linux-kernel - [RFC PATCH V6 4/7] ovl: set 'DONTCACHE' flag for overlayfs inode

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Message-ID: <20211122030038.1938875-5-cgxu519@mykernel.net>
Date:   Mon, 22 Nov 2021 11:00:35 +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 4/7] ovl: set 'DONTCACHE' flag for overlayfs inode

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

Set 'DONTCACHE' flag to overlayfs inode so that
upper inode to be always synced before eviction.

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

diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 027ffc0a2539..c4472299d5df 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -791,6 +791,7 @@ void ovl_inode_init(struct inode *inode, struct ovl_inode_params *oip,
 	ovl_copyattr(realinode, inode);
 	ovl_copyflags(realinode, inode);
 	ovl_map_ino(inode, ino, fsid);
+	d_mark_dontcache(inode);
 }
 
 static void ovl_fill_inode(struct inode *inode, umode_t mode, dev_t rdev)
-- 
2.27.0