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Message-Id: <20130625182200.705267147@linuxfoundation.org>
Date: Tue, 25 Jun 2013 11:32:50 -0700
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Jesper Dangaard Brouer <brouer@...hat.com>,
Eric Dumazet <edumazet@...gle.com>,
Vimalkumar <j.vimal@...il.com>, Jiri Pirko <jpirko@...hat.com>,
"David S. Miller" <davem@...emloft.net>
Subject: [ 63/95] net_sched: restore "overhead xxx" handling
3.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Dumazet <edumazet@...gle.com>
[ Upstream commit 01cb71d2d47b78354358e4bb938bb06323e17498 ]
commit 56b765b79 ("htb: improved accuracy at high rates")
broke the "overhead xxx" handling, as well as the "linklayer atm"
attribute.
tc class add ... htb rate X ceil Y linklayer atm overhead 10
This patch restores the "overhead xxx" handling, for htb, tbf
and act_police
The "linklayer atm" thing needs a separate fix.
Reported-by: Jesper Dangaard Brouer <brouer@...hat.com>
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Cc: Vimalkumar <j.vimal@...il.com>
Cc: Jiri Pirko <jpirko@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
include/net/sch_generic.h | 18 +++++++++++-------
net/sched/act_police.c | 8 ++++----
net/sched/sch_generic.c | 8 +++++---
net/sched/sch_htb.c | 8 ++++----
net/sched/sch_tbf.c | 8 ++++----
5 files changed, 28 insertions(+), 22 deletions(-)
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -679,22 +679,26 @@ static inline struct sk_buff *skb_act_cl
#endif
struct psched_ratecfg {
- u64 rate_bps;
- u32 mult;
- u32 shift;
+ u64 rate_bps;
+ u32 mult;
+ u16 overhead;
+ u8 shift;
};
static inline u64 psched_l2t_ns(const struct psched_ratecfg *r,
unsigned int len)
{
- return ((u64)len * r->mult) >> r->shift;
+ return ((u64)(len + r->overhead) * r->mult) >> r->shift;
}
-extern void psched_ratecfg_precompute(struct psched_ratecfg *r, u32 rate);
+extern void psched_ratecfg_precompute(struct psched_ratecfg *r, const struct tc_ratespec *conf);
-static inline u32 psched_ratecfg_getrate(const struct psched_ratecfg *r)
+static inline void psched_ratecfg_getrate(struct tc_ratespec *res,
+ const struct psched_ratecfg *r)
{
- return r->rate_bps >> 3;
+ memset(res, 0, sizeof(*res));
+ res->rate = r->rate_bps >> 3;
+ res->overhead = r->overhead;
}
#endif
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -231,14 +231,14 @@ override:
}
if (R_tab) {
police->rate_present = true;
- psched_ratecfg_precompute(&police->rate, R_tab->rate.rate);
+ psched_ratecfg_precompute(&police->rate, &R_tab->rate);
qdisc_put_rtab(R_tab);
} else {
police->rate_present = false;
}
if (P_tab) {
police->peak_present = true;
- psched_ratecfg_precompute(&police->peak, P_tab->rate.rate);
+ psched_ratecfg_precompute(&police->peak, &P_tab->rate);
qdisc_put_rtab(P_tab);
} else {
police->peak_present = false;
@@ -376,9 +376,9 @@ tcf_act_police_dump(struct sk_buff *skb,
};
if (police->rate_present)
- opt.rate.rate = psched_ratecfg_getrate(&police->rate);
+ psched_ratecfg_getrate(&opt.rate, &police->rate);
if (police->peak_present)
- opt.peakrate.rate = psched_ratecfg_getrate(&police->peak);
+ psched_ratecfg_getrate(&opt.peakrate, &police->peak);
if (nla_put(skb, TCA_POLICE_TBF, sizeof(opt), &opt))
goto nla_put_failure;
if (police->tcfp_result &&
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -898,14 +898,16 @@ void dev_shutdown(struct net_device *dev
WARN_ON(timer_pending(&dev->watchdog_timer));
}
-void psched_ratecfg_precompute(struct psched_ratecfg *r, u32 rate)
+void psched_ratecfg_precompute(struct psched_ratecfg *r,
+ const struct tc_ratespec *conf)
{
u64 factor;
u64 mult;
int shift;
- r->rate_bps = (u64)rate << 3;
- r->shift = 0;
+ memset(r, 0, sizeof(*r));
+ r->overhead = conf->overhead;
+ r->rate_bps = (u64)conf->rate << 3;
r->mult = 1;
/*
* Calibrate mult, shift so that token counting is accurate
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1089,9 +1089,9 @@ static int htb_dump_class(struct Qdisc *
memset(&opt, 0, sizeof(opt));
- opt.rate.rate = psched_ratecfg_getrate(&cl->rate);
+ psched_ratecfg_getrate(&opt.rate, &cl->rate);
opt.buffer = PSCHED_NS2TICKS(cl->buffer);
- opt.ceil.rate = psched_ratecfg_getrate(&cl->ceil);
+ psched_ratecfg_getrate(&opt.ceil, &cl->ceil);
opt.cbuffer = PSCHED_NS2TICKS(cl->cbuffer);
opt.quantum = cl->quantum;
opt.prio = cl->prio;
@@ -1458,8 +1458,8 @@ static int htb_change_class(struct Qdisc
cl->prio = TC_HTB_NUMPRIO - 1;
}
- psched_ratecfg_precompute(&cl->rate, hopt->rate.rate);
- psched_ratecfg_precompute(&cl->ceil, hopt->ceil.rate);
+ psched_ratecfg_precompute(&cl->rate, &hopt->rate);
+ psched_ratecfg_precompute(&cl->ceil, &hopt->ceil);
cl->buffer = PSCHED_TICKS2NS(hopt->buffer);
cl->cbuffer = PSCHED_TICKS2NS(hopt->buffer);
--- a/net/sched/sch_tbf.c
+++ b/net/sched/sch_tbf.c
@@ -298,9 +298,9 @@ static int tbf_change(struct Qdisc *sch,
q->tokens = q->buffer;
q->ptokens = q->mtu;
- psched_ratecfg_precompute(&q->rate, rtab->rate.rate);
+ psched_ratecfg_precompute(&q->rate, &rtab->rate);
if (ptab) {
- psched_ratecfg_precompute(&q->peak, ptab->rate.rate);
+ psched_ratecfg_precompute(&q->peak, &ptab->rate);
q->peak_present = true;
} else {
q->peak_present = false;
@@ -350,9 +350,9 @@ static int tbf_dump(struct Qdisc *sch, s
goto nla_put_failure;
opt.limit = q->limit;
- opt.rate.rate = psched_ratecfg_getrate(&q->rate);
+ psched_ratecfg_getrate(&opt.rate, &q->rate);
if (q->peak_present)
- opt.peakrate.rate = psched_ratecfg_getrate(&q->peak);
+ psched_ratecfg_getrate(&opt.peakrate, &q->peak);
else
memset(&opt.peakrate, 0, sizeof(opt.peakrate));
opt.mtu = PSCHED_NS2TICKS(q->mtu);
--
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