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/****************************************************************************
* fs_internal.h
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 Gregory Nutt 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.
*
****************************************************************************/
#ifndef __FS_INTERNAL_H
#define __FS_INTERNAL_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/fs.h>
#include <dirent.h>
#include <nuttx/compiler.h>
/****************************************************************************
* Definitions
****************************************************************************/
#define FSNODEFLAG_TYPE_MASK 0x00000003
#define FSNODEFLAG_TYPE_DRIVER 0x00000000
#define FSNODEFLAG_TYPE_BLOCK 0x00000001
#define FSNODEFLAG_TYPE_MOUNTPT 0x00000002
#define FSNODEFLAG_DELETED 0x00000004
#define INODE_IS_DRIVER(i) \
(((i)->i_flags & FSNODEFLAG_TYPE_MASK) == FSNODEFLAG_TYPE_DRIVER)
#define INODE_IS_BLOCK(i) \
(((i)->i_flags & FSNODEFLAG_TYPE_BLOCK) == FSNODEFLAG_TYPE_BLOCK)
#define INODE_IS_MOUNTPT(i) \
(((i)->i_flags & FSNODEFLAG_TYPE_MOUNTPT) == FSNODEFLAG_TYPE_MOUNTPT)
#define INODE_SET_DRIVER(i) \
((i)->i_flags &= ~FSNODEFLAG_TYPE_MASK)
#define INODE_SET_BLOCK(i) \
((i)->i_flags = (((i)->i_flags & ~FSNODEFLAG_TYPE_MASK) | FSNODEFLAG_TYPE_BLOCK))
#define INODE_SET_MOUNTP(i) \
((i)->i_flags = (((i)->i_flags & ~FSNODEFLAG_TYPE_MASK) | FSNODEFLAG_TYPE_MOUNTP))
/****************************************************************************
* Public Types
****************************************************************************/
/* The internal representation of type DIR is just a
* container for an inode reference and a dirent structure.
*/
struct internal_dir_s
{
struct inode *root; /* The start inode (in case we
* rewind) */
struct inode *next; /* The inode to use for the next call
* to readdir() */
struct dirent dir; /* Populated using inode when readdir
* is called */
};
/****************************************************************************
* Global Variables
****************************************************************************/
extern FAR struct inode *root_inode;
/****************************************************************************
* Pulblic Function Prototypes
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/* fs_inode.c ***************************************************************/
EXTERN void inode_semtake(void);
EXTERN void inode_semgive(void);
EXTERN FAR struct inode *inode_search(const char **path,
FAR struct inode **peer,
FAR struct inode **parent,
const char **relpath);
EXTERN void inode_free(FAR struct inode *node);
EXTERN const char *inode_nextname(const char *name);
/* fs_inodereserver.c ********************************************************/
EXTERN FAR struct inode *inode_reserve(const char *path);
/* fs_inoderemove.c **********************************************************/
EXTERN STATUS inode_remove(const char *path);
/* fs_inodefind.c ************************************************************/
EXTERN FAR struct inode *inode_find(const char *path, const char **relpath);
/* fs_inodefinddir.c *********************************************************/
EXTERN FAR struct inode *inode_finddir(const char *path);
/* fs_inodeaddref.c **********************************************************/
EXTERN void inode_addref(FAR struct inode *inode);
/* fs_inoderelease.c *********************************************************/
EXTERN void inode_release(FAR struct inode *inode);
/* fs_files.c ***************************************************************/
#if CONFIG_NFILE_DESCRIPTORS >0
EXTERN void weak_function files_initialize(void);
EXTERN int files_allocate(FAR struct inode *inode, int oflags, off_t pos);
EXTERN void files_release(int filedes);
#endif
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __FS_INTERNAL_H */
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