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Subject[PATCH 46/73] union-mount: Follow mount in __lookup_union() [ver #2]
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From: Valerie Aurora <vaurora@redhat.com>

In order for read-only layers of a union to have submounts, we have to
follow mounts on directories in union lookup.

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

fs/namei.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 3ac07be..37e32b4 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1195,6 +1195,8 @@ static int __lookup_union(struct nameidata *nd, struct qstr *name,
* layer's directory to the union stack for the topmost
* directory.
*/
+ follow_mount(&lower);
+
if (!topmost->dentry->d_inode) {
err = union_create_topmost_dir(&parent, name, topmost,
&lower);


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