X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_guts.c;h=74b73ddefc3d36c351b25b8b3041380c703d3ee7;hp=d89b87af44eced13f0f7bd0a584581cc579f2914;hb=9b9950b65bae80f37e783de48d424ff4691a201b;hpb=c8b56f564ace4a2052d1e74e2b96c6532dd4ef44 diff --git a/yaffs_guts.c b/yaffs_guts.c index d89b87a..74b73dd 100644 --- a/yaffs_guts.c +++ b/yaffs_guts.c @@ -12,7 +12,7 @@ */ const char *yaffs_guts_c_version = - "$Id: yaffs_guts.c,v 1.82 2009-03-09 04:24:17 charles Exp $"; + "$Id: yaffs_guts.c,v 1.91 2009-10-15 00:45:46 charles Exp $"; #include "yportenv.h" @@ -49,6 +49,7 @@ static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND, const yaffs_ExtendedTags *tags); /* Other local prototypes */ +static void yaffs_UpdateParent(yaffs_Object *obj); static int yaffs_UnlinkObject(yaffs_Object *obj); static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj); @@ -759,7 +760,7 @@ static void yaffs_VerifyObject(yaffs_Object *obj) chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1; chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax); - chunkIdOk = chunkInRange || obj->hdrChunk == 0; + chunkIdOk = chunkInRange || (obj->hdrChunk == 0); chunkValid = chunkInRange && yaffs_CheckChunkBit(dev, obj->hdrChunk / dev->nChunksPerBlock, @@ -1544,11 +1545,16 @@ static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk, for (j = 0; theChunk && j < dev->chunkGroupSize; j++) { if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock, theChunk % dev->nChunksPerBlock)) { - yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, - tags); - if (yaffs_TagsMatch(tags, objectId, chunkInInode)) { - /* found it; */ + + if(dev->chunkGroupSize == 1) return theChunk; + else { + yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, + tags); + if (yaffs_TagsMatch(tags, objectId, chunkInInode)) { + /* found it; */ + return theChunk; + } } } theChunk++; @@ -2345,6 +2351,7 @@ static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type, in = NULL; } + yaffs_UpdateParent(parent); } return in; @@ -2459,6 +2466,8 @@ int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, yaffs_Object *obj = NULL; yaffs_Object *existingTarget = NULL; int force = 0; + int result; + yaffs_Device *dev; if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) @@ -2466,6 +2475,8 @@ int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) YBUG(); + dev = oldDir->myDev; + #ifdef CONFIG_YAFFS_CASE_INSENSITIVE /* Special case for case insemsitive systems (eg. WinCE). * While look-up is case insensitive, the name isn't. @@ -2475,7 +2486,7 @@ int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, force = 1; #endif - else if (yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH) + if(yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH) /* ENAMETOOLONG */ return YAFFS_FAIL; @@ -2493,14 +2504,26 @@ int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */ } else if (existingTarget && existingTarget != obj) { /* Nuke the target first, using shadowing, - * but only if it isn't the same object + * but only if it isn't the same object. + * + * Note we must disable gc otherwise it can mess up the shadowing. + * */ + dev->isDoingGC=1; yaffs_ChangeObjectName(obj, newDir, newName, force, existingTarget->objectId); + existingTarget->isShadowed = 1; yaffs_UnlinkObject(existingTarget); + dev->isDoingGC=0; } - return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0); + result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0); + + yaffs_UpdateParent(oldDir); + if(newDir != oldDir) + yaffs_UpdateParent(newDir); + + return result; } return YAFFS_FAIL; } @@ -2964,7 +2987,6 @@ static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block, isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT); - bi->blockState = YAFFS_BLOCK_STATE_COLLECTING; T(YAFFS_TRACE_TRACING, (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR), @@ -2975,12 +2997,16 @@ static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block, /*yaffs_VerifyFreeChunks(dev); */ + if(bi->blockState == YAFFS_BLOCK_STATE_FULL) + bi->blockState = YAFFS_BLOCK_STATE_COLLECTING; + bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */ /* Take off the number of soft deleted entries because * they're going to get really deleted during GC. */ - dev->nFreeChunks -= bi->softDeletions; + if(dev->gcChunk == 0) /* first time through for this block */ + dev->nFreeChunks -= bi->softDeletions; dev->isDoingGC = 1; @@ -3624,7 +3650,7 @@ static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode, newTags.chunkId = chunkInInode; newTags.objectId = in->objectId; newTags.serialNumber = - (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1; + (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1; newTags.byteCount = nBytes; if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) { @@ -3640,7 +3666,7 @@ static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode, if (newChunkId >= 0) { yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0); - if (prevChunkId >= 0) + if (prevChunkId > 0) yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__); yaffs_CheckFileSanity(in); @@ -3726,7 +3752,7 @@ int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force, if (name && *name) { memset(oh->name, 0, sizeof(oh->name)); yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH); - } else if (prevChunkId >= 0) + } else if (prevChunkId > 0) memcpy(oh->name, oldName, sizeof(oh->name)); else memset(oh->name, 0, sizeof(oh->name)); @@ -3784,13 +3810,13 @@ int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force, /* Create new chunk in NAND */ newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, - (prevChunkId >= 0) ? 1 : 0); + (prevChunkId > 0) ? 1 : 0); if (newChunkId >= 0) { in->hdrChunk = newChunkId; - if (prevChunkId >= 0) { + if (prevChunkId > 0) { yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__); } @@ -5018,11 +5044,13 @@ int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize) } - /* Write a new object header. + /* Write a new object header to reflect the resize. * show we've shrunk the file, if need be - * Do this only if the file is not in the deleted directories. + * Do this only if the file is not in the deleted directories + * and is not shadowed. */ if (in->parent && + !in->isShadowed && in->parent->objectId != YAFFS_OBJECTID_UNLINKED && in->parent->objectId != YAFFS_OBJECTID_DELETED) yaffs_UpdateObjectHeader(in, NULL, 0, @@ -5047,23 +5075,27 @@ loff_t yaffs_GetFileSize(yaffs_Object *obj) -int yaffs_FlushFile(yaffs_Object *in, int updateTime) +int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync) { int retVal; if (in->dirty) { yaffs_FlushFilesChunkCache(in); - if (updateTime) { + if(dataSync) /* Only sync data */ + retVal=YAFFS_OK; + else { + if (updateTime) { #ifdef CONFIG_YAFFS_WINCE - yfsd_WinFileTimeNow(in->win_mtime); + yfsd_WinFileTimeNow(in->win_mtime); #else - in->yst_mtime = Y_CURRENT_TIME; + in->yst_mtime = Y_CURRENT_TIME; #endif - } + } - retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >= - 0) ? YAFFS_OK : YAFFS_FAIL; + retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >= + 0) ? YAFFS_OK : YAFFS_FAIL; + } } else { retVal = YAFFS_OK; } @@ -5164,14 +5196,19 @@ int yaffs_DeleteFile(yaffs_Object *in) } } -static int yaffs_DeleteDirectory(yaffs_Object *in) +static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj) { - /* First check that the directory is empty. */ - if (ylist_empty(&in->variant.directoryVariant.children)) - return yaffs_DoGenericObjectDeletion(in); + return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) && + !(ylist_empty(&obj->variant.directoryVariant.children)); +} - return YAFFS_FAIL; +static int yaffs_DeleteDirectory(yaffs_Object *obj) +{ + /* First check that the directory is empty. */ + if (yaffs_IsNonEmptyDirectory(obj)) + return YAFFS_FAIL; + return yaffs_DoGenericObjectDeletion(obj); } static int yaffs_DeleteSymLink(yaffs_Object *in) @@ -5230,6 +5267,9 @@ static int yaffs_UnlinkWorker(yaffs_Object *obj) immediateDeletion = 1; #endif + if(obj) + yaffs_UpdateParent(obj->parent); + if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { return yaffs_DeleteHardLink(obj); } else if (!ylist_empty(&obj->hardLinks)) { @@ -5284,7 +5324,9 @@ static int yaffs_UnlinkWorker(yaffs_Object *obj) default: return YAFFS_FAIL; } - } else + } else if(yaffs_IsNonEmptyDirectory(obj)) + return YAFFS_FAIL; + else return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir, _Y("unlinked"), 0, 0); } @@ -5323,7 +5365,8 @@ static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId, /* Handle YAFFS2 case (backward scanning) * If the shadowed object exists then ignore. */ - if (yaffs_FindObjectByNumber(dev, objId)) + obj = yaffs_FindObjectByNumber(dev, objId); + if(obj) return; } @@ -5335,6 +5378,7 @@ static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId, YAFFS_OBJECT_TYPE_FILE); if (!obj) return; + obj->isShadowed = 1; yaffs_AddObjectToDirectory(dev->unlinkedDir, obj); obj->variant.fileVariant.shrinkSize = 0; obj->valid = 1; /* So that we don't read any other info for this file */ @@ -6252,9 +6296,7 @@ static int yaffs_ScanBackwards(yaffs_Device *dev) } if (!in || -#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD - !in->valid || -#endif + (!in->valid && dev->disableLazyLoad) || tags.extraShadows || (!in->valid && (tags.objectId == YAFFS_OBJECTID_ROOT || @@ -6666,6 +6708,26 @@ static void yaffs_VerifyDirectory(yaffs_Object *directory) } } +/* + *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new + * link (ie. name) is created or deleted in the directory. + * + * ie. + * create dir/a : update dir's mtime/ctime + * rm dir/a: update dir's mtime/ctime + * modify dir/a: don't update dir's mtimme/ctime + */ + +static void yaffs_UpdateParent(yaffs_Object *obj) +{ + if(!obj) + return; + + obj->dirty = 1; + obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME; + + yaffs_UpdateObjectHeader(obj,NULL,0,0,0); +} static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj) { @@ -6683,11 +6745,10 @@ static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj) ylist_del_init(&obj->siblings); obj->parent = NULL; - + yaffs_VerifyDirectory(parent); } - static void yaffs_AddObjectToDirectory(yaffs_Object *directory, yaffs_Object *obj) { @@ -6781,7 +6842,7 @@ yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory, * Do a real check */ yaffs_GetObjectName(l, buffer, - YAFFS_MAX_NAME_LENGTH); + YAFFS_MAX_NAME_LENGTH + 1); if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0) return l; } @@ -7030,7 +7091,7 @@ int yaffs_DumpObject(yaffs_Object *obj) { YCHAR name[257]; - yaffs_GetObjectName(obj, name, 256); + yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1); T(YAFFS_TRACE_ALWAYS, (TSTR