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    SubjectRe: [PATCH v4 1/4] bpf: Export bpf_dynptr_get_size()
    On Tue, Jun 14, 2022 at 4:54 AM Roberto Sassu <roberto.sassu@huawei.com> wrote:
    >
    > Export bpf_dynptr_get_size(), so that kernel code dealing with eBPF dynamic
    > pointers can obtain the real size of data carried by this data structure.
    >
    > Cc: Joanne Koong <joannelkoong@gmail.com>
    > Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>

    LGTM

    Acked-by: Joanne Koong <joannelkoong@gmail.com>

    > ---
    > include/linux/bpf.h | 1 +
    > kernel/bpf/helpers.c | 2 +-
    > 2 files changed, 2 insertions(+), 1 deletion(-)
    >
    > diff --git a/include/linux/bpf.h b/include/linux/bpf.h
    > index 8e6092d0ea95..6eb03a0c9687 100644
    > --- a/include/linux/bpf.h
    > +++ b/include/linux/bpf.h
    > @@ -2420,5 +2420,6 @@ void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data,
    > enum bpf_dynptr_type type, u32 offset, u32 size);
    > void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr);
    > int bpf_dynptr_check_size(u32 size);
    > +u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr);
    >
    > #endif /* _LINUX_BPF_H */
    > diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
    > index 225806a02efb..29e1810afaf6 100644
    > --- a/kernel/bpf/helpers.c
    > +++ b/kernel/bpf/helpers.c
    > @@ -1430,7 +1430,7 @@ static void bpf_dynptr_set_type(struct bpf_dynptr_kern *ptr, enum bpf_dynptr_typ
    > ptr->size |= type << DYNPTR_TYPE_SHIFT;
    > }
    >
    > -static u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr)
    > +u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr)
    > {
    > return ptr->size & DYNPTR_SIZE_MASK;
    > }
    > --
    > 2.25.1
    >

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