/*
* Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
*
* 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.
*
* 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.
*
*/
/**********************************************************
*
* TEST IDENTIFIER : create_module02
*
* EXECUTED BY : root / superuser
*
* TEST TITLE : Checking error conditions for create_module(2)
*
* TEST CASE TOTAL : 8
*
* AUTHOR : Madhu T L <madhu.tarikere@wipro.com>
*
* SIGNALS
* Uses SIGUSR1 to pause before test if option set.
* (See the parse_opts(3) man page).
*
* DESCRIPTION
* Verify that,
* 1. create_module(2) returns -1 and sets errno to EPERM, if effective
* user id of the caller is not superuser.
* 2. create_module(2) returns -1 and sets errno to EFAULT, if module
* name is outside the program's accessible address space.
* 3. create_module(2) returns -1 and sets errno to EFAULT, if module
* name parameter is NULL.
* 4. create_module(2) returns -1 and sets errno to EINVAL, if module
* name parameter is null terminated (zero length) string.
* 5. create_module(2) returns -1 and sets errno to EEXIST, if module
* entry with the same name already exists.
* 6. create_module(2) returns -1 and sets errno to EINVAL, if module
* size parameter is too small.
* 7. create_module(2) returns -1 and sets errno to ENAMETOOLONG, if
* module name parameter is too long.
* 8. create_module(2) returns -1 and sets errno to ENOMEM, if module
* size parameter is too large.
*
* Setup:
* Setup signal handling.
* Test caller is super user
* Check existances of "nobody" user id.
* Initialize long module name
* Set expected errnos for logging
* Pause for SIGUSR1 if option specified.
* Initialize modname for each child process
*
* Test:
* Loop if the proper options are given.
* Execute system call
* Check return code and error number, if matching,
* Issue PASS message
* Otherwise,
* Issue FAIL message
*
* Cleanup:
* Print errno log and/or timing stats if options given
*
* USAGE: <for command-line>
* create_module02 [-c n] [-e] [-f] [-h] [-i n] [-I x] [-p] [-P x] [-t]
* where, -c n : Run n copies concurrently.
* -e : Turn on errno logging.
* -f : Turn off functional testing
* -h : Show help screen
* -i n : Execute test n times.
* -I x : Execute test for x seconds.
* -p : Pause for SIGUSR1 before starting
* -P x : Pause for x seconds between iterations.
* -t : Turn on syscall timing.
*
****************************************************************/
#include <errno.h>
#include <pwd.h>
#include <sys/types.h>
#include <unistd.h>
#include <limits.h>
#include <asm/atomic.h>
#include <linux/module.h>
#include "test.h"
#include "safe_macros.h"
#ifndef PAGE_SIZE
#define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
#endif
#define MODSIZE 10000 /* Arbitrarily selected MODSIZE */
#define NULLMODNAME ""
#define MAXMODSIZE 0xffffffffffffffff /* Max size of size_t */
#define SMALLMODSIZE 1 /* Arbitrarily selected SMALLMODSIZE */
#define BASEMODNAME "dummy"
#define LONGMODNAMECHAR 'm' /* Arbitrarily selected the alphabet */
#define MODNAMEMAX (PAGE_SIZE + 1)
struct test_case_t { /* test case structure */
char *modname;
size_t size;
caddr_t retval; /* syscall return value */
int experrno; /* expected errno */
char *desc;
int (*setup) (void); /* Individual setup routine */
void (*cleanup) (void); /* Individual cleanup routine */
};
char *TCID = "create_module02";
static char nobody_uid[] = "nobody";
struct passwd *ltpuser;
static char longmodname[MODNAMEMAX];
static int testno;
static char modname[20]; /* Name of the module */
static void setup(void);
static void cleanup(void);
static int setup1(void);
static void cleanup1(void);
static int setup2(void);
static void cleanup2(void);
static struct test_case_t tdat[] = {
{modname, MODSIZE, (caddr_t) - 1, EPERM,
"non-superuser", setup1, cleanup1},
{(char *)-1, MODSIZE, (caddr_t) - 1, EFAULT,
"module name outside the program's accessible address space", NULL,
NULL},
{NULL, MODSIZE, (caddr_t) - 1, EFAULT,
"NULL module name", NULL, NULL},
{NULLMODNAME, MODSIZE, (caddr_t) - 1, EINVAL,
"null terminated module name", NULL, NULL},
{modname, MODSIZE, (caddr_t) - 1, EEXIST,
"already existing module", setup2, cleanup2},
{modname, SMALLMODSIZE, (caddr_t) - 1, EINVAL,
"insufficient module size", NULL, NULL},
{longmodname, MODSIZE, (caddr_t) - 1, ENAMETOOLONG,
"long module name", NULL, NULL},
/*
*This test case is giving segmentation fault on
* 2.4.* series, but works as expected with 2.5.* series of kernel.
*/
{modname, MAXMODSIZE, (caddr_t) - 1, ENOMEM,
"large module size", NULL, NULL},
};
int TST_TOTAL = sizeof(tdat) / sizeof(tdat[0]);
int main(int argc, char **argv)
{
int lc;
tst_parse_opts(argc, argv, NULL, NULL);
setup();
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* reset tst_count in case we are looping */
tst_count = 0;
for (testno = 0; testno < TST_TOTAL; ++testno) {
if ((tdat[testno].setup) && (tdat[testno].setup())) {
/* setup() failed, skip this test */
continue;
}
TEST(create_module(tdat[testno].modname,
tdat[testno].size));
if ((TEST_RETURN == (int)tdat[testno].retval) &&
(TEST_ERRNO == tdat[testno].experrno)) {
tst_resm(TPASS, "Expected results for %s, "
"errno: %d",
tdat[testno].desc, TEST_ERRNO);
} else {
tst_resm(TFAIL, "Unexpected results for %s ; "
"returned %d (expected %d), errno %d "
"(expected %d)", tdat[testno].desc,
TEST_RETURN, tdat[testno].retval,
TEST_ERRNO, tdat[testno].experrno);
}
if (tdat[testno].cleanup) {
tdat[testno].cleanup();
}
}
}
cleanup();
tst_exit();
}
int setup1(void)
{
/* Change effective user id to nodody */
if (seteuid(ltpuser->pw_uid) == -1) {
tst_resm(TBROK, "seteuid failed to set the effective"
" uid to %d", ltpuser->pw_uid);
return 1;
}
return 0;
}
void cleanup1(void)
{
/* Change effective user id to root */
SAFE_SETEUID(NULL, 0);
}
int setup2(void)
{
/* Create a loadable module entry */
if (create_module(modname, MODSIZE) == -1) {
tst_resm(TBROK, "Failed to create module entry"
" for %s", modname);
return 1;
}
return 0;
}
void cleanup2(void)
{
/* Remove loadable module entry */
if (delete_module(modname) == -1) {
tst_brkm(TBROK, NULL, "Failed to delete module entry"
" for %s", modname);
}
}
/*
* setup()
* performs all ONE TIME setup for this test
*/
void setup(void)
{
tst_sig(NOFORK, DEF_HANDLER, cleanup);
tst_require_root();
if (tst_kvercmp(2, 5, 48) >= 0)
tst_brkm(TCONF, NULL, "This test will not work on "
"kernels after 2.5.48");
/* Check for nobody_uid user id */
if ((ltpuser = getpwnam(nobody_uid)) == NULL) {
tst_brkm(TBROK, NULL, "Required user %s doesn't exists",
nobody_uid);
}
/* Initialize longmodname to LONGMODNAMECHAR character */
memset(longmodname, LONGMODNAMECHAR, MODNAMEMAX - 1);
/* Pause if that option was specified
* TEST_PAUSE contains the code to fork the test with the -c option.
*/
TEST_PAUSE;
/* Get unique module name for each child process */
if (sprintf(modname, "%s_%d", BASEMODNAME, getpid()) == -1) {
tst_brkm(TBROK, NULL, "Failed to initialize module name");
}
}
/*
* cleanup()
* performs all ONE TIME cleanup for this test at
* completion or premature exit
*/
void cleanup(void)
{
}