create_module01.c revision d6d11d08678aac1ed2c370ea8e42e5f45aea07be 
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
75static void setup(void);
76static void cleanup(void);
77
78char *TCID = "create_module01";	/* Test program identifier.    */
79int TST_TOTAL = 1;		/* Total number of test cases. */
80static char modname[20];	/* Name of the module */
81
82int 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 */
119void setup(void)
120{
121
122	tst_sig(NOFORK, DEF_HANDLER, cleanup);
123
124	tst_require_root(NULL);
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 */
146void 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