diff options
Diffstat (limited to 'include/net/sch_generic.h')
| -rw-r--r-- | include/net/sch_generic.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 8a67f24cbe0..a02ec9e5fea 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -302,4 +302,18 @@ 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 + 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]); + return rtab->data[slot]; +} + #endif |