# Re: \[PATCH net-next 1/3\] bpf: introduce current-\>pid, tgid, uid, gid, comm accessors

- From: Andy Lutomirski \<hidden\>
- Date: 2015-06-12 22:09:24 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2015/06/4515096
- Thread: https://ratatoskr.run/linux-api/2015/06/4515090/t.md

```text
On Fri, Jun 12, 2015 at 2:40 PM, Alexei Starovoitov [ref] wrote:
> eBPF programs attached to kprobes need to filter based on
> current->pid, uid and other fields, so introduce helper functions:
>
> u64 bpf_get_current_pid_tgid(void)
> Return: current->tgid << 32 | current->pid
>
> u64 bpf_get_current_uid_gid(void)
> Return: current_gid << 32 | current_uid

How does this work wrt namespaces, and why the weird packing?

--Andy
```