Libbpf userspace function bpf_map__set_value_size
Sets map value size.
Definition
int bpf_map__set_value_size(struct bpf_map *map, __u32 size);
Parameters
map: the BPF map instance
Return
0, on success; negative error, otherwise
Usage
There is a special case for maps with associated memory-mapped regions, like the global data section maps (bss, data, rodata). When this function is used on such a map, the mapped region is resized. Afterward, an attempt is made to adjust the corresponding BTF info. This attempt is best-effort and can only succeed if the last variable of the data section map is an array. The array BTF type is replaced by a new BTF array type with a different length. Any previously existing pointers returned from bpf_map__initial_value or corresponding data section skeleton pointer must be reinitialized.
Example
Docs could be improved
This part of the docs is incomplete, contributions are very welcome