From 2c958923bc09b1faf2505a988b4b1c458580e9ac Mon Sep 17 00:00:00 2001 From: Michal Privoznik Date: Fri, 31 Jan 2014 11:29:51 +0100 Subject: qga: Don't require 'time' argument in guest-set-time command As the description to the guest-set-time states, the command is there to ease time synchronization after resume. If guest was suspended for longer period of time, its system time can go off so badly, that even NTP refuses to set it. That's why the command was invented: to give users chance to set the time (not necessarily 100% correct). However, there's is no real need for us to require users to pass an arbitrary time. Especially if we can read the correct value from RTC (boiling down to reading host's time). Hence this commit enables logic: guest-set-time() == guest-set-time($now_from_rtc) Signed-off-by: Michal Privoznik Reviewed-by: Eric Blake Signed-off-by: Michael Roth --- qga/commands-win32.c | 34 +++++++++++++++++++++++----------- 1 file changed, 23 insertions(+), 11 deletions(-) (limited to 'qga/commands-win32.c') diff --git a/qga/commands-win32.c b/qga/commands-win32.c index 50094ddfd3..0ee07b6e23 100644 --- a/qga/commands-win32.c +++ b/qga/commands-win32.c @@ -370,25 +370,37 @@ int64_t qmp_guest_get_time(Error **errp) return time_ns; } -void qmp_guest_set_time(int64_t time_ns, Error **errp) +void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp) { SYSTEMTIME ts; FILETIME tf; LONGLONG time; - 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) { + /* 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; + } - 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; + 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; + } } acquire_privilege(SE_SYSTEMTIME_NAME, errp); -- cgit v1.2.3