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From: Rick Macklem <rmacklem@FreeBSD.org>
Date: Sun, 1 May 2011 22:19:53 +0000 (UTC)
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Subject: svn commit: r221306 - in head/sys: fs/nfs nfs
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Author: rmacklem
Date: Sun May  1 22:19:52 2011
New Revision: 221306
URL: http://svn.freebsd.org/changeset/base/221306

Log:
  Add the kernel support needed to zero out the nfsstats
  structure for the new NFS subsystem. This will be used
  by nfsstats.c to implement the "-z" option.
  
  MFC after:	2 weeks

Modified:
  head/sys/fs/nfs/nfs_commonport.c
  head/sys/nfs/nfssvc.h

Modified: head/sys/fs/nfs/nfs_commonport.c
==============================================================================
--- head/sys/fs/nfs/nfs_commonport.c	Sun May  1 20:46:37 2011	(r221305)
+++ head/sys/fs/nfs/nfs_commonport.c	Sun May  1 22:19:52 2011	(r221306)
@@ -404,6 +404,8 @@ nfssvc_call(struct thread *p, struct nfs
 	} else if (uap->flag & NFSSVC_GETSTATS) {
 		error = copyout(&newnfsstats,
 		    CAST_USER_ADDR_T(uap->argp), sizeof (newnfsstats));
+		if ((uap->flag & NFSSVC_ZEROSTATS) != 0 && error == 0)
+			bzero(&newnfsstats, sizeof(newnfsstats));
 		return (error);
 	} else if (uap->flag & NFSSVC_NFSUSERDPORT) {
 		u_short sockport;

Modified: head/sys/nfs/nfssvc.h
==============================================================================
--- head/sys/nfs/nfssvc.h	Sun May  1 20:46:37 2011	(r221305)
+++ head/sys/nfs/nfssvc.h	Sun May  1 22:19:52 2011	(r221306)
@@ -64,5 +64,6 @@
 #define	NFSSVC_CBADDSOCK	0x00200000
 #define	NFSSVC_GETSTATS		0x00400000
 #define	NFSSVC_BACKUPSTABLE	0x00800000
+#define	NFSSVC_ZEROSTATS	0x01000000	/* modifier for GETSTATS */
 
 #endif /* _NFS_NFSSVC_H */