The compression filter driver is introduced as suggested by Max.
A sample usage of the filter can be found in the test #214.
Now, multiple clusters can be written compressed.
It is useful for the backup job.
v12:
01: Missed to change the driver interface .bdrv_co_block_status
from _status_from_backing to _status_from_file (noticed by
Vladimir).
Andrey Shinkevich (3):
block: introduce compress filter driver
qcow2: Allow writing compressed data of multiple clusters
tests/qemu-iotests: add case to write compressed data of multiple
clusters
block/Makefile.objs | 1 +
block/filter-compress.c | 168 +++++++++++++++++++++++++++++++++++++++++++++
block/qcow2.c | 102 +++++++++++++++++++--------
qapi/block-core.json | 10 +--
tests/qemu-iotests/214 | 43 ++++++++++++
tests/qemu-iotests/214.out | 14 ++++
6 files changed, 307 insertions(+), 31 deletions(-)
create mode 100644 block/filter-compress.c
--
1.8.3.1
