[RFC PATCH v2 1/8] ovl: setup overlayfs' private bdi

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Setup overlayfs' private bdi so that we can collect
overlayfs' own dirty inodes.

Signed-off-by: Chengguang Xu <cgxu519@xxxxxxxxxxxx>
---
 fs/overlayfs/super.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 290983bcfbb3..d1e546abce87 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1869,6 +1869,10 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
 	if (!ofs)
 		goto out;
 
+	err = super_setup_bdi(sb);
+	if (err)
+		goto out_err;
+
 	ofs->creator_cred = cred = prepare_creds();
 	if (!cred)
 		goto out_err;
-- 
2.26.2






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