234 lines
7.7 KiB
C
234 lines
7.7 KiB
C
/****************************************************************************
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* fs/nxffs/nxffs_blockstats.c
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* References: Linux/Documentation/filesystems/romfs.txt
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <string.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/mtd/mtd.h>
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#include "nxffs.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxffs_blockstats
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*
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* Description:
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* Analyze the NXFFS volume. This operation must be performed when the
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* volume is first mounted in order to detect if the volume has been
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* formatted and contains a usable NXFFS file system.
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*
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* Input Parameters:
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* volume - Describes the current NXFFS volume.
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* stats - On return, will hold nformation describing the state of the
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* volume.
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*
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* Returned Value:
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* Negated errnos are returned only in the case of MTD reported failures.
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* Nothing in the volume data itself will generate errors.
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*
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****************************************************************************/
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int nxffs_blockstats(FAR struct nxffs_volume_s *volume,
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FAR struct nxffs_blkstats_s *stats)
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{
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#ifndef CONFIG_NXFFS_NAND
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FAR uint8_t *bptr; /* Pointer to next block data */
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int lblock; /* Logical block index */
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#endif
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off_t ioblock; /* I/O block number */
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int ret;
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/* Process each erase block */
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memset(stats, 0, sizeof(struct nxffs_blkstats_s));
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#ifndef CONFIG_NXFFS_NAND
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for (ioblock = 0; ioblock < volume->nblocks; ioblock += volume->blkper)
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{
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/* Read the full erase block */
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ret = MTD_BREAD(volume->mtd, ioblock, volume->blkper, volume->pack);
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if (ret < volume->blkper)
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{
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ferr("ERROR: Failed to read erase block %d: %d\n",
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ioblock / volume->blkper, ret);
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return ret;
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}
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/* Then examine each logical block in the erase block */
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for (bptr = volume->pack, lblock = 0;
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lblock < volume->blkper;
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bptr += volume->geo.blocksize, lblock++)
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{
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/* We read the block successfully, now check for errors tagged
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* in the NXFFS data.
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*/
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FAR struct nxffs_block_s *blkhdr = (FAR struct nxffs_block_s *)bptr;
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/* Increment the total count of blocks examined */
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stats->nblocks++;
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/* Collect statistics */
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/* Check if this is a block that should be recognized by NXFFS */
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if (memcmp(blkhdr->magic, g_blockmagic, NXFFS_MAGICSIZE) != 0)
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{
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/* Nope.. block must not be formatted */
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stats->nunformat++;
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}
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else if (blkhdr->state == BLOCK_STATE_BAD)
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{
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/* The block is marked as bad */
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stats->nbad++;
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}
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else if (blkhdr->state == BLOCK_STATE_GOOD)
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{
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/* The block is marked as good */
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stats-> ngood++;
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}
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else
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{
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/* The good/bad mark is not recognized. Let's call this
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* corrupt (vs. unformatted).
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*/
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stats->ncorrupt++;
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}
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}
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}
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finfo("Number blocks: %d\n", stats->nblocks);
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finfo(" Good blocks: %d\n", stats->ngood);
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finfo(" Bad blocks: %d\n", stats->nbad);
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finfo(" Unformatted blocks: %d\n", stats->nunformat);
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finfo(" Corrupt blocks: %d\n", stats->ncorrupt);
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#else
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for (ioblock = 0; ioblock < volume->nblocks; ioblock++)
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{
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/* Increment the total count of blocks examined */
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stats->nblocks++;
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/* Read each logical block, one at a time. We could read all of the
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* blocks in the erase block into volume->pack at once. But this would
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* be a problem for NAND which may generate read errors due to bad ECC
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* on individual blocks.
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*/
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ret = MTD_BREAD(volume->mtd, ioblock, 1, volume->pack);
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if (ret < 1)
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{
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/* This should not happen at all on most kinds of FLASH. But a
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* bad read will happen normally with a NAND device that has
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* uncorrectable blocks. So, just for NAND, we keep the count
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* of unreadable blocks.
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*/
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ferr("ERROR: Failed to read block %d: %d\n", ioblock, ret);
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/* Increment the count of un-readable blocks */
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stats->nbadread++;
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}
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else
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{
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/* We read the block successfully, now check for errors tagged
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* in the NXFFS data.
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*/
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FAR struct nxffs_block_s *blkhdr = (FAR struct nxffs_block_s *)volume->pack;
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/* Collect statistics */
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/* Check if this is a block that should be recognized by NXFFS */
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if (memcmp(blkhdr->magic, g_blockmagic, NXFFS_MAGICSIZE) != 0)
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{
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/* Nope.. block must not be formatted */
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stats->nunformat++;
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}
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else if (blkhdr->state == BLOCK_STATE_BAD)
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{
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/* The block is marked as bad */
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stats->nbad++;
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}
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else if (blkhdr->state == BLOCK_STATE_GOOD)
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{
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/* The block is marked as good */
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stats-> ngood++;
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}
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else
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{
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/* The good/bad mark is not recognized. Let's call this
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* corrupt (vs. unformatted).
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*/
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stats->ncorrupt++;
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}
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}
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}
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finfo("Number blocks: %d\n", stats->nblocks);
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finfo(" Good blocks: %d\n", stats->ngood);
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finfo(" Bad blocks: %d\n", stats->nbad);
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finfo(" Unformatted blocks: %d\n", stats->nunformat);
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finfo(" Corrupt blocks: %d\n", stats->ncorrupt);
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finfo(" Unreadable blocks: %d\n", stats->nbadread);
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#endif
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return OK;
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}
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