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