linux-kernel - [RFC PATCH V6 1/7] ovl: setup overlayfs' private bdi

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Message-ID: <20211122030038.1938875-2-cgxu519@mykernel.net>
Date:   Mon, 22 Nov 2021 11:00:32 +0800
From:   Chengguang Xu <cgxu519@...ernel.net>
To:     miklos@...redi.hu, jack@...e.cz, amir73il@...il.com
Cc:     linux-unionfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Chengguang Xu <charliecgxu@...cent.com>
Subject: [RFC PATCH V6 1/7] ovl: setup overlayfs' private bdi

From: Chengguang Xu <charliecgxu@...cent.com>

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

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

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 265181c110ae..18a12088a37b 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1984,6 +1984,10 @@ 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;
+
 	err = -ENOMEM;
 	ofs->creator_cred = cred = prepare_creds();
 	if (!cred)
-- 
2.27.0