[00/10] pull request for net-next: batman-adv 2019-06-27 v2

  Hi David,

here is the updated feature/cleanup pull request of batman-adv for net-next
from yesterday. Your change suggestions have been integrated into Patch 6
of the series, everything else is unchanged.

Please pull or let me know of any problem!

Thank you,
      Simon

The following changes since commit a188339ca5a396acc588e5851ed7e19f66b0ebd9:

  Linux 5.2-rc1 (2019-05-19 15:47:09 -0700)

are available in the git repository at:

  git://git.open-mesh.org/linux-merge.git tags/batadv-next-for-davem-20190627v2

for you to fetch changes up to 11d458c1cb9b24ac899b1ec6284676f6b1914305:

  batman-adv: mcast: apply optimizations for routable packets, too (2019-06-27 19:25:05 +0200)

----------------------------------------------------------------
This feature/cleanup patchset includes the following patches:

 - bump version strings, by Simon Wunderlich

 - fix includes for _MAX constants, atomic functions and fwdecls,
   by Sven Eckelmann (3 patches)

 - shorten multicast tt/tvlv worker spinlock section, by Linus Luessing

 - routeable multicast preparations: implement MAC multicast filtering,
   by Linus Luessing (2 patches, David Millers comments integrated)

 - remove return value checks for debugfs_create, by Greg Kroah-Hartman

 - add routable multicast optimizations, by Linus Luessing (2 patches)

----------------------------------------------------------------
Greg Kroah-Hartman (1):
      batman-adv: no need to check return value of debugfs_create functions

Linus Lüssing (5):
      batman-adv: mcast: shorten multicast tt/tvlv worker spinlock section
      batman-adv: mcast: collect softif listeners from IP lists instead
      batman-adv: mcast: avoid redundant multicast TT entries with bridges
      batman-adv: mcast: detect, distribute and maintain multicast router presence
      batman-adv: mcast: apply optimizations for routable packets, too

Simon Wunderlich (1):
      batman-adv: Start new development cycle

Sven Eckelmann (3):
      batman-adv: Fix includes for *_MAX constants
      batman-adv: Add missing include for atomic functions
      batman-adv: Use includes instead of fwdecls

 include/uapi/linux/batadv_packet.h     |    8 +
 net/batman-adv/bat_algo.h              |    7 +-
 net/batman-adv/bat_v.c                 |    3 +-
 net/batman-adv/bat_v_elp.h             |    4 +-
 net/batman-adv/bat_v_ogm.h             |    3 +-
 net/batman-adv/bridge_loop_avoidance.h |    9 +-
 net/batman-adv/debugfs.c               |   99 +--
 net/batman-adv/debugfs.h               |    9 +-
 net/batman-adv/distributed-arp-table.h |    7 +-
 net/batman-adv/fragmentation.h         |    3 +-
 net/batman-adv/gateway_client.h        |    9 +-
 net/batman-adv/gateway_common.c        |    1 +
 net/batman-adv/gateway_common.h        |    3 +-
 net/batman-adv/hard-interface.c        |    7 +-
 net/batman-adv/hard-interface.h        |    5 +-
 net/batman-adv/hash.h                  |    3 +-
 net/batman-adv/icmp_socket.c           |   20 +-
 net/batman-adv/icmp_socket.h           |    5 +-
 net/batman-adv/log.c                   |   17 +-
 net/batman-adv/log.h                   |    1 +
 net/batman-adv/main.h                  |   12 +-
 net/batman-adv/multicast.c             | 1092 +++++++++++++++++++++++++-------
 net/batman-adv/multicast.h             |    6 +-
 net/batman-adv/netlink.c               |    4 +-
 net/batman-adv/netlink.h               |    3 +-
 net/batman-adv/network-coding.c        |   29 +-
 net/batman-adv/network-coding.h        |   14 +-
 net/batman-adv/originator.c            |    4 +-
 net/batman-adv/originator.h            |    7 +-
 net/batman-adv/routing.h               |    3 +-
 net/batman-adv/send.h                  |    3 +-
 net/batman-adv/soft-interface.c        |    6 +-
 net/batman-adv/soft-interface.h        |    7 +-
 net/batman-adv/sysfs.c                 |    1 +
 net/batman-adv/sysfs.h                 |    5 +-
 net/batman-adv/tp_meter.c              |    1 +
 net/batman-adv/tp_meter.h              |    3 +-
 net/batman-adv/translation-table.h     |    9 +-
 net/batman-adv/tvlv.h                  |    3 +-
 net/batman-adv/types.h                 |   69 +-
 40 files changed, 1041 insertions(+), 463 deletions(-)
  

From: Simon Wunderlich <sw@simonwunderlich.de>
Date: Fri, 28 Jun 2019 15:55:54 +0200

> here is the updated feature/cleanup pull request of batman-adv for net-next
> from yesterday. Your change suggestions have been integrated into Patch 6
> of the series, everything else is unchanged.
> 
> Please pull or let me know of any problem!

Pulled, thanks Simon.

I think that when you have the read_lock held, RCU is not necessary in order
to use __in6_dev_get() but I may be mistaken.  Just FYI...
  

On Friday, 28 June 2019 18:49:05 CEST David Miller wrote:
[...]
> I think that when you have the read_lock held, RCU is not necessary in order
> to use __in6_dev_get() but I may be mistaken.  Just FYI...

Problem is that the read_lock() can only be used after the __in6_dev_get() 
finished sucessfully. Because the read_lock's lock is stored in the inet6_dev 
object which was retrieved via __in6_dev_get. And the __in6_dev_get kerneldoc 
states [1] that you either have to hold RTNL or RCU (see also the 
rcu_dereference_rtnl call inside this function).

So we can only drop the rcu_read_lock when RTNL lock is held . I would guess 
now that this is not the case here - Linus' might want to correct me.

Kind regards,
	Sven

[1] https://lxr.missinglinkelectronics.com/linux/include/net/addrconf.h#L335