rezize works part one

core/encryption_helper.sh

@@ -141,11 +141,23 @@ do_resize() {
         exit 1
     fi
     
-    log "Resizing LUKS volume."
-    cryptsetup resize "$mapper_name"
-    
-    log "Checking and resizing filesystem."
+    log "Checking filesystem before resize."
     e2fsck -fy "/dev/mapper/$mapper_name"
+
+    log "Resizing LUKS volume and filesystem."
+    # Re-authenticate for resize, as some cryptsetup versions require it.
+    if [ -n "$LUKSPASS" ]; then
+        log "Resizing with password."
+        echo -n "$LUKSPASS" | cryptsetup resize "$mapper_name" -
+    elif [ -n "$key_file_arg" ]; then
+        log "Resizing with keyfile."
+        cryptsetup resize "$mapper_name" --key-file "$key_file_arg"
+    else
+        # This should not happen if luksOpen succeeded.
+        # Fallback to the previous non-interactive attempt.
+        log "No password or keyfile for resize, trying non-interactively."
+        cryptsetup resize "$mapper_name" < /dev/null
+    fi
     resize2fs "/dev/mapper/$mapper_name"
 
     # 4. Mount it again

core/encryption_manager.py

@@ -177,9 +177,11 @@ class EncryptionManager:
         free_space = shutil.disk_usage(mount_point).free
         required_space = int(source_size * 1.10)
 
-        if required_space > free_space:
+        BUFFER = 4 * 1024 * 1024 * 1024  # 4 GB
+        # Trigger resize if projected free space is less than the buffer
+        if free_space - required_space < BUFFER:
             self.logger.log(
-                f"Resize needed for {profile_name}. Free: {free_space}, Required: {required_space}")
+                f"Resize needed for {profile_name}. Free: {free_space}, Required: {required_space}, Buffer: {BUFFER}")
             queue.put(
                 ('status_update', f"Container für {profile_name} zu klein. Vergrößere..."))
 
@@ -192,8 +194,11 @@ class EncryptionManager:
                 return None
 
             current_total = shutil.disk_usage(mount_point).total
-            needed_additional = required_space - free_space - \
-                (4 * 1024 * 1024 * 1024)  # (4 * 1024 * 1024 * 1024) = 4 GB
+
+            # How much space we need to add to meet the future demand and have the buffer left over.
+            # This is the deficit (required_space - free_space) plus the desired buffer.
+            needed_additional = (required_space - free_space) + BUFFER
+
             new_total_size = current_total + needed_additional
             new_total_size = math.ceil(new_total_size / 4096) * 4096