Merge PR #26704 into master

Merge PR #26704 into master

* refs/pull/26704/head:
	msg/async, v2: drop alloc_aligned_buffer().
	msg/async, v2: introduce frame late abort facility.
	Revert "msg/async, v2: move ceph_msg_header2 to last frame segment."
	msg, msg/async, v2: introduce late message abort facility.
	msg/async, v2: failure of msg decode doesn't block throtlles.
	msg/async, v2: move ceph_msg_header2 to last frame segment.
	fixup: use frame epilogue for crc32 integrity checking.
	msg/async, v2: epilogue size is variable in secure mode.
	msg/async, v2: drop support for the buggy rx_buffers mechanism.
	Revert "msg/async, v2: add flags field to frame's epilogue."
	msg/async, v2: add flags field to frame's epilogue.
	msg/async, v2: drop onwire_segment_t as epilogue had derogated it.
	msg, msg/async, v2: drop crc fields from ceph_msg_header2.
	msg/async, v2: use frame epilogue for crc32 integrity checking.
	msg/async, v2: clean the ProtocolV2::{front,middle,data} up.
	msg/async, v2: clean the ProtocolV2::epilogue up.
	msg/async, v2: move crypto processing to segment reader.
	msg/async, v2: handle epilogue separately from payload/data.
	msg/async, v2: dissect decryption from SignedEncryptedFrame.
	msg/async, v2: unify WAIT frames with other payload frames.
	msg/async, v2: implement epilogue handling in secure mode.
	msg/async, v2: message frames are pre-dispatched now.

Reviewed-by: Sage Weil <sage@redhat.com>