1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2004
4 * Copyright (c) Linux Test Project, 2004-2017
5 *
6 *
7 * DESCRIPTION
8 * hugeshmget02 - check for ENOENT, EEXIST and EINVAL errors
9 *
10 * HISTORY
11 * 03/2001 - Written by Wayne Boyer
12 * 04/2004 - Updated by Robbie Williamson
13 */
14 #include <limits.h>
15 #include "hugetlb.h"
16
17 static size_t shm_size;
18 static int shm_id_1 = -1;
19 static int shm_nonexistent_key = -1;
20 static key_t shmkey2;
21
22 static struct tst_option options[] = {
23 {"s:", &nr_opt, "-s num Set the number of the been allocated hugepages"},
24 {NULL, NULL, NULL}
25 };
26
27 static struct tcase {
28 int *skey;
29 int size_coe;
30 int flags;
31 int error;
32 } tcases[] = {
33 /* EINVAL - size is 0 */
34 {&shmkey2, 0, SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW, EINVAL},
35 /* EINVAL - size is larger than created segment */
36 {&shmkey, 2, SHM_HUGETLB | SHM_RW, EINVAL},
37 /* EEXIST - the segment exists and IPC_CREAT | IPC_EXCL is given */
38 {&shmkey, 1, SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW, EEXIST},
39 /* ENOENT - no segment exists for the key and IPC_CREAT is not given */
40 /* use shm_nonexistend_key (-1) as the key */
41 {&shm_nonexistent_key, 1, SHM_HUGETLB | SHM_RW, ENOENT}
42 };
43
test_hugeshmget(unsigned int i)44 static void test_hugeshmget(unsigned int i)
45 {
46 int shm_id_2 = -1;
47
48 if (*tcases[i].skey == -1) {
49 shm_id_2 = shmget(*(tcases[i].skey), 0, 0);
50 if (shm_id_2 != -1)
51 shmctl(shm_id_2, IPC_RMID, NULL);
52 }
53
54 TEST(shmget(*(tcases[i].skey), tcases[i].size_coe * shm_size,
55 tcases[i].flags));
56 if (TST_RET != -1) {
57 tst_res(TFAIL, "shmget succeeded unexpectedly");
58 return;
59 }
60
61 if (TST_ERR != tcases[i].error) {
62 tst_res(TFAIL | TTERRNO,
63 "shmget failed unexpectedly, expected %s",
64 tst_strerrno(tcases[i].error));
65 return;
66 }
67
68 tst_res(TPASS | TTERRNO, "shmget failed as expected");
69 }
70
setup(void)71 void setup(void)
72 {
73 long hpage_size;
74
75 if (tst_hugepages == 0)
76 tst_brk(TCONF, "No enough hugepages for testing.");
77
78 hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
79
80 shm_size = hpage_size * tst_hugepages / 2;
81 update_shm_size(&shm_size);
82
83 shmkey = getipckey();
84 shmkey2 = shmkey + 1;
85 shm_id_1 = shmget(shmkey, shm_size,
86 SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW);
87 if (shm_id_1 == -1)
88 tst_brk(TBROK | TERRNO, "shmget #setup");
89 }
90
cleanup(void)91 void cleanup(void)
92 {
93 rm_shm(shm_id_1);
94 }
95
96 static struct tst_test test = {
97 .needs_root = 1,
98 .options = options,
99 .setup = setup,
100 .cleanup = cleanup,
101 .test = test_hugeshmget,
102 .tcnt = ARRAY_SIZE(tcases),
103 .request_hugepages = 128,
104 };
105