[Libguestfs] [nbdkit PATCH 0/4] Fix testsuite hang with nbd-stadalone

Either patch 1 or patch 2 in isolation is sufficient to fix the problem that Rich forwarded on from an archlinux tester (name so I can credit them?). But both patches should be applied, as well as backported to appropriate stable branches, to maximize cross-version interoperability of nbdkit vs. plugins. Patch 3 will let us detect future similar bugs much faster. I want patch 4 to ensure that we guarantee our API in the future, but it isn't finished yet. Then I still need to follow up with my threat to remove nbd-standalone for 1.20 (relying on libnbd is a lot easier now than it was when we first added optional libnbd support in 1.14). Eric Blake (4): server: Normalize plugin can_* values nbd: Normalize return values of can_* tests: Don't let test-parallel-* hang on nbdkit bug RFC tests: Add test to cover unusual .can_flush return tests/Makefile.am | 21 +++++++ server/plugins.c | 24 ++++--- plugins/nbd/nbd-standalone.c | 12 ++-- tests/test-flush.sh | 85 +++++++++++++++++++++++++ tests/test-parallel-file.sh | 19 +++--- tests/test-parallel-nbd.sh | 13 ++-- tests/test-parallel-sh.sh | 19 +++--- tests/test-flush-plugin.c | 119 +++++++++++++++++++++++++++++++++++ 8 files changed, 275 insertions(+), 37 deletions(-) create mode 100755 tests/test-flush.sh create mode 100644 tests/test-flush-plugin.c -- 2.25.1