mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
3b3ae88026
For classifiers getting invoked via tc_classify(), we always need an extra function call into tc_classify_compat(), as both are being exported as symbols and tc_classify() itself doesn't do much except handling of reclassifications when tp->classify() returned with TC_ACT_RECLASSIFY. CBQ and ATM are the only qdiscs that directly call into tc_classify_compat(), all others use tc_classify(). When tc actions are being configured out in the kernel, tc_classify() effectively does nothing besides delegating. We could spare this layer and consolidate both functions. pktgen on single CPU constantly pushing skbs directly into the netif_receive_skb() path with a dummy classifier on ingress qdisc attached, improves slightly from 22.3Mpps to 23.1Mpps. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
136 lines
3.8 KiB
C
136 lines
3.8 KiB
C
#ifndef __NET_PKT_SCHED_H
|
|
#define __NET_PKT_SCHED_H
|
|
|
|
#include <linux/jiffies.h>
|
|
#include <linux/ktime.h>
|
|
#include <linux/if_vlan.h>
|
|
#include <net/sch_generic.h>
|
|
|
|
struct qdisc_walker {
|
|
int stop;
|
|
int skip;
|
|
int count;
|
|
int (*fn)(struct Qdisc *, unsigned long cl, struct qdisc_walker *);
|
|
};
|
|
|
|
#define QDISC_ALIGNTO 64
|
|
#define QDISC_ALIGN(len) (((len) + QDISC_ALIGNTO-1) & ~(QDISC_ALIGNTO-1))
|
|
|
|
static inline void *qdisc_priv(struct Qdisc *q)
|
|
{
|
|
return (char *) q + QDISC_ALIGN(sizeof(struct Qdisc));
|
|
}
|
|
|
|
/*
|
|
Timer resolution MUST BE < 10% of min_schedulable_packet_size/bandwidth
|
|
|
|
Normal IP packet size ~ 512byte, hence:
|
|
|
|
0.5Kbyte/1Mbyte/sec = 0.5msec, so that we need 50usec timer for
|
|
10Mbit ethernet.
|
|
|
|
10msec resolution -> <50Kbit/sec.
|
|
|
|
The result: [34]86 is not good choice for QoS router :-(
|
|
|
|
The things are not so bad, because we may use artificial
|
|
clock evaluated by integration of network data flow
|
|
in the most critical places.
|
|
*/
|
|
|
|
typedef u64 psched_time_t;
|
|
typedef long psched_tdiff_t;
|
|
|
|
/* Avoid doing 64 bit divide */
|
|
#define PSCHED_SHIFT 6
|
|
#define PSCHED_TICKS2NS(x) ((s64)(x) << PSCHED_SHIFT)
|
|
#define PSCHED_NS2TICKS(x) ((x) >> PSCHED_SHIFT)
|
|
|
|
#define PSCHED_TICKS_PER_SEC PSCHED_NS2TICKS(NSEC_PER_SEC)
|
|
#define PSCHED_PASTPERFECT 0
|
|
|
|
static inline psched_time_t psched_get_time(void)
|
|
{
|
|
return PSCHED_NS2TICKS(ktime_get_ns());
|
|
}
|
|
|
|
static inline psched_tdiff_t
|
|
psched_tdiff_bounded(psched_time_t tv1, psched_time_t tv2, psched_time_t bound)
|
|
{
|
|
return min(tv1 - tv2, bound);
|
|
}
|
|
|
|
struct qdisc_watchdog {
|
|
struct hrtimer timer;
|
|
struct Qdisc *qdisc;
|
|
};
|
|
|
|
void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc);
|
|
void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, u64 expires, bool throttle);
|
|
|
|
static inline void qdisc_watchdog_schedule(struct qdisc_watchdog *wd,
|
|
psched_time_t expires)
|
|
{
|
|
qdisc_watchdog_schedule_ns(wd, PSCHED_TICKS2NS(expires), true);
|
|
}
|
|
|
|
void qdisc_watchdog_cancel(struct qdisc_watchdog *wd);
|
|
|
|
extern struct Qdisc_ops pfifo_qdisc_ops;
|
|
extern struct Qdisc_ops bfifo_qdisc_ops;
|
|
extern struct Qdisc_ops pfifo_head_drop_qdisc_ops;
|
|
|
|
int fifo_set_limit(struct Qdisc *q, unsigned int limit);
|
|
struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops,
|
|
unsigned int limit);
|
|
|
|
int register_qdisc(struct Qdisc_ops *qops);
|
|
int unregister_qdisc(struct Qdisc_ops *qops);
|
|
void qdisc_get_default(char *id, size_t len);
|
|
int qdisc_set_default(const char *id);
|
|
|
|
void qdisc_list_add(struct Qdisc *q);
|
|
void qdisc_list_del(struct Qdisc *q);
|
|
struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle);
|
|
struct Qdisc *qdisc_lookup_class(struct net_device *dev, u32 handle);
|
|
struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r,
|
|
struct nlattr *tab);
|
|
void qdisc_put_rtab(struct qdisc_rate_table *tab);
|
|
void qdisc_put_stab(struct qdisc_size_table *tab);
|
|
void qdisc_warn_nonwc(const char *txt, struct Qdisc *qdisc);
|
|
int sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q,
|
|
struct net_device *dev, struct netdev_queue *txq,
|
|
spinlock_t *root_lock, bool validate);
|
|
|
|
void __qdisc_run(struct Qdisc *q);
|
|
|
|
static inline void qdisc_run(struct Qdisc *q)
|
|
{
|
|
if (qdisc_run_begin(q))
|
|
__qdisc_run(q);
|
|
}
|
|
|
|
int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
|
|
struct tcf_result *res, bool compat_mode);
|
|
|
|
static inline __be16 tc_skb_protocol(const struct sk_buff *skb)
|
|
{
|
|
/* We need to take extra care in case the skb came via
|
|
* vlan accelerated path. In that case, use skb->vlan_proto
|
|
* as the original vlan header was already stripped.
|
|
*/
|
|
if (skb_vlan_tag_present(skb))
|
|
return skb->vlan_proto;
|
|
return skb->protocol;
|
|
}
|
|
|
|
/* Calculate maximal size of packet seen by hard_start_xmit
|
|
routine of this device.
|
|
*/
|
|
static inline unsigned int psched_mtu(const struct net_device *dev)
|
|
{
|
|
return dev->mtu + dev->hard_header_len;
|
|
}
|
|
|
|
#endif
|