netdev - [PATCH net-next 0/3] inet: implement lockless RTM

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Message-ID: <20240227092411.2315725-1-edumazet@google.com>
Date: Tue, 27 Feb 2024 09:24:08 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: David Ahern <dsahern@...nel.org>, Jiri Pirko <jiri@...dia.com>, netdev@...r.kernel.org, 
	eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 0/3] inet: implement lockless RTM_GETNETCONF ops

This series removes RTNL use for RTM_GETNETCONF operations on AF_INET.

- Annotate data-races to avoid possible KCSAN splats.

- "ip -4 netconf show dev XXX" can be implemented without RTNL [1]

- "ip -4 netconf" dumps can be implemented using RCU instead of RTNL [1]

[1] This only refers to RTM_GETNETCONF operation, "ip" command
    also uses RTM_GETLINK dumps which are using RTNL at this moment.

Eric Dumazet (3):
  inet: annotate devconf data-races
  inet: do not use RTNL in inet_netconf_get_devconf()
  inet: use xa_array iterator to implement inet_netconf_dump_devconf()

 include/linux/inetdevice.h |  14 ++--
 net/ipv4/devinet.c         | 147 +++++++++++++++++--------------------
 net/ipv4/igmp.c            |   4 +-
 net/ipv4/proc.c            |   2 +-
 net/ipv4/route.c           |   4 +-
 5 files changed, 81 insertions(+), 90 deletions(-)

-- 
2.44.0.rc1.240.g4c46232300-goog