diff options
Diffstat (limited to 'nuttx/fs/nxffs/nxffs_blockstats.c')
| -rw-r--r-- | nuttx/fs/nxffs/nxffs_blockstats.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/nuttx/fs/nxffs/nxffs_blockstats.c b/nuttx/fs/nxffs/nxffs_blockstats.c new file mode 100644 index 000000000..590aa2ad0 --- /dev/null +++ b/nuttx/fs/nxffs/nxffs_blockstats.c @@ -0,0 +1,152 @@ +/**************************************************************************** + * fs/nxffs/nxffs_blockstats.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <nuttx/config.h> + +#include <string.h> +#include <errno.h> +#include <debug.h> + +#include <nuttx/mtd.h> + +#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) +{ + FAR uint8_t *bptr; /* Pointer to next block data */ + off_t ioblock; /* I/O block number */ + int lblock; /* Logical block index */ + int ret; + + /* Process each erase block */ + + memset(stats, 0, sizeof(struct nxffs_blkstats_s)); + + 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("Failed to read erase block %d: %d\n", ioblock / volume->blkper, -ret); + return ret; + } + + /* Process each logical block */ + + for (bptr = volume->pack, lblock = 0; + lblock < volume->blkper; + bptr += volume->geo.blocksize, lblock++) + { + FAR struct nxffs_block_s *blkhdr = (FAR struct nxffs_block_s*)bptr; + + /* Collect statistics */ + + stats->nblocks++; + if (memcmp(blkhdr->magic, g_blockmagic, NXFFS_MAGICSIZE) != 0) + { + stats->nunformat++; + } + else if (blkhdr->state == BLOCK_STATE_BAD) + { + stats->nbad++; + } + else if (blkhdr->state == BLOCK_STATE_GOOD) + { + stats-> ngood++; + } + else + { + 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); + return OK; +} + + |