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block: release persistent bitmaps on inactivate

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We should release them here to reload on invalidate cache.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20170628120530.31251-31-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2017-06-28 15:05:30 +03:00 committed by Max Reitz
parent 5c36c1af27
commit 615b5dcf2d
3 changed files with 28 additions and 6 deletions
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4
block.c
View File

@ -4082,6 +4082,10 @@ static int bdrv_inactivate_recurse(BlockDriverState *bs,
}
}
/* At this point persistent bitmaps should be already stored by the format
* driver */
bdrv_release_persistent_dirty_bitmaps(bs);
return 0;
}

29
block/dirty-bitmap.c
View File

@ -356,15 +356,20 @@ void bdrv_dirty_bitmap_truncate(BlockDriverState *bs)
bdrv_dirty_bitmaps_unlock(bs);
}
static bool bdrv_dirty_bitmap_has_name(BdrvDirtyBitmap *bitmap)
{
return !!bdrv_dirty_bitmap_name(bitmap);
}
/* Called with BQL taken. */
static void bdrv_do_release_matching_dirty_bitmap(BlockDriverState *bs,
BdrvDirtyBitmap *bitmap,
bool only_named)
static void bdrv_do_release_matching_dirty_bitmap(
BlockDriverState *bs, BdrvDirtyBitmap *bitmap,
bool (*cond)(BdrvDirtyBitmap *bitmap))
{
BdrvDirtyBitmap *bm, *next;
bdrv_dirty_bitmaps_lock(bs);
QLIST_FOREACH_SAFE(bm, &bs->dirty_bitmaps, list, next) {
if ((!bitmap || bm == bitmap) && (!only_named || bm->name)) {
if ((!bitmap || bm == bitmap) && (!cond || cond(bm))) {
assert(!bm->active_iterators);
assert(!bdrv_dirty_bitmap_frozen(bm));
assert(!bm->meta);
@ -389,7 +394,7 @@ out:
/* Called with BQL taken. */
void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap)
{
bdrv_do_release_matching_dirty_bitmap(bs, bitmap, false);
bdrv_do_release_matching_dirty_bitmap(bs, bitmap, NULL);
}
/**
@ -400,7 +405,19 @@ void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap)
*/
void bdrv_release_named_dirty_bitmaps(BlockDriverState *bs)
{
bdrv_do_release_matching_dirty_bitmap(bs, NULL, true);
bdrv_do_release_matching_dirty_bitmap(bs, NULL, bdrv_dirty_bitmap_has_name);
}
/**
* Release all persistent dirty bitmaps attached to a BDS (for use in
* bdrv_inactivate_recurse()).
* There must not be any frozen bitmaps attached.
* This function does not remove persistent bitmaps from the storage.
*/
void bdrv_release_persistent_dirty_bitmaps(BlockDriverState *bs)
{
bdrv_do_release_matching_dirty_bitmap(bs, NULL,
bdrv_dirty_bitmap_get_persistance);
}
/**

1
include/block/dirty-bitmap.h
View File

@ -25,6 +25,7 @@ BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs,
void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap);
void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap);
void bdrv_release_named_dirty_bitmaps(BlockDriverState *bs);
void bdrv_release_persistent_dirty_bitmaps(BlockDriverState *bs);
void bdrv_remove_persistent_dirty_bitmap(BlockDriverState *bs,
const char *name,
Error **errp);