blob: 5da2534b140ad1bb57124d8787ef7b3a79d17ef6 [file] [log] [blame]
Jesse Grossccb13522011-10-25 19:26:31 -07001/*
Andy Zhou03f0d912013-08-07 20:01:00 -07002 * Copyright (c) 2007-2013 Nicira, Inc.
Jesse Grossccb13522011-10-25 19:26:31 -07003 *
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
17 */
18
19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
21#include <linux/init.h>
22#include <linux/module.h>
23#include <linux/if_arp.h>
24#include <linux/if_vlan.h>
25#include <linux/in.h>
26#include <linux/ip.h>
27#include <linux/jhash.h>
28#include <linux/delay.h>
29#include <linux/time.h>
30#include <linux/etherdevice.h>
31#include <linux/genetlink.h>
32#include <linux/kernel.h>
33#include <linux/kthread.h>
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>
Jesse Grossccb13522011-10-25 19:26:31 -070039#include <linux/ethtool.h>
40#include <linux/wait.h>
Jesse Grossccb13522011-10-25 19:26:31 -070041#include <asm/div64.h>
42#include <linux/highmem.h>
43#include <linux/netfilter_bridge.h>
44#include <linux/netfilter_ipv4.h>
45#include <linux/inetdevice.h>
46#include <linux/list.h>
Pravin B Shelar8e4e1712013-04-15 13:23:03 -070047#include <linux/lockdep.h>
Jesse Grossccb13522011-10-25 19:26:31 -070048#include <linux/openvswitch.h>
49#include <linux/rculist.h>
50#include <linux/dmi.h>
51#include <linux/workqueue.h>
52#include <net/genetlink.h>
Pravin B Shelar46df7b82012-02-22 19:58:59 -080053#include <net/net_namespace.h>
54#include <net/netns/generic.h>
Jesse Grossccb13522011-10-25 19:26:31 -070055
56#include "datapath.h"
57#include "flow.h"
Pravin B Shelare6445712013-10-03 18:16:47 -070058#include "flow_netlink.h"
Jesse Grossccb13522011-10-25 19:26:31 -070059#include "vport-internal_dev.h"
Thomas Grafcff63a52013-04-29 13:06:41 +000060#include "vport-netdev.h"
Jesse Grossccb13522011-10-25 19:26:31 -070061
Pravin B Shelar8e4e1712013-04-15 13:23:03 -070062int ovs_net_id __read_mostly;
63
Johannes Berg68eb5502013-11-19 15:19:38 +010064static void ovs_notify(struct genl_family *family,
Johannes Berg2a94fe42013-11-19 15:19:39 +010065 struct sk_buff *skb, struct genl_info *info)
Thomas Grafed6611852013-03-29 14:46:50 +010066{
Johannes Berg68eb5502013-11-19 15:19:38 +010067 genl_notify(family, skb, genl_info_net(info), info->snd_portid,
Johannes Berg2a94fe42013-11-19 15:19:39 +010068 0, info->nlhdr, GFP_KERNEL);
Thomas Grafed6611852013-03-29 14:46:50 +010069}
70
Pravin B Shelar46df7b82012-02-22 19:58:59 -080071/**
Jesse Grossccb13522011-10-25 19:26:31 -070072 * DOC: Locking:
73 *
Pravin B Shelar8e4e1712013-04-15 13:23:03 -070074 * All writes e.g. Writes to device state (add/remove datapath, port, set
75 * operations on vports, etc.), Writes to other state (flow table
76 * modifications, set miscellaneous datapath parameters, etc.) are protected
77 * by ovs_lock.
Jesse Grossccb13522011-10-25 19:26:31 -070078 *
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.
Pravin B Shelar8e4e1712013-04-15 13:23:03 -070084 *
85 * The RTNL lock nests inside ovs_mutex.
Jesse Grossccb13522011-10-25 19:26:31 -070086 */
87
Pravin B Shelar8e4e1712013-04-15 13:23:03 -070088static DEFINE_MUTEX(ovs_mutex);
89
90void ovs_lock(void)
91{
92 mutex_lock(&ovs_mutex);
93}
94
95void ovs_unlock(void)
96{
97 mutex_unlock(&ovs_mutex);
98}
99
100#ifdef CONFIG_LOCKDEP
101int lockdep_ovsl_is_held(void)
102{
103 if (debug_locks)
104 return lockdep_is_held(&ovs_mutex);
105 else
106 return 1;
107}
108#endif
109
Jesse Grossccb13522011-10-25 19:26:31 -0700110static struct vport *new_vport(const struct vport_parms *);
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800111static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *,
Jesse Grossccb13522011-10-25 19:26:31 -0700112 const struct dp_upcall_info *);
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800113static int queue_userspace_packet(struct net *, int dp_ifindex,
114 struct sk_buff *,
Jesse Grossccb13522011-10-25 19:26:31 -0700115 const struct dp_upcall_info *);
116
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700117/* Must be called with rcu_read_lock or ovs_mutex. */
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800118static struct datapath *get_dp(struct net *net, int dp_ifindex)
Jesse Grossccb13522011-10-25 19:26:31 -0700119{
120 struct datapath *dp = NULL;
121 struct net_device *dev;
122
123 rcu_read_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800124 dev = dev_get_by_index_rcu(net, dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -0700125 if (dev) {
126 struct vport *vport = ovs_internal_dev_get_vport(dev);
127 if (vport)
128 dp = vport->dp;
129 }
130 rcu_read_unlock();
131
132 return dp;
133}
134
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700135/* Must be called with rcu_read_lock or ovs_mutex. */
Jesse Grossccb13522011-10-25 19:26:31 -0700136const char *ovs_dp_name(const struct datapath *dp)
137{
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700138 struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
Jesse Grossccb13522011-10-25 19:26:31 -0700139 return vport->ops->get_name(vport);
140}
141
142static int get_dpifindex(struct datapath *dp)
143{
144 struct vport *local;
145 int ifindex;
146
147 rcu_read_lock();
148
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700149 local = ovs_vport_rcu(dp, OVSP_LOCAL);
Jesse Grossccb13522011-10-25 19:26:31 -0700150 if (local)
Thomas Grafcff63a52013-04-29 13:06:41 +0000151 ifindex = netdev_vport_priv(local)->dev->ifindex;
Jesse Grossccb13522011-10-25 19:26:31 -0700152 else
153 ifindex = 0;
154
155 rcu_read_unlock();
156
157 return ifindex;
158}
159
160static void destroy_dp_rcu(struct rcu_head *rcu)
161{
162 struct datapath *dp = container_of(rcu, struct datapath, rcu);
163
Pravin B Shelar618ed0c2013-10-04 00:17:42 -0700164 ovs_flow_tbl_destroy(&dp->table);
Jesse Grossccb13522011-10-25 19:26:31 -0700165 free_percpu(dp->stats_percpu);
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800166 release_net(ovs_dp_get_net(dp));
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700167 kfree(dp->ports);
Jesse Grossccb13522011-10-25 19:26:31 -0700168 kfree(dp);
169}
170
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700171static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
172 u16 port_no)
173{
174 return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
175}
176
177struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
178{
179 struct vport *vport;
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700180 struct hlist_head *head;
181
182 head = vport_hash_bucket(dp, port_no);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800183 hlist_for_each_entry_rcu(vport, head, dp_hash_node) {
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700184 if (vport->port_no == port_no)
185 return vport;
186 }
187 return NULL;
188}
189
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700190/* Called with ovs_mutex. */
Jesse Grossccb13522011-10-25 19:26:31 -0700191static struct vport *new_vport(const struct vport_parms *parms)
192{
193 struct vport *vport;
194
195 vport = ovs_vport_add(parms);
196 if (!IS_ERR(vport)) {
197 struct datapath *dp = parms->dp;
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700198 struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
Jesse Grossccb13522011-10-25 19:26:31 -0700199
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700200 hlist_add_head_rcu(&vport->dp_hash_node, head);
Jesse Grossccb13522011-10-25 19:26:31 -0700201 }
Jesse Grossccb13522011-10-25 19:26:31 -0700202 return vport;
203}
204
Jesse Grossccb13522011-10-25 19:26:31 -0700205void ovs_dp_detach_port(struct vport *p)
206{
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700207 ASSERT_OVSL();
Jesse Grossccb13522011-10-25 19:26:31 -0700208
209 /* First drop references to device. */
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700210 hlist_del_rcu(&p->dp_hash_node);
Jesse Grossccb13522011-10-25 19:26:31 -0700211
212 /* Then destroy it. */
213 ovs_vport_del(p);
214}
215
216/* Must be called with rcu_read_lock. */
217void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb)
218{
219 struct datapath *dp = p->dp;
220 struct sw_flow *flow;
221 struct dp_stats_percpu *stats;
222 struct sw_flow_key key;
223 u64 *stats_counter;
Andy Zhou1bd71162013-10-22 10:42:46 -0700224 u32 n_mask_hit;
Jesse Grossccb13522011-10-25 19:26:31 -0700225 int error;
Jesse Grossccb13522011-10-25 19:26:31 -0700226
Shan Wei404f2f12012-11-13 09:52:25 +0800227 stats = this_cpu_ptr(dp->stats_percpu);
Jesse Grossccb13522011-10-25 19:26:31 -0700228
229 /* Extract flow from 'skb' into 'key'. */
Andy Zhou03f0d912013-08-07 20:01:00 -0700230 error = ovs_flow_extract(skb, p->port_no, &key);
Jesse Grossccb13522011-10-25 19:26:31 -0700231 if (unlikely(error)) {
232 kfree_skb(skb);
233 return;
234 }
235
236 /* Look up flow. */
Andy Zhou5bb50632013-11-25 10:42:46 -0800237 flow = ovs_flow_tbl_lookup_stats(&dp->table, &key, &n_mask_hit);
Jesse Grossccb13522011-10-25 19:26:31 -0700238 if (unlikely(!flow)) {
239 struct dp_upcall_info upcall;
240
241 upcall.cmd = OVS_PACKET_CMD_MISS;
242 upcall.key = &key;
243 upcall.userdata = NULL;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000244 upcall.portid = p->upcall_portid;
Jesse Grossccb13522011-10-25 19:26:31 -0700245 ovs_dp_upcall(dp, skb, &upcall);
246 consume_skb(skb);
247 stats_counter = &stats->n_missed;
248 goto out;
249 }
250
251 OVS_CB(skb)->flow = flow;
Andy Zhou03f0d912013-08-07 20:01:00 -0700252 OVS_CB(skb)->pkt_key = &key;
Jesse Grossccb13522011-10-25 19:26:31 -0700253
254 stats_counter = &stats->n_hit;
255 ovs_flow_used(OVS_CB(skb)->flow, skb);
256 ovs_execute_actions(dp, skb);
257
258out:
259 /* Update datapath statistics. */
260 u64_stats_update_begin(&stats->sync);
261 (*stats_counter)++;
Andy Zhou1bd71162013-10-22 10:42:46 -0700262 stats->n_mask_hit += n_mask_hit;
Jesse Grossccb13522011-10-25 19:26:31 -0700263 u64_stats_update_end(&stats->sync);
264}
265
266static struct genl_family dp_packet_genl_family = {
267 .id = GENL_ID_GENERATE,
268 .hdrsize = sizeof(struct ovs_header),
269 .name = OVS_PACKET_FAMILY,
270 .version = OVS_PACKET_VERSION,
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800271 .maxattr = OVS_PACKET_ATTR_MAX,
Pravin B Shelar3a4e0d62013-04-23 07:48:48 +0000272 .netnsok = true,
273 .parallel_ops = true,
Jesse Grossccb13522011-10-25 19:26:31 -0700274};
275
276int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800277 const struct dp_upcall_info *upcall_info)
Jesse Grossccb13522011-10-25 19:26:31 -0700278{
279 struct dp_stats_percpu *stats;
280 int dp_ifindex;
281 int err;
282
Eric W. Biederman15e47302012-09-07 20:12:54 +0000283 if (upcall_info->portid == 0) {
Jesse Grossccb13522011-10-25 19:26:31 -0700284 err = -ENOTCONN;
285 goto err;
286 }
287
288 dp_ifindex = get_dpifindex(dp);
289 if (!dp_ifindex) {
290 err = -ENODEV;
291 goto err;
292 }
293
294 if (!skb_is_gso(skb))
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800295 err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info);
Jesse Grossccb13522011-10-25 19:26:31 -0700296 else
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800297 err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info);
Jesse Grossccb13522011-10-25 19:26:31 -0700298 if (err)
299 goto err;
300
301 return 0;
302
303err:
Shan Wei404f2f12012-11-13 09:52:25 +0800304 stats = this_cpu_ptr(dp->stats_percpu);
Jesse Grossccb13522011-10-25 19:26:31 -0700305
306 u64_stats_update_begin(&stats->sync);
307 stats->n_lost++;
308 u64_stats_update_end(&stats->sync);
309
310 return err;
311}
312
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800313static int queue_gso_packets(struct net *net, int dp_ifindex,
314 struct sk_buff *skb,
Jesse Grossccb13522011-10-25 19:26:31 -0700315 const struct dp_upcall_info *upcall_info)
316{
Ben Pfaffa1b5d0d2012-07-20 14:47:54 -0700317 unsigned short gso_type = skb_shinfo(skb)->gso_type;
Jesse Grossccb13522011-10-25 19:26:31 -0700318 struct dp_upcall_info later_info;
319 struct sw_flow_key later_key;
320 struct sk_buff *segs, *nskb;
321 int err;
322
Cong Wang12b00042013-02-05 16:36:38 +0000323 segs = __skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM, false);
Pravin B Shelar92e5dfc2012-07-20 14:46:29 -0700324 if (IS_ERR(segs))
325 return PTR_ERR(segs);
Jesse Grossccb13522011-10-25 19:26:31 -0700326
327 /* Queue all of the segments. */
328 skb = segs;
329 do {
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800330 err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info);
Jesse Grossccb13522011-10-25 19:26:31 -0700331 if (err)
332 break;
333
Ben Pfaffa1b5d0d2012-07-20 14:47:54 -0700334 if (skb == segs && gso_type & SKB_GSO_UDP) {
Jesse Grossccb13522011-10-25 19:26:31 -0700335 /* The initial flow key extracted by ovs_flow_extract()
336 * in this case is for a first fragment, so we need to
337 * properly mark later fragments.
338 */
339 later_key = *upcall_info->key;
340 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
341
342 later_info = *upcall_info;
343 later_info.key = &later_key;
344 upcall_info = &later_info;
345 }
346 } while ((skb = skb->next));
347
348 /* Free all of the segments. */
349 skb = segs;
350 do {
351 nskb = skb->next;
352 if (err)
353 kfree_skb(skb);
354 else
355 consume_skb(skb);
356 } while ((skb = nskb));
357 return err;
358}
359
Thomas Grafc3ff8cf2013-03-29 14:46:49 +0100360static size_t key_attr_size(void)
361{
362 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
Pravin B Shelar7d5437c2013-06-17 17:50:18 -0700363 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
364 + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
365 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */
366 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */
367 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
368 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
369 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
370 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
Thomas Grafc3ff8cf2013-03-29 14:46:49 +0100371 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
372 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
373 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
374 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
375 + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */
376 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
377 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
378 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
379 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
380 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
381}
382
383static size_t upcall_msg_size(const struct sk_buff *skb,
384 const struct nlattr *userdata)
385{
386 size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
387 + nla_total_size(skb->len) /* OVS_PACKET_ATTR_PACKET */
388 + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */
389
390 /* OVS_PACKET_ATTR_USERDATA */
391 if (userdata)
392 size += NLA_ALIGN(userdata->nla_len);
393
394 return size;
395}
396
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800397static int queue_userspace_packet(struct net *net, int dp_ifindex,
398 struct sk_buff *skb,
Jesse Grossccb13522011-10-25 19:26:31 -0700399 const struct dp_upcall_info *upcall_info)
400{
401 struct ovs_header *upcall;
402 struct sk_buff *nskb = NULL;
403 struct sk_buff *user_skb; /* to be queued to userspace */
404 struct nlattr *nla;
Thomas Graf795449d2013-11-30 13:21:32 +0100405 struct genl_info info = {
406 .dst_sk = net->genl_sock,
407 .snd_portid = upcall_info->portid,
408 };
409 size_t len;
Jesse Grossccb13522011-10-25 19:26:31 -0700410 int err;
411
412 if (vlan_tx_tag_present(skb)) {
413 nskb = skb_clone(skb, GFP_ATOMIC);
414 if (!nskb)
415 return -ENOMEM;
416
Patrick McHardy86a9bad2013-04-19 02:04:30 +0000417 nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb));
Dan Carpenter8aa51d62012-05-13 08:44:18 +0000418 if (!nskb)
Jesse Grossccb13522011-10-25 19:26:31 -0700419 return -ENOMEM;
420
421 nskb->vlan_tci = 0;
422 skb = nskb;
423 }
424
425 if (nla_attr_size(skb->len) > USHRT_MAX) {
426 err = -EFBIG;
427 goto out;
428 }
429
Thomas Graf795449d2013-11-30 13:21:32 +0100430 len = upcall_msg_size(skb, upcall_info->userdata);
431 user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC);
Jesse Grossccb13522011-10-25 19:26:31 -0700432 if (!user_skb) {
433 err = -ENOMEM;
434 goto out;
435 }
436
437 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
438 0, upcall_info->cmd);
439 upcall->dp_ifindex = dp_ifindex;
440
441 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
Pravin B Shelare6445712013-10-03 18:16:47 -0700442 ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb);
Jesse Grossccb13522011-10-25 19:26:31 -0700443 nla_nest_end(user_skb, nla);
444
445 if (upcall_info->userdata)
Ben Pfaff44901082013-02-15 17:29:22 -0800446 __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
447 nla_len(upcall_info->userdata),
448 nla_data(upcall_info->userdata));
Jesse Grossccb13522011-10-25 19:26:31 -0700449
450 nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len);
451
452 skb_copy_and_csum_dev(skb, nla_data(nla));
453
Rich Lanea15ff762013-02-15 11:07:43 -0800454 genlmsg_end(user_skb, upcall);
Eric W. Biederman15e47302012-09-07 20:12:54 +0000455 err = genlmsg_unicast(net, user_skb, upcall_info->portid);
Jesse Grossccb13522011-10-25 19:26:31 -0700456
457out:
458 kfree_skb(nskb);
459 return err;
460}
461
Jesse Grossccb13522011-10-25 19:26:31 -0700462static void clear_stats(struct sw_flow *flow)
463{
464 flow->used = 0;
465 flow->tcp_flags = 0;
466 flow->packet_count = 0;
467 flow->byte_count = 0;
468}
469
470static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
471{
472 struct ovs_header *ovs_header = info->userhdr;
473 struct nlattr **a = info->attrs;
474 struct sw_flow_actions *acts;
475 struct sk_buff *packet;
476 struct sw_flow *flow;
477 struct datapath *dp;
478 struct ethhdr *eth;
479 int len;
480 int err;
Jesse Grossccb13522011-10-25 19:26:31 -0700481
482 err = -EINVAL;
483 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
Thomas Grafdded45fc2013-03-29 14:46:47 +0100484 !a[OVS_PACKET_ATTR_ACTIONS])
Jesse Grossccb13522011-10-25 19:26:31 -0700485 goto err;
486
487 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
488 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
489 err = -ENOMEM;
490 if (!packet)
491 goto err;
492 skb_reserve(packet, NET_IP_ALIGN);
493
Thomas Graf32686a92013-03-29 14:46:48 +0100494 nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
Jesse Grossccb13522011-10-25 19:26:31 -0700495
496 skb_reset_mac_header(packet);
497 eth = eth_hdr(packet);
498
499 /* Normally, setting the skb 'protocol' field would be handled by a
500 * call to eth_type_trans(), but it assumes there's a sending
501 * device, which we may not have. */
Simon Hormane5c5d222013-03-28 13:38:25 +0900502 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
Jesse Grossccb13522011-10-25 19:26:31 -0700503 packet->protocol = eth->h_proto;
504 else
505 packet->protocol = htons(ETH_P_802_2);
506
507 /* Build an sw_flow for sending this packet. */
508 flow = ovs_flow_alloc();
509 err = PTR_ERR(flow);
510 if (IS_ERR(flow))
511 goto err_kfree_skb;
512
Andy Zhou03f0d912013-08-07 20:01:00 -0700513 err = ovs_flow_extract(packet, -1, &flow->key);
Jesse Grossccb13522011-10-25 19:26:31 -0700514 if (err)
515 goto err_flow_free;
516
Pravin B Shelare6445712013-10-03 18:16:47 -0700517 err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]);
Jesse Grossccb13522011-10-25 19:26:31 -0700518 if (err)
519 goto err_flow_free;
Pravin B Shelare6445712013-10-03 18:16:47 -0700520 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS]));
Jesse Grossccb13522011-10-25 19:26:31 -0700521 err = PTR_ERR(acts);
522 if (IS_ERR(acts))
523 goto err_flow_free;
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700524
Pravin B Shelare6445712013-10-03 18:16:47 -0700525 err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS],
526 &flow->key, 0, &acts);
Jesse Grossccb13522011-10-25 19:26:31 -0700527 rcu_assign_pointer(flow->sf_acts, acts);
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700528 if (err)
529 goto err_flow_free;
Jesse Grossccb13522011-10-25 19:26:31 -0700530
531 OVS_CB(packet)->flow = flow;
Andy Zhou03f0d912013-08-07 20:01:00 -0700532 OVS_CB(packet)->pkt_key = &flow->key;
Jesse Grossccb13522011-10-25 19:26:31 -0700533 packet->priority = flow->key.phy.priority;
Ansis Atteka39c7caeb2012-11-26 11:24:11 -0800534 packet->mark = flow->key.phy.skb_mark;
Jesse Grossccb13522011-10-25 19:26:31 -0700535
536 rcu_read_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800537 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -0700538 err = -ENODEV;
539 if (!dp)
540 goto err_unlock;
541
542 local_bh_disable();
543 err = ovs_execute_actions(dp, packet);
544 local_bh_enable();
545 rcu_read_unlock();
546
Andy Zhou03f0d912013-08-07 20:01:00 -0700547 ovs_flow_free(flow, false);
Jesse Grossccb13522011-10-25 19:26:31 -0700548 return err;
549
550err_unlock:
551 rcu_read_unlock();
552err_flow_free:
Andy Zhou03f0d912013-08-07 20:01:00 -0700553 ovs_flow_free(flow, false);
Jesse Grossccb13522011-10-25 19:26:31 -0700554err_kfree_skb:
555 kfree_skb(packet);
556err:
557 return err;
558}
559
560static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
Thomas Grafdded45fc2013-03-29 14:46:47 +0100561 [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
Jesse Grossccb13522011-10-25 19:26:31 -0700562 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
563 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
564};
565
Johannes Berg4534de82013-11-14 17:14:46 +0100566static const struct genl_ops dp_packet_genl_ops[] = {
Jesse Grossccb13522011-10-25 19:26:31 -0700567 { .cmd = OVS_PACKET_CMD_EXECUTE,
568 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
569 .policy = packet_policy,
570 .doit = ovs_packet_cmd_execute
571 }
572};
573
Andy Zhou1bd71162013-10-22 10:42:46 -0700574static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats,
575 struct ovs_dp_megaflow_stats *mega_stats)
Jesse Grossccb13522011-10-25 19:26:31 -0700576{
577 int i;
Jesse Grossccb13522011-10-25 19:26:31 -0700578
Andy Zhou1bd71162013-10-22 10:42:46 -0700579 memset(mega_stats, 0, sizeof(*mega_stats));
580
Pravin B Shelarb637e492013-10-04 00:14:23 -0700581 stats->n_flows = ovs_flow_tbl_count(&dp->table);
Andy Zhou1bd71162013-10-22 10:42:46 -0700582 mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table);
Jesse Grossccb13522011-10-25 19:26:31 -0700583
584 stats->n_hit = stats->n_missed = stats->n_lost = 0;
Andy Zhou1bd71162013-10-22 10:42:46 -0700585
Jesse Grossccb13522011-10-25 19:26:31 -0700586 for_each_possible_cpu(i) {
587 const struct dp_stats_percpu *percpu_stats;
588 struct dp_stats_percpu local_stats;
589 unsigned int start;
590
591 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
592
593 do {
594 start = u64_stats_fetch_begin_bh(&percpu_stats->sync);
595 local_stats = *percpu_stats;
596 } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start));
597
598 stats->n_hit += local_stats.n_hit;
599 stats->n_missed += local_stats.n_missed;
600 stats->n_lost += local_stats.n_lost;
Andy Zhou1bd71162013-10-22 10:42:46 -0700601 mega_stats->n_mask_hit += local_stats.n_mask_hit;
Jesse Grossccb13522011-10-25 19:26:31 -0700602 }
603}
604
605static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
606 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
607 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
608 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
609};
610
611static struct genl_family dp_flow_genl_family = {
612 .id = GENL_ID_GENERATE,
613 .hdrsize = sizeof(struct ovs_header),
614 .name = OVS_FLOW_FAMILY,
615 .version = OVS_FLOW_VERSION,
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800616 .maxattr = OVS_FLOW_ATTR_MAX,
Pravin B Shelar3a4e0d62013-04-23 07:48:48 +0000617 .netnsok = true,
618 .parallel_ops = true,
Jesse Grossccb13522011-10-25 19:26:31 -0700619};
620
621static struct genl_multicast_group ovs_dp_flow_multicast_group = {
622 .name = OVS_FLOW_MCGROUP
623};
624
Thomas Grafc3ff8cf2013-03-29 14:46:49 +0100625static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)
626{
627 return NLMSG_ALIGN(sizeof(struct ovs_header))
628 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */
Andy Zhou03f0d912013-08-07 20:01:00 -0700629 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */
Thomas Grafc3ff8cf2013-03-29 14:46:49 +0100630 + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
631 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
632 + nla_total_size(8) /* OVS_FLOW_ATTR_USED */
633 + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */
634}
635
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700636/* Called with ovs_mutex. */
Jesse Grossccb13522011-10-25 19:26:31 -0700637static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000638 struct sk_buff *skb, u32 portid,
Jesse Grossccb13522011-10-25 19:26:31 -0700639 u32 seq, u32 flags, u8 cmd)
640{
641 const int skb_orig_len = skb->len;
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700642 struct nlattr *start;
Jesse Grossccb13522011-10-25 19:26:31 -0700643 struct ovs_flow_stats stats;
644 struct ovs_header *ovs_header;
645 struct nlattr *nla;
646 unsigned long used;
647 u8 tcp_flags;
648 int err;
649
Eric W. Biederman15e47302012-09-07 20:12:54 +0000650 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd);
Jesse Grossccb13522011-10-25 19:26:31 -0700651 if (!ovs_header)
652 return -EMSGSIZE;
653
654 ovs_header->dp_ifindex = get_dpifindex(dp);
655
Andy Zhou03f0d912013-08-07 20:01:00 -0700656 /* Fill flow key. */
Jesse Grossccb13522011-10-25 19:26:31 -0700657 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
658 if (!nla)
659 goto nla_put_failure;
Andy Zhou03f0d912013-08-07 20:01:00 -0700660
Pravin B Shelare6445712013-10-03 18:16:47 -0700661 err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb);
Jesse Grossccb13522011-10-25 19:26:31 -0700662 if (err)
663 goto error;
664 nla_nest_end(skb, nla);
665
Andy Zhou03f0d912013-08-07 20:01:00 -0700666 nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK);
667 if (!nla)
668 goto nla_put_failure;
669
Pravin B Shelare6445712013-10-03 18:16:47 -0700670 err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb);
Andy Zhou03f0d912013-08-07 20:01:00 -0700671 if (err)
672 goto error;
673
674 nla_nest_end(skb, nla);
675
Jesse Grossccb13522011-10-25 19:26:31 -0700676 spin_lock_bh(&flow->lock);
677 used = flow->used;
678 stats.n_packets = flow->packet_count;
679 stats.n_bytes = flow->byte_count;
Jarno Rajahalmedf23e9f2013-10-23 01:40:44 -0700680 tcp_flags = (u8)ntohs(flow->tcp_flags);
Jesse Grossccb13522011-10-25 19:26:31 -0700681 spin_unlock_bh(&flow->lock);
682
David S. Miller028d6a62012-03-29 23:20:48 -0400683 if (used &&
684 nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used)))
685 goto nla_put_failure;
Jesse Grossccb13522011-10-25 19:26:31 -0700686
David S. Miller028d6a62012-03-29 23:20:48 -0400687 if (stats.n_packets &&
688 nla_put(skb, OVS_FLOW_ATTR_STATS,
689 sizeof(struct ovs_flow_stats), &stats))
690 goto nla_put_failure;
Jesse Grossccb13522011-10-25 19:26:31 -0700691
David S. Miller028d6a62012-03-29 23:20:48 -0400692 if (tcp_flags &&
693 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags))
694 goto nla_put_failure;
Jesse Grossccb13522011-10-25 19:26:31 -0700695
696 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
697 * this is the first flow to be dumped into 'skb'. This is unusual for
698 * Netlink but individual action lists can be longer than
699 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
700 * The userspace caller can always fetch the actions separately if it
701 * really wants them. (Most userspace callers in fact don't care.)
702 *
703 * This can only fail for dump operations because the skb is always
704 * properly sized for single flows.
705 */
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700706 start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS);
707 if (start) {
Pravin B Shelard57170b2013-07-30 15:39:39 -0700708 const struct sw_flow_actions *sf_acts;
709
Jesse Gross663efa32013-12-03 10:58:53 -0800710 sf_acts = rcu_dereference_ovsl(flow->sf_acts);
Pravin B Shelard57170b2013-07-30 15:39:39 -0700711
Pravin B Shelare6445712013-10-03 18:16:47 -0700712 err = ovs_nla_put_actions(sf_acts->actions,
713 sf_acts->actions_len, skb);
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700714 if (!err)
715 nla_nest_end(skb, start);
716 else {
717 if (skb_orig_len)
718 goto error;
719
720 nla_nest_cancel(skb, start);
721 }
722 } else if (skb_orig_len)
723 goto nla_put_failure;
Jesse Grossccb13522011-10-25 19:26:31 -0700724
725 return genlmsg_end(skb, ovs_header);
726
727nla_put_failure:
728 err = -EMSGSIZE;
729error:
730 genlmsg_cancel(skb, ovs_header);
731 return err;
732}
733
Thomas Graf795449d2013-11-30 13:21:32 +0100734static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow,
735 struct genl_info *info)
Jesse Grossccb13522011-10-25 19:26:31 -0700736{
Thomas Graf795449d2013-11-30 13:21:32 +0100737 size_t len;
Jesse Grossccb13522011-10-25 19:26:31 -0700738
Thomas Graf795449d2013-11-30 13:21:32 +0100739 len = ovs_flow_cmd_msg_size(ovsl_dereference(flow->sf_acts));
Jesse Grossccb13522011-10-25 19:26:31 -0700740
Thomas Graf795449d2013-11-30 13:21:32 +0100741 return genlmsg_new_unicast(len, info, GFP_KERNEL);
Jesse Grossccb13522011-10-25 19:26:31 -0700742}
743
744static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow,
745 struct datapath *dp,
Thomas Graf795449d2013-11-30 13:21:32 +0100746 struct genl_info *info,
747 u8 cmd)
Jesse Grossccb13522011-10-25 19:26:31 -0700748{
749 struct sk_buff *skb;
750 int retval;
751
Thomas Graf795449d2013-11-30 13:21:32 +0100752 skb = ovs_flow_cmd_alloc_info(flow, info);
Jesse Grossccb13522011-10-25 19:26:31 -0700753 if (!skb)
754 return ERR_PTR(-ENOMEM);
755
Thomas Graf795449d2013-11-30 13:21:32 +0100756 retval = ovs_flow_cmd_fill_info(flow, dp, skb, info->snd_portid,
757 info->snd_seq, 0, cmd);
Jesse Grossccb13522011-10-25 19:26:31 -0700758 BUG_ON(retval < 0);
759 return skb;
760}
761
762static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
763{
764 struct nlattr **a = info->attrs;
765 struct ovs_header *ovs_header = info->userhdr;
Andy Zhou03f0d912013-08-07 20:01:00 -0700766 struct sw_flow_key key, masked_key;
767 struct sw_flow *flow = NULL;
768 struct sw_flow_mask mask;
Jesse Grossccb13522011-10-25 19:26:31 -0700769 struct sk_buff *reply;
770 struct datapath *dp;
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700771 struct sw_flow_actions *acts = NULL;
Andy Zhou03f0d912013-08-07 20:01:00 -0700772 struct sw_flow_match match;
Jesse Grossccb13522011-10-25 19:26:31 -0700773 int error;
Jesse Grossccb13522011-10-25 19:26:31 -0700774
775 /* Extract key. */
776 error = -EINVAL;
777 if (!a[OVS_FLOW_ATTR_KEY])
778 goto error;
Andy Zhou03f0d912013-08-07 20:01:00 -0700779
780 ovs_match_init(&match, &key, &mask);
Pravin B Shelare6445712013-10-03 18:16:47 -0700781 error = ovs_nla_get_match(&match,
782 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
Jesse Grossccb13522011-10-25 19:26:31 -0700783 if (error)
784 goto error;
785
786 /* Validate actions. */
787 if (a[OVS_FLOW_ATTR_ACTIONS]) {
Pravin B Shelare6445712013-10-03 18:16:47 -0700788 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700789 error = PTR_ERR(acts);
790 if (IS_ERR(acts))
Jesse Grossccb13522011-10-25 19:26:31 -0700791 goto error;
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700792
Pravin B Shelare6445712013-10-03 18:16:47 -0700793 ovs_flow_mask_key(&masked_key, &key, &mask);
794 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS],
795 &masked_key, 0, &acts);
Andy Zhou03f0d912013-08-07 20:01:00 -0700796 if (error) {
797 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700798 goto err_kfree;
Andy Zhou03f0d912013-08-07 20:01:00 -0700799 }
Jesse Grossccb13522011-10-25 19:26:31 -0700800 } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) {
801 error = -EINVAL;
802 goto error;
803 }
804
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700805 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800806 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -0700807 error = -ENODEV;
808 if (!dp)
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700809 goto err_unlock_ovs;
Jesse Grossccb13522011-10-25 19:26:31 -0700810
Andy Zhou03f0d912013-08-07 20:01:00 -0700811 /* Check if this is a duplicate flow */
Andy Zhou5bb50632013-11-25 10:42:46 -0800812 flow = ovs_flow_tbl_lookup(&dp->table, &key);
Jesse Grossccb13522011-10-25 19:26:31 -0700813 if (!flow) {
Jesse Grossccb13522011-10-25 19:26:31 -0700814 /* Bail out if we're not allowed to create a new flow. */
815 error = -ENOENT;
816 if (info->genlhdr->cmd == OVS_FLOW_CMD_SET)
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700817 goto err_unlock_ovs;
Jesse Grossccb13522011-10-25 19:26:31 -0700818
Jesse Grossccb13522011-10-25 19:26:31 -0700819 /* Allocate flow. */
820 flow = ovs_flow_alloc();
821 if (IS_ERR(flow)) {
822 error = PTR_ERR(flow);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700823 goto err_unlock_ovs;
Jesse Grossccb13522011-10-25 19:26:31 -0700824 }
Jesse Grossccb13522011-10-25 19:26:31 -0700825 clear_stats(flow);
826
Andy Zhou03f0d912013-08-07 20:01:00 -0700827 flow->key = masked_key;
828 flow->unmasked_key = key;
Jesse Grossccb13522011-10-25 19:26:31 -0700829 rcu_assign_pointer(flow->sf_acts, acts);
830
831 /* Put flow in bucket. */
Pravin B Shelar618ed0c2013-10-04 00:17:42 -0700832 error = ovs_flow_tbl_insert(&dp->table, flow, &mask);
833 if (error) {
834 acts = NULL;
835 goto err_flow_free;
836 }
Jesse Grossccb13522011-10-25 19:26:31 -0700837
Thomas Graf795449d2013-11-30 13:21:32 +0100838 reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW);
Jesse Grossccb13522011-10-25 19:26:31 -0700839 } else {
840 /* We found a matching flow. */
841 struct sw_flow_actions *old_acts;
Jesse Grossccb13522011-10-25 19:26:31 -0700842
843 /* Bail out if we're not allowed to modify an existing flow.
844 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
845 * because Generic Netlink treats the latter as a dump
846 * request. We also accept NLM_F_EXCL in case that bug ever
847 * gets fixed.
848 */
849 error = -EEXIST;
850 if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW &&
851 info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL))
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700852 goto err_unlock_ovs;
Jesse Grossccb13522011-10-25 19:26:31 -0700853
Andy Zhou03f0d912013-08-07 20:01:00 -0700854 /* The unmasked key has to be the same for flow updates. */
855 error = -EINVAL;
Pravin B Shelare6445712013-10-03 18:16:47 -0700856 if (!ovs_flow_cmp_unmasked_key(flow, &match)) {
Andy Zhou03f0d912013-08-07 20:01:00 -0700857 OVS_NLERR("Flow modification message rejected, unmasked key does not match.\n");
858 goto err_unlock_ovs;
859 }
860
Jesse Grossccb13522011-10-25 19:26:31 -0700861 /* Update actions. */
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700862 old_acts = ovsl_dereference(flow->sf_acts);
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700863 rcu_assign_pointer(flow->sf_acts, acts);
Pravin B Shelare6445712013-10-03 18:16:47 -0700864 ovs_nla_free_flow_actions(old_acts);
Jesse Grossccb13522011-10-25 19:26:31 -0700865
Thomas Graf795449d2013-11-30 13:21:32 +0100866 reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW);
Jesse Grossccb13522011-10-25 19:26:31 -0700867
868 /* Clear stats. */
869 if (a[OVS_FLOW_ATTR_CLEAR]) {
870 spin_lock_bh(&flow->lock);
871 clear_stats(flow);
872 spin_unlock_bh(&flow->lock);
873 }
874 }
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700875 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -0700876
877 if (!IS_ERR(reply))
Johannes Berg2a94fe42013-11-19 15:19:39 +0100878 ovs_notify(&dp_flow_genl_family, reply, info);
Jesse Grossccb13522011-10-25 19:26:31 -0700879 else
Johannes Berg68eb5502013-11-19 15:19:38 +0100880 genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0,
Johannes Berg2a94fe42013-11-19 15:19:39 +0100881 0, PTR_ERR(reply));
Jesse Grossccb13522011-10-25 19:26:31 -0700882 return 0;
883
Andy Zhou03f0d912013-08-07 20:01:00 -0700884err_flow_free:
885 ovs_flow_free(flow, false);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700886err_unlock_ovs:
887 ovs_unlock();
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700888err_kfree:
889 kfree(acts);
Jesse Grossccb13522011-10-25 19:26:31 -0700890error:
891 return error;
892}
893
894static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
895{
896 struct nlattr **a = info->attrs;
897 struct ovs_header *ovs_header = info->userhdr;
898 struct sw_flow_key key;
899 struct sk_buff *reply;
900 struct sw_flow *flow;
901 struct datapath *dp;
Andy Zhou03f0d912013-08-07 20:01:00 -0700902 struct sw_flow_match match;
Jesse Grossccb13522011-10-25 19:26:31 -0700903 int err;
Jesse Grossccb13522011-10-25 19:26:31 -0700904
Andy Zhou03f0d912013-08-07 20:01:00 -0700905 if (!a[OVS_FLOW_ATTR_KEY]) {
906 OVS_NLERR("Flow get message rejected, Key attribute missing.\n");
Jesse Grossccb13522011-10-25 19:26:31 -0700907 return -EINVAL;
Andy Zhou03f0d912013-08-07 20:01:00 -0700908 }
909
910 ovs_match_init(&match, &key, NULL);
Pravin B Shelare6445712013-10-03 18:16:47 -0700911 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
Jesse Grossccb13522011-10-25 19:26:31 -0700912 if (err)
913 return err;
914
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700915 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800916 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700917 if (!dp) {
918 err = -ENODEV;
919 goto unlock;
920 }
Jesse Grossccb13522011-10-25 19:26:31 -0700921
Andy Zhou5bb50632013-11-25 10:42:46 -0800922 flow = ovs_flow_tbl_lookup(&dp->table, &key);
Pravin B Shelare6445712013-10-03 18:16:47 -0700923 if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) {
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700924 err = -ENOENT;
925 goto unlock;
926 }
Jesse Grossccb13522011-10-25 19:26:31 -0700927
Thomas Graf795449d2013-11-30 13:21:32 +0100928 reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700929 if (IS_ERR(reply)) {
930 err = PTR_ERR(reply);
931 goto unlock;
932 }
Jesse Grossccb13522011-10-25 19:26:31 -0700933
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700934 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -0700935 return genlmsg_reply(reply, info);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700936unlock:
937 ovs_unlock();
938 return err;
Jesse Grossccb13522011-10-25 19:26:31 -0700939}
940
941static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
942{
943 struct nlattr **a = info->attrs;
944 struct ovs_header *ovs_header = info->userhdr;
945 struct sw_flow_key key;
946 struct sk_buff *reply;
947 struct sw_flow *flow;
948 struct datapath *dp;
Andy Zhou03f0d912013-08-07 20:01:00 -0700949 struct sw_flow_match match;
Jesse Grossccb13522011-10-25 19:26:31 -0700950 int err;
Jesse Grossccb13522011-10-25 19:26:31 -0700951
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700952 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800953 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700954 if (!dp) {
955 err = -ENODEV;
956 goto unlock;
957 }
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800958
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700959 if (!a[OVS_FLOW_ATTR_KEY]) {
Pravin B Shelarb637e492013-10-04 00:14:23 -0700960 err = ovs_flow_tbl_flush(&dp->table);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700961 goto unlock;
962 }
Andy Zhou03f0d912013-08-07 20:01:00 -0700963
964 ovs_match_init(&match, &key, NULL);
Pravin B Shelare6445712013-10-03 18:16:47 -0700965 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
Jesse Grossccb13522011-10-25 19:26:31 -0700966 if (err)
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700967 goto unlock;
Jesse Grossccb13522011-10-25 19:26:31 -0700968
Andy Zhou5bb50632013-11-25 10:42:46 -0800969 flow = ovs_flow_tbl_lookup(&dp->table, &key);
Pravin B Shelare6445712013-10-03 18:16:47 -0700970 if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) {
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700971 err = -ENOENT;
972 goto unlock;
973 }
Jesse Grossccb13522011-10-25 19:26:31 -0700974
Thomas Graf795449d2013-11-30 13:21:32 +0100975 reply = ovs_flow_cmd_alloc_info(flow, info);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700976 if (!reply) {
977 err = -ENOMEM;
978 goto unlock;
979 }
Jesse Grossccb13522011-10-25 19:26:31 -0700980
Pravin B Shelarb637e492013-10-04 00:14:23 -0700981 ovs_flow_tbl_remove(&dp->table, flow);
Jesse Grossccb13522011-10-25 19:26:31 -0700982
Eric W. Biederman15e47302012-09-07 20:12:54 +0000983 err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid,
Jesse Grossccb13522011-10-25 19:26:31 -0700984 info->snd_seq, 0, OVS_FLOW_CMD_DEL);
985 BUG_ON(err < 0);
986
Andy Zhou03f0d912013-08-07 20:01:00 -0700987 ovs_flow_free(flow, true);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700988 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -0700989
Johannes Berg2a94fe42013-11-19 15:19:39 +0100990 ovs_notify(&dp_flow_genl_family, reply, info);
Jesse Grossccb13522011-10-25 19:26:31 -0700991 return 0;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700992unlock:
993 ovs_unlock();
994 return err;
Jesse Grossccb13522011-10-25 19:26:31 -0700995}
996
997static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
998{
999 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
Pravin B Shelarb637e492013-10-04 00:14:23 -07001000 struct table_instance *ti;
Jesse Grossccb13522011-10-25 19:26:31 -07001001 struct datapath *dp;
Jesse Grossccb13522011-10-25 19:26:31 -07001002
Pravin B Shelard57170b2013-07-30 15:39:39 -07001003 rcu_read_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001004 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001005 if (!dp) {
Pravin B Shelard57170b2013-07-30 15:39:39 -07001006 rcu_read_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001007 return -ENODEV;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001008 }
Jesse Grossccb13522011-10-25 19:26:31 -07001009
Pravin B Shelarb637e492013-10-04 00:14:23 -07001010 ti = rcu_dereference(dp->table.ti);
Jesse Grossccb13522011-10-25 19:26:31 -07001011 for (;;) {
1012 struct sw_flow *flow;
1013 u32 bucket, obj;
1014
1015 bucket = cb->args[0];
1016 obj = cb->args[1];
Pravin B Shelarb637e492013-10-04 00:14:23 -07001017 flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj);
Jesse Grossccb13522011-10-25 19:26:31 -07001018 if (!flow)
1019 break;
1020
1021 if (ovs_flow_cmd_fill_info(flow, dp, skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001022 NETLINK_CB(cb->skb).portid,
Jesse Grossccb13522011-10-25 19:26:31 -07001023 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1024 OVS_FLOW_CMD_NEW) < 0)
1025 break;
1026
1027 cb->args[0] = bucket;
1028 cb->args[1] = obj;
1029 }
Pravin B Shelard57170b2013-07-30 15:39:39 -07001030 rcu_read_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001031 return skb->len;
1032}
1033
Johannes Berg4534de82013-11-14 17:14:46 +01001034static const struct genl_ops dp_flow_genl_ops[] = {
Jesse Grossccb13522011-10-25 19:26:31 -07001035 { .cmd = OVS_FLOW_CMD_NEW,
1036 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1037 .policy = flow_policy,
1038 .doit = ovs_flow_cmd_new_or_set
1039 },
1040 { .cmd = OVS_FLOW_CMD_DEL,
1041 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1042 .policy = flow_policy,
1043 .doit = ovs_flow_cmd_del
1044 },
1045 { .cmd = OVS_FLOW_CMD_GET,
1046 .flags = 0, /* OK for unprivileged users. */
1047 .policy = flow_policy,
1048 .doit = ovs_flow_cmd_get,
1049 .dumpit = ovs_flow_cmd_dump
1050 },
1051 { .cmd = OVS_FLOW_CMD_SET,
1052 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1053 .policy = flow_policy,
1054 .doit = ovs_flow_cmd_new_or_set,
1055 },
1056};
1057
1058static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1059 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1060 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1061};
1062
1063static struct genl_family dp_datapath_genl_family = {
1064 .id = GENL_ID_GENERATE,
1065 .hdrsize = sizeof(struct ovs_header),
1066 .name = OVS_DATAPATH_FAMILY,
1067 .version = OVS_DATAPATH_VERSION,
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001068 .maxattr = OVS_DP_ATTR_MAX,
Pravin B Shelar3a4e0d62013-04-23 07:48:48 +00001069 .netnsok = true,
1070 .parallel_ops = true,
Jesse Grossccb13522011-10-25 19:26:31 -07001071};
1072
1073static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
1074 .name = OVS_DATAPATH_MCGROUP
1075};
1076
Thomas Grafc3ff8cf2013-03-29 14:46:49 +01001077static size_t ovs_dp_cmd_msg_size(void)
1078{
1079 size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header));
1080
1081 msgsize += nla_total_size(IFNAMSIZ);
1082 msgsize += nla_total_size(sizeof(struct ovs_dp_stats));
Andy Zhou1bd71162013-10-22 10:42:46 -07001083 msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats));
Thomas Grafc3ff8cf2013-03-29 14:46:49 +01001084
1085 return msgsize;
1086}
1087
Jesse Grossccb13522011-10-25 19:26:31 -07001088static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001089 u32 portid, u32 seq, u32 flags, u8 cmd)
Jesse Grossccb13522011-10-25 19:26:31 -07001090{
1091 struct ovs_header *ovs_header;
1092 struct ovs_dp_stats dp_stats;
Andy Zhou1bd71162013-10-22 10:42:46 -07001093 struct ovs_dp_megaflow_stats dp_megaflow_stats;
Jesse Grossccb13522011-10-25 19:26:31 -07001094 int err;
1095
Eric W. Biederman15e47302012-09-07 20:12:54 +00001096 ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
Jesse Grossccb13522011-10-25 19:26:31 -07001097 flags, cmd);
1098 if (!ovs_header)
1099 goto error;
1100
1101 ovs_header->dp_ifindex = get_dpifindex(dp);
1102
1103 rcu_read_lock();
1104 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
1105 rcu_read_unlock();
1106 if (err)
1107 goto nla_put_failure;
1108
Andy Zhou1bd71162013-10-22 10:42:46 -07001109 get_dp_stats(dp, &dp_stats, &dp_megaflow_stats);
1110 if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats),
1111 &dp_stats))
1112 goto nla_put_failure;
1113
1114 if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS,
1115 sizeof(struct ovs_dp_megaflow_stats),
1116 &dp_megaflow_stats))
David S. Miller028d6a62012-03-29 23:20:48 -04001117 goto nla_put_failure;
Jesse Grossccb13522011-10-25 19:26:31 -07001118
1119 return genlmsg_end(skb, ovs_header);
1120
1121nla_put_failure:
1122 genlmsg_cancel(skb, ovs_header);
1123error:
1124 return -EMSGSIZE;
1125}
1126
Thomas Graf795449d2013-11-30 13:21:32 +01001127static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp,
1128 struct genl_info *info, u8 cmd)
Jesse Grossccb13522011-10-25 19:26:31 -07001129{
1130 struct sk_buff *skb;
1131 int retval;
1132
Thomas Graf795449d2013-11-30 13:21:32 +01001133 skb = genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL);
Jesse Grossccb13522011-10-25 19:26:31 -07001134 if (!skb)
1135 return ERR_PTR(-ENOMEM);
1136
Thomas Graf795449d2013-11-30 13:21:32 +01001137 retval = ovs_dp_cmd_fill_info(dp, skb, info->snd_portid, info->snd_seq, 0, cmd);
Jesse Grossccb13522011-10-25 19:26:31 -07001138 if (retval < 0) {
1139 kfree_skb(skb);
1140 return ERR_PTR(retval);
1141 }
1142 return skb;
1143}
1144
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001145/* Called with ovs_mutex. */
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001146static struct datapath *lookup_datapath(struct net *net,
1147 struct ovs_header *ovs_header,
Jesse Grossccb13522011-10-25 19:26:31 -07001148 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1149{
1150 struct datapath *dp;
1151
1152 if (!a[OVS_DP_ATTR_NAME])
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001153 dp = get_dp(net, ovs_header->dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -07001154 else {
1155 struct vport *vport;
1156
1157 rcu_read_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001158 vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
Jesse Grossccb13522011-10-25 19:26:31 -07001159 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1160 rcu_read_unlock();
1161 }
1162 return dp ? dp : ERR_PTR(-ENODEV);
1163}
1164
1165static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1166{
1167 struct nlattr **a = info->attrs;
1168 struct vport_parms parms;
1169 struct sk_buff *reply;
1170 struct datapath *dp;
1171 struct vport *vport;
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001172 struct ovs_net *ovs_net;
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001173 int err, i;
Jesse Grossccb13522011-10-25 19:26:31 -07001174
1175 err = -EINVAL;
1176 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1177 goto err;
1178
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001179 ovs_lock();
Jesse Grossccb13522011-10-25 19:26:31 -07001180
1181 err = -ENOMEM;
1182 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1183 if (dp == NULL)
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001184 goto err_unlock_ovs;
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001185
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001186 ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
Jesse Grossccb13522011-10-25 19:26:31 -07001187
1188 /* Allocate table. */
Pravin B Shelarb637e492013-10-04 00:14:23 -07001189 err = ovs_flow_tbl_init(&dp->table);
1190 if (err)
Jesse Grossccb13522011-10-25 19:26:31 -07001191 goto err_free_dp;
1192
1193 dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
1194 if (!dp->stats_percpu) {
1195 err = -ENOMEM;
1196 goto err_destroy_table;
1197 }
1198
John Stultz827da442013-10-07 15:51:58 -07001199 for_each_possible_cpu(i) {
1200 struct dp_stats_percpu *dpath_stats;
1201 dpath_stats = per_cpu_ptr(dp->stats_percpu, i);
1202 u64_stats_init(&dpath_stats->sync);
1203 }
1204
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001205 dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
Pravin B Shelare6445712013-10-03 18:16:47 -07001206 GFP_KERNEL);
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001207 if (!dp->ports) {
1208 err = -ENOMEM;
1209 goto err_destroy_percpu;
1210 }
1211
1212 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
1213 INIT_HLIST_HEAD(&dp->ports[i]);
1214
Jesse Grossccb13522011-10-25 19:26:31 -07001215 /* Set up our datapath device. */
1216 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1217 parms.type = OVS_VPORT_TYPE_INTERNAL;
1218 parms.options = NULL;
1219 parms.dp = dp;
1220 parms.port_no = OVSP_LOCAL;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001221 parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]);
Jesse Grossccb13522011-10-25 19:26:31 -07001222
1223 vport = new_vport(&parms);
1224 if (IS_ERR(vport)) {
1225 err = PTR_ERR(vport);
1226 if (err == -EBUSY)
1227 err = -EEXIST;
1228
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001229 goto err_destroy_ports_array;
Jesse Grossccb13522011-10-25 19:26:31 -07001230 }
1231
Thomas Graf795449d2013-11-30 13:21:32 +01001232 reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW);
Jesse Grossccb13522011-10-25 19:26:31 -07001233 err = PTR_ERR(reply);
1234 if (IS_ERR(reply))
1235 goto err_destroy_local_port;
1236
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001237 ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
Pravin B Shelar59a35d62013-07-30 15:42:19 -07001238 list_add_tail_rcu(&dp->list_node, &ovs_net->dps);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001239
1240 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001241
Johannes Berg2a94fe42013-11-19 15:19:39 +01001242 ovs_notify(&dp_datapath_genl_family, reply, info);
Jesse Grossccb13522011-10-25 19:26:31 -07001243 return 0;
1244
1245err_destroy_local_port:
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001246 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001247err_destroy_ports_array:
1248 kfree(dp->ports);
Jesse Grossccb13522011-10-25 19:26:31 -07001249err_destroy_percpu:
1250 free_percpu(dp->stats_percpu);
1251err_destroy_table:
Pravin B Shelar618ed0c2013-10-04 00:17:42 -07001252 ovs_flow_tbl_destroy(&dp->table);
Jesse Grossccb13522011-10-25 19:26:31 -07001253err_free_dp:
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001254 release_net(ovs_dp_get_net(dp));
Jesse Grossccb13522011-10-25 19:26:31 -07001255 kfree(dp);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001256err_unlock_ovs:
1257 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001258err:
1259 return err;
1260}
1261
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001262/* Called with ovs_mutex. */
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001263static void __dp_destroy(struct datapath *dp)
Jesse Grossccb13522011-10-25 19:26:31 -07001264{
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001265 int i;
Jesse Grossccb13522011-10-25 19:26:31 -07001266
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001267 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
1268 struct vport *vport;
Sasha Levinb67bfe02013-02-27 17:06:00 -08001269 struct hlist_node *n;
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001270
Sasha Levinb67bfe02013-02-27 17:06:00 -08001271 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node)
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001272 if (vport->port_no != OVSP_LOCAL)
1273 ovs_dp_detach_port(vport);
1274 }
Jesse Grossccb13522011-10-25 19:26:31 -07001275
Pravin B Shelar59a35d62013-07-30 15:42:19 -07001276 list_del_rcu(&dp->list_node);
Jesse Grossccb13522011-10-25 19:26:31 -07001277
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001278 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1279 * all port in datapath are destroyed first before freeing datapath.
Jesse Grossccb13522011-10-25 19:26:31 -07001280 */
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001281 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
Jesse Grossccb13522011-10-25 19:26:31 -07001282
1283 call_rcu(&dp->rcu, destroy_dp_rcu);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001284}
1285
1286static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1287{
1288 struct sk_buff *reply;
1289 struct datapath *dp;
1290 int err;
1291
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001292 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001293 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1294 err = PTR_ERR(dp);
1295 if (IS_ERR(dp))
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001296 goto unlock;
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001297
Thomas Graf795449d2013-11-30 13:21:32 +01001298 reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_DEL);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001299 err = PTR_ERR(reply);
1300 if (IS_ERR(reply))
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001301 goto unlock;
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001302
1303 __dp_destroy(dp);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001304 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001305
Johannes Berg2a94fe42013-11-19 15:19:39 +01001306 ovs_notify(&dp_datapath_genl_family, reply, info);
Jesse Grossccb13522011-10-25 19:26:31 -07001307
1308 return 0;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001309unlock:
1310 ovs_unlock();
1311 return err;
Jesse Grossccb13522011-10-25 19:26:31 -07001312}
1313
1314static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1315{
1316 struct sk_buff *reply;
1317 struct datapath *dp;
1318 int err;
1319
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001320 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001321 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001322 err = PTR_ERR(dp);
Jesse Grossccb13522011-10-25 19:26:31 -07001323 if (IS_ERR(dp))
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001324 goto unlock;
Jesse Grossccb13522011-10-25 19:26:31 -07001325
Thomas Graf795449d2013-11-30 13:21:32 +01001326 reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW);
Jesse Grossccb13522011-10-25 19:26:31 -07001327 if (IS_ERR(reply)) {
1328 err = PTR_ERR(reply);
Johannes Berg68eb5502013-11-19 15:19:38 +01001329 genl_set_err(&dp_datapath_genl_family, sock_net(skb->sk), 0,
Johannes Berg2a94fe42013-11-19 15:19:39 +01001330 0, err);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001331 err = 0;
1332 goto unlock;
Jesse Grossccb13522011-10-25 19:26:31 -07001333 }
1334
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001335 ovs_unlock();
Johannes Berg2a94fe42013-11-19 15:19:39 +01001336 ovs_notify(&dp_datapath_genl_family, reply, info);
Jesse Grossccb13522011-10-25 19:26:31 -07001337
1338 return 0;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001339unlock:
1340 ovs_unlock();
1341 return err;
Jesse Grossccb13522011-10-25 19:26:31 -07001342}
1343
1344static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1345{
1346 struct sk_buff *reply;
1347 struct datapath *dp;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001348 int err;
Jesse Grossccb13522011-10-25 19:26:31 -07001349
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001350 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001351 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001352 if (IS_ERR(dp)) {
1353 err = PTR_ERR(dp);
1354 goto unlock;
1355 }
Jesse Grossccb13522011-10-25 19:26:31 -07001356
Thomas Graf795449d2013-11-30 13:21:32 +01001357 reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001358 if (IS_ERR(reply)) {
1359 err = PTR_ERR(reply);
1360 goto unlock;
1361 }
Jesse Grossccb13522011-10-25 19:26:31 -07001362
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001363 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001364 return genlmsg_reply(reply, info);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001365
1366unlock:
1367 ovs_unlock();
1368 return err;
Jesse Grossccb13522011-10-25 19:26:31 -07001369}
1370
1371static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1372{
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001373 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
Jesse Grossccb13522011-10-25 19:26:31 -07001374 struct datapath *dp;
1375 int skip = cb->args[0];
1376 int i = 0;
1377
Pravin B Shelar59a35d62013-07-30 15:42:19 -07001378 rcu_read_lock();
1379 list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) {
Ben Pfaff77676fd2012-01-17 13:33:39 +00001380 if (i >= skip &&
Eric W. Biederman15e47302012-09-07 20:12:54 +00001381 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
Jesse Grossccb13522011-10-25 19:26:31 -07001382 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1383 OVS_DP_CMD_NEW) < 0)
1384 break;
1385 i++;
1386 }
Pravin B Shelar59a35d62013-07-30 15:42:19 -07001387 rcu_read_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001388
1389 cb->args[0] = i;
1390
1391 return skb->len;
1392}
1393
Johannes Berg4534de82013-11-14 17:14:46 +01001394static const struct genl_ops dp_datapath_genl_ops[] = {
Jesse Grossccb13522011-10-25 19:26:31 -07001395 { .cmd = OVS_DP_CMD_NEW,
1396 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1397 .policy = datapath_policy,
1398 .doit = ovs_dp_cmd_new
1399 },
1400 { .cmd = OVS_DP_CMD_DEL,
1401 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1402 .policy = datapath_policy,
1403 .doit = ovs_dp_cmd_del
1404 },
1405 { .cmd = OVS_DP_CMD_GET,
1406 .flags = 0, /* OK for unprivileged users. */
1407 .policy = datapath_policy,
1408 .doit = ovs_dp_cmd_get,
1409 .dumpit = ovs_dp_cmd_dump
1410 },
1411 { .cmd = OVS_DP_CMD_SET,
1412 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1413 .policy = datapath_policy,
1414 .doit = ovs_dp_cmd_set,
1415 },
1416};
1417
1418static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1419 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1420 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1421 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1422 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1423 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1424 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1425};
1426
Johannes Berg68eb5502013-11-19 15:19:38 +01001427struct genl_family dp_vport_genl_family = {
Jesse Grossccb13522011-10-25 19:26:31 -07001428 .id = GENL_ID_GENERATE,
1429 .hdrsize = sizeof(struct ovs_header),
1430 .name = OVS_VPORT_FAMILY,
1431 .version = OVS_VPORT_VERSION,
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001432 .maxattr = OVS_VPORT_ATTR_MAX,
Pravin B Shelar3a4e0d62013-04-23 07:48:48 +00001433 .netnsok = true,
1434 .parallel_ops = true,
Jesse Grossccb13522011-10-25 19:26:31 -07001435};
1436
1437struct genl_multicast_group ovs_dp_vport_multicast_group = {
1438 .name = OVS_VPORT_MCGROUP
1439};
1440
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001441/* Called with ovs_mutex or RCU read lock. */
Jesse Grossccb13522011-10-25 19:26:31 -07001442static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001443 u32 portid, u32 seq, u32 flags, u8 cmd)
Jesse Grossccb13522011-10-25 19:26:31 -07001444{
1445 struct ovs_header *ovs_header;
1446 struct ovs_vport_stats vport_stats;
1447 int err;
1448
Eric W. Biederman15e47302012-09-07 20:12:54 +00001449 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
Jesse Grossccb13522011-10-25 19:26:31 -07001450 flags, cmd);
1451 if (!ovs_header)
1452 return -EMSGSIZE;
1453
1454 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1455
David S. Miller028d6a62012-03-29 23:20:48 -04001456 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
1457 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
1458 nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) ||
Eric W. Biederman15e47302012-09-07 20:12:54 +00001459 nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid))
David S. Miller028d6a62012-03-29 23:20:48 -04001460 goto nla_put_failure;
Jesse Grossccb13522011-10-25 19:26:31 -07001461
1462 ovs_vport_get_stats(vport, &vport_stats);
David S. Miller028d6a62012-03-29 23:20:48 -04001463 if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
1464 &vport_stats))
1465 goto nla_put_failure;
Jesse Grossccb13522011-10-25 19:26:31 -07001466
1467 err = ovs_vport_get_options(vport, skb);
1468 if (err == -EMSGSIZE)
1469 goto error;
1470
1471 return genlmsg_end(skb, ovs_header);
1472
1473nla_put_failure:
1474 err = -EMSGSIZE;
1475error:
1476 genlmsg_cancel(skb, ovs_header);
1477 return err;
1478}
1479
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001480/* Called with ovs_mutex or RCU read lock. */
Eric W. Biederman15e47302012-09-07 20:12:54 +00001481struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid,
Jesse Grossccb13522011-10-25 19:26:31 -07001482 u32 seq, u8 cmd)
1483{
1484 struct sk_buff *skb;
1485 int retval;
1486
1487 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1488 if (!skb)
1489 return ERR_PTR(-ENOMEM);
1490
Eric W. Biederman15e47302012-09-07 20:12:54 +00001491 retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd);
Jesse Grossa9341512013-03-26 15:48:38 -07001492 BUG_ON(retval < 0);
1493
Jesse Grossccb13522011-10-25 19:26:31 -07001494 return skb;
1495}
1496
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001497/* Called with ovs_mutex or RCU read lock. */
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001498static struct vport *lookup_vport(struct net *net,
1499 struct ovs_header *ovs_header,
Jesse Grossccb13522011-10-25 19:26:31 -07001500 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1501{
1502 struct datapath *dp;
1503 struct vport *vport;
1504
1505 if (a[OVS_VPORT_ATTR_NAME]) {
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001506 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
Jesse Grossccb13522011-10-25 19:26:31 -07001507 if (!vport)
1508 return ERR_PTR(-ENODEV);
Ben Pfaff651a68e2012-03-06 15:04:04 -08001509 if (ovs_header->dp_ifindex &&
1510 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
1511 return ERR_PTR(-ENODEV);
Jesse Grossccb13522011-10-25 19:26:31 -07001512 return vport;
1513 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1514 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1515
1516 if (port_no >= DP_MAX_PORTS)
1517 return ERR_PTR(-EFBIG);
1518
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001519 dp = get_dp(net, ovs_header->dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -07001520 if (!dp)
1521 return ERR_PTR(-ENODEV);
1522
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001523 vport = ovs_vport_ovsl_rcu(dp, port_no);
Jesse Grossccb13522011-10-25 19:26:31 -07001524 if (!vport)
Jarno Rajahalme14408db2013-01-09 14:27:35 -08001525 return ERR_PTR(-ENODEV);
Jesse Grossccb13522011-10-25 19:26:31 -07001526 return vport;
1527 } else
1528 return ERR_PTR(-EINVAL);
1529}
1530
1531static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1532{
1533 struct nlattr **a = info->attrs;
1534 struct ovs_header *ovs_header = info->userhdr;
1535 struct vport_parms parms;
1536 struct sk_buff *reply;
1537 struct vport *vport;
1538 struct datapath *dp;
1539 u32 port_no;
1540 int err;
1541
1542 err = -EINVAL;
1543 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1544 !a[OVS_VPORT_ATTR_UPCALL_PID])
1545 goto exit;
1546
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001547 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001548 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -07001549 err = -ENODEV;
1550 if (!dp)
1551 goto exit_unlock;
1552
1553 if (a[OVS_VPORT_ATTR_PORT_NO]) {
1554 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1555
1556 err = -EFBIG;
1557 if (port_no >= DP_MAX_PORTS)
1558 goto exit_unlock;
1559
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001560 vport = ovs_vport_ovsl(dp, port_no);
Jesse Grossccb13522011-10-25 19:26:31 -07001561 err = -EBUSY;
1562 if (vport)
1563 goto exit_unlock;
1564 } else {
1565 for (port_no = 1; ; port_no++) {
1566 if (port_no >= DP_MAX_PORTS) {
1567 err = -EFBIG;
1568 goto exit_unlock;
1569 }
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001570 vport = ovs_vport_ovsl(dp, port_no);
Jesse Grossccb13522011-10-25 19:26:31 -07001571 if (!vport)
1572 break;
1573 }
1574 }
1575
1576 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1577 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1578 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1579 parms.dp = dp;
1580 parms.port_no = port_no;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001581 parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
Jesse Grossccb13522011-10-25 19:26:31 -07001582
1583 vport = new_vport(&parms);
1584 err = PTR_ERR(vport);
1585 if (IS_ERR(vport))
1586 goto exit_unlock;
1587
Rich Lanecb7c5bd2013-02-08 13:18:01 -08001588 err = 0;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001589 reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq,
Jesse Grossccb13522011-10-25 19:26:31 -07001590 OVS_VPORT_CMD_NEW);
1591 if (IS_ERR(reply)) {
1592 err = PTR_ERR(reply);
1593 ovs_dp_detach_port(vport);
1594 goto exit_unlock;
1595 }
Thomas Grafed6611852013-03-29 14:46:50 +01001596
Johannes Berg2a94fe42013-11-19 15:19:39 +01001597 ovs_notify(&dp_vport_genl_family, reply, info);
Jesse Grossccb13522011-10-25 19:26:31 -07001598
1599exit_unlock:
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001600 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001601exit:
1602 return err;
1603}
1604
1605static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1606{
1607 struct nlattr **a = info->attrs;
1608 struct sk_buff *reply;
1609 struct vport *vport;
1610 int err;
1611
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001612 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001613 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
Jesse Grossccb13522011-10-25 19:26:31 -07001614 err = PTR_ERR(vport);
1615 if (IS_ERR(vport))
1616 goto exit_unlock;
1617
Jesse Grossccb13522011-10-25 19:26:31 -07001618 if (a[OVS_VPORT_ATTR_TYPE] &&
Jesse Grossf44f3402013-05-13 08:15:26 -07001619 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
Jesse Grossccb13522011-10-25 19:26:31 -07001620 err = -EINVAL;
Jesse Grossf44f3402013-05-13 08:15:26 -07001621 goto exit_unlock;
1622 }
Jesse Grossccb13522011-10-25 19:26:31 -07001623
Jesse Grossa9341512013-03-26 15:48:38 -07001624 reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1625 if (!reply) {
1626 err = -ENOMEM;
1627 goto exit_unlock;
1628 }
1629
Jesse Grossf44f3402013-05-13 08:15:26 -07001630 if (a[OVS_VPORT_ATTR_OPTIONS]) {
Jesse Grossccb13522011-10-25 19:26:31 -07001631 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
Jesse Grossf44f3402013-05-13 08:15:26 -07001632 if (err)
1633 goto exit_free;
1634 }
Jesse Grossa9341512013-03-26 15:48:38 -07001635
Ansis Atteka03fbf8b2012-04-09 12:12:12 -07001636 if (a[OVS_VPORT_ATTR_UPCALL_PID])
Eric W. Biederman15e47302012-09-07 20:12:54 +00001637 vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
Jesse Grossccb13522011-10-25 19:26:31 -07001638
Jesse Grossa9341512013-03-26 15:48:38 -07001639 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1640 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1641 BUG_ON(err < 0);
Jesse Grossccb13522011-10-25 19:26:31 -07001642
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001643 ovs_unlock();
Johannes Berg2a94fe42013-11-19 15:19:39 +01001644 ovs_notify(&dp_vport_genl_family, reply, info);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001645 return 0;
Jesse Grossccb13522011-10-25 19:26:31 -07001646
Jesse Grossa9341512013-03-26 15:48:38 -07001647exit_free:
1648 kfree_skb(reply);
Jesse Grossccb13522011-10-25 19:26:31 -07001649exit_unlock:
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001650 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001651 return err;
1652}
1653
1654static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1655{
1656 struct nlattr **a = info->attrs;
1657 struct sk_buff *reply;
1658 struct vport *vport;
1659 int err;
1660
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001661 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001662 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
Jesse Grossccb13522011-10-25 19:26:31 -07001663 err = PTR_ERR(vport);
1664 if (IS_ERR(vport))
1665 goto exit_unlock;
1666
1667 if (vport->port_no == OVSP_LOCAL) {
1668 err = -EINVAL;
1669 goto exit_unlock;
1670 }
1671
Pravin B Shelar74f84a52013-06-17 17:50:12 -07001672 reply = ovs_vport_cmd_build_info(vport, info->snd_portid,
1673 info->snd_seq, OVS_VPORT_CMD_DEL);
Jesse Grossccb13522011-10-25 19:26:31 -07001674 err = PTR_ERR(reply);
1675 if (IS_ERR(reply))
1676 goto exit_unlock;
1677
Rich Lane734907e2013-02-08 09:30:23 -08001678 err = 0;
Jesse Grossccb13522011-10-25 19:26:31 -07001679 ovs_dp_detach_port(vport);
1680
Johannes Berg2a94fe42013-11-19 15:19:39 +01001681 ovs_notify(&dp_vport_genl_family, reply, info);
Jesse Grossccb13522011-10-25 19:26:31 -07001682
1683exit_unlock:
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001684 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001685 return err;
1686}
1687
1688static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1689{
1690 struct nlattr **a = info->attrs;
1691 struct ovs_header *ovs_header = info->userhdr;
1692 struct sk_buff *reply;
1693 struct vport *vport;
1694 int err;
1695
1696 rcu_read_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001697 vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
Jesse Grossccb13522011-10-25 19:26:31 -07001698 err = PTR_ERR(vport);
1699 if (IS_ERR(vport))
1700 goto exit_unlock;
1701
Pravin B Shelar74f84a52013-06-17 17:50:12 -07001702 reply = ovs_vport_cmd_build_info(vport, info->snd_portid,
1703 info->snd_seq, OVS_VPORT_CMD_NEW);
Jesse Grossccb13522011-10-25 19:26:31 -07001704 err = PTR_ERR(reply);
1705 if (IS_ERR(reply))
1706 goto exit_unlock;
1707
1708 rcu_read_unlock();
1709
1710 return genlmsg_reply(reply, info);
1711
1712exit_unlock:
1713 rcu_read_unlock();
1714 return err;
1715}
1716
1717static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1718{
1719 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1720 struct datapath *dp;
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001721 int bucket = cb->args[0], skip = cb->args[1];
1722 int i, j = 0;
Jesse Grossccb13522011-10-25 19:26:31 -07001723
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001724 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -07001725 if (!dp)
1726 return -ENODEV;
1727
1728 rcu_read_lock();
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001729 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
Jesse Grossccb13522011-10-25 19:26:31 -07001730 struct vport *vport;
1731
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001732 j = 0;
Sasha Levinb67bfe02013-02-27 17:06:00 -08001733 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001734 if (j >= skip &&
1735 ovs_vport_cmd_fill_info(vport, skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001736 NETLINK_CB(cb->skb).portid,
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001737 cb->nlh->nlmsg_seq,
1738 NLM_F_MULTI,
1739 OVS_VPORT_CMD_NEW) < 0)
1740 goto out;
Jesse Grossccb13522011-10-25 19:26:31 -07001741
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001742 j++;
1743 }
1744 skip = 0;
Jesse Grossccb13522011-10-25 19:26:31 -07001745 }
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001746out:
Jesse Grossccb13522011-10-25 19:26:31 -07001747 rcu_read_unlock();
1748
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001749 cb->args[0] = i;
1750 cb->args[1] = j;
Jesse Grossccb13522011-10-25 19:26:31 -07001751
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001752 return skb->len;
Jesse Grossccb13522011-10-25 19:26:31 -07001753}
1754
Johannes Berg4534de82013-11-14 17:14:46 +01001755static const struct genl_ops dp_vport_genl_ops[] = {
Jesse Grossccb13522011-10-25 19:26:31 -07001756 { .cmd = OVS_VPORT_CMD_NEW,
1757 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1758 .policy = vport_policy,
1759 .doit = ovs_vport_cmd_new
1760 },
1761 { .cmd = OVS_VPORT_CMD_DEL,
1762 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1763 .policy = vport_policy,
1764 .doit = ovs_vport_cmd_del
1765 },
1766 { .cmd = OVS_VPORT_CMD_GET,
1767 .flags = 0, /* OK for unprivileged users. */
1768 .policy = vport_policy,
1769 .doit = ovs_vport_cmd_get,
1770 .dumpit = ovs_vport_cmd_dump
1771 },
1772 { .cmd = OVS_VPORT_CMD_SET,
1773 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1774 .policy = vport_policy,
1775 .doit = ovs_vport_cmd_set,
1776 },
1777};
1778
1779struct genl_family_and_ops {
1780 struct genl_family *family;
Johannes Berg4534de82013-11-14 17:14:46 +01001781 const struct genl_ops *ops;
Jesse Grossccb13522011-10-25 19:26:31 -07001782 int n_ops;
Johannes Berg2a94fe42013-11-19 15:19:39 +01001783 const struct genl_multicast_group *group;
Jesse Grossccb13522011-10-25 19:26:31 -07001784};
1785
1786static const struct genl_family_and_ops dp_genl_families[] = {
1787 { &dp_datapath_genl_family,
1788 dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops),
1789 &ovs_dp_datapath_multicast_group },
1790 { &dp_vport_genl_family,
1791 dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops),
1792 &ovs_dp_vport_multicast_group },
1793 { &dp_flow_genl_family,
1794 dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops),
1795 &ovs_dp_flow_multicast_group },
1796 { &dp_packet_genl_family,
1797 dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops),
1798 NULL },
1799};
1800
1801static void dp_unregister_genl(int n_families)
1802{
1803 int i;
1804
1805 for (i = 0; i < n_families; i++)
1806 genl_unregister_family(dp_genl_families[i].family);
1807}
1808
1809static int dp_register_genl(void)
1810{
1811 int n_registered;
1812 int err;
1813 int i;
1814
1815 n_registered = 0;
1816 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
1817 const struct genl_family_and_ops *f = &dp_genl_families[i];
1818
Johannes Bergc53ed742013-11-19 15:19:31 +01001819 f->family->ops = f->ops;
1820 f->family->n_ops = f->n_ops;
Johannes Berg2a94fe42013-11-19 15:19:39 +01001821 f->family->mcgrps = f->group;
1822 f->family->n_mcgrps = f->group ? 1 : 0;
Johannes Bergc53ed742013-11-19 15:19:31 +01001823 err = genl_register_family(f->family);
Jesse Grossccb13522011-10-25 19:26:31 -07001824 if (err)
1825 goto error;
1826 n_registered++;
Jesse Grossccb13522011-10-25 19:26:31 -07001827 }
1828
1829 return 0;
1830
1831error:
1832 dp_unregister_genl(n_registered);
1833 return err;
1834}
1835
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001836static int __net_init ovs_init_net(struct net *net)
1837{
1838 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
1839
1840 INIT_LIST_HEAD(&ovs_net->dps);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001841 INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001842 return 0;
1843}
1844
1845static void __net_exit ovs_exit_net(struct net *net)
1846{
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001847 struct datapath *dp, *dp_next;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001848 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001849
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001850 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001851 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
1852 __dp_destroy(dp);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001853 ovs_unlock();
1854
1855 cancel_work_sync(&ovs_net->dp_notify_work);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001856}
1857
1858static struct pernet_operations ovs_net_ops = {
1859 .init = ovs_init_net,
1860 .exit = ovs_exit_net,
1861 .id = &ovs_net_id,
1862 .size = sizeof(struct ovs_net),
1863};
1864
Jesse Grossccb13522011-10-25 19:26:31 -07001865static int __init dp_init(void)
1866{
Jesse Grossccb13522011-10-25 19:26:31 -07001867 int err;
1868
YOSHIFUJI Hideaki / 吉藤英明3523b292013-01-09 07:19:55 +00001869 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
Jesse Grossccb13522011-10-25 19:26:31 -07001870
1871 pr_info("Open vSwitch switching datapath\n");
1872
1873 err = ovs_flow_init();
1874 if (err)
1875 goto error;
1876
1877 err = ovs_vport_init();
1878 if (err)
1879 goto error_flow_exit;
1880
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001881 err = register_pernet_device(&ovs_net_ops);
Jesse Grossccb13522011-10-25 19:26:31 -07001882 if (err)
1883 goto error_vport_exit;
1884
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001885 err = register_netdevice_notifier(&ovs_dp_device_notifier);
1886 if (err)
1887 goto error_netns_exit;
1888
Jesse Grossccb13522011-10-25 19:26:31 -07001889 err = dp_register_genl();
1890 if (err < 0)
1891 goto error_unreg_notifier;
1892
Jesse Grossccb13522011-10-25 19:26:31 -07001893 return 0;
1894
1895error_unreg_notifier:
1896 unregister_netdevice_notifier(&ovs_dp_device_notifier);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001897error_netns_exit:
1898 unregister_pernet_device(&ovs_net_ops);
Jesse Grossccb13522011-10-25 19:26:31 -07001899error_vport_exit:
1900 ovs_vport_exit();
1901error_flow_exit:
1902 ovs_flow_exit();
1903error:
1904 return err;
1905}
1906
1907static void dp_cleanup(void)
1908{
Jesse Grossccb13522011-10-25 19:26:31 -07001909 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
1910 unregister_netdevice_notifier(&ovs_dp_device_notifier);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001911 unregister_pernet_device(&ovs_net_ops);
1912 rcu_barrier();
Jesse Grossccb13522011-10-25 19:26:31 -07001913 ovs_vport_exit();
1914 ovs_flow_exit();
1915}
1916
1917module_init(dp_init);
1918module_exit(dp_cleanup);
1919
1920MODULE_DESCRIPTION("Open vSwitch switching datapath");
1921MODULE_LICENSE("GPL");