net_sched: restore "overhead xxx" handling

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@redhat.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Vimalkumar <j.vimal@gmail.com>
Cc: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 17 insertions, 15 deletions

diff --git a/net/sched/act_police.c b/net/sched/act_police.c
index 823463adbd21..189e3c5b3d09 100644
--- 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, struct tc_action *a, int bind, int ref)
         };
 
         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 &&
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index eac7e0ee23c1..20224086cc28 100644
--- 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
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 79b1876b6cd2..f87fb850b7ef 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1090,9 +1090,9 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
 
         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;
@@ -1459,8 +1459,8 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
                         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);
diff --git a/net/sched/sch_tbf.c b/net/sched/sch_tbf.c
index c8388f3c3426..e478d316602b 100644
--- a/net/sched/sch_tbf.c
+++ b/net/sched/sch_tbf.c
@@ -298,9 +298,9 @@ static int tbf_change(struct Qdisc *sch, struct nlattr *opt)
         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, struct sk_buff *skb)
                 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);