Re: [RFC PATCH bpf-next 0/3] bpf: freeze a task cgroup from bpf

[Tejun Heo]

Hello, Alexei.

On Thu, Mar 28, 2024 at 10:32:24AM -0700, Alexei Starovoitov wrote:
> > It bothers me a bit that it's adding a dedicated interface for something
> > which already has a defined userspace interface. Would it be better to have
> > kfunc wrappers for kernel_read() and kernel_write()?
> 
> How would that look ?
> prog cannot and shouldn't open a file.

Oh, I didn't know. Why is that?

> The seq_file would be passed/pinned by user space?

Would it work if it's just "open this file, write this and then close it"?

Thanks.

-- 
tejun