#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/rtnetlink.h> #include <linux/pkt_sched.h> #include <linux/pkt_cls.h> #include <net/gen_stats.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; }; struct Qdisc { int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev); struct sk_buff * (*dequeue)(struct Qdisc *dev); unsigned flags; #define TCQ_F_BUILTIN 1 #define TCQ_F_THROTTLED 2 #define TCQ_F_INGRESS 4 int padded; struct Qdisc_ops *ops; u32 handle; u32 parent; atomic_t refcnt; struct sk_buff_head q; struct net_device *dev; struct list_head list; struct gnet_stats_basic bstats; struct gnet_stats_queue qstats; struct gnet_stats_rate_est rate_est; spinlock_t *stats_lock; struct rcu_head q_rcu; int (*reshape_fail)(struct sk_buff *skb, struct Qdisc *q); /* This field is deprecated, but it is still used by CBQ * and it will live until better solution will be invented. */ struct Qdisc *__parent; }; struct Qdisc_class_ops { /* Child qdisc manipulation */ int (*graft)(struct Qdisc *, unsigned long cl, struct Qdisc *, struct Qdisc **); struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); void (*qlen_notify)(struct Qdisc *, unsigned long); /* Class manipulation routines */ unsigned long (*get)(struct Qdisc *, u32 classid); void (*put)(struct Qdisc *, unsigned long); int (*change)(struct Qdisc *, u32, u32, struct rtattr **, 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; struct Qdisc_class_ops *cl_ops; char id[IFNAMSIZ]; int priv_size; int (*enqueue)(struct sk_buff *, struct Qdisc *); struct sk_buff * (*dequeue)(struct Qdisc *); int (*requeue)(struct sk_buff *, struct Qdisc *); unsigned int (*drop)(struct Qdisc *); int (*init)(struct Qdisc *, struct rtattr *arg); void (*reset)(struct Qdisc *); void (*destroy)(struct Qdisc *); int (*change)(struct Qdisc *, struct rtattr *arg); int (*dump)(struct Qdisc *, struct sk_buff *); int (*dump_stats)(struct Qdisc *, struct gnet_dump *); struct module *owner; }; struct tcf_result { unsigned long class; u32 classid; }; struct tcf_proto_ops { struct tcf_proto_ops *next; char kind[IFNAMSIZ]; int (*classify)(struct sk_buff*, struct tcf_proto*, struct tcf_result *); int (*init)(struct tcf_proto*); void (*destroy)(struct tcf_proto*); unsigned long (*get)(struct tcf_proto*, u32 handle); void (*put)(struct tcf_proto*, unsigned long); int (*change)(struct tcf_proto*, unsigned long, u32 handle, struct rtattr **, unsigned long *); int (*delete)(struct tcf_proto*, unsigned long); void (*walk)(struct tcf_proto*, struct tcf_walker *arg); /* rtnetlink specific */ int (*dump)(struct tcf_proto*, unsigned long, struct sk_buff *skb, struct tcmsg*); struct module *owner; }; struct tcf_proto { /* Fast access part */ struct tcf_proto *next; void *root; int (*classify)(struct sk_buff*, struct tcf_proto*, struct tcf_result *); __be16 protocol; /* All the rest */ u32 prio; u32 classid; struct Qdisc *q; void *data; struct tcf_proto_ops *ops; }; extern void qdisc_lock_tree(struct net_device *dev); extern void qdisc_unlock_tree(struct net_device *dev); #define sch_tree_lock(q) qdisc_lock_tree((q)->dev) #define sch_tree_unlock(q) qdisc_unlock_tree((q)->dev) #define tcf_tree_lock(tp) qdisc_lock_tree((tp)->q->dev) #define tcf_tree_unlock(tp) qdisc_unlock_tree((tp)->q->dev) extern struct Qdisc noop_qdisc; extern struct Qdisc_ops noop_qdisc_ops; extern void dev_init_scheduler(struct net_device *dev); extern void dev_shutdown(struct net_device *dev); extern void dev_activate(struct net_device *dev); extern void dev_deactivate(struct net_device *dev); extern void qdisc_reset(struct Qdisc *qdisc); extern void qdisc_destroy(struct Qdisc *qdisc); extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); extern struct Qdisc *qdisc_alloc(struct net_device *dev, struct Qdisc_ops *ops); extern struct Qdisc *qdisc_create_dflt(struct net_device *dev, struct Qdisc_ops *ops, u32 parentid); static inline void tcf_destroy(struct tcf_proto *tp) { tp->ops->destroy(tp); module_put(tp->ops->owner); kfree(tp); } static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, struct sk_buff_head *list) { __skb_queue_tail(list, skb); sch->qstats.backlog += skb->len; sch->bstats.bytes += skb->len; sch->bstats.packets++; return NET_XMIT_SUCCESS; } static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) { return __qdisc_enqueue_tail(skb, sch, &sch->q); } static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, struct sk_buff_head *list) { struct sk_buff *skb = __skb_dequeue(list); if (likely(skb != NULL)) sch->qstats.backlog -= skb->len; return skb; } static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) { return __qdisc_dequeue_head(sch, &sch->q); } static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, struct sk_buff_head *list) { struct sk_buff *skb = __skb_dequeue_tail(list); if (likely(skb != NULL)) sch->qstats.backlog -= skb->len; return skb; } static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) { return __qdisc_dequeue_tail(sch, &sch->q); } static inline int __qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch, struct sk_buff_head *list) { __skb_queue_head(list, skb); sch->qstats.backlog += skb->len; sch->qstats.requeues++; return NET_XMIT_SUCCESS; } static inline int qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch) { return __qdisc_requeue(skb, sch, &sch->q); } static inline void __qdisc_reset_queue(struct Qdisc *sch, struct sk_buff_head *list) { /* * We do not know the backlog in bytes of this list, it * is up to the caller to correct it */ skb_queue_purge(list); } static inline void qdisc_reset_queue(struct Qdisc *sch) { __qdisc_reset_queue(sch, &sch->q); sch->qstats.backlog = 0; } static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, struct sk_buff_head *list) { struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); if (likely(skb != NULL)) { unsigned int len = skb->len; kfree_skb(skb); return len; } return 0; } static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) { return __qdisc_queue_drop(sch, &sch->q); } static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) { kfree_skb(skb); sch->qstats.drops++; return NET_XMIT_DROP; } static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) { sch->qstats.drops++; #ifdef CONFIG_NET_CLS_POLICE 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; } #endif