linux-kernel - [PATCH 23/38] union-mount: Call do_whiteout() on unlink and rmdir in unions

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Message-Id: <1281134124-17041-24-git-send-email-vaurora@redhat.com>
Date:	Fri,  6 Aug 2010 15:35:09 -0700
From:	Valerie Aurora <vaurora@...hat.com>
To:	Alexander Viro <viro@...iv.linux.org.uk>
Cc:	Miklos Szeredi <miklos@...redi.hu>, Jan Blunck <jblunck@...e.de>,
	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Valerie Aurora <vaurora@...hat.com>
Subject: [PATCH 23/38] 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 0821544..2d30a5b 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2596,6 +2596,10 @@ static long do_rmdir(int dfd, const char __user *pathname)
 	error = security_path_rmdir(&nd.path, path.dentry);
 	if (error)
 		goto exit4;
+	if (IS_DIR_UNIONED(nd.path.dentry)) {
+		error = do_whiteout(&nd, &path, 1);
+		goto exit4;
+	}
 	error = vfs_rmdir(nd.path.dentry->d_inode, path.dentry);
 exit4:
 	mnt_drop_write(nd.path.mnt);
@@ -2685,6 +2689,10 @@ static long do_unlinkat(int dfd, const char __user *pathname)
 		error = security_path_unlink(&nd.path, path.dentry);
 		if (error)
 			goto exit3;
+		if (IS_DIR_UNIONED(nd.path.dentry)) {
+			error = do_whiteout(&nd, &path, 0);
+			goto exit3;
+		}
 		error = vfs_unlink(nd.path.dentry->d_inode, path.dentry);
 exit3:
 		mnt_drop_write(nd.path.mnt);
-- 
1.6.3.3

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