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
47 static size_t shm_size;
48 static int shm_id_1 = -1;
49 static int shm_id_2 = -1;
50 static void *addr;
51
52 static long hugepages = 128;
53
54 static struct tst_option options[] = {
55 {"s:", &nr_opt, "-s num Set the number of the been allocated hugepages"},
56 {NULL, NULL, NULL}
57 };
58
59 struct 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
verify_hugeshmat(unsigned int i)70 static 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
setup(void)90 void 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
cleanup(void)113 void cleanup(void)
114 {
115 rm_shm(shm_id_2);
116 restore_nr_hugepages();
117 }
118
119 static 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