[lkml]   [2018]   [Mar]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH net-next] modules: allow modprobe load regular elf binaries
On Tue, Mar 6, 2018 at 1:34 AM, Alexei Starovoitov <> wrote:
> As the first step in development of bpfilter project [1] the request_module()
> code is extended to allow user mode helpers to be invoked. Idea is that
> user mode helpers are built as part of the kernel build and installed as
> traditional kernel modules with .ko file extension into distro specified
> location, such that from a distribution point of view, they are no different
> than regular kernel modules. Thus, allow request_module() logic to load such
> user mode helper (umh) modules via:
> request_module("foo") ->
> call_umh("modprobe foo") ->
> sys_finit_module(FD of /lib/modules/.../foo.ko) ->
> call_umh(struct file)

I assume I'm missing some context here, but why does this need to be
handled by the kernel rather than, say, a change to how modprobe
works? I imagine that usermode tooling needs to change regardless
because the existing tools may get rather confused if a .ko "module"
is really a dynamically liked program. I notice that you're using
ET_EXEC in your example, and that will probably avoid problems, but I
imagine that some distros would much rather use ET_DYN.

 \ /
  Last update: 2018-03-06 21:02    [W:0.248 / U:4.492 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site