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/*
* Copyright (C) 2013-2019 Canonical, Ltd.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* This code is a complete clean re-write of the stress tool by
* Colin Ian King <colin.king@canonical.com> and attempts to be
* backwardly compatible with the stress tool by Amos Waterland
* <apw@rossby.metr.ou.edu> but has more stress tests and more
* functionality.
*
*/
#include "stress-ng.h"
#define check_do_run() \
if (!g_keep_stressing_flag) \
break; \
/*
* stress on system information
* stress system by rapid fetches of system information
*/
static int stress_sysinfo(const args_t *args)
{
int n_mounts;
char *mnts[128];
(void)memset(mnts, 0, sizeof(mnts));
n_mounts = mount_get(mnts, SIZEOF_ARRAY(mnts));
if (n_mounts < 0) {
pr_err("%s: failed to get mount points\n", args->name);
return EXIT_FAILURE;
}
if (args->instance == 0)
pr_dbg("%s: found %d mount points\n",
args->name, n_mounts);
do {
struct tms tms_buf;
clock_t clk;
#if defined(HAVE_SYS_STATVFS_H)
struct statvfs statvfs_buf;
#endif
int i, ret;
#if defined(HAVE_SYS_SYSINFO_H) && \
defined(HAVE_SYSINFO) && \
defined(HAVE_SYS_STATFS_H)
struct sysinfo sysinfo_buf;
struct statfs statfs_buf;
ret = sysinfo(&sysinfo_buf);
if ((ret < 0) && (g_opt_flags & OPT_FLAGS_VERIFY)) {
pr_fail_err("sysinfo");
}
check_do_run();
/* Linux statfs variant */
for (i = 0; i < n_mounts; i++) {
int fd;
check_do_run();
if (!mnts[i])
continue;
ret = statfs(mnts[i], &statfs_buf);
/* Mount may have been removed, so purge it */
if ((ret < 0) && (errno == ENOENT)) {
free(mnts[i]);
mnts[i] = NULL;
continue;
}
if ((ret < 0) && (g_opt_flags & OPT_FLAGS_VERIFY)) {
if (errno != ENOSYS &&
errno != EOVERFLOW &&
errno != EACCES) {
pr_fail("%s: statfs on %s "
"failed: errno=%d (%s)\n",
args->name, mnts[i], errno,
strerror(errno));
}
}
fd = open(mnts[i], O_RDONLY | O_DIRECTORY);
if (fd < 0)
continue;
ret = fstatfs(fd, &statfs_buf);
(void)close(fd);
if ((ret < 0) && (errno == ENOENT))
continue;
if ((ret < 0) && (g_opt_flags & OPT_FLAGS_VERIFY)) {
if (errno != ENOSYS &&
errno != EOVERFLOW &&
errno != EACCES) {
pr_fail("%s: fstatfs on %s "
"failed: errno=%d (%s)\n",
args->name, mnts[i], errno,
strerror(errno));
}
}
}
#endif
#if defined(HAVE_USTAT)
check_do_run();
for (i = 0; i < n_mounts; i++) {
struct stat sbuf;
struct ustat ubuf;
ret = stat(mnts[i], &sbuf);
if (ret < 0)
continue;
ret = ustat(sbuf.st_dev, &ubuf);
if ((ret < 0) && (g_opt_flags & OPT_FLAGS_VERIFY)) {
if (errno != EINVAL &&
errno != ENOSYS) {
pr_fail("%s: ustat on %s "
"failed: errno=%d (%s)\n",
args->name, mnts[i], errno,
strerror(errno));
}
}
}
#endif
check_do_run();
#if defined(HAVE_SYS_STATVFS_H)
/* POSIX.1-2001 statfs variant */
for (i = 0; i < n_mounts; i++) {
check_do_run();
if (!mnts[i])
continue;
ret = statvfs(mnts[i], &statvfs_buf);
if ((ret < 0) && (g_opt_flags & OPT_FLAGS_VERIFY)) {
if (errno != ENOSYS &&
errno != EOVERFLOW &&
errno != EACCES) {
pr_fail("%s: statvfs on %s "
"failed: errno=%d (%s)\n",
args->name, mnts[i], errno,
strerror(errno));
}
}
}
#endif
check_do_run();
clk = times(&tms_buf);
if ((clk == (clock_t)-1) && (g_opt_flags & OPT_FLAGS_VERIFY)) {
pr_fail_err("times");
}
inc_counter(args);
} while (keep_stressing());
mount_free(mnts, n_mounts);
return EXIT_SUCCESS;
}
stressor_info_t stress_sysinfo_info = {
.stressor = stress_sysinfo,
.class = CLASS_OS
};
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