Blaster4385/linux-IllusionX
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neigh: allow admin to set NUD_STALE

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Admin should be able to set any state. Currently, this fails
when lladdr is not changed and state is changed from
NUD_CONNECTED to NUD_STALE:

ip neigh add 192.168.8.1 lladdr 00:11:22:33:44:55 nud perm dev wlan0
ip neigh show to 192.168.8.1
192.168.8.1 dev wlan0 lladdr 00:11:22:33:44:55 PERMANENT
ip neigh change 192.168.8.1 lladdr 00:11:22:33:44:55 nud stale dev wlan0
ip neigh show to 192.168.8.1
192.168.8.1 dev wlan0 lladdr 00:11:22:33:44:55 PERMANENT

Problem may be from 2.1.X days.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Reviewed-by: Chunhui He <hchunhui@mail.ustc.edu.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Anastasov 2016-07-27 09:56:50 +03:00 committed by David S. Miller
parent 1fe323aa1b
commit 0e7bbcc104
1 changed files with 2 additions and 1 deletions
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3
net/core/neighbour.c
View file

@ -1148,7 +1148,8 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
} else
goto out;
} else {
if (lladdr == neigh->ha && new == NUD_STALE)
if (lladdr == neigh->ha && new == NUD_STALE &&
!(flags & NEIGH_UPDATE_F_ADMIN))
new = old;
}
}