[deliverable/linux.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;
};

enum qdisc_state_t
{
	__QDISC_STATE_RUNNING,
};

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;
	unsigned long		state;
	struct sk_buff		*gso_skb;
	struct sk_buff_head	q;
	struct netdev_queue	*dev_queue;
	struct list_head	list;

	struct gnet_stats_basic	bstats;
	struct gnet_stats_queue	qstats;
	struct gnet_stats_rate_est	rate_est;
	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;
};

static inline struct Qdisc *qdisc_root(struct Qdisc *qdisc)
{
	return qdisc->dev_queue->qdisc;
}

static inline spinlock_t *qdisc_root_lock(struct Qdisc *qdisc)
{
	struct Qdisc *root = qdisc_root(qdisc);

	return &root->dev_queue->lock;
}

static inline struct net_device *qdisc_dev(struct Qdisc *qdisc)
{
	return qdisc->dev_queue->dev;
}

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(qdisc_dev(q))
#define sch_tree_unlock(q)	qdisc_unlock_tree(qdisc_dev(q))
#define tcf_tree_lock(tp)	qdisc_lock_tree(qdisc_dev((tp)->q))
#define tcf_tree_unlock(tp)	qdisc_unlock_tree(qdisc_dev((tp)->q))

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 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);

/* Reset all TX qdiscs of a device.  */
static inline void qdisc_reset_all_tx(struct net_device *dev)
{
	unsigned int i;
	for (i = 0; i < dev->num_tx_queues; i++)
		qdisc_reset(netdev_get_tx_queue(dev, i)->qdisc);
}

/* Are all TX queues of the device empty?  */
static inline bool qdisc_all_tx_empty(const struct net_device *dev)
{
	unsigned int i;
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
		const struct Qdisc *q = txq->qdisc;

		if (q->q.qlen)
			return false;
	}
	return true;
}

/* Are any of the TX qdiscs changing?  */
static inline bool qdisc_tx_changing(struct net_device *dev)
{
	unsigned int i;
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
		if (txq->qdisc != txq->qdisc_sleeping)
			return true;
	}
	return false;
}

/* Is the device using the noop qdisc on all queues?  */
static inline bool qdisc_tx_is_noop(const struct net_device *dev)
{
	unsigned int i;
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
		if (txq->qdisc != &noop_qdisc)
			return false;
	}
	return true;
}

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
e2627c8c DM	26	enum qdisc_state_t
	27	{
	28	__QDISC_STATE_RUNNING,
	29	};
	30
1da177e4 LT	31	struct Qdisc
	32	{
	33	int (enqueue)(struct sk_buff skb, struct Qdisc *dev);
	34	struct sk_buff * (dequeue)(struct Qdisc dev);
	35	unsigned flags;
	36	#define TCQ_F_BUILTIN 1
	37	#define TCQ_F_THROTTLED 2
	38	#define TCQ_F_INGRESS 4
	39	int padded;
	40	struct Qdisc_ops *ops;
	41	u32 handle;
	42	u32 parent;
	43	atomic_t refcnt;
e2627c8c	44	unsigned long state;
d3b753db	45	struct sk_buff *gso_skb;
1da177e4	46	struct sk_buff_head q;
bb949fbd	47	struct netdev_queue *dev_queue;
1da177e4 LT	48	struct list_head list;
	49
	50	struct gnet_stats_basic bstats;
	51	struct gnet_stats_queue qstats;
	52	struct gnet_stats_rate_est rate_est;
1da177e4 LT	53	struct rcu_head q_rcu;
	54	int (reshape_fail)(struct sk_buff skb,
	55	struct Qdisc *q);
	56
	57	/* This field is deprecated, but it is still used by CBQ
	58	* and it will live until better solution will be invented.
	59	*/
	60	struct Qdisc *__parent;
	61	};
	62
	63	struct Qdisc_class_ops
	64	{
	65	/* Child qdisc manipulation */
	66	int (graft)(struct Qdisc , unsigned long cl,
	67	struct Qdisc , struct Qdisc *);
	68	struct Qdisc * (leaf)(struct Qdisc , unsigned long cl);
43effa1e	69	void (qlen_notify)(struct Qdisc , unsigned long);
1da177e4 LT	70
	71	/* Class manipulation routines */
	72	unsigned long (get)(struct Qdisc , u32 classid);
	73	void (put)(struct Qdisc , unsigned long);
	74	int (change)(struct Qdisc , u32, u32,
1e90474c	75	struct nlattr *, unsigned long );
1da177e4 LT	76	int (delete)(struct Qdisc , unsigned long);
	77	void (walk)(struct Qdisc , struct qdisc_walker * arg);
	78
	79	/* Filter manipulation */
	80	struct tcf_proto ** (tcf_chain)(struct Qdisc , unsigned long);
	81	unsigned long (bind_tcf)(struct Qdisc , unsigned long,
	82	u32 classid);
	83	void (unbind_tcf)(struct Qdisc , unsigned long);
	84
	85	/* rtnetlink specific */
	86	int (dump)(struct Qdisc , unsigned long,
	87	struct sk_buff skb, struct tcmsg);
	88	int (dump_stats)(struct Qdisc , unsigned long,
	89	struct gnet_dump *);
	90	};
	91
	92	struct Qdisc_ops
	93	{
	94	struct Qdisc_ops *next;
20fea08b	95	const struct Qdisc_class_ops *cl_ops;
1da177e4 LT	96	char id[IFNAMSIZ];
	97	int priv_size;
	98
	99	int (enqueue)(struct sk_buff , struct Qdisc *);
	100	struct sk_buff * (dequeue)(struct Qdisc );
	101	int (requeue)(struct sk_buff , struct Qdisc *);
	102	unsigned int (drop)(struct Qdisc );
	103
1e90474c	104	int (init)(struct Qdisc , struct nlattr *arg);
1da177e4 LT	105	void (reset)(struct Qdisc );
1da177e4 LT	106	void (destroy)(struct Qdisc );
1e90474c	107	int (change)(struct Qdisc , struct nlattr *arg);
1da177e4 LT	108
	109	int (dump)(struct Qdisc , struct sk_buff *);
	110	int (dump_stats)(struct Qdisc , struct gnet_dump *);
	111
	112	struct module *owner;
	113	};
	114
	115
	116	struct tcf_result
	117	{
	118	unsigned long class;
	119	u32 classid;
	120	};
	121
	122	struct tcf_proto_ops
	123	{
	124	struct tcf_proto_ops *next;
	125	char kind[IFNAMSIZ];
	126
	127	int (classify)(struct sk_buff, struct tcf_proto*,
	128	struct tcf_result *);
	129	int (init)(struct tcf_proto);
	130	void (destroy)(struct tcf_proto);
	131
	132	unsigned long (get)(struct tcf_proto, u32 handle);
	133	void (put)(struct tcf_proto, unsigned long);
	134	int (change)(struct tcf_proto, unsigned long,
add93b61	135	u32 handle, struct nlattr **,
1da177e4 LT	136	unsigned long *);
	137	int (delete)(struct tcf_proto, unsigned long);
	138	void (walk)(struct tcf_proto, struct tcf_walker *arg);
	139
	140	/* rtnetlink specific */
	141	int (dump)(struct tcf_proto, unsigned long,
	142	struct sk_buff skb, struct tcmsg);
	143
	144	struct module *owner;
	145	};
	146
	147	struct tcf_proto
	148	{
	149	/* Fast access part */
	150	struct tcf_proto *next;
	151	void *root;
	152	int (classify)(struct sk_buff, struct tcf_proto*,
	153	struct tcf_result *);
66c6f529	154	__be16 protocol;
1da177e4 LT	155
	156	/* All the rest */
	157	u32 prio;
	158	u32 classid;
	159	struct Qdisc *q;
	160	void *data;
	161	struct tcf_proto_ops *ops;
	162	};
	163
7698b4fc DM	164	static inline struct Qdisc qdisc_root(struct Qdisc qdisc)
	165	{
	166	return qdisc->dev_queue->qdisc;
	167	}
	168
	169	static inline spinlock_t qdisc_root_lock(struct Qdisc qdisc)
	170	{
	171	struct Qdisc *root = qdisc_root(qdisc);
	172
	173	return &root->dev_queue->lock;
	174	}
	175
5ce2d488 DM	176	static inline struct net_device qdisc_dev(struct Qdisc qdisc)
	177	{
	178	return qdisc->dev_queue->dev;
	179	}
1da177e4 LT	180
	181	extern void qdisc_lock_tree(struct net_device *dev);
	182	extern void qdisc_unlock_tree(struct net_device *dev);
	183
5ce2d488 DM	184	#define sch_tree_lock(q) qdisc_lock_tree(qdisc_dev(q))
	185	#define sch_tree_unlock(q) qdisc_unlock_tree(qdisc_dev(q))
	186	#define tcf_tree_lock(tp) qdisc_lock_tree(qdisc_dev((tp)->q))
	187	#define tcf_tree_unlock(tp) qdisc_unlock_tree(qdisc_dev((tp)->q))
1da177e4	188
e41a33e6 TG	189	extern struct Qdisc noop_qdisc;
	190	extern struct Qdisc_ops noop_qdisc_ops;
	191
6fe1c7a5 PM	192	struct Qdisc_class_common
	193	{
	194	u32 classid;
	195	struct hlist_node hnode;
	196	};
	197
	198	struct Qdisc_class_hash
	199	{
	200	struct hlist_head *hash;
	201	unsigned int hashsize;
	202	unsigned int hashmask;
	203	unsigned int hashelems;
	204	};
	205
	206	static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
	207	{
	208	id ^= id >> 8;
	209	id ^= id >> 4;
	210	return id & mask;
	211	}
	212
	213	static inline struct Qdisc_class_common *
	214	qdisc_class_find(struct Qdisc_class_hash *hash, u32 id)
	215	{
	216	struct Qdisc_class_common *cl;
	217	struct hlist_node *n;
	218	unsigned int h;
	219
	220	h = qdisc_class_hash(id, hash->hashmask);
	221	hlist_for_each_entry(cl, n, &hash->hash[h], hnode) {
	222	if (cl->classid == id)
	223	return cl;
	224	}
	225	return NULL;
	226	}
	227
	228	extern int qdisc_class_hash_init(struct Qdisc_class_hash *);
	229	extern void qdisc_class_hash_insert(struct Qdisc_class_hash , struct Qdisc_class_common );
	230	extern void qdisc_class_hash_remove(struct Qdisc_class_hash , struct Qdisc_class_common );
	231	extern void qdisc_class_hash_grow(struct Qdisc , struct Qdisc_class_hash );
	232	extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
	233
e41a33e6 TG	234	extern void dev_init_scheduler(struct net_device *dev);
	235	extern void dev_shutdown(struct net_device *dev);
	236	extern void dev_activate(struct net_device *dev);
	237	extern void dev_deactivate(struct net_device *dev);
	238	extern void qdisc_reset(struct Qdisc *qdisc);
	239	extern void qdisc_destroy(struct Qdisc *qdisc);
43effa1e	240	extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n);
5ce2d488	241	extern struct Qdisc qdisc_alloc(struct netdev_queue dev_queue,
bb949fbd	242	struct Qdisc_ops *ops);
e41a33e6	243	extern struct Qdisc qdisc_create_dflt(struct net_device dev,
bb949fbd	244	struct netdev_queue *dev_queue,
9f9afec4	245	struct Qdisc_ops *ops, u32 parentid);
a48b5a61	246	extern void tcf_destroy(struct tcf_proto *tp);
ff31ab56	247	extern void tcf_destroy_chain(struct tcf_proto **fl);
1da177e4	248
5aa70995 DM	249	/* Reset all TX qdiscs of a device. */
	250	static inline void qdisc_reset_all_tx(struct net_device *dev)
	251	{
e8a0464c DM	252	unsigned int i;
	253	for (i = 0; i < dev->num_tx_queues; i++)
	254	qdisc_reset(netdev_get_tx_queue(dev, i)->qdisc);
5aa70995 DM	255	}
5aa70995 DM	256
3e745dd6 DM	257	/* Are all TX queues of the device empty? */
	258	static inline bool qdisc_all_tx_empty(const struct net_device *dev)
	259	{
e8a0464c DM	260	unsigned int i;
	261	for (i = 0; i < dev->num_tx_queues; i++) {
	262	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	263	const struct Qdisc *q = txq->qdisc;
3e745dd6	264
e8a0464c DM	265	if (q->q.qlen)
	266	return false;
	267	}
	268	return true;
3e745dd6 DM	269	}
3e745dd6 DM	270
6fa9864b DM	271	/* Are any of the TX qdiscs changing? */
	272	static inline bool qdisc_tx_changing(struct net_device *dev)
	273	{
e8a0464c DM	274	unsigned int i;
	275	for (i = 0; i < dev->num_tx_queues; i++) {
	276	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	277	if (txq->qdisc != txq->qdisc_sleeping)
	278	return true;
	279	}
	280	return false;
6fa9864b DM	281	}
6fa9864b DM	282
e8a0464c	283	/* Is the device using the noop qdisc on all queues? */
05297949 DM	284	static inline bool qdisc_tx_is_noop(const struct net_device *dev)
05297949 DM	285	{
e8a0464c DM	286	unsigned int i;
	287	for (i = 0; i < dev->num_tx_queues; i++) {
	288	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	289	if (txq->qdisc != &noop_qdisc)
	290	return false;
	291	}
	292	return true;
05297949 DM	293	}
05297949 DM	294
9972b25d TG	295	static inline int __qdisc_enqueue_tail(struct sk_buff skb, struct Qdisc sch,
	296	struct sk_buff_head *list)
	297	{
	298	__skb_queue_tail(list, skb);
	299	sch->qstats.backlog += skb->len;
	300	sch->bstats.bytes += skb->len;
	301	sch->bstats.packets++;
	302
	303	return NET_XMIT_SUCCESS;
	304	}
	305
	306	static inline int qdisc_enqueue_tail(struct sk_buff skb, struct Qdisc sch)
	307	{
	308	return __qdisc_enqueue_tail(skb, sch, &sch->q);
	309	}
	310
	311	static inline struct sk_buff __qdisc_dequeue_head(struct Qdisc sch,
	312	struct sk_buff_head *list)
	313	{
	314	struct sk_buff *skb = __skb_dequeue(list);
	315
	316	if (likely(skb != NULL))
	317	sch->qstats.backlog -= skb->len;
	318
	319	return skb;
	320	}
	321
	322	static inline struct sk_buff qdisc_dequeue_head(struct Qdisc sch)
	323	{
	324	return __qdisc_dequeue_head(sch, &sch->q);
	325	}
	326
	327	static inline struct sk_buff __qdisc_dequeue_tail(struct Qdisc sch,
	328	struct sk_buff_head *list)
	329	{
	330	struct sk_buff *skb = __skb_dequeue_tail(list);
	331
	332	if (likely(skb != NULL))
	333	sch->qstats.backlog -= skb->len;
	334
	335	return skb;
	336	}
	337
	338	static inline struct sk_buff qdisc_dequeue_tail(struct Qdisc sch)
	339	{
	340	return __qdisc_dequeue_tail(sch, &sch->q);
	341	}
	342
	343	static inline int __qdisc_requeue(struct sk_buff skb, struct Qdisc sch,
	344	struct sk_buff_head *list)
	345	{
	346	__skb_queue_head(list, skb);
	347	sch->qstats.backlog += skb->len;
	348	sch->qstats.requeues++;
	349
	350	return NET_XMIT_SUCCESS;
	351	}
	352
	353	static inline int qdisc_requeue(struct sk_buff skb, struct Qdisc sch)
	354	{
	355	return __qdisc_requeue(skb, sch, &sch->q);
	356	}
	357
	358	static inline void __qdisc_reset_queue(struct Qdisc *sch,
359	struct sk_buff_head *list)
360	{
361	/*
362	* We do not know the backlog in bytes of this list, it
363	* is up to the caller to correct it
364	*/
365	skb_queue_purge(list);
366	}
367
368	static inline void qdisc_reset_queue(struct Qdisc *sch)
369	{
370	__qdisc_reset_queue(sch, &sch->q);
371	sch->qstats.backlog = 0;
372	}
373
374	static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
375	struct sk_buff_head *list)
376	{
377	struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
378
379	if (likely(skb != NULL)) {
380	unsigned int len = skb->len;
381	kfree_skb(skb);
382	return len;
383	}
384
385	return 0;
386	}
387
388	static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
389	{
390	return __qdisc_queue_drop(sch, &sch->q);
391	}
392
393	static inline int qdisc_drop(struct sk_buff skb, struct Qdisc sch)
394	{
395	kfree_skb(skb);
396	sch->qstats.drops++;
397
398	return NET_XMIT_DROP;
399	}
400
401	static inline int qdisc_reshape_fail(struct sk_buff skb, struct Qdisc sch)
402	{
403	sch->qstats.drops++;
404
c3bc7cff	405	#ifdef CONFIG_NET_CLS_ACT
9972b25d TG	406	if (sch->reshape_fail == NULL \|\| sch->reshape_fail(skb, sch))
	407	goto drop;
	408
	409	return NET_XMIT_SUCCESS;
	410
	411	drop:
	412	#endif
	413	kfree_skb(skb);
	414	return NET_XMIT_DROP;
	415	}
	416
e9bef55d JDB	417	/* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
	418	long it will take to send a packet given its size.
	419	*/
	420	static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
	421	{
e08b0998 JDB	422	int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
	423	if (slot < 0)
	424	slot = 0;
e9bef55d JDB	425	slot >>= rtab->rate.cell_log;
	426	if (slot > 255)
	427	return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]);
	428	return rtab->data[slot];
	429	}
	430
12da81d1 JHS	431	#ifdef CONFIG_NET_CLS_ACT
	432	static inline struct sk_buff skb_act_clone(struct sk_buff skb, gfp_t gfp_mask)
	433	{
	434	struct sk_buff *n = skb_clone(skb, gfp_mask);
	435
	436	if (n) {
	437	n->tc_verd = SET_TC_VERD(n->tc_verd, 0);
	438	n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd);
	439	n->tc_verd = CLR_TC_MUNGED(n->tc_verd);
12da81d1 JHS	440	}
	441	return n;
	442	}
	443	#endif
	444
1da177e4	445	#endif