627 lines
15 KiB
C
627 lines
15 KiB
C
/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2010 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "yaffs_verify.h"
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#include "yaffs_trace.h"
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#include "yaffs_bitmap.h"
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#include "yaffs_getblockinfo.h"
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#include "yaffs_nand.h"
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int yaffs_SkipVerification(yaffs_Device *dev)
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{
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dev=dev;
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return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
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}
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static int yaffs_SkipFullVerification(yaffs_Device *dev)
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{
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dev=dev;
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return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
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}
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static int yaffs_SkipNANDVerification(yaffs_Device *dev)
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{
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dev=dev;
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return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
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}
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static const char *blockStateName[] = {
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"Unknown",
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"Needs scanning",
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"Scanning",
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"Empty",
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"Allocating",
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"Full",
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"Dirty",
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"Checkpoint",
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"Collecting",
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"Dead"
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};
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void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
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{
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int actuallyUsed;
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int inUse;
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if (yaffs_SkipVerification(dev))
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return;
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/* Report illegal runtime states */
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if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
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T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
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switch (bi->blockState) {
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case YAFFS_BLOCK_STATE_UNKNOWN:
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case YAFFS_BLOCK_STATE_SCANNING:
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case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
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T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
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n, blockStateName[bi->blockState]));
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}
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/* Check pages in use and soft deletions are legal */
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actuallyUsed = bi->pagesInUse - bi->softDeletions;
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if (bi->pagesInUse < 0 || bi->pagesInUse > dev->param.nChunksPerBlock ||
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bi->softDeletions < 0 || bi->softDeletions > dev->param.nChunksPerBlock ||
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actuallyUsed < 0 || actuallyUsed > dev->param.nChunksPerBlock)
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T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
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n, bi->pagesInUse, bi->softDeletions));
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/* Check chunk bitmap legal */
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inUse = yaffs_CountChunkBits(dev, n);
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if (inUse != bi->pagesInUse)
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T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
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n, bi->pagesInUse, inUse));
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}
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void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
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{
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yaffs_VerifyBlock(dev, bi, n);
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/* After collection the block should be in the erased state */
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if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
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bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
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T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
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n, bi->blockState));
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}
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}
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void yaffs_VerifyBlocks(yaffs_Device *dev)
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{
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int i;
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int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
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int nIllegalBlockStates = 0;
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if (yaffs_SkipVerification(dev))
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return;
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memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
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for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
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yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
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yaffs_VerifyBlock(dev, bi, i);
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if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
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nBlocksPerState[bi->blockState]++;
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else
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nIllegalBlockStates++;
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}
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T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
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T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
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T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
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if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
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T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
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for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
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T(YAFFS_TRACE_VERIFY,
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(TSTR("%s %d blocks"TENDSTR),
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blockStateName[i], nBlocksPerState[i]));
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if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
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dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
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if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Erased block count wrong dev %d count %d"TENDSTR),
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dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
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if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
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nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
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T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
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}
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/*
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* Verify the object header. oh must be valid, but obj and tags may be NULL in which
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* case those tests will not be performed.
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*/
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void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
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{
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if (obj && yaffs_SkipVerification(obj->myDev))
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return;
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if (!(tags && obj && oh)) {
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR),
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tags, obj, oh));
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return;
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}
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if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
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oh->type > YAFFS_OBJECT_TYPE_MAX)
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
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tags->objectId, oh->type));
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if (tags->objectId != obj->objectId)
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d header mismatch objectId %d"TENDSTR),
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tags->objectId, obj->objectId));
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/*
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* Check that the object's parent ids match if parentCheck requested.
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*
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* Tests do not apply to the root object.
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*/
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if (parentCheck && tags->objectId > 1 && !obj->parent)
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
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tags->objectId, oh->parentObjectId));
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if (parentCheck && obj->parent &&
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oh->parentObjectId != obj->parent->objectId &&
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(oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
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obj->parent->objectId != YAFFS_OBJECTID_DELETED))
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
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tags->objectId, oh->parentObjectId, obj->parent->objectId));
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if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d header name is NULL"TENDSTR),
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obj->objectId));
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if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d header name is 0xFF"TENDSTR),
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obj->objectId));
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}
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#if 0
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/* Not being used, but don't want to throw away yet */
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int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
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__u32 level, int chunkOffset)
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{
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int i;
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yaffs_Device *dev = obj->myDev;
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int ok = 1;
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if (tn) {
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if (level > 0) {
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for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
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if (tn->internal[i]) {
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ok = yaffs_VerifyTnodeWorker(obj,
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tn->internal[i],
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level - 1,
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(chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
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}
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}
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} else if (level == 0) {
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yaffs_ExtendedTags tags;
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__u32 objectId = obj->objectId;
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chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
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for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
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__u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
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if (theChunk > 0) {
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/* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
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yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
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if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
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T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
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objectId, chunkOffset, theChunk,
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tags.objectId, tags.chunkId));
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}
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}
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chunkOffset++;
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}
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}
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}
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return ok;
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}
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#endif
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void yaffs_VerifyFile(yaffs_Object *obj)
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{
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int requiredTallness;
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int actualTallness;
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__u32 lastChunk;
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__u32 x;
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__u32 i;
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yaffs_Device *dev;
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yaffs_ExtendedTags tags;
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yaffs_Tnode *tn;
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__u32 objectId;
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if (!obj)
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return;
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if (yaffs_SkipVerification(obj->myDev))
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return;
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dev = obj->myDev;
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objectId = obj->objectId;
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/* Check file size is consistent with tnode depth */
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lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
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x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
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requiredTallness = 0;
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while (x > 0) {
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x >>= YAFFS_TNODES_INTERNAL_BITS;
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requiredTallness++;
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}
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actualTallness = obj->variant.fileVariant.topLevel;
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/* Check that the chunks in the tnode tree are all correct.
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* We do this by scanning through the tnode tree and
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* checking the tags for every chunk match.
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*/
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if (yaffs_SkipNANDVerification(dev))
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return;
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for (i = 1; i <= lastChunk; i++) {
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tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
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if (tn) {
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__u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
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if (theChunk > 0) {
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/* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
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yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
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if (tags.objectId != objectId || tags.chunkId != i) {
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T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
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objectId, i, theChunk,
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tags.objectId, tags.chunkId));
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}
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}
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}
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}
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}
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void yaffs_VerifyHardLink(yaffs_Object *obj)
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{
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if (obj && yaffs_SkipVerification(obj->myDev))
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return;
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/* Verify sane equivalent object */
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}
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void yaffs_VerifySymlink(yaffs_Object *obj)
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{
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if (obj && yaffs_SkipVerification(obj->myDev))
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return;
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/* Verify symlink string */
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}
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void yaffs_VerifySpecial(yaffs_Object *obj)
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{
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if (obj && yaffs_SkipVerification(obj->myDev))
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return;
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}
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void yaffs_VerifyObject(yaffs_Object *obj)
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{
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yaffs_Device *dev;
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__u32 chunkMin;
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__u32 chunkMax;
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__u32 chunkIdOk;
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__u32 chunkInRange;
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__u32 chunkShouldNotBeDeleted;
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__u32 chunkValid;
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if (!obj)
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return;
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if (obj->beingCreated)
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return;
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dev = obj->myDev;
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if (yaffs_SkipVerification(dev))
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return;
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/* Check sane object header chunk */
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chunkMin = dev->internalStartBlock * dev->param.nChunksPerBlock;
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chunkMax = (dev->internalEndBlock+1) * dev->param.nChunksPerBlock - 1;
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chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
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chunkIdOk = chunkInRange || (obj->hdrChunk == 0);
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chunkValid = chunkInRange &&
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yaffs_CheckChunkBit(dev,
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obj->hdrChunk / dev->param.nChunksPerBlock,
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obj->hdrChunk % dev->param.nChunksPerBlock);
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chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
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if (!obj->fake &&
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(!chunkIdOk || chunkShouldNotBeDeleted)) {
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
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obj->objectId, obj->hdrChunk,
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chunkIdOk ? "" : ",out of range",
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chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
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}
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if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
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yaffs_ExtendedTags tags;
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yaffs_ObjectHeader *oh;
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__u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
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oh = (yaffs_ObjectHeader *)buffer;
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yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
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&tags);
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yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
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yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
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}
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/* Verify it has a parent */
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if (obj && !obj->fake &&
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(!obj->parent || obj->parent->myDev != dev)) {
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
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obj->objectId, obj->parent));
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}
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/* Verify parent is a directory */
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if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
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obj->objectId, obj->parent->variantType));
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}
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switch (obj->variantType) {
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case YAFFS_OBJECT_TYPE_FILE:
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yaffs_VerifyFile(obj);
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break;
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case YAFFS_OBJECT_TYPE_SYMLINK:
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yaffs_VerifySymlink(obj);
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break;
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case YAFFS_OBJECT_TYPE_DIRECTORY:
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yaffs_VerifyDirectory(obj);
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break;
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case YAFFS_OBJECT_TYPE_HARDLINK:
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yaffs_VerifyHardLink(obj);
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break;
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case YAFFS_OBJECT_TYPE_SPECIAL:
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yaffs_VerifySpecial(obj);
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break;
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case YAFFS_OBJECT_TYPE_UNKNOWN:
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default:
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d has illegaltype %d"TENDSTR),
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obj->objectId, obj->variantType));
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break;
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}
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}
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void yaffs_VerifyObjects(yaffs_Device *dev)
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{
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yaffs_Object *obj;
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int i;
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struct ylist_head *lh;
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if (yaffs_SkipVerification(dev))
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return;
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/* Iterate through the objects in each hash entry */
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for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
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ylist_for_each(lh, &dev->objectBucket[i].list) {
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if (lh) {
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obj = ylist_entry(lh, yaffs_Object, hashLink);
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yaffs_VerifyObject(obj);
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}
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}
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}
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}
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void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
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{
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struct ylist_head *lh;
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yaffs_Object *listObj;
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int count = 0;
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if (!obj) {
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T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
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YBUG();
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return;
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}
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if (yaffs_SkipVerification(obj->myDev))
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return;
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if (!obj->parent) {
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T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
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YBUG();
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return;
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}
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if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
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T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
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YBUG();
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}
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/* Iterate through the objects in each hash entry */
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ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
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if (lh) {
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listObj = ylist_entry(lh, yaffs_Object, siblings);
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|
yaffs_VerifyObject(listObj);
|
|
if (obj == listObj)
|
|
count++;
|
|
}
|
|
}
|
|
|
|
if (count != 1) {
|
|
T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
|
|
YBUG();
|
|
}
|
|
}
|
|
|
|
void yaffs_VerifyDirectory(yaffs_Object *directory)
|
|
{
|
|
struct ylist_head *lh;
|
|
yaffs_Object *listObj;
|
|
|
|
if (!directory) {
|
|
YBUG();
|
|
return;
|
|
}
|
|
|
|
if (yaffs_SkipFullVerification(directory->myDev))
|
|
return;
|
|
|
|
if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
|
|
T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
|
|
YBUG();
|
|
}
|
|
|
|
/* Iterate through the objects in each hash entry */
|
|
|
|
ylist_for_each(lh, &directory->variant.directoryVariant.children) {
|
|
if (lh) {
|
|
listObj = ylist_entry(lh, yaffs_Object, siblings);
|
|
if (listObj->parent != directory) {
|
|
T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
|
|
YBUG();
|
|
}
|
|
yaffs_VerifyObjectInDirectory(listObj);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int yaffs_freeVerificationFailures;
|
|
|
|
void yaffs_VerifyFreeChunks(yaffs_Device *dev)
|
|
{
|
|
int counted;
|
|
int difference;
|
|
|
|
if (yaffs_SkipVerification(dev))
|
|
return;
|
|
|
|
counted = yaffs_CountFreeChunks(dev);
|
|
|
|
difference = dev->nFreeChunks - counted;
|
|
|
|
if (difference) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR("Freechunks verification failure %d %d %d" TENDSTR),
|
|
dev->nFreeChunks, counted, difference));
|
|
yaffs_freeVerificationFailures++;
|
|
}
|
|
}
|
|
|
|
int yaffs_VerifyFileSanity(yaffs_Object *in)
|
|
{
|
|
#if 0
|
|
int chunk;
|
|
int nChunks;
|
|
int fSize;
|
|
int failed = 0;
|
|
int objId;
|
|
yaffs_Tnode *tn;
|
|
yaffs_Tags localTags;
|
|
yaffs_Tags *tags = &localTags;
|
|
int theChunk;
|
|
int chunkDeleted;
|
|
|
|
if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
|
|
return YAFFS_FAIL;
|
|
|
|
objId = in->objectId;
|
|
fSize = in->variant.fileVariant.fileSize;
|
|
nChunks =
|
|
(fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
|
|
|
|
for (chunk = 1; chunk <= nChunks; chunk++) {
|
|
tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
|
|
chunk);
|
|
|
|
if (tn) {
|
|
|
|
theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
|
|
|
|
if (yaffs_CheckChunkBits
|
|
(dev, theChunk / dev->param.nChunksPerBlock,
|
|
theChunk % dev->param.nChunksPerBlock)) {
|
|
|
|
yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
|
|
tags,
|
|
&chunkDeleted);
|
|
if (yaffs_TagsMatch
|
|
(tags, in->objectId, chunk, chunkDeleted)) {
|
|
/* found it; */
|
|
|
|
}
|
|
} else {
|
|
|
|
failed = 1;
|
|
}
|
|
|
|
} else {
|
|
/* T(("No level 0 found for %d\n", chunk)); */
|
|
}
|
|
}
|
|
|
|
return failed ? YAFFS_FAIL : YAFFS_OK;
|
|
#else
|
|
in=in;
|
|
return YAFFS_OK;
|
|
#endif
|
|
}
|