1/*
2 * Copyright (c) International Business Machines  Corp., 2004
3 * Copyright (c) Linux Test Project, 2004-2017
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
16/*
17 * DESCRIPTION
18 *	hugeshmat02 - check for EINVAL and EACCES errors with hugetlb
19 *
20 * ALGORITHM
21 *	loop if that option was specified
22 *	  call shmat() using three invalid test cases
23 *	  check the errno value
24 *	    issue a PASS message if we get EINVAL or EACCES
25 *	  otherwise, the tests fails
26 *	    issue a FAIL message
27 *	call cleanup
28 *
29 * HISTORY
30 *	03/2001 - Written by Wayne Boyer
31 *	04/2004 - Updated By Robbie Williamson
32 *
33 * RESTRICTIONS
34 *	Must be ran as root
35 */
36
37#include <pwd.h>
38#include <limits.h>
39#include "hugetlb.h"
40
41#if __WORDSIZE == 64
42#define NADDR	0x10000000eef	/* a 64bit non alligned address value */
43#else
44#define NADDR	0x60000eef	/* a non alligned address value */
45#endif
46
47static size_t shm_size;
48static int shm_id_1 = -1;
49static int shm_id_2 = -1;
50static void *addr;
51
52static long hugepages = 128;
53
54static struct tst_option options[] = {
55	{"s:", &nr_opt, "-s   num  Set the number of the been allocated hugepages"},
56	{NULL, NULL, NULL}
57};
58
59struct tcase {
60	int *shmid;
61	void *addr;
62	int error;
63} tcases[] = {
64	/* EINVAL - the shared memory ID is not valid */
65	{&shm_id_1, NULL, EINVAL},
66	/* EINVAL - the address is not page aligned and SHM_RND is not given */
67	{&shm_id_2, (void *)NADDR, EINVAL}
68};
69
70static void verify_hugeshmat(unsigned int i)
71{
72	struct tcase *tc = &tcases[i];
73
74	addr = shmat(*(tc->shmid), tc->addr, 0);
75	if (addr != (void *)-1) {
76		tst_res(TFAIL, "shmat suceeded unexpectedly");
77		return;
78	}
79
80	if (errno == tc->error) {
81		tst_res(TPASS | TERRNO, "shmat failed as "
82				"expected");
83	} else {
84		tst_res(TFAIL | TERRNO, "shmat failed "
85				"unexpectedly - expect errno=%d, "
86				"got", tc->error);
87	}
88}
89
90void setup(void)
91{
92	long hpage_size;
93
94	save_nr_hugepages();
95	if (nr_opt)
96		hugepages = SAFE_STRTOL(nr_opt, 0, LONG_MAX);
97
98	set_sys_tune("nr_hugepages", hugepages, 1);
99	hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
100
101	shm_size = hpage_size * hugepages / 2;
102	update_shm_size(&shm_size);
103	shmkey = getipckey();
104
105	/* create a shared memory resource with read and write permissions */
106	/* also post increment the shmkey for the next shmget call */
107	shm_id_2 = shmget(shmkey++, shm_size,
108			  SHM_HUGETLB | SHM_RW | IPC_CREAT | IPC_EXCL);
109	if (shm_id_2 == -1)
110		tst_brk(TBROK | TERRNO, "shmget");
111}
112
113void cleanup(void)
114{
115	rm_shm(shm_id_2);
116	restore_nr_hugepages();
117}
118
119static struct tst_test test = {
120	.needs_root = 1,
121	.needs_tmpdir = 1,
122	.options = options,
123	.tcnt = ARRAY_SIZE(tcases),
124	.test = verify_hugeshmat,
125	.setup = setup,
126	.cleanup = cleanup,
127};
128