netdev - [PATCH net-next v2 0/3] MCTP flow support

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Date:   Fri, 29 Oct 2021 11:01:42 +0800
From:   Jeremy Kerr <jk@...econstruct.com.au>
To:     netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Matt Johnston <matt@...econstruct.com.au>,
        Andrew Jeffery <andrew@...id.au>
Subject: [PATCH net-next v2 0/3] MCTP flow support

For certain MCTP transport bindings, the binding driver will need to be
aware of request/response pairing. For example, the i2c binding may need
to set multiplexer configuration when expecting a response from a device
behind a mux.

This series implements a mechanism for informing the driver about these
flows, so it can implement transport-specific behaviour when a flow is
in progress (ie, a response is expected, and/or we time-out on that
expectation). We use a skb extension to notify the driver about the
presence of a flow, and a new dev->ops callback to notify about a flow's
destruction.

Cheers,

Jeremy

---
v2:
 - add cover letter
 - fix CONFIG combinations when MCTP_FLOWS=n

Jeremy Kerr (3):
  mctp: Return new key from mctp_alloc_local_tag
  mctp: Add flow extension to skb
  mctp: Pass flow data & flow release events to drivers

 include/linux/skbuff.h   |  3 ++
 include/net/mctp.h       | 13 +++++++
 include/net/mctpdevice.h | 16 ++++++++
 net/core/skbuff.c        | 19 +++++++++
 net/mctp/Kconfig         |  7 +++-
 net/mctp/device.c        | 51 ++++++++++++++++++++++++
 net/mctp/route.c         | 83 +++++++++++++++++++++++++++++++++-------
 7 files changed, 177 insertions(+), 15 deletions(-)

-- 
2.33.0