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Commit | Line | Data |
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064af421 | 1 | /* |
a9a29d22 | 2 | * Copyright (c) 2007-2011 Nicira Networks. |
a14bc59f | 3 | * |
a9a29d22 JG |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
064af421 BP |
17 | */ |
18 | ||
dfffaef1 JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
064af421 BP |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> | |
064af421 | 23 | #include <linux/if_arp.h> |
064af421 BP |
24 | #include <linux/if_vlan.h> |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
982b8810 | 27 | #include <linux/jhash.h> |
064af421 BP |
28 | #include <linux/delay.h> |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
ed099e92 | 31 | #include <linux/genetlink.h> |
064af421 BP |
32 | #include <linux/kernel.h> |
33 | #include <linux/kthread.h> | |
064af421 BP |
34 | #include <linux/mutex.h> |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
39 | #include <linux/version.h> | |
40 | #include <linux/ethtool.h> | |
064af421 BP |
41 | #include <linux/wait.h> |
42 | #include <asm/system.h> | |
43 | #include <asm/div64.h> | |
656a0e37 | 44 | #include <linux/highmem.h> |
064af421 BP |
45 | #include <linux/netfilter_bridge.h> |
46 | #include <linux/netfilter_ipv4.h> | |
47 | #include <linux/inetdevice.h> | |
48 | #include <linux/list.h> | |
077257b8 | 49 | #include <linux/openvswitch.h> |
064af421 | 50 | #include <linux/rculist.h> |
064af421 | 51 | #include <linux/dmi.h> |
36956a7d | 52 | #include <net/genetlink.h> |
064af421 | 53 | |
dd8d6b8c | 54 | #include "checksum.h" |
064af421 | 55 | #include "datapath.h" |
064af421 | 56 | #include "flow.h" |
303708cc | 57 | #include "vlan.h" |
3544358a | 58 | #include "tunnel.h" |
f2459fe7 | 59 | #include "vport-internal_dev.h" |
064af421 | 60 | |
4cf41591 | 61 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) || \ |
143af30e PS |
62 | LINUX_VERSION_CODE > KERNEL_VERSION(3,2,0) |
63 | #error Kernels before 2.6.18 or after 3.2 are not supported by this version of Open vSwitch. | |
4cf41591 JG |
64 | #endif |
65 | ||
064af421 BP |
66 | int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd); |
67 | EXPORT_SYMBOL(dp_ioctl_hook); | |
68 | ||
ed099e92 BP |
69 | /** |
70 | * DOC: Locking: | |
064af421 | 71 | * |
ed099e92 BP |
72 | * Writes to device state (add/remove datapath, port, set operations on vports, |
73 | * etc.) are protected by RTNL. | |
064af421 | 74 | * |
ed099e92 | 75 | * Writes to other state (flow table modifications, set miscellaneous datapath |
7257b535 BP |
76 | * parameters, etc.) are protected by genl_mutex. The RTNL lock nests inside |
77 | * genl_mutex. | |
ed099e92 BP |
78 | * |
79 | * Reads are protected by RCU. | |
80 | * | |
81 | * There are a few special cases (mostly stats) that have their own | |
82 | * synchronization but they nest under all of above and don't interact with | |
83 | * each other. | |
064af421 | 84 | */ |
ed099e92 | 85 | |
254f2dc8 BP |
86 | /* Global list of datapaths to enable dumping them all out. |
87 | * Protected by genl_mutex. | |
88 | */ | |
89 | static LIST_HEAD(dps); | |
064af421 | 90 | |
c19e6535 | 91 | static struct vport *new_vport(const struct vport_parms *); |
7257b535 BP |
92 | static int queue_gso_packets(int dp_ifindex, struct sk_buff *, |
93 | const struct dp_upcall_info *); | |
94 | static int queue_userspace_packet(int dp_ifindex, struct sk_buff *, | |
95 | const struct dp_upcall_info *); | |
064af421 | 96 | |
ed099e92 | 97 | /* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */ |
df2a06ab | 98 | static struct datapath *get_dp(int dp_ifindex) |
064af421 | 99 | { |
254f2dc8 BP |
100 | struct datapath *dp = NULL; |
101 | struct net_device *dev; | |
ed099e92 | 102 | |
254f2dc8 BP |
103 | rcu_read_lock(); |
104 | dev = dev_get_by_index_rcu(&init_net, dp_ifindex); | |
105 | if (dev) { | |
106 | struct vport *vport = internal_dev_get_vport(dev); | |
107 | if (vport) | |
108 | dp = vport->dp; | |
109 | } | |
110 | rcu_read_unlock(); | |
111 | ||
112 | return dp; | |
064af421 | 113 | } |
064af421 | 114 | |
ed099e92 | 115 | /* Must be called with genl_mutex. */ |
3544358a | 116 | static struct flow_table *get_table_protected(struct datapath *dp) |
9abaf6b3 | 117 | { |
ed099e92 | 118 | return rcu_dereference_protected(dp->table, lockdep_genl_is_held()); |
1452b28c JG |
119 | } |
120 | ||
ed099e92 | 121 | /* Must be called with rcu_read_lock or RTNL lock. */ |
027f9007 | 122 | static struct vport *get_vport_protected(struct datapath *dp, u16 port_no) |
1452b28c | 123 | { |
ed099e92 | 124 | return rcu_dereference_rtnl(dp->ports[port_no]); |
9abaf6b3 JG |
125 | } |
126 | ||
f2459fe7 JG |
127 | /* Must be called with rcu_read_lock or RTNL lock. */ |
128 | const char *dp_name(const struct datapath *dp) | |
129 | { | |
16b82e84 JG |
130 | struct vport *vport = rcu_dereference_rtnl(dp->ports[OVSP_LOCAL]); |
131 | return vport->ops->get_name(vport); | |
f2459fe7 JG |
132 | } |
133 | ||
99769a40 JG |
134 | static int get_dpifindex(struct datapath *dp) |
135 | { | |
136 | struct vport *local; | |
137 | int ifindex; | |
138 | ||
139 | rcu_read_lock(); | |
140 | ||
141 | local = get_vport_protected(dp, OVSP_LOCAL); | |
142 | if (local) | |
16b82e84 | 143 | ifindex = local->ops->get_ifindex(local); |
99769a40 JG |
144 | else |
145 | ifindex = 0; | |
146 | ||
147 | rcu_read_unlock(); | |
148 | ||
149 | return ifindex; | |
150 | } | |
151 | ||
6455100f | 152 | static size_t br_nlmsg_size(void) |
064af421 BP |
153 | { |
154 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
155 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
156 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
157 | + nla_total_size(4) /* IFLA_MASTER */ | |
158 | + nla_total_size(4) /* IFLA_MTU */ | |
064af421 BP |
159 | + nla_total_size(1); /* IFLA_OPERSTATE */ |
160 | } | |
161 | ||
ed099e92 | 162 | /* Caller must hold RTNL lock. */ |
064af421 | 163 | static int dp_fill_ifinfo(struct sk_buff *skb, |
e779d8d9 | 164 | const struct vport *port, |
064af421 BP |
165 | int event, unsigned int flags) |
166 | { | |
027f9007 | 167 | struct datapath *dp = port->dp; |
064af421 BP |
168 | struct ifinfomsg *hdr; |
169 | struct nlmsghdr *nlh; | |
170 | ||
16b82e84 JG |
171 | if (!port->ops->get_ifindex) |
172 | return -ENODEV; | |
f2459fe7 | 173 | |
064af421 BP |
174 | nlh = nlmsg_put(skb, 0, 0, event, sizeof(*hdr), flags); |
175 | if (nlh == NULL) | |
176 | return -EMSGSIZE; | |
177 | ||
178 | hdr = nlmsg_data(nlh); | |
179 | hdr->ifi_family = AF_BRIDGE; | |
180 | hdr->__ifi_pad = 0; | |
f2459fe7 | 181 | hdr->ifi_type = ARPHRD_ETHER; |
16b82e84 JG |
182 | hdr->ifi_index = port->ops->get_ifindex(port); |
183 | hdr->ifi_flags = port->ops->get_dev_flags(port); | |
064af421 BP |
184 | hdr->ifi_change = 0; |
185 | ||
16b82e84 | 186 | NLA_PUT_STRING(skb, IFLA_IFNAME, port->ops->get_name(port)); |
99769a40 | 187 | NLA_PUT_U32(skb, IFLA_MASTER, get_dpifindex(dp)); |
16b82e84 | 188 | NLA_PUT_U32(skb, IFLA_MTU, port->ops->get_mtu(port)); |
064af421 BP |
189 | #ifdef IFLA_OPERSTATE |
190 | NLA_PUT_U8(skb, IFLA_OPERSTATE, | |
16b82e84 JG |
191 | port->ops->is_running(port) |
192 | ? port->ops->get_operstate(port) | |
f2459fe7 | 193 | : IF_OPER_DOWN); |
064af421 BP |
194 | #endif |
195 | ||
16b82e84 | 196 | NLA_PUT(skb, IFLA_ADDRESS, ETH_ALEN, port->ops->get_addr(port)); |
064af421 | 197 | |
064af421 BP |
198 | return nlmsg_end(skb, nlh); |
199 | ||
200 | nla_put_failure: | |
201 | nlmsg_cancel(skb, nlh); | |
202 | return -EMSGSIZE; | |
203 | } | |
204 | ||
ed099e92 | 205 | /* Caller must hold RTNL lock. */ |
e779d8d9 | 206 | static void dp_ifinfo_notify(int event, struct vport *port) |
064af421 | 207 | { |
064af421 | 208 | struct sk_buff *skb; |
16b82e84 | 209 | int err; |
064af421 BP |
210 | |
211 | skb = nlmsg_new(br_nlmsg_size(), GFP_KERNEL); | |
16b82e84 JG |
212 | if (!skb) { |
213 | err = -ENOBUFS; | |
214 | goto err; | |
215 | } | |
064af421 BP |
216 | |
217 | err = dp_fill_ifinfo(skb, port, event, 0); | |
218 | if (err < 0) { | |
16b82e84 JG |
219 | if (err == -ENODEV) { |
220 | goto out; | |
221 | } else { | |
222 | /* -EMSGSIZE implies BUG in br_nlmsg_size() */ | |
223 | WARN_ON(err == -EMSGSIZE); | |
224 | goto err; | |
225 | } | |
064af421 | 226 | } |
16b82e84 | 227 | |
f2459fe7 | 228 | rtnl_notify(skb, &init_net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); |
16b82e84 | 229 | |
cfe7c1f5 | 230 | return; |
16b82e84 JG |
231 | err: |
232 | rtnl_set_sk_err(&init_net, RTNLGRP_LINK, err); | |
233 | out: | |
234 | kfree_skb(skb); | |
064af421 BP |
235 | } |
236 | ||
58c342f6 BP |
237 | static void release_dp(struct kobject *kobj) |
238 | { | |
239 | struct datapath *dp = container_of(kobj, struct datapath, ifobj); | |
240 | kfree(dp); | |
241 | } | |
242 | ||
35f7605b | 243 | static struct kobj_type dp_ktype = { |
58c342f6 BP |
244 | .release = release_dp |
245 | }; | |
246 | ||
46c6a11d JG |
247 | static void destroy_dp_rcu(struct rcu_head *rcu) |
248 | { | |
249 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 250 | |
be2ba156 | 251 | flow_tbl_destroy((__force struct flow_table *)dp->table); |
46c6a11d JG |
252 | free_percpu(dp->stats_percpu); |
253 | kobject_put(&dp->ifobj); | |
254 | } | |
255 | ||
ed099e92 | 256 | /* Called with RTNL lock and genl_lock. */ |
c19e6535 | 257 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 258 | { |
f2459fe7 | 259 | struct vport *vport; |
f2459fe7 | 260 | |
c19e6535 BP |
261 | vport = vport_add(parms); |
262 | if (!IS_ERR(vport)) { | |
263 | struct datapath *dp = parms->dp; | |
064af421 | 264 | |
c19e6535 | 265 | rcu_assign_pointer(dp->ports[parms->port_no], vport); |
ed099e92 | 266 | list_add(&vport->node, &dp->port_list); |
064af421 | 267 | |
c19e6535 BP |
268 | dp_ifinfo_notify(RTM_NEWLINK, vport); |
269 | } | |
064af421 | 270 | |
c19e6535 | 271 | return vport; |
064af421 BP |
272 | } |
273 | ||
ed099e92 | 274 | /* Called with RTNL lock. */ |
3544358a | 275 | void dp_detach_port(struct vport *p) |
064af421 BP |
276 | { |
277 | ASSERT_RTNL(); | |
278 | ||
df2c07f4 | 279 | if (p->port_no != OVSP_LOCAL) |
0515ceb3 | 280 | dp_sysfs_del_if(p); |
064af421 BP |
281 | dp_ifinfo_notify(RTM_DELLINK, p); |
282 | ||
064af421 | 283 | /* First drop references to device. */ |
ed099e92 | 284 | list_del(&p->node); |
064af421 | 285 | rcu_assign_pointer(p->dp->ports[p->port_no], NULL); |
f2459fe7 | 286 | |
7237e4f4 | 287 | /* Then destroy it. */ |
3544358a | 288 | vport_del(p); |
064af421 BP |
289 | } |
290 | ||
8819fac7 | 291 | /* Must be called with rcu_read_lock. */ |
e779d8d9 | 292 | void dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
293 | { |
294 | struct datapath *dp = p->dp; | |
3544358a | 295 | struct sw_flow *flow; |
064af421 | 296 | struct dp_stats_percpu *stats; |
e9141eec | 297 | u64 *stats_counter; |
4c1ad233 | 298 | int error; |
064af421 | 299 | |
e9141eec | 300 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); |
a063b0df | 301 | |
3976f6d5 | 302 | if (!OVS_CB(skb)->flow) { |
36956a7d | 303 | struct sw_flow_key key; |
76abe283 | 304 | int key_len; |
4c1ad233 | 305 | |
3976f6d5 | 306 | /* Extract flow from 'skb' into 'key'. */ |
7257b535 | 307 | error = flow_extract(skb, p->port_no, &key, &key_len); |
3976f6d5 JG |
308 | if (unlikely(error)) { |
309 | kfree_skb(skb); | |
310 | return; | |
311 | } | |
064af421 | 312 | |
3976f6d5 | 313 | /* Look up flow. */ |
6455100f PS |
314 | flow = flow_tbl_lookup(rcu_dereference(dp->table), |
315 | &key, key_len); | |
3544358a | 316 | if (unlikely(!flow)) { |
856081f6 BP |
317 | struct dp_upcall_info upcall; |
318 | ||
df2c07f4 | 319 | upcall.cmd = OVS_PACKET_CMD_MISS; |
856081f6 | 320 | upcall.key = &key; |
98403001 BP |
321 | upcall.userdata = NULL; |
322 | upcall.pid = p->upcall_pid; | |
856081f6 | 323 | dp_upcall(dp, skb, &upcall); |
d9e214da | 324 | consume_skb(skb); |
e9141eec | 325 | stats_counter = &stats->n_missed; |
3976f6d5 JG |
326 | goto out; |
327 | } | |
328 | ||
3544358a | 329 | OVS_CB(skb)->flow = flow; |
55574bb0 BP |
330 | } |
331 | ||
e9141eec | 332 | stats_counter = &stats->n_hit; |
3976f6d5 | 333 | flow_used(OVS_CB(skb)->flow, skb); |
a4af2475 | 334 | execute_actions(dp, skb); |
55574bb0 | 335 | |
8819fac7 | 336 | out: |
55574bb0 | 337 | /* Update datapath statistics. */ |
38c6ecbc JG |
338 | |
339 | write_seqcount_begin(&stats->seqlock); | |
e9141eec | 340 | (*stats_counter)++; |
38c6ecbc | 341 | write_seqcount_end(&stats->seqlock); |
064af421 BP |
342 | } |
343 | ||
aa5a8fdc JG |
344 | static struct genl_family dp_packet_genl_family = { |
345 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
346 | .hdrsize = sizeof(struct ovs_header), |
347 | .name = OVS_PACKET_FAMILY, | |
69685a88 | 348 | .version = OVS_PACKET_VERSION, |
df2c07f4 | 349 | .maxattr = OVS_PACKET_ATTR_MAX |
aa5a8fdc JG |
350 | }; |
351 | ||
36ce148c PS |
352 | int dp_upcall(struct datapath *dp, struct sk_buff *skb, |
353 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc JG |
354 | { |
355 | struct dp_stats_percpu *stats; | |
7257b535 | 356 | int dp_ifindex; |
aa5a8fdc JG |
357 | int err; |
358 | ||
98403001 | 359 | if (upcall_info->pid == 0) { |
b063d9f0 | 360 | err = -ENOTCONN; |
b063d9f0 JG |
361 | goto err; |
362 | } | |
363 | ||
7257b535 BP |
364 | dp_ifindex = get_dpifindex(dp); |
365 | if (!dp_ifindex) { | |
366 | err = -ENODEV; | |
367 | goto err; | |
aa5a8fdc JG |
368 | } |
369 | ||
7257b535 | 370 | forward_ip_summed(skb, true); |
36ce148c | 371 | |
7257b535 BP |
372 | if (!skb_is_gso(skb)) |
373 | err = queue_userspace_packet(dp_ifindex, skb, upcall_info); | |
374 | else | |
375 | err = queue_gso_packets(dp_ifindex, skb, upcall_info); | |
d76195db JG |
376 | if (err) |
377 | goto err; | |
378 | ||
379 | return 0; | |
aa5a8fdc | 380 | |
aa5a8fdc | 381 | err: |
aa5a8fdc JG |
382 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); |
383 | ||
384 | write_seqcount_begin(&stats->seqlock); | |
385 | stats->n_lost++; | |
386 | write_seqcount_end(&stats->seqlock); | |
387 | ||
aa5a8fdc | 388 | return err; |
982b8810 BP |
389 | } |
390 | ||
7257b535 BP |
391 | static int queue_gso_packets(int dp_ifindex, struct sk_buff *skb, |
392 | const struct dp_upcall_info *upcall_info) | |
cb5087ca | 393 | { |
7257b535 BP |
394 | struct dp_upcall_info later_info; |
395 | struct sw_flow_key later_key; | |
396 | struct sk_buff *segs, *nskb; | |
397 | int err; | |
cb5087ca | 398 | |
7257b535 BP |
399 | segs = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM); |
400 | if (IS_ERR(skb)) | |
401 | return PTR_ERR(skb); | |
99769a40 | 402 | |
7257b535 BP |
403 | /* Queue all of the segments. */ |
404 | skb = segs; | |
cb5087ca | 405 | do { |
7257b535 | 406 | err = queue_userspace_packet(dp_ifindex, skb, upcall_info); |
982b8810 | 407 | if (err) |
7257b535 | 408 | break; |
856081f6 | 409 | |
7257b535 BP |
410 | if (skb == segs && skb_shinfo(skb)->gso_type & SKB_GSO_UDP) { |
411 | /* The initial flow key extracted by flow_extract() in | |
412 | * this case is for a first fragment, so we need to | |
413 | * properly mark later fragments. | |
414 | */ | |
415 | later_key = *upcall_info->key; | |
9e44d715 | 416 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
7257b535 BP |
417 | |
418 | later_info = *upcall_info; | |
419 | later_info.key = &later_key; | |
420 | upcall_info = &later_info; | |
421 | } | |
36ce148c | 422 | } while ((skb = skb->next)); |
cb5087ca | 423 | |
7257b535 BP |
424 | /* Free all of the segments. */ |
425 | skb = segs; | |
426 | do { | |
427 | nskb = skb->next; | |
428 | if (err) | |
429 | kfree_skb(skb); | |
430 | else | |
431 | consume_skb(skb); | |
432 | } while ((skb = nskb)); | |
433 | return err; | |
434 | } | |
435 | ||
436 | static int queue_userspace_packet(int dp_ifindex, struct sk_buff *skb, | |
437 | const struct dp_upcall_info *upcall_info) | |
438 | { | |
439 | struct ovs_header *upcall; | |
6161d3fd | 440 | struct sk_buff *nskb = NULL; |
7257b535 BP |
441 | struct sk_buff *user_skb; /* to be queued to userspace */ |
442 | struct nlattr *nla; | |
443 | unsigned int len; | |
444 | int err; | |
445 | ||
6161d3fd JG |
446 | if (vlan_tx_tag_present(skb)) { |
447 | nskb = skb_clone(skb, GFP_ATOMIC); | |
448 | if (!nskb) | |
449 | return -ENOMEM; | |
450 | ||
451 | err = vlan_deaccel_tag(nskb); | |
452 | if (err) | |
453 | return err; | |
7257b535 | 454 | |
6161d3fd JG |
455 | skb = nskb; |
456 | } | |
457 | ||
458 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
459 | err = -EFBIG; | |
460 | goto out; | |
461 | } | |
7257b535 BP |
462 | |
463 | len = sizeof(struct ovs_header); | |
464 | len += nla_total_size(skb->len); | |
465 | len += nla_total_size(FLOW_BUFSIZE); | |
466 | if (upcall_info->cmd == OVS_PACKET_CMD_ACTION) | |
467 | len += nla_total_size(8); | |
468 | ||
469 | user_skb = genlmsg_new(len, GFP_ATOMIC); | |
6161d3fd JG |
470 | if (!user_skb) { |
471 | err = -ENOMEM; | |
472 | goto out; | |
473 | } | |
7257b535 BP |
474 | |
475 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
476 | 0, upcall_info->cmd); | |
477 | upcall->dp_ifindex = dp_ifindex; | |
478 | ||
479 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
480 | flow_to_nlattrs(upcall_info->key, user_skb); | |
481 | nla_nest_end(user_skb, nla); | |
482 | ||
483 | if (upcall_info->userdata) | |
484 | nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA, | |
485 | nla_get_u64(upcall_info->userdata)); | |
486 | ||
487 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); | |
bed53bd1 PS |
488 | |
489 | skb_copy_and_csum_dev(skb, nla_data(nla)); | |
7257b535 | 490 | |
6161d3fd JG |
491 | err = genlmsg_unicast(&init_net, user_skb, upcall_info->pid); |
492 | ||
493 | out: | |
494 | kfree_skb(nskb); | |
495 | return err; | |
cb5087ca BP |
496 | } |
497 | ||
ed099e92 | 498 | /* Called with genl_mutex. */ |
254f2dc8 | 499 | static int flush_flows(int dp_ifindex) |
064af421 | 500 | { |
3544358a PS |
501 | struct flow_table *old_table; |
502 | struct flow_table *new_table; | |
9c52546b | 503 | struct datapath *dp; |
9c52546b | 504 | |
254f2dc8 | 505 | dp = get_dp(dp_ifindex); |
9c52546b | 506 | if (!dp) |
ed099e92 | 507 | return -ENODEV; |
8d5ebd83 | 508 | |
9c52546b | 509 | old_table = get_table_protected(dp); |
3544358a | 510 | new_table = flow_tbl_alloc(TBL_MIN_BUCKETS); |
8d5ebd83 | 511 | if (!new_table) |
ed099e92 | 512 | return -ENOMEM; |
8d5ebd83 JG |
513 | |
514 | rcu_assign_pointer(dp->table, new_table); | |
515 | ||
3544358a | 516 | flow_tbl_deferred_destroy(old_table); |
ed099e92 | 517 | return 0; |
064af421 BP |
518 | } |
519 | ||
4edb9ae9 PS |
520 | static int validate_actions(const struct nlattr *attr, |
521 | const struct sw_flow_key *key, int depth); | |
6ff686f2 | 522 | |
4edb9ae9 PS |
523 | static int validate_sample(const struct nlattr *attr, |
524 | const struct sw_flow_key *key, int depth) | |
6ff686f2 | 525 | { |
4be00e48 BP |
526 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; |
527 | const struct nlattr *probability, *actions; | |
528 | const struct nlattr *a; | |
529 | int rem; | |
530 | ||
531 | memset(attrs, 0, sizeof(attrs)); | |
6455100f | 532 | nla_for_each_nested(a, attr, rem) { |
4be00e48 BP |
533 | int type = nla_type(a); |
534 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
535 | return -EINVAL; | |
536 | attrs[type] = a; | |
537 | } | |
538 | if (rem) | |
6ff686f2 | 539 | return -EINVAL; |
4be00e48 BP |
540 | |
541 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
542 | if (!probability || nla_len(probability) != sizeof(u32)) | |
6ff686f2 PS |
543 | return -EINVAL; |
544 | ||
4be00e48 BP |
545 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; |
546 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
547 | return -EINVAL; | |
548 | return validate_actions(actions, key, depth + 1); | |
4edb9ae9 PS |
549 | } |
550 | ||
fea393b1 BP |
551 | static int validate_set(const struct nlattr *a, |
552 | const struct sw_flow_key *flow_key) | |
4edb9ae9 | 553 | { |
4edb9ae9 PS |
554 | const struct nlattr *ovs_key = nla_data(a); |
555 | int key_type = nla_type(ovs_key); | |
556 | ||
557 | /* There can be only one key in a action */ | |
558 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
559 | return -EINVAL; | |
560 | ||
561 | if (key_type > OVS_KEY_ATTR_MAX || | |
562 | nla_len(ovs_key) != ovs_key_lens[key_type]) | |
563 | return -EINVAL; | |
564 | ||
fea393b1 | 565 | switch (key_type) { |
4edb9ae9 | 566 | const struct ovs_key_ipv4 *ipv4_key; |
4edb9ae9 | 567 | |
fea393b1 BP |
568 | case OVS_KEY_ATTR_PRIORITY: |
569 | case OVS_KEY_ATTR_TUN_ID: | |
570 | case OVS_KEY_ATTR_ETHERNET: | |
4edb9ae9 PS |
571 | break; |
572 | ||
fea393b1 | 573 | case OVS_KEY_ATTR_IPV4: |
4edb9ae9 PS |
574 | if (flow_key->eth.type != htons(ETH_P_IP)) |
575 | return -EINVAL; | |
576 | ||
577 | if (!flow_key->ipv4.addr.src || !flow_key->ipv4.addr.dst) | |
578 | return -EINVAL; | |
579 | ||
580 | ipv4_key = nla_data(ovs_key); | |
581 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
582 | return -EINVAL; | |
583 | ||
9e44d715 | 584 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) |
7257b535 BP |
585 | return -EINVAL; |
586 | ||
4edb9ae9 PS |
587 | break; |
588 | ||
fea393b1 | 589 | case OVS_KEY_ATTR_TCP: |
4edb9ae9 PS |
590 | if (flow_key->ip.proto != IPPROTO_TCP) |
591 | return -EINVAL; | |
592 | ||
593 | if (!flow_key->ipv4.tp.src || !flow_key->ipv4.tp.dst) | |
594 | return -EINVAL; | |
595 | ||
596 | break; | |
597 | ||
fea393b1 | 598 | case OVS_KEY_ATTR_UDP: |
4edb9ae9 PS |
599 | if (flow_key->ip.proto != IPPROTO_UDP) |
600 | return -EINVAL; | |
601 | ||
602 | if (!flow_key->ipv4.tp.src || !flow_key->ipv4.tp.dst) | |
603 | return -EINVAL; | |
604 | break; | |
605 | ||
606 | default: | |
607 | return -EINVAL; | |
608 | } | |
fea393b1 | 609 | |
4edb9ae9 | 610 | return 0; |
6ff686f2 PS |
611 | } |
612 | ||
98403001 BP |
613 | static int validate_userspace(const struct nlattr *attr) |
614 | { | |
6455100f | 615 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { |
98403001 BP |
616 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, |
617 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_U64 }, | |
618 | }; | |
619 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
620 | int error; | |
621 | ||
6455100f PS |
622 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, |
623 | attr, userspace_policy); | |
98403001 BP |
624 | if (error) |
625 | return error; | |
626 | ||
6455100f PS |
627 | if (!a[OVS_USERSPACE_ATTR_PID] || |
628 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
98403001 BP |
629 | return -EINVAL; |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
4edb9ae9 PS |
634 | static int validate_actions(const struct nlattr *attr, |
635 | const struct sw_flow_key *key, int depth) | |
064af421 | 636 | { |
23cad98c | 637 | const struct nlattr *a; |
6ff686f2 PS |
638 | int rem, err; |
639 | ||
640 | if (depth >= SAMPLE_ACTION_DEPTH) | |
641 | return -EOVERFLOW; | |
23cad98c | 642 | |
37a1300c | 643 | nla_for_each_nested(a, attr, rem) { |
98403001 | 644 | /* Expected argument lengths, (u32)-1 for variable length. */ |
df2c07f4 | 645 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
fea393b1 | 646 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), |
98403001 | 647 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
fea393b1 BP |
648 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
649 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
4edb9ae9 | 650 | [OVS_ACTION_ATTR_SET] = (u32)-1, |
98403001 | 651 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1 |
23cad98c | 652 | }; |
fea393b1 | 653 | const struct ovs_action_push_vlan *vlan; |
23cad98c BP |
654 | int type = nla_type(a); |
655 | ||
6ff686f2 | 656 | if (type > OVS_ACTION_ATTR_MAX || |
98403001 BP |
657 | (action_lens[type] != nla_len(a) && |
658 | action_lens[type] != (u32)-1)) | |
23cad98c BP |
659 | return -EINVAL; |
660 | ||
661 | switch (type) { | |
df2c07f4 | 662 | case OVS_ACTION_ATTR_UNSPEC: |
cdee00fd | 663 | return -EINVAL; |
064af421 | 664 | |
98403001 BP |
665 | case OVS_ACTION_ATTR_USERSPACE: |
666 | err = validate_userspace(a); | |
667 | if (err) | |
668 | return err; | |
669 | break; | |
670 | ||
df2c07f4 | 671 | case OVS_ACTION_ATTR_OUTPUT: |
23cad98c BP |
672 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
673 | return -EINVAL; | |
3b1fc5f3 | 674 | break; |
cdee00fd | 675 | |
4edb9ae9 | 676 | |
fea393b1 BP |
677 | case OVS_ACTION_ATTR_POP_VLAN: |
678 | break; | |
679 | ||
680 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
681 | vlan = nla_data(a); | |
682 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
683 | return -EINVAL; | |
8ddc056d | 684 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) |
064af421 | 685 | return -EINVAL; |
23cad98c | 686 | break; |
064af421 | 687 | |
4edb9ae9 | 688 | case OVS_ACTION_ATTR_SET: |
fea393b1 | 689 | err = validate_set(a, key); |
4edb9ae9 PS |
690 | if (err) |
691 | return err; | |
23cad98c | 692 | break; |
064af421 | 693 | |
6ff686f2 | 694 | case OVS_ACTION_ATTR_SAMPLE: |
4edb9ae9 | 695 | err = validate_sample(a, key, depth); |
6ff686f2 PS |
696 | if (err) |
697 | return err; | |
698 | break; | |
699 | ||
23cad98c | 700 | default: |
4edb9ae9 | 701 | return -EINVAL; |
23cad98c BP |
702 | } |
703 | } | |
3c5f6de3 | 704 | |
23cad98c BP |
705 | if (rem > 0) |
706 | return -EINVAL; | |
064af421 | 707 | |
23cad98c | 708 | return 0; |
064af421 | 709 | } |
4edb9ae9 | 710 | |
064af421 BP |
711 | static void clear_stats(struct sw_flow *flow) |
712 | { | |
6bfafa55 | 713 | flow->used = 0; |
064af421 | 714 | flow->tcp_flags = 0; |
064af421 BP |
715 | flow->packet_count = 0; |
716 | flow->byte_count = 0; | |
717 | } | |
718 | ||
df2c07f4 | 719 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 720 | { |
df2c07f4 | 721 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 722 | struct nlattr **a = info->attrs; |
e0e57990 | 723 | struct sw_flow_actions *acts; |
982b8810 | 724 | struct sk_buff *packet; |
e0e57990 | 725 | struct sw_flow *flow; |
f7cd0081 | 726 | struct datapath *dp; |
d6569377 | 727 | struct ethhdr *eth; |
3f19d399 | 728 | int len; |
d6569377 | 729 | int err; |
76abe283 | 730 | int key_len; |
064af421 | 731 | |
f7cd0081 | 732 | err = -EINVAL; |
df2c07f4 JP |
733 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
734 | !a[OVS_PACKET_ATTR_ACTIONS] || | |
735 | nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN) | |
e5cad958 | 736 | goto err; |
064af421 | 737 | |
df2c07f4 | 738 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 739 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
740 | err = -ENOMEM; |
741 | if (!packet) | |
e5cad958 | 742 | goto err; |
3f19d399 BP |
743 | skb_reserve(packet, NET_IP_ALIGN); |
744 | ||
df2c07f4 | 745 | memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len); |
8d5ebd83 | 746 | |
f7cd0081 BP |
747 | skb_reset_mac_header(packet); |
748 | eth = eth_hdr(packet); | |
064af421 | 749 | |
d6569377 BP |
750 | /* Normally, setting the skb 'protocol' field would be handled by a |
751 | * call to eth_type_trans(), but it assumes there's a sending | |
752 | * device, which we may not have. */ | |
753 | if (ntohs(eth->h_proto) >= 1536) | |
f7cd0081 | 754 | packet->protocol = eth->h_proto; |
d6569377 | 755 | else |
f7cd0081 | 756 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 757 | |
e0e57990 BP |
758 | /* Build an sw_flow for sending this packet. */ |
759 | flow = flow_alloc(); | |
760 | err = PTR_ERR(flow); | |
761 | if (IS_ERR(flow)) | |
e5cad958 | 762 | goto err_kfree_skb; |
064af421 | 763 | |
7257b535 | 764 | err = flow_extract(packet, -1, &flow->key, &key_len); |
e0e57990 BP |
765 | if (err) |
766 | goto err_flow_put; | |
e0e57990 | 767 | |
abff858b PS |
768 | err = flow_metadata_from_nlattrs(&flow->key.phy.priority, |
769 | &flow->key.phy.in_port, | |
770 | &flow->key.phy.tun_id, | |
df2c07f4 | 771 | a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 BP |
772 | if (err) |
773 | goto err_flow_put; | |
774 | ||
4edb9ae9 PS |
775 | err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0); |
776 | if (err) | |
777 | goto err_flow_put; | |
778 | ||
3544358a | 779 | flow->hash = flow_hash(&flow->key, key_len); |
0fe255df | 780 | |
df2c07f4 | 781 | acts = flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]); |
e0e57990 BP |
782 | err = PTR_ERR(acts); |
783 | if (IS_ERR(acts)) | |
784 | goto err_flow_put; | |
785 | rcu_assign_pointer(flow->sf_acts, acts); | |
786 | ||
787 | OVS_CB(packet)->flow = flow; | |
abff858b | 788 | packet->priority = flow->key.phy.priority; |
e0e57990 | 789 | |
d6569377 | 790 | rcu_read_lock(); |
df2c07f4 | 791 | dp = get_dp(ovs_header->dp_ifindex); |
f7cd0081 | 792 | err = -ENODEV; |
e5cad958 BP |
793 | if (!dp) |
794 | goto err_unlock; | |
cc4015df | 795 | |
e9141eec | 796 | local_bh_disable(); |
a4af2475 | 797 | err = execute_actions(dp, packet); |
e9141eec | 798 | local_bh_enable(); |
d6569377 | 799 | rcu_read_unlock(); |
e0e57990 BP |
800 | |
801 | flow_put(flow); | |
e5cad958 | 802 | return err; |
064af421 | 803 | |
e5cad958 BP |
804 | err_unlock: |
805 | rcu_read_unlock(); | |
e0e57990 BP |
806 | err_flow_put: |
807 | flow_put(flow); | |
e5cad958 BP |
808 | err_kfree_skb: |
809 | kfree_skb(packet); | |
810 | err: | |
d6569377 | 811 | return err; |
064af421 BP |
812 | } |
813 | ||
df2c07f4 JP |
814 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
815 | [OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC }, | |
816 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, | |
817 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
818 | }; |
819 | ||
820 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 821 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
822 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
823 | .policy = packet_policy, | |
df2c07f4 | 824 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
825 | } |
826 | }; | |
827 | ||
df2c07f4 | 828 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) |
064af421 | 829 | { |
d6569377 | 830 | int i; |
3544358a | 831 | struct flow_table *table = get_table_protected(dp); |
f180c2e2 | 832 | |
3544358a | 833 | stats->n_flows = flow_tbl_count(table); |
064af421 | 834 | |
7257b535 | 835 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
d6569377 BP |
836 | for_each_possible_cpu(i) { |
837 | const struct dp_stats_percpu *percpu_stats; | |
838 | struct dp_stats_percpu local_stats; | |
839 | unsigned seqcount; | |
44e05eca | 840 | |
d6569377 | 841 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 842 | |
d6569377 BP |
843 | do { |
844 | seqcount = read_seqcount_begin(&percpu_stats->seqlock); | |
845 | local_stats = *percpu_stats; | |
846 | } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount)); | |
064af421 | 847 | |
d6569377 BP |
848 | stats->n_hit += local_stats.n_hit; |
849 | stats->n_missed += local_stats.n_missed; | |
850 | stats->n_lost += local_stats.n_lost; | |
851 | } | |
852 | } | |
064af421 | 853 | |
df2c07f4 JP |
854 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
855 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
856 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
857 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 858 | }; |
36956a7d | 859 | |
37a1300c BP |
860 | static struct genl_family dp_flow_genl_family = { |
861 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
862 | .hdrsize = sizeof(struct ovs_header), |
863 | .name = OVS_FLOW_FAMILY, | |
69685a88 | 864 | .version = OVS_FLOW_VERSION, |
df2c07f4 | 865 | .maxattr = OVS_FLOW_ATTR_MAX |
37a1300c | 866 | }; |
ed099e92 | 867 | |
37a1300c | 868 | static struct genl_multicast_group dp_flow_multicast_group = { |
df2c07f4 | 869 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
870 | }; |
871 | ||
872 | /* Called with genl_lock. */ | |
df2c07f4 | 873 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
6455100f PS |
874 | struct sk_buff *skb, u32 pid, |
875 | u32 seq, u32 flags, u8 cmd) | |
d6569377 | 876 | { |
37a1300c | 877 | const int skb_orig_len = skb->len; |
d6569377 | 878 | const struct sw_flow_actions *sf_acts; |
df2c07f4 JP |
879 | struct ovs_flow_stats stats; |
880 | struct ovs_header *ovs_header; | |
d6569377 BP |
881 | struct nlattr *nla; |
882 | unsigned long used; | |
883 | u8 tcp_flags; | |
884 | int err; | |
064af421 | 885 | |
d6569377 | 886 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 887 | lockdep_genl_is_held()); |
064af421 | 888 | |
df2c07f4 JP |
889 | ovs_header = genlmsg_put(skb, pid, seq, &dp_flow_genl_family, flags, cmd); |
890 | if (!ovs_header) | |
37a1300c | 891 | return -EMSGSIZE; |
d6569377 | 892 | |
99769a40 | 893 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 894 | |
df2c07f4 | 895 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
896 | if (!nla) |
897 | goto nla_put_failure; | |
898 | err = flow_to_nlattrs(&flow->key, skb); | |
899 | if (err) | |
37a1300c | 900 | goto error; |
d6569377 BP |
901 | nla_nest_end(skb, nla); |
902 | ||
903 | spin_lock_bh(&flow->lock); | |
904 | used = flow->used; | |
905 | stats.n_packets = flow->packet_count; | |
906 | stats.n_bytes = flow->byte_count; | |
907 | tcp_flags = flow->tcp_flags; | |
908 | spin_unlock_bh(&flow->lock); | |
909 | ||
910 | if (used) | |
df2c07f4 | 911 | NLA_PUT_U64(skb, OVS_FLOW_ATTR_USED, flow_used_time(used)); |
d6569377 BP |
912 | |
913 | if (stats.n_packets) | |
6455100f PS |
914 | NLA_PUT(skb, OVS_FLOW_ATTR_STATS, |
915 | sizeof(struct ovs_flow_stats), &stats); | |
d6569377 BP |
916 | |
917 | if (tcp_flags) | |
df2c07f4 | 918 | NLA_PUT_U8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags); |
d6569377 | 919 | |
df2c07f4 | 920 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
921 | * this is the first flow to be dumped into 'skb'. This is unusual for |
922 | * Netlink but individual action lists can be longer than | |
923 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
924 | * The userspace caller can always fetch the actions separately if it | |
925 | * really wants them. (Most userspace callers in fact don't care.) | |
926 | * | |
927 | * This can only fail for dump operations because the skb is always | |
928 | * properly sized for single flows. | |
929 | */ | |
df2c07f4 | 930 | err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len, |
30053024 BP |
931 | sf_acts->actions); |
932 | if (err < 0 && skb_orig_len) | |
933 | goto error; | |
37a1300c | 934 | |
df2c07f4 | 935 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
936 | |
937 | nla_put_failure: | |
938 | err = -EMSGSIZE; | |
37a1300c | 939 | error: |
df2c07f4 | 940 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 941 | return err; |
44e05eca BP |
942 | } |
943 | ||
df2c07f4 | 944 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) |
44e05eca | 945 | { |
37a1300c BP |
946 | const struct sw_flow_actions *sf_acts; |
947 | int len; | |
d6569377 | 948 | |
37a1300c BP |
949 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
950 | lockdep_genl_is_held()); | |
d6569377 | 951 | |
6455100f PS |
952 | /* OVS_FLOW_ATTR_KEY */ |
953 | len = nla_total_size(FLOW_BUFSIZE); | |
954 | /* OVS_FLOW_ATTR_ACTIONS */ | |
955 | len += nla_total_size(sf_acts->actions_len); | |
956 | /* OVS_FLOW_ATTR_STATS */ | |
957 | len += nla_total_size(sizeof(struct ovs_flow_stats)); | |
958 | /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
959 | len += nla_total_size(1); | |
960 | /* OVS_FLOW_ATTR_USED */ | |
961 | len += nla_total_size(8); | |
962 | ||
963 | len += NLMSG_ALIGN(sizeof(struct ovs_header)); | |
964 | ||
965 | return genlmsg_new(len, GFP_KERNEL); | |
37a1300c | 966 | } |
8d5ebd83 | 967 | |
6455100f PS |
968 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, |
969 | struct datapath *dp, | |
37a1300c BP |
970 | u32 pid, u32 seq, u8 cmd) |
971 | { | |
972 | struct sk_buff *skb; | |
973 | int retval; | |
d6569377 | 974 | |
df2c07f4 | 975 | skb = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
976 | if (!skb) |
977 | return ERR_PTR(-ENOMEM); | |
d6569377 | 978 | |
df2c07f4 | 979 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, pid, seq, 0, cmd); |
37a1300c | 980 | BUG_ON(retval < 0); |
d6569377 | 981 | return skb; |
064af421 BP |
982 | } |
983 | ||
df2c07f4 | 984 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 985 | { |
37a1300c | 986 | struct nlattr **a = info->attrs; |
df2c07f4 | 987 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 988 | struct sw_flow_key key; |
d6569377 | 989 | struct sw_flow *flow; |
37a1300c | 990 | struct sk_buff *reply; |
9c52546b | 991 | struct datapath *dp; |
3544358a | 992 | struct flow_table *table; |
bc4a05c6 | 993 | int error; |
76abe283 | 994 | int key_len; |
064af421 | 995 | |
37a1300c BP |
996 | /* Extract key. */ |
997 | error = -EINVAL; | |
df2c07f4 | 998 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 999 | goto error; |
df2c07f4 | 1000 | error = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1001 | if (error) |
1002 | goto error; | |
064af421 | 1003 | |
37a1300c | 1004 | /* Validate actions. */ |
df2c07f4 | 1005 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
4edb9ae9 | 1006 | error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0); |
37a1300c BP |
1007 | if (error) |
1008 | goto error; | |
df2c07f4 | 1009 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
1010 | error = -EINVAL; |
1011 | goto error; | |
1012 | } | |
1013 | ||
df2c07f4 | 1014 | dp = get_dp(ovs_header->dp_ifindex); |
d6569377 | 1015 | error = -ENODEV; |
9c52546b | 1016 | if (!dp) |
37a1300c | 1017 | goto error; |
704a1e09 | 1018 | |
d6569377 | 1019 | table = get_table_protected(dp); |
3544358a PS |
1020 | flow = flow_tbl_lookup(table, &key, key_len); |
1021 | if (!flow) { | |
d6569377 BP |
1022 | struct sw_flow_actions *acts; |
1023 | ||
1024 | /* Bail out if we're not allowed to create a new flow. */ | |
1025 | error = -ENOENT; | |
df2c07f4 | 1026 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
37a1300c | 1027 | goto error; |
d6569377 BP |
1028 | |
1029 | /* Expand table, if necessary, to make room. */ | |
3544358a PS |
1030 | if (flow_tbl_need_to_expand(table)) { |
1031 | struct flow_table *new_table; | |
1032 | ||
1033 | new_table = flow_tbl_expand(table); | |
1034 | if (!IS_ERR(new_table)) { | |
1035 | rcu_assign_pointer(dp->table, new_table); | |
1036 | flow_tbl_deferred_destroy(table); | |
1037 | table = get_table_protected(dp); | |
1038 | } | |
d6569377 BP |
1039 | } |
1040 | ||
1041 | /* Allocate flow. */ | |
1042 | flow = flow_alloc(); | |
1043 | if (IS_ERR(flow)) { | |
1044 | error = PTR_ERR(flow); | |
37a1300c | 1045 | goto error; |
d6569377 | 1046 | } |
37a1300c | 1047 | flow->key = key; |
d6569377 BP |
1048 | clear_stats(flow); |
1049 | ||
1050 | /* Obtain actions. */ | |
df2c07f4 | 1051 | acts = flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]); |
d6569377 BP |
1052 | error = PTR_ERR(acts); |
1053 | if (IS_ERR(acts)) | |
1054 | goto error_free_flow; | |
1055 | rcu_assign_pointer(flow->sf_acts, acts); | |
1056 | ||
d6569377 | 1057 | /* Put flow in bucket. */ |
3544358a PS |
1058 | flow->hash = flow_hash(&key, key_len); |
1059 | flow_tbl_insert(table, flow); | |
37a1300c | 1060 | |
df2c07f4 | 1061 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
6455100f PS |
1062 | info->snd_seq, |
1063 | OVS_FLOW_CMD_NEW); | |
d6569377 BP |
1064 | } else { |
1065 | /* We found a matching flow. */ | |
1066 | struct sw_flow_actions *old_acts; | |
6455100f | 1067 | struct nlattr *acts_attrs; |
d6569377 BP |
1068 | |
1069 | /* Bail out if we're not allowed to modify an existing flow. | |
1070 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1071 | * because Generic Netlink treats the latter as a dump | |
1072 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1073 | * gets fixed. | |
1074 | */ | |
1075 | error = -EEXIST; | |
df2c07f4 | 1076 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c BP |
1077 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
1078 | goto error; | |
d6569377 BP |
1079 | |
1080 | /* Update actions. */ | |
d6569377 | 1081 | old_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 1082 | lockdep_genl_is_held()); |
6455100f PS |
1083 | acts_attrs = a[OVS_FLOW_ATTR_ACTIONS]; |
1084 | if (acts_attrs && | |
1085 | (old_acts->actions_len != nla_len(acts_attrs) || | |
1086 | memcmp(old_acts->actions, nla_data(acts_attrs), | |
1087 | old_acts->actions_len))) { | |
d6569377 BP |
1088 | struct sw_flow_actions *new_acts; |
1089 | ||
6455100f | 1090 | new_acts = flow_actions_alloc(acts_attrs); |
d6569377 BP |
1091 | error = PTR_ERR(new_acts); |
1092 | if (IS_ERR(new_acts)) | |
37a1300c | 1093 | goto error; |
d6569377 BP |
1094 | |
1095 | rcu_assign_pointer(flow->sf_acts, new_acts); | |
1096 | flow_deferred_free_acts(old_acts); | |
1097 | } | |
1098 | ||
df2c07f4 | 1099 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
6455100f | 1100 | info->snd_seq, OVS_FLOW_CMD_NEW); |
d6569377 BP |
1101 | |
1102 | /* Clear stats. */ | |
df2c07f4 | 1103 | if (a[OVS_FLOW_ATTR_CLEAR]) { |
d6569377 BP |
1104 | spin_lock_bh(&flow->lock); |
1105 | clear_stats(flow); | |
1106 | spin_unlock_bh(&flow->lock); | |
1107 | } | |
9c52546b | 1108 | } |
37a1300c BP |
1109 | |
1110 | if (!IS_ERR(reply)) | |
1111 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
6455100f | 1112 | dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); |
37a1300c BP |
1113 | else |
1114 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1115 | dp_flow_multicast_group.id, PTR_ERR(reply)); | |
d6569377 | 1116 | return 0; |
704a1e09 | 1117 | |
d6569377 BP |
1118 | error_free_flow: |
1119 | flow_put(flow); | |
37a1300c | 1120 | error: |
9c52546b | 1121 | return error; |
704a1e09 BP |
1122 | } |
1123 | ||
df2c07f4 | 1124 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1125 | { |
37a1300c | 1126 | struct nlattr **a = info->attrs; |
df2c07f4 | 1127 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1128 | struct sw_flow_key key; |
37a1300c | 1129 | struct sk_buff *reply; |
704a1e09 | 1130 | struct sw_flow *flow; |
9c52546b | 1131 | struct datapath *dp; |
3544358a | 1132 | struct flow_table *table; |
9c52546b | 1133 | int err; |
76abe283 | 1134 | int key_len; |
704a1e09 | 1135 | |
df2c07f4 | 1136 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1137 | return -EINVAL; |
df2c07f4 | 1138 | err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1139 | if (err) |
1140 | return err; | |
704a1e09 | 1141 | |
df2c07f4 | 1142 | dp = get_dp(ovs_header->dp_ifindex); |
9c52546b | 1143 | if (!dp) |
ed099e92 | 1144 | return -ENODEV; |
704a1e09 | 1145 | |
9c52546b | 1146 | table = get_table_protected(dp); |
3544358a PS |
1147 | flow = flow_tbl_lookup(table, &key, key_len); |
1148 | if (!flow) | |
ed099e92 | 1149 | return -ENOENT; |
d6569377 | 1150 | |
6455100f PS |
1151 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
1152 | info->snd_seq, OVS_FLOW_CMD_NEW); | |
37a1300c BP |
1153 | if (IS_ERR(reply)) |
1154 | return PTR_ERR(reply); | |
36956a7d | 1155 | |
37a1300c | 1156 | return genlmsg_reply(reply, info); |
d6569377 | 1157 | } |
9c52546b | 1158 | |
df2c07f4 | 1159 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1160 | { |
37a1300c | 1161 | struct nlattr **a = info->attrs; |
df2c07f4 | 1162 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1163 | struct sw_flow_key key; |
37a1300c | 1164 | struct sk_buff *reply; |
d6569377 | 1165 | struct sw_flow *flow; |
d6569377 | 1166 | struct datapath *dp; |
3544358a | 1167 | struct flow_table *table; |
d6569377 | 1168 | int err; |
76abe283 | 1169 | int key_len; |
36956a7d | 1170 | |
df2c07f4 JP |
1171 | if (!a[OVS_FLOW_ATTR_KEY]) |
1172 | return flush_flows(ovs_header->dp_ifindex); | |
1173 | err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); | |
37a1300c BP |
1174 | if (err) |
1175 | return err; | |
d6569377 | 1176 | |
df2c07f4 | 1177 | dp = get_dp(ovs_header->dp_ifindex); |
d6569377 | 1178 | if (!dp) |
6455100f | 1179 | return -ENODEV; |
d6569377 | 1180 | |
37a1300c | 1181 | table = get_table_protected(dp); |
3544358a PS |
1182 | flow = flow_tbl_lookup(table, &key, key_len); |
1183 | if (!flow) | |
37a1300c | 1184 | return -ENOENT; |
d6569377 | 1185 | |
df2c07f4 | 1186 | reply = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1187 | if (!reply) |
1188 | return -ENOMEM; | |
1189 | ||
3544358a | 1190 | flow_tbl_remove(table, flow); |
37a1300c | 1191 | |
df2c07f4 JP |
1192 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_pid, |
1193 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); | |
37a1300c BP |
1194 | BUG_ON(err < 0); |
1195 | ||
1196 | flow_deferred_free(flow); | |
1197 | ||
1198 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1199 | dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1200 | return 0; | |
1201 | } | |
1202 | ||
df2c07f4 | 1203 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1204 | { |
df2c07f4 | 1205 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
37a1300c BP |
1206 | struct datapath *dp; |
1207 | ||
df2c07f4 | 1208 | dp = get_dp(ovs_header->dp_ifindex); |
37a1300c BP |
1209 | if (!dp) |
1210 | return -ENODEV; | |
1211 | ||
1212 | for (;;) { | |
37a1300c BP |
1213 | struct sw_flow *flow; |
1214 | u32 bucket, obj; | |
1215 | ||
1216 | bucket = cb->args[0]; | |
1217 | obj = cb->args[1]; | |
3544358a PS |
1218 | flow = flow_tbl_next(get_table_protected(dp), &bucket, &obj); |
1219 | if (!flow) | |
37a1300c BP |
1220 | break; |
1221 | ||
6455100f PS |
1222 | if (ovs_flow_cmd_fill_info(flow, dp, skb, |
1223 | NETLINK_CB(cb->skb).pid, | |
37a1300c | 1224 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1225 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1226 | break; |
1227 | ||
1228 | cb->args[0] = bucket; | |
1229 | cb->args[1] = obj; | |
1230 | } | |
1231 | return skb->len; | |
704a1e09 BP |
1232 | } |
1233 | ||
37a1300c | 1234 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1235 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1236 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1237 | .policy = flow_policy, | |
df2c07f4 | 1238 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1239 | }, |
df2c07f4 | 1240 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1241 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1242 | .policy = flow_policy, | |
df2c07f4 | 1243 | .doit = ovs_flow_cmd_del |
37a1300c | 1244 | }, |
df2c07f4 | 1245 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1246 | .flags = 0, /* OK for unprivileged users. */ |
1247 | .policy = flow_policy, | |
df2c07f4 JP |
1248 | .doit = ovs_flow_cmd_get, |
1249 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1250 | }, |
df2c07f4 | 1251 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1252 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1253 | .policy = flow_policy, | |
df2c07f4 | 1254 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1255 | }, |
1256 | }; | |
1257 | ||
df2c07f4 | 1258 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
aaff4b55 | 1259 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1260 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
aaff4b55 | 1261 | #endif |
b063d9f0 | 1262 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
d6569377 BP |
1263 | }; |
1264 | ||
aaff4b55 BP |
1265 | static struct genl_family dp_datapath_genl_family = { |
1266 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1267 | .hdrsize = sizeof(struct ovs_header), |
1268 | .name = OVS_DATAPATH_FAMILY, | |
69685a88 | 1269 | .version = OVS_DATAPATH_VERSION, |
df2c07f4 | 1270 | .maxattr = OVS_DP_ATTR_MAX |
aaff4b55 BP |
1271 | }; |
1272 | ||
1273 | static struct genl_multicast_group dp_datapath_multicast_group = { | |
df2c07f4 | 1274 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1275 | }; |
1276 | ||
df2c07f4 | 1277 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
aaff4b55 | 1278 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1279 | { |
df2c07f4 | 1280 | struct ovs_header *ovs_header; |
e926dfe3 | 1281 | struct ovs_dp_stats dp_stats; |
064af421 BP |
1282 | int err; |
1283 | ||
df2c07f4 | 1284 | ovs_header = genlmsg_put(skb, pid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1285 | flags, cmd); |
df2c07f4 | 1286 | if (!ovs_header) |
aaff4b55 | 1287 | goto error; |
064af421 | 1288 | |
b063d9f0 | 1289 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1290 | |
d6569377 | 1291 | rcu_read_lock(); |
df2c07f4 | 1292 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, dp_name(dp)); |
d6569377 | 1293 | rcu_read_unlock(); |
064af421 | 1294 | if (err) |
d6569377 | 1295 | goto nla_put_failure; |
064af421 | 1296 | |
e926dfe3 JG |
1297 | get_dp_stats(dp, &dp_stats); |
1298 | NLA_PUT(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats); | |
d6569377 | 1299 | |
df2c07f4 | 1300 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1301 | |
1302 | nla_put_failure: | |
df2c07f4 | 1303 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1304 | error: |
1305 | return -EMSGSIZE; | |
d6569377 BP |
1306 | } |
1307 | ||
df2c07f4 | 1308 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid, |
aaff4b55 | 1309 | u32 seq, u8 cmd) |
d6569377 | 1310 | { |
d6569377 | 1311 | struct sk_buff *skb; |
aaff4b55 | 1312 | int retval; |
d6569377 | 1313 | |
aaff4b55 | 1314 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
064af421 | 1315 | if (!skb) |
d6569377 | 1316 | return ERR_PTR(-ENOMEM); |
659586ef | 1317 | |
df2c07f4 | 1318 | retval = ovs_dp_cmd_fill_info(dp, skb, pid, seq, 0, cmd); |
aaff4b55 BP |
1319 | if (retval < 0) { |
1320 | kfree_skb(skb); | |
1321 | return ERR_PTR(retval); | |
1322 | } | |
1323 | return skb; | |
1324 | } | |
9dca7bd5 | 1325 | |
df2c07f4 | 1326 | static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
aaff4b55 | 1327 | { |
df2c07f4 | 1328 | return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1); |
d6569377 BP |
1329 | } |
1330 | ||
ed099e92 | 1331 | /* Called with genl_mutex and optionally with RTNL lock also. */ |
6455100f PS |
1332 | static struct datapath *lookup_datapath(struct ovs_header *ovs_header, |
1333 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) | |
d6569377 | 1334 | { |
254f2dc8 BP |
1335 | struct datapath *dp; |
1336 | ||
df2c07f4 JP |
1337 | if (!a[OVS_DP_ATTR_NAME]) |
1338 | dp = get_dp(ovs_header->dp_ifindex); | |
254f2dc8 | 1339 | else { |
d6569377 | 1340 | struct vport *vport; |
d6569377 | 1341 | |
057dd6d2 | 1342 | rcu_read_lock(); |
df2c07f4 JP |
1343 | vport = vport_locate(nla_data(a[OVS_DP_ATTR_NAME])); |
1344 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; | |
057dd6d2 | 1345 | rcu_read_unlock(); |
d6569377 | 1346 | } |
254f2dc8 | 1347 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1348 | } |
1349 | ||
df2c07f4 | 1350 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1351 | { |
aaff4b55 | 1352 | struct nlattr **a = info->attrs; |
d6569377 | 1353 | struct vport_parms parms; |
aaff4b55 | 1354 | struct sk_buff *reply; |
d6569377 BP |
1355 | struct datapath *dp; |
1356 | struct vport *vport; | |
d6569377 | 1357 | int err; |
d6569377 | 1358 | |
d6569377 | 1359 | err = -EINVAL; |
ea36840f | 1360 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1361 | goto err; |
1362 | ||
df2c07f4 | 1363 | err = ovs_dp_cmd_validate(a); |
aaff4b55 BP |
1364 | if (err) |
1365 | goto err; | |
d6569377 BP |
1366 | |
1367 | rtnl_lock(); | |
d6569377 BP |
1368 | err = -ENODEV; |
1369 | if (!try_module_get(THIS_MODULE)) | |
ed099e92 | 1370 | goto err_unlock_rtnl; |
d6569377 | 1371 | |
d6569377 BP |
1372 | err = -ENOMEM; |
1373 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1374 | if (dp == NULL) | |
1375 | goto err_put_module; | |
1376 | INIT_LIST_HEAD(&dp->port_list); | |
d6569377 BP |
1377 | |
1378 | /* Initialize kobject for bridge. This will be added as | |
1379 | * /sys/class/net/<devname>/brif later, if sysfs is enabled. */ | |
1380 | dp->ifobj.kset = NULL; | |
1381 | kobject_init(&dp->ifobj, &dp_ktype); | |
1382 | ||
1383 | /* Allocate table. */ | |
1384 | err = -ENOMEM; | |
3544358a | 1385 | rcu_assign_pointer(dp->table, flow_tbl_alloc(TBL_MIN_BUCKETS)); |
d6569377 BP |
1386 | if (!dp->table) |
1387 | goto err_free_dp; | |
1388 | ||
99769a40 JG |
1389 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); |
1390 | if (!dp->stats_percpu) { | |
1391 | err = -ENOMEM; | |
1392 | goto err_destroy_table; | |
1393 | } | |
1394 | ||
d6569377 | 1395 | /* Set up our datapath device. */ |
df2c07f4 JP |
1396 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1397 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1398 | parms.options = NULL; |
1399 | parms.dp = dp; | |
df2c07f4 | 1400 | parms.port_no = OVSP_LOCAL; |
ea36840f | 1401 | parms.upcall_pid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
b063d9f0 | 1402 | |
d6569377 BP |
1403 | vport = new_vport(&parms); |
1404 | if (IS_ERR(vport)) { | |
1405 | err = PTR_ERR(vport); | |
1406 | if (err == -EBUSY) | |
1407 | err = -EEXIST; | |
1408 | ||
99769a40 | 1409 | goto err_destroy_percpu; |
d6569377 | 1410 | } |
d6569377 | 1411 | |
6455100f PS |
1412 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, |
1413 | info->snd_seq, OVS_DP_CMD_NEW); | |
aaff4b55 BP |
1414 | err = PTR_ERR(reply); |
1415 | if (IS_ERR(reply)) | |
1416 | goto err_destroy_local_port; | |
1417 | ||
254f2dc8 | 1418 | list_add_tail(&dp->list_node, &dps); |
d6569377 BP |
1419 | dp_sysfs_add_dp(dp); |
1420 | ||
d6569377 BP |
1421 | rtnl_unlock(); |
1422 | ||
aaff4b55 BP |
1423 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1424 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
d6569377 BP |
1425 | return 0; |
1426 | ||
1427 | err_destroy_local_port: | |
df2c07f4 | 1428 | dp_detach_port(get_vport_protected(dp, OVSP_LOCAL)); |
99769a40 JG |
1429 | err_destroy_percpu: |
1430 | free_percpu(dp->stats_percpu); | |
d6569377 | 1431 | err_destroy_table: |
3544358a | 1432 | flow_tbl_destroy(get_table_protected(dp)); |
d6569377 | 1433 | err_free_dp: |
d6569377 BP |
1434 | kfree(dp); |
1435 | err_put_module: | |
1436 | module_put(THIS_MODULE); | |
ed099e92 | 1437 | err_unlock_rtnl: |
d6569377 | 1438 | rtnl_unlock(); |
d6569377 | 1439 | err: |
064af421 BP |
1440 | return err; |
1441 | } | |
1442 | ||
df2c07f4 | 1443 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1444 | { |
ed099e92 | 1445 | struct vport *vport, *next_vport; |
aaff4b55 | 1446 | struct sk_buff *reply; |
9c52546b | 1447 | struct datapath *dp; |
d6569377 | 1448 | int err; |
44e05eca | 1449 | |
df2c07f4 | 1450 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 | 1451 | if (err) |
d6569377 | 1452 | goto exit; |
44e05eca | 1453 | |
d6569377 | 1454 | rtnl_lock(); |
aaff4b55 | 1455 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 BP |
1456 | err = PTR_ERR(dp); |
1457 | if (IS_ERR(dp)) | |
aaff4b55 BP |
1458 | goto exit_unlock; |
1459 | ||
6455100f PS |
1460 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, |
1461 | info->snd_seq, OVS_DP_CMD_DEL); | |
aaff4b55 BP |
1462 | err = PTR_ERR(reply); |
1463 | if (IS_ERR(reply)) | |
1464 | goto exit_unlock; | |
9c52546b | 1465 | |
6455100f | 1466 | list_for_each_entry_safe(vport, next_vport, &dp->port_list, node) |
df2c07f4 | 1467 | if (vport->port_no != OVSP_LOCAL) |
ed099e92 BP |
1468 | dp_detach_port(vport); |
1469 | ||
1470 | dp_sysfs_del_dp(dp); | |
254f2dc8 | 1471 | list_del(&dp->list_node); |
df2c07f4 | 1472 | dp_detach_port(get_vport_protected(dp, OVSP_LOCAL)); |
ed099e92 | 1473 | |
99620d2c JG |
1474 | /* rtnl_unlock() will wait until all the references to devices that |
1475 | * are pending unregistration have been dropped. We do it here to | |
1476 | * ensure that any internal devices (which contain DP pointers) are | |
1477 | * fully destroyed before freeing the datapath. | |
1478 | */ | |
1479 | rtnl_unlock(); | |
1480 | ||
ed099e92 BP |
1481 | call_rcu(&dp->rcu, destroy_dp_rcu); |
1482 | module_put(THIS_MODULE); | |
1483 | ||
aaff4b55 BP |
1484 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1485 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
99620d2c JG |
1486 | |
1487 | return 0; | |
d6569377 | 1488 | |
aaff4b55 | 1489 | exit_unlock: |
d6569377 BP |
1490 | rtnl_unlock(); |
1491 | exit: | |
1492 | return err; | |
44e05eca BP |
1493 | } |
1494 | ||
df2c07f4 | 1495 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1496 | { |
aaff4b55 | 1497 | struct sk_buff *reply; |
d6569377 | 1498 | struct datapath *dp; |
d6569377 | 1499 | int err; |
064af421 | 1500 | |
df2c07f4 | 1501 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1502 | if (err) |
1503 | return err; | |
38c6ecbc | 1504 | |
aaff4b55 | 1505 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 | 1506 | if (IS_ERR(dp)) |
aaff4b55 | 1507 | return PTR_ERR(dp); |
38c6ecbc | 1508 | |
6455100f PS |
1509 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, |
1510 | info->snd_seq, OVS_DP_CMD_NEW); | |
aaff4b55 BP |
1511 | if (IS_ERR(reply)) { |
1512 | err = PTR_ERR(reply); | |
1513 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1514 | dp_datapath_multicast_group.id, err); | |
1515 | return 0; | |
1516 | } | |
1517 | ||
1518 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1519 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1520 | return 0; | |
064af421 BP |
1521 | } |
1522 | ||
df2c07f4 | 1523 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1524 | { |
aaff4b55 | 1525 | struct sk_buff *reply; |
d6569377 | 1526 | struct datapath *dp; |
d6569377 | 1527 | int err; |
1dcf111b | 1528 | |
df2c07f4 | 1529 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1530 | if (err) |
1531 | return err; | |
1dcf111b | 1532 | |
aaff4b55 | 1533 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 | 1534 | if (IS_ERR(dp)) |
aaff4b55 | 1535 | return PTR_ERR(dp); |
1dcf111b | 1536 | |
6455100f PS |
1537 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, |
1538 | info->snd_seq, OVS_DP_CMD_NEW); | |
aaff4b55 BP |
1539 | if (IS_ERR(reply)) |
1540 | return PTR_ERR(reply); | |
1541 | ||
1542 | return genlmsg_reply(reply, info); | |
1dcf111b JP |
1543 | } |
1544 | ||
df2c07f4 | 1545 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1546 | { |
254f2dc8 BP |
1547 | struct datapath *dp; |
1548 | int skip = cb->args[0]; | |
1549 | int i = 0; | |
a7786963 | 1550 | |
6455100f | 1551 | list_for_each_entry(dp, &dps, list_node) { |
254f2dc8 | 1552 | if (i < skip) |
d6569377 | 1553 | continue; |
df2c07f4 | 1554 | if (ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid, |
aaff4b55 | 1555 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1556 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1557 | break; |
254f2dc8 | 1558 | i++; |
a7786963 | 1559 | } |
aaff4b55 | 1560 | |
254f2dc8 BP |
1561 | cb->args[0] = i; |
1562 | ||
aaff4b55 | 1563 | return skb->len; |
c19e6535 BP |
1564 | } |
1565 | ||
aaff4b55 | 1566 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1567 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1568 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1569 | .policy = datapath_policy, | |
df2c07f4 | 1570 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1571 | }, |
df2c07f4 | 1572 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1573 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1574 | .policy = datapath_policy, | |
df2c07f4 | 1575 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1576 | }, |
df2c07f4 | 1577 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1578 | .flags = 0, /* OK for unprivileged users. */ |
1579 | .policy = datapath_policy, | |
df2c07f4 JP |
1580 | .doit = ovs_dp_cmd_get, |
1581 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1582 | }, |
df2c07f4 | 1583 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1584 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1585 | .policy = datapath_policy, | |
df2c07f4 | 1586 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1587 | }, |
1588 | }; | |
1589 | ||
df2c07f4 | 1590 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
f0fef760 | 1591 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1592 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1593 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1594 | [OVS_VPORT_ATTR_ADDRESS] = { .len = ETH_ALEN }, |
f0fef760 | 1595 | #else |
f613a0d7 | 1596 | [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1597 | [OVS_VPORT_ATTR_ADDRESS] = { .minlen = ETH_ALEN }, |
f0fef760 | 1598 | #endif |
d48c88ec JG |
1599 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1600 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1601 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1602 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1603 | }; |
1604 | ||
f0fef760 BP |
1605 | static struct genl_family dp_vport_genl_family = { |
1606 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1607 | .hdrsize = sizeof(struct ovs_header), |
1608 | .name = OVS_VPORT_FAMILY, | |
69685a88 | 1609 | .version = OVS_VPORT_VERSION, |
df2c07f4 | 1610 | .maxattr = OVS_VPORT_ATTR_MAX |
f0fef760 BP |
1611 | }; |
1612 | ||
f14d8083 | 1613 | struct genl_multicast_group dp_vport_multicast_group = { |
df2c07f4 | 1614 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1615 | }; |
1616 | ||
1617 | /* Called with RTNL lock or RCU read lock. */ | |
df2c07f4 | 1618 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
f0fef760 | 1619 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1620 | { |
df2c07f4 | 1621 | struct ovs_header *ovs_header; |
e926dfe3 | 1622 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1623 | int err; |
1624 | ||
df2c07f4 | 1625 | ovs_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family, |
f0fef760 | 1626 | flags, cmd); |
df2c07f4 | 1627 | if (!ovs_header) |
f0fef760 | 1628 | return -EMSGSIZE; |
c19e6535 | 1629 | |
99769a40 | 1630 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1631 | |
df2c07f4 | 1632 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no); |
16b82e84 JG |
1633 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type); |
1634 | NLA_PUT_STRING(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)); | |
b063d9f0 | 1635 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_pid); |
c19e6535 | 1636 | |
e926dfe3 JG |
1637 | vport_get_stats(vport, &vport_stats); |
1638 | NLA_PUT(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), | |
1639 | &vport_stats); | |
c19e6535 | 1640 | |
16b82e84 JG |
1641 | NLA_PUT(skb, OVS_VPORT_ATTR_ADDRESS, ETH_ALEN, |
1642 | vport->ops->get_addr(vport)); | |
c19e6535 | 1643 | |
c19e6535 | 1644 | err = vport_get_options(vport, skb); |
f0fef760 BP |
1645 | if (err == -EMSGSIZE) |
1646 | goto error; | |
c19e6535 | 1647 | |
df2c07f4 | 1648 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1649 | |
1650 | nla_put_failure: | |
1651 | err = -EMSGSIZE; | |
f0fef760 | 1652 | error: |
df2c07f4 | 1653 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1654 | return err; |
064af421 BP |
1655 | } |
1656 | ||
f0fef760 | 1657 | /* Called with RTNL lock or RCU read lock. */ |
f14d8083 EJ |
1658 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid, |
1659 | u32 seq, u8 cmd) | |
064af421 | 1660 | { |
c19e6535 | 1661 | struct sk_buff *skb; |
f0fef760 | 1662 | int retval; |
c19e6535 | 1663 | |
f0fef760 | 1664 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1665 | if (!skb) |
1666 | return ERR_PTR(-ENOMEM); | |
1667 | ||
df2c07f4 | 1668 | retval = ovs_vport_cmd_fill_info(vport, skb, pid, seq, 0, cmd); |
f0fef760 BP |
1669 | if (retval < 0) { |
1670 | kfree_skb(skb); | |
1671 | return ERR_PTR(retval); | |
1672 | } | |
c19e6535 | 1673 | return skb; |
f0fef760 | 1674 | } |
c19e6535 | 1675 | |
df2c07f4 | 1676 | static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
f0fef760 | 1677 | { |
df2c07f4 | 1678 | return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1); |
c19e6535 | 1679 | } |
51d4d598 | 1680 | |
ed099e92 | 1681 | /* Called with RTNL lock or RCU read lock. */ |
df2c07f4 JP |
1682 | static struct vport *lookup_vport(struct ovs_header *ovs_header, |
1683 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) | |
c19e6535 BP |
1684 | { |
1685 | struct datapath *dp; | |
1686 | struct vport *vport; | |
1687 | ||
df2c07f4 JP |
1688 | if (a[OVS_VPORT_ATTR_NAME]) { |
1689 | vport = vport_locate(nla_data(a[OVS_VPORT_ATTR_NAME])); | |
ed099e92 | 1690 | if (!vport) |
c19e6535 | 1691 | return ERR_PTR(-ENODEV); |
c19e6535 | 1692 | return vport; |
df2c07f4 JP |
1693 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1694 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1695 | |
1696 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1697 | return ERR_PTR(-EFBIG); |
c19e6535 | 1698 | |
df2c07f4 | 1699 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 BP |
1700 | if (!dp) |
1701 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1702 | |
c19e6535 | 1703 | vport = get_vport_protected(dp, port_no); |
ed099e92 | 1704 | if (!vport) |
c19e6535 | 1705 | return ERR_PTR(-ENOENT); |
c19e6535 BP |
1706 | return vport; |
1707 | } else | |
1708 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1709 | } |
1710 | ||
ed099e92 | 1711 | /* Called with RTNL lock. */ |
6455100f PS |
1712 | static int change_vport(struct vport *vport, |
1713 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) | |
064af421 | 1714 | { |
c19e6535 | 1715 | int err = 0; |
f613a0d7 | 1716 | |
df2c07f4 | 1717 | if (a[OVS_VPORT_ATTR_STATS]) |
f613a0d7 PS |
1718 | vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); |
1719 | ||
1720 | if (a[OVS_VPORT_ATTR_ADDRESS]) | |
df2c07f4 | 1721 | err = vport_set_addr(vport, nla_data(a[OVS_VPORT_ATTR_ADDRESS])); |
f613a0d7 | 1722 | |
c19e6535 BP |
1723 | return err; |
1724 | } | |
1725 | ||
df2c07f4 | 1726 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1727 | { |
f0fef760 | 1728 | struct nlattr **a = info->attrs; |
df2c07f4 | 1729 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1730 | struct vport_parms parms; |
ed099e92 | 1731 | struct sk_buff *reply; |
c19e6535 | 1732 | struct vport *vport; |
c19e6535 | 1733 | struct datapath *dp; |
b0ec0f27 | 1734 | u32 port_no; |
c19e6535 | 1735 | int err; |
b0ec0f27 | 1736 | |
c19e6535 | 1737 | err = -EINVAL; |
ea36840f BP |
1738 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1739 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
f0fef760 BP |
1740 | goto exit; |
1741 | ||
df2c07f4 | 1742 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1743 | if (err) |
1744 | goto exit; | |
51d4d598 | 1745 | |
c19e6535 | 1746 | rtnl_lock(); |
df2c07f4 | 1747 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 BP |
1748 | err = -ENODEV; |
1749 | if (!dp) | |
ed099e92 | 1750 | goto exit_unlock; |
c19e6535 | 1751 | |
df2c07f4 JP |
1752 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1753 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1754 | |
1755 | err = -EFBIG; | |
1756 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 1757 | goto exit_unlock; |
c19e6535 BP |
1758 | |
1759 | vport = get_vport_protected(dp, port_no); | |
1760 | err = -EBUSY; | |
1761 | if (vport) | |
ed099e92 | 1762 | goto exit_unlock; |
c19e6535 BP |
1763 | } else { |
1764 | for (port_no = 1; ; port_no++) { | |
1765 | if (port_no >= DP_MAX_PORTS) { | |
1766 | err = -EFBIG; | |
ed099e92 | 1767 | goto exit_unlock; |
c19e6535 BP |
1768 | } |
1769 | vport = get_vport_protected(dp, port_no); | |
1770 | if (!vport) | |
1771 | break; | |
51d4d598 | 1772 | } |
064af421 | 1773 | } |
b0ec0f27 | 1774 | |
df2c07f4 JP |
1775 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1776 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1777 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1778 | parms.dp = dp; |
1779 | parms.port_no = port_no; | |
ea36840f | 1780 | parms.upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 BP |
1781 | |
1782 | vport = new_vport(&parms); | |
1783 | err = PTR_ERR(vport); | |
1784 | if (IS_ERR(vport)) | |
ed099e92 | 1785 | goto exit_unlock; |
c19e6535 | 1786 | |
6455100f | 1787 | dp_sysfs_add_if(vport); |
c19e6535 BP |
1788 | |
1789 | err = change_vport(vport, a); | |
f0fef760 | 1790 | if (!err) { |
df2c07f4 | 1791 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, |
6455100f PS |
1792 | info->snd_seq, |
1793 | OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1794 | if (IS_ERR(reply)) |
1795 | err = PTR_ERR(reply); | |
1796 | } | |
c19e6535 BP |
1797 | if (err) { |
1798 | dp_detach_port(vport); | |
ed099e92 | 1799 | goto exit_unlock; |
c19e6535 | 1800 | } |
f0fef760 BP |
1801 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1802 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
c19e6535 | 1803 | |
c19e6535 | 1804 | |
ed099e92 | 1805 | exit_unlock: |
c19e6535 | 1806 | rtnl_unlock(); |
c19e6535 BP |
1807 | exit: |
1808 | return err; | |
44e05eca BP |
1809 | } |
1810 | ||
df2c07f4 | 1811 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1812 | { |
f0fef760 BP |
1813 | struct nlattr **a = info->attrs; |
1814 | struct sk_buff *reply; | |
c19e6535 | 1815 | struct vport *vport; |
c19e6535 | 1816 | int err; |
44e05eca | 1817 | |
df2c07f4 | 1818 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1819 | if (err) |
c19e6535 BP |
1820 | goto exit; |
1821 | ||
1822 | rtnl_lock(); | |
f0fef760 | 1823 | vport = lookup_vport(info->userhdr, a); |
c19e6535 BP |
1824 | err = PTR_ERR(vport); |
1825 | if (IS_ERR(vport)) | |
f0fef760 | 1826 | goto exit_unlock; |
44e05eca | 1827 | |
c19e6535 | 1828 | err = 0; |
6455100f | 1829 | if (a[OVS_VPORT_ATTR_TYPE] && |
16b82e84 | 1830 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) |
4879d4c7 | 1831 | err = -EINVAL; |
6455100f | 1832 | |
4879d4c7 | 1833 | if (!err && a[OVS_VPORT_ATTR_OPTIONS]) |
df2c07f4 | 1834 | err = vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
c19e6535 BP |
1835 | if (!err) |
1836 | err = change_vport(vport, a); | |
b063d9f0 JG |
1837 | if (!err && a[OVS_VPORT_ATTR_UPCALL_PID]) |
1838 | vport->upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); | |
c19e6535 | 1839 | |
df2c07f4 JP |
1840 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1841 | OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1842 | if (IS_ERR(reply)) { |
1843 | err = PTR_ERR(reply); | |
1844 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1845 | dp_vport_multicast_group.id, err); | |
1846 | return 0; | |
1847 | } | |
1848 | ||
1849 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1850 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1851 | ||
1852 | exit_unlock: | |
c19e6535 BP |
1853 | rtnl_unlock(); |
1854 | exit: | |
1855 | return err; | |
064af421 BP |
1856 | } |
1857 | ||
df2c07f4 | 1858 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1859 | { |
f0fef760 BP |
1860 | struct nlattr **a = info->attrs; |
1861 | struct sk_buff *reply; | |
c19e6535 | 1862 | struct vport *vport; |
c19e6535 BP |
1863 | int err; |
1864 | ||
df2c07f4 | 1865 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1866 | if (err) |
c19e6535 BP |
1867 | goto exit; |
1868 | ||
1869 | rtnl_lock(); | |
f0fef760 | 1870 | vport = lookup_vport(info->userhdr, a); |
c19e6535 | 1871 | err = PTR_ERR(vport); |
f0fef760 BP |
1872 | if (IS_ERR(vport)) |
1873 | goto exit_unlock; | |
c19e6535 | 1874 | |
df2c07f4 | 1875 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
1876 | err = -EINVAL; |
1877 | goto exit_unlock; | |
1878 | } | |
1879 | ||
df2c07f4 JP |
1880 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1881 | OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
1882 | err = PTR_ERR(reply); |
1883 | if (IS_ERR(reply)) | |
1884 | goto exit_unlock; | |
1885 | ||
3544358a | 1886 | dp_detach_port(vport); |
f0fef760 BP |
1887 | |
1888 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1889 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1890 | ||
1891 | exit_unlock: | |
c19e6535 BP |
1892 | rtnl_unlock(); |
1893 | exit: | |
1894 | return err; | |
7c40efc9 BP |
1895 | } |
1896 | ||
df2c07f4 | 1897 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1898 | { |
f0fef760 | 1899 | struct nlattr **a = info->attrs; |
df2c07f4 | 1900 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 1901 | struct sk_buff *reply; |
c19e6535 | 1902 | struct vport *vport; |
c19e6535 BP |
1903 | int err; |
1904 | ||
df2c07f4 | 1905 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1906 | if (err) |
1907 | goto exit; | |
c19e6535 | 1908 | |
ed099e92 | 1909 | rcu_read_lock(); |
df2c07f4 | 1910 | vport = lookup_vport(ovs_header, a); |
c19e6535 BP |
1911 | err = PTR_ERR(vport); |
1912 | if (IS_ERR(vport)) | |
f0fef760 | 1913 | goto exit_unlock; |
c19e6535 | 1914 | |
df2c07f4 JP |
1915 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1916 | OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
1917 | err = PTR_ERR(reply); |
1918 | if (IS_ERR(reply)) | |
f0fef760 | 1919 | goto exit_unlock; |
ed099e92 | 1920 | |
df2fa9b5 JG |
1921 | rcu_read_unlock(); |
1922 | ||
1923 | return genlmsg_reply(reply, info); | |
ed099e92 | 1924 | |
f0fef760 | 1925 | exit_unlock: |
ed099e92 | 1926 | rcu_read_unlock(); |
f0fef760 | 1927 | exit: |
c19e6535 BP |
1928 | return err; |
1929 | } | |
1930 | ||
df2c07f4 | 1931 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 1932 | { |
df2c07f4 | 1933 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 BP |
1934 | struct datapath *dp; |
1935 | u32 port_no; | |
f0fef760 | 1936 | int retval; |
c19e6535 | 1937 | |
df2c07f4 | 1938 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 | 1939 | if (!dp) |
f0fef760 | 1940 | return -ENODEV; |
ed099e92 BP |
1941 | |
1942 | rcu_read_lock(); | |
f0fef760 | 1943 | for (port_no = cb->args[0]; port_no < DP_MAX_PORTS; port_no++) { |
ed099e92 | 1944 | struct vport *vport; |
ed099e92 BP |
1945 | |
1946 | vport = get_vport_protected(dp, port_no); | |
1947 | if (!vport) | |
1948 | continue; | |
1949 | ||
df2c07f4 | 1950 | if (ovs_vport_cmd_fill_info(vport, skb, NETLINK_CB(cb->skb).pid, |
f0fef760 | 1951 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1952 | OVS_VPORT_CMD_NEW) < 0) |
f0fef760 | 1953 | break; |
c19e6535 | 1954 | } |
ed099e92 | 1955 | rcu_read_unlock(); |
c19e6535 | 1956 | |
f0fef760 BP |
1957 | cb->args[0] = port_no; |
1958 | retval = skb->len; | |
1959 | ||
1960 | return retval; | |
7c40efc9 BP |
1961 | } |
1962 | ||
f0fef760 | 1963 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 1964 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
1965 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1966 | .policy = vport_policy, | |
df2c07f4 | 1967 | .doit = ovs_vport_cmd_new |
f0fef760 | 1968 | }, |
df2c07f4 | 1969 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
1970 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1971 | .policy = vport_policy, | |
df2c07f4 | 1972 | .doit = ovs_vport_cmd_del |
f0fef760 | 1973 | }, |
df2c07f4 | 1974 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
1975 | .flags = 0, /* OK for unprivileged users. */ |
1976 | .policy = vport_policy, | |
df2c07f4 JP |
1977 | .doit = ovs_vport_cmd_get, |
1978 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 1979 | }, |
df2c07f4 | 1980 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
1981 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1982 | .policy = vport_policy, | |
df2c07f4 | 1983 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
1984 | }, |
1985 | }; | |
1986 | ||
982b8810 BP |
1987 | struct genl_family_and_ops { |
1988 | struct genl_family *family; | |
1989 | struct genl_ops *ops; | |
1990 | int n_ops; | |
1991 | struct genl_multicast_group *group; | |
1992 | }; | |
ed099e92 | 1993 | |
982b8810 | 1994 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
1995 | { &dp_datapath_genl_family, |
1996 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
1997 | &dp_datapath_multicast_group }, | |
f0fef760 BP |
1998 | { &dp_vport_genl_family, |
1999 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
2000 | &dp_vport_multicast_group }, | |
37a1300c BP |
2001 | { &dp_flow_genl_family, |
2002 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
2003 | &dp_flow_multicast_group }, | |
982b8810 BP |
2004 | { &dp_packet_genl_family, |
2005 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
2006 | NULL }, | |
2007 | }; | |
ed099e92 | 2008 | |
982b8810 BP |
2009 | static void dp_unregister_genl(int n_families) |
2010 | { | |
2011 | int i; | |
ed099e92 | 2012 | |
b867ca75 | 2013 | for (i = 0; i < n_families; i++) |
982b8810 | 2014 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
2015 | } |
2016 | ||
982b8810 | 2017 | static int dp_register_genl(void) |
064af421 | 2018 | { |
982b8810 BP |
2019 | int n_registered; |
2020 | int err; | |
2021 | int i; | |
064af421 | 2022 | |
982b8810 BP |
2023 | n_registered = 0; |
2024 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2025 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 2026 | |
982b8810 BP |
2027 | err = genl_register_family_with_ops(f->family, f->ops, |
2028 | f->n_ops); | |
2029 | if (err) | |
2030 | goto error; | |
2031 | n_registered++; | |
e22d4953 | 2032 | |
982b8810 BP |
2033 | if (f->group) { |
2034 | err = genl_register_mc_group(f->family, f->group); | |
2035 | if (err) | |
2036 | goto error; | |
2037 | } | |
2038 | } | |
9cc8b4e4 | 2039 | |
982b8810 | 2040 | return 0; |
064af421 BP |
2041 | |
2042 | error: | |
982b8810 BP |
2043 | dp_unregister_genl(n_registered); |
2044 | return err; | |
064af421 BP |
2045 | } |
2046 | ||
22d24ebf BP |
2047 | static int __init dp_init(void) |
2048 | { | |
f2459fe7 | 2049 | struct sk_buff *dummy_skb; |
22d24ebf BP |
2050 | int err; |
2051 | ||
f2459fe7 | 2052 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb)); |
22d24ebf | 2053 | |
dc5f3fef | 2054 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
6455100f | 2055 | VERSION BUILDNR); |
064af421 | 2056 | |
3544358a | 2057 | err = tnl_init(); |
064af421 BP |
2058 | if (err) |
2059 | goto error; | |
2060 | ||
3544358a PS |
2061 | err = flow_init(); |
2062 | if (err) | |
2063 | goto error_tnl_exit; | |
2064 | ||
f2459fe7 | 2065 | err = vport_init(); |
064af421 BP |
2066 | if (err) |
2067 | goto error_flow_exit; | |
2068 | ||
f2459fe7 JG |
2069 | err = register_netdevice_notifier(&dp_device_notifier); |
2070 | if (err) | |
2071 | goto error_vport_exit; | |
2072 | ||
982b8810 BP |
2073 | err = dp_register_genl(); |
2074 | if (err < 0) | |
37a1300c | 2075 | goto error_unreg_notifier; |
982b8810 | 2076 | |
064af421 BP |
2077 | return 0; |
2078 | ||
2079 | error_unreg_notifier: | |
2080 | unregister_netdevice_notifier(&dp_device_notifier); | |
f2459fe7 JG |
2081 | error_vport_exit: |
2082 | vport_exit(); | |
064af421 BP |
2083 | error_flow_exit: |
2084 | flow_exit(); | |
3544358a PS |
2085 | error_tnl_exit: |
2086 | tnl_exit(); | |
064af421 BP |
2087 | error: |
2088 | return err; | |
2089 | } | |
2090 | ||
2091 | static void dp_cleanup(void) | |
2092 | { | |
2093 | rcu_barrier(); | |
982b8810 | 2094 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
064af421 | 2095 | unregister_netdevice_notifier(&dp_device_notifier); |
f2459fe7 | 2096 | vport_exit(); |
064af421 | 2097 | flow_exit(); |
3544358a | 2098 | tnl_exit(); |
064af421 BP |
2099 | } |
2100 | ||
2101 | module_init(dp_init); | |
2102 | module_exit(dp_cleanup); | |
2103 | ||
2104 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2105 | MODULE_LICENSE("GPL"); |