blob: d4fb7c0c0e565fd718458554abadbbfe6b08733b [file] [log] [blame] [raw]
/*
* Copyright (C) 2000-2013, Parallels, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <linux/cpt_ioctl.h>
#include <linux/vzcalluser.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <dirent.h>
#include "cpt.h"
#include "env.h"
#include "exec.h"
#include "script.h"
#include "vzconfig.h"
#include "vzerror.h"
#include "logger.h"
#include "util.h"
int cpt_cmd(vps_handler *h, envid_t veid, const char *root,
int action, int cmd, unsigned int ctx)
{
int fd;
int err, ret = 0;
const char *file;
if (!vps_is_run(h, veid)) {
logger(-1, 0, "Container is not running");
return VZ_VE_NOT_RUNNING;
}
if (action == CMD_CHKPNT) {
file = PROC_CPT;
err = VZ_CHKPNT_ERROR;
} else if (action == CMD_RESTORE) {
file = PROC_RST;
err = VZ_RESTORE_ERROR;
} else {
logger(-1, 0, "cpt_cmd: Unsupported cmd");
return -1;
}
if ((fd = open(file, O_RDWR)) < 0) {
if (errno == ENOENT)
logger(-1, errno, "Error: No checkpointing"
" support, unable to open %s", file);
else
logger(-1, errno, "Unable to open %s", file);
return err;
}
if ((ret = ioctl(fd, CPT_JOIN_CONTEXT, ctx ? : veid)) < 0) {
logger(-1, errno, "Can not join cpt context %d", ctx ? : veid);
goto err;
}
switch (cmd) {
case CMD_KILL:
logger(0, 0, "Killing...");
if ((ret = ioctl(fd, CPT_KILL, 0)) < 0) {
logger(-1, errno, "Can not kill container");
goto err;
}
break;
case CMD_RESUME:
logger(0, 0, "Resuming...");
clean_hardlink_dir(root);
if ((ret = ioctl(fd, CPT_RESUME, 0)) < 0) {
logger(-1, errno, "Can not resume container");
goto err;
}
break;
}
if (!ctx) {
logger(2, 0, "\tput context");
if ((ret = ioctl(fd, CPT_PUT_CONTEXT, 0)) < 0) {
logger(-1, errno, "Can not put context");
goto err;
}
}
err:
close(fd);
return ret ? err : 0;
}
int vps_chkpnt(vps_handler *h, envid_t veid, const fs_param *fs,
int cmd, cpt_param *param)
{
const char *root = fs->root;
if (root == NULL) {
logger(-1, 0, "Container root (VE_ROOT) is not set");
return VZ_VE_ROOT_NOTSET;
}
if (!vps_is_run(h, veid)) {
logger(-1, 0, "Unable to setup checkpointing: "
"container is not running");
return VZ_VE_NOT_RUNNING;
}
return h->env_chkpnt(h, veid, fs, cmd, param);
}
int vps_restore(vps_handler *h, envid_t veid, vps_param *vps_p, int cmd,
cpt_param *param, skipFlags skip)
{
if (vps_is_run(h, veid)) {
logger(-1, 0, "Unable to perform restore: "
"container already running");
return VZ_VE_RUNNING;
}
return h->env_restore(h, veid, vps_p, cmd, param, skip);
}