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1 /*
2  * Copyright (c) 2014 Fujitsu Ltd.
3  * Author: Xing Gu <gux.fnst@cn.fujitsu.com>
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of version 2 of the GNU General Public License as
7  * published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it would be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12  *
13  * You should have received a copy of the GNU General Public License along
14  * with this program; if not, write the Free Software Foundation, Inc.,
15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16  */
17 /*
18  * Description:
19  *   Verify that,
20  *   1) vmsplice() returns -1 and sets errno to EBADF if fd
21  *      is not valid.
22  *   2) vmsplice() returns -1 and sets errno to EBADF if fd
23  *      doesn't refer to a pipe.
24  *   3) vmsplice() returns -1 and sets errno to EINVAL if
25  *      nr_segs is greater than IOV_MAX.
26  */
27 
28 #define _GNU_SOURCE
29 
30 #include <sys/types.h>
31 #include <sys/stat.h>
32 #include <fcntl.h>
33 #include <unistd.h>
34 #include <fcntl.h>
35 #include <sys/uio.h>
36 #include <limits.h>
37 
38 #include "tst_test.h"
39 #include "lapi/syscalls.h"
40 #include "lapi/fcntl.h"
41 #include "lapi/vmsplice.h"
42 
43 #include "limits_ltp.h"
44 
45 #define TESTFILE "testfile"
46 
47 #define TEST_BLOCK_SIZE 128
48 
49 static char buffer[TEST_BLOCK_SIZE];
50 static int notvalidfd = -1;
51 static int filefd;
52 static int pipes[2];
53 static struct iovec ivc;
54 
55 static struct tcase {
56 	int *fd;
57 	const struct iovec *iov;
58 	unsigned long nr_segs;
59 	int exp_errno;
60 } tcases[] = {
61 	{ &notvalidfd, &ivc, 1, EBADF },
62 	{ &filefd, &ivc, 1, EBADF },
63 	{ &pipes[1], &ivc, IOV_MAX + 1, EINVAL },
64 };
65 
setup(void)66 static void setup(void)
67 {
68 	if (tst_fs_type(".") == TST_NFS_MAGIC) {
69 		tst_brk(TCONF, "Cannot do splice() "
70 			"on a file located on an NFS filesystem");
71 	}
72 
73 	filefd = SAFE_OPEN(TESTFILE, O_WRONLY | O_CREAT, 0644);
74 
75 	SAFE_PIPE(pipes);
76 
77 	ivc.iov_base = buffer;
78 	ivc.iov_len = TEST_BLOCK_SIZE;
79 }
80 
vmsplice_verify(unsigned int n)81 static void vmsplice_verify(unsigned int n)
82 {
83 	struct tcase *tc = &tcases[n];
84 
85 	TEST(vmsplice(*(tc->fd), tc->iov, tc->nr_segs, 0));
86 
87 	if (TEST_RETURN != -1) {
88 		tst_res(TFAIL, "vmsplice() returned %ld, "
89 			"expected -1, errno:%d", TEST_RETURN,
90 			tc->exp_errno);
91 		return;
92 	}
93 
94 	if (TEST_ERRNO != tc->exp_errno) {
95 		tst_res(TFAIL | TTERRNO,
96 			"vmsplice() failed unexpectedly; expected: %d - %s",
97 			tc->exp_errno, tst_strerrno(tc->exp_errno));
98 		return;
99 	}
100 
101 	tst_res(TPASS | TTERRNO, "vmsplice() failed as expected");
102 }
103 
cleanup(void)104 static void cleanup(void)
105 {
106 	if (filefd > 0)
107 		SAFE_CLOSE(filefd);
108 
109 	if (pipes[0] > 0)
110 		SAFE_CLOSE(pipes[0]);
111 
112 	if (pipes[1] > 0)
113 		SAFE_CLOSE(pipes[1]);
114 }
115 
116 static struct tst_test test = {
117 	.setup = setup,
118 	.cleanup = cleanup,
119 	.test = vmsplice_verify,
120 	.tcnt = ARRAY_SIZE(tcases),
121 	.needs_tmpdir = 1,
122 	.min_kver = "2.6.17",
123 };
124