[ENBD] Re: ENBD on Debian 2.6.7/8 kernel

[P.T. Breuer]

In article <41615BFB.2080601 at ociweb.com> you wrote:
> | There is something wrong with your compilation, or development
> | environment, or configuration.  You have located the problem as
> | being in userspace.
> 
> 
> Ok.  I will look at how the test environment is setup and attempt to
> duplicate it for the non-localhost case.

I've been able to run a 2.6.7 UML kernel at last - the UML kernel is
extremely unstable on my system, and I have had lots of trouble getting
to this point, so my apologies for lateness (I think the UML problem is
a timing problem with reading pipes under glibc).

About all I can say at this point is that in order to load the enbd
module without an oops (well, I get an oops in that kernel just by
pasting terminal input into a cat | cat >/dev/null with the mouse), I
had to make the following one line patch to enbd_base.c:

(in enbd_set_disk, which deals with initializing the stuff that
/proc/partitions reports)

        if (!disk) {
                return -EINVAL;
        }
        disk->major = major;
        disk->first_minor = first_minor;
+       disk->minors = npart;
        disk->fops = &enbd_blkops;
        disk->private_data = lo;
        disk->queue = lo->q;

and probably I should start by zeroing the whole gendisk struct.

Peter