2 * net/sched/cls_flower.c Flower classifier
4 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
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.
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>
18 #include <linux/if_ether.h>
19 #include <linux/in6.h>
22 #include <net/sch_generic.h>
23 #include <net/pkt_cls.h>
25 #include <net/flow_dissector.h>
28 #include <net/dst_metadata.h>
32 struct flow_dissector_key_control control;
33 struct flow_dissector_key_control enc_control;
34 struct flow_dissector_key_basic basic;
35 struct flow_dissector_key_eth_addrs eth;
36 struct flow_dissector_key_vlan vlan;
38 struct flow_dissector_key_ipv4_addrs ipv4;
39 struct flow_dissector_key_ipv6_addrs ipv6;
41 struct flow_dissector_key_ports tp;
42 struct flow_dissector_key_keyid enc_key_id;
44 struct flow_dissector_key_ipv4_addrs enc_ipv4;
45 struct flow_dissector_key_ipv6_addrs enc_ipv6;
47 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
49 struct fl_flow_mask_range {
50 unsigned short int start;
51 unsigned short int end;
55 struct fl_flow_key key;
56 struct fl_flow_mask_range range;
62 struct fl_flow_mask mask;
63 struct flow_dissector dissector;
66 struct list_head filters;
67 struct rhashtable_params ht_params;
69 struct work_struct work;
74 struct cls_fl_filter {
75 struct rhash_head ht_node;
76 struct fl_flow_key mkey;
78 struct tcf_result res;
79 struct fl_flow_key key;
80 struct list_head list;
86 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
88 return mask->range.end - mask->range.start;
91 static void fl_mask_update_range(struct fl_flow_mask *mask)
93 const u8 *bytes = (const u8 *) &mask->key;
94 size_t size = sizeof(mask->key);
95 size_t i, first = 0, last = size - 1;
97 for (i = 0; i < sizeof(mask->key); i++) {
104 mask->range.start = rounddown(first, sizeof(long));
105 mask->range.end = roundup(last + 1, sizeof(long));
108 static void *fl_key_get_start(struct fl_flow_key *key,
109 const struct fl_flow_mask *mask)
111 return (u8 *) key + mask->range.start;
114 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
115 struct fl_flow_mask *mask)
117 const long *lkey = fl_key_get_start(key, mask);
118 const long *lmask = fl_key_get_start(&mask->key, mask);
119 long *lmkey = fl_key_get_start(mkey, mask);
122 for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
123 *lmkey++ = *lkey++ & *lmask++;
126 static void fl_clear_masked_range(struct fl_flow_key *key,
127 struct fl_flow_mask *mask)
129 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
132 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
133 struct tcf_result *res)
135 struct cls_fl_head *head = rcu_dereference_bh(tp->root);
136 struct cls_fl_filter *f;
137 struct fl_flow_key skb_key;
138 struct fl_flow_key skb_mkey;
139 struct ip_tunnel_info *info;
141 if (!atomic_read(&head->ht.nelems))
144 fl_clear_masked_range(&skb_key, &head->mask);
146 info = skb_tunnel_info(skb);
148 struct ip_tunnel_key *key = &info->key;
150 switch (ip_tunnel_info_af(info)) {
152 skb_key.enc_ipv4.src = key->u.ipv4.src;
153 skb_key.enc_ipv4.dst = key->u.ipv4.dst;
156 skb_key.enc_ipv6.src = key->u.ipv6.src;
157 skb_key.enc_ipv6.dst = key->u.ipv6.dst;
161 skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id);
164 skb_key.indev_ifindex = skb->skb_iif;
165 /* skb_flow_dissect() does not set n_proto in case an unknown protocol,
166 * so do it rather here.
168 skb_key.basic.n_proto = skb->protocol;
169 skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
171 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
173 f = rhashtable_lookup_fast(&head->ht,
174 fl_key_get_start(&skb_mkey, &head->mask),
176 if (f && !tc_skip_sw(f->flags)) {
178 return tcf_exts_exec(skb, &f->exts, res);
183 static int fl_init(struct tcf_proto *tp)
185 struct cls_fl_head *head;
187 head = kzalloc(sizeof(*head), GFP_KERNEL);
191 INIT_LIST_HEAD_RCU(&head->filters);
192 rcu_assign_pointer(tp->root, head);
197 static void fl_destroy_filter(struct rcu_head *head)
199 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
201 tcf_exts_destroy(&f->exts);
205 static void fl_hw_destroy_filter(struct tcf_proto *tp, unsigned long cookie)
207 struct net_device *dev = tp->q->dev_queue->dev;
208 struct tc_cls_flower_offload offload = {0};
209 struct tc_to_netdev tc;
211 if (!tc_should_offload(dev, tp, 0))
214 offload.command = TC_CLSFLOWER_DESTROY;
215 offload.cookie = cookie;
217 tc.type = TC_SETUP_CLSFLOWER;
218 tc.cls_flower = &offload;
220 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, &tc);
223 static int fl_hw_replace_filter(struct tcf_proto *tp,
224 struct flow_dissector *dissector,
225 struct fl_flow_key *mask,
226 struct fl_flow_key *key,
227 struct tcf_exts *actions,
228 unsigned long cookie, u32 flags)
230 struct net_device *dev = tp->q->dev_queue->dev;
231 struct tc_cls_flower_offload offload = {0};
232 struct tc_to_netdev tc;
235 if (!tc_should_offload(dev, tp, flags))
236 return tc_skip_sw(flags) ? -EINVAL : 0;
238 offload.command = TC_CLSFLOWER_REPLACE;
239 offload.cookie = cookie;
240 offload.dissector = dissector;
243 offload.exts = actions;
245 tc.type = TC_SETUP_CLSFLOWER;
246 tc.cls_flower = &offload;
248 err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol,
251 if (tc_skip_sw(flags))
257 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
259 struct net_device *dev = tp->q->dev_queue->dev;
260 struct tc_cls_flower_offload offload = {0};
261 struct tc_to_netdev tc;
263 if (!tc_should_offload(dev, tp, 0))
266 offload.command = TC_CLSFLOWER_STATS;
267 offload.cookie = (unsigned long)f;
268 offload.exts = &f->exts;
270 tc.type = TC_SETUP_CLSFLOWER;
271 tc.cls_flower = &offload;
273 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, &tc);
276 static void fl_destroy_sleepable(struct work_struct *work)
278 struct cls_fl_head *head = container_of(work, struct cls_fl_head,
280 if (head->mask_assigned)
281 rhashtable_destroy(&head->ht);
283 module_put(THIS_MODULE);
286 static void fl_destroy_rcu(struct rcu_head *rcu)
288 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
290 INIT_WORK(&head->work, fl_destroy_sleepable);
291 schedule_work(&head->work);
294 static bool fl_destroy(struct tcf_proto *tp, bool force)
296 struct cls_fl_head *head = rtnl_dereference(tp->root);
297 struct cls_fl_filter *f, *next;
299 if (!force && !list_empty(&head->filters))
302 list_for_each_entry_safe(f, next, &head->filters, list) {
303 fl_hw_destroy_filter(tp, (unsigned long)f);
304 list_del_rcu(&f->list);
305 call_rcu(&f->rcu, fl_destroy_filter);
308 __module_get(THIS_MODULE);
309 call_rcu(&head->rcu, fl_destroy_rcu);
313 static unsigned long fl_get(struct tcf_proto *tp, u32 handle)
315 struct cls_fl_head *head = rtnl_dereference(tp->root);
316 struct cls_fl_filter *f;
318 list_for_each_entry(f, &head->filters, list)
319 if (f->handle == handle)
320 return (unsigned long) f;
324 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
325 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
326 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
327 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
329 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
330 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
331 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
332 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
333 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
334 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
335 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
336 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
337 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
338 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
339 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
340 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
341 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
342 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
343 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
344 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
345 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
346 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
347 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
348 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
349 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
350 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
351 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
352 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
353 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
354 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
355 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
356 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
357 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
358 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
359 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
360 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
361 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
362 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
365 static void fl_set_key_val(struct nlattr **tb,
366 void *val, int val_type,
367 void *mask, int mask_type, int len)
371 memcpy(val, nla_data(tb[val_type]), len);
372 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
373 memset(mask, 0xff, len);
375 memcpy(mask, nla_data(tb[mask_type]), len);
378 static void fl_set_key_vlan(struct nlattr **tb,
379 struct flow_dissector_key_vlan *key_val,
380 struct flow_dissector_key_vlan *key_mask)
382 #define VLAN_PRIORITY_MASK 0x7
384 if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
386 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
387 key_mask->vlan_id = VLAN_VID_MASK;
389 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
390 key_val->vlan_priority =
391 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
393 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
397 static int fl_set_key(struct net *net, struct nlattr **tb,
398 struct fl_flow_key *key, struct fl_flow_key *mask)
401 #ifdef CONFIG_NET_CLS_IND
402 if (tb[TCA_FLOWER_INDEV]) {
403 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
406 key->indev_ifindex = err;
407 mask->indev_ifindex = 0xffffffff;
411 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
412 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
413 sizeof(key->eth.dst));
414 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
415 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
416 sizeof(key->eth.src));
418 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
419 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
421 if (ethertype == htons(ETH_P_8021Q)) {
422 fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
423 fl_set_key_val(tb, &key->basic.n_proto,
424 TCA_FLOWER_KEY_VLAN_ETH_TYPE,
425 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
426 sizeof(key->basic.n_proto));
428 key->basic.n_proto = ethertype;
429 mask->basic.n_proto = cpu_to_be16(~0);
433 if (key->basic.n_proto == htons(ETH_P_IP) ||
434 key->basic.n_proto == htons(ETH_P_IPV6)) {
435 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
436 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
437 sizeof(key->basic.ip_proto));
440 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
441 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
442 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
443 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
444 sizeof(key->ipv4.src));
445 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
446 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
447 sizeof(key->ipv4.dst));
448 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
449 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
450 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
451 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
452 sizeof(key->ipv6.src));
453 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
454 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
455 sizeof(key->ipv6.dst));
458 if (key->basic.ip_proto == IPPROTO_TCP) {
459 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
460 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
461 sizeof(key->tp.src));
462 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
463 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
464 sizeof(key->tp.dst));
465 } else if (key->basic.ip_proto == IPPROTO_UDP) {
466 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
467 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
468 sizeof(key->tp.src));
469 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
470 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
471 sizeof(key->tp.dst));
474 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
475 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
476 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
477 fl_set_key_val(tb, &key->enc_ipv4.src,
478 TCA_FLOWER_KEY_ENC_IPV4_SRC,
480 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
481 sizeof(key->enc_ipv4.src));
482 fl_set_key_val(tb, &key->enc_ipv4.dst,
483 TCA_FLOWER_KEY_ENC_IPV4_DST,
485 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
486 sizeof(key->enc_ipv4.dst));
489 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
490 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
491 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
492 fl_set_key_val(tb, &key->enc_ipv6.src,
493 TCA_FLOWER_KEY_ENC_IPV6_SRC,
495 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
496 sizeof(key->enc_ipv6.src));
497 fl_set_key_val(tb, &key->enc_ipv6.dst,
498 TCA_FLOWER_KEY_ENC_IPV6_DST,
500 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
501 sizeof(key->enc_ipv6.dst));
504 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
505 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
506 sizeof(key->enc_key_id.keyid));
511 static bool fl_mask_eq(struct fl_flow_mask *mask1,
512 struct fl_flow_mask *mask2)
514 const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
515 const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
517 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
518 !memcmp(lmask1, lmask2, fl_mask_range(mask1));
521 static const struct rhashtable_params fl_ht_params = {
522 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
523 .head_offset = offsetof(struct cls_fl_filter, ht_node),
524 .automatic_shrinking = true,
527 static int fl_init_hashtable(struct cls_fl_head *head,
528 struct fl_flow_mask *mask)
530 head->ht_params = fl_ht_params;
531 head->ht_params.key_len = fl_mask_range(mask);
532 head->ht_params.key_offset += mask->range.start;
534 return rhashtable_init(&head->ht, &head->ht_params);
537 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
538 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
540 #define FL_KEY_IS_MASKED(mask, member) \
541 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
542 0, FL_KEY_MEMBER_SIZE(member)) \
544 #define FL_KEY_SET(keys, cnt, id, member) \
546 keys[cnt].key_id = id; \
547 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
551 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
553 if (FL_KEY_IS_MASKED(mask, member)) \
554 FL_KEY_SET(keys, cnt, id, member); \
557 static void fl_init_dissector(struct cls_fl_head *head,
558 struct fl_flow_mask *mask)
560 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
563 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
564 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
565 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
566 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
567 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
568 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
569 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
570 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
571 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
572 FLOW_DISSECTOR_KEY_PORTS, tp);
573 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
574 FLOW_DISSECTOR_KEY_VLAN, vlan);
576 skb_flow_dissector_init(&head->dissector, keys, cnt);
579 static int fl_check_assign_mask(struct cls_fl_head *head,
580 struct fl_flow_mask *mask)
584 if (head->mask_assigned) {
585 if (!fl_mask_eq(&head->mask, mask))
591 /* Mask is not assigned yet. So assign it and init hashtable
594 err = fl_init_hashtable(head, mask);
597 memcpy(&head->mask, mask, sizeof(head->mask));
598 head->mask_assigned = true;
600 fl_init_dissector(head, mask);
605 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
606 struct cls_fl_filter *f, struct fl_flow_mask *mask,
607 unsigned long base, struct nlattr **tb,
608 struct nlattr *est, bool ovr)
613 err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0);
616 err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
620 if (tb[TCA_FLOWER_CLASSID]) {
621 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
622 tcf_bind_filter(tp, &f->res, base);
625 err = fl_set_key(net, tb, &f->key, &mask->key);
629 fl_mask_update_range(mask);
630 fl_set_masked_key(&f->mkey, &f->key, mask);
632 tcf_exts_change(tp, &f->exts, &e);
636 tcf_exts_destroy(&e);
640 static u32 fl_grab_new_handle(struct tcf_proto *tp,
641 struct cls_fl_head *head)
643 unsigned int i = 0x80000000;
647 if (++head->hgen == 0x7FFFFFFF)
649 } while (--i > 0 && fl_get(tp, head->hgen));
651 if (unlikely(i == 0)) {
652 pr_err("Insufficient number of handles\n");
661 static int fl_change(struct net *net, struct sk_buff *in_skb,
662 struct tcf_proto *tp, unsigned long base,
663 u32 handle, struct nlattr **tca,
664 unsigned long *arg, bool ovr)
666 struct cls_fl_head *head = rtnl_dereference(tp->root);
667 struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg;
668 struct cls_fl_filter *fnew;
669 struct nlattr *tb[TCA_FLOWER_MAX + 1];
670 struct fl_flow_mask mask = {};
673 if (!tca[TCA_OPTIONS])
676 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], fl_policy);
680 if (fold && handle && fold->handle != handle)
683 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
687 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
692 handle = fl_grab_new_handle(tp, head);
698 fnew->handle = handle;
700 if (tb[TCA_FLOWER_FLAGS]) {
701 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
703 if (!tc_flags_valid(fnew->flags)) {
709 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
713 err = fl_check_assign_mask(head, &mask);
717 if (!tc_skip_sw(fnew->flags)) {
718 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
724 err = fl_hw_replace_filter(tp,
735 if (!tc_skip_sw(fold->flags))
736 rhashtable_remove_fast(&head->ht, &fold->ht_node,
738 fl_hw_destroy_filter(tp, (unsigned long)fold);
741 *arg = (unsigned long) fnew;
744 list_replace_rcu(&fold->list, &fnew->list);
745 tcf_unbind_filter(tp, &fold->res);
746 call_rcu(&fold->rcu, fl_destroy_filter);
748 list_add_tail_rcu(&fnew->list, &head->filters);
754 tcf_exts_destroy(&fnew->exts);
759 static int fl_delete(struct tcf_proto *tp, unsigned long arg)
761 struct cls_fl_head *head = rtnl_dereference(tp->root);
762 struct cls_fl_filter *f = (struct cls_fl_filter *) arg;
764 if (!tc_skip_sw(f->flags))
765 rhashtable_remove_fast(&head->ht, &f->ht_node,
767 list_del_rcu(&f->list);
768 fl_hw_destroy_filter(tp, (unsigned long)f);
769 tcf_unbind_filter(tp, &f->res);
770 call_rcu(&f->rcu, fl_destroy_filter);
774 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
776 struct cls_fl_head *head = rtnl_dereference(tp->root);
777 struct cls_fl_filter *f;
779 list_for_each_entry_rcu(f, &head->filters, list) {
780 if (arg->count < arg->skip)
782 if (arg->fn(tp, (unsigned long) f, arg) < 0) {
791 static int fl_dump_key_val(struct sk_buff *skb,
792 void *val, int val_type,
793 void *mask, int mask_type, int len)
797 if (!memchr_inv(mask, 0, len))
799 err = nla_put(skb, val_type, len, val);
802 if (mask_type != TCA_FLOWER_UNSPEC) {
803 err = nla_put(skb, mask_type, len, mask);
810 static int fl_dump_key_vlan(struct sk_buff *skb,
811 struct flow_dissector_key_vlan *vlan_key,
812 struct flow_dissector_key_vlan *vlan_mask)
816 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
818 if (vlan_mask->vlan_id) {
819 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
824 if (vlan_mask->vlan_priority) {
825 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
826 vlan_key->vlan_priority);
833 static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
834 struct sk_buff *skb, struct tcmsg *t)
836 struct cls_fl_head *head = rtnl_dereference(tp->root);
837 struct cls_fl_filter *f = (struct cls_fl_filter *) fh;
839 struct fl_flow_key *key, *mask;
844 t->tcm_handle = f->handle;
846 nest = nla_nest_start(skb, TCA_OPTIONS);
848 goto nla_put_failure;
850 if (f->res.classid &&
851 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
852 goto nla_put_failure;
855 mask = &head->mask.key;
857 if (mask->indev_ifindex) {
858 struct net_device *dev;
860 dev = __dev_get_by_index(net, key->indev_ifindex);
861 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
862 goto nla_put_failure;
865 fl_hw_update_stats(tp, f);
867 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
868 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
869 sizeof(key->eth.dst)) ||
870 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
871 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
872 sizeof(key->eth.src)) ||
873 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
874 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
875 sizeof(key->basic.n_proto)))
876 goto nla_put_failure;
878 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
879 goto nla_put_failure;
881 if ((key->basic.n_proto == htons(ETH_P_IP) ||
882 key->basic.n_proto == htons(ETH_P_IPV6)) &&
883 fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
884 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
885 sizeof(key->basic.ip_proto)))
886 goto nla_put_failure;
888 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
889 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
890 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
891 sizeof(key->ipv4.src)) ||
892 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
893 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
894 sizeof(key->ipv4.dst))))
895 goto nla_put_failure;
896 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
897 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
898 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
899 sizeof(key->ipv6.src)) ||
900 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
901 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
902 sizeof(key->ipv6.dst))))
903 goto nla_put_failure;
905 if (key->basic.ip_proto == IPPROTO_TCP &&
906 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
907 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
908 sizeof(key->tp.src)) ||
909 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
910 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
911 sizeof(key->tp.dst))))
912 goto nla_put_failure;
913 else if (key->basic.ip_proto == IPPROTO_UDP &&
914 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
915 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
916 sizeof(key->tp.src)) ||
917 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
918 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
919 sizeof(key->tp.dst))))
920 goto nla_put_failure;
922 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
923 (fl_dump_key_val(skb, &key->enc_ipv4.src,
924 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
925 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
926 sizeof(key->enc_ipv4.src)) ||
927 fl_dump_key_val(skb, &key->enc_ipv4.dst,
928 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
929 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
930 sizeof(key->enc_ipv4.dst))))
931 goto nla_put_failure;
932 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
933 (fl_dump_key_val(skb, &key->enc_ipv6.src,
934 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
935 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
936 sizeof(key->enc_ipv6.src)) ||
937 fl_dump_key_val(skb, &key->enc_ipv6.dst,
938 TCA_FLOWER_KEY_ENC_IPV6_DST,
940 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
941 sizeof(key->enc_ipv6.dst))))
942 goto nla_put_failure;
944 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
945 &mask->enc_key_id, TCA_FLOWER_UNSPEC,
946 sizeof(key->enc_key_id)))
947 goto nla_put_failure;
949 nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags);
951 if (tcf_exts_dump(skb, &f->exts))
952 goto nla_put_failure;
954 nla_nest_end(skb, nest);
956 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
957 goto nla_put_failure;
962 nla_nest_cancel(skb, nest);
966 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
968 .classify = fl_classify,
970 .destroy = fl_destroy,
976 .owner = THIS_MODULE,
979 static int __init cls_fl_init(void)
981 return register_tcf_proto_ops(&cls_fl_ops);
984 static void __exit cls_fl_exit(void)
986 unregister_tcf_proto_ops(&cls_fl_ops);
989 module_init(cls_fl_init);
990 module_exit(cls_fl_exit);
992 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
993 MODULE_DESCRIPTION("Flower classifier");
994 MODULE_LICENSE("GPL v2");