From f2ca7153ca49a407ea1c7232c9fa7e9849f03f9c Mon Sep 17 00:00:00 2001
From: "J. Bruce Fields" <bfields@citi.umich.edu>
Date: Thu, 12 Nov 2009 17:26:19 -0500
Subject: nfsd: allow exports of symlinks

We want to allow exports of symlinks, to allow mountd to communicate to
the kernel which symlinks lead to exports, and hence which symlinks need
to be visible on the pseudofilesystem.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index c64d55f..18ac20f 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -358,10 +358,12 @@ static struct svc_export *svc_export_lookup(struct svc_export *);
 static int check_export(struct inode *inode, int flags, unsigned char *uuid)
 {
 
-	/* We currently export only dirs and regular files.
-	 * This is what umountd does.
+	/*
+	 * We currently export only dirs, regular files, and (for v4
+	 * pseudoroot) symlinks.
 	 */
 	if (!S_ISDIR(inode->i_mode) &&
+	    !S_ISLNK(inode->i_mode) &&
 	    !S_ISREG(inode->i_mode))
 		return -ENOTDIR;
 
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