1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2020 Joyent, Inc.
14 */
15
16 /*
17 * Test the open(2) syscall.
18 *
19 * Currently only tests O_DIRECT pass/fail based on the known support in the
20 * underlying file system.
21 *
22 * Note: there is a test for the O_DIRECTORY flag in the directory above this
23 * which could be consolidated into this code at some point.
24 */
25
26 #include <stdio.h>
27 #include <sys/types.h>
28 #include <sys/stat.h>
29 #include <sys/statvfs.h>
30 #include <sys/param.h>
31 #include <fcntl.h>
32 #include <errno.h>
33 #include <unistd.h>
34 #include <stdlib.h>
35 #include <string.h>
36
37 static void
o_direct_test(const char * dir)38 o_direct_test(const char *dir)
39 {
40 int fd;
41 struct statvfs64 buf;
42 char tmpname[MAXPATHLEN];
43 char *path;
44
45 boolean_t pass;
46
47 (void) snprintf(tmpname, sizeof (tmpname), "%s/otstXXXXXX", dir);
48 if ((path = mktemp(tmpname)) == NULL) {
49 (void) printf("FAILED: unable to create temp file name\n");
50 exit(1);
51 }
52
53 if (statvfs64(dir, &buf) == -1) {
54 perror("statvfs failed");
55 exit(1);
56 }
57
58 if (strcmp(buf.f_basetype, "zfs") == 0) {
59 pass = B_TRUE;
60 } else if (strcmp(buf.f_basetype, "tmpfs") == 0) {
61 pass = B_FALSE;
62 } else {
63 (void) printf("SKIP: expected 'zfs' or 'tmpfs'\n");
64 return;
65 }
66
67 fd = open(path, O_WRONLY | O_CREAT | O_EXCL | O_DIRECT, 0644);
68 if (fd >= 0) {
69 (void) close(fd);
70 (void) unlink(path);
71 if (!pass) {
72 (void) printf("FAILED: O_DIRECT on %s/tst_open is "
73 "expected to fail\n", dir);
74 exit(1);
75 }
76 } else {
77 if (pass) {
78 (void) printf("FAILED: O_DIRECT on %s/tst_open is "
79 "expected to succeed\n", dir);
80 exit(1);
81 }
82
83 if (errno != EINVAL) {
84 (void) printf("FAILED: expected EINVAL, got %d\n",
85 errno);
86 exit(1);
87 }
88 }
89 }
90
91 int
main(void)92 main(void)
93 {
94 /* On typical illumos distros, /tmp is tmpfs, O_DIRECT should fail */
95 o_direct_test("/tmp");
96
97 /* On typical illumos distros, /var is zfs, O_DIRECT should pass */
98 o_direct_test("/var/tmp");
99
100 (void) printf("PASS\n");
101 return (0);
102 }
103