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ipv4: be more aggressive when probing alternative gateways

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Currently, we do not notice if new alternative gateways
are added. We can do it by checking for present neigh
entry. Also, gateways that are currently probed (NUD_INCOMPLETE)
can be skipped from round-robin probing.

Suggested-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Anastasov 2015-07-23 10:39:35 +03:00 committed by David S. Miller
parent 48fb6b5545
commit 88f6432036
1 changed files with 3 additions and 1 deletions
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4
net/ipv4/fib_semantics.c
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@ -438,13 +438,15 @@ static int fib_detect_death(struct fib_info *fi, int order,
if (n) {
state = n->nud_state;
neigh_release(n);
} else {
return 0;
}
if (state == NUD_REACHABLE)
return 0;
if ((state & NUD_VALID) && order != dflt)
return 0;
if ((state & NUD_VALID) ||
(*last_idx < 0 && order > dflt)) {
(*last_idx < 0 && order > dflt && state != NUD_INCOMPLETE)) {
*last_resort = fi;
*last_idx = order;
}