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authorJesper Dangaard Brouer <hawk@comx.dk>2007-09-12 18:35:24 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-11 03:49:20 +0400
commite9bef55d3d062ee7a78fde2913ec87ca9305a1e0 (patch)
treebb772650e7df49e94bd9c383b51f53bbb4e7bcab /include
parentb6fa1a4d746488a7de95ec16afcaf3247fedb003 (diff)
downloadlinux-e9bef55d3d062ee7a78fde2913ec87ca9305a1e0.tar.xz
[NET_SCHED]: Cleanup L2T macros and handle oversized packets
Change L2T (length to time) macros, in all rate based schedulers, to call a common function qdisc_l2t() that does the rate table lookup. This function handles if the packet size lookup is larger than the rate table, which often occurs with TSO enabled. Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/sch_generic.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 8a67f24cbe02..4ebd615bd013 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -302,4 +302,16 @@ drop:
return NET_XMIT_DROP;
}
+/* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
+ long it will take to send a packet given its size.
+ */
+static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
+{
+ int slot = pktlen;
+ slot >>= rtab->rate.cell_log;
+ if (slot > 255)
+ return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]);
+ return rtab->data[slot];
+}
+
#endif