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Date: Fri, 16 Mar 2007 06:30:51 +0100 (MET) From: Patrick McHardy <kaber@...sh.net> To: davem@...emloft.net Cc: devik@....cz, netdev@...r.kernel.org, Patrick McHardy <kaber@...sh.net>, shemminger@...ux-foundation.org Subject: [NET_SCHED 02/10]: Add hrtimer based qdisc watchdog [NET_SCHED]: Add hrtimer based qdisc watchdog Signed-off-by: Patrick McHardy <kaber@...sh.net> --- commit 4d0baa5c06cb04a53d8c68ecc10f38a295f08d14 tree 08da6754c9cc015a3118c452649d9fb6425dd903 parent e400fa6d9e7c13d675b96958a967e747148e9b70 author Patrick McHardy <kaber@...sh.net> Fri, 16 Mar 2007 06:06:26 +0100 committer Patrick McHardy <kaber@...sh.net> Fri, 16 Mar 2007 06:06:26 +0100 include/net/pkt_sched.h | 10 ++++++++++ net/sched/sch_api.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+), 0 deletions(-) diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h index 1c12afd..b090d55 100644 --- a/include/net/pkt_sched.h +++ b/include/net/pkt_sched.h @@ -64,6 +64,16 @@ #define PSCHED_SET_PASTPERFECT(t) ((t) = #define PSCHED_IS_PASTPERFECT(t) ((t) == 0) #define PSCHED_AUDIT_TDIFF(t) +struct qdisc_watchdog { + struct hrtimer timer; + struct Qdisc *qdisc; +}; + +extern void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc); +extern void qdisc_watchdog_schedule(struct qdisc_watchdog *wd, + psched_time_t expires); +extern void qdisc_watchdog_cancel(struct qdisc_watchdog *wd); + extern struct Qdisc_ops pfifo_qdisc_ops; extern struct Qdisc_ops bfifo_qdisc_ops; diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index d71bf79..6bc395c 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -34,6 +34,7 @@ #include <linux/seq_file.h> #include <linux/kmod.h> #include <linux/list.h> #include <linux/bitops.h> +#include <linux/hrtimer.h> #include <net/sock.h> #include <net/pkt_sched.h> @@ -291,6 +292,41 @@ void qdisc_put_rtab(struct qdisc_rate_ta } } +static enum hrtimer_restart qdisc_watchdog(struct hrtimer *timer) +{ + struct qdisc_watchdog *wd = container_of(timer, struct qdisc_watchdog, + timer); + + wd->qdisc->flags &= ~TCQ_F_THROTTLED; + netif_schedule(wd->qdisc->dev); + return HRTIMER_NORESTART; +} + +void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc) +{ + hrtimer_init(&wd->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + wd->timer.function = qdisc_watchdog; + wd->qdisc = qdisc; +} +EXPORT_SYMBOL(qdisc_watchdog_init); + +void qdisc_watchdog_schedule(struct qdisc_watchdog *wd, psched_time_t expires) +{ + ktime_t time; + + wd->qdisc->flags |= TCQ_F_THROTTLED; + time = ktime_set(0, 0); + time = ktime_add_ns(time, PSCHED_US2NS(expires)); + hrtimer_start(&wd->timer, time, HRTIMER_MODE_ABS); +} +EXPORT_SYMBOL(qdisc_watchdog_schedule); + +void qdisc_watchdog_cancel(struct qdisc_watchdog *wd) +{ + hrtimer_cancel(&wd->timer); + wd->qdisc->flags &= ~TCQ_F_THROTTLED; +} +EXPORT_SYMBOL(qdisc_watchdog_cancel); /* Allocate an unique handle from space managed by kernel */ - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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