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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) || \ |
64807dfb JP |
64 | LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0) |
65 | #error Kernels before 2.6.18 or after 3.8 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 | ||
e297c6b7 TG |
74 | static void ovs_notify(struct sk_buff *skb, struct genl_info *info, |
75 | struct genl_multicast_group *grp) | |
76 | { | |
77 | genl_notify(skb, genl_info_net(info), info->snd_portid, | |
78 | grp->id, info->nlhdr, GFP_KERNEL); | |
79 | } | |
80 | ||
ed099e92 BP |
81 | /** |
82 | * DOC: Locking: | |
064af421 | 83 | * |
ed099e92 BP |
84 | * Writes to device state (add/remove datapath, port, set operations on vports, |
85 | * etc.) are protected by RTNL. | |
064af421 | 86 | * |
ed099e92 | 87 | * Writes to other state (flow table modifications, set miscellaneous datapath |
7257b535 BP |
88 | * parameters, etc.) are protected by genl_mutex. The RTNL lock nests inside |
89 | * genl_mutex. | |
ed099e92 BP |
90 | * |
91 | * Reads are protected by RCU. | |
92 | * | |
93 | * There are a few special cases (mostly stats) that have their own | |
94 | * synchronization but they nest under all of above and don't interact with | |
95 | * each other. | |
064af421 | 96 | */ |
ed099e92 | 97 | |
c19e6535 | 98 | static struct vport *new_vport(const struct vport_parms *); |
2a4999f3 | 99 | static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *, |
7257b535 | 100 | const struct dp_upcall_info *); |
2a4999f3 PS |
101 | static int queue_userspace_packet(struct net *, int dp_ifindex, |
102 | struct sk_buff *, | |
7257b535 | 103 | const struct dp_upcall_info *); |
064af421 | 104 | |
ed099e92 | 105 | /* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */ |
2a4999f3 | 106 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
064af421 | 107 | { |
254f2dc8 BP |
108 | struct datapath *dp = NULL; |
109 | struct net_device *dev; | |
ed099e92 | 110 | |
254f2dc8 | 111 | rcu_read_lock(); |
2a4999f3 | 112 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
254f2dc8 | 113 | if (dev) { |
850b6b3b | 114 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 BP |
115 | if (vport) |
116 | dp = vport->dp; | |
117 | } | |
118 | rcu_read_unlock(); | |
119 | ||
120 | return dp; | |
064af421 | 121 | } |
064af421 | 122 | |
f2459fe7 | 123 | /* Must be called with rcu_read_lock or RTNL lock. */ |
850b6b3b | 124 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 125 | { |
95b1d73a | 126 | struct vport *vport = ovs_vport_rtnl_rcu(dp, OVSP_LOCAL); |
16b82e84 | 127 | return vport->ops->get_name(vport); |
f2459fe7 JG |
128 | } |
129 | ||
99769a40 JG |
130 | static int get_dpifindex(struct datapath *dp) |
131 | { | |
132 | struct vport *local; | |
133 | int ifindex; | |
134 | ||
135 | rcu_read_lock(); | |
136 | ||
95b1d73a | 137 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 138 | if (local) |
16b82e84 | 139 | ifindex = local->ops->get_ifindex(local); |
99769a40 JG |
140 | else |
141 | ifindex = 0; | |
142 | ||
143 | rcu_read_unlock(); | |
144 | ||
145 | return ifindex; | |
146 | } | |
147 | ||
46c6a11d JG |
148 | static void destroy_dp_rcu(struct rcu_head *rcu) |
149 | { | |
150 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 151 | |
850b6b3b | 152 | ovs_flow_tbl_destroy((__force struct flow_table *)dp->table); |
46c6a11d | 153 | free_percpu(dp->stats_percpu); |
2a4999f3 | 154 | release_net(ovs_dp_get_net(dp)); |
95b1d73a | 155 | kfree(dp->ports); |
5ca1ba48 | 156 | kfree(dp); |
46c6a11d JG |
157 | } |
158 | ||
95b1d73a PS |
159 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
160 | u16 port_no) | |
161 | { | |
162 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
163 | } | |
164 | ||
165 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) | |
166 | { | |
167 | struct vport *vport; | |
95b1d73a PS |
168 | struct hlist_head *head; |
169 | ||
170 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 171 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
172 | if (vport->port_no == port_no) |
173 | return vport; | |
174 | } | |
175 | return NULL; | |
176 | } | |
177 | ||
ed099e92 | 178 | /* Called with RTNL lock and genl_lock. */ |
c19e6535 | 179 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 180 | { |
f2459fe7 | 181 | struct vport *vport; |
f2459fe7 | 182 | |
850b6b3b | 183 | vport = ovs_vport_add(parms); |
c19e6535 BP |
184 | if (!IS_ERR(vport)) { |
185 | struct datapath *dp = parms->dp; | |
95b1d73a | 186 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 187 | |
95b1d73a | 188 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 189 | } |
c19e6535 | 190 | return vport; |
064af421 BP |
191 | } |
192 | ||
ed099e92 | 193 | /* Called with RTNL lock. */ |
850b6b3b | 194 | void ovs_dp_detach_port(struct vport *p) |
064af421 BP |
195 | { |
196 | ASSERT_RTNL(); | |
197 | ||
064af421 | 198 | /* First drop references to device. */ |
95b1d73a | 199 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 200 | |
7237e4f4 | 201 | /* Then destroy it. */ |
850b6b3b | 202 | ovs_vport_del(p); |
064af421 BP |
203 | } |
204 | ||
8819fac7 | 205 | /* Must be called with rcu_read_lock. */ |
850b6b3b | 206 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
207 | { |
208 | struct datapath *dp = p->dp; | |
3544358a | 209 | struct sw_flow *flow; |
064af421 | 210 | struct dp_stats_percpu *stats; |
52a23d92 | 211 | struct sw_flow_key key; |
e9141eec | 212 | u64 *stats_counter; |
4c1ad233 | 213 | int error; |
52a23d92 | 214 | int key_len; |
064af421 | 215 | |
70dbc259 | 216 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 217 | |
52a23d92 JG |
218 | /* Extract flow from 'skb' into 'key'. */ |
219 | error = ovs_flow_extract(skb, p->port_no, &key, &key_len); | |
220 | if (unlikely(error)) { | |
221 | kfree_skb(skb); | |
222 | return; | |
55574bb0 BP |
223 | } |
224 | ||
52a23d92 JG |
225 | /* Look up flow. */ |
226 | flow = ovs_flow_tbl_lookup(rcu_dereference(dp->table), &key, key_len); | |
227 | if (unlikely(!flow)) { | |
228 | struct dp_upcall_info upcall; | |
229 | ||
230 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
231 | upcall.key = &key; | |
232 | upcall.userdata = NULL; | |
233 | upcall.portid = p->upcall_portid; | |
234 | ovs_dp_upcall(dp, skb, &upcall); | |
235 | consume_skb(skb); | |
236 | stats_counter = &stats->n_missed; | |
237 | goto out; | |
238 | } | |
239 | ||
240 | OVS_CB(skb)->flow = flow; | |
241 | ||
e9141eec | 242 | stats_counter = &stats->n_hit; |
850b6b3b JG |
243 | ovs_flow_used(OVS_CB(skb)->flow, skb); |
244 | ovs_execute_actions(dp, skb); | |
55574bb0 | 245 | |
8819fac7 | 246 | out: |
55574bb0 | 247 | /* Update datapath statistics. */ |
821cb9fa | 248 | u64_stats_update_begin(&stats->sync); |
e9141eec | 249 | (*stats_counter)++; |
821cb9fa | 250 | u64_stats_update_end(&stats->sync); |
064af421 BP |
251 | } |
252 | ||
aa5a8fdc JG |
253 | static struct genl_family dp_packet_genl_family = { |
254 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
255 | .hdrsize = sizeof(struct ovs_header), |
256 | .name = OVS_PACKET_FAMILY, | |
69685a88 | 257 | .version = OVS_PACKET_VERSION, |
2a4999f3 PS |
258 | .maxattr = OVS_PACKET_ATTR_MAX, |
259 | SET_NETNSOK | |
aa5a8fdc JG |
260 | }; |
261 | ||
850b6b3b JG |
262 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
263 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc JG |
264 | { |
265 | struct dp_stats_percpu *stats; | |
7257b535 | 266 | int dp_ifindex; |
aa5a8fdc JG |
267 | int err; |
268 | ||
28aea917 | 269 | if (upcall_info->portid == 0) { |
b063d9f0 | 270 | err = -ENOTCONN; |
b063d9f0 JG |
271 | goto err; |
272 | } | |
273 | ||
7257b535 BP |
274 | dp_ifindex = get_dpifindex(dp); |
275 | if (!dp_ifindex) { | |
276 | err = -ENODEV; | |
277 | goto err; | |
aa5a8fdc JG |
278 | } |
279 | ||
7257b535 | 280 | forward_ip_summed(skb, true); |
36ce148c | 281 | |
7257b535 | 282 | if (!skb_is_gso(skb)) |
2a4999f3 | 283 | err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
7257b535 | 284 | else |
2a4999f3 | 285 | err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
d76195db JG |
286 | if (err) |
287 | goto err; | |
288 | ||
289 | return 0; | |
aa5a8fdc | 290 | |
aa5a8fdc | 291 | err: |
70dbc259 | 292 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 293 | |
821cb9fa | 294 | u64_stats_update_begin(&stats->sync); |
aa5a8fdc | 295 | stats->n_lost++; |
821cb9fa | 296 | u64_stats_update_end(&stats->sync); |
aa5a8fdc | 297 | |
aa5a8fdc | 298 | return err; |
982b8810 BP |
299 | } |
300 | ||
2a4999f3 PS |
301 | static int queue_gso_packets(struct net *net, int dp_ifindex, |
302 | struct sk_buff *skb, | |
7257b535 | 303 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 304 | { |
d4cba1f8 | 305 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
306 | struct dp_upcall_info later_info; |
307 | struct sw_flow_key later_key; | |
308 | struct sk_buff *segs, *nskb; | |
309 | int err; | |
cb5087ca | 310 | |
0aa52d88 | 311 | segs = __skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM, false); |
79089764 PS |
312 | if (IS_ERR(segs)) |
313 | return PTR_ERR(segs); | |
99769a40 | 314 | |
7257b535 BP |
315 | /* Queue all of the segments. */ |
316 | skb = segs; | |
cb5087ca | 317 | do { |
2a4999f3 | 318 | err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info); |
982b8810 | 319 | if (err) |
7257b535 | 320 | break; |
856081f6 | 321 | |
d4cba1f8 | 322 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
e1cf87ff JG |
323 | /* The initial flow key extracted by ovs_flow_extract() |
324 | * in this case is for a first fragment, so we need to | |
7257b535 BP |
325 | * properly mark later fragments. |
326 | */ | |
327 | later_key = *upcall_info->key; | |
9e44d715 | 328 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
7257b535 BP |
329 | |
330 | later_info = *upcall_info; | |
331 | later_info.key = &later_key; | |
332 | upcall_info = &later_info; | |
333 | } | |
36ce148c | 334 | } while ((skb = skb->next)); |
cb5087ca | 335 | |
7257b535 BP |
336 | /* Free all of the segments. */ |
337 | skb = segs; | |
338 | do { | |
339 | nskb = skb->next; | |
340 | if (err) | |
341 | kfree_skb(skb); | |
342 | else | |
343 | consume_skb(skb); | |
344 | } while ((skb = nskb)); | |
345 | return err; | |
346 | } | |
347 | ||
0afa2373 TG |
348 | static size_t key_attr_size(void) |
349 | { | |
350 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
351 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ | |
352 | + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
353 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
354 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
355 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
356 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
357 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
358 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
359 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ | |
360 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
361 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
362 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
363 | + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */ | |
364 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
365 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
366 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
367 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
368 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
369 | } | |
370 | ||
371 | static size_t upcall_msg_size(const struct sk_buff *skb, | |
372 | const struct nlattr *userdata) | |
373 | { | |
374 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
375 | + nla_total_size(skb->len) /* OVS_PACKET_ATTR_PACKET */ | |
376 | + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */ | |
377 | ||
378 | /* OVS_PACKET_ATTR_USERDATA */ | |
379 | if (userdata) | |
380 | size += NLA_ALIGN(userdata->nla_len); | |
381 | ||
382 | return size; | |
383 | } | |
384 | ||
2a4999f3 PS |
385 | static int queue_userspace_packet(struct net *net, int dp_ifindex, |
386 | struct sk_buff *skb, | |
7257b535 BP |
387 | const struct dp_upcall_info *upcall_info) |
388 | { | |
389 | struct ovs_header *upcall; | |
6161d3fd | 390 | struct sk_buff *nskb = NULL; |
7257b535 BP |
391 | struct sk_buff *user_skb; /* to be queued to userspace */ |
392 | struct nlattr *nla; | |
7257b535 BP |
393 | int err; |
394 | ||
6161d3fd JG |
395 | if (vlan_tx_tag_present(skb)) { |
396 | nskb = skb_clone(skb, GFP_ATOMIC); | |
397 | if (!nskb) | |
398 | return -ENOMEM; | |
399 | ||
400 | err = vlan_deaccel_tag(nskb); | |
401 | if (err) | |
402 | return err; | |
7257b535 | 403 | |
6161d3fd JG |
404 | skb = nskb; |
405 | } | |
406 | ||
407 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
408 | err = -EFBIG; | |
409 | goto out; | |
410 | } | |
7257b535 | 411 | |
0afa2373 | 412 | user_skb = genlmsg_new(upcall_msg_size(skb, upcall_info->userdata), GFP_ATOMIC); |
6161d3fd JG |
413 | if (!user_skb) { |
414 | err = -ENOMEM; | |
415 | goto out; | |
416 | } | |
7257b535 BP |
417 | |
418 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
419 | 0, upcall_info->cmd); | |
420 | upcall->dp_ifindex = dp_ifindex; | |
421 | ||
422 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
850b6b3b | 423 | ovs_flow_to_nlattrs(upcall_info->key, user_skb); |
7257b535 BP |
424 | nla_nest_end(user_skb, nla); |
425 | ||
426 | if (upcall_info->userdata) | |
e995e3df | 427 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 428 | nla_len(upcall_info->userdata), |
e995e3df | 429 | nla_data(upcall_info->userdata)); |
7257b535 BP |
430 | |
431 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); | |
bed53bd1 PS |
432 | |
433 | skb_copy_and_csum_dev(skb, nla_data(nla)); | |
7257b535 | 434 | |
c39b1a5c | 435 | genlmsg_end(user_skb, upcall); |
28aea917 | 436 | err = genlmsg_unicast(net, user_skb, upcall_info->portid); |
6161d3fd JG |
437 | |
438 | out: | |
439 | kfree_skb(nskb); | |
440 | return err; | |
cb5087ca BP |
441 | } |
442 | ||
ed099e92 | 443 | /* Called with genl_mutex. */ |
2a4999f3 | 444 | static int flush_flows(struct datapath *dp) |
064af421 | 445 | { |
3544358a PS |
446 | struct flow_table *old_table; |
447 | struct flow_table *new_table; | |
8d5ebd83 | 448 | |
20d035b2 | 449 | old_table = genl_dereference(dp->table); |
850b6b3b | 450 | new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS); |
8d5ebd83 | 451 | if (!new_table) |
ed099e92 | 452 | return -ENOMEM; |
8d5ebd83 JG |
453 | |
454 | rcu_assign_pointer(dp->table, new_table); | |
455 | ||
850b6b3b | 456 | ovs_flow_tbl_deferred_destroy(old_table); |
ed099e92 | 457 | return 0; |
064af421 BP |
458 | } |
459 | ||
9b405f1a PS |
460 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, int attr_len) |
461 | { | |
462 | ||
463 | struct sw_flow_actions *acts; | |
464 | int new_acts_size; | |
465 | int req_size = NLA_ALIGN(attr_len); | |
466 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
467 | (*sfa)->actions_len; | |
468 | ||
ba400435 | 469 | if (req_size <= (ksize(*sfa) - next_offset)) |
9b405f1a PS |
470 | goto out; |
471 | ||
ba400435 | 472 | new_acts_size = ksize(*sfa) * 2; |
9b405f1a PS |
473 | |
474 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
475 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
476 | return ERR_PTR(-EMSGSIZE); | |
477 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
478 | } | |
479 | ||
480 | acts = ovs_flow_actions_alloc(new_acts_size); | |
481 | if (IS_ERR(acts)) | |
482 | return (void *)acts; | |
483 | ||
484 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
485 | acts->actions_len = (*sfa)->actions_len; | |
ba400435 | 486 | kfree(*sfa); |
9b405f1a PS |
487 | *sfa = acts; |
488 | ||
489 | out: | |
490 | (*sfa)->actions_len += req_size; | |
491 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
492 | } | |
493 | ||
494 | static int add_action(struct sw_flow_actions **sfa, int attrtype, void *data, int len) | |
495 | { | |
496 | struct nlattr *a; | |
497 | ||
498 | a = reserve_sfa_size(sfa, nla_attr_size(len)); | |
499 | if (IS_ERR(a)) | |
500 | return PTR_ERR(a); | |
501 | ||
502 | a->nla_type = attrtype; | |
503 | a->nla_len = nla_attr_size(len); | |
504 | ||
505 | if (data) | |
506 | memcpy(nla_data(a), data, len); | |
507 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
6ff686f2 | 508 | |
9b405f1a PS |
509 | return 0; |
510 | } | |
511 | ||
512 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, int attrtype) | |
513 | { | |
514 | int used = (*sfa)->actions_len; | |
515 | int err; | |
516 | ||
517 | err = add_action(sfa, attrtype, NULL, 0); | |
518 | if (err) | |
519 | return err; | |
520 | ||
521 | return used; | |
522 | } | |
523 | ||
524 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, int st_offset) | |
525 | { | |
526 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + st_offset); | |
527 | ||
528 | a->nla_len = sfa->actions_len - st_offset; | |
529 | } | |
530 | ||
531 | static int validate_and_copy_actions(const struct nlattr *attr, | |
532 | const struct sw_flow_key *key, int depth, | |
533 | struct sw_flow_actions **sfa); | |
534 | ||
535 | static int validate_and_copy_sample(const struct nlattr *attr, | |
536 | const struct sw_flow_key *key, int depth, | |
537 | struct sw_flow_actions **sfa) | |
6ff686f2 | 538 | { |
4be00e48 BP |
539 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; |
540 | const struct nlattr *probability, *actions; | |
541 | const struct nlattr *a; | |
9b405f1a | 542 | int rem, start, err, st_acts; |
4be00e48 BP |
543 | |
544 | memset(attrs, 0, sizeof(attrs)); | |
6455100f | 545 | nla_for_each_nested(a, attr, rem) { |
4be00e48 BP |
546 | int type = nla_type(a); |
547 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
548 | return -EINVAL; | |
549 | attrs[type] = a; | |
550 | } | |
551 | if (rem) | |
6ff686f2 | 552 | return -EINVAL; |
4be00e48 BP |
553 | |
554 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
555 | if (!probability || nla_len(probability) != sizeof(u32)) | |
6ff686f2 PS |
556 | return -EINVAL; |
557 | ||
4be00e48 BP |
558 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; |
559 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
560 | return -EINVAL; | |
9b405f1a PS |
561 | |
562 | /* validation done, copy sample action. */ | |
563 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE); | |
564 | if (start < 0) | |
565 | return start; | |
566 | err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, nla_data(probability), sizeof(u32)); | |
567 | if (err) | |
568 | return err; | |
569 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS); | |
570 | if (st_acts < 0) | |
571 | return st_acts; | |
572 | ||
573 | err = validate_and_copy_actions(actions, key, depth + 1, sfa); | |
574 | if (err) | |
575 | return err; | |
576 | ||
577 | add_nested_action_end(*sfa, st_acts); | |
578 | add_nested_action_end(*sfa, start); | |
579 | ||
580 | return 0; | |
4edb9ae9 PS |
581 | } |
582 | ||
b1323f59 PS |
583 | static int validate_tp_port(const struct sw_flow_key *flow_key) |
584 | { | |
585 | if (flow_key->eth.type == htons(ETH_P_IP)) { | |
6e9bea4d | 586 | if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst) |
b1323f59 PS |
587 | return 0; |
588 | } else if (flow_key->eth.type == htons(ETH_P_IPV6)) { | |
6e9bea4d | 589 | if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst) |
b1323f59 PS |
590 | return 0; |
591 | } | |
592 | ||
593 | return -EINVAL; | |
594 | } | |
595 | ||
9b405f1a PS |
596 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
597 | struct sw_flow_actions **sfa) | |
598 | { | |
599 | struct ovs_key_ipv4_tunnel tun_key; | |
600 | int err, start; | |
601 | ||
602 | err = ipv4_tun_from_nlattr(nla_data(attr), &tun_key); | |
603 | if (err) | |
604 | return err; | |
605 | ||
606 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET); | |
607 | if (start < 0) | |
608 | return start; | |
609 | ||
610 | err = add_action(sfa, OVS_KEY_ATTR_IPV4_TUNNEL, &tun_key, sizeof(tun_key)); | |
611 | add_nested_action_end(*sfa, start); | |
612 | ||
613 | return err; | |
614 | } | |
615 | ||
fea393b1 | 616 | static int validate_set(const struct nlattr *a, |
9b405f1a PS |
617 | const struct sw_flow_key *flow_key, |
618 | struct sw_flow_actions **sfa, | |
619 | bool *set_tun) | |
4edb9ae9 | 620 | { |
4edb9ae9 PS |
621 | const struct nlattr *ovs_key = nla_data(a); |
622 | int key_type = nla_type(ovs_key); | |
623 | ||
624 | /* There can be only one key in a action */ | |
625 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
626 | return -EINVAL; | |
627 | ||
628 | if (key_type > OVS_KEY_ATTR_MAX || | |
9b405f1a PS |
629 | (ovs_key_lens[key_type] != nla_len(ovs_key) && |
630 | ovs_key_lens[key_type] != -1)) | |
4edb9ae9 PS |
631 | return -EINVAL; |
632 | ||
fea393b1 | 633 | switch (key_type) { |
4edb9ae9 | 634 | const struct ovs_key_ipv4 *ipv4_key; |
bc7a5acd | 635 | const struct ovs_key_ipv6 *ipv6_key; |
9b405f1a | 636 | int err; |
4edb9ae9 | 637 | |
fea393b1 | 638 | case OVS_KEY_ATTR_PRIORITY: |
fea393b1 | 639 | case OVS_KEY_ATTR_ETHERNET: |
4edb9ae9 PS |
640 | break; |
641 | ||
72e8bf28 AA |
642 | case OVS_KEY_ATTR_SKB_MARK: |
643 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER) | |
644 | if (nla_get_u32(ovs_key) != 0) | |
645 | return -EINVAL; | |
646 | #endif | |
647 | break; | |
648 | ||
9b405f1a PS |
649 | case OVS_KEY_ATTR_TUNNEL: |
650 | *set_tun = true; | |
651 | err = validate_and_copy_set_tun(a, sfa); | |
652 | if (err) | |
653 | return err; | |
356af50b KM |
654 | break; |
655 | ||
fea393b1 | 656 | case OVS_KEY_ATTR_IPV4: |
4edb9ae9 PS |
657 | if (flow_key->eth.type != htons(ETH_P_IP)) |
658 | return -EINVAL; | |
659 | ||
6e9bea4d | 660 | if (!flow_key->ip.proto) |
4edb9ae9 PS |
661 | return -EINVAL; |
662 | ||
663 | ipv4_key = nla_data(ovs_key); | |
664 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
665 | return -EINVAL; | |
666 | ||
9e44d715 | 667 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) |
7257b535 BP |
668 | return -EINVAL; |
669 | ||
4edb9ae9 PS |
670 | break; |
671 | ||
bc7a5acd AA |
672 | case OVS_KEY_ATTR_IPV6: |
673 | if (flow_key->eth.type != htons(ETH_P_IPV6)) | |
674 | return -EINVAL; | |
675 | ||
676 | if (!flow_key->ip.proto) | |
677 | return -EINVAL; | |
678 | ||
679 | ipv6_key = nla_data(ovs_key); | |
680 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
681 | return -EINVAL; | |
682 | ||
683 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) | |
684 | return -EINVAL; | |
685 | ||
686 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) | |
687 | return -EINVAL; | |
688 | ||
689 | break; | |
690 | ||
fea393b1 | 691 | case OVS_KEY_ATTR_TCP: |
4edb9ae9 PS |
692 | if (flow_key->ip.proto != IPPROTO_TCP) |
693 | return -EINVAL; | |
694 | ||
b1323f59 | 695 | return validate_tp_port(flow_key); |
4edb9ae9 | 696 | |
fea393b1 | 697 | case OVS_KEY_ATTR_UDP: |
4edb9ae9 PS |
698 | if (flow_key->ip.proto != IPPROTO_UDP) |
699 | return -EINVAL; | |
700 | ||
b1323f59 | 701 | return validate_tp_port(flow_key); |
4edb9ae9 PS |
702 | |
703 | default: | |
704 | return -EINVAL; | |
705 | } | |
fea393b1 | 706 | |
4edb9ae9 | 707 | return 0; |
6ff686f2 PS |
708 | } |
709 | ||
98403001 BP |
710 | static int validate_userspace(const struct nlattr *attr) |
711 | { | |
6455100f | 712 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { |
98403001 | 713 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, |
e995e3df | 714 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, |
98403001 BP |
715 | }; |
716 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
717 | int error; | |
718 | ||
6455100f PS |
719 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, |
720 | attr, userspace_policy); | |
98403001 BP |
721 | if (error) |
722 | return error; | |
723 | ||
6455100f PS |
724 | if (!a[OVS_USERSPACE_ATTR_PID] || |
725 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
98403001 BP |
726 | return -EINVAL; |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
9b405f1a PS |
731 | static int copy_action(const struct nlattr *from, |
732 | struct sw_flow_actions **sfa) | |
733 | { | |
734 | int totlen = NLA_ALIGN(from->nla_len); | |
735 | struct nlattr *to; | |
736 | ||
737 | to = reserve_sfa_size(sfa, from->nla_len); | |
738 | if (IS_ERR(to)) | |
739 | return PTR_ERR(to); | |
740 | ||
741 | memcpy(to, from, totlen); | |
742 | return 0; | |
743 | } | |
744 | ||
745 | static int validate_and_copy_actions(const struct nlattr *attr, | |
746 | const struct sw_flow_key *key, | |
747 | int depth, | |
748 | struct sw_flow_actions **sfa) | |
064af421 | 749 | { |
23cad98c | 750 | const struct nlattr *a; |
6ff686f2 PS |
751 | int rem, err; |
752 | ||
753 | if (depth >= SAMPLE_ACTION_DEPTH) | |
754 | return -EOVERFLOW; | |
23cad98c | 755 | |
37a1300c | 756 | nla_for_each_nested(a, attr, rem) { |
98403001 | 757 | /* Expected argument lengths, (u32)-1 for variable length. */ |
df2c07f4 | 758 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
fea393b1 | 759 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), |
98403001 | 760 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
fea393b1 BP |
761 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
762 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
4edb9ae9 | 763 | [OVS_ACTION_ATTR_SET] = (u32)-1, |
98403001 | 764 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1 |
23cad98c | 765 | }; |
fea393b1 | 766 | const struct ovs_action_push_vlan *vlan; |
23cad98c | 767 | int type = nla_type(a); |
9b405f1a | 768 | bool skip_copy; |
23cad98c | 769 | |
6ff686f2 | 770 | if (type > OVS_ACTION_ATTR_MAX || |
98403001 BP |
771 | (action_lens[type] != nla_len(a) && |
772 | action_lens[type] != (u32)-1)) | |
23cad98c BP |
773 | return -EINVAL; |
774 | ||
9b405f1a | 775 | skip_copy = false; |
23cad98c | 776 | switch (type) { |
df2c07f4 | 777 | case OVS_ACTION_ATTR_UNSPEC: |
cdee00fd | 778 | return -EINVAL; |
064af421 | 779 | |
98403001 BP |
780 | case OVS_ACTION_ATTR_USERSPACE: |
781 | err = validate_userspace(a); | |
782 | if (err) | |
783 | return err; | |
784 | break; | |
785 | ||
df2c07f4 | 786 | case OVS_ACTION_ATTR_OUTPUT: |
23cad98c BP |
787 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
788 | return -EINVAL; | |
3b1fc5f3 | 789 | break; |
cdee00fd | 790 | |
4edb9ae9 | 791 | |
fea393b1 BP |
792 | case OVS_ACTION_ATTR_POP_VLAN: |
793 | break; | |
794 | ||
795 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
796 | vlan = nla_data(a); | |
797 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
798 | return -EINVAL; | |
8ddc056d | 799 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) |
064af421 | 800 | return -EINVAL; |
23cad98c | 801 | break; |
064af421 | 802 | |
4edb9ae9 | 803 | case OVS_ACTION_ATTR_SET: |
9b405f1a | 804 | err = validate_set(a, key, sfa, &skip_copy); |
4edb9ae9 PS |
805 | if (err) |
806 | return err; | |
23cad98c | 807 | break; |
064af421 | 808 | |
6ff686f2 | 809 | case OVS_ACTION_ATTR_SAMPLE: |
9b405f1a | 810 | err = validate_and_copy_sample(a, key, depth, sfa); |
6ff686f2 PS |
811 | if (err) |
812 | return err; | |
9b405f1a | 813 | skip_copy = true; |
6ff686f2 PS |
814 | break; |
815 | ||
23cad98c | 816 | default: |
4edb9ae9 | 817 | return -EINVAL; |
23cad98c | 818 | } |
9b405f1a PS |
819 | if (!skip_copy) { |
820 | err = copy_action(a, sfa); | |
821 | if (err) | |
822 | return err; | |
823 | } | |
23cad98c | 824 | } |
3c5f6de3 | 825 | |
23cad98c BP |
826 | if (rem > 0) |
827 | return -EINVAL; | |
064af421 | 828 | |
23cad98c | 829 | return 0; |
064af421 | 830 | } |
4edb9ae9 | 831 | |
064af421 BP |
832 | static void clear_stats(struct sw_flow *flow) |
833 | { | |
6bfafa55 | 834 | flow->used = 0; |
064af421 | 835 | flow->tcp_flags = 0; |
064af421 BP |
836 | flow->packet_count = 0; |
837 | flow->byte_count = 0; | |
838 | } | |
839 | ||
df2c07f4 | 840 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 841 | { |
df2c07f4 | 842 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 843 | struct nlattr **a = info->attrs; |
e0e57990 | 844 | struct sw_flow_actions *acts; |
982b8810 | 845 | struct sk_buff *packet; |
e0e57990 | 846 | struct sw_flow *flow; |
f7cd0081 | 847 | struct datapath *dp; |
d6569377 | 848 | struct ethhdr *eth; |
3f19d399 | 849 | int len; |
d6569377 | 850 | int err; |
76abe283 | 851 | int key_len; |
064af421 | 852 | |
f7cd0081 | 853 | err = -EINVAL; |
df2c07f4 | 854 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 855 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 856 | goto err; |
064af421 | 857 | |
df2c07f4 | 858 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 859 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
860 | err = -ENOMEM; |
861 | if (!packet) | |
e5cad958 | 862 | goto err; |
3f19d399 BP |
863 | skb_reserve(packet, NET_IP_ALIGN); |
864 | ||
bf3d6fce | 865 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 866 | |
f7cd0081 BP |
867 | skb_reset_mac_header(packet); |
868 | eth = eth_hdr(packet); | |
064af421 | 869 | |
d6569377 BP |
870 | /* Normally, setting the skb 'protocol' field would be handled by a |
871 | * call to eth_type_trans(), but it assumes there's a sending | |
872 | * device, which we may not have. */ | |
7cd46155 | 873 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
f7cd0081 | 874 | packet->protocol = eth->h_proto; |
d6569377 | 875 | else |
f7cd0081 | 876 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 877 | |
e0e57990 | 878 | /* Build an sw_flow for sending this packet. */ |
850b6b3b | 879 | flow = ovs_flow_alloc(); |
e0e57990 BP |
880 | err = PTR_ERR(flow); |
881 | if (IS_ERR(flow)) | |
e5cad958 | 882 | goto err_kfree_skb; |
064af421 | 883 | |
850b6b3b | 884 | err = ovs_flow_extract(packet, -1, &flow->key, &key_len); |
e0e57990 | 885 | if (err) |
9321954a | 886 | goto err_flow_free; |
e0e57990 | 887 | |
13e24889 | 888 | err = ovs_flow_metadata_from_nlattrs(flow, key_len, a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 | 889 | if (err) |
9321954a | 890 | goto err_flow_free; |
9b405f1a | 891 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
e0e57990 BP |
892 | err = PTR_ERR(acts); |
893 | if (IS_ERR(acts)) | |
9321954a | 894 | goto err_flow_free; |
9b405f1a PS |
895 | |
896 | err = validate_and_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0, &acts); | |
e0e57990 | 897 | rcu_assign_pointer(flow->sf_acts, acts); |
9b405f1a PS |
898 | if (err) |
899 | goto err_flow_free; | |
e0e57990 BP |
900 | |
901 | OVS_CB(packet)->flow = flow; | |
abff858b | 902 | packet->priority = flow->key.phy.priority; |
72e8bf28 | 903 | skb_set_mark(packet, flow->key.phy.skb_mark); |
e0e57990 | 904 | |
d6569377 | 905 | rcu_read_lock(); |
2a4999f3 | 906 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 907 | err = -ENODEV; |
e5cad958 BP |
908 | if (!dp) |
909 | goto err_unlock; | |
cc4015df | 910 | |
e9141eec | 911 | local_bh_disable(); |
850b6b3b | 912 | err = ovs_execute_actions(dp, packet); |
e9141eec | 913 | local_bh_enable(); |
d6569377 | 914 | rcu_read_unlock(); |
e0e57990 | 915 | |
9321954a | 916 | ovs_flow_free(flow); |
e5cad958 | 917 | return err; |
064af421 | 918 | |
e5cad958 BP |
919 | err_unlock: |
920 | rcu_read_unlock(); | |
9321954a JG |
921 | err_flow_free: |
922 | ovs_flow_free(flow); | |
e5cad958 BP |
923 | err_kfree_skb: |
924 | kfree_skb(packet); | |
925 | err: | |
d6569377 | 926 | return err; |
064af421 BP |
927 | } |
928 | ||
df2c07f4 | 929 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc TG |
930 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18) |
931 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, | |
932 | #else | |
933 | [OVS_PACKET_ATTR_PACKET] = { .minlen = ETH_HLEN }, | |
934 | #endif | |
df2c07f4 JP |
935 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
936 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
937 | }; |
938 | ||
939 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 940 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
941 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
942 | .policy = packet_policy, | |
df2c07f4 | 943 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
944 | } |
945 | }; | |
946 | ||
df2c07f4 | 947 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) |
064af421 | 948 | { |
d6569377 | 949 | int i; |
20d035b2 | 950 | struct flow_table *table = genl_dereference(dp->table); |
f180c2e2 | 951 | |
850b6b3b | 952 | stats->n_flows = ovs_flow_tbl_count(table); |
064af421 | 953 | |
7257b535 | 954 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
d6569377 BP |
955 | for_each_possible_cpu(i) { |
956 | const struct dp_stats_percpu *percpu_stats; | |
957 | struct dp_stats_percpu local_stats; | |
821cb9fa | 958 | unsigned int start; |
44e05eca | 959 | |
d6569377 | 960 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 961 | |
d6569377 | 962 | do { |
821cb9fa | 963 | start = u64_stats_fetch_begin_bh(&percpu_stats->sync); |
d6569377 | 964 | local_stats = *percpu_stats; |
821cb9fa | 965 | } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); |
064af421 | 966 | |
d6569377 BP |
967 | stats->n_hit += local_stats.n_hit; |
968 | stats->n_missed += local_stats.n_missed; | |
969 | stats->n_lost += local_stats.n_lost; | |
970 | } | |
971 | } | |
064af421 | 972 | |
df2c07f4 JP |
973 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
974 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
975 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
976 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 977 | }; |
36956a7d | 978 | |
37a1300c BP |
979 | static struct genl_family dp_flow_genl_family = { |
980 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
981 | .hdrsize = sizeof(struct ovs_header), |
982 | .name = OVS_FLOW_FAMILY, | |
69685a88 | 983 | .version = OVS_FLOW_VERSION, |
2a4999f3 PS |
984 | .maxattr = OVS_FLOW_ATTR_MAX, |
985 | SET_NETNSOK | |
37a1300c | 986 | }; |
ed099e92 | 987 | |
850b6b3b | 988 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { |
df2c07f4 | 989 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
990 | }; |
991 | ||
9b405f1a PS |
992 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb); |
993 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) | |
994 | { | |
995 | const struct nlattr *a; | |
996 | struct nlattr *start; | |
997 | int err = 0, rem; | |
998 | ||
999 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
1000 | if (!start) | |
1001 | return -EMSGSIZE; | |
1002 | ||
1003 | nla_for_each_nested(a, attr, rem) { | |
1004 | int type = nla_type(a); | |
1005 | struct nlattr *st_sample; | |
1006 | ||
1007 | switch (type) { | |
1008 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
1009 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, sizeof(u32), nla_data(a))) | |
1010 | return -EMSGSIZE; | |
1011 | break; | |
1012 | case OVS_SAMPLE_ATTR_ACTIONS: | |
1013 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
1014 | if (!st_sample) | |
1015 | return -EMSGSIZE; | |
1016 | err = actions_to_attr(nla_data(a), nla_len(a), skb); | |
1017 | if (err) | |
1018 | return err; | |
1019 | nla_nest_end(skb, st_sample); | |
1020 | break; | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | nla_nest_end(skb, start); | |
1025 | return err; | |
1026 | } | |
1027 | ||
1028 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
1029 | { | |
1030 | const struct nlattr *ovs_key = nla_data(a); | |
1031 | int key_type = nla_type(ovs_key); | |
1032 | struct nlattr *start; | |
1033 | int err; | |
1034 | ||
1035 | switch (key_type) { | |
1036 | case OVS_KEY_ATTR_IPV4_TUNNEL: | |
1037 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); | |
1038 | if (!start) | |
1039 | return -EMSGSIZE; | |
1040 | ||
1041 | err = ipv4_tun_to_nlattr(skb, nla_data(ovs_key)); | |
1042 | if (err) | |
1043 | return err; | |
1044 | nla_nest_end(skb, start); | |
1045 | break; | |
1046 | default: | |
1047 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
1048 | return -EMSGSIZE; | |
1049 | break; | |
1050 | } | |
1051 | ||
1052 | return 0; | |
1053 | } | |
1054 | ||
1055 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb) | |
1056 | { | |
1057 | const struct nlattr *a; | |
1058 | int rem, err; | |
1059 | ||
1060 | nla_for_each_attr(a, attr, len, rem) { | |
1061 | int type = nla_type(a); | |
1062 | ||
1063 | switch (type) { | |
1064 | case OVS_ACTION_ATTR_SET: | |
1065 | err = set_action_to_attr(a, skb); | |
1066 | if (err) | |
1067 | return err; | |
1068 | break; | |
1069 | ||
1070 | case OVS_ACTION_ATTR_SAMPLE: | |
1071 | err = sample_action_to_attr(a, skb); | |
1072 | if (err) | |
1073 | return err; | |
1074 | break; | |
1075 | default: | |
1076 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
1077 | return -EMSGSIZE; | |
1078 | break; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | return 0; | |
1083 | } | |
1084 | ||
0afa2373 TG |
1085 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
1086 | { | |
1087 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
1088 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
1089 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ | |
1090 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
1091 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
1092 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
1093 | } | |
1094 | ||
37a1300c | 1095 | /* Called with genl_lock. */ |
df2c07f4 | 1096 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
28aea917 | 1097 | struct sk_buff *skb, u32 portid, |
6455100f | 1098 | u32 seq, u32 flags, u8 cmd) |
d6569377 | 1099 | { |
37a1300c | 1100 | const int skb_orig_len = skb->len; |
d6569377 | 1101 | const struct sw_flow_actions *sf_acts; |
9b405f1a | 1102 | struct nlattr *start; |
df2c07f4 JP |
1103 | struct ovs_flow_stats stats; |
1104 | struct ovs_header *ovs_header; | |
d6569377 BP |
1105 | struct nlattr *nla; |
1106 | unsigned long used; | |
1107 | u8 tcp_flags; | |
1108 | int err; | |
064af421 | 1109 | |
d6569377 | 1110 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 1111 | lockdep_genl_is_held()); |
064af421 | 1112 | |
28aea917 | 1113 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
df2c07f4 | 1114 | if (!ovs_header) |
37a1300c | 1115 | return -EMSGSIZE; |
d6569377 | 1116 | |
99769a40 | 1117 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 1118 | |
df2c07f4 | 1119 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
1120 | if (!nla) |
1121 | goto nla_put_failure; | |
850b6b3b | 1122 | err = ovs_flow_to_nlattrs(&flow->key, skb); |
d6569377 | 1123 | if (err) |
37a1300c | 1124 | goto error; |
d6569377 BP |
1125 | nla_nest_end(skb, nla); |
1126 | ||
1127 | spin_lock_bh(&flow->lock); | |
1128 | used = flow->used; | |
1129 | stats.n_packets = flow->packet_count; | |
1130 | stats.n_bytes = flow->byte_count; | |
1131 | tcp_flags = flow->tcp_flags; | |
1132 | spin_unlock_bh(&flow->lock); | |
1133 | ||
c3cc8c03 DM |
1134 | if (used && |
1135 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
1136 | goto nla_put_failure; | |
d6569377 | 1137 | |
c3cc8c03 DM |
1138 | if (stats.n_packets && |
1139 | nla_put(skb, OVS_FLOW_ATTR_STATS, | |
1140 | sizeof(struct ovs_flow_stats), &stats)) | |
1141 | goto nla_put_failure; | |
d6569377 | 1142 | |
c3cc8c03 DM |
1143 | if (tcp_flags && |
1144 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags)) | |
1145 | goto nla_put_failure; | |
d6569377 | 1146 | |
df2c07f4 | 1147 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
1148 | * this is the first flow to be dumped into 'skb'. This is unusual for |
1149 | * Netlink but individual action lists can be longer than | |
1150 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
1151 | * The userspace caller can always fetch the actions separately if it | |
1152 | * really wants them. (Most userspace callers in fact don't care.) | |
1153 | * | |
1154 | * This can only fail for dump operations because the skb is always | |
1155 | * properly sized for single flows. | |
1156 | */ | |
9b405f1a | 1157 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee PS |
1158 | if (start) { |
1159 | err = actions_to_attr(sf_acts->actions, sf_acts->actions_len, skb); | |
0a25b039 BP |
1160 | if (!err) |
1161 | nla_nest_end(skb, start); | |
1162 | else { | |
1163 | if (skb_orig_len) | |
1164 | goto error; | |
1165 | ||
1166 | nla_nest_cancel(skb, start); | |
1167 | } | |
7aac03bd JG |
1168 | } else if (skb_orig_len) |
1169 | goto nla_put_failure; | |
37a1300c | 1170 | |
df2c07f4 | 1171 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1172 | |
1173 | nla_put_failure: | |
1174 | err = -EMSGSIZE; | |
37a1300c | 1175 | error: |
df2c07f4 | 1176 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 1177 | return err; |
44e05eca BP |
1178 | } |
1179 | ||
df2c07f4 | 1180 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) |
44e05eca | 1181 | { |
37a1300c | 1182 | const struct sw_flow_actions *sf_acts; |
d6569377 | 1183 | |
37a1300c BP |
1184 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
1185 | lockdep_genl_is_held()); | |
d6569377 | 1186 | |
0afa2373 | 1187 | return genlmsg_new(ovs_flow_cmd_msg_size(sf_acts), GFP_KERNEL); |
37a1300c | 1188 | } |
8d5ebd83 | 1189 | |
6455100f PS |
1190 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, |
1191 | struct datapath *dp, | |
28aea917 | 1192 | u32 portid, u32 seq, u8 cmd) |
37a1300c BP |
1193 | { |
1194 | struct sk_buff *skb; | |
1195 | int retval; | |
d6569377 | 1196 | |
df2c07f4 | 1197 | skb = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1198 | if (!skb) |
1199 | return ERR_PTR(-ENOMEM); | |
d6569377 | 1200 | |
28aea917 | 1201 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, portid, seq, 0, cmd); |
37a1300c | 1202 | BUG_ON(retval < 0); |
d6569377 | 1203 | return skb; |
064af421 BP |
1204 | } |
1205 | ||
df2c07f4 | 1206 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1207 | { |
37a1300c | 1208 | struct nlattr **a = info->attrs; |
df2c07f4 | 1209 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1210 | struct sw_flow_key key; |
d6569377 | 1211 | struct sw_flow *flow; |
37a1300c | 1212 | struct sk_buff *reply; |
9c52546b | 1213 | struct datapath *dp; |
3544358a | 1214 | struct flow_table *table; |
9b405f1a | 1215 | struct sw_flow_actions *acts = NULL; |
bc4a05c6 | 1216 | int error; |
76abe283 | 1217 | int key_len; |
064af421 | 1218 | |
37a1300c BP |
1219 | /* Extract key. */ |
1220 | error = -EINVAL; | |
df2c07f4 | 1221 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1222 | goto error; |
850b6b3b | 1223 | error = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1224 | if (error) |
1225 | goto error; | |
064af421 | 1226 | |
37a1300c | 1227 | /* Validate actions. */ |
df2c07f4 | 1228 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
9b405f1a PS |
1229 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
1230 | error = PTR_ERR(acts); | |
1231 | if (IS_ERR(acts)) | |
37a1300c | 1232 | goto error; |
9b405f1a PS |
1233 | |
1234 | error = validate_and_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0, &acts); | |
1235 | if (error) | |
1236 | goto err_kfree; | |
df2c07f4 | 1237 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
1238 | error = -EINVAL; |
1239 | goto error; | |
1240 | } | |
1241 | ||
2a4999f3 | 1242 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
d6569377 | 1243 | error = -ENODEV; |
9c52546b | 1244 | if (!dp) |
9b405f1a | 1245 | goto err_kfree; |
704a1e09 | 1246 | |
20d035b2 | 1247 | table = genl_dereference(dp->table); |
850b6b3b | 1248 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1249 | if (!flow) { |
d6569377 BP |
1250 | /* Bail out if we're not allowed to create a new flow. */ |
1251 | error = -ENOENT; | |
df2c07f4 | 1252 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
9b405f1a | 1253 | goto err_kfree; |
d6569377 BP |
1254 | |
1255 | /* Expand table, if necessary, to make room. */ | |
850b6b3b | 1256 | if (ovs_flow_tbl_need_to_expand(table)) { |
3544358a PS |
1257 | struct flow_table *new_table; |
1258 | ||
850b6b3b | 1259 | new_table = ovs_flow_tbl_expand(table); |
3544358a PS |
1260 | if (!IS_ERR(new_table)) { |
1261 | rcu_assign_pointer(dp->table, new_table); | |
850b6b3b | 1262 | ovs_flow_tbl_deferred_destroy(table); |
20d035b2 | 1263 | table = genl_dereference(dp->table); |
3544358a | 1264 | } |
d6569377 BP |
1265 | } |
1266 | ||
1267 | /* Allocate flow. */ | |
850b6b3b | 1268 | flow = ovs_flow_alloc(); |
d6569377 BP |
1269 | if (IS_ERR(flow)) { |
1270 | error = PTR_ERR(flow); | |
9b405f1a | 1271 | goto err_kfree; |
d6569377 | 1272 | } |
d6569377 BP |
1273 | clear_stats(flow); |
1274 | ||
d6569377 BP |
1275 | rcu_assign_pointer(flow->sf_acts, acts); |
1276 | ||
d6569377 | 1277 | /* Put flow in bucket. */ |
13e24889 | 1278 | ovs_flow_tbl_insert(table, flow, &key, key_len); |
37a1300c | 1279 | |
28aea917 | 1280 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f PS |
1281 | info->snd_seq, |
1282 | OVS_FLOW_CMD_NEW); | |
d6569377 BP |
1283 | } else { |
1284 | /* We found a matching flow. */ | |
1285 | struct sw_flow_actions *old_acts; | |
1286 | ||
1287 | /* Bail out if we're not allowed to modify an existing flow. | |
1288 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1289 | * because Generic Netlink treats the latter as a dump | |
1290 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1291 | * gets fixed. | |
1292 | */ | |
1293 | error = -EEXIST; | |
df2c07f4 | 1294 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c | 1295 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
9b405f1a | 1296 | goto err_kfree; |
d6569377 BP |
1297 | |
1298 | /* Update actions. */ | |
d6569377 | 1299 | old_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 1300 | lockdep_genl_is_held()); |
9b405f1a PS |
1301 | rcu_assign_pointer(flow->sf_acts, acts); |
1302 | ovs_flow_deferred_free_acts(old_acts); | |
d6569377 | 1303 | |
28aea917 | 1304 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f | 1305 | info->snd_seq, OVS_FLOW_CMD_NEW); |
d6569377 BP |
1306 | |
1307 | /* Clear stats. */ | |
df2c07f4 | 1308 | if (a[OVS_FLOW_ATTR_CLEAR]) { |
d6569377 BP |
1309 | spin_lock_bh(&flow->lock); |
1310 | clear_stats(flow); | |
1311 | spin_unlock_bh(&flow->lock); | |
1312 | } | |
9c52546b | 1313 | } |
37a1300c BP |
1314 | |
1315 | if (!IS_ERR(reply)) | |
e297c6b7 | 1316 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
37a1300c | 1317 | else |
2a4999f3 PS |
1318 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
1319 | ovs_dp_flow_multicast_group.id, PTR_ERR(reply)); | |
d6569377 | 1320 | return 0; |
704a1e09 | 1321 | |
9b405f1a | 1322 | err_kfree: |
ba400435 | 1323 | kfree(acts); |
37a1300c | 1324 | error: |
9c52546b | 1325 | return error; |
704a1e09 BP |
1326 | } |
1327 | ||
df2c07f4 | 1328 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1329 | { |
37a1300c | 1330 | struct nlattr **a = info->attrs; |
df2c07f4 | 1331 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1332 | struct sw_flow_key key; |
37a1300c | 1333 | struct sk_buff *reply; |
704a1e09 | 1334 | struct sw_flow *flow; |
9c52546b | 1335 | struct datapath *dp; |
3544358a | 1336 | struct flow_table *table; |
9c52546b | 1337 | int err; |
76abe283 | 1338 | int key_len; |
704a1e09 | 1339 | |
df2c07f4 | 1340 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1341 | return -EINVAL; |
850b6b3b | 1342 | err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1343 | if (err) |
1344 | return err; | |
704a1e09 | 1345 | |
2a4999f3 | 1346 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
9c52546b | 1347 | if (!dp) |
ed099e92 | 1348 | return -ENODEV; |
704a1e09 | 1349 | |
20d035b2 | 1350 | table = genl_dereference(dp->table); |
850b6b3b | 1351 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1352 | if (!flow) |
ed099e92 | 1353 | return -ENOENT; |
d6569377 | 1354 | |
28aea917 | 1355 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f | 1356 | info->snd_seq, OVS_FLOW_CMD_NEW); |
37a1300c BP |
1357 | if (IS_ERR(reply)) |
1358 | return PTR_ERR(reply); | |
36956a7d | 1359 | |
37a1300c | 1360 | return genlmsg_reply(reply, info); |
d6569377 | 1361 | } |
9c52546b | 1362 | |
df2c07f4 | 1363 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1364 | { |
37a1300c | 1365 | struct nlattr **a = info->attrs; |
df2c07f4 | 1366 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1367 | struct sw_flow_key key; |
37a1300c | 1368 | struct sk_buff *reply; |
d6569377 | 1369 | struct sw_flow *flow; |
d6569377 | 1370 | struct datapath *dp; |
3544358a | 1371 | struct flow_table *table; |
d6569377 | 1372 | int err; |
76abe283 | 1373 | int key_len; |
36956a7d | 1374 | |
2a4999f3 PS |
1375 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
1376 | if (!dp) | |
1377 | return -ENODEV; | |
1378 | ||
df2c07f4 | 1379 | if (!a[OVS_FLOW_ATTR_KEY]) |
2a4999f3 PS |
1380 | return flush_flows(dp); |
1381 | ||
850b6b3b | 1382 | err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1383 | if (err) |
1384 | return err; | |
d6569377 | 1385 | |
20d035b2 | 1386 | table = genl_dereference(dp->table); |
850b6b3b | 1387 | flow = ovs_flow_tbl_lookup(table, &key, key_len); |
3544358a | 1388 | if (!flow) |
37a1300c | 1389 | return -ENOENT; |
d6569377 | 1390 | |
df2c07f4 | 1391 | reply = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1392 | if (!reply) |
1393 | return -ENOMEM; | |
1394 | ||
850b6b3b | 1395 | ovs_flow_tbl_remove(table, flow); |
37a1300c | 1396 | |
28aea917 | 1397 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid, |
df2c07f4 | 1398 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); |
37a1300c BP |
1399 | BUG_ON(err < 0); |
1400 | ||
850b6b3b | 1401 | ovs_flow_deferred_free(flow); |
37a1300c | 1402 | |
e297c6b7 | 1403 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
37a1300c BP |
1404 | return 0; |
1405 | } | |
1406 | ||
df2c07f4 | 1407 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1408 | { |
df2c07f4 | 1409 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
37a1300c | 1410 | struct datapath *dp; |
20d035b2 | 1411 | struct flow_table *table; |
37a1300c | 1412 | |
2a4999f3 | 1413 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
37a1300c BP |
1414 | if (!dp) |
1415 | return -ENODEV; | |
1416 | ||
20d035b2 JG |
1417 | table = genl_dereference(dp->table); |
1418 | ||
37a1300c | 1419 | for (;;) { |
37a1300c BP |
1420 | struct sw_flow *flow; |
1421 | u32 bucket, obj; | |
1422 | ||
1423 | bucket = cb->args[0]; | |
1424 | obj = cb->args[1]; | |
850b6b3b | 1425 | flow = ovs_flow_tbl_next(table, &bucket, &obj); |
3544358a | 1426 | if (!flow) |
37a1300c BP |
1427 | break; |
1428 | ||
6455100f | 1429 | if (ovs_flow_cmd_fill_info(flow, dp, skb, |
28aea917 | 1430 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1431 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1432 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1433 | break; |
1434 | ||
1435 | cb->args[0] = bucket; | |
1436 | cb->args[1] = obj; | |
1437 | } | |
1438 | return skb->len; | |
704a1e09 BP |
1439 | } |
1440 | ||
37a1300c | 1441 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1442 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1443 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1444 | .policy = flow_policy, | |
df2c07f4 | 1445 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1446 | }, |
df2c07f4 | 1447 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1448 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1449 | .policy = flow_policy, | |
df2c07f4 | 1450 | .doit = ovs_flow_cmd_del |
37a1300c | 1451 | }, |
df2c07f4 | 1452 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1453 | .flags = 0, /* OK for unprivileged users. */ |
1454 | .policy = flow_policy, | |
df2c07f4 JP |
1455 | .doit = ovs_flow_cmd_get, |
1456 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1457 | }, |
df2c07f4 | 1458 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1459 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1460 | .policy = flow_policy, | |
df2c07f4 | 1461 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1462 | }, |
1463 | }; | |
1464 | ||
df2c07f4 | 1465 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
aaff4b55 | 1466 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1467 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
aaff4b55 | 1468 | #endif |
b063d9f0 | 1469 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
d6569377 BP |
1470 | }; |
1471 | ||
aaff4b55 BP |
1472 | static struct genl_family dp_datapath_genl_family = { |
1473 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1474 | .hdrsize = sizeof(struct ovs_header), |
1475 | .name = OVS_DATAPATH_FAMILY, | |
69685a88 | 1476 | .version = OVS_DATAPATH_VERSION, |
2a4999f3 PS |
1477 | .maxattr = OVS_DP_ATTR_MAX, |
1478 | SET_NETNSOK | |
aaff4b55 BP |
1479 | }; |
1480 | ||
850b6b3b | 1481 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
df2c07f4 | 1482 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1483 | }; |
1484 | ||
0afa2373 TG |
1485 | static size_t ovs_dp_cmd_msg_size(void) |
1486 | { | |
1487 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1488 | ||
1489 | msgsize += nla_total_size(IFNAMSIZ); | |
1490 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1491 | ||
1492 | return msgsize; | |
1493 | } | |
1494 | ||
df2c07f4 | 1495 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1496 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1497 | { |
df2c07f4 | 1498 | struct ovs_header *ovs_header; |
e926dfe3 | 1499 | struct ovs_dp_stats dp_stats; |
064af421 BP |
1500 | int err; |
1501 | ||
28aea917 | 1502 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1503 | flags, cmd); |
df2c07f4 | 1504 | if (!ovs_header) |
aaff4b55 | 1505 | goto error; |
064af421 | 1506 | |
b063d9f0 | 1507 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1508 | |
d6569377 | 1509 | rcu_read_lock(); |
850b6b3b | 1510 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
d6569377 | 1511 | rcu_read_unlock(); |
064af421 | 1512 | if (err) |
d6569377 | 1513 | goto nla_put_failure; |
064af421 | 1514 | |
e926dfe3 | 1515 | get_dp_stats(dp, &dp_stats); |
c3cc8c03 DM |
1516 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats)) |
1517 | goto nla_put_failure; | |
d6569377 | 1518 | |
df2c07f4 | 1519 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1520 | |
1521 | nla_put_failure: | |
df2c07f4 | 1522 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1523 | error: |
1524 | return -EMSGSIZE; | |
d6569377 BP |
1525 | } |
1526 | ||
28aea917 | 1527 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 portid, |
aaff4b55 | 1528 | u32 seq, u8 cmd) |
d6569377 | 1529 | { |
d6569377 | 1530 | struct sk_buff *skb; |
aaff4b55 | 1531 | int retval; |
d6569377 | 1532 | |
0afa2373 | 1533 | skb = genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
064af421 | 1534 | if (!skb) |
d6569377 | 1535 | return ERR_PTR(-ENOMEM); |
659586ef | 1536 | |
28aea917 | 1537 | retval = ovs_dp_cmd_fill_info(dp, skb, portid, seq, 0, cmd); |
aaff4b55 BP |
1538 | if (retval < 0) { |
1539 | kfree_skb(skb); | |
1540 | return ERR_PTR(retval); | |
1541 | } | |
1542 | return skb; | |
1543 | } | |
9dca7bd5 | 1544 | |
df2c07f4 | 1545 | static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
aaff4b55 | 1546 | { |
df2c07f4 | 1547 | return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1); |
d6569377 BP |
1548 | } |
1549 | ||
ed099e92 | 1550 | /* Called with genl_mutex and optionally with RTNL lock also. */ |
2a4999f3 PS |
1551 | static struct datapath *lookup_datapath(struct net *net, |
1552 | struct ovs_header *ovs_header, | |
6455100f | 1553 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1554 | { |
254f2dc8 BP |
1555 | struct datapath *dp; |
1556 | ||
df2c07f4 | 1557 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1558 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1559 | else { |
d6569377 | 1560 | struct vport *vport; |
d6569377 | 1561 | |
057dd6d2 | 1562 | rcu_read_lock(); |
2a4999f3 | 1563 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1564 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
057dd6d2 | 1565 | rcu_read_unlock(); |
d6569377 | 1566 | } |
254f2dc8 | 1567 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1568 | } |
1569 | ||
df2c07f4 | 1570 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1571 | { |
aaff4b55 | 1572 | struct nlattr **a = info->attrs; |
d6569377 | 1573 | struct vport_parms parms; |
aaff4b55 | 1574 | struct sk_buff *reply; |
d6569377 BP |
1575 | struct datapath *dp; |
1576 | struct vport *vport; | |
2a4999f3 | 1577 | struct ovs_net *ovs_net; |
95b1d73a | 1578 | int err, i; |
d6569377 | 1579 | |
d6569377 | 1580 | err = -EINVAL; |
ea36840f | 1581 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1582 | goto err; |
1583 | ||
df2c07f4 | 1584 | err = ovs_dp_cmd_validate(a); |
aaff4b55 BP |
1585 | if (err) |
1586 | goto err; | |
d6569377 BP |
1587 | |
1588 | rtnl_lock(); | |
d6569377 | 1589 | |
d6569377 BP |
1590 | err = -ENOMEM; |
1591 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1592 | if (dp == NULL) | |
2a4999f3 PS |
1593 | goto err_unlock_rtnl; |
1594 | ||
0ceaa66c JG |
1595 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1596 | ||
d6569377 BP |
1597 | /* Allocate table. */ |
1598 | err = -ENOMEM; | |
850b6b3b | 1599 | rcu_assign_pointer(dp->table, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS)); |
d6569377 BP |
1600 | if (!dp->table) |
1601 | goto err_free_dp; | |
1602 | ||
99769a40 JG |
1603 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); |
1604 | if (!dp->stats_percpu) { | |
1605 | err = -ENOMEM; | |
1606 | goto err_destroy_table; | |
1607 | } | |
1608 | ||
95b1d73a PS |
1609 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1610 | GFP_KERNEL); | |
1611 | if (!dp->ports) { | |
1612 | err = -ENOMEM; | |
1613 | goto err_destroy_percpu; | |
1614 | } | |
1615 | ||
1616 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1617 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1618 | ||
d6569377 | 1619 | /* Set up our datapath device. */ |
df2c07f4 JP |
1620 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1621 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1622 | parms.options = NULL; |
1623 | parms.dp = dp; | |
df2c07f4 | 1624 | parms.port_no = OVSP_LOCAL; |
28aea917 | 1625 | parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
b063d9f0 | 1626 | |
d6569377 BP |
1627 | vport = new_vport(&parms); |
1628 | if (IS_ERR(vport)) { | |
1629 | err = PTR_ERR(vport); | |
1630 | if (err == -EBUSY) | |
1631 | err = -EEXIST; | |
1632 | ||
95b1d73a | 1633 | goto err_destroy_ports_array; |
d6569377 | 1634 | } |
d6569377 | 1635 | |
28aea917 | 1636 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1637 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1638 | err = PTR_ERR(reply); |
1639 | if (IS_ERR(reply)) | |
1640 | goto err_destroy_local_port; | |
1641 | ||
2a4999f3 PS |
1642 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
1643 | list_add_tail(&dp->list_node, &ovs_net->dps); | |
d6569377 | 1644 | |
d6569377 BP |
1645 | rtnl_unlock(); |
1646 | ||
e297c6b7 | 1647 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
d6569377 BP |
1648 | return 0; |
1649 | ||
1650 | err_destroy_local_port: | |
95b1d73a PS |
1651 | ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL)); |
1652 | err_destroy_ports_array: | |
1653 | kfree(dp->ports); | |
99769a40 JG |
1654 | err_destroy_percpu: |
1655 | free_percpu(dp->stats_percpu); | |
d6569377 | 1656 | err_destroy_table: |
850b6b3b | 1657 | ovs_flow_tbl_destroy(genl_dereference(dp->table)); |
d6569377 | 1658 | err_free_dp: |
0ceaa66c | 1659 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1660 | kfree(dp); |
ed099e92 | 1661 | err_unlock_rtnl: |
d6569377 | 1662 | rtnl_unlock(); |
d6569377 | 1663 | err: |
064af421 BP |
1664 | return err; |
1665 | } | |
1666 | ||
2a4999f3 PS |
1667 | /* Called with genl_mutex. */ |
1668 | static void __dp_destroy(struct datapath *dp) | |
44e05eca | 1669 | { |
95b1d73a | 1670 | int i; |
44e05eca | 1671 | |
d6569377 | 1672 | rtnl_lock(); |
95b1d73a PS |
1673 | |
1674 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1675 | struct vport *vport; | |
f8dfbcb7 | 1676 | struct hlist_node *n; |
95b1d73a | 1677 | |
f8dfbcb7 | 1678 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1679 | if (vport->port_no != OVSP_LOCAL) |
1680 | ovs_dp_detach_port(vport); | |
1681 | } | |
ed099e92 | 1682 | |
254f2dc8 | 1683 | list_del(&dp->list_node); |
95b1d73a | 1684 | ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL)); |
ed099e92 | 1685 | |
99620d2c JG |
1686 | /* rtnl_unlock() will wait until all the references to devices that |
1687 | * are pending unregistration have been dropped. We do it here to | |
1688 | * ensure that any internal devices (which contain DP pointers) are | |
1689 | * fully destroyed before freeing the datapath. | |
1690 | */ | |
1691 | rtnl_unlock(); | |
1692 | ||
ed099e92 | 1693 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1694 | } |
1695 | ||
1696 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1697 | { | |
1698 | struct sk_buff *reply; | |
1699 | struct datapath *dp; | |
1700 | int err; | |
1701 | ||
1702 | err = ovs_dp_cmd_validate(info->attrs); | |
1703 | if (err) | |
1704 | return err; | |
1705 | ||
1706 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
1707 | err = PTR_ERR(dp); | |
1708 | if (IS_ERR(dp)) | |
1709 | return err; | |
1710 | ||
28aea917 | 1711 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
2a4999f3 PS |
1712 | info->snd_seq, OVS_DP_CMD_DEL); |
1713 | err = PTR_ERR(reply); | |
1714 | if (IS_ERR(reply)) | |
1715 | return err; | |
1716 | ||
1717 | __dp_destroy(dp); | |
ed099e92 | 1718 | |
e297c6b7 | 1719 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
99620d2c JG |
1720 | |
1721 | return 0; | |
44e05eca BP |
1722 | } |
1723 | ||
df2c07f4 | 1724 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1725 | { |
aaff4b55 | 1726 | struct sk_buff *reply; |
d6569377 | 1727 | struct datapath *dp; |
d6569377 | 1728 | int err; |
064af421 | 1729 | |
df2c07f4 | 1730 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1731 | if (err) |
1732 | return err; | |
38c6ecbc | 1733 | |
2a4999f3 | 1734 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
d6569377 | 1735 | if (IS_ERR(dp)) |
aaff4b55 | 1736 | return PTR_ERR(dp); |
38c6ecbc | 1737 | |
28aea917 | 1738 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1739 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1740 | if (IS_ERR(reply)) { |
1741 | err = PTR_ERR(reply); | |
2a4999f3 | 1742 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
850b6b3b | 1743 | ovs_dp_datapath_multicast_group.id, err); |
aaff4b55 BP |
1744 | return 0; |
1745 | } | |
1746 | ||
e297c6b7 | 1747 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
850b6b3b | 1748 | |
aaff4b55 | 1749 | return 0; |
064af421 BP |
1750 | } |
1751 | ||
df2c07f4 | 1752 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1753 | { |
aaff4b55 | 1754 | struct sk_buff *reply; |
d6569377 | 1755 | struct datapath *dp; |
d6569377 | 1756 | int err; |
1dcf111b | 1757 | |
df2c07f4 | 1758 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1759 | if (err) |
1760 | return err; | |
1dcf111b | 1761 | |
2a4999f3 | 1762 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
d6569377 | 1763 | if (IS_ERR(dp)) |
aaff4b55 | 1764 | return PTR_ERR(dp); |
1dcf111b | 1765 | |
28aea917 | 1766 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1767 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1768 | if (IS_ERR(reply)) |
1769 | return PTR_ERR(reply); | |
1770 | ||
1771 | return genlmsg_reply(reply, info); | |
1dcf111b JP |
1772 | } |
1773 | ||
df2c07f4 | 1774 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1775 | { |
2a4999f3 | 1776 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1777 | struct datapath *dp; |
1778 | int skip = cb->args[0]; | |
1779 | int i = 0; | |
a7786963 | 1780 | |
2a4999f3 | 1781 | list_for_each_entry(dp, &ovs_net->dps, list_node) { |
a2bab2f0 | 1782 | if (i >= skip && |
28aea917 | 1783 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1784 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1785 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1786 | break; |
254f2dc8 | 1787 | i++; |
a7786963 | 1788 | } |
aaff4b55 | 1789 | |
254f2dc8 BP |
1790 | cb->args[0] = i; |
1791 | ||
aaff4b55 | 1792 | return skb->len; |
c19e6535 BP |
1793 | } |
1794 | ||
aaff4b55 | 1795 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1796 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1797 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1798 | .policy = datapath_policy, | |
df2c07f4 | 1799 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1800 | }, |
df2c07f4 | 1801 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1802 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1803 | .policy = datapath_policy, | |
df2c07f4 | 1804 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1805 | }, |
df2c07f4 | 1806 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1807 | .flags = 0, /* OK for unprivileged users. */ |
1808 | .policy = datapath_policy, | |
df2c07f4 JP |
1809 | .doit = ovs_dp_cmd_get, |
1810 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1811 | }, |
df2c07f4 | 1812 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1813 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1814 | .policy = datapath_policy, | |
df2c07f4 | 1815 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1816 | }, |
1817 | }; | |
1818 | ||
df2c07f4 | 1819 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
f0fef760 | 1820 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1821 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1822 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
f0fef760 | 1823 | #else |
f613a0d7 | 1824 | [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) }, |
f0fef760 | 1825 | #endif |
d48c88ec JG |
1826 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1827 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1828 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1829 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1830 | }; |
1831 | ||
f0fef760 BP |
1832 | static struct genl_family dp_vport_genl_family = { |
1833 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1834 | .hdrsize = sizeof(struct ovs_header), |
1835 | .name = OVS_VPORT_FAMILY, | |
69685a88 | 1836 | .version = OVS_VPORT_VERSION, |
2a4999f3 PS |
1837 | .maxattr = OVS_VPORT_ATTR_MAX, |
1838 | SET_NETNSOK | |
f0fef760 BP |
1839 | }; |
1840 | ||
850b6b3b | 1841 | struct genl_multicast_group ovs_dp_vport_multicast_group = { |
df2c07f4 | 1842 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1843 | }; |
1844 | ||
1845 | /* Called with RTNL lock or RCU read lock. */ | |
df2c07f4 | 1846 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1847 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1848 | { |
df2c07f4 | 1849 | struct ovs_header *ovs_header; |
e926dfe3 | 1850 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1851 | int err; |
1852 | ||
28aea917 | 1853 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1854 | flags, cmd); |
df2c07f4 | 1855 | if (!ovs_header) |
f0fef760 | 1856 | return -EMSGSIZE; |
c19e6535 | 1857 | |
99769a40 | 1858 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1859 | |
c3cc8c03 DM |
1860 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1861 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
1862 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || | |
28aea917 | 1863 | nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid)) |
c3cc8c03 | 1864 | goto nla_put_failure; |
c19e6535 | 1865 | |
850b6b3b | 1866 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1867 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1868 | &vport_stats)) | |
1869 | goto nla_put_failure; | |
c19e6535 | 1870 | |
850b6b3b | 1871 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1872 | if (err == -EMSGSIZE) |
1873 | goto error; | |
c19e6535 | 1874 | |
df2c07f4 | 1875 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1876 | |
1877 | nla_put_failure: | |
1878 | err = -EMSGSIZE; | |
f0fef760 | 1879 | error: |
df2c07f4 | 1880 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1881 | return err; |
064af421 BP |
1882 | } |
1883 | ||
f0fef760 | 1884 | /* Called with RTNL lock or RCU read lock. */ |
28aea917 | 1885 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 1886 | u32 seq, u8 cmd) |
064af421 | 1887 | { |
c19e6535 | 1888 | struct sk_buff *skb; |
f0fef760 | 1889 | int retval; |
c19e6535 | 1890 | |
f0fef760 | 1891 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1892 | if (!skb) |
1893 | return ERR_PTR(-ENOMEM); | |
1894 | ||
28aea917 | 1895 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
1896 | BUG_ON(retval < 0); |
1897 | ||
c19e6535 | 1898 | return skb; |
f0fef760 | 1899 | } |
c19e6535 | 1900 | |
df2c07f4 | 1901 | static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
f0fef760 | 1902 | { |
df2c07f4 | 1903 | return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1); |
c19e6535 | 1904 | } |
51d4d598 | 1905 | |
ed099e92 | 1906 | /* Called with RTNL lock or RCU read lock. */ |
2a4999f3 PS |
1907 | static struct vport *lookup_vport(struct net *net, |
1908 | struct ovs_header *ovs_header, | |
df2c07f4 | 1909 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1910 | { |
1911 | struct datapath *dp; | |
1912 | struct vport *vport; | |
1913 | ||
df2c07f4 | 1914 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1915 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1916 | if (!vport) |
c19e6535 | 1917 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1918 | if (ovs_header->dp_ifindex && |
1919 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1920 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1921 | return vport; |
df2c07f4 JP |
1922 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1923 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1924 | |
1925 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1926 | return ERR_PTR(-EFBIG); |
c19e6535 | 1927 | |
2a4999f3 | 1928 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1929 | if (!dp) |
1930 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1931 | |
95b1d73a | 1932 | vport = ovs_vport_rtnl_rcu(dp, port_no); |
ed099e92 | 1933 | if (!vport) |
17535c57 | 1934 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1935 | return vport; |
1936 | } else | |
1937 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1938 | } |
1939 | ||
df2c07f4 | 1940 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1941 | { |
f0fef760 | 1942 | struct nlattr **a = info->attrs; |
df2c07f4 | 1943 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1944 | struct vport_parms parms; |
ed099e92 | 1945 | struct sk_buff *reply; |
c19e6535 | 1946 | struct vport *vport; |
c19e6535 | 1947 | struct datapath *dp; |
b0ec0f27 | 1948 | u32 port_no; |
c19e6535 | 1949 | int err; |
b0ec0f27 | 1950 | |
c19e6535 | 1951 | err = -EINVAL; |
ea36840f BP |
1952 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1953 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
f0fef760 BP |
1954 | goto exit; |
1955 | ||
df2c07f4 | 1956 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1957 | if (err) |
1958 | goto exit; | |
51d4d598 | 1959 | |
c19e6535 | 1960 | rtnl_lock(); |
2a4999f3 | 1961 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1962 | err = -ENODEV; |
1963 | if (!dp) | |
ed099e92 | 1964 | goto exit_unlock; |
c19e6535 | 1965 | |
df2c07f4 JP |
1966 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1967 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1968 | |
1969 | err = -EFBIG; | |
1970 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 1971 | goto exit_unlock; |
c19e6535 | 1972 | |
95b1d73a | 1973 | vport = ovs_vport_rtnl(dp, port_no); |
c19e6535 BP |
1974 | err = -EBUSY; |
1975 | if (vport) | |
ed099e92 | 1976 | goto exit_unlock; |
c19e6535 BP |
1977 | } else { |
1978 | for (port_no = 1; ; port_no++) { | |
1979 | if (port_no >= DP_MAX_PORTS) { | |
1980 | err = -EFBIG; | |
ed099e92 | 1981 | goto exit_unlock; |
c19e6535 | 1982 | } |
95b1d73a | 1983 | vport = ovs_vport_rtnl(dp, port_no); |
c19e6535 BP |
1984 | if (!vport) |
1985 | break; | |
51d4d598 | 1986 | } |
064af421 | 1987 | } |
b0ec0f27 | 1988 | |
df2c07f4 JP |
1989 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1990 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1991 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1992 | parms.dp = dp; |
1993 | parms.port_no = port_no; | |
28aea917 | 1994 | parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 BP |
1995 | |
1996 | vport = new_vport(&parms); | |
1997 | err = PTR_ERR(vport); | |
1998 | if (IS_ERR(vport)) | |
ed099e92 | 1999 | goto exit_unlock; |
c19e6535 | 2000 | |
faef6d2d | 2001 | err = 0; |
1fc7083d JG |
2002 | if (a[OVS_VPORT_ATTR_STATS]) |
2003 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
2004 | ||
2005 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, | |
2006 | OVS_VPORT_CMD_NEW); | |
2007 | if (IS_ERR(reply)) { | |
2008 | err = PTR_ERR(reply); | |
850b6b3b | 2009 | ovs_dp_detach_port(vport); |
ed099e92 | 2010 | goto exit_unlock; |
c19e6535 | 2011 | } |
e297c6b7 TG |
2012 | |
2013 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); | |
c19e6535 | 2014 | |
ed099e92 | 2015 | exit_unlock: |
c19e6535 | 2016 | rtnl_unlock(); |
c19e6535 BP |
2017 | exit: |
2018 | return err; | |
44e05eca BP |
2019 | } |
2020 | ||
df2c07f4 | 2021 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 2022 | { |
f0fef760 BP |
2023 | struct nlattr **a = info->attrs; |
2024 | struct sk_buff *reply; | |
c19e6535 | 2025 | struct vport *vport; |
c19e6535 | 2026 | int err; |
44e05eca | 2027 | |
df2c07f4 | 2028 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 2029 | if (err) |
c19e6535 BP |
2030 | goto exit; |
2031 | ||
2032 | rtnl_lock(); | |
2a4999f3 | 2033 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
2034 | err = PTR_ERR(vport); |
2035 | if (IS_ERR(vport)) | |
f0fef760 | 2036 | goto exit_unlock; |
44e05eca | 2037 | |
c19e6535 | 2038 | err = 0; |
6455100f | 2039 | if (a[OVS_VPORT_ATTR_TYPE] && |
16b82e84 | 2040 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) |
4879d4c7 | 2041 | err = -EINVAL; |
6455100f | 2042 | |
c25ea534 JG |
2043 | reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
2044 | if (!reply) { | |
2045 | err = -ENOMEM; | |
2046 | goto exit_unlock; | |
2047 | } | |
2048 | ||
4879d4c7 | 2049 | if (!err && a[OVS_VPORT_ATTR_OPTIONS]) |
850b6b3b | 2050 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
1fc7083d | 2051 | if (err) |
c25ea534 | 2052 | goto exit_free; |
1fc7083d JG |
2053 | |
2054 | if (a[OVS_VPORT_ATTR_STATS]) | |
2055 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
2056 | ||
2057 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) | |
28aea917 | 2058 | vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 | 2059 | |
c25ea534 JG |
2060 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2061 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2062 | BUG_ON(err < 0); | |
f0fef760 | 2063 | |
e297c6b7 | 2064 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
f0fef760 | 2065 | |
c25ea534 JG |
2066 | rtnl_unlock(); |
2067 | return 0; | |
2068 | ||
2069 | exit_free: | |
2070 | kfree_skb(reply); | |
f0fef760 | 2071 | exit_unlock: |
c19e6535 BP |
2072 | rtnl_unlock(); |
2073 | exit: | |
2074 | return err; | |
064af421 BP |
2075 | } |
2076 | ||
df2c07f4 | 2077 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2078 | { |
f0fef760 BP |
2079 | struct nlattr **a = info->attrs; |
2080 | struct sk_buff *reply; | |
c19e6535 | 2081 | struct vport *vport; |
c19e6535 BP |
2082 | int err; |
2083 | ||
df2c07f4 | 2084 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 2085 | if (err) |
c19e6535 BP |
2086 | goto exit; |
2087 | ||
2088 | rtnl_lock(); | |
2a4999f3 | 2089 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 2090 | err = PTR_ERR(vport); |
f0fef760 BP |
2091 | if (IS_ERR(vport)) |
2092 | goto exit_unlock; | |
c19e6535 | 2093 | |
df2c07f4 | 2094 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
2095 | err = -EINVAL; |
2096 | goto exit_unlock; | |
2097 | } | |
2098 | ||
28aea917 IY |
2099 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2100 | info->snd_seq, OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
2101 | err = PTR_ERR(reply); |
2102 | if (IS_ERR(reply)) | |
2103 | goto exit_unlock; | |
2104 | ||
b57d5819 | 2105 | err = 0; |
850b6b3b | 2106 | ovs_dp_detach_port(vport); |
f0fef760 | 2107 | |
e297c6b7 | 2108 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
f0fef760 BP |
2109 | |
2110 | exit_unlock: | |
c19e6535 BP |
2111 | rtnl_unlock(); |
2112 | exit: | |
2113 | return err; | |
7c40efc9 BP |
2114 | } |
2115 | ||
df2c07f4 | 2116 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2117 | { |
f0fef760 | 2118 | struct nlattr **a = info->attrs; |
df2c07f4 | 2119 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 2120 | struct sk_buff *reply; |
c19e6535 | 2121 | struct vport *vport; |
c19e6535 BP |
2122 | int err; |
2123 | ||
df2c07f4 | 2124 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
2125 | if (err) |
2126 | goto exit; | |
c19e6535 | 2127 | |
ed099e92 | 2128 | rcu_read_lock(); |
2a4999f3 | 2129 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2130 | err = PTR_ERR(vport); |
2131 | if (IS_ERR(vport)) | |
f0fef760 | 2132 | goto exit_unlock; |
c19e6535 | 2133 | |
28aea917 IY |
2134 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2135 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
2136 | err = PTR_ERR(reply); |
2137 | if (IS_ERR(reply)) | |
f0fef760 | 2138 | goto exit_unlock; |
ed099e92 | 2139 | |
df2fa9b5 JG |
2140 | rcu_read_unlock(); |
2141 | ||
2142 | return genlmsg_reply(reply, info); | |
ed099e92 | 2143 | |
f0fef760 | 2144 | exit_unlock: |
ed099e92 | 2145 | rcu_read_unlock(); |
f0fef760 | 2146 | exit: |
c19e6535 BP |
2147 | return err; |
2148 | } | |
2149 | ||
df2c07f4 | 2150 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2151 | { |
df2c07f4 | 2152 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2153 | struct datapath *dp; |
95b1d73a PS |
2154 | int bucket = cb->args[0], skip = cb->args[1]; |
2155 | int i, j = 0; | |
c19e6535 | 2156 | |
2a4999f3 | 2157 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 | 2158 | if (!dp) |
f0fef760 | 2159 | return -ENODEV; |
ed099e92 BP |
2160 | |
2161 | rcu_read_lock(); | |
95b1d73a | 2162 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2163 | struct vport *vport; |
95b1d73a PS |
2164 | |
2165 | j = 0; | |
f8dfbcb7 | 2166 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2167 | if (j >= skip && |
2168 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 2169 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2170 | cb->nlh->nlmsg_seq, |
2171 | NLM_F_MULTI, | |
2172 | OVS_VPORT_CMD_NEW) < 0) | |
2173 | goto out; | |
2174 | ||
2175 | j++; | |
2176 | } | |
2177 | skip = 0; | |
c19e6535 | 2178 | } |
95b1d73a | 2179 | out: |
ed099e92 | 2180 | rcu_read_unlock(); |
c19e6535 | 2181 | |
95b1d73a PS |
2182 | cb->args[0] = i; |
2183 | cb->args[1] = j; | |
f0fef760 | 2184 | |
95b1d73a | 2185 | return skb->len; |
7c40efc9 BP |
2186 | } |
2187 | ||
f0fef760 | 2188 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2189 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
2190 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2191 | .policy = vport_policy, | |
df2c07f4 | 2192 | .doit = ovs_vport_cmd_new |
f0fef760 | 2193 | }, |
df2c07f4 | 2194 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
2195 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2196 | .policy = vport_policy, | |
df2c07f4 | 2197 | .doit = ovs_vport_cmd_del |
f0fef760 | 2198 | }, |
df2c07f4 | 2199 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2200 | .flags = 0, /* OK for unprivileged users. */ |
2201 | .policy = vport_policy, | |
df2c07f4 JP |
2202 | .doit = ovs_vport_cmd_get, |
2203 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2204 | }, |
df2c07f4 | 2205 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
2206 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2207 | .policy = vport_policy, | |
df2c07f4 | 2208 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2209 | }, |
2210 | }; | |
2211 | ||
982b8810 BP |
2212 | struct genl_family_and_ops { |
2213 | struct genl_family *family; | |
2214 | struct genl_ops *ops; | |
2215 | int n_ops; | |
2216 | struct genl_multicast_group *group; | |
2217 | }; | |
ed099e92 | 2218 | |
982b8810 | 2219 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
2220 | { &dp_datapath_genl_family, |
2221 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
850b6b3b | 2222 | &ovs_dp_datapath_multicast_group }, |
f0fef760 BP |
2223 | { &dp_vport_genl_family, |
2224 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
850b6b3b | 2225 | &ovs_dp_vport_multicast_group }, |
37a1300c BP |
2226 | { &dp_flow_genl_family, |
2227 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
850b6b3b | 2228 | &ovs_dp_flow_multicast_group }, |
982b8810 BP |
2229 | { &dp_packet_genl_family, |
2230 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
2231 | NULL }, | |
2232 | }; | |
ed099e92 | 2233 | |
982b8810 BP |
2234 | static void dp_unregister_genl(int n_families) |
2235 | { | |
2236 | int i; | |
ed099e92 | 2237 | |
b867ca75 | 2238 | for (i = 0; i < n_families; i++) |
982b8810 | 2239 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
2240 | } |
2241 | ||
982b8810 | 2242 | static int dp_register_genl(void) |
064af421 | 2243 | { |
982b8810 BP |
2244 | int n_registered; |
2245 | int err; | |
2246 | int i; | |
064af421 | 2247 | |
982b8810 BP |
2248 | n_registered = 0; |
2249 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2250 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 2251 | |
982b8810 BP |
2252 | err = genl_register_family_with_ops(f->family, f->ops, |
2253 | f->n_ops); | |
2254 | if (err) | |
2255 | goto error; | |
2256 | n_registered++; | |
e22d4953 | 2257 | |
982b8810 BP |
2258 | if (f->group) { |
2259 | err = genl_register_mc_group(f->family, f->group); | |
2260 | if (err) | |
2261 | goto error; | |
2262 | } | |
2263 | } | |
9cc8b4e4 | 2264 | |
982b8810 | 2265 | return 0; |
064af421 BP |
2266 | |
2267 | error: | |
982b8810 BP |
2268 | dp_unregister_genl(n_registered); |
2269 | return err; | |
064af421 BP |
2270 | } |
2271 | ||
acd051f1 PS |
2272 | static int __rehash_flow_table(void *dummy) |
2273 | { | |
2274 | struct datapath *dp; | |
2a4999f3 PS |
2275 | struct net *net; |
2276 | ||
2277 | rtnl_lock(); | |
2278 | for_each_net(net) { | |
2279 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
acd051f1 | 2280 | |
2a4999f3 PS |
2281 | list_for_each_entry(dp, &ovs_net->dps, list_node) { |
2282 | struct flow_table *old_table = genl_dereference(dp->table); | |
2283 | struct flow_table *new_table; | |
acd051f1 | 2284 | |
2a4999f3 PS |
2285 | new_table = ovs_flow_tbl_rehash(old_table); |
2286 | if (!IS_ERR(new_table)) { | |
2287 | rcu_assign_pointer(dp->table, new_table); | |
2288 | ovs_flow_tbl_deferred_destroy(old_table); | |
2289 | } | |
acd051f1 PS |
2290 | } |
2291 | } | |
2a4999f3 | 2292 | rtnl_unlock(); |
acd051f1 PS |
2293 | return 0; |
2294 | } | |
2295 | ||
2296 | static void rehash_flow_table(struct work_struct *work) | |
2297 | { | |
2298 | genl_exec(__rehash_flow_table, NULL); | |
2299 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); | |
2300 | } | |
2301 | ||
2a4999f3 PS |
2302 | static int dp_destroy_all(void *data) |
2303 | { | |
2304 | struct datapath *dp, *dp_next; | |
2305 | struct ovs_net *ovs_net = data; | |
2306 | ||
2307 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2308 | __dp_destroy(dp); | |
2309 | ||
2310 | return 0; | |
2311 | } | |
2312 | ||
2313 | static int __net_init ovs_init_net(struct net *net) | |
2314 | { | |
2315 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2316 | ||
2317 | INIT_LIST_HEAD(&ovs_net->dps); | |
2318 | return 0; | |
2319 | } | |
2320 | ||
2321 | static void __net_exit ovs_exit_net(struct net *net) | |
2322 | { | |
2323 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2324 | ||
2325 | genl_exec(dp_destroy_all, ovs_net); | |
2326 | } | |
2327 | ||
2328 | static struct pernet_operations ovs_net_ops = { | |
2329 | .init = ovs_init_net, | |
2330 | .exit = ovs_exit_net, | |
2331 | .id = &ovs_net_id, | |
2332 | .size = sizeof(struct ovs_net), | |
2333 | }; | |
2334 | ||
22d24ebf BP |
2335 | static int __init dp_init(void) |
2336 | { | |
2337 | int err; | |
2338 | ||
f3d85db3 | 2339 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2340 | |
dc5f3fef | 2341 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 2342 | VERSION); |
064af421 | 2343 | |
b9c15df9 | 2344 | err = genl_exec_init(); |
064af421 BP |
2345 | if (err) |
2346 | goto error; | |
2347 | ||
16d650e5 | 2348 | err = ovs_workqueues_init(); |
b9c15df9 PS |
2349 | if (err) |
2350 | goto error_genl_exec; | |
2351 | ||
850b6b3b | 2352 | err = ovs_flow_init(); |
3544358a | 2353 | if (err) |
85c9de19 | 2354 | goto error_wq; |
3544358a | 2355 | |
850b6b3b | 2356 | err = ovs_vport_init(); |
064af421 BP |
2357 | if (err) |
2358 | goto error_flow_exit; | |
2359 | ||
2a4999f3 | 2360 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2361 | if (err) |
2362 | goto error_vport_exit; | |
2363 | ||
2a4999f3 PS |
2364 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2365 | if (err) | |
2366 | goto error_netns_exit; | |
2367 | ||
982b8810 BP |
2368 | err = dp_register_genl(); |
2369 | if (err < 0) | |
37a1300c | 2370 | goto error_unreg_notifier; |
982b8810 | 2371 | |
acd051f1 PS |
2372 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); |
2373 | ||
064af421 BP |
2374 | return 0; |
2375 | ||
2376 | error_unreg_notifier: | |
850b6b3b | 2377 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2378 | error_netns_exit: |
2379 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2380 | error_vport_exit: |
850b6b3b | 2381 | ovs_vport_exit(); |
064af421 | 2382 | error_flow_exit: |
850b6b3b | 2383 | ovs_flow_exit(); |
16d650e5 PS |
2384 | error_wq: |
2385 | ovs_workqueues_exit(); | |
b9c15df9 PS |
2386 | error_genl_exec: |
2387 | genl_exec_exit(); | |
064af421 BP |
2388 | error: |
2389 | return err; | |
2390 | } | |
2391 | ||
2392 | static void dp_cleanup(void) | |
2393 | { | |
acd051f1 | 2394 | cancel_delayed_work_sync(&rehash_flow_wq); |
982b8810 | 2395 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
850b6b3b | 2396 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2397 | unregister_pernet_device(&ovs_net_ops); |
2398 | rcu_barrier(); | |
850b6b3b JG |
2399 | ovs_vport_exit(); |
2400 | ovs_flow_exit(); | |
16d650e5 | 2401 | ovs_workqueues_exit(); |
b9c15df9 | 2402 | genl_exec_exit(); |
064af421 BP |
2403 | } |
2404 | ||
2405 | module_init(dp_init); | |
2406 | module_exit(dp_cleanup); | |
2407 | ||
2408 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2409 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2410 | MODULE_VERSION(VERSION); |