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block/copy-before-write: initialize block-copy bitmap

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We are going to publish copy-before-write filter to be used in separate
of backup. Future step would support bitmap for the filter. But let's
start from full set bitmap.

We have to modify backup, as bitmap is first initialized by
copy-before-write filter, and then backup modifies it.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20210824083856.17408-20-vsementsov@virtuozzo.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-08-24 11:38:41 +03:00 • committed by Hanna Reitz
parent f44fd7399c
commit 06e0a9c164
2 changed files with 11 additions and 9 deletions
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4
block/copy-before-write.c
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@ -147,6 +147,7 @@ static void cbw_child_perm(BlockDriverState *bs, BdrvChild *c,
static int cbw_init(BlockDriverState *bs, QDict *options, Error **errp)
{
BDRVCopyBeforeWriteState *s = bs->opaque;
BdrvDirtyBitmap *copy_bitmap;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_of_bds,
BDRV_CHILD_FILTERED | BDRV_CHILD_PRIMARY,
@ -174,6 +175,9 @@ static int cbw_init(BlockDriverState *bs, QDict *options, Error **errp)
return -EINVAL;
}
copy_bitmap = block_copy_dirty_bitmap(s->bcs);
bdrv_set_dirty_bitmap(copy_bitmap, 0, bdrv_dirty_bitmap_size(copy_bitmap));
return 0;
}