118 lines
4.1 KiB
C
118 lines
4.1 KiB
C
/****************************************************************************
|
|
* nuttx/fs/hostfs/hostfs.h
|
|
*
|
|
* Copyright (C) 2015 Ken Pettit. All rights reserved.
|
|
* Author: Ken Pettit <pettitkd@gmail.com>
|
|
*
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __FS_HOSTFS_HOSTFS_H
|
|
#define __FS_HOSTFS_HOSTFS_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <semaphore.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* Quasi-standard definitions */
|
|
|
|
#ifndef MIN
|
|
# define MIN(a,b) (a < b ? a : b)
|
|
#endif
|
|
|
|
#ifndef MAX
|
|
# define MAX(a,b) (a > b ? a : b)
|
|
#endif
|
|
|
|
#define HOSTFS_MAX_PATH 256
|
|
|
|
/****************************************************************************
|
|
* Public Types
|
|
****************************************************************************/
|
|
|
|
/* This structure describes the state of one open file. This structure
|
|
* is protected by the volume semaphore.
|
|
*/
|
|
|
|
struct hostfs_ofile_s
|
|
{
|
|
struct hostfs_ofile_s *fnext; /* Supports a singly linked list */
|
|
int16_t crefs; /* Reference count */
|
|
mode_t oflags; /* Open mode */
|
|
int fd;
|
|
};
|
|
|
|
/* This structure represents the overall mountpoint state. An instance of this
|
|
* structure is retained as inode private data on each mountpoint that is
|
|
* mounted with a hostfs filesystem.
|
|
*/
|
|
|
|
struct hostfs_mountpt_s
|
|
{
|
|
sem_t *fs_sem; /* Used to assure thread-safe access */
|
|
FAR struct hostfs_ofile_s *fs_head; /* A singly-linked list of open files */
|
|
char fs_root[HOSTFS_MAX_PATH];
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Internal function prototypes
|
|
****************************************************************************/
|
|
|
|
/* Semaphore access for internal use */
|
|
|
|
void hostfs_semtake(struct hostfs_mountpt_s *fs);
|
|
void hostfs_semgive(struct hostfs_mountpt_s *fs);
|
|
|
|
/* Forward references for utility functions */
|
|
|
|
struct hostfs_mountpt_s;
|
|
|
|
struct file; /* Forward references */
|
|
struct inode;
|
|
struct fs_dirent_s;
|
|
struct statfs;
|
|
struct stat;
|
|
|
|
#endif /* __FS_HOSTFS_HOSTFS_H */
|