1 | /* $Id: aiomgr.cpp 64766 2016-11-30 10:59:48Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - Async I/O manager.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2013-2016 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | *
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17 | * The contents of this file may alternatively be used under the terms
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18 | * of the Common Development and Distribution License Version 1.0
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19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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20 | * VirtualBox OSE distribution, in which case the provisions of the
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21 | * CDDL are applicable instead of those of the GPL.
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22 | *
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23 | * You may elect to license modified versions of this file under the
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24 | * terms and conditions of either the GPL or the CDDL or both.
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25 | */
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26 |
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27 |
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28 | /*********************************************************************************************************************************
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29 | * Header Files *
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30 | *********************************************************************************************************************************/
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31 |
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32 | #include <iprt/aiomgr.h>
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33 | #include <iprt/err.h>
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34 | #include <iprt/asm.h>
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35 | #include <iprt/mem.h>
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36 | #include <iprt/file.h>
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37 | #include <iprt/list.h>
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38 | #include <iprt/thread.h>
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39 | #include <iprt/assert.h>
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40 | #include <iprt/string.h>
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41 | #include <iprt/critsect.h>
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42 | #include <iprt/memcache.h>
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43 | #include <iprt/semaphore.h>
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44 | #include <iprt/queueatomic.h>
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45 |
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46 | #include "internal/magics.h"
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47 |
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48 |
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49 | /*********************************************************************************************************************************
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50 | * Structures and Typedefs *
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51 | *********************************************************************************************************************************/
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52 |
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53 | /** Pointer to an internal async I/O file instance. */
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54 | typedef struct RTAIOMGRFILEINT *PRTAIOMGRFILEINT;
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55 |
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56 | /**
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57 | * Blocking event types.
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58 | */
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59 | typedef enum RTAIOMGREVENT
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60 | {
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61 | /** Invalid tye */
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62 | RTAIOMGREVENT_INVALID = 0,
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63 | /** No event pending. */
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64 | RTAIOMGREVENT_NO_EVENT,
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65 | /** A file is added to the manager. */
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66 | RTAIOMGREVENT_FILE_ADD,
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67 | /** A file is about to be closed. */
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68 | RTAIOMGREVENT_FILE_CLOSE,
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69 | /** The async I/O manager is shut down. */
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70 | RTAIOMGREVENT_SHUTDOWN,
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71 | /** 32bit hack */
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72 | RTAIOMGREVENT_32BIT_HACK = 0x7fffffff
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73 | } RTAIOMGREVENT;
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74 |
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75 | /**
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76 | * Async I/O manager instance data.
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77 | */
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78 | typedef struct RTAIOMGRINT
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79 | {
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80 | /** Magic value. */
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81 | uint32_t u32Magic;
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82 | /** Reference count. */
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83 | volatile uint32_t cRefs;
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84 | /** Async I/O context handle. */
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85 | RTFILEAIOCTX hAioCtx;
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86 | /** async I/O thread. */
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87 | RTTHREAD hThread;
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88 | /** List of files assigned to this manager. */
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89 | RTLISTANCHOR ListFiles;
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90 | /** Number of requests active currently. */
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91 | unsigned cReqsActive;
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92 | /** Number of maximum requests active. */
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93 | uint32_t cReqsActiveMax;
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94 | /** Memory cache for requests. */
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95 | RTMEMCACHE hMemCacheReqs;
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96 | /** Critical section protecting the blocking event handling. */
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97 | RTCRITSECT CritSectBlockingEvent;
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98 | /** Event semaphore for blocking external events.
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99 | * The caller waits on it until the async I/O manager
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100 | * finished processing the event. */
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101 | RTSEMEVENT hEventSemBlock;
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102 | /** Blocking event type */
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103 | volatile RTAIOMGREVENT enmBlockingEvent;
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104 | /** Event type data */
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105 | union
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106 | {
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107 | /** The file to be added */
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108 | volatile PRTAIOMGRFILEINT pFileAdd;
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109 | /** The file to be closed */
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110 | volatile PRTAIOMGRFILEINT pFileClose;
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111 | } BlockingEventData;
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112 | } RTAIOMGRINT;
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113 | /** Pointer to an internal async I/O manager instance. */
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114 | typedef RTAIOMGRINT *PRTAIOMGRINT;
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115 |
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116 | /**
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117 | * Async I/O manager file instance data.
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118 | */
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119 | typedef struct RTAIOMGRFILEINT
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120 | {
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121 | /** Magic value. */
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122 | uint32_t u32Magic;
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123 | /** Reference count. */
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124 | volatile uint32_t cRefs;
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125 | /** Flags. */
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126 | uint32_t fFlags;
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127 | /** Opaque user data passed on creation. */
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128 | void *pvUser;
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129 | /** File handle. */
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130 | RTFILE hFile;
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131 | /** async I/O manager this file belongs to. */
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132 | PRTAIOMGRINT pAioMgr;
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133 | /** Work queue for new requests. */
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134 | RTQUEUEATOMIC QueueReqs;
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135 | /** Completion callback for this file. */
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136 | PFNRTAIOMGRREQCOMPLETE pfnReqCompleted;
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137 | /** Data for exclusive use by the assigned async I/O manager. */
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138 | struct
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139 | {
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140 | /** List node of assigned files for a async I/O manager. */
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141 | RTLISTNODE NodeAioMgrFiles;
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142 | /** List of requests waiting for submission. */
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143 | RTLISTANCHOR ListWaitingReqs;
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144 | /** Number of requests currently being processed for this endpoint
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145 | * (excluded flush requests). */
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146 | unsigned cReqsActive;
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147 | } AioMgr;
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148 | } RTAIOMGRFILEINT;
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149 |
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150 | /** Flag whether the file is closed. */
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151 | #define RTAIOMGRFILE_FLAGS_CLOSING RT_BIT_32(1)
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152 |
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153 | /**
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154 | * Request type.
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155 | */
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156 | typedef enum RTAIOMGRREQTYPE
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157 | {
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158 | /** Invalid request type. */
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159 | RTAIOMGRREQTYPE_INVALID = 0,
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160 | /** Read reques type. */
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161 | RTAIOMGRREQTYPE_READ,
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162 | /** Write request. */
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163 | RTAIOMGRREQTYPE_WRITE,
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164 | /** Flush request. */
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165 | RTAIOMGRREQTYPE_FLUSH,
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166 | /** Prefetech request. */
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167 | RTAIOMGRREQTYPE_PREFETCH,
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168 | /** 32bit hack. */
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169 | RTAIOMGRREQTYPE_32BIT_HACK = 0x7fffffff
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170 | } RTAIOMGRREQTYPE;
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171 | /** Pointer to a reques type. */
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172 | typedef RTAIOMGRREQTYPE *PRTAIOMGRREQTYPE;
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173 |
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174 | /**
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175 | * Async I/O manager request.
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176 | */
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177 | typedef struct RTAIOMGRREQ
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178 | {
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179 | /** Atomic queue work item. */
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180 | RTQUEUEATOMICITEM WorkItem;
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181 | /** Node for a waiting list. */
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182 | RTLISTNODE NodeWaitingList;
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183 | /** Request flags. */
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184 | uint32_t fFlags;
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185 | /** Transfer type. */
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186 | RTAIOMGRREQTYPE enmType;
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187 | /** Assigned file request. */
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188 | RTFILEAIOREQ hReqIo;
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189 | /** File the request belongs to. */
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190 | PRTAIOMGRFILEINT pFile;
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191 | /** Opaque user data. */
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192 | void *pvUser;
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193 | /** Start offset */
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194 | RTFOFF off;
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195 | /** Data segment. */
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196 | RTSGSEG DataSeg;
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197 | /** When non-zero the segment uses a bounce buffer because the provided buffer
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198 | * doesn't meet host requirements. */
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199 | size_t cbBounceBuffer;
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200 | /** Pointer to the used bounce buffer if any. */
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201 | void *pvBounceBuffer;
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202 | /** Start offset in the bounce buffer to copy from. */
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203 | uint32_t offBounceBuffer;
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204 | } RTAIOMGRREQ;
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205 | /** Pointer to a I/O manager request. */
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206 | typedef RTAIOMGRREQ *PRTAIOMGRREQ;
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207 |
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208 | /** Flag whether the request was prepared already. */
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209 | #define RTAIOMGRREQ_FLAGS_PREPARED RT_BIT_32(0)
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210 |
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211 |
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212 | /*********************************************************************************************************************************
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213 | * Defined Constants And Macros *
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214 | *********************************************************************************************************************************/
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215 |
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216 | /** Validates a handle and returns VERR_INVALID_HANDLE if not valid. */
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217 | #define RTAIOMGR_VALID_RETURN_RC(a_hAioMgr, a_rc) \
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218 | do { \
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219 | AssertPtrReturn((a_hAioMgr), (a_rc)); \
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220 | AssertReturn((a_hAioMgr)->u32Magic == RTAIOMGR_MAGIC, (a_rc)); \
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221 | } while (0)
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222 |
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223 | /** Validates a handle and returns VERR_INVALID_HANDLE if not valid. */
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224 | #define RTAIOMGR_VALID_RETURN(a_hAioMgr) RTAIOMGR_VALID_RETURN_RC((hAioMgr), VERR_INVALID_HANDLE)
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225 |
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226 | /** Validates a handle and returns (void) if not valid. */
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227 | #define RTAIOMGR_VALID_RETURN_VOID(a_hAioMgr) \
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228 | do { \
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229 | AssertPtrReturnVoid(a_hAioMgr); \
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230 | AssertReturnVoid((a_hAioMgr)->u32Magic == RTAIOMGR_MAGIC); \
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231 | } while (0)
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232 |
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233 |
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234 | /*********************************************************************************************************************************
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235 | * Internal Functions *
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236 | *********************************************************************************************************************************/
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237 |
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238 | static int rtAioMgrReqsEnqueue(PRTAIOMGRINT pThis, PRTAIOMGRFILEINT pFile,
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239 | PRTFILEAIOREQ pahReqs, unsigned cReqs);
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240 |
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241 | /**
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242 | * Removes an endpoint from the currently assigned manager.
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243 | *
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244 | * @returns TRUE if there are still requests pending on the current manager for this endpoint.
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245 | * FALSE otherwise.
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246 | * @param pFile The endpoint to remove.
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247 | */
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248 | static bool rtAioMgrFileRemove(PRTAIOMGRFILEINT pFile)
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249 | {
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250 | /* Make sure that there is no request pending on this manager for the endpoint. */
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251 | if (!pFile->AioMgr.cReqsActive)
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252 | {
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253 | RTListNodeRemove(&pFile->AioMgr.NodeAioMgrFiles);
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254 | return false;
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255 | }
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256 |
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257 | return true;
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258 | }
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259 |
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260 | /**
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261 | * Allocate a new I/O request.
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262 | *
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263 | * @returns Pointer to the allocated request or NULL if out of memory.
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264 | * @param pThis The async I/O manager instance.
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265 | */
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266 | static PRTAIOMGRREQ rtAioMgrReqAlloc(PRTAIOMGRINT pThis)
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267 | {
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268 | return (PRTAIOMGRREQ)RTMemCacheAlloc(pThis->hMemCacheReqs);
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269 | }
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270 |
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271 | /**
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272 | * Frees an I/O request.
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273 | *
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274 | * @returns nothing.
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275 | * @param pThis The async I/O manager instance.
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276 | * @param pReq The request to free.
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277 | */
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278 | static void rtAioMgrReqFree(PRTAIOMGRINT pThis, PRTAIOMGRREQ pReq)
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279 | {
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280 | if (pReq->cbBounceBuffer)
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281 | {
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282 | AssertPtr(pReq->pvBounceBuffer);
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283 | RTMemPageFree(pReq->pvBounceBuffer, pReq->cbBounceBuffer);
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284 | pReq->pvBounceBuffer = NULL;
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285 | pReq->cbBounceBuffer = 0;
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286 | }
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287 | pReq->fFlags = 0;
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288 | RTAioMgrFileRelease(pReq->pFile);
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289 | RTMemCacheFree(pThis->hMemCacheReqs, pReq);
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290 | }
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291 |
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292 | static void rtAioMgrReqCompleteRc(PRTAIOMGRINT pThis, PRTAIOMGRREQ pReq,
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293 | int rcReq, size_t cbTransfered)
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294 | {
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295 | int rc = VINF_SUCCESS;
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296 | PRTAIOMGRFILEINT pFile;
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297 |
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298 | pFile = pReq->pFile;
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299 | pThis->cReqsActive--;
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300 | pFile->AioMgr.cReqsActive--;
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301 |
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302 | /*
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303 | * It is possible that the request failed on Linux with kernels < 2.6.23
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304 | * if the passed buffer was allocated with remap_pfn_range or if the file
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305 | * is on an NFS endpoint which does not support async and direct I/O at the same time.
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306 | * The endpoint will be migrated to a failsafe manager in case a request fails.
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307 | */
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308 | if (RT_FAILURE(rcReq))
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309 | {
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310 | pFile->pfnReqCompleted(pFile, rcReq, pReq->pvUser);
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311 | rtAioMgrReqFree(pThis, pReq);
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312 | }
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313 | else
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314 | {
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315 | /*
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316 | * Restart an incomplete transfer.
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317 | * This usually means that the request will return an error now
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318 | * but to get the cause of the error (disk full, file too big, I/O error, ...)
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319 | * the transfer needs to be continued.
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320 | */
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321 | if (RT_UNLIKELY( cbTransfered < pReq->DataSeg.cbSeg
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322 | || ( pReq->cbBounceBuffer
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323 | && cbTransfered < pReq->cbBounceBuffer)))
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324 | {
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325 | RTFOFF offStart;
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326 | size_t cbToTransfer;
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327 | uint8_t *pbBuf = NULL;
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328 |
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329 | Assert(cbTransfered % 512 == 0);
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330 |
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331 | if (pReq->cbBounceBuffer)
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332 | {
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333 | AssertPtr(pReq->pvBounceBuffer);
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334 | offStart = (pReq->off & ~((RTFOFF)512-1)) + cbTransfered;
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335 | cbToTransfer = pReq->cbBounceBuffer - cbTransfered;
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336 | pbBuf = (uint8_t *)pReq->pvBounceBuffer + cbTransfered;
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337 | }
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338 | else
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339 | {
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340 | Assert(!pReq->pvBounceBuffer);
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341 | offStart = pReq->off + cbTransfered;
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342 | cbToTransfer = pReq->DataSeg.cbSeg - cbTransfered;
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343 | pbBuf = (uint8_t *)pReq->DataSeg.pvSeg + cbTransfered;
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344 | }
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345 |
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346 | if ( pReq->enmType == RTAIOMGRREQTYPE_PREFETCH
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347 | || pReq->enmType == RTAIOMGRREQTYPE_READ)
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348 | {
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349 | rc = RTFileAioReqPrepareRead(pReq->hReqIo, pFile->hFile, offStart,
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350 | pbBuf, cbToTransfer, pReq);
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351 | }
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352 | else
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353 | {
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354 | AssertMsg(pReq->enmType == RTAIOMGRREQTYPE_WRITE,
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355 | ("Invalid transfer type\n"));
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356 | rc = RTFileAioReqPrepareWrite(pReq->hReqIo, pFile->hFile, offStart,
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357 | pbBuf, cbToTransfer, pReq);
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358 | }
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359 | AssertRC(rc);
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360 |
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361 | rc = rtAioMgrReqsEnqueue(pThis, pFile, &pReq->hReqIo, 1);
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362 | AssertMsg(RT_SUCCESS(rc) || (rc == VERR_FILE_AIO_INSUFFICIENT_RESSOURCES),
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363 | ("Unexpected return code rc=%Rrc\n", rc));
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364 | }
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365 | else if (pReq->enmType == RTAIOMGRREQTYPE_PREFETCH)
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366 | {
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367 | Assert(pReq->cbBounceBuffer);
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368 | pReq->enmType = RTAIOMGRREQTYPE_WRITE;
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369 |
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370 | memcpy(((uint8_t *)pReq->pvBounceBuffer) + pReq->offBounceBuffer,
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371 | pReq->DataSeg.pvSeg,
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372 | pReq->DataSeg.cbSeg);
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373 |
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374 | /* Write it now. */
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375 | RTFOFF offStart = pReq->off & ~(RTFOFF)(512-1);
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376 | size_t cbToTransfer = RT_ALIGN_Z(pReq->DataSeg.cbSeg + (pReq->off - offStart), 512);
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377 |
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378 | rc = RTFileAioReqPrepareWrite(pReq->hReqIo, pFile->hFile,
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379 | offStart, pReq->pvBounceBuffer, cbToTransfer, pReq);
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380 | AssertRC(rc);
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381 | rc = rtAioMgrReqsEnqueue(pThis, pFile, &pReq->hReqIo, 1);
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382 | AssertMsg(RT_SUCCESS(rc) || (rc == VERR_FILE_AIO_INSUFFICIENT_RESSOURCES),
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383 | ("Unexpected return code rc=%Rrc\n", rc));
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384 | }
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385 | else
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386 | {
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387 | if (RT_SUCCESS(rc) && pReq->cbBounceBuffer)
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388 | {
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389 | if (pReq->enmType == RTAIOMGRREQTYPE_READ)
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390 | memcpy(pReq->DataSeg.pvSeg,
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391 | ((uint8_t *)pReq->pvBounceBuffer) + pReq->offBounceBuffer,
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392 | pReq->DataSeg.cbSeg);
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393 | }
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394 |
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395 | /* Call completion callback */
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396 | pFile->pfnReqCompleted(pFile, rcReq, pReq->pvUser);
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397 | rtAioMgrReqFree(pThis, pReq);
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398 | }
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399 | } /* request completed successfully */
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400 | }
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401 |
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402 | /**
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403 | * Wrapper around rtAioMgrReqCompleteRc().
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404 | */
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405 | static void rtAioMgrReqComplete(PRTAIOMGRINT pThis, RTFILEAIOREQ hReq)
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406 | {
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407 | size_t cbTransfered = 0;
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408 | int rcReq = RTFileAioReqGetRC(hReq, &cbTransfered);
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409 | PRTAIOMGRREQ pReq = (PRTAIOMGRREQ)RTFileAioReqGetUser(hReq);
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410 |
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411 | rtAioMgrReqCompleteRc(pThis, pReq, rcReq, cbTransfered);
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412 | }
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413 |
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414 | /**
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415 | * Wrapper around RTFIleAioCtxSubmit() which is also doing error handling.
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416 | */
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417 | static int rtAioMgrReqsEnqueue(PRTAIOMGRINT pThis, PRTAIOMGRFILEINT pFile,
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418 | PRTFILEAIOREQ pahReqs, unsigned cReqs)
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419 | {
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420 | pThis->cReqsActive += cReqs;
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421 | pFile->AioMgr.cReqsActive += cReqs;
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422 |
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423 | int rc = RTFileAioCtxSubmit(pThis->hAioCtx, pahReqs, cReqs);
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424 | if (RT_FAILURE(rc))
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425 | {
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426 | if (rc == VERR_FILE_AIO_INSUFFICIENT_RESSOURCES)
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427 | {
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428 | /* Append any not submitted task to the waiting list. */
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429 | for (size_t i = 0; i < cReqs; i++)
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430 | {
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431 | int rcReq = RTFileAioReqGetRC(pahReqs[i], NULL);
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432 |
|
---|
433 | if (rcReq != VERR_FILE_AIO_IN_PROGRESS)
|
---|
434 | {
|
---|
435 | PRTAIOMGRREQ pReq = (PRTAIOMGRREQ)RTFileAioReqGetUser(pahReqs[i]);
|
---|
436 |
|
---|
437 | Assert(pReq->hReqIo == pahReqs[i]);
|
---|
438 | RTListAppend(&pFile->AioMgr.ListWaitingReqs, &pReq->NodeWaitingList);
|
---|
439 | pThis->cReqsActive--;
|
---|
440 | pFile->AioMgr.cReqsActive--;
|
---|
441 | }
|
---|
442 | }
|
---|
443 |
|
---|
444 | pThis->cReqsActiveMax = pThis->cReqsActive;
|
---|
445 | rc = VINF_SUCCESS;
|
---|
446 | }
|
---|
447 | else /* Another kind of error happened (full disk, ...) */
|
---|
448 | {
|
---|
449 | /* An error happened. Find out which one caused the error and resubmit all other tasks. */
|
---|
450 | for (size_t i = 0; i < cReqs; i++)
|
---|
451 | {
|
---|
452 | PRTAIOMGRREQ pReq = (PRTAIOMGRREQ)RTFileAioReqGetUser(pahReqs[i]);
|
---|
453 | int rcReq = RTFileAioReqGetRC(pahReqs[i], NULL);
|
---|
454 |
|
---|
455 | if (rcReq == VERR_FILE_AIO_NOT_SUBMITTED)
|
---|
456 | {
|
---|
457 | /* We call ourself again to do any error handling which might come up now. */
|
---|
458 | rc = rtAioMgrReqsEnqueue(pThis, pFile, &pahReqs[i], 1);
|
---|
459 | AssertRC(rc);
|
---|
460 | }
|
---|
461 | else if (rcReq != VERR_FILE_AIO_IN_PROGRESS)
|
---|
462 | rtAioMgrReqCompleteRc(pThis, pReq, rcReq, 0);
|
---|
463 | }
|
---|
464 | }
|
---|
465 | }
|
---|
466 |
|
---|
467 | return VINF_SUCCESS;
|
---|
468 | }
|
---|
469 |
|
---|
470 | /**
|
---|
471 | * Adds a list of requests to the waiting list.
|
---|
472 | *
|
---|
473 | * @returns nothing.
|
---|
474 | * @param pFile The file instance to add the requests to.
|
---|
475 | * @param pReqsHead The head of the request list to add.
|
---|
476 | */
|
---|
477 | static void rtAioMgrFileAddReqsToWaitingList(PRTAIOMGRFILEINT pFile, PRTAIOMGRREQ pReqsHead)
|
---|
478 | {
|
---|
479 | while (pReqsHead)
|
---|
480 | {
|
---|
481 | PRTAIOMGRREQ pReqCur = pReqsHead;
|
---|
482 |
|
---|
483 | pReqsHead = (PRTAIOMGRREQ)pReqsHead->WorkItem.pNext;
|
---|
484 | pReqCur->WorkItem.pNext = NULL;
|
---|
485 | RTListAppend(&pFile->AioMgr.ListWaitingReqs, &pReqCur->NodeWaitingList);
|
---|
486 | }
|
---|
487 | }
|
---|
488 |
|
---|
489 | /**
|
---|
490 | * Prepare the native I/o request ensuring that all alignment prerequisites of
|
---|
491 | * the host are met.
|
---|
492 | *
|
---|
493 | * @returns IPRT statuse code.
|
---|
494 | * @param pFile The file instance data.
|
---|
495 | * @param pReq The request to prepare.
|
---|
496 | */
|
---|
497 | static int rtAioMgrReqPrepareNonBuffered(PRTAIOMGRFILEINT pFile, PRTAIOMGRREQ pReq)
|
---|
498 | {
|
---|
499 | int rc = VINF_SUCCESS;
|
---|
500 | RTFOFF offStart = pReq->off & ~(RTFOFF)(512-1);
|
---|
501 | size_t cbToTransfer = RT_ALIGN_Z(pReq->DataSeg.cbSeg + (pReq->off - offStart), 512);
|
---|
502 | void *pvBuf = pReq->DataSeg.pvSeg;
|
---|
503 | bool fAlignedReq = cbToTransfer == pReq->DataSeg.cbSeg
|
---|
504 | && offStart == pReq->off;
|
---|
505 |
|
---|
506 | /*
|
---|
507 | * Check if the alignment requirements are met.
|
---|
508 | * Offset, transfer size and buffer address
|
---|
509 | * need to be on a 512 boundary.
|
---|
510 | */
|
---|
511 | if ( !fAlignedReq
|
---|
512 | /** @todo || ((pEpClassFile->uBitmaskAlignment & (RTR3UINTPTR)pvBuf) != (RTR3UINTPTR)pvBuf) */)
|
---|
513 | {
|
---|
514 | /* Create bounce buffer. */
|
---|
515 | pReq->cbBounceBuffer = cbToTransfer;
|
---|
516 |
|
---|
517 | AssertMsg(pReq->off >= offStart, ("Overflow in calculation off=%llu offStart=%llu\n",
|
---|
518 | pReq->off, offStart));
|
---|
519 | pReq->offBounceBuffer = pReq->off - offStart;
|
---|
520 |
|
---|
521 | /** @todo I think we need something like a RTMemAllocAligned method here.
|
---|
522 | * Current assumption is that the maximum alignment is 4096byte
|
---|
523 | * (GPT disk on Windows)
|
---|
524 | * so we can use RTMemPageAlloc here.
|
---|
525 | */
|
---|
526 | pReq->pvBounceBuffer = RTMemPageAlloc(cbToTransfer);
|
---|
527 | if (RT_LIKELY(pReq->pvBounceBuffer))
|
---|
528 | {
|
---|
529 | pvBuf = pReq->pvBounceBuffer;
|
---|
530 |
|
---|
531 | if (pReq->enmType == RTAIOMGRREQTYPE_WRITE)
|
---|
532 | {
|
---|
533 | if ( RT_UNLIKELY(cbToTransfer != pReq->DataSeg.cbSeg)
|
---|
534 | || RT_UNLIKELY(offStart != pReq->off))
|
---|
535 | {
|
---|
536 | /* We have to fill the buffer first before we can update the data. */
|
---|
537 | pReq->enmType = RTAIOMGRREQTYPE_WRITE;
|
---|
538 | }
|
---|
539 | else
|
---|
540 | memcpy(pvBuf, pReq->DataSeg.pvSeg, pReq->DataSeg.cbSeg);
|
---|
541 | }
|
---|
542 | }
|
---|
543 | else
|
---|
544 | rc = VERR_NO_MEMORY;
|
---|
545 | }
|
---|
546 | else
|
---|
547 | pReq->cbBounceBuffer = 0;
|
---|
548 |
|
---|
549 | if (RT_SUCCESS(rc))
|
---|
550 | {
|
---|
551 | if (pReq->enmType == RTAIOMGRREQTYPE_WRITE)
|
---|
552 | {
|
---|
553 | rc = RTFileAioReqPrepareWrite(pReq->hReqIo, pFile->hFile,
|
---|
554 | offStart, pvBuf, cbToTransfer, pReq);
|
---|
555 | }
|
---|
556 | else /* Read or prefetch request. */
|
---|
557 | rc = RTFileAioReqPrepareRead(pReq->hReqIo, pFile->hFile,
|
---|
558 | offStart, pvBuf, cbToTransfer, pReq);
|
---|
559 | AssertRC(rc);
|
---|
560 | pReq->fFlags |= RTAIOMGRREQ_FLAGS_PREPARED;
|
---|
561 | }
|
---|
562 |
|
---|
563 | return rc;
|
---|
564 | }
|
---|
565 |
|
---|
566 | /**
|
---|
567 | * Prepare a new request for enqueuing.
|
---|
568 | *
|
---|
569 | * @returns IPRT status code.
|
---|
570 | * @param pReq The request to prepare.
|
---|
571 | * @param phReqIo Where to store the handle to the native I/O request on success.
|
---|
572 | */
|
---|
573 | static int rtAioMgrPrepareReq(PRTAIOMGRREQ pReq, PRTFILEAIOREQ phReqIo)
|
---|
574 | {
|
---|
575 | int rc = VINF_SUCCESS;
|
---|
576 | PRTAIOMGRFILEINT pFile = pReq->pFile;
|
---|
577 |
|
---|
578 | switch (pReq->enmType)
|
---|
579 | {
|
---|
580 | case RTAIOMGRREQTYPE_FLUSH:
|
---|
581 | {
|
---|
582 | rc = RTFileAioReqPrepareFlush(pReq->hReqIo, pFile->hFile, pReq);
|
---|
583 | break;
|
---|
584 | }
|
---|
585 | case RTAIOMGRREQTYPE_READ:
|
---|
586 | case RTAIOMGRREQTYPE_WRITE:
|
---|
587 | {
|
---|
588 | rc = rtAioMgrReqPrepareNonBuffered(pFile, pReq);
|
---|
589 | break;
|
---|
590 | }
|
---|
591 | default:
|
---|
592 | AssertMsgFailed(("Invalid transfer type %d\n", pReq->enmType));
|
---|
593 | } /* switch transfer type */
|
---|
594 |
|
---|
595 | if (RT_SUCCESS(rc))
|
---|
596 | *phReqIo = pReq->hReqIo;
|
---|
597 |
|
---|
598 | return rc;
|
---|
599 | }
|
---|
600 |
|
---|
601 | /**
|
---|
602 | * Prepare newly submitted requests for processing.
|
---|
603 | *
|
---|
604 | * @returns IPRT status code
|
---|
605 | * @param pThis The async I/O manager instance data.
|
---|
606 | * @param pFile The file instance.
|
---|
607 | * @param pReqsNew The list of new requests to prepare.
|
---|
608 | */
|
---|
609 | static int rtAioMgrPrepareNewReqs(PRTAIOMGRINT pThis,
|
---|
610 | PRTAIOMGRFILEINT pFile,
|
---|
611 | PRTAIOMGRREQ pReqsNew)
|
---|
612 | {
|
---|
613 | RTFILEAIOREQ apReqs[20];
|
---|
614 | unsigned cRequests = 0;
|
---|
615 | int rc = VINF_SUCCESS;
|
---|
616 |
|
---|
617 | /* Go through the list and queue the requests. */
|
---|
618 | while ( pReqsNew
|
---|
619 | && (pThis->cReqsActive + cRequests < pThis->cReqsActiveMax)
|
---|
620 | && RT_SUCCESS(rc))
|
---|
621 | {
|
---|
622 | PRTAIOMGRREQ pCurr = pReqsNew;
|
---|
623 | pReqsNew = (PRTAIOMGRREQ)pReqsNew->WorkItem.pNext;
|
---|
624 |
|
---|
625 | pCurr->WorkItem.pNext = NULL;
|
---|
626 | AssertMsg(VALID_PTR(pCurr->pFile) && (pCurr->pFile == pFile),
|
---|
627 | ("Files do not match\n"));
|
---|
628 | AssertMsg(!(pCurr->fFlags & RTAIOMGRREQ_FLAGS_PREPARED),
|
---|
629 | ("Request on the new list is already prepared\n"));
|
---|
630 |
|
---|
631 | rc = rtAioMgrPrepareReq(pCurr, &apReqs[cRequests]);
|
---|
632 | if (RT_FAILURE(rc))
|
---|
633 | rtAioMgrReqCompleteRc(pThis, pCurr, rc, 0);
|
---|
634 | else
|
---|
635 | cRequests++;
|
---|
636 |
|
---|
637 | /* Queue the requests if the array is full. */
|
---|
638 | if (cRequests == RT_ELEMENTS(apReqs))
|
---|
639 | {
|
---|
640 | rc = rtAioMgrReqsEnqueue(pThis, pFile, apReqs, cRequests);
|
---|
641 | cRequests = 0;
|
---|
642 | AssertMsg(RT_SUCCESS(rc) || (rc == VERR_FILE_AIO_INSUFFICIENT_RESSOURCES),
|
---|
643 | ("Unexpected return code\n"));
|
---|
644 | }
|
---|
645 | }
|
---|
646 |
|
---|
647 | if (cRequests)
|
---|
648 | {
|
---|
649 | rc = rtAioMgrReqsEnqueue(pThis, pFile, apReqs, cRequests);
|
---|
650 | AssertMsg(RT_SUCCESS(rc) || (rc == VERR_FILE_AIO_INSUFFICIENT_RESSOURCES),
|
---|
651 | ("Unexpected return code rc=%Rrc\n", rc));
|
---|
652 | }
|
---|
653 |
|
---|
654 | if (pReqsNew)
|
---|
655 | {
|
---|
656 | /* Add the rest of the tasks to the pending list */
|
---|
657 | rtAioMgrFileAddReqsToWaitingList(pFile, pReqsNew);
|
---|
658 | }
|
---|
659 |
|
---|
660 | /* Insufficient resources are not fatal. */
|
---|
661 | if (rc == VERR_FILE_AIO_INSUFFICIENT_RESSOURCES)
|
---|
662 | rc = VINF_SUCCESS;
|
---|
663 |
|
---|
664 | return rc;
|
---|
665 | }
|
---|
666 |
|
---|
667 | /**
|
---|
668 | * Queues waiting requests.
|
---|
669 | *
|
---|
670 | * @returns IPRT status code.
|
---|
671 | * @param pThis The async I/O manager instance data.
|
---|
672 | * @param pFile The file to get the requests from.
|
---|
673 | */
|
---|
674 | static int rtAioMgrQueueWaitingReqs(PRTAIOMGRINT pThis, PRTAIOMGRFILEINT pFile)
|
---|
675 | {
|
---|
676 | RTFILEAIOREQ apReqs[20];
|
---|
677 | unsigned cRequests = 0;
|
---|
678 | int rc = VINF_SUCCESS;
|
---|
679 |
|
---|
680 | /* Go through the list and queue the requests. */
|
---|
681 | PRTAIOMGRREQ pReqIt;
|
---|
682 | PRTAIOMGRREQ pReqItNext;
|
---|
683 | RTListForEachSafe(&pFile->AioMgr.ListWaitingReqs, pReqIt, pReqItNext, RTAIOMGRREQ, NodeWaitingList)
|
---|
684 | {
|
---|
685 | RTListNodeRemove(&pReqIt->NodeWaitingList);
|
---|
686 | AssertMsg(VALID_PTR(pReqIt->pFile) && (pReqIt->pFile == pFile),
|
---|
687 | ("Files do not match\n"));
|
---|
688 |
|
---|
689 | if (!(pReqIt->fFlags & RTAIOMGRREQ_FLAGS_PREPARED))
|
---|
690 | {
|
---|
691 | rc = rtAioMgrPrepareReq(pReqIt, &apReqs[cRequests]);
|
---|
692 | if (RT_FAILURE(rc))
|
---|
693 | rtAioMgrReqCompleteRc(pThis, pReqIt, rc, 0);
|
---|
694 | else
|
---|
695 | cRequests++;
|
---|
696 | }
|
---|
697 | else
|
---|
698 | {
|
---|
699 | apReqs[cRequests] = pReqIt->hReqIo;
|
---|
700 | cRequests++;
|
---|
701 | }
|
---|
702 |
|
---|
703 | /* Queue the requests if the array is full. */
|
---|
704 | if (cRequests == RT_ELEMENTS(apReqs))
|
---|
705 | {
|
---|
706 | rc = rtAioMgrReqsEnqueue(pThis, pFile, apReqs, cRequests);
|
---|
707 | cRequests = 0;
|
---|
708 | AssertMsg(RT_SUCCESS(rc) || (rc == VERR_FILE_AIO_INSUFFICIENT_RESSOURCES),
|
---|
709 | ("Unexpected return code\n"));
|
---|
710 | }
|
---|
711 | }
|
---|
712 |
|
---|
713 | if (cRequests)
|
---|
714 | {
|
---|
715 | rc = rtAioMgrReqsEnqueue(pThis, pFile, apReqs, cRequests);
|
---|
716 | AssertMsg(RT_SUCCESS(rc) || (rc == VERR_FILE_AIO_INSUFFICIENT_RESSOURCES),
|
---|
717 | ("Unexpected return code rc=%Rrc\n", rc));
|
---|
718 | }
|
---|
719 |
|
---|
720 | /* Insufficient resources are not fatal. */
|
---|
721 | if (rc == VERR_FILE_AIO_INSUFFICIENT_RESSOURCES)
|
---|
722 | rc = VINF_SUCCESS;
|
---|
723 |
|
---|
724 | return rc;
|
---|
725 | }
|
---|
726 |
|
---|
727 | /**
|
---|
728 | * Adds all pending requests for the given file.
|
---|
729 | *
|
---|
730 | * @returns IPRT status code.
|
---|
731 | * @param pThis The async I/O manager instance data.
|
---|
732 | * @param pFile The file to get the requests from.
|
---|
733 | */
|
---|
734 | static int rtAioMgrQueueReqs(PRTAIOMGRINT pThis, PRTAIOMGRFILEINT pFile)
|
---|
735 | {
|
---|
736 | int rc = VINF_SUCCESS;
|
---|
737 |
|
---|
738 | /* Check the pending list first */
|
---|
739 | if (!RTListIsEmpty(&pFile->AioMgr.ListWaitingReqs))
|
---|
740 | rc = rtAioMgrQueueWaitingReqs(pThis, pFile);
|
---|
741 |
|
---|
742 | if ( RT_SUCCESS(rc)
|
---|
743 | && RTListIsEmpty(&pFile->AioMgr.ListWaitingReqs))
|
---|
744 | {
|
---|
745 | PRTAIOMGRREQ pReqsNew = (PRTAIOMGRREQ)RTQueueAtomicRemoveAll(&pFile->QueueReqs);
|
---|
746 |
|
---|
747 | if (pReqsNew)
|
---|
748 | {
|
---|
749 | rc = rtAioMgrPrepareNewReqs(pThis, pFile, pReqsNew);
|
---|
750 | AssertRC(rc);
|
---|
751 | }
|
---|
752 | }
|
---|
753 |
|
---|
754 | return rc;
|
---|
755 | }
|
---|
756 |
|
---|
757 | /**
|
---|
758 | * Checks all files for new requests.
|
---|
759 | *
|
---|
760 | * @returns IPRT status code.
|
---|
761 | * @param pThis The I/O manager instance data.
|
---|
762 | */
|
---|
763 | static int rtAioMgrCheckFiles(PRTAIOMGRINT pThis)
|
---|
764 | {
|
---|
765 | int rc = VINF_SUCCESS;
|
---|
766 |
|
---|
767 | PRTAIOMGRFILEINT pIt;
|
---|
768 | RTListForEach(&pThis->ListFiles, pIt, RTAIOMGRFILEINT, AioMgr.NodeAioMgrFiles)
|
---|
769 | {
|
---|
770 | rc = rtAioMgrQueueReqs(pThis, pIt);
|
---|
771 | if (RT_FAILURE(rc))
|
---|
772 | return rc;
|
---|
773 | }
|
---|
774 |
|
---|
775 | return rc;
|
---|
776 | }
|
---|
777 |
|
---|
778 | /**
|
---|
779 | * Process a blocking event from the outside.
|
---|
780 | *
|
---|
781 | * @returns IPRT status code.
|
---|
782 | * @param pThis The async I/O manager instance data.
|
---|
783 | */
|
---|
784 | static int rtAioMgrProcessBlockingEvent(PRTAIOMGRINT pThis)
|
---|
785 | {
|
---|
786 | int rc = VINF_SUCCESS;
|
---|
787 | bool fNotifyWaiter = false;
|
---|
788 |
|
---|
789 | switch (pThis->enmBlockingEvent)
|
---|
790 | {
|
---|
791 | case RTAIOMGREVENT_NO_EVENT:
|
---|
792 | /* Nothing to do. */
|
---|
793 | break;
|
---|
794 | case RTAIOMGREVENT_FILE_ADD:
|
---|
795 | {
|
---|
796 | PRTAIOMGRFILEINT pFile = ASMAtomicReadPtrT(&pThis->BlockingEventData.pFileAdd, PRTAIOMGRFILEINT);
|
---|
797 | AssertMsg(VALID_PTR(pFile), ("Adding file event without a file to add\n"));
|
---|
798 |
|
---|
799 | RTListAppend(&pThis->ListFiles, &pFile->AioMgr.NodeAioMgrFiles);
|
---|
800 | fNotifyWaiter = true;
|
---|
801 | break;
|
---|
802 | }
|
---|
803 | case RTAIOMGREVENT_FILE_CLOSE:
|
---|
804 | {
|
---|
805 | PRTAIOMGRFILEINT pFile = ASMAtomicReadPtrT(&pThis->BlockingEventData.pFileClose, PRTAIOMGRFILEINT);
|
---|
806 | AssertMsg(VALID_PTR(pFile), ("Close file event without a file to close\n"));
|
---|
807 |
|
---|
808 | if (!(pFile->fFlags & RTAIOMGRFILE_FLAGS_CLOSING))
|
---|
809 | {
|
---|
810 | /* Make sure all requests finished. Process the queues a last time first. */
|
---|
811 | rc = rtAioMgrQueueReqs(pThis, pFile);
|
---|
812 | AssertRC(rc);
|
---|
813 |
|
---|
814 | pFile->fFlags |= RTAIOMGRFILE_FLAGS_CLOSING;
|
---|
815 | fNotifyWaiter = !rtAioMgrFileRemove(pFile);
|
---|
816 | }
|
---|
817 | else if (!pFile->AioMgr.cReqsActive)
|
---|
818 | fNotifyWaiter = true;
|
---|
819 | break;
|
---|
820 | }
|
---|
821 | case RTAIOMGREVENT_SHUTDOWN:
|
---|
822 | {
|
---|
823 | if (!pThis->cReqsActive)
|
---|
824 | fNotifyWaiter = true;
|
---|
825 | break;
|
---|
826 | }
|
---|
827 | default:
|
---|
828 | AssertReleaseMsgFailed(("Invalid event type %d\n", pThis->enmBlockingEvent));
|
---|
829 | }
|
---|
830 |
|
---|
831 | if (fNotifyWaiter)
|
---|
832 | {
|
---|
833 | /* Release the waiting thread. */
|
---|
834 | rc = RTSemEventSignal(pThis->hEventSemBlock);
|
---|
835 | AssertRC(rc);
|
---|
836 | }
|
---|
837 |
|
---|
838 | return rc;
|
---|
839 | }
|
---|
840 |
|
---|
841 | /**
|
---|
842 | * async I/O manager worker loop.
|
---|
843 | *
|
---|
844 | * @returns IPRT status code.
|
---|
845 | * @param hThreadSelf The thread handle this worker belongs to.
|
---|
846 | * @param pvUser Opaque user data (Pointer to async I/O manager instance).
|
---|
847 | */
|
---|
848 | static DECLCALLBACK(int) rtAioMgrWorker(RTTHREAD hThreadSelf, void *pvUser)
|
---|
849 | {
|
---|
850 | PRTAIOMGRINT pThis = (PRTAIOMGRINT)pvUser;
|
---|
851 | /*bool fRunning = true;*/
|
---|
852 | int rc = VINF_SUCCESS;
|
---|
853 |
|
---|
854 | do
|
---|
855 | {
|
---|
856 | uint32_t cReqsCompleted = 0;
|
---|
857 | RTFILEAIOREQ ahReqsCompleted[32];
|
---|
858 | rc = RTFileAioCtxWait(pThis->hAioCtx, 1, RT_INDEFINITE_WAIT, &ahReqsCompleted[0],
|
---|
859 | RT_ELEMENTS(ahReqsCompleted), &cReqsCompleted);
|
---|
860 | if (rc == VERR_INTERRUPTED)
|
---|
861 | {
|
---|
862 | /* Process external event. */
|
---|
863 | rtAioMgrProcessBlockingEvent(pThis);
|
---|
864 | rc = rtAioMgrCheckFiles(pThis);
|
---|
865 | }
|
---|
866 | else if (RT_FAILURE(rc))
|
---|
867 | {
|
---|
868 | /* Something bad happened. */
|
---|
869 | /** @todo */
|
---|
870 | }
|
---|
871 | else
|
---|
872 | {
|
---|
873 | /* Requests completed. */
|
---|
874 | for (uint32_t i = 0; i < cReqsCompleted; i++)
|
---|
875 | rtAioMgrReqComplete(pThis, ahReqsCompleted[i]);
|
---|
876 |
|
---|
877 | /* Check files for new requests and queue waiting requests. */
|
---|
878 | rc = rtAioMgrCheckFiles(pThis);
|
---|
879 | }
|
---|
880 | } while ( /*fRunning - never modified
|
---|
881 | && */ RT_SUCCESS(rc));
|
---|
882 |
|
---|
883 | RT_NOREF_PV(hThreadSelf);
|
---|
884 | return rc;
|
---|
885 | }
|
---|
886 |
|
---|
887 | /**
|
---|
888 | * Wakes up the async I/O manager.
|
---|
889 | *
|
---|
890 | * @returns IPRT status code.
|
---|
891 | * @param pThis The async I/O manager.
|
---|
892 | */
|
---|
893 | static int rtAioMgrWakeup(PRTAIOMGRINT pThis)
|
---|
894 | {
|
---|
895 | return RTFileAioCtxWakeup(pThis->hAioCtx);
|
---|
896 | }
|
---|
897 |
|
---|
898 | /**
|
---|
899 | * Waits until the async I/O manager handled the given event.
|
---|
900 | *
|
---|
901 | * @returns IPRT status code.
|
---|
902 | * @param pThis The async I/O manager.
|
---|
903 | * @param enmEvent The event to pass to the manager.
|
---|
904 | */
|
---|
905 | static int rtAioMgrWaitForBlockingEvent(PRTAIOMGRINT pThis, RTAIOMGREVENT enmEvent)
|
---|
906 | {
|
---|
907 | Assert(pThis->enmBlockingEvent == RTAIOMGREVENT_NO_EVENT);
|
---|
908 | ASMAtomicWriteU32((volatile uint32_t *)&pThis->enmBlockingEvent, enmEvent);
|
---|
909 |
|
---|
910 | /* Wakeup the async I/O manager */
|
---|
911 | int rc = rtAioMgrWakeup(pThis);
|
---|
912 | if (RT_FAILURE(rc))
|
---|
913 | return rc;
|
---|
914 |
|
---|
915 | /* Wait for completion. */
|
---|
916 | rc = RTSemEventWait(pThis->hEventSemBlock, RT_INDEFINITE_WAIT);
|
---|
917 | AssertRC(rc);
|
---|
918 |
|
---|
919 | ASMAtomicWriteU32((volatile uint32_t *)&pThis->enmBlockingEvent, RTAIOMGREVENT_NO_EVENT);
|
---|
920 |
|
---|
921 | return rc;
|
---|
922 | }
|
---|
923 |
|
---|
924 | /**
|
---|
925 | * Add a given file to the given I/O manager.
|
---|
926 | *
|
---|
927 | * @returns IPRT status code.
|
---|
928 | * @param pThis The async I/O manager.
|
---|
929 | * @param pFile The file to add.
|
---|
930 | */
|
---|
931 | static int rtAioMgrAddFile(PRTAIOMGRINT pThis, PRTAIOMGRFILEINT pFile)
|
---|
932 | {
|
---|
933 | /* Update the assigned I/O manager. */
|
---|
934 | ASMAtomicWritePtr(&pFile->pAioMgr, pThis);
|
---|
935 |
|
---|
936 | int rc = RTCritSectEnter(&pThis->CritSectBlockingEvent);
|
---|
937 | AssertRCReturn(rc, rc);
|
---|
938 |
|
---|
939 | ASMAtomicWritePtr(&pThis->BlockingEventData.pFileAdd, pFile);
|
---|
940 | rc = rtAioMgrWaitForBlockingEvent(pThis, RTAIOMGREVENT_FILE_ADD);
|
---|
941 | ASMAtomicWriteNullPtr(&pThis->BlockingEventData.pFileAdd);
|
---|
942 |
|
---|
943 | RTCritSectLeave(&pThis->CritSectBlockingEvent);
|
---|
944 | return rc;
|
---|
945 | }
|
---|
946 |
|
---|
947 | /**
|
---|
948 | * Removes a given file from the given I/O manager.
|
---|
949 | *
|
---|
950 | * @returns IPRT status code.
|
---|
951 | * @param pThis The async I/O manager.
|
---|
952 | * @param pFile The file to remove.
|
---|
953 | */
|
---|
954 | static int rtAioMgrCloseFile(PRTAIOMGRINT pThis, PRTAIOMGRFILEINT pFile)
|
---|
955 | {
|
---|
956 | int rc = RTCritSectEnter(&pThis->CritSectBlockingEvent);
|
---|
957 | AssertRCReturn(rc, rc);
|
---|
958 |
|
---|
959 | ASMAtomicWritePtr(&pThis->BlockingEventData.pFileClose, pFile);
|
---|
960 | rc = rtAioMgrWaitForBlockingEvent(pThis, RTAIOMGREVENT_FILE_CLOSE);
|
---|
961 | ASMAtomicWriteNullPtr(&pThis->BlockingEventData.pFileClose);
|
---|
962 |
|
---|
963 | RTCritSectLeave(&pThis->CritSectBlockingEvent);
|
---|
964 |
|
---|
965 | return rc;
|
---|
966 | }
|
---|
967 |
|
---|
968 | /**
|
---|
969 | * Process a shutdown event.
|
---|
970 | *
|
---|
971 | * @returns IPRT status code.
|
---|
972 | * @param pThis The async I/O manager to shut down.
|
---|
973 | */
|
---|
974 | static int rtAioMgrShutdown(PRTAIOMGRINT pThis)
|
---|
975 | {
|
---|
976 | int rc = RTCritSectEnter(&pThis->CritSectBlockingEvent);
|
---|
977 | AssertRCReturn(rc, rc);
|
---|
978 |
|
---|
979 | rc = rtAioMgrWaitForBlockingEvent(pThis, RTAIOMGREVENT_SHUTDOWN);
|
---|
980 | RTCritSectLeave(&pThis->CritSectBlockingEvent);
|
---|
981 |
|
---|
982 | return rc;
|
---|
983 | }
|
---|
984 |
|
---|
985 | /**
|
---|
986 | * Destroys an async I/O manager.
|
---|
987 | *
|
---|
988 | * @returns nothing.
|
---|
989 | * @param pThis The async I/O manager instance to destroy.
|
---|
990 | */
|
---|
991 | static void rtAioMgrDestroy(PRTAIOMGRINT pThis)
|
---|
992 | {
|
---|
993 | int rc;
|
---|
994 |
|
---|
995 | rc = rtAioMgrShutdown(pThis);
|
---|
996 | AssertRC(rc);
|
---|
997 |
|
---|
998 | rc = RTThreadWait(pThis->hThread, RT_INDEFINITE_WAIT, NULL);
|
---|
999 | AssertRC(rc);
|
---|
1000 |
|
---|
1001 | rc = RTFileAioCtxDestroy(pThis->hAioCtx);
|
---|
1002 | AssertRC(rc);
|
---|
1003 |
|
---|
1004 | rc = RTMemCacheDestroy(pThis->hMemCacheReqs);
|
---|
1005 | AssertRC(rc);
|
---|
1006 |
|
---|
1007 | pThis->hThread = NIL_RTTHREAD;
|
---|
1008 | pThis->hAioCtx = NIL_RTFILEAIOCTX;
|
---|
1009 | pThis->hMemCacheReqs = NIL_RTMEMCACHE;
|
---|
1010 | pThis->u32Magic = ~RTAIOMGR_MAGIC;
|
---|
1011 | RTCritSectDelete(&pThis->CritSectBlockingEvent);
|
---|
1012 | RTSemEventDestroy(pThis->hEventSemBlock);
|
---|
1013 | RTMemFree(pThis);
|
---|
1014 | }
|
---|
1015 |
|
---|
1016 | /**
|
---|
1017 | * Queues a new request for processing.
|
---|
1018 | */
|
---|
1019 | static void rtAioMgrFileQueueReq(PRTAIOMGRFILEINT pThis, PRTAIOMGRREQ pReq)
|
---|
1020 | {
|
---|
1021 | RTAioMgrFileRetain(pThis);
|
---|
1022 | RTQueueAtomicInsert(&pThis->QueueReqs, &pReq->WorkItem);
|
---|
1023 | rtAioMgrWakeup(pThis->pAioMgr);
|
---|
1024 | }
|
---|
1025 |
|
---|
1026 | /**
|
---|
1027 | * Destroys an async I/O manager file.
|
---|
1028 | *
|
---|
1029 | * @returns nothing.
|
---|
1030 | * @param pThis The async I/O manager file.
|
---|
1031 | */
|
---|
1032 | static void rtAioMgrFileDestroy(PRTAIOMGRFILEINT pThis)
|
---|
1033 | {
|
---|
1034 | pThis->u32Magic = ~RTAIOMGRFILE_MAGIC;
|
---|
1035 | rtAioMgrCloseFile(pThis->pAioMgr, pThis);
|
---|
1036 | RTAioMgrRelease(pThis->pAioMgr);
|
---|
1037 | RTMemFree(pThis);
|
---|
1038 | }
|
---|
1039 |
|
---|
1040 | /**
|
---|
1041 | * Queues a new I/O request.
|
---|
1042 | *
|
---|
1043 | * @returns IPRT status code.
|
---|
1044 | * @param hAioMgrFile The I/O manager file handle.
|
---|
1045 | * @param off Start offset of the I/o request.
|
---|
1046 | * @param pSgBuf Data S/G buffer.
|
---|
1047 | * @param cbIo How much to transfer.
|
---|
1048 | * @param pvUser Opaque user data.
|
---|
1049 | * @param enmType I/O direction type (read/write).
|
---|
1050 | */
|
---|
1051 | static int rtAioMgrFileIoReqCreate(RTAIOMGRFILE hAioMgrFile, RTFOFF off, PRTSGBUF pSgBuf,
|
---|
1052 | size_t cbIo, void *pvUser, RTAIOMGRREQTYPE enmType)
|
---|
1053 | {
|
---|
1054 | int rc;
|
---|
1055 | PRTAIOMGRFILEINT pFile = hAioMgrFile;
|
---|
1056 | PRTAIOMGRINT pAioMgr;
|
---|
1057 |
|
---|
1058 | AssertPtrReturn(pFile, VERR_INVALID_HANDLE);
|
---|
1059 | pAioMgr = pFile->pAioMgr;
|
---|
1060 |
|
---|
1061 | PRTAIOMGRREQ pReq = rtAioMgrReqAlloc(pAioMgr);
|
---|
1062 | if (RT_LIKELY(pReq))
|
---|
1063 | {
|
---|
1064 | unsigned cSeg = 1;
|
---|
1065 | size_t cbSeg = RTSgBufSegArrayCreate(pSgBuf, &pReq->DataSeg, &cSeg, cbIo);
|
---|
1066 |
|
---|
1067 | if (cbSeg == cbIo)
|
---|
1068 | {
|
---|
1069 | pReq->enmType = enmType;
|
---|
1070 | pReq->pFile = pFile;
|
---|
1071 | pReq->pvUser = pvUser;
|
---|
1072 | pReq->off = off;
|
---|
1073 | rtAioMgrFileQueueReq(pFile, pReq);
|
---|
1074 | rc = VERR_FILE_AIO_IN_PROGRESS;
|
---|
1075 | }
|
---|
1076 | else
|
---|
1077 | {
|
---|
1078 | /** @todo Real S/G buffer support. */
|
---|
1079 | rtAioMgrReqFree(pAioMgr, pReq);
|
---|
1080 | rc = VERR_NOT_SUPPORTED;
|
---|
1081 | }
|
---|
1082 | }
|
---|
1083 | else
|
---|
1084 | rc = VERR_NO_MEMORY;
|
---|
1085 |
|
---|
1086 | return rc;
|
---|
1087 | }
|
---|
1088 |
|
---|
1089 | /**
|
---|
1090 | * Request constructor for the memory cache.
|
---|
1091 | *
|
---|
1092 | * @returns IPRT status code.
|
---|
1093 | * @param hMemCache The cache handle.
|
---|
1094 | * @param pvObj The memory object that should be initialized.
|
---|
1095 | * @param pvUser The user argument.
|
---|
1096 | */
|
---|
1097 | static DECLCALLBACK(int) rtAioMgrReqCtor(RTMEMCACHE hMemCache, void *pvObj, void *pvUser)
|
---|
1098 | {
|
---|
1099 | PRTAIOMGRREQ pReq = (PRTAIOMGRREQ)pvObj;
|
---|
1100 | RT_NOREF_PV(hMemCache); RT_NOREF_PV(pvUser);
|
---|
1101 |
|
---|
1102 | memset(pReq, 0, sizeof(RTAIOMGRREQ));
|
---|
1103 | return RTFileAioReqCreate(&pReq->hReqIo);
|
---|
1104 | }
|
---|
1105 |
|
---|
1106 | /**
|
---|
1107 | * Request destructor for the memory cache.
|
---|
1108 | *
|
---|
1109 | * @param hMemCache The cache handle.
|
---|
1110 | * @param pvObj The memory object that should be destroyed.
|
---|
1111 | * @param pvUser The user argument.
|
---|
1112 | */
|
---|
1113 | static DECLCALLBACK(void) rtAioMgrReqDtor(RTMEMCACHE hMemCache, void *pvObj, void *pvUser)
|
---|
1114 | {
|
---|
1115 | PRTAIOMGRREQ pReq = (PRTAIOMGRREQ)pvObj;
|
---|
1116 | int rc = RTFileAioReqDestroy(pReq->hReqIo);
|
---|
1117 | AssertRC(rc);
|
---|
1118 |
|
---|
1119 | RT_NOREF_PV(hMemCache); RT_NOREF_PV(pvUser);
|
---|
1120 | }
|
---|
1121 |
|
---|
1122 | RTDECL(int) RTAioMgrCreate(PRTAIOMGR phAioMgr, uint32_t cReqsMax)
|
---|
1123 | {
|
---|
1124 | int rc = VINF_SUCCESS;
|
---|
1125 | PRTAIOMGRINT pThis;
|
---|
1126 |
|
---|
1127 | AssertPtrReturn(phAioMgr, VERR_INVALID_POINTER);
|
---|
1128 | AssertReturn(cReqsMax > 0, VERR_INVALID_PARAMETER);
|
---|
1129 |
|
---|
1130 | pThis = (PRTAIOMGRINT)RTMemAllocZ(sizeof(RTAIOMGRINT));
|
---|
1131 | if (pThis)
|
---|
1132 | {
|
---|
1133 | pThis->u32Magic = RTAIOMGR_MAGIC;
|
---|
1134 | pThis->cRefs = 1;
|
---|
1135 | pThis->enmBlockingEvent = RTAIOMGREVENT_NO_EVENT;
|
---|
1136 | RTListInit(&pThis->ListFiles);
|
---|
1137 | rc = RTCritSectInit(&pThis->CritSectBlockingEvent);
|
---|
1138 | if (RT_SUCCESS(rc))
|
---|
1139 | {
|
---|
1140 | rc = RTSemEventCreate(&pThis->hEventSemBlock);
|
---|
1141 | if (RT_SUCCESS(rc))
|
---|
1142 | {
|
---|
1143 | rc = RTMemCacheCreate(&pThis->hMemCacheReqs, sizeof(RTAIOMGRREQ),
|
---|
1144 | 0, UINT32_MAX, rtAioMgrReqCtor, rtAioMgrReqDtor, NULL, 0);
|
---|
1145 | if (RT_SUCCESS(rc))
|
---|
1146 | {
|
---|
1147 | rc = RTFileAioCtxCreate(&pThis->hAioCtx, cReqsMax == UINT32_MAX
|
---|
1148 | ? RTFILEAIO_UNLIMITED_REQS
|
---|
1149 | : cReqsMax,
|
---|
1150 | RTFILEAIOCTX_FLAGS_WAIT_WITHOUT_PENDING_REQUESTS);
|
---|
1151 | if (RT_SUCCESS(rc))
|
---|
1152 | {
|
---|
1153 | rc = RTThreadCreateF(&pThis->hThread, rtAioMgrWorker, pThis, 0, RTTHREADTYPE_IO,
|
---|
1154 | RTTHREADFLAGS_WAITABLE, "AioMgr-%u", cReqsMax);
|
---|
1155 | if (RT_FAILURE(rc))
|
---|
1156 | {
|
---|
1157 | rc = RTFileAioCtxDestroy(pThis->hAioCtx);
|
---|
1158 | AssertRC(rc);
|
---|
1159 | }
|
---|
1160 | }
|
---|
1161 |
|
---|
1162 | if (RT_FAILURE(rc))
|
---|
1163 | RTMemCacheDestroy(pThis->hMemCacheReqs);
|
---|
1164 | }
|
---|
1165 |
|
---|
1166 | if (RT_FAILURE(rc))
|
---|
1167 | RTSemEventDestroy(pThis->hEventSemBlock);
|
---|
1168 | }
|
---|
1169 |
|
---|
1170 | if (RT_FAILURE(rc))
|
---|
1171 | RTCritSectDelete(&pThis->CritSectBlockingEvent);
|
---|
1172 | }
|
---|
1173 |
|
---|
1174 | if (RT_FAILURE(rc))
|
---|
1175 | RTMemFree(pThis);
|
---|
1176 | }
|
---|
1177 | else
|
---|
1178 | rc = VERR_NO_MEMORY;
|
---|
1179 |
|
---|
1180 | if (RT_SUCCESS(rc))
|
---|
1181 | *phAioMgr = pThis;
|
---|
1182 |
|
---|
1183 | return rc;
|
---|
1184 | }
|
---|
1185 |
|
---|
1186 | RTDECL(uint32_t) RTAioMgrRetain(RTAIOMGR hAioMgr)
|
---|
1187 | {
|
---|
1188 | PRTAIOMGRINT pThis = hAioMgr;
|
---|
1189 | AssertReturn(hAioMgr != NIL_RTAIOMGR, UINT32_MAX);
|
---|
1190 | AssertPtrReturn(pThis, UINT32_MAX);
|
---|
1191 | AssertReturn(pThis->u32Magic == RTAIOMGR_MAGIC, UINT32_MAX);
|
---|
1192 |
|
---|
1193 | uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
|
---|
1194 | AssertMsg(cRefs > 1 && cRefs < _1G, ("%#x %p\n", cRefs, pThis));
|
---|
1195 | return cRefs;
|
---|
1196 | }
|
---|
1197 |
|
---|
1198 | RTDECL(uint32_t) RTAioMgrRelease(RTAIOMGR hAioMgr)
|
---|
1199 | {
|
---|
1200 | PRTAIOMGRINT pThis = hAioMgr;
|
---|
1201 | if (pThis == NIL_RTAIOMGR)
|
---|
1202 | return 0;
|
---|
1203 | AssertPtrReturn(pThis, UINT32_MAX);
|
---|
1204 | AssertReturn(pThis->u32Magic == RTAIOMGR_MAGIC, UINT32_MAX);
|
---|
1205 |
|
---|
1206 | uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
|
---|
1207 | AssertMsg(cRefs < _1G, ("%#x %p\n", cRefs, pThis));
|
---|
1208 | if (cRefs == 0)
|
---|
1209 | rtAioMgrDestroy(pThis);
|
---|
1210 | return cRefs;
|
---|
1211 | }
|
---|
1212 |
|
---|
1213 | RTDECL(int) RTAioMgrFileCreate(RTAIOMGR hAioMgr, RTFILE hFile, PFNRTAIOMGRREQCOMPLETE pfnReqComplete,
|
---|
1214 | void *pvUser, PRTAIOMGRFILE phAioMgrFile)
|
---|
1215 | {
|
---|
1216 | int rc = VINF_SUCCESS;
|
---|
1217 | PRTAIOMGRFILEINT pThis;
|
---|
1218 |
|
---|
1219 | AssertReturn(hAioMgr != NIL_RTAIOMGR, VERR_INVALID_HANDLE);
|
---|
1220 | AssertReturn(hFile != NIL_RTFILE, VERR_INVALID_HANDLE);
|
---|
1221 | AssertPtrReturn(pfnReqComplete, VERR_INVALID_POINTER);
|
---|
1222 | AssertPtrReturn(phAioMgrFile, VERR_INVALID_POINTER);
|
---|
1223 |
|
---|
1224 | pThis = (PRTAIOMGRFILEINT)RTMemAllocZ(sizeof(RTAIOMGRFILEINT));
|
---|
1225 | if (pThis)
|
---|
1226 | {
|
---|
1227 | pThis->u32Magic = RTAIOMGRFILE_MAGIC;
|
---|
1228 | pThis->cRefs = 1;
|
---|
1229 | pThis->hFile = hFile;
|
---|
1230 | pThis->pAioMgr = hAioMgr;
|
---|
1231 | pThis->pvUser = pvUser;
|
---|
1232 | pThis->pfnReqCompleted = pfnReqComplete;
|
---|
1233 | RTQueueAtomicInit(&pThis->QueueReqs);
|
---|
1234 | RTListInit(&pThis->AioMgr.ListWaitingReqs);
|
---|
1235 | RTAioMgrRetain(hAioMgr);
|
---|
1236 | rc = RTFileAioCtxAssociateWithFile(pThis->pAioMgr->hAioCtx, hFile);
|
---|
1237 | if (RT_FAILURE(rc))
|
---|
1238 | rtAioMgrFileDestroy(pThis);
|
---|
1239 | else
|
---|
1240 | rtAioMgrAddFile(pThis->pAioMgr, pThis);
|
---|
1241 | }
|
---|
1242 | else
|
---|
1243 | rc = VERR_NO_MEMORY;
|
---|
1244 |
|
---|
1245 | if (RT_SUCCESS(rc))
|
---|
1246 | *phAioMgrFile = pThis;
|
---|
1247 |
|
---|
1248 | return rc;
|
---|
1249 | }
|
---|
1250 |
|
---|
1251 | RTDECL(uint32_t) RTAioMgrFileRetain(RTAIOMGRFILE hAioMgrFile)
|
---|
1252 | {
|
---|
1253 | PRTAIOMGRFILEINT pThis = hAioMgrFile;
|
---|
1254 | AssertReturn(hAioMgrFile != NIL_RTAIOMGRFILE, UINT32_MAX);
|
---|
1255 | AssertPtrReturn(pThis, UINT32_MAX);
|
---|
1256 | AssertReturn(pThis->u32Magic == RTAIOMGRFILE_MAGIC, UINT32_MAX);
|
---|
1257 |
|
---|
1258 | uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
|
---|
1259 | AssertMsg(cRefs > 1 && cRefs < _1G, ("%#x %p\n", cRefs, pThis));
|
---|
1260 | return cRefs;
|
---|
1261 | }
|
---|
1262 |
|
---|
1263 | RTDECL(uint32_t) RTAioMgrFileRelease(RTAIOMGRFILE hAioMgrFile)
|
---|
1264 | {
|
---|
1265 | PRTAIOMGRFILEINT pThis = hAioMgrFile;
|
---|
1266 | if (pThis == NIL_RTAIOMGRFILE)
|
---|
1267 | return 0;
|
---|
1268 | AssertPtrReturn(pThis, UINT32_MAX);
|
---|
1269 | AssertReturn(pThis->u32Magic == RTAIOMGRFILE_MAGIC, UINT32_MAX);
|
---|
1270 |
|
---|
1271 | uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
|
---|
1272 | AssertMsg(cRefs < _1G, ("%#x %p\n", cRefs, pThis));
|
---|
1273 | if (cRefs == 0)
|
---|
1274 | rtAioMgrFileDestroy(pThis);
|
---|
1275 | return cRefs;
|
---|
1276 | }
|
---|
1277 |
|
---|
1278 | RTDECL(void *) RTAioMgrFileGetUser(RTAIOMGRFILE hAioMgrFile)
|
---|
1279 | {
|
---|
1280 | PRTAIOMGRFILEINT pThis = hAioMgrFile;
|
---|
1281 |
|
---|
1282 | AssertPtrReturn(pThis, NULL);
|
---|
1283 | return pThis->pvUser;
|
---|
1284 | }
|
---|
1285 |
|
---|
1286 | RTDECL(int) RTAioMgrFileRead(RTAIOMGRFILE hAioMgrFile, RTFOFF off,
|
---|
1287 | PRTSGBUF pSgBuf, size_t cbRead, void *pvUser)
|
---|
1288 | {
|
---|
1289 | return rtAioMgrFileIoReqCreate(hAioMgrFile, off, pSgBuf, cbRead, pvUser,
|
---|
1290 | RTAIOMGRREQTYPE_READ);
|
---|
1291 | }
|
---|
1292 |
|
---|
1293 | RTDECL(int) RTAioMgrFileWrite(RTAIOMGRFILE hAioMgrFile, RTFOFF off,
|
---|
1294 | PRTSGBUF pSgBuf, size_t cbWrite, void *pvUser)
|
---|
1295 | {
|
---|
1296 | return rtAioMgrFileIoReqCreate(hAioMgrFile, off, pSgBuf, cbWrite, pvUser,
|
---|
1297 | RTAIOMGRREQTYPE_WRITE);
|
---|
1298 | }
|
---|
1299 |
|
---|
1300 | RTDECL(int) RTAioMgrFileFlush(RTAIOMGRFILE hAioMgrFile, void *pvUser)
|
---|
1301 | {
|
---|
1302 | PRTAIOMGRFILEINT pFile = hAioMgrFile;
|
---|
1303 | PRTAIOMGRINT pAioMgr;
|
---|
1304 |
|
---|
1305 | AssertPtrReturn(pFile, VERR_INVALID_HANDLE);
|
---|
1306 |
|
---|
1307 | pAioMgr = pFile->pAioMgr;
|
---|
1308 |
|
---|
1309 | PRTAIOMGRREQ pReq = rtAioMgrReqAlloc(pAioMgr);
|
---|
1310 | if (RT_UNLIKELY(!pReq))
|
---|
1311 | return VERR_NO_MEMORY;
|
---|
1312 |
|
---|
1313 | pReq->pFile = pFile;
|
---|
1314 | pReq->enmType = RTAIOMGRREQTYPE_FLUSH;
|
---|
1315 | pReq->pvUser = pvUser;
|
---|
1316 | rtAioMgrFileQueueReq(pFile, pReq);
|
---|
1317 |
|
---|
1318 | return VERR_FILE_AIO_IN_PROGRESS;
|
---|
1319 | }
|
---|
1320 |
|
---|