NewInMessage creates a new InMessage with its storage initialized.

The maximum read size that we expect to ever see from the kernel, used for calculating the size of out messages.

The maximum fuse write request size that InMessage can acommodate.

OutMessageHeaderSize is the size of the leading header in every properly-constructed OutMessage.

An incoming message from the kernel, including leading fusekernel.InHeader struct.

OutMessage provides a mechanism for constructing a single contiguous fuse message from multiple segments, where the first segment is always a fusekernel.OutHeader message.