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.
v9: The filter functions unrelated to the 'file' child were removed.
The check for compression support in bs->file is checked in the
compress_open().
Discussed in the email thread with the message ID
<1574056144-625164-1-git-send-email-andrey.shinkev...@virtuozzo.com>
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 | 190 +++++++++++++++++++++++++++++++++++++++++++++
block/qcow2.c | 102 +++++++++++++++++-------
qapi/block-core.json | 10 ++-
tests/qemu-iotests/214 | 43 ++++++++++
tests/qemu-iotests/214.out | 14 ++++
6 files changed, 329 insertions(+), 31 deletions(-)
create mode 100644 block/filter-compress.c
--
1.8.3.1
