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block: Resize bitmaps on bdrv_truncate

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Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1429314609-29776-16-git-send-email-jsnow@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
John Snow 2015-04-17 19:50:03 -04:00 • committed by Kevin Wolf
parent 20dca81075
commit ce1ffea8cd
3 changed files with 76 additions and 0 deletions
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18
block.c
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@ -114,6 +114,7 @@ static void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector,
int nr_sectors);
static void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
int nr_sectors);
static void bdrv_dirty_bitmap_truncate(BlockDriverState *bs);
/* If non-zero, use only whitelisted block drivers */
static int use_bdrv_whitelist;
@ -3610,6 +3611,7 @@ int bdrv_truncate(BlockDriverState *bs, int64_t offset)
ret = drv->bdrv_truncate(bs, offset);
if (ret == 0) {
ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS);
bdrv_dirty_bitmap_truncate(bs);
if (bs->blk) {
blk_dev_resize_cb(bs->blk);
}
@ -5659,6 +5661,22 @@ BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs,
return parent;
}
/**
* Truncates _all_ bitmaps attached to a BDS.
*/
static void bdrv_dirty_bitmap_truncate(BlockDriverState *bs)
{
BdrvDirtyBitmap *bitmap;
uint64_t size = bdrv_nb_sectors(bs);
QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) {
if (bdrv_dirty_bitmap_frozen(bitmap)) {
continue;
}
hbitmap_truncate(bitmap->bitmap, size);
}
}
void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap)
{
BdrvDirtyBitmap *bm, *next;