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064af421 | 1 | /* |
a1c564be | 2 | * Copyright (c) 2007-2013 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> |
cd2a59e9 PS |
51 | #include <linux/genetlink.h> |
52 | #include <net/genetlink.h> | |
36956a7d | 53 | #include <net/genetlink.h> |
2a4999f3 PS |
54 | #include <net/net_namespace.h> |
55 | #include <net/netns/generic.h> | |
064af421 | 56 | |
dd8d6b8c | 57 | #include "checksum.h" |
064af421 | 58 | #include "datapath.h" |
064af421 | 59 | #include "flow.h" |
303708cc | 60 | #include "vlan.h" |
3544358a | 61 | #include "tunnel.h" |
f2459fe7 | 62 | #include "vport-internal_dev.h" |
d5de5b0d | 63 | #include "vport-netdev.h" |
064af421 | 64 | |
4cf41591 | 65 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) || \ |
64807dfb JP |
66 | LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0) |
67 | #error Kernels before 2.6.18 or after 3.8 are not supported by this version of Open vSwitch. | |
4cf41591 JG |
68 | #endif |
69 | ||
acd051f1 PS |
70 | #define REHASH_FLOW_INTERVAL (10 * 60 * HZ) |
71 | static void rehash_flow_table(struct work_struct *work); | |
72 | static DECLARE_DELAYED_WORK(rehash_flow_wq, rehash_flow_table); | |
73 | ||
2a4999f3 PS |
74 | int ovs_net_id __read_mostly; |
75 | ||
e297c6b7 TG |
76 | static void ovs_notify(struct sk_buff *skb, struct genl_info *info, |
77 | struct genl_multicast_group *grp) | |
78 | { | |
79 | genl_notify(skb, genl_info_net(info), info->snd_portid, | |
80 | grp->id, info->nlhdr, GFP_KERNEL); | |
81 | } | |
82 | ||
ed099e92 BP |
83 | /** |
84 | * DOC: Locking: | |
064af421 | 85 | * |
cd2a59e9 PS |
86 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
87 | * operations on vports, etc.), Writes to other state (flow table | |
88 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
89 | * by ovs_lock. | |
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. | |
cd2a59e9 PS |
96 | * |
97 | * The RTNL lock nests inside ovs_mutex. | |
064af421 | 98 | */ |
ed099e92 | 99 | |
cd2a59e9 PS |
100 | static DEFINE_MUTEX(ovs_mutex); |
101 | ||
102 | void ovs_lock(void) | |
103 | { | |
104 | mutex_lock(&ovs_mutex); | |
105 | } | |
106 | ||
107 | void ovs_unlock(void) | |
108 | { | |
109 | mutex_unlock(&ovs_mutex); | |
110 | } | |
111 | ||
112 | #ifdef CONFIG_LOCKDEP | |
113 | int lockdep_ovsl_is_held(void) | |
114 | { | |
115 | if (debug_locks) | |
116 | return lockdep_is_held(&ovs_mutex); | |
117 | else | |
118 | return 1; | |
119 | } | |
120 | #endif | |
121 | ||
c19e6535 | 122 | static struct vport *new_vport(const struct vport_parms *); |
2a4999f3 | 123 | static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *, |
7257b535 | 124 | const struct dp_upcall_info *); |
2a4999f3 PS |
125 | static int queue_userspace_packet(struct net *, int dp_ifindex, |
126 | struct sk_buff *, | |
7257b535 | 127 | const struct dp_upcall_info *); |
064af421 | 128 | |
cd2a59e9 | 129 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 130 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
064af421 | 131 | { |
254f2dc8 BP |
132 | struct datapath *dp = NULL; |
133 | struct net_device *dev; | |
ed099e92 | 134 | |
254f2dc8 | 135 | rcu_read_lock(); |
2a4999f3 | 136 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
254f2dc8 | 137 | if (dev) { |
850b6b3b | 138 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 BP |
139 | if (vport) |
140 | dp = vport->dp; | |
141 | } | |
142 | rcu_read_unlock(); | |
143 | ||
144 | return dp; | |
064af421 | 145 | } |
064af421 | 146 | |
cd2a59e9 | 147 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 148 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 149 | { |
cd2a59e9 | 150 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
16b82e84 | 151 | return vport->ops->get_name(vport); |
f2459fe7 JG |
152 | } |
153 | ||
99769a40 JG |
154 | static int get_dpifindex(struct datapath *dp) |
155 | { | |
156 | struct vport *local; | |
157 | int ifindex; | |
158 | ||
159 | rcu_read_lock(); | |
160 | ||
95b1d73a | 161 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 162 | if (local) |
d5de5b0d | 163 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
99769a40 JG |
164 | else |
165 | ifindex = 0; | |
166 | ||
167 | rcu_read_unlock(); | |
168 | ||
169 | return ifindex; | |
170 | } | |
171 | ||
46c6a11d JG |
172 | static void destroy_dp_rcu(struct rcu_head *rcu) |
173 | { | |
174 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 175 | |
a1c564be | 176 | ovs_flow_tbl_destroy((__force struct flow_table *)dp->table, false); |
46c6a11d | 177 | free_percpu(dp->stats_percpu); |
2a4999f3 | 178 | release_net(ovs_dp_get_net(dp)); |
95b1d73a | 179 | kfree(dp->ports); |
5ca1ba48 | 180 | kfree(dp); |
46c6a11d JG |
181 | } |
182 | ||
95b1d73a PS |
183 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
184 | u16 port_no) | |
185 | { | |
186 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
187 | } | |
188 | ||
189 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) | |
190 | { | |
191 | struct vport *vport; | |
95b1d73a PS |
192 | struct hlist_head *head; |
193 | ||
194 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 195 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
196 | if (vport->port_no == port_no) |
197 | return vport; | |
198 | } | |
199 | return NULL; | |
200 | } | |
201 | ||
cd2a59e9 | 202 | /* Called with ovs_mutex. */ |
c19e6535 | 203 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 204 | { |
f2459fe7 | 205 | struct vport *vport; |
f2459fe7 | 206 | |
850b6b3b | 207 | vport = ovs_vport_add(parms); |
c19e6535 BP |
208 | if (!IS_ERR(vport)) { |
209 | struct datapath *dp = parms->dp; | |
95b1d73a | 210 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 211 | |
95b1d73a | 212 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 213 | } |
c19e6535 | 214 | return vport; |
064af421 BP |
215 | } |
216 | ||
850b6b3b | 217 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 218 | { |
cd2a59e9 | 219 | ASSERT_OVSL(); |
064af421 | 220 | |
064af421 | 221 | /* First drop references to device. */ |
95b1d73a | 222 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 223 | |
7237e4f4 | 224 | /* Then destroy it. */ |
850b6b3b | 225 | ovs_vport_del(p); |
064af421 BP |
226 | } |
227 | ||
8819fac7 | 228 | /* Must be called with rcu_read_lock. */ |
850b6b3b | 229 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
230 | { |
231 | struct datapath *dp = p->dp; | |
3544358a | 232 | struct sw_flow *flow; |
064af421 | 233 | struct dp_stats_percpu *stats; |
52a23d92 | 234 | struct sw_flow_key key; |
e9141eec | 235 | u64 *stats_counter; |
4c1ad233 | 236 | int error; |
064af421 | 237 | |
70dbc259 | 238 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 239 | |
52a23d92 | 240 | /* Extract flow from 'skb' into 'key'. */ |
a1c564be | 241 | error = ovs_flow_extract(skb, p->port_no, &key); |
52a23d92 JG |
242 | if (unlikely(error)) { |
243 | kfree_skb(skb); | |
244 | return; | |
55574bb0 BP |
245 | } |
246 | ||
52a23d92 | 247 | /* Look up flow. */ |
a1c564be | 248 | flow = ovs_flow_lookup(rcu_dereference(dp->table), &key); |
52a23d92 JG |
249 | if (unlikely(!flow)) { |
250 | struct dp_upcall_info upcall; | |
251 | ||
252 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
253 | upcall.key = &key; | |
254 | upcall.userdata = NULL; | |
255 | upcall.portid = p->upcall_portid; | |
256 | ovs_dp_upcall(dp, skb, &upcall); | |
257 | consume_skb(skb); | |
258 | stats_counter = &stats->n_missed; | |
259 | goto out; | |
260 | } | |
261 | ||
262 | OVS_CB(skb)->flow = flow; | |
263 | ||
e9141eec | 264 | stats_counter = &stats->n_hit; |
850b6b3b JG |
265 | ovs_flow_used(OVS_CB(skb)->flow, skb); |
266 | ovs_execute_actions(dp, skb); | |
55574bb0 | 267 | |
8819fac7 | 268 | out: |
55574bb0 | 269 | /* Update datapath statistics. */ |
821cb9fa | 270 | u64_stats_update_begin(&stats->sync); |
e9141eec | 271 | (*stats_counter)++; |
821cb9fa | 272 | u64_stats_update_end(&stats->sync); |
064af421 BP |
273 | } |
274 | ||
aa5a8fdc JG |
275 | static struct genl_family dp_packet_genl_family = { |
276 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
277 | .hdrsize = sizeof(struct ovs_header), |
278 | .name = OVS_PACKET_FAMILY, | |
69685a88 | 279 | .version = OVS_PACKET_VERSION, |
2a4999f3 PS |
280 | .maxattr = OVS_PACKET_ATTR_MAX, |
281 | SET_NETNSOK | |
aa5a8fdc JG |
282 | }; |
283 | ||
850b6b3b JG |
284 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
285 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc JG |
286 | { |
287 | struct dp_stats_percpu *stats; | |
7257b535 | 288 | int dp_ifindex; |
aa5a8fdc JG |
289 | int err; |
290 | ||
28aea917 | 291 | if (upcall_info->portid == 0) { |
b063d9f0 | 292 | err = -ENOTCONN; |
b063d9f0 JG |
293 | goto err; |
294 | } | |
295 | ||
7257b535 BP |
296 | dp_ifindex = get_dpifindex(dp); |
297 | if (!dp_ifindex) { | |
298 | err = -ENODEV; | |
299 | goto err; | |
aa5a8fdc JG |
300 | } |
301 | ||
7257b535 | 302 | forward_ip_summed(skb, true); |
36ce148c | 303 | |
7257b535 | 304 | if (!skb_is_gso(skb)) |
2a4999f3 | 305 | err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
7257b535 | 306 | else |
2a4999f3 | 307 | err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info); |
d76195db JG |
308 | if (err) |
309 | goto err; | |
310 | ||
311 | return 0; | |
aa5a8fdc | 312 | |
aa5a8fdc | 313 | err: |
70dbc259 | 314 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 315 | |
821cb9fa | 316 | u64_stats_update_begin(&stats->sync); |
aa5a8fdc | 317 | stats->n_lost++; |
821cb9fa | 318 | u64_stats_update_end(&stats->sync); |
aa5a8fdc | 319 | |
aa5a8fdc | 320 | return err; |
982b8810 BP |
321 | } |
322 | ||
2a4999f3 PS |
323 | static int queue_gso_packets(struct net *net, int dp_ifindex, |
324 | struct sk_buff *skb, | |
7257b535 | 325 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 326 | { |
d4cba1f8 | 327 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
328 | struct dp_upcall_info later_info; |
329 | struct sw_flow_key later_key; | |
330 | struct sk_buff *segs, *nskb; | |
331 | int err; | |
cb5087ca | 332 | |
0aa52d88 | 333 | segs = __skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM, false); |
79089764 PS |
334 | if (IS_ERR(segs)) |
335 | return PTR_ERR(segs); | |
99769a40 | 336 | |
7257b535 BP |
337 | /* Queue all of the segments. */ |
338 | skb = segs; | |
cb5087ca | 339 | do { |
2a4999f3 | 340 | err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info); |
982b8810 | 341 | if (err) |
7257b535 | 342 | break; |
856081f6 | 343 | |
d4cba1f8 | 344 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
e1cf87ff JG |
345 | /* The initial flow key extracted by ovs_flow_extract() |
346 | * in this case is for a first fragment, so we need to | |
7257b535 BP |
347 | * properly mark later fragments. |
348 | */ | |
349 | later_key = *upcall_info->key; | |
9e44d715 | 350 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
7257b535 BP |
351 | |
352 | later_info = *upcall_info; | |
353 | later_info.key = &later_key; | |
354 | upcall_info = &later_info; | |
355 | } | |
36ce148c | 356 | } while ((skb = skb->next)); |
cb5087ca | 357 | |
7257b535 BP |
358 | /* Free all of the segments. */ |
359 | skb = segs; | |
360 | do { | |
361 | nskb = skb->next; | |
362 | if (err) | |
363 | kfree_skb(skb); | |
364 | else | |
365 | consume_skb(skb); | |
366 | } while ((skb = nskb)); | |
367 | return err; | |
368 | } | |
369 | ||
0afa2373 TG |
370 | static size_t key_attr_size(void) |
371 | { | |
372 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
373 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ | |
374 | + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
375 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
376 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
377 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
378 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
379 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
380 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
381 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ | |
382 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
383 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
384 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
385 | + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */ | |
386 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
387 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
388 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
389 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
390 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
391 | } | |
392 | ||
393 | static size_t upcall_msg_size(const struct sk_buff *skb, | |
394 | const struct nlattr *userdata) | |
395 | { | |
396 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
397 | + nla_total_size(skb->len) /* OVS_PACKET_ATTR_PACKET */ | |
398 | + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */ | |
399 | ||
400 | /* OVS_PACKET_ATTR_USERDATA */ | |
401 | if (userdata) | |
402 | size += NLA_ALIGN(userdata->nla_len); | |
403 | ||
404 | return size; | |
405 | } | |
406 | ||
2a4999f3 PS |
407 | static int queue_userspace_packet(struct net *net, int dp_ifindex, |
408 | struct sk_buff *skb, | |
7257b535 BP |
409 | const struct dp_upcall_info *upcall_info) |
410 | { | |
411 | struct ovs_header *upcall; | |
6161d3fd | 412 | struct sk_buff *nskb = NULL; |
7257b535 BP |
413 | struct sk_buff *user_skb; /* to be queued to userspace */ |
414 | struct nlattr *nla; | |
7257b535 BP |
415 | int err; |
416 | ||
6161d3fd JG |
417 | if (vlan_tx_tag_present(skb)) { |
418 | nskb = skb_clone(skb, GFP_ATOMIC); | |
419 | if (!nskb) | |
420 | return -ENOMEM; | |
421 | ||
422 | err = vlan_deaccel_tag(nskb); | |
423 | if (err) | |
424 | return err; | |
7257b535 | 425 | |
6161d3fd JG |
426 | skb = nskb; |
427 | } | |
428 | ||
429 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
430 | err = -EFBIG; | |
431 | goto out; | |
432 | } | |
7257b535 | 433 | |
0afa2373 | 434 | user_skb = genlmsg_new(upcall_msg_size(skb, upcall_info->userdata), GFP_ATOMIC); |
6161d3fd JG |
435 | if (!user_skb) { |
436 | err = -ENOMEM; | |
437 | goto out; | |
438 | } | |
7257b535 BP |
439 | |
440 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
441 | 0, upcall_info->cmd); | |
442 | upcall->dp_ifindex = dp_ifindex; | |
443 | ||
444 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
a1c564be | 445 | ovs_flow_to_nlattrs(upcall_info->key, upcall_info->key, user_skb); |
7257b535 BP |
446 | nla_nest_end(user_skb, nla); |
447 | ||
448 | if (upcall_info->userdata) | |
e995e3df | 449 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 450 | nla_len(upcall_info->userdata), |
e995e3df | 451 | nla_data(upcall_info->userdata)); |
7257b535 BP |
452 | |
453 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); | |
bed53bd1 PS |
454 | |
455 | skb_copy_and_csum_dev(skb, nla_data(nla)); | |
7257b535 | 456 | |
c39b1a5c | 457 | genlmsg_end(user_skb, upcall); |
28aea917 | 458 | err = genlmsg_unicast(net, user_skb, upcall_info->portid); |
6161d3fd JG |
459 | |
460 | out: | |
461 | kfree_skb(nskb); | |
462 | return err; | |
cb5087ca BP |
463 | } |
464 | ||
cd2a59e9 | 465 | /* Called with ovs_mutex. */ |
2a4999f3 | 466 | static int flush_flows(struct datapath *dp) |
064af421 | 467 | { |
3544358a PS |
468 | struct flow_table *old_table; |
469 | struct flow_table *new_table; | |
8d5ebd83 | 470 | |
cd2a59e9 | 471 | old_table = ovsl_dereference(dp->table); |
850b6b3b | 472 | new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS); |
8d5ebd83 | 473 | if (!new_table) |
ed099e92 | 474 | return -ENOMEM; |
8d5ebd83 JG |
475 | |
476 | rcu_assign_pointer(dp->table, new_table); | |
477 | ||
a1c564be | 478 | ovs_flow_tbl_destroy(old_table, true); |
ed099e92 | 479 | return 0; |
064af421 BP |
480 | } |
481 | ||
9b405f1a PS |
482 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, int attr_len) |
483 | { | |
484 | ||
485 | struct sw_flow_actions *acts; | |
486 | int new_acts_size; | |
487 | int req_size = NLA_ALIGN(attr_len); | |
488 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
489 | (*sfa)->actions_len; | |
490 | ||
ba400435 | 491 | if (req_size <= (ksize(*sfa) - next_offset)) |
9b405f1a PS |
492 | goto out; |
493 | ||
ba400435 | 494 | new_acts_size = ksize(*sfa) * 2; |
9b405f1a PS |
495 | |
496 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
497 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
498 | return ERR_PTR(-EMSGSIZE); | |
499 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
500 | } | |
501 | ||
502 | acts = ovs_flow_actions_alloc(new_acts_size); | |
503 | if (IS_ERR(acts)) | |
504 | return (void *)acts; | |
505 | ||
506 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
507 | acts->actions_len = (*sfa)->actions_len; | |
ba400435 | 508 | kfree(*sfa); |
9b405f1a PS |
509 | *sfa = acts; |
510 | ||
511 | out: | |
512 | (*sfa)->actions_len += req_size; | |
513 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
514 | } | |
515 | ||
516 | static int add_action(struct sw_flow_actions **sfa, int attrtype, void *data, int len) | |
517 | { | |
518 | struct nlattr *a; | |
519 | ||
520 | a = reserve_sfa_size(sfa, nla_attr_size(len)); | |
521 | if (IS_ERR(a)) | |
522 | return PTR_ERR(a); | |
523 | ||
524 | a->nla_type = attrtype; | |
525 | a->nla_len = nla_attr_size(len); | |
526 | ||
527 | if (data) | |
528 | memcpy(nla_data(a), data, len); | |
529 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
6ff686f2 | 530 | |
9b405f1a PS |
531 | return 0; |
532 | } | |
533 | ||
534 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, int attrtype) | |
535 | { | |
536 | int used = (*sfa)->actions_len; | |
537 | int err; | |
538 | ||
539 | err = add_action(sfa, attrtype, NULL, 0); | |
540 | if (err) | |
541 | return err; | |
542 | ||
543 | return used; | |
544 | } | |
545 | ||
546 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, int st_offset) | |
547 | { | |
548 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + st_offset); | |
549 | ||
550 | a->nla_len = sfa->actions_len - st_offset; | |
551 | } | |
552 | ||
553 | static int validate_and_copy_actions(const struct nlattr *attr, | |
554 | const struct sw_flow_key *key, int depth, | |
555 | struct sw_flow_actions **sfa); | |
556 | ||
557 | static int validate_and_copy_sample(const struct nlattr *attr, | |
558 | const struct sw_flow_key *key, int depth, | |
559 | struct sw_flow_actions **sfa) | |
6ff686f2 | 560 | { |
4be00e48 BP |
561 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; |
562 | const struct nlattr *probability, *actions; | |
563 | const struct nlattr *a; | |
9b405f1a | 564 | int rem, start, err, st_acts; |
4be00e48 BP |
565 | |
566 | memset(attrs, 0, sizeof(attrs)); | |
6455100f | 567 | nla_for_each_nested(a, attr, rem) { |
4be00e48 BP |
568 | int type = nla_type(a); |
569 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
570 | return -EINVAL; | |
571 | attrs[type] = a; | |
572 | } | |
573 | if (rem) | |
6ff686f2 | 574 | return -EINVAL; |
4be00e48 BP |
575 | |
576 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
577 | if (!probability || nla_len(probability) != sizeof(u32)) | |
6ff686f2 PS |
578 | return -EINVAL; |
579 | ||
4be00e48 BP |
580 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; |
581 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
582 | return -EINVAL; | |
9b405f1a PS |
583 | |
584 | /* validation done, copy sample action. */ | |
585 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE); | |
586 | if (start < 0) | |
587 | return start; | |
588 | err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, nla_data(probability), sizeof(u32)); | |
589 | if (err) | |
590 | return err; | |
591 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS); | |
592 | if (st_acts < 0) | |
593 | return st_acts; | |
594 | ||
595 | err = validate_and_copy_actions(actions, key, depth + 1, sfa); | |
596 | if (err) | |
597 | return err; | |
598 | ||
599 | add_nested_action_end(*sfa, st_acts); | |
600 | add_nested_action_end(*sfa, start); | |
601 | ||
602 | return 0; | |
4edb9ae9 PS |
603 | } |
604 | ||
b1323f59 PS |
605 | static int validate_tp_port(const struct sw_flow_key *flow_key) |
606 | { | |
607 | if (flow_key->eth.type == htons(ETH_P_IP)) { | |
6e9bea4d | 608 | if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst) |
b1323f59 PS |
609 | return 0; |
610 | } else if (flow_key->eth.type == htons(ETH_P_IPV6)) { | |
6e9bea4d | 611 | if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst) |
b1323f59 PS |
612 | return 0; |
613 | } | |
614 | ||
615 | return -EINVAL; | |
616 | } | |
617 | ||
9b405f1a PS |
618 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
619 | struct sw_flow_actions **sfa) | |
620 | { | |
a1c564be AZ |
621 | struct sw_flow_match match; |
622 | struct sw_flow_key key; | |
9b405f1a PS |
623 | int err, start; |
624 | ||
a1c564be AZ |
625 | ovs_match_init(&match, &key, NULL); |
626 | err = ipv4_tun_from_nlattr(nla_data(attr), &match, false); | |
9b405f1a PS |
627 | if (err) |
628 | return err; | |
629 | ||
630 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET); | |
631 | if (start < 0) | |
632 | return start; | |
633 | ||
a1c564be AZ |
634 | err = add_action(sfa, OVS_KEY_ATTR_IPV4_TUNNEL, &match.key->tun_key, |
635 | sizeof(match.key->tun_key)); | |
9b405f1a PS |
636 | add_nested_action_end(*sfa, start); |
637 | ||
638 | return err; | |
639 | } | |
640 | ||
fea393b1 | 641 | static int validate_set(const struct nlattr *a, |
9b405f1a PS |
642 | const struct sw_flow_key *flow_key, |
643 | struct sw_flow_actions **sfa, | |
644 | bool *set_tun) | |
4edb9ae9 | 645 | { |
4edb9ae9 PS |
646 | const struct nlattr *ovs_key = nla_data(a); |
647 | int key_type = nla_type(ovs_key); | |
648 | ||
649 | /* There can be only one key in a action */ | |
650 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
651 | return -EINVAL; | |
652 | ||
653 | if (key_type > OVS_KEY_ATTR_MAX || | |
9b405f1a PS |
654 | (ovs_key_lens[key_type] != nla_len(ovs_key) && |
655 | ovs_key_lens[key_type] != -1)) | |
4edb9ae9 PS |
656 | return -EINVAL; |
657 | ||
fea393b1 | 658 | switch (key_type) { |
4edb9ae9 | 659 | const struct ovs_key_ipv4 *ipv4_key; |
bc7a5acd | 660 | const struct ovs_key_ipv6 *ipv6_key; |
9b405f1a | 661 | int err; |
4edb9ae9 | 662 | |
fea393b1 | 663 | case OVS_KEY_ATTR_PRIORITY: |
fea393b1 | 664 | case OVS_KEY_ATTR_ETHERNET: |
4edb9ae9 PS |
665 | break; |
666 | ||
72e8bf28 AA |
667 | case OVS_KEY_ATTR_SKB_MARK: |
668 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER) | |
669 | if (nla_get_u32(ovs_key) != 0) | |
670 | return -EINVAL; | |
671 | #endif | |
672 | break; | |
673 | ||
9b405f1a PS |
674 | case OVS_KEY_ATTR_TUNNEL: |
675 | *set_tun = true; | |
676 | err = validate_and_copy_set_tun(a, sfa); | |
677 | if (err) | |
678 | return err; | |
356af50b KM |
679 | break; |
680 | ||
fea393b1 | 681 | case OVS_KEY_ATTR_IPV4: |
4edb9ae9 PS |
682 | if (flow_key->eth.type != htons(ETH_P_IP)) |
683 | return -EINVAL; | |
684 | ||
6e9bea4d | 685 | if (!flow_key->ip.proto) |
4edb9ae9 PS |
686 | return -EINVAL; |
687 | ||
688 | ipv4_key = nla_data(ovs_key); | |
689 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
690 | return -EINVAL; | |
691 | ||
9e44d715 | 692 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) |
7257b535 BP |
693 | return -EINVAL; |
694 | ||
4edb9ae9 PS |
695 | break; |
696 | ||
bc7a5acd AA |
697 | case OVS_KEY_ATTR_IPV6: |
698 | if (flow_key->eth.type != htons(ETH_P_IPV6)) | |
699 | return -EINVAL; | |
700 | ||
701 | if (!flow_key->ip.proto) | |
702 | return -EINVAL; | |
703 | ||
704 | ipv6_key = nla_data(ovs_key); | |
705 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
706 | return -EINVAL; | |
707 | ||
708 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) | |
709 | return -EINVAL; | |
710 | ||
711 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) | |
712 | return -EINVAL; | |
713 | ||
714 | break; | |
715 | ||
fea393b1 | 716 | case OVS_KEY_ATTR_TCP: |
4edb9ae9 PS |
717 | if (flow_key->ip.proto != IPPROTO_TCP) |
718 | return -EINVAL; | |
719 | ||
b1323f59 | 720 | return validate_tp_port(flow_key); |
4edb9ae9 | 721 | |
fea393b1 | 722 | case OVS_KEY_ATTR_UDP: |
4edb9ae9 PS |
723 | if (flow_key->ip.proto != IPPROTO_UDP) |
724 | return -EINVAL; | |
725 | ||
b1323f59 | 726 | return validate_tp_port(flow_key); |
4edb9ae9 PS |
727 | |
728 | default: | |
729 | return -EINVAL; | |
730 | } | |
fea393b1 | 731 | |
4edb9ae9 | 732 | return 0; |
6ff686f2 PS |
733 | } |
734 | ||
98403001 BP |
735 | static int validate_userspace(const struct nlattr *attr) |
736 | { | |
6455100f | 737 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { |
98403001 | 738 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, |
e995e3df | 739 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, |
98403001 BP |
740 | }; |
741 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
742 | int error; | |
743 | ||
6455100f PS |
744 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, |
745 | attr, userspace_policy); | |
98403001 BP |
746 | if (error) |
747 | return error; | |
748 | ||
6455100f PS |
749 | if (!a[OVS_USERSPACE_ATTR_PID] || |
750 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
98403001 BP |
751 | return -EINVAL; |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
9b405f1a PS |
756 | static int copy_action(const struct nlattr *from, |
757 | struct sw_flow_actions **sfa) | |
758 | { | |
759 | int totlen = NLA_ALIGN(from->nla_len); | |
760 | struct nlattr *to; | |
761 | ||
762 | to = reserve_sfa_size(sfa, from->nla_len); | |
763 | if (IS_ERR(to)) | |
764 | return PTR_ERR(to); | |
765 | ||
766 | memcpy(to, from, totlen); | |
767 | return 0; | |
768 | } | |
769 | ||
770 | static int validate_and_copy_actions(const struct nlattr *attr, | |
771 | const struct sw_flow_key *key, | |
772 | int depth, | |
773 | struct sw_flow_actions **sfa) | |
064af421 | 774 | { |
23cad98c | 775 | const struct nlattr *a; |
6ff686f2 PS |
776 | int rem, err; |
777 | ||
778 | if (depth >= SAMPLE_ACTION_DEPTH) | |
779 | return -EOVERFLOW; | |
23cad98c | 780 | |
37a1300c | 781 | nla_for_each_nested(a, attr, rem) { |
98403001 | 782 | /* Expected argument lengths, (u32)-1 for variable length. */ |
df2c07f4 | 783 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
fea393b1 | 784 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), |
98403001 | 785 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
fea393b1 BP |
786 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
787 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
4edb9ae9 | 788 | [OVS_ACTION_ATTR_SET] = (u32)-1, |
98403001 | 789 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1 |
23cad98c | 790 | }; |
fea393b1 | 791 | const struct ovs_action_push_vlan *vlan; |
23cad98c | 792 | int type = nla_type(a); |
9b405f1a | 793 | bool skip_copy; |
23cad98c | 794 | |
6ff686f2 | 795 | if (type > OVS_ACTION_ATTR_MAX || |
98403001 BP |
796 | (action_lens[type] != nla_len(a) && |
797 | action_lens[type] != (u32)-1)) | |
23cad98c BP |
798 | return -EINVAL; |
799 | ||
9b405f1a | 800 | skip_copy = false; |
23cad98c | 801 | switch (type) { |
df2c07f4 | 802 | case OVS_ACTION_ATTR_UNSPEC: |
cdee00fd | 803 | return -EINVAL; |
064af421 | 804 | |
98403001 BP |
805 | case OVS_ACTION_ATTR_USERSPACE: |
806 | err = validate_userspace(a); | |
807 | if (err) | |
808 | return err; | |
809 | break; | |
810 | ||
df2c07f4 | 811 | case OVS_ACTION_ATTR_OUTPUT: |
23cad98c BP |
812 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
813 | return -EINVAL; | |
3b1fc5f3 | 814 | break; |
cdee00fd | 815 | |
4edb9ae9 | 816 | |
fea393b1 BP |
817 | case OVS_ACTION_ATTR_POP_VLAN: |
818 | break; | |
819 | ||
820 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
821 | vlan = nla_data(a); | |
822 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
823 | return -EINVAL; | |
8ddc056d | 824 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) |
064af421 | 825 | return -EINVAL; |
23cad98c | 826 | break; |
064af421 | 827 | |
4edb9ae9 | 828 | case OVS_ACTION_ATTR_SET: |
9b405f1a | 829 | err = validate_set(a, key, sfa, &skip_copy); |
4edb9ae9 PS |
830 | if (err) |
831 | return err; | |
23cad98c | 832 | break; |
064af421 | 833 | |
6ff686f2 | 834 | case OVS_ACTION_ATTR_SAMPLE: |
9b405f1a | 835 | err = validate_and_copy_sample(a, key, depth, sfa); |
6ff686f2 PS |
836 | if (err) |
837 | return err; | |
9b405f1a | 838 | skip_copy = true; |
6ff686f2 PS |
839 | break; |
840 | ||
23cad98c | 841 | default: |
4edb9ae9 | 842 | return -EINVAL; |
23cad98c | 843 | } |
9b405f1a PS |
844 | if (!skip_copy) { |
845 | err = copy_action(a, sfa); | |
846 | if (err) | |
847 | return err; | |
848 | } | |
23cad98c | 849 | } |
3c5f6de3 | 850 | |
23cad98c BP |
851 | if (rem > 0) |
852 | return -EINVAL; | |
064af421 | 853 | |
23cad98c | 854 | return 0; |
064af421 | 855 | } |
4edb9ae9 | 856 | |
064af421 BP |
857 | static void clear_stats(struct sw_flow *flow) |
858 | { | |
6bfafa55 | 859 | flow->used = 0; |
064af421 | 860 | flow->tcp_flags = 0; |
064af421 BP |
861 | flow->packet_count = 0; |
862 | flow->byte_count = 0; | |
863 | } | |
864 | ||
df2c07f4 | 865 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 866 | { |
df2c07f4 | 867 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 868 | struct nlattr **a = info->attrs; |
e0e57990 | 869 | struct sw_flow_actions *acts; |
982b8810 | 870 | struct sk_buff *packet; |
e0e57990 | 871 | struct sw_flow *flow; |
f7cd0081 | 872 | struct datapath *dp; |
d6569377 | 873 | struct ethhdr *eth; |
3f19d399 | 874 | int len; |
d6569377 | 875 | int err; |
064af421 | 876 | |
f7cd0081 | 877 | err = -EINVAL; |
df2c07f4 | 878 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 879 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 880 | goto err; |
064af421 | 881 | |
df2c07f4 | 882 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 883 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
884 | err = -ENOMEM; |
885 | if (!packet) | |
e5cad958 | 886 | goto err; |
3f19d399 BP |
887 | skb_reserve(packet, NET_IP_ALIGN); |
888 | ||
bf3d6fce | 889 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 890 | |
f7cd0081 BP |
891 | skb_reset_mac_header(packet); |
892 | eth = eth_hdr(packet); | |
064af421 | 893 | |
d6569377 BP |
894 | /* Normally, setting the skb 'protocol' field would be handled by a |
895 | * call to eth_type_trans(), but it assumes there's a sending | |
896 | * device, which we may not have. */ | |
7cd46155 | 897 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
f7cd0081 | 898 | packet->protocol = eth->h_proto; |
d6569377 | 899 | else |
f7cd0081 | 900 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 901 | |
e0e57990 | 902 | /* Build an sw_flow for sending this packet. */ |
850b6b3b | 903 | flow = ovs_flow_alloc(); |
e0e57990 BP |
904 | err = PTR_ERR(flow); |
905 | if (IS_ERR(flow)) | |
e5cad958 | 906 | goto err_kfree_skb; |
064af421 | 907 | |
a1c564be | 908 | err = ovs_flow_extract(packet, -1, &flow->key); |
e0e57990 | 909 | if (err) |
9321954a | 910 | goto err_flow_free; |
e0e57990 | 911 | |
a1c564be | 912 | err = ovs_flow_metadata_from_nlattrs(flow, a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 | 913 | if (err) |
9321954a | 914 | goto err_flow_free; |
9b405f1a | 915 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
e0e57990 BP |
916 | err = PTR_ERR(acts); |
917 | if (IS_ERR(acts)) | |
9321954a | 918 | goto err_flow_free; |
9b405f1a PS |
919 | |
920 | err = validate_and_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0, &acts); | |
e0e57990 | 921 | rcu_assign_pointer(flow->sf_acts, acts); |
9b405f1a PS |
922 | if (err) |
923 | goto err_flow_free; | |
e0e57990 BP |
924 | |
925 | OVS_CB(packet)->flow = flow; | |
abff858b | 926 | packet->priority = flow->key.phy.priority; |
72e8bf28 | 927 | skb_set_mark(packet, flow->key.phy.skb_mark); |
e0e57990 | 928 | |
d6569377 | 929 | rcu_read_lock(); |
2a4999f3 | 930 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 931 | err = -ENODEV; |
e5cad958 BP |
932 | if (!dp) |
933 | goto err_unlock; | |
cc4015df | 934 | |
e9141eec | 935 | local_bh_disable(); |
850b6b3b | 936 | err = ovs_execute_actions(dp, packet); |
e9141eec | 937 | local_bh_enable(); |
d6569377 | 938 | rcu_read_unlock(); |
e0e57990 | 939 | |
a1c564be | 940 | ovs_flow_free(flow, false); |
e5cad958 | 941 | return err; |
064af421 | 942 | |
e5cad958 BP |
943 | err_unlock: |
944 | rcu_read_unlock(); | |
9321954a | 945 | err_flow_free: |
a1c564be | 946 | ovs_flow_free(flow, false); |
e5cad958 BP |
947 | err_kfree_skb: |
948 | kfree_skb(packet); | |
949 | err: | |
d6569377 | 950 | return err; |
064af421 BP |
951 | } |
952 | ||
df2c07f4 | 953 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc TG |
954 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18) |
955 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, | |
956 | #else | |
957 | [OVS_PACKET_ATTR_PACKET] = { .minlen = ETH_HLEN }, | |
958 | #endif | |
df2c07f4 JP |
959 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
960 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
961 | }; |
962 | ||
963 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 964 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
965 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
966 | .policy = packet_policy, | |
df2c07f4 | 967 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
968 | } |
969 | }; | |
970 | ||
df2c07f4 | 971 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) |
064af421 | 972 | { |
d6569377 | 973 | int i; |
cd2a59e9 | 974 | struct flow_table *table = ovsl_dereference(dp->table); |
f180c2e2 | 975 | |
850b6b3b | 976 | stats->n_flows = ovs_flow_tbl_count(table); |
064af421 | 977 | |
7257b535 | 978 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
d6569377 BP |
979 | for_each_possible_cpu(i) { |
980 | const struct dp_stats_percpu *percpu_stats; | |
981 | struct dp_stats_percpu local_stats; | |
821cb9fa | 982 | unsigned int start; |
44e05eca | 983 | |
d6569377 | 984 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 985 | |
d6569377 | 986 | do { |
821cb9fa | 987 | start = u64_stats_fetch_begin_bh(&percpu_stats->sync); |
d6569377 | 988 | local_stats = *percpu_stats; |
821cb9fa | 989 | } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); |
064af421 | 990 | |
d6569377 BP |
991 | stats->n_hit += local_stats.n_hit; |
992 | stats->n_missed += local_stats.n_missed; | |
993 | stats->n_lost += local_stats.n_lost; | |
994 | } | |
995 | } | |
064af421 | 996 | |
df2c07f4 JP |
997 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
998 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
999 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1000 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 1001 | }; |
36956a7d | 1002 | |
37a1300c BP |
1003 | static struct genl_family dp_flow_genl_family = { |
1004 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1005 | .hdrsize = sizeof(struct ovs_header), |
1006 | .name = OVS_FLOW_FAMILY, | |
69685a88 | 1007 | .version = OVS_FLOW_VERSION, |
2a4999f3 PS |
1008 | .maxattr = OVS_FLOW_ATTR_MAX, |
1009 | SET_NETNSOK | |
37a1300c | 1010 | }; |
ed099e92 | 1011 | |
850b6b3b | 1012 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { |
df2c07f4 | 1013 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
1014 | }; |
1015 | ||
9b405f1a PS |
1016 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb); |
1017 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) | |
1018 | { | |
1019 | const struct nlattr *a; | |
1020 | struct nlattr *start; | |
1021 | int err = 0, rem; | |
1022 | ||
1023 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
1024 | if (!start) | |
1025 | return -EMSGSIZE; | |
1026 | ||
1027 | nla_for_each_nested(a, attr, rem) { | |
1028 | int type = nla_type(a); | |
1029 | struct nlattr *st_sample; | |
1030 | ||
1031 | switch (type) { | |
1032 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
1033 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, sizeof(u32), nla_data(a))) | |
1034 | return -EMSGSIZE; | |
1035 | break; | |
1036 | case OVS_SAMPLE_ATTR_ACTIONS: | |
1037 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
1038 | if (!st_sample) | |
1039 | return -EMSGSIZE; | |
1040 | err = actions_to_attr(nla_data(a), nla_len(a), skb); | |
1041 | if (err) | |
1042 | return err; | |
1043 | nla_nest_end(skb, st_sample); | |
1044 | break; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | nla_nest_end(skb, start); | |
1049 | return err; | |
1050 | } | |
1051 | ||
1052 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
1053 | { | |
1054 | const struct nlattr *ovs_key = nla_data(a); | |
1055 | int key_type = nla_type(ovs_key); | |
1056 | struct nlattr *start; | |
1057 | int err; | |
1058 | ||
1059 | switch (key_type) { | |
1060 | case OVS_KEY_ATTR_IPV4_TUNNEL: | |
1061 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); | |
1062 | if (!start) | |
1063 | return -EMSGSIZE; | |
1064 | ||
a1c564be AZ |
1065 | err = ipv4_tun_to_nlattr(skb, |
1066 | nla_data(ovs_key), nla_data(ovs_key)); | |
9b405f1a PS |
1067 | if (err) |
1068 | return err; | |
1069 | nla_nest_end(skb, start); | |
1070 | break; | |
1071 | default: | |
1072 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
1073 | return -EMSGSIZE; | |
1074 | break; | |
1075 | } | |
1076 | ||
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb) | |
1081 | { | |
1082 | const struct nlattr *a; | |
1083 | int rem, err; | |
1084 | ||
1085 | nla_for_each_attr(a, attr, len, rem) { | |
1086 | int type = nla_type(a); | |
1087 | ||
1088 | switch (type) { | |
1089 | case OVS_ACTION_ATTR_SET: | |
1090 | err = set_action_to_attr(a, skb); | |
1091 | if (err) | |
1092 | return err; | |
1093 | break; | |
1094 | ||
1095 | case OVS_ACTION_ATTR_SAMPLE: | |
1096 | err = sample_action_to_attr(a, skb); | |
1097 | if (err) | |
1098 | return err; | |
1099 | break; | |
1100 | default: | |
1101 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
1102 | return -EMSGSIZE; | |
1103 | break; | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | return 0; | |
1108 | } | |
1109 | ||
0afa2373 TG |
1110 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
1111 | { | |
1112 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
1113 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
a1c564be | 1114 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */ |
0afa2373 TG |
1115 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
1116 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
1117 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
1118 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
1119 | } | |
1120 | ||
cd2a59e9 | 1121 | /* Called with ovs_mutex. */ |
df2c07f4 | 1122 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
28aea917 | 1123 | struct sk_buff *skb, u32 portid, |
6455100f | 1124 | u32 seq, u32 flags, u8 cmd) |
d6569377 | 1125 | { |
37a1300c | 1126 | const int skb_orig_len = skb->len; |
d6569377 | 1127 | const struct sw_flow_actions *sf_acts; |
9b405f1a | 1128 | struct nlattr *start; |
df2c07f4 JP |
1129 | struct ovs_flow_stats stats; |
1130 | struct ovs_header *ovs_header; | |
d6569377 BP |
1131 | struct nlattr *nla; |
1132 | unsigned long used; | |
1133 | u8 tcp_flags; | |
1134 | int err; | |
064af421 | 1135 | |
cd2a59e9 | 1136 | sf_acts = ovsl_dereference(flow->sf_acts); |
064af421 | 1137 | |
28aea917 | 1138 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
df2c07f4 | 1139 | if (!ovs_header) |
37a1300c | 1140 | return -EMSGSIZE; |
d6569377 | 1141 | |
99769a40 | 1142 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 1143 | |
a1c564be | 1144 | /* Fill flow key. */ |
df2c07f4 | 1145 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
1146 | if (!nla) |
1147 | goto nla_put_failure; | |
a1c564be AZ |
1148 | |
1149 | err = ovs_flow_to_nlattrs(&flow->unmasked_key, | |
1150 | &flow->unmasked_key, skb); | |
d6569377 | 1151 | if (err) |
37a1300c | 1152 | goto error; |
d6569377 BP |
1153 | nla_nest_end(skb, nla); |
1154 | ||
a1c564be AZ |
1155 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); |
1156 | if (!nla) | |
1157 | goto nla_put_failure; | |
1158 | ||
1159 | err = ovs_flow_to_nlattrs(&flow->key, | |
1160 | &ovsl_dereference(flow->mask)->key, skb); | |
1161 | if (err) | |
1162 | goto error; | |
1163 | ||
1164 | nla_nest_end(skb, nla); | |
1165 | ||
d6569377 BP |
1166 | spin_lock_bh(&flow->lock); |
1167 | used = flow->used; | |
1168 | stats.n_packets = flow->packet_count; | |
1169 | stats.n_bytes = flow->byte_count; | |
1170 | tcp_flags = flow->tcp_flags; | |
1171 | spin_unlock_bh(&flow->lock); | |
1172 | ||
c3cc8c03 DM |
1173 | if (used && |
1174 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
1175 | goto nla_put_failure; | |
d6569377 | 1176 | |
c3cc8c03 DM |
1177 | if (stats.n_packets && |
1178 | nla_put(skb, OVS_FLOW_ATTR_STATS, | |
1179 | sizeof(struct ovs_flow_stats), &stats)) | |
1180 | goto nla_put_failure; | |
d6569377 | 1181 | |
c3cc8c03 DM |
1182 | if (tcp_flags && |
1183 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags)) | |
1184 | goto nla_put_failure; | |
d6569377 | 1185 | |
df2c07f4 | 1186 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
1187 | * this is the first flow to be dumped into 'skb'. This is unusual for |
1188 | * Netlink but individual action lists can be longer than | |
1189 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
1190 | * The userspace caller can always fetch the actions separately if it | |
1191 | * really wants them. (Most userspace callers in fact don't care.) | |
1192 | * | |
1193 | * This can only fail for dump operations because the skb is always | |
1194 | * properly sized for single flows. | |
1195 | */ | |
9b405f1a | 1196 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee PS |
1197 | if (start) { |
1198 | err = actions_to_attr(sf_acts->actions, sf_acts->actions_len, skb); | |
0a25b039 BP |
1199 | if (!err) |
1200 | nla_nest_end(skb, start); | |
1201 | else { | |
1202 | if (skb_orig_len) | |
1203 | goto error; | |
1204 | ||
1205 | nla_nest_cancel(skb, start); | |
1206 | } | |
7aac03bd JG |
1207 | } else if (skb_orig_len) |
1208 | goto nla_put_failure; | |
37a1300c | 1209 | |
df2c07f4 | 1210 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1211 | |
1212 | nla_put_failure: | |
1213 | err = -EMSGSIZE; | |
37a1300c | 1214 | error: |
df2c07f4 | 1215 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 1216 | return err; |
44e05eca BP |
1217 | } |
1218 | ||
df2c07f4 | 1219 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) |
44e05eca | 1220 | { |
37a1300c | 1221 | const struct sw_flow_actions *sf_acts; |
d6569377 | 1222 | |
cd2a59e9 | 1223 | sf_acts = ovsl_dereference(flow->sf_acts); |
d6569377 | 1224 | |
0afa2373 | 1225 | return genlmsg_new(ovs_flow_cmd_msg_size(sf_acts), GFP_KERNEL); |
37a1300c | 1226 | } |
8d5ebd83 | 1227 | |
6455100f PS |
1228 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, |
1229 | struct datapath *dp, | |
28aea917 | 1230 | u32 portid, u32 seq, u8 cmd) |
37a1300c BP |
1231 | { |
1232 | struct sk_buff *skb; | |
1233 | int retval; | |
d6569377 | 1234 | |
df2c07f4 | 1235 | skb = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1236 | if (!skb) |
1237 | return ERR_PTR(-ENOMEM); | |
d6569377 | 1238 | |
28aea917 | 1239 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, portid, seq, 0, cmd); |
37a1300c | 1240 | BUG_ON(retval < 0); |
d6569377 | 1241 | return skb; |
064af421 BP |
1242 | } |
1243 | ||
df2c07f4 | 1244 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1245 | { |
37a1300c | 1246 | struct nlattr **a = info->attrs; |
df2c07f4 | 1247 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1248 | struct sw_flow_key key; |
a1c564be AZ |
1249 | struct sw_flow *flow = NULL; |
1250 | struct sw_flow_mask mask; | |
37a1300c | 1251 | struct sk_buff *reply; |
9c52546b | 1252 | struct datapath *dp; |
3544358a | 1253 | struct flow_table *table; |
9b405f1a | 1254 | struct sw_flow_actions *acts = NULL; |
a1c564be | 1255 | struct sw_flow_match match; |
bc4a05c6 | 1256 | int error; |
064af421 | 1257 | |
37a1300c BP |
1258 | /* Extract key. */ |
1259 | error = -EINVAL; | |
df2c07f4 | 1260 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1261 | goto error; |
a1c564be AZ |
1262 | |
1263 | ovs_match_init(&match, &key, &mask); | |
1264 | error = ovs_match_from_nlattrs(&match, | |
1265 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); | |
37a1300c BP |
1266 | if (error) |
1267 | goto error; | |
064af421 | 1268 | |
37a1300c | 1269 | /* Validate actions. */ |
df2c07f4 | 1270 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
9b405f1a PS |
1271 | acts = ovs_flow_actions_alloc(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
1272 | error = PTR_ERR(acts); | |
1273 | if (IS_ERR(acts)) | |
37a1300c | 1274 | goto error; |
9b405f1a PS |
1275 | |
1276 | error = validate_and_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0, &acts); | |
1277 | if (error) | |
1278 | goto err_kfree; | |
df2c07f4 | 1279 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
1280 | error = -EINVAL; |
1281 | goto error; | |
1282 | } | |
1283 | ||
cd2a59e9 | 1284 | ovs_lock(); |
2a4999f3 | 1285 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
d6569377 | 1286 | error = -ENODEV; |
9c52546b | 1287 | if (!dp) |
cd2a59e9 | 1288 | goto err_unlock_ovs; |
704a1e09 | 1289 | |
cd2a59e9 | 1290 | table = ovsl_dereference(dp->table); |
a1c564be AZ |
1291 | |
1292 | /* Check if this is a duplicate flow */ | |
1293 | flow = ovs_flow_lookup(table, &key); | |
3544358a | 1294 | if (!flow) { |
a1c564be | 1295 | struct sw_flow_mask *mask_p; |
d6569377 BP |
1296 | /* Bail out if we're not allowed to create a new flow. */ |
1297 | error = -ENOENT; | |
df2c07f4 | 1298 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
cd2a59e9 | 1299 | goto err_unlock_ovs; |
d6569377 BP |
1300 | |
1301 | /* Expand table, if necessary, to make room. */ | |
850b6b3b | 1302 | if (ovs_flow_tbl_need_to_expand(table)) { |
3544358a PS |
1303 | struct flow_table *new_table; |
1304 | ||
850b6b3b | 1305 | new_table = ovs_flow_tbl_expand(table); |
3544358a PS |
1306 | if (!IS_ERR(new_table)) { |
1307 | rcu_assign_pointer(dp->table, new_table); | |
a1c564be | 1308 | ovs_flow_tbl_destroy(table, true); |
cd2a59e9 | 1309 | table = ovsl_dereference(dp->table); |
3544358a | 1310 | } |
d6569377 BP |
1311 | } |
1312 | ||
1313 | /* Allocate flow. */ | |
850b6b3b | 1314 | flow = ovs_flow_alloc(); |
d6569377 BP |
1315 | if (IS_ERR(flow)) { |
1316 | error = PTR_ERR(flow); | |
cd2a59e9 | 1317 | goto err_unlock_ovs; |
d6569377 | 1318 | } |
d6569377 BP |
1319 | clear_stats(flow); |
1320 | ||
a1c564be AZ |
1321 | /* Make sure mask is unique in the system */ |
1322 | mask_p = ovs_sw_flow_mask_find(table, &mask); | |
1323 | if (!mask_p) { | |
1324 | /* Allocate a new mask if none exsits. */ | |
1325 | mask_p = ovs_sw_flow_mask_alloc(); | |
1326 | if (!mask_p) | |
1327 | goto err_flow_free; | |
1328 | mask_p->key = mask.key; | |
1329 | mask_p->range = mask.range; | |
1330 | ovs_sw_flow_mask_insert(table, mask_p); | |
1331 | } | |
1332 | ||
1333 | ovs_sw_flow_mask_add_ref(mask_p); | |
1334 | rcu_assign_pointer(flow->mask, mask_p); | |
d6569377 BP |
1335 | rcu_assign_pointer(flow->sf_acts, acts); |
1336 | ||
d6569377 | 1337 | /* Put flow in bucket. */ |
a1c564be | 1338 | ovs_flow_insert(table, flow, &key, match.range.end); |
37a1300c | 1339 | |
28aea917 | 1340 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
a1c564be | 1341 | info->snd_seq, OVS_FLOW_CMD_NEW); |
d6569377 BP |
1342 | } else { |
1343 | /* We found a matching flow. */ | |
1344 | struct sw_flow_actions *old_acts; | |
1345 | ||
a1c564be AZ |
1346 | /* Make sure the it has the same unmasked key. */ |
1347 | if (!ovs_flow_cmp_unmasked_key(flow, &key, match.range.end)) { | |
1348 | error = -EINVAL; | |
1349 | goto err_unlock_ovs; | |
1350 | } | |
1351 | ||
d6569377 BP |
1352 | /* Bail out if we're not allowed to modify an existing flow. |
1353 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1354 | * because Generic Netlink treats the latter as a dump | |
1355 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1356 | * gets fixed. | |
1357 | */ | |
1358 | error = -EEXIST; | |
df2c07f4 | 1359 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c | 1360 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
cd2a59e9 | 1361 | goto err_unlock_ovs; |
d6569377 BP |
1362 | |
1363 | /* Update actions. */ | |
cd2a59e9 | 1364 | old_acts = ovsl_dereference(flow->sf_acts); |
9b405f1a PS |
1365 | rcu_assign_pointer(flow->sf_acts, acts); |
1366 | ovs_flow_deferred_free_acts(old_acts); | |
d6569377 | 1367 | |
28aea917 | 1368 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f | 1369 | info->snd_seq, OVS_FLOW_CMD_NEW); |
d6569377 BP |
1370 | |
1371 | /* Clear stats. */ | |
df2c07f4 | 1372 | if (a[OVS_FLOW_ATTR_CLEAR]) { |
d6569377 BP |
1373 | spin_lock_bh(&flow->lock); |
1374 | clear_stats(flow); | |
1375 | spin_unlock_bh(&flow->lock); | |
1376 | } | |
9c52546b | 1377 | } |
cd2a59e9 | 1378 | ovs_unlock(); |
37a1300c BP |
1379 | |
1380 | if (!IS_ERR(reply)) | |
e297c6b7 | 1381 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
37a1300c | 1382 | else |
2a4999f3 PS |
1383 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
1384 | ovs_dp_flow_multicast_group.id, PTR_ERR(reply)); | |
d6569377 | 1385 | return 0; |
704a1e09 | 1386 | |
a1c564be AZ |
1387 | err_flow_free: |
1388 | ovs_flow_free(flow, false); | |
cd2a59e9 PS |
1389 | err_unlock_ovs: |
1390 | ovs_unlock(); | |
9b405f1a | 1391 | err_kfree: |
ba400435 | 1392 | kfree(acts); |
37a1300c | 1393 | error: |
9c52546b | 1394 | return error; |
704a1e09 BP |
1395 | } |
1396 | ||
df2c07f4 | 1397 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1398 | { |
37a1300c | 1399 | struct nlattr **a = info->attrs; |
df2c07f4 | 1400 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1401 | struct sw_flow_key key; |
37a1300c | 1402 | struct sk_buff *reply; |
704a1e09 | 1403 | struct sw_flow *flow; |
9c52546b | 1404 | struct datapath *dp; |
3544358a | 1405 | struct flow_table *table; |
a1c564be | 1406 | struct sw_flow_match match; |
9c52546b | 1407 | int err; |
704a1e09 | 1408 | |
df2c07f4 | 1409 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1410 | return -EINVAL; |
a1c564be AZ |
1411 | |
1412 | ovs_match_init(&match, &key, NULL); | |
1413 | err = ovs_match_from_nlattrs(&match, a[OVS_FLOW_ATTR_KEY], NULL); | |
37a1300c BP |
1414 | if (err) |
1415 | return err; | |
704a1e09 | 1416 | |
cd2a59e9 | 1417 | ovs_lock(); |
2a4999f3 | 1418 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1419 | if (!dp) { |
1420 | err = -ENODEV; | |
1421 | goto unlock; | |
1422 | } | |
704a1e09 | 1423 | |
cd2a59e9 | 1424 | table = ovsl_dereference(dp->table); |
a1c564be | 1425 | flow = ovs_flow_lookup_unmasked_key(table, &match); |
cd2a59e9 PS |
1426 | if (!flow) { |
1427 | err = -ENOENT; | |
1428 | goto unlock; | |
1429 | } | |
d6569377 | 1430 | |
28aea917 | 1431 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, |
6455100f | 1432 | info->snd_seq, OVS_FLOW_CMD_NEW); |
cd2a59e9 PS |
1433 | if (IS_ERR(reply)) { |
1434 | err = PTR_ERR(reply); | |
1435 | goto unlock; | |
1436 | } | |
36956a7d | 1437 | |
cd2a59e9 | 1438 | ovs_unlock(); |
37a1300c | 1439 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1440 | unlock: |
1441 | ovs_unlock(); | |
1442 | return err; | |
d6569377 | 1443 | } |
9c52546b | 1444 | |
df2c07f4 | 1445 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1446 | { |
37a1300c | 1447 | struct nlattr **a = info->attrs; |
df2c07f4 | 1448 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1449 | struct sw_flow_key key; |
37a1300c | 1450 | struct sk_buff *reply; |
d6569377 | 1451 | struct sw_flow *flow; |
d6569377 | 1452 | struct datapath *dp; |
3544358a | 1453 | struct flow_table *table; |
a1c564be | 1454 | struct sw_flow_match match; |
d6569377 | 1455 | int err; |
36956a7d | 1456 | |
cd2a59e9 | 1457 | ovs_lock(); |
2a4999f3 | 1458 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1459 | if (!dp) { |
1460 | err = -ENODEV; | |
1461 | goto unlock; | |
1462 | } | |
2a4999f3 | 1463 | |
cd2a59e9 PS |
1464 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1465 | err = flush_flows(dp); | |
1466 | goto unlock; | |
1467 | } | |
a1c564be AZ |
1468 | |
1469 | ovs_match_init(&match, &key, NULL); | |
1470 | err = ovs_match_from_nlattrs(&match, a[OVS_FLOW_ATTR_KEY], NULL); | |
37a1300c | 1471 | if (err) |
cd2a59e9 | 1472 | goto unlock; |
d6569377 | 1473 | |
cd2a59e9 | 1474 | table = ovsl_dereference(dp->table); |
a1c564be | 1475 | flow = ovs_flow_lookup_unmasked_key(table, &match); |
cd2a59e9 PS |
1476 | if (!flow) { |
1477 | err = -ENOENT; | |
1478 | goto unlock; | |
1479 | } | |
d6569377 | 1480 | |
df2c07f4 | 1481 | reply = ovs_flow_cmd_alloc_info(flow); |
cd2a59e9 PS |
1482 | if (!reply) { |
1483 | err = -ENOMEM; | |
1484 | goto unlock; | |
1485 | } | |
37a1300c | 1486 | |
a1c564be | 1487 | ovs_flow_remove(table, flow); |
37a1300c | 1488 | |
28aea917 | 1489 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid, |
df2c07f4 | 1490 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); |
37a1300c BP |
1491 | BUG_ON(err < 0); |
1492 | ||
a1c564be | 1493 | ovs_flow_free(flow, true); |
cd2a59e9 | 1494 | ovs_unlock(); |
37a1300c | 1495 | |
e297c6b7 | 1496 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
37a1300c | 1497 | return 0; |
cd2a59e9 PS |
1498 | unlock: |
1499 | ovs_unlock(); | |
1500 | return err; | |
37a1300c BP |
1501 | } |
1502 | ||
df2c07f4 | 1503 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1504 | { |
df2c07f4 | 1505 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
37a1300c | 1506 | struct datapath *dp; |
20d035b2 | 1507 | struct flow_table *table; |
37a1300c | 1508 | |
cd2a59e9 | 1509 | ovs_lock(); |
2a4999f3 | 1510 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1511 | if (!dp) { |
1512 | ovs_unlock(); | |
37a1300c | 1513 | return -ENODEV; |
cd2a59e9 | 1514 | } |
37a1300c | 1515 | |
cd2a59e9 | 1516 | table = ovsl_dereference(dp->table); |
20d035b2 | 1517 | |
37a1300c | 1518 | for (;;) { |
37a1300c BP |
1519 | struct sw_flow *flow; |
1520 | u32 bucket, obj; | |
1521 | ||
1522 | bucket = cb->args[0]; | |
1523 | obj = cb->args[1]; | |
a1c564be | 1524 | flow = ovs_flow_dump_next(table, &bucket, &obj); |
3544358a | 1525 | if (!flow) |
37a1300c BP |
1526 | break; |
1527 | ||
6455100f | 1528 | if (ovs_flow_cmd_fill_info(flow, dp, skb, |
28aea917 | 1529 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1530 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1531 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1532 | break; |
1533 | ||
1534 | cb->args[0] = bucket; | |
1535 | cb->args[1] = obj; | |
1536 | } | |
cd2a59e9 | 1537 | ovs_unlock(); |
37a1300c | 1538 | return skb->len; |
704a1e09 BP |
1539 | } |
1540 | ||
37a1300c | 1541 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1542 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1543 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1544 | .policy = flow_policy, | |
df2c07f4 | 1545 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1546 | }, |
df2c07f4 | 1547 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1548 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1549 | .policy = flow_policy, | |
df2c07f4 | 1550 | .doit = ovs_flow_cmd_del |
37a1300c | 1551 | }, |
df2c07f4 | 1552 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1553 | .flags = 0, /* OK for unprivileged users. */ |
1554 | .policy = flow_policy, | |
df2c07f4 JP |
1555 | .doit = ovs_flow_cmd_get, |
1556 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1557 | }, |
df2c07f4 | 1558 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1559 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1560 | .policy = flow_policy, | |
df2c07f4 | 1561 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1562 | }, |
1563 | }; | |
1564 | ||
df2c07f4 | 1565 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
aaff4b55 | 1566 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1567 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
aaff4b55 | 1568 | #endif |
b063d9f0 | 1569 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
d6569377 BP |
1570 | }; |
1571 | ||
aaff4b55 BP |
1572 | static struct genl_family dp_datapath_genl_family = { |
1573 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1574 | .hdrsize = sizeof(struct ovs_header), |
1575 | .name = OVS_DATAPATH_FAMILY, | |
69685a88 | 1576 | .version = OVS_DATAPATH_VERSION, |
2a4999f3 PS |
1577 | .maxattr = OVS_DP_ATTR_MAX, |
1578 | SET_NETNSOK | |
aaff4b55 BP |
1579 | }; |
1580 | ||
850b6b3b | 1581 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
df2c07f4 | 1582 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1583 | }; |
1584 | ||
0afa2373 TG |
1585 | static size_t ovs_dp_cmd_msg_size(void) |
1586 | { | |
1587 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1588 | ||
1589 | msgsize += nla_total_size(IFNAMSIZ); | |
1590 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1591 | ||
1592 | return msgsize; | |
1593 | } | |
1594 | ||
df2c07f4 | 1595 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1596 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1597 | { |
df2c07f4 | 1598 | struct ovs_header *ovs_header; |
e926dfe3 | 1599 | struct ovs_dp_stats dp_stats; |
064af421 BP |
1600 | int err; |
1601 | ||
28aea917 | 1602 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1603 | flags, cmd); |
df2c07f4 | 1604 | if (!ovs_header) |
aaff4b55 | 1605 | goto error; |
064af421 | 1606 | |
b063d9f0 | 1607 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1608 | |
d6569377 | 1609 | rcu_read_lock(); |
850b6b3b | 1610 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
d6569377 | 1611 | rcu_read_unlock(); |
064af421 | 1612 | if (err) |
d6569377 | 1613 | goto nla_put_failure; |
064af421 | 1614 | |
e926dfe3 | 1615 | get_dp_stats(dp, &dp_stats); |
c3cc8c03 DM |
1616 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats)) |
1617 | goto nla_put_failure; | |
d6569377 | 1618 | |
df2c07f4 | 1619 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1620 | |
1621 | nla_put_failure: | |
df2c07f4 | 1622 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1623 | error: |
1624 | return -EMSGSIZE; | |
d6569377 BP |
1625 | } |
1626 | ||
28aea917 | 1627 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 portid, |
aaff4b55 | 1628 | u32 seq, u8 cmd) |
d6569377 | 1629 | { |
d6569377 | 1630 | struct sk_buff *skb; |
aaff4b55 | 1631 | int retval; |
d6569377 | 1632 | |
0afa2373 | 1633 | skb = genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
064af421 | 1634 | if (!skb) |
d6569377 | 1635 | return ERR_PTR(-ENOMEM); |
659586ef | 1636 | |
28aea917 | 1637 | retval = ovs_dp_cmd_fill_info(dp, skb, portid, seq, 0, cmd); |
aaff4b55 BP |
1638 | if (retval < 0) { |
1639 | kfree_skb(skb); | |
1640 | return ERR_PTR(retval); | |
1641 | } | |
1642 | return skb; | |
1643 | } | |
9dca7bd5 | 1644 | |
df2c07f4 | 1645 | static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
aaff4b55 | 1646 | { |
df2c07f4 | 1647 | return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1); |
d6569377 BP |
1648 | } |
1649 | ||
cd2a59e9 | 1650 | /* Called with ovs_mutex. */ |
2a4999f3 PS |
1651 | static struct datapath *lookup_datapath(struct net *net, |
1652 | struct ovs_header *ovs_header, | |
6455100f | 1653 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1654 | { |
254f2dc8 BP |
1655 | struct datapath *dp; |
1656 | ||
df2c07f4 | 1657 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1658 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1659 | else { |
d6569377 | 1660 | struct vport *vport; |
d6569377 | 1661 | |
057dd6d2 | 1662 | rcu_read_lock(); |
2a4999f3 | 1663 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1664 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
057dd6d2 | 1665 | rcu_read_unlock(); |
d6569377 | 1666 | } |
254f2dc8 | 1667 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1668 | } |
1669 | ||
df2c07f4 | 1670 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1671 | { |
aaff4b55 | 1672 | struct nlattr **a = info->attrs; |
d6569377 | 1673 | struct vport_parms parms; |
aaff4b55 | 1674 | struct sk_buff *reply; |
d6569377 BP |
1675 | struct datapath *dp; |
1676 | struct vport *vport; | |
2a4999f3 | 1677 | struct ovs_net *ovs_net; |
95b1d73a | 1678 | int err, i; |
d6569377 | 1679 | |
d6569377 | 1680 | err = -EINVAL; |
ea36840f | 1681 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1682 | goto err; |
1683 | ||
df2c07f4 | 1684 | err = ovs_dp_cmd_validate(a); |
aaff4b55 BP |
1685 | if (err) |
1686 | goto err; | |
d6569377 | 1687 | |
cd2a59e9 | 1688 | ovs_lock(); |
d6569377 | 1689 | |
d6569377 BP |
1690 | err = -ENOMEM; |
1691 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1692 | if (dp == NULL) | |
cd2a59e9 | 1693 | goto err_unlock_ovs; |
2a4999f3 | 1694 | |
0ceaa66c JG |
1695 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1696 | ||
d6569377 BP |
1697 | /* Allocate table. */ |
1698 | err = -ENOMEM; | |
850b6b3b | 1699 | rcu_assign_pointer(dp->table, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS)); |
d6569377 BP |
1700 | if (!dp->table) |
1701 | goto err_free_dp; | |
1702 | ||
99769a40 JG |
1703 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); |
1704 | if (!dp->stats_percpu) { | |
1705 | err = -ENOMEM; | |
1706 | goto err_destroy_table; | |
1707 | } | |
1708 | ||
95b1d73a PS |
1709 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1710 | GFP_KERNEL); | |
1711 | if (!dp->ports) { | |
1712 | err = -ENOMEM; | |
1713 | goto err_destroy_percpu; | |
1714 | } | |
1715 | ||
1716 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1717 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1718 | ||
d6569377 | 1719 | /* Set up our datapath device. */ |
df2c07f4 JP |
1720 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1721 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1722 | parms.options = NULL; |
1723 | parms.dp = dp; | |
df2c07f4 | 1724 | parms.port_no = OVSP_LOCAL; |
28aea917 | 1725 | parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
b063d9f0 | 1726 | |
d6569377 BP |
1727 | vport = new_vport(&parms); |
1728 | if (IS_ERR(vport)) { | |
1729 | err = PTR_ERR(vport); | |
1730 | if (err == -EBUSY) | |
1731 | err = -EEXIST; | |
1732 | ||
95b1d73a | 1733 | goto err_destroy_ports_array; |
d6569377 | 1734 | } |
d6569377 | 1735 | |
28aea917 | 1736 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1737 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1738 | err = PTR_ERR(reply); |
1739 | if (IS_ERR(reply)) | |
1740 | goto err_destroy_local_port; | |
1741 | ||
2a4999f3 PS |
1742 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
1743 | list_add_tail(&dp->list_node, &ovs_net->dps); | |
d6569377 | 1744 | |
cd2a59e9 | 1745 | ovs_unlock(); |
d6569377 | 1746 | |
e297c6b7 | 1747 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
d6569377 BP |
1748 | return 0; |
1749 | ||
1750 | err_destroy_local_port: | |
cd2a59e9 | 1751 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
95b1d73a PS |
1752 | err_destroy_ports_array: |
1753 | kfree(dp->ports); | |
99769a40 JG |
1754 | err_destroy_percpu: |
1755 | free_percpu(dp->stats_percpu); | |
d6569377 | 1756 | err_destroy_table: |
a1c564be | 1757 | ovs_flow_tbl_destroy(ovsl_dereference(dp->table), false); |
d6569377 | 1758 | err_free_dp: |
0ceaa66c | 1759 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1760 | kfree(dp); |
cd2a59e9 PS |
1761 | err_unlock_ovs: |
1762 | ovs_unlock(); | |
d6569377 | 1763 | err: |
064af421 BP |
1764 | return err; |
1765 | } | |
1766 | ||
cd2a59e9 | 1767 | /* Called with ovs_mutex. */ |
2a4999f3 | 1768 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1769 | { |
95b1d73a | 1770 | int i; |
44e05eca | 1771 | |
95b1d73a PS |
1772 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1773 | struct vport *vport; | |
f8dfbcb7 | 1774 | struct hlist_node *n; |
95b1d73a | 1775 | |
f8dfbcb7 | 1776 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1777 | if (vport->port_no != OVSP_LOCAL) |
1778 | ovs_dp_detach_port(vport); | |
1779 | } | |
ed099e92 | 1780 | |
254f2dc8 | 1781 | list_del(&dp->list_node); |
ed099e92 | 1782 | |
cd2a59e9 PS |
1783 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
1784 | * all port in datapath are destroyed first before freeing datapath. | |
1785 | */ | |
1786 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); | |
99620d2c | 1787 | |
ed099e92 | 1788 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1789 | } |
1790 | ||
1791 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1792 | { | |
1793 | struct sk_buff *reply; | |
1794 | struct datapath *dp; | |
1795 | int err; | |
1796 | ||
1797 | err = ovs_dp_cmd_validate(info->attrs); | |
1798 | if (err) | |
1799 | return err; | |
1800 | ||
cd2a59e9 | 1801 | ovs_lock(); |
2a4999f3 PS |
1802 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1803 | err = PTR_ERR(dp); | |
1804 | if (IS_ERR(dp)) | |
cd2a59e9 | 1805 | goto unlock; |
2a4999f3 | 1806 | |
28aea917 | 1807 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
2a4999f3 PS |
1808 | info->snd_seq, OVS_DP_CMD_DEL); |
1809 | err = PTR_ERR(reply); | |
1810 | if (IS_ERR(reply)) | |
cd2a59e9 | 1811 | goto unlock; |
2a4999f3 PS |
1812 | |
1813 | __dp_destroy(dp); | |
cd2a59e9 | 1814 | ovs_unlock(); |
ed099e92 | 1815 | |
e297c6b7 | 1816 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
99620d2c JG |
1817 | |
1818 | return 0; | |
cd2a59e9 PS |
1819 | unlock: |
1820 | ovs_unlock(); | |
1821 | return err; | |
44e05eca BP |
1822 | } |
1823 | ||
df2c07f4 | 1824 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1825 | { |
aaff4b55 | 1826 | struct sk_buff *reply; |
d6569377 | 1827 | struct datapath *dp; |
d6569377 | 1828 | int err; |
064af421 | 1829 | |
df2c07f4 | 1830 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1831 | if (err) |
1832 | return err; | |
38c6ecbc | 1833 | |
cd2a59e9 | 1834 | ovs_lock(); |
2a4999f3 | 1835 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1836 | err = PTR_ERR(dp); |
d6569377 | 1837 | if (IS_ERR(dp)) |
cd2a59e9 | 1838 | goto unlock; |
38c6ecbc | 1839 | |
28aea917 | 1840 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1841 | info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1842 | if (IS_ERR(reply)) { |
1843 | err = PTR_ERR(reply); | |
2a4999f3 | 1844 | netlink_set_err(GENL_SOCK(sock_net(skb->sk)), 0, |
850b6b3b | 1845 | ovs_dp_datapath_multicast_group.id, err); |
cd2a59e9 PS |
1846 | err = 0; |
1847 | goto unlock; | |
aaff4b55 BP |
1848 | } |
1849 | ||
cd2a59e9 | 1850 | ovs_unlock(); |
e297c6b7 | 1851 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
850b6b3b | 1852 | |
aaff4b55 | 1853 | return 0; |
cd2a59e9 PS |
1854 | unlock: |
1855 | ovs_unlock(); | |
1856 | return err; | |
064af421 BP |
1857 | } |
1858 | ||
df2c07f4 | 1859 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1860 | { |
aaff4b55 | 1861 | struct sk_buff *reply; |
d6569377 | 1862 | struct datapath *dp; |
d6569377 | 1863 | int err; |
1dcf111b | 1864 | |
df2c07f4 | 1865 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1866 | if (err) |
1867 | return err; | |
1dcf111b | 1868 | |
cd2a59e9 | 1869 | ovs_lock(); |
2a4999f3 | 1870 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1871 | if (IS_ERR(dp)) { |
1872 | err = PTR_ERR(dp); | |
1873 | goto unlock; | |
1874 | } | |
1dcf111b | 1875 | |
28aea917 | 1876 | reply = ovs_dp_cmd_build_info(dp, info->snd_portid, |
6455100f | 1877 | info->snd_seq, OVS_DP_CMD_NEW); |
cd2a59e9 PS |
1878 | if (IS_ERR(reply)) { |
1879 | err = PTR_ERR(reply); | |
1880 | goto unlock; | |
1881 | } | |
aaff4b55 | 1882 | |
cd2a59e9 | 1883 | ovs_unlock(); |
aaff4b55 | 1884 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1885 | |
1886 | unlock: | |
1887 | ovs_unlock(); | |
1888 | return err; | |
1dcf111b JP |
1889 | } |
1890 | ||
df2c07f4 | 1891 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1892 | { |
2a4999f3 | 1893 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1894 | struct datapath *dp; |
1895 | int skip = cb->args[0]; | |
1896 | int i = 0; | |
a7786963 | 1897 | |
cd2a59e9 | 1898 | ovs_lock(); |
2a4999f3 | 1899 | list_for_each_entry(dp, &ovs_net->dps, list_node) { |
a2bab2f0 | 1900 | if (i >= skip && |
28aea917 | 1901 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1902 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1903 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1904 | break; |
254f2dc8 | 1905 | i++; |
a7786963 | 1906 | } |
cd2a59e9 | 1907 | ovs_unlock(); |
aaff4b55 | 1908 | |
254f2dc8 BP |
1909 | cb->args[0] = i; |
1910 | ||
aaff4b55 | 1911 | return skb->len; |
c19e6535 BP |
1912 | } |
1913 | ||
aaff4b55 | 1914 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1915 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1916 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1917 | .policy = datapath_policy, | |
df2c07f4 | 1918 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1919 | }, |
df2c07f4 | 1920 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1921 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1922 | .policy = datapath_policy, | |
df2c07f4 | 1923 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1924 | }, |
df2c07f4 | 1925 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1926 | .flags = 0, /* OK for unprivileged users. */ |
1927 | .policy = datapath_policy, | |
df2c07f4 JP |
1928 | .doit = ovs_dp_cmd_get, |
1929 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1930 | }, |
df2c07f4 | 1931 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1932 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1933 | .policy = datapath_policy, | |
df2c07f4 | 1934 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1935 | }, |
1936 | }; | |
1937 | ||
df2c07f4 | 1938 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
f0fef760 | 1939 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1940 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1941 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
f0fef760 | 1942 | #else |
f613a0d7 | 1943 | [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) }, |
f0fef760 | 1944 | #endif |
d48c88ec JG |
1945 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1946 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1947 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1948 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1949 | }; |
1950 | ||
f0fef760 BP |
1951 | static struct genl_family dp_vport_genl_family = { |
1952 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1953 | .hdrsize = sizeof(struct ovs_header), |
1954 | .name = OVS_VPORT_FAMILY, | |
69685a88 | 1955 | .version = OVS_VPORT_VERSION, |
2a4999f3 PS |
1956 | .maxattr = OVS_VPORT_ATTR_MAX, |
1957 | SET_NETNSOK | |
f0fef760 BP |
1958 | }; |
1959 | ||
850b6b3b | 1960 | struct genl_multicast_group ovs_dp_vport_multicast_group = { |
df2c07f4 | 1961 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1962 | }; |
1963 | ||
cd2a59e9 | 1964 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1965 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1966 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1967 | { |
df2c07f4 | 1968 | struct ovs_header *ovs_header; |
e926dfe3 | 1969 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1970 | int err; |
1971 | ||
28aea917 | 1972 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1973 | flags, cmd); |
df2c07f4 | 1974 | if (!ovs_header) |
f0fef760 | 1975 | return -EMSGSIZE; |
c19e6535 | 1976 | |
99769a40 | 1977 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1978 | |
c3cc8c03 DM |
1979 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1980 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
1981 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || | |
28aea917 | 1982 | nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid)) |
c3cc8c03 | 1983 | goto nla_put_failure; |
c19e6535 | 1984 | |
850b6b3b | 1985 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1986 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1987 | &vport_stats)) | |
1988 | goto nla_put_failure; | |
c19e6535 | 1989 | |
850b6b3b | 1990 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1991 | if (err == -EMSGSIZE) |
1992 | goto error; | |
c19e6535 | 1993 | |
df2c07f4 | 1994 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1995 | |
1996 | nla_put_failure: | |
1997 | err = -EMSGSIZE; | |
f0fef760 | 1998 | error: |
df2c07f4 | 1999 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 2000 | return err; |
064af421 BP |
2001 | } |
2002 | ||
cd2a59e9 | 2003 | /* Called with ovs_mutex or RCU read lock. */ |
28aea917 | 2004 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 2005 | u32 seq, u8 cmd) |
064af421 | 2006 | { |
c19e6535 | 2007 | struct sk_buff *skb; |
f0fef760 | 2008 | int retval; |
c19e6535 | 2009 | |
f0fef760 | 2010 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
2011 | if (!skb) |
2012 | return ERR_PTR(-ENOMEM); | |
2013 | ||
28aea917 | 2014 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
2015 | BUG_ON(retval < 0); |
2016 | ||
c19e6535 | 2017 | return skb; |
f0fef760 | 2018 | } |
c19e6535 | 2019 | |
df2c07f4 | 2020 | static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
f0fef760 | 2021 | { |
df2c07f4 | 2022 | return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1); |
c19e6535 | 2023 | } |
51d4d598 | 2024 | |
cd2a59e9 | 2025 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 PS |
2026 | static struct vport *lookup_vport(struct net *net, |
2027 | struct ovs_header *ovs_header, | |
df2c07f4 | 2028 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
2029 | { |
2030 | struct datapath *dp; | |
2031 | struct vport *vport; | |
2032 | ||
df2c07f4 | 2033 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 2034 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 2035 | if (!vport) |
c19e6535 | 2036 | return ERR_PTR(-ENODEV); |
24ce832d BP |
2037 | if (ovs_header->dp_ifindex && |
2038 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
2039 | return ERR_PTR(-ENODEV); | |
c19e6535 | 2040 | return vport; |
df2c07f4 JP |
2041 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
2042 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
2043 | |
2044 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 2045 | return ERR_PTR(-EFBIG); |
c19e6535 | 2046 | |
2a4999f3 | 2047 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
2048 | if (!dp) |
2049 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 2050 | |
cd2a59e9 | 2051 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 2052 | if (!vport) |
17535c57 | 2053 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
2054 | return vport; |
2055 | } else | |
2056 | return ERR_PTR(-EINVAL); | |
064af421 BP |
2057 | } |
2058 | ||
df2c07f4 | 2059 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 2060 | { |
f0fef760 | 2061 | struct nlattr **a = info->attrs; |
df2c07f4 | 2062 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 2063 | struct vport_parms parms; |
ed099e92 | 2064 | struct sk_buff *reply; |
c19e6535 | 2065 | struct vport *vport; |
c19e6535 | 2066 | struct datapath *dp; |
b0ec0f27 | 2067 | u32 port_no; |
c19e6535 | 2068 | int err; |
b0ec0f27 | 2069 | |
c19e6535 | 2070 | err = -EINVAL; |
ea36840f BP |
2071 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
2072 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
f0fef760 BP |
2073 | goto exit; |
2074 | ||
df2c07f4 | 2075 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
2076 | if (err) |
2077 | goto exit; | |
51d4d598 | 2078 | |
cd2a59e9 | 2079 | ovs_lock(); |
2a4999f3 | 2080 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
2081 | err = -ENODEV; |
2082 | if (!dp) | |
ed099e92 | 2083 | goto exit_unlock; |
c19e6535 | 2084 | |
df2c07f4 JP |
2085 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
2086 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
2087 | |
2088 | err = -EFBIG; | |
2089 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 2090 | goto exit_unlock; |
c19e6535 | 2091 | |
cd2a59e9 | 2092 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2093 | err = -EBUSY; |
2094 | if (vport) | |
ed099e92 | 2095 | goto exit_unlock; |
c19e6535 BP |
2096 | } else { |
2097 | for (port_no = 1; ; port_no++) { | |
2098 | if (port_no >= DP_MAX_PORTS) { | |
2099 | err = -EFBIG; | |
ed099e92 | 2100 | goto exit_unlock; |
c19e6535 | 2101 | } |
cd2a59e9 | 2102 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2103 | if (!vport) |
2104 | break; | |
51d4d598 | 2105 | } |
064af421 | 2106 | } |
b0ec0f27 | 2107 | |
df2c07f4 JP |
2108 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
2109 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2110 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
2111 | parms.dp = dp; |
2112 | parms.port_no = port_no; | |
28aea917 | 2113 | parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 BP |
2114 | |
2115 | vport = new_vport(&parms); | |
2116 | err = PTR_ERR(vport); | |
2117 | if (IS_ERR(vport)) | |
ed099e92 | 2118 | goto exit_unlock; |
c19e6535 | 2119 | |
faef6d2d | 2120 | err = 0; |
1fc7083d JG |
2121 | if (a[OVS_VPORT_ATTR_STATS]) |
2122 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
2123 | ||
2124 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, | |
2125 | OVS_VPORT_CMD_NEW); | |
2126 | if (IS_ERR(reply)) { | |
2127 | err = PTR_ERR(reply); | |
850b6b3b | 2128 | ovs_dp_detach_port(vport); |
ed099e92 | 2129 | goto exit_unlock; |
c19e6535 | 2130 | } |
e297c6b7 TG |
2131 | |
2132 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); | |
c19e6535 | 2133 | |
ed099e92 | 2134 | exit_unlock: |
cd2a59e9 | 2135 | ovs_unlock(); |
c19e6535 BP |
2136 | exit: |
2137 | return err; | |
44e05eca BP |
2138 | } |
2139 | ||
df2c07f4 | 2140 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 2141 | { |
f0fef760 BP |
2142 | struct nlattr **a = info->attrs; |
2143 | struct sk_buff *reply; | |
c19e6535 | 2144 | struct vport *vport; |
c19e6535 | 2145 | int err; |
44e05eca | 2146 | |
df2c07f4 | 2147 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 2148 | if (err) |
c19e6535 BP |
2149 | goto exit; |
2150 | ||
cd2a59e9 | 2151 | ovs_lock(); |
2a4999f3 | 2152 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
2153 | err = PTR_ERR(vport); |
2154 | if (IS_ERR(vport)) | |
f0fef760 | 2155 | goto exit_unlock; |
44e05eca | 2156 | |
6455100f | 2157 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 2158 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 2159 | err = -EINVAL; |
17ec1d04 JG |
2160 | goto exit_unlock; |
2161 | } | |
6455100f | 2162 | |
c25ea534 JG |
2163 | reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
2164 | if (!reply) { | |
2165 | err = -ENOMEM; | |
2166 | goto exit_unlock; | |
2167 | } | |
2168 | ||
17ec1d04 | 2169 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 2170 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 JG |
2171 | if (err) |
2172 | goto exit_free; | |
2173 | } | |
1fc7083d JG |
2174 | |
2175 | if (a[OVS_VPORT_ATTR_STATS]) | |
2176 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
2177 | ||
2178 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) | |
28aea917 | 2179 | vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 | 2180 | |
c25ea534 JG |
2181 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2182 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2183 | BUG_ON(err < 0); | |
f0fef760 | 2184 | |
cd2a59e9 | 2185 | ovs_unlock(); |
8680ae4d | 2186 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
c25ea534 JG |
2187 | return 0; |
2188 | ||
2189 | exit_free: | |
2190 | kfree_skb(reply); | |
f0fef760 | 2191 | exit_unlock: |
cd2a59e9 | 2192 | ovs_unlock(); |
c19e6535 BP |
2193 | exit: |
2194 | return err; | |
064af421 BP |
2195 | } |
2196 | ||
df2c07f4 | 2197 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2198 | { |
f0fef760 BP |
2199 | struct nlattr **a = info->attrs; |
2200 | struct sk_buff *reply; | |
c19e6535 | 2201 | struct vport *vport; |
c19e6535 BP |
2202 | int err; |
2203 | ||
df2c07f4 | 2204 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 2205 | if (err) |
c19e6535 BP |
2206 | goto exit; |
2207 | ||
cd2a59e9 | 2208 | ovs_lock(); |
2a4999f3 | 2209 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 2210 | err = PTR_ERR(vport); |
f0fef760 BP |
2211 | if (IS_ERR(vport)) |
2212 | goto exit_unlock; | |
c19e6535 | 2213 | |
df2c07f4 | 2214 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
2215 | err = -EINVAL; |
2216 | goto exit_unlock; | |
2217 | } | |
2218 | ||
28aea917 IY |
2219 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2220 | info->snd_seq, OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
2221 | err = PTR_ERR(reply); |
2222 | if (IS_ERR(reply)) | |
2223 | goto exit_unlock; | |
2224 | ||
b57d5819 | 2225 | err = 0; |
850b6b3b | 2226 | ovs_dp_detach_port(vport); |
f0fef760 | 2227 | |
e297c6b7 | 2228 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
f0fef760 BP |
2229 | |
2230 | exit_unlock: | |
cd2a59e9 | 2231 | ovs_unlock(); |
c19e6535 BP |
2232 | exit: |
2233 | return err; | |
7c40efc9 BP |
2234 | } |
2235 | ||
df2c07f4 | 2236 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2237 | { |
f0fef760 | 2238 | struct nlattr **a = info->attrs; |
df2c07f4 | 2239 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 2240 | struct sk_buff *reply; |
c19e6535 | 2241 | struct vport *vport; |
c19e6535 BP |
2242 | int err; |
2243 | ||
df2c07f4 | 2244 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
2245 | if (err) |
2246 | goto exit; | |
c19e6535 | 2247 | |
ed099e92 | 2248 | rcu_read_lock(); |
2a4999f3 | 2249 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2250 | err = PTR_ERR(vport); |
2251 | if (IS_ERR(vport)) | |
f0fef760 | 2252 | goto exit_unlock; |
c19e6535 | 2253 | |
28aea917 IY |
2254 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
2255 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
2256 | err = PTR_ERR(reply); |
2257 | if (IS_ERR(reply)) | |
f0fef760 | 2258 | goto exit_unlock; |
ed099e92 | 2259 | |
df2fa9b5 JG |
2260 | rcu_read_unlock(); |
2261 | ||
2262 | return genlmsg_reply(reply, info); | |
ed099e92 | 2263 | |
f0fef760 | 2264 | exit_unlock: |
ed099e92 | 2265 | rcu_read_unlock(); |
f0fef760 | 2266 | exit: |
c19e6535 BP |
2267 | return err; |
2268 | } | |
2269 | ||
df2c07f4 | 2270 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2271 | { |
df2c07f4 | 2272 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2273 | struct datapath *dp; |
95b1d73a PS |
2274 | int bucket = cb->args[0], skip = cb->args[1]; |
2275 | int i, j = 0; | |
c19e6535 | 2276 | |
2a4999f3 | 2277 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 | 2278 | if (!dp) |
f0fef760 | 2279 | return -ENODEV; |
ed099e92 BP |
2280 | |
2281 | rcu_read_lock(); | |
95b1d73a | 2282 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2283 | struct vport *vport; |
95b1d73a PS |
2284 | |
2285 | j = 0; | |
f8dfbcb7 | 2286 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2287 | if (j >= skip && |
2288 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 2289 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2290 | cb->nlh->nlmsg_seq, |
2291 | NLM_F_MULTI, | |
2292 | OVS_VPORT_CMD_NEW) < 0) | |
2293 | goto out; | |
2294 | ||
2295 | j++; | |
2296 | } | |
2297 | skip = 0; | |
c19e6535 | 2298 | } |
95b1d73a | 2299 | out: |
ed099e92 | 2300 | rcu_read_unlock(); |
c19e6535 | 2301 | |
95b1d73a PS |
2302 | cb->args[0] = i; |
2303 | cb->args[1] = j; | |
f0fef760 | 2304 | |
95b1d73a | 2305 | return skb->len; |
7c40efc9 BP |
2306 | } |
2307 | ||
f0fef760 | 2308 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2309 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
2310 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2311 | .policy = vport_policy, | |
df2c07f4 | 2312 | .doit = ovs_vport_cmd_new |
f0fef760 | 2313 | }, |
df2c07f4 | 2314 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
2315 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2316 | .policy = vport_policy, | |
df2c07f4 | 2317 | .doit = ovs_vport_cmd_del |
f0fef760 | 2318 | }, |
df2c07f4 | 2319 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2320 | .flags = 0, /* OK for unprivileged users. */ |
2321 | .policy = vport_policy, | |
df2c07f4 JP |
2322 | .doit = ovs_vport_cmd_get, |
2323 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2324 | }, |
df2c07f4 | 2325 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
2326 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2327 | .policy = vport_policy, | |
df2c07f4 | 2328 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2329 | }, |
2330 | }; | |
2331 | ||
982b8810 BP |
2332 | struct genl_family_and_ops { |
2333 | struct genl_family *family; | |
2334 | struct genl_ops *ops; | |
2335 | int n_ops; | |
2336 | struct genl_multicast_group *group; | |
2337 | }; | |
ed099e92 | 2338 | |
982b8810 | 2339 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
2340 | { &dp_datapath_genl_family, |
2341 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
850b6b3b | 2342 | &ovs_dp_datapath_multicast_group }, |
f0fef760 BP |
2343 | { &dp_vport_genl_family, |
2344 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
850b6b3b | 2345 | &ovs_dp_vport_multicast_group }, |
37a1300c BP |
2346 | { &dp_flow_genl_family, |
2347 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
850b6b3b | 2348 | &ovs_dp_flow_multicast_group }, |
982b8810 BP |
2349 | { &dp_packet_genl_family, |
2350 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
2351 | NULL }, | |
2352 | }; | |
ed099e92 | 2353 | |
982b8810 BP |
2354 | static void dp_unregister_genl(int n_families) |
2355 | { | |
2356 | int i; | |
ed099e92 | 2357 | |
b867ca75 | 2358 | for (i = 0; i < n_families; i++) |
982b8810 | 2359 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
2360 | } |
2361 | ||
982b8810 | 2362 | static int dp_register_genl(void) |
064af421 | 2363 | { |
982b8810 BP |
2364 | int n_registered; |
2365 | int err; | |
2366 | int i; | |
064af421 | 2367 | |
982b8810 BP |
2368 | n_registered = 0; |
2369 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2370 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 2371 | |
982b8810 BP |
2372 | err = genl_register_family_with_ops(f->family, f->ops, |
2373 | f->n_ops); | |
2374 | if (err) | |
2375 | goto error; | |
2376 | n_registered++; | |
e22d4953 | 2377 | |
982b8810 BP |
2378 | if (f->group) { |
2379 | err = genl_register_mc_group(f->family, f->group); | |
2380 | if (err) | |
2381 | goto error; | |
2382 | } | |
2383 | } | |
9cc8b4e4 | 2384 | |
982b8810 | 2385 | return 0; |
064af421 BP |
2386 | |
2387 | error: | |
982b8810 BP |
2388 | dp_unregister_genl(n_registered); |
2389 | return err; | |
064af421 BP |
2390 | } |
2391 | ||
cd2a59e9 | 2392 | static void rehash_flow_table(struct work_struct *work) |
acd051f1 PS |
2393 | { |
2394 | struct datapath *dp; | |
2a4999f3 PS |
2395 | struct net *net; |
2396 | ||
cd2a59e9 | 2397 | ovs_lock(); |
2a4999f3 PS |
2398 | rtnl_lock(); |
2399 | for_each_net(net) { | |
2400 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
acd051f1 | 2401 | |
2a4999f3 | 2402 | list_for_each_entry(dp, &ovs_net->dps, list_node) { |
cd2a59e9 | 2403 | struct flow_table *old_table = ovsl_dereference(dp->table); |
2a4999f3 | 2404 | struct flow_table *new_table; |
acd051f1 | 2405 | |
2a4999f3 PS |
2406 | new_table = ovs_flow_tbl_rehash(old_table); |
2407 | if (!IS_ERR(new_table)) { | |
2408 | rcu_assign_pointer(dp->table, new_table); | |
a1c564be | 2409 | ovs_flow_tbl_destroy(old_table, true); |
2a4999f3 | 2410 | } |
acd051f1 PS |
2411 | } |
2412 | } | |
2a4999f3 | 2413 | rtnl_unlock(); |
cd2a59e9 | 2414 | ovs_unlock(); |
acd051f1 PS |
2415 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); |
2416 | } | |
2417 | ||
2a4999f3 PS |
2418 | static int __net_init ovs_init_net(struct net *net) |
2419 | { | |
2420 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2421 | ||
2422 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 2423 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
2a4999f3 PS |
2424 | return 0; |
2425 | } | |
2426 | ||
2427 | static void __net_exit ovs_exit_net(struct net *net) | |
2428 | { | |
cd2a59e9 | 2429 | struct datapath *dp, *dp_next; |
2a4999f3 PS |
2430 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
2431 | ||
cd2a59e9 PS |
2432 | ovs_lock(); |
2433 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2434 | __dp_destroy(dp); | |
2435 | ovs_unlock(); | |
2436 | ||
2437 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
2438 | } |
2439 | ||
2440 | static struct pernet_operations ovs_net_ops = { | |
2441 | .init = ovs_init_net, | |
2442 | .exit = ovs_exit_net, | |
2443 | .id = &ovs_net_id, | |
2444 | .size = sizeof(struct ovs_net), | |
2445 | }; | |
2446 | ||
22d24ebf BP |
2447 | static int __init dp_init(void) |
2448 | { | |
2449 | int err; | |
2450 | ||
f3d85db3 | 2451 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2452 | |
dc5f3fef | 2453 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 2454 | VERSION); |
064af421 | 2455 | |
16d650e5 | 2456 | err = ovs_workqueues_init(); |
b9c15df9 | 2457 | if (err) |
cd2a59e9 | 2458 | goto error; |
b9c15df9 | 2459 | |
850b6b3b | 2460 | err = ovs_flow_init(); |
3544358a | 2461 | if (err) |
85c9de19 | 2462 | goto error_wq; |
3544358a | 2463 | |
850b6b3b | 2464 | err = ovs_vport_init(); |
064af421 BP |
2465 | if (err) |
2466 | goto error_flow_exit; | |
2467 | ||
2a4999f3 | 2468 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2469 | if (err) |
2470 | goto error_vport_exit; | |
2471 | ||
2a4999f3 PS |
2472 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2473 | if (err) | |
2474 | goto error_netns_exit; | |
2475 | ||
982b8810 BP |
2476 | err = dp_register_genl(); |
2477 | if (err < 0) | |
37a1300c | 2478 | goto error_unreg_notifier; |
982b8810 | 2479 | |
acd051f1 PS |
2480 | schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL); |
2481 | ||
064af421 BP |
2482 | return 0; |
2483 | ||
2484 | error_unreg_notifier: | |
850b6b3b | 2485 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2486 | error_netns_exit: |
2487 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2488 | error_vport_exit: |
850b6b3b | 2489 | ovs_vport_exit(); |
064af421 | 2490 | error_flow_exit: |
850b6b3b | 2491 | ovs_flow_exit(); |
16d650e5 PS |
2492 | error_wq: |
2493 | ovs_workqueues_exit(); | |
064af421 BP |
2494 | error: |
2495 | return err; | |
2496 | } | |
2497 | ||
2498 | static void dp_cleanup(void) | |
2499 | { | |
acd051f1 | 2500 | cancel_delayed_work_sync(&rehash_flow_wq); |
982b8810 | 2501 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
850b6b3b | 2502 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2503 | unregister_pernet_device(&ovs_net_ops); |
2504 | rcu_barrier(); | |
850b6b3b JG |
2505 | ovs_vport_exit(); |
2506 | ovs_flow_exit(); | |
16d650e5 | 2507 | ovs_workqueues_exit(); |
064af421 BP |
2508 | } |
2509 | ||
2510 | module_init(dp_init); | |
2511 | module_exit(dp_cleanup); | |
2512 | ||
2513 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2514 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2515 | MODULE_VERSION(VERSION); |