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 * DESCRIPTION
7 * hugeshmat02 - check for EINVAL and EACCES errors with hugetlb
8 *
9 * ALGORITHM
10 * loop if that option was specified
11 * call shmat() using three invalid test cases
12 * check the errno value
13 * issue a PASS message if we get EINVAL or EACCES
14 * otherwise, the tests fails
15 * issue a FAIL message
16 * call cleanup
17 *
18 * HISTORY
19 * 03/2001 - Written by Wayne Boyer
20 * 04/2004 - Updated By Robbie Williamson
21 *
22 * RESTRICTIONS
23 * Must be ran as root
24 */
25
26 #include <pwd.h>
27 #include <limits.h>
28 #include "lapi/abisize.h"
29 #include "hugetlb.h"
30
31 #ifdef TST_ABI64
32 #define NADDR 0x10000000eef /* a 64bit non alligned address value */
33 #else
34 #define NADDR 0x60000eef /* a non alligned address value */
35 #endif
36
37 static size_t shm_size;
38 static int shm_id_1 = -1;
39 static int shm_id_2 = -1;
40 static void *addr;
41
42 struct tcase {
43 int *shmid;
44 void *addr;
45 int error;
46 } tcases[] = {
47 /* EINVAL - the shared memory ID is not valid */
48 {&shm_id_1, NULL, EINVAL},
49 /* EINVAL - the address is not page aligned and SHM_RND is not given */
50 {&shm_id_2, (void *)NADDR, EINVAL}
51 };
52
verify_hugeshmat(unsigned int i)53 static void verify_hugeshmat(unsigned int i)
54 {
55 struct tcase *tc = &tcases[i];
56
57 addr = shmat(*(tc->shmid), tc->addr, 0);
58 if (addr != (void *)-1) {
59 tst_res(TFAIL, "shmat suceeded unexpectedly");
60 return;
61 }
62
63 if (errno == tc->error) {
64 tst_res(TPASS | TERRNO, "shmat failed as "
65 "expected");
66 } else {
67 tst_res(TFAIL | TERRNO, "shmat failed "
68 "unexpectedly - expect errno=%d, "
69 "got", tc->error);
70 }
71 }
72
setup(void)73 void setup(void)
74 {
75 long hpage_size;
76
77 if (tst_hugepages == 0)
78 tst_brk(TCONF, "No enough hugepages for testing.");
79
80 hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
81
82 shm_size = hpage_size * tst_hugepages / 2;
83 update_shm_size(&shm_size);
84 shmkey = getipckey();
85
86 /* create a shared memory resource with read and write permissions */
87 /* also post increment the shmkey for the next shmget call */
88 shm_id_2 = shmget(shmkey++, shm_size,
89 SHM_HUGETLB | SHM_RW | IPC_CREAT | IPC_EXCL);
90 if (shm_id_2 == -1)
91 tst_brk(TBROK | TERRNO, "shmget");
92 }
93
cleanup(void)94 void cleanup(void)
95 {
96 rm_shm(shm_id_2);
97 }
98
99 static struct tst_test test = {
100 .needs_root = 1,
101 .needs_tmpdir = 1,
102 .options = (struct tst_option[]) {
103 {"s:", &nr_opt, "Set the number of the been allocated hugepages"},
104 {}
105 },
106 .tcnt = ARRAY_SIZE(tcases),
107 .test = verify_hugeshmat,
108 .setup = setup,
109 .cleanup = cleanup,
110 .hugepages = {128, TST_REQUEST},
111 };
112