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Re: [dm-devel] [PATCH] Associate HBA and storage in rdac_controller to support partitions in storage



On Wed, 2011-07-20 at 14:22 -0700, Chandra Seetharaman wrote:
> rdac hardware handler assumes that there is one-to-one relation ship
> between the host and the controller w.r.t lun.  IOW, it does not
> support "multiple storage partitions" within a storage.
> 
> Example:
> HBA1 and HBA2 see lun 0 and 1 in storage A (1)
> HBA3 and HBA4 see lun 0 and 1 in storage A (2)
> HBA5 and HBA6 see lun 0 and 1 in storage A (3)
> 
> luns 0 and 1 in (1), (2) and (3) are totally different.
> 
> But, rdac handler treats the lun 0s (and lun 1s) as the same when 
> sending a mode select to the controller, which is wrong.
> 
> This patch makes the rdac hardware handler associate HBA and the
> storage w.r.t lun (and not the host itself).
> 
> Signed-off-by: Chandra Seetharaman <sekharan us ibm com>
> ---
>  drivers/scsi/device_handler/scsi_dh_rdac.c |   10 +++++++---
>  1 files changed, 7 insertions(+), 3 deletions(-)

This doesn't apply;

patching file drivers/scsi/device_handler/scsi_dh_rdac.c
Hunk #1 succeeded at 158 (offset 9 lines).
Hunk #2 FAILED at 381.
Hunk #3 FAILED at 389.
Hunk #4 FAILED at 403.
Hunk #5 FAILED at 526.
4 out of 5 hunks FAILED -- saving rejects to file
drivers/scsi/device_handler/scsi_dh_rdac.c.rej


it looks like there's a missing intermediate patch somewhere, can you
check scsi-misc and tell me what it is?

Thanks,

James




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