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SubjectRe: [PATCH net 1/1 v1] rtnetlink: require unique netns identifier
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On 2/3/18 12:17 PM, Stephen Hemminger wrote:
> On Sat, 3 Feb 2018 14:29:04 +0100
> Christian Brauner <christian.brauner@ubuntu.com> wrote:
>
>> +static int rtnl_ensure_unique_netns_attr(const struct sock *sk,
>> + struct nlattr *tb[],
>> + struct netlink_ext_ack *extack)
>> +{
>> + int ret = -EINVAL;
>> + struct net *net = NULL, *unique_net = NULL;
>> +
>> + /* Requests without network namespace ids have been able to specify
>> + * multiple properties referring to different network namespaces so
>> + * don't regress them.
>> + */
>> + if (!tb[IFLA_IF_NETNSID])
>> + return 0;
>> +
>> + if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
>> + return 0;
>
> Isn't this an error?
>
>> +
>> + unique_net = get_net_ns_by_id(sock_net(sk), nla_get_s32(tb[IFLA_IF_NETNSID]));
>> + if (!unique_net)
>> + return -1;
>
> Other paths are returning errno, so why -1 here?
>

extack needs to be filled in too.

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