linux-kernel - [PATCH 34/34] union-mount: Call union lookup functions in lookup path

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Date:	Thu, 16 Sep 2010 15:12:25 -0700
From:	Valerie Aurora <vaurora@...hat.com>
To:	Alexander Viro <viro@...iv.linux.org.uk>
Cc:	Miklos Szeredi <miklos@...redi.hu>,
	Christoph Hellwig <hch@...radead.org>,
	Andreas Gruenbacher <agruen@...e.de>,
	Nick Piggin <npiggin@...nel.dk>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, Valerie Aurora <vaurora@...hat.com>
Subject: [PATCH 34/34] union-mount: Call union lookup functions in lookup path

Union mounts hook into the lookup path in two places: do_lookup() and
lookup_hash().

Signed-off-by: Valerie Aurora <vaurora@...hat.com>
---
 fs/namei.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 7656442..bbce934 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -931,6 +931,11 @@ done:
 	path->mnt = mnt;
 	path->dentry = dentry;
 	__follow_mount(path);
+	if (needs_lookup_union(&nd->path, path)) {
+		int err = do_lookup_union(nd, name, path);
+		if (err < 0)
+			return err;
+	}
 	return 0;
 
 need_lookup:
@@ -1402,8 +1407,13 @@ static int lookup_hash(struct nameidata *nd, struct qstr *name,
 		err = PTR_ERR(path->dentry);
 		path->dentry = NULL;
 		path->mnt = NULL;
+		return err;
 	}
+
+	if (needs_lookup_union(&nd->path, path))
+		err = lookup_union(nd, name, path);
 	return err;
+
 }
 
 static int __lookup_one_len(const char *name, struct qstr *this,
-- 
1.6.3.3

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