1/*
2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
3 * Copyright (c) 2015-2017 The strace developers.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <stdio.h>
30#include <stdint.h>
31#include <stdlib.h>
32#include <unistd.h>
33#include "flock.h"
34
35#define FILE_LEN 4096
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 kernel_ulong_t fd = F8ILL_KULONG_MASK;
49	const kernel_ulong_t op = F8ILL_KULONG_MASK | cmd;
50
51	return syscall(TEST_SYSCALL_NR, fd, op, (unsigned long) p);
52}
53
54static void
55test_flock_einval(const int cmd, const char *name)
56{
57	struct_kernel_flock fl = {
58		.l_type = F_RDLCK,
59		.l_start = (TYPEOF_FLOCK_OFF_T) 0xdefaced1facefeedULL,
60		.l_len = (TYPEOF_FLOCK_OFF_T) 0xdefaced2cafef00dULL
61	};
62	long rc = invoke_test_syscall(cmd, &fl);
63	printf("%s(0, %s, {l_type=F_RDLCK, l_whence=SEEK_SET"
64	       ", l_start=%jd, l_len=%jd}) = %s\n", TEST_SYSCALL_STR, name,
65	       (intmax_t) fl.l_start, (intmax_t) fl.l_len, sprintrc(rc));
66}
67
68static void
69test_flock(void)
70{
71	TEST_FLOCK_EINVAL(F_SETLK);
72	TEST_FLOCK_EINVAL(F_SETLKW);
73
74	struct_kernel_flock fl = {
75		.l_type = F_RDLCK,
76		.l_len = FILE_LEN
77	};
78	long rc = invoke_test_syscall(F_SETLK, &fl);
79	printf("%s(0, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET"
80	       ", l_start=0, l_len=%d}) = %s\n",
81	       TEST_SYSCALL_STR, FILE_LEN, sprintrc(rc));
82	if (rc)
83		return;
84
85	invoke_test_syscall(F_GETLK, &fl);
86	printf("%s(0, F_GETLK, {l_type=F_UNLCK, l_whence=SEEK_SET"
87	       ", l_start=0, l_len=%d, l_pid=0}) = 0\n",
88	       TEST_SYSCALL_STR, FILE_LEN);
89
90	invoke_test_syscall(F_SETLK, &fl);
91	printf("%s(0, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET"
92	       ", l_start=0, l_len=%d}) = 0\n",
93	       TEST_SYSCALL_STR, FILE_LEN);
94}
95
96static void
97create_sample(void)
98{
99	char fname[] = TEST_SYSCALL_STR "_XXXXXX";
100
101	(void) close(0);
102	if (mkstemp(fname))
103		perror_msg_and_fail("mkstemp: %s", fname);
104	if (unlink(fname))
105		perror_msg_and_fail("unlink: %s", fname);
106	if (ftruncate(0, FILE_LEN))
107		perror_msg_and_fail("ftruncate");
108}
109