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pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM
[mirror_ubuntu-bionic-kernel.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 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
56 struct fl_flow_mask_range {
57 unsigned short int start;
58 unsigned short int end;
59 };
60
61 struct fl_flow_mask {
62 struct fl_flow_key key;
63 struct fl_flow_mask_range range;
64 struct rcu_head rcu;
65 };
66
67 struct 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 struct rcu_work rwork;
75 struct idr handle_idr;
76 };
77
78 struct cls_fl_filter {
79 struct rhash_head ht_node;
80 struct fl_flow_key mkey;
81 struct tcf_exts exts;
82 struct tcf_result res;
83 struct fl_flow_key key;
84 struct list_head list;
85 u32 handle;
86 u32 flags;
87 struct rcu_work rwork;
88 struct net_device *hw_dev;
89 };
90
91 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
92 {
93 return mask->range.end - mask->range.start;
94 }
95
96 static void fl_mask_update_range(struct fl_flow_mask *mask)
97 {
98 const u8 *bytes = (const u8 *) &mask->key;
99 size_t size = sizeof(mask->key);
100 size_t i, first = 0, last = size - 1;
101
102 for (i = 0; i < sizeof(mask->key); i++) {
103 if (bytes[i]) {
104 if (!first && i)
105 first = i;
106 last = i;
107 }
108 }
109 mask->range.start = rounddown(first, sizeof(long));
110 mask->range.end = roundup(last + 1, sizeof(long));
111 }
112
113 static void *fl_key_get_start(struct fl_flow_key *key,
114 const struct fl_flow_mask *mask)
115 {
116 return (u8 *) key + mask->range.start;
117 }
118
119 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
120 struct fl_flow_mask *mask)
121 {
122 const long *lkey = fl_key_get_start(key, mask);
123 const long *lmask = fl_key_get_start(&mask->key, mask);
124 long *lmkey = fl_key_get_start(mkey, mask);
125 int i;
126
127 for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
128 *lmkey++ = *lkey++ & *lmask++;
129 }
130
131 static void fl_clear_masked_range(struct fl_flow_key *key,
132 struct fl_flow_mask *mask)
133 {
134 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
135 }
136
137 static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head,
138 struct fl_flow_key *mkey)
139 {
140 return rhashtable_lookup_fast(&head->ht,
141 fl_key_get_start(mkey, &head->mask),
142 head->ht_params);
143 }
144
145 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
146 struct tcf_result *res)
147 {
148 struct cls_fl_head *head = rcu_dereference_bh(tp->root);
149 struct cls_fl_filter *f;
150 struct fl_flow_key skb_key;
151 struct fl_flow_key skb_mkey;
152
153 if (!atomic_read(&head->ht.nelems))
154 return -1;
155
156 fl_clear_masked_range(&skb_key, &head->mask);
157
158 skb_key.indev_ifindex = skb->skb_iif;
159 /* skb_flow_dissect() does not set n_proto in case an unknown protocol,
160 * so do it rather here.
161 */
162 skb_key.basic.n_proto = skb->protocol;
163 skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
164
165 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
166
167 f = fl_lookup(head, &skb_mkey);
168 if (f && !tc_skip_sw(f->flags)) {
169 *res = f->res;
170 return tcf_exts_exec(skb, &f->exts, res);
171 }
172 return -1;
173 }
174
175 static int fl_init(struct tcf_proto *tp)
176 {
177 struct cls_fl_head *head;
178
179 head = kzalloc(sizeof(*head), GFP_KERNEL);
180 if (!head)
181 return -ENOBUFS;
182
183 INIT_LIST_HEAD_RCU(&head->filters);
184 rcu_assign_pointer(tp->root, head);
185 idr_init(&head->handle_idr);
186
187 return 0;
188 }
189
190 static void __fl_destroy_filter(struct cls_fl_filter *f)
191 {
192 tcf_exts_destroy(&f->exts);
193 tcf_exts_put_net(&f->exts);
194 kfree(f);
195 }
196
197 static void fl_destroy_filter_work(struct work_struct *work)
198 {
199 struct cls_fl_filter *f = container_of(to_rcu_work(work),
200 struct cls_fl_filter, rwork);
201
202 rtnl_lock();
203 __fl_destroy_filter(f);
204 rtnl_unlock();
205 }
206
207 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f)
208 {
209 struct tc_cls_flower_offload cls_flower = {};
210 struct tcf_block *block = tp->chain->block;
211
212 tc_cls_common_offload_init(&cls_flower.common, tp);
213 cls_flower.command = TC_CLSFLOWER_DESTROY;
214 cls_flower.cookie = (unsigned long) f;
215
216 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
217 &cls_flower, false);
218 }
219
220 static int fl_hw_replace_filter(struct tcf_proto *tp,
221 struct flow_dissector *dissector,
222 struct fl_flow_key *mask,
223 struct cls_fl_filter *f)
224 {
225 struct tc_cls_flower_offload cls_flower = {};
226 struct tcf_block *block = tp->chain->block;
227 bool skip_sw = tc_skip_sw(f->flags);
228 int err;
229
230 tc_cls_common_offload_init(&cls_flower.common, tp);
231 cls_flower.command = TC_CLSFLOWER_REPLACE;
232 cls_flower.cookie = (unsigned long) f;
233 cls_flower.dissector = dissector;
234 cls_flower.mask = mask;
235 cls_flower.key = &f->mkey;
236 cls_flower.exts = &f->exts;
237 cls_flower.classid = f->res.classid;
238
239 err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
240 &cls_flower, skip_sw);
241 if (err < 0) {
242 fl_hw_destroy_filter(tp, f);
243 return err;
244 } else if (err > 0) {
245 f->flags |= TCA_CLS_FLAGS_IN_HW;
246 }
247
248 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
249 return -EINVAL;
250
251 return 0;
252 }
253
254 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
255 {
256 struct tc_cls_flower_offload cls_flower = {};
257 struct tcf_block *block = tp->chain->block;
258
259 tc_cls_common_offload_init(&cls_flower.common, tp);
260 cls_flower.command = TC_CLSFLOWER_STATS;
261 cls_flower.cookie = (unsigned long) f;
262 cls_flower.exts = &f->exts;
263 cls_flower.classid = f->res.classid;
264
265 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
266 &cls_flower, false);
267 }
268
269 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
270 {
271 struct cls_fl_head *head = rtnl_dereference(tp->root);
272
273 idr_remove_ext(&head->handle_idr, f->handle);
274 list_del_rcu(&f->list);
275 if (!tc_skip_hw(f->flags))
276 fl_hw_destroy_filter(tp, f);
277 tcf_unbind_filter(tp, &f->res);
278 if (tcf_exts_get_net(&f->exts))
279 tcf_queue_work(&f->rwork, fl_destroy_filter_work);
280 else
281 __fl_destroy_filter(f);
282 }
283
284 static void fl_destroy_sleepable(struct work_struct *work)
285 {
286 struct cls_fl_head *head = container_of(to_rcu_work(work),
287 struct cls_fl_head,
288 rwork);
289 if (head->mask_assigned)
290 rhashtable_destroy(&head->ht);
291 kfree(head);
292 module_put(THIS_MODULE);
293 }
294
295 static void fl_destroy(struct tcf_proto *tp)
296 {
297 struct cls_fl_head *head = rtnl_dereference(tp->root);
298 struct cls_fl_filter *f, *next;
299
300 list_for_each_entry_safe(f, next, &head->filters, list)
301 __fl_delete(tp, f);
302 idr_destroy(&head->handle_idr);
303
304 __module_get(THIS_MODULE);
305 tcf_queue_work(&head->rwork, fl_destroy_sleepable);
306 }
307
308 static void *fl_get(struct tcf_proto *tp, u32 handle)
309 {
310 struct cls_fl_head *head = rtnl_dereference(tp->root);
311
312 return idr_find_ext(&head->handle_idr, handle);
313 }
314
315 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
316 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
317 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
318 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
319 .len = IFNAMSIZ },
320 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
321 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
322 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
323 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
324 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
325 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
326 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
327 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
328 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
329 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
330 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
331 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
332 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
333 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
334 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
335 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
336 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
337 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
338 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
339 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
340 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
341 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
342 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
343 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
344 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
345 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
346 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
347 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
348 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
349 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
350 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
351 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
352 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
353 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
354 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 },
355 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 },
356 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 },
357 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 },
358 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 },
359 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 },
360 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 },
361 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 },
362 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 },
363 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 },
364 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 },
365 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
366 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 },
367 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
368 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 },
369 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
370 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 },
371 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
372 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 },
373 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 },
374 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 },
375 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 },
376 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 },
377 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 },
378 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN },
379 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN },
380 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN },
381 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN },
382 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 },
383 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 },
384 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 },
385 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 },
386 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 },
387 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
388 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 },
389 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 },
390 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 },
391 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 },
392 };
393
394 static void fl_set_key_val(struct nlattr **tb,
395 void *val, int val_type,
396 void *mask, int mask_type, int len)
397 {
398 if (!tb[val_type])
399 return;
400 memcpy(val, nla_data(tb[val_type]), len);
401 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
402 memset(mask, 0xff, len);
403 else
404 memcpy(mask, nla_data(tb[mask_type]), len);
405 }
406
407 static int fl_set_key_mpls(struct nlattr **tb,
408 struct flow_dissector_key_mpls *key_val,
409 struct flow_dissector_key_mpls *key_mask)
410 {
411 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
412 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
413 key_mask->mpls_ttl = MPLS_TTL_MASK;
414 }
415 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
416 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
417
418 if (bos & ~MPLS_BOS_MASK)
419 return -EINVAL;
420 key_val->mpls_bos = bos;
421 key_mask->mpls_bos = MPLS_BOS_MASK;
422 }
423 if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
424 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
425
426 if (tc & ~MPLS_TC_MASK)
427 return -EINVAL;
428 key_val->mpls_tc = tc;
429 key_mask->mpls_tc = MPLS_TC_MASK;
430 }
431 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
432 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
433
434 if (label & ~MPLS_LABEL_MASK)
435 return -EINVAL;
436 key_val->mpls_label = label;
437 key_mask->mpls_label = MPLS_LABEL_MASK;
438 }
439 return 0;
440 }
441
442 static void fl_set_key_vlan(struct nlattr **tb,
443 struct flow_dissector_key_vlan *key_val,
444 struct flow_dissector_key_vlan *key_mask)
445 {
446 #define VLAN_PRIORITY_MASK 0x7
447
448 if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
449 key_val->vlan_id =
450 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
451 key_mask->vlan_id = VLAN_VID_MASK;
452 }
453 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
454 key_val->vlan_priority =
455 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
456 VLAN_PRIORITY_MASK;
457 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
458 }
459 }
460
461 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
462 u32 *dissector_key, u32 *dissector_mask,
463 u32 flower_flag_bit, u32 dissector_flag_bit)
464 {
465 if (flower_mask & flower_flag_bit) {
466 *dissector_mask |= dissector_flag_bit;
467 if (flower_key & flower_flag_bit)
468 *dissector_key |= dissector_flag_bit;
469 }
470 }
471
472 static int fl_set_key_flags(struct nlattr **tb,
473 u32 *flags_key, u32 *flags_mask)
474 {
475 u32 key, mask;
476
477 /* mask is mandatory for flags */
478 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
479 return -EINVAL;
480
481 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
482 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
483
484 *flags_key = 0;
485 *flags_mask = 0;
486
487 fl_set_key_flag(key, mask, flags_key, flags_mask,
488 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
489
490 return 0;
491 }
492
493 static void fl_set_key_ip(struct nlattr **tb,
494 struct flow_dissector_key_ip *key,
495 struct flow_dissector_key_ip *mask)
496 {
497 fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS,
498 &mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK,
499 sizeof(key->tos));
500
501 fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL,
502 &mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK,
503 sizeof(key->ttl));
504 }
505
506 static int fl_set_key(struct net *net, struct nlattr **tb,
507 struct fl_flow_key *key, struct fl_flow_key *mask)
508 {
509 __be16 ethertype;
510 int ret = 0;
511 #ifdef CONFIG_NET_CLS_IND
512 if (tb[TCA_FLOWER_INDEV]) {
513 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
514 if (err < 0)
515 return err;
516 key->indev_ifindex = err;
517 mask->indev_ifindex = 0xffffffff;
518 }
519 #endif
520
521 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
522 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
523 sizeof(key->eth.dst));
524 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
525 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
526 sizeof(key->eth.src));
527
528 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
529 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
530
531 if (ethertype == htons(ETH_P_8021Q)) {
532 fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
533 fl_set_key_val(tb, &key->basic.n_proto,
534 TCA_FLOWER_KEY_VLAN_ETH_TYPE,
535 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
536 sizeof(key->basic.n_proto));
537 } else {
538 key->basic.n_proto = ethertype;
539 mask->basic.n_proto = cpu_to_be16(~0);
540 }
541 }
542
543 if (key->basic.n_proto == htons(ETH_P_IP) ||
544 key->basic.n_proto == htons(ETH_P_IPV6)) {
545 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
546 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
547 sizeof(key->basic.ip_proto));
548 fl_set_key_ip(tb, &key->ip, &mask->ip);
549 }
550
551 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
552 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
553 mask->control.addr_type = ~0;
554 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
555 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
556 sizeof(key->ipv4.src));
557 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
558 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
559 sizeof(key->ipv4.dst));
560 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
561 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
562 mask->control.addr_type = ~0;
563 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
564 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
565 sizeof(key->ipv6.src));
566 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
567 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
568 sizeof(key->ipv6.dst));
569 }
570
571 if (key->basic.ip_proto == IPPROTO_TCP) {
572 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
573 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
574 sizeof(key->tp.src));
575 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
576 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
577 sizeof(key->tp.dst));
578 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
579 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
580 sizeof(key->tcp.flags));
581 } else if (key->basic.ip_proto == IPPROTO_UDP) {
582 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
583 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
584 sizeof(key->tp.src));
585 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
586 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
587 sizeof(key->tp.dst));
588 } else if (key->basic.ip_proto == IPPROTO_SCTP) {
589 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
590 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
591 sizeof(key->tp.src));
592 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
593 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
594 sizeof(key->tp.dst));
595 } else if (key->basic.n_proto == htons(ETH_P_IP) &&
596 key->basic.ip_proto == IPPROTO_ICMP) {
597 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
598 &mask->icmp.type,
599 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
600 sizeof(key->icmp.type));
601 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
602 &mask->icmp.code,
603 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
604 sizeof(key->icmp.code));
605 } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
606 key->basic.ip_proto == IPPROTO_ICMPV6) {
607 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
608 &mask->icmp.type,
609 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
610 sizeof(key->icmp.type));
611 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
612 &mask->icmp.code,
613 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
614 sizeof(key->icmp.code));
615 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
616 key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
617 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
618 if (ret)
619 return ret;
620 } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
621 key->basic.n_proto == htons(ETH_P_RARP)) {
622 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
623 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
624 sizeof(key->arp.sip));
625 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
626 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
627 sizeof(key->arp.tip));
628 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
629 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
630 sizeof(key->arp.op));
631 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
632 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
633 sizeof(key->arp.sha));
634 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
635 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
636 sizeof(key->arp.tha));
637 }
638
639 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
640 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
641 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
642 mask->enc_control.addr_type = ~0;
643 fl_set_key_val(tb, &key->enc_ipv4.src,
644 TCA_FLOWER_KEY_ENC_IPV4_SRC,
645 &mask->enc_ipv4.src,
646 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
647 sizeof(key->enc_ipv4.src));
648 fl_set_key_val(tb, &key->enc_ipv4.dst,
649 TCA_FLOWER_KEY_ENC_IPV4_DST,
650 &mask->enc_ipv4.dst,
651 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
652 sizeof(key->enc_ipv4.dst));
653 }
654
655 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
656 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
657 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
658 mask->enc_control.addr_type = ~0;
659 fl_set_key_val(tb, &key->enc_ipv6.src,
660 TCA_FLOWER_KEY_ENC_IPV6_SRC,
661 &mask->enc_ipv6.src,
662 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
663 sizeof(key->enc_ipv6.src));
664 fl_set_key_val(tb, &key->enc_ipv6.dst,
665 TCA_FLOWER_KEY_ENC_IPV6_DST,
666 &mask->enc_ipv6.dst,
667 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
668 sizeof(key->enc_ipv6.dst));
669 }
670
671 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
672 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
673 sizeof(key->enc_key_id.keyid));
674
675 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
676 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
677 sizeof(key->enc_tp.src));
678
679 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
680 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
681 sizeof(key->enc_tp.dst));
682
683 if (tb[TCA_FLOWER_KEY_FLAGS])
684 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
685
686 return ret;
687 }
688
689 static bool fl_mask_eq(struct fl_flow_mask *mask1,
690 struct fl_flow_mask *mask2)
691 {
692 const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
693 const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
694
695 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
696 !memcmp(lmask1, lmask2, fl_mask_range(mask1));
697 }
698
699 static const struct rhashtable_params fl_ht_params = {
700 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
701 .head_offset = offsetof(struct cls_fl_filter, ht_node),
702 .automatic_shrinking = true,
703 };
704
705 static int fl_init_hashtable(struct cls_fl_head *head,
706 struct fl_flow_mask *mask)
707 {
708 head->ht_params = fl_ht_params;
709 head->ht_params.key_len = fl_mask_range(mask);
710 head->ht_params.key_offset += mask->range.start;
711
712 return rhashtable_init(&head->ht, &head->ht_params);
713 }
714
715 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
716 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
717
718 #define FL_KEY_IS_MASKED(mask, member) \
719 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
720 0, FL_KEY_MEMBER_SIZE(member)) \
721
722 #define FL_KEY_SET(keys, cnt, id, member) \
723 do { \
724 keys[cnt].key_id = id; \
725 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
726 cnt++; \
727 } while(0);
728
729 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
730 do { \
731 if (FL_KEY_IS_MASKED(mask, member)) \
732 FL_KEY_SET(keys, cnt, id, member); \
733 } while(0);
734
735 static void fl_init_dissector(struct cls_fl_head *head,
736 struct fl_flow_mask *mask)
737 {
738 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
739 size_t cnt = 0;
740
741 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
742 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
743 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
744 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
745 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
746 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
747 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
748 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
749 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
750 FLOW_DISSECTOR_KEY_PORTS, tp);
751 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
752 FLOW_DISSECTOR_KEY_IP, ip);
753 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
754 FLOW_DISSECTOR_KEY_TCP, tcp);
755 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
756 FLOW_DISSECTOR_KEY_ICMP, icmp);
757 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
758 FLOW_DISSECTOR_KEY_ARP, arp);
759 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
760 FLOW_DISSECTOR_KEY_MPLS, mpls);
761 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
762 FLOW_DISSECTOR_KEY_VLAN, vlan);
763 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
764 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
765 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
766 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
767 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
768 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
769 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
770 FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
771 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
772 enc_control);
773 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
774 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
775
776 skb_flow_dissector_init(&head->dissector, keys, cnt);
777 }
778
779 static int fl_check_assign_mask(struct cls_fl_head *head,
780 struct fl_flow_mask *mask)
781 {
782 int err;
783
784 if (head->mask_assigned) {
785 if (!fl_mask_eq(&head->mask, mask))
786 return -EINVAL;
787 else
788 return 0;
789 }
790
791 /* Mask is not assigned yet. So assign it and init hashtable
792 * according to that.
793 */
794 err = fl_init_hashtable(head, mask);
795 if (err)
796 return err;
797 memcpy(&head->mask, mask, sizeof(head->mask));
798 head->mask_assigned = true;
799
800 fl_init_dissector(head, mask);
801
802 return 0;
803 }
804
805 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
806 struct cls_fl_filter *f, struct fl_flow_mask *mask,
807 unsigned long base, struct nlattr **tb,
808 struct nlattr *est, bool ovr)
809 {
810 int err;
811
812 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr);
813 if (err < 0)
814 return err;
815
816 if (tb[TCA_FLOWER_CLASSID]) {
817 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
818 tcf_bind_filter(tp, &f->res, base);
819 }
820
821 err = fl_set_key(net, tb, &f->key, &mask->key);
822 if (err)
823 return err;
824
825 fl_mask_update_range(mask);
826 fl_set_masked_key(&f->mkey, &f->key, mask);
827
828 return 0;
829 }
830
831 static int fl_change(struct net *net, struct sk_buff *in_skb,
832 struct tcf_proto *tp, unsigned long base,
833 u32 handle, struct nlattr **tca,
834 void **arg, bool ovr)
835 {
836 struct cls_fl_head *head = rtnl_dereference(tp->root);
837 struct cls_fl_filter *fold = *arg;
838 struct cls_fl_filter *fnew;
839 struct nlattr **tb;
840 struct fl_flow_mask mask = {};
841 unsigned long idr_index;
842 int err;
843
844 if (!tca[TCA_OPTIONS])
845 return -EINVAL;
846
847 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
848 if (!tb)
849 return -ENOBUFS;
850
851 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
852 fl_policy, NULL);
853 if (err < 0)
854 goto errout_tb;
855
856 if (fold && handle && fold->handle != handle) {
857 err = -EINVAL;
858 goto errout_tb;
859 }
860
861 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
862 if (!fnew) {
863 err = -ENOBUFS;
864 goto errout_tb;
865 }
866
867 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0);
868 if (err < 0)
869 goto errout;
870
871 if (!handle) {
872 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index,
873 1, 0x80000000, GFP_KERNEL);
874 if (err)
875 goto errout;
876 fnew->handle = idr_index;
877 }
878
879 /* user specifies a handle and it doesn't exist */
880 if (handle && !fold) {
881 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index,
882 handle, handle + 1, GFP_KERNEL);
883 if (err)
884 goto errout;
885 fnew->handle = idr_index;
886 }
887
888 if (tb[TCA_FLOWER_FLAGS]) {
889 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
890
891 if (!tc_flags_valid(fnew->flags)) {
892 err = -EINVAL;
893 goto errout_idr;
894 }
895 }
896
897 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
898 if (err)
899 goto errout_idr;
900
901 err = fl_check_assign_mask(head, &mask);
902 if (err)
903 goto errout_idr;
904
905 if (!tc_skip_sw(fnew->flags)) {
906 if (!fold && fl_lookup(head, &fnew->mkey)) {
907 err = -EEXIST;
908 goto errout_idr;
909 }
910
911 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
912 head->ht_params);
913 if (err)
914 goto errout_idr;
915 }
916
917 if (!tc_skip_hw(fnew->flags)) {
918 err = fl_hw_replace_filter(tp,
919 &head->dissector,
920 &mask.key,
921 fnew);
922 if (err)
923 goto errout_idr;
924 }
925
926 if (!tc_in_hw(fnew->flags))
927 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
928
929 if (fold) {
930 if (!tc_skip_sw(fold->flags))
931 rhashtable_remove_fast(&head->ht, &fold->ht_node,
932 head->ht_params);
933 if (!tc_skip_hw(fold->flags))
934 fl_hw_destroy_filter(tp, fold);
935 }
936
937 *arg = fnew;
938
939 if (fold) {
940 fnew->handle = handle;
941 idr_replace_ext(&head->handle_idr, fnew, fnew->handle);
942 list_replace_rcu(&fold->list, &fnew->list);
943 tcf_unbind_filter(tp, &fold->res);
944 tcf_exts_get_net(&fold->exts);
945 tcf_queue_work(&fold->rwork, fl_destroy_filter_work);
946 } else {
947 list_add_tail_rcu(&fnew->list, &head->filters);
948 }
949
950 kfree(tb);
951 return 0;
952
953 errout_idr:
954 if (!fold)
955 idr_remove_ext(&head->handle_idr, fnew->handle);
956 errout:
957 tcf_exts_destroy(&fnew->exts);
958 kfree(fnew);
959 errout_tb:
960 kfree(tb);
961 return err;
962 }
963
964 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last)
965 {
966 struct cls_fl_head *head = rtnl_dereference(tp->root);
967 struct cls_fl_filter *f = arg;
968
969 if (!tc_skip_sw(f->flags))
970 rhashtable_remove_fast(&head->ht, &f->ht_node,
971 head->ht_params);
972 __fl_delete(tp, f);
973 *last = list_empty(&head->filters);
974 return 0;
975 }
976
977 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
978 {
979 struct cls_fl_head *head = rtnl_dereference(tp->root);
980 struct cls_fl_filter *f;
981
982 list_for_each_entry_rcu(f, &head->filters, list) {
983 if (arg->count < arg->skip)
984 goto skip;
985 if (arg->fn(tp, f, arg) < 0) {
986 arg->stop = 1;
987 break;
988 }
989 skip:
990 arg->count++;
991 }
992 }
993
994 static int fl_dump_key_val(struct sk_buff *skb,
995 void *val, int val_type,
996 void *mask, int mask_type, int len)
997 {
998 int err;
999
1000 if (!memchr_inv(mask, 0, len))
1001 return 0;
1002 err = nla_put(skb, val_type, len, val);
1003 if (err)
1004 return err;
1005 if (mask_type != TCA_FLOWER_UNSPEC) {
1006 err = nla_put(skb, mask_type, len, mask);
1007 if (err)
1008 return err;
1009 }
1010 return 0;
1011 }
1012
1013 static int fl_dump_key_mpls(struct sk_buff *skb,
1014 struct flow_dissector_key_mpls *mpls_key,
1015 struct flow_dissector_key_mpls *mpls_mask)
1016 {
1017 int err;
1018
1019 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
1020 return 0;
1021 if (mpls_mask->mpls_ttl) {
1022 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
1023 mpls_key->mpls_ttl);
1024 if (err)
1025 return err;
1026 }
1027 if (mpls_mask->mpls_tc) {
1028 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
1029 mpls_key->mpls_tc);
1030 if (err)
1031 return err;
1032 }
1033 if (mpls_mask->mpls_label) {
1034 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
1035 mpls_key->mpls_label);
1036 if (err)
1037 return err;
1038 }
1039 if (mpls_mask->mpls_bos) {
1040 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
1041 mpls_key->mpls_bos);
1042 if (err)
1043 return err;
1044 }
1045 return 0;
1046 }
1047
1048 static int fl_dump_key_ip(struct sk_buff *skb,
1049 struct flow_dissector_key_ip *key,
1050 struct flow_dissector_key_ip *mask)
1051 {
1052 if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos,
1053 TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) ||
1054 fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl,
1055 TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl)))
1056 return -1;
1057
1058 return 0;
1059 }
1060
1061 static int fl_dump_key_vlan(struct sk_buff *skb,
1062 struct flow_dissector_key_vlan *vlan_key,
1063 struct flow_dissector_key_vlan *vlan_mask)
1064 {
1065 int err;
1066
1067 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1068 return 0;
1069 if (vlan_mask->vlan_id) {
1070 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
1071 vlan_key->vlan_id);
1072 if (err)
1073 return err;
1074 }
1075 if (vlan_mask->vlan_priority) {
1076 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
1077 vlan_key->vlan_priority);
1078 if (err)
1079 return err;
1080 }
1081 return 0;
1082 }
1083
1084 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1085 u32 *flower_key, u32 *flower_mask,
1086 u32 flower_flag_bit, u32 dissector_flag_bit)
1087 {
1088 if (dissector_mask & dissector_flag_bit) {
1089 *flower_mask |= flower_flag_bit;
1090 if (dissector_key & dissector_flag_bit)
1091 *flower_key |= flower_flag_bit;
1092 }
1093 }
1094
1095 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1096 {
1097 u32 key, mask;
1098 __be32 _key, _mask;
1099 int err;
1100
1101 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1102 return 0;
1103
1104 key = 0;
1105 mask = 0;
1106
1107 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1108 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1109
1110 _key = cpu_to_be32(key);
1111 _mask = cpu_to_be32(mask);
1112
1113 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1114 if (err)
1115 return err;
1116
1117 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1118 }
1119
1120 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
1121 struct sk_buff *skb, struct tcmsg *t)
1122 {
1123 struct cls_fl_head *head = rtnl_dereference(tp->root);
1124 struct cls_fl_filter *f = fh;
1125 struct nlattr *nest;
1126 struct fl_flow_key *key, *mask;
1127
1128 if (!f)
1129 return skb->len;
1130
1131 t->tcm_handle = f->handle;
1132
1133 nest = nla_nest_start(skb, TCA_OPTIONS);
1134 if (!nest)
1135 goto nla_put_failure;
1136
1137 if (f->res.classid &&
1138 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
1139 goto nla_put_failure;
1140
1141 key = &f->key;
1142 mask = &head->mask.key;
1143
1144 if (mask->indev_ifindex) {
1145 struct net_device *dev;
1146
1147 dev = __dev_get_by_index(net, key->indev_ifindex);
1148 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1149 goto nla_put_failure;
1150 }
1151
1152 if (!tc_skip_hw(f->flags))
1153 fl_hw_update_stats(tp, f);
1154
1155 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1156 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1157 sizeof(key->eth.dst)) ||
1158 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1159 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1160 sizeof(key->eth.src)) ||
1161 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1162 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1163 sizeof(key->basic.n_proto)))
1164 goto nla_put_failure;
1165
1166 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
1167 goto nla_put_failure;
1168
1169 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
1170 goto nla_put_failure;
1171
1172 if ((key->basic.n_proto == htons(ETH_P_IP) ||
1173 key->basic.n_proto == htons(ETH_P_IPV6)) &&
1174 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1175 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1176 sizeof(key->basic.ip_proto)) ||
1177 fl_dump_key_ip(skb, &key->ip, &mask->ip)))
1178 goto nla_put_failure;
1179
1180 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1181 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1182 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1183 sizeof(key->ipv4.src)) ||
1184 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1185 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1186 sizeof(key->ipv4.dst))))
1187 goto nla_put_failure;
1188 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1189 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1190 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1191 sizeof(key->ipv6.src)) ||
1192 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1193 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1194 sizeof(key->ipv6.dst))))
1195 goto nla_put_failure;
1196
1197 if (key->basic.ip_proto == IPPROTO_TCP &&
1198 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1199 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1200 sizeof(key->tp.src)) ||
1201 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1202 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1203 sizeof(key->tp.dst)) ||
1204 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1205 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1206 sizeof(key->tcp.flags))))
1207 goto nla_put_failure;
1208 else if (key->basic.ip_proto == IPPROTO_UDP &&
1209 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1210 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1211 sizeof(key->tp.src)) ||
1212 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1213 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1214 sizeof(key->tp.dst))))
1215 goto nla_put_failure;
1216 else if (key->basic.ip_proto == IPPROTO_SCTP &&
1217 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1218 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1219 sizeof(key->tp.src)) ||
1220 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1221 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1222 sizeof(key->tp.dst))))
1223 goto nla_put_failure;
1224 else if (key->basic.n_proto == htons(ETH_P_IP) &&
1225 key->basic.ip_proto == IPPROTO_ICMP &&
1226 (fl_dump_key_val(skb, &key->icmp.type,
1227 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1228 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1229 sizeof(key->icmp.type)) ||
1230 fl_dump_key_val(skb, &key->icmp.code,
1231 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1232 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1233 sizeof(key->icmp.code))))
1234 goto nla_put_failure;
1235 else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1236 key->basic.ip_proto == IPPROTO_ICMPV6 &&
1237 (fl_dump_key_val(skb, &key->icmp.type,
1238 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1239 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1240 sizeof(key->icmp.type)) ||
1241 fl_dump_key_val(skb, &key->icmp.code,
1242 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1243 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1244 sizeof(key->icmp.code))))
1245 goto nla_put_failure;
1246 else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1247 key->basic.n_proto == htons(ETH_P_RARP)) &&
1248 (fl_dump_key_val(skb, &key->arp.sip,
1249 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1250 TCA_FLOWER_KEY_ARP_SIP_MASK,
1251 sizeof(key->arp.sip)) ||
1252 fl_dump_key_val(skb, &key->arp.tip,
1253 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1254 TCA_FLOWER_KEY_ARP_TIP_MASK,
1255 sizeof(key->arp.tip)) ||
1256 fl_dump_key_val(skb, &key->arp.op,
1257 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1258 TCA_FLOWER_KEY_ARP_OP_MASK,
1259 sizeof(key->arp.op)) ||
1260 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1261 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1262 sizeof(key->arp.sha)) ||
1263 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1264 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1265 sizeof(key->arp.tha))))
1266 goto nla_put_failure;
1267
1268 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1269 (fl_dump_key_val(skb, &key->enc_ipv4.src,
1270 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1271 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1272 sizeof(key->enc_ipv4.src)) ||
1273 fl_dump_key_val(skb, &key->enc_ipv4.dst,
1274 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1275 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1276 sizeof(key->enc_ipv4.dst))))
1277 goto nla_put_failure;
1278 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1279 (fl_dump_key_val(skb, &key->enc_ipv6.src,
1280 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1281 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1282 sizeof(key->enc_ipv6.src)) ||
1283 fl_dump_key_val(skb, &key->enc_ipv6.dst,
1284 TCA_FLOWER_KEY_ENC_IPV6_DST,
1285 &mask->enc_ipv6.dst,
1286 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1287 sizeof(key->enc_ipv6.dst))))
1288 goto nla_put_failure;
1289
1290 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1291 &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1292 sizeof(key->enc_key_id)) ||
1293 fl_dump_key_val(skb, &key->enc_tp.src,
1294 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1295 &mask->enc_tp.src,
1296 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1297 sizeof(key->enc_tp.src)) ||
1298 fl_dump_key_val(skb, &key->enc_tp.dst,
1299 TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1300 &mask->enc_tp.dst,
1301 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1302 sizeof(key->enc_tp.dst)))
1303 goto nla_put_failure;
1304
1305 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1306 goto nla_put_failure;
1307
1308 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
1309 goto nla_put_failure;
1310
1311 if (tcf_exts_dump(skb, &f->exts))
1312 goto nla_put_failure;
1313
1314 nla_nest_end(skb, nest);
1315
1316 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
1317 goto nla_put_failure;
1318
1319 return skb->len;
1320
1321 nla_put_failure:
1322 nla_nest_cancel(skb, nest);
1323 return -1;
1324 }
1325
1326 static void fl_bind_class(void *fh, u32 classid, unsigned long cl)
1327 {
1328 struct cls_fl_filter *f = fh;
1329
1330 if (f && f->res.classid == classid)
1331 f->res.class = cl;
1332 }
1333
1334 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1335 .kind = "flower",
1336 .classify = fl_classify,
1337 .init = fl_init,
1338 .destroy = fl_destroy,
1339 .get = fl_get,
1340 .change = fl_change,
1341 .delete = fl_delete,
1342 .walk = fl_walk,
1343 .dump = fl_dump,
1344 .bind_class = fl_bind_class,
1345 .owner = THIS_MODULE,
1346 };
1347
1348 static int __init cls_fl_init(void)
1349 {
1350 return register_tcf_proto_ops(&cls_fl_ops);
1351 }
1352
1353 static void __exit cls_fl_exit(void)
1354 {
1355 unregister_tcf_proto_ops(&cls_fl_ops);
1356 }
1357
1358 module_init(cls_fl_init);
1359 module_exit(cls_fl_exit);
1360
1361 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
1362 MODULE_DESCRIPTION("Flower classifier");
1363 MODULE_LICENSE("GPL v2");
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