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.
v7:
01: The 'zip_' prefix for the compression filter functions replaced with
'compress_' one.
02: .bdrv_co_preadv/pwritev (without _part) removed from the filter.
03: .bdrv_refresh_limits amended.
04: .bdrv_get_info added.
05: In qapi/block-core.json, @compress: Since 5.0 was set.
Discussed in the email thread with the message ID
<1573488277-794975-1-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 | 201 +++++++++++++++++++++++++++++++++++++++++++++
block/qcow2.c | 102 +++++++++++++++++------
qapi/block-core.json | 10 ++-
tests/qemu-iotests/214 | 43 ++++++++++
tests/qemu-iotests/214.out | 14 ++++
6 files changed, 340 insertions(+), 31 deletions(-)
create mode 100644 block/filter-compress.c
--
1.8.3.1
