xfs: refactor quota timestamp coding

Refactor quota timestamp encoding and decoding into helper functions so
that we can add extra behavior in the next patch.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

fs/xfs/libxfs/xfs_dquot_buf.c

@@ -288,3 +288,21 @@ const struct xfs_buf_ops xfs_dquot_buf_ra_ops = {
 	.verify_read = xfs_dquot_buf_readahead_verify,
 	.verify_write = xfs_dquot_buf_write_verify,
 };
+
+/* Convert an on-disk timer value into an incore timer value. */
+time64_t
+xfs_dquot_from_disk_ts(
+	struct xfs_disk_dquot	*ddq,
+	__be32			dtimer)
+{
+	return be32_to_cpu(dtimer);
+}
+
+/* Convert an incore timer value into an on-disk timer value. */
+__be32
+xfs_dquot_to_disk_ts(
+	struct xfs_dquot	*dqp,
+	time64_t		timer)
+{
+	return cpu_to_be32(timer);
+}

fs/xfs/libxfs/xfs_quota_defs.h

@@ -143,4 +143,9 @@ extern int xfs_calc_dquots_per_chunk(unsigned int nbblks);
 extern void xfs_dqblk_repair(struct xfs_mount *mp, struct xfs_dqblk *dqb,
 		xfs_dqid_t id, xfs_dqtype_t type);
 
+struct xfs_dquot;
+time64_t xfs_dquot_from_disk_ts(struct xfs_disk_dquot *ddq,
+		__be32 dtimer);
+__be32 xfs_dquot_to_disk_ts(struct xfs_dquot *ddq, time64_t timer);
+
 #endif	/* __XFS_QUOTA_H__ */

fs/xfs/xfs_dquot.c

@@ -536,9 +536,9 @@ xfs_dquot_from_disk(
 	dqp->q_ino.warnings = be16_to_cpu(ddqp->d_iwarns);
 	dqp->q_rtb.warnings = be16_to_cpu(ddqp->d_rtbwarns);
 
-	dqp->q_blk.timer = be32_to_cpu(ddqp->d_btimer);
-	dqp->q_ino.timer = be32_to_cpu(ddqp->d_itimer);
-	dqp->q_rtb.timer = be32_to_cpu(ddqp->d_rtbtimer);
+	dqp->q_blk.timer = xfs_dquot_from_disk_ts(ddqp, ddqp->d_btimer);
+	dqp->q_ino.timer = xfs_dquot_from_disk_ts(ddqp, ddqp->d_itimer);
+	dqp->q_rtb.timer = xfs_dquot_from_disk_ts(ddqp, ddqp->d_rtbtimer);
 
 	/*
 	 * Reservation counters are defined as reservation plus current usage
@@ -581,9 +581,9 @@ xfs_dquot_to_disk(
 	ddqp->d_iwarns = cpu_to_be16(dqp->q_ino.warnings);
 	ddqp->d_rtbwarns = cpu_to_be16(dqp->q_rtb.warnings);
 
-	ddqp->d_btimer = cpu_to_be32(dqp->q_blk.timer);
-	ddqp->d_itimer = cpu_to_be32(dqp->q_ino.timer);
-	ddqp->d_rtbtimer = cpu_to_be32(dqp->q_rtb.timer);
+	ddqp->d_btimer = xfs_dquot_to_disk_ts(dqp, dqp->q_blk.timer);
+	ddqp->d_itimer = xfs_dquot_to_disk_ts(dqp, dqp->q_ino.timer);
+	ddqp->d_rtbtimer = xfs_dquot_to_disk_ts(dqp, dqp->q_rtb.timer);
 }
 
 /* Allocate and initialize the dquot buffer for this in-core dquot. */