Re: partitionable md devices and partition detection

[Neil Brown]

On Wednesday July 7, chutz@xxxxxxx wrote:
> What is the proper way to detect the partitions on a md device during kernel
> initialization?

Hmm... I guess there isn't.
I remember having a lot of trouble getting partitions to be recognised
when an array is first assembled, and deciding it was just easier to
leave it to user-space.  However that isn't an option when booting
without an initrd.

The following patch should make it work for the
  md=d0,....
case.  The "raid=part" case is a bit harder....

NeilBrown


diff ./init/do_mounts_md.c~current~ ./init/do_mounts_md.c
--- ./init/do_mounts_md.c~current~	2004-07-07 15:20:05.000000000 +1000
+++ ./init/do_mounts_md.c	2004-07-07 15:20:57.000000000 +1000
@@ -232,6 +232,8 @@ static void __init md_setup_drive(void)
 			err = sys_ioctl(fd, RUN_ARRAY, 0);
 		if (err)
 			printk(KERN_WARNING "md: starting md%d failed\n", minor);
+		else
+			sys_ioctl(fd, BLKRRPART, 0);
 		sys_close(fd);
 	}
 }
-
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