blob: caa5e18636dfd830e59295ab74d80ffd95bf3f22 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __NET_PKT_CLS_H
2#define __NET_PKT_CLS_H
3
4#include <linux/pkt_cls.h>
5#include <net/sch_generic.h>
6#include <net/act_api.h>
7
8/* Basic packet classifier frontend definitions. */
9
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000010struct tcf_walker {
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 int stop;
12 int skip;
13 int count;
14 int (*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *);
15};
16
Joe Perches5c152572013-07-30 22:47:13 -070017int register_tcf_proto_ops(struct tcf_proto_ops *ops);
18int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
20static inline unsigned long
21__cls_set_class(unsigned long *clp, unsigned long cl)
22{
WANG Conga0efb802014-09-30 16:07:24 -070023 return xchg(clp, cl);
Linus Torvalds1da177e2005-04-16 15:20:36 -070024}
25
26static inline unsigned long
27cls_set_class(struct tcf_proto *tp, unsigned long *clp,
28 unsigned long cl)
29{
30 unsigned long old_cl;
31
32 tcf_tree_lock(tp);
33 old_cl = __cls_set_class(clp, cl);
34 tcf_tree_unlock(tp);
35
36 return old_cl;
37}
38
39static inline void
40tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
41{
42 unsigned long cl;
43
44 cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid);
45 cl = cls_set_class(tp, &r->class, cl);
46 if (cl)
47 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
48}
49
50static inline void
51tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
52{
53 unsigned long cl;
54
55 if ((cl = __cls_set_class(&r->class, 0)) != 0)
56 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
57}
58
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000059struct tcf_exts {
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#ifdef CONFIG_NET_CLS_ACT
WANG Cong33be6272013-12-15 20:15:05 -080061 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
62 struct list_head actions;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#endif
WANG Cong5da57f42013-12-15 20:15:07 -080064 /* Map to export classifier specific extension TLV types to the
65 * generic extensions API. Unsupported extensions must be set to 0.
66 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 int action;
68 int police;
69};
70
WANG Cong5da57f42013-12-15 20:15:07 -080071static inline void tcf_exts_init(struct tcf_exts *exts, int action, int police)
WANG Cong33be6272013-12-15 20:15:05 -080072{
73#ifdef CONFIG_NET_CLS_ACT
WANG Cong5da57f42013-12-15 20:15:07 -080074 exts->type = 0;
WANG Cong33be6272013-12-15 20:15:05 -080075 INIT_LIST_HEAD(&exts->actions);
76#endif
WANG Cong5da57f42013-12-15 20:15:07 -080077 exts->action = action;
78 exts->police = police;
WANG Cong33be6272013-12-15 20:15:05 -080079}
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081/**
82 * tcf_exts_is_predicative - check if a predicative extension is present
83 * @exts: tc filter extensions handle
84 *
85 * Returns 1 if a predicative extension is present, i.e. an extension which
86 * might cause further actions and thus overrule the regular tcf_result.
87 */
88static inline int
89tcf_exts_is_predicative(struct tcf_exts *exts)
90{
91#ifdef CONFIG_NET_CLS_ACT
WANG Cong33be6272013-12-15 20:15:05 -080092 return !list_empty(&exts->actions);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093#else
94 return 0;
95#endif
96}
97
98/**
99 * tcf_exts_is_available - check if at least one extension is present
100 * @exts: tc filter extensions handle
101 *
102 * Returns 1 if at least one extension is present.
103 */
104static inline int
105tcf_exts_is_available(struct tcf_exts *exts)
106{
107 /* All non-predicative extensions must be added here. */
108 return tcf_exts_is_predicative(exts);
109}
110
111/**
112 * tcf_exts_exec - execute tc filter extensions
113 * @skb: socket buffer
114 * @exts: tc filter extensions handle
115 * @res: desired result
116 *
117 * Executes all configured extensions. Returns 0 on a normal execution,
118 * a negative number if the filter must be considered unmatched or
119 * a positive action code (TC_ACT_*) which must be returned to the
120 * underlying layer.
121 */
122static inline int
123tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
124 struct tcf_result *res)
125{
126#ifdef CONFIG_NET_CLS_ACT
WANG Cong33be6272013-12-15 20:15:05 -0800127 if (!list_empty(&exts->actions))
128 return tcf_action_exec(skb, &exts->actions, res);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 return 0;
131}
132
Joe Perches5c152572013-07-30 22:47:13 -0700133int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
134 struct nlattr **tb, struct nlattr *rate_tlv,
Cong Wang2f7ef2f2014-04-25 13:54:06 -0700135 struct tcf_exts *exts, bool ovr);
WANG Cong18d02642014-09-25 10:26:37 -0700136void tcf_exts_destroy(struct tcf_exts *exts);
Joe Perches5c152572013-07-30 22:47:13 -0700137void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
138 struct tcf_exts *src);
WANG Cong5da57f42013-12-15 20:15:07 -0800139int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
140int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142/**
143 * struct tcf_pkt_info - packet information
144 */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000145struct tcf_pkt_info {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 unsigned char * ptr;
147 int nexthdr;
148};
149
150#ifdef CONFIG_NET_EMATCH
151
152struct tcf_ematch_ops;
153
154/**
155 * struct tcf_ematch - extended match (ematch)
156 *
157 * @matchid: identifier to allow userspace to reidentify a match
158 * @flags: flags specifying attributes and the relation to other matches
159 * @ops: the operations lookup table of the corresponding ematch module
160 * @datalen: length of the ematch specific configuration data
161 * @data: ematch specific data
162 */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000163struct tcf_ematch {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 struct tcf_ematch_ops * ops;
165 unsigned long data;
166 unsigned int datalen;
167 u16 matchid;
168 u16 flags;
John Fastabend82a470f2014-10-05 21:27:53 -0700169 struct net *net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170};
171
172static inline int tcf_em_is_container(struct tcf_ematch *em)
173{
174 return !em->ops;
175}
176
177static inline int tcf_em_is_simple(struct tcf_ematch *em)
178{
179 return em->flags & TCF_EM_SIMPLE;
180}
181
182static inline int tcf_em_is_inverted(struct tcf_ematch *em)
183{
184 return em->flags & TCF_EM_INVERT;
185}
186
187static inline int tcf_em_last_match(struct tcf_ematch *em)
188{
189 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
190}
191
192static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
193{
194 if (tcf_em_last_match(em))
195 return 1;
196
197 if (result == 0 && em->flags & TCF_EM_REL_AND)
198 return 1;
199
200 if (result != 0 && em->flags & TCF_EM_REL_OR)
201 return 1;
202
203 return 0;
204}
205
206/**
207 * struct tcf_ematch_tree - ematch tree handle
208 *
209 * @hdr: ematch tree header supplied by userspace
210 * @matches: array of ematches
211 */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000212struct tcf_ematch_tree {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 struct tcf_ematch_tree_hdr hdr;
214 struct tcf_ematch * matches;
215
216};
217
218/**
219 * struct tcf_ematch_ops - ematch module operations
220 *
221 * @kind: identifier (kind) of this ematch module
222 * @datalen: length of expected configuration data (optional)
223 * @change: called during validation (optional)
224 * @match: called during ematch tree evaluation, must return 1/0
225 * @destroy: called during destroyage (optional)
226 * @dump: called during dumping process (optional)
227 * @owner: owner, must be set to THIS_MODULE
228 * @link: link to previous/next ematch module (internal use)
229 */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000230struct tcf_ematch_ops {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 int kind;
232 int datalen;
John Fastabend82a470f2014-10-05 21:27:53 -0700233 int (*change)(struct net *net, void *,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 int, struct tcf_ematch *);
235 int (*match)(struct sk_buff *, struct tcf_ematch *,
236 struct tcf_pkt_info *);
John Fastabend82a470f2014-10-05 21:27:53 -0700237 void (*destroy)(struct tcf_ematch *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 int (*dump)(struct sk_buff *, struct tcf_ematch *);
239 struct module *owner;
240 struct list_head link;
241};
242
Joe Perches5c152572013-07-30 22:47:13 -0700243int tcf_em_register(struct tcf_ematch_ops *);
244void tcf_em_unregister(struct tcf_ematch_ops *);
245int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
246 struct tcf_ematch_tree *);
John Fastabend82a470f2014-10-05 21:27:53 -0700247void tcf_em_tree_destroy(struct tcf_ematch_tree *);
Joe Perches5c152572013-07-30 22:47:13 -0700248int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
249int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
250 struct tcf_pkt_info *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252/**
253 * tcf_em_tree_change - replace ematch tree of a running classifier
254 *
255 * @tp: classifier kind handle
256 * @dst: destination ematch tree variable
257 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
258 *
259 * This functions replaces the ematch tree in @dst with the ematch
260 * tree in @src. The classifier in charge of the ematch tree may be
261 * running.
262 */
263static inline void tcf_em_tree_change(struct tcf_proto *tp,
264 struct tcf_ematch_tree *dst,
265 struct tcf_ematch_tree *src)
266{
267 tcf_tree_lock(tp);
268 memcpy(dst, src, sizeof(*dst));
269 tcf_tree_unlock(tp);
270}
271
272/**
273 * tcf_em_tree_match - evaulate an ematch tree
274 *
275 * @skb: socket buffer of the packet in question
276 * @tree: ematch tree to be used for evaluation
277 * @info: packet information examined by classifier
278 *
279 * This function matches @skb against the ematch tree in @tree by going
280 * through all ematches respecting their logic relations returning
281 * as soon as the result is obvious.
282 *
283 * Returns 1 if the ematch tree as-one matches, no ematches are configured
284 * or ematch is not enabled in the kernel, otherwise 0 is returned.
285 */
286static inline int tcf_em_tree_match(struct sk_buff *skb,
287 struct tcf_ematch_tree *tree,
288 struct tcf_pkt_info *info)
289{
290 if (tree->hdr.nmatches)
291 return __tcf_em_tree_match(skb, tree, info);
292 else
293 return 1;
294}
295
Patrick McHardydb3d99c2007-07-11 19:46:26 -0700296#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
297
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298#else /* CONFIG_NET_EMATCH */
299
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000300struct tcf_ematch_tree {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301};
302
303#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
John Fastabend82a470f2014-10-05 21:27:53 -0700304#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305#define tcf_em_tree_dump(skb, t, tlv) (0)
306#define tcf_em_tree_change(tp, dst, src) do { } while(0)
307#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
308
309#endif /* CONFIG_NET_EMATCH */
310
311static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
312{
313 switch (layer) {
314 case TCF_LAYER_LINK:
315 return skb->data;
316 case TCF_LAYER_NETWORK:
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700317 return skb_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 case TCF_LAYER_TRANSPORT:
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -0700319 return skb_transport_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 }
321
322 return NULL;
323}
324
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700325static inline int tcf_valid_offset(const struct sk_buff *skb,
326 const unsigned char *ptr, const int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327{
David S. Millerda521b22010-12-21 12:43:16 -0800328 return likely((ptr + len) <= skb_tail_pointer(skb) &&
329 ptr >= skb->head &&
330 (ptr <= (ptr + len)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331}
332
333#ifdef CONFIG_NET_CLS_IND
Denis V. Lunev0eeb8ff2007-12-04 01:15:45 -0800334#include <net/net_namespace.h>
335
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336static inline int
WANG Cong2519a602014-01-09 16:14:02 -0800337tcf_change_indev(struct net *net, struct nlattr *indev_tlv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338{
WANG Cong2519a602014-01-09 16:14:02 -0800339 char indev[IFNAMSIZ];
Patrick McHardyc01003c2007-03-29 11:46:52 -0700340 struct net_device *dev;
341
WANG Cong2519a602014-01-09 16:14:02 -0800342 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
343 return -EINVAL;
344 dev = __dev_get_by_name(net, indev);
345 if (!dev)
346 return -ENODEV;
347 return dev->ifindex;
348}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
WANG Cong2519a602014-01-09 16:14:02 -0800350static inline bool
351tcf_match_indev(struct sk_buff *skb, int ifindex)
352{
353 if (!ifindex)
354 return true;
355 if (!skb->skb_iif)
356 return false;
357 return ifindex == skb->skb_iif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358}
359#endif /* CONFIG_NET_CLS_IND */
360
John Fastabenda1b7c5f2016-02-16 21:17:09 -0800361struct tc_cls_u32_knode {
362 struct tcf_exts *exts;
John Fastabende0148602016-02-17 14:59:30 -0800363 struct tc_u32_sel *sel;
John Fastabenda1b7c5f2016-02-16 21:17:09 -0800364 u32 handle;
365 u32 val;
366 u32 mask;
367 u32 link_handle;
John Fastabende0148602016-02-17 14:59:30 -0800368 u8 fshift;
John Fastabenda1b7c5f2016-02-16 21:17:09 -0800369};
370
371struct tc_cls_u32_hnode {
372 u32 handle;
373 u32 prio;
374 unsigned int divisor;
375};
376
377enum tc_clsu32_command {
378 TC_CLSU32_NEW_KNODE,
379 TC_CLSU32_REPLACE_KNODE,
380 TC_CLSU32_DELETE_KNODE,
381 TC_CLSU32_NEW_HNODE,
382 TC_CLSU32_REPLACE_HNODE,
383 TC_CLSU32_DELETE_HNODE,
384};
385
386struct tc_cls_u32_offload {
387 /* knode values */
388 enum tc_clsu32_command command;
389 union {
390 struct tc_cls_u32_knode knode;
391 struct tc_cls_u32_hnode hnode;
392 };
393};
394
John Fastabend9e8ce792016-02-26 07:54:39 -0800395/* tca flags definitions */
396#define TCA_CLS_FLAGS_SKIP_HW 1
397
398static inline bool tc_should_offload(struct net_device *dev, u32 flags)
John Fastabend6843e7a2016-02-26 07:53:49 -0800399{
John Fastabend2b6ab0d2016-02-26 07:54:13 -0800400 if (!(dev->features & NETIF_F_HW_TC))
401 return false;
402
John Fastabend9e8ce792016-02-26 07:54:39 -0800403 if (flags & TCA_CLS_FLAGS_SKIP_HW)
404 return false;
405
406 if (!dev->netdev_ops->ndo_setup_tc)
407 return false;
408
409 return true;
John Fastabend6843e7a2016-02-26 07:53:49 -0800410}
411
Amir Vadai5b33f482016-03-08 12:42:29 +0200412enum tc_fl_command {
413 TC_CLSFLOWER_REPLACE,
414 TC_CLSFLOWER_DESTROY,
415};
416
417struct tc_cls_flower_offload {
418 enum tc_fl_command command;
Amir Vadai8208d212016-03-11 11:08:45 +0200419 unsigned long cookie;
Amir Vadai5b33f482016-03-08 12:42:29 +0200420 struct flow_dissector *dissector;
421 struct fl_flow_key *mask;
422 struct fl_flow_key *key;
423 struct tcf_exts *exts;
424};
425
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426#endif