--- /dev/null
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+
+#include "yaffs_verify.h"
+#include "yaffs_trace.h"
+#include "yaffs_bitmap.h"
+#include "yaffs_getblockinfo.h"
+#include "yaffs_nand.h"
+
+int yaffs_skip_verification(yaffs_dev_t *dev)
+{
+ dev=dev;
+ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
+}
+
+static int yaffs_skip_full_verification(yaffs_dev_t *dev)
+{
+ dev=dev;
+ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL));
+}
+
+static int yaffs_skip_nand_verification(yaffs_dev_t *dev)
+{
+ dev=dev;
+ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND));
+}
+
+
+static const char *block_stateName[] = {
+"Unknown",
+"Needs scanning",
+"Scanning",
+"Empty",
+"Allocating",
+"Full",
+"Dirty",
+"Checkpoint",
+"Collecting",
+"Dead"
+};
+
+
+void yaffs_verify_blk(yaffs_dev_t *dev, yaffs_block_info_t *bi, int n)
+{
+ int actuallyUsed;
+ int inUse;
+
+ if (yaffs_skip_verification(dev))
+ return;
+
+ /* Report illegal runtime states */
+ if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES)
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->block_state));
+
+ switch (bi->block_state) {
+ case YAFFS_BLOCK_STATE_UNKNOWN:
+ case YAFFS_BLOCK_STATE_SCANNING:
+ case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
+ n, block_stateName[bi->block_state]));
+ }
+
+ /* Check pages in use and soft deletions are legal */
+
+ actuallyUsed = bi->pages_in_use - bi->soft_del_pages;
+
+ if (bi->pages_in_use < 0 || bi->pages_in_use > dev->param.chunks_per_block ||
+ bi->soft_del_pages < 0 || bi->soft_del_pages > dev->param.chunks_per_block ||
+ actuallyUsed < 0 || actuallyUsed > dev->param.chunks_per_block)
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pages_in_used %d soft_del_pages %d"TENDSTR),
+ n, bi->pages_in_use, bi->soft_del_pages));
+
+
+ /* Check chunk bitmap legal */
+ inUse = yaffs_count_chunk_bits(dev, n);
+ if (inUse != bi->pages_in_use)
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pages_in_use %d counted chunk bits %d"TENDSTR),
+ n, bi->pages_in_use, inUse));
+
+}
+
+
+
+void yaffs_verify_collected_blk(yaffs_dev_t *dev, yaffs_block_info_t *bi, int n)
+{
+ yaffs_verify_blk(dev, bi, n);
+
+ /* After collection the block should be in the erased state */
+
+ if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING &&
+ bi->block_state != YAFFS_BLOCK_STATE_EMPTY) {
+ T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
+ n, bi->block_state));
+ }
+}
+
+void yaffs_verify_blocks(yaffs_dev_t *dev)
+{
+ int i;
+ int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
+ int nIllegalBlockStates = 0;
+
+ if (yaffs_skip_verification(dev))
+ return;
+
+ memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
+
+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
+ yaffs_block_info_t *bi = yaffs_get_block_info(dev, i);
+ yaffs_verify_blk(dev, bi, i);
+
+ if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES)
+ nBlocksPerState[bi->block_state]++;
+ else
+ nIllegalBlockStates++;
+ }
+
+ T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
+
+ T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
+ if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
+ T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
+
+ for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("%s %d blocks"TENDSTR),
+ block_stateName[i], nBlocksPerState[i]));
+
+ if (dev->blocks_in_checkpt != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
+ dev->blocks_in_checkpt, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
+
+ if (dev->n_erased_blocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
+ dev->n_erased_blocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
+
+ if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
+ nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
+
+ T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
+
+}
+
+/*
+ * Verify the object header. oh must be valid, but obj and tags may be NULL in which
+ * case those tests will not be performed.
+ */
+void yaffs_verify_oh(yaffs_obj_t *obj, yaffs_obj_header *oh, yaffs_ext_tags *tags, int parentCheck)
+{
+ if (obj && yaffs_skip_verification(obj->my_dev))
+ return;
+
+ if (!(tags && obj && oh)) {
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR),
+ tags, obj, oh));
+ return;
+ }
+
+ if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
+ oh->type > YAFFS_OBJECT_TYPE_MAX)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
+ tags->obj_id, oh->type));
+
+ if (tags->obj_id != obj->obj_id)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header mismatch obj_id %d"TENDSTR),
+ tags->obj_id, obj->obj_id));
+
+
+ /*
+ * Check that the object's parent ids match if parentCheck requested.
+ *
+ * Tests do not apply to the root object.
+ */
+
+ if (parentCheck && tags->obj_id > 1 && !obj->parent)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header mismatch parent_id %d obj->parent is NULL"TENDSTR),
+ tags->obj_id, oh->parent_obj_id));
+
+ if (parentCheck && obj->parent &&
+ oh->parent_obj_id != obj->parent->obj_id &&
+ (oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED ||
+ obj->parent->obj_id != YAFFS_OBJECTID_DELETED))
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header mismatch parent_id %d parent_obj_id %d"TENDSTR),
+ tags->obj_id, oh->parent_obj_id, obj->parent->obj_id));
+
+ if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header name is NULL"TENDSTR),
+ obj->obj_id));
+
+ if (tags->obj_id > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header name is 0xFF"TENDSTR),
+ obj->obj_id));
+}
+
+
+#if 0
+/* Not being used, but don't want to throw away yet */
+int yaffs_verify_tnode_worker(yaffs_obj_t *obj, yaffs_tnode_t *tn,
+ __u32 level, int chunk_offset)
+{
+ int i;
+ yaffs_dev_t *dev = obj->my_dev;
+ int ok = 1;
+
+ if (tn) {
+ if (level > 0) {
+
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
+ if (tn->internal[i]) {
+ ok = yaffs_verify_tnode_worker(obj,
+ tn->internal[i],
+ level - 1,
+ (chunk_offset<<YAFFS_TNODES_INTERNAL_BITS) + i);
+ }
+ }
+ } else if (level == 0) {
+ yaffs_ext_tags tags;
+ __u32 obj_id = obj->obj_id;
+
+ chunk_offset <<= YAFFS_TNODES_LEVEL0_BITS;
+
+ for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
+ __u32 theChunk = yaffs_get_group_base(dev, tn, i);
+
+ if (theChunk > 0) {
+ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.obj_id,tags.chunk_id,theChunk)); */
+ yaffs_rd_chunk_tags_nand(dev, theChunk, NULL, &tags);
+ if (tags.obj_id != obj_id || tags.chunk_id != chunk_offset) {
+ T(~0, (TSTR("Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
+ obj_id, chunk_offset, theChunk,
+ tags.obj_id, tags.chunk_id));
+ }
+ }
+ chunk_offset++;
+ }
+ }
+ }
+
+ return ok;
+
+}
+
+#endif
+
+void yaffs_verify_file(yaffs_obj_t *obj)
+{
+ int requiredTallness;
+ int actualTallness;
+ __u32 lastChunk;
+ __u32 x;
+ __u32 i;
+ yaffs_dev_t *dev;
+ yaffs_ext_tags tags;
+ yaffs_tnode_t *tn;
+ __u32 obj_id;
+
+ if (!obj)
+ return;
+
+ if (yaffs_skip_verification(obj->my_dev))
+ return;
+
+ dev = obj->my_dev;
+ obj_id = obj->obj_id;
+
+ /* Check file size is consistent with tnode depth */
+ lastChunk = obj->variant.file_variant.file_size / dev->data_bytes_per_chunk + 1;
+ x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
+ requiredTallness = 0;
+ while (x > 0) {
+ x >>= YAFFS_TNODES_INTERNAL_BITS;
+ requiredTallness++;
+ }
+
+ actualTallness = obj->variant.file_variant.top_level;
+
+ /* Check that the chunks in the tnode tree are all correct.
+ * We do this by scanning through the tnode tree and
+ * checking the tags for every chunk match.
+ */
+
+ if (yaffs_skip_nand_verification(dev))
+ return;
+
+ for (i = 1; i <= lastChunk; i++) {
+ tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i);
+
+ if (tn) {
+ __u32 theChunk = yaffs_get_group_base(dev, tn, i);
+ if (theChunk > 0) {
+ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),obj_id,i,theChunk)); */
+ yaffs_rd_chunk_tags_nand(dev, theChunk, NULL, &tags);
+ if (tags.obj_id != obj_id || tags.chunk_id != i) {
+ T(~0, (TSTR("Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
+ obj_id, i, theChunk,
+ tags.obj_id, tags.chunk_id));
+ }
+ }
+ }
+ }
+}
+
+
+void yaffs_verify_link(yaffs_obj_t *obj)
+{
+ if (obj && yaffs_skip_verification(obj->my_dev))
+ return;
+
+ /* Verify sane equivalent object */
+}
+
+void yaffs_verify_symlink(yaffs_obj_t *obj)
+{
+ if (obj && yaffs_skip_verification(obj->my_dev))
+ return;
+
+ /* Verify symlink string */
+}
+
+void yaffs_verify_special(yaffs_obj_t *obj)
+{
+ if (obj && yaffs_skip_verification(obj->my_dev))
+ return;
+}
+
+void yaffs_verify_obj(yaffs_obj_t *obj)
+{
+ yaffs_dev_t *dev;
+
+ __u32 chunkMin;
+ __u32 chunkMax;
+
+ __u32 chunk_idOk;
+ __u32 chunkInRange;
+ __u32 chunkShouldNotBeDeleted;
+ __u32 chunkValid;
+
+ if (!obj)
+ return;
+
+ if (obj->being_created)
+ return;
+
+ dev = obj->my_dev;
+
+ if (yaffs_skip_verification(dev))
+ return;
+
+ /* Check sane object header chunk */
+
+ chunkMin = dev->internal_start_block * dev->param.chunks_per_block;
+ chunkMax = (dev->internal_end_block+1) * dev->param.chunks_per_block - 1;
+
+ chunkInRange = (((unsigned)(obj->hdr_chunk)) >= chunkMin && ((unsigned)(obj->hdr_chunk)) <= chunkMax);
+ chunk_idOk = chunkInRange || (obj->hdr_chunk == 0);
+ chunkValid = chunkInRange &&
+ yaffs_check_chunk_bit(dev,
+ obj->hdr_chunk / dev->param.chunks_per_block,
+ obj->hdr_chunk % dev->param.chunks_per_block);
+ chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
+
+ if (!obj->fake &&
+ (!chunk_idOk || chunkShouldNotBeDeleted)) {
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d has chunk_id %d %s %s"TENDSTR),
+ obj->obj_id, obj->hdr_chunk,
+ chunk_idOk ? "" : ",out of range",
+ chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
+ }
+
+ if (chunkValid && !yaffs_skip_nand_verification(dev)) {
+ yaffs_ext_tags tags;
+ yaffs_obj_header *oh;
+ __u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__);
+
+ oh = (yaffs_obj_header *)buffer;
+
+ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer,
+ &tags);
+
+ yaffs_verify_oh(obj, oh, &tags, 1);
+
+ yaffs_release_temp_buffer(dev, buffer, __LINE__);
+ }
+
+ /* Verify it has a parent */
+ if (obj && !obj->fake &&
+ (!obj->parent || obj->parent->my_dev != dev)) {
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
+ obj->obj_id, obj->parent));
+ }
+
+ /* Verify parent is a directory */
+ if (obj->parent && obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
+ obj->obj_id, obj->parent->variant_type));
+ }
+
+ switch (obj->variant_type) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ yaffs_verify_file(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ yaffs_verify_symlink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ yaffs_verify_dir(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ yaffs_verify_link(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ yaffs_verify_special(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ default:
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d has illegaltype %d"TENDSTR),
+ obj->obj_id, obj->variant_type));
+ break;
+ }
+}
+
+void yaffs_verify_objects(yaffs_dev_t *dev)
+{
+ yaffs_obj_t *obj;
+ int i;
+ struct ylist_head *lh;
+
+ if (yaffs_skip_verification(dev))
+ return;
+
+ /* Iterate through the objects in each hash entry */
+
+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+ ylist_for_each(lh, &dev->obj_bucket[i].list) {
+ if (lh) {
+ obj = ylist_entry(lh, yaffs_obj_t, hash_link);
+ yaffs_verify_obj(obj);
+ }
+ }
+ }
+}
+
+
+void yaffs_verify_obj_in_dir(yaffs_obj_t *obj)
+{
+ struct ylist_head *lh;
+ yaffs_obj_t *listObj;
+
+ int count = 0;
+
+ if (!obj) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
+ YBUG();
+ return;
+ }
+
+ if (yaffs_skip_verification(obj->my_dev))
+ return;
+
+ if (!obj->parent) {
+ 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
+}
projects / 15.05 / openwrt.git / blobdiff