[Libguestfs] [nbdkit PATCH 0/3] Fix some NBDKIT_EMULATE_ bugs

Rich pointed out an assertion failure in the luks filter caused by a bug in backend.c's handling of NBDKIT_EMULATE_ZERO for .can_zero; while fixing it, I found a different bug in NBDKIT_EMULATE_CACHE. Eric Blake (3): server: Fix NBDKIT_ZERO_EMULATE from filters server: Fix NBDKIT_CACHE_EMULATE tests: Add regression test for NBDKIT_EMULATE_CACHE fix docs/nbdkit-filter.pod | 8 ++-- docs/nbdkit-plugin.pod | 3 +- tests/Makefile.am | 2 + server/backend.c | 38 +++++++++++++++++- filters/nozero/nozero.c | 39 ++---------------- tests/test-eval-cache.sh | 85 ++++++++++++++++++++++++++++++++++++++++ tests/test-nozero.sh | 78 ++++++++++++++++-------------------- 7 files changed, 167 insertions(+), 86 deletions(-) create mode 100755 tests/test-eval-cache.sh -- 2.36.1