57 int dfs_ramfs_ioctl(struct dfs_fd *file, int cmd, void *args)  in dfs_ramfs_ioctl()  argument
95 int dfs_ramfs_read(struct dfs_fd *file, void *buf, size_t count)  in dfs_ramfs_read()  argument
100     dirent = (struct ramfs_dirent *)file->data;  in dfs_ramfs_read()
103     if (count < file->size - file->pos)  in dfs_ramfs_read()
106         length = file->size - file->pos;  in dfs_ramfs_read()
109         memcpy(buf, &(dirent->data[file->pos]), length);  in dfs_ramfs_read()
111     /* update file current position */  in dfs_ramfs_read()
112     file->pos += length;  in dfs_ramfs_read()
139         /* update dirent and file size */  in dfs_ramfs_write()
148     /* update file current position */  in dfs_ramfs_write()
154 int dfs_ramfs_lseek(struct dfs_fd *file, off_t offset)  in dfs_ramfs_lseek()  argument
156     if (offset <= (off_t)file->size)  in dfs_ramfs_lseek()
158         file->pos = offset;  in dfs_ramfs_lseek()
160         return file->pos;  in dfs_ramfs_lseek()
166 int dfs_ramfs_close(struct dfs_fd *file)  in dfs_ramfs_close()  argument
168     file->data = NULL;  in dfs_ramfs_close()
173 int dfs_ramfs_open(struct dfs_fd *file)  in dfs_ramfs_open()  argument
180     fs = (struct dfs_filesystem *)file->data;  in dfs_ramfs_open()
185     if (file->flags & O_DIRECTORY)  in dfs_ramfs_open()
187         if (file->flags & O_CREAT)  in dfs_ramfs_open()
193         dirent = dfs_ramfs_lookup(ramfs, file->path, &size);  in dfs_ramfs_open()
198             if (!(file->flags & O_DIRECTORY))  in dfs_ramfs_open()
206         dirent = dfs_ramfs_lookup(ramfs, file->path, &size);  in dfs_ramfs_open()
214             if (file->flags & O_CREAT || file->flags & O_WRONLY)  in dfs_ramfs_open()
218                 /* create a file entry */  in dfs_ramfs_open()
228                 name_ptr = file->path;  in dfs_ramfs_open()
245         /* Creates a new file.  in dfs_ramfs_open()
246          * If the file is existing, it is truncated and overwritten.  in dfs_ramfs_open()
248         if (file->flags & O_TRUNC)  in dfs_ramfs_open()
259     file->data = dirent;  in dfs_ramfs_open()
260     file->size = dirent->size;  in dfs_ramfs_open()
261     if (file->flags & O_APPEND)  in dfs_ramfs_open()
262         file->pos = file->size;  in dfs_ramfs_open()
264         file->pos = 0;  in dfs_ramfs_open()
293 int dfs_ramfs_getdents(struct dfs_fd *file,  in dfs_ramfs_getdents()  argument
302     dirent = (struct ramfs_dirent *)file->data;  in dfs_ramfs_getdents()
315     end = file->pos + count;  in dfs_ramfs_getdents()
322         if (index >= (rt_size_t)file->pos)  in dfs_ramfs_getdents()
331             file->pos += 1;  in dfs_ramfs_getdents()
414     /* register ram file system */  in dfs_ramfs_init()