linux-kernel - [PATCH 49/73] union-mount: Call union lookup functions in lookup path [ver #2]

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Message-ID: <20120221180337.25235.66724.stgit@warthog.procyon.org.uk>
Date:	Tue, 21 Feb 2012 18:03:37 +0000
From:	David Howells <dhowells@...hat.com>
To:	linux-fsdevel@...r.kernel.org, viro@...IV.linux.org.uk,
	valerie.aurora@...il.com
Cc:	linux-kernel@...r.kernel.org, David Howells <dhowells@...hat.com>
Subject: [PATCH 49/73] union-mount: Call union lookup functions in lookup path
 [ver #2]

From: Valerie Aurora <vaurora@...hat.com>

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

Original-author: Valerie Aurora <vaurora@...hat.com>
Signed-off-by: David Howells <dhowells@...hat.com>
---

 fs/namei.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index c0adf4c..586913f 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1587,6 +1587,14 @@ retry:
 	}
 	if (err)
 		nd->flags |= LOOKUP_JUMPED;
+
+	if (needs_lookup_union(&nd->path, path)) {
+		int err = lookup_union(nd, name, path);
+		if (err < 0)
+			return err;
+#warning which inode?
+	}
+
 	*inode = path->dentry->d_inode;
 	return 0;
 }
@@ -2135,8 +2143,12 @@ static int lookup_hash(struct nameidata *nd, struct qstr *name,
 		path->dentry = NULL;
 		return PTR_ERR(result);
 	}
+
 	path->mnt = nd->path.mnt;
 	path->dentry = result;
+
+	if (needs_lookup_union(&nd->path, path))
+		return lookup_union_locked(nd, name, path);
 	return 0;
 }
 

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