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block: maintain persistent disabled bitmaps

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To maintain load/store disabled bitmap there is new approach:

 - deprecate @autoload flag of block-dirty-bitmap-add, make it ignored
 - store enabled bitmaps as "auto" to qcow2
 - store disabled bitmaps without "auto" flag to qcow2
 - on qcow2 open load "auto" bitmaps as enabled and others
   as disabled (except in_use bitmaps)

Also, adjust iotests 165 and 176 appropriately.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20180202160752.143796-1-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2018-02-02 19:07:52 +03:00 • committed by Max Reitz
parent 74f1eabf9c
commit 3e99da5e76
10 changed files with 23 additions and 39 deletions
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6
qapi/block-core.json
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@ -1593,9 +1593,9 @@
# Qcow2 disks support persistent bitmaps. Default is false for
# block-dirty-bitmap-add. (Since: 2.10)
#
# @autoload: the bitmap will be automatically loaded when the image it is stored
# in is opened. This flag may only be specified for persistent
# bitmaps. Default is false for block-dirty-bitmap-add. (Since: 2.10)
# @autoload: ignored and deprecated since 2.12.
# Currently, all dirty tracking bitmaps are loaded from Qcow2 on
# open.
#
# Since: 2.4
##