[Libguestfs] [nbdkit PATCH v2 0/5] FUA support in Python scripts

First out of our four language bindings to add FUA support (for reference, I added 'zero' support for python, perl, and ruby back in 1.1.13, then Rich had to add it for ocaml in 1.1.20). I tested this heavily under python 2, but for now only compile tested under python 3; I plan to do further testing there and make any tweaks if necessary. I wrote patch 5 early on, but then realized I probably don't have a use for it if we fix the C code to cache for all plugins, so it's more for information than for applying. (It would matter if we ever had any per-connection state beyond the script's handle, and which would not also be cached on our behalf by the main nbdkit code). Something I thought of while writing patch 4, but haven't explored yet, would be using attribute((cleanup)) to automatically call Py_XDECREF() in a lot more places, for more compact code (it felt like a lot of boilerplate to avoid leaks of python objects on all exit paths). Eric Blake (5): python: Let zero's may_trim parameter be optional python: Expose can_zero callback python: Update internals to plugin API level 2 python: Expose FUA support RFC: python: Track and cache per-connection state in C struct plugins/python/nbdkit-python-plugin.pod | 85 ++++++- plugins/python/python.c | 388 ++++++++++++++++++++++++++------ plugins/python/example.py | 6 +- tests/test.py | 6 +- 4 files changed, 408 insertions(+), 77 deletions(-) -- 2.14.3