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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
23/*
24 Timer resolution MUST BE < 10% of min_schedulable_packet_size/bandwidth
25
26 Normal IP packet size ~ 512byte, hence:
27
28 0.5Kbyte/1Mbyte/sec = 0.5msec, so that we need 50usec timer for
29 10Mbit ethernet.
30
31 10msec resolution -> <50Kbit/sec.
32
33 The result: [34]86 is not good choice for QoS router :-(
34
35 The things are not so bad, because we may use artificial
36 clock evaluated by integration of network data flow
37 in the most critical places.
38 */
39
40typedef u64 psched_time_t;
41typedef long psched_tdiff_t;
42
43/* Avoid doing 64 bit divide */
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(struct qdisc_watchdog *wd,
69 psched_time_t expires);
70extern void qdisc_watchdog_cancel(struct qdisc_watchdog *wd);
71
72extern struct Qdisc_ops pfifo_qdisc_ops;
73extern struct Qdisc_ops bfifo_qdisc_ops;
74extern struct Qdisc_ops pfifo_head_drop_qdisc_ops;
75
76extern int fifo_set_limit(struct Qdisc *q, unsigned int limit);
77extern struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops,
78 unsigned int limit);
79
80extern int register_qdisc(struct Qdisc_ops *qops);
81extern int unregister_qdisc(struct Qdisc_ops *qops);
82extern void qdisc_list_del(struct Qdisc *q);
83extern struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle);
84extern struct Qdisc *qdisc_lookup_class(struct net_device *dev, u32 handle);
85extern struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r,
86 struct nlattr *tab);
87extern void qdisc_put_rtab(struct qdisc_rate_table *tab);
88extern void qdisc_put_stab(struct qdisc_size_table *tab);
89extern void qdisc_warn_nonwc(char *txt, struct Qdisc *qdisc);
90extern int sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q,
91 struct net_device *dev, struct netdev_queue *txq,
92 spinlock_t *root_lock);
93
94extern void __qdisc_run(struct Qdisc *q);
95
96static inline void qdisc_run(struct Qdisc *q)
97{
98 if (qdisc_run_begin(q))
99 __qdisc_run(q);
100}
101
102extern int tc_classify_compat(struct sk_buff *skb, const struct tcf_proto *tp,
103 struct tcf_result *res);
104extern int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
105 struct tcf_result *res);
106
107/* Calculate maximal size of packet seen by hard_start_xmit
108 routine of this device.
109 */
110static inline unsigned psched_mtu(const struct net_device *dev)
111{
112 return dev->mtu + dev->hard_header_len;
113}
114
115#endif
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
23/*
24 Timer resolution MUST BE < 10% of min_schedulable_packet_size/bandwidth
25
26 Normal IP packet size ~ 512byte, hence:
27
28 0.5Kbyte/1Mbyte/sec = 0.5msec, so that we need 50usec timer for
29 10Mbit ethernet.
30
31 10msec resolution -> <50Kbit/sec.
32
33 The result: [34]86 is not good choice for QoS router :-(
34
35 The things are not so bad, because we may use artificial
36 clock evaluated by integration of network data flow
37 in the most critical places.
38 */
39
40typedef u64 psched_time_t;
41typedef long psched_tdiff_t;
42
43/* Avoid doing 64 bit divide */
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(struct qdisc_watchdog *wd,
69 psched_time_t expires);
70extern void qdisc_watchdog_cancel(struct qdisc_watchdog *wd);
71
72extern struct Qdisc_ops pfifo_qdisc_ops;
73extern struct Qdisc_ops bfifo_qdisc_ops;
74extern struct Qdisc_ops pfifo_head_drop_qdisc_ops;
75
76extern int fifo_set_limit(struct Qdisc *q, unsigned int limit);
77extern struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops,
78 unsigned int limit);
79
80extern int register_qdisc(struct Qdisc_ops *qops);
81extern int unregister_qdisc(struct Qdisc_ops *qops);
82extern void qdisc_list_del(struct Qdisc *q);
83extern struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle);
84extern struct Qdisc *qdisc_lookup_class(struct net_device *dev, u32 handle);
85extern struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r,
86 struct nlattr *tab);
87extern void qdisc_put_rtab(struct qdisc_rate_table *tab);
88extern void qdisc_put_stab(struct qdisc_size_table *tab);
89extern void qdisc_warn_nonwc(char *txt, struct Qdisc *qdisc);
90extern int sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q,
91 struct net_device *dev, struct netdev_queue *txq,
92 spinlock_t *root_lock);
93
94extern void __qdisc_run(struct Qdisc *q);
95
96static inline void qdisc_run(struct Qdisc *q)
97{
98 if (qdisc_run_begin(q))
99 __qdisc_run(q);
100}
101
102extern int tc_classify_compat(struct sk_buff *skb, const struct tcf_proto *tp,
103 struct tcf_result *res);
104extern int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
105 struct tcf_result *res);
106
107/* Calculate maximal size of packet seen by hard_start_xmit
108 routine of this device.
109 */
110static inline unsigned int psched_mtu(const struct net_device *dev)
111{
112 return dev->mtu + dev->hard_header_len;
113}
114
115#endif