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bpf/helpers: Refactor bpf_dynptr_read and bpf_dynptr_write

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Refactor bpf_dynptr_read and bpf_dynptr_write helpers: extract code
into the static functions namely __bpf_dynptr_read and
__bpf_dynptr_write, this allows calling these without compiler warnings.

Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250226183201.332713-2-mykyta.yatsenko5@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Mykyta Yatsenko 2025-02-26 18:31:59 +00:00 committed by Alexei Starovoitov
parent b0f2ee6077
commit 09206af69c
1 changed files with 16 additions and 4 deletions
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20
kernel/bpf/helpers.c
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@ -1759,8 +1759,8 @@ static const struct bpf_func_proto bpf_dynptr_from_mem_proto = {
.arg4_type = ARG_PTR_TO_DYNPTR | DYNPTR_TYPE_LOCAL | MEM_UNINIT | MEM_WRITE,
};
BPF_CALL_5(bpf_dynptr_read, void *, dst, u32, len, const struct bpf_dynptr_kern *, src,
u32, offset, u64, flags)
static int __bpf_dynptr_read(void *dst, u32 len, const struct bpf_dynptr_kern *src,
u32 offset, u64 flags)
{
enum bpf_dynptr_type type;
int err;
@ -1793,6 +1793,12 @@ BPF_CALL_5(bpf_dynptr_read, void *, dst, u32, len, const struct bpf_dynptr_kern
}
}
BPF_CALL_5(bpf_dynptr_read, void *, dst, u32, len, const struct bpf_dynptr_kern *, src,
u32, offset, u64, flags)
{
return __bpf_dynptr_read(dst, len, src, offset, flags);
}
static const struct bpf_func_proto bpf_dynptr_read_proto = {
.func = bpf_dynptr_read,
.gpl_only = false,
@ -1804,8 +1810,8 @@ static const struct bpf_func_proto bpf_dynptr_read_proto = {
.arg5_type = ARG_ANYTHING,
};
BPF_CALL_5(bpf_dynptr_write, const struct bpf_dynptr_kern *, dst, u32, offset, void *, src,
u32, len, u64, flags)
static int __bpf_dynptr_write(const struct bpf_dynptr_kern *dst, u32 offset, void *src,
u32 len, u64 flags)
{
enum bpf_dynptr_type type;
int err;
@ -1843,6 +1849,12 @@ BPF_CALL_5(bpf_dynptr_write, const struct bpf_dynptr_kern *, dst, u32, offset, v
}
}
BPF_CALL_5(bpf_dynptr_write, const struct bpf_dynptr_kern *, dst, u32, offset, void *, src,
u32, len, u64, flags)
{
return __bpf_dynptr_write(dst, offset, src, len, flags);
}
static const struct bpf_func_proto bpf_dynptr_write_proto = {
.func = bpf_dynptr_write,
.gpl_only = false,