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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: | |
0df0f207 PB |
156 | skb_key.enc_control.addr_type = |
157 | FLOW_DISSECTOR_KEY_IPV4_ADDRS; | |
bc3103f1 AV |
158 | skb_key.enc_ipv4.src = key->u.ipv4.src; |
159 | skb_key.enc_ipv4.dst = key->u.ipv4.dst; | |
160 | break; | |
161 | case AF_INET6: | |
0df0f207 PB |
162 | skb_key.enc_control.addr_type = |
163 | FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
bc3103f1 AV |
164 | skb_key.enc_ipv6.src = key->u.ipv6.src; |
165 | skb_key.enc_ipv6.dst = key->u.ipv6.dst; | |
166 | break; | |
167 | } | |
168 | ||
169 | skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id); | |
f4d997fd HHZ |
170 | skb_key.enc_tp.src = key->tp_src; |
171 | skb_key.enc_tp.dst = key->tp_dst; | |
bc3103f1 AV |
172 | } |
173 | ||
77b9900e JP |
174 | skb_key.indev_ifindex = skb->skb_iif; |
175 | /* skb_flow_dissect() does not set n_proto in case an unknown protocol, | |
176 | * so do it rather here. | |
177 | */ | |
178 | skb_key.basic.n_proto = skb->protocol; | |
cd79a238 | 179 | skb_flow_dissect(skb, &head->dissector, &skb_key, 0); |
77b9900e JP |
180 | |
181 | fl_set_masked_key(&skb_mkey, &skb_key, &head->mask); | |
182 | ||
183 | f = rhashtable_lookup_fast(&head->ht, | |
184 | fl_key_get_start(&skb_mkey, &head->mask), | |
185 | head->ht_params); | |
e8eb36cd | 186 | if (f && !tc_skip_sw(f->flags)) { |
77b9900e JP |
187 | *res = f->res; |
188 | return tcf_exts_exec(skb, &f->exts, res); | |
189 | } | |
190 | return -1; | |
191 | } | |
192 | ||
193 | static int fl_init(struct tcf_proto *tp) | |
194 | { | |
195 | struct cls_fl_head *head; | |
196 | ||
197 | head = kzalloc(sizeof(*head), GFP_KERNEL); | |
198 | if (!head) | |
199 | return -ENOBUFS; | |
200 | ||
201 | INIT_LIST_HEAD_RCU(&head->filters); | |
202 | rcu_assign_pointer(tp->root, head); | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | static void fl_destroy_filter(struct rcu_head *head) | |
208 | { | |
209 | struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu); | |
210 | ||
211 | tcf_exts_destroy(&f->exts); | |
212 | kfree(f); | |
213 | } | |
214 | ||
3036dab6 | 215 | static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f) |
5b33f488 | 216 | { |
5b33f488 | 217 | struct tc_cls_flower_offload offload = {0}; |
7091d8c7 HHZ |
218 | struct net_device *dev = f->hw_dev; |
219 | struct tc_to_netdev *tc = &f->tc; | |
5b33f488 | 220 | |
79685219 | 221 | if (!tc_can_offload(dev, tp)) |
5b33f488 AV |
222 | return; |
223 | ||
224 | offload.command = TC_CLSFLOWER_DESTROY; | |
3036dab6 | 225 | offload.cookie = (unsigned long)f; |
5b33f488 | 226 | |
7091d8c7 HHZ |
227 | tc->type = TC_SETUP_CLSFLOWER; |
228 | tc->cls_flower = &offload; | |
5b33f488 | 229 | |
7091d8c7 | 230 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); |
5b33f488 AV |
231 | } |
232 | ||
e8eb36cd AV |
233 | static int fl_hw_replace_filter(struct tcf_proto *tp, |
234 | struct flow_dissector *dissector, | |
235 | struct fl_flow_key *mask, | |
3036dab6 | 236 | struct cls_fl_filter *f) |
5b33f488 AV |
237 | { |
238 | struct net_device *dev = tp->q->dev_queue->dev; | |
239 | struct tc_cls_flower_offload offload = {0}; | |
7091d8c7 | 240 | struct tc_to_netdev *tc = &f->tc; |
e8eb36cd | 241 | int err; |
5b33f488 | 242 | |
7091d8c7 | 243 | if (!tc_can_offload(dev, tp)) { |
a6e16931 HHZ |
244 | if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) || |
245 | (f->hw_dev && !tc_can_offload(f->hw_dev, tp))) { | |
246 | f->hw_dev = dev; | |
7091d8c7 | 247 | return tc_skip_sw(f->flags) ? -EINVAL : 0; |
a6e16931 | 248 | } |
7091d8c7 HHZ |
249 | dev = f->hw_dev; |
250 | tc->egress_dev = true; | |
251 | } else { | |
252 | f->hw_dev = dev; | |
253 | } | |
5b33f488 AV |
254 | |
255 | offload.command = TC_CLSFLOWER_REPLACE; | |
3036dab6 | 256 | offload.cookie = (unsigned long)f; |
5b33f488 AV |
257 | offload.dissector = dissector; |
258 | offload.mask = mask; | |
f93bd17b | 259 | offload.key = &f->mkey; |
3036dab6 | 260 | offload.exts = &f->exts; |
5b33f488 | 261 | |
7091d8c7 HHZ |
262 | tc->type = TC_SETUP_CLSFLOWER; |
263 | tc->cls_flower = &offload; | |
5b33f488 | 264 | |
5a7a5555 | 265 | err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, |
7091d8c7 | 266 | tc); |
e8eb36cd | 267 | |
3036dab6 | 268 | if (tc_skip_sw(f->flags)) |
e8eb36cd | 269 | return err; |
e8eb36cd | 270 | return 0; |
5b33f488 AV |
271 | } |
272 | ||
10cbc684 AV |
273 | static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) |
274 | { | |
10cbc684 | 275 | struct tc_cls_flower_offload offload = {0}; |
7091d8c7 HHZ |
276 | struct net_device *dev = f->hw_dev; |
277 | struct tc_to_netdev *tc = &f->tc; | |
10cbc684 | 278 | |
79685219 | 279 | if (!tc_can_offload(dev, tp)) |
10cbc684 AV |
280 | return; |
281 | ||
282 | offload.command = TC_CLSFLOWER_STATS; | |
283 | offload.cookie = (unsigned long)f; | |
284 | offload.exts = &f->exts; | |
285 | ||
7091d8c7 HHZ |
286 | tc->type = TC_SETUP_CLSFLOWER; |
287 | tc->cls_flower = &offload; | |
10cbc684 | 288 | |
7091d8c7 | 289 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); |
10cbc684 AV |
290 | } |
291 | ||
13fa876e RD |
292 | static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f) |
293 | { | |
294 | list_del_rcu(&f->list); | |
79685219 | 295 | if (!tc_skip_hw(f->flags)) |
3036dab6 | 296 | fl_hw_destroy_filter(tp, f); |
13fa876e RD |
297 | tcf_unbind_filter(tp, &f->res); |
298 | call_rcu(&f->rcu, fl_destroy_filter); | |
299 | } | |
300 | ||
d9363774 DB |
301 | static void fl_destroy_sleepable(struct work_struct *work) |
302 | { | |
303 | struct cls_fl_head *head = container_of(work, struct cls_fl_head, | |
304 | work); | |
305 | if (head->mask_assigned) | |
306 | rhashtable_destroy(&head->ht); | |
307 | kfree(head); | |
308 | module_put(THIS_MODULE); | |
309 | } | |
310 | ||
311 | static void fl_destroy_rcu(struct rcu_head *rcu) | |
312 | { | |
313 | struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu); | |
314 | ||
315 | INIT_WORK(&head->work, fl_destroy_sleepable); | |
316 | schedule_work(&head->work); | |
317 | } | |
318 | ||
77b9900e JP |
319 | static bool fl_destroy(struct tcf_proto *tp, bool force) |
320 | { | |
321 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
322 | struct cls_fl_filter *f, *next; | |
323 | ||
324 | if (!force && !list_empty(&head->filters)) | |
325 | return false; | |
326 | ||
13fa876e RD |
327 | list_for_each_entry_safe(f, next, &head->filters, list) |
328 | __fl_delete(tp, f); | |
d9363774 DB |
329 | |
330 | __module_get(THIS_MODULE); | |
331 | call_rcu(&head->rcu, fl_destroy_rcu); | |
2745529a | 332 | |
77b9900e JP |
333 | return true; |
334 | } | |
335 | ||
336 | static unsigned long fl_get(struct tcf_proto *tp, u32 handle) | |
337 | { | |
338 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
339 | struct cls_fl_filter *f; | |
340 | ||
341 | list_for_each_entry(f, &head->filters, list) | |
342 | if (f->handle == handle) | |
343 | return (unsigned long) f; | |
344 | return 0; | |
345 | } | |
346 | ||
347 | static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { | |
348 | [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, | |
349 | [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, | |
350 | [TCA_FLOWER_INDEV] = { .type = NLA_STRING, | |
351 | .len = IFNAMSIZ }, | |
352 | [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, | |
353 | [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, | |
354 | [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, | |
355 | [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, | |
356 | [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, | |
357 | [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, | |
358 | [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, | |
359 | [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, | |
360 | [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, | |
361 | [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, | |
362 | [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, | |
363 | [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, | |
364 | [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, | |
365 | [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, | |
366 | [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, | |
367 | [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, | |
b175c3a4 JHS |
368 | [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, |
369 | [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, | |
9399ae9a HHZ |
370 | [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, |
371 | [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, | |
372 | [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, | |
bc3103f1 AV |
373 | [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, |
374 | [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, | |
375 | [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, | |
376 | [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, | |
377 | [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, | |
378 | [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, | |
379 | [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, | |
380 | [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, | |
381 | [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, | |
aa72d708 OG |
382 | [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, |
383 | [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, | |
384 | [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, | |
385 | [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, | |
5976c5f4 SH |
386 | [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, |
387 | [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, | |
388 | [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, | |
389 | [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, | |
f4d997fd HHZ |
390 | [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, |
391 | [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, | |
392 | [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, | |
393 | [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, | |
faa3ffce OG |
394 | [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, |
395 | [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, | |
7b684884 SH |
396 | [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, |
397 | [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, | |
398 | [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, | |
399 | [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, | |
400 | [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, | |
401 | [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, | |
402 | [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, | |
403 | [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, | |
77b9900e JP |
404 | }; |
405 | ||
406 | static void fl_set_key_val(struct nlattr **tb, | |
407 | void *val, int val_type, | |
408 | void *mask, int mask_type, int len) | |
409 | { | |
410 | if (!tb[val_type]) | |
411 | return; | |
412 | memcpy(val, nla_data(tb[val_type]), len); | |
413 | if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) | |
414 | memset(mask, 0xff, len); | |
415 | else | |
416 | memcpy(mask, nla_data(tb[mask_type]), len); | |
417 | } | |
418 | ||
9399ae9a HHZ |
419 | static void fl_set_key_vlan(struct nlattr **tb, |
420 | struct flow_dissector_key_vlan *key_val, | |
421 | struct flow_dissector_key_vlan *key_mask) | |
422 | { | |
423 | #define VLAN_PRIORITY_MASK 0x7 | |
424 | ||
425 | if (tb[TCA_FLOWER_KEY_VLAN_ID]) { | |
426 | key_val->vlan_id = | |
427 | nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK; | |
428 | key_mask->vlan_id = VLAN_VID_MASK; | |
429 | } | |
430 | if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) { | |
431 | key_val->vlan_priority = | |
432 | nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) & | |
433 | VLAN_PRIORITY_MASK; | |
434 | key_mask->vlan_priority = VLAN_PRIORITY_MASK; | |
435 | } | |
436 | } | |
437 | ||
faa3ffce OG |
438 | static void fl_set_key_flag(u32 flower_key, u32 flower_mask, |
439 | u32 *dissector_key, u32 *dissector_mask, | |
440 | u32 flower_flag_bit, u32 dissector_flag_bit) | |
441 | { | |
442 | if (flower_mask & flower_flag_bit) { | |
443 | *dissector_mask |= dissector_flag_bit; | |
444 | if (flower_key & flower_flag_bit) | |
445 | *dissector_key |= dissector_flag_bit; | |
446 | } | |
447 | } | |
448 | ||
d9724772 OG |
449 | static int fl_set_key_flags(struct nlattr **tb, |
450 | u32 *flags_key, u32 *flags_mask) | |
faa3ffce OG |
451 | { |
452 | u32 key, mask; | |
453 | ||
d9724772 OG |
454 | /* mask is mandatory for flags */ |
455 | if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) | |
456 | return -EINVAL; | |
faa3ffce OG |
457 | |
458 | key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); | |
d9724772 | 459 | mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); |
faa3ffce OG |
460 | |
461 | *flags_key = 0; | |
462 | *flags_mask = 0; | |
463 | ||
464 | fl_set_key_flag(key, mask, flags_key, flags_mask, | |
465 | TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); | |
d9724772 OG |
466 | |
467 | return 0; | |
faa3ffce OG |
468 | } |
469 | ||
77b9900e JP |
470 | static int fl_set_key(struct net *net, struct nlattr **tb, |
471 | struct fl_flow_key *key, struct fl_flow_key *mask) | |
472 | { | |
9399ae9a | 473 | __be16 ethertype; |
d9724772 | 474 | int ret = 0; |
dd3aa3b5 | 475 | #ifdef CONFIG_NET_CLS_IND |
77b9900e | 476 | if (tb[TCA_FLOWER_INDEV]) { |
dd3aa3b5 | 477 | int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]); |
77b9900e JP |
478 | if (err < 0) |
479 | return err; | |
480 | key->indev_ifindex = err; | |
481 | mask->indev_ifindex = 0xffffffff; | |
482 | } | |
dd3aa3b5 | 483 | #endif |
77b9900e JP |
484 | |
485 | fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, | |
486 | mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, | |
487 | sizeof(key->eth.dst)); | |
488 | fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, | |
489 | mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, | |
490 | sizeof(key->eth.src)); | |
66530bdf | 491 | |
0b498a52 | 492 | if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { |
9399ae9a HHZ |
493 | ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); |
494 | ||
0b498a52 AB |
495 | if (ethertype == htons(ETH_P_8021Q)) { |
496 | fl_set_key_vlan(tb, &key->vlan, &mask->vlan); | |
497 | fl_set_key_val(tb, &key->basic.n_proto, | |
498 | TCA_FLOWER_KEY_VLAN_ETH_TYPE, | |
499 | &mask->basic.n_proto, TCA_FLOWER_UNSPEC, | |
500 | sizeof(key->basic.n_proto)); | |
501 | } else { | |
502 | key->basic.n_proto = ethertype; | |
503 | mask->basic.n_proto = cpu_to_be16(~0); | |
504 | } | |
9399ae9a | 505 | } |
66530bdf | 506 | |
77b9900e JP |
507 | if (key->basic.n_proto == htons(ETH_P_IP) || |
508 | key->basic.n_proto == htons(ETH_P_IPV6)) { | |
509 | fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, | |
510 | &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, | |
511 | sizeof(key->basic.ip_proto)); | |
512 | } | |
66530bdf JHS |
513 | |
514 | if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { | |
515 | key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; | |
970bfcd0 | 516 | mask->control.addr_type = ~0; |
77b9900e JP |
517 | fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, |
518 | &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, | |
519 | sizeof(key->ipv4.src)); | |
520 | fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, | |
521 | &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, | |
522 | sizeof(key->ipv4.dst)); | |
66530bdf JHS |
523 | } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { |
524 | key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
970bfcd0 | 525 | mask->control.addr_type = ~0; |
77b9900e JP |
526 | fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, |
527 | &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, | |
528 | sizeof(key->ipv6.src)); | |
529 | fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, | |
530 | &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, | |
531 | sizeof(key->ipv6.dst)); | |
532 | } | |
66530bdf | 533 | |
77b9900e JP |
534 | if (key->basic.ip_proto == IPPROTO_TCP) { |
535 | fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, | |
aa72d708 | 536 | &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, |
77b9900e JP |
537 | sizeof(key->tp.src)); |
538 | fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, | |
aa72d708 | 539 | &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, |
77b9900e JP |
540 | sizeof(key->tp.dst)); |
541 | } else if (key->basic.ip_proto == IPPROTO_UDP) { | |
542 | fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, | |
aa72d708 | 543 | &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, |
77b9900e JP |
544 | sizeof(key->tp.src)); |
545 | fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, | |
aa72d708 | 546 | &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, |
77b9900e | 547 | sizeof(key->tp.dst)); |
5976c5f4 SH |
548 | } else if (key->basic.ip_proto == IPPROTO_SCTP) { |
549 | fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, | |
550 | &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, | |
551 | sizeof(key->tp.src)); | |
552 | fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, | |
553 | &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, | |
554 | sizeof(key->tp.dst)); | |
7b684884 SH |
555 | } else if (key->basic.n_proto == htons(ETH_P_IP) && |
556 | key->basic.ip_proto == IPPROTO_ICMP) { | |
557 | fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, | |
558 | &mask->icmp.type, | |
559 | TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, | |
560 | sizeof(key->icmp.type)); | |
561 | fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, | |
562 | &mask->icmp.code, | |
563 | TCA_FLOWER_KEY_ICMPV4_CODE_MASK, | |
564 | sizeof(key->icmp.code)); | |
565 | } else if (key->basic.n_proto == htons(ETH_P_IPV6) && | |
566 | key->basic.ip_proto == IPPROTO_ICMPV6) { | |
567 | fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, | |
568 | &mask->icmp.type, | |
569 | TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, | |
570 | sizeof(key->icmp.type)); | |
571 | fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, | |
572 | &mask->icmp.code, | |
573 | TCA_FLOWER_KEY_ICMPV4_CODE_MASK, | |
574 | sizeof(key->icmp.code)); | |
77b9900e JP |
575 | } |
576 | ||
bc3103f1 AV |
577 | if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || |
578 | tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { | |
579 | key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; | |
970bfcd0 | 580 | mask->enc_control.addr_type = ~0; |
bc3103f1 AV |
581 | fl_set_key_val(tb, &key->enc_ipv4.src, |
582 | TCA_FLOWER_KEY_ENC_IPV4_SRC, | |
583 | &mask->enc_ipv4.src, | |
584 | TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, | |
585 | sizeof(key->enc_ipv4.src)); | |
586 | fl_set_key_val(tb, &key->enc_ipv4.dst, | |
587 | TCA_FLOWER_KEY_ENC_IPV4_DST, | |
588 | &mask->enc_ipv4.dst, | |
589 | TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, | |
590 | sizeof(key->enc_ipv4.dst)); | |
591 | } | |
592 | ||
593 | if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || | |
594 | tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { | |
595 | key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
970bfcd0 | 596 | mask->enc_control.addr_type = ~0; |
bc3103f1 AV |
597 | fl_set_key_val(tb, &key->enc_ipv6.src, |
598 | TCA_FLOWER_KEY_ENC_IPV6_SRC, | |
599 | &mask->enc_ipv6.src, | |
600 | TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, | |
601 | sizeof(key->enc_ipv6.src)); | |
602 | fl_set_key_val(tb, &key->enc_ipv6.dst, | |
603 | TCA_FLOWER_KEY_ENC_IPV6_DST, | |
604 | &mask->enc_ipv6.dst, | |
605 | TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, | |
606 | sizeof(key->enc_ipv6.dst)); | |
607 | } | |
608 | ||
609 | fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, | |
eb523f42 | 610 | &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, |
bc3103f1 AV |
611 | sizeof(key->enc_key_id.keyid)); |
612 | ||
f4d997fd HHZ |
613 | fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, |
614 | &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, | |
615 | sizeof(key->enc_tp.src)); | |
616 | ||
617 | fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, | |
618 | &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, | |
619 | sizeof(key->enc_tp.dst)); | |
620 | ||
d9724772 OG |
621 | if (tb[TCA_FLOWER_KEY_FLAGS]) |
622 | ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); | |
faa3ffce | 623 | |
d9724772 | 624 | return ret; |
77b9900e JP |
625 | } |
626 | ||
627 | static bool fl_mask_eq(struct fl_flow_mask *mask1, | |
628 | struct fl_flow_mask *mask2) | |
629 | { | |
630 | const long *lmask1 = fl_key_get_start(&mask1->key, mask1); | |
631 | const long *lmask2 = fl_key_get_start(&mask2->key, mask2); | |
632 | ||
633 | return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) && | |
634 | !memcmp(lmask1, lmask2, fl_mask_range(mask1)); | |
635 | } | |
636 | ||
637 | static const struct rhashtable_params fl_ht_params = { | |
638 | .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ | |
639 | .head_offset = offsetof(struct cls_fl_filter, ht_node), | |
640 | .automatic_shrinking = true, | |
641 | }; | |
642 | ||
643 | static int fl_init_hashtable(struct cls_fl_head *head, | |
644 | struct fl_flow_mask *mask) | |
645 | { | |
646 | head->ht_params = fl_ht_params; | |
647 | head->ht_params.key_len = fl_mask_range(mask); | |
648 | head->ht_params.key_offset += mask->range.start; | |
649 | ||
650 | return rhashtable_init(&head->ht, &head->ht_params); | |
651 | } | |
652 | ||
653 | #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) | |
654 | #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) | |
77b9900e | 655 | |
339ba878 HHZ |
656 | #define FL_KEY_IS_MASKED(mask, member) \ |
657 | memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ | |
658 | 0, FL_KEY_MEMBER_SIZE(member)) \ | |
77b9900e JP |
659 | |
660 | #define FL_KEY_SET(keys, cnt, id, member) \ | |
661 | do { \ | |
662 | keys[cnt].key_id = id; \ | |
663 | keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ | |
664 | cnt++; \ | |
665 | } while(0); | |
666 | ||
339ba878 | 667 | #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ |
77b9900e | 668 | do { \ |
339ba878 | 669 | if (FL_KEY_IS_MASKED(mask, member)) \ |
77b9900e JP |
670 | FL_KEY_SET(keys, cnt, id, member); \ |
671 | } while(0); | |
672 | ||
673 | static void fl_init_dissector(struct cls_fl_head *head, | |
674 | struct fl_flow_mask *mask) | |
675 | { | |
676 | struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; | |
677 | size_t cnt = 0; | |
678 | ||
42aecaa9 | 679 | FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); |
77b9900e | 680 | FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); |
339ba878 HHZ |
681 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
682 | FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); | |
683 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
684 | FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); | |
685 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
686 | FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); | |
687 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
688 | FLOW_DISSECTOR_KEY_PORTS, tp); | |
7b684884 SH |
689 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
690 | FLOW_DISSECTOR_KEY_ICMP, icmp); | |
9399ae9a HHZ |
691 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
692 | FLOW_DISSECTOR_KEY_VLAN, vlan); | |
519d1052 HHZ |
693 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
694 | FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); | |
695 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
696 | FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); | |
697 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
698 | FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); | |
699 | if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) || | |
700 | FL_KEY_IS_MASKED(&mask->key, enc_ipv6)) | |
701 | FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, | |
702 | enc_control); | |
f4d997fd HHZ |
703 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
704 | FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); | |
77b9900e JP |
705 | |
706 | skb_flow_dissector_init(&head->dissector, keys, cnt); | |
707 | } | |
708 | ||
709 | static int fl_check_assign_mask(struct cls_fl_head *head, | |
710 | struct fl_flow_mask *mask) | |
711 | { | |
712 | int err; | |
713 | ||
714 | if (head->mask_assigned) { | |
715 | if (!fl_mask_eq(&head->mask, mask)) | |
716 | return -EINVAL; | |
717 | else | |
718 | return 0; | |
719 | } | |
720 | ||
721 | /* Mask is not assigned yet. So assign it and init hashtable | |
722 | * according to that. | |
723 | */ | |
724 | err = fl_init_hashtable(head, mask); | |
725 | if (err) | |
726 | return err; | |
727 | memcpy(&head->mask, mask, sizeof(head->mask)); | |
728 | head->mask_assigned = true; | |
729 | ||
730 | fl_init_dissector(head, mask); | |
731 | ||
732 | return 0; | |
733 | } | |
734 | ||
735 | static int fl_set_parms(struct net *net, struct tcf_proto *tp, | |
736 | struct cls_fl_filter *f, struct fl_flow_mask *mask, | |
737 | unsigned long base, struct nlattr **tb, | |
738 | struct nlattr *est, bool ovr) | |
739 | { | |
740 | struct tcf_exts e; | |
741 | int err; | |
742 | ||
b9a24bb7 | 743 | err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0); |
77b9900e JP |
744 | if (err < 0) |
745 | return err; | |
b9a24bb7 WC |
746 | err = tcf_exts_validate(net, tp, tb, est, &e, ovr); |
747 | if (err < 0) | |
748 | goto errout; | |
77b9900e JP |
749 | |
750 | if (tb[TCA_FLOWER_CLASSID]) { | |
751 | f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); | |
752 | tcf_bind_filter(tp, &f->res, base); | |
753 | } | |
754 | ||
755 | err = fl_set_key(net, tb, &f->key, &mask->key); | |
756 | if (err) | |
757 | goto errout; | |
758 | ||
759 | fl_mask_update_range(mask); | |
760 | fl_set_masked_key(&f->mkey, &f->key, mask); | |
761 | ||
762 | tcf_exts_change(tp, &f->exts, &e); | |
763 | ||
764 | return 0; | |
765 | errout: | |
766 | tcf_exts_destroy(&e); | |
767 | return err; | |
768 | } | |
769 | ||
770 | static u32 fl_grab_new_handle(struct tcf_proto *tp, | |
771 | struct cls_fl_head *head) | |
772 | { | |
773 | unsigned int i = 0x80000000; | |
774 | u32 handle; | |
775 | ||
776 | do { | |
777 | if (++head->hgen == 0x7FFFFFFF) | |
778 | head->hgen = 1; | |
779 | } while (--i > 0 && fl_get(tp, head->hgen)); | |
780 | ||
781 | if (unlikely(i == 0)) { | |
782 | pr_err("Insufficient number of handles\n"); | |
783 | handle = 0; | |
784 | } else { | |
785 | handle = head->hgen; | |
786 | } | |
787 | ||
788 | return handle; | |
789 | } | |
790 | ||
791 | static int fl_change(struct net *net, struct sk_buff *in_skb, | |
792 | struct tcf_proto *tp, unsigned long base, | |
793 | u32 handle, struct nlattr **tca, | |
794 | unsigned long *arg, bool ovr) | |
795 | { | |
796 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
797 | struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg; | |
798 | struct cls_fl_filter *fnew; | |
799 | struct nlattr *tb[TCA_FLOWER_MAX + 1]; | |
800 | struct fl_flow_mask mask = {}; | |
801 | int err; | |
802 | ||
803 | if (!tca[TCA_OPTIONS]) | |
804 | return -EINVAL; | |
805 | ||
806 | err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], fl_policy); | |
807 | if (err < 0) | |
808 | return err; | |
809 | ||
810 | if (fold && handle && fold->handle != handle) | |
811 | return -EINVAL; | |
812 | ||
813 | fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); | |
814 | if (!fnew) | |
815 | return -ENOBUFS; | |
816 | ||
b9a24bb7 WC |
817 | err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); |
818 | if (err < 0) | |
819 | goto errout; | |
77b9900e JP |
820 | |
821 | if (!handle) { | |
822 | handle = fl_grab_new_handle(tp, head); | |
823 | if (!handle) { | |
824 | err = -EINVAL; | |
825 | goto errout; | |
826 | } | |
827 | } | |
828 | fnew->handle = handle; | |
829 | ||
e69985c6 AV |
830 | if (tb[TCA_FLOWER_FLAGS]) { |
831 | fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); | |
832 | ||
833 | if (!tc_flags_valid(fnew->flags)) { | |
834 | err = -EINVAL; | |
835 | goto errout; | |
836 | } | |
837 | } | |
5b33f488 | 838 | |
77b9900e JP |
839 | err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr); |
840 | if (err) | |
841 | goto errout; | |
842 | ||
843 | err = fl_check_assign_mask(head, &mask); | |
844 | if (err) | |
845 | goto errout; | |
846 | ||
e8eb36cd | 847 | if (!tc_skip_sw(fnew->flags)) { |
e69985c6 AV |
848 | err = rhashtable_insert_fast(&head->ht, &fnew->ht_node, |
849 | head->ht_params); | |
850 | if (err) | |
851 | goto errout; | |
852 | } | |
5b33f488 | 853 | |
79685219 HHZ |
854 | if (!tc_skip_hw(fnew->flags)) { |
855 | err = fl_hw_replace_filter(tp, | |
856 | &head->dissector, | |
857 | &mask.key, | |
3036dab6 | 858 | fnew); |
79685219 HHZ |
859 | if (err) |
860 | goto errout; | |
861 | } | |
5b33f488 AV |
862 | |
863 | if (fold) { | |
725cbb62 JP |
864 | if (!tc_skip_sw(fold->flags)) |
865 | rhashtable_remove_fast(&head->ht, &fold->ht_node, | |
866 | head->ht_params); | |
79685219 | 867 | if (!tc_skip_hw(fold->flags)) |
3036dab6 | 868 | fl_hw_destroy_filter(tp, fold); |
5b33f488 | 869 | } |
77b9900e JP |
870 | |
871 | *arg = (unsigned long) fnew; | |
872 | ||
873 | if (fold) { | |
ff3532f2 | 874 | list_replace_rcu(&fold->list, &fnew->list); |
77b9900e JP |
875 | tcf_unbind_filter(tp, &fold->res); |
876 | call_rcu(&fold->rcu, fl_destroy_filter); | |
877 | } else { | |
878 | list_add_tail_rcu(&fnew->list, &head->filters); | |
879 | } | |
880 | ||
881 | return 0; | |
882 | ||
883 | errout: | |
b9a24bb7 | 884 | tcf_exts_destroy(&fnew->exts); |
77b9900e JP |
885 | kfree(fnew); |
886 | return err; | |
887 | } | |
888 | ||
889 | static int fl_delete(struct tcf_proto *tp, unsigned long arg) | |
890 | { | |
891 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
892 | struct cls_fl_filter *f = (struct cls_fl_filter *) arg; | |
893 | ||
725cbb62 JP |
894 | if (!tc_skip_sw(f->flags)) |
895 | rhashtable_remove_fast(&head->ht, &f->ht_node, | |
896 | head->ht_params); | |
13fa876e | 897 | __fl_delete(tp, f); |
77b9900e JP |
898 | return 0; |
899 | } | |
900 | ||
901 | static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) | |
902 | { | |
903 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
904 | struct cls_fl_filter *f; | |
905 | ||
906 | list_for_each_entry_rcu(f, &head->filters, list) { | |
907 | if (arg->count < arg->skip) | |
908 | goto skip; | |
909 | if (arg->fn(tp, (unsigned long) f, arg) < 0) { | |
910 | arg->stop = 1; | |
911 | break; | |
912 | } | |
913 | skip: | |
914 | arg->count++; | |
915 | } | |
916 | } | |
917 | ||
918 | static int fl_dump_key_val(struct sk_buff *skb, | |
919 | void *val, int val_type, | |
920 | void *mask, int mask_type, int len) | |
921 | { | |
922 | int err; | |
923 | ||
924 | if (!memchr_inv(mask, 0, len)) | |
925 | return 0; | |
926 | err = nla_put(skb, val_type, len, val); | |
927 | if (err) | |
928 | return err; | |
929 | if (mask_type != TCA_FLOWER_UNSPEC) { | |
930 | err = nla_put(skb, mask_type, len, mask); | |
931 | if (err) | |
932 | return err; | |
933 | } | |
934 | return 0; | |
935 | } | |
936 | ||
9399ae9a HHZ |
937 | static int fl_dump_key_vlan(struct sk_buff *skb, |
938 | struct flow_dissector_key_vlan *vlan_key, | |
939 | struct flow_dissector_key_vlan *vlan_mask) | |
940 | { | |
941 | int err; | |
942 | ||
943 | if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) | |
944 | return 0; | |
945 | if (vlan_mask->vlan_id) { | |
946 | err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID, | |
947 | vlan_key->vlan_id); | |
948 | if (err) | |
949 | return err; | |
950 | } | |
951 | if (vlan_mask->vlan_priority) { | |
952 | err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO, | |
953 | vlan_key->vlan_priority); | |
954 | if (err) | |
955 | return err; | |
956 | } | |
957 | return 0; | |
958 | } | |
959 | ||
faa3ffce OG |
960 | static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, |
961 | u32 *flower_key, u32 *flower_mask, | |
962 | u32 flower_flag_bit, u32 dissector_flag_bit) | |
963 | { | |
964 | if (dissector_mask & dissector_flag_bit) { | |
965 | *flower_mask |= flower_flag_bit; | |
966 | if (dissector_key & dissector_flag_bit) | |
967 | *flower_key |= flower_flag_bit; | |
968 | } | |
969 | } | |
970 | ||
971 | static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) | |
972 | { | |
973 | u32 key, mask; | |
974 | __be32 _key, _mask; | |
975 | int err; | |
976 | ||
977 | if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) | |
978 | return 0; | |
979 | ||
980 | key = 0; | |
981 | mask = 0; | |
982 | ||
983 | fl_get_key_flag(flags_key, flags_mask, &key, &mask, | |
984 | TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); | |
985 | ||
986 | _key = cpu_to_be32(key); | |
987 | _mask = cpu_to_be32(mask); | |
988 | ||
989 | err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); | |
990 | if (err) | |
991 | return err; | |
992 | ||
993 | return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); | |
994 | } | |
995 | ||
77b9900e JP |
996 | static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, |
997 | struct sk_buff *skb, struct tcmsg *t) | |
998 | { | |
999 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
1000 | struct cls_fl_filter *f = (struct cls_fl_filter *) fh; | |
1001 | struct nlattr *nest; | |
1002 | struct fl_flow_key *key, *mask; | |
1003 | ||
1004 | if (!f) | |
1005 | return skb->len; | |
1006 | ||
1007 | t->tcm_handle = f->handle; | |
1008 | ||
1009 | nest = nla_nest_start(skb, TCA_OPTIONS); | |
1010 | if (!nest) | |
1011 | goto nla_put_failure; | |
1012 | ||
1013 | if (f->res.classid && | |
1014 | nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) | |
1015 | goto nla_put_failure; | |
1016 | ||
1017 | key = &f->key; | |
1018 | mask = &head->mask.key; | |
1019 | ||
1020 | if (mask->indev_ifindex) { | |
1021 | struct net_device *dev; | |
1022 | ||
1023 | dev = __dev_get_by_index(net, key->indev_ifindex); | |
1024 | if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) | |
1025 | goto nla_put_failure; | |
1026 | } | |
1027 | ||
79685219 HHZ |
1028 | if (!tc_skip_hw(f->flags)) |
1029 | fl_hw_update_stats(tp, f); | |
10cbc684 | 1030 | |
77b9900e JP |
1031 | if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, |
1032 | mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, | |
1033 | sizeof(key->eth.dst)) || | |
1034 | fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, | |
1035 | mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, | |
1036 | sizeof(key->eth.src)) || | |
1037 | fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, | |
1038 | &mask->basic.n_proto, TCA_FLOWER_UNSPEC, | |
1039 | sizeof(key->basic.n_proto))) | |
1040 | goto nla_put_failure; | |
9399ae9a HHZ |
1041 | |
1042 | if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan)) | |
1043 | goto nla_put_failure; | |
1044 | ||
77b9900e JP |
1045 | if ((key->basic.n_proto == htons(ETH_P_IP) || |
1046 | key->basic.n_proto == htons(ETH_P_IPV6)) && | |
1047 | fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, | |
1048 | &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, | |
1049 | sizeof(key->basic.ip_proto))) | |
1050 | goto nla_put_failure; | |
1051 | ||
c3f83241 | 1052 | if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && |
77b9900e JP |
1053 | (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, |
1054 | &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, | |
1055 | sizeof(key->ipv4.src)) || | |
1056 | fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, | |
1057 | &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, | |
1058 | sizeof(key->ipv4.dst)))) | |
1059 | goto nla_put_failure; | |
c3f83241 | 1060 | else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && |
77b9900e JP |
1061 | (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, |
1062 | &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, | |
1063 | sizeof(key->ipv6.src)) || | |
1064 | fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, | |
1065 | &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, | |
1066 | sizeof(key->ipv6.dst)))) | |
1067 | goto nla_put_failure; | |
1068 | ||
1069 | if (key->basic.ip_proto == IPPROTO_TCP && | |
1070 | (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, | |
aa72d708 | 1071 | &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, |
77b9900e JP |
1072 | sizeof(key->tp.src)) || |
1073 | fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, | |
aa72d708 | 1074 | &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, |
77b9900e JP |
1075 | sizeof(key->tp.dst)))) |
1076 | goto nla_put_failure; | |
1077 | else if (key->basic.ip_proto == IPPROTO_UDP && | |
1078 | (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, | |
aa72d708 | 1079 | &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, |
77b9900e JP |
1080 | sizeof(key->tp.src)) || |
1081 | fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, | |
aa72d708 | 1082 | &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, |
5976c5f4 SH |
1083 | sizeof(key->tp.dst)))) |
1084 | goto nla_put_failure; | |
1085 | else if (key->basic.ip_proto == IPPROTO_SCTP && | |
1086 | (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, | |
1087 | &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, | |
1088 | sizeof(key->tp.src)) || | |
1089 | fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, | |
1090 | &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, | |
77b9900e JP |
1091 | sizeof(key->tp.dst)))) |
1092 | goto nla_put_failure; | |
7b684884 SH |
1093 | else if (key->basic.n_proto == htons(ETH_P_IP) && |
1094 | key->basic.ip_proto == IPPROTO_ICMP && | |
1095 | (fl_dump_key_val(skb, &key->icmp.type, | |
1096 | TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, | |
1097 | TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, | |
1098 | sizeof(key->icmp.type)) || | |
1099 | fl_dump_key_val(skb, &key->icmp.code, | |
1100 | TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, | |
1101 | TCA_FLOWER_KEY_ICMPV4_CODE_MASK, | |
1102 | sizeof(key->icmp.code)))) | |
1103 | goto nla_put_failure; | |
1104 | else if (key->basic.n_proto == htons(ETH_P_IPV6) && | |
1105 | key->basic.ip_proto == IPPROTO_ICMPV6 && | |
1106 | (fl_dump_key_val(skb, &key->icmp.type, | |
1107 | TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, | |
1108 | TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, | |
1109 | sizeof(key->icmp.type)) || | |
1110 | fl_dump_key_val(skb, &key->icmp.code, | |
1111 | TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, | |
1112 | TCA_FLOWER_KEY_ICMPV6_CODE_MASK, | |
1113 | sizeof(key->icmp.code)))) | |
1114 | goto nla_put_failure; | |
77b9900e | 1115 | |
bc3103f1 AV |
1116 | if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && |
1117 | (fl_dump_key_val(skb, &key->enc_ipv4.src, | |
1118 | TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, | |
1119 | TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, | |
1120 | sizeof(key->enc_ipv4.src)) || | |
1121 | fl_dump_key_val(skb, &key->enc_ipv4.dst, | |
1122 | TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, | |
1123 | TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, | |
1124 | sizeof(key->enc_ipv4.dst)))) | |
1125 | goto nla_put_failure; | |
1126 | else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && | |
1127 | (fl_dump_key_val(skb, &key->enc_ipv6.src, | |
1128 | TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, | |
1129 | TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, | |
1130 | sizeof(key->enc_ipv6.src)) || | |
1131 | fl_dump_key_val(skb, &key->enc_ipv6.dst, | |
1132 | TCA_FLOWER_KEY_ENC_IPV6_DST, | |
1133 | &mask->enc_ipv6.dst, | |
1134 | TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, | |
1135 | sizeof(key->enc_ipv6.dst)))) | |
1136 | goto nla_put_failure; | |
1137 | ||
1138 | if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, | |
eb523f42 | 1139 | &mask->enc_key_id, TCA_FLOWER_UNSPEC, |
f4d997fd HHZ |
1140 | sizeof(key->enc_key_id)) || |
1141 | fl_dump_key_val(skb, &key->enc_tp.src, | |
1142 | TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, | |
1143 | &mask->enc_tp.src, | |
1144 | TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, | |
1145 | sizeof(key->enc_tp.src)) || | |
1146 | fl_dump_key_val(skb, &key->enc_tp.dst, | |
1147 | TCA_FLOWER_KEY_ENC_UDP_DST_PORT, | |
1148 | &mask->enc_tp.dst, | |
1149 | TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, | |
1150 | sizeof(key->enc_tp.dst))) | |
bc3103f1 AV |
1151 | goto nla_put_failure; |
1152 | ||
faa3ffce OG |
1153 | if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) |
1154 | goto nla_put_failure; | |
1155 | ||
e69985c6 AV |
1156 | nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags); |
1157 | ||
77b9900e JP |
1158 | if (tcf_exts_dump(skb, &f->exts)) |
1159 | goto nla_put_failure; | |
1160 | ||
1161 | nla_nest_end(skb, nest); | |
1162 | ||
1163 | if (tcf_exts_dump_stats(skb, &f->exts) < 0) | |
1164 | goto nla_put_failure; | |
1165 | ||
1166 | return skb->len; | |
1167 | ||
1168 | nla_put_failure: | |
1169 | nla_nest_cancel(skb, nest); | |
1170 | return -1; | |
1171 | } | |
1172 | ||
1173 | static struct tcf_proto_ops cls_fl_ops __read_mostly = { | |
1174 | .kind = "flower", | |
1175 | .classify = fl_classify, | |
1176 | .init = fl_init, | |
1177 | .destroy = fl_destroy, | |
1178 | .get = fl_get, | |
1179 | .change = fl_change, | |
1180 | .delete = fl_delete, | |
1181 | .walk = fl_walk, | |
1182 | .dump = fl_dump, | |
1183 | .owner = THIS_MODULE, | |
1184 | }; | |
1185 | ||
1186 | static int __init cls_fl_init(void) | |
1187 | { | |
1188 | return register_tcf_proto_ops(&cls_fl_ops); | |
1189 | } | |
1190 | ||
1191 | static void __exit cls_fl_exit(void) | |
1192 | { | |
1193 | unregister_tcf_proto_ops(&cls_fl_ops); | |
1194 | } | |
1195 | ||
1196 | module_init(cls_fl_init); | |
1197 | module_exit(cls_fl_exit); | |
1198 | ||
1199 | MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); | |
1200 | MODULE_DESCRIPTION("Flower classifier"); | |
1201 | MODULE_LICENSE("GPL v2"); |