[Libguestfs] [nbdkit PATCH 0/4] Play with libnbd for nbdkit-add

Patch 1 played with an early draft of Rich's Fedora 30 libnbd package: https://bugzilla.redhat.com/show_bug.cgi?id=1713767#c17 Note that comment 21 provides a newer package 0.1.1-1 with a different API; and that libnbd has more unreleased API changes in the pipeline (whether that will be called 0.2 or 0.1.2); so we'll have to tweak things based on what is actually available in distros. Patch 2 is mechanical, to try and make patch 3 a little easier to follow. Patch 3 shows that libnbd is currently feature-compatible with my hand-rolled nbd client, albeit with an order-of-magnitude slowdown that we'll have to investigate. And patch 4 is my driving reason for this series - it solves a TODO item about allowing the NBD plugin to be the symmetric solution for connecting a new server that requires encryption to an old client that can't speak it. (Although it's late enough at night that I have not actually yet added the tests to 'make check' to exercise it.) Also available at https://repo.or.cz/nbdkit/ericb.git under tag use-libnbd-v1 Eric Blake (4): nbd: Check for libnbd nbd: s/nbd_/nbdplug_/ nbd: Use libnbd 0.1 nbd: Add TLS client support plugins/nbd/nbdkit-nbd-plugin.pod | 77 +- configure.ac | 20 + plugins/nbd/nbd-standalone.c | 1364 +++++++++++++++++++++++++++++ plugins/nbd/nbd.c | 1308 +++++++++------------------ TODO | 13 +- plugins/nbd/Makefile.am | 25 +- 6 files changed, 1860 insertions(+), 947 deletions(-) create mode 100644 plugins/nbd/nbd-standalone.c -- 2.20.1