mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-12-22 17:34:18 +03:00
6e2770174e
No only coverity warns about this, but it kind of makes sense too. We have a test whether host supports IOMMU. Some platforms don't have it, I know. But in that case we should print a message that it's unknown whether platform has it or not. Before: (no output) After: QEMU: Checking for device assignment IOMMU support : WARN (Unknown if this platform has IOMMU support) Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
419 lines
10 KiB
C
419 lines
10 KiB
C
/*
|
|
* virt-host-validate-common.c: Sanity check helper APIs
|
|
*
|
|
* Copyright (C) 2012, 2014 Red Hat, Inc.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see
|
|
* <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <sys/utsname.h>
|
|
#ifdef HAVE_MNTENT_H
|
|
# include <mntent.h>
|
|
#endif /* HAVE_MNTENT_H */
|
|
#include <sys/stat.h>
|
|
|
|
#include "virutil.h"
|
|
#include "viralloc.h"
|
|
#include "virfile.h"
|
|
#include "virt-host-validate-common.h"
|
|
#include "virstring.h"
|
|
|
|
#define VIR_FROM_THIS VIR_FROM_NONE
|
|
|
|
static bool quiet;
|
|
|
|
void virHostMsgSetQuiet(bool quietFlag)
|
|
{
|
|
quiet = quietFlag;
|
|
}
|
|
|
|
void virHostMsgCheck(const char *prefix,
|
|
const char *format,
|
|
...)
|
|
{
|
|
va_list args;
|
|
char *msg;
|
|
|
|
if (quiet)
|
|
return;
|
|
|
|
va_start(args, format);
|
|
if (virVasprintf(&msg, format, args) < 0) {
|
|
perror("malloc");
|
|
abort();
|
|
}
|
|
va_end(args);
|
|
|
|
fprintf(stdout, _("%6s: Checking %-60s: "), prefix, msg);
|
|
VIR_FREE(msg);
|
|
}
|
|
|
|
static bool virHostMsgWantEscape(void)
|
|
{
|
|
static bool detectTty = true;
|
|
static bool wantEscape;
|
|
if (detectTty) {
|
|
if (isatty(STDOUT_FILENO))
|
|
wantEscape = true;
|
|
detectTty = false;
|
|
}
|
|
return wantEscape;
|
|
}
|
|
|
|
void virHostMsgPass(void)
|
|
{
|
|
if (quiet)
|
|
return;
|
|
|
|
if (virHostMsgWantEscape())
|
|
fprintf(stdout, "\033[32m%s\033[0m\n", _("PASS"));
|
|
else
|
|
fprintf(stdout, "%s\n", _("PASS"));
|
|
}
|
|
|
|
|
|
static const char * failMessages[] = {
|
|
N_("FAIL"),
|
|
N_("WARN"),
|
|
N_("NOTE"),
|
|
};
|
|
|
|
verify(ARRAY_CARDINALITY(failMessages) == VIR_HOST_VALIDATE_LAST);
|
|
|
|
static const char *failEscapeCodes[] = {
|
|
"\033[31m",
|
|
"\033[33m",
|
|
"\033[34m",
|
|
};
|
|
|
|
verify(ARRAY_CARDINALITY(failEscapeCodes) == VIR_HOST_VALIDATE_LAST);
|
|
|
|
void virHostMsgFail(virHostValidateLevel level,
|
|
const char *format,
|
|
...)
|
|
{
|
|
va_list args;
|
|
char *msg;
|
|
|
|
if (quiet)
|
|
return;
|
|
|
|
va_start(args, format);
|
|
if (virVasprintf(&msg, format, args) < 0) {
|
|
perror("malloc");
|
|
abort();
|
|
}
|
|
va_end(args);
|
|
|
|
if (virHostMsgWantEscape())
|
|
fprintf(stdout, "%s%s\033[0m (%s)\n",
|
|
failEscapeCodes[level], _(failMessages[level]), msg);
|
|
else
|
|
fprintf(stdout, "%s (%s)\n",
|
|
_(failMessages[level]), msg);
|
|
VIR_FREE(msg);
|
|
}
|
|
|
|
|
|
int virHostValidateDeviceExists(const char *hvname,
|
|
const char *dev_name,
|
|
virHostValidateLevel level,
|
|
const char *hint)
|
|
{
|
|
virHostMsgCheck(hvname, "if device %s exists", dev_name);
|
|
|
|
if (access(dev_name, F_OK) < 0) {
|
|
virHostMsgFail(level, "%s", hint);
|
|
return -1;
|
|
}
|
|
|
|
virHostMsgPass();
|
|
return 0;
|
|
}
|
|
|
|
|
|
int virHostValidateDeviceAccessible(const char *hvname,
|
|
const char *dev_name,
|
|
virHostValidateLevel level,
|
|
const char *hint)
|
|
{
|
|
virHostMsgCheck(hvname, "if device %s is accessible", dev_name);
|
|
|
|
if (access(dev_name, R_OK|W_OK) < 0) {
|
|
virHostMsgFail(level, "%s", hint);
|
|
return -1;
|
|
}
|
|
|
|
virHostMsgPass();
|
|
return 0;
|
|
}
|
|
|
|
|
|
int virHostValidateNamespace(const char *hvname,
|
|
const char *ns_name,
|
|
virHostValidateLevel level,
|
|
const char *hint)
|
|
{
|
|
virHostMsgCheck(hvname, "for namespace %s", ns_name);
|
|
char nspath[100];
|
|
|
|
snprintf(nspath, sizeof(nspath), "/proc/self/ns/%s", ns_name);
|
|
|
|
if (access(nspath, F_OK) < 0) {
|
|
virHostMsgFail(level, "%s", hint);
|
|
return -1;
|
|
}
|
|
|
|
virHostMsgPass();
|
|
return 0;
|
|
}
|
|
|
|
|
|
bool virHostValidateHasCPUFlag(const char *name)
|
|
{
|
|
FILE *fp = fopen("/proc/cpuinfo", "r");
|
|
bool ret = false;
|
|
|
|
if (!fp)
|
|
return false;
|
|
|
|
do {
|
|
char line[1024];
|
|
|
|
if (!fgets(line, sizeof(line), fp))
|
|
break;
|
|
|
|
if (strstr(line, name)) {
|
|
ret = true;
|
|
break;
|
|
}
|
|
} while (1);
|
|
|
|
VIR_FORCE_FCLOSE(fp);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
int virHostValidateLinuxKernel(const char *hvname,
|
|
int version,
|
|
virHostValidateLevel level,
|
|
const char *hint)
|
|
{
|
|
struct utsname uts;
|
|
unsigned long thisversion;
|
|
|
|
uname(&uts);
|
|
|
|
virHostMsgCheck(hvname, _("for Linux >= %d.%d.%d"),
|
|
((version >> 16) & 0xff),
|
|
((version >> 8) & 0xff),
|
|
(version & 0xff));
|
|
|
|
if (STRNEQ(uts.sysname, "Linux")) {
|
|
virHostMsgFail(level, "%s", hint);
|
|
return -1;
|
|
}
|
|
|
|
if (virParseVersionString(uts.release, &thisversion, true) < 0) {
|
|
virHostMsgFail(level, "%s", hint);
|
|
return -1;
|
|
}
|
|
|
|
if (thisversion < version) {
|
|
virHostMsgFail(level, "%s", hint);
|
|
return -1;
|
|
} else {
|
|
virHostMsgPass();
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
static int virHostValidateCGroupSupport(const char *hvname,
|
|
const char *cg_name,
|
|
virHostValidateLevel level,
|
|
const char *config_name)
|
|
{
|
|
virHostMsgCheck(hvname, "for cgroup '%s' controller support", cg_name);
|
|
FILE *fp = fopen("/proc/self/cgroup", "r");
|
|
size_t len = 0;
|
|
char *line = NULL;
|
|
ssize_t ret;
|
|
bool matched = false;
|
|
|
|
if (!fp)
|
|
goto error;
|
|
|
|
while ((ret = getline(&line, &len, fp)) >= 0 && !matched) {
|
|
char *tmp = strstr(line, cg_name);
|
|
if (!tmp)
|
|
continue;
|
|
|
|
tmp += strlen(cg_name);
|
|
if (*tmp != ',' &&
|
|
*tmp != ':')
|
|
continue;
|
|
|
|
matched = true;
|
|
}
|
|
VIR_FREE(line);
|
|
VIR_FORCE_FCLOSE(fp);
|
|
if (!matched)
|
|
goto error;
|
|
|
|
virHostMsgPass();
|
|
return 0;
|
|
|
|
error:
|
|
VIR_FREE(line);
|
|
virHostMsgFail(level, "Enable CONFIG_%s in kernel Kconfig file", config_name);
|
|
return -1;
|
|
}
|
|
|
|
#ifdef HAVE_MNTENT_H
|
|
static int virHostValidateCGroupMount(const char *hvname,
|
|
const char *cg_name,
|
|
virHostValidateLevel level)
|
|
{
|
|
virHostMsgCheck(hvname, "for cgroup '%s' controller mount-point", cg_name);
|
|
FILE *fp = setmntent("/proc/mounts", "r");
|
|
struct mntent ent;
|
|
char mntbuf[1024];
|
|
bool matched = false;
|
|
|
|
if (!fp)
|
|
goto error;
|
|
|
|
while (getmntent_r(fp, &ent, mntbuf, sizeof(mntbuf)) && !matched) {
|
|
char *tmp = strstr(ent.mnt_opts, cg_name);
|
|
if (!tmp)
|
|
continue;
|
|
|
|
tmp += strlen(cg_name);
|
|
if (*tmp != ',' &&
|
|
*tmp != '\0')
|
|
continue;
|
|
|
|
matched = true;
|
|
}
|
|
endmntent(fp);
|
|
if (!matched)
|
|
goto error;
|
|
|
|
virHostMsgPass();
|
|
return 0;
|
|
|
|
error:
|
|
virHostMsgFail(level, "Mount '%s' cgroup controller (suggested at /sys/fs/cgroup/%s)",
|
|
cg_name, cg_name);
|
|
return -1;
|
|
}
|
|
#else /* ! HAVE_MNTENT_H */
|
|
static int virHostValidateCGroupMount(const char *hvname,
|
|
const char *cg_name,
|
|
virHostValidateLevel level)
|
|
{
|
|
virHostMsgCheck(hvname, "for cgroup '%s' controller mount-point", cg_name);
|
|
virHostMsgFail(level, "%s", "This platform does not support cgroups");
|
|
return -1;
|
|
}
|
|
#endif /* ! HAVE_MNTENT_H */
|
|
|
|
int virHostValidateCGroupController(const char *hvname,
|
|
const char *cg_name,
|
|
virHostValidateLevel level,
|
|
const char *config_name)
|
|
{
|
|
if (virHostValidateCGroupSupport(hvname,
|
|
cg_name,
|
|
level,
|
|
config_name) < 0)
|
|
return -1;
|
|
if (virHostValidateCGroupMount(hvname,
|
|
cg_name,
|
|
level) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
int virHostValidateIOMMU(const char *hvname,
|
|
virHostValidateLevel level)
|
|
{
|
|
struct stat sb;
|
|
const char *bootarg = NULL;
|
|
bool isAMD = false, isIntel = false;
|
|
|
|
if (virHostValidateHasCPUFlag("vmx"))
|
|
isIntel = true;
|
|
else if (virHostValidateHasCPUFlag("svm"))
|
|
isAMD = true;
|
|
|
|
virHostMsgCheck(hvname, "%s", _("for device assignment IOMMU support"));
|
|
|
|
if (isIntel) {
|
|
if (access("/sys/firmware/acpi/tables/DMAR", F_OK) == 0) {
|
|
virHostMsgPass();
|
|
bootarg = "intel_iommu=on";
|
|
} else {
|
|
virHostMsgFail(level,
|
|
"No ACPI DMAR table found, IOMMU either "
|
|
"disabled in BIOS or not supported by this "
|
|
"hardware platform");
|
|
return -1;
|
|
}
|
|
} else if (isAMD) {
|
|
if (access("/sys/firmware/acpi/tables/IVRS", F_OK) == 0) {
|
|
virHostMsgPass();
|
|
bootarg = "iommu=pt iommu=1";
|
|
} else {
|
|
virHostMsgFail(level,
|
|
"No ACPI IVRS table found, IOMMU either "
|
|
"disabled in BIOS or not supported by this "
|
|
"hardware platform");
|
|
return -1;
|
|
}
|
|
} else {
|
|
virHostMsgFail(level,
|
|
"Unknown if this platform has IOMMU support");
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* We can only check on newer kernels with iommu groups & vfio */
|
|
if (stat("/sys/kernel/iommu_groups", &sb) < 0)
|
|
return 0;
|
|
|
|
if (!S_ISDIR(sb.st_mode))
|
|
return 0;
|
|
|
|
virHostMsgCheck(hvname, "%s", _("if IOMMU is enabled by kernel"));
|
|
if (sb.st_nlink <= 2) {
|
|
virHostMsgFail(level,
|
|
"IOMMU appears to be disabled in kernel. "
|
|
"Add %s to kernel cmdline arguments", bootarg);
|
|
return -1;
|
|
}
|
|
virHostMsgPass();
|
|
return 0;
|
|
}
|