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

[Andy Lutomirski]

On Fri, Jun 12, 2015 at 3:44 PM, Alexei Starovoitov <ast@xxxxxxxxxxxx> wrote:
> On 6/12/15 3:08 PM, Andy Lutomirski wrote:
>>
>> On Fri, Jun 12, 2015 at 2:40 PM, Alexei Starovoitov <ast@xxxxxxxxxxxx>
>> 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,
>
>
> from_kuid(current_user_ns(), uid)
>

Is current_user_ns() well defined in the context of an eBPF program?

--Andy
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