mirror of https://github.com/xemu-project/xemu.git
qga: add guest-set-time command
Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com> *added stub for w32 Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
parent
6912e6a94c
commit
a1bca57f75
|
@ -135,6 +135,61 @@ int64_t qmp_guest_get_time(Error **errp)
|
||||||
return time_ns;
|
return time_ns;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
void qmp_guest_set_time(int64_t time_ns, Error **errp)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
int status;
|
||||||
|
pid_t pid;
|
||||||
|
Error *local_err = NULL;
|
||||||
|
struct timeval tv;
|
||||||
|
|
||||||
|
/* year-2038 will overflow in case time_t is 32bit */
|
||||||
|
if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) {
|
||||||
|
error_setg(errp, "Time %" PRId64 " is too large", time_ns);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
tv.tv_sec = time_ns / 1000000000;
|
||||||
|
tv.tv_usec = (time_ns % 1000000000) / 1000;
|
||||||
|
|
||||||
|
ret = settimeofday(&tv, NULL);
|
||||||
|
if (ret < 0) {
|
||||||
|
error_setg_errno(errp, errno, "Failed to set time to guest");
|
||||||
|
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) {
|
||||||
|
error_setg_errno(errp, errno, "failed to create child process");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
ga_wait_child(pid, &status, &local_err);
|
||||||
|
if (error_is_set(&local_err)) {
|
||||||
|
error_propagate(errp, local_err);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!WIFEXITED(status)) {
|
||||||
|
error_setg(errp, "child process has terminated abnormally");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (WEXITSTATUS(status)) {
|
||||||
|
error_setg(errp, "hwclock failed to set hardware clock to system time");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
typedef struct GuestFileHandle {
|
typedef struct GuestFileHandle {
|
||||||
uint64_t id;
|
uint64_t id;
|
||||||
FILE *fh;
|
FILE *fh;
|
||||||
|
|
|
@ -284,6 +284,11 @@ int64_t qmp_guest_get_time(Error **errp)
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
void qmp_guest_set_time(int64_t time_ns, Error **errp)
|
||||||
|
{
|
||||||
|
error_set(errp, QERR_UNSUPPORTED);
|
||||||
|
}
|
||||||
|
|
||||||
/* register init/cleanup routines for stateful command groups */
|
/* register init/cleanup routines for stateful command groups */
|
||||||
void ga_command_state_init(GAState *s, GACommandState *cs)
|
void ga_command_state_init(GAState *s, GACommandState *cs)
|
||||||
{
|
{
|
||||||
|
|
|
@ -95,6 +95,32 @@
|
||||||
{ 'command': 'guest-get-time',
|
{ 'command': 'guest-get-time',
|
||||||
'returns': 'int' }
|
'returns': 'int' }
|
||||||
|
|
||||||
|
##
|
||||||
|
# @guest-set-time:
|
||||||
|
#
|
||||||
|
# Set guest time.
|
||||||
|
#
|
||||||
|
# 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 to the given value,
|
||||||
|
# then sets the Hardware Clock to the current System Time.
|
||||||
|
# This will make it easier for a guest to resynchronize
|
||||||
|
# without waiting for NTP.
|
||||||
|
#
|
||||||
|
# @time: time of nanoseconds, relative to the Epoch of
|
||||||
|
# 1970-01-01 in UTC.
|
||||||
|
#
|
||||||
|
# Returns: Nothing on success.
|
||||||
|
#
|
||||||
|
# Since: 1.5
|
||||||
|
##
|
||||||
|
{ 'command': 'guest-set-time',
|
||||||
|
'data': { 'time': 'int' } }
|
||||||
|
|
||||||
##
|
##
|
||||||
# @GuestAgentCommandInfo:
|
# @GuestAgentCommandInfo:
|
||||||
#
|
#
|
||||||
|
|
Loading…
Reference in New Issue