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,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 struct flow_dissector_key_vlan *key_val,
1002 struct flow_dissector_key_vlan *key_mask)
1003 {
1004 #define VLAN_PRIORITY_MASK 0x7
1005
1006 if (tb[vlan_id_key]) {
1007 key_val->vlan_id =
1008 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
1009 key_mask->vlan_id = VLAN_VID_MASK;
1010 }
1011 if (tb[vlan_prio_key]) {
1012 key_val->vlan_priority =
1013 nla_get_u8(tb[vlan_prio_key]) &
1014 VLAN_PRIORITY_MASK;
1015 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
1016 }
1017 key_val->vlan_tpid = ethertype;
1018 key_mask->vlan_tpid = cpu_to_be16(~0);
1019 }
1020
fl_set_key_flag(u32 flower_key,u32 flower_mask,u32 * dissector_key,u32 * dissector_mask,u32 flower_flag_bit,u32 dissector_flag_bit)1021 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
1022 u32 *dissector_key, u32 *dissector_mask,
1023 u32 flower_flag_bit, u32 dissector_flag_bit)
1024 {
1025 if (flower_mask & flower_flag_bit) {
1026 *dissector_mask |= dissector_flag_bit;
1027 if (flower_key & flower_flag_bit)
1028 *dissector_key |= dissector_flag_bit;
1029 }
1030 }
1031
fl_set_key_flags(struct nlattr ** tb,u32 * flags_key,u32 * flags_mask,struct netlink_ext_ack * extack)1032 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key,
1033 u32 *flags_mask, struct netlink_ext_ack *extack)
1034 {
1035 u32 key, mask;
1036
1037 /* mask is mandatory for flags */
1038 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) {
1039 NL_SET_ERR_MSG(extack, "Missing flags mask");
1040 return -EINVAL;
1041 }
1042
1043 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
1044 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
1045
1046 *flags_key = 0;
1047 *flags_mask = 0;
1048
1049 fl_set_key_flag(key, mask, flags_key, flags_mask,
1050 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1051 fl_set_key_flag(key, mask, flags_key, flags_mask,
1052 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1053 FLOW_DIS_FIRST_FRAG);
1054
1055 return 0;
1056 }
1057
fl_set_key_ip(struct nlattr ** tb,bool encap,struct flow_dissector_key_ip * key,struct flow_dissector_key_ip * mask)1058 static void fl_set_key_ip(struct nlattr **tb, bool encap,
1059 struct flow_dissector_key_ip *key,
1060 struct flow_dissector_key_ip *mask)
1061 {
1062 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
1063 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
1064 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
1065 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
1066
1067 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
1068 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
1069 }
1070
fl_set_geneve_opt(const struct nlattr * nla,struct fl_flow_key * key,int depth,int option_len,struct netlink_ext_ack * extack)1071 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
1072 int depth, int option_len,
1073 struct netlink_ext_ack *extack)
1074 {
1075 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
1076 struct nlattr *class = NULL, *type = NULL, *data = NULL;
1077 struct geneve_opt *opt;
1078 int err, data_len = 0;
1079
1080 if (option_len > sizeof(struct geneve_opt))
1081 data_len = option_len - sizeof(struct geneve_opt);
1082
1083 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
1084 memset(opt, 0xff, option_len);
1085 opt->length = data_len / 4;
1086 opt->r1 = 0;
1087 opt->r2 = 0;
1088 opt->r3 = 0;
1089
1090 /* If no mask has been prodived we assume an exact match. */
1091 if (!depth)
1092 return sizeof(struct geneve_opt) + data_len;
1093
1094 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
1095 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
1096 return -EINVAL;
1097 }
1098
1099 err = nla_parse_nested_deprecated(tb,
1100 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
1101 nla, geneve_opt_policy, extack);
1102 if (err < 0)
1103 return err;
1104
1105 /* We are not allowed to omit any of CLASS, TYPE or DATA
1106 * fields from the key.
1107 */
1108 if (!option_len &&
1109 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
1110 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
1111 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
1112 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
1113 return -EINVAL;
1114 }
1115
1116 /* Omitting any of CLASS, TYPE or DATA fields is allowed
1117 * for the mask.
1118 */
1119 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
1120 int new_len = key->enc_opts.len;
1121
1122 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
1123 data_len = nla_len(data);
1124 if (data_len < 4) {
1125 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
1126 return -ERANGE;
1127 }
1128 if (data_len % 4) {
1129 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
1130 return -ERANGE;
1131 }
1132
1133 new_len += sizeof(struct geneve_opt) + data_len;
1134 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
1135 if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
1136 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
1137 return -ERANGE;
1138 }
1139 opt->length = data_len / 4;
1140 memcpy(opt->opt_data, nla_data(data), data_len);
1141 }
1142
1143 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
1144 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
1145 opt->opt_class = nla_get_be16(class);
1146 }
1147
1148 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
1149 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
1150 opt->type = nla_get_u8(type);
1151 }
1152
1153 return sizeof(struct geneve_opt) + data_len;
1154 }
1155
fl_set_vxlan_opt(const struct nlattr * nla,struct fl_flow_key * key,int depth,int option_len,struct netlink_ext_ack * extack)1156 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1157 int depth, int option_len,
1158 struct netlink_ext_ack *extack)
1159 {
1160 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1];
1161 struct vxlan_metadata *md;
1162 int err;
1163
1164 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1165 memset(md, 0xff, sizeof(*md));
1166
1167 if (!depth)
1168 return sizeof(*md);
1169
1170 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) {
1171 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask");
1172 return -EINVAL;
1173 }
1174
1175 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla,
1176 vxlan_opt_policy, extack);
1177 if (err < 0)
1178 return err;
1179
1180 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1181 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp");
1182 return -EINVAL;
1183 }
1184
1185 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1186 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]);
1187 md->gbp &= VXLAN_GBP_MASK;
1188 }
1189
1190 return sizeof(*md);
1191 }
1192
fl_set_erspan_opt(const struct nlattr * nla,struct fl_flow_key * key,int depth,int option_len,struct netlink_ext_ack * extack)1193 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1194 int depth, int option_len,
1195 struct netlink_ext_ack *extack)
1196 {
1197 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1];
1198 struct erspan_metadata *md;
1199 int err;
1200
1201 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1202 memset(md, 0xff, sizeof(*md));
1203 md->version = 1;
1204
1205 if (!depth)
1206 return sizeof(*md);
1207
1208 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) {
1209 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask");
1210 return -EINVAL;
1211 }
1212
1213 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla,
1214 erspan_opt_policy, extack);
1215 if (err < 0)
1216 return err;
1217
1218 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) {
1219 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver");
1220 return -EINVAL;
1221 }
1222
1223 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER])
1224 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]);
1225
1226 if (md->version == 1) {
1227 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1228 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index");
1229 return -EINVAL;
1230 }
1231 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1232 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX];
1233 memset(&md->u, 0x00, sizeof(md->u));
1234 md->u.index = nla_get_be32(nla);
1235 }
1236 } else if (md->version == 2) {
1237 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] ||
1238 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) {
1239 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid");
1240 return -EINVAL;
1241 }
1242 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) {
1243 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR];
1244 md->u.md2.dir = nla_get_u8(nla);
1245 }
1246 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) {
1247 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID];
1248 set_hwid(&md->u.md2, nla_get_u8(nla));
1249 }
1250 } else {
1251 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect");
1252 return -EINVAL;
1253 }
1254
1255 return sizeof(*md);
1256 }
1257
fl_set_enc_opt(struct nlattr ** tb,struct fl_flow_key * key,struct fl_flow_key * mask,struct netlink_ext_ack * extack)1258 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
1259 struct fl_flow_key *mask,
1260 struct netlink_ext_ack *extack)
1261 {
1262 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
1263 int err, option_len, key_depth, msk_depth = 0;
1264
1265 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS],
1266 TCA_FLOWER_KEY_ENC_OPTS_MAX,
1267 enc_opts_policy, extack);
1268 if (err)
1269 return err;
1270
1271 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
1272
1273 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
1274 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
1275 TCA_FLOWER_KEY_ENC_OPTS_MAX,
1276 enc_opts_policy, extack);
1277 if (err)
1278 return err;
1279
1280 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1281 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1282 if (!nla_ok(nla_opt_msk, msk_depth)) {
1283 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks");
1284 return -EINVAL;
1285 }
1286 }
1287
1288 nla_for_each_attr(nla_opt_key, nla_enc_key,
1289 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
1290 switch (nla_type(nla_opt_key)) {
1291 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
1292 if (key->enc_opts.dst_opt_type &&
1293 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) {
1294 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options");
1295 return -EINVAL;
1296 }
1297 option_len = 0;
1298 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1299 option_len = fl_set_geneve_opt(nla_opt_key, key,
1300 key_depth, option_len,
1301 extack);
1302 if (option_len < 0)
1303 return option_len;
1304
1305 key->enc_opts.len += option_len;
1306 /* At the same time we need to parse through the mask
1307 * in order to verify exact and mask attribute lengths.
1308 */
1309 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1310 option_len = fl_set_geneve_opt(nla_opt_msk, mask,
1311 msk_depth, option_len,
1312 extack);
1313 if (option_len < 0)
1314 return option_len;
1315
1316 mask->enc_opts.len += option_len;
1317 if (key->enc_opts.len != mask->enc_opts.len) {
1318 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1319 return -EINVAL;
1320 }
1321 break;
1322 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN:
1323 if (key->enc_opts.dst_opt_type) {
1324 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options");
1325 return -EINVAL;
1326 }
1327 option_len = 0;
1328 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1329 option_len = fl_set_vxlan_opt(nla_opt_key, key,
1330 key_depth, option_len,
1331 extack);
1332 if (option_len < 0)
1333 return option_len;
1334
1335 key->enc_opts.len += option_len;
1336 /* At the same time we need to parse through the mask
1337 * in order to verify exact and mask attribute lengths.
1338 */
1339 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1340 option_len = fl_set_vxlan_opt(nla_opt_msk, mask,
1341 msk_depth, option_len,
1342 extack);
1343 if (option_len < 0)
1344 return option_len;
1345
1346 mask->enc_opts.len += option_len;
1347 if (key->enc_opts.len != mask->enc_opts.len) {
1348 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1349 return -EINVAL;
1350 }
1351 break;
1352 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN:
1353 if (key->enc_opts.dst_opt_type) {
1354 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options");
1355 return -EINVAL;
1356 }
1357 option_len = 0;
1358 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1359 option_len = fl_set_erspan_opt(nla_opt_key, key,
1360 key_depth, option_len,
1361 extack);
1362 if (option_len < 0)
1363 return option_len;
1364
1365 key->enc_opts.len += option_len;
1366 /* At the same time we need to parse through the mask
1367 * in order to verify exact and mask attribute lengths.
1368 */
1369 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1370 option_len = fl_set_erspan_opt(nla_opt_msk, mask,
1371 msk_depth, option_len,
1372 extack);
1373 if (option_len < 0)
1374 return option_len;
1375
1376 mask->enc_opts.len += option_len;
1377 if (key->enc_opts.len != mask->enc_opts.len) {
1378 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1379 return -EINVAL;
1380 }
1381 break;
1382 default:
1383 NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
1384 return -EINVAL;
1385 }
1386
1387 if (!msk_depth)
1388 continue;
1389
1390 if (!nla_ok(nla_opt_msk, msk_depth)) {
1391 NL_SET_ERR_MSG(extack, "A mask attribute is invalid");
1392 return -EINVAL;
1393 }
1394 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
1395 }
1396
1397 return 0;
1398 }
1399
fl_validate_ct_state(u16 state,struct nlattr * tb,struct netlink_ext_ack * extack)1400 static int fl_validate_ct_state(u16 state, struct nlattr *tb,
1401 struct netlink_ext_ack *extack)
1402 {
1403 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) {
1404 NL_SET_ERR_MSG_ATTR(extack, tb,
1405 "no trk, so no other flag can be set");
1406 return -EINVAL;
1407 }
1408
1409 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW &&
1410 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) {
1411 NL_SET_ERR_MSG_ATTR(extack, tb,
1412 "new and est are mutually exclusive");
1413 return -EINVAL;
1414 }
1415
1416 return 0;
1417 }
1418
fl_set_key_ct(struct nlattr ** tb,struct flow_dissector_key_ct * key,struct flow_dissector_key_ct * mask,struct netlink_ext_ack * extack)1419 static int fl_set_key_ct(struct nlattr **tb,
1420 struct flow_dissector_key_ct *key,
1421 struct flow_dissector_key_ct *mask,
1422 struct netlink_ext_ack *extack)
1423 {
1424 if (tb[TCA_FLOWER_KEY_CT_STATE]) {
1425 int err;
1426
1427 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) {
1428 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled");
1429 return -EOPNOTSUPP;
1430 }
1431 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
1432 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
1433 sizeof(key->ct_state));
1434
1435 err = fl_validate_ct_state(key->ct_state & mask->ct_state,
1436 tb[TCA_FLOWER_KEY_CT_STATE_MASK],
1437 extack);
1438 if (err)
1439 return err;
1440
1441 }
1442 if (tb[TCA_FLOWER_KEY_CT_ZONE]) {
1443 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
1444 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled");
1445 return -EOPNOTSUPP;
1446 }
1447 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
1448 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
1449 sizeof(key->ct_zone));
1450 }
1451 if (tb[TCA_FLOWER_KEY_CT_MARK]) {
1452 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
1453 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled");
1454 return -EOPNOTSUPP;
1455 }
1456 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
1457 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
1458 sizeof(key->ct_mark));
1459 }
1460 if (tb[TCA_FLOWER_KEY_CT_LABELS]) {
1461 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
1462 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled");
1463 return -EOPNOTSUPP;
1464 }
1465 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
1466 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
1467 sizeof(key->ct_labels));
1468 }
1469
1470 return 0;
1471 }
1472
fl_set_key(struct net * net,struct nlattr ** tb,struct fl_flow_key * key,struct fl_flow_key * mask,struct netlink_ext_ack * extack)1473 static int fl_set_key(struct net *net, struct nlattr **tb,
1474 struct fl_flow_key *key, struct fl_flow_key *mask,
1475 struct netlink_ext_ack *extack)
1476 {
1477 __be16 ethertype;
1478 int ret = 0;
1479
1480 if (tb[TCA_FLOWER_INDEV]) {
1481 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
1482 if (err < 0)
1483 return err;
1484 key->meta.ingress_ifindex = err;
1485 mask->meta.ingress_ifindex = 0xffffffff;
1486 }
1487
1488 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1489 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1490 sizeof(key->eth.dst));
1491 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1492 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1493 sizeof(key->eth.src));
1494
1495 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
1496 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
1497
1498 if (eth_type_vlan(ethertype)) {
1499 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
1500 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan,
1501 &mask->vlan);
1502
1503 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) {
1504 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]);
1505 if (eth_type_vlan(ethertype)) {
1506 fl_set_key_vlan(tb, ethertype,
1507 TCA_FLOWER_KEY_CVLAN_ID,
1508 TCA_FLOWER_KEY_CVLAN_PRIO,
1509 &key->cvlan, &mask->cvlan);
1510 fl_set_key_val(tb, &key->basic.n_proto,
1511 TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1512 &mask->basic.n_proto,
1513 TCA_FLOWER_UNSPEC,
1514 sizeof(key->basic.n_proto));
1515 } else {
1516 key->basic.n_proto = ethertype;
1517 mask->basic.n_proto = cpu_to_be16(~0);
1518 }
1519 }
1520 } else {
1521 key->basic.n_proto = ethertype;
1522 mask->basic.n_proto = cpu_to_be16(~0);
1523 }
1524 }
1525
1526 if (key->basic.n_proto == htons(ETH_P_IP) ||
1527 key->basic.n_proto == htons(ETH_P_IPV6)) {
1528 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1529 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1530 sizeof(key->basic.ip_proto));
1531 fl_set_key_ip(tb, false, &key->ip, &mask->ip);
1532 }
1533
1534 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
1535 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1536 mask->control.addr_type = ~0;
1537 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1538 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1539 sizeof(key->ipv4.src));
1540 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1541 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1542 sizeof(key->ipv4.dst));
1543 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
1544 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1545 mask->control.addr_type = ~0;
1546 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1547 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1548 sizeof(key->ipv6.src));
1549 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1550 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1551 sizeof(key->ipv6.dst));
1552 }
1553
1554 if (key->basic.ip_proto == IPPROTO_TCP) {
1555 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1556 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1557 sizeof(key->tp.src));
1558 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1559 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1560 sizeof(key->tp.dst));
1561 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1562 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1563 sizeof(key->tcp.flags));
1564 } else if (key->basic.ip_proto == IPPROTO_UDP) {
1565 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1566 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1567 sizeof(key->tp.src));
1568 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1569 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1570 sizeof(key->tp.dst));
1571 } else if (key->basic.ip_proto == IPPROTO_SCTP) {
1572 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1573 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1574 sizeof(key->tp.src));
1575 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1576 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1577 sizeof(key->tp.dst));
1578 } else if (key->basic.n_proto == htons(ETH_P_IP) &&
1579 key->basic.ip_proto == IPPROTO_ICMP) {
1580 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
1581 &mask->icmp.type,
1582 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1583 sizeof(key->icmp.type));
1584 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
1585 &mask->icmp.code,
1586 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1587 sizeof(key->icmp.code));
1588 } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1589 key->basic.ip_proto == IPPROTO_ICMPV6) {
1590 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
1591 &mask->icmp.type,
1592 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1593 sizeof(key->icmp.type));
1594 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
1595 &mask->icmp.code,
1596 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1597 sizeof(key->icmp.code));
1598 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
1599 key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
1600 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack);
1601 if (ret)
1602 return ret;
1603 } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
1604 key->basic.n_proto == htons(ETH_P_RARP)) {
1605 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
1606 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
1607 sizeof(key->arp.sip));
1608 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
1609 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
1610 sizeof(key->arp.tip));
1611 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
1612 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
1613 sizeof(key->arp.op));
1614 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1615 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1616 sizeof(key->arp.sha));
1617 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1618 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1619 sizeof(key->arp.tha));
1620 }
1621
1622 if (key->basic.ip_proto == IPPROTO_TCP ||
1623 key->basic.ip_proto == IPPROTO_UDP ||
1624 key->basic.ip_proto == IPPROTO_SCTP) {
1625 ret = fl_set_key_port_range(tb, key, mask, extack);
1626 if (ret)
1627 return ret;
1628 }
1629
1630 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
1631 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
1632 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1633 mask->enc_control.addr_type = ~0;
1634 fl_set_key_val(tb, &key->enc_ipv4.src,
1635 TCA_FLOWER_KEY_ENC_IPV4_SRC,
1636 &mask->enc_ipv4.src,
1637 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1638 sizeof(key->enc_ipv4.src));
1639 fl_set_key_val(tb, &key->enc_ipv4.dst,
1640 TCA_FLOWER_KEY_ENC_IPV4_DST,
1641 &mask->enc_ipv4.dst,
1642 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1643 sizeof(key->enc_ipv4.dst));
1644 }
1645
1646 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
1647 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
1648 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1649 mask->enc_control.addr_type = ~0;
1650 fl_set_key_val(tb, &key->enc_ipv6.src,
1651 TCA_FLOWER_KEY_ENC_IPV6_SRC,
1652 &mask->enc_ipv6.src,
1653 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1654 sizeof(key->enc_ipv6.src));
1655 fl_set_key_val(tb, &key->enc_ipv6.dst,
1656 TCA_FLOWER_KEY_ENC_IPV6_DST,
1657 &mask->enc_ipv6.dst,
1658 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1659 sizeof(key->enc_ipv6.dst));
1660 }
1661
1662 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
1663 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
1664 sizeof(key->enc_key_id.keyid));
1665
1666 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1667 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1668 sizeof(key->enc_tp.src));
1669
1670 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1671 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1672 sizeof(key->enc_tp.dst));
1673
1674 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
1675
1676 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
1677 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
1678 sizeof(key->hash.hash));
1679
1680 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
1681 ret = fl_set_enc_opt(tb, key, mask, extack);
1682 if (ret)
1683 return ret;
1684 }
1685
1686 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack);
1687 if (ret)
1688 return ret;
1689
1690 if (tb[TCA_FLOWER_KEY_FLAGS])
1691 ret = fl_set_key_flags(tb, &key->control.flags,
1692 &mask->control.flags, extack);
1693
1694 return ret;
1695 }
1696
fl_mask_copy(struct fl_flow_mask * dst,struct fl_flow_mask * src)1697 static void fl_mask_copy(struct fl_flow_mask *dst,
1698 struct fl_flow_mask *src)
1699 {
1700 const void *psrc = fl_key_get_start(&src->key, src);
1701 void *pdst = fl_key_get_start(&dst->key, src);
1702
1703 memcpy(pdst, psrc, fl_mask_range(src));
1704 dst->range = src->range;
1705 }
1706
1707 static const struct rhashtable_params fl_ht_params = {
1708 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
1709 .head_offset = offsetof(struct cls_fl_filter, ht_node),
1710 .automatic_shrinking = true,
1711 };
1712
fl_init_mask_hashtable(struct fl_flow_mask * mask)1713 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
1714 {
1715 mask->filter_ht_params = fl_ht_params;
1716 mask->filter_ht_params.key_len = fl_mask_range(mask);
1717 mask->filter_ht_params.key_offset += mask->range.start;
1718
1719 return rhashtable_init(&mask->ht, &mask->filter_ht_params);
1720 }
1721
1722 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
1723 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member)
1724
1725 #define FL_KEY_IS_MASKED(mask, member) \
1726 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
1727 0, FL_KEY_MEMBER_SIZE(member)) \
1728
1729 #define FL_KEY_SET(keys, cnt, id, member) \
1730 do { \
1731 keys[cnt].key_id = id; \
1732 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
1733 cnt++; \
1734 } while(0);
1735
1736 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
1737 do { \
1738 if (FL_KEY_IS_MASKED(mask, member)) \
1739 FL_KEY_SET(keys, cnt, id, member); \
1740 } while(0);
1741
fl_init_dissector(struct flow_dissector * dissector,struct fl_flow_key * mask)1742 static void fl_init_dissector(struct flow_dissector *dissector,
1743 struct fl_flow_key *mask)
1744 {
1745 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
1746 size_t cnt = 0;
1747
1748 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1749 FLOW_DISSECTOR_KEY_META, meta);
1750 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
1751 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
1752 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1753 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
1754 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1755 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
1756 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1757 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
1758 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1759 FLOW_DISSECTOR_KEY_PORTS, tp);
1760 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1761 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range);
1762 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1763 FLOW_DISSECTOR_KEY_IP, ip);
1764 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1765 FLOW_DISSECTOR_KEY_TCP, tcp);
1766 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1767 FLOW_DISSECTOR_KEY_ICMP, icmp);
1768 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1769 FLOW_DISSECTOR_KEY_ARP, arp);
1770 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1771 FLOW_DISSECTOR_KEY_MPLS, mpls);
1772 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1773 FLOW_DISSECTOR_KEY_VLAN, vlan);
1774 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1775 FLOW_DISSECTOR_KEY_CVLAN, cvlan);
1776 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1777 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
1778 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1779 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
1780 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1781 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
1782 if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
1783 FL_KEY_IS_MASKED(mask, enc_ipv6))
1784 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
1785 enc_control);
1786 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1787 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
1788 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1789 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
1790 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1791 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
1792 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1793 FLOW_DISSECTOR_KEY_CT, ct);
1794 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1795 FLOW_DISSECTOR_KEY_HASH, hash);
1796
1797 skb_flow_dissector_init(dissector, keys, cnt);
1798 }
1799
fl_create_new_mask(struct cls_fl_head * head,struct fl_flow_mask * mask)1800 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
1801 struct fl_flow_mask *mask)
1802 {
1803 struct fl_flow_mask *newmask;
1804 int err;
1805
1806 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
1807 if (!newmask)
1808 return ERR_PTR(-ENOMEM);
1809
1810 fl_mask_copy(newmask, mask);
1811
1812 if ((newmask->key.tp_range.tp_min.dst &&
1813 newmask->key.tp_range.tp_max.dst) ||
1814 (newmask->key.tp_range.tp_min.src &&
1815 newmask->key.tp_range.tp_max.src))
1816 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE;
1817
1818 err = fl_init_mask_hashtable(newmask);
1819 if (err)
1820 goto errout_free;
1821
1822 fl_init_dissector(&newmask->dissector, &newmask->key);
1823
1824 INIT_LIST_HEAD_RCU(&newmask->filters);
1825
1826 refcount_set(&newmask->refcnt, 1);
1827 err = rhashtable_replace_fast(&head->ht, &mask->ht_node,
1828 &newmask->ht_node, mask_ht_params);
1829 if (err)
1830 goto errout_destroy;
1831
1832 spin_lock(&head->masks_lock);
1833 list_add_tail_rcu(&newmask->list, &head->masks);
1834 spin_unlock(&head->masks_lock);
1835
1836 return newmask;
1837
1838 errout_destroy:
1839 rhashtable_destroy(&newmask->ht);
1840 errout_free:
1841 kfree(newmask);
1842
1843 return ERR_PTR(err);
1844 }
1845
fl_check_assign_mask(struct cls_fl_head * head,struct cls_fl_filter * fnew,struct cls_fl_filter * fold,struct fl_flow_mask * mask)1846 static int fl_check_assign_mask(struct cls_fl_head *head,
1847 struct cls_fl_filter *fnew,
1848 struct cls_fl_filter *fold,
1849 struct fl_flow_mask *mask)
1850 {
1851 struct fl_flow_mask *newmask;
1852 int ret = 0;
1853
1854 rcu_read_lock();
1855
1856 /* Insert mask as temporary node to prevent concurrent creation of mask
1857 * with same key. Any concurrent lookups with same key will return
1858 * -EAGAIN because mask's refcnt is zero.
1859 */
1860 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht,
1861 &mask->ht_node,
1862 mask_ht_params);
1863 if (!fnew->mask) {
1864 rcu_read_unlock();
1865
1866 if (fold) {
1867 ret = -EINVAL;
1868 goto errout_cleanup;
1869 }
1870
1871 newmask = fl_create_new_mask(head, mask);
1872 if (IS_ERR(newmask)) {
1873 ret = PTR_ERR(newmask);
1874 goto errout_cleanup;
1875 }
1876
1877 fnew->mask = newmask;
1878 return 0;
1879 } else if (IS_ERR(fnew->mask)) {
1880 ret = PTR_ERR(fnew->mask);
1881 } else if (fold && fold->mask != fnew->mask) {
1882 ret = -EINVAL;
1883 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) {
1884 /* Mask was deleted concurrently, try again */
1885 ret = -EAGAIN;
1886 }
1887 rcu_read_unlock();
1888 return ret;
1889
1890 errout_cleanup:
1891 rhashtable_remove_fast(&head->ht, &mask->ht_node,
1892 mask_ht_params);
1893 return ret;
1894 }
1895
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)1896 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
1897 struct cls_fl_filter *f, struct fl_flow_mask *mask,
1898 unsigned long base, struct nlattr **tb,
1899 struct nlattr *est, bool ovr,
1900 struct fl_flow_tmplt *tmplt, bool rtnl_held,
1901 struct netlink_ext_ack *extack)
1902 {
1903 int err;
1904
1905 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, rtnl_held,
1906 extack);
1907 if (err < 0)
1908 return err;
1909
1910 if (tb[TCA_FLOWER_CLASSID]) {
1911 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
1912 if (!rtnl_held)
1913 rtnl_lock();
1914 tcf_bind_filter(tp, &f->res, base);
1915 if (!rtnl_held)
1916 rtnl_unlock();
1917 }
1918
1919 err = fl_set_key(net, tb, &f->key, &mask->key, extack);
1920 if (err)
1921 return err;
1922
1923 fl_mask_update_range(mask);
1924 fl_set_masked_key(&f->mkey, &f->key, mask);
1925
1926 if (!fl_mask_fits_tmplt(tmplt, mask)) {
1927 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
1928 return -EINVAL;
1929 }
1930
1931 return 0;
1932 }
1933
fl_ht_insert_unique(struct cls_fl_filter * fnew,struct cls_fl_filter * fold,bool * in_ht)1934 static int fl_ht_insert_unique(struct cls_fl_filter *fnew,
1935 struct cls_fl_filter *fold,
1936 bool *in_ht)
1937 {
1938 struct fl_flow_mask *mask = fnew->mask;
1939 int err;
1940
1941 err = rhashtable_lookup_insert_fast(&mask->ht,
1942 &fnew->ht_node,
1943 mask->filter_ht_params);
1944 if (err) {
1945 *in_ht = false;
1946 /* It is okay if filter with same key exists when
1947 * overwriting.
1948 */
1949 return fold && err == -EEXIST ? 0 : err;
1950 }
1951
1952 *in_ht = true;
1953 return 0;
1954 }
1955
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)1956 static int fl_change(struct net *net, struct sk_buff *in_skb,
1957 struct tcf_proto *tp, unsigned long base,
1958 u32 handle, struct nlattr **tca,
1959 void **arg, bool ovr, bool rtnl_held,
1960 struct netlink_ext_ack *extack)
1961 {
1962 struct cls_fl_head *head = fl_head_dereference(tp);
1963 struct cls_fl_filter *fold = *arg;
1964 struct cls_fl_filter *fnew;
1965 struct fl_flow_mask *mask;
1966 struct nlattr **tb;
1967 bool in_ht;
1968 int err;
1969
1970 if (!tca[TCA_OPTIONS]) {
1971 err = -EINVAL;
1972 goto errout_fold;
1973 }
1974
1975 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL);
1976 if (!mask) {
1977 err = -ENOBUFS;
1978 goto errout_fold;
1979 }
1980
1981 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1982 if (!tb) {
1983 err = -ENOBUFS;
1984 goto errout_mask_alloc;
1985 }
1986
1987 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
1988 tca[TCA_OPTIONS], fl_policy, NULL);
1989 if (err < 0)
1990 goto errout_tb;
1991
1992 if (fold && handle && fold->handle != handle) {
1993 err = -EINVAL;
1994 goto errout_tb;
1995 }
1996
1997 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
1998 if (!fnew) {
1999 err = -ENOBUFS;
2000 goto errout_tb;
2001 }
2002 INIT_LIST_HEAD(&fnew->hw_list);
2003 refcount_set(&fnew->refcnt, 1);
2004
2005 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0);
2006 if (err < 0)
2007 goto errout;
2008
2009 if (tb[TCA_FLOWER_FLAGS]) {
2010 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
2011
2012 if (!tc_flags_valid(fnew->flags)) {
2013 err = -EINVAL;
2014 goto errout;
2015 }
2016 }
2017
2018 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr,
2019 tp->chain->tmplt_priv, rtnl_held, extack);
2020 if (err)
2021 goto errout;
2022
2023 err = fl_check_assign_mask(head, fnew, fold, mask);
2024 if (err)
2025 goto errout;
2026
2027 err = fl_ht_insert_unique(fnew, fold, &in_ht);
2028 if (err)
2029 goto errout_mask;
2030
2031 if (!tc_skip_hw(fnew->flags)) {
2032 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack);
2033 if (err)
2034 goto errout_ht;
2035 }
2036
2037 if (!tc_in_hw(fnew->flags))
2038 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
2039
2040 spin_lock(&tp->lock);
2041
2042 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup
2043 * proto again or create new one, if necessary.
2044 */
2045 if (tp->deleting) {
2046 err = -EAGAIN;
2047 goto errout_hw;
2048 }
2049
2050 if (fold) {
2051 /* Fold filter was deleted concurrently. Retry lookup. */
2052 if (fold->deleted) {
2053 err = -EAGAIN;
2054 goto errout_hw;
2055 }
2056
2057 fnew->handle = handle;
2058
2059 if (!in_ht) {
2060 struct rhashtable_params params =
2061 fnew->mask->filter_ht_params;
2062
2063 err = rhashtable_insert_fast(&fnew->mask->ht,
2064 &fnew->ht_node,
2065 params);
2066 if (err)
2067 goto errout_hw;
2068 in_ht = true;
2069 }
2070
2071 refcount_inc(&fnew->refcnt);
2072 rhashtable_remove_fast(&fold->mask->ht,
2073 &fold->ht_node,
2074 fold->mask->filter_ht_params);
2075 idr_replace(&head->handle_idr, fnew, fnew->handle);
2076 list_replace_rcu(&fold->list, &fnew->list);
2077 fold->deleted = true;
2078
2079 spin_unlock(&tp->lock);
2080
2081 fl_mask_put(head, fold->mask);
2082 if (!tc_skip_hw(fold->flags))
2083 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL);
2084 tcf_unbind_filter(tp, &fold->res);
2085 /* Caller holds reference to fold, so refcnt is always > 0
2086 * after this.
2087 */
2088 refcount_dec(&fold->refcnt);
2089 __fl_put(fold);
2090 } else {
2091 if (handle) {
2092 /* user specifies a handle and it doesn't exist */
2093 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
2094 handle, GFP_ATOMIC);
2095
2096 /* Filter with specified handle was concurrently
2097 * inserted after initial check in cls_api. This is not
2098 * necessarily an error if NLM_F_EXCL is not set in
2099 * message flags. Returning EAGAIN will cause cls_api to
2100 * try to update concurrently inserted rule.
2101 */
2102 if (err == -ENOSPC)
2103 err = -EAGAIN;
2104 } else {
2105 handle = 1;
2106 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
2107 INT_MAX, GFP_ATOMIC);
2108 }
2109 if (err)
2110 goto errout_hw;
2111
2112 refcount_inc(&fnew->refcnt);
2113 fnew->handle = handle;
2114 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
2115 spin_unlock(&tp->lock);
2116 }
2117
2118 *arg = fnew;
2119
2120 kfree(tb);
2121 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2122 return 0;
2123
2124 errout_ht:
2125 spin_lock(&tp->lock);
2126 errout_hw:
2127 fnew->deleted = true;
2128 spin_unlock(&tp->lock);
2129 if (!tc_skip_hw(fnew->flags))
2130 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL);
2131 if (in_ht)
2132 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node,
2133 fnew->mask->filter_ht_params);
2134 errout_mask:
2135 fl_mask_put(head, fnew->mask);
2136 errout:
2137 __fl_put(fnew);
2138 errout_tb:
2139 kfree(tb);
2140 errout_mask_alloc:
2141 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2142 errout_fold:
2143 if (fold)
2144 __fl_put(fold);
2145 return err;
2146 }
2147
fl_delete(struct tcf_proto * tp,void * arg,bool * last,bool rtnl_held,struct netlink_ext_ack * extack)2148 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
2149 bool rtnl_held, struct netlink_ext_ack *extack)
2150 {
2151 struct cls_fl_head *head = fl_head_dereference(tp);
2152 struct cls_fl_filter *f = arg;
2153 bool last_on_mask;
2154 int err = 0;
2155
2156 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack);
2157 *last = list_empty(&head->masks);
2158 __fl_put(f);
2159
2160 return err;
2161 }
2162
fl_walk(struct tcf_proto * tp,struct tcf_walker * arg,bool rtnl_held)2163 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg,
2164 bool rtnl_held)
2165 {
2166 struct cls_fl_head *head = fl_head_dereference(tp);
2167 unsigned long id = arg->cookie, tmp;
2168 struct cls_fl_filter *f;
2169
2170 arg->count = arg->skip;
2171
2172 rcu_read_lock();
2173 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) {
2174 /* don't return filters that are being deleted */
2175 if (!refcount_inc_not_zero(&f->refcnt))
2176 continue;
2177 rcu_read_unlock();
2178
2179 if (arg->fn(tp, f, arg) < 0) {
2180 __fl_put(f);
2181 arg->stop = 1;
2182 rcu_read_lock();
2183 break;
2184 }
2185 __fl_put(f);
2186 arg->count++;
2187 rcu_read_lock();
2188 }
2189 rcu_read_unlock();
2190 arg->cookie = id;
2191 }
2192
2193 static struct cls_fl_filter *
fl_get_next_hw_filter(struct tcf_proto * tp,struct cls_fl_filter * f,bool add)2194 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add)
2195 {
2196 struct cls_fl_head *head = fl_head_dereference(tp);
2197
2198 spin_lock(&tp->lock);
2199 if (list_empty(&head->hw_filters)) {
2200 spin_unlock(&tp->lock);
2201 return NULL;
2202 }
2203
2204 if (!f)
2205 f = list_entry(&head->hw_filters, struct cls_fl_filter,
2206 hw_list);
2207 list_for_each_entry_continue(f, &head->hw_filters, hw_list) {
2208 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) {
2209 spin_unlock(&tp->lock);
2210 return f;
2211 }
2212 }
2213
2214 spin_unlock(&tp->lock);
2215 return NULL;
2216 }
2217
fl_reoffload(struct tcf_proto * tp,bool add,flow_setup_cb_t * cb,void * cb_priv,struct netlink_ext_ack * extack)2218 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb,
2219 void *cb_priv, struct netlink_ext_ack *extack)
2220 {
2221 struct tcf_block *block = tp->chain->block;
2222 struct flow_cls_offload cls_flower = {};
2223 struct cls_fl_filter *f = NULL;
2224 int err;
2225
2226 /* hw_filters list can only be changed by hw offload functions after
2227 * obtaining rtnl lock. Make sure it is not changed while reoffload is
2228 * iterating it.
2229 */
2230 ASSERT_RTNL();
2231
2232 while ((f = fl_get_next_hw_filter(tp, f, add))) {
2233 cls_flower.rule =
2234 flow_rule_alloc(tcf_exts_num_actions(&f->exts));
2235 if (!cls_flower.rule) {
2236 __fl_put(f);
2237 return -ENOMEM;
2238 }
2239
2240 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags,
2241 extack);
2242 cls_flower.command = add ?
2243 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY;
2244 cls_flower.cookie = (unsigned long)f;
2245 cls_flower.rule->match.dissector = &f->mask->dissector;
2246 cls_flower.rule->match.mask = &f->mask->key;
2247 cls_flower.rule->match.key = &f->mkey;
2248
2249 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts);
2250 if (err) {
2251 kfree(cls_flower.rule);
2252 if (tc_skip_sw(f->flags)) {
2253 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
2254 __fl_put(f);
2255 return err;
2256 }
2257 goto next_flow;
2258 }
2259
2260 cls_flower.classid = f->res.classid;
2261
2262 err = tc_setup_cb_reoffload(block, tp, add, cb,
2263 TC_SETUP_CLSFLOWER, &cls_flower,
2264 cb_priv, &f->flags,
2265 &f->in_hw_count);
2266 tc_cleanup_flow_action(&cls_flower.rule->action);
2267 kfree(cls_flower.rule);
2268
2269 if (err) {
2270 __fl_put(f);
2271 return err;
2272 }
2273 next_flow:
2274 __fl_put(f);
2275 }
2276
2277 return 0;
2278 }
2279
fl_hw_add(struct tcf_proto * tp,void * type_data)2280 static void fl_hw_add(struct tcf_proto *tp, void *type_data)
2281 {
2282 struct flow_cls_offload *cls_flower = type_data;
2283 struct cls_fl_filter *f =
2284 (struct cls_fl_filter *) cls_flower->cookie;
2285 struct cls_fl_head *head = fl_head_dereference(tp);
2286
2287 spin_lock(&tp->lock);
2288 list_add(&f->hw_list, &head->hw_filters);
2289 spin_unlock(&tp->lock);
2290 }
2291
fl_hw_del(struct tcf_proto * tp,void * type_data)2292 static void fl_hw_del(struct tcf_proto *tp, void *type_data)
2293 {
2294 struct flow_cls_offload *cls_flower = type_data;
2295 struct cls_fl_filter *f =
2296 (struct cls_fl_filter *) cls_flower->cookie;
2297
2298 spin_lock(&tp->lock);
2299 if (!list_empty(&f->hw_list))
2300 list_del_init(&f->hw_list);
2301 spin_unlock(&tp->lock);
2302 }
2303
fl_hw_create_tmplt(struct tcf_chain * chain,struct fl_flow_tmplt * tmplt)2304 static int fl_hw_create_tmplt(struct tcf_chain *chain,
2305 struct fl_flow_tmplt *tmplt)
2306 {
2307 struct flow_cls_offload cls_flower = {};
2308 struct tcf_block *block = chain->block;
2309
2310 cls_flower.rule = flow_rule_alloc(0);
2311 if (!cls_flower.rule)
2312 return -ENOMEM;
2313
2314 cls_flower.common.chain_index = chain->index;
2315 cls_flower.command = FLOW_CLS_TMPLT_CREATE;
2316 cls_flower.cookie = (unsigned long) tmplt;
2317 cls_flower.rule->match.dissector = &tmplt->dissector;
2318 cls_flower.rule->match.mask = &tmplt->mask;
2319 cls_flower.rule->match.key = &tmplt->dummy_key;
2320
2321 /* We don't care if driver (any of them) fails to handle this
2322 * call. It serves just as a hint for it.
2323 */
2324 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2325 kfree(cls_flower.rule);
2326
2327 return 0;
2328 }
2329
fl_hw_destroy_tmplt(struct tcf_chain * chain,struct fl_flow_tmplt * tmplt)2330 static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
2331 struct fl_flow_tmplt *tmplt)
2332 {
2333 struct flow_cls_offload cls_flower = {};
2334 struct tcf_block *block = chain->block;
2335
2336 cls_flower.common.chain_index = chain->index;
2337 cls_flower.command = FLOW_CLS_TMPLT_DESTROY;
2338 cls_flower.cookie = (unsigned long) tmplt;
2339
2340 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2341 }
2342
fl_tmplt_create(struct net * net,struct tcf_chain * chain,struct nlattr ** tca,struct netlink_ext_ack * extack)2343 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
2344 struct nlattr **tca,
2345 struct netlink_ext_ack *extack)
2346 {
2347 struct fl_flow_tmplt *tmplt;
2348 struct nlattr **tb;
2349 int err;
2350
2351 if (!tca[TCA_OPTIONS])
2352 return ERR_PTR(-EINVAL);
2353
2354 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
2355 if (!tb)
2356 return ERR_PTR(-ENOBUFS);
2357 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
2358 tca[TCA_OPTIONS], fl_policy, NULL);
2359 if (err)
2360 goto errout_tb;
2361
2362 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
2363 if (!tmplt) {
2364 err = -ENOMEM;
2365 goto errout_tb;
2366 }
2367 tmplt->chain = chain;
2368 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
2369 if (err)
2370 goto errout_tmplt;
2371
2372 fl_init_dissector(&tmplt->dissector, &tmplt->mask);
2373
2374 err = fl_hw_create_tmplt(chain, tmplt);
2375 if (err)
2376 goto errout_tmplt;
2377
2378 kfree(tb);
2379 return tmplt;
2380
2381 errout_tmplt:
2382 kfree(tmplt);
2383 errout_tb:
2384 kfree(tb);
2385 return ERR_PTR(err);
2386 }
2387
fl_tmplt_destroy(void * tmplt_priv)2388 static void fl_tmplt_destroy(void *tmplt_priv)
2389 {
2390 struct fl_flow_tmplt *tmplt = tmplt_priv;
2391
2392 fl_hw_destroy_tmplt(tmplt->chain, tmplt);
2393 kfree(tmplt);
2394 }
2395
fl_dump_key_val(struct sk_buff * skb,void * val,int val_type,void * mask,int mask_type,int len)2396 static int fl_dump_key_val(struct sk_buff *skb,
2397 void *val, int val_type,
2398 void *mask, int mask_type, int len)
2399 {
2400 int err;
2401
2402 if (!memchr_inv(mask, 0, len))
2403 return 0;
2404 err = nla_put(skb, val_type, len, val);
2405 if (err)
2406 return err;
2407 if (mask_type != TCA_FLOWER_UNSPEC) {
2408 err = nla_put(skb, mask_type, len, mask);
2409 if (err)
2410 return err;
2411 }
2412 return 0;
2413 }
2414
fl_dump_key_port_range(struct sk_buff * skb,struct fl_flow_key * key,struct fl_flow_key * mask)2415 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key,
2416 struct fl_flow_key *mask)
2417 {
2418 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst,
2419 TCA_FLOWER_KEY_PORT_DST_MIN,
2420 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC,
2421 sizeof(key->tp_range.tp_min.dst)) ||
2422 fl_dump_key_val(skb, &key->tp_range.tp_max.dst,
2423 TCA_FLOWER_KEY_PORT_DST_MAX,
2424 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC,
2425 sizeof(key->tp_range.tp_max.dst)) ||
2426 fl_dump_key_val(skb, &key->tp_range.tp_min.src,
2427 TCA_FLOWER_KEY_PORT_SRC_MIN,
2428 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC,
2429 sizeof(key->tp_range.tp_min.src)) ||
2430 fl_dump_key_val(skb, &key->tp_range.tp_max.src,
2431 TCA_FLOWER_KEY_PORT_SRC_MAX,
2432 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC,
2433 sizeof(key->tp_range.tp_max.src)))
2434 return -1;
2435
2436 return 0;
2437 }
2438
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)2439 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb,
2440 struct flow_dissector_key_mpls *mpls_key,
2441 struct flow_dissector_key_mpls *mpls_mask,
2442 u8 lse_index)
2443 {
2444 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index];
2445 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index];
2446 int err;
2447
2448 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH,
2449 lse_index + 1);
2450 if (err)
2451 return err;
2452
2453 if (lse_mask->mpls_ttl) {
2454 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL,
2455 lse_key->mpls_ttl);
2456 if (err)
2457 return err;
2458 }
2459 if (lse_mask->mpls_bos) {
2460 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS,
2461 lse_key->mpls_bos);
2462 if (err)
2463 return err;
2464 }
2465 if (lse_mask->mpls_tc) {
2466 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC,
2467 lse_key->mpls_tc);
2468 if (err)
2469 return err;
2470 }
2471 if (lse_mask->mpls_label) {
2472 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL,
2473 lse_key->mpls_label);
2474 if (err)
2475 return err;
2476 }
2477
2478 return 0;
2479 }
2480
fl_dump_key_mpls_opts(struct sk_buff * skb,struct flow_dissector_key_mpls * mpls_key,struct flow_dissector_key_mpls * mpls_mask)2481 static int fl_dump_key_mpls_opts(struct sk_buff *skb,
2482 struct flow_dissector_key_mpls *mpls_key,
2483 struct flow_dissector_key_mpls *mpls_mask)
2484 {
2485 struct nlattr *opts;
2486 struct nlattr *lse;
2487 u8 lse_index;
2488 int err;
2489
2490 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS);
2491 if (!opts)
2492 return -EMSGSIZE;
2493
2494 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) {
2495 if (!(mpls_mask->used_lses & 1 << lse_index))
2496 continue;
2497
2498 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE);
2499 if (!lse) {
2500 err = -EMSGSIZE;
2501 goto err_opts;
2502 }
2503
2504 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask,
2505 lse_index);
2506 if (err)
2507 goto err_opts_lse;
2508 nla_nest_end(skb, lse);
2509 }
2510 nla_nest_end(skb, opts);
2511
2512 return 0;
2513
2514 err_opts_lse:
2515 nla_nest_cancel(skb, lse);
2516 err_opts:
2517 nla_nest_cancel(skb, opts);
2518
2519 return err;
2520 }
2521
fl_dump_key_mpls(struct sk_buff * skb,struct flow_dissector_key_mpls * mpls_key,struct flow_dissector_key_mpls * mpls_mask)2522 static int fl_dump_key_mpls(struct sk_buff *skb,
2523 struct flow_dissector_key_mpls *mpls_key,
2524 struct flow_dissector_key_mpls *mpls_mask)
2525 {
2526 struct flow_dissector_mpls_lse *lse_mask;
2527 struct flow_dissector_mpls_lse *lse_key;
2528 int err;
2529
2530 if (!mpls_mask->used_lses)
2531 return 0;
2532
2533 lse_mask = &mpls_mask->ls[0];
2534 lse_key = &mpls_key->ls[0];
2535
2536 /* For backward compatibility, don't use the MPLS nested attributes if
2537 * the rule can be expressed using the old attributes.
2538 */
2539 if (mpls_mask->used_lses & ~1 ||
2540 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos &&
2541 !lse_mask->mpls_tc && !lse_mask->mpls_label))
2542 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask);
2543
2544 if (lse_mask->mpls_ttl) {
2545 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
2546 lse_key->mpls_ttl);
2547 if (err)
2548 return err;
2549 }
2550 if (lse_mask->mpls_tc) {
2551 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
2552 lse_key->mpls_tc);
2553 if (err)
2554 return err;
2555 }
2556 if (lse_mask->mpls_label) {
2557 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
2558 lse_key->mpls_label);
2559 if (err)
2560 return err;
2561 }
2562 if (lse_mask->mpls_bos) {
2563 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
2564 lse_key->mpls_bos);
2565 if (err)
2566 return err;
2567 }
2568 return 0;
2569 }
2570
fl_dump_key_ip(struct sk_buff * skb,bool encap,struct flow_dissector_key_ip * key,struct flow_dissector_key_ip * mask)2571 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
2572 struct flow_dissector_key_ip *key,
2573 struct flow_dissector_key_ip *mask)
2574 {
2575 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
2576 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
2577 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
2578 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
2579
2580 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
2581 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
2582 return -1;
2583
2584 return 0;
2585 }
2586
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)2587 static int fl_dump_key_vlan(struct sk_buff *skb,
2588 int vlan_id_key, int vlan_prio_key,
2589 struct flow_dissector_key_vlan *vlan_key,
2590 struct flow_dissector_key_vlan *vlan_mask)
2591 {
2592 int err;
2593
2594 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
2595 return 0;
2596 if (vlan_mask->vlan_id) {
2597 err = nla_put_u16(skb, vlan_id_key,
2598 vlan_key->vlan_id);
2599 if (err)
2600 return err;
2601 }
2602 if (vlan_mask->vlan_priority) {
2603 err = nla_put_u8(skb, vlan_prio_key,
2604 vlan_key->vlan_priority);
2605 if (err)
2606 return err;
2607 }
2608 return 0;
2609 }
2610
fl_get_key_flag(u32 dissector_key,u32 dissector_mask,u32 * flower_key,u32 * flower_mask,u32 flower_flag_bit,u32 dissector_flag_bit)2611 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
2612 u32 *flower_key, u32 *flower_mask,
2613 u32 flower_flag_bit, u32 dissector_flag_bit)
2614 {
2615 if (dissector_mask & dissector_flag_bit) {
2616 *flower_mask |= flower_flag_bit;
2617 if (dissector_key & dissector_flag_bit)
2618 *flower_key |= flower_flag_bit;
2619 }
2620 }
2621
fl_dump_key_flags(struct sk_buff * skb,u32 flags_key,u32 flags_mask)2622 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
2623 {
2624 u32 key, mask;
2625 __be32 _key, _mask;
2626 int err;
2627
2628 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
2629 return 0;
2630
2631 key = 0;
2632 mask = 0;
2633
2634 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2635 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
2636 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2637 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
2638 FLOW_DIS_FIRST_FRAG);
2639
2640 _key = cpu_to_be32(key);
2641 _mask = cpu_to_be32(mask);
2642
2643 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
2644 if (err)
2645 return err;
2646
2647 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
2648 }
2649
fl_dump_key_geneve_opt(struct sk_buff * skb,struct flow_dissector_key_enc_opts * enc_opts)2650 static int fl_dump_key_geneve_opt(struct sk_buff *skb,
2651 struct flow_dissector_key_enc_opts *enc_opts)
2652 {
2653 struct geneve_opt *opt;
2654 struct nlattr *nest;
2655 int opt_off = 0;
2656
2657 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
2658 if (!nest)
2659 goto nla_put_failure;
2660
2661 while (enc_opts->len > opt_off) {
2662 opt = (struct geneve_opt *)&enc_opts->data[opt_off];
2663
2664 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
2665 opt->opt_class))
2666 goto nla_put_failure;
2667 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
2668 opt->type))
2669 goto nla_put_failure;
2670 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
2671 opt->length * 4, opt->opt_data))
2672 goto nla_put_failure;
2673
2674 opt_off += sizeof(struct geneve_opt) + opt->length * 4;
2675 }
2676 nla_nest_end(skb, nest);
2677 return 0;
2678
2679 nla_put_failure:
2680 nla_nest_cancel(skb, nest);
2681 return -EMSGSIZE;
2682 }
2683
fl_dump_key_vxlan_opt(struct sk_buff * skb,struct flow_dissector_key_enc_opts * enc_opts)2684 static int fl_dump_key_vxlan_opt(struct sk_buff *skb,
2685 struct flow_dissector_key_enc_opts *enc_opts)
2686 {
2687 struct vxlan_metadata *md;
2688 struct nlattr *nest;
2689
2690 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN);
2691 if (!nest)
2692 goto nla_put_failure;
2693
2694 md = (struct vxlan_metadata *)&enc_opts->data[0];
2695 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp))
2696 goto nla_put_failure;
2697
2698 nla_nest_end(skb, nest);
2699 return 0;
2700
2701 nla_put_failure:
2702 nla_nest_cancel(skb, nest);
2703 return -EMSGSIZE;
2704 }
2705
fl_dump_key_erspan_opt(struct sk_buff * skb,struct flow_dissector_key_enc_opts * enc_opts)2706 static int fl_dump_key_erspan_opt(struct sk_buff *skb,
2707 struct flow_dissector_key_enc_opts *enc_opts)
2708 {
2709 struct erspan_metadata *md;
2710 struct nlattr *nest;
2711
2712 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN);
2713 if (!nest)
2714 goto nla_put_failure;
2715
2716 md = (struct erspan_metadata *)&enc_opts->data[0];
2717 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version))
2718 goto nla_put_failure;
2719
2720 if (md->version == 1 &&
2721 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index))
2722 goto nla_put_failure;
2723
2724 if (md->version == 2 &&
2725 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR,
2726 md->u.md2.dir) ||
2727 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID,
2728 get_hwid(&md->u.md2))))
2729 goto nla_put_failure;
2730
2731 nla_nest_end(skb, nest);
2732 return 0;
2733
2734 nla_put_failure:
2735 nla_nest_cancel(skb, nest);
2736 return -EMSGSIZE;
2737 }
2738
fl_dump_key_ct(struct sk_buff * skb,struct flow_dissector_key_ct * key,struct flow_dissector_key_ct * mask)2739 static int fl_dump_key_ct(struct sk_buff *skb,
2740 struct flow_dissector_key_ct *key,
2741 struct flow_dissector_key_ct *mask)
2742 {
2743 if (IS_ENABLED(CONFIG_NF_CONNTRACK) &&
2744 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
2745 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
2746 sizeof(key->ct_state)))
2747 goto nla_put_failure;
2748
2749 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
2750 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
2751 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
2752 sizeof(key->ct_zone)))
2753 goto nla_put_failure;
2754
2755 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
2756 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
2757 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
2758 sizeof(key->ct_mark)))
2759 goto nla_put_failure;
2760
2761 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
2762 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
2763 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
2764 sizeof(key->ct_labels)))
2765 goto nla_put_failure;
2766
2767 return 0;
2768
2769 nla_put_failure:
2770 return -EMSGSIZE;
2771 }
2772
fl_dump_key_options(struct sk_buff * skb,int enc_opt_type,struct flow_dissector_key_enc_opts * enc_opts)2773 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
2774 struct flow_dissector_key_enc_opts *enc_opts)
2775 {
2776 struct nlattr *nest;
2777 int err;
2778
2779 if (!enc_opts->len)
2780 return 0;
2781
2782 nest = nla_nest_start_noflag(skb, enc_opt_type);
2783 if (!nest)
2784 goto nla_put_failure;
2785
2786 switch (enc_opts->dst_opt_type) {
2787 case TUNNEL_GENEVE_OPT:
2788 err = fl_dump_key_geneve_opt(skb, enc_opts);
2789 if (err)
2790 goto nla_put_failure;
2791 break;
2792 case TUNNEL_VXLAN_OPT:
2793 err = fl_dump_key_vxlan_opt(skb, enc_opts);
2794 if (err)
2795 goto nla_put_failure;
2796 break;
2797 case TUNNEL_ERSPAN_OPT:
2798 err = fl_dump_key_erspan_opt(skb, enc_opts);
2799 if (err)
2800 goto nla_put_failure;
2801 break;
2802 default:
2803 goto nla_put_failure;
2804 }
2805 nla_nest_end(skb, nest);
2806 return 0;
2807
2808 nla_put_failure:
2809 nla_nest_cancel(skb, nest);
2810 return -EMSGSIZE;
2811 }
2812
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)2813 static int fl_dump_key_enc_opt(struct sk_buff *skb,
2814 struct flow_dissector_key_enc_opts *key_opts,
2815 struct flow_dissector_key_enc_opts *msk_opts)
2816 {
2817 int err;
2818
2819 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
2820 if (err)
2821 return err;
2822
2823 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
2824 }
2825
fl_dump_key(struct sk_buff * skb,struct net * net,struct fl_flow_key * key,struct fl_flow_key * mask)2826 static int fl_dump_key(struct sk_buff *skb, struct net *net,
2827 struct fl_flow_key *key, struct fl_flow_key *mask)
2828 {
2829 if (mask->meta.ingress_ifindex) {
2830 struct net_device *dev;
2831
2832 dev = __dev_get_by_index(net, key->meta.ingress_ifindex);
2833 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
2834 goto nla_put_failure;
2835 }
2836
2837 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
2838 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
2839 sizeof(key->eth.dst)) ||
2840 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
2841 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
2842 sizeof(key->eth.src)) ||
2843 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
2844 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
2845 sizeof(key->basic.n_proto)))
2846 goto nla_put_failure;
2847
2848 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
2849 goto nla_put_failure;
2850
2851 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
2852 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
2853 goto nla_put_failure;
2854
2855 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
2856 TCA_FLOWER_KEY_CVLAN_PRIO,
2857 &key->cvlan, &mask->cvlan) ||
2858 (mask->cvlan.vlan_tpid &&
2859 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
2860 key->cvlan.vlan_tpid)))
2861 goto nla_put_failure;
2862
2863 if (mask->basic.n_proto) {
2864 if (mask->cvlan.vlan_tpid) {
2865 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
2866 key->basic.n_proto))
2867 goto nla_put_failure;
2868 } else if (mask->vlan.vlan_tpid) {
2869 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
2870 key->basic.n_proto))
2871 goto nla_put_failure;
2872 }
2873 }
2874
2875 if ((key->basic.n_proto == htons(ETH_P_IP) ||
2876 key->basic.n_proto == htons(ETH_P_IPV6)) &&
2877 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
2878 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
2879 sizeof(key->basic.ip_proto)) ||
2880 fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
2881 goto nla_put_failure;
2882
2883 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
2884 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
2885 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
2886 sizeof(key->ipv4.src)) ||
2887 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
2888 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
2889 sizeof(key->ipv4.dst))))
2890 goto nla_put_failure;
2891 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
2892 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
2893 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
2894 sizeof(key->ipv6.src)) ||
2895 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
2896 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
2897 sizeof(key->ipv6.dst))))
2898 goto nla_put_failure;
2899
2900 if (key->basic.ip_proto == IPPROTO_TCP &&
2901 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
2902 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
2903 sizeof(key->tp.src)) ||
2904 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
2905 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
2906 sizeof(key->tp.dst)) ||
2907 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
2908 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
2909 sizeof(key->tcp.flags))))
2910 goto nla_put_failure;
2911 else if (key->basic.ip_proto == IPPROTO_UDP &&
2912 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
2913 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
2914 sizeof(key->tp.src)) ||
2915 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
2916 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
2917 sizeof(key->tp.dst))))
2918 goto nla_put_failure;
2919 else if (key->basic.ip_proto == IPPROTO_SCTP &&
2920 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
2921 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
2922 sizeof(key->tp.src)) ||
2923 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
2924 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
2925 sizeof(key->tp.dst))))
2926 goto nla_put_failure;
2927 else if (key->basic.n_proto == htons(ETH_P_IP) &&
2928 key->basic.ip_proto == IPPROTO_ICMP &&
2929 (fl_dump_key_val(skb, &key->icmp.type,
2930 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
2931 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
2932 sizeof(key->icmp.type)) ||
2933 fl_dump_key_val(skb, &key->icmp.code,
2934 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
2935 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
2936 sizeof(key->icmp.code))))
2937 goto nla_put_failure;
2938 else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
2939 key->basic.ip_proto == IPPROTO_ICMPV6 &&
2940 (fl_dump_key_val(skb, &key->icmp.type,
2941 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
2942 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
2943 sizeof(key->icmp.type)) ||
2944 fl_dump_key_val(skb, &key->icmp.code,
2945 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
2946 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
2947 sizeof(key->icmp.code))))
2948 goto nla_put_failure;
2949 else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
2950 key->basic.n_proto == htons(ETH_P_RARP)) &&
2951 (fl_dump_key_val(skb, &key->arp.sip,
2952 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
2953 TCA_FLOWER_KEY_ARP_SIP_MASK,
2954 sizeof(key->arp.sip)) ||
2955 fl_dump_key_val(skb, &key->arp.tip,
2956 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
2957 TCA_FLOWER_KEY_ARP_TIP_MASK,
2958 sizeof(key->arp.tip)) ||
2959 fl_dump_key_val(skb, &key->arp.op,
2960 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
2961 TCA_FLOWER_KEY_ARP_OP_MASK,
2962 sizeof(key->arp.op)) ||
2963 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
2964 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
2965 sizeof(key->arp.sha)) ||
2966 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
2967 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
2968 sizeof(key->arp.tha))))
2969 goto nla_put_failure;
2970
2971 if ((key->basic.ip_proto == IPPROTO_TCP ||
2972 key->basic.ip_proto == IPPROTO_UDP ||
2973 key->basic.ip_proto == IPPROTO_SCTP) &&
2974 fl_dump_key_port_range(skb, key, mask))
2975 goto nla_put_failure;
2976
2977 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
2978 (fl_dump_key_val(skb, &key->enc_ipv4.src,
2979 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
2980 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
2981 sizeof(key->enc_ipv4.src)) ||
2982 fl_dump_key_val(skb, &key->enc_ipv4.dst,
2983 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
2984 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
2985 sizeof(key->enc_ipv4.dst))))
2986 goto nla_put_failure;
2987 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
2988 (fl_dump_key_val(skb, &key->enc_ipv6.src,
2989 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
2990 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
2991 sizeof(key->enc_ipv6.src)) ||
2992 fl_dump_key_val(skb, &key->enc_ipv6.dst,
2993 TCA_FLOWER_KEY_ENC_IPV6_DST,
2994 &mask->enc_ipv6.dst,
2995 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
2996 sizeof(key->enc_ipv6.dst))))
2997 goto nla_put_failure;
2998
2999 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
3000 &mask->enc_key_id, TCA_FLOWER_UNSPEC,
3001 sizeof(key->enc_key_id)) ||
3002 fl_dump_key_val(skb, &key->enc_tp.src,
3003 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
3004 &mask->enc_tp.src,
3005 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
3006 sizeof(key->enc_tp.src)) ||
3007 fl_dump_key_val(skb, &key->enc_tp.dst,
3008 TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
3009 &mask->enc_tp.dst,
3010 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
3011 sizeof(key->enc_tp.dst)) ||
3012 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
3013 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
3014 goto nla_put_failure;
3015
3016 if (fl_dump_key_ct(skb, &key->ct, &mask->ct))
3017 goto nla_put_failure;
3018
3019 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
3020 goto nla_put_failure;
3021
3022 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
3023 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
3024 sizeof(key->hash.hash)))
3025 goto nla_put_failure;
3026
3027 return 0;
3028
3029 nla_put_failure:
3030 return -EMSGSIZE;
3031 }
3032
fl_dump(struct net * net,struct tcf_proto * tp,void * fh,struct sk_buff * skb,struct tcmsg * t,bool rtnl_held)3033 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
3034 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3035 {
3036 struct cls_fl_filter *f = fh;
3037 struct nlattr *nest;
3038 struct fl_flow_key *key, *mask;
3039 bool skip_hw;
3040
3041 if (!f)
3042 return skb->len;
3043
3044 t->tcm_handle = f->handle;
3045
3046 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3047 if (!nest)
3048 goto nla_put_failure;
3049
3050 spin_lock(&tp->lock);
3051
3052 if (f->res.classid &&
3053 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
3054 goto nla_put_failure_locked;
3055
3056 key = &f->key;
3057 mask = &f->mask->key;
3058 skip_hw = tc_skip_hw(f->flags);
3059
3060 if (fl_dump_key(skb, net, key, mask))
3061 goto nla_put_failure_locked;
3062
3063 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3064 goto nla_put_failure_locked;
3065
3066 spin_unlock(&tp->lock);
3067
3068 if (!skip_hw)
3069 fl_hw_update_stats(tp, f, rtnl_held);
3070
3071 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count))
3072 goto nla_put_failure;
3073
3074 if (tcf_exts_dump(skb, &f->exts))
3075 goto nla_put_failure;
3076
3077 nla_nest_end(skb, nest);
3078
3079 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
3080 goto nla_put_failure;
3081
3082 return skb->len;
3083
3084 nla_put_failure_locked:
3085 spin_unlock(&tp->lock);
3086 nla_put_failure:
3087 nla_nest_cancel(skb, nest);
3088 return -1;
3089 }
3090
fl_terse_dump(struct net * net,struct tcf_proto * tp,void * fh,struct sk_buff * skb,struct tcmsg * t,bool rtnl_held)3091 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh,
3092 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3093 {
3094 struct cls_fl_filter *f = fh;
3095 struct nlattr *nest;
3096 bool skip_hw;
3097
3098 if (!f)
3099 return skb->len;
3100
3101 t->tcm_handle = f->handle;
3102
3103 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3104 if (!nest)
3105 goto nla_put_failure;
3106
3107 spin_lock(&tp->lock);
3108
3109 skip_hw = tc_skip_hw(f->flags);
3110
3111 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3112 goto nla_put_failure_locked;
3113
3114 spin_unlock(&tp->lock);
3115
3116 if (!skip_hw)
3117 fl_hw_update_stats(tp, f, rtnl_held);
3118
3119 if (tcf_exts_terse_dump(skb, &f->exts))
3120 goto nla_put_failure;
3121
3122 nla_nest_end(skb, nest);
3123
3124 return skb->len;
3125
3126 nla_put_failure_locked:
3127 spin_unlock(&tp->lock);
3128 nla_put_failure:
3129 nla_nest_cancel(skb, nest);
3130 return -1;
3131 }
3132
fl_tmplt_dump(struct sk_buff * skb,struct net * net,void * tmplt_priv)3133 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
3134 {
3135 struct fl_flow_tmplt *tmplt = tmplt_priv;
3136 struct fl_flow_key *key, *mask;
3137 struct nlattr *nest;
3138
3139 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3140 if (!nest)
3141 goto nla_put_failure;
3142
3143 key = &tmplt->dummy_key;
3144 mask = &tmplt->mask;
3145
3146 if (fl_dump_key(skb, net, key, mask))
3147 goto nla_put_failure;
3148
3149 nla_nest_end(skb, nest);
3150
3151 return skb->len;
3152
3153 nla_put_failure:
3154 nla_nest_cancel(skb, nest);
3155 return -EMSGSIZE;
3156 }
3157
fl_bind_class(void * fh,u32 classid,unsigned long cl,void * q,unsigned long base)3158 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q,
3159 unsigned long base)
3160 {
3161 struct cls_fl_filter *f = fh;
3162
3163 if (f && f->res.classid == classid) {
3164 if (cl)
3165 __tcf_bind_filter(q, &f->res, base);
3166 else
3167 __tcf_unbind_filter(q, &f->res);
3168 }
3169 }
3170
fl_delete_empty(struct tcf_proto * tp)3171 static bool fl_delete_empty(struct tcf_proto *tp)
3172 {
3173 struct cls_fl_head *head = fl_head_dereference(tp);
3174
3175 spin_lock(&tp->lock);
3176 tp->deleting = idr_is_empty(&head->handle_idr);
3177 spin_unlock(&tp->lock);
3178
3179 return tp->deleting;
3180 }
3181
3182 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
3183 .kind = "flower",
3184 .classify = fl_classify,
3185 .init = fl_init,
3186 .destroy = fl_destroy,
3187 .get = fl_get,
3188 .put = fl_put,
3189 .change = fl_change,
3190 .delete = fl_delete,
3191 .delete_empty = fl_delete_empty,
3192 .walk = fl_walk,
3193 .reoffload = fl_reoffload,
3194 .hw_add = fl_hw_add,
3195 .hw_del = fl_hw_del,
3196 .dump = fl_dump,
3197 .terse_dump = fl_terse_dump,
3198 .bind_class = fl_bind_class,
3199 .tmplt_create = fl_tmplt_create,
3200 .tmplt_destroy = fl_tmplt_destroy,
3201 .tmplt_dump = fl_tmplt_dump,
3202 .owner = THIS_MODULE,
3203 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED,
3204 };
3205
cls_fl_init(void)3206 static int __init cls_fl_init(void)
3207 {
3208 return register_tcf_proto_ops(&cls_fl_ops);
3209 }
3210
cls_fl_exit(void)3211 static void __exit cls_fl_exit(void)
3212 {
3213 unregister_tcf_proto_ops(&cls_fl_ops);
3214 }
3215
3216 module_init(cls_fl_init);
3217 module_exit(cls_fl_exit);
3218
3219 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3220 MODULE_DESCRIPTION("Flower classifier");
3221 MODULE_LICENSE("GPL v2");
3222