1 #ifndef __NET_PKT_CLS_H
2 #define __NET_PKT_CLS_H
4 #include <linux/pkt_cls.h>
5 #include <net/sch_generic.h>
6 #include <net/act_api.h>
8 /* Basic packet classifier frontend definitions. */
14 int (*fn
)(struct tcf_proto
*, unsigned long node
, struct tcf_walker
*);
17 int register_tcf_proto_ops(struct tcf_proto_ops
*ops
);
18 int unregister_tcf_proto_ops(struct tcf_proto_ops
*ops
);
21 int tcf_block_get(struct tcf_block
**p_block
,
22 struct tcf_proto __rcu
**p_filter_chain
);
23 void tcf_block_put(struct tcf_block
*block
);
24 int tcf_classify(struct sk_buff
*skb
, const struct tcf_proto
*tp
,
25 struct tcf_result
*res
, bool compat_mode
);
29 int tcf_block_get(struct tcf_block
**p_block
,
30 struct tcf_proto __rcu
**p_filter_chain
)
35 static inline void tcf_block_put(struct tcf_block
*block
)
39 static inline int tcf_classify(struct sk_buff
*skb
, const struct tcf_proto
*tp
,
40 struct tcf_result
*res
, bool compat_mode
)
46 static inline unsigned long
47 __cls_set_class(unsigned long *clp
, unsigned long cl
)
52 static inline unsigned long
53 cls_set_class(struct tcf_proto
*tp
, unsigned long *clp
,
59 old_cl
= __cls_set_class(clp
, cl
);
66 tcf_bind_filter(struct tcf_proto
*tp
, struct tcf_result
*r
, unsigned long base
)
70 cl
= tp
->q
->ops
->cl_ops
->bind_tcf(tp
->q
, base
, r
->classid
);
71 cl
= cls_set_class(tp
, &r
->class, cl
);
73 tp
->q
->ops
->cl_ops
->unbind_tcf(tp
->q
, cl
);
77 tcf_unbind_filter(struct tcf_proto
*tp
, struct tcf_result
*r
)
81 if ((cl
= __cls_set_class(&r
->class, 0)) != 0)
82 tp
->q
->ops
->cl_ops
->unbind_tcf(tp
->q
, cl
);
86 #ifdef CONFIG_NET_CLS_ACT
87 __u32 type
; /* for backward compat(TCA_OLD_COMPAT) */
89 struct tc_action
**actions
;
91 /* Map to export classifier specific extension TLV types to the
92 * generic extensions API. Unsupported extensions must be set to 0.
98 static inline int tcf_exts_init(struct tcf_exts
*exts
, int action
, int police
)
100 #ifdef CONFIG_NET_CLS_ACT
102 exts
->nr_actions
= 0;
103 exts
->actions
= kcalloc(TCA_ACT_MAX_PRIO
, sizeof(struct tc_action
*),
108 exts
->action
= action
;
109 exts
->police
= police
;
114 * tcf_exts_is_predicative - check if a predicative extension is present
115 * @exts: tc filter extensions handle
117 * Returns 1 if a predicative extension is present, i.e. an extension which
118 * might cause further actions and thus overrule the regular tcf_result.
121 tcf_exts_is_predicative(struct tcf_exts
*exts
)
123 #ifdef CONFIG_NET_CLS_ACT
124 return exts
->nr_actions
;
131 * tcf_exts_is_available - check if at least one extension is present
132 * @exts: tc filter extensions handle
134 * Returns 1 if at least one extension is present.
137 tcf_exts_is_available(struct tcf_exts
*exts
)
139 /* All non-predicative extensions must be added here. */
140 return tcf_exts_is_predicative(exts
);
143 static inline void tcf_exts_to_list(const struct tcf_exts
*exts
,
144 struct list_head
*actions
)
146 #ifdef CONFIG_NET_CLS_ACT
149 for (i
= 0; i
< exts
->nr_actions
; i
++) {
150 struct tc_action
*a
= exts
->actions
[i
];
152 list_add_tail(&a
->list
, actions
);
158 * tcf_exts_exec - execute tc filter extensions
159 * @skb: socket buffer
160 * @exts: tc filter extensions handle
161 * @res: desired result
163 * Executes all configured extensions. Returns 0 on a normal execution,
164 * a negative number if the filter must be considered unmatched or
165 * a positive action code (TC_ACT_*) which must be returned to the
169 tcf_exts_exec(struct sk_buff
*skb
, struct tcf_exts
*exts
,
170 struct tcf_result
*res
)
172 #ifdef CONFIG_NET_CLS_ACT
173 if (exts
->nr_actions
)
174 return tcf_action_exec(skb
, exts
->actions
, exts
->nr_actions
,
180 #ifdef CONFIG_NET_CLS_ACT
182 #define tc_no_actions(_exts) ((_exts)->nr_actions == 0)
183 #define tc_single_action(_exts) ((_exts)->nr_actions == 1)
185 #else /* CONFIG_NET_CLS_ACT */
187 #define tc_no_actions(_exts) true
188 #define tc_single_action(_exts) false
190 #endif /* CONFIG_NET_CLS_ACT */
192 int tcf_exts_validate(struct net
*net
, struct tcf_proto
*tp
,
193 struct nlattr
**tb
, struct nlattr
*rate_tlv
,
194 struct tcf_exts
*exts
, bool ovr
);
195 void tcf_exts_destroy(struct tcf_exts
*exts
);
196 void tcf_exts_change(struct tcf_proto
*tp
, struct tcf_exts
*dst
,
197 struct tcf_exts
*src
);
198 int tcf_exts_dump(struct sk_buff
*skb
, struct tcf_exts
*exts
);
199 int tcf_exts_dump_stats(struct sk_buff
*skb
, struct tcf_exts
*exts
);
200 int tcf_exts_get_dev(struct net_device
*dev
, struct tcf_exts
*exts
,
201 struct net_device
**hw_dev
);
204 * struct tcf_pkt_info - packet information
206 struct tcf_pkt_info
{
211 #ifdef CONFIG_NET_EMATCH
213 struct tcf_ematch_ops
;
216 * struct tcf_ematch - extended match (ematch)
218 * @matchid: identifier to allow userspace to reidentify a match
219 * @flags: flags specifying attributes and the relation to other matches
220 * @ops: the operations lookup table of the corresponding ematch module
221 * @datalen: length of the ematch specific configuration data
222 * @data: ematch specific data
225 struct tcf_ematch_ops
* ops
;
227 unsigned int datalen
;
233 static inline int tcf_em_is_container(struct tcf_ematch
*em
)
238 static inline int tcf_em_is_simple(struct tcf_ematch
*em
)
240 return em
->flags
& TCF_EM_SIMPLE
;
243 static inline int tcf_em_is_inverted(struct tcf_ematch
*em
)
245 return em
->flags
& TCF_EM_INVERT
;
248 static inline int tcf_em_last_match(struct tcf_ematch
*em
)
250 return (em
->flags
& TCF_EM_REL_MASK
) == TCF_EM_REL_END
;
253 static inline int tcf_em_early_end(struct tcf_ematch
*em
, int result
)
255 if (tcf_em_last_match(em
))
258 if (result
== 0 && em
->flags
& TCF_EM_REL_AND
)
261 if (result
!= 0 && em
->flags
& TCF_EM_REL_OR
)
268 * struct tcf_ematch_tree - ematch tree handle
270 * @hdr: ematch tree header supplied by userspace
271 * @matches: array of ematches
273 struct tcf_ematch_tree
{
274 struct tcf_ematch_tree_hdr hdr
;
275 struct tcf_ematch
* matches
;
280 * struct tcf_ematch_ops - ematch module operations
282 * @kind: identifier (kind) of this ematch module
283 * @datalen: length of expected configuration data (optional)
284 * @change: called during validation (optional)
285 * @match: called during ematch tree evaluation, must return 1/0
286 * @destroy: called during destroyage (optional)
287 * @dump: called during dumping process (optional)
288 * @owner: owner, must be set to THIS_MODULE
289 * @link: link to previous/next ematch module (internal use)
291 struct tcf_ematch_ops
{
294 int (*change
)(struct net
*net
, void *,
295 int, struct tcf_ematch
*);
296 int (*match
)(struct sk_buff
*, struct tcf_ematch
*,
297 struct tcf_pkt_info
*);
298 void (*destroy
)(struct tcf_ematch
*);
299 int (*dump
)(struct sk_buff
*, struct tcf_ematch
*);
300 struct module
*owner
;
301 struct list_head link
;
304 int tcf_em_register(struct tcf_ematch_ops
*);
305 void tcf_em_unregister(struct tcf_ematch_ops
*);
306 int tcf_em_tree_validate(struct tcf_proto
*, struct nlattr
*,
307 struct tcf_ematch_tree
*);
308 void tcf_em_tree_destroy(struct tcf_ematch_tree
*);
309 int tcf_em_tree_dump(struct sk_buff
*, struct tcf_ematch_tree
*, int);
310 int __tcf_em_tree_match(struct sk_buff
*, struct tcf_ematch_tree
*,
311 struct tcf_pkt_info
*);
314 * tcf_em_tree_change - replace ematch tree of a running classifier
316 * @tp: classifier kind handle
317 * @dst: destination ematch tree variable
318 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
320 * This functions replaces the ematch tree in @dst with the ematch
321 * tree in @src. The classifier in charge of the ematch tree may be
324 static inline void tcf_em_tree_change(struct tcf_proto
*tp
,
325 struct tcf_ematch_tree
*dst
,
326 struct tcf_ematch_tree
*src
)
329 memcpy(dst
, src
, sizeof(*dst
));
334 * tcf_em_tree_match - evaulate an ematch tree
336 * @skb: socket buffer of the packet in question
337 * @tree: ematch tree to be used for evaluation
338 * @info: packet information examined by classifier
340 * This function matches @skb against the ematch tree in @tree by going
341 * through all ematches respecting their logic relations returning
342 * as soon as the result is obvious.
344 * Returns 1 if the ematch tree as-one matches, no ematches are configured
345 * or ematch is not enabled in the kernel, otherwise 0 is returned.
347 static inline int tcf_em_tree_match(struct sk_buff
*skb
,
348 struct tcf_ematch_tree
*tree
,
349 struct tcf_pkt_info
*info
)
351 if (tree
->hdr
.nmatches
)
352 return __tcf_em_tree_match(skb
, tree
, info
);
357 #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
359 #else /* CONFIG_NET_EMATCH */
361 struct tcf_ematch_tree
{
364 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
365 #define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
366 #define tcf_em_tree_dump(skb, t, tlv) (0)
367 #define tcf_em_tree_change(tp, dst, src) do { } while(0)
368 #define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
370 #endif /* CONFIG_NET_EMATCH */
372 static inline unsigned char * tcf_get_base_ptr(struct sk_buff
*skb
, int layer
)
377 case TCF_LAYER_NETWORK
:
378 return skb_network_header(skb
);
379 case TCF_LAYER_TRANSPORT
:
380 return skb_transport_header(skb
);
386 static inline int tcf_valid_offset(const struct sk_buff
*skb
,
387 const unsigned char *ptr
, const int len
)
389 return likely((ptr
+ len
) <= skb_tail_pointer(skb
) &&
391 (ptr
<= (ptr
+ len
)));
394 #ifdef CONFIG_NET_CLS_IND
395 #include <net/net_namespace.h>
398 tcf_change_indev(struct net
*net
, struct nlattr
*indev_tlv
)
400 char indev
[IFNAMSIZ
];
401 struct net_device
*dev
;
403 if (nla_strlcpy(indev
, indev_tlv
, IFNAMSIZ
) >= IFNAMSIZ
)
405 dev
= __dev_get_by_name(net
, indev
);
412 tcf_match_indev(struct sk_buff
*skb
, int ifindex
)
418 return ifindex
== skb
->skb_iif
;
420 #endif /* CONFIG_NET_CLS_IND */
422 struct tc_cls_u32_knode
{
423 struct tcf_exts
*exts
;
424 struct tc_u32_sel
*sel
;
432 struct tc_cls_u32_hnode
{
435 unsigned int divisor
;
438 enum tc_clsu32_command
{
440 TC_CLSU32_REPLACE_KNODE
,
441 TC_CLSU32_DELETE_KNODE
,
443 TC_CLSU32_REPLACE_HNODE
,
444 TC_CLSU32_DELETE_HNODE
,
447 struct tc_cls_u32_offload
{
449 enum tc_clsu32_command command
;
451 struct tc_cls_u32_knode knode
;
452 struct tc_cls_u32_hnode hnode
;
456 static inline bool tc_can_offload(const struct net_device
*dev
,
457 const struct tcf_proto
*tp
)
459 const struct Qdisc
*sch
= tp
->q
;
460 const struct Qdisc_class_ops
*cops
= sch
->ops
->cl_ops
;
462 if (!(dev
->features
& NETIF_F_HW_TC
))
464 if (!dev
->netdev_ops
->ndo_setup_tc
)
466 if (cops
&& cops
->tcf_cl_offload
)
467 return cops
->tcf_cl_offload(tp
->classid
);
472 static inline bool tc_skip_hw(u32 flags
)
474 return (flags
& TCA_CLS_FLAGS_SKIP_HW
) ? true : false;
477 static inline bool tc_should_offload(const struct net_device
*dev
,
478 const struct tcf_proto
*tp
, u32 flags
)
480 if (tc_skip_hw(flags
))
482 return tc_can_offload(dev
, tp
);
485 static inline bool tc_skip_sw(u32 flags
)
487 return (flags
& TCA_CLS_FLAGS_SKIP_SW
) ? true : false;
490 /* SKIP_HW and SKIP_SW are mutually exclusive flags. */
491 static inline bool tc_flags_valid(u32 flags
)
493 if (flags
& ~(TCA_CLS_FLAGS_SKIP_HW
| TCA_CLS_FLAGS_SKIP_SW
))
496 if (!(flags
^ (TCA_CLS_FLAGS_SKIP_HW
| TCA_CLS_FLAGS_SKIP_SW
)))
502 static inline bool tc_in_hw(u32 flags
)
504 return (flags
& TCA_CLS_FLAGS_IN_HW
) ? true : false;
508 TC_CLSFLOWER_REPLACE
,
509 TC_CLSFLOWER_DESTROY
,
513 struct tc_cls_flower_offload
{
514 enum tc_fl_command command
;
516 unsigned long cookie
;
517 struct flow_dissector
*dissector
;
518 struct fl_flow_key
*mask
;
519 struct fl_flow_key
*key
;
520 struct tcf_exts
*exts
;
523 enum tc_matchall_command
{
524 TC_CLSMATCHALL_REPLACE
,
525 TC_CLSMATCHALL_DESTROY
,
528 struct tc_cls_matchall_offload
{
529 enum tc_matchall_command command
;
530 struct tcf_exts
*exts
;
531 unsigned long cookie
;
534 enum tc_clsbpf_command
{
541 struct tc_cls_bpf_offload
{
542 enum tc_clsbpf_command command
;
543 struct tcf_exts
*exts
;
544 struct bpf_prog
*prog
;
546 bool exts_integrated
;
551 /* This structure holds cookie structure that is passed from user
552 * to the kernel for actions and classifiers