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/****************************************************************************
* fs/driver/fs_registerblockdriver.c
*
* Copyright (C) 2007-2009, 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <sys/types.h>
#include <errno.h>
#include <nuttx/fs/fs.h>
#include "inode/inode.h"
#ifndef CONFIG_DISABLE_MOUNTPOINT
/****************************************************************************
* Pre-processor oDefinitions
****************************************************************************/
/****************************************************************************
* Private Variables
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: register_blockdriver
*
* Description:
* Register a block driver inode the pseudo file system.
*
* Input parameters:
* path - The path to the inode to create
* bops - The block driver operations structure
* mode - inmode priviledges (not used)
* priv - Private, user data that will be associated with the inode.
*
* Returned Value:
* Zero on success (with the inode point in 'inode'); A negated errno
* value is returned on a failure (all error values returned by
* inode_reserve):
*
* EINVAL - 'path' is invalid for this operation
* EEXIST - An inode already exists at 'path'
* ENOMEM - Failed to allocate in-memory resources for the operation
*
****************************************************************************/
int register_blockdriver(FAR const char *path,
FAR const struct block_operations *bops,
mode_t mode, FAR void *priv)
{
FAR struct inode *node;
int ret;
/* Insert an inode for the device driver -- we need to hold the inode
* semaphore to prevent access to the tree while we this. This is because
* we will have a momentarily bad true until we populate the inode with
* valid data.
*/
inode_semtake();
ret = inode_reserve(path, &node);
if (ret >= 0)
{
/* We have it, now populate it with block driver specific information. */
INODE_SET_BLOCK(node);
node->u.i_bops = bops;
#ifdef CONFIG_FILE_MODE
node->i_mode = mode;
#endif
node->i_private = priv;
ret = OK;
}
inode_semgive();
return ret;
}
#endif /* !CONFIG_DISABLE_MOUNTPOINT */
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