82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/**
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* @file vfs.c
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* @author your name (you@domain.com)
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* @brief Implement the top-level virtual file system that supports multiple low-level file systems
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* @version 0.1
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* @date 2024-06-13
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*
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* @copyright Copyright (c) 2024
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*
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "vfs.h"
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#define MAX_FILE_SYSTEMS 4
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#define MAX_FILE_DESCRIPTORS 8
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#define MAX_DRIVES 8
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static file_system_t file_systems[MAX_FILE_SYSTEMS];
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static short file_system_count = 0;
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static v_file_desc_t file_descriptors[MAX_FILE_DESCRIPTORS];
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static short file_descriptor_count = 0;
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static v_drive_binding_t drive_bindings[MAX_DRIVES];
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static short drive_binding_count = 0;
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/**
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* @brief Intialize the virtual file system
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*
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* @return short 0 on success, any other number is an error
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*/
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short vfs_init() {
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// Clear out all the file descriptors
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for (short i = 0; i < MAX_FILE_DESCRIPTORS; i++) {
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file_descriptors[i].status = 0;
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file_descriptors[i].public_id = i;
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file_descriptors[i].local_id = 0;
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file_descriptors[i].file_system = 0;
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}
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return 0;
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}
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/**
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* @brief Register a file system with the virutal file system
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*
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* @param fs pointer to the file system driver
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* @return short 0 on success, any other number is an error
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*/
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short vfs_register_fs(file_system_p fs) {
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return 0;
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}
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/**
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* @brief Bind a drive name to a file system
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*
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* @param drive the name of the drive (e.g. "sd0", "fd1")
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* @param id the ID of the drive in the file system
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* @param fs the file system driver
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* @return short 0 on success, any other number is an error
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*/
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short vfs_bind_drive(const char * drive, short id, file_system_p fs) {
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return 0;
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}
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short fsys_close(short fd) {
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short result = 0;
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if (fd < MAX_FILE_DESCRIPTORS) {
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v_file_desc_p desc = &file_descriptors[fd];
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if (desc->status != 0) {
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result = desc->file_system->close(desc->local_id);
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desc->status = 0;
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desc->local_id = 0;
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desc->file_system = 0;
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}
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}
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return result;
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} |