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fix handling of initial credit for an idle pipe.

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This fixes the bug where setting bw > 1 MTU/tick resulted in
infinite bandwidth if io_fast=1

PR:		147245 148429
Obtained from:	Riccardo Panicucci
MFC after:	3 days
This commit is contained in:
Luigi Rizzo 2010-09-29 09:22:12 +00:00
parent 063045a555
commit a47ee22718
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=213265
1 changed files with 4 additions and 1 deletions
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5
sys/netinet/ipfw/ip_dn_io.c
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@ -752,8 +752,11 @@ dummynet_io(struct mbuf **m0, int dir, struct ip_fw_args *fwa)
}
/* compute the initial allowance */
{
if (si->idle_time < dn_cfg.curr_time) {
/* Do this only on the first packet on an idle pipe */
struct dn_link *p = &fs->sched->link;
si->sched_time = dn_cfg.curr_time;
si->credit = dn_cfg.io_fast ? p->bandwidth : 0;
if (p->burst) {
uint64_t burst = (dn_cfg.curr_time - si->idle_time) * p->bandwidth;