Commit | Line | Data |
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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> | |
21 | ||
22 | #include <net/sch_generic.h> | |
23 | #include <net/pkt_cls.h> | |
24 | #include <net/ip.h> | |
25 | #include <net/flow_dissector.h> | |
26 | ||
bc3103f1 AV |
27 | #include <net/dst.h> |
28 | #include <net/dst_metadata.h> | |
29 | ||
77b9900e JP |
30 | struct fl_flow_key { |
31 | int indev_ifindex; | |
42aecaa9 | 32 | struct flow_dissector_key_control control; |
bc3103f1 | 33 | struct flow_dissector_key_control enc_control; |
77b9900e JP |
34 | struct flow_dissector_key_basic basic; |
35 | struct flow_dissector_key_eth_addrs eth; | |
9399ae9a | 36 | struct flow_dissector_key_vlan vlan; |
77b9900e | 37 | union { |
c3f83241 | 38 | struct flow_dissector_key_ipv4_addrs ipv4; |
77b9900e JP |
39 | struct flow_dissector_key_ipv6_addrs ipv6; |
40 | }; | |
41 | struct flow_dissector_key_ports tp; | |
7b684884 | 42 | struct flow_dissector_key_icmp icmp; |
bc3103f1 AV |
43 | struct flow_dissector_key_keyid enc_key_id; |
44 | union { | |
45 | struct flow_dissector_key_ipv4_addrs enc_ipv4; | |
46 | struct flow_dissector_key_ipv6_addrs enc_ipv6; | |
47 | }; | |
f4d997fd | 48 | struct flow_dissector_key_ports enc_tp; |
77b9900e JP |
49 | } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ |
50 | ||
51 | struct fl_flow_mask_range { | |
52 | unsigned short int start; | |
53 | unsigned short int end; | |
54 | }; | |
55 | ||
56 | struct fl_flow_mask { | |
57 | struct fl_flow_key key; | |
58 | struct fl_flow_mask_range range; | |
59 | struct rcu_head rcu; | |
60 | }; | |
61 | ||
62 | struct cls_fl_head { | |
63 | struct rhashtable ht; | |
64 | struct fl_flow_mask mask; | |
65 | struct flow_dissector dissector; | |
66 | u32 hgen; | |
67 | bool mask_assigned; | |
68 | struct list_head filters; | |
69 | struct rhashtable_params ht_params; | |
d9363774 DB |
70 | union { |
71 | struct work_struct work; | |
72 | struct rcu_head rcu; | |
73 | }; | |
77b9900e JP |
74 | }; |
75 | ||
76 | struct cls_fl_filter { | |
77 | struct rhash_head ht_node; | |
78 | struct fl_flow_key mkey; | |
79 | struct tcf_exts exts; | |
80 | struct tcf_result res; | |
81 | struct fl_flow_key key; | |
82 | struct list_head list; | |
83 | u32 handle; | |
e69985c6 | 84 | u32 flags; |
77b9900e | 85 | struct rcu_head rcu; |
7091d8c7 HHZ |
86 | struct tc_to_netdev tc; |
87 | struct net_device *hw_dev; | |
77b9900e JP |
88 | }; |
89 | ||
90 | static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) | |
91 | { | |
92 | return mask->range.end - mask->range.start; | |
93 | } | |
94 | ||
95 | static void fl_mask_update_range(struct fl_flow_mask *mask) | |
96 | { | |
97 | const u8 *bytes = (const u8 *) &mask->key; | |
98 | size_t size = sizeof(mask->key); | |
99 | size_t i, first = 0, last = size - 1; | |
100 | ||
101 | for (i = 0; i < sizeof(mask->key); i++) { | |
102 | if (bytes[i]) { | |
103 | if (!first && i) | |
104 | first = i; | |
105 | last = i; | |
106 | } | |
107 | } | |
108 | mask->range.start = rounddown(first, sizeof(long)); | |
109 | mask->range.end = roundup(last + 1, sizeof(long)); | |
110 | } | |
111 | ||
112 | static void *fl_key_get_start(struct fl_flow_key *key, | |
113 | const struct fl_flow_mask *mask) | |
114 | { | |
115 | return (u8 *) key + mask->range.start; | |
116 | } | |
117 | ||
118 | static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, | |
119 | struct fl_flow_mask *mask) | |
120 | { | |
121 | const long *lkey = fl_key_get_start(key, mask); | |
122 | const long *lmask = fl_key_get_start(&mask->key, mask); | |
123 | long *lmkey = fl_key_get_start(mkey, mask); | |
124 | int i; | |
125 | ||
126 | for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) | |
127 | *lmkey++ = *lkey++ & *lmask++; | |
128 | } | |
129 | ||
130 | static void fl_clear_masked_range(struct fl_flow_key *key, | |
131 | struct fl_flow_mask *mask) | |
132 | { | |
133 | memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); | |
134 | } | |
135 | ||
136 | static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, | |
137 | struct tcf_result *res) | |
138 | { | |
139 | struct cls_fl_head *head = rcu_dereference_bh(tp->root); | |
140 | struct cls_fl_filter *f; | |
141 | struct fl_flow_key skb_key; | |
142 | struct fl_flow_key skb_mkey; | |
bc3103f1 | 143 | struct ip_tunnel_info *info; |
77b9900e | 144 | |
e69985c6 AV |
145 | if (!atomic_read(&head->ht.nelems)) |
146 | return -1; | |
147 | ||
77b9900e | 148 | fl_clear_masked_range(&skb_key, &head->mask); |
bc3103f1 AV |
149 | |
150 | info = skb_tunnel_info(skb); | |
151 | if (info) { | |
152 | struct ip_tunnel_key *key = &info->key; | |
153 | ||
154 | switch (ip_tunnel_info_af(info)) { | |
155 | case AF_INET: | |
156 | skb_key.enc_ipv4.src = key->u.ipv4.src; | |
157 | skb_key.enc_ipv4.dst = key->u.ipv4.dst; | |
158 | break; | |
159 | case AF_INET6: | |
160 | skb_key.enc_ipv6.src = key->u.ipv6.src; | |
161 | skb_key.enc_ipv6.dst = key->u.ipv6.dst; | |
162 | break; | |
163 | } | |
164 | ||
165 | skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id); | |
f4d997fd HHZ |
166 | skb_key.enc_tp.src = key->tp_src; |
167 | skb_key.enc_tp.dst = key->tp_dst; | |
bc3103f1 AV |
168 | } |
169 | ||
77b9900e JP |
170 | skb_key.indev_ifindex = skb->skb_iif; |
171 | /* skb_flow_dissect() does not set n_proto in case an unknown protocol, | |
172 | * so do it rather here. | |
173 | */ | |
174 | skb_key.basic.n_proto = skb->protocol; | |
cd79a238 | 175 | skb_flow_dissect(skb, &head->dissector, &skb_key, 0); |
77b9900e JP |
176 | |
177 | fl_set_masked_key(&skb_mkey, &skb_key, &head->mask); | |
178 | ||
179 | f = rhashtable_lookup_fast(&head->ht, | |
180 | fl_key_get_start(&skb_mkey, &head->mask), | |
181 | head->ht_params); | |
e8eb36cd | 182 | if (f && !tc_skip_sw(f->flags)) { |
77b9900e JP |
183 | *res = f->res; |
184 | return tcf_exts_exec(skb, &f->exts, res); | |
185 | } | |
186 | return -1; | |
187 | } | |
188 | ||
189 | static int fl_init(struct tcf_proto *tp) | |
190 | { | |
191 | struct cls_fl_head *head; | |
192 | ||
193 | head = kzalloc(sizeof(*head), GFP_KERNEL); | |
194 | if (!head) | |
195 | return -ENOBUFS; | |
196 | ||
197 | INIT_LIST_HEAD_RCU(&head->filters); | |
198 | rcu_assign_pointer(tp->root, head); | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | static void fl_destroy_filter(struct rcu_head *head) | |
204 | { | |
205 | struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu); | |
206 | ||
207 | tcf_exts_destroy(&f->exts); | |
208 | kfree(f); | |
209 | } | |
210 | ||
3036dab6 | 211 | static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f) |
5b33f488 | 212 | { |
5b33f488 | 213 | struct tc_cls_flower_offload offload = {0}; |
7091d8c7 HHZ |
214 | struct net_device *dev = f->hw_dev; |
215 | struct tc_to_netdev *tc = &f->tc; | |
5b33f488 | 216 | |
79685219 | 217 | if (!tc_can_offload(dev, tp)) |
5b33f488 AV |
218 | return; |
219 | ||
220 | offload.command = TC_CLSFLOWER_DESTROY; | |
3036dab6 | 221 | offload.cookie = (unsigned long)f; |
5b33f488 | 222 | |
7091d8c7 HHZ |
223 | tc->type = TC_SETUP_CLSFLOWER; |
224 | tc->cls_flower = &offload; | |
5b33f488 | 225 | |
7091d8c7 | 226 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); |
5b33f488 AV |
227 | } |
228 | ||
e8eb36cd AV |
229 | static int fl_hw_replace_filter(struct tcf_proto *tp, |
230 | struct flow_dissector *dissector, | |
231 | struct fl_flow_key *mask, | |
3036dab6 | 232 | struct cls_fl_filter *f) |
5b33f488 AV |
233 | { |
234 | struct net_device *dev = tp->q->dev_queue->dev; | |
235 | struct tc_cls_flower_offload offload = {0}; | |
7091d8c7 | 236 | struct tc_to_netdev *tc = &f->tc; |
e8eb36cd | 237 | int err; |
5b33f488 | 238 | |
7091d8c7 | 239 | if (!tc_can_offload(dev, tp)) { |
a6e16931 HHZ |
240 | if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) || |
241 | (f->hw_dev && !tc_can_offload(f->hw_dev, tp))) { | |
242 | f->hw_dev = dev; | |
7091d8c7 | 243 | return tc_skip_sw(f->flags) ? -EINVAL : 0; |
a6e16931 | 244 | } |
7091d8c7 HHZ |
245 | dev = f->hw_dev; |
246 | tc->egress_dev = true; | |
247 | } else { | |
248 | f->hw_dev = dev; | |
249 | } | |
5b33f488 AV |
250 | |
251 | offload.command = TC_CLSFLOWER_REPLACE; | |
3036dab6 | 252 | offload.cookie = (unsigned long)f; |
5b33f488 AV |
253 | offload.dissector = dissector; |
254 | offload.mask = mask; | |
f93bd17b | 255 | offload.key = &f->mkey; |
3036dab6 | 256 | offload.exts = &f->exts; |
5b33f488 | 257 | |
7091d8c7 HHZ |
258 | tc->type = TC_SETUP_CLSFLOWER; |
259 | tc->cls_flower = &offload; | |
5b33f488 | 260 | |
5a7a5555 | 261 | err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, |
7091d8c7 | 262 | tc); |
e8eb36cd | 263 | |
3036dab6 | 264 | if (tc_skip_sw(f->flags)) |
e8eb36cd | 265 | return err; |
e8eb36cd | 266 | return 0; |
5b33f488 AV |
267 | } |
268 | ||
10cbc684 AV |
269 | static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) |
270 | { | |
10cbc684 | 271 | struct tc_cls_flower_offload offload = {0}; |
7091d8c7 HHZ |
272 | struct net_device *dev = f->hw_dev; |
273 | struct tc_to_netdev *tc = &f->tc; | |
10cbc684 | 274 | |
79685219 | 275 | if (!tc_can_offload(dev, tp)) |
10cbc684 AV |
276 | return; |
277 | ||
278 | offload.command = TC_CLSFLOWER_STATS; | |
279 | offload.cookie = (unsigned long)f; | |
280 | offload.exts = &f->exts; | |
281 | ||
7091d8c7 HHZ |
282 | tc->type = TC_SETUP_CLSFLOWER; |
283 | tc->cls_flower = &offload; | |
10cbc684 | 284 | |
7091d8c7 | 285 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); |
10cbc684 AV |
286 | } |
287 | ||
13fa876e RD |
288 | static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f) |
289 | { | |
290 | list_del_rcu(&f->list); | |
79685219 | 291 | if (!tc_skip_hw(f->flags)) |
3036dab6 | 292 | fl_hw_destroy_filter(tp, f); |
13fa876e RD |
293 | tcf_unbind_filter(tp, &f->res); |
294 | call_rcu(&f->rcu, fl_destroy_filter); | |
295 | } | |
296 | ||
d9363774 DB |
297 | static void fl_destroy_sleepable(struct work_struct *work) |
298 | { | |
299 | struct cls_fl_head *head = container_of(work, struct cls_fl_head, | |
300 | work); | |
301 | if (head->mask_assigned) | |
302 | rhashtable_destroy(&head->ht); | |
303 | kfree(head); | |
304 | module_put(THIS_MODULE); | |
305 | } | |
306 | ||
307 | static void fl_destroy_rcu(struct rcu_head *rcu) | |
308 | { | |
309 | struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu); | |
310 | ||
311 | INIT_WORK(&head->work, fl_destroy_sleepable); | |
312 | schedule_work(&head->work); | |
313 | } | |
314 | ||
77b9900e JP |
315 | static bool fl_destroy(struct tcf_proto *tp, bool force) |
316 | { | |
317 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
318 | struct cls_fl_filter *f, *next; | |
319 | ||
320 | if (!force && !list_empty(&head->filters)) | |
321 | return false; | |
322 | ||
13fa876e RD |
323 | list_for_each_entry_safe(f, next, &head->filters, list) |
324 | __fl_delete(tp, f); | |
d9363774 DB |
325 | |
326 | __module_get(THIS_MODULE); | |
327 | call_rcu(&head->rcu, fl_destroy_rcu); | |
2745529a | 328 | |
77b9900e JP |
329 | return true; |
330 | } | |
331 | ||
332 | static unsigned long fl_get(struct tcf_proto *tp, u32 handle) | |
333 | { | |
334 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
335 | struct cls_fl_filter *f; | |
336 | ||
337 | list_for_each_entry(f, &head->filters, list) | |
338 | if (f->handle == handle) | |
339 | return (unsigned long) f; | |
340 | return 0; | |
341 | } | |
342 | ||
343 | static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { | |
344 | [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, | |
345 | [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, | |
346 | [TCA_FLOWER_INDEV] = { .type = NLA_STRING, | |
347 | .len = IFNAMSIZ }, | |
348 | [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, | |
349 | [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, | |
350 | [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, | |
351 | [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, | |
352 | [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, | |
353 | [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, | |
354 | [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, | |
355 | [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, | |
356 | [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, | |
357 | [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, | |
358 | [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, | |
359 | [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, | |
360 | [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, | |
361 | [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, | |
362 | [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, | |
363 | [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, | |
b175c3a4 JHS |
364 | [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, |
365 | [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, | |
9399ae9a HHZ |
366 | [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, |
367 | [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, | |
368 | [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, | |
bc3103f1 AV |
369 | [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, |
370 | [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, | |
371 | [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, | |
372 | [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, | |
373 | [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, | |
374 | [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, | |
375 | [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, | |
376 | [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, | |
377 | [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, | |
aa72d708 OG |
378 | [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, |
379 | [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, | |
380 | [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, | |
381 | [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, | |
5976c5f4 SH |
382 | [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, |
383 | [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, | |
384 | [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, | |
385 | [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, | |
f4d997fd HHZ |
386 | [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, |
387 | [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, | |
388 | [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, | |
389 | [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, | |
faa3ffce OG |
390 | [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, |
391 | [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, | |
7b684884 SH |
392 | [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, |
393 | [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, | |
394 | [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, | |
395 | [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, | |
396 | [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, | |
397 | [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, | |
398 | [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, | |
399 | [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, | |
77b9900e JP |
400 | }; |
401 | ||
402 | static void fl_set_key_val(struct nlattr **tb, | |
403 | void *val, int val_type, | |
404 | void *mask, int mask_type, int len) | |
405 | { | |
406 | if (!tb[val_type]) | |
407 | return; | |
408 | memcpy(val, nla_data(tb[val_type]), len); | |
409 | if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) | |
410 | memset(mask, 0xff, len); | |
411 | else | |
412 | memcpy(mask, nla_data(tb[mask_type]), len); | |
413 | } | |
414 | ||
9399ae9a HHZ |
415 | static void fl_set_key_vlan(struct nlattr **tb, |
416 | struct flow_dissector_key_vlan *key_val, | |
417 | struct flow_dissector_key_vlan *key_mask) | |
418 | { | |
419 | #define VLAN_PRIORITY_MASK 0x7 | |
420 | ||
421 | if (tb[TCA_FLOWER_KEY_VLAN_ID]) { | |
422 | key_val->vlan_id = | |
423 | nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK; | |
424 | key_mask->vlan_id = VLAN_VID_MASK; | |
425 | } | |
426 | if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) { | |
427 | key_val->vlan_priority = | |
428 | nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) & | |
429 | VLAN_PRIORITY_MASK; | |
430 | key_mask->vlan_priority = VLAN_PRIORITY_MASK; | |
431 | } | |
432 | } | |
433 | ||
faa3ffce OG |
434 | static void fl_set_key_flag(u32 flower_key, u32 flower_mask, |
435 | u32 *dissector_key, u32 *dissector_mask, | |
436 | u32 flower_flag_bit, u32 dissector_flag_bit) | |
437 | { | |
438 | if (flower_mask & flower_flag_bit) { | |
439 | *dissector_mask |= dissector_flag_bit; | |
440 | if (flower_key & flower_flag_bit) | |
441 | *dissector_key |= dissector_flag_bit; | |
442 | } | |
443 | } | |
444 | ||
d9724772 OG |
445 | static int fl_set_key_flags(struct nlattr **tb, |
446 | u32 *flags_key, u32 *flags_mask) | |
faa3ffce OG |
447 | { |
448 | u32 key, mask; | |
449 | ||
d9724772 OG |
450 | /* mask is mandatory for flags */ |
451 | if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) | |
452 | return -EINVAL; | |
faa3ffce OG |
453 | |
454 | key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); | |
d9724772 | 455 | mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); |
faa3ffce OG |
456 | |
457 | *flags_key = 0; | |
458 | *flags_mask = 0; | |
459 | ||
460 | fl_set_key_flag(key, mask, flags_key, flags_mask, | |
461 | TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); | |
d9724772 OG |
462 | |
463 | return 0; | |
faa3ffce OG |
464 | } |
465 | ||
77b9900e JP |
466 | static int fl_set_key(struct net *net, struct nlattr **tb, |
467 | struct fl_flow_key *key, struct fl_flow_key *mask) | |
468 | { | |
9399ae9a | 469 | __be16 ethertype; |
d9724772 | 470 | int ret = 0; |
dd3aa3b5 | 471 | #ifdef CONFIG_NET_CLS_IND |
77b9900e | 472 | if (tb[TCA_FLOWER_INDEV]) { |
dd3aa3b5 | 473 | int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]); |
77b9900e JP |
474 | if (err < 0) |
475 | return err; | |
476 | key->indev_ifindex = err; | |
477 | mask->indev_ifindex = 0xffffffff; | |
478 | } | |
dd3aa3b5 | 479 | #endif |
77b9900e JP |
480 | |
481 | fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, | |
482 | mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, | |
483 | sizeof(key->eth.dst)); | |
484 | fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, | |
485 | mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, | |
486 | sizeof(key->eth.src)); | |
66530bdf | 487 | |
0b498a52 | 488 | if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { |
9399ae9a HHZ |
489 | ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); |
490 | ||
0b498a52 AB |
491 | if (ethertype == htons(ETH_P_8021Q)) { |
492 | fl_set_key_vlan(tb, &key->vlan, &mask->vlan); | |
493 | fl_set_key_val(tb, &key->basic.n_proto, | |
494 | TCA_FLOWER_KEY_VLAN_ETH_TYPE, | |
495 | &mask->basic.n_proto, TCA_FLOWER_UNSPEC, | |
496 | sizeof(key->basic.n_proto)); | |
497 | } else { | |
498 | key->basic.n_proto = ethertype; | |
499 | mask->basic.n_proto = cpu_to_be16(~0); | |
500 | } | |
9399ae9a | 501 | } |
66530bdf | 502 | |
77b9900e JP |
503 | if (key->basic.n_proto == htons(ETH_P_IP) || |
504 | key->basic.n_proto == htons(ETH_P_IPV6)) { | |
505 | fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, | |
506 | &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, | |
507 | sizeof(key->basic.ip_proto)); | |
508 | } | |
66530bdf JHS |
509 | |
510 | if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { | |
511 | key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; | |
970bfcd0 | 512 | mask->control.addr_type = ~0; |
77b9900e JP |
513 | fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, |
514 | &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, | |
515 | sizeof(key->ipv4.src)); | |
516 | fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, | |
517 | &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, | |
518 | sizeof(key->ipv4.dst)); | |
66530bdf JHS |
519 | } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { |
520 | key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
970bfcd0 | 521 | mask->control.addr_type = ~0; |
77b9900e JP |
522 | fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, |
523 | &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, | |
524 | sizeof(key->ipv6.src)); | |
525 | fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, | |
526 | &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, | |
527 | sizeof(key->ipv6.dst)); | |
528 | } | |
66530bdf | 529 | |
77b9900e JP |
530 | if (key->basic.ip_proto == IPPROTO_TCP) { |
531 | fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, | |
aa72d708 | 532 | &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, |
77b9900e JP |
533 | sizeof(key->tp.src)); |
534 | fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, | |
aa72d708 | 535 | &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, |
77b9900e JP |
536 | sizeof(key->tp.dst)); |
537 | } else if (key->basic.ip_proto == IPPROTO_UDP) { | |
538 | fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, | |
aa72d708 | 539 | &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, |
77b9900e JP |
540 | sizeof(key->tp.src)); |
541 | fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, | |
aa72d708 | 542 | &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, |
77b9900e | 543 | sizeof(key->tp.dst)); |
5976c5f4 SH |
544 | } else if (key->basic.ip_proto == IPPROTO_SCTP) { |
545 | fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, | |
546 | &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, | |
547 | sizeof(key->tp.src)); | |
548 | fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, | |
549 | &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, | |
550 | sizeof(key->tp.dst)); | |
7b684884 SH |
551 | } else if (key->basic.n_proto == htons(ETH_P_IP) && |
552 | key->basic.ip_proto == IPPROTO_ICMP) { | |
553 | fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, | |
554 | &mask->icmp.type, | |
555 | TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, | |
556 | sizeof(key->icmp.type)); | |
557 | fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, | |
558 | &mask->icmp.code, | |
559 | TCA_FLOWER_KEY_ICMPV4_CODE_MASK, | |
560 | sizeof(key->icmp.code)); | |
561 | } else if (key->basic.n_proto == htons(ETH_P_IPV6) && | |
562 | key->basic.ip_proto == IPPROTO_ICMPV6) { | |
563 | fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, | |
564 | &mask->icmp.type, | |
565 | TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, | |
566 | sizeof(key->icmp.type)); | |
567 | fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, | |
568 | &mask->icmp.code, | |
569 | TCA_FLOWER_KEY_ICMPV4_CODE_MASK, | |
570 | sizeof(key->icmp.code)); | |
77b9900e JP |
571 | } |
572 | ||
bc3103f1 AV |
573 | if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || |
574 | tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { | |
575 | key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; | |
970bfcd0 | 576 | mask->enc_control.addr_type = ~0; |
bc3103f1 AV |
577 | fl_set_key_val(tb, &key->enc_ipv4.src, |
578 | TCA_FLOWER_KEY_ENC_IPV4_SRC, | |
579 | &mask->enc_ipv4.src, | |
580 | TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, | |
581 | sizeof(key->enc_ipv4.src)); | |
582 | fl_set_key_val(tb, &key->enc_ipv4.dst, | |
583 | TCA_FLOWER_KEY_ENC_IPV4_DST, | |
584 | &mask->enc_ipv4.dst, | |
585 | TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, | |
586 | sizeof(key->enc_ipv4.dst)); | |
587 | } | |
588 | ||
589 | if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || | |
590 | tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { | |
591 | key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
970bfcd0 | 592 | mask->enc_control.addr_type = ~0; |
bc3103f1 AV |
593 | fl_set_key_val(tb, &key->enc_ipv6.src, |
594 | TCA_FLOWER_KEY_ENC_IPV6_SRC, | |
595 | &mask->enc_ipv6.src, | |
596 | TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, | |
597 | sizeof(key->enc_ipv6.src)); | |
598 | fl_set_key_val(tb, &key->enc_ipv6.dst, | |
599 | TCA_FLOWER_KEY_ENC_IPV6_DST, | |
600 | &mask->enc_ipv6.dst, | |
601 | TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, | |
602 | sizeof(key->enc_ipv6.dst)); | |
603 | } | |
604 | ||
605 | fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, | |
eb523f42 | 606 | &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, |
bc3103f1 AV |
607 | sizeof(key->enc_key_id.keyid)); |
608 | ||
f4d997fd HHZ |
609 | fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, |
610 | &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, | |
611 | sizeof(key->enc_tp.src)); | |
612 | ||
613 | fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, | |
614 | &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, | |
615 | sizeof(key->enc_tp.dst)); | |
616 | ||
d9724772 OG |
617 | if (tb[TCA_FLOWER_KEY_FLAGS]) |
618 | ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); | |
faa3ffce | 619 | |
d9724772 | 620 | return ret; |
77b9900e JP |
621 | } |
622 | ||
623 | static bool fl_mask_eq(struct fl_flow_mask *mask1, | |
624 | struct fl_flow_mask *mask2) | |
625 | { | |
626 | const long *lmask1 = fl_key_get_start(&mask1->key, mask1); | |
627 | const long *lmask2 = fl_key_get_start(&mask2->key, mask2); | |
628 | ||
629 | return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) && | |
630 | !memcmp(lmask1, lmask2, fl_mask_range(mask1)); | |
631 | } | |
632 | ||
633 | static const struct rhashtable_params fl_ht_params = { | |
634 | .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ | |
635 | .head_offset = offsetof(struct cls_fl_filter, ht_node), | |
636 | .automatic_shrinking = true, | |
637 | }; | |
638 | ||
639 | static int fl_init_hashtable(struct cls_fl_head *head, | |
640 | struct fl_flow_mask *mask) | |
641 | { | |
642 | head->ht_params = fl_ht_params; | |
643 | head->ht_params.key_len = fl_mask_range(mask); | |
644 | head->ht_params.key_offset += mask->range.start; | |
645 | ||
646 | return rhashtable_init(&head->ht, &head->ht_params); | |
647 | } | |
648 | ||
649 | #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) | |
650 | #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) | |
77b9900e | 651 | |
339ba878 HHZ |
652 | #define FL_KEY_IS_MASKED(mask, member) \ |
653 | memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ | |
654 | 0, FL_KEY_MEMBER_SIZE(member)) \ | |
77b9900e JP |
655 | |
656 | #define FL_KEY_SET(keys, cnt, id, member) \ | |
657 | do { \ | |
658 | keys[cnt].key_id = id; \ | |
659 | keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ | |
660 | cnt++; \ | |
661 | } while(0); | |
662 | ||
339ba878 | 663 | #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ |
77b9900e | 664 | do { \ |
339ba878 | 665 | if (FL_KEY_IS_MASKED(mask, member)) \ |
77b9900e JP |
666 | FL_KEY_SET(keys, cnt, id, member); \ |
667 | } while(0); | |
668 | ||
669 | static void fl_init_dissector(struct cls_fl_head *head, | |
670 | struct fl_flow_mask *mask) | |
671 | { | |
672 | struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; | |
673 | size_t cnt = 0; | |
674 | ||
42aecaa9 | 675 | FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); |
77b9900e | 676 | FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); |
339ba878 HHZ |
677 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
678 | FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); | |
679 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
680 | FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); | |
681 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
682 | FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); | |
683 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
684 | FLOW_DISSECTOR_KEY_PORTS, tp); | |
7b684884 SH |
685 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
686 | FLOW_DISSECTOR_KEY_ICMP, icmp); | |
9399ae9a HHZ |
687 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
688 | FLOW_DISSECTOR_KEY_VLAN, vlan); | |
519d1052 HHZ |
689 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
690 | FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); | |
691 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
692 | FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); | |
693 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
694 | FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); | |
695 | if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) || | |
696 | FL_KEY_IS_MASKED(&mask->key, enc_ipv6)) | |
697 | FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, | |
698 | enc_control); | |
f4d997fd HHZ |
699 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
700 | FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); | |
77b9900e JP |
701 | |
702 | skb_flow_dissector_init(&head->dissector, keys, cnt); | |
703 | } | |
704 | ||
705 | static int fl_check_assign_mask(struct cls_fl_head *head, | |
706 | struct fl_flow_mask *mask) | |
707 | { | |
708 | int err; | |
709 | ||
710 | if (head->mask_assigned) { | |
711 | if (!fl_mask_eq(&head->mask, mask)) | |
712 | return -EINVAL; | |
713 | else | |
714 | return 0; | |
715 | } | |
716 | ||
717 | /* Mask is not assigned yet. So assign it and init hashtable | |
718 | * according to that. | |
719 | */ | |
720 | err = fl_init_hashtable(head, mask); | |
721 | if (err) | |
722 | return err; | |
723 | memcpy(&head->mask, mask, sizeof(head->mask)); | |
724 | head->mask_assigned = true; | |
725 | ||
726 | fl_init_dissector(head, mask); | |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
731 | static int fl_set_parms(struct net *net, struct tcf_proto *tp, | |
732 | struct cls_fl_filter *f, struct fl_flow_mask *mask, | |
733 | unsigned long base, struct nlattr **tb, | |
734 | struct nlattr *est, bool ovr) | |
735 | { | |
736 | struct tcf_exts e; | |
737 | int err; | |
738 | ||
b9a24bb7 | 739 | err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0); |
77b9900e JP |
740 | if (err < 0) |
741 | return err; | |
b9a24bb7 WC |
742 | err = tcf_exts_validate(net, tp, tb, est, &e, ovr); |
743 | if (err < 0) | |
744 | goto errout; | |
77b9900e JP |
745 | |
746 | if (tb[TCA_FLOWER_CLASSID]) { | |
747 | f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); | |
748 | tcf_bind_filter(tp, &f->res, base); | |
749 | } | |
750 | ||
751 | err = fl_set_key(net, tb, &f->key, &mask->key); | |
752 | if (err) | |
753 | goto errout; | |
754 | ||
755 | fl_mask_update_range(mask); | |
756 | fl_set_masked_key(&f->mkey, &f->key, mask); | |
757 | ||
758 | tcf_exts_change(tp, &f->exts, &e); | |
759 | ||
760 | return 0; | |
761 | errout: | |
762 | tcf_exts_destroy(&e); | |
763 | return err; | |
764 | } | |
765 | ||
766 | static u32 fl_grab_new_handle(struct tcf_proto *tp, | |
767 | struct cls_fl_head *head) | |
768 | { | |
769 | unsigned int i = 0x80000000; | |
770 | u32 handle; | |
771 | ||
772 | do { | |
773 | if (++head->hgen == 0x7FFFFFFF) | |
774 | head->hgen = 1; | |
775 | } while (--i > 0 && fl_get(tp, head->hgen)); | |
776 | ||
777 | if (unlikely(i == 0)) { | |
778 | pr_err("Insufficient number of handles\n"); | |
779 | handle = 0; | |
780 | } else { | |
781 | handle = head->hgen; | |
782 | } | |
783 | ||
784 | return handle; | |
785 | } | |
786 | ||
787 | static int fl_change(struct net *net, struct sk_buff *in_skb, | |
788 | struct tcf_proto *tp, unsigned long base, | |
789 | u32 handle, struct nlattr **tca, | |
790 | unsigned long *arg, bool ovr) | |
791 | { | |
792 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
793 | struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg; | |
794 | struct cls_fl_filter *fnew; | |
795 | struct nlattr *tb[TCA_FLOWER_MAX + 1]; | |
796 | struct fl_flow_mask mask = {}; | |
797 | int err; | |
798 | ||
799 | if (!tca[TCA_OPTIONS]) | |
800 | return -EINVAL; | |
801 | ||
802 | err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], fl_policy); | |
803 | if (err < 0) | |
804 | return err; | |
805 | ||
806 | if (fold && handle && fold->handle != handle) | |
807 | return -EINVAL; | |
808 | ||
809 | fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); | |
810 | if (!fnew) | |
811 | return -ENOBUFS; | |
812 | ||
b9a24bb7 WC |
813 | err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); |
814 | if (err < 0) | |
815 | goto errout; | |
77b9900e JP |
816 | |
817 | if (!handle) { | |
818 | handle = fl_grab_new_handle(tp, head); | |
819 | if (!handle) { | |
820 | err = -EINVAL; | |
821 | goto errout; | |
822 | } | |
823 | } | |
824 | fnew->handle = handle; | |
825 | ||
e69985c6 AV |
826 | if (tb[TCA_FLOWER_FLAGS]) { |
827 | fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); | |
828 | ||
829 | if (!tc_flags_valid(fnew->flags)) { | |
830 | err = -EINVAL; | |
831 | goto errout; | |
832 | } | |
833 | } | |
5b33f488 | 834 | |
77b9900e JP |
835 | err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr); |
836 | if (err) | |
837 | goto errout; | |
838 | ||
839 | err = fl_check_assign_mask(head, &mask); | |
840 | if (err) | |
841 | goto errout; | |
842 | ||
e8eb36cd | 843 | if (!tc_skip_sw(fnew->flags)) { |
e69985c6 AV |
844 | err = rhashtable_insert_fast(&head->ht, &fnew->ht_node, |
845 | head->ht_params); | |
846 | if (err) | |
847 | goto errout; | |
848 | } | |
5b33f488 | 849 | |
79685219 HHZ |
850 | if (!tc_skip_hw(fnew->flags)) { |
851 | err = fl_hw_replace_filter(tp, | |
852 | &head->dissector, | |
853 | &mask.key, | |
3036dab6 | 854 | fnew); |
79685219 HHZ |
855 | if (err) |
856 | goto errout; | |
857 | } | |
5b33f488 AV |
858 | |
859 | if (fold) { | |
725cbb62 JP |
860 | if (!tc_skip_sw(fold->flags)) |
861 | rhashtable_remove_fast(&head->ht, &fold->ht_node, | |
862 | head->ht_params); | |
79685219 | 863 | if (!tc_skip_hw(fold->flags)) |
3036dab6 | 864 | fl_hw_destroy_filter(tp, fold); |
5b33f488 | 865 | } |
77b9900e JP |
866 | |
867 | *arg = (unsigned long) fnew; | |
868 | ||
869 | if (fold) { | |
ff3532f2 | 870 | list_replace_rcu(&fold->list, &fnew->list); |
77b9900e JP |
871 | tcf_unbind_filter(tp, &fold->res); |
872 | call_rcu(&fold->rcu, fl_destroy_filter); | |
873 | } else { | |
874 | list_add_tail_rcu(&fnew->list, &head->filters); | |
875 | } | |
876 | ||
877 | return 0; | |
878 | ||
879 | errout: | |
b9a24bb7 | 880 | tcf_exts_destroy(&fnew->exts); |
77b9900e JP |
881 | kfree(fnew); |
882 | return err; | |
883 | } | |
884 | ||
885 | static int fl_delete(struct tcf_proto *tp, unsigned long arg) | |
886 | { | |
887 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
888 | struct cls_fl_filter *f = (struct cls_fl_filter *) arg; | |
889 | ||
725cbb62 JP |
890 | if (!tc_skip_sw(f->flags)) |
891 | rhashtable_remove_fast(&head->ht, &f->ht_node, | |
892 | head->ht_params); | |
13fa876e | 893 | __fl_delete(tp, f); |
77b9900e JP |
894 | return 0; |
895 | } | |
896 | ||
897 | static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) | |
898 | { | |
899 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
900 | struct cls_fl_filter *f; | |
901 | ||
902 | list_for_each_entry_rcu(f, &head->filters, list) { | |
903 | if (arg->count < arg->skip) | |
904 | goto skip; | |
905 | if (arg->fn(tp, (unsigned long) f, arg) < 0) { | |
906 | arg->stop = 1; | |
907 | break; | |
908 | } | |
909 | skip: | |
910 | arg->count++; | |
911 | } | |
912 | } | |
913 | ||
914 | static int fl_dump_key_val(struct sk_buff *skb, | |
915 | void *val, int val_type, | |
916 | void *mask, int mask_type, int len) | |
917 | { | |
918 | int err; | |
919 | ||
920 | if (!memchr_inv(mask, 0, len)) | |
921 | return 0; | |
922 | err = nla_put(skb, val_type, len, val); | |
923 | if (err) | |
924 | return err; | |
925 | if (mask_type != TCA_FLOWER_UNSPEC) { | |
926 | err = nla_put(skb, mask_type, len, mask); | |
927 | if (err) | |
928 | return err; | |
929 | } | |
930 | return 0; | |
931 | } | |
932 | ||
9399ae9a HHZ |
933 | static int fl_dump_key_vlan(struct sk_buff *skb, |
934 | struct flow_dissector_key_vlan *vlan_key, | |
935 | struct flow_dissector_key_vlan *vlan_mask) | |
936 | { | |
937 | int err; | |
938 | ||
939 | if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) | |
940 | return 0; | |
941 | if (vlan_mask->vlan_id) { | |
942 | err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID, | |
943 | vlan_key->vlan_id); | |
944 | if (err) | |
945 | return err; | |
946 | } | |
947 | if (vlan_mask->vlan_priority) { | |
948 | err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO, | |
949 | vlan_key->vlan_priority); | |
950 | if (err) | |
951 | return err; | |
952 | } | |
953 | return 0; | |
954 | } | |
955 | ||
faa3ffce OG |
956 | static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, |
957 | u32 *flower_key, u32 *flower_mask, | |
958 | u32 flower_flag_bit, u32 dissector_flag_bit) | |
959 | { | |
960 | if (dissector_mask & dissector_flag_bit) { | |
961 | *flower_mask |= flower_flag_bit; | |
962 | if (dissector_key & dissector_flag_bit) | |
963 | *flower_key |= flower_flag_bit; | |
964 | } | |
965 | } | |
966 | ||
967 | static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) | |
968 | { | |
969 | u32 key, mask; | |
970 | __be32 _key, _mask; | |
971 | int err; | |
972 | ||
973 | if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) | |
974 | return 0; | |
975 | ||
976 | key = 0; | |
977 | mask = 0; | |
978 | ||
979 | fl_get_key_flag(flags_key, flags_mask, &key, &mask, | |
980 | TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); | |
981 | ||
982 | _key = cpu_to_be32(key); | |
983 | _mask = cpu_to_be32(mask); | |
984 | ||
985 | err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); | |
986 | if (err) | |
987 | return err; | |
988 | ||
989 | return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); | |
990 | } | |
991 | ||
77b9900e JP |
992 | static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, |
993 | struct sk_buff *skb, struct tcmsg *t) | |
994 | { | |
995 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
996 | struct cls_fl_filter *f = (struct cls_fl_filter *) fh; | |
997 | struct nlattr *nest; | |
998 | struct fl_flow_key *key, *mask; | |
999 | ||
1000 | if (!f) | |
1001 | return skb->len; | |
1002 | ||
1003 | t->tcm_handle = f->handle; | |
1004 | ||
1005 | nest = nla_nest_start(skb, TCA_OPTIONS); | |
1006 | if (!nest) | |
1007 | goto nla_put_failure; | |
1008 | ||
1009 | if (f->res.classid && | |
1010 | nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) | |
1011 | goto nla_put_failure; | |
1012 | ||
1013 | key = &f->key; | |
1014 | mask = &head->mask.key; | |
1015 | ||
1016 | if (mask->indev_ifindex) { | |
1017 | struct net_device *dev; | |
1018 | ||
1019 | dev = __dev_get_by_index(net, key->indev_ifindex); | |
1020 | if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) | |
1021 | goto nla_put_failure; | |
1022 | } | |
1023 | ||
79685219 HHZ |
1024 | if (!tc_skip_hw(f->flags)) |
1025 | fl_hw_update_stats(tp, f); | |
10cbc684 | 1026 | |
77b9900e JP |
1027 | if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, |
1028 | mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, | |
1029 | sizeof(key->eth.dst)) || | |
1030 | fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, | |
1031 | mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, | |
1032 | sizeof(key->eth.src)) || | |
1033 | fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, | |
1034 | &mask->basic.n_proto, TCA_FLOWER_UNSPEC, | |
1035 | sizeof(key->basic.n_proto))) | |
1036 | goto nla_put_failure; | |
9399ae9a HHZ |
1037 | |
1038 | if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan)) | |
1039 | goto nla_put_failure; | |
1040 | ||
77b9900e JP |
1041 | if ((key->basic.n_proto == htons(ETH_P_IP) || |
1042 | key->basic.n_proto == htons(ETH_P_IPV6)) && | |
1043 | fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, | |
1044 | &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, | |
1045 | sizeof(key->basic.ip_proto))) | |
1046 | goto nla_put_failure; | |
1047 | ||
c3f83241 | 1048 | if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && |
77b9900e JP |
1049 | (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, |
1050 | &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, | |
1051 | sizeof(key->ipv4.src)) || | |
1052 | fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, | |
1053 | &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, | |
1054 | sizeof(key->ipv4.dst)))) | |
1055 | goto nla_put_failure; | |
c3f83241 | 1056 | else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && |
77b9900e JP |
1057 | (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, |
1058 | &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, | |
1059 | sizeof(key->ipv6.src)) || | |
1060 | fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, | |
1061 | &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, | |
1062 | sizeof(key->ipv6.dst)))) | |
1063 | goto nla_put_failure; | |
1064 | ||
1065 | if (key->basic.ip_proto == IPPROTO_TCP && | |
1066 | (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, | |
aa72d708 | 1067 | &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, |
77b9900e JP |
1068 | sizeof(key->tp.src)) || |
1069 | fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, | |
aa72d708 | 1070 | &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, |
77b9900e JP |
1071 | sizeof(key->tp.dst)))) |
1072 | goto nla_put_failure; | |
1073 | else if (key->basic.ip_proto == IPPROTO_UDP && | |
1074 | (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, | |
aa72d708 | 1075 | &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, |
77b9900e JP |
1076 | sizeof(key->tp.src)) || |
1077 | fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, | |
aa72d708 | 1078 | &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, |
5976c5f4 SH |
1079 | sizeof(key->tp.dst)))) |
1080 | goto nla_put_failure; | |
1081 | else if (key->basic.ip_proto == IPPROTO_SCTP && | |
1082 | (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, | |
1083 | &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, | |
1084 | sizeof(key->tp.src)) || | |
1085 | fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, | |
1086 | &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, | |
77b9900e JP |
1087 | sizeof(key->tp.dst)))) |
1088 | goto nla_put_failure; | |
7b684884 SH |
1089 | else if (key->basic.n_proto == htons(ETH_P_IP) && |
1090 | key->basic.ip_proto == IPPROTO_ICMP && | |
1091 | (fl_dump_key_val(skb, &key->icmp.type, | |
1092 | TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, | |
1093 | TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, | |
1094 | sizeof(key->icmp.type)) || | |
1095 | fl_dump_key_val(skb, &key->icmp.code, | |
1096 | TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, | |
1097 | TCA_FLOWER_KEY_ICMPV4_CODE_MASK, | |
1098 | sizeof(key->icmp.code)))) | |
1099 | goto nla_put_failure; | |
1100 | else if (key->basic.n_proto == htons(ETH_P_IPV6) && | |
1101 | key->basic.ip_proto == IPPROTO_ICMPV6 && | |
1102 | (fl_dump_key_val(skb, &key->icmp.type, | |
1103 | TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, | |
1104 | TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, | |
1105 | sizeof(key->icmp.type)) || | |
1106 | fl_dump_key_val(skb, &key->icmp.code, | |
1107 | TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, | |
1108 | TCA_FLOWER_KEY_ICMPV6_CODE_MASK, | |
1109 | sizeof(key->icmp.code)))) | |
1110 | goto nla_put_failure; | |
77b9900e | 1111 | |
bc3103f1 AV |
1112 | if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && |
1113 | (fl_dump_key_val(skb, &key->enc_ipv4.src, | |
1114 | TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, | |
1115 | TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, | |
1116 | sizeof(key->enc_ipv4.src)) || | |
1117 | fl_dump_key_val(skb, &key->enc_ipv4.dst, | |
1118 | TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, | |
1119 | TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, | |
1120 | sizeof(key->enc_ipv4.dst)))) | |
1121 | goto nla_put_failure; | |
1122 | else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && | |
1123 | (fl_dump_key_val(skb, &key->enc_ipv6.src, | |
1124 | TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, | |
1125 | TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, | |
1126 | sizeof(key->enc_ipv6.src)) || | |
1127 | fl_dump_key_val(skb, &key->enc_ipv6.dst, | |
1128 | TCA_FLOWER_KEY_ENC_IPV6_DST, | |
1129 | &mask->enc_ipv6.dst, | |
1130 | TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, | |
1131 | sizeof(key->enc_ipv6.dst)))) | |
1132 | goto nla_put_failure; | |
1133 | ||
1134 | if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, | |
eb523f42 | 1135 | &mask->enc_key_id, TCA_FLOWER_UNSPEC, |
f4d997fd HHZ |
1136 | sizeof(key->enc_key_id)) || |
1137 | fl_dump_key_val(skb, &key->enc_tp.src, | |
1138 | TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, | |
1139 | &mask->enc_tp.src, | |
1140 | TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, | |
1141 | sizeof(key->enc_tp.src)) || | |
1142 | fl_dump_key_val(skb, &key->enc_tp.dst, | |
1143 | TCA_FLOWER_KEY_ENC_UDP_DST_PORT, | |
1144 | &mask->enc_tp.dst, | |
1145 | TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, | |
1146 | sizeof(key->enc_tp.dst))) | |
bc3103f1 AV |
1147 | goto nla_put_failure; |
1148 | ||
faa3ffce OG |
1149 | if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) |
1150 | goto nla_put_failure; | |
1151 | ||
e69985c6 AV |
1152 | nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags); |
1153 | ||
77b9900e JP |
1154 | if (tcf_exts_dump(skb, &f->exts)) |
1155 | goto nla_put_failure; | |
1156 | ||
1157 | nla_nest_end(skb, nest); | |
1158 | ||
1159 | if (tcf_exts_dump_stats(skb, &f->exts) < 0) | |
1160 | goto nla_put_failure; | |
1161 | ||
1162 | return skb->len; | |
1163 | ||
1164 | nla_put_failure: | |
1165 | nla_nest_cancel(skb, nest); | |
1166 | return -1; | |
1167 | } | |
1168 | ||
1169 | static struct tcf_proto_ops cls_fl_ops __read_mostly = { | |
1170 | .kind = "flower", | |
1171 | .classify = fl_classify, | |
1172 | .init = fl_init, | |
1173 | .destroy = fl_destroy, | |
1174 | .get = fl_get, | |
1175 | .change = fl_change, | |
1176 | .delete = fl_delete, | |
1177 | .walk = fl_walk, | |
1178 | .dump = fl_dump, | |
1179 | .owner = THIS_MODULE, | |
1180 | }; | |
1181 | ||
1182 | static int __init cls_fl_init(void) | |
1183 | { | |
1184 | return register_tcf_proto_ops(&cls_fl_ops); | |
1185 | } | |
1186 | ||
1187 | static void __exit cls_fl_exit(void) | |
1188 | { | |
1189 | unregister_tcf_proto_ops(&cls_fl_ops); | |
1190 | } | |
1191 | ||
1192 | module_init(cls_fl_init); | |
1193 | module_exit(cls_fl_exit); | |
1194 | ||
1195 | MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); | |
1196 | MODULE_DESCRIPTION("Flower classifier"); | |
1197 | MODULE_LICENSE("GPL v2"); |