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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 | |
f2459fe7 JG |
115 | /* Must be called with rcu_read_lock or RTNL lock. */ |
116 | const char *dp_name(const struct datapath *dp) | |
117 | { | |
16b82e84 JG |
118 | struct vport *vport = rcu_dereference_rtnl(dp->ports[OVSP_LOCAL]); |
119 | return vport->ops->get_name(vport); | |
f2459fe7 JG |
120 | } |
121 | ||
99769a40 JG |
122 | static int get_dpifindex(struct datapath *dp) |
123 | { | |
124 | struct vport *local; | |
125 | int ifindex; | |
126 | ||
127 | rcu_read_lock(); | |
128 | ||
cbbf4e1e | 129 | local = rcu_dereference(dp->ports[OVSP_LOCAL]); |
99769a40 | 130 | if (local) |
16b82e84 | 131 | ifindex = local->ops->get_ifindex(local); |
99769a40 JG |
132 | else |
133 | ifindex = 0; | |
134 | ||
135 | rcu_read_unlock(); | |
136 | ||
137 | return ifindex; | |
138 | } | |
139 | ||
6455100f | 140 | static size_t br_nlmsg_size(void) |
064af421 BP |
141 | { |
142 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
143 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
144 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
145 | + nla_total_size(4) /* IFLA_MASTER */ | |
146 | + nla_total_size(4) /* IFLA_MTU */ | |
064af421 BP |
147 | + nla_total_size(1); /* IFLA_OPERSTATE */ |
148 | } | |
149 | ||
ed099e92 | 150 | /* Caller must hold RTNL lock. */ |
064af421 | 151 | static int dp_fill_ifinfo(struct sk_buff *skb, |
e779d8d9 | 152 | const struct vport *port, |
064af421 BP |
153 | int event, unsigned int flags) |
154 | { | |
027f9007 | 155 | struct datapath *dp = port->dp; |
064af421 BP |
156 | struct ifinfomsg *hdr; |
157 | struct nlmsghdr *nlh; | |
158 | ||
16b82e84 JG |
159 | if (!port->ops->get_ifindex) |
160 | return -ENODEV; | |
f2459fe7 | 161 | |
064af421 BP |
162 | nlh = nlmsg_put(skb, 0, 0, event, sizeof(*hdr), flags); |
163 | if (nlh == NULL) | |
164 | return -EMSGSIZE; | |
165 | ||
166 | hdr = nlmsg_data(nlh); | |
167 | hdr->ifi_family = AF_BRIDGE; | |
168 | hdr->__ifi_pad = 0; | |
f2459fe7 | 169 | hdr->ifi_type = ARPHRD_ETHER; |
16b82e84 JG |
170 | hdr->ifi_index = port->ops->get_ifindex(port); |
171 | hdr->ifi_flags = port->ops->get_dev_flags(port); | |
064af421 BP |
172 | hdr->ifi_change = 0; |
173 | ||
16b82e84 | 174 | NLA_PUT_STRING(skb, IFLA_IFNAME, port->ops->get_name(port)); |
99769a40 | 175 | NLA_PUT_U32(skb, IFLA_MASTER, get_dpifindex(dp)); |
16b82e84 | 176 | NLA_PUT_U32(skb, IFLA_MTU, port->ops->get_mtu(port)); |
064af421 BP |
177 | #ifdef IFLA_OPERSTATE |
178 | NLA_PUT_U8(skb, IFLA_OPERSTATE, | |
16b82e84 JG |
179 | port->ops->is_running(port) |
180 | ? port->ops->get_operstate(port) | |
f2459fe7 | 181 | : IF_OPER_DOWN); |
064af421 BP |
182 | #endif |
183 | ||
16b82e84 | 184 | NLA_PUT(skb, IFLA_ADDRESS, ETH_ALEN, port->ops->get_addr(port)); |
064af421 | 185 | |
064af421 BP |
186 | return nlmsg_end(skb, nlh); |
187 | ||
188 | nla_put_failure: | |
189 | nlmsg_cancel(skb, nlh); | |
190 | return -EMSGSIZE; | |
191 | } | |
192 | ||
ed099e92 | 193 | /* Caller must hold RTNL lock. */ |
e779d8d9 | 194 | static void dp_ifinfo_notify(int event, struct vport *port) |
064af421 | 195 | { |
064af421 | 196 | struct sk_buff *skb; |
16b82e84 | 197 | int err; |
064af421 BP |
198 | |
199 | skb = nlmsg_new(br_nlmsg_size(), GFP_KERNEL); | |
16b82e84 JG |
200 | if (!skb) { |
201 | err = -ENOBUFS; | |
202 | goto err; | |
203 | } | |
064af421 BP |
204 | |
205 | err = dp_fill_ifinfo(skb, port, event, 0); | |
206 | if (err < 0) { | |
16b82e84 JG |
207 | if (err == -ENODEV) { |
208 | goto out; | |
209 | } else { | |
210 | /* -EMSGSIZE implies BUG in br_nlmsg_size() */ | |
211 | WARN_ON(err == -EMSGSIZE); | |
212 | goto err; | |
213 | } | |
064af421 | 214 | } |
16b82e84 | 215 | |
f2459fe7 | 216 | rtnl_notify(skb, &init_net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); |
16b82e84 | 217 | |
cfe7c1f5 | 218 | return; |
16b82e84 JG |
219 | err: |
220 | rtnl_set_sk_err(&init_net, RTNLGRP_LINK, err); | |
221 | out: | |
222 | kfree_skb(skb); | |
064af421 BP |
223 | } |
224 | ||
58c342f6 BP |
225 | static void release_dp(struct kobject *kobj) |
226 | { | |
227 | struct datapath *dp = container_of(kobj, struct datapath, ifobj); | |
228 | kfree(dp); | |
229 | } | |
230 | ||
35f7605b | 231 | static struct kobj_type dp_ktype = { |
58c342f6 BP |
232 | .release = release_dp |
233 | }; | |
234 | ||
46c6a11d JG |
235 | static void destroy_dp_rcu(struct rcu_head *rcu) |
236 | { | |
237 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 238 | |
be2ba156 | 239 | flow_tbl_destroy((__force struct flow_table *)dp->table); |
46c6a11d JG |
240 | free_percpu(dp->stats_percpu); |
241 | kobject_put(&dp->ifobj); | |
242 | } | |
243 | ||
ed099e92 | 244 | /* Called with RTNL lock and genl_lock. */ |
c19e6535 | 245 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 246 | { |
f2459fe7 | 247 | struct vport *vport; |
f2459fe7 | 248 | |
c19e6535 BP |
249 | vport = vport_add(parms); |
250 | if (!IS_ERR(vport)) { | |
251 | struct datapath *dp = parms->dp; | |
064af421 | 252 | |
c19e6535 | 253 | rcu_assign_pointer(dp->ports[parms->port_no], vport); |
ed099e92 | 254 | list_add(&vport->node, &dp->port_list); |
064af421 | 255 | |
c19e6535 BP |
256 | dp_ifinfo_notify(RTM_NEWLINK, vport); |
257 | } | |
064af421 | 258 | |
c19e6535 | 259 | return vport; |
064af421 BP |
260 | } |
261 | ||
ed099e92 | 262 | /* Called with RTNL lock. */ |
3544358a | 263 | void dp_detach_port(struct vport *p) |
064af421 BP |
264 | { |
265 | ASSERT_RTNL(); | |
266 | ||
df2c07f4 | 267 | if (p->port_no != OVSP_LOCAL) |
0515ceb3 | 268 | dp_sysfs_del_if(p); |
064af421 BP |
269 | dp_ifinfo_notify(RTM_DELLINK, p); |
270 | ||
064af421 | 271 | /* First drop references to device. */ |
ed099e92 | 272 | list_del(&p->node); |
064af421 | 273 | rcu_assign_pointer(p->dp->ports[p->port_no], NULL); |
f2459fe7 | 274 | |
7237e4f4 | 275 | /* Then destroy it. */ |
3544358a | 276 | vport_del(p); |
064af421 BP |
277 | } |
278 | ||
8819fac7 | 279 | /* Must be called with rcu_read_lock. */ |
e779d8d9 | 280 | void dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
281 | { |
282 | struct datapath *dp = p->dp; | |
3544358a | 283 | struct sw_flow *flow; |
064af421 | 284 | struct dp_stats_percpu *stats; |
e9141eec | 285 | u64 *stats_counter; |
4c1ad233 | 286 | int error; |
064af421 | 287 | |
e9141eec | 288 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); |
a063b0df | 289 | |
3976f6d5 | 290 | if (!OVS_CB(skb)->flow) { |
36956a7d | 291 | struct sw_flow_key key; |
76abe283 | 292 | int key_len; |
4c1ad233 | 293 | |
3976f6d5 | 294 | /* Extract flow from 'skb' into 'key'. */ |
7257b535 | 295 | error = flow_extract(skb, p->port_no, &key, &key_len); |
3976f6d5 JG |
296 | if (unlikely(error)) { |
297 | kfree_skb(skb); | |
298 | return; | |
299 | } | |
064af421 | 300 | |
3976f6d5 | 301 | /* Look up flow. */ |
6455100f PS |
302 | flow = flow_tbl_lookup(rcu_dereference(dp->table), |
303 | &key, key_len); | |
3544358a | 304 | if (unlikely(!flow)) { |
856081f6 BP |
305 | struct dp_upcall_info upcall; |
306 | ||
df2c07f4 | 307 | upcall.cmd = OVS_PACKET_CMD_MISS; |
856081f6 | 308 | upcall.key = &key; |
98403001 BP |
309 | upcall.userdata = NULL; |
310 | upcall.pid = p->upcall_pid; | |
856081f6 | 311 | dp_upcall(dp, skb, &upcall); |
d9e214da | 312 | consume_skb(skb); |
e9141eec | 313 | stats_counter = &stats->n_missed; |
3976f6d5 JG |
314 | goto out; |
315 | } | |
316 | ||
3544358a | 317 | OVS_CB(skb)->flow = flow; |
55574bb0 BP |
318 | } |
319 | ||
e9141eec | 320 | stats_counter = &stats->n_hit; |
3976f6d5 | 321 | flow_used(OVS_CB(skb)->flow, skb); |
a4af2475 | 322 | execute_actions(dp, skb); |
55574bb0 | 323 | |
8819fac7 | 324 | out: |
55574bb0 | 325 | /* Update datapath statistics. */ |
821cb9fa | 326 | u64_stats_update_begin(&stats->sync); |
e9141eec | 327 | (*stats_counter)++; |
821cb9fa | 328 | u64_stats_update_end(&stats->sync); |
064af421 BP |
329 | } |
330 | ||
aa5a8fdc JG |
331 | static struct genl_family dp_packet_genl_family = { |
332 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
333 | .hdrsize = sizeof(struct ovs_header), |
334 | .name = OVS_PACKET_FAMILY, | |
69685a88 | 335 | .version = OVS_PACKET_VERSION, |
df2c07f4 | 336 | .maxattr = OVS_PACKET_ATTR_MAX |
aa5a8fdc JG |
337 | }; |
338 | ||
36ce148c PS |
339 | int dp_upcall(struct datapath *dp, struct sk_buff *skb, |
340 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc JG |
341 | { |
342 | struct dp_stats_percpu *stats; | |
7257b535 | 343 | int dp_ifindex; |
aa5a8fdc JG |
344 | int err; |
345 | ||
98403001 | 346 | if (upcall_info->pid == 0) { |
b063d9f0 | 347 | err = -ENOTCONN; |
b063d9f0 JG |
348 | goto err; |
349 | } | |
350 | ||
7257b535 BP |
351 | dp_ifindex = get_dpifindex(dp); |
352 | if (!dp_ifindex) { | |
353 | err = -ENODEV; | |
354 | goto err; | |
aa5a8fdc JG |
355 | } |
356 | ||
7257b535 | 357 | forward_ip_summed(skb, true); |
36ce148c | 358 | |
7257b535 BP |
359 | if (!skb_is_gso(skb)) |
360 | err = queue_userspace_packet(dp_ifindex, skb, upcall_info); | |
361 | else | |
362 | err = queue_gso_packets(dp_ifindex, skb, upcall_info); | |
d76195db JG |
363 | if (err) |
364 | goto err; | |
365 | ||
366 | return 0; | |
aa5a8fdc | 367 | |
aa5a8fdc | 368 | err: |
aa5a8fdc JG |
369 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); |
370 | ||
821cb9fa | 371 | u64_stats_update_begin(&stats->sync); |
aa5a8fdc | 372 | stats->n_lost++; |
821cb9fa | 373 | u64_stats_update_end(&stats->sync); |
aa5a8fdc | 374 | |
aa5a8fdc | 375 | return err; |
982b8810 BP |
376 | } |
377 | ||
7257b535 BP |
378 | static int queue_gso_packets(int dp_ifindex, struct sk_buff *skb, |
379 | const struct dp_upcall_info *upcall_info) | |
cb5087ca | 380 | { |
7257b535 BP |
381 | struct dp_upcall_info later_info; |
382 | struct sw_flow_key later_key; | |
383 | struct sk_buff *segs, *nskb; | |
384 | int err; | |
cb5087ca | 385 | |
7257b535 BP |
386 | segs = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM); |
387 | if (IS_ERR(skb)) | |
388 | return PTR_ERR(skb); | |
99769a40 | 389 | |
7257b535 BP |
390 | /* Queue all of the segments. */ |
391 | skb = segs; | |
cb5087ca | 392 | do { |
7257b535 | 393 | err = queue_userspace_packet(dp_ifindex, skb, upcall_info); |
982b8810 | 394 | if (err) |
7257b535 | 395 | break; |
856081f6 | 396 | |
7257b535 BP |
397 | if (skb == segs && skb_shinfo(skb)->gso_type & SKB_GSO_UDP) { |
398 | /* The initial flow key extracted by flow_extract() in | |
399 | * this case is for a first fragment, so we need to | |
400 | * properly mark later fragments. | |
401 | */ | |
402 | later_key = *upcall_info->key; | |
9e44d715 | 403 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
7257b535 BP |
404 | |
405 | later_info = *upcall_info; | |
406 | later_info.key = &later_key; | |
407 | upcall_info = &later_info; | |
408 | } | |
36ce148c | 409 | } while ((skb = skb->next)); |
cb5087ca | 410 | |
7257b535 BP |
411 | /* Free all of the segments. */ |
412 | skb = segs; | |
413 | do { | |
414 | nskb = skb->next; | |
415 | if (err) | |
416 | kfree_skb(skb); | |
417 | else | |
418 | consume_skb(skb); | |
419 | } while ((skb = nskb)); | |
420 | return err; | |
421 | } | |
422 | ||
423 | static int queue_userspace_packet(int dp_ifindex, struct sk_buff *skb, | |
424 | const struct dp_upcall_info *upcall_info) | |
425 | { | |
426 | struct ovs_header *upcall; | |
6161d3fd | 427 | struct sk_buff *nskb = NULL; |
7257b535 BP |
428 | struct sk_buff *user_skb; /* to be queued to userspace */ |
429 | struct nlattr *nla; | |
430 | unsigned int len; | |
431 | int err; | |
432 | ||
6161d3fd JG |
433 | if (vlan_tx_tag_present(skb)) { |
434 | nskb = skb_clone(skb, GFP_ATOMIC); | |
435 | if (!nskb) | |
436 | return -ENOMEM; | |
437 | ||
438 | err = vlan_deaccel_tag(nskb); | |
439 | if (err) | |
440 | return err; | |
7257b535 | 441 | |
6161d3fd JG |
442 | skb = nskb; |
443 | } | |
444 | ||
445 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
446 | err = -EFBIG; | |
447 | goto out; | |
448 | } | |
7257b535 BP |
449 | |
450 | len = sizeof(struct ovs_header); | |
451 | len += nla_total_size(skb->len); | |
452 | len += nla_total_size(FLOW_BUFSIZE); | |
453 | if (upcall_info->cmd == OVS_PACKET_CMD_ACTION) | |
454 | len += nla_total_size(8); | |
455 | ||
456 | user_skb = genlmsg_new(len, GFP_ATOMIC); | |
6161d3fd JG |
457 | if (!user_skb) { |
458 | err = -ENOMEM; | |
459 | goto out; | |
460 | } | |
7257b535 BP |
461 | |
462 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
463 | 0, upcall_info->cmd); | |
464 | upcall->dp_ifindex = dp_ifindex; | |
465 | ||
466 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
467 | flow_to_nlattrs(upcall_info->key, user_skb); | |
468 | nla_nest_end(user_skb, nla); | |
469 | ||
470 | if (upcall_info->userdata) | |
471 | nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA, | |
472 | nla_get_u64(upcall_info->userdata)); | |
473 | ||
474 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); | |
bed53bd1 PS |
475 | |
476 | skb_copy_and_csum_dev(skb, nla_data(nla)); | |
7257b535 | 477 | |
6161d3fd JG |
478 | err = genlmsg_unicast(&init_net, user_skb, upcall_info->pid); |
479 | ||
480 | out: | |
481 | kfree_skb(nskb); | |
482 | return err; | |
cb5087ca BP |
483 | } |
484 | ||
ed099e92 | 485 | /* Called with genl_mutex. */ |
254f2dc8 | 486 | static int flush_flows(int dp_ifindex) |
064af421 | 487 | { |
3544358a PS |
488 | struct flow_table *old_table; |
489 | struct flow_table *new_table; | |
9c52546b | 490 | struct datapath *dp; |
9c52546b | 491 | |
254f2dc8 | 492 | dp = get_dp(dp_ifindex); |
9c52546b | 493 | if (!dp) |
ed099e92 | 494 | return -ENODEV; |
8d5ebd83 | 495 | |
20d035b2 | 496 | old_table = genl_dereference(dp->table); |
3544358a | 497 | new_table = flow_tbl_alloc(TBL_MIN_BUCKETS); |
8d5ebd83 | 498 | if (!new_table) |
ed099e92 | 499 | return -ENOMEM; |
8d5ebd83 JG |
500 | |
501 | rcu_assign_pointer(dp->table, new_table); | |
502 | ||
3544358a | 503 | flow_tbl_deferred_destroy(old_table); |
ed099e92 | 504 | return 0; |
064af421 BP |
505 | } |
506 | ||
4edb9ae9 PS |
507 | static int validate_actions(const struct nlattr *attr, |
508 | const struct sw_flow_key *key, int depth); | |
6ff686f2 | 509 | |
4edb9ae9 PS |
510 | static int validate_sample(const struct nlattr *attr, |
511 | const struct sw_flow_key *key, int depth) | |
6ff686f2 | 512 | { |
4be00e48 BP |
513 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; |
514 | const struct nlattr *probability, *actions; | |
515 | const struct nlattr *a; | |
516 | int rem; | |
517 | ||
518 | memset(attrs, 0, sizeof(attrs)); | |
6455100f | 519 | nla_for_each_nested(a, attr, rem) { |
4be00e48 BP |
520 | int type = nla_type(a); |
521 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
522 | return -EINVAL; | |
523 | attrs[type] = a; | |
524 | } | |
525 | if (rem) | |
6ff686f2 | 526 | return -EINVAL; |
4be00e48 BP |
527 | |
528 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
529 | if (!probability || nla_len(probability) != sizeof(u32)) | |
6ff686f2 PS |
530 | return -EINVAL; |
531 | ||
4be00e48 BP |
532 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; |
533 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
534 | return -EINVAL; | |
535 | return validate_actions(actions, key, depth + 1); | |
4edb9ae9 PS |
536 | } |
537 | ||
fea393b1 BP |
538 | static int validate_set(const struct nlattr *a, |
539 | const struct sw_flow_key *flow_key) | |
4edb9ae9 | 540 | { |
4edb9ae9 PS |
541 | const struct nlattr *ovs_key = nla_data(a); |
542 | int key_type = nla_type(ovs_key); | |
543 | ||
544 | /* There can be only one key in a action */ | |
545 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
546 | return -EINVAL; | |
547 | ||
548 | if (key_type > OVS_KEY_ATTR_MAX || | |
549 | nla_len(ovs_key) != ovs_key_lens[key_type]) | |
550 | return -EINVAL; | |
551 | ||
fea393b1 | 552 | switch (key_type) { |
4edb9ae9 | 553 | const struct ovs_key_ipv4 *ipv4_key; |
4edb9ae9 | 554 | |
fea393b1 BP |
555 | case OVS_KEY_ATTR_PRIORITY: |
556 | case OVS_KEY_ATTR_TUN_ID: | |
557 | case OVS_KEY_ATTR_ETHERNET: | |
4edb9ae9 PS |
558 | break; |
559 | ||
fea393b1 | 560 | case OVS_KEY_ATTR_IPV4: |
4edb9ae9 PS |
561 | if (flow_key->eth.type != htons(ETH_P_IP)) |
562 | return -EINVAL; | |
563 | ||
564 | if (!flow_key->ipv4.addr.src || !flow_key->ipv4.addr.dst) | |
565 | return -EINVAL; | |
566 | ||
567 | ipv4_key = nla_data(ovs_key); | |
568 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
569 | return -EINVAL; | |
570 | ||
9e44d715 | 571 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) |
7257b535 BP |
572 | return -EINVAL; |
573 | ||
4edb9ae9 PS |
574 | break; |
575 | ||
fea393b1 | 576 | case OVS_KEY_ATTR_TCP: |
4edb9ae9 PS |
577 | if (flow_key->ip.proto != IPPROTO_TCP) |
578 | return -EINVAL; | |
579 | ||
580 | if (!flow_key->ipv4.tp.src || !flow_key->ipv4.tp.dst) | |
581 | return -EINVAL; | |
582 | ||
583 | break; | |
584 | ||
fea393b1 | 585 | case OVS_KEY_ATTR_UDP: |
4edb9ae9 PS |
586 | if (flow_key->ip.proto != IPPROTO_UDP) |
587 | return -EINVAL; | |
588 | ||
589 | if (!flow_key->ipv4.tp.src || !flow_key->ipv4.tp.dst) | |
590 | return -EINVAL; | |
591 | break; | |
592 | ||
593 | default: | |
594 | return -EINVAL; | |
595 | } | |
fea393b1 | 596 | |
4edb9ae9 | 597 | return 0; |
6ff686f2 PS |
598 | } |
599 | ||
98403001 BP |
600 | static int validate_userspace(const struct nlattr *attr) |
601 | { | |
6455100f | 602 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { |
98403001 BP |
603 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, |
604 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_U64 }, | |
605 | }; | |
606 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
607 | int error; | |
608 | ||
6455100f PS |
609 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, |
610 | attr, userspace_policy); | |
98403001 BP |
611 | if (error) |
612 | return error; | |
613 | ||
6455100f PS |
614 | if (!a[OVS_USERSPACE_ATTR_PID] || |
615 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
98403001 BP |
616 | return -EINVAL; |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
4edb9ae9 PS |
621 | static int validate_actions(const struct nlattr *attr, |
622 | const struct sw_flow_key *key, int depth) | |
064af421 | 623 | { |
23cad98c | 624 | const struct nlattr *a; |
6ff686f2 PS |
625 | int rem, err; |
626 | ||
627 | if (depth >= SAMPLE_ACTION_DEPTH) | |
628 | return -EOVERFLOW; | |
23cad98c | 629 | |
37a1300c | 630 | nla_for_each_nested(a, attr, rem) { |
98403001 | 631 | /* Expected argument lengths, (u32)-1 for variable length. */ |
df2c07f4 | 632 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
fea393b1 | 633 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), |
98403001 | 634 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
fea393b1 BP |
635 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
636 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
4edb9ae9 | 637 | [OVS_ACTION_ATTR_SET] = (u32)-1, |
98403001 | 638 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1 |
23cad98c | 639 | }; |
fea393b1 | 640 | const struct ovs_action_push_vlan *vlan; |
23cad98c BP |
641 | int type = nla_type(a); |
642 | ||
6ff686f2 | 643 | if (type > OVS_ACTION_ATTR_MAX || |
98403001 BP |
644 | (action_lens[type] != nla_len(a) && |
645 | action_lens[type] != (u32)-1)) | |
23cad98c BP |
646 | return -EINVAL; |
647 | ||
648 | switch (type) { | |
df2c07f4 | 649 | case OVS_ACTION_ATTR_UNSPEC: |
cdee00fd | 650 | return -EINVAL; |
064af421 | 651 | |
98403001 BP |
652 | case OVS_ACTION_ATTR_USERSPACE: |
653 | err = validate_userspace(a); | |
654 | if (err) | |
655 | return err; | |
656 | break; | |
657 | ||
df2c07f4 | 658 | case OVS_ACTION_ATTR_OUTPUT: |
23cad98c BP |
659 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
660 | return -EINVAL; | |
3b1fc5f3 | 661 | break; |
cdee00fd | 662 | |
4edb9ae9 | 663 | |
fea393b1 BP |
664 | case OVS_ACTION_ATTR_POP_VLAN: |
665 | break; | |
666 | ||
667 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
668 | vlan = nla_data(a); | |
669 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
670 | return -EINVAL; | |
8ddc056d | 671 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) |
064af421 | 672 | return -EINVAL; |
23cad98c | 673 | break; |
064af421 | 674 | |
4edb9ae9 | 675 | case OVS_ACTION_ATTR_SET: |
fea393b1 | 676 | err = validate_set(a, key); |
4edb9ae9 PS |
677 | if (err) |
678 | return err; | |
23cad98c | 679 | break; |
064af421 | 680 | |
6ff686f2 | 681 | case OVS_ACTION_ATTR_SAMPLE: |
4edb9ae9 | 682 | err = validate_sample(a, key, depth); |
6ff686f2 PS |
683 | if (err) |
684 | return err; | |
685 | break; | |
686 | ||
23cad98c | 687 | default: |
4edb9ae9 | 688 | return -EINVAL; |
23cad98c BP |
689 | } |
690 | } | |
3c5f6de3 | 691 | |
23cad98c BP |
692 | if (rem > 0) |
693 | return -EINVAL; | |
064af421 | 694 | |
23cad98c | 695 | return 0; |
064af421 | 696 | } |
4edb9ae9 | 697 | |
064af421 BP |
698 | static void clear_stats(struct sw_flow *flow) |
699 | { | |
6bfafa55 | 700 | flow->used = 0; |
064af421 | 701 | flow->tcp_flags = 0; |
064af421 BP |
702 | flow->packet_count = 0; |
703 | flow->byte_count = 0; | |
704 | } | |
705 | ||
df2c07f4 | 706 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 707 | { |
df2c07f4 | 708 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 709 | struct nlattr **a = info->attrs; |
e0e57990 | 710 | struct sw_flow_actions *acts; |
982b8810 | 711 | struct sk_buff *packet; |
e0e57990 | 712 | struct sw_flow *flow; |
f7cd0081 | 713 | struct datapath *dp; |
d6569377 | 714 | struct ethhdr *eth; |
3f19d399 | 715 | int len; |
d6569377 | 716 | int err; |
76abe283 | 717 | int key_len; |
064af421 | 718 | |
f7cd0081 | 719 | err = -EINVAL; |
df2c07f4 JP |
720 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
721 | !a[OVS_PACKET_ATTR_ACTIONS] || | |
722 | nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN) | |
e5cad958 | 723 | goto err; |
064af421 | 724 | |
df2c07f4 | 725 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 726 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
727 | err = -ENOMEM; |
728 | if (!packet) | |
e5cad958 | 729 | goto err; |
3f19d399 BP |
730 | skb_reserve(packet, NET_IP_ALIGN); |
731 | ||
df2c07f4 | 732 | memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len); |
8d5ebd83 | 733 | |
f7cd0081 BP |
734 | skb_reset_mac_header(packet); |
735 | eth = eth_hdr(packet); | |
064af421 | 736 | |
d6569377 BP |
737 | /* Normally, setting the skb 'protocol' field would be handled by a |
738 | * call to eth_type_trans(), but it assumes there's a sending | |
739 | * device, which we may not have. */ | |
740 | if (ntohs(eth->h_proto) >= 1536) | |
f7cd0081 | 741 | packet->protocol = eth->h_proto; |
d6569377 | 742 | else |
f7cd0081 | 743 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 744 | |
e0e57990 BP |
745 | /* Build an sw_flow for sending this packet. */ |
746 | flow = flow_alloc(); | |
747 | err = PTR_ERR(flow); | |
748 | if (IS_ERR(flow)) | |
e5cad958 | 749 | goto err_kfree_skb; |
064af421 | 750 | |
7257b535 | 751 | err = flow_extract(packet, -1, &flow->key, &key_len); |
e0e57990 BP |
752 | if (err) |
753 | goto err_flow_put; | |
e0e57990 | 754 | |
abff858b PS |
755 | err = flow_metadata_from_nlattrs(&flow->key.phy.priority, |
756 | &flow->key.phy.in_port, | |
757 | &flow->key.phy.tun_id, | |
df2c07f4 | 758 | a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 BP |
759 | if (err) |
760 | goto err_flow_put; | |
761 | ||
4edb9ae9 PS |
762 | err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0); |
763 | if (err) | |
764 | goto err_flow_put; | |
765 | ||
3544358a | 766 | flow->hash = flow_hash(&flow->key, key_len); |
0fe255df | 767 | |
df2c07f4 | 768 | acts = flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]); |
e0e57990 BP |
769 | err = PTR_ERR(acts); |
770 | if (IS_ERR(acts)) | |
771 | goto err_flow_put; | |
772 | rcu_assign_pointer(flow->sf_acts, acts); | |
773 | ||
774 | OVS_CB(packet)->flow = flow; | |
abff858b | 775 | packet->priority = flow->key.phy.priority; |
e0e57990 | 776 | |
d6569377 | 777 | rcu_read_lock(); |
df2c07f4 | 778 | dp = get_dp(ovs_header->dp_ifindex); |
f7cd0081 | 779 | err = -ENODEV; |
e5cad958 BP |
780 | if (!dp) |
781 | goto err_unlock; | |
cc4015df | 782 | |
e9141eec | 783 | local_bh_disable(); |
a4af2475 | 784 | err = execute_actions(dp, packet); |
e9141eec | 785 | local_bh_enable(); |
d6569377 | 786 | rcu_read_unlock(); |
e0e57990 BP |
787 | |
788 | flow_put(flow); | |
e5cad958 | 789 | return err; |
064af421 | 790 | |
e5cad958 BP |
791 | err_unlock: |
792 | rcu_read_unlock(); | |
e0e57990 BP |
793 | err_flow_put: |
794 | flow_put(flow); | |
e5cad958 BP |
795 | err_kfree_skb: |
796 | kfree_skb(packet); | |
797 | err: | |
d6569377 | 798 | return err; |
064af421 BP |
799 | } |
800 | ||
df2c07f4 JP |
801 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
802 | [OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC }, | |
803 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, | |
804 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
805 | }; |
806 | ||
807 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 808 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
809 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
810 | .policy = packet_policy, | |
df2c07f4 | 811 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
812 | } |
813 | }; | |
814 | ||
df2c07f4 | 815 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) |
064af421 | 816 | { |
d6569377 | 817 | int i; |
20d035b2 | 818 | struct flow_table *table = genl_dereference(dp->table); |
f180c2e2 | 819 | |
3544358a | 820 | stats->n_flows = flow_tbl_count(table); |
064af421 | 821 | |
7257b535 | 822 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
d6569377 BP |
823 | for_each_possible_cpu(i) { |
824 | const struct dp_stats_percpu *percpu_stats; | |
825 | struct dp_stats_percpu local_stats; | |
821cb9fa | 826 | unsigned int start; |
44e05eca | 827 | |
d6569377 | 828 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 829 | |
d6569377 | 830 | do { |
821cb9fa | 831 | start = u64_stats_fetch_begin_bh(&percpu_stats->sync); |
d6569377 | 832 | local_stats = *percpu_stats; |
821cb9fa | 833 | } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); |
064af421 | 834 | |
d6569377 BP |
835 | stats->n_hit += local_stats.n_hit; |
836 | stats->n_missed += local_stats.n_missed; | |
837 | stats->n_lost += local_stats.n_lost; | |
838 | } | |
839 | } | |
064af421 | 840 | |
df2c07f4 JP |
841 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
842 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
843 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
844 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 845 | }; |
36956a7d | 846 | |
37a1300c BP |
847 | static struct genl_family dp_flow_genl_family = { |
848 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
849 | .hdrsize = sizeof(struct ovs_header), |
850 | .name = OVS_FLOW_FAMILY, | |
69685a88 | 851 | .version = OVS_FLOW_VERSION, |
df2c07f4 | 852 | .maxattr = OVS_FLOW_ATTR_MAX |
37a1300c | 853 | }; |
ed099e92 | 854 | |
37a1300c | 855 | static struct genl_multicast_group dp_flow_multicast_group = { |
df2c07f4 | 856 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
857 | }; |
858 | ||
859 | /* Called with genl_lock. */ | |
df2c07f4 | 860 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
6455100f PS |
861 | struct sk_buff *skb, u32 pid, |
862 | u32 seq, u32 flags, u8 cmd) | |
d6569377 | 863 | { |
37a1300c | 864 | const int skb_orig_len = skb->len; |
d6569377 | 865 | const struct sw_flow_actions *sf_acts; |
df2c07f4 JP |
866 | struct ovs_flow_stats stats; |
867 | struct ovs_header *ovs_header; | |
d6569377 BP |
868 | struct nlattr *nla; |
869 | unsigned long used; | |
870 | u8 tcp_flags; | |
871 | int err; | |
064af421 | 872 | |
d6569377 | 873 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 874 | lockdep_genl_is_held()); |
064af421 | 875 | |
df2c07f4 JP |
876 | ovs_header = genlmsg_put(skb, pid, seq, &dp_flow_genl_family, flags, cmd); |
877 | if (!ovs_header) | |
37a1300c | 878 | return -EMSGSIZE; |
d6569377 | 879 | |
99769a40 | 880 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 881 | |
df2c07f4 | 882 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
883 | if (!nla) |
884 | goto nla_put_failure; | |
885 | err = flow_to_nlattrs(&flow->key, skb); | |
886 | if (err) | |
37a1300c | 887 | goto error; |
d6569377 BP |
888 | nla_nest_end(skb, nla); |
889 | ||
890 | spin_lock_bh(&flow->lock); | |
891 | used = flow->used; | |
892 | stats.n_packets = flow->packet_count; | |
893 | stats.n_bytes = flow->byte_count; | |
894 | tcp_flags = flow->tcp_flags; | |
895 | spin_unlock_bh(&flow->lock); | |
896 | ||
897 | if (used) | |
df2c07f4 | 898 | NLA_PUT_U64(skb, OVS_FLOW_ATTR_USED, flow_used_time(used)); |
d6569377 BP |
899 | |
900 | if (stats.n_packets) | |
6455100f PS |
901 | NLA_PUT(skb, OVS_FLOW_ATTR_STATS, |
902 | sizeof(struct ovs_flow_stats), &stats); | |
d6569377 BP |
903 | |
904 | if (tcp_flags) | |
df2c07f4 | 905 | NLA_PUT_U8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags); |
d6569377 | 906 | |
df2c07f4 | 907 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
908 | * this is the first flow to be dumped into 'skb'. This is unusual for |
909 | * Netlink but individual action lists can be longer than | |
910 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
911 | * The userspace caller can always fetch the actions separately if it | |
912 | * really wants them. (Most userspace callers in fact don't care.) | |
913 | * | |
914 | * This can only fail for dump operations because the skb is always | |
915 | * properly sized for single flows. | |
916 | */ | |
df2c07f4 | 917 | err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len, |
30053024 BP |
918 | sf_acts->actions); |
919 | if (err < 0 && skb_orig_len) | |
920 | goto error; | |
37a1300c | 921 | |
df2c07f4 | 922 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
923 | |
924 | nla_put_failure: | |
925 | err = -EMSGSIZE; | |
37a1300c | 926 | error: |
df2c07f4 | 927 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 928 | return err; |
44e05eca BP |
929 | } |
930 | ||
df2c07f4 | 931 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) |
44e05eca | 932 | { |
37a1300c BP |
933 | const struct sw_flow_actions *sf_acts; |
934 | int len; | |
d6569377 | 935 | |
37a1300c BP |
936 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
937 | lockdep_genl_is_held()); | |
d6569377 | 938 | |
6455100f PS |
939 | /* OVS_FLOW_ATTR_KEY */ |
940 | len = nla_total_size(FLOW_BUFSIZE); | |
941 | /* OVS_FLOW_ATTR_ACTIONS */ | |
942 | len += nla_total_size(sf_acts->actions_len); | |
943 | /* OVS_FLOW_ATTR_STATS */ | |
944 | len += nla_total_size(sizeof(struct ovs_flow_stats)); | |
945 | /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
946 | len += nla_total_size(1); | |
947 | /* OVS_FLOW_ATTR_USED */ | |
948 | len += nla_total_size(8); | |
949 | ||
950 | len += NLMSG_ALIGN(sizeof(struct ovs_header)); | |
951 | ||
952 | return genlmsg_new(len, GFP_KERNEL); | |
37a1300c | 953 | } |
8d5ebd83 | 954 | |
6455100f PS |
955 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, |
956 | struct datapath *dp, | |
37a1300c BP |
957 | u32 pid, u32 seq, u8 cmd) |
958 | { | |
959 | struct sk_buff *skb; | |
960 | int retval; | |
d6569377 | 961 | |
df2c07f4 | 962 | skb = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
963 | if (!skb) |
964 | return ERR_PTR(-ENOMEM); | |
d6569377 | 965 | |
df2c07f4 | 966 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, pid, seq, 0, cmd); |
37a1300c | 967 | BUG_ON(retval < 0); |
d6569377 | 968 | return skb; |
064af421 BP |
969 | } |
970 | ||
df2c07f4 | 971 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 972 | { |
37a1300c | 973 | struct nlattr **a = info->attrs; |
df2c07f4 | 974 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 975 | struct sw_flow_key key; |
d6569377 | 976 | struct sw_flow *flow; |
37a1300c | 977 | struct sk_buff *reply; |
9c52546b | 978 | struct datapath *dp; |
3544358a | 979 | struct flow_table *table; |
bc4a05c6 | 980 | int error; |
76abe283 | 981 | int key_len; |
064af421 | 982 | |
37a1300c BP |
983 | /* Extract key. */ |
984 | error = -EINVAL; | |
df2c07f4 | 985 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 986 | goto error; |
df2c07f4 | 987 | error = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
988 | if (error) |
989 | goto error; | |
064af421 | 990 | |
37a1300c | 991 | /* Validate actions. */ |
df2c07f4 | 992 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
4edb9ae9 | 993 | error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0); |
37a1300c BP |
994 | if (error) |
995 | goto error; | |
df2c07f4 | 996 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
997 | error = -EINVAL; |
998 | goto error; | |
999 | } | |
1000 | ||
df2c07f4 | 1001 | dp = get_dp(ovs_header->dp_ifindex); |
d6569377 | 1002 | error = -ENODEV; |
9c52546b | 1003 | if (!dp) |
37a1300c | 1004 | goto error; |
704a1e09 | 1005 | |
20d035b2 | 1006 | table = genl_dereference(dp->table); |
3544358a PS |
1007 | flow = flow_tbl_lookup(table, &key, key_len); |
1008 | if (!flow) { | |
d6569377 BP |
1009 | struct sw_flow_actions *acts; |
1010 | ||
1011 | /* Bail out if we're not allowed to create a new flow. */ | |
1012 | error = -ENOENT; | |
df2c07f4 | 1013 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
37a1300c | 1014 | goto error; |
d6569377 BP |
1015 | |
1016 | /* Expand table, if necessary, to make room. */ | |
3544358a PS |
1017 | if (flow_tbl_need_to_expand(table)) { |
1018 | struct flow_table *new_table; | |
1019 | ||
1020 | new_table = flow_tbl_expand(table); | |
1021 | if (!IS_ERR(new_table)) { | |
1022 | rcu_assign_pointer(dp->table, new_table); | |
1023 | flow_tbl_deferred_destroy(table); | |
20d035b2 | 1024 | table = genl_dereference(dp->table); |
3544358a | 1025 | } |
d6569377 BP |
1026 | } |
1027 | ||
1028 | /* Allocate flow. */ | |
1029 | flow = flow_alloc(); | |
1030 | if (IS_ERR(flow)) { | |
1031 | error = PTR_ERR(flow); | |
37a1300c | 1032 | goto error; |
d6569377 | 1033 | } |
37a1300c | 1034 | flow->key = key; |
d6569377 BP |
1035 | clear_stats(flow); |
1036 | ||
1037 | /* Obtain actions. */ | |
df2c07f4 | 1038 | acts = flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]); |
d6569377 BP |
1039 | error = PTR_ERR(acts); |
1040 | if (IS_ERR(acts)) | |
1041 | goto error_free_flow; | |
1042 | rcu_assign_pointer(flow->sf_acts, acts); | |
1043 | ||
d6569377 | 1044 | /* Put flow in bucket. */ |
3544358a PS |
1045 | flow->hash = flow_hash(&key, key_len); |
1046 | flow_tbl_insert(table, flow); | |
37a1300c | 1047 | |
df2c07f4 | 1048 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
6455100f PS |
1049 | info->snd_seq, |
1050 | OVS_FLOW_CMD_NEW); | |
d6569377 BP |
1051 | } else { |
1052 | /* We found a matching flow. */ | |
1053 | struct sw_flow_actions *old_acts; | |
6455100f | 1054 | struct nlattr *acts_attrs; |
d6569377 BP |
1055 | |
1056 | /* Bail out if we're not allowed to modify an existing flow. | |
1057 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1058 | * because Generic Netlink treats the latter as a dump | |
1059 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1060 | * gets fixed. | |
1061 | */ | |
1062 | error = -EEXIST; | |
df2c07f4 | 1063 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c BP |
1064 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
1065 | goto error; | |
d6569377 BP |
1066 | |
1067 | /* Update actions. */ | |
d6569377 | 1068 | old_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 1069 | lockdep_genl_is_held()); |
6455100f PS |
1070 | acts_attrs = a[OVS_FLOW_ATTR_ACTIONS]; |
1071 | if (acts_attrs && | |
1072 | (old_acts->actions_len != nla_len(acts_attrs) || | |
1073 | memcmp(old_acts->actions, nla_data(acts_attrs), | |
1074 | old_acts->actions_len))) { | |
d6569377 BP |
1075 | struct sw_flow_actions *new_acts; |
1076 | ||
6455100f | 1077 | new_acts = flow_actions_alloc(acts_attrs); |
d6569377 BP |
1078 | error = PTR_ERR(new_acts); |
1079 | if (IS_ERR(new_acts)) | |
37a1300c | 1080 | goto error; |
d6569377 BP |
1081 | |
1082 | rcu_assign_pointer(flow->sf_acts, new_acts); | |
1083 | flow_deferred_free_acts(old_acts); | |
1084 | } | |
1085 | ||
df2c07f4 | 1086 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
6455100f | 1087 | info->snd_seq, OVS_FLOW_CMD_NEW); |
d6569377 BP |
1088 | |
1089 | /* Clear stats. */ | |
df2c07f4 | 1090 | if (a[OVS_FLOW_ATTR_CLEAR]) { |
d6569377 BP |
1091 | spin_lock_bh(&flow->lock); |
1092 | clear_stats(flow); | |
1093 | spin_unlock_bh(&flow->lock); | |
1094 | } | |
9c52546b | 1095 | } |
37a1300c BP |
1096 | |
1097 | if (!IS_ERR(reply)) | |
1098 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
6455100f | 1099 | dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); |
37a1300c BP |
1100 | else |
1101 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1102 | dp_flow_multicast_group.id, PTR_ERR(reply)); | |
d6569377 | 1103 | return 0; |
704a1e09 | 1104 | |
d6569377 BP |
1105 | error_free_flow: |
1106 | flow_put(flow); | |
37a1300c | 1107 | error: |
9c52546b | 1108 | return error; |
704a1e09 BP |
1109 | } |
1110 | ||
df2c07f4 | 1111 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1112 | { |
37a1300c | 1113 | struct nlattr **a = info->attrs; |
df2c07f4 | 1114 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1115 | struct sw_flow_key key; |
37a1300c | 1116 | struct sk_buff *reply; |
704a1e09 | 1117 | struct sw_flow *flow; |
9c52546b | 1118 | struct datapath *dp; |
3544358a | 1119 | struct flow_table *table; |
9c52546b | 1120 | int err; |
76abe283 | 1121 | int key_len; |
704a1e09 | 1122 | |
df2c07f4 | 1123 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1124 | return -EINVAL; |
df2c07f4 | 1125 | err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1126 | if (err) |
1127 | return err; | |
704a1e09 | 1128 | |
df2c07f4 | 1129 | dp = get_dp(ovs_header->dp_ifindex); |
9c52546b | 1130 | if (!dp) |
ed099e92 | 1131 | return -ENODEV; |
704a1e09 | 1132 | |
20d035b2 | 1133 | table = genl_dereference(dp->table); |
3544358a PS |
1134 | flow = flow_tbl_lookup(table, &key, key_len); |
1135 | if (!flow) | |
ed099e92 | 1136 | return -ENOENT; |
d6569377 | 1137 | |
6455100f PS |
1138 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
1139 | info->snd_seq, OVS_FLOW_CMD_NEW); | |
37a1300c BP |
1140 | if (IS_ERR(reply)) |
1141 | return PTR_ERR(reply); | |
36956a7d | 1142 | |
37a1300c | 1143 | return genlmsg_reply(reply, info); |
d6569377 | 1144 | } |
9c52546b | 1145 | |
df2c07f4 | 1146 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1147 | { |
37a1300c | 1148 | struct nlattr **a = info->attrs; |
df2c07f4 | 1149 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1150 | struct sw_flow_key key; |
37a1300c | 1151 | struct sk_buff *reply; |
d6569377 | 1152 | struct sw_flow *flow; |
d6569377 | 1153 | struct datapath *dp; |
3544358a | 1154 | struct flow_table *table; |
d6569377 | 1155 | int err; |
76abe283 | 1156 | int key_len; |
36956a7d | 1157 | |
df2c07f4 JP |
1158 | if (!a[OVS_FLOW_ATTR_KEY]) |
1159 | return flush_flows(ovs_header->dp_ifindex); | |
1160 | err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); | |
37a1300c BP |
1161 | if (err) |
1162 | return err; | |
d6569377 | 1163 | |
df2c07f4 | 1164 | dp = get_dp(ovs_header->dp_ifindex); |
d6569377 | 1165 | if (!dp) |
6455100f | 1166 | return -ENODEV; |
d6569377 | 1167 | |
20d035b2 | 1168 | table = genl_dereference(dp->table); |
3544358a PS |
1169 | flow = flow_tbl_lookup(table, &key, key_len); |
1170 | if (!flow) | |
37a1300c | 1171 | return -ENOENT; |
d6569377 | 1172 | |
df2c07f4 | 1173 | reply = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1174 | if (!reply) |
1175 | return -ENOMEM; | |
1176 | ||
3544358a | 1177 | flow_tbl_remove(table, flow); |
37a1300c | 1178 | |
df2c07f4 JP |
1179 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_pid, |
1180 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); | |
37a1300c BP |
1181 | BUG_ON(err < 0); |
1182 | ||
1183 | flow_deferred_free(flow); | |
1184 | ||
1185 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1186 | dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1187 | return 0; | |
1188 | } | |
1189 | ||
df2c07f4 | 1190 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1191 | { |
df2c07f4 | 1192 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
37a1300c | 1193 | struct datapath *dp; |
20d035b2 | 1194 | struct flow_table *table; |
37a1300c | 1195 | |
df2c07f4 | 1196 | dp = get_dp(ovs_header->dp_ifindex); |
37a1300c BP |
1197 | if (!dp) |
1198 | return -ENODEV; | |
1199 | ||
20d035b2 JG |
1200 | table = genl_dereference(dp->table); |
1201 | ||
37a1300c | 1202 | for (;;) { |
37a1300c BP |
1203 | struct sw_flow *flow; |
1204 | u32 bucket, obj; | |
1205 | ||
1206 | bucket = cb->args[0]; | |
1207 | obj = cb->args[1]; | |
20d035b2 | 1208 | flow = flow_tbl_next(table, &bucket, &obj); |
3544358a | 1209 | if (!flow) |
37a1300c BP |
1210 | break; |
1211 | ||
6455100f PS |
1212 | if (ovs_flow_cmd_fill_info(flow, dp, skb, |
1213 | NETLINK_CB(cb->skb).pid, | |
37a1300c | 1214 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1215 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1216 | break; |
1217 | ||
1218 | cb->args[0] = bucket; | |
1219 | cb->args[1] = obj; | |
1220 | } | |
1221 | return skb->len; | |
704a1e09 BP |
1222 | } |
1223 | ||
37a1300c | 1224 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1225 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1226 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1227 | .policy = flow_policy, | |
df2c07f4 | 1228 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1229 | }, |
df2c07f4 | 1230 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1231 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1232 | .policy = flow_policy, | |
df2c07f4 | 1233 | .doit = ovs_flow_cmd_del |
37a1300c | 1234 | }, |
df2c07f4 | 1235 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1236 | .flags = 0, /* OK for unprivileged users. */ |
1237 | .policy = flow_policy, | |
df2c07f4 JP |
1238 | .doit = ovs_flow_cmd_get, |
1239 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1240 | }, |
df2c07f4 | 1241 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1242 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1243 | .policy = flow_policy, | |
df2c07f4 | 1244 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1245 | }, |
1246 | }; | |
1247 | ||
df2c07f4 | 1248 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
aaff4b55 | 1249 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1250 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
aaff4b55 | 1251 | #endif |
b063d9f0 | 1252 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
d6569377 BP |
1253 | }; |
1254 | ||
aaff4b55 BP |
1255 | static struct genl_family dp_datapath_genl_family = { |
1256 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1257 | .hdrsize = sizeof(struct ovs_header), |
1258 | .name = OVS_DATAPATH_FAMILY, | |
69685a88 | 1259 | .version = OVS_DATAPATH_VERSION, |
df2c07f4 | 1260 | .maxattr = OVS_DP_ATTR_MAX |
aaff4b55 BP |
1261 | }; |
1262 | ||
1263 | static struct genl_multicast_group dp_datapath_multicast_group = { | |
df2c07f4 | 1264 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1265 | }; |
1266 | ||
df2c07f4 | 1267 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
aaff4b55 | 1268 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1269 | { |
df2c07f4 | 1270 | struct ovs_header *ovs_header; |
e926dfe3 | 1271 | struct ovs_dp_stats dp_stats; |
064af421 BP |
1272 | int err; |
1273 | ||
df2c07f4 | 1274 | ovs_header = genlmsg_put(skb, pid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1275 | flags, cmd); |
df2c07f4 | 1276 | if (!ovs_header) |
aaff4b55 | 1277 | goto error; |
064af421 | 1278 | |
b063d9f0 | 1279 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1280 | |
d6569377 | 1281 | rcu_read_lock(); |
df2c07f4 | 1282 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, dp_name(dp)); |
d6569377 | 1283 | rcu_read_unlock(); |
064af421 | 1284 | if (err) |
d6569377 | 1285 | goto nla_put_failure; |
064af421 | 1286 | |
e926dfe3 JG |
1287 | get_dp_stats(dp, &dp_stats); |
1288 | NLA_PUT(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats); | |
d6569377 | 1289 | |
df2c07f4 | 1290 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1291 | |
1292 | nla_put_failure: | |
df2c07f4 | 1293 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1294 | error: |
1295 | return -EMSGSIZE; | |
d6569377 BP |
1296 | } |
1297 | ||
df2c07f4 | 1298 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid, |
aaff4b55 | 1299 | u32 seq, u8 cmd) |
d6569377 | 1300 | { |
d6569377 | 1301 | struct sk_buff *skb; |
aaff4b55 | 1302 | int retval; |
d6569377 | 1303 | |
aaff4b55 | 1304 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
064af421 | 1305 | if (!skb) |
d6569377 | 1306 | return ERR_PTR(-ENOMEM); |
659586ef | 1307 | |
df2c07f4 | 1308 | retval = ovs_dp_cmd_fill_info(dp, skb, pid, seq, 0, cmd); |
aaff4b55 BP |
1309 | if (retval < 0) { |
1310 | kfree_skb(skb); | |
1311 | return ERR_PTR(retval); | |
1312 | } | |
1313 | return skb; | |
1314 | } | |
9dca7bd5 | 1315 | |
df2c07f4 | 1316 | static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
aaff4b55 | 1317 | { |
df2c07f4 | 1318 | return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1); |
d6569377 BP |
1319 | } |
1320 | ||
ed099e92 | 1321 | /* Called with genl_mutex and optionally with RTNL lock also. */ |
6455100f PS |
1322 | static struct datapath *lookup_datapath(struct ovs_header *ovs_header, |
1323 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) | |
d6569377 | 1324 | { |
254f2dc8 BP |
1325 | struct datapath *dp; |
1326 | ||
df2c07f4 JP |
1327 | if (!a[OVS_DP_ATTR_NAME]) |
1328 | dp = get_dp(ovs_header->dp_ifindex); | |
254f2dc8 | 1329 | else { |
d6569377 | 1330 | struct vport *vport; |
d6569377 | 1331 | |
057dd6d2 | 1332 | rcu_read_lock(); |
df2c07f4 JP |
1333 | vport = vport_locate(nla_data(a[OVS_DP_ATTR_NAME])); |
1334 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; | |
057dd6d2 | 1335 | rcu_read_unlock(); |
d6569377 | 1336 | } |
254f2dc8 | 1337 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1338 | } |
1339 | ||
df2c07f4 | 1340 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1341 | { |
aaff4b55 | 1342 | struct nlattr **a = info->attrs; |
d6569377 | 1343 | struct vport_parms parms; |
aaff4b55 | 1344 | struct sk_buff *reply; |
d6569377 BP |
1345 | struct datapath *dp; |
1346 | struct vport *vport; | |
d6569377 | 1347 | int err; |
d6569377 | 1348 | |
d6569377 | 1349 | err = -EINVAL; |
ea36840f | 1350 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1351 | goto err; |
1352 | ||
df2c07f4 | 1353 | err = ovs_dp_cmd_validate(a); |
aaff4b55 BP |
1354 | if (err) |
1355 | goto err; | |
d6569377 BP |
1356 | |
1357 | rtnl_lock(); | |
d6569377 BP |
1358 | err = -ENODEV; |
1359 | if (!try_module_get(THIS_MODULE)) | |
ed099e92 | 1360 | goto err_unlock_rtnl; |
d6569377 | 1361 | |
d6569377 BP |
1362 | err = -ENOMEM; |
1363 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1364 | if (dp == NULL) | |
1365 | goto err_put_module; | |
1366 | INIT_LIST_HEAD(&dp->port_list); | |
d6569377 BP |
1367 | |
1368 | /* Initialize kobject for bridge. This will be added as | |
1369 | * /sys/class/net/<devname>/brif later, if sysfs is enabled. */ | |
1370 | dp->ifobj.kset = NULL; | |
1371 | kobject_init(&dp->ifobj, &dp_ktype); | |
1372 | ||
1373 | /* Allocate table. */ | |
1374 | err = -ENOMEM; | |
3544358a | 1375 | rcu_assign_pointer(dp->table, flow_tbl_alloc(TBL_MIN_BUCKETS)); |
d6569377 BP |
1376 | if (!dp->table) |
1377 | goto err_free_dp; | |
1378 | ||
99769a40 JG |
1379 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); |
1380 | if (!dp->stats_percpu) { | |
1381 | err = -ENOMEM; | |
1382 | goto err_destroy_table; | |
1383 | } | |
1384 | ||
d6569377 | 1385 | /* Set up our datapath device. */ |
df2c07f4 JP |
1386 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1387 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1388 | parms.options = NULL; |
1389 | parms.dp = dp; | |
df2c07f4 | 1390 | parms.port_no = OVSP_LOCAL; |
ea36840f | 1391 | parms.upcall_pid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
b063d9f0 | 1392 | |
d6569377 BP |
1393 | vport = new_vport(&parms); |
1394 | if (IS_ERR(vport)) { | |
1395 | err = PTR_ERR(vport); | |
1396 | if (err == -EBUSY) | |
1397 | err = -EEXIST; | |
1398 | ||
99769a40 | 1399 | goto err_destroy_percpu; |
d6569377 | 1400 | } |
d6569377 | 1401 | |
6455100f PS |
1402 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, |
1403 | info->snd_seq, OVS_DP_CMD_NEW); | |
aaff4b55 BP |
1404 | err = PTR_ERR(reply); |
1405 | if (IS_ERR(reply)) | |
1406 | goto err_destroy_local_port; | |
1407 | ||
254f2dc8 | 1408 | list_add_tail(&dp->list_node, &dps); |
d6569377 BP |
1409 | dp_sysfs_add_dp(dp); |
1410 | ||
d6569377 BP |
1411 | rtnl_unlock(); |
1412 | ||
aaff4b55 BP |
1413 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1414 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
d6569377 BP |
1415 | return 0; |
1416 | ||
1417 | err_destroy_local_port: | |
cbbf4e1e | 1418 | dp_detach_port(rtnl_dereference(dp->ports[OVSP_LOCAL])); |
99769a40 JG |
1419 | err_destroy_percpu: |
1420 | free_percpu(dp->stats_percpu); | |
d6569377 | 1421 | err_destroy_table: |
20d035b2 | 1422 | flow_tbl_destroy(genl_dereference(dp->table)); |
d6569377 | 1423 | err_free_dp: |
d6569377 BP |
1424 | kfree(dp); |
1425 | err_put_module: | |
1426 | module_put(THIS_MODULE); | |
ed099e92 | 1427 | err_unlock_rtnl: |
d6569377 | 1428 | rtnl_unlock(); |
d6569377 | 1429 | err: |
064af421 BP |
1430 | return err; |
1431 | } | |
1432 | ||
df2c07f4 | 1433 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1434 | { |
ed099e92 | 1435 | struct vport *vport, *next_vport; |
aaff4b55 | 1436 | struct sk_buff *reply; |
9c52546b | 1437 | struct datapath *dp; |
d6569377 | 1438 | int err; |
44e05eca | 1439 | |
df2c07f4 | 1440 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 | 1441 | if (err) |
d6569377 | 1442 | goto exit; |
44e05eca | 1443 | |
d6569377 | 1444 | rtnl_lock(); |
aaff4b55 | 1445 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 BP |
1446 | err = PTR_ERR(dp); |
1447 | if (IS_ERR(dp)) | |
aaff4b55 BP |
1448 | goto exit_unlock; |
1449 | ||
6455100f PS |
1450 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, |
1451 | info->snd_seq, OVS_DP_CMD_DEL); | |
aaff4b55 BP |
1452 | err = PTR_ERR(reply); |
1453 | if (IS_ERR(reply)) | |
1454 | goto exit_unlock; | |
9c52546b | 1455 | |
6455100f | 1456 | list_for_each_entry_safe(vport, next_vport, &dp->port_list, node) |
df2c07f4 | 1457 | if (vport->port_no != OVSP_LOCAL) |
ed099e92 BP |
1458 | dp_detach_port(vport); |
1459 | ||
1460 | dp_sysfs_del_dp(dp); | |
254f2dc8 | 1461 | list_del(&dp->list_node); |
cbbf4e1e | 1462 | dp_detach_port(rtnl_dereference(dp->ports[OVSP_LOCAL])); |
ed099e92 | 1463 | |
99620d2c JG |
1464 | /* rtnl_unlock() will wait until all the references to devices that |
1465 | * are pending unregistration have been dropped. We do it here to | |
1466 | * ensure that any internal devices (which contain DP pointers) are | |
1467 | * fully destroyed before freeing the datapath. | |
1468 | */ | |
1469 | rtnl_unlock(); | |
1470 | ||
ed099e92 BP |
1471 | call_rcu(&dp->rcu, destroy_dp_rcu); |
1472 | module_put(THIS_MODULE); | |
1473 | ||
aaff4b55 BP |
1474 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1475 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
99620d2c JG |
1476 | |
1477 | return 0; | |
d6569377 | 1478 | |
aaff4b55 | 1479 | exit_unlock: |
d6569377 BP |
1480 | rtnl_unlock(); |
1481 | exit: | |
1482 | return err; | |
44e05eca BP |
1483 | } |
1484 | ||
df2c07f4 | 1485 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1486 | { |
aaff4b55 | 1487 | struct sk_buff *reply; |
d6569377 | 1488 | struct datapath *dp; |
d6569377 | 1489 | int err; |
064af421 | 1490 | |
df2c07f4 | 1491 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1492 | if (err) |
1493 | return err; | |
38c6ecbc | 1494 | |
aaff4b55 | 1495 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 | 1496 | if (IS_ERR(dp)) |
aaff4b55 | 1497 | return PTR_ERR(dp); |
38c6ecbc | 1498 | |
6455100f PS |
1499 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, |
1500 | info->snd_seq, OVS_DP_CMD_NEW); | |
aaff4b55 BP |
1501 | if (IS_ERR(reply)) { |
1502 | err = PTR_ERR(reply); | |
1503 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1504 | dp_datapath_multicast_group.id, err); | |
1505 | return 0; | |
1506 | } | |
1507 | ||
1508 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1509 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1510 | return 0; | |
064af421 BP |
1511 | } |
1512 | ||
df2c07f4 | 1513 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1514 | { |
aaff4b55 | 1515 | struct sk_buff *reply; |
d6569377 | 1516 | struct datapath *dp; |
d6569377 | 1517 | int err; |
1dcf111b | 1518 | |
df2c07f4 | 1519 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1520 | if (err) |
1521 | return err; | |
1dcf111b | 1522 | |
aaff4b55 | 1523 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 | 1524 | if (IS_ERR(dp)) |
aaff4b55 | 1525 | return PTR_ERR(dp); |
1dcf111b | 1526 | |
6455100f PS |
1527 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, |
1528 | info->snd_seq, OVS_DP_CMD_NEW); | |
aaff4b55 BP |
1529 | if (IS_ERR(reply)) |
1530 | return PTR_ERR(reply); | |
1531 | ||
1532 | return genlmsg_reply(reply, info); | |
1dcf111b JP |
1533 | } |
1534 | ||
df2c07f4 | 1535 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1536 | { |
254f2dc8 BP |
1537 | struct datapath *dp; |
1538 | int skip = cb->args[0]; | |
1539 | int i = 0; | |
a7786963 | 1540 | |
6455100f | 1541 | list_for_each_entry(dp, &dps, list_node) { |
254f2dc8 | 1542 | if (i < skip) |
d6569377 | 1543 | continue; |
df2c07f4 | 1544 | if (ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid, |
aaff4b55 | 1545 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1546 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1547 | break; |
254f2dc8 | 1548 | i++; |
a7786963 | 1549 | } |
aaff4b55 | 1550 | |
254f2dc8 BP |
1551 | cb->args[0] = i; |
1552 | ||
aaff4b55 | 1553 | return skb->len; |
c19e6535 BP |
1554 | } |
1555 | ||
aaff4b55 | 1556 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1557 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1558 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1559 | .policy = datapath_policy, | |
df2c07f4 | 1560 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1561 | }, |
df2c07f4 | 1562 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1563 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1564 | .policy = datapath_policy, | |
df2c07f4 | 1565 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1566 | }, |
df2c07f4 | 1567 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1568 | .flags = 0, /* OK for unprivileged users. */ |
1569 | .policy = datapath_policy, | |
df2c07f4 JP |
1570 | .doit = ovs_dp_cmd_get, |
1571 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1572 | }, |
df2c07f4 | 1573 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1574 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1575 | .policy = datapath_policy, | |
df2c07f4 | 1576 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1577 | }, |
1578 | }; | |
1579 | ||
df2c07f4 | 1580 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
f0fef760 | 1581 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1582 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1583 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1584 | [OVS_VPORT_ATTR_ADDRESS] = { .len = ETH_ALEN }, |
f0fef760 | 1585 | #else |
f613a0d7 | 1586 | [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1587 | [OVS_VPORT_ATTR_ADDRESS] = { .minlen = ETH_ALEN }, |
f0fef760 | 1588 | #endif |
d48c88ec JG |
1589 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1590 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1591 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1592 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1593 | }; |
1594 | ||
f0fef760 BP |
1595 | static struct genl_family dp_vport_genl_family = { |
1596 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1597 | .hdrsize = sizeof(struct ovs_header), |
1598 | .name = OVS_VPORT_FAMILY, | |
69685a88 | 1599 | .version = OVS_VPORT_VERSION, |
df2c07f4 | 1600 | .maxattr = OVS_VPORT_ATTR_MAX |
f0fef760 BP |
1601 | }; |
1602 | ||
f14d8083 | 1603 | struct genl_multicast_group dp_vport_multicast_group = { |
df2c07f4 | 1604 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1605 | }; |
1606 | ||
1607 | /* Called with RTNL lock or RCU read lock. */ | |
df2c07f4 | 1608 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
f0fef760 | 1609 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1610 | { |
df2c07f4 | 1611 | struct ovs_header *ovs_header; |
e926dfe3 | 1612 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1613 | int err; |
1614 | ||
df2c07f4 | 1615 | ovs_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family, |
f0fef760 | 1616 | flags, cmd); |
df2c07f4 | 1617 | if (!ovs_header) |
f0fef760 | 1618 | return -EMSGSIZE; |
c19e6535 | 1619 | |
99769a40 | 1620 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1621 | |
df2c07f4 | 1622 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no); |
16b82e84 JG |
1623 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type); |
1624 | NLA_PUT_STRING(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)); | |
b063d9f0 | 1625 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_pid); |
c19e6535 | 1626 | |
e926dfe3 JG |
1627 | vport_get_stats(vport, &vport_stats); |
1628 | NLA_PUT(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), | |
1629 | &vport_stats); | |
c19e6535 | 1630 | |
16b82e84 JG |
1631 | NLA_PUT(skb, OVS_VPORT_ATTR_ADDRESS, ETH_ALEN, |
1632 | vport->ops->get_addr(vport)); | |
c19e6535 | 1633 | |
c19e6535 | 1634 | err = vport_get_options(vport, skb); |
f0fef760 BP |
1635 | if (err == -EMSGSIZE) |
1636 | goto error; | |
c19e6535 | 1637 | |
df2c07f4 | 1638 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1639 | |
1640 | nla_put_failure: | |
1641 | err = -EMSGSIZE; | |
f0fef760 | 1642 | error: |
df2c07f4 | 1643 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1644 | return err; |
064af421 BP |
1645 | } |
1646 | ||
f0fef760 | 1647 | /* Called with RTNL lock or RCU read lock. */ |
f14d8083 EJ |
1648 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid, |
1649 | u32 seq, u8 cmd) | |
064af421 | 1650 | { |
c19e6535 | 1651 | struct sk_buff *skb; |
f0fef760 | 1652 | int retval; |
c19e6535 | 1653 | |
f0fef760 | 1654 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1655 | if (!skb) |
1656 | return ERR_PTR(-ENOMEM); | |
1657 | ||
df2c07f4 | 1658 | retval = ovs_vport_cmd_fill_info(vport, skb, pid, seq, 0, cmd); |
f0fef760 BP |
1659 | if (retval < 0) { |
1660 | kfree_skb(skb); | |
1661 | return ERR_PTR(retval); | |
1662 | } | |
c19e6535 | 1663 | return skb; |
f0fef760 | 1664 | } |
c19e6535 | 1665 | |
df2c07f4 | 1666 | static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
f0fef760 | 1667 | { |
df2c07f4 | 1668 | return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1); |
c19e6535 | 1669 | } |
51d4d598 | 1670 | |
ed099e92 | 1671 | /* Called with RTNL lock or RCU read lock. */ |
df2c07f4 JP |
1672 | static struct vport *lookup_vport(struct ovs_header *ovs_header, |
1673 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) | |
c19e6535 BP |
1674 | { |
1675 | struct datapath *dp; | |
1676 | struct vport *vport; | |
1677 | ||
df2c07f4 JP |
1678 | if (a[OVS_VPORT_ATTR_NAME]) { |
1679 | vport = vport_locate(nla_data(a[OVS_VPORT_ATTR_NAME])); | |
ed099e92 | 1680 | if (!vport) |
c19e6535 | 1681 | return ERR_PTR(-ENODEV); |
c19e6535 | 1682 | return vport; |
df2c07f4 JP |
1683 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1684 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1685 | |
1686 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1687 | return ERR_PTR(-EFBIG); |
c19e6535 | 1688 | |
df2c07f4 | 1689 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 BP |
1690 | if (!dp) |
1691 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1692 | |
cbbf4e1e | 1693 | vport = rcu_dereference_rtnl(dp->ports[port_no]); |
ed099e92 | 1694 | if (!vport) |
c19e6535 | 1695 | return ERR_PTR(-ENOENT); |
c19e6535 BP |
1696 | return vport; |
1697 | } else | |
1698 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1699 | } |
1700 | ||
ed099e92 | 1701 | /* Called with RTNL lock. */ |
6455100f PS |
1702 | static int change_vport(struct vport *vport, |
1703 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) | |
064af421 | 1704 | { |
c19e6535 | 1705 | int err = 0; |
f613a0d7 | 1706 | |
df2c07f4 | 1707 | if (a[OVS_VPORT_ATTR_STATS]) |
f613a0d7 PS |
1708 | vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); |
1709 | ||
1710 | if (a[OVS_VPORT_ATTR_ADDRESS]) | |
df2c07f4 | 1711 | err = vport_set_addr(vport, nla_data(a[OVS_VPORT_ATTR_ADDRESS])); |
f613a0d7 | 1712 | |
c19e6535 BP |
1713 | return err; |
1714 | } | |
1715 | ||
df2c07f4 | 1716 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1717 | { |
f0fef760 | 1718 | struct nlattr **a = info->attrs; |
df2c07f4 | 1719 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1720 | struct vport_parms parms; |
ed099e92 | 1721 | struct sk_buff *reply; |
c19e6535 | 1722 | struct vport *vport; |
c19e6535 | 1723 | struct datapath *dp; |
b0ec0f27 | 1724 | u32 port_no; |
c19e6535 | 1725 | int err; |
b0ec0f27 | 1726 | |
c19e6535 | 1727 | err = -EINVAL; |
ea36840f BP |
1728 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1729 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
f0fef760 BP |
1730 | goto exit; |
1731 | ||
df2c07f4 | 1732 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1733 | if (err) |
1734 | goto exit; | |
51d4d598 | 1735 | |
c19e6535 | 1736 | rtnl_lock(); |
df2c07f4 | 1737 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 BP |
1738 | err = -ENODEV; |
1739 | if (!dp) | |
ed099e92 | 1740 | goto exit_unlock; |
c19e6535 | 1741 | |
df2c07f4 JP |
1742 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1743 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1744 | |
1745 | err = -EFBIG; | |
1746 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 1747 | goto exit_unlock; |
c19e6535 | 1748 | |
cbbf4e1e | 1749 | vport = rtnl_dereference(dp->ports[port_no]); |
c19e6535 BP |
1750 | err = -EBUSY; |
1751 | if (vport) | |
ed099e92 | 1752 | goto exit_unlock; |
c19e6535 BP |
1753 | } else { |
1754 | for (port_no = 1; ; port_no++) { | |
1755 | if (port_no >= DP_MAX_PORTS) { | |
1756 | err = -EFBIG; | |
ed099e92 | 1757 | goto exit_unlock; |
c19e6535 | 1758 | } |
cbbf4e1e | 1759 | vport = rtnl_dereference(dp->ports[port_no]); |
c19e6535 BP |
1760 | if (!vport) |
1761 | break; | |
51d4d598 | 1762 | } |
064af421 | 1763 | } |
b0ec0f27 | 1764 | |
df2c07f4 JP |
1765 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1766 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1767 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1768 | parms.dp = dp; |
1769 | parms.port_no = port_no; | |
ea36840f | 1770 | parms.upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 BP |
1771 | |
1772 | vport = new_vport(&parms); | |
1773 | err = PTR_ERR(vport); | |
1774 | if (IS_ERR(vport)) | |
ed099e92 | 1775 | goto exit_unlock; |
c19e6535 | 1776 | |
6455100f | 1777 | dp_sysfs_add_if(vport); |
c19e6535 BP |
1778 | |
1779 | err = change_vport(vport, a); | |
f0fef760 | 1780 | if (!err) { |
df2c07f4 | 1781 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, |
6455100f PS |
1782 | info->snd_seq, |
1783 | OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1784 | if (IS_ERR(reply)) |
1785 | err = PTR_ERR(reply); | |
1786 | } | |
c19e6535 BP |
1787 | if (err) { |
1788 | dp_detach_port(vport); | |
ed099e92 | 1789 | goto exit_unlock; |
c19e6535 | 1790 | } |
f0fef760 BP |
1791 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1792 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
c19e6535 | 1793 | |
c19e6535 | 1794 | |
ed099e92 | 1795 | exit_unlock: |
c19e6535 | 1796 | rtnl_unlock(); |
c19e6535 BP |
1797 | exit: |
1798 | return err; | |
44e05eca BP |
1799 | } |
1800 | ||
df2c07f4 | 1801 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1802 | { |
f0fef760 BP |
1803 | struct nlattr **a = info->attrs; |
1804 | struct sk_buff *reply; | |
c19e6535 | 1805 | struct vport *vport; |
c19e6535 | 1806 | int err; |
44e05eca | 1807 | |
df2c07f4 | 1808 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1809 | if (err) |
c19e6535 BP |
1810 | goto exit; |
1811 | ||
1812 | rtnl_lock(); | |
f0fef760 | 1813 | vport = lookup_vport(info->userhdr, a); |
c19e6535 BP |
1814 | err = PTR_ERR(vport); |
1815 | if (IS_ERR(vport)) | |
f0fef760 | 1816 | goto exit_unlock; |
44e05eca | 1817 | |
c19e6535 | 1818 | err = 0; |
6455100f | 1819 | if (a[OVS_VPORT_ATTR_TYPE] && |
16b82e84 | 1820 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) |
4879d4c7 | 1821 | err = -EINVAL; |
6455100f | 1822 | |
4879d4c7 | 1823 | if (!err && a[OVS_VPORT_ATTR_OPTIONS]) |
df2c07f4 | 1824 | err = vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
c19e6535 BP |
1825 | if (!err) |
1826 | err = change_vport(vport, a); | |
b063d9f0 JG |
1827 | if (!err && a[OVS_VPORT_ATTR_UPCALL_PID]) |
1828 | vport->upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); | |
c19e6535 | 1829 | |
df2c07f4 JP |
1830 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1831 | OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1832 | if (IS_ERR(reply)) { |
1833 | err = PTR_ERR(reply); | |
1834 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1835 | dp_vport_multicast_group.id, err); | |
1836 | return 0; | |
1837 | } | |
1838 | ||
1839 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1840 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1841 | ||
1842 | exit_unlock: | |
c19e6535 BP |
1843 | rtnl_unlock(); |
1844 | exit: | |
1845 | return err; | |
064af421 BP |
1846 | } |
1847 | ||
df2c07f4 | 1848 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1849 | { |
f0fef760 BP |
1850 | struct nlattr **a = info->attrs; |
1851 | struct sk_buff *reply; | |
c19e6535 | 1852 | struct vport *vport; |
c19e6535 BP |
1853 | int err; |
1854 | ||
df2c07f4 | 1855 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1856 | if (err) |
c19e6535 BP |
1857 | goto exit; |
1858 | ||
1859 | rtnl_lock(); | |
f0fef760 | 1860 | vport = lookup_vport(info->userhdr, a); |
c19e6535 | 1861 | err = PTR_ERR(vport); |
f0fef760 BP |
1862 | if (IS_ERR(vport)) |
1863 | goto exit_unlock; | |
c19e6535 | 1864 | |
df2c07f4 | 1865 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
1866 | err = -EINVAL; |
1867 | goto exit_unlock; | |
1868 | } | |
1869 | ||
df2c07f4 JP |
1870 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1871 | OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
1872 | err = PTR_ERR(reply); |
1873 | if (IS_ERR(reply)) | |
1874 | goto exit_unlock; | |
1875 | ||
3544358a | 1876 | dp_detach_port(vport); |
f0fef760 BP |
1877 | |
1878 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1879 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1880 | ||
1881 | exit_unlock: | |
c19e6535 BP |
1882 | rtnl_unlock(); |
1883 | exit: | |
1884 | return err; | |
7c40efc9 BP |
1885 | } |
1886 | ||
df2c07f4 | 1887 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1888 | { |
f0fef760 | 1889 | struct nlattr **a = info->attrs; |
df2c07f4 | 1890 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 1891 | struct sk_buff *reply; |
c19e6535 | 1892 | struct vport *vport; |
c19e6535 BP |
1893 | int err; |
1894 | ||
df2c07f4 | 1895 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1896 | if (err) |
1897 | goto exit; | |
c19e6535 | 1898 | |
ed099e92 | 1899 | rcu_read_lock(); |
df2c07f4 | 1900 | vport = lookup_vport(ovs_header, a); |
c19e6535 BP |
1901 | err = PTR_ERR(vport); |
1902 | if (IS_ERR(vport)) | |
f0fef760 | 1903 | goto exit_unlock; |
c19e6535 | 1904 | |
df2c07f4 JP |
1905 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1906 | OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
1907 | err = PTR_ERR(reply); |
1908 | if (IS_ERR(reply)) | |
f0fef760 | 1909 | goto exit_unlock; |
ed099e92 | 1910 | |
df2fa9b5 JG |
1911 | rcu_read_unlock(); |
1912 | ||
1913 | return genlmsg_reply(reply, info); | |
ed099e92 | 1914 | |
f0fef760 | 1915 | exit_unlock: |
ed099e92 | 1916 | rcu_read_unlock(); |
f0fef760 | 1917 | exit: |
c19e6535 BP |
1918 | return err; |
1919 | } | |
1920 | ||
df2c07f4 | 1921 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 1922 | { |
df2c07f4 | 1923 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 BP |
1924 | struct datapath *dp; |
1925 | u32 port_no; | |
f0fef760 | 1926 | int retval; |
c19e6535 | 1927 | |
df2c07f4 | 1928 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 | 1929 | if (!dp) |
f0fef760 | 1930 | return -ENODEV; |
ed099e92 BP |
1931 | |
1932 | rcu_read_lock(); | |
f0fef760 | 1933 | for (port_no = cb->args[0]; port_no < DP_MAX_PORTS; port_no++) { |
ed099e92 | 1934 | struct vport *vport; |
ed099e92 | 1935 | |
cbbf4e1e | 1936 | vport = rcu_dereference(dp->ports[port_no]); |
ed099e92 BP |
1937 | if (!vport) |
1938 | continue; | |
1939 | ||
df2c07f4 | 1940 | if (ovs_vport_cmd_fill_info(vport, skb, NETLINK_CB(cb->skb).pid, |
f0fef760 | 1941 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1942 | OVS_VPORT_CMD_NEW) < 0) |
f0fef760 | 1943 | break; |
c19e6535 | 1944 | } |
ed099e92 | 1945 | rcu_read_unlock(); |
c19e6535 | 1946 | |
f0fef760 BP |
1947 | cb->args[0] = port_no; |
1948 | retval = skb->len; | |
1949 | ||
1950 | return retval; | |
7c40efc9 BP |
1951 | } |
1952 | ||
f0fef760 | 1953 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 1954 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
1955 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1956 | .policy = vport_policy, | |
df2c07f4 | 1957 | .doit = ovs_vport_cmd_new |
f0fef760 | 1958 | }, |
df2c07f4 | 1959 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
1960 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1961 | .policy = vport_policy, | |
df2c07f4 | 1962 | .doit = ovs_vport_cmd_del |
f0fef760 | 1963 | }, |
df2c07f4 | 1964 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
1965 | .flags = 0, /* OK for unprivileged users. */ |
1966 | .policy = vport_policy, | |
df2c07f4 JP |
1967 | .doit = ovs_vport_cmd_get, |
1968 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 1969 | }, |
df2c07f4 | 1970 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
1971 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1972 | .policy = vport_policy, | |
df2c07f4 | 1973 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
1974 | }, |
1975 | }; | |
1976 | ||
982b8810 BP |
1977 | struct genl_family_and_ops { |
1978 | struct genl_family *family; | |
1979 | struct genl_ops *ops; | |
1980 | int n_ops; | |
1981 | struct genl_multicast_group *group; | |
1982 | }; | |
ed099e92 | 1983 | |
982b8810 | 1984 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
1985 | { &dp_datapath_genl_family, |
1986 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
1987 | &dp_datapath_multicast_group }, | |
f0fef760 BP |
1988 | { &dp_vport_genl_family, |
1989 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
1990 | &dp_vport_multicast_group }, | |
37a1300c BP |
1991 | { &dp_flow_genl_family, |
1992 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
1993 | &dp_flow_multicast_group }, | |
982b8810 BP |
1994 | { &dp_packet_genl_family, |
1995 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
1996 | NULL }, | |
1997 | }; | |
ed099e92 | 1998 | |
982b8810 BP |
1999 | static void dp_unregister_genl(int n_families) |
2000 | { | |
2001 | int i; | |
ed099e92 | 2002 | |
b867ca75 | 2003 | for (i = 0; i < n_families; i++) |
982b8810 | 2004 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
2005 | } |
2006 | ||
982b8810 | 2007 | static int dp_register_genl(void) |
064af421 | 2008 | { |
982b8810 BP |
2009 | int n_registered; |
2010 | int err; | |
2011 | int i; | |
064af421 | 2012 | |
982b8810 BP |
2013 | n_registered = 0; |
2014 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2015 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 2016 | |
982b8810 BP |
2017 | err = genl_register_family_with_ops(f->family, f->ops, |
2018 | f->n_ops); | |
2019 | if (err) | |
2020 | goto error; | |
2021 | n_registered++; | |
e22d4953 | 2022 | |
982b8810 BP |
2023 | if (f->group) { |
2024 | err = genl_register_mc_group(f->family, f->group); | |
2025 | if (err) | |
2026 | goto error; | |
2027 | } | |
2028 | } | |
9cc8b4e4 | 2029 | |
982b8810 | 2030 | return 0; |
064af421 BP |
2031 | |
2032 | error: | |
982b8810 BP |
2033 | dp_unregister_genl(n_registered); |
2034 | return err; | |
064af421 BP |
2035 | } |
2036 | ||
22d24ebf BP |
2037 | static int __init dp_init(void) |
2038 | { | |
f2459fe7 | 2039 | struct sk_buff *dummy_skb; |
22d24ebf BP |
2040 | int err; |
2041 | ||
f2459fe7 | 2042 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb)); |
22d24ebf | 2043 | |
dc5f3fef | 2044 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
6455100f | 2045 | VERSION BUILDNR); |
064af421 | 2046 | |
3544358a | 2047 | err = tnl_init(); |
064af421 BP |
2048 | if (err) |
2049 | goto error; | |
2050 | ||
3544358a PS |
2051 | err = flow_init(); |
2052 | if (err) | |
2053 | goto error_tnl_exit; | |
2054 | ||
f2459fe7 | 2055 | err = vport_init(); |
064af421 BP |
2056 | if (err) |
2057 | goto error_flow_exit; | |
2058 | ||
f2459fe7 JG |
2059 | err = register_netdevice_notifier(&dp_device_notifier); |
2060 | if (err) | |
2061 | goto error_vport_exit; | |
2062 | ||
982b8810 BP |
2063 | err = dp_register_genl(); |
2064 | if (err < 0) | |
37a1300c | 2065 | goto error_unreg_notifier; |
982b8810 | 2066 | |
064af421 BP |
2067 | return 0; |
2068 | ||
2069 | error_unreg_notifier: | |
2070 | unregister_netdevice_notifier(&dp_device_notifier); | |
f2459fe7 JG |
2071 | error_vport_exit: |
2072 | vport_exit(); | |
064af421 BP |
2073 | error_flow_exit: |
2074 | flow_exit(); | |
3544358a PS |
2075 | error_tnl_exit: |
2076 | tnl_exit(); | |
064af421 BP |
2077 | error: |
2078 | return err; | |
2079 | } | |
2080 | ||
2081 | static void dp_cleanup(void) | |
2082 | { | |
2083 | rcu_barrier(); | |
982b8810 | 2084 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
064af421 | 2085 | unregister_netdevice_notifier(&dp_device_notifier); |
f2459fe7 | 2086 | vport_exit(); |
064af421 | 2087 | flow_exit(); |
3544358a | 2088 | tnl_exit(); |
064af421 BP |
2089 | } |
2090 | ||
2091 | module_init(dp_init); | |
2092 | module_exit(dp_cleanup); | |
2093 | ||
2094 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2095 | MODULE_LICENSE("GPL"); |