From f4babecc6d72aae688ad85fc726e22dbd1f82219 Mon Sep 17 00:00:00 2001
From: Amlal El Mahrouss <amlal@nekernel.org>
Date: Mon, 26 May 2025 20:29:57 +0200
Subject: feat!: Add IFS layer within DriveMgr, and IFS API.

also:

 - Use ThreadID in AP system.
 - Refactor kernel according to new IFS layer.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>
---
 dev/kernel/src/IFS.cc | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 dev/kernel/src/IFS.cc

(limited to 'dev/kernel/src/IFS.cc')

diff --git a/dev/kernel/src/IFS.cc b/dev/kernel/src/IFS.cc
new file mode 100644
index 00000000..ba2ec8c0
--- /dev/null
+++ b/dev/kernel/src/IFS.cc
@@ -0,0 +1,89 @@
+/* -------------------------------------------
+
+  Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+#include <KernelKit/DriveMgr.h>
+#include <KernelKit/FileMgr.h>
+
+/*************************************************************
+ *
+ * File: IFS.cc
+ * Purpose: Filesystem to mountpoint interface.
+ * Date: 05/26/2025
+ *
+ * Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
+ *
+ *************************************************************/
+
+/// Useful macros regarding the IFS.
+
+#define fsi_ifs_write(DRV, TRAITS, MP) (MP->DRV()).fOutput(TRAITS)
+#define fsi_ifs_read(DRV, TRAITS, MP) (MP->DRV()).fInput(TRAITS)
+
+namespace Kernel {
+/// @brief Read from fs disk.
+/// @param Mnt mounted interface.
+/// @param DrvTrait drive info
+/// @param DrvIndex drive index.
+/// @return
+Int32 fs_ifs_read(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvIndex) {
+  if (!Mnt) return kErrorDisk;
+
+  DrvTrait.fPacket.fPacketGood = false;
+
+  switch (DrvIndex) {
+    case MountpointInterface::kDriveIndexA: {
+      fsi_ifs_read(A, DrvTrait.fPacket, Mnt);
+      break;
+    }
+    case MountpointInterface::kDriveIndexB: {
+      fsi_ifs_read(B, DrvTrait.fPacket, Mnt);
+      break;
+    }
+    case MountpointInterface::kDriveIndexC: {
+      fsi_ifs_read(C, DrvTrait.fPacket, Mnt);
+      break;
+    }
+    case MountpointInterface::kDriveIndexD: {
+      fsi_ifs_read(D, DrvTrait.fPacket, Mnt);
+      break;
+    }
+  }
+
+  return DrvTrait.fPacket.fPacketGood ? kErrorSuccess : kErrorDisk;
+}
+
+/// @brief Write to fs disk.
+/// @param Mnt mounted interface.
+/// @param DrvTrait drive info
+/// @param DrvIndex drive index.
+/// @return
+Int32 fs_ifs_write(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvIndex) {
+  if (!Mnt) return kErrorDisk;
+
+  DrvTrait.fPacket.fPacketGood = false;
+
+  switch (DrvIndex) {
+    case MountpointInterface::kDriveIndexA: {
+      fsi_ifs_write(A, DrvTrait.fPacket, Mnt);
+      break;
+    }
+    case MountpointInterface::kDriveIndexB: {
+      fsi_ifs_write(B, DrvTrait.fPacket, Mnt);
+      break;
+    }
+    case MountpointInterface::kDriveIndexC: {
+      fsi_ifs_write(C, DrvTrait.fPacket, Mnt);
+      break;
+    }
+    case MountpointInterface::kDriveIndexD: {
+      fsi_ifs_write(D, DrvTrait.fPacket, Mnt);
+      break;
+    }
+  }
+
+  return DrvTrait.fPacket.fPacketGood ? kErrorSuccess : kErrorDisk;
+}
+}  // namespace Kernel
\ No newline at end of file
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