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Commit | Line | Data |
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064af421 | 1 | /* |
e0edde6f | 2 | * Copyright (c) 2007-2012 Nicira, Inc. |
a14bc59f | 3 | * |
a9a29d22 JG |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
064af421 BP |
17 | */ |
18 | ||
dfffaef1 JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
064af421 BP |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> | |
064af421 | 23 | #include <linux/if_arp.h> |
064af421 BP |
24 | #include <linux/if_vlan.h> |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
982b8810 | 27 | #include <linux/jhash.h> |
064af421 BP |
28 | #include <linux/delay.h> |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
ed099e92 | 31 | #include <linux/genetlink.h> |
064af421 BP |
32 | #include <linux/kernel.h> |
33 | #include <linux/kthread.h> | |
064af421 BP |
34 | #include <linux/mutex.h> |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
39 | #include <linux/version.h> | |
40 | #include <linux/ethtool.h> | |
064af421 | 41 | #include <linux/wait.h> |
064af421 | 42 | #include <asm/div64.h> |
656a0e37 | 43 | #include <linux/highmem.h> |
064af421 BP |
44 | #include <linux/netfilter_bridge.h> |
45 | #include <linux/netfilter_ipv4.h> | |
46 | #include <linux/inetdevice.h> | |
47 | #include <linux/list.h> | |
077257b8 | 48 | #include <linux/openvswitch.h> |
064af421 | 49 | #include <linux/rculist.h> |
064af421 | 50 | #include <linux/dmi.h> |
36956a7d | 51 | #include <net/genetlink.h> |
2a4999f3 PS |
52 | #include <net/net_namespace.h> |
53 | #include <net/netns/generic.h> | |
064af421 | 54 | |
dd8d6b8c | 55 | #include "checksum.h" |
064af421 | 56 | #include "datapath.h" |
064af421 | 57 | #include "flow.h" |
b9c15df9 | 58 | #include "genl_exec.h" |
303708cc | 59 | #include "vlan.h" |
3544358a | 60 | #include "tunnel.h" |
f2459fe7 | 61 | #include "vport-internal_dev.h" |
064af421 | 62 | |
4cf41591 | 63 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) || \ |
70cf679a PS |
64 | LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0) |
65 | #error Kernels before 2.6.18 or after 3.6 are not supported by this version of Open vSwitch. | |
4cf41591 JG |
66 | #endif |
67 | ||
acd051f1 PS |
68 | #define REHASH_FLOW_INTERVAL (10 * 60 * HZ) |
69 | static void rehash_flow_table(struct work_struct *work); | |
70 | static DECLARE_DELAYED_WORK(rehash_flow_wq, rehash_flow_table); | |
71 | ||
2a4999f3 PS |
72 | int ovs_net_id __read_mostly; |
73 | ||
850b6b3b JG |
74 | int (*ovs_dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd); |
75 | EXPORT_SYMBOL(ovs_dp_ioctl_hook); | |
064af421 | 76 | |
ed099e92 BP |
77 | /** |
78 | * DOC: Locking: | |
064af421 | 79 | * |
ed099e92 BP |
80 | * Writes to device state (add/remove datapath, port, set operations on vports, |
81 | * etc.) are protected by RTNL. | |
064af421 | 82 | * |
ed099e92 | 83 | * Writes to other state (flow table modifications, set miscellaneous datapath |
7257b535 BP |
84 | * parameters, etc.) are protected by genl_mutex. The RTNL lock nests inside |
85 | * genl_mutex. | |
ed099e92 BP |
86 | * |
87 | * Reads are protected by RCU. | |
88 | * | |
89 | * There are a few special cases (mostly stats) that have their own | |
90 | * synchronization but they nest under all of above and don't interact with | |
91 | * each other. | |
064af421 | 92 | */ |
ed099e92 | 93 | |
c19e6535 | 94 | static struct vport *new_vport(const struct vport_parms *); |
2a4999f3 | 95 | static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *, |
7257b535 | 96 | const struct dp_upcall_info *); |
2a4999f3 PS |
97 | static int queue_userspace_packet(struct net *, int dp_ifindex, |
98 | struct sk_buff *, | |
7257b535 | 99 | const struct dp_upcall_info *); |
064af421 | 100 | |
ed099e92 | 101 | /* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */ |
2a4999f3 | 102 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
064af421 | 103 | { |
254f2dc8 BP |
104 | struct datapath *dp = NULL; |
105 | struct net_device *dev; | |
ed099e92 | 106 | |
254f2dc8 | 107 | rcu_read_lock(); |
2a4999f3 | 108 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
254f2dc8 | 109 | if (dev) { |
850b6b3b | 110 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 BP |
111 | if (vport) |
112 | dp = vport->dp; | |
113 | } | |
114 | rcu_read_unlock(); | |
115 | ||
116 | return dp; | |
064af421 | 117 | } |
064af421 | 118 | |
f2459fe7 | 119 | /* Must be called with rcu_read_lock or RTNL lock. */ |
850b6b3b | 120 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 121 | { |
95b1d73a | 122 | struct vport *vport = ovs_vport_rtnl_rcu(dp, OVSP_LOCAL); |
16b82e84 | 123 | return vport->ops->get_name(vport); |
f2459fe7 JG |
124 | } |
125 | ||
99769a40 JG |
126 | static int get_dpifindex(struct datapath *dp) |
127 | { | |
128 | struct vport *local; | |
129 | int ifindex; | |
130 | ||
131 | rcu_read_lock(); | |
132 | ||
95b1d73a | 133 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 134 | if (local) |
16b82e84 | 135 | ifindex = local->ops->get_ifindex(local); |
99769a40 JG |
136 | else |
137 | ifindex = 0; | |
138 | ||
139 | rcu_read_unlock(); | |
140 | ||
141 | return ifindex; | |
142 | } | |
143 | ||
6455100f | 144 | static size_t br_nlmsg_size(void) |
064af421 BP |
145 | { |
146 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
147 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
148 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
149 | + nla_total_size(4) /* IFLA_MASTER */ | |
150 | + nla_total_size(4) /* IFLA_MTU */ | |
064af421 BP |
151 | + nla_total_size(1); /* IFLA_OPERSTATE */ |
152 | } | |
153 | ||
ed099e92 | 154 | /* Caller must hold RTNL lock. */ |
064af421 | 155 | static int dp_fill_ifinfo(struct sk_buff *skb, |
e779d8d9 | 156 | const struct vport *port, |
064af421 BP |
157 | int event, unsigned int flags) |
158 | { | |
027f9007 | 159 | struct datapath *dp = port->dp; |
064af421 BP |
160 | struct ifinfomsg *hdr; |
161 | struct nlmsghdr *nlh; | |
162 | ||
16b82e84 JG |
163 | if (!port->ops->get_ifindex) |
164 | return -ENODEV; | |
f2459fe7 | 165 | |
064af421 BP |
166 | nlh = nlmsg_put(skb, 0, 0, event, sizeof(*hdr), flags); |
167 | if (nlh == NULL) | |
168 | return -EMSGSIZE; | |
169 | ||
170 | hdr = nlmsg_data(nlh); | |
171 | hdr->ifi_family = AF_BRIDGE; | |
172 | hdr->__ifi_pad = 0; | |
f2459fe7 | 173 | hdr->ifi_type = ARPHRD_ETHER; |
16b82e84 JG |
174 | hdr->ifi_index = port->ops->get_ifindex(port); |
175 | hdr->ifi_flags = port->ops->get_dev_flags(port); | |
064af421 BP |
176 | hdr->ifi_change = 0; |
177 | ||
c3cc8c03 DM |
178 | if (nla_put_string(skb, IFLA_IFNAME, port->ops->get_name(port)) || |
179 | nla_put_u32(skb, IFLA_MASTER, get_dpifindex(dp)) || | |
180 | nla_put_u32(skb, IFLA_MTU, port->ops->get_mtu(port)) || | |
064af421 | 181 | #ifdef IFLA_OPERSTATE |
c3cc8c03 DM |
182 | nla_put_u8(skb, IFLA_OPERSTATE, |
183 | port->ops->is_running(port) ? | |
184 | port->ops->get_operstate(port) : | |
185 | IF_OPER_DOWN) || | |
064af421 | 186 | #endif |
c3cc8c03 DM |
187 | nla_put(skb, IFLA_ADDRESS, ETH_ALEN, port->ops->get_addr(port))) |
188 | goto nla_put_failure; | |
064af421 | 189 | |
064af421 BP |
190 | return nlmsg_end(skb, nlh); |
191 | ||
192 | nla_put_failure: | |
193 | nlmsg_cancel(skb, nlh); | |
194 | return -EMSGSIZE; | |
195 | } | |
196 | ||
ed099e92 | 197 | /* Caller must hold RTNL lock. */ |
e779d8d9 | 198 | static void dp_ifinfo_notify(int event, struct vport *port) |
064af421 | 199 | { |
064af421 | 200 | struct sk_buff *skb; |
16b82e84 | 201 | int err; |
064af421 BP |
202 | |
203 | skb = nlmsg_new(br_nlmsg_size(), GFP_KERNEL); | |
16b82e84 JG |
204 | if (!skb) { |
205 | err = -ENOBUFS; | |
206 | goto err; | |
207 | } | |
064af421 BP |
208 | |
209 | err = dp_fill_ifinfo(skb, port, event, 0); | |
210 | if (err < 0) { | |
16b82e84 JG |
211 | if (err == -ENODEV) { |
212 | goto out; | |
213 | } else { | |
214 | /* -EMSGSIZE implies BUG in br_nlmsg_size() */ | |
215 | WARN_ON(err == -EMSGSIZE); | |
216 | goto err; | |
217 | } | |
064af421 | 218 | } |
16b82e84 | 219 | |
2a4999f3 | 220 | rtnl_notify(skb, ovs_dp_get_net(port->dp), 0, RTNLGRP_LINK, NULL, GFP_KERNEL); |
16b82e84 | 221 | |
cfe7c1f5 | 222 | return; |
16b82e84 | 223 | err: |
2a4999f3 | 224 | rtnl_set_sk_err(ovs_dp_get_net(port->dp), RTNLGRP_LINK, err); |
16b82e84 JG |
225 | out: |
226 | kfree_skb(skb); | |
064af421 BP |
227 | } |
228 | ||
58c342f6 BP |
229 | static void release_dp(struct kobject *kobj) |
230 | { | |
231 | struct datapath *dp = container_of(kobj, struct datapath, ifobj); | |
232 | kfree(dp); | |
233 | } | |
234 | ||
35f7605b | 235 | static struct kobj_type dp_ktype = { |
58c342f6 BP |
236 | .release = release_dp |
237 | }; | |
238 | ||
46c6a11d JG |
239 | static void destroy_dp_rcu(struct rcu_head *rcu) |
240 | { | |
241 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 242 | |
850b6b3b | 243 | ovs_flow_tbl_destroy((__force struct flow_table *)dp->table); |
46c6a11d | 244 | free_percpu(dp->stats_percpu); |
2a4999f3 | 245 | release_net(ovs_dp_get_net(dp)); |
95b1d73a | 246 | kfree(dp->ports); |
46c6a11d JG |
247 | kobject_put(&dp->ifobj); |
248 | } | |
249 | ||
95b1d73a PS |
250 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
251 | u16 port_no) | |
252 | { | |
253 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
254 | } | |
255 | ||
256 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) | |
257 | { | |
258 | struct vport *vport; | |
259 | struct hlist_node *n; | |
260 | struct hlist_head *head; | |
261 | ||
262 | head = vport_hash_bucket(dp, port_no); | |
263 | hlist_for_each_entry_rcu(vport, n, head, dp_hash_node) { | |
264 | if (vport->port_no == port_no) | |
265 | return vport; | |
266 | } | |
267 | return NULL; | |
268 | } | |
269 | ||
ed099e92 | 270 | /* Called with RTNL lock and genl_lock. */ |
c19e6535 | 271 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 272 | { |
f2459fe7 | 273 | struct vport *vport; |
f2459fe7 | 274 | |
850b6b3b | 275 | vport = ovs_vport_add(parms); |
c19e6535 BP |
276 | if (!IS_ERR(vport)) { |
277 | struct datapath *dp = parms->dp; | |
95b1d73a | 278 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 279 | |
95b1d73a | 280 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 BP |
281 | dp_ifinfo_notify(RTM_NEWLINK, vport); |
282 | } | |
c19e6535 | 283 | return vport; |
064af421 BP |
284 | } |
285 | ||
ed099e92 | 286 | /* Called with RTNL lock. */ |
850b6b3b | 287 | void ovs_dp_detach_port(struct vport *p) |
064af421 BP |
288 | { |
289 | ASSERT_RTNL(); | |
290 | ||
df2c07f4 | 291 | if (p->port_no != OVSP_LOCAL) |
850b6b3b | 292 | ovs_dp_sysfs_del_if(p); |
95b1d73a | 293 | |
064af421 BP |
294 | dp_ifinfo_notify(RTM_DELLINK, p); |
295 | ||
064af421 | 296 | /* First drop references to device. */ |
95b1d73a | 297 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 298 | |
7237e4f4 | 299 | /* Then destroy it. */ |
850b6b3b | 300 | ovs_vport_del(p); |
064af421 BP |
301 | } |
302 | ||
8819fac7 | 303 | /* Must be called with rcu_read_lock. */ |
850b6b3b | 304 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
305 | { |
306 | struct datapath *dp = p->dp; | |
3544358a | 307 | struct sw_flow *flow; |
064af421 | 308 | struct dp_stats_percpu *stats; |
e9141eec | 309 | u64 *stats_counter; |
4c1ad233 | 310 | int error; |
064af421 | 311 | |
e9141eec | 312 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); |
a063b0df | 313 | |
3976f6d5 | 314 | if (!OVS_CB(skb)->flow) { |
36956a7d | 315 | struct sw_flow_key key; |
76abe283 | 316 | int key_len; |
4c1ad233 | 317 | |
3976f6d5 | 318 | /* Extract flow from 'skb' into 'key'. */ |
850b6b3b | 319 | error = ovs_flow_extract(skb, p->port_no, &key, &key_len); |
3976f6d5 JG |
320 | if (unlikely(error)) { |
321 | kfree_skb(skb); | |
322 | return; | |
323 | } | |
064af421 | 324 | |
3976f6d5 | 325 | /* Look up flow. */ |
850b6b3b JG |
326 | flow = ovs_flow_tbl_lookup(rcu_dereference(dp->table), |
327 | &key, key_len); | |
3544358a | 328 | if (unlikely(!flow)) { |
856081f6 BP |
329 | struct dp_upcall_info upcall; |
330 | ||
df2c07f4 | 331 | upcall.cmd = OVS_PACKET_CMD_MISS; |
856081f6 | 332 | upcall.key = &key; |
98403001 BP |
333 | upcall.userdata = NULL; |
334 | upcall.pid = p->upcall_pid; | |
850b6b3b | 335 | ovs_dp_upcall(dp, skb, &upcall); |
d9e214da | 336 | consume_skb(skb); |
e9141eec | 337 | stats_counter = &stats->n_missed; |
3976f6d5 JG |
338 | goto out; |
339 | } | |
340 | ||
3544358a | 341 | OVS_CB(skb)->flow = flow; |
55574bb0 BP |
342 | } |
343 | ||
e9141eec | 344 | stats_counter = &stats->n_hit; |
850b6b3b JG |
345 | ovs_flow_used(OVS_CB(skb)->flow, skb); |
346 | ovs_execute_actions(dp, skb); | |
55574bb0 | 347 | |
8819fac7 | 348 | out: |
55574bb0 | 349 | /* Update datapath statistics. */ |
821cb9fa | 350 | u64_stats_update_begin(&stats->sync); |
e9141eec | 351 | (*stats_counter)++; |
821cb9fa | 352 | u64_stats_update_end(&stats->sync); |
064af421 BP |
353 | } |
354 | ||
aa5a8fdc JG |
355 | static struct genl_family dp_packet_genl_family = { |
356 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
357 | .hdrsize = sizeof(struct ovs_header), |
358 | .name = OVS_PACKET_FAMILY, | |
69685a88 | 359 | .version = OVS_PACKET_VERSION, |
2a4999f3 PS |
360 | .maxattr = OVS_PACKET_ATTR_MAX, |
361 | SET_NETNSOK | |
aa5a8fdc JG |
362 | }; |
363 | ||
850b6b3b JG |
364 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
365 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc JG |
366 | { |
367 | struct dp_stats_percpu *stats; | |
7257b535 | 368 | int dp_ifindex; |
aa5a8fdc JG |
369 | int err; |
370 | ||
98403001 | 371 | if (upcall_info->pid == 0) { |
b063d9f0 | 372 | err = -ENOTCONN; |
b063d9f0 JG |
373 | goto err; |
374 | } | |
375 | ||
7257b535 BP |
376 | dp_ifindex = get_dpifindex(dp); |
377 | if (!dp_ifindex) { | |
378 | err = -ENODEV; | |
379 | goto err; | |
aa5a8fdc JG |
380 | } |
381 | ||
7257b535 | 382 | forward_ip_summed(skb, true); |
36ce148c | 383 | |
7257b535 | 384 | if (!skb_is_gso(skb)) |
2a4999f3 | 385 | err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
7257b535 | 386 | else |
2a4999f3 | 387 | err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
d76195db JG |
388 | if (err) |
389 | goto err; | |
390 | ||
391 | return 0; | |
aa5a8fdc | 392 | |
aa5a8fdc | 393 | err: |
aa5a8fdc JG |
394 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); |
395 | ||
821cb9fa | 396 | u64_stats_update_begin(&stats->sync); |
aa5a8fdc | 397 | stats->n_lost++; |
821cb9fa | 398 | u64_stats_update_end(&stats->sync); |
aa5a8fdc | 399 | |
aa5a8fdc | 400 | return err; |
982b8810 BP |
401 | } |
402 | ||
2a4999f3 PS |
403 | static int queue_gso_packets(struct net *net, int dp_ifindex, |
404 | struct sk_buff *skb, | |
7257b535 | 405 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 406 | { |
d4cba1f8 | 407 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
408 | struct dp_upcall_info later_info; |
409 | struct sw_flow_key later_key; | |
410 | struct sk_buff *segs, *nskb; | |
411 | int err; | |
cb5087ca | 412 | |
7257b535 | 413 | segs = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM); |
79089764 PS |
414 | if (IS_ERR(segs)) |
415 | return PTR_ERR(segs); | |
99769a40 | 416 | |
7257b535 BP |
417 | /* Queue all of the segments. */ |
418 | skb = segs; | |
cb5087ca | 419 | do { |
2a4999f3 | 420 | err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info); |
982b8810 | 421 | if (err) |
7257b535 | 422 | break; |
856081f6 | 423 | |
d4cba1f8 | 424 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
e1cf87ff JG |
425 | /* The initial flow key extracted by ovs_flow_extract() |
426 | * in this case is for a first fragment, so we need to | |
7257b535 BP |
427 | * properly mark later fragments. |
428 | */ | |
429 | later_key = *upcall_info->key; | |
9e44d715 | 430 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
7257b535 BP |
431 | |
432 | later_info = *upcall_info; | |
433 | later_info.key = &later_key; | |
434 | upcall_info = &later_info; | |
435 | } | |
36ce148c | 436 | } while ((skb = skb->next)); |
cb5087ca | 437 | |
7257b535 BP |
438 | /* Free all of the segments. */ |
439 | skb = segs; | |
440 | do { | |
441 | nskb = skb->next; | |
442 | if (err) | |
443 | kfree_skb(skb); | |
444 | else | |
445 | consume_skb(skb); | |
446 | } while ((skb = nskb)); | |
447 | return err; | |
448 | } | |
449 | ||
2a4999f3 PS |
450 | static int queue_userspace_packet(struct net *net, int dp_ifindex, |
451 | struct sk_buff *skb, | |
7257b535 BP |
452 | const struct dp_upcall_info *upcall_info) |
453 | { | |
454 | struct ovs_header *upcall; | |
6161d3fd | 455 | struct sk_buff *nskb = NULL; |
7257b535 BP |
456 | struct sk_buff *user_skb; /* to be queued to userspace */ |
457 | struct nlattr *nla; | |
458 | unsigned int len; | |
459 | int err; | |
460 | ||
6161d3fd JG |
461 | if (vlan_tx_tag_present(skb)) { |
462 | nskb = skb_clone(skb, GFP_ATOMIC); | |
463 | if (!nskb) | |
464 | return -ENOMEM; | |
465 | ||
466 | err = vlan_deaccel_tag(nskb); | |
467 | if (err) | |
468 | return err; | |
7257b535 | 469 | |
6161d3fd JG |
470 | skb = nskb; |
471 | } | |
472 | ||
473 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
474 | err = -EFBIG; | |
475 | goto out; | |
476 | } | |
7257b535 BP |
477 | |
478 | len = sizeof(struct ovs_header); | |
479 | len += nla_total_size(skb->len); | |
480 | len += nla_total_size(FLOW_BUFSIZE); | |
481 | if (upcall_info->cmd == OVS_PACKET_CMD_ACTION) | |
482 | len += nla_total_size(8); | |
483 | ||
484 | user_skb = genlmsg_new(len, GFP_ATOMIC); | |
6161d3fd JG |
485 | if (!user_skb) { |
486 | err = -ENOMEM; | |
487 | goto out; | |
488 | } | |
7257b535 BP |
489 | |
490 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
491 | 0, upcall_info->cmd); | |
492 | upcall->dp_ifindex = dp_ifindex; | |
493 | ||
494 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
850b6b3b | 495 | ovs_flow_to_nlattrs(upcall_info->key, user_skb); |
7257b535 BP |
496 | nla_nest_end(user_skb, nla); |
497 | ||
498 | if (upcall_info->userdata) | |
499 | nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA, | |
500 | nla_get_u64(upcall_info->userdata)); | |
501 | ||
502 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); | |
bed53bd1 PS |
503 | |
504 | skb_copy_and_csum_dev(skb, nla_data(nla)); | |
7257b535 | 505 | |
2a4999f3 | 506 | err = genlmsg_unicast(net, user_skb, upcall_info->pid); |
6161d3fd JG |
507 | |
508 | out: | |
509 | kfree_skb(nskb); | |
510 | return err; | |
cb5087ca BP |
511 | } |
512 | ||
ed099e92 | 513 | /* Called with genl_mutex. */ |
2a4999f3 | 514 | static int flush_flows(struct datapath *dp) |
064af421 | 515 | { |
3544358a PS |
516 | struct flow_table *old_table; |
517 | struct flow_table *new_table; | |
8d5ebd83 | 518 | |
20d035b2 | 519 | old_table = genl_dereference(dp->table); |
850b6b3b | 520 | new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS); |
8d5ebd83 | 521 | if (!new_table) |
ed099e92 | 522 | return -ENOMEM; |
8d5ebd83 JG |
523 | |
524 | rcu_assign_pointer(dp->table, new_table); | |
525 | ||
850b6b3b | 526 | ovs_flow_tbl_deferred_destroy(old_table); |
ed099e92 | 527 | return 0; |
064af421 BP |
528 | } |
529 | ||
4edb9ae9 PS |
530 | static int validate_actions(const struct nlattr *attr, |
531 | const struct sw_flow_key *key, int depth); | |
6ff686f2 | 532 | |
4edb9ae9 PS |
533 | static int validate_sample(const struct nlattr *attr, |
534 | const struct sw_flow_key *key, int depth) | |
6ff686f2 | 535 | { |
4be00e48 BP |
536 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; |
537 | const struct nlattr *probability, *actions; | |
538 | const struct nlattr *a; | |
539 | int rem; | |
540 | ||
541 | memset(attrs, 0, sizeof(attrs)); | |
6455100f | 542 | nla_for_each_nested(a, attr, rem) { |
4be00e48 BP |
543 | int type = nla_type(a); |
544 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
545 | return -EINVAL; | |
546 | attrs[type] = a; | |
547 | } | |
548 | if (rem) | |
6ff686f2 | 549 | return -EINVAL; |
4be00e48 BP |
550 | |
551 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
552 | if (!probability || nla_len(probability) != sizeof(u32)) | |
6ff686f2 PS |
553 | return -EINVAL; |
554 | ||
4be00e48 BP |
555 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; |
556 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
557 | return -EINVAL; | |
558 | return validate_actions(actions, key, depth + 1); | |
4edb9ae9 PS |
559 | } |
560 | ||
b1323f59 PS |
561 | static int validate_tp_port(const struct sw_flow_key *flow_key) |
562 | { | |
563 | if (flow_key->eth.type == htons(ETH_P_IP)) { | |
6e9bea4d | 564 | if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst) |
b1323f59 PS |
565 | return 0; |
566 | } else if (flow_key->eth.type == htons(ETH_P_IPV6)) { | |
6e9bea4d | 567 | if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst) |
b1323f59 PS |
568 | return 0; |
569 | } | |
570 | ||
571 | return -EINVAL; | |
572 | } | |
573 | ||
fea393b1 BP |
574 | static int validate_set(const struct nlattr *a, |
575 | const struct sw_flow_key *flow_key) | |
4edb9ae9 | 576 | { |
4edb9ae9 PS |
577 | const struct nlattr *ovs_key = nla_data(a); |
578 | int key_type = nla_type(ovs_key); | |
579 | ||
580 | /* There can be only one key in a action */ | |
581 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
582 | return -EINVAL; | |
583 | ||
584 | if (key_type > OVS_KEY_ATTR_MAX || | |
585 | nla_len(ovs_key) != ovs_key_lens[key_type]) | |
586 | return -EINVAL; | |
587 | ||
fea393b1 | 588 | switch (key_type) { |
4edb9ae9 | 589 | const struct ovs_key_ipv4 *ipv4_key; |
356af50b | 590 | const struct ovs_key_ipv4_tunnel *tun_key; |
4edb9ae9 | 591 | |
fea393b1 BP |
592 | case OVS_KEY_ATTR_PRIORITY: |
593 | case OVS_KEY_ATTR_TUN_ID: | |
594 | case OVS_KEY_ATTR_ETHERNET: | |
4edb9ae9 PS |
595 | break; |
596 | ||
356af50b KM |
597 | case OVS_KEY_ATTR_IPV4_TUNNEL: |
598 | tun_key = nla_data(ovs_key); | |
599 | if (!tun_key->ipv4_dst) | |
600 | return -EINVAL; | |
601 | break; | |
602 | ||
fea393b1 | 603 | case OVS_KEY_ATTR_IPV4: |
4edb9ae9 PS |
604 | if (flow_key->eth.type != htons(ETH_P_IP)) |
605 | return -EINVAL; | |
606 | ||
6e9bea4d | 607 | if (!flow_key->ip.proto) |
4edb9ae9 PS |
608 | return -EINVAL; |
609 | ||
610 | ipv4_key = nla_data(ovs_key); | |
611 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
612 | return -EINVAL; | |
613 | ||
9e44d715 | 614 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) |
7257b535 BP |
615 | return -EINVAL; |
616 | ||
4edb9ae9 PS |
617 | break; |
618 | ||
fea393b1 | 619 | case OVS_KEY_ATTR_TCP: |
4edb9ae9 PS |
620 | if (flow_key->ip.proto != IPPROTO_TCP) |
621 | return -EINVAL; | |
622 | ||
b1323f59 | 623 | return validate_tp_port(flow_key); |
4edb9ae9 | 624 | |
fea393b1 | 625 | case OVS_KEY_ATTR_UDP: |
4edb9ae9 PS |
626 | if (flow_key->ip.proto != IPPROTO_UDP) |
627 | return -EINVAL; | |
628 | ||
b1323f59 | 629 | return validate_tp_port(flow_key); |
4edb9ae9 PS |
630 | |
631 | default: | |
632 | return -EINVAL; | |
633 | } | |
fea393b1 | 634 | |
4edb9ae9 | 635 | return 0; |
6ff686f2 PS |
636 | } |
637 | ||
98403001 BP |
638 | static int validate_userspace(const struct nlattr *attr) |
639 | { | |
6455100f | 640 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { |
98403001 BP |
641 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, |
642 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_U64 }, | |
643 | }; | |
644 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
645 | int error; | |
646 | ||
6455100f PS |
647 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, |
648 | attr, userspace_policy); | |
98403001 BP |
649 | if (error) |
650 | return error; | |
651 | ||
6455100f PS |
652 | if (!a[OVS_USERSPACE_ATTR_PID] || |
653 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
98403001 BP |
654 | return -EINVAL; |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
4edb9ae9 PS |
659 | static int validate_actions(const struct nlattr *attr, |
660 | const struct sw_flow_key *key, int depth) | |
064af421 | 661 | { |
23cad98c | 662 | const struct nlattr *a; |
6ff686f2 PS |
663 | int rem, err; |
664 | ||
665 | if (depth >= SAMPLE_ACTION_DEPTH) | |
666 | return -EOVERFLOW; | |
23cad98c | 667 | |
37a1300c | 668 | nla_for_each_nested(a, attr, rem) { |
98403001 | 669 | /* Expected argument lengths, (u32)-1 for variable length. */ |
df2c07f4 | 670 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
fea393b1 | 671 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), |
98403001 | 672 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
fea393b1 BP |
673 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
674 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
4edb9ae9 | 675 | [OVS_ACTION_ATTR_SET] = (u32)-1, |
98403001 | 676 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1 |
23cad98c | 677 | }; |
fea393b1 | 678 | const struct ovs_action_push_vlan *vlan; |
23cad98c BP |
679 | int type = nla_type(a); |
680 | ||
6ff686f2 | 681 | if (type > OVS_ACTION_ATTR_MAX || |
98403001 BP |
682 | (action_lens[type] != nla_len(a) && |
683 | action_lens[type] != (u32)-1)) | |
23cad98c BP |
684 | return -EINVAL; |
685 | ||
686 | switch (type) { | |
df2c07f4 | 687 | case OVS_ACTION_ATTR_UNSPEC: |
cdee00fd | 688 | return -EINVAL; |
064af421 | 689 | |
98403001 BP |
690 | case OVS_ACTION_ATTR_USERSPACE: |
691 | err = validate_userspace(a); | |
692 | if (err) | |
693 | return err; | |
694 | break; | |
695 | ||
df2c07f4 | 696 | case OVS_ACTION_ATTR_OUTPUT: |
23cad98c BP |
697 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
698 | return -EINVAL; | |
3b1fc5f3 | 699 | break; |
cdee00fd | 700 | |
4edb9ae9 | 701 | |
fea393b1 BP |
702 | case OVS_ACTION_ATTR_POP_VLAN: |
703 | break; | |
704 | ||
705 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
706 | vlan = nla_data(a); | |
707 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
708 | return -EINVAL; | |
8ddc056d | 709 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) |
064af421 | 710 | return -EINVAL; |
23cad98c | 711 | break; |
064af421 | 712 | |
4edb9ae9 | 713 | case OVS_ACTION_ATTR_SET: |
fea393b1 | 714 | err = validate_set(a, key); |
4edb9ae9 PS |
715 | if (err) |
716 | return err; | |
23cad98c | 717 | break; |
064af421 | 718 | |
6ff686f2 | 719 | case OVS_ACTION_ATTR_SAMPLE: |
4edb9ae9 | 720 | err = validate_sample(a, key, depth); |
6ff686f2 PS |
721 | if (err) |
722 | return err; | |
723 | break; | |
724 | ||
23cad98c | 725 | default: |
4edb9ae9 | 726 | return -EINVAL; |
23cad98c BP |
727 | } |
728 | } | |
3c5f6de3 | 729 | |
23cad98c BP |
730 | if (rem > 0) |
731 | return -EINVAL; | |
064af421 | 732 | |
23cad98c | 733 | return 0; |
064af421 | 734 | } |
4edb9ae9 | 735 | |
064af421 BP |
736 | static void clear_stats(struct sw_flow *flow) |
737 | { | |
6bfafa55 | 738 | flow->used = 0; |
064af421 | 739 | flow->tcp_flags = 0; |
064af421 BP |
740 | flow->packet_count = 0; |
741 | flow->byte_count = 0; | |
742 | } | |
743 | ||
df2c07f4 | 744 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 745 | { |
df2c07f4 | 746 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 747 | struct nlattr **a = info->attrs; |
e0e57990 | 748 | struct sw_flow_actions *acts; |
982b8810 | 749 | struct sk_buff *packet; |
e0e57990 | 750 | struct sw_flow *flow; |
f7cd0081 | 751 | struct datapath *dp; |
d6569377 | 752 | struct ethhdr *eth; |
3f19d399 | 753 | int len; |
d6569377 | 754 | int err; |
76abe283 | 755 | int key_len; |
064af421 | 756 | |
f7cd0081 | 757 | err = -EINVAL; |
df2c07f4 JP |
758 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
759 | !a[OVS_PACKET_ATTR_ACTIONS] || | |
760 | nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN) | |
e5cad958 | 761 | goto err; |
064af421 | 762 | |
df2c07f4 | 763 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 764 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
765 | err = -ENOMEM; |
766 | if (!packet) | |
e5cad958 | 767 | goto err; |
3f19d399 BP |
768 | skb_reserve(packet, NET_IP_ALIGN); |
769 | ||
df2c07f4 | 770 | memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len); |
8d5ebd83 | 771 | |
f7cd0081 BP |
772 | skb_reset_mac_header(packet); |
773 | eth = eth_hdr(packet); | |
064af421 | 774 | |
d6569377 BP |
775 | /* Normally, setting the skb 'protocol' field would be handled by a |
776 | * call to eth_type_trans(), but it assumes there's a sending | |
777 | * device, which we may not have. */ | |
778 | if (ntohs(eth->h_proto) >= 1536) | |
f7cd0081 | 779 | packet->protocol = eth->h_proto; |
d6569377 | 780 | else |
f7cd0081 | 781 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 782 | |
e0e57990 | 783 | /* Build an sw_flow for sending this packet. */ |
850b6b3b | 784 | flow = ovs_flow_alloc(); |
e0e57990 BP |
785 | err = PTR_ERR(flow); |
786 | if (IS_ERR(flow)) | |
e5cad958 | 787 | goto err_kfree_skb; |
064af421 | 788 | |
850b6b3b | 789 | err = ovs_flow_extract(packet, -1, &flow->key, &key_len); |
e0e57990 BP |
790 | if (err) |
791 | goto err_flow_put; | |
e0e57990 | 792 | |
13e24889 | 793 | err = ovs_flow_metadata_from_nlattrs(flow, key_len, a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 BP |
794 | if (err) |
795 | goto err_flow_put; | |
796 | ||
4edb9ae9 PS |
797 | err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0); |
798 | if (err) | |
799 | goto err_flow_put; | |
800 | ||
850b6b3b | 801 | acts = ovs_flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]); |
e0e57990 BP |
802 | err = PTR_ERR(acts); |
803 | if (IS_ERR(acts)) | |
804 | goto err_flow_put; | |
805 | rcu_assign_pointer(flow->sf_acts, acts); | |
806 | ||
807 | OVS_CB(packet)->flow = flow; | |
abff858b | 808 | packet->priority = flow->key.phy.priority; |
e0e57990 | 809 | |
d6569377 | 810 | rcu_read_lock(); |
2a4999f3 | 811 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 812 | err = -ENODEV; |
e5cad958 BP |
813 | if (!dp) |
814 | goto err_unlock; | |
cc4015df | 815 | |
e9141eec | 816 | local_bh_disable(); |
850b6b3b | 817 | err = ovs_execute_actions(dp, packet); |
e9141eec | 818 | local_bh_enable(); |
d6569377 | 819 | rcu_read_unlock(); |
e0e57990 | 820 | |
850b6b3b | 821 | ovs_flow_put(flow); |
e5cad958 | 822 | return err; |
064af421 | 823 | |
e5cad958 BP |
824 | err_unlock: |
825 | rcu_read_unlock(); | |
e0e57990 | 826 | err_flow_put: |
850b6b3b | 827 | ovs_flow_put(flow); |
e5cad958 BP |
828 | err_kfree_skb: |
829 | kfree_skb(packet); | |
830 | err: | |
d6569377 | 831 | return err; |
064af421 BP |
832 | } |
833 | ||
df2c07f4 JP |
834 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
835 | [OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC }, | |
836 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, | |
837 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
838 | }; |
839 | ||
840 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 841 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
842 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
843 | .policy = packet_policy, | |
df2c07f4 | 844 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
845 | } |
846 | }; | |
847 | ||
df2c07f4 | 848 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) |
064af421 | 849 | { |
d6569377 | 850 | int i; |
20d035b2 | 851 | struct flow_table *table = genl_dereference(dp->table); |
f180c2e2 | 852 | |
850b6b3b | 853 | stats->n_flows = ovs_flow_tbl_count(table); |
064af421 | 854 | |
7257b535 | 855 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
d6569377 BP |
856 | for_each_possible_cpu(i) { |
857 | const struct dp_stats_percpu *percpu_stats; | |
858 | struct dp_stats_percpu local_stats; | |
821cb9fa | 859 | unsigned int start; |
44e05eca | 860 | |
d6569377 | 861 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 862 | |
d6569377 | 863 | do { |
821cb9fa | 864 | start = u64_stats_fetch_begin_bh(&percpu_stats->sync); |
d6569377 | 865 | local_stats = *percpu_stats; |
821cb9fa | 866 | } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); |
064af421 | 867 | |
d6569377 BP |
868 | stats->n_hit += local_stats.n_hit; |
869 | stats->n_missed += local_stats.n_missed; | |
870 | stats->n_lost += local_stats.n_lost; | |
871 | } | |
872 | } | |
064af421 | 873 | |
df2c07f4 JP |
874 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
875 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
876 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
877 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 878 | }; |
36956a7d | 879 | |
37a1300c BP |
880 | static struct genl_family dp_flow_genl_family = { |
881 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
882 | .hdrsize = sizeof(struct ovs_header), |
883 | .name = OVS_FLOW_FAMILY, | |
69685a88 | 884 | .version = OVS_FLOW_VERSION, |
2a4999f3 PS |
885 | .maxattr = OVS_FLOW_ATTR_MAX, |
886 | SET_NETNSOK | |
37a1300c | 887 | }; |
ed099e92 | 888 | |
850b6b3b | 889 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { |
df2c07f4 | 890 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
891 | }; |
892 | ||
893 | /* Called with genl_lock. */ | |
df2c07f4 | 894 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
6455100f PS |
895 | struct sk_buff *skb, u32 pid, |
896 | u32 seq, u32 flags, u8 cmd) | |
d6569377 | 897 | { |
37a1300c | 898 | const int skb_orig_len = skb->len; |
d6569377 | 899 | const struct sw_flow_actions *sf_acts; |
df2c07f4 JP |
900 | struct ovs_flow_stats stats; |
901 | struct ovs_header *ovs_header; | |
d6569377 BP |
902 | struct nlattr *nla; |
903 | unsigned long used; | |
904 | u8 tcp_flags; | |
905 | int err; | |
064af421 | 906 | |
d6569377 | 907 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 908 | lockdep_genl_is_held()); |
064af421 | 909 | |
df2c07f4 JP |
910 | ovs_header = genlmsg_put(skb, pid, seq, &dp_flow_genl_family, flags, cmd); |
911 | if (!ovs_header) | |
37a1300c | 912 | return -EMSGSIZE; |
d6569377 | 913 | |
99769a40 | 914 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 915 | |
df2c07f4 | 916 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
917 | if (!nla) |
918 | goto nla_put_failure; | |
850b6b3b | 919 | err = ovs_flow_to_nlattrs(&flow->key, skb); |
d6569377 | 920 | if (err) |
37a1300c | 921 | goto error; |
d6569377 BP |
922 | nla_nest_end(skb, nla); |
923 | ||
924 | spin_lock_bh(&flow->lock); | |
925 | used = flow->used; | |
926 | stats.n_packets = flow->packet_count; | |
927 | stats.n_bytes = flow->byte_count; | |
928 | tcp_flags = flow->tcp_flags; | |
929 | spin_unlock_bh(&flow->lock); | |
930 | ||
c3cc8c03 DM |
931 | if (used && |
932 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
933 | goto nla_put_failure; | |
d6569377 | 934 | |
c3cc8c03 DM |
935 | if (stats.n_packets && |
936 | nla_put(skb, OVS_FLOW_ATTR_STATS, | |
937 | sizeof(struct ovs_flow_stats), &stats)) | |
938 | goto nla_put_failure; | |
d6569377 | 939 | |
c3cc8c03 DM |
940 | if (tcp_flags && |
941 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags)) | |
942 | goto nla_put_failure; | |
d6569377 | 943 | |
df2c07f4 | 944 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
945 | * this is the first flow to be dumped into 'skb'. This is unusual for |
946 | * Netlink but individual action lists can be longer than | |
947 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
948 | * The userspace caller can always fetch the actions separately if it | |
949 | * really wants them. (Most userspace callers in fact don't care.) | |
950 | * | |
951 | * This can only fail for dump operations because the skb is always | |
952 | * properly sized for single flows. | |
953 | */ | |
df2c07f4 | 954 | err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len, |
30053024 BP |
955 | sf_acts->actions); |
956 | if (err < 0 && skb_orig_len) | |
957 | goto error; | |
37a1300c | 958 | |
df2c07f4 | 959 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
960 | |
961 | nla_put_failure: | |
962 | err = -EMSGSIZE; | |
37a1300c | 963 | error: |
df2c07f4 | 964 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 965 | return err; |
44e05eca BP |
966 | } |
967 | ||
df2c07f4 | 968 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) |
44e05eca | 969 | { |
37a1300c BP |
970 | const struct sw_flow_actions *sf_acts; |
971 | int len; | |
d6569377 | 972 | |
37a1300c BP |
973 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
974 | lockdep_genl_is_held()); | |
d6569377 | 975 | |
6455100f PS |
976 | /* OVS_FLOW_ATTR_KEY */ |
977 | len = nla_total_size(FLOW_BUFSIZE); | |
978 | /* OVS_FLOW_ATTR_ACTIONS */ | |
979 | len += nla_total_size(sf_acts->actions_len); | |
980 | /* OVS_FLOW_ATTR_STATS */ | |
981 | len += nla_total_size(sizeof(struct ovs_flow_stats)); | |
982 | /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
983 | len += nla_total_size(1); | |
984 | /* OVS_FLOW_ATTR_USED */ | |
985 | len += nla_total_size(8); | |
986 | ||
987 | len += NLMSG_ALIGN(sizeof(struct ovs_header)); | |
988 | ||
989 | return genlmsg_new(len, GFP_KERNEL); | |
37a1300c | 990 | } |
8d5ebd83 | 991 | |
6455100f PS |
992 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, |
993 | struct datapath *dp, | |
37a1300c BP |
994 | u32 pid, u32 seq, u8 cmd) |
995 | { | |
996 | struct sk_buff *skb; | |
997 | int retval; | |
d6569377 | 998 | |
df2c07f4 | 999 | skb = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1000 | if (!skb) |
1001 | return ERR_PTR(-ENOMEM); | |
d6569377 | 1002 | |
df2c07f4 | 1003 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, pid, seq, 0, cmd); |
37a1300c | 1004 | BUG_ON(retval < 0); |
d6569377 | 1005 | return skb; |
064af421 BP |
1006 | } |
1007 | ||
df2c07f4 | 1008 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1009 | { |
37a1300c | 1010 | struct nlattr **a = info->attrs; |
df2c07f4 | 1011 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1012 | struct sw_flow_key key; |
d6569377 | 1013 | struct sw_flow *flow; |
37a1300c | 1014 | struct sk_buff *reply; |
9c52546b | 1015 | struct datapath *dp; |
3544358a | 1016 | struct flow_table *table; |
bc4a05c6 | 1017 | int error; |
76abe283 | 1018 | int key_len; |
064af421 | 1019 | |
37a1300c BP |
1020 | /* Extract key. */ |
1021 | error = -EINVAL; | |
df2c07f4 | 1022 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1023 | goto error; |
850b6b3b | 1024 | error = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1025 | if (error) |
1026 | goto error; | |
064af421 | 1027 | |
37a1300c | 1028 | /* Validate actions. */ |
df2c07f4 | 1029 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
4edb9ae9 | 1030 | error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0); |
37a1300c BP |
1031 | if (error) |
1032 | goto error; | |
df2c07f4 | 1033 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
1034 | error = -EINVAL; |
1035 | goto error; | |
1036 | } | |
1037 | ||
2a4999f3 | 1038 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
d6569377 | 1039 | error = -ENODEV; |
9c52546b | 1040 | if (!dp) |
37a1300c | 1041 | goto error; |
704a1e09 | 1042 | |
20d035b2 | 1043 | table = genl_dereference(dp->table); |
850b6b3b | 1044 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1045 | if (!flow) { |
d6569377 BP |
1046 | struct sw_flow_actions *acts; |
1047 | ||
1048 | /* Bail out if we're not allowed to create a new flow. */ | |
1049 | error = -ENOENT; | |
df2c07f4 | 1050 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
37a1300c | 1051 | goto error; |
d6569377 BP |
1052 | |
1053 | /* Expand table, if necessary, to make room. */ | |
850b6b3b | 1054 | if (ovs_flow_tbl_need_to_expand(table)) { |
3544358a PS |
1055 | struct flow_table *new_table; |
1056 | ||
850b6b3b | 1057 | new_table = ovs_flow_tbl_expand(table); |
3544358a PS |
1058 | if (!IS_ERR(new_table)) { |
1059 | rcu_assign_pointer(dp->table, new_table); | |
850b6b3b | 1060 | ovs_flow_tbl_deferred_destroy(table); |
20d035b2 | 1061 | table = genl_dereference(dp->table); |
3544358a | 1062 | } |
d6569377 BP |
1063 | } |
1064 | ||
1065 | /* Allocate flow. */ | |
850b6b3b | 1066 | flow = ovs_flow_alloc(); |
d6569377 BP |
1067 | if (IS_ERR(flow)) { |
1068 | error = PTR_ERR(flow); | |
37a1300c | 1069 | goto error; |
d6569377 | 1070 | } |
d6569377 BP |
1071 | clear_stats(flow); |
1072 | ||
1073 | /* Obtain actions. */ | |
850b6b3b | 1074 | acts = ovs_flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]); |
d6569377 BP |
1075 | error = PTR_ERR(acts); |
1076 | if (IS_ERR(acts)) | |
1077 | goto error_free_flow; | |
1078 | rcu_assign_pointer(flow->sf_acts, acts); | |
1079 | ||
d6569377 | 1080 | /* Put flow in bucket. */ |
13e24889 | 1081 | ovs_flow_tbl_insert(table, flow, &key, key_len); |
37a1300c | 1082 | |
df2c07f4 | 1083 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
6455100f PS |
1084 | info->snd_seq, |
1085 | OVS_FLOW_CMD_NEW); | |
d6569377 BP |
1086 | } else { |
1087 | /* We found a matching flow. */ | |
1088 | struct sw_flow_actions *old_acts; | |
6455100f | 1089 | struct nlattr *acts_attrs; |
d6569377 BP |
1090 | |
1091 | /* Bail out if we're not allowed to modify an existing flow. | |
1092 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1093 | * because Generic Netlink treats the latter as a dump | |
1094 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1095 | * gets fixed. | |
1096 | */ | |
1097 | error = -EEXIST; | |
df2c07f4 | 1098 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c BP |
1099 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
1100 | goto error; | |
d6569377 BP |
1101 | |
1102 | /* Update actions. */ | |
d6569377 | 1103 | old_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 1104 | lockdep_genl_is_held()); |
6455100f PS |
1105 | acts_attrs = a[OVS_FLOW_ATTR_ACTIONS]; |
1106 | if (acts_attrs && | |
1107 | (old_acts->actions_len != nla_len(acts_attrs) || | |
1108 | memcmp(old_acts->actions, nla_data(acts_attrs), | |
1109 | old_acts->actions_len))) { | |
d6569377 BP |
1110 | struct sw_flow_actions *new_acts; |
1111 | ||
850b6b3b | 1112 | new_acts = ovs_flow_actions_alloc(acts_attrs); |
d6569377 BP |
1113 | error = PTR_ERR(new_acts); |
1114 | if (IS_ERR(new_acts)) | |
37a1300c | 1115 | goto error; |
d6569377 BP |
1116 | |
1117 | rcu_assign_pointer(flow->sf_acts, new_acts); | |
850b6b3b | 1118 | ovs_flow_deferred_free_acts(old_acts); |
d6569377 BP |
1119 | } |
1120 | ||
df2c07f4 | 1121 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
6455100f | 1122 | info->snd_seq, OVS_FLOW_CMD_NEW); |
d6569377 BP |
1123 | |
1124 | /* Clear stats. */ | |
df2c07f4 | 1125 | if (a[OVS_FLOW_ATTR_CLEAR]) { |
d6569377 BP |
1126 | spin_lock_bh(&flow->lock); |
1127 | clear_stats(flow); | |
1128 | spin_unlock_bh(&flow->lock); | |
1129 | } | |
9c52546b | 1130 | } |
37a1300c BP |
1131 | |
1132 | if (!IS_ERR(reply)) | |
1133 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
850b6b3b JG |
1134 | ovs_dp_flow_multicast_group.id, info->nlhdr, |
1135 | GFP_KERNEL); | |
37a1300c | 1136 | else |
2a4999f3 PS |
1137 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
1138 | ovs_dp_flow_multicast_group.id, PTR_ERR(reply)); | |
d6569377 | 1139 | return 0; |
704a1e09 | 1140 | |
d6569377 | 1141 | error_free_flow: |
850b6b3b | 1142 | ovs_flow_put(flow); |
37a1300c | 1143 | error: |
9c52546b | 1144 | return error; |
704a1e09 BP |
1145 | } |
1146 | ||
df2c07f4 | 1147 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1148 | { |
37a1300c | 1149 | struct nlattr **a = info->attrs; |
df2c07f4 | 1150 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1151 | struct sw_flow_key key; |
37a1300c | 1152 | struct sk_buff *reply; |
704a1e09 | 1153 | struct sw_flow *flow; |
9c52546b | 1154 | struct datapath *dp; |
3544358a | 1155 | struct flow_table *table; |
9c52546b | 1156 | int err; |
76abe283 | 1157 | int key_len; |
704a1e09 | 1158 | |
df2c07f4 | 1159 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1160 | return -EINVAL; |
850b6b3b | 1161 | err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1162 | if (err) |
1163 | return err; | |
704a1e09 | 1164 | |
2a4999f3 | 1165 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
9c52546b | 1166 | if (!dp) |
ed099e92 | 1167 | return -ENODEV; |
704a1e09 | 1168 | |
20d035b2 | 1169 | table = genl_dereference(dp->table); |
850b6b3b | 1170 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1171 | if (!flow) |
ed099e92 | 1172 | return -ENOENT; |
d6569377 | 1173 | |
6455100f PS |
1174 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
1175 | info->snd_seq, OVS_FLOW_CMD_NEW); | |
37a1300c BP |
1176 | if (IS_ERR(reply)) |
1177 | return PTR_ERR(reply); | |
36956a7d | 1178 | |
37a1300c | 1179 | return genlmsg_reply(reply, info); |
d6569377 | 1180 | } |
9c52546b | 1181 | |
df2c07f4 | 1182 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1183 | { |
37a1300c | 1184 | struct nlattr **a = info->attrs; |
df2c07f4 | 1185 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1186 | struct sw_flow_key key; |
37a1300c | 1187 | struct sk_buff *reply; |
d6569377 | 1188 | struct sw_flow *flow; |
d6569377 | 1189 | struct datapath *dp; |
3544358a | 1190 | struct flow_table *table; |
d6569377 | 1191 | int err; |
76abe283 | 1192 | int key_len; |
36956a7d | 1193 | |
2a4999f3 PS |
1194 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
1195 | if (!dp) | |
1196 | return -ENODEV; | |
1197 | ||
df2c07f4 | 1198 | if (!a[OVS_FLOW_ATTR_KEY]) |
2a4999f3 PS |
1199 | return flush_flows(dp); |
1200 | ||
850b6b3b | 1201 | err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1202 | if (err) |
1203 | return err; | |
d6569377 | 1204 | |
20d035b2 | 1205 | table = genl_dereference(dp->table); |
850b6b3b | 1206 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1207 | if (!flow) |
37a1300c | 1208 | return -ENOENT; |
d6569377 | 1209 | |
df2c07f4 | 1210 | reply = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1211 | if (!reply) |
1212 | return -ENOMEM; | |
1213 | ||
850b6b3b | 1214 | ovs_flow_tbl_remove(table, flow); |
37a1300c | 1215 | |
df2c07f4 JP |
1216 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_pid, |
1217 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); | |
37a1300c BP |
1218 | BUG_ON(err < 0); |
1219 | ||
850b6b3b | 1220 | ovs_flow_deferred_free(flow); |
37a1300c BP |
1221 | |
1222 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
850b6b3b | 1223 | ovs_dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); |
37a1300c BP |
1224 | return 0; |
1225 | } | |
1226 | ||
df2c07f4 | 1227 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1228 | { |
df2c07f4 | 1229 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
37a1300c | 1230 | struct datapath *dp; |
20d035b2 | 1231 | struct flow_table *table; |
37a1300c | 1232 | |
2a4999f3 | 1233 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
37a1300c BP |
1234 | if (!dp) |
1235 | return -ENODEV; | |
1236 | ||
20d035b2 JG |
1237 | table = genl_dereference(dp->table); |
1238 | ||
37a1300c | 1239 | for (;;) { |
37a1300c BP |
1240 | struct sw_flow *flow; |
1241 | u32 bucket, obj; | |
1242 | ||
1243 | bucket = cb->args[0]; | |
1244 | obj = cb->args[1]; | |
850b6b3b | 1245 | flow = ovs_flow_tbl_next(table, &bucket, &obj); |
3544358a | 1246 | if (!flow) |
37a1300c BP |
1247 | break; |
1248 | ||
6455100f PS |
1249 | if (ovs_flow_cmd_fill_info(flow, dp, skb, |
1250 | NETLINK_CB(cb->skb).pid, | |
37a1300c | 1251 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1252 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1253 | break; |
1254 | ||
1255 | cb->args[0] = bucket; | |
1256 | cb->args[1] = obj; | |
1257 | } | |
1258 | return skb->len; | |
704a1e09 BP |
1259 | } |
1260 | ||
37a1300c | 1261 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1262 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1263 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1264 | .policy = flow_policy, | |
df2c07f4 | 1265 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1266 | }, |
df2c07f4 | 1267 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1268 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1269 | .policy = flow_policy, | |
df2c07f4 | 1270 | .doit = ovs_flow_cmd_del |
37a1300c | 1271 | }, |
df2c07f4 | 1272 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1273 | .flags = 0, /* OK for unprivileged users. */ |
1274 | .policy = flow_policy, | |
df2c07f4 JP |
1275 | .doit = ovs_flow_cmd_get, |
1276 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1277 | }, |
df2c07f4 | 1278 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1279 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1280 | .policy = flow_policy, | |
df2c07f4 | 1281 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1282 | }, |
1283 | }; | |
1284 | ||
df2c07f4 | 1285 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
aaff4b55 | 1286 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1287 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
aaff4b55 | 1288 | #endif |
b063d9f0 | 1289 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
d6569377 BP |
1290 | }; |
1291 | ||
aaff4b55 BP |
1292 | static struct genl_family dp_datapath_genl_family = { |
1293 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1294 | .hdrsize = sizeof(struct ovs_header), |
1295 | .name = OVS_DATAPATH_FAMILY, | |
69685a88 | 1296 | .version = OVS_DATAPATH_VERSION, |
2a4999f3 PS |
1297 | .maxattr = OVS_DP_ATTR_MAX, |
1298 | SET_NETNSOK | |
aaff4b55 BP |
1299 | }; |
1300 | ||
850b6b3b | 1301 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
df2c07f4 | 1302 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1303 | }; |
1304 | ||
df2c07f4 | 1305 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
aaff4b55 | 1306 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1307 | { |
df2c07f4 | 1308 | struct ovs_header *ovs_header; |
e926dfe3 | 1309 | struct ovs_dp_stats dp_stats; |
064af421 BP |
1310 | int err; |
1311 | ||
df2c07f4 | 1312 | ovs_header = genlmsg_put(skb, pid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1313 | flags, cmd); |
df2c07f4 | 1314 | if (!ovs_header) |
aaff4b55 | 1315 | goto error; |
064af421 | 1316 | |
b063d9f0 | 1317 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1318 | |
d6569377 | 1319 | rcu_read_lock(); |
850b6b3b | 1320 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
d6569377 | 1321 | rcu_read_unlock(); |
064af421 | 1322 | if (err) |
d6569377 | 1323 | goto nla_put_failure; |
064af421 | 1324 | |
e926dfe3 | 1325 | get_dp_stats(dp, &dp_stats); |
c3cc8c03 DM |
1326 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats)) |
1327 | goto nla_put_failure; | |
d6569377 | 1328 | |
df2c07f4 | 1329 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1330 | |
1331 | nla_put_failure: | |
df2c07f4 | 1332 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1333 | error: |
1334 | return -EMSGSIZE; | |
d6569377 BP |
1335 | } |
1336 | ||
df2c07f4 | 1337 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid, |
aaff4b55 | 1338 | u32 seq, u8 cmd) |
d6569377 | 1339 | { |
d6569377 | 1340 | struct sk_buff *skb; |
aaff4b55 | 1341 | int retval; |
d6569377 | 1342 | |
aaff4b55 | 1343 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
064af421 | 1344 | if (!skb) |
d6569377 | 1345 | return ERR_PTR(-ENOMEM); |
659586ef | 1346 | |
df2c07f4 | 1347 | retval = ovs_dp_cmd_fill_info(dp, skb, pid, seq, 0, cmd); |
aaff4b55 BP |
1348 | if (retval < 0) { |
1349 | kfree_skb(skb); | |
1350 | return ERR_PTR(retval); | |
1351 | } | |
1352 | return skb; | |
1353 | } | |
9dca7bd5 | 1354 | |
df2c07f4 | 1355 | static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
aaff4b55 | 1356 | { |
df2c07f4 | 1357 | return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1); |
d6569377 BP |
1358 | } |
1359 | ||
ed099e92 | 1360 | /* Called with genl_mutex and optionally with RTNL lock also. */ |
2a4999f3 PS |
1361 | static struct datapath *lookup_datapath(struct net *net, |
1362 | struct ovs_header *ovs_header, | |
6455100f | 1363 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1364 | { |
254f2dc8 BP |
1365 | struct datapath *dp; |
1366 | ||
df2c07f4 | 1367 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1368 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1369 | else { |
d6569377 | 1370 | struct vport *vport; |
d6569377 | 1371 | |
057dd6d2 | 1372 | rcu_read_lock(); |
2a4999f3 | 1373 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1374 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
057dd6d2 | 1375 | rcu_read_unlock(); |
d6569377 | 1376 | } |
254f2dc8 | 1377 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1378 | } |
1379 | ||
df2c07f4 | 1380 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1381 | { |
aaff4b55 | 1382 | struct nlattr **a = info->attrs; |
d6569377 | 1383 | struct vport_parms parms; |
aaff4b55 | 1384 | struct sk_buff *reply; |
d6569377 BP |
1385 | struct datapath *dp; |
1386 | struct vport *vport; | |
2a4999f3 | 1387 | struct ovs_net *ovs_net; |
95b1d73a | 1388 | int err, i; |
d6569377 | 1389 | |
d6569377 | 1390 | err = -EINVAL; |
ea36840f | 1391 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1392 | goto err; |
1393 | ||
df2c07f4 | 1394 | err = ovs_dp_cmd_validate(a); |
aaff4b55 BP |
1395 | if (err) |
1396 | goto err; | |
d6569377 BP |
1397 | |
1398 | rtnl_lock(); | |
d6569377 | 1399 | |
d6569377 BP |
1400 | err = -ENOMEM; |
1401 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1402 | if (dp == NULL) | |
2a4999f3 PS |
1403 | goto err_unlock_rtnl; |
1404 | ||
d6569377 BP |
1405 | /* Initialize kobject for bridge. This will be added as |
1406 | * /sys/class/net/<devname>/brif later, if sysfs is enabled. */ | |
1407 | dp->ifobj.kset = NULL; | |
1408 | kobject_init(&dp->ifobj, &dp_ktype); | |
1409 | ||
0ceaa66c JG |
1410 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1411 | ||
d6569377 BP |
1412 | /* Allocate table. */ |
1413 | err = -ENOMEM; | |
850b6b3b | 1414 | rcu_assign_pointer(dp->table, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS)); |
d6569377 BP |
1415 | if (!dp->table) |
1416 | goto err_free_dp; | |
1417 | ||
99769a40 JG |
1418 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); |
1419 | if (!dp->stats_percpu) { | |
1420 | err = -ENOMEM; | |
1421 | goto err_destroy_table; | |
1422 | } | |
1423 | ||
95b1d73a PS |
1424 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1425 | GFP_KERNEL); | |
1426 | if (!dp->ports) { | |
1427 | err = -ENOMEM; | |
1428 | goto err_destroy_percpu; | |
1429 | } | |
1430 | ||
1431 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1432 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1433 | ||
d6569377 | 1434 | /* Set up our datapath device. */ |
df2c07f4 JP |
1435 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1436 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1437 | parms.options = NULL; |
1438 | parms.dp = dp; | |
df2c07f4 | 1439 | parms.port_no = OVSP_LOCAL; |
ea36840f | 1440 | parms.upcall_pid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
b063d9f0 | 1441 | |
d6569377 BP |
1442 | vport = new_vport(&parms); |
1443 | if (IS_ERR(vport)) { | |
1444 | err = PTR_ERR(vport); | |
1445 | if (err == -EBUSY) | |
1446 | err = -EEXIST; | |
1447 | ||
95b1d73a | 1448 | goto err_destroy_ports_array; |
d6569377 | 1449 | } |
d6569377 | 1450 | |
6455100f PS |
1451 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, |
1452 | info->snd_seq, OVS_DP_CMD_NEW); | |
aaff4b55 BP |
1453 | err = PTR_ERR(reply); |
1454 | if (IS_ERR(reply)) | |
1455 | goto err_destroy_local_port; | |
1456 | ||
2a4999f3 PS |
1457 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
1458 | list_add_tail(&dp->list_node, &ovs_net->dps); | |
850b6b3b | 1459 | ovs_dp_sysfs_add_dp(dp); |
d6569377 | 1460 | |
d6569377 BP |
1461 | rtnl_unlock(); |
1462 | ||
aaff4b55 | 1463 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
850b6b3b JG |
1464 | ovs_dp_datapath_multicast_group.id, info->nlhdr, |
1465 | GFP_KERNEL); | |
d6569377 BP |
1466 | return 0; |
1467 | ||
1468 | err_destroy_local_port: | |
95b1d73a PS |
1469 | ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL)); |
1470 | err_destroy_ports_array: | |
1471 | kfree(dp->ports); | |
99769a40 JG |
1472 | err_destroy_percpu: |
1473 | free_percpu(dp->stats_percpu); | |
d6569377 | 1474 | err_destroy_table: |
850b6b3b | 1475 | ovs_flow_tbl_destroy(genl_dereference(dp->table)); |
d6569377 | 1476 | err_free_dp: |
0ceaa66c | 1477 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1478 | kfree(dp); |
ed099e92 | 1479 | err_unlock_rtnl: |
d6569377 | 1480 | rtnl_unlock(); |
d6569377 | 1481 | err: |
064af421 BP |
1482 | return err; |
1483 | } | |
1484 | ||
2a4999f3 PS |
1485 | /* Called with genl_mutex. */ |
1486 | static void __dp_destroy(struct datapath *dp) | |
44e05eca | 1487 | { |
95b1d73a | 1488 | int i; |
44e05eca | 1489 | |
d6569377 | 1490 | rtnl_lock(); |
95b1d73a PS |
1491 | |
1492 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1493 | struct vport *vport; | |
1494 | struct hlist_node *node, *n; | |
1495 | ||
1496 | hlist_for_each_entry_safe(vport, node, n, &dp->ports[i], dp_hash_node) | |
1497 | if (vport->port_no != OVSP_LOCAL) | |
1498 | ovs_dp_detach_port(vport); | |
1499 | } | |
ed099e92 | 1500 | |
850b6b3b | 1501 | ovs_dp_sysfs_del_dp(dp); |
254f2dc8 | 1502 | list_del(&dp->list_node); |
95b1d73a | 1503 | ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL)); |
ed099e92 | 1504 | |
99620d2c JG |
1505 | /* rtnl_unlock() will wait until all the references to devices that |
1506 | * are pending unregistration have been dropped. We do it here to | |
1507 | * ensure that any internal devices (which contain DP pointers) are | |
1508 | * fully destroyed before freeing the datapath. | |
1509 | */ | |
1510 | rtnl_unlock(); | |
1511 | ||
ed099e92 | 1512 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1513 | } |
1514 | ||
1515 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1516 | { | |
1517 | struct sk_buff *reply; | |
1518 | struct datapath *dp; | |
1519 | int err; | |
1520 | ||
1521 | err = ovs_dp_cmd_validate(info->attrs); | |
1522 | if (err) | |
1523 | return err; | |
1524 | ||
1525 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
1526 | err = PTR_ERR(dp); | |
1527 | if (IS_ERR(dp)) | |
1528 | return err; | |
1529 | ||
1530 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, | |
1531 | info->snd_seq, OVS_DP_CMD_DEL); | |
1532 | err = PTR_ERR(reply); | |
1533 | if (IS_ERR(reply)) | |
1534 | return err; | |
1535 | ||
1536 | __dp_destroy(dp); | |
ed099e92 | 1537 | |
aaff4b55 | 1538 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
850b6b3b JG |
1539 | ovs_dp_datapath_multicast_group.id, info->nlhdr, |
1540 | GFP_KERNEL); | |
99620d2c JG |
1541 | |
1542 | return 0; | |
44e05eca BP |
1543 | } |
1544 | ||
df2c07f4 | 1545 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1546 | { |
aaff4b55 | 1547 | struct sk_buff *reply; |
d6569377 | 1548 | struct datapath *dp; |
d6569377 | 1549 | int err; |
064af421 | 1550 | |
df2c07f4 | 1551 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1552 | if (err) |
1553 | return err; | |
38c6ecbc | 1554 | |
2a4999f3 | 1555 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
d6569377 | 1556 | if (IS_ERR(dp)) |
aaff4b55 | 1557 | return PTR_ERR(dp); |
38c6ecbc | 1558 | |
6455100f PS |
1559 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, |
1560 | info->snd_seq, OVS_DP_CMD_NEW); | |
aaff4b55 BP |
1561 | if (IS_ERR(reply)) { |
1562 | err = PTR_ERR(reply); | |
2a4999f3 | 1563 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
850b6b3b | 1564 | ovs_dp_datapath_multicast_group.id, err); |
aaff4b55 BP |
1565 | return 0; |
1566 | } | |
1567 | ||
1568 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
850b6b3b JG |
1569 | ovs_dp_datapath_multicast_group.id, info->nlhdr, |
1570 | GFP_KERNEL); | |
1571 | ||
aaff4b55 | 1572 | return 0; |
064af421 BP |
1573 | } |
1574 | ||
df2c07f4 | 1575 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1576 | { |
aaff4b55 | 1577 | struct sk_buff *reply; |
d6569377 | 1578 | struct datapath *dp; |
d6569377 | 1579 | int err; |
1dcf111b | 1580 | |
df2c07f4 | 1581 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1582 | if (err) |
1583 | return err; | |
1dcf111b | 1584 | |
2a4999f3 | 1585 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
d6569377 | 1586 | if (IS_ERR(dp)) |
aaff4b55 | 1587 | return PTR_ERR(dp); |
1dcf111b | 1588 | |
6455100f PS |
1589 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, |
1590 | info->snd_seq, OVS_DP_CMD_NEW); | |
aaff4b55 BP |
1591 | if (IS_ERR(reply)) |
1592 | return PTR_ERR(reply); | |
1593 | ||
1594 | return genlmsg_reply(reply, info); | |
1dcf111b JP |
1595 | } |
1596 | ||
df2c07f4 | 1597 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1598 | { |
2a4999f3 | 1599 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1600 | struct datapath *dp; |
1601 | int skip = cb->args[0]; | |
1602 | int i = 0; | |
a7786963 | 1603 | |
2a4999f3 | 1604 | list_for_each_entry(dp, &ovs_net->dps, list_node) { |
a2bab2f0 BP |
1605 | if (i >= skip && |
1606 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid, | |
aaff4b55 | 1607 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1608 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1609 | break; |
254f2dc8 | 1610 | i++; |
a7786963 | 1611 | } |
aaff4b55 | 1612 | |
254f2dc8 BP |
1613 | cb->args[0] = i; |
1614 | ||
aaff4b55 | 1615 | return skb->len; |
c19e6535 BP |
1616 | } |
1617 | ||
aaff4b55 | 1618 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1619 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1620 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1621 | .policy = datapath_policy, | |
df2c07f4 | 1622 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1623 | }, |
df2c07f4 | 1624 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1625 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1626 | .policy = datapath_policy, | |
df2c07f4 | 1627 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1628 | }, |
df2c07f4 | 1629 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1630 | .flags = 0, /* OK for unprivileged users. */ |
1631 | .policy = datapath_policy, | |
df2c07f4 JP |
1632 | .doit = ovs_dp_cmd_get, |
1633 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1634 | }, |
df2c07f4 | 1635 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1636 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1637 | .policy = datapath_policy, | |
df2c07f4 | 1638 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1639 | }, |
1640 | }; | |
1641 | ||
df2c07f4 | 1642 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
f0fef760 | 1643 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1644 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1645 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1646 | [OVS_VPORT_ATTR_ADDRESS] = { .len = ETH_ALEN }, |
f0fef760 | 1647 | #else |
f613a0d7 | 1648 | [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1649 | [OVS_VPORT_ATTR_ADDRESS] = { .minlen = ETH_ALEN }, |
f0fef760 | 1650 | #endif |
d48c88ec JG |
1651 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1652 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1653 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1654 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1655 | }; |
1656 | ||
f0fef760 BP |
1657 | static struct genl_family dp_vport_genl_family = { |
1658 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1659 | .hdrsize = sizeof(struct ovs_header), |
1660 | .name = OVS_VPORT_FAMILY, | |
69685a88 | 1661 | .version = OVS_VPORT_VERSION, |
2a4999f3 PS |
1662 | .maxattr = OVS_VPORT_ATTR_MAX, |
1663 | SET_NETNSOK | |
f0fef760 BP |
1664 | }; |
1665 | ||
850b6b3b | 1666 | struct genl_multicast_group ovs_dp_vport_multicast_group = { |
df2c07f4 | 1667 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1668 | }; |
1669 | ||
1670 | /* Called with RTNL lock or RCU read lock. */ | |
df2c07f4 | 1671 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
f0fef760 | 1672 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1673 | { |
df2c07f4 | 1674 | struct ovs_header *ovs_header; |
e926dfe3 | 1675 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1676 | int err; |
1677 | ||
df2c07f4 | 1678 | ovs_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family, |
f0fef760 | 1679 | flags, cmd); |
df2c07f4 | 1680 | if (!ovs_header) |
f0fef760 | 1681 | return -EMSGSIZE; |
c19e6535 | 1682 | |
99769a40 | 1683 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1684 | |
c3cc8c03 DM |
1685 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1686 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
1687 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || | |
1688 | nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_pid)) | |
1689 | goto nla_put_failure; | |
c19e6535 | 1690 | |
850b6b3b | 1691 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1692 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1693 | &vport_stats)) | |
1694 | goto nla_put_failure; | |
c19e6535 | 1695 | |
c3cc8c03 DM |
1696 | if (nla_put(skb, OVS_VPORT_ATTR_ADDRESS, ETH_ALEN, |
1697 | vport->ops->get_addr(vport))) | |
1698 | goto nla_put_failure; | |
c19e6535 | 1699 | |
850b6b3b | 1700 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1701 | if (err == -EMSGSIZE) |
1702 | goto error; | |
c19e6535 | 1703 | |
df2c07f4 | 1704 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1705 | |
1706 | nla_put_failure: | |
1707 | err = -EMSGSIZE; | |
f0fef760 | 1708 | error: |
df2c07f4 | 1709 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1710 | return err; |
064af421 BP |
1711 | } |
1712 | ||
f0fef760 | 1713 | /* Called with RTNL lock or RCU read lock. */ |
f14d8083 EJ |
1714 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid, |
1715 | u32 seq, u8 cmd) | |
064af421 | 1716 | { |
c19e6535 | 1717 | struct sk_buff *skb; |
f0fef760 | 1718 | int retval; |
c19e6535 | 1719 | |
f0fef760 | 1720 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1721 | if (!skb) |
1722 | return ERR_PTR(-ENOMEM); | |
1723 | ||
df2c07f4 | 1724 | retval = ovs_vport_cmd_fill_info(vport, skb, pid, seq, 0, cmd); |
f0fef760 BP |
1725 | if (retval < 0) { |
1726 | kfree_skb(skb); | |
1727 | return ERR_PTR(retval); | |
1728 | } | |
c19e6535 | 1729 | return skb; |
f0fef760 | 1730 | } |
c19e6535 | 1731 | |
df2c07f4 | 1732 | static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
f0fef760 | 1733 | { |
df2c07f4 | 1734 | return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1); |
c19e6535 | 1735 | } |
51d4d598 | 1736 | |
ed099e92 | 1737 | /* Called with RTNL lock or RCU read lock. */ |
2a4999f3 PS |
1738 | static struct vport *lookup_vport(struct net *net, |
1739 | struct ovs_header *ovs_header, | |
df2c07f4 | 1740 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1741 | { |
1742 | struct datapath *dp; | |
1743 | struct vport *vport; | |
1744 | ||
df2c07f4 | 1745 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1746 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1747 | if (!vport) |
c19e6535 | 1748 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1749 | if (ovs_header->dp_ifindex && |
1750 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1751 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1752 | return vport; |
df2c07f4 JP |
1753 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1754 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1755 | |
1756 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1757 | return ERR_PTR(-EFBIG); |
c19e6535 | 1758 | |
2a4999f3 | 1759 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1760 | if (!dp) |
1761 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1762 | |
95b1d73a | 1763 | vport = ovs_vport_rtnl_rcu(dp, port_no); |
ed099e92 | 1764 | if (!vport) |
c19e6535 | 1765 | return ERR_PTR(-ENOENT); |
c19e6535 BP |
1766 | return vport; |
1767 | } else | |
1768 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1769 | } |
1770 | ||
ed099e92 | 1771 | /* Called with RTNL lock. */ |
6455100f PS |
1772 | static int change_vport(struct vport *vport, |
1773 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) | |
064af421 | 1774 | { |
c19e6535 | 1775 | int err = 0; |
f613a0d7 | 1776 | |
df2c07f4 | 1777 | if (a[OVS_VPORT_ATTR_STATS]) |
850b6b3b | 1778 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); |
f613a0d7 PS |
1779 | |
1780 | if (a[OVS_VPORT_ATTR_ADDRESS]) | |
850b6b3b | 1781 | err = ovs_vport_set_addr(vport, nla_data(a[OVS_VPORT_ATTR_ADDRESS])); |
f613a0d7 | 1782 | |
c19e6535 BP |
1783 | return err; |
1784 | } | |
1785 | ||
df2c07f4 | 1786 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1787 | { |
f0fef760 | 1788 | struct nlattr **a = info->attrs; |
df2c07f4 | 1789 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1790 | struct vport_parms parms; |
ed099e92 | 1791 | struct sk_buff *reply; |
c19e6535 | 1792 | struct vport *vport; |
c19e6535 | 1793 | struct datapath *dp; |
b0ec0f27 | 1794 | u32 port_no; |
c19e6535 | 1795 | int err; |
b0ec0f27 | 1796 | |
c19e6535 | 1797 | err = -EINVAL; |
ea36840f BP |
1798 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1799 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
f0fef760 BP |
1800 | goto exit; |
1801 | ||
df2c07f4 | 1802 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1803 | if (err) |
1804 | goto exit; | |
51d4d598 | 1805 | |
c19e6535 | 1806 | rtnl_lock(); |
2a4999f3 | 1807 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1808 | err = -ENODEV; |
1809 | if (!dp) | |
ed099e92 | 1810 | goto exit_unlock; |
c19e6535 | 1811 | |
df2c07f4 JP |
1812 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1813 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1814 | |
1815 | err = -EFBIG; | |
1816 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 1817 | goto exit_unlock; |
c19e6535 | 1818 | |
95b1d73a | 1819 | vport = ovs_vport_rtnl(dp, port_no); |
c19e6535 BP |
1820 | err = -EBUSY; |
1821 | if (vport) | |
ed099e92 | 1822 | goto exit_unlock; |
c19e6535 BP |
1823 | } else { |
1824 | for (port_no = 1; ; port_no++) { | |
1825 | if (port_no >= DP_MAX_PORTS) { | |
1826 | err = -EFBIG; | |
ed099e92 | 1827 | goto exit_unlock; |
c19e6535 | 1828 | } |
95b1d73a | 1829 | vport = ovs_vport_rtnl(dp, port_no); |
c19e6535 BP |
1830 | if (!vport) |
1831 | break; | |
51d4d598 | 1832 | } |
064af421 | 1833 | } |
b0ec0f27 | 1834 | |
df2c07f4 JP |
1835 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1836 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1837 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1838 | parms.dp = dp; |
1839 | parms.port_no = port_no; | |
ea36840f | 1840 | parms.upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 BP |
1841 | |
1842 | vport = new_vport(&parms); | |
1843 | err = PTR_ERR(vport); | |
1844 | if (IS_ERR(vport)) | |
ed099e92 | 1845 | goto exit_unlock; |
c19e6535 | 1846 | |
850b6b3b | 1847 | ovs_dp_sysfs_add_if(vport); |
c19e6535 BP |
1848 | |
1849 | err = change_vport(vport, a); | |
f0fef760 | 1850 | if (!err) { |
df2c07f4 | 1851 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, |
6455100f PS |
1852 | info->snd_seq, |
1853 | OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1854 | if (IS_ERR(reply)) |
1855 | err = PTR_ERR(reply); | |
1856 | } | |
c19e6535 | 1857 | if (err) { |
850b6b3b | 1858 | ovs_dp_detach_port(vport); |
ed099e92 | 1859 | goto exit_unlock; |
c19e6535 | 1860 | } |
f0fef760 | 1861 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
850b6b3b | 1862 | ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); |
c19e6535 | 1863 | |
ed099e92 | 1864 | exit_unlock: |
c19e6535 | 1865 | rtnl_unlock(); |
c19e6535 BP |
1866 | exit: |
1867 | return err; | |
44e05eca BP |
1868 | } |
1869 | ||
df2c07f4 | 1870 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1871 | { |
f0fef760 BP |
1872 | struct nlattr **a = info->attrs; |
1873 | struct sk_buff *reply; | |
c19e6535 | 1874 | struct vport *vport; |
c19e6535 | 1875 | int err; |
44e05eca | 1876 | |
df2c07f4 | 1877 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1878 | if (err) |
c19e6535 BP |
1879 | goto exit; |
1880 | ||
1881 | rtnl_lock(); | |
2a4999f3 | 1882 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
1883 | err = PTR_ERR(vport); |
1884 | if (IS_ERR(vport)) | |
f0fef760 | 1885 | goto exit_unlock; |
44e05eca | 1886 | |
c19e6535 | 1887 | err = 0; |
6455100f | 1888 | if (a[OVS_VPORT_ATTR_TYPE] && |
16b82e84 | 1889 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) |
4879d4c7 | 1890 | err = -EINVAL; |
6455100f | 1891 | |
4879d4c7 | 1892 | if (!err && a[OVS_VPORT_ATTR_OPTIONS]) |
850b6b3b | 1893 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
c19e6535 BP |
1894 | if (!err) |
1895 | err = change_vport(vport, a); | |
53509ad5 AA |
1896 | else |
1897 | goto exit_unlock; | |
b063d9f0 JG |
1898 | if (!err && a[OVS_VPORT_ATTR_UPCALL_PID]) |
1899 | vport->upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); | |
c19e6535 | 1900 | |
df2c07f4 JP |
1901 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1902 | OVS_VPORT_CMD_NEW); | |
f0fef760 | 1903 | if (IS_ERR(reply)) { |
2a4999f3 | 1904 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
7a6c067d AA |
1905 | ovs_dp_vport_multicast_group.id, PTR_ERR(reply)); |
1906 | goto exit_unlock; | |
f0fef760 BP |
1907 | } |
1908 | ||
1909 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
850b6b3b | 1910 | ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); |
f0fef760 BP |
1911 | |
1912 | exit_unlock: | |
c19e6535 BP |
1913 | rtnl_unlock(); |
1914 | exit: | |
1915 | return err; | |
064af421 BP |
1916 | } |
1917 | ||
df2c07f4 | 1918 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1919 | { |
f0fef760 BP |
1920 | struct nlattr **a = info->attrs; |
1921 | struct sk_buff *reply; | |
c19e6535 | 1922 | struct vport *vport; |
c19e6535 BP |
1923 | int err; |
1924 | ||
df2c07f4 | 1925 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1926 | if (err) |
c19e6535 BP |
1927 | goto exit; |
1928 | ||
1929 | rtnl_lock(); | |
2a4999f3 | 1930 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 1931 | err = PTR_ERR(vport); |
f0fef760 BP |
1932 | if (IS_ERR(vport)) |
1933 | goto exit_unlock; | |
c19e6535 | 1934 | |
df2c07f4 | 1935 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
1936 | err = -EINVAL; |
1937 | goto exit_unlock; | |
1938 | } | |
1939 | ||
df2c07f4 JP |
1940 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1941 | OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
1942 | err = PTR_ERR(reply); |
1943 | if (IS_ERR(reply)) | |
1944 | goto exit_unlock; | |
1945 | ||
850b6b3b | 1946 | ovs_dp_detach_port(vport); |
f0fef760 BP |
1947 | |
1948 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
850b6b3b | 1949 | ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); |
f0fef760 BP |
1950 | |
1951 | exit_unlock: | |
c19e6535 BP |
1952 | rtnl_unlock(); |
1953 | exit: | |
1954 | return err; | |
7c40efc9 BP |
1955 | } |
1956 | ||
df2c07f4 | 1957 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1958 | { |
f0fef760 | 1959 | struct nlattr **a = info->attrs; |
df2c07f4 | 1960 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 1961 | struct sk_buff *reply; |
c19e6535 | 1962 | struct vport *vport; |
c19e6535 BP |
1963 | int err; |
1964 | ||
df2c07f4 | 1965 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1966 | if (err) |
1967 | goto exit; | |
c19e6535 | 1968 | |
ed099e92 | 1969 | rcu_read_lock(); |
2a4999f3 | 1970 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
1971 | err = PTR_ERR(vport); |
1972 | if (IS_ERR(vport)) | |
f0fef760 | 1973 | goto exit_unlock; |
c19e6535 | 1974 | |
df2c07f4 JP |
1975 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1976 | OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
1977 | err = PTR_ERR(reply); |
1978 | if (IS_ERR(reply)) | |
f0fef760 | 1979 | goto exit_unlock; |
ed099e92 | 1980 | |
df2fa9b5 JG |
1981 | rcu_read_unlock(); |
1982 | ||
1983 | return genlmsg_reply(reply, info); | |
ed099e92 | 1984 | |
f0fef760 | 1985 | exit_unlock: |
ed099e92 | 1986 | rcu_read_unlock(); |
f0fef760 | 1987 | exit: |
c19e6535 BP |
1988 | return err; |
1989 | } | |
1990 | ||
df2c07f4 | 1991 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 1992 | { |
df2c07f4 | 1993 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 1994 | struct datapath *dp; |
95b1d73a PS |
1995 | int bucket = cb->args[0], skip = cb->args[1]; |
1996 | int i, j = 0; | |
c19e6535 | 1997 | |
2a4999f3 | 1998 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 | 1999 | if (!dp) |
f0fef760 | 2000 | return -ENODEV; |
ed099e92 BP |
2001 | |
2002 | rcu_read_lock(); | |
95b1d73a | 2003 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2004 | struct vport *vport; |
95b1d73a PS |
2005 | struct hlist_node *n; |
2006 | ||
2007 | j = 0; | |
2008 | hlist_for_each_entry_rcu(vport, n, &dp->ports[i], dp_hash_node) { | |
2009 | if (j >= skip && | |
2010 | ovs_vport_cmd_fill_info(vport, skb, | |
2011 | NETLINK_CB(cb->skb).pid, | |
2012 | cb->nlh->nlmsg_seq, | |
2013 | NLM_F_MULTI, | |
2014 | OVS_VPORT_CMD_NEW) < 0) | |
2015 | goto out; | |
2016 | ||
2017 | j++; | |
2018 | } | |
2019 | skip = 0; | |
c19e6535 | 2020 | } |
95b1d73a | 2021 | out: |
ed099e92 | 2022 | rcu_read_unlock(); |
c19e6535 | 2023 | |
95b1d73a PS |
2024 | cb->args[0] = i; |
2025 | cb->args[1] = j; | |
f0fef760 | 2026 | |
95b1d73a | 2027 | return skb->len; |
7c40efc9 BP |
2028 | } |
2029 | ||
f0fef760 | 2030 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2031 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
2032 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2033 | .policy = vport_policy, | |
df2c07f4 | 2034 | .doit = ovs_vport_cmd_new |
f0fef760 | 2035 | }, |
df2c07f4 | 2036 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
2037 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2038 | .policy = vport_policy, | |
df2c07f4 | 2039 | .doit = ovs_vport_cmd_del |
f0fef760 | 2040 | }, |
df2c07f4 | 2041 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2042 | .flags = 0, /* OK for unprivileged users. */ |
2043 | .policy = vport_policy, | |
df2c07f4 JP |
2044 | .doit = ovs_vport_cmd_get, |
2045 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2046 | }, |
df2c07f4 | 2047 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
2048 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2049 | .policy = vport_policy, | |
df2c07f4 | 2050 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2051 | }, |
2052 | }; | |
2053 | ||
982b8810 BP |
2054 | struct genl_family_and_ops { |
2055 | struct genl_family *family; | |
2056 | struct genl_ops *ops; | |
2057 | int n_ops; | |
2058 | struct genl_multicast_group *group; | |
2059 | }; | |
ed099e92 | 2060 | |
982b8810 | 2061 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
2062 | { &dp_datapath_genl_family, |
2063 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
850b6b3b | 2064 | &ovs_dp_datapath_multicast_group }, |
f0fef760 BP |
2065 | { &dp_vport_genl_family, |
2066 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
850b6b3b | 2067 | &ovs_dp_vport_multicast_group }, |
37a1300c BP |
2068 | { &dp_flow_genl_family, |
2069 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
850b6b3b | 2070 | &ovs_dp_flow_multicast_group }, |
982b8810 BP |
2071 | { &dp_packet_genl_family, |
2072 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
2073 | NULL }, | |
2074 | }; | |
ed099e92 | 2075 | |
982b8810 BP |
2076 | static void dp_unregister_genl(int n_families) |
2077 | { | |
2078 | int i; | |
ed099e92 | 2079 | |
b867ca75 | 2080 | for (i = 0; i < n_families; i++) |
982b8810 | 2081 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
2082 | } |
2083 | ||
982b8810 | 2084 | static int dp_register_genl(void) |
064af421 | 2085 | { |
982b8810 BP |
2086 | int n_registered; |
2087 | int err; | |
2088 | int i; | |
064af421 | 2089 | |
982b8810 BP |
2090 | n_registered = 0; |
2091 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2092 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 2093 | |
982b8810 BP |
2094 | err = genl_register_family_with_ops(f->family, f->ops, |
2095 | f->n_ops); | |
2096 | if (err) | |
2097 | goto error; | |
2098 | n_registered++; | |
e22d4953 | 2099 | |
982b8810 BP |
2100 | if (f->group) { |
2101 | err = genl_register_mc_group(f->family, f->group); | |
2102 | if (err) | |
2103 | goto error; | |
2104 | } | |
2105 | } | |
9cc8b4e4 | 2106 | |
982b8810 | 2107 | return 0; |
064af421 BP |
2108 | |
2109 | error: | |
982b8810 BP |
2110 | dp_unregister_genl(n_registered); |
2111 | return err; | |
064af421 BP |
2112 | } |
2113 | ||
acd051f1 PS |
2114 | static int __rehash_flow_table(void *dummy) |
2115 | { | |
2116 | struct datapath *dp; | |
2a4999f3 PS |
2117 | struct net *net; |
2118 | ||
2119 | rtnl_lock(); | |
2120 | for_each_net(net) { | |
2121 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
acd051f1 | 2122 | |
2a4999f3 PS |
2123 | list_for_each_entry(dp, &ovs_net->dps, list_node) { |
2124 | struct flow_table *old_table = genl_dereference(dp->table); | |
2125 | struct flow_table *new_table; | |
acd051f1 | 2126 | |
2a4999f3 PS |
2127 | new_table = ovs_flow_tbl_rehash(old_table); |
2128 | if (!IS_ERR(new_table)) { | |
2129 | rcu_assign_pointer(dp->table, new_table); | |
2130 | ovs_flow_tbl_deferred_destroy(old_table); | |
2131 | } | |
acd051f1 PS |
2132 | } |
2133 | } | |
2a4999f3 | 2134 | rtnl_unlock(); |
acd051f1 PS |
2135 | return 0; |
2136 | } | |
2137 | ||
2138 | static void rehash_flow_table(struct work_struct *work) | |
2139 | { | |
2140 | genl_exec(__rehash_flow_table, NULL); | |
2141 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); | |
2142 | } | |
2143 | ||
2a4999f3 PS |
2144 | static int dp_destroy_all(void *data) |
2145 | { | |
2146 | struct datapath *dp, *dp_next; | |
2147 | struct ovs_net *ovs_net = data; | |
2148 | ||
2149 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2150 | __dp_destroy(dp); | |
2151 | ||
2152 | return 0; | |
2153 | } | |
2154 | ||
2155 | static int __net_init ovs_init_net(struct net *net) | |
2156 | { | |
2157 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2158 | ||
2159 | INIT_LIST_HEAD(&ovs_net->dps); | |
2160 | return 0; | |
2161 | } | |
2162 | ||
2163 | static void __net_exit ovs_exit_net(struct net *net) | |
2164 | { | |
2165 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2166 | ||
2167 | genl_exec(dp_destroy_all, ovs_net); | |
2168 | } | |
2169 | ||
2170 | static struct pernet_operations ovs_net_ops = { | |
2171 | .init = ovs_init_net, | |
2172 | .exit = ovs_exit_net, | |
2173 | .id = &ovs_net_id, | |
2174 | .size = sizeof(struct ovs_net), | |
2175 | }; | |
2176 | ||
22d24ebf BP |
2177 | static int __init dp_init(void) |
2178 | { | |
f2459fe7 | 2179 | struct sk_buff *dummy_skb; |
22d24ebf BP |
2180 | int err; |
2181 | ||
f2459fe7 | 2182 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb)); |
22d24ebf | 2183 | |
dc5f3fef | 2184 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 2185 | VERSION); |
064af421 | 2186 | |
b9c15df9 | 2187 | err = genl_exec_init(); |
064af421 BP |
2188 | if (err) |
2189 | goto error; | |
2190 | ||
16d650e5 | 2191 | err = ovs_workqueues_init(); |
b9c15df9 PS |
2192 | if (err) |
2193 | goto error_genl_exec; | |
2194 | ||
16d650e5 PS |
2195 | err = ovs_tnl_init(); |
2196 | if (err) | |
2197 | goto error_wq; | |
2198 | ||
850b6b3b | 2199 | err = ovs_flow_init(); |
3544358a PS |
2200 | if (err) |
2201 | goto error_tnl_exit; | |
2202 | ||
850b6b3b | 2203 | err = ovs_vport_init(); |
064af421 BP |
2204 | if (err) |
2205 | goto error_flow_exit; | |
2206 | ||
2a4999f3 | 2207 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2208 | if (err) |
2209 | goto error_vport_exit; | |
2210 | ||
2a4999f3 PS |
2211 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2212 | if (err) | |
2213 | goto error_netns_exit; | |
2214 | ||
982b8810 BP |
2215 | err = dp_register_genl(); |
2216 | if (err < 0) | |
37a1300c | 2217 | goto error_unreg_notifier; |
982b8810 | 2218 | |
acd051f1 PS |
2219 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); |
2220 | ||
064af421 BP |
2221 | return 0; |
2222 | ||
2223 | error_unreg_notifier: | |
850b6b3b | 2224 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2225 | error_netns_exit: |
2226 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2227 | error_vport_exit: |
850b6b3b | 2228 | ovs_vport_exit(); |
064af421 | 2229 | error_flow_exit: |
850b6b3b | 2230 | ovs_flow_exit(); |
3544358a | 2231 | error_tnl_exit: |
850b6b3b | 2232 | ovs_tnl_exit(); |
16d650e5 PS |
2233 | error_wq: |
2234 | ovs_workqueues_exit(); | |
b9c15df9 PS |
2235 | error_genl_exec: |
2236 | genl_exec_exit(); | |
064af421 BP |
2237 | error: |
2238 | return err; | |
2239 | } | |
2240 | ||
2241 | static void dp_cleanup(void) | |
2242 | { | |
acd051f1 | 2243 | cancel_delayed_work_sync(&rehash_flow_wq); |
982b8810 | 2244 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
850b6b3b | 2245 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2246 | unregister_pernet_device(&ovs_net_ops); |
2247 | rcu_barrier(); | |
850b6b3b JG |
2248 | ovs_vport_exit(); |
2249 | ovs_flow_exit(); | |
2250 | ovs_tnl_exit(); | |
16d650e5 | 2251 | ovs_workqueues_exit(); |
b9c15df9 | 2252 | genl_exec_exit(); |
064af421 BP |
2253 | } |
2254 | ||
2255 | module_init(dp_init); | |
2256 | module_exit(dp_cleanup); | |
2257 | ||
2258 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2259 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2260 | MODULE_VERSION(VERSION); |