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.
v10:
01: The option 'compress' moved up in the QAPI BlockdevDriver list
to fit its alphabetic order (noticed by Eric).
02: bdrv_filter_default_perms assigned to .bdrv_child_perm in the
compression filter driver interface (suggested by Max, noticed
by Vladimir).
Discussed in the email thread with the message ID:
<1574779398-88772-1-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 | 166 +++++++++++++++++++++++++++++++++++++++++++++
block/qcow2.c | 102 ++++++++++++++++++++--------
qapi/block-core.json | 10 +--
tests/qemu-iotests/214 | 43 ++++++++++++
tests/qemu-iotests/214.out | 14 ++++
6 files changed, 305 insertions(+), 31 deletions(-)
create mode 100644 block/filter-compress.c
--
1.8.3.1
