Jakub Sitnicki a3fd7ceee0
net: Introduce netns_bpf for BPF programs attached to netns ...
In order to:
(1) attach more than one BPF program type to netns, or
(2) support attaching BPF programs to netns with bpf_link, or
(3) support multi-prog attach points for netns
we will need to keep more state per netns than a single pointer like we
have now for BPF flow dissector program.
Prepare for the above by extracting netns_bpf that is part of struct net,
for storing all state related to BPF programs attached to netns.
Turn flow dissector callbacks for querying/attaching/detaching a program
into generic ones that operate on netns_bpf. Next patch will move the
generic callbacks into their own module.
This is similar to how it is organized for cgroup with cgroup_bpf.
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com >
Signed-off-by: Alexei Starovoitov <ast@kernel.org >
Cc: Stanislav Fomichev <sdf@google.com >
Link: https://lore.kernel.org/bpf/20200531082846.2117903-3-jakub@cloudflare.com
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