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cbfb8679dd
As it turns out MAX_HANDLE_SZ is a lie, the handle buffer we pass into name_to_handle_at() might need to be larger than MAX_HANDLE_SZ, and we thus need to invoke name_to_handle_at() in a loop, growing the buffer as needed. This adds a new wrapper name_to_handle_at_loop() around name_to_handle_at() that does the necessary looping, and ports over all users. Fixes: #7082