Re: [PATCH 2/2] RE: How to add/drop SCSI drives from within the drive r?

[Matt Domsch <Matt_Domsch@dell.com>]

On Thu, Dec 09, 2004 at 08:24:41PM -0600, James Bottomley wrote:
> On Thu, 2004-12-09 at 20:21 -0500, Bagalkote, Sreenivas wrote:
> > +i.	Introduced driver ioctl that returns scsi address for a given ld.
> > +	
> > +	"Why can't the existing sysfs interfaces be used to do this?"
> > +		- Brian King (brking@us.ibm.com)
> > +	
> > +	"I've looked into solving this another way, but I cannot see how
> > +	to get this driver-private mapping of logical drive number-> HCTL
> > +	without putting code something like this into the driver."
> 
> OK now I look at the code, I have another suggestion.  Why not simply
> publish the logical drive number as an extra file in the device sysfs
> directory?  That way you can get your C:H:T:L, go to the end of the tree
> and cat megaraid_sd (or whatever you want to call it).

That works in the delete case, but doesn't work in the add case,
because there's no SCSI device created (yet) to have a sysfs directory
to put the file to get the information userspace needs to call
../../scan.

Thanks,
Matt

-- 
Matt Domsch
Sr. Software Engineer, Lead Engineer
Dell Linux Solutions linux.dell.com & www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com