[PATCH v2 net-next 00/14] rtnetlink: Refactor rtnl_{new,del,set}link() for per-netns RTNL.

[Kuniyuki Iwashima <kuniyu@amazon.com>]

This is a prep for the next series where we will push RTNL down to
rtnl_{new,del,set}link().

That means, for example, __rtnl_newlink() is always under RTNL, but
rtnl_newlink() has a non-RTNL section.

As a prerequisite for per-netns RTNL, we will move netns validation
(and RTNL-independent validations if possible) to that section.

rtnl_link_ops and rtnl_af_ops will be protected with SRCU not to
depend on RTNL.


Changes:
  v2:
    * Add Eric's Reviewed-by to patch 1-4,6,8-11, (no tag on 5,7,12-14)
    * Patch 7
      * Handle error of init_srcu_struct().
      * Call cleanup_srcu_struct() after synchronize_srcu().
    * Patch 12
      * Move put_net() before errorout label
    * Patch 13
      * Newly added as prep for patch 14
    * Patch 14
      * Handle error of init_srcu_struct().
      * Call cleanup_srcu_struct() after synchronize_srcu().

  v1: https://lore.kernel.org/netdev/20241009231656.57830-1-kuniyu@amazon.com/


Kuniyuki Iwashima (14):
  rtnetlink: Allocate linkinfo[] as struct rtnl_newlink_tbs.
  rtnetlink: Call validate_linkmsg() in do_setlink().
  rtnetlink: Factorise do_setlink() path from __rtnl_newlink().
  rtnetlink: Move simple validation from __rtnl_newlink() to
    rtnl_newlink().
  rtnetlink: Move rtnl_link_ops_get() and retry to rtnl_newlink().
  rtnetlink: Move ops->validate to rtnl_newlink().
  rtnetlink: Protect struct rtnl_link_ops with SRCU.
  rtnetlink: Call rtnl_link_get_net_capable() in rtnl_newlink().
  rtnetlink: Fetch IFLA_LINK_NETNSID in rtnl_newlink().
  rtnetlink: Clean up rtnl_dellink().
  rtnetlink: Clean up rtnl_setlink().
  rtnetlink: Call rtnl_link_get_net_capable() in do_setlink().
  rtnetlink: Return int from rtnl_af_register().
  rtnetlink: Protect struct rtnl_af_ops with SRCU.

 include/net/rtnetlink.h |  12 +-
 net/bridge/br_netlink.c |   6 +-
 net/core/rtnetlink.c    | 567 ++++++++++++++++++++++------------------
 net/ipv4/devinet.c      |   3 +-
 net/ipv6/addrconf.c     |   5 +-
 net/mctp/device.c       |  16 +-
 net/mpls/af_mpls.c      |   5 +-
 7 files changed, 351 insertions(+), 263 deletions(-)

-- 
2.39.5 (Apple Git-154)