From: Valerie Aurora <vaurora@xxxxxxxxxx>
Union mounts hook into the lookup path in two places: do_lookup() and
lookup_hash().
---
fs/namei.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/fs/namei.c b/fs/namei.c
index efd1937..4a01441 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1548,6 +1548,14 @@ retry:
path_put_conditional(path, nd);
return err;
}
+
+ if (needs_lookup_union(&nd->path, path)) {
+ int err = do_lookup_union(nd, name, path);
+ if (err < 0)
+ return err;
+#warning which inode?
+ }
+
*inode = path->dentry->d_inode;
return 0;
}
@@ -2029,8 +2037,12 @@ 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(nd, name, path);
return 0;
}
--
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