1/*
2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <stdio.h>
29#include <stdint.h>
30#include <stdlib.h>
31#include <unistd.h>
32#include "flock.h"
33
34#define FILE_LEN 4096
35#define EINVAL_STR "-1 EINVAL (Invalid argument)"
36
37#define TEST_FLOCK_EINVAL(cmd) test_flock_einval(cmd, #cmd)
38
39#ifdef HAVE_TYPEOF
40# define TYPEOF_FLOCK_OFF_T typeof(((struct_kernel_flock *) NULL)->l_len)
41#else
42# define TYPEOF_FLOCK_OFF_T off_t
43#endif
44
45static long
46invoke_test_syscall(const unsigned int cmd, void *const p)
47{
48	const unsigned long op = (unsigned long) 0xffffffff00000000ULL | cmd;
49
50	return syscall(TEST_SYSCALL_NR, 0, op, (unsigned long) p);
51}
52
53static void
54test_flock_einval(const int cmd, const char *name)
55{
56	struct_kernel_flock fl = {
57		.l_type = F_RDLCK,
58		.l_start = (TYPEOF_FLOCK_OFF_T) 0xdefaced1facefeedULL,
59		.l_len = (TYPEOF_FLOCK_OFF_T) 0xdefaced2cafef00dULL
60	};
61	invoke_test_syscall(cmd, &fl);
62	printf("%s(0, %s, {l_type=F_RDLCK, l_whence=SEEK_SET"
63	       ", l_start=%jd, l_len=%jd}) = %s\n", TEST_SYSCALL_STR, name,
64	       (intmax_t) fl.l_start, (intmax_t) fl.l_len, EINVAL_STR);
65}
66
67static void
68test_flock(void)
69{
70	TEST_FLOCK_EINVAL(F_SETLK);
71	TEST_FLOCK_EINVAL(F_SETLKW);
72
73	struct_kernel_flock fl = {
74		.l_type = F_RDLCK,
75		.l_len = FILE_LEN
76	};
77	long rc = invoke_test_syscall(F_SETLK, &fl);
78	printf("%s(0, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET"
79	       ", l_start=0, l_len=%d}) = %s\n",
80	       TEST_SYSCALL_STR, FILE_LEN, rc ? EINVAL_STR : "0");
81	if (rc)
82		return;
83
84	invoke_test_syscall(F_GETLK, &fl);
85	printf("%s(0, F_GETLK, {l_type=F_UNLCK, l_whence=SEEK_SET"
86	       ", l_start=0, l_len=%d, l_pid=0}) = 0\n",
87	       TEST_SYSCALL_STR, FILE_LEN);
88
89	invoke_test_syscall(F_SETLK, &fl);
90	printf("%s(0, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET"
91	       ", l_start=0, l_len=%d}) = 0\n",
92	       TEST_SYSCALL_STR, FILE_LEN);
93}
94
95static void
96create_sample(void)
97{
98	char fname[] = TEST_SYSCALL_STR "_XXXXXX";
99
100	(void) close(0);
101	if (mkstemp(fname))
102		perror_msg_and_fail("mkstemp: %s", fname);
103	if (unlink(fname))
104		perror_msg_and_fail("unlink: %s", fname);
105	if (ftruncate(0, FILE_LEN))
106		perror_msg_and_fail("ftruncate");
107}
108