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dirty-bitmap: Switch bdrv_set_dirty() to bytes

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Both callers already had bytes available, but were scaling to
sectors.  Move the scaling to internal code.  In the case of
bdrv_aligned_pwritev(), we are now passing the exact offset
rather than a rounded sector-aligned value, but that's okay
as long as dirty bitmap widens start/bytes to granularity
boundaries.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Eric Blake 2017-09-25 09:55:25 -05:00 committed by Kevin Wolf
parent 49d741b504
commit 0fdf1a4f68
3 changed files with 7 additions and 8 deletions
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7
block/dirty-bitmap.c
View file

@ -628,10 +628,10 @@ void bdrv_dirty_bitmap_deserialize_finish(BdrvDirtyBitmap *bitmap)
hbitmap_deserialize_finish(bitmap->bitmap);
}
void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector,
int64_t nr_sectors)
void bdrv_set_dirty(BlockDriverState *bs, int64_t offset, int64_t bytes)
{
BdrvDirtyBitmap *bitmap;
int64_t end_sector = DIV_ROUND_UP(offset + bytes, BDRV_SECTOR_SIZE);
if (QLIST_EMPTY(&bs->dirty_bitmaps)) {
return;
@ -643,7 +643,8 @@ void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector,
continue;
}
assert(!bdrv_dirty_bitmap_readonly(bitmap));
hbitmap_set(bitmap->bitmap, cur_sector, nr_sectors);
hbitmap_set(bitmap->bitmap, offset >> BDRV_SECTOR_BITS,
end_sector - (offset >> BDRV_SECTOR_BITS));
}
bdrv_dirty_bitmaps_unlock(bs);
}

6
block/io.c
View file

@ -1334,7 +1334,6 @@ static int coroutine_fn bdrv_aligned_pwritev(BdrvChild *child,
bool waited;
int ret;
int64_t start_sector = offset >> BDRV_SECTOR_BITS;
int64_t end_sector = DIV_ROUND_UP(offset + bytes, BDRV_SECTOR_SIZE);
uint64_t bytes_remaining = bytes;
int max_transfer;
@ -1409,7 +1408,7 @@ static int coroutine_fn bdrv_aligned_pwritev(BdrvChild *child,
bdrv_debug_event(bs, BLKDBG_PWRITEV_DONE);
atomic_inc(&bs->write_gen);
bdrv_set_dirty(bs, start_sector, end_sector - start_sector);
bdrv_set_dirty(bs, offset, bytes);
stat64_max(&bs->wr_highest_offset, offset + bytes);
@ -2438,8 +2437,7 @@ int coroutine_fn bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset,
ret = 0;
out:
atomic_inc(&bs->write_gen);
bdrv_set_dirty(bs, req.offset >> BDRV_SECTOR_BITS,
req.bytes >> BDRV_SECTOR_BITS);
bdrv_set_dirty(bs, req.offset, req.bytes);
tracked_request_end(&req);
bdrv_dec_in_flight(bs);
return ret;

2
include/block/block_int.h
View file

@ -1028,7 +1028,7 @@ void blk_dev_eject_request(BlockBackend *blk, bool force);
bool blk_dev_is_tray_open(BlockBackend *blk);
bool blk_dev_is_medium_locked(BlockBackend *blk);
void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int64_t nr_sect);
void bdrv_set_dirty(BlockDriverState *bs, int64_t offset, int64_t bytes);
bool bdrv_requests_pending(BlockDriverState *bs);
void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out);