From patchwork Wed May 4 23:55:13 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Blake X-Patchwork-Id: 618721 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3r0ZlJ5Bngz9t3g for ; Thu, 5 May 2016 09:59:24 +1000 (AEST) Received: from localhost ([::1]:50851 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ay6hL-0008Cb-N2 for incoming@patchwork.ozlabs.org; Wed, 04 May 2016 19:59:19 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35068) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ay6eY-0002Hr-KY for qemu-devel@nongnu.org; Wed, 04 May 2016 19:56:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ay6eM-0004PD-SX for qemu-devel@nongnu.org; Wed, 04 May 2016 19:56:21 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56527) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ay6e3-00042v-1o; Wed, 04 May 2016 19:55:55 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 796F38F221; Wed, 4 May 2016 23:55:38 +0000 (UTC) Received: from red.redhat.com (ovpn-113-154.phx2.redhat.com [10.3.113.154]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u44NtUhX025795; Wed, 4 May 2016 19:55:38 -0400 From: Eric Blake To: qemu-devel@nongnu.org Date: Wed, 4 May 2016 17:55:13 -0600 Message-Id: <1462406126-22946-8-git-send-email-eblake@redhat.com> In-Reply-To: <1462406126-22946-1-git-send-email-eblake@redhat.com> References: <1462406126-22946-1-git-send-email-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v6 07/20] scsi-disk: Switch to byte-based aio block access X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, Paolo Bonzini , qemu-block@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Sector-based blk_aio_readv() and blk_aio_writev() should die; switch to byte-based blk_aio_preadv() and blk_aio_pwritev() instead. Signed-off-by: Eric Blake --- hw/scsi/scsi-disk.c | 31 +++++++++++++++---------------- 1 file changed, 15 insertions(+), 16 deletions(-) diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c index 1335392..5d98f7b 100644 --- a/hw/scsi/scsi-disk.c +++ b/hw/scsi/scsi-disk.c @@ -343,8 +343,9 @@ static void scsi_do_read(SCSIDiskReq *r, int ret) n = scsi_init_iovec(r, SCSI_DMA_BUF_SIZE); block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, n * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ); - r->req.aiocb = blk_aio_readv(s->qdev.conf.blk, r->sector, &r->qiov, n, - scsi_read_complete, r); + r->req.aiocb = blk_aio_preadv(s->qdev.conf.blk, + r->sector << BDRV_SECTOR_BITS, &r->qiov, + 0, scsi_read_complete, r); } done: @@ -504,7 +505,6 @@ static void scsi_write_data(SCSIRequest *req) { SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); - uint32_t n; /* No data transfer may already be in progress */ assert(r->req.aiocb == NULL); @@ -544,11 +544,11 @@ static void scsi_write_data(SCSIRequest *req) r->req.aiocb = dma_blk_write(s->qdev.conf.blk, r->req.sg, r->sector, scsi_dma_complete, r); } else { - n = r->qiov.size / 512; block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, - n * BDRV_SECTOR_SIZE, BLOCK_ACCT_WRITE); - r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, r->sector, &r->qiov, n, - scsi_write_complete, r); + r->qiov.size, BLOCK_ACCT_WRITE); + r->req.aiocb = blk_aio_pwritev(s->qdev.conf.blk, + r->sector << BDRV_SECTOR_BITS, &r->qiov, + 0, scsi_write_complete, r); } } @@ -1730,13 +1730,11 @@ static void scsi_write_same_complete(void *opaque, int ret) if (data->iov.iov_len) { block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, data->iov.iov_len, BLOCK_ACCT_WRITE); - /* blk_aio_write doesn't like the qiov size being different from - * nb_sectors, make sure they match. - */ qemu_iovec_init_external(&data->qiov, &data->iov, 1); - r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, data->sector, - &data->qiov, data->iov.iov_len / 512, - scsi_write_same_complete, data); + r->req.aiocb = blk_aio_pwritev(s->qdev.conf.blk, + data->sector << BDRV_SECTOR_BITS, + &data->qiov, 0, + scsi_write_same_complete, data); return; } @@ -1803,9 +1801,10 @@ static void scsi_disk_emulate_write_same(SCSIDiskReq *r, uint8_t *inbuf) scsi_req_ref(&r->req); block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, data->iov.iov_len, BLOCK_ACCT_WRITE); - r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, data->sector, - &data->qiov, data->iov.iov_len / 512, - scsi_write_same_complete, data); + r->req.aiocb = blk_aio_pwritev(s->qdev.conf.blk, + data->sector << BDRV_SECTOR_BITS, + &data->qiov, 0, + scsi_write_same_complete, data); } static void scsi_disk_emulate_write_data(SCSIRequest *req)