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From: Rick Macklem <rmacklem@FreeBSD.org>
Date: Tue, 21 Jun 2011 19:58:29 +0000 (UTC)
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Subject: svn commit: r223373 - head/sys/fs/nfsserver
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Author: rmacklem
Date: Tue Jun 21 19:58:29 2011
New Revision: 223373
URL: http://svn.freebsd.org/changeset/base/223373

Log:
  Fix the new NFSv4 server so that it checks for VREAD_ACL when
  a client does a Getattr for an ACL and not VREAD_ATTRIBUTES.
  This was found during the recent NFSv4 interoperability Bakeathon.
  
  MFC after:	2 weeks

Modified:
  head/sys/fs/nfsserver/nfs_nfsdserv.c

Modified: head/sys/fs/nfsserver/nfs_nfsdserv.c
==============================================================================
--- head/sys/fs/nfsserver/nfs_nfsdserv.c	Tue Jun 21 19:34:57 2011	(r223372)
+++ head/sys/fs/nfsserver/nfs_nfsdserv.c	Tue Jun 21 19:58:29 2011	(r223373)
@@ -172,11 +172,12 @@ nfsrvd_getattr(struct nfsrv_descript *nd
 	fhandle_t fh;
 	int at_root = 0, error = 0, supports_nfsv4acls;
 	struct nfsreferral *refp;
-	nfsattrbit_t attrbits;
+	nfsattrbit_t attrbits, tmpbits;
 	struct mount *mp;
 	struct vnode *tvp = NULL;
 	struct vattr va;
 	uint64_t mounted_on_fileno = 0;
+	accmode_t accmode;
 
 	if (nd->nd_repstat)
 		return (0);
@@ -197,11 +198,20 @@ nfsrvd_getattr(struct nfsrv_descript *nd
 			vput(vp);
 			return (0);
 		}
-		if (!nd->nd_repstat)
-			nd->nd_repstat = nfsvno_accchk(vp,
-			    VREAD_ATTRIBUTES,
-			    nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
-			    NFSACCCHK_VPISLOCKED, NULL);
+		if (nd->nd_repstat == 0) {
+			accmode = 0;
+			NFSSET_ATTRBIT(&tmpbits, &attrbits);
+			if (NFSISSET_ATTRBIT(&tmpbits, NFSATTRBIT_ACL)) {
+				NFSCLRBIT_ATTRBIT(&tmpbits, NFSATTRBIT_ACL);
+				accmode |= VREAD_ACL;
+			}
+			if (NFSNONZERO_ATTRBIT(&tmpbits))
+				accmode |= VREAD_ATTRIBUTES;
+			if (accmode != 0)
+				nd->nd_repstat = nfsvno_accchk(vp, accmode,
+				    nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
+				    NFSACCCHK_VPISLOCKED, NULL);
+		}
 	}
 	if (!nd->nd_repstat)
 		nd->nd_repstat = nfsvno_getattr(vp, &nva, nd->nd_cred, p, 1);