netem: define NETEM_DIST_MAX

Rather than magic constant in code, expose the maximum size of
packet distribution table in API. In iproute2, q_netem defines
MAX_DIST as 16K already.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
index 5afee2b..8913822 100644 (file)
--- a/include/linux/pkt_sched.h
+++ b/include/linux/pkt_sched.h
@@ -495,6 +495,7 @@ struct tc_netem_corrupt {
 };
 
 #define NETEM_DIST_SCALE       8192
+#define NETEM_DIST_MAX         16384
 
 /* DRR */
 

diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 86dad1e..289febd 100644 (file)
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -332,7 +332,7 @@ static int get_dist_table(struct Qdisc *sch, const struct nlattr *attr)
        int i;
        size_t s;
 
-       if (n > 65536)
+       if (n > NETEM_DIST_MAX)
                return -EINVAL;
 
        s = sizeof(struct disttable) + n * sizeof(s16);