[NFS] Nfs4 over Ipv6 patch to fix ipv6 subnetting in /etc/exports

[Kelly Anderson <kelly-lACMDn57031vQQPgy9v2K1aTQe2KTcn/@public.gmane.org>]

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Hopefully this mail gets through to someone who can apply this patch to 
NfsUtils git.

I have been trying on and off for a year or so to get Nfs4 mounts to 
work over Ipv6.  Finally with the latest git it seemed to work.  That 
is, it worked when you wildcard all internet addresses.

/home/nfs4  *(rw,fsid=0,sync,root_squash,no_all_squash,no_subtree_check)

Unfortunately subnetting wasn't working, so I dug into the code to 
figure out why.  It turned out that it was something simple (once I 
managed to get my head into the code).  I've attached a patch against 
the current git that fixes it.  With the patch applied, ipv6 subnetting 
such as the following works.

/home/nfs4  
2001:470:b:3e::/64(rw,fsid=0,sync,root_squash,no_all_squash,no_subtree_check)
/home/nfs4  
2001:470:b:3e::/ffff:ffff:ffff:ffff::(rw,fsid=0,sync,root_squash,no_all_squash,no_subtree_check)

Regards,

Kelly Anderson

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--- ./support/export/client.c.orig	2009-11-30 08:06:18.000000000 -0700
+++ ./support/export/client.c	2009-12-02 15:16:55.361725808 -0700
@@ -505,16 +505,16 @@ check_subnet_v6(const struct sockaddr_in
 			continue;
 
 		if (mask_match(address->sin6_addr.s6_addr32[0],
-				sin6->sin6_addr.s6_addr[0],
+				sin6->sin6_addr.s6_addr32[0],
 		      		mask->sin6_addr.s6_addr32[0]) &&
 		    mask_match(address->sin6_addr.s6_addr32[1],
-				sin6->sin6_addr.s6_addr[1],
+				sin6->sin6_addr.s6_addr32[1],
 		      		mask->sin6_addr.s6_addr32[1]) &&
 		    mask_match(address->sin6_addr.s6_addr32[2],
-				sin6->sin6_addr.s6_addr[2],
+				sin6->sin6_addr.s6_addr32[2],
 		      		mask->sin6_addr.s6_addr32[2]) &&
 		    mask_match(address->sin6_addr.s6_addr32[3],
-				sin6->sin6_addr.s6_addr[3],
+				sin6->sin6_addr.s6_addr32[3],
 		      		mask->sin6_addr.s6_addr32[3]))
 			return 1;
 	}

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