On Mon, Jan 21, 2013 at 04:25:32PM +0100, Goswin von Brederlow wrote: > On Mon, Jan 21, 2013 at 09:08:15AM +0100, Wouter Verhelst wrote: > > On Mon, Jan 14, 2013 at 01:41:34PM +0100, Andreas Klauer wrote: > > > Hi, > > > > > > I need to implement a block device in user space with my own idea > > > of read and write (like a selective copy-on-write layer). The thing > > > would be machine-local, network is not important. > > > > > > I'm currently using FUSE + loop for that, but googling I came across > > > a [1]BUSE discussion on LKML which in turn referred to NBD. > > > (never even heard of NBD before... *blush*) > > > > > > I experimented a bit with it and it seems like an interesting > > > alternative for me, but to use it, it appears I have to implement > > > the protocol myself since there doesn't seem to be a C library like > > > the one FUSE offers? Or is there one I have missed? > > > > There isn't such a library, indeed. I've been thinking about turning the > > server side of NBD into a library and making nbd-server depend on that > > off and on for a few years, but it just hasn't happened (yet?) > > I've been thinking of writing a buse kernel module (like fuse/cuse but > for block devices) on and off for a few years, but it just hasn't > happened (yet?). > > Now wouldn't it be great to design the NBD server library in such a > way that it would provide a suitable API for both use cases? After all > buse would just cut out the tcp socket inbetween the server and client > part and communicate with the kernel directly.
You can just create a unix domain socket and pass that on to the kernel, really. There, you now have a block device in user space ;-) -- Copyshops should do vouchers. So that next time some bureaucracy requires you to mail a form in triplicate, you can mail it just once, add a voucher, and save on postage. ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnnow-d2d _______________________________________________ Nbd-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/nbd-general
