From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51243) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XWguQ-0000k6-Tv for qemu-devel@nongnu.org; Wed, 24 Sep 2014 03:22:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XWguK-0005gV-K4 for qemu-devel@nongnu.org; Wed, 24 Sep 2014 03:22:42 -0400 Received: from mx1.redhat.com ([209.132.183.28]:64709) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XWguK-0005fi-CO for qemu-devel@nongnu.org; Wed, 24 Sep 2014 03:22:36 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s8O7MSH8018868 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Wed, 24 Sep 2014 03:22:30 -0400 From: Fam Zheng Date: Wed, 24 Sep 2014 15:21:49 +0800 Message-Id: <1411543312-6511-12-git-send-email-famz@redhat.com> In-Reply-To: <1411543312-6511-1-git-send-email-famz@redhat.com> References: <1411543312-6511-1-git-send-email-famz@redhat.com> Subject: [Qemu-devel] [PATCH v4 11/14] virtio-scsi: Two stages processing of cmd request List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, pbonzini@redhat.com, stefanha@redhat.com Mechanical change, in preparation for bdrv_io_plug/bdrv_io_unplug. Signed-off-by: Fam Zheng --- hw/scsi/virtio-scsi-dataplane.c | 4 +++- hw/scsi/virtio-scsi.c | 20 ++++++++++++-------- include/hw/virtio/virtio-scsi.h | 3 ++- 3 files changed, 17 insertions(+), 10 deletions(-) diff --git a/hw/scsi/virtio-scsi-dataplane.c b/hw/scsi/virtio-scsi-dataplane.c index acbf622..11f5705 100644 --- a/hw/scsi/virtio-scsi-dataplane.c +++ b/hw/scsi/virtio-scsi-dataplane.c @@ -126,7 +126,9 @@ static void virtio_scsi_iothread_handle_cmd(EventNotifier *notifier) event_notifier_test_and_clear(notifier); while ((req = virtio_scsi_pop_req_vring(s, vring))) { - virtio_scsi_handle_cmd_req(s, req); + if (virtio_scsi_handle_cmd_req_prepare(s, req)) { + virtio_scsi_handle_cmd_req_submit(s, req); + } } } diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index 57efe65..6cf070f 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -449,10 +449,9 @@ static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req) virtio_scsi_complete_cmd_req(req); } -void virtio_scsi_handle_cmd_req(VirtIOSCSI *s, VirtIOSCSIReq *req) +bool virtio_scsi_handle_cmd_req_prepare(VirtIOSCSI *s, VirtIOSCSIReq *req) { VirtIOSCSICommon *vs = &s->parent_obj; - int n; SCSIDevice *d; int rc; @@ -464,14 +463,14 @@ void virtio_scsi_handle_cmd_req(VirtIOSCSI *s, VirtIOSCSIReq *req) } else { virtio_scsi_bad_req(); } - return; + return false; } d = virtio_scsi_device_find(s, req->req.cmd.lun); if (!d) { req->resp.cmd.response = VIRTIO_SCSI_S_BAD_TARGET; virtio_scsi_complete_cmd_req(req); - return; + return false; } if (s->dataplane_started && bdrv_get_aio_context(d->conf.bs) != s->ctx) { aio_context_acquire(s->ctx); @@ -487,11 +486,14 @@ void virtio_scsi_handle_cmd_req(VirtIOSCSI *s, VirtIOSCSIReq *req) req->sreq->cmd.xfer > req->qsgl.size)) { req->resp.cmd.response = VIRTIO_SCSI_S_OVERRUN; virtio_scsi_complete_cmd_req(req); - return; + return false; } + return true; +} - n = scsi_req_enqueue(req->sreq); - if (n) { +void virtio_scsi_handle_cmd_req_submit(VirtIOSCSI *s, VirtIOSCSIReq *req) +{ + if (scsi_req_enqueue(req->sreq)) { scsi_req_continue(req->sreq); } } @@ -507,7 +509,9 @@ static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq) return; } while ((req = virtio_scsi_pop_req(s, vq))) { - virtio_scsi_handle_cmd_req(s, req); + if (virtio_scsi_handle_cmd_req_prepare(s, req)) { + virtio_scsi_handle_cmd_req_submit(s, req); + } } } diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h index 1a6a919..1cc759a 100644 --- a/include/hw/virtio/virtio-scsi.h +++ b/include/hw/virtio/virtio-scsi.h @@ -256,7 +256,8 @@ void virtio_scsi_common_realize(DeviceState *dev, Error **errp, void virtio_scsi_common_unrealize(DeviceState *dev, Error **errp); void virtio_scsi_handle_ctrl_req(VirtIOSCSI *s, VirtIOSCSIReq *req); -void virtio_scsi_handle_cmd_req(VirtIOSCSI *s, VirtIOSCSIReq *req); +bool virtio_scsi_handle_cmd_req_prepare(VirtIOSCSI *s, VirtIOSCSIReq *req); +void virtio_scsi_handle_cmd_req_submit(VirtIOSCSI *s, VirtIOSCSIReq *req); VirtIOSCSIReq *virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq); void virtio_scsi_free_req(VirtIOSCSIReq *req); void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev, -- 1.9.3