From: Jesper Dangaard Brouer Date: Wed, 12 Sep 2007 14:36:28 +0000 (+0200) Subject: [NET_SCHED]: Making rate table lookups more flexible. X-Git-Tag: v2.6.24-rc1~1454^2~677 X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=e08b09983fe9cf379faf1aefdf9164268d4610e7;p=linux-2.6-omap-h63xx.git [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 Acked-by: Patrick McHardy Signed-off-by: David S. Miller --- diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h index 268c51599eb..919af93b705 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 4ebd615bd01..a02ec9e5fea 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]);