[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/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_SCHED,
	__QDISC_STATE_DEACTIVATED,
	__QDISC_STATE_THROTTLED,
};

/*
 * following bits are only changed while qdisc lock is held
 */
enum qdisc___state_t {
	__QDISC___STATE_RUNNING = 1,
};

struct qdisc_size_table {
	struct rcu_head		rcu;
	struct list_head	list;
	struct tc_sizespec	szopts;
	int			refcnt;
	u16			data[];
};

struct Qdisc {
	int 			(*enqueue)(struct sk_buff *skb, struct Qdisc *dev);
	struct sk_buff *	(*dequeue)(struct Qdisc *dev);
	unsigned int		flags;
#define TCQ_F_BUILTIN		1
#define TCQ_F_INGRESS		2
#define TCQ_F_CAN_BYPASS	4
#define TCQ_F_MQROOT		8
#define TCQ_F_WARN_NONWC	(1 << 16)
	int			padded;
	const struct Qdisc_ops	*ops;
	struct qdisc_size_table	__rcu *stab;
	struct list_head	list;
	u32			handle;
	u32			parent;
	atomic_t		refcnt;
	struct gnet_stats_rate_est	rate_est;
	int			(*reshape_fail)(struct sk_buff *skb,
					struct Qdisc *q);

	void			*u32_node;

	/* 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 netdev_queue	*dev_queue;
	struct Qdisc		*next_sched;

	struct sk_buff		*gso_skb;
	/*
	 * For performance sake on SMP, we put highly modified fields at the end
	 */
	unsigned long		state;
	struct sk_buff_head	q;
	struct gnet_stats_basic_packed bstats;
	unsigned int		__state;
	struct gnet_stats_queue	qstats;
	struct rcu_head		rcu_head;
	spinlock_t		busylock;
	u32			limit;
};

static inline bool qdisc_is_running(const struct Qdisc *qdisc)
{
	return (qdisc->__state & __QDISC___STATE_RUNNING) ? true : false;
}

static inline bool qdisc_run_begin(struct Qdisc *qdisc)
{
	if (qdisc_is_running(qdisc))
		return false;
	qdisc->__state |= __QDISC___STATE_RUNNING;
	return true;
}

static inline void qdisc_run_end(struct Qdisc *qdisc)
{
	qdisc->__state &= ~__QDISC___STATE_RUNNING;
}

static inline bool qdisc_is_throttled(const struct Qdisc *qdisc)
{
	return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false;
}

static inline void qdisc_throttled(struct Qdisc *qdisc)
{
	set_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
}

static inline void qdisc_unthrottled(struct Qdisc *qdisc)
{
	clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
}

struct Qdisc_class_ops {
	/* Child qdisc manipulation */
	struct netdev_queue *	(*select_queue)(struct Qdisc *, struct tcmsg *);
	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 *);
	struct sk_buff *	(*peek)(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);
	void			(*attach)(struct Qdisc *);

	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 *,
					    const 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 *,
					    const struct tcf_proto *,
					    struct tcf_result *);
	__be16			protocol;

	/* All the rest */
	u32			prio;
	u32			classid;
	struct Qdisc		*q;
	void			*data;
	const struct tcf_proto_ops	*ops;
};

struct qdisc_skb_cb {
	unsigned int		pkt_len;
	long			data[];
};

static inline int qdisc_qlen(const struct Qdisc *q)
{
	return q->q.qlen;
}

static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb)
{
	return (struct qdisc_skb_cb *)skb->cb;
}

static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc)
{
	return &qdisc->q.lock;
}

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

static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc)
{
	return qdisc->dev_queue->qdisc_sleeping;
}

/* The qdisc root lock is a mechanism by which to top level
 * of a qdisc tree can be locked from any qdisc node in the
 * forest.  This allows changing the configuration of some
 * aspect of the qdisc tree while blocking out asynchronous
 * qdisc access in the packet processing paths.
 *
 * It is only legal to do this when the root will not change
 * on us.  Otherwise we'll potentially lock the wrong qdisc
 * root.  This is enforced by holding the RTNL semaphore, which
 * all users of this lock accessor must do.
 */
static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc)
{
	struct Qdisc *root = qdisc_root(qdisc);

	ASSERT_RTNL();
	return qdisc_lock(root);
}

static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc)
{
	struct Qdisc *root = qdisc_root_sleeping(qdisc);

	ASSERT_RTNL();
	return qdisc_lock(root);
}

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

static inline void sch_tree_lock(const struct Qdisc *q)
{
	spin_lock_bh(qdisc_root_sleeping_lock(q));
}

static inline void sch_tree_unlock(const struct Qdisc *q)
{
	spin_unlock_bh(qdisc_root_sleeping_lock(q));
}

#define tcf_tree_lock(tp)	sch_tree_lock((tp)->q)
#define tcf_tree_unlock(tp)	sch_tree_unlock((tp)->q)

extern struct Qdisc noop_qdisc;
extern struct Qdisc_ops noop_qdisc_ops;
extern struct Qdisc_ops pfifo_fast_ops;
extern struct Qdisc_ops mq_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(const 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 dev_deactivate_many(struct list_head *head);
extern struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue,
				     struct Qdisc *qdisc);
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 netdev_queue *dev_queue,
				       struct Qdisc_ops *ops, u32 parentid);
extern void __qdisc_calculate_pkt_len(struct sk_buff *skb,
				      const struct qdisc_size_table *stab);
extern void tcf_destroy(struct tcf_proto *tp);
extern void tcf_destroy_chain(struct tcf_proto **fl);

/* Reset all TX qdiscs greater then index of a device.  */
static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i)
{
	struct Qdisc *qdisc;

	for (; i < dev->num_tx_queues; i++) {
		qdisc = netdev_get_tx_queue(dev, i)->qdisc;
		if (qdisc) {
			spin_lock_bh(qdisc_lock(qdisc));
			qdisc_reset(qdisc);
			spin_unlock_bh(qdisc_lock(qdisc));
		}
	}
}

static inline void qdisc_reset_all_tx(struct net_device *dev)
{
	qdisc_reset_all_tx_gt(dev, 0);
}

/* 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(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 != 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 unsigned int qdisc_pkt_len(const struct sk_buff *skb)
{
	return qdisc_skb_cb(skb)->pkt_len;
}

/* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */
enum net_xmit_qdisc_t {
	__NET_XMIT_STOLEN = 0x00010000,
	__NET_XMIT_BYPASS = 0x00020000,
};

#ifdef CONFIG_NET_CLS_ACT
#define net_xmit_drop_count(e)	((e) & __NET_XMIT_STOLEN ? 0 : 1)
#else
#define net_xmit_drop_count(e)	(1)
#endif

static inline void qdisc_calculate_pkt_len(struct sk_buff *skb,
					   const struct Qdisc *sch)
{
#ifdef CONFIG_NET_SCHED
	struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab);

	if (stab)
		__qdisc_calculate_pkt_len(skb, stab);
#endif
}

static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
{
	qdisc_calculate_pkt_len(skb, sch);
	return sch->enqueue(skb, sch);
}

static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch)
{
	qdisc_skb_cb(skb)->pkt_len = skb->len;
	return qdisc_enqueue(skb, sch) & NET_XMIT_MASK;
}


static inline void bstats_update(struct gnet_stats_basic_packed *bstats,
				 const struct sk_buff *skb)
{
	bstats->bytes += qdisc_pkt_len(skb);
	bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
}

static inline void qdisc_bstats_update(struct Qdisc *sch,
				       const struct sk_buff *skb)
{
	bstats_update(&sch->bstats, skb);
}

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 += qdisc_pkt_len(skb);

	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 -= qdisc_pkt_len(skb);
		qdisc_bstats_update(sch, skb);
	}

	return skb;
}

static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch)
{
	return __qdisc_dequeue_head(sch, &sch->q);
}

static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch,
					      struct sk_buff_head *list)
{
	struct sk_buff *skb = __skb_dequeue(list);

	if (likely(skb != NULL)) {
		unsigned int len = qdisc_pkt_len(skb);
		sch->qstats.backlog -= len;
		kfree_skb(skb);
		return len;
	}

	return 0;
}

static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch)
{
	return __qdisc_queue_drop_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 -= qdisc_pkt_len(skb);

	return skb;
}

static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch)
{
	return __qdisc_dequeue_tail(sch, &sch->q);
}

static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch)
{
	return skb_peek(&sch->q);
}

/* generic pseudo peek method for non-work-conserving qdisc */
static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch)
{
	/* we can reuse ->gso_skb because peek isn't called for root qdiscs */
	if (!sch->gso_skb) {
		sch->gso_skb = sch->dequeue(sch);
		if (sch->gso_skb)
			/* it's still part of the queue */
			sch->q.qlen++;
	}

	return sch->gso_skb;
}

/* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */
static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch)
{
	struct sk_buff *skb = sch->gso_skb;

	if (skb) {
		sch->gso_skb = NULL;
		sch->q.qlen--;
	} else {
		skb = sch->dequeue(sch);
	}

	return skb;
}

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 = qdisc_pkt_len(skb);
		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,
					    int action)
{
	struct sk_buff *n;

	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>
1da177e4 LT	7	#include <linux/pkt_sched.h>
	8	#include <linux/pkt_cls.h>
	9	#include <net/gen_stats.h>
be577ddc	10	#include <net/rtnetlink.h>
1da177e4 LT	11
	12	struct Qdisc_ops;
	13	struct qdisc_walker;
	14	struct tcf_walker;
	15	struct module;
	16
fd2c3ef7	17	struct qdisc_rate_table {
1da177e4 LT	18	struct tc_ratespec rate;
	19	u32 data[256];
	20	struct qdisc_rate_table *next;
	21	int refcnt;
	22	};
	23
fd2c3ef7	24	enum qdisc_state_t {
37437bb2	25	__QDISC_STATE_SCHED,
a9312ae8	26	__QDISC_STATE_DEACTIVATED,
ef352e7c	27	__QDISC_STATE_THROTTLED,
e2627c8c DM	28	};
e2627c8c DM	29
37112105 ED	30	/*
	31	* following bits are only changed while qdisc lock is held
	32	*/
	33	enum qdisc___state_t {
fd245a4a	34	__QDISC___STATE_RUNNING = 1,
37112105 ED	35	};
37112105 ED	36
175f9c1b	37	struct qdisc_size_table {
a2da570d	38	struct rcu_head rcu;
175f9c1b JK	39	struct list_head list;
	40	struct tc_sizespec szopts;
	41	int refcnt;
	42	u16 data[];
	43	};
	44
fd2c3ef7	45	struct Qdisc {
1da177e4 LT	46	int (enqueue)(struct sk_buff skb, struct Qdisc *dev);
1da177e4 LT	47	struct sk_buff * (dequeue)(struct Qdisc dev);
05bdd2f1	48	unsigned int flags;
b00355db	49	#define TCQ_F_BUILTIN 1
fd245a4a ED	50	#define TCQ_F_INGRESS 2
	51	#define TCQ_F_CAN_BYPASS 4
	52	#define TCQ_F_MQROOT 8
b00355db	53	#define TCQ_F_WARN_NONWC (1 << 16)
1da177e4	54	int padded;
05bdd2f1	55	const struct Qdisc_ops *ops;
a2da570d	56	struct qdisc_size_table __rcu *stab;
5e140dfc	57	struct list_head list;
1da177e4 LT	58	u32 handle;
	59	u32 parent;
	60	atomic_t refcnt;
1da177e4	61	struct gnet_stats_rate_est rate_est;
1da177e4 LT	62	int (reshape_fail)(struct sk_buff skb,
	63	struct Qdisc *q);
	64
72b25a91 DM	65	void *u32_node;
72b25a91 DM	66
1da177e4 LT	67	/* This field is deprecated, but it is still used by CBQ
	68	* and it will live until better solution will be invented.
	69	*/
	70	struct Qdisc *__parent;
5e140dfc ED	71	struct netdev_queue *dev_queue;
	72	struct Qdisc *next_sched;
	73
	74	struct sk_buff *gso_skb;
	75	/*
	76	* For performance sake on SMP, we put highly modified fields at the end
	77	*/
	78	unsigned long state;
	79	struct sk_buff_head q;
c1a8f1f1	80	struct gnet_stats_basic_packed bstats;
fd245a4a	81	unsigned int __state;
5e140dfc	82	struct gnet_stats_queue qstats;
79640a4c ED	83	struct rcu_head rcu_head;
79640a4c ED	84	spinlock_t busylock;
d276055c	85	u32 limit;
1da177e4 LT	86	};
1da177e4 LT	87
fd245a4a	88	static inline bool qdisc_is_running(const struct Qdisc *qdisc)
bc135b23	89	{
fd245a4a	90	return (qdisc->__state & __QDISC___STATE_RUNNING) ? true : false;
bc135b23 ED	91	}
	92
	93	static inline bool qdisc_run_begin(struct Qdisc *qdisc)
	94	{
fd245a4a ED	95	if (qdisc_is_running(qdisc))
	96	return false;
	97	qdisc->__state \|= __QDISC___STATE_RUNNING;
	98	return true;
bc135b23 ED	99	}
	100
	101	static inline void qdisc_run_end(struct Qdisc *qdisc)
	102	{
fd245a4a ED	103	qdisc->__state &= ~__QDISC___STATE_RUNNING;
	104	}
	105
	106	static inline bool qdisc_is_throttled(const struct Qdisc *qdisc)
	107	{
ef352e7c	108	return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false;
fd245a4a ED	109	}
	110
	111	static inline void qdisc_throttled(struct Qdisc *qdisc)
	112	{
ef352e7c	113	set_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
fd245a4a ED	114	}
	115
	116	static inline void qdisc_unthrottled(struct Qdisc *qdisc)
	117	{
ef352e7c	118	clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
bc135b23 ED	119	}
bc135b23 ED	120
fd2c3ef7	121	struct Qdisc_class_ops {
1da177e4	122	/* Child qdisc manipulation */
926e61b7	123	struct netdev_queue * (select_queue)(struct Qdisc , struct tcmsg *);
1da177e4 LT	124	int (graft)(struct Qdisc , unsigned long cl,
	125	struct Qdisc , struct Qdisc *);
	126	struct Qdisc * (leaf)(struct Qdisc , unsigned long cl);
43effa1e	127	void (qlen_notify)(struct Qdisc , unsigned long);
1da177e4 LT	128
	129	/* Class manipulation routines */
	130	unsigned long (get)(struct Qdisc , u32 classid);
	131	void (put)(struct Qdisc , unsigned long);
	132	int (change)(struct Qdisc , u32, u32,
1e90474c	133	struct nlattr *, unsigned long );
1da177e4 LT	134	int (delete)(struct Qdisc , unsigned long);
	135	void (walk)(struct Qdisc , struct qdisc_walker * arg);
	136
	137	/* Filter manipulation */
	138	struct tcf_proto ** (tcf_chain)(struct Qdisc , unsigned long);
	139	unsigned long (bind_tcf)(struct Qdisc , unsigned long,
	140	u32 classid);
	141	void (unbind_tcf)(struct Qdisc , unsigned long);
	142
	143	/* rtnetlink specific */
	144	int (dump)(struct Qdisc , unsigned long,
	145	struct sk_buff skb, struct tcmsg);
	146	int (dump_stats)(struct Qdisc , unsigned long,
	147	struct gnet_dump *);
	148	};
	149
fd2c3ef7	150	struct Qdisc_ops {
1da177e4	151	struct Qdisc_ops *next;
20fea08b	152	const struct Qdisc_class_ops *cl_ops;
1da177e4 LT	153	char id[IFNAMSIZ];
	154	int priv_size;
	155
	156	int (enqueue)(struct sk_buff , struct Qdisc *);
	157	struct sk_buff * (dequeue)(struct Qdisc );
90d841fd	158	struct sk_buff * (peek)(struct Qdisc );
1da177e4 LT	159	unsigned int (drop)(struct Qdisc );
1da177e4 LT	160
1e90474c	161	int (init)(struct Qdisc , struct nlattr *arg);
1da177e4 LT	162	void (reset)(struct Qdisc );
1da177e4 LT	163	void (destroy)(struct Qdisc );
1e90474c	164	int (change)(struct Qdisc , struct nlattr *arg);
6ec1c69a	165	void (attach)(struct Qdisc );
1da177e4 LT	166
	167	int (dump)(struct Qdisc , struct sk_buff *);
	168	int (dump_stats)(struct Qdisc , struct gnet_dump *);
	169
	170	struct module *owner;
	171	};
	172
	173
fd2c3ef7	174	struct tcf_result {
1da177e4 LT	175	unsigned long class;
	176	u32 classid;
	177	};
	178
fd2c3ef7	179	struct tcf_proto_ops {
1da177e4 LT	180	struct tcf_proto_ops *next;
	181	char kind[IFNAMSIZ];
	182
dc7f9f6e ED	183	int (classify)(struct sk_buff ,
	184	const struct tcf_proto *,
	185	struct tcf_result *);
1da177e4 LT	186	int (init)(struct tcf_proto);
	187	void (destroy)(struct tcf_proto);
	188
	189	unsigned long (get)(struct tcf_proto, u32 handle);
	190	void (put)(struct tcf_proto, unsigned long);
	191	int (change)(struct tcf_proto, unsigned long,
add93b61	192	u32 handle, struct nlattr **,
1da177e4 LT	193	unsigned long *);
	194	int (delete)(struct tcf_proto, unsigned long);
	195	void (walk)(struct tcf_proto, struct tcf_walker *arg);
	196
	197	/* rtnetlink specific */
	198	int (dump)(struct tcf_proto, unsigned long,
	199	struct sk_buff skb, struct tcmsg);
	200
	201	struct module *owner;
	202	};
	203
fd2c3ef7	204	struct tcf_proto {
1da177e4 LT	205	/* Fast access part */
	206	struct tcf_proto *next;
	207	void *root;
dc7f9f6e ED	208	int (classify)(struct sk_buff ,
	209	const struct tcf_proto *,
	210	struct tcf_result *);
66c6f529	211	__be16 protocol;
1da177e4 LT	212
	213	/* All the rest */
	214	u32 prio;
	215	u32 classid;
	216	struct Qdisc *q;
	217	void *data;
dc7f9f6e	218	const struct tcf_proto_ops *ops;
1da177e4 LT	219	};
1da177e4 LT	220
175f9c1b JK	221	struct qdisc_skb_cb {
175f9c1b JK	222	unsigned int pkt_len;
9e924cf4	223	long data[];
175f9c1b JK	224	};
175f9c1b JK	225
05bdd2f1	226	static inline int qdisc_qlen(const struct Qdisc *q)
bbd8a0d3 KK	227	{
	228	return q->q.qlen;
	229	}
	230
bfe0d029	231	static inline struct qdisc_skb_cb qdisc_skb_cb(const struct sk_buff skb)
175f9c1b JK	232	{
	233	return (struct qdisc_skb_cb *)skb->cb;
	234	}
	235
83874000 DM	236	static inline spinlock_t qdisc_lock(struct Qdisc qdisc)
	237	{
	238	return &qdisc->q.lock;
	239	}
	240
05bdd2f1	241	static inline struct Qdisc qdisc_root(const struct Qdisc qdisc)
7698b4fc DM	242	{
	243	return qdisc->dev_queue->qdisc;
	244	}
	245
05bdd2f1	246	static inline struct Qdisc qdisc_root_sleeping(const struct Qdisc qdisc)
2540e051 JP	247	{
	248	return qdisc->dev_queue->qdisc_sleeping;
	249	}
	250
7e43f112 DM	251	/* The qdisc root lock is a mechanism by which to top level
	252	* of a qdisc tree can be locked from any qdisc node in the
	253	* forest. This allows changing the configuration of some
	254	* aspect of the qdisc tree while blocking out asynchronous
	255	* qdisc access in the packet processing paths.
	256	*
	257	* It is only legal to do this when the root will not change
	258	* on us. Otherwise we'll potentially lock the wrong qdisc
	259	* root. This is enforced by holding the RTNL semaphore, which
	260	* all users of this lock accessor must do.
	261	*/
05bdd2f1	262	static inline spinlock_t qdisc_root_lock(const struct Qdisc qdisc)
7698b4fc DM	263	{
	264	struct Qdisc *root = qdisc_root(qdisc);
	265
7e43f112	266	ASSERT_RTNL();
83874000	267	return qdisc_lock(root);
7698b4fc DM	268	}
7698b4fc DM	269
05bdd2f1	270	static inline spinlock_t qdisc_root_sleeping_lock(const struct Qdisc qdisc)
f6f9b93f JP	271	{
	272	struct Qdisc *root = qdisc_root_sleeping(qdisc);
	273
	274	ASSERT_RTNL();
	275	return qdisc_lock(root);
	276	}
	277
05bdd2f1	278	static inline struct net_device qdisc_dev(const struct Qdisc qdisc)
5ce2d488 DM	279	{
	280	return qdisc->dev_queue->dev;
	281	}
1da177e4	282
05bdd2f1	283	static inline void sch_tree_lock(const struct Qdisc *q)
78a5b30b	284	{
fe439dd0	285	spin_lock_bh(qdisc_root_sleeping_lock(q));
78a5b30b DM	286	}
78a5b30b DM	287
05bdd2f1	288	static inline void sch_tree_unlock(const struct Qdisc *q)
78a5b30b	289	{
fe439dd0	290	spin_unlock_bh(qdisc_root_sleeping_lock(q));
78a5b30b DM	291	}
	292
	293	#define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
	294	#define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
1da177e4	295
e41a33e6 TG	296	extern struct Qdisc noop_qdisc;
e41a33e6 TG	297	extern struct Qdisc_ops noop_qdisc_ops;
6ec1c69a DM	298	extern struct Qdisc_ops pfifo_fast_ops;
6ec1c69a DM	299	extern struct Qdisc_ops mq_qdisc_ops;
e41a33e6	300
fd2c3ef7	301	struct Qdisc_class_common {
6fe1c7a5 PM	302	u32 classid;
	303	struct hlist_node hnode;
	304	};
	305
fd2c3ef7	306	struct Qdisc_class_hash {
6fe1c7a5 PM	307	struct hlist_head *hash;
	308	unsigned int hashsize;
	309	unsigned int hashmask;
	310	unsigned int hashelems;
	311	};
	312
	313	static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
	314	{
	315	id ^= id >> 8;
	316	id ^= id >> 4;
	317	return id & mask;
	318	}
	319
	320	static inline struct Qdisc_class_common *
05bdd2f1	321	qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id)
6fe1c7a5 PM	322	{
	323	struct Qdisc_class_common *cl;
	324	struct hlist_node *n;
	325	unsigned int h;
	326
	327	h = qdisc_class_hash(id, hash->hashmask);
	328	hlist_for_each_entry(cl, n, &hash->hash[h], hnode) {
	329	if (cl->classid == id)
	330	return cl;
	331	}
	332	return NULL;
	333	}
	334
	335	extern int qdisc_class_hash_init(struct Qdisc_class_hash *);
	336	extern void qdisc_class_hash_insert(struct Qdisc_class_hash , struct Qdisc_class_common );
	337	extern void qdisc_class_hash_remove(struct Qdisc_class_hash , struct Qdisc_class_common );
	338	extern void qdisc_class_hash_grow(struct Qdisc , struct Qdisc_class_hash );
	339	extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
	340
e41a33e6 TG	341	extern void dev_init_scheduler(struct net_device *dev);
	342	extern void dev_shutdown(struct net_device *dev);
	343	extern void dev_activate(struct net_device *dev);
	344	extern void dev_deactivate(struct net_device *dev);
44345724	345	extern void dev_deactivate_many(struct list_head *head);
589983cd PM	346	extern struct Qdisc dev_graft_qdisc(struct netdev_queue dev_queue,
589983cd PM	347	struct Qdisc *qdisc);
e41a33e6 TG	348	extern void qdisc_reset(struct Qdisc *qdisc);
e41a33e6 TG	349	extern void qdisc_destroy(struct Qdisc *qdisc);
43effa1e	350	extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n);
5ce2d488	351	extern struct Qdisc qdisc_alloc(struct netdev_queue dev_queue,
bb949fbd	352	struct Qdisc_ops *ops);
3511c913	353	extern struct Qdisc qdisc_create_dflt(struct netdev_queue dev_queue,
9f9afec4	354	struct Qdisc_ops *ops, u32 parentid);
a2da570d ED	355	extern void __qdisc_calculate_pkt_len(struct sk_buff *skb,
a2da570d ED	356	const struct qdisc_size_table *stab);
a48b5a61	357	extern void tcf_destroy(struct tcf_proto *tp);
ff31ab56	358	extern void tcf_destroy_chain(struct tcf_proto **fl);
1da177e4	359
f0796d5c JF	360	/* Reset all TX qdiscs greater then index of a device. */
f0796d5c JF	361	static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i)
5aa70995	362	{
4ef6acff JF	363	struct Qdisc *qdisc;
4ef6acff JF	364
f0796d5c	365	for (; i < dev->num_tx_queues; i++) {
4ef6acff JF	366	qdisc = netdev_get_tx_queue(dev, i)->qdisc;
	367	if (qdisc) {
	368	spin_lock_bh(qdisc_lock(qdisc));
	369	qdisc_reset(qdisc);
	370	spin_unlock_bh(qdisc_lock(qdisc));
	371	}
	372	}
5aa70995 DM	373	}
5aa70995 DM	374
5aa70995 DM	375	static inline void qdisc_reset_all_tx(struct net_device *dev)
5aa70995 DM	376	{
f0796d5c	377	qdisc_reset_all_tx_gt(dev, 0);
5aa70995 DM	378	}
5aa70995 DM	379
3e745dd6 DM	380	/* Are all TX queues of the device empty? */
	381	static inline bool qdisc_all_tx_empty(const struct net_device *dev)
	382	{
e8a0464c DM	383	unsigned int i;
	384	for (i = 0; i < dev->num_tx_queues; i++) {
	385	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	386	const struct Qdisc *q = txq->qdisc;
3e745dd6	387
e8a0464c DM	388	if (q->q.qlen)
	389	return false;
	390	}
	391	return true;
3e745dd6 DM	392	}
3e745dd6 DM	393
6fa9864b	394	/* Are any of the TX qdiscs changing? */
05bdd2f1	395	static inline bool qdisc_tx_changing(const struct net_device *dev)
6fa9864b	396	{
e8a0464c DM	397	unsigned int i;
	398	for (i = 0; i < dev->num_tx_queues; i++) {
	399	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	400	if (txq->qdisc != txq->qdisc_sleeping)
	401	return true;
	402	}
	403	return false;
6fa9864b DM	404	}
6fa9864b DM	405
e8a0464c	406	/* Is the device using the noop qdisc on all queues? */
05297949 DM	407	static inline bool qdisc_tx_is_noop(const struct net_device *dev)
05297949 DM	408	{
e8a0464c DM	409	unsigned int i;
	410	for (i = 0; i < dev->num_tx_queues; i++) {
	411	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	412	if (txq->qdisc != &noop_qdisc)
	413	return false;
	414	}
	415	return true;
05297949 DM	416	}
05297949 DM	417
bfe0d029	418	static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb)
0abf77e5	419	{
175f9c1b	420	return qdisc_skb_cb(skb)->pkt_len;
0abf77e5 JK	421	}
0abf77e5 JK	422
c27f339a	423	/* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */
378a2f09 JP	424	enum net_xmit_qdisc_t {
378a2f09 JP	425	__NET_XMIT_STOLEN = 0x00010000,
c27f339a	426	__NET_XMIT_BYPASS = 0x00020000,
378a2f09 JP	427	};
378a2f09 JP	428
c27f339a	429	#ifdef CONFIG_NET_CLS_ACT
378a2f09	430	#define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
378a2f09 JP	431	#else
	432	#define net_xmit_drop_count(e) (1)
	433	#endif
	434
a2da570d ED	435	static inline void qdisc_calculate_pkt_len(struct sk_buff *skb,
a2da570d ED	436	const struct Qdisc *sch)
5f86173b	437	{
3a682fbd	438	#ifdef CONFIG_NET_SCHED
a2da570d ED	439	struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab);
	440
	441	if (stab)
	442	__qdisc_calculate_pkt_len(skb, stab);
3a682fbd	443	#endif
a2da570d ED	444	}
	445
	446	static inline int qdisc_enqueue(struct sk_buff skb, struct Qdisc sch)
	447	{
	448	qdisc_calculate_pkt_len(skb, sch);
5f86173b JK	449	return sch->enqueue(skb, sch);
	450	}
	451
	452	static inline int qdisc_enqueue_root(struct sk_buff skb, struct Qdisc sch)
	453	{
175f9c1b	454	qdisc_skb_cb(skb)->pkt_len = skb->len;
378a2f09	455	return qdisc_enqueue(skb, sch) & NET_XMIT_MASK;
5f86173b JK	456	}
5f86173b JK	457
bfe0d029 ED	458
	459	static inline void bstats_update(struct gnet_stats_basic_packed *bstats,
	460	const struct sk_buff *skb)
	461	{
	462	bstats->bytes += qdisc_pkt_len(skb);
	463	bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
	464	}
	465
	466	static inline void qdisc_bstats_update(struct Qdisc *sch,
	467	const struct sk_buff *skb)
bbd8a0d3	468	{
bfe0d029	469	bstats_update(&sch->bstats, skb);
bbd8a0d3 KK	470	}
bbd8a0d3 KK	471
9972b25d TG	472	static inline int __qdisc_enqueue_tail(struct sk_buff skb, struct Qdisc sch,
	473	struct sk_buff_head *list)
	474	{
	475	__skb_queue_tail(list, skb);
0abf77e5	476	sch->qstats.backlog += qdisc_pkt_len(skb);
9972b25d TG	477
	478	return NET_XMIT_SUCCESS;
	479	}
	480
	481	static inline int qdisc_enqueue_tail(struct sk_buff skb, struct Qdisc sch)
	482	{
	483	return __qdisc_enqueue_tail(skb, sch, &sch->q);
	484	}
	485
	486	static inline struct sk_buff __qdisc_dequeue_head(struct Qdisc sch,
	487	struct sk_buff_head *list)
	488	{
	489	struct sk_buff *skb = __skb_dequeue(list);
	490
9190b3b3	491	if (likely(skb != NULL)) {
0abf77e5	492	sch->qstats.backlog -= qdisc_pkt_len(skb);
9190b3b3 ED	493	qdisc_bstats_update(sch, skb);
9190b3b3 ED	494	}
9972b25d TG	495
	496	return skb;
	497	}
	498
	499	static inline struct sk_buff qdisc_dequeue_head(struct Qdisc sch)
	500	{
	501	return __qdisc_dequeue_head(sch, &sch->q);
57dbb2d8 HPP	502	}
	503
	504	static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch,
	505	struct sk_buff_head *list)
	506	{
9190b3b3	507	struct sk_buff *skb = __skb_dequeue(list);
57dbb2d8 HPP	508
	509	if (likely(skb != NULL)) {
	510	unsigned int len = qdisc_pkt_len(skb);
9190b3b3	511	sch->qstats.backlog -= len;
57dbb2d8 HPP	512	kfree_skb(skb);
	513	return len;
	514	}
	515
	516	return 0;
	517	}
	518
	519	static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch)
	520	{
	521	return __qdisc_queue_drop_head(sch, &sch->q);
9972b25d TG	522	}
	523
	524	static inline struct sk_buff __qdisc_dequeue_tail(struct Qdisc sch,
	525	struct sk_buff_head *list)
	526	{
	527	struct sk_buff *skb = __skb_dequeue_tail(list);
	528
	529	if (likely(skb != NULL))
0abf77e5	530	sch->qstats.backlog -= qdisc_pkt_len(skb);
9972b25d TG	531
	532	return skb;
	533	}
	534
	535	static inline struct sk_buff qdisc_dequeue_tail(struct Qdisc sch)
	536	{
	537	return __qdisc_dequeue_tail(sch, &sch->q);
	538	}
	539
48a8f519 PM	540	static inline struct sk_buff qdisc_peek_head(struct Qdisc sch)
	541	{
	542	return skb_peek(&sch->q);
	543	}
	544
77be155c JP	545	/* generic pseudo peek method for non-work-conserving qdisc */
	546	static inline struct sk_buff qdisc_peek_dequeued(struct Qdisc sch)
	547	{
	548	/* we can reuse ->gso_skb because peek isn't called for root qdiscs */
61c9eaf9	549	if (!sch->gso_skb) {
77be155c	550	sch->gso_skb = sch->dequeue(sch);
61c9eaf9 JP	551	if (sch->gso_skb)
	552	/* it's still part of the queue */
	553	sch->q.qlen++;
	554	}
77be155c JP	555
	556	return sch->gso_skb;
	557	}
	558
	559	/* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */
	560	static inline struct sk_buff qdisc_dequeue_peeked(struct Qdisc sch)
	561	{
	562	struct sk_buff *skb = sch->gso_skb;
	563
61c9eaf9	564	if (skb) {
77be155c	565	sch->gso_skb = NULL;
61c9eaf9 JP	566	sch->q.qlen--;
61c9eaf9 JP	567	} else {
77be155c	568	skb = sch->dequeue(sch);
61c9eaf9	569	}
77be155c JP	570
	571	return skb;
	572	}
	573
9972b25d TG	574	static inline void __qdisc_reset_queue(struct Qdisc *sch,
	575	struct sk_buff_head *list)
	576	{
	577	/*
	578	* We do not know the backlog in bytes of this list, it
	579	* is up to the caller to correct it
	580	*/
93245dd6	581	__skb_queue_purge(list);
9972b25d TG	582	}
	583
	584	static inline void qdisc_reset_queue(struct Qdisc *sch)
	585	{
	586	__qdisc_reset_queue(sch, &sch->q);
	587	sch->qstats.backlog = 0;
	588	}
	589
	590	static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
	591	struct sk_buff_head *list)
	592	{
	593	struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
	594
	595	if (likely(skb != NULL)) {
0abf77e5	596	unsigned int len = qdisc_pkt_len(skb);
9972b25d TG	597	kfree_skb(skb);
	598	return len;
	599	}
	600
	601	return 0;
	602	}
	603
	604	static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
	605	{
	606	return __qdisc_queue_drop(sch, &sch->q);
	607	}
	608
	609	static inline int qdisc_drop(struct sk_buff skb, struct Qdisc sch)
	610	{
	611	kfree_skb(skb);
	612	sch->qstats.drops++;
	613
	614	return NET_XMIT_DROP;
	615	}
	616
	617	static inline int qdisc_reshape_fail(struct sk_buff skb, struct Qdisc sch)
	618	{
	619	sch->qstats.drops++;
	620
c3bc7cff	621	#ifdef CONFIG_NET_CLS_ACT
9972b25d TG	622	if (sch->reshape_fail == NULL \|\| sch->reshape_fail(skb, sch))
	623	goto drop;
	624
	625	return NET_XMIT_SUCCESS;
	626
	627	drop:
	628	#endif
	629	kfree_skb(skb);
	630	return NET_XMIT_DROP;
	631	}
	632
e9bef55d JDB	633	/* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
	634	long it will take to send a packet given its size.
	635	*/
	636	static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
	637	{
e08b0998 JDB	638	int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
	639	if (slot < 0)
	640	slot = 0;
e9bef55d JDB	641	slot >>= rtab->rate.cell_log;
e9bef55d JDB	642	if (slot > 255)
a02cec21	643	return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF];
e9bef55d JDB	644	return rtab->data[slot];
	645	}
	646
12da81d1	647	#ifdef CONFIG_NET_CLS_ACT
210d6de7 CG	648	static inline struct sk_buff skb_act_clone(struct sk_buff skb, gfp_t gfp_mask,
210d6de7 CG	649	int action)
12da81d1	650	{
210d6de7 CG	651	struct sk_buff *n;
210d6de7 CG	652
17302107	653	n = skb_clone(skb, gfp_mask);
12da81d1 JHS	654
	655	if (n) {
	656	n->tc_verd = SET_TC_VERD(n->tc_verd, 0);
	657	n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd);
	658	n->tc_verd = CLR_TC_MUNGED(n->tc_verd);
12da81d1 JHS	659	}
	660	return n;
	661	}
	662	#endif
	663
1da177e4	664	#endif