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Helper function bpf_dynptr_data

v5.19

Definition

Copyright (c) 2015 The Libbpf Authors. All rights reserved.

Get a pointer to the underlying dynptr data.

len must be a statically known value. The returned data slice is invalidated whenever the dynptr is invalidated.

skb and xdp type dynptrs may not use bpf_dynptr_data. They should instead use bpf_dynptr_slice and bpf_dynptr_slice_rdwr.

Returns

Pointer to the underlying dynptr data, NULL if the dynptr is read-only, if the dynptr is invalid, or if the offset and length is out of bounds.

static void *(* const bpf_dynptr_data)(const struct bpf_dynptr *ptr, __u32 offset, __u32 len) = (void *) 203;

Usage

Docs could be improved

This part of the docs is incomplete, contributions are very welcome

Program types

This helper call can be used in the following program types:

Example

Docs could be improved

This part of the docs is incomplete, contributions are very welcome