Blaisorblade writes:
> > Kernel command line: mem=128M ubd0=/dev/md0 ubd1=/dev/hdc9 rootfs=/dev/ubd0
> > -s
> What's -s for ?
To boot single-user.
> > Couldn't get the block size of "/dev/md0", errno = 13
> perror 13 gives:
> Permission denied.
> check the node permissions, anyway.
The permissions were right.
The problem was that (at least in 2.4.20), in md.c, at the beginning
of md_ioctl it does:
if (!md_capable_admin())
return -EACCES;
which refuses to execute any ioctl when you're not root. Perhaps
there's a way to configure capabilities or security bits to let a user
access it, but I prefered to remove this test from the beginning and
put it only in front of each "set" ioctl, letting all users to execute
all "get" ioctls.
So now I can boot from /dev/md0 as a normal user.
> > Couldn't get the block size of "/dev/md0", errno = 13
> Where tf does this comes from? I haven't found any mention of this in the
> sources...
/usr/local/src/user-mode-linux/linux-2.6.8/arch/um/os-Linux/file.c:538:
Thanks for your help. I'll see if this access test has changed in 2.6
and send patches to the authors of md.
--
__Pascal Bourguignon__ http://www.informatimago.com/
Kitty like plastic.
Confuses for litter box.
Don't leave tarp around.
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