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net_sched: tbf: support of 64bit rates

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With psched_ratecfg_precompute(), tbf can deal with 64bit rates.
Add two new attributes so that tc can use them to break the 32bit
limit.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Suggested-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yang Yingliang 2013-11-08 10:23:34 +08:00 committed by David S. Miller
parent 51f3773bde
commit a33c4a2663
2 changed files with 20 additions and 4 deletions
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2
include/uapi/linux/pkt_sched.h
View file

@ -171,6 +171,8 @@ enum {
TCA_TBF_PARMS,
TCA_TBF_RTAB,
TCA_TBF_PTAB,
TCA_TBF_RATE64,
TCA_TBF_PRATE64,
__TCA_TBF_MAX,
};

22
net/sched/sch_tbf.c
View file

@ -266,20 +266,23 @@ static const struct nla_policy tbf_policy[TCA_TBF_MAX + 1] = {
[TCA_TBF_PARMS] = { .len = sizeof(struct tc_tbf_qopt) },
[TCA_TBF_RTAB] = { .type = NLA_BINARY, .len = TC_RTAB_SIZE },
[TCA_TBF_PTAB] = { .type = NLA_BINARY, .len = TC_RTAB_SIZE },
[TCA_TBF_RATE64] = { .type = NLA_U64 },
[TCA_TBF_PRATE64] = { .type = NLA_U64 },
};
static int tbf_change(struct Qdisc *sch, struct nlattr *opt)
{
int err;
struct tbf_sched_data *q = qdisc_priv(sch);
struct nlattr *tb[TCA_TBF_PTAB + 1];
struct nlattr *tb[TCA_TBF_MAX + 1];
struct tc_tbf_qopt *qopt;
struct qdisc_rate_table *rtab = NULL;
struct qdisc_rate_table *ptab = NULL;
struct Qdisc *child = NULL;
int max_size, n;
u64 rate64 = 0, prate64 = 0;
err = nla_parse_nested(tb, TCA_TBF_PTAB, opt, tbf_policy);
err = nla_parse_nested(tb, TCA_TBF_MAX, opt, tbf_policy);
if (err < 0)
return err;
@ -341,9 +344,13 @@ 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, 0);
if (tb[TCA_TBF_RATE64])
rate64 = nla_get_u64(tb[TCA_TBF_RATE64]);
psched_ratecfg_precompute(&q->rate, &rtab->rate, rate64);
if (ptab) {
psched_ratecfg_precompute(&q->peak, &ptab->rate, 0);
if (tb[TCA_TBF_PRATE64])
prate64 = nla_get_u64(tb[TCA_TBF_PRATE64]);
psched_ratecfg_precompute(&q->peak, &ptab->rate, prate64);
q->peak_present = true;
} else {
q->peak_present = false;
@ -402,6 +409,13 @@ static int tbf_dump(struct Qdisc *sch, struct sk_buff *skb)
opt.buffer = PSCHED_NS2TICKS(q->buffer);
if (nla_put(skb, TCA_TBF_PARMS, sizeof(opt), &opt))
goto nla_put_failure;
if (q->rate.rate_bytes_ps >= (1ULL << 32) &&
nla_put_u64(skb, TCA_TBF_RATE64, q->rate.rate_bytes_ps))
goto nla_put_failure;
if (q->peak_present &&
q->peak.rate_bytes_ps >= (1ULL << 32) &&
nla_put_u64(skb, TCA_TBF_PRATE64, q->peak.rate_bytes_ps))
goto nla_put_failure;
nla_nest_end(skb, nest);
return skb->len;