139 lines
3.1 KiB
C
139 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) International Business Machines Corp., 2004
|
|
* Copyright (c) Linux Test Project, 2004-2017
|
|
*/
|
|
|
|
/*
|
|
* DESCRIPTION
|
|
* hugeshmctl03 - check for EACCES, and EPERM errors
|
|
*
|
|
* ALGORITHM
|
|
* create a large shared memory segment with root only read & write
|
|
* permissions fork a child process
|
|
* if child
|
|
* set the ID of the child process to that of "ltpuser1"
|
|
* call do_child()
|
|
* loop if that option was specified
|
|
* call shmctl() using three different invalid cases
|
|
* check the errno value
|
|
* issue a PASS message if we get EACCES or EPERM
|
|
* otherwise, the tests fails
|
|
* issue a FAIL message
|
|
* call cleanup
|
|
* if parent
|
|
* wait for child to exit
|
|
* remove the large shared memory segment
|
|
*
|
|
* HISTORY
|
|
* 03/2001 - Written by Wayne Boyer
|
|
* 04/2004 - Updated by Robbie Williamson
|
|
*
|
|
* RESTRICTIONS
|
|
* test must be run as root
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <limits.h>
|
|
#include "hugetlb.h"
|
|
|
|
static size_t shm_size;
|
|
static int shm_id_1 = -1;
|
|
static struct shmid_ds buf;
|
|
static uid_t ltp_uid;
|
|
static char *ltp_user = "nobody";
|
|
|
|
struct tcase {
|
|
int *shmid;
|
|
int cmd;
|
|
struct shmid_ds *sbuf;
|
|
int error;
|
|
} tcases[] = {
|
|
/* EACCES - child has no read permission for segment */
|
|
{&shm_id_1, IPC_STAT, &buf, EACCES},
|
|
/* EPERM - IPC_SET - child doesn't have permission to change segment */
|
|
{&shm_id_1, IPC_SET, &buf, EPERM},
|
|
/* EPERM - IPC_RMID - child can not remove the segment */
|
|
{&shm_id_1, IPC_RMID, &buf, EPERM},
|
|
};
|
|
|
|
static void do_child(void);
|
|
|
|
static void test_hugeshmctl(void)
|
|
{
|
|
pid_t pid;
|
|
int status;
|
|
|
|
switch (pid = SAFE_FORK()) {
|
|
case 0:
|
|
/* set the user ID of the child to the non root user */
|
|
SAFE_SETUID(ltp_uid);
|
|
do_child();
|
|
exit(0);
|
|
default:
|
|
SAFE_WAITPID(pid, &status, 0);
|
|
}
|
|
}
|
|
|
|
static void do_child(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(tcases); i++) {
|
|
TEST(shmctl(*(tcases[i].shmid), tcases[i].cmd, tcases[i].sbuf));
|
|
if (TST_RET != -1) {
|
|
tst_res(TFAIL, "shmctl succeeded "
|
|
"unexpectedly");
|
|
continue;
|
|
}
|
|
if (TST_ERR == tcases[i].error)
|
|
tst_res(TPASS | TTERRNO, "shmctl failed "
|
|
"as expected");
|
|
else
|
|
tst_res(TFAIL | TTERRNO, "shmctl failed "
|
|
"unexpectedly - expect errno = "
|
|
"%d, got", tcases[i].error);
|
|
}
|
|
}
|
|
|
|
void setup(void)
|
|
{
|
|
long hpage_size;
|
|
|
|
if (tst_hugepages == 0)
|
|
tst_brk(TCONF, "No enough hugepages for testing.");
|
|
|
|
hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
|
|
|
|
shm_size = hpage_size * tst_hugepages / 2;
|
|
update_shm_size(&shm_size);
|
|
shmkey = getipckey();
|
|
shm_id_1 = shmget(shmkey, shm_size,
|
|
SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW);
|
|
if (shm_id_1 == -1)
|
|
tst_brk(TBROK | TERRNO, "shmget");
|
|
|
|
/* get the userid for a non root user */
|
|
ltp_uid = getuserid(ltp_user);
|
|
}
|
|
|
|
void cleanup(void)
|
|
{
|
|
rm_shm(shm_id_1);
|
|
}
|
|
|
|
static struct tst_test test = {
|
|
.needs_root = 1,
|
|
.forks_child = 1,
|
|
.needs_tmpdir = 1,
|
|
.options = (struct tst_option[]) {
|
|
{"s:", &nr_opt, "-s num Set the number of the been allocated hugepages"},
|
|
{}
|
|
},
|
|
.setup = setup,
|
|
.cleanup = cleanup,
|
|
.test_all = test_hugeshmctl,
|
|
.request_hugepages = 128,
|
|
};
|