[linux-2.6-block.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_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		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;
	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(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(struct Qdisc *qdisc)
{
	return qdisc->dev_queue->qdisc;
}

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

	ASSERT_RTNL();
	return qdisc_lock(root);
}

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

	ASSERT_RTNL();
	return qdisc_lock(root);
}

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

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

static inline void sch_tree_unlock(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(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(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>
	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
fd2c3ef7	18	struct qdisc_rate_table {
1da177e4 LT	19	struct tc_ratespec rate;
	20	u32 data[256];
	21	struct qdisc_rate_table *next;
	22	int refcnt;
	23	};
	24
fd2c3ef7	25	enum qdisc_state_t {
37437bb2	26	__QDISC_STATE_SCHED,
a9312ae8	27	__QDISC_STATE_DEACTIVATED,
ef352e7c	28	__QDISC_STATE_THROTTLED,
e2627c8c DM	29	};
e2627c8c DM	30
37112105 ED	31	/*
	32	* following bits are only changed while qdisc lock is held
	33	*/
	34	enum qdisc___state_t {
fd245a4a	35	__QDISC___STATE_RUNNING = 1,
37112105 ED	36	};
37112105 ED	37
175f9c1b	38	struct qdisc_size_table {
a2da570d	39	struct rcu_head rcu;
175f9c1b JK	40	struct list_head list;
	41	struct tc_sizespec szopts;
	42	int refcnt;
	43	u16 data[];
	44	};
	45
fd2c3ef7	46	struct Qdisc {
1da177e4 LT	47	int (enqueue)(struct sk_buff skb, struct Qdisc *dev);
	48	struct sk_buff * (dequeue)(struct Qdisc dev);
	49	unsigned flags;
b00355db	50	#define TCQ_F_BUILTIN 1
fd245a4a ED	51	#define TCQ_F_INGRESS 2
	52	#define TCQ_F_CAN_BYPASS 4
	53	#define TCQ_F_MQROOT 8
b00355db	54	#define TCQ_F_WARN_NONWC (1 << 16)
1da177e4 LT	55	int padded;
1da177e4 LT	56	struct Qdisc_ops *ops;
a2da570d	57	struct qdisc_size_table __rcu *stab;
5e140dfc	58	struct list_head list;
1da177e4 LT	59	u32 handle;
	60	u32 parent;
	61	atomic_t refcnt;
1da177e4	62	struct gnet_stats_rate_est rate_est;
1da177e4 LT	63	int (reshape_fail)(struct sk_buff skb,
	64	struct Qdisc *q);
	65
72b25a91 DM	66	void *u32_node;
72b25a91 DM	67
1da177e4 LT	68	/* This field is deprecated, but it is still used by CBQ
	69	* and it will live until better solution will be invented.
	70	*/
	71	struct Qdisc *__parent;
5e140dfc ED	72	struct netdev_queue *dev_queue;
	73	struct Qdisc *next_sched;
	74
	75	struct sk_buff *gso_skb;
	76	/*
	77	* For performance sake on SMP, we put highly modified fields at the end
	78	*/
	79	unsigned long state;
	80	struct sk_buff_head q;
c1a8f1f1	81	struct gnet_stats_basic_packed bstats;
fd245a4a	82	unsigned int __state;
5e140dfc	83	struct gnet_stats_queue qstats;
79640a4c ED	84	struct rcu_head rcu_head;
79640a4c ED	85	spinlock_t busylock;
d276055c	86	u32 limit;
1da177e4 LT	87	};
1da177e4 LT	88
fd245a4a	89	static inline bool qdisc_is_running(const struct Qdisc *qdisc)
bc135b23	90	{
fd245a4a	91	return (qdisc->__state & __QDISC___STATE_RUNNING) ? true : false;
bc135b23 ED	92	}
	93
	94	static inline bool qdisc_run_begin(struct Qdisc *qdisc)
	95	{
fd245a4a ED	96	if (qdisc_is_running(qdisc))
	97	return false;
	98	qdisc->__state \|= __QDISC___STATE_RUNNING;
	99	return true;
bc135b23 ED	100	}
	101
	102	static inline void qdisc_run_end(struct Qdisc *qdisc)
	103	{
fd245a4a ED	104	qdisc->__state &= ~__QDISC___STATE_RUNNING;
	105	}
	106
	107	static inline bool qdisc_is_throttled(const struct Qdisc *qdisc)
	108	{
ef352e7c	109	return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false;
fd245a4a ED	110	}
	111
	112	static inline void qdisc_throttled(struct Qdisc *qdisc)
	113	{
ef352e7c	114	set_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
fd245a4a ED	115	}
	116
	117	static inline void qdisc_unthrottled(struct Qdisc *qdisc)
	118	{
ef352e7c	119	clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
bc135b23 ED	120	}
bc135b23 ED	121
fd2c3ef7	122	struct Qdisc_class_ops {
1da177e4	123	/* Child qdisc manipulation */
926e61b7	124	struct netdev_queue * (select_queue)(struct Qdisc , struct tcmsg *);
1da177e4 LT	125	int (graft)(struct Qdisc , unsigned long cl,
	126	struct Qdisc , struct Qdisc *);
	127	struct Qdisc * (leaf)(struct Qdisc , unsigned long cl);
43effa1e	128	void (qlen_notify)(struct Qdisc , unsigned long);
1da177e4 LT	129
	130	/* Class manipulation routines */
	131	unsigned long (get)(struct Qdisc , u32 classid);
	132	void (put)(struct Qdisc , unsigned long);
	133	int (change)(struct Qdisc , u32, u32,
1e90474c	134	struct nlattr *, unsigned long );
1da177e4 LT	135	int (delete)(struct Qdisc , unsigned long);
	136	void (walk)(struct Qdisc , struct qdisc_walker * arg);
	137
	138	/* Filter manipulation */
	139	struct tcf_proto ** (tcf_chain)(struct Qdisc , unsigned long);
	140	unsigned long (bind_tcf)(struct Qdisc , unsigned long,
	141	u32 classid);
	142	void (unbind_tcf)(struct Qdisc , unsigned long);
	143
	144	/* rtnetlink specific */
	145	int (dump)(struct Qdisc , unsigned long,
	146	struct sk_buff skb, struct tcmsg);
	147	int (dump_stats)(struct Qdisc , unsigned long,
	148	struct gnet_dump *);
	149	};
	150
fd2c3ef7	151	struct Qdisc_ops {
1da177e4	152	struct Qdisc_ops *next;
20fea08b	153	const struct Qdisc_class_ops *cl_ops;
1da177e4 LT	154	char id[IFNAMSIZ];
	155	int priv_size;
	156
	157	int (enqueue)(struct sk_buff , struct Qdisc *);
	158	struct sk_buff * (dequeue)(struct Qdisc );
90d841fd	159	struct sk_buff * (peek)(struct Qdisc );
1da177e4 LT	160	unsigned int (drop)(struct Qdisc );
1da177e4 LT	161
1e90474c	162	int (init)(struct Qdisc , struct nlattr *arg);
1da177e4 LT	163	void (reset)(struct Qdisc );
1da177e4 LT	164	void (destroy)(struct Qdisc );
1e90474c	165	int (change)(struct Qdisc , struct nlattr *arg);
6ec1c69a	166	void (attach)(struct Qdisc );
1da177e4 LT	167
	168	int (dump)(struct Qdisc , struct sk_buff *);
	169	int (dump_stats)(struct Qdisc , struct gnet_dump *);
	170
	171	struct module *owner;
	172	};
	173
	174
fd2c3ef7	175	struct tcf_result {
1da177e4 LT	176	unsigned long class;
	177	u32 classid;
	178	};
	179
fd2c3ef7	180	struct tcf_proto_ops {
1da177e4 LT	181	struct tcf_proto_ops *next;
	182	char kind[IFNAMSIZ];
	183
dc7f9f6e ED	184	int (classify)(struct sk_buff ,
	185	const struct tcf_proto *,
	186	struct tcf_result *);
1da177e4 LT	187	int (init)(struct tcf_proto);
	188	void (destroy)(struct tcf_proto);
	189
	190	unsigned long (get)(struct tcf_proto, u32 handle);
	191	void (put)(struct tcf_proto, unsigned long);
	192	int (change)(struct tcf_proto, unsigned long,
add93b61	193	u32 handle, struct nlattr **,
1da177e4 LT	194	unsigned long *);
	195	int (delete)(struct tcf_proto, unsigned long);
	196	void (walk)(struct tcf_proto, struct tcf_walker *arg);
	197
	198	/* rtnetlink specific */
	199	int (dump)(struct tcf_proto, unsigned long,
	200	struct sk_buff skb, struct tcmsg);
	201
	202	struct module *owner;
	203	};
	204
fd2c3ef7	205	struct tcf_proto {
1da177e4 LT	206	/* Fast access part */
	207	struct tcf_proto *next;
	208	void *root;
dc7f9f6e ED	209	int (classify)(struct sk_buff ,
	210	const struct tcf_proto *,
	211	struct tcf_result *);
66c6f529	212	__be16 protocol;
1da177e4 LT	213
	214	/* All the rest */
	215	u32 prio;
	216	u32 classid;
	217	struct Qdisc *q;
	218	void *data;
dc7f9f6e	219	const struct tcf_proto_ops *ops;
1da177e4 LT	220	};
1da177e4 LT	221
175f9c1b JK	222	struct qdisc_skb_cb {
175f9c1b JK	223	unsigned int pkt_len;
9e924cf4	224	long data[];
175f9c1b JK	225	};
175f9c1b JK	226
bbd8a0d3 KK	227	static inline int qdisc_qlen(struct Qdisc *q)
	228	{
	229	return q->q.qlen;
	230	}
	231
bfe0d029	232	static inline struct qdisc_skb_cb qdisc_skb_cb(const struct sk_buff skb)
175f9c1b JK	233	{
	234	return (struct qdisc_skb_cb *)skb->cb;
	235	}
	236
83874000 DM	237	static inline spinlock_t qdisc_lock(struct Qdisc qdisc)
	238	{
	239	return &qdisc->q.lock;
	240	}
	241
7698b4fc DM	242	static inline struct Qdisc qdisc_root(struct Qdisc qdisc)
	243	{
	244	return qdisc->dev_queue->qdisc;
	245	}
	246
2540e051 JP	247	static inline struct Qdisc qdisc_root_sleeping(struct Qdisc qdisc)
	248	{
	249	return qdisc->dev_queue->qdisc_sleeping;
	250	}
	251
7e43f112 DM	252	/* The qdisc root lock is a mechanism by which to top level
	253	* of a qdisc tree can be locked from any qdisc node in the
	254	* forest. This allows changing the configuration of some
	255	* aspect of the qdisc tree while blocking out asynchronous
	256	* qdisc access in the packet processing paths.
	257	*
	258	* It is only legal to do this when the root will not change
	259	* on us. Otherwise we'll potentially lock the wrong qdisc
	260	* root. This is enforced by holding the RTNL semaphore, which
	261	* all users of this lock accessor must do.
	262	*/
7698b4fc DM	263	static inline spinlock_t qdisc_root_lock(struct Qdisc qdisc)
	264	{
	265	struct Qdisc *root = qdisc_root(qdisc);
	266
7e43f112	267	ASSERT_RTNL();
83874000	268	return qdisc_lock(root);
7698b4fc DM	269	}
7698b4fc DM	270
f6f9b93f JP	271	static inline spinlock_t qdisc_root_sleeping_lock(struct Qdisc qdisc)
	272	{
	273	struct Qdisc *root = qdisc_root_sleeping(qdisc);
	274
	275	ASSERT_RTNL();
	276	return qdisc_lock(root);
	277	}
	278
5ce2d488 DM	279	static inline struct net_device qdisc_dev(struct Qdisc qdisc)
	280	{
	281	return qdisc->dev_queue->dev;
	282	}
1da177e4	283
78a5b30b DM	284	static inline void sch_tree_lock(struct Qdisc *q)
78a5b30b DM	285	{
fe439dd0	286	spin_lock_bh(qdisc_root_sleeping_lock(q));
78a5b30b DM	287	}
	288
	289	static inline void sch_tree_unlock(struct Qdisc *q)
	290	{
fe439dd0	291	spin_unlock_bh(qdisc_root_sleeping_lock(q));
78a5b30b DM	292	}
	293
	294	#define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
	295	#define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
1da177e4	296
e41a33e6 TG	297	extern struct Qdisc noop_qdisc;
e41a33e6 TG	298	extern struct Qdisc_ops noop_qdisc_ops;
6ec1c69a DM	299	extern struct Qdisc_ops pfifo_fast_ops;
6ec1c69a DM	300	extern struct Qdisc_ops mq_qdisc_ops;
e41a33e6	301
fd2c3ef7	302	struct Qdisc_class_common {
6fe1c7a5 PM	303	u32 classid;
	304	struct hlist_node hnode;
	305	};
	306
fd2c3ef7	307	struct Qdisc_class_hash {
6fe1c7a5 PM	308	struct hlist_head *hash;
	309	unsigned int hashsize;
	310	unsigned int hashmask;
	311	unsigned int hashelems;
	312	};
	313
	314	static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
	315	{
	316	id ^= id >> 8;
	317	id ^= id >> 4;
	318	return id & mask;
	319	}
	320
	321	static inline struct Qdisc_class_common *
	322	qdisc_class_find(struct Qdisc_class_hash *hash, u32 id)
	323	{
	324	struct Qdisc_class_common *cl;
	325	struct hlist_node *n;
	326	unsigned int h;
	327
	328	h = qdisc_class_hash(id, hash->hashmask);
	329	hlist_for_each_entry(cl, n, &hash->hash[h], hnode) {
	330	if (cl->classid == id)
	331	return cl;
	332	}
	333	return NULL;
	334	}
	335
	336	extern int qdisc_class_hash_init(struct Qdisc_class_hash *);
	337	extern void qdisc_class_hash_insert(struct Qdisc_class_hash , struct Qdisc_class_common );
	338	extern void qdisc_class_hash_remove(struct Qdisc_class_hash , struct Qdisc_class_common );
	339	extern void qdisc_class_hash_grow(struct Qdisc , struct Qdisc_class_hash );
	340	extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
	341
e41a33e6 TG	342	extern void dev_init_scheduler(struct net_device *dev);
	343	extern void dev_shutdown(struct net_device *dev);
	344	extern void dev_activate(struct net_device *dev);
	345	extern void dev_deactivate(struct net_device *dev);
44345724	346	extern void dev_deactivate_many(struct list_head *head);
589983cd PM	347	extern struct Qdisc dev_graft_qdisc(struct netdev_queue dev_queue,
589983cd PM	348	struct Qdisc *qdisc);
e41a33e6 TG	349	extern void qdisc_reset(struct Qdisc *qdisc);
e41a33e6 TG	350	extern void qdisc_destroy(struct Qdisc *qdisc);
43effa1e	351	extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n);
5ce2d488	352	extern struct Qdisc qdisc_alloc(struct netdev_queue dev_queue,
bb949fbd	353	struct Qdisc_ops *ops);
3511c913	354	extern struct Qdisc qdisc_create_dflt(struct netdev_queue dev_queue,
9f9afec4	355	struct Qdisc_ops *ops, u32 parentid);
a2da570d ED	356	extern void __qdisc_calculate_pkt_len(struct sk_buff *skb,
a2da570d ED	357	const struct qdisc_size_table *stab);
a48b5a61	358	extern void tcf_destroy(struct tcf_proto *tp);
ff31ab56	359	extern void tcf_destroy_chain(struct tcf_proto **fl);
1da177e4	360
f0796d5c JF	361	/* Reset all TX qdiscs greater then index of a device. */
f0796d5c JF	362	static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i)
5aa70995	363	{
4ef6acff JF	364	struct Qdisc *qdisc;
4ef6acff JF	365
f0796d5c	366	for (; i < dev->num_tx_queues; i++) {
4ef6acff JF	367	qdisc = netdev_get_tx_queue(dev, i)->qdisc;
	368	if (qdisc) {
	369	spin_lock_bh(qdisc_lock(qdisc));
	370	qdisc_reset(qdisc);
	371	spin_unlock_bh(qdisc_lock(qdisc));
	372	}
	373	}
5aa70995 DM	374	}
5aa70995 DM	375
5aa70995 DM	376	static inline void qdisc_reset_all_tx(struct net_device *dev)
5aa70995 DM	377	{
f0796d5c	378	qdisc_reset_all_tx_gt(dev, 0);
5aa70995 DM	379	}
5aa70995 DM	380
3e745dd6 DM	381	/* Are all TX queues of the device empty? */
	382	static inline bool qdisc_all_tx_empty(const struct net_device *dev)
	383	{
e8a0464c DM	384	unsigned int i;
	385	for (i = 0; i < dev->num_tx_queues; i++) {
	386	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	387	const struct Qdisc *q = txq->qdisc;
3e745dd6	388
e8a0464c DM	389	if (q->q.qlen)
	390	return false;
	391	}
	392	return true;
3e745dd6 DM	393	}
3e745dd6 DM	394
6fa9864b DM	395	/* Are any of the TX qdiscs changing? */
	396	static inline bool qdisc_tx_changing(struct net_device *dev)
	397	{
e8a0464c DM	398	unsigned int i;
	399	for (i = 0; i < dev->num_tx_queues; i++) {
	400	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	401	if (txq->qdisc != txq->qdisc_sleeping)
	402	return true;
	403	}
	404	return false;
6fa9864b DM	405	}
6fa9864b DM	406
e8a0464c	407	/* Is the device using the noop qdisc on all queues? */
05297949 DM	408	static inline bool qdisc_tx_is_noop(const struct net_device *dev)
05297949 DM	409	{
e8a0464c DM	410	unsigned int i;
	411	for (i = 0; i < dev->num_tx_queues; i++) {
	412	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
	413	if (txq->qdisc != &noop_qdisc)
	414	return false;
	415	}
	416	return true;
05297949 DM	417	}
05297949 DM	418
bfe0d029	419	static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb)
0abf77e5	420	{
175f9c1b	421	return qdisc_skb_cb(skb)->pkt_len;
0abf77e5 JK	422	}
0abf77e5 JK	423
c27f339a	424	/* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */
378a2f09 JP	425	enum net_xmit_qdisc_t {
378a2f09 JP	426	__NET_XMIT_STOLEN = 0x00010000,
c27f339a	427	__NET_XMIT_BYPASS = 0x00020000,
378a2f09 JP	428	};
378a2f09 JP	429
c27f339a	430	#ifdef CONFIG_NET_CLS_ACT
378a2f09	431	#define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
378a2f09 JP	432	#else
	433	#define net_xmit_drop_count(e) (1)
	434	#endif
	435
a2da570d ED	436	static inline void qdisc_calculate_pkt_len(struct sk_buff *skb,
a2da570d ED	437	const struct Qdisc *sch)
5f86173b	438	{
3a682fbd	439	#ifdef CONFIG_NET_SCHED
a2da570d ED	440	struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab);
	441
	442	if (stab)
	443	__qdisc_calculate_pkt_len(skb, stab);
3a682fbd	444	#endif
a2da570d ED	445	}
	446
	447	static inline int qdisc_enqueue(struct sk_buff skb, struct Qdisc sch)
	448	{
	449	qdisc_calculate_pkt_len(skb, sch);
5f86173b JK	450	return sch->enqueue(skb, sch);
	451	}
	452
	453	static inline int qdisc_enqueue_root(struct sk_buff skb, struct Qdisc sch)
	454	{
175f9c1b	455	qdisc_skb_cb(skb)->pkt_len = skb->len;
378a2f09	456	return qdisc_enqueue(skb, sch) & NET_XMIT_MASK;
5f86173b JK	457	}
5f86173b JK	458
bfe0d029 ED	459
	460	static inline void bstats_update(struct gnet_stats_basic_packed *bstats,
	461	const struct sk_buff *skb)
	462	{
	463	bstats->bytes += qdisc_pkt_len(skb);
	464	bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
	465	}
	466
	467	static inline void qdisc_bstats_update(struct Qdisc *sch,
	468	const struct sk_buff *skb)
bbd8a0d3	469	{
bfe0d029	470	bstats_update(&sch->bstats, skb);
bbd8a0d3 KK	471	}
bbd8a0d3 KK	472
9972b25d TG	473	static inline int __qdisc_enqueue_tail(struct sk_buff skb, struct Qdisc sch,
	474	struct sk_buff_head *list)
	475	{
	476	__skb_queue_tail(list, skb);
0abf77e5	477	sch->qstats.backlog += qdisc_pkt_len(skb);
9972b25d TG	478
	479	return NET_XMIT_SUCCESS;
	480	}
	481
	482	static inline int qdisc_enqueue_tail(struct sk_buff skb, struct Qdisc sch)
	483	{
	484	return __qdisc_enqueue_tail(skb, sch, &sch->q);
	485	}
	486
	487	static inline struct sk_buff __qdisc_dequeue_head(struct Qdisc sch,
	488	struct sk_buff_head *list)
	489	{
	490	struct sk_buff *skb = __skb_dequeue(list);
	491
9190b3b3	492	if (likely(skb != NULL)) {
0abf77e5	493	sch->qstats.backlog -= qdisc_pkt_len(skb);
9190b3b3 ED	494	qdisc_bstats_update(sch, skb);
9190b3b3 ED	495	}
9972b25d TG	496
	497	return skb;
	498	}
	499
	500	static inline struct sk_buff qdisc_dequeue_head(struct Qdisc sch)
	501	{
	502	return __qdisc_dequeue_head(sch, &sch->q);
57dbb2d8 HPP	503	}
	504
	505	static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch,
	506	struct sk_buff_head *list)
	507	{
9190b3b3	508	struct sk_buff *skb = __skb_dequeue(list);
57dbb2d8 HPP	509
	510	if (likely(skb != NULL)) {
	511	unsigned int len = qdisc_pkt_len(skb);
9190b3b3	512	sch->qstats.backlog -= len;
57dbb2d8 HPP	513	kfree_skb(skb);
	514	return len;
	515	}
	516
	517	return 0;
	518	}
	519
	520	static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch)
	521	{
	522	return __qdisc_queue_drop_head(sch, &sch->q);
9972b25d TG	523	}
	524
	525	static inline struct sk_buff __qdisc_dequeue_tail(struct Qdisc sch,
	526	struct sk_buff_head *list)
	527	{
	528	struct sk_buff *skb = __skb_dequeue_tail(list);
	529
	530	if (likely(skb != NULL))
0abf77e5	531	sch->qstats.backlog -= qdisc_pkt_len(skb);
9972b25d TG	532
	533	return skb;
	534	}
	535
	536	static inline struct sk_buff qdisc_dequeue_tail(struct Qdisc sch)
	537	{
	538	return __qdisc_dequeue_tail(sch, &sch->q);
	539	}
	540
48a8f519 PM	541	static inline struct sk_buff qdisc_peek_head(struct Qdisc sch)
	542	{
	543	return skb_peek(&sch->q);
	544	}
	545
77be155c JP	546	/* generic pseudo peek method for non-work-conserving qdisc */
	547	static inline struct sk_buff qdisc_peek_dequeued(struct Qdisc sch)
	548	{
	549	/* we can reuse ->gso_skb because peek isn't called for root qdiscs */
61c9eaf9	550	if (!sch->gso_skb) {
77be155c	551	sch->gso_skb = sch->dequeue(sch);
61c9eaf9 JP	552	if (sch->gso_skb)
	553	/* it's still part of the queue */
	554	sch->q.qlen++;
	555	}
77be155c JP	556
	557	return sch->gso_skb;
	558	}
	559
	560	/* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */
	561	static inline struct sk_buff qdisc_dequeue_peeked(struct Qdisc sch)
	562	{
	563	struct sk_buff *skb = sch->gso_skb;
	564
61c9eaf9	565	if (skb) {
77be155c	566	sch->gso_skb = NULL;
61c9eaf9 JP	567	sch->q.qlen--;
61c9eaf9 JP	568	} else {
77be155c	569	skb = sch->dequeue(sch);
61c9eaf9	570	}
77be155c JP	571
	572	return skb;
	573	}
	574
9972b25d TG	575	static inline void __qdisc_reset_queue(struct Qdisc *sch,
	576	struct sk_buff_head *list)
	577	{
	578	/*
	579	* We do not know the backlog in bytes of this list, it
	580	* is up to the caller to correct it
	581	*/
93245dd6	582	__skb_queue_purge(list);
9972b25d TG	583	}
	584
	585	static inline void qdisc_reset_queue(struct Qdisc *sch)
	586	{
	587	__qdisc_reset_queue(sch, &sch->q);
	588	sch->qstats.backlog = 0;
	589	}
	590
	591	static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
	592	struct sk_buff_head *list)
	593	{
	594	struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
	595
	596	if (likely(skb != NULL)) {
0abf77e5	597	unsigned int len = qdisc_pkt_len(skb);
9972b25d TG	598	kfree_skb(skb);
	599	return len;
	600	}
	601
	602	return 0;
	603	}
	604
	605	static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
	606	{
	607	return __qdisc_queue_drop(sch, &sch->q);
	608	}
	609
	610	static inline int qdisc_drop(struct sk_buff skb, struct Qdisc sch)
	611	{
	612	kfree_skb(skb);
	613	sch->qstats.drops++;
	614
	615	return NET_XMIT_DROP;
	616	}
	617
	618	static inline int qdisc_reshape_fail(struct sk_buff skb, struct Qdisc sch)
	619	{
	620	sch->qstats.drops++;
	621
c3bc7cff	622	#ifdef CONFIG_NET_CLS_ACT
9972b25d TG	623	if (sch->reshape_fail == NULL \|\| sch->reshape_fail(skb, sch))
	624	goto drop;
	625
	626	return NET_XMIT_SUCCESS;
	627
	628	drop:
	629	#endif
	630	kfree_skb(skb);
	631	return NET_XMIT_DROP;
	632	}
	633
e9bef55d JDB	634	/* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
	635	long it will take to send a packet given its size.
	636	*/
	637	static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
	638	{
e08b0998 JDB	639	int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
	640	if (slot < 0)
	641	slot = 0;
e9bef55d JDB	642	slot >>= rtab->rate.cell_log;
e9bef55d JDB	643	if (slot > 255)
a02cec21	644	return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF];
e9bef55d JDB	645	return rtab->data[slot];
	646	}
	647
12da81d1	648	#ifdef CONFIG_NET_CLS_ACT
210d6de7 CG	649	static inline struct sk_buff skb_act_clone(struct sk_buff skb, gfp_t gfp_mask,
210d6de7 CG	650	int action)
12da81d1	651	{
210d6de7 CG	652	struct sk_buff *n;
210d6de7 CG	653
17302107	654	n = skb_clone(skb, gfp_mask);
12da81d1 JHS	655
	656	if (n) {
	657	n->tc_verd = SET_TC_VERD(n->tc_verd, 0);
	658	n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd);
	659	n->tc_verd = CLR_TC_MUNGED(n->tc_verd);
12da81d1 JHS	660	}
	661	return n;
	662	}
	663	#endif
	664
1da177e4	665	#endif