3d54b82fdf
Adds qdisc_alloc() to share code between qdisc_create() and qdisc_create_dflt(). Hides the qdisc alignment behind macros and makes use of them. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
311 lines
7.4 KiB
C
311 lines
7.4 KiB
C
#ifndef __NET_SCHED_GENERIC_H
|
|
#define __NET_SCHED_GENERIC_H
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/types.h>
|
|
#include <linux/rcupdate.h>
|
|
#include <linux/module.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <linux/pkt_sched.h>
|
|
#include <linux/pkt_cls.h>
|
|
#include <net/gen_stats.h>
|
|
|
|
struct Qdisc_ops;
|
|
struct qdisc_walker;
|
|
struct tcf_walker;
|
|
struct module;
|
|
|
|
struct qdisc_rate_table
|
|
{
|
|
struct tc_ratespec rate;
|
|
u32 data[256];
|
|
struct qdisc_rate_table *next;
|
|
int refcnt;
|
|
};
|
|
|
|
struct Qdisc
|
|
{
|
|
int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev);
|
|
struct sk_buff * (*dequeue)(struct Qdisc *dev);
|
|
unsigned flags;
|
|
#define TCQ_F_BUILTIN 1
|
|
#define TCQ_F_THROTTLED 2
|
|
#define TCQ_F_INGRESS 4
|
|
int padded;
|
|
struct Qdisc_ops *ops;
|
|
u32 handle;
|
|
u32 parent;
|
|
atomic_t refcnt;
|
|
struct sk_buff_head q;
|
|
struct net_device *dev;
|
|
struct list_head list;
|
|
|
|
struct gnet_stats_basic bstats;
|
|
struct gnet_stats_queue qstats;
|
|
struct gnet_stats_rate_est rate_est;
|
|
spinlock_t *stats_lock;
|
|
struct rcu_head q_rcu;
|
|
int (*reshape_fail)(struct sk_buff *skb,
|
|
struct Qdisc *q);
|
|
|
|
/* This field is deprecated, but it is still used by CBQ
|
|
* and it will live until better solution will be invented.
|
|
*/
|
|
struct Qdisc *__parent;
|
|
};
|
|
|
|
struct Qdisc_class_ops
|
|
{
|
|
/* Child qdisc manipulation */
|
|
int (*graft)(struct Qdisc *, unsigned long cl,
|
|
struct Qdisc *, struct Qdisc **);
|
|
struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl);
|
|
|
|
/* Class manipulation routines */
|
|
unsigned long (*get)(struct Qdisc *, u32 classid);
|
|
void (*put)(struct Qdisc *, unsigned long);
|
|
int (*change)(struct Qdisc *, u32, u32,
|
|
struct rtattr **, unsigned long *);
|
|
int (*delete)(struct Qdisc *, unsigned long);
|
|
void (*walk)(struct Qdisc *, struct qdisc_walker * arg);
|
|
|
|
/* Filter manipulation */
|
|
struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long);
|
|
unsigned long (*bind_tcf)(struct Qdisc *, unsigned long,
|
|
u32 classid);
|
|
void (*unbind_tcf)(struct Qdisc *, unsigned long);
|
|
|
|
/* rtnetlink specific */
|
|
int (*dump)(struct Qdisc *, unsigned long,
|
|
struct sk_buff *skb, struct tcmsg*);
|
|
int (*dump_stats)(struct Qdisc *, unsigned long,
|
|
struct gnet_dump *);
|
|
};
|
|
|
|
struct Qdisc_ops
|
|
{
|
|
struct Qdisc_ops *next;
|
|
struct Qdisc_class_ops *cl_ops;
|
|
char id[IFNAMSIZ];
|
|
int priv_size;
|
|
|
|
int (*enqueue)(struct sk_buff *, struct Qdisc *);
|
|
struct sk_buff * (*dequeue)(struct Qdisc *);
|
|
int (*requeue)(struct sk_buff *, struct Qdisc *);
|
|
unsigned int (*drop)(struct Qdisc *);
|
|
|
|
int (*init)(struct Qdisc *, struct rtattr *arg);
|
|
void (*reset)(struct Qdisc *);
|
|
void (*destroy)(struct Qdisc *);
|
|
int (*change)(struct Qdisc *, struct rtattr *arg);
|
|
|
|
int (*dump)(struct Qdisc *, struct sk_buff *);
|
|
int (*dump_stats)(struct Qdisc *, struct gnet_dump *);
|
|
|
|
struct module *owner;
|
|
};
|
|
|
|
|
|
struct tcf_result
|
|
{
|
|
unsigned long class;
|
|
u32 classid;
|
|
};
|
|
|
|
struct tcf_proto_ops
|
|
{
|
|
struct tcf_proto_ops *next;
|
|
char kind[IFNAMSIZ];
|
|
|
|
int (*classify)(struct sk_buff*, struct tcf_proto*,
|
|
struct tcf_result *);
|
|
int (*init)(struct tcf_proto*);
|
|
void (*destroy)(struct tcf_proto*);
|
|
|
|
unsigned long (*get)(struct tcf_proto*, u32 handle);
|
|
void (*put)(struct tcf_proto*, unsigned long);
|
|
int (*change)(struct tcf_proto*, unsigned long,
|
|
u32 handle, struct rtattr **,
|
|
unsigned long *);
|
|
int (*delete)(struct tcf_proto*, unsigned long);
|
|
void (*walk)(struct tcf_proto*, struct tcf_walker *arg);
|
|
|
|
/* rtnetlink specific */
|
|
int (*dump)(struct tcf_proto*, unsigned long,
|
|
struct sk_buff *skb, struct tcmsg*);
|
|
|
|
struct module *owner;
|
|
};
|
|
|
|
struct tcf_proto
|
|
{
|
|
/* Fast access part */
|
|
struct tcf_proto *next;
|
|
void *root;
|
|
int (*classify)(struct sk_buff*, struct tcf_proto*,
|
|
struct tcf_result *);
|
|
u32 protocol;
|
|
|
|
/* All the rest */
|
|
u32 prio;
|
|
u32 classid;
|
|
struct Qdisc *q;
|
|
void *data;
|
|
struct tcf_proto_ops *ops;
|
|
};
|
|
|
|
|
|
extern void qdisc_lock_tree(struct net_device *dev);
|
|
extern void qdisc_unlock_tree(struct net_device *dev);
|
|
|
|
#define sch_tree_lock(q) qdisc_lock_tree((q)->dev)
|
|
#define sch_tree_unlock(q) qdisc_unlock_tree((q)->dev)
|
|
#define tcf_tree_lock(tp) qdisc_lock_tree((tp)->q->dev)
|
|
#define tcf_tree_unlock(tp) qdisc_unlock_tree((tp)->q->dev)
|
|
|
|
extern struct Qdisc noop_qdisc;
|
|
extern struct Qdisc_ops noop_qdisc_ops;
|
|
|
|
extern void dev_init_scheduler(struct net_device *dev);
|
|
extern void dev_shutdown(struct net_device *dev);
|
|
extern void dev_activate(struct net_device *dev);
|
|
extern void dev_deactivate(struct net_device *dev);
|
|
extern void qdisc_reset(struct Qdisc *qdisc);
|
|
extern void qdisc_destroy(struct Qdisc *qdisc);
|
|
extern struct Qdisc *qdisc_alloc(struct net_device *dev, struct Qdisc_ops *ops);
|
|
extern struct Qdisc *qdisc_create_dflt(struct net_device *dev,
|
|
struct Qdisc_ops *ops);
|
|
|
|
static inline void
|
|
tcf_destroy(struct tcf_proto *tp)
|
|
{
|
|
tp->ops->destroy(tp);
|
|
module_put(tp->ops->owner);
|
|
kfree(tp);
|
|
}
|
|
|
|
static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,
|
|
struct sk_buff_head *list)
|
|
{
|
|
__skb_queue_tail(list, skb);
|
|
sch->qstats.backlog += skb->len;
|
|
sch->bstats.bytes += skb->len;
|
|
sch->bstats.packets++;
|
|
|
|
return NET_XMIT_SUCCESS;
|
|
}
|
|
|
|
static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch)
|
|
{
|
|
return __qdisc_enqueue_tail(skb, sch, &sch->q);
|
|
}
|
|
|
|
static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch,
|
|
struct sk_buff_head *list)
|
|
{
|
|
struct sk_buff *skb = __skb_dequeue(list);
|
|
|
|
if (likely(skb != NULL))
|
|
sch->qstats.backlog -= skb->len;
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch)
|
|
{
|
|
return __qdisc_dequeue_head(sch, &sch->q);
|
|
}
|
|
|
|
static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch,
|
|
struct sk_buff_head *list)
|
|
{
|
|
struct sk_buff *skb = __skb_dequeue_tail(list);
|
|
|
|
if (likely(skb != NULL))
|
|
sch->qstats.backlog -= skb->len;
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch)
|
|
{
|
|
return __qdisc_dequeue_tail(sch, &sch->q);
|
|
}
|
|
|
|
static inline int __qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch,
|
|
struct sk_buff_head *list)
|
|
{
|
|
__skb_queue_head(list, skb);
|
|
sch->qstats.backlog += skb->len;
|
|
sch->qstats.requeues++;
|
|
|
|
return NET_XMIT_SUCCESS;
|
|
}
|
|
|
|
static inline int qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch)
|
|
{
|
|
return __qdisc_requeue(skb, sch, &sch->q);
|
|
}
|
|
|
|
static inline void __qdisc_reset_queue(struct Qdisc *sch,
|
|
struct sk_buff_head *list)
|
|
{
|
|
/*
|
|
* We do not know the backlog in bytes of this list, it
|
|
* is up to the caller to correct it
|
|
*/
|
|
skb_queue_purge(list);
|
|
}
|
|
|
|
static inline void qdisc_reset_queue(struct Qdisc *sch)
|
|
{
|
|
__qdisc_reset_queue(sch, &sch->q);
|
|
sch->qstats.backlog = 0;
|
|
}
|
|
|
|
static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
|
|
struct sk_buff_head *list)
|
|
{
|
|
struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
|
|
|
|
if (likely(skb != NULL)) {
|
|
unsigned int len = skb->len;
|
|
kfree_skb(skb);
|
|
return len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
|
|
{
|
|
return __qdisc_queue_drop(sch, &sch->q);
|
|
}
|
|
|
|
static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch)
|
|
{
|
|
kfree_skb(skb);
|
|
sch->qstats.drops++;
|
|
|
|
return NET_XMIT_DROP;
|
|
}
|
|
|
|
static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch)
|
|
{
|
|
sch->qstats.drops++;
|
|
|
|
#ifdef CONFIG_NET_CLS_POLICE
|
|
if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch))
|
|
goto drop;
|
|
|
|
return NET_XMIT_SUCCESS;
|
|
|
|
drop:
|
|
#endif
|
|
kfree_skb(skb);
|
|
return NET_XMIT_DROP;
|
|
}
|
|
|
|
#endif
|