From 9896c8765fdd916844596c3e6929b3c641e930b1 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Fri, 3 Jun 2016 18:42:51 +0200 Subject: [PATCH] block: Prepare bdrv_aligned_pwritev() for byte-aligned requests Signed-off-by: Kevin Wolf Reviewed-by: Eric Blake Reviewed-by: Stefan Hajnoczi --- block/io.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/block/io.c b/block/io.c index e75bce263db9..b261cc6327c4 100644 --- a/block/io.c +++ b/block/io.c @@ -1249,11 +1249,9 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs, bool waited; int ret; - int64_t sector_num = offset >> BDRV_SECTOR_BITS; - unsigned int nb_sectors = bytes >> BDRV_SECTOR_BITS; + int64_t start_sector = offset >> BDRV_SECTOR_BITS; + int64_t end_sector = DIV_ROUND_UP(offset + bytes, BDRV_SECTOR_SIZE); - assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0); - assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0); assert(!qiov || bytes == qiov->size); assert((bs->open_flags & BDRV_O_NO_IO) == 0); assert(!(flags & ~BDRV_REQ_MASK)); @@ -1278,22 +1276,21 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs, /* Do nothing, write notifier decided to fail this request */ } else if (flags & BDRV_REQ_ZERO_WRITE) { bdrv_debug_event(bs, BLKDBG_PWRITEV_ZERO); - ret = bdrv_co_do_pwrite_zeroes(bs, sector_num << BDRV_SECTOR_BITS, - nb_sectors << BDRV_SECTOR_BITS, flags); + ret = bdrv_co_do_pwrite_zeroes(bs, offset, bytes, flags); } else { bdrv_debug_event(bs, BLKDBG_PWRITEV); ret = bdrv_driver_pwritev(bs, offset, bytes, qiov, flags); } bdrv_debug_event(bs, BLKDBG_PWRITEV_DONE); - bdrv_set_dirty(bs, sector_num, nb_sectors); + bdrv_set_dirty(bs, start_sector, end_sector - start_sector); if (bs->wr_highest_offset < offset + bytes) { bs->wr_highest_offset = offset + bytes; } if (ret >= 0) { - bs->total_sectors = MAX(bs->total_sectors, sector_num + nb_sectors); + bs->total_sectors = MAX(bs->total_sectors, end_sector); } return ret;