Re: [PATCH 10/18] xfs: stop using q_core timers in the quota code

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On 6/30/20 8:42 AM, Darrick J. Wong wrote:
From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

Add timers 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: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

Looks good
Reviewed-by: Allison Collins <allison.henderson@xxxxxxxxxx>

---
  fs/xfs/xfs_dquot.c       |   41 +++++++++++++++++++++++------------------
  fs/xfs/xfs_dquot.h       |    7 +++++++
  fs/xfs/xfs_qm.c          |   15 ++++++---------
  fs/xfs/xfs_qm_syscalls.c |   18 ++++++++----------
  fs/xfs/xfs_trans_dquot.c |    6 +++---
  5 files changed, 47 insertions(+), 40 deletions(-)


diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index a1edb49ceda5..7434ee57ec43 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -116,7 +116,6 @@ xfs_qm_adjust_dqtimers(
  	struct xfs_dquot	*dq)
  {
  	struct xfs_quotainfo	*qi = mp->m_quotainfo;
-	struct xfs_disk_dquot	*d = &dq->q_core;
  	struct xfs_def_quota	*defq;
ASSERT(dq->q_id);
@@ -131,13 +130,13 @@ xfs_qm_adjust_dqtimers(
  		ASSERT(dq->q_rtb.softlimit <= dq->q_rtb.hardlimit);
  #endif
- if (!d->d_btimer) {
+	if (!dq->q_blk.timer) {
  		if ((dq->q_blk.softlimit &&
  		     (dq->q_blk.count > dq->q_blk.softlimit)) ||
  		    (dq->q_blk.hardlimit &&
  		     (dq->q_blk.count > dq->q_blk.hardlimit))) {
-			d->d_btimer = cpu_to_be32(ktime_get_real_seconds() +
-					defq->btimelimit);
+			dq->q_blk.timer = ktime_get_real_seconds() +
+					defq->btimelimit;
  		} else {
  			dq->q_blk.warnings = 0;
  		}
@@ -146,17 +145,17 @@ xfs_qm_adjust_dqtimers(
  		     (dq->q_blk.count <= dq->q_blk.softlimit)) &&
  		    (!dq->q_blk.hardlimit ||
  		    (dq->q_blk.count <= dq->q_blk.hardlimit))) {
-			d->d_btimer = 0;
+			dq->q_blk.timer = 0;
  		}
  	}
- if (!d->d_itimer) {
+	if (!dq->q_ino.timer) {
  		if ((dq->q_ino.softlimit &&
  		     (dq->q_ino.count > dq->q_ino.softlimit)) ||
  		    (dq->q_ino.hardlimit &&
  		     (dq->q_ino.count > dq->q_ino.hardlimit))) {
-			d->d_itimer = cpu_to_be32(ktime_get_real_seconds() +
-					defq->itimelimit);
+			dq->q_ino.timer = ktime_get_real_seconds() +
+					defq->itimelimit;
  		} else {
  			dq->q_ino.warnings = 0;
  		}
@@ -165,17 +164,17 @@ xfs_qm_adjust_dqtimers(
  		     (dq->q_ino.count <= dq->q_ino.softlimit))  &&
  		    (!dq->q_ino.hardlimit ||
  		     (dq->q_ino.count <= dq->q_ino.hardlimit))) {
-			d->d_itimer = 0;
+			dq->q_ino.timer = 0;
  		}
  	}
- if (!d->d_rtbtimer) {
+	if (!dq->q_rtb.timer) {
  		if ((dq->q_rtb.softlimit &&
  		     (dq->q_rtb.count > dq->q_rtb.softlimit)) ||
  		    (dq->q_rtb.hardlimit &&
  		     (dq->q_rtb.count > dq->q_rtb.hardlimit))) {
-			d->d_rtbtimer = cpu_to_be32(ktime_get_real_seconds() +
-					defq->rtbtimelimit);
+			dq->q_rtb.timer = ktime_get_real_seconds() +
+					defq->rtbtimelimit;
  		} else {
  			dq->q_rtb.warnings = 0;
  		}
@@ -184,7 +183,7 @@ xfs_qm_adjust_dqtimers(
  		     (dq->q_rtb.count <= dq->q_rtb.softlimit)) &&
  		    (!dq->q_rtb.hardlimit ||
  		     (dq->q_rtb.count <= dq->q_rtb.hardlimit))) {
-			d->d_rtbtimer = 0;
+			dq->q_rtb.timer = 0;
  		}
  	}
  }
@@ -546,6 +545,10 @@ 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);
+
  	/*
  	 * Reservation counters are defined as reservation plus current usage
  	 * to avoid having to add every time.
@@ -581,6 +584,10 @@ xfs_dquot_to_disk(
  	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);
+
+	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);
  }
/* Allocate and initialize the dquot buffer for this in-core dquot. */
@@ -1135,8 +1142,6 @@ static xfs_failaddr_t
  xfs_qm_dqflush_check(
  	struct xfs_dquot	*dqp)
  {
-	struct xfs_disk_dquot	*ddq = &dqp->q_core;
-
  	if (hweight8(dqp->dq_flags & XFS_DQ_ALLTYPES) != 1)
  		return __this_address;
@@ -1144,15 +1149,15 @@ xfs_qm_dqflush_check(
  		return NULL;
if (dqp->q_blk.softlimit && dqp->q_blk.count > dqp->q_blk.softlimit &&
-	    !ddq->d_btimer)
+	    !dqp->q_blk.timer)
  		return __this_address;
if (dqp->q_ino.softlimit && dqp->q_ino.count > dqp->q_ino.softlimit &&
-	    !ddq->d_itimer)
+	    !dqp->q_ino.timer)
  		return __this_address;
if (dqp->q_rtb.softlimit && dqp->q_rtb.count > dqp->q_rtb.softlimit &&
-	    !ddq->d_rtbtimer)
+	    !dqp->q_rtb.timer)
  		return __this_address;
return NULL;
diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index 5840bc54b772..414bae537b1d 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -38,6 +38,13 @@ struct xfs_dquot_res {
  	xfs_qcnt_t		hardlimit;
  	xfs_qcnt_t		softlimit;
+ /*
+	 * For root dquots, this is the default grace period, in seconds.
+	 * Otherwise, this is when the quota grace period expires,
+	 * in seconds since the Unix epoch.
+	 */
+	time64_t		timer;
+
  	/*
  	 * For root dquots, this is the maximum number of warnings that will
  	 * be issued for this quota type.  Otherwise, this is the number of
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 4e233cfef46d..a56c6e4a5d99 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -579,7 +579,6 @@ xfs_qm_init_timelimits(
  {
  	struct xfs_quotainfo	*qinf = mp->m_quotainfo;
  	struct xfs_def_quota	*defq;
-	struct xfs_disk_dquot	*ddqp;
  	struct xfs_dquot	*dqp;
  	int			error;
@@ -603,19 +602,17 @@ xfs_qm_init_timelimits(
  	if (error)
  		return;
- ddqp = &dqp->q_core;
-
  	/*
  	 * The warnings and timers set the grace period given to
  	 * a user or group before he or she can not perform any
  	 * more writing. If it is zero, a default is used.
  	 */
-	if (ddqp->d_btimer)
-		defq->btimelimit = be32_to_cpu(ddqp->d_btimer);
-	if (ddqp->d_itimer)
-		defq->itimelimit = be32_to_cpu(ddqp->d_itimer);
-	if (ddqp->d_rtbtimer)
-		defq->rtbtimelimit = be32_to_cpu(ddqp->d_rtbtimer);
+	if (dqp->q_blk.timer)
+		defq->btimelimit = dqp->q_blk.timer;
+	if (dqp->q_ino.timer)
+		defq->itimelimit = dqp->q_ino.timer;
+	if (dqp->q_rtb.timer)
+		defq->rtbtimelimit = dqp->q_rtb.timer;
  	if (dqp->q_blk.warnings)
  		defq->bwarnlimit = dqp->q_blk.warnings;
  	if (dqp->q_ino.warnings)
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index 5d3bccdbd3bf..1b2b70b1660f 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -447,7 +447,6 @@ xfs_qm_scall_setqlim(
  	struct qc_dqblk		*newlim)
  {
  	struct xfs_quotainfo	*q = mp->m_quotainfo;
-	struct xfs_disk_dquot	*ddq;
  	struct xfs_dquot	*dqp;
  	struct xfs_trans	*tp;
  	struct xfs_def_quota	*defq;
@@ -488,7 +487,6 @@ xfs_qm_scall_setqlim(
xfs_dqlock(dqp);
  	xfs_trans_dqjoin(tp, dqp);
-	ddq = &dqp->q_core;
/*
  	 * Make sure that hardlimits are >= soft limits before changing.
@@ -573,11 +571,11 @@ xfs_qm_scall_setqlim(
  	 * the soft limit.
  	 */
  	if (newlim->d_fieldmask & QC_SPC_TIMER)
-		ddq->d_btimer = cpu_to_be32(newlim->d_spc_timer);
+		dqp->q_blk.timer = newlim->d_spc_timer;
  	if (newlim->d_fieldmask & QC_INO_TIMER)
-		ddq->d_itimer = cpu_to_be32(newlim->d_ino_timer);
+		dqp->q_ino.timer = newlim->d_ino_timer;
  	if (newlim->d_fieldmask & QC_RT_SPC_TIMER)
-		ddq->d_rtbtimer = cpu_to_be32(newlim->d_rt_spc_timer);
+		dqp->q_rtb.timer = newlim->d_rt_spc_timer;
if (id == 0) {
  		if (newlim->d_fieldmask & QC_SPC_TIMER)
@@ -621,18 +619,18 @@ xfs_qm_scall_getquota_fill_qc(
  	memset(dst, 0, sizeof(*dst));
  	dst->d_spc_hardlimit = XFS_FSB_TO_B(mp, dqp->q_blk.hardlimit);
  	dst->d_spc_softlimit = XFS_FSB_TO_B(mp, dqp->q_blk.softlimit);
-	dst->d_ino_hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
-	dst->d_ino_softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
+	dst->d_ino_hardlimit = dqp->q_ino.hardlimit;
+	dst->d_ino_softlimit = dqp->q_ino.softlimit;
  	dst->d_space = XFS_FSB_TO_B(mp, dqp->q_blk.reserved);
  	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_spc_timer = dqp->q_blk.timer;
+	dst->d_ino_timer = dqp->q_ino.timer;
  	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_timer = dqp->q_rtb.timer;
  	dst->d_rt_spc_warns = dqp->q_rtb.warnings;
/*
diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index 21ed8eda3c80..28b59a4069a3 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -591,7 +591,7 @@ xfs_trans_dqresv(
  		softlimit = dqp->q_blk.softlimit;
  		if (!softlimit)
  			softlimit = defq->bsoftlimit;
-		timer = be32_to_cpu(dqp->q_core.d_btimer);
+		timer = dqp->q_blk.timer;
  		warns = dqp->q_blk.warnings;
  		warnlimit = defq->bwarnlimit;
  		resbcountp = &dqp->q_blk.reserved;
@@ -603,7 +603,7 @@ xfs_trans_dqresv(
  		softlimit = dqp->q_rtb.softlimit;
  		if (!softlimit)
  			softlimit = defq->rtbsoftlimit;
-		timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
+		timer = dqp->q_rtb.timer;
  		warns = dqp->q_rtb.warnings;
  		warnlimit = defq->rtbwarnlimit;
  		resbcountp = &dqp->q_rtb.reserved;
@@ -638,7 +638,7 @@ xfs_trans_dqresv(
  		}
  		if (ninos > 0) {
  			total_count = dqp->q_ino.reserved + ninos;
-			timer = be32_to_cpu(dqp->q_core.d_itimer);
+			timer = dqp->q_ino.timer;
  			warns = dqp->q_ino.warnings;
  			warnlimit = defq->iwarnlimit;
  			hardlimit = dqp->q_ino.hardlimit;




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