[mirror_ubuntu-artful-kernel.git] / include / net / sch_generic.h

#ifndef __NET_SCHED_GENERIC_H
#define __NET_SCHED_GENERIC_H

#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/rcupdate.h>
#include <linux/module.h>
#include <linux/pkt_sched.h>
#include <linux/pkt_cls.h>
#include <net/gen_stats.h>
#include <net/rtnetlink.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 netdev_queue	*dev_queue;
	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);
	void			(*qlen_notify)(struct Qdisc *, unsigned long);

	/* Class manipulation routines */
	unsigned long		(*get)(struct Qdisc *, u32 classid);
	void			(*put)(struct Qdisc *, unsigned long);
	int			(*change)(struct Qdisc *, u32, u32,
					struct nlattr **, 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;
	const 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 nlattr *arg);
	void			(*reset)(struct Qdisc *);
	void			(*destroy)(struct Qdisc *);
	int			(*change)(struct Qdisc *, struct nlattr *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 nlattr **,
					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 *);
	__be16			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;

struct Qdisc_class_common
{
	u32			classid;
	struct hlist_node	hnode;
};

struct Qdisc_class_hash
{
	struct hlist_head	*hash;
	unsigned int		hashsize;
	unsigned int		hashmask;
	unsigned int		hashelems;
};

static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
{
	id ^= id >> 8;
	id ^= id >> 4;
	return id & mask;
}

static inline struct Qdisc_class_common *
qdisc_class_find(struct Qdisc_class_hash *hash, u32 id)
{
	struct Qdisc_class_common *cl;
	struct hlist_node *n;
	unsigned int h;

	h = qdisc_class_hash(id, hash->hashmask);
	hlist_for_each_entry(cl, n, &hash->hash[h], hnode) {
		if (cl->classid == id)
			return cl;
	}
	return NULL;
}

extern int qdisc_class_hash_init(struct Qdisc_class_hash *);
extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *);
extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *);
extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *);
extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *);

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 void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n);
extern struct Qdisc *qdisc_alloc(struct net_device *dev,
				 struct netdev_queue *dev_queue,
				 struct Qdisc_ops *ops);
extern struct Qdisc *qdisc_create_dflt(struct net_device *dev,
				       struct netdev_queue *dev_queue,
				       struct Qdisc_ops *ops, u32 parentid);
extern void tcf_destroy(struct tcf_proto *tp);
extern void tcf_destroy_chain(struct tcf_proto **fl);

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_ACT
	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;
}

/* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
   long it will take to send a packet given its size.
 */
static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
{
	int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
	if (slot < 0)
		slot = 0;
	slot >>= rtab->rate.cell_log;
	if (slot > 255)
		return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]);
	return rtab->data[slot];
}

#ifdef CONFIG_NET_CLS_ACT
static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask)
{
	struct sk_buff *n = skb_clone(skb, gfp_mask);

	if (n) {
		n->tc_verd = SET_TC_VERD(n->tc_verd, 0);
		n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd);
		n->tc_verd = CLR_TC_MUNGED(n->tc_verd);
	}
	return n;
}
#endif

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef __NET_SCHED_GENERIC_H
	2	#define __NET_SCHED_GENERIC_H
	3
1da177e4 LT	4	#include <linux/netdevice.h>
	5	#include <linux/types.h>
	6	#include <linux/rcupdate.h>
	7	#include <linux/module.h>
1da177e4 LT	8	#include <linux/pkt_sched.h>
	9	#include <linux/pkt_cls.h>
	10	#include <net/gen_stats.h>
be577ddc	11	#include <net/rtnetlink.h>
1da177e4 LT	12
	13	struct Qdisc_ops;
	14	struct qdisc_walker;
	15	struct tcf_walker;
	16	struct module;
	17
	18	struct qdisc_rate_table
	19	{
	20	struct tc_ratespec rate;
	21	u32 data[256];
	22	struct qdisc_rate_table *next;
	23	int refcnt;
	24	};
	25
	26	struct Qdisc
	27	{
	28	int (enqueue)(struct sk_buff skb, struct Qdisc *dev);
	29	struct sk_buff * (dequeue)(struct Qdisc dev);
	30	unsigned flags;
	31	#define TCQ_F_BUILTIN 1
	32	#define TCQ_F_THROTTLED 2
	33	#define TCQ_F_INGRESS 4
	34	int padded;
	35	struct Qdisc_ops *ops;
	36	u32 handle;
	37	u32 parent;
	38	atomic_t refcnt;
	39	struct sk_buff_head q;
bb949fbd	40	struct netdev_queue *dev_queue;
1da177e4 LT	41	struct net_device *dev;
	42	struct list_head list;
	43
	44	struct gnet_stats_basic bstats;
	45	struct gnet_stats_queue qstats;
	46	struct gnet_stats_rate_est rate_est;
	47	spinlock_t *stats_lock;
	48	struct rcu_head q_rcu;
	49	int (reshape_fail)(struct sk_buff skb,
	50	struct Qdisc *q);
	51
	52	/* This field is deprecated, but it is still used by CBQ
	53	* and it will live until better solution will be invented.
	54	*/
	55	struct Qdisc *__parent;
	56	};
	57
	58	struct Qdisc_class_ops
	59	{
	60	/* Child qdisc manipulation */
	61	int (graft)(struct Qdisc , unsigned long cl,
	62	struct Qdisc , struct Qdisc *);
	63	struct Qdisc * (leaf)(struct Qdisc , unsigned long cl);
43effa1e	64	void (qlen_notify)(struct Qdisc , unsigned long);
1da177e4 LT	65
	66	/* Class manipulation routines */
	67	unsigned long (get)(struct Qdisc , u32 classid);
	68	void (put)(struct Qdisc , unsigned long);
	69	int (change)(struct Qdisc , u32, u32,
1e90474c	70	struct nlattr *, unsigned long );
1da177e4 LT	71	int (delete)(struct Qdisc , unsigned long);
	72	void (walk)(struct Qdisc , struct qdisc_walker * arg);
	73
	74	/* Filter manipulation */
	75	struct tcf_proto ** (tcf_chain)(struct Qdisc , unsigned long);
	76	unsigned long (bind_tcf)(struct Qdisc , unsigned long,
	77	u32 classid);
	78	void (unbind_tcf)(struct Qdisc , unsigned long);
	79
	80	/* rtnetlink specific */
	81	int (dump)(struct Qdisc , unsigned long,
	82	struct sk_buff skb, struct tcmsg);
	83	int (dump_stats)(struct Qdisc , unsigned long,
	84	struct gnet_dump *);
	85	};
	86
	87	struct Qdisc_ops
	88	{
	89	struct Qdisc_ops *next;
20fea08b	90	const struct Qdisc_class_ops *cl_ops;
1da177e4 LT	91	char id[IFNAMSIZ];
	92	int priv_size;
	93
	94	int (enqueue)(struct sk_buff , struct Qdisc *);
	95	struct sk_buff * (dequeue)(struct Qdisc );
	96	int (requeue)(struct sk_buff , struct Qdisc *);
	97	unsigned int (drop)(struct Qdisc );
	98
1e90474c	99	int (init)(struct Qdisc , struct nlattr *arg);
1da177e4 LT	100	void (reset)(struct Qdisc );
1da177e4 LT	101	void (destroy)(struct Qdisc );
1e90474c	102	int (change)(struct Qdisc , struct nlattr *arg);
1da177e4 LT	103
	104	int (dump)(struct Qdisc , struct sk_buff *);
	105	int (dump_stats)(struct Qdisc , struct gnet_dump *);
	106
	107	struct module *owner;
	108	};
	109
	110
	111	struct tcf_result
	112	{
	113	unsigned long class;
	114	u32 classid;
	115	};
	116
	117	struct tcf_proto_ops
	118	{
	119	struct tcf_proto_ops *next;
	120	char kind[IFNAMSIZ];
	121
	122	int (classify)(struct sk_buff, struct tcf_proto*,
	123	struct tcf_result *);
	124	int (init)(struct tcf_proto);
	125	void (destroy)(struct tcf_proto);
	126
	127	unsigned long (get)(struct tcf_proto, u32 handle);
	128	void (put)(struct tcf_proto, unsigned long);
	129	int (change)(struct tcf_proto, unsigned long,
add93b61	130	u32 handle, struct nlattr **,
1da177e4 LT	131	unsigned long *);
	132	int (delete)(struct tcf_proto, unsigned long);
	133	void (walk)(struct tcf_proto, struct tcf_walker *arg);
	134
	135	/* rtnetlink specific */
	136	int (dump)(struct tcf_proto, unsigned long,
	137	struct sk_buff skb, struct tcmsg);
	138
	139	struct module *owner;
	140	};
	141
	142	struct tcf_proto
	143	{
	144	/* Fast access part */
	145	struct tcf_proto *next;
	146	void *root;
	147	int (classify)(struct sk_buff, struct tcf_proto*,
	148	struct tcf_result *);
66c6f529	149	__be16 protocol;
1da177e4 LT	150
	151	/* All the rest */
	152	u32 prio;
	153	u32 classid;
	154	struct Qdisc *q;
	155	void *data;
	156	struct tcf_proto_ops *ops;
	157	};
	158
	159
	160	extern void qdisc_lock_tree(struct net_device *dev);
	161	extern void qdisc_unlock_tree(struct net_device *dev);
	162
	163	#define sch_tree_lock(q) qdisc_lock_tree((q)->dev)
	164	#define sch_tree_unlock(q) qdisc_unlock_tree((q)->dev)
	165	#define tcf_tree_lock(tp) qdisc_lock_tree((tp)->q->dev)
	166	#define tcf_tree_unlock(tp) qdisc_unlock_tree((tp)->q->dev)
	167
e41a33e6 TG	168	extern struct Qdisc noop_qdisc;
	169	extern struct Qdisc_ops noop_qdisc_ops;
	170
6fe1c7a5 PM	171	struct Qdisc_class_common
	172	{
	173	u32 classid;
	174	struct hlist_node hnode;
	175	};
	176
	177	struct Qdisc_class_hash
	178	{
	179	struct hlist_head *hash;
	180	unsigned int hashsize;
	181	unsigned int hashmask;
	182	unsigned int hashelems;
	183	};
	184
	185	static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
	186	{
	187	id ^= id >> 8;
	188	id ^= id >> 4;
	189	return id & mask;
	190	}
	191
	192	static inline struct Qdisc_class_common *
	193	qdisc_class_find(struct Qdisc_class_hash *hash, u32 id)
	194	{
	195	struct Qdisc_class_common *cl;
	196	struct hlist_node *n;
	197	unsigned int h;
	198
	199	h = qdisc_class_hash(id, hash->hashmask);
	200	hlist_for_each_entry(cl, n, &hash->hash[h], hnode) {
	201	if (cl->classid == id)
	202	return cl;
	203	}
	204	return NULL;
	205	}
	206
	207	extern int qdisc_class_hash_init(struct Qdisc_class_hash *);
	208	extern void qdisc_class_hash_insert(struct Qdisc_class_hash , struct Qdisc_class_common );
	209	extern void qdisc_class_hash_remove(struct Qdisc_class_hash , struct Qdisc_class_common );
	210	extern void qdisc_class_hash_grow(struct Qdisc , struct Qdisc_class_hash );
	211	extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
	212
e41a33e6 TG	213	extern void dev_init_scheduler(struct net_device *dev);
	214	extern void dev_shutdown(struct net_device *dev);
	215	extern void dev_activate(struct net_device *dev);
	216	extern void dev_deactivate(struct net_device *dev);
	217	extern void qdisc_reset(struct Qdisc *qdisc);
	218	extern void qdisc_destroy(struct Qdisc *qdisc);
43effa1e	219	extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n);
bb949fbd DM	220	extern struct Qdisc qdisc_alloc(struct net_device dev,
	221	struct netdev_queue *dev_queue,
	222	struct Qdisc_ops *ops);
e41a33e6	223	extern struct Qdisc qdisc_create_dflt(struct net_device dev,
bb949fbd	224	struct netdev_queue *dev_queue,
9f9afec4	225	struct Qdisc_ops *ops, u32 parentid);
a48b5a61	226	extern void tcf_destroy(struct tcf_proto *tp);
ff31ab56	227	extern void tcf_destroy_chain(struct tcf_proto **fl);
1da177e4	228
9972b25d TG	229	static inline int __qdisc_enqueue_tail(struct sk_buff skb, struct Qdisc sch,
	230	struct sk_buff_head *list)
	231	{
	232	__skb_queue_tail(list, skb);
	233	sch->qstats.backlog += skb->len;
	234	sch->bstats.bytes += skb->len;
	235	sch->bstats.packets++;
	236
	237	return NET_XMIT_SUCCESS;
	238	}
	239
	240	static inline int qdisc_enqueue_tail(struct sk_buff skb, struct Qdisc sch)
	241	{
	242	return __qdisc_enqueue_tail(skb, sch, &sch->q);
	243	}
	244
	245	static inline struct sk_buff __qdisc_dequeue_head(struct Qdisc sch,
	246	struct sk_buff_head *list)
	247	{
	248	struct sk_buff *skb = __skb_dequeue(list);
	249
	250	if (likely(skb != NULL))
	251	sch->qstats.backlog -= skb->len;
	252
	253	return skb;
	254	}
	255
	256	static inline struct sk_buff qdisc_dequeue_head(struct Qdisc sch)
	257	{
	258	return __qdisc_dequeue_head(sch, &sch->q);
	259	}
	260
	261	static inline struct sk_buff __qdisc_dequeue_tail(struct Qdisc sch,
	262	struct sk_buff_head *list)
	263	{
	264	struct sk_buff *skb = __skb_dequeue_tail(list);
	265
	266	if (likely(skb != NULL))
	267	sch->qstats.backlog -= skb->len;
	268
	269	return skb;
	270	}
	271
	272	static inline struct sk_buff qdisc_dequeue_tail(struct Qdisc sch)
	273	{
	274	return __qdisc_dequeue_tail(sch, &sch->q);
	275	}
	276
	277	static inline int __qdisc_requeue(struct sk_buff skb, struct Qdisc sch,
	278	struct sk_buff_head *list)
	279	{
	280	__skb_queue_head(list, skb);
	281	sch->qstats.backlog += skb->len;
	282	sch->qstats.requeues++;
	283
	284	return NET_XMIT_SUCCESS;
	285	}
	286
	287	static inline int qdisc_requeue(struct sk_buff skb, struct Qdisc sch)
	288	{
	289	return __qdisc_requeue(skb, sch, &sch->q);
	290	}
	291
	292	static inline void __qdisc_reset_queue(struct Qdisc *sch,
293	struct sk_buff_head *list)
294	{
295	/*
296	* We do not know the backlog in bytes of this list, it
297	* is up to the caller to correct it
298	*/
299	skb_queue_purge(list);
300	}
301
302	static inline void qdisc_reset_queue(struct Qdisc *sch)
303	{
304	__qdisc_reset_queue(sch, &sch->q);
305	sch->qstats.backlog = 0;
306	}
307
308	static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
309	struct sk_buff_head *list)
310	{
311	struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
312
313	if (likely(skb != NULL)) {
314	unsigned int len = skb->len;
315	kfree_skb(skb);
316	return len;
317	}
318
319	return 0;
320	}
321
322	static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
323	{
324	return __qdisc_queue_drop(sch, &sch->q);
325	}
326
327	static inline int qdisc_drop(struct sk_buff skb, struct Qdisc sch)
328	{
329	kfree_skb(skb);
330	sch->qstats.drops++;
331
332	return NET_XMIT_DROP;
333	}
334
335	static inline int qdisc_reshape_fail(struct sk_buff skb, struct Qdisc sch)
336	{
337	sch->qstats.drops++;
338
c3bc7cff	339	#ifdef CONFIG_NET_CLS_ACT
9972b25d TG	340	if (sch->reshape_fail == NULL \|\| sch->reshape_fail(skb, sch))
	341	goto drop;
	342
	343	return NET_XMIT_SUCCESS;
	344
	345	drop:
	346	#endif
	347	kfree_skb(skb);
	348	return NET_XMIT_DROP;
	349	}
	350
e9bef55d JDB	351	/* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
	352	long it will take to send a packet given its size.
	353	*/
	354	static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
	355	{
e08b0998 JDB	356	int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
	357	if (slot < 0)
	358	slot = 0;
e9bef55d JDB	359	slot >>= rtab->rate.cell_log;
	360	if (slot > 255)
	361	return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]);
	362	return rtab->data[slot];
	363	}
	364
12da81d1 JHS	365	#ifdef CONFIG_NET_CLS_ACT
	366	static inline struct sk_buff skb_act_clone(struct sk_buff skb, gfp_t gfp_mask)
	367	{
	368	struct sk_buff *n = skb_clone(skb, gfp_mask);
	369
	370	if (n) {
	371	n->tc_verd = SET_TC_VERD(n->tc_verd, 0);
	372	n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd);
	373	n->tc_verd = CLR_TC_MUNGED(n->tc_verd);
12da81d1 JHS	374	}
	375	return n;
	376	}
	377	#endif
	378
1da177e4	379	#endif