netfilter: nf_tables: hit ENOENT on unexisting chain/flowtable update with missing...

netfilter: nf_tables: hit ENOENT on unexisting chain/flowtable update with missing attributes

[ Upstream commit 8509f62b0b07ae8d6dec5aa9613ab1b250ff632f ]

If user does not specify hook number and priority, then assume this is
a chain/flowtable update. Therefore, report ENOENT which provides a
better hint than EINVAL. Set on extended netlink error report to refer
to the chain name.

Fixes: 5b6743fb2c2a ("netfilter: nf_tables: skip flowtable hooknum and priority on device updates")
Fixes: 5efe72698a97 ("netfilter: nf_tables: support for adding new devices to an existing netdev chain")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>