1 /*
2 * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * You should have received a copy of the GNU General Public License along
13 * with this program; if not, write the Free Software Foundation, Inc.,
14 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
15 *
16 */
17 /**********************************************************
18 *
19 * TEST IDENTIFIER : create_module01
20 *
21 * EXECUTED BY : root / superuser
22 *
23 * TEST TITLE : Basic tests for create_module(2)
24 *
25 * TEST CASE TOTAL : 1
26 *
27 * AUTHOR : Madhu T L <madhu.tarikere@wipro.com>
28 *
29 * SIGNALS
30 * Uses SIGUSR1 to pause before test if option set.
31 * (See the parse_opts(3) man page).
32 *
33 * DESCRIPTION
34 * This is a Phase I test for the create_module(2) system call.
35 * It is intended to provide a limited exposure of the system call.
36 *
37 * Setup:
38 * Setup signal handling.
39 * Test caller is superuser
40 * Pause for SIGUSR1 if option specified.
41 * Initialize modname for each child process
42 *
43 * Test:
44 * Loop if the proper options are given.
45 * Execute system call
46 * Check return code, if system call failed (return=-1)
47 * Issue FAIL message with errno.
48 * Otherwise, Issue PASS message and delete the module entry.
49 *
50 * Cleanup:
51 * Call delete_module system call to remove module entry if exists.
52 * Print errno log and/or timing stats if options given
53 *
54 * USAGE: <for command-line>
55 * create_module01 [-c n] [-e] [-f] [-h] [-i n] [-I x] [-p] [-P x] [-t]
56 * where, -c n : Run n copies concurrently.
57 * -e : Turn on errno logging.
58 * -f : Turn off functional testing
59 * -h : Show help screen
60 * -i n : Execute test n times.
61 * -I x : Execute test for x seconds.
62 * -p : Pause for SIGUSR1 before starting
63 * -P x : Pause for x seconds between iterations.
64 * -t : Turn on syscall timing.
65 *
66 ****************************************************************/
67 #include <errno.h>
68 #include <asm/atomic.h>
69 #include <linux/module.h>
70 #include "test.h"
71
72 #define MODSIZE 10000 /* Arbitrarily selected MODSIZE */
73 #define BASEMODNAME "dummy"
74
75 static void setup(void);
76 static void cleanup(void);
77
78 char *TCID = "create_module01"; /* Test program identifier. */
79 int TST_TOTAL = 1; /* Total number of test cases. */
80 static char modname[20]; /* Name of the module */
81
main(int argc,char ** argv)82 int main(int argc, char **argv)
83 {
84 int lc;
85
86 tst_parse_opts(argc, argv, NULL, NULL);
87
88 setup();
89
90 for (lc = 0; TEST_LOOPING(lc); lc++) {
91
92 /* reset tst_count in case we are looping */
93 tst_count = 0;
94
95 /* Test the system call */
96 TEST(create_module(modname, MODSIZE));
97
98 /* check return code */
99 if (TEST_RETURN == -1) {
100 tst_resm(TFAIL, "create_module() failed errno=%d : %s",
101 TEST_ERRNO, strerror(TEST_ERRNO));
102 } else {
103 tst_resm(TPASS, "create_module() returned 0x%x",
104 TEST_RETURN);
105 if (delete_module(modname) != 0) {
106 tst_brkm(TBROK, NULL, "Failed to delete"
107 "loadable module entry for %s",
108 modname);
109 }
110 }
111 }
112
113 /* perform global cleanup and exit */
114 cleanup();
115
116 }
117
118 /* setup() - performs all ONE TIME setup for this test */
setup(void)119 void setup(void)
120 {
121
122 tst_sig(NOFORK, DEF_HANDLER, cleanup);
123
124 tst_require_root();
125
126 if (tst_kvercmp(2, 5, 48) >= 0)
127 tst_brkm(TCONF, NULL, "This test will not work on "
128 "kernels after 2.5.48");
129
130 /* Pause if that option was specified
131 * TEST_PAUSE contains the code to fork the test with the -c option.
132 */
133 TEST_PAUSE;
134
135 /* Initialize unique module name for each child process */
136 if (sprintf(modname, "%s_%d", BASEMODNAME, getpid()) == -1) {
137 tst_brkm(TBROK, NULL, "Failed to initialize module name");
138 }
139 }
140
141 /*
142 * cleanup()
143 * performs all ONE TIME cleanup for this test at
144 * completion or premature exit
145 */
cleanup(void)146 void cleanup(void)
147 {
148 /*
149 * If module entry is not removed (possible if create_module()
150 * succeeds and signal is caught before execution of delete_module())
151 * attempt to remove it here
152 */
153 if (delete_module(modname) == -1) {
154 /* With errno, check module exists, if so send msg */
155 if (errno != ENOENT) {
156 tst_resm(TWARN, "Failed to delete loadable module"
157 "entry for %s errno returned %d", modname,
158 errno);
159 }
160 }
161
162 }
163