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net: sched: cls: add extack support for change callback
[linux-2.6-block.git] / net / sched / cls_flower.c
CommitLineData
77b9900e
JP		 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>
d9363774 16#include <linux/workqueue.h>
77b9900e
JP		 17
18#include <linux/if_ether.h>
19#include <linux/in6.h>
20#include <linux/ip.h>
a577d8f7 21#include <linux/mpls.h>
77b9900e
JP		 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
bc3103f1
AV		 28#include <net/dst.h>
29#include <net/dst_metadata.h>
30
77b9900e
JP		 31struct fl_flow_key {
32 int indev_ifindex;
42aecaa9 33 struct flow_dissector_key_control control;
bc3103f1 34 struct flow_dissector_key_control enc_control;
77b9900e
JP		 35 struct flow_dissector_key_basic basic;
36 struct flow_dissector_key_eth_addrs eth;
9399ae9a 37 struct flow_dissector_key_vlan vlan;
77b9900e 38 union {
c3f83241 39 struct flow_dissector_key_ipv4_addrs ipv4;
77b9900e
JP		 40 struct flow_dissector_key_ipv6_addrs ipv6;
41 };
42 struct flow_dissector_key_ports tp;
7b684884 43 struct flow_dissector_key_icmp icmp;
99d31326 44 struct flow_dissector_key_arp arp;
bc3103f1
AV		 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 };
f4d997fd 50 struct flow_dissector_key_ports enc_tp;
a577d8f7 51 struct flow_dissector_key_mpls mpls;
fdfc7dd6 52 struct flow_dissector_key_tcp tcp;
4d80cc0a 53 struct flow_dissector_key_ip ip;
77b9900e
JP		 54} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
55
56struct fl_flow_mask_range {
57 unsigned short int start;
58 unsigned short int end;
59};
60
61struct fl_flow_mask {
62 struct fl_flow_key key;
63 struct fl_flow_mask_range range;
64 struct rcu_head rcu;
65};
66
67struct cls_fl_head {
68 struct rhashtable ht;
69 struct fl_flow_mask mask;
70 struct flow_dissector dissector;
77b9900e
JP		 71 bool mask_assigned;
72 struct list_head filters;
73 struct rhashtable_params ht_params;
d9363774
DB		 74 union {
75 struct work_struct work;
76 struct rcu_head rcu;
77 };
c15ab236 78 struct idr handle_idr;
77b9900e
JP		 79};
80
81struct 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;
e69985c6 89 u32 flags;
0552c8af
CW		 90 union {
91 struct work_struct work;
92 struct rcu_head rcu;
93 };
7091d8c7 94 struct net_device *hw_dev;
77b9900e
JP		 95};
96
97static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
98{
99 return mask->range.end - mask->range.start;
100}
101
102static 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
119static 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
125static 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
137static 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
a3308d8f
PB		 143static 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
77b9900e
JP		 151static 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
e69985c6
AV		 159 if (!atomic_read(&head->ht.nelems))
160 return -1;
161
77b9900e 162 fl_clear_masked_range(&skb_key, &head->mask);
bc3103f1 163
77b9900e
JP		 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.
167 */
168 skb_key.basic.n_proto = skb->protocol;
62b32379 169 skb_flow_dissect_tunnel_info(skb, &head->dissector, &skb_key);
cd79a238 170 skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
77b9900e
JP		 171
172 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
173
a3308d8f 174 f = fl_lookup(head, &skb_mkey);
e8eb36cd 175 if (f && !tc_skip_sw(f->flags)) {
77b9900e
JP		 176 *res = f->res;
177 return tcf_exts_exec(skb, &f->exts, res);
178 }
179 return -1;
180}
181
182static int fl_init(struct tcf_proto *tp)
183{
184 struct cls_fl_head *head;
185
186 head = kzalloc(sizeof(*head), GFP_KERNEL);
187 if (!head)
188 return -ENOBUFS;
189
190 INIT_LIST_HEAD_RCU(&head->filters);
191 rcu_assign_pointer(tp->root, head);
c15ab236 192 idr_init(&head->handle_idr);
77b9900e
JP		 193
194 return 0;
195}
196
0dadc117
CW		 197static void __fl_destroy_filter(struct cls_fl_filter *f)
198{
199 tcf_exts_destroy(&f->exts);
200 tcf_exts_put_net(&f->exts);
201 kfree(f);
202}
203
0552c8af 204static void fl_destroy_filter_work(struct work_struct *work)
77b9900e 205{
0552c8af 206 struct cls_fl_filter *f = container_of(work, struct cls_fl_filter, work);
77b9900e 207
0552c8af 208 rtnl_lock();
0dadc117 209 __fl_destroy_filter(f);
0552c8af
CW		 210 rtnl_unlock();
211}
212
213static void fl_destroy_filter(struct rcu_head *head)
214{
215 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
216
217 INIT_WORK(&f->work, fl_destroy_filter_work);
218 tcf_queue_work(&f->work);
77b9900e
JP		 219}
220
3036dab6 221static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f)
5b33f488 222{
de4784ca 223 struct tc_cls_flower_offload cls_flower = {};
208c0f4b 224 struct tcf_block *block = tp->chain->block;
5b33f488 225
de4784ca
JP		 226 tc_cls_common_offload_init(&cls_flower.common, tp);
227 cls_flower.command = TC_CLSFLOWER_DESTROY;
228 cls_flower.cookie = (unsigned long) f;
5b33f488 229
208c0f4b 230 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
717503b9 231 &cls_flower, false);
caa72601 232 tcf_block_offload_dec(block, &f->flags);
5b33f488
AV		 233}
234
e8eb36cd
AV		 235static int fl_hw_replace_filter(struct tcf_proto *tp,
236 struct flow_dissector *dissector,
237 struct fl_flow_key *mask,
3036dab6 238 struct cls_fl_filter *f)
5b33f488 239{
de4784ca 240 struct tc_cls_flower_offload cls_flower = {};
208c0f4b 241 struct tcf_block *block = tp->chain->block;
717503b9 242 bool skip_sw = tc_skip_sw(f->flags);
e8eb36cd 243 int err;
5b33f488 244
de4784ca
JP		 245 tc_cls_common_offload_init(&cls_flower.common, tp);
246 cls_flower.command = TC_CLSFLOWER_REPLACE;
247 cls_flower.cookie = (unsigned long) f;
248 cls_flower.dissector = dissector;
249 cls_flower.mask = mask;
250 cls_flower.key = &f->mkey;
251 cls_flower.exts = &f->exts;
384c181e 252 cls_flower.classid = f->res.classid;
5b33f488 253
208c0f4b 254 err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
717503b9
JP		 255 &cls_flower, skip_sw);
256 if (err < 0) {
257 fl_hw_destroy_filter(tp, f);
e8eb36cd 258 return err;
717503b9 259 } else if (err > 0) {
caa72601 260 tcf_block_offload_inc(block, &f->flags);
717503b9
JP		 261 }
262
263 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
264 return -EINVAL;
265
e8eb36cd 266 return 0;
5b33f488
AV		 267}
268
10cbc684
AV		 269static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
270{
de4784ca 271 struct tc_cls_flower_offload cls_flower = {};
208c0f4b 272 struct tcf_block *block = tp->chain->block;
10cbc684 273
de4784ca
JP		 274 tc_cls_common_offload_init(&cls_flower.common, tp);
275 cls_flower.command = TC_CLSFLOWER_STATS;
276 cls_flower.cookie = (unsigned long) f;
277 cls_flower.exts = &f->exts;
384c181e 278 cls_flower.classid = f->res.classid;
10cbc684 279
208c0f4b 280 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
717503b9 281 &cls_flower, false);
10cbc684
AV		 282}
283
13fa876e
RD		 284static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
285{
c15ab236
CM		 286 struct cls_fl_head *head = rtnl_dereference(tp->root);
287
288 idr_remove_ext(&head->handle_idr, f->handle);
13fa876e 289 list_del_rcu(&f->list);
79685219 290 if (!tc_skip_hw(f->flags))
3036dab6 291 fl_hw_destroy_filter(tp, f);
13fa876e 292 tcf_unbind_filter(tp, &f->res);
0dadc117
CW		 293 if (tcf_exts_get_net(&f->exts))
294 call_rcu(&f->rcu, fl_destroy_filter);
295 else
296 __fl_destroy_filter(f);
13fa876e
RD		 297}
298
d9363774
DB		 299static void fl_destroy_sleepable(struct work_struct *work)
300{
301 struct cls_fl_head *head = container_of(work, struct cls_fl_head,
302 work);
303 if (head->mask_assigned)
304 rhashtable_destroy(&head->ht);
305 kfree(head);
306 module_put(THIS_MODULE);
307}
308
309static void fl_destroy_rcu(struct rcu_head *rcu)
310{
311 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
312
313 INIT_WORK(&head->work, fl_destroy_sleepable);
314 schedule_work(&head->work);
315}
316
763dbf63 317static void fl_destroy(struct tcf_proto *tp)
77b9900e
JP		 318{
319 struct cls_fl_head *head = rtnl_dereference(tp->root);
320 struct cls_fl_filter *f, *next;
321
13fa876e
RD		 322 list_for_each_entry_safe(f, next, &head->filters, list)
323 __fl_delete(tp, f);
c15ab236 324 idr_destroy(&head->handle_idr);
d9363774
DB		 325
326 __module_get(THIS_MODULE);
327 call_rcu(&head->rcu, fl_destroy_rcu);
77b9900e
JP		 328}
329
8113c095 330static void *fl_get(struct tcf_proto *tp, u32 handle)
77b9900e
JP		 331{
332 struct cls_fl_head *head = rtnl_dereference(tp->root);
77b9900e 333
c15ab236 334 return idr_find_ext(&head->handle_idr, handle);
77b9900e
JP		 335}
336
337static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
338 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
339 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
340 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
341 .len = IFNAMSIZ },
342 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
343 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
344 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
345 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
346 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
347 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
348 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
349 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
350 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
351 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
352 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
353 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
354 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
355 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
356 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
357 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
b175c3a4
JHS		 358 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
359 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
9399ae9a
HHZ		 360 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
361 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
362 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
bc3103f1
AV		 363 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
364 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
365 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
366 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
367 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
368 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
369 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
370 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
371 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
aa72d708
OG		 372 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
373 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
374 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
375 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
5976c5f4
SH		 376 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 },
377 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 },
378 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 },
379 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 },
f4d997fd
HHZ		 380 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 },
381 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 },
382 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 },
383 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 },
faa3ffce
OG		 384 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 },
385 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 },
7b684884
SH		 386 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 },
387 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
388 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 },
389 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
390 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 },
391 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
392 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 },
393 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
99d31326
SH		 394 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 },
395 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 },
396 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 },
397 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 },
398 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 },
399 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 },
400 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN },
401 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN },
402 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN },
403 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN },
a577d8f7
BL		 404 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 },
405 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 },
406 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 },
407 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 },
fdfc7dd6
JP		 408 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 },
409 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
4d80cc0a
OG		 410 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 },
411 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 },
412 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 },
413 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 },
77b9900e
JP		 414};
415
416static void fl_set_key_val(struct nlattr **tb,
417 void *val, int val_type,
418 void *mask, int mask_type, int len)
419{
420 if (!tb[val_type])
421 return;
422 memcpy(val, nla_data(tb[val_type]), len);
423 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
424 memset(mask, 0xff, len);
425 else
426 memcpy(mask, nla_data(tb[mask_type]), len);
427}
428
1a7fca63
BL		 429static int fl_set_key_mpls(struct nlattr **tb,
430 struct flow_dissector_key_mpls *key_val,
431 struct flow_dissector_key_mpls *key_mask)
a577d8f7
BL		 432{
433 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
434 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
435 key_mask->mpls_ttl = MPLS_TTL_MASK;
436 }
437 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
1a7fca63
BL		 438 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
439
440 if (bos & ~MPLS_BOS_MASK)
441 return -EINVAL;
442 key_val->mpls_bos = bos;
a577d8f7
BL		 443 key_mask->mpls_bos = MPLS_BOS_MASK;
444 }
445 if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
1a7fca63
BL		 446 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
447
448 if (tc & ~MPLS_TC_MASK)
449 return -EINVAL;
450 key_val->mpls_tc = tc;
a577d8f7
BL		 451 key_mask->mpls_tc = MPLS_TC_MASK;
452 }
453 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
1a7fca63
BL		 454 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
455
456 if (label & ~MPLS_LABEL_MASK)
457 return -EINVAL;
458 key_val->mpls_label = label;
a577d8f7
BL		 459 key_mask->mpls_label = MPLS_LABEL_MASK;
460 }
1a7fca63 461 return 0;
a577d8f7
BL		 462}
463
9399ae9a
HHZ		 464static void fl_set_key_vlan(struct nlattr **tb,
465 struct flow_dissector_key_vlan *key_val,
466 struct flow_dissector_key_vlan *key_mask)
467{
468#define VLAN_PRIORITY_MASK 0x7
469
470 if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
471 key_val->vlan_id =
472 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
473 key_mask->vlan_id = VLAN_VID_MASK;
474 }
475 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
476 key_val->vlan_priority =
477 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
478 VLAN_PRIORITY_MASK;
479 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
480 }
481}
482
faa3ffce
OG		 483static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
484 u32 *dissector_key, u32 *dissector_mask,
485 u32 flower_flag_bit, u32 dissector_flag_bit)
486{
487 if (flower_mask & flower_flag_bit) {
488 *dissector_mask |= dissector_flag_bit;
489 if (flower_key & flower_flag_bit)
490 *dissector_key |= dissector_flag_bit;
491 }
492}
493
d9724772
OG		 494static int fl_set_key_flags(struct nlattr **tb,
495 u32 *flags_key, u32 *flags_mask)
faa3ffce
OG		 496{
497 u32 key, mask;
498
d9724772
OG		 499 /* mask is mandatory for flags */
500 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
501 return -EINVAL;
faa3ffce
OG		 502
503 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
d9724772 504 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
faa3ffce
OG		 505
506 *flags_key = 0;
507 *flags_mask = 0;
508
509 fl_set_key_flag(key, mask, flags_key, flags_mask,
510 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
d9724772
OG		 511
512 return 0;
faa3ffce
OG		 513}
514
4d80cc0a
OG		 515static void fl_set_key_ip(struct nlattr **tb,
516 struct flow_dissector_key_ip *key,
517 struct flow_dissector_key_ip *mask)
518{
519 fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS,
520 &mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK,
521 sizeof(key->tos));
522
523 fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL,
524 &mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK,
525 sizeof(key->ttl));
526}
527
77b9900e
JP		 528static int fl_set_key(struct net *net, struct nlattr **tb,
529 struct fl_flow_key *key, struct fl_flow_key *mask)
530{
9399ae9a 531 __be16 ethertype;
d9724772 532 int ret = 0;
dd3aa3b5 533#ifdef CONFIG_NET_CLS_IND
77b9900e 534 if (tb[TCA_FLOWER_INDEV]) {
dd3aa3b5 535 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
77b9900e
JP		 536 if (err < 0)
537 return err;
538 key->indev_ifindex = err;
539 mask->indev_ifindex = 0xffffffff;
540 }
dd3aa3b5 541#endif
77b9900e
JP		 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));
66530bdf 549
0b498a52 550 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
9399ae9a
HHZ		 551 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
552
0b498a52
AB		 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 }
9399ae9a 563 }
66530bdf 564
77b9900e
JP		 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));
4d80cc0a 570 fl_set_key_ip(tb, &key->ip, &mask->ip);
77b9900e 571 }
66530bdf
JHS		 572
573 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
574 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
970bfcd0 575 mask->control.addr_type = ~0;
77b9900e
JP		 576 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
577 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
578 sizeof(key->ipv4.src));
579 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
580 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
581 sizeof(key->ipv4.dst));
66530bdf
JHS		 582 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
583 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
970bfcd0 584 mask->control.addr_type = ~0;
77b9900e
JP		 585 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
586 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
587 sizeof(key->ipv6.src));
588 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
589 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
590 sizeof(key->ipv6.dst));
591 }
66530bdf 592
77b9900e
JP		 593 if (key->basic.ip_proto == IPPROTO_TCP) {
594 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
aa72d708 595 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
77b9900e
JP		 596 sizeof(key->tp.src));
597 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
aa72d708 598 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
77b9900e 599 sizeof(key->tp.dst));
fdfc7dd6
JP		 600 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
601 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
602 sizeof(key->tcp.flags));
77b9900e
JP		 603 } else if (key->basic.ip_proto == IPPROTO_UDP) {
604 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
aa72d708 605 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
77b9900e
JP		 606 sizeof(key->tp.src));
607 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
aa72d708 608 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
77b9900e 609 sizeof(key->tp.dst));
5976c5f4
SH		 610 } else if (key->basic.ip_proto == IPPROTO_SCTP) {
611 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
612 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
613 sizeof(key->tp.src));
614 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
615 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
616 sizeof(key->tp.dst));
7b684884
SH		 617 } else if (key->basic.n_proto == htons(ETH_P_IP) &&
618 key->basic.ip_proto == IPPROTO_ICMP) {
619 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
620 &mask->icmp.type,
621 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
622 sizeof(key->icmp.type));
623 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
624 &mask->icmp.code,
625 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
626 sizeof(key->icmp.code));
627 } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
628 key->basic.ip_proto == IPPROTO_ICMPV6) {
629 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
630 &mask->icmp.type,
631 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
632 sizeof(key->icmp.type));
040587af 633 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
7b684884 634 &mask->icmp.code,
040587af 635 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
7b684884 636 sizeof(key->icmp.code));
a577d8f7
BL		 637 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
638 key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
1a7fca63
BL		 639 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
640 if (ret)
641 return ret;
99d31326
SH		 642 } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
643 key->basic.n_proto == htons(ETH_P_RARP)) {
644 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
645 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
646 sizeof(key->arp.sip));
647 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
648 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
649 sizeof(key->arp.tip));
650 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
651 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
652 sizeof(key->arp.op));
653 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
654 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
655 sizeof(key->arp.sha));
656 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
657 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
658 sizeof(key->arp.tha));
77b9900e
JP		 659 }
660
bc3103f1
AV		 661 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
662 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
663 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
970bfcd0 664 mask->enc_control.addr_type = ~0;
bc3103f1
AV		 665 fl_set_key_val(tb, &key->enc_ipv4.src,
666 TCA_FLOWER_KEY_ENC_IPV4_SRC,
667 &mask->enc_ipv4.src,
668 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
669 sizeof(key->enc_ipv4.src));
670 fl_set_key_val(tb, &key->enc_ipv4.dst,
671 TCA_FLOWER_KEY_ENC_IPV4_DST,
672 &mask->enc_ipv4.dst,
673 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
674 sizeof(key->enc_ipv4.dst));
675 }
676
677 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
678 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
679 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
970bfcd0 680 mask->enc_control.addr_type = ~0;
bc3103f1
AV		 681 fl_set_key_val(tb, &key->enc_ipv6.src,
682 TCA_FLOWER_KEY_ENC_IPV6_SRC,
683 &mask->enc_ipv6.src,
684 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
685 sizeof(key->enc_ipv6.src));
686 fl_set_key_val(tb, &key->enc_ipv6.dst,
687 TCA_FLOWER_KEY_ENC_IPV6_DST,
688 &mask->enc_ipv6.dst,
689 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
690 sizeof(key->enc_ipv6.dst));
691 }
692
693 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
eb523f42 694 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
bc3103f1
AV		 695 sizeof(key->enc_key_id.keyid));
696
f4d997fd
HHZ		 697 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
698 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
699 sizeof(key->enc_tp.src));
700
701 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
702 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
703 sizeof(key->enc_tp.dst));
704
d9724772
OG		 705 if (tb[TCA_FLOWER_KEY_FLAGS])
706 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
faa3ffce 707
d9724772 708 return ret;
77b9900e
JP		 709}
710
711static bool fl_mask_eq(struct fl_flow_mask *mask1,
712 struct fl_flow_mask *mask2)
713{
714 const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
715 const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
716
717 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
718 !memcmp(lmask1, lmask2, fl_mask_range(mask1));
719}
720
721static const struct rhashtable_params fl_ht_params = {
722 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
723 .head_offset = offsetof(struct cls_fl_filter, ht_node),
724 .automatic_shrinking = true,
725};
726
727static int fl_init_hashtable(struct cls_fl_head *head,
728 struct fl_flow_mask *mask)
729{
730 head->ht_params = fl_ht_params;
731 head->ht_params.key_len = fl_mask_range(mask);
732 head->ht_params.key_offset += mask->range.start;
733
734 return rhashtable_init(&head->ht, &head->ht_params);
735}
736
737#define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
738#define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
77b9900e 739
339ba878
HHZ		 740#define FL_KEY_IS_MASKED(mask, member) \
741 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
742 0, FL_KEY_MEMBER_SIZE(member)) \
77b9900e
JP		 743
744#define FL_KEY_SET(keys, cnt, id, member) \
745 do { \
746 keys[cnt].key_id = id; \
747 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
748 cnt++; \
749 } while(0);
750
339ba878 751#define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
77b9900e 752 do { \
339ba878 753 if (FL_KEY_IS_MASKED(mask, member)) \
77b9900e
JP		 754 FL_KEY_SET(keys, cnt, id, member); \
755 } while(0);
756
757static void fl_init_dissector(struct cls_fl_head *head,
758 struct fl_flow_mask *mask)
759{
760 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
761 size_t cnt = 0;
762
42aecaa9 763 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
77b9900e 764 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
339ba878
HHZ		 765 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
766 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
767 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
768 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
769 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
770 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
771 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
772 FLOW_DISSECTOR_KEY_PORTS, tp);
4d80cc0a
OG		 773 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
774 FLOW_DISSECTOR_KEY_IP, ip);
fdfc7dd6
JP		 775 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
776 FLOW_DISSECTOR_KEY_TCP, tcp);
7b684884
SH		 777 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
778 FLOW_DISSECTOR_KEY_ICMP, icmp);
99d31326
SH		 779 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
780 FLOW_DISSECTOR_KEY_ARP, arp);
a577d8f7
BL		 781 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
782 FLOW_DISSECTOR_KEY_MPLS, mpls);
9399ae9a
HHZ		 783 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
784 FLOW_DISSECTOR_KEY_VLAN, vlan);
519d1052
HHZ		 785 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
786 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
787 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
788 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
789 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
790 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
791 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
792 FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
793 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
794 enc_control);
f4d997fd
HHZ		 795 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
796 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
77b9900e
JP		 797
798 skb_flow_dissector_init(&head->dissector, keys, cnt);
799}
800
801static int fl_check_assign_mask(struct cls_fl_head *head,
802 struct fl_flow_mask *mask)
803{
804 int err;
805
806 if (head->mask_assigned) {
807 if (!fl_mask_eq(&head->mask, mask))
808 return -EINVAL;
809 else
810 return 0;
811 }
812
813 /* Mask is not assigned yet. So assign it and init hashtable
814 * according to that.
815 */
816 err = fl_init_hashtable(head, mask);
817 if (err)
818 return err;
819 memcpy(&head->mask, mask, sizeof(head->mask));
820 head->mask_assigned = true;
821
822 fl_init_dissector(head, mask);
823
824 return 0;
825}
826
827static int fl_set_parms(struct net *net, struct tcf_proto *tp,
828 struct cls_fl_filter *f, struct fl_flow_mask *mask,
829 unsigned long base, struct nlattr **tb,
830 struct nlattr *est, bool ovr)
831{
77b9900e
JP		 832 int err;
833
45507529 834 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr);
77b9900e
JP		 835 if (err < 0)
836 return err;
837
838 if (tb[TCA_FLOWER_CLASSID]) {
839 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
840 tcf_bind_filter(tp, &f->res, base);
841 }
842
843 err = fl_set_key(net, tb, &f->key, &mask->key);
844 if (err)
45507529 845 return err;
77b9900e
JP		 846
847 fl_mask_update_range(mask);
848 fl_set_masked_key(&f->mkey, &f->key, mask);
849
77b9900e 850 return 0;
77b9900e
JP		 851}
852
77b9900e
JP		 853static int fl_change(struct net *net, struct sk_buff *in_skb,
854 struct tcf_proto *tp, unsigned long base,
855 u32 handle, struct nlattr **tca,
7306db38 856 void **arg, bool ovr, struct netlink_ext_ack *extack)
77b9900e
JP		 857{
858 struct cls_fl_head *head = rtnl_dereference(tp->root);
8113c095 859 struct cls_fl_filter *fold = *arg;
77b9900e 860 struct cls_fl_filter *fnew;
39b7b6a6 861 struct nlattr **tb;
77b9900e 862 struct fl_flow_mask mask = {};
c15ab236 863 unsigned long idr_index;
77b9900e
JP		 864 int err;
865
866 if (!tca[TCA_OPTIONS])
867 return -EINVAL;
868
39b7b6a6
AB		 869 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
870 if (!tb)
871 return -ENOBUFS;
872
fceb6435
JB		 873 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
874 fl_policy, NULL);
77b9900e 875 if (err < 0)
39b7b6a6 876 goto errout_tb;
77b9900e 877
39b7b6a6
AB		 878 if (fold && handle && fold->handle != handle) {
879 err = -EINVAL;
880 goto errout_tb;
881 }
77b9900e
JP		 882
883 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
39b7b6a6
AB		 884 if (!fnew) {
885 err = -ENOBUFS;
886 goto errout_tb;
887 }
77b9900e 888
b9a24bb7
WC		 889 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
890 if (err < 0)
891 goto errout;
77b9900e
JP		 892
893 if (!handle) {
c15ab236
CM		 894 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index,
895 1, 0x80000000, GFP_KERNEL);
896 if (err)
77b9900e 897 goto errout;
c15ab236
CM		 898 fnew->handle = idr_index;
899 }
900
901 /* user specifies a handle and it doesn't exist */
902 if (handle && !fold) {
903 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index,
904 handle, handle + 1, GFP_KERNEL);
905 if (err)
906 goto errout;
907 fnew->handle = idr_index;
77b9900e 908 }
77b9900e 909
e69985c6
AV		 910 if (tb[TCA_FLOWER_FLAGS]) {
911 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
912
913 if (!tc_flags_valid(fnew->flags)) {
914 err = -EINVAL;
fe2502e4 915 goto errout_idr;
e69985c6
AV		 916 }
917 }
5b33f488 918
77b9900e
JP		 919 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
920 if (err)
fe2502e4 921 goto errout_idr;
77b9900e
JP		 922
923 err = fl_check_assign_mask(head, &mask);
924 if (err)
fe2502e4 925 goto errout_idr;
77b9900e 926
e8eb36cd 927 if (!tc_skip_sw(fnew->flags)) {
a3308d8f
PB		 928 if (!fold && fl_lookup(head, &fnew->mkey)) {
929 err = -EEXIST;
fe2502e4 930 goto errout_idr;
a3308d8f
PB		 931 }
932
e69985c6
AV		 933 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
934 head->ht_params);
935 if (err)
fe2502e4 936 goto errout_idr;
e69985c6 937 }
5b33f488 938
79685219
HHZ		 939 if (!tc_skip_hw(fnew->flags)) {
940 err = fl_hw_replace_filter(tp,
941 &head->dissector,
942 &mask.key,
3036dab6 943 fnew);
79685219 944 if (err)
fe2502e4 945 goto errout_idr;
79685219 946 }
5b33f488 947
55593960
OG		 948 if (!tc_in_hw(fnew->flags))
949 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
950
5b33f488 951 if (fold) {
725cbb62
JP		 952 if (!tc_skip_sw(fold->flags))
953 rhashtable_remove_fast(&head->ht, &fold->ht_node,
954 head->ht_params);
79685219 955 if (!tc_skip_hw(fold->flags))
3036dab6 956 fl_hw_destroy_filter(tp, fold);
5b33f488 957 }
77b9900e 958
8113c095 959 *arg = fnew;
77b9900e
JP		 960
961 if (fold) {
c15ab236
CM		 962 fnew->handle = handle;
963 idr_replace_ext(&head->handle_idr, fnew, fnew->handle);
ff3532f2 964 list_replace_rcu(&fold->list, &fnew->list);
77b9900e 965 tcf_unbind_filter(tp, &fold->res);
0dadc117 966 tcf_exts_get_net(&fold->exts);
77b9900e
JP		 967 call_rcu(&fold->rcu, fl_destroy_filter);
968 } else {
969 list_add_tail_rcu(&fnew->list, &head->filters);
970 }
971
39b7b6a6 972 kfree(tb);
77b9900e
JP		 973 return 0;
974
fe2502e4
CW		 975errout_idr:
976 if (fnew->handle)
977 idr_remove_ext(&head->handle_idr, fnew->handle);
77b9900e 978errout:
b9a24bb7 979 tcf_exts_destroy(&fnew->exts);
77b9900e 980 kfree(fnew);
39b7b6a6
AB		 981errout_tb:
982 kfree(tb);
77b9900e
JP		 983 return err;
984}
985
8113c095 986static int fl_delete(struct tcf_proto *tp, void *arg, bool *last)
77b9900e
JP		 987{
988 struct cls_fl_head *head = rtnl_dereference(tp->root);
8113c095 989 struct cls_fl_filter *f = arg;
77b9900e 990
725cbb62
JP		 991 if (!tc_skip_sw(f->flags))
992 rhashtable_remove_fast(&head->ht, &f->ht_node,
993 head->ht_params);
13fa876e 994 __fl_delete(tp, f);
763dbf63 995 *last = list_empty(&head->filters);
77b9900e
JP		 996 return 0;
997}
998
999static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
1000{
1001 struct cls_fl_head *head = rtnl_dereference(tp->root);
1002 struct cls_fl_filter *f;
1003
1004 list_for_each_entry_rcu(f, &head->filters, list) {
1005 if (arg->count < arg->skip)
1006 goto skip;
8113c095 1007 if (arg->fn(tp, f, arg) < 0) {
77b9900e
JP		 1008 arg->stop = 1;
1009 break;
1010 }
1011skip:
1012 arg->count++;
1013 }
1014}
1015
1016static int fl_dump_key_val(struct sk_buff *skb,
1017 void *val, int val_type,
1018 void *mask, int mask_type, int len)
1019{
1020 int err;
1021
1022 if (!memchr_inv(mask, 0, len))
1023 return 0;
1024 err = nla_put(skb, val_type, len, val);
1025 if (err)
1026 return err;
1027 if (mask_type != TCA_FLOWER_UNSPEC) {
1028 err = nla_put(skb, mask_type, len, mask);
1029 if (err)
1030 return err;
1031 }
1032 return 0;
1033}
1034
a577d8f7
BL		 1035static int fl_dump_key_mpls(struct sk_buff *skb,
1036 struct flow_dissector_key_mpls *mpls_key,
1037 struct flow_dissector_key_mpls *mpls_mask)
1038{
1039 int err;
1040
1041 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
1042 return 0;
1043 if (mpls_mask->mpls_ttl) {
1044 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
1045 mpls_key->mpls_ttl);
1046 if (err)
1047 return err;
1048 }
1049 if (mpls_mask->mpls_tc) {
1050 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
1051 mpls_key->mpls_tc);
1052 if (err)
1053 return err;
1054 }
1055 if (mpls_mask->mpls_label) {
1056 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
1057 mpls_key->mpls_label);
1058 if (err)
1059 return err;
1060 }
1061 if (mpls_mask->mpls_bos) {
1062 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
1063 mpls_key->mpls_bos);
1064 if (err)
1065 return err;
1066 }
1067 return 0;
1068}
1069
4d80cc0a
OG		 1070static int fl_dump_key_ip(struct sk_buff *skb,
1071 struct flow_dissector_key_ip *key,
1072 struct flow_dissector_key_ip *mask)
1073{
1074 if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos,
1075 TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) ||
1076 fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl,
1077 TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl)))
1078 return -1;
1079
1080 return 0;
1081}
1082
9399ae9a
HHZ		 1083static int fl_dump_key_vlan(struct sk_buff *skb,
1084 struct flow_dissector_key_vlan *vlan_key,
1085 struct flow_dissector_key_vlan *vlan_mask)
1086{
1087 int err;
1088
1089 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1090 return 0;
1091 if (vlan_mask->vlan_id) {
1092 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
1093 vlan_key->vlan_id);
1094 if (err)
1095 return err;
1096 }
1097 if (vlan_mask->vlan_priority) {
1098 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
1099 vlan_key->vlan_priority);
1100 if (err)
1101 return err;
1102 }
1103 return 0;
1104}
1105
faa3ffce
OG		 1106static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1107 u32 *flower_key, u32 *flower_mask,
1108 u32 flower_flag_bit, u32 dissector_flag_bit)
1109{
1110 if (dissector_mask & dissector_flag_bit) {
1111 *flower_mask |= flower_flag_bit;
1112 if (dissector_key & dissector_flag_bit)
1113 *flower_key |= flower_flag_bit;
1114 }
1115}
1116
1117static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1118{
1119 u32 key, mask;
1120 __be32 _key, _mask;
1121 int err;
1122
1123 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1124 return 0;
1125
1126 key = 0;
1127 mask = 0;
1128
1129 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1130 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1131
1132 _key = cpu_to_be32(key);
1133 _mask = cpu_to_be32(mask);
1134
1135 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1136 if (err)
1137 return err;
1138
1139 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1140}
1141
8113c095 1142static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
77b9900e
JP		 1143 struct sk_buff *skb, struct tcmsg *t)
1144{
1145 struct cls_fl_head *head = rtnl_dereference(tp->root);
8113c095 1146 struct cls_fl_filter *f = fh;
77b9900e
JP		 1147 struct nlattr *nest;
1148 struct fl_flow_key *key, *mask;
1149
1150 if (!f)
1151 return skb->len;
1152
1153 t->tcm_handle = f->handle;
1154
1155 nest = nla_nest_start(skb, TCA_OPTIONS);
1156 if (!nest)
1157 goto nla_put_failure;
1158
1159 if (f->res.classid &&
1160 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
1161 goto nla_put_failure;
1162
1163 key = &f->key;
1164 mask = &head->mask.key;
1165
1166 if (mask->indev_ifindex) {
1167 struct net_device *dev;
1168
1169 dev = __dev_get_by_index(net, key->indev_ifindex);
1170 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1171 goto nla_put_failure;
1172 }
1173
79685219
HHZ		 1174 if (!tc_skip_hw(f->flags))
1175 fl_hw_update_stats(tp, f);
10cbc684 1176
77b9900e
JP		 1177 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1178 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1179 sizeof(key->eth.dst)) ||
1180 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1181 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1182 sizeof(key->eth.src)) ||
1183 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1184 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1185 sizeof(key->basic.n_proto)))
1186 goto nla_put_failure;
9399ae9a 1187
a577d8f7
BL		 1188 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
1189 goto nla_put_failure;
1190
9399ae9a
HHZ		 1191 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
1192 goto nla_put_failure;
1193
77b9900e
JP		 1194 if ((key->basic.n_proto == htons(ETH_P_IP) ||
1195 key->basic.n_proto == htons(ETH_P_IPV6)) &&
4d80cc0a 1196 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
77b9900e 1197 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
4d80cc0a
OG		 1198 sizeof(key->basic.ip_proto)) ||
1199 fl_dump_key_ip(skb, &key->ip, &mask->ip)))
77b9900e
JP		 1200 goto nla_put_failure;
1201
c3f83241 1202 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
77b9900e
JP		 1203 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1204 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1205 sizeof(key->ipv4.src)) ||
1206 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1207 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1208 sizeof(key->ipv4.dst))))
1209 goto nla_put_failure;
c3f83241 1210 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
77b9900e
JP		 1211 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1212 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1213 sizeof(key->ipv6.src)) ||
1214 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1215 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1216 sizeof(key->ipv6.dst))))
1217 goto nla_put_failure;
1218
1219 if (key->basic.ip_proto == IPPROTO_TCP &&
1220 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
aa72d708 1221 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
77b9900e
JP		 1222 sizeof(key->tp.src)) ||
1223 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
aa72d708 1224 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
fdfc7dd6
JP		 1225 sizeof(key->tp.dst)) ||
1226 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1227 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1228 sizeof(key->tcp.flags))))
77b9900e
JP		 1229 goto nla_put_failure;
1230 else if (key->basic.ip_proto == IPPROTO_UDP &&
1231 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
aa72d708 1232 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
77b9900e
JP		 1233 sizeof(key->tp.src)) ||
1234 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
aa72d708 1235 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
5976c5f4
SH		 1236 sizeof(key->tp.dst))))
1237 goto nla_put_failure;
1238 else if (key->basic.ip_proto == IPPROTO_SCTP &&
1239 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1240 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1241 sizeof(key->tp.src)) ||
1242 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1243 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
77b9900e
JP		 1244 sizeof(key->tp.dst))))
1245 goto nla_put_failure;
7b684884
SH		 1246 else if (key->basic.n_proto == htons(ETH_P_IP) &&
1247 key->basic.ip_proto == IPPROTO_ICMP &&
1248 (fl_dump_key_val(skb, &key->icmp.type,
1249 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1250 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1251 sizeof(key->icmp.type)) ||
1252 fl_dump_key_val(skb, &key->icmp.code,
1253 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1254 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1255 sizeof(key->icmp.code))))
1256 goto nla_put_failure;
1257 else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1258 key->basic.ip_proto == IPPROTO_ICMPV6 &&
1259 (fl_dump_key_val(skb, &key->icmp.type,
1260 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1261 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1262 sizeof(key->icmp.type)) ||
1263 fl_dump_key_val(skb, &key->icmp.code,
1264 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1265 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1266 sizeof(key->icmp.code))))
1267 goto nla_put_failure;
99d31326
SH		 1268 else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1269 key->basic.n_proto == htons(ETH_P_RARP)) &&
1270 (fl_dump_key_val(skb, &key->arp.sip,
1271 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1272 TCA_FLOWER_KEY_ARP_SIP_MASK,
1273 sizeof(key->arp.sip)) ||
1274 fl_dump_key_val(skb, &key->arp.tip,
1275 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1276 TCA_FLOWER_KEY_ARP_TIP_MASK,
1277 sizeof(key->arp.tip)) ||
1278 fl_dump_key_val(skb, &key->arp.op,
1279 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1280 TCA_FLOWER_KEY_ARP_OP_MASK,
1281 sizeof(key->arp.op)) ||
1282 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1283 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1284 sizeof(key->arp.sha)) ||
1285 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1286 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1287 sizeof(key->arp.tha))))
1288 goto nla_put_failure;
77b9900e 1289
bc3103f1
AV		 1290 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1291 (fl_dump_key_val(skb, &key->enc_ipv4.src,
1292 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1293 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1294 sizeof(key->enc_ipv4.src)) ||
1295 fl_dump_key_val(skb, &key->enc_ipv4.dst,
1296 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1297 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1298 sizeof(key->enc_ipv4.dst))))
1299 goto nla_put_failure;
1300 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1301 (fl_dump_key_val(skb, &key->enc_ipv6.src,
1302 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1303 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1304 sizeof(key->enc_ipv6.src)) ||
1305 fl_dump_key_val(skb, &key->enc_ipv6.dst,
1306 TCA_FLOWER_KEY_ENC_IPV6_DST,
1307 &mask->enc_ipv6.dst,
1308 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1309 sizeof(key->enc_ipv6.dst))))
1310 goto nla_put_failure;
1311
1312 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
eb523f42 1313 &mask->enc_key_id, TCA_FLOWER_UNSPEC,
f4d997fd
HHZ		 1314 sizeof(key->enc_key_id)) ||
1315 fl_dump_key_val(skb, &key->enc_tp.src,
1316 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1317 &mask->enc_tp.src,
1318 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1319 sizeof(key->enc_tp.src)) ||
1320 fl_dump_key_val(skb, &key->enc_tp.dst,
1321 TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1322 &mask->enc_tp.dst,
1323 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1324 sizeof(key->enc_tp.dst)))
bc3103f1
AV		 1325 goto nla_put_failure;
1326
faa3ffce
OG		 1327 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1328 goto nla_put_failure;
1329
749e6720
OG		 1330 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
1331 goto nla_put_failure;
e69985c6 1332
77b9900e
JP		 1333 if (tcf_exts_dump(skb, &f->exts))
1334 goto nla_put_failure;
1335
1336 nla_nest_end(skb, nest);
1337
1338 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
1339 goto nla_put_failure;
1340
1341 return skb->len;
1342
1343nla_put_failure:
1344 nla_nest_cancel(skb, nest);
1345 return -1;
1346}
1347
07d79fc7
CW		 1348static void fl_bind_class(void *fh, u32 classid, unsigned long cl)
1349{
1350 struct cls_fl_filter *f = fh;
1351
1352 if (f && f->res.classid == classid)
1353 f->res.class = cl;
1354}
1355
77b9900e
JP		 1356static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1357 .kind = "flower",
1358 .classify = fl_classify,
1359 .init = fl_init,
1360 .destroy = fl_destroy,
1361 .get = fl_get,
1362 .change = fl_change,
1363 .delete = fl_delete,
1364 .walk = fl_walk,
1365 .dump = fl_dump,
07d79fc7 1366 .bind_class = fl_bind_class,
77b9900e
JP		 1367 .owner = THIS_MODULE,
1368};
1369
1370static int __init cls_fl_init(void)
1371{
1372 return register_tcf_proto_ops(&cls_fl_ops);
1373}
1374
1375static void __exit cls_fl_exit(void)
1376{
1377 unregister_tcf_proto_ops(&cls_fl_ops);
1378}
1379
1380module_init(cls_fl_init);
1381module_exit(cls_fl_exit);
1382
1383MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
1384MODULE_DESCRIPTION("Flower classifier");
1385MODULE_LICENSE("GPL v2");
Linux 6.x block layer and io_uring tree(s)