ocfs2: replace CURRENT_TIME macro

CURRENT_TIME is not y2038 safe.

Use y2038 safe ktime_get_real_seconds() here for timestamps.  struct
heartbeat_block's hb_seq and deletetion time are already 64 bits wide
and accommodate times beyond y2038.

Also use y2038 safe ktime_get_real_ts64() for on disk inode timestamps.
These are also wide enough to accommodate time64_t.

Link: http://lkml.kernel.org/r/1475365298-29236-1-git-send-email-deepa.kernel@gmail.com
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Cc: Mark Fasheh <mfasheh@versity.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ocfs2/cluster/heartbeat.c

@@ -741,7 +741,7 @@ static inline void o2hb_prepare_block(struct o2hb_region *reg,
 	hb_block = (struct o2hb_disk_heartbeat_block *)slot->ds_raw_block;
 	memset(hb_block, 0, reg->hr_block_bytes);
 	/* TODO: time stuff */
-	cputime = CURRENT_TIME.tv_sec;
+	cputime = ktime_get_real_seconds();
 	if (!cputime)
 		cputime = 1;
 

fs/ocfs2/inode.c

@@ -703,7 +703,7 @@ static int ocfs2_remove_inode(struct inode *inode,
 		goto bail_commit;
 	}
 
-	di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
+	di->i_dtime = cpu_to_le64(ktime_get_real_seconds());
 	di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
 	ocfs2_journal_dirty(handle, di_bh);
 

fs/ocfs2/namei.c

@@ -516,6 +516,7 @@ static int __ocfs2_mknod_locked(struct inode *dir,
 	struct ocfs2_extent_list *fel;
 	u16 feat;
 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
+	struct timespec64 ts;
 
 	*new_fe_bh = NULL;
 
@@ -564,10 +565,11 @@ static int __ocfs2_mknod_locked(struct inode *dir,
 	fe->i_last_eb_blk = 0;
 	strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 	fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
+	ktime_get_real_ts64(&ts);
 	fe->i_atime = fe->i_ctime = fe->i_mtime =
-		cpu_to_le64(CURRENT_TIME.tv_sec);
+		cpu_to_le64(ts.tv_sec);
 	fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
-		cpu_to_le32(CURRENT_TIME.tv_nsec);
+		cpu_to_le32(ts.tv_nsec);
 	fe->i_dtime = 0;
 
 	/*