Documentation/bpf/prog_sk_lookup.rst

4 BPF sk_lookup program
7 BPF sk_lookup program type (``BPF_PROG_TYPE_SK_LOOKUP``) introduces programmability
11 When invoked BPF sk_lookup program can select a socket that will receive the
19 BPF sk_lookup program type was introduced to address setup scenarios where
36 BPF sk_lookup program can be attached to a network namespace with
53 verdict code. As for other BPF program types that are network filters,
58 A BPF sk_lookup program can also select a socket to receive the packet by
59 calling ``bpf_sk_assign()`` BPF helper. Typically, the program looks up a socket
62 selection. Selecting a socket only takes effect if the program has terminated
68 1. If any program returned ``SK_PASS`` and selected a valid socket, the socket
70 2. If more than one program returned ``SK_PASS`` and selected a socket, the last
72 3. If any program returned ``SK_DROP``, and no program returned ``SK_PASS`` and
80 In its context, an instance of ``struct bpf_sk_lookup``, BPF sk_lookup program