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ccb1352e | 1 | /* |
ad552007 | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
ccb1352e JG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
20 | ||
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/if_arp.h> | |
24 | #include <linux/if_vlan.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
27 | #include <linux/jhash.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
31 | #include <linux/genetlink.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/kthread.h> | |
34 | #include <linux/mutex.h> | |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
ccb1352e JG |
39 | #include <linux/ethtool.h> |
40 | #include <linux/wait.h> | |
ccb1352e JG |
41 | #include <asm/div64.h> |
42 | #include <linux/highmem.h> | |
43 | #include <linux/netfilter_bridge.h> | |
44 | #include <linux/netfilter_ipv4.h> | |
45 | #include <linux/inetdevice.h> | |
46 | #include <linux/list.h> | |
47 | #include <linux/openvswitch.h> | |
48 | #include <linux/rculist.h> | |
49 | #include <linux/dmi.h> | |
ccb1352e | 50 | #include <net/genetlink.h> |
46df7b81 PS |
51 | #include <net/net_namespace.h> |
52 | #include <net/netns/generic.h> | |
ccb1352e JG |
53 | |
54 | #include "datapath.h" | |
55 | #include "flow.h" | |
e80857cc | 56 | #include "flow_table.h" |
e6445719 | 57 | #include "flow_netlink.h" |
ccb1352e | 58 | #include "vport-internal_dev.h" |
cff63a52 | 59 | #include "vport-netdev.h" |
ccb1352e | 60 | |
c7d03a00 | 61 | unsigned int ovs_net_id __read_mostly; |
8e4e1713 | 62 | |
0c200ef9 PS |
63 | static struct genl_family dp_packet_genl_family; |
64 | static struct genl_family dp_flow_genl_family; | |
65 | static struct genl_family dp_datapath_genl_family; | |
66 | ||
74ed7ab9 JS |
67 | static const struct nla_policy flow_policy[]; |
68 | ||
48e48a70 | 69 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
70 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
71 | }; |
72 | ||
48e48a70 | 73 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
74 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
75 | }; |
76 | ||
48e48a70 | 77 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
78 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
79 | }; |
80 | ||
fb5d1e9e JR |
81 | /* Check if need to build a reply message. |
82 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
83 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
84 | unsigned int group) | |
fb5d1e9e JR |
85 | { |
86 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
f8403a2e | 87 | genl_has_listeners(family, genl_info_net(info), group); |
fb5d1e9e JR |
88 | } |
89 | ||
68eb5503 | 90 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 91 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 92 | { |
92c14d9b | 93 | genl_notify(family, skb, info, 0, GFP_KERNEL); |
ed661185 TG |
94 | } |
95 | ||
ccb1352e JG |
96 | /** |
97 | * DOC: Locking: | |
98 | * | |
8e4e1713 PS |
99 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
100 | * operations on vports, etc.), Writes to other state (flow table | |
101 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
102 | * by ovs_lock. | |
ccb1352e JG |
103 | * |
104 | * Reads are protected by RCU. | |
105 | * | |
106 | * There are a few special cases (mostly stats) that have their own | |
107 | * synchronization but they nest under all of above and don't interact with | |
108 | * each other. | |
8e4e1713 PS |
109 | * |
110 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
111 | */ |
112 | ||
8e4e1713 PS |
113 | static DEFINE_MUTEX(ovs_mutex); |
114 | ||
115 | void ovs_lock(void) | |
116 | { | |
117 | mutex_lock(&ovs_mutex); | |
118 | } | |
119 | ||
120 | void ovs_unlock(void) | |
121 | { | |
122 | mutex_unlock(&ovs_mutex); | |
123 | } | |
124 | ||
125 | #ifdef CONFIG_LOCKDEP | |
126 | int lockdep_ovsl_is_held(void) | |
127 | { | |
128 | if (debug_locks) | |
129 | return lockdep_is_held(&ovs_mutex); | |
130 | else | |
131 | return 1; | |
132 | } | |
133 | #endif | |
134 | ||
ccb1352e | 135 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 136 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 137 | const struct sw_flow_key *, |
f2a4d086 WT |
138 | const struct dp_upcall_info *, |
139 | uint32_t cutlen); | |
8055a89c | 140 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 141 | const struct sw_flow_key *, |
f2a4d086 WT |
142 | const struct dp_upcall_info *, |
143 | uint32_t cutlen); | |
ccb1352e | 144 | |
cc3a5ae6 AZ |
145 | /* Must be called with rcu_read_lock. */ |
146 | static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex) | |
ccb1352e | 147 | { |
cc3a5ae6 | 148 | struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex); |
ccb1352e | 149 | |
ccb1352e JG |
150 | if (dev) { |
151 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
152 | if (vport) | |
cc3a5ae6 | 153 | return vport->dp; |
ccb1352e | 154 | } |
cc3a5ae6 AZ |
155 | |
156 | return NULL; | |
157 | } | |
158 | ||
159 | /* The caller must hold either ovs_mutex or rcu_read_lock to keep the | |
160 | * returned dp pointer valid. | |
161 | */ | |
162 | static inline struct datapath *get_dp(struct net *net, int dp_ifindex) | |
163 | { | |
164 | struct datapath *dp; | |
165 | ||
166 | WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); | |
167 | rcu_read_lock(); | |
168 | dp = get_dp_rcu(net, dp_ifindex); | |
ccb1352e JG |
169 | rcu_read_unlock(); |
170 | ||
171 | return dp; | |
172 | } | |
173 | ||
8e4e1713 | 174 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 175 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 176 | { |
8e4e1713 | 177 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
c9db965c | 178 | return ovs_vport_name(vport); |
ccb1352e JG |
179 | } |
180 | ||
12eb18f7 | 181 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
182 | { |
183 | struct vport *local; | |
184 | int ifindex; | |
185 | ||
186 | rcu_read_lock(); | |
187 | ||
15eac2a7 | 188 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 189 | if (local) |
be4ace6e | 190 | ifindex = local->dev->ifindex; |
ccb1352e JG |
191 | else |
192 | ifindex = 0; | |
193 | ||
194 | rcu_read_unlock(); | |
195 | ||
196 | return ifindex; | |
197 | } | |
198 | ||
199 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
200 | { | |
201 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
202 | ||
9b996e54 | 203 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 204 | free_percpu(dp->stats_percpu); |
15eac2a7 | 205 | kfree(dp->ports); |
ccb1352e JG |
206 | kfree(dp); |
207 | } | |
208 | ||
15eac2a7 PS |
209 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
210 | u16 port_no) | |
211 | { | |
212 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
213 | } | |
214 | ||
bb6f9a70 | 215 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
216 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
217 | { | |
218 | struct vport *vport; | |
15eac2a7 PS |
219 | struct hlist_head *head; |
220 | ||
221 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 222 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
223 | if (vport->port_no == port_no) |
224 | return vport; | |
225 | } | |
226 | return NULL; | |
227 | } | |
228 | ||
8e4e1713 | 229 | /* Called with ovs_mutex. */ |
ccb1352e JG |
230 | static struct vport *new_vport(const struct vport_parms *parms) |
231 | { | |
232 | struct vport *vport; | |
233 | ||
234 | vport = ovs_vport_add(parms); | |
235 | if (!IS_ERR(vport)) { | |
236 | struct datapath *dp = parms->dp; | |
15eac2a7 | 237 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 238 | |
15eac2a7 | 239 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 240 | } |
ccb1352e JG |
241 | return vport; |
242 | } | |
243 | ||
ccb1352e JG |
244 | void ovs_dp_detach_port(struct vport *p) |
245 | { | |
8e4e1713 | 246 | ASSERT_OVSL(); |
ccb1352e JG |
247 | |
248 | /* First drop references to device. */ | |
15eac2a7 | 249 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
250 | |
251 | /* Then destroy it. */ | |
252 | ovs_vport_del(p); | |
253 | } | |
254 | ||
255 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 256 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 257 | { |
83c8df26 | 258 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
259 | struct datapath *dp = p->dp; |
260 | struct sw_flow *flow; | |
d98612b8 | 261 | struct sw_flow_actions *sf_acts; |
ccb1352e | 262 | struct dp_stats_percpu *stats; |
ccb1352e | 263 | u64 *stats_counter; |
1bd7116f | 264 | u32 n_mask_hit; |
ccb1352e | 265 | |
404f2f10 | 266 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 267 | |
ccb1352e | 268 | /* Look up flow. */ |
8c8b1b83 | 269 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit); |
ccb1352e JG |
270 | if (unlikely(!flow)) { |
271 | struct dp_upcall_info upcall; | |
8c8b1b83 | 272 | int error; |
ccb1352e | 273 | |
ccea7445 | 274 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 275 | upcall.cmd = OVS_PACKET_CMD_MISS; |
5cd667b0 | 276 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
7f8a436e | 277 | upcall.mru = OVS_CB(skb)->mru; |
f2a4d086 | 278 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
c5eba0b6 LR |
279 | if (unlikely(error)) |
280 | kfree_skb(skb); | |
281 | else | |
282 | consume_skb(skb); | |
ccb1352e JG |
283 | stats_counter = &stats->n_missed; |
284 | goto out; | |
285 | } | |
286 | ||
d98612b8 LJ |
287 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
288 | sf_acts = rcu_dereference(flow->sf_acts); | |
289 | ovs_execute_actions(dp, skb, sf_acts, key); | |
ccb1352e | 290 | |
e298e505 | 291 | stats_counter = &stats->n_hit; |
ccb1352e JG |
292 | |
293 | out: | |
294 | /* Update datapath statistics. */ | |
df9d9fdf | 295 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 296 | (*stats_counter)++; |
1bd7116f | 297 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 298 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
299 | } |
300 | ||
ccb1352e | 301 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 302 | const struct sw_flow_key *key, |
f2a4d086 WT |
303 | const struct dp_upcall_info *upcall_info, |
304 | uint32_t cutlen) | |
ccb1352e JG |
305 | { |
306 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
307 | int err; |
308 | ||
15e47304 | 309 | if (upcall_info->portid == 0) { |
ccb1352e JG |
310 | err = -ENOTCONN; |
311 | goto err; | |
312 | } | |
313 | ||
ccb1352e | 314 | if (!skb_is_gso(skb)) |
f2a4d086 | 315 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e | 316 | else |
f2a4d086 | 317 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
318 | if (err) |
319 | goto err; | |
320 | ||
321 | return 0; | |
322 | ||
323 | err: | |
404f2f10 | 324 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 325 | |
df9d9fdf | 326 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 327 | stats->n_lost++; |
df9d9fdf | 328 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
329 | |
330 | return err; | |
331 | } | |
332 | ||
8055a89c | 333 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 334 | const struct sw_flow_key *key, |
f2a4d086 WT |
335 | const struct dp_upcall_info *upcall_info, |
336 | uint32_t cutlen) | |
ccb1352e | 337 | { |
a1b5d0dd | 338 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
ccb1352e JG |
339 | struct sw_flow_key later_key; |
340 | struct sk_buff *segs, *nskb; | |
341 | int err; | |
342 | ||
9207f9d4 | 343 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET); |
09c5e605 | 344 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
345 | if (IS_ERR(segs)) |
346 | return PTR_ERR(segs); | |
330966e5 FW |
347 | if (segs == NULL) |
348 | return -EINVAL; | |
ccb1352e | 349 | |
e8eedb85 PS |
350 | if (gso_type & SKB_GSO_UDP) { |
351 | /* The initial flow key extracted by ovs_flow_key_extract() | |
352 | * in this case is for a first fragment, so we need to | |
353 | * properly mark later fragments. | |
354 | */ | |
355 | later_key = *key; | |
356 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
357 | } | |
358 | ||
ccb1352e JG |
359 | /* Queue all of the segments. */ |
360 | skb = segs; | |
361 | do { | |
e8eedb85 PS |
362 | if (gso_type & SKB_GSO_UDP && skb != segs) |
363 | key = &later_key; | |
364 | ||
f2a4d086 | 365 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
366 | if (err) |
367 | break; | |
368 | ||
ccb1352e JG |
369 | } while ((skb = skb->next)); |
370 | ||
371 | /* Free all of the segments. */ | |
372 | skb = segs; | |
373 | do { | |
374 | nskb = skb->next; | |
375 | if (err) | |
376 | kfree_skb(skb); | |
377 | else | |
378 | consume_skb(skb); | |
379 | } while ((skb = nskb)); | |
380 | return err; | |
381 | } | |
382 | ||
8f0aad6f | 383 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
bda56f14 | 384 | unsigned int hdrlen) |
c3ff8cfe TG |
385 | { |
386 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 387 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
b95e5928 WT |
388 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
389 | + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */ | |
c3ff8cfe TG |
390 | |
391 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
392 | if (upcall_info->userdata) |
393 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
394 | ||
395 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
396 | if (upcall_info->egress_tun_info) | |
397 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 398 | |
ccea7445 NM |
399 | /* OVS_PACKET_ATTR_ACTIONS */ |
400 | if (upcall_info->actions_len) | |
401 | size += nla_total_size(upcall_info->actions_len); | |
402 | ||
7f8a436e JS |
403 | /* OVS_PACKET_ATTR_MRU */ |
404 | if (upcall_info->mru) | |
405 | size += nla_total_size(sizeof(upcall_info->mru)); | |
406 | ||
c3ff8cfe TG |
407 | return size; |
408 | } | |
409 | ||
7f8a436e JS |
410 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
411 | { | |
412 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
413 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
414 | ||
415 | if (plen > 0) | |
b080db58 | 416 | skb_put_zero(skb, plen); |
7f8a436e JS |
417 | } |
418 | } | |
419 | ||
8055a89c | 420 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 421 | const struct sw_flow_key *key, |
f2a4d086 WT |
422 | const struct dp_upcall_info *upcall_info, |
423 | uint32_t cutlen) | |
ccb1352e JG |
424 | { |
425 | struct ovs_header *upcall; | |
426 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 427 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 428 | struct nlattr *nla; |
795449d8 | 429 | size_t len; |
bda56f14 | 430 | unsigned int hlen; |
8055a89c TG |
431 | int err, dp_ifindex; |
432 | ||
433 | dp_ifindex = get_dpifindex(dp); | |
434 | if (!dp_ifindex) | |
435 | return -ENODEV; | |
ccb1352e | 436 | |
df8a39de | 437 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
438 | nskb = skb_clone(skb, GFP_ATOMIC); |
439 | if (!nskb) | |
440 | return -ENOMEM; | |
441 | ||
5968250c | 442 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 443 | if (!nskb) |
ccb1352e JG |
444 | return -ENOMEM; |
445 | ||
ccb1352e JG |
446 | skb = nskb; |
447 | } | |
448 | ||
449 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
450 | err = -EFBIG; | |
451 | goto out; | |
452 | } | |
453 | ||
bda56f14 TG |
454 | /* Complete checksum if needed */ |
455 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
7529390d | 456 | (err = skb_csum_hwoffload_help(skb, 0))) |
bda56f14 TG |
457 | goto out; |
458 | ||
459 | /* Older versions of OVS user space enforce alignment of the last | |
460 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
461 | * padding logic. Only perform zerocopy if padding is not required. | |
462 | */ | |
463 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
464 | hlen = skb_zerocopy_headlen(skb); | |
465 | else | |
466 | hlen = skb->len; | |
467 | ||
f2a4d086 | 468 | len = upcall_msg_size(upcall_info, hlen - cutlen); |
551ddc05 | 469 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
ccb1352e JG |
470 | if (!user_skb) { |
471 | err = -ENOMEM; | |
472 | goto out; | |
473 | } | |
474 | ||
475 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
476 | 0, upcall_info->cmd); | |
477 | upcall->dp_ifindex = dp_ifindex; | |
478 | ||
5b4237bb | 479 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
f53e3831 | 480 | BUG_ON(err); |
ccb1352e JG |
481 | |
482 | if (upcall_info->userdata) | |
4490108b BP |
483 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
484 | nla_len(upcall_info->userdata), | |
485 | nla_data(upcall_info->userdata)); | |
ccb1352e | 486 | |
8f0aad6f WZ |
487 | if (upcall_info->egress_tun_info) { |
488 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
fc4099f1 PS |
489 | err = ovs_nla_put_tunnel_info(user_skb, |
490 | upcall_info->egress_tun_info); | |
8f0aad6f WZ |
491 | BUG_ON(err); |
492 | nla_nest_end(user_skb, nla); | |
493 | } | |
494 | ||
ccea7445 NM |
495 | if (upcall_info->actions_len) { |
496 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS); | |
497 | err = ovs_nla_put_actions(upcall_info->actions, | |
498 | upcall_info->actions_len, | |
499 | user_skb); | |
500 | if (!err) | |
501 | nla_nest_end(user_skb, nla); | |
502 | else | |
503 | nla_nest_cancel(user_skb, nla); | |
504 | } | |
505 | ||
7f8a436e JS |
506 | /* Add OVS_PACKET_ATTR_MRU */ |
507 | if (upcall_info->mru) { | |
508 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
509 | upcall_info->mru)) { | |
510 | err = -ENOBUFS; | |
511 | goto out; | |
512 | } | |
513 | pad_packet(dp, user_skb); | |
514 | } | |
515 | ||
b95e5928 WT |
516 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
517 | if (cutlen > 0) { | |
518 | if (nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, | |
519 | skb->len)) { | |
520 | err = -ENOBUFS; | |
521 | goto out; | |
522 | } | |
523 | pad_packet(dp, user_skb); | |
524 | } | |
525 | ||
bda56f14 TG |
526 | /* Only reserve room for attribute header, packet data is added |
527 | * in skb_zerocopy() */ | |
528 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
529 | err = -ENOBUFS; | |
530 | goto out; | |
531 | } | |
f2a4d086 | 532 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
ccb1352e | 533 | |
f2a4d086 | 534 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
36d5fe6a ZK |
535 | if (err) |
536 | goto out; | |
ccb1352e | 537 | |
aea0bb4f | 538 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 539 | pad_packet(dp, user_skb); |
aea0bb4f | 540 | |
bda56f14 | 541 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 542 | |
bda56f14 | 543 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 544 | user_skb = NULL; |
ccb1352e | 545 | out: |
36d5fe6a ZK |
546 | if (err) |
547 | skb_tx_error(skb); | |
4ee45ea0 | 548 | kfree_skb(user_skb); |
ccb1352e JG |
549 | kfree_skb(nskb); |
550 | return err; | |
551 | } | |
552 | ||
ccb1352e JG |
553 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
554 | { | |
555 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 556 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
557 | struct nlattr **a = info->attrs; |
558 | struct sw_flow_actions *acts; | |
559 | struct sk_buff *packet; | |
560 | struct sw_flow *flow; | |
d98612b8 | 561 | struct sw_flow_actions *sf_acts; |
ccb1352e | 562 | struct datapath *dp; |
83c8df26 | 563 | struct vport *input_vport; |
7f8a436e | 564 | u16 mru = 0; |
ccb1352e JG |
565 | int len; |
566 | int err; | |
1ba39804 | 567 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
568 | |
569 | err = -EINVAL; | |
570 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 571 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
572 | goto err; |
573 | ||
574 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
575 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
576 | err = -ENOMEM; | |
577 | if (!packet) | |
578 | goto err; | |
579 | skb_reserve(packet, NET_IP_ALIGN); | |
580 | ||
32686a9d | 581 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e | 582 | |
7f8a436e JS |
583 | /* Set packet's mru */ |
584 | if (a[OVS_PACKET_ATTR_MRU]) { | |
585 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
586 | packet->ignore_df = 1; | |
587 | } | |
588 | OVS_CB(packet)->mru = mru; | |
589 | ||
ccb1352e | 590 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 591 | flow = ovs_flow_alloc(); |
ccb1352e JG |
592 | err = PTR_ERR(flow); |
593 | if (IS_ERR(flow)) | |
594 | goto err_kfree_skb; | |
595 | ||
c2ac6673 JS |
596 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
597 | packet, &flow->key, log); | |
ccb1352e JG |
598 | if (err) |
599 | goto err_flow_free; | |
600 | ||
7f8a436e | 601 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 602 | &flow->key, &acts, log); |
74f84a57 PS |
603 | if (err) |
604 | goto err_flow_free; | |
ccb1352e | 605 | |
f5796684 | 606 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 607 | packet->priority = flow->key.phy.priority; |
39c7caeb | 608 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
609 | |
610 | rcu_read_lock(); | |
7f8a436e | 611 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
612 | err = -ENODEV; |
613 | if (!dp) | |
614 | goto err_unlock; | |
615 | ||
83c8df26 PS |
616 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
617 | if (!input_vport) | |
618 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
619 | ||
620 | if (!input_vport) | |
621 | goto err_unlock; | |
622 | ||
7f8a436e | 623 | packet->dev = input_vport->dev; |
83c8df26 | 624 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 625 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 626 | |
ccb1352e | 627 | local_bh_disable(); |
d98612b8 | 628 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
629 | local_bh_enable(); |
630 | rcu_read_unlock(); | |
631 | ||
03f0d916 | 632 | ovs_flow_free(flow, false); |
ccb1352e JG |
633 | return err; |
634 | ||
635 | err_unlock: | |
636 | rcu_read_unlock(); | |
637 | err_flow_free: | |
03f0d916 | 638 | ovs_flow_free(flow, false); |
ccb1352e JG |
639 | err_kfree_skb: |
640 | kfree_skb(packet); | |
641 | err: | |
642 | return err; | |
643 | } | |
644 | ||
645 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 646 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
647 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
648 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 649 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 650 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
ccb1352e JG |
651 | }; |
652 | ||
4534de83 | 653 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e | 654 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
4a92602a | 655 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
656 | .policy = packet_policy, |
657 | .doit = ovs_packet_cmd_execute | |
658 | } | |
659 | }; | |
660 | ||
56989f6d | 661 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
0c200ef9 PS |
662 | .hdrsize = sizeof(struct ovs_header), |
663 | .name = OVS_PACKET_FAMILY, | |
664 | .version = OVS_PACKET_VERSION, | |
665 | .maxattr = OVS_PACKET_ATTR_MAX, | |
666 | .netnsok = true, | |
667 | .parallel_ops = true, | |
668 | .ops = dp_packet_genl_ops, | |
669 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
489111e5 | 670 | .module = THIS_MODULE, |
0c200ef9 PS |
671 | }; |
672 | ||
12eb18f7 | 673 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 674 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
675 | { |
676 | int i; | |
ccb1352e | 677 | |
1bd7116f AZ |
678 | memset(mega_stats, 0, sizeof(*mega_stats)); |
679 | ||
b637e498 | 680 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 681 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
682 | |
683 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 684 | |
ccb1352e JG |
685 | for_each_possible_cpu(i) { |
686 | const struct dp_stats_percpu *percpu_stats; | |
687 | struct dp_stats_percpu local_stats; | |
688 | unsigned int start; | |
689 | ||
690 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
691 | ||
692 | do { | |
57a7744e | 693 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 694 | local_stats = *percpu_stats; |
57a7744e | 695 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
696 | |
697 | stats->n_hit += local_stats.n_hit; | |
698 | stats->n_missed += local_stats.n_missed; | |
699 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 700 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
701 | } |
702 | } | |
703 | ||
74ed7ab9 JS |
704 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
705 | { | |
706 | return ovs_identifier_is_ufid(sfid) && | |
707 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
708 | } | |
709 | ||
710 | static bool should_fill_mask(uint32_t ufid_flags) | |
711 | { | |
712 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
713 | } | |
714 | ||
715 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 716 | { |
74ed7ab9 JS |
717 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
718 | } | |
719 | ||
720 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
721 | const struct sw_flow_id *sfid, | |
722 | uint32_t ufid_flags) | |
723 | { | |
724 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
725 | ||
726 | /* OVS_FLOW_ATTR_UFID */ | |
727 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
728 | len += nla_total_size(sfid->ufid_len); | |
729 | ||
730 | /* OVS_FLOW_ATTR_KEY */ | |
731 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
732 | len += nla_total_size(ovs_key_attr_size()); | |
733 | ||
734 | /* OVS_FLOW_ATTR_MASK */ | |
735 | if (should_fill_mask(ufid_flags)) | |
736 | len += nla_total_size(ovs_key_attr_size()); | |
737 | ||
738 | /* OVS_FLOW_ATTR_ACTIONS */ | |
739 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 740 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
741 | |
742 | return len | |
66c7a5ee | 743 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
c3ff8cfe | 744 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
66c7a5ee | 745 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
746 | } |
747 | ||
ca7105f2 JS |
748 | /* Called with ovs_mutex or RCU read lock. */ |
749 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
750 | struct sk_buff *skb) | |
751 | { | |
752 | struct ovs_flow_stats stats; | |
753 | __be16 tcp_flags; | |
754 | unsigned long used; | |
ccb1352e | 755 | |
e298e505 | 756 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 757 | |
028d6a67 | 758 | if (used && |
0238b720 ND |
759 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
760 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 761 | return -EMSGSIZE; |
ccb1352e | 762 | |
028d6a67 | 763 | if (stats.n_packets && |
66c7a5ee ND |
764 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
765 | sizeof(struct ovs_flow_stats), &stats, | |
766 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 767 | return -EMSGSIZE; |
ccb1352e | 768 | |
e298e505 PS |
769 | if ((u8)ntohs(tcp_flags) && |
770 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
771 | return -EMSGSIZE; |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
776 | /* Called with ovs_mutex or RCU read lock. */ | |
777 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
778 | struct sk_buff *skb, int skb_orig_len) | |
779 | { | |
780 | struct nlattr *start; | |
781 | int err; | |
ccb1352e JG |
782 | |
783 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
784 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
785 | * Netlink but individual action lists can be longer than | |
786 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
787 | * The userspace caller can always fetch the actions separately if it | |
788 | * really wants them. (Most userspace callers in fact don't care.) | |
789 | * | |
790 | * This can only fail for dump operations because the skb is always | |
791 | * properly sized for single flows. | |
792 | */ | |
74f84a57 PS |
793 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
794 | if (start) { | |
d57170b1 PS |
795 | const struct sw_flow_actions *sf_acts; |
796 | ||
663efa36 | 797 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
798 | err = ovs_nla_put_actions(sf_acts->actions, |
799 | sf_acts->actions_len, skb); | |
0e9796b4 | 800 | |
74f84a57 PS |
801 | if (!err) |
802 | nla_nest_end(skb, start); | |
803 | else { | |
804 | if (skb_orig_len) | |
ca7105f2 | 805 | return err; |
74f84a57 PS |
806 | |
807 | nla_nest_cancel(skb, start); | |
808 | } | |
ca7105f2 JS |
809 | } else if (skb_orig_len) { |
810 | return -EMSGSIZE; | |
811 | } | |
812 | ||
813 | return 0; | |
814 | } | |
815 | ||
816 | /* Called with ovs_mutex or RCU read lock. */ | |
817 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
818 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 819 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
820 | { |
821 | const int skb_orig_len = skb->len; | |
822 | struct ovs_header *ovs_header; | |
823 | int err; | |
824 | ||
825 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
826 | flags, cmd); | |
827 | if (!ovs_header) | |
828 | return -EMSGSIZE; | |
829 | ||
830 | ovs_header->dp_ifindex = dp_ifindex; | |
831 | ||
74ed7ab9 | 832 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
833 | if (err) |
834 | goto error; | |
835 | ||
74ed7ab9 JS |
836 | if (should_fill_key(&flow->id, ufid_flags)) { |
837 | err = ovs_nla_put_masked_key(flow, skb); | |
838 | if (err) | |
839 | goto error; | |
840 | } | |
841 | ||
842 | if (should_fill_mask(ufid_flags)) { | |
843 | err = ovs_nla_put_mask(flow, skb); | |
844 | if (err) | |
845 | goto error; | |
846 | } | |
ca7105f2 JS |
847 | |
848 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
849 | if (err) | |
850 | goto error; | |
851 | ||
74ed7ab9 JS |
852 | if (should_fill_actions(ufid_flags)) { |
853 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
854 | if (err) | |
855 | goto error; | |
856 | } | |
ccb1352e | 857 | |
053c095a JB |
858 | genlmsg_end(skb, ovs_header); |
859 | return 0; | |
ccb1352e | 860 | |
ccb1352e JG |
861 | error: |
862 | genlmsg_cancel(skb, ovs_header); | |
863 | return err; | |
864 | } | |
865 | ||
0e9796b4 JR |
866 | /* May not be called with RCU read lock. */ |
867 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 868 | const struct sw_flow_id *sfid, |
fb5d1e9e | 869 | struct genl_info *info, |
74ed7ab9 JS |
870 | bool always, |
871 | uint32_t ufid_flags) | |
ccb1352e | 872 | { |
fb5d1e9e | 873 | struct sk_buff *skb; |
74ed7ab9 | 874 | size_t len; |
ccb1352e | 875 | |
9b67aa4a | 876 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
877 | return NULL; |
878 | ||
74ed7ab9 | 879 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
551ddc05 | 880 | skb = genlmsg_new(len, GFP_KERNEL); |
fb5d1e9e JR |
881 | if (!skb) |
882 | return ERR_PTR(-ENOMEM); | |
883 | ||
884 | return skb; | |
ccb1352e JG |
885 | } |
886 | ||
0e9796b4 JR |
887 | /* Called with ovs_mutex. */ |
888 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
889 | int dp_ifindex, | |
890 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 891 | bool always, u32 ufid_flags) |
ccb1352e JG |
892 | { |
893 | struct sk_buff *skb; | |
894 | int retval; | |
895 | ||
74ed7ab9 JS |
896 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
897 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 898 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 899 | return skb; |
ccb1352e | 900 | |
0e9796b4 JR |
901 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
902 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 903 | cmd, ufid_flags); |
ccb1352e JG |
904 | BUG_ON(retval < 0); |
905 | return skb; | |
906 | } | |
907 | ||
37bdc87b | 908 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 909 | { |
7f8a436e | 910 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
911 | struct nlattr **a = info->attrs; |
912 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 913 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 914 | struct sw_flow_mask mask; |
ccb1352e JG |
915 | struct sk_buff *reply; |
916 | struct datapath *dp; | |
37bdc87b | 917 | struct sw_flow_actions *acts; |
03f0d916 | 918 | struct sw_flow_match match; |
74ed7ab9 | 919 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 920 | int error; |
05da5898 | 921 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 922 | |
893f139b | 923 | /* Must have key and actions. */ |
ccb1352e | 924 | error = -EINVAL; |
426cda5c | 925 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 926 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 927 | goto error; |
426cda5c JG |
928 | } |
929 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 930 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 931 | goto error; |
426cda5c | 932 | } |
03f0d916 | 933 | |
893f139b JR |
934 | /* Most of the time we need to allocate a new flow, do it before |
935 | * locking. | |
936 | */ | |
937 | new_flow = ovs_flow_alloc(); | |
938 | if (IS_ERR(new_flow)) { | |
939 | error = PTR_ERR(new_flow); | |
940 | goto error; | |
941 | } | |
942 | ||
943 | /* Extract key. */ | |
2279994d | 944 | ovs_match_init(&match, &new_flow->key, false, &mask); |
c2ac6673 | 945 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 946 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 947 | if (error) |
893f139b | 948 | goto err_kfree_flow; |
ccb1352e | 949 | |
74ed7ab9 JS |
950 | /* Extract flow identifier. */ |
951 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
190aa3e7 | 952 | &new_flow->key, log); |
74ed7ab9 JS |
953 | if (error) |
954 | goto err_kfree_flow; | |
74f84a57 | 955 | |
190aa3e7 | 956 | /* unmasked key is needed to match when ufid is not used. */ |
957 | if (ovs_identifier_is_key(&new_flow->id)) | |
958 | match.key = new_flow->id.unmasked_key; | |
959 | ||
960 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
961 | ||
893f139b | 962 | /* Validate actions. */ |
7f8a436e JS |
963 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
964 | &new_flow->key, &acts, log); | |
37bdc87b | 965 | if (error) { |
05da5898 | 966 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 967 | goto err_kfree_flow; |
893f139b JR |
968 | } |
969 | ||
74ed7ab9 JS |
970 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
971 | ufid_flags); | |
893f139b JR |
972 | if (IS_ERR(reply)) { |
973 | error = PTR_ERR(reply); | |
974 | goto err_kfree_acts; | |
ccb1352e JG |
975 | } |
976 | ||
8e4e1713 | 977 | ovs_lock(); |
7f8a436e | 978 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
979 | if (unlikely(!dp)) { |
980 | error = -ENODEV; | |
8e4e1713 | 981 | goto err_unlock_ovs; |
893f139b | 982 | } |
74ed7ab9 | 983 | |
03f0d916 | 984 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
985 | if (ovs_identifier_is_ufid(&new_flow->id)) |
986 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
987 | if (!flow) | |
190aa3e7 | 988 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
893f139b JR |
989 | if (likely(!flow)) { |
990 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
991 | |
992 | /* Put flow in bucket. */ | |
893f139b JR |
993 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
994 | if (unlikely(error)) { | |
618ed0c8 | 995 | acts = NULL; |
893f139b JR |
996 | goto err_unlock_ovs; |
997 | } | |
998 | ||
999 | if (unlikely(reply)) { | |
1000 | error = ovs_flow_cmd_fill_info(new_flow, | |
1001 | ovs_header->dp_ifindex, | |
1002 | reply, info->snd_portid, | |
1003 | info->snd_seq, 0, | |
74ed7ab9 JS |
1004 | OVS_FLOW_CMD_NEW, |
1005 | ufid_flags); | |
893f139b | 1006 | BUG_ON(error < 0); |
618ed0c8 | 1007 | } |
893f139b | 1008 | ovs_unlock(); |
ccb1352e | 1009 | } else { |
37bdc87b JR |
1010 | struct sw_flow_actions *old_acts; |
1011 | ||
ccb1352e JG |
1012 | /* Bail out if we're not allowed to modify an existing flow. |
1013 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1014 | * because Generic Netlink treats the latter as a dump | |
1015 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1016 | * gets fixed. | |
1017 | */ | |
893f139b JR |
1018 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1019 | | NLM_F_EXCL))) { | |
1020 | error = -EEXIST; | |
8e4e1713 | 1021 | goto err_unlock_ovs; |
893f139b | 1022 | } |
74ed7ab9 JS |
1023 | /* The flow identifier has to be the same for flow updates. |
1024 | * Look for any overlapping flow. | |
1025 | */ | |
1026 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1027 | if (ovs_identifier_is_key(&flow->id)) | |
1028 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1029 | &match); | |
1030 | else /* UFID matches but key is different */ | |
1031 | flow = NULL; | |
4a46b24e AW |
1032 | if (!flow) { |
1033 | error = -ENOENT; | |
1034 | goto err_unlock_ovs; | |
1035 | } | |
893f139b | 1036 | } |
37bdc87b JR |
1037 | /* Update actions. */ |
1038 | old_acts = ovsl_dereference(flow->sf_acts); | |
1039 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1040 | |
893f139b JR |
1041 | if (unlikely(reply)) { |
1042 | error = ovs_flow_cmd_fill_info(flow, | |
1043 | ovs_header->dp_ifindex, | |
1044 | reply, info->snd_portid, | |
1045 | info->snd_seq, 0, | |
74ed7ab9 JS |
1046 | OVS_FLOW_CMD_NEW, |
1047 | ufid_flags); | |
893f139b JR |
1048 | BUG_ON(error < 0); |
1049 | } | |
1050 | ovs_unlock(); | |
37bdc87b | 1051 | |
34ae932a | 1052 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1053 | ovs_flow_free(new_flow, false); |
37bdc87b | 1054 | } |
893f139b JR |
1055 | |
1056 | if (reply) | |
1057 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1058 | return 0; |
1059 | ||
37bdc87b JR |
1060 | err_unlock_ovs: |
1061 | ovs_unlock(); | |
893f139b JR |
1062 | kfree_skb(reply); |
1063 | err_kfree_acts: | |
34ae932a | 1064 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1065 | err_kfree_flow: |
1066 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1067 | error: |
1068 | return error; | |
1069 | } | |
ccb1352e | 1070 | |
2fdb957d | 1071 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
7f8a436e JS |
1072 | static struct sw_flow_actions *get_flow_actions(struct net *net, |
1073 | const struct nlattr *a, | |
6b205b2c | 1074 | const struct sw_flow_key *key, |
05da5898 JR |
1075 | const struct sw_flow_mask *mask, |
1076 | bool log) | |
6b205b2c JG |
1077 | { |
1078 | struct sw_flow_actions *acts; | |
1079 | struct sw_flow_key masked_key; | |
1080 | int error; | |
1081 | ||
ae5f2fb1 | 1082 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1083 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1084 | if (error) { |
05da5898 JR |
1085 | OVS_NLERR(log, |
1086 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1087 | return ERR_PTR(error); |
1088 | } | |
1089 | ||
1090 | return acts; | |
1091 | } | |
1092 | ||
9cc9a5cb TZ |
1093 | /* Factor out match-init and action-copy to avoid |
1094 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1095 | * used to get actions, we new a function to save some | |
1096 | * stack space. | |
1097 | * | |
1098 | * If there are not key and action attrs, we return 0 | |
1099 | * directly. In the case, the caller will also not use the | |
1100 | * match as before. If there is action attr, we try to get | |
1101 | * actions and save them to *acts. Before returning from | |
1102 | * the function, we reset the match->mask pointer. Because | |
1103 | * we should not to return match object with dangling reference | |
1104 | * to mask. | |
1105 | * */ | |
1106 | static int ovs_nla_init_match_and_action(struct net *net, | |
1107 | struct sw_flow_match *match, | |
1108 | struct sw_flow_key *key, | |
1109 | struct nlattr **a, | |
1110 | struct sw_flow_actions **acts, | |
1111 | bool log) | |
1112 | { | |
1113 | struct sw_flow_mask mask; | |
1114 | int error = 0; | |
1115 | ||
1116 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1117 | ovs_match_init(match, key, true, &mask); | |
1118 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1119 | a[OVS_FLOW_ATTR_MASK], log); | |
1120 | if (error) | |
1121 | goto error; | |
1122 | } | |
1123 | ||
1124 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1125 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1126 | OVS_NLERR(log, | |
1127 | "Flow key attribute not present in set flow."); | |
1128 | return -EINVAL; | |
1129 | } | |
1130 | ||
1131 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1132 | &mask, log); | |
1133 | if (IS_ERR(*acts)) { | |
1134 | error = PTR_ERR(*acts); | |
1135 | goto error; | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | /* On success, error is 0. */ | |
1140 | error: | |
1141 | match->mask = NULL; | |
1142 | return error; | |
1143 | } | |
1144 | ||
37bdc87b JR |
1145 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1146 | { | |
7f8a436e | 1147 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1148 | struct nlattr **a = info->attrs; |
1149 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1150 | struct sw_flow_key key; |
37bdc87b | 1151 | struct sw_flow *flow; |
37bdc87b JR |
1152 | struct sk_buff *reply = NULL; |
1153 | struct datapath *dp; | |
893f139b | 1154 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1155 | struct sw_flow_match match; |
74ed7ab9 JS |
1156 | struct sw_flow_id sfid; |
1157 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
6f15cdbf | 1158 | int error = 0; |
05da5898 | 1159 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1160 | bool ufid_present; |
37bdc87b | 1161 | |
74ed7ab9 | 1162 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
9cc9a5cb | 1163 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
6f15cdbf SG |
1164 | OVS_NLERR(log, |
1165 | "Flow set message rejected, Key attribute missing."); | |
9cc9a5cb | 1166 | return -EINVAL; |
6f15cdbf | 1167 | } |
9cc9a5cb TZ |
1168 | |
1169 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1170 | &acts, log); | |
37bdc87b JR |
1171 | if (error) |
1172 | goto error; | |
1173 | ||
9cc9a5cb | 1174 | if (acts) { |
2fdb957d | 1175 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1176 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1177 | ufid_flags); | |
893f139b JR |
1178 | if (IS_ERR(reply)) { |
1179 | error = PTR_ERR(reply); | |
1180 | goto err_kfree_acts; | |
be52c9e9 | 1181 | } |
37bdc87b | 1182 | } |
0e9796b4 | 1183 | |
37bdc87b | 1184 | ovs_lock(); |
7f8a436e | 1185 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1186 | if (unlikely(!dp)) { |
1187 | error = -ENODEV; | |
37bdc87b | 1188 | goto err_unlock_ovs; |
893f139b | 1189 | } |
37bdc87b | 1190 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1191 | if (ufid_present) |
1192 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1193 | else | |
1194 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1195 | if (unlikely(!flow)) { |
1196 | error = -ENOENT; | |
37bdc87b | 1197 | goto err_unlock_ovs; |
893f139b | 1198 | } |
4a46b24e | 1199 | |
37bdc87b | 1200 | /* Update actions, if present. */ |
893f139b | 1201 | if (likely(acts)) { |
37bdc87b JR |
1202 | old_acts = ovsl_dereference(flow->sf_acts); |
1203 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1204 | |
1205 | if (unlikely(reply)) { | |
1206 | error = ovs_flow_cmd_fill_info(flow, | |
1207 | ovs_header->dp_ifindex, | |
1208 | reply, info->snd_portid, | |
1209 | info->snd_seq, 0, | |
74ed7ab9 JS |
1210 | OVS_FLOW_CMD_NEW, |
1211 | ufid_flags); | |
893f139b JR |
1212 | BUG_ON(error < 0); |
1213 | } | |
1214 | } else { | |
1215 | /* Could not alloc without acts before locking. */ | |
1216 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
74ed7ab9 JS |
1217 | info, OVS_FLOW_CMD_NEW, false, |
1218 | ufid_flags); | |
1219 | ||
b5ffe634 | 1220 | if (IS_ERR(reply)) { |
893f139b JR |
1221 | error = PTR_ERR(reply); |
1222 | goto err_unlock_ovs; | |
1223 | } | |
ccb1352e | 1224 | } |
37bdc87b | 1225 | |
37bdc87b JR |
1226 | /* Clear stats. */ |
1227 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1228 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1229 | ovs_unlock(); |
ccb1352e | 1230 | |
893f139b JR |
1231 | if (reply) |
1232 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1233 | if (old_acts) | |
34ae932a | 1234 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1235 | |
ccb1352e JG |
1236 | return 0; |
1237 | ||
8e4e1713 PS |
1238 | err_unlock_ovs: |
1239 | ovs_unlock(); | |
893f139b JR |
1240 | kfree_skb(reply); |
1241 | err_kfree_acts: | |
34ae932a | 1242 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1243 | error: |
1244 | return error; | |
1245 | } | |
1246 | ||
1247 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1248 | { | |
1249 | struct nlattr **a = info->attrs; | |
1250 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1251 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1252 | struct sw_flow_key key; |
1253 | struct sk_buff *reply; | |
1254 | struct sw_flow *flow; | |
1255 | struct datapath *dp; | |
03f0d916 | 1256 | struct sw_flow_match match; |
74ed7ab9 JS |
1257 | struct sw_flow_id ufid; |
1258 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1259 | int err = 0; | |
05da5898 | 1260 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1261 | bool ufid_present; |
ccb1352e | 1262 | |
74ed7ab9 JS |
1263 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1264 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1265 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 | 1266 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1267 | log); |
1268 | } else if (!ufid_present) { | |
05da5898 JR |
1269 | OVS_NLERR(log, |
1270 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1271 | err = -EINVAL; |
03f0d916 | 1272 | } |
ccb1352e JG |
1273 | if (err) |
1274 | return err; | |
1275 | ||
8e4e1713 | 1276 | ovs_lock(); |
46df7b81 | 1277 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1278 | if (!dp) { |
1279 | err = -ENODEV; | |
1280 | goto unlock; | |
1281 | } | |
ccb1352e | 1282 | |
74ed7ab9 JS |
1283 | if (ufid_present) |
1284 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1285 | else | |
1286 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1287 | if (!flow) { |
8e4e1713 PS |
1288 | err = -ENOENT; |
1289 | goto unlock; | |
1290 | } | |
ccb1352e | 1291 | |
0e9796b4 | 1292 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
74ed7ab9 | 1293 | OVS_FLOW_CMD_NEW, true, ufid_flags); |
8e4e1713 PS |
1294 | if (IS_ERR(reply)) { |
1295 | err = PTR_ERR(reply); | |
1296 | goto unlock; | |
1297 | } | |
ccb1352e | 1298 | |
8e4e1713 | 1299 | ovs_unlock(); |
ccb1352e | 1300 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1301 | unlock: |
1302 | ovs_unlock(); | |
1303 | return err; | |
ccb1352e JG |
1304 | } |
1305 | ||
1306 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1307 | { | |
1308 | struct nlattr **a = info->attrs; | |
1309 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1310 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1311 | struct sw_flow_key key; |
1312 | struct sk_buff *reply; | |
74ed7ab9 | 1313 | struct sw_flow *flow = NULL; |
ccb1352e | 1314 | struct datapath *dp; |
03f0d916 | 1315 | struct sw_flow_match match; |
74ed7ab9 JS |
1316 | struct sw_flow_id ufid; |
1317 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1318 | int err; |
05da5898 | 1319 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1320 | bool ufid_present; |
ccb1352e | 1321 | |
74ed7ab9 JS |
1322 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1323 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1324 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 JS |
1325 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1326 | NULL, log); | |
aed06778 JR |
1327 | if (unlikely(err)) |
1328 | return err; | |
1329 | } | |
1330 | ||
8e4e1713 | 1331 | ovs_lock(); |
46df7b81 | 1332 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1333 | if (unlikely(!dp)) { |
8e4e1713 PS |
1334 | err = -ENODEV; |
1335 | goto unlock; | |
1336 | } | |
46df7b81 | 1337 | |
74ed7ab9 | 1338 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1339 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1340 | goto unlock; |
1341 | } | |
03f0d916 | 1342 | |
74ed7ab9 JS |
1343 | if (ufid_present) |
1344 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1345 | else | |
1346 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1347 | if (unlikely(!flow)) { |
8e4e1713 PS |
1348 | err = -ENOENT; |
1349 | goto unlock; | |
1350 | } | |
ccb1352e | 1351 | |
b637e498 | 1352 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1353 | ovs_unlock(); |
ccb1352e | 1354 | |
aed06778 | 1355 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1356 | &flow->id, info, false, ufid_flags); |
aed06778 JR |
1357 | if (likely(reply)) { |
1358 | if (likely(!IS_ERR(reply))) { | |
1359 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1360 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1361 | reply, info->snd_portid, | |
1362 | info->snd_seq, 0, | |
74ed7ab9 JS |
1363 | OVS_FLOW_CMD_DEL, |
1364 | ufid_flags); | |
aed06778 JR |
1365 | rcu_read_unlock(); |
1366 | BUG_ON(err < 0); | |
1367 | ||
1368 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1369 | } else { | |
1370 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1371 | } | |
fb5d1e9e | 1372 | } |
ccb1352e | 1373 | |
aed06778 | 1374 | ovs_flow_free(flow, true); |
ccb1352e | 1375 | return 0; |
8e4e1713 PS |
1376 | unlock: |
1377 | ovs_unlock(); | |
1378 | return err; | |
ccb1352e JG |
1379 | } |
1380 | ||
1381 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1382 | { | |
74ed7ab9 | 1383 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1384 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1385 | struct table_instance *ti; |
ccb1352e | 1386 | struct datapath *dp; |
74ed7ab9 JS |
1387 | u32 ufid_flags; |
1388 | int err; | |
1389 | ||
1390 | err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a, | |
fceb6435 | 1391 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); |
74ed7ab9 JS |
1392 | if (err) |
1393 | return err; | |
1394 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1395 | |
d57170b1 | 1396 | rcu_read_lock(); |
cc3a5ae6 | 1397 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1398 | if (!dp) { |
d57170b1 | 1399 | rcu_read_unlock(); |
ccb1352e | 1400 | return -ENODEV; |
8e4e1713 | 1401 | } |
ccb1352e | 1402 | |
b637e498 | 1403 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1404 | for (;;) { |
1405 | struct sw_flow *flow; | |
1406 | u32 bucket, obj; | |
1407 | ||
1408 | bucket = cb->args[0]; | |
1409 | obj = cb->args[1]; | |
b637e498 | 1410 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1411 | if (!flow) |
1412 | break; | |
1413 | ||
0e9796b4 | 1414 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1415 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1416 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
74ed7ab9 | 1417 | OVS_FLOW_CMD_NEW, ufid_flags) < 0) |
ccb1352e JG |
1418 | break; |
1419 | ||
1420 | cb->args[0] = bucket; | |
1421 | cb->args[1] = obj; | |
1422 | } | |
d57170b1 | 1423 | rcu_read_unlock(); |
ccb1352e JG |
1424 | return skb->len; |
1425 | } | |
1426 | ||
0c200ef9 PS |
1427 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1428 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1429 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1430 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1431 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1432 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1433 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1434 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1435 | }; |
1436 | ||
48e48a70 | 1437 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e | 1438 | { .cmd = OVS_FLOW_CMD_NEW, |
4a92602a | 1439 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e | 1440 | .policy = flow_policy, |
37bdc87b | 1441 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1442 | }, |
1443 | { .cmd = OVS_FLOW_CMD_DEL, | |
4a92602a | 1444 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1445 | .policy = flow_policy, |
1446 | .doit = ovs_flow_cmd_del | |
1447 | }, | |
1448 | { .cmd = OVS_FLOW_CMD_GET, | |
1449 | .flags = 0, /* OK for unprivileged users. */ | |
1450 | .policy = flow_policy, | |
1451 | .doit = ovs_flow_cmd_get, | |
1452 | .dumpit = ovs_flow_cmd_dump | |
1453 | }, | |
1454 | { .cmd = OVS_FLOW_CMD_SET, | |
4a92602a | 1455 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e | 1456 | .policy = flow_policy, |
37bdc87b | 1457 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1458 | }, |
1459 | }; | |
1460 | ||
56989f6d | 1461 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
ccb1352e | 1462 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1463 | .name = OVS_FLOW_FAMILY, |
1464 | .version = OVS_FLOW_VERSION, | |
1465 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3a4e0d6a PS |
1466 | .netnsok = true, |
1467 | .parallel_ops = true, | |
0c200ef9 PS |
1468 | .ops = dp_flow_genl_ops, |
1469 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1470 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1471 | .n_mcgrps = 1, | |
489111e5 | 1472 | .module = THIS_MODULE, |
ccb1352e JG |
1473 | }; |
1474 | ||
c3ff8cfe TG |
1475 | static size_t ovs_dp_cmd_msg_size(void) |
1476 | { | |
1477 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1478 | ||
1479 | msgsize += nla_total_size(IFNAMSIZ); | |
66c7a5ee ND |
1480 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1481 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
45fb9c35 | 1482 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1483 | |
1484 | return msgsize; | |
1485 | } | |
1486 | ||
8ec609d8 | 1487 | /* Called with ovs_mutex. */ |
ccb1352e | 1488 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1489 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1490 | { |
1491 | struct ovs_header *ovs_header; | |
1492 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1493 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1494 | int err; |
1495 | ||
15e47304 | 1496 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1497 | flags, cmd); |
1498 | if (!ovs_header) | |
1499 | goto error; | |
1500 | ||
1501 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1502 | ||
ccb1352e | 1503 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1504 | if (err) |
1505 | goto nla_put_failure; | |
1506 | ||
1bd7116f | 1507 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
66c7a5ee ND |
1508 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1509 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1bd7116f AZ |
1510 | goto nla_put_failure; |
1511 | ||
66c7a5ee ND |
1512 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1513 | sizeof(struct ovs_dp_megaflow_stats), | |
1514 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
028d6a67 | 1515 | goto nla_put_failure; |
ccb1352e | 1516 | |
43d4be9c TG |
1517 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1518 | goto nla_put_failure; | |
1519 | ||
053c095a JB |
1520 | genlmsg_end(skb, ovs_header); |
1521 | return 0; | |
ccb1352e JG |
1522 | |
1523 | nla_put_failure: | |
1524 | genlmsg_cancel(skb, ovs_header); | |
1525 | error: | |
1526 | return -EMSGSIZE; | |
1527 | } | |
1528 | ||
263ea090 | 1529 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
ccb1352e | 1530 | { |
551ddc05 | 1531 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1532 | } |
1533 | ||
bb6f9a70 | 1534 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1535 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1536 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1537 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1538 | { | |
1539 | struct datapath *dp; | |
1540 | ||
1541 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1542 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1543 | else { |
1544 | struct vport *vport; | |
1545 | ||
46df7b81 | 1546 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1547 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1548 | } |
1549 | return dp ? dp : ERR_PTR(-ENODEV); | |
1550 | } | |
1551 | ||
44da5ae5 TG |
1552 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1553 | { | |
1554 | struct datapath *dp; | |
1555 | ||
1556 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1557 | if (IS_ERR(dp)) |
44da5ae5 TG |
1558 | return; |
1559 | ||
1560 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1561 | dp->user_features = 0; | |
1562 | } | |
1563 | ||
12eb18f7 | 1564 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
43d4be9c TG |
1565 | { |
1566 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1567 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1568 | } | |
1569 | ||
ccb1352e JG |
1570 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1571 | { | |
1572 | struct nlattr **a = info->attrs; | |
1573 | struct vport_parms parms; | |
1574 | struct sk_buff *reply; | |
1575 | struct datapath *dp; | |
1576 | struct vport *vport; | |
46df7b81 | 1577 | struct ovs_net *ovs_net; |
15eac2a7 | 1578 | int err, i; |
ccb1352e JG |
1579 | |
1580 | err = -EINVAL; | |
1581 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1582 | goto err; | |
1583 | ||
263ea090 | 1584 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1585 | if (!reply) |
1586 | return -ENOMEM; | |
ccb1352e JG |
1587 | |
1588 | err = -ENOMEM; | |
1589 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1590 | if (dp == NULL) | |
6093ae9a | 1591 | goto err_free_reply; |
46df7b81 | 1592 | |
efd7ef1c | 1593 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1594 | |
1595 | /* Allocate table. */ | |
b637e498 PS |
1596 | err = ovs_flow_tbl_init(&dp->table); |
1597 | if (err) | |
ccb1352e JG |
1598 | goto err_free_dp; |
1599 | ||
1c213bd2 | 1600 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1601 | if (!dp->stats_percpu) { |
1602 | err = -ENOMEM; | |
1603 | goto err_destroy_table; | |
1604 | } | |
1605 | ||
15eac2a7 | 1606 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
e6445719 | 1607 | GFP_KERNEL); |
15eac2a7 PS |
1608 | if (!dp->ports) { |
1609 | err = -ENOMEM; | |
1610 | goto err_destroy_percpu; | |
1611 | } | |
1612 | ||
1613 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1614 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1615 | ||
ccb1352e JG |
1616 | /* Set up our datapath device. */ |
1617 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1618 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1619 | parms.options = NULL; | |
1620 | parms.dp = dp; | |
1621 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1622 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1623 | |
43d4be9c TG |
1624 | ovs_dp_change(dp, a); |
1625 | ||
6093ae9a JR |
1626 | /* So far only local changes have been made, now need the lock. */ |
1627 | ovs_lock(); | |
1628 | ||
ccb1352e JG |
1629 | vport = new_vport(&parms); |
1630 | if (IS_ERR(vport)) { | |
1631 | err = PTR_ERR(vport); | |
1632 | if (err == -EBUSY) | |
1633 | err = -EEXIST; | |
1634 | ||
44da5ae5 TG |
1635 | if (err == -EEXIST) { |
1636 | /* An outdated user space instance that does not understand | |
1637 | * the concept of user_features has attempted to create a new | |
1638 | * datapath and is likely to reuse it. Drop all user features. | |
1639 | */ | |
1640 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1641 | ovs_dp_reset_user_features(skb, info); | |
1642 | } | |
1643 | ||
15eac2a7 | 1644 | goto err_destroy_ports_array; |
ccb1352e JG |
1645 | } |
1646 | ||
6093ae9a JR |
1647 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1648 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1649 | BUG_ON(err < 0); | |
ccb1352e | 1650 | |
46df7b81 | 1651 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1652 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1653 | |
1654 | ovs_unlock(); | |
ccb1352e | 1655 | |
2a94fe48 | 1656 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1657 | return 0; |
1658 | ||
15eac2a7 | 1659 | err_destroy_ports_array: |
6093ae9a | 1660 | ovs_unlock(); |
15eac2a7 | 1661 | kfree(dp->ports); |
ccb1352e JG |
1662 | err_destroy_percpu: |
1663 | free_percpu(dp->stats_percpu); | |
1664 | err_destroy_table: | |
9b996e54 | 1665 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e JG |
1666 | err_free_dp: |
1667 | kfree(dp); | |
6093ae9a JR |
1668 | err_free_reply: |
1669 | kfree_skb(reply); | |
ccb1352e JG |
1670 | err: |
1671 | return err; | |
1672 | } | |
1673 | ||
8e4e1713 | 1674 | /* Called with ovs_mutex. */ |
46df7b81 | 1675 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1676 | { |
15eac2a7 | 1677 | int i; |
ccb1352e | 1678 | |
15eac2a7 PS |
1679 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1680 | struct vport *vport; | |
b67bfe0d | 1681 | struct hlist_node *n; |
15eac2a7 | 1682 | |
b67bfe0d | 1683 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1684 | if (vport->port_no != OVSP_LOCAL) |
1685 | ovs_dp_detach_port(vport); | |
1686 | } | |
ccb1352e | 1687 | |
59a35d60 | 1688 | list_del_rcu(&dp->list_node); |
ccb1352e | 1689 | |
8e4e1713 | 1690 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1691 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1692 | */ |
8e4e1713 | 1693 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1694 | |
e80857cc | 1695 | /* RCU destroy the flow table */ |
ccb1352e | 1696 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1697 | } |
1698 | ||
1699 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1700 | { | |
1701 | struct sk_buff *reply; | |
1702 | struct datapath *dp; | |
1703 | int err; | |
1704 | ||
263ea090 | 1705 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1706 | if (!reply) |
1707 | return -ENOMEM; | |
1708 | ||
8e4e1713 | 1709 | ovs_lock(); |
46df7b81 PS |
1710 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1711 | err = PTR_ERR(dp); | |
1712 | if (IS_ERR(dp)) | |
6093ae9a | 1713 | goto err_unlock_free; |
46df7b81 | 1714 | |
6093ae9a JR |
1715 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1716 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1717 | BUG_ON(err < 0); | |
46df7b81 PS |
1718 | |
1719 | __dp_destroy(dp); | |
8e4e1713 | 1720 | ovs_unlock(); |
ccb1352e | 1721 | |
2a94fe48 | 1722 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1723 | |
1724 | return 0; | |
6093ae9a JR |
1725 | |
1726 | err_unlock_free: | |
8e4e1713 | 1727 | ovs_unlock(); |
6093ae9a | 1728 | kfree_skb(reply); |
8e4e1713 | 1729 | return err; |
ccb1352e JG |
1730 | } |
1731 | ||
1732 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1733 | { | |
1734 | struct sk_buff *reply; | |
1735 | struct datapath *dp; | |
1736 | int err; | |
1737 | ||
263ea090 | 1738 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1739 | if (!reply) |
1740 | return -ENOMEM; | |
1741 | ||
8e4e1713 | 1742 | ovs_lock(); |
46df7b81 | 1743 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1744 | err = PTR_ERR(dp); |
ccb1352e | 1745 | if (IS_ERR(dp)) |
6093ae9a | 1746 | goto err_unlock_free; |
ccb1352e | 1747 | |
43d4be9c TG |
1748 | ovs_dp_change(dp, info->attrs); |
1749 | ||
6093ae9a JR |
1750 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1751 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1752 | BUG_ON(err < 0); | |
ccb1352e | 1753 | |
8e4e1713 | 1754 | ovs_unlock(); |
2a94fe48 | 1755 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1756 | |
1757 | return 0; | |
6093ae9a JR |
1758 | |
1759 | err_unlock_free: | |
8e4e1713 | 1760 | ovs_unlock(); |
6093ae9a | 1761 | kfree_skb(reply); |
8e4e1713 | 1762 | return err; |
ccb1352e JG |
1763 | } |
1764 | ||
1765 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1766 | { | |
1767 | struct sk_buff *reply; | |
1768 | struct datapath *dp; | |
8e4e1713 | 1769 | int err; |
ccb1352e | 1770 | |
263ea090 | 1771 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1772 | if (!reply) |
1773 | return -ENOMEM; | |
1774 | ||
8ec609d8 | 1775 | ovs_lock(); |
46df7b81 | 1776 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1777 | if (IS_ERR(dp)) { |
1778 | err = PTR_ERR(dp); | |
6093ae9a | 1779 | goto err_unlock_free; |
8e4e1713 | 1780 | } |
6093ae9a JR |
1781 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1782 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1783 | BUG_ON(err < 0); | |
8ec609d8 | 1784 | ovs_unlock(); |
ccb1352e JG |
1785 | |
1786 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1787 | |
6093ae9a | 1788 | err_unlock_free: |
8ec609d8 | 1789 | ovs_unlock(); |
6093ae9a | 1790 | kfree_skb(reply); |
8e4e1713 | 1791 | return err; |
ccb1352e JG |
1792 | } |
1793 | ||
1794 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1795 | { | |
46df7b81 | 1796 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1797 | struct datapath *dp; |
1798 | int skip = cb->args[0]; | |
1799 | int i = 0; | |
1800 | ||
8ec609d8 PS |
1801 | ovs_lock(); |
1802 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1803 | if (i >= skip && |
15e47304 | 1804 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1805 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1806 | OVS_DP_CMD_NEW) < 0) | |
1807 | break; | |
1808 | i++; | |
1809 | } | |
8ec609d8 | 1810 | ovs_unlock(); |
ccb1352e JG |
1811 | |
1812 | cb->args[0] = i; | |
1813 | ||
1814 | return skb->len; | |
1815 | } | |
1816 | ||
0c200ef9 PS |
1817 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1818 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1819 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1820 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1821 | }; | |
1822 | ||
48e48a70 | 1823 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e | 1824 | { .cmd = OVS_DP_CMD_NEW, |
4a92602a | 1825 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1826 | .policy = datapath_policy, |
1827 | .doit = ovs_dp_cmd_new | |
1828 | }, | |
1829 | { .cmd = OVS_DP_CMD_DEL, | |
4a92602a | 1830 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1831 | .policy = datapath_policy, |
1832 | .doit = ovs_dp_cmd_del | |
1833 | }, | |
1834 | { .cmd = OVS_DP_CMD_GET, | |
1835 | .flags = 0, /* OK for unprivileged users. */ | |
1836 | .policy = datapath_policy, | |
1837 | .doit = ovs_dp_cmd_get, | |
1838 | .dumpit = ovs_dp_cmd_dump | |
1839 | }, | |
1840 | { .cmd = OVS_DP_CMD_SET, | |
4a92602a | 1841 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1842 | .policy = datapath_policy, |
1843 | .doit = ovs_dp_cmd_set, | |
1844 | }, | |
1845 | }; | |
1846 | ||
56989f6d | 1847 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
ccb1352e | 1848 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1849 | .name = OVS_DATAPATH_FAMILY, |
1850 | .version = OVS_DATAPATH_VERSION, | |
1851 | .maxattr = OVS_DP_ATTR_MAX, | |
3a4e0d6a PS |
1852 | .netnsok = true, |
1853 | .parallel_ops = true, | |
0c200ef9 PS |
1854 | .ops = dp_datapath_genl_ops, |
1855 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1856 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1857 | .n_mcgrps = 1, | |
489111e5 | 1858 | .module = THIS_MODULE, |
ccb1352e JG |
1859 | }; |
1860 | ||
8e4e1713 | 1861 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1862 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1863 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1864 | { |
1865 | struct ovs_header *ovs_header; | |
1866 | struct ovs_vport_stats vport_stats; | |
1867 | int err; | |
1868 | ||
15e47304 | 1869 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1870 | flags, cmd); |
1871 | if (!ovs_header) | |
1872 | return -EMSGSIZE; | |
1873 | ||
1874 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1875 | ||
028d6a67 DM |
1876 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1877 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 1878 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
c9db965c | 1879 | ovs_vport_name(vport))) |
028d6a67 | 1880 | goto nla_put_failure; |
ccb1352e JG |
1881 | |
1882 | ovs_vport_get_stats(vport, &vport_stats); | |
66c7a5ee ND |
1883 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1884 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1885 | OVS_VPORT_ATTR_PAD)) | |
028d6a67 | 1886 | goto nla_put_failure; |
ccb1352e | 1887 | |
5cd667b0 AW |
1888 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1889 | goto nla_put_failure; | |
1890 | ||
ccb1352e JG |
1891 | err = ovs_vport_get_options(vport, skb); |
1892 | if (err == -EMSGSIZE) | |
1893 | goto error; | |
1894 | ||
053c095a JB |
1895 | genlmsg_end(skb, ovs_header); |
1896 | return 0; | |
ccb1352e JG |
1897 | |
1898 | nla_put_failure: | |
1899 | err = -EMSGSIZE; | |
1900 | error: | |
1901 | genlmsg_cancel(skb, ovs_header); | |
1902 | return err; | |
1903 | } | |
1904 | ||
6093ae9a JR |
1905 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1906 | { | |
1907 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1908 | } | |
1909 | ||
1910 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
15e47304 | 1911 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1912 | u32 seq, u8 cmd) |
1913 | { | |
1914 | struct sk_buff *skb; | |
1915 | int retval; | |
1916 | ||
1917 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1918 | if (!skb) | |
1919 | return ERR_PTR(-ENOMEM); | |
1920 | ||
15e47304 | 1921 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1922 | BUG_ON(retval < 0); |
1923 | ||
ccb1352e JG |
1924 | return skb; |
1925 | } | |
1926 | ||
8e4e1713 | 1927 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 1928 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 1929 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1930 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1931 | { | |
1932 | struct datapath *dp; | |
1933 | struct vport *vport; | |
1934 | ||
1935 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1936 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1937 | if (!vport) |
1938 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1939 | if (ovs_header->dp_ifindex && |
1940 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1941 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1942 | return vport; |
1943 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1944 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1945 | ||
1946 | if (port_no >= DP_MAX_PORTS) | |
1947 | return ERR_PTR(-EFBIG); | |
1948 | ||
46df7b81 | 1949 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1950 | if (!dp) |
1951 | return ERR_PTR(-ENODEV); | |
1952 | ||
8e4e1713 | 1953 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1954 | if (!vport) |
14408dba | 1955 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1956 | return vport; |
1957 | } else | |
1958 | return ERR_PTR(-EINVAL); | |
1959 | } | |
1960 | ||
3a927bc7 PA |
1961 | /* Called with ovs_mutex */ |
1962 | static void update_headroom(struct datapath *dp) | |
1963 | { | |
1964 | unsigned dev_headroom, max_headroom = 0; | |
1965 | struct net_device *dev; | |
1966 | struct vport *vport; | |
1967 | int i; | |
1968 | ||
1969 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1970 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
1971 | dev = vport->dev; | |
1972 | dev_headroom = netdev_get_fwd_headroom(dev); | |
1973 | if (dev_headroom > max_headroom) | |
1974 | max_headroom = dev_headroom; | |
1975 | } | |
1976 | } | |
1977 | ||
1978 | dp->max_headroom = max_headroom; | |
1979 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1980 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) | |
1981 | netdev_set_rx_headroom(vport->dev, max_headroom); | |
1982 | } | |
1983 | ||
ccb1352e JG |
1984 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1985 | { | |
1986 | struct nlattr **a = info->attrs; | |
1987 | struct ovs_header *ovs_header = info->userhdr; | |
1988 | struct vport_parms parms; | |
1989 | struct sk_buff *reply; | |
1990 | struct vport *vport; | |
1991 | struct datapath *dp; | |
1992 | u32 port_no; | |
1993 | int err; | |
1994 | ||
ccb1352e JG |
1995 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1996 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a JR |
1997 | return -EINVAL; |
1998 | ||
1999 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2000 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2001 | if (port_no >= DP_MAX_PORTS) | |
2002 | return -EFBIG; | |
2003 | ||
2004 | reply = ovs_vport_cmd_alloc_info(); | |
2005 | if (!reply) | |
2006 | return -ENOMEM; | |
ccb1352e | 2007 | |
8e4e1713 | 2008 | ovs_lock(); |
62b9c8d0 | 2009 | restart: |
46df7b81 | 2010 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
2011 | err = -ENODEV; |
2012 | if (!dp) | |
6093ae9a | 2013 | goto exit_unlock_free; |
ccb1352e | 2014 | |
6093ae9a | 2015 | if (port_no) { |
8e4e1713 | 2016 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2017 | err = -EBUSY; |
2018 | if (vport) | |
6093ae9a | 2019 | goto exit_unlock_free; |
ccb1352e JG |
2020 | } else { |
2021 | for (port_no = 1; ; port_no++) { | |
2022 | if (port_no >= DP_MAX_PORTS) { | |
2023 | err = -EFBIG; | |
6093ae9a | 2024 | goto exit_unlock_free; |
ccb1352e | 2025 | } |
8e4e1713 | 2026 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2027 | if (!vport) |
2028 | break; | |
2029 | } | |
2030 | } | |
2031 | ||
2032 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2033 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2034 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2035 | parms.dp = dp; | |
2036 | parms.port_no = port_no; | |
5cd667b0 | 2037 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
2038 | |
2039 | vport = new_vport(&parms); | |
2040 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
2041 | if (IS_ERR(vport)) { |
2042 | if (err == -EAGAIN) | |
2043 | goto restart; | |
6093ae9a | 2044 | goto exit_unlock_free; |
62b9c8d0 | 2045 | } |
ccb1352e | 2046 | |
6093ae9a JR |
2047 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2048 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
3a927bc7 PA |
2049 | |
2050 | if (netdev_get_fwd_headroom(vport->dev) > dp->max_headroom) | |
2051 | update_headroom(dp); | |
2052 | else | |
2053 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2054 | ||
6093ae9a JR |
2055 | BUG_ON(err < 0); |
2056 | ovs_unlock(); | |
ed661185 | 2057 | |
2a94fe48 | 2058 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2059 | return 0; |
ccb1352e | 2060 | |
6093ae9a | 2061 | exit_unlock_free: |
8e4e1713 | 2062 | ovs_unlock(); |
6093ae9a | 2063 | kfree_skb(reply); |
ccb1352e JG |
2064 | return err; |
2065 | } | |
2066 | ||
2067 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2068 | { | |
2069 | struct nlattr **a = info->attrs; | |
2070 | struct sk_buff *reply; | |
2071 | struct vport *vport; | |
2072 | int err; | |
2073 | ||
6093ae9a JR |
2074 | reply = ovs_vport_cmd_alloc_info(); |
2075 | if (!reply) | |
2076 | return -ENOMEM; | |
2077 | ||
8e4e1713 | 2078 | ovs_lock(); |
46df7b81 | 2079 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2080 | err = PTR_ERR(vport); |
2081 | if (IS_ERR(vport)) | |
6093ae9a | 2082 | goto exit_unlock_free; |
ccb1352e | 2083 | |
ccb1352e | 2084 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2085 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2086 | err = -EINVAL; |
6093ae9a | 2087 | goto exit_unlock_free; |
a9341512 JG |
2088 | } |
2089 | ||
f44f3408 | 2090 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2091 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2092 | if (err) |
6093ae9a | 2093 | goto exit_unlock_free; |
f44f3408 | 2094 | } |
a9341512 | 2095 | |
5cd667b0 AW |
2096 | |
2097 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2098 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2099 | ||
2100 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2101 | if (err) | |
2102 | goto exit_unlock_free; | |
2103 | } | |
ccb1352e | 2104 | |
a9341512 JG |
2105 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2106 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2107 | BUG_ON(err < 0); | |
ccb1352e | 2108 | |
8e4e1713 | 2109 | ovs_unlock(); |
2a94fe48 | 2110 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2111 | return 0; |
ccb1352e | 2112 | |
6093ae9a | 2113 | exit_unlock_free: |
8e4e1713 | 2114 | ovs_unlock(); |
6093ae9a | 2115 | kfree_skb(reply); |
ccb1352e JG |
2116 | return err; |
2117 | } | |
2118 | ||
2119 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2120 | { | |
3a927bc7 | 2121 | bool must_update_headroom = false; |
ccb1352e JG |
2122 | struct nlattr **a = info->attrs; |
2123 | struct sk_buff *reply; | |
3a927bc7 | 2124 | struct datapath *dp; |
ccb1352e JG |
2125 | struct vport *vport; |
2126 | int err; | |
2127 | ||
6093ae9a JR |
2128 | reply = ovs_vport_cmd_alloc_info(); |
2129 | if (!reply) | |
2130 | return -ENOMEM; | |
2131 | ||
8e4e1713 | 2132 | ovs_lock(); |
46df7b81 | 2133 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2134 | err = PTR_ERR(vport); |
2135 | if (IS_ERR(vport)) | |
6093ae9a | 2136 | goto exit_unlock_free; |
ccb1352e JG |
2137 | |
2138 | if (vport->port_no == OVSP_LOCAL) { | |
2139 | err = -EINVAL; | |
6093ae9a | 2140 | goto exit_unlock_free; |
ccb1352e JG |
2141 | } |
2142 | ||
6093ae9a JR |
2143 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2144 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
2145 | BUG_ON(err < 0); | |
3a927bc7 PA |
2146 | |
2147 | /* the vport deletion may trigger dp headroom update */ | |
2148 | dp = vport->dp; | |
2149 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
2150 | must_update_headroom = true; | |
2151 | netdev_reset_rx_headroom(vport->dev); | |
ccb1352e | 2152 | ovs_dp_detach_port(vport); |
3a927bc7 PA |
2153 | |
2154 | if (must_update_headroom) | |
2155 | update_headroom(dp); | |
6093ae9a | 2156 | ovs_unlock(); |
ccb1352e | 2157 | |
2a94fe48 | 2158 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2159 | return 0; |
ccb1352e | 2160 | |
6093ae9a | 2161 | exit_unlock_free: |
8e4e1713 | 2162 | ovs_unlock(); |
6093ae9a | 2163 | kfree_skb(reply); |
ccb1352e JG |
2164 | return err; |
2165 | } | |
2166 | ||
2167 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2168 | { | |
2169 | struct nlattr **a = info->attrs; | |
2170 | struct ovs_header *ovs_header = info->userhdr; | |
2171 | struct sk_buff *reply; | |
2172 | struct vport *vport; | |
2173 | int err; | |
2174 | ||
6093ae9a JR |
2175 | reply = ovs_vport_cmd_alloc_info(); |
2176 | if (!reply) | |
2177 | return -ENOMEM; | |
2178 | ||
ccb1352e | 2179 | rcu_read_lock(); |
46df7b81 | 2180 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2181 | err = PTR_ERR(vport); |
2182 | if (IS_ERR(vport)) | |
6093ae9a JR |
2183 | goto exit_unlock_free; |
2184 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
2185 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2186 | BUG_ON(err < 0); | |
ccb1352e JG |
2187 | rcu_read_unlock(); |
2188 | ||
2189 | return genlmsg_reply(reply, info); | |
2190 | ||
6093ae9a | 2191 | exit_unlock_free: |
ccb1352e | 2192 | rcu_read_unlock(); |
6093ae9a | 2193 | kfree_skb(reply); |
ccb1352e JG |
2194 | return err; |
2195 | } | |
2196 | ||
2197 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2198 | { | |
2199 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2200 | struct datapath *dp; | |
15eac2a7 PS |
2201 | int bucket = cb->args[0], skip = cb->args[1]; |
2202 | int i, j = 0; | |
ccb1352e | 2203 | |
42ee19e2 | 2204 | rcu_read_lock(); |
cc3a5ae6 | 2205 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2206 | if (!dp) { |
2207 | rcu_read_unlock(); | |
ccb1352e | 2208 | return -ENODEV; |
42ee19e2 | 2209 | } |
15eac2a7 | 2210 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2211 | struct vport *vport; |
15eac2a7 PS |
2212 | |
2213 | j = 0; | |
b67bfe0d | 2214 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2215 | if (j >= skip && |
2216 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 2217 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2218 | cb->nlh->nlmsg_seq, |
2219 | NLM_F_MULTI, | |
2220 | OVS_VPORT_CMD_NEW) < 0) | |
2221 | goto out; | |
2222 | ||
2223 | j++; | |
2224 | } | |
2225 | skip = 0; | |
ccb1352e | 2226 | } |
15eac2a7 | 2227 | out: |
ccb1352e JG |
2228 | rcu_read_unlock(); |
2229 | ||
15eac2a7 PS |
2230 | cb->args[0] = i; |
2231 | cb->args[1] = j; | |
ccb1352e | 2232 | |
15eac2a7 | 2233 | return skb->len; |
ccb1352e JG |
2234 | } |
2235 | ||
0c200ef9 PS |
2236 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2237 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2238 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2239 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2240 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2241 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2242 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2243 | }; | |
2244 | ||
48e48a70 | 2245 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e | 2246 | { .cmd = OVS_VPORT_CMD_NEW, |
4a92602a | 2247 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2248 | .policy = vport_policy, |
2249 | .doit = ovs_vport_cmd_new | |
2250 | }, | |
2251 | { .cmd = OVS_VPORT_CMD_DEL, | |
4a92602a | 2252 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2253 | .policy = vport_policy, |
2254 | .doit = ovs_vport_cmd_del | |
2255 | }, | |
2256 | { .cmd = OVS_VPORT_CMD_GET, | |
2257 | .flags = 0, /* OK for unprivileged users. */ | |
2258 | .policy = vport_policy, | |
2259 | .doit = ovs_vport_cmd_get, | |
2260 | .dumpit = ovs_vport_cmd_dump | |
2261 | }, | |
2262 | { .cmd = OVS_VPORT_CMD_SET, | |
4a92602a | 2263 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2264 | .policy = vport_policy, |
2265 | .doit = ovs_vport_cmd_set, | |
2266 | }, | |
2267 | }; | |
2268 | ||
56989f6d | 2269 | struct genl_family dp_vport_genl_family __ro_after_init = { |
0c200ef9 PS |
2270 | .hdrsize = sizeof(struct ovs_header), |
2271 | .name = OVS_VPORT_FAMILY, | |
2272 | .version = OVS_VPORT_VERSION, | |
2273 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2274 | .netnsok = true, | |
2275 | .parallel_ops = true, | |
2276 | .ops = dp_vport_genl_ops, | |
2277 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2278 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2279 | .n_mcgrps = 1, | |
489111e5 | 2280 | .module = THIS_MODULE, |
ccb1352e JG |
2281 | }; |
2282 | ||
0c200ef9 PS |
2283 | static struct genl_family * const dp_genl_families[] = { |
2284 | &dp_datapath_genl_family, | |
2285 | &dp_vport_genl_family, | |
2286 | &dp_flow_genl_family, | |
2287 | &dp_packet_genl_family, | |
ccb1352e JG |
2288 | }; |
2289 | ||
2290 | static void dp_unregister_genl(int n_families) | |
2291 | { | |
2292 | int i; | |
2293 | ||
2294 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2295 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2296 | } |
2297 | ||
56989f6d | 2298 | static int __init dp_register_genl(void) |
ccb1352e | 2299 | { |
ccb1352e JG |
2300 | int err; |
2301 | int i; | |
2302 | ||
ccb1352e | 2303 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2304 | |
0c200ef9 | 2305 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2306 | if (err) |
2307 | goto error; | |
ccb1352e JG |
2308 | } |
2309 | ||
2310 | return 0; | |
2311 | ||
2312 | error: | |
0c200ef9 | 2313 | dp_unregister_genl(i); |
ccb1352e JG |
2314 | return err; |
2315 | } | |
2316 | ||
46df7b81 PS |
2317 | static int __net_init ovs_init_net(struct net *net) |
2318 | { | |
2319 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2320 | ||
2321 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2322 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
c2ac6673 | 2323 | ovs_ct_init(net); |
46df7b81 PS |
2324 | return 0; |
2325 | } | |
2326 | ||
7b4577a9 PS |
2327 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2328 | struct list_head *head) | |
46df7b81 | 2329 | { |
8e4e1713 | 2330 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2331 | struct datapath *dp; |
2332 | ||
2333 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2334 | int i; | |
2335 | ||
2336 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2337 | struct vport *vport; | |
2338 | ||
2339 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2340 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2341 | continue; | |
2342 | ||
be4ace6e | 2343 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2344 | list_add(&vport->detach_list, head); |
2345 | } | |
2346 | } | |
2347 | } | |
2348 | } | |
2349 | ||
2350 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2351 | { | |
2352 | struct datapath *dp, *dp_next; | |
2353 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2354 | struct vport *vport, *vport_next; | |
2355 | struct net *net; | |
2356 | LIST_HEAD(head); | |
46df7b81 | 2357 | |
c2ac6673 | 2358 | ovs_ct_exit(dnet); |
8e4e1713 | 2359 | ovs_lock(); |
46df7b81 PS |
2360 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2361 | __dp_destroy(dp); | |
7b4577a9 PS |
2362 | |
2363 | rtnl_lock(); | |
2364 | for_each_net(net) | |
2365 | list_vports_from_net(net, dnet, &head); | |
2366 | rtnl_unlock(); | |
2367 | ||
2368 | /* Detach all vports from given namespace. */ | |
2369 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2370 | list_del(&vport->detach_list); | |
2371 | ovs_dp_detach_port(vport); | |
2372 | } | |
2373 | ||
8e4e1713 PS |
2374 | ovs_unlock(); |
2375 | ||
2376 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2377 | } |
2378 | ||
2379 | static struct pernet_operations ovs_net_ops = { | |
2380 | .init = ovs_init_net, | |
2381 | .exit = ovs_exit_net, | |
2382 | .id = &ovs_net_id, | |
2383 | .size = sizeof(struct ovs_net), | |
2384 | }; | |
2385 | ||
ccb1352e JG |
2386 | static int __init dp_init(void) |
2387 | { | |
ccb1352e JG |
2388 | int err; |
2389 | ||
3523b29b | 2390 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2391 | |
2392 | pr_info("Open vSwitch switching datapath\n"); | |
2393 | ||
971427f3 | 2394 | err = action_fifos_init(); |
ccb1352e JG |
2395 | if (err) |
2396 | goto error; | |
2397 | ||
971427f3 AZ |
2398 | err = ovs_internal_dev_rtnl_link_register(); |
2399 | if (err) | |
2400 | goto error_action_fifos_exit; | |
2401 | ||
5b9e7e16 JP |
2402 | err = ovs_flow_init(); |
2403 | if (err) | |
2404 | goto error_unreg_rtnl_link; | |
2405 | ||
ccb1352e JG |
2406 | err = ovs_vport_init(); |
2407 | if (err) | |
2408 | goto error_flow_exit; | |
2409 | ||
46df7b81 | 2410 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2411 | if (err) |
2412 | goto error_vport_exit; | |
2413 | ||
46df7b81 PS |
2414 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2415 | if (err) | |
2416 | goto error_netns_exit; | |
2417 | ||
62b9c8d0 TG |
2418 | err = ovs_netdev_init(); |
2419 | if (err) | |
2420 | goto error_unreg_notifier; | |
2421 | ||
ccb1352e JG |
2422 | err = dp_register_genl(); |
2423 | if (err < 0) | |
62b9c8d0 | 2424 | goto error_unreg_netdev; |
ccb1352e | 2425 | |
ccb1352e JG |
2426 | return 0; |
2427 | ||
62b9c8d0 TG |
2428 | error_unreg_netdev: |
2429 | ovs_netdev_exit(); | |
ccb1352e JG |
2430 | error_unreg_notifier: |
2431 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2432 | error_netns_exit: |
2433 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2434 | error_vport_exit: |
2435 | ovs_vport_exit(); | |
2436 | error_flow_exit: | |
2437 | ovs_flow_exit(); | |
5b9e7e16 JP |
2438 | error_unreg_rtnl_link: |
2439 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2440 | error_action_fifos_exit: |
2441 | action_fifos_exit(); | |
ccb1352e JG |
2442 | error: |
2443 | return err; | |
2444 | } | |
2445 | ||
2446 | static void dp_cleanup(void) | |
2447 | { | |
ccb1352e | 2448 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2449 | ovs_netdev_exit(); |
ccb1352e | 2450 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2451 | unregister_pernet_device(&ovs_net_ops); |
2452 | rcu_barrier(); | |
ccb1352e JG |
2453 | ovs_vport_exit(); |
2454 | ovs_flow_exit(); | |
5b9e7e16 | 2455 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2456 | action_fifos_exit(); |
ccb1352e JG |
2457 | } |
2458 | ||
2459 | module_init(dp_init); | |
2460 | module_exit(dp_cleanup); | |
2461 | ||
2462 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2463 | MODULE_LICENSE("GPL"); | |
ed227099 TLSC |
2464 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2465 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2466 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2467 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); |