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bpf: Add bpf_dynptr_size

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bpf_dynptr_size returns the number of usable bytes in a dynptr.

Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20230420071414.570108-4-joannelkoong@gmail.com
This commit is contained in:
Joanne Koong 2023-04-20 00:14:12 -07:00 • committed by Daniel Borkmann
parent 540ccf96dd
commit 26662d7347
3 changed files with 15 additions and 6 deletions
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2
include/linux/bpf.h
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@ -1197,7 +1197,7 @@ enum bpf_dynptr_type {
};
int bpf_dynptr_check_size(u32 size);
u32 bpf_dynptr_get_size(const struct bpf_dynptr_kern *ptr);
u32 __bpf_dynptr_size(const struct bpf_dynptr_kern *ptr);
#ifdef CONFIG_BPF_JIT
int bpf_trampoline_link_prog(struct bpf_tramp_link *link, struct bpf_trampoline *tr);