[PATCH net] ipv6:export nd_tbl

[PATCH net] ipv6:export nd_tbl

[Weiping Pan]

A customer wants to use nd_tbl in his kernel module,
the easiest way is to export nd_tbl, just as arp_tbl.

There were some requests to export nd_tbl, like:
http://marc.info/?l=netfilter-devel&m=111416950824614&w=2
http://marc.info/?l=linux-netdev&m=110715893206991&w=2

But they were all rejected.
I want to know the reason why can't nd_tbl be exported just as arp_tbl,
and how can we look up nd_tbl without exporting it.

thanks
Weiping Pan

Signed-off-by: Weiping Pan <panweiping3@gmail.com>
---
 net/ipv6/ndisc.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 0cb78d7..1ab98b5 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -153,6 +153,7 @@ struct neigh_table nd_tbl = {
 	.gc_thresh2 =	 512,
 	.gc_thresh3 =	1024,
 };
+EXPORT_SYMBOL(nd_tbl);
 
 /* ND options */
 struct ndisc_options {
-- 
1.7.4.4

Re: [PATCH net] ipv6:export nd_tbl

[David Miller]

From: Weiping Pan <panweiping3@gmail.com>
Date: Tue,  6 Dec 2011 14:52:41 +0800

> A customer wants to use nd_tbl in his kernel module,
> the easiest way is to export nd_tbl, just as arp_tbl.
> 
> There were some requests to export nd_tbl, like:
> http://marc.info/?l=netfilter-devel&m=111416950824614&w=2
> http://marc.info/?l=linux-netdev&m=110715893206991&w=2
> 
> But they were all rejected.
> I want to know the reason why can't nd_tbl be exported just as arp_tbl,
> and how can we look up nd_tbl without exporting it.
> 
> Signed-off-by: Weiping Pan <panweiping3@gmail.com>

We do not accomodate out-of-tree code, arp_tbl is exported because
modules (such as ATM clip) in the upstream tree use that symbol.