Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e08b09983fe9cf379faf1aefdf9164268d4610e7
Commit: e08b09983fe9cf379faf1aefdf9164268d4610e7
Parent: e9bef55d3d062ee7a78fde2913ec87ca9305a1e0
Author: Jesper Dangaard Brouer <[EMAIL PROTECTED]>
AuthorDate: Wed Sep 12 16:36:28 2007 +0200
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Wed Oct 10 16:49:20 2007 -0700
[NET_SCHED]: Making rate table lookups more flexible.
This is done in order to, add support to changing the rate table to
use the upper-boundry L2T (length to time) value. Currently we use the
lower-boundry, which result in under-estimating the actual bandwidth
usage.
Extend the tc_ratespec struct, with two parameters: 1) "cell_align"
that allow adjusting the alignment of the rate table. 2) "overhead"
that allow adding a packet overhead before the lookup.
Signed-off-by: Jesper Dangaard Brouer <[EMAIL PROTECTED]>
Acked-by: Patrick McHardy <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
include/linux/pkt_sched.h | 4 ++--
include/net/sch_generic.h | 4 +++-
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
index 268c515..919af93 100644
--- a/include/linux/pkt_sched.h
+++ b/include/linux/pkt_sched.h
@@ -77,8 +77,8 @@ struct tc_ratespec
{
unsigned char cell_log;
unsigned char __reserved;
- unsigned short feature;
- short addend;
+ unsigned short overhead;
+ short cell_align;
unsigned short mpu;
__u32 rate;
};
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 4ebd615..a02ec9e 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -307,7 +307,9 @@ drop:
*/
static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
{
- int slot = pktlen;
+ int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
+ if (slot < 0)
+ slot = 0;
slot >>= rtab->rate.cell_log;
if (slot > 255)
return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]);
-
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