[PATCH v1 net-next 0/9] phonet: Convert all doit() and dumpit() to RCU.

[Kuniyuki Iwashima <kuniyu@amazon.com>]

addr_doit() and route_doit() access only phonet_device_list(dev_net(dev))
and phonet_pernet(dev_net(dev))->routes, respectively.

Each per-netns struct has its dedicated mutex, and RTNL also protects
the structs.  __dev_change_net_namespace() has synchronize_net(), so
we have two options to convert addr_doit() and route_doit().

  1. Use per-netns RTNL
  2. Use RCU and convert each struct mutex to spinlock_t

As RCU is preferable, this series converts all PF_PHONET's doit()
and dumpit() to RCU.

4 doit()s and 1 dumpit() are now converted to RCU, 70 doit()s and
28 dumpit()s are still under RTNL.


Kuniyuki Iwashima (9):
  phonet: Pass ifindex to fill_addr().
  phonet: Pass net and ifindex to phonet_address_notify().
  phonet: Convert phonet_device_list.lock to spinlock_t.
  phonet: Don't hold RTNL for addr_doit().
  phonet: Don't hold RTNL for getaddr_dumpit().
  phonet: Pass ifindex to fill_route().
  phonet: Pass net and ifindex to rtm_phonet_notify().
  phonet: Convert phonet_routes.lock to spinlock_t.
  phonet: Don't hold RTNL for route_doit().

 include/net/phonet/pn_dev.h |   8 +--
 net/phonet/pn_dev.c         |  69 ++++++++++++++--------
 net/phonet/pn_netlink.c     | 115 ++++++++++++++++++++++--------------
 3 files changed, 120 insertions(+), 72 deletions(-)

-- 
2.39.5 (Apple Git-154)