134 lines
4.8 KiB
C
134 lines
4.8 KiB
C
/****************************************************************************
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* fs/driver/driver.h
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*
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* Copyright (C) 2007, 2009, 2012, 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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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#ifndef __FS_DRIVER_DRIVER_H
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#define __FS_DRIVER_DRIVER_H
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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 <nuttx/compiler.h>
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#include <nuttx/fs/fs.h>
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#include "inode/inode.h"
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/* fs_findblockdriver.c *****************************************************/
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/****************************************************************************
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* Name: find_blockdriver
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*
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* Description:
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* Return the inode of the block driver specified by 'pathname'
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*
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* Inputs:
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* pathname - the full path to the block driver to be located
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* mountflags - if MS_RDONLY is not set, then driver must support write
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* operations (see include/sys/mount.h)
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* ppinode - address of the location to return the inode reference
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*
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* Return:
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* Returns zero on success or a negated errno on failure:
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*
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* EINVAL - pathname or pinode is NULL
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* ENOENT - No block driver of this name is registered
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* ENOTBLK - The inode associated with the pathname is not a block driver
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* EACCESS - The MS_RDONLY option was not set but this driver does not
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* support write access
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*
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****************************************************************************/
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#ifndef CONFIG_DISABLE_MOUNTPOINT
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int find_blockdriver(FAR const char *pathname, int mountflags,
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FAR struct inode **ppinode);
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#endif
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/* fs/drivers/fs_blockproxy.c ***********************************************/
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/****************************************************************************
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* Name: block_proxy
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*
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* Description:
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* Create a temporary char driver using drivers/bch to mediate character
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* oriented accessed to the block driver.
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*
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* Input parameters:
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* blkdev - The path to the block driver
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* oflags - Character driver open flags
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*
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* Returned Value:
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* If positive, non-zero file descriptor is returned on success. This
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* is the file descriptor of the nameless character driver that mediates
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* accesses to the block driver.
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*
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* Errors that may be returned:
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*
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* ENOMEM - Failed to create a temporay path name.
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*
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* Plus:
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*
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* - Errors reported from bchdev_register()
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* - Errors reported from open() or unlink()
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*
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****************************************************************************/
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#if !defined(CONFIG_DISABLE_PSEUDOFS_OPERATIONS) && \
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!defined(CONFIG_DISABLE_MOUNTPOINT)
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int block_proxy(FAR const char *blkdev, int oflags);
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#endif
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __FS_DRIVER_DRIVER_H */
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