Re: [PATCH 2/4] Fix nfs4 umount to not used umount procedure

[Wei Yongjun <yjwei@nanjing-fnst.com>]

Fix a BUG of this patch, if mnt_server->pmap.pm_vers is not 1,2 and 3, 
return 1 to do actual umount.
> This fix umount.nfs4's BUG, patch cleanup some useless code.
>
> 1. Combine nfs3_umount() and nfs2_umount() to nfs_umount()
> 2. If it is a nfs4 remote file system or unkown mount version, do not 
> probe remote mount port and not send UMNT request wich is not necessary
>   
Signed-off-by: Wei Yongjun <yjwei@nanjing-fnst.com>

--- utils/mount/nfsumount.c.orig	2007-03-04 04:46:22.000000000 -0500
+++ utils/mount/nfsumount.c	2007-03-04 04:54:56.000000000 -0500
@@ -55,24 +55,11 @@
 extern int nfs_gethostbyname(const char *, struct sockaddr_in *);
 
 static inline enum clnt_stat
-nfs3_umount(dirpath *argp, CLIENT *clnt)
+nfs_umount(dirpath *argp, CLIENT *clnt)
 {
-	static char clnt_res;
-	memset (&clnt_res, 0, sizeof(clnt_res));
 	return clnt_call(clnt, MOUNTPROC_UMNT,
 			 (xdrproc_t) xdr_dirpath, (caddr_t)argp,
-			 (xdrproc_t) xdr_void, (caddr_t) &clnt_res,
-			 TIMEOUT);
-}
-
-static inline enum clnt_stat
-nfs2_umount(dirpath *argp, CLIENT *clnt)
-{
-	static char clnt_res;
-	memset (&clnt_res, 0, sizeof(clnt_res));
-	return clnt_call(clnt, MOUNTPROC_UMNT,
-			 (xdrproc_t) xdr_dirpath, (caddr_t)argp,
-			 (xdrproc_t) xdr_void, (caddr_t) &clnt_res,
+			 (xdrproc_t) xdr_void, NULL,
 			 TIMEOUT);
 }
 
@@ -82,25 +69,26 @@
 	enum clnt_stat res = 0;
 	int msock;
 
-	clnt = mnt_openclnt(mnt_server, &msock);
-	if (!clnt)
-		goto out_bad;
 	switch (mnt_server->pmap.pm_vers) {
 	case 3:
-		res = nfs3_umount(argp, clnt);
-		break;
 	case 2:
 	case 1:
-		res = nfs2_umount(argp, clnt);
+		if (!probe_mntport(mnt_server))
+			goto out_bad;
+		clnt = mnt_openclnt(mnt_server, &msock);
+		if (!clnt)
+			goto out_bad;
+		res = nfs_umount(argp, clnt);
+		mnt_closeclnt(clnt, msock);
+		if (res == RPC_SUCCESS)
+			return 1;
 		break;
 	default:
+		res = 1;
 		break;
 	}
-	mnt_closeclnt(clnt, msock);
-	if (res == RPC_SUCCESS)
-		return 1;
  out_bad:
-	return 0;
+	return res;
 }
 
 u_int get_mntproto(const char *);
@@ -303,8 +291,6 @@
 
 	if (!nfs_gethostbyname(hostname, &mnt_server.saddr))
 		goto out_bad;
-	if (!probe_mntport(&mnt_server))
-		goto out_bad;
 	return nfs_call_umount(&mnt_server, &dirname);
  out_bad:
 	printf("%s: %s: not found or not mounted\n", progname, spec);



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