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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"
#if defined(HAVE_KEYUTILS_H) && \
defined(HAVE_ADD_KEY) && \
defined(HAVE_KEYCTL)
#define MAX_KEYS (256)
#define KEYCTL_TIMEOUT (7200)
static long sys_keyctl(int cmd, ...)
{
va_list args;
long int arg0, arg1, arg2, ret;
va_start(args, cmd);
arg0 = va_arg(args, long int);
arg1 = va_arg(args, long int);
arg2 = va_arg(args, long int);
ret = syscall(__NR_keyctl, cmd, arg0, arg1, arg2);
va_end(args);
return ret;
}
static key_serial_t sys_add_key(
const char *type,
const char *description,
const void *payload,
size_t plen,
key_serial_t keyring)
{
return (key_serial_t)syscall(__NR_add_key, type,
description, payload, plen, keyring);
}
#if defined(HAVE_REQUEST_KEY)
static key_serial_t sys_request_key(
const char *type,
const char *description,
const char *callout_info,
key_serial_t keyring)
{
return (key_serial_t)syscall(__NR_request_key,
type, description, callout_info, keyring);
}
#endif
/*
* stress_key
* stress key operations
*/
static int stress_key(const args_t *args)
{
key_serial_t keys[MAX_KEYS];
pid_t ppid = getppid();
int rc = EXIT_SUCCESS;
bool timeout_supported = true;
bool no_error = true;
do {
size_t i = 0, n = 0;
char description[64];
char payload[64];
/* Add as many keys as we are allowed */
for (n = 0; n < MAX_KEYS; n++) {
(void)snprintf(description, sizeof(description),
"stress-ng-key-%u-%" PRIu32
"-%zu", ppid, args->instance, n);
(void)snprintf(payload, sizeof(payload),
"somedata-%zu", n);
keys[n] = sys_add_key("user", description,
payload, strlen(payload),
KEY_SPEC_PROCESS_KEYRING);
if (keys[n] < 0) {
if (errno == ENOSYS) {
pr_inf("%s: skipping stressor, add_key not implemented\n",
args->name);
no_error = false;
rc = EXIT_NOT_IMPLEMENTED;
goto tidy;
}
if ((errno != ENOMEM) && (errno != EDQUOT))
pr_fail_err("add_key");
goto tidy;
}
#if defined(KEYCTL_SET_TIMEOUT)
if (timeout_supported) {
if (sys_keyctl(KEYCTL_SET_TIMEOUT, keys[n], KEYCTL_TIMEOUT) < 0) {
/* Some platforms don't support this */
if (errno == ENOSYS) {
timeout_supported = false;
} else {
pr_fail_err("keyctl KEYCTL_SET_TIMEOUT");
}
}
}
if (!g_keep_stressing_flag)
goto tidy;
#endif
}
/* And manipulate the keys */
for (i = 0; i < n; i++) {
(void)snprintf(description, sizeof(description),
"stress-ng-key-%u-%" PRIu32
"-%zu", ppid, args->instance, i);
#if defined(KEYCTL_DESCRIBE)
if (sys_keyctl(KEYCTL_DESCRIBE, keys[i], description) < 0)
pr_fail_err("keyctl KEYCTL_DESCRIBE");
if (!g_keep_stressing_flag)
goto tidy;
#endif
(void)snprintf(payload, sizeof(payload),
"somedata-%zu", n);
#if defined(KEYCTL_UPDATE)
if (sys_keyctl(KEYCTL_UPDATE, keys[i],
payload, strlen(payload)) < 0) {
if ((errno != ENOMEM) && (errno != EDQUOT))
pr_fail_err("keyctl KEYCTL_UPDATE");
}
if (!g_keep_stressing_flag)
goto tidy;
#endif
#if defined(KEYCTL_READ)
(void)memset(payload, 0, sizeof(payload));
if (sys_keyctl(KEYCTL_READ, keys[i],
payload, sizeof(payload)) < 0)
pr_fail_err("keyctl KEYCTL_READ");
if (!g_keep_stressing_flag)
goto tidy;
#endif
#if defined(HAVE_REQUEST_KEY)
(void)snprintf(description, sizeof(description),
"stress-ng-key-%u-%" PRIu32
"-%zu", ppid, args->instance, i);
if (sys_request_key("user", description, NULL,
KEY_SPEC_PROCESS_KEYRING) < 0) {
pr_fail_err("request_key");
}
if (!g_keep_stressing_flag)
goto tidy;
#endif
#if defined(KEYCTL_CHOWN)
(void)sys_keyctl(KEYCTL_CHOWN, keys[i], getuid(), -1);
(void)sys_keyctl(KEYCTL_CHOWN, keys[i], -1, getgid());
#endif
#if defined(KEYCTL_SETPERM)
(void)sys_keyctl(KEYCTL_SETPERM, keys[i], KEY_USR_ALL);
#endif
#if defined(KEYCTL_CLEAR)
(void)sys_keyctl(KEYCTL_CLEAR, keys[i]);
#endif
#if defined(KEYCTL_REVOKE)
if (mwc1())
(void)sys_keyctl(KEYCTL_REVOKE, keys[i]);
#endif
#if defined(KEYCTL_INVALIDATE)
(void)sys_keyctl(KEYCTL_INVALIDATE, keys[i]);
#endif
}
tidy:
inc_counter(args);
/* If we hit too many errors and bailed out early, clean up */
while (i < n) {
if (keys[i] >= 0) {
#if defined(KEYCTL_CLEAR)
(void)sys_keyctl(KEYCTL_CLEAR, keys[i]);
#endif
#if defined(KEYCTL_INVALIDATE)
(void)sys_keyctl(KEYCTL_INVALIDATE, keys[i]);
#endif
}
i++;
}
} while (no_error && keep_stressing());
return rc;
}
stressor_info_t stress_key_info = {
.stressor = stress_key,
.class = CLASS_OS
};
#else
stressor_info_t stress_key_info = {
.stressor = stress_not_implemented,
.class = CLASS_OS
};
#endif
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