usb hubs, hotplug support, unplug support, saving log files to disk, smt

code/kernel/io_file.c

@@ -586,6 +586,33 @@ __declspec(dllexport) KSTATUS IoRegisterFilesystem(uint8_t volumeIndex,
     return STATUS_SUCCESS;
 }
 
+__declspec(dllexport) KSTATUS IoUnregisterFilesystem(uint8_t volumeIndex) {
+    if (volumeIndex >= MAX_DRIVES)
+        return STATUS_INVALID_PARAMETER;
+    if (!gVolumes[volumeIndex].Fs)
+        return STATUS_NOT_FOUND;
+
+    memset(&gVolumes[volumeIndex], 0, sizeof(gVolumes[volumeIndex]));
+    return STATUS_SUCCESS;
+}
+
+__declspec(dllexport) KSTATUS IoUnregisterFilesystemsForDisk(uint8_t diskIndex) {
+    KSTATUS last = STATUS_NOT_FOUND;
+    for (uint8_t i = 0; i < MAX_DRIVES; i++) {
+        if (gVolumes[i].Fs && gVolumes[i].Vol.DiskIndex == diskIndex) {
+            memset(&gVolumes[i], 0, sizeof(gVolumes[i]));
+            last = STATUS_SUCCESS;
+        }
+    }
+    return last;
+}
+
+__declspec(dllexport) bool IoFilesystemPresent(uint8_t volumeIndex) {
+    if (volumeIndex >= MAX_DRIVES)
+        return false;
+    return gVolumes[volumeIndex].Fs != (IO_FILESYSTEM*)0;
+}
+
 // ---------------------------------------------------------------------------
 // Destructor
 // ---------------------------------------------------------------------------