diff options
Diffstat (limited to 'nuttx/fs/nxffs/nxffs_block.c')
| -rw-r--r-- | nuttx/fs/nxffs/nxffs_block.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/nuttx/fs/nxffs/nxffs_block.c b/nuttx/fs/nxffs/nxffs_block.c deleted file mode 100644 index 6701b6e6b..000000000 --- a/nuttx/fs/nxffs/nxffs_block.c +++ /dev/null @@ -1,186 +0,0 @@ -/**************************************************************************** - * fs/nxffs/nxffs_block.c - * - * Copyright (C) 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * 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 <assert.h> -#include <debug.h> - -#include <nuttx/mtd.h> - -#include "nxffs.h" - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Public Types - ****************************************************************************/ - -/**************************************************************************** - * Public Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: nxffs_verifyblock - * - * Description: - * Assure the the provided (logical) block number is in the block cache - * and that it has a valid block header (i.e., proper magic and - * marked good) - * - * Input Parameters: - * volume - Describes the NXFFS volume - * block - The (logical) block number to load and verify. - * - * Returned Values: - * Zero is returned on success. Otherwise, a negated errno value is - * returned indicating the nature of the failure. -ENOENT is returned - * if the block is a bad block. - * - ****************************************************************************/ - -int nxffs_verifyblock(FAR struct nxffs_volume_s *volume, off_t block) -{ - FAR struct nxffs_block_s *blkhdr; - int ret; - - /* Make sure the the block is in the cache */ - - ret = nxffs_rdcache(volume, block); - if (ret < 0) - { - /* Perhaps we are at the end of the media */ - - fvdbg("Failed to read data into cache: %d\n", ret); - return ret; - } - - /* Check if the block has a magic number (meaning that it is not - * erased) and that it is valid (meaning that it is not marked - * for deletion) - */ - - blkhdr = (FAR struct nxffs_block_s *)volume->cache; - if (memcmp(blkhdr->magic, g_blockmagic, NXFFS_MAGICSIZE) == 0) - { - /* This does appear to be a block */ - - if (blkhdr->state == BLOCK_STATE_GOOD) - { - /* The block is valid */ - - return OK; - } - else if (blkhdr->state == BLOCK_STATE_BAD) - { - /* -ENOENT is a special indication that this is a properly marked - * bad block - */ - - return -ENOENT; - } - } - - /* Whatever is here where a block header should be is invalid */ - - return -EINVAL; -} - -/**************************************************************************** - * Name: nxffs_validblock - * - * Description: - * Find the next valid (logical) block in the volume. - * - * Input Parameters: - * volume - Describes the NXFFS volume - * block - On entry, this provides the starting block number. If the - * function is succesfful, then this memory location will hold the - * block number of the next valid block on return. - * - * Returned Value: - * Zero on success otherwise a negated errno value indicating the nature - * of the failure. - * - ****************************************************************************/ - -int nxffs_validblock(struct nxffs_volume_s *volume, off_t *block) -{ - off_t i; - int ret; - - DEBUGASSERT(volume && block); - - /* Loop for each possible block or until a valid block is found */ - - for (i = *block; i < volume->nblocks; i++) - { - /* Loop until we find a valid block */ - - ret = nxffs_verifyblock(volume, i); - if (ret == OK) - { - /* We found it, return the block number */ - - *block = i; - return OK; - } - } - - /* ENOSPC is special return value that means that there is no further, - * valid blocks left in the volume. - */ - - fdbg("No valid block found\n"); - return -ENOSPC; -} |