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    Subject[PATCH 7/8] Add yaffs2 file system: verification code and other headers
    Date
    Signed-off-by: Charles Manning <cdhmanning@gmail.com>
    ---
    fs/yaffs2/yaffs_getblockinfo.h | 36 +++
    fs/yaffs2/yaffs_linux.h | 41 +++
    fs/yaffs2/yaffs_tagsvalidity.c | 27 ++
    fs/yaffs2/yaffs_tagsvalidity.h | 23 ++
    fs/yaffs2/yaffs_trace.h | 59 +++++
    fs/yaffs2/yaffs_verify.c | 546 ++++++++++++++++++++++++++++++++++++++++
    fs/yaffs2/yaffs_verify.h | 43 ++++
    fs/yaffs2/yportenv.h | 91 +++++++
    8 files changed, 866 insertions(+), 0 deletions(-)
    create mode 100644 fs/yaffs2/yaffs_getblockinfo.h
    create mode 100644 fs/yaffs2/yaffs_linux.h
    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
    create mode 100644 fs/yaffs2/yportenv.h

    diff --git a/fs/yaffs2/yaffs_getblockinfo.h b/fs/yaffs2/yaffs_getblockinfo.h
    new file mode 100644
    index 0000000..108c361
    --- /dev/null
    +++ b/fs/yaffs2/yaffs_getblockinfo.h
    @@ -0,0 +1,36 @@
    +/*
    + * 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_GETBLOCKINFO_H__
    +#define __YAFFS_GETBLOCKINFO_H__
    +
    +#include "yaffs_guts.h"
    +#include "yaffs_trace.h"
    +
    +/* Function to manipulate block info */
    +static Y_INLINE struct yaffs_block_info *yaffs_get_block_info(struct yaffs_dev
    + *dev, int blk)
    +{
    + if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
    + T(YAFFS_TRACE_ERROR,
    + (TSTR
    + ("**>> yaffs: get_block_info block %d is not valid" TENDSTR),
    + blk));
    + YBUG();
    + }
    + return &dev->block_info[blk - dev->internal_start_block];
    +}
    +
    +#endif
    diff --git a/fs/yaffs2/yaffs_linux.h b/fs/yaffs2/yaffs_linux.h
    new file mode 100644
    index 0000000..3b508cb
    --- /dev/null
    +++ b/fs/yaffs2/yaffs_linux.h
    @@ -0,0 +1,41 @@
    +/*
    + * 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_LINUX_H__
    +#define __YAFFS_LINUX_H__
    +
    +#include "yportenv.h"
    +
    +struct yaffs_linux_context {
    + struct list_head context_list; /* List of these we have mounted */
    + struct yaffs_dev *dev;
    + struct super_block *super;
    + struct task_struct *bg_thread; /* Background thread for this device */
    + int bg_running;
    + struct mutex gross_lock; /* Gross locking mutex*/
    + u8 *spare_buffer; /* For mtdif2 use. Don't know the size of the buffer
    + * at compile time so we have to allocate it.
    + */
    + struct list_head search_contexts;
    + void (*put_super_fn) (struct super_block * sb);
    +
    + struct task_struct *readdir_process;
    + unsigned mount_id;
    +};
    +
    +#define yaffs_dev_to_lc(dev) ((struct yaffs_linux_context *)((dev)->os_context))
    +#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context))
    +
    +#endif
    diff --git a/fs/yaffs2/yaffs_tagsvalidity.c b/fs/yaffs2/yaffs_tagsvalidity.c
    new file mode 100644
    index 0000000..4358d79
    --- /dev/null
    +++ b/fs/yaffs2/yaffs_tagsvalidity.c
    @@ -0,0 +1,27 @@
    +/*
    + * 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..8f632ff
    --- /dev/null
    +++ b/fs/yaffs2/yaffs_trace.h
    @@ -0,0 +1,59 @@
    +/*
    + * 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
    +
    +#define T(mask, p) do { if ((mask) & (yaffs_trace_mask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0)
    +
    +#endif
    diff --git a/fs/yaffs2/yaffs_verify.c b/fs/yaffs2/yaffs_verify.c
    new file mode 100644
    index 0000000..fee3a1e
    --- /dev/null
    +++ b/fs/yaffs2/yaffs_verify.c
    @@ -0,0 +1,546 @@
    +/*
    + * 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 *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)
    + 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_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)
    + 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 */
    + in_use = yaffs_count_chunk_bits(dev, n);
    + if (in_use != 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, 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) {
    + 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(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++;
    + }
    +
    + 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), illegal_states));
    + if (state_count[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_state_name[i], state_count[i]));
    +
    + if (dev->blocks_in_checkpt != state_count[YAFFS_BLOCK_STATE_CHECKPOINT])
    + T(YAFFS_TRACE_VERIFY,
    + (TSTR("Checkpoint block count wrong dev %d count %d" TENDSTR),
    + dev->blocks_in_checkpt,
    + state_count[YAFFS_BLOCK_STATE_CHECKPOINT]));
    +
    + if (dev->n_erased_blocks != state_count[YAFFS_BLOCK_STATE_EMPTY])
    + T(YAFFS_TRACE_VERIFY,
    + (TSTR("Erased block count wrong dev %d count %d" TENDSTR),
    + dev->n_erased_blocks, state_count[YAFFS_BLOCK_STATE_EMPTY]));
    +
    + if (state_count[YAFFS_BLOCK_STATE_COLLECTING] > 1)
    + T(YAFFS_TRACE_VERIFY,
    + (TSTR("Too many collecting blocks %d (max is 1)" TENDSTR),
    + state_count[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(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)) {
    + 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 parent_check requested.
    + *
    + * Tests do not apply to the root object.
    + */
    +
    + if (parent_check && 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 (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))
    + 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));
    +}
    +
    +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) {
    + /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),obj_id,i,the_chunk)); */
    + yaffs_rd_chunk_tags_nand(dev, the_chunk, 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, 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)) {
    + T(YAFFS_TRACE_VERIFY,
    + (TSTR("Obj %d has chunk_id %d %s %s" TENDSTR),
    + 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)) {
    + 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(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) {
    + if (lh) {
    + 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) {
    + 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 */
    +
    + list_for_each(lh, &obj->parent->variant.dir_variant.children) {
    + if (lh) {
    + list_obj = list_entry(lh, struct yaffs_obj, siblings);
    + yaffs_verify_obj(list_obj);
    + if (obj == list_obj)
    + count++;
    + }
    + }
    +
    + if (count != 1) {
    + T(YAFFS_TRACE_ALWAYS,
    + (TSTR("Object in directory %d times" TENDSTR), 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) {
    + T(YAFFS_TRACE_ALWAYS,
    + (TSTR("Directory has wrong type: %d" TENDSTR),
    + directory->variant_type));
    + YBUG();
    + }
    +
    + /* Iterate through the objects in each hash entry */
    +
    + list_for_each(lh, &directory->variant.dir_variant.children) {
    + if (lh) {
    + list_obj = list_entry(lh, struct yaffs_obj, siblings);
    + if (list_obj->parent != directory) {
    + T(YAFFS_TRACE_ALWAYS,
    + (TSTR
    + ("Object in directory list has wrong parent %p"
    + TENDSTR), 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) {
    + 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(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
    diff --git a/fs/yaffs2/yportenv.h b/fs/yaffs2/yportenv.h
    new file mode 100644
    index 0000000..8fd0da5
    --- /dev/null
    +++ b/fs/yaffs2/yportenv.h
    @@ -0,0 +1,91 @@
    +/*
    + * 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 __YPORTENV_LINUX_H__
    +#define __YPORTENV_LINUX_H__
    +
    +#include <linux/version.h>
    +#include <linux/kernel.h>
    +#include <linux/mm.h>
    +#include <linux/sched.h>
    +#include <linux/string.h>
    +#include <linux/slab.h>
    +#include <linux/vmalloc.h>
    +#include <linux/xattr.h>
    +#include <linux/list.h>
    +#include <linux/types.h>
    +#include <linux/fs.h>
    +#include <linux/stat.h>
    +#include <linux/sort.h>
    +#include <linux/bitops.h>
    +
    +#define YCHAR char
    +#define YUCHAR unsigned char
    +#define _Y(x) x
    +#define yaffs_strcat(a, b) strcat(a, b)
    +#define yaffs_strcpy(a, b) strcpy(a, b)
    +#define yaffs_strncpy(a, b, c) strncpy(a, b, c)
    +#define yaffs_strncmp(a, b, c) strncmp(a, b, c)
    +#define yaffs_strnlen(s,m) strnlen(s,m)
    +#define yaffs_sprintf sprintf
    +#define yaffs_toupper(a) toupper(a)
    +
    +#define yaffs_sort(base, n, sz, cmp_fn) sort(base, n, sz, cmp_fn, NULL)
    +
    +#define Y_INLINE __inline__
    +
    +#define YAFFS_LOSTNFOUND_NAME "lost+found"
    +#define YAFFS_LOSTNFOUND_PREFIX "obj"
    +
    +#define YMALLOC(x) kmalloc(x, GFP_NOFS)
    +#define YFREE(x) kfree(x)
    +#define YMALLOC_ALT(x) vmalloc(x)
    +#define YFREE_ALT(x) vfree(x)
    +#define YMALLOC_DMA(x) YMALLOC(x)
    +
    +#define YYIELD() schedule()
    +#define Y_DUMP_STACK() dump_stack()
    +
    +#define YAFFS_ROOT_MODE 0755
    +#define YAFFS_LOSTNFOUND_MODE 0700
    +
    +#define Y_CURRENT_TIME CURRENT_TIME.tv_sec
    +#define Y_TIME_CONVERT(x) (x).tv_sec
    +
    +#define yaffs_sum_cmp(x, y) ((x) == (y))
    +#define yaffs_strcmp(a, b) strcmp(a, b)
    +
    +#define TENDSTR "\n"
    +#define TSTR(x) KERN_DEBUG x
    +#define TCONT(x) x
    +#define TOUT(p) printk p
    +
    +#define compile_time_assertion(assertion) \
    + ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
    +
    +#ifndef Y_DUMP_STACK
    +#define Y_DUMP_STACK() do { } while (0)
    +#endif
    +
    +#ifndef YBUG
    +#define YBUG() do {\
    + T(YAFFS_TRACE_BUG,\
    + (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),\
    + __LINE__));\
    + Y_DUMP_STACK();\
    +} while (0)
    +#endif
    +
    +#endif
    --
    1.7.1


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