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

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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>

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Quentin Monnet 2019-08-20 14:53:46 +01:00 • committed by Daniel Borkmann

parent ede6bc88d6

commit 3481e64bbe

1 changed files with 12 additions and 0 deletions

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kernel/bpf/btf.c

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