From patchwork Wed Jun 13 07:46:55 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fam Zheng X-Patchwork-Id: 10461807 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 6FA566020F for ; Wed, 13 Jun 2018 07:48:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 67A5128A02 for ; Wed, 13 Jun 2018 07:48:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5C46A28A0C; Wed, 13 Jun 2018 07:48:34 +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=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, 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 F180E28A02 for ; Wed, 13 Jun 2018 07:48:33 +0000 (UTC) Received: from localhost ([::1]:60470 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fT0W9-0006cb-5X for patchwork-qemu-devel@patchwork.kernel.org; Wed, 13 Jun 2018 03:48:33 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44475) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fT0Ul-0005iU-PZ for qemu-devel@nongnu.org; Wed, 13 Jun 2018 03:47:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fT0Uk-0006lp-Ou for qemu-devel@nongnu.org; Wed, 13 Jun 2018 03:47:07 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:37090 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fT0Ug-0006h1-6A; Wed, 13 Jun 2018 03:47:02 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B215D4000D0B; Wed, 13 Jun 2018 07:47:01 +0000 (UTC) Received: from lemon.usersys.redhat.com (ovpn-12-100.pek2.redhat.com [10.72.12.100]) by smtp.corp.redhat.com (Postfix) with ESMTP id B1C2C20345E2; Wed, 13 Jun 2018 07:46:58 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Wed, 13 Jun 2018 15:46:55 +0800 Message-Id: <20180613074655.16289-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Wed, 13 Jun 2018 07:47:01 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Wed, 13 Jun 2018 07:47:01 +0000 (UTC) for IP:'10.11.54.6' DOMAIN:'int-mx06.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'famz@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH] nvme: Support image creation 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 , Fam Zheng , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Similar to the host_device's implementation, we check the requested length against the namespace size. Truncation is necessary to make qcow2 creation work. Signed-off-by: Fam Zheng --- block/nvme.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) diff --git a/block/nvme.c b/block/nvme.c index 6f71122bf5..ec3d18e790 100644 --- a/block/nvme.c +++ b/block/nvme.c @@ -21,6 +21,7 @@ #include "qemu/option.h" #include "qemu/vfio-helpers.h" #include "block/block_int.h" +#include "sysemu/block-backend.h" #include "trace.h" #include "block/nvme.h" @@ -1154,6 +1155,73 @@ static void nvme_unregister_buf(BlockDriverState *bs, void *host) qemu_vfio_dma_unmap(s->vfio, host); } +static QemuOptsList nvme_create_opts = { + .name = "nvme-create-opts", + .head = QTAILQ_HEAD_INITIALIZER(nvme_create_opts.head), + .desc = { + { + .name = BLOCK_OPT_SIZE, + .type = QEMU_OPT_SIZE, + .help = "Virtual disk size" + }, + { /* end of list */ } + } +}; + +static int coroutine_fn nvme_co_create_opts(const char *filename, QemuOpts *opts, + Error **errp) +{ + int ret = 0; + BlockDriverState *bs = NULL; + int64_t size; + + if (strncmp(filename, "nvme://", strlen("nvme://"))) { + error_setg(errp, "Invalid filename (must start with \"nvme://\")"); + ret = -EINVAL; + goto out; + } + + bs = bdrv_open(filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL, errp); + if (!bs) { + ret = -EINVAL; + goto out; + } + + size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0); + + if (size < 0 || bdrv_getlength(bs) < size) { + error_setg(errp, "Invalid image size"); + ret = -EINVAL; + } + +out: + bdrv_unref(bs); + /* Hold breath for a little while before letting image format creation run. + * The problem is when testing with Intel P3700, the controller doesn't + * like the immediate open after close, as a result, nvme_init() will fail. + * This works around that. + **/ + g_usleep(2000000); + return ret; +} + +static int nvme_truncate(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp) +{ + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Preallocation mode '%s' unsupported", + PreallocMode_str(prealloc)); + return -ENOTSUP; + } + + if (offset > nvme_getlength(bs)) { + error_setg(errp, "Cannot grow device files"); + return -EINVAL; + } + + return 0; +} + static BlockDriver bdrv_nvme = { .format_name = "nvme", .protocol_name = "nvme", @@ -1180,6 +1248,10 @@ static BlockDriver bdrv_nvme = { .bdrv_register_buf = nvme_register_buf, .bdrv_unregister_buf = nvme_unregister_buf, + + .create_opts = &nvme_create_opts, + .bdrv_co_create_opts = nvme_co_create_opts, + .bdrv_truncate = nvme_truncate, }; static void bdrv_nvme_init(void)