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 #include <net/vxlan.h>
26 #include <net/erspan.h>
27
28 #include <net/dst.h>
29 #include <net/dst_metadata.h>
30
31 #include <uapi/linux/netfilter/nf_conntrack_common.h>
32
33 #define TCA_FLOWER_KEY_CT_FLAGS_MAX \
34 ((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1)
35 #define TCA_FLOWER_KEY_CT_FLAGS_MASK \
36 (TCA_FLOWER_KEY_CT_FLAGS_MAX - 1)
37
38 struct fl_flow_key {
39 struct flow_dissector_key_meta meta;
40 struct flow_dissector_key_control control;
41 struct flow_dissector_key_control enc_control;
42 struct flow_dissector_key_basic basic;
43 struct flow_dissector_key_eth_addrs eth;
44 struct flow_dissector_key_vlan vlan;
45 struct flow_dissector_key_vlan cvlan;
46 union {
47 struct flow_dissector_key_ipv4_addrs ipv4;
48 struct flow_dissector_key_ipv6_addrs ipv6;
49 };
50 struct flow_dissector_key_ports tp;
51 struct flow_dissector_key_icmp icmp;
52 struct flow_dissector_key_arp arp;
53 struct flow_dissector_key_keyid enc_key_id;
54 union {
55 struct flow_dissector_key_ipv4_addrs enc_ipv4;
56 struct flow_dissector_key_ipv6_addrs enc_ipv6;
57 };
58 struct flow_dissector_key_ports enc_tp;
59 struct flow_dissector_key_mpls mpls;
60 struct flow_dissector_key_tcp tcp;
61 struct flow_dissector_key_ip ip;
62 struct flow_dissector_key_ip enc_ip;
63 struct flow_dissector_key_enc_opts enc_opts;
64 union {
65 struct flow_dissector_key_ports tp;
66 struct {
67 struct flow_dissector_key_ports tp_min;
68 struct flow_dissector_key_ports tp_max;
69 };
70 } tp_range;
71 struct flow_dissector_key_ct ct;
72 struct flow_dissector_key_hash hash;
73 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
74
75 struct fl_flow_mask_range {
76 unsigned short int start;
77 unsigned short int end;
78 };
79
80 struct fl_flow_mask {
81 struct fl_flow_key key;
82 struct fl_flow_mask_range range;
83 u32 flags;
84 struct rhash_head ht_node;
85 struct rhashtable ht;
86 struct rhashtable_params filter_ht_params;
87 struct flow_dissector dissector;
88 struct list_head filters;
89 struct rcu_work rwork;
90 struct list_head list;
91 refcount_t refcnt;
92 };
93
94 struct fl_flow_tmplt {
95 struct fl_flow_key dummy_key;
96 struct fl_flow_key mask;
97 struct flow_dissector dissector;
98 struct tcf_chain *chain;
99 };
100
101 struct cls_fl_head {
102 struct rhashtable ht;
103 spinlock_t masks_lock; /* Protect masks list */
104 struct list_head masks;
105 struct list_head hw_filters;
106 struct rcu_work rwork;
107 struct idr handle_idr;
108 };
109
110 struct cls_fl_filter {
111 struct fl_flow_mask *mask;
112 struct rhash_head ht_node;
113 struct fl_flow_key mkey;
114 struct tcf_exts exts;
115 struct tcf_result res;
116 struct fl_flow_key key;
117 struct list_head list;
118 struct list_head hw_list;
119 u32 handle;
120 u32 flags;
121 u32 in_hw_count;
122 struct rcu_work rwork;
123 struct net_device *hw_dev;
124 /* Flower classifier is unlocked, which means that its reference counter
125 * can be changed concurrently without any kind of external
126 * synchronization. Use atomic reference counter to be concurrency-safe.
127 */
128 refcount_t refcnt;
129 bool deleted;
130 };
131
132 static const struct rhashtable_params mask_ht_params = {
133 .key_offset = offsetof(struct fl_flow_mask, key),
134 .key_len = sizeof(struct fl_flow_key),
135 .head_offset = offsetof(struct fl_flow_mask, ht_node),
136 .automatic_shrinking = true,
137 };
138
fl_mask_range(const struct fl_flow_mask * mask)139 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
140 {
141 return mask->range.end - mask->range.start;
142 }
143
fl_mask_update_range(struct fl_flow_mask * mask)144 static void fl_mask_update_range(struct fl_flow_mask *mask)
145 {
146 const u8 *bytes = (const u8 *) &mask->key;
147 size_t size = sizeof(mask->key);
148 size_t i, first = 0, last;
149
150 for (i = 0; i < size; i++) {
151 if (bytes[i]) {
152 first = i;
153 break;
154 }
155 }
156 last = first;
157 for (i = size - 1; i != first; i--) {
158 if (bytes[i]) {
159 last = i;
160 break;
161 }
162 }
163 mask->range.start = rounddown(first, sizeof(long));
164 mask->range.end = roundup(last + 1, sizeof(long));
165 }
166
fl_key_get_start(struct fl_flow_key * key,const struct fl_flow_mask * mask)167 static void *fl_key_get_start(struct fl_flow_key *key,
168 const struct fl_flow_mask *mask)
169 {
170 return (u8 *) key + mask->range.start;
171 }
172
fl_set_masked_key(struct fl_flow_key * mkey,struct fl_flow_key * key,struct fl_flow_mask * mask)173 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
174 struct fl_flow_mask *mask)
175 {
176 const long *lkey = fl_key_get_start(key, mask);
177 const long *lmask = fl_key_get_start(&mask->key, mask);
178 long *lmkey = fl_key_get_start(mkey, mask);
179 int i;
180
181 for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
182 *lmkey++ = *lkey++ & *lmask++;
183 }
184
fl_mask_fits_tmplt(struct fl_flow_tmplt * tmplt,struct fl_flow_mask * mask)185 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt,
186 struct fl_flow_mask *mask)
187 {
188 const long *lmask = fl_key_get_start(&mask->key, mask);
189 const long *ltmplt;
190 int i;
191
192 if (!tmplt)
193 return true;
194 ltmplt = fl_key_get_start(&tmplt->mask, mask);
195 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) {
196 if (~*ltmplt++ & *lmask++)
197 return false;
198 }
199 return true;
200 }
201
fl_clear_masked_range(struct fl_flow_key * key,struct fl_flow_mask * mask)202 static void fl_clear_masked_range(struct fl_flow_key *key,
203 struct fl_flow_mask *mask)
204 {
205 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
206 }
207
fl_range_port_dst_cmp(struct cls_fl_filter * filter,struct fl_flow_key * key,struct fl_flow_key * mkey)208 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter,
209 struct fl_flow_key *key,
210 struct fl_flow_key *mkey)
211 {
212 u16 min_mask, max_mask, min_val, max_val;
213
214 min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst);
215 max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst);
216 min_val = ntohs(filter->key.tp_range.tp_min.dst);
217 max_val = ntohs(filter->key.tp_range.tp_max.dst);
218
219 if (min_mask && max_mask) {
220 if (ntohs(key->tp_range.tp.dst) < min_val ||
221 ntohs(key->tp_range.tp.dst) > max_val)
222 return false;
223
224 /* skb does not have min and max values */
225 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst;
226 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst;
227 }
228 return true;
229 }
230
fl_range_port_src_cmp(struct cls_fl_filter * filter,struct fl_flow_key * key,struct fl_flow_key * mkey)231 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter,
232 struct fl_flow_key *key,
233 struct fl_flow_key *mkey)
234 {
235 u16 min_mask, max_mask, min_val, max_val;
236
237 min_mask = ntohs(filter->mask->key.tp_range.tp_min.src);
238 max_mask = ntohs(filter->mask->key.tp_range.tp_max.src);
239 min_val = ntohs(filter->key.tp_range.tp_min.src);
240 max_val = ntohs(filter->key.tp_range.tp_max.src);
241
242 if (min_mask && max_mask) {
243 if (ntohs(key->tp_range.tp.src) < min_val ||
244 ntohs(key->tp_range.tp.src) > max_val)
245 return false;
246
247 /* skb does not have min and max values */
248 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src;
249 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src;
250 }
251 return true;
252 }
253
__fl_lookup(struct fl_flow_mask * mask,struct fl_flow_key * mkey)254 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask,
255 struct fl_flow_key *mkey)
256 {
257 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask),
258 mask->filter_ht_params);
259 }
260
fl_lookup_range(struct fl_flow_mask * mask,struct fl_flow_key * mkey,struct fl_flow_key * key)261 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask,
262 struct fl_flow_key *mkey,
263 struct fl_flow_key *key)
264 {
265 struct cls_fl_filter *filter, *f;
266
267 list_for_each_entry_rcu(filter, &mask->filters, list) {
268 if (!fl_range_port_dst_cmp(filter, key, mkey))
269 continue;
270
271 if (!fl_range_port_src_cmp(filter, key, mkey))
272 continue;
273
274 f = __fl_lookup(mask, mkey);
275 if (f)
276 return f;
277 }
278 return NULL;
279 }
280
281 static noinline_for_stack
fl_mask_lookup(struct fl_flow_mask * mask,struct fl_flow_key * key)282 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key)
283 {
284 struct fl_flow_key mkey;
285
286 fl_set_masked_key(&mkey, key, mask);
287 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE))
288 return fl_lookup_range(mask, &mkey, key);
289
290 return __fl_lookup(mask, &mkey);
291 }
292
293 static u16 fl_ct_info_to_flower_map[] = {
294 [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
295 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED,
296 [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
297 TCA_FLOWER_KEY_CT_FLAGS_RELATED,
298 [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
299 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED,
300 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
301 TCA_FLOWER_KEY_CT_FLAGS_RELATED,
302 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
303 TCA_FLOWER_KEY_CT_FLAGS_NEW,
304 };
305
fl_classify(struct sk_buff * skb,const struct tcf_proto * tp,struct tcf_result * res)306 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
307 struct tcf_result *res)
308 {
309 struct cls_fl_head *head = rcu_dereference_bh(tp->root);
310 struct fl_flow_key skb_key;
311 struct fl_flow_mask *mask;
312 struct cls_fl_filter *f;
313
314 list_for_each_entry_rcu(mask, &head->masks, list) {
315 flow_dissector_init_keys(&skb_key.control, &skb_key.basic);
316 fl_clear_masked_range(&skb_key, mask);
317
318 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key);
319 /* skb_flow_dissect() does not set n_proto in case an unknown
320 * protocol, so do it rather here.
321 */
322 skb_key.basic.n_proto = skb_protocol(skb, false);
323 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key);
324 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key,
325 fl_ct_info_to_flower_map,
326 ARRAY_SIZE(fl_ct_info_to_flower_map));
327 skb_flow_dissect_hash(skb, &mask->dissector, &skb_key);
328 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0);
329
330 f = fl_mask_lookup(mask, &skb_key);
331 if (f && !tc_skip_sw(f->flags)) {
332 *res = f->res;
333 return tcf_exts_exec(skb, &f->exts, res);
334 }
335 }
336 return -1;
337 }
338
fl_init(struct tcf_proto * tp)339 static int fl_init(struct tcf_proto *tp)
340 {
341 struct cls_fl_head *head;
342
343 head = kzalloc(sizeof(*head), GFP_KERNEL);
344 if (!head)
345 return -ENOBUFS;
346
347 spin_lock_init(&head->masks_lock);
348 INIT_LIST_HEAD_RCU(&head->masks);
349 INIT_LIST_HEAD(&head->hw_filters);
350 rcu_assign_pointer(tp->root, head);
351 idr_init(&head->handle_idr);
352
353 return rhashtable_init(&head->ht, &mask_ht_params);
354 }
355
fl_mask_free(struct fl_flow_mask * mask,bool mask_init_done)356 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done)
357 {
358 /* temporary masks don't have their filters list and ht initialized */
359 if (mask_init_done) {
360 WARN_ON(!list_empty(&mask->filters));
361 rhashtable_destroy(&mask->ht);
362 }
363 kfree(mask);
364 }
365
fl_mask_free_work(struct work_struct * work)366 static void fl_mask_free_work(struct work_struct *work)
367 {
368 struct fl_flow_mask *mask = container_of(to_rcu_work(work),
369 struct fl_flow_mask, rwork);
370
371 fl_mask_free(mask, true);
372 }
373
fl_uninit_mask_free_work(struct work_struct * work)374 static void fl_uninit_mask_free_work(struct work_struct *work)
375 {
376 struct fl_flow_mask *mask = container_of(to_rcu_work(work),
377 struct fl_flow_mask, rwork);
378
379 fl_mask_free(mask, false);
380 }
381
fl_mask_put(struct cls_fl_head * head,struct fl_flow_mask * mask)382 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask)
383 {
384 if (!refcount_dec_and_test(&mask->refcnt))
385 return false;
386
387 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
388
389 spin_lock(&head->masks_lock);
390 list_del_rcu(&mask->list);
391 spin_unlock(&head->masks_lock);
392
393 tcf_queue_work(&mask->rwork, fl_mask_free_work);
394
395 return true;
396 }
397
fl_head_dereference(struct tcf_proto * tp)398 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp)
399 {
400 /* Flower classifier only changes root pointer during init and destroy.
401 * Users must obtain reference to tcf_proto instance before calling its
402 * API, so tp->root pointer is protected from concurrent call to
403 * fl_destroy() by reference counting.
404 */
405 return rcu_dereference_raw(tp->root);
406 }
407
__fl_destroy_filter(struct cls_fl_filter * f)408 static void __fl_destroy_filter(struct cls_fl_filter *f)
409 {
410 tcf_exts_destroy(&f->exts);
411 tcf_exts_put_net(&f->exts);
412 kfree(f);
413 }
414
fl_destroy_filter_work(struct work_struct * work)415 static void fl_destroy_filter_work(struct work_struct *work)
416 {
417 struct cls_fl_filter *f = container_of(to_rcu_work(work),
418 struct cls_fl_filter, rwork);
419
420 __fl_destroy_filter(f);
421 }
422
fl_hw_destroy_filter(struct tcf_proto * tp,struct cls_fl_filter * f,bool rtnl_held,struct netlink_ext_ack * extack)423 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
424 bool rtnl_held, struct netlink_ext_ack *extack)
425 {
426 struct tcf_block *block = tp->chain->block;
427 struct flow_cls_offload cls_flower = {};
428
429 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
430 cls_flower.command = FLOW_CLS_DESTROY;
431 cls_flower.cookie = (unsigned long) f;
432
433 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false,
434 &f->flags, &f->in_hw_count, rtnl_held);
435
436 }
437
fl_hw_replace_filter(struct tcf_proto * tp,struct cls_fl_filter * f,bool rtnl_held,struct netlink_ext_ack * extack)438 static int fl_hw_replace_filter(struct tcf_proto *tp,
439 struct cls_fl_filter *f, bool rtnl_held,
440 struct netlink_ext_ack *extack)
441 {
442 struct tcf_block *block = tp->chain->block;
443 struct flow_cls_offload cls_flower = {};
444 bool skip_sw = tc_skip_sw(f->flags);
445 int err = 0;
446
447 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts));
448 if (!cls_flower.rule)
449 return -ENOMEM;
450
451 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
452 cls_flower.command = FLOW_CLS_REPLACE;
453 cls_flower.cookie = (unsigned long) f;
454 cls_flower.rule->match.dissector = &f->mask->dissector;
455 cls_flower.rule->match.mask = &f->mask->key;
456 cls_flower.rule->match.key = &f->mkey;
457 cls_flower.classid = f->res.classid;
458
459 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts);
460 if (err) {
461 kfree(cls_flower.rule);
462 if (skip_sw) {
463 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
464 return err;
465 }
466 return 0;
467 }
468
469 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower,
470 skip_sw, &f->flags, &f->in_hw_count, rtnl_held);
471 tc_cleanup_flow_action(&cls_flower.rule->action);
472 kfree(cls_flower.rule);
473
474 if (err) {
475 fl_hw_destroy_filter(tp, f, rtnl_held, NULL);
476 return err;
477 }
478
479 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
480 return -EINVAL;
481
482 return 0;
483 }
484
fl_hw_update_stats(struct tcf_proto * tp,struct cls_fl_filter * f,bool rtnl_held)485 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f,
486 bool rtnl_held)
487 {
488 struct tcf_block *block = tp->chain->block;
489 struct flow_cls_offload cls_flower = {};
490
491 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
492 cls_flower.command = FLOW_CLS_STATS;
493 cls_flower.cookie = (unsigned long) f;
494 cls_flower.classid = f->res.classid;
495
496 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false,
497 rtnl_held);
498
499 tcf_exts_stats_update(&f->exts, cls_flower.stats.bytes,
500 cls_flower.stats.pkts,
501 cls_flower.stats.drops,
502 cls_flower.stats.lastused,
503 cls_flower.stats.used_hw_stats,
504 cls_flower.stats.used_hw_stats_valid);
505 }
506
__fl_put(struct cls_fl_filter * f)507 static void __fl_put(struct cls_fl_filter *f)
508 {
509 if (!refcount_dec_and_test(&f->refcnt))
510 return;
511
512 if (tcf_exts_get_net(&f->exts))
513 tcf_queue_work(&f->rwork, fl_destroy_filter_work);
514 else
515 __fl_destroy_filter(f);
516 }
517
__fl_get(struct cls_fl_head * head,u32 handle)518 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle)
519 {
520 struct cls_fl_filter *f;
521
522 rcu_read_lock();
523 f = idr_find(&head->handle_idr, handle);
524 if (f && !refcount_inc_not_zero(&f->refcnt))
525 f = NULL;
526 rcu_read_unlock();
527
528 return f;
529 }
530
__fl_delete(struct tcf_proto * tp,struct cls_fl_filter * f,bool * last,bool rtnl_held,struct netlink_ext_ack * extack)531 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
532 bool *last, bool rtnl_held,
533 struct netlink_ext_ack *extack)
534 {
535 struct cls_fl_head *head = fl_head_dereference(tp);
536
537 *last = false;
538
539 spin_lock(&tp->lock);
540 if (f->deleted) {
541 spin_unlock(&tp->lock);
542 return -ENOENT;
543 }
544
545 f->deleted = true;
546 rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
547 f->mask->filter_ht_params);
548 idr_remove(&head->handle_idr, f->handle);
549 list_del_rcu(&f->list);
550 spin_unlock(&tp->lock);
551
552 *last = fl_mask_put(head, f->mask);
553 if (!tc_skip_hw(f->flags))
554 fl_hw_destroy_filter(tp, f, rtnl_held, extack);
555 tcf_unbind_filter(tp, &f->res);
556 __fl_put(f);
557
558 return 0;
559 }
560
fl_destroy_sleepable(struct work_struct * work)561 static void fl_destroy_sleepable(struct work_struct *work)
562 {
563 struct cls_fl_head *head = container_of(to_rcu_work(work),
564 struct cls_fl_head,
565 rwork);
566
567 rhashtable_destroy(&head->ht);
568 kfree(head);
569 module_put(THIS_MODULE);
570 }
571
fl_destroy(struct tcf_proto * tp,bool rtnl_held,struct netlink_ext_ack * extack)572 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held,
573 struct netlink_ext_ack *extack)
574 {
575 struct cls_fl_head *head = fl_head_dereference(tp);
576 struct fl_flow_mask *mask, *next_mask;
577 struct cls_fl_filter *f, *next;
578 bool last;
579
580 list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
581 list_for_each_entry_safe(f, next, &mask->filters, list) {
582 __fl_delete(tp, f, &last, rtnl_held, extack);
583 if (last)
584 break;
585 }
586 }
587 idr_destroy(&head->handle_idr);
588
589 __module_get(THIS_MODULE);
590 tcf_queue_work(&head->rwork, fl_destroy_sleepable);
591 }
592
fl_put(struct tcf_proto * tp,void * arg)593 static void fl_put(struct tcf_proto *tp, void *arg)
594 {
595 struct cls_fl_filter *f = arg;
596
597 __fl_put(f);
598 }
599
fl_get(struct tcf_proto * tp,u32 handle)600 static void *fl_get(struct tcf_proto *tp, u32 handle)
601 {
602 struct cls_fl_head *head = fl_head_dereference(tp);
603
604 return __fl_get(head, handle);
605 }
606
607 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
608 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
609 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
610 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
611 .len = IFNAMSIZ },
612 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
613 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
614 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
615 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
616 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
617 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
618 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
619 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
620 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
621 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
622 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
623 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
624 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
625 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
626 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
627 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
628 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
629 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
630 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
631 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
632 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
633 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
634 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
635 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
636 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
637 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
638 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
639 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
640 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
641 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
642 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
643 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
644 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
645 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
646 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 },
647 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 },
648 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 },
649 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 },
650 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 },
651 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 },
652 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 },
653 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 },
654 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 },
655 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 },
656 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 },
657 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
658 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 },
659 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
660 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 },
661 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
662 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 },
663 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
664 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 },
665 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 },
666 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 },
667 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 },
668 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 },
669 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 },
670 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN },
671 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN },
672 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN },
673 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN },
674 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 },
675 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 },
676 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 },
677 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 },
678 [TCA_FLOWER_KEY_MPLS_OPTS] = { .type = NLA_NESTED },
679 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 },
680 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
681 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 },
682 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 },
683 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 },
684 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 },
685 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 },
686 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 },
687 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 },
688 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 },
689 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
690 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 },
691 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
692 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED },
693 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED },
694 [TCA_FLOWER_KEY_CT_STATE] =
695 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK),
696 [TCA_FLOWER_KEY_CT_STATE_MASK] =
697 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK),
698 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 },
699 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 },
700 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 },
701 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 },
702 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY,
703 .len = 128 / BITS_PER_BYTE },
704 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY,
705 .len = 128 / BITS_PER_BYTE },
706 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 },
707 [TCA_FLOWER_KEY_HASH] = { .type = NLA_U32 },
708 [TCA_FLOWER_KEY_HASH_MASK] = { .type = NLA_U32 },
709
710 };
711
712 static const struct nla_policy
713 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
714 [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = {
715 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN },
716 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED },
717 [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED },
718 [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED },
719 };
720
721 static const struct nla_policy
722 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = {
723 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 },
724 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 },
725 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY,
726 .len = 128 },
727 };
728
729 static const struct nla_policy
730 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = {
731 [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 },
732 };
733
734 static const struct nla_policy
735 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = {
736 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 },
737 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 },
738 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 },
739 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 },
740 };
741
742 static const struct nla_policy
743 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = {
744 [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH] = { .type = NLA_U8 },
745 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL] = { .type = NLA_U8 },
746 [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS] = { .type = NLA_U8 },
747 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC] = { .type = NLA_U8 },
748 [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL] = { .type = NLA_U32 },
749 };
750
fl_set_key_val(struct nlattr ** tb,void * val,int val_type,void * mask,int mask_type,int len)751 static void fl_set_key_val(struct nlattr **tb,
752 void *val, int val_type,
753 void *mask, int mask_type, int len)
754 {
755 if (!tb[val_type])
756 return;
757 nla_memcpy(val, tb[val_type], len);
758 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
759 memset(mask, 0xff, len);
760 else
761 nla_memcpy(mask, tb[mask_type], len);
762 }
763
fl_set_key_port_range(struct nlattr ** tb,struct fl_flow_key * key,struct fl_flow_key * mask,struct netlink_ext_ack * extack)764 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key,
765 struct fl_flow_key *mask,
766 struct netlink_ext_ack *extack)
767 {
768 fl_set_key_val(tb, &key->tp_range.tp_min.dst,
769 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst,
770 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst));
771 fl_set_key_val(tb, &key->tp_range.tp_max.dst,
772 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst,
773 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst));
774 fl_set_key_val(tb, &key->tp_range.tp_min.src,
775 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src,
776 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src));
777 fl_set_key_val(tb, &key->tp_range.tp_max.src,
778 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src,
779 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src));
780
781 if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst &&
782 ntohs(key->tp_range.tp_max.dst) <=
783 ntohs(key->tp_range.tp_min.dst)) {
784 NL_SET_ERR_MSG_ATTR(extack,
785 tb[TCA_FLOWER_KEY_PORT_DST_MIN],
786 "Invalid destination port range (min must be strictly smaller than max)");
787 return -EINVAL;
788 }
789 if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src &&
790 ntohs(key->tp_range.tp_max.src) <=
791 ntohs(key->tp_range.tp_min.src)) {
792 NL_SET_ERR_MSG_ATTR(extack,
793 tb[TCA_FLOWER_KEY_PORT_SRC_MIN],
794 "Invalid source port range (min must be strictly smaller than max)");
795 return -EINVAL;
796 }
797
798 return 0;
799 }
800
fl_set_key_mpls_lse(const struct nlattr * nla_lse,struct flow_dissector_key_mpls * key_val,struct flow_dissector_key_mpls * key_mask,struct netlink_ext_ack * extack)801 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse,
802 struct flow_dissector_key_mpls *key_val,
803 struct flow_dissector_key_mpls *key_mask,
804 struct netlink_ext_ack *extack)
805 {
806 struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1];
807 struct flow_dissector_mpls_lse *lse_mask;
808 struct flow_dissector_mpls_lse *lse_val;
809 u8 lse_index;
810 u8 depth;
811 int err;
812
813 err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse,
814 mpls_stack_entry_policy, extack);
815 if (err < 0)
816 return err;
817
818 if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) {
819 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\"");
820 return -EINVAL;
821 }
822
823 depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]);
824
825 /* LSE depth starts at 1, for consistency with terminology used by
826 * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets.
827 */
828 if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) {
829 NL_SET_ERR_MSG_ATTR(extack,
830 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH],
831 "Invalid MPLS depth");
832 return -EINVAL;
833 }
834 lse_index = depth - 1;
835
836 dissector_set_mpls_lse(key_val, lse_index);
837 dissector_set_mpls_lse(key_mask, lse_index);
838
839 lse_val = &key_val->ls[lse_index];
840 lse_mask = &key_mask->ls[lse_index];
841
842 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) {
843 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]);
844 lse_mask->mpls_ttl = MPLS_TTL_MASK;
845 }
846 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) {
847 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]);
848
849 if (bos & ~MPLS_BOS_MASK) {
850 NL_SET_ERR_MSG_ATTR(extack,
851 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS],
852 "Bottom Of Stack (BOS) must be 0 or 1");
853 return -EINVAL;
854 }
855 lse_val->mpls_bos = bos;
856 lse_mask->mpls_bos = MPLS_BOS_MASK;
857 }
858 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) {
859 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]);
860
861 if (tc & ~MPLS_TC_MASK) {
862 NL_SET_ERR_MSG_ATTR(extack,
863 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC],
864 "Traffic Class (TC) must be between 0 and 7");
865 return -EINVAL;
866 }
867 lse_val->mpls_tc = tc;
868 lse_mask->mpls_tc = MPLS_TC_MASK;
869 }
870 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) {
871 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]);
872
873 if (label & ~MPLS_LABEL_MASK) {
874 NL_SET_ERR_MSG_ATTR(extack,
875 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL],
876 "Label must be between 0 and 1048575");
877 return -EINVAL;
878 }
879 lse_val->mpls_label = label;
880 lse_mask->mpls_label = MPLS_LABEL_MASK;
881 }
882
883 return 0;
884 }
885
fl_set_key_mpls_opts(const struct nlattr * nla_mpls_opts,struct flow_dissector_key_mpls * key_val,struct flow_dissector_key_mpls * key_mask,struct netlink_ext_ack * extack)886 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts,
887 struct flow_dissector_key_mpls *key_val,
888 struct flow_dissector_key_mpls *key_mask,
889 struct netlink_ext_ack *extack)
890 {
891 struct nlattr *nla_lse;
892 int rem;
893 int err;
894
895 if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) {
896 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts,
897 "NLA_F_NESTED is missing");
898 return -EINVAL;
899 }
900
901 nla_for_each_nested(nla_lse, nla_mpls_opts, rem) {
902 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) {
903 NL_SET_ERR_MSG_ATTR(extack, nla_lse,
904 "Invalid MPLS option type");
905 return -EINVAL;
906 }
907
908 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack);
909 if (err < 0)
910 return err;
911 }
912 if (rem) {
913 NL_SET_ERR_MSG(extack,
914 "Bytes leftover after parsing MPLS options");
915 return -EINVAL;
916 }
917
918 return 0;
919 }
920
fl_set_key_mpls(struct nlattr ** tb,struct flow_dissector_key_mpls * key_val,struct flow_dissector_key_mpls * key_mask,struct netlink_ext_ack * extack)921 static int fl_set_key_mpls(struct nlattr **tb,
922 struct flow_dissector_key_mpls *key_val,
923 struct flow_dissector_key_mpls *key_mask,
924 struct netlink_ext_ack *extack)
925 {
926 struct flow_dissector_mpls_lse *lse_mask;
927 struct flow_dissector_mpls_lse *lse_val;
928
929 if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) {
930 if (tb[TCA_FLOWER_KEY_MPLS_TTL] ||
931 tb[TCA_FLOWER_KEY_MPLS_BOS] ||
932 tb[TCA_FLOWER_KEY_MPLS_TC] ||
933 tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
934 NL_SET_ERR_MSG_ATTR(extack,
935 tb[TCA_FLOWER_KEY_MPLS_OPTS],
936 "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute");
937 return -EBADMSG;
938 }
939
940 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS],
941 key_val, key_mask, extack);
942 }
943
944 lse_val = &key_val->ls[0];
945 lse_mask = &key_mask->ls[0];
946
947 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
948 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
949 lse_mask->mpls_ttl = MPLS_TTL_MASK;
950 dissector_set_mpls_lse(key_val, 0);
951 dissector_set_mpls_lse(key_mask, 0);
952 }
953 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
954 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
955
956 if (bos & ~MPLS_BOS_MASK) {
957 NL_SET_ERR_MSG_ATTR(extack,
958 tb[TCA_FLOWER_KEY_MPLS_BOS],
959 "Bottom Of Stack (BOS) must be 0 or 1");
960 return -EINVAL;
961 }
962 lse_val->mpls_bos = bos;
963 lse_mask->mpls_bos = MPLS_BOS_MASK;
964 dissector_set_mpls_lse(key_val, 0);
965 dissector_set_mpls_lse(key_mask, 0);
966 }
967 if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
968 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
969
970 if (tc & ~MPLS_TC_MASK) {
971 NL_SET_ERR_MSG_ATTR(extack,
972 tb[TCA_FLOWER_KEY_MPLS_TC],
973 "Traffic Class (TC) must be between 0 and 7");
974 return -EINVAL;
975 }
976 lse_val->mpls_tc = tc;
977 lse_mask->mpls_tc = MPLS_TC_MASK;
978 dissector_set_mpls_lse(key_val, 0);
979 dissector_set_mpls_lse(key_mask, 0);
980 }
981 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
982 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
983
984 if (label & ~MPLS_LABEL_MASK) {
985 NL_SET_ERR_MSG_ATTR(extack,
986 tb[TCA_FLOWER_KEY_MPLS_LABEL],
987 "Label must be between 0 and 1048575");
988 return -EINVAL;
989 }
990 lse_val->mpls_label = label;
991 lse_mask->mpls_label = MPLS_LABEL_MASK;
992 dissector_set_mpls_lse(key_val, 0);
993 dissector_set_mpls_lse(key_mask, 0);
994 }
995 return 0;
996 }
997
fl_set_key_vlan(struct nlattr ** tb,__be16 ethertype,int vlan_id_key,int vlan_prio_key,int vlan_next_eth_type_key,struct flow_dissector_key_vlan * key_val,struct flow_dissector_key_vlan * key_mask)998 static void fl_set_key_vlan(struct nlattr **tb,
999 __be16 ethertype,
1000 int vlan_id_key, int vlan_prio_key,
1001 int vlan_next_eth_type_key,
1002 struct flow_dissector_key_vlan *key_val,
1003 struct flow_dissector_key_vlan *key_mask)
1004 {
1005 #define VLAN_PRIORITY_MASK 0x7
1006
1007 if (tb[vlan_id_key]) {
1008 key_val->vlan_id =
1009 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
1010 key_mask->vlan_id = VLAN_VID_MASK;
1011 }
1012 if (tb[vlan_prio_key]) {
1013 key_val->vlan_priority =
1014 nla_get_u8(tb[vlan_prio_key]) &
1015 VLAN_PRIORITY_MASK;
1016 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
1017 }
1018 key_val->vlan_tpid = ethertype;
1019 key_mask->vlan_tpid = cpu_to_be16(~0);
1020 if (tb[vlan_next_eth_type_key]) {
1021 key_val->vlan_eth_type =
1022 nla_get_be16(tb[vlan_next_eth_type_key]);
1023 key_mask->vlan_eth_type = cpu_to_be16(~0);
1024 }
1025 }
1026
fl_set_key_flag(u32 flower_key,u32 flower_mask,u32 * dissector_key,u32 * dissector_mask,u32 flower_flag_bit,u32 dissector_flag_bit)1027 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
1028 u32 *dissector_key, u32 *dissector_mask,
1029 u32 flower_flag_bit, u32 dissector_flag_bit)
1030 {
1031 if (flower_mask & flower_flag_bit) {
1032 *dissector_mask |= dissector_flag_bit;
1033 if (flower_key & flower_flag_bit)
1034 *dissector_key |= dissector_flag_bit;
1035 }
1036 }
1037
fl_set_key_flags(struct nlattr ** tb,u32 * flags_key,u32 * flags_mask,struct netlink_ext_ack * extack)1038 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key,
1039 u32 *flags_mask, struct netlink_ext_ack *extack)
1040 {
1041 u32 key, mask;
1042
1043 /* mask is mandatory for flags */
1044 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) {
1045 NL_SET_ERR_MSG(extack, "Missing flags mask");
1046 return -EINVAL;
1047 }
1048
1049 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
1050 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
1051
1052 *flags_key = 0;
1053 *flags_mask = 0;
1054
1055 fl_set_key_flag(key, mask, flags_key, flags_mask,
1056 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1057 fl_set_key_flag(key, mask, flags_key, flags_mask,
1058 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1059 FLOW_DIS_FIRST_FRAG);
1060
1061 return 0;
1062 }
1063
fl_set_key_ip(struct nlattr ** tb,bool encap,struct flow_dissector_key_ip * key,struct flow_dissector_key_ip * mask)1064 static void fl_set_key_ip(struct nlattr **tb, bool encap,
1065 struct flow_dissector_key_ip *key,
1066 struct flow_dissector_key_ip *mask)
1067 {
1068 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
1069 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
1070 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
1071 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
1072
1073 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
1074 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
1075 }
1076
fl_set_geneve_opt(const struct nlattr * nla,struct fl_flow_key * key,int depth,int option_len,struct netlink_ext_ack * extack)1077 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
1078 int depth, int option_len,
1079 struct netlink_ext_ack *extack)
1080 {
1081 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
1082 struct nlattr *class = NULL, *type = NULL, *data = NULL;
1083 struct geneve_opt *opt;
1084 int err, data_len = 0;
1085
1086 if (option_len > sizeof(struct geneve_opt))
1087 data_len = option_len - sizeof(struct geneve_opt);
1088
1089 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
1090 memset(opt, 0xff, option_len);
1091 opt->length = data_len / 4;
1092 opt->r1 = 0;
1093 opt->r2 = 0;
1094 opt->r3 = 0;
1095
1096 /* If no mask has been prodived we assume an exact match. */
1097 if (!depth)
1098 return sizeof(struct geneve_opt) + data_len;
1099
1100 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
1101 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
1102 return -EINVAL;
1103 }
1104
1105 err = nla_parse_nested_deprecated(tb,
1106 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
1107 nla, geneve_opt_policy, extack);
1108 if (err < 0)
1109 return err;
1110
1111 /* We are not allowed to omit any of CLASS, TYPE or DATA
1112 * fields from the key.
1113 */
1114 if (!option_len &&
1115 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
1116 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
1117 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
1118 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
1119 return -EINVAL;
1120 }
1121
1122 /* Omitting any of CLASS, TYPE or DATA fields is allowed
1123 * for the mask.
1124 */
1125 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
1126 int new_len = key->enc_opts.len;
1127
1128 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
1129 data_len = nla_len(data);
1130 if (data_len < 4) {
1131 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
1132 return -ERANGE;
1133 }
1134 if (data_len % 4) {
1135 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
1136 return -ERANGE;
1137 }
1138
1139 new_len += sizeof(struct geneve_opt) + data_len;
1140 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
1141 if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
1142 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
1143 return -ERANGE;
1144 }
1145 opt->length = data_len / 4;
1146 memcpy(opt->opt_data, nla_data(data), data_len);
1147 }
1148
1149 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
1150 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
1151 opt->opt_class = nla_get_be16(class);
1152 }
1153
1154 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
1155 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
1156 opt->type = nla_get_u8(type);
1157 }
1158
1159 return sizeof(struct geneve_opt) + data_len;
1160 }
1161
fl_set_vxlan_opt(const struct nlattr * nla,struct fl_flow_key * key,int depth,int option_len,struct netlink_ext_ack * extack)1162 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1163 int depth, int option_len,
1164 struct netlink_ext_ack *extack)
1165 {
1166 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1];
1167 struct vxlan_metadata *md;
1168 int err;
1169
1170 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1171 memset(md, 0xff, sizeof(*md));
1172
1173 if (!depth)
1174 return sizeof(*md);
1175
1176 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) {
1177 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask");
1178 return -EINVAL;
1179 }
1180
1181 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla,
1182 vxlan_opt_policy, extack);
1183 if (err < 0)
1184 return err;
1185
1186 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1187 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp");
1188 return -EINVAL;
1189 }
1190
1191 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1192 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]);
1193 md->gbp &= VXLAN_GBP_MASK;
1194 }
1195
1196 return sizeof(*md);
1197 }
1198
fl_set_erspan_opt(const struct nlattr * nla,struct fl_flow_key * key,int depth,int option_len,struct netlink_ext_ack * extack)1199 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1200 int depth, int option_len,
1201 struct netlink_ext_ack *extack)
1202 {
1203 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1];
1204 struct erspan_metadata *md;
1205 int err;
1206
1207 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1208 memset(md, 0xff, sizeof(*md));
1209 md->version = 1;
1210
1211 if (!depth)
1212 return sizeof(*md);
1213
1214 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) {
1215 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask");
1216 return -EINVAL;
1217 }
1218
1219 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla,
1220 erspan_opt_policy, extack);
1221 if (err < 0)
1222 return err;
1223
1224 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) {
1225 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver");
1226 return -EINVAL;
1227 }
1228
1229 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER])
1230 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]);
1231
1232 if (md->version == 1) {
1233 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1234 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index");
1235 return -EINVAL;
1236 }
1237 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1238 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX];
1239 memset(&md->u, 0x00, sizeof(md->u));
1240 md->u.index = nla_get_be32(nla);
1241 }
1242 } else if (md->version == 2) {
1243 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] ||
1244 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) {
1245 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid");
1246 return -EINVAL;
1247 }
1248 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) {
1249 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR];
1250 md->u.md2.dir = nla_get_u8(nla);
1251 }
1252 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) {
1253 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID];
1254 set_hwid(&md->u.md2, nla_get_u8(nla));
1255 }
1256 } else {
1257 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect");
1258 return -EINVAL;
1259 }
1260
1261 return sizeof(*md);
1262 }
1263
fl_set_enc_opt(struct nlattr ** tb,struct fl_flow_key * key,struct fl_flow_key * mask,struct netlink_ext_ack * extack)1264 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
1265 struct fl_flow_key *mask,
1266 struct netlink_ext_ack *extack)
1267 {
1268 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
1269 int err, option_len, key_depth, msk_depth = 0;
1270
1271 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS],
1272 TCA_FLOWER_KEY_ENC_OPTS_MAX,
1273 enc_opts_policy, extack);
1274 if (err)
1275 return err;
1276
1277 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
1278
1279 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
1280 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
1281 TCA_FLOWER_KEY_ENC_OPTS_MAX,
1282 enc_opts_policy, extack);
1283 if (err)
1284 return err;
1285
1286 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1287 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1288 if (!nla_ok(nla_opt_msk, msk_depth)) {
1289 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks");
1290 return -EINVAL;
1291 }
1292 }
1293
1294 nla_for_each_attr(nla_opt_key, nla_enc_key,
1295 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
1296 switch (nla_type(nla_opt_key)) {
1297 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
1298 if (key->enc_opts.dst_opt_type &&
1299 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) {
1300 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options");
1301 return -EINVAL;
1302 }
1303 option_len = 0;
1304 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1305 option_len = fl_set_geneve_opt(nla_opt_key, key,
1306 key_depth, option_len,
1307 extack);
1308 if (option_len < 0)
1309 return option_len;
1310
1311 key->enc_opts.len += option_len;
1312 /* At the same time we need to parse through the mask
1313 * in order to verify exact and mask attribute lengths.
1314 */
1315 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1316 option_len = fl_set_geneve_opt(nla_opt_msk, mask,
1317 msk_depth, option_len,
1318 extack);
1319 if (option_len < 0)
1320 return option_len;
1321
1322 mask->enc_opts.len += option_len;
1323 if (key->enc_opts.len != mask->enc_opts.len) {
1324 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1325 return -EINVAL;
1326 }
1327 break;
1328 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN:
1329 if (key->enc_opts.dst_opt_type) {
1330 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options");
1331 return -EINVAL;
1332 }
1333 option_len = 0;
1334 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1335 option_len = fl_set_vxlan_opt(nla_opt_key, key,
1336 key_depth, option_len,
1337 extack);
1338 if (option_len < 0)
1339 return option_len;
1340
1341 key->enc_opts.len += option_len;
1342 /* At the same time we need to parse through the mask
1343 * in order to verify exact and mask attribute lengths.
1344 */
1345 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1346 option_len = fl_set_vxlan_opt(nla_opt_msk, mask,
1347 msk_depth, option_len,
1348 extack);
1349 if (option_len < 0)
1350 return option_len;
1351
1352 mask->enc_opts.len += option_len;
1353 if (key->enc_opts.len != mask->enc_opts.len) {
1354 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1355 return -EINVAL;
1356 }
1357 break;
1358 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN:
1359 if (key->enc_opts.dst_opt_type) {
1360 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options");
1361 return -EINVAL;
1362 }
1363 option_len = 0;
1364 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1365 option_len = fl_set_erspan_opt(nla_opt_key, key,
1366 key_depth, option_len,
1367 extack);
1368 if (option_len < 0)
1369 return option_len;
1370
1371 key->enc_opts.len += option_len;
1372 /* At the same time we need to parse through the mask
1373 * in order to verify exact and mask attribute lengths.
1374 */
1375 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1376 option_len = fl_set_erspan_opt(nla_opt_msk, mask,
1377 msk_depth, option_len,
1378 extack);
1379 if (option_len < 0)
1380 return option_len;
1381
1382 mask->enc_opts.len += option_len;
1383 if (key->enc_opts.len != mask->enc_opts.len) {
1384 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1385 return -EINVAL;
1386 }
1387 break;
1388 default:
1389 NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
1390 return -EINVAL;
1391 }
1392
1393 if (!msk_depth)
1394 continue;
1395
1396 if (!nla_ok(nla_opt_msk, msk_depth)) {
1397 NL_SET_ERR_MSG(extack, "A mask attribute is invalid");
1398 return -EINVAL;
1399 }
1400 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
1401 }
1402
1403 return 0;
1404 }
1405
fl_validate_ct_state(u16 state,struct nlattr * tb,struct netlink_ext_ack * extack)1406 static int fl_validate_ct_state(u16 state, struct nlattr *tb,
1407 struct netlink_ext_ack *extack)
1408 {
1409 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) {
1410 NL_SET_ERR_MSG_ATTR(extack, tb,
1411 "no trk, so no other flag can be set");
1412 return -EINVAL;
1413 }
1414
1415 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW &&
1416 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) {
1417 NL_SET_ERR_MSG_ATTR(extack, tb,
1418 "new and est are mutually exclusive");
1419 return -EINVAL;
1420 }
1421
1422 return 0;
1423 }
1424
fl_set_key_ct(struct nlattr ** tb,struct flow_dissector_key_ct * key,struct flow_dissector_key_ct * mask,struct netlink_ext_ack * extack)1425 static int fl_set_key_ct(struct nlattr **tb,
1426 struct flow_dissector_key_ct *key,
1427 struct flow_dissector_key_ct *mask,
1428 struct netlink_ext_ack *extack)
1429 {
1430 if (tb[TCA_FLOWER_KEY_CT_STATE]) {
1431 int err;
1432
1433 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) {
1434 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled");
1435 return -EOPNOTSUPP;
1436 }
1437 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
1438 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
1439 sizeof(key->ct_state));
1440
1441 err = fl_validate_ct_state(key->ct_state & mask->ct_state,
1442 tb[TCA_FLOWER_KEY_CT_STATE_MASK],
1443 extack);
1444 if (err)
1445 return err;
1446
1447 }
1448 if (tb[TCA_FLOWER_KEY_CT_ZONE]) {
1449 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
1450 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled");
1451 return -EOPNOTSUPP;
1452 }
1453 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
1454 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
1455 sizeof(key->ct_zone));
1456 }
1457 if (tb[TCA_FLOWER_KEY_CT_MARK]) {
1458 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
1459 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled");
1460 return -EOPNOTSUPP;
1461 }
1462 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
1463 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
1464 sizeof(key->ct_mark));
1465 }
1466 if (tb[TCA_FLOWER_KEY_CT_LABELS]) {
1467 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
1468 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled");
1469 return -EOPNOTSUPP;
1470 }
1471 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
1472 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
1473 sizeof(key->ct_labels));
1474 }
1475
1476 return 0;
1477 }
1478
fl_set_key(struct net * net,struct nlattr ** tb,struct fl_flow_key * key,struct fl_flow_key * mask,struct netlink_ext_ack * extack)1479 static int fl_set_key(struct net *net, struct nlattr **tb,
1480 struct fl_flow_key *key, struct fl_flow_key *mask,
1481 struct netlink_ext_ack *extack)
1482 {
1483 __be16 ethertype;
1484 int ret = 0;
1485
1486 if (tb[TCA_FLOWER_INDEV]) {
1487 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
1488 if (err < 0)
1489 return err;
1490 key->meta.ingress_ifindex = err;
1491 mask->meta.ingress_ifindex = 0xffffffff;
1492 }
1493
1494 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1495 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1496 sizeof(key->eth.dst));
1497 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1498 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1499 sizeof(key->eth.src));
1500
1501 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
1502 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
1503
1504 if (eth_type_vlan(ethertype)) {
1505 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
1506 TCA_FLOWER_KEY_VLAN_PRIO,
1507 TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1508 &key->vlan, &mask->vlan);
1509
1510 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) {
1511 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]);
1512 if (eth_type_vlan(ethertype)) {
1513 fl_set_key_vlan(tb, ethertype,
1514 TCA_FLOWER_KEY_CVLAN_ID,
1515 TCA_FLOWER_KEY_CVLAN_PRIO,
1516 TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1517 &key->cvlan, &mask->cvlan);
1518 fl_set_key_val(tb, &key->basic.n_proto,
1519 TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1520 &mask->basic.n_proto,
1521 TCA_FLOWER_UNSPEC,
1522 sizeof(key->basic.n_proto));
1523 } else {
1524 key->basic.n_proto = ethertype;
1525 mask->basic.n_proto = cpu_to_be16(~0);
1526 }
1527 }
1528 } else {
1529 key->basic.n_proto = ethertype;
1530 mask->basic.n_proto = cpu_to_be16(~0);
1531 }
1532 }
1533
1534 if (key->basic.n_proto == htons(ETH_P_IP) ||
1535 key->basic.n_proto == htons(ETH_P_IPV6)) {
1536 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1537 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1538 sizeof(key->basic.ip_proto));
1539 fl_set_key_ip(tb, false, &key->ip, &mask->ip);
1540 }
1541
1542 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
1543 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1544 mask->control.addr_type = ~0;
1545 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1546 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1547 sizeof(key->ipv4.src));
1548 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1549 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1550 sizeof(key->ipv4.dst));
1551 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
1552 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1553 mask->control.addr_type = ~0;
1554 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1555 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1556 sizeof(key->ipv6.src));
1557 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1558 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1559 sizeof(key->ipv6.dst));
1560 }
1561
1562 if (key->basic.ip_proto == IPPROTO_TCP) {
1563 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1564 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1565 sizeof(key->tp.src));
1566 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1567 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1568 sizeof(key->tp.dst));
1569 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1570 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1571 sizeof(key->tcp.flags));
1572 } else if (key->basic.ip_proto == IPPROTO_UDP) {
1573 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1574 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1575 sizeof(key->tp.src));
1576 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1577 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1578 sizeof(key->tp.dst));
1579 } else if (key->basic.ip_proto == IPPROTO_SCTP) {
1580 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1581 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1582 sizeof(key->tp.src));
1583 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1584 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1585 sizeof(key->tp.dst));
1586 } else if (key->basic.n_proto == htons(ETH_P_IP) &&
1587 key->basic.ip_proto == IPPROTO_ICMP) {
1588 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
1589 &mask->icmp.type,
1590 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1591 sizeof(key->icmp.type));
1592 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
1593 &mask->icmp.code,
1594 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1595 sizeof(key->icmp.code));
1596 } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1597 key->basic.ip_proto == IPPROTO_ICMPV6) {
1598 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
1599 &mask->icmp.type,
1600 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1601 sizeof(key->icmp.type));
1602 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
1603 &mask->icmp.code,
1604 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1605 sizeof(key->icmp.code));
1606 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
1607 key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
1608 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack);
1609 if (ret)
1610 return ret;
1611 } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
1612 key->basic.n_proto == htons(ETH_P_RARP)) {
1613 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
1614 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
1615 sizeof(key->arp.sip));
1616 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
1617 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
1618 sizeof(key->arp.tip));
1619 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
1620 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
1621 sizeof(key->arp.op));
1622 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1623 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1624 sizeof(key->arp.sha));
1625 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1626 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1627 sizeof(key->arp.tha));
1628 }
1629
1630 if (key->basic.ip_proto == IPPROTO_TCP ||
1631 key->basic.ip_proto == IPPROTO_UDP ||
1632 key->basic.ip_proto == IPPROTO_SCTP) {
1633 ret = fl_set_key_port_range(tb, key, mask, extack);
1634 if (ret)
1635 return ret;
1636 }
1637
1638 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
1639 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
1640 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1641 mask->enc_control.addr_type = ~0;
1642 fl_set_key_val(tb, &key->enc_ipv4.src,
1643 TCA_FLOWER_KEY_ENC_IPV4_SRC,
1644 &mask->enc_ipv4.src,
1645 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1646 sizeof(key->enc_ipv4.src));
1647 fl_set_key_val(tb, &key->enc_ipv4.dst,
1648 TCA_FLOWER_KEY_ENC_IPV4_DST,
1649 &mask->enc_ipv4.dst,
1650 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1651 sizeof(key->enc_ipv4.dst));
1652 }
1653
1654 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
1655 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
1656 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1657 mask->enc_control.addr_type = ~0;
1658 fl_set_key_val(tb, &key->enc_ipv6.src,
1659 TCA_FLOWER_KEY_ENC_IPV6_SRC,
1660 &mask->enc_ipv6.src,
1661 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1662 sizeof(key->enc_ipv6.src));
1663 fl_set_key_val(tb, &key->enc_ipv6.dst,
1664 TCA_FLOWER_KEY_ENC_IPV6_DST,
1665 &mask->enc_ipv6.dst,
1666 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1667 sizeof(key->enc_ipv6.dst));
1668 }
1669
1670 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
1671 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
1672 sizeof(key->enc_key_id.keyid));
1673
1674 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1675 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1676 sizeof(key->enc_tp.src));
1677
1678 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1679 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1680 sizeof(key->enc_tp.dst));
1681
1682 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
1683
1684 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
1685 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
1686 sizeof(key->hash.hash));
1687
1688 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
1689 ret = fl_set_enc_opt(tb, key, mask, extack);
1690 if (ret)
1691 return ret;
1692 }
1693
1694 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack);
1695 if (ret)
1696 return ret;
1697
1698 if (tb[TCA_FLOWER_KEY_FLAGS])
1699 ret = fl_set_key_flags(tb, &key->control.flags,
1700 &mask->control.flags, extack);
1701
1702 return ret;
1703 }
1704
fl_mask_copy(struct fl_flow_mask * dst,struct fl_flow_mask * src)1705 static void fl_mask_copy(struct fl_flow_mask *dst,
1706 struct fl_flow_mask *src)
1707 {
1708 const void *psrc = fl_key_get_start(&src->key, src);
1709 void *pdst = fl_key_get_start(&dst->key, src);
1710
1711 memcpy(pdst, psrc, fl_mask_range(src));
1712 dst->range = src->range;
1713 }
1714
1715 static const struct rhashtable_params fl_ht_params = {
1716 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
1717 .head_offset = offsetof(struct cls_fl_filter, ht_node),
1718 .automatic_shrinking = true,
1719 };
1720
fl_init_mask_hashtable(struct fl_flow_mask * mask)1721 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
1722 {
1723 mask->filter_ht_params = fl_ht_params;
1724 mask->filter_ht_params.key_len = fl_mask_range(mask);
1725 mask->filter_ht_params.key_offset += mask->range.start;
1726
1727 return rhashtable_init(&mask->ht, &mask->filter_ht_params);
1728 }
1729
1730 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
1731 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member)
1732
1733 #define FL_KEY_IS_MASKED(mask, member) \
1734 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
1735 0, FL_KEY_MEMBER_SIZE(member)) \
1736
1737 #define FL_KEY_SET(keys, cnt, id, member) \
1738 do { \
1739 keys[cnt].key_id = id; \
1740 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
1741 cnt++; \
1742 } while(0);
1743
1744 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
1745 do { \
1746 if (FL_KEY_IS_MASKED(mask, member)) \
1747 FL_KEY_SET(keys, cnt, id, member); \
1748 } while(0);
1749
fl_init_dissector(struct flow_dissector * dissector,struct fl_flow_key * mask)1750 static void fl_init_dissector(struct flow_dissector *dissector,
1751 struct fl_flow_key *mask)
1752 {
1753 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
1754 size_t cnt = 0;
1755
1756 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1757 FLOW_DISSECTOR_KEY_META, meta);
1758 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
1759 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
1760 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1761 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
1762 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1763 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
1764 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1765 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
1766 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1767 FLOW_DISSECTOR_KEY_PORTS, tp);
1768 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1769 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range);
1770 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1771 FLOW_DISSECTOR_KEY_IP, ip);
1772 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1773 FLOW_DISSECTOR_KEY_TCP, tcp);
1774 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1775 FLOW_DISSECTOR_KEY_ICMP, icmp);
1776 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1777 FLOW_DISSECTOR_KEY_ARP, arp);
1778 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1779 FLOW_DISSECTOR_KEY_MPLS, mpls);
1780 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1781 FLOW_DISSECTOR_KEY_VLAN, vlan);
1782 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1783 FLOW_DISSECTOR_KEY_CVLAN, cvlan);
1784 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1785 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
1786 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1787 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
1788 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1789 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
1790 if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
1791 FL_KEY_IS_MASKED(mask, enc_ipv6))
1792 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
1793 enc_control);
1794 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1795 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
1796 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1797 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
1798 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1799 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
1800 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1801 FLOW_DISSECTOR_KEY_CT, ct);
1802 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1803 FLOW_DISSECTOR_KEY_HASH, hash);
1804
1805 skb_flow_dissector_init(dissector, keys, cnt);
1806 }
1807
fl_create_new_mask(struct cls_fl_head * head,struct fl_flow_mask * mask)1808 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
1809 struct fl_flow_mask *mask)
1810 {
1811 struct fl_flow_mask *newmask;
1812 int err;
1813
1814 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
1815 if (!newmask)
1816 return ERR_PTR(-ENOMEM);
1817
1818 fl_mask_copy(newmask, mask);
1819
1820 if ((newmask->key.tp_range.tp_min.dst &&
1821 newmask->key.tp_range.tp_max.dst) ||
1822 (newmask->key.tp_range.tp_min.src &&
1823 newmask->key.tp_range.tp_max.src))
1824 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE;
1825
1826 err = fl_init_mask_hashtable(newmask);
1827 if (err)
1828 goto errout_free;
1829
1830 fl_init_dissector(&newmask->dissector, &newmask->key);
1831
1832 INIT_LIST_HEAD_RCU(&newmask->filters);
1833
1834 refcount_set(&newmask->refcnt, 1);
1835 err = rhashtable_replace_fast(&head->ht, &mask->ht_node,
1836 &newmask->ht_node, mask_ht_params);
1837 if (err)
1838 goto errout_destroy;
1839
1840 spin_lock(&head->masks_lock);
1841 list_add_tail_rcu(&newmask->list, &head->masks);
1842 spin_unlock(&head->masks_lock);
1843
1844 return newmask;
1845
1846 errout_destroy:
1847 rhashtable_destroy(&newmask->ht);
1848 errout_free:
1849 kfree(newmask);
1850
1851 return ERR_PTR(err);
1852 }
1853
fl_check_assign_mask(struct cls_fl_head * head,struct cls_fl_filter * fnew,struct cls_fl_filter * fold,struct fl_flow_mask * mask)1854 static int fl_check_assign_mask(struct cls_fl_head *head,
1855 struct cls_fl_filter *fnew,
1856 struct cls_fl_filter *fold,
1857 struct fl_flow_mask *mask)
1858 {
1859 struct fl_flow_mask *newmask;
1860 int ret = 0;
1861
1862 rcu_read_lock();
1863
1864 /* Insert mask as temporary node to prevent concurrent creation of mask
1865 * with same key. Any concurrent lookups with same key will return
1866 * -EAGAIN because mask's refcnt is zero.
1867 */
1868 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht,
1869 &mask->ht_node,
1870 mask_ht_params);
1871 if (!fnew->mask) {
1872 rcu_read_unlock();
1873
1874 if (fold) {
1875 ret = -EINVAL;
1876 goto errout_cleanup;
1877 }
1878
1879 newmask = fl_create_new_mask(head, mask);
1880 if (IS_ERR(newmask)) {
1881 ret = PTR_ERR(newmask);
1882 goto errout_cleanup;
1883 }
1884
1885 fnew->mask = newmask;
1886 return 0;
1887 } else if (IS_ERR(fnew->mask)) {
1888 ret = PTR_ERR(fnew->mask);
1889 } else if (fold && fold->mask != fnew->mask) {
1890 ret = -EINVAL;
1891 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) {
1892 /* Mask was deleted concurrently, try again */
1893 ret = -EAGAIN;
1894 }
1895 rcu_read_unlock();
1896 return ret;
1897
1898 errout_cleanup:
1899 rhashtable_remove_fast(&head->ht, &mask->ht_node,
1900 mask_ht_params);
1901 return ret;
1902 }
1903
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)1904 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
1905 struct cls_fl_filter *f, struct fl_flow_mask *mask,
1906 unsigned long base, struct nlattr **tb,
1907 struct nlattr *est, bool ovr,
1908 struct fl_flow_tmplt *tmplt, bool rtnl_held,
1909 struct netlink_ext_ack *extack)
1910 {
1911 int err;
1912
1913 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, rtnl_held,
1914 extack);
1915 if (err < 0)
1916 return err;
1917
1918 if (tb[TCA_FLOWER_CLASSID]) {
1919 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
1920 if (!rtnl_held)
1921 rtnl_lock();
1922 tcf_bind_filter(tp, &f->res, base);
1923 if (!rtnl_held)
1924 rtnl_unlock();
1925 }
1926
1927 err = fl_set_key(net, tb, &f->key, &mask->key, extack);
1928 if (err)
1929 return err;
1930
1931 fl_mask_update_range(mask);
1932 fl_set_masked_key(&f->mkey, &f->key, mask);
1933
1934 if (!fl_mask_fits_tmplt(tmplt, mask)) {
1935 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
1936 return -EINVAL;
1937 }
1938
1939 return 0;
1940 }
1941
fl_ht_insert_unique(struct cls_fl_filter * fnew,struct cls_fl_filter * fold,bool * in_ht)1942 static int fl_ht_insert_unique(struct cls_fl_filter *fnew,
1943 struct cls_fl_filter *fold,
1944 bool *in_ht)
1945 {
1946 struct fl_flow_mask *mask = fnew->mask;
1947 int err;
1948
1949 err = rhashtable_lookup_insert_fast(&mask->ht,
1950 &fnew->ht_node,
1951 mask->filter_ht_params);
1952 if (err) {
1953 *in_ht = false;
1954 /* It is okay if filter with same key exists when
1955 * overwriting.
1956 */
1957 return fold && err == -EEXIST ? 0 : err;
1958 }
1959
1960 *in_ht = true;
1961 return 0;
1962 }
1963
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)1964 static int fl_change(struct net *net, struct sk_buff *in_skb,
1965 struct tcf_proto *tp, unsigned long base,
1966 u32 handle, struct nlattr **tca,
1967 void **arg, bool ovr, bool rtnl_held,
1968 struct netlink_ext_ack *extack)
1969 {
1970 struct cls_fl_head *head = fl_head_dereference(tp);
1971 struct cls_fl_filter *fold = *arg;
1972 struct cls_fl_filter *fnew;
1973 struct fl_flow_mask *mask;
1974 struct nlattr **tb;
1975 bool in_ht;
1976 int err;
1977
1978 if (!tca[TCA_OPTIONS]) {
1979 err = -EINVAL;
1980 goto errout_fold;
1981 }
1982
1983 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL);
1984 if (!mask) {
1985 err = -ENOBUFS;
1986 goto errout_fold;
1987 }
1988
1989 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1990 if (!tb) {
1991 err = -ENOBUFS;
1992 goto errout_mask_alloc;
1993 }
1994
1995 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
1996 tca[TCA_OPTIONS], fl_policy, NULL);
1997 if (err < 0)
1998 goto errout_tb;
1999
2000 if (fold && handle && fold->handle != handle) {
2001 err = -EINVAL;
2002 goto errout_tb;
2003 }
2004
2005 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
2006 if (!fnew) {
2007 err = -ENOBUFS;
2008 goto errout_tb;
2009 }
2010 INIT_LIST_HEAD(&fnew->hw_list);
2011 refcount_set(&fnew->refcnt, 1);
2012
2013 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0);
2014 if (err < 0)
2015 goto errout;
2016
2017 if (tb[TCA_FLOWER_FLAGS]) {
2018 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
2019
2020 if (!tc_flags_valid(fnew->flags)) {
2021 err = -EINVAL;
2022 goto errout;
2023 }
2024 }
2025
2026 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr,
2027 tp->chain->tmplt_priv, rtnl_held, extack);
2028 if (err)
2029 goto errout;
2030
2031 err = fl_check_assign_mask(head, fnew, fold, mask);
2032 if (err)
2033 goto errout;
2034
2035 err = fl_ht_insert_unique(fnew, fold, &in_ht);
2036 if (err)
2037 goto errout_mask;
2038
2039 if (!tc_skip_hw(fnew->flags)) {
2040 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack);
2041 if (err)
2042 goto errout_ht;
2043 }
2044
2045 if (!tc_in_hw(fnew->flags))
2046 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
2047
2048 spin_lock(&tp->lock);
2049
2050 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup
2051 * proto again or create new one, if necessary.
2052 */
2053 if (tp->deleting) {
2054 err = -EAGAIN;
2055 goto errout_hw;
2056 }
2057
2058 if (fold) {
2059 /* Fold filter was deleted concurrently. Retry lookup. */
2060 if (fold->deleted) {
2061 err = -EAGAIN;
2062 goto errout_hw;
2063 }
2064
2065 fnew->handle = handle;
2066
2067 if (!in_ht) {
2068 struct rhashtable_params params =
2069 fnew->mask->filter_ht_params;
2070
2071 err = rhashtable_insert_fast(&fnew->mask->ht,
2072 &fnew->ht_node,
2073 params);
2074 if (err)
2075 goto errout_hw;
2076 in_ht = true;
2077 }
2078
2079 refcount_inc(&fnew->refcnt);
2080 rhashtable_remove_fast(&fold->mask->ht,
2081 &fold->ht_node,
2082 fold->mask->filter_ht_params);
2083 idr_replace(&head->handle_idr, fnew, fnew->handle);
2084 list_replace_rcu(&fold->list, &fnew->list);
2085 fold->deleted = true;
2086
2087 spin_unlock(&tp->lock);
2088
2089 fl_mask_put(head, fold->mask);
2090 if (!tc_skip_hw(fold->flags))
2091 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL);
2092 tcf_unbind_filter(tp, &fold->res);
2093 /* Caller holds reference to fold, so refcnt is always > 0
2094 * after this.
2095 */
2096 refcount_dec(&fold->refcnt);
2097 __fl_put(fold);
2098 } else {
2099 if (handle) {
2100 /* user specifies a handle and it doesn't exist */
2101 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
2102 handle, GFP_ATOMIC);
2103
2104 /* Filter with specified handle was concurrently
2105 * inserted after initial check in cls_api. This is not
2106 * necessarily an error if NLM_F_EXCL is not set in
2107 * message flags. Returning EAGAIN will cause cls_api to
2108 * try to update concurrently inserted rule.
2109 */
2110 if (err == -ENOSPC)
2111 err = -EAGAIN;
2112 } else {
2113 handle = 1;
2114 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
2115 INT_MAX, GFP_ATOMIC);
2116 }
2117 if (err)
2118 goto errout_hw;
2119
2120 refcount_inc(&fnew->refcnt);
2121 fnew->handle = handle;
2122 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
2123 spin_unlock(&tp->lock);
2124 }
2125
2126 *arg = fnew;
2127
2128 kfree(tb);
2129 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2130 return 0;
2131
2132 errout_ht:
2133 spin_lock(&tp->lock);
2134 errout_hw:
2135 fnew->deleted = true;
2136 spin_unlock(&tp->lock);
2137 if (!tc_skip_hw(fnew->flags))
2138 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL);
2139 if (in_ht)
2140 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node,
2141 fnew->mask->filter_ht_params);
2142 errout_mask:
2143 fl_mask_put(head, fnew->mask);
2144 errout:
2145 __fl_put(fnew);
2146 errout_tb:
2147 kfree(tb);
2148 errout_mask_alloc:
2149 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2150 errout_fold:
2151 if (fold)
2152 __fl_put(fold);
2153 return err;
2154 }
2155
fl_delete(struct tcf_proto * tp,void * arg,bool * last,bool rtnl_held,struct netlink_ext_ack * extack)2156 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
2157 bool rtnl_held, struct netlink_ext_ack *extack)
2158 {
2159 struct cls_fl_head *head = fl_head_dereference(tp);
2160 struct cls_fl_filter *f = arg;
2161 bool last_on_mask;
2162 int err = 0;
2163
2164 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack);
2165 *last = list_empty(&head->masks);
2166 __fl_put(f);
2167
2168 return err;
2169 }
2170
fl_walk(struct tcf_proto * tp,struct tcf_walker * arg,bool rtnl_held)2171 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg,
2172 bool rtnl_held)
2173 {
2174 struct cls_fl_head *head = fl_head_dereference(tp);
2175 unsigned long id = arg->cookie, tmp;
2176 struct cls_fl_filter *f;
2177
2178 arg->count = arg->skip;
2179
2180 rcu_read_lock();
2181 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) {
2182 /* don't return filters that are being deleted */
2183 if (!refcount_inc_not_zero(&f->refcnt))
2184 continue;
2185 rcu_read_unlock();
2186
2187 if (arg->fn(tp, f, arg) < 0) {
2188 __fl_put(f);
2189 arg->stop = 1;
2190 rcu_read_lock();
2191 break;
2192 }
2193 __fl_put(f);
2194 arg->count++;
2195 rcu_read_lock();
2196 }
2197 rcu_read_unlock();
2198 arg->cookie = id;
2199 }
2200
2201 static struct cls_fl_filter *
fl_get_next_hw_filter(struct tcf_proto * tp,struct cls_fl_filter * f,bool add)2202 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add)
2203 {
2204 struct cls_fl_head *head = fl_head_dereference(tp);
2205
2206 spin_lock(&tp->lock);
2207 if (list_empty(&head->hw_filters)) {
2208 spin_unlock(&tp->lock);
2209 return NULL;
2210 }
2211
2212 if (!f)
2213 f = list_entry(&head->hw_filters, struct cls_fl_filter,
2214 hw_list);
2215 list_for_each_entry_continue(f, &head->hw_filters, hw_list) {
2216 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) {
2217 spin_unlock(&tp->lock);
2218 return f;
2219 }
2220 }
2221
2222 spin_unlock(&tp->lock);
2223 return NULL;
2224 }
2225
fl_reoffload(struct tcf_proto * tp,bool add,flow_setup_cb_t * cb,void * cb_priv,struct netlink_ext_ack * extack)2226 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb,
2227 void *cb_priv, struct netlink_ext_ack *extack)
2228 {
2229 struct tcf_block *block = tp->chain->block;
2230 struct flow_cls_offload cls_flower = {};
2231 struct cls_fl_filter *f = NULL;
2232 int err;
2233
2234 /* hw_filters list can only be changed by hw offload functions after
2235 * obtaining rtnl lock. Make sure it is not changed while reoffload is
2236 * iterating it.
2237 */
2238 ASSERT_RTNL();
2239
2240 while ((f = fl_get_next_hw_filter(tp, f, add))) {
2241 cls_flower.rule =
2242 flow_rule_alloc(tcf_exts_num_actions(&f->exts));
2243 if (!cls_flower.rule) {
2244 __fl_put(f);
2245 return -ENOMEM;
2246 }
2247
2248 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags,
2249 extack);
2250 cls_flower.command = add ?
2251 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY;
2252 cls_flower.cookie = (unsigned long)f;
2253 cls_flower.rule->match.dissector = &f->mask->dissector;
2254 cls_flower.rule->match.mask = &f->mask->key;
2255 cls_flower.rule->match.key = &f->mkey;
2256
2257 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts);
2258 if (err) {
2259 kfree(cls_flower.rule);
2260 if (tc_skip_sw(f->flags)) {
2261 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
2262 __fl_put(f);
2263 return err;
2264 }
2265 goto next_flow;
2266 }
2267
2268 cls_flower.classid = f->res.classid;
2269
2270 err = tc_setup_cb_reoffload(block, tp, add, cb,
2271 TC_SETUP_CLSFLOWER, &cls_flower,
2272 cb_priv, &f->flags,
2273 &f->in_hw_count);
2274 tc_cleanup_flow_action(&cls_flower.rule->action);
2275 kfree(cls_flower.rule);
2276
2277 if (err) {
2278 __fl_put(f);
2279 return err;
2280 }
2281 next_flow:
2282 __fl_put(f);
2283 }
2284
2285 return 0;
2286 }
2287
fl_hw_add(struct tcf_proto * tp,void * type_data)2288 static void fl_hw_add(struct tcf_proto *tp, void *type_data)
2289 {
2290 struct flow_cls_offload *cls_flower = type_data;
2291 struct cls_fl_filter *f =
2292 (struct cls_fl_filter *) cls_flower->cookie;
2293 struct cls_fl_head *head = fl_head_dereference(tp);
2294
2295 spin_lock(&tp->lock);
2296 list_add(&f->hw_list, &head->hw_filters);
2297 spin_unlock(&tp->lock);
2298 }
2299
fl_hw_del(struct tcf_proto * tp,void * type_data)2300 static void fl_hw_del(struct tcf_proto *tp, void *type_data)
2301 {
2302 struct flow_cls_offload *cls_flower = type_data;
2303 struct cls_fl_filter *f =
2304 (struct cls_fl_filter *) cls_flower->cookie;
2305
2306 spin_lock(&tp->lock);
2307 if (!list_empty(&f->hw_list))
2308 list_del_init(&f->hw_list);
2309 spin_unlock(&tp->lock);
2310 }
2311
fl_hw_create_tmplt(struct tcf_chain * chain,struct fl_flow_tmplt * tmplt)2312 static int fl_hw_create_tmplt(struct tcf_chain *chain,
2313 struct fl_flow_tmplt *tmplt)
2314 {
2315 struct flow_cls_offload cls_flower = {};
2316 struct tcf_block *block = chain->block;
2317
2318 cls_flower.rule = flow_rule_alloc(0);
2319 if (!cls_flower.rule)
2320 return -ENOMEM;
2321
2322 cls_flower.common.chain_index = chain->index;
2323 cls_flower.command = FLOW_CLS_TMPLT_CREATE;
2324 cls_flower.cookie = (unsigned long) tmplt;
2325 cls_flower.rule->match.dissector = &tmplt->dissector;
2326 cls_flower.rule->match.mask = &tmplt->mask;
2327 cls_flower.rule->match.key = &tmplt->dummy_key;
2328
2329 /* We don't care if driver (any of them) fails to handle this
2330 * call. It serves just as a hint for it.
2331 */
2332 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2333 kfree(cls_flower.rule);
2334
2335 return 0;
2336 }
2337
fl_hw_destroy_tmplt(struct tcf_chain * chain,struct fl_flow_tmplt * tmplt)2338 static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
2339 struct fl_flow_tmplt *tmplt)
2340 {
2341 struct flow_cls_offload cls_flower = {};
2342 struct tcf_block *block = chain->block;
2343
2344 cls_flower.common.chain_index = chain->index;
2345 cls_flower.command = FLOW_CLS_TMPLT_DESTROY;
2346 cls_flower.cookie = (unsigned long) tmplt;
2347
2348 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2349 }
2350
fl_tmplt_create(struct net * net,struct tcf_chain * chain,struct nlattr ** tca,struct netlink_ext_ack * extack)2351 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
2352 struct nlattr **tca,
2353 struct netlink_ext_ack *extack)
2354 {
2355 struct fl_flow_tmplt *tmplt;
2356 struct nlattr **tb;
2357 int err;
2358
2359 if (!tca[TCA_OPTIONS])
2360 return ERR_PTR(-EINVAL);
2361
2362 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
2363 if (!tb)
2364 return ERR_PTR(-ENOBUFS);
2365 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
2366 tca[TCA_OPTIONS], fl_policy, NULL);
2367 if (err)
2368 goto errout_tb;
2369
2370 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
2371 if (!tmplt) {
2372 err = -ENOMEM;
2373 goto errout_tb;
2374 }
2375 tmplt->chain = chain;
2376 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
2377 if (err)
2378 goto errout_tmplt;
2379
2380 fl_init_dissector(&tmplt->dissector, &tmplt->mask);
2381
2382 err = fl_hw_create_tmplt(chain, tmplt);
2383 if (err)
2384 goto errout_tmplt;
2385
2386 kfree(tb);
2387 return tmplt;
2388
2389 errout_tmplt:
2390 kfree(tmplt);
2391 errout_tb:
2392 kfree(tb);
2393 return ERR_PTR(err);
2394 }
2395
fl_tmplt_destroy(void * tmplt_priv)2396 static void fl_tmplt_destroy(void *tmplt_priv)
2397 {
2398 struct fl_flow_tmplt *tmplt = tmplt_priv;
2399
2400 fl_hw_destroy_tmplt(tmplt->chain, tmplt);
2401 kfree(tmplt);
2402 }
2403
fl_dump_key_val(struct sk_buff * skb,void * val,int val_type,void * mask,int mask_type,int len)2404 static int fl_dump_key_val(struct sk_buff *skb,
2405 void *val, int val_type,
2406 void *mask, int mask_type, int len)
2407 {
2408 int err;
2409
2410 if (!memchr_inv(mask, 0, len))
2411 return 0;
2412 err = nla_put(skb, val_type, len, val);
2413 if (err)
2414 return err;
2415 if (mask_type != TCA_FLOWER_UNSPEC) {
2416 err = nla_put(skb, mask_type, len, mask);
2417 if (err)
2418 return err;
2419 }
2420 return 0;
2421 }
2422
fl_dump_key_port_range(struct sk_buff * skb,struct fl_flow_key * key,struct fl_flow_key * mask)2423 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key,
2424 struct fl_flow_key *mask)
2425 {
2426 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst,
2427 TCA_FLOWER_KEY_PORT_DST_MIN,
2428 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC,
2429 sizeof(key->tp_range.tp_min.dst)) ||
2430 fl_dump_key_val(skb, &key->tp_range.tp_max.dst,
2431 TCA_FLOWER_KEY_PORT_DST_MAX,
2432 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC,
2433 sizeof(key->tp_range.tp_max.dst)) ||
2434 fl_dump_key_val(skb, &key->tp_range.tp_min.src,
2435 TCA_FLOWER_KEY_PORT_SRC_MIN,
2436 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC,
2437 sizeof(key->tp_range.tp_min.src)) ||
2438 fl_dump_key_val(skb, &key->tp_range.tp_max.src,
2439 TCA_FLOWER_KEY_PORT_SRC_MAX,
2440 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC,
2441 sizeof(key->tp_range.tp_max.src)))
2442 return -1;
2443
2444 return 0;
2445 }
2446
fl_dump_key_mpls_opt_lse(struct sk_buff * skb,struct flow_dissector_key_mpls * mpls_key,struct flow_dissector_key_mpls * mpls_mask,u8 lse_index)2447 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb,
2448 struct flow_dissector_key_mpls *mpls_key,
2449 struct flow_dissector_key_mpls *mpls_mask,
2450 u8 lse_index)
2451 {
2452 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index];
2453 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index];
2454 int err;
2455
2456 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH,
2457 lse_index + 1);
2458 if (err)
2459 return err;
2460
2461 if (lse_mask->mpls_ttl) {
2462 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL,
2463 lse_key->mpls_ttl);
2464 if (err)
2465 return err;
2466 }
2467 if (lse_mask->mpls_bos) {
2468 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS,
2469 lse_key->mpls_bos);
2470 if (err)
2471 return err;
2472 }
2473 if (lse_mask->mpls_tc) {
2474 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC,
2475 lse_key->mpls_tc);
2476 if (err)
2477 return err;
2478 }
2479 if (lse_mask->mpls_label) {
2480 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL,
2481 lse_key->mpls_label);
2482 if (err)
2483 return err;
2484 }
2485
2486 return 0;
2487 }
2488
fl_dump_key_mpls_opts(struct sk_buff * skb,struct flow_dissector_key_mpls * mpls_key,struct flow_dissector_key_mpls * mpls_mask)2489 static int fl_dump_key_mpls_opts(struct sk_buff *skb,
2490 struct flow_dissector_key_mpls *mpls_key,
2491 struct flow_dissector_key_mpls *mpls_mask)
2492 {
2493 struct nlattr *opts;
2494 struct nlattr *lse;
2495 u8 lse_index;
2496 int err;
2497
2498 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS);
2499 if (!opts)
2500 return -EMSGSIZE;
2501
2502 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) {
2503 if (!(mpls_mask->used_lses & 1 << lse_index))
2504 continue;
2505
2506 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE);
2507 if (!lse) {
2508 err = -EMSGSIZE;
2509 goto err_opts;
2510 }
2511
2512 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask,
2513 lse_index);
2514 if (err)
2515 goto err_opts_lse;
2516 nla_nest_end(skb, lse);
2517 }
2518 nla_nest_end(skb, opts);
2519
2520 return 0;
2521
2522 err_opts_lse:
2523 nla_nest_cancel(skb, lse);
2524 err_opts:
2525 nla_nest_cancel(skb, opts);
2526
2527 return err;
2528 }
2529
fl_dump_key_mpls(struct sk_buff * skb,struct flow_dissector_key_mpls * mpls_key,struct flow_dissector_key_mpls * mpls_mask)2530 static int fl_dump_key_mpls(struct sk_buff *skb,
2531 struct flow_dissector_key_mpls *mpls_key,
2532 struct flow_dissector_key_mpls *mpls_mask)
2533 {
2534 struct flow_dissector_mpls_lse *lse_mask;
2535 struct flow_dissector_mpls_lse *lse_key;
2536 int err;
2537
2538 if (!mpls_mask->used_lses)
2539 return 0;
2540
2541 lse_mask = &mpls_mask->ls[0];
2542 lse_key = &mpls_key->ls[0];
2543
2544 /* For backward compatibility, don't use the MPLS nested attributes if
2545 * the rule can be expressed using the old attributes.
2546 */
2547 if (mpls_mask->used_lses & ~1 ||
2548 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos &&
2549 !lse_mask->mpls_tc && !lse_mask->mpls_label))
2550 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask);
2551
2552 if (lse_mask->mpls_ttl) {
2553 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
2554 lse_key->mpls_ttl);
2555 if (err)
2556 return err;
2557 }
2558 if (lse_mask->mpls_tc) {
2559 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
2560 lse_key->mpls_tc);
2561 if (err)
2562 return err;
2563 }
2564 if (lse_mask->mpls_label) {
2565 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
2566 lse_key->mpls_label);
2567 if (err)
2568 return err;
2569 }
2570 if (lse_mask->mpls_bos) {
2571 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
2572 lse_key->mpls_bos);
2573 if (err)
2574 return err;
2575 }
2576 return 0;
2577 }
2578
fl_dump_key_ip(struct sk_buff * skb,bool encap,struct flow_dissector_key_ip * key,struct flow_dissector_key_ip * mask)2579 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
2580 struct flow_dissector_key_ip *key,
2581 struct flow_dissector_key_ip *mask)
2582 {
2583 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
2584 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
2585 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
2586 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
2587
2588 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
2589 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
2590 return -1;
2591
2592 return 0;
2593 }
2594
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)2595 static int fl_dump_key_vlan(struct sk_buff *skb,
2596 int vlan_id_key, int vlan_prio_key,
2597 struct flow_dissector_key_vlan *vlan_key,
2598 struct flow_dissector_key_vlan *vlan_mask)
2599 {
2600 int err;
2601
2602 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
2603 return 0;
2604 if (vlan_mask->vlan_id) {
2605 err = nla_put_u16(skb, vlan_id_key,
2606 vlan_key->vlan_id);
2607 if (err)
2608 return err;
2609 }
2610 if (vlan_mask->vlan_priority) {
2611 err = nla_put_u8(skb, vlan_prio_key,
2612 vlan_key->vlan_priority);
2613 if (err)
2614 return err;
2615 }
2616 return 0;
2617 }
2618
fl_get_key_flag(u32 dissector_key,u32 dissector_mask,u32 * flower_key,u32 * flower_mask,u32 flower_flag_bit,u32 dissector_flag_bit)2619 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
2620 u32 *flower_key, u32 *flower_mask,
2621 u32 flower_flag_bit, u32 dissector_flag_bit)
2622 {
2623 if (dissector_mask & dissector_flag_bit) {
2624 *flower_mask |= flower_flag_bit;
2625 if (dissector_key & dissector_flag_bit)
2626 *flower_key |= flower_flag_bit;
2627 }
2628 }
2629
fl_dump_key_flags(struct sk_buff * skb,u32 flags_key,u32 flags_mask)2630 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
2631 {
2632 u32 key, mask;
2633 __be32 _key, _mask;
2634 int err;
2635
2636 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
2637 return 0;
2638
2639 key = 0;
2640 mask = 0;
2641
2642 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2643 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
2644 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2645 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
2646 FLOW_DIS_FIRST_FRAG);
2647
2648 _key = cpu_to_be32(key);
2649 _mask = cpu_to_be32(mask);
2650
2651 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
2652 if (err)
2653 return err;
2654
2655 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
2656 }
2657
fl_dump_key_geneve_opt(struct sk_buff * skb,struct flow_dissector_key_enc_opts * enc_opts)2658 static int fl_dump_key_geneve_opt(struct sk_buff *skb,
2659 struct flow_dissector_key_enc_opts *enc_opts)
2660 {
2661 struct geneve_opt *opt;
2662 struct nlattr *nest;
2663 int opt_off = 0;
2664
2665 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
2666 if (!nest)
2667 goto nla_put_failure;
2668
2669 while (enc_opts->len > opt_off) {
2670 opt = (struct geneve_opt *)&enc_opts->data[opt_off];
2671
2672 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
2673 opt->opt_class))
2674 goto nla_put_failure;
2675 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
2676 opt->type))
2677 goto nla_put_failure;
2678 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
2679 opt->length * 4, opt->opt_data))
2680 goto nla_put_failure;
2681
2682 opt_off += sizeof(struct geneve_opt) + opt->length * 4;
2683 }
2684 nla_nest_end(skb, nest);
2685 return 0;
2686
2687 nla_put_failure:
2688 nla_nest_cancel(skb, nest);
2689 return -EMSGSIZE;
2690 }
2691
fl_dump_key_vxlan_opt(struct sk_buff * skb,struct flow_dissector_key_enc_opts * enc_opts)2692 static int fl_dump_key_vxlan_opt(struct sk_buff *skb,
2693 struct flow_dissector_key_enc_opts *enc_opts)
2694 {
2695 struct vxlan_metadata *md;
2696 struct nlattr *nest;
2697
2698 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN);
2699 if (!nest)
2700 goto nla_put_failure;
2701
2702 md = (struct vxlan_metadata *)&enc_opts->data[0];
2703 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp))
2704 goto nla_put_failure;
2705
2706 nla_nest_end(skb, nest);
2707 return 0;
2708
2709 nla_put_failure:
2710 nla_nest_cancel(skb, nest);
2711 return -EMSGSIZE;
2712 }
2713
fl_dump_key_erspan_opt(struct sk_buff * skb,struct flow_dissector_key_enc_opts * enc_opts)2714 static int fl_dump_key_erspan_opt(struct sk_buff *skb,
2715 struct flow_dissector_key_enc_opts *enc_opts)
2716 {
2717 struct erspan_metadata *md;
2718 struct nlattr *nest;
2719
2720 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN);
2721 if (!nest)
2722 goto nla_put_failure;
2723
2724 md = (struct erspan_metadata *)&enc_opts->data[0];
2725 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version))
2726 goto nla_put_failure;
2727
2728 if (md->version == 1 &&
2729 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index))
2730 goto nla_put_failure;
2731
2732 if (md->version == 2 &&
2733 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR,
2734 md->u.md2.dir) ||
2735 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID,
2736 get_hwid(&md->u.md2))))
2737 goto nla_put_failure;
2738
2739 nla_nest_end(skb, nest);
2740 return 0;
2741
2742 nla_put_failure:
2743 nla_nest_cancel(skb, nest);
2744 return -EMSGSIZE;
2745 }
2746
fl_dump_key_ct(struct sk_buff * skb,struct flow_dissector_key_ct * key,struct flow_dissector_key_ct * mask)2747 static int fl_dump_key_ct(struct sk_buff *skb,
2748 struct flow_dissector_key_ct *key,
2749 struct flow_dissector_key_ct *mask)
2750 {
2751 if (IS_ENABLED(CONFIG_NF_CONNTRACK) &&
2752 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
2753 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
2754 sizeof(key->ct_state)))
2755 goto nla_put_failure;
2756
2757 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
2758 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
2759 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
2760 sizeof(key->ct_zone)))
2761 goto nla_put_failure;
2762
2763 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
2764 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
2765 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
2766 sizeof(key->ct_mark)))
2767 goto nla_put_failure;
2768
2769 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
2770 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
2771 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
2772 sizeof(key->ct_labels)))
2773 goto nla_put_failure;
2774
2775 return 0;
2776
2777 nla_put_failure:
2778 return -EMSGSIZE;
2779 }
2780
fl_dump_key_options(struct sk_buff * skb,int enc_opt_type,struct flow_dissector_key_enc_opts * enc_opts)2781 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
2782 struct flow_dissector_key_enc_opts *enc_opts)
2783 {
2784 struct nlattr *nest;
2785 int err;
2786
2787 if (!enc_opts->len)
2788 return 0;
2789
2790 nest = nla_nest_start_noflag(skb, enc_opt_type);
2791 if (!nest)
2792 goto nla_put_failure;
2793
2794 switch (enc_opts->dst_opt_type) {
2795 case TUNNEL_GENEVE_OPT:
2796 err = fl_dump_key_geneve_opt(skb, enc_opts);
2797 if (err)
2798 goto nla_put_failure;
2799 break;
2800 case TUNNEL_VXLAN_OPT:
2801 err = fl_dump_key_vxlan_opt(skb, enc_opts);
2802 if (err)
2803 goto nla_put_failure;
2804 break;
2805 case TUNNEL_ERSPAN_OPT:
2806 err = fl_dump_key_erspan_opt(skb, enc_opts);
2807 if (err)
2808 goto nla_put_failure;
2809 break;
2810 default:
2811 goto nla_put_failure;
2812 }
2813 nla_nest_end(skb, nest);
2814 return 0;
2815
2816 nla_put_failure:
2817 nla_nest_cancel(skb, nest);
2818 return -EMSGSIZE;
2819 }
2820
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)2821 static int fl_dump_key_enc_opt(struct sk_buff *skb,
2822 struct flow_dissector_key_enc_opts *key_opts,
2823 struct flow_dissector_key_enc_opts *msk_opts)
2824 {
2825 int err;
2826
2827 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
2828 if (err)
2829 return err;
2830
2831 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
2832 }
2833
fl_dump_key(struct sk_buff * skb,struct net * net,struct fl_flow_key * key,struct fl_flow_key * mask)2834 static int fl_dump_key(struct sk_buff *skb, struct net *net,
2835 struct fl_flow_key *key, struct fl_flow_key *mask)
2836 {
2837 if (mask->meta.ingress_ifindex) {
2838 struct net_device *dev;
2839
2840 dev = __dev_get_by_index(net, key->meta.ingress_ifindex);
2841 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
2842 goto nla_put_failure;
2843 }
2844
2845 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
2846 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
2847 sizeof(key->eth.dst)) ||
2848 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
2849 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
2850 sizeof(key->eth.src)) ||
2851 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
2852 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
2853 sizeof(key->basic.n_proto)))
2854 goto nla_put_failure;
2855
2856 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
2857 goto nla_put_failure;
2858
2859 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
2860 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
2861 goto nla_put_failure;
2862
2863 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
2864 TCA_FLOWER_KEY_CVLAN_PRIO,
2865 &key->cvlan, &mask->cvlan) ||
2866 (mask->cvlan.vlan_tpid &&
2867 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
2868 key->cvlan.vlan_tpid)))
2869 goto nla_put_failure;
2870
2871 if (mask->basic.n_proto) {
2872 if (mask->cvlan.vlan_eth_type) {
2873 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
2874 key->basic.n_proto))
2875 goto nla_put_failure;
2876 } else if (mask->vlan.vlan_eth_type) {
2877 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
2878 key->vlan.vlan_eth_type))
2879 goto nla_put_failure;
2880 }
2881 }
2882
2883 if ((key->basic.n_proto == htons(ETH_P_IP) ||
2884 key->basic.n_proto == htons(ETH_P_IPV6)) &&
2885 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
2886 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
2887 sizeof(key->basic.ip_proto)) ||
2888 fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
2889 goto nla_put_failure;
2890
2891 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
2892 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
2893 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
2894 sizeof(key->ipv4.src)) ||
2895 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
2896 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
2897 sizeof(key->ipv4.dst))))
2898 goto nla_put_failure;
2899 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
2900 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
2901 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
2902 sizeof(key->ipv6.src)) ||
2903 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
2904 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
2905 sizeof(key->ipv6.dst))))
2906 goto nla_put_failure;
2907
2908 if (key->basic.ip_proto == IPPROTO_TCP &&
2909 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
2910 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
2911 sizeof(key->tp.src)) ||
2912 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
2913 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
2914 sizeof(key->tp.dst)) ||
2915 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
2916 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
2917 sizeof(key->tcp.flags))))
2918 goto nla_put_failure;
2919 else if (key->basic.ip_proto == IPPROTO_UDP &&
2920 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
2921 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
2922 sizeof(key->tp.src)) ||
2923 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
2924 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
2925 sizeof(key->tp.dst))))
2926 goto nla_put_failure;
2927 else if (key->basic.ip_proto == IPPROTO_SCTP &&
2928 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
2929 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
2930 sizeof(key->tp.src)) ||
2931 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
2932 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
2933 sizeof(key->tp.dst))))
2934 goto nla_put_failure;
2935 else if (key->basic.n_proto == htons(ETH_P_IP) &&
2936 key->basic.ip_proto == IPPROTO_ICMP &&
2937 (fl_dump_key_val(skb, &key->icmp.type,
2938 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
2939 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
2940 sizeof(key->icmp.type)) ||
2941 fl_dump_key_val(skb, &key->icmp.code,
2942 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
2943 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
2944 sizeof(key->icmp.code))))
2945 goto nla_put_failure;
2946 else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
2947 key->basic.ip_proto == IPPROTO_ICMPV6 &&
2948 (fl_dump_key_val(skb, &key->icmp.type,
2949 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
2950 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
2951 sizeof(key->icmp.type)) ||
2952 fl_dump_key_val(skb, &key->icmp.code,
2953 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
2954 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
2955 sizeof(key->icmp.code))))
2956 goto nla_put_failure;
2957 else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
2958 key->basic.n_proto == htons(ETH_P_RARP)) &&
2959 (fl_dump_key_val(skb, &key->arp.sip,
2960 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
2961 TCA_FLOWER_KEY_ARP_SIP_MASK,
2962 sizeof(key->arp.sip)) ||
2963 fl_dump_key_val(skb, &key->arp.tip,
2964 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
2965 TCA_FLOWER_KEY_ARP_TIP_MASK,
2966 sizeof(key->arp.tip)) ||
2967 fl_dump_key_val(skb, &key->arp.op,
2968 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
2969 TCA_FLOWER_KEY_ARP_OP_MASK,
2970 sizeof(key->arp.op)) ||
2971 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
2972 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
2973 sizeof(key->arp.sha)) ||
2974 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
2975 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
2976 sizeof(key->arp.tha))))
2977 goto nla_put_failure;
2978
2979 if ((key->basic.ip_proto == IPPROTO_TCP ||
2980 key->basic.ip_proto == IPPROTO_UDP ||
2981 key->basic.ip_proto == IPPROTO_SCTP) &&
2982 fl_dump_key_port_range(skb, key, mask))
2983 goto nla_put_failure;
2984
2985 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
2986 (fl_dump_key_val(skb, &key->enc_ipv4.src,
2987 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
2988 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
2989 sizeof(key->enc_ipv4.src)) ||
2990 fl_dump_key_val(skb, &key->enc_ipv4.dst,
2991 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
2992 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
2993 sizeof(key->enc_ipv4.dst))))
2994 goto nla_put_failure;
2995 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
2996 (fl_dump_key_val(skb, &key->enc_ipv6.src,
2997 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
2998 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
2999 sizeof(key->enc_ipv6.src)) ||
3000 fl_dump_key_val(skb, &key->enc_ipv6.dst,
3001 TCA_FLOWER_KEY_ENC_IPV6_DST,
3002 &mask->enc_ipv6.dst,
3003 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
3004 sizeof(key->enc_ipv6.dst))))
3005 goto nla_put_failure;
3006
3007 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
3008 &mask->enc_key_id, TCA_FLOWER_UNSPEC,
3009 sizeof(key->enc_key_id)) ||
3010 fl_dump_key_val(skb, &key->enc_tp.src,
3011 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
3012 &mask->enc_tp.src,
3013 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
3014 sizeof(key->enc_tp.src)) ||
3015 fl_dump_key_val(skb, &key->enc_tp.dst,
3016 TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
3017 &mask->enc_tp.dst,
3018 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
3019 sizeof(key->enc_tp.dst)) ||
3020 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
3021 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
3022 goto nla_put_failure;
3023
3024 if (fl_dump_key_ct(skb, &key->ct, &mask->ct))
3025 goto nla_put_failure;
3026
3027 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
3028 goto nla_put_failure;
3029
3030 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
3031 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
3032 sizeof(key->hash.hash)))
3033 goto nla_put_failure;
3034
3035 return 0;
3036
3037 nla_put_failure:
3038 return -EMSGSIZE;
3039 }
3040
fl_dump(struct net * net,struct tcf_proto * tp,void * fh,struct sk_buff * skb,struct tcmsg * t,bool rtnl_held)3041 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
3042 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3043 {
3044 struct cls_fl_filter *f = fh;
3045 struct nlattr *nest;
3046 struct fl_flow_key *key, *mask;
3047 bool skip_hw;
3048
3049 if (!f)
3050 return skb->len;
3051
3052 t->tcm_handle = f->handle;
3053
3054 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3055 if (!nest)
3056 goto nla_put_failure;
3057
3058 spin_lock(&tp->lock);
3059
3060 if (f->res.classid &&
3061 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
3062 goto nla_put_failure_locked;
3063
3064 key = &f->key;
3065 mask = &f->mask->key;
3066 skip_hw = tc_skip_hw(f->flags);
3067
3068 if (fl_dump_key(skb, net, key, mask))
3069 goto nla_put_failure_locked;
3070
3071 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3072 goto nla_put_failure_locked;
3073
3074 spin_unlock(&tp->lock);
3075
3076 if (!skip_hw)
3077 fl_hw_update_stats(tp, f, rtnl_held);
3078
3079 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count))
3080 goto nla_put_failure;
3081
3082 if (tcf_exts_dump(skb, &f->exts))
3083 goto nla_put_failure;
3084
3085 nla_nest_end(skb, nest);
3086
3087 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
3088 goto nla_put_failure;
3089
3090 return skb->len;
3091
3092 nla_put_failure_locked:
3093 spin_unlock(&tp->lock);
3094 nla_put_failure:
3095 nla_nest_cancel(skb, nest);
3096 return -1;
3097 }
3098
fl_terse_dump(struct net * net,struct tcf_proto * tp,void * fh,struct sk_buff * skb,struct tcmsg * t,bool rtnl_held)3099 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh,
3100 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3101 {
3102 struct cls_fl_filter *f = fh;
3103 struct nlattr *nest;
3104 bool skip_hw;
3105
3106 if (!f)
3107 return skb->len;
3108
3109 t->tcm_handle = f->handle;
3110
3111 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3112 if (!nest)
3113 goto nla_put_failure;
3114
3115 spin_lock(&tp->lock);
3116
3117 skip_hw = tc_skip_hw(f->flags);
3118
3119 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3120 goto nla_put_failure_locked;
3121
3122 spin_unlock(&tp->lock);
3123
3124 if (!skip_hw)
3125 fl_hw_update_stats(tp, f, rtnl_held);
3126
3127 if (tcf_exts_terse_dump(skb, &f->exts))
3128 goto nla_put_failure;
3129
3130 nla_nest_end(skb, nest);
3131
3132 return skb->len;
3133
3134 nla_put_failure_locked:
3135 spin_unlock(&tp->lock);
3136 nla_put_failure:
3137 nla_nest_cancel(skb, nest);
3138 return -1;
3139 }
3140
fl_tmplt_dump(struct sk_buff * skb,struct net * net,void * tmplt_priv)3141 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
3142 {
3143 struct fl_flow_tmplt *tmplt = tmplt_priv;
3144 struct fl_flow_key *key, *mask;
3145 struct nlattr *nest;
3146
3147 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3148 if (!nest)
3149 goto nla_put_failure;
3150
3151 key = &tmplt->dummy_key;
3152 mask = &tmplt->mask;
3153
3154 if (fl_dump_key(skb, net, key, mask))
3155 goto nla_put_failure;
3156
3157 nla_nest_end(skb, nest);
3158
3159 return skb->len;
3160
3161 nla_put_failure:
3162 nla_nest_cancel(skb, nest);
3163 return -EMSGSIZE;
3164 }
3165
fl_bind_class(void * fh,u32 classid,unsigned long cl,void * q,unsigned long base)3166 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q,
3167 unsigned long base)
3168 {
3169 struct cls_fl_filter *f = fh;
3170
3171 if (f && f->res.classid == classid) {
3172 if (cl)
3173 __tcf_bind_filter(q, &f->res, base);
3174 else
3175 __tcf_unbind_filter(q, &f->res);
3176 }
3177 }
3178
fl_delete_empty(struct tcf_proto * tp)3179 static bool fl_delete_empty(struct tcf_proto *tp)
3180 {
3181 struct cls_fl_head *head = fl_head_dereference(tp);
3182
3183 spin_lock(&tp->lock);
3184 tp->deleting = idr_is_empty(&head->handle_idr);
3185 spin_unlock(&tp->lock);
3186
3187 return tp->deleting;
3188 }
3189
3190 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
3191 .kind = "flower",
3192 .classify = fl_classify,
3193 .init = fl_init,
3194 .destroy = fl_destroy,
3195 .get = fl_get,
3196 .put = fl_put,
3197 .change = fl_change,
3198 .delete = fl_delete,
3199 .delete_empty = fl_delete_empty,
3200 .walk = fl_walk,
3201 .reoffload = fl_reoffload,
3202 .hw_add = fl_hw_add,
3203 .hw_del = fl_hw_del,
3204 .dump = fl_dump,
3205 .terse_dump = fl_terse_dump,
3206 .bind_class = fl_bind_class,
3207 .tmplt_create = fl_tmplt_create,
3208 .tmplt_destroy = fl_tmplt_destroy,
3209 .tmplt_dump = fl_tmplt_dump,
3210 .owner = THIS_MODULE,
3211 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED,
3212 };
3213
cls_fl_init(void)3214 static int __init cls_fl_init(void)
3215 {
3216 return register_tcf_proto_ops(&cls_fl_ops);
3217 }
3218
cls_fl_exit(void)3219 static void __exit cls_fl_exit(void)
3220 {
3221 unregister_tcf_proto_ops(&cls_fl_ops);
3222 }
3223
3224 module_init(cls_fl_init);
3225 module_exit(cls_fl_exit);
3226
3227 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3228 MODULE_DESCRIPTION("Flower classifier");
3229 MODULE_LICENSE("GPL v2");
3230