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added num_dir_entries & directory_file_size in filesys.rs

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This commit is contained in:
Baptiste 2023-03-29 16:53:08 +02:00
parent d620822d97
commit 4633c512bd
1 changed files with 15 additions and 13 deletions
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28
src/filesys/filesys.rs
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@ -2,9 +2,11 @@ use crate::{simulator::disk, utility::bitmap::BitMap, kernel::mgerror::ErrorCode
use super::filehdr::FileHdr;
const ERROR : i32 = -1;
const FREE_MAP_SECTOR : i32 = 0;
const DIRECTORY_SECTOR : i32 = 1;
pub const ERROR : i32 = -1;
pub const FREE_MAP_SECTOR : i32 = 0;
pub const DIRECTORY_SECTOR : i32 = 1;
pub const NUM_DIR_ENTRIES : i32 = 10;
pub const DIRECTORY_FILE_SIZE : i32 = 100; //std::mem::size_of<Directory>() * NUM_DIR_ENTRIES;
pub struct Filesys {
pub free_map_file : OpenFile, //Bit map of free disk blocks, represented as a file
@ -27,7 +29,7 @@ impl Filesys {
pub fn init_filesys(format : bool) -> Filesys {
if format {
let free_map = BitMap::init_bitmap(disk::NUM_SECTORS as usize);
let directory = Directory::init_directory(num_dir_entries);
let directory = Directory::init_directory(NUM_DIR_ENTRIES);
free_map.mark(FREE_MAP_SECTOR as usize);
free_map.mark(DIRECTORY_SECTOR as usize);
@ -36,7 +38,7 @@ impl Filesys {
let dir_header : FileHdr;
map_header.allocate(free_map, FREE_MAP_SECTOR);
dir_header.allocate(free_map, directory_file_size);
dir_header.allocate(free_map, DIRECTORY_FILE_SIZE);
dir_header.set_dir();
@ -97,7 +99,7 @@ impl Filesys {
}
let dir_file = OpenFile::init_open_file(dir_sector);
let directory = Directory::init_directory(num_dir_entries);
let directory = Directory::init_directory(NUM_DIR_ENTRIES);
directory.fetch_from(&dir_file);
if directory.find(name) != ERROR {
@ -163,7 +165,7 @@ impl Filesys {
// Read the directory from disk
let dir_file = OpenFile::init_open_file(dir_sector);
let directory = Directory::init_directory(num_dir_entries);
let directory = Directory::init_directory(NUM_DIR_ENTRIES);
directory.fetch_from(&directory);
// Find the file in the directory
@ -201,7 +203,7 @@ impl Filesys {
// Fetch the directory from the disk
let dir_file = OpenFile::init_open_file(dir_sector);
let directory = Directory::init_directory(num_dir_entries);
let directory = Directory::init_directory(NUM_DIR_ENTRIES);
directory.fetch_from(&dir_file);
// Look for the file in the directory
@ -283,7 +285,7 @@ impl Filesys {
// Fetch it from disk
let parent_dir_file = OpenFile::init_open_file(parent_sector);
let parent_dir = Directory::init_directory(num_dir_entries);
let parent_dir = Directory::init_directory(NUM_DIR_ENTRIES);
parent_dir.fetch_from(parent_dir_file);
// Check that the directory does not exit yet
@ -303,7 +305,7 @@ impl Filesys {
// Allocate free sectors for the directory contents
let hdr : FileHdr;
if !hdr.allocate(free_map, directory_file_size) {
if !hdr.allocate(free_map, DIRECTORY_FILE_SIZE) {
return Err(ErrorCode::OutOfDisk);
}
@ -322,7 +324,7 @@ impl Filesys {
// New directory (initially empty)
let new_dir_file = OpenFile::init_open_file(hdr_sector as usize);
let new_dir = Directory::init_directory(num_dir_entries);
let new_dir = Directory::init_directory(NUM_DIR_ENTRIES);
new_dir.write_back(new_dir_file);
// Parent directory
@ -354,7 +356,7 @@ impl Filesys {
// Fetch it from disk
let parent_dir_file = OpenFile::init_open_file(parent_sector);
let parent_dir = Directory::init_directory(num_dir_entries);
let parent_dir = Directory::init_directory(NUM_DIR_ENTRIES);
parent_dir.fetch_from(parent_dir_file);
// Check that the directory to be removed exist
@ -374,7 +376,7 @@ impl Filesys {
// Fetch its contents from the disk
let the_dir_file = OpenFile::init_open_file(the_dir_sector);
let the_dir = Directory::init_directory(num_dir_entries);
let the_dir = Directory::init_directory(NUM_DIR_ENTRIES);
the_dir.fetch_from(the_dir_file);
// Check that is is empty