Following Markus' advice, I updated the documentation of preallocation parameter in qapi/block-core.json adding default and allowed values (patch 1). I also updated the help related to BLOCK_OPT_PREALLOC in the QemuOptsList of file-posix (patch 2) and gluster (patch 3).
v2: - Patch 1: removed references to "file-win32" and "file-posix" in the block comment [Markus] - Patch 3: reworded commit message [Markus] Stefano Garzarella (3): qapi/block-core: update documentation of preallocation parameter block/file-posix: update .help of BLOCK_OPT_PREALLOC option block/gluster: update .help of BLOCK_OPT_PREALLOC option qapi/block-core.json | 20 ++++++++++++++------ block/file-posix.c | 6 +++++- block/gluster.c | 9 ++++++++- 3 files changed, 27 insertions(+), 8 deletions(-) -- 2.20.1