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net/sched: cls_flower: Support matching on ip tos and ttl for tunnels
[thirdparty/linux.git] / net / sched / cls_flower.c
1 /*
2 * net/sched/cls_flower.c Flower classifier
3 *
4 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/rhashtable.h>
16 #include <linux/workqueue.h>
17
18 #include <linux/if_ether.h>
19 #include <linux/in6.h>
20 #include <linux/ip.h>
21 #include <linux/mpls.h>
22
23 #include <net/sch_generic.h>
24 #include <net/pkt_cls.h>
25 #include <net/ip.h>
26 #include <net/flow_dissector.h>
27
28 #include <net/dst.h>
29 #include <net/dst_metadata.h>
30
31 struct fl_flow_key {
32 int indev_ifindex;
33 struct flow_dissector_key_control control;
34 struct flow_dissector_key_control enc_control;
35 struct flow_dissector_key_basic basic;
36 struct flow_dissector_key_eth_addrs eth;
37 struct flow_dissector_key_vlan vlan;
38 struct flow_dissector_key_vlan cvlan;
39 union {
40 struct flow_dissector_key_ipv4_addrs ipv4;
41 struct flow_dissector_key_ipv6_addrs ipv6;
42 };
43 struct flow_dissector_key_ports tp;
44 struct flow_dissector_key_icmp icmp;
45 struct flow_dissector_key_arp arp;
46 struct flow_dissector_key_keyid enc_key_id;
47 union {
48 struct flow_dissector_key_ipv4_addrs enc_ipv4;
49 struct flow_dissector_key_ipv6_addrs enc_ipv6;
50 };
51 struct flow_dissector_key_ports enc_tp;
52 struct flow_dissector_key_mpls mpls;
53 struct flow_dissector_key_tcp tcp;
54 struct flow_dissector_key_ip ip;
55 struct flow_dissector_key_ip enc_ip;
56 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
57
58 struct fl_flow_mask_range {
59 unsigned short int start;
60 unsigned short int end;
61 };
62
63 struct fl_flow_mask {
64 struct fl_flow_key key;
65 struct fl_flow_mask_range range;
66 struct rhash_head ht_node;
67 struct rhashtable ht;
68 struct rhashtable_params filter_ht_params;
69 struct flow_dissector dissector;
70 struct list_head filters;
71 struct rcu_work rwork;
72 struct list_head list;
73 };
74
75 struct cls_fl_head {
76 struct rhashtable ht;
77 struct list_head masks;
78 struct rcu_work rwork;
79 struct idr handle_idr;
80 };
81
82 struct cls_fl_filter {
83 struct fl_flow_mask *mask;
84 struct rhash_head ht_node;
85 struct fl_flow_key mkey;
86 struct tcf_exts exts;
87 struct tcf_result res;
88 struct fl_flow_key key;
89 struct list_head list;
90 u32 handle;
91 u32 flags;
92 unsigned int in_hw_count;
93 struct rcu_work rwork;
94 struct net_device *hw_dev;
95 };
96
97 static const struct rhashtable_params mask_ht_params = {
98 .key_offset = offsetof(struct fl_flow_mask, key),
99 .key_len = sizeof(struct fl_flow_key),
100 .head_offset = offsetof(struct fl_flow_mask, ht_node),
101 .automatic_shrinking = true,
102 };
103
104 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
105 {
106 return mask->range.end - mask->range.start;
107 }
108
109 static void fl_mask_update_range(struct fl_flow_mask *mask)
110 {
111 const u8 *bytes = (const u8 *) &mask->key;
112 size_t size = sizeof(mask->key);
113 size_t i, first = 0, last;
114
115 for (i = 0; i < size; i++) {
116 if (bytes[i]) {
117 first = i;
118 break;
119 }
120 }
121 last = first;
122 for (i = size - 1; i != first; i--) {
123 if (bytes[i]) {
124 last = i;
125 break;
126 }
127 }
128 mask->range.start = rounddown(first, sizeof(long));
129 mask->range.end = roundup(last + 1, sizeof(long));
130 }
131
132 static void *fl_key_get_start(struct fl_flow_key *key,
133 const struct fl_flow_mask *mask)
134 {
135 return (u8 *) key + mask->range.start;
136 }
137
138 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
139 struct fl_flow_mask *mask)
140 {
141 const long *lkey = fl_key_get_start(key, mask);
142 const long *lmask = fl_key_get_start(&mask->key, mask);
143 long *lmkey = fl_key_get_start(mkey, mask);
144 int i;
145
146 for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
147 *lmkey++ = *lkey++ & *lmask++;
148 }
149
150 static void fl_clear_masked_range(struct fl_flow_key *key,
151 struct fl_flow_mask *mask)
152 {
153 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
154 }
155
156 static struct cls_fl_filter *fl_lookup(struct fl_flow_mask *mask,
157 struct fl_flow_key *mkey)
158 {
159 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask),
160 mask->filter_ht_params);
161 }
162
163 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
164 struct tcf_result *res)
165 {
166 struct cls_fl_head *head = rcu_dereference_bh(tp->root);
167 struct cls_fl_filter *f;
168 struct fl_flow_mask *mask;
169 struct fl_flow_key skb_key;
170 struct fl_flow_key skb_mkey;
171
172 list_for_each_entry_rcu(mask, &head->masks, list) {
173 fl_clear_masked_range(&skb_key, mask);
174
175 skb_key.indev_ifindex = skb->skb_iif;
176 /* skb_flow_dissect() does not set n_proto in case an unknown
177 * protocol, so do it rather here.
178 */
179 skb_key.basic.n_proto = skb->protocol;
180 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key);
181 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0);
182
183 fl_set_masked_key(&skb_mkey, &skb_key, mask);
184
185 f = fl_lookup(mask, &skb_mkey);
186 if (f && !tc_skip_sw(f->flags)) {
187 *res = f->res;
188 return tcf_exts_exec(skb, &f->exts, res);
189 }
190 }
191 return -1;
192 }
193
194 static int fl_init(struct tcf_proto *tp)
195 {
196 struct cls_fl_head *head;
197
198 head = kzalloc(sizeof(*head), GFP_KERNEL);
199 if (!head)
200 return -ENOBUFS;
201
202 INIT_LIST_HEAD_RCU(&head->masks);
203 rcu_assign_pointer(tp->root, head);
204 idr_init(&head->handle_idr);
205
206 return rhashtable_init(&head->ht, &mask_ht_params);
207 }
208
209 static void fl_mask_free(struct fl_flow_mask *mask)
210 {
211 rhashtable_destroy(&mask->ht);
212 kfree(mask);
213 }
214
215 static void fl_mask_free_work(struct work_struct *work)
216 {
217 struct fl_flow_mask *mask = container_of(to_rcu_work(work),
218 struct fl_flow_mask, rwork);
219
220 fl_mask_free(mask);
221 }
222
223 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask,
224 bool async)
225 {
226 if (!list_empty(&mask->filters))
227 return false;
228
229 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
230 list_del_rcu(&mask->list);
231 if (async)
232 tcf_queue_work(&mask->rwork, fl_mask_free_work);
233 else
234 fl_mask_free(mask);
235
236 return true;
237 }
238
239 static void __fl_destroy_filter(struct cls_fl_filter *f)
240 {
241 tcf_exts_destroy(&f->exts);
242 tcf_exts_put_net(&f->exts);
243 kfree(f);
244 }
245
246 static void fl_destroy_filter_work(struct work_struct *work)
247 {
248 struct cls_fl_filter *f = container_of(to_rcu_work(work),
249 struct cls_fl_filter, rwork);
250
251 rtnl_lock();
252 __fl_destroy_filter(f);
253 rtnl_unlock();
254 }
255
256 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
257 struct netlink_ext_ack *extack)
258 {
259 struct tc_cls_flower_offload cls_flower = {};
260 struct tcf_block *block = tp->chain->block;
261
262 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
263 cls_flower.command = TC_CLSFLOWER_DESTROY;
264 cls_flower.cookie = (unsigned long) f;
265
266 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
267 &cls_flower, false);
268 tcf_block_offload_dec(block, &f->flags);
269 }
270
271 static int fl_hw_replace_filter(struct tcf_proto *tp,
272 struct cls_fl_filter *f,
273 struct netlink_ext_ack *extack)
274 {
275 struct tc_cls_flower_offload cls_flower = {};
276 struct tcf_block *block = tp->chain->block;
277 bool skip_sw = tc_skip_sw(f->flags);
278 int err;
279
280 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
281 cls_flower.command = TC_CLSFLOWER_REPLACE;
282 cls_flower.cookie = (unsigned long) f;
283 cls_flower.dissector = &f->mask->dissector;
284 cls_flower.mask = &f->mask->key;
285 cls_flower.key = &f->mkey;
286 cls_flower.exts = &f->exts;
287 cls_flower.classid = f->res.classid;
288
289 err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
290 &cls_flower, skip_sw);
291 if (err < 0) {
292 fl_hw_destroy_filter(tp, f, NULL);
293 return err;
294 } else if (err > 0) {
295 f->in_hw_count = err;
296 tcf_block_offload_inc(block, &f->flags);
297 }
298
299 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
300 return -EINVAL;
301
302 return 0;
303 }
304
305 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
306 {
307 struct tc_cls_flower_offload cls_flower = {};
308 struct tcf_block *block = tp->chain->block;
309
310 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
311 cls_flower.command = TC_CLSFLOWER_STATS;
312 cls_flower.cookie = (unsigned long) f;
313 cls_flower.exts = &f->exts;
314 cls_flower.classid = f->res.classid;
315
316 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
317 &cls_flower, false);
318 }
319
320 static bool __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
321 struct netlink_ext_ack *extack)
322 {
323 struct cls_fl_head *head = rtnl_dereference(tp->root);
324 bool async = tcf_exts_get_net(&f->exts);
325 bool last;
326
327 idr_remove(&head->handle_idr, f->handle);
328 list_del_rcu(&f->list);
329 last = fl_mask_put(head, f->mask, async);
330 if (!tc_skip_hw(f->flags))
331 fl_hw_destroy_filter(tp, f, extack);
332 tcf_unbind_filter(tp, &f->res);
333 if (async)
334 tcf_queue_work(&f->rwork, fl_destroy_filter_work);
335 else
336 __fl_destroy_filter(f);
337
338 return last;
339 }
340
341 static void fl_destroy_sleepable(struct work_struct *work)
342 {
343 struct cls_fl_head *head = container_of(to_rcu_work(work),
344 struct cls_fl_head,
345 rwork);
346
347 rhashtable_destroy(&head->ht);
348 kfree(head);
349 module_put(THIS_MODULE);
350 }
351
352 static void fl_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
353 {
354 struct cls_fl_head *head = rtnl_dereference(tp->root);
355 struct fl_flow_mask *mask, *next_mask;
356 struct cls_fl_filter *f, *next;
357
358 list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
359 list_for_each_entry_safe(f, next, &mask->filters, list) {
360 if (__fl_delete(tp, f, extack))
361 break;
362 }
363 }
364 idr_destroy(&head->handle_idr);
365
366 __module_get(THIS_MODULE);
367 tcf_queue_work(&head->rwork, fl_destroy_sleepable);
368 }
369
370 static void *fl_get(struct tcf_proto *tp, u32 handle)
371 {
372 struct cls_fl_head *head = rtnl_dereference(tp->root);
373
374 return idr_find(&head->handle_idr, handle);
375 }
376
377 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
378 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
379 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
380 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
381 .len = IFNAMSIZ },
382 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
383 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
384 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
385 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
386 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
387 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
388 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
389 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
390 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
391 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
392 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
393 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
394 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
395 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
396 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
397 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
398 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
399 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
400 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
401 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
402 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
403 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
404 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
405 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
406 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
407 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
408 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
409 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
410 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
411 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
412 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
413 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
414 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
415 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
416 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 },
417 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 },
418 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 },
419 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 },
420 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 },
421 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 },
422 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 },
423 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 },
424 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 },
425 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 },
426 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 },
427 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
428 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 },
429 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
430 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 },
431 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
432 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 },
433 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
434 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 },
435 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 },
436 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 },
437 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 },
438 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 },
439 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 },
440 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN },
441 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN },
442 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN },
443 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN },
444 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 },
445 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 },
446 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 },
447 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 },
448 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 },
449 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
450 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 },
451 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 },
452 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 },
453 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 },
454 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 },
455 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 },
456 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 },
457 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 },
458 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
459 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 },
460 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
461 };
462
463 static void fl_set_key_val(struct nlattr **tb,
464 void *val, int val_type,
465 void *mask, int mask_type, int len)
466 {
467 if (!tb[val_type])
468 return;
469 memcpy(val, nla_data(tb[val_type]), len);
470 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
471 memset(mask, 0xff, len);
472 else
473 memcpy(mask, nla_data(tb[mask_type]), len);
474 }
475
476 static int fl_set_key_mpls(struct nlattr **tb,
477 struct flow_dissector_key_mpls *key_val,
478 struct flow_dissector_key_mpls *key_mask)
479 {
480 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
481 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
482 key_mask->mpls_ttl = MPLS_TTL_MASK;
483 }
484 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
485 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
486
487 if (bos & ~MPLS_BOS_MASK)
488 return -EINVAL;
489 key_val->mpls_bos = bos;
490 key_mask->mpls_bos = MPLS_BOS_MASK;
491 }
492 if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
493 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
494
495 if (tc & ~MPLS_TC_MASK)
496 return -EINVAL;
497 key_val->mpls_tc = tc;
498 key_mask->mpls_tc = MPLS_TC_MASK;
499 }
500 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
501 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
502
503 if (label & ~MPLS_LABEL_MASK)
504 return -EINVAL;
505 key_val->mpls_label = label;
506 key_mask->mpls_label = MPLS_LABEL_MASK;
507 }
508 return 0;
509 }
510
511 static void fl_set_key_vlan(struct nlattr **tb,
512 __be16 ethertype,
513 int vlan_id_key, int vlan_prio_key,
514 struct flow_dissector_key_vlan *key_val,
515 struct flow_dissector_key_vlan *key_mask)
516 {
517 #define VLAN_PRIORITY_MASK 0x7
518
519 if (tb[vlan_id_key]) {
520 key_val->vlan_id =
521 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
522 key_mask->vlan_id = VLAN_VID_MASK;
523 }
524 if (tb[vlan_prio_key]) {
525 key_val->vlan_priority =
526 nla_get_u8(tb[vlan_prio_key]) &
527 VLAN_PRIORITY_MASK;
528 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
529 }
530 key_val->vlan_tpid = ethertype;
531 key_mask->vlan_tpid = cpu_to_be16(~0);
532 }
533
534 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
535 u32 *dissector_key, u32 *dissector_mask,
536 u32 flower_flag_bit, u32 dissector_flag_bit)
537 {
538 if (flower_mask & flower_flag_bit) {
539 *dissector_mask |= dissector_flag_bit;
540 if (flower_key & flower_flag_bit)
541 *dissector_key |= dissector_flag_bit;
542 }
543 }
544
545 static int fl_set_key_flags(struct nlattr **tb,
546 u32 *flags_key, u32 *flags_mask)
547 {
548 u32 key, mask;
549
550 /* mask is mandatory for flags */
551 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
552 return -EINVAL;
553
554 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
555 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
556
557 *flags_key = 0;
558 *flags_mask = 0;
559
560 fl_set_key_flag(key, mask, flags_key, flags_mask,
561 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
562 fl_set_key_flag(key, mask, flags_key, flags_mask,
563 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
564 FLOW_DIS_FIRST_FRAG);
565
566 return 0;
567 }
568
569 static void fl_set_key_ip(struct nlattr **tb, bool encap,
570 struct flow_dissector_key_ip *key,
571 struct flow_dissector_key_ip *mask)
572 {
573 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
574 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
575 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
576 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
577
578 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
579 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
580 }
581
582 static int fl_set_key(struct net *net, struct nlattr **tb,
583 struct fl_flow_key *key, struct fl_flow_key *mask,
584 struct netlink_ext_ack *extack)
585 {
586 __be16 ethertype;
587 int ret = 0;
588 #ifdef CONFIG_NET_CLS_IND
589 if (tb[TCA_FLOWER_INDEV]) {
590 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
591 if (err < 0)
592 return err;
593 key->indev_ifindex = err;
594 mask->indev_ifindex = 0xffffffff;
595 }
596 #endif
597
598 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
599 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
600 sizeof(key->eth.dst));
601 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
602 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
603 sizeof(key->eth.src));
604
605 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
606 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
607
608 if (eth_type_vlan(ethertype)) {
609 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
610 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan,
611 &mask->vlan);
612
613 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) {
614 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]);
615 if (eth_type_vlan(ethertype)) {
616 fl_set_key_vlan(tb, ethertype,
617 TCA_FLOWER_KEY_CVLAN_ID,
618 TCA_FLOWER_KEY_CVLAN_PRIO,
619 &key->cvlan, &mask->cvlan);
620 fl_set_key_val(tb, &key->basic.n_proto,
621 TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
622 &mask->basic.n_proto,
623 TCA_FLOWER_UNSPEC,
624 sizeof(key->basic.n_proto));
625 } else {
626 key->basic.n_proto = ethertype;
627 mask->basic.n_proto = cpu_to_be16(~0);
628 }
629 }
630 } else {
631 key->basic.n_proto = ethertype;
632 mask->basic.n_proto = cpu_to_be16(~0);
633 }
634 }
635
636 if (key->basic.n_proto == htons(ETH_P_IP) ||
637 key->basic.n_proto == htons(ETH_P_IPV6)) {
638 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
639 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
640 sizeof(key->basic.ip_proto));
641 fl_set_key_ip(tb, false, &key->ip, &mask->ip);
642 }
643
644 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
645 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
646 mask->control.addr_type = ~0;
647 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
648 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
649 sizeof(key->ipv4.src));
650 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
651 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
652 sizeof(key->ipv4.dst));
653 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
654 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
655 mask->control.addr_type = ~0;
656 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
657 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
658 sizeof(key->ipv6.src));
659 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
660 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
661 sizeof(key->ipv6.dst));
662 }
663
664 if (key->basic.ip_proto == IPPROTO_TCP) {
665 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
666 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
667 sizeof(key->tp.src));
668 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
669 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
670 sizeof(key->tp.dst));
671 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
672 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
673 sizeof(key->tcp.flags));
674 } else if (key->basic.ip_proto == IPPROTO_UDP) {
675 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
676 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
677 sizeof(key->tp.src));
678 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
679 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
680 sizeof(key->tp.dst));
681 } else if (key->basic.ip_proto == IPPROTO_SCTP) {
682 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
683 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
684 sizeof(key->tp.src));
685 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
686 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
687 sizeof(key->tp.dst));
688 } else if (key->basic.n_proto == htons(ETH_P_IP) &&
689 key->basic.ip_proto == IPPROTO_ICMP) {
690 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
691 &mask->icmp.type,
692 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
693 sizeof(key->icmp.type));
694 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
695 &mask->icmp.code,
696 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
697 sizeof(key->icmp.code));
698 } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
699 key->basic.ip_proto == IPPROTO_ICMPV6) {
700 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
701 &mask->icmp.type,
702 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
703 sizeof(key->icmp.type));
704 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
705 &mask->icmp.code,
706 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
707 sizeof(key->icmp.code));
708 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
709 key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
710 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
711 if (ret)
712 return ret;
713 } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
714 key->basic.n_proto == htons(ETH_P_RARP)) {
715 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
716 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
717 sizeof(key->arp.sip));
718 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
719 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
720 sizeof(key->arp.tip));
721 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
722 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
723 sizeof(key->arp.op));
724 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
725 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
726 sizeof(key->arp.sha));
727 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
728 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
729 sizeof(key->arp.tha));
730 }
731
732 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
733 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
734 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
735 mask->enc_control.addr_type = ~0;
736 fl_set_key_val(tb, &key->enc_ipv4.src,
737 TCA_FLOWER_KEY_ENC_IPV4_SRC,
738 &mask->enc_ipv4.src,
739 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
740 sizeof(key->enc_ipv4.src));
741 fl_set_key_val(tb, &key->enc_ipv4.dst,
742 TCA_FLOWER_KEY_ENC_IPV4_DST,
743 &mask->enc_ipv4.dst,
744 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
745 sizeof(key->enc_ipv4.dst));
746 }
747
748 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
749 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
750 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
751 mask->enc_control.addr_type = ~0;
752 fl_set_key_val(tb, &key->enc_ipv6.src,
753 TCA_FLOWER_KEY_ENC_IPV6_SRC,
754 &mask->enc_ipv6.src,
755 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
756 sizeof(key->enc_ipv6.src));
757 fl_set_key_val(tb, &key->enc_ipv6.dst,
758 TCA_FLOWER_KEY_ENC_IPV6_DST,
759 &mask->enc_ipv6.dst,
760 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
761 sizeof(key->enc_ipv6.dst));
762 }
763
764 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
765 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
766 sizeof(key->enc_key_id.keyid));
767
768 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
769 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
770 sizeof(key->enc_tp.src));
771
772 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
773 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
774 sizeof(key->enc_tp.dst));
775
776 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
777
778 if (tb[TCA_FLOWER_KEY_FLAGS])
779 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
780
781 return ret;
782 }
783
784 static void fl_mask_copy(struct fl_flow_mask *dst,
785 struct fl_flow_mask *src)
786 {
787 const void *psrc = fl_key_get_start(&src->key, src);
788 void *pdst = fl_key_get_start(&dst->key, src);
789
790 memcpy(pdst, psrc, fl_mask_range(src));
791 dst->range = src->range;
792 }
793
794 static const struct rhashtable_params fl_ht_params = {
795 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
796 .head_offset = offsetof(struct cls_fl_filter, ht_node),
797 .automatic_shrinking = true,
798 };
799
800 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
801 {
802 mask->filter_ht_params = fl_ht_params;
803 mask->filter_ht_params.key_len = fl_mask_range(mask);
804 mask->filter_ht_params.key_offset += mask->range.start;
805
806 return rhashtable_init(&mask->ht, &mask->filter_ht_params);
807 }
808
809 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
810 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
811
812 #define FL_KEY_IS_MASKED(mask, member) \
813 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
814 0, FL_KEY_MEMBER_SIZE(member)) \
815
816 #define FL_KEY_SET(keys, cnt, id, member) \
817 do { \
818 keys[cnt].key_id = id; \
819 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
820 cnt++; \
821 } while(0);
822
823 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
824 do { \
825 if (FL_KEY_IS_MASKED(mask, member)) \
826 FL_KEY_SET(keys, cnt, id, member); \
827 } while(0);
828
829 static void fl_init_dissector(struct fl_flow_mask *mask)
830 {
831 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
832 size_t cnt = 0;
833
834 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
835 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
836 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
837 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
838 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
839 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
840 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
841 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
842 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
843 FLOW_DISSECTOR_KEY_PORTS, tp);
844 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
845 FLOW_DISSECTOR_KEY_IP, ip);
846 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
847 FLOW_DISSECTOR_KEY_TCP, tcp);
848 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
849 FLOW_DISSECTOR_KEY_ICMP, icmp);
850 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
851 FLOW_DISSECTOR_KEY_ARP, arp);
852 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
853 FLOW_DISSECTOR_KEY_MPLS, mpls);
854 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
855 FLOW_DISSECTOR_KEY_VLAN, vlan);
856 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
857 FLOW_DISSECTOR_KEY_CVLAN, cvlan);
858 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
859 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
860 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
861 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
862 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
863 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
864 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
865 FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
866 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
867 enc_control);
868 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
869 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
870 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
871 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
872
873 skb_flow_dissector_init(&mask->dissector, keys, cnt);
874 }
875
876 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
877 struct fl_flow_mask *mask)
878 {
879 struct fl_flow_mask *newmask;
880 int err;
881
882 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
883 if (!newmask)
884 return ERR_PTR(-ENOMEM);
885
886 fl_mask_copy(newmask, mask);
887
888 err = fl_init_mask_hashtable(newmask);
889 if (err)
890 goto errout_free;
891
892 fl_init_dissector(newmask);
893
894 INIT_LIST_HEAD_RCU(&newmask->filters);
895
896 err = rhashtable_insert_fast(&head->ht, &newmask->ht_node,
897 mask_ht_params);
898 if (err)
899 goto errout_destroy;
900
901 list_add_tail_rcu(&newmask->list, &head->masks);
902
903 return newmask;
904
905 errout_destroy:
906 rhashtable_destroy(&newmask->ht);
907 errout_free:
908 kfree(newmask);
909
910 return ERR_PTR(err);
911 }
912
913 static int fl_check_assign_mask(struct cls_fl_head *head,
914 struct cls_fl_filter *fnew,
915 struct cls_fl_filter *fold,
916 struct fl_flow_mask *mask)
917 {
918 struct fl_flow_mask *newmask;
919
920 fnew->mask = rhashtable_lookup_fast(&head->ht, mask, mask_ht_params);
921 if (!fnew->mask) {
922 if (fold)
923 return -EINVAL;
924
925 newmask = fl_create_new_mask(head, mask);
926 if (IS_ERR(newmask))
927 return PTR_ERR(newmask);
928
929 fnew->mask = newmask;
930 } else if (fold && fold->mask != fnew->mask) {
931 return -EINVAL;
932 }
933
934 return 0;
935 }
936
937 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
938 struct cls_fl_filter *f, struct fl_flow_mask *mask,
939 unsigned long base, struct nlattr **tb,
940 struct nlattr *est, bool ovr,
941 struct netlink_ext_ack *extack)
942 {
943 int err;
944
945 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack);
946 if (err < 0)
947 return err;
948
949 if (tb[TCA_FLOWER_CLASSID]) {
950 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
951 tcf_bind_filter(tp, &f->res, base);
952 }
953
954 err = fl_set_key(net, tb, &f->key, &mask->key, extack);
955 if (err)
956 return err;
957
958 fl_mask_update_range(mask);
959 fl_set_masked_key(&f->mkey, &f->key, mask);
960
961 return 0;
962 }
963
964 static int fl_change(struct net *net, struct sk_buff *in_skb,
965 struct tcf_proto *tp, unsigned long base,
966 u32 handle, struct nlattr **tca,
967 void **arg, bool ovr, struct netlink_ext_ack *extack)
968 {
969 struct cls_fl_head *head = rtnl_dereference(tp->root);
970 struct cls_fl_filter *fold = *arg;
971 struct cls_fl_filter *fnew;
972 struct nlattr **tb;
973 struct fl_flow_mask mask = {};
974 int err;
975
976 if (!tca[TCA_OPTIONS])
977 return -EINVAL;
978
979 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
980 if (!tb)
981 return -ENOBUFS;
982
983 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
984 fl_policy, NULL);
985 if (err < 0)
986 goto errout_tb;
987
988 if (fold && handle && fold->handle != handle) {
989 err = -EINVAL;
990 goto errout_tb;
991 }
992
993 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
994 if (!fnew) {
995 err = -ENOBUFS;
996 goto errout_tb;
997 }
998
999 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
1000 if (err < 0)
1001 goto errout;
1002
1003 if (!handle) {
1004 handle = 1;
1005 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1006 INT_MAX, GFP_KERNEL);
1007 } else if (!fold) {
1008 /* user specifies a handle and it doesn't exist */
1009 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1010 handle, GFP_KERNEL);
1011 }
1012 if (err)
1013 goto errout;
1014 fnew->handle = handle;
1015
1016 if (tb[TCA_FLOWER_FLAGS]) {
1017 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
1018
1019 if (!tc_flags_valid(fnew->flags)) {
1020 err = -EINVAL;
1021 goto errout_idr;
1022 }
1023 }
1024
1025 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr,
1026 extack);
1027 if (err)
1028 goto errout_idr;
1029
1030 err = fl_check_assign_mask(head, fnew, fold, &mask);
1031 if (err)
1032 goto errout_idr;
1033
1034 if (!tc_skip_sw(fnew->flags)) {
1035 if (!fold && fl_lookup(fnew->mask, &fnew->mkey)) {
1036 err = -EEXIST;
1037 goto errout_mask;
1038 }
1039
1040 err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node,
1041 fnew->mask->filter_ht_params);
1042 if (err)
1043 goto errout_mask;
1044 }
1045
1046 if (!tc_skip_hw(fnew->flags)) {
1047 err = fl_hw_replace_filter(tp, fnew, extack);
1048 if (err)
1049 goto errout_mask;
1050 }
1051
1052 if (!tc_in_hw(fnew->flags))
1053 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
1054
1055 if (fold) {
1056 if (!tc_skip_sw(fold->flags))
1057 rhashtable_remove_fast(&fold->mask->ht,
1058 &fold->ht_node,
1059 fold->mask->filter_ht_params);
1060 if (!tc_skip_hw(fold->flags))
1061 fl_hw_destroy_filter(tp, fold, NULL);
1062 }
1063
1064 *arg = fnew;
1065
1066 if (fold) {
1067 idr_replace(&head->handle_idr, fnew, fnew->handle);
1068 list_replace_rcu(&fold->list, &fnew->list);
1069 tcf_unbind_filter(tp, &fold->res);
1070 tcf_exts_get_net(&fold->exts);
1071 tcf_queue_work(&fold->rwork, fl_destroy_filter_work);
1072 } else {
1073 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
1074 }
1075
1076 kfree(tb);
1077 return 0;
1078
1079 errout_mask:
1080 fl_mask_put(head, fnew->mask, false);
1081
1082 errout_idr:
1083 if (!fold)
1084 idr_remove(&head->handle_idr, fnew->handle);
1085 errout:
1086 tcf_exts_destroy(&fnew->exts);
1087 kfree(fnew);
1088 errout_tb:
1089 kfree(tb);
1090 return err;
1091 }
1092
1093 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
1094 struct netlink_ext_ack *extack)
1095 {
1096 struct cls_fl_head *head = rtnl_dereference(tp->root);
1097 struct cls_fl_filter *f = arg;
1098
1099 if (!tc_skip_sw(f->flags))
1100 rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
1101 f->mask->filter_ht_params);
1102 __fl_delete(tp, f, extack);
1103 *last = list_empty(&head->masks);
1104 return 0;
1105 }
1106
1107 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
1108 {
1109 struct cls_fl_head *head = rtnl_dereference(tp->root);
1110 struct cls_fl_filter *f;
1111
1112 arg->count = arg->skip;
1113
1114 while ((f = idr_get_next_ul(&head->handle_idr,
1115 &arg->cookie)) != NULL) {
1116 if (arg->fn(tp, f, arg) < 0) {
1117 arg->stop = 1;
1118 break;
1119 }
1120 arg->cookie = f->handle + 1;
1121 arg->count++;
1122 }
1123 }
1124
1125 static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
1126 void *cb_priv, struct netlink_ext_ack *extack)
1127 {
1128 struct cls_fl_head *head = rtnl_dereference(tp->root);
1129 struct tc_cls_flower_offload cls_flower = {};
1130 struct tcf_block *block = tp->chain->block;
1131 struct fl_flow_mask *mask;
1132 struct cls_fl_filter *f;
1133 int err;
1134
1135 list_for_each_entry(mask, &head->masks, list) {
1136 list_for_each_entry(f, &mask->filters, list) {
1137 if (tc_skip_hw(f->flags))
1138 continue;
1139
1140 tc_cls_common_offload_init(&cls_flower.common, tp,
1141 f->flags, extack);
1142 cls_flower.command = add ?
1143 TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY;
1144 cls_flower.cookie = (unsigned long)f;
1145 cls_flower.dissector = &mask->dissector;
1146 cls_flower.mask = &f->mkey;
1147 cls_flower.key = &f->key;
1148 cls_flower.exts = &f->exts;
1149 cls_flower.classid = f->res.classid;
1150
1151 err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv);
1152 if (err) {
1153 if (add && tc_skip_sw(f->flags))
1154 return err;
1155 continue;
1156 }
1157
1158 tc_cls_offload_cnt_update(block, &f->in_hw_count,
1159 &f->flags, add);
1160 }
1161 }
1162
1163 return 0;
1164 }
1165
1166 static int fl_dump_key_val(struct sk_buff *skb,
1167 void *val, int val_type,
1168 void *mask, int mask_type, int len)
1169 {
1170 int err;
1171
1172 if (!memchr_inv(mask, 0, len))
1173 return 0;
1174 err = nla_put(skb, val_type, len, val);
1175 if (err)
1176 return err;
1177 if (mask_type != TCA_FLOWER_UNSPEC) {
1178 err = nla_put(skb, mask_type, len, mask);
1179 if (err)
1180 return err;
1181 }
1182 return 0;
1183 }
1184
1185 static int fl_dump_key_mpls(struct sk_buff *skb,
1186 struct flow_dissector_key_mpls *mpls_key,
1187 struct flow_dissector_key_mpls *mpls_mask)
1188 {
1189 int err;
1190
1191 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
1192 return 0;
1193 if (mpls_mask->mpls_ttl) {
1194 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
1195 mpls_key->mpls_ttl);
1196 if (err)
1197 return err;
1198 }
1199 if (mpls_mask->mpls_tc) {
1200 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
1201 mpls_key->mpls_tc);
1202 if (err)
1203 return err;
1204 }
1205 if (mpls_mask->mpls_label) {
1206 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
1207 mpls_key->mpls_label);
1208 if (err)
1209 return err;
1210 }
1211 if (mpls_mask->mpls_bos) {
1212 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
1213 mpls_key->mpls_bos);
1214 if (err)
1215 return err;
1216 }
1217 return 0;
1218 }
1219
1220 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
1221 struct flow_dissector_key_ip *key,
1222 struct flow_dissector_key_ip *mask)
1223 {
1224 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
1225 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
1226 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
1227 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
1228
1229 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
1230 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
1231 return -1;
1232
1233 return 0;
1234 }
1235
1236 static int fl_dump_key_vlan(struct sk_buff *skb,
1237 int vlan_id_key, int vlan_prio_key,
1238 struct flow_dissector_key_vlan *vlan_key,
1239 struct flow_dissector_key_vlan *vlan_mask)
1240 {
1241 int err;
1242
1243 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1244 return 0;
1245 if (vlan_mask->vlan_id) {
1246 err = nla_put_u16(skb, vlan_id_key,
1247 vlan_key->vlan_id);
1248 if (err)
1249 return err;
1250 }
1251 if (vlan_mask->vlan_priority) {
1252 err = nla_put_u8(skb, vlan_prio_key,
1253 vlan_key->vlan_priority);
1254 if (err)
1255 return err;
1256 }
1257 return 0;
1258 }
1259
1260 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1261 u32 *flower_key, u32 *flower_mask,
1262 u32 flower_flag_bit, u32 dissector_flag_bit)
1263 {
1264 if (dissector_mask & dissector_flag_bit) {
1265 *flower_mask |= flower_flag_bit;
1266 if (dissector_key & dissector_flag_bit)
1267 *flower_key |= flower_flag_bit;
1268 }
1269 }
1270
1271 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1272 {
1273 u32 key, mask;
1274 __be32 _key, _mask;
1275 int err;
1276
1277 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1278 return 0;
1279
1280 key = 0;
1281 mask = 0;
1282
1283 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1284 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1285 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1286 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1287 FLOW_DIS_FIRST_FRAG);
1288
1289 _key = cpu_to_be32(key);
1290 _mask = cpu_to_be32(mask);
1291
1292 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1293 if (err)
1294 return err;
1295
1296 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1297 }
1298
1299 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
1300 struct sk_buff *skb, struct tcmsg *t)
1301 {
1302 struct cls_fl_filter *f = fh;
1303 struct nlattr *nest;
1304 struct fl_flow_key *key, *mask;
1305
1306 if (!f)
1307 return skb->len;
1308
1309 t->tcm_handle = f->handle;
1310
1311 nest = nla_nest_start(skb, TCA_OPTIONS);
1312 if (!nest)
1313 goto nla_put_failure;
1314
1315 if (f->res.classid &&
1316 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
1317 goto nla_put_failure;
1318
1319 key = &f->key;
1320 mask = &f->mask->key;
1321
1322 if (mask->indev_ifindex) {
1323 struct net_device *dev;
1324
1325 dev = __dev_get_by_index(net, key->indev_ifindex);
1326 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1327 goto nla_put_failure;
1328 }
1329
1330 if (!tc_skip_hw(f->flags))
1331 fl_hw_update_stats(tp, f);
1332
1333 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1334 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1335 sizeof(key->eth.dst)) ||
1336 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1337 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1338 sizeof(key->eth.src)) ||
1339 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1340 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1341 sizeof(key->basic.n_proto)))
1342 goto nla_put_failure;
1343
1344 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
1345 goto nla_put_failure;
1346
1347 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
1348 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
1349 goto nla_put_failure;
1350
1351 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
1352 TCA_FLOWER_KEY_CVLAN_PRIO,
1353 &key->cvlan, &mask->cvlan) ||
1354 (mask->cvlan.vlan_tpid &&
1355 nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1356 key->cvlan.vlan_tpid)))
1357 goto nla_put_failure;
1358
1359 if (mask->basic.n_proto) {
1360 if (mask->cvlan.vlan_tpid) {
1361 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1362 key->basic.n_proto))
1363 goto nla_put_failure;
1364 } else if (mask->vlan.vlan_tpid) {
1365 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1366 key->basic.n_proto))
1367 goto nla_put_failure;
1368 }
1369 }
1370
1371 if ((key->basic.n_proto == htons(ETH_P_IP) ||
1372 key->basic.n_proto == htons(ETH_P_IPV6)) &&
1373 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1374 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1375 sizeof(key->basic.ip_proto)) ||
1376 fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
1377 goto nla_put_failure;
1378
1379 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1380 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1381 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1382 sizeof(key->ipv4.src)) ||
1383 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1384 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1385 sizeof(key->ipv4.dst))))
1386 goto nla_put_failure;
1387 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1388 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1389 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1390 sizeof(key->ipv6.src)) ||
1391 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1392 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1393 sizeof(key->ipv6.dst))))
1394 goto nla_put_failure;
1395
1396 if (key->basic.ip_proto == IPPROTO_TCP &&
1397 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1398 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1399 sizeof(key->tp.src)) ||
1400 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1401 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1402 sizeof(key->tp.dst)) ||
1403 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1404 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1405 sizeof(key->tcp.flags))))
1406 goto nla_put_failure;
1407 else if (key->basic.ip_proto == IPPROTO_UDP &&
1408 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1409 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1410 sizeof(key->tp.src)) ||
1411 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1412 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1413 sizeof(key->tp.dst))))
1414 goto nla_put_failure;
1415 else if (key->basic.ip_proto == IPPROTO_SCTP &&
1416 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1417 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1418 sizeof(key->tp.src)) ||
1419 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1420 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1421 sizeof(key->tp.dst))))
1422 goto nla_put_failure;
1423 else if (key->basic.n_proto == htons(ETH_P_IP) &&
1424 key->basic.ip_proto == IPPROTO_ICMP &&
1425 (fl_dump_key_val(skb, &key->icmp.type,
1426 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1427 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1428 sizeof(key->icmp.type)) ||
1429 fl_dump_key_val(skb, &key->icmp.code,
1430 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1431 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1432 sizeof(key->icmp.code))))
1433 goto nla_put_failure;
1434 else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1435 key->basic.ip_proto == IPPROTO_ICMPV6 &&
1436 (fl_dump_key_val(skb, &key->icmp.type,
1437 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1438 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1439 sizeof(key->icmp.type)) ||
1440 fl_dump_key_val(skb, &key->icmp.code,
1441 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1442 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1443 sizeof(key->icmp.code))))
1444 goto nla_put_failure;
1445 else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1446 key->basic.n_proto == htons(ETH_P_RARP)) &&
1447 (fl_dump_key_val(skb, &key->arp.sip,
1448 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1449 TCA_FLOWER_KEY_ARP_SIP_MASK,
1450 sizeof(key->arp.sip)) ||
1451 fl_dump_key_val(skb, &key->arp.tip,
1452 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1453 TCA_FLOWER_KEY_ARP_TIP_MASK,
1454 sizeof(key->arp.tip)) ||
1455 fl_dump_key_val(skb, &key->arp.op,
1456 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1457 TCA_FLOWER_KEY_ARP_OP_MASK,
1458 sizeof(key->arp.op)) ||
1459 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1460 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1461 sizeof(key->arp.sha)) ||
1462 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1463 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1464 sizeof(key->arp.tha))))
1465 goto nla_put_failure;
1466
1467 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1468 (fl_dump_key_val(skb, &key->enc_ipv4.src,
1469 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1470 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1471 sizeof(key->enc_ipv4.src)) ||
1472 fl_dump_key_val(skb, &key->enc_ipv4.dst,
1473 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1474 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1475 sizeof(key->enc_ipv4.dst))))
1476 goto nla_put_failure;
1477 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1478 (fl_dump_key_val(skb, &key->enc_ipv6.src,
1479 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1480 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1481 sizeof(key->enc_ipv6.src)) ||
1482 fl_dump_key_val(skb, &key->enc_ipv6.dst,
1483 TCA_FLOWER_KEY_ENC_IPV6_DST,
1484 &mask->enc_ipv6.dst,
1485 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1486 sizeof(key->enc_ipv6.dst))))
1487 goto nla_put_failure;
1488
1489 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1490 &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1491 sizeof(key->enc_key_id)) ||
1492 fl_dump_key_val(skb, &key->enc_tp.src,
1493 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1494 &mask->enc_tp.src,
1495 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1496 sizeof(key->enc_tp.src)) ||
1497 fl_dump_key_val(skb, &key->enc_tp.dst,
1498 TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1499 &mask->enc_tp.dst,
1500 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1501 sizeof(key->enc_tp.dst)) ||
1502 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip))
1503 goto nla_put_failure;
1504
1505 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1506 goto nla_put_failure;
1507
1508 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
1509 goto nla_put_failure;
1510
1511 if (tcf_exts_dump(skb, &f->exts))
1512 goto nla_put_failure;
1513
1514 nla_nest_end(skb, nest);
1515
1516 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
1517 goto nla_put_failure;
1518
1519 return skb->len;
1520
1521 nla_put_failure:
1522 nla_nest_cancel(skb, nest);
1523 return -1;
1524 }
1525
1526 static void fl_bind_class(void *fh, u32 classid, unsigned long cl)
1527 {
1528 struct cls_fl_filter *f = fh;
1529
1530 if (f && f->res.classid == classid)
1531 f->res.class = cl;
1532 }
1533
1534 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1535 .kind = "flower",
1536 .classify = fl_classify,
1537 .init = fl_init,
1538 .destroy = fl_destroy,
1539 .get = fl_get,
1540 .change = fl_change,
1541 .delete = fl_delete,
1542 .walk = fl_walk,
1543 .reoffload = fl_reoffload,
1544 .dump = fl_dump,
1545 .bind_class = fl_bind_class,
1546 .owner = THIS_MODULE,
1547 };
1548
1549 static int __init cls_fl_init(void)
1550 {
1551 return register_tcf_proto_ops(&cls_fl_ops);
1552 }
1553
1554 static void __exit cls_fl_exit(void)
1555 {
1556 unregister_tcf_proto_ops(&cls_fl_ops);
1557 }
1558
1559 module_init(cls_fl_init);
1560 module_exit(cls_fl_exit);
1561
1562 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
1563 MODULE_DESCRIPTION("Flower classifier");
1564 MODULE_LICENSE("GPL v2");
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