[03/10] xfs: track unlinked inactive inode quota counters
diff mbox series

Message ID 157784093877.1362752.15817417024591800990.stgit@magnolia
State New
Headers show
Series
  • xfs: deferred inode inactivation
Related show

Commit Message

Darrick J. Wong Jan. 1, 2020, 1:08 a.m. UTC
From: Darrick J. Wong <darrick.wong@oracle.com>

Set up quota counters to track the number of inodes and blocks that will
be freed from inactivating unlinked inodes.  We'll use this in the
deferred inactivation patch to hide the effects of deferred processing.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/xfs/xfs_dquot.c       |   45 +++++++++++++++++++++++++++++++++++++++++++++
 fs/xfs/xfs_dquot.h       |   10 ++++++++++
 fs/xfs/xfs_inode.c       |    4 ++++
 fs/xfs/xfs_qm.c          |   13 +++++++++++++
 fs/xfs/xfs_qm_syscalls.c |    7 ++++---
 fs/xfs/xfs_quota.h       |    4 +++-
 fs/xfs/xfs_trace.h       |    1 +
 7 files changed, 80 insertions(+), 4 deletions(-)

Patch
diff mbox series

diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 6429001d1895..e50c75d9d788 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -1275,3 +1275,48 @@  xfs_qm_dqiterate(
 
 	return error;
 }
+
+/* Update dquot pending-inactivation counters. */
+STATIC void
+xfs_dquot_adjust(
+	struct xfs_dquot	*dqp,
+	int			direction,
+	int64_t			inodes,
+	int64_t			dblocks,
+	int64_t			rblocks)
+{
+	xfs_dqlock(dqp);
+	dqp->q_ina_total += direction;
+	dqp->q_ina_icount += inodes;
+	dqp->q_ina_bcount += dblocks;
+	dqp->q_ina_rtbcount += rblocks;
+	xfs_dqunlock(dqp);
+}
+
+/* Update pending-inactivation counters for all dquots attach to inode. */
+void
+xfs_qm_iadjust(
+	struct xfs_inode	*ip,
+	int			direction,
+	int64_t			inodes,
+	int64_t			dblocks,
+	int64_t			rblocks)
+{
+	struct xfs_mount	*mp = ip->i_mount;
+
+	if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp) ||
+	    xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
+		return;
+
+	if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
+		xfs_dquot_adjust(ip->i_udquot, direction, inodes, dblocks,
+				rblocks);
+
+	if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
+		xfs_dquot_adjust(ip->i_gdquot, direction, inodes, dblocks,
+				rblocks);
+
+	if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
+		xfs_dquot_adjust(ip->i_pdquot, direction, inodes, dblocks,
+				rblocks);
+}
diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index fe3e46df604b..0d58f4ae8349 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -47,6 +47,16 @@  struct xfs_dquot {
 	xfs_qcnt_t		q_res_icount;
 	/* total realtime blks used+reserved */
 	xfs_qcnt_t		q_res_rtbcount;
+
+	/* inactive inodes attached to this dquot */
+	uint64_t		q_ina_total;
+	/* inactive regular nblks used+reserved */
+	xfs_qcnt_t		q_ina_bcount;
+	/* inactive inos allocd+reserved */
+	xfs_qcnt_t		q_ina_icount;
+	/* inactive realtime blks used+reserved */
+	xfs_qcnt_t		q_ina_rtbcount;
+
 	xfs_qcnt_t		q_prealloc_lo_wmark;
 	xfs_qcnt_t		q_prealloc_hi_wmark;
 	int64_t			q_low_space[XFS_QLOWSP_MAX];
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 2fe8f030ebb8..aa019e49e512 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -36,6 +36,8 @@ 
 #include "xfs_bmap_btree.h"
 #include "xfs_reflink.h"
 #include "xfs_health.h"
+#include "xfs_dquot_item.h"
+#include "xfs_dquot.h"
 
 kmem_zone_t *xfs_inode_zone;
 
@@ -1858,6 +1860,8 @@  xfs_inode_iadjust(
 	percpu_counter_add(&mp->m_iinactive, inodes);
 	percpu_counter_add(&mp->m_dinactive, dblocks);
 	percpu_counter_add(&mp->m_rinactive, rblocks);
+
+	xfs_qm_iadjust(ip, direction, inodes, dblocks, rblocks);
 }
 
 /*
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index ed6cc943db92..fc3898f5e27d 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -424,6 +424,19 @@  xfs_qm_dquot_isolate(
 	if (!xfs_dqlock_nowait(dqp))
 		goto out_miss_busy;
 
+	/*
+	 * An inode is on the inactive list waiting to release its resources,
+	 * so remove this dquot from the freelist and try again.  We detached
+	 * the dquot from the NEEDS_INACTIVE inode so that quotaoff won't
+	 * deadlock on inactive inodes holding dquots.
+	 */
+	if (dqp->q_ina_total > 0) {
+		xfs_dqunlock(dqp);
+		trace_xfs_dqreclaim_inactive(dqp);
+		list_lru_isolate(lru, &dqp->q_lru);
+		return LRU_REMOVED;
+	}
+
 	/*
 	 * This dquot has acquired a reference in the meantime remove it from
 	 * the freelist and try again.
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index c339b7404cf3..d93bf0c39d3d 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -616,8 +616,8 @@  xfs_qm_scall_getquota_fill_qc(
 		XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_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_space = XFS_FSB_TO_B(mp, dqp->q_res_bcount);
-	dst->d_ino_count = dqp->q_res_icount;
+	dst->d_space = XFS_FSB_TO_B(mp, dqp->q_res_bcount - dqp->q_ina_bcount);
+	dst->d_ino_count = dqp->q_res_icount - dqp->q_ina_icount;
 	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);
@@ -626,7 +626,8 @@  xfs_qm_scall_getquota_fill_qc(
 		XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_rtb_hardlimit));
 	dst->d_rt_spc_softlimit =
 		XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_rtb_softlimit));
-	dst->d_rt_space = XFS_FSB_TO_B(mp, dqp->q_res_rtbcount);
+	dst->d_rt_space =
+		XFS_FSB_TO_B(mp, dqp->q_res_rtbcount - dqp->q_ina_rtbcount);
 	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);
 
diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h
index efe42ae7a2f3..c354f01dae7b 100644
--- a/fs/xfs/xfs_quota.h
+++ b/fs/xfs/xfs_quota.h
@@ -106,7 +106,8 @@  extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
 extern void xfs_qm_mount_quotas(struct xfs_mount *);
 extern void xfs_qm_unmount(struct xfs_mount *);
 extern void xfs_qm_unmount_quotas(struct xfs_mount *);
-
+extern void xfs_qm_iadjust(struct xfs_inode *ip, int direction, int64_t inodes,
+			   int64_t dblocks, int64_t rblocks);
 #else
 static inline int
 xfs_qm_vop_dqalloc(struct xfs_inode *ip, xfs_dqid_t uid, xfs_dqid_t gid,
@@ -148,6 +149,7 @@  static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
 #define xfs_qm_mount_quotas(mp)
 #define xfs_qm_unmount(mp)
 #define xfs_qm_unmount_quotas(mp)
+#define xfs_qm_iadjust(ip, dir, inodes, dblocks, rblocks)
 #endif /* CONFIG_XFS_QUOTA */
 
 #define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index cee45e6cdb39..0064f4491d66 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -906,6 +906,7 @@  DEFINE_EVENT(xfs_dquot_class, name, \
 	TP_PROTO(struct xfs_dquot *dqp), \
 	TP_ARGS(dqp))
 DEFINE_DQUOT_EVENT(xfs_dqadjust);
+DEFINE_DQUOT_EVENT(xfs_dqreclaim_inactive);
 DEFINE_DQUOT_EVENT(xfs_dqreclaim_want);
 DEFINE_DQUOT_EVENT(xfs_dqreclaim_dirty);
 DEFINE_DQUOT_EVENT(xfs_dqreclaim_busy);