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Commit | Line | Data |
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064af421 | 1 | /* |
f632c8fc | 2 | * Copyright (c) 2007, 2008, 2009, 2010, 2011 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> |
36956a7d | 44 | #include <net/genetlink.h> |
3fbd517a | 45 | #include <linux/compat.h> |
064af421 BP |
46 | |
47 | #include "openvswitch/datapath-protocol.h" | |
dd8d6b8c | 48 | #include "checksum.h" |
064af421 BP |
49 | #include "datapath.h" |
50 | #include "actions.h" | |
064af421 | 51 | #include "flow.h" |
7eaa9830 | 52 | #include "loop_counter.h" |
3fbd517a | 53 | #include "odp-compat.h" |
8d5ebd83 | 54 | #include "table.h" |
f2459fe7 | 55 | #include "vport-internal_dev.h" |
064af421 | 56 | |
064af421 BP |
57 | int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd); |
58 | EXPORT_SYMBOL(dp_ioctl_hook); | |
59 | ||
064af421 | 60 | /* Datapaths. Protected on the read side by rcu_read_lock, on the write side |
0d3b8a34 | 61 | * by dp_mutex. |
064af421 BP |
62 | * |
63 | * dp_mutex nests inside the RTNL lock: if you need both you must take the RTNL | |
64 | * lock first. | |
65 | * | |
e779d8d9 | 66 | * It is safe to access the datapath and vport structures with just |
064af421 BP |
67 | * dp_mutex. |
68 | */ | |
e1040c77 | 69 | static struct datapath __rcu *dps[ODP_MAX]; |
064af421 BP |
70 | static DEFINE_MUTEX(dp_mutex); |
71 | ||
e779d8d9 | 72 | static int new_vport(struct datapath *, struct odp_port *, int port_no); |
064af421 BP |
73 | |
74 | /* Must be called with rcu_read_lock or dp_mutex. */ | |
75 | struct datapath *get_dp(int dp_idx) | |
76 | { | |
77 | if (dp_idx < 0 || dp_idx >= ODP_MAX) | |
78 | return NULL; | |
eb3ccf11 JG |
79 | return rcu_dereference_check(dps[dp_idx], rcu_read_lock_held() || |
80 | lockdep_is_held(&dp_mutex)); | |
064af421 BP |
81 | } |
82 | EXPORT_SYMBOL_GPL(get_dp); | |
83 | ||
35f7605b | 84 | static struct datapath *get_dp_locked(int dp_idx) |
064af421 BP |
85 | { |
86 | struct datapath *dp; | |
87 | ||
88 | mutex_lock(&dp_mutex); | |
89 | dp = get_dp(dp_idx); | |
90 | if (dp) | |
91 | mutex_lock(&dp->mutex); | |
92 | mutex_unlock(&dp_mutex); | |
93 | return dp; | |
94 | } | |
95 | ||
027f9007 | 96 | static struct tbl *get_table_protected(struct datapath *dp) |
9abaf6b3 | 97 | { |
1452b28c JG |
98 | return rcu_dereference_protected(dp->table, |
99 | lockdep_is_held(&dp->mutex)); | |
100 | } | |
101 | ||
027f9007 | 102 | static struct vport *get_vport_protected(struct datapath *dp, u16 port_no) |
1452b28c JG |
103 | { |
104 | return rcu_dereference_protected(dp->ports[port_no], | |
105 | lockdep_is_held(&dp->mutex)); | |
9abaf6b3 JG |
106 | } |
107 | ||
f2459fe7 JG |
108 | /* Must be called with rcu_read_lock or RTNL lock. */ |
109 | const char *dp_name(const struct datapath *dp) | |
110 | { | |
ad919711 | 111 | return vport_get_name(rcu_dereference_rtnl(dp->ports[ODPP_LOCAL])); |
f2459fe7 JG |
112 | } |
113 | ||
064af421 BP |
114 | static inline size_t br_nlmsg_size(void) |
115 | { | |
116 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
117 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
118 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
119 | + nla_total_size(4) /* IFLA_MASTER */ | |
120 | + nla_total_size(4) /* IFLA_MTU */ | |
121 | + nla_total_size(4) /* IFLA_LINK */ | |
122 | + nla_total_size(1); /* IFLA_OPERSTATE */ | |
123 | } | |
124 | ||
125 | static int dp_fill_ifinfo(struct sk_buff *skb, | |
e779d8d9 | 126 | const struct vport *port, |
064af421 BP |
127 | int event, unsigned int flags) |
128 | { | |
027f9007 | 129 | struct datapath *dp = port->dp; |
e779d8d9 BP |
130 | int ifindex = vport_get_ifindex(port); |
131 | int iflink = vport_get_iflink(port); | |
064af421 BP |
132 | struct ifinfomsg *hdr; |
133 | struct nlmsghdr *nlh; | |
134 | ||
f2459fe7 JG |
135 | if (ifindex < 0) |
136 | return ifindex; | |
137 | ||
138 | if (iflink < 0) | |
139 | return iflink; | |
140 | ||
064af421 BP |
141 | nlh = nlmsg_put(skb, 0, 0, event, sizeof(*hdr), flags); |
142 | if (nlh == NULL) | |
143 | return -EMSGSIZE; | |
144 | ||
145 | hdr = nlmsg_data(nlh); | |
146 | hdr->ifi_family = AF_BRIDGE; | |
147 | hdr->__ifi_pad = 0; | |
f2459fe7 JG |
148 | hdr->ifi_type = ARPHRD_ETHER; |
149 | hdr->ifi_index = ifindex; | |
e779d8d9 | 150 | hdr->ifi_flags = vport_get_flags(port); |
064af421 BP |
151 | hdr->ifi_change = 0; |
152 | ||
e779d8d9 | 153 | NLA_PUT_STRING(skb, IFLA_IFNAME, vport_get_name(port)); |
ad919711 | 154 | NLA_PUT_U32(skb, IFLA_MASTER, |
1452b28c | 155 | vport_get_ifindex(get_vport_protected(dp, ODPP_LOCAL))); |
e779d8d9 | 156 | NLA_PUT_U32(skb, IFLA_MTU, vport_get_mtu(port)); |
064af421 BP |
157 | #ifdef IFLA_OPERSTATE |
158 | NLA_PUT_U8(skb, IFLA_OPERSTATE, | |
e779d8d9 BP |
159 | vport_is_running(port) |
160 | ? vport_get_operstate(port) | |
f2459fe7 | 161 | : IF_OPER_DOWN); |
064af421 BP |
162 | #endif |
163 | ||
e779d8d9 | 164 | NLA_PUT(skb, IFLA_ADDRESS, ETH_ALEN, vport_get_addr(port)); |
064af421 | 165 | |
f2459fe7 JG |
166 | if (ifindex != iflink) |
167 | NLA_PUT_U32(skb, IFLA_LINK,iflink); | |
064af421 BP |
168 | |
169 | return nlmsg_end(skb, nlh); | |
170 | ||
171 | nla_put_failure: | |
172 | nlmsg_cancel(skb, nlh); | |
173 | return -EMSGSIZE; | |
174 | } | |
175 | ||
e779d8d9 | 176 | static void dp_ifinfo_notify(int event, struct vport *port) |
064af421 | 177 | { |
064af421 BP |
178 | struct sk_buff *skb; |
179 | int err = -ENOBUFS; | |
180 | ||
181 | skb = nlmsg_new(br_nlmsg_size(), GFP_KERNEL); | |
182 | if (skb == NULL) | |
183 | goto errout; | |
184 | ||
185 | err = dp_fill_ifinfo(skb, port, event, 0); | |
186 | if (err < 0) { | |
187 | /* -EMSGSIZE implies BUG in br_nlmsg_size() */ | |
188 | WARN_ON(err == -EMSGSIZE); | |
189 | kfree_skb(skb); | |
190 | goto errout; | |
191 | } | |
f2459fe7 | 192 | rtnl_notify(skb, &init_net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); |
cfe7c1f5 | 193 | return; |
064af421 BP |
194 | errout: |
195 | if (err < 0) | |
f2459fe7 | 196 | rtnl_set_sk_err(&init_net, RTNLGRP_LINK, err); |
064af421 BP |
197 | } |
198 | ||
58c342f6 BP |
199 | static void release_dp(struct kobject *kobj) |
200 | { | |
201 | struct datapath *dp = container_of(kobj, struct datapath, ifobj); | |
202 | kfree(dp); | |
203 | } | |
204 | ||
35f7605b | 205 | static struct kobj_type dp_ktype = { |
58c342f6 BP |
206 | .release = release_dp |
207 | }; | |
208 | ||
064af421 BP |
209 | static int create_dp(int dp_idx, const char __user *devnamep) |
210 | { | |
f2459fe7 | 211 | struct odp_port internal_dev_port; |
064af421 BP |
212 | char devname[IFNAMSIZ]; |
213 | struct datapath *dp; | |
214 | int err; | |
215 | int i; | |
216 | ||
217 | if (devnamep) { | |
968f7c8d BP |
218 | int retval = strncpy_from_user(devname, devnamep, IFNAMSIZ); |
219 | if (retval < 0) { | |
220 | err = -EFAULT; | |
064af421 | 221 | goto err; |
968f7c8d BP |
222 | } else if (retval >= IFNAMSIZ) { |
223 | err = -ENAMETOOLONG; | |
224 | goto err; | |
225 | } | |
064af421 | 226 | } else { |
84c17d98 | 227 | snprintf(devname, sizeof(devname), "of%d", dp_idx); |
064af421 BP |
228 | } |
229 | ||
230 | rtnl_lock(); | |
231 | mutex_lock(&dp_mutex); | |
232 | err = -ENODEV; | |
233 | if (!try_module_get(THIS_MODULE)) | |
234 | goto err_unlock; | |
235 | ||
236 | /* Exit early if a datapath with that number already exists. | |
237 | * (We don't use -EEXIST because that's ambiguous with 'devname' | |
238 | * conflicting with an existing network device name.) */ | |
239 | err = -EBUSY; | |
240 | if (get_dp(dp_idx)) | |
241 | goto err_put_module; | |
242 | ||
243 | err = -ENOMEM; | |
84c17d98 | 244 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); |
064af421 BP |
245 | if (dp == NULL) |
246 | goto err_put_module; | |
828bc1f0 | 247 | INIT_LIST_HEAD(&dp->port_list); |
064af421 | 248 | mutex_init(&dp->mutex); |
f072ebdd | 249 | mutex_lock(&dp->mutex); |
064af421 BP |
250 | dp->dp_idx = dp_idx; |
251 | for (i = 0; i < DP_N_QUEUES; i++) | |
252 | skb_queue_head_init(&dp->queues[i]); | |
253 | init_waitqueue_head(&dp->waitqueue); | |
254 | ||
58c342f6 | 255 | /* Initialize kobject for bridge. This will be added as |
b0c32774 | 256 | * /sys/class/net/<devname>/brif later, if sysfs is enabled. */ |
58c342f6 | 257 | dp->ifobj.kset = NULL; |
58c342f6 BP |
258 | kobject_init(&dp->ifobj, &dp_ktype); |
259 | ||
828bc1f0 BP |
260 | /* Allocate table. */ |
261 | err = -ENOMEM; | |
c6fadeb1 | 262 | rcu_assign_pointer(dp->table, tbl_create(TBL_MIN_BUCKETS)); |
828bc1f0 BP |
263 | if (!dp->table) |
264 | goto err_free_dp; | |
265 | ||
d6fbec6d | 266 | /* Set up our datapath device. */ |
092a872d BP |
267 | BUILD_BUG_ON(sizeof(internal_dev_port.devname) != sizeof(devname)); |
268 | strcpy(internal_dev_port.devname, devname); | |
c3827f61 | 269 | strcpy(internal_dev_port.type, "internal"); |
e779d8d9 | 270 | err = new_vport(dp, &internal_dev_port, ODPP_LOCAL); |
828bc1f0 | 271 | if (err) { |
f2459fe7 JG |
272 | if (err == -EBUSY) |
273 | err = -EEXIST; | |
274 | ||
064af421 | 275 | goto err_destroy_table; |
828bc1f0 | 276 | } |
064af421 BP |
277 | |
278 | dp->drop_frags = 0; | |
279 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); | |
94947cd8 JG |
280 | if (!dp->stats_percpu) { |
281 | err = -ENOMEM; | |
064af421 | 282 | goto err_destroy_local_port; |
94947cd8 | 283 | } |
064af421 BP |
284 | |
285 | rcu_assign_pointer(dps[dp_idx], dp); | |
dad80ec3 JG |
286 | dp_sysfs_add_dp(dp); |
287 | ||
f072ebdd | 288 | mutex_unlock(&dp->mutex); |
064af421 BP |
289 | mutex_unlock(&dp_mutex); |
290 | rtnl_unlock(); | |
291 | ||
064af421 BP |
292 | return 0; |
293 | ||
294 | err_destroy_local_port: | |
1452b28c | 295 | dp_detach_port(get_vport_protected(dp, ODPP_LOCAL)); |
064af421 | 296 | err_destroy_table: |
6f20002c | 297 | tbl_destroy(get_table_protected(dp), NULL); |
064af421 | 298 | err_free_dp: |
f072ebdd | 299 | mutex_unlock(&dp->mutex); |
064af421 BP |
300 | kfree(dp); |
301 | err_put_module: | |
302 | module_put(THIS_MODULE); | |
303 | err_unlock: | |
304 | mutex_unlock(&dp_mutex); | |
305 | rtnl_unlock(); | |
306 | err: | |
307 | return err; | |
308 | } | |
309 | ||
46c6a11d JG |
310 | static void destroy_dp_rcu(struct rcu_head *rcu) |
311 | { | |
312 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
313 | int i; | |
314 | ||
315 | for (i = 0; i < DP_N_QUEUES; i++) | |
316 | skb_queue_purge(&dp->queues[i]); | |
317 | ||
318 | tbl_destroy((struct tbl __force *)dp->table, flow_free_tbl); | |
319 | free_percpu(dp->stats_percpu); | |
320 | kobject_put(&dp->ifobj); | |
321 | } | |
322 | ||
8f843b6f | 323 | static int destroy_dp(int dp_idx) |
064af421 | 324 | { |
8f843b6f JG |
325 | struct datapath *dp; |
326 | int err = 0; | |
e779d8d9 | 327 | struct vport *p, *n; |
064af421 | 328 | |
8f843b6f JG |
329 | rtnl_lock(); |
330 | mutex_lock(&dp_mutex); | |
331 | dp = get_dp(dp_idx); | |
332 | if (!dp) { | |
333 | err = -ENODEV; | |
b0fb95ac | 334 | goto out; |
8f843b6f JG |
335 | } |
336 | ||
b0fb95ac JG |
337 | mutex_lock(&dp->mutex); |
338 | ||
6fba0d0b BP |
339 | list_for_each_entry_safe (p, n, &dp->port_list, node) |
340 | if (p->port_no != ODPP_LOCAL) | |
c3827f61 | 341 | dp_detach_port(p); |
6fba0d0b | 342 | |
2ba9026e | 343 | dp_sysfs_del_dp(dp); |
064af421 | 344 | rcu_assign_pointer(dps[dp->dp_idx], NULL); |
1452b28c | 345 | dp_detach_port(get_vport_protected(dp, ODPP_LOCAL)); |
8f843b6f | 346 | |
b0fb95ac | 347 | mutex_unlock(&dp->mutex); |
46c6a11d | 348 | call_rcu(&dp->rcu, destroy_dp_rcu); |
064af421 | 349 | module_put(THIS_MODULE); |
064af421 | 350 | |
b0fb95ac | 351 | out: |
064af421 BP |
352 | mutex_unlock(&dp_mutex); |
353 | rtnl_unlock(); | |
064af421 BP |
354 | return err; |
355 | } | |
356 | ||
f072ebdd | 357 | /* Called with RTNL lock and dp->mutex. */ |
e779d8d9 | 358 | static int new_vport(struct datapath *dp, struct odp_port *odp_port, int port_no) |
064af421 | 359 | { |
c3827f61 | 360 | struct vport_parms parms; |
f2459fe7 | 361 | struct vport *vport; |
f2459fe7 | 362 | |
c3827f61 BP |
363 | parms.name = odp_port->devname; |
364 | parms.type = odp_port->type; | |
365 | parms.config = odp_port->config; | |
e779d8d9 BP |
366 | parms.dp = dp; |
367 | parms.port_no = port_no; | |
f2459fe7 | 368 | |
c3827f61 BP |
369 | vport_lock(); |
370 | vport = vport_add(&parms); | |
371 | vport_unlock(); | |
064af421 | 372 | |
c3827f61 BP |
373 | if (IS_ERR(vport)) |
374 | return PTR_ERR(vport); | |
064af421 | 375 | |
e779d8d9 BP |
376 | rcu_assign_pointer(dp->ports[port_no], vport); |
377 | list_add_rcu(&vport->node, &dp->port_list); | |
064af421 BP |
378 | dp->n_ports++; |
379 | ||
e779d8d9 | 380 | dp_ifinfo_notify(RTM_NEWLINK, vport); |
064af421 BP |
381 | |
382 | return 0; | |
383 | } | |
384 | ||
f2459fe7 | 385 | static int attach_port(int dp_idx, struct odp_port __user *portp) |
064af421 | 386 | { |
064af421 BP |
387 | struct datapath *dp; |
388 | struct odp_port port; | |
389 | int port_no; | |
390 | int err; | |
391 | ||
392 | err = -EFAULT; | |
84c17d98 | 393 | if (copy_from_user(&port, portp, sizeof(port))) |
064af421 BP |
394 | goto out; |
395 | port.devname[IFNAMSIZ - 1] = '\0'; | |
c3827f61 | 396 | port.type[VPORT_TYPE_SIZE - 1] = '\0'; |
064af421 BP |
397 | |
398 | rtnl_lock(); | |
399 | dp = get_dp_locked(dp_idx); | |
400 | err = -ENODEV; | |
401 | if (!dp) | |
402 | goto out_unlock_rtnl; | |
403 | ||
9ee3ae3e BP |
404 | for (port_no = 1; port_no < DP_MAX_PORTS; port_no++) |
405 | if (!dp->ports[port_no]) | |
406 | goto got_port_no; | |
3c71830a | 407 | err = -EFBIG; |
9ee3ae3e | 408 | goto out_unlock_dp; |
064af421 | 409 | |
9ee3ae3e | 410 | got_port_no: |
e779d8d9 | 411 | err = new_vport(dp, &port, port_no); |
064af421 | 412 | if (err) |
f2459fe7 | 413 | goto out_unlock_dp; |
064af421 | 414 | |
d8b5d43a | 415 | set_internal_devs_mtu(dp); |
1452b28c | 416 | dp_sysfs_add_if(get_vport_protected(dp, port_no)); |
064af421 | 417 | |
776f10ce | 418 | err = put_user(port_no, &portp->port); |
064af421 | 419 | |
064af421 BP |
420 | out_unlock_dp: |
421 | mutex_unlock(&dp->mutex); | |
422 | out_unlock_rtnl: | |
423 | rtnl_unlock(); | |
424 | out: | |
425 | return err; | |
426 | } | |
427 | ||
e779d8d9 | 428 | int dp_detach_port(struct vport *p) |
064af421 | 429 | { |
f2459fe7 JG |
430 | int err; |
431 | ||
064af421 BP |
432 | ASSERT_RTNL(); |
433 | ||
2e7dd8ec | 434 | if (p->port_no != ODPP_LOCAL) |
0515ceb3 | 435 | dp_sysfs_del_if(p); |
064af421 BP |
436 | dp_ifinfo_notify(RTM_DELLINK, p); |
437 | ||
064af421 | 438 | /* First drop references to device. */ |
f2459fe7 | 439 | p->dp->n_ports--; |
064af421 BP |
440 | list_del_rcu(&p->node); |
441 | rcu_assign_pointer(p->dp->ports[p->port_no], NULL); | |
f2459fe7 | 442 | |
7237e4f4 | 443 | /* Then destroy it. */ |
c3827f61 | 444 | vport_lock(); |
7237e4f4 | 445 | err = vport_del(p); |
c3827f61 | 446 | vport_unlock(); |
f2459fe7 | 447 | |
7237e4f4 | 448 | return err; |
064af421 BP |
449 | } |
450 | ||
f2459fe7 | 451 | static int detach_port(int dp_idx, int port_no) |
064af421 | 452 | { |
e779d8d9 | 453 | struct vport *p; |
064af421 | 454 | struct datapath *dp; |
064af421 BP |
455 | int err; |
456 | ||
457 | err = -EINVAL; | |
458 | if (port_no < 0 || port_no >= DP_MAX_PORTS || port_no == ODPP_LOCAL) | |
459 | goto out; | |
460 | ||
461 | rtnl_lock(); | |
462 | dp = get_dp_locked(dp_idx); | |
463 | err = -ENODEV; | |
464 | if (!dp) | |
465 | goto out_unlock_rtnl; | |
466 | ||
1452b28c | 467 | p = get_vport_protected(dp, port_no); |
064af421 BP |
468 | err = -ENOENT; |
469 | if (!p) | |
470 | goto out_unlock_dp; | |
471 | ||
c3827f61 | 472 | err = dp_detach_port(p); |
064af421 BP |
473 | |
474 | out_unlock_dp: | |
475 | mutex_unlock(&dp->mutex); | |
476 | out_unlock_rtnl: | |
477 | rtnl_unlock(); | |
478 | out: | |
064af421 BP |
479 | return err; |
480 | } | |
481 | ||
8819fac7 | 482 | /* Must be called with rcu_read_lock. */ |
e779d8d9 | 483 | void dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
484 | { |
485 | struct datapath *dp = p->dp; | |
486 | struct dp_stats_percpu *stats; | |
8819fac7 | 487 | int stats_counter_off; |
55574bb0 BP |
488 | struct sw_flow_actions *acts; |
489 | struct loop_counter *loop; | |
4c1ad233 | 490 | int error; |
064af421 | 491 | |
e779d8d9 | 492 | OVS_CB(skb)->vport = p; |
a063b0df | 493 | |
3976f6d5 | 494 | if (!OVS_CB(skb)->flow) { |
36956a7d | 495 | struct sw_flow_key key; |
3976f6d5 | 496 | struct tbl_node *flow_node; |
b7a31ec1 | 497 | bool is_frag; |
4c1ad233 | 498 | |
3976f6d5 | 499 | /* Extract flow from 'skb' into 'key'. */ |
b7a31ec1 | 500 | error = flow_extract(skb, p ? p->port_no : ODPP_NONE, &key, &is_frag); |
3976f6d5 JG |
501 | if (unlikely(error)) { |
502 | kfree_skb(skb); | |
503 | return; | |
504 | } | |
064af421 | 505 | |
b7a31ec1 | 506 | if (is_frag && dp->drop_frags) { |
3976f6d5 JG |
507 | kfree_skb(skb); |
508 | stats_counter_off = offsetof(struct dp_stats_percpu, n_frags); | |
509 | goto out; | |
510 | } | |
511 | ||
512 | /* Look up flow. */ | |
513 | flow_node = tbl_lookup(rcu_dereference(dp->table), &key, | |
514 | flow_hash(&key), flow_cmp); | |
515 | if (unlikely(!flow_node)) { | |
856081f6 BP |
516 | struct dp_upcall_info upcall; |
517 | ||
518 | upcall.type = _ODPL_MISS_NR; | |
519 | upcall.key = &key; | |
520 | upcall.userdata = 0; | |
521 | upcall.sample_pool = 0; | |
522 | upcall.actions = NULL; | |
523 | upcall.actions_len = 0; | |
524 | dp_upcall(dp, skb, &upcall); | |
3976f6d5 JG |
525 | stats_counter_off = offsetof(struct dp_stats_percpu, n_missed); |
526 | goto out; | |
527 | } | |
528 | ||
529 | OVS_CB(skb)->flow = flow_cast(flow_node); | |
55574bb0 BP |
530 | } |
531 | ||
f267de8a | 532 | stats_counter_off = offsetof(struct dp_stats_percpu, n_hit); |
3976f6d5 | 533 | flow_used(OVS_CB(skb)->flow, skb); |
55574bb0 | 534 | |
3976f6d5 | 535 | acts = rcu_dereference(OVS_CB(skb)->flow->sf_acts); |
55574bb0 BP |
536 | |
537 | /* Check whether we've looped too much. */ | |
7eaa9830 JG |
538 | loop = loop_get_counter(); |
539 | if (unlikely(++loop->count > MAX_LOOPS)) | |
55574bb0 BP |
540 | loop->looping = true; |
541 | if (unlikely(loop->looping)) { | |
7eaa9830 | 542 | loop_suppress(dp, acts); |
f267de8a | 543 | kfree_skb(skb); |
55574bb0 | 544 | goto out_loop; |
064af421 | 545 | } |
8819fac7 | 546 | |
55574bb0 | 547 | /* Execute actions. */ |
3976f6d5 | 548 | execute_actions(dp, skb, &OVS_CB(skb)->flow->key, acts->actions, |
cdee00fd | 549 | acts->actions_len); |
55574bb0 BP |
550 | |
551 | /* Check whether sub-actions looped too much. */ | |
552 | if (unlikely(loop->looping)) | |
7eaa9830 | 553 | loop_suppress(dp, acts); |
55574bb0 BP |
554 | |
555 | out_loop: | |
556 | /* Decrement loop counter. */ | |
557 | if (!--loop->count) | |
558 | loop->looping = false; | |
7eaa9830 | 559 | loop_put_counter(); |
55574bb0 | 560 | |
8819fac7 | 561 | out: |
55574bb0 | 562 | /* Update datapath statistics. */ |
8819fac7 JG |
563 | local_bh_disable(); |
564 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); | |
38c6ecbc JG |
565 | |
566 | write_seqcount_begin(&stats->seqlock); | |
8819fac7 | 567 | (*(u64 *)((u8 *)stats + stats_counter_off))++; |
38c6ecbc JG |
568 | write_seqcount_end(&stats->seqlock); |
569 | ||
8819fac7 | 570 | local_bh_enable(); |
064af421 BP |
571 | } |
572 | ||
856081f6 BP |
573 | static void copy_and_csum_skb(struct sk_buff *skb, void *to) |
574 | { | |
575 | u16 csum_start, csum_offset; | |
576 | __wsum csum; | |
577 | ||
578 | get_skb_csum_pointers(skb, &csum_start, &csum_offset); | |
579 | csum_start -= skb_headroom(skb); | |
580 | BUG_ON(csum_start >= skb_headlen(skb)); | |
581 | ||
582 | skb_copy_bits(skb, 0, to, csum_start); | |
583 | ||
584 | csum = skb_copy_and_csum_bits(skb, csum_start, to + csum_start, | |
585 | skb->len - csum_start, 0); | |
586 | *(__sum16 *)(to + csum_start + csum_offset) = csum_fold(csum); | |
587 | } | |
588 | ||
cb5087ca BP |
589 | /* Append each packet in 'skb' list to 'queue'. There will be only one packet |
590 | * unless we broke up a GSO packet. */ | |
856081f6 BP |
591 | static int queue_control_packets(struct datapath *dp, struct sk_buff *skb, |
592 | const struct dp_upcall_info *upcall_info) | |
cb5087ca BP |
593 | { |
594 | struct sk_buff *nskb; | |
595 | int port_no; | |
596 | int err; | |
597 | ||
e779d8d9 BP |
598 | if (OVS_CB(skb)->vport) |
599 | port_no = OVS_CB(skb)->vport->port_no; | |
f2459fe7 JG |
600 | else |
601 | port_no = ODPP_LOCAL; | |
cb5087ca BP |
602 | |
603 | do { | |
856081f6 BP |
604 | struct odp_packet *upcall; |
605 | struct sk_buff *user_skb; /* to be queued to userspace */ | |
606 | struct nlattr *nla; | |
607 | unsigned int len; | |
cb5087ca BP |
608 | |
609 | nskb = skb->next; | |
610 | skb->next = NULL; | |
611 | ||
856081f6 BP |
612 | len = sizeof(struct odp_packet); |
613 | len += nla_total_size(4); /* ODP_PACKET_ATTR_TYPE. */ | |
614 | len += nla_total_size(skb->len); | |
615 | len += nla_total_size(FLOW_BUFSIZE); | |
616 | if (upcall_info->userdata) | |
617 | len += nla_total_size(8); | |
618 | if (upcall_info->sample_pool) | |
619 | len += nla_total_size(4); | |
620 | if (upcall_info->actions_len) | |
621 | len += nla_total_size(upcall_info->actions_len); | |
622 | ||
623 | user_skb = alloc_skb(len, GFP_ATOMIC); | |
624 | if (!user_skb) | |
cb5087ca BP |
625 | goto err_kfree_skbs; |
626 | ||
856081f6 BP |
627 | upcall = (struct odp_packet *)__skb_put(user_skb, sizeof(*upcall)); |
628 | upcall->dp_idx = dp->dp_idx; | |
629 | ||
630 | nla_put_u32(user_skb, ODP_PACKET_ATTR_TYPE, upcall_info->type); | |
631 | ||
632 | nla = nla_nest_start(user_skb, ODP_PACKET_ATTR_KEY); | |
633 | flow_to_nlattrs(upcall_info->key, user_skb); | |
634 | nla_nest_end(user_skb, nla); | |
cb5087ca | 635 | |
856081f6 BP |
636 | if (upcall_info->userdata) |
637 | nla_put_u64(user_skb, ODP_PACKET_ATTR_USERDATA, upcall_info->userdata); | |
638 | if (upcall_info->sample_pool) | |
639 | nla_put_u32(user_skb, ODP_PACKET_ATTR_SAMPLE_POOL, upcall_info->sample_pool); | |
640 | if (upcall_info->actions_len) { | |
641 | const struct nlattr *actions = upcall_info->actions; | |
642 | u32 actions_len = upcall_info->actions_len; | |
643 | ||
644 | nla = nla_nest_start(user_skb, ODP_PACKET_ATTR_ACTIONS); | |
645 | memcpy(__skb_put(user_skb, actions_len), actions, actions_len); | |
646 | nla_nest_end(user_skb, nla); | |
647 | } | |
648 | ||
649 | nla = __nla_reserve(user_skb, ODP_PACKET_ATTR_PACKET, skb->len); | |
650 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
651 | copy_and_csum_skb(skb, nla_data(nla)); | |
652 | else | |
653 | skb_copy_bits(skb, 0, nla_data(nla), skb->len); | |
654 | ||
655 | upcall->len = user_skb->len; | |
656 | skb_queue_tail(&dp->queues[upcall_info->type], user_skb); | |
657 | ||
658 | kfree_skb(skb); | |
cb5087ca BP |
659 | skb = nskb; |
660 | } while (skb); | |
661 | return 0; | |
662 | ||
663 | err_kfree_skbs: | |
664 | kfree_skb(skb); | |
665 | while ((skb = nskb) != NULL) { | |
666 | nskb = skb->next; | |
667 | kfree_skb(skb); | |
668 | } | |
669 | return err; | |
670 | } | |
671 | ||
856081f6 | 672 | int dp_upcall(struct datapath *dp, struct sk_buff *skb, const struct dp_upcall_info *upcall_info) |
064af421 BP |
673 | { |
674 | struct dp_stats_percpu *stats; | |
675 | struct sk_buff_head *queue; | |
064af421 BP |
676 | int err; |
677 | ||
678 | WARN_ON_ONCE(skb_shared(skb)); | |
856081f6 BP |
679 | BUG_ON(upcall_info->type >= DP_N_QUEUES); |
680 | ||
681 | queue = &dp->queues[upcall_info->type]; | |
064af421 BP |
682 | err = -ENOBUFS; |
683 | if (skb_queue_len(queue) >= DP_MAX_QUEUE_LEN) | |
684 | goto err_kfree_skb; | |
685 | ||
a6057323 JG |
686 | forward_ip_summed(skb); |
687 | ||
a2377e44 JG |
688 | err = vswitch_skb_checksum_setup(skb); |
689 | if (err) | |
690 | goto err_kfree_skb; | |
691 | ||
064af421 BP |
692 | /* Break apart GSO packets into their component pieces. Otherwise |
693 | * userspace may try to stuff a 64kB packet into a 1500-byte MTU. */ | |
694 | if (skb_is_gso(skb)) { | |
9cc8b4e4 | 695 | struct sk_buff *nskb = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM); |
2d7ce2ee JG |
696 | |
697 | kfree_skb(skb); | |
698 | skb = nskb; | |
40796b34 | 699 | if (IS_ERR(skb)) { |
2d7ce2ee JG |
700 | err = PTR_ERR(skb); |
701 | goto err; | |
064af421 BP |
702 | } |
703 | } | |
704 | ||
856081f6 | 705 | err = queue_control_packets(dp, skb, upcall_info); |
064af421 | 706 | wake_up_interruptible(&dp->waitqueue); |
cb5087ca | 707 | return err; |
064af421 BP |
708 | |
709 | err_kfree_skb: | |
710 | kfree_skb(skb); | |
711 | err: | |
1c075d0a JG |
712 | local_bh_disable(); |
713 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); | |
38c6ecbc JG |
714 | |
715 | write_seqcount_begin(&stats->seqlock); | |
064af421 | 716 | stats->n_lost++; |
38c6ecbc JG |
717 | write_seqcount_end(&stats->seqlock); |
718 | ||
1c075d0a | 719 | local_bh_enable(); |
064af421 BP |
720 | |
721 | return err; | |
722 | } | |
723 | ||
724 | static int flush_flows(struct datapath *dp) | |
725 | { | |
9abaf6b3 | 726 | struct tbl *old_table = get_table_protected(dp); |
8d5ebd83 JG |
727 | struct tbl *new_table; |
728 | ||
c6fadeb1 | 729 | new_table = tbl_create(TBL_MIN_BUCKETS); |
8d5ebd83 JG |
730 | if (!new_table) |
731 | return -ENOMEM; | |
732 | ||
733 | rcu_assign_pointer(dp->table, new_table); | |
734 | ||
735 | tbl_deferred_destroy(old_table, flow_free_tbl); | |
736 | ||
737 | return 0; | |
064af421 BP |
738 | } |
739 | ||
cdee00fd | 740 | static int validate_actions(const struct nlattr *actions, u32 actions_len) |
064af421 | 741 | { |
23cad98c BP |
742 | const struct nlattr *a; |
743 | int rem; | |
744 | ||
745 | nla_for_each_attr(a, actions, actions_len, rem) { | |
746 | static const u32 action_lens[ODPAT_MAX + 1] = { | |
747 | [ODPAT_OUTPUT] = 4, | |
748 | [ODPAT_CONTROLLER] = 8, | |
749 | [ODPAT_SET_DL_TCI] = 2, | |
750 | [ODPAT_STRIP_VLAN] = 0, | |
751 | [ODPAT_SET_DL_SRC] = ETH_ALEN, | |
752 | [ODPAT_SET_DL_DST] = ETH_ALEN, | |
753 | [ODPAT_SET_NW_SRC] = 4, | |
754 | [ODPAT_SET_NW_DST] = 4, | |
755 | [ODPAT_SET_NW_TOS] = 1, | |
756 | [ODPAT_SET_TP_SRC] = 2, | |
757 | [ODPAT_SET_TP_DST] = 2, | |
758 | [ODPAT_SET_TUNNEL] = 8, | |
759 | [ODPAT_SET_PRIORITY] = 4, | |
760 | [ODPAT_POP_PRIORITY] = 0, | |
761 | [ODPAT_DROP_SPOOFED_ARP] = 0, | |
762 | }; | |
763 | int type = nla_type(a); | |
764 | ||
765 | if (type > ODPAT_MAX || nla_len(a) != action_lens[type]) | |
766 | return -EINVAL; | |
767 | ||
768 | switch (type) { | |
cdee00fd BP |
769 | case ODPAT_UNSPEC: |
770 | return -EINVAL; | |
064af421 | 771 | |
23cad98c BP |
772 | case ODPAT_CONTROLLER: |
773 | case ODPAT_STRIP_VLAN: | |
774 | case ODPAT_SET_DL_SRC: | |
775 | case ODPAT_SET_DL_DST: | |
776 | case ODPAT_SET_NW_SRC: | |
777 | case ODPAT_SET_NW_DST: | |
778 | case ODPAT_SET_TP_SRC: | |
779 | case ODPAT_SET_TP_DST: | |
780 | case ODPAT_SET_TUNNEL: | |
781 | case ODPAT_SET_PRIORITY: | |
782 | case ODPAT_POP_PRIORITY: | |
783 | case ODPAT_DROP_SPOOFED_ARP: | |
784 | /* No validation needed. */ | |
785 | break; | |
786 | ||
787 | case ODPAT_OUTPUT: | |
788 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
789 | return -EINVAL; | |
3b1fc5f3 | 790 | break; |
cdee00fd | 791 | |
23cad98c | 792 | case ODPAT_SET_DL_TCI: |
cdee00fd | 793 | if (nla_get_be16(a) & htons(VLAN_CFI_MASK)) |
064af421 | 794 | return -EINVAL; |
23cad98c | 795 | break; |
064af421 | 796 | |
23cad98c BP |
797 | case ODPAT_SET_NW_TOS: |
798 | if (nla_get_u8(a) & INET_ECN_MASK) | |
799 | return -EINVAL; | |
800 | break; | |
064af421 | 801 | |
23cad98c BP |
802 | default: |
803 | return -EOPNOTSUPP; | |
804 | } | |
805 | } | |
3c5f6de3 | 806 | |
23cad98c BP |
807 | if (rem > 0) |
808 | return -EINVAL; | |
064af421 | 809 | |
23cad98c | 810 | return 0; |
064af421 BP |
811 | } |
812 | ||
813 | static struct sw_flow_actions *get_actions(const struct odp_flow *flow) | |
814 | { | |
815 | struct sw_flow_actions *actions; | |
816 | int error; | |
817 | ||
cdee00fd | 818 | actions = flow_actions_alloc(flow->actions_len); |
064af421 BP |
819 | error = PTR_ERR(actions); |
820 | if (IS_ERR(actions)) | |
821 | goto error; | |
822 | ||
823 | error = -EFAULT; | |
1b29ebe5 | 824 | if (copy_from_user(actions->actions, |
6c229737 | 825 | (struct nlattr __user __force *)flow->actions, |
1b29ebe5 | 826 | flow->actions_len)) |
064af421 | 827 | goto error_free_actions; |
cdee00fd | 828 | error = validate_actions(actions->actions, actions->actions_len); |
064af421 BP |
829 | if (error) |
830 | goto error_free_actions; | |
831 | ||
832 | return actions; | |
833 | ||
834 | error_free_actions: | |
835 | kfree(actions); | |
836 | error: | |
837 | return ERR_PTR(error); | |
838 | } | |
839 | ||
65d042a1 | 840 | static void get_stats(struct sw_flow *flow, struct odp_flow_stats *stats) |
6bfafa55 JG |
841 | { |
842 | if (flow->used) { | |
65d042a1 | 843 | struct timespec offset_ts, used, now_mono; |
6bfafa55 | 844 | |
65d042a1 HZ |
845 | ktime_get_ts(&now_mono); |
846 | jiffies_to_timespec(jiffies - flow->used, &offset_ts); | |
847 | set_normalized_timespec(&used, now_mono.tv_sec - offset_ts.tv_sec, | |
848 | now_mono.tv_nsec - offset_ts.tv_nsec); | |
6bfafa55 JG |
849 | |
850 | stats->used_sec = used.tv_sec; | |
851 | stats->used_nsec = used.tv_nsec; | |
064af421 BP |
852 | } else { |
853 | stats->used_sec = 0; | |
854 | stats->used_nsec = 0; | |
855 | } | |
6bfafa55 | 856 | |
064af421 BP |
857 | stats->n_packets = flow->packet_count; |
858 | stats->n_bytes = flow->byte_count; | |
abfec865 | 859 | stats->reserved = 0; |
064af421 | 860 | stats->tcp_flags = flow->tcp_flags; |
f1aa2072 | 861 | stats->error = 0; |
064af421 BP |
862 | } |
863 | ||
864 | static void clear_stats(struct sw_flow *flow) | |
865 | { | |
6bfafa55 | 866 | flow->used = 0; |
064af421 | 867 | flow->tcp_flags = 0; |
064af421 BP |
868 | flow->packet_count = 0; |
869 | flow->byte_count = 0; | |
870 | } | |
871 | ||
8d5ebd83 JG |
872 | static int expand_table(struct datapath *dp) |
873 | { | |
9abaf6b3 | 874 | struct tbl *old_table = get_table_protected(dp); |
8d5ebd83 JG |
875 | struct tbl *new_table; |
876 | ||
877 | new_table = tbl_expand(old_table); | |
878 | if (IS_ERR(new_table)) | |
879 | return PTR_ERR(new_table); | |
880 | ||
881 | rcu_assign_pointer(dp->table, new_table); | |
882 | tbl_deferred_destroy(old_table, NULL); | |
883 | ||
884 | return 0; | |
885 | } | |
886 | ||
44e05eca BP |
887 | static int do_put_flow(struct datapath *dp, struct odp_flow_put *uf, |
888 | struct odp_flow_stats *stats) | |
064af421 | 889 | { |
8d5ebd83 | 890 | struct tbl_node *flow_node; |
36956a7d | 891 | struct sw_flow_key key; |
6fa58f7a | 892 | struct sw_flow *flow; |
8d5ebd83 | 893 | struct tbl *table; |
3d82583c | 894 | struct sw_flow_actions *acts = NULL; |
064af421 | 895 | int error; |
58f8f0e7 | 896 | u32 hash; |
064af421 | 897 | |
36956a7d BP |
898 | error = flow_copy_from_user(&key, (const struct nlattr __force __user *)uf->flow.key, |
899 | uf->flow.key_len); | |
900 | if (error) | |
901 | return error; | |
902 | ||
903 | hash = flow_hash(&key); | |
9abaf6b3 | 904 | table = get_table_protected(dp); |
36956a7d | 905 | flow_node = tbl_lookup(table, &key, hash, flow_cmp); |
8d5ebd83 | 906 | if (!flow_node) { |
6fa58f7a | 907 | /* No such flow. */ |
064af421 | 908 | error = -ENOENT; |
44e05eca | 909 | if (!(uf->flags & ODPPF_CREATE)) |
064af421 BP |
910 | goto error; |
911 | ||
912 | /* Expand table, if necessary, to make room. */ | |
8d5ebd83 JG |
913 | if (tbl_count(table) >= tbl_n_buckets(table)) { |
914 | error = expand_table(dp); | |
064af421 BP |
915 | if (error) |
916 | goto error; | |
9abaf6b3 | 917 | table = get_table_protected(dp); |
064af421 BP |
918 | } |
919 | ||
920 | /* Allocate flow. */ | |
560e8022 JG |
921 | flow = flow_alloc(); |
922 | if (IS_ERR(flow)) { | |
923 | error = PTR_ERR(flow); | |
064af421 | 924 | goto error; |
560e8022 | 925 | } |
36956a7d | 926 | flow->key = key; |
064af421 BP |
927 | clear_stats(flow); |
928 | ||
929 | /* Obtain actions. */ | |
44e05eca | 930 | acts = get_actions(&uf->flow); |
064af421 BP |
931 | error = PTR_ERR(acts); |
932 | if (IS_ERR(acts)) | |
933 | goto error_free_flow; | |
934 | rcu_assign_pointer(flow->sf_acts, acts); | |
935 | ||
936 | /* Put flow in bucket. */ | |
58f8f0e7 | 937 | error = tbl_insert(table, &flow->tbl_node, hash); |
6fa58f7a BP |
938 | if (error) |
939 | goto error_free_flow_acts; | |
8d5ebd83 | 940 | |
44e05eca | 941 | memset(stats, 0, sizeof(struct odp_flow_stats)); |
064af421 BP |
942 | } else { |
943 | /* We found a matching flow. */ | |
064af421 | 944 | struct sw_flow_actions *old_acts, *new_acts; |
064af421 | 945 | |
8d5ebd83 JG |
946 | flow = flow_cast(flow_node); |
947 | ||
064af421 BP |
948 | /* Bail out if we're not allowed to modify an existing flow. */ |
949 | error = -EEXIST; | |
44e05eca | 950 | if (!(uf->flags & ODPPF_MODIFY)) |
064af421 BP |
951 | goto error; |
952 | ||
953 | /* Swap actions. */ | |
44e05eca | 954 | new_acts = get_actions(&uf->flow); |
064af421 BP |
955 | error = PTR_ERR(new_acts); |
956 | if (IS_ERR(new_acts)) | |
957 | goto error; | |
d3c54451 JG |
958 | |
959 | old_acts = rcu_dereference_protected(flow->sf_acts, | |
960 | lockdep_is_held(&dp->mutex)); | |
cdee00fd | 961 | if (old_acts->actions_len != new_acts->actions_len || |
064af421 | 962 | memcmp(old_acts->actions, new_acts->actions, |
cdee00fd | 963 | old_acts->actions_len)) { |
064af421 BP |
964 | rcu_assign_pointer(flow->sf_acts, new_acts); |
965 | flow_deferred_free_acts(old_acts); | |
966 | } else { | |
967 | kfree(new_acts); | |
968 | } | |
969 | ||
970 | /* Fetch stats, then clear them if necessary. */ | |
1d7241c7 | 971 | spin_lock_bh(&flow->lock); |
65d042a1 | 972 | get_stats(flow, stats); |
44e05eca | 973 | if (uf->flags & ODPPF_ZERO_STATS) |
064af421 | 974 | clear_stats(flow); |
1d7241c7 | 975 | spin_unlock_bh(&flow->lock); |
064af421 BP |
976 | } |
977 | ||
064af421 BP |
978 | return 0; |
979 | ||
6fa58f7a | 980 | error_free_flow_acts: |
3d82583c | 981 | kfree(acts); |
064af421 | 982 | error_free_flow: |
fb8c9347 JG |
983 | flow->sf_acts = NULL; |
984 | flow_put(flow); | |
064af421 BP |
985 | error: |
986 | return error; | |
987 | } | |
988 | ||
44e05eca BP |
989 | static int put_flow(struct datapath *dp, struct odp_flow_put __user *ufp) |
990 | { | |
991 | struct odp_flow_stats stats; | |
992 | struct odp_flow_put uf; | |
993 | int error; | |
994 | ||
995 | if (copy_from_user(&uf, ufp, sizeof(struct odp_flow_put))) | |
996 | return -EFAULT; | |
997 | ||
998 | error = do_put_flow(dp, &uf, &stats); | |
999 | if (error) | |
1000 | return error; | |
1001 | ||
776f10ce BP |
1002 | if (copy_to_user(&ufp->flow.stats, &stats, |
1003 | sizeof(struct odp_flow_stats))) | |
44e05eca BP |
1004 | return -EFAULT; |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
d3c54451 JG |
1009 | static int do_answer_query(struct datapath *dp, struct sw_flow *flow, |
1010 | u32 query_flags, | |
44e05eca | 1011 | struct odp_flow_stats __user *ustats, |
cdee00fd BP |
1012 | struct nlattr __user *actions, |
1013 | u32 __user *actions_lenp) | |
064af421 | 1014 | { |
064af421 | 1015 | struct sw_flow_actions *sf_acts; |
44e05eca | 1016 | struct odp_flow_stats stats; |
cdee00fd | 1017 | u32 actions_len; |
064af421 | 1018 | |
1d7241c7 | 1019 | spin_lock_bh(&flow->lock); |
65d042a1 | 1020 | get_stats(flow, &stats); |
1d7241c7 | 1021 | if (query_flags & ODPFF_ZERO_TCP_FLAGS) |
44e05eca | 1022 | flow->tcp_flags = 0; |
1d7241c7 JG |
1023 | |
1024 | spin_unlock_bh(&flow->lock); | |
44e05eca | 1025 | |
776f10ce | 1026 | if (copy_to_user(ustats, &stats, sizeof(struct odp_flow_stats)) || |
cdee00fd | 1027 | get_user(actions_len, actions_lenp)) |
064af421 BP |
1028 | return -EFAULT; |
1029 | ||
cdee00fd | 1030 | if (!actions_len) |
064af421 | 1031 | return 0; |
064af421 | 1032 | |
d3c54451 JG |
1033 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
1034 | lockdep_is_held(&dp->mutex)); | |
cdee00fd | 1035 | if (put_user(sf_acts->actions_len, actions_lenp) || |
064af421 | 1036 | (actions && copy_to_user(actions, sf_acts->actions, |
cdee00fd | 1037 | min(sf_acts->actions_len, actions_len)))) |
064af421 BP |
1038 | return -EFAULT; |
1039 | ||
1040 | return 0; | |
1041 | } | |
1042 | ||
d3c54451 JG |
1043 | static int answer_query(struct datapath *dp, struct sw_flow *flow, |
1044 | u32 query_flags, struct odp_flow __user *ufp) | |
064af421 | 1045 | { |
1b29ebe5 | 1046 | struct nlattr __user *actions; |
064af421 | 1047 | |
1b29ebe5 | 1048 | if (get_user(actions, (struct nlattr __user * __user *)&ufp->actions)) |
064af421 | 1049 | return -EFAULT; |
44e05eca | 1050 | |
d3c54451 | 1051 | return do_answer_query(dp, flow, query_flags, |
cdee00fd | 1052 | &ufp->stats, actions, &ufp->actions_len); |
064af421 BP |
1053 | } |
1054 | ||
36956a7d | 1055 | static struct sw_flow *do_del_flow(struct datapath *dp, const struct nlattr __user *key, u32 key_len) |
064af421 | 1056 | { |
9abaf6b3 | 1057 | struct tbl *table = get_table_protected(dp); |
8d5ebd83 | 1058 | struct tbl_node *flow_node; |
36956a7d | 1059 | struct sw_flow_key swkey; |
064af421 BP |
1060 | int error; |
1061 | ||
36956a7d BP |
1062 | error = flow_copy_from_user(&swkey, key, key_len); |
1063 | if (error) | |
1064 | return ERR_PTR(error); | |
1065 | ||
1066 | flow_node = tbl_lookup(table, &swkey, flow_hash(&swkey), flow_cmp); | |
8d5ebd83 | 1067 | if (!flow_node) |
44e05eca | 1068 | return ERR_PTR(-ENOENT); |
064af421 | 1069 | |
8d5ebd83 | 1070 | error = tbl_remove(table, flow_node); |
f1aa2072 | 1071 | if (error) |
44e05eca | 1072 | return ERR_PTR(error); |
064af421 | 1073 | |
44e05eca BP |
1074 | /* XXX Returned flow_node's statistics might lose a few packets, since |
1075 | * other CPUs can be using this flow. We used to synchronize_rcu() to | |
1076 | * make sure that we get completely accurate stats, but that blows our | |
1077 | * performance, badly. */ | |
1078 | return flow_cast(flow_node); | |
1079 | } | |
1080 | ||
1081 | static int del_flow(struct datapath *dp, struct odp_flow __user *ufp) | |
1082 | { | |
1083 | struct sw_flow *flow; | |
1084 | struct odp_flow uf; | |
1085 | int error; | |
1086 | ||
84c17d98 | 1087 | if (copy_from_user(&uf, ufp, sizeof(uf))) |
44e05eca BP |
1088 | return -EFAULT; |
1089 | ||
36956a7d | 1090 | flow = do_del_flow(dp, (const struct nlattr __force __user *)uf.key, uf.key_len); |
44e05eca BP |
1091 | if (IS_ERR(flow)) |
1092 | return PTR_ERR(flow); | |
8d5ebd83 | 1093 | |
d3c54451 | 1094 | error = answer_query(dp, flow, 0, ufp); |
f1aa2072 | 1095 | flow_deferred_free(flow); |
064af421 BP |
1096 | return error; |
1097 | } | |
1098 | ||
44e05eca | 1099 | static int do_query_flows(struct datapath *dp, const struct odp_flowvec *flowvec) |
064af421 | 1100 | { |
9abaf6b3 | 1101 | struct tbl *table = get_table_protected(dp); |
6d7568dc BP |
1102 | u32 i; |
1103 | ||
064af421 | 1104 | for (i = 0; i < flowvec->n_flows; i++) { |
6c229737 | 1105 | struct odp_flow __user *ufp = (struct odp_flow __user __force *)&flowvec->flows[i]; |
36956a7d | 1106 | struct sw_flow_key key; |
064af421 | 1107 | struct odp_flow uf; |
8d5ebd83 | 1108 | struct tbl_node *flow_node; |
064af421 BP |
1109 | int error; |
1110 | ||
84c17d98 | 1111 | if (copy_from_user(&uf, ufp, sizeof(uf))) |
064af421 | 1112 | return -EFAULT; |
064af421 | 1113 | |
36956a7d BP |
1114 | error = flow_copy_from_user(&key, (const struct nlattr __force __user *)uf.key, uf.key_len); |
1115 | if (error) | |
1116 | return error; | |
1117 | ||
1118 | flow_node = tbl_lookup(table, &uf.key, flow_hash(&key), flow_cmp); | |
8d5ebd83 | 1119 | if (!flow_node) |
776f10ce | 1120 | error = put_user(ENOENT, &ufp->stats.error); |
064af421 | 1121 | else |
d3c54451 | 1122 | error = answer_query(dp, flow_cast(flow_node), uf.flags, ufp); |
064af421 BP |
1123 | if (error) |
1124 | return -EFAULT; | |
1125 | } | |
1126 | return flowvec->n_flows; | |
1127 | } | |
1128 | ||
064af421 BP |
1129 | static int do_flowvec_ioctl(struct datapath *dp, unsigned long argp, |
1130 | int (*function)(struct datapath *, | |
1131 | const struct odp_flowvec *)) | |
1132 | { | |
1133 | struct odp_flowvec __user *uflowvec; | |
1134 | struct odp_flowvec flowvec; | |
1135 | int retval; | |
1136 | ||
1137 | uflowvec = (struct odp_flowvec __user *)argp; | |
84c17d98 | 1138 | if (copy_from_user(&flowvec, uflowvec, sizeof(flowvec))) |
064af421 BP |
1139 | return -EFAULT; |
1140 | ||
1141 | if (flowvec.n_flows > INT_MAX / sizeof(struct odp_flow)) | |
1142 | return -EINVAL; | |
1143 | ||
064af421 BP |
1144 | retval = function(dp, &flowvec); |
1145 | return (retval < 0 ? retval | |
1146 | : retval == flowvec.n_flows ? 0 | |
776f10ce | 1147 | : put_user(retval, &uflowvec->n_flows)); |
064af421 BP |
1148 | } |
1149 | ||
704a1e09 BP |
1150 | static struct sw_flow *do_dump_flow(struct datapath *dp, u32 __user *state) |
1151 | { | |
1152 | struct tbl *table = get_table_protected(dp); | |
1153 | struct tbl_node *tbl_node; | |
1154 | u32 bucket, obj; | |
1155 | ||
1156 | if (get_user(bucket, &state[0]) || get_user(obj, &state[1])) | |
1157 | return ERR_PTR(-EFAULT); | |
1158 | ||
1159 | tbl_node = tbl_next(table, &bucket, &obj); | |
1160 | ||
1161 | if (put_user(bucket, &state[0]) || put_user(obj, &state[1])) | |
1162 | return ERR_PTR(-EFAULT); | |
1163 | ||
1164 | return tbl_node ? flow_cast(tbl_node) : NULL; | |
1165 | } | |
1166 | ||
1167 | static int dump_flow(struct datapath *dp, struct odp_flow_dump __user *udumpp) | |
1168 | { | |
1169 | struct odp_flow __user *uflowp; | |
36956a7d | 1170 | struct nlattr __user *ukey; |
704a1e09 | 1171 | struct sw_flow *flow; |
36956a7d | 1172 | u32 key_len; |
704a1e09 BP |
1173 | |
1174 | flow = do_dump_flow(dp, udumpp->state); | |
1175 | if (IS_ERR(flow)) | |
1176 | return PTR_ERR(flow); | |
1177 | ||
1178 | if (get_user(uflowp, (struct odp_flow __user *__user*)&udumpp->flow)) | |
1179 | return -EFAULT; | |
1180 | ||
1181 | if (!flow) | |
1182 | return put_user(ODPFF_EOF, &uflowp->flags); | |
1183 | ||
36956a7d BP |
1184 | if (put_user(0, &uflowp->flags) || |
1185 | get_user(ukey, (struct nlattr __user * __user*)&uflowp->key) || | |
1186 | get_user(key_len, &uflowp->key_len)) | |
704a1e09 | 1187 | return -EFAULT; |
36956a7d BP |
1188 | |
1189 | key_len = flow_copy_to_user(ukey, &flow->key, key_len); | |
1190 | if (key_len < 0) | |
1191 | return key_len; | |
1192 | if (put_user(key_len, &uflowp->key_len)) | |
1193 | return -EFAULT; | |
1194 | ||
704a1e09 BP |
1195 | return answer_query(dp, flow, 0, uflowp); |
1196 | } | |
1197 | ||
44e05eca | 1198 | static int do_execute(struct datapath *dp, const struct odp_execute *execute) |
064af421 | 1199 | { |
36956a7d | 1200 | struct sw_flow_key key; |
064af421 BP |
1201 | struct sk_buff *skb; |
1202 | struct sw_flow_actions *actions; | |
a393b897 | 1203 | struct ethhdr *eth; |
b7a31ec1 | 1204 | bool is_frag; |
064af421 BP |
1205 | int err; |
1206 | ||
064af421 | 1207 | err = -EINVAL; |
44e05eca | 1208 | if (execute->length < ETH_HLEN || execute->length > 65535) |
064af421 BP |
1209 | goto error; |
1210 | ||
cdee00fd | 1211 | actions = flow_actions_alloc(execute->actions_len); |
8ba1fd2f JG |
1212 | if (IS_ERR(actions)) { |
1213 | err = PTR_ERR(actions); | |
064af421 | 1214 | goto error; |
8ba1fd2f | 1215 | } |
064af421 BP |
1216 | |
1217 | err = -EFAULT; | |
1b29ebe5 | 1218 | if (copy_from_user(actions->actions, |
6c229737 | 1219 | (struct nlattr __user __force *)execute->actions, execute->actions_len)) |
064af421 BP |
1220 | goto error_free_actions; |
1221 | ||
cdee00fd | 1222 | err = validate_actions(actions->actions, execute->actions_len); |
064af421 BP |
1223 | if (err) |
1224 | goto error_free_actions; | |
1225 | ||
1226 | err = -ENOMEM; | |
44e05eca | 1227 | skb = alloc_skb(execute->length, GFP_KERNEL); |
064af421 BP |
1228 | if (!skb) |
1229 | goto error_free_actions; | |
659586ef | 1230 | |
064af421 | 1231 | err = -EFAULT; |
1b29ebe5 | 1232 | if (copy_from_user(skb_put(skb, execute->length), |
6c229737 | 1233 | (const void __user __force *)execute->data, |
44e05eca | 1234 | execute->length)) |
064af421 BP |
1235 | goto error_free_skb; |
1236 | ||
a393b897 JP |
1237 | skb_reset_mac_header(skb); |
1238 | eth = eth_hdr(skb); | |
1239 | ||
de3f65ea JP |
1240 | /* Normally, setting the skb 'protocol' field would be handled by a |
1241 | * call to eth_type_trans(), but it assumes there's a sending | |
1242 | * device, which we may not have. */ | |
a393b897 JP |
1243 | if (ntohs(eth->h_proto) >= 1536) |
1244 | skb->protocol = eth->h_proto; | |
1245 | else | |
1246 | skb->protocol = htons(ETH_P_802_2); | |
1247 | ||
f1588b1f | 1248 | err = flow_extract(skb, -1, &key, &is_frag); |
4c1ad233 BP |
1249 | if (err) |
1250 | goto error_free_skb; | |
9dca7bd5 JG |
1251 | |
1252 | rcu_read_lock(); | |
cdee00fd | 1253 | err = execute_actions(dp, skb, &key, actions->actions, actions->actions_len); |
9dca7bd5 JG |
1254 | rcu_read_unlock(); |
1255 | ||
064af421 BP |
1256 | kfree(actions); |
1257 | return err; | |
1258 | ||
1259 | error_free_skb: | |
1260 | kfree_skb(skb); | |
1261 | error_free_actions: | |
1262 | kfree(actions); | |
1263 | error: | |
1264 | return err; | |
1265 | } | |
1266 | ||
44e05eca BP |
1267 | static int execute_packet(struct datapath *dp, const struct odp_execute __user *executep) |
1268 | { | |
1269 | struct odp_execute execute; | |
1270 | ||
84c17d98 | 1271 | if (copy_from_user(&execute, executep, sizeof(execute))) |
44e05eca BP |
1272 | return -EFAULT; |
1273 | ||
1274 | return do_execute(dp, &execute); | |
1275 | } | |
1276 | ||
16190191 | 1277 | static int get_dp_stats(struct datapath *dp, struct odp_stats __user *statsp) |
064af421 | 1278 | { |
9abaf6b3 | 1279 | struct tbl *table = get_table_protected(dp); |
064af421 BP |
1280 | struct odp_stats stats; |
1281 | int i; | |
1282 | ||
8d5ebd83 JG |
1283 | stats.n_flows = tbl_count(table); |
1284 | stats.cur_capacity = tbl_n_buckets(table); | |
1285 | stats.max_capacity = TBL_MAX_BUCKETS; | |
064af421 BP |
1286 | stats.n_ports = dp->n_ports; |
1287 | stats.max_ports = DP_MAX_PORTS; | |
064af421 BP |
1288 | stats.n_frags = stats.n_hit = stats.n_missed = stats.n_lost = 0; |
1289 | for_each_possible_cpu(i) { | |
38c6ecbc JG |
1290 | const struct dp_stats_percpu *percpu_stats; |
1291 | struct dp_stats_percpu local_stats; | |
1292 | unsigned seqcount; | |
1293 | ||
1294 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
1295 | ||
1296 | do { | |
1297 | seqcount = read_seqcount_begin(&percpu_stats->seqlock); | |
1298 | local_stats = *percpu_stats; | |
1299 | } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount)); | |
1300 | ||
1301 | stats.n_frags += local_stats.n_frags; | |
1302 | stats.n_hit += local_stats.n_hit; | |
1303 | stats.n_missed += local_stats.n_missed; | |
1304 | stats.n_lost += local_stats.n_lost; | |
064af421 BP |
1305 | } |
1306 | stats.max_miss_queue = DP_MAX_QUEUE_LEN; | |
1307 | stats.max_action_queue = DP_MAX_QUEUE_LEN; | |
84c17d98 | 1308 | return copy_to_user(statsp, &stats, sizeof(stats)) ? -EFAULT : 0; |
064af421 BP |
1309 | } |
1310 | ||
1dcf111b JP |
1311 | /* MTU of the dp pseudo-device: ETH_DATA_LEN or the minimum of the ports */ |
1312 | int dp_min_mtu(const struct datapath *dp) | |
1313 | { | |
e779d8d9 | 1314 | struct vport *p; |
1dcf111b JP |
1315 | int mtu = 0; |
1316 | ||
1317 | ASSERT_RTNL(); | |
1318 | ||
1319 | list_for_each_entry_rcu (p, &dp->port_list, node) { | |
f2459fe7 | 1320 | int dev_mtu; |
1dcf111b JP |
1321 | |
1322 | /* Skip any internal ports, since that's what we're trying to | |
1323 | * set. */ | |
e779d8d9 | 1324 | if (is_internal_vport(p)) |
1dcf111b JP |
1325 | continue; |
1326 | ||
e779d8d9 | 1327 | dev_mtu = vport_get_mtu(p); |
f2459fe7 JG |
1328 | if (!mtu || dev_mtu < mtu) |
1329 | mtu = dev_mtu; | |
1dcf111b JP |
1330 | } |
1331 | ||
1332 | return mtu ? mtu : ETH_DATA_LEN; | |
1333 | } | |
1334 | ||
f2459fe7 | 1335 | /* Sets the MTU of all datapath devices to the minimum of the ports. Must |
d8b5d43a | 1336 | * be called with RTNL lock. */ |
f2459fe7 | 1337 | void set_internal_devs_mtu(const struct datapath *dp) |
a7786963 | 1338 | { |
e779d8d9 | 1339 | struct vport *p; |
a7786963 JG |
1340 | int mtu; |
1341 | ||
1342 | ASSERT_RTNL(); | |
1343 | ||
a7786963 JG |
1344 | mtu = dp_min_mtu(dp); |
1345 | ||
1346 | list_for_each_entry_rcu (p, &dp->port_list, node) { | |
e779d8d9 BP |
1347 | if (is_internal_vport(p)) |
1348 | vport_set_mtu(p, mtu); | |
a7786963 JG |
1349 | } |
1350 | } | |
1351 | ||
e779d8d9 | 1352 | static int put_port(const struct vport *p, struct odp_port __user *uop) |
064af421 BP |
1353 | { |
1354 | struct odp_port op; | |
f2459fe7 | 1355 | |
84c17d98 | 1356 | memset(&op, 0, sizeof(op)); |
f2459fe7 JG |
1357 | |
1358 | rcu_read_lock(); | |
84c17d98 BP |
1359 | strncpy(op.devname, vport_get_name(p), sizeof(op.devname)); |
1360 | strncpy(op.type, vport_get_type(p), sizeof(op.type)); | |
dd851cbb | 1361 | vport_get_config(p, op.config); |
f2459fe7 JG |
1362 | rcu_read_unlock(); |
1363 | ||
064af421 | 1364 | op.port = p->port_no; |
f2459fe7 | 1365 | |
84c17d98 | 1366 | return copy_to_user(uop, &op, sizeof(op)) ? -EFAULT : 0; |
064af421 BP |
1367 | } |
1368 | ||
fceb2a5b | 1369 | static int query_port(struct datapath *dp, struct odp_port __user *uport) |
064af421 BP |
1370 | { |
1371 | struct odp_port port; | |
7e71ab66 | 1372 | struct vport *vport; |
064af421 | 1373 | |
84c17d98 | 1374 | if (copy_from_user(&port, uport, sizeof(port))) |
064af421 | 1375 | return -EFAULT; |
f2459fe7 | 1376 | |
064af421 | 1377 | if (port.devname[0]) { |
064af421 BP |
1378 | port.devname[IFNAMSIZ - 1] = '\0'; |
1379 | ||
f2459fe7 | 1380 | vport_lock(); |
f2459fe7 | 1381 | vport = vport_locate(port.devname); |
f2459fe7 JG |
1382 | vport_unlock(); |
1383 | ||
7e71ab66 JG |
1384 | if (!vport) |
1385 | return -ENODEV; | |
1386 | if (vport->dp != dp) | |
1387 | return -ENOENT; | |
064af421 BP |
1388 | } else { |
1389 | if (port.port >= DP_MAX_PORTS) | |
1390 | return -EINVAL; | |
7e71ab66 JG |
1391 | |
1392 | vport = get_vport_protected(dp, port.port); | |
1393 | if (!vport) | |
064af421 | 1394 | return -ENOENT; |
064af421 | 1395 | } |
f2459fe7 | 1396 | |
7e71ab66 | 1397 | return put_port(vport, uport); |
064af421 BP |
1398 | } |
1399 | ||
b0ec0f27 | 1400 | static int do_dump_port(struct datapath *dp, struct odp_vport_dump *dump) |
064af421 | 1401 | { |
b0ec0f27 BP |
1402 | u32 port_no; |
1403 | ||
1404 | for (port_no = dump->port_no; port_no < DP_MAX_PORTS; port_no++) { | |
1405 | struct vport *vport = get_vport_protected(dp, port_no); | |
1406 | if (vport) | |
1407 | return put_port(vport, (struct odp_port __force __user*)dump->port); | |
064af421 | 1408 | } |
b0ec0f27 BP |
1409 | |
1410 | return put_user('\0', (char __force __user*)&dump->port->devname[0]); | |
44e05eca BP |
1411 | } |
1412 | ||
b0ec0f27 | 1413 | static int dump_port(struct datapath *dp, struct odp_vport_dump __user *udump) |
44e05eca | 1414 | { |
b0ec0f27 | 1415 | struct odp_vport_dump dump; |
44e05eca | 1416 | |
b0ec0f27 | 1417 | if (copy_from_user(&dump, udump, sizeof(dump))) |
44e05eca BP |
1418 | return -EFAULT; |
1419 | ||
b0ec0f27 | 1420 | return do_dump_port(dp, &dump); |
064af421 BP |
1421 | } |
1422 | ||
7c40efc9 BP |
1423 | static int get_listen_mask(const struct file *f) |
1424 | { | |
1425 | return (long)f->private_data; | |
1426 | } | |
1427 | ||
1428 | static void set_listen_mask(struct file *f, int listen_mask) | |
1429 | { | |
1430 | f->private_data = (void*)(long)listen_mask; | |
1431 | } | |
1432 | ||
064af421 BP |
1433 | static long openvswitch_ioctl(struct file *f, unsigned int cmd, |
1434 | unsigned long argp) | |
1435 | { | |
1436 | int dp_idx = iminor(f->f_dentry->d_inode); | |
1437 | struct datapath *dp; | |
1438 | int drop_frags, listeners, port_no; | |
72b06300 | 1439 | unsigned int sflow_probability; |
064af421 BP |
1440 | int err; |
1441 | ||
1442 | /* Handle commands with special locking requirements up front. */ | |
1443 | switch (cmd) { | |
1444 | case ODP_DP_CREATE: | |
e86c8696 BP |
1445 | err = create_dp(dp_idx, (char __user *)argp); |
1446 | goto exit; | |
064af421 BP |
1447 | |
1448 | case ODP_DP_DESTROY: | |
e86c8696 BP |
1449 | err = destroy_dp(dp_idx); |
1450 | goto exit; | |
064af421 | 1451 | |
c3827f61 | 1452 | case ODP_VPORT_ATTACH: |
f2459fe7 | 1453 | err = attach_port(dp_idx, (struct odp_port __user *)argp); |
e86c8696 | 1454 | goto exit; |
064af421 | 1455 | |
c3827f61 | 1456 | case ODP_VPORT_DETACH: |
064af421 | 1457 | err = get_user(port_no, (int __user *)argp); |
e86c8696 | 1458 | if (!err) |
f2459fe7 JG |
1459 | err = detach_port(dp_idx, port_no); |
1460 | goto exit; | |
1461 | ||
f2459fe7 | 1462 | case ODP_VPORT_MOD: |
c3827f61 | 1463 | err = vport_user_mod((struct odp_port __user *)argp); |
f2459fe7 JG |
1464 | goto exit; |
1465 | ||
1466 | case ODP_VPORT_STATS_GET: | |
61e89cd6 | 1467 | err = vport_user_stats_get((struct odp_vport_stats_req __user *)argp); |
f2459fe7 JG |
1468 | goto exit; |
1469 | ||
780e6207 JG |
1470 | case ODP_VPORT_STATS_SET: |
1471 | err = vport_user_stats_set((struct odp_vport_stats_req __user *)argp); | |
1472 | goto exit; | |
1473 | ||
f2459fe7 | 1474 | case ODP_VPORT_ETHER_GET: |
61e89cd6 | 1475 | err = vport_user_ether_get((struct odp_vport_ether __user *)argp); |
f2459fe7 JG |
1476 | goto exit; |
1477 | ||
1478 | case ODP_VPORT_ETHER_SET: | |
61e89cd6 | 1479 | err = vport_user_ether_set((struct odp_vport_ether __user *)argp); |
f2459fe7 JG |
1480 | goto exit; |
1481 | ||
1482 | case ODP_VPORT_MTU_GET: | |
61e89cd6 | 1483 | err = vport_user_mtu_get((struct odp_vport_mtu __user *)argp); |
f2459fe7 JG |
1484 | goto exit; |
1485 | ||
1486 | case ODP_VPORT_MTU_SET: | |
61e89cd6 | 1487 | err = vport_user_mtu_set((struct odp_vport_mtu __user *)argp); |
e86c8696 | 1488 | goto exit; |
064af421 BP |
1489 | } |
1490 | ||
1491 | dp = get_dp_locked(dp_idx); | |
e86c8696 | 1492 | err = -ENODEV; |
064af421 | 1493 | if (!dp) |
e86c8696 | 1494 | goto exit; |
064af421 BP |
1495 | |
1496 | switch (cmd) { | |
1497 | case ODP_DP_STATS: | |
1498 | err = get_dp_stats(dp, (struct odp_stats __user *)argp); | |
1499 | break; | |
1500 | ||
1501 | case ODP_GET_DROP_FRAGS: | |
1502 | err = put_user(dp->drop_frags, (int __user *)argp); | |
1503 | break; | |
1504 | ||
1505 | case ODP_SET_DROP_FRAGS: | |
1506 | err = get_user(drop_frags, (int __user *)argp); | |
1507 | if (err) | |
1508 | break; | |
1509 | err = -EINVAL; | |
1510 | if (drop_frags != 0 && drop_frags != 1) | |
1511 | break; | |
1512 | dp->drop_frags = drop_frags; | |
1513 | err = 0; | |
1514 | break; | |
1515 | ||
1516 | case ODP_GET_LISTEN_MASK: | |
7c40efc9 | 1517 | err = put_user(get_listen_mask(f), (int __user *)argp); |
064af421 BP |
1518 | break; |
1519 | ||
1520 | case ODP_SET_LISTEN_MASK: | |
1521 | err = get_user(listeners, (int __user *)argp); | |
1522 | if (err) | |
1523 | break; | |
1524 | err = -EINVAL; | |
1525 | if (listeners & ~ODPL_ALL) | |
1526 | break; | |
1527 | err = 0; | |
7c40efc9 | 1528 | set_listen_mask(f, listeners); |
064af421 BP |
1529 | break; |
1530 | ||
72b06300 BP |
1531 | case ODP_GET_SFLOW_PROBABILITY: |
1532 | err = put_user(dp->sflow_probability, (unsigned int __user *)argp); | |
1533 | break; | |
1534 | ||
1535 | case ODP_SET_SFLOW_PROBABILITY: | |
1536 | err = get_user(sflow_probability, (unsigned int __user *)argp); | |
1537 | if (!err) | |
1538 | dp->sflow_probability = sflow_probability; | |
1539 | break; | |
1540 | ||
c3827f61 | 1541 | case ODP_VPORT_QUERY: |
064af421 BP |
1542 | err = query_port(dp, (struct odp_port __user *)argp); |
1543 | break; | |
1544 | ||
b0ec0f27 BP |
1545 | case ODP_VPORT_DUMP: |
1546 | err = dump_port(dp, (struct odp_vport_dump __user *)argp); | |
064af421 BP |
1547 | break; |
1548 | ||
064af421 BP |
1549 | case ODP_FLOW_FLUSH: |
1550 | err = flush_flows(dp); | |
1551 | break; | |
1552 | ||
1553 | case ODP_FLOW_PUT: | |
1554 | err = put_flow(dp, (struct odp_flow_put __user *)argp); | |
1555 | break; | |
1556 | ||
1557 | case ODP_FLOW_DEL: | |
f1aa2072 | 1558 | err = del_flow(dp, (struct odp_flow __user *)argp); |
064af421 BP |
1559 | break; |
1560 | ||
f1aa2072 | 1561 | case ODP_FLOW_GET: |
44e05eca | 1562 | err = do_flowvec_ioctl(dp, argp, do_query_flows); |
064af421 BP |
1563 | break; |
1564 | ||
704a1e09 BP |
1565 | case ODP_FLOW_DUMP: |
1566 | err = dump_flow(dp, (struct odp_flow_dump __user *)argp); | |
064af421 BP |
1567 | break; |
1568 | ||
1569 | case ODP_EXECUTE: | |
44e05eca | 1570 | err = execute_packet(dp, (struct odp_execute __user *)argp); |
064af421 BP |
1571 | break; |
1572 | ||
1573 | default: | |
1574 | err = -ENOIOCTLCMD; | |
1575 | break; | |
1576 | } | |
1577 | mutex_unlock(&dp->mutex); | |
e86c8696 | 1578 | exit: |
064af421 BP |
1579 | return err; |
1580 | } | |
1581 | ||
1582 | static int dp_has_packet_of_interest(struct datapath *dp, int listeners) | |
1583 | { | |
1584 | int i; | |
1585 | for (i = 0; i < DP_N_QUEUES; i++) { | |
1586 | if (listeners & (1 << i) && !skb_queue_empty(&dp->queues[i])) | |
1587 | return 1; | |
1588 | } | |
1589 | return 0; | |
1590 | } | |
1591 | ||
3fbd517a | 1592 | #ifdef CONFIG_COMPAT |
b0ec0f27 | 1593 | static int compat_dump_port(struct datapath *dp, struct compat_odp_vport_dump __user *compat) |
3fbd517a | 1594 | { |
b0ec0f27 BP |
1595 | struct odp_vport_dump dump; |
1596 | compat_uptr_t port; | |
3fbd517a | 1597 | |
b0ec0f27 BP |
1598 | if (!access_ok(VERIFY_READ, compat, sizeof(struct compat_odp_vport_dump)) || |
1599 | __get_user(port, &compat->port) || | |
1600 | __get_user(dump.port_no, &compat->port_no)) | |
3fbd517a BP |
1601 | return -EFAULT; |
1602 | ||
b0ec0f27 BP |
1603 | dump.port = (struct odp_port __force *)compat_ptr(port); |
1604 | return do_dump_port(dp, &dump); | |
3fbd517a BP |
1605 | } |
1606 | ||
3fbd517a BP |
1607 | static int compat_get_flow(struct odp_flow *flow, const struct compat_odp_flow __user *compat) |
1608 | { | |
36956a7d | 1609 | compat_uptr_t key, actions; |
3fbd517a BP |
1610 | |
1611 | if (!access_ok(VERIFY_READ, compat, sizeof(struct compat_odp_flow)) || | |
1612 | __copy_from_user(&flow->stats, &compat->stats, sizeof(struct odp_flow_stats)) || | |
36956a7d BP |
1613 | __get_user(key, &compat->key) || |
1614 | __get_user(flow->key_len, &compat->key_len) || | |
3fbd517a | 1615 | __get_user(actions, &compat->actions) || |
cdee00fd | 1616 | __get_user(flow->actions_len, &compat->actions_len) || |
3fbd517a BP |
1617 | __get_user(flow->flags, &compat->flags)) |
1618 | return -EFAULT; | |
1619 | ||
36956a7d | 1620 | flow->key = (struct nlattr __force *)compat_ptr(key); |
1b29ebe5 | 1621 | flow->actions = (struct nlattr __force *)compat_ptr(actions); |
3fbd517a BP |
1622 | return 0; |
1623 | } | |
1624 | ||
1625 | static int compat_put_flow(struct datapath *dp, struct compat_odp_flow_put __user *ufp) | |
1626 | { | |
1627 | struct odp_flow_stats stats; | |
1628 | struct odp_flow_put fp; | |
1629 | int error; | |
1630 | ||
1631 | if (compat_get_flow(&fp.flow, &ufp->flow) || | |
1632 | get_user(fp.flags, &ufp->flags)) | |
1633 | return -EFAULT; | |
1634 | ||
1635 | error = do_put_flow(dp, &fp, &stats); | |
1636 | if (error) | |
1637 | return error; | |
1638 | ||
1639 | if (copy_to_user(&ufp->flow.stats, &stats, | |
1640 | sizeof(struct odp_flow_stats))) | |
1641 | return -EFAULT; | |
1642 | ||
1643 | return 0; | |
1644 | } | |
1645 | ||
d3c54451 JG |
1646 | static int compat_answer_query(struct datapath *dp, struct sw_flow *flow, |
1647 | u32 query_flags, | |
3fbd517a BP |
1648 | struct compat_odp_flow __user *ufp) |
1649 | { | |
1650 | compat_uptr_t actions; | |
1651 | ||
1652 | if (get_user(actions, &ufp->actions)) | |
1653 | return -EFAULT; | |
1654 | ||
d3c54451 | 1655 | return do_answer_query(dp, flow, query_flags, &ufp->stats, |
cdee00fd | 1656 | compat_ptr(actions), &ufp->actions_len); |
3fbd517a BP |
1657 | } |
1658 | ||
1659 | static int compat_del_flow(struct datapath *dp, struct compat_odp_flow __user *ufp) | |
1660 | { | |
1661 | struct sw_flow *flow; | |
1662 | struct odp_flow uf; | |
1663 | int error; | |
1664 | ||
1665 | if (compat_get_flow(&uf, ufp)) | |
1666 | return -EFAULT; | |
1667 | ||
36956a7d | 1668 | flow = do_del_flow(dp, (const struct nlattr __force __user *)uf.key, uf.key_len); |
3fbd517a BP |
1669 | if (IS_ERR(flow)) |
1670 | return PTR_ERR(flow); | |
1671 | ||
d3c54451 | 1672 | error = compat_answer_query(dp, flow, 0, ufp); |
3fbd517a BP |
1673 | flow_deferred_free(flow); |
1674 | return error; | |
1675 | } | |
1676 | ||
1b29ebe5 JG |
1677 | static int compat_query_flows(struct datapath *dp, |
1678 | struct compat_odp_flow __user *flows, | |
1679 | u32 n_flows) | |
3fbd517a | 1680 | { |
9abaf6b3 | 1681 | struct tbl *table = get_table_protected(dp); |
3fbd517a BP |
1682 | u32 i; |
1683 | ||
1684 | for (i = 0; i < n_flows; i++) { | |
1685 | struct compat_odp_flow __user *ufp = &flows[i]; | |
1686 | struct odp_flow uf; | |
1687 | struct tbl_node *flow_node; | |
36956a7d | 1688 | struct sw_flow_key key; |
3fbd517a BP |
1689 | int error; |
1690 | ||
1691 | if (compat_get_flow(&uf, ufp)) | |
1692 | return -EFAULT; | |
3fbd517a | 1693 | |
36956a7d BP |
1694 | error = flow_copy_from_user(&key, (const struct nlattr __force __user *) uf.key, uf.key_len); |
1695 | if (error) | |
1696 | return error; | |
1697 | ||
1698 | flow_node = tbl_lookup(table, &key, flow_hash(&key), flow_cmp); | |
3fbd517a BP |
1699 | if (!flow_node) |
1700 | error = put_user(ENOENT, &ufp->stats.error); | |
1701 | else | |
d3c54451 JG |
1702 | error = compat_answer_query(dp, flow_cast(flow_node), |
1703 | uf.flags, ufp); | |
3fbd517a BP |
1704 | if (error) |
1705 | return -EFAULT; | |
1706 | } | |
1707 | return n_flows; | |
1708 | } | |
1709 | ||
704a1e09 | 1710 | static int compat_dump_flow(struct datapath *dp, struct compat_odp_flow_dump __user *udumpp) |
3fbd517a | 1711 | { |
704a1e09 BP |
1712 | struct compat_odp_flow __user *uflowp; |
1713 | compat_uptr_t compat_ufp; | |
1714 | struct sw_flow *flow; | |
36956a7d BP |
1715 | compat_uptr_t ukey; |
1716 | u32 key_len; | |
3fbd517a | 1717 | |
704a1e09 BP |
1718 | flow = do_dump_flow(dp, udumpp->state); |
1719 | if (IS_ERR(flow)) | |
1720 | return PTR_ERR(flow); | |
3fbd517a | 1721 | |
704a1e09 BP |
1722 | if (get_user(compat_ufp, &udumpp->flow)) |
1723 | return -EFAULT; | |
1724 | uflowp = compat_ptr(compat_ufp); | |
3fbd517a | 1725 | |
704a1e09 BP |
1726 | if (!flow) |
1727 | return put_user(ODPFF_EOF, &uflowp->flags); | |
6bfafa55 | 1728 | |
36956a7d BP |
1729 | if (put_user(0, &uflowp->flags) || |
1730 | get_user(ukey, &uflowp->key) || | |
1731 | get_user(key_len, &uflowp->key_len)) | |
1732 | return -EFAULT; | |
1733 | ||
1734 | key_len = flow_copy_to_user(compat_ptr(ukey), &flow->key, key_len); | |
1735 | if (key_len < 0) | |
1736 | return key_len; | |
1737 | if (put_user(key_len, &uflowp->key_len)) | |
704a1e09 | 1738 | return -EFAULT; |
36956a7d | 1739 | |
704a1e09 | 1740 | return compat_answer_query(dp, flow, 0, uflowp); |
3fbd517a BP |
1741 | } |
1742 | ||
1743 | static int compat_flowvec_ioctl(struct datapath *dp, unsigned long argp, | |
1744 | int (*function)(struct datapath *, | |
1b29ebe5 | 1745 | struct compat_odp_flow __user *, |
3fbd517a BP |
1746 | u32 n_flows)) |
1747 | { | |
1748 | struct compat_odp_flowvec __user *uflowvec; | |
1749 | struct compat_odp_flow __user *flows; | |
1750 | struct compat_odp_flowvec flowvec; | |
1751 | int retval; | |
1752 | ||
1753 | uflowvec = compat_ptr(argp); | |
84c17d98 BP |
1754 | if (!access_ok(VERIFY_WRITE, uflowvec, sizeof(*uflowvec)) || |
1755 | copy_from_user(&flowvec, uflowvec, sizeof(flowvec))) | |
3fbd517a BP |
1756 | return -EFAULT; |
1757 | ||
1758 | if (flowvec.n_flows > INT_MAX / sizeof(struct compat_odp_flow)) | |
1759 | return -EINVAL; | |
1760 | ||
1761 | flows = compat_ptr(flowvec.flows); | |
1762 | if (!access_ok(VERIFY_WRITE, flows, | |
1763 | flowvec.n_flows * sizeof(struct compat_odp_flow))) | |
1764 | return -EFAULT; | |
1765 | ||
1766 | retval = function(dp, flows, flowvec.n_flows); | |
1767 | return (retval < 0 ? retval | |
1768 | : retval == flowvec.n_flows ? 0 | |
1769 | : put_user(retval, &uflowvec->n_flows)); | |
1770 | } | |
1771 | ||
1772 | static int compat_execute(struct datapath *dp, const struct compat_odp_execute __user *uexecute) | |
1773 | { | |
1774 | struct odp_execute execute; | |
1775 | compat_uptr_t actions; | |
1776 | compat_uptr_t data; | |
1777 | ||
1778 | if (!access_ok(VERIFY_READ, uexecute, sizeof(struct compat_odp_execute)) || | |
3fbd517a | 1779 | __get_user(actions, &uexecute->actions) || |
cdee00fd | 1780 | __get_user(execute.actions_len, &uexecute->actions_len) || |
3fbd517a BP |
1781 | __get_user(data, &uexecute->data) || |
1782 | __get_user(execute.length, &uexecute->length)) | |
1783 | return -EFAULT; | |
1784 | ||
1b29ebe5 JG |
1785 | execute.actions = (struct nlattr __force *)compat_ptr(actions); |
1786 | execute.data = (const void __force *)compat_ptr(data); | |
3fbd517a BP |
1787 | |
1788 | return do_execute(dp, &execute); | |
1789 | } | |
1790 | ||
1791 | static long openvswitch_compat_ioctl(struct file *f, unsigned int cmd, unsigned long argp) | |
1792 | { | |
1793 | int dp_idx = iminor(f->f_dentry->d_inode); | |
1794 | struct datapath *dp; | |
1795 | int err; | |
1796 | ||
1797 | switch (cmd) { | |
1798 | case ODP_DP_DESTROY: | |
1799 | case ODP_FLOW_FLUSH: | |
1800 | /* Ioctls that don't need any translation at all. */ | |
1801 | return openvswitch_ioctl(f, cmd, argp); | |
1802 | ||
1803 | case ODP_DP_CREATE: | |
c3827f61 BP |
1804 | case ODP_VPORT_ATTACH: |
1805 | case ODP_VPORT_DETACH: | |
1806 | case ODP_VPORT_MOD: | |
3fbd517a BP |
1807 | case ODP_VPORT_MTU_SET: |
1808 | case ODP_VPORT_MTU_GET: | |
1809 | case ODP_VPORT_ETHER_SET: | |
1810 | case ODP_VPORT_ETHER_GET: | |
780e6207 | 1811 | case ODP_VPORT_STATS_SET: |
3fbd517a BP |
1812 | case ODP_VPORT_STATS_GET: |
1813 | case ODP_DP_STATS: | |
1814 | case ODP_GET_DROP_FRAGS: | |
1815 | case ODP_SET_DROP_FRAGS: | |
1816 | case ODP_SET_LISTEN_MASK: | |
1817 | case ODP_GET_LISTEN_MASK: | |
1818 | case ODP_SET_SFLOW_PROBABILITY: | |
1819 | case ODP_GET_SFLOW_PROBABILITY: | |
c3827f61 | 1820 | case ODP_VPORT_QUERY: |
3fbd517a BP |
1821 | /* Ioctls that just need their pointer argument extended. */ |
1822 | return openvswitch_ioctl(f, cmd, (unsigned long)compat_ptr(argp)); | |
3fbd517a BP |
1823 | } |
1824 | ||
1825 | dp = get_dp_locked(dp_idx); | |
1826 | err = -ENODEV; | |
1827 | if (!dp) | |
1828 | goto exit; | |
1829 | ||
1830 | switch (cmd) { | |
b0ec0f27 BP |
1831 | case ODP_VPORT_DUMP32: |
1832 | err = compat_dump_port(dp, compat_ptr(argp)); | |
3fbd517a BP |
1833 | break; |
1834 | ||
3fbd517a BP |
1835 | case ODP_FLOW_PUT32: |
1836 | err = compat_put_flow(dp, compat_ptr(argp)); | |
1837 | break; | |
1838 | ||
1839 | case ODP_FLOW_DEL32: | |
1840 | err = compat_del_flow(dp, compat_ptr(argp)); | |
1841 | break; | |
1842 | ||
1843 | case ODP_FLOW_GET32: | |
1844 | err = compat_flowvec_ioctl(dp, argp, compat_query_flows); | |
1845 | break; | |
1846 | ||
704a1e09 BP |
1847 | case ODP_FLOW_DUMP32: |
1848 | err = compat_dump_flow(dp, compat_ptr(argp)); | |
3fbd517a BP |
1849 | break; |
1850 | ||
1851 | case ODP_EXECUTE32: | |
1852 | err = compat_execute(dp, compat_ptr(argp)); | |
1853 | break; | |
1854 | ||
1855 | default: | |
1856 | err = -ENOIOCTLCMD; | |
1857 | break; | |
1858 | } | |
1859 | mutex_unlock(&dp->mutex); | |
1860 | exit: | |
1861 | return err; | |
1862 | } | |
1863 | #endif | |
1864 | ||
33b38b63 JG |
1865 | static ssize_t openvswitch_read(struct file *f, char __user *buf, |
1866 | size_t nbytes, loff_t *ppos) | |
064af421 | 1867 | { |
7c40efc9 | 1868 | int listeners = get_listen_mask(f); |
064af421 | 1869 | int dp_idx = iminor(f->f_dentry->d_inode); |
e22d4953 | 1870 | struct datapath *dp = get_dp_locked(dp_idx); |
064af421 | 1871 | struct sk_buff *skb; |
856081f6 | 1872 | struct iovec iov; |
064af421 BP |
1873 | int retval; |
1874 | ||
1875 | if (!dp) | |
1876 | return -ENODEV; | |
1877 | ||
1878 | if (nbytes == 0 || !listeners) | |
1879 | return 0; | |
1880 | ||
1881 | for (;;) { | |
1882 | int i; | |
1883 | ||
1884 | for (i = 0; i < DP_N_QUEUES; i++) { | |
1885 | if (listeners & (1 << i)) { | |
1886 | skb = skb_dequeue(&dp->queues[i]); | |
1887 | if (skb) | |
1888 | goto success; | |
1889 | } | |
1890 | } | |
1891 | ||
1892 | if (f->f_flags & O_NONBLOCK) { | |
1893 | retval = -EAGAIN; | |
1894 | goto error; | |
1895 | } | |
1896 | ||
1897 | wait_event_interruptible(dp->waitqueue, | |
1898 | dp_has_packet_of_interest(dp, | |
1899 | listeners)); | |
1900 | ||
1901 | if (signal_pending(current)) { | |
1902 | retval = -ERESTARTSYS; | |
1903 | goto error; | |
1904 | } | |
1905 | } | |
1906 | success: | |
e22d4953 JG |
1907 | mutex_unlock(&dp->mutex); |
1908 | ||
856081f6 BP |
1909 | iov.iov_base = buf; |
1910 | iov.iov_len = min_t(size_t, skb->len, nbytes); | |
1911 | retval = skb_copy_datagram_iovec(skb, 0, &iov, iov.iov_len); | |
064af421 | 1912 | if (!retval) |
856081f6 | 1913 | retval = skb->len; |
9cc8b4e4 | 1914 | |
064af421 | 1915 | kfree_skb(skb); |
e22d4953 | 1916 | return retval; |
064af421 BP |
1917 | |
1918 | error: | |
e22d4953 | 1919 | mutex_unlock(&dp->mutex); |
064af421 BP |
1920 | return retval; |
1921 | } | |
1922 | ||
1923 | static unsigned int openvswitch_poll(struct file *file, poll_table *wait) | |
1924 | { | |
1925 | int dp_idx = iminor(file->f_dentry->d_inode); | |
e22d4953 | 1926 | struct datapath *dp = get_dp_locked(dp_idx); |
064af421 BP |
1927 | unsigned int mask; |
1928 | ||
1929 | if (dp) { | |
1930 | mask = 0; | |
1931 | poll_wait(file, &dp->waitqueue, wait); | |
7c40efc9 | 1932 | if (dp_has_packet_of_interest(dp, get_listen_mask(file))) |
064af421 | 1933 | mask |= POLLIN | POLLRDNORM; |
e22d4953 | 1934 | mutex_unlock(&dp->mutex); |
064af421 BP |
1935 | } else { |
1936 | mask = POLLIN | POLLRDNORM | POLLHUP; | |
1937 | } | |
1938 | return mask; | |
1939 | } | |
1940 | ||
33b38b63 | 1941 | static struct file_operations openvswitch_fops = { |
609af740 | 1942 | .owner = THIS_MODULE, |
064af421 BP |
1943 | .read = openvswitch_read, |
1944 | .poll = openvswitch_poll, | |
1945 | .unlocked_ioctl = openvswitch_ioctl, | |
3fbd517a BP |
1946 | #ifdef CONFIG_COMPAT |
1947 | .compat_ioctl = openvswitch_compat_ioctl, | |
1948 | #endif | |
064af421 BP |
1949 | }; |
1950 | ||
1951 | static int major; | |
22d24ebf | 1952 | |
22d24ebf BP |
1953 | static int __init dp_init(void) |
1954 | { | |
f2459fe7 | 1955 | struct sk_buff *dummy_skb; |
22d24ebf BP |
1956 | int err; |
1957 | ||
f2459fe7 | 1958 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb)); |
22d24ebf | 1959 | |
f2459fe7 | 1960 | printk("Open vSwitch %s, built "__DATE__" "__TIME__"\n", VERSION BUILDNR); |
064af421 BP |
1961 | |
1962 | err = flow_init(); | |
1963 | if (err) | |
1964 | goto error; | |
1965 | ||
f2459fe7 | 1966 | err = vport_init(); |
064af421 BP |
1967 | if (err) |
1968 | goto error_flow_exit; | |
1969 | ||
f2459fe7 JG |
1970 | err = register_netdevice_notifier(&dp_device_notifier); |
1971 | if (err) | |
1972 | goto error_vport_exit; | |
1973 | ||
064af421 BP |
1974 | major = register_chrdev(0, "openvswitch", &openvswitch_fops); |
1975 | if (err < 0) | |
1976 | goto error_unreg_notifier; | |
1977 | ||
064af421 BP |
1978 | return 0; |
1979 | ||
1980 | error_unreg_notifier: | |
1981 | unregister_netdevice_notifier(&dp_device_notifier); | |
f2459fe7 JG |
1982 | error_vport_exit: |
1983 | vport_exit(); | |
064af421 BP |
1984 | error_flow_exit: |
1985 | flow_exit(); | |
1986 | error: | |
1987 | return err; | |
1988 | } | |
1989 | ||
1990 | static void dp_cleanup(void) | |
1991 | { | |
1992 | rcu_barrier(); | |
1993 | unregister_chrdev(major, "openvswitch"); | |
1994 | unregister_netdevice_notifier(&dp_device_notifier); | |
f2459fe7 | 1995 | vport_exit(); |
064af421 | 1996 | flow_exit(); |
064af421 BP |
1997 | } |
1998 | ||
1999 | module_init(dp_init); | |
2000 | module_exit(dp_cleanup); | |
2001 | ||
2002 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2003 | MODULE_LICENSE("GPL"); |