bpf: Add bpf_dynptr_from_mem for local dynptrs

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This patch adds a new api bpf_dynptr_from_mem:

long bpf_dynptr_from_mem(void *data, u32 size, u64 flags, struct bpf_dynptr *ptr);

which initializes a dynptr to point to a bpf program's local memory. For now
only local memory that is of reg type PTR_TO_MAP_VALUE is supported.

Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220523210712.3641569-3-joannelkoong@gmail.com

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Joanne Koong 2022-05-23 14:07:08 -07:00 • committed by Andrii Nakryiko

parent 97e03f5210

commit 263ae152e9

4 changed files with 95 additions and 0 deletions

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tools/include/uapi/linux/bpf.h

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