lkml.org 
[lkml]   [2011]   [Jan]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 06/10] Add yaffs2 file system: Tracing and verification code
    Date
    Signed-off-by: Charles Manning <cdhmanning@gmail.com>
    ---
    fs/yaffs2/yaffs_tagsvalidity.c | 26 ++
    fs/yaffs2/yaffs_tagsvalidity.h | 23 ++
    fs/yaffs2/yaffs_trace.h | 57 +++++
    fs/yaffs2/yaffs_verify.c | 524 ++++++++++++++++++++++++++++++++++++++++
    fs/yaffs2/yaffs_verify.h | 43 ++++
    5 files changed, 673 insertions(+), 0 deletions(-)
    create mode 100644 fs/yaffs2/yaffs_tagsvalidity.c
    create mode 100644 fs/yaffs2/yaffs_tagsvalidity.h
    create mode 100644 fs/yaffs2/yaffs_trace.h
    create mode 100644 fs/yaffs2/yaffs_verify.c
    create mode 100644 fs/yaffs2/yaffs_verify.h

    diff --git a/fs/yaffs2/yaffs_tagsvalidity.c b/fs/yaffs2/yaffs_tagsvalidity.c
    new file mode 100644
    index 0000000..582f36a
    --- /dev/null
    +++ b/fs/yaffs2/yaffs_tagsvalidity.c
    @@ -0,0 +1,26 @@
    +/*
    + * 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_tagsvalidity.h"
    +
    +void yaffs_init_tags(struct yaffs_ext_tags *tags)
    +{
    + memset(tags, 0, sizeof(struct yaffs_ext_tags));
    + tags->validity0 = 0xAAAAAAAA;
    + tags->validity1 = 0x55555555;
    +}
    +
    +int yaffs_validate_tags(struct yaffs_ext_tags *tags)
    +{
    + return (tags->validity0 == 0xAAAAAAAA && tags->validity1 == 0x55555555);
    +}
    diff --git a/fs/yaffs2/yaffs_tagsvalidity.h b/fs/yaffs2/yaffs_tagsvalidity.h
    new file mode 100644
    index 0000000..36a021f
    --- /dev/null
    +++ b/fs/yaffs2/yaffs_tagsvalidity.h
    @@ -0,0 +1,23 @@
    +/*
    + * 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 Lesser General Public License version 2.1 as
    + * published by the Free Software Foundation.
    + *
    + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
    + */
    +
    +#ifndef __YAFFS_TAGS_VALIDITY_H__
    +#define __YAFFS_TAGS_VALIDITY_H__
    +
    +#include "yaffs_guts.h"
    +
    +void yaffs_init_tags(struct yaffs_ext_tags *tags);
    +int yaffs_validate_tags(struct yaffs_ext_tags *tags);
    +#endif
    diff --git a/fs/yaffs2/yaffs_trace.h b/fs/yaffs2/yaffs_trace.h
    new file mode 100644
    index 0000000..6273dbf
    --- /dev/null
    +++ b/fs/yaffs2/yaffs_trace.h
    @@ -0,0 +1,57 @@
    +/*
    + * 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 Lesser General Public License version 2.1 as
    + * published by the Free Software Foundation.
    + *
    + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
    + */
    +
    +#ifndef __YTRACE_H__
    +#define __YTRACE_H__
    +
    +extern unsigned int yaffs_trace_mask;
    +extern unsigned int yaffs_wr_attempts;
    +
    +/*
    + * Tracing flags.
    + * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
    + */
    +
    +#define YAFFS_TRACE_OS 0x00000002
    +#define YAFFS_TRACE_ALLOCATE 0x00000004
    +#define YAFFS_TRACE_SCAN 0x00000008
    +#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
    +#define YAFFS_TRACE_ERASE 0x00000020
    +#define YAFFS_TRACE_GC 0x00000040
    +#define YAFFS_TRACE_WRITE 0x00000080
    +#define YAFFS_TRACE_TRACING 0x00000100
    +#define YAFFS_TRACE_DELETION 0x00000200
    +#define YAFFS_TRACE_BUFFERS 0x00000400
    +#define YAFFS_TRACE_NANDACCESS 0x00000800
    +#define YAFFS_TRACE_GC_DETAIL 0x00001000
    +#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
    +#define YAFFS_TRACE_MTD 0x00004000
    +#define YAFFS_TRACE_CHECKPOINT 0x00008000
    +
    +#define YAFFS_TRACE_VERIFY 0x00010000
    +#define YAFFS_TRACE_VERIFY_NAND 0x00020000
    +#define YAFFS_TRACE_VERIFY_FULL 0x00040000
    +#define YAFFS_TRACE_VERIFY_ALL 0x000F0000
    +
    +#define YAFFS_TRACE_SYNC 0x00100000
    +#define YAFFS_TRACE_BACKGROUND 0x00200000
    +#define YAFFS_TRACE_LOCK 0x00400000
    +#define YAFFS_TRACE_MOUNT 0x00800000
    +
    +#define YAFFS_TRACE_ERROR 0x40000000
    +#define YAFFS_TRACE_BUG 0x80000000
    +#define YAFFS_TRACE_ALWAYS 0xF0000000
    +
    +#endif
    diff --git a/fs/yaffs2/yaffs_verify.c b/fs/yaffs2/yaffs_verify.c
    new file mode 100644
    index 0000000..1a5ed9a
    --- /dev/null
    +++ b/fs/yaffs2/yaffs_verify.c
    @@ -0,0 +1,524 @@
    +/*
    + * 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(struct yaffs_dev *dev)
    +{
    + dev = dev;
    + return !(yaffs_trace_mask &
    + (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
    +}
    +
    +static int yaffs_skip_full_verification(struct yaffs_dev *dev)
    +{
    + dev = dev;
    + return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL));
    +}
    +
    +static int yaffs_skip_nand_verification(struct yaffs_dev *dev)
    +{
    + dev = dev;
    + return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND));
    +}
    +
    +static const char * const block_state_name[] = {
    + "Unknown",
    + "Needs scanning",
    + "Scanning",
    + "Empty",
    + "Allocating",
    + "Full",
    + "Dirty",
    + "Checkpoint",
    + "Collecting",
    + "Dead"
    +};
    +
    +void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, int n)
    +{
    + int actually_used;
    + int in_use;
    +
    + if (yaffs_skip_verification(dev))
    + return;
    +
    + /* Report illegal runtime states */
    + if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES)
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Block %d has undefined state %d",
    + n, bi->block_state);
    +
    + switch (bi->block_state) {
    + case YAFFS_BLOCK_STATE_UNKNOWN:
    + case YAFFS_BLOCK_STATE_SCANNING:
    + case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Block %d has bad run-state %s",
    + n, block_state_name[bi->block_state]);
    + }
    +
    + /* Check pages in use and soft deletions are legal */
    +
    + actually_used = 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
    + || actually_used < 0 || actually_used > dev->param.chunks_per_block)
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Block %d has illegal values pages_in_used %d soft_del_pages %d",
    + n, bi->pages_in_use, bi->soft_del_pages);
    +
    + /* Check chunk bitmap legal */
    + in_use = yaffs_count_chunk_bits(dev, n);
    + if (in_use != bi->pages_in_use)
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Block %d has inconsistent values pages_in_use %d counted chunk bits %d",
    + n, bi->pages_in_use, in_use);
    +}
    +
    +void yaffs_verify_collected_blk(struct yaffs_dev *dev,
    + struct yaffs_block_info *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) {
    + yaffs_trace(YAFFS_TRACE_ERROR,
    + "Block %d is in state %d after gc, should be erased",
    + n, bi->block_state);
    + }
    +}
    +
    +void yaffs_verify_blocks(struct yaffs_dev *dev)
    +{
    + int i;
    + int state_count[YAFFS_NUMBER_OF_BLOCK_STATES];
    + int illegal_states = 0;
    +
    + if (yaffs_skip_verification(dev))
    + return;
    +
    + memset(state_count, 0, sizeof(state_count));
    +
    + for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
    + struct yaffs_block_info *bi = yaffs_get_block_info(dev, i);
    + yaffs_verify_blk(dev, bi, i);
    +
    + if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES)
    + state_count[bi->block_state]++;
    + else
    + illegal_states++;
    + }
    +
    + yaffs_trace(YAFFS_TRACE_VERIFY, "Block summary");
    +
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "%d blocks have illegal states",
    + illegal_states);
    + if (state_count[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Too many allocating blocks");
    +
    + for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "%s %d blocks",
    + block_state_name[i], state_count[i]);
    +
    + if (dev->blocks_in_checkpt != state_count[YAFFS_BLOCK_STATE_CHECKPOINT])
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Checkpoint block count wrong dev %d count %d",
    + dev->blocks_in_checkpt,
    + state_count[YAFFS_BLOCK_STATE_CHECKPOINT]);
    +
    + if (dev->n_erased_blocks != state_count[YAFFS_BLOCK_STATE_EMPTY])
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Erased block count wrong dev %d count %d",
    + dev->n_erased_blocks,
    + state_count[YAFFS_BLOCK_STATE_EMPTY]);
    +
    + if (state_count[YAFFS_BLOCK_STATE_COLLECTING] > 1)
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Too many collecting blocks %d (max is 1)",
    + state_count[YAFFS_BLOCK_STATE_COLLECTING]);
    +}
    +
    +/*
    + * 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(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh,
    + struct yaffs_ext_tags *tags, int parent_check)
    +{
    + if (obj && yaffs_skip_verification(obj->my_dev))
    + return;
    +
    + if (!(tags && obj && oh)) {
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Verifying object header tags %p obj %p oh %p",
    + tags, obj, oh);
    + return;
    + }
    +
    + if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
    + oh->type > YAFFS_OBJECT_TYPE_MAX)
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Obj %d header type is illegal value 0x%x",
    + tags->obj_id, oh->type);
    +
    + if (tags->obj_id != obj->obj_id)
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Obj %d header mismatch obj_id %d",
    + tags->obj_id, obj->obj_id);
    +
    + /*
    + * Check that the object's parent ids match if parent_check requested.
    + *
    + * Tests do not apply to the root object.
    + */
    +
    + if (parent_check && tags->obj_id > 1 && !obj->parent)
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Obj %d header mismatch parent_id %d obj->parent is NULL",
    + tags->obj_id, oh->parent_obj_id);
    +
    + if (parent_check && obj->parent &&
    + oh->parent_obj_id != obj->parent->obj_id &&
    + (oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED ||
    + obj->parent->obj_id != YAFFS_OBJECTID_DELETED))
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Obj %d header mismatch parent_id %d parent_obj_id %d",
    + tags->obj_id, oh->parent_obj_id,
    + obj->parent->obj_id);
    +
    + if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Obj %d header name is NULL",
    + obj->obj_id);
    +
    + if (tags->obj_id > 1 && ((u8) (oh->name[0])) == 0xff) /* Junk name */
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Obj %d header name is 0xFF",
    + obj->obj_id);
    +}
    +
    +void yaffs_verify_file(struct yaffs_obj *obj)
    +{
    + int required_depth;
    + int actual_depth;
    + u32 last_chunk;
    + u32 x;
    + u32 i;
    + struct yaffs_dev *dev;
    + struct yaffs_ext_tags tags;
    + struct yaffs_tnode *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 */
    + last_chunk =
    + obj->variant.file_variant.file_size / dev->data_bytes_per_chunk + 1;
    + x = last_chunk >> YAFFS_TNODES_LEVEL0_BITS;
    + required_depth = 0;
    + while (x > 0) {
    + x >>= YAFFS_TNODES_INTERNAL_BITS;
    + required_depth++;
    + }
    +
    + actual_depth = 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 <= last_chunk; i++) {
    + tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i);
    +
    + if (tn) {
    + u32 the_chunk = yaffs_get_group_base(dev, tn, i);
    + if (the_chunk > 0) {
    + yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL,
    + &tags);
    + if (tags.obj_id != obj_id || tags.chunk_id != i)
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)",
    + obj_id, i, the_chunk,
    + tags.obj_id, tags.chunk_id);
    + }
    + }
    + }
    +}
    +
    +void yaffs_verify_link(struct yaffs_obj *obj)
    +{
    + if (obj && yaffs_skip_verification(obj->my_dev))
    + return;
    +
    + /* Verify sane equivalent object */
    +}
    +
    +void yaffs_verify_symlink(struct yaffs_obj *obj)
    +{
    + if (obj && yaffs_skip_verification(obj->my_dev))
    + return;
    +
    + /* Verify symlink string */
    +}
    +
    +void yaffs_verify_special(struct yaffs_obj *obj)
    +{
    + if (obj && yaffs_skip_verification(obj->my_dev))
    + return;
    +}
    +
    +void yaffs_verify_obj(struct yaffs_obj *obj)
    +{
    + struct yaffs_dev *dev;
    + u32 chunk_min;
    + u32 chunk_max;
    + u32 chunk_id_ok;
    + u32 chunk_in_range;
    + u32 chunk_wrongly_deleted;
    + u32 chunk_valid;
    +
    + if (!obj)
    + return;
    +
    + if (obj->being_created)
    + return;
    +
    + dev = obj->my_dev;
    +
    + if (yaffs_skip_verification(dev))
    + return;
    +
    + /* Check sane object header chunk */
    +
    + chunk_min = dev->internal_start_block * dev->param.chunks_per_block;
    + chunk_max =
    + (dev->internal_end_block + 1) * dev->param.chunks_per_block - 1;
    +
    + chunk_in_range = (((unsigned)(obj->hdr_chunk)) >= chunk_min &&
    + ((unsigned)(obj->hdr_chunk)) <= chunk_max);
    + chunk_id_ok = chunk_in_range || (obj->hdr_chunk == 0);
    + chunk_valid = chunk_in_range &&
    + yaffs_check_chunk_bit(dev,
    + obj->hdr_chunk / dev->param.chunks_per_block,
    + obj->hdr_chunk % dev->param.chunks_per_block);
    + chunk_wrongly_deleted = chunk_in_range && !chunk_valid;
    +
    + if (!obj->fake && (!chunk_id_ok || chunk_wrongly_deleted))
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Obj %d has chunk_id %d %s %s",
    + obj->obj_id, obj->hdr_chunk,
    + chunk_id_ok ? "" : ",out of range",
    + chunk_wrongly_deleted ? ",marked as deleted" : "");
    +
    + if (chunk_valid && !yaffs_skip_nand_verification(dev)) {
    + struct yaffs_ext_tags tags;
    + struct yaffs_obj_hdr *oh;
    + u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__);
    +
    + oh = (struct yaffs_obj_hdr *)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)) {
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Obj %d has parent pointer %p which does not look like an object",
    + obj->obj_id, obj->parent);
    + }
    +
    + /* Verify parent is a directory */
    + if (obj->parent
    + && obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Obj %d's parent is not a directory (type %d)",
    + 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:
    + yaffs_trace(YAFFS_TRACE_VERIFY,
    + "Obj %d has illegaltype %d",
    + obj->obj_id, obj->variant_type);
    + break;
    + }
    +}
    +
    +void yaffs_verify_objects(struct yaffs_dev *dev)
    +{
    + struct yaffs_obj *obj;
    + int i;
    + struct list_head *lh;
    +
    + if (yaffs_skip_verification(dev))
    + return;
    +
    + /* Iterate through the objects in each hash entry */
    +
    + for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
    + list_for_each(lh, &dev->obj_bucket[i].list) {
    + obj = list_entry(lh, struct yaffs_obj, hash_link);
    + yaffs_verify_obj(obj);
    + }
    + }
    +}
    +
    +void yaffs_verify_obj_in_dir(struct yaffs_obj *obj)
    +{
    + struct list_head *lh;
    + struct yaffs_obj *list_obj;
    + int count = 0;
    +
    + if (!obj) {
    + yaffs_trace(YAFFS_TRACE_ALWAYS, "No object to verify");
    + YBUG();
    + return;
    + }
    +
    + if (yaffs_skip_verification(obj->my_dev))
    + return;
    +
    + if (!obj->parent) {
    + yaffs_trace(YAFFS_TRACE_ALWAYS, "Object does not have parent");
    + YBUG();
    + return;
    + }
    +
    + if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
    + yaffs_trace(YAFFS_TRACE_ALWAYS, "Parent is not directory");
    + YBUG();
    + }
    +
    + /* Iterate through the objects in each hash entry */
    +
    + list_for_each(lh, &obj->parent->variant.dir_variant.children) {
    + list_obj = list_entry(lh, struct yaffs_obj, siblings);
    + yaffs_verify_obj(list_obj);
    + if (obj == list_obj)
    + count++;
    + }
    +
    + if (count != 1) {
    + yaffs_trace(YAFFS_TRACE_ALWAYS,
    + "Object in directory %d times",
    + count);
    + YBUG();
    + }
    +}
    +
    +void yaffs_verify_dir(struct yaffs_obj *directory)
    +{
    + struct list_head *lh;
    + struct yaffs_obj *list_obj;
    +
    + if (!directory) {
    + YBUG();
    + return;
    + }
    +
    + if (yaffs_skip_full_verification(directory->my_dev))
    + return;
    +
    + if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
    + yaffs_trace(YAFFS_TRACE_ALWAYS,
    + "Directory has wrong type: %d",
    + directory->variant_type);
    + YBUG();
    + }
    +
    + /* Iterate through the objects in each hash entry */
    +
    + list_for_each(lh, &directory->variant.dir_variant.children) {
    + list_obj = list_entry(lh, struct yaffs_obj, siblings);
    + if (list_obj->parent != directory) {
    + yaffs_trace(YAFFS_TRACE_ALWAYS,
    + "Object in directory list has wrong parent %p",
    + list_obj->parent);
    + YBUG();
    + }
    + yaffs_verify_obj_in_dir(list_obj);
    + }
    +}
    +
    +static int yaffs_free_verification_failures;
    +
    +void yaffs_verify_free_chunks(struct yaffs_dev *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) {
    + yaffs_trace(YAFFS_TRACE_ALWAYS,
    + "Freechunks verification failure %d %d %d",
    + dev->n_free_chunks, counted, difference);
    + yaffs_free_verification_failures++;
    + }
    +}
    +
    +int yaffs_verify_file_sane(struct yaffs_obj *in)
    +{
    + in = in;
    + return YAFFS_OK;
    +}
    +
    diff --git a/fs/yaffs2/yaffs_verify.h b/fs/yaffs2/yaffs_verify.h
    new file mode 100644
    index 0000000..cc6f889
    --- /dev/null
    +++ b/fs/yaffs2/yaffs_verify.h
    @@ -0,0 +1,43 @@
    +/*
    + * 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 Lesser General Public License version 2.1 as
    + * published by the Free Software Foundation.
    + *
    + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
    + */
    +
    +#ifndef __YAFFS_VERIFY_H__
    +#define __YAFFS_VERIFY_H__
    +
    +#include "yaffs_guts.h"
    +
    +void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi,
    + int n);
    +void yaffs_verify_collected_blk(struct yaffs_dev *dev,
    + struct yaffs_block_info *bi, int n);
    +void yaffs_verify_blocks(struct yaffs_dev *dev);
    +
    +void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh,
    + struct yaffs_ext_tags *tags, int parent_check);
    +void yaffs_verify_file(struct yaffs_obj *obj);
    +void yaffs_verify_link(struct yaffs_obj *obj);
    +void yaffs_verify_symlink(struct yaffs_obj *obj);
    +void yaffs_verify_special(struct yaffs_obj *obj);
    +void yaffs_verify_obj(struct yaffs_obj *obj);
    +void yaffs_verify_objects(struct yaffs_dev *dev);
    +void yaffs_verify_obj_in_dir(struct yaffs_obj *obj);
    +void yaffs_verify_dir(struct yaffs_obj *directory);
    +void yaffs_verify_free_chunks(struct yaffs_dev *dev);
    +
    +int yaffs_verify_file_sane(struct yaffs_obj *obj);
    +
    +int yaffs_skip_verification(struct yaffs_dev *dev);
    +
    +#endif
    --
    1.7.1


    \
     
     \ /
      Last update: 2011-01-14 04:11    [W:0.059 / U:0.112 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site