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fs/hostfs: Add a special file system for use with simulator that supports access to the host file system from the simulation. From Ken Petit
This commit is contained in:
Ken Pettit
Gregory Nutt
@@ -177,6 +177,17 @@ struct fs_unionfsdir_s
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};
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#endif
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#ifdef CONFIG_FS_HOSTFS
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/* HOSTFS provides mapping to directories on the host machine in the
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* sim environment.
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*/
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struct fs_hostfsdir_s
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{
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FAR void * fs_dir; /* Opaque pointer to host DIR * */
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};
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#endif
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#endif /* CONFIG_DISABLE_MOUNTPOINT */
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struct fs_dirent_s
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@@ -243,6 +254,9 @@ struct fs_dirent_s
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#ifdef CONFIG_FS_UNIONFS
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struct fs_unionfsdir_s unionfs;
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#endif
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#ifdef CONFIG_FS_HOSTFS
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struct fs_hostfsdir_s hostfs;
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#endif
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#endif /* !CONFIG_DISABLE_MOUNTPOINT */
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} u;
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@@ -0,0 +1,133 @@
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/****************************************************************************
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* include/nuttx/fs/hostfs.h
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*
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* Copyright (C) 2015 Ken Pettit. All rights reserved.
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* Author: Ken Pettit <pettitkd@gmail.com>
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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 __INCLUDE_NUTTX_FS_HOSTFS_H
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#define __INCLUDE_NUTTX_FS_HOSTFS_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define HOST_ST_MODE_REG 0x01000
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#define HOST_ST_MODE_DIR 0x02000
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#define HOST_ST_MODE_CHR 0x04000
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#define HOST_ST_MODE_BLK 0x08000
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#define HOST_ST_MODE_PIPE 0x10000
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#define HOST_ST_MODE_LINK 0x20000
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#define HOSTFS_FLAG_RDOK 0x0001
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#define HOSTFS_FLAG_WROK 0x0002
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#define HOSTFS_FLAG_CREAT 0x0004
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#define HOSTFS_FLAG_EXCL 0x0008
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#define HOSTFS_FLAG_APPEND 0x0010
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#define HOSTFS_FLAG_TRUNC 0x0020
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#define HOSTFS_DTYPE_FILE 0x0001
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#define HOSTFS_DTYPE_CHR 0x0002
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#define HOSTFS_DTYPE_BLK 0x0004
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#define HOSTFS_DTYPE_DIRECTORY 0x0008
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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struct host_dirent_s
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{
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size_t d_ino;
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size_t d_off;
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unsigned short d_reclen;
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unsigned char d_type;
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char d_name[256];
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};
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struct host_statfs_s
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{
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size_t f_type; /* Type of file system */
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size_t f_bsize; /* Optimal transfer block size */
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size_t f_blocks; /* Total data blocks in the file system */
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size_t f_bfree; /* Free blocks */
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size_t f_bavail; /* Free blocks available */
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size_t f_files; /* Total file nodes in file system */
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size_t f_ffree; /* Free file nodes in fs */
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size_t f_fsid; /* File Systme ID */
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size_t f_namelen; /* Max length of filenames */
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size_t f_frsize; /* Fragment size */
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};
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struct host_stat_s
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{
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int st_dev; /* ID of the device containing file */
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size_t st_ino; /* inode number */
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size_t st_mode; /* protection */
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size_t st_nlink; /* number of hard links */
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size_t st_uid; /* user ID of owner */
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size_t st_gid; /* group ID of owner */
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size_t st_rdev; /* device ID */
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size_t st_size; /* total size, in bytes */
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size_t st_blksize; /* blocksize for file system I/O */
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size_t st_blocks; /* number of 512B blocks allocated */
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size_t st_atim; /* time of last access */
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size_t st_mtim; /* time of last modification */
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size_t st_ctim; /* time of last status change */
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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int host_open(const char *pathname, int flags, int mode);
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int host_close(int fd);
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ssize_t host_read(int fd, void* buf, size_t count);
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ssize_t host_write(int fd, const void *buf, size_t count);
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off_t host_lseek(int fd, off_t offset, int whence);
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int host_ioctl(int fd, int request, unsigned long arg);
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void host_sync(int fd);
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int host_dup(int fd);
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void *host_opendir(const char *name);
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int host_readdir(void* dirp, struct host_dirent_s* entry);
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void host_rewinddir(void* dirp);
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int host_closedir(void* dirp);
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int host_statfs(const char *path, struct host_statfs_s *buf);
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int host_unlink(const char *pathname);
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int host_mkdir(const char *pathname, mode_t mode);
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int host_rmdir(const char *pathname);
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int host_rename(const char *oldpath, const char *newpath);
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int host_stat(const char *path, struct host_stat_s *buf);
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#endif /* __INCLUDE_NUTTX_FS_HOSTFS_H */
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@@ -103,6 +103,7 @@
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#define NXFFS_MAGIC 0x4747
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#define SMARTFS_MAGIC 0x54524D53
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#define UNIONFS_MAGIC 0x53464e55
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#define HOSTFS_MAGIC 0x54534f48
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/****************************************************************************
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* Type Definitions
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