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
17static size_t shm_size;
18static int shm_id_1 = -1;
19static int shm_nonexistent_key = -1;
20static key_t shmkey2;
21
22static 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
39static 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
66void 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
86void cleanup(void)
87{
88	rm_shm(shm_id_1);
89}
90
91static 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