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_skip_verification(yaffs_dev_t *dev)
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{
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dev=dev;
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return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
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}
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static int yaffs_skip_full_verification(yaffs_dev_t *dev)
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{
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dev=dev;
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return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL));
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}
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static int yaffs_skip_nand_verification(yaffs_dev_t *dev)
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{
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dev=dev;
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return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND));
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}
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static const char *block_stateName[] = {
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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_verify_blk(yaffs_dev_t *dev, yaffs_block_info_t *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_skip_verification(dev))
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return;
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/* Report illegal runtime states */
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if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES)
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T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->block_state));
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switch (bi->block_state) {
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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, block_stateName[bi->block_state]));
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}
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/* Check pages in use and soft deletions are legal */
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actuallyUsed = bi->pages_in_use - bi->soft_del_pages;
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if (bi->pages_in_use < 0 || bi->pages_in_use > dev->param.chunks_per_block ||
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bi->soft_del_pages < 0 || bi->soft_del_pages > dev->param.chunks_per_block ||
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actuallyUsed < 0 || actuallyUsed > dev->param.chunks_per_block)
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T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pages_in_used %d soft_del_pages %d"TENDSTR),
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n, bi->pages_in_use, bi->soft_del_pages));
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/* Check chunk bitmap legal */
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inUse = yaffs_count_chunk_bits(dev, n);
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if (inUse != bi->pages_in_use)
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T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pages_in_use %d counted chunk bits %d"TENDSTR),
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n, bi->pages_in_use, inUse));
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}
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void yaffs_verify_collected_blk(yaffs_dev_t *dev, yaffs_block_info_t *bi, int n)
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{
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yaffs_verify_blk(dev, bi, n);
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/* After collection the block should be in the erased state */
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if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING &&
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bi->block_state != 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->block_state));
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}
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}
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void yaffs_verify_blocks(yaffs_dev_t *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_skip_verification(dev))
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return;
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memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
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for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
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yaffs_block_info_t *bi = yaffs_get_block_info(dev, i);
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yaffs_verify_blk(dev, bi, i);
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if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES)
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nBlocksPerState[bi->block_state]++;
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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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block_stateName[i], nBlocksPerState[i]));
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if (dev->blocks_in_checkpt != 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->blocks_in_checkpt, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
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if (dev->n_erased_blocks != 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->n_erased_blocks, 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_verify_oh(yaffs_obj_t *obj, yaffs_obj_header *oh, yaffs_ext_tags *tags, int parentCheck)
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{
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if (obj && yaffs_skip_verification(obj->my_dev))
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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->obj_id, oh->type));
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if (tags->obj_id != obj->obj_id)
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d header mismatch obj_id %d"TENDSTR),
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tags->obj_id, obj->obj_id));
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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->obj_id > 1 && !obj->parent)
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d header mismatch parent_id %d obj->parent is NULL"TENDSTR),
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tags->obj_id, oh->parent_obj_id));
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if (parentCheck && obj->parent &&
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oh->parent_obj_id != obj->parent->obj_id &&
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(oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED ||
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obj->parent->obj_id != YAFFS_OBJECTID_DELETED))
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d header mismatch parent_id %d parent_obj_id %d"TENDSTR),
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tags->obj_id, oh->parent_obj_id, obj->parent->obj_id));
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if (tags->obj_id > 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->obj_id));
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if (tags->obj_id > 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->obj_id));
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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_verify_tnode_worker(yaffs_obj_t *obj, yaffs_tnode_t *tn,
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__u32 level, int chunk_offset)
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{
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int i;
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yaffs_dev_t *dev = obj->my_dev;
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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_verify_tnode_worker(obj,
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tn->internal[i],
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level - 1,
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(chunk_offset<<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_ext_tags tags;
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__u32 obj_id = obj->obj_id;
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chunk_offset <<= YAFFS_TNODES_LEVEL0_BITS;
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for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
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__u32 theChunk = yaffs_get_group_base(dev, tn, i);
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if (theChunk > 0) {
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/* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.obj_id,tags.chunk_id,theChunk)); */
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yaffs_rd_chunk_tags_nand(dev, theChunk, NULL, &tags);
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if (tags.obj_id != obj_id || tags.chunk_id != chunk_offset) {
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T(~0, (TSTR("Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
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obj_id, chunk_offset, theChunk,
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tags.obj_id, tags.chunk_id));
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}
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}
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chunk_offset++;
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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_verify_file(yaffs_obj_t *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_dev_t *dev;
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yaffs_ext_tags tags;
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yaffs_tnode_t *tn;
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__u32 obj_id;
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if (!obj)
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return;
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if (yaffs_skip_verification(obj->my_dev))
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return;
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dev = obj->my_dev;
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obj_id = obj->obj_id;
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/* Check file size is consistent with tnode depth */
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lastChunk = obj->variant.file_variant.file_size / dev->data_bytes_per_chunk + 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.file_variant.top_level;
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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_skip_nand_verification(dev))
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return;
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for (i = 1; i <= lastChunk; i++) {
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tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i);
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if (tn) {
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__u32 theChunk = yaffs_get_group_base(dev, tn, i);
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if (theChunk > 0) {
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/* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),obj_id,i,theChunk)); */
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yaffs_rd_chunk_tags_nand(dev, theChunk, NULL, &tags);
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if (tags.obj_id != obj_id || tags.chunk_id != i) {
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T(~0, (TSTR("Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
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obj_id, i, theChunk,
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tags.obj_id, tags.chunk_id));
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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_verify_link(yaffs_obj_t *obj)
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{
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if (obj && yaffs_skip_verification(obj->my_dev))
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return;
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/* Verify sane equivalent object */
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}
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void yaffs_verify_symlink(yaffs_obj_t *obj)
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{
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if (obj && yaffs_skip_verification(obj->my_dev))
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return;
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/* Verify symlink string */
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}
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void yaffs_verify_special(yaffs_obj_t *obj)
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{
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if (obj && yaffs_skip_verification(obj->my_dev))
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return;
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}
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void yaffs_verify_obj(yaffs_obj_t *obj)
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{
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yaffs_dev_t *dev;
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__u32 chunkMin;
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__u32 chunkMax;
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__u32 chunk_idOk;
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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->being_created)
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return;
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dev = obj->my_dev;
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if (yaffs_skip_verification(dev))
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return;
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/* Check sane object header chunk */
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chunkMin = dev->internal_start_block * dev->param.chunks_per_block;
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chunkMax = (dev->internal_end_block+1) * dev->param.chunks_per_block - 1;
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chunkInRange = (((unsigned)(obj->hdr_chunk)) >= chunkMin && ((unsigned)(obj->hdr_chunk)) <= chunkMax);
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chunk_idOk = chunkInRange || (obj->hdr_chunk == 0);
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chunkValid = chunkInRange &&
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yaffs_check_chunk_bit(dev,
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obj->hdr_chunk / dev->param.chunks_per_block,
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obj->hdr_chunk % dev->param.chunks_per_block);
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chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
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if (!obj->fake &&
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(!chunk_idOk || chunkShouldNotBeDeleted)) {
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T(YAFFS_TRACE_VERIFY,
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(TSTR("Obj %d has chunk_id %d %s %s"TENDSTR),
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obj->obj_id, obj->hdr_chunk,
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chunk_idOk ? "" : ",out of range",
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chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
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}
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if (chunkValid && !yaffs_skip_nand_verification(dev)) {
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yaffs_ext_tags tags;
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yaffs_obj_header *oh;
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__u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__);
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oh = (yaffs_obj_header *)buffer;
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yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer,
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&tags);
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yaffs_verify_oh(obj, oh, &tags, 1);
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yaffs_release_temp_buffer(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->my_dev != 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->obj_id, obj->parent));
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}
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/* Verify parent is a directory */
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if (obj->parent && obj->parent->variant_type != 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->obj_id, obj->parent->variant_type));
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}
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switch (obj->variant_type) {
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case YAFFS_OBJECT_TYPE_FILE:
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yaffs_verify_file(obj);
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break;
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case YAFFS_OBJECT_TYPE_SYMLINK:
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yaffs_verify_symlink(obj);
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break;
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case YAFFS_OBJECT_TYPE_DIRECTORY:
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yaffs_verify_dir(obj);
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break;
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case YAFFS_OBJECT_TYPE_HARDLINK:
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yaffs_verify_link(obj);
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break;
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case YAFFS_OBJECT_TYPE_SPECIAL:
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yaffs_verify_special(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->obj_id, obj->variant_type));
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break;
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}
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}
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void yaffs_verify_objects(yaffs_dev_t *dev)
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{
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yaffs_obj_t *obj;
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int i;
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struct ylist_head *lh;
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if (yaffs_skip_verification(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->obj_bucket[i].list) {
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if (lh) {
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obj = ylist_entry(lh, yaffs_obj_t, hash_link);
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yaffs_verify_obj(obj);
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}
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}
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}
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}
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void yaffs_verify_obj_in_dir(yaffs_obj_t *obj)
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{
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struct ylist_head *lh;
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yaffs_obj_t *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_skip_verification(obj->my_dev))
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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)));
|
|
YBUG();
|
|
return;
|
|
}
|
|
|
|
if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
|
|
T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
|
|
YBUG();
|
|
}
|
|
|
|
/* Iterate through the objects in each hash entry */
|
|
|
|
ylist_for_each(lh, &obj->parent->variant.dir_variant.children) {
|
|
if (lh) {
|
|
listObj = ylist_entry(lh, yaffs_obj_t, siblings);
|
|
yaffs_verify_obj(listObj);
|
|
if (obj == listObj)
|
|
count++;
|
|
}
|
|
}
|
|
|
|
if (count != 1) {
|
|
T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
|
|
YBUG();
|
|
}
|
|
}
|
|
|
|
void yaffs_verify_dir(yaffs_obj_t *directory)
|
|
{
|
|
struct ylist_head *lh;
|
|
yaffs_obj_t *listObj;
|
|
|
|
if (!directory) {
|
|
YBUG();
|
|
return;
|
|
}
|
|
|
|
if (yaffs_skip_full_verification(directory->my_dev))
|
|
return;
|
|
|
|
if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
|
|
T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variant_type));
|
|
YBUG();
|
|
}
|
|
|
|
/* Iterate through the objects in each hash entry */
|
|
|
|
ylist_for_each(lh, &directory->variant.dir_variant.children) {
|
|
if (lh) {
|
|
listObj = ylist_entry(lh, yaffs_obj_t, siblings);
|
|
if (listObj->parent != directory) {
|
|
T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
|
|
YBUG();
|
|
}
|
|
yaffs_verify_obj_in_dir(listObj);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int yaffs_free_verification_failures;
|
|
|
|
void yaffs_verify_free_chunks(yaffs_dev_t *dev)
|
|
{
|
|
int counted;
|
|
int difference;
|
|
|
|
if (yaffs_skip_verification(dev))
|
|
return;
|
|
|
|
counted = yaffs_count_free_chunks(dev);
|
|
|
|
difference = dev->n_free_chunks - counted;
|
|
|
|
if (difference) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR("Freechunks verification failure %d %d %d" TENDSTR),
|
|
dev->n_free_chunks, counted, difference));
|
|
yaffs_free_verification_failures++;
|
|
}
|
|
}
|
|
|
|
int yaffs_verify_file_sane(yaffs_obj_t *in)
|
|
{
|
|
#if 0
|
|
int chunk;
|
|
int n_chunks;
|
|
int fSize;
|
|
int failed = 0;
|
|
int obj_id;
|
|
yaffs_tnode_t *tn;
|
|
yaffs_tags_t localTags;
|
|
yaffs_tags_t *tags = &localTags;
|
|
int theChunk;
|
|
int is_deleted;
|
|
|
|
if (in->variant_type != YAFFS_OBJECT_TYPE_FILE)
|
|
return YAFFS_FAIL;
|
|
|
|
obj_id = in->obj_id;
|
|
fSize = in->variant.file_variant.file_size;
|
|
n_chunks =
|
|
(fSize + in->my_dev->data_bytes_per_chunk - 1) / in->my_dev->data_bytes_per_chunk;
|
|
|
|
for (chunk = 1; chunk <= n_chunks; chunk++) {
|
|
tn = yaffs_find_tnode_0(in->my_dev, &in->variant.file_variant,
|
|
chunk);
|
|
|
|
if (tn) {
|
|
|
|
theChunk = yaffs_get_group_base(dev, tn, chunk);
|
|
|
|
if (yaffs_check_chunk_bits
|
|
(dev, theChunk / dev->param.chunks_per_block,
|
|
theChunk % dev->param.chunks_per_block)) {
|
|
|
|
yaffs_rd_chunk_tags_nand(in->my_dev, theChunk,
|
|
tags,
|
|
&is_deleted);
|
|
if (yaffs_tags_match
|
|
(tags, in->obj_id, chunk, is_deleted)) {
|
|
/* 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
|
|
}
|