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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250616233417.1153427-1-kuni1840@gmail.com>
Date: Mon, 16 Jun 2025 16:28:29 -0700
From: Kuniyuki Iwashima <kuni1840@...il.com>
To: "David S. Miller" <davem@...emloft.net>,
	David Ahern <dsahern@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: Simon Horman <horms@...nel.org>,
	Kuniyuki Iwashima <kuniyu@...gle.com>,
	Kuniyuki Iwashima <kuni1840@...il.com>,
	netdev@...r.kernel.org
Subject: [PATCH v1 net-next 00/15] ipv6: Drop RTNL from mcast.c and anycast.c

From: Kuniyuki Iwashima <kuniyu@...gle.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