ad8ad79f4f6078f456792f7f8d344da2be9bc74f - linux

commit	ad8ad79f4f6078f456792f7f8d344da2be9bc74f	[log] [tgz]
author	Jakub Kicinski <jakub.kicinski@netronome.com>	Wed Dec 27 18:39:07 2017 -0800
committer	Daniel Borkmann <daniel@iogearbox.net>	Sun Dec 31 16:12:23 2017 +0100
tree	0381e442d0e7c6271548366931ab662806711627
parent	ce3b9db4db0e0e2b9761c56d08615ea0159e4a1b [diff]

bpf: offload: free program id when device disappears

Bound programs are quite useless after their device disappears.
They are simply waiting for reference count to go to zero,
don't list them in BPF_PROG_GET_NEXT_ID by freeing their ID
early.

Note that orphaned offload programs will return -ENODEV on
BPF_OBJ_GET_INFO_BY_FD so user will never see ID 0.

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

include/linux/bpf.h[diff]
kernel/bpf/offload.c[diff]
kernel/bpf/syscall.c[diff]

3 files changed

tree: 0381e442d0e7c6271548366931ab662806711627