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Commit | Line | Data |
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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 | |
064af421 | 57 | #include "datapath.h" |
064af421 | 58 | #include "flow.h" |
d103f479 | 59 | #include "flow_table.h" |
a097c0b2 | 60 | #include "flow_netlink.h" |
303708cc | 61 | #include "vlan.h" |
f2459fe7 | 62 | #include "vport-internal_dev.h" |
d5de5b0d | 63 | #include "vport-netdev.h" |
064af421 | 64 | |
2a4999f3 PS |
65 | int ovs_net_id __read_mostly; |
66 | ||
e297c6b7 TG |
67 | static void ovs_notify(struct sk_buff *skb, struct genl_info *info, |
68 | struct genl_multicast_group *grp) | |
69 | { | |
70 | genl_notify(skb, genl_info_net(info), info->snd_portid, | |
71 | grp->id, info->nlhdr, GFP_KERNEL); | |
72 | } | |
73 | ||
ed099e92 BP |
74 | /** |
75 | * DOC: Locking: | |
064af421 | 76 | * |
cd2a59e9 PS |
77 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
78 | * operations on vports, etc.), Writes to other state (flow table | |
79 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
80 | * by ovs_lock. | |
ed099e92 BP |
81 | * |
82 | * Reads are protected by RCU. | |
83 | * | |
84 | * There are a few special cases (mostly stats) that have their own | |
85 | * synchronization but they nest under all of above and don't interact with | |
86 | * each other. | |
cd2a59e9 PS |
87 | * |
88 | * The RTNL lock nests inside ovs_mutex. | |
064af421 | 89 | */ |
ed099e92 | 90 | |
cd2a59e9 PS |
91 | static DEFINE_MUTEX(ovs_mutex); |
92 | ||
93 | void ovs_lock(void) | |
94 | { | |
95 | mutex_lock(&ovs_mutex); | |
96 | } | |
97 | ||
98 | void ovs_unlock(void) | |
99 | { | |
100 | mutex_unlock(&ovs_mutex); | |
101 | } | |
102 | ||
103 | #ifdef CONFIG_LOCKDEP | |
104 | int lockdep_ovsl_is_held(void) | |
105 | { | |
106 | if (debug_locks) | |
107 | return lockdep_is_held(&ovs_mutex); | |
108 | else | |
109 | return 1; | |
110 | } | |
111 | #endif | |
112 | ||
c19e6535 | 113 | static struct vport *new_vport(const struct vport_parms *); |
5ae440c3 | 114 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
7257b535 | 115 | const struct dp_upcall_info *); |
5ae440c3 | 116 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
7257b535 | 117 | const struct dp_upcall_info *); |
064af421 | 118 | |
cd2a59e9 | 119 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 120 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
064af421 | 121 | { |
254f2dc8 BP |
122 | struct datapath *dp = NULL; |
123 | struct net_device *dev; | |
ed099e92 | 124 | |
254f2dc8 | 125 | rcu_read_lock(); |
2a4999f3 | 126 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
254f2dc8 | 127 | if (dev) { |
850b6b3b | 128 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 BP |
129 | if (vport) |
130 | dp = vport->dp; | |
131 | } | |
132 | rcu_read_unlock(); | |
133 | ||
134 | return dp; | |
064af421 | 135 | } |
064af421 | 136 | |
cd2a59e9 | 137 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 138 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 139 | { |
cd2a59e9 | 140 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
16b82e84 | 141 | return vport->ops->get_name(vport); |
f2459fe7 JG |
142 | } |
143 | ||
99769a40 JG |
144 | static int get_dpifindex(struct datapath *dp) |
145 | { | |
146 | struct vport *local; | |
147 | int ifindex; | |
148 | ||
149 | rcu_read_lock(); | |
150 | ||
95b1d73a | 151 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 152 | if (local) |
d5de5b0d | 153 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
99769a40 JG |
154 | else |
155 | ifindex = 0; | |
156 | ||
157 | rcu_read_unlock(); | |
158 | ||
159 | return ifindex; | |
160 | } | |
161 | ||
46c6a11d JG |
162 | static void destroy_dp_rcu(struct rcu_head *rcu) |
163 | { | |
164 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 165 | |
46c6a11d | 166 | free_percpu(dp->stats_percpu); |
2a4999f3 | 167 | release_net(ovs_dp_get_net(dp)); |
95b1d73a | 168 | kfree(dp->ports); |
5ca1ba48 | 169 | kfree(dp); |
46c6a11d JG |
170 | } |
171 | ||
95b1d73a PS |
172 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
173 | u16 port_no) | |
174 | { | |
175 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
176 | } | |
177 | ||
178 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) | |
179 | { | |
180 | struct vport *vport; | |
95b1d73a PS |
181 | struct hlist_head *head; |
182 | ||
183 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 184 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
185 | if (vport->port_no == port_no) |
186 | return vport; | |
187 | } | |
188 | return NULL; | |
189 | } | |
190 | ||
cd2a59e9 | 191 | /* Called with ovs_mutex. */ |
c19e6535 | 192 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 193 | { |
f2459fe7 | 194 | struct vport *vport; |
f2459fe7 | 195 | |
850b6b3b | 196 | vport = ovs_vport_add(parms); |
c19e6535 BP |
197 | if (!IS_ERR(vport)) { |
198 | struct datapath *dp = parms->dp; | |
95b1d73a | 199 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 200 | |
95b1d73a | 201 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 202 | } |
c19e6535 | 203 | return vport; |
064af421 BP |
204 | } |
205 | ||
850b6b3b | 206 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 207 | { |
cd2a59e9 | 208 | ASSERT_OVSL(); |
064af421 | 209 | |
064af421 | 210 | /* First drop references to device. */ |
95b1d73a | 211 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 212 | |
7237e4f4 | 213 | /* Then destroy it. */ |
850b6b3b | 214 | ovs_vport_del(p); |
064af421 BP |
215 | } |
216 | ||
8819fac7 | 217 | /* Must be called with rcu_read_lock. */ |
850b6b3b | 218 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
219 | { |
220 | struct datapath *dp = p->dp; | |
3544358a | 221 | struct sw_flow *flow; |
064af421 | 222 | struct dp_stats_percpu *stats; |
52a23d92 | 223 | struct sw_flow_key key; |
e9141eec | 224 | u64 *stats_counter; |
4fa72a95 | 225 | u32 n_mask_hit; |
4c1ad233 | 226 | int error; |
064af421 | 227 | |
70dbc259 | 228 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 229 | |
52a23d92 | 230 | /* Extract flow from 'skb' into 'key'. */ |
a1c564be | 231 | error = ovs_flow_extract(skb, p->port_no, &key); |
52a23d92 JG |
232 | if (unlikely(error)) { |
233 | kfree_skb(skb); | |
234 | return; | |
55574bb0 BP |
235 | } |
236 | ||
52a23d92 | 237 | /* Look up flow. */ |
4f88b5e5 | 238 | flow = ovs_flow_tbl_lookup_stats(&dp->table, &key, &n_mask_hit); |
52a23d92 JG |
239 | if (unlikely(!flow)) { |
240 | struct dp_upcall_info upcall; | |
241 | ||
242 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
243 | upcall.key = &key; | |
244 | upcall.userdata = NULL; | |
245 | upcall.portid = p->upcall_portid; | |
246 | ovs_dp_upcall(dp, skb, &upcall); | |
247 | consume_skb(skb); | |
248 | stats_counter = &stats->n_missed; | |
249 | goto out; | |
250 | } | |
251 | ||
252 | OVS_CB(skb)->flow = flow; | |
d1d71a36 | 253 | OVS_CB(skb)->pkt_key = &key; |
52a23d92 | 254 | |
b0b906cc | 255 | ovs_flow_stats_update(OVS_CB(skb)->flow, skb); |
850b6b3b | 256 | ovs_execute_actions(dp, skb); |
b0b906cc | 257 | stats_counter = &stats->n_hit; |
55574bb0 | 258 | |
8819fac7 | 259 | out: |
55574bb0 | 260 | /* Update datapath statistics. */ |
821cb9fa | 261 | u64_stats_update_begin(&stats->sync); |
e9141eec | 262 | (*stats_counter)++; |
4fa72a95 | 263 | stats->n_mask_hit += n_mask_hit; |
821cb9fa | 264 | u64_stats_update_end(&stats->sync); |
064af421 BP |
265 | } |
266 | ||
aa5a8fdc JG |
267 | static struct genl_family dp_packet_genl_family = { |
268 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
269 | .hdrsize = sizeof(struct ovs_header), |
270 | .name = OVS_PACKET_FAMILY, | |
69685a88 | 271 | .version = OVS_PACKET_VERSION, |
2a4999f3 | 272 | .maxattr = OVS_PACKET_ATTR_MAX, |
b3dcb73c | 273 | .netnsok = true, |
14002a59 | 274 | SET_PARALLEL_OPS |
aa5a8fdc JG |
275 | }; |
276 | ||
850b6b3b JG |
277 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
278 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc JG |
279 | { |
280 | struct dp_stats_percpu *stats; | |
281 | int err; | |
282 | ||
28aea917 | 283 | if (upcall_info->portid == 0) { |
b063d9f0 | 284 | err = -ENOTCONN; |
b063d9f0 JG |
285 | goto err; |
286 | } | |
287 | ||
7257b535 | 288 | if (!skb_is_gso(skb)) |
5ae440c3 | 289 | err = queue_userspace_packet(dp, skb, upcall_info); |
7257b535 | 290 | else |
5ae440c3 | 291 | err = queue_gso_packets(dp, skb, upcall_info); |
d76195db JG |
292 | if (err) |
293 | goto err; | |
294 | ||
295 | return 0; | |
aa5a8fdc | 296 | |
aa5a8fdc | 297 | err: |
70dbc259 | 298 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 299 | |
821cb9fa | 300 | u64_stats_update_begin(&stats->sync); |
aa5a8fdc | 301 | stats->n_lost++; |
821cb9fa | 302 | u64_stats_update_end(&stats->sync); |
aa5a8fdc | 303 | |
aa5a8fdc | 304 | return err; |
982b8810 BP |
305 | } |
306 | ||
5ae440c3 | 307 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
7257b535 | 308 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 309 | { |
d4cba1f8 | 310 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
311 | struct dp_upcall_info later_info; |
312 | struct sw_flow_key later_key; | |
313 | struct sk_buff *segs, *nskb; | |
314 | int err; | |
cb5087ca | 315 | |
1d04cd4e | 316 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
79089764 PS |
317 | if (IS_ERR(segs)) |
318 | return PTR_ERR(segs); | |
99769a40 | 319 | |
7257b535 BP |
320 | /* Queue all of the segments. */ |
321 | skb = segs; | |
cb5087ca | 322 | do { |
5ae440c3 | 323 | err = queue_userspace_packet(dp, skb, upcall_info); |
982b8810 | 324 | if (err) |
7257b535 | 325 | break; |
856081f6 | 326 | |
d4cba1f8 | 327 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
e1cf87ff JG |
328 | /* The initial flow key extracted by ovs_flow_extract() |
329 | * in this case is for a first fragment, so we need to | |
7257b535 BP |
330 | * properly mark later fragments. |
331 | */ | |
332 | later_key = *upcall_info->key; | |
9e44d715 | 333 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
7257b535 BP |
334 | |
335 | later_info = *upcall_info; | |
336 | later_info.key = &later_key; | |
337 | upcall_info = &later_info; | |
338 | } | |
36ce148c | 339 | } while ((skb = skb->next)); |
cb5087ca | 340 | |
7257b535 BP |
341 | /* Free all of the segments. */ |
342 | skb = segs; | |
343 | do { | |
344 | nskb = skb->next; | |
345 | if (err) | |
346 | kfree_skb(skb); | |
347 | else | |
348 | consume_skb(skb); | |
349 | } while ((skb = nskb)); | |
350 | return err; | |
351 | } | |
352 | ||
0afa2373 TG |
353 | static size_t key_attr_size(void) |
354 | { | |
355 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
356 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ | |
357 | + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
358 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
359 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
360 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
361 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
362 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
363 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
364 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ | |
365 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
366 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
367 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
368 | + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */ | |
369 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
370 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
371 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
372 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
373 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
374 | } | |
375 | ||
533bea51 TG |
376 | static size_t upcall_msg_size(const struct nlattr *userdata, |
377 | unsigned int hdrlen) | |
0afa2373 TG |
378 | { |
379 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
533bea51 | 380 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
0afa2373 TG |
381 | + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
382 | ||
383 | /* OVS_PACKET_ATTR_USERDATA */ | |
384 | if (userdata) | |
385 | size += NLA_ALIGN(userdata->nla_len); | |
386 | ||
387 | return size; | |
388 | } | |
389 | ||
5ae440c3 | 390 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
7257b535 BP |
391 | const struct dp_upcall_info *upcall_info) |
392 | { | |
393 | struct ovs_header *upcall; | |
6161d3fd | 394 | struct sk_buff *nskb = NULL; |
7257b535 BP |
395 | struct sk_buff *user_skb; /* to be queued to userspace */ |
396 | struct nlattr *nla; | |
68eadcf0 TG |
397 | struct genl_info info = { |
398 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0) | |
5ae440c3 | 399 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
68eadcf0 TG |
400 | #endif |
401 | .snd_portid = upcall_info->portid, | |
402 | }; | |
ef507cec | 403 | size_t len, plen; |
533bea51 | 404 | unsigned int hlen; |
5ae440c3 TG |
405 | int err, dp_ifindex; |
406 | ||
407 | dp_ifindex = get_dpifindex(dp); | |
408 | if (!dp_ifindex) | |
409 | return -ENODEV; | |
7257b535 | 410 | |
6161d3fd JG |
411 | if (vlan_tx_tag_present(skb)) { |
412 | nskb = skb_clone(skb, GFP_ATOMIC); | |
413 | if (!nskb) | |
414 | return -ENOMEM; | |
07ac71ea PS |
415 | |
416 | nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb)); | |
417 | if (!nskb) | |
418 | return -ENOMEM; | |
419 | ||
420 | vlan_set_tci(nskb, 0); | |
7257b535 | 421 | |
6161d3fd JG |
422 | skb = nskb; |
423 | } | |
424 | ||
425 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
426 | err = -EFBIG; | |
427 | goto out; | |
428 | } | |
7257b535 | 429 | |
533bea51 TG |
430 | /* Complete checksum if needed */ |
431 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
432 | (err = skb_checksum_help(skb))) | |
433 | goto out; | |
434 | ||
435 | /* Older versions of OVS user space enforce alignment of the last | |
436 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
437 | * padding logic. Only perform zerocopy if padding is not required. | |
438 | */ | |
439 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
440 | hlen = skb_zerocopy_headlen(skb); | |
441 | else | |
442 | hlen = skb->len; | |
443 | ||
444 | len = upcall_msg_size(upcall_info->userdata, hlen); | |
68eadcf0 | 445 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
6161d3fd JG |
446 | if (!user_skb) { |
447 | err = -ENOMEM; | |
448 | goto out; | |
449 | } | |
7257b535 BP |
450 | |
451 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
452 | 0, upcall_info->cmd); | |
453 | upcall->dp_ifindex = dp_ifindex; | |
454 | ||
455 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
a097c0b2 | 456 | ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb); |
7257b535 BP |
457 | nla_nest_end(user_skb, nla); |
458 | ||
459 | if (upcall_info->userdata) | |
e995e3df | 460 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 461 | nla_len(upcall_info->userdata), |
e995e3df | 462 | nla_data(upcall_info->userdata)); |
7257b535 | 463 | |
533bea51 TG |
464 | /* Only reserve room for attribute header, packet data is added |
465 | * in skb_zerocopy() */ | |
466 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
467 | err = -ENOBUFS; | |
468 | goto out; | |
469 | } | |
470 | nla->nla_len = nla_attr_size(skb->len); | |
bed53bd1 | 471 | |
533bea51 | 472 | skb_zerocopy(user_skb, skb, skb->len, hlen); |
7257b535 | 473 | |
ef507cec TG |
474 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
475 | if (!(dp->user_features & OVS_DP_F_UNALIGNED) && | |
476 | (plen = (ALIGN(user_skb->len, NLA_ALIGNTO) - user_skb->len)) > 0) | |
477 | memset(skb_put(user_skb, plen), 0, plen); | |
478 | ||
533bea51 | 479 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
6161d3fd | 480 | |
533bea51 | 481 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
6161d3fd JG |
482 | out: |
483 | kfree_skb(nskb); | |
484 | return err; | |
cb5087ca BP |
485 | } |
486 | ||
df2c07f4 | 487 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 488 | { |
df2c07f4 | 489 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 490 | struct nlattr **a = info->attrs; |
e0e57990 | 491 | struct sw_flow_actions *acts; |
982b8810 | 492 | struct sk_buff *packet; |
e0e57990 | 493 | struct sw_flow *flow; |
f7cd0081 | 494 | struct datapath *dp; |
d6569377 | 495 | struct ethhdr *eth; |
3f19d399 | 496 | int len; |
d6569377 | 497 | int err; |
064af421 | 498 | |
f7cd0081 | 499 | err = -EINVAL; |
df2c07f4 | 500 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 501 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 502 | goto err; |
064af421 | 503 | |
df2c07f4 | 504 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 505 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
506 | err = -ENOMEM; |
507 | if (!packet) | |
e5cad958 | 508 | goto err; |
3f19d399 BP |
509 | skb_reserve(packet, NET_IP_ALIGN); |
510 | ||
bf3d6fce | 511 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 512 | |
f7cd0081 BP |
513 | skb_reset_mac_header(packet); |
514 | eth = eth_hdr(packet); | |
064af421 | 515 | |
d6569377 BP |
516 | /* Normally, setting the skb 'protocol' field would be handled by a |
517 | * call to eth_type_trans(), but it assumes there's a sending | |
518 | * device, which we may not have. */ | |
7cd46155 | 519 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
f7cd0081 | 520 | packet->protocol = eth->h_proto; |
d6569377 | 521 | else |
f7cd0081 | 522 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 523 | |
e0e57990 | 524 | /* Build an sw_flow for sending this packet. */ |
b0f3a2fe | 525 | flow = ovs_flow_alloc(false); |
e0e57990 BP |
526 | err = PTR_ERR(flow); |
527 | if (IS_ERR(flow)) | |
e5cad958 | 528 | goto err_kfree_skb; |
064af421 | 529 | |
a1c564be | 530 | err = ovs_flow_extract(packet, -1, &flow->key); |
e0e57990 | 531 | if (err) |
9321954a | 532 | goto err_flow_free; |
e0e57990 | 533 | |
a097c0b2 | 534 | err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 | 535 | if (err) |
9321954a | 536 | goto err_flow_free; |
a097c0b2 | 537 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
e0e57990 BP |
538 | err = PTR_ERR(acts); |
539 | if (IS_ERR(acts)) | |
9321954a | 540 | goto err_flow_free; |
9b405f1a | 541 | |
a097c0b2 PS |
542 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
543 | &flow->key, 0, &acts); | |
e0e57990 | 544 | rcu_assign_pointer(flow->sf_acts, acts); |
9b405f1a PS |
545 | if (err) |
546 | goto err_flow_free; | |
e0e57990 BP |
547 | |
548 | OVS_CB(packet)->flow = flow; | |
d1d71a36 | 549 | OVS_CB(packet)->pkt_key = &flow->key; |
abff858b | 550 | packet->priority = flow->key.phy.priority; |
3025a772 | 551 | packet->mark = flow->key.phy.skb_mark; |
e0e57990 | 552 | |
d6569377 | 553 | rcu_read_lock(); |
2a4999f3 | 554 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
f7cd0081 | 555 | err = -ENODEV; |
e5cad958 BP |
556 | if (!dp) |
557 | goto err_unlock; | |
cc4015df | 558 | |
e9141eec | 559 | local_bh_disable(); |
850b6b3b | 560 | err = ovs_execute_actions(dp, packet); |
e9141eec | 561 | local_bh_enable(); |
d6569377 | 562 | rcu_read_unlock(); |
e0e57990 | 563 | |
a1c564be | 564 | ovs_flow_free(flow, false); |
e5cad958 | 565 | return err; |
064af421 | 566 | |
e5cad958 BP |
567 | err_unlock: |
568 | rcu_read_unlock(); | |
9321954a | 569 | err_flow_free: |
a1c564be | 570 | ovs_flow_free(flow, false); |
e5cad958 BP |
571 | err_kfree_skb: |
572 | kfree_skb(packet); | |
573 | err: | |
d6569377 | 574 | return err; |
064af421 BP |
575 | } |
576 | ||
df2c07f4 | 577 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc | 578 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
df2c07f4 JP |
579 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
580 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
581 | }; |
582 | ||
583 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 584 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
585 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
586 | .policy = packet_policy, | |
df2c07f4 | 587 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
588 | } |
589 | }; | |
590 | ||
4fa72a95 AZ |
591 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats, |
592 | struct ovs_dp_megaflow_stats *mega_stats) | |
064af421 | 593 | { |
d6569377 | 594 | int i; |
f180c2e2 | 595 | |
4fa72a95 AZ |
596 | memset(mega_stats, 0, sizeof(*mega_stats)); |
597 | ||
994dc286 | 598 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
4fa72a95 | 599 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
064af421 | 600 | |
7257b535 | 601 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
4fa72a95 | 602 | |
d6569377 BP |
603 | for_each_possible_cpu(i) { |
604 | const struct dp_stats_percpu *percpu_stats; | |
605 | struct dp_stats_percpu local_stats; | |
821cb9fa | 606 | unsigned int start; |
44e05eca | 607 | |
d6569377 | 608 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 609 | |
d6569377 | 610 | do { |
821cb9fa | 611 | start = u64_stats_fetch_begin_bh(&percpu_stats->sync); |
d6569377 | 612 | local_stats = *percpu_stats; |
821cb9fa | 613 | } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); |
064af421 | 614 | |
d6569377 BP |
615 | stats->n_hit += local_stats.n_hit; |
616 | stats->n_missed += local_stats.n_missed; | |
617 | stats->n_lost += local_stats.n_lost; | |
4fa72a95 | 618 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
d6569377 BP |
619 | } |
620 | } | |
064af421 | 621 | |
df2c07f4 JP |
622 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
623 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
624 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
625 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 626 | }; |
36956a7d | 627 | |
37a1300c BP |
628 | static struct genl_family dp_flow_genl_family = { |
629 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
630 | .hdrsize = sizeof(struct ovs_header), |
631 | .name = OVS_FLOW_FAMILY, | |
69685a88 | 632 | .version = OVS_FLOW_VERSION, |
2a4999f3 | 633 | .maxattr = OVS_FLOW_ATTR_MAX, |
b3dcb73c | 634 | .netnsok = true, |
14002a59 | 635 | SET_PARALLEL_OPS |
37a1300c | 636 | }; |
ed099e92 | 637 | |
850b6b3b | 638 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { |
df2c07f4 | 639 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
640 | }; |
641 | ||
0afa2373 TG |
642 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
643 | { | |
644 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
645 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
a1c564be | 646 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */ |
0afa2373 TG |
647 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
648 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
649 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
650 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
651 | } | |
652 | ||
cd2a59e9 | 653 | /* Called with ovs_mutex. */ |
df2c07f4 | 654 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
28aea917 | 655 | struct sk_buff *skb, u32 portid, |
6455100f | 656 | u32 seq, u32 flags, u8 cmd) |
d6569377 | 657 | { |
37a1300c | 658 | const int skb_orig_len = skb->len; |
9b405f1a | 659 | struct nlattr *start; |
b0f3a2fe PS |
660 | struct ovs_flow_stats stats; |
661 | __be16 tcp_flags; | |
662 | unsigned long used; | |
df2c07f4 | 663 | struct ovs_header *ovs_header; |
d6569377 | 664 | struct nlattr *nla; |
d6569377 | 665 | int err; |
064af421 | 666 | |
28aea917 | 667 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
df2c07f4 | 668 | if (!ovs_header) |
37a1300c | 669 | return -EMSGSIZE; |
d6569377 | 670 | |
99769a40 | 671 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 672 | |
a1c564be | 673 | /* Fill flow key. */ |
df2c07f4 | 674 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
675 | if (!nla) |
676 | goto nla_put_failure; | |
a1c564be | 677 | |
a097c0b2 | 678 | err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb); |
d6569377 | 679 | if (err) |
37a1300c | 680 | goto error; |
d6569377 BP |
681 | nla_nest_end(skb, nla); |
682 | ||
a1c564be AZ |
683 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); |
684 | if (!nla) | |
685 | goto nla_put_failure; | |
686 | ||
a097c0b2 | 687 | err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb); |
a1c564be AZ |
688 | if (err) |
689 | goto error; | |
690 | ||
691 | nla_nest_end(skb, nla); | |
692 | ||
b0f3a2fe PS |
693 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
694 | if (used && | |
695 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
c3cc8c03 | 696 | goto nla_put_failure; |
d6569377 | 697 | |
b0f3a2fe PS |
698 | if (stats.n_packets && |
699 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) | |
700 | goto nla_put_failure; | |
b0b906cc | 701 | |
b0f3a2fe PS |
702 | if ((u8)ntohs(tcp_flags) && |
703 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
c3cc8c03 | 704 | goto nla_put_failure; |
d6569377 | 705 | |
df2c07f4 | 706 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
707 | * this is the first flow to be dumped into 'skb'. This is unusual for |
708 | * Netlink but individual action lists can be longer than | |
709 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
710 | * The userspace caller can always fetch the actions separately if it | |
711 | * really wants them. (Most userspace callers in fact don't care.) | |
712 | * | |
713 | * This can only fail for dump operations because the skb is always | |
714 | * properly sized for single flows. | |
715 | */ | |
9b405f1a | 716 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 717 | if (start) { |
f44ccce1 PS |
718 | const struct sw_flow_actions *sf_acts; |
719 | ||
780ec6ae | 720 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
f44ccce1 | 721 | |
a097c0b2 PS |
722 | err = ovs_nla_put_actions(sf_acts->actions, |
723 | sf_acts->actions_len, skb); | |
0a25b039 BP |
724 | if (!err) |
725 | nla_nest_end(skb, start); | |
726 | else { | |
727 | if (skb_orig_len) | |
728 | goto error; | |
729 | ||
730 | nla_nest_cancel(skb, start); | |
731 | } | |
7aac03bd JG |
732 | } else if (skb_orig_len) |
733 | goto nla_put_failure; | |
37a1300c | 734 | |
df2c07f4 | 735 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
736 | |
737 | nla_put_failure: | |
738 | err = -EMSGSIZE; | |
37a1300c | 739 | error: |
df2c07f4 | 740 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 741 | return err; |
44e05eca BP |
742 | } |
743 | ||
68eadcf0 TG |
744 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow, |
745 | struct genl_info *info) | |
44e05eca | 746 | { |
68eadcf0 | 747 | size_t len; |
d6569377 | 748 | |
68eadcf0 | 749 | len = ovs_flow_cmd_msg_size(ovsl_dereference(flow->sf_acts)); |
d6569377 | 750 | |
68eadcf0 | 751 | return genlmsg_new_unicast(len, info, GFP_KERNEL); |
37a1300c | 752 | } |
8d5ebd83 | 753 | |
6455100f PS |
754 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, |
755 | struct datapath *dp, | |
68eadcf0 TG |
756 | struct genl_info *info, |
757 | u8 cmd) | |
37a1300c BP |
758 | { |
759 | struct sk_buff *skb; | |
760 | int retval; | |
d6569377 | 761 | |
68eadcf0 | 762 | skb = ovs_flow_cmd_alloc_info(flow, info); |
37a1300c BP |
763 | if (!skb) |
764 | return ERR_PTR(-ENOMEM); | |
d6569377 | 765 | |
68eadcf0 TG |
766 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, info->snd_portid, |
767 | info->snd_seq, 0, cmd); | |
37a1300c | 768 | BUG_ON(retval < 0); |
d6569377 | 769 | return skb; |
064af421 BP |
770 | } |
771 | ||
df2c07f4 | 772 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 773 | { |
37a1300c | 774 | struct nlattr **a = info->attrs; |
df2c07f4 | 775 | struct ovs_header *ovs_header = info->userhdr; |
529db635 | 776 | struct sw_flow_key key, masked_key; |
a1c564be AZ |
777 | struct sw_flow *flow = NULL; |
778 | struct sw_flow_mask mask; | |
37a1300c | 779 | struct sk_buff *reply; |
9c52546b | 780 | struct datapath *dp; |
9b405f1a | 781 | struct sw_flow_actions *acts = NULL; |
a1c564be | 782 | struct sw_flow_match match; |
b0f3a2fe | 783 | bool exact_5tuple; |
bc4a05c6 | 784 | int error; |
064af421 | 785 | |
37a1300c BP |
786 | /* Extract key. */ |
787 | error = -EINVAL; | |
df2c07f4 | 788 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 789 | goto error; |
a1c564be AZ |
790 | |
791 | ovs_match_init(&match, &key, &mask); | |
b0f3a2fe | 792 | error = ovs_nla_get_match(&match, &exact_5tuple, |
a097c0b2 | 793 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); |
37a1300c BP |
794 | if (error) |
795 | goto error; | |
064af421 | 796 | |
37a1300c | 797 | /* Validate actions. */ |
df2c07f4 | 798 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
a097c0b2 | 799 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
9b405f1a PS |
800 | error = PTR_ERR(acts); |
801 | if (IS_ERR(acts)) | |
37a1300c | 802 | goto error; |
9b405f1a | 803 | |
a097c0b2 PS |
804 | ovs_flow_mask_key(&masked_key, &key, &mask); |
805 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], | |
806 | &masked_key, 0, &acts); | |
529db635 JG |
807 | if (error) { |
808 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
9b405f1a | 809 | goto err_kfree; |
529db635 | 810 | } |
df2c07f4 | 811 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
812 | error = -EINVAL; |
813 | goto error; | |
814 | } | |
815 | ||
cd2a59e9 | 816 | ovs_lock(); |
2a4999f3 | 817 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
d6569377 | 818 | error = -ENODEV; |
9c52546b | 819 | if (!dp) |
cd2a59e9 | 820 | goto err_unlock_ovs; |
704a1e09 | 821 | |
a1c564be | 822 | /* Check if this is a duplicate flow */ |
4f88b5e5 | 823 | flow = ovs_flow_tbl_lookup(&dp->table, &key); |
3544358a | 824 | if (!flow) { |
d6569377 BP |
825 | /* Bail out if we're not allowed to create a new flow. */ |
826 | error = -ENOENT; | |
df2c07f4 | 827 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
cd2a59e9 | 828 | goto err_unlock_ovs; |
d6569377 | 829 | |
d6569377 | 830 | /* Allocate flow. */ |
b0f3a2fe | 831 | flow = ovs_flow_alloc(!exact_5tuple); |
d6569377 BP |
832 | if (IS_ERR(flow)) { |
833 | error = PTR_ERR(flow); | |
cd2a59e9 | 834 | goto err_unlock_ovs; |
d6569377 | 835 | } |
d6569377 | 836 | |
529db635 JG |
837 | flow->key = masked_key; |
838 | flow->unmasked_key = key; | |
d6569377 BP |
839 | rcu_assign_pointer(flow->sf_acts, acts); |
840 | ||
d6569377 | 841 | /* Put flow in bucket. */ |
0585f7a8 PS |
842 | error = ovs_flow_tbl_insert(&dp->table, flow, &mask); |
843 | if (error) { | |
844 | acts = NULL; | |
845 | goto err_flow_free; | |
846 | } | |
37a1300c | 847 | |
68eadcf0 | 848 | reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW); |
d6569377 BP |
849 | } else { |
850 | /* We found a matching flow. */ | |
851 | struct sw_flow_actions *old_acts; | |
852 | ||
853 | /* Bail out if we're not allowed to modify an existing flow. | |
854 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
855 | * because Generic Netlink treats the latter as a dump | |
856 | * request. We also accept NLM_F_EXCL in case that bug ever | |
857 | * gets fixed. | |
858 | */ | |
859 | error = -EEXIST; | |
df2c07f4 | 860 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c | 861 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
cd2a59e9 | 862 | goto err_unlock_ovs; |
d6569377 | 863 | |
b21e5b6a | 864 | /* The unmasked key has to be the same for flow updates. */ |
a6603481 | 865 | if (!ovs_flow_cmp_unmasked_key(flow, &match)) |
b21e5b6a AZ |
866 | goto err_unlock_ovs; |
867 | ||
d6569377 | 868 | /* Update actions. */ |
cd2a59e9 | 869 | old_acts = ovsl_dereference(flow->sf_acts); |
9b405f1a | 870 | rcu_assign_pointer(flow->sf_acts, acts); |
a097c0b2 | 871 | ovs_nla_free_flow_actions(old_acts); |
d6569377 | 872 | |
68eadcf0 | 873 | reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW); |
d6569377 BP |
874 | |
875 | /* Clear stats. */ | |
b0b906cc PS |
876 | if (a[OVS_FLOW_ATTR_CLEAR]) |
877 | ovs_flow_stats_clear(flow); | |
9c52546b | 878 | } |
cd2a59e9 | 879 | ovs_unlock(); |
37a1300c BP |
880 | |
881 | if (!IS_ERR(reply)) | |
e297c6b7 | 882 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
37a1300c | 883 | else |
b3dcb73c | 884 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, |
2a4999f3 | 885 | ovs_dp_flow_multicast_group.id, PTR_ERR(reply)); |
d6569377 | 886 | return 0; |
704a1e09 | 887 | |
a1c564be AZ |
888 | err_flow_free: |
889 | ovs_flow_free(flow, false); | |
cd2a59e9 PS |
890 | err_unlock_ovs: |
891 | ovs_unlock(); | |
9b405f1a | 892 | err_kfree: |
ba400435 | 893 | kfree(acts); |
37a1300c | 894 | error: |
9c52546b | 895 | return error; |
704a1e09 BP |
896 | } |
897 | ||
df2c07f4 | 898 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 899 | { |
37a1300c | 900 | struct nlattr **a = info->attrs; |
df2c07f4 | 901 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 902 | struct sw_flow_key key; |
37a1300c | 903 | struct sk_buff *reply; |
704a1e09 | 904 | struct sw_flow *flow; |
9c52546b | 905 | struct datapath *dp; |
a1c564be | 906 | struct sw_flow_match match; |
9c52546b | 907 | int err; |
704a1e09 | 908 | |
1b936472 AZ |
909 | if (!a[OVS_FLOW_ATTR_KEY]) { |
910 | OVS_NLERR("Flow get message rejected, Key attribute missing.\n"); | |
37a1300c | 911 | return -EINVAL; |
1b936472 | 912 | } |
a1c564be AZ |
913 | |
914 | ovs_match_init(&match, &key, NULL); | |
b0f3a2fe | 915 | err = ovs_nla_get_match(&match, NULL, a[OVS_FLOW_ATTR_KEY], NULL); |
37a1300c BP |
916 | if (err) |
917 | return err; | |
704a1e09 | 918 | |
cd2a59e9 | 919 | ovs_lock(); |
2a4999f3 | 920 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
921 | if (!dp) { |
922 | err = -ENODEV; | |
923 | goto unlock; | |
924 | } | |
704a1e09 | 925 | |
4f88b5e5 | 926 | flow = ovs_flow_tbl_lookup(&dp->table, &key); |
a097c0b2 | 927 | if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) { |
cd2a59e9 PS |
928 | err = -ENOENT; |
929 | goto unlock; | |
930 | } | |
d6569377 | 931 | |
68eadcf0 | 932 | reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW); |
cd2a59e9 PS |
933 | if (IS_ERR(reply)) { |
934 | err = PTR_ERR(reply); | |
935 | goto unlock; | |
936 | } | |
36956a7d | 937 | |
cd2a59e9 | 938 | ovs_unlock(); |
37a1300c | 939 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
940 | unlock: |
941 | ovs_unlock(); | |
942 | return err; | |
d6569377 | 943 | } |
9c52546b | 944 | |
df2c07f4 | 945 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 946 | { |
37a1300c | 947 | struct nlattr **a = info->attrs; |
df2c07f4 | 948 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 949 | struct sw_flow_key key; |
37a1300c | 950 | struct sk_buff *reply; |
d6569377 | 951 | struct sw_flow *flow; |
d6569377 | 952 | struct datapath *dp; |
a1c564be | 953 | struct sw_flow_match match; |
d6569377 | 954 | int err; |
36956a7d | 955 | |
cd2a59e9 | 956 | ovs_lock(); |
2a4999f3 | 957 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
958 | if (!dp) { |
959 | err = -ENODEV; | |
960 | goto unlock; | |
961 | } | |
2a4999f3 | 962 | |
cd2a59e9 | 963 | if (!a[OVS_FLOW_ATTR_KEY]) { |
994dc286 | 964 | err = ovs_flow_tbl_flush(&dp->table); |
cd2a59e9 PS |
965 | goto unlock; |
966 | } | |
a1c564be AZ |
967 | |
968 | ovs_match_init(&match, &key, NULL); | |
b0f3a2fe | 969 | err = ovs_nla_get_match(&match, NULL, a[OVS_FLOW_ATTR_KEY], NULL); |
37a1300c | 970 | if (err) |
cd2a59e9 | 971 | goto unlock; |
d6569377 | 972 | |
4f88b5e5 | 973 | flow = ovs_flow_tbl_lookup(&dp->table, &key); |
a097c0b2 | 974 | if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) { |
cd2a59e9 PS |
975 | err = -ENOENT; |
976 | goto unlock; | |
977 | } | |
d6569377 | 978 | |
68eadcf0 | 979 | reply = ovs_flow_cmd_alloc_info(flow, info); |
cd2a59e9 PS |
980 | if (!reply) { |
981 | err = -ENOMEM; | |
982 | goto unlock; | |
983 | } | |
37a1300c | 984 | |
994dc286 | 985 | ovs_flow_tbl_remove(&dp->table, flow); |
37a1300c | 986 | |
28aea917 | 987 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid, |
df2c07f4 | 988 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); |
37a1300c BP |
989 | BUG_ON(err < 0); |
990 | ||
a1c564be | 991 | ovs_flow_free(flow, true); |
cd2a59e9 | 992 | ovs_unlock(); |
37a1300c | 993 | |
e297c6b7 | 994 | ovs_notify(reply, info, &ovs_dp_flow_multicast_group); |
37a1300c | 995 | return 0; |
cd2a59e9 PS |
996 | unlock: |
997 | ovs_unlock(); | |
998 | return err; | |
37a1300c BP |
999 | } |
1000 | ||
df2c07f4 | 1001 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1002 | { |
df2c07f4 | 1003 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
994dc286 | 1004 | struct table_instance *ti; |
37a1300c BP |
1005 | struct datapath *dp; |
1006 | ||
f44ccce1 | 1007 | rcu_read_lock(); |
2a4999f3 | 1008 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 1009 | if (!dp) { |
f44ccce1 | 1010 | rcu_read_unlock(); |
37a1300c | 1011 | return -ENODEV; |
cd2a59e9 | 1012 | } |
37a1300c | 1013 | |
994dc286 | 1014 | ti = rcu_dereference(dp->table.ti); |
37a1300c | 1015 | for (;;) { |
37a1300c BP |
1016 | struct sw_flow *flow; |
1017 | u32 bucket, obj; | |
1018 | ||
1019 | bucket = cb->args[0]; | |
1020 | obj = cb->args[1]; | |
994dc286 | 1021 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
3544358a | 1022 | if (!flow) |
37a1300c BP |
1023 | break; |
1024 | ||
6455100f | 1025 | if (ovs_flow_cmd_fill_info(flow, dp, skb, |
28aea917 | 1026 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1027 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1028 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1029 | break; |
1030 | ||
1031 | cb->args[0] = bucket; | |
1032 | cb->args[1] = obj; | |
1033 | } | |
f44ccce1 | 1034 | rcu_read_unlock(); |
37a1300c | 1035 | return skb->len; |
704a1e09 BP |
1036 | } |
1037 | ||
37a1300c | 1038 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1039 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1040 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1041 | .policy = flow_policy, | |
df2c07f4 | 1042 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1043 | }, |
df2c07f4 | 1044 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1045 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1046 | .policy = flow_policy, | |
df2c07f4 | 1047 | .doit = ovs_flow_cmd_del |
37a1300c | 1048 | }, |
df2c07f4 | 1049 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1050 | .flags = 0, /* OK for unprivileged users. */ |
1051 | .policy = flow_policy, | |
df2c07f4 JP |
1052 | .doit = ovs_flow_cmd_get, |
1053 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1054 | }, |
df2c07f4 | 1055 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1056 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1057 | .policy = flow_policy, | |
df2c07f4 | 1058 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1059 | }, |
1060 | }; | |
1061 | ||
df2c07f4 | 1062 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
df2c07f4 | 1063 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
b063d9f0 | 1064 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
c58cc9a4 | 1065 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, |
d6569377 BP |
1066 | }; |
1067 | ||
aaff4b55 BP |
1068 | static struct genl_family dp_datapath_genl_family = { |
1069 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1070 | .hdrsize = sizeof(struct ovs_header), |
1071 | .name = OVS_DATAPATH_FAMILY, | |
69685a88 | 1072 | .version = OVS_DATAPATH_VERSION, |
2a4999f3 | 1073 | .maxattr = OVS_DP_ATTR_MAX, |
b3dcb73c | 1074 | .netnsok = true, |
14002a59 | 1075 | SET_PARALLEL_OPS |
aaff4b55 BP |
1076 | }; |
1077 | ||
850b6b3b | 1078 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
df2c07f4 | 1079 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1080 | }; |
1081 | ||
0afa2373 TG |
1082 | static size_t ovs_dp_cmd_msg_size(void) |
1083 | { | |
1084 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1085 | ||
1086 | msgsize += nla_total_size(IFNAMSIZ); | |
1087 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
4fa72a95 | 1088 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
300af20a | 1089 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
0afa2373 TG |
1090 | |
1091 | return msgsize; | |
1092 | } | |
1093 | ||
df2c07f4 | 1094 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1095 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1096 | { |
df2c07f4 | 1097 | struct ovs_header *ovs_header; |
e926dfe3 | 1098 | struct ovs_dp_stats dp_stats; |
4fa72a95 | 1099 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
064af421 BP |
1100 | int err; |
1101 | ||
28aea917 | 1102 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1103 | flags, cmd); |
df2c07f4 | 1104 | if (!ovs_header) |
aaff4b55 | 1105 | goto error; |
064af421 | 1106 | |
b063d9f0 | 1107 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1108 | |
d6569377 | 1109 | rcu_read_lock(); |
850b6b3b | 1110 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
d6569377 | 1111 | rcu_read_unlock(); |
064af421 | 1112 | if (err) |
d6569377 | 1113 | goto nla_put_failure; |
064af421 | 1114 | |
4fa72a95 AZ |
1115 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1116 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1117 | &dp_stats)) | |
1118 | goto nla_put_failure; | |
1119 | ||
1120 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1121 | sizeof(struct ovs_dp_megaflow_stats), | |
1122 | &dp_megaflow_stats)) | |
c3cc8c03 | 1123 | goto nla_put_failure; |
d6569377 | 1124 | |
c58cc9a4 TG |
1125 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1126 | goto nla_put_failure; | |
1127 | ||
df2c07f4 | 1128 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1129 | |
1130 | nla_put_failure: | |
df2c07f4 | 1131 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1132 | error: |
1133 | return -EMSGSIZE; | |
d6569377 BP |
1134 | } |
1135 | ||
68eadcf0 TG |
1136 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, |
1137 | struct genl_info *info, u8 cmd) | |
d6569377 | 1138 | { |
d6569377 | 1139 | struct sk_buff *skb; |
aaff4b55 | 1140 | int retval; |
d6569377 | 1141 | |
68eadcf0 | 1142 | skb = genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
064af421 | 1143 | if (!skb) |
d6569377 | 1144 | return ERR_PTR(-ENOMEM); |
659586ef | 1145 | |
68eadcf0 | 1146 | retval = ovs_dp_cmd_fill_info(dp, skb, info->snd_portid, info->snd_seq, 0, cmd); |
aaff4b55 BP |
1147 | if (retval < 0) { |
1148 | kfree_skb(skb); | |
1149 | return ERR_PTR(retval); | |
1150 | } | |
1151 | return skb; | |
1152 | } | |
9dca7bd5 | 1153 | |
cd2a59e9 | 1154 | /* Called with ovs_mutex. */ |
2a4999f3 PS |
1155 | static struct datapath *lookup_datapath(struct net *net, |
1156 | struct ovs_header *ovs_header, | |
6455100f | 1157 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1158 | { |
254f2dc8 BP |
1159 | struct datapath *dp; |
1160 | ||
df2c07f4 | 1161 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1162 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1163 | else { |
d6569377 | 1164 | struct vport *vport; |
d6569377 | 1165 | |
057dd6d2 | 1166 | rcu_read_lock(); |
2a4999f3 | 1167 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1168 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
057dd6d2 | 1169 | rcu_read_unlock(); |
d6569377 | 1170 | } |
254f2dc8 | 1171 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1172 | } |
1173 | ||
94358dcf TG |
1174 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1175 | { | |
1176 | struct datapath *dp; | |
1177 | ||
1178 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
1179 | if (!dp) | |
1180 | return; | |
1181 | ||
1182 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1183 | dp->user_features = 0; | |
1184 | } | |
1185 | ||
c58cc9a4 TG |
1186 | static void ovs_dp_change(struct datapath *dp, struct nlattr **a) |
1187 | { | |
1188 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1189 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1190 | } | |
1191 | ||
df2c07f4 | 1192 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1193 | { |
aaff4b55 | 1194 | struct nlattr **a = info->attrs; |
d6569377 | 1195 | struct vport_parms parms; |
aaff4b55 | 1196 | struct sk_buff *reply; |
d6569377 BP |
1197 | struct datapath *dp; |
1198 | struct vport *vport; | |
2a4999f3 | 1199 | struct ovs_net *ovs_net; |
95b1d73a | 1200 | int err, i; |
d6569377 | 1201 | |
d6569377 | 1202 | err = -EINVAL; |
ea36840f | 1203 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1204 | goto err; |
1205 | ||
cd2a59e9 | 1206 | ovs_lock(); |
d6569377 | 1207 | |
d6569377 BP |
1208 | err = -ENOMEM; |
1209 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1210 | if (dp == NULL) | |
cd2a59e9 | 1211 | goto err_unlock_ovs; |
2a4999f3 | 1212 | |
0ceaa66c JG |
1213 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
1214 | ||
d6569377 | 1215 | /* Allocate table. */ |
994dc286 PS |
1216 | err = ovs_flow_tbl_init(&dp->table); |
1217 | if (err) | |
d6569377 BP |
1218 | goto err_free_dp; |
1219 | ||
99769a40 JG |
1220 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); |
1221 | if (!dp->stats_percpu) { | |
1222 | err = -ENOMEM; | |
1223 | goto err_destroy_table; | |
1224 | } | |
1225 | ||
95b1d73a PS |
1226 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1227 | GFP_KERNEL); | |
1228 | if (!dp->ports) { | |
1229 | err = -ENOMEM; | |
1230 | goto err_destroy_percpu; | |
1231 | } | |
1232 | ||
1233 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1234 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1235 | ||
d6569377 | 1236 | /* Set up our datapath device. */ |
df2c07f4 JP |
1237 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1238 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1239 | parms.options = NULL; |
1240 | parms.dp = dp; | |
df2c07f4 | 1241 | parms.port_no = OVSP_LOCAL; |
28aea917 | 1242 | parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
b063d9f0 | 1243 | |
c58cc9a4 TG |
1244 | ovs_dp_change(dp, a); |
1245 | ||
d6569377 BP |
1246 | vport = new_vport(&parms); |
1247 | if (IS_ERR(vport)) { | |
1248 | err = PTR_ERR(vport); | |
1249 | if (err == -EBUSY) | |
1250 | err = -EEXIST; | |
1251 | ||
94358dcf TG |
1252 | if (err == -EEXIST) { |
1253 | /* An outdated user space instance that does not understand | |
1254 | * the concept of user_features has attempted to create a new | |
1255 | * datapath and is likely to reuse it. Drop all user features. | |
1256 | */ | |
1257 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1258 | ovs_dp_reset_user_features(skb, info); | |
1259 | } | |
1260 | ||
95b1d73a | 1261 | goto err_destroy_ports_array; |
d6569377 | 1262 | } |
d6569377 | 1263 | |
68eadcf0 | 1264 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1265 | err = PTR_ERR(reply); |
1266 | if (IS_ERR(reply)) | |
1267 | goto err_destroy_local_port; | |
1268 | ||
2a4999f3 | 1269 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1270 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
d6569377 | 1271 | |
cd2a59e9 | 1272 | ovs_unlock(); |
d6569377 | 1273 | |
e297c6b7 | 1274 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
d6569377 BP |
1275 | return 0; |
1276 | ||
1277 | err_destroy_local_port: | |
cd2a59e9 | 1278 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
95b1d73a PS |
1279 | err_destroy_ports_array: |
1280 | kfree(dp->ports); | |
99769a40 JG |
1281 | err_destroy_percpu: |
1282 | free_percpu(dp->stats_percpu); | |
d6569377 | 1283 | err_destroy_table: |
d103f479 | 1284 | ovs_flow_tbl_destroy(&dp->table, false); |
d6569377 | 1285 | err_free_dp: |
0ceaa66c | 1286 | release_net(ovs_dp_get_net(dp)); |
d6569377 | 1287 | kfree(dp); |
cd2a59e9 PS |
1288 | err_unlock_ovs: |
1289 | ovs_unlock(); | |
d6569377 | 1290 | err: |
064af421 BP |
1291 | return err; |
1292 | } | |
1293 | ||
cd2a59e9 | 1294 | /* Called with ovs_mutex. */ |
2a4999f3 | 1295 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1296 | { |
95b1d73a | 1297 | int i; |
44e05eca | 1298 | |
95b1d73a PS |
1299 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1300 | struct vport *vport; | |
f8dfbcb7 | 1301 | struct hlist_node *n; |
95b1d73a | 1302 | |
f8dfbcb7 | 1303 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1304 | if (vport->port_no != OVSP_LOCAL) |
1305 | ovs_dp_detach_port(vport); | |
1306 | } | |
ed099e92 | 1307 | |
fb93e9aa | 1308 | list_del_rcu(&dp->list_node); |
ed099e92 | 1309 | |
cd2a59e9 | 1310 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
d103f479 AZ |
1311 | * all ports in datapath are destroyed first before freeing datapath. |
1312 | */ | |
cd2a59e9 | 1313 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
99620d2c | 1314 | |
d103f479 AZ |
1315 | /* RCU destroy the flow table */ |
1316 | ovs_flow_tbl_destroy(&dp->table, true); | |
1317 | ||
ed099e92 | 1318 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1319 | } |
1320 | ||
1321 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1322 | { | |
1323 | struct sk_buff *reply; | |
1324 | struct datapath *dp; | |
1325 | int err; | |
1326 | ||
cd2a59e9 | 1327 | ovs_lock(); |
2a4999f3 PS |
1328 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1329 | err = PTR_ERR(dp); | |
1330 | if (IS_ERR(dp)) | |
cd2a59e9 | 1331 | goto unlock; |
2a4999f3 | 1332 | |
68eadcf0 | 1333 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_DEL); |
2a4999f3 PS |
1334 | err = PTR_ERR(reply); |
1335 | if (IS_ERR(reply)) | |
cd2a59e9 | 1336 | goto unlock; |
2a4999f3 PS |
1337 | |
1338 | __dp_destroy(dp); | |
cd2a59e9 | 1339 | ovs_unlock(); |
ed099e92 | 1340 | |
e297c6b7 | 1341 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
99620d2c JG |
1342 | |
1343 | return 0; | |
cd2a59e9 PS |
1344 | unlock: |
1345 | ovs_unlock(); | |
1346 | return err; | |
44e05eca BP |
1347 | } |
1348 | ||
df2c07f4 | 1349 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1350 | { |
aaff4b55 | 1351 | struct sk_buff *reply; |
d6569377 | 1352 | struct datapath *dp; |
d6569377 | 1353 | int err; |
064af421 | 1354 | |
cd2a59e9 | 1355 | ovs_lock(); |
2a4999f3 | 1356 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1357 | err = PTR_ERR(dp); |
d6569377 | 1358 | if (IS_ERR(dp)) |
cd2a59e9 | 1359 | goto unlock; |
38c6ecbc | 1360 | |
c58cc9a4 TG |
1361 | ovs_dp_change(dp, info->attrs); |
1362 | ||
68eadcf0 | 1363 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1364 | if (IS_ERR(reply)) { |
1365 | err = PTR_ERR(reply); | |
b3dcb73c | 1366 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, |
850b6b3b | 1367 | ovs_dp_datapath_multicast_group.id, err); |
cd2a59e9 PS |
1368 | err = 0; |
1369 | goto unlock; | |
aaff4b55 BP |
1370 | } |
1371 | ||
cd2a59e9 | 1372 | ovs_unlock(); |
e297c6b7 | 1373 | ovs_notify(reply, info, &ovs_dp_datapath_multicast_group); |
850b6b3b | 1374 | |
aaff4b55 | 1375 | return 0; |
cd2a59e9 PS |
1376 | unlock: |
1377 | ovs_unlock(); | |
1378 | return err; | |
064af421 BP |
1379 | } |
1380 | ||
df2c07f4 | 1381 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1382 | { |
aaff4b55 | 1383 | struct sk_buff *reply; |
d6569377 | 1384 | struct datapath *dp; |
d6569377 | 1385 | int err; |
1dcf111b | 1386 | |
cd2a59e9 | 1387 | ovs_lock(); |
2a4999f3 | 1388 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1389 | if (IS_ERR(dp)) { |
1390 | err = PTR_ERR(dp); | |
1391 | goto unlock; | |
1392 | } | |
1dcf111b | 1393 | |
68eadcf0 | 1394 | reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW); |
cd2a59e9 PS |
1395 | if (IS_ERR(reply)) { |
1396 | err = PTR_ERR(reply); | |
1397 | goto unlock; | |
1398 | } | |
aaff4b55 | 1399 | |
cd2a59e9 | 1400 | ovs_unlock(); |
aaff4b55 | 1401 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1402 | |
1403 | unlock: | |
1404 | ovs_unlock(); | |
1405 | return err; | |
1dcf111b JP |
1406 | } |
1407 | ||
df2c07f4 | 1408 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1409 | { |
2a4999f3 | 1410 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1411 | struct datapath *dp; |
1412 | int skip = cb->args[0]; | |
1413 | int i = 0; | |
a7786963 | 1414 | |
fb93e9aa PS |
1415 | rcu_read_lock(); |
1416 | list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1417 | if (i >= skip && |
28aea917 | 1418 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1419 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1420 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1421 | break; |
254f2dc8 | 1422 | i++; |
a7786963 | 1423 | } |
fb93e9aa | 1424 | rcu_read_unlock(); |
aaff4b55 | 1425 | |
254f2dc8 BP |
1426 | cb->args[0] = i; |
1427 | ||
aaff4b55 | 1428 | return skb->len; |
c19e6535 BP |
1429 | } |
1430 | ||
aaff4b55 | 1431 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1432 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1433 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1434 | .policy = datapath_policy, | |
df2c07f4 | 1435 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1436 | }, |
df2c07f4 | 1437 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1438 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1439 | .policy = datapath_policy, | |
df2c07f4 | 1440 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1441 | }, |
df2c07f4 | 1442 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1443 | .flags = 0, /* OK for unprivileged users. */ |
1444 | .policy = datapath_policy, | |
df2c07f4 JP |
1445 | .doit = ovs_dp_cmd_get, |
1446 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1447 | }, |
df2c07f4 | 1448 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1449 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1450 | .policy = datapath_policy, | |
df2c07f4 | 1451 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1452 | }, |
1453 | }; | |
1454 | ||
df2c07f4 | 1455 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
df2c07f4 | 1456 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1457 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
d48c88ec JG |
1458 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1459 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1460 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1461 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1462 | }; |
1463 | ||
f0fef760 BP |
1464 | static struct genl_family dp_vport_genl_family = { |
1465 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1466 | .hdrsize = sizeof(struct ovs_header), |
1467 | .name = OVS_VPORT_FAMILY, | |
69685a88 | 1468 | .version = OVS_VPORT_VERSION, |
2a4999f3 | 1469 | .maxattr = OVS_VPORT_ATTR_MAX, |
b3dcb73c | 1470 | .netnsok = true, |
14002a59 | 1471 | SET_PARALLEL_OPS |
f0fef760 BP |
1472 | }; |
1473 | ||
850b6b3b | 1474 | struct genl_multicast_group ovs_dp_vport_multicast_group = { |
df2c07f4 | 1475 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1476 | }; |
1477 | ||
cd2a59e9 | 1478 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1479 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1480 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1481 | { |
df2c07f4 | 1482 | struct ovs_header *ovs_header; |
e926dfe3 | 1483 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1484 | int err; |
1485 | ||
28aea917 | 1486 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1487 | flags, cmd); |
df2c07f4 | 1488 | if (!ovs_header) |
f0fef760 | 1489 | return -EMSGSIZE; |
c19e6535 | 1490 | |
99769a40 | 1491 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1492 | |
c3cc8c03 DM |
1493 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1494 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
1495 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || | |
28aea917 | 1496 | nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid)) |
c3cc8c03 | 1497 | goto nla_put_failure; |
c19e6535 | 1498 | |
850b6b3b | 1499 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1500 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1501 | &vport_stats)) | |
1502 | goto nla_put_failure; | |
c19e6535 | 1503 | |
850b6b3b | 1504 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1505 | if (err == -EMSGSIZE) |
1506 | goto error; | |
c19e6535 | 1507 | |
df2c07f4 | 1508 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1509 | |
1510 | nla_put_failure: | |
1511 | err = -EMSGSIZE; | |
f0fef760 | 1512 | error: |
df2c07f4 | 1513 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1514 | return err; |
064af421 BP |
1515 | } |
1516 | ||
cd2a59e9 | 1517 | /* Called with ovs_mutex or RCU read lock. */ |
28aea917 | 1518 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 1519 | u32 seq, u8 cmd) |
064af421 | 1520 | { |
c19e6535 | 1521 | struct sk_buff *skb; |
f0fef760 | 1522 | int retval; |
c19e6535 | 1523 | |
f0fef760 | 1524 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1525 | if (!skb) |
1526 | return ERR_PTR(-ENOMEM); | |
1527 | ||
28aea917 | 1528 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
1529 | BUG_ON(retval < 0); |
1530 | ||
c19e6535 | 1531 | return skb; |
f0fef760 | 1532 | } |
c19e6535 | 1533 | |
cd2a59e9 | 1534 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 PS |
1535 | static struct vport *lookup_vport(struct net *net, |
1536 | struct ovs_header *ovs_header, | |
df2c07f4 | 1537 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1538 | { |
1539 | struct datapath *dp; | |
1540 | struct vport *vport; | |
1541 | ||
df2c07f4 | 1542 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1543 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1544 | if (!vport) |
c19e6535 | 1545 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1546 | if (ovs_header->dp_ifindex && |
1547 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1548 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1549 | return vport; |
df2c07f4 JP |
1550 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1551 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1552 | |
1553 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1554 | return ERR_PTR(-EFBIG); |
c19e6535 | 1555 | |
2a4999f3 | 1556 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1557 | if (!dp) |
1558 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1559 | |
cd2a59e9 | 1560 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 1561 | if (!vport) |
17535c57 | 1562 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1563 | return vport; |
1564 | } else | |
1565 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1566 | } |
1567 | ||
df2c07f4 | 1568 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1569 | { |
f0fef760 | 1570 | struct nlattr **a = info->attrs; |
df2c07f4 | 1571 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1572 | struct vport_parms parms; |
ed099e92 | 1573 | struct sk_buff *reply; |
c19e6535 | 1574 | struct vport *vport; |
c19e6535 | 1575 | struct datapath *dp; |
b0ec0f27 | 1576 | u32 port_no; |
c19e6535 | 1577 | int err; |
b0ec0f27 | 1578 | |
c19e6535 | 1579 | err = -EINVAL; |
ea36840f BP |
1580 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1581 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
f0fef760 BP |
1582 | goto exit; |
1583 | ||
cd2a59e9 | 1584 | ovs_lock(); |
2a4999f3 | 1585 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1586 | err = -ENODEV; |
1587 | if (!dp) | |
ed099e92 | 1588 | goto exit_unlock; |
c19e6535 | 1589 | |
df2c07f4 JP |
1590 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1591 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1592 | |
1593 | err = -EFBIG; | |
1594 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 1595 | goto exit_unlock; |
c19e6535 | 1596 | |
cd2a59e9 | 1597 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1598 | err = -EBUSY; |
1599 | if (vport) | |
ed099e92 | 1600 | goto exit_unlock; |
c19e6535 BP |
1601 | } else { |
1602 | for (port_no = 1; ; port_no++) { | |
1603 | if (port_no >= DP_MAX_PORTS) { | |
1604 | err = -EFBIG; | |
ed099e92 | 1605 | goto exit_unlock; |
c19e6535 | 1606 | } |
cd2a59e9 | 1607 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1608 | if (!vport) |
1609 | break; | |
51d4d598 | 1610 | } |
064af421 | 1611 | } |
b0ec0f27 | 1612 | |
df2c07f4 JP |
1613 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1614 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1615 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1616 | parms.dp = dp; |
1617 | parms.port_no = port_no; | |
28aea917 | 1618 | parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 BP |
1619 | |
1620 | vport = new_vport(&parms); | |
1621 | err = PTR_ERR(vport); | |
1622 | if (IS_ERR(vport)) | |
ed099e92 | 1623 | goto exit_unlock; |
c19e6535 | 1624 | |
faef6d2d | 1625 | err = 0; |
1fc7083d JG |
1626 | if (a[OVS_VPORT_ATTR_STATS]) |
1627 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
1628 | ||
1629 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, | |
1630 | OVS_VPORT_CMD_NEW); | |
1631 | if (IS_ERR(reply)) { | |
1632 | err = PTR_ERR(reply); | |
850b6b3b | 1633 | ovs_dp_detach_port(vport); |
ed099e92 | 1634 | goto exit_unlock; |
c19e6535 | 1635 | } |
e297c6b7 TG |
1636 | |
1637 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); | |
c19e6535 | 1638 | |
ed099e92 | 1639 | exit_unlock: |
cd2a59e9 | 1640 | ovs_unlock(); |
c19e6535 BP |
1641 | exit: |
1642 | return err; | |
44e05eca BP |
1643 | } |
1644 | ||
df2c07f4 | 1645 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1646 | { |
f0fef760 BP |
1647 | struct nlattr **a = info->attrs; |
1648 | struct sk_buff *reply; | |
c19e6535 | 1649 | struct vport *vport; |
c19e6535 | 1650 | int err; |
44e05eca | 1651 | |
cd2a59e9 | 1652 | ovs_lock(); |
2a4999f3 | 1653 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
1654 | err = PTR_ERR(vport); |
1655 | if (IS_ERR(vport)) | |
f0fef760 | 1656 | goto exit_unlock; |
44e05eca | 1657 | |
6455100f | 1658 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 1659 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 1660 | err = -EINVAL; |
17ec1d04 JG |
1661 | goto exit_unlock; |
1662 | } | |
6455100f | 1663 | |
c25ea534 JG |
1664 | reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1665 | if (!reply) { | |
1666 | err = -ENOMEM; | |
1667 | goto exit_unlock; | |
1668 | } | |
1669 | ||
17ec1d04 | 1670 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 1671 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 JG |
1672 | if (err) |
1673 | goto exit_free; | |
1674 | } | |
1fc7083d JG |
1675 | |
1676 | if (a[OVS_VPORT_ATTR_STATS]) | |
1677 | ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); | |
1678 | ||
1679 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) | |
28aea917 | 1680 | vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 | 1681 | |
c25ea534 JG |
1682 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1683 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1684 | BUG_ON(err < 0); | |
f0fef760 | 1685 | |
cd2a59e9 | 1686 | ovs_unlock(); |
8680ae4d | 1687 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
c25ea534 JG |
1688 | return 0; |
1689 | ||
1690 | exit_free: | |
1691 | kfree_skb(reply); | |
f0fef760 | 1692 | exit_unlock: |
cd2a59e9 | 1693 | ovs_unlock(); |
c19e6535 | 1694 | return err; |
064af421 BP |
1695 | } |
1696 | ||
df2c07f4 | 1697 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1698 | { |
f0fef760 BP |
1699 | struct nlattr **a = info->attrs; |
1700 | struct sk_buff *reply; | |
c19e6535 | 1701 | struct vport *vport; |
c19e6535 BP |
1702 | int err; |
1703 | ||
cd2a59e9 | 1704 | ovs_lock(); |
2a4999f3 | 1705 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 1706 | err = PTR_ERR(vport); |
f0fef760 BP |
1707 | if (IS_ERR(vport)) |
1708 | goto exit_unlock; | |
c19e6535 | 1709 | |
df2c07f4 | 1710 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
1711 | err = -EINVAL; |
1712 | goto exit_unlock; | |
1713 | } | |
1714 | ||
28aea917 IY |
1715 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
1716 | info->snd_seq, OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
1717 | err = PTR_ERR(reply); |
1718 | if (IS_ERR(reply)) | |
1719 | goto exit_unlock; | |
1720 | ||
b57d5819 | 1721 | err = 0; |
850b6b3b | 1722 | ovs_dp_detach_port(vport); |
f0fef760 | 1723 | |
e297c6b7 | 1724 | ovs_notify(reply, info, &ovs_dp_vport_multicast_group); |
f0fef760 BP |
1725 | |
1726 | exit_unlock: | |
cd2a59e9 | 1727 | ovs_unlock(); |
c19e6535 | 1728 | return err; |
7c40efc9 BP |
1729 | } |
1730 | ||
df2c07f4 | 1731 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1732 | { |
f0fef760 | 1733 | struct nlattr **a = info->attrs; |
df2c07f4 | 1734 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 1735 | struct sk_buff *reply; |
c19e6535 | 1736 | struct vport *vport; |
c19e6535 BP |
1737 | int err; |
1738 | ||
ed099e92 | 1739 | rcu_read_lock(); |
2a4999f3 | 1740 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
1741 | err = PTR_ERR(vport); |
1742 | if (IS_ERR(vport)) | |
f0fef760 | 1743 | goto exit_unlock; |
c19e6535 | 1744 | |
28aea917 IY |
1745 | reply = ovs_vport_cmd_build_info(vport, info->snd_portid, |
1746 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
1747 | err = PTR_ERR(reply); |
1748 | if (IS_ERR(reply)) | |
f0fef760 | 1749 | goto exit_unlock; |
ed099e92 | 1750 | |
df2fa9b5 JG |
1751 | rcu_read_unlock(); |
1752 | ||
1753 | return genlmsg_reply(reply, info); | |
ed099e92 | 1754 | |
f0fef760 | 1755 | exit_unlock: |
ed099e92 | 1756 | rcu_read_unlock(); |
c19e6535 BP |
1757 | return err; |
1758 | } | |
1759 | ||
df2c07f4 | 1760 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 1761 | { |
df2c07f4 | 1762 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 1763 | struct datapath *dp; |
95b1d73a PS |
1764 | int bucket = cb->args[0], skip = cb->args[1]; |
1765 | int i, j = 0; | |
c19e6535 | 1766 | |
2a4999f3 | 1767 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 | 1768 | if (!dp) |
f0fef760 | 1769 | return -ENODEV; |
ed099e92 BP |
1770 | |
1771 | rcu_read_lock(); | |
95b1d73a | 1772 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 1773 | struct vport *vport; |
95b1d73a PS |
1774 | |
1775 | j = 0; | |
f8dfbcb7 | 1776 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
1777 | if (j >= skip && |
1778 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 1779 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
1780 | cb->nlh->nlmsg_seq, |
1781 | NLM_F_MULTI, | |
1782 | OVS_VPORT_CMD_NEW) < 0) | |
1783 | goto out; | |
1784 | ||
1785 | j++; | |
1786 | } | |
1787 | skip = 0; | |
c19e6535 | 1788 | } |
95b1d73a | 1789 | out: |
ed099e92 | 1790 | rcu_read_unlock(); |
c19e6535 | 1791 | |
95b1d73a PS |
1792 | cb->args[0] = i; |
1793 | cb->args[1] = j; | |
f0fef760 | 1794 | |
95b1d73a | 1795 | return skb->len; |
7c40efc9 BP |
1796 | } |
1797 | ||
f0fef760 | 1798 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 1799 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
1800 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1801 | .policy = vport_policy, | |
df2c07f4 | 1802 | .doit = ovs_vport_cmd_new |
f0fef760 | 1803 | }, |
df2c07f4 | 1804 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
1805 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1806 | .policy = vport_policy, | |
df2c07f4 | 1807 | .doit = ovs_vport_cmd_del |
f0fef760 | 1808 | }, |
df2c07f4 | 1809 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
1810 | .flags = 0, /* OK for unprivileged users. */ |
1811 | .policy = vport_policy, | |
df2c07f4 JP |
1812 | .doit = ovs_vport_cmd_get, |
1813 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 1814 | }, |
df2c07f4 | 1815 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
1816 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1817 | .policy = vport_policy, | |
df2c07f4 | 1818 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
1819 | }, |
1820 | }; | |
1821 | ||
982b8810 BP |
1822 | struct genl_family_and_ops { |
1823 | struct genl_family *family; | |
1824 | struct genl_ops *ops; | |
1825 | int n_ops; | |
1826 | struct genl_multicast_group *group; | |
1827 | }; | |
ed099e92 | 1828 | |
982b8810 | 1829 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
1830 | { &dp_datapath_genl_family, |
1831 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
850b6b3b | 1832 | &ovs_dp_datapath_multicast_group }, |
f0fef760 BP |
1833 | { &dp_vport_genl_family, |
1834 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
850b6b3b | 1835 | &ovs_dp_vport_multicast_group }, |
37a1300c BP |
1836 | { &dp_flow_genl_family, |
1837 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
850b6b3b | 1838 | &ovs_dp_flow_multicast_group }, |
982b8810 BP |
1839 | { &dp_packet_genl_family, |
1840 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
1841 | NULL }, | |
1842 | }; | |
ed099e92 | 1843 | |
982b8810 BP |
1844 | static void dp_unregister_genl(int n_families) |
1845 | { | |
1846 | int i; | |
ed099e92 | 1847 | |
b867ca75 | 1848 | for (i = 0; i < n_families; i++) |
982b8810 | 1849 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
1850 | } |
1851 | ||
982b8810 | 1852 | static int dp_register_genl(void) |
064af421 | 1853 | { |
982b8810 BP |
1854 | int n_registered; |
1855 | int err; | |
1856 | int i; | |
064af421 | 1857 | |
982b8810 BP |
1858 | n_registered = 0; |
1859 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
1860 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 1861 | |
982b8810 BP |
1862 | err = genl_register_family_with_ops(f->family, f->ops, |
1863 | f->n_ops); | |
1864 | if (err) | |
1865 | goto error; | |
1866 | n_registered++; | |
e22d4953 | 1867 | |
982b8810 BP |
1868 | if (f->group) { |
1869 | err = genl_register_mc_group(f->family, f->group); | |
1870 | if (err) | |
1871 | goto error; | |
1872 | } | |
1873 | } | |
9cc8b4e4 | 1874 | |
982b8810 | 1875 | return 0; |
064af421 BP |
1876 | |
1877 | error: | |
982b8810 BP |
1878 | dp_unregister_genl(n_registered); |
1879 | return err; | |
064af421 BP |
1880 | } |
1881 | ||
2a4999f3 PS |
1882 | static int __net_init ovs_init_net(struct net *net) |
1883 | { | |
1884 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
1885 | ||
1886 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 1887 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
2a4999f3 PS |
1888 | return 0; |
1889 | } | |
1890 | ||
1891 | static void __net_exit ovs_exit_net(struct net *net) | |
1892 | { | |
cd2a59e9 | 1893 | struct datapath *dp, *dp_next; |
2a4999f3 PS |
1894 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
1895 | ||
cd2a59e9 PS |
1896 | ovs_lock(); |
1897 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
1898 | __dp_destroy(dp); | |
1899 | ovs_unlock(); | |
1900 | ||
1901 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
1902 | } |
1903 | ||
1904 | static struct pernet_operations ovs_net_ops = { | |
1905 | .init = ovs_init_net, | |
1906 | .exit = ovs_exit_net, | |
1907 | .id = &ovs_net_id, | |
1908 | .size = sizeof(struct ovs_net), | |
1909 | }; | |
1910 | ||
637c8268 PS |
1911 | DEFINE_COMPAT_PNET_REG_FUNC(device); |
1912 | ||
22d24ebf BP |
1913 | static int __init dp_init(void) |
1914 | { | |
1915 | int err; | |
1916 | ||
f3d85db3 | 1917 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 1918 | |
dc5f3fef | 1919 | pr_info("Open vSwitch switching datapath %s, built "__DATE__" "__TIME__"\n", |
8a07709c | 1920 | VERSION); |
064af421 | 1921 | |
850b6b3b | 1922 | err = ovs_flow_init(); |
3544358a | 1923 | if (err) |
533e96e7 | 1924 | goto error; |
3544358a | 1925 | |
850b6b3b | 1926 | err = ovs_vport_init(); |
064af421 BP |
1927 | if (err) |
1928 | goto error_flow_exit; | |
1929 | ||
2a4999f3 | 1930 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
1931 | if (err) |
1932 | goto error_vport_exit; | |
1933 | ||
2a4999f3 PS |
1934 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
1935 | if (err) | |
1936 | goto error_netns_exit; | |
1937 | ||
982b8810 BP |
1938 | err = dp_register_genl(); |
1939 | if (err < 0) | |
37a1300c | 1940 | goto error_unreg_notifier; |
982b8810 | 1941 | |
064af421 BP |
1942 | return 0; |
1943 | ||
1944 | error_unreg_notifier: | |
850b6b3b | 1945 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
1946 | error_netns_exit: |
1947 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 1948 | error_vport_exit: |
850b6b3b | 1949 | ovs_vport_exit(); |
064af421 | 1950 | error_flow_exit: |
850b6b3b | 1951 | ovs_flow_exit(); |
064af421 BP |
1952 | error: |
1953 | return err; | |
1954 | } | |
1955 | ||
1956 | static void dp_cleanup(void) | |
1957 | { | |
982b8810 | 1958 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
850b6b3b | 1959 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
1960 | unregister_pernet_device(&ovs_net_ops); |
1961 | rcu_barrier(); | |
850b6b3b JG |
1962 | ovs_vport_exit(); |
1963 | ovs_flow_exit(); | |
064af421 BP |
1964 | } |
1965 | ||
1966 | module_init(dp_init); | |
1967 | module_exit(dp_cleanup); | |
1968 | ||
1969 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
1970 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 1971 | MODULE_VERSION(VERSION); |