From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48249) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bFkRE-0002Np-U1 for qemu-devel@nongnu.org; Wed, 22 Jun 2016 11:51:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bFkR6-0002AU-Gb for qemu-devel@nongnu.org; Wed, 22 Jun 2016 11:51:35 -0400 From: Eric Blake Date: Wed, 22 Jun 2016 09:51:00 -0600 Message-Id: <1466610674-23157-4-git-send-email-eblake@redhat.com> In-Reply-To: <1466610674-23157-1-git-send-email-eblake@redhat.com> References: <1466610674-23157-1-git-send-email-eblake@redhat.com> Subject: [Qemu-devel] [PATCH 03/17] block: Switch BlockRequest to byte-based List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, kwolf@redhat.com, Stefan Hajnoczi , Fam Zheng , Max Reitz BlockRequest is the internal struct used by bdrv_aio_*. At the moment, all such calls were sector-based, but we will eventually convert to byte-based; start by changing the internal variables to be byte-based. No change to behavior, although the read and write code can now go byte-based through more of the stack. Signed-off-by: Eric Blake --- block/io.c | 64 +++++++++++++++++++++++++++++++------------------------------- 1 file changed, 32 insertions(+), 32 deletions(-) diff --git a/block/io.c b/block/io.c index 305e5c5..d442ce7 100644 --- a/block/io.c +++ b/block/io.c @@ -33,14 +33,13 @@ #define NOT_DONE 0x7fffffff /* used while emulated sync operation in progress */ -static BlockAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs, - int64_t sector_num, - QEMUIOVector *qiov, - int nb_sectors, - BdrvRequestFlags flags, - BlockCompletionFunc *cb, - void *opaque, - bool is_write); +static BlockAIOCB *bdrv_co_aio_prw_vector(BlockDriverState *bs, + int64_t offset, + QEMUIOVector *qiov, + BdrvRequestFlags flags, + BlockCompletionFunc *cb, + void *opaque, + bool is_write); static void coroutine_fn bdrv_co_do_rw(void *opaque); static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int count, BdrvRequestFlags flags); @@ -2010,8 +2009,9 @@ BlockAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, { trace_bdrv_aio_readv(bs, sector_num, nb_sectors, opaque); - return bdrv_co_aio_rw_vector(bs, sector_num, qiov, nb_sectors, 0, - cb, opaque, false); + assert(nb_sectors << BDRV_SECTOR_BITS == qiov->size); + return bdrv_co_aio_prw_vector(bs, sector_num << BDRV_SECTOR_BITS, qiov, 0, + cb, opaque, false); } BlockAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, @@ -2020,8 +2020,9 @@ BlockAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, { trace_bdrv_aio_writev(bs, sector_num, nb_sectors, opaque); - return bdrv_co_aio_rw_vector(bs, sector_num, qiov, nb_sectors, 0, - cb, opaque, true); + assert(nb_sectors << BDRV_SECTOR_BITS == qiov->size); + return bdrv_co_aio_prw_vector(bs, sector_num << BDRV_SECTOR_BITS, qiov, 0, + cb, opaque, true); } void bdrv_aio_cancel(BlockAIOCB *acb) @@ -2057,8 +2058,8 @@ typedef struct BlockRequest { union { /* Used during read, write, trim */ struct { - int64_t sector; - int nb_sectors; + int64_t offset; + int bytes; int flags; QEMUIOVector *qiov; }; @@ -2122,24 +2123,23 @@ static void coroutine_fn bdrv_co_do_rw(void *opaque) BlockDriverState *bs = acb->common.bs; if (!acb->is_write) { - acb->req.error = bdrv_co_do_readv(bs, acb->req.sector, - acb->req.nb_sectors, acb->req.qiov, acb->req.flags); + acb->req.error = bdrv_co_preadv(bs, acb->req.offset, + acb->req.qiov->size, acb->req.qiov, acb->req.flags); } else { - acb->req.error = bdrv_co_do_writev(bs, acb->req.sector, - acb->req.nb_sectors, acb->req.qiov, acb->req.flags); + acb->req.error = bdrv_co_pwritev(bs, acb->req.offset, + acb->req.qiov->size, acb->req.qiov, acb->req.flags); } bdrv_co_complete(acb); } -static BlockAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs, - int64_t sector_num, - QEMUIOVector *qiov, - int nb_sectors, - BdrvRequestFlags flags, - BlockCompletionFunc *cb, - void *opaque, - bool is_write) +static BlockAIOCB *bdrv_co_aio_prw_vector(BlockDriverState *bs, + int64_t offset, + QEMUIOVector *qiov, + BdrvRequestFlags flags, + BlockCompletionFunc *cb, + void *opaque, + bool is_write) { Coroutine *co; BlockAIOCBCoroutine *acb; @@ -2147,8 +2147,7 @@ static BlockAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs, acb = qemu_aio_get(&bdrv_em_co_aiocb_info, bs, cb, opaque); acb->need_bh = true; acb->req.error = -EINPROGRESS; - acb->req.sector = sector_num; - acb->req.nb_sectors = nb_sectors; + acb->req.offset = offset; acb->req.qiov = qiov; acb->req.flags = flags; acb->is_write = is_write; @@ -2193,8 +2192,8 @@ static void coroutine_fn bdrv_aio_discard_co_entry(void *opaque) BlockAIOCBCoroutine *acb = opaque; BlockDriverState *bs = acb->common.bs; - acb->req.error = bdrv_co_pdiscard(bs, acb->req.sector << BDRV_SECTOR_BITS, - acb->req.nb_sectors << BDRV_SECTOR_BITS); + acb->req.error = bdrv_co_pdiscard(bs, acb->req.offset, + acb->req.qiov->size); bdrv_co_complete(acb); } @@ -2204,14 +2203,15 @@ BlockAIOCB *bdrv_aio_discard(BlockDriverState *bs, { Coroutine *co; BlockAIOCBCoroutine *acb; + QEMUIOVector qiov = { .size = nb_sectors << BDRV_SECTOR_BITS, }; trace_bdrv_aio_discard(bs, sector_num, nb_sectors, opaque); acb = qemu_aio_get(&bdrv_em_co_aiocb_info, bs, cb, opaque); acb->need_bh = true; acb->req.error = -EINPROGRESS; - acb->req.sector = sector_num; - acb->req.nb_sectors = nb_sectors; + acb->req.offset = sector_num << BDRV_SECTOR_BITS; + acb->req.qiov = &qiov; co = qemu_coroutine_create(bdrv_aio_discard_co_entry); qemu_coroutine_enter(co, acb); -- 2.5.5