[dm-devel] [PATCH 0/3] add path-selector init function

[Mike Christie]

Mike Christie wrote:
>> ps-manual-failover-exp.patch - this is just an exmaple of how you 
>> could use
>> the init function. Please do not apply it. It was written based on 
>> some other
>> patches, and I am trying to make it more generic so we can support 
>> other HW.
>> I am only sending it becuase I am not sure if the functions I am using to
>> send the failover command are correct and I am looking for feedback.
>>
>>
> 
> For the failover command I am currently hardcoding the format in the 
> path-selector.
> This seems like such a waste becuase if you look at sg io code 
> (block/scsi_ioctl.c
> for example), you can just pass in the command you want to execute. Is 
> there any way
> I could pass in such a thing when my target is created, so that way dm 
> multipath
> would not have any type of command format functions/modules or definitions
> (it could just be passed in and built like the sg io code).
> 

Wait let me clarify. I would not be using the sgio code. It would just
work similar to that code. I really just don't want to be forced to
have a bunch of different commands for different devices defined in a
kernel module. Christophe's tool can already determine the storage
device and the proper type of failover model to use, so when it creates
a device that requires manaul failover it can pass dm-multipath the
command too.

-- 
Mike Christie
mikenc at us.ibm.com