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 tcase {
23 int *skey;
24 int size_coe;
25 int flags;
26 int error;
27 } tcases[] = {
28 /* EINVAL - size is 0 */
29 {&shmkey2, 0, SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW, EINVAL},
30 /* EINVAL - size is larger than created segment */
31 {&shmkey, 2, SHM_HUGETLB | SHM_RW, EINVAL},
32 /* EEXIST - the segment exists and IPC_CREAT | IPC_EXCL is given */
33 {&shmkey, 1, SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW, EEXIST},
34 /* ENOENT - no segment exists for the key and IPC_CREAT is not given */
35 /* use shm_nonexistend_key (-1) as the key */
36 {&shm_nonexistent_key, 1, SHM_HUGETLB | SHM_RW, ENOENT}
37 };
38
test_hugeshmget(unsigned int i)39 static void test_hugeshmget(unsigned int i)
40 {
41 int shm_id_2 = -1;
42
43 if (*tcases[i].skey == -1) {
44 shm_id_2 = shmget(*(tcases[i].skey), 0, 0);
45 if (shm_id_2 != -1)
46 shmctl(shm_id_2, IPC_RMID, NULL);
47 }
48
49 TEST(shmget(*(tcases[i].skey), tcases[i].size_coe * shm_size,
50 tcases[i].flags));
51 if (TST_RET != -1) {
52 tst_res(TFAIL, "shmget succeeded unexpectedly");
53 return;
54 }
55
56 if (TST_ERR != tcases[i].error) {
57 tst_res(TFAIL | TTERRNO,
58 "shmget failed unexpectedly, expected %s",
59 tst_strerrno(tcases[i].error));
60 return;
61 }
62
63 tst_res(TPASS | TTERRNO, "shmget failed as expected");
64 }
65
setup(void)66 void setup(void)
67 {
68 long hpage_size;
69
70 if (tst_hugepages == 0)
71 tst_brk(TCONF, "No enough hugepages for testing.");
72
73 hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
74
75 shm_size = hpage_size * tst_hugepages / 2;
76 update_shm_size(&shm_size);
77
78 shmkey = getipckey();
79 shmkey2 = shmkey + 1;
80 shm_id_1 = shmget(shmkey, shm_size,
81 SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW);
82 if (shm_id_1 == -1)
83 tst_brk(TBROK | TERRNO, "shmget #setup");
84 }
85
cleanup(void)86 void cleanup(void)
87 {
88 rm_shm(shm_id_1);
89 }
90
91 static struct tst_test test = {
92 .needs_root = 1,
93 .options = (struct tst_option[]) {
94 {"s:", &nr_opt, "Set the number of the been allocated hugepages"},
95 {}
96 },
97 .setup = setup,
98 .cleanup = cleanup,
99 .test = test_hugeshmget,
100 .tcnt = ARRAY_SIZE(tcases),
101 .hugepages = {128, TST_REQUEST},
102 };
103