On Wed, Jan 25, 2017 at 03:36:20PM -0600, Eric Blake wrote: > How do you get an fd to existing nbd block device? Your intent is to > use an ioctl to request creating/opening a new nbd device that no one > else is using; opening an existing device in order to send that ioctl > may have negative ramifications to the actual user of that existing > device, if not permissions issues that prevent the open from even > happening. Having a separate control fd makes it obvious that you are > asking for a new nbd device, and don't want to stomp on any existing > devices.
Yes, - this whole concept of needing a device first to then associate it with a backing store is something we had a in a lot of drivers, and it's always been a major problem. Thus we've been slowly moving all the drivers off it. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Nbd-general mailing list Nbd-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nbd-general
