io_uring write_some_at writes at wrong offset

[JoelKatz]

In io_uring_descriptor_service.hpp we have:

      return descriptor_ops::sync_write_at1(impl.descriptor_,
          offset, impl.state_, bufs_type::first(buffers).data(),
          bufs_type::first(buffers).size(), ec);

But in descriptor_ops.ipp we have:

std::size_t sync_write_at1(int d, state_type state, uint64_t offset,
    const void* data, std::size_t size, boost::system::error_code& ec)

The observed symptom is that writes using write_some_at write to a constant and incorrect offset. Reversing the offset and state parameters in io_uring_descriptor_service.hpp fixes the symptom. I'm not confident that's the correct fix though and this same issue may be present in related code paths.

[ljhaoge]

Excuse me (t.radarlab.org) When can I log in