From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/include/net/pkt_sched.h | 137 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 137 insertions(+) create mode 100644 kernel/include/net/pkt_sched.h (limited to 'kernel/include/net/pkt_sched.h') diff --git a/kernel/include/net/pkt_sched.h b/kernel/include/net/pkt_sched.h new file mode 100644 index 000000000..2342bf12c --- /dev/null +++ b/kernel/include/net/pkt_sched.h @@ -0,0 +1,137 @@ +#ifndef __NET_PKT_SCHED_H +#define __NET_PKT_SCHED_H + +#include +#include +#include +#include + +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_compat(struct sk_buff *skb, const struct tcf_proto *tp, + struct tcf_result *res); +int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp, + struct tcf_result *res); + +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 -- cgit 1.2.3-korg