VFS: Place new files in the correct subdirectory.

Oops, every new file was ending up in the root directory.
Also make sure we create the inode in the same FS as the parent directory.

VirtualFileSystem/VirtualFileSystem.cpp

@@ -169,8 +169,8 @@ RetainPtr<FileDescriptor> VFS::create(const String& path, int& error, int option
     }
 
     InodeIdentifier parent_dir;
-    auto existing_dir = resolve_path(path, base, error, 0, &parent_dir);
-    if (existing_dir.is_valid()) {
+    auto existing_file = resolve_path(path, base, error, 0, &parent_dir);
+    if (existing_file.is_valid()) {
         error = -EEXIST;
         return nullptr;
     }
@@ -182,7 +182,7 @@ RetainPtr<FileDescriptor> VFS::create(const String& path, int& error, int option
         return nullptr;
     }
     dbgprintf("VFS::create_file: '%s' in %u:%u\n", p.basename().characters(), parent_dir.fsid(), parent_dir.index());
-    auto new_file = base.fs()->create_inode(base.fs()->root_inode(), p.basename(), mode, 0, error);
+    auto new_file = parent_dir.fs()->create_inode(parent_dir, p.basename(), mode, 0, error);
     if (!new_file)
         return nullptr;