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/*
* Copyright (C) 2013 Linux Test Project
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it
* is free of the rightful claim of any third person regarding
* infringement or the like. Any license provided herein, whether
* implied or otherwise, applies only to this software file. Patent
* licenses, if any, provided herein do not apply to combinations of
* this program with other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <unistd.h>
#include "test.h"
#include "safe_macros.h"
static int is_kvm(void)
{
FILE *cpuinfo;
char line[64];
int found;
/* this doesn't work with custom -cpu values, since there's
* no easy, reasonable or reliable way to work around those */
cpuinfo = SAFE_FOPEN(NULL, "/proc/cpuinfo", "r");
found = 0;
while (fgets(line, sizeof(line), cpuinfo) != NULL) {
if (strstr(line, "QEMU Virtual CPU")) {
found = 1;
break;
}
}
SAFE_FCLOSE(NULL, cpuinfo);
return found;
}
static int is_xen(void)
{
char hypervisor_type[4];
if (access("/proc/xen", F_OK) == 0)
return 1;
if (access("/sys/hypervisor/type", F_OK) == 0) {
SAFE_FILE_SCANF(NULL, "/sys/hypervisor/type", "%3s",
hypervisor_type);
return strncmp("xen", hypervisor_type,
sizeof(hypervisor_type)) == 0;
}
return 0;
}
static int try_systemd_detect_virt(void)
{
FILE *f;
char virt_type[64];
int ret;
/* See tst_cmd.c */
void *old_handler = signal(SIGCHLD, SIG_DFL);
f = popen("systemd-detect-virt", "r");
if (!f) {
signal(SIGCHLD, old_handler);
return 0;
}
if (!fgets(virt_type, sizeof(virt_type), f))
virt_type[0] = '\0';
ret = pclose(f);
signal(SIGCHLD, old_handler);
/*
* systemd-detect-virt not found by shell or no virtualization detected
* (systemd-detect-virt returns non-zero)
*/
if (ret < 0 || (WIFEXITED(ret) && WEXITSTATUS(ret) == 127))
return -1;
if (ret)
return 0;
if (!strncmp("kvm", virt_type, 3))
return VIRT_KVM;
if (!strncmp("xen", virt_type, 3))
return VIRT_XEN;
return VIRT_OTHER;
}
int tst_is_virt(int virt_type)
{
int ret = try_systemd_detect_virt();
if (ret >= 0) {
if (virt_type == VIRT_ANY)
return ret != 0;
else
return ret == virt_type;
}
switch (virt_type) {
case VIRT_ANY:
return is_xen() || is_kvm();
case VIRT_XEN:
return is_xen();
case VIRT_KVM:
return is_kvm();
case VIRT_OTHER:
return 0;
}
tst_brkm(TBROK, NULL, "invalid virt_type flag: %d", virt_type);
return -1;
}
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