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[NEIGH]: Make neigh_add_timer symmetrical to neigh_del_timer. 

The neigh_del_timer() looks sane - it removes the timer and
(conditionally) puts the neighbor. I expected, that the
neigh_add_timer() is symmetrical to the del one - i.e. it
holds the neighbor and arms the timer - but it turned out
that it was not so.

I think, that making them look symmetrical makes the code
more readable.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2007-12-20 15:49:05 -08:00 committed by David S. Miller
parent 7054fb9376
commit a43d8994b9
1 changed files with 11 additions and 14 deletions
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25
net/core/neighbour.c
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@ -165,6 +165,16 @@ static int neigh_forced_gc(struct neigh_table *tbl)
return shrunk;
}
static void neigh_add_timer(struct neighbour *n, unsigned long when)
{
neigh_hold(n);
if (unlikely(mod_timer(&n->timer, when))) {
printk("NEIGH: BUG, double timer add, state is %x\n",
n->nud_state);
dump_stack();
}
}
static int neigh_del_timer(struct neighbour *n)
{
if ((n->nud_state & NUD_IN_TIMER) &&
@ -716,15 +726,6 @@ static __inline__ int neigh_max_probes(struct neighbour *n)
p->ucast_probes + p->app_probes + p->mcast_probes);
}
static inline void neigh_add_timer(struct neighbour *n, unsigned long when)
{
if (unlikely(mod_timer(&n->timer, when))) {
printk("NEIGH: BUG, double timer add, state is %x\n",
n->nud_state);
dump_stack();
}
}
/* Called when a timer expires for a neighbour entry. */
static void neigh_timer_handler(unsigned long arg)
@ -856,7 +857,6 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
atomic_set(&neigh->probes, neigh->parms->ucast_probes);
neigh->nud_state = NUD_INCOMPLETE;
neigh->updated = jiffies;
neigh_hold(neigh);
neigh_add_timer(neigh, now + 1);
} else {
neigh->nud_state = NUD_FAILED;
@ -869,7 +869,6 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
}
} else if (neigh->nud_state & NUD_STALE) {
NEIGH_PRINTK2("neigh %p is delayed.\n", neigh);
neigh_hold(neigh);
neigh->nud_state = NUD_DELAY;
neigh->updated = jiffies;
neigh_add_timer(neigh,
@ -1013,13 +1012,11 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
if (new != old) {
neigh_del_timer(neigh);
if (new & NUD_IN_TIMER) {
neigh_hold(neigh);
if (new & NUD_IN_TIMER)
neigh_add_timer(neigh, (jiffies +
((new & NUD_REACHABLE) ?
neigh->parms->reachable_time :
0)));
}
neigh->nud_state = new;
}