Commit | Line | Data |
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c9422999 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
ccb1352e | 2 | /* |
ad552007 | 3 | * Copyright (c) 2007-2014 Nicira, Inc. |
ccb1352e JG |
4 | */ |
5 | ||
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
7 | ||
8 | #include <linux/init.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/if_arp.h> | |
11 | #include <linux/if_vlan.h> | |
12 | #include <linux/in.h> | |
13 | #include <linux/ip.h> | |
14 | #include <linux/jhash.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/time.h> | |
17 | #include <linux/etherdevice.h> | |
18 | #include <linux/genetlink.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/kthread.h> | |
21 | #include <linux/mutex.h> | |
22 | #include <linux/percpu.h> | |
23 | #include <linux/rcupdate.h> | |
24 | #include <linux/tcp.h> | |
25 | #include <linux/udp.h> | |
ccb1352e JG |
26 | #include <linux/ethtool.h> |
27 | #include <linux/wait.h> | |
ccb1352e JG |
28 | #include <asm/div64.h> |
29 | #include <linux/highmem.h> | |
30 | #include <linux/netfilter_bridge.h> | |
31 | #include <linux/netfilter_ipv4.h> | |
32 | #include <linux/inetdevice.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/openvswitch.h> | |
35 | #include <linux/rculist.h> | |
36 | #include <linux/dmi.h> | |
ccb1352e | 37 | #include <net/genetlink.h> |
46df7b81 PS |
38 | #include <net/net_namespace.h> |
39 | #include <net/netns/generic.h> | |
ccb1352e JG |
40 | |
41 | #include "datapath.h" | |
42 | #include "flow.h" | |
e80857cc | 43 | #include "flow_table.h" |
e6445719 | 44 | #include "flow_netlink.h" |
96fbc13d | 45 | #include "meter.h" |
ccb1352e | 46 | #include "vport-internal_dev.h" |
cff63a52 | 47 | #include "vport-netdev.h" |
ccb1352e | 48 | |
c7d03a00 | 49 | unsigned int ovs_net_id __read_mostly; |
8e4e1713 | 50 | |
0c200ef9 PS |
51 | static struct genl_family dp_packet_genl_family; |
52 | static struct genl_family dp_flow_genl_family; | |
53 | static struct genl_family dp_datapath_genl_family; | |
54 | ||
74ed7ab9 JS |
55 | static const struct nla_policy flow_policy[]; |
56 | ||
48e48a70 | 57 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
58 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
59 | }; |
60 | ||
48e48a70 | 61 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
62 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
63 | }; |
64 | ||
48e48a70 | 65 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
66 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
67 | }; |
68 | ||
fb5d1e9e JR |
69 | /* Check if need to build a reply message. |
70 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
71 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
72 | unsigned int group) | |
fb5d1e9e JR |
73 | { |
74 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
f8403a2e | 75 | genl_has_listeners(family, genl_info_net(info), group); |
fb5d1e9e JR |
76 | } |
77 | ||
68eb5503 | 78 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 79 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 80 | { |
92c14d9b | 81 | genl_notify(family, skb, info, 0, GFP_KERNEL); |
ed661185 TG |
82 | } |
83 | ||
ccb1352e JG |
84 | /** |
85 | * DOC: Locking: | |
86 | * | |
8e4e1713 PS |
87 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
88 | * operations on vports, etc.), Writes to other state (flow table | |
89 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
90 | * by ovs_lock. | |
ccb1352e JG |
91 | * |
92 | * Reads are protected by RCU. | |
93 | * | |
94 | * There are a few special cases (mostly stats) that have their own | |
95 | * synchronization but they nest under all of above and don't interact with | |
96 | * each other. | |
8e4e1713 PS |
97 | * |
98 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
99 | */ |
100 | ||
8e4e1713 PS |
101 | static DEFINE_MUTEX(ovs_mutex); |
102 | ||
103 | void ovs_lock(void) | |
104 | { | |
105 | mutex_lock(&ovs_mutex); | |
106 | } | |
107 | ||
108 | void ovs_unlock(void) | |
109 | { | |
110 | mutex_unlock(&ovs_mutex); | |
111 | } | |
112 | ||
113 | #ifdef CONFIG_LOCKDEP | |
114 | int lockdep_ovsl_is_held(void) | |
115 | { | |
116 | if (debug_locks) | |
117 | return lockdep_is_held(&ovs_mutex); | |
118 | else | |
119 | return 1; | |
120 | } | |
121 | #endif | |
122 | ||
ccb1352e | 123 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 124 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 125 | const struct sw_flow_key *, |
f2a4d086 WT |
126 | const struct dp_upcall_info *, |
127 | uint32_t cutlen); | |
8055a89c | 128 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 129 | const struct sw_flow_key *, |
f2a4d086 WT |
130 | const struct dp_upcall_info *, |
131 | uint32_t cutlen); | |
ccb1352e | 132 | |
8e4e1713 | 133 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 134 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 135 | { |
8e4e1713 | 136 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
c9db965c | 137 | return ovs_vport_name(vport); |
ccb1352e JG |
138 | } |
139 | ||
12eb18f7 | 140 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
141 | { |
142 | struct vport *local; | |
143 | int ifindex; | |
144 | ||
145 | rcu_read_lock(); | |
146 | ||
15eac2a7 | 147 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 148 | if (local) |
be4ace6e | 149 | ifindex = local->dev->ifindex; |
ccb1352e JG |
150 | else |
151 | ifindex = 0; | |
152 | ||
153 | rcu_read_unlock(); | |
154 | ||
155 | return ifindex; | |
156 | } | |
157 | ||
158 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
159 | { | |
160 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
161 | ||
9b996e54 | 162 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 163 | free_percpu(dp->stats_percpu); |
15eac2a7 | 164 | kfree(dp->ports); |
96fbc13d | 165 | ovs_meters_exit(dp); |
ccb1352e JG |
166 | kfree(dp); |
167 | } | |
168 | ||
15eac2a7 PS |
169 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
170 | u16 port_no) | |
171 | { | |
172 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
173 | } | |
174 | ||
bb6f9a70 | 175 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
176 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
177 | { | |
178 | struct vport *vport; | |
15eac2a7 PS |
179 | struct hlist_head *head; |
180 | ||
181 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 182 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
183 | if (vport->port_no == port_no) |
184 | return vport; | |
185 | } | |
186 | return NULL; | |
187 | } | |
188 | ||
8e4e1713 | 189 | /* Called with ovs_mutex. */ |
ccb1352e JG |
190 | static struct vport *new_vport(const struct vport_parms *parms) |
191 | { | |
192 | struct vport *vport; | |
193 | ||
194 | vport = ovs_vport_add(parms); | |
195 | if (!IS_ERR(vport)) { | |
196 | struct datapath *dp = parms->dp; | |
15eac2a7 | 197 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 198 | |
15eac2a7 | 199 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 200 | } |
ccb1352e JG |
201 | return vport; |
202 | } | |
203 | ||
ccb1352e JG |
204 | void ovs_dp_detach_port(struct vport *p) |
205 | { | |
8e4e1713 | 206 | ASSERT_OVSL(); |
ccb1352e JG |
207 | |
208 | /* First drop references to device. */ | |
15eac2a7 | 209 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
210 | |
211 | /* Then destroy it. */ | |
212 | ovs_vport_del(p); | |
213 | } | |
214 | ||
215 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 216 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 217 | { |
83c8df26 | 218 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
219 | struct datapath *dp = p->dp; |
220 | struct sw_flow *flow; | |
d98612b8 | 221 | struct sw_flow_actions *sf_acts; |
ccb1352e | 222 | struct dp_stats_percpu *stats; |
ccb1352e | 223 | u64 *stats_counter; |
1bd7116f | 224 | u32 n_mask_hit; |
ccb1352e | 225 | |
404f2f10 | 226 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 227 | |
ccb1352e | 228 | /* Look up flow. */ |
8c8b1b83 | 229 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit); |
ccb1352e JG |
230 | if (unlikely(!flow)) { |
231 | struct dp_upcall_info upcall; | |
8c8b1b83 | 232 | int error; |
ccb1352e | 233 | |
ccea7445 | 234 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 235 | upcall.cmd = OVS_PACKET_CMD_MISS; |
5cd667b0 | 236 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
7f8a436e | 237 | upcall.mru = OVS_CB(skb)->mru; |
f2a4d086 | 238 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
c5eba0b6 LR |
239 | if (unlikely(error)) |
240 | kfree_skb(skb); | |
241 | else | |
242 | consume_skb(skb); | |
ccb1352e JG |
243 | stats_counter = &stats->n_missed; |
244 | goto out; | |
245 | } | |
246 | ||
d98612b8 LJ |
247 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
248 | sf_acts = rcu_dereference(flow->sf_acts); | |
249 | ovs_execute_actions(dp, skb, sf_acts, key); | |
ccb1352e | 250 | |
e298e505 | 251 | stats_counter = &stats->n_hit; |
ccb1352e JG |
252 | |
253 | out: | |
254 | /* Update datapath statistics. */ | |
df9d9fdf | 255 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 256 | (*stats_counter)++; |
1bd7116f | 257 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 258 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
259 | } |
260 | ||
ccb1352e | 261 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 262 | const struct sw_flow_key *key, |
f2a4d086 WT |
263 | const struct dp_upcall_info *upcall_info, |
264 | uint32_t cutlen) | |
ccb1352e JG |
265 | { |
266 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
267 | int err; |
268 | ||
15e47304 | 269 | if (upcall_info->portid == 0) { |
ccb1352e JG |
270 | err = -ENOTCONN; |
271 | goto err; | |
272 | } | |
273 | ||
ccb1352e | 274 | if (!skb_is_gso(skb)) |
f2a4d086 | 275 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e | 276 | else |
f2a4d086 | 277 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
278 | if (err) |
279 | goto err; | |
280 | ||
281 | return 0; | |
282 | ||
283 | err: | |
404f2f10 | 284 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 285 | |
df9d9fdf | 286 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 287 | stats->n_lost++; |
df9d9fdf | 288 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
289 | |
290 | return err; | |
291 | } | |
292 | ||
8055a89c | 293 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 294 | const struct sw_flow_key *key, |
f2a4d086 WT |
295 | const struct dp_upcall_info *upcall_info, |
296 | uint32_t cutlen) | |
ccb1352e | 297 | { |
2734166e | 298 | unsigned int gso_type = skb_shinfo(skb)->gso_type; |
0c19f846 | 299 | struct sw_flow_key later_key; |
ccb1352e JG |
300 | struct sk_buff *segs, *nskb; |
301 | int err; | |
302 | ||
9207f9d4 | 303 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET); |
09c5e605 | 304 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
305 | if (IS_ERR(segs)) |
306 | return PTR_ERR(segs); | |
330966e5 FW |
307 | if (segs == NULL) |
308 | return -EINVAL; | |
ccb1352e | 309 | |
0c19f846 WB |
310 | if (gso_type & SKB_GSO_UDP) { |
311 | /* The initial flow key extracted by ovs_flow_key_extract() | |
312 | * in this case is for a first fragment, so we need to | |
313 | * properly mark later fragments. | |
314 | */ | |
315 | later_key = *key; | |
316 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
317 | } | |
318 | ||
ccb1352e JG |
319 | /* Queue all of the segments. */ |
320 | skb = segs; | |
321 | do { | |
0c19f846 WB |
322 | if (gso_type & SKB_GSO_UDP && skb != segs) |
323 | key = &later_key; | |
324 | ||
f2a4d086 | 325 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
326 | if (err) |
327 | break; | |
328 | ||
ccb1352e JG |
329 | } while ((skb = skb->next)); |
330 | ||
331 | /* Free all of the segments. */ | |
332 | skb = segs; | |
333 | do { | |
334 | nskb = skb->next; | |
335 | if (err) | |
336 | kfree_skb(skb); | |
337 | else | |
338 | consume_skb(skb); | |
339 | } while ((skb = nskb)); | |
340 | return err; | |
341 | } | |
342 | ||
8f0aad6f | 343 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
494bea39 | 344 | unsigned int hdrlen, int actions_attrlen) |
c3ff8cfe TG |
345 | { |
346 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 347 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
b95e5928 WT |
348 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
349 | + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */ | |
c3ff8cfe TG |
350 | |
351 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
352 | if (upcall_info->userdata) |
353 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
354 | ||
355 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
356 | if (upcall_info->egress_tun_info) | |
357 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 358 | |
ccea7445 NM |
359 | /* OVS_PACKET_ATTR_ACTIONS */ |
360 | if (upcall_info->actions_len) | |
494bea39 | 361 | size += nla_total_size(actions_attrlen); |
ccea7445 | 362 | |
7f8a436e JS |
363 | /* OVS_PACKET_ATTR_MRU */ |
364 | if (upcall_info->mru) | |
365 | size += nla_total_size(sizeof(upcall_info->mru)); | |
366 | ||
c3ff8cfe TG |
367 | return size; |
368 | } | |
369 | ||
7f8a436e JS |
370 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
371 | { | |
372 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
373 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
374 | ||
375 | if (plen > 0) | |
b080db58 | 376 | skb_put_zero(skb, plen); |
7f8a436e JS |
377 | } |
378 | } | |
379 | ||
8055a89c | 380 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 381 | const struct sw_flow_key *key, |
f2a4d086 WT |
382 | const struct dp_upcall_info *upcall_info, |
383 | uint32_t cutlen) | |
ccb1352e JG |
384 | { |
385 | struct ovs_header *upcall; | |
386 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 387 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 388 | struct nlattr *nla; |
795449d8 | 389 | size_t len; |
bda56f14 | 390 | unsigned int hlen; |
8055a89c TG |
391 | int err, dp_ifindex; |
392 | ||
393 | dp_ifindex = get_dpifindex(dp); | |
394 | if (!dp_ifindex) | |
395 | return -ENODEV; | |
ccb1352e | 396 | |
df8a39de | 397 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
398 | nskb = skb_clone(skb, GFP_ATOMIC); |
399 | if (!nskb) | |
400 | return -ENOMEM; | |
401 | ||
5968250c | 402 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 403 | if (!nskb) |
ccb1352e JG |
404 | return -ENOMEM; |
405 | ||
ccb1352e JG |
406 | skb = nskb; |
407 | } | |
408 | ||
409 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
410 | err = -EFBIG; | |
411 | goto out; | |
412 | } | |
413 | ||
bda56f14 TG |
414 | /* Complete checksum if needed */ |
415 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
7529390d | 416 | (err = skb_csum_hwoffload_help(skb, 0))) |
bda56f14 TG |
417 | goto out; |
418 | ||
419 | /* Older versions of OVS user space enforce alignment of the last | |
420 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
421 | * padding logic. Only perform zerocopy if padding is not required. | |
422 | */ | |
423 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
424 | hlen = skb_zerocopy_headlen(skb); | |
425 | else | |
426 | hlen = skb->len; | |
427 | ||
494bea39 LZ |
428 | len = upcall_msg_size(upcall_info, hlen - cutlen, |
429 | OVS_CB(skb)->acts_origlen); | |
551ddc05 | 430 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
ccb1352e JG |
431 | if (!user_skb) { |
432 | err = -ENOMEM; | |
433 | goto out; | |
434 | } | |
435 | ||
436 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
437 | 0, upcall_info->cmd); | |
6f19893b KL |
438 | if (!upcall) { |
439 | err = -EINVAL; | |
440 | goto out; | |
441 | } | |
ccb1352e JG |
442 | upcall->dp_ifindex = dp_ifindex; |
443 | ||
5b4237bb | 444 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
a734d1f4 EC |
445 | if (err) |
446 | goto out; | |
ccb1352e JG |
447 | |
448 | if (upcall_info->userdata) | |
4490108b BP |
449 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
450 | nla_len(upcall_info->userdata), | |
451 | nla_data(upcall_info->userdata)); | |
ccb1352e | 452 | |
8f0aad6f | 453 | if (upcall_info->egress_tun_info) { |
ae0be8de MK |
454 | nla = nla_nest_start_noflag(user_skb, |
455 | OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
0fff9bd4 KL |
456 | if (!nla) { |
457 | err = -EMSGSIZE; | |
458 | goto out; | |
459 | } | |
fc4099f1 PS |
460 | err = ovs_nla_put_tunnel_info(user_skb, |
461 | upcall_info->egress_tun_info); | |
a734d1f4 EC |
462 | if (err) |
463 | goto out; | |
464 | ||
8f0aad6f WZ |
465 | nla_nest_end(user_skb, nla); |
466 | } | |
467 | ||
ccea7445 | 468 | if (upcall_info->actions_len) { |
ae0be8de | 469 | nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS); |
0fff9bd4 KL |
470 | if (!nla) { |
471 | err = -EMSGSIZE; | |
472 | goto out; | |
473 | } | |
ccea7445 NM |
474 | err = ovs_nla_put_actions(upcall_info->actions, |
475 | upcall_info->actions_len, | |
476 | user_skb); | |
477 | if (!err) | |
478 | nla_nest_end(user_skb, nla); | |
479 | else | |
480 | nla_nest_cancel(user_skb, nla); | |
481 | } | |
482 | ||
7f8a436e JS |
483 | /* Add OVS_PACKET_ATTR_MRU */ |
484 | if (upcall_info->mru) { | |
485 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
486 | upcall_info->mru)) { | |
487 | err = -ENOBUFS; | |
488 | goto out; | |
489 | } | |
490 | pad_packet(dp, user_skb); | |
491 | } | |
492 | ||
b95e5928 WT |
493 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
494 | if (cutlen > 0) { | |
495 | if (nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, | |
496 | skb->len)) { | |
497 | err = -ENOBUFS; | |
498 | goto out; | |
499 | } | |
500 | pad_packet(dp, user_skb); | |
501 | } | |
502 | ||
bda56f14 TG |
503 | /* Only reserve room for attribute header, packet data is added |
504 | * in skb_zerocopy() */ | |
505 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
506 | err = -ENOBUFS; | |
507 | goto out; | |
508 | } | |
f2a4d086 | 509 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
ccb1352e | 510 | |
f2a4d086 | 511 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
36d5fe6a ZK |
512 | if (err) |
513 | goto out; | |
ccb1352e | 514 | |
aea0bb4f | 515 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 516 | pad_packet(dp, user_skb); |
aea0bb4f | 517 | |
bda56f14 | 518 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 519 | |
bda56f14 | 520 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 521 | user_skb = NULL; |
ccb1352e | 522 | out: |
36d5fe6a ZK |
523 | if (err) |
524 | skb_tx_error(skb); | |
4ee45ea0 | 525 | kfree_skb(user_skb); |
ccb1352e JG |
526 | kfree_skb(nskb); |
527 | return err; | |
528 | } | |
529 | ||
ccb1352e JG |
530 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
531 | { | |
532 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 533 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
534 | struct nlattr **a = info->attrs; |
535 | struct sw_flow_actions *acts; | |
536 | struct sk_buff *packet; | |
537 | struct sw_flow *flow; | |
d98612b8 | 538 | struct sw_flow_actions *sf_acts; |
ccb1352e | 539 | struct datapath *dp; |
83c8df26 | 540 | struct vport *input_vport; |
7f8a436e | 541 | u16 mru = 0; |
ccb1352e JG |
542 | int len; |
543 | int err; | |
1ba39804 | 544 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
545 | |
546 | err = -EINVAL; | |
547 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 548 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
549 | goto err; |
550 | ||
551 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
552 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
553 | err = -ENOMEM; | |
554 | if (!packet) | |
555 | goto err; | |
556 | skb_reserve(packet, NET_IP_ALIGN); | |
557 | ||
32686a9d | 558 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e | 559 | |
7f8a436e JS |
560 | /* Set packet's mru */ |
561 | if (a[OVS_PACKET_ATTR_MRU]) { | |
562 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
563 | packet->ignore_df = 1; | |
564 | } | |
565 | OVS_CB(packet)->mru = mru; | |
566 | ||
ccb1352e | 567 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 568 | flow = ovs_flow_alloc(); |
ccb1352e JG |
569 | err = PTR_ERR(flow); |
570 | if (IS_ERR(flow)) | |
571 | goto err_kfree_skb; | |
572 | ||
c2ac6673 JS |
573 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
574 | packet, &flow->key, log); | |
ccb1352e JG |
575 | if (err) |
576 | goto err_flow_free; | |
577 | ||
7f8a436e | 578 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 579 | &flow->key, &acts, log); |
74f84a57 PS |
580 | if (err) |
581 | goto err_flow_free; | |
ccb1352e | 582 | |
f5796684 | 583 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 584 | packet->priority = flow->key.phy.priority; |
39c7caeb | 585 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
586 | |
587 | rcu_read_lock(); | |
7f8a436e | 588 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
589 | err = -ENODEV; |
590 | if (!dp) | |
591 | goto err_unlock; | |
592 | ||
83c8df26 PS |
593 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
594 | if (!input_vport) | |
595 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
596 | ||
597 | if (!input_vport) | |
598 | goto err_unlock; | |
599 | ||
7f8a436e | 600 | packet->dev = input_vport->dev; |
83c8df26 | 601 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 602 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 603 | |
ccb1352e | 604 | local_bh_disable(); |
d98612b8 | 605 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
606 | local_bh_enable(); |
607 | rcu_read_unlock(); | |
608 | ||
03f0d916 | 609 | ovs_flow_free(flow, false); |
ccb1352e JG |
610 | return err; |
611 | ||
612 | err_unlock: | |
613 | rcu_read_unlock(); | |
614 | err_flow_free: | |
03f0d916 | 615 | ovs_flow_free(flow, false); |
ccb1352e JG |
616 | err_kfree_skb: |
617 | kfree_skb(packet); | |
618 | err: | |
619 | return err; | |
620 | } | |
621 | ||
622 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 623 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
624 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
625 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 626 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 627 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
ccb1352e JG |
628 | }; |
629 | ||
4534de83 | 630 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e | 631 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
ef6243ac | 632 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 633 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
634 | .doit = ovs_packet_cmd_execute |
635 | } | |
636 | }; | |
637 | ||
56989f6d | 638 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
0c200ef9 PS |
639 | .hdrsize = sizeof(struct ovs_header), |
640 | .name = OVS_PACKET_FAMILY, | |
641 | .version = OVS_PACKET_VERSION, | |
642 | .maxattr = OVS_PACKET_ATTR_MAX, | |
3b0f31f2 | 643 | .policy = packet_policy, |
0c200ef9 PS |
644 | .netnsok = true, |
645 | .parallel_ops = true, | |
646 | .ops = dp_packet_genl_ops, | |
647 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
489111e5 | 648 | .module = THIS_MODULE, |
0c200ef9 PS |
649 | }; |
650 | ||
12eb18f7 | 651 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 652 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
653 | { |
654 | int i; | |
ccb1352e | 655 | |
1bd7116f AZ |
656 | memset(mega_stats, 0, sizeof(*mega_stats)); |
657 | ||
b637e498 | 658 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 659 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
660 | |
661 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 662 | |
ccb1352e JG |
663 | for_each_possible_cpu(i) { |
664 | const struct dp_stats_percpu *percpu_stats; | |
665 | struct dp_stats_percpu local_stats; | |
666 | unsigned int start; | |
667 | ||
668 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
669 | ||
670 | do { | |
57a7744e | 671 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 672 | local_stats = *percpu_stats; |
57a7744e | 673 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
674 | |
675 | stats->n_hit += local_stats.n_hit; | |
676 | stats->n_missed += local_stats.n_missed; | |
677 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 678 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
679 | } |
680 | } | |
681 | ||
74ed7ab9 JS |
682 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
683 | { | |
684 | return ovs_identifier_is_ufid(sfid) && | |
685 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
686 | } | |
687 | ||
688 | static bool should_fill_mask(uint32_t ufid_flags) | |
689 | { | |
690 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
691 | } | |
692 | ||
693 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 694 | { |
74ed7ab9 JS |
695 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
696 | } | |
697 | ||
698 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
699 | const struct sw_flow_id *sfid, | |
700 | uint32_t ufid_flags) | |
701 | { | |
702 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
703 | ||
704 | /* OVS_FLOW_ATTR_UFID */ | |
705 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
706 | len += nla_total_size(sfid->ufid_len); | |
707 | ||
708 | /* OVS_FLOW_ATTR_KEY */ | |
709 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
710 | len += nla_total_size(ovs_key_attr_size()); | |
711 | ||
712 | /* OVS_FLOW_ATTR_MASK */ | |
713 | if (should_fill_mask(ufid_flags)) | |
714 | len += nla_total_size(ovs_key_attr_size()); | |
715 | ||
716 | /* OVS_FLOW_ATTR_ACTIONS */ | |
717 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 718 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
719 | |
720 | return len | |
66c7a5ee | 721 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
c3ff8cfe | 722 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
66c7a5ee | 723 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
724 | } |
725 | ||
ca7105f2 JS |
726 | /* Called with ovs_mutex or RCU read lock. */ |
727 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
728 | struct sk_buff *skb) | |
729 | { | |
730 | struct ovs_flow_stats stats; | |
731 | __be16 tcp_flags; | |
732 | unsigned long used; | |
ccb1352e | 733 | |
e298e505 | 734 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 735 | |
028d6a67 | 736 | if (used && |
0238b720 ND |
737 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
738 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 739 | return -EMSGSIZE; |
ccb1352e | 740 | |
028d6a67 | 741 | if (stats.n_packets && |
66c7a5ee ND |
742 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
743 | sizeof(struct ovs_flow_stats), &stats, | |
744 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 745 | return -EMSGSIZE; |
ccb1352e | 746 | |
e298e505 PS |
747 | if ((u8)ntohs(tcp_flags) && |
748 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
749 | return -EMSGSIZE; |
750 | ||
751 | return 0; | |
752 | } | |
753 | ||
754 | /* Called with ovs_mutex or RCU read lock. */ | |
755 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
756 | struct sk_buff *skb, int skb_orig_len) | |
757 | { | |
758 | struct nlattr *start; | |
759 | int err; | |
ccb1352e JG |
760 | |
761 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
762 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
763 | * Netlink but individual action lists can be longer than | |
764 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
765 | * The userspace caller can always fetch the actions separately if it | |
766 | * really wants them. (Most userspace callers in fact don't care.) | |
767 | * | |
768 | * This can only fail for dump operations because the skb is always | |
769 | * properly sized for single flows. | |
770 | */ | |
ae0be8de | 771 | start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS); |
74f84a57 | 772 | if (start) { |
d57170b1 PS |
773 | const struct sw_flow_actions *sf_acts; |
774 | ||
663efa36 | 775 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
776 | err = ovs_nla_put_actions(sf_acts->actions, |
777 | sf_acts->actions_len, skb); | |
0e9796b4 | 778 | |
74f84a57 PS |
779 | if (!err) |
780 | nla_nest_end(skb, start); | |
781 | else { | |
782 | if (skb_orig_len) | |
ca7105f2 | 783 | return err; |
74f84a57 PS |
784 | |
785 | nla_nest_cancel(skb, start); | |
786 | } | |
ca7105f2 JS |
787 | } else if (skb_orig_len) { |
788 | return -EMSGSIZE; | |
789 | } | |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
794 | /* Called with ovs_mutex or RCU read lock. */ | |
795 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
796 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 797 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
798 | { |
799 | const int skb_orig_len = skb->len; | |
800 | struct ovs_header *ovs_header; | |
801 | int err; | |
802 | ||
803 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
804 | flags, cmd); | |
805 | if (!ovs_header) | |
806 | return -EMSGSIZE; | |
807 | ||
808 | ovs_header->dp_ifindex = dp_ifindex; | |
809 | ||
74ed7ab9 | 810 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
811 | if (err) |
812 | goto error; | |
813 | ||
74ed7ab9 JS |
814 | if (should_fill_key(&flow->id, ufid_flags)) { |
815 | err = ovs_nla_put_masked_key(flow, skb); | |
816 | if (err) | |
817 | goto error; | |
818 | } | |
819 | ||
820 | if (should_fill_mask(ufid_flags)) { | |
821 | err = ovs_nla_put_mask(flow, skb); | |
822 | if (err) | |
823 | goto error; | |
824 | } | |
ca7105f2 JS |
825 | |
826 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
827 | if (err) | |
828 | goto error; | |
829 | ||
74ed7ab9 JS |
830 | if (should_fill_actions(ufid_flags)) { |
831 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
832 | if (err) | |
833 | goto error; | |
834 | } | |
ccb1352e | 835 | |
053c095a JB |
836 | genlmsg_end(skb, ovs_header); |
837 | return 0; | |
ccb1352e | 838 | |
ccb1352e JG |
839 | error: |
840 | genlmsg_cancel(skb, ovs_header); | |
841 | return err; | |
842 | } | |
843 | ||
0e9796b4 JR |
844 | /* May not be called with RCU read lock. */ |
845 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 846 | const struct sw_flow_id *sfid, |
fb5d1e9e | 847 | struct genl_info *info, |
74ed7ab9 JS |
848 | bool always, |
849 | uint32_t ufid_flags) | |
ccb1352e | 850 | { |
fb5d1e9e | 851 | struct sk_buff *skb; |
74ed7ab9 | 852 | size_t len; |
ccb1352e | 853 | |
9b67aa4a | 854 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
855 | return NULL; |
856 | ||
74ed7ab9 | 857 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
551ddc05 | 858 | skb = genlmsg_new(len, GFP_KERNEL); |
fb5d1e9e JR |
859 | if (!skb) |
860 | return ERR_PTR(-ENOMEM); | |
861 | ||
862 | return skb; | |
ccb1352e JG |
863 | } |
864 | ||
0e9796b4 JR |
865 | /* Called with ovs_mutex. */ |
866 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
867 | int dp_ifindex, | |
868 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 869 | bool always, u32 ufid_flags) |
ccb1352e JG |
870 | { |
871 | struct sk_buff *skb; | |
872 | int retval; | |
873 | ||
74ed7ab9 JS |
874 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
875 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 876 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 877 | return skb; |
ccb1352e | 878 | |
0e9796b4 JR |
879 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
880 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 881 | cmd, ufid_flags); |
ccb1352e JG |
882 | BUG_ON(retval < 0); |
883 | return skb; | |
884 | } | |
885 | ||
37bdc87b | 886 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 887 | { |
7f8a436e | 888 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
889 | struct nlattr **a = info->attrs; |
890 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 891 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 892 | struct sw_flow_mask mask; |
ccb1352e JG |
893 | struct sk_buff *reply; |
894 | struct datapath *dp; | |
37bdc87b | 895 | struct sw_flow_actions *acts; |
03f0d916 | 896 | struct sw_flow_match match; |
74ed7ab9 | 897 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 898 | int error; |
05da5898 | 899 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 900 | |
893f139b | 901 | /* Must have key and actions. */ |
ccb1352e | 902 | error = -EINVAL; |
426cda5c | 903 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 904 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 905 | goto error; |
426cda5c JG |
906 | } |
907 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 908 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 909 | goto error; |
426cda5c | 910 | } |
03f0d916 | 911 | |
893f139b JR |
912 | /* Most of the time we need to allocate a new flow, do it before |
913 | * locking. | |
914 | */ | |
915 | new_flow = ovs_flow_alloc(); | |
916 | if (IS_ERR(new_flow)) { | |
917 | error = PTR_ERR(new_flow); | |
918 | goto error; | |
919 | } | |
920 | ||
921 | /* Extract key. */ | |
2279994d | 922 | ovs_match_init(&match, &new_flow->key, false, &mask); |
c2ac6673 | 923 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 924 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 925 | if (error) |
893f139b | 926 | goto err_kfree_flow; |
ccb1352e | 927 | |
74ed7ab9 JS |
928 | /* Extract flow identifier. */ |
929 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
190aa3e7 | 930 | &new_flow->key, log); |
74ed7ab9 JS |
931 | if (error) |
932 | goto err_kfree_flow; | |
74f84a57 | 933 | |
190aa3e7 | 934 | /* unmasked key is needed to match when ufid is not used. */ |
935 | if (ovs_identifier_is_key(&new_flow->id)) | |
936 | match.key = new_flow->id.unmasked_key; | |
937 | ||
938 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
939 | ||
893f139b | 940 | /* Validate actions. */ |
7f8a436e JS |
941 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
942 | &new_flow->key, &acts, log); | |
37bdc87b | 943 | if (error) { |
05da5898 | 944 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 945 | goto err_kfree_flow; |
893f139b JR |
946 | } |
947 | ||
74ed7ab9 JS |
948 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
949 | ufid_flags); | |
893f139b JR |
950 | if (IS_ERR(reply)) { |
951 | error = PTR_ERR(reply); | |
952 | goto err_kfree_acts; | |
ccb1352e JG |
953 | } |
954 | ||
8e4e1713 | 955 | ovs_lock(); |
7f8a436e | 956 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
957 | if (unlikely(!dp)) { |
958 | error = -ENODEV; | |
8e4e1713 | 959 | goto err_unlock_ovs; |
893f139b | 960 | } |
74ed7ab9 | 961 | |
03f0d916 | 962 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
963 | if (ovs_identifier_is_ufid(&new_flow->id)) |
964 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
965 | if (!flow) | |
190aa3e7 | 966 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
893f139b JR |
967 | if (likely(!flow)) { |
968 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
969 | |
970 | /* Put flow in bucket. */ | |
893f139b JR |
971 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
972 | if (unlikely(error)) { | |
618ed0c8 | 973 | acts = NULL; |
893f139b JR |
974 | goto err_unlock_ovs; |
975 | } | |
976 | ||
977 | if (unlikely(reply)) { | |
978 | error = ovs_flow_cmd_fill_info(new_flow, | |
979 | ovs_header->dp_ifindex, | |
980 | reply, info->snd_portid, | |
981 | info->snd_seq, 0, | |
74ed7ab9 JS |
982 | OVS_FLOW_CMD_NEW, |
983 | ufid_flags); | |
893f139b | 984 | BUG_ON(error < 0); |
618ed0c8 | 985 | } |
893f139b | 986 | ovs_unlock(); |
ccb1352e | 987 | } else { |
37bdc87b JR |
988 | struct sw_flow_actions *old_acts; |
989 | ||
ccb1352e JG |
990 | /* Bail out if we're not allowed to modify an existing flow. |
991 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
992 | * because Generic Netlink treats the latter as a dump | |
993 | * request. We also accept NLM_F_EXCL in case that bug ever | |
994 | * gets fixed. | |
995 | */ | |
893f139b JR |
996 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
997 | | NLM_F_EXCL))) { | |
998 | error = -EEXIST; | |
8e4e1713 | 999 | goto err_unlock_ovs; |
893f139b | 1000 | } |
74ed7ab9 JS |
1001 | /* The flow identifier has to be the same for flow updates. |
1002 | * Look for any overlapping flow. | |
1003 | */ | |
1004 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1005 | if (ovs_identifier_is_key(&flow->id)) | |
1006 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1007 | &match); | |
1008 | else /* UFID matches but key is different */ | |
1009 | flow = NULL; | |
4a46b24e AW |
1010 | if (!flow) { |
1011 | error = -ENOENT; | |
1012 | goto err_unlock_ovs; | |
1013 | } | |
893f139b | 1014 | } |
37bdc87b JR |
1015 | /* Update actions. */ |
1016 | old_acts = ovsl_dereference(flow->sf_acts); | |
1017 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1018 | |
893f139b JR |
1019 | if (unlikely(reply)) { |
1020 | error = ovs_flow_cmd_fill_info(flow, | |
1021 | ovs_header->dp_ifindex, | |
1022 | reply, info->snd_portid, | |
1023 | info->snd_seq, 0, | |
74ed7ab9 JS |
1024 | OVS_FLOW_CMD_NEW, |
1025 | ufid_flags); | |
893f139b JR |
1026 | BUG_ON(error < 0); |
1027 | } | |
1028 | ovs_unlock(); | |
37bdc87b | 1029 | |
34ae932a | 1030 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1031 | ovs_flow_free(new_flow, false); |
37bdc87b | 1032 | } |
893f139b JR |
1033 | |
1034 | if (reply) | |
1035 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1036 | return 0; |
1037 | ||
37bdc87b JR |
1038 | err_unlock_ovs: |
1039 | ovs_unlock(); | |
893f139b JR |
1040 | kfree_skb(reply); |
1041 | err_kfree_acts: | |
34ae932a | 1042 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1043 | err_kfree_flow: |
1044 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1045 | error: |
1046 | return error; | |
1047 | } | |
ccb1352e | 1048 | |
2fdb957d | 1049 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
7f8a436e JS |
1050 | static struct sw_flow_actions *get_flow_actions(struct net *net, |
1051 | const struct nlattr *a, | |
6b205b2c | 1052 | const struct sw_flow_key *key, |
05da5898 JR |
1053 | const struct sw_flow_mask *mask, |
1054 | bool log) | |
6b205b2c JG |
1055 | { |
1056 | struct sw_flow_actions *acts; | |
1057 | struct sw_flow_key masked_key; | |
1058 | int error; | |
1059 | ||
ae5f2fb1 | 1060 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1061 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1062 | if (error) { |
05da5898 JR |
1063 | OVS_NLERR(log, |
1064 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1065 | return ERR_PTR(error); |
1066 | } | |
1067 | ||
1068 | return acts; | |
1069 | } | |
1070 | ||
9cc9a5cb TZ |
1071 | /* Factor out match-init and action-copy to avoid |
1072 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1073 | * used to get actions, we new a function to save some | |
1074 | * stack space. | |
1075 | * | |
1076 | * If there are not key and action attrs, we return 0 | |
1077 | * directly. In the case, the caller will also not use the | |
1078 | * match as before. If there is action attr, we try to get | |
1079 | * actions and save them to *acts. Before returning from | |
1080 | * the function, we reset the match->mask pointer. Because | |
1081 | * we should not to return match object with dangling reference | |
1082 | * to mask. | |
1083 | * */ | |
1084 | static int ovs_nla_init_match_and_action(struct net *net, | |
1085 | struct sw_flow_match *match, | |
1086 | struct sw_flow_key *key, | |
1087 | struct nlattr **a, | |
1088 | struct sw_flow_actions **acts, | |
1089 | bool log) | |
1090 | { | |
1091 | struct sw_flow_mask mask; | |
1092 | int error = 0; | |
1093 | ||
1094 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1095 | ovs_match_init(match, key, true, &mask); | |
1096 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1097 | a[OVS_FLOW_ATTR_MASK], log); | |
1098 | if (error) | |
1099 | goto error; | |
1100 | } | |
1101 | ||
1102 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1103 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1104 | OVS_NLERR(log, | |
1105 | "Flow key attribute not present in set flow."); | |
5829e62a CJ |
1106 | error = -EINVAL; |
1107 | goto error; | |
9cc9a5cb TZ |
1108 | } |
1109 | ||
1110 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1111 | &mask, log); | |
1112 | if (IS_ERR(*acts)) { | |
1113 | error = PTR_ERR(*acts); | |
1114 | goto error; | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /* On success, error is 0. */ | |
1119 | error: | |
1120 | match->mask = NULL; | |
1121 | return error; | |
1122 | } | |
1123 | ||
37bdc87b JR |
1124 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1125 | { | |
7f8a436e | 1126 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1127 | struct nlattr **a = info->attrs; |
1128 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1129 | struct sw_flow_key key; |
37bdc87b | 1130 | struct sw_flow *flow; |
37bdc87b JR |
1131 | struct sk_buff *reply = NULL; |
1132 | struct datapath *dp; | |
893f139b | 1133 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1134 | struct sw_flow_match match; |
74ed7ab9 JS |
1135 | struct sw_flow_id sfid; |
1136 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
6f15cdbf | 1137 | int error = 0; |
05da5898 | 1138 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1139 | bool ufid_present; |
37bdc87b | 1140 | |
74ed7ab9 | 1141 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
9cc9a5cb | 1142 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
6f15cdbf SG |
1143 | OVS_NLERR(log, |
1144 | "Flow set message rejected, Key attribute missing."); | |
9cc9a5cb | 1145 | return -EINVAL; |
6f15cdbf | 1146 | } |
9cc9a5cb TZ |
1147 | |
1148 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1149 | &acts, log); | |
37bdc87b JR |
1150 | if (error) |
1151 | goto error; | |
1152 | ||
9cc9a5cb | 1153 | if (acts) { |
2fdb957d | 1154 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1155 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1156 | ufid_flags); | |
893f139b JR |
1157 | if (IS_ERR(reply)) { |
1158 | error = PTR_ERR(reply); | |
1159 | goto err_kfree_acts; | |
be52c9e9 | 1160 | } |
37bdc87b | 1161 | } |
0e9796b4 | 1162 | |
37bdc87b | 1163 | ovs_lock(); |
7f8a436e | 1164 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1165 | if (unlikely(!dp)) { |
1166 | error = -ENODEV; | |
37bdc87b | 1167 | goto err_unlock_ovs; |
893f139b | 1168 | } |
37bdc87b | 1169 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1170 | if (ufid_present) |
1171 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1172 | else | |
1173 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1174 | if (unlikely(!flow)) { |
1175 | error = -ENOENT; | |
37bdc87b | 1176 | goto err_unlock_ovs; |
893f139b | 1177 | } |
4a46b24e | 1178 | |
37bdc87b | 1179 | /* Update actions, if present. */ |
893f139b | 1180 | if (likely(acts)) { |
37bdc87b JR |
1181 | old_acts = ovsl_dereference(flow->sf_acts); |
1182 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1183 | |
1184 | if (unlikely(reply)) { | |
1185 | error = ovs_flow_cmd_fill_info(flow, | |
1186 | ovs_header->dp_ifindex, | |
1187 | reply, info->snd_portid, | |
1188 | info->snd_seq, 0, | |
804fe108 | 1189 | OVS_FLOW_CMD_SET, |
74ed7ab9 | 1190 | ufid_flags); |
893f139b JR |
1191 | BUG_ON(error < 0); |
1192 | } | |
1193 | } else { | |
1194 | /* Could not alloc without acts before locking. */ | |
1195 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
804fe108 | 1196 | info, OVS_FLOW_CMD_SET, false, |
74ed7ab9 JS |
1197 | ufid_flags); |
1198 | ||
b5ffe634 | 1199 | if (IS_ERR(reply)) { |
893f139b JR |
1200 | error = PTR_ERR(reply); |
1201 | goto err_unlock_ovs; | |
1202 | } | |
ccb1352e | 1203 | } |
37bdc87b | 1204 | |
37bdc87b JR |
1205 | /* Clear stats. */ |
1206 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1207 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1208 | ovs_unlock(); |
ccb1352e | 1209 | |
893f139b JR |
1210 | if (reply) |
1211 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1212 | if (old_acts) | |
34ae932a | 1213 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1214 | |
ccb1352e JG |
1215 | return 0; |
1216 | ||
8e4e1713 PS |
1217 | err_unlock_ovs: |
1218 | ovs_unlock(); | |
893f139b JR |
1219 | kfree_skb(reply); |
1220 | err_kfree_acts: | |
34ae932a | 1221 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1222 | error: |
1223 | return error; | |
1224 | } | |
1225 | ||
1226 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1227 | { | |
1228 | struct nlattr **a = info->attrs; | |
1229 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1230 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1231 | struct sw_flow_key key; |
1232 | struct sk_buff *reply; | |
1233 | struct sw_flow *flow; | |
1234 | struct datapath *dp; | |
03f0d916 | 1235 | struct sw_flow_match match; |
74ed7ab9 JS |
1236 | struct sw_flow_id ufid; |
1237 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1238 | int err = 0; | |
05da5898 | 1239 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1240 | bool ufid_present; |
ccb1352e | 1241 | |
74ed7ab9 JS |
1242 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1243 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1244 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 | 1245 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1246 | log); |
1247 | } else if (!ufid_present) { | |
05da5898 JR |
1248 | OVS_NLERR(log, |
1249 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1250 | err = -EINVAL; |
03f0d916 | 1251 | } |
ccb1352e JG |
1252 | if (err) |
1253 | return err; | |
1254 | ||
8e4e1713 | 1255 | ovs_lock(); |
46df7b81 | 1256 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1257 | if (!dp) { |
1258 | err = -ENODEV; | |
1259 | goto unlock; | |
1260 | } | |
ccb1352e | 1261 | |
74ed7ab9 JS |
1262 | if (ufid_present) |
1263 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1264 | else | |
1265 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1266 | if (!flow) { |
8e4e1713 PS |
1267 | err = -ENOENT; |
1268 | goto unlock; | |
1269 | } | |
ccb1352e | 1270 | |
0e9796b4 | 1271 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
804fe108 | 1272 | OVS_FLOW_CMD_GET, true, ufid_flags); |
8e4e1713 PS |
1273 | if (IS_ERR(reply)) { |
1274 | err = PTR_ERR(reply); | |
1275 | goto unlock; | |
1276 | } | |
ccb1352e | 1277 | |
8e4e1713 | 1278 | ovs_unlock(); |
ccb1352e | 1279 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1280 | unlock: |
1281 | ovs_unlock(); | |
1282 | return err; | |
ccb1352e JG |
1283 | } |
1284 | ||
1285 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1286 | { | |
1287 | struct nlattr **a = info->attrs; | |
1288 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1289 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1290 | struct sw_flow_key key; |
1291 | struct sk_buff *reply; | |
74ed7ab9 | 1292 | struct sw_flow *flow = NULL; |
ccb1352e | 1293 | struct datapath *dp; |
03f0d916 | 1294 | struct sw_flow_match match; |
74ed7ab9 JS |
1295 | struct sw_flow_id ufid; |
1296 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1297 | int err; |
05da5898 | 1298 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1299 | bool ufid_present; |
ccb1352e | 1300 | |
74ed7ab9 JS |
1301 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1302 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1303 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 JS |
1304 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1305 | NULL, log); | |
aed06778 JR |
1306 | if (unlikely(err)) |
1307 | return err; | |
1308 | } | |
1309 | ||
8e4e1713 | 1310 | ovs_lock(); |
46df7b81 | 1311 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1312 | if (unlikely(!dp)) { |
8e4e1713 PS |
1313 | err = -ENODEV; |
1314 | goto unlock; | |
1315 | } | |
46df7b81 | 1316 | |
74ed7ab9 | 1317 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1318 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1319 | goto unlock; |
1320 | } | |
03f0d916 | 1321 | |
74ed7ab9 JS |
1322 | if (ufid_present) |
1323 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1324 | else | |
1325 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1326 | if (unlikely(!flow)) { |
8e4e1713 PS |
1327 | err = -ENOENT; |
1328 | goto unlock; | |
1329 | } | |
ccb1352e | 1330 | |
b637e498 | 1331 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1332 | ovs_unlock(); |
ccb1352e | 1333 | |
aed06778 | 1334 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1335 | &flow->id, info, false, ufid_flags); |
aed06778 | 1336 | if (likely(reply)) { |
b90f5aa4 | 1337 | if (!IS_ERR(reply)) { |
aed06778 JR |
1338 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1339 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1340 | reply, info->snd_portid, | |
1341 | info->snd_seq, 0, | |
74ed7ab9 JS |
1342 | OVS_FLOW_CMD_DEL, |
1343 | ufid_flags); | |
aed06778 JR |
1344 | rcu_read_unlock(); |
1345 | BUG_ON(err < 0); | |
1346 | ||
1347 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1348 | } else { | |
1349 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1350 | } | |
fb5d1e9e | 1351 | } |
ccb1352e | 1352 | |
aed06778 | 1353 | ovs_flow_free(flow, true); |
ccb1352e | 1354 | return 0; |
8e4e1713 PS |
1355 | unlock: |
1356 | ovs_unlock(); | |
1357 | return err; | |
ccb1352e JG |
1358 | } |
1359 | ||
1360 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1361 | { | |
74ed7ab9 | 1362 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1363 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1364 | struct table_instance *ti; |
ccb1352e | 1365 | struct datapath *dp; |
74ed7ab9 JS |
1366 | u32 ufid_flags; |
1367 | int err; | |
1368 | ||
8cb08174 JB |
1369 | err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a, |
1370 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); | |
74ed7ab9 JS |
1371 | if (err) |
1372 | return err; | |
1373 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1374 | |
d57170b1 | 1375 | rcu_read_lock(); |
cc3a5ae6 | 1376 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1377 | if (!dp) { |
d57170b1 | 1378 | rcu_read_unlock(); |
ccb1352e | 1379 | return -ENODEV; |
8e4e1713 | 1380 | } |
ccb1352e | 1381 | |
b637e498 | 1382 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1383 | for (;;) { |
1384 | struct sw_flow *flow; | |
1385 | u32 bucket, obj; | |
1386 | ||
1387 | bucket = cb->args[0]; | |
1388 | obj = cb->args[1]; | |
b637e498 | 1389 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1390 | if (!flow) |
1391 | break; | |
1392 | ||
0e9796b4 | 1393 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1394 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1395 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1396 | OVS_FLOW_CMD_GET, ufid_flags) < 0) |
ccb1352e JG |
1397 | break; |
1398 | ||
1399 | cb->args[0] = bucket; | |
1400 | cb->args[1] = obj; | |
1401 | } | |
d57170b1 | 1402 | rcu_read_unlock(); |
ccb1352e JG |
1403 | return skb->len; |
1404 | } | |
1405 | ||
0c200ef9 PS |
1406 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1407 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1408 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1409 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1410 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1411 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1412 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1413 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1414 | }; |
1415 | ||
48e48a70 | 1416 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e | 1417 | { .cmd = OVS_FLOW_CMD_NEW, |
ef6243ac | 1418 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1419 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1420 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1421 | }, |
1422 | { .cmd = OVS_FLOW_CMD_DEL, | |
ef6243ac | 1423 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1424 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1425 | .doit = ovs_flow_cmd_del |
1426 | }, | |
1427 | { .cmd = OVS_FLOW_CMD_GET, | |
ef6243ac | 1428 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1429 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1430 | .doit = ovs_flow_cmd_get, |
1431 | .dumpit = ovs_flow_cmd_dump | |
1432 | }, | |
1433 | { .cmd = OVS_FLOW_CMD_SET, | |
ef6243ac | 1434 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1435 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1436 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1437 | }, |
1438 | }; | |
1439 | ||
56989f6d | 1440 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
ccb1352e | 1441 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1442 | .name = OVS_FLOW_FAMILY, |
1443 | .version = OVS_FLOW_VERSION, | |
1444 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3b0f31f2 | 1445 | .policy = flow_policy, |
3a4e0d6a PS |
1446 | .netnsok = true, |
1447 | .parallel_ops = true, | |
0c200ef9 PS |
1448 | .ops = dp_flow_genl_ops, |
1449 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1450 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1451 | .n_mcgrps = 1, | |
489111e5 | 1452 | .module = THIS_MODULE, |
ccb1352e JG |
1453 | }; |
1454 | ||
c3ff8cfe TG |
1455 | static size_t ovs_dp_cmd_msg_size(void) |
1456 | { | |
1457 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1458 | ||
1459 | msgsize += nla_total_size(IFNAMSIZ); | |
66c7a5ee ND |
1460 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1461 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
45fb9c35 | 1462 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1463 | |
1464 | return msgsize; | |
1465 | } | |
1466 | ||
8ec609d8 | 1467 | /* Called with ovs_mutex. */ |
ccb1352e | 1468 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1469 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1470 | { |
1471 | struct ovs_header *ovs_header; | |
1472 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1473 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1474 | int err; |
1475 | ||
15e47304 | 1476 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1477 | flags, cmd); |
1478 | if (!ovs_header) | |
1479 | goto error; | |
1480 | ||
1481 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1482 | ||
ccb1352e | 1483 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1484 | if (err) |
1485 | goto nla_put_failure; | |
1486 | ||
1bd7116f | 1487 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
66c7a5ee ND |
1488 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1489 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1bd7116f AZ |
1490 | goto nla_put_failure; |
1491 | ||
66c7a5ee ND |
1492 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1493 | sizeof(struct ovs_dp_megaflow_stats), | |
1494 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
028d6a67 | 1495 | goto nla_put_failure; |
ccb1352e | 1496 | |
43d4be9c TG |
1497 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1498 | goto nla_put_failure; | |
1499 | ||
053c095a JB |
1500 | genlmsg_end(skb, ovs_header); |
1501 | return 0; | |
ccb1352e JG |
1502 | |
1503 | nla_put_failure: | |
1504 | genlmsg_cancel(skb, ovs_header); | |
1505 | error: | |
1506 | return -EMSGSIZE; | |
1507 | } | |
1508 | ||
263ea090 | 1509 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
ccb1352e | 1510 | { |
551ddc05 | 1511 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1512 | } |
1513 | ||
bb6f9a70 | 1514 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1515 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1516 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1517 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1518 | { | |
1519 | struct datapath *dp; | |
1520 | ||
1521 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1522 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1523 | else { |
1524 | struct vport *vport; | |
1525 | ||
46df7b81 | 1526 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1527 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1528 | } |
1529 | return dp ? dp : ERR_PTR(-ENODEV); | |
1530 | } | |
1531 | ||
44da5ae5 TG |
1532 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1533 | { | |
1534 | struct datapath *dp; | |
1535 | ||
1536 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1537 | if (IS_ERR(dp)) |
44da5ae5 TG |
1538 | return; |
1539 | ||
1540 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1541 | dp->user_features = 0; | |
1542 | } | |
1543 | ||
12eb18f7 | 1544 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
43d4be9c TG |
1545 | { |
1546 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1547 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1548 | } | |
1549 | ||
ccb1352e JG |
1550 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1551 | { | |
1552 | struct nlattr **a = info->attrs; | |
1553 | struct vport_parms parms; | |
1554 | struct sk_buff *reply; | |
1555 | struct datapath *dp; | |
1556 | struct vport *vport; | |
46df7b81 | 1557 | struct ovs_net *ovs_net; |
15eac2a7 | 1558 | int err, i; |
ccb1352e JG |
1559 | |
1560 | err = -EINVAL; | |
1561 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1562 | goto err; | |
1563 | ||
263ea090 | 1564 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1565 | if (!reply) |
1566 | return -ENOMEM; | |
ccb1352e JG |
1567 | |
1568 | err = -ENOMEM; | |
1569 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1570 | if (dp == NULL) | |
6093ae9a | 1571 | goto err_free_reply; |
46df7b81 | 1572 | |
efd7ef1c | 1573 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1574 | |
1575 | /* Allocate table. */ | |
b637e498 PS |
1576 | err = ovs_flow_tbl_init(&dp->table); |
1577 | if (err) | |
ccb1352e JG |
1578 | goto err_free_dp; |
1579 | ||
1c213bd2 | 1580 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1581 | if (!dp->stats_percpu) { |
1582 | err = -ENOMEM; | |
1583 | goto err_destroy_table; | |
1584 | } | |
1585 | ||
6da2ec56 KC |
1586 | dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, |
1587 | sizeof(struct hlist_head), | |
1588 | GFP_KERNEL); | |
15eac2a7 PS |
1589 | if (!dp->ports) { |
1590 | err = -ENOMEM; | |
1591 | goto err_destroy_percpu; | |
1592 | } | |
1593 | ||
1594 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1595 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1596 | ||
96fbc13d AZ |
1597 | err = ovs_meters_init(dp); |
1598 | if (err) | |
1599 | goto err_destroy_ports_array; | |
1600 | ||
ccb1352e JG |
1601 | /* Set up our datapath device. */ |
1602 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1603 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1604 | parms.options = NULL; | |
1605 | parms.dp = dp; | |
1606 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1607 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1608 | |
43d4be9c TG |
1609 | ovs_dp_change(dp, a); |
1610 | ||
6093ae9a JR |
1611 | /* So far only local changes have been made, now need the lock. */ |
1612 | ovs_lock(); | |
1613 | ||
ccb1352e JG |
1614 | vport = new_vport(&parms); |
1615 | if (IS_ERR(vport)) { | |
1616 | err = PTR_ERR(vport); | |
1617 | if (err == -EBUSY) | |
1618 | err = -EEXIST; | |
1619 | ||
44da5ae5 TG |
1620 | if (err == -EEXIST) { |
1621 | /* An outdated user space instance that does not understand | |
1622 | * the concept of user_features has attempted to create a new | |
1623 | * datapath and is likely to reuse it. Drop all user features. | |
1624 | */ | |
1625 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1626 | ovs_dp_reset_user_features(skb, info); | |
1627 | } | |
1628 | ||
96fbc13d | 1629 | goto err_destroy_meters; |
ccb1352e JG |
1630 | } |
1631 | ||
6093ae9a JR |
1632 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1633 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1634 | BUG_ON(err < 0); | |
ccb1352e | 1635 | |
46df7b81 | 1636 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1637 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1638 | |
1639 | ovs_unlock(); | |
ccb1352e | 1640 | |
2a94fe48 | 1641 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1642 | return 0; |
1643 | ||
96fbc13d | 1644 | err_destroy_meters: |
6093ae9a | 1645 | ovs_unlock(); |
96fbc13d AZ |
1646 | ovs_meters_exit(dp); |
1647 | err_destroy_ports_array: | |
15eac2a7 | 1648 | kfree(dp->ports); |
ccb1352e JG |
1649 | err_destroy_percpu: |
1650 | free_percpu(dp->stats_percpu); | |
1651 | err_destroy_table: | |
9b996e54 | 1652 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e JG |
1653 | err_free_dp: |
1654 | kfree(dp); | |
6093ae9a JR |
1655 | err_free_reply: |
1656 | kfree_skb(reply); | |
ccb1352e JG |
1657 | err: |
1658 | return err; | |
1659 | } | |
1660 | ||
8e4e1713 | 1661 | /* Called with ovs_mutex. */ |
46df7b81 | 1662 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1663 | { |
15eac2a7 | 1664 | int i; |
ccb1352e | 1665 | |
15eac2a7 PS |
1666 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1667 | struct vport *vport; | |
b67bfe0d | 1668 | struct hlist_node *n; |
15eac2a7 | 1669 | |
b67bfe0d | 1670 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1671 | if (vport->port_no != OVSP_LOCAL) |
1672 | ovs_dp_detach_port(vport); | |
1673 | } | |
ccb1352e | 1674 | |
59a35d60 | 1675 | list_del_rcu(&dp->list_node); |
ccb1352e | 1676 | |
8e4e1713 | 1677 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1678 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1679 | */ |
8e4e1713 | 1680 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1681 | |
e80857cc | 1682 | /* RCU destroy the flow table */ |
ccb1352e | 1683 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1684 | } |
1685 | ||
1686 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1687 | { | |
1688 | struct sk_buff *reply; | |
1689 | struct datapath *dp; | |
1690 | int err; | |
1691 | ||
263ea090 | 1692 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1693 | if (!reply) |
1694 | return -ENOMEM; | |
1695 | ||
8e4e1713 | 1696 | ovs_lock(); |
46df7b81 PS |
1697 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1698 | err = PTR_ERR(dp); | |
1699 | if (IS_ERR(dp)) | |
6093ae9a | 1700 | goto err_unlock_free; |
46df7b81 | 1701 | |
6093ae9a JR |
1702 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1703 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1704 | BUG_ON(err < 0); | |
46df7b81 PS |
1705 | |
1706 | __dp_destroy(dp); | |
8e4e1713 | 1707 | ovs_unlock(); |
ccb1352e | 1708 | |
2a94fe48 | 1709 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1710 | |
1711 | return 0; | |
6093ae9a JR |
1712 | |
1713 | err_unlock_free: | |
8e4e1713 | 1714 | ovs_unlock(); |
6093ae9a | 1715 | kfree_skb(reply); |
8e4e1713 | 1716 | return err; |
ccb1352e JG |
1717 | } |
1718 | ||
1719 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1720 | { | |
1721 | struct sk_buff *reply; | |
1722 | struct datapath *dp; | |
1723 | int err; | |
1724 | ||
263ea090 | 1725 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1726 | if (!reply) |
1727 | return -ENOMEM; | |
1728 | ||
8e4e1713 | 1729 | ovs_lock(); |
46df7b81 | 1730 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1731 | err = PTR_ERR(dp); |
ccb1352e | 1732 | if (IS_ERR(dp)) |
6093ae9a | 1733 | goto err_unlock_free; |
ccb1352e | 1734 | |
43d4be9c TG |
1735 | ovs_dp_change(dp, info->attrs); |
1736 | ||
6093ae9a | 1737 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1738 | info->snd_seq, 0, OVS_DP_CMD_SET); |
6093ae9a | 1739 | BUG_ON(err < 0); |
ccb1352e | 1740 | |
8e4e1713 | 1741 | ovs_unlock(); |
2a94fe48 | 1742 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1743 | |
1744 | return 0; | |
6093ae9a JR |
1745 | |
1746 | err_unlock_free: | |
8e4e1713 | 1747 | ovs_unlock(); |
6093ae9a | 1748 | kfree_skb(reply); |
8e4e1713 | 1749 | return err; |
ccb1352e JG |
1750 | } |
1751 | ||
1752 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1753 | { | |
1754 | struct sk_buff *reply; | |
1755 | struct datapath *dp; | |
8e4e1713 | 1756 | int err; |
ccb1352e | 1757 | |
263ea090 | 1758 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1759 | if (!reply) |
1760 | return -ENOMEM; | |
1761 | ||
8ec609d8 | 1762 | ovs_lock(); |
46df7b81 | 1763 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1764 | if (IS_ERR(dp)) { |
1765 | err = PTR_ERR(dp); | |
6093ae9a | 1766 | goto err_unlock_free; |
8e4e1713 | 1767 | } |
6093ae9a | 1768 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1769 | info->snd_seq, 0, OVS_DP_CMD_GET); |
6093ae9a | 1770 | BUG_ON(err < 0); |
8ec609d8 | 1771 | ovs_unlock(); |
ccb1352e JG |
1772 | |
1773 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1774 | |
6093ae9a | 1775 | err_unlock_free: |
8ec609d8 | 1776 | ovs_unlock(); |
6093ae9a | 1777 | kfree_skb(reply); |
8e4e1713 | 1778 | return err; |
ccb1352e JG |
1779 | } |
1780 | ||
1781 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1782 | { | |
46df7b81 | 1783 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1784 | struct datapath *dp; |
1785 | int skip = cb->args[0]; | |
1786 | int i = 0; | |
1787 | ||
8ec609d8 PS |
1788 | ovs_lock(); |
1789 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1790 | if (i >= skip && |
15e47304 | 1791 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e | 1792 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1793 | OVS_DP_CMD_GET) < 0) |
ccb1352e JG |
1794 | break; |
1795 | i++; | |
1796 | } | |
8ec609d8 | 1797 | ovs_unlock(); |
ccb1352e JG |
1798 | |
1799 | cb->args[0] = i; | |
1800 | ||
1801 | return skb->len; | |
1802 | } | |
1803 | ||
0c200ef9 PS |
1804 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1805 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1806 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1807 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1808 | }; | |
1809 | ||
48e48a70 | 1810 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e | 1811 | { .cmd = OVS_DP_CMD_NEW, |
ef6243ac | 1812 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1813 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1814 | .doit = ovs_dp_cmd_new |
1815 | }, | |
1816 | { .cmd = OVS_DP_CMD_DEL, | |
ef6243ac | 1817 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1818 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1819 | .doit = ovs_dp_cmd_del |
1820 | }, | |
1821 | { .cmd = OVS_DP_CMD_GET, | |
ef6243ac | 1822 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1823 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1824 | .doit = ovs_dp_cmd_get, |
1825 | .dumpit = ovs_dp_cmd_dump | |
1826 | }, | |
1827 | { .cmd = OVS_DP_CMD_SET, | |
ef6243ac | 1828 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1829 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1830 | .doit = ovs_dp_cmd_set, |
1831 | }, | |
1832 | }; | |
1833 | ||
56989f6d | 1834 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
ccb1352e | 1835 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1836 | .name = OVS_DATAPATH_FAMILY, |
1837 | .version = OVS_DATAPATH_VERSION, | |
1838 | .maxattr = OVS_DP_ATTR_MAX, | |
3b0f31f2 | 1839 | .policy = datapath_policy, |
3a4e0d6a PS |
1840 | .netnsok = true, |
1841 | .parallel_ops = true, | |
0c200ef9 PS |
1842 | .ops = dp_datapath_genl_ops, |
1843 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1844 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1845 | .n_mcgrps = 1, | |
489111e5 | 1846 | .module = THIS_MODULE, |
ccb1352e JG |
1847 | }; |
1848 | ||
8e4e1713 | 1849 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1850 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
9354d452 JB |
1851 | struct net *net, u32 portid, u32 seq, |
1852 | u32 flags, u8 cmd) | |
ccb1352e JG |
1853 | { |
1854 | struct ovs_header *ovs_header; | |
1855 | struct ovs_vport_stats vport_stats; | |
1856 | int err; | |
1857 | ||
15e47304 | 1858 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1859 | flags, cmd); |
1860 | if (!ovs_header) | |
1861 | return -EMSGSIZE; | |
1862 | ||
1863 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1864 | ||
028d6a67 DM |
1865 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1866 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 1867 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
9354d452 JB |
1868 | ovs_vport_name(vport)) || |
1869 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
028d6a67 | 1870 | goto nla_put_failure; |
ccb1352e | 1871 | |
9354d452 JB |
1872 | if (!net_eq(net, dev_net(vport->dev))) { |
1873 | int id = peernet2id_alloc(net, dev_net(vport->dev)); | |
1874 | ||
1875 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
1876 | goto nla_put_failure; | |
1877 | } | |
1878 | ||
ccb1352e | 1879 | ovs_vport_get_stats(vport, &vport_stats); |
66c7a5ee ND |
1880 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1881 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1882 | OVS_VPORT_ATTR_PAD)) | |
028d6a67 | 1883 | goto nla_put_failure; |
ccb1352e | 1884 | |
5cd667b0 AW |
1885 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1886 | goto nla_put_failure; | |
1887 | ||
ccb1352e JG |
1888 | err = ovs_vport_get_options(vport, skb); |
1889 | if (err == -EMSGSIZE) | |
1890 | goto error; | |
1891 | ||
053c095a JB |
1892 | genlmsg_end(skb, ovs_header); |
1893 | return 0; | |
ccb1352e JG |
1894 | |
1895 | nla_put_failure: | |
1896 | err = -EMSGSIZE; | |
1897 | error: | |
1898 | genlmsg_cancel(skb, ovs_header); | |
1899 | return err; | |
1900 | } | |
1901 | ||
6093ae9a JR |
1902 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1903 | { | |
1904 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1905 | } | |
1906 | ||
1907 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
9354d452 JB |
1908 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, |
1909 | u32 portid, u32 seq, u8 cmd) | |
ccb1352e JG |
1910 | { |
1911 | struct sk_buff *skb; | |
1912 | int retval; | |
1913 | ||
1914 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1915 | if (!skb) | |
1916 | return ERR_PTR(-ENOMEM); | |
1917 | ||
9354d452 | 1918 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd); |
a9341512 JG |
1919 | BUG_ON(retval < 0); |
1920 | ||
ccb1352e JG |
1921 | return skb; |
1922 | } | |
1923 | ||
8e4e1713 | 1924 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 1925 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 1926 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1927 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1928 | { | |
1929 | struct datapath *dp; | |
1930 | struct vport *vport; | |
1931 | ||
9354d452 JB |
1932 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
1933 | return ERR_PTR(-EOPNOTSUPP); | |
ccb1352e | 1934 | if (a[OVS_VPORT_ATTR_NAME]) { |
46df7b81 | 1935 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1936 | if (!vport) |
1937 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1938 | if (ovs_header->dp_ifindex && |
1939 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1940 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1941 | return vport; |
1942 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1943 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1944 | ||
1945 | if (port_no >= DP_MAX_PORTS) | |
1946 | return ERR_PTR(-EFBIG); | |
1947 | ||
46df7b81 | 1948 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1949 | if (!dp) |
1950 | return ERR_PTR(-ENODEV); | |
1951 | ||
8e4e1713 | 1952 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1953 | if (!vport) |
14408dba | 1954 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1955 | return vport; |
1956 | } else | |
1957 | return ERR_PTR(-EINVAL); | |
9354d452 | 1958 | |
ccb1352e JG |
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 | 1997 | return -EINVAL; |
9354d452 JB |
1998 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
1999 | return -EOPNOTSUPP; | |
6093ae9a JR |
2000 | |
2001 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2002 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2003 | if (port_no >= DP_MAX_PORTS) | |
2004 | return -EFBIG; | |
2005 | ||
2006 | reply = ovs_vport_cmd_alloc_info(); | |
2007 | if (!reply) | |
2008 | return -ENOMEM; | |
ccb1352e | 2009 | |
8e4e1713 | 2010 | ovs_lock(); |
62b9c8d0 | 2011 | restart: |
46df7b81 | 2012 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
2013 | err = -ENODEV; |
2014 | if (!dp) | |
6093ae9a | 2015 | goto exit_unlock_free; |
ccb1352e | 2016 | |
6093ae9a | 2017 | if (port_no) { |
8e4e1713 | 2018 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2019 | err = -EBUSY; |
2020 | if (vport) | |
6093ae9a | 2021 | goto exit_unlock_free; |
ccb1352e JG |
2022 | } else { |
2023 | for (port_no = 1; ; port_no++) { | |
2024 | if (port_no >= DP_MAX_PORTS) { | |
2025 | err = -EFBIG; | |
6093ae9a | 2026 | goto exit_unlock_free; |
ccb1352e | 2027 | } |
8e4e1713 | 2028 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2029 | if (!vport) |
2030 | break; | |
2031 | } | |
2032 | } | |
2033 | ||
2034 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2035 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2036 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2037 | parms.dp = dp; | |
2038 | parms.port_no = port_no; | |
5cd667b0 | 2039 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
2040 | |
2041 | vport = new_vport(&parms); | |
2042 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
2043 | if (IS_ERR(vport)) { |
2044 | if (err == -EAGAIN) | |
2045 | goto restart; | |
6093ae9a | 2046 | goto exit_unlock_free; |
62b9c8d0 | 2047 | } |
ccb1352e | 2048 | |
9354d452 JB |
2049 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2050 | info->snd_portid, info->snd_seq, 0, | |
2051 | OVS_VPORT_CMD_NEW); | |
3a927bc7 PA |
2052 | |
2053 | if (netdev_get_fwd_headroom(vport->dev) > dp->max_headroom) | |
2054 | update_headroom(dp); | |
2055 | else | |
2056 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2057 | ||
6093ae9a JR |
2058 | BUG_ON(err < 0); |
2059 | ovs_unlock(); | |
ed661185 | 2060 | |
2a94fe48 | 2061 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2062 | return 0; |
ccb1352e | 2063 | |
6093ae9a | 2064 | exit_unlock_free: |
8e4e1713 | 2065 | ovs_unlock(); |
6093ae9a | 2066 | kfree_skb(reply); |
ccb1352e JG |
2067 | return err; |
2068 | } | |
2069 | ||
2070 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2071 | { | |
2072 | struct nlattr **a = info->attrs; | |
2073 | struct sk_buff *reply; | |
2074 | struct vport *vport; | |
2075 | int err; | |
2076 | ||
6093ae9a JR |
2077 | reply = ovs_vport_cmd_alloc_info(); |
2078 | if (!reply) | |
2079 | return -ENOMEM; | |
2080 | ||
8e4e1713 | 2081 | ovs_lock(); |
46df7b81 | 2082 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2083 | err = PTR_ERR(vport); |
2084 | if (IS_ERR(vport)) | |
6093ae9a | 2085 | goto exit_unlock_free; |
ccb1352e | 2086 | |
ccb1352e | 2087 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2088 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2089 | err = -EINVAL; |
6093ae9a | 2090 | goto exit_unlock_free; |
a9341512 JG |
2091 | } |
2092 | ||
f44f3408 | 2093 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2094 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2095 | if (err) |
6093ae9a | 2096 | goto exit_unlock_free; |
f44f3408 | 2097 | } |
a9341512 | 2098 | |
5cd667b0 AW |
2099 | |
2100 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2101 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2102 | ||
2103 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2104 | if (err) | |
2105 | goto exit_unlock_free; | |
2106 | } | |
ccb1352e | 2107 | |
9354d452 JB |
2108 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2109 | info->snd_portid, info->snd_seq, 0, | |
804fe108 | 2110 | OVS_VPORT_CMD_SET); |
a9341512 | 2111 | BUG_ON(err < 0); |
ccb1352e | 2112 | |
8e4e1713 | 2113 | ovs_unlock(); |
2a94fe48 | 2114 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2115 | return 0; |
ccb1352e | 2116 | |
6093ae9a | 2117 | exit_unlock_free: |
8e4e1713 | 2118 | ovs_unlock(); |
6093ae9a | 2119 | kfree_skb(reply); |
ccb1352e JG |
2120 | return err; |
2121 | } | |
2122 | ||
2123 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2124 | { | |
3a927bc7 | 2125 | bool must_update_headroom = false; |
ccb1352e JG |
2126 | struct nlattr **a = info->attrs; |
2127 | struct sk_buff *reply; | |
3a927bc7 | 2128 | struct datapath *dp; |
ccb1352e JG |
2129 | struct vport *vport; |
2130 | int err; | |
2131 | ||
6093ae9a JR |
2132 | reply = ovs_vport_cmd_alloc_info(); |
2133 | if (!reply) | |
2134 | return -ENOMEM; | |
2135 | ||
8e4e1713 | 2136 | ovs_lock(); |
46df7b81 | 2137 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2138 | err = PTR_ERR(vport); |
2139 | if (IS_ERR(vport)) | |
6093ae9a | 2140 | goto exit_unlock_free; |
ccb1352e JG |
2141 | |
2142 | if (vport->port_no == OVSP_LOCAL) { | |
2143 | err = -EINVAL; | |
6093ae9a | 2144 | goto exit_unlock_free; |
ccb1352e JG |
2145 | } |
2146 | ||
9354d452 JB |
2147 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2148 | info->snd_portid, info->snd_seq, 0, | |
2149 | OVS_VPORT_CMD_DEL); | |
6093ae9a | 2150 | BUG_ON(err < 0); |
3a927bc7 PA |
2151 | |
2152 | /* the vport deletion may trigger dp headroom update */ | |
2153 | dp = vport->dp; | |
2154 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
2155 | must_update_headroom = true; | |
2156 | netdev_reset_rx_headroom(vport->dev); | |
ccb1352e | 2157 | ovs_dp_detach_port(vport); |
3a927bc7 PA |
2158 | |
2159 | if (must_update_headroom) | |
2160 | update_headroom(dp); | |
6093ae9a | 2161 | ovs_unlock(); |
ccb1352e | 2162 | |
2a94fe48 | 2163 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2164 | return 0; |
ccb1352e | 2165 | |
6093ae9a | 2166 | exit_unlock_free: |
8e4e1713 | 2167 | ovs_unlock(); |
6093ae9a | 2168 | kfree_skb(reply); |
ccb1352e JG |
2169 | return err; |
2170 | } | |
2171 | ||
2172 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2173 | { | |
2174 | struct nlattr **a = info->attrs; | |
2175 | struct ovs_header *ovs_header = info->userhdr; | |
2176 | struct sk_buff *reply; | |
2177 | struct vport *vport; | |
2178 | int err; | |
2179 | ||
6093ae9a JR |
2180 | reply = ovs_vport_cmd_alloc_info(); |
2181 | if (!reply) | |
2182 | return -ENOMEM; | |
2183 | ||
ccb1352e | 2184 | rcu_read_lock(); |
46df7b81 | 2185 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2186 | err = PTR_ERR(vport); |
2187 | if (IS_ERR(vport)) | |
6093ae9a | 2188 | goto exit_unlock_free; |
9354d452 JB |
2189 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2190 | info->snd_portid, info->snd_seq, 0, | |
804fe108 | 2191 | OVS_VPORT_CMD_GET); |
6093ae9a | 2192 | BUG_ON(err < 0); |
ccb1352e JG |
2193 | rcu_read_unlock(); |
2194 | ||
2195 | return genlmsg_reply(reply, info); | |
2196 | ||
6093ae9a | 2197 | exit_unlock_free: |
ccb1352e | 2198 | rcu_read_unlock(); |
6093ae9a | 2199 | kfree_skb(reply); |
ccb1352e JG |
2200 | return err; |
2201 | } | |
2202 | ||
2203 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2204 | { | |
2205 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2206 | struct datapath *dp; | |
15eac2a7 PS |
2207 | int bucket = cb->args[0], skip = cb->args[1]; |
2208 | int i, j = 0; | |
ccb1352e | 2209 | |
42ee19e2 | 2210 | rcu_read_lock(); |
cc3a5ae6 | 2211 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2212 | if (!dp) { |
2213 | rcu_read_unlock(); | |
ccb1352e | 2214 | return -ENODEV; |
42ee19e2 | 2215 | } |
15eac2a7 | 2216 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2217 | struct vport *vport; |
15eac2a7 PS |
2218 | |
2219 | j = 0; | |
b67bfe0d | 2220 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2221 | if (j >= skip && |
2222 | ovs_vport_cmd_fill_info(vport, skb, | |
9354d452 | 2223 | sock_net(skb->sk), |
15e47304 | 2224 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2225 | cb->nlh->nlmsg_seq, |
2226 | NLM_F_MULTI, | |
804fe108 | 2227 | OVS_VPORT_CMD_GET) < 0) |
15eac2a7 PS |
2228 | goto out; |
2229 | ||
2230 | j++; | |
2231 | } | |
2232 | skip = 0; | |
ccb1352e | 2233 | } |
15eac2a7 | 2234 | out: |
ccb1352e JG |
2235 | rcu_read_unlock(); |
2236 | ||
15eac2a7 PS |
2237 | cb->args[0] = i; |
2238 | cb->args[1] = j; | |
ccb1352e | 2239 | |
15eac2a7 | 2240 | return skb->len; |
ccb1352e JG |
2241 | } |
2242 | ||
0c200ef9 PS |
2243 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2244 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2245 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2246 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2247 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2248 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2249 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
9354d452 JB |
2250 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, |
2251 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
0c200ef9 PS |
2252 | }; |
2253 | ||
48e48a70 | 2254 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e | 2255 | { .cmd = OVS_VPORT_CMD_NEW, |
ef6243ac | 2256 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2257 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2258 | .doit = ovs_vport_cmd_new |
2259 | }, | |
2260 | { .cmd = OVS_VPORT_CMD_DEL, | |
ef6243ac | 2261 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2262 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2263 | .doit = ovs_vport_cmd_del |
2264 | }, | |
2265 | { .cmd = OVS_VPORT_CMD_GET, | |
ef6243ac | 2266 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 2267 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
2268 | .doit = ovs_vport_cmd_get, |
2269 | .dumpit = ovs_vport_cmd_dump | |
2270 | }, | |
2271 | { .cmd = OVS_VPORT_CMD_SET, | |
ef6243ac | 2272 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2273 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2274 | .doit = ovs_vport_cmd_set, |
2275 | }, | |
2276 | }; | |
2277 | ||
56989f6d | 2278 | struct genl_family dp_vport_genl_family __ro_after_init = { |
0c200ef9 PS |
2279 | .hdrsize = sizeof(struct ovs_header), |
2280 | .name = OVS_VPORT_FAMILY, | |
2281 | .version = OVS_VPORT_VERSION, | |
2282 | .maxattr = OVS_VPORT_ATTR_MAX, | |
3b0f31f2 | 2283 | .policy = vport_policy, |
0c200ef9 PS |
2284 | .netnsok = true, |
2285 | .parallel_ops = true, | |
2286 | .ops = dp_vport_genl_ops, | |
2287 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2288 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2289 | .n_mcgrps = 1, | |
489111e5 | 2290 | .module = THIS_MODULE, |
ccb1352e JG |
2291 | }; |
2292 | ||
0c200ef9 PS |
2293 | static struct genl_family * const dp_genl_families[] = { |
2294 | &dp_datapath_genl_family, | |
2295 | &dp_vport_genl_family, | |
2296 | &dp_flow_genl_family, | |
2297 | &dp_packet_genl_family, | |
96fbc13d | 2298 | &dp_meter_genl_family, |
11efd5cb YHW |
2299 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
2300 | &dp_ct_limit_genl_family, | |
2301 | #endif | |
ccb1352e JG |
2302 | }; |
2303 | ||
2304 | static void dp_unregister_genl(int n_families) | |
2305 | { | |
2306 | int i; | |
2307 | ||
2308 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2309 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2310 | } |
2311 | ||
56989f6d | 2312 | static int __init dp_register_genl(void) |
ccb1352e | 2313 | { |
ccb1352e JG |
2314 | int err; |
2315 | int i; | |
2316 | ||
ccb1352e | 2317 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2318 | |
0c200ef9 | 2319 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2320 | if (err) |
2321 | goto error; | |
ccb1352e JG |
2322 | } |
2323 | ||
2324 | return 0; | |
2325 | ||
2326 | error: | |
0c200ef9 | 2327 | dp_unregister_genl(i); |
ccb1352e JG |
2328 | return err; |
2329 | } | |
2330 | ||
46df7b81 PS |
2331 | static int __net_init ovs_init_net(struct net *net) |
2332 | { | |
2333 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2334 | ||
2335 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2336 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
11efd5cb | 2337 | return ovs_ct_init(net); |
46df7b81 PS |
2338 | } |
2339 | ||
7b4577a9 PS |
2340 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2341 | struct list_head *head) | |
46df7b81 | 2342 | { |
8e4e1713 | 2343 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2344 | struct datapath *dp; |
2345 | ||
2346 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2347 | int i; | |
2348 | ||
2349 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2350 | struct vport *vport; | |
2351 | ||
2352 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2353 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2354 | continue; | |
2355 | ||
be4ace6e | 2356 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2357 | list_add(&vport->detach_list, head); |
2358 | } | |
2359 | } | |
2360 | } | |
2361 | } | |
2362 | ||
2363 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2364 | { | |
2365 | struct datapath *dp, *dp_next; | |
2366 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2367 | struct vport *vport, *vport_next; | |
2368 | struct net *net; | |
2369 | LIST_HEAD(head); | |
46df7b81 | 2370 | |
c2ac6673 | 2371 | ovs_ct_exit(dnet); |
8e4e1713 | 2372 | ovs_lock(); |
46df7b81 PS |
2373 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2374 | __dp_destroy(dp); | |
7b4577a9 | 2375 | |
f0b07bb1 | 2376 | down_read(&net_rwsem); |
7b4577a9 PS |
2377 | for_each_net(net) |
2378 | list_vports_from_net(net, dnet, &head); | |
f0b07bb1 | 2379 | up_read(&net_rwsem); |
7b4577a9 PS |
2380 | |
2381 | /* Detach all vports from given namespace. */ | |
2382 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2383 | list_del(&vport->detach_list); | |
2384 | ovs_dp_detach_port(vport); | |
2385 | } | |
2386 | ||
8e4e1713 PS |
2387 | ovs_unlock(); |
2388 | ||
2389 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2390 | } |
2391 | ||
2392 | static struct pernet_operations ovs_net_ops = { | |
2393 | .init = ovs_init_net, | |
2394 | .exit = ovs_exit_net, | |
2395 | .id = &ovs_net_id, | |
2396 | .size = sizeof(struct ovs_net), | |
2397 | }; | |
2398 | ||
ccb1352e JG |
2399 | static int __init dp_init(void) |
2400 | { | |
ccb1352e JG |
2401 | int err; |
2402 | ||
3523b29b | 2403 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2404 | |
2405 | pr_info("Open vSwitch switching datapath\n"); | |
2406 | ||
971427f3 | 2407 | err = action_fifos_init(); |
ccb1352e JG |
2408 | if (err) |
2409 | goto error; | |
2410 | ||
971427f3 AZ |
2411 | err = ovs_internal_dev_rtnl_link_register(); |
2412 | if (err) | |
2413 | goto error_action_fifos_exit; | |
2414 | ||
5b9e7e16 JP |
2415 | err = ovs_flow_init(); |
2416 | if (err) | |
2417 | goto error_unreg_rtnl_link; | |
2418 | ||
ccb1352e JG |
2419 | err = ovs_vport_init(); |
2420 | if (err) | |
2421 | goto error_flow_exit; | |
2422 | ||
46df7b81 | 2423 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2424 | if (err) |
2425 | goto error_vport_exit; | |
2426 | ||
46df7b81 PS |
2427 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2428 | if (err) | |
2429 | goto error_netns_exit; | |
2430 | ||
62b9c8d0 TG |
2431 | err = ovs_netdev_init(); |
2432 | if (err) | |
2433 | goto error_unreg_notifier; | |
2434 | ||
ccb1352e JG |
2435 | err = dp_register_genl(); |
2436 | if (err < 0) | |
62b9c8d0 | 2437 | goto error_unreg_netdev; |
ccb1352e | 2438 | |
ccb1352e JG |
2439 | return 0; |
2440 | ||
62b9c8d0 TG |
2441 | error_unreg_netdev: |
2442 | ovs_netdev_exit(); | |
ccb1352e JG |
2443 | error_unreg_notifier: |
2444 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2445 | error_netns_exit: |
2446 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2447 | error_vport_exit: |
2448 | ovs_vport_exit(); | |
2449 | error_flow_exit: | |
2450 | ovs_flow_exit(); | |
5b9e7e16 JP |
2451 | error_unreg_rtnl_link: |
2452 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2453 | error_action_fifos_exit: |
2454 | action_fifos_exit(); | |
ccb1352e JG |
2455 | error: |
2456 | return err; | |
2457 | } | |
2458 | ||
2459 | static void dp_cleanup(void) | |
2460 | { | |
ccb1352e | 2461 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2462 | ovs_netdev_exit(); |
ccb1352e | 2463 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2464 | unregister_pernet_device(&ovs_net_ops); |
2465 | rcu_barrier(); | |
ccb1352e JG |
2466 | ovs_vport_exit(); |
2467 | ovs_flow_exit(); | |
5b9e7e16 | 2468 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2469 | action_fifos_exit(); |
ccb1352e JG |
2470 | } |
2471 | ||
2472 | module_init(dp_init); | |
2473 | module_exit(dp_cleanup); | |
2474 | ||
2475 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2476 | MODULE_LICENSE("GPL"); | |
ed227099 TLSC |
2477 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2478 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2479 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2480 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
96fbc13d | 2481 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); |
11efd5cb | 2482 | MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); |