[PATCH] knfsd cleanups

logics in nfsd_lookup() cleaned up (see above, only more so ;-/)

fs/nfsd/vfs.c

@@ -114,35 +114,30 @@ nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
 	if (isdotent(name, len)) {
 		if (len==1)
 			dentry = dget(dparent);
-		else  { /* must be ".." */
+		else if (dparent != exp->ex_dentry)
+			dentry = dget(dparent->d_parent);
+		else  if (!EX_CROSSMNT(exp))
+			dentry = dget(dparent); /* .. == . just like at / */
+		else {
 			/* checking mountpoint crossing is very different when stepping up */
-			if (dparent == exp->ex_dentry) {
-				if (!EX_CROSSMNT(exp))
-					dentry = dget(dparent); /* .. == . just like at / */
-				else
-				{
-					struct svc_export *exp2 = NULL;
-					struct dentry *dp;
-					struct vfsmount *mnt = mntget(exp->ex_mnt);
-					dentry = dget(dparent);
-					while(follow_up(&mnt, &dentry))
-						;
-					dp = dget(dentry->d_parent);
-					dput(dentry);
-					dentry = dp;
-					for ( ; exp2 == NULL && dp->d_parent != dp;
-					      dp=dp->d_parent)
-						exp2 = exp_get_by_name(exp->ex_client, mnt, dp);
-					if (exp2==NULL) {
-						dput(dentry);
-						dentry = dget(dparent);
-					} else {
-						exp = exp2;
-					}
-					mntput(mnt);
-				}
-			} else
-				dentry = dget(dparent->d_parent);
+			struct svc_export *exp2 = NULL;
+			struct dentry *dp;
+			struct vfsmount *mnt = mntget(exp->ex_mnt);
+			dentry = dget(dparent);
+			while(follow_up(&mnt, &dentry))
+				;
+			dp = dget(dentry->d_parent);
+			dput(dentry);
+			dentry = dp;
+			for ( ; !exp2 && dp->d_parent != dp; dp=dp->d_parent)
+				exp2 = exp_get_by_name(exp->ex_client, mnt, dp);
+			if (!exp2) {
+				dput(dentry);
+				dentry = dget(dparent);
+			} else {
+				exp = exp2;
+			}
+			mntput(mnt);
 		}
 	} else {
 		fh_lock(fhp);