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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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10
blockdev.c
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@ -2825,14 +2825,9 @@ void qmp_block_dirty_bitmap_add(const char *node, const char *name,
if (!has_persistent) {
persistent = false;
}
if (!has_autoload) {
autoload = false;
}
if (has_autoload && !persistent) {
error_setg(errp, "Autoload flag must be used only for persistent "
"bitmaps");
return;
if (has_autoload) {
warn_report("Autoload option is deprecated and its value is ignored");
}
if (persistent &&
@ -2847,7 +2842,6 @@ void qmp_block_dirty_bitmap_add(const char *node, const char *name,
}
bdrv_dirty_bitmap_set_persistance(bitmap, persistent);
bdrv_dirty_bitmap_set_autoload(bitmap, autoload);
}
void qmp_block_dirty_bitmap_remove(const char *node, const char *name,