RE: How to add/drop SCSI drives from within the driver?

From: Mukker, Atul (Atulm_at_lsil.com)
Date: 12/09/04

  • Next message: Ingo Molnar: "Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.32-6" 
    To: "'Patrick Mansfield'" <patmans@us.ibm.com>
Date:	Thu, 9 Dec 2004 12:31:37 -0500

     
    > > 8. So, all driver has to do to assist applications is to
    > provide the
    > > logical drive number to scsi address mapping. Application
    > would say,
    > > hey! I added/removed logical drive number 5, driver
    > reverts, here is
    > > the scsi address for it "host:2, channel:5, target:5 lun:0" :-)
    >
    > 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.

    >
    > 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

    >
    > Though I am all for using hotplug to initiate scanning from
    > user space.
    good
    -
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  • Next message: Ingo Molnar: "Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.32-6"