From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34541) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dpGHJ-0006Jh-Qg for qemu-devel@nongnu.org; Tue, 05 Sep 2017 12:00:46 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dpGHF-0000MQ-2c for qemu-devel@nongnu.org; Tue, 05 Sep 2017 12:00:41 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:42634 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dpGHE-0000LZ-OE for qemu-devel@nongnu.org; Tue, 05 Sep 2017 12:00:36 -0400 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v85Fwa2i118574 for ; Tue, 5 Sep 2017 12:00:36 -0400 Received: from e06smtp10.uk.ibm.com (e06smtp10.uk.ibm.com [195.75.94.106]) by mx0b-001b2d01.pphosted.com with ESMTP id 2csv20j01p-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 05 Sep 2017 12:00:35 -0400 Received: from localhost by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 5 Sep 2017 17:00:33 +0100 From: Greg Kurz Date: Tue, 5 Sep 2017 18:00:27 +0200 In-Reply-To: <20170905160027.15081-1-groug@kaod.org> References: <20170905160027.15081-1-groug@kaod.org> Message-Id: <20170905160027.15081-5-groug@kaod.org> Subject: [Qemu-devel] [PULL v2 4/4] virtfs: error out gracefully when mandatory suboptions are missing List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Maydell , Greg Kurz We internally convert -virtfs to -fsdev/-device. If the user doesn't provide the path or security_model suboptions, and the fsdev backend requires them, we hit an assertion when populating the internal -fsdev option: util/qemu-option.c:547: opt_set: Assertion `opt->str' failed. Aborted (core dumped) Let's test the suboption presence on the command line before trying to set it in the internal -fsdev option, and let the backend code error out gracefully (ie, like it already does when the user passes -fsdev on the command line). Reported-by: Thomas Huth Signed-off-by: Greg Kurz Reviewed-by: Thomas Huth --- vl.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/vl.c b/vl.c index 0b45e1b6fa31..e75757f9772e 100644 --- a/vl.c +++ b/vl.c @@ -3557,7 +3557,7 @@ int main(int argc, char **argv, char **envp) case QEMU_OPTION_virtfs: { QemuOpts *fsdev; QemuOpts *device; - const char *writeout, *sock_fd, *socket; + const char *writeout, *sock_fd, *socket, *path, *security_model; olist = qemu_find_opts("virtfs"); if (!olist) { @@ -3596,11 +3596,15 @@ int main(int argc, char **argv, char **envp) } qemu_opt_set(fsdev, "fsdriver", qemu_opt_get(opts, "fsdriver"), &error_abort); - qemu_opt_set(fsdev, "path", qemu_opt_get(opts, "path"), - &error_abort); - qemu_opt_set(fsdev, "security_model", - qemu_opt_get(opts, "security_model"), - &error_abort); + path = qemu_opt_get(opts, "path"); + if (path) { + qemu_opt_set(fsdev, "path", path, &error_abort); + } + security_model = qemu_opt_get(opts, "security_model"); + if (security_model) { + qemu_opt_set(fsdev, "security_model", security_model, + &error_abort); + } socket = qemu_opt_get(opts, "socket"); if (socket) { qemu_opt_set(fsdev, "socket", socket, &error_abort); -- 2.13.5