tree d559bb98a7c7bc23bc2aea6bb69d32880c5679cb
parent ede6bc88d6bbe16a938de2b00f60f4e03768c988
author Quentin Monnet <quentin.monnet@netronome.com> 1566309226 +0100
committer Daniel Borkmann <daniel@iogearbox.net> 1566310752 +0200

bpf: add BTF ids in procfs for file descriptors to BTF objects

Implement the show_fdinfo hook for BTF FDs file operations, and make it
print the id of the BTF object. This allows for a quick retrieval of the
BTF id from its FD; or it can help understanding what type of object
(BTF) the file descriptor points to.

v2:
- Do not expose data_size, only btf_id, in FD info.

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>