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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2005-01-26 Bernard The first version.
* 2023-05-05 Bernard Change to dfs v2.0
*/
#ifndef __DFS_FILE_H__
#define __DFS_FILE_H__
#include <dfs.h>
#include <dfs_fs.h>
#ifdef __cplusplus
extern "C"
{
#endif
#define STDIN_FILENO 0 /* standard input file descriptor */
#define STDOUT_FILENO 1 /* standard output file descriptor */
#define STDERR_FILENO 2 /* standard error file descriptor */
struct dfs_file;
struct dfs_vnode;
struct dfs_dentry;
struct dfs_attr;
struct rt_pollreq;
struct dirent;
struct lwp_avl_struct;
struct file_lock;
struct dfs_aspace;
struct dfs_file_ops
{
int (*open)(struct dfs_file *file);
int (*close)(struct dfs_file *file);
int (*ioctl)(struct dfs_file *file, int cmd, void *arg);
ssize_t (*read)(struct dfs_file *file, void *buf, size_t count, off_t *pos);
ssize_t (*write)(struct dfs_file *file, const void *buf, size_t count, off_t *pos);
int (*flush)(struct dfs_file *file);
off_t (*lseek)(struct dfs_file *file, off_t offset, int wherece);
int (*truncate)(struct dfs_file *file, off_t offset);
int (*getdents)(struct dfs_file *file, struct dirent *dirp, uint32_t count);
int (*poll)(struct dfs_file *file, struct rt_pollreq *req);
int (*mmap)(struct dfs_file *file, struct lwp_avl_struct *mmap);
int (*lock)(struct dfs_file *file, struct file_lock *flock);
int (*flock)(struct dfs_file *file, int, struct file_lock *flock);
};
struct dfs_vnode
{
uint32_t flags;
uint32_t mode;
int type; /* node type */
rt_atomic_t ref_count; /* reference count */
struct dfs_mnt *mnt; /* which mounted file system does this vnode belong to */
size_t size;
uint32_t nlink;
const struct dfs_file_ops *fops;
unsigned int uid;
unsigned int gid;
struct timespec atime;
struct timespec mtime;
struct timespec ctime;
struct dfs_aspace *aspace;
struct rt_mutex lock;
void *data; /* private data of this file system */
};
/* file descriptor */
#define DFS_FD_MAGIC 0xfdfd
struct dfs_file
{
uint16_t magic;
uint16_t mode;
uint32_t flags;
rt_atomic_t ref_count;
off_t fpos;
struct rt_mutex pos_lock;
const struct dfs_file_ops *fops;
struct dfs_dentry *dentry; /* dentry of this file */
struct dfs_vnode *vnode; /* vnode of this file */
void *mmap_context; /* used by mmap routine */
void *data;
};
#define DFS_FILE_POS(dfs_file) ((dfs_file)->fpos)
/* file is open for reading */
#define FMODE_READ 0x1
/* file is open for writing */
#define FMODE_WRITE 0x2
/* file is seekable */
#define FMODE_LSEEK 0x4
/* file can be accessed using pread */
#define FMODE_PREAD 0x8
/* file can be accessed using pwrite */
#define FMODE_PWRITE 0x10
/* File is opened for execution with sys_execve / sys_uselib */
#define FMODE_EXEC 0x20
/* File is opened with O_NDELAY (only set for block devices) */
#define FMODE_NDELAY 0x40
/* File is opened with O_EXCL (only set for block devices) */
#define FMODE_EXCL 0x80
/* dfs_vnode.c */
int dfs_vnode_init(struct dfs_vnode *vnode, int type, const struct dfs_file_ops *fops);
struct dfs_vnode *dfs_vnode_create(void);
int dfs_vnode_destroy(struct dfs_vnode* vnode);
rt_err_t dfs_vnode_lock_init(struct dfs_vnode *vnode, struct dfs_dentry *dentry);
struct dfs_vnode *dfs_vnode_ref(struct dfs_vnode *vnode);
void dfs_vnode_unref(struct dfs_vnode *vnode);
/*dfs_file.c*/
#ifdef RT_USING_SMART
struct dfs_mmap2_args
{
void *addr;
size_t length;
int prot;
int flags;
off_t pgoffset;
size_t min_align_size;
struct rt_lwp *lwp;
void *ret;
};
#endif
void dfs_file_init(struct dfs_file *file);
void dfs_file_deinit(struct dfs_file *file);
int dfs_file_open(struct dfs_file *file, const char *path, int flags, mode_t mode);
int dfs_file_mknod(const char *path, int type, mode_t mode);
int dfs_file_close(struct dfs_file *file);
off_t dfs_file_get_fpos(struct dfs_file *file);
void dfs_file_set_fpos(struct dfs_file *file, off_t fpos);
ssize_t dfs_file_pread(struct dfs_file *file, void *buf, size_t len, off_t offset);
ssize_t dfs_file_read(struct dfs_file *file, void *buf, size_t len);
ssize_t dfs_file_pwrite(struct dfs_file *file, const void *buf, size_t len, off_t offset);
ssize_t dfs_file_write(struct dfs_file *file, const void *buf, size_t len);
off_t generic_dfs_lseek(struct dfs_file *file, off_t offset, int whence);
off_t dfs_file_lseek(struct dfs_file *file, off_t offset, int wherece);
int dfs_file_stat(const char *path, struct stat *buf);
int dfs_file_lstat(const char *path, struct stat *buf);
int dfs_file_setattr(const char *path, struct dfs_attr *attr);
int dfs_file_fsetattr(struct dfs_file *file, struct dfs_attr *attr);
int dfs_file_fstat(struct dfs_file *file, struct stat *buf);
int dfs_file_ioctl(struct dfs_file *file, int cmd, void *args);
int dfs_file_fcntl(int fd, int cmd, unsigned long arg);
int dfs_record_lock_init(void);
int dfs_record_lock_fcntl(struct dfs_file *file, int cmd, struct flock *flock);
void dfs_record_lock_release(struct dfs_file *file, struct dfs_fdtable *owner);
int dfs_file_fsync(struct dfs_file *file);
int dfs_file_unlink(const char *path);
int dfs_file_link(const char *oldname, const char *newname);
int dfs_file_symlink(const char *oldname, const char *name);
int dfs_file_readlink(const char *path, char *buf, int bufsize);
int dfs_file_rename(const char *old_file, const char *new_file);
int dfs_file_ftruncate(struct dfs_file *file, off_t length);
int dfs_file_getdents(struct dfs_file *file, struct dirent *dirp, size_t nbytes);
int dfs_file_mkdir(const char *path, mode_t mode);
int dfs_file_rmdir(const char *pathname);
int dfs_file_isdir(const char *path);
int dfs_file_access(const char *path, mode_t mode);
int dfs_file_chdir(const char *path);
char *dfs_file_getcwd(char *buf, size_t size);
#ifdef RT_USING_SMART
int dfs_file_mmap2(struct dfs_file *file, struct dfs_mmap2_args *mmap2);
int dfs_file_mmap(struct dfs_file *file, struct dfs_mmap2_args *mmap2);
#endif
/* 0x5254 is just a magic number to make these relatively unique ("RT") */
#define RT_FIOFTRUNCATE 0x52540000U
#define RT_FIOGETADDR 0x52540001U
#define RT_FIOMMAP2 0x52540002U
/* dfs_file_realpath mode */
#define DFS_REALPATH_EXCEPT_LAST 0
#define DFS_REALPATH_EXCEPT_NONE 1
#define DFS_REALPATH_ONLY_LAST 3
char *dfs_file_realpath(struct dfs_mnt **mnt, const char *fullpath, int mode);
#ifdef __cplusplus
}
#endif
#endif
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