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

[Matt Domsch]

On Wed, Dec 15, 2004 at 01:24:53AM -0600, Matt Domsch wrote:
> /sys/class/scsi_host
>  |-- host0
>  |   |-- add_logical_drive
>  |   |-- remove_logical_drive
>  |   `-- rescan_logical_drive

Atul, Sreenivas:

Your management apps currently issue a private ioctl MEGAIOC_QNADAP
which returns the number of megaraid_mm-handled adapters in the
system.  How do you map a megaraid adapter number to a struct
Scsi_Host device, to be sure you're acting on the controller you think
you are?

SCSI LLDDs don't show up in sysfs under /sys/bus/scsi/drivers at
present, which is where, I think, you would want to put megaraid_mm
with links to show the scsi_host and pci_dev associated with this
adapter.  Something like this:

/sys
|-- bus
|   `-- drivers
|       `-- scsi
|           `-- megaraid_mm
|               `-- adapter0
|                   |-- pci_dev -> ../../../../../devices/pci0000:03/0000:03:06.0
|                   `-- scsi_host -> ../../../../../class/scsi/scsi_host/host0
|-- class
|   `-- scsi
|       `-- scsi_host
|           `-- host0
`-- devices
    `-- pci0000:03
        `-- 0000:03:06.0

Thoughts?
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
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