From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38050) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avlow-0000Uy-UQ for qemu-devel@nongnu.org; Thu, 28 Apr 2016 09:17:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1avlov-0005qI-Nv for qemu-devel@nongnu.org; Thu, 28 Apr 2016 09:17:30 -0400 From: Kevin Wolf Date: Thu, 28 Apr 2016 15:16:46 +0200 Message-Id: <1461849406-29743-18-git-send-email-kwolf@redhat.com> In-Reply-To: <1461849406-29743-1-git-send-email-kwolf@redhat.com> References: <1461849406-29743-1-git-send-email-kwolf@redhat.com> Subject: [Qemu-devel] [PATCH v2 17/17] block: Remove BlockDriver.bdrv_read/write List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: kwolf@redhat.com, mreitz@redhat.com, stefanha@redhat.com, famz@redhat.com, sw@weilnetz.de, qemu-devel@nongnu.org There are no block drivers left that implement the old .bdrv_read/write interface, so it can be removed now. This gets us rid of the corresponding emulation functions, too. Signed-off-by: Kevin Wolf --- block.c | 2 -- block/io.c | 92 ----------------------------------------------- include/block/block_int.h | 4 --- 3 files changed, 98 deletions(-) diff --git a/block.c b/block.c index d4939b4..78e1f15 100644 --- a/block.c +++ b/block.c @@ -218,8 +218,6 @@ void bdrv_get_full_backing_filename(BlockDriverState *bs, char *dest, size_t sz, void bdrv_register(BlockDriver *bdrv) { - bdrv_setup_io_funcs(bdrv); - QLIST_INSERT_HEAD(&bdrv_drivers, bdrv, list); } diff --git a/block/io.c b/block/io.c index 2f53636..6233174 100644 --- a/block/io.c +++ b/block/io.c @@ -34,12 +34,6 @@ #define NOT_DONE 0x7fffffff /* used while emulated sync operation in progress */ -static BlockAIOCB *bdrv_aio_readv_em(BlockDriverState *bs, - int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, - BlockCompletionFunc *cb, void *opaque); -static BlockAIOCB *bdrv_aio_writev_em(BlockDriverState *bs, - int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, - BlockCompletionFunc *cb, void *opaque); static BlockAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *qiov, @@ -117,18 +111,6 @@ void bdrv_io_limits_update_group(BlockDriverState *bs, const char *group) bdrv_io_limits_enable(bs, group); } -void bdrv_setup_io_funcs(BlockDriver *bdrv) -{ - /* bdrv_co_readv_em()/brdv_co_writev_em() work in terms of aio, so if - * the block driver lacks aio we need to emulate that. - */ - if (!bdrv->bdrv_aio_readv) { - /* add AIO emulation layer */ - bdrv->bdrv_aio_readv = bdrv_aio_readv_em; - bdrv->bdrv_aio_writev = bdrv_aio_writev_em; - } -} - void bdrv_refresh_limits(BlockDriverState *bs, Error **errp) { BlockDriver *drv = bs->drv; @@ -2148,80 +2130,6 @@ void bdrv_aio_cancel_async(BlockAIOCB *acb) /**************************************************************/ /* async block device emulation */ -typedef struct BlockAIOCBSync { - BlockAIOCB common; - QEMUBH *bh; - int ret; - /* vector translation state */ - QEMUIOVector *qiov; - uint8_t *bounce; - int is_write; -} BlockAIOCBSync; - -static const AIOCBInfo bdrv_em_aiocb_info = { - .aiocb_size = sizeof(BlockAIOCBSync), -}; - -static void bdrv_aio_bh_cb(void *opaque) -{ - BlockAIOCBSync *acb = opaque; - - if (!acb->is_write && acb->ret >= 0) { - qemu_iovec_from_buf(acb->qiov, 0, acb->bounce, acb->qiov->size); - } - qemu_vfree(acb->bounce); - acb->common.cb(acb->common.opaque, acb->ret); - qemu_bh_delete(acb->bh); - acb->bh = NULL; - qemu_aio_unref(acb); -} - -static BlockAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs, - int64_t sector_num, - QEMUIOVector *qiov, - int nb_sectors, - BlockCompletionFunc *cb, - void *opaque, - int is_write) - -{ - BlockAIOCBSync *acb; - - acb = qemu_aio_get(&bdrv_em_aiocb_info, bs, cb, opaque); - acb->is_write = is_write; - acb->qiov = qiov; - acb->bounce = qemu_try_blockalign(bs, qiov->size); - acb->bh = aio_bh_new(bdrv_get_aio_context(bs), bdrv_aio_bh_cb, acb); - - if (acb->bounce == NULL) { - acb->ret = -ENOMEM; - } else if (is_write) { - qemu_iovec_to_buf(acb->qiov, 0, acb->bounce, qiov->size); - acb->ret = bs->drv->bdrv_write(bs, sector_num, acb->bounce, nb_sectors); - } else { - acb->ret = bs->drv->bdrv_read(bs, sector_num, acb->bounce, nb_sectors); - } - - qemu_bh_schedule(acb->bh); - - return &acb->common; -} - -static BlockAIOCB *bdrv_aio_readv_em(BlockDriverState *bs, - int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, - BlockCompletionFunc *cb, void *opaque) -{ - return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 0); -} - -static BlockAIOCB *bdrv_aio_writev_em(BlockDriverState *bs, - int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, - BlockCompletionFunc *cb, void *opaque) -{ - return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 1); -} - - typedef struct BlockAIOCBCoroutine { BlockAIOCB common; BlockRequest req; diff --git a/include/block/block_int.h b/include/block/block_int.h index 0ef6f2c..22fbea4 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -127,10 +127,6 @@ struct BlockDriver { Error **errp); int (*bdrv_file_open)(BlockDriverState *bs, QDict *options, int flags, Error **errp); - int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num, - uint8_t *buf, int nb_sectors); - int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num, - const uint8_t *buf, int nb_sectors); void (*bdrv_close)(BlockDriverState *bs); int (*bdrv_create)(const char *filename, QemuOpts *opts, Error **errp); int (*bdrv_set_key)(BlockDriverState *bs, const char *key); -- 1.8.3.1