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; |
aa733660 | 225 | int error; |
ccb1352e | 226 | |
404f2f10 | 227 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 228 | |
ccb1352e | 229 | /* Look up flow. */ |
8c8b1b83 | 230 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit); |
ccb1352e JG |
231 | if (unlikely(!flow)) { |
232 | struct dp_upcall_info upcall; | |
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); | |
aa733660 YS |
249 | error = ovs_execute_actions(dp, skb, sf_acts, key); |
250 | if (unlikely(error)) | |
251 | net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n", | |
252 | ovs_dp_name(dp), error); | |
ccb1352e | 253 | |
e298e505 | 254 | stats_counter = &stats->n_hit; |
ccb1352e JG |
255 | |
256 | out: | |
257 | /* Update datapath statistics. */ | |
df9d9fdf | 258 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 259 | (*stats_counter)++; |
1bd7116f | 260 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 261 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
262 | } |
263 | ||
ccb1352e | 264 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 265 | const struct sw_flow_key *key, |
f2a4d086 WT |
266 | const struct dp_upcall_info *upcall_info, |
267 | uint32_t cutlen) | |
ccb1352e JG |
268 | { |
269 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
270 | int err; |
271 | ||
15e47304 | 272 | if (upcall_info->portid == 0) { |
ccb1352e JG |
273 | err = -ENOTCONN; |
274 | goto err; | |
275 | } | |
276 | ||
ccb1352e | 277 | if (!skb_is_gso(skb)) |
f2a4d086 | 278 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e | 279 | else |
f2a4d086 | 280 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
281 | if (err) |
282 | goto err; | |
283 | ||
284 | return 0; | |
285 | ||
286 | err: | |
404f2f10 | 287 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 288 | |
df9d9fdf | 289 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 290 | stats->n_lost++; |
df9d9fdf | 291 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
292 | |
293 | return err; | |
294 | } | |
295 | ||
8055a89c | 296 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 297 | const struct sw_flow_key *key, |
f2a4d086 WT |
298 | const struct dp_upcall_info *upcall_info, |
299 | uint32_t cutlen) | |
ccb1352e | 300 | { |
2734166e | 301 | unsigned int gso_type = skb_shinfo(skb)->gso_type; |
0c19f846 | 302 | struct sw_flow_key later_key; |
ccb1352e JG |
303 | struct sk_buff *segs, *nskb; |
304 | int err; | |
305 | ||
9207f9d4 | 306 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET); |
09c5e605 | 307 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
308 | if (IS_ERR(segs)) |
309 | return PTR_ERR(segs); | |
330966e5 FW |
310 | if (segs == NULL) |
311 | return -EINVAL; | |
ccb1352e | 312 | |
0c19f846 WB |
313 | if (gso_type & SKB_GSO_UDP) { |
314 | /* The initial flow key extracted by ovs_flow_key_extract() | |
315 | * in this case is for a first fragment, so we need to | |
316 | * properly mark later fragments. | |
317 | */ | |
318 | later_key = *key; | |
319 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
320 | } | |
321 | ||
ccb1352e JG |
322 | /* Queue all of the segments. */ |
323 | skb = segs; | |
324 | do { | |
0c19f846 WB |
325 | if (gso_type & SKB_GSO_UDP && skb != segs) |
326 | key = &later_key; | |
327 | ||
f2a4d086 | 328 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
329 | if (err) |
330 | break; | |
331 | ||
ccb1352e JG |
332 | } while ((skb = skb->next)); |
333 | ||
334 | /* Free all of the segments. */ | |
335 | skb = segs; | |
336 | do { | |
337 | nskb = skb->next; | |
338 | if (err) | |
339 | kfree_skb(skb); | |
340 | else | |
341 | consume_skb(skb); | |
342 | } while ((skb = nskb)); | |
343 | return err; | |
344 | } | |
345 | ||
8f0aad6f | 346 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
494bea39 | 347 | unsigned int hdrlen, int actions_attrlen) |
c3ff8cfe TG |
348 | { |
349 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 350 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
b95e5928 WT |
351 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
352 | + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */ | |
c3ff8cfe TG |
353 | |
354 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
355 | if (upcall_info->userdata) |
356 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
357 | ||
358 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
359 | if (upcall_info->egress_tun_info) | |
360 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 361 | |
ccea7445 NM |
362 | /* OVS_PACKET_ATTR_ACTIONS */ |
363 | if (upcall_info->actions_len) | |
494bea39 | 364 | size += nla_total_size(actions_attrlen); |
ccea7445 | 365 | |
7f8a436e JS |
366 | /* OVS_PACKET_ATTR_MRU */ |
367 | if (upcall_info->mru) | |
368 | size += nla_total_size(sizeof(upcall_info->mru)); | |
369 | ||
c3ff8cfe TG |
370 | return size; |
371 | } | |
372 | ||
7f8a436e JS |
373 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
374 | { | |
375 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
376 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
377 | ||
378 | if (plen > 0) | |
b080db58 | 379 | skb_put_zero(skb, plen); |
7f8a436e JS |
380 | } |
381 | } | |
382 | ||
8055a89c | 383 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 384 | const struct sw_flow_key *key, |
f2a4d086 WT |
385 | const struct dp_upcall_info *upcall_info, |
386 | uint32_t cutlen) | |
ccb1352e JG |
387 | { |
388 | struct ovs_header *upcall; | |
389 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 390 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 391 | struct nlattr *nla; |
795449d8 | 392 | size_t len; |
bda56f14 | 393 | unsigned int hlen; |
8055a89c TG |
394 | int err, dp_ifindex; |
395 | ||
396 | dp_ifindex = get_dpifindex(dp); | |
397 | if (!dp_ifindex) | |
398 | return -ENODEV; | |
ccb1352e | 399 | |
df8a39de | 400 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
401 | nskb = skb_clone(skb, GFP_ATOMIC); |
402 | if (!nskb) | |
403 | return -ENOMEM; | |
404 | ||
5968250c | 405 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 406 | if (!nskb) |
ccb1352e JG |
407 | return -ENOMEM; |
408 | ||
ccb1352e JG |
409 | skb = nskb; |
410 | } | |
411 | ||
412 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
413 | err = -EFBIG; | |
414 | goto out; | |
415 | } | |
416 | ||
bda56f14 TG |
417 | /* Complete checksum if needed */ |
418 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
7529390d | 419 | (err = skb_csum_hwoffload_help(skb, 0))) |
bda56f14 TG |
420 | goto out; |
421 | ||
422 | /* Older versions of OVS user space enforce alignment of the last | |
423 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
424 | * padding logic. Only perform zerocopy if padding is not required. | |
425 | */ | |
426 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
427 | hlen = skb_zerocopy_headlen(skb); | |
428 | else | |
429 | hlen = skb->len; | |
430 | ||
494bea39 LZ |
431 | len = upcall_msg_size(upcall_info, hlen - cutlen, |
432 | OVS_CB(skb)->acts_origlen); | |
551ddc05 | 433 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
ccb1352e JG |
434 | if (!user_skb) { |
435 | err = -ENOMEM; | |
436 | goto out; | |
437 | } | |
438 | ||
439 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
440 | 0, upcall_info->cmd); | |
6f19893b KL |
441 | if (!upcall) { |
442 | err = -EINVAL; | |
443 | goto out; | |
444 | } | |
ccb1352e JG |
445 | upcall->dp_ifindex = dp_ifindex; |
446 | ||
5b4237bb | 447 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
a734d1f4 EC |
448 | if (err) |
449 | goto out; | |
ccb1352e JG |
450 | |
451 | if (upcall_info->userdata) | |
4490108b BP |
452 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
453 | nla_len(upcall_info->userdata), | |
454 | nla_data(upcall_info->userdata)); | |
ccb1352e | 455 | |
8f0aad6f | 456 | if (upcall_info->egress_tun_info) { |
ae0be8de MK |
457 | nla = nla_nest_start_noflag(user_skb, |
458 | OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
0fff9bd4 KL |
459 | if (!nla) { |
460 | err = -EMSGSIZE; | |
461 | goto out; | |
462 | } | |
fc4099f1 PS |
463 | err = ovs_nla_put_tunnel_info(user_skb, |
464 | upcall_info->egress_tun_info); | |
a734d1f4 EC |
465 | if (err) |
466 | goto out; | |
467 | ||
8f0aad6f WZ |
468 | nla_nest_end(user_skb, nla); |
469 | } | |
470 | ||
ccea7445 | 471 | if (upcall_info->actions_len) { |
ae0be8de | 472 | nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS); |
0fff9bd4 KL |
473 | if (!nla) { |
474 | err = -EMSGSIZE; | |
475 | goto out; | |
476 | } | |
ccea7445 NM |
477 | err = ovs_nla_put_actions(upcall_info->actions, |
478 | upcall_info->actions_len, | |
479 | user_skb); | |
480 | if (!err) | |
481 | nla_nest_end(user_skb, nla); | |
482 | else | |
483 | nla_nest_cancel(user_skb, nla); | |
484 | } | |
485 | ||
7f8a436e JS |
486 | /* Add OVS_PACKET_ATTR_MRU */ |
487 | if (upcall_info->mru) { | |
488 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
489 | upcall_info->mru)) { | |
490 | err = -ENOBUFS; | |
491 | goto out; | |
492 | } | |
493 | pad_packet(dp, user_skb); | |
494 | } | |
495 | ||
b95e5928 WT |
496 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
497 | if (cutlen > 0) { | |
498 | if (nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, | |
499 | skb->len)) { | |
500 | err = -ENOBUFS; | |
501 | goto out; | |
502 | } | |
503 | pad_packet(dp, user_skb); | |
504 | } | |
505 | ||
bda56f14 TG |
506 | /* Only reserve room for attribute header, packet data is added |
507 | * in skb_zerocopy() */ | |
508 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
509 | err = -ENOBUFS; | |
510 | goto out; | |
511 | } | |
f2a4d086 | 512 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
ccb1352e | 513 | |
f2a4d086 | 514 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
36d5fe6a ZK |
515 | if (err) |
516 | goto out; | |
ccb1352e | 517 | |
aea0bb4f | 518 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 519 | pad_packet(dp, user_skb); |
aea0bb4f | 520 | |
bda56f14 | 521 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 522 | |
bda56f14 | 523 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 524 | user_skb = NULL; |
ccb1352e | 525 | out: |
36d5fe6a ZK |
526 | if (err) |
527 | skb_tx_error(skb); | |
4ee45ea0 | 528 | kfree_skb(user_skb); |
ccb1352e JG |
529 | kfree_skb(nskb); |
530 | return err; | |
531 | } | |
532 | ||
ccb1352e JG |
533 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
534 | { | |
535 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 536 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
537 | struct nlattr **a = info->attrs; |
538 | struct sw_flow_actions *acts; | |
539 | struct sk_buff *packet; | |
540 | struct sw_flow *flow; | |
d98612b8 | 541 | struct sw_flow_actions *sf_acts; |
ccb1352e | 542 | struct datapath *dp; |
83c8df26 | 543 | struct vport *input_vport; |
7f8a436e | 544 | u16 mru = 0; |
ccb1352e JG |
545 | int len; |
546 | int err; | |
1ba39804 | 547 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
548 | |
549 | err = -EINVAL; | |
550 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 551 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
552 | goto err; |
553 | ||
554 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
555 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
556 | err = -ENOMEM; | |
557 | if (!packet) | |
558 | goto err; | |
559 | skb_reserve(packet, NET_IP_ALIGN); | |
560 | ||
32686a9d | 561 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e | 562 | |
7f8a436e JS |
563 | /* Set packet's mru */ |
564 | if (a[OVS_PACKET_ATTR_MRU]) { | |
565 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
566 | packet->ignore_df = 1; | |
567 | } | |
568 | OVS_CB(packet)->mru = mru; | |
569 | ||
ccb1352e | 570 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 571 | flow = ovs_flow_alloc(); |
ccb1352e JG |
572 | err = PTR_ERR(flow); |
573 | if (IS_ERR(flow)) | |
574 | goto err_kfree_skb; | |
575 | ||
c2ac6673 JS |
576 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
577 | packet, &flow->key, log); | |
ccb1352e JG |
578 | if (err) |
579 | goto err_flow_free; | |
580 | ||
7f8a436e | 581 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 582 | &flow->key, &acts, log); |
74f84a57 PS |
583 | if (err) |
584 | goto err_flow_free; | |
ccb1352e | 585 | |
f5796684 | 586 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 587 | packet->priority = flow->key.phy.priority; |
39c7caeb | 588 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
589 | |
590 | rcu_read_lock(); | |
7f8a436e | 591 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
592 | err = -ENODEV; |
593 | if (!dp) | |
594 | goto err_unlock; | |
595 | ||
83c8df26 PS |
596 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
597 | if (!input_vport) | |
598 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
599 | ||
600 | if (!input_vport) | |
601 | goto err_unlock; | |
602 | ||
7f8a436e | 603 | packet->dev = input_vport->dev; |
83c8df26 | 604 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 605 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 606 | |
ccb1352e | 607 | local_bh_disable(); |
d98612b8 | 608 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
609 | local_bh_enable(); |
610 | rcu_read_unlock(); | |
611 | ||
03f0d916 | 612 | ovs_flow_free(flow, false); |
ccb1352e JG |
613 | return err; |
614 | ||
615 | err_unlock: | |
616 | rcu_read_unlock(); | |
617 | err_flow_free: | |
03f0d916 | 618 | ovs_flow_free(flow, false); |
ccb1352e JG |
619 | err_kfree_skb: |
620 | kfree_skb(packet); | |
621 | err: | |
622 | return err; | |
623 | } | |
624 | ||
625 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 626 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
627 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
628 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 629 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 630 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
ccb1352e JG |
631 | }; |
632 | ||
4534de83 | 633 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e | 634 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
ef6243ac | 635 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 636 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
637 | .doit = ovs_packet_cmd_execute |
638 | } | |
639 | }; | |
640 | ||
56989f6d | 641 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
0c200ef9 PS |
642 | .hdrsize = sizeof(struct ovs_header), |
643 | .name = OVS_PACKET_FAMILY, | |
644 | .version = OVS_PACKET_VERSION, | |
645 | .maxattr = OVS_PACKET_ATTR_MAX, | |
3b0f31f2 | 646 | .policy = packet_policy, |
0c200ef9 PS |
647 | .netnsok = true, |
648 | .parallel_ops = true, | |
649 | .ops = dp_packet_genl_ops, | |
650 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
489111e5 | 651 | .module = THIS_MODULE, |
0c200ef9 PS |
652 | }; |
653 | ||
12eb18f7 | 654 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 655 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
656 | { |
657 | int i; | |
ccb1352e | 658 | |
1bd7116f AZ |
659 | memset(mega_stats, 0, sizeof(*mega_stats)); |
660 | ||
b637e498 | 661 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 662 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
663 | |
664 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 665 | |
ccb1352e JG |
666 | for_each_possible_cpu(i) { |
667 | const struct dp_stats_percpu *percpu_stats; | |
668 | struct dp_stats_percpu local_stats; | |
669 | unsigned int start; | |
670 | ||
671 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
672 | ||
673 | do { | |
57a7744e | 674 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 675 | local_stats = *percpu_stats; |
57a7744e | 676 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
677 | |
678 | stats->n_hit += local_stats.n_hit; | |
679 | stats->n_missed += local_stats.n_missed; | |
680 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 681 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
682 | } |
683 | } | |
684 | ||
74ed7ab9 JS |
685 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
686 | { | |
687 | return ovs_identifier_is_ufid(sfid) && | |
688 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
689 | } | |
690 | ||
691 | static bool should_fill_mask(uint32_t ufid_flags) | |
692 | { | |
693 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
694 | } | |
695 | ||
696 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 697 | { |
74ed7ab9 JS |
698 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
699 | } | |
700 | ||
701 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
702 | const struct sw_flow_id *sfid, | |
703 | uint32_t ufid_flags) | |
704 | { | |
705 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
706 | ||
707 | /* OVS_FLOW_ATTR_UFID */ | |
708 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
709 | len += nla_total_size(sfid->ufid_len); | |
710 | ||
711 | /* OVS_FLOW_ATTR_KEY */ | |
712 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
713 | len += nla_total_size(ovs_key_attr_size()); | |
714 | ||
715 | /* OVS_FLOW_ATTR_MASK */ | |
716 | if (should_fill_mask(ufid_flags)) | |
717 | len += nla_total_size(ovs_key_attr_size()); | |
718 | ||
719 | /* OVS_FLOW_ATTR_ACTIONS */ | |
720 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 721 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
722 | |
723 | return len | |
66c7a5ee | 724 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
c3ff8cfe | 725 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
66c7a5ee | 726 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
727 | } |
728 | ||
ca7105f2 JS |
729 | /* Called with ovs_mutex or RCU read lock. */ |
730 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
731 | struct sk_buff *skb) | |
732 | { | |
733 | struct ovs_flow_stats stats; | |
734 | __be16 tcp_flags; | |
735 | unsigned long used; | |
ccb1352e | 736 | |
e298e505 | 737 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 738 | |
028d6a67 | 739 | if (used && |
0238b720 ND |
740 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
741 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 742 | return -EMSGSIZE; |
ccb1352e | 743 | |
028d6a67 | 744 | if (stats.n_packets && |
66c7a5ee ND |
745 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
746 | sizeof(struct ovs_flow_stats), &stats, | |
747 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 748 | return -EMSGSIZE; |
ccb1352e | 749 | |
e298e505 PS |
750 | if ((u8)ntohs(tcp_flags) && |
751 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
752 | return -EMSGSIZE; |
753 | ||
754 | return 0; | |
755 | } | |
756 | ||
757 | /* Called with ovs_mutex or RCU read lock. */ | |
758 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
759 | struct sk_buff *skb, int skb_orig_len) | |
760 | { | |
761 | struct nlattr *start; | |
762 | int err; | |
ccb1352e JG |
763 | |
764 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
765 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
766 | * Netlink but individual action lists can be longer than | |
767 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
768 | * The userspace caller can always fetch the actions separately if it | |
769 | * really wants them. (Most userspace callers in fact don't care.) | |
770 | * | |
771 | * This can only fail for dump operations because the skb is always | |
772 | * properly sized for single flows. | |
773 | */ | |
ae0be8de | 774 | start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS); |
74f84a57 | 775 | if (start) { |
d57170b1 PS |
776 | const struct sw_flow_actions *sf_acts; |
777 | ||
663efa36 | 778 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
779 | err = ovs_nla_put_actions(sf_acts->actions, |
780 | sf_acts->actions_len, skb); | |
0e9796b4 | 781 | |
74f84a57 PS |
782 | if (!err) |
783 | nla_nest_end(skb, start); | |
784 | else { | |
785 | if (skb_orig_len) | |
ca7105f2 | 786 | return err; |
74f84a57 PS |
787 | |
788 | nla_nest_cancel(skb, start); | |
789 | } | |
ca7105f2 JS |
790 | } else if (skb_orig_len) { |
791 | return -EMSGSIZE; | |
792 | } | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
797 | /* Called with ovs_mutex or RCU read lock. */ | |
798 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
799 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 800 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
801 | { |
802 | const int skb_orig_len = skb->len; | |
803 | struct ovs_header *ovs_header; | |
804 | int err; | |
805 | ||
806 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
807 | flags, cmd); | |
808 | if (!ovs_header) | |
809 | return -EMSGSIZE; | |
810 | ||
811 | ovs_header->dp_ifindex = dp_ifindex; | |
812 | ||
74ed7ab9 | 813 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
814 | if (err) |
815 | goto error; | |
816 | ||
74ed7ab9 JS |
817 | if (should_fill_key(&flow->id, ufid_flags)) { |
818 | err = ovs_nla_put_masked_key(flow, skb); | |
819 | if (err) | |
820 | goto error; | |
821 | } | |
822 | ||
823 | if (should_fill_mask(ufid_flags)) { | |
824 | err = ovs_nla_put_mask(flow, skb); | |
825 | if (err) | |
826 | goto error; | |
827 | } | |
ca7105f2 JS |
828 | |
829 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
830 | if (err) | |
831 | goto error; | |
832 | ||
74ed7ab9 JS |
833 | if (should_fill_actions(ufid_flags)) { |
834 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
835 | if (err) | |
836 | goto error; | |
837 | } | |
ccb1352e | 838 | |
053c095a JB |
839 | genlmsg_end(skb, ovs_header); |
840 | return 0; | |
ccb1352e | 841 | |
ccb1352e JG |
842 | error: |
843 | genlmsg_cancel(skb, ovs_header); | |
844 | return err; | |
845 | } | |
846 | ||
0e9796b4 JR |
847 | /* May not be called with RCU read lock. */ |
848 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 849 | const struct sw_flow_id *sfid, |
fb5d1e9e | 850 | struct genl_info *info, |
74ed7ab9 JS |
851 | bool always, |
852 | uint32_t ufid_flags) | |
ccb1352e | 853 | { |
fb5d1e9e | 854 | struct sk_buff *skb; |
74ed7ab9 | 855 | size_t len; |
ccb1352e | 856 | |
9b67aa4a | 857 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
858 | return NULL; |
859 | ||
74ed7ab9 | 860 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
551ddc05 | 861 | skb = genlmsg_new(len, GFP_KERNEL); |
fb5d1e9e JR |
862 | if (!skb) |
863 | return ERR_PTR(-ENOMEM); | |
864 | ||
865 | return skb; | |
ccb1352e JG |
866 | } |
867 | ||
0e9796b4 JR |
868 | /* Called with ovs_mutex. */ |
869 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
870 | int dp_ifindex, | |
871 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 872 | bool always, u32 ufid_flags) |
ccb1352e JG |
873 | { |
874 | struct sk_buff *skb; | |
875 | int retval; | |
876 | ||
74ed7ab9 JS |
877 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
878 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 879 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 880 | return skb; |
ccb1352e | 881 | |
0e9796b4 JR |
882 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
883 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 884 | cmd, ufid_flags); |
ccb1352e JG |
885 | BUG_ON(retval < 0); |
886 | return skb; | |
887 | } | |
888 | ||
37bdc87b | 889 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 890 | { |
7f8a436e | 891 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
892 | struct nlattr **a = info->attrs; |
893 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 894 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 895 | struct sw_flow_mask mask; |
ccb1352e JG |
896 | struct sk_buff *reply; |
897 | struct datapath *dp; | |
37bdc87b | 898 | struct sw_flow_actions *acts; |
03f0d916 | 899 | struct sw_flow_match match; |
74ed7ab9 | 900 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 901 | int error; |
05da5898 | 902 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 903 | |
893f139b | 904 | /* Must have key and actions. */ |
ccb1352e | 905 | error = -EINVAL; |
426cda5c | 906 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 907 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 908 | goto error; |
426cda5c JG |
909 | } |
910 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 911 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 912 | goto error; |
426cda5c | 913 | } |
03f0d916 | 914 | |
893f139b JR |
915 | /* Most of the time we need to allocate a new flow, do it before |
916 | * locking. | |
917 | */ | |
918 | new_flow = ovs_flow_alloc(); | |
919 | if (IS_ERR(new_flow)) { | |
920 | error = PTR_ERR(new_flow); | |
921 | goto error; | |
922 | } | |
923 | ||
924 | /* Extract key. */ | |
2279994d | 925 | ovs_match_init(&match, &new_flow->key, false, &mask); |
c2ac6673 | 926 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 927 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 928 | if (error) |
893f139b | 929 | goto err_kfree_flow; |
ccb1352e | 930 | |
74ed7ab9 JS |
931 | /* Extract flow identifier. */ |
932 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
190aa3e7 | 933 | &new_flow->key, log); |
74ed7ab9 JS |
934 | if (error) |
935 | goto err_kfree_flow; | |
74f84a57 | 936 | |
190aa3e7 | 937 | /* unmasked key is needed to match when ufid is not used. */ |
938 | if (ovs_identifier_is_key(&new_flow->id)) | |
939 | match.key = new_flow->id.unmasked_key; | |
940 | ||
941 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
942 | ||
893f139b | 943 | /* Validate actions. */ |
7f8a436e JS |
944 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
945 | &new_flow->key, &acts, log); | |
37bdc87b | 946 | if (error) { |
05da5898 | 947 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 948 | goto err_kfree_flow; |
893f139b JR |
949 | } |
950 | ||
74ed7ab9 JS |
951 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
952 | ufid_flags); | |
893f139b JR |
953 | if (IS_ERR(reply)) { |
954 | error = PTR_ERR(reply); | |
955 | goto err_kfree_acts; | |
ccb1352e JG |
956 | } |
957 | ||
8e4e1713 | 958 | ovs_lock(); |
7f8a436e | 959 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
960 | if (unlikely(!dp)) { |
961 | error = -ENODEV; | |
8e4e1713 | 962 | goto err_unlock_ovs; |
893f139b | 963 | } |
74ed7ab9 | 964 | |
03f0d916 | 965 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
966 | if (ovs_identifier_is_ufid(&new_flow->id)) |
967 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
968 | if (!flow) | |
190aa3e7 | 969 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
893f139b JR |
970 | if (likely(!flow)) { |
971 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
972 | |
973 | /* Put flow in bucket. */ | |
893f139b JR |
974 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
975 | if (unlikely(error)) { | |
618ed0c8 | 976 | acts = NULL; |
893f139b JR |
977 | goto err_unlock_ovs; |
978 | } | |
979 | ||
980 | if (unlikely(reply)) { | |
981 | error = ovs_flow_cmd_fill_info(new_flow, | |
982 | ovs_header->dp_ifindex, | |
983 | reply, info->snd_portid, | |
984 | info->snd_seq, 0, | |
74ed7ab9 JS |
985 | OVS_FLOW_CMD_NEW, |
986 | ufid_flags); | |
893f139b | 987 | BUG_ON(error < 0); |
618ed0c8 | 988 | } |
893f139b | 989 | ovs_unlock(); |
ccb1352e | 990 | } else { |
37bdc87b JR |
991 | struct sw_flow_actions *old_acts; |
992 | ||
ccb1352e JG |
993 | /* Bail out if we're not allowed to modify an existing flow. |
994 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
995 | * because Generic Netlink treats the latter as a dump | |
996 | * request. We also accept NLM_F_EXCL in case that bug ever | |
997 | * gets fixed. | |
998 | */ | |
893f139b JR |
999 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1000 | | NLM_F_EXCL))) { | |
1001 | error = -EEXIST; | |
8e4e1713 | 1002 | goto err_unlock_ovs; |
893f139b | 1003 | } |
74ed7ab9 JS |
1004 | /* The flow identifier has to be the same for flow updates. |
1005 | * Look for any overlapping flow. | |
1006 | */ | |
1007 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1008 | if (ovs_identifier_is_key(&flow->id)) | |
1009 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1010 | &match); | |
1011 | else /* UFID matches but key is different */ | |
1012 | flow = NULL; | |
4a46b24e AW |
1013 | if (!flow) { |
1014 | error = -ENOENT; | |
1015 | goto err_unlock_ovs; | |
1016 | } | |
893f139b | 1017 | } |
37bdc87b JR |
1018 | /* Update actions. */ |
1019 | old_acts = ovsl_dereference(flow->sf_acts); | |
1020 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1021 | |
893f139b JR |
1022 | if (unlikely(reply)) { |
1023 | error = ovs_flow_cmd_fill_info(flow, | |
1024 | ovs_header->dp_ifindex, | |
1025 | reply, info->snd_portid, | |
1026 | info->snd_seq, 0, | |
74ed7ab9 JS |
1027 | OVS_FLOW_CMD_NEW, |
1028 | ufid_flags); | |
893f139b JR |
1029 | BUG_ON(error < 0); |
1030 | } | |
1031 | ovs_unlock(); | |
37bdc87b | 1032 | |
34ae932a | 1033 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1034 | ovs_flow_free(new_flow, false); |
37bdc87b | 1035 | } |
893f139b JR |
1036 | |
1037 | if (reply) | |
1038 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1039 | return 0; |
1040 | ||
37bdc87b JR |
1041 | err_unlock_ovs: |
1042 | ovs_unlock(); | |
893f139b JR |
1043 | kfree_skb(reply); |
1044 | err_kfree_acts: | |
34ae932a | 1045 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1046 | err_kfree_flow: |
1047 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1048 | error: |
1049 | return error; | |
1050 | } | |
ccb1352e | 1051 | |
2fdb957d | 1052 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
26063790 | 1053 | static noinline_for_stack struct sw_flow_actions *get_flow_actions(struct net *net, |
7f8a436e | 1054 | const struct nlattr *a, |
6b205b2c | 1055 | const struct sw_flow_key *key, |
05da5898 JR |
1056 | const struct sw_flow_mask *mask, |
1057 | bool log) | |
6b205b2c JG |
1058 | { |
1059 | struct sw_flow_actions *acts; | |
1060 | struct sw_flow_key masked_key; | |
1061 | int error; | |
1062 | ||
ae5f2fb1 | 1063 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1064 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1065 | if (error) { |
05da5898 JR |
1066 | OVS_NLERR(log, |
1067 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1068 | return ERR_PTR(error); |
1069 | } | |
1070 | ||
1071 | return acts; | |
1072 | } | |
1073 | ||
9cc9a5cb TZ |
1074 | /* Factor out match-init and action-copy to avoid |
1075 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1076 | * used to get actions, we new a function to save some | |
1077 | * stack space. | |
1078 | * | |
1079 | * If there are not key and action attrs, we return 0 | |
1080 | * directly. In the case, the caller will also not use the | |
1081 | * match as before. If there is action attr, we try to get | |
1082 | * actions and save them to *acts. Before returning from | |
1083 | * the function, we reset the match->mask pointer. Because | |
1084 | * we should not to return match object with dangling reference | |
1085 | * to mask. | |
1086 | * */ | |
26063790 AB |
1087 | static noinline_for_stack int |
1088 | ovs_nla_init_match_and_action(struct net *net, | |
1089 | struct sw_flow_match *match, | |
1090 | struct sw_flow_key *key, | |
1091 | struct nlattr **a, | |
1092 | struct sw_flow_actions **acts, | |
1093 | bool log) | |
9cc9a5cb TZ |
1094 | { |
1095 | struct sw_flow_mask mask; | |
1096 | int error = 0; | |
1097 | ||
1098 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1099 | ovs_match_init(match, key, true, &mask); | |
1100 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1101 | a[OVS_FLOW_ATTR_MASK], log); | |
1102 | if (error) | |
1103 | goto error; | |
1104 | } | |
1105 | ||
1106 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1107 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1108 | OVS_NLERR(log, | |
1109 | "Flow key attribute not present in set flow."); | |
5829e62a CJ |
1110 | error = -EINVAL; |
1111 | goto error; | |
9cc9a5cb TZ |
1112 | } |
1113 | ||
1114 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1115 | &mask, log); | |
1116 | if (IS_ERR(*acts)) { | |
1117 | error = PTR_ERR(*acts); | |
1118 | goto error; | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | /* On success, error is 0. */ | |
1123 | error: | |
1124 | match->mask = NULL; | |
1125 | return error; | |
1126 | } | |
1127 | ||
37bdc87b JR |
1128 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1129 | { | |
7f8a436e | 1130 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1131 | struct nlattr **a = info->attrs; |
1132 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1133 | struct sw_flow_key key; |
37bdc87b | 1134 | struct sw_flow *flow; |
37bdc87b JR |
1135 | struct sk_buff *reply = NULL; |
1136 | struct datapath *dp; | |
893f139b | 1137 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1138 | struct sw_flow_match match; |
74ed7ab9 JS |
1139 | struct sw_flow_id sfid; |
1140 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
6f15cdbf | 1141 | int error = 0; |
05da5898 | 1142 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1143 | bool ufid_present; |
37bdc87b | 1144 | |
74ed7ab9 | 1145 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
9cc9a5cb | 1146 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
6f15cdbf SG |
1147 | OVS_NLERR(log, |
1148 | "Flow set message rejected, Key attribute missing."); | |
9cc9a5cb | 1149 | return -EINVAL; |
6f15cdbf | 1150 | } |
9cc9a5cb TZ |
1151 | |
1152 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1153 | &acts, log); | |
37bdc87b JR |
1154 | if (error) |
1155 | goto error; | |
1156 | ||
9cc9a5cb | 1157 | if (acts) { |
2fdb957d | 1158 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1159 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1160 | ufid_flags); | |
893f139b JR |
1161 | if (IS_ERR(reply)) { |
1162 | error = PTR_ERR(reply); | |
1163 | goto err_kfree_acts; | |
be52c9e9 | 1164 | } |
37bdc87b | 1165 | } |
0e9796b4 | 1166 | |
37bdc87b | 1167 | ovs_lock(); |
7f8a436e | 1168 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1169 | if (unlikely(!dp)) { |
1170 | error = -ENODEV; | |
37bdc87b | 1171 | goto err_unlock_ovs; |
893f139b | 1172 | } |
37bdc87b | 1173 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1174 | if (ufid_present) |
1175 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1176 | else | |
1177 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1178 | if (unlikely(!flow)) { |
1179 | error = -ENOENT; | |
37bdc87b | 1180 | goto err_unlock_ovs; |
893f139b | 1181 | } |
4a46b24e | 1182 | |
37bdc87b | 1183 | /* Update actions, if present. */ |
893f139b | 1184 | if (likely(acts)) { |
37bdc87b JR |
1185 | old_acts = ovsl_dereference(flow->sf_acts); |
1186 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1187 | |
1188 | if (unlikely(reply)) { | |
1189 | error = ovs_flow_cmd_fill_info(flow, | |
1190 | ovs_header->dp_ifindex, | |
1191 | reply, info->snd_portid, | |
1192 | info->snd_seq, 0, | |
804fe108 | 1193 | OVS_FLOW_CMD_SET, |
74ed7ab9 | 1194 | ufid_flags); |
893f139b JR |
1195 | BUG_ON(error < 0); |
1196 | } | |
1197 | } else { | |
1198 | /* Could not alloc without acts before locking. */ | |
1199 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
804fe108 | 1200 | info, OVS_FLOW_CMD_SET, false, |
74ed7ab9 JS |
1201 | ufid_flags); |
1202 | ||
b5ffe634 | 1203 | if (IS_ERR(reply)) { |
893f139b JR |
1204 | error = PTR_ERR(reply); |
1205 | goto err_unlock_ovs; | |
1206 | } | |
ccb1352e | 1207 | } |
37bdc87b | 1208 | |
37bdc87b JR |
1209 | /* Clear stats. */ |
1210 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1211 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1212 | ovs_unlock(); |
ccb1352e | 1213 | |
893f139b JR |
1214 | if (reply) |
1215 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1216 | if (old_acts) | |
34ae932a | 1217 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1218 | |
ccb1352e JG |
1219 | return 0; |
1220 | ||
8e4e1713 PS |
1221 | err_unlock_ovs: |
1222 | ovs_unlock(); | |
893f139b JR |
1223 | kfree_skb(reply); |
1224 | err_kfree_acts: | |
34ae932a | 1225 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1226 | error: |
1227 | return error; | |
1228 | } | |
1229 | ||
1230 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1231 | { | |
1232 | struct nlattr **a = info->attrs; | |
1233 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1234 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1235 | struct sw_flow_key key; |
1236 | struct sk_buff *reply; | |
1237 | struct sw_flow *flow; | |
1238 | struct datapath *dp; | |
03f0d916 | 1239 | struct sw_flow_match match; |
74ed7ab9 JS |
1240 | struct sw_flow_id ufid; |
1241 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1242 | int err = 0; | |
05da5898 | 1243 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1244 | bool ufid_present; |
ccb1352e | 1245 | |
74ed7ab9 JS |
1246 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1247 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1248 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 | 1249 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1250 | log); |
1251 | } else if (!ufid_present) { | |
05da5898 JR |
1252 | OVS_NLERR(log, |
1253 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1254 | err = -EINVAL; |
03f0d916 | 1255 | } |
ccb1352e JG |
1256 | if (err) |
1257 | return err; | |
1258 | ||
8e4e1713 | 1259 | ovs_lock(); |
46df7b81 | 1260 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1261 | if (!dp) { |
1262 | err = -ENODEV; | |
1263 | goto unlock; | |
1264 | } | |
ccb1352e | 1265 | |
74ed7ab9 JS |
1266 | if (ufid_present) |
1267 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1268 | else | |
1269 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1270 | if (!flow) { |
8e4e1713 PS |
1271 | err = -ENOENT; |
1272 | goto unlock; | |
1273 | } | |
ccb1352e | 1274 | |
0e9796b4 | 1275 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
804fe108 | 1276 | OVS_FLOW_CMD_GET, true, ufid_flags); |
8e4e1713 PS |
1277 | if (IS_ERR(reply)) { |
1278 | err = PTR_ERR(reply); | |
1279 | goto unlock; | |
1280 | } | |
ccb1352e | 1281 | |
8e4e1713 | 1282 | ovs_unlock(); |
ccb1352e | 1283 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1284 | unlock: |
1285 | ovs_unlock(); | |
1286 | return err; | |
ccb1352e JG |
1287 | } |
1288 | ||
1289 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1290 | { | |
1291 | struct nlattr **a = info->attrs; | |
1292 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1293 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1294 | struct sw_flow_key key; |
1295 | struct sk_buff *reply; | |
74ed7ab9 | 1296 | struct sw_flow *flow = NULL; |
ccb1352e | 1297 | struct datapath *dp; |
03f0d916 | 1298 | struct sw_flow_match match; |
74ed7ab9 JS |
1299 | struct sw_flow_id ufid; |
1300 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1301 | int err; |
05da5898 | 1302 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1303 | bool ufid_present; |
ccb1352e | 1304 | |
74ed7ab9 JS |
1305 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1306 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1307 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 JS |
1308 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1309 | NULL, log); | |
aed06778 JR |
1310 | if (unlikely(err)) |
1311 | return err; | |
1312 | } | |
1313 | ||
8e4e1713 | 1314 | ovs_lock(); |
46df7b81 | 1315 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1316 | if (unlikely(!dp)) { |
8e4e1713 PS |
1317 | err = -ENODEV; |
1318 | goto unlock; | |
1319 | } | |
46df7b81 | 1320 | |
74ed7ab9 | 1321 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1322 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1323 | goto unlock; |
1324 | } | |
03f0d916 | 1325 | |
74ed7ab9 JS |
1326 | if (ufid_present) |
1327 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1328 | else | |
1329 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1330 | if (unlikely(!flow)) { |
8e4e1713 PS |
1331 | err = -ENOENT; |
1332 | goto unlock; | |
1333 | } | |
ccb1352e | 1334 | |
b637e498 | 1335 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1336 | ovs_unlock(); |
ccb1352e | 1337 | |
aed06778 | 1338 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1339 | &flow->id, info, false, ufid_flags); |
aed06778 | 1340 | if (likely(reply)) { |
b90f5aa4 | 1341 | if (!IS_ERR(reply)) { |
aed06778 JR |
1342 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1343 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1344 | reply, info->snd_portid, | |
1345 | info->snd_seq, 0, | |
74ed7ab9 JS |
1346 | OVS_FLOW_CMD_DEL, |
1347 | ufid_flags); | |
aed06778 JR |
1348 | rcu_read_unlock(); |
1349 | BUG_ON(err < 0); | |
1350 | ||
1351 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1352 | } else { | |
1353 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1354 | } | |
fb5d1e9e | 1355 | } |
ccb1352e | 1356 | |
aed06778 | 1357 | ovs_flow_free(flow, true); |
ccb1352e | 1358 | return 0; |
8e4e1713 PS |
1359 | unlock: |
1360 | ovs_unlock(); | |
1361 | return err; | |
ccb1352e JG |
1362 | } |
1363 | ||
1364 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1365 | { | |
74ed7ab9 | 1366 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1367 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1368 | struct table_instance *ti; |
ccb1352e | 1369 | struct datapath *dp; |
74ed7ab9 JS |
1370 | u32 ufid_flags; |
1371 | int err; | |
1372 | ||
8cb08174 JB |
1373 | err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a, |
1374 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); | |
74ed7ab9 JS |
1375 | if (err) |
1376 | return err; | |
1377 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1378 | |
d57170b1 | 1379 | rcu_read_lock(); |
cc3a5ae6 | 1380 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1381 | if (!dp) { |
d57170b1 | 1382 | rcu_read_unlock(); |
ccb1352e | 1383 | return -ENODEV; |
8e4e1713 | 1384 | } |
ccb1352e | 1385 | |
b637e498 | 1386 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1387 | for (;;) { |
1388 | struct sw_flow *flow; | |
1389 | u32 bucket, obj; | |
1390 | ||
1391 | bucket = cb->args[0]; | |
1392 | obj = cb->args[1]; | |
b637e498 | 1393 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1394 | if (!flow) |
1395 | break; | |
1396 | ||
0e9796b4 | 1397 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1398 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1399 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1400 | OVS_FLOW_CMD_GET, ufid_flags) < 0) |
ccb1352e JG |
1401 | break; |
1402 | ||
1403 | cb->args[0] = bucket; | |
1404 | cb->args[1] = obj; | |
1405 | } | |
d57170b1 | 1406 | rcu_read_unlock(); |
ccb1352e JG |
1407 | return skb->len; |
1408 | } | |
1409 | ||
0c200ef9 PS |
1410 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1411 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1412 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1413 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1414 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1415 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1416 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1417 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1418 | }; |
1419 | ||
48e48a70 | 1420 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e | 1421 | { .cmd = OVS_FLOW_CMD_NEW, |
ef6243ac | 1422 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1423 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1424 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1425 | }, |
1426 | { .cmd = OVS_FLOW_CMD_DEL, | |
ef6243ac | 1427 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1428 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1429 | .doit = ovs_flow_cmd_del |
1430 | }, | |
1431 | { .cmd = OVS_FLOW_CMD_GET, | |
ef6243ac | 1432 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1433 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1434 | .doit = ovs_flow_cmd_get, |
1435 | .dumpit = ovs_flow_cmd_dump | |
1436 | }, | |
1437 | { .cmd = OVS_FLOW_CMD_SET, | |
ef6243ac | 1438 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1439 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1440 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1441 | }, |
1442 | }; | |
1443 | ||
56989f6d | 1444 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
ccb1352e | 1445 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1446 | .name = OVS_FLOW_FAMILY, |
1447 | .version = OVS_FLOW_VERSION, | |
1448 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3b0f31f2 | 1449 | .policy = flow_policy, |
3a4e0d6a PS |
1450 | .netnsok = true, |
1451 | .parallel_ops = true, | |
0c200ef9 PS |
1452 | .ops = dp_flow_genl_ops, |
1453 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1454 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1455 | .n_mcgrps = 1, | |
489111e5 | 1456 | .module = THIS_MODULE, |
ccb1352e JG |
1457 | }; |
1458 | ||
c3ff8cfe TG |
1459 | static size_t ovs_dp_cmd_msg_size(void) |
1460 | { | |
1461 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1462 | ||
1463 | msgsize += nla_total_size(IFNAMSIZ); | |
66c7a5ee ND |
1464 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1465 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
45fb9c35 | 1466 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1467 | |
1468 | return msgsize; | |
1469 | } | |
1470 | ||
8ec609d8 | 1471 | /* Called with ovs_mutex. */ |
ccb1352e | 1472 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1473 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1474 | { |
1475 | struct ovs_header *ovs_header; | |
1476 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1477 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1478 | int err; |
1479 | ||
15e47304 | 1480 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1481 | flags, cmd); |
1482 | if (!ovs_header) | |
1483 | goto error; | |
1484 | ||
1485 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1486 | ||
ccb1352e | 1487 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1488 | if (err) |
1489 | goto nla_put_failure; | |
1490 | ||
1bd7116f | 1491 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
66c7a5ee ND |
1492 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1493 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1bd7116f AZ |
1494 | goto nla_put_failure; |
1495 | ||
66c7a5ee ND |
1496 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1497 | sizeof(struct ovs_dp_megaflow_stats), | |
1498 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
028d6a67 | 1499 | goto nla_put_failure; |
ccb1352e | 1500 | |
43d4be9c TG |
1501 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1502 | goto nla_put_failure; | |
1503 | ||
053c095a JB |
1504 | genlmsg_end(skb, ovs_header); |
1505 | return 0; | |
ccb1352e JG |
1506 | |
1507 | nla_put_failure: | |
1508 | genlmsg_cancel(skb, ovs_header); | |
1509 | error: | |
1510 | return -EMSGSIZE; | |
1511 | } | |
1512 | ||
263ea090 | 1513 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
ccb1352e | 1514 | { |
551ddc05 | 1515 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1516 | } |
1517 | ||
bb6f9a70 | 1518 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1519 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1520 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1521 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1522 | { | |
1523 | struct datapath *dp; | |
1524 | ||
1525 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1526 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1527 | else { |
1528 | struct vport *vport; | |
1529 | ||
46df7b81 | 1530 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1531 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1532 | } |
1533 | return dp ? dp : ERR_PTR(-ENODEV); | |
1534 | } | |
1535 | ||
44da5ae5 TG |
1536 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1537 | { | |
1538 | struct datapath *dp; | |
1539 | ||
1540 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1541 | if (IS_ERR(dp)) |
44da5ae5 TG |
1542 | return; |
1543 | ||
1544 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1545 | dp->user_features = 0; | |
1546 | } | |
1547 | ||
95a7233c PB |
1548 | DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support); |
1549 | ||
1550 | static int ovs_dp_change(struct datapath *dp, struct nlattr *a[]) | |
43d4be9c | 1551 | { |
95a7233c PB |
1552 | u32 user_features = 0; |
1553 | ||
1554 | if (a[OVS_DP_ATTR_USER_FEATURES]) { | |
1555 | user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1556 | ||
1557 | if (user_features & ~(OVS_DP_F_VPORT_PIDS | | |
1558 | OVS_DP_F_UNALIGNED | | |
1559 | OVS_DP_F_TC_RECIRC_SHARING)) | |
1560 | return -EOPNOTSUPP; | |
1561 | ||
1562 | #if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT) | |
1563 | if (user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1564 | return -EOPNOTSUPP; | |
1565 | #endif | |
1566 | } | |
1567 | ||
1568 | dp->user_features = user_features; | |
1569 | ||
1570 | if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1571 | static_branch_enable(&tc_recirc_sharing_support); | |
1572 | else | |
1573 | static_branch_disable(&tc_recirc_sharing_support); | |
1574 | ||
1575 | return 0; | |
43d4be9c TG |
1576 | } |
1577 | ||
ccb1352e JG |
1578 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1579 | { | |
1580 | struct nlattr **a = info->attrs; | |
1581 | struct vport_parms parms; | |
1582 | struct sk_buff *reply; | |
1583 | struct datapath *dp; | |
1584 | struct vport *vport; | |
46df7b81 | 1585 | struct ovs_net *ovs_net; |
15eac2a7 | 1586 | int err, i; |
ccb1352e JG |
1587 | |
1588 | err = -EINVAL; | |
1589 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1590 | goto err; | |
1591 | ||
263ea090 | 1592 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1593 | if (!reply) |
1594 | return -ENOMEM; | |
ccb1352e JG |
1595 | |
1596 | err = -ENOMEM; | |
1597 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1598 | if (dp == NULL) | |
6093ae9a | 1599 | goto err_free_reply; |
46df7b81 | 1600 | |
efd7ef1c | 1601 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1602 | |
1603 | /* Allocate table. */ | |
b637e498 PS |
1604 | err = ovs_flow_tbl_init(&dp->table); |
1605 | if (err) | |
ccb1352e JG |
1606 | goto err_free_dp; |
1607 | ||
1c213bd2 | 1608 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1609 | if (!dp->stats_percpu) { |
1610 | err = -ENOMEM; | |
1611 | goto err_destroy_table; | |
1612 | } | |
1613 | ||
6da2ec56 KC |
1614 | dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, |
1615 | sizeof(struct hlist_head), | |
1616 | GFP_KERNEL); | |
15eac2a7 PS |
1617 | if (!dp->ports) { |
1618 | err = -ENOMEM; | |
1619 | goto err_destroy_percpu; | |
1620 | } | |
1621 | ||
1622 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1623 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1624 | ||
96fbc13d AZ |
1625 | err = ovs_meters_init(dp); |
1626 | if (err) | |
1627 | goto err_destroy_ports_array; | |
1628 | ||
ccb1352e JG |
1629 | /* Set up our datapath device. */ |
1630 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1631 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1632 | parms.options = NULL; | |
1633 | parms.dp = dp; | |
1634 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1635 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1636 | |
95a7233c PB |
1637 | err = ovs_dp_change(dp, a); |
1638 | if (err) | |
1639 | goto err_destroy_meters; | |
43d4be9c | 1640 | |
6093ae9a JR |
1641 | /* So far only local changes have been made, now need the lock. */ |
1642 | ovs_lock(); | |
1643 | ||
ccb1352e JG |
1644 | vport = new_vport(&parms); |
1645 | if (IS_ERR(vport)) { | |
1646 | err = PTR_ERR(vport); | |
1647 | if (err == -EBUSY) | |
1648 | err = -EEXIST; | |
1649 | ||
44da5ae5 TG |
1650 | if (err == -EEXIST) { |
1651 | /* An outdated user space instance that does not understand | |
1652 | * the concept of user_features has attempted to create a new | |
1653 | * datapath and is likely to reuse it. Drop all user features. | |
1654 | */ | |
1655 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1656 | ovs_dp_reset_user_features(skb, info); | |
1657 | } | |
1658 | ||
96fbc13d | 1659 | goto err_destroy_meters; |
ccb1352e JG |
1660 | } |
1661 | ||
6093ae9a JR |
1662 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1663 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1664 | BUG_ON(err < 0); | |
ccb1352e | 1665 | |
46df7b81 | 1666 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1667 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1668 | |
1669 | ovs_unlock(); | |
ccb1352e | 1670 | |
2a94fe48 | 1671 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1672 | return 0; |
1673 | ||
96fbc13d | 1674 | err_destroy_meters: |
6093ae9a | 1675 | ovs_unlock(); |
96fbc13d AZ |
1676 | ovs_meters_exit(dp); |
1677 | err_destroy_ports_array: | |
15eac2a7 | 1678 | kfree(dp->ports); |
ccb1352e JG |
1679 | err_destroy_percpu: |
1680 | free_percpu(dp->stats_percpu); | |
1681 | err_destroy_table: | |
9b996e54 | 1682 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e JG |
1683 | err_free_dp: |
1684 | kfree(dp); | |
6093ae9a JR |
1685 | err_free_reply: |
1686 | kfree_skb(reply); | |
ccb1352e JG |
1687 | err: |
1688 | return err; | |
1689 | } | |
1690 | ||
8e4e1713 | 1691 | /* Called with ovs_mutex. */ |
46df7b81 | 1692 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1693 | { |
15eac2a7 | 1694 | int i; |
ccb1352e | 1695 | |
15eac2a7 PS |
1696 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1697 | struct vport *vport; | |
b67bfe0d | 1698 | struct hlist_node *n; |
15eac2a7 | 1699 | |
b67bfe0d | 1700 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1701 | if (vport->port_no != OVSP_LOCAL) |
1702 | ovs_dp_detach_port(vport); | |
1703 | } | |
ccb1352e | 1704 | |
59a35d60 | 1705 | list_del_rcu(&dp->list_node); |
ccb1352e | 1706 | |
8e4e1713 | 1707 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1708 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1709 | */ |
8e4e1713 | 1710 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1711 | |
e80857cc | 1712 | /* RCU destroy the flow table */ |
ccb1352e | 1713 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1714 | } |
1715 | ||
1716 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1717 | { | |
1718 | struct sk_buff *reply; | |
1719 | struct datapath *dp; | |
1720 | int err; | |
1721 | ||
263ea090 | 1722 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1723 | if (!reply) |
1724 | return -ENOMEM; | |
1725 | ||
8e4e1713 | 1726 | ovs_lock(); |
46df7b81 PS |
1727 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1728 | err = PTR_ERR(dp); | |
1729 | if (IS_ERR(dp)) | |
6093ae9a | 1730 | goto err_unlock_free; |
46df7b81 | 1731 | |
6093ae9a JR |
1732 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1733 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1734 | BUG_ON(err < 0); | |
46df7b81 PS |
1735 | |
1736 | __dp_destroy(dp); | |
8e4e1713 | 1737 | ovs_unlock(); |
ccb1352e | 1738 | |
2a94fe48 | 1739 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1740 | |
1741 | return 0; | |
6093ae9a JR |
1742 | |
1743 | err_unlock_free: | |
8e4e1713 | 1744 | ovs_unlock(); |
6093ae9a | 1745 | kfree_skb(reply); |
8e4e1713 | 1746 | return err; |
ccb1352e JG |
1747 | } |
1748 | ||
1749 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1750 | { | |
1751 | struct sk_buff *reply; | |
1752 | struct datapath *dp; | |
1753 | int err; | |
1754 | ||
263ea090 | 1755 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1756 | if (!reply) |
1757 | return -ENOMEM; | |
1758 | ||
8e4e1713 | 1759 | ovs_lock(); |
46df7b81 | 1760 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1761 | err = PTR_ERR(dp); |
ccb1352e | 1762 | if (IS_ERR(dp)) |
6093ae9a | 1763 | goto err_unlock_free; |
ccb1352e | 1764 | |
95a7233c PB |
1765 | err = ovs_dp_change(dp, info->attrs); |
1766 | if (err) | |
1767 | goto err_unlock_free; | |
43d4be9c | 1768 | |
6093ae9a | 1769 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1770 | info->snd_seq, 0, OVS_DP_CMD_SET); |
6093ae9a | 1771 | BUG_ON(err < 0); |
ccb1352e | 1772 | |
8e4e1713 | 1773 | ovs_unlock(); |
2a94fe48 | 1774 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1775 | |
1776 | return 0; | |
6093ae9a JR |
1777 | |
1778 | err_unlock_free: | |
8e4e1713 | 1779 | ovs_unlock(); |
6093ae9a | 1780 | kfree_skb(reply); |
8e4e1713 | 1781 | return err; |
ccb1352e JG |
1782 | } |
1783 | ||
1784 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1785 | { | |
1786 | struct sk_buff *reply; | |
1787 | struct datapath *dp; | |
8e4e1713 | 1788 | int err; |
ccb1352e | 1789 | |
263ea090 | 1790 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1791 | if (!reply) |
1792 | return -ENOMEM; | |
1793 | ||
8ec609d8 | 1794 | ovs_lock(); |
46df7b81 | 1795 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1796 | if (IS_ERR(dp)) { |
1797 | err = PTR_ERR(dp); | |
6093ae9a | 1798 | goto err_unlock_free; |
8e4e1713 | 1799 | } |
6093ae9a | 1800 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1801 | info->snd_seq, 0, OVS_DP_CMD_GET); |
6093ae9a | 1802 | BUG_ON(err < 0); |
8ec609d8 | 1803 | ovs_unlock(); |
ccb1352e JG |
1804 | |
1805 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1806 | |
6093ae9a | 1807 | err_unlock_free: |
8ec609d8 | 1808 | ovs_unlock(); |
6093ae9a | 1809 | kfree_skb(reply); |
8e4e1713 | 1810 | return err; |
ccb1352e JG |
1811 | } |
1812 | ||
1813 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1814 | { | |
46df7b81 | 1815 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1816 | struct datapath *dp; |
1817 | int skip = cb->args[0]; | |
1818 | int i = 0; | |
1819 | ||
8ec609d8 PS |
1820 | ovs_lock(); |
1821 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1822 | if (i >= skip && |
15e47304 | 1823 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e | 1824 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1825 | OVS_DP_CMD_GET) < 0) |
ccb1352e JG |
1826 | break; |
1827 | i++; | |
1828 | } | |
8ec609d8 | 1829 | ovs_unlock(); |
ccb1352e JG |
1830 | |
1831 | cb->args[0] = i; | |
1832 | ||
1833 | return skb->len; | |
1834 | } | |
1835 | ||
0c200ef9 PS |
1836 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1837 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1838 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1839 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1840 | }; | |
1841 | ||
48e48a70 | 1842 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e | 1843 | { .cmd = OVS_DP_CMD_NEW, |
ef6243ac | 1844 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1845 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1846 | .doit = ovs_dp_cmd_new |
1847 | }, | |
1848 | { .cmd = OVS_DP_CMD_DEL, | |
ef6243ac | 1849 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1850 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1851 | .doit = ovs_dp_cmd_del |
1852 | }, | |
1853 | { .cmd = OVS_DP_CMD_GET, | |
ef6243ac | 1854 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1855 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1856 | .doit = ovs_dp_cmd_get, |
1857 | .dumpit = ovs_dp_cmd_dump | |
1858 | }, | |
1859 | { .cmd = OVS_DP_CMD_SET, | |
ef6243ac | 1860 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1861 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1862 | .doit = ovs_dp_cmd_set, |
1863 | }, | |
1864 | }; | |
1865 | ||
56989f6d | 1866 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
ccb1352e | 1867 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1868 | .name = OVS_DATAPATH_FAMILY, |
1869 | .version = OVS_DATAPATH_VERSION, | |
1870 | .maxattr = OVS_DP_ATTR_MAX, | |
3b0f31f2 | 1871 | .policy = datapath_policy, |
3a4e0d6a PS |
1872 | .netnsok = true, |
1873 | .parallel_ops = true, | |
0c200ef9 PS |
1874 | .ops = dp_datapath_genl_ops, |
1875 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1876 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1877 | .n_mcgrps = 1, | |
489111e5 | 1878 | .module = THIS_MODULE, |
ccb1352e JG |
1879 | }; |
1880 | ||
8e4e1713 | 1881 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1882 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
9354d452 JB |
1883 | struct net *net, u32 portid, u32 seq, |
1884 | u32 flags, u8 cmd) | |
ccb1352e JG |
1885 | { |
1886 | struct ovs_header *ovs_header; | |
1887 | struct ovs_vport_stats vport_stats; | |
1888 | int err; | |
1889 | ||
15e47304 | 1890 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1891 | flags, cmd); |
1892 | if (!ovs_header) | |
1893 | return -EMSGSIZE; | |
1894 | ||
1895 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1896 | ||
028d6a67 DM |
1897 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1898 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 1899 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
9354d452 JB |
1900 | ovs_vport_name(vport)) || |
1901 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
028d6a67 | 1902 | goto nla_put_failure; |
ccb1352e | 1903 | |
9354d452 JB |
1904 | if (!net_eq(net, dev_net(vport->dev))) { |
1905 | int id = peernet2id_alloc(net, dev_net(vport->dev)); | |
1906 | ||
1907 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
1908 | goto nla_put_failure; | |
1909 | } | |
1910 | ||
ccb1352e | 1911 | ovs_vport_get_stats(vport, &vport_stats); |
66c7a5ee ND |
1912 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1913 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1914 | OVS_VPORT_ATTR_PAD)) | |
028d6a67 | 1915 | goto nla_put_failure; |
ccb1352e | 1916 | |
5cd667b0 AW |
1917 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1918 | goto nla_put_failure; | |
1919 | ||
ccb1352e JG |
1920 | err = ovs_vport_get_options(vport, skb); |
1921 | if (err == -EMSGSIZE) | |
1922 | goto error; | |
1923 | ||
053c095a JB |
1924 | genlmsg_end(skb, ovs_header); |
1925 | return 0; | |
ccb1352e JG |
1926 | |
1927 | nla_put_failure: | |
1928 | err = -EMSGSIZE; | |
1929 | error: | |
1930 | genlmsg_cancel(skb, ovs_header); | |
1931 | return err; | |
1932 | } | |
1933 | ||
6093ae9a JR |
1934 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1935 | { | |
1936 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1937 | } | |
1938 | ||
1939 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
9354d452 JB |
1940 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, |
1941 | u32 portid, u32 seq, u8 cmd) | |
ccb1352e JG |
1942 | { |
1943 | struct sk_buff *skb; | |
1944 | int retval; | |
1945 | ||
1946 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1947 | if (!skb) | |
1948 | return ERR_PTR(-ENOMEM); | |
1949 | ||
9354d452 | 1950 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd); |
a9341512 JG |
1951 | BUG_ON(retval < 0); |
1952 | ||
ccb1352e JG |
1953 | return skb; |
1954 | } | |
1955 | ||
8e4e1713 | 1956 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 1957 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 1958 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1959 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1960 | { | |
1961 | struct datapath *dp; | |
1962 | struct vport *vport; | |
1963 | ||
9354d452 JB |
1964 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
1965 | return ERR_PTR(-EOPNOTSUPP); | |
ccb1352e | 1966 | if (a[OVS_VPORT_ATTR_NAME]) { |
46df7b81 | 1967 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1968 | if (!vport) |
1969 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1970 | if (ovs_header->dp_ifindex && |
1971 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1972 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1973 | return vport; |
1974 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1975 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1976 | ||
1977 | if (port_no >= DP_MAX_PORTS) | |
1978 | return ERR_PTR(-EFBIG); | |
1979 | ||
46df7b81 | 1980 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1981 | if (!dp) |
1982 | return ERR_PTR(-ENODEV); | |
1983 | ||
8e4e1713 | 1984 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1985 | if (!vport) |
14408dba | 1986 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1987 | return vport; |
1988 | } else | |
1989 | return ERR_PTR(-EINVAL); | |
9354d452 | 1990 | |
ccb1352e JG |
1991 | } |
1992 | ||
6b660c41 | 1993 | static unsigned int ovs_get_max_headroom(struct datapath *dp) |
3a927bc7 | 1994 | { |
6b660c41 | 1995 | unsigned int dev_headroom, max_headroom = 0; |
3a927bc7 PA |
1996 | struct net_device *dev; |
1997 | struct vport *vport; | |
1998 | int i; | |
1999 | ||
2000 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2001 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
2002 | dev = vport->dev; | |
2003 | dev_headroom = netdev_get_fwd_headroom(dev); | |
2004 | if (dev_headroom > max_headroom) | |
2005 | max_headroom = dev_headroom; | |
2006 | } | |
2007 | } | |
2008 | ||
6b660c41 TY |
2009 | return max_headroom; |
2010 | } | |
2011 | ||
2012 | /* Called with ovs_mutex */ | |
2013 | static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom) | |
2014 | { | |
2015 | struct vport *vport; | |
2016 | int i; | |
2017 | ||
2018 | dp->max_headroom = new_headroom; | |
3a927bc7 PA |
2019 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) |
2020 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) | |
6b660c41 | 2021 | netdev_set_rx_headroom(vport->dev, new_headroom); |
3a927bc7 PA |
2022 | } |
2023 | ||
ccb1352e JG |
2024 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
2025 | { | |
2026 | struct nlattr **a = info->attrs; | |
2027 | struct ovs_header *ovs_header = info->userhdr; | |
2028 | struct vport_parms parms; | |
2029 | struct sk_buff *reply; | |
2030 | struct vport *vport; | |
2031 | struct datapath *dp; | |
6b660c41 | 2032 | unsigned int new_headroom; |
ccb1352e JG |
2033 | u32 port_no; |
2034 | int err; | |
2035 | ||
ccb1352e JG |
2036 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
2037 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a | 2038 | return -EINVAL; |
9354d452 JB |
2039 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2040 | return -EOPNOTSUPP; | |
6093ae9a JR |
2041 | |
2042 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2043 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2044 | if (port_no >= DP_MAX_PORTS) | |
2045 | return -EFBIG; | |
2046 | ||
2047 | reply = ovs_vport_cmd_alloc_info(); | |
2048 | if (!reply) | |
2049 | return -ENOMEM; | |
ccb1352e | 2050 | |
8e4e1713 | 2051 | ovs_lock(); |
62b9c8d0 | 2052 | restart: |
46df7b81 | 2053 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
2054 | err = -ENODEV; |
2055 | if (!dp) | |
6093ae9a | 2056 | goto exit_unlock_free; |
ccb1352e | 2057 | |
6093ae9a | 2058 | if (port_no) { |
8e4e1713 | 2059 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2060 | err = -EBUSY; |
2061 | if (vport) | |
6093ae9a | 2062 | goto exit_unlock_free; |
ccb1352e JG |
2063 | } else { |
2064 | for (port_no = 1; ; port_no++) { | |
2065 | if (port_no >= DP_MAX_PORTS) { | |
2066 | err = -EFBIG; | |
6093ae9a | 2067 | goto exit_unlock_free; |
ccb1352e | 2068 | } |
8e4e1713 | 2069 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2070 | if (!vport) |
2071 | break; | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2076 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2077 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2078 | parms.dp = dp; | |
2079 | parms.port_no = port_no; | |
5cd667b0 | 2080 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
2081 | |
2082 | vport = new_vport(&parms); | |
2083 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
2084 | if (IS_ERR(vport)) { |
2085 | if (err == -EAGAIN) | |
2086 | goto restart; | |
6093ae9a | 2087 | goto exit_unlock_free; |
62b9c8d0 | 2088 | } |
ccb1352e | 2089 | |
9354d452 JB |
2090 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2091 | info->snd_portid, info->snd_seq, 0, | |
2092 | OVS_VPORT_CMD_NEW); | |
3a927bc7 | 2093 | |
6b660c41 TY |
2094 | new_headroom = netdev_get_fwd_headroom(vport->dev); |
2095 | ||
2096 | if (new_headroom > dp->max_headroom) | |
2097 | ovs_update_headroom(dp, new_headroom); | |
3a927bc7 PA |
2098 | else |
2099 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2100 | ||
6093ae9a JR |
2101 | BUG_ON(err < 0); |
2102 | ovs_unlock(); | |
ed661185 | 2103 | |
2a94fe48 | 2104 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2105 | return 0; |
ccb1352e | 2106 | |
6093ae9a | 2107 | exit_unlock_free: |
8e4e1713 | 2108 | ovs_unlock(); |
6093ae9a | 2109 | kfree_skb(reply); |
ccb1352e JG |
2110 | return err; |
2111 | } | |
2112 | ||
2113 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2114 | { | |
2115 | struct nlattr **a = info->attrs; | |
2116 | struct sk_buff *reply; | |
2117 | struct vport *vport; | |
2118 | int err; | |
2119 | ||
6093ae9a JR |
2120 | reply = ovs_vport_cmd_alloc_info(); |
2121 | if (!reply) | |
2122 | return -ENOMEM; | |
2123 | ||
8e4e1713 | 2124 | ovs_lock(); |
46df7b81 | 2125 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2126 | err = PTR_ERR(vport); |
2127 | if (IS_ERR(vport)) | |
6093ae9a | 2128 | goto exit_unlock_free; |
ccb1352e | 2129 | |
ccb1352e | 2130 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2131 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2132 | err = -EINVAL; |
6093ae9a | 2133 | goto exit_unlock_free; |
a9341512 JG |
2134 | } |
2135 | ||
f44f3408 | 2136 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2137 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2138 | if (err) |
6093ae9a | 2139 | goto exit_unlock_free; |
f44f3408 | 2140 | } |
a9341512 | 2141 | |
5cd667b0 AW |
2142 | |
2143 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2144 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2145 | ||
2146 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2147 | if (err) | |
2148 | goto exit_unlock_free; | |
2149 | } | |
ccb1352e | 2150 | |
9354d452 JB |
2151 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2152 | info->snd_portid, info->snd_seq, 0, | |
804fe108 | 2153 | OVS_VPORT_CMD_SET); |
a9341512 | 2154 | BUG_ON(err < 0); |
ccb1352e | 2155 | |
8e4e1713 | 2156 | ovs_unlock(); |
2a94fe48 | 2157 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2158 | return 0; |
ccb1352e | 2159 | |
6093ae9a | 2160 | exit_unlock_free: |
8e4e1713 | 2161 | ovs_unlock(); |
6093ae9a | 2162 | kfree_skb(reply); |
ccb1352e JG |
2163 | return err; |
2164 | } | |
2165 | ||
2166 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2167 | { | |
6b660c41 | 2168 | bool update_headroom = false; |
ccb1352e JG |
2169 | struct nlattr **a = info->attrs; |
2170 | struct sk_buff *reply; | |
3a927bc7 | 2171 | struct datapath *dp; |
ccb1352e | 2172 | struct vport *vport; |
6b660c41 | 2173 | unsigned int new_headroom; |
ccb1352e JG |
2174 | int err; |
2175 | ||
6093ae9a JR |
2176 | reply = ovs_vport_cmd_alloc_info(); |
2177 | if (!reply) | |
2178 | return -ENOMEM; | |
2179 | ||
8e4e1713 | 2180 | ovs_lock(); |
46df7b81 | 2181 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2182 | err = PTR_ERR(vport); |
2183 | if (IS_ERR(vport)) | |
6093ae9a | 2184 | goto exit_unlock_free; |
ccb1352e JG |
2185 | |
2186 | if (vport->port_no == OVSP_LOCAL) { | |
2187 | err = -EINVAL; | |
6093ae9a | 2188 | goto exit_unlock_free; |
ccb1352e JG |
2189 | } |
2190 | ||
9354d452 JB |
2191 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2192 | info->snd_portid, info->snd_seq, 0, | |
2193 | OVS_VPORT_CMD_DEL); | |
6093ae9a | 2194 | BUG_ON(err < 0); |
3a927bc7 PA |
2195 | |
2196 | /* the vport deletion may trigger dp headroom update */ | |
2197 | dp = vport->dp; | |
2198 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
6b660c41 TY |
2199 | update_headroom = true; |
2200 | ||
3a927bc7 | 2201 | netdev_reset_rx_headroom(vport->dev); |
ccb1352e | 2202 | ovs_dp_detach_port(vport); |
3a927bc7 | 2203 | |
6b660c41 TY |
2204 | if (update_headroom) { |
2205 | new_headroom = ovs_get_max_headroom(dp); | |
2206 | ||
2207 | if (new_headroom < dp->max_headroom) | |
2208 | ovs_update_headroom(dp, new_headroom); | |
2209 | } | |
6093ae9a | 2210 | ovs_unlock(); |
ccb1352e | 2211 | |
2a94fe48 | 2212 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2213 | return 0; |
ccb1352e | 2214 | |
6093ae9a | 2215 | exit_unlock_free: |
8e4e1713 | 2216 | ovs_unlock(); |
6093ae9a | 2217 | kfree_skb(reply); |
ccb1352e JG |
2218 | return err; |
2219 | } | |
2220 | ||
2221 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2222 | { | |
2223 | struct nlattr **a = info->attrs; | |
2224 | struct ovs_header *ovs_header = info->userhdr; | |
2225 | struct sk_buff *reply; | |
2226 | struct vport *vport; | |
2227 | int err; | |
2228 | ||
6093ae9a JR |
2229 | reply = ovs_vport_cmd_alloc_info(); |
2230 | if (!reply) | |
2231 | return -ENOMEM; | |
2232 | ||
ccb1352e | 2233 | rcu_read_lock(); |
46df7b81 | 2234 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2235 | err = PTR_ERR(vport); |
2236 | if (IS_ERR(vport)) | |
6093ae9a | 2237 | goto exit_unlock_free; |
9354d452 JB |
2238 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2239 | info->snd_portid, info->snd_seq, 0, | |
804fe108 | 2240 | OVS_VPORT_CMD_GET); |
6093ae9a | 2241 | BUG_ON(err < 0); |
ccb1352e JG |
2242 | rcu_read_unlock(); |
2243 | ||
2244 | return genlmsg_reply(reply, info); | |
2245 | ||
6093ae9a | 2246 | exit_unlock_free: |
ccb1352e | 2247 | rcu_read_unlock(); |
6093ae9a | 2248 | kfree_skb(reply); |
ccb1352e JG |
2249 | return err; |
2250 | } | |
2251 | ||
2252 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2253 | { | |
2254 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2255 | struct datapath *dp; | |
15eac2a7 PS |
2256 | int bucket = cb->args[0], skip = cb->args[1]; |
2257 | int i, j = 0; | |
ccb1352e | 2258 | |
42ee19e2 | 2259 | rcu_read_lock(); |
cc3a5ae6 | 2260 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2261 | if (!dp) { |
2262 | rcu_read_unlock(); | |
ccb1352e | 2263 | return -ENODEV; |
42ee19e2 | 2264 | } |
15eac2a7 | 2265 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2266 | struct vport *vport; |
15eac2a7 PS |
2267 | |
2268 | j = 0; | |
b67bfe0d | 2269 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2270 | if (j >= skip && |
2271 | ovs_vport_cmd_fill_info(vport, skb, | |
9354d452 | 2272 | sock_net(skb->sk), |
15e47304 | 2273 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2274 | cb->nlh->nlmsg_seq, |
2275 | NLM_F_MULTI, | |
804fe108 | 2276 | OVS_VPORT_CMD_GET) < 0) |
15eac2a7 PS |
2277 | goto out; |
2278 | ||
2279 | j++; | |
2280 | } | |
2281 | skip = 0; | |
ccb1352e | 2282 | } |
15eac2a7 | 2283 | out: |
ccb1352e JG |
2284 | rcu_read_unlock(); |
2285 | ||
15eac2a7 PS |
2286 | cb->args[0] = i; |
2287 | cb->args[1] = j; | |
ccb1352e | 2288 | |
15eac2a7 | 2289 | return skb->len; |
ccb1352e JG |
2290 | } |
2291 | ||
0c200ef9 PS |
2292 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2293 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2294 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2295 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2296 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2297 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2298 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
9354d452 JB |
2299 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, |
2300 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
0c200ef9 PS |
2301 | }; |
2302 | ||
48e48a70 | 2303 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e | 2304 | { .cmd = OVS_VPORT_CMD_NEW, |
ef6243ac | 2305 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2306 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2307 | .doit = ovs_vport_cmd_new |
2308 | }, | |
2309 | { .cmd = OVS_VPORT_CMD_DEL, | |
ef6243ac | 2310 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2311 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2312 | .doit = ovs_vport_cmd_del |
2313 | }, | |
2314 | { .cmd = OVS_VPORT_CMD_GET, | |
ef6243ac | 2315 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 2316 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
2317 | .doit = ovs_vport_cmd_get, |
2318 | .dumpit = ovs_vport_cmd_dump | |
2319 | }, | |
2320 | { .cmd = OVS_VPORT_CMD_SET, | |
ef6243ac | 2321 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2322 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2323 | .doit = ovs_vport_cmd_set, |
2324 | }, | |
2325 | }; | |
2326 | ||
56989f6d | 2327 | struct genl_family dp_vport_genl_family __ro_after_init = { |
0c200ef9 PS |
2328 | .hdrsize = sizeof(struct ovs_header), |
2329 | .name = OVS_VPORT_FAMILY, | |
2330 | .version = OVS_VPORT_VERSION, | |
2331 | .maxattr = OVS_VPORT_ATTR_MAX, | |
3b0f31f2 | 2332 | .policy = vport_policy, |
0c200ef9 PS |
2333 | .netnsok = true, |
2334 | .parallel_ops = true, | |
2335 | .ops = dp_vport_genl_ops, | |
2336 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2337 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2338 | .n_mcgrps = 1, | |
489111e5 | 2339 | .module = THIS_MODULE, |
ccb1352e JG |
2340 | }; |
2341 | ||
0c200ef9 PS |
2342 | static struct genl_family * const dp_genl_families[] = { |
2343 | &dp_datapath_genl_family, | |
2344 | &dp_vport_genl_family, | |
2345 | &dp_flow_genl_family, | |
2346 | &dp_packet_genl_family, | |
96fbc13d | 2347 | &dp_meter_genl_family, |
11efd5cb YHW |
2348 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
2349 | &dp_ct_limit_genl_family, | |
2350 | #endif | |
ccb1352e JG |
2351 | }; |
2352 | ||
2353 | static void dp_unregister_genl(int n_families) | |
2354 | { | |
2355 | int i; | |
2356 | ||
2357 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2358 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2359 | } |
2360 | ||
56989f6d | 2361 | static int __init dp_register_genl(void) |
ccb1352e | 2362 | { |
ccb1352e JG |
2363 | int err; |
2364 | int i; | |
2365 | ||
ccb1352e | 2366 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2367 | |
0c200ef9 | 2368 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2369 | if (err) |
2370 | goto error; | |
ccb1352e JG |
2371 | } |
2372 | ||
2373 | return 0; | |
2374 | ||
2375 | error: | |
0c200ef9 | 2376 | dp_unregister_genl(i); |
ccb1352e JG |
2377 | return err; |
2378 | } | |
2379 | ||
46df7b81 PS |
2380 | static int __net_init ovs_init_net(struct net *net) |
2381 | { | |
2382 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2383 | ||
2384 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2385 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
11efd5cb | 2386 | return ovs_ct_init(net); |
46df7b81 PS |
2387 | } |
2388 | ||
7b4577a9 PS |
2389 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2390 | struct list_head *head) | |
46df7b81 | 2391 | { |
8e4e1713 | 2392 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2393 | struct datapath *dp; |
2394 | ||
2395 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2396 | int i; | |
2397 | ||
2398 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2399 | struct vport *vport; | |
2400 | ||
2401 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2402 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2403 | continue; | |
2404 | ||
be4ace6e | 2405 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2406 | list_add(&vport->detach_list, head); |
2407 | } | |
2408 | } | |
2409 | } | |
2410 | } | |
2411 | ||
2412 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2413 | { | |
2414 | struct datapath *dp, *dp_next; | |
2415 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2416 | struct vport *vport, *vport_next; | |
2417 | struct net *net; | |
2418 | LIST_HEAD(head); | |
46df7b81 | 2419 | |
c2ac6673 | 2420 | ovs_ct_exit(dnet); |
8e4e1713 | 2421 | ovs_lock(); |
46df7b81 PS |
2422 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2423 | __dp_destroy(dp); | |
7b4577a9 | 2424 | |
f0b07bb1 | 2425 | down_read(&net_rwsem); |
7b4577a9 PS |
2426 | for_each_net(net) |
2427 | list_vports_from_net(net, dnet, &head); | |
f0b07bb1 | 2428 | up_read(&net_rwsem); |
7b4577a9 PS |
2429 | |
2430 | /* Detach all vports from given namespace. */ | |
2431 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2432 | list_del(&vport->detach_list); | |
2433 | ovs_dp_detach_port(vport); | |
2434 | } | |
2435 | ||
8e4e1713 PS |
2436 | ovs_unlock(); |
2437 | ||
2438 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2439 | } |
2440 | ||
2441 | static struct pernet_operations ovs_net_ops = { | |
2442 | .init = ovs_init_net, | |
2443 | .exit = ovs_exit_net, | |
2444 | .id = &ovs_net_id, | |
2445 | .size = sizeof(struct ovs_net), | |
2446 | }; | |
2447 | ||
ccb1352e JG |
2448 | static int __init dp_init(void) |
2449 | { | |
ccb1352e JG |
2450 | int err; |
2451 | ||
3523b29b | 2452 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2453 | |
2454 | pr_info("Open vSwitch switching datapath\n"); | |
2455 | ||
971427f3 | 2456 | err = action_fifos_init(); |
ccb1352e JG |
2457 | if (err) |
2458 | goto error; | |
2459 | ||
971427f3 AZ |
2460 | err = ovs_internal_dev_rtnl_link_register(); |
2461 | if (err) | |
2462 | goto error_action_fifos_exit; | |
2463 | ||
5b9e7e16 JP |
2464 | err = ovs_flow_init(); |
2465 | if (err) | |
2466 | goto error_unreg_rtnl_link; | |
2467 | ||
ccb1352e JG |
2468 | err = ovs_vport_init(); |
2469 | if (err) | |
2470 | goto error_flow_exit; | |
2471 | ||
46df7b81 | 2472 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2473 | if (err) |
2474 | goto error_vport_exit; | |
2475 | ||
46df7b81 PS |
2476 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2477 | if (err) | |
2478 | goto error_netns_exit; | |
2479 | ||
62b9c8d0 TG |
2480 | err = ovs_netdev_init(); |
2481 | if (err) | |
2482 | goto error_unreg_notifier; | |
2483 | ||
ccb1352e JG |
2484 | err = dp_register_genl(); |
2485 | if (err < 0) | |
62b9c8d0 | 2486 | goto error_unreg_netdev; |
ccb1352e | 2487 | |
ccb1352e JG |
2488 | return 0; |
2489 | ||
62b9c8d0 TG |
2490 | error_unreg_netdev: |
2491 | ovs_netdev_exit(); | |
ccb1352e JG |
2492 | error_unreg_notifier: |
2493 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2494 | error_netns_exit: |
2495 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2496 | error_vport_exit: |
2497 | ovs_vport_exit(); | |
2498 | error_flow_exit: | |
2499 | ovs_flow_exit(); | |
5b9e7e16 JP |
2500 | error_unreg_rtnl_link: |
2501 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2502 | error_action_fifos_exit: |
2503 | action_fifos_exit(); | |
ccb1352e JG |
2504 | error: |
2505 | return err; | |
2506 | } | |
2507 | ||
2508 | static void dp_cleanup(void) | |
2509 | { | |
ccb1352e | 2510 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2511 | ovs_netdev_exit(); |
ccb1352e | 2512 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2513 | unregister_pernet_device(&ovs_net_ops); |
2514 | rcu_barrier(); | |
ccb1352e JG |
2515 | ovs_vport_exit(); |
2516 | ovs_flow_exit(); | |
5b9e7e16 | 2517 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2518 | action_fifos_exit(); |
ccb1352e JG |
2519 | } |
2520 | ||
2521 | module_init(dp_init); | |
2522 | module_exit(dp_cleanup); | |
2523 | ||
2524 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2525 | MODULE_LICENSE("GPL"); | |
ed227099 TLSC |
2526 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2527 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2528 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2529 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
96fbc13d | 2530 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); |
11efd5cb | 2531 | MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); |