linux-kernel - [RFC PATCH v5 03/10] ovl: implement overlayfs' ->evict

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Message-ID: <20210923130814.140814-4-cgxu519@mykernel.net>
Date:   Thu, 23 Sep 2021 21:08:07 +0800
From:   Chengguang Xu <cgxu519@...ernel.net>
To:     miklos@...redi.hu, jack@...e.cz, amir73il@...il.com
Cc:     linux-fsdevel@...r.kernel.org, linux-unionfs@...r.kernel.org,
        linux-kernel@...r.kernel.org, Chengguang Xu <cgxu519@...ernel.net>
Subject: [RFC PATCH v5 03/10] ovl: implement overlayfs' ->evict_inode operation

Implement overlayfs' ->evict_inode operation,
so that we can clear dirty flags of overlayfs inode.

Signed-off-by: Chengguang Xu <cgxu519@...ernel.net>
---
 fs/overlayfs/super.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 51886ba6130a..2ab77adf7256 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -406,11 +406,18 @@ static int ovl_remount(struct super_block *sb, int *flags, char *data)
 	return ret;
 }
 
+static void ovl_evict_inode(struct inode *inode)
+{
+	inode->i_state &= ~I_DIRTY_ALL;
+	clear_inode(inode);
+}
+
 static const struct super_operations ovl_super_operations = {
 	.alloc_inode	= ovl_alloc_inode,
 	.free_inode	= ovl_free_inode,
 	.destroy_inode	= ovl_destroy_inode,
 	.drop_inode	= generic_delete_inode,
+	.evict_inode	= ovl_evict_inode,
 	.put_super	= ovl_put_super,
 	.sync_fs	= ovl_sync_fs,
 	.statfs		= ovl_statfs,
-- 
2.27.0