bpf: allow clearing all sock_ops callback flags

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The helper function bpf_sock_ops_cb_flags_set() can be used to both
set and clear the sock_ops callback flags. However, its current
behavior is not consistent. BPF program may clear a flag if more than
one were set, or replace a flag with another one, but cannot clear all
flags.

This patch also updates the documentation to clarify the ability to
clear flags of this helper function.

Signed-off-by: Hoang Tran <hoang.tran@uclouvain.be>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Viet Hoang Tran 2019-04-15 09:54:55 +00:00 • committed by Alexei Starovoitov

parent 809041e765

commit 725721a650

2 changed files with 9 additions and 3 deletions

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9

include/uapi/linux/bpf.h

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3

net/core/filter.c

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