Signed-off-by: Lei Li <li...@linux.vnet.ibm.com>
---
qga/commands-posix.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++
qga/qapi-schema.json | 32 ++++++++++++++++++++++++++++
2 files changed, 89 insertions(+), 0 deletions(-)
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 190199d..7fff49a 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -121,6 +121,63 @@ struct HostTimeInfo *qmp_guest_get_time(Error **errp)
return host_time;
}
+void qmp_guest_set_time(bool has_seconds, int64_t seconds,
+ bool has_microseconds, int64_t microseconds,
+ bool has_utc_offset, int64_t utc_offset, Error **errp)
+{
+ int ret;
+ int status;
+ pid_t pid, rpid;
+ struct timeval tv;
+ HostTimeInfo *host_time;
+
+ if ((!has_seconds) && (!has_microseconds) && (!has_utc_offset)) {
+ host_time = get_host_time();
+ if (!host_time) {
+ error_set(errp, QERR_QGA_COMMAND_FAILED, "Failed to set guest
time");
+ return;
+ }
+ tv.tv_sec = host_time->seconds;
+ tv.tv_usec = host_time->microseconds;
+ } else if (has_seconds && has_microseconds && has_utc_offset) {
+ tv.tv_sec = (time_t) seconds + utc_offset;
+ tv.tv_usec = (time_t) microseconds;
+ } else {
+ error_set(errp, QERR_INVALID_PARAMETER, "parameter missing");
+ return;
+ }
+
+ ret = settimeofday(&tv, NULL);
+ if (ret < 0) {
+ error_set(errp, QERR_QGA_COMMAND_FAILED, strerror(errno));
+ return;
+ }
+
+ /* Set the Hardware Clock to the current System Time. */
+ pid = fork();
+ if (pid == 0) {
+ setsid();
+ reopen_fd_to_null(0);
+ reopen_fd_to_null(1);
+ reopen_fd_to_null(2);
+
+ execle("/sbin/hwclock", "hwclock", "-w", NULL, environ);
+ _exit(EXIT_FAILURE);
+ } else if (pid < 0) {
+ goto exit_err;
+ }
+
+ do {
+ rpid = waitpid(pid, &status, 0);
+ } while (rpid == -1 && errno == EINTR);
+ if (rpid == pid && WIFEXITED(status) && !WEXITSTATUS(status)) {
+ return;
+ }
+
+exit_err:
+ error_set(errp, QERR_UNDEFINED_ERROR);
+}
+
typedef struct GuestFileHandle {
uint64_t id;
FILE *fh;
diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
index 4a8b93c..4649b55 100644
--- a/qga/qapi-schema.json
+++ b/qga/qapi-schema.json
@@ -117,6 +117,38 @@
'returns': 'HostTimeInfo' }
##
+# @guest-set-time:
+#
+# Set guest time. If none arguments were given, will set
+# host time to guest.
+#
+# Right now, when a guest is paused or migrated to a file
+# then loaded from that file, the guest OS has no idea that
+# there was a big gap in the time. Depending on how long
+# the gap was, NTP might not be able to resynchronize the
+# guest.
+#
+# This command tries to set guest time based on the information
+# from host or an absolute value given by management app, and
+# set the Hardware Clock to the current System Time. This
+# will make it easier for a guest to resynchronize without
+# waiting for NTP.
+#
+# @seconds: #optional "seconds" time.
+#
+# @microseconds: #optional "microseconds" time.
+#
+# @utc-offset: #optional utc offset.
+#
+# Returns: Nothing on success.
+#
+# Since: 1.4
+##
+{ 'command': 'guest-set-time',
+ 'data': { '*seconds': 'int', '*microseconds': 'int',
+ '*utc-offset': 'int' } }
+
+##
# @GuestAgentCommandInfo:
#
# Information about guest agent commands.
--
1.7.7.6
