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