Re: [PATCH] net/9p: autoload transport modules

Thomas Weißschuh wrote on Tue, Nov 02, 2021 at 04:32:21PM +0100:

quoted

with 9p/9pnet loaded,
running "mount -t 9p -o trans=virtio tmp /mnt"
request_module("9p-%s", "virtio") returns -2 (ENOENT)

Can you retry without 9p/9pnet loaded and see if they are loaded by the mount
process?
The same autoloading functionality exists for filesystems using
request_module("fs-%s") in fs/filesystems.c
If that also doesn't work it would indicate an issue with the kernel setup in general.

Right, that also didn't work, which matches modprobe not being called
correctly

quoted

Looking at the code it should be running "modprobe -q -- 9p-virtio"
which finds the module just fine, hence my supposition usermodhelper is
not setup correctly

Do you happen to know what I need to do for it?

What is the value of CONFIG_MODPROBE_PATH?
And the contents of /proc/sys/kernel/modprobe?

aha, these two were indeed different from where my modprobe is so it is
a setup problem -- I might have been a little rash with this initrd
setup and modprobe ended up in /bin with path here in /sbin...

Thanks for the pointer, I saw the code setup an environment with a
full-blown PATH so didn't think of checking if this kind of setting
existed!
All looks in order then :)

-- 
Dominique