Thanks to recent cleanups, most callers were scaling a return value
of sectors into bytes (the exception, in qcow2-bitmap, will be
converted to byte-based iteration later). Update the interface to
do the scaling internally instead.
In qcow2-bitmap, the code was specifically checking for an error
to be -1; it is more robust to treat all negative values as an
error, but at the same time it is also easy enough to ensure we
return -1 (and not -512) on error.
Signed-off-by: Eric Blake <ebl...@redhat.com>
---
v7: return -1, not -512; and fix qcow2-bitmap to check all negatives [Kevin]
v5-v6: no change
v4: rebase to persistent bitmap
v3: no change
v2: no change
---
block/backup.c | 2 +-
block/dirty-bitmap.c | 3 ++-
block/mirror.c | 8 ++++----
block/qcow2-bitmap.c | 2 +-
4 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/block/backup.c b/block/backup.c
index ac9c018717..06ddbfd03d 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -375,7 +375,7 @@ static int coroutine_fn
backup_run_incremental(BackupBlockJob *job)
dbi = bdrv_dirty_iter_new(job->sync_bitmap);
/* Find the next dirty sector(s) */
- while ((offset = bdrv_dirty_iter_next(dbi) * BDRV_SECTOR_SIZE) >= 0) {
+ while ((offset = bdrv_dirty_iter_next(dbi)) >= 0) {
cluster = offset / job->cluster_size;
/* Fake progress updates for any clusters we skipped */
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index d50c46621d..49229fd501 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -508,7 +508,8 @@ void bdrv_dirty_iter_free(BdrvDirtyBitmapIter *iter)
int64_t bdrv_dirty_iter_next(BdrvDirtyBitmapIter *iter)
{
- return hbitmap_iter_next(&iter->hbi);
+ int64_t ret = hbitmap_iter_next(&iter->hbi);
+ return ret < 0 ? -1 : ret * BDRV_SECTOR_SIZE;
}
/* Called within bdrv_dirty_bitmap_lock..unlock */
diff --git a/block/mirror.c b/block/mirror.c
index 0b063b3c20..77bf5aa3a4 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -336,10 +336,10 @@ static uint64_t coroutine_fn
mirror_iteration(MirrorBlockJob *s)
int max_io_bytes = MAX(s->buf_size / MAX_IN_FLIGHT, MAX_IO_BYTES);
bdrv_dirty_bitmap_lock(s->dirty_bitmap);
- offset = bdrv_dirty_iter_next(s->dbi) * BDRV_SECTOR_SIZE;
+ offset = bdrv_dirty_iter_next(s->dbi);
if (offset < 0) {
bdrv_set_dirty_iter(s->dbi, 0);
- offset = bdrv_dirty_iter_next(s->dbi) * BDRV_SECTOR_SIZE;
+ offset = bdrv_dirty_iter_next(s->dbi);
trace_mirror_restart_iter(s, bdrv_get_dirty_count(s->dirty_bitmap) *
BDRV_SECTOR_SIZE);
assert(offset >= 0);
@@ -370,11 +370,11 @@ static uint64_t coroutine_fn
mirror_iteration(MirrorBlockJob *s)
break;
}
- next_dirty = bdrv_dirty_iter_next(s->dbi) * BDRV_SECTOR_SIZE;
+ next_dirty = bdrv_dirty_iter_next(s->dbi);
if (next_dirty > next_offset || next_dirty < 0) {
/* The bitmap iterator's cache is stale, refresh it */
bdrv_set_dirty_iter(s->dbi, next_offset);
- next_dirty = bdrv_dirty_iter_next(s->dbi) * BDRV_SECTOR_SIZE;
+ next_dirty = bdrv_dirty_iter_next(s->dbi);
}
assert(next_dirty == next_offset);
nb_chunks++;
diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c
index 44329fc74f..b09010b1d3 100644
--- a/block/qcow2-bitmap.c
+++ b/block/qcow2-bitmap.c
@@ -1109,7 +1109,7 @@ static uint64_t *store_bitmap_data(BlockDriverState *bs,
sbc = limit >> BDRV_SECTOR_BITS;
assert(DIV_ROUND_UP(bm_size, limit) == tb_size);
- while ((sector = bdrv_dirty_iter_next(dbi)) != -1) {
+ while ((sector = bdrv_dirty_iter_next(dbi) >> BDRV_SECTOR_BITS) >= 0) {
uint64_t cluster = sector / sbc;
uint64_t end, write_size;
int64_t off;
--
2.13.5
