xfs: stop using q_core warning counters in the quota code

Add warning counter fields to the incore dquot, and use that instead of
the ones in qcore.  This eliminates a bunch of endian conversions and
will eventually allow us to remove qcore entirely.
Signed-off-by: NDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: NChandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NAllison Collins <allison.henderson@oracle.com>

fs/xfs/xfs_dquot.c

@@ -140,7 +140,7 @@ xfs_qm_adjust_dqtimers(
 			d->d_btimer = cpu_to_be32(ktime_get_real_seconds() +
 					defq->btimelimit);
 		} else {
-			d->d_bwarns = 0;
+			dq->q_blk.warnings = 0;
 		}
 	} else {
 		if ((!dq->q_blk.softlimit ||
@@ -159,7 +159,7 @@ xfs_qm_adjust_dqtimers(
 			d->d_itimer = cpu_to_be32(ktime_get_real_seconds() +
 					defq->itimelimit);
 		} else {
-			d->d_iwarns = 0;
+			dq->q_ino.warnings = 0;
 		}
 	} else {
 		if ((!dq->q_ino.softlimit ||
@@ -178,7 +178,7 @@ xfs_qm_adjust_dqtimers(
 			d->d_rtbtimer = cpu_to_be32(ktime_get_real_seconds() +
 					defq->rtbtimelimit);
 		} else {
-			d->d_rtbwarns = 0;
+			dq->q_rtb.warnings = 0;
 		}
 	} else {
 		if ((!dq->q_rtb.softlimit ||
@@ -542,6 +542,10 @@ xfs_dquot_from_disk(
 	dqp->q_ino.count = be64_to_cpu(ddqp->d_icount);
 	dqp->q_rtb.count = be64_to_cpu(ddqp->d_rtbcount);
 
+	dqp->q_blk.warnings = be16_to_cpu(ddqp->d_bwarns);
+	dqp->q_ino.warnings = be16_to_cpu(ddqp->d_iwarns);
+	dqp->q_rtb.warnings = be16_to_cpu(ddqp->d_rtbwarns);
+
 	/*
 	 * Reservation counters are defined as reservation plus current usage
 	 * to avoid having to add every time.
@@ -572,6 +576,10 @@ xfs_dquot_to_disk(
 	ddqp->d_bcount = cpu_to_be64(dqp->q_blk.count);
 	ddqp->d_icount = cpu_to_be64(dqp->q_ino.count);
 	ddqp->d_rtbcount = cpu_to_be64(dqp->q_rtb.count);
+
+	ddqp->d_bwarns = cpu_to_be16(dqp->q_blk.warnings);
+	ddqp->d_iwarns = cpu_to_be16(dqp->q_ino.warnings);
+	ddqp->d_rtbwarns = cpu_to_be16(dqp->q_rtb.warnings);
 }
 
 /* Allocate and initialize the dquot buffer for this in-core dquot. */

fs/xfs/xfs_dquot.h

@@ -37,6 +37,14 @@ struct xfs_dquot_res {
 	/* Absolute and preferred limits. */
 	xfs_qcnt_t		hardlimit;
 	xfs_qcnt_t		softlimit;
+
+	/*
+	 * For root dquots, this is the maximum number of warnings that will
+	 * be issued for this quota type.  Otherwise, this is the number of
+	 * warnings issued against this quota.  Note that none of this is
+	 * implemented.
+	 */
+	xfs_qwarncnt_t		warnings;
 };
 
 /*

fs/xfs/xfs_qm.c

@@ -616,12 +616,12 @@ xfs_qm_init_timelimits(
 		defq->itimelimit = be32_to_cpu(ddqp->d_itimer);
 	if (ddqp->d_rtbtimer)
 		defq->rtbtimelimit = be32_to_cpu(ddqp->d_rtbtimer);
-	if (ddqp->d_bwarns)
-		defq->bwarnlimit = be16_to_cpu(ddqp->d_bwarns);
-	if (ddqp->d_iwarns)
-		defq->iwarnlimit = be16_to_cpu(ddqp->d_iwarns);
-	if (ddqp->d_rtbwarns)
-		defq->rtbwarnlimit = be16_to_cpu(ddqp->d_rtbwarns);
+	if (dqp->q_blk.warnings)
+		defq->bwarnlimit = dqp->q_blk.warnings;
+	if (dqp->q_ino.warnings)
+		defq->iwarnlimit = dqp->q_ino.warnings;
+	if (dqp->q_rtb.warnings)
+		defq->rtbwarnlimit = dqp->q_rtb.warnings;
 
 	xfs_qm_dqdestroy(dqp);
 }

fs/xfs/xfs_qm_syscalls.c

@@ -548,11 +548,11 @@ xfs_qm_scall_setqlim(
 	 * Update warnings counter(s) if requested
 	 */
 	if (newlim->d_fieldmask & QC_SPC_WARNS)
-		ddq->d_bwarns = cpu_to_be16(newlim->d_spc_warns);
+		dqp->q_blk.warnings = newlim->d_spc_warns;
 	if (newlim->d_fieldmask & QC_INO_WARNS)
-		ddq->d_iwarns = cpu_to_be16(newlim->d_ino_warns);
+		dqp->q_ino.warnings = newlim->d_ino_warns;
 	if (newlim->d_fieldmask & QC_RT_SPC_WARNS)
-		ddq->d_rtbwarns = cpu_to_be16(newlim->d_rt_spc_warns);
+		dqp->q_rtb.warnings = newlim->d_rt_spc_warns;
 
 	if (id == 0) {
 		if (newlim->d_fieldmask & QC_SPC_WARNS)
@@ -627,13 +627,13 @@ xfs_qm_scall_getquota_fill_qc(
 	dst->d_ino_count = dqp->q_ino.reserved;
 	dst->d_spc_timer = be32_to_cpu(dqp->q_core.d_btimer);
 	dst->d_ino_timer = be32_to_cpu(dqp->q_core.d_itimer);
-	dst->d_ino_warns = be16_to_cpu(dqp->q_core.d_iwarns);
-	dst->d_spc_warns = be16_to_cpu(dqp->q_core.d_bwarns);
+	dst->d_ino_warns = dqp->q_ino.warnings;
+	dst->d_spc_warns = dqp->q_blk.warnings;
 	dst->d_rt_spc_hardlimit = XFS_FSB_TO_B(mp, dqp->q_rtb.hardlimit);
 	dst->d_rt_spc_softlimit = XFS_FSB_TO_B(mp, dqp->q_rtb.softlimit);
 	dst->d_rt_space = XFS_FSB_TO_B(mp, dqp->q_rtb.reserved);
 	dst->d_rt_spc_timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
-	dst->d_rt_spc_warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
+	dst->d_rt_spc_warns = dqp->q_rtb.warnings;
 
 	/*
 	 * Internally, we don't reset all the timers when quota enforcement

fs/xfs/xfs_trans_dquot.c

@@ -592,7 +592,7 @@ xfs_trans_dqresv(
 		if (!softlimit)
 			softlimit = defq->bsoftlimit;
 		timer = be32_to_cpu(dqp->q_core.d_btimer);
-		warns = be16_to_cpu(dqp->q_core.d_bwarns);
+		warns = dqp->q_blk.warnings;
 		warnlimit = defq->bwarnlimit;
 		resbcountp = &dqp->q_blk.reserved;
 	} else {
@@ -604,7 +604,7 @@ xfs_trans_dqresv(
 		if (!softlimit)
 			softlimit = defq->rtbsoftlimit;
 		timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
-		warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
+		warns = dqp->q_rtb.warnings;
 		warnlimit = defq->rtbwarnlimit;
 		resbcountp = &dqp->q_rtb.reserved;
 	}
@@ -639,7 +639,7 @@ xfs_trans_dqresv(
 		if (ninos > 0) {
 			total_count = dqp->q_ino.reserved + ninos;
 			timer = be32_to_cpu(dqp->q_core.d_itimer);
-			warns = be16_to_cpu(dqp->q_core.d_iwarns);
+			warns = dqp->q_ino.warnings;
 			warnlimit = defq->iwarnlimit;
 			hardlimit = dqp->q_ino.hardlimit;
 			if (!hardlimit)