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12#include <linux/kernel.h>
13#include <linux/init.h>
14#include <linux/module.h>
15#include <linux/rhashtable.h>
16#include <linux/workqueue.h>
17
18#include <linux/if_ether.h>
19#include <linux/in6.h>
20#include <linux/ip.h>
21#include <linux/mpls.h>
22
23#include <net/sch_generic.h>
24#include <net/pkt_cls.h>
25#include <net/ip.h>
26#include <net/flow_dissector.h>
27
28#include <net/dst.h>
29#include <net/dst_metadata.h>
30
31struct fl_flow_key {
32 int indev_ifindex;
33 struct flow_dissector_key_control control;
34 struct flow_dissector_key_control enc_control;
35 struct flow_dissector_key_basic basic;
36 struct flow_dissector_key_eth_addrs eth;
37 struct flow_dissector_key_vlan vlan;
38 union {
39 struct flow_dissector_key_ipv4_addrs ipv4;
40 struct flow_dissector_key_ipv6_addrs ipv6;
41 };
42 struct flow_dissector_key_ports tp;
43 struct flow_dissector_key_icmp icmp;
44 struct flow_dissector_key_arp arp;
45 struct flow_dissector_key_keyid enc_key_id;
46 union {
47 struct flow_dissector_key_ipv4_addrs enc_ipv4;
48 struct flow_dissector_key_ipv6_addrs enc_ipv6;
49 };
50 struct flow_dissector_key_ports enc_tp;
51 struct flow_dissector_key_mpls mpls;
52} __aligned(BITS_PER_LONG / 8);
53
54struct fl_flow_mask_range {
55 unsigned short int start;
56 unsigned short int end;
57};
58
59struct fl_flow_mask {
60 struct fl_flow_key key;
61 struct fl_flow_mask_range range;
62 struct rcu_head rcu;
63};
64
65struct cls_fl_head {
66 struct rhashtable ht;
67 struct fl_flow_mask mask;
68 struct flow_dissector dissector;
69 u32 hgen;
70 bool mask_assigned;
71 struct list_head filters;
72 struct rhashtable_params ht_params;
73 union {
74 struct work_struct work;
75 struct rcu_head rcu;
76 };
77};
78
79struct cls_fl_filter {
80 struct rhash_head ht_node;
81 struct fl_flow_key mkey;
82 struct tcf_exts exts;
83 struct tcf_result res;
84 struct fl_flow_key key;
85 struct list_head list;
86 u32 handle;
87 u32 flags;
88 struct rcu_head rcu;
89 struct tc_to_netdev tc;
90 struct net_device *hw_dev;
91};
92
93static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
94{
95 return mask->range.end - mask->range.start;
96}
97
98static void fl_mask_update_range(struct fl_flow_mask *mask)
99{
100 const u8 *bytes = (const u8 *) &mask->key;
101 size_t size = sizeof(mask->key);
102 size_t i, first = 0, last = size - 1;
103
104 for (i = 0; i < sizeof(mask->key); i++) {
105 if (bytes[i]) {
106 if (!first && i)
107 first = i;
108 last = i;
109 }
110 }
111 mask->range.start = rounddown(first, sizeof(long));
112 mask->range.end = roundup(last + 1, sizeof(long));
113}
114
115static void *fl_key_get_start(struct fl_flow_key *key,
116 const struct fl_flow_mask *mask)
117{
118 return (u8 *) key + mask->range.start;
119}
120
121static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
122 struct fl_flow_mask *mask)
123{
124 const long *lkey = fl_key_get_start(key, mask);
125 const long *lmask = fl_key_get_start(&mask->key, mask);
126 long *lmkey = fl_key_get_start(mkey, mask);
127 int i;
128
129 for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
130 *lmkey++ = *lkey++ & *lmask++;
131}
132
133static void fl_clear_masked_range(struct fl_flow_key *key,
134 struct fl_flow_mask *mask)
135{
136 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
137}
138
139static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head,
140 struct fl_flow_key *mkey)
141{
142 return rhashtable_lookup_fast(&head->ht,
143 fl_key_get_start(mkey, &head->mask),
144 head->ht_params);
145}
146
147static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
148 struct tcf_result *res)
149{
150 struct cls_fl_head *head = rcu_dereference_bh(tp->root);
151 struct cls_fl_filter *f;
152 struct fl_flow_key skb_key;
153 struct fl_flow_key skb_mkey;
154 struct ip_tunnel_info *info;
155
156 if (!atomic_read(&head->ht.nelems))
157 return -1;
158
159 fl_clear_masked_range(&skb_key, &head->mask);
160
161 info = skb_tunnel_info(skb);
162 if (info) {
163 struct ip_tunnel_key *key = &info->key;
164
165 switch (ip_tunnel_info_af(info)) {
166 case AF_INET:
167 skb_key.enc_control.addr_type =
168 FLOW_DISSECTOR_KEY_IPV4_ADDRS;
169 skb_key.enc_ipv4.src = key->u.ipv4.src;
170 skb_key.enc_ipv4.dst = key->u.ipv4.dst;
171 break;
172 case AF_INET6:
173 skb_key.enc_control.addr_type =
174 FLOW_DISSECTOR_KEY_IPV6_ADDRS;
175 skb_key.enc_ipv6.src = key->u.ipv6.src;
176 skb_key.enc_ipv6.dst = key->u.ipv6.dst;
177 break;
178 }
179
180 skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id);
181 skb_key.enc_tp.src = key->tp_src;
182 skb_key.enc_tp.dst = key->tp_dst;
183 }
184
185 skb_key.indev_ifindex = skb->skb_iif;
186
187
188
189 skb_key.basic.n_proto = skb->protocol;
190 skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
191
192 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
193
194 f = fl_lookup(head, &skb_mkey);
195 if (f && !tc_skip_sw(f->flags)) {
196 *res = f->res;
197 return tcf_exts_exec(skb, &f->exts, res);
198 }
199 return -1;
200}
201
202static int fl_init(struct tcf_proto *tp)
203{
204 struct cls_fl_head *head;
205
206 head = kzalloc(sizeof(*head), GFP_KERNEL);
207 if (!head)
208 return -ENOBUFS;
209
210 INIT_LIST_HEAD_RCU(&head->filters);
211 rcu_assign_pointer(tp->root, head);
212
213 return 0;
214}
215
216static void fl_destroy_filter(struct rcu_head *head)
217{
218 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
219
220 tcf_exts_destroy(&f->exts);
221 kfree(f);
222}
223
224static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f)
225{
226 struct tc_cls_flower_offload offload = {0};
227 struct net_device *dev = f->hw_dev;
228 struct tc_to_netdev *tc = &f->tc;
229
230 if (!tc_can_offload(dev, tp))
231 return;
232
233 offload.command = TC_CLSFLOWER_DESTROY;
234 offload.prio = tp->prio;
235 offload.cookie = (unsigned long)f;
236
237 tc->type = TC_SETUP_CLSFLOWER;
238 tc->cls_flower = &offload;
239
240 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc);
241}
242
243static int fl_hw_replace_filter(struct tcf_proto *tp,
244 struct flow_dissector *dissector,
245 struct fl_flow_key *mask,
246 struct cls_fl_filter *f)
247{
248 struct net_device *dev = tp->q->dev_queue->dev;
249 struct tc_cls_flower_offload offload = {0};
250 struct tc_to_netdev *tc = &f->tc;
251 int err;
252
253 if (!tc_can_offload(dev, tp)) {
254 if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) ||
255 (f->hw_dev && !tc_can_offload(f->hw_dev, tp))) {
256 f->hw_dev = dev;
257 return tc_skip_sw(f->flags) ? -EINVAL : 0;
258 }
259 dev = f->hw_dev;
260 tc->egress_dev = true;
261 } else {
262 f->hw_dev = dev;
263 }
264
265 offload.command = TC_CLSFLOWER_REPLACE;
266 offload.prio = tp->prio;
267 offload.cookie = (unsigned long)f;
268 offload.dissector = dissector;
269 offload.mask = mask;
270 offload.key = &f->mkey;
271 offload.exts = &f->exts;
272
273 tc->type = TC_SETUP_CLSFLOWER;
274 tc->cls_flower = &offload;
275
276 err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol,
277 tc);
278 if (!err)
279 f->flags |= TCA_CLS_FLAGS_IN_HW;
280
281 if (tc_skip_sw(f->flags))
282 return err;
283 return 0;
284}
285
286static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
287{
288 struct tc_cls_flower_offload offload = {0};
289 struct net_device *dev = f->hw_dev;
290 struct tc_to_netdev *tc = &f->tc;
291
292 if (!tc_can_offload(dev, tp))
293 return;
294
295 offload.command = TC_CLSFLOWER_STATS;
296 offload.prio = tp->prio;
297 offload.cookie = (unsigned long)f;
298 offload.exts = &f->exts;
299
300 tc->type = TC_SETUP_CLSFLOWER;
301 tc->cls_flower = &offload;
302
303 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc);
304}
305
306static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
307{
308 list_del_rcu(&f->list);
309 if (!tc_skip_hw(f->flags))
310 fl_hw_destroy_filter(tp, f);
311 tcf_unbind_filter(tp, &f->res);
312 call_rcu(&f->rcu, fl_destroy_filter);
313}
314
315static void fl_destroy_sleepable(struct work_struct *work)
316{
317 struct cls_fl_head *head = container_of(work, struct cls_fl_head,
318 work);
319 if (head->mask_assigned)
320 rhashtable_destroy(&head->ht);
321 kfree(head);
322 module_put(THIS_MODULE);
323}
324
325static void fl_destroy_rcu(struct rcu_head *rcu)
326{
327 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
328
329 INIT_WORK(&head->work, fl_destroy_sleepable);
330 schedule_work(&head->work);
331}
332
333static void fl_destroy(struct tcf_proto *tp)
334{
335 struct cls_fl_head *head = rtnl_dereference(tp->root);
336 struct cls_fl_filter *f, *next;
337
338 list_for_each_entry_safe(f, next, &head->filters, list)
339 __fl_delete(tp, f);
340
341 __module_get(THIS_MODULE);
342 call_rcu(&head->rcu, fl_destroy_rcu);
343}
344
345static unsigned long fl_get(struct tcf_proto *tp, u32 handle)
346{
347 struct cls_fl_head *head = rtnl_dereference(tp->root);
348 struct cls_fl_filter *f;
349
350 list_for_each_entry(f, &head->filters, list)
351 if (f->handle == handle)
352 return (unsigned long) f;
353 return 0;
354}
355
356static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
357 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
358 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
359 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
360 .len = IFNAMSIZ },
361 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
362 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
363 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
364 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
365 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
366 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
367 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
368 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
369 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
370 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
371 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
372 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
373 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
374 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
375 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
376 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
377 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
378 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
379 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
380 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
381 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
382 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
383 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
384 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
385 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
386 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
387 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
388 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
389 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
390 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
391 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
392 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
393 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
394 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
395 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 },
396 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 },
397 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 },
398 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 },
399 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 },
400 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 },
401 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 },
402 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 },
403 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 },
404 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 },
405 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 },
406 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
407 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 },
408 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
409 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 },
410 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
411 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 },
412 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
413 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 },
414 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 },
415 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 },
416 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 },
417 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 },
418 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 },
419 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN },
420 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN },
421 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN },
422 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN },
423 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 },
424 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 },
425 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 },
426 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 },
427};
428
429static void fl_set_key_val(struct nlattr **tb,
430 void *val, int val_type,
431 void *mask, int mask_type, int len)
432{
433 if (!tb[val_type])
434 return;
435 memcpy(val, nla_data(tb[val_type]), len);
436 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
437 memset(mask, 0xff, len);
438 else
439 memcpy(mask, nla_data(tb[mask_type]), len);
440}
441
442static int fl_set_key_mpls(struct nlattr **tb,
443 struct flow_dissector_key_mpls *key_val,
444 struct flow_dissector_key_mpls *key_mask)
445{
446 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
447 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
448 key_mask->mpls_ttl = MPLS_TTL_MASK;
449 }
450 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
451 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
452
453 if (bos & ~MPLS_BOS_MASK)
454 return -EINVAL;
455 key_val->mpls_bos = bos;
456 key_mask->mpls_bos = MPLS_BOS_MASK;
457 }
458 if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
459 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
460
461 if (tc & ~MPLS_TC_MASK)
462 return -EINVAL;
463 key_val->mpls_tc = tc;
464 key_mask->mpls_tc = MPLS_TC_MASK;
465 }
466 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
467 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
468
469 if (label & ~MPLS_LABEL_MASK)
470 return -EINVAL;
471 key_val->mpls_label = label;
472 key_mask->mpls_label = MPLS_LABEL_MASK;
473 }
474 return 0;
475}
476
477static void fl_set_key_vlan(struct nlattr **tb,
478 struct flow_dissector_key_vlan *key_val,
479 struct flow_dissector_key_vlan *key_mask)
480{
481#define VLAN_PRIORITY_MASK 0x7
482
483 if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
484 key_val->vlan_id =
485 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
486 key_mask->vlan_id = VLAN_VID_MASK;
487 }
488 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
489 key_val->vlan_priority =
490 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
491 VLAN_PRIORITY_MASK;
492 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
493 }
494}
495
496static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
497 u32 *dissector_key, u32 *dissector_mask,
498 u32 flower_flag_bit, u32 dissector_flag_bit)
499{
500 if (flower_mask & flower_flag_bit) {
501 *dissector_mask |= dissector_flag_bit;
502 if (flower_key & flower_flag_bit)
503 *dissector_key |= dissector_flag_bit;
504 }
505}
506
507static int fl_set_key_flags(struct nlattr **tb,
508 u32 *flags_key, u32 *flags_mask)
509{
510 u32 key, mask;
511
512
513 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
514 return -EINVAL;
515
516 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
517 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
518
519 *flags_key = 0;
520 *flags_mask = 0;
521
522 fl_set_key_flag(key, mask, flags_key, flags_mask,
523 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
524
525 return 0;
526}
527
528static int fl_set_key(struct net *net, struct nlattr **tb,
529 struct fl_flow_key *key, struct fl_flow_key *mask)
530{
531 __be16 ethertype;
532 int ret = 0;
533#ifdef CONFIG_NET_CLS_IND
534 if (tb[TCA_FLOWER_INDEV]) {
535 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
536 if (err < 0)
537 return err;
538 key->indev_ifindex = err;
539 mask->indev_ifindex = 0xffffffff;
540 }
541#endif
542
543 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
544 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
545 sizeof(key->eth.dst));
546 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
547 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
548 sizeof(key->eth.src));
549
550 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
551 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
552
553 if (ethertype == htons(ETH_P_8021Q)) {
554 fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
555 fl_set_key_val(tb, &key->basic.n_proto,
556 TCA_FLOWER_KEY_VLAN_ETH_TYPE,
557 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
558 sizeof(key->basic.n_proto));
559 } else {
560 key->basic.n_proto = ethertype;
561 mask->basic.n_proto = cpu_to_be16(~0);
562 }
563 }
564
565 if (key->basic.n_proto == htons(ETH_P_IP) ||
566 key->basic.n_proto == htons(ETH_P_IPV6)) {
567 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
568 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
569 sizeof(key->basic.ip_proto));
570 }
571
572 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
573 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
574 mask->control.addr_type = ~0;
575 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
576 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
577 sizeof(key->ipv4.src));
578 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
579 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
580 sizeof(key->ipv4.dst));
581 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
582 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
583 mask->control.addr_type = ~0;
584 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
585 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
586 sizeof(key->ipv6.src));
587 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
588 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
589 sizeof(key->ipv6.dst));
590 }
591
592 if (key->basic.ip_proto == IPPROTO_TCP) {
593 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
594 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
595 sizeof(key->tp.src));
596 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
597 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
598 sizeof(key->tp.dst));
599 } else if (key->basic.ip_proto == IPPROTO_UDP) {
600 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
601 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
602 sizeof(key->tp.src));
603 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
604 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
605 sizeof(key->tp.dst));
606 } else if (key->basic.ip_proto == IPPROTO_SCTP) {
607 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
608 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
609 sizeof(key->tp.src));
610 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
611 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
612 sizeof(key->tp.dst));
613 } else if (key->basic.n_proto == htons(ETH_P_IP) &&
614 key->basic.ip_proto == IPPROTO_ICMP) {
615 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
616 &mask->icmp.type,
617 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
618 sizeof(key->icmp.type));
619 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
620 &mask->icmp.code,
621 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
622 sizeof(key->icmp.code));
623 } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
624 key->basic.ip_proto == IPPROTO_ICMPV6) {
625 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
626 &mask->icmp.type,
627 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
628 sizeof(key->icmp.type));
629 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
630 &mask->icmp.code,
631 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
632 sizeof(key->icmp.code));
633 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
634 key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
635 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
636 if (ret)
637 return ret;
638 } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
639 key->basic.n_proto == htons(ETH_P_RARP)) {
640 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
641 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
642 sizeof(key->arp.sip));
643 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
644 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
645 sizeof(key->arp.tip));
646 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
647 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
648 sizeof(key->arp.op));
649 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
650 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
651 sizeof(key->arp.sha));
652 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
653 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
654 sizeof(key->arp.tha));
655 }
656
657 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
658 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
659 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
660 mask->enc_control.addr_type = ~0;
661 fl_set_key_val(tb, &key->enc_ipv4.src,
662 TCA_FLOWER_KEY_ENC_IPV4_SRC,
663 &mask->enc_ipv4.src,
664 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
665 sizeof(key->enc_ipv4.src));
666 fl_set_key_val(tb, &key->enc_ipv4.dst,
667 TCA_FLOWER_KEY_ENC_IPV4_DST,
668 &mask->enc_ipv4.dst,
669 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
670 sizeof(key->enc_ipv4.dst));
671 }
672
673 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
674 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
675 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
676 mask->enc_control.addr_type = ~0;
677 fl_set_key_val(tb, &key->enc_ipv6.src,
678 TCA_FLOWER_KEY_ENC_IPV6_SRC,
679 &mask->enc_ipv6.src,
680 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
681 sizeof(key->enc_ipv6.src));
682 fl_set_key_val(tb, &key->enc_ipv6.dst,
683 TCA_FLOWER_KEY_ENC_IPV6_DST,
684 &mask->enc_ipv6.dst,
685 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
686 sizeof(key->enc_ipv6.dst));
687 }
688
689 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
690 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
691 sizeof(key->enc_key_id.keyid));
692
693 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
694 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
695 sizeof(key->enc_tp.src));
696
697 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
698 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
699 sizeof(key->enc_tp.dst));
700
701 if (tb[TCA_FLOWER_KEY_FLAGS])
702 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
703
704 return ret;
705}
706
707static bool fl_mask_eq(struct fl_flow_mask *mask1,
708 struct fl_flow_mask *mask2)
709{
710 const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
711 const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
712
713 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
714 !memcmp(lmask1, lmask2, fl_mask_range(mask1));
715}
716
717static const struct rhashtable_params fl_ht_params = {
718 .key_offset = offsetof(struct cls_fl_filter, mkey),
719 .head_offset = offsetof(struct cls_fl_filter, ht_node),
720 .automatic_shrinking = true,
721};
722
723static int fl_init_hashtable(struct cls_fl_head *head,
724 struct fl_flow_mask *mask)
725{
726 head->ht_params = fl_ht_params;
727 head->ht_params.key_len = fl_mask_range(mask);
728 head->ht_params.key_offset += mask->range.start;
729
730 return rhashtable_init(&head->ht, &head->ht_params);
731}
732
733#define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
734#define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
735
736#define FL_KEY_IS_MASKED(mask, member) \
737 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
738 0, FL_KEY_MEMBER_SIZE(member)) \
739
740#define FL_KEY_SET(keys, cnt, id, member) \
741 do { \
742 keys[cnt].key_id = id; \
743 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
744 cnt++; \
745 } while(0);
746
747#define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
748 do { \
749 if (FL_KEY_IS_MASKED(mask, member)) \
750 FL_KEY_SET(keys, cnt, id, member); \
751 } while(0);
752
753static void fl_init_dissector(struct cls_fl_head *head,
754 struct fl_flow_mask *mask)
755{
756 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
757 size_t cnt = 0;
758
759 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
760 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
761 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
762 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
763 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
764 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
765 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
766 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
767 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
768 FLOW_DISSECTOR_KEY_PORTS, tp);
769 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
770 FLOW_DISSECTOR_KEY_ICMP, icmp);
771 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
772 FLOW_DISSECTOR_KEY_ARP, arp);
773 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
774 FLOW_DISSECTOR_KEY_MPLS, mpls);
775 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
776 FLOW_DISSECTOR_KEY_VLAN, vlan);
777 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
778 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
779 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
780 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
781 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
782 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
783 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
784 FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
785 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
786 enc_control);
787 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
788 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
789
790 skb_flow_dissector_init(&head->dissector, keys, cnt);
791}
792
793static int fl_check_assign_mask(struct cls_fl_head *head,
794 struct fl_flow_mask *mask)
795{
796 int err;
797
798 if (head->mask_assigned) {
799 if (!fl_mask_eq(&head->mask, mask))
800 return -EINVAL;
801 else
802 return 0;
803 }
804
805
806
807
808 err = fl_init_hashtable(head, mask);
809 if (err)
810 return err;
811 memcpy(&head->mask, mask, sizeof(head->mask));
812 head->mask_assigned = true;
813
814 fl_init_dissector(head, mask);
815
816 return 0;
817}
818
819static int fl_set_parms(struct net *net, struct tcf_proto *tp,
820 struct cls_fl_filter *f, struct fl_flow_mask *mask,
821 unsigned long base, struct nlattr **tb,
822 struct nlattr *est, bool ovr)
823{
824 struct tcf_exts e;
825 int err;
826
827 err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0);
828 if (err < 0)
829 return err;
830 err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
831 if (err < 0)
832 goto errout;
833
834 if (tb[TCA_FLOWER_CLASSID]) {
835 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
836 tcf_bind_filter(tp, &f->res, base);
837 }
838
839 err = fl_set_key(net, tb, &f->key, &mask->key);
840 if (err)
841 goto errout;
842
843 fl_mask_update_range(mask);
844 fl_set_masked_key(&f->mkey, &f->key, mask);
845
846 tcf_exts_change(tp, &f->exts, &e);
847
848 return 0;
849errout:
850 tcf_exts_destroy(&e);
851 return err;
852}
853
854static u32 fl_grab_new_handle(struct tcf_proto *tp,
855 struct cls_fl_head *head)
856{
857 unsigned int i = 0x80000000;
858 u32 handle;
859
860 do {
861 if (++head->hgen == 0x7FFFFFFF)
862 head->hgen = 1;
863 } while (--i > 0 && fl_get(tp, head->hgen));
864
865 if (unlikely(i == 0)) {
866 pr_err("Insufficient number of handles\n");
867 handle = 0;
868 } else {
869 handle = head->hgen;
870 }
871
872 return handle;
873}
874
875static int fl_change(struct net *net, struct sk_buff *in_skb,
876 struct tcf_proto *tp, unsigned long base,
877 u32 handle, struct nlattr **tca,
878 unsigned long *arg, bool ovr)
879{
880 struct cls_fl_head *head = rtnl_dereference(tp->root);
881 struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg;
882 struct cls_fl_filter *fnew;
883 struct nlattr **tb;
884 struct fl_flow_mask mask = {};
885 int err;
886
887 if (!tca[TCA_OPTIONS])
888 return -EINVAL;
889
890 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
891 if (!tb)
892 return -ENOBUFS;
893
894 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
895 fl_policy, NULL);
896 if (err < 0)
897 goto errout_tb;
898
899 if (fold && handle && fold->handle != handle) {
900 err = -EINVAL;
901 goto errout_tb;
902 }
903
904 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
905 if (!fnew) {
906 err = -ENOBUFS;
907 goto errout_tb;
908 }
909
910 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
911 if (err < 0)
912 goto errout;
913
914 if (!handle) {
915 handle = fl_grab_new_handle(tp, head);
916 if (!handle) {
917 err = -EINVAL;
918 goto errout;
919 }
920 }
921 fnew->handle = handle;
922
923 if (tb[TCA_FLOWER_FLAGS]) {
924 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
925
926 if (!tc_flags_valid(fnew->flags)) {
927 err = -EINVAL;
928 goto errout;
929 }
930 }
931
932 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
933 if (err)
934 goto errout;
935
936 err = fl_check_assign_mask(head, &mask);
937 if (err)
938 goto errout;
939
940 if (!tc_skip_sw(fnew->flags)) {
941 if (!fold && fl_lookup(head, &fnew->mkey)) {
942 err = -EEXIST;
943 goto errout;
944 }
945
946 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
947 head->ht_params);
948 if (err)
949 goto errout;
950 }
951
952 if (!tc_skip_hw(fnew->flags)) {
953 err = fl_hw_replace_filter(tp,
954 &head->dissector,
955 &mask.key,
956 fnew);
957 if (err)
958 goto errout;
959 }
960
961 if (!tc_in_hw(fnew->flags))
962 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
963
964 if (fold) {
965 if (!tc_skip_sw(fold->flags))
966 rhashtable_remove_fast(&head->ht, &fold->ht_node,
967 head->ht_params);
968 if (!tc_skip_hw(fold->flags))
969 fl_hw_destroy_filter(tp, fold);
970 }
971
972 *arg = (unsigned long) fnew;
973
974 if (fold) {
975 list_replace_rcu(&fold->list, &fnew->list);
976 tcf_unbind_filter(tp, &fold->res);
977 call_rcu(&fold->rcu, fl_destroy_filter);
978 } else {
979 list_add_tail_rcu(&fnew->list, &head->filters);
980 }
981
982 kfree(tb);
983 return 0;
984
985errout:
986 tcf_exts_destroy(&fnew->exts);
987 kfree(fnew);
988errout_tb:
989 kfree(tb);
990 return err;
991}
992
993static int fl_delete(struct tcf_proto *tp, unsigned long arg, bool *last)
994{
995 struct cls_fl_head *head = rtnl_dereference(tp->root);
996 struct cls_fl_filter *f = (struct cls_fl_filter *) arg;
997
998 if (!tc_skip_sw(f->flags))
999 rhashtable_remove_fast(&head->ht, &f->ht_node,
1000 head->ht_params);
1001 __fl_delete(tp, f);
1002 *last = list_empty(&head->filters);
1003 return 0;
1004}
1005
1006static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
1007{
1008 struct cls_fl_head *head = rtnl_dereference(tp->root);
1009 struct cls_fl_filter *f;
1010
1011 list_for_each_entry_rcu(f, &head->filters, list) {
1012 if (arg->count < arg->skip)
1013 goto skip;
1014 if (arg->fn(tp, (unsigned long) f, arg) < 0) {
1015 arg->stop = 1;
1016 break;
1017 }
1018skip:
1019 arg->count++;
1020 }
1021}
1022
1023static int fl_dump_key_val(struct sk_buff *skb,
1024 void *val, int val_type,
1025 void *mask, int mask_type, int len)
1026{
1027 int err;
1028
1029 if (!memchr_inv(mask, 0, len))
1030 return 0;
1031 err = nla_put(skb, val_type, len, val);
1032 if (err)
1033 return err;
1034 if (mask_type != TCA_FLOWER_UNSPEC) {
1035 err = nla_put(skb, mask_type, len, mask);
1036 if (err)
1037 return err;
1038 }
1039 return 0;
1040}
1041
1042static int fl_dump_key_mpls(struct sk_buff *skb,
1043 struct flow_dissector_key_mpls *mpls_key,
1044 struct flow_dissector_key_mpls *mpls_mask)
1045{
1046 int err;
1047
1048 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
1049 return 0;
1050 if (mpls_mask->mpls_ttl) {
1051 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
1052 mpls_key->mpls_ttl);
1053 if (err)
1054 return err;
1055 }
1056 if (mpls_mask->mpls_tc) {
1057 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
1058 mpls_key->mpls_tc);
1059 if (err)
1060 return err;
1061 }
1062 if (mpls_mask->mpls_label) {
1063 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
1064 mpls_key->mpls_label);
1065 if (err)
1066 return err;
1067 }
1068 if (mpls_mask->mpls_bos) {
1069 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
1070 mpls_key->mpls_bos);
1071 if (err)
1072 return err;
1073 }
1074 return 0;
1075}
1076
1077static int fl_dump_key_vlan(struct sk_buff *skb,
1078 struct flow_dissector_key_vlan *vlan_key,
1079 struct flow_dissector_key_vlan *vlan_mask)
1080{
1081 int err;
1082
1083 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1084 return 0;
1085 if (vlan_mask->vlan_id) {
1086 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
1087 vlan_key->vlan_id);
1088 if (err)
1089 return err;
1090 }
1091 if (vlan_mask->vlan_priority) {
1092 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
1093 vlan_key->vlan_priority);
1094 if (err)
1095 return err;
1096 }
1097 return 0;
1098}
1099
1100static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1101 u32 *flower_key, u32 *flower_mask,
1102 u32 flower_flag_bit, u32 dissector_flag_bit)
1103{
1104 if (dissector_mask & dissector_flag_bit) {
1105 *flower_mask |= flower_flag_bit;
1106 if (dissector_key & dissector_flag_bit)
1107 *flower_key |= flower_flag_bit;
1108 }
1109}
1110
1111static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1112{
1113 u32 key, mask;
1114 __be32 _key, _mask;
1115 int err;
1116
1117 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1118 return 0;
1119
1120 key = 0;
1121 mask = 0;
1122
1123 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1124 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1125
1126 _key = cpu_to_be32(key);
1127 _mask = cpu_to_be32(mask);
1128
1129 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1130 if (err)
1131 return err;
1132
1133 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1134}
1135
1136static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
1137 struct sk_buff *skb, struct tcmsg *t)
1138{
1139 struct cls_fl_head *head = rtnl_dereference(tp->root);
1140 struct cls_fl_filter *f = (struct cls_fl_filter *) fh;
1141 struct nlattr *nest;
1142 struct fl_flow_key *key, *mask;
1143
1144 if (!f)
1145 return skb->len;
1146
1147 t->tcm_handle = f->handle;
1148
1149 nest = nla_nest_start(skb, TCA_OPTIONS);
1150 if (!nest)
1151 goto nla_put_failure;
1152
1153 if (f->res.classid &&
1154 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
1155 goto nla_put_failure;
1156
1157 key = &f->key;
1158 mask = &head->mask.key;
1159
1160 if (mask->indev_ifindex) {
1161 struct net_device *dev;
1162
1163 dev = __dev_get_by_index(net, key->indev_ifindex);
1164 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1165 goto nla_put_failure;
1166 }
1167
1168 if (!tc_skip_hw(f->flags))
1169 fl_hw_update_stats(tp, f);
1170
1171 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1172 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1173 sizeof(key->eth.dst)) ||
1174 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1175 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1176 sizeof(key->eth.src)) ||
1177 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1178 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1179 sizeof(key->basic.n_proto)))
1180 goto nla_put_failure;
1181
1182 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
1183 goto nla_put_failure;
1184
1185 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
1186 goto nla_put_failure;
1187
1188 if ((key->basic.n_proto == htons(ETH_P_IP) ||
1189 key->basic.n_proto == htons(ETH_P_IPV6)) &&
1190 fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1191 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1192 sizeof(key->basic.ip_proto)))
1193 goto nla_put_failure;
1194
1195 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1196 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1197 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1198 sizeof(key->ipv4.src)) ||
1199 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1200 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1201 sizeof(key->ipv4.dst))))
1202 goto nla_put_failure;
1203 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1204 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1205 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1206 sizeof(key->ipv6.src)) ||
1207 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1208 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1209 sizeof(key->ipv6.dst))))
1210 goto nla_put_failure;
1211
1212 if (key->basic.ip_proto == IPPROTO_TCP &&
1213 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1214 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1215 sizeof(key->tp.src)) ||
1216 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1217 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1218 sizeof(key->tp.dst))))
1219 goto nla_put_failure;
1220 else if (key->basic.ip_proto == IPPROTO_UDP &&
1221 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1222 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1223 sizeof(key->tp.src)) ||
1224 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1225 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1226 sizeof(key->tp.dst))))
1227 goto nla_put_failure;
1228 else if (key->basic.ip_proto == IPPROTO_SCTP &&
1229 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1230 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1231 sizeof(key->tp.src)) ||
1232 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1233 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1234 sizeof(key->tp.dst))))
1235 goto nla_put_failure;
1236 else if (key->basic.n_proto == htons(ETH_P_IP) &&
1237 key->basic.ip_proto == IPPROTO_ICMP &&
1238 (fl_dump_key_val(skb, &key->icmp.type,
1239 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1240 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1241 sizeof(key->icmp.type)) ||
1242 fl_dump_key_val(skb, &key->icmp.code,
1243 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1244 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1245 sizeof(key->icmp.code))))
1246 goto nla_put_failure;
1247 else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1248 key->basic.ip_proto == IPPROTO_ICMPV6 &&
1249 (fl_dump_key_val(skb, &key->icmp.type,
1250 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1251 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1252 sizeof(key->icmp.type)) ||
1253 fl_dump_key_val(skb, &key->icmp.code,
1254 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1255 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1256 sizeof(key->icmp.code))))
1257 goto nla_put_failure;
1258 else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1259 key->basic.n_proto == htons(ETH_P_RARP)) &&
1260 (fl_dump_key_val(skb, &key->arp.sip,
1261 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1262 TCA_FLOWER_KEY_ARP_SIP_MASK,
1263 sizeof(key->arp.sip)) ||
1264 fl_dump_key_val(skb, &key->arp.tip,
1265 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1266 TCA_FLOWER_KEY_ARP_TIP_MASK,
1267 sizeof(key->arp.tip)) ||
1268 fl_dump_key_val(skb, &key->arp.op,
1269 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1270 TCA_FLOWER_KEY_ARP_OP_MASK,
1271 sizeof(key->arp.op)) ||
1272 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1273 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1274 sizeof(key->arp.sha)) ||
1275 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1276 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1277 sizeof(key->arp.tha))))
1278 goto nla_put_failure;
1279
1280 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1281 (fl_dump_key_val(skb, &key->enc_ipv4.src,
1282 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1283 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1284 sizeof(key->enc_ipv4.src)) ||
1285 fl_dump_key_val(skb, &key->enc_ipv4.dst,
1286 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1287 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1288 sizeof(key->enc_ipv4.dst))))
1289 goto nla_put_failure;
1290 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1291 (fl_dump_key_val(skb, &key->enc_ipv6.src,
1292 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1293 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1294 sizeof(key->enc_ipv6.src)) ||
1295 fl_dump_key_val(skb, &key->enc_ipv6.dst,
1296 TCA_FLOWER_KEY_ENC_IPV6_DST,
1297 &mask->enc_ipv6.dst,
1298 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1299 sizeof(key->enc_ipv6.dst))))
1300 goto nla_put_failure;
1301
1302 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1303 &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1304 sizeof(key->enc_key_id)) ||
1305 fl_dump_key_val(skb, &key->enc_tp.src,
1306 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1307 &mask->enc_tp.src,
1308 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1309 sizeof(key->enc_tp.src)) ||
1310 fl_dump_key_val(skb, &key->enc_tp.dst,
1311 TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1312 &mask->enc_tp.dst,
1313 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1314 sizeof(key->enc_tp.dst)))
1315 goto nla_put_failure;
1316
1317 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1318 goto nla_put_failure;
1319
1320 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
1321 goto nla_put_failure;
1322
1323 if (tcf_exts_dump(skb, &f->exts))
1324 goto nla_put_failure;
1325
1326 nla_nest_end(skb, nest);
1327
1328 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
1329 goto nla_put_failure;
1330
1331 return skb->len;
1332
1333nla_put_failure:
1334 nla_nest_cancel(skb, nest);
1335 return -1;
1336}
1337
1338static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1339 .kind = "flower",
1340 .classify = fl_classify,
1341 .init = fl_init,
1342 .destroy = fl_destroy,
1343 .get = fl_get,
1344 .change = fl_change,
1345 .delete = fl_delete,
1346 .walk = fl_walk,
1347 .dump = fl_dump,
1348 .owner = THIS_MODULE,
1349};
1350
1351static int __init cls_fl_init(void)
1352{
1353 return register_tcf_proto_ops(&cls_fl_ops);
1354}
1355
1356static void __exit cls_fl_exit(void)
1357{
1358 unregister_tcf_proto_ops(&cls_fl_ops);
1359}
1360
1361module_init(cls_fl_init);
1362module_exit(cls_fl_exit);
1363
1364MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
1365MODULE_DESCRIPTION("Flower classifier");
1366MODULE_LICENSE("GPL v2");
1367
