[PATCH 0/4] Define common macro NFS4_MAXTAGLEN for nfs/nfsd

[Kinglong Mee <kinglongmee@gmail.com>]

There are four macro defines for max tag length, 
in fs/nfs/nfs4xdr.c,
/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
#ifdef DEBUG
#define NFS4_MAXTAGLEN		20
#else
#define NFS4_MAXTAGLEN		0
#endif

in fs/nfs/callback_xdr.c,
#define CB_OP_TAGLEN_MAXSZ	(512)

in fs/nfsd/xdr4.h,
#define NFSD4_MAX_TAGLEN	128

in fs/nfsd/xdr4cb.h,
#define NFS4_MAXTAGLEN		20

But, according to rfc3530 and rfc5661, all the length should be
limited by opaque limited.

The patch site defines a common macro named NFS4_MAXTAGLEN for
all of them, limited to opaque limited.

Kinglong Mee (4):
  nfs: define NFS4_MAXTAGLEN to OPAQUE limits
  nfs: use NFS4_MAXTAGLEN for cb_taglen checking
  nfsd: use NFS4_MAXTAGLEN for nfsd taglen checking
  nfsd: use NFS4_MAXTAGLEN defined in include/linux/nfs4.h

 fs/nfs/callback_xdr.c | 5 ++---
 fs/nfs/nfs4xdr.c      | 7 -------
 fs/nfsd/nfs4xdr.c     | 2 +-
 fs/nfsd/xdr4.h        | 1 -
 fs/nfsd/xdr4cb.h      | 3 ++-
 include/linux/nfs4.h  | 1 +
 6 files changed, 6 insertions(+), 13 deletions(-)

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2.3.4