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