Re: [PATCH bpf-next v2] docs/bpf: Document BPF map types QUEUE and STACK

[Donald Hunter <donald.hunter@xxxxxxxxx>]

Yonghong Song <yhs@xxxxxxxx> writes:

> On 11/7/22 7:05 AM, Donald Hunter wrote:
[...]
>> +
>> +Userspace
>> +---------
>> +
>> +.. c:function::
>> +   int bpf_map_update_elem (int fd, const void *key, const void *value, __u64 flags)
>> +
>> +A userspace program can push ``value`` onto a queue or stack using libbpf's
>> +``bpf_map_update_elem`` function. The ``key`` parameter must be set to
>> +``NULL`` and ``flags`` must be set to ``BPF_ANY``. Returns ``0`` on
>> +success, or negative error in case of failure.
>
> Besides BPF_ANY, BPF_EXIST is allowed as well?

Good catch, thanks!