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 "tests.h"
30#include <asm/unistd.h>
31
32#ifdef __NR_sendfile
33
34# include <assert.h>
35# include <errno.h>
36# include <fcntl.h>
37# include <stdio.h>
38# include <stdint.h>
39# include <stdlib.h>
40# include <unistd.h>
41# include <sys/socket.h>
42
43int
44main(void)
45{
46	(void) close(0);
47	if (open("/dev/zero", O_RDONLY) != 0)
48		perror_msg_and_skip("open: %s", "/dev/zero");
49
50	int sv[2];
51	if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
52		perror_msg_and_skip("socketpair");
53
54	const unsigned int page_size = get_page_size();
55	assert(syscall(__NR_sendfile, 0, 1, NULL, page_size) == -1);
56	if (EBADF != errno)
57		perror_msg_and_skip("sendfile");
58	printf("sendfile(0, 1, NULL, %u) = -1 EBADF (%m)\n", page_size);
59
60	unsigned int file_size = 0;
61	socklen_t optlen = sizeof(file_size);
62	if (getsockopt(sv[1], SOL_SOCKET, SO_SNDBUF, &file_size, &optlen))
63		perror_msg_and_fail("getsockopt");
64	if (file_size < 1024)
65		error_msg_and_skip("SO_SNDBUF too small: %u", file_size);
66
67	file_size /= 4;
68	if (file_size / 16 > page_size)
69		file_size = page_size * 16;
70	const unsigned int blen = file_size / 3;
71	const unsigned int alen = file_size - blen;
72
73	static const char fname[] = "sendfile-tmpfile";
74	int reg_in = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0600);
75	if (reg_in < 0)
76		perror_msg_and_fail("open: %s", fname);
77	if (unlink(fname))
78		perror_msg_and_fail("unlink: %s", fname);
79	if (ftruncate(reg_in, file_size))
80		perror_msg_and_fail("ftruncate: %s", fname);
81
82	TAIL_ALLOC_OBJECT_VAR_PTR(uint32_t, p_off);
83	void *p = p_off + 1;
84	*p_off = 0;
85
86	assert(syscall(__NR_sendfile, 0, 1, p, page_size) == -1);
87	printf("sendfile(0, 1, %p, %u) = -1 EFAULT (%m)\n", p, page_size);
88
89	assert(syscall(__NR_sendfile, sv[1], reg_in, NULL, alen)
90	       == (long) alen);
91	printf("sendfile(%d, %d, NULL, %u) = %u\n",
92	       sv[1], reg_in, alen, alen);
93
94	p = p_off;
95	if (syscall(__NR_sendfile, sv[1], reg_in, p_off, alen) != (long) alen) {
96		printf("sendfile(%d, %d, %#lx, %u) = -1 EFAULT (%m)\n",
97		       sv[1], reg_in, (unsigned long) p_off, alen);
98		--p_off;
99		*p_off = 0;
100		assert(syscall(__NR_sendfile, sv[1], reg_in, p_off, alen)
101		       == (long) alen);
102	}
103	printf("sendfile(%d, %d, [0] => [%u], %u) = %u\n",
104	       sv[1], reg_in, alen, alen, alen);
105
106	assert(syscall(__NR_sendfile, sv[1], reg_in, p_off, file_size + 1)
107	       == (long) blen);
108	printf("sendfile(%d, %d, [%u] => [%u], %u) = %u\n",
109	       sv[1], reg_in, alen, file_size, file_size + 1, blen);
110
111	if (p_off != p) {
112		uint64_t *p_off64 = (uint64_t *) p_off;
113		*p_off64 = 0xcafef00dfacefeedULL;
114		assert(syscall(__NR_sendfile, sv[1], reg_in, p_off64, 1) == -1);
115		printf("sendfile(%d, %d, [14627392582579060461], 1)"
116		       " = -1 EINVAL (%m)\n", sv[1], reg_in);
117		*p_off64 = 0xdefaced;
118	} else {
119		*p_off = 0xdefaced;
120	}
121	assert(syscall(__NR_sendfile, sv[1], reg_in, p_off, 1) == 0);
122	printf("sendfile(%d, %d, [233811181], 1) = 0\n",
123	       sv[1], reg_in);
124
125	puts("+++ exited with 0 +++");
126	return 0;
127}
128
129#else
130
131SKIP_MAIN_UNDEFINED("__NR_sendfile")
132
133#endif
134