1#ifndef __NET_PKT_SCHED_H
2#define __NET_PKT_SCHED_H
3
4#include <linux/jiffies.h>
5#include <linux/ktime.h>
6#include <net/sch_generic.h>
7
8struct qdisc_walker {
9 int stop;
10 int skip;
11 int count;
12 int (*fn)(struct Qdisc *, unsigned long cl, struct qdisc_walker *);
13};
14
15#define QDISC_ALIGNTO 64
16#define QDISC_ALIGN(len) (((len) + QDISC_ALIGNTO-1) & ~(QDISC_ALIGNTO-1))
17
18static inline void *qdisc_priv(struct Qdisc *q)
19{
20 return (char *) q + QDISC_ALIGN(sizeof(struct Qdisc));
21}
22
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39
40typedef u64 psched_time_t;
41typedef long psched_tdiff_t;
42
43
44#define PSCHED_SHIFT 6
45#define PSCHED_TICKS2NS(x) ((s64)(x) << PSCHED_SHIFT)
46#define PSCHED_NS2TICKS(x) ((x) >> PSCHED_SHIFT)
47
48#define PSCHED_TICKS_PER_SEC PSCHED_NS2TICKS(NSEC_PER_SEC)
49#define PSCHED_PASTPERFECT 0
50
51static inline psched_time_t psched_get_time(void)
52{
53 return PSCHED_NS2TICKS(ktime_to_ns(ktime_get()));
54}
55
56static inline psched_tdiff_t
57psched_tdiff_bounded(psched_time_t tv1, psched_time_t tv2, psched_time_t bound)
58{
59 return min(tv1 - tv2, bound);
60}
61
62struct qdisc_watchdog {
63 struct hrtimer timer;
64 struct Qdisc *qdisc;
65};
66
67extern void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc);
68extern void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, u64 expires);
69
70static inline void qdisc_watchdog_schedule(struct qdisc_watchdog *wd,
71 psched_time_t expires)
72{
73 qdisc_watchdog_schedule_ns(wd, PSCHED_TICKS2NS(expires));
74}
75
76extern void qdisc_watchdog_cancel(struct qdisc_watchdog *wd);
77
78extern struct Qdisc_ops pfifo_qdisc_ops;
79extern struct Qdisc_ops bfifo_qdisc_ops;
80extern struct Qdisc_ops pfifo_head_drop_qdisc_ops;
81
82extern int fifo_set_limit(struct Qdisc *q, unsigned int limit);
83extern struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops,
84 unsigned int limit);
85
86extern int register_qdisc(struct Qdisc_ops *qops);
87extern int unregister_qdisc(struct Qdisc_ops *qops);
88extern void qdisc_list_del(struct Qdisc *q);
89extern struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle);
90extern struct Qdisc *qdisc_lookup_class(struct net_device *dev, u32 handle);
91extern struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r,
92 struct nlattr *tab);
93extern void qdisc_put_rtab(struct qdisc_rate_table *tab);
94extern void qdisc_put_stab(struct qdisc_size_table *tab);
95extern void qdisc_warn_nonwc(char *txt, struct Qdisc *qdisc);
96extern int sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q,
97 struct net_device *dev, struct netdev_queue *txq,
98 spinlock_t *root_lock);
99
100extern void __qdisc_run(struct Qdisc *q);
101
102static inline void qdisc_run(struct Qdisc *q)
103{
104 if (qdisc_run_begin(q))
105 __qdisc_run(q);
106}
107
108extern int tc_classify_compat(struct sk_buff *skb, const struct tcf_proto *tp,
109 struct tcf_result *res);
110extern int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
111 struct tcf_result *res);
112
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114
115
116static inline unsigned int psched_mtu(const struct net_device *dev)
117{
118 return dev->mtu + dev->hard_header_len;
119}
120
121#endif
122