105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/*
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* Copyright (c) 2006-2021, 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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*/
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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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#endif
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struct rt_pollreq;
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struct dfs_file_ops
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{
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int (*open) (struct dfs_fd *fd);
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int (*close) (struct dfs_fd *fd);
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int (*ioctl) (struct dfs_fd *fd, int cmd, void *args);
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int (*read) (struct dfs_fd *fd, void *buf, size_t count);
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int (*write) (struct dfs_fd *fd, const void *buf, size_t count);
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int (*flush) (struct dfs_fd *fd);
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int (*lseek) (struct dfs_fd *fd, off_t offset);
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int (*getdents) (struct dfs_fd *fd, struct dirent *dirp, uint32_t count);
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int (*poll) (struct dfs_fd *fd, struct rt_pollreq *req);
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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_fnode
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{
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uint16_t type; /* Type (regular or socket) */
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char *path; /* Name (below mount point) */
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char *fullpath; /* Full path is hash key */
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int ref_count; /* Descriptor reference count */
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rt_list_t list; /* The node of vnode hash table */
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struct dfs_filesystem *fs;
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const struct dfs_file_ops *fops;
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uint32_t flags; /* self flags, is dir etc.. */
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size_t size; /* Size in bytes */
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void *data; /* Specific file system data */
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};
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struct dfs_fd
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{
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uint16_t magic; /* file descriptor magic number */
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uint32_t flags; /* Descriptor flags */
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int ref_count; /* Descriptor reference count */
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off_t pos; /* Current file position */
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struct dfs_fnode *vnode; /* file node struct */
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void *data; /* Specific fd data */
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};
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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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void *ret;
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};
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void dfs_fnode_mgr_init(void);
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int dfs_file_is_open(const char *pathname);
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int dfs_file_open(struct dfs_fd *fd, const char *path, int flags);
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int dfs_file_close(struct dfs_fd *fd);
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int dfs_file_ioctl(struct dfs_fd *fd, int cmd, void *args);
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int dfs_file_read(struct dfs_fd *fd, void *buf, size_t len);
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int dfs_file_getdents(struct dfs_fd *fd, struct dirent *dirp, size_t nbytes);
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int dfs_file_unlink(const char *path);
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int dfs_file_write(struct dfs_fd *fd, const void *buf, size_t len);
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int dfs_file_flush(struct dfs_fd *fd);
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int dfs_file_lseek(struct dfs_fd *fd, off_t offset);
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int dfs_file_stat(const char *path, struct stat *buf);
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int dfs_file_rename(const char *oldpath, const char *newpath);
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int dfs_file_ftruncate(struct dfs_fd *fd, off_t length);
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int dfs_file_mmap2(struct dfs_fd *fd, struct dfs_mmap2_args *mmap2);
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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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#ifdef __cplusplus
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}
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#endif
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#endif
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