linux-kernel - [PATCH 1/2] knfsd: Fixed problem with NFS exporting directories which are mounted on.

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Date:	Wed,  5 Sep 2007 17:22:12 -0400
From:	"J. Bruce Fields" <bfields@...i.umich.edu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	nfs@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	Neil Brown <neilb@...e.de>,
	"J. Bruce Fields" <bfields@...i.umich.edu>
Subject: [PATCH 1/2] knfsd: Fixed problem with NFS exporting directories which are mounted on.

From: Neil Brown <neilb@...e.de>

Recent changes in NFSd cause a directory which is mounted-on
to not appear properly when the filesystem containing it is exported.

*exp_get* not returns -ENOENT rather than NULL and when
  commit 5d3dbbeaf56d0365ac6b5c0a0da0bd31cc4781e1
removed the NULL checks, it didn't add a check for -ENOENT.

Signed-off-by: Neil Brown <neilb@...e.de>
Signed-off-by: J. Bruce Fields <bfields@...i.umich.edu>
---
 fs/nfsd/vfs.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index a0c2b25..7867151 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -115,7 +115,8 @@ nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
 
 	exp2 = rqst_exp_get_by_name(rqstp, mnt, mounts);
 	if (IS_ERR(exp2)) {
-		err = PTR_ERR(exp2);
+		if (PTR_ERR(exp2) != -ENOENT)
+			err = PTR_ERR(exp2);
 		dput(mounts);
 		mntput(mnt);
 		goto out;
-- 
1.5.3

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