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[PULL 39/56] block/copy-before-write: initialize block-copy bitmap
From: |
Hanna Reitz |
Subject: |
[PULL 39/56] block/copy-before-write: initialize block-copy bitmap |
Date: |
Wed, 1 Sep 2021 17:16:02 +0200 |
From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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>
---
block/backup.c | 16 +++++++---------
block/copy-before-write.c | 4 ++++
2 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/block/backup.c b/block/backup.c
index 4869f1e5da..687d2882bc 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -233,18 +233,16 @@ static void backup_init_bcs_bitmap(BackupBlockJob *job)
BdrvDirtyBitmap *bcs_bitmap = block_copy_dirty_bitmap(job->bcs);
if (job->sync_mode == MIRROR_SYNC_MODE_BITMAP) {
+ bdrv_clear_dirty_bitmap(bcs_bitmap, NULL);
ret = bdrv_dirty_bitmap_merge_internal(bcs_bitmap, job->sync_bitmap,
NULL, true);
assert(ret);
- } else {
- if (job->sync_mode == MIRROR_SYNC_MODE_TOP) {
- /*
- * We can't hog the coroutine to initialize this thoroughly.
- * Set a flag and resume work when we are able to yield safely.
- */
- block_copy_set_skip_unallocated(job->bcs, true);
- }
- bdrv_set_dirty_bitmap(bcs_bitmap, 0, job->len);
+ } else if (job->sync_mode == MIRROR_SYNC_MODE_TOP) {
+ /*
+ * We can't hog the coroutine to initialize this thoroughly.
+ * Set a flag and resume work when we are able to yield safely.
+ */
+ block_copy_set_skip_unallocated(job->bcs, true);
}
estimate = bdrv_get_dirty_count(bcs_bitmap);
diff --git a/block/copy-before-write.c b/block/copy-before-write.c
index 1cefcade78..2efe098aae 100644
--- a/block/copy-before-write.c
+++ b/block/copy-before-write.c
@@ -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;
}
--
2.31.1
- [PULL 29/56] block/backup: move cluster size calculation to block-copy, (continued)
- [PULL 29/56] block/backup: move cluster size calculation to block-copy, Hanna Reitz, 2021/09/01
- [PULL 34/56] block/copy-before-write: introduce cbw_init(), Hanna Reitz, 2021/09/01
- [PULL 22/56] block: introduce blk_replace_bs, Hanna Reitz, 2021/09/01
- [PULL 31/56] block/copy-before-write: drop extra bdrv_unref on failure path, Hanna Reitz, 2021/09/01
- [PULL 30/56] block/copy-before-write: relax permission requirements when no parents, Hanna Reitz, 2021/09/01
- [PULL 33/56] block/copy-before-write: bdrv_cbw_append(): replace child at last, Hanna Reitz, 2021/09/01
- [PULL 38/56] block/copy-before-write: cbw_init(): use options, Hanna Reitz, 2021/09/01
- [PULL 36/56] block/copy-before-write: cbw_init(): use file child after attaching, Hanna Reitz, 2021/09/01
- [PULL 37/56] block/copy-before-write: bdrv_cbw_append(): drop unused compress arg, Hanna Reitz, 2021/09/01
- [PULL 35/56] block/copy-before-write: cbw_init(): rename variables, Hanna Reitz, 2021/09/01
- [PULL 39/56] block/copy-before-write: initialize block-copy bitmap,
Hanna Reitz <=
- [PULL 40/56] block/block-copy: make setting progress optional, Hanna Reitz, 2021/09/01
- [PULL 41/56] block/copy-before-write: make public block driver, Hanna Reitz, 2021/09/01
- [PULL 43/56] python/qemu/machine.py: refactor _qemu_args(), Hanna Reitz, 2021/09/01
- [PULL 42/56] qapi: publish copy-before-write filter, Hanna Reitz, 2021/09/01
- [PULL 44/56] python/qemu/machine: QEMUMachine: improve qmp() method, Hanna Reitz, 2021/09/01
- [PULL 45/56] python:QEMUMachine: template typing for self returning methods, Hanna Reitz, 2021/09/01
- [PULL 46/56] iotests/222: fix pylint and mypy complains, Hanna Reitz, 2021/09/01
- [PULL 47/56] iotests/222: constantly use single quotes for strings, Hanna Reitz, 2021/09/01