bpf: Centralize permissions checks for all BPF map types

[ Upstream commit 6c3eba1c ]

This allows to do more centralized decisions later on, and generally
makes it very explicit which maps are privileged and which are not
(e.g., LRU_HASH and LRU_PERCPU_HASH, which are privileged HASH variants,
as opposed to unprivileged HASH and HASH_PERCPU; now this is explicit
and easy to verify).

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20230613223533.3689589-4-andrii@kernel.org


Stable-dep-of: 640a6045 ("bpf, cpumap: Make sure kthread is running before map update returns")
Signed-off-by: Sasha Levin <sashal@kernel.org>