On Thu, Jul 14, 2022 at 3:48 PM Joanne Koong <joannelkoong@xxxxxxxxx> wrote:
>
> Fix documentation for bpf_skb_pull_data() helper for
> when flags == 0.
sorry, this commit message should be "when len == 0" (not flags).
>
> Fixes: fa15601ab31e ("bpf: add documentation for eBPF helpers (33-41)")
> Signed-off-by: Joanne Koong <joannelkoong@xxxxxxxxx>
> ---
> include/uapi/linux/bpf.h | 3 ++-
> tools/include/uapi/linux/bpf.h | 3 ++-
> 2 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
> index 379e68fb866f..a80c1f6bbe25 100644
> --- a/include/uapi/linux/bpf.h
> +++ b/include/uapi/linux/bpf.h
> @@ -2361,7 +2361,8 @@ union bpf_attr {
> * Pull in non-linear data in case the *skb* is non-linear and not
> * all of *len* are part of the linear section. Make *len* bytes
> * from *skb* readable and writable. If a zero value is passed for
> - * *len*, then the whole length of the *skb* is pulled.
> + * *len*, then all bytes in the head of the skb will be made readable
> + * and writable.
> *
> * This helper is only needed for reading and writing with direct
> * packet access.
> diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
> index 379e68fb866f..a80c1f6bbe25 100644
> --- a/tools/include/uapi/linux/bpf.h
> +++ b/tools/include/uapi/linux/bpf.h
> @@ -2361,7 +2361,8 @@ union bpf_attr {
> * Pull in non-linear data in case the *skb* is non-linear and not
> * all of *len* are part of the linear section. Make *len* bytes
> * from *skb* readable and writable. If a zero value is passed for
> - * *len*, then the whole length of the *skb* is pulled.
> + * *len*, then all bytes in the head of the skb will be made readable
> + * and writable.
> *
> * This helper is only needed for reading and writing with direct
> * packet access.
> --
> 2.30.2
>
