linux-kernel - [PATCH 5/6] union-mount: Call do_whiteout() on unlink and rmdir in unions

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Message-Id: <1267567889-4637-6-git-send-email-vaurora@redhat.com>
Date:	Tue,  2 Mar 2010 14:11:28 -0800
From:	Valerie Aurora <vaurora@...hat.com>
To:	Alexander Viro <viro@...iv.linux.org.uk>,
	Christoph Hellwig <hch@...radead.org>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jan Blunck <jblunck@...e.de>,
	Valerie Aurora <vaurora@...hat.com>
Subject: [PATCH 5/6] union-mount: Call do_whiteout() on unlink and rmdir in unions

From: Jan Blunck <jblunck@...e.de>

Call do_whiteout() when removing files and directories from a union
mounted file system.

Signed-off-by: Valerie Aurora <vaurora@...hat.com>
---
 fs/namei.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 85d95fc..9797074 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2670,6 +2670,10 @@ static long do_rmdir(int dfd, const char __user *pathname)
 	error = mnt_want_write(nd.path.mnt);
 	if (error)
 		goto exit3;
+	if (IS_UNIONED_DIR(&nd.path)) {
+		error = do_whiteout(&nd, &path, 1);
+		goto exit4;
+	}
 	error = security_path_rmdir(&nd.path, path.dentry);
 	if (error)
 		goto exit4;
@@ -2758,6 +2762,10 @@ static long do_unlinkat(int dfd, const char __user *pathname)
 		error = mnt_want_write(nd.path.mnt);
 		if (error)
 			goto exit2;
+		if (IS_UNIONED_DIR(&nd.path)) {
+			error = do_whiteout(&nd, &path, 0);
+			goto exit3;
+		}
 		error = security_path_unlink(&nd.path, path.dentry);
 		if (error)
 			goto exit3;
-- 
1.5.6.5

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