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| author | Eric Blake <eblake@redhat.com> | 2017-09-25 09:55:19 -0500 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2017-10-06 16:28:58 +0200 |
| commit | 3b5d4df0c6b52746c6194bd2ea65828822db8438 (patch) | |
| tree | 8acbcd8f5f56e08fd2d80c26cfb26fe8f948a721 | |
| parent | 9a46dba7b76f5198555819905d1d8235947ba98f (diff) | |
| download | qemu-3b5d4df0c6b52746c6194bd2ea65828822db8438.zip qemu-3b5d4df0c6b52746c6194bd2ea65828822db8438.tar.gz qemu-3b5d4df0c6b52746c6194bd2ea65828822db8438.tar.bz2 | |
dirty-bitmap: Change bdrv_get_dirty_locked() to take bytes
Half the callers were already scaling bytes to sectors; the other
half can eventually be simplified to use byte iteration. Both
callers were already using the result as a bool, so make that
explicit. Making the change also makes it easier for a future
dirty-bitmap patch to offload scaling over to the internal hbitmap.
Remember, asking whether a byte is dirty is effectively asking
whether the entire granularity containing the byte is dirty, since
we only track dirtiness by granularity.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | block/dirty-bitmap.c | 8 | ||||
| -rw-r--r-- | block/mirror.c | 3 | ||||
| -rw-r--r-- | include/block/dirty-bitmap.h | 4 | ||||
| -rw-r--r-- | migration/block.c | 3 |
4 files changed, 9 insertions, 9 deletions
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 8322e23..ad559c6 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -438,13 +438,13 @@ BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs) } /* Called within bdrv_dirty_bitmap_lock..unlock */ -int bdrv_get_dirty_locked(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, - int64_t sector) +bool bdrv_get_dirty_locked(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, + int64_t offset) { if (bitmap) { - return hbitmap_get(bitmap->bitmap, sector); + return hbitmap_get(bitmap->bitmap, offset >> BDRV_SECTOR_BITS); } else { - return 0; + return false; } } diff --git a/block/mirror.c b/block/mirror.c index c5212d2..545dfc5 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -361,8 +361,7 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s) int64_t next_offset = offset + nb_chunks * s->granularity; int64_t next_chunk = next_offset / s->granularity; if (next_offset >= s->bdev_length || - !bdrv_get_dirty_locked(source, s->dirty_bitmap, - next_offset >> BDRV_SECTOR_BITS)) { + !bdrv_get_dirty_locked(source, s->dirty_bitmap, next_offset)) { break; } if (test_bit(next_chunk, s->in_flight_bitmap)) { diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h index 757fc4c..9e39537 100644 --- a/include/block/dirty-bitmap.h +++ b/include/block/dirty-bitmap.h @@ -72,8 +72,8 @@ void bdrv_dirty_bitmap_set_persistance(BdrvDirtyBitmap *bitmap, /* Functions that require manual locking. */ void bdrv_dirty_bitmap_lock(BdrvDirtyBitmap *bitmap); void bdrv_dirty_bitmap_unlock(BdrvDirtyBitmap *bitmap); -int bdrv_get_dirty_locked(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, - int64_t sector); +bool bdrv_get_dirty_locked(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, + int64_t offset); void bdrv_set_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap, int64_t cur_sector, int64_t nr_sectors); void bdrv_reset_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap, diff --git a/migration/block.c b/migration/block.c index cbcadce..f5bcf55 100644 --- a/migration/block.c +++ b/migration/block.c @@ -535,7 +535,8 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds, blk_mig_unlock(); } bdrv_dirty_bitmap_lock(bmds->dirty_bitmap); - if (bdrv_get_dirty_locked(bs, bmds->dirty_bitmap, sector)) { + if (bdrv_get_dirty_locked(bs, bmds->dirty_bitmap, + sector * BDRV_SECTOR_SIZE)) { if (total_sectors - sector < BDRV_SECTORS_PER_DIRTY_CHUNK) { nr_sectors = total_sectors - sector; } else { |