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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
31struct 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 union {
39 struct flow_dissector_key_ipv4_addrs ipv4;
40 struct flow_dissector_key_ipv6_addrs ipv6;
41 };
42 struct flow_dissector_key_ports tp;
43 struct flow_dissector_key_icmp icmp;
44 struct flow_dissector_key_arp arp;
45 struct flow_dissector_key_keyid enc_key_id;
46 union {
47 struct flow_dissector_key_ipv4_addrs enc_ipv4;
48 struct flow_dissector_key_ipv6_addrs enc_ipv6;
49 };
50 struct flow_dissector_key_ports enc_tp;
51 struct flow_dissector_key_mpls mpls;
52 struct flow_dissector_key_tcp tcp;
53 struct flow_dissector_key_ip ip;
54} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
55
56struct fl_flow_mask_range {
57 unsigned short int start;
58 unsigned short int end;
59};
60
61struct fl_flow_mask {
62 struct fl_flow_key key;
63 struct fl_flow_mask_range range;
64 struct rcu_head rcu;
65};
66
67struct cls_fl_head {
68 struct rhashtable ht;
69 struct fl_flow_mask mask;
70 struct flow_dissector dissector;
71 bool mask_assigned;
72 struct list_head filters;
73 struct rhashtable_params ht_params;
74 union {
75 struct work_struct work;
76 struct rcu_head rcu;
77 };
78 struct idr handle_idr;
79};
80
81struct cls_fl_filter {
82 struct rhash_head ht_node;
83 struct fl_flow_key mkey;
84 struct tcf_exts exts;
85 struct tcf_result res;
86 struct fl_flow_key key;
87 struct list_head list;
88 u32 handle;
89 u32 flags;
90 union {
91 struct work_struct work;
92 struct rcu_head rcu;
93 };
94 struct net_device *hw_dev;
95};
96
97static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
98{
99 return mask->range.end - mask->range.start;
100}
101
102static void fl_mask_update_range(struct fl_flow_mask *mask)
103{
104 const u8 *bytes = (const u8 *) &mask->key;
105 size_t size = sizeof(mask->key);
106 size_t i, first = 0, last = size - 1;
107
108 for (i = 0; i < sizeof(mask->key); i++) {
109 if (bytes[i]) {
110 if (!first && i)
111 first = i;
112 last = i;
113 }
114 }
115 mask->range.start = rounddown(first, sizeof(long));
116 mask->range.end = roundup(last + 1, sizeof(long));
117}
118
119static void *fl_key_get_start(struct fl_flow_key *key,
120 const struct fl_flow_mask *mask)
121{
122 return (u8 *) key + mask->range.start;
123}
124
125static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
126 struct fl_flow_mask *mask)
127{
128 const long *lkey = fl_key_get_start(key, mask);
129 const long *lmask = fl_key_get_start(&mask->key, mask);
130 long *lmkey = fl_key_get_start(mkey, mask);
131 int i;
132
133 for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
134 *lmkey++ = *lkey++ & *lmask++;
135}
136
137static void fl_clear_masked_range(struct fl_flow_key *key,
138 struct fl_flow_mask *mask)
139{
140 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
141}
142
143static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head,
144 struct fl_flow_key *mkey)
145{
146 return rhashtable_lookup_fast(&head->ht,
147 fl_key_get_start(mkey, &head->mask),
148 head->ht_params);
149}
150
151static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
152 struct tcf_result *res)
153{
154 struct cls_fl_head *head = rcu_dereference_bh(tp->root);
155 struct cls_fl_filter *f;
156 struct fl_flow_key skb_key;
157 struct fl_flow_key skb_mkey;
158
159 if (!atomic_read(&head->ht.nelems))
160 return -1;
161
162 fl_clear_masked_range(&skb_key, &head->mask);
163
164 skb_key.indev_ifindex = skb->skb_iif;
165 /* skb_flow_dissect() does not set n_proto in case an unknown protocol,
166 * so do it rather here.
167 */
168 skb_key.basic.n_proto = skb->protocol;
169 skb_flow_dissect_tunnel_info(skb, &head->dissector, &skb_key);
170 skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
171
172 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
173
174 f = fl_lookup(head, &skb_mkey);
175 if (f && !tc_skip_sw(f->flags)) {
176 *res = f->res;
177 return tcf_exts_exec(skb, &f->exts, res);
178 }
179 return -1;
180}
181
182static int fl_init(struct tcf_proto *tp)
183{
184 struct cls_fl_head *head;
185
186 head = kzalloc(sizeof(*head), GFP_KERNEL);
187 if (!head)
188 return -ENOBUFS;
189
190 INIT_LIST_HEAD_RCU(&head->filters);
191 rcu_assign_pointer(tp->root, head);
192 idr_init(&head->handle_idr);
193
194 return 0;
195}
196
197static void __fl_destroy_filter(struct cls_fl_filter *f)
198{
199 tcf_exts_destroy(&f->exts);
200 tcf_exts_put_net(&f->exts);
201 kfree(f);
202}
203
204static void fl_destroy_filter_work(struct work_struct *work)
205{
206 struct cls_fl_filter *f = container_of(work, struct cls_fl_filter, work);
207
208 rtnl_lock();
209 __fl_destroy_filter(f);
210 rtnl_unlock();
211}
212
213static void fl_destroy_filter(struct rcu_head *head)
214{
215 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
216
217 INIT_WORK(&f->work, fl_destroy_filter_work);
218 tcf_queue_work(&f->work);
219}
220
221static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
222 struct netlink_ext_ack *extack)
223{
224 struct tc_cls_flower_offload cls_flower = {};
225 struct tcf_block *block = tp->chain->block;
226
227 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
228 cls_flower.command = TC_CLSFLOWER_DESTROY;
229 cls_flower.cookie = (unsigned long) f;
230
231 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
232 &cls_flower, false);
233 tcf_block_offload_dec(block, &f->flags);
234}
235
236static int fl_hw_replace_filter(struct tcf_proto *tp,
237 struct flow_dissector *dissector,
238 struct fl_flow_key *mask,
239 struct cls_fl_filter *f,
240 struct netlink_ext_ack *extack)
241{
242 struct tc_cls_flower_offload cls_flower = {};
243 struct tcf_block *block = tp->chain->block;
244 bool skip_sw = tc_skip_sw(f->flags);
245 int err;
246
247 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
248 cls_flower.command = TC_CLSFLOWER_REPLACE;
249 cls_flower.cookie = (unsigned long) f;
250 cls_flower.dissector = dissector;
251 cls_flower.mask = mask;
252 cls_flower.key = &f->mkey;
253 cls_flower.exts = &f->exts;
254 cls_flower.classid = f->res.classid;
255
256 err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
257 &cls_flower, skip_sw);
258 if (err < 0) {
259 fl_hw_destroy_filter(tp, f, NULL);
260 return err;
261 } else if (err > 0) {
262 tcf_block_offload_inc(block, &f->flags);
263 }
264
265 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
266 return -EINVAL;
267
268 return 0;
269}
270
271static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
272{
273 struct tc_cls_flower_offload cls_flower = {};
274 struct tcf_block *block = tp->chain->block;
275
276 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
277 cls_flower.command = TC_CLSFLOWER_STATS;
278 cls_flower.cookie = (unsigned long) f;
279 cls_flower.exts = &f->exts;
280 cls_flower.classid = f->res.classid;
281
282 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
283 &cls_flower, false);
284}
285
286static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
287 struct netlink_ext_ack *extack)
288{
289 struct cls_fl_head *head = rtnl_dereference(tp->root);
290
291 idr_remove(&head->handle_idr, f->handle);
292 list_del_rcu(&f->list);
293 if (!tc_skip_hw(f->flags))
294 fl_hw_destroy_filter(tp, f, extack);
295 tcf_unbind_filter(tp, &f->res);
296 if (tcf_exts_get_net(&f->exts))
297 call_rcu(&f->rcu, fl_destroy_filter);
298 else
299 __fl_destroy_filter(f);
300}
301
302static void fl_destroy_sleepable(struct work_struct *work)
303{
304 struct cls_fl_head *head = container_of(work, struct cls_fl_head,
305 work);
306 if (head->mask_assigned)
307 rhashtable_destroy(&head->ht);
308 kfree(head);
309 module_put(THIS_MODULE);
310}
311
312static void fl_destroy_rcu(struct rcu_head *rcu)
313{
314 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
315
316 INIT_WORK(&head->work, fl_destroy_sleepable);
317 schedule_work(&head->work);
318}
319
320static void fl_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
321{
322 struct cls_fl_head *head = rtnl_dereference(tp->root);
323 struct cls_fl_filter *f, *next;
324
325 list_for_each_entry_safe(f, next, &head->filters, list)
326 __fl_delete(tp, f, extack);
327 idr_destroy(&head->handle_idr);
328
329 __module_get(THIS_MODULE);
330 call_rcu(&head->rcu, fl_destroy_rcu);
331}
332
333static void *fl_get(struct tcf_proto *tp, u32 handle)
334{
335 struct cls_fl_head *head = rtnl_dereference(tp->root);
336
337 return idr_find(&head->handle_idr, handle);
338}
339
340static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
341 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
342 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
343 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
344 .len = IFNAMSIZ },
345 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
346 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
347 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
348 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
349 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
350 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
351 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
352 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
353 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
354 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
355 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
356 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
357 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
358 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
359 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
360 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
361 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
362 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
363 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
364 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
365 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
366 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
367 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
368 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
369 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
370 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
371 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
372 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
373 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
374 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
375 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
376 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
377 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
378 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
379 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 },
380 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 },
381 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 },
382 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 },
383 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 },
384 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 },
385 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 },
386 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 },
387 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 },
388 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 },
389 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 },
390 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
391 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 },
392 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
393 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 },
394 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
395 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 },
396 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
397 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 },
398 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 },
399 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 },
400 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 },
401 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 },
402 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 },
403 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN },
404 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN },
405 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN },
406 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN },
407 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 },
408 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 },
409 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 },
410 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 },
411 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 },
412 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
413 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 },
414 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 },
415 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 },
416 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 },
417};
418
419static void fl_set_key_val(struct nlattr **tb,
420 void *val, int val_type,
421 void *mask, int mask_type, int len)
422{
423 if (!tb[val_type])
424 return;
425 memcpy(val, nla_data(tb[val_type]), len);
426 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
427 memset(mask, 0xff, len);
428 else
429 memcpy(mask, nla_data(tb[mask_type]), len);
430}
431
432static int fl_set_key_mpls(struct nlattr **tb,
433 struct flow_dissector_key_mpls *key_val,
434 struct flow_dissector_key_mpls *key_mask)
435{
436 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
437 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
438 key_mask->mpls_ttl = MPLS_TTL_MASK;
439 }
440 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
441 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
442
443 if (bos & ~MPLS_BOS_MASK)
444 return -EINVAL;
445 key_val->mpls_bos = bos;
446 key_mask->mpls_bos = MPLS_BOS_MASK;
447 }
448 if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
449 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
450
451 if (tc & ~MPLS_TC_MASK)
452 return -EINVAL;
453 key_val->mpls_tc = tc;
454 key_mask->mpls_tc = MPLS_TC_MASK;
455 }
456 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
457 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
458
459 if (label & ~MPLS_LABEL_MASK)
460 return -EINVAL;
461 key_val->mpls_label = label;
462 key_mask->mpls_label = MPLS_LABEL_MASK;
463 }
464 return 0;
465}
466
467static void fl_set_key_vlan(struct nlattr **tb,
468 struct flow_dissector_key_vlan *key_val,
469 struct flow_dissector_key_vlan *key_mask)
470{
471#define VLAN_PRIORITY_MASK 0x7
472
473 if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
474 key_val->vlan_id =
475 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
476 key_mask->vlan_id = VLAN_VID_MASK;
477 }
478 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
479 key_val->vlan_priority =
480 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
481 VLAN_PRIORITY_MASK;
482 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
483 }
484}
485
486static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
487 u32 *dissector_key, u32 *dissector_mask,
488 u32 flower_flag_bit, u32 dissector_flag_bit)
489{
490 if (flower_mask & flower_flag_bit) {
491 *dissector_mask |= dissector_flag_bit;
492 if (flower_key & flower_flag_bit)
493 *dissector_key |= dissector_flag_bit;
494 }
495}
496
497static int fl_set_key_flags(struct nlattr **tb,
498 u32 *flags_key, u32 *flags_mask)
499{
500 u32 key, mask;
501
502 /* mask is mandatory for flags */
503 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
504 return -EINVAL;
505
506 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
507 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
508
509 *flags_key = 0;
510 *flags_mask = 0;
511
512 fl_set_key_flag(key, mask, flags_key, flags_mask,
513 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
514 fl_set_key_flag(key, mask, flags_key, flags_mask,
515 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
516 FLOW_DIS_FIRST_FRAG);
517
518 return 0;
519}
520
521static void fl_set_key_ip(struct nlattr **tb,
522 struct flow_dissector_key_ip *key,
523 struct flow_dissector_key_ip *mask)
524{
525 fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS,
526 &mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK,
527 sizeof(key->tos));
528
529 fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL,
530 &mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK,
531 sizeof(key->ttl));
532}
533
534static int fl_set_key(struct net *net, struct nlattr **tb,
535 struct fl_flow_key *key, struct fl_flow_key *mask,
536 struct netlink_ext_ack *extack)
537{
538 __be16 ethertype;
539 int ret = 0;
540#ifdef CONFIG_NET_CLS_IND
541 if (tb[TCA_FLOWER_INDEV]) {
542 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
543 if (err < 0)
544 return err;
545 key->indev_ifindex = err;
546 mask->indev_ifindex = 0xffffffff;
547 }
548#endif
549
550 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
551 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
552 sizeof(key->eth.dst));
553 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
554 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
555 sizeof(key->eth.src));
556
557 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
558 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
559
560 if (ethertype == htons(ETH_P_8021Q)) {
561 fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
562 fl_set_key_val(tb, &key->basic.n_proto,
563 TCA_FLOWER_KEY_VLAN_ETH_TYPE,
564 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
565 sizeof(key->basic.n_proto));
566 } else {
567 key->basic.n_proto = ethertype;
568 mask->basic.n_proto = cpu_to_be16(~0);
569 }
570 }
571
572 if (key->basic.n_proto == htons(ETH_P_IP) ||
573 key->basic.n_proto == htons(ETH_P_IPV6)) {
574 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
575 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
576 sizeof(key->basic.ip_proto));
577 fl_set_key_ip(tb, &key->ip, &mask->ip);
578 }
579
580 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
581 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
582 mask->control.addr_type = ~0;
583 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
584 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
585 sizeof(key->ipv4.src));
586 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
587 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
588 sizeof(key->ipv4.dst));
589 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
590 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
591 mask->control.addr_type = ~0;
592 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
593 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
594 sizeof(key->ipv6.src));
595 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
596 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
597 sizeof(key->ipv6.dst));
598 }
599
600 if (key->basic.ip_proto == IPPROTO_TCP) {
601 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
602 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
603 sizeof(key->tp.src));
604 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
605 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
606 sizeof(key->tp.dst));
607 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
608 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
609 sizeof(key->tcp.flags));
610 } else if (key->basic.ip_proto == IPPROTO_UDP) {
611 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
612 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
613 sizeof(key->tp.src));
614 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
615 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
616 sizeof(key->tp.dst));
617 } else if (key->basic.ip_proto == IPPROTO_SCTP) {
618 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
619 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
620 sizeof(key->tp.src));
621 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
622 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
623 sizeof(key->tp.dst));
624 } else if (key->basic.n_proto == htons(ETH_P_IP) &&
625 key->basic.ip_proto == IPPROTO_ICMP) {
626 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
627 &mask->icmp.type,
628 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
629 sizeof(key->icmp.type));
630 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
631 &mask->icmp.code,
632 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
633 sizeof(key->icmp.code));
634 } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
635 key->basic.ip_proto == IPPROTO_ICMPV6) {
636 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
637 &mask->icmp.type,
638 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
639 sizeof(key->icmp.type));
640 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
641 &mask->icmp.code,
642 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
643 sizeof(key->icmp.code));
644 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
645 key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
646 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
647 if (ret)
648 return ret;
649 } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
650 key->basic.n_proto == htons(ETH_P_RARP)) {
651 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
652 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
653 sizeof(key->arp.sip));
654 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
655 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
656 sizeof(key->arp.tip));
657 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
658 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
659 sizeof(key->arp.op));
660 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
661 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
662 sizeof(key->arp.sha));
663 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
664 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
665 sizeof(key->arp.tha));
666 }
667
668 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
669 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
670 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
671 mask->enc_control.addr_type = ~0;
672 fl_set_key_val(tb, &key->enc_ipv4.src,
673 TCA_FLOWER_KEY_ENC_IPV4_SRC,
674 &mask->enc_ipv4.src,
675 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
676 sizeof(key->enc_ipv4.src));
677 fl_set_key_val(tb, &key->enc_ipv4.dst,
678 TCA_FLOWER_KEY_ENC_IPV4_DST,
679 &mask->enc_ipv4.dst,
680 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
681 sizeof(key->enc_ipv4.dst));
682 }
683
684 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
685 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
686 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
687 mask->enc_control.addr_type = ~0;
688 fl_set_key_val(tb, &key->enc_ipv6.src,
689 TCA_FLOWER_KEY_ENC_IPV6_SRC,
690 &mask->enc_ipv6.src,
691 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
692 sizeof(key->enc_ipv6.src));
693 fl_set_key_val(tb, &key->enc_ipv6.dst,
694 TCA_FLOWER_KEY_ENC_IPV6_DST,
695 &mask->enc_ipv6.dst,
696 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
697 sizeof(key->enc_ipv6.dst));
698 }
699
700 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
701 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
702 sizeof(key->enc_key_id.keyid));
703
704 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
705 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
706 sizeof(key->enc_tp.src));
707
708 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
709 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
710 sizeof(key->enc_tp.dst));
711
712 if (tb[TCA_FLOWER_KEY_FLAGS])
713 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
714
715 return ret;
716}
717
718static bool fl_mask_eq(struct fl_flow_mask *mask1,
719 struct fl_flow_mask *mask2)
720{
721 const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
722 const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
723
724 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
725 !memcmp(lmask1, lmask2, fl_mask_range(mask1));
726}
727
728static const struct rhashtable_params fl_ht_params = {
729 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
730 .head_offset = offsetof(struct cls_fl_filter, ht_node),
731 .automatic_shrinking = true,
732};
733
734static int fl_init_hashtable(struct cls_fl_head *head,
735 struct fl_flow_mask *mask)
736{
737 head->ht_params = fl_ht_params;
738 head->ht_params.key_len = fl_mask_range(mask);
739 head->ht_params.key_offset += mask->range.start;
740
741 return rhashtable_init(&head->ht, &head->ht_params);
742}
743
744#define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
745#define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
746
747#define FL_KEY_IS_MASKED(mask, member) \
748 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
749 0, FL_KEY_MEMBER_SIZE(member)) \
750
751#define FL_KEY_SET(keys, cnt, id, member) \
752 do { \
753 keys[cnt].key_id = id; \
754 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
755 cnt++; \
756 } while(0);
757
758#define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
759 do { \
760 if (FL_KEY_IS_MASKED(mask, member)) \
761 FL_KEY_SET(keys, cnt, id, member); \
762 } while(0);
763
764static void fl_init_dissector(struct cls_fl_head *head,
765 struct fl_flow_mask *mask)
766{
767 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
768 size_t cnt = 0;
769
770 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
771 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
772 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
773 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
774 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
775 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
776 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
777 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
778 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
779 FLOW_DISSECTOR_KEY_PORTS, tp);
780 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
781 FLOW_DISSECTOR_KEY_IP, ip);
782 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
783 FLOW_DISSECTOR_KEY_TCP, tcp);
784 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
785 FLOW_DISSECTOR_KEY_ICMP, icmp);
786 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
787 FLOW_DISSECTOR_KEY_ARP, arp);
788 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
789 FLOW_DISSECTOR_KEY_MPLS, mpls);
790 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
791 FLOW_DISSECTOR_KEY_VLAN, vlan);
792 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
793 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
794 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
795 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
796 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
797 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
798 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
799 FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
800 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
801 enc_control);
802 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
803 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
804
805 skb_flow_dissector_init(&head->dissector, keys, cnt);
806}
807
808static int fl_check_assign_mask(struct cls_fl_head *head,
809 struct fl_flow_mask *mask)
810{
811 int err;
812
813 if (head->mask_assigned) {
814 if (!fl_mask_eq(&head->mask, mask))
815 return -EINVAL;
816 else
817 return 0;
818 }
819
820 /* Mask is not assigned yet. So assign it and init hashtable
821 * according to that.
822 */
823 err = fl_init_hashtable(head, mask);
824 if (err)
825 return err;
826 memcpy(&head->mask, mask, sizeof(head->mask));
827 head->mask_assigned = true;
828
829 fl_init_dissector(head, mask);
830
831 return 0;
832}
833
834static int fl_set_parms(struct net *net, struct tcf_proto *tp,
835 struct cls_fl_filter *f, struct fl_flow_mask *mask,
836 unsigned long base, struct nlattr **tb,
837 struct nlattr *est, bool ovr,
838 struct netlink_ext_ack *extack)
839{
840 int err;
841
842 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack);
843 if (err < 0)
844 return err;
845
846 if (tb[TCA_FLOWER_CLASSID]) {
847 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
848 tcf_bind_filter(tp, &f->res, base);
849 }
850
851 err = fl_set_key(net, tb, &f->key, &mask->key, extack);
852 if (err)
853 return err;
854
855 fl_mask_update_range(mask);
856 fl_set_masked_key(&f->mkey, &f->key, mask);
857
858 return 0;
859}
860
861static int fl_change(struct net *net, struct sk_buff *in_skb,
862 struct tcf_proto *tp, unsigned long base,
863 u32 handle, struct nlattr **tca,
864 void **arg, bool ovr, struct netlink_ext_ack *extack)
865{
866 struct cls_fl_head *head = rtnl_dereference(tp->root);
867 struct cls_fl_filter *fold = *arg;
868 struct cls_fl_filter *fnew;
869 struct nlattr **tb;
870 struct fl_flow_mask mask = {};
871 int err;
872
873 if (!tca[TCA_OPTIONS])
874 return -EINVAL;
875
876 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
877 if (!tb)
878 return -ENOBUFS;
879
880 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
881 fl_policy, NULL);
882 if (err < 0)
883 goto errout_tb;
884
885 if (fold && handle && fold->handle != handle) {
886 err = -EINVAL;
887 goto errout_tb;
888 }
889
890 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
891 if (!fnew) {
892 err = -ENOBUFS;
893 goto errout_tb;
894 }
895
896 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
897 if (err < 0)
898 goto errout;
899
900 if (!handle) {
901 handle = 1;
902 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
903 INT_MAX, GFP_KERNEL);
904 } else if (!fold) {
905 /* user specifies a handle and it doesn't exist */
906 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
907 handle, GFP_KERNEL);
908 }
909 if (err)
910 goto errout;
911 fnew->handle = handle;
912
913 if (tb[TCA_FLOWER_FLAGS]) {
914 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
915
916 if (!tc_flags_valid(fnew->flags)) {
917 err = -EINVAL;
918 goto errout_idr;
919 }
920 }
921
922 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr,
923 extack);
924 if (err)
925 goto errout_idr;
926
927 err = fl_check_assign_mask(head, &mask);
928 if (err)
929 goto errout_idr;
930
931 if (!tc_skip_sw(fnew->flags)) {
932 if (!fold && fl_lookup(head, &fnew->mkey)) {
933 err = -EEXIST;
934 goto errout_idr;
935 }
936
937 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
938 head->ht_params);
939 if (err)
940 goto errout_idr;
941 }
942
943 if (!tc_skip_hw(fnew->flags)) {
944 err = fl_hw_replace_filter(tp,
945 &head->dissector,
946 &mask.key,
947 fnew,
948 extack);
949 if (err)
950 goto errout_idr;
951 }
952
953 if (!tc_in_hw(fnew->flags))
954 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
955
956 if (fold) {
957 if (!tc_skip_sw(fold->flags))
958 rhashtable_remove_fast(&head->ht, &fold->ht_node,
959 head->ht_params);
960 if (!tc_skip_hw(fold->flags))
961 fl_hw_destroy_filter(tp, fold, NULL);
962 }
963
964 *arg = fnew;
965
966 if (fold) {
967 idr_replace(&head->handle_idr, fnew, fnew->handle);
968 list_replace_rcu(&fold->list, &fnew->list);
969 tcf_unbind_filter(tp, &fold->res);
970 tcf_exts_get_net(&fold->exts);
971 call_rcu(&fold->rcu, fl_destroy_filter);
972 } else {
973 list_add_tail_rcu(&fnew->list, &head->filters);
974 }
975
976 kfree(tb);
977 return 0;
978
979errout_idr:
980 if (!fold)
981 idr_remove(&head->handle_idr, fnew->handle);
982errout:
983 tcf_exts_destroy(&fnew->exts);
984 kfree(fnew);
985errout_tb:
986 kfree(tb);
987 return err;
988}
989
990static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
991 struct netlink_ext_ack *extack)
992{
993 struct cls_fl_head *head = rtnl_dereference(tp->root);
994 struct cls_fl_filter *f = arg;
995
996 if (!tc_skip_sw(f->flags))
997 rhashtable_remove_fast(&head->ht, &f->ht_node,
998 head->ht_params);
999 __fl_delete(tp, f, extack);
1000 *last = list_empty(&head->filters);
1001 return 0;
1002}
1003
1004static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
1005{
1006 struct cls_fl_head *head = rtnl_dereference(tp->root);
1007 struct cls_fl_filter *f;
1008
1009 list_for_each_entry_rcu(f, &head->filters, list) {
1010 if (arg->count < arg->skip)
1011 goto skip;
1012 if (arg->fn(tp, f, arg) < 0) {
1013 arg->stop = 1;
1014 break;
1015 }
1016skip:
1017 arg->count++;
1018 }
1019}
1020
1021static int fl_dump_key_val(struct sk_buff *skb,
1022 void *val, int val_type,
1023 void *mask, int mask_type, int len)
1024{
1025 int err;
1026
1027 if (!memchr_inv(mask, 0, len))
1028 return 0;
1029 err = nla_put(skb, val_type, len, val);
1030 if (err)
1031 return err;
1032 if (mask_type != TCA_FLOWER_UNSPEC) {
1033 err = nla_put(skb, mask_type, len, mask);
1034 if (err)
1035 return err;
1036 }
1037 return 0;
1038}
1039
1040static int fl_dump_key_mpls(struct sk_buff *skb,
1041 struct flow_dissector_key_mpls *mpls_key,
1042 struct flow_dissector_key_mpls *mpls_mask)
1043{
1044 int err;
1045
1046 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
1047 return 0;
1048 if (mpls_mask->mpls_ttl) {
1049 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
1050 mpls_key->mpls_ttl);
1051 if (err)
1052 return err;
1053 }
1054 if (mpls_mask->mpls_tc) {
1055 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
1056 mpls_key->mpls_tc);
1057 if (err)
1058 return err;
1059 }
1060 if (mpls_mask->mpls_label) {
1061 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
1062 mpls_key->mpls_label);
1063 if (err)
1064 return err;
1065 }
1066 if (mpls_mask->mpls_bos) {
1067 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
1068 mpls_key->mpls_bos);
1069 if (err)
1070 return err;
1071 }
1072 return 0;
1073}
1074
1075static int fl_dump_key_ip(struct sk_buff *skb,
1076 struct flow_dissector_key_ip *key,
1077 struct flow_dissector_key_ip *mask)
1078{
1079 if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos,
1080 TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) ||
1081 fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl,
1082 TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl)))
1083 return -1;
1084
1085 return 0;
1086}
1087
1088static int fl_dump_key_vlan(struct sk_buff *skb,
1089 struct flow_dissector_key_vlan *vlan_key,
1090 struct flow_dissector_key_vlan *vlan_mask)
1091{
1092 int err;
1093
1094 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1095 return 0;
1096 if (vlan_mask->vlan_id) {
1097 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
1098 vlan_key->vlan_id);
1099 if (err)
1100 return err;
1101 }
1102 if (vlan_mask->vlan_priority) {
1103 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
1104 vlan_key->vlan_priority);
1105 if (err)
1106 return err;
1107 }
1108 return 0;
1109}
1110
1111static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1112 u32 *flower_key, u32 *flower_mask,
1113 u32 flower_flag_bit, u32 dissector_flag_bit)
1114{
1115 if (dissector_mask & dissector_flag_bit) {
1116 *flower_mask |= flower_flag_bit;
1117 if (dissector_key & dissector_flag_bit)
1118 *flower_key |= flower_flag_bit;
1119 }
1120}
1121
1122static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1123{
1124 u32 key, mask;
1125 __be32 _key, _mask;
1126 int err;
1127
1128 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1129 return 0;
1130
1131 key = 0;
1132 mask = 0;
1133
1134 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1135 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1136 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1137 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1138 FLOW_DIS_FIRST_FRAG);
1139
1140 _key = cpu_to_be32(key);
1141 _mask = cpu_to_be32(mask);
1142
1143 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1144 if (err)
1145 return err;
1146
1147 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1148}
1149
1150static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
1151 struct sk_buff *skb, struct tcmsg *t)
1152{
1153 struct cls_fl_head *head = rtnl_dereference(tp->root);
1154 struct cls_fl_filter *f = fh;
1155 struct nlattr *nest;
1156 struct fl_flow_key *key, *mask;
1157
1158 if (!f)
1159 return skb->len;
1160
1161 t->tcm_handle = f->handle;
1162
1163 nest = nla_nest_start(skb, TCA_OPTIONS);
1164 if (!nest)
1165 goto nla_put_failure;
1166
1167 if (f->res.classid &&
1168 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
1169 goto nla_put_failure;
1170
1171 key = &f->key;
1172 mask = &head->mask.key;
1173
1174 if (mask->indev_ifindex) {
1175 struct net_device *dev;
1176
1177 dev = __dev_get_by_index(net, key->indev_ifindex);
1178 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1179 goto nla_put_failure;
1180 }
1181
1182 if (!tc_skip_hw(f->flags))
1183 fl_hw_update_stats(tp, f);
1184
1185 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1186 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1187 sizeof(key->eth.dst)) ||
1188 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1189 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1190 sizeof(key->eth.src)) ||
1191 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1192 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1193 sizeof(key->basic.n_proto)))
1194 goto nla_put_failure;
1195
1196 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
1197 goto nla_put_failure;
1198
1199 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
1200 goto nla_put_failure;
1201
1202 if ((key->basic.n_proto == htons(ETH_P_IP) ||
1203 key->basic.n_proto == htons(ETH_P_IPV6)) &&
1204 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1205 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1206 sizeof(key->basic.ip_proto)) ||
1207 fl_dump_key_ip(skb, &key->ip, &mask->ip)))
1208 goto nla_put_failure;
1209
1210 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1211 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1212 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1213 sizeof(key->ipv4.src)) ||
1214 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1215 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1216 sizeof(key->ipv4.dst))))
1217 goto nla_put_failure;
1218 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1219 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1220 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1221 sizeof(key->ipv6.src)) ||
1222 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1223 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1224 sizeof(key->ipv6.dst))))
1225 goto nla_put_failure;
1226
1227 if (key->basic.ip_proto == IPPROTO_TCP &&
1228 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1229 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1230 sizeof(key->tp.src)) ||
1231 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1232 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1233 sizeof(key->tp.dst)) ||
1234 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1235 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1236 sizeof(key->tcp.flags))))
1237 goto nla_put_failure;
1238 else if (key->basic.ip_proto == IPPROTO_UDP &&
1239 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1240 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1241 sizeof(key->tp.src)) ||
1242 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1243 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1244 sizeof(key->tp.dst))))
1245 goto nla_put_failure;
1246 else if (key->basic.ip_proto == IPPROTO_SCTP &&
1247 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1248 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1249 sizeof(key->tp.src)) ||
1250 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1251 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1252 sizeof(key->tp.dst))))
1253 goto nla_put_failure;
1254 else if (key->basic.n_proto == htons(ETH_P_IP) &&
1255 key->basic.ip_proto == IPPROTO_ICMP &&
1256 (fl_dump_key_val(skb, &key->icmp.type,
1257 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1258 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1259 sizeof(key->icmp.type)) ||
1260 fl_dump_key_val(skb, &key->icmp.code,
1261 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1262 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1263 sizeof(key->icmp.code))))
1264 goto nla_put_failure;
1265 else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1266 key->basic.ip_proto == IPPROTO_ICMPV6 &&
1267 (fl_dump_key_val(skb, &key->icmp.type,
1268 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1269 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1270 sizeof(key->icmp.type)) ||
1271 fl_dump_key_val(skb, &key->icmp.code,
1272 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1273 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1274 sizeof(key->icmp.code))))
1275 goto nla_put_failure;
1276 else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1277 key->basic.n_proto == htons(ETH_P_RARP)) &&
1278 (fl_dump_key_val(skb, &key->arp.sip,
1279 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1280 TCA_FLOWER_KEY_ARP_SIP_MASK,
1281 sizeof(key->arp.sip)) ||
1282 fl_dump_key_val(skb, &key->arp.tip,
1283 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1284 TCA_FLOWER_KEY_ARP_TIP_MASK,
1285 sizeof(key->arp.tip)) ||
1286 fl_dump_key_val(skb, &key->arp.op,
1287 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1288 TCA_FLOWER_KEY_ARP_OP_MASK,
1289 sizeof(key->arp.op)) ||
1290 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1291 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1292 sizeof(key->arp.sha)) ||
1293 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1294 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1295 sizeof(key->arp.tha))))
1296 goto nla_put_failure;
1297
1298 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1299 (fl_dump_key_val(skb, &key->enc_ipv4.src,
1300 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1301 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1302 sizeof(key->enc_ipv4.src)) ||
1303 fl_dump_key_val(skb, &key->enc_ipv4.dst,
1304 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1305 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1306 sizeof(key->enc_ipv4.dst))))
1307 goto nla_put_failure;
1308 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1309 (fl_dump_key_val(skb, &key->enc_ipv6.src,
1310 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1311 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1312 sizeof(key->enc_ipv6.src)) ||
1313 fl_dump_key_val(skb, &key->enc_ipv6.dst,
1314 TCA_FLOWER_KEY_ENC_IPV6_DST,
1315 &mask->enc_ipv6.dst,
1316 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1317 sizeof(key->enc_ipv6.dst))))
1318 goto nla_put_failure;
1319
1320 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1321 &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1322 sizeof(key->enc_key_id)) ||
1323 fl_dump_key_val(skb, &key->enc_tp.src,
1324 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1325 &mask->enc_tp.src,
1326 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1327 sizeof(key->enc_tp.src)) ||
1328 fl_dump_key_val(skb, &key->enc_tp.dst,
1329 TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1330 &mask->enc_tp.dst,
1331 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1332 sizeof(key->enc_tp.dst)))
1333 goto nla_put_failure;
1334
1335 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1336 goto nla_put_failure;
1337
1338 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
1339 goto nla_put_failure;
1340
1341 if (tcf_exts_dump(skb, &f->exts))
1342 goto nla_put_failure;
1343
1344 nla_nest_end(skb, nest);
1345
1346 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
1347 goto nla_put_failure;
1348
1349 return skb->len;
1350
1351nla_put_failure:
1352 nla_nest_cancel(skb, nest);
1353 return -1;
1354}
1355
1356static void fl_bind_class(void *fh, u32 classid, unsigned long cl)
1357{
1358 struct cls_fl_filter *f = fh;
1359
1360 if (f && f->res.classid == classid)
1361 f->res.class = cl;
1362}
1363
1364static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1365 .kind = "flower",
1366 .classify = fl_classify,
1367 .init = fl_init,
1368 .destroy = fl_destroy,
1369 .get = fl_get,
1370 .change = fl_change,
1371 .delete = fl_delete,
1372 .walk = fl_walk,
1373 .dump = fl_dump,
1374 .bind_class = fl_bind_class,
1375 .owner = THIS_MODULE,
1376};
1377
1378static int __init cls_fl_init(void)
1379{
1380 return register_tcf_proto_ops(&cls_fl_ops);
1381}
1382
1383static void __exit cls_fl_exit(void)
1384{
1385 unregister_tcf_proto_ops(&cls_fl_ops);
1386}
1387
1388module_init(cls_fl_init);
1389module_exit(cls_fl_exit);
1390
1391MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
1392MODULE_DESCRIPTION("Flower classifier");
1393MODULE_LICENSE("GPL v2");