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https://github.com/projectacrn/acrn-hypervisor.git
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2ea2716cd9
For cross-VM S5 notify via vUART, life_mngr service is running on UOS. It is listening on /dev/ttyS1 to get SOS's commands. The protocol is: SOS send "shutdown", UOS feedback "acked". When SOS triggle shutdown, SOS can 1) check VM's status until UOS stopped, 2) retry shutdown UOS normally with timeout. So, no matter life_mngr server is running, SOS's shutdown procedure will properly finish. Tracked-On: #3564 Signed-off-by: fuyanX <yanx.fu@intel.com> Acked-by: Yan, Like <like.yan@intel.com>
114 lines
2.4 KiB
C
114 lines
2.4 KiB
C
/*
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* Copyright (C)2019 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#define SOS_REQ "shutdown"
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#define UOS_ACK "acked"
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#define BUFF_SIZE 16U
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#define MSG_SIZE 8U
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#define NODE_SIZE 3U
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enum nodetype {
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NODE_UNKNOWN = 0,
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NODE_UOS_SERVER,
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NODE_SOS_CLIENT,
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};
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int set_serial_interface_attributes(int fd, int speed)
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{
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struct termios tty;
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if (tcgetattr(fd, &tty) < 0) {
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printf("Error from tcgetattr: %s\n", strerror(errno));
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return errno;
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}
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cfsetospeed(&tty, (speed_t)speed);
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cfsetispeed(&tty, (speed_t)speed);
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/* set input-mode */
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tty.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
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/* set output-mode */
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tty.c_oflag &= ~OPOST;
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/* set control-mode */
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tty.c_cflag |= (CLOCAL | CREAD);
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tty.c_cflag &= ~CSIZE;
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tty.c_cflag |= CS8;
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tty.c_cflag &= ~PARENB;
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tty.c_cflag &= ~CSTOPB;
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tty.c_cflag &= ~CRTSCTS;
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/* set local-mode */
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tty.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
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/* block until one char read, set next char's timeout */
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tty.c_cc[VMIN] = 1;
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tty.c_cc[VTIME] = 1;
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if (tcsetattr(fd, TCSANOW, &tty) != 0) {
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printf("Error from tcsetattr: %s\n", strerror(errno));
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return errno;
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}
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return 0;
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}
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int main(int argc, char *argv[])
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{
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char *devname_uos = "";
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int fd_uos = 0;
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unsigned char recvbuf[BUFF_SIZE];
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enum nodetype node = NODE_UNKNOWN;
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if (argc <= 2) {
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printf("Too few options. Example: [./life_mngr uos /dev/ttyS1].\n");
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return -EINVAL;
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}
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if (strncmp("uos", argv[1], NODE_SIZE) == 0) {
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node = NODE_UOS_SERVER;
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} else if (strncmp("sos", argv[1], NODE_SIZE) == 0) {
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node = NODE_SOS_CLIENT;
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} else {
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printf("Invalid param. Example: [./life_mngr uos /dev/ttyS1].\n");
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return -EINVAL;
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}
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if (node == NODE_UOS_SERVER) {
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devname_uos = argv[2];
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fd_uos = open(devname_uos, O_RDWR | O_NOCTTY | O_SYNC);
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if (fd_uos < 0) {
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printf("Error opening %s: %s\n", devname_uos, strerror(errno));
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return errno;
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}
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set_serial_interface_attributes(fd_uos, B115200);
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}
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/* UOS-server wait for shutdown from SOS */
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do {
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if (node == NODE_UOS_SERVER) {
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memset(recvbuf, 0, sizeof(recvbuf));
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read(fd_uos, recvbuf, sizeof(recvbuf));
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if (strncmp(SOS_REQ, recvbuf, MSG_SIZE) == 0) {
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write(fd_uos, UOS_ACK, sizeof(UOS_ACK));
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printf("SOS start shutdown\n");
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system("poweroff");
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break;
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}
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}
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} while (1);
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return 0;
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}
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