1 /*
2 *
3 * Copyright (c) International Business Machines Corp., 2004
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /*
21 * NAME
22 * hugeshmctl02.c
23 *
24 * DESCRIPTION
25 * hugeshmctl02 - check for EACCES, EFAULT and EINVAL errors
26 *
27 * ALGORITHM
28 * create a large shared memory segment without read or write permissions
29 * create a large shared memory segment with read & write permissions
30 * loop if that option was specified
31 * call shmctl() using five different invalid cases
32 * check the errno value
33 * issue a PASS message if we get EACCES, EFAULT or EINVAL
34 * otherwise, the tests fails
35 * issue a FAIL message
36 * call cleanup
37 *
38 * USAGE: <for command-line>
39 * hugeshmctl02 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
40 * where, -c n : Run n copies concurrently.
41 * -e : Turn on errno logging.
42 * -i n : Execute test n times.
43 * -I x : Execute test for x seconds.
44 * -P x : Pause for x seconds between iterations.
45 * -t : Turn on syscall timing.
46 *
47 * HISTORY
48 * 03/2001 - Written by Wayne Boyer
49 * 04/2004 - Updated by Robbie Williamson
50 *
51 * RESTRICTIONS
52 * none
53 */
54
55 #include <pwd.h>
56 #include "test.h"
57 #include "safe_macros.h"
58 #include "mem.h"
59 #include "hugetlb.h"
60
61 char *TCID = "hugeshmctl02";
62 int TST_TOTAL = 4;
63
64 static size_t shm_size;
65 static int shm_id_1 = -1;
66 static int shm_id_2 = -1;
67 static int shm_id_3 = -1;
68 static struct shmid_ds buf;
69
70 static long hugepages = 128;
71 static option_t options[] = {
72 {"s:", &sflag, &nr_opt},
73 {NULL, NULL, NULL}
74 };
75
76 struct test_case_t {
77 int *shmid;
78 int cmd;
79 struct shmid_ds *sbuf;
80 int error;
81 } TC[] = {
82 /* EFAULT - IPC_SET & buf isn't valid */
83 {
84 &shm_id_2, IPC_SET, (struct shmid_ds *)-1, EFAULT},
85 /* EFAULT - IPC_STAT & buf isn't valid */
86 {
87 &shm_id_2, IPC_STAT, (struct shmid_ds *)-1, EFAULT},
88 /* EINVAL - the shmid is not valid */
89 {
90 &shm_id_3, IPC_STAT, &buf, EINVAL},
91 /* EINVAL - the command is not valid */
92 {
93 &shm_id_2, -1, &buf, EINVAL},};
94
main(int ac,char ** av)95 int main(int ac, char **av)
96 {
97 int lc, i;
98
99 tst_parse_opts(ac, av, options, NULL);
100
101 if (sflag)
102 hugepages = SAFE_STRTOL(NULL, nr_opt, 0, LONG_MAX);
103
104 setup();
105
106 for (lc = 0; TEST_LOOPING(lc); lc++) {
107 tst_count = 0;
108
109 for (i = 0; i < TST_TOTAL; i++) {
110 TEST(shmctl(*(TC[i].shmid), TC[i].cmd, TC[i].sbuf));
111 if (TEST_RETURN != -1) {
112 tst_resm(TFAIL, "shmctl succeeded "
113 "unexpectedly");
114 continue;
115 }
116 if (TEST_ERRNO == TC[i].error)
117 tst_resm(TPASS | TTERRNO, "shmctl failed "
118 "as expected");
119 else
120 tst_resm(TFAIL | TTERRNO, "shmctl failed "
121 "unexpectedly - expect errno = "
122 "%d, got", TC[i].error);
123 }
124 }
125 cleanup();
126 tst_exit();
127 }
128
setup(void)129 void setup(void)
130 {
131 long hpage_size;
132
133 tst_require_root();
134 check_hugepage();
135 tst_sig(NOFORK, DEF_HANDLER, cleanup);
136 tst_tmpdir();
137
138 orig_hugepages = get_sys_tune("nr_hugepages");
139 set_sys_tune("nr_hugepages", hugepages, 1);
140 hpage_size = read_meminfo("Hugepagesize:") * 1024;
141
142 shm_size = hpage_size * hugepages / 2;
143 update_shm_size(&shm_size);
144 shmkey = getipckey(cleanup);
145
146 /* create a shared memory segment without read or write permissions */
147 shm_id_1 = shmget(shmkey, shm_size, SHM_HUGETLB | IPC_CREAT | IPC_EXCL);
148 if (shm_id_1 == -1)
149 tst_brkm(TBROK | TERRNO, cleanup, "shmget #1");
150
151 /* create a shared memory segment with read and write permissions */
152 shm_id_2 = shmget(shmkey + 1, shm_size,
153 SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW);
154 if (shm_id_2 == -1)
155 tst_brkm(TBROK | TERRNO, cleanup, "shmget #2");
156
157 TEST_PAUSE;
158 }
159
cleanup(void)160 void cleanup(void)
161 {
162 rm_shm(shm_id_1);
163 rm_shm(shm_id_2);
164
165 set_sys_tune("nr_hugepages", orig_hugepages, 0);
166
167 tst_rmdir();
168 }
169