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tipc: refactor function tipc_link_timeout()

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The function tipc_link_timeout() is unnecessary complex, and can
easily be made more readable.

We do that with this commit. The only functional change is that we
remove a redundant test for whether the broadcast link is up or not.

Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Paul Maloy 2016-04-15 13:33:05 -04:00 committed by David S. Miller
parent 88e8ac7000
commit 42b18f605f
1 changed files with 16 additions and 20 deletions
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36
net/tipc/link.c
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@ -704,37 +704,33 @@ static void link_profile_stats(struct tipc_link *l)
*/
int tipc_link_timeout(struct tipc_link *l, struct sk_buff_head *xmitq)
{
int rc = 0;
int mtyp = STATE_MSG;
bool xmit = false;
bool prb = false;
int mtyp, rc = 0;
bool state = false;
bool probe = false;
bool setup = false;
u16 bc_snt = l->bc_sndlink->snd_nxt - 1;
u16 bc_acked = l->bc_rcvlink->acked;
bool bc_up = link_is_up(l->bc_rcvlink);
link_profile_stats(l);
switch (l->state) {
case LINK_ESTABLISHED:
case LINK_SYNCHING:
if (!l->silent_intv_cnt) {
if (bc_up && (bc_acked != bc_snt))
xmit = true;
} else if (l->silent_intv_cnt <= l->abort_limit) {
xmit = true;
prb = true;
} else {
rc |= tipc_link_fsm_evt(l, LINK_FAILURE_EVT);
}
l->silent_intv_cnt++;
if (l->silent_intv_cnt > l->abort_limit)
return tipc_link_fsm_evt(l, LINK_FAILURE_EVT);
mtyp = STATE_MSG;
state = bc_acked != bc_snt;
probe = l->silent_intv_cnt;
if (probe)
l->silent_intv_cnt++;
break;
case LINK_RESET:
xmit = l->rst_cnt++ <= 4;
xmit |= !(l->rst_cnt % 16);
setup = l->rst_cnt++ <= 4;
setup |= !(l->rst_cnt % 16);
mtyp = RESET_MSG;
break;
case LINK_ESTABLISHING:
xmit = true;
setup = true;
mtyp = ACTIVATE_MSG;
break;
case LINK_PEER_RESET:
@ -745,8 +741,8 @@ int tipc_link_timeout(struct tipc_link *l, struct sk_buff_head *xmitq)
break;
}
if (xmit)
tipc_link_build_proto_msg(l, mtyp, prb, 0, 0, 0, xmitq);
if (state || probe || setup)
tipc_link_build_proto_msg(l, mtyp, probe, 0, 0, 0, xmitq);
return rc;
}