From 91095b7d087dd21069892a8ab596b2ccd00a92b0 Mon Sep 17 00:00:00 2001
From: Julien CLEMENT <julien.clement@epita.fr>
Date: Sat, 24 Dec 2022 16:49:35 +0100
Subject: [PATCH] working on ISO fs open

Signed-off-by: Julien CLEMENT <julien.clement@epita.fr>
---
 src/drivers/atapi/mod.rs |  3 +--
 src/fd/mod.rs            |  2 +-
 src/fs/iso/iso9660.rs    | 32 ++++++++++++++++----------------
 src/fs/iso/mod.rs        | 23 ++++++++++++++++++++++-
 src/fs/mod.rs            |  2 +-
 src/lib.rs               |  2 +-
 6 files changed, 42 insertions(+), 22 deletions(-)

diff --git a/src/drivers/atapi/mod.rs b/src/drivers/atapi/mod.rs
index 6a50729..4f0730a 100644
--- a/src/drivers/atapi/mod.rs
+++ b/src/drivers/atapi/mod.rs
@@ -58,8 +58,7 @@ static ATAPI_SIG: [u8; 4] = [
 ];
 
 lazy_static! {
-    pub static ref DRIVE: AsyncMutex<Option<ATABus>> =
-        { AsyncMutex::new(ATABus::discover_atapi_drive()) };
+    pub static ref DRIVE: AsyncMutex<Option<ATABus>> = AsyncMutex::new(ATABus::discover_atapi_drive());
 }
 
 pub async fn init() {
diff --git a/src/fd/mod.rs b/src/fd/mod.rs
index 4e91a0b..7aaec5e 100644
--- a/src/fd/mod.rs
+++ b/src/fd/mod.rs
@@ -9,7 +9,7 @@ use lazy_static::lazy_static;
 pub type FDt = Arc<RefCell<dyn FileDescriptor>>;
 
 lazy_static! {
-    pub static ref FD_TABLE: AsyncMutex<FDTable> = { AsyncMutex::new(FDTable::new()) };
+    pub static ref FD_TABLE: AsyncMutex<FDTable> = AsyncMutex::new(FDTable::new());
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
diff --git a/src/fs/iso/iso9660.rs b/src/fs/iso/iso9660.rs
index d3b42b7..663c03a 100644
--- a/src/fs/iso/iso9660.rs
+++ b/src/fs/iso/iso9660.rs
@@ -5,15 +5,15 @@ const ISO_BLOCK_SIZE: usize = 2048;
 #[repr(C, packed)]
 #[derive(Copy, Clone)]
 pub struct MultiEndian32 {
-    le: u32, // Little endian value
-    be: u32, // Big endian value
+    pub le: u32, // Little endian value
+    pub be: u32, // Big endian value
 }
 
 #[repr(C, packed)]
 #[derive(Copy, Clone)]
 pub struct MultiEndian16 {
-    le: u16, // Little endian value
-    be: u16, // Big endian value
+    pub le: u16, // Little endian value
+    pub be: u16, // Big endian value
 }
 
 // Path table structure
@@ -41,7 +41,7 @@ const ISO_DATE_LEN: usize = 7;
 
 #[repr(u8)]
 #[derive(Copy, Clone)]
-enum IsoFileType {
+pub enum IsoFileType {
     HIDDEN = 0x1,    // Hidden file
     ISDIR = 0x2,     // Directory
     ASSOCIAT = 0x4,  // Associated
@@ -53,20 +53,20 @@ enum IsoFileType {
 #[repr(C, packed)]
 #[derive(Copy, Clone)]
 pub struct IsoDir {
-    dir_size: u8,             // Length of directory record
-    ext_size: u8,             // Length of extended attribute record
-    data_blk: MultiEndian32,  // File data block index
-    file_size: MultiEndian32, // File size
-    date: [u8; ISO_DATE_LEN],
-    file_type: IsoFileType,
+    pub dir_size: u8,             // Length of directory record
+    pub ext_size: u8,             // Length of extended attribute record
+    pub data_blk: MultiEndian32,  // File data block index
+    pub file_size: MultiEndian32, // File size
+    pub date: [u8; ISO_DATE_LEN],
+    pub file_type: IsoFileType,
 
-    unit_size: u8,
-    gap_size: u8,
+    pub unit_size: u8,
+    pub gap_size: u8,
 
-    vol_seq: MultiEndian16,
+    pub vol_seq: MultiEndian16,
 
-    idf_len: u8,  // File name length
-    idf: [u8; 0], // File name
+    pub idf_len: u8,  // File name length
+    pub idf: [u8; 0], // File name
 }
 
 impl IsoDir {
diff --git a/src/fs/iso/mod.rs b/src/fs/iso/mod.rs
index 80a97ff..6336383 100644
--- a/src/fs/iso/mod.rs
+++ b/src/fs/iso/mod.rs
@@ -10,7 +10,7 @@ use super::FileSystem;
 use fd::IsoFD;
 use iso9660::{IsoDir, IsoPrimVolDesc};
 
-use alloc::{boxed::Box, sync::Arc};
+use alloc::{boxed::Box, sync::Arc, string::String, vec::Vec};
 use async_trait::async_trait;
 
 pub struct IsoFS {}
@@ -18,16 +18,37 @@ pub struct IsoFS {}
 #[async_trait(?Send)]
 impl FileSystem for IsoFS {
     async fn open(&mut self, path: &str, flags: u32) -> Option<FDt> {
+        // ISO is a read only file system
         if flags != crate::syscalls::io::O_RDONLY {
             return None;
         }
 
         let voldesc = get_prim_vol_desc().await;
 
+        // Invalid ISO
         if voldesc.std_identifier != "CD001".as_bytes() {
             return None;
         }
 
+        let root: IsoDir = voldesc.root_dir;
+        let curr_entry_block: [u8; 2048] = DRIVE
+            .lock()
+            .await
+            .as_mut()
+            .unwrap()
+            .read_block(root.data_blk.le)
+            .await;
+
+        let curr_entry: &IsoDir = unserialize(curr_entry_block.as_ptr());
+
+        let path_s: String = String::from(path);
+        let split_path: Vec<&str> = path_s
+            .split("/")
+            .filter(|p| p != &"")
+            .collect();
+
+        println!("{:?}", split_path);
+
         let fd = IsoFD::new();
         FD_TABLE.lock().await.register_fd(fd.clone());
         Some(fd.clone())
diff --git a/src/fs/mod.rs b/src/fs/mod.rs
index 8ab3b1f..e9f9d44 100644
--- a/src/fs/mod.rs
+++ b/src/fs/mod.rs
@@ -11,7 +11,7 @@ use lazy_static::lazy_static;
 pub type FSt = Arc<RefCell<dyn FileSystem>>;
 
 lazy_static! {
-    pub static ref VIRTUAL_FS: AsyncMutex<VirtualFS> = { AsyncMutex::new(VirtualFS::new()) };
+    pub static ref VIRTUAL_FS: AsyncMutex<VirtualFS> = AsyncMutex::new(VirtualFS::new());
 }
 
 #[async_trait(?Send)]
diff --git a/src/lib.rs b/src/lib.rs
index 70c4b6a..b050757 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -68,7 +68,7 @@ async fn get_file() {
     let fd = fs::VIRTUAL_FS
         .lock()
         .await
-        .open("test", syscalls::io::O_RDONLY)
+        .open("///boot///grub.cfg", syscalls::io::O_RDONLY)
         .await
         .unwrap();
     fd.borrow_mut().read(&[], 0).await;