linux-kernel - [RFC v2c 8/8] fs: xfs: change inode times to use vfs

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Date:	Fri, 12 Feb 2016 01:52:53 -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 v2c 8/8] fs: xfs: change inode times 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 timespec64 and conversion functions here to
access inode times.

All the timestamps are converted to use struct timespec64 data
type. And, all the vfs timestamps are converted to timespec64
at the boundary of vfs.

Signed-off-by: Deepa Dinamani <deepa.kernel@...il.com>
---
 fs/xfs/xfs_inode.c       | 2 +-
 fs/xfs/xfs_iops.c        | 2 +-
 fs/xfs/xfs_trans_inode.c | 7 ++++---
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index ceba1a8..ebf76a3 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -765,7 +765,7 @@ xfs_ialloc(
 	xfs_inode_t	*ip;
 	uint		flags;
 	int		error;
-	struct timespec	tv;
+	struct vfs_time	tv;
 
 	/*
 	 * Call the space management code to pick
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 76b71a1..7f8a897 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -973,7 +973,7 @@ xfs_vn_setattr(
 STATIC int
 xfs_vn_update_time(
 	struct inode		*inode,
-	struct timespec		*now,
+	struct vfs_time		*now,
 	int			flags)
 {
 	struct xfs_inode	*ip = XFS_I(inode);
diff --git a/fs/xfs/xfs_trans_inode.c b/fs/xfs/xfs_trans_inode.c
index b97f1df..1242502 100644
--- a/fs/xfs/xfs_trans_inode.c
+++ b/fs/xfs/xfs_trans_inode.c
@@ -68,7 +68,7 @@ xfs_trans_ichgtime(
 	int			flags)
 {
 	struct inode		*inode = VFS_I(ip);
-	struct timespec		tv;
+	struct vfs_time		tv;
 
 	ASSERT(tp);
 	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
@@ -76,13 +76,14 @@ xfs_trans_ichgtime(
 	tv = current_fs_time(inode->i_sb);
 
 	if ((flags & XFS_ICHGTIME_MOD) &&
-	    !timespec_equal(&inode->i_mtime, &tv)) {
+	    !vfs_time_equal(&inode->i_mtime, &tv)) {
 		inode->i_mtime = tv;
 		ip->i_d.di_mtime.t_sec = tv.tv_sec;
 		ip->i_d.di_mtime.t_nsec = tv.tv_nsec;
 	}
+
 	if ((flags & XFS_ICHGTIME_CHG) &&
-	    !timespec_equal(&inode->i_ctime, &tv)) {
+	    !vfs_time_equal(&inode->i_ctime, &tv)) {
 		inode->i_ctime = tv;
 		ip->i_d.di_ctime.t_sec = tv.tv_sec;
 		ip->i_d.di_ctime.t_nsec = tv.tv_nsec;
-- 
1.9.1