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[mirror_ubuntu-artful-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 u32 hgen;
72 bool mask_assigned;
73 struct list_head filters;
74 struct rhashtable_params ht_params;
75 union {
76 struct work_struct work;
77 struct rcu_head rcu;
78 };
79 };
80
81 struct 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 struct rcu_head rcu;
91 struct tc_to_netdev tc;
92 struct net_device *hw_dev;
93 };
94
95 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
96 {
97 return mask->range.end - mask->range.start;
98 }
99
100 static void fl_mask_update_range(struct fl_flow_mask *mask)
101 {
102 const u8 *bytes = (const u8 *) &mask->key;
103 size_t size = sizeof(mask->key);
104 size_t i, first = 0, last = size - 1;
105
106 for (i = 0; i < sizeof(mask->key); i++) {
107 if (bytes[i]) {
108 if (!first && i)
109 first = i;
110 last = i;
111 }
112 }
113 mask->range.start = rounddown(first, sizeof(long));
114 mask->range.end = roundup(last + 1, sizeof(long));
115 }
116
117 static void *fl_key_get_start(struct fl_flow_key *key,
118 const struct fl_flow_mask *mask)
119 {
120 return (u8 *) key + mask->range.start;
121 }
122
123 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
124 struct fl_flow_mask *mask)
125 {
126 const long *lkey = fl_key_get_start(key, mask);
127 const long *lmask = fl_key_get_start(&mask->key, mask);
128 long *lmkey = fl_key_get_start(mkey, mask);
129 int i;
130
131 for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
132 *lmkey++ = *lkey++ & *lmask++;
133 }
134
135 static void fl_clear_masked_range(struct fl_flow_key *key,
136 struct fl_flow_mask *mask)
137 {
138 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
139 }
140
141 static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head,
142 struct fl_flow_key *mkey)
143 {
144 return rhashtable_lookup_fast(&head->ht,
145 fl_key_get_start(mkey, &head->mask),
146 head->ht_params);
147 }
148
149 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
150 struct tcf_result *res)
151 {
152 struct cls_fl_head *head = rcu_dereference_bh(tp->root);
153 struct cls_fl_filter *f;
154 struct fl_flow_key skb_key;
155 struct fl_flow_key skb_mkey;
156 struct ip_tunnel_info *info;
157
158 if (!atomic_read(&head->ht.nelems))
159 return -1;
160
161 fl_clear_masked_range(&skb_key, &head->mask);
162
163 info = skb_tunnel_info(skb);
164 if (info) {
165 struct ip_tunnel_key *key = &info->key;
166
167 switch (ip_tunnel_info_af(info)) {
168 case AF_INET:
169 skb_key.enc_control.addr_type =
170 FLOW_DISSECTOR_KEY_IPV4_ADDRS;
171 skb_key.enc_ipv4.src = key->u.ipv4.src;
172 skb_key.enc_ipv4.dst = key->u.ipv4.dst;
173 break;
174 case AF_INET6:
175 skb_key.enc_control.addr_type =
176 FLOW_DISSECTOR_KEY_IPV6_ADDRS;
177 skb_key.enc_ipv6.src = key->u.ipv6.src;
178 skb_key.enc_ipv6.dst = key->u.ipv6.dst;
179 break;
180 }
181
182 skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id);
183 skb_key.enc_tp.src = key->tp_src;
184 skb_key.enc_tp.dst = key->tp_dst;
185 }
186
187 skb_key.indev_ifindex = skb->skb_iif;
188 /* skb_flow_dissect() does not set n_proto in case an unknown protocol,
189 * so do it rather here.
190 */
191 skb_key.basic.n_proto = skb->protocol;
192 skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
193
194 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
195
196 f = fl_lookup(head, &skb_mkey);
197 if (f && !tc_skip_sw(f->flags)) {
198 *res = f->res;
199 return tcf_exts_exec(skb, &f->exts, res);
200 }
201 return -1;
202 }
203
204 static int fl_init(struct tcf_proto *tp)
205 {
206 struct cls_fl_head *head;
207
208 head = kzalloc(sizeof(*head), GFP_KERNEL);
209 if (!head)
210 return -ENOBUFS;
211
212 INIT_LIST_HEAD_RCU(&head->filters);
213 rcu_assign_pointer(tp->root, head);
214
215 return 0;
216 }
217
218 static void fl_destroy_filter(struct rcu_head *head)
219 {
220 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
221
222 tcf_exts_destroy(&f->exts);
223 kfree(f);
224 }
225
226 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f)
227 {
228 struct tc_cls_flower_offload offload = {0};
229 struct net_device *dev = f->hw_dev;
230 struct tc_to_netdev *tc = &f->tc;
231
232 if (!tc_can_offload(dev, tp))
233 return;
234
235 offload.command = TC_CLSFLOWER_DESTROY;
236 offload.prio = tp->prio;
237 offload.cookie = (unsigned long)f;
238
239 tc->type = TC_SETUP_CLSFLOWER;
240 tc->cls_flower = &offload;
241
242 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->chain->index,
243 tp->protocol, tc);
244 }
245
246 static int fl_hw_replace_filter(struct tcf_proto *tp,
247 struct flow_dissector *dissector,
248 struct fl_flow_key *mask,
249 struct cls_fl_filter *f)
250 {
251 struct net_device *dev = tp->q->dev_queue->dev;
252 struct tc_cls_flower_offload offload = {0};
253 struct tc_to_netdev *tc = &f->tc;
254 int err;
255
256 if (!tc_can_offload(dev, tp)) {
257 if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) ||
258 (f->hw_dev && !tc_can_offload(f->hw_dev, tp))) {
259 f->hw_dev = dev;
260 return tc_skip_sw(f->flags) ? -EINVAL : 0;
261 }
262 dev = f->hw_dev;
263 tc->egress_dev = true;
264 } else {
265 f->hw_dev = dev;
266 }
267
268 offload.command = TC_CLSFLOWER_REPLACE;
269 offload.prio = tp->prio;
270 offload.cookie = (unsigned long)f;
271 offload.dissector = dissector;
272 offload.mask = mask;
273 offload.key = &f->mkey;
274 offload.exts = &f->exts;
275
276 tc->type = TC_SETUP_CLSFLOWER;
277 tc->cls_flower = &offload;
278
279 err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle,
280 tp->chain->index, tp->protocol, tc);
281 if (!err)
282 f->flags |= TCA_CLS_FLAGS_IN_HW;
283
284 if (tc_skip_sw(f->flags))
285 return err;
286 return 0;
287 }
288
289 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
290 {
291 struct tc_cls_flower_offload offload = {0};
292 struct net_device *dev = f->hw_dev;
293 struct tc_to_netdev *tc = &f->tc;
294
295 if (!tc_can_offload(dev, tp))
296 return;
297
298 offload.command = TC_CLSFLOWER_STATS;
299 offload.prio = tp->prio;
300 offload.cookie = (unsigned long)f;
301 offload.exts = &f->exts;
302
303 tc->type = TC_SETUP_CLSFLOWER;
304 tc->cls_flower = &offload;
305
306 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle,
307 tp->chain->index, tp->protocol, tc);
308 }
309
310 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
311 {
312 list_del_rcu(&f->list);
313 if (!tc_skip_hw(f->flags))
314 fl_hw_destroy_filter(tp, f);
315 tcf_unbind_filter(tp, &f->res);
316 call_rcu(&f->rcu, fl_destroy_filter);
317 }
318
319 static void fl_destroy_sleepable(struct work_struct *work)
320 {
321 struct cls_fl_head *head = container_of(work, struct cls_fl_head,
322 work);
323 if (head->mask_assigned)
324 rhashtable_destroy(&head->ht);
325 kfree(head);
326 module_put(THIS_MODULE);
327 }
328
329 static void fl_destroy_rcu(struct rcu_head *rcu)
330 {
331 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
332
333 INIT_WORK(&head->work, fl_destroy_sleepable);
334 schedule_work(&head->work);
335 }
336
337 static void fl_destroy(struct tcf_proto *tp)
338 {
339 struct cls_fl_head *head = rtnl_dereference(tp->root);
340 struct cls_fl_filter *f, *next;
341
342 list_for_each_entry_safe(f, next, &head->filters, list)
343 __fl_delete(tp, f);
344
345 __module_get(THIS_MODULE);
346 call_rcu(&head->rcu, fl_destroy_rcu);
347 }
348
349 static unsigned long fl_get(struct tcf_proto *tp, u32 handle)
350 {
351 struct cls_fl_head *head = rtnl_dereference(tp->root);
352 struct cls_fl_filter *f;
353
354 list_for_each_entry(f, &head->filters, list)
355 if (f->handle == handle)
356 return (unsigned long) f;
357 return 0;
358 }
359
360 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
361 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
362 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
363 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
364 .len = IFNAMSIZ },
365 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
366 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
367 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
368 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
369 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
370 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
371 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
372 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
373 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
374 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
375 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
376 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
377 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
378 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
379 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
380 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
381 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
382 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
383 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
384 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
385 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
386 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
387 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
388 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
389 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
390 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
391 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
392 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
393 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
394 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
395 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
396 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
397 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
398 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
399 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 },
400 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 },
401 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 },
402 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 },
403 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 },
404 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 },
405 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 },
406 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 },
407 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 },
408 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 },
409 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 },
410 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
411 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 },
412 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
413 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 },
414 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
415 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 },
416 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
417 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 },
418 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 },
419 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 },
420 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 },
421 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 },
422 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 },
423 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN },
424 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN },
425 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN },
426 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN },
427 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 },
428 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 },
429 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 },
430 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 },
431 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 },
432 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
433 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 },
434 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 },
435 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 },
436 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 },
437 };
438
439 static void fl_set_key_val(struct nlattr **tb,
440 void *val, int val_type,
441 void *mask, int mask_type, int len)
442 {
443 if (!tb[val_type])
444 return;
445 memcpy(val, nla_data(tb[val_type]), len);
446 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
447 memset(mask, 0xff, len);
448 else
449 memcpy(mask, nla_data(tb[mask_type]), len);
450 }
451
452 static int fl_set_key_mpls(struct nlattr **tb,
453 struct flow_dissector_key_mpls *key_val,
454 struct flow_dissector_key_mpls *key_mask)
455 {
456 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
457 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
458 key_mask->mpls_ttl = MPLS_TTL_MASK;
459 }
460 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
461 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
462
463 if (bos & ~MPLS_BOS_MASK)
464 return -EINVAL;
465 key_val->mpls_bos = bos;
466 key_mask->mpls_bos = MPLS_BOS_MASK;
467 }
468 if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
469 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
470
471 if (tc & ~MPLS_TC_MASK)
472 return -EINVAL;
473 key_val->mpls_tc = tc;
474 key_mask->mpls_tc = MPLS_TC_MASK;
475 }
476 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
477 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
478
479 if (label & ~MPLS_LABEL_MASK)
480 return -EINVAL;
481 key_val->mpls_label = label;
482 key_mask->mpls_label = MPLS_LABEL_MASK;
483 }
484 return 0;
485 }
486
487 static void fl_set_key_vlan(struct nlattr **tb,
488 struct flow_dissector_key_vlan *key_val,
489 struct flow_dissector_key_vlan *key_mask)
490 {
491 #define VLAN_PRIORITY_MASK 0x7
492
493 if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
494 key_val->vlan_id =
495 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
496 key_mask->vlan_id = VLAN_VID_MASK;
497 }
498 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
499 key_val->vlan_priority =
500 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
501 VLAN_PRIORITY_MASK;
502 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
503 }
504 }
505
506 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
507 u32 *dissector_key, u32 *dissector_mask,
508 u32 flower_flag_bit, u32 dissector_flag_bit)
509 {
510 if (flower_mask & flower_flag_bit) {
511 *dissector_mask |= dissector_flag_bit;
512 if (flower_key & flower_flag_bit)
513 *dissector_key |= dissector_flag_bit;
514 }
515 }
516
517 static int fl_set_key_flags(struct nlattr **tb,
518 u32 *flags_key, u32 *flags_mask)
519 {
520 u32 key, mask;
521
522 /* mask is mandatory for flags */
523 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
524 return -EINVAL;
525
526 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
527 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
528
529 *flags_key = 0;
530 *flags_mask = 0;
531
532 fl_set_key_flag(key, mask, flags_key, flags_mask,
533 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
534
535 return 0;
536 }
537
538 static void fl_set_key_ip(struct nlattr **tb,
539 struct flow_dissector_key_ip *key,
540 struct flow_dissector_key_ip *mask)
541 {
542 fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS,
543 &mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK,
544 sizeof(key->tos));
545
546 fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL,
547 &mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK,
548 sizeof(key->ttl));
549 }
550
551 static int fl_set_key(struct net *net, struct nlattr **tb,
552 struct fl_flow_key *key, struct fl_flow_key *mask)
553 {
554 __be16 ethertype;
555 int ret = 0;
556 #ifdef CONFIG_NET_CLS_IND
557 if (tb[TCA_FLOWER_INDEV]) {
558 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
559 if (err < 0)
560 return err;
561 key->indev_ifindex = err;
562 mask->indev_ifindex = 0xffffffff;
563 }
564 #endif
565
566 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
567 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
568 sizeof(key->eth.dst));
569 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
570 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
571 sizeof(key->eth.src));
572
573 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
574 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
575
576 if (ethertype == htons(ETH_P_8021Q)) {
577 fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
578 fl_set_key_val(tb, &key->basic.n_proto,
579 TCA_FLOWER_KEY_VLAN_ETH_TYPE,
580 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
581 sizeof(key->basic.n_proto));
582 } else {
583 key->basic.n_proto = ethertype;
584 mask->basic.n_proto = cpu_to_be16(~0);
585 }
586 }
587
588 if (key->basic.n_proto == htons(ETH_P_IP) ||
589 key->basic.n_proto == htons(ETH_P_IPV6)) {
590 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
591 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
592 sizeof(key->basic.ip_proto));
593 fl_set_key_ip(tb, &key->ip, &mask->ip);
594 }
595
596 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
597 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
598 mask->control.addr_type = ~0;
599 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
600 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
601 sizeof(key->ipv4.src));
602 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
603 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
604 sizeof(key->ipv4.dst));
605 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
606 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
607 mask->control.addr_type = ~0;
608 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
609 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
610 sizeof(key->ipv6.src));
611 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
612 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
613 sizeof(key->ipv6.dst));
614 }
615
616 if (key->basic.ip_proto == IPPROTO_TCP) {
617 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
618 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
619 sizeof(key->tp.src));
620 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
621 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
622 sizeof(key->tp.dst));
623 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
624 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
625 sizeof(key->tcp.flags));
626 } else if (key->basic.ip_proto == IPPROTO_UDP) {
627 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
628 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
629 sizeof(key->tp.src));
630 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
631 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
632 sizeof(key->tp.dst));
633 } else if (key->basic.ip_proto == IPPROTO_SCTP) {
634 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
635 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
636 sizeof(key->tp.src));
637 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
638 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
639 sizeof(key->tp.dst));
640 } else if (key->basic.n_proto == htons(ETH_P_IP) &&
641 key->basic.ip_proto == IPPROTO_ICMP) {
642 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
643 &mask->icmp.type,
644 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
645 sizeof(key->icmp.type));
646 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
647 &mask->icmp.code,
648 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
649 sizeof(key->icmp.code));
650 } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
651 key->basic.ip_proto == IPPROTO_ICMPV6) {
652 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
653 &mask->icmp.type,
654 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
655 sizeof(key->icmp.type));
656 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
657 &mask->icmp.code,
658 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
659 sizeof(key->icmp.code));
660 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
661 key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
662 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
663 if (ret)
664 return ret;
665 } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
666 key->basic.n_proto == htons(ETH_P_RARP)) {
667 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
668 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
669 sizeof(key->arp.sip));
670 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
671 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
672 sizeof(key->arp.tip));
673 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
674 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
675 sizeof(key->arp.op));
676 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
677 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
678 sizeof(key->arp.sha));
679 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
680 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
681 sizeof(key->arp.tha));
682 }
683
684 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
685 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
686 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
687 mask->enc_control.addr_type = ~0;
688 fl_set_key_val(tb, &key->enc_ipv4.src,
689 TCA_FLOWER_KEY_ENC_IPV4_SRC,
690 &mask->enc_ipv4.src,
691 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
692 sizeof(key->enc_ipv4.src));
693 fl_set_key_val(tb, &key->enc_ipv4.dst,
694 TCA_FLOWER_KEY_ENC_IPV4_DST,
695 &mask->enc_ipv4.dst,
696 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
697 sizeof(key->enc_ipv4.dst));
698 }
699
700 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
701 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
702 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
703 mask->enc_control.addr_type = ~0;
704 fl_set_key_val(tb, &key->enc_ipv6.src,
705 TCA_FLOWER_KEY_ENC_IPV6_SRC,
706 &mask->enc_ipv6.src,
707 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
708 sizeof(key->enc_ipv6.src));
709 fl_set_key_val(tb, &key->enc_ipv6.dst,
710 TCA_FLOWER_KEY_ENC_IPV6_DST,
711 &mask->enc_ipv6.dst,
712 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
713 sizeof(key->enc_ipv6.dst));
714 }
715
716 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
717 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
718 sizeof(key->enc_key_id.keyid));
719
720 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
721 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
722 sizeof(key->enc_tp.src));
723
724 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
725 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
726 sizeof(key->enc_tp.dst));
727
728 if (tb[TCA_FLOWER_KEY_FLAGS])
729 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
730
731 return ret;
732 }
733
734 static bool fl_mask_eq(struct fl_flow_mask *mask1,
735 struct fl_flow_mask *mask2)
736 {
737 const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
738 const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
739
740 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
741 !memcmp(lmask1, lmask2, fl_mask_range(mask1));
742 }
743
744 static const struct rhashtable_params fl_ht_params = {
745 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
746 .head_offset = offsetof(struct cls_fl_filter, ht_node),
747 .automatic_shrinking = true,
748 };
749
750 static int fl_init_hashtable(struct cls_fl_head *head,
751 struct fl_flow_mask *mask)
752 {
753 head->ht_params = fl_ht_params;
754 head->ht_params.key_len = fl_mask_range(mask);
755 head->ht_params.key_offset += mask->range.start;
756
757 return rhashtable_init(&head->ht, &head->ht_params);
758 }
759
760 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
761 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
762
763 #define FL_KEY_IS_MASKED(mask, member) \
764 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
765 0, FL_KEY_MEMBER_SIZE(member)) \
766
767 #define FL_KEY_SET(keys, cnt, id, member) \
768 do { \
769 keys[cnt].key_id = id; \
770 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
771 cnt++; \
772 } while(0);
773
774 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
775 do { \
776 if (FL_KEY_IS_MASKED(mask, member)) \
777 FL_KEY_SET(keys, cnt, id, member); \
778 } while(0);
779
780 static void fl_init_dissector(struct cls_fl_head *head,
781 struct fl_flow_mask *mask)
782 {
783 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
784 size_t cnt = 0;
785
786 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
787 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
788 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
789 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
790 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
791 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
792 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
793 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
794 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
795 FLOW_DISSECTOR_KEY_PORTS, tp);
796 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
797 FLOW_DISSECTOR_KEY_IP, ip);
798 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
799 FLOW_DISSECTOR_KEY_TCP, tcp);
800 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
801 FLOW_DISSECTOR_KEY_ICMP, icmp);
802 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
803 FLOW_DISSECTOR_KEY_ARP, arp);
804 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
805 FLOW_DISSECTOR_KEY_MPLS, mpls);
806 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
807 FLOW_DISSECTOR_KEY_VLAN, vlan);
808 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
809 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
810 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
811 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
812 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
813 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
814 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
815 FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
816 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
817 enc_control);
818 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
819 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
820
821 skb_flow_dissector_init(&head->dissector, keys, cnt);
822 }
823
824 static int fl_check_assign_mask(struct cls_fl_head *head,
825 struct fl_flow_mask *mask)
826 {
827 int err;
828
829 if (head->mask_assigned) {
830 if (!fl_mask_eq(&head->mask, mask))
831 return -EINVAL;
832 else
833 return 0;
834 }
835
836 /* Mask is not assigned yet. So assign it and init hashtable
837 * according to that.
838 */
839 err = fl_init_hashtable(head, mask);
840 if (err)
841 return err;
842 memcpy(&head->mask, mask, sizeof(head->mask));
843 head->mask_assigned = true;
844
845 fl_init_dissector(head, mask);
846
847 return 0;
848 }
849
850 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
851 struct cls_fl_filter *f, struct fl_flow_mask *mask,
852 unsigned long base, struct nlattr **tb,
853 struct nlattr *est, bool ovr)
854 {
855 struct tcf_exts e;
856 int err;
857
858 err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0);
859 if (err < 0)
860 return err;
861 err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
862 if (err < 0)
863 goto errout;
864
865 if (tb[TCA_FLOWER_CLASSID]) {
866 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
867 tcf_bind_filter(tp, &f->res, base);
868 }
869
870 err = fl_set_key(net, tb, &f->key, &mask->key);
871 if (err)
872 goto errout;
873
874 fl_mask_update_range(mask);
875 fl_set_masked_key(&f->mkey, &f->key, mask);
876
877 tcf_exts_change(tp, &f->exts, &e);
878
879 return 0;
880 errout:
881 tcf_exts_destroy(&e);
882 return err;
883 }
884
885 static u32 fl_grab_new_handle(struct tcf_proto *tp,
886 struct cls_fl_head *head)
887 {
888 unsigned int i = 0x80000000;
889 u32 handle;
890
891 do {
892 if (++head->hgen == 0x7FFFFFFF)
893 head->hgen = 1;
894 } while (--i > 0 && fl_get(tp, head->hgen));
895
896 if (unlikely(i == 0)) {
897 pr_err("Insufficient number of handles\n");
898 handle = 0;
899 } else {
900 handle = head->hgen;
901 }
902
903 return handle;
904 }
905
906 static int fl_change(struct net *net, struct sk_buff *in_skb,
907 struct tcf_proto *tp, unsigned long base,
908 u32 handle, struct nlattr **tca,
909 unsigned long *arg, bool ovr)
910 {
911 struct cls_fl_head *head = rtnl_dereference(tp->root);
912 struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg;
913 struct cls_fl_filter *fnew;
914 struct nlattr **tb;
915 struct fl_flow_mask mask = {};
916 int err;
917
918 if (!tca[TCA_OPTIONS])
919 return -EINVAL;
920
921 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
922 if (!tb)
923 return -ENOBUFS;
924
925 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
926 fl_policy, NULL);
927 if (err < 0)
928 goto errout_tb;
929
930 if (fold && handle && fold->handle != handle) {
931 err = -EINVAL;
932 goto errout_tb;
933 }
934
935 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
936 if (!fnew) {
937 err = -ENOBUFS;
938 goto errout_tb;
939 }
940
941 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
942 if (err < 0)
943 goto errout;
944
945 if (!handle) {
946 handle = fl_grab_new_handle(tp, head);
947 if (!handle) {
948 err = -EINVAL;
949 goto errout;
950 }
951 }
952 fnew->handle = handle;
953
954 if (tb[TCA_FLOWER_FLAGS]) {
955 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
956
957 if (!tc_flags_valid(fnew->flags)) {
958 err = -EINVAL;
959 goto errout;
960 }
961 }
962
963 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
964 if (err)
965 goto errout;
966
967 err = fl_check_assign_mask(head, &mask);
968 if (err)
969 goto errout;
970
971 if (!tc_skip_sw(fnew->flags)) {
972 if (!fold && fl_lookup(head, &fnew->mkey)) {
973 err = -EEXIST;
974 goto errout;
975 }
976
977 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
978 head->ht_params);
979 if (err)
980 goto errout;
981 }
982
983 if (!tc_skip_hw(fnew->flags)) {
984 err = fl_hw_replace_filter(tp,
985 &head->dissector,
986 &mask.key,
987 fnew);
988 if (err)
989 goto errout;
990 }
991
992 if (!tc_in_hw(fnew->flags))
993 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
994
995 if (fold) {
996 if (!tc_skip_sw(fold->flags))
997 rhashtable_remove_fast(&head->ht, &fold->ht_node,
998 head->ht_params);
999 if (!tc_skip_hw(fold->flags))
1000 fl_hw_destroy_filter(tp, fold);
1001 }
1002
1003 *arg = (unsigned long) fnew;
1004
1005 if (fold) {
1006 list_replace_rcu(&fold->list, &fnew->list);
1007 tcf_unbind_filter(tp, &fold->res);
1008 call_rcu(&fold->rcu, fl_destroy_filter);
1009 } else {
1010 list_add_tail_rcu(&fnew->list, &head->filters);
1011 }
1012
1013 kfree(tb);
1014 return 0;
1015
1016 errout:
1017 tcf_exts_destroy(&fnew->exts);
1018 kfree(fnew);
1019 errout_tb:
1020 kfree(tb);
1021 return err;
1022 }
1023
1024 static int fl_delete(struct tcf_proto *tp, unsigned long arg, bool *last)
1025 {
1026 struct cls_fl_head *head = rtnl_dereference(tp->root);
1027 struct cls_fl_filter *f = (struct cls_fl_filter *) arg;
1028
1029 if (!tc_skip_sw(f->flags))
1030 rhashtable_remove_fast(&head->ht, &f->ht_node,
1031 head->ht_params);
1032 __fl_delete(tp, f);
1033 *last = list_empty(&head->filters);
1034 return 0;
1035 }
1036
1037 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
1038 {
1039 struct cls_fl_head *head = rtnl_dereference(tp->root);
1040 struct cls_fl_filter *f;
1041
1042 list_for_each_entry_rcu(f, &head->filters, list) {
1043 if (arg->count < arg->skip)
1044 goto skip;
1045 if (arg->fn(tp, (unsigned long) f, arg) < 0) {
1046 arg->stop = 1;
1047 break;
1048 }
1049 skip:
1050 arg->count++;
1051 }
1052 }
1053
1054 static int fl_dump_key_val(struct sk_buff *skb,
1055 void *val, int val_type,
1056 void *mask, int mask_type, int len)
1057 {
1058 int err;
1059
1060 if (!memchr_inv(mask, 0, len))
1061 return 0;
1062 err = nla_put(skb, val_type, len, val);
1063 if (err)
1064 return err;
1065 if (mask_type != TCA_FLOWER_UNSPEC) {
1066 err = nla_put(skb, mask_type, len, mask);
1067 if (err)
1068 return err;
1069 }
1070 return 0;
1071 }
1072
1073 static int fl_dump_key_mpls(struct sk_buff *skb,
1074 struct flow_dissector_key_mpls *mpls_key,
1075 struct flow_dissector_key_mpls *mpls_mask)
1076 {
1077 int err;
1078
1079 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
1080 return 0;
1081 if (mpls_mask->mpls_ttl) {
1082 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
1083 mpls_key->mpls_ttl);
1084 if (err)
1085 return err;
1086 }
1087 if (mpls_mask->mpls_tc) {
1088 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
1089 mpls_key->mpls_tc);
1090 if (err)
1091 return err;
1092 }
1093 if (mpls_mask->mpls_label) {
1094 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
1095 mpls_key->mpls_label);
1096 if (err)
1097 return err;
1098 }
1099 if (mpls_mask->mpls_bos) {
1100 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
1101 mpls_key->mpls_bos);
1102 if (err)
1103 return err;
1104 }
1105 return 0;
1106 }
1107
1108 static int fl_dump_key_ip(struct sk_buff *skb,
1109 struct flow_dissector_key_ip *key,
1110 struct flow_dissector_key_ip *mask)
1111 {
1112 if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos,
1113 TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) ||
1114 fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl,
1115 TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl)))
1116 return -1;
1117
1118 return 0;
1119 }
1120
1121 static int fl_dump_key_vlan(struct sk_buff *skb,
1122 struct flow_dissector_key_vlan *vlan_key,
1123 struct flow_dissector_key_vlan *vlan_mask)
1124 {
1125 int err;
1126
1127 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1128 return 0;
1129 if (vlan_mask->vlan_id) {
1130 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
1131 vlan_key->vlan_id);
1132 if (err)
1133 return err;
1134 }
1135 if (vlan_mask->vlan_priority) {
1136 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
1137 vlan_key->vlan_priority);
1138 if (err)
1139 return err;
1140 }
1141 return 0;
1142 }
1143
1144 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1145 u32 *flower_key, u32 *flower_mask,
1146 u32 flower_flag_bit, u32 dissector_flag_bit)
1147 {
1148 if (dissector_mask & dissector_flag_bit) {
1149 *flower_mask |= flower_flag_bit;
1150 if (dissector_key & dissector_flag_bit)
1151 *flower_key |= flower_flag_bit;
1152 }
1153 }
1154
1155 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1156 {
1157 u32 key, mask;
1158 __be32 _key, _mask;
1159 int err;
1160
1161 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1162 return 0;
1163
1164 key = 0;
1165 mask = 0;
1166
1167 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1168 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1169
1170 _key = cpu_to_be32(key);
1171 _mask = cpu_to_be32(mask);
1172
1173 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1174 if (err)
1175 return err;
1176
1177 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1178 }
1179
1180 static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
1181 struct sk_buff *skb, struct tcmsg *t)
1182 {
1183 struct cls_fl_head *head = rtnl_dereference(tp->root);
1184 struct cls_fl_filter *f = (struct cls_fl_filter *) fh;
1185 struct nlattr *nest;
1186 struct fl_flow_key *key, *mask;
1187
1188 if (!f)
1189 return skb->len;
1190
1191 t->tcm_handle = f->handle;
1192
1193 nest = nla_nest_start(skb, TCA_OPTIONS);
1194 if (!nest)
1195 goto nla_put_failure;
1196
1197 if (f->res.classid &&
1198 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
1199 goto nla_put_failure;
1200
1201 key = &f->key;
1202 mask = &head->mask.key;
1203
1204 if (mask->indev_ifindex) {
1205 struct net_device *dev;
1206
1207 dev = __dev_get_by_index(net, key->indev_ifindex);
1208 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1209 goto nla_put_failure;
1210 }
1211
1212 if (!tc_skip_hw(f->flags))
1213 fl_hw_update_stats(tp, f);
1214
1215 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1216 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1217 sizeof(key->eth.dst)) ||
1218 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1219 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1220 sizeof(key->eth.src)) ||
1221 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1222 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1223 sizeof(key->basic.n_proto)))
1224 goto nla_put_failure;
1225
1226 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
1227 goto nla_put_failure;
1228
1229 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
1230 goto nla_put_failure;
1231
1232 if ((key->basic.n_proto == htons(ETH_P_IP) ||
1233 key->basic.n_proto == htons(ETH_P_IPV6)) &&
1234 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1235 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1236 sizeof(key->basic.ip_proto)) ||
1237 fl_dump_key_ip(skb, &key->ip, &mask->ip)))
1238 goto nla_put_failure;
1239
1240 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1241 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1242 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1243 sizeof(key->ipv4.src)) ||
1244 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1245 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1246 sizeof(key->ipv4.dst))))
1247 goto nla_put_failure;
1248 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1249 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1250 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1251 sizeof(key->ipv6.src)) ||
1252 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1253 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1254 sizeof(key->ipv6.dst))))
1255 goto nla_put_failure;
1256
1257 if (key->basic.ip_proto == IPPROTO_TCP &&
1258 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1259 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1260 sizeof(key->tp.src)) ||
1261 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1262 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1263 sizeof(key->tp.dst)) ||
1264 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1265 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1266 sizeof(key->tcp.flags))))
1267 goto nla_put_failure;
1268 else if (key->basic.ip_proto == IPPROTO_UDP &&
1269 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1270 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1271 sizeof(key->tp.src)) ||
1272 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1273 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1274 sizeof(key->tp.dst))))
1275 goto nla_put_failure;
1276 else if (key->basic.ip_proto == IPPROTO_SCTP &&
1277 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1278 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1279 sizeof(key->tp.src)) ||
1280 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1281 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1282 sizeof(key->tp.dst))))
1283 goto nla_put_failure;
1284 else if (key->basic.n_proto == htons(ETH_P_IP) &&
1285 key->basic.ip_proto == IPPROTO_ICMP &&
1286 (fl_dump_key_val(skb, &key->icmp.type,
1287 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1288 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1289 sizeof(key->icmp.type)) ||
1290 fl_dump_key_val(skb, &key->icmp.code,
1291 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1292 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1293 sizeof(key->icmp.code))))
1294 goto nla_put_failure;
1295 else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1296 key->basic.ip_proto == IPPROTO_ICMPV6 &&
1297 (fl_dump_key_val(skb, &key->icmp.type,
1298 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1299 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1300 sizeof(key->icmp.type)) ||
1301 fl_dump_key_val(skb, &key->icmp.code,
1302 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1303 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1304 sizeof(key->icmp.code))))
1305 goto nla_put_failure;
1306 else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1307 key->basic.n_proto == htons(ETH_P_RARP)) &&
1308 (fl_dump_key_val(skb, &key->arp.sip,
1309 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1310 TCA_FLOWER_KEY_ARP_SIP_MASK,
1311 sizeof(key->arp.sip)) ||
1312 fl_dump_key_val(skb, &key->arp.tip,
1313 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1314 TCA_FLOWER_KEY_ARP_TIP_MASK,
1315 sizeof(key->arp.tip)) ||
1316 fl_dump_key_val(skb, &key->arp.op,
1317 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1318 TCA_FLOWER_KEY_ARP_OP_MASK,
1319 sizeof(key->arp.op)) ||
1320 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1321 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1322 sizeof(key->arp.sha)) ||
1323 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1324 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1325 sizeof(key->arp.tha))))
1326 goto nla_put_failure;
1327
1328 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1329 (fl_dump_key_val(skb, &key->enc_ipv4.src,
1330 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1331 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1332 sizeof(key->enc_ipv4.src)) ||
1333 fl_dump_key_val(skb, &key->enc_ipv4.dst,
1334 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1335 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1336 sizeof(key->enc_ipv4.dst))))
1337 goto nla_put_failure;
1338 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1339 (fl_dump_key_val(skb, &key->enc_ipv6.src,
1340 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1341 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1342 sizeof(key->enc_ipv6.src)) ||
1343 fl_dump_key_val(skb, &key->enc_ipv6.dst,
1344 TCA_FLOWER_KEY_ENC_IPV6_DST,
1345 &mask->enc_ipv6.dst,
1346 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1347 sizeof(key->enc_ipv6.dst))))
1348 goto nla_put_failure;
1349
1350 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1351 &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1352 sizeof(key->enc_key_id)) ||
1353 fl_dump_key_val(skb, &key->enc_tp.src,
1354 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1355 &mask->enc_tp.src,
1356 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1357 sizeof(key->enc_tp.src)) ||
1358 fl_dump_key_val(skb, &key->enc_tp.dst,
1359 TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1360 &mask->enc_tp.dst,
1361 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1362 sizeof(key->enc_tp.dst)))
1363 goto nla_put_failure;
1364
1365 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1366 goto nla_put_failure;
1367
1368 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
1369 goto nla_put_failure;
1370
1371 if (tcf_exts_dump(skb, &f->exts))
1372 goto nla_put_failure;
1373
1374 nla_nest_end(skb, nest);
1375
1376 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
1377 goto nla_put_failure;
1378
1379 return skb->len;
1380
1381 nla_put_failure:
1382 nla_nest_cancel(skb, nest);
1383 return -1;
1384 }
1385
1386 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1387 .kind = "flower",
1388 .classify = fl_classify,
1389 .init = fl_init,
1390 .destroy = fl_destroy,
1391 .get = fl_get,
1392 .change = fl_change,
1393 .delete = fl_delete,
1394 .walk = fl_walk,
1395 .dump = fl_dump,
1396 .owner = THIS_MODULE,
1397 };
1398
1399 static int __init cls_fl_init(void)
1400 {
1401 return register_tcf_proto_ops(&cls_fl_ops);
1402 }
1403
1404 static void __exit cls_fl_exit(void)
1405 {
1406 unregister_tcf_proto_ops(&cls_fl_ops);
1407 }
1408
1409 module_init(cls_fl_init);
1410 module_exit(cls_fl_exit);
1411
1412 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
1413 MODULE_DESCRIPTION("Flower classifier");
1414 MODULE_LICENSE("GPL v2");
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