1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2004
4 * Copyright (c) Linux Test Project, 2004-2020
5 */
6
7 /*
8 * DESCRIPTION
9 * hugeshmctl02 - check for EACCES, EFAULT and EINVAL errors
10 *
11 * ALGORITHM
12 * create a large shared memory segment without read or write permissions
13 * create a large shared memory segment with read & write permissions
14 * loop if that option was specified
15 * call shmctl() using five different invalid cases
16 * check the errno value
17 * issue a PASS message if we get EACCES, EFAULT or EINVAL
18 * otherwise, the tests fails
19 * issue a FAIL message
20 * call cleanup
21 *
22 * HISTORY
23 * 03/2001 - Written by Wayne Boyer
24 * 04/2004 - Updated by Robbie Williamson
25 */
26
27 #include <pwd.h>
28 #include <limits.h>
29 #include "hugetlb.h"
30
31 static size_t shm_size;
32 static int shm_id_1 = -1;
33 static int shm_id_2 = -1;
34 static int shm_id_3 = -1;
35 static struct shmid_ds buf;
36
37 static struct tst_option options[] = {
38 {"s:", &nr_opt, "-s num Set the number of the been allocated hugepages"},
39 {NULL, NULL, NULL}
40 };
41
42 struct tcase {
43 int *shmid;
44 int cmd;
45 struct shmid_ds *sbuf;
46 int error;
47 } tcases[] = {
48 /* EFAULT - IPC_SET & buf isn't valid */
49 {&shm_id_2, IPC_SET, (struct shmid_ds *)-1, EFAULT},
50 /* EFAULT - IPC_STAT & buf isn't valid */
51 {&shm_id_2, IPC_STAT, (struct shmid_ds *)-1, EFAULT},
52 /* EINVAL - the shmid is not valid */
53 {&shm_id_3, IPC_STAT, &buf, EINVAL},
54 /* EINVAL - the command is not valid */
55 {&shm_id_2, -1, &buf, EINVAL},
56 };
57
test_hugeshmctl(unsigned int i)58 static void test_hugeshmctl(unsigned int i)
59 {
60 TEST(shmctl(*(tcases[i].shmid), tcases[i].cmd, tcases[i].sbuf));
61 if (TST_RET != -1) {
62 tst_res(TFAIL, "shmctl succeeded unexpectedly");
63 return;
64 }
65
66 if (TST_ERR == tcases[i].error) {
67 tst_res(TPASS | TTERRNO, "shmctl failed as expected");
68 return;
69 }
70
71 tst_res(TFAIL | TTERRNO,
72 "shmctl failed unexpectedly - expect errno = %d, got",
73 tcases[i].error);
74 }
75
setup(void)76 static void setup(void)
77 {
78 long hpage_size;
79
80 if (tst_hugepages == 0)
81 tst_brk(TCONF, "No enough hugepages for testing.");
82
83 hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
84
85 shm_size = hpage_size * (tst_hugepages / 2);
86 update_shm_size(&shm_size);
87 shmkey = getipckey();
88
89 /* create a shared memory segment without read or write permissions */
90 shm_id_1 = shmget(shmkey, shm_size, SHM_HUGETLB | IPC_CREAT | IPC_EXCL);
91 if (shm_id_1 == -1)
92 tst_brk(TBROK | TERRNO, "shmget #1");
93
94 /* create a shared memory segment with read and write permissions */
95 shm_id_2 = shmget(shmkey + 1, shm_size,
96 SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW);
97 if (shm_id_2 == -1)
98 tst_brk(TBROK | TERRNO, "shmget #2");
99 }
100
cleanup(void)101 static void cleanup(void)
102 {
103 rm_shm(shm_id_1);
104 rm_shm(shm_id_2);
105 }
106
107 static struct tst_test test = {
108 .test = test_hugeshmctl,
109 .tcnt = ARRAY_SIZE(tcases),
110 .needs_root = 1,
111 .needs_tmpdir = 1,
112 .options = options,
113 .setup = setup,
114 .cleanup = cleanup,
115 .request_hugepages = 128,
116 };
117