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From:   Miklos Szeredi <mszeredi@redhat.com>
To:     linux-unionfs@vger.kernel.org
Cc:     linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 07/35] ovl: copy up inode flags
Date:   Mon,  7 May 2018 10:37:39 +0200
Message-Id: <20180507083807.28792-8-mszeredi@redhat.com>
In-Reply-To: <20180507083807.28792-1-mszeredi@redhat.com>
References: <20180507083807.28792-1-mszeredi@redhat.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On inode creation copy certain inode flags from the underlying real inode
to the overlay inode.

This is in preparation for moving overlay functionality out of the VFS.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
 fs/overlayfs/overlayfs.h | 7 +++++++
 fs/overlayfs/util.c      | 1 +
 2 files changed, 8 insertions(+)

diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 271561fa7882..4e26778774c3 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -350,6 +350,13 @@ static inline void ovl_copyattr(struct inode *from, struct inode *to)
 	to->i_ctime = from->i_ctime;
 }
 
+static inline void ovl_copyflags(struct inode *from, struct inode *to)
+{
+	unsigned int mask = S_SYNC | S_IMMUTABLE | S_APPEND | S_NOATIME;
+
+	inode_set_flags(to, from->i_flags & mask, mask);
+}
+
 /* dir.c */
 extern const struct inode_operations ovl_dir_inode_operations;
 struct dentry *ovl_lookup_temp(struct dentry *workdir);
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index 30a05d1d679d..25d202b47326 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -310,6 +310,7 @@ void ovl_inode_init(struct inode *inode, struct dentry *upperdentry,
 		OVL_I(inode)->lower = igrab(d_inode(lowerdentry));
 
 	ovl_copyattr(realinode, inode);
+	ovl_copyflags(realinode, inode);
 	if (!inode->i_ino)
 		inode->i_ino = realinode->i_ino;
 }
-- 
2.14.3