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[libvirt] the patch "bridge: export multicast database via netlink" broke kernel 3.8 uapi (was: Re: if_bridge.h: include in6.h for struct in6_addr use)



Eric Blake skrev 15.1.2013 01:57:
On 01/13/2013 01:05 PM, Thomas Backlund wrote:
Thomas Backlund skrev 13.1.2013 20:38:
patch both inline and attached as thunderbird tends to mess up ...

-----

if_bridge.h uses struct in6_addr ip6; but does not include the in6.h
header.

Found by trying to build libvirt and connman against 3.8-rc3 headers.


Ok,
ignore this patch, it's not the correct fix as it introduces
redefinitions...

Btw, the error that I hit that made me suggest this fix was libvirt
config check bailing out:

config.log:/usr/include/linux/if_bridge.h:173:20: error: field 'ip6' has
incomplete type

Hmm, just now noticing this thread, after independently hitting and and
having to work around the same problem in libvirt:
https://www.redhat.com/archives/libvir-list/2013-January/msg00930.html
https://bugzilla.redhat.com/show_bug.cgi?id=895141


Yep,

and the commit breaking uapi headers is by using "struct in6_addr ip6" is:


From ee07c6e7a6f8a25c18f0a6b18152fbd7499245f6 Mon Sep 17 00:00:00 2001
From: Cong Wang <amwang redhat com>
Date: Fri, 7 Dec 2012 00:04:48 +0000
Subject: [PATCH] bridge: export multicast database via netlink

V5: fix two bugs pointed out by Thomas
    remove seq check for now, mark it as TODO

V4: remove some useless #include
    some coding style fix

V3: drop debugging printk's
    update selinux perm table as well

V2: drop patch 1/2, export ifindex directly
    Redesign netlink attributes
    Improve netlink seq check
    Handle IPv6 addr as well

This patch exports bridge multicast database via netlink
message type RTM_GETMDB. Similar to fdb, but currently bridge-specific.
We may need to support modify multicast database too (RTM_{ADD,DEL}MDB).

(Thanks to Thomas for patient reviews)

Cc: Herbert Xu <herbert gondor apana org au>
Cc: Stephen Hemminger <shemminger vyatta com>
Cc: "David S. Miller" <davem davemloft net>
Cc: Thomas Graf <tgraf suug ch>
Cc: Jesper Dangaard Brouer <brouer redhat com>
Signed-off-by: Cong Wang <amwang redhat com>
Acked-by: Thomas Graf <tgraf suug ch>
Signed-off-by: David S. Miller <davem davemloft net>
---
 include/uapi/linux/if_bridge.h |   55 ++++++++++++++
 include/uapi/linux/rtnetlink.h |    3 +
 net/bridge/Makefile            |    2 +-
net/bridge/br_mdb.c | 163 ++++++++++++++++++++++++++++++++++++++++
 net/bridge/br_multicast.c      |    1 +
 net/bridge/br_private.h        |    1 +
 security/selinux/nlmsgtab.c    |    1 +
 7 files changed, 225 insertions(+), 1 deletions(-)
 create mode 100644 net/bridge/br_mdb.c

--
Thomas




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