[dm-devel] [PATCH 0/4] multipath-tools: Ceph rbd support

[Mike Christie]

On 07/08/2016 03:15 AM, Christophe Varoqui wrote:
> Hi Mike,
> 
> this patchset was broken by the resync with hannes rcu v2 branch.
> Can you rebase it in the light of the changes to the conf pointer access
> applied in dbd9ad6f0e555707335ec71e1c5bec1723e02f79 ?
> 

Yeah, no problem.


> Thanks.
> 
> On Tue, Jul 5, 2016 at 10:12 AM, Mike Christie <mchristi at redhat.com
> <mailto:mchristi at redhat.com>> wrote:
> 
>     The following patches add Ceph rbd support for handling
>     blacklisted devices. This does not support features like
>     multibus.
> 
>     My specific use is for exporting rbd images through multiple
>     LIO instances. In this case, we have one rbd instance that
>     has the exclusive lock and send WRITE requests. If that host
>     becomes unreachable, then another host will grab the lock,
>     and blacklist the original host to prevent it from sending stale
>     IO (when blacklisted IO will be failed by the OSD).
> 
>     To recover from this, this patchset adds a repair() callout
>     to the checker. If the path is in the PATH_DOWN state this
>     callout can be used to fix it up. For my case, I am remapping
>     the device to flush stale IO and cleanup the old lock,
>     and then unblacklisting myself.
> 
> 
> 
> 
> 
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