Mercurial > yaffs-ecoscentric-gpl

annotate yaffs_checkptrw.c @ 391:d0784604eafd

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Fix typo (and check git is working)
author Wookey <wookey@wookware.org>
date Thu, 18 Mar 2010 21:44:53 +0000
parents 7ee0cc4ba753
children b5309c9b6d7f
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1 /*
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2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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3 *
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4 * Copyright (C) 2002-2007 Aleph One Ltd.
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5 * for Toby Churchill Ltd and Brightstar Engineering
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6 *
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7 * Created by Charles Manning <charles@aleph1.co.uk>
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8 *
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9 * This program is free software; you can redistribute it and/or modify
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10 * it under the terms of the GNU General Public License version 2 as
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11 * published by the Free Software Foundation.
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12 */
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13
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14 const char *yaffs_checkptrw_c_version =
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15 "$Id: yaffs_checkptrw.c,v 1.23 2010-02-18 01:18:04 charles Exp $";
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16
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17
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18 #include "yaffs_checkptrw.h"
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19 #include "yaffs_getblockinfo.h"
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20
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21 static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
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22 {
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23 int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks;
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24
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25 T(YAFFS_TRACE_CHECKPOINT,
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26 (TSTR("checkpt blocks available = %d" TENDSTR),
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27 blocksAvailable));
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28
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29 return (blocksAvailable <= 0) ? 0 : 1;
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30 }
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31
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32
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33 static int yaffs_CheckpointErase(yaffs_Device *dev)
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34 {
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35 int i;
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36
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37 if (!dev->param.eraseBlockInNAND)
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38 return 0;
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39 T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR),
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40 dev->internalStartBlock, dev->internalEndBlock));
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41
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42 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
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43 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
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44 if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
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45 T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i));
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46
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47 dev->nBlockErasures++;
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48
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49 if (dev->param.eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
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50 bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
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51 dev->nErasedBlocks++;
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52 dev->nFreeChunks += dev->param.nChunksPerBlock;
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53 } else {
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54 dev->param.markNANDBlockBad(dev, i);
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55 bi->blockState = YAFFS_BLOCK_STATE_DEAD;
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56 }
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57 }
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58 }
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59
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60 dev->blocksInCheckpoint = 0;
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61
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62 return 1;
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63 }
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64
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65
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66 static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev)
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67 {
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68 int i;
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69 int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks;
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70 T(YAFFS_TRACE_CHECKPOINT,
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71 (TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR),
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72 dev->nErasedBlocks, dev->param.nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
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73
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74 if (dev->checkpointNextBlock >= 0 &&
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75 dev->checkpointNextBlock <= dev->internalEndBlock &&
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76 blocksAvailable > 0) {
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77
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78 for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
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79 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
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80 if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
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81 dev->checkpointNextBlock = i + 1;
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82 dev->checkpointCurrentBlock = i;
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83 T(YAFFS_TRACE_CHECKPOINT, (TSTR("allocating checkpt block %d"TENDSTR), i));
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84 return;
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85 }
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86 }
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87 }
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88 T(YAFFS_TRACE_CHECKPOINT, (TSTR("out of checkpt blocks"TENDSTR)));
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89
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90 dev->checkpointNextBlock = -1;
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91 dev->checkpointCurrentBlock = -1;
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92 }
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93
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94 static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
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95 {
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96 int i;
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97 yaffs_ExtendedTags tags;
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98
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99 T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR),
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100 dev->blocksInCheckpoint, dev->checkpointNextBlock));
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101
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102 if (dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
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103 for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
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104 int chunk = i * dev->param.nChunksPerBlock;
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105 int realignedChunk = chunk - dev->chunkOffset;
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106
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107 dev->param.readChunkWithTagsFromNAND(dev, realignedChunk,
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108 NULL, &tags);
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109 T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR),
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110 i, tags.objectId, tags.sequenceNumber, tags.eccResult));
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111
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112 if (tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) {
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113 /* Right kind of block */
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114 dev->checkpointNextBlock = tags.objectId;
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115 dev->checkpointCurrentBlock = i;
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116 dev->checkpointBlockList[dev->blocksInCheckpoint] = i;
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117 dev->blocksInCheckpoint++;
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118 T(YAFFS_TRACE_CHECKPOINT, (TSTR("found checkpt block %d"TENDSTR), i));
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119 return;
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120 }
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121 }
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122
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123 T(YAFFS_TRACE_CHECKPOINT, (TSTR("found no more checkpt blocks"TENDSTR)));
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124
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125 dev->checkpointNextBlock = -1;
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126 dev->checkpointCurrentBlock = -1;
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127 }
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128
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129
127
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130 int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
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131 {
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132
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133
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134 dev->checkpointOpenForWrite = forWriting;
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135
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136 /* Got the functions we need? */
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137 if (!dev->param.writeChunkWithTagsToNAND ||
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138 !dev->param.readChunkWithTagsFromNAND ||
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139 !dev->param.eraseBlockInNAND ||
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140 !dev->param.markNANDBlockBad)
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141 return 0;
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142
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143 if (forWriting && !yaffs_CheckpointSpaceOk(dev))
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144 return 0;
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145
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146 if (!dev->checkpointBuffer)
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147 dev->checkpointBuffer = YMALLOC_DMA(dev->param.totalBytesPerChunk);
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148 if (!dev->checkpointBuffer)
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149 return 0;
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150
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151
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152 dev->checkpointPageSequence = 0;
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153 dev->checkpointByteCount = 0;
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154 dev->checkpointSum = 0;
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155 dev->checkpointXor = 0;
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156 dev->checkpointCurrentBlock = -1;
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diff changeset
157 dev->checkpointCurrentChunk = -1;
152
043b849c6ea3 Fix block offset with checkpointing
charles <charles>
parents: 150
diff changeset
158 dev->checkpointNextBlock = dev->internalStartBlock;
198
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parents: 176
diff changeset
159
127
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160 /* Erase all the blocks in the checkpoint area */
271
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parents: 215
diff changeset
161 if (forWriting) {
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parents: 215
diff changeset
162 memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
129
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
163 dev->checkpointByteOffset = 0;
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parents: 127
diff changeset
164 return yaffs_CheckpointErase(dev);
127
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charles <charles>
parents:
diff changeset
165 } else {
129
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
166 int i;
127
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167 /* Set to a value that will kick off a read */
146
1a32267ef1c1 Add large NAND support and improve retirement handling
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parents: 132
diff changeset
168 dev->checkpointByteOffset = dev->nDataBytesPerChunk;
129
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
169 /* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully)
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
170 * going to be way more than we need */
131
99e93a234aba Fix some checkpoint stuff, add qsort
charles <charles>
parents: 129
diff changeset
171 dev->blocksInCheckpoint = 0;
152
043b849c6ea3 Fix block offset with checkpointing
charles <charles>
parents: 150
diff changeset
172 dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2;
129
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
173 dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks);
283
3d49e1185b42 Handle malloc failure in checkpoint open.
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parents: 271
diff changeset
174 if(!dev->checkpointBlockList)
3d49e1185b42 Handle malloc failure in checkpoint open.
charles <charles>
parents: 271
diff changeset
175 return 0;
3d49e1185b42 Handle malloc failure in checkpoint open.
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parents: 271
diff changeset
176
271
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diff changeset
177 for (i = 0; i < dev->checkpointMaxBlocks; i++)
129
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parents: 127
diff changeset
178 dev->checkpointBlockList[i] = -1;
127
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179 }
198
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diff changeset
180
127
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181 return 1;
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parents:
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182 }
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183
176
570d9d4cac30 Adding checkpoint and robustness improvements
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parents: 171
diff changeset
184 int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
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parents: 171
diff changeset
185 {
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parents: 171
diff changeset
186 __u32 compositeSum;
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parents: 171
diff changeset
187 compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF);
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parents: 171
diff changeset
188 *sum = compositeSum;
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diff changeset
189 return 1;
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parents: 171
diff changeset
190 }
570d9d4cac30 Adding checkpoint and robustness improvements
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parents: 171
diff changeset
191
127
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192 static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
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193 {
129
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
194 int chunk;
159
5f4c756ac1d3 Fix offset problem in checkpt code
charles <charles>
parents: 158
diff changeset
195 int realignedChunk;
127
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parents:
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196
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197 yaffs_ExtendedTags tags;
198
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parents: 176
diff changeset
198
271
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diff changeset
199 if (dev->checkpointCurrentBlock < 0) {
129
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
200 yaffs_CheckpointFindNextErasedBlock(dev);
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
201 dev->checkpointCurrentChunk = 0;
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parents: 127
diff changeset
202 }
198
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parents: 176
diff changeset
203
271
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diff changeset
204 if (dev->checkpointCurrentBlock < 0)
129
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parents: 127
diff changeset
205 return 0;
198
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parents: 176
diff changeset
206
127
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parents:
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207 tags.chunkDeleted = 0;
129
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
208 tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
209 tags.chunkId = dev->checkpointPageSequence + 1;
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
210 tags.sequenceNumber = YAFFS_SEQUENCE_CHECKPOINT_DATA;
146
1a32267ef1c1 Add large NAND support and improve retirement handling
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parents: 132
diff changeset
211 tags.byteCount = dev->nDataBytesPerChunk;
271
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parents: 215
diff changeset
212 if (dev->checkpointCurrentChunk == 0) {
132
f0d1a05787e4 Fix problem with checkpoint free space handling
charles <charles>
parents: 131
diff changeset
213 /* First chunk we write for the block? Set block state to
f0d1a05787e4 Fix problem with checkpoint free space handling
charles <charles>
parents: 131
diff changeset
214 checkpoint */
271
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parents: 215
diff changeset
215 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointCurrentBlock);
132
f0d1a05787e4 Fix problem with checkpoint free space handling
charles <charles>
parents: 131
diff changeset
216 bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
f0d1a05787e4 Fix problem with checkpoint free space handling
charles <charles>
parents: 131
diff changeset
217 dev->blocksInCheckpoint++;
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charles <charles>
parents: 131
diff changeset
218 }
198
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
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parents: 176
diff changeset
219
356
7ee0cc4ba753 Rationalise context and parameter handling
charles <charles>
parents: 309
diff changeset
220 chunk = dev->checkpointCurrentBlock * dev->param.nChunksPerBlock + dev->checkpointCurrentChunk;
159
5f4c756ac1d3 Fix offset problem in checkpt code
charles <charles>
parents: 158
diff changeset
221
198
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parents: 176
diff changeset
222
271
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parents: 215
diff changeset
223 T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
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parents: 215
diff changeset
224 chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk, tags.objectId, tags.chunkId));
198
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parents: 176
diff changeset
225
159
5f4c756ac1d3 Fix offset problem in checkpt code
charles <charles>
parents: 158
diff changeset
226 realignedChunk = chunk - dev->chunkOffset;
198
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parents: 176
diff changeset
227
288
b20bce8ec7a2 Rationalise stats gathering for nand access. Does not instrument mounting.
charles <charles>
parents: 283
diff changeset
228 dev->nPageWrites++;
b20bce8ec7a2 Rationalise stats gathering for nand access. Does not instrument mounting.
charles <charles>
parents: 283
diff changeset
229
356
7ee0cc4ba753 Rationalise context and parameter handling
charles <charles>
parents: 309
diff changeset
230 dev->param.writeChunkWithTagsToNAND(dev, realignedChunk,
271
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parents: 215
diff changeset
231 dev->checkpointBuffer, &tags);
129
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
232 dev->checkpointByteOffset = 0;
198
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
wookey <wookey>
parents: 176
diff changeset
233 dev->checkpointPageSequence++;
129
5bc7e85eac5b Add non-partitioned checkpointing
charles <charles>
parents: 127
diff changeset
234 dev->checkpointCurrentChunk++;
356
7ee0cc4ba753 Rationalise context and parameter handling
charles <charles>
parents: 309
diff changeset
235 if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock) {
129
5bc7e85eac5b Add non-partitioned checkpointing
charles <charles>
parents: 127
diff changeset
236 dev->checkpointCurrentChunk = 0;
5bc7e85eac5b Add non-partitioned checkpointing
charles <charles>
parents: 127
diff changeset
237 dev->checkpointCurrentBlock = -1;
127
f8fc631acf25 Checkpointing changes
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parents:
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238 }
271
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parents: 215
diff changeset
239 memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
198
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parents: 176
diff changeset
240
127
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
241 return 1;
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
242 }
f8fc631acf25 Checkpointing changes
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parents:
diff changeset
243
129
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
244
271
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parents: 215
diff changeset
245 int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
127
f8fc631acf25 Checkpointing changes
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parents:
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246 {
271
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diff changeset
247 int i = 0;
127
f8fc631acf25 Checkpointing changes
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parents:
diff changeset
248 int ok = 1;
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parents:
diff changeset
249
198
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parents: 176
diff changeset
250
127
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
251 __u8 * dataBytes = (__u8 *)data;
198
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
wookey <wookey>
parents: 176
diff changeset
252
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
wookey <wookey>
parents: 176
diff changeset
253
127
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parents:
diff changeset
254
271
c0dfae9e8073 Major whitespace/style changes to match Linux checkpatch.pl code style
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parents: 215
diff changeset
255 if (!dev->checkpointBuffer)
127
f8fc631acf25 Checkpointing changes
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parents:
diff changeset
256 return 0;
198
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
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parents: 176
diff changeset
257
271
c0dfae9e8073 Major whitespace/style changes to match Linux checkpatch.pl code style
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parents: 215
diff changeset
258 if (!dev->checkpointOpenForWrite)
176
570d9d4cac30 Adding checkpoint and robustness improvements
charles <charles>
parents: 171
diff changeset
259 return -1;
127
f8fc631acf25 Checkpointing changes
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parents:
diff changeset
260
271
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wookey <wookey>
parents: 215
diff changeset
261 while (i < nBytes && ok) {
c0dfae9e8073 Major whitespace/style changes to match Linux checkpatch.pl code style
wookey <wookey>
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diff changeset
262 dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes;
176
570d9d4cac30 Adding checkpoint and robustness improvements
charles <charles>
parents: 171
diff changeset
263 dev->checkpointSum += *dataBytes;
570d9d4cac30 Adding checkpoint and robustness improvements
charles <charles>
parents: 171
diff changeset
264 dev->checkpointXor ^= *dataBytes;
198
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
wookey <wookey>
parents: 176
diff changeset
265
127
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
266 dev->checkpointByteOffset++;
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
267 i++;
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
268 dataBytes++;
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
269 dev->checkpointByteCount++;
198
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
wookey <wookey>
parents: 176
diff changeset
270
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
wookey <wookey>
parents: 176
diff changeset
271
271
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wookey <wookey>
parents: 215
diff changeset
272 if (dev->checkpointByteOffset < 0 ||
198
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
wookey <wookey>
parents: 176
diff changeset
273 dev->checkpointByteOffset >= dev->nDataBytesPerChunk)
127
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
274 ok = yaffs_CheckpointFlushBuffer(dev);
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
275 }
198
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
wookey <wookey>
parents: 176
diff changeset
276
271
c0dfae9e8073 Major whitespace/style changes to match Linux checkpatch.pl code style
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diff changeset
277 return i;
127
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
278 }
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
279
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
280 int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
281 {
271
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parents: 215
diff changeset
282 int i = 0;
127
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
283 int ok = 1;
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
284 yaffs_ExtendedTags tags;
129
5bc7e85eac5b Add non-partitioned checkpointing
charles <charles>
parents: 127
diff changeset
285
198
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
wookey <wookey>
parents: 176
diff changeset
286
129
5bc7e85eac5b Add non-partitioned checkpointing
charles <charles>
parents: 127
diff changeset
287 int chunk;
159
5f4c756ac1d3 Fix offset problem in checkpt code
charles <charles>
parents: 158
diff changeset
288 int realignedChunk;
127
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
289
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
290 __u8 *dataBytes = (__u8 *)data;
198
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wookey <wookey>
parents: 176
diff changeset
291
271
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wookey <wookey>
parents: 215
diff changeset
292 if (!dev->checkpointBuffer)
127
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charles <charles>
parents:
diff changeset
293 return 0;
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
294
271
c0dfae9e8073 Major whitespace/style changes to match Linux checkpatch.pl code style
wookey <wookey>
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diff changeset
295 if (dev->checkpointOpenForWrite)
176
570d9d4cac30 Adding checkpoint and robustness improvements
charles <charles>
parents: 171
diff changeset
296 return -1;
570d9d4cac30 Adding checkpoint and robustness improvements
charles <charles>
parents: 171
diff changeset
297
271
c0dfae9e8073 Major whitespace/style changes to match Linux checkpatch.pl code style
wookey <wookey>
parents: 215
diff changeset
298 while (i < nBytes && ok) {
198
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
wookey <wookey>
parents: 176
diff changeset
299
b7f785925166 Cleanup patch - Remove all trailing whitespace and fix a few typos.
wookey <wookey>
parents: 176
diff changeset
300
271
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wookey <wookey>
parents: 215
diff changeset
301 if (dev->checkpointByteOffset < 0 ||
c0dfae9e8073 Major whitespace/style changes to match Linux checkpatch.pl code style
wookey <wookey>
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diff changeset
302 dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
198
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wookey <wookey>
parents: 176
diff changeset
303
271
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wookey <wookey>
parents: 215
diff changeset
304 if (dev->checkpointCurrentBlock < 0) {
129
5bc7e85eac5b Add non-partitioned checkpointing
charles <charles>
parents: 127
diff changeset
305 yaffs_CheckpointFindNextCheckpointBlock(dev);
5bc7e85eac5b Add non-partitioned checkpointing
charles <charles>
parents: 127
diff changeset
306 dev->checkpointCurrentChunk = 0;
127
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
307 }
198
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parents: 176
diff changeset
308
271
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wookey <wookey>
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diff changeset
309 if (dev->checkpointCurrentBlock < 0)
129
5bc7e85eac5b Add non-partitioned checkpointing
charles <charles>
parents: 127
diff changeset
310 ok = 0;
5bc7e85eac5b Add non-partitioned checkpointing
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parents: 127
diff changeset
311 else {
271
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diff changeset
312 chunk = dev->checkpointCurrentBlock *
356
7ee0cc4ba753 Rationalise context and parameter handling
charles <charles>
parents: 309
diff changeset
313 dev->param.nChunksPerBlock +
271
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wookey <wookey>
parents: 215
diff changeset
314 dev->checkpointCurrentChunk;
127
f8fc631acf25 Checkpointing changes
charles <charles>
parents:
diff changeset
315
159
5f4c756ac1d3 Fix offset problem in checkpt code
charles <charles>
parents: 158
diff changeset
316 realignedChunk = chunk - dev->chunkOffset;
288
b20bce8ec7a2 Rationalise stats gathering for nand access. Does not instrument mounting.
charles <charles>
parents: 283
diff changeset
317
b20bce8ec7a2 Rationalise stats gathering for nand access. Does not instrument mounting.
charles <charles>
parents: 283
diff changeset
318 dev->nPageReads++;
159
5f4c756ac1d3 Fix offset problem in checkpt code
charles <charles>
parents: 158
diff changeset
319
271
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320 /* read in the next chunk */
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321 /* printf("read checkpoint page %d\n",dev->checkpointPage); */
356
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322 dev->param.readChunkWithTagsFromNAND(dev,
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323 realignedChunk,
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324 dev->checkpointBuffer,
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325 &tags);
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326
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327 if (tags.chunkId != (dev->checkpointPageSequence + 1) ||
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328 tags.eccResult > YAFFS_ECC_RESULT_FIXED ||
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329 tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA)
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330 ok = 0;
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331
129
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332 dev->checkpointByteOffset = 0;
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333 dev->checkpointPageSequence++;
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334 dev->checkpointCurrentChunk++;
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335
356
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336 if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock)
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337 dev->checkpointCurrentBlock = -1;
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338 }
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339 }
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340
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341 if (ok) {
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342 *dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset];
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343 dev->checkpointSum += *dataBytes;
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344 dev->checkpointXor ^= *dataBytes;
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345 dev->checkpointByteOffset++;
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346 i++;
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347 dataBytes++;
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348 dev->checkpointByteCount++;
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349 }
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350 }
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351
127
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352 return i;
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353 }
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354
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355 int yaffs_CheckpointClose(yaffs_Device *dev)
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356 {
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357
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358 if (dev->checkpointOpenForWrite) {
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359 if (dev->checkpointByteOffset != 0)
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360 yaffs_CheckpointFlushBuffer(dev);
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361 } else if(dev->checkpointBlockList){
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362 int i;
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363 for (i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++) {
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364 int blk = dev->checkpointBlockList[i];
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365 yaffs_BlockInfo *bi = NULL;
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366 if( dev->internalStartBlock <= blk && blk <= dev->internalEndBlock)
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367 bi = yaffs_GetBlockInfo(dev, blk);
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368 if (bi && bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
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369 bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
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370 else {
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371 /* Todo this looks odd... */
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372 }
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373 }
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374 YFREE(dev->checkpointBlockList);
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375 dev->checkpointBlockList = NULL;
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376 }
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377
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378 dev->nFreeChunks -= dev->blocksInCheckpoint * dev->param.nChunksPerBlock;
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379 dev->nErasedBlocks -= dev->blocksInCheckpoint;
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380
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381
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382 T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint byte count %d" TENDSTR),
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383 dev->checkpointByteCount));
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384
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385 if (dev->checkpointBuffer) {
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386 /* free the buffer */
127
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387 YFREE(dev->checkpointBuffer);
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388 dev->checkpointBuffer = NULL;
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389 return 1;
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390 } else
127
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391 return 0;
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392 }
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393
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394 int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)
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395 {
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396 /* Erase the checkpoint data */
127
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397
309
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398 T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate of %d blocks"TENDSTR),
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399 dev->blocksInCheckpoint));
127
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400
129
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401 return yaffs_CheckpointErase(dev);
127
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402 }
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403
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parents:
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404
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parents:
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405