 | break; |
1451 | ||
72b06300 BP |
1452 | case ODP_GET_SFLOW_PROBABILITY: |
1453 | err = put_user(dp->sflow_probability, (unsigned int __user *)argp); | |
1454 | break; | |
1455 | ||
1456 | case ODP_SET_SFLOW_PROBABILITY: | |
1457 | err = get_user(sflow_probability, (unsigned int __user *)argp); | |
1458 | if (!err) | |
1459 | dp->sflow_probability = sflow_probability; | |
1460 | break; | |
1461 | ||
c3827f61 | 1462 | case ODP_VPORT_QUERY: |
064af421 BP |
1463 | err = query_port(dp, (struct odp_port __user *)argp); |
1464 | break; | |
1465 | ||
c3827f61 | 1466 | case ODP_VPORT_LIST: |
064af421 BP |
1467 | err = list_ports(dp, (struct odp_portvec __user *)argp); |
1468 | break; | |
1469 | ||
064af421 BP |
1470 | case ODP_FLOW_FLUSH: |
1471 | err = flush_flows(dp); | |
1472 | break; | |
1473 | ||
1474 | case ODP_FLOW_PUT: | |
1475 | err = put_flow(dp, (struct odp_flow_put __user *)argp); | |
1476 | break; | |
1477 | ||
1478 | case ODP_FLOW_DEL: | |
f1aa2072 | 1479 | err = del_flow(dp, (struct odp_flow __user *)argp); |
064af421 BP |
1480 | break; |
1481 | ||
f1aa2072 | 1482 | case ODP_FLOW_GET: |
44e05eca | 1483 | err = do_flowvec_ioctl(dp, argp, do_query_flows); |
064af421 BP |
1484 | break; |
1485 | ||
1486 | case ODP_FLOW_LIST: | |
44e05eca | 1487 | err = do_flowvec_ioctl(dp, argp, do_list_flows); |
064af421 BP |
1488 | break; |
1489 | ||
1490 | case ODP_EXECUTE: | |
44e05eca | 1491 | err = execute_packet(dp, (struct odp_execute __user *)argp); |
064af421 BP |
1492 | break; |
1493 | ||
1494 | default: | |
1495 | err = -ENOIOCTLCMD; | |
1496 | break; | |
1497 | } | |
1498 | mutex_unlock(&dp->mutex); | |
e86c8696 | 1499 | exit: |
064af421 BP |
1500 | return err; |
1501 | } | |
1502 | ||
1503 | static int dp_has_packet_of_interest(struct datapath *dp, int listeners) | |
1504 | { | |
1505 | int i; | |
1506 | for (i = 0; i < DP_N_QUEUES; i++) { | |
1507 | if (listeners & (1 << i) && !skb_queue_empty(&dp->queues[i])) | |
1508 | return 1; | |
1509 | } | |
1510 | return 0; | |
1511 | } | |
1512 | ||
3fbd517a BP |
1513 | #ifdef CONFIG_COMPAT |
1514 | static int compat_list_ports(struct datapath *dp, struct compat_odp_portvec __user *upv) | |
1515 | { | |
1516 | struct compat_odp_portvec pv; | |
1517 | int retval; | |
1518 | ||
1519 | if (copy_from_user(&pv, upv, sizeof pv)) | |
1520 | return -EFAULT; | |
1521 | ||
1522 | retval = do_list_ports(dp, compat_ptr(pv.ports), pv.n_ports); | |
1523 | if (retval < 0) | |
1524 | return retval; | |
1525 | ||
1526 | return put_user(retval, &upv->n_ports); | |
1527 | } | |
1528 | ||
3fbd517a BP |
1529 | static int compat_get_flow(struct odp_flow *flow, const struct compat_odp_flow __user *compat) |
1530 | { | |
1531 | compat_uptr_t actions; | |
1532 | ||
1533 | if (!access_ok(VERIFY_READ, compat, sizeof(struct compat_odp_flow)) || | |
1534 | __copy_from_user(&flow->stats, &compat->stats, sizeof(struct odp_flow_stats)) || | |
1535 | __copy_from_user(&flow->key, &compat->key, sizeof(struct odp_flow_key)) || | |
1536 | __get_user(actions, &compat->actions) || | |
cdee00fd | 1537 | __get_user(flow->actions_len, &compat->actions_len) || |
3fbd517a BP |
1538 | __get_user(flow->flags, &compat->flags)) |
1539 | return -EFAULT; | |
1540 | ||
1b29ebe5 | 1541 | flow->actions = (struct nlattr __force *)compat_ptr(actions); |
3fbd517a BP |
1542 | return 0; |
1543 | } | |
1544 | ||
1545 | static int compat_put_flow(struct datapath *dp, struct compat_odp_flow_put __user *ufp) | |
1546 | { | |
1547 | struct odp_flow_stats stats; | |
1548 | struct odp_flow_put fp; | |
1549 | int error; | |
1550 | ||
1551 | if (compat_get_flow(&fp.flow, &ufp->flow) || | |
1552 | get_user(fp.flags, &ufp->flags)) | |
1553 | return -EFAULT; | |
1554 | ||
1555 | error = do_put_flow(dp, &fp, &stats); | |
1556 | if (error) | |
1557 | return error; | |
1558 | ||
1559 | if (copy_to_user(&ufp->flow.stats, &stats, | |
1560 | sizeof(struct odp_flow_stats))) | |
1561 | return -EFAULT; | |
1562 | ||
1563 | return 0; | |
1564 | } | |
1565 | ||
d3c54451 JG |
1566 | static int compat_answer_query(struct datapath *dp, struct sw_flow *flow, |
1567 | u32 query_flags, | |
3fbd517a BP |
1568 | struct compat_odp_flow __user *ufp) |
1569 | { | |
1570 | compat_uptr_t actions; | |
1571 | ||
1572 | if (get_user(actions, &ufp->actions)) | |
1573 | return -EFAULT; | |
1574 | ||
d3c54451 | 1575 | return do_answer_query(dp, flow, query_flags, &ufp->stats, |
cdee00fd | 1576 | compat_ptr(actions), &ufp->actions_len); |
3fbd517a BP |
1577 | } |
1578 | ||
1579 | static int compat_del_flow(struct datapath *dp, struct compat_odp_flow __user *ufp) | |
1580 | { | |
1581 | struct sw_flow *flow; | |
1582 | struct odp_flow uf; | |
1583 | int error; | |
1584 | ||
1585 | if (compat_get_flow(&uf, ufp)) | |
1586 | return -EFAULT; | |
1587 | ||
1588 | flow = do_del_flow(dp, &uf.key); | |
1589 | if (IS_ERR(flow)) | |
1590 | return PTR_ERR(flow); | |
1591 | ||
d3c54451 | 1592 | error = compat_answer_query(dp, flow, 0, ufp); |
3fbd517a BP |
1593 | flow_deferred_free(flow); |
1594 | return error; | |
1595 | } | |
1596 | ||
1b29ebe5 JG |
1597 | static int compat_query_flows(struct datapath *dp, |
1598 | struct compat_odp_flow __user *flows, | |
1599 | u32 n_flows) | |
3fbd517a | 1600 | { |
9abaf6b3 | 1601 | struct tbl *table = get_table_protected(dp); |
3fbd517a BP |
1602 | u32 i; |
1603 | ||
1604 | for (i = 0; i < n_flows; i++) { | |
1605 | struct compat_odp_flow __user *ufp = &flows[i]; | |
1606 | struct odp_flow uf; | |
1607 | struct tbl_node *flow_node; | |
1608 | int error; | |
1609 | ||
1610 | if (compat_get_flow(&uf, ufp)) | |
1611 | return -EFAULT; | |
3fbd517a BP |
1612 | |
1613 | flow_node = tbl_lookup(table, &uf.key, flow_hash(&uf.key), flow_cmp); | |
1614 | if (!flow_node) | |
1615 | error = put_user(ENOENT, &ufp->stats.error); | |
1616 | else | |
d3c54451 JG |
1617 | error = compat_answer_query(dp, flow_cast(flow_node), |
1618 | uf.flags, ufp); | |
3fbd517a BP |
1619 | if (error) |
1620 | return -EFAULT; | |
1621 | } | |
1622 | return n_flows; | |
1623 | } | |
1624 | ||
1625 | struct compat_list_flows_cbdata { | |
d3c54451 | 1626 | struct datapath *dp; |
3fbd517a BP |
1627 | struct compat_odp_flow __user *uflows; |
1628 | u32 n_flows; | |
1629 | u32 listed_flows; | |
1630 | }; | |
1631 | ||
1632 | static int compat_list_flow(struct tbl_node *node, void *cbdata_) | |
1633 | { | |
1634 | struct sw_flow *flow = flow_cast(node); | |
1635 | struct compat_list_flows_cbdata *cbdata = cbdata_; | |
1636 | struct compat_odp_flow __user *ufp = &cbdata->uflows[cbdata->listed_flows++]; | |
1637 | int error; | |
1638 | ||
1639 | if (copy_to_user(&ufp->key, &flow->key, sizeof flow->key)) | |
1640 | return -EFAULT; | |
d3c54451 | 1641 | error = compat_answer_query(cbdata->dp, flow, 0, ufp); |
3fbd517a BP |
1642 | if (error) |
1643 | return error; | |
1644 | ||
1645 | if (cbdata->listed_flows >= cbdata->n_flows) | |
1646 | return cbdata->listed_flows; | |
1647 | return 0; | |
1648 | } | |
1649 | ||
1b29ebe5 JG |
1650 | static int compat_list_flows(struct datapath *dp, |
1651 | struct compat_odp_flow __user *flows, u32 n_flows) | |
3fbd517a BP |
1652 | { |
1653 | struct compat_list_flows_cbdata cbdata; | |
1654 | int error; | |
1655 | ||
1656 | if (!n_flows) | |
1657 | return 0; | |
1658 | ||
d3c54451 | 1659 | cbdata.dp = dp; |
3fbd517a BP |
1660 | cbdata.uflows = flows; |
1661 | cbdata.n_flows = n_flows; | |
1662 | cbdata.listed_flows = 0; | |
6bfafa55 | 1663 | |
9abaf6b3 | 1664 | error = tbl_foreach(get_table_protected(dp), compat_list_flow, &cbdata); |
3fbd517a BP |
1665 | return error ? error : cbdata.listed_flows; |
1666 | } | |
1667 | ||
1668 | static int compat_flowvec_ioctl(struct datapath *dp, unsigned long argp, | |
1669 | int (*function)(struct datapath *, | |
1b29ebe5 | 1670 | struct compat_odp_flow __user *, |
3fbd517a BP |
1671 | u32 n_flows)) |
1672 | { | |
1673 | struct compat_odp_flowvec __user *uflowvec; | |
1674 | struct compat_odp_flow __user *flows; | |
1675 | struct compat_odp_flowvec flowvec; | |
1676 | int retval; | |
1677 | ||
1678 | uflowvec = compat_ptr(argp); | |
1679 | if (!access_ok(VERIFY_WRITE, uflowvec, sizeof *uflowvec) || | |
1680 | copy_from_user(&flowvec, uflowvec, sizeof flowvec)) | |
1681 | return -EFAULT; | |
1682 | ||
1683 | if (flowvec.n_flows > INT_MAX / sizeof(struct compat_odp_flow)) | |
1684 | return -EINVAL; | |
1685 | ||
1686 | flows = compat_ptr(flowvec.flows); | |
1687 | if (!access_ok(VERIFY_WRITE, flows, | |
1688 | flowvec.n_flows * sizeof(struct compat_odp_flow))) | |
1689 | return -EFAULT; | |
1690 | ||
1691 | retval = function(dp, flows, flowvec.n_flows); | |
1692 | return (retval < 0 ? retval | |
1693 | : retval == flowvec.n_flows ? 0 | |
1694 | : put_user(retval, &uflowvec->n_flows)); | |
1695 | } | |
1696 | ||
1697 | static int compat_execute(struct datapath *dp, const struct compat_odp_execute __user *uexecute) | |
1698 | { | |
1699 | struct odp_execute execute; | |
1700 | compat_uptr_t actions; | |
1701 | compat_uptr_t data; | |
1702 | ||
1703 | if (!access_ok(VERIFY_READ, uexecute, sizeof(struct compat_odp_execute)) || | |
3fbd517a | 1704 | __get_user(actions, &uexecute->actions) || |
cdee00fd | 1705 | __get_user(execute.actions_len, &uexecute->actions_len) || |
3fbd517a BP |
1706 | __get_user(data, &uexecute->data) || |
1707 | __get_user(execute.length, &uexecute->length)) | |
1708 | return -EFAULT; | |
1709 | ||
1b29ebe5 JG |
1710 | execute.actions = (struct nlattr __force *)compat_ptr(actions); |
1711 | execute.data = (const void __force *)compat_ptr(data); | |
3fbd517a BP |
1712 | |
1713 | return do_execute(dp, &execute); | |
1714 | } | |
1715 | ||
1716 | static long openvswitch_compat_ioctl(struct file *f, unsigned int cmd, unsigned long argp) | |
1717 | { | |
1718 | int dp_idx = iminor(f->f_dentry->d_inode); | |
1719 | struct datapath *dp; | |
1720 | int err; | |
1721 | ||
1722 | switch (cmd) { | |
1723 | case ODP_DP_DESTROY: | |
1724 | case ODP_FLOW_FLUSH: | |
1725 | /* Ioctls that don't need any translation at all. */ | |
1726 | return openvswitch_ioctl(f, cmd, argp); | |
1727 | ||
1728 | case ODP_DP_CREATE: | |
c3827f61 BP |
1729 | case ODP_VPORT_ATTACH: |
1730 | case ODP_VPORT_DETACH: | |
1731 | case ODP_VPORT_MOD: | |
3fbd517a BP |
1732 | case ODP_VPORT_MTU_SET: |
1733 | case ODP_VPORT_MTU_GET: | |
1734 | case ODP_VPORT_ETHER_SET: | |
1735 | case ODP_VPORT_ETHER_GET: | |
780e6207 | 1736 | case ODP_VPORT_STATS_SET: |
3fbd517a BP |
1737 | case ODP_VPORT_STATS_GET: |
1738 | case ODP_DP_STATS: | |
1739 | case ODP_GET_DROP_FRAGS: | |
1740 | case ODP_SET_DROP_FRAGS: | |
1741 | case ODP_SET_LISTEN_MASK: | |
1742 | case ODP_GET_LISTEN_MASK: | |
1743 | case ODP_SET_SFLOW_PROBABILITY: | |
1744 | case ODP_GET_SFLOW_PROBABILITY: | |
c3827f61 | 1745 | case ODP_VPORT_QUERY: |
3fbd517a BP |
1746 | /* Ioctls that just need their pointer argument extended. */ |
1747 | return openvswitch_ioctl(f, cmd, (unsigned long)compat_ptr(argp)); | |
3fbd517a BP |
1748 | } |
1749 | ||
1750 | dp = get_dp_locked(dp_idx); | |
1751 | err = -ENODEV; | |
1752 | if (!dp) | |
1753 | goto exit; | |
1754 | ||
1755 | switch (cmd) { | |
c3827f61 | 1756 | case ODP_VPORT_LIST32: |
3fbd517a BP |
1757 | err = compat_list_ports(dp, compat_ptr(argp)); |
1758 | break; | |
1759 | ||
3fbd517a BP |
1760 | case ODP_FLOW_PUT32: |
1761 | err = compat_put_flow(dp, compat_ptr(argp)); | |
1762 | break; | |
1763 | ||
1764 | case ODP_FLOW_DEL32: | |
1765 | err = compat_del_flow(dp, compat_ptr(argp)); | |
1766 | break; | |
1767 | ||
1768 | case ODP_FLOW_GET32: | |
1769 | err = compat_flowvec_ioctl(dp, argp, compat_query_flows); | |
1770 | break; | |
1771 | ||
1772 | case ODP_FLOW_LIST32: | |
1773 | err = compat_flowvec_ioctl(dp, argp, compat_list_flows); | |
1774 | break; | |
1775 | ||
1776 | case ODP_EXECUTE32: | |
1777 | err = compat_execute(dp, compat_ptr(argp)); | |
1778 | break; | |
1779 | ||
1780 | default: | |
1781 | err = -ENOIOCTLCMD; | |
1782 | break; | |
1783 | } | |
1784 | mutex_unlock(&dp->mutex); | |
1785 | exit: | |
1786 | return err; | |
1787 | } | |
1788 | #endif | |
1789 | ||
9cc8b4e4 JG |
1790 | /* Unfortunately this function is not exported so this is a verbatim copy |
1791 | * from net/core/datagram.c in 2.6.30. */ | |
1792 | static int skb_copy_and_csum_datagram(const struct sk_buff *skb, int offset, | |
1793 | u8 __user *to, int len, | |
1794 | __wsum *csump) | |
1795 | { | |
1796 | int start = skb_headlen(skb); | |
1797 | int pos = 0; | |
1798 | int i, copy = start - offset; | |
1799 | ||
1800 | /* Copy header. */ | |
1801 | if (copy > 0) { | |
1802 | int err = 0; | |
1803 | if (copy > len) | |
1804 | copy = len; | |
1805 | *csump = csum_and_copy_to_user(skb->data + offset, to, copy, | |
1806 | *csump, &err); | |
1807 | if (err) | |
1808 | goto fault; | |
1809 | if ((len -= copy) == 0) | |
1810 | return 0; | |
1811 | offset += copy; | |
1812 | to += copy; | |
1813 | pos = copy; | |
1814 | } | |
1815 | ||
1816 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1817 | int end; | |
1818 | ||
1819 | WARN_ON(start > offset + len); | |
1820 | ||
1821 | end = start + skb_shinfo(skb)->frags[i].size; | |
1822 | if ((copy = end - offset) > 0) { | |
1823 | __wsum csum2; | |
1824 | int err = 0; | |
1825 | u8 *vaddr; | |
1826 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1827 | struct page *page = frag->page; | |
1828 | ||
1829 | if (copy > len) | |
1830 | copy = len; | |
1831 | vaddr = kmap(page); | |
1832 | csum2 = csum_and_copy_to_user(vaddr + | |
1833 | frag->page_offset + | |
1834 | offset - start, | |
1835 | to, copy, 0, &err); | |
1836 | kunmap(page); | |
1837 | if (err) | |
1838 | goto fault; | |
1839 | *csump = csum_block_add(*csump, csum2, pos); | |
1840 | if (!(len -= copy)) | |
1841 | return 0; | |
1842 | offset += copy; | |
1843 | to += copy; | |
1844 | pos += copy; | |
1845 | } | |
1846 | start = end; | |
1847 | } | |
1848 | ||
1849 | if (skb_shinfo(skb)->frag_list) { | |
1850 | struct sk_buff *list = skb_shinfo(skb)->frag_list; | |
1851 | ||
1852 | for (; list; list=list->next) { | |
1853 | int end; | |
1854 | ||
1855 | WARN_ON(start > offset + len); | |
1856 | ||
1857 | end = start + list->len; | |
1858 | if ((copy = end - offset) > 0) { | |
1859 | __wsum csum2 = 0; | |
1860 | if (copy > len) | |
1861 | copy = len; | |
1862 | if (skb_copy_and_csum_datagram(list, | |
1863 | offset - start, | |
1864 | to, copy, | |
1865 | &csum2)) | |
1866 | goto fault; | |
1867 | *csump = csum_block_add(*csump, csum2, pos); | |
1868 | if ((len -= copy) == 0) | |
1869 | return 0; | |
1870 | offset += copy; | |
1871 | to += copy; | |
1872 | pos += copy; | |
1873 | } | |
1874 | start = end; | |
1875 | } | |
1876 | } | |
1877 | if (!len) | |
1878 | return 0; | |
1879 | ||
1880 | fault: | |
1881 | return -EFAULT; | |
1882 | } | |
1883 | ||
33b38b63 JG |
1884 | static ssize_t openvswitch_read(struct file *f, char __user *buf, |
1885 | size_t nbytes, loff_t *ppos) | |
064af421 | 1886 | { |
7c40efc9 | 1887 | int listeners = get_listen_mask(f); |
064af421 | 1888 | int dp_idx = iminor(f->f_dentry->d_inode); |
e22d4953 | 1889 | struct datapath *dp = get_dp_locked(dp_idx); |
064af421 | 1890 | struct sk_buff *skb; |
9cc8b4e4 | 1891 | size_t copy_bytes, tot_copy_bytes; |
064af421 BP |
1892 | int retval; |
1893 | ||
1894 | if (!dp) | |
1895 | return -ENODEV; | |
1896 | ||
1897 | if (nbytes == 0 || !listeners) | |
1898 | return 0; | |
1899 | ||
1900 | for (;;) { | |
1901 | int i; | |
1902 | ||
1903 | for (i = 0; i < DP_N_QUEUES; i++) { | |
1904 | if (listeners & (1 << i)) { | |
1905 | skb = skb_dequeue(&dp->queues[i]); | |
1906 | if (skb) | |
1907 | goto success; | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | if (f->f_flags & O_NONBLOCK) { | |
1912 | retval = -EAGAIN; | |
1913 | goto error; | |
1914 | } | |
1915 | ||
1916 | wait_event_interruptible(dp->waitqueue, | |
1917 | dp_has_packet_of_interest(dp, | |
1918 | listeners)); | |
1919 | ||
1920 | if (signal_pending(current)) { | |
1921 | retval = -ERESTARTSYS; | |
1922 | goto error; | |
1923 | } | |
1924 | } | |
1925 | success: | |
e22d4953 JG |
1926 | mutex_unlock(&dp->mutex); |
1927 | ||
9cc8b4e4 | 1928 | copy_bytes = tot_copy_bytes = min_t(size_t, skb->len, nbytes); |
d295e8e9 | 1929 | |
9cc8b4e4 JG |
1930 | retval = 0; |
1931 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
9fc10ed9 JG |
1932 | if (copy_bytes == skb->len) { |
1933 | __wsum csum = 0; | |
dd8d6b8c JG |
1934 | u16 csum_start, csum_offset; |
1935 | ||
1936 | get_skb_csum_pointers(skb, &csum_start, &csum_offset); | |
e0ce13c4 JG |
1937 | csum_start -= skb_headroom(skb); |
1938 | ||
f057cdda | 1939 | BUG_ON(csum_start >= skb_headlen(skb)); |
9cc8b4e4 JG |
1940 | retval = skb_copy_and_csum_datagram(skb, csum_start, buf + csum_start, |
1941 | copy_bytes - csum_start, &csum); | |
9cc8b4e4 JG |
1942 | if (!retval) { |
1943 | __sum16 __user *csump; | |
1944 | ||
1945 | copy_bytes = csum_start; | |
1946 | csump = (__sum16 __user *)(buf + csum_start + csum_offset); | |
f057cdda | 1947 | |
1b29ebe5 JG |
1948 | BUG_ON((char __user *)csump + sizeof(__sum16) > |
1949 | buf + nbytes); | |
9cc8b4e4 JG |
1950 | put_user(csum_fold(csum), csump); |
1951 | } | |
9fc10ed9 JG |
1952 | } else |
1953 | retval = skb_checksum_help(skb); | |
9cc8b4e4 JG |
1954 | } |
1955 | ||
1956 | if (!retval) { | |
1b29ebe5 | 1957 | struct iovec iov; |
9cc8b4e4 JG |
1958 | |
1959 | iov.iov_base = buf; | |
1960 | iov.iov_len = copy_bytes; | |
1961 | retval = skb_copy_datagram_iovec(skb, 0, &iov, iov.iov_len); | |
1962 | } | |
1963 | ||
064af421 | 1964 | if (!retval) |
9cc8b4e4 JG |
1965 | retval = tot_copy_bytes; |
1966 | ||
064af421 | 1967 | kfree_skb(skb); |
e22d4953 | 1968 | return retval; |
064af421 BP |
1969 | |
1970 | error: | |
e22d4953 | 1971 | mutex_unlock(&dp->mutex); |
064af421 BP |
1972 | return retval; |
1973 | } | |
1974 | ||
1975 | static unsigned int openvswitch_poll(struct file *file, poll_table *wait) | |
1976 | { | |
1977 | int dp_idx = iminor(file->f_dentry->d_inode); | |
e22d4953 | 1978 | struct datapath *dp = get_dp_locked(dp_idx); |
064af421 BP |
1979 | unsigned int mask; |
1980 | ||
1981 | if (dp) { | |
1982 | mask = 0; | |
1983 | poll_wait(file, &dp->waitqueue, wait); | |
7c40efc9 | 1984 | if (dp_has_packet_of_interest(dp, get_listen_mask(file))) |
064af421 | 1985 | mask |= POLLIN | POLLRDNORM; |
e22d4953 | 1986 | mutex_unlock(&dp->mutex); |
064af421 BP |
1987 | } else { |
1988 | mask = POLLIN | POLLRDNORM | POLLHUP; | |
1989 | } | |
1990 | return mask; | |
1991 | } | |
1992 | ||
33b38b63 | 1993 | static struct file_operations openvswitch_fops = { |
609af740 | 1994 | .owner = THIS_MODULE, |
064af421 BP |
1995 | .read = openvswitch_read, |
1996 | .poll = openvswitch_poll, | |
1997 | .unlocked_ioctl = openvswitch_ioctl, | |
3fbd517a BP |
1998 | #ifdef CONFIG_COMPAT |
1999 | .compat_ioctl = openvswitch_compat_ioctl, | |
2000 | #endif | |
064af421 BP |
2001 | }; |
2002 | ||
2003 | static int major; | |
22d24ebf | 2004 | |
22d24ebf BP |
2005 | static int __init dp_init(void) |
2006 | { | |
f2459fe7 | 2007 | struct sk_buff *dummy_skb; |
22d24ebf BP |
2008 | int err; |
2009 | ||
f2459fe7 | 2010 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb)); |
22d24ebf | 2011 | |
f2459fe7 | 2012 | printk("Open vSwitch %s, built "__DATE__" "__TIME__"\n", VERSION BUILDNR); |
064af421 BP |
2013 | |
2014 | err = flow_init(); | |
2015 | if (err) | |
2016 | goto error; | |
2017 | ||
f2459fe7 | 2018 | err = vport_init(); |
064af421 BP |
2019 | if (err) |
2020 | goto error_flow_exit; | |
2021 | ||
f2459fe7 JG |
2022 | err = register_netdevice_notifier(&dp_device_notifier); |
2023 | if (err) | |
2024 | goto error_vport_exit; | |
2025 | ||
064af421 BP |
2026 | major = register_chrdev(0, "openvswitch", &openvswitch_fops); |
2027 | if (err < 0) | |
2028 | goto error_unreg_notifier; | |
2029 | ||
064af421 BP |
2030 | return 0; |
2031 | ||
2032 | error_unreg_notifier: | |
2033 | unregister_netdevice_notifier(&dp_device_notifier); | |
f2459fe7 JG |
2034 | error_vport_exit: |
2035 | vport_exit(); | |
064af421 BP |
2036 | error_flow_exit: |
2037 | flow_exit(); | |
2038 | error: | |
2039 | return err; | |
2040 | } | |
2041 | ||
2042 | static void dp_cleanup(void) | |
2043 | { | |
2044 | rcu_barrier(); | |
2045 | unregister_chrdev(major, "openvswitch"); | |
2046 | unregister_netdevice_notifier(&dp_device_notifier); | |
f2459fe7 | 2047 | vport_exit(); |
064af421 | 2048 | flow_exit(); |
064af421 BP |
2049 | } |
2050 | ||
2051 | module_init(dp_init); | |
2052 | module_exit(dp_cleanup); | |
2053 | ||
2054 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2055 | MODULE_LICENSE("GPL"); |