Re: [PATCH 25/30] NFS: SETCLIENTID truncates client ID and netid

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On Oct 8, 2008, at 1:56 PM, Trond Myklebust wrote:
On Wed, 2008-10-08 at 10:55 -0400, Chuck Lever wrote:
Just a note...

Peter Staubach (I think) suggested NFS4_SETCLIENTID_NAMELEN should be
a slightly smaller value to prevent the compiler from adding wasted
space in the structure to align these fields.

If nothing else, you can safely make NFS4_SETCLIENTID_NAMELEN 127
instead of 128.

Done...

Oh, in case you need it....

Acked-by: Chuck Lever <chuck.lever@xxxxxxxxxx>

---------------------------------------------------------------------
From: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
Date: Wed, 8 Oct 2008 13:54:52 -0400
NFS: Save padding bytes in struct nfs4_setclientid

Peter Staubach suggested reducing NFS4_SETCLIENTID_NAMELEN by one byte so
as to avoid 7 bytes of unnecessary padding.

Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
---

include/linux/nfs_xdr.h |    2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index f6e95bf..6ee6ae3 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -672,7 +672,7 @@ struct nfs4_rename_res {
	struct nfs_fattr *		new_fattr;
};

-#define NFS4_SETCLIENTID_NAMELEN	(128)
+#define NFS4_SETCLIENTID_NAMELEN	(127)
struct nfs4_setclientid {
	const nfs4_verifier *		sc_verifier;
	unsigned int			sc_name_len;


--
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust@xxxxxxxxxx
www.netapp.com

--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com
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