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netlink: call unbind when releasing socket 

Currently, netlink_unbind() is only called when the socket
explicitly unbinds, which limits its usefulness (luckily
there are no users of it yet anyway.)

Call netlink_unbind() also when a socket is released, so it
becomes possible to track listeners with this callback and
without also implementing a netlink notifier (and checking
netlink_has_listeners() in there.)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg 2014-12-22 18:56:38 +01:00 committed by David S. Miller
parent b10dcb3b94
commit 7d68536bed
1 changed files with 7 additions and 0 deletions
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7
net/netlink/af_netlink.c
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@ -1246,6 +1246,13 @@ static int netlink_release(struct socket *sock)
netlink_table_ungrab();
}
if (nlk->netlink_unbind) {
int i;
for (i = 0; i < nlk->ngroups; i++)
if (test_bit(i, nlk->groups))
nlk->netlink_unbind(i + 1);
}
kfree(nlk->groups);
nlk->groups = NULL;