From patchwork Tue Feb 17 03:14:52 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Roth X-Patchwork-Id: 440439 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 243DB140180 for ; Tue, 17 Feb 2015 14:16:00 +1100 (AEDT) Received: from localhost ([::1]:43648 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YNYdi-0005IG-28 for incoming@patchwork.ozlabs.org; Mon, 16 Feb 2015 22:15:58 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51560) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YNYdH-0004j8-LN for qemu-devel@nongnu.org; Mon, 16 Feb 2015 22:15:33 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YNYdE-0004FQ-8N for qemu-devel@nongnu.org; Mon, 16 Feb 2015 22:15:31 -0500 Received: from e9.ny.us.ibm.com ([32.97.182.139]:59784) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YNYdE-0004F9-4a for qemu-devel@nongnu.org; Mon, 16 Feb 2015 22:15:28 -0500 Received: from /spool/local by e9.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 16 Feb 2015 22:15:26 -0500 Received: from b01cxnp22033.gho.pok.ibm.com (b01cxnp22033.gho.pok.ibm.com [9.57.198.23]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id 9713238C803B for ; Mon, 16 Feb 2015 22:10:42 -0500 (EST) Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by b01cxnp22033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t1H3FPg428901612 for ; Tue, 17 Feb 2015 03:15:25 GMT Received: from d01av01.pok.ibm.com (localhost [127.0.0.1]) by d01av01.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t1H3FPIr001597 for ; Mon, 16 Feb 2015 22:15:25 -0500 Received: from localhost ([9.80.110.147]) by d01av01.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id t1H3FOcM001508; Mon, 16 Feb 2015 22:15:25 -0500 From: Michael Roth To: qemu-devel@nongnu.org Date: Mon, 16 Feb 2015 21:14:52 -0600 Message-Id: <1424142892-7275-11-git-send-email-mdroth@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1424142892-7275-1-git-send-email-mdroth@linux.vnet.ibm.com> References: <1424142892-7275-1-git-send-email-mdroth@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15021703-0033-0000-0000-000001DE22E4 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 32.97.182.139 Cc: peter.maydell@linaro.org, Michal Privoznik Subject: [Qemu-devel] [PATCH 10/10] qemu-ga-win: Fail loudly on bare 'set-time' X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Michal Privoznik The command is not implemented correctly yet. The documentation allows to not pass any value to set, in which case the time is re-read from RTC. However, reading CMOS on Windows is not trivial to implement. So instead of pretending we've set the correct time, fail explicitly. Signed-off-by: Michal Privoznik Signed-off-by: Michael Roth --- qga/commands-win32.c | 44 ++++++++++++++++++++++---------------------- qga/qapi-schema.json | 5 ++++- 2 files changed, 26 insertions(+), 23 deletions(-) diff --git a/qga/commands-win32.c b/qga/commands-win32.c index 3344ec1..5219c75 100644 --- a/qga/commands-win32.c +++ b/qga/commands-win32.c @@ -625,31 +625,31 @@ void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp) FILETIME tf; LONGLONG time; - if (has_time) { - /* Okay, user passed a time to set. Validate it. */ - if (time_ns < 0 || time_ns / 100 > INT64_MAX - W32_FT_OFFSET) { - error_setg(errp, "Time %" PRId64 "is invalid", time_ns); - return; - } + if (!has_time) { + /* Unfortunately, Windows libraries don't provide an easy way to access + * RTC yet: + * + * https://msdn.microsoft.com/en-us/library/aa908981.aspx + */ + error_setg(errp, "Time argument is required on this platform"); + return; + } + + /* Validate time passed by user. */ + if (time_ns < 0 || time_ns / 100 > INT64_MAX - W32_FT_OFFSET) { + error_setg(errp, "Time %" PRId64 "is invalid", time_ns); + return; + } - time = time_ns / 100 + W32_FT_OFFSET; + time = time_ns / 100 + W32_FT_OFFSET; - tf.dwLowDateTime = (DWORD) time; - tf.dwHighDateTime = (DWORD) (time >> 32); + tf.dwLowDateTime = (DWORD) time; + tf.dwHighDateTime = (DWORD) (time >> 32); - if (!FileTimeToSystemTime(&tf, &ts)) { - error_setg(errp, "Failed to convert system time %d", - (int)GetLastError()); - return; - } - } else { - /* Otherwise read the time from RTC which contains the correct value. - * Hopefully. */ - GetSystemTime(&ts); - if (ts.wYear < 1601 || ts.wYear > 30827) { - error_setg(errp, "Failed to get time"); - return; - } + if (!FileTimeToSystemTime(&tf, &ts)) { + error_setg(errp, "Failed to convert system time %d", + (int)GetLastError()); + return; } acquire_privilege(SE_SYSTEMTIME_NAME, &local_err); diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json index b69cfe1..4bfc70d 100644 --- a/qga/qapi-schema.json +++ b/qga/qapi-schema.json @@ -121,7 +121,10 @@ # given value, then sets the Hardware Clock (RTC) to the # current System Time. This will make it easier for a guest # to resynchronize without waiting for NTP. If no @time is -# specified, then the time to set is read from RTC. +# specified, then the time to set is read from RTC. However, +# this may not be supported on all platforms (i.e. Windows). +# If that's the case users are advised to always pass a +# value. # # @time: #optional time of nanoseconds, relative to the Epoch # of 1970-01-01 in UTC.