[05/12] xfs: track unlinked inactive inode quota counters
diff mbox series

Message ID 154630904149.16693.3792457499320708413.stgit@magnolia
State New
Headers show
Series
  • xfs: deferred inode inactivation
Related show

Commit Message

Darrick J. Wong Jan. 1, 2019, 2:17 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       |    4 ++++
 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, 74 insertions(+), 4 deletions(-)

Patch
diff mbox series

diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 87e6dd5326d5..14e2b732213e 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -1270,3 +1270,48 @@  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 64bd8640f6e8..4be05d44fa4a 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -45,6 +45,10 @@  typedef struct xfs_dquot {
 	xfs_qcnt_t	 q_res_bcount;	/* total regular nblks used+reserved */
 	xfs_qcnt_t	 q_res_icount;	/* total inos allocd+reserved */
 	xfs_qcnt_t	 q_res_rtbcount;/* total realtime blks used+reserved */
+	uint64_t	 q_ina_total;	/* inactive inodes attached here */
+	xfs_qcnt_t	 q_ina_bcount;	/* inactive regular nblks used+reserved */
+	xfs_qcnt_t	 q_ina_icount;	/* inactive inos allocd+reserved */
+	xfs_qcnt_t	 q_ina_rtbcount;/* inactive realtime blks used+reserved */
 	xfs_qcnt_t	 q_prealloc_lo_wmark;/* prealloc throttle wmark */
 	xfs_qcnt_t	 q_prealloc_hi_wmark;/* prealloc disabled wmark */
 	int64_t		 q_low_space[XFS_QLOWSP_MAX];
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 9689479ae67d..78c88a8c947a 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -41,6 +41,8 @@ 
 #include "xfs_bmap_btree.h"
 #include "xfs_reflink.h"
 #include "xfs_dir2_priv.h"
+#include "xfs_dquot_item.h"
+#include "xfs_dquot.h"
 
 kmem_zone_t *xfs_inode_zone;
 
@@ -1836,6 +1838,8 @@  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 52ed7904df10..116b24c980fd 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -426,6 +426,19 @@  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 b3190890f096..ba058b8da8a8 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -626,8 +626,8 @@  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);
@@ -636,7 +636,8 @@  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 55b798265ef7..bd95a0738086 100644
--- a/fs/xfs/xfs_quota.h
+++ b/fs/xfs/xfs_quota.h
@@ -103,7 +103,8 @@  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,
@@ -145,6 +146,7 @@  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 6fcc893dfc91..5127f91ce3fd 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -901,6 +901,7 @@  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);