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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2005-01-26 Bernard The first version.
*/
#ifndef __DFS_FILE_H__
#define __DFS_FILE_H__
#include <dfs.h>
#include <dfs_fs.h>
#ifdef __cplusplus
extern "C" {
#endif
struct rt_pollreq;
struct dfs_file_ops
{
int (*open) (struct dfs_file *fd);
int (*close) (struct dfs_file *fd);
int (*ioctl) (struct dfs_file *fd, int cmd, void *args);
ssize_t (*read) (struct dfs_file *fd, void *buf, size_t count);
ssize_t (*write) (struct dfs_file *fd, const void *buf, size_t count);
int (*flush) (struct dfs_file *fd);
off_t (*lseek) (struct dfs_file *fd, off_t offset);
int (*getdents) (struct dfs_file *fd, struct dirent *dirp, uint32_t count);
int (*poll) (struct dfs_file *fd, struct rt_pollreq *req);
};
/* file descriptor */
#define DFS_FD_MAGIC 0xfdfd
struct dfs_vnode
{
uint16_t type; /* Type (regular or socket) */
char *path; /* Name (below mount point) */
char *fullpath; /* Full path is hash key */
int ref_count; /* Descriptor reference count */
rt_list_t list; /* The node of vnode hash table */
struct dfs_filesystem *fs;
const struct dfs_file_ops *fops;
uint32_t flags; /* self flags, is dir etc.. */
size_t size; /* Size in bytes */
void *data; /* Specific file system data */
};
struct dfs_file
{
uint16_t magic; /* file descriptor magic number */
uint32_t flags; /* Descriptor flags */
int ref_count; /* Descriptor reference count */
off_t pos; /* Current file position */
struct dfs_vnode *vnode; /* file node struct */
void *data; /* Specific fd data */
};
#define DFS_FILE_POS(dfs_file) ((dfs_file)->pos)
#ifdef RT_USING_SMART
struct dfs_mmap2_args
{
void *addr;
size_t length;
int prot;
int flags;
off_t pgoffset;
struct rt_lwp *lwp;
void *ret;
};
#endif
void dfs_vnode_mgr_init(void);
int dfs_vnode_init(struct dfs_vnode *vnode, int type, const struct dfs_file_ops *fops);
int dfs_file_is_open(const char *pathname);
int dfs_file_open(struct dfs_file *fd, const char *path, int flags);
int dfs_file_close(struct dfs_file *fd);
int dfs_file_ioctl(struct dfs_file *fd, int cmd, void *args);
ssize_t dfs_file_read(struct dfs_file *fd, void *buf, size_t len);
int dfs_file_getdents(struct dfs_file *fd, struct dirent *dirp, size_t nbytes);
int dfs_file_unlink(const char *path);
ssize_t dfs_file_write(struct dfs_file *fd, const void *buf, size_t len);
int dfs_file_flush(struct dfs_file *fd);
off_t dfs_file_lseek(struct dfs_file *fd, off_t offset);
int dfs_file_stat(const char *path, struct stat *buf);
int dfs_file_rename(const char *oldpath, const char *newpath);
int dfs_file_ftruncate(struct dfs_file *fd, off_t length);
#ifdef RT_USING_SMART
int dfs_file_mmap2(struct dfs_file *fd, 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
#ifdef __cplusplus
}
#endif
#endif
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