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linux-next/include/net/act_api.h
David S. Miller e9ce1cd3cf [PKT_SCHED]: Kill pkt_act.h inlining. 
This was simply making templates of functions and mostly causing a lot
of code duplication in the classifier action modules.

We solve this more cleanly by having a common "struct tcf_common" that
hash worker functions contained once in act_api.c can work with.

Callers work with real action objects that have the common struct
plus their module specific struct members.  You go from a common
object to the higher level one using a "to_foo()" macro which makes
use of container_of() to do the dirty work.

This also kills off act_generic.h which was only used by act_simple.c
and keeping it around was more work than the it's value.

Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-22 14:55:10 -07:00

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#ifndef __NET_ACT_API_H
#define __NET_ACT_API_H
/*
* Public police action API for classifiers/qdiscs
*/
#include <net/sch_generic.h>
#include <net/pkt_sched.h>
struct tcf_common {
struct tcf_common *tcfc_next;
u32 tcfc_index;
int tcfc_refcnt;
int tcfc_bindcnt;
u32 tcfc_capab;
int tcfc_action;
struct tcf_t tcfc_tm;
struct gnet_stats_basic tcfc_bstats;
struct gnet_stats_queue tcfc_qstats;
struct gnet_stats_rate_est tcfc_rate_est;
spinlock_t *tcfc_stats_lock;
spinlock_t tcfc_lock;
};
#define tcf_next common.tcfc_next
#define tcf_index common.tcfc_index
#define tcf_refcnt common.tcfc_refcnt
#define tcf_bindcnt common.tcfc_bindcnt
#define tcf_capab common.tcfc_capab
#define tcf_action common.tcfc_action
#define tcf_tm common.tcfc_tm
#define tcf_bstats common.tcfc_bstats
#define tcf_qstats common.tcfc_qstats
#define tcf_rate_est common.tcfc_rate_est
#define tcf_stats_lock common.tcfc_stats_lock
#define tcf_lock common.tcfc_lock
struct tcf_police {
struct tcf_common common;
int tcfp_result;
u32 tcfp_ewma_rate;
u32 tcfp_burst;
u32 tcfp_mtu;
u32 tcfp_toks;
u32 tcfp_ptoks;
psched_time_t tcfp_t_c;
struct qdisc_rate_table *tcfp_R_tab;
struct qdisc_rate_table *tcfp_P_tab;
};
#define to_police(pc) \
container_of(pc, struct tcf_police, common)
struct tcf_hashinfo {
struct tcf_common **htab;
unsigned int hmask;
rwlock_t *lock;
};
static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
{
return index & hmask;
}
#ifdef CONFIG_NET_CLS_ACT
#define ACT_P_CREATED 1
#define ACT_P_DELETED 1
struct tcf_act_hdr {
struct tcf_common common;
};
struct tc_action {
void *priv;
struct tc_action_ops *ops;
__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
__u32 order;
struct tc_action *next;
};
#define TCA_CAP_NONE 0
struct tc_action_ops {
struct tc_action_ops *next;
struct tcf_hashinfo *hinfo;
char kind[IFNAMSIZ];
__u32 type; /* TBD to match kind */
__u32 capab; /* capabilities includes 4 bit version */
struct module *owner;
int (*act)(struct sk_buff *, struct tc_action *, struct tcf_result *);
int (*get_stats)(struct sk_buff *, struct tc_action *);
int (*dump)(struct sk_buff *, struct tc_action *, int, int);
int (*cleanup)(struct tc_action *, int bind);
int (*lookup)(struct tc_action *, u32);
int (*init)(struct rtattr *, struct rtattr *, struct tc_action *, int , int);
int (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *);
};
extern struct tcf_common *tcf_hash_lookup(u32 index,
struct tcf_hashinfo *hinfo);
extern void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo);
extern int tcf_hash_release(struct tcf_common *p, int bind,
struct tcf_hashinfo *hinfo);
extern int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
int type, struct tc_action *a);
extern u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo);
extern int tcf_hash_search(struct tc_action *a, u32 index);
extern struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a,
int bind, struct tcf_hashinfo *hinfo);
extern struct tcf_common *tcf_hash_create(u32 index, struct rtattr *est,
struct tc_action *a, int size,
int bind, u32 *idx_gen,
struct tcf_hashinfo *hinfo);
extern void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo);
extern int tcf_register_action(struct tc_action_ops *a);
extern int tcf_unregister_action(struct tc_action_ops *a);
extern void tcf_action_destroy(struct tc_action *a, int bind);
extern int tcf_action_exec(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res);
extern struct tc_action *tcf_action_init(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
extern struct tc_action *tcf_action_init_1(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
extern int tcf_action_dump(struct sk_buff *skb, struct tc_action *a, int, int);
extern int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
extern int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
extern int tcf_action_copy_stats (struct sk_buff *,struct tc_action *, int);
#endif /* CONFIG_NET_CLS_ACT */
extern int tcf_police(struct sk_buff *skb, struct tcf_police *p);
extern void tcf_police_destroy(struct tcf_police *p);
extern struct tcf_police * tcf_police_locate(struct rtattr *rta, struct rtattr *est);
extern int tcf_police_dump(struct sk_buff *skb, struct tcf_police *p);
extern int tcf_police_dump_stats(struct sk_buff *skb, struct tcf_police *p);
static inline int
tcf_police_release(struct tcf_police *p, int bind)
{
int ret = 0;
#ifdef CONFIG_NET_CLS_ACT
if (p) {
if (bind)
p->tcf_bindcnt--;
p->tcf_refcnt--;
if (p->tcf_refcnt <= 0 && !p->tcf_bindcnt) {
tcf_police_destroy(p);
ret = 1;
}
}
#else
if (p && --p->tcf_refcnt == 0)
tcf_police_destroy(p);
#endif /* CONFIG_NET_CLS_ACT */
return ret;
}
#endif
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