linux-kernel - [RFC v2a 06/12] fs: btrfs: Change btrfs_inode.i_otime to use vfs

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Date:	Fri, 12 Feb 2016 01:36:00 -0800
From:	Deepa Dinamani <deepa.kernel@...il.com>
To:	linux-fsdevel@...r.kernel.org, y2038@...ts.linaro.org
Cc:	Arnd Bergmann <arnd@...db.de>, Dave Chinner <david@...morbit.com>,
	"Theodore Ts'o" <tytso@....edu>, linux-kernel@...r.kernel.org
Subject: [RFC v2a 06/12] fs: btrfs: Change btrfs_inode.i_otime to use vfs_time data type

The VFS inode timestamps are not y2038 safe as they use
struct timespec. These will be changed to use struct timespec64
instead and that is y2038 safe.
But, since the above data type conversion will break the end
file systems, use vfs_time aliases here to access inode times.
struct btrfs_inode is the in memory inode structure for btrfs.
i_otime is a member of the btrfs_inode that represents file
creation times.

Like all the other inode timestamps in struct inode, i_otime is
assigned to/ from disk or struct inode times or 0.

Hence, i_otime needs to change along with other inode
timestamps. Use vfs_time data type to make the transition to
64 bit time along with the other inode timestamps.

Signed-off-by: Deepa Dinamani <deepa.kernel@...il.com>
---
 fs/btrfs/btrfs_inode.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 61205e3..e45b7af 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -190,7 +190,7 @@ struct btrfs_inode {
 	struct btrfs_delayed_node *delayed_node;

 	/* File creation time. */
-	struct timespec i_otime;
+	struct vfs_time i_otime;

 	/* Hook into fs_info->delayed_iputs */
 	struct list_head delayed_iput;
-- 
1.9.1