[PATCH v1 net-next 00/15] ipv6: Drop RTNL from mcast.c and anycast.c

From: Kuniyuki Iwashima <kuniyu@google.com>

This is a prep series for RCU conversion of RTM_NEWNEIGH, which needs
RTNL during neigh_table.{pconstructor,pdestructor}() touching IPv6
multicast code.

Currently, IPv6 multicast code is protected by lock_sock() and
inet6_dev->mc_lock, and RTNL is not actually needed.

In addition, anycast code is also in the same situation and does not
need RTNL at all.

This series removes RTNL from net/ipv6/{mcast.c,anycast.c} and finally
removes setsockopt_needs_rtnl() from do_ipv6_setsockopt().


Kuniyuki Iwashima (15):
  ipv6: ndisc: Remove __in6_dev_get() in
    pndisc_{constructor,destructor}().
  ipv6: mcast: Replace locking comments with lockdep annotations.
  ipv6: mcast: Check inet6_dev->dead under idev->mc_lock in
    __ipv6_dev_mc_inc().
  ipv6: mcast: Remove mca_get().
  ipv6: mcast: Use in6_dev_get() in ipv6_dev_mc_dec().
  ipv6: mcast: Don't hold RTNL for IPV6_ADD_MEMBERSHIP and
    MCAST_JOIN_GROUP.
  ipv6: mcast: Don't hold RTNL for IPV6_DROP_MEMBERSHIP and
    MCAST_LEAVE_GROUP.
  ipv6: mcast: Don't hold RTNL in ipv6_sock_mc_close().
  ipv6: mcast: Don't hold RTNL for MCAST_ socket options.
  ipv6: Remove unnecessary ASSERT_RTNL and comment.
  ipv6: anycast: Don't use rtnl_dereference().
  ipv6: anycast: Don't hold RTNL for IPV6_LEAVE_ANYCAST and
    IPV6_ADDRFORM.
  ipv6: anycast: Unify two error paths in ipv6_sock_ac_join().
  ipv6: anycast: Don't hold RTNL for IPV6_JOIN_ANYCAST.
  ipv6: Remove setsockopt_needs_rtnl().

 include/linux/netdevice.h |   4 +-
 net/core/dev.c            |  30 ++--
 net/ipv6/addrconf.c       |  12 +-
 net/ipv6/anycast.c        |  92 ++++++-----
 net/ipv6/ipv6_sockglue.c  |  28 +---
 net/ipv6/mcast.c          | 321 +++++++++++++++++++-------------------
 net/ipv6/ndisc.c          |  10 +-
 7 files changed, 242 insertions(+), 255 deletions(-)

-- 
2.49.0