1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * net/sched/cls_flower.c Flower classifier
4 *
5 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
6 */
7
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/module.h>
11 #include <linux/rhashtable.h>
12 #include <linux/workqueue.h>
13 #include <linux/refcount.h>
14
15 #include <linux/if_ether.h>
16 #include <linux/in6.h>
17 #include <linux/ip.h>
18 #include <linux/mpls.h>
19
20 #include <net/sch_generic.h>
21 #include <net/pkt_cls.h>
22 #include <net/ip.h>
23 #include <net/flow_dissector.h>
24 #include <net/geneve.h>
25
26 #include <net/dst.h>
27 #include <net/dst_metadata.h>
28
29 #include <uapi/linux/netfilter/nf_conntrack_common.h>
30
31 struct fl_flow_key {
32 struct flow_dissector_key_meta meta;
33 struct flow_dissector_key_control control;
34 struct flow_dissector_key_control enc_control;
35 struct flow_dissector_key_basic basic;
36 struct flow_dissector_key_eth_addrs eth;
37 struct flow_dissector_key_vlan vlan;
38 struct flow_dissector_key_vlan cvlan;
39 union {
40 struct flow_dissector_key_ipv4_addrs ipv4;
41 struct flow_dissector_key_ipv6_addrs ipv6;
42 };
43 struct flow_dissector_key_ports tp;
44 struct flow_dissector_key_icmp icmp;
45 struct flow_dissector_key_arp arp;
46 struct flow_dissector_key_keyid enc_key_id;
47 union {
48 struct flow_dissector_key_ipv4_addrs enc_ipv4;
49 struct flow_dissector_key_ipv6_addrs enc_ipv6;
50 };
51 struct flow_dissector_key_ports enc_tp;
52 struct flow_dissector_key_mpls mpls;
53 struct flow_dissector_key_tcp tcp;
54 struct flow_dissector_key_ip ip;
55 struct flow_dissector_key_ip enc_ip;
56 struct flow_dissector_key_enc_opts enc_opts;
57 union {
58 struct flow_dissector_key_ports tp;
59 struct {
60 struct flow_dissector_key_ports tp_min;
61 struct flow_dissector_key_ports tp_max;
62 };
63 } tp_range;
64 struct flow_dissector_key_ct ct;
65 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
66
67 struct fl_flow_mask_range {
68 unsigned short int start;
69 unsigned short int end;
70 };
71
72 struct fl_flow_mask {
73 struct fl_flow_key key;
74 struct fl_flow_mask_range range;
75 u32 flags;
76 struct rhash_head ht_node;
77 struct rhashtable ht;
78 struct rhashtable_params filter_ht_params;
79 struct flow_dissector dissector;
80 struct list_head filters;
81 struct rcu_work rwork;
82 struct list_head list;
83 refcount_t refcnt;
84 };
85
86 struct fl_flow_tmplt {
87 struct fl_flow_key dummy_key;
88 struct fl_flow_key mask;
89 struct flow_dissector dissector;
90 struct tcf_chain *chain;
91 };
92
93 struct cls_fl_head {
94 struct rhashtable ht;
95 spinlock_t masks_lock; /* Protect masks list */
96 struct list_head masks;
97 struct list_head hw_filters;
98 struct rcu_work rwork;
99 struct idr handle_idr;
100 };
101
102 struct cls_fl_filter {
103 struct fl_flow_mask *mask;
104 struct rhash_head ht_node;
105 struct fl_flow_key mkey;
106 struct tcf_exts exts;
107 struct tcf_result res;
108 struct fl_flow_key key;
109 struct list_head list;
110 struct list_head hw_list;
111 u32 handle;
112 u32 flags;
113 u32 in_hw_count;
114 struct rcu_work rwork;
115 struct net_device *hw_dev;
116 /* Flower classifier is unlocked, which means that its reference counter
117 * can be changed concurrently without any kind of external
118 * synchronization. Use atomic reference counter to be concurrency-safe.
119 */
120 refcount_t refcnt;
121 bool deleted;
122 };
123
124 static const struct rhashtable_params mask_ht_params = {
125 .key_offset = offsetof(struct fl_flow_mask, key),
126 .key_len = sizeof(struct fl_flow_key),
127 .head_offset = offsetof(struct fl_flow_mask, ht_node),
128 .automatic_shrinking = true,
129 };
130
fl_mask_range(const struct fl_flow_mask * mask)131 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
132 {
133 return mask->range.end - mask->range.start;
134 }
135
fl_mask_update_range(struct fl_flow_mask * mask)136 static void fl_mask_update_range(struct fl_flow_mask *mask)
137 {
138 const u8 *bytes = (const u8 *) &mask->key;
139 size_t size = sizeof(mask->key);
140 size_t i, first = 0, last;
141
142 for (i = 0; i < size; i++) {
143 if (bytes[i]) {
144 first = i;
145 break;
146 }
147 }
148 last = first;
149 for (i = size - 1; i != first; i--) {
150 if (bytes[i]) {
151 last = i;
152 break;
153 }
154 }
155 mask->range.start = rounddown(first, sizeof(long));
156 mask->range.end = roundup(last + 1, sizeof(long));
157 }
158
fl_key_get_start(struct fl_flow_key * key,const struct fl_flow_mask * mask)159 static void *fl_key_get_start(struct fl_flow_key *key,
160 const struct fl_flow_mask *mask)
161 {
162 return (u8 *) key + mask->range.start;
163 }
164
fl_set_masked_key(struct fl_flow_key * mkey,struct fl_flow_key * key,struct fl_flow_mask * mask)165 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
166 struct fl_flow_mask *mask)
167 {
168 const long *lkey = fl_key_get_start(key, mask);
169 const long *lmask = fl_key_get_start(&mask->key, mask);
170 long *lmkey = fl_key_get_start(mkey, mask);
171 int i;
172
173 for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
174 *lmkey++ = *lkey++ & *lmask++;
175 }
176
fl_mask_fits_tmplt(struct fl_flow_tmplt * tmplt,struct fl_flow_mask * mask)177 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt,
178 struct fl_flow_mask *mask)
179 {
180 const long *lmask = fl_key_get_start(&mask->key, mask);
181 const long *ltmplt;
182 int i;
183
184 if (!tmplt)
185 return true;
186 ltmplt = fl_key_get_start(&tmplt->mask, mask);
187 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) {
188 if (~*ltmplt++ & *lmask++)
189 return false;
190 }
191 return true;
192 }
193
fl_clear_masked_range(struct fl_flow_key * key,struct fl_flow_mask * mask)194 static void fl_clear_masked_range(struct fl_flow_key *key,
195 struct fl_flow_mask *mask)
196 {
197 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
198 }
199
fl_range_port_dst_cmp(struct cls_fl_filter * filter,struct fl_flow_key * key,struct fl_flow_key * mkey)200 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter,
201 struct fl_flow_key *key,
202 struct fl_flow_key *mkey)
203 {
204 __be16 min_mask, max_mask, min_val, max_val;
205
206 min_mask = htons(filter->mask->key.tp_range.tp_min.dst);
207 max_mask = htons(filter->mask->key.tp_range.tp_max.dst);
208 min_val = htons(filter->key.tp_range.tp_min.dst);
209 max_val = htons(filter->key.tp_range.tp_max.dst);
210
211 if (min_mask && max_mask) {
212 if (htons(key->tp_range.tp.dst) < min_val ||
213 htons(key->tp_range.tp.dst) > max_val)
214 return false;
215
216 /* skb does not have min and max values */
217 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst;
218 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst;
219 }
220 return true;
221 }
222
fl_range_port_src_cmp(struct cls_fl_filter * filter,struct fl_flow_key * key,struct fl_flow_key * mkey)223 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter,
224 struct fl_flow_key *key,
225 struct fl_flow_key *mkey)
226 {
227 __be16 min_mask, max_mask, min_val, max_val;
228
229 min_mask = htons(filter->mask->key.tp_range.tp_min.src);
230 max_mask = htons(filter->mask->key.tp_range.tp_max.src);
231 min_val = htons(filter->key.tp_range.tp_min.src);
232 max_val = htons(filter->key.tp_range.tp_max.src);
233
234 if (min_mask && max_mask) {
235 if (htons(key->tp_range.tp.src) < min_val ||
236 htons(key->tp_range.tp.src) > max_val)
237 return false;
238
239 /* skb does not have min and max values */
240 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src;
241 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src;
242 }
243 return true;
244 }
245
__fl_lookup(struct fl_flow_mask * mask,struct fl_flow_key * mkey)246 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask,
247 struct fl_flow_key *mkey)
248 {
249 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask),
250 mask->filter_ht_params);
251 }
252
fl_lookup_range(struct fl_flow_mask * mask,struct fl_flow_key * mkey,struct fl_flow_key * key)253 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask,
254 struct fl_flow_key *mkey,
255 struct fl_flow_key *key)
256 {
257 struct cls_fl_filter *filter, *f;
258
259 list_for_each_entry_rcu(filter, &mask->filters, list) {
260 if (!fl_range_port_dst_cmp(filter, key, mkey))
261 continue;
262
263 if (!fl_range_port_src_cmp(filter, key, mkey))
264 continue;
265
266 f = __fl_lookup(mask, mkey);
267 if (f)
268 return f;
269 }
270 return NULL;
271 }
272
fl_lookup(struct fl_flow_mask * mask,struct fl_flow_key * mkey,struct fl_flow_key * key)273 static struct cls_fl_filter *fl_lookup(struct fl_flow_mask *mask,
274 struct fl_flow_key *mkey,
275 struct fl_flow_key *key)
276 {
277 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE))
278 return fl_lookup_range(mask, mkey, key);
279
280 return __fl_lookup(mask, mkey);
281 }
282
283 static u16 fl_ct_info_to_flower_map[] = {
284 [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
285 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED,
286 [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
287 TCA_FLOWER_KEY_CT_FLAGS_RELATED,
288 [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
289 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED,
290 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
291 TCA_FLOWER_KEY_CT_FLAGS_RELATED,
292 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
293 TCA_FLOWER_KEY_CT_FLAGS_NEW,
294 };
295
fl_classify(struct sk_buff * skb,const struct tcf_proto * tp,struct tcf_result * res)296 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
297 struct tcf_result *res)
298 {
299 struct cls_fl_head *head = rcu_dereference_bh(tp->root);
300 struct fl_flow_key skb_mkey;
301 struct fl_flow_key skb_key;
302 struct fl_flow_mask *mask;
303 struct cls_fl_filter *f;
304
305 list_for_each_entry_rcu(mask, &head->masks, list) {
306 fl_clear_masked_range(&skb_key, mask);
307
308 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key);
309 /* skb_flow_dissect() does not set n_proto in case an unknown
310 * protocol, so do it rather here.
311 */
312 skb_key.basic.n_proto = skb->protocol;
313 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key);
314 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key,
315 fl_ct_info_to_flower_map,
316 ARRAY_SIZE(fl_ct_info_to_flower_map));
317 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0);
318
319 fl_set_masked_key(&skb_mkey, &skb_key, mask);
320
321 f = fl_lookup(mask, &skb_mkey, &skb_key);
322 if (f && !tc_skip_sw(f->flags)) {
323 *res = f->res;
324 return tcf_exts_exec(skb, &f->exts, res);
325 }
326 }
327 return -1;
328 }
329
fl_init(struct tcf_proto * tp)330 static int fl_init(struct tcf_proto *tp)
331 {
332 struct cls_fl_head *head;
333
334 head = kzalloc(sizeof(*head), GFP_KERNEL);
335 if (!head)
336 return -ENOBUFS;
337
338 spin_lock_init(&head->masks_lock);
339 INIT_LIST_HEAD_RCU(&head->masks);
340 INIT_LIST_HEAD(&head->hw_filters);
341 rcu_assign_pointer(tp->root, head);
342 idr_init(&head->handle_idr);
343
344 return rhashtable_init(&head->ht, &mask_ht_params);
345 }
346
fl_mask_free(struct fl_flow_mask * mask,bool mask_init_done)347 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done)
348 {
349 /* temporary masks don't have their filters list and ht initialized */
350 if (mask_init_done) {
351 WARN_ON(!list_empty(&mask->filters));
352 rhashtable_destroy(&mask->ht);
353 }
354 kfree(mask);
355 }
356
fl_mask_free_work(struct work_struct * work)357 static void fl_mask_free_work(struct work_struct *work)
358 {
359 struct fl_flow_mask *mask = container_of(to_rcu_work(work),
360 struct fl_flow_mask, rwork);
361
362 fl_mask_free(mask, true);
363 }
364
fl_uninit_mask_free_work(struct work_struct * work)365 static void fl_uninit_mask_free_work(struct work_struct *work)
366 {
367 struct fl_flow_mask *mask = container_of(to_rcu_work(work),
368 struct fl_flow_mask, rwork);
369
370 fl_mask_free(mask, false);
371 }
372
fl_mask_put(struct cls_fl_head * head,struct fl_flow_mask * mask)373 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask)
374 {
375 if (!refcount_dec_and_test(&mask->refcnt))
376 return false;
377
378 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
379
380 spin_lock(&head->masks_lock);
381 list_del_rcu(&mask->list);
382 spin_unlock(&head->masks_lock);
383
384 tcf_queue_work(&mask->rwork, fl_mask_free_work);
385
386 return true;
387 }
388
fl_head_dereference(struct tcf_proto * tp)389 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp)
390 {
391 /* Flower classifier only changes root pointer during init and destroy.
392 * Users must obtain reference to tcf_proto instance before calling its
393 * API, so tp->root pointer is protected from concurrent call to
394 * fl_destroy() by reference counting.
395 */
396 return rcu_dereference_raw(tp->root);
397 }
398
__fl_destroy_filter(struct cls_fl_filter * f)399 static void __fl_destroy_filter(struct cls_fl_filter *f)
400 {
401 tcf_exts_destroy(&f->exts);
402 tcf_exts_put_net(&f->exts);
403 kfree(f);
404 }
405
fl_destroy_filter_work(struct work_struct * work)406 static void fl_destroy_filter_work(struct work_struct *work)
407 {
408 struct cls_fl_filter *f = container_of(to_rcu_work(work),
409 struct cls_fl_filter, rwork);
410
411 __fl_destroy_filter(f);
412 }
413
fl_hw_destroy_filter(struct tcf_proto * tp,struct cls_fl_filter * f,bool rtnl_held,struct netlink_ext_ack * extack)414 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
415 bool rtnl_held, struct netlink_ext_ack *extack)
416 {
417 struct tcf_block *block = tp->chain->block;
418 struct flow_cls_offload cls_flower = {};
419
420 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
421 cls_flower.command = FLOW_CLS_DESTROY;
422 cls_flower.cookie = (unsigned long) f;
423
424 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false,
425 &f->flags, &f->in_hw_count, rtnl_held);
426
427 }
428
fl_hw_replace_filter(struct tcf_proto * tp,struct cls_fl_filter * f,bool rtnl_held,struct netlink_ext_ack * extack)429 static int fl_hw_replace_filter(struct tcf_proto *tp,
430 struct cls_fl_filter *f, bool rtnl_held,
431 struct netlink_ext_ack *extack)
432 {
433 struct tcf_block *block = tp->chain->block;
434 struct flow_cls_offload cls_flower = {};
435 bool skip_sw = tc_skip_sw(f->flags);
436 int err = 0;
437
438 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts));
439 if (!cls_flower.rule)
440 return -ENOMEM;
441
442 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
443 cls_flower.command = FLOW_CLS_REPLACE;
444 cls_flower.cookie = (unsigned long) f;
445 cls_flower.rule->match.dissector = &f->mask->dissector;
446 cls_flower.rule->match.mask = &f->mask->key;
447 cls_flower.rule->match.key = &f->mkey;
448 cls_flower.classid = f->res.classid;
449
450 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts,
451 rtnl_held);
452 if (err) {
453 kfree(cls_flower.rule);
454 if (skip_sw) {
455 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
456 return err;
457 }
458 return 0;
459 }
460
461 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower,
462 skip_sw, &f->flags, &f->in_hw_count, rtnl_held);
463 tc_cleanup_flow_action(&cls_flower.rule->action);
464 kfree(cls_flower.rule);
465
466 if (err) {
467 fl_hw_destroy_filter(tp, f, rtnl_held, NULL);
468 return err;
469 }
470
471 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
472 return -EINVAL;
473
474 return 0;
475 }
476
fl_hw_update_stats(struct tcf_proto * tp,struct cls_fl_filter * f,bool rtnl_held)477 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f,
478 bool rtnl_held)
479 {
480 struct tcf_block *block = tp->chain->block;
481 struct flow_cls_offload cls_flower = {};
482
483 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
484 cls_flower.command = FLOW_CLS_STATS;
485 cls_flower.cookie = (unsigned long) f;
486 cls_flower.classid = f->res.classid;
487
488 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false,
489 rtnl_held);
490
491 tcf_exts_stats_update(&f->exts, cls_flower.stats.bytes,
492 cls_flower.stats.pkts,
493 cls_flower.stats.lastused);
494 }
495
__fl_put(struct cls_fl_filter * f)496 static void __fl_put(struct cls_fl_filter *f)
497 {
498 if (!refcount_dec_and_test(&f->refcnt))
499 return;
500
501 if (tcf_exts_get_net(&f->exts))
502 tcf_queue_work(&f->rwork, fl_destroy_filter_work);
503 else
504 __fl_destroy_filter(f);
505 }
506
__fl_get(struct cls_fl_head * head,u32 handle)507 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle)
508 {
509 struct cls_fl_filter *f;
510
511 rcu_read_lock();
512 f = idr_find(&head->handle_idr, handle);
513 if (f && !refcount_inc_not_zero(&f->refcnt))
514 f = NULL;
515 rcu_read_unlock();
516
517 return f;
518 }
519
__fl_delete(struct tcf_proto * tp,struct cls_fl_filter * f,bool * last,bool rtnl_held,struct netlink_ext_ack * extack)520 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
521 bool *last, bool rtnl_held,
522 struct netlink_ext_ack *extack)
523 {
524 struct cls_fl_head *head = fl_head_dereference(tp);
525
526 *last = false;
527
528 spin_lock(&tp->lock);
529 if (f->deleted) {
530 spin_unlock(&tp->lock);
531 return -ENOENT;
532 }
533
534 f->deleted = true;
535 rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
536 f->mask->filter_ht_params);
537 idr_remove(&head->handle_idr, f->handle);
538 list_del_rcu(&f->list);
539 spin_unlock(&tp->lock);
540
541 *last = fl_mask_put(head, f->mask);
542 if (!tc_skip_hw(f->flags))
543 fl_hw_destroy_filter(tp, f, rtnl_held, extack);
544 tcf_unbind_filter(tp, &f->res);
545 __fl_put(f);
546
547 return 0;
548 }
549
fl_destroy_sleepable(struct work_struct * work)550 static void fl_destroy_sleepable(struct work_struct *work)
551 {
552 struct cls_fl_head *head = container_of(to_rcu_work(work),
553 struct cls_fl_head,
554 rwork);
555
556 rhashtable_destroy(&head->ht);
557 kfree(head);
558 module_put(THIS_MODULE);
559 }
560
fl_destroy(struct tcf_proto * tp,bool rtnl_held,struct netlink_ext_ack * extack)561 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held,
562 struct netlink_ext_ack *extack)
563 {
564 struct cls_fl_head *head = fl_head_dereference(tp);
565 struct fl_flow_mask *mask, *next_mask;
566 struct cls_fl_filter *f, *next;
567 bool last;
568
569 list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
570 list_for_each_entry_safe(f, next, &mask->filters, list) {
571 __fl_delete(tp, f, &last, rtnl_held, extack);
572 if (last)
573 break;
574 }
575 }
576 idr_destroy(&head->handle_idr);
577
578 __module_get(THIS_MODULE);
579 tcf_queue_work(&head->rwork, fl_destroy_sleepable);
580 }
581
fl_put(struct tcf_proto * tp,void * arg)582 static void fl_put(struct tcf_proto *tp, void *arg)
583 {
584 struct cls_fl_filter *f = arg;
585
586 __fl_put(f);
587 }
588
fl_get(struct tcf_proto * tp,u32 handle)589 static void *fl_get(struct tcf_proto *tp, u32 handle)
590 {
591 struct cls_fl_head *head = fl_head_dereference(tp);
592
593 return __fl_get(head, handle);
594 }
595
596 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
597 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
598 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
599 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
600 .len = IFNAMSIZ },
601 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
602 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
603 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
604 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
605 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
606 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
607 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
608 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
609 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
610 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
611 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
612 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
613 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
614 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
615 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
616 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
617 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
618 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
619 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
620 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
621 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
622 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
623 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
624 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
625 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
626 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
627 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
628 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
629 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
630 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
631 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
632 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
633 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
634 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
635 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 },
636 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 },
637 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 },
638 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 },
639 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 },
640 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 },
641 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 },
642 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 },
643 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 },
644 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 },
645 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 },
646 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
647 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 },
648 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
649 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 },
650 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
651 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 },
652 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
653 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 },
654 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 },
655 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 },
656 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 },
657 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 },
658 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 },
659 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN },
660 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN },
661 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN },
662 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN },
663 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 },
664 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 },
665 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 },
666 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 },
667 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 },
668 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
669 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 },
670 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 },
671 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 },
672 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 },
673 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 },
674 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 },
675 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 },
676 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 },
677 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
678 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 },
679 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
680 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED },
681 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED },
682 [TCA_FLOWER_KEY_CT_STATE] = { .type = NLA_U16 },
683 [TCA_FLOWER_KEY_CT_STATE_MASK] = { .type = NLA_U16 },
684 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 },
685 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 },
686 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 },
687 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 },
688 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY,
689 .len = 128 / BITS_PER_BYTE },
690 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY,
691 .len = 128 / BITS_PER_BYTE },
692 };
693
694 static const struct nla_policy
695 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
696 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED },
697 };
698
699 static const struct nla_policy
700 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = {
701 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 },
702 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 },
703 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY,
704 .len = 128 },
705 };
706
fl_set_key_val(struct nlattr ** tb,void * val,int val_type,void * mask,int mask_type,int len)707 static void fl_set_key_val(struct nlattr **tb,
708 void *val, int val_type,
709 void *mask, int mask_type, int len)
710 {
711 if (!tb[val_type])
712 return;
713 nla_memcpy(val, tb[val_type], len);
714 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
715 memset(mask, 0xff, len);
716 else
717 nla_memcpy(mask, tb[mask_type], len);
718 }
719
fl_set_key_port_range(struct nlattr ** tb,struct fl_flow_key * key,struct fl_flow_key * mask)720 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key,
721 struct fl_flow_key *mask)
722 {
723 fl_set_key_val(tb, &key->tp_range.tp_min.dst,
724 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst,
725 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst));
726 fl_set_key_val(tb, &key->tp_range.tp_max.dst,
727 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst,
728 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst));
729 fl_set_key_val(tb, &key->tp_range.tp_min.src,
730 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src,
731 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src));
732 fl_set_key_val(tb, &key->tp_range.tp_max.src,
733 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src,
734 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src));
735
736 if ((mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst &&
737 htons(key->tp_range.tp_max.dst) <=
738 htons(key->tp_range.tp_min.dst)) ||
739 (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src &&
740 htons(key->tp_range.tp_max.src) <=
741 htons(key->tp_range.tp_min.src)))
742 return -EINVAL;
743
744 return 0;
745 }
746
fl_set_key_mpls(struct nlattr ** tb,struct flow_dissector_key_mpls * key_val,struct flow_dissector_key_mpls * key_mask)747 static int fl_set_key_mpls(struct nlattr **tb,
748 struct flow_dissector_key_mpls *key_val,
749 struct flow_dissector_key_mpls *key_mask)
750 {
751 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
752 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
753 key_mask->mpls_ttl = MPLS_TTL_MASK;
754 }
755 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
756 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
757
758 if (bos & ~MPLS_BOS_MASK)
759 return -EINVAL;
760 key_val->mpls_bos = bos;
761 key_mask->mpls_bos = MPLS_BOS_MASK;
762 }
763 if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
764 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
765
766 if (tc & ~MPLS_TC_MASK)
767 return -EINVAL;
768 key_val->mpls_tc = tc;
769 key_mask->mpls_tc = MPLS_TC_MASK;
770 }
771 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
772 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
773
774 if (label & ~MPLS_LABEL_MASK)
775 return -EINVAL;
776 key_val->mpls_label = label;
777 key_mask->mpls_label = MPLS_LABEL_MASK;
778 }
779 return 0;
780 }
781
fl_set_key_vlan(struct nlattr ** tb,__be16 ethertype,int vlan_id_key,int vlan_prio_key,struct flow_dissector_key_vlan * key_val,struct flow_dissector_key_vlan * key_mask)782 static void fl_set_key_vlan(struct nlattr **tb,
783 __be16 ethertype,
784 int vlan_id_key, int vlan_prio_key,
785 struct flow_dissector_key_vlan *key_val,
786 struct flow_dissector_key_vlan *key_mask)
787 {
788 #define VLAN_PRIORITY_MASK 0x7
789
790 if (tb[vlan_id_key]) {
791 key_val->vlan_id =
792 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
793 key_mask->vlan_id = VLAN_VID_MASK;
794 }
795 if (tb[vlan_prio_key]) {
796 key_val->vlan_priority =
797 nla_get_u8(tb[vlan_prio_key]) &
798 VLAN_PRIORITY_MASK;
799 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
800 }
801 key_val->vlan_tpid = ethertype;
802 key_mask->vlan_tpid = cpu_to_be16(~0);
803 }
804
fl_set_key_flag(u32 flower_key,u32 flower_mask,u32 * dissector_key,u32 * dissector_mask,u32 flower_flag_bit,u32 dissector_flag_bit)805 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
806 u32 *dissector_key, u32 *dissector_mask,
807 u32 flower_flag_bit, u32 dissector_flag_bit)
808 {
809 if (flower_mask & flower_flag_bit) {
810 *dissector_mask |= dissector_flag_bit;
811 if (flower_key & flower_flag_bit)
812 *dissector_key |= dissector_flag_bit;
813 }
814 }
815
fl_set_key_flags(struct nlattr ** tb,u32 * flags_key,u32 * flags_mask)816 static int fl_set_key_flags(struct nlattr **tb,
817 u32 *flags_key, u32 *flags_mask)
818 {
819 u32 key, mask;
820
821 /* mask is mandatory for flags */
822 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
823 return -EINVAL;
824
825 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
826 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
827
828 *flags_key = 0;
829 *flags_mask = 0;
830
831 fl_set_key_flag(key, mask, flags_key, flags_mask,
832 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
833 fl_set_key_flag(key, mask, flags_key, flags_mask,
834 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
835 FLOW_DIS_FIRST_FRAG);
836
837 return 0;
838 }
839
fl_set_key_ip(struct nlattr ** tb,bool encap,struct flow_dissector_key_ip * key,struct flow_dissector_key_ip * mask)840 static void fl_set_key_ip(struct nlattr **tb, bool encap,
841 struct flow_dissector_key_ip *key,
842 struct flow_dissector_key_ip *mask)
843 {
844 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
845 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
846 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
847 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
848
849 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
850 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
851 }
852
fl_set_geneve_opt(const struct nlattr * nla,struct fl_flow_key * key,int depth,int option_len,struct netlink_ext_ack * extack)853 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
854 int depth, int option_len,
855 struct netlink_ext_ack *extack)
856 {
857 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
858 struct nlattr *class = NULL, *type = NULL, *data = NULL;
859 struct geneve_opt *opt;
860 int err, data_len = 0;
861
862 if (option_len > sizeof(struct geneve_opt))
863 data_len = option_len - sizeof(struct geneve_opt);
864
865 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
866 memset(opt, 0xff, option_len);
867 opt->length = data_len / 4;
868 opt->r1 = 0;
869 opt->r2 = 0;
870 opt->r3 = 0;
871
872 /* If no mask has been prodived we assume an exact match. */
873 if (!depth)
874 return sizeof(struct geneve_opt) + data_len;
875
876 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
877 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
878 return -EINVAL;
879 }
880
881 err = nla_parse_nested_deprecated(tb,
882 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
883 nla, geneve_opt_policy, extack);
884 if (err < 0)
885 return err;
886
887 /* We are not allowed to omit any of CLASS, TYPE or DATA
888 * fields from the key.
889 */
890 if (!option_len &&
891 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
892 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
893 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
894 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
895 return -EINVAL;
896 }
897
898 /* Omitting any of CLASS, TYPE or DATA fields is allowed
899 * for the mask.
900 */
901 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
902 int new_len = key->enc_opts.len;
903
904 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
905 data_len = nla_len(data);
906 if (data_len < 4) {
907 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
908 return -ERANGE;
909 }
910 if (data_len % 4) {
911 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
912 return -ERANGE;
913 }
914
915 new_len += sizeof(struct geneve_opt) + data_len;
916 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
917 if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
918 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
919 return -ERANGE;
920 }
921 opt->length = data_len / 4;
922 memcpy(opt->opt_data, nla_data(data), data_len);
923 }
924
925 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
926 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
927 opt->opt_class = nla_get_be16(class);
928 }
929
930 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
931 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
932 opt->type = nla_get_u8(type);
933 }
934
935 return sizeof(struct geneve_opt) + data_len;
936 }
937
fl_set_enc_opt(struct nlattr ** tb,struct fl_flow_key * key,struct fl_flow_key * mask,struct netlink_ext_ack * extack)938 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
939 struct fl_flow_key *mask,
940 struct netlink_ext_ack *extack)
941 {
942 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
943 int err, option_len, key_depth, msk_depth = 0;
944
945 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS],
946 TCA_FLOWER_KEY_ENC_OPTS_MAX,
947 enc_opts_policy, extack);
948 if (err)
949 return err;
950
951 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
952
953 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
954 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
955 TCA_FLOWER_KEY_ENC_OPTS_MAX,
956 enc_opts_policy, extack);
957 if (err)
958 return err;
959
960 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
961 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
962 }
963
964 nla_for_each_attr(nla_opt_key, nla_enc_key,
965 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
966 switch (nla_type(nla_opt_key)) {
967 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
968 option_len = 0;
969 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
970 option_len = fl_set_geneve_opt(nla_opt_key, key,
971 key_depth, option_len,
972 extack);
973 if (option_len < 0)
974 return option_len;
975
976 key->enc_opts.len += option_len;
977 /* At the same time we need to parse through the mask
978 * in order to verify exact and mask attribute lengths.
979 */
980 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
981 option_len = fl_set_geneve_opt(nla_opt_msk, mask,
982 msk_depth, option_len,
983 extack);
984 if (option_len < 0)
985 return option_len;
986
987 mask->enc_opts.len += option_len;
988 if (key->enc_opts.len != mask->enc_opts.len) {
989 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
990 return -EINVAL;
991 }
992
993 if (msk_depth)
994 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
995 break;
996 default:
997 NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
998 return -EINVAL;
999 }
1000 }
1001
1002 return 0;
1003 }
1004
fl_set_key_ct(struct nlattr ** tb,struct flow_dissector_key_ct * key,struct flow_dissector_key_ct * mask,struct netlink_ext_ack * extack)1005 static int fl_set_key_ct(struct nlattr **tb,
1006 struct flow_dissector_key_ct *key,
1007 struct flow_dissector_key_ct *mask,
1008 struct netlink_ext_ack *extack)
1009 {
1010 if (tb[TCA_FLOWER_KEY_CT_STATE]) {
1011 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) {
1012 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled");
1013 return -EOPNOTSUPP;
1014 }
1015 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
1016 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
1017 sizeof(key->ct_state));
1018 }
1019 if (tb[TCA_FLOWER_KEY_CT_ZONE]) {
1020 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
1021 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled");
1022 return -EOPNOTSUPP;
1023 }
1024 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
1025 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
1026 sizeof(key->ct_zone));
1027 }
1028 if (tb[TCA_FLOWER_KEY_CT_MARK]) {
1029 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
1030 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled");
1031 return -EOPNOTSUPP;
1032 }
1033 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
1034 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
1035 sizeof(key->ct_mark));
1036 }
1037 if (tb[TCA_FLOWER_KEY_CT_LABELS]) {
1038 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
1039 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled");
1040 return -EOPNOTSUPP;
1041 }
1042 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
1043 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
1044 sizeof(key->ct_labels));
1045 }
1046
1047 return 0;
1048 }
1049
fl_set_key(struct net * net,struct nlattr ** tb,struct fl_flow_key * key,struct fl_flow_key * mask,struct netlink_ext_ack * extack)1050 static int fl_set_key(struct net *net, struct nlattr **tb,
1051 struct fl_flow_key *key, struct fl_flow_key *mask,
1052 struct netlink_ext_ack *extack)
1053 {
1054 __be16 ethertype;
1055 int ret = 0;
1056
1057 if (tb[TCA_FLOWER_INDEV]) {
1058 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
1059 if (err < 0)
1060 return err;
1061 key->meta.ingress_ifindex = err;
1062 mask->meta.ingress_ifindex = 0xffffffff;
1063 }
1064
1065 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1066 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1067 sizeof(key->eth.dst));
1068 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1069 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1070 sizeof(key->eth.src));
1071
1072 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
1073 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
1074
1075 if (eth_type_vlan(ethertype)) {
1076 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
1077 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan,
1078 &mask->vlan);
1079
1080 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) {
1081 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]);
1082 if (eth_type_vlan(ethertype)) {
1083 fl_set_key_vlan(tb, ethertype,
1084 TCA_FLOWER_KEY_CVLAN_ID,
1085 TCA_FLOWER_KEY_CVLAN_PRIO,
1086 &key->cvlan, &mask->cvlan);
1087 fl_set_key_val(tb, &key->basic.n_proto,
1088 TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1089 &mask->basic.n_proto,
1090 TCA_FLOWER_UNSPEC,
1091 sizeof(key->basic.n_proto));
1092 } else {
1093 key->basic.n_proto = ethertype;
1094 mask->basic.n_proto = cpu_to_be16(~0);
1095 }
1096 }
1097 } else {
1098 key->basic.n_proto = ethertype;
1099 mask->basic.n_proto = cpu_to_be16(~0);
1100 }
1101 }
1102
1103 if (key->basic.n_proto == htons(ETH_P_IP) ||
1104 key->basic.n_proto == htons(ETH_P_IPV6)) {
1105 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1106 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1107 sizeof(key->basic.ip_proto));
1108 fl_set_key_ip(tb, false, &key->ip, &mask->ip);
1109 }
1110
1111 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
1112 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1113 mask->control.addr_type = ~0;
1114 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1115 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1116 sizeof(key->ipv4.src));
1117 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1118 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1119 sizeof(key->ipv4.dst));
1120 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
1121 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1122 mask->control.addr_type = ~0;
1123 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1124 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1125 sizeof(key->ipv6.src));
1126 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1127 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1128 sizeof(key->ipv6.dst));
1129 }
1130
1131 if (key->basic.ip_proto == IPPROTO_TCP) {
1132 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1133 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1134 sizeof(key->tp.src));
1135 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1136 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1137 sizeof(key->tp.dst));
1138 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1139 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1140 sizeof(key->tcp.flags));
1141 } else if (key->basic.ip_proto == IPPROTO_UDP) {
1142 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1143 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1144 sizeof(key->tp.src));
1145 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1146 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1147 sizeof(key->tp.dst));
1148 } else if (key->basic.ip_proto == IPPROTO_SCTP) {
1149 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1150 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1151 sizeof(key->tp.src));
1152 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1153 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1154 sizeof(key->tp.dst));
1155 } else if (key->basic.n_proto == htons(ETH_P_IP) &&
1156 key->basic.ip_proto == IPPROTO_ICMP) {
1157 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
1158 &mask->icmp.type,
1159 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1160 sizeof(key->icmp.type));
1161 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
1162 &mask->icmp.code,
1163 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1164 sizeof(key->icmp.code));
1165 } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1166 key->basic.ip_proto == IPPROTO_ICMPV6) {
1167 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
1168 &mask->icmp.type,
1169 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1170 sizeof(key->icmp.type));
1171 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
1172 &mask->icmp.code,
1173 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1174 sizeof(key->icmp.code));
1175 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
1176 key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
1177 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
1178 if (ret)
1179 return ret;
1180 } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
1181 key->basic.n_proto == htons(ETH_P_RARP)) {
1182 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
1183 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
1184 sizeof(key->arp.sip));
1185 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
1186 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
1187 sizeof(key->arp.tip));
1188 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
1189 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
1190 sizeof(key->arp.op));
1191 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1192 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1193 sizeof(key->arp.sha));
1194 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1195 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1196 sizeof(key->arp.tha));
1197 }
1198
1199 if (key->basic.ip_proto == IPPROTO_TCP ||
1200 key->basic.ip_proto == IPPROTO_UDP ||
1201 key->basic.ip_proto == IPPROTO_SCTP) {
1202 ret = fl_set_key_port_range(tb, key, mask);
1203 if (ret)
1204 return ret;
1205 }
1206
1207 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
1208 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
1209 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1210 mask->enc_control.addr_type = ~0;
1211 fl_set_key_val(tb, &key->enc_ipv4.src,
1212 TCA_FLOWER_KEY_ENC_IPV4_SRC,
1213 &mask->enc_ipv4.src,
1214 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1215 sizeof(key->enc_ipv4.src));
1216 fl_set_key_val(tb, &key->enc_ipv4.dst,
1217 TCA_FLOWER_KEY_ENC_IPV4_DST,
1218 &mask->enc_ipv4.dst,
1219 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1220 sizeof(key->enc_ipv4.dst));
1221 }
1222
1223 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
1224 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
1225 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1226 mask->enc_control.addr_type = ~0;
1227 fl_set_key_val(tb, &key->enc_ipv6.src,
1228 TCA_FLOWER_KEY_ENC_IPV6_SRC,
1229 &mask->enc_ipv6.src,
1230 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1231 sizeof(key->enc_ipv6.src));
1232 fl_set_key_val(tb, &key->enc_ipv6.dst,
1233 TCA_FLOWER_KEY_ENC_IPV6_DST,
1234 &mask->enc_ipv6.dst,
1235 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1236 sizeof(key->enc_ipv6.dst));
1237 }
1238
1239 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
1240 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
1241 sizeof(key->enc_key_id.keyid));
1242
1243 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1244 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1245 sizeof(key->enc_tp.src));
1246
1247 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1248 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1249 sizeof(key->enc_tp.dst));
1250
1251 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
1252
1253 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
1254 ret = fl_set_enc_opt(tb, key, mask, extack);
1255 if (ret)
1256 return ret;
1257 }
1258
1259 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack);
1260 if (ret)
1261 return ret;
1262
1263 if (tb[TCA_FLOWER_KEY_FLAGS])
1264 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
1265
1266 return ret;
1267 }
1268
fl_mask_copy(struct fl_flow_mask * dst,struct fl_flow_mask * src)1269 static void fl_mask_copy(struct fl_flow_mask *dst,
1270 struct fl_flow_mask *src)
1271 {
1272 const void *psrc = fl_key_get_start(&src->key, src);
1273 void *pdst = fl_key_get_start(&dst->key, src);
1274
1275 memcpy(pdst, psrc, fl_mask_range(src));
1276 dst->range = src->range;
1277 }
1278
1279 static const struct rhashtable_params fl_ht_params = {
1280 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
1281 .head_offset = offsetof(struct cls_fl_filter, ht_node),
1282 .automatic_shrinking = true,
1283 };
1284
fl_init_mask_hashtable(struct fl_flow_mask * mask)1285 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
1286 {
1287 mask->filter_ht_params = fl_ht_params;
1288 mask->filter_ht_params.key_len = fl_mask_range(mask);
1289 mask->filter_ht_params.key_offset += mask->range.start;
1290
1291 return rhashtable_init(&mask->ht, &mask->filter_ht_params);
1292 }
1293
1294 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
1295 #define FL_KEY_MEMBER_SIZE(member) FIELD_SIZEOF(struct fl_flow_key, member)
1296
1297 #define FL_KEY_IS_MASKED(mask, member) \
1298 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
1299 0, FL_KEY_MEMBER_SIZE(member)) \
1300
1301 #define FL_KEY_SET(keys, cnt, id, member) \
1302 do { \
1303 keys[cnt].key_id = id; \
1304 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
1305 cnt++; \
1306 } while(0);
1307
1308 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
1309 do { \
1310 if (FL_KEY_IS_MASKED(mask, member)) \
1311 FL_KEY_SET(keys, cnt, id, member); \
1312 } while(0);
1313
fl_init_dissector(struct flow_dissector * dissector,struct fl_flow_key * mask)1314 static void fl_init_dissector(struct flow_dissector *dissector,
1315 struct fl_flow_key *mask)
1316 {
1317 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
1318 size_t cnt = 0;
1319
1320 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1321 FLOW_DISSECTOR_KEY_META, meta);
1322 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
1323 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
1324 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1325 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
1326 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1327 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
1328 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1329 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
1330 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1331 FLOW_DISSECTOR_KEY_PORTS, tp);
1332 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1333 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range);
1334 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1335 FLOW_DISSECTOR_KEY_IP, ip);
1336 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1337 FLOW_DISSECTOR_KEY_TCP, tcp);
1338 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1339 FLOW_DISSECTOR_KEY_ICMP, icmp);
1340 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1341 FLOW_DISSECTOR_KEY_ARP, arp);
1342 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1343 FLOW_DISSECTOR_KEY_MPLS, mpls);
1344 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1345 FLOW_DISSECTOR_KEY_VLAN, vlan);
1346 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1347 FLOW_DISSECTOR_KEY_CVLAN, cvlan);
1348 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1349 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
1350 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1351 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
1352 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1353 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
1354 if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
1355 FL_KEY_IS_MASKED(mask, enc_ipv6))
1356 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
1357 enc_control);
1358 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1359 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
1360 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1361 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
1362 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1363 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
1364 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1365 FLOW_DISSECTOR_KEY_CT, ct);
1366
1367 skb_flow_dissector_init(dissector, keys, cnt);
1368 }
1369
fl_create_new_mask(struct cls_fl_head * head,struct fl_flow_mask * mask)1370 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
1371 struct fl_flow_mask *mask)
1372 {
1373 struct fl_flow_mask *newmask;
1374 int err;
1375
1376 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
1377 if (!newmask)
1378 return ERR_PTR(-ENOMEM);
1379
1380 fl_mask_copy(newmask, mask);
1381
1382 if ((newmask->key.tp_range.tp_min.dst &&
1383 newmask->key.tp_range.tp_max.dst) ||
1384 (newmask->key.tp_range.tp_min.src &&
1385 newmask->key.tp_range.tp_max.src))
1386 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE;
1387
1388 err = fl_init_mask_hashtable(newmask);
1389 if (err)
1390 goto errout_free;
1391
1392 fl_init_dissector(&newmask->dissector, &newmask->key);
1393
1394 INIT_LIST_HEAD_RCU(&newmask->filters);
1395
1396 refcount_set(&newmask->refcnt, 1);
1397 err = rhashtable_replace_fast(&head->ht, &mask->ht_node,
1398 &newmask->ht_node, mask_ht_params);
1399 if (err)
1400 goto errout_destroy;
1401
1402 spin_lock(&head->masks_lock);
1403 list_add_tail_rcu(&newmask->list, &head->masks);
1404 spin_unlock(&head->masks_lock);
1405
1406 return newmask;
1407
1408 errout_destroy:
1409 rhashtable_destroy(&newmask->ht);
1410 errout_free:
1411 kfree(newmask);
1412
1413 return ERR_PTR(err);
1414 }
1415
fl_check_assign_mask(struct cls_fl_head * head,struct cls_fl_filter * fnew,struct cls_fl_filter * fold,struct fl_flow_mask * mask)1416 static int fl_check_assign_mask(struct cls_fl_head *head,
1417 struct cls_fl_filter *fnew,
1418 struct cls_fl_filter *fold,
1419 struct fl_flow_mask *mask)
1420 {
1421 struct fl_flow_mask *newmask;
1422 int ret = 0;
1423
1424 rcu_read_lock();
1425
1426 /* Insert mask as temporary node to prevent concurrent creation of mask
1427 * with same key. Any concurrent lookups with same key will return
1428 * -EAGAIN because mask's refcnt is zero.
1429 */
1430 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht,
1431 &mask->ht_node,
1432 mask_ht_params);
1433 if (!fnew->mask) {
1434 rcu_read_unlock();
1435
1436 if (fold) {
1437 ret = -EINVAL;
1438 goto errout_cleanup;
1439 }
1440
1441 newmask = fl_create_new_mask(head, mask);
1442 if (IS_ERR(newmask)) {
1443 ret = PTR_ERR(newmask);
1444 goto errout_cleanup;
1445 }
1446
1447 fnew->mask = newmask;
1448 return 0;
1449 } else if (IS_ERR(fnew->mask)) {
1450 ret = PTR_ERR(fnew->mask);
1451 } else if (fold && fold->mask != fnew->mask) {
1452 ret = -EINVAL;
1453 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) {
1454 /* Mask was deleted concurrently, try again */
1455 ret = -EAGAIN;
1456 }
1457 rcu_read_unlock();
1458 return ret;
1459
1460 errout_cleanup:
1461 rhashtable_remove_fast(&head->ht, &mask->ht_node,
1462 mask_ht_params);
1463 return ret;
1464 }
1465
fl_set_parms(struct net * net,struct tcf_proto * tp,struct cls_fl_filter * f,struct fl_flow_mask * mask,unsigned long base,struct nlattr ** tb,struct nlattr * est,bool ovr,struct fl_flow_tmplt * tmplt,bool rtnl_held,struct netlink_ext_ack * extack)1466 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
1467 struct cls_fl_filter *f, struct fl_flow_mask *mask,
1468 unsigned long base, struct nlattr **tb,
1469 struct nlattr *est, bool ovr,
1470 struct fl_flow_tmplt *tmplt, bool rtnl_held,
1471 struct netlink_ext_ack *extack)
1472 {
1473 int err;
1474
1475 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, rtnl_held,
1476 extack);
1477 if (err < 0)
1478 return err;
1479
1480 if (tb[TCA_FLOWER_CLASSID]) {
1481 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
1482 if (!rtnl_held)
1483 rtnl_lock();
1484 tcf_bind_filter(tp, &f->res, base);
1485 if (!rtnl_held)
1486 rtnl_unlock();
1487 }
1488
1489 err = fl_set_key(net, tb, &f->key, &mask->key, extack);
1490 if (err)
1491 return err;
1492
1493 fl_mask_update_range(mask);
1494 fl_set_masked_key(&f->mkey, &f->key, mask);
1495
1496 if (!fl_mask_fits_tmplt(tmplt, mask)) {
1497 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
1498 return -EINVAL;
1499 }
1500
1501 return 0;
1502 }
1503
fl_ht_insert_unique(struct cls_fl_filter * fnew,struct cls_fl_filter * fold,bool * in_ht)1504 static int fl_ht_insert_unique(struct cls_fl_filter *fnew,
1505 struct cls_fl_filter *fold,
1506 bool *in_ht)
1507 {
1508 struct fl_flow_mask *mask = fnew->mask;
1509 int err;
1510
1511 err = rhashtable_lookup_insert_fast(&mask->ht,
1512 &fnew->ht_node,
1513 mask->filter_ht_params);
1514 if (err) {
1515 *in_ht = false;
1516 /* It is okay if filter with same key exists when
1517 * overwriting.
1518 */
1519 return fold && err == -EEXIST ? 0 : err;
1520 }
1521
1522 *in_ht = true;
1523 return 0;
1524 }
1525
fl_change(struct net * net,struct sk_buff * in_skb,struct tcf_proto * tp,unsigned long base,u32 handle,struct nlattr ** tca,void ** arg,bool ovr,bool rtnl_held,struct netlink_ext_ack * extack)1526 static int fl_change(struct net *net, struct sk_buff *in_skb,
1527 struct tcf_proto *tp, unsigned long base,
1528 u32 handle, struct nlattr **tca,
1529 void **arg, bool ovr, bool rtnl_held,
1530 struct netlink_ext_ack *extack)
1531 {
1532 struct cls_fl_head *head = fl_head_dereference(tp);
1533 struct cls_fl_filter *fold = *arg;
1534 struct cls_fl_filter *fnew;
1535 struct fl_flow_mask *mask;
1536 struct nlattr **tb;
1537 bool in_ht;
1538 int err;
1539
1540 if (!tca[TCA_OPTIONS]) {
1541 err = -EINVAL;
1542 goto errout_fold;
1543 }
1544
1545 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL);
1546 if (!mask) {
1547 err = -ENOBUFS;
1548 goto errout_fold;
1549 }
1550
1551 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1552 if (!tb) {
1553 err = -ENOBUFS;
1554 goto errout_mask_alloc;
1555 }
1556
1557 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
1558 tca[TCA_OPTIONS], fl_policy, NULL);
1559 if (err < 0)
1560 goto errout_tb;
1561
1562 if (fold && handle && fold->handle != handle) {
1563 err = -EINVAL;
1564 goto errout_tb;
1565 }
1566
1567 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
1568 if (!fnew) {
1569 err = -ENOBUFS;
1570 goto errout_tb;
1571 }
1572 INIT_LIST_HEAD(&fnew->hw_list);
1573 refcount_set(&fnew->refcnt, 1);
1574
1575 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0);
1576 if (err < 0)
1577 goto errout;
1578
1579 if (tb[TCA_FLOWER_FLAGS]) {
1580 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
1581
1582 if (!tc_flags_valid(fnew->flags)) {
1583 err = -EINVAL;
1584 goto errout;
1585 }
1586 }
1587
1588 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr,
1589 tp->chain->tmplt_priv, rtnl_held, extack);
1590 if (err)
1591 goto errout;
1592
1593 err = fl_check_assign_mask(head, fnew, fold, mask);
1594 if (err)
1595 goto errout;
1596
1597 err = fl_ht_insert_unique(fnew, fold, &in_ht);
1598 if (err)
1599 goto errout_mask;
1600
1601 if (!tc_skip_hw(fnew->flags)) {
1602 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack);
1603 if (err)
1604 goto errout_ht;
1605 }
1606
1607 if (!tc_in_hw(fnew->flags))
1608 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
1609
1610 spin_lock(&tp->lock);
1611
1612 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup
1613 * proto again or create new one, if necessary.
1614 */
1615 if (tp->deleting) {
1616 err = -EAGAIN;
1617 goto errout_hw;
1618 }
1619
1620 if (fold) {
1621 /* Fold filter was deleted concurrently. Retry lookup. */
1622 if (fold->deleted) {
1623 err = -EAGAIN;
1624 goto errout_hw;
1625 }
1626
1627 fnew->handle = handle;
1628
1629 if (!in_ht) {
1630 struct rhashtable_params params =
1631 fnew->mask->filter_ht_params;
1632
1633 err = rhashtable_insert_fast(&fnew->mask->ht,
1634 &fnew->ht_node,
1635 params);
1636 if (err)
1637 goto errout_hw;
1638 in_ht = true;
1639 }
1640
1641 refcount_inc(&fnew->refcnt);
1642 rhashtable_remove_fast(&fold->mask->ht,
1643 &fold->ht_node,
1644 fold->mask->filter_ht_params);
1645 idr_replace(&head->handle_idr, fnew, fnew->handle);
1646 list_replace_rcu(&fold->list, &fnew->list);
1647 fold->deleted = true;
1648
1649 spin_unlock(&tp->lock);
1650
1651 fl_mask_put(head, fold->mask);
1652 if (!tc_skip_hw(fold->flags))
1653 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL);
1654 tcf_unbind_filter(tp, &fold->res);
1655 /* Caller holds reference to fold, so refcnt is always > 0
1656 * after this.
1657 */
1658 refcount_dec(&fold->refcnt);
1659 __fl_put(fold);
1660 } else {
1661 if (handle) {
1662 /* user specifies a handle and it doesn't exist */
1663 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1664 handle, GFP_ATOMIC);
1665
1666 /* Filter with specified handle was concurrently
1667 * inserted after initial check in cls_api. This is not
1668 * necessarily an error if NLM_F_EXCL is not set in
1669 * message flags. Returning EAGAIN will cause cls_api to
1670 * try to update concurrently inserted rule.
1671 */
1672 if (err == -ENOSPC)
1673 err = -EAGAIN;
1674 } else {
1675 handle = 1;
1676 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1677 INT_MAX, GFP_ATOMIC);
1678 }
1679 if (err)
1680 goto errout_hw;
1681
1682 refcount_inc(&fnew->refcnt);
1683 fnew->handle = handle;
1684 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
1685 spin_unlock(&tp->lock);
1686 }
1687
1688 *arg = fnew;
1689
1690 kfree(tb);
1691 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
1692 return 0;
1693
1694 errout_ht:
1695 spin_lock(&tp->lock);
1696 errout_hw:
1697 fnew->deleted = true;
1698 spin_unlock(&tp->lock);
1699 if (!tc_skip_hw(fnew->flags))
1700 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL);
1701 if (in_ht)
1702 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node,
1703 fnew->mask->filter_ht_params);
1704 errout_mask:
1705 fl_mask_put(head, fnew->mask);
1706 errout:
1707 __fl_put(fnew);
1708 errout_tb:
1709 kfree(tb);
1710 errout_mask_alloc:
1711 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
1712 errout_fold:
1713 if (fold)
1714 __fl_put(fold);
1715 return err;
1716 }
1717
fl_delete(struct tcf_proto * tp,void * arg,bool * last,bool rtnl_held,struct netlink_ext_ack * extack)1718 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
1719 bool rtnl_held, struct netlink_ext_ack *extack)
1720 {
1721 struct cls_fl_head *head = fl_head_dereference(tp);
1722 struct cls_fl_filter *f = arg;
1723 bool last_on_mask;
1724 int err = 0;
1725
1726 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack);
1727 *last = list_empty(&head->masks);
1728 __fl_put(f);
1729
1730 return err;
1731 }
1732
fl_walk(struct tcf_proto * tp,struct tcf_walker * arg,bool rtnl_held)1733 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg,
1734 bool rtnl_held)
1735 {
1736 struct cls_fl_head *head = fl_head_dereference(tp);
1737 unsigned long id = arg->cookie, tmp;
1738 struct cls_fl_filter *f;
1739
1740 arg->count = arg->skip;
1741
1742 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) {
1743 /* don't return filters that are being deleted */
1744 if (!refcount_inc_not_zero(&f->refcnt))
1745 continue;
1746 if (arg->fn(tp, f, arg) < 0) {
1747 __fl_put(f);
1748 arg->stop = 1;
1749 break;
1750 }
1751 __fl_put(f);
1752 arg->count++;
1753 }
1754 arg->cookie = id;
1755 }
1756
1757 static struct cls_fl_filter *
fl_get_next_hw_filter(struct tcf_proto * tp,struct cls_fl_filter * f,bool add)1758 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add)
1759 {
1760 struct cls_fl_head *head = fl_head_dereference(tp);
1761
1762 spin_lock(&tp->lock);
1763 if (list_empty(&head->hw_filters)) {
1764 spin_unlock(&tp->lock);
1765 return NULL;
1766 }
1767
1768 if (!f)
1769 f = list_entry(&head->hw_filters, struct cls_fl_filter,
1770 hw_list);
1771 list_for_each_entry_continue(f, &head->hw_filters, hw_list) {
1772 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) {
1773 spin_unlock(&tp->lock);
1774 return f;
1775 }
1776 }
1777
1778 spin_unlock(&tp->lock);
1779 return NULL;
1780 }
1781
fl_reoffload(struct tcf_proto * tp,bool add,flow_setup_cb_t * cb,void * cb_priv,struct netlink_ext_ack * extack)1782 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb,
1783 void *cb_priv, struct netlink_ext_ack *extack)
1784 {
1785 struct tcf_block *block = tp->chain->block;
1786 struct flow_cls_offload cls_flower = {};
1787 struct cls_fl_filter *f = NULL;
1788 int err;
1789
1790 /* hw_filters list can only be changed by hw offload functions after
1791 * obtaining rtnl lock. Make sure it is not changed while reoffload is
1792 * iterating it.
1793 */
1794 ASSERT_RTNL();
1795
1796 while ((f = fl_get_next_hw_filter(tp, f, add))) {
1797 cls_flower.rule =
1798 flow_rule_alloc(tcf_exts_num_actions(&f->exts));
1799 if (!cls_flower.rule) {
1800 __fl_put(f);
1801 return -ENOMEM;
1802 }
1803
1804 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags,
1805 extack);
1806 cls_flower.command = add ?
1807 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY;
1808 cls_flower.cookie = (unsigned long)f;
1809 cls_flower.rule->match.dissector = &f->mask->dissector;
1810 cls_flower.rule->match.mask = &f->mask->key;
1811 cls_flower.rule->match.key = &f->mkey;
1812
1813 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts,
1814 true);
1815 if (err) {
1816 kfree(cls_flower.rule);
1817 if (tc_skip_sw(f->flags)) {
1818 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
1819 __fl_put(f);
1820 return err;
1821 }
1822 goto next_flow;
1823 }
1824
1825 cls_flower.classid = f->res.classid;
1826
1827 err = tc_setup_cb_reoffload(block, tp, add, cb,
1828 TC_SETUP_CLSFLOWER, &cls_flower,
1829 cb_priv, &f->flags,
1830 &f->in_hw_count);
1831 tc_cleanup_flow_action(&cls_flower.rule->action);
1832 kfree(cls_flower.rule);
1833
1834 if (err) {
1835 __fl_put(f);
1836 return err;
1837 }
1838 next_flow:
1839 __fl_put(f);
1840 }
1841
1842 return 0;
1843 }
1844
fl_hw_add(struct tcf_proto * tp,void * type_data)1845 static void fl_hw_add(struct tcf_proto *tp, void *type_data)
1846 {
1847 struct flow_cls_offload *cls_flower = type_data;
1848 struct cls_fl_filter *f =
1849 (struct cls_fl_filter *) cls_flower->cookie;
1850 struct cls_fl_head *head = fl_head_dereference(tp);
1851
1852 spin_lock(&tp->lock);
1853 list_add(&f->hw_list, &head->hw_filters);
1854 spin_unlock(&tp->lock);
1855 }
1856
fl_hw_del(struct tcf_proto * tp,void * type_data)1857 static void fl_hw_del(struct tcf_proto *tp, void *type_data)
1858 {
1859 struct flow_cls_offload *cls_flower = type_data;
1860 struct cls_fl_filter *f =
1861 (struct cls_fl_filter *) cls_flower->cookie;
1862
1863 spin_lock(&tp->lock);
1864 if (!list_empty(&f->hw_list))
1865 list_del_init(&f->hw_list);
1866 spin_unlock(&tp->lock);
1867 }
1868
fl_hw_create_tmplt(struct tcf_chain * chain,struct fl_flow_tmplt * tmplt)1869 static int fl_hw_create_tmplt(struct tcf_chain *chain,
1870 struct fl_flow_tmplt *tmplt)
1871 {
1872 struct flow_cls_offload cls_flower = {};
1873 struct tcf_block *block = chain->block;
1874
1875 cls_flower.rule = flow_rule_alloc(0);
1876 if (!cls_flower.rule)
1877 return -ENOMEM;
1878
1879 cls_flower.common.chain_index = chain->index;
1880 cls_flower.command = FLOW_CLS_TMPLT_CREATE;
1881 cls_flower.cookie = (unsigned long) tmplt;
1882 cls_flower.rule->match.dissector = &tmplt->dissector;
1883 cls_flower.rule->match.mask = &tmplt->mask;
1884 cls_flower.rule->match.key = &tmplt->dummy_key;
1885
1886 /* We don't care if driver (any of them) fails to handle this
1887 * call. It serves just as a hint for it.
1888 */
1889 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
1890 kfree(cls_flower.rule);
1891
1892 return 0;
1893 }
1894
fl_hw_destroy_tmplt(struct tcf_chain * chain,struct fl_flow_tmplt * tmplt)1895 static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
1896 struct fl_flow_tmplt *tmplt)
1897 {
1898 struct flow_cls_offload cls_flower = {};
1899 struct tcf_block *block = chain->block;
1900
1901 cls_flower.common.chain_index = chain->index;
1902 cls_flower.command = FLOW_CLS_TMPLT_DESTROY;
1903 cls_flower.cookie = (unsigned long) tmplt;
1904
1905 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
1906 }
1907
fl_tmplt_create(struct net * net,struct tcf_chain * chain,struct nlattr ** tca,struct netlink_ext_ack * extack)1908 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
1909 struct nlattr **tca,
1910 struct netlink_ext_ack *extack)
1911 {
1912 struct fl_flow_tmplt *tmplt;
1913 struct nlattr **tb;
1914 int err;
1915
1916 if (!tca[TCA_OPTIONS])
1917 return ERR_PTR(-EINVAL);
1918
1919 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1920 if (!tb)
1921 return ERR_PTR(-ENOBUFS);
1922 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
1923 tca[TCA_OPTIONS], fl_policy, NULL);
1924 if (err)
1925 goto errout_tb;
1926
1927 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
1928 if (!tmplt) {
1929 err = -ENOMEM;
1930 goto errout_tb;
1931 }
1932 tmplt->chain = chain;
1933 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
1934 if (err)
1935 goto errout_tmplt;
1936
1937 fl_init_dissector(&tmplt->dissector, &tmplt->mask);
1938
1939 err = fl_hw_create_tmplt(chain, tmplt);
1940 if (err)
1941 goto errout_tmplt;
1942
1943 kfree(tb);
1944 return tmplt;
1945
1946 errout_tmplt:
1947 kfree(tmplt);
1948 errout_tb:
1949 kfree(tb);
1950 return ERR_PTR(err);
1951 }
1952
fl_tmplt_destroy(void * tmplt_priv)1953 static void fl_tmplt_destroy(void *tmplt_priv)
1954 {
1955 struct fl_flow_tmplt *tmplt = tmplt_priv;
1956
1957 fl_hw_destroy_tmplt(tmplt->chain, tmplt);
1958 kfree(tmplt);
1959 }
1960
fl_dump_key_val(struct sk_buff * skb,void * val,int val_type,void * mask,int mask_type,int len)1961 static int fl_dump_key_val(struct sk_buff *skb,
1962 void *val, int val_type,
1963 void *mask, int mask_type, int len)
1964 {
1965 int err;
1966
1967 if (!memchr_inv(mask, 0, len))
1968 return 0;
1969 err = nla_put(skb, val_type, len, val);
1970 if (err)
1971 return err;
1972 if (mask_type != TCA_FLOWER_UNSPEC) {
1973 err = nla_put(skb, mask_type, len, mask);
1974 if (err)
1975 return err;
1976 }
1977 return 0;
1978 }
1979
fl_dump_key_port_range(struct sk_buff * skb,struct fl_flow_key * key,struct fl_flow_key * mask)1980 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key,
1981 struct fl_flow_key *mask)
1982 {
1983 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst,
1984 TCA_FLOWER_KEY_PORT_DST_MIN,
1985 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC,
1986 sizeof(key->tp_range.tp_min.dst)) ||
1987 fl_dump_key_val(skb, &key->tp_range.tp_max.dst,
1988 TCA_FLOWER_KEY_PORT_DST_MAX,
1989 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC,
1990 sizeof(key->tp_range.tp_max.dst)) ||
1991 fl_dump_key_val(skb, &key->tp_range.tp_min.src,
1992 TCA_FLOWER_KEY_PORT_SRC_MIN,
1993 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC,
1994 sizeof(key->tp_range.tp_min.src)) ||
1995 fl_dump_key_val(skb, &key->tp_range.tp_max.src,
1996 TCA_FLOWER_KEY_PORT_SRC_MAX,
1997 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC,
1998 sizeof(key->tp_range.tp_max.src)))
1999 return -1;
2000
2001 return 0;
2002 }
2003
fl_dump_key_mpls(struct sk_buff * skb,struct flow_dissector_key_mpls * mpls_key,struct flow_dissector_key_mpls * mpls_mask)2004 static int fl_dump_key_mpls(struct sk_buff *skb,
2005 struct flow_dissector_key_mpls *mpls_key,
2006 struct flow_dissector_key_mpls *mpls_mask)
2007 {
2008 int err;
2009
2010 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
2011 return 0;
2012 if (mpls_mask->mpls_ttl) {
2013 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
2014 mpls_key->mpls_ttl);
2015 if (err)
2016 return err;
2017 }
2018 if (mpls_mask->mpls_tc) {
2019 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
2020 mpls_key->mpls_tc);
2021 if (err)
2022 return err;
2023 }
2024 if (mpls_mask->mpls_label) {
2025 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
2026 mpls_key->mpls_label);
2027 if (err)
2028 return err;
2029 }
2030 if (mpls_mask->mpls_bos) {
2031 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
2032 mpls_key->mpls_bos);
2033 if (err)
2034 return err;
2035 }
2036 return 0;
2037 }
2038
fl_dump_key_ip(struct sk_buff * skb,bool encap,struct flow_dissector_key_ip * key,struct flow_dissector_key_ip * mask)2039 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
2040 struct flow_dissector_key_ip *key,
2041 struct flow_dissector_key_ip *mask)
2042 {
2043 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
2044 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
2045 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
2046 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
2047
2048 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
2049 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
2050 return -1;
2051
2052 return 0;
2053 }
2054
fl_dump_key_vlan(struct sk_buff * skb,int vlan_id_key,int vlan_prio_key,struct flow_dissector_key_vlan * vlan_key,struct flow_dissector_key_vlan * vlan_mask)2055 static int fl_dump_key_vlan(struct sk_buff *skb,
2056 int vlan_id_key, int vlan_prio_key,
2057 struct flow_dissector_key_vlan *vlan_key,
2058 struct flow_dissector_key_vlan *vlan_mask)
2059 {
2060 int err;
2061
2062 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
2063 return 0;
2064 if (vlan_mask->vlan_id) {
2065 err = nla_put_u16(skb, vlan_id_key,
2066 vlan_key->vlan_id);
2067 if (err)
2068 return err;
2069 }
2070 if (vlan_mask->vlan_priority) {
2071 err = nla_put_u8(skb, vlan_prio_key,
2072 vlan_key->vlan_priority);
2073 if (err)
2074 return err;
2075 }
2076 return 0;
2077 }
2078
fl_get_key_flag(u32 dissector_key,u32 dissector_mask,u32 * flower_key,u32 * flower_mask,u32 flower_flag_bit,u32 dissector_flag_bit)2079 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
2080 u32 *flower_key, u32 *flower_mask,
2081 u32 flower_flag_bit, u32 dissector_flag_bit)
2082 {
2083 if (dissector_mask & dissector_flag_bit) {
2084 *flower_mask |= flower_flag_bit;
2085 if (dissector_key & dissector_flag_bit)
2086 *flower_key |= flower_flag_bit;
2087 }
2088 }
2089
fl_dump_key_flags(struct sk_buff * skb,u32 flags_key,u32 flags_mask)2090 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
2091 {
2092 u32 key, mask;
2093 __be32 _key, _mask;
2094 int err;
2095
2096 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
2097 return 0;
2098
2099 key = 0;
2100 mask = 0;
2101
2102 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2103 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
2104 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2105 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
2106 FLOW_DIS_FIRST_FRAG);
2107
2108 _key = cpu_to_be32(key);
2109 _mask = cpu_to_be32(mask);
2110
2111 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
2112 if (err)
2113 return err;
2114
2115 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
2116 }
2117
fl_dump_key_geneve_opt(struct sk_buff * skb,struct flow_dissector_key_enc_opts * enc_opts)2118 static int fl_dump_key_geneve_opt(struct sk_buff *skb,
2119 struct flow_dissector_key_enc_opts *enc_opts)
2120 {
2121 struct geneve_opt *opt;
2122 struct nlattr *nest;
2123 int opt_off = 0;
2124
2125 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
2126 if (!nest)
2127 goto nla_put_failure;
2128
2129 while (enc_opts->len > opt_off) {
2130 opt = (struct geneve_opt *)&enc_opts->data[opt_off];
2131
2132 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
2133 opt->opt_class))
2134 goto nla_put_failure;
2135 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
2136 opt->type))
2137 goto nla_put_failure;
2138 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
2139 opt->length * 4, opt->opt_data))
2140 goto nla_put_failure;
2141
2142 opt_off += sizeof(struct geneve_opt) + opt->length * 4;
2143 }
2144 nla_nest_end(skb, nest);
2145 return 0;
2146
2147 nla_put_failure:
2148 nla_nest_cancel(skb, nest);
2149 return -EMSGSIZE;
2150 }
2151
fl_dump_key_ct(struct sk_buff * skb,struct flow_dissector_key_ct * key,struct flow_dissector_key_ct * mask)2152 static int fl_dump_key_ct(struct sk_buff *skb,
2153 struct flow_dissector_key_ct *key,
2154 struct flow_dissector_key_ct *mask)
2155 {
2156 if (IS_ENABLED(CONFIG_NF_CONNTRACK) &&
2157 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
2158 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
2159 sizeof(key->ct_state)))
2160 goto nla_put_failure;
2161
2162 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
2163 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
2164 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
2165 sizeof(key->ct_zone)))
2166 goto nla_put_failure;
2167
2168 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
2169 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
2170 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
2171 sizeof(key->ct_mark)))
2172 goto nla_put_failure;
2173
2174 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
2175 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
2176 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
2177 sizeof(key->ct_labels)))
2178 goto nla_put_failure;
2179
2180 return 0;
2181
2182 nla_put_failure:
2183 return -EMSGSIZE;
2184 }
2185
fl_dump_key_options(struct sk_buff * skb,int enc_opt_type,struct flow_dissector_key_enc_opts * enc_opts)2186 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
2187 struct flow_dissector_key_enc_opts *enc_opts)
2188 {
2189 struct nlattr *nest;
2190 int err;
2191
2192 if (!enc_opts->len)
2193 return 0;
2194
2195 nest = nla_nest_start_noflag(skb, enc_opt_type);
2196 if (!nest)
2197 goto nla_put_failure;
2198
2199 switch (enc_opts->dst_opt_type) {
2200 case TUNNEL_GENEVE_OPT:
2201 err = fl_dump_key_geneve_opt(skb, enc_opts);
2202 if (err)
2203 goto nla_put_failure;
2204 break;
2205 default:
2206 goto nla_put_failure;
2207 }
2208 nla_nest_end(skb, nest);
2209 return 0;
2210
2211 nla_put_failure:
2212 nla_nest_cancel(skb, nest);
2213 return -EMSGSIZE;
2214 }
2215
fl_dump_key_enc_opt(struct sk_buff * skb,struct flow_dissector_key_enc_opts * key_opts,struct flow_dissector_key_enc_opts * msk_opts)2216 static int fl_dump_key_enc_opt(struct sk_buff *skb,
2217 struct flow_dissector_key_enc_opts *key_opts,
2218 struct flow_dissector_key_enc_opts *msk_opts)
2219 {
2220 int err;
2221
2222 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
2223 if (err)
2224 return err;
2225
2226 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
2227 }
2228
fl_dump_key(struct sk_buff * skb,struct net * net,struct fl_flow_key * key,struct fl_flow_key * mask)2229 static int fl_dump_key(struct sk_buff *skb, struct net *net,
2230 struct fl_flow_key *key, struct fl_flow_key *mask)
2231 {
2232 if (mask->meta.ingress_ifindex) {
2233 struct net_device *dev;
2234
2235 dev = __dev_get_by_index(net, key->meta.ingress_ifindex);
2236 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
2237 goto nla_put_failure;
2238 }
2239
2240 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
2241 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
2242 sizeof(key->eth.dst)) ||
2243 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
2244 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
2245 sizeof(key->eth.src)) ||
2246 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
2247 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
2248 sizeof(key->basic.n_proto)))
2249 goto nla_put_failure;
2250
2251 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
2252 goto nla_put_failure;
2253
2254 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
2255 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
2256 goto nla_put_failure;
2257
2258 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
2259 TCA_FLOWER_KEY_CVLAN_PRIO,
2260 &key->cvlan, &mask->cvlan) ||
2261 (mask->cvlan.vlan_tpid &&
2262 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
2263 key->cvlan.vlan_tpid)))
2264 goto nla_put_failure;
2265
2266 if (mask->basic.n_proto) {
2267 if (mask->cvlan.vlan_tpid) {
2268 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
2269 key->basic.n_proto))
2270 goto nla_put_failure;
2271 } else if (mask->vlan.vlan_tpid) {
2272 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
2273 key->basic.n_proto))
2274 goto nla_put_failure;
2275 }
2276 }
2277
2278 if ((key->basic.n_proto == htons(ETH_P_IP) ||
2279 key->basic.n_proto == htons(ETH_P_IPV6)) &&
2280 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
2281 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
2282 sizeof(key->basic.ip_proto)) ||
2283 fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
2284 goto nla_put_failure;
2285
2286 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
2287 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
2288 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
2289 sizeof(key->ipv4.src)) ||
2290 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
2291 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
2292 sizeof(key->ipv4.dst))))
2293 goto nla_put_failure;
2294 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
2295 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
2296 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
2297 sizeof(key->ipv6.src)) ||
2298 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
2299 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
2300 sizeof(key->ipv6.dst))))
2301 goto nla_put_failure;
2302
2303 if (key->basic.ip_proto == IPPROTO_TCP &&
2304 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
2305 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
2306 sizeof(key->tp.src)) ||
2307 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
2308 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
2309 sizeof(key->tp.dst)) ||
2310 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
2311 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
2312 sizeof(key->tcp.flags))))
2313 goto nla_put_failure;
2314 else if (key->basic.ip_proto == IPPROTO_UDP &&
2315 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
2316 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
2317 sizeof(key->tp.src)) ||
2318 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
2319 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
2320 sizeof(key->tp.dst))))
2321 goto nla_put_failure;
2322 else if (key->basic.ip_proto == IPPROTO_SCTP &&
2323 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
2324 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
2325 sizeof(key->tp.src)) ||
2326 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
2327 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
2328 sizeof(key->tp.dst))))
2329 goto nla_put_failure;
2330 else if (key->basic.n_proto == htons(ETH_P_IP) &&
2331 key->basic.ip_proto == IPPROTO_ICMP &&
2332 (fl_dump_key_val(skb, &key->icmp.type,
2333 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
2334 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
2335 sizeof(key->icmp.type)) ||
2336 fl_dump_key_val(skb, &key->icmp.code,
2337 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
2338 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
2339 sizeof(key->icmp.code))))
2340 goto nla_put_failure;
2341 else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
2342 key->basic.ip_proto == IPPROTO_ICMPV6 &&
2343 (fl_dump_key_val(skb, &key->icmp.type,
2344 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
2345 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
2346 sizeof(key->icmp.type)) ||
2347 fl_dump_key_val(skb, &key->icmp.code,
2348 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
2349 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
2350 sizeof(key->icmp.code))))
2351 goto nla_put_failure;
2352 else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
2353 key->basic.n_proto == htons(ETH_P_RARP)) &&
2354 (fl_dump_key_val(skb, &key->arp.sip,
2355 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
2356 TCA_FLOWER_KEY_ARP_SIP_MASK,
2357 sizeof(key->arp.sip)) ||
2358 fl_dump_key_val(skb, &key->arp.tip,
2359 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
2360 TCA_FLOWER_KEY_ARP_TIP_MASK,
2361 sizeof(key->arp.tip)) ||
2362 fl_dump_key_val(skb, &key->arp.op,
2363 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
2364 TCA_FLOWER_KEY_ARP_OP_MASK,
2365 sizeof(key->arp.op)) ||
2366 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
2367 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
2368 sizeof(key->arp.sha)) ||
2369 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
2370 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
2371 sizeof(key->arp.tha))))
2372 goto nla_put_failure;
2373
2374 if ((key->basic.ip_proto == IPPROTO_TCP ||
2375 key->basic.ip_proto == IPPROTO_UDP ||
2376 key->basic.ip_proto == IPPROTO_SCTP) &&
2377 fl_dump_key_port_range(skb, key, mask))
2378 goto nla_put_failure;
2379
2380 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
2381 (fl_dump_key_val(skb, &key->enc_ipv4.src,
2382 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
2383 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
2384 sizeof(key->enc_ipv4.src)) ||
2385 fl_dump_key_val(skb, &key->enc_ipv4.dst,
2386 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
2387 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
2388 sizeof(key->enc_ipv4.dst))))
2389 goto nla_put_failure;
2390 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
2391 (fl_dump_key_val(skb, &key->enc_ipv6.src,
2392 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
2393 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
2394 sizeof(key->enc_ipv6.src)) ||
2395 fl_dump_key_val(skb, &key->enc_ipv6.dst,
2396 TCA_FLOWER_KEY_ENC_IPV6_DST,
2397 &mask->enc_ipv6.dst,
2398 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
2399 sizeof(key->enc_ipv6.dst))))
2400 goto nla_put_failure;
2401
2402 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
2403 &mask->enc_key_id, TCA_FLOWER_UNSPEC,
2404 sizeof(key->enc_key_id)) ||
2405 fl_dump_key_val(skb, &key->enc_tp.src,
2406 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
2407 &mask->enc_tp.src,
2408 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
2409 sizeof(key->enc_tp.src)) ||
2410 fl_dump_key_val(skb, &key->enc_tp.dst,
2411 TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
2412 &mask->enc_tp.dst,
2413 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
2414 sizeof(key->enc_tp.dst)) ||
2415 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
2416 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
2417 goto nla_put_failure;
2418
2419 if (fl_dump_key_ct(skb, &key->ct, &mask->ct))
2420 goto nla_put_failure;
2421
2422 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
2423 goto nla_put_failure;
2424
2425 return 0;
2426
2427 nla_put_failure:
2428 return -EMSGSIZE;
2429 }
2430
fl_dump(struct net * net,struct tcf_proto * tp,void * fh,struct sk_buff * skb,struct tcmsg * t,bool rtnl_held)2431 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
2432 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
2433 {
2434 struct cls_fl_filter *f = fh;
2435 struct nlattr *nest;
2436 struct fl_flow_key *key, *mask;
2437 bool skip_hw;
2438
2439 if (!f)
2440 return skb->len;
2441
2442 t->tcm_handle = f->handle;
2443
2444 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
2445 if (!nest)
2446 goto nla_put_failure;
2447
2448 spin_lock(&tp->lock);
2449
2450 if (f->res.classid &&
2451 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
2452 goto nla_put_failure_locked;
2453
2454 key = &f->key;
2455 mask = &f->mask->key;
2456 skip_hw = tc_skip_hw(f->flags);
2457
2458 if (fl_dump_key(skb, net, key, mask))
2459 goto nla_put_failure_locked;
2460
2461 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
2462 goto nla_put_failure_locked;
2463
2464 spin_unlock(&tp->lock);
2465
2466 if (!skip_hw)
2467 fl_hw_update_stats(tp, f, rtnl_held);
2468
2469 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count))
2470 goto nla_put_failure;
2471
2472 if (tcf_exts_dump(skb, &f->exts))
2473 goto nla_put_failure;
2474
2475 nla_nest_end(skb, nest);
2476
2477 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
2478 goto nla_put_failure;
2479
2480 return skb->len;
2481
2482 nla_put_failure_locked:
2483 spin_unlock(&tp->lock);
2484 nla_put_failure:
2485 nla_nest_cancel(skb, nest);
2486 return -1;
2487 }
2488
fl_tmplt_dump(struct sk_buff * skb,struct net * net,void * tmplt_priv)2489 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
2490 {
2491 struct fl_flow_tmplt *tmplt = tmplt_priv;
2492 struct fl_flow_key *key, *mask;
2493 struct nlattr *nest;
2494
2495 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
2496 if (!nest)
2497 goto nla_put_failure;
2498
2499 key = &tmplt->dummy_key;
2500 mask = &tmplt->mask;
2501
2502 if (fl_dump_key(skb, net, key, mask))
2503 goto nla_put_failure;
2504
2505 nla_nest_end(skb, nest);
2506
2507 return skb->len;
2508
2509 nla_put_failure:
2510 nla_nest_cancel(skb, nest);
2511 return -EMSGSIZE;
2512 }
2513
fl_bind_class(void * fh,u32 classid,unsigned long cl,void * q,unsigned long base)2514 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q,
2515 unsigned long base)
2516 {
2517 struct cls_fl_filter *f = fh;
2518
2519 if (f && f->res.classid == classid) {
2520 if (cl)
2521 __tcf_bind_filter(q, &f->res, base);
2522 else
2523 __tcf_unbind_filter(q, &f->res);
2524 }
2525 }
2526
fl_delete_empty(struct tcf_proto * tp)2527 static bool fl_delete_empty(struct tcf_proto *tp)
2528 {
2529 struct cls_fl_head *head = fl_head_dereference(tp);
2530
2531 spin_lock(&tp->lock);
2532 tp->deleting = idr_is_empty(&head->handle_idr);
2533 spin_unlock(&tp->lock);
2534
2535 return tp->deleting;
2536 }
2537
2538 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
2539 .kind = "flower",
2540 .classify = fl_classify,
2541 .init = fl_init,
2542 .destroy = fl_destroy,
2543 .get = fl_get,
2544 .put = fl_put,
2545 .change = fl_change,
2546 .delete = fl_delete,
2547 .delete_empty = fl_delete_empty,
2548 .walk = fl_walk,
2549 .reoffload = fl_reoffload,
2550 .hw_add = fl_hw_add,
2551 .hw_del = fl_hw_del,
2552 .dump = fl_dump,
2553 .bind_class = fl_bind_class,
2554 .tmplt_create = fl_tmplt_create,
2555 .tmplt_destroy = fl_tmplt_destroy,
2556 .tmplt_dump = fl_tmplt_dump,
2557 .owner = THIS_MODULE,
2558 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED,
2559 };
2560
cls_fl_init(void)2561 static int __init cls_fl_init(void)
2562 {
2563 return register_tcf_proto_ops(&cls_fl_ops);
2564 }
2565
cls_fl_exit(void)2566 static void __exit cls_fl_exit(void)
2567 {
2568 unregister_tcf_proto_ops(&cls_fl_ops);
2569 }
2570
2571 module_init(cls_fl_init);
2572 module_exit(cls_fl_exit);
2573
2574 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
2575 MODULE_DESCRIPTION("Flower classifier");
2576 MODULE_LICENSE("GPL v2");
2577