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authorFlorin Coras <fcoras@cisco.com>2018-02-08 15:10:09 -0800
committerFlorin Coras <fcoras@cisco.com>2018-02-14 00:54:43 -0800
commitf8f516a8b0ccab2f5d9796f90419bf2661c750af (patch)
treef02f6c01ed1bf33aeb4ebb5714af470e537f87c2 /.clang-format
parent7758bf68a03a32f17c07154172157f5bdf30e684 (diff)
session: support local sessions and deprecate redirects
Memfd backed shared memory segments can only be negotiated over sockets. For such scenarios, the existing redirect mechanism that establishes cut-through sessions does not work anymore as the two peer application do not share such a socket. This patch adds support for local sessions, as opposed to sessions backed by a transport connection, in a way that is almost transparent to the two applications by reusing the existing binary api messages. Moreover, all segment allocations are now entirely done through the segment manager valloc, so segment overlaps due to independent allocations previously required for redirects are completely avoided. The one notable characteristic of local sessions (cut-through from app perspective) notification messages is that they carry pointers to two event queues, one for each app peer, instead of one. For transport-backed sessions one of the queues can be inferred but for local session they cannot. Change-Id: Ia443fb63e2d9d8e43490275062a708f039038175 Signed-off-by: Florin Coras <fcoras@cisco.com>
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