Helper function bpf_dynptr_data
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