blob: bbb920bf48da87002541ef6422e76ab9ac641c64 [file] [log] [blame]
Jesse Grossccb13522011-10-25 19:26:31 -07001/*
Ben Pfaffad552002014-05-06 16:48:38 -07002 * Copyright (c) 2007-2014 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>
47#include <linux/openvswitch.h>
48#include <linux/rculist.h>
49#include <linux/dmi.h>
Jesse Grossccb13522011-10-25 19:26:31 -070050#include <net/genetlink.h>
Pravin B Shelar46df7b82012-02-22 19:58:59 -080051#include <net/net_namespace.h>
52#include <net/netns/generic.h>
Jesse Grossccb13522011-10-25 19:26:31 -070053
54#include "datapath.h"
55#include "flow.h"
Andy Zhoue80857c2014-01-21 09:31:04 -080056#include "flow_table.h"
Pravin B Shelare6445712013-10-03 18:16:47 -070057#include "flow_netlink.h"
Jesse Grossccb13522011-10-25 19:26:31 -070058#include "vport-internal_dev.h"
Thomas Grafcff63a52013-04-29 13:06:41 +000059#include "vport-netdev.h"
Jesse Grossccb13522011-10-25 19:26:31 -070060
Pravin B Shelar8e4e1712013-04-15 13:23:03 -070061int ovs_net_id __read_mostly;
Thomas Graf62b9c8d2014-10-22 17:29:06 +020062EXPORT_SYMBOL(ovs_net_id);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -070063
Pravin B Shelar0c200ef2014-05-06 16:44:50 -070064static struct genl_family dp_packet_genl_family;
65static struct genl_family dp_flow_genl_family;
66static struct genl_family dp_datapath_genl_family;
67
stephen hemminger48e48a72014-07-16 11:25:52 -070068static const struct genl_multicast_group ovs_dp_flow_multicast_group = {
69 .name = OVS_FLOW_MCGROUP,
Pravin B Shelar0c200ef2014-05-06 16:44:50 -070070};
71
stephen hemminger48e48a72014-07-16 11:25:52 -070072static const struct genl_multicast_group ovs_dp_datapath_multicast_group = {
73 .name = OVS_DATAPATH_MCGROUP,
Pravin B Shelar0c200ef2014-05-06 16:44:50 -070074};
75
stephen hemminger48e48a72014-07-16 11:25:52 -070076static const struct genl_multicast_group ovs_dp_vport_multicast_group = {
77 .name = OVS_VPORT_MCGROUP,
Pravin B Shelar0c200ef2014-05-06 16:44:50 -070078};
79
Jarno Rajahalmefb5d1e92014-05-05 13:13:14 -070080/* Check if need to build a reply message.
81 * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */
Samuel Gauthier9b67aa42014-09-18 10:31:04 +020082static bool ovs_must_notify(struct genl_family *family, struct genl_info *info,
83 unsigned int group)
Jarno Rajahalmefb5d1e92014-05-05 13:13:14 -070084{
85 return info->nlhdr->nlmsg_flags & NLM_F_ECHO ||
Samuel Gauthier9b67aa42014-09-18 10:31:04 +020086 genl_has_listeners(family, genl_info_net(info)->genl_sock,
87 group);
Jarno Rajahalmefb5d1e92014-05-05 13:13:14 -070088}
89
Johannes Berg68eb5502013-11-19 15:19:38 +010090static void ovs_notify(struct genl_family *family,
Johannes Berg2a94fe42013-11-19 15:19:39 +010091 struct sk_buff *skb, struct genl_info *info)
Thomas Grafed6611852013-03-29 14:46:50 +010092{
Johannes Berg68eb5502013-11-19 15:19:38 +010093 genl_notify(family, skb, genl_info_net(info), info->snd_portid,
Johannes Berg2a94fe42013-11-19 15:19:39 +010094 0, info->nlhdr, GFP_KERNEL);
Thomas Grafed6611852013-03-29 14:46:50 +010095}
96
Pravin B Shelar46df7b82012-02-22 19:58:59 -080097/**
Jesse Grossccb13522011-10-25 19:26:31 -070098 * DOC: Locking:
99 *
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700100 * All writes e.g. Writes to device state (add/remove datapath, port, set
101 * operations on vports, etc.), Writes to other state (flow table
102 * modifications, set miscellaneous datapath parameters, etc.) are protected
103 * by ovs_lock.
Jesse Grossccb13522011-10-25 19:26:31 -0700104 *
105 * Reads are protected by RCU.
106 *
107 * There are a few special cases (mostly stats) that have their own
108 * synchronization but they nest under all of above and don't interact with
109 * each other.
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700110 *
111 * The RTNL lock nests inside ovs_mutex.
Jesse Grossccb13522011-10-25 19:26:31 -0700112 */
113
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700114static DEFINE_MUTEX(ovs_mutex);
115
116void ovs_lock(void)
117{
118 mutex_lock(&ovs_mutex);
119}
120
121void ovs_unlock(void)
122{
123 mutex_unlock(&ovs_mutex);
124}
125
126#ifdef CONFIG_LOCKDEP
127int lockdep_ovsl_is_held(void)
128{
129 if (debug_locks)
130 return lockdep_is_held(&ovs_mutex);
131 else
132 return 1;
133}
David S. Miller2c6c49d2014-10-28 17:27:23 -0400134EXPORT_SYMBOL(lockdep_ovsl_is_held);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700135#endif
136
Jesse Grossccb13522011-10-25 19:26:31 -0700137static struct vport *new_vport(const struct vport_parms *);
Thomas Graf8055a892013-12-13 15:22:20 +0100138static int queue_gso_packets(struct datapath *dp, struct sk_buff *,
Jesse Grossccb13522011-10-25 19:26:31 -0700139 const struct dp_upcall_info *);
Thomas Graf8055a892013-12-13 15:22:20 +0100140static int queue_userspace_packet(struct datapath *dp, struct sk_buff *,
Jesse Grossccb13522011-10-25 19:26:31 -0700141 const struct dp_upcall_info *);
142
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700143/* Must be called with rcu_read_lock or ovs_mutex. */
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800144static struct datapath *get_dp(struct net *net, int dp_ifindex)
Jesse Grossccb13522011-10-25 19:26:31 -0700145{
146 struct datapath *dp = NULL;
147 struct net_device *dev;
148
149 rcu_read_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800150 dev = dev_get_by_index_rcu(net, dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -0700151 if (dev) {
152 struct vport *vport = ovs_internal_dev_get_vport(dev);
153 if (vport)
154 dp = vport->dp;
155 }
156 rcu_read_unlock();
157
158 return dp;
159}
160
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700161/* Must be called with rcu_read_lock or ovs_mutex. */
Andy Zhou971427f32014-09-15 19:37:25 -0700162const char *ovs_dp_name(const struct datapath *dp)
Jesse Grossccb13522011-10-25 19:26:31 -0700163{
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700164 struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
Jesse Grossccb13522011-10-25 19:26:31 -0700165 return vport->ops->get_name(vport);
166}
167
168static int get_dpifindex(struct datapath *dp)
169{
170 struct vport *local;
171 int ifindex;
172
173 rcu_read_lock();
174
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700175 local = ovs_vport_rcu(dp, OVSP_LOCAL);
Jesse Grossccb13522011-10-25 19:26:31 -0700176 if (local)
Thomas Grafcff63a52013-04-29 13:06:41 +0000177 ifindex = netdev_vport_priv(local)->dev->ifindex;
Jesse Grossccb13522011-10-25 19:26:31 -0700178 else
179 ifindex = 0;
180
181 rcu_read_unlock();
182
183 return ifindex;
184}
185
186static void destroy_dp_rcu(struct rcu_head *rcu)
187{
188 struct datapath *dp = container_of(rcu, struct datapath, rcu);
189
Pravin B Shelar9b996e52014-05-06 18:41:20 -0700190 ovs_flow_tbl_destroy(&dp->table);
Jesse Grossccb13522011-10-25 19:26:31 -0700191 free_percpu(dp->stats_percpu);
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800192 release_net(ovs_dp_get_net(dp));
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700193 kfree(dp->ports);
Jesse Grossccb13522011-10-25 19:26:31 -0700194 kfree(dp);
195}
196
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700197static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
198 u16 port_no)
199{
200 return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
201}
202
Jarno Rajahalmebb6f9a72014-05-05 11:32:17 -0700203/* Called with ovs_mutex or RCU read lock. */
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700204struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
205{
206 struct vport *vport;
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700207 struct hlist_head *head;
208
209 head = vport_hash_bucket(dp, port_no);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800210 hlist_for_each_entry_rcu(vport, head, dp_hash_node) {
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700211 if (vport->port_no == port_no)
212 return vport;
213 }
214 return NULL;
215}
216
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700217/* Called with ovs_mutex. */
Jesse Grossccb13522011-10-25 19:26:31 -0700218static struct vport *new_vport(const struct vport_parms *parms)
219{
220 struct vport *vport;
221
222 vport = ovs_vport_add(parms);
223 if (!IS_ERR(vport)) {
224 struct datapath *dp = parms->dp;
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700225 struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
Jesse Grossccb13522011-10-25 19:26:31 -0700226
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700227 hlist_add_head_rcu(&vport->dp_hash_node, head);
Jesse Grossccb13522011-10-25 19:26:31 -0700228 }
Jesse Grossccb13522011-10-25 19:26:31 -0700229 return vport;
230}
231
Jesse Grossccb13522011-10-25 19:26:31 -0700232void ovs_dp_detach_port(struct vport *p)
233{
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700234 ASSERT_OVSL();
Jesse Grossccb13522011-10-25 19:26:31 -0700235
236 /* First drop references to device. */
Pravin B Shelar15eac2a2012-08-23 12:40:54 -0700237 hlist_del_rcu(&p->dp_hash_node);
Jesse Grossccb13522011-10-25 19:26:31 -0700238
239 /* Then destroy it. */
240 ovs_vport_del(p);
241}
242
243/* Must be called with rcu_read_lock. */
Pravin B Shelar8c8b1b82014-09-15 19:28:44 -0700244void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key)
Jesse Grossccb13522011-10-25 19:26:31 -0700245{
Pravin B Shelar83c8df22014-09-15 19:20:31 -0700246 const struct vport *p = OVS_CB(skb)->input_vport;
Jesse Grossccb13522011-10-25 19:26:31 -0700247 struct datapath *dp = p->dp;
248 struct sw_flow *flow;
249 struct dp_stats_percpu *stats;
Jesse Grossccb13522011-10-25 19:26:31 -0700250 u64 *stats_counter;
Andy Zhou1bd71162013-10-22 10:42:46 -0700251 u32 n_mask_hit;
Jesse Grossccb13522011-10-25 19:26:31 -0700252
Shan Wei404f2f12012-11-13 09:52:25 +0800253 stats = this_cpu_ptr(dp->stats_percpu);
Jesse Grossccb13522011-10-25 19:26:31 -0700254
Jesse Grossccb13522011-10-25 19:26:31 -0700255 /* Look up flow. */
Pravin B Shelar8c8b1b82014-09-15 19:28:44 -0700256 flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit);
Jesse Grossccb13522011-10-25 19:26:31 -0700257 if (unlikely(!flow)) {
258 struct dp_upcall_info upcall;
Pravin B Shelar8c8b1b82014-09-15 19:28:44 -0700259 int error;
Jesse Grossccb13522011-10-25 19:26:31 -0700260
261 upcall.cmd = OVS_PACKET_CMD_MISS;
Pravin B Shelar8c8b1b82014-09-15 19:28:44 -0700262 upcall.key = key;
Jesse Grossccb13522011-10-25 19:26:31 -0700263 upcall.userdata = NULL;
Alex Wang5cd667b2014-07-17 15:14:13 -0700264 upcall.portid = ovs_vport_find_upcall_portid(p, skb);
Li RongQingc5eba0b2014-09-03 17:43:45 +0800265 error = ovs_dp_upcall(dp, skb, &upcall);
266 if (unlikely(error))
267 kfree_skb(skb);
268 else
269 consume_skb(skb);
Jesse Grossccb13522011-10-25 19:26:31 -0700270 stats_counter = &stats->n_missed;
271 goto out;
272 }
273
274 OVS_CB(skb)->flow = flow;
275
Pravin B Shelar8c8b1b82014-09-15 19:28:44 -0700276 ovs_flow_stats_update(OVS_CB(skb)->flow, key->tp.flags, skb);
277 ovs_execute_actions(dp, skb, key);
Pravin B Shelare298e502013-10-29 17:22:21 -0700278 stats_counter = &stats->n_hit;
Jesse Grossccb13522011-10-25 19:26:31 -0700279
280out:
281 /* Update datapath statistics. */
WANG Congdf9d9fd2014-02-14 15:10:46 -0800282 u64_stats_update_begin(&stats->syncp);
Jesse Grossccb13522011-10-25 19:26:31 -0700283 (*stats_counter)++;
Andy Zhou1bd71162013-10-22 10:42:46 -0700284 stats->n_mask_hit += n_mask_hit;
WANG Congdf9d9fd2014-02-14 15:10:46 -0800285 u64_stats_update_end(&stats->syncp);
Jesse Grossccb13522011-10-25 19:26:31 -0700286}
287
Jesse Grossccb13522011-10-25 19:26:31 -0700288int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800289 const struct dp_upcall_info *upcall_info)
Jesse Grossccb13522011-10-25 19:26:31 -0700290{
291 struct dp_stats_percpu *stats;
Jesse Grossccb13522011-10-25 19:26:31 -0700292 int err;
293
Eric W. Biederman15e47302012-09-07 20:12:54 +0000294 if (upcall_info->portid == 0) {
Jesse Grossccb13522011-10-25 19:26:31 -0700295 err = -ENOTCONN;
296 goto err;
297 }
298
Jesse Grossccb13522011-10-25 19:26:31 -0700299 if (!skb_is_gso(skb))
Thomas Graf8055a892013-12-13 15:22:20 +0100300 err = queue_userspace_packet(dp, skb, upcall_info);
Jesse Grossccb13522011-10-25 19:26:31 -0700301 else
Thomas Graf8055a892013-12-13 15:22:20 +0100302 err = queue_gso_packets(dp, skb, upcall_info);
Jesse Grossccb13522011-10-25 19:26:31 -0700303 if (err)
304 goto err;
305
306 return 0;
307
308err:
Shan Wei404f2f12012-11-13 09:52:25 +0800309 stats = this_cpu_ptr(dp->stats_percpu);
Jesse Grossccb13522011-10-25 19:26:31 -0700310
WANG Congdf9d9fd2014-02-14 15:10:46 -0800311 u64_stats_update_begin(&stats->syncp);
Jesse Grossccb13522011-10-25 19:26:31 -0700312 stats->n_lost++;
WANG Congdf9d9fd2014-02-14 15:10:46 -0800313 u64_stats_update_end(&stats->syncp);
Jesse Grossccb13522011-10-25 19:26:31 -0700314
315 return err;
316}
317
Thomas Graf8055a892013-12-13 15:22:20 +0100318static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
Jesse Grossccb13522011-10-25 19:26:31 -0700319 const struct dp_upcall_info *upcall_info)
320{
Ben Pfaffa1b5d0d2012-07-20 14:47:54 -0700321 unsigned short gso_type = skb_shinfo(skb)->gso_type;
Jesse Grossccb13522011-10-25 19:26:31 -0700322 struct dp_upcall_info later_info;
323 struct sw_flow_key later_key;
324 struct sk_buff *segs, *nskb;
325 int err;
326
Thomas Graf09c5e602013-12-13 15:22:22 +0100327 segs = __skb_gso_segment(skb, NETIF_F_SG, false);
Pravin B Shelar92e5dfc2012-07-20 14:46:29 -0700328 if (IS_ERR(segs))
329 return PTR_ERR(segs);
Florian Westphal330966e2014-10-20 13:49:17 +0200330 if (segs == NULL)
331 return -EINVAL;
Jesse Grossccb13522011-10-25 19:26:31 -0700332
333 /* Queue all of the segments. */
334 skb = segs;
335 do {
Thomas Graf8055a892013-12-13 15:22:20 +0100336 err = queue_userspace_packet(dp, skb, upcall_info);
Jesse Grossccb13522011-10-25 19:26:31 -0700337 if (err)
338 break;
339
Ben Pfaffa1b5d0d2012-07-20 14:47:54 -0700340 if (skb == segs && gso_type & SKB_GSO_UDP) {
Jesse Grossccb13522011-10-25 19:26:31 -0700341 /* The initial flow key extracted by ovs_flow_extract()
342 * in this case is for a first fragment, so we need to
343 * properly mark later fragments.
344 */
345 later_key = *upcall_info->key;
346 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
347
348 later_info = *upcall_info;
349 later_info.key = &later_key;
350 upcall_info = &later_info;
351 }
352 } while ((skb = skb->next));
353
354 /* Free all of the segments. */
355 skb = segs;
356 do {
357 nskb = skb->next;
358 if (err)
359 kfree_skb(skb);
360 else
361 consume_skb(skb);
362 } while ((skb = nskb));
363 return err;
364}
365
Thomas Grafc3ff8cf2013-03-29 14:46:49 +0100366static size_t key_attr_size(void)
367{
368 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
Pravin B Shelar7d5437c2013-06-17 17:50:18 -0700369 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
370 + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
371 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */
372 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */
373 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
374 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
375 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
376 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
Jesse Gross67fa0342014-10-03 15:35:30 -0700377 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
Jesse Grossf5796682014-10-03 15:35:33 -0700378 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
Thomas Grafc3ff8cf2013-03-29 14:46:49 +0100379 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
380 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
381 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
382 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
383 + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */
384 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
385 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
386 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
387 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
388 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
389}
390
Thomas Grafbda56f12013-12-13 15:22:21 +0100391static size_t upcall_msg_size(const struct nlattr *userdata,
392 unsigned int hdrlen)
Thomas Grafc3ff8cf2013-03-29 14:46:49 +0100393{
394 size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
Thomas Grafbda56f12013-12-13 15:22:21 +0100395 + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */
Thomas Grafc3ff8cf2013-03-29 14:46:49 +0100396 + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */
397
398 /* OVS_PACKET_ATTR_USERDATA */
399 if (userdata)
400 size += NLA_ALIGN(userdata->nla_len);
401
402 return size;
403}
404
Thomas Graf8055a892013-12-13 15:22:20 +0100405static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
Jesse Grossccb13522011-10-25 19:26:31 -0700406 const struct dp_upcall_info *upcall_info)
407{
408 struct ovs_header *upcall;
409 struct sk_buff *nskb = NULL;
Li RongQing4ee45ea2014-09-02 20:52:28 +0800410 struct sk_buff *user_skb = NULL; /* to be queued to userspace */
Jesse Grossccb13522011-10-25 19:26:31 -0700411 struct nlattr *nla;
Thomas Graf795449d2013-11-30 13:21:32 +0100412 struct genl_info info = {
Thomas Graf8055a892013-12-13 15:22:20 +0100413 .dst_sk = ovs_dp_get_net(dp)->genl_sock,
Thomas Graf795449d2013-11-30 13:21:32 +0100414 .snd_portid = upcall_info->portid,
415 };
416 size_t len;
Thomas Grafbda56f12013-12-13 15:22:21 +0100417 unsigned int hlen;
Thomas Graf8055a892013-12-13 15:22:20 +0100418 int err, dp_ifindex;
419
420 dp_ifindex = get_dpifindex(dp);
421 if (!dp_ifindex)
422 return -ENODEV;
Jesse Grossccb13522011-10-25 19:26:31 -0700423
424 if (vlan_tx_tag_present(skb)) {
425 nskb = skb_clone(skb, GFP_ATOMIC);
426 if (!nskb)
427 return -ENOMEM;
428
Patrick McHardy86a9bad2013-04-19 02:04:30 +0000429 nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb));
Dan Carpenter8aa51d62012-05-13 08:44:18 +0000430 if (!nskb)
Jesse Grossccb13522011-10-25 19:26:31 -0700431 return -ENOMEM;
432
433 nskb->vlan_tci = 0;
434 skb = nskb;
435 }
436
437 if (nla_attr_size(skb->len) > USHRT_MAX) {
438 err = -EFBIG;
439 goto out;
440 }
441
Thomas Grafbda56f12013-12-13 15:22:21 +0100442 /* Complete checksum if needed */
443 if (skb->ip_summed == CHECKSUM_PARTIAL &&
444 (err = skb_checksum_help(skb)))
445 goto out;
446
447 /* Older versions of OVS user space enforce alignment of the last
448 * Netlink attribute to NLA_ALIGNTO which would require extensive
449 * padding logic. Only perform zerocopy if padding is not required.
450 */
451 if (dp->user_features & OVS_DP_F_UNALIGNED)
452 hlen = skb_zerocopy_headlen(skb);
453 else
454 hlen = skb->len;
455
456 len = upcall_msg_size(upcall_info->userdata, hlen);
Thomas Graf795449d2013-11-30 13:21:32 +0100457 user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC);
Jesse Grossccb13522011-10-25 19:26:31 -0700458 if (!user_skb) {
459 err = -ENOMEM;
460 goto out;
461 }
462
463 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
464 0, upcall_info->cmd);
465 upcall->dp_ifindex = dp_ifindex;
466
467 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
Andy Zhouf53e3832014-07-17 15:17:44 -0700468 err = ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb);
469 BUG_ON(err);
Jesse Grossccb13522011-10-25 19:26:31 -0700470 nla_nest_end(user_skb, nla);
471
472 if (upcall_info->userdata)
Ben Pfaff44901082013-02-15 17:29:22 -0800473 __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
474 nla_len(upcall_info->userdata),
475 nla_data(upcall_info->userdata));
Jesse Grossccb13522011-10-25 19:26:31 -0700476
Thomas Grafbda56f12013-12-13 15:22:21 +0100477 /* Only reserve room for attribute header, packet data is added
478 * in skb_zerocopy() */
479 if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) {
480 err = -ENOBUFS;
481 goto out;
482 }
483 nla->nla_len = nla_attr_size(skb->len);
Jesse Grossccb13522011-10-25 19:26:31 -0700484
Zoltan Kiss36d5fe62014-03-26 22:37:45 +0000485 err = skb_zerocopy(user_skb, skb, skb->len, hlen);
486 if (err)
487 goto out;
Jesse Grossccb13522011-10-25 19:26:31 -0700488
Thomas Grafaea0bb42014-01-14 16:27:49 +0000489 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
490 if (!(dp->user_features & OVS_DP_F_UNALIGNED)) {
491 size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len;
492
493 if (plen > 0)
494 memset(skb_put(user_skb, plen), 0, plen);
495 }
496
Thomas Grafbda56f12013-12-13 15:22:21 +0100497 ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len;
498
Thomas Graf8055a892013-12-13 15:22:20 +0100499 err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid);
Li RongQing4ee45ea2014-09-02 20:52:28 +0800500 user_skb = NULL;
Jesse Grossccb13522011-10-25 19:26:31 -0700501out:
Zoltan Kiss36d5fe62014-03-26 22:37:45 +0000502 if (err)
503 skb_tx_error(skb);
Li RongQing4ee45ea2014-09-02 20:52:28 +0800504 kfree_skb(user_skb);
Jesse Grossccb13522011-10-25 19:26:31 -0700505 kfree_skb(nskb);
506 return err;
507}
508
Jesse Grossccb13522011-10-25 19:26:31 -0700509static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
510{
511 struct ovs_header *ovs_header = info->userhdr;
512 struct nlattr **a = info->attrs;
513 struct sw_flow_actions *acts;
514 struct sk_buff *packet;
515 struct sw_flow *flow;
516 struct datapath *dp;
517 struct ethhdr *eth;
Pravin B Shelar83c8df22014-09-15 19:20:31 -0700518 struct vport *input_vport;
Jesse Grossccb13522011-10-25 19:26:31 -0700519 int len;
520 int err;
Jesse Grossccb13522011-10-25 19:26:31 -0700521
522 err = -EINVAL;
523 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
Thomas Grafdded45fc2013-03-29 14:46:47 +0100524 !a[OVS_PACKET_ATTR_ACTIONS])
Jesse Grossccb13522011-10-25 19:26:31 -0700525 goto err;
526
527 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
528 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
529 err = -ENOMEM;
530 if (!packet)
531 goto err;
532 skb_reserve(packet, NET_IP_ALIGN);
533
Thomas Graf32686a92013-03-29 14:46:48 +0100534 nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
Jesse Grossccb13522011-10-25 19:26:31 -0700535
536 skb_reset_mac_header(packet);
537 eth = eth_hdr(packet);
538
539 /* Normally, setting the skb 'protocol' field would be handled by a
540 * call to eth_type_trans(), but it assumes there's a sending
541 * device, which we may not have. */
Simon Hormane5c5d222013-03-28 13:38:25 +0900542 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
Jesse Grossccb13522011-10-25 19:26:31 -0700543 packet->protocol = eth->h_proto;
544 else
545 packet->protocol = htons(ETH_P_802_2);
546
547 /* Build an sw_flow for sending this packet. */
Jarno Rajahalme23dabf82014-03-27 12:35:23 -0700548 flow = ovs_flow_alloc();
Jesse Grossccb13522011-10-25 19:26:31 -0700549 err = PTR_ERR(flow);
550 if (IS_ERR(flow))
551 goto err_kfree_skb;
552
Pravin B Shelar83c8df22014-09-15 19:20:31 -0700553 err = ovs_flow_key_extract_userspace(a[OVS_PACKET_ATTR_KEY], packet,
554 &flow->key);
Jesse Grossccb13522011-10-25 19:26:31 -0700555 if (err)
556 goto err_flow_free;
557
Pravin B Shelare6445712013-10-03 18:16:47 -0700558 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS]));
Jesse Grossccb13522011-10-25 19:26:31 -0700559 err = PTR_ERR(acts);
560 if (IS_ERR(acts))
561 goto err_flow_free;
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700562
Pravin B Shelare6445712013-10-03 18:16:47 -0700563 err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS],
Simon Horman25cd9ba2014-10-06 05:05:13 -0700564 &flow->key, &acts);
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700565 if (err)
566 goto err_flow_free;
Jesse Grossccb13522011-10-25 19:26:31 -0700567
Jesse Grossf5796682014-10-03 15:35:33 -0700568 rcu_assign_pointer(flow->sf_acts, acts);
569
570 OVS_CB(packet)->egress_tun_info = NULL;
Jesse Grossccb13522011-10-25 19:26:31 -0700571 OVS_CB(packet)->flow = flow;
572 packet->priority = flow->key.phy.priority;
Ansis Atteka39c7caeb2012-11-26 11:24:11 -0800573 packet->mark = flow->key.phy.skb_mark;
Jesse Grossccb13522011-10-25 19:26:31 -0700574
575 rcu_read_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800576 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -0700577 err = -ENODEV;
578 if (!dp)
579 goto err_unlock;
580
Pravin B Shelar83c8df22014-09-15 19:20:31 -0700581 input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port);
582 if (!input_vport)
583 input_vport = ovs_vport_rcu(dp, OVSP_LOCAL);
584
585 if (!input_vport)
586 goto err_unlock;
587
588 OVS_CB(packet)->input_vport = input_vport;
589
Jesse Grossccb13522011-10-25 19:26:31 -0700590 local_bh_disable();
Pravin B Shelar2ff3e4e2014-09-15 19:15:28 -0700591 err = ovs_execute_actions(dp, packet, &flow->key);
Jesse Grossccb13522011-10-25 19:26:31 -0700592 local_bh_enable();
593 rcu_read_unlock();
594
Andy Zhou03f0d912013-08-07 20:01:00 -0700595 ovs_flow_free(flow, false);
Jesse Grossccb13522011-10-25 19:26:31 -0700596 return err;
597
598err_unlock:
599 rcu_read_unlock();
600err_flow_free:
Andy Zhou03f0d912013-08-07 20:01:00 -0700601 ovs_flow_free(flow, false);
Jesse Grossccb13522011-10-25 19:26:31 -0700602err_kfree_skb:
603 kfree_skb(packet);
604err:
605 return err;
606}
607
608static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
Thomas Grafdded45fc2013-03-29 14:46:47 +0100609 [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
Jesse Grossccb13522011-10-25 19:26:31 -0700610 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
611 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
612};
613
Johannes Berg4534de82013-11-14 17:14:46 +0100614static const struct genl_ops dp_packet_genl_ops[] = {
Jesse Grossccb13522011-10-25 19:26:31 -0700615 { .cmd = OVS_PACKET_CMD_EXECUTE,
616 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
617 .policy = packet_policy,
618 .doit = ovs_packet_cmd_execute
619 }
620};
621
Pravin B Shelar0c200ef2014-05-06 16:44:50 -0700622static struct genl_family dp_packet_genl_family = {
623 .id = GENL_ID_GENERATE,
624 .hdrsize = sizeof(struct ovs_header),
625 .name = OVS_PACKET_FAMILY,
626 .version = OVS_PACKET_VERSION,
627 .maxattr = OVS_PACKET_ATTR_MAX,
628 .netnsok = true,
629 .parallel_ops = true,
630 .ops = dp_packet_genl_ops,
631 .n_ops = ARRAY_SIZE(dp_packet_genl_ops),
632};
633
Andy Zhou1bd71162013-10-22 10:42:46 -0700634static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats,
635 struct ovs_dp_megaflow_stats *mega_stats)
Jesse Grossccb13522011-10-25 19:26:31 -0700636{
637 int i;
Jesse Grossccb13522011-10-25 19:26:31 -0700638
Andy Zhou1bd71162013-10-22 10:42:46 -0700639 memset(mega_stats, 0, sizeof(*mega_stats));
640
Pravin B Shelarb637e492013-10-04 00:14:23 -0700641 stats->n_flows = ovs_flow_tbl_count(&dp->table);
Andy Zhou1bd71162013-10-22 10:42:46 -0700642 mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table);
Jesse Grossccb13522011-10-25 19:26:31 -0700643
644 stats->n_hit = stats->n_missed = stats->n_lost = 0;
Andy Zhou1bd71162013-10-22 10:42:46 -0700645
Jesse Grossccb13522011-10-25 19:26:31 -0700646 for_each_possible_cpu(i) {
647 const struct dp_stats_percpu *percpu_stats;
648 struct dp_stats_percpu local_stats;
649 unsigned int start;
650
651 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
652
653 do {
Eric W. Biederman57a77442014-03-13 21:26:42 -0700654 start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
Jesse Grossccb13522011-10-25 19:26:31 -0700655 local_stats = *percpu_stats;
Eric W. Biederman57a77442014-03-13 21:26:42 -0700656 } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start));
Jesse Grossccb13522011-10-25 19:26:31 -0700657
658 stats->n_hit += local_stats.n_hit;
659 stats->n_missed += local_stats.n_missed;
660 stats->n_lost += local_stats.n_lost;
Andy Zhou1bd71162013-10-22 10:42:46 -0700661 mega_stats->n_mask_hit += local_stats.n_mask_hit;
Jesse Grossccb13522011-10-25 19:26:31 -0700662 }
663}
664
Thomas Grafc3ff8cf2013-03-29 14:46:49 +0100665static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)
666{
667 return NLMSG_ALIGN(sizeof(struct ovs_header))
668 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */
Andy Zhou03f0d912013-08-07 20:01:00 -0700669 + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */
Thomas Grafc3ff8cf2013-03-29 14:46:49 +0100670 + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
671 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
672 + nla_total_size(8) /* OVS_FLOW_ATTR_USED */
673 + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */
674}
675
Jarno Rajahalmebb6f9a72014-05-05 11:32:17 -0700676/* Called with ovs_mutex or RCU read lock. */
Joe Stringerca7105f2014-09-08 13:09:37 -0700677static int ovs_flow_cmd_fill_match(const struct sw_flow *flow,
678 struct sk_buff *skb)
Jesse Grossccb13522011-10-25 19:26:31 -0700679{
Jesse Grossccb13522011-10-25 19:26:31 -0700680 struct nlattr *nla;
Jesse Grossccb13522011-10-25 19:26:31 -0700681 int err;
682
Andy Zhou03f0d912013-08-07 20:01:00 -0700683 /* Fill flow key. */
Jesse Grossccb13522011-10-25 19:26:31 -0700684 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
685 if (!nla)
Joe Stringerca7105f2014-09-08 13:09:37 -0700686 return -EMSGSIZE;
Andy Zhou03f0d912013-08-07 20:01:00 -0700687
Pravin B Shelare6445712013-10-03 18:16:47 -0700688 err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb);
Jesse Grossccb13522011-10-25 19:26:31 -0700689 if (err)
Joe Stringerca7105f2014-09-08 13:09:37 -0700690 return err;
691
Jesse Grossccb13522011-10-25 19:26:31 -0700692 nla_nest_end(skb, nla);
693
Joe Stringerca7105f2014-09-08 13:09:37 -0700694 /* Fill flow mask. */
Andy Zhou03f0d912013-08-07 20:01:00 -0700695 nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK);
696 if (!nla)
Joe Stringerca7105f2014-09-08 13:09:37 -0700697 return -EMSGSIZE;
Andy Zhou03f0d912013-08-07 20:01:00 -0700698
Pravin B Shelare6445712013-10-03 18:16:47 -0700699 err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb);
Andy Zhou03f0d912013-08-07 20:01:00 -0700700 if (err)
Joe Stringerca7105f2014-09-08 13:09:37 -0700701 return err;
Andy Zhou03f0d912013-08-07 20:01:00 -0700702
703 nla_nest_end(skb, nla);
Joe Stringerca7105f2014-09-08 13:09:37 -0700704 return 0;
705}
706
707/* Called with ovs_mutex or RCU read lock. */
708static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow,
709 struct sk_buff *skb)
710{
711 struct ovs_flow_stats stats;
712 __be16 tcp_flags;
713 unsigned long used;
Andy Zhou03f0d912013-08-07 20:01:00 -0700714
Pravin B Shelare298e502013-10-29 17:22:21 -0700715 ovs_flow_stats_get(flow, &stats, &used, &tcp_flags);
Jarno Rajahalme0e9796b2014-05-05 14:28:07 -0700716
David S. Miller028d6a62012-03-29 23:20:48 -0400717 if (used &&
718 nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used)))
Joe Stringerca7105f2014-09-08 13:09:37 -0700719 return -EMSGSIZE;
Jesse Grossccb13522011-10-25 19:26:31 -0700720
David S. Miller028d6a62012-03-29 23:20:48 -0400721 if (stats.n_packets &&
Pravin B Shelare298e502013-10-29 17:22:21 -0700722 nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats))
Joe Stringerca7105f2014-09-08 13:09:37 -0700723 return -EMSGSIZE;
Jesse Grossccb13522011-10-25 19:26:31 -0700724
Pravin B Shelare298e502013-10-29 17:22:21 -0700725 if ((u8)ntohs(tcp_flags) &&
726 nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags)))
Joe Stringerca7105f2014-09-08 13:09:37 -0700727 return -EMSGSIZE;
728
729 return 0;
730}
731
732/* Called with ovs_mutex or RCU read lock. */
733static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow,
734 struct sk_buff *skb, int skb_orig_len)
735{
736 struct nlattr *start;
737 int err;
Jesse Grossccb13522011-10-25 19:26:31 -0700738
739 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
740 * this is the first flow to be dumped into 'skb'. This is unusual for
741 * Netlink but individual action lists can be longer than
742 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
743 * The userspace caller can always fetch the actions separately if it
744 * really wants them. (Most userspace callers in fact don't care.)
745 *
746 * This can only fail for dump operations because the skb is always
747 * properly sized for single flows.
748 */
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700749 start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS);
750 if (start) {
Pravin B Shelard57170b2013-07-30 15:39:39 -0700751 const struct sw_flow_actions *sf_acts;
752
Jesse Gross663efa32013-12-03 10:58:53 -0800753 sf_acts = rcu_dereference_ovsl(flow->sf_acts);
Pravin B Shelare6445712013-10-03 18:16:47 -0700754 err = ovs_nla_put_actions(sf_acts->actions,
755 sf_acts->actions_len, skb);
Jarno Rajahalme0e9796b2014-05-05 14:28:07 -0700756
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700757 if (!err)
758 nla_nest_end(skb, start);
759 else {
760 if (skb_orig_len)
Joe Stringerca7105f2014-09-08 13:09:37 -0700761 return err;
Pravin B Shelar74f84a52013-06-17 17:50:12 -0700762
763 nla_nest_cancel(skb, start);
764 }
Joe Stringerca7105f2014-09-08 13:09:37 -0700765 } else if (skb_orig_len) {
766 return -EMSGSIZE;
767 }
768
769 return 0;
770}
771
772/* Called with ovs_mutex or RCU read lock. */
773static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex,
774 struct sk_buff *skb, u32 portid,
775 u32 seq, u32 flags, u8 cmd)
776{
777 const int skb_orig_len = skb->len;
778 struct ovs_header *ovs_header;
779 int err;
780
781 ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family,
782 flags, cmd);
783 if (!ovs_header)
784 return -EMSGSIZE;
785
786 ovs_header->dp_ifindex = dp_ifindex;
787
788 err = ovs_flow_cmd_fill_match(flow, skb);
789 if (err)
790 goto error;
791
792 err = ovs_flow_cmd_fill_stats(flow, skb);
793 if (err)
794 goto error;
795
796 err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len);
797 if (err)
798 goto error;
Jesse Grossccb13522011-10-25 19:26:31 -0700799
800 return genlmsg_end(skb, ovs_header);
801
Jesse Grossccb13522011-10-25 19:26:31 -0700802error:
803 genlmsg_cancel(skb, ovs_header);
804 return err;
805}
806
Jarno Rajahalme0e9796b2014-05-05 14:28:07 -0700807/* May not be called with RCU read lock. */
808static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts,
Jarno Rajahalmefb5d1e92014-05-05 13:13:14 -0700809 struct genl_info *info,
810 bool always)
Jesse Grossccb13522011-10-25 19:26:31 -0700811{
Jarno Rajahalmefb5d1e92014-05-05 13:13:14 -0700812 struct sk_buff *skb;
Jesse Grossccb13522011-10-25 19:26:31 -0700813
Samuel Gauthier9b67aa42014-09-18 10:31:04 +0200814 if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0))
Jarno Rajahalmefb5d1e92014-05-05 13:13:14 -0700815 return NULL;
816
Jarno Rajahalme0e9796b2014-05-05 14:28:07 -0700817 skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL);
Jarno Rajahalmefb5d1e92014-05-05 13:13:14 -0700818 if (!skb)
819 return ERR_PTR(-ENOMEM);
820
821 return skb;
Jesse Grossccb13522011-10-25 19:26:31 -0700822}
823
Jarno Rajahalme0e9796b2014-05-05 14:28:07 -0700824/* Called with ovs_mutex. */
825static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow,
826 int dp_ifindex,
827 struct genl_info *info, u8 cmd,
828 bool always)
Jesse Grossccb13522011-10-25 19:26:31 -0700829{
830 struct sk_buff *skb;
831 int retval;
832
Jarno Rajahalme0e9796b2014-05-05 14:28:07 -0700833 skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info,
834 always);
Himangi Saraogid0e992a2014-07-27 12:37:46 +0530835 if (IS_ERR_OR_NULL(skb))
Jarno Rajahalmefb5d1e92014-05-05 13:13:14 -0700836 return skb;
Jesse Grossccb13522011-10-25 19:26:31 -0700837
Jarno Rajahalme0e9796b2014-05-05 14:28:07 -0700838 retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb,
839 info->snd_portid, info->snd_seq, 0,
840 cmd);
Jesse Grossccb13522011-10-25 19:26:31 -0700841 BUG_ON(retval < 0);
842 return skb;
843}
844
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700845static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info)
Jesse Grossccb13522011-10-25 19:26:31 -0700846{
847 struct nlattr **a = info->attrs;
848 struct ovs_header *ovs_header = info->userhdr;
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700849 struct sw_flow *flow, *new_flow;
Andy Zhou03f0d912013-08-07 20:01:00 -0700850 struct sw_flow_mask mask;
Jesse Grossccb13522011-10-25 19:26:31 -0700851 struct sk_buff *reply;
852 struct datapath *dp;
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700853 struct sw_flow_actions *acts;
854 struct sw_flow_match match;
855 int error;
856
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700857 /* Must have key and actions. */
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700858 error = -EINVAL;
Jesse Gross426cda52014-10-06 05:08:38 -0700859 if (!a[OVS_FLOW_ATTR_KEY]) {
860 OVS_NLERR("Flow key attribute not present in new flow.\n");
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700861 goto error;
Jesse Gross426cda52014-10-06 05:08:38 -0700862 }
863 if (!a[OVS_FLOW_ATTR_ACTIONS]) {
864 OVS_NLERR("Flow actions attribute not present in new flow.\n");
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700865 goto error;
Jesse Gross426cda52014-10-06 05:08:38 -0700866 }
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700867
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700868 /* Most of the time we need to allocate a new flow, do it before
869 * locking.
870 */
871 new_flow = ovs_flow_alloc();
872 if (IS_ERR(new_flow)) {
873 error = PTR_ERR(new_flow);
874 goto error;
875 }
876
877 /* Extract key. */
878 ovs_match_init(&match, &new_flow->unmasked_key, &mask);
879 error = ovs_nla_get_match(&match,
880 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
881 if (error)
882 goto err_kfree_flow;
883
884 ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask);
885
886 /* Validate actions. */
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700887 acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));
888 error = PTR_ERR(acts);
889 if (IS_ERR(acts))
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700890 goto err_kfree_flow;
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700891
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700892 error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key,
Simon Horman25cd9ba2014-10-06 05:05:13 -0700893 &acts);
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700894 if (error) {
895 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700896 goto err_kfree_acts;
897 }
898
899 reply = ovs_flow_cmd_alloc_info(acts, info, false);
900 if (IS_ERR(reply)) {
901 error = PTR_ERR(reply);
902 goto err_kfree_acts;
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700903 }
904
905 ovs_lock();
906 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700907 if (unlikely(!dp)) {
908 error = -ENODEV;
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700909 goto err_unlock_ovs;
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700910 }
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700911 /* Check if this is a duplicate flow */
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700912 flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key);
913 if (likely(!flow)) {
914 rcu_assign_pointer(new_flow->sf_acts, acts);
915
916 /* Put flow in bucket. */
917 error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask);
918 if (unlikely(error)) {
919 acts = NULL;
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700920 goto err_unlock_ovs;
921 }
922
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700923 if (unlikely(reply)) {
924 error = ovs_flow_cmd_fill_info(new_flow,
925 ovs_header->dp_ifindex,
926 reply, info->snd_portid,
927 info->snd_seq, 0,
928 OVS_FLOW_CMD_NEW);
929 BUG_ON(error < 0);
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700930 }
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700931 ovs_unlock();
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700932 } else {
933 struct sw_flow_actions *old_acts;
934
935 /* Bail out if we're not allowed to modify an existing flow.
936 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
937 * because Generic Netlink treats the latter as a dump
938 * request. We also accept NLM_F_EXCL in case that bug ever
939 * gets fixed.
940 */
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700941 if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE
942 | NLM_F_EXCL))) {
943 error = -EEXIST;
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700944 goto err_unlock_ovs;
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700945 }
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700946 /* The unmasked key has to be the same for flow updates. */
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700947 if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) {
Alex Wang4a46b242014-06-30 20:30:29 -0700948 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
949 if (!flow) {
950 error = -ENOENT;
951 goto err_unlock_ovs;
952 }
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700953 }
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700954 /* Update actions. */
955 old_acts = ovsl_dereference(flow->sf_acts);
956 rcu_assign_pointer(flow->sf_acts, acts);
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700957
958 if (unlikely(reply)) {
959 error = ovs_flow_cmd_fill_info(flow,
960 ovs_header->dp_ifindex,
961 reply, info->snd_portid,
962 info->snd_seq, 0,
963 OVS_FLOW_CMD_NEW);
964 BUG_ON(error < 0);
965 }
966 ovs_unlock();
967
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700968 ovs_nla_free_flow_actions(old_acts);
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700969 ovs_flow_free(new_flow, false);
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700970 }
971
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700972 if (reply)
973 ovs_notify(&dp_flow_genl_family, reply, info);
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700974 return 0;
975
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700976err_unlock_ovs:
977 ovs_unlock();
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700978 kfree_skb(reply);
979err_kfree_acts:
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700980 kfree(acts);
Jarno Rajahalme893f1392014-05-05 15:22:25 -0700981err_kfree_flow:
982 ovs_flow_free(new_flow, false);
Jarno Rajahalme37bdc872014-05-05 14:53:51 -0700983error:
984 return error;
985}
986
Jesse Gross6b205b22014-10-03 15:35:32 -0700987static struct sw_flow_actions *get_flow_actions(const struct nlattr *a,
988 const struct sw_flow_key *key,
989 const struct sw_flow_mask *mask)
990{
991 struct sw_flow_actions *acts;
992 struct sw_flow_key masked_key;
993 int error;
994
995 acts = ovs_nla_alloc_flow_actions(nla_len(a));
996 if (IS_ERR(acts))
997 return acts;
998
999 ovs_flow_mask_key(&masked_key, key, mask);
Simon Horman25cd9ba2014-10-06 05:05:13 -07001000 error = ovs_nla_copy_actions(a, &masked_key, &acts);
Jesse Gross6b205b22014-10-03 15:35:32 -07001001 if (error) {
1002 OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
1003 kfree(acts);
1004 return ERR_PTR(error);
1005 }
1006
1007 return acts;
1008}
1009
Jarno Rajahalme37bdc872014-05-05 14:53:51 -07001010static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info)
1011{
1012 struct nlattr **a = info->attrs;
1013 struct ovs_header *ovs_header = info->userhdr;
Jesse Gross6b205b22014-10-03 15:35:32 -07001014 struct sw_flow_key key;
Jarno Rajahalme37bdc872014-05-05 14:53:51 -07001015 struct sw_flow *flow;
1016 struct sw_flow_mask mask;
1017 struct sk_buff *reply = NULL;
1018 struct datapath *dp;
Jarno Rajahalme893f1392014-05-05 15:22:25 -07001019 struct sw_flow_actions *old_acts = NULL, *acts = NULL;
Andy Zhou03f0d912013-08-07 20:01:00 -07001020 struct sw_flow_match match;
Jesse Grossccb13522011-10-25 19:26:31 -07001021 int error;
Jesse Grossccb13522011-10-25 19:26:31 -07001022
1023 /* Extract key. */
1024 error = -EINVAL;
Jesse Gross426cda52014-10-06 05:08:38 -07001025 if (!a[OVS_FLOW_ATTR_KEY]) {
1026 OVS_NLERR("Flow key attribute not present in set flow.\n");
Jesse Grossccb13522011-10-25 19:26:31 -07001027 goto error;
Jesse Gross426cda52014-10-06 05:08:38 -07001028 }
Andy Zhou03f0d912013-08-07 20:01:00 -07001029
1030 ovs_match_init(&match, &key, &mask);
Jarno Rajahalme23dabf82014-03-27 12:35:23 -07001031 error = ovs_nla_get_match(&match,
Pravin B Shelare6445712013-10-03 18:16:47 -07001032 a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
Jesse Grossccb13522011-10-25 19:26:31 -07001033 if (error)
1034 goto error;
1035
1036 /* Validate actions. */
1037 if (a[OVS_FLOW_ATTR_ACTIONS]) {
Jesse Gross6b205b22014-10-03 15:35:32 -07001038 acts = get_flow_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, &mask);
1039 if (IS_ERR(acts)) {
1040 error = PTR_ERR(acts);
Jesse Grossccb13522011-10-25 19:26:31 -07001041 goto error;
Jarno Rajahalme893f1392014-05-05 15:22:25 -07001042 }
1043 }
1044
1045 /* Can allocate before locking if have acts. */
1046 if (acts) {
1047 reply = ovs_flow_cmd_alloc_info(acts, info, false);
1048 if (IS_ERR(reply)) {
1049 error = PTR_ERR(reply);
1050 goto err_kfree_acts;
Andy Zhou03f0d912013-08-07 20:01:00 -07001051 }
Jesse Grossccb13522011-10-25 19:26:31 -07001052 }
1053
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001054 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001055 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Jarno Rajahalme893f1392014-05-05 15:22:25 -07001056 if (unlikely(!dp)) {
1057 error = -ENODEV;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001058 goto err_unlock_ovs;
Jarno Rajahalme893f1392014-05-05 15:22:25 -07001059 }
Jarno Rajahalme37bdc872014-05-05 14:53:51 -07001060 /* Check that the flow exists. */
Alex Wang4a46b242014-06-30 20:30:29 -07001061 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
Jarno Rajahalme893f1392014-05-05 15:22:25 -07001062 if (unlikely(!flow)) {
1063 error = -ENOENT;
Jarno Rajahalme37bdc872014-05-05 14:53:51 -07001064 goto err_unlock_ovs;
Jarno Rajahalme893f1392014-05-05 15:22:25 -07001065 }
Alex Wang4a46b242014-06-30 20:30:29 -07001066
Jarno Rajahalme37bdc872014-05-05 14:53:51 -07001067 /* Update actions, if present. */
Jarno Rajahalme893f1392014-05-05 15:22:25 -07001068 if (likely(acts)) {
Jarno Rajahalme37bdc872014-05-05 14:53:51 -07001069 old_acts = ovsl_dereference(flow->sf_acts);
Jesse Grossccb13522011-10-25 19:26:31 -07001070 rcu_assign_pointer(flow->sf_acts, acts);
Jarno Rajahalme893f1392014-05-05 15:22:25 -07001071
1072 if (unlikely(reply)) {
1073 error = ovs_flow_cmd_fill_info(flow,
1074 ovs_header->dp_ifindex,
1075 reply, info->snd_portid,
1076 info->snd_seq, 0,
1077 OVS_FLOW_CMD_NEW);
1078 BUG_ON(error < 0);
1079 }
1080 } else {
1081 /* Could not alloc without acts before locking. */
1082 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex,
1083 info, OVS_FLOW_CMD_NEW, false);
1084 if (unlikely(IS_ERR(reply))) {
1085 error = PTR_ERR(reply);
1086 goto err_unlock_ovs;
1087 }
Jesse Grossccb13522011-10-25 19:26:31 -07001088 }
Jarno Rajahalme37bdc872014-05-05 14:53:51 -07001089
Jarno Rajahalme37bdc872014-05-05 14:53:51 -07001090 /* Clear stats. */
1091 if (a[OVS_FLOW_ATTR_CLEAR])
1092 ovs_flow_stats_clear(flow);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001093 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001094
Jarno Rajahalme893f1392014-05-05 15:22:25 -07001095 if (reply)
1096 ovs_notify(&dp_flow_genl_family, reply, info);
1097 if (old_acts)
1098 ovs_nla_free_flow_actions(old_acts);
Jarno Rajahalmefb5d1e92014-05-05 13:13:14 -07001099
Jesse Grossccb13522011-10-25 19:26:31 -07001100 return 0;
1101
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001102err_unlock_ovs:
1103 ovs_unlock();
Jarno Rajahalme893f1392014-05-05 15:22:25 -07001104 kfree_skb(reply);
1105err_kfree_acts:
Pravin B Shelar74f84a52013-06-17 17:50:12 -07001106 kfree(acts);
Jesse Grossccb13522011-10-25 19:26:31 -07001107error:
1108 return error;
1109}
1110
1111static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
1112{
1113 struct nlattr **a = info->attrs;
1114 struct ovs_header *ovs_header = info->userhdr;
1115 struct sw_flow_key key;
1116 struct sk_buff *reply;
1117 struct sw_flow *flow;
1118 struct datapath *dp;
Andy Zhou03f0d912013-08-07 20:01:00 -07001119 struct sw_flow_match match;
Jesse Grossccb13522011-10-25 19:26:31 -07001120 int err;
Jesse Grossccb13522011-10-25 19:26:31 -07001121
Andy Zhou03f0d912013-08-07 20:01:00 -07001122 if (!a[OVS_FLOW_ATTR_KEY]) {
1123 OVS_NLERR("Flow get message rejected, Key attribute missing.\n");
Jesse Grossccb13522011-10-25 19:26:31 -07001124 return -EINVAL;
Andy Zhou03f0d912013-08-07 20:01:00 -07001125 }
1126
1127 ovs_match_init(&match, &key, NULL);
Jarno Rajahalme23dabf82014-03-27 12:35:23 -07001128 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
Jesse Grossccb13522011-10-25 19:26:31 -07001129 if (err)
1130 return err;
1131
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001132 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001133 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001134 if (!dp) {
1135 err = -ENODEV;
1136 goto unlock;
1137 }
Jesse Grossccb13522011-10-25 19:26:31 -07001138
Alex Wang4a46b242014-06-30 20:30:29 -07001139 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
1140 if (!flow) {
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001141 err = -ENOENT;
1142 goto unlock;
1143 }
Jesse Grossccb13522011-10-25 19:26:31 -07001144
Jarno Rajahalme0e9796b2014-05-05 14:28:07 -07001145 reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info,
1146 OVS_FLOW_CMD_NEW, true);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001147 if (IS_ERR(reply)) {
1148 err = PTR_ERR(reply);
1149 goto unlock;
1150 }
Jesse Grossccb13522011-10-25 19:26:31 -07001151
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001152 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001153 return genlmsg_reply(reply, info);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001154unlock:
1155 ovs_unlock();
1156 return err;
Jesse Grossccb13522011-10-25 19:26:31 -07001157}
1158
1159static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
1160{
1161 struct nlattr **a = info->attrs;
1162 struct ovs_header *ovs_header = info->userhdr;
1163 struct sw_flow_key key;
1164 struct sk_buff *reply;
1165 struct sw_flow *flow;
1166 struct datapath *dp;
Andy Zhou03f0d912013-08-07 20:01:00 -07001167 struct sw_flow_match match;
Jesse Grossccb13522011-10-25 19:26:31 -07001168 int err;
Jesse Grossccb13522011-10-25 19:26:31 -07001169
Jarno Rajahalmeaed06772014-05-05 14:40:13 -07001170 if (likely(a[OVS_FLOW_ATTR_KEY])) {
1171 ovs_match_init(&match, &key, NULL);
1172 err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);
1173 if (unlikely(err))
1174 return err;
1175 }
1176
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001177 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001178 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Jarno Rajahalmeaed06772014-05-05 14:40:13 -07001179 if (unlikely(!dp)) {
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001180 err = -ENODEV;
1181 goto unlock;
1182 }
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001183
Jarno Rajahalmeaed06772014-05-05 14:40:13 -07001184 if (unlikely(!a[OVS_FLOW_ATTR_KEY])) {
Pravin B Shelarb637e492013-10-04 00:14:23 -07001185 err = ovs_flow_tbl_flush(&dp->table);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001186 goto unlock;
1187 }
Andy Zhou03f0d912013-08-07 20:01:00 -07001188
Alex Wang4a46b242014-06-30 20:30:29 -07001189 flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
1190 if (unlikely(!flow)) {
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001191 err = -ENOENT;
1192 goto unlock;
1193 }
Jesse Grossccb13522011-10-25 19:26:31 -07001194
Pravin B Shelarb637e492013-10-04 00:14:23 -07001195 ovs_flow_tbl_remove(&dp->table, flow);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001196 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001197
Jarno Rajahalmeaed06772014-05-05 14:40:13 -07001198 reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts,
1199 info, false);
1200 if (likely(reply)) {
1201 if (likely(!IS_ERR(reply))) {
1202 rcu_read_lock(); /*To keep RCU checker happy. */
1203 err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex,
1204 reply, info->snd_portid,
1205 info->snd_seq, 0,
1206 OVS_FLOW_CMD_DEL);
1207 rcu_read_unlock();
1208 BUG_ON(err < 0);
1209
1210 ovs_notify(&dp_flow_genl_family, reply, info);
1211 } else {
1212 netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply));
1213 }
1214 }
1215
1216 ovs_flow_free(flow, true);
Jesse Grossccb13522011-10-25 19:26:31 -07001217 return 0;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001218unlock:
1219 ovs_unlock();
1220 return err;
Jesse Grossccb13522011-10-25 19:26:31 -07001221}
1222
1223static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1224{
1225 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
Pravin B Shelarb637e492013-10-04 00:14:23 -07001226 struct table_instance *ti;
Jesse Grossccb13522011-10-25 19:26:31 -07001227 struct datapath *dp;
Jesse Grossccb13522011-10-25 19:26:31 -07001228
Pravin B Shelard57170b2013-07-30 15:39:39 -07001229 rcu_read_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001230 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001231 if (!dp) {
Pravin B Shelard57170b2013-07-30 15:39:39 -07001232 rcu_read_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001233 return -ENODEV;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001234 }
Jesse Grossccb13522011-10-25 19:26:31 -07001235
Pravin B Shelarb637e492013-10-04 00:14:23 -07001236 ti = rcu_dereference(dp->table.ti);
Jesse Grossccb13522011-10-25 19:26:31 -07001237 for (;;) {
1238 struct sw_flow *flow;
1239 u32 bucket, obj;
1240
1241 bucket = cb->args[0];
1242 obj = cb->args[1];
Pravin B Shelarb637e492013-10-04 00:14:23 -07001243 flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj);
Jesse Grossccb13522011-10-25 19:26:31 -07001244 if (!flow)
1245 break;
1246
Jarno Rajahalme0e9796b2014-05-05 14:28:07 -07001247 if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001248 NETLINK_CB(cb->skb).portid,
Jesse Grossccb13522011-10-25 19:26:31 -07001249 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1250 OVS_FLOW_CMD_NEW) < 0)
1251 break;
1252
1253 cb->args[0] = bucket;
1254 cb->args[1] = obj;
1255 }
Pravin B Shelard57170b2013-07-30 15:39:39 -07001256 rcu_read_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001257 return skb->len;
1258}
1259
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07001260static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
1261 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
1262 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
1263 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
1264};
1265
stephen hemminger48e48a72014-07-16 11:25:52 -07001266static const struct genl_ops dp_flow_genl_ops[] = {
Jesse Grossccb13522011-10-25 19:26:31 -07001267 { .cmd = OVS_FLOW_CMD_NEW,
1268 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1269 .policy = flow_policy,
Jarno Rajahalme37bdc872014-05-05 14:53:51 -07001270 .doit = ovs_flow_cmd_new
Jesse Grossccb13522011-10-25 19:26:31 -07001271 },
1272 { .cmd = OVS_FLOW_CMD_DEL,
1273 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1274 .policy = flow_policy,
1275 .doit = ovs_flow_cmd_del
1276 },
1277 { .cmd = OVS_FLOW_CMD_GET,
1278 .flags = 0, /* OK for unprivileged users. */
1279 .policy = flow_policy,
1280 .doit = ovs_flow_cmd_get,
1281 .dumpit = ovs_flow_cmd_dump
1282 },
1283 { .cmd = OVS_FLOW_CMD_SET,
1284 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1285 .policy = flow_policy,
Jarno Rajahalme37bdc872014-05-05 14:53:51 -07001286 .doit = ovs_flow_cmd_set,
Jesse Grossccb13522011-10-25 19:26:31 -07001287 },
1288};
1289
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07001290static struct genl_family dp_flow_genl_family = {
Jesse Grossccb13522011-10-25 19:26:31 -07001291 .id = GENL_ID_GENERATE,
1292 .hdrsize = sizeof(struct ovs_header),
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07001293 .name = OVS_FLOW_FAMILY,
1294 .version = OVS_FLOW_VERSION,
1295 .maxattr = OVS_FLOW_ATTR_MAX,
Pravin B Shelar3a4e0d62013-04-23 07:48:48 +00001296 .netnsok = true,
1297 .parallel_ops = true,
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07001298 .ops = dp_flow_genl_ops,
1299 .n_ops = ARRAY_SIZE(dp_flow_genl_ops),
1300 .mcgrps = &ovs_dp_flow_multicast_group,
1301 .n_mcgrps = 1,
Jesse Grossccb13522011-10-25 19:26:31 -07001302};
1303
Thomas Grafc3ff8cf2013-03-29 14:46:49 +01001304static size_t ovs_dp_cmd_msg_size(void)
1305{
1306 size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header));
1307
1308 msgsize += nla_total_size(IFNAMSIZ);
1309 msgsize += nla_total_size(sizeof(struct ovs_dp_stats));
Andy Zhou1bd71162013-10-22 10:42:46 -07001310 msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats));
Daniele Di Proietto45fb9c32014-01-23 10:47:35 -08001311 msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */
Thomas Grafc3ff8cf2013-03-29 14:46:49 +01001312
1313 return msgsize;
1314}
1315
Jarno Rajahalmebb6f9a72014-05-05 11:32:17 -07001316/* Called with ovs_mutex or RCU read lock. */
Jesse Grossccb13522011-10-25 19:26:31 -07001317static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001318 u32 portid, u32 seq, u32 flags, u8 cmd)
Jesse Grossccb13522011-10-25 19:26:31 -07001319{
1320 struct ovs_header *ovs_header;
1321 struct ovs_dp_stats dp_stats;
Andy Zhou1bd71162013-10-22 10:42:46 -07001322 struct ovs_dp_megaflow_stats dp_megaflow_stats;
Jesse Grossccb13522011-10-25 19:26:31 -07001323 int err;
1324
Eric W. Biederman15e47302012-09-07 20:12:54 +00001325 ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
Jesse Grossccb13522011-10-25 19:26:31 -07001326 flags, cmd);
1327 if (!ovs_header)
1328 goto error;
1329
1330 ovs_header->dp_ifindex = get_dpifindex(dp);
1331
Jesse Grossccb13522011-10-25 19:26:31 -07001332 err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
Jesse Grossccb13522011-10-25 19:26:31 -07001333 if (err)
1334 goto nla_put_failure;
1335
Andy Zhou1bd71162013-10-22 10:42:46 -07001336 get_dp_stats(dp, &dp_stats, &dp_megaflow_stats);
1337 if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats),
1338 &dp_stats))
1339 goto nla_put_failure;
1340
1341 if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS,
1342 sizeof(struct ovs_dp_megaflow_stats),
1343 &dp_megaflow_stats))
David S. Miller028d6a62012-03-29 23:20:48 -04001344 goto nla_put_failure;
Jesse Grossccb13522011-10-25 19:26:31 -07001345
Thomas Graf43d4be92013-12-13 15:22:18 +01001346 if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features))
1347 goto nla_put_failure;
1348
Jesse Grossccb13522011-10-25 19:26:31 -07001349 return genlmsg_end(skb, ovs_header);
1350
1351nla_put_failure:
1352 genlmsg_cancel(skb, ovs_header);
1353error:
1354 return -EMSGSIZE;
1355}
1356
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001357static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info)
Jesse Grossccb13522011-10-25 19:26:31 -07001358{
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001359 return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL);
Jesse Grossccb13522011-10-25 19:26:31 -07001360}
1361
Jarno Rajahalmebb6f9a72014-05-05 11:32:17 -07001362/* Called with rcu_read_lock or ovs_mutex. */
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001363static struct datapath *lookup_datapath(struct net *net,
1364 struct ovs_header *ovs_header,
Jesse Grossccb13522011-10-25 19:26:31 -07001365 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1366{
1367 struct datapath *dp;
1368
1369 if (!a[OVS_DP_ATTR_NAME])
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001370 dp = get_dp(net, ovs_header->dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -07001371 else {
1372 struct vport *vport;
1373
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001374 vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
Jesse Grossccb13522011-10-25 19:26:31 -07001375 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
Jesse Grossccb13522011-10-25 19:26:31 -07001376 }
1377 return dp ? dp : ERR_PTR(-ENODEV);
1378}
1379
Thomas Graf44da5ae2013-12-13 15:22:19 +01001380static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info)
1381{
1382 struct datapath *dp;
1383
1384 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
Jiri Pirko3c7eacf2014-02-14 11:42:36 +01001385 if (IS_ERR(dp))
Thomas Graf44da5ae2013-12-13 15:22:19 +01001386 return;
1387
1388 WARN(dp->user_features, "Dropping previously announced user features\n");
1389 dp->user_features = 0;
1390}
1391
Thomas Graf43d4be92013-12-13 15:22:18 +01001392static void ovs_dp_change(struct datapath *dp, struct nlattr **a)
1393{
1394 if (a[OVS_DP_ATTR_USER_FEATURES])
1395 dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]);
1396}
1397
Jesse Grossccb13522011-10-25 19:26:31 -07001398static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1399{
1400 struct nlattr **a = info->attrs;
1401 struct vport_parms parms;
1402 struct sk_buff *reply;
1403 struct datapath *dp;
1404 struct vport *vport;
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001405 struct ovs_net *ovs_net;
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001406 int err, i;
Jesse Grossccb13522011-10-25 19:26:31 -07001407
1408 err = -EINVAL;
1409 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1410 goto err;
1411
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001412 reply = ovs_dp_cmd_alloc_info(info);
1413 if (!reply)
1414 return -ENOMEM;
Jesse Grossccb13522011-10-25 19:26:31 -07001415
1416 err = -ENOMEM;
1417 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1418 if (dp == NULL)
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001419 goto err_free_reply;
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001420
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001421 ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
Jesse Grossccb13522011-10-25 19:26:31 -07001422
1423 /* Allocate table. */
Pravin B Shelarb637e492013-10-04 00:14:23 -07001424 err = ovs_flow_tbl_init(&dp->table);
1425 if (err)
Jesse Grossccb13522011-10-25 19:26:31 -07001426 goto err_free_dp;
1427
WANG Cong1c213bd2014-02-13 11:46:28 -08001428 dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu);
Jesse Grossccb13522011-10-25 19:26:31 -07001429 if (!dp->stats_percpu) {
1430 err = -ENOMEM;
1431 goto err_destroy_table;
1432 }
1433
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001434 dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
Pravin B Shelare6445712013-10-03 18:16:47 -07001435 GFP_KERNEL);
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001436 if (!dp->ports) {
1437 err = -ENOMEM;
1438 goto err_destroy_percpu;
1439 }
1440
1441 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
1442 INIT_HLIST_HEAD(&dp->ports[i]);
1443
Jesse Grossccb13522011-10-25 19:26:31 -07001444 /* Set up our datapath device. */
1445 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1446 parms.type = OVS_VPORT_TYPE_INTERNAL;
1447 parms.options = NULL;
1448 parms.dp = dp;
1449 parms.port_no = OVSP_LOCAL;
Alex Wang5cd667b2014-07-17 15:14:13 -07001450 parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID];
Jesse Grossccb13522011-10-25 19:26:31 -07001451
Thomas Graf43d4be92013-12-13 15:22:18 +01001452 ovs_dp_change(dp, a);
1453
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001454 /* So far only local changes have been made, now need the lock. */
1455 ovs_lock();
1456
Jesse Grossccb13522011-10-25 19:26:31 -07001457 vport = new_vport(&parms);
1458 if (IS_ERR(vport)) {
1459 err = PTR_ERR(vport);
1460 if (err == -EBUSY)
1461 err = -EEXIST;
1462
Thomas Graf44da5ae2013-12-13 15:22:19 +01001463 if (err == -EEXIST) {
1464 /* An outdated user space instance that does not understand
1465 * the concept of user_features has attempted to create a new
1466 * datapath and is likely to reuse it. Drop all user features.
1467 */
1468 if (info->genlhdr->version < OVS_DP_VER_FEATURES)
1469 ovs_dp_reset_user_features(skb, info);
1470 }
1471
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001472 goto err_destroy_ports_array;
Jesse Grossccb13522011-10-25 19:26:31 -07001473 }
1474
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001475 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1476 info->snd_seq, 0, OVS_DP_CMD_NEW);
1477 BUG_ON(err < 0);
Jesse Grossccb13522011-10-25 19:26:31 -07001478
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001479 ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
Pravin B Shelar59a35d62013-07-30 15:42:19 -07001480 list_add_tail_rcu(&dp->list_node, &ovs_net->dps);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001481
1482 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001483
Johannes Berg2a94fe42013-11-19 15:19:39 +01001484 ovs_notify(&dp_datapath_genl_family, reply, info);
Jesse Grossccb13522011-10-25 19:26:31 -07001485 return 0;
1486
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001487err_destroy_ports_array:
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001488 ovs_unlock();
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001489 kfree(dp->ports);
Jesse Grossccb13522011-10-25 19:26:31 -07001490err_destroy_percpu:
1491 free_percpu(dp->stats_percpu);
1492err_destroy_table:
Pravin B Shelar9b996e52014-05-06 18:41:20 -07001493 ovs_flow_tbl_destroy(&dp->table);
Jesse Grossccb13522011-10-25 19:26:31 -07001494err_free_dp:
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001495 release_net(ovs_dp_get_net(dp));
Jesse Grossccb13522011-10-25 19:26:31 -07001496 kfree(dp);
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001497err_free_reply:
1498 kfree_skb(reply);
Jesse Grossccb13522011-10-25 19:26:31 -07001499err:
1500 return err;
1501}
1502
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001503/* Called with ovs_mutex. */
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001504static void __dp_destroy(struct datapath *dp)
Jesse Grossccb13522011-10-25 19:26:31 -07001505{
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001506 int i;
Jesse Grossccb13522011-10-25 19:26:31 -07001507
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001508 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
1509 struct vport *vport;
Sasha Levinb67bfe02013-02-27 17:06:00 -08001510 struct hlist_node *n;
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001511
Sasha Levinb67bfe02013-02-27 17:06:00 -08001512 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node)
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001513 if (vport->port_no != OVSP_LOCAL)
1514 ovs_dp_detach_port(vport);
1515 }
Jesse Grossccb13522011-10-25 19:26:31 -07001516
Pravin B Shelar59a35d62013-07-30 15:42:19 -07001517 list_del_rcu(&dp->list_node);
Jesse Grossccb13522011-10-25 19:26:31 -07001518
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001519 /* OVSP_LOCAL is datapath internal port. We need to make sure that
Andy Zhoue80857c2014-01-21 09:31:04 -08001520 * all ports in datapath are destroyed first before freeing datapath.
Jesse Grossccb13522011-10-25 19:26:31 -07001521 */
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001522 ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
Jesse Grossccb13522011-10-25 19:26:31 -07001523
Andy Zhoue80857c2014-01-21 09:31:04 -08001524 /* RCU destroy the flow table */
Jesse Grossccb13522011-10-25 19:26:31 -07001525 call_rcu(&dp->rcu, destroy_dp_rcu);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001526}
1527
1528static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1529{
1530 struct sk_buff *reply;
1531 struct datapath *dp;
1532 int err;
1533
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001534 reply = ovs_dp_cmd_alloc_info(info);
1535 if (!reply)
1536 return -ENOMEM;
1537
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001538 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001539 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
1540 err = PTR_ERR(dp);
1541 if (IS_ERR(dp))
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001542 goto err_unlock_free;
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001543
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001544 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1545 info->snd_seq, 0, OVS_DP_CMD_DEL);
1546 BUG_ON(err < 0);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001547
1548 __dp_destroy(dp);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001549 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001550
Johannes Berg2a94fe42013-11-19 15:19:39 +01001551 ovs_notify(&dp_datapath_genl_family, reply, info);
Jesse Grossccb13522011-10-25 19:26:31 -07001552
1553 return 0;
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001554
1555err_unlock_free:
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001556 ovs_unlock();
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001557 kfree_skb(reply);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001558 return err;
Jesse Grossccb13522011-10-25 19:26:31 -07001559}
1560
1561static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1562{
1563 struct sk_buff *reply;
1564 struct datapath *dp;
1565 int err;
1566
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001567 reply = ovs_dp_cmd_alloc_info(info);
1568 if (!reply)
1569 return -ENOMEM;
1570
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001571 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001572 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001573 err = PTR_ERR(dp);
Jesse Grossccb13522011-10-25 19:26:31 -07001574 if (IS_ERR(dp))
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001575 goto err_unlock_free;
Jesse Grossccb13522011-10-25 19:26:31 -07001576
Thomas Graf43d4be92013-12-13 15:22:18 +01001577 ovs_dp_change(dp, info->attrs);
1578
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001579 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1580 info->snd_seq, 0, OVS_DP_CMD_NEW);
1581 BUG_ON(err < 0);
Jesse Grossccb13522011-10-25 19:26:31 -07001582
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001583 ovs_unlock();
Johannes Berg2a94fe42013-11-19 15:19:39 +01001584 ovs_notify(&dp_datapath_genl_family, reply, info);
Jesse Grossccb13522011-10-25 19:26:31 -07001585
1586 return 0;
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001587
1588err_unlock_free:
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001589 ovs_unlock();
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001590 kfree_skb(reply);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001591 return err;
Jesse Grossccb13522011-10-25 19:26:31 -07001592}
1593
1594static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1595{
1596 struct sk_buff *reply;
1597 struct datapath *dp;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001598 int err;
Jesse Grossccb13522011-10-25 19:26:31 -07001599
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001600 reply = ovs_dp_cmd_alloc_info(info);
1601 if (!reply)
1602 return -ENOMEM;
1603
1604 rcu_read_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001605 dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001606 if (IS_ERR(dp)) {
1607 err = PTR_ERR(dp);
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001608 goto err_unlock_free;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001609 }
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001610 err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
1611 info->snd_seq, 0, OVS_DP_CMD_NEW);
1612 BUG_ON(err < 0);
1613 rcu_read_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001614
Jesse Grossccb13522011-10-25 19:26:31 -07001615 return genlmsg_reply(reply, info);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001616
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001617err_unlock_free:
1618 rcu_read_unlock();
1619 kfree_skb(reply);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001620 return err;
Jesse Grossccb13522011-10-25 19:26:31 -07001621}
1622
1623static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1624{
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001625 struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
Jesse Grossccb13522011-10-25 19:26:31 -07001626 struct datapath *dp;
1627 int skip = cb->args[0];
1628 int i = 0;
1629
Pravin B Shelar59a35d62013-07-30 15:42:19 -07001630 rcu_read_lock();
1631 list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) {
Ben Pfaff77676fd2012-01-17 13:33:39 +00001632 if (i >= skip &&
Eric W. Biederman15e47302012-09-07 20:12:54 +00001633 ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
Jesse Grossccb13522011-10-25 19:26:31 -07001634 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1635 OVS_DP_CMD_NEW) < 0)
1636 break;
1637 i++;
1638 }
Pravin B Shelar59a35d62013-07-30 15:42:19 -07001639 rcu_read_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001640
1641 cb->args[0] = i;
1642
1643 return skb->len;
1644}
1645
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07001646static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1647 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1648 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1649 [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
1650};
1651
stephen hemminger48e48a72014-07-16 11:25:52 -07001652static const struct genl_ops dp_datapath_genl_ops[] = {
Jesse Grossccb13522011-10-25 19:26:31 -07001653 { .cmd = OVS_DP_CMD_NEW,
1654 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1655 .policy = datapath_policy,
1656 .doit = ovs_dp_cmd_new
1657 },
1658 { .cmd = OVS_DP_CMD_DEL,
1659 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1660 .policy = datapath_policy,
1661 .doit = ovs_dp_cmd_del
1662 },
1663 { .cmd = OVS_DP_CMD_GET,
1664 .flags = 0, /* OK for unprivileged users. */
1665 .policy = datapath_policy,
1666 .doit = ovs_dp_cmd_get,
1667 .dumpit = ovs_dp_cmd_dump
1668 },
1669 { .cmd = OVS_DP_CMD_SET,
1670 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1671 .policy = datapath_policy,
1672 .doit = ovs_dp_cmd_set,
1673 },
1674};
1675
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07001676static struct genl_family dp_datapath_genl_family = {
Jesse Grossccb13522011-10-25 19:26:31 -07001677 .id = GENL_ID_GENERATE,
1678 .hdrsize = sizeof(struct ovs_header),
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07001679 .name = OVS_DATAPATH_FAMILY,
1680 .version = OVS_DATAPATH_VERSION,
1681 .maxattr = OVS_DP_ATTR_MAX,
Pravin B Shelar3a4e0d62013-04-23 07:48:48 +00001682 .netnsok = true,
1683 .parallel_ops = true,
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07001684 .ops = dp_datapath_genl_ops,
1685 .n_ops = ARRAY_SIZE(dp_datapath_genl_ops),
1686 .mcgrps = &ovs_dp_datapath_multicast_group,
1687 .n_mcgrps = 1,
Jesse Grossccb13522011-10-25 19:26:31 -07001688};
1689
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001690/* Called with ovs_mutex or RCU read lock. */
Jesse Grossccb13522011-10-25 19:26:31 -07001691static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001692 u32 portid, u32 seq, u32 flags, u8 cmd)
Jesse Grossccb13522011-10-25 19:26:31 -07001693{
1694 struct ovs_header *ovs_header;
1695 struct ovs_vport_stats vport_stats;
1696 int err;
1697
Eric W. Biederman15e47302012-09-07 20:12:54 +00001698 ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
Jesse Grossccb13522011-10-25 19:26:31 -07001699 flags, cmd);
1700 if (!ovs_header)
1701 return -EMSGSIZE;
1702
1703 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1704
David S. Miller028d6a62012-03-29 23:20:48 -04001705 if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
1706 nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
Alex Wang5cd667b2014-07-17 15:14:13 -07001707 nla_put_string(skb, OVS_VPORT_ATTR_NAME,
1708 vport->ops->get_name(vport)))
David S. Miller028d6a62012-03-29 23:20:48 -04001709 goto nla_put_failure;
Jesse Grossccb13522011-10-25 19:26:31 -07001710
1711 ovs_vport_get_stats(vport, &vport_stats);
David S. Miller028d6a62012-03-29 23:20:48 -04001712 if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
1713 &vport_stats))
1714 goto nla_put_failure;
Jesse Grossccb13522011-10-25 19:26:31 -07001715
Alex Wang5cd667b2014-07-17 15:14:13 -07001716 if (ovs_vport_get_upcall_portids(vport, skb))
1717 goto nla_put_failure;
1718
Jesse Grossccb13522011-10-25 19:26:31 -07001719 err = ovs_vport_get_options(vport, skb);
1720 if (err == -EMSGSIZE)
1721 goto error;
1722
1723 return genlmsg_end(skb, ovs_header);
1724
1725nla_put_failure:
1726 err = -EMSGSIZE;
1727error:
1728 genlmsg_cancel(skb, ovs_header);
1729 return err;
1730}
1731
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001732static struct sk_buff *ovs_vport_cmd_alloc_info(void)
1733{
1734 return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1735}
1736
1737/* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
Eric W. Biederman15e47302012-09-07 20:12:54 +00001738struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid,
Jesse Grossccb13522011-10-25 19:26:31 -07001739 u32 seq, u8 cmd)
1740{
1741 struct sk_buff *skb;
1742 int retval;
1743
1744 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1745 if (!skb)
1746 return ERR_PTR(-ENOMEM);
1747
Eric W. Biederman15e47302012-09-07 20:12:54 +00001748 retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd);
Jesse Grossa9341512013-03-26 15:48:38 -07001749 BUG_ON(retval < 0);
1750
Jesse Grossccb13522011-10-25 19:26:31 -07001751 return skb;
1752}
1753
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001754/* Called with ovs_mutex or RCU read lock. */
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001755static struct vport *lookup_vport(struct net *net,
1756 struct ovs_header *ovs_header,
Jesse Grossccb13522011-10-25 19:26:31 -07001757 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1758{
1759 struct datapath *dp;
1760 struct vport *vport;
1761
1762 if (a[OVS_VPORT_ATTR_NAME]) {
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001763 vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
Jesse Grossccb13522011-10-25 19:26:31 -07001764 if (!vport)
1765 return ERR_PTR(-ENODEV);
Ben Pfaff651a68e2012-03-06 15:04:04 -08001766 if (ovs_header->dp_ifindex &&
1767 ovs_header->dp_ifindex != get_dpifindex(vport->dp))
1768 return ERR_PTR(-ENODEV);
Jesse Grossccb13522011-10-25 19:26:31 -07001769 return vport;
1770 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1771 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1772
1773 if (port_no >= DP_MAX_PORTS)
1774 return ERR_PTR(-EFBIG);
1775
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001776 dp = get_dp(net, ovs_header->dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -07001777 if (!dp)
1778 return ERR_PTR(-ENODEV);
1779
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001780 vport = ovs_vport_ovsl_rcu(dp, port_no);
Jesse Grossccb13522011-10-25 19:26:31 -07001781 if (!vport)
Jarno Rajahalme14408db2013-01-09 14:27:35 -08001782 return ERR_PTR(-ENODEV);
Jesse Grossccb13522011-10-25 19:26:31 -07001783 return vport;
1784 } else
1785 return ERR_PTR(-EINVAL);
1786}
1787
1788static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1789{
1790 struct nlattr **a = info->attrs;
1791 struct ovs_header *ovs_header = info->userhdr;
1792 struct vport_parms parms;
1793 struct sk_buff *reply;
1794 struct vport *vport;
1795 struct datapath *dp;
1796 u32 port_no;
1797 int err;
1798
Jesse Grossccb13522011-10-25 19:26:31 -07001799 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1800 !a[OVS_VPORT_ATTR_UPCALL_PID])
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001801 return -EINVAL;
1802
1803 port_no = a[OVS_VPORT_ATTR_PORT_NO]
1804 ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0;
1805 if (port_no >= DP_MAX_PORTS)
1806 return -EFBIG;
1807
1808 reply = ovs_vport_cmd_alloc_info();
1809 if (!reply)
1810 return -ENOMEM;
Jesse Grossccb13522011-10-25 19:26:31 -07001811
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001812 ovs_lock();
Thomas Graf62b9c8d2014-10-22 17:29:06 +02001813restart:
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001814 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
Jesse Grossccb13522011-10-25 19:26:31 -07001815 err = -ENODEV;
1816 if (!dp)
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001817 goto exit_unlock_free;
Jesse Grossccb13522011-10-25 19:26:31 -07001818
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001819 if (port_no) {
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001820 vport = ovs_vport_ovsl(dp, port_no);
Jesse Grossccb13522011-10-25 19:26:31 -07001821 err = -EBUSY;
1822 if (vport)
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001823 goto exit_unlock_free;
Jesse Grossccb13522011-10-25 19:26:31 -07001824 } else {
1825 for (port_no = 1; ; port_no++) {
1826 if (port_no >= DP_MAX_PORTS) {
1827 err = -EFBIG;
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001828 goto exit_unlock_free;
Jesse Grossccb13522011-10-25 19:26:31 -07001829 }
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001830 vport = ovs_vport_ovsl(dp, port_no);
Jesse Grossccb13522011-10-25 19:26:31 -07001831 if (!vport)
1832 break;
1833 }
1834 }
1835
1836 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1837 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1838 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1839 parms.dp = dp;
1840 parms.port_no = port_no;
Alex Wang5cd667b2014-07-17 15:14:13 -07001841 parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID];
Jesse Grossccb13522011-10-25 19:26:31 -07001842
1843 vport = new_vport(&parms);
1844 err = PTR_ERR(vport);
Thomas Graf62b9c8d2014-10-22 17:29:06 +02001845 if (IS_ERR(vport)) {
1846 if (err == -EAGAIN)
1847 goto restart;
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001848 goto exit_unlock_free;
Thomas Graf62b9c8d2014-10-22 17:29:06 +02001849 }
Jesse Grossccb13522011-10-25 19:26:31 -07001850
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001851 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1852 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1853 BUG_ON(err < 0);
1854 ovs_unlock();
Thomas Grafed6611852013-03-29 14:46:50 +01001855
Johannes Berg2a94fe42013-11-19 15:19:39 +01001856 ovs_notify(&dp_vport_genl_family, reply, info);
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001857 return 0;
Jesse Grossccb13522011-10-25 19:26:31 -07001858
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001859exit_unlock_free:
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001860 ovs_unlock();
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001861 kfree_skb(reply);
Jesse Grossccb13522011-10-25 19:26:31 -07001862 return err;
1863}
1864
1865static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1866{
1867 struct nlattr **a = info->attrs;
1868 struct sk_buff *reply;
1869 struct vport *vport;
1870 int err;
1871
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001872 reply = ovs_vport_cmd_alloc_info();
1873 if (!reply)
1874 return -ENOMEM;
1875
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001876 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001877 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
Jesse Grossccb13522011-10-25 19:26:31 -07001878 err = PTR_ERR(vport);
1879 if (IS_ERR(vport))
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001880 goto exit_unlock_free;
Jesse Grossccb13522011-10-25 19:26:31 -07001881
Jesse Grossccb13522011-10-25 19:26:31 -07001882 if (a[OVS_VPORT_ATTR_TYPE] &&
Jesse Grossf44f3402013-05-13 08:15:26 -07001883 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
Jesse Grossccb13522011-10-25 19:26:31 -07001884 err = -EINVAL;
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001885 goto exit_unlock_free;
Jesse Grossa9341512013-03-26 15:48:38 -07001886 }
1887
Jesse Grossf44f3402013-05-13 08:15:26 -07001888 if (a[OVS_VPORT_ATTR_OPTIONS]) {
Jesse Grossccb13522011-10-25 19:26:31 -07001889 err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
Jesse Grossf44f3402013-05-13 08:15:26 -07001890 if (err)
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001891 goto exit_unlock_free;
Jesse Grossf44f3402013-05-13 08:15:26 -07001892 }
Jesse Grossa9341512013-03-26 15:48:38 -07001893
Alex Wang5cd667b2014-07-17 15:14:13 -07001894
1895 if (a[OVS_VPORT_ATTR_UPCALL_PID]) {
1896 struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID];
1897
1898 err = ovs_vport_set_upcall_portids(vport, ids);
1899 if (err)
1900 goto exit_unlock_free;
1901 }
Jesse Grossccb13522011-10-25 19:26:31 -07001902
Jesse Grossa9341512013-03-26 15:48:38 -07001903 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1904 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1905 BUG_ON(err < 0);
Jesse Grossccb13522011-10-25 19:26:31 -07001906
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001907 ovs_unlock();
Johannes Berg2a94fe42013-11-19 15:19:39 +01001908 ovs_notify(&dp_vport_genl_family, reply, info);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001909 return 0;
Jesse Grossccb13522011-10-25 19:26:31 -07001910
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001911exit_unlock_free:
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001912 ovs_unlock();
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001913 kfree_skb(reply);
Jesse Grossccb13522011-10-25 19:26:31 -07001914 return err;
1915}
1916
1917static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1918{
1919 struct nlattr **a = info->attrs;
1920 struct sk_buff *reply;
1921 struct vport *vport;
1922 int err;
1923
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001924 reply = ovs_vport_cmd_alloc_info();
1925 if (!reply)
1926 return -ENOMEM;
1927
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001928 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001929 vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
Jesse Grossccb13522011-10-25 19:26:31 -07001930 err = PTR_ERR(vport);
1931 if (IS_ERR(vport))
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001932 goto exit_unlock_free;
Jesse Grossccb13522011-10-25 19:26:31 -07001933
1934 if (vport->port_no == OVSP_LOCAL) {
1935 err = -EINVAL;
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001936 goto exit_unlock_free;
Jesse Grossccb13522011-10-25 19:26:31 -07001937 }
1938
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001939 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1940 info->snd_seq, 0, OVS_VPORT_CMD_DEL);
1941 BUG_ON(err < 0);
Jesse Grossccb13522011-10-25 19:26:31 -07001942 ovs_dp_detach_port(vport);
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001943 ovs_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -07001944
Johannes Berg2a94fe42013-11-19 15:19:39 +01001945 ovs_notify(&dp_vport_genl_family, reply, info);
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001946 return 0;
Jesse Grossccb13522011-10-25 19:26:31 -07001947
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001948exit_unlock_free:
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07001949 ovs_unlock();
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001950 kfree_skb(reply);
Jesse Grossccb13522011-10-25 19:26:31 -07001951 return err;
1952}
1953
1954static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1955{
1956 struct nlattr **a = info->attrs;
1957 struct ovs_header *ovs_header = info->userhdr;
1958 struct sk_buff *reply;
1959 struct vport *vport;
1960 int err;
1961
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001962 reply = ovs_vport_cmd_alloc_info();
1963 if (!reply)
1964 return -ENOMEM;
1965
Jesse Grossccb13522011-10-25 19:26:31 -07001966 rcu_read_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08001967 vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
Jesse Grossccb13522011-10-25 19:26:31 -07001968 err = PTR_ERR(vport);
1969 if (IS_ERR(vport))
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001970 goto exit_unlock_free;
1971 err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
1972 info->snd_seq, 0, OVS_VPORT_CMD_NEW);
1973 BUG_ON(err < 0);
Jesse Grossccb13522011-10-25 19:26:31 -07001974 rcu_read_unlock();
1975
1976 return genlmsg_reply(reply, info);
1977
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001978exit_unlock_free:
Jesse Grossccb13522011-10-25 19:26:31 -07001979 rcu_read_unlock();
Jarno Rajahalme6093ae92014-05-05 14:13:32 -07001980 kfree_skb(reply);
Jesse Grossccb13522011-10-25 19:26:31 -07001981 return err;
1982}
1983
1984static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1985{
1986 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1987 struct datapath *dp;
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001988 int bucket = cb->args[0], skip = cb->args[1];
1989 int i, j = 0;
Jesse Grossccb13522011-10-25 19:26:31 -07001990
Jesse Grossccb13522011-10-25 19:26:31 -07001991 rcu_read_lock();
Jarno Rajahalme42ee19e2014-02-15 17:42:29 -08001992 dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
1993 if (!dp) {
1994 rcu_read_unlock();
1995 return -ENODEV;
1996 }
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07001997 for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
Jesse Grossccb13522011-10-25 19:26:31 -07001998 struct vport *vport;
1999
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07002000 j = 0;
Sasha Levinb67bfe02013-02-27 17:06:00 -08002001 hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07002002 if (j >= skip &&
2003 ovs_vport_cmd_fill_info(vport, skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00002004 NETLINK_CB(cb->skb).portid,
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07002005 cb->nlh->nlmsg_seq,
2006 NLM_F_MULTI,
2007 OVS_VPORT_CMD_NEW) < 0)
2008 goto out;
Jesse Grossccb13522011-10-25 19:26:31 -07002009
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07002010 j++;
2011 }
2012 skip = 0;
Jesse Grossccb13522011-10-25 19:26:31 -07002013 }
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07002014out:
Jesse Grossccb13522011-10-25 19:26:31 -07002015 rcu_read_unlock();
2016
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07002017 cb->args[0] = i;
2018 cb->args[1] = j;
Jesse Grossccb13522011-10-25 19:26:31 -07002019
Pravin B Shelar15eac2a2012-08-23 12:40:54 -07002020 return skb->len;
Jesse Grossccb13522011-10-25 19:26:31 -07002021}
2022
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07002023static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
2024 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
2025 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
2026 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
2027 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
2028 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
2029 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
2030};
2031
stephen hemminger48e48a72014-07-16 11:25:52 -07002032static const struct genl_ops dp_vport_genl_ops[] = {
Jesse Grossccb13522011-10-25 19:26:31 -07002033 { .cmd = OVS_VPORT_CMD_NEW,
2034 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
2035 .policy = vport_policy,
2036 .doit = ovs_vport_cmd_new
2037 },
2038 { .cmd = OVS_VPORT_CMD_DEL,
2039 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
2040 .policy = vport_policy,
2041 .doit = ovs_vport_cmd_del
2042 },
2043 { .cmd = OVS_VPORT_CMD_GET,
2044 .flags = 0, /* OK for unprivileged users. */
2045 .policy = vport_policy,
2046 .doit = ovs_vport_cmd_get,
2047 .dumpit = ovs_vport_cmd_dump
2048 },
2049 { .cmd = OVS_VPORT_CMD_SET,
2050 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
2051 .policy = vport_policy,
2052 .doit = ovs_vport_cmd_set,
2053 },
2054};
2055
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07002056struct genl_family dp_vport_genl_family = {
2057 .id = GENL_ID_GENERATE,
2058 .hdrsize = sizeof(struct ovs_header),
2059 .name = OVS_VPORT_FAMILY,
2060 .version = OVS_VPORT_VERSION,
2061 .maxattr = OVS_VPORT_ATTR_MAX,
2062 .netnsok = true,
2063 .parallel_ops = true,
2064 .ops = dp_vport_genl_ops,
2065 .n_ops = ARRAY_SIZE(dp_vport_genl_ops),
2066 .mcgrps = &ovs_dp_vport_multicast_group,
2067 .n_mcgrps = 1,
Jesse Grossccb13522011-10-25 19:26:31 -07002068};
2069
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07002070static struct genl_family * const dp_genl_families[] = {
2071 &dp_datapath_genl_family,
2072 &dp_vport_genl_family,
2073 &dp_flow_genl_family,
2074 &dp_packet_genl_family,
Jesse Grossccb13522011-10-25 19:26:31 -07002075};
2076
2077static void dp_unregister_genl(int n_families)
2078{
2079 int i;
2080
2081 for (i = 0; i < n_families; i++)
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07002082 genl_unregister_family(dp_genl_families[i]);
Jesse Grossccb13522011-10-25 19:26:31 -07002083}
2084
2085static int dp_register_genl(void)
2086{
Jesse Grossccb13522011-10-25 19:26:31 -07002087 int err;
2088 int i;
2089
Jesse Grossccb13522011-10-25 19:26:31 -07002090 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
Jesse Grossccb13522011-10-25 19:26:31 -07002091
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07002092 err = genl_register_family(dp_genl_families[i]);
Jesse Grossccb13522011-10-25 19:26:31 -07002093 if (err)
2094 goto error;
Jesse Grossccb13522011-10-25 19:26:31 -07002095 }
2096
2097 return 0;
2098
2099error:
Pravin B Shelar0c200ef2014-05-06 16:44:50 -07002100 dp_unregister_genl(i);
Jesse Grossccb13522011-10-25 19:26:31 -07002101 return err;
2102}
2103
Pravin B Shelar46df7b82012-02-22 19:58:59 -08002104static int __net_init ovs_init_net(struct net *net)
2105{
2106 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
2107
2108 INIT_LIST_HEAD(&ovs_net->dps);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07002109 INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08002110 return 0;
2111}
2112
2113static void __net_exit ovs_exit_net(struct net *net)
2114{
Pravin B Shelar46df7b82012-02-22 19:58:59 -08002115 struct datapath *dp, *dp_next;
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07002116 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08002117
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07002118 ovs_lock();
Pravin B Shelar46df7b82012-02-22 19:58:59 -08002119 list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
2120 __dp_destroy(dp);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -07002121 ovs_unlock();
2122
2123 cancel_work_sync(&ovs_net->dp_notify_work);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08002124}
2125
2126static struct pernet_operations ovs_net_ops = {
2127 .init = ovs_init_net,
2128 .exit = ovs_exit_net,
2129 .id = &ovs_net_id,
2130 .size = sizeof(struct ovs_net),
2131};
2132
Jesse Grossccb13522011-10-25 19:26:31 -07002133static int __init dp_init(void)
2134{
Jesse Grossccb13522011-10-25 19:26:31 -07002135 int err;
2136
YOSHIFUJI Hideaki / 吉藤英明3523b292013-01-09 07:19:55 +00002137 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
Jesse Grossccb13522011-10-25 19:26:31 -07002138
2139 pr_info("Open vSwitch switching datapath\n");
2140
Andy Zhou971427f32014-09-15 19:37:25 -07002141 err = action_fifos_init();
Jesse Grossccb13522011-10-25 19:26:31 -07002142 if (err)
2143 goto error;
2144
Andy Zhou971427f32014-09-15 19:37:25 -07002145 err = ovs_internal_dev_rtnl_link_register();
2146 if (err)
2147 goto error_action_fifos_exit;
2148
Jiri Pirko5b9e7e12014-06-26 09:58:26 +02002149 err = ovs_flow_init();
2150 if (err)
2151 goto error_unreg_rtnl_link;
2152
Jesse Grossccb13522011-10-25 19:26:31 -07002153 err = ovs_vport_init();
2154 if (err)
2155 goto error_flow_exit;
2156
Pravin B Shelar46df7b82012-02-22 19:58:59 -08002157 err = register_pernet_device(&ovs_net_ops);
Jesse Grossccb13522011-10-25 19:26:31 -07002158 if (err)
2159 goto error_vport_exit;
2160
Pravin B Shelar46df7b82012-02-22 19:58:59 -08002161 err = register_netdevice_notifier(&ovs_dp_device_notifier);
2162 if (err)
2163 goto error_netns_exit;
2164
Thomas Graf62b9c8d2014-10-22 17:29:06 +02002165 err = ovs_netdev_init();
2166 if (err)
2167 goto error_unreg_notifier;
2168
Jesse Grossccb13522011-10-25 19:26:31 -07002169 err = dp_register_genl();
2170 if (err < 0)
Thomas Graf62b9c8d2014-10-22 17:29:06 +02002171 goto error_unreg_netdev;
Jesse Grossccb13522011-10-25 19:26:31 -07002172
Jesse Grossccb13522011-10-25 19:26:31 -07002173 return 0;
2174
Thomas Graf62b9c8d2014-10-22 17:29:06 +02002175error_unreg_netdev:
2176 ovs_netdev_exit();
Jesse Grossccb13522011-10-25 19:26:31 -07002177error_unreg_notifier:
2178 unregister_netdevice_notifier(&ovs_dp_device_notifier);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08002179error_netns_exit:
2180 unregister_pernet_device(&ovs_net_ops);
Jesse Grossccb13522011-10-25 19:26:31 -07002181error_vport_exit:
2182 ovs_vport_exit();
2183error_flow_exit:
2184 ovs_flow_exit();
Jiri Pirko5b9e7e12014-06-26 09:58:26 +02002185error_unreg_rtnl_link:
2186 ovs_internal_dev_rtnl_link_unregister();
Andy Zhou971427f32014-09-15 19:37:25 -07002187error_action_fifos_exit:
2188 action_fifos_exit();
Jesse Grossccb13522011-10-25 19:26:31 -07002189error:
2190 return err;
2191}
2192
2193static void dp_cleanup(void)
2194{
Jesse Grossccb13522011-10-25 19:26:31 -07002195 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
Thomas Graf62b9c8d2014-10-22 17:29:06 +02002196 ovs_netdev_exit();
Jesse Grossccb13522011-10-25 19:26:31 -07002197 unregister_netdevice_notifier(&ovs_dp_device_notifier);
Pravin B Shelar46df7b82012-02-22 19:58:59 -08002198 unregister_pernet_device(&ovs_net_ops);
2199 rcu_barrier();
Jesse Grossccb13522011-10-25 19:26:31 -07002200 ovs_vport_exit();
2201 ovs_flow_exit();
Jiri Pirko5b9e7e12014-06-26 09:58:26 +02002202 ovs_internal_dev_rtnl_link_unregister();
Andy Zhou971427f32014-09-15 19:37:25 -07002203 action_fifos_exit();
Jesse Grossccb13522011-10-25 19:26:31 -07002204}
2205
2206module_init(dp_init);
2207module_exit(dp_cleanup);
2208
2209MODULE_DESCRIPTION("Open vSwitch switching datapath");
2210MODULE_LICENSE("GPL");