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block/block-copy: block_copy_state_new(): add bitmap parameter

Browse source 
This will be used in the following commit to bring "incremental" mode
to copy-before-write filter.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220303194349.2304213-4-vsementsov@virtuozzo.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2022-03-03 20:43:36 +01:00 committed by Hanna Reitz
parent 34ffacb7f4
commit 1f7252e868
3 changed files with 15 additions and 2 deletions
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14
block/block-copy.c
View file

@ -384,8 +384,10 @@ static int64_t block_copy_calculate_cluster_size(BlockDriverState *target,
}
BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
const BdrvDirtyBitmap *bitmap,
Error **errp)
{
ERRP_GUARD();
BlockCopyState *s;
int64_t cluster_size;
BdrvDirtyBitmap *copy_bitmap;
@ -402,7 +404,17 @@ BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
return NULL;
}
bdrv_disable_dirty_bitmap(copy_bitmap);
bdrv_set_dirty_bitmap(copy_bitmap, 0, bdrv_dirty_bitmap_size(copy_bitmap));
if (bitmap) {
if (!bdrv_merge_dirty_bitmap(copy_bitmap, bitmap, NULL, errp)) {
error_prepend(errp, "Failed to merge bitmap '%s' to internal "
"copy-bitmap: ", bdrv_dirty_bitmap_name(bitmap));
bdrv_release_dirty_bitmap(copy_bitmap);
return NULL;
}
} else {
bdrv_set_dirty_bitmap(copy_bitmap, 0,
bdrv_dirty_bitmap_size(copy_bitmap));
}
/*
* If source is in backing chain of target assume that target is going to be

2
block/copy-before-write.c
View file

@ -170,7 +170,7 @@ static int cbw_open(BlockDriverState *bs, QDict *options, int flags,
((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) &
bs->file->bs->supported_zero_flags);
s->bcs = block_copy_state_new(bs->file, s->target, errp);
s->bcs = block_copy_state_new(bs->file, s->target, NULL, errp);
if (!s->bcs) {
error_prepend(errp, "Cannot create block-copy-state: ");
return -EINVAL;

1
include/block/block-copy.h
View file

@ -25,6 +25,7 @@ typedef struct BlockCopyState BlockCopyState;
typedef struct BlockCopyCallState BlockCopyCallState;
BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
const BdrvDirtyBitmap *bitmap,
Error **errp);
/* Function should be called prior any actual copy request */