Commit e9bef55d authored by Jesper Dangaard Brouer's avatar Jesper Dangaard Brouer Committed by David S. Miller

[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: default avatarJesper Dangaard Brouer <hawk@comx.dk>
Acked-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b6fa1a4d
......@@ -302,4 +302,16 @@ static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch)
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
......@@ -21,8 +21,8 @@
#include <net/act_api.h>
#include <net/netlink.h>
#define L2T(p,L) ((p)->tcfp_R_tab->data[(L)>>(p)->tcfp_R_tab->rate.cell_log])
#define L2T_P(p,L) ((p)->tcfp_P_tab->data[(L)>>(p)->tcfp_P_tab->rate.cell_log])
#define L2T(p,L) qdisc_l2t((p)->tcfp_R_tab, L)
#define L2T_P(p,L) qdisc_l2t((p)->tcfp_P_tab, L)
#define POL_TAB_MASK 15
static struct tcf_common *tcf_police_ht[POL_TAB_MASK + 1];
......
......@@ -175,7 +175,7 @@ struct cbq_sched_data
};
#define L2T(cl,len) ((cl)->R_tab->data[(len)>>(cl)->R_tab->rate.cell_log])
#define L2T(cl,len) qdisc_l2t((cl)->R_tab,len)
static __inline__ unsigned cbq_hash(u32 h)
......
......@@ -132,10 +132,8 @@ struct htb_class {
static inline long L2T(struct htb_class *cl, struct qdisc_rate_table *rate,
int size)
{
int slot = size >> rate->rate.cell_log;
if (slot > 255)
return (rate->data[255]*(slot >> 8) + rate->data[slot & 0xFF]);
return rate->data[slot];
long result = qdisc_l2t(rate, size);
return result;
}
struct htb_sched {
......
......@@ -115,8 +115,8 @@ struct tbf_sched_data
struct qdisc_watchdog watchdog; /* Watchdog timer */
};
#define L2T(q,L) ((q)->R_tab->data[(L)>>(q)->R_tab->rate.cell_log])
#define L2T_P(q,L) ((q)->P_tab->data[(L)>>(q)->P_tab->rate.cell_log])
#define L2T(q,L) qdisc_l2t((q)->R_tab,L)
#define L2T_P(q,L) qdisc_l2t((q)->P_tab,L)
static int tbf_enqueue(struct sk_buff *skb, struct Qdisc* sch)
{
......
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