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