The purpose of this series is to use posix_fallocate() when creating img file to ensure there are disk space for it which is way fast than acturally writing to disk. But this only works in file system level. For cases like thin provisioning, an option full preallocation is added to write zeros to storage to ensure disk space.
Hu Tao (4): qapi: introduce PreallocMode and a new PreallocMode full. raw, qcow2: don't convert file size to sector size raw-posix: Add full image preallocation option qcow2: Add full image preallocation option block/qcow2.c | 95 ++++++++++++++++++++++++++++++++++++++++------ block/raw-posix.c | 63 ++++++++++++++++++++++++++---- block/raw-win32.c | 4 +- qapi-schema.json | 14 +++++++ tests/qemu-iotests/082.out | 54 +++++++++++++------------- 5 files changed, 182 insertions(+), 48 deletions(-) -- 1.8.5.2.229.g4448466