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Date: Thu, 9 Dec 2004 10:00:37 -0800
From: "'Patrick Mansfield'" <patmans@us.ibm.com>
To: "Mukker, Atul" <Atulm@lsil.com>
Cc: "'James Bottomley'" <James.Bottomley@steeleye.com>,
       "Bagalkote, Sreenivas" <sreenib@lsil.com>,
       "'Matt Domsch'" <Matt_Domsch@Dell.com>,
       "'brking@us.ibm.com'" <brking@us.ibm.com>,
       "'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>,
       "'SCSI Mailing List'" <linux-scsi@vger.kernel.org>,
       "'bunk@fs.tum.de'" <bunk@fs.tum.de>, "'Andrew Morton'" <akpm@osdl.org>,
       "Ju, Seokmann" <sju@lsil.com>, "Doelfel, Hardy" <hdoelfel@lsil.com>
Subject: Re: How to add/drop SCSI drives from within the driver?
Message-ID: <20041209180037.GA7221@us.ibm.com>
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On Thu, Dec 09, 2004 at 12:31:37PM -0500, Mukker, Atul wrote:

> > How does the driver supply the mapping if it does not know 
> > about the "change"? Is it reserving or telling user space the 
> > hctl that will be used?
> This point was thoroughly explained in my previous post item 2. Yes, driver
> reserves a virtual bus on which all logical drives would be exported.

OK ... 

> > If so, why can't the driver call scsi_add_device(h,c,t,l) 
> > after the ioctl to create the logical drive completes?
> This idea was already turned down, see mails on linux-scsi on 12/3

Well you can call scsi_add_device() from the driver, the objections I saw
were to add an ioctl that would just call scsi_add_device().

But it doesn't matter if adding driver post-ioctl specific actions is not
an option.

-- Patrick Mansfield