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net/sched: act_tunnel_key: disambiguate metadata dst error cases

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Metadata may be NULL for one of two reasons:
* Missing user input
* Failure to allocate the metadata dst

Disambiguate these case by returning -EINVAL for the former and -ENOMEM
for the latter rather than -EINVAL for both cases.

This is in preparation for using extended ack to provide more information
to users when parsing their input.

Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Simon Horman 2018-06-26 21:39:34 -07:00 committed by David S. Miller
parent c90d160487
commit a1165b5919
1 changed files with 4 additions and 1 deletions
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5
net/sched/act_tunnel_key.c
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@ -143,10 +143,13 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
metadata = __ipv6_tun_set_dst(&saddr, &daddr, 0, 0, dst_port,
0, flags,
key_id, 0);
} else {
ret = -EINVAL;
goto err_out;
}
if (!metadata) {
ret = -EINVAL;
ret = -ENOMEM;
goto err_out;
}