Hi Josef,
On Thu, Apr 06, 2017 at 05:05:25PM -0400, Josef Bacik wrote:
>
> > On Apr 6, 2017, at 5:01 PM, Josef Bacik <[email protected]> wrote:
> >
> > This patchset adds a new netlink configuration interface to NBD as well as a
> > bunch of enhancments around path failures. The patches provide the
> > following
> > enhancemnts to NBD
> >
> > - Netlink configuration interface that doesn't leave a userspace application
> > waiting in kernel space for the device to disconnect.
> > - Netlink reconfigure interface for adding re-connected sockets to replace
> > dead
> > sockets.
> > - A flag to destroy the NBD device on disconnect, much like how mount -o
> > loop
> > works.
> > - A status interface that currently will only report whether a device is
> > connected or not, but can be extended to include whatever in the future.
> > - A netlink multicast notification scheme to notify user space when there
> > are
> > connection issues to allow for seamless reconnects.
> > - Dead link handling. You can specify a dead link timeout and the NBD
> > device
> > will pause IO for that timeout waiting to see if the connection can be
> > re-established. This is helpful to allow for things like nbd server
> > upgrades
> > where the whole server disappears for a short period of time.
> >
> > These patches have been thorougly and continuously tested for about a month.
> > I've been finding bugs in various places, but this batch has been solid for
> > the
> > last few days of testing, which include a constant disconnect/reconnect
> > torture
> > test. Thanks,
>
> Oops forgot to mention that I have patches for the nbd user space side
> that utilizes all of these new interfaces, you can find the tree here
>
> https://github.com/josefbacik/nbd
Yeah, found that already :-)
> The user space patches are a bit rough, but utilize everything so good
> for testing. They will be cleaned up and submitted once the kernel
> part is upstream. Thanks,
No worries, I'll probably clean it up myself. TBH, cleaning up
nbd-client so it becomes somewhat less of a beast has been on my TODO
list for a while, and this will only add to it... maybe that'll finally
convince me that it's time ;-)
--
< ron> I mean, the main *practical* problem with C++, is there's like a dozen
people in the world who think they really understand all of its rules,
and pretty much all of them are just lying to themselves too.
-- #debian-devel, OFTC, 2016-02-12
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