[mirror_ubuntu-jammy-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;
};

enum qdisc_state_t
{
	__QDISC_STATE_RUNNING,
	__QDISC_STATE_SCHED,
};

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 Qdisc		*next_sched;
	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,
37437bb2	29	__QDISC_STATE_SCHED,
e2627c8c DM	30	};
e2627c8c DM	31
1da177e4 LT	32	struct Qdisc
	33	{
	34	int (enqueue)(struct sk_buff skb, struct Qdisc *dev);
	35	struct sk_buff * (dequeue)(struct Qdisc dev);
	36	unsigned flags;
	37	#define TCQ_F_BUILTIN 1
	38	#define TCQ_F_THROTTLED 2
	39	#define TCQ_F_INGRESS 4
	40	int padded;
	41	struct Qdisc_ops *ops;
	42	u32 handle;
	43	u32 parent;
	44	atomic_t refcnt;
e2627c8c	45	unsigned long state;
d3b753db	46	struct sk_buff *gso_skb;
1da177e4	47	struct sk_buff_head q;
bb949fbd	48	struct netdev_queue *dev_queue;
37437bb2	49	struct Qdisc *next_sched;
1da177e4 LT	50	struct list_head list;
	51
	52	struct gnet_stats_basic bstats;
	53	struct gnet_stats_queue qstats;
	54	struct gnet_stats_rate_est rate_est;
1da177e4 LT	55	struct rcu_head q_rcu;
	56	int (reshape_fail)(struct sk_buff skb,
	57	struct Qdisc *q);
	58
	59	/* This field is deprecated, but it is still used by CBQ
	60	* and it will live until better solution will be invented.
	61	*/
	62	struct Qdisc *__parent;
	63	};
	64
	65	struct Qdisc_class_ops
	66	{
	67	/* Child qdisc manipulation */
	68	int (graft)(struct Qdisc , unsigned long cl,
	69	struct Qdisc , struct Qdisc *);
	70	struct Qdisc * (leaf)(struct Qdisc , unsigned long cl);
43effa1e	71	void (qlen_notify)(struct Qdisc , unsigned long);
1da177e4 LT	72
	73	/* Class manipulation routines */
	74	unsigned long (get)(struct Qdisc , u32 classid);
	75	void (put)(struct Qdisc , unsigned long);
	76	int (change)(struct Qdisc , u32, u32,
1e90474c	77	struct nlattr *, unsigned long );
1da177e4 LT	78	int (delete)(struct Qdisc , unsigned long);
	79	void (walk)(struct Qdisc , struct qdisc_walker * arg);
	80
	81	/* Filter manipulation */
	82	struct tcf_proto ** (tcf_chain)(struct Qdisc , unsigned long);
	83	unsigned long (bind_tcf)(struct Qdisc , unsigned long,
	84	u32 classid);
	85	void (unbind_tcf)(struct Qdisc , unsigned long);
	86
	87	/* rtnetlink specific */
	88	int (dump)(struct Qdisc , unsigned long,
	89	struct sk_buff skb, struct tcmsg);
	90	int (dump_stats)(struct Qdisc , unsigned long,
	91	struct gnet_dump *);
	92	};
	93
	94	struct Qdisc_ops
	95	{
	96	struct Qdisc_ops *next;
20fea08b	97	const struct Qdisc_class_ops *cl_ops;
1da177e4 LT	98	char id[IFNAMSIZ];
	99	int priv_size;
	100
	101	int (enqueue)(struct sk_buff , struct Qdisc *);
	102	struct sk_buff * (dequeue)(struct Qdisc );
	103	int (requeue)(struct sk_buff , struct Qdisc *);
	104	unsigned int (drop)(struct Qdisc );
	105
1e90474c	106	int (init)(struct Qdisc , struct nlattr *arg);
1da177e4 LT	107	void (reset)(struct Qdisc );
1da177e4 LT	108	void (destroy)(struct Qdisc );
1e90474c	109	int (change)(struct Qdisc , struct nlattr *arg);
1da177e4 LT	110
	111	int (dump)(struct Qdisc , struct sk_buff *);
	112	int (dump_stats)(struct Qdisc , struct gnet_dump *);
	113
	114	struct module *owner;
	115	};
	116
	117
	118	struct tcf_result
	119	{
	120	unsigned long class;
	121	u32 classid;
	122	};
	123
	124	struct tcf_proto_ops
	125	{
	126	struct tcf_proto_ops *next;
	127	char kind[IFNAMSIZ];
	128
	129	int (classify)(struct sk_buff, struct tcf_proto*,
	130	struct tcf_result *);
	131	int (init)(struct tcf_proto);
	132	void (destroy)(struct tcf_proto);
	133
	134	unsigned long (get)(struct tcf_proto, u32 handle);
	135	void (put)(struct tcf_proto, unsigned long);
	136	int (change)(struct tcf_proto, unsigned long,
add93b61	137	u32 handle, struct nlattr **,
1da177e4 LT	138	unsigned long *);
	139	int (delete)(struct tcf_proto, unsigned long);
	140	void (walk)(struct tcf_proto, struct tcf_walker *arg);
	141
	142	/* rtnetlink specific */
	143	int (dump)(struct tcf_proto, unsigned long,
	144	struct sk_buff skb, struct tcmsg);
	145
	146	struct module *owner;
	147	};
	148
	149	struct tcf_proto
	150	{
	151	/* Fast access part */
	152	struct tcf_proto *next;
	153	void *root;
	154	int (classify)(struct sk_buff, struct tcf_proto*,
	155	struct tcf_result *);
66c6f529	156	__be16 protocol;
1da177e4 LT	157
	158	/* All the rest */
	159	u32 prio;
	160	u32 classid;
	161	struct Qdisc *q;
	162	void *data;
	163	struct tcf_proto_ops *ops;
	164	};
	165
7698b4fc DM	166	static inline struct Qdisc qdisc_root(struct Qdisc qdisc)
	167	{
	168	return qdisc->dev_queue->qdisc;
	169	}
	170
	171	static inline spinlock_t qdisc_root_lock(struct Qdisc qdisc)
	172	{
	173	struct Qdisc *root = qdisc_root(qdisc);
	174
	175	return &root->dev_queue->lock;
	176	}
	177
5ce2d488 DM	178	static inline struct net_device qdisc_dev(struct Qdisc qdisc)
	179	{
	180	return qdisc->dev_queue->dev;
	181	}
1da177e4 LT	182
	183	extern void qdisc_lock_tree(struct net_device *dev);
	184	extern void qdisc_unlock_tree(struct net_device *dev);
	185
5ce2d488 DM	186	#define sch_tree_lock(q) qdisc_lock_tree(qdisc_dev(q))
	187	#define sch_tree_unlock(q) qdisc_unlock_tree(qdisc_dev(q))
	188	#define tcf_tree_lock(tp) qdisc_lock_tree(qdisc_dev((tp)->q))
	189	#define tcf_tree_unlock(tp) qdisc_unlock_tree(qdisc_dev((tp)->q))
1da177e4	190
e41a33e6 TG	191	extern struct Qdisc noop_qdisc;
	192	extern struct Qdisc_ops noop_qdisc_ops;
	193
6fe1c7a5 PM	194	struct Qdisc_class_common
	195	{
	196	u32 classid;
	197	struct hlist_node hnode;
	198	};
	199
	200	struct Qdisc_class_hash
	201	{
	202	struct hlist_head *hash;
	203	unsigned int hashsize;
	204	unsigned int hashmask;
	205	unsigned int hashelems;
	206	};
	207
	208	static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
	209	{
	210	id ^= id >> 8;
	211	id ^= id >> 4;
	212	return id & mask;
	213	}
	214
	215	static inline struct Qdisc_class_common *
	216	qdisc_class_find(struct Qdisc_class_hash *hash, u32 id)
	217	{
	218	struct Qdisc_class_common *cl;
	219	struct hlist_node *n;
	220	unsigned int h;
	221
	222	h = qdisc_class_hash(id, hash->hashmask);
	223	hlist_for_each_entry(cl, n, &hash->hash[h], hnode) {
	224	if (cl->classid == id)
	225	return cl;
	226	}
	227	return NULL;
	228	}
	229
	230	extern int qdisc_class_hash_init(struct Qdisc_class_hash *);
	231	extern void qdisc_class_hash_insert(struct Qdisc_class_hash , struct Qdisc_class_common );
	232	extern void qdisc_class_hash_remove(struct Qdisc_class_hash , struct Qdisc_class_common );
	233	extern void qdisc_class_hash_grow(struct Qdisc , struct Qdisc_class_hash );
	234	extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
	235
e41a33e6 TG	236	extern void dev_init_scheduler(struct net_device *dev);
	237	extern void dev_shutdown(struct net_device *dev);
	238	extern void dev_activate(struct net_device *dev);
	239	extern void dev_deactivate(struct net_device *dev);
	240	extern void qdisc_reset(struct Qdisc *qdisc);
	241	extern void qdisc_destroy(struct Qdisc *qdisc);
43effa1e	242	extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n);
5ce2d488	243	extern struct Qdisc qdisc_alloc(struct netdev_queue dev_queue,
bb949fbd	244	struct Qdisc_ops *ops);
e41a33e6	245	extern struct Qdisc qdisc_create_dflt(struct net_device dev,
bb949fbd	246	struct netdev_queue *dev_queue,
9f9afec4	247	struct Qdisc_ops *ops, u32 parentid);
a48b5a61	248	extern void tcf_destroy(struct tcf_proto *tp);
ff31ab56	249	extern void tcf_destroy_chain(struct tcf_proto **fl);
1da177e4	250
5aa70995 DM	251	/* Reset all TX qdiscs of a device. */
	252	static inline void qdisc_reset_all_tx(struct net_device *dev)
	253	{
e8a0464c DM	254	unsigned int i;
	255	for (i = 0; i < dev->num_tx_queues; i++)
	256	qdisc_reset(netdev_get_tx_queue(dev, i)->qdisc);
5aa70995 DM	257	}
5aa70995 DM	258
3e745dd6 DM	259	/* Are all TX queues of the device empty? */
	260	static inline bool qdisc_all_tx_empty(const struct net_device *dev)
	261	{
e8a0464c DM	262	unsigned int i;
	263	for (i = 0; i < dev->num_tx_queues; i++) {
	264	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	265	const struct Qdisc *q = txq->qdisc;
3e745dd6	266
e8a0464c DM	267	if (q->q.qlen)
	268	return false;
	269	}
	270	return true;
3e745dd6 DM	271	}
3e745dd6 DM	272
6fa9864b DM	273	/* Are any of the TX qdiscs changing? */
	274	static inline bool qdisc_tx_changing(struct net_device *dev)
	275	{
e8a0464c DM	276	unsigned int i;
	277	for (i = 0; i < dev->num_tx_queues; i++) {
	278	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	279	if (txq->qdisc != txq->qdisc_sleeping)
	280	return true;
	281	}
	282	return false;
6fa9864b DM	283	}
6fa9864b DM	284
e8a0464c	285	/* Is the device using the noop qdisc on all queues? */
05297949 DM	286	static inline bool qdisc_tx_is_noop(const struct net_device *dev)
05297949 DM	287	{
e8a0464c DM	288	unsigned int i;
	289	for (i = 0; i < dev->num_tx_queues; i++) {
	290	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	291	if (txq->qdisc != &noop_qdisc)
	292	return false;
	293	}
	294	return true;
05297949 DM	295	}
05297949 DM	296
9972b25d TG	297	static inline int __qdisc_enqueue_tail(struct sk_buff skb, struct Qdisc sch,
	298	struct sk_buff_head *list)
	299	{
	300	__skb_queue_tail(list, skb);
	301	sch->qstats.backlog += skb->len;
	302	sch->bstats.bytes += skb->len;
	303	sch->bstats.packets++;
	304
	305	return NET_XMIT_SUCCESS;
	306	}
	307
	308	static inline int qdisc_enqueue_tail(struct sk_buff skb, struct Qdisc sch)
	309	{
	310	return __qdisc_enqueue_tail(skb, sch, &sch->q);
	311	}
	312
	313	static inline struct sk_buff __qdisc_dequeue_head(struct Qdisc sch,
	314	struct sk_buff_head *list)
	315	{
	316	struct sk_buff *skb = __skb_dequeue(list);
	317
	318	if (likely(skb != NULL))
	319	sch->qstats.backlog -= skb->len;
	320
	321	return skb;
	322	}
	323
	324	static inline struct sk_buff qdisc_dequeue_head(struct Qdisc sch)
	325	{
	326	return __qdisc_dequeue_head(sch, &sch->q);
	327	}
	328
	329	static inline struct sk_buff __qdisc_dequeue_tail(struct Qdisc sch,
	330	struct sk_buff_head *list)
	331	{
	332	struct sk_buff *skb = __skb_dequeue_tail(list);
	333
	334	if (likely(skb != NULL))
	335	sch->qstats.backlog -= skb->len;
	336
	337	return skb;
	338	}
	339
	340	static inline struct sk_buff qdisc_dequeue_tail(struct Qdisc sch)
	341	{
	342	return __qdisc_dequeue_tail(sch, &sch->q);
	343	}
	344
	345	static inline int __qdisc_requeue(struct sk_buff skb, struct Qdisc sch,
	346	struct sk_buff_head *list)
	347	{
	348	__skb_queue_head(list, skb);
	349	sch->qstats.backlog += skb->len;
	350	sch->qstats.requeues++;
	351
	352	return NET_XMIT_SUCCESS;
	353	}
	354
	355	static inline int qdisc_requeue(struct sk_buff skb, struct Qdisc sch)
	356	{
	357	return __qdisc_requeue(skb, sch, &sch->q);
	358	}
	359
	360	static inline void __qdisc_reset_queue(struct Qdisc *sch,
361	struct sk_buff_head *list)
362	{
363	/*
364	* We do not know the backlog in bytes of this list, it
365	* is up to the caller to correct it
366	*/
367	skb_queue_purge(list);
368	}
369
370	static inline void qdisc_reset_queue(struct Qdisc *sch)
371	{
372	__qdisc_reset_queue(sch, &sch->q);
373	sch->qstats.backlog = 0;
374	}
375
376	static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
377	struct sk_buff_head *list)
378	{
379	struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
380
381	if (likely(skb != NULL)) {
382	unsigned int len = skb->len;
383	kfree_skb(skb);
384	return len;
385	}
386
387	return 0;
388	}
389
390	static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
391	{
392	return __qdisc_queue_drop(sch, &sch->q);
393	}
394
395	static inline int qdisc_drop(struct sk_buff skb, struct Qdisc sch)
396	{
397	kfree_skb(skb);
398	sch->qstats.drops++;
399
400	return NET_XMIT_DROP;
401	}
402
403	static inline int qdisc_reshape_fail(struct sk_buff skb, struct Qdisc sch)
404	{
405	sch->qstats.drops++;
406
c3bc7cff	407	#ifdef CONFIG_NET_CLS_ACT
9972b25d TG	408	if (sch->reshape_fail == NULL \|\| sch->reshape_fail(skb, sch))
	409	goto drop;
	410
	411	return NET_XMIT_SUCCESS;
	412
	413	drop:
	414	#endif
	415	kfree_skb(skb);
	416	return NET_XMIT_DROP;
	417	}
	418
e9bef55d JDB	419	/* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
	420	long it will take to send a packet given its size.
	421	*/
	422	static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
	423	{
e08b0998 JDB	424	int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
	425	if (slot < 0)
	426	slot = 0;
e9bef55d JDB	427	slot >>= rtab->rate.cell_log;
	428	if (slot > 255)
	429	return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]);
	430	return rtab->data[slot];
	431	}
	432
12da81d1 JHS	433	#ifdef CONFIG_NET_CLS_ACT
	434	static inline struct sk_buff skb_act_clone(struct sk_buff skb, gfp_t gfp_mask)
	435	{
	436	struct sk_buff *n = skb_clone(skb, gfp_mask);
	437
	438	if (n) {
	439	n->tc_verd = SET_TC_VERD(n->tc_verd, 0);
	440	n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd);
	441	n->tc_verd = CLR_TC_MUNGED(n->tc_verd);
12da81d1 JHS	442	}
	443	return n;
	444	}
	445	#endif
	446
1da177e4	447	#endif