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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; |
99d31326 | 43 | struct flow_dissector_key_arp arp; |
bc3103f1 AV |
44 | struct flow_dissector_key_keyid enc_key_id; |
45 | union { | |
46 | struct flow_dissector_key_ipv4_addrs enc_ipv4; | |
47 | struct flow_dissector_key_ipv6_addrs enc_ipv6; | |
48 | }; | |
f4d997fd | 49 | struct flow_dissector_key_ports enc_tp; |
77b9900e JP |
50 | } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ |
51 | ||
52 | struct fl_flow_mask_range { | |
53 | unsigned short int start; | |
54 | unsigned short int end; | |
55 | }; | |
56 | ||
57 | struct fl_flow_mask { | |
58 | struct fl_flow_key key; | |
59 | struct fl_flow_mask_range range; | |
60 | struct rcu_head rcu; | |
61 | }; | |
62 | ||
63 | struct cls_fl_head { | |
64 | struct rhashtable ht; | |
65 | struct fl_flow_mask mask; | |
66 | struct flow_dissector dissector; | |
67 | u32 hgen; | |
68 | bool mask_assigned; | |
69 | struct list_head filters; | |
70 | struct rhashtable_params ht_params; | |
d9363774 DB |
71 | union { |
72 | struct work_struct work; | |
73 | struct rcu_head rcu; | |
74 | }; | |
77b9900e JP |
75 | }; |
76 | ||
77 | struct cls_fl_filter { | |
78 | struct rhash_head ht_node; | |
79 | struct fl_flow_key mkey; | |
80 | struct tcf_exts exts; | |
81 | struct tcf_result res; | |
82 | struct fl_flow_key key; | |
83 | struct list_head list; | |
84 | u32 handle; | |
e69985c6 | 85 | u32 flags; |
77b9900e | 86 | struct rcu_head rcu; |
7091d8c7 HHZ |
87 | struct tc_to_netdev tc; |
88 | struct net_device *hw_dev; | |
77b9900e JP |
89 | }; |
90 | ||
91 | static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) | |
92 | { | |
93 | return mask->range.end - mask->range.start; | |
94 | } | |
95 | ||
96 | static void fl_mask_update_range(struct fl_flow_mask *mask) | |
97 | { | |
98 | const u8 *bytes = (const u8 *) &mask->key; | |
99 | size_t size = sizeof(mask->key); | |
100 | size_t i, first = 0, last = size - 1; | |
101 | ||
102 | for (i = 0; i < sizeof(mask->key); i++) { | |
103 | if (bytes[i]) { | |
104 | if (!first && i) | |
105 | first = i; | |
106 | last = i; | |
107 | } | |
108 | } | |
109 | mask->range.start = rounddown(first, sizeof(long)); | |
110 | mask->range.end = roundup(last + 1, sizeof(long)); | |
111 | } | |
112 | ||
113 | static void *fl_key_get_start(struct fl_flow_key *key, | |
114 | const struct fl_flow_mask *mask) | |
115 | { | |
116 | return (u8 *) key + mask->range.start; | |
117 | } | |
118 | ||
119 | static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, | |
120 | struct fl_flow_mask *mask) | |
121 | { | |
122 | const long *lkey = fl_key_get_start(key, mask); | |
123 | const long *lmask = fl_key_get_start(&mask->key, mask); | |
124 | long *lmkey = fl_key_get_start(mkey, mask); | |
125 | int i; | |
126 | ||
127 | for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) | |
128 | *lmkey++ = *lkey++ & *lmask++; | |
129 | } | |
130 | ||
131 | static void fl_clear_masked_range(struct fl_flow_key *key, | |
132 | struct fl_flow_mask *mask) | |
133 | { | |
134 | memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); | |
135 | } | |
136 | ||
a3308d8f PB |
137 | static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head, |
138 | struct fl_flow_key *mkey) | |
139 | { | |
140 | return rhashtable_lookup_fast(&head->ht, | |
141 | fl_key_get_start(mkey, &head->mask), | |
142 | head->ht_params); | |
143 | } | |
144 | ||
77b9900e JP |
145 | static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, |
146 | struct tcf_result *res) | |
147 | { | |
148 | struct cls_fl_head *head = rcu_dereference_bh(tp->root); | |
149 | struct cls_fl_filter *f; | |
150 | struct fl_flow_key skb_key; | |
151 | struct fl_flow_key skb_mkey; | |
bc3103f1 | 152 | struct ip_tunnel_info *info; |
77b9900e | 153 | |
e69985c6 AV |
154 | if (!atomic_read(&head->ht.nelems)) |
155 | return -1; | |
156 | ||
77b9900e | 157 | fl_clear_masked_range(&skb_key, &head->mask); |
bc3103f1 AV |
158 | |
159 | info = skb_tunnel_info(skb); | |
160 | if (info) { | |
161 | struct ip_tunnel_key *key = &info->key; | |
162 | ||
163 | switch (ip_tunnel_info_af(info)) { | |
164 | case AF_INET: | |
0df0f207 PB |
165 | skb_key.enc_control.addr_type = |
166 | FLOW_DISSECTOR_KEY_IPV4_ADDRS; | |
bc3103f1 AV |
167 | skb_key.enc_ipv4.src = key->u.ipv4.src; |
168 | skb_key.enc_ipv4.dst = key->u.ipv4.dst; | |
169 | break; | |
170 | case AF_INET6: | |
0df0f207 PB |
171 | skb_key.enc_control.addr_type = |
172 | FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
bc3103f1 AV |
173 | skb_key.enc_ipv6.src = key->u.ipv6.src; |
174 | skb_key.enc_ipv6.dst = key->u.ipv6.dst; | |
175 | break; | |
176 | } | |
177 | ||
178 | skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id); | |
f4d997fd HHZ |
179 | skb_key.enc_tp.src = key->tp_src; |
180 | skb_key.enc_tp.dst = key->tp_dst; | |
bc3103f1 AV |
181 | } |
182 | ||
77b9900e JP |
183 | skb_key.indev_ifindex = skb->skb_iif; |
184 | /* skb_flow_dissect() does not set n_proto in case an unknown protocol, | |
185 | * so do it rather here. | |
186 | */ | |
187 | skb_key.basic.n_proto = skb->protocol; | |
cd79a238 | 188 | skb_flow_dissect(skb, &head->dissector, &skb_key, 0); |
77b9900e JP |
189 | |
190 | fl_set_masked_key(&skb_mkey, &skb_key, &head->mask); | |
191 | ||
a3308d8f | 192 | f = fl_lookup(head, &skb_mkey); |
e8eb36cd | 193 | if (f && !tc_skip_sw(f->flags)) { |
77b9900e JP |
194 | *res = f->res; |
195 | return tcf_exts_exec(skb, &f->exts, res); | |
196 | } | |
197 | return -1; | |
198 | } | |
199 | ||
200 | static int fl_init(struct tcf_proto *tp) | |
201 | { | |
202 | struct cls_fl_head *head; | |
203 | ||
204 | head = kzalloc(sizeof(*head), GFP_KERNEL); | |
205 | if (!head) | |
206 | return -ENOBUFS; | |
207 | ||
208 | INIT_LIST_HEAD_RCU(&head->filters); | |
209 | rcu_assign_pointer(tp->root, head); | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
214 | static void fl_destroy_filter(struct rcu_head *head) | |
215 | { | |
216 | struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu); | |
217 | ||
218 | tcf_exts_destroy(&f->exts); | |
219 | kfree(f); | |
220 | } | |
221 | ||
3036dab6 | 222 | static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f) |
5b33f488 | 223 | { |
5b33f488 | 224 | struct tc_cls_flower_offload offload = {0}; |
7091d8c7 HHZ |
225 | struct net_device *dev = f->hw_dev; |
226 | struct tc_to_netdev *tc = &f->tc; | |
5b33f488 | 227 | |
79685219 | 228 | if (!tc_can_offload(dev, tp)) |
5b33f488 AV |
229 | return; |
230 | ||
231 | offload.command = TC_CLSFLOWER_DESTROY; | |
69ca05ce | 232 | offload.prio = tp->prio; |
3036dab6 | 233 | offload.cookie = (unsigned long)f; |
5b33f488 | 234 | |
7091d8c7 HHZ |
235 | tc->type = TC_SETUP_CLSFLOWER; |
236 | tc->cls_flower = &offload; | |
5b33f488 | 237 | |
7091d8c7 | 238 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); |
5b33f488 AV |
239 | } |
240 | ||
e8eb36cd AV |
241 | static int fl_hw_replace_filter(struct tcf_proto *tp, |
242 | struct flow_dissector *dissector, | |
243 | struct fl_flow_key *mask, | |
3036dab6 | 244 | struct cls_fl_filter *f) |
5b33f488 AV |
245 | { |
246 | struct net_device *dev = tp->q->dev_queue->dev; | |
247 | struct tc_cls_flower_offload offload = {0}; | |
7091d8c7 | 248 | struct tc_to_netdev *tc = &f->tc; |
e8eb36cd | 249 | int err; |
5b33f488 | 250 | |
7091d8c7 | 251 | if (!tc_can_offload(dev, tp)) { |
a6e16931 HHZ |
252 | if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) || |
253 | (f->hw_dev && !tc_can_offload(f->hw_dev, tp))) { | |
254 | f->hw_dev = dev; | |
7091d8c7 | 255 | return tc_skip_sw(f->flags) ? -EINVAL : 0; |
a6e16931 | 256 | } |
7091d8c7 HHZ |
257 | dev = f->hw_dev; |
258 | tc->egress_dev = true; | |
259 | } else { | |
260 | f->hw_dev = dev; | |
261 | } | |
5b33f488 AV |
262 | |
263 | offload.command = TC_CLSFLOWER_REPLACE; | |
69ca05ce | 264 | offload.prio = tp->prio; |
3036dab6 | 265 | offload.cookie = (unsigned long)f; |
5b33f488 AV |
266 | offload.dissector = dissector; |
267 | offload.mask = mask; | |
f93bd17b | 268 | offload.key = &f->mkey; |
3036dab6 | 269 | offload.exts = &f->exts; |
5b33f488 | 270 | |
7091d8c7 HHZ |
271 | tc->type = TC_SETUP_CLSFLOWER; |
272 | tc->cls_flower = &offload; | |
5b33f488 | 273 | |
5a7a5555 | 274 | err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, |
7091d8c7 | 275 | tc); |
e8eb36cd | 276 | |
3036dab6 | 277 | if (tc_skip_sw(f->flags)) |
e8eb36cd | 278 | return err; |
e8eb36cd | 279 | return 0; |
5b33f488 AV |
280 | } |
281 | ||
10cbc684 AV |
282 | static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) |
283 | { | |
10cbc684 | 284 | struct tc_cls_flower_offload offload = {0}; |
7091d8c7 HHZ |
285 | struct net_device *dev = f->hw_dev; |
286 | struct tc_to_netdev *tc = &f->tc; | |
10cbc684 | 287 | |
79685219 | 288 | if (!tc_can_offload(dev, tp)) |
10cbc684 AV |
289 | return; |
290 | ||
291 | offload.command = TC_CLSFLOWER_STATS; | |
69ca05ce | 292 | offload.prio = tp->prio; |
10cbc684 AV |
293 | offload.cookie = (unsigned long)f; |
294 | offload.exts = &f->exts; | |
295 | ||
7091d8c7 HHZ |
296 | tc->type = TC_SETUP_CLSFLOWER; |
297 | tc->cls_flower = &offload; | |
10cbc684 | 298 | |
7091d8c7 | 299 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); |
10cbc684 AV |
300 | } |
301 | ||
13fa876e RD |
302 | static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f) |
303 | { | |
304 | list_del_rcu(&f->list); | |
79685219 | 305 | if (!tc_skip_hw(f->flags)) |
3036dab6 | 306 | fl_hw_destroy_filter(tp, f); |
13fa876e RD |
307 | tcf_unbind_filter(tp, &f->res); |
308 | call_rcu(&f->rcu, fl_destroy_filter); | |
309 | } | |
310 | ||
d9363774 DB |
311 | static void fl_destroy_sleepable(struct work_struct *work) |
312 | { | |
313 | struct cls_fl_head *head = container_of(work, struct cls_fl_head, | |
314 | work); | |
315 | if (head->mask_assigned) | |
316 | rhashtable_destroy(&head->ht); | |
317 | kfree(head); | |
318 | module_put(THIS_MODULE); | |
319 | } | |
320 | ||
321 | static void fl_destroy_rcu(struct rcu_head *rcu) | |
322 | { | |
323 | struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu); | |
324 | ||
325 | INIT_WORK(&head->work, fl_destroy_sleepable); | |
326 | schedule_work(&head->work); | |
327 | } | |
328 | ||
77b9900e JP |
329 | static bool fl_destroy(struct tcf_proto *tp, bool force) |
330 | { | |
331 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
332 | struct cls_fl_filter *f, *next; | |
333 | ||
334 | if (!force && !list_empty(&head->filters)) | |
335 | return false; | |
336 | ||
13fa876e RD |
337 | list_for_each_entry_safe(f, next, &head->filters, list) |
338 | __fl_delete(tp, f); | |
d9363774 DB |
339 | |
340 | __module_get(THIS_MODULE); | |
341 | call_rcu(&head->rcu, fl_destroy_rcu); | |
2745529a | 342 | |
77b9900e JP |
343 | return true; |
344 | } | |
345 | ||
346 | static unsigned long fl_get(struct tcf_proto *tp, u32 handle) | |
347 | { | |
348 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
349 | struct cls_fl_filter *f; | |
350 | ||
351 | list_for_each_entry(f, &head->filters, list) | |
352 | if (f->handle == handle) | |
353 | return (unsigned long) f; | |
354 | return 0; | |
355 | } | |
356 | ||
357 | static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { | |
358 | [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, | |
359 | [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, | |
360 | [TCA_FLOWER_INDEV] = { .type = NLA_STRING, | |
361 | .len = IFNAMSIZ }, | |
362 | [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, | |
363 | [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, | |
364 | [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, | |
365 | [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, | |
366 | [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, | |
367 | [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, | |
368 | [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, | |
369 | [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, | |
370 | [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, | |
371 | [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, | |
372 | [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, | |
373 | [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, | |
374 | [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, | |
375 | [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, | |
376 | [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, | |
377 | [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, | |
b175c3a4 JHS |
378 | [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, |
379 | [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, | |
9399ae9a HHZ |
380 | [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, |
381 | [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, | |
382 | [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, | |
bc3103f1 AV |
383 | [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, |
384 | [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, | |
385 | [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, | |
386 | [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, | |
387 | [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, | |
388 | [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, | |
389 | [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, | |
390 | [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, | |
391 | [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, | |
aa72d708 OG |
392 | [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, |
393 | [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, | |
394 | [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, | |
395 | [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, | |
5976c5f4 SH |
396 | [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, |
397 | [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, | |
398 | [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, | |
399 | [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, | |
f4d997fd HHZ |
400 | [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, |
401 | [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, | |
402 | [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, | |
403 | [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, | |
faa3ffce OG |
404 | [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, |
405 | [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, | |
7b684884 SH |
406 | [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, |
407 | [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, | |
408 | [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, | |
409 | [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, | |
410 | [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, | |
411 | [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, | |
412 | [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, | |
413 | [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, | |
99d31326 SH |
414 | [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, |
415 | [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, | |
416 | [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, | |
417 | [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, | |
418 | [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, | |
419 | [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, | |
420 | [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, | |
421 | [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, | |
422 | [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, | |
423 | [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, | |
77b9900e JP |
424 | }; |
425 | ||
426 | static void fl_set_key_val(struct nlattr **tb, | |
427 | void *val, int val_type, | |
428 | void *mask, int mask_type, int len) | |
429 | { | |
430 | if (!tb[val_type]) | |
431 | return; | |
432 | memcpy(val, nla_data(tb[val_type]), len); | |
433 | if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) | |
434 | memset(mask, 0xff, len); | |
435 | else | |
436 | memcpy(mask, nla_data(tb[mask_type]), len); | |
437 | } | |
438 | ||
9399ae9a HHZ |
439 | static void fl_set_key_vlan(struct nlattr **tb, |
440 | struct flow_dissector_key_vlan *key_val, | |
441 | struct flow_dissector_key_vlan *key_mask) | |
442 | { | |
443 | #define VLAN_PRIORITY_MASK 0x7 | |
444 | ||
445 | if (tb[TCA_FLOWER_KEY_VLAN_ID]) { | |
446 | key_val->vlan_id = | |
447 | nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK; | |
448 | key_mask->vlan_id = VLAN_VID_MASK; | |
449 | } | |
450 | if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) { | |
451 | key_val->vlan_priority = | |
452 | nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) & | |
453 | VLAN_PRIORITY_MASK; | |
454 | key_mask->vlan_priority = VLAN_PRIORITY_MASK; | |
455 | } | |
456 | } | |
457 | ||
faa3ffce OG |
458 | static void fl_set_key_flag(u32 flower_key, u32 flower_mask, |
459 | u32 *dissector_key, u32 *dissector_mask, | |
460 | u32 flower_flag_bit, u32 dissector_flag_bit) | |
461 | { | |
462 | if (flower_mask & flower_flag_bit) { | |
463 | *dissector_mask |= dissector_flag_bit; | |
464 | if (flower_key & flower_flag_bit) | |
465 | *dissector_key |= dissector_flag_bit; | |
466 | } | |
467 | } | |
468 | ||
d9724772 OG |
469 | static int fl_set_key_flags(struct nlattr **tb, |
470 | u32 *flags_key, u32 *flags_mask) | |
faa3ffce OG |
471 | { |
472 | u32 key, mask; | |
473 | ||
d9724772 OG |
474 | /* mask is mandatory for flags */ |
475 | if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) | |
476 | return -EINVAL; | |
faa3ffce OG |
477 | |
478 | key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); | |
d9724772 | 479 | mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); |
faa3ffce OG |
480 | |
481 | *flags_key = 0; | |
482 | *flags_mask = 0; | |
483 | ||
484 | fl_set_key_flag(key, mask, flags_key, flags_mask, | |
485 | TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); | |
d9724772 OG |
486 | |
487 | return 0; | |
faa3ffce OG |
488 | } |
489 | ||
77b9900e JP |
490 | static int fl_set_key(struct net *net, struct nlattr **tb, |
491 | struct fl_flow_key *key, struct fl_flow_key *mask) | |
492 | { | |
9399ae9a | 493 | __be16 ethertype; |
d9724772 | 494 | int ret = 0; |
dd3aa3b5 | 495 | #ifdef CONFIG_NET_CLS_IND |
77b9900e | 496 | if (tb[TCA_FLOWER_INDEV]) { |
dd3aa3b5 | 497 | int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]); |
77b9900e JP |
498 | if (err < 0) |
499 | return err; | |
500 | key->indev_ifindex = err; | |
501 | mask->indev_ifindex = 0xffffffff; | |
502 | } | |
dd3aa3b5 | 503 | #endif |
77b9900e JP |
504 | |
505 | fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, | |
506 | mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, | |
507 | sizeof(key->eth.dst)); | |
508 | fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, | |
509 | mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, | |
510 | sizeof(key->eth.src)); | |
66530bdf | 511 | |
0b498a52 | 512 | if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { |
9399ae9a HHZ |
513 | ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); |
514 | ||
0b498a52 AB |
515 | if (ethertype == htons(ETH_P_8021Q)) { |
516 | fl_set_key_vlan(tb, &key->vlan, &mask->vlan); | |
517 | fl_set_key_val(tb, &key->basic.n_proto, | |
518 | TCA_FLOWER_KEY_VLAN_ETH_TYPE, | |
519 | &mask->basic.n_proto, TCA_FLOWER_UNSPEC, | |
520 | sizeof(key->basic.n_proto)); | |
521 | } else { | |
522 | key->basic.n_proto = ethertype; | |
523 | mask->basic.n_proto = cpu_to_be16(~0); | |
524 | } | |
9399ae9a | 525 | } |
66530bdf | 526 | |
77b9900e JP |
527 | if (key->basic.n_proto == htons(ETH_P_IP) || |
528 | key->basic.n_proto == htons(ETH_P_IPV6)) { | |
529 | fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, | |
530 | &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, | |
531 | sizeof(key->basic.ip_proto)); | |
532 | } | |
66530bdf JHS |
533 | |
534 | if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { | |
535 | key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; | |
970bfcd0 | 536 | mask->control.addr_type = ~0; |
77b9900e JP |
537 | fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, |
538 | &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, | |
539 | sizeof(key->ipv4.src)); | |
540 | fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, | |
541 | &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, | |
542 | sizeof(key->ipv4.dst)); | |
66530bdf JHS |
543 | } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { |
544 | key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
970bfcd0 | 545 | mask->control.addr_type = ~0; |
77b9900e JP |
546 | fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, |
547 | &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, | |
548 | sizeof(key->ipv6.src)); | |
549 | fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, | |
550 | &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, | |
551 | sizeof(key->ipv6.dst)); | |
552 | } | |
66530bdf | 553 | |
77b9900e JP |
554 | if (key->basic.ip_proto == IPPROTO_TCP) { |
555 | fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, | |
aa72d708 | 556 | &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, |
77b9900e JP |
557 | sizeof(key->tp.src)); |
558 | fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, | |
aa72d708 | 559 | &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, |
77b9900e JP |
560 | sizeof(key->tp.dst)); |
561 | } else if (key->basic.ip_proto == IPPROTO_UDP) { | |
562 | fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, | |
aa72d708 | 563 | &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, |
77b9900e JP |
564 | sizeof(key->tp.src)); |
565 | fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, | |
aa72d708 | 566 | &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, |
77b9900e | 567 | sizeof(key->tp.dst)); |
5976c5f4 SH |
568 | } else if (key->basic.ip_proto == IPPROTO_SCTP) { |
569 | fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, | |
570 | &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, | |
571 | sizeof(key->tp.src)); | |
572 | fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, | |
573 | &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, | |
574 | sizeof(key->tp.dst)); | |
7b684884 SH |
575 | } else if (key->basic.n_proto == htons(ETH_P_IP) && |
576 | key->basic.ip_proto == IPPROTO_ICMP) { | |
577 | fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, | |
578 | &mask->icmp.type, | |
579 | TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, | |
580 | sizeof(key->icmp.type)); | |
581 | fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, | |
582 | &mask->icmp.code, | |
583 | TCA_FLOWER_KEY_ICMPV4_CODE_MASK, | |
584 | sizeof(key->icmp.code)); | |
585 | } else if (key->basic.n_proto == htons(ETH_P_IPV6) && | |
586 | key->basic.ip_proto == IPPROTO_ICMPV6) { | |
587 | fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, | |
588 | &mask->icmp.type, | |
589 | TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, | |
590 | sizeof(key->icmp.type)); | |
040587af | 591 | fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, |
7b684884 | 592 | &mask->icmp.code, |
040587af | 593 | TCA_FLOWER_KEY_ICMPV6_CODE_MASK, |
7b684884 | 594 | sizeof(key->icmp.code)); |
99d31326 SH |
595 | } else if (key->basic.n_proto == htons(ETH_P_ARP) || |
596 | key->basic.n_proto == htons(ETH_P_RARP)) { | |
597 | fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, | |
598 | &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, | |
599 | sizeof(key->arp.sip)); | |
600 | fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, | |
601 | &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, | |
602 | sizeof(key->arp.tip)); | |
603 | fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, | |
604 | &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, | |
605 | sizeof(key->arp.op)); | |
606 | fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, | |
607 | mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, | |
608 | sizeof(key->arp.sha)); | |
609 | fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, | |
610 | mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, | |
611 | sizeof(key->arp.tha)); | |
77b9900e JP |
612 | } |
613 | ||
bc3103f1 AV |
614 | if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || |
615 | tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { | |
616 | key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; | |
970bfcd0 | 617 | mask->enc_control.addr_type = ~0; |
bc3103f1 AV |
618 | fl_set_key_val(tb, &key->enc_ipv4.src, |
619 | TCA_FLOWER_KEY_ENC_IPV4_SRC, | |
620 | &mask->enc_ipv4.src, | |
621 | TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, | |
622 | sizeof(key->enc_ipv4.src)); | |
623 | fl_set_key_val(tb, &key->enc_ipv4.dst, | |
624 | TCA_FLOWER_KEY_ENC_IPV4_DST, | |
625 | &mask->enc_ipv4.dst, | |
626 | TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, | |
627 | sizeof(key->enc_ipv4.dst)); | |
628 | } | |
629 | ||
630 | if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || | |
631 | tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { | |
632 | key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
970bfcd0 | 633 | mask->enc_control.addr_type = ~0; |
bc3103f1 AV |
634 | fl_set_key_val(tb, &key->enc_ipv6.src, |
635 | TCA_FLOWER_KEY_ENC_IPV6_SRC, | |
636 | &mask->enc_ipv6.src, | |
637 | TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, | |
638 | sizeof(key->enc_ipv6.src)); | |
639 | fl_set_key_val(tb, &key->enc_ipv6.dst, | |
640 | TCA_FLOWER_KEY_ENC_IPV6_DST, | |
641 | &mask->enc_ipv6.dst, | |
642 | TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, | |
643 | sizeof(key->enc_ipv6.dst)); | |
644 | } | |
645 | ||
646 | fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, | |
eb523f42 | 647 | &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, |
bc3103f1 AV |
648 | sizeof(key->enc_key_id.keyid)); |
649 | ||
f4d997fd HHZ |
650 | fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, |
651 | &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, | |
652 | sizeof(key->enc_tp.src)); | |
653 | ||
654 | fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, | |
655 | &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, | |
656 | sizeof(key->enc_tp.dst)); | |
657 | ||
d9724772 OG |
658 | if (tb[TCA_FLOWER_KEY_FLAGS]) |
659 | ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); | |
faa3ffce | 660 | |
d9724772 | 661 | return ret; |
77b9900e JP |
662 | } |
663 | ||
664 | static bool fl_mask_eq(struct fl_flow_mask *mask1, | |
665 | struct fl_flow_mask *mask2) | |
666 | { | |
667 | const long *lmask1 = fl_key_get_start(&mask1->key, mask1); | |
668 | const long *lmask2 = fl_key_get_start(&mask2->key, mask2); | |
669 | ||
670 | return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) && | |
671 | !memcmp(lmask1, lmask2, fl_mask_range(mask1)); | |
672 | } | |
673 | ||
674 | static const struct rhashtable_params fl_ht_params = { | |
675 | .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ | |
676 | .head_offset = offsetof(struct cls_fl_filter, ht_node), | |
677 | .automatic_shrinking = true, | |
678 | }; | |
679 | ||
680 | static int fl_init_hashtable(struct cls_fl_head *head, | |
681 | struct fl_flow_mask *mask) | |
682 | { | |
683 | head->ht_params = fl_ht_params; | |
684 | head->ht_params.key_len = fl_mask_range(mask); | |
685 | head->ht_params.key_offset += mask->range.start; | |
686 | ||
687 | return rhashtable_init(&head->ht, &head->ht_params); | |
688 | } | |
689 | ||
690 | #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) | |
691 | #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) | |
77b9900e | 692 | |
339ba878 HHZ |
693 | #define FL_KEY_IS_MASKED(mask, member) \ |
694 | memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ | |
695 | 0, FL_KEY_MEMBER_SIZE(member)) \ | |
77b9900e JP |
696 | |
697 | #define FL_KEY_SET(keys, cnt, id, member) \ | |
698 | do { \ | |
699 | keys[cnt].key_id = id; \ | |
700 | keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ | |
701 | cnt++; \ | |
702 | } while(0); | |
703 | ||
339ba878 | 704 | #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ |
77b9900e | 705 | do { \ |
339ba878 | 706 | if (FL_KEY_IS_MASKED(mask, member)) \ |
77b9900e JP |
707 | FL_KEY_SET(keys, cnt, id, member); \ |
708 | } while(0); | |
709 | ||
710 | static void fl_init_dissector(struct cls_fl_head *head, | |
711 | struct fl_flow_mask *mask) | |
712 | { | |
713 | struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; | |
714 | size_t cnt = 0; | |
715 | ||
42aecaa9 | 716 | FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); |
77b9900e | 717 | FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); |
339ba878 HHZ |
718 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
719 | FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); | |
720 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
721 | FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); | |
722 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
723 | FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); | |
724 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
725 | FLOW_DISSECTOR_KEY_PORTS, tp); | |
7b684884 SH |
726 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
727 | FLOW_DISSECTOR_KEY_ICMP, icmp); | |
99d31326 SH |
728 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
729 | FLOW_DISSECTOR_KEY_ARP, arp); | |
9399ae9a HHZ |
730 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
731 | FLOW_DISSECTOR_KEY_VLAN, vlan); | |
519d1052 HHZ |
732 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
733 | FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); | |
734 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
735 | FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); | |
736 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, | |
737 | FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); | |
738 | if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) || | |
739 | FL_KEY_IS_MASKED(&mask->key, enc_ipv6)) | |
740 | FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, | |
741 | enc_control); | |
f4d997fd HHZ |
742 | FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, |
743 | FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); | |
77b9900e JP |
744 | |
745 | skb_flow_dissector_init(&head->dissector, keys, cnt); | |
746 | } | |
747 | ||
748 | static int fl_check_assign_mask(struct cls_fl_head *head, | |
749 | struct fl_flow_mask *mask) | |
750 | { | |
751 | int err; | |
752 | ||
753 | if (head->mask_assigned) { | |
754 | if (!fl_mask_eq(&head->mask, mask)) | |
755 | return -EINVAL; | |
756 | else | |
757 | return 0; | |
758 | } | |
759 | ||
760 | /* Mask is not assigned yet. So assign it and init hashtable | |
761 | * according to that. | |
762 | */ | |
763 | err = fl_init_hashtable(head, mask); | |
764 | if (err) | |
765 | return err; | |
766 | memcpy(&head->mask, mask, sizeof(head->mask)); | |
767 | head->mask_assigned = true; | |
768 | ||
769 | fl_init_dissector(head, mask); | |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
774 | static int fl_set_parms(struct net *net, struct tcf_proto *tp, | |
775 | struct cls_fl_filter *f, struct fl_flow_mask *mask, | |
776 | unsigned long base, struct nlattr **tb, | |
777 | struct nlattr *est, bool ovr) | |
778 | { | |
779 | struct tcf_exts e; | |
780 | int err; | |
781 | ||
b9a24bb7 | 782 | err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0); |
77b9900e JP |
783 | if (err < 0) |
784 | return err; | |
b9a24bb7 WC |
785 | err = tcf_exts_validate(net, tp, tb, est, &e, ovr); |
786 | if (err < 0) | |
787 | goto errout; | |
77b9900e JP |
788 | |
789 | if (tb[TCA_FLOWER_CLASSID]) { | |
790 | f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); | |
791 | tcf_bind_filter(tp, &f->res, base); | |
792 | } | |
793 | ||
794 | err = fl_set_key(net, tb, &f->key, &mask->key); | |
795 | if (err) | |
796 | goto errout; | |
797 | ||
798 | fl_mask_update_range(mask); | |
799 | fl_set_masked_key(&f->mkey, &f->key, mask); | |
800 | ||
801 | tcf_exts_change(tp, &f->exts, &e); | |
802 | ||
803 | return 0; | |
804 | errout: | |
805 | tcf_exts_destroy(&e); | |
806 | return err; | |
807 | } | |
808 | ||
809 | static u32 fl_grab_new_handle(struct tcf_proto *tp, | |
810 | struct cls_fl_head *head) | |
811 | { | |
812 | unsigned int i = 0x80000000; | |
813 | u32 handle; | |
814 | ||
815 | do { | |
816 | if (++head->hgen == 0x7FFFFFFF) | |
817 | head->hgen = 1; | |
818 | } while (--i > 0 && fl_get(tp, head->hgen)); | |
819 | ||
820 | if (unlikely(i == 0)) { | |
821 | pr_err("Insufficient number of handles\n"); | |
822 | handle = 0; | |
823 | } else { | |
824 | handle = head->hgen; | |
825 | } | |
826 | ||
827 | return handle; | |
828 | } | |
829 | ||
830 | static int fl_change(struct net *net, struct sk_buff *in_skb, | |
831 | struct tcf_proto *tp, unsigned long base, | |
832 | u32 handle, struct nlattr **tca, | |
833 | unsigned long *arg, bool ovr) | |
834 | { | |
835 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
836 | struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg; | |
837 | struct cls_fl_filter *fnew; | |
39b7b6a6 | 838 | struct nlattr **tb; |
77b9900e JP |
839 | struct fl_flow_mask mask = {}; |
840 | int err; | |
841 | ||
842 | if (!tca[TCA_OPTIONS]) | |
843 | return -EINVAL; | |
844 | ||
39b7b6a6 AB |
845 | tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); |
846 | if (!tb) | |
847 | return -ENOBUFS; | |
848 | ||
77b9900e JP |
849 | err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], fl_policy); |
850 | if (err < 0) | |
39b7b6a6 | 851 | goto errout_tb; |
77b9900e | 852 | |
39b7b6a6 AB |
853 | if (fold && handle && fold->handle != handle) { |
854 | err = -EINVAL; | |
855 | goto errout_tb; | |
856 | } | |
77b9900e JP |
857 | |
858 | fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); | |
39b7b6a6 AB |
859 | if (!fnew) { |
860 | err = -ENOBUFS; | |
861 | goto errout_tb; | |
862 | } | |
77b9900e | 863 | |
b9a24bb7 WC |
864 | err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); |
865 | if (err < 0) | |
866 | goto errout; | |
77b9900e JP |
867 | |
868 | if (!handle) { | |
869 | handle = fl_grab_new_handle(tp, head); | |
870 | if (!handle) { | |
871 | err = -EINVAL; | |
872 | goto errout; | |
873 | } | |
874 | } | |
875 | fnew->handle = handle; | |
876 | ||
e69985c6 AV |
877 | if (tb[TCA_FLOWER_FLAGS]) { |
878 | fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); | |
879 | ||
880 | if (!tc_flags_valid(fnew->flags)) { | |
881 | err = -EINVAL; | |
882 | goto errout; | |
883 | } | |
884 | } | |
5b33f488 | 885 | |
77b9900e JP |
886 | err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr); |
887 | if (err) | |
888 | goto errout; | |
889 | ||
890 | err = fl_check_assign_mask(head, &mask); | |
891 | if (err) | |
892 | goto errout; | |
893 | ||
e8eb36cd | 894 | if (!tc_skip_sw(fnew->flags)) { |
a3308d8f PB |
895 | if (!fold && fl_lookup(head, &fnew->mkey)) { |
896 | err = -EEXIST; | |
897 | goto errout; | |
898 | } | |
899 | ||
e69985c6 AV |
900 | err = rhashtable_insert_fast(&head->ht, &fnew->ht_node, |
901 | head->ht_params); | |
902 | if (err) | |
903 | goto errout; | |
904 | } | |
5b33f488 | 905 | |
79685219 HHZ |
906 | if (!tc_skip_hw(fnew->flags)) { |
907 | err = fl_hw_replace_filter(tp, | |
908 | &head->dissector, | |
909 | &mask.key, | |
3036dab6 | 910 | fnew); |
79685219 HHZ |
911 | if (err) |
912 | goto errout; | |
913 | } | |
5b33f488 AV |
914 | |
915 | if (fold) { | |
725cbb62 JP |
916 | if (!tc_skip_sw(fold->flags)) |
917 | rhashtable_remove_fast(&head->ht, &fold->ht_node, | |
918 | head->ht_params); | |
79685219 | 919 | if (!tc_skip_hw(fold->flags)) |
3036dab6 | 920 | fl_hw_destroy_filter(tp, fold); |
5b33f488 | 921 | } |
77b9900e JP |
922 | |
923 | *arg = (unsigned long) fnew; | |
924 | ||
925 | if (fold) { | |
ff3532f2 | 926 | list_replace_rcu(&fold->list, &fnew->list); |
77b9900e JP |
927 | tcf_unbind_filter(tp, &fold->res); |
928 | call_rcu(&fold->rcu, fl_destroy_filter); | |
929 | } else { | |
930 | list_add_tail_rcu(&fnew->list, &head->filters); | |
931 | } | |
932 | ||
39b7b6a6 | 933 | kfree(tb); |
77b9900e JP |
934 | return 0; |
935 | ||
936 | errout: | |
b9a24bb7 | 937 | tcf_exts_destroy(&fnew->exts); |
77b9900e | 938 | kfree(fnew); |
39b7b6a6 AB |
939 | errout_tb: |
940 | kfree(tb); | |
77b9900e JP |
941 | return err; |
942 | } | |
943 | ||
944 | static int fl_delete(struct tcf_proto *tp, unsigned long arg) | |
945 | { | |
946 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
947 | struct cls_fl_filter *f = (struct cls_fl_filter *) arg; | |
948 | ||
725cbb62 JP |
949 | if (!tc_skip_sw(f->flags)) |
950 | rhashtable_remove_fast(&head->ht, &f->ht_node, | |
951 | head->ht_params); | |
13fa876e | 952 | __fl_delete(tp, f); |
77b9900e JP |
953 | return 0; |
954 | } | |
955 | ||
956 | static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) | |
957 | { | |
958 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
959 | struct cls_fl_filter *f; | |
960 | ||
961 | list_for_each_entry_rcu(f, &head->filters, list) { | |
962 | if (arg->count < arg->skip) | |
963 | goto skip; | |
964 | if (arg->fn(tp, (unsigned long) f, arg) < 0) { | |
965 | arg->stop = 1; | |
966 | break; | |
967 | } | |
968 | skip: | |
969 | arg->count++; | |
970 | } | |
971 | } | |
972 | ||
973 | static int fl_dump_key_val(struct sk_buff *skb, | |
974 | void *val, int val_type, | |
975 | void *mask, int mask_type, int len) | |
976 | { | |
977 | int err; | |
978 | ||
979 | if (!memchr_inv(mask, 0, len)) | |
980 | return 0; | |
981 | err = nla_put(skb, val_type, len, val); | |
982 | if (err) | |
983 | return err; | |
984 | if (mask_type != TCA_FLOWER_UNSPEC) { | |
985 | err = nla_put(skb, mask_type, len, mask); | |
986 | if (err) | |
987 | return err; | |
988 | } | |
989 | return 0; | |
990 | } | |
991 | ||
9399ae9a HHZ |
992 | static int fl_dump_key_vlan(struct sk_buff *skb, |
993 | struct flow_dissector_key_vlan *vlan_key, | |
994 | struct flow_dissector_key_vlan *vlan_mask) | |
995 | { | |
996 | int err; | |
997 | ||
998 | if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) | |
999 | return 0; | |
1000 | if (vlan_mask->vlan_id) { | |
1001 | err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID, | |
1002 | vlan_key->vlan_id); | |
1003 | if (err) | |
1004 | return err; | |
1005 | } | |
1006 | if (vlan_mask->vlan_priority) { | |
1007 | err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO, | |
1008 | vlan_key->vlan_priority); | |
1009 | if (err) | |
1010 | return err; | |
1011 | } | |
1012 | return 0; | |
1013 | } | |
1014 | ||
faa3ffce OG |
1015 | static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, |
1016 | u32 *flower_key, u32 *flower_mask, | |
1017 | u32 flower_flag_bit, u32 dissector_flag_bit) | |
1018 | { | |
1019 | if (dissector_mask & dissector_flag_bit) { | |
1020 | *flower_mask |= flower_flag_bit; | |
1021 | if (dissector_key & dissector_flag_bit) | |
1022 | *flower_key |= flower_flag_bit; | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) | |
1027 | { | |
1028 | u32 key, mask; | |
1029 | __be32 _key, _mask; | |
1030 | int err; | |
1031 | ||
1032 | if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) | |
1033 | return 0; | |
1034 | ||
1035 | key = 0; | |
1036 | mask = 0; | |
1037 | ||
1038 | fl_get_key_flag(flags_key, flags_mask, &key, &mask, | |
1039 | TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); | |
1040 | ||
1041 | _key = cpu_to_be32(key); | |
1042 | _mask = cpu_to_be32(mask); | |
1043 | ||
1044 | err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); | |
1045 | if (err) | |
1046 | return err; | |
1047 | ||
1048 | return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); | |
1049 | } | |
1050 | ||
77b9900e JP |
1051 | static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, |
1052 | struct sk_buff *skb, struct tcmsg *t) | |
1053 | { | |
1054 | struct cls_fl_head *head = rtnl_dereference(tp->root); | |
1055 | struct cls_fl_filter *f = (struct cls_fl_filter *) fh; | |
1056 | struct nlattr *nest; | |
1057 | struct fl_flow_key *key, *mask; | |
1058 | ||
1059 | if (!f) | |
1060 | return skb->len; | |
1061 | ||
1062 | t->tcm_handle = f->handle; | |
1063 | ||
1064 | nest = nla_nest_start(skb, TCA_OPTIONS); | |
1065 | if (!nest) | |
1066 | goto nla_put_failure; | |
1067 | ||
1068 | if (f->res.classid && | |
1069 | nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) | |
1070 | goto nla_put_failure; | |
1071 | ||
1072 | key = &f->key; | |
1073 | mask = &head->mask.key; | |
1074 | ||
1075 | if (mask->indev_ifindex) { | |
1076 | struct net_device *dev; | |
1077 | ||
1078 | dev = __dev_get_by_index(net, key->indev_ifindex); | |
1079 | if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) | |
1080 | goto nla_put_failure; | |
1081 | } | |
1082 | ||
79685219 HHZ |
1083 | if (!tc_skip_hw(f->flags)) |
1084 | fl_hw_update_stats(tp, f); | |
10cbc684 | 1085 | |
77b9900e JP |
1086 | if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, |
1087 | mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, | |
1088 | sizeof(key->eth.dst)) || | |
1089 | fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, | |
1090 | mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, | |
1091 | sizeof(key->eth.src)) || | |
1092 | fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, | |
1093 | &mask->basic.n_proto, TCA_FLOWER_UNSPEC, | |
1094 | sizeof(key->basic.n_proto))) | |
1095 | goto nla_put_failure; | |
9399ae9a HHZ |
1096 | |
1097 | if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan)) | |
1098 | goto nla_put_failure; | |
1099 | ||
77b9900e JP |
1100 | if ((key->basic.n_proto == htons(ETH_P_IP) || |
1101 | key->basic.n_proto == htons(ETH_P_IPV6)) && | |
1102 | fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, | |
1103 | &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, | |
1104 | sizeof(key->basic.ip_proto))) | |
1105 | goto nla_put_failure; | |
1106 | ||
c3f83241 | 1107 | if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && |
77b9900e JP |
1108 | (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, |
1109 | &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, | |
1110 | sizeof(key->ipv4.src)) || | |
1111 | fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, | |
1112 | &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, | |
1113 | sizeof(key->ipv4.dst)))) | |
1114 | goto nla_put_failure; | |
c3f83241 | 1115 | else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && |
77b9900e JP |
1116 | (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, |
1117 | &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, | |
1118 | sizeof(key->ipv6.src)) || | |
1119 | fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, | |
1120 | &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, | |
1121 | sizeof(key->ipv6.dst)))) | |
1122 | goto nla_put_failure; | |
1123 | ||
1124 | if (key->basic.ip_proto == IPPROTO_TCP && | |
1125 | (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, | |
aa72d708 | 1126 | &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, |
77b9900e JP |
1127 | sizeof(key->tp.src)) || |
1128 | fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, | |
aa72d708 | 1129 | &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, |
77b9900e JP |
1130 | sizeof(key->tp.dst)))) |
1131 | goto nla_put_failure; | |
1132 | else if (key->basic.ip_proto == IPPROTO_UDP && | |
1133 | (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, | |
aa72d708 | 1134 | &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, |
77b9900e JP |
1135 | sizeof(key->tp.src)) || |
1136 | fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, | |
aa72d708 | 1137 | &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, |
5976c5f4 SH |
1138 | sizeof(key->tp.dst)))) |
1139 | goto nla_put_failure; | |
1140 | else if (key->basic.ip_proto == IPPROTO_SCTP && | |
1141 | (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, | |
1142 | &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, | |
1143 | sizeof(key->tp.src)) || | |
1144 | fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, | |
1145 | &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, | |
77b9900e JP |
1146 | sizeof(key->tp.dst)))) |
1147 | goto nla_put_failure; | |
7b684884 SH |
1148 | else if (key->basic.n_proto == htons(ETH_P_IP) && |
1149 | key->basic.ip_proto == IPPROTO_ICMP && | |
1150 | (fl_dump_key_val(skb, &key->icmp.type, | |
1151 | TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, | |
1152 | TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, | |
1153 | sizeof(key->icmp.type)) || | |
1154 | fl_dump_key_val(skb, &key->icmp.code, | |
1155 | TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, | |
1156 | TCA_FLOWER_KEY_ICMPV4_CODE_MASK, | |
1157 | sizeof(key->icmp.code)))) | |
1158 | goto nla_put_failure; | |
1159 | else if (key->basic.n_proto == htons(ETH_P_IPV6) && | |
1160 | key->basic.ip_proto == IPPROTO_ICMPV6 && | |
1161 | (fl_dump_key_val(skb, &key->icmp.type, | |
1162 | TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, | |
1163 | TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, | |
1164 | sizeof(key->icmp.type)) || | |
1165 | fl_dump_key_val(skb, &key->icmp.code, | |
1166 | TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, | |
1167 | TCA_FLOWER_KEY_ICMPV6_CODE_MASK, | |
1168 | sizeof(key->icmp.code)))) | |
1169 | goto nla_put_failure; | |
99d31326 SH |
1170 | else if ((key->basic.n_proto == htons(ETH_P_ARP) || |
1171 | key->basic.n_proto == htons(ETH_P_RARP)) && | |
1172 | (fl_dump_key_val(skb, &key->arp.sip, | |
1173 | TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, | |
1174 | TCA_FLOWER_KEY_ARP_SIP_MASK, | |
1175 | sizeof(key->arp.sip)) || | |
1176 | fl_dump_key_val(skb, &key->arp.tip, | |
1177 | TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, | |
1178 | TCA_FLOWER_KEY_ARP_TIP_MASK, | |
1179 | sizeof(key->arp.tip)) || | |
1180 | fl_dump_key_val(skb, &key->arp.op, | |
1181 | TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, | |
1182 | TCA_FLOWER_KEY_ARP_OP_MASK, | |
1183 | sizeof(key->arp.op)) || | |
1184 | fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, | |
1185 | mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, | |
1186 | sizeof(key->arp.sha)) || | |
1187 | fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, | |
1188 | mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, | |
1189 | sizeof(key->arp.tha)))) | |
1190 | goto nla_put_failure; | |
77b9900e | 1191 | |
bc3103f1 AV |
1192 | if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && |
1193 | (fl_dump_key_val(skb, &key->enc_ipv4.src, | |
1194 | TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, | |
1195 | TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, | |
1196 | sizeof(key->enc_ipv4.src)) || | |
1197 | fl_dump_key_val(skb, &key->enc_ipv4.dst, | |
1198 | TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, | |
1199 | TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, | |
1200 | sizeof(key->enc_ipv4.dst)))) | |
1201 | goto nla_put_failure; | |
1202 | else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && | |
1203 | (fl_dump_key_val(skb, &key->enc_ipv6.src, | |
1204 | TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, | |
1205 | TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, | |
1206 | sizeof(key->enc_ipv6.src)) || | |
1207 | fl_dump_key_val(skb, &key->enc_ipv6.dst, | |
1208 | TCA_FLOWER_KEY_ENC_IPV6_DST, | |
1209 | &mask->enc_ipv6.dst, | |
1210 | TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, | |
1211 | sizeof(key->enc_ipv6.dst)))) | |
1212 | goto nla_put_failure; | |
1213 | ||
1214 | if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, | |
eb523f42 | 1215 | &mask->enc_key_id, TCA_FLOWER_UNSPEC, |
f4d997fd HHZ |
1216 | sizeof(key->enc_key_id)) || |
1217 | fl_dump_key_val(skb, &key->enc_tp.src, | |
1218 | TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, | |
1219 | &mask->enc_tp.src, | |
1220 | TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, | |
1221 | sizeof(key->enc_tp.src)) || | |
1222 | fl_dump_key_val(skb, &key->enc_tp.dst, | |
1223 | TCA_FLOWER_KEY_ENC_UDP_DST_PORT, | |
1224 | &mask->enc_tp.dst, | |
1225 | TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, | |
1226 | sizeof(key->enc_tp.dst))) | |
bc3103f1 AV |
1227 | goto nla_put_failure; |
1228 | ||
faa3ffce OG |
1229 | if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) |
1230 | goto nla_put_failure; | |
1231 | ||
e69985c6 AV |
1232 | nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags); |
1233 | ||
77b9900e JP |
1234 | if (tcf_exts_dump(skb, &f->exts)) |
1235 | goto nla_put_failure; | |
1236 | ||
1237 | nla_nest_end(skb, nest); | |
1238 | ||
1239 | if (tcf_exts_dump_stats(skb, &f->exts) < 0) | |
1240 | goto nla_put_failure; | |
1241 | ||
1242 | return skb->len; | |
1243 | ||
1244 | nla_put_failure: | |
1245 | nla_nest_cancel(skb, nest); | |
1246 | return -1; | |
1247 | } | |
1248 | ||
1249 | static struct tcf_proto_ops cls_fl_ops __read_mostly = { | |
1250 | .kind = "flower", | |
1251 | .classify = fl_classify, | |
1252 | .init = fl_init, | |
1253 | .destroy = fl_destroy, | |
1254 | .get = fl_get, | |
1255 | .change = fl_change, | |
1256 | .delete = fl_delete, | |
1257 | .walk = fl_walk, | |
1258 | .dump = fl_dump, | |
1259 | .owner = THIS_MODULE, | |
1260 | }; | |
1261 | ||
1262 | static int __init cls_fl_init(void) | |
1263 | { | |
1264 | return register_tcf_proto_ops(&cls_fl_ops); | |
1265 | } | |
1266 | ||
1267 | static void __exit cls_fl_exit(void) | |
1268 | { | |
1269 | unregister_tcf_proto_ops(&cls_fl_ops); | |
1270 | } | |
1271 | ||
1272 | module_init(cls_fl_init); | |
1273 | module_exit(cls_fl_exit); | |
1274 | ||
1275 | MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); | |
1276 | MODULE_DESCRIPTION("Flower classifier"); | |
1277 | MODULE_LICENSE("GPL v2"); |