#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_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for * q->dev_queue : It can test * netif_xmit_frozen_or_stopped() before * dequeueing next packet. * Its true for MQ/MQPRIO slaves, or non * multiqueue device. */#define TCQ_F_WARN_NONWC (1 << 16) u32 limit; const struct Qdisc_ops *ops; struct qdisc_size_table __rcu *stab; struct list_head list; u32 handle; u32 parent; 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 gnet_stats_rate_est64 rate_est; 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; int padded; atomic_t refcnt; spinlock_t busylock ____cacheline_aligned_in_smp;}; 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 net *net, struct sk_buff *, 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; u16 slave_dev_queue_mapping; u16 _pad; unsigned char data[20];}; static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz){ struct qdisc_skb_cb *qcb; BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); BUILD_BUG_ON(sizeof(qcb->data) < sz);} 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;extern const struct Qdisc_ops *default_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; unsigned int h; h = qdisc_class_hash(id, hash->hashmask); hlist_for_each_entry(cl, &hash->hash[h], hnode) { if (cl->classid == id) return cl; } return NULL;} int qdisc_class_hash_init(struct Qdisc_class_hash *);void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *);void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *);void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *);void qdisc_class_hash_destroy(struct Qdisc_class_hash *); void dev_init_scheduler(struct net_device *dev);void dev_shutdown(struct net_device *dev);void dev_activate(struct net_device *dev);void dev_deactivate(struct net_device *dev);void dev_deactivate_many(struct list_head *head);struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, struct Qdisc *qdisc);void qdisc_reset(struct Qdisc *qdisc);void qdisc_destroy(struct Qdisc *qdisc);void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n);struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, const struct Qdisc_ops *ops);struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, const struct Qdisc_ops *ops, u32 parentid);void __qdisc_calculate_pkt_len(struct sk_buff *skb, const struct qdisc_size_table *stab);void tcf_destroy(struct tcf_proto *tp);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;}Lines 1–500 of 723. 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#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_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for * q->dev_queue : It can test * netif_xmit_frozen_or_stopped() before * dequeueing next packet. * Its true for MQ/MQPRIO slaves, or non * multiqueue device. */ #define TCQ_F_WARN_NONWC (1 << 16) u32 limit; const struct Qdisc_ops *ops; struct qdisc_size_table __rcu *stab; struct list_head list; u32 handle; u32 parent; 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 gnet_stats_rate_est64 rate_est; 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; int padded; atomic_t refcnt; spinlock_t busylock ____cacheline_aligned_in_smp; }; 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 net *net, struct sk_buff *, 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; u16 slave_dev_queue_mapping; u16 _pad; unsigned char data[20]; }; static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) { struct qdisc_skb_cb *qcb; BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); BUILD_BUG_ON(sizeof(qcb->data) < sz); } 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; extern const struct Qdisc_ops *default_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; unsigned int h; h = qdisc_class_hash(id, hash->hashmask); hlist_for_each_entry(cl, &hash->hash[h], hnode) { if (cl->classid == id) return cl; } return NULL; } int qdisc_class_hash_init(struct Qdisc_class_hash *); void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *); void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *); void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); void qdisc_class_hash_destroy(struct Qdisc_class_hash *); void dev_init_scheduler(struct net_device *dev); void dev_shutdown(struct net_device *dev); void dev_activate(struct net_device *dev); void dev_deactivate(struct net_device *dev); void dev_deactivate_many(struct list_head *head); struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, struct Qdisc *qdisc); void qdisc_reset(struct Qdisc *qdisc); void qdisc_destroy(struct Qdisc *qdisc); void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, const struct Qdisc_ops *ops); struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, const struct Qdisc_ops *ops, u32 parentid); void __qdisc_calculate_pkt_len(struct sk_buff *skb, const struct qdisc_size_table *stab); void tcf_destroy(struct tcf_proto *tp); 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; }