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tools: acrnd: Stop all vms when SOS shutdown/reboot

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When SOS shutdown/reboot, systemd will send SIGTERM to acrnd. We should catch up
this signal and stop all vms gracefully.

BTW, this path also fix the following error when stop acrnd service by removing
ExecStop config. Systemd will send SIGTERM signal to process by default.

systemd[9378]: acrnd.service: Failed to execute command: No such file or directory
systemd[9378]: acrnd.service: Failed at step EXEC spawning /usr/bin/killall: No such file or directory
-- Subject: Process /usr/bin/killall could not be executed
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- The process /usr/bin/killall could not be executed and failed.
--
-- The error number returned by this process is 2.

Tracked-On: #1563
Signed-off-by: Kaige Fu <kaige.fu@intel.com>
Acked-by: Yan, Like <like.yan@intel.com>
This commit is contained in:
Kaige Fu 2018-10-19 13:29:52 +00:00 committed by wenlingz
parent 7b06be9e2c
commit d29937374a
2 changed files with 42 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
tools/acrn-manager/acrnd.c
View File

@ -5,6 +5,7 @@
#include <time.h>
#include <pthread.h>
#include <signal.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <stdlib.h>
@ -39,6 +40,10 @@ static pthread_mutex_t work_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_mutex_t acrnd_stop_mutex = PTHREAD_MUTEX_INITIALIZER;
static unsigned int acrnd_stop_timeout;
static int sigterm = 0; /* Exit acrnd when recevied SIGTERM and stop all vms */
#define VMS_STOP_TIMEOUT 20 /* Wait VMS_STOP_TIMEOUT sec to stop all vms */
/* acrnd_add_work(), add a worker function.
* @func, the worker function, will be called with work_mutex hold.
* @sec, when add a @func(), after @sec seconds @func() will be called.
@ -256,6 +261,23 @@ static int active_all_vms(void)
return ret ? -1 : 0;
}
static void stop_all_vms(void)
{
struct vmmngr_struct *vm;
int err;
vmmngr_update();
LIST_FOREACH(vm, &vmmngr_head, list) {
err = stop_vm(vm->name);
if (err != 0) {
fprintf(stderr, "Fail to send stop cmd to vm %s\n", vm->name);
} else {
printf("Send stop cmd to vm %s successfully\n", vm->name);
}
}
}
static int wakeup_suspended_vms(unsigned wakeup_reason)
{
struct vmmngr_struct *vm;
@ -582,6 +604,7 @@ reply_ack:
static void handle_on_exit(void)
{
printf("Exiting from acrnd\n");
store_timer_list();
if (acrnd_fd > 0) {
@ -614,6 +637,12 @@ int init_vm(void)
return active_all_vms();
}
static void sigterm_handler(int signo)
{
printf("Received signal %d, Will stop all the vms within %d sec\n", signo, VMS_STOP_TIMEOUT);
sigterm = 1;
}
int main(int argc, char *argv[])
{
/* create listening thread */
@ -632,15 +661,27 @@ int main(int argc, char *argv[])
atexit(handle_on_exit);
if (signal(SIGTERM, sigterm_handler) == SIG_ERR) {
fprintf(stderr, "Can not catch signal SIGTERM(%d), err: %s\n", SIGTERM, strerror(errno));
}
mngr_add_handler(acrnd_fd, ACRND_TIMER, handle_timer_req, NULL);
mngr_add_handler(acrnd_fd, ACRND_STOP, handle_acrnd_stop, NULL);
mngr_add_handler(acrnd_fd, ACRND_RESUME, handle_acrnd_resume, NULL);
/* Last thing, run our timer works */
while (1) {
while (!sigterm) {
try_do_works();
sleep(1);
}
/*
* Try to stop all the vms when receiving SIGTERM within VMS_STOP_TIMEOUT sec
* gracefully. acrnd will exit after waiting maximal VMS_STOP_TIMEOUT sec.
* System will kill all other vms which can not be stopped within VMS_STOP_TIMEOUT sec.
*/
stop_all_vms();
wait_for_stop(VMS_STOP_TIMEOUT);
return 0;
}

1
tools/acrn-manager/acrnd.service
View File

@ -8,7 +8,6 @@ ConditionPathExists=/dev/acrn_vhm
[Service]
Type=simple
ExecStart=/usr/bin/acrnd
ExecStop=/usr/bin/killall -s TERM acrnd
[Install]
WantedBy=multi-user.target