4 files changed, 56 insertions, 0 deletions

diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index f642884a6834..6b5e3cf40c8b 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -54,6 +54,16 @@ struct xfs_dquot_res {
 	xfs_qwarncnt_t		warnings;
 };
 
+static inline bool
+xfs_dquot_res_over_limits(
+	const struct xfs_dquot_res	*qres)
+{
+	if ((qres->softlimit && qres->softlimit < qres->reserved) ||
+	    (qres->hardlimit && qres->hardlimit < qres->reserved))
+		return true;
+	return false;
+}
+
 /*
  * The incore dquot structure
  */
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 8b2ac969c60c..0bea604f320a 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1921,6 +1921,7 @@ xfs_inodegc_start(
  *
  *  - We've accumulated more than one inode cluster buffer's worth of inodes.
  *  - There is less than 5% free space left.
+ *  - Any of the quotas for this inode are near an enforcement limit.
  */
 static inline bool
 xfs_inodegc_want_queue_work(
@@ -1937,6 +1938,15 @@ xfs_inodegc_want_queue_work(
 				XFS_FDBLOCKS_BATCH) < 0)
 		return true;
 
+	if (xfs_inode_near_dquot_enforcement(ip, XFS_DQTYPE_USER))
+		return true;
+
+	if (xfs_inode_near_dquot_enforcement(ip, XFS_DQTYPE_GROUP))
+		return true;
+
+	if (xfs_inode_near_dquot_enforcement(ip, XFS_DQTYPE_PROJ))
+		return true;
+
 	return false;
 }
 
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 351d99bc52e5..2bef4735d030 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -1882,3 +1882,37 @@ xfs_qm_vop_create_dqattach(
 	}
 }
 
+/* Decide if this inode's dquot is near an enforcement boundary. */
+bool
+xfs_inode_near_dquot_enforcement(
+	struct xfs_inode	*ip,
+	xfs_dqtype_t		type)
+{
+	struct xfs_dquot	*dqp;
+	int64_t			freesp;
+
+	/* We only care for quotas that are enabled and enforced. */
+	dqp = xfs_inode_dquot(ip, type);
+	if (!dqp || !xfs_dquot_is_enforced(dqp))
+		return false;
+
+	if (xfs_dquot_res_over_limits(&dqp->q_ino) ||
+	    xfs_dquot_res_over_limits(&dqp->q_rtb))
+		return true;
+
+	/* For space on the data device, check the various thresholds. */
+	if (!dqp->q_prealloc_hi_wmark)
+		return false;
+
+	if (dqp->q_blk.reserved < dqp->q_prealloc_lo_wmark)
+		return false;
+
+	if (dqp->q_blk.reserved >= dqp->q_prealloc_hi_wmark)
+		return true;
+
+	freesp = dqp->q_prealloc_hi_wmark - dqp->q_blk.reserved;
+	if (freesp < dqp->q_low_space[XFS_QLOWSP_5_PCNT])
+		return true;
+
+	return false;
+}
diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h
index d00d01302545..dcc785fdd345 100644
--- a/fs/xfs/xfs_quota.h
+++ b/fs/xfs/xfs_quota.h
@@ -113,6 +113,7 @@ xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
 {
 	return xfs_trans_reserve_quota_nblks(NULL, ip, blocks, 0, false);
 }
+bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type);
 #else
 static inline int
 xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid,
@@ -168,6 +169,7 @@ xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp,
 #define xfs_qm_mount_quotas(mp)
 #define xfs_qm_unmount(mp)
 #define xfs_qm_unmount_quotas(mp)
+#define xfs_inode_near_dquot_enforcement(ip, type)			(false)
 #endif /* CONFIG_XFS_QUOTA */
 
 static inline int