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annotate usr/src/test/zfs-tests/cmd/rm_lnkcnt_zero_file/rm_lnkcnt_zero_file.c @ 13899:0bcf78798346

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3311 Want a test framework for arbitrary OS unit tests 3312 Add a testrunner package for OS unit tests 3313 Add a testrunner package to convert ZFS tests from STF Reviewed by: Matt Ahrens <matthew.ahrens@delphix.com> Reviewed by: Will Guyette <will.guyette@delphix.com> Reviewed by: Dan Kimmel <dan.kimmel@delphix.com> Reviewed by: Adam Leventhal <ahl@delphix.com> Reviewed by: Henrik Mattson <henrik.mattson@delphix.com> Reviewed by: Sonu Pillai <sonu.pillai@delphix.com> Reviewed by: Christopher Siden <chris.siden@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Richard Lowe <richlowe@richlowe.net> Approved by: Richard Lowe <richlowe@richlowe.net>
author John Wren Kennedy <john.kennedy@delphix.com>
date Wed, 05 Dec 2012 22:04:50 -0500
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13899
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1 /*
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2 * CDDL HEADER START
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3 *
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4 * The contents of this file are subject to the terms of the
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5 * Common Development and Distribution License (the "License").
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6 * You may not use this file except in compliance with the License.
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7 *
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8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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9 * or http://www.opensolaris.org/os/licensing.
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10 * See the License for the specific language governing permissions
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11 * and limitations under the License.
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12 *
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13 * When distributing Covered Code, include this CDDL HEADER in each
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14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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15 * If applicable, add the following below this CDDL HEADER, with the
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16 * fields enclosed by brackets "[]" replaced with your own identifying
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17 * information: Portions Copyright [yyyy] [name of copyright owner]
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18 *
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19 * CDDL HEADER END
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20 */
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21
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22 /*
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23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
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24 * Use is subject to license terms.
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25 */
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26
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27 /*
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28 * Copyright (c) 2012 by Delphix. All rights reserved.
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29 */
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30
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31 /*
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32 * --------------------------------------------------------------------
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33 * The purpose of this test is to see if the bug reported (#4723351) for
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34 * UFS exists when using a ZFS file system.
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35 * --------------------------------------------------------------------
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36 *
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37 */
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38 #define _REENTRANT 1
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39 #include <stdio.h>
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40 #include <fcntl.h>
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41 #include <pthread.h>
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42 #include <thread.h>
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43 #include <errno.h>
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44 #include <sys/types.h>
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45 #include <sys/stat.h>
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46 #include <stdlib.h>
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47 #include <unistd.h>
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48 #include <strings.h>
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49
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50 static const int TRUE = 1;
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51 static char *filebase;
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52
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53 static int
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54 pickidx()
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55 {
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56 return (random() % 1000);
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57 }
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58
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59 /* ARGSUSED */
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60 static void *
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61 mover(void *a)
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62 {
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63 char buf[256];
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64 int idx, len, ret;
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65
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66 len = strlen(filebase) + 5;
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67
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68 while (TRUE) {
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69 idx = pickidx();
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70 (void) snprintf(buf, len, "%s.%03d", filebase, idx);
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71 ret = rename(filebase, buf);
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72 if (ret < 0 && errno != ENOENT)
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73 (void) perror("renaming file");
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74 }
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75
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76 return (NULL);
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77 }
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78
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79 /* ARGSUSED */
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80 static void *
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81 cleaner(void *a)
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82 {
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83 char buf[256];
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84 int idx, len, ret;
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85
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86 len = strlen(filebase) + 5;
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87
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88 while (TRUE) {
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89 idx = pickidx();
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90 (void) snprintf(buf, len, "%s.%03d", filebase, idx);
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91 ret = remove(buf);
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92 if (ret < 0 && errno != ENOENT)
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93 (void) perror("removing file");
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94 }
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95
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96 return (NULL);
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97 }
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98
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99 static void *
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100 writer(void *a)
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101 {
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102 int *fd = (int *)a;
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103
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104 while (TRUE) {
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105 (void) close (*fd);
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106 *fd = open(filebase, O_APPEND | O_RDWR | O_CREAT, 0644);
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107 if (*fd < 0)
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108 perror("refreshing file");
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109 (void) write(*fd, "test\n", 5);
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110 }
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111
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112 return (NULL);
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113 }
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114
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115 int
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116 main(int argc, char **argv)
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117 {
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118 int fd;
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119 pthread_t tid;
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120
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121 if (argc == 1) {
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122 (void) printf("Usage: %s <filebase>\n", argv[0]);
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123 exit(-1);
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124 }
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125
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126 filebase = argv[1];
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127 fd = open(filebase, O_APPEND | O_RDWR | O_CREAT, 0644);
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128 if (fd < 0) {
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129 perror("creating test file");
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130 exit(-1);
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131 }
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132
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133 (void) thr_setconcurrency(4); /* 3 threads + main */
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134 (void) pthread_create(&tid, NULL, mover, NULL);
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135 (void) pthread_create(&tid, NULL, cleaner, NULL);
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136 (void) pthread_create(&tid, NULL, writer, (void *) &fd);
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137
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138 while (TRUE) {
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139 int ret;
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140 struct stat st;
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141
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142 ret = stat(filebase, &st);
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143 if (ret == 0 && (st.st_nlink > 2 || st.st_nlink < 1)) {
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144 (void) printf("st.st_nlink = %d, exiting\n", \
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145 (int)st.st_nlink);
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146 exit(0);
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147 }
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148 (void) sleep(1);
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149 }
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150
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151 return (0);
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152 }