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net_sched: htb: support of 64bit rates

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HTB already can deal with 64bit rates, we only have to add two new
attributes so that tc can use them to break the current 32bit ABI
barrier.

TCA_HTB_RATE64 : class rate  (in bytes per second)
TCA_HTB_CEIL64 : class ceil  (in bytes per second)

This allows us to setup HTB on 40Gbps links, as 32bit limit is
actually ~34Gbps

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2013-09-19 09:10:20 -07:00 committed by David S. Miller
parent 3e1e3aae1f
commit df62cdf348
2 changed files with 17 additions and 2 deletions
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2
include/uapi/linux/pkt_sched.h
View File

@ -357,6 +357,8 @@ enum {
TCA_HTB_CTAB,
TCA_HTB_RTAB,
TCA_HTB_DIRECT_QLEN,
TCA_HTB_RATE64,
TCA_HTB_CEIL64,
__TCA_HTB_MAX,
};

17
net/sched/sch_htb.c
View File

@ -997,6 +997,8 @@ static const struct nla_policy htb_policy[TCA_HTB_MAX + 1] = {
[TCA_HTB_CTAB] = { .type = NLA_BINARY, .len = TC_RTAB_SIZE },
[TCA_HTB_RTAB] = { .type = NLA_BINARY, .len = TC_RTAB_SIZE },
[TCA_HTB_DIRECT_QLEN] = { .type = NLA_U32 },
[TCA_HTB_RATE64] = { .type = NLA_U64 },
[TCA_HTB_CEIL64] = { .type = NLA_U64 },
};
static void htb_work_func(struct work_struct *work)
@ -1114,6 +1116,12 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
opt.level = cl->level;
if (nla_put(skb, TCA_HTB_PARMS, sizeof(opt), &opt))
goto nla_put_failure;
if ((cl->rate.rate_bytes_ps >= (1ULL << 32)) &&
nla_put_u64(skb, TCA_HTB_RATE64, cl->rate.rate_bytes_ps))
goto nla_put_failure;
if ((cl->ceil.rate_bytes_ps >= (1ULL << 32)) &&
nla_put_u64(skb, TCA_HTB_CEIL64, cl->ceil.rate_bytes_ps))
goto nla_put_failure;
nla_nest_end(skb, nest);
spin_unlock_bh(root_lock);
@ -1332,6 +1340,7 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
struct qdisc_rate_table *rtab = NULL, *ctab = NULL;
struct nlattr *tb[TCA_HTB_MAX + 1];
struct tc_htb_opt *hopt;
u64 rate64, ceil64;
/* extract all subattrs from opt attr */
if (!opt)
@ -1491,8 +1500,12 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
cl->prio = TC_HTB_NUMPRIO - 1;
}
psched_ratecfg_precompute(&cl->rate, &hopt->rate, 0);
psched_ratecfg_precompute(&cl->ceil, &hopt->ceil, 0);
rate64 = tb[TCA_HTB_RATE64] ? nla_get_u64(tb[TCA_HTB_RATE64]) : 0;
ceil64 = tb[TCA_HTB_CEIL64] ? nla_get_u64(tb[TCA_HTB_CEIL64]) : 0;
psched_ratecfg_precompute(&cl->rate, &hopt->rate, rate64);
psched_ratecfg_precompute(&cl->ceil, &hopt->ceil, ceil64);
cl->buffer = PSCHED_TICKS2NS(hopt->buffer);
cl->cbuffer = PSCHED_TICKS2NS(hopt->cbuffer);