[Qemu-devel] [PATCH v12 0/6] qcow2, raw: add preallocation=full and preallocation=falloc

[Hu Tao <hutao@cn.fujitsu.com>]

This series adds two preallocation mode to qcow2 and raw:

Option preallocation=full preallocates disk space for image by writing
zeros to disk, this ensures disk space in any cases.

Option preallocation=falloc preallocates disk space by calling
posix_fallocate(). This is faster than preallocation=full.

This series depends on patches 1-3 of Max's series 'qemu-img: Implement
commit like QMP'. Specifically, patch 6 'qcow2: Add falloc and full
preallocation option' uses minimal_blob_size() introduced by Max's patch
'qcow2: Optimize bdrv_make_empty()'.

The series is also at https://github.com/taohu/qemu/commits/preallocation-v12
for you to check out, including depended patches from Max.

Eric, I'm afraid now we missed qemu 2.1, so patch 1 is still sent
with this series.

changes to v11:

 - fix test case 049 (patch 4)
 - unsigned nl2e -> uint64_t nl2e (patch 6)
 - use >> instead of / (patch 6)


Hu Tao (6):
  block: round up file size to nearest sector
  raw, qcow2: don't convert file size to sector size
  rename parse_enum_option to qapi_enum_parse and make it public
  qapi: introduce PreallocMode and a new PreallocMode full.
  raw-posix: Add falloc and full preallocation option
  qcow2: Add falloc and full preallocation option

 block/qcow2.c              | 56 +++++++++++++++++++++-------
 block/raw-posix.c          | 92 +++++++++++++++++++++++++++++++++++-----------
 block/raw-win32.c          |  6 +--
 blockdev.c                 | 30 +++------------
 include/qapi/util.h        | 17 +++++++++
 qapi/Makefile.objs         |  1 +
 qapi/block-core.json       | 17 +++++++++
 qapi/qapi-util.c           | 32 ++++++++++++++++
 tests/qemu-iotests/049.out |  2 +-
 tests/qemu-iotests/082.out | 54 +++++++++++++--------------
 tests/qemu-iotests/096     | 64 ++++++++++++++++++++++++++++++++
 tests/qemu-iotests/096.out | 14 +++++++
 tests/qemu-iotests/group   |  1 +
 13 files changed, 296 insertions(+), 90 deletions(-)
 create mode 100644 include/qapi/util.h
 create mode 100644 qapi/qapi-util.c
 create mode 100755 tests/qemu-iotests/096
 create mode 100644 tests/qemu-iotests/096.out

-- 
1.9.3