[PATCH v2 02/10] ovl: make the root inode appear hashed

[Josef Bacik <josef@toxicpanda.com>]

__mark_inode_dirty() does not put an unhashed inode on a dirty list, and
the root inode of an overlay is never hashed.  Use inode_fake_hash() on it,
so that the following patches can track it like any other overlay inode.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 fs/overlayfs/super.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index ce3e30235ae9..f0ca1539022d 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1366,6 +1366,11 @@ static struct dentry *ovl_get_root(struct super_block *sb,
 	ovl_dentry_set_flag(OVL_E_CONNECTED, root);
 	ovl_set_upperdata(d_inode(root));
 	ovl_inode_init(d_inode(root), &oip, ino, fsid);
+	/*
+	 * Nobody looks the root up by its hash, but __mark_inode_dirty() only
+	 * puts hashed inodes on a dirty list.
+	 */
+	inode_fake_hash(d_inode(root));
 	WARN_ON(!!IS_CASEFOLDED(d_inode(root)) != ofs->casefold);
 	ovl_dentry_init_flags(root, upperdentry, oe, DCACHE_OP_WEAK_REVALIDATE);
 	/* root keeps a reference of upperdentry */

-- 
2.55.0