Re: problems with alloc_disk in genhd.c

[viro@parcelfarce.linux.theplanet.co.uk]

On Wed, Jun 23, 2004 at 04:55:12PM -0500, mikem@beardog.cca.cpqcorp.net wrote:
> On Wed, Jun 23, 2004 at 10:24:59PM +0100, viro@parcelfarce.linux.theplanet.co.uk wrote:
> > On Wed, Jun 23, 2004 at 04:18:29PM -0500, mikem@beardog.cca.cpqcorp.net wrote:
> > > In the  ioctl we are doing
> > > 
> > >         /* count partitions 1 to 15 with sizes > 0 */
> > >         for(i=0; i <MAX_PART; i++) {
> > 
> > ... followed by what?
> Here's the actual code, I typoed this first time.
> 	/* count partitions 1 to 15 with sizes > 0 */
> 	for(i=1; i <MAX_PART; i++) {
> 		if (!disk->part[i])
> 			continue;
> 		if (disk->part[i]->nr_sects != 0)
> 			luninfo.num_parts++;
> We're trying to figure how many partitions are physically on the disk. We do
> this for one of our utilities. Is there a kernel API that will return this
> data for us?

A bunch of those, starting with readdir on /sys/block/<whatever>.  Why do
you want that as a driver-specific ioctl?

That stuff has no business being in the driver.  At all.