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X-Received-From: 2a00:1450:4864:20::12a Subject: [Qemu-devel] [PATCH 2/4] vl: refactor -rtc option references 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: Paolo Bonzini , Artem Pisarenko Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDMRC_1 RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Improve code readability and prepare for fixing bug #1797033 Signed-off-by: Artem Pisarenko --- vl.c | 82 +++++++++++++++++++++++++++++++++++++++++-----------------------= ---- 1 file changed, 49 insertions(+), 33 deletions(-) diff --git a/vl.c b/vl.c index 4e25c78..3a1346f 100644 --- a/vl.c +++ b/vl.c @@ -147,8 +147,13 @@ bool enable_cpu_pm =3D false; int nb_nics; NICInfo nd_table[MAX_NICS]; int autostart; -static int rtc_utc =3D 1; -static int rtc_date_offset =3D -1; /* -1 means no change */ +static enum { + RTC_BASE_UTC, + RTC_BASE_LOCALTIME, + RTC_BASE_DATETIME, +} rtc_base_type =3D RTC_BASE_UTC; +static int rtc_host_datetime_offset =3D -1; /* valid only for host rtc_clo= ck and + rtc_base_type=3DRTC_BASE_DATE= TIME */ QEMUClockType rtc_clock; int vga_interface_type =3D VGA_NONE; static DisplayOptions dpy; @@ -782,26 +787,30 @@ void qemu_system_vmstop_request(RunState state) /***********************************************************/ /* real time host monotonic timer */ =20 -static time_t qemu_time(void) +static time_t qemu_timedate(void) { return qemu_clock_get_ms(QEMU_CLOCK_HOST) / 1000; } =20 /***********************************************************/ -/* host time/date access */ +/* RTC reference time/date access */ void qemu_get_timedate(struct tm *tm, int offset) { - time_t ti =3D qemu_time(); + time_t ti =3D qemu_timedate(); =20 ti +=3D offset; - if (rtc_date_offset =3D=3D -1) { - if (rtc_utc) - gmtime_r(&ti, tm); - else - localtime_r(&ti, tm); - } else { - ti -=3D rtc_date_offset; + + switch (rtc_base_type) { + case RTC_BASE_UTC: + gmtime_r(&ti, tm); + break; + case RTC_BASE_LOCALTIME: + localtime_r(&ti, tm); + break; + case RTC_BASE_DATETIME: + ti -=3D rtc_host_datetime_offset; gmtime_r(&ti, tm); + break; } } =20 @@ -809,23 +818,28 @@ int qemu_timedate_diff(struct tm *tm) { time_t seconds; =20 - if (rtc_date_offset =3D=3D -1) - if (rtc_utc) - seconds =3D mktimegm(tm); - else { - struct tm tmp =3D *tm; - tmp.tm_isdst =3D -1; /* use timezone to figure it out */ - seconds =3D mktime(&tmp); - } - else - seconds =3D mktimegm(tm) + rtc_date_offset; - - return seconds - qemu_time(); + switch (rtc_base_type) { + case RTC_BASE_UTC: + seconds =3D mktimegm(tm); + break; + case RTC_BASE_LOCALTIME: + { + struct tm tmp =3D *tm; + tmp.tm_isdst =3D -1; /* use timezone to figure it out */ + seconds =3D mktime(&tmp); + break; + } + case RTC_BASE_DATETIME: + seconds =3D mktimegm(tm) + rtc_host_datetime_offset; + break; + } + + return seconds - qemu_timedate(); } =20 -static void configure_rtc_date_offset(const char *startdate) +static void configure_rtc_host_datetime_offset(const char *startdate) { - time_t rtc_start_date; + time_t rtc_start_datetime; struct tm tm; =20 if (sscanf(startdate, "%d-%d-%dT%d:%d:%d", &tm.tm_year, &tm.tm_mon, @@ -841,15 +855,16 @@ static void configure_rtc_date_offset(const char *sta= rtdate) } tm.tm_year -=3D 1900; tm.tm_mon--; - rtc_start_date =3D mktimegm(&tm); - if (rtc_start_date =3D=3D -1) { + rtc_start_datetime =3D mktimegm(&tm); + if (rtc_start_datetime =3D=3D -1) { date_fail: - error_report("invalid date format"); + error_report("invalid datetime format"); error_printf("valid formats: " "'2006-06-17T16:01:21' or '2006-06-17'\n"); exit(1); } - rtc_date_offset =3D qemu_time() - rtc_start_date; + rtc_host_datetime_offset =3D (qemu_clock_get_ms(QEMU_CLOCK_HOST) / 100= 0) + - rtc_start_datetime; } =20 static void configure_rtc(QemuOpts *opts) @@ -859,15 +874,16 @@ static void configure_rtc(QemuOpts *opts) value =3D qemu_opt_get(opts, "base"); if (value) { if (!strcmp(value, "utc")) { - rtc_utc =3D 1; + rtc_base_type =3D RTC_BASE_UTC; } else if (!strcmp(value, "localtime")) { Error *blocker =3D NULL; - rtc_utc =3D 0; + rtc_base_type =3D RTC_BASE_LOCALTIME; error_setg(&blocker, QERR_REPLAY_NOT_SUPPORTED, "-rtc base=3Dlocaltime"); replay_add_blocker(blocker); } else { - configure_rtc_date_offset(value); + rtc_base_type =3D RTC_BASE_DATETIME; + configure_rtc_host_datetime_offset(value); } } value =3D qemu_opt_get(opts, "clock"); --=20 2.7.4