bpf: Add zero_map_value to zero map value with special fields

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We need this helper to skip over special fields (bpf_spin_lock,
bpf_timer, kptrs) while zeroing a map value. Use the same logic as
copy_map_value but memset instead of memcpy.

Currently, the code zeroing map value memory does not have to deal with
special fields, hence this is a prerequisite for introducing such
support.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20220904204145.3089-4-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Kumar Kartikeya Dwivedi 2022-09-04 22:41:16 +02:00 • committed by Alexei Starovoitov

parent 6df4ea1ff0

commit cc48755808

1 changed files with 19 additions and 0 deletions

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include/linux/bpf.h

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