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From: Chengguang Xu <cgxu519@mykernel.net>
To: miklos@szeredi.hu, jack@suse.cz, amir73il@gmail.com
Cc: linux-fsdevel@vger.kernel.org, linux-unionfs@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Chengguang Xu <cgxu519@mykernel.net>
Subject: [RFC PATCH v5 02/10] ovl: implement ->writepages operation
Date: Thu, 23 Sep 2021 21:08:06 +0800	[thread overview]
Message-ID: <20210923130814.140814-3-cgxu519@mykernel.net> (raw)
In-Reply-To: <20210923130814.140814-1-cgxu519@mykernel.net>

Implement overlayfs' ->writepages operation so that
we can sync dirty data/metadata to upper filesystem.

Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
---
 fs/overlayfs/inode.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 832b17589733..d854e59a3710 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -659,9 +659,22 @@ static const struct inode_operations ovl_special_inode_operations = {
 	.update_time	= ovl_update_time,
 };
 
+static int ovl_writepages(struct address_space *mapping,
+			  struct writeback_control *wbc)
+{
+	struct inode *inode = mapping->host;
+	struct ovl_fs *ofs = inode->i_sb->s_fs_info;
+	struct inode *upper = ovl_inode_upper(inode);
+
+	if (!ovl_should_sync(ofs))
+		return 0;
+	return filemap_fdatawrite_wbc(upper->i_mapping, wbc);
+}
+
 static const struct address_space_operations ovl_aops = {
 	/* For O_DIRECT dentry_open() checks f_mapping->a_ops->direct_IO */
 	.direct_IO		= noop_direct_IO,
+	.writepages		= ovl_writepages,
 };
 
 /*
-- 
2.27.0



  parent reply	other threads:[~2021-09-23 13:24 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-23 13:08 [RFC PATCH v5 00/10] implement containerized syncfs for overlayfs Chengguang Xu
2021-09-23 13:08 ` [RFC PATCH v5 01/10] ovl: setup overlayfs' private bdi Chengguang Xu
2021-09-23 13:08 ` Chengguang Xu [this message]
2021-09-23 13:08 ` [RFC PATCH v5 03/10] ovl: implement overlayfs' ->evict_inode operation Chengguang Xu
2021-10-06 15:33   ` Miklos Szeredi
2021-10-07  6:08     ` Chengguang Xu
2021-10-07  7:43       ` Miklos Szeredi
2021-09-23 13:08 ` [RFC PATCH v5 04/10] ovl: mark overlayfs' inode dirty on modification Chengguang Xu
2021-10-07 18:43   ` Miklos Szeredi
2021-09-23 13:08 ` [RFC PATCH v5 05/10] ovl: mark overlayfs' inode dirty on shared mmap Chengguang Xu
2021-09-23 13:08 ` [RFC PATCH v5 06/10] ovl: implement overlayfs' ->write_inode operation Chengguang Xu
2021-10-07  9:01   ` Jan Kara
2021-10-07 12:26     ` Chengguang Xu
2021-10-07 14:41       ` Jan Kara
2021-10-07 14:54         ` Chengguang Xu
2021-10-07  9:23   ` Miklos Szeredi
2021-10-07 12:28     ` Chengguang Xu
2021-10-07 12:45       ` Miklos Szeredi
2021-10-07 13:09         ` Chengguang Xu
2021-10-07 13:34           ` Miklos Szeredi
2021-10-07 14:46             ` Jan Kara
2021-10-07 14:53               ` Chengguang Xu
2021-10-07 18:51                 ` Miklos Szeredi
2021-10-08 13:13                   ` Jan Kara
2021-11-16  2:20             ` Chengguang Xu
2021-11-16 12:35               ` Miklos Szeredi
2021-11-17  6:11                 ` Chengguang Xu
2021-11-18  6:32                   ` Chengguang Xu
2021-11-18 11:23                     ` Jan Kara
2021-11-18 12:02                       ` Chengguang Xu
2021-11-18 16:43                         ` Jan Kara
2021-11-19  6:12                           ` Chengguang Xu
2021-11-30 11:22                             ` Jan Kara
2021-11-30 16:09                               ` Chengguang Xu
2021-11-30 19:04                                 ` Amir Goldstein
2021-12-01  2:37                                   ` Chengguang Xu
2021-12-01  6:31                                     ` Chengguang Xu
2021-12-01  7:19                                       ` Amir Goldstein
2021-12-01 13:46                                         ` Jan Kara
2021-12-01 14:59                                           ` Chengguang Xu
2021-12-01 16:24                                           ` Chengguang Xu
2021-12-01 22:47                                             ` Amir Goldstein
2021-12-01 23:23                                               ` ovl_flush() behavior Amir Goldstein
2021-12-02  2:11                                                 ` Chengguang Xu
2021-12-02 15:20                                                   ` Vivek Goyal
2021-12-02 15:59                                                     ` Amir Goldstein
2021-12-02 22:00                                                       ` Vivek Goyal
2021-12-02 15:14                                                 ` Vivek Goyal
2021-12-05 14:06                                               ` [RFC PATCH v5 06/10] ovl: implement overlayfs' ->write_inode operation Chengguang Xu
2021-12-07  5:33                                                 ` Amir Goldstein
2022-02-05 16:09                                                   ` Chengguang Xu
2022-02-05 16:23                                                     ` Amir Goldstein
2021-09-23 13:08 ` [RFC PATCH v5 07/10] ovl: cache dirty overlayfs' inode Chengguang Xu
2021-10-07 11:09   ` Miklos Szeredi
2021-10-07 12:04     ` Chengguang Xu
2021-10-07 12:27       ` Miklos Szeredi
2021-09-23 13:08 ` [RFC PATCH v5 08/10] fs: export wait_sb_inodes() Chengguang Xu
2021-09-23 13:08 ` [RFC PATCH v5 09/10] fs: introduce new helper sync_fs_and_blockdev() Chengguang Xu
2021-10-19  7:15   ` Amir Goldstein
2021-11-15 11:39     ` Chengguang Xu
2021-09-23 13:08 ` [RFC PATCH v5 10/10] ovl: implement containerized syncfs for overlayfs Chengguang Xu

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