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authorYang Yingliang <yangyingliang@huawei.com>2014-02-14 10:30:43 +0800
committerDavid S. Miller <davem@davemloft.net>2014-02-14 00:15:20 -0500
commitc045a734da4cb6d4665962f252de3d8871136ae9 (patch)
treeb3ddf538461176d277602de09e0b56838c9c387d
parent49545a7775e746e4e32d1524801221ffdfe1cc0a (diff)
downloadblackbird-op-linux-c045a734da4cb6d4665962f252de3d8871136ae9.tar.gz
blackbird-op-linux-c045a734da4cb6d4665962f252de3d8871136ae9.zip
sch_netem: replace magic numbers with enumerate in GE model
Replace some magic numbers which describe states of GE model loss generator with enumerate. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/sched/sch_netem.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 4a5eb2841351..4fced67e94c8 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -117,6 +117,11 @@ struct netem_sched_data {
LOST_IN_BURST_PERIOD,
} _4_state_model;
+ enum {
+ GOOD_STATE = 1,
+ BAD_STATE,
+ } GE_state_model;
+
/* Correlated Loss Generation models */
struct clgstate {
/* state of the Markov chain */
@@ -272,15 +277,15 @@ static bool loss_gilb_ell(struct netem_sched_data *q)
struct clgstate *clg = &q->clg;
switch (clg->state) {
- case 1:
+ case GOOD_STATE:
if (prandom_u32() < clg->a1)
- clg->state = 2;
+ clg->state = BAD_STATE;
if (prandom_u32() < clg->a4)
return true;
break;
- case 2:
+ case BAD_STATE:
if (prandom_u32() < clg->a2)
- clg->state = 1;
+ clg->state = GOOD_STATE;
if (prandom_u32() > clg->a3)
return true;
}
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