implement function to get a device by major and minor number

2 files changed, 25 insertions, 2 deletions

diff --git a/kernel/devices/src/storage/RAMDisk/RAMDiskController.cpp b/kernel/devices/src/storage/RAMDisk/RAMDiskController.cpp
index 90a7c0f..ec2cb97 100644
--- a/kernel/devices/src/storage/RAMDisk/RAMDiskController.cpp
+++ b/kernel/devices/src/storage/RAMDisk/RAMDiskController.cpp
@@ -3,12 +3,15 @@
 #include "kapi/boot_module/boot_module.hpp"
 #include "kapi/boot_module/boot_module_registry.hpp"
 
+#include "devices/BlockDevice.hpp"
 #include "devices/storage/RAMDisk/RAMDiskDevice.hpp"
 
 #include <kstd/print>
 
 #include <algorithm>
+#include <array>
 #include <cstddef>
+#include <cstdint>
 
 namespace devices::storage::ram_disk
 {
@@ -27,6 +30,18 @@ namespace devices::storage::ram_disk
     m_devices.at(0) = ram_disk_device{module};
   }
 
+  auto ram_disk_controller::device_by_major_minor(size_t major, size_t minor) -> block_device *
+  {
+    auto it = std::ranges::find_if(
+        m_devices, [major, minor](auto const & device) { return device.major() == major && device.minor() == minor; });
+
+    if (it != m_devices.end())
+    {
+      return &(*it);
+    }
+    return nullptr;
+  }
+
   auto ram_disk_controller::devices_count() -> size_t
   {
     return m_devices.size();
diff --git a/kernel/devices/src/storage/StorageManagement.cpp b/kernel/devices/src/storage/StorageManagement.cpp
index 2daae0a..cfc5239 100644
--- a/kernel/devices/src/storage/StorageManagement.cpp
+++ b/kernel/devices/src/storage/StorageManagement.cpp
@@ -8,6 +8,7 @@
 #include "devices/storage/StorageController.hpp"
 
 #include <algorithm>
+#include <cstddef>
 #include <optional>
 
 namespace devices::storage
@@ -47,9 +48,16 @@ namespace devices::storage
     m_controllers.at(0) = controller;  // TODO BA-FS26 use push_back from kstd:vector
   }
 
-  auto storage_management::add_device(block_device * device) -> void
+  auto storage_management::device_by_major_minor(size_t major, size_t minor) -> block_device *
   {
-    m_devices.at(0) = device;  // TODO BA-FS26 use push_back from kstd:vector
+    block_device * found = nullptr;
+
+    std::ranges::find_if(m_controllers, [&](auto const controller) {
+      found = controller->device_by_major_minor(major, minor);
+      return found != nullptr;
+    });
+
+    return found;
   }
 
 }  // namespace devices::storage
\ No newline at end of file