From patchwork Wed Sep 21 16:57:20 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kurz X-Patchwork-Id: 9343943 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C4466607D4 for ; Wed, 21 Sep 2016 16:58:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C4FB32A808 for ; Wed, 21 Sep 2016 16:58:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B89582A80B; Wed, 21 Sep 2016 16:58:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 19D232A808 for ; Wed, 21 Sep 2016 16:58:12 +0000 (UTC) Received: from localhost ([::1]:44986 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bmkqZ-0005lr-3c for patchwork-qemu-devel@patchwork.kernel.org; Wed, 21 Sep 2016 12:58:11 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39564) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bmkpz-0005hs-Ez for qemu-devel@nongnu.org; Wed, 21 Sep 2016 12:57:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bmkpv-0002zE-AW for qemu-devel@nongnu.org; Wed, 21 Sep 2016 12:57:34 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:42106 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bmkpv-0002z5-5i for qemu-devel@nongnu.org; Wed, 21 Sep 2016 12:57:31 -0400 Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u8LGrMfW073144 for ; Wed, 21 Sep 2016 12:57:30 -0400 Received: from e34.co.us.ibm.com (e34.co.us.ibm.com [32.97.110.152]) by mx0a-001b2d01.pphosted.com with ESMTP id 25kkqbdh4g-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Wed, 21 Sep 2016 12:57:30 -0400 Received: from localhost by e34.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 21 Sep 2016 10:57:25 -0600 Received: from b03cxnp07028.gho.boulder.ibm.com (b03cxnp07028.gho.boulder.ibm.com [9.17.130.15]) by d03dlp02.boulder.ibm.com (Postfix) with ESMTP id 300063E4004C; Wed, 21 Sep 2016 10:57:24 -0600 (MDT) Received: from b03ledav006.gho.boulder.ibm.com (b03ledav006.gho.boulder.ibm.com [9.17.130.237]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u8LGvOCI15270364; Wed, 21 Sep 2016 09:57:24 -0700 Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7CCF0C604C; Wed, 21 Sep 2016 10:57:23 -0600 (MDT) Received: from [192.168.66.108] (unknown [9.83.153.110]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP id 7F44EC6043; Wed, 21 Sep 2016 10:57:21 -0600 (MDT) From: Greg Kurz To: qemu-devel@nongnu.org Date: Wed, 21 Sep 2016 18:57:20 +0200 In-Reply-To: <147447700612.30952.9420141963781948805.stgit@bahia> References: <147447700612.30952.9420141963781948805.stgit@bahia> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16092116-0016-0000-0000-000004BF189E X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00005798; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000185; SDB=6.00759917; UDB=6.00361360; IPR=6.00534336; BA=6.00004744; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00012740; XFM=3.00000011; UTC=2016-09-21 16:57:26 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16092116-0017-0000-0000-0000332595E7 Message-Id: <147447704092.30952.7983028961569052217.stgit@bahia> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-09-21_09:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=3 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1609020000 definitions=main-1609210307 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH v2 4/9] virtio-blk: handle virtio_blk_handle_request() errors 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: Kevin Wolf , "Michael S. Tsirkin" , Jason Wang , Greg Kurz , Max Reitz , "Aneesh Kumar K.V" , Stefan Hajnoczi , Cornelia Huck , Paolo Bonzini Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP All these errors are caused by a buggy guest: let's switch the device to the broken state instead of terminating QEMU. Signed-off-by: Greg Kurz Reviewed-by: Cornelia Huck --- v2: - added a out_err: label in virtio_blk_handle_vq() --- hw/block/virtio-blk.c | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-) diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index 09579968ad89..9865fa6ca3c0 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -468,30 +468,32 @@ static bool virtio_blk_sect_range_ok(VirtIOBlock *dev, return true; } -static void virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) +static int virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) { uint32_t type; struct iovec *in_iov = req->elem.in_sg; struct iovec *iov = req->elem.out_sg; unsigned in_num = req->elem.in_num; unsigned out_num = req->elem.out_num; + VirtIOBlock *s = req->dev; + VirtIODevice *vdev = VIRTIO_DEVICE(s); if (req->elem.out_num < 1 || req->elem.in_num < 1) { - error_report("virtio-blk missing headers"); - exit(1); + virtio_error(vdev, "virtio-blk missing headers"); + return -1; } if (unlikely(iov_to_buf(iov, out_num, 0, &req->out, sizeof(req->out)) != sizeof(req->out))) { - error_report("virtio-blk request outhdr too short"); - exit(1); + virtio_error(vdev, "virtio-blk request outhdr too short"); + return -1; } iov_discard_front(&iov, &out_num, sizeof(req->out)); if (in_iov[in_num - 1].iov_len < sizeof(struct virtio_blk_inhdr)) { - error_report("virtio-blk request inhdr too short"); - exit(1); + virtio_error(vdev, "virtio-blk request inhdr too short"); + return -1; } /* We always touch the last byte, so just see how big in_iov is. */ @@ -529,7 +531,7 @@ static void virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) block_acct_invalid(blk_get_stats(req->dev->blk), is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ); virtio_blk_free_request(req); - return; + return 0; } block_acct_start(blk_get_stats(req->dev->blk), @@ -576,6 +578,7 @@ static void virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); virtio_blk_free_request(req); } + return 0; } void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq) @@ -586,13 +589,16 @@ void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq) blk_io_plug(s->blk); while ((req = virtio_blk_get_request(s, vq))) { - virtio_blk_handle_request(req, &mrb); + if (virtio_blk_handle_request(req, &mrb)) { + goto out_err; + } } if (mrb.num_reqs) { virtio_blk_submit_multireq(s->blk, &mrb); } +out_err: blk_io_unplug(s->blk); } @@ -625,7 +631,9 @@ static void virtio_blk_dma_restart_bh(void *opaque) while (req) { VirtIOBlockReq *next = req->next; - virtio_blk_handle_request(req, &mrb); + if (virtio_blk_handle_request(req, &mrb)) { + return; + } req = next; }