1 files changed, 115 insertions, 16 deletions

diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h
index 6b2ca580f2b0..9effd95ddcd4 100644
--- a/fs/xfs/libxfs/xfs_defer.h
+++ b/fs/xfs/libxfs/xfs_defer.h
@@ -8,18 +8,7 @@
 
 struct xfs_btree_cur;
 struct xfs_defer_op_type;
-
-/*
- * Header for deferred operation list.
- */
-enum xfs_defer_ops_type {
-	XFS_DEFER_OPS_TYPE_BMAP,
-	XFS_DEFER_OPS_TYPE_REFCOUNT,
-	XFS_DEFER_OPS_TYPE_RMAP,
-	XFS_DEFER_OPS_TYPE_FREE,
-	XFS_DEFER_OPS_TYPE_AGFL_FREE,
-	XFS_DEFER_OPS_TYPE_MAX,
-};
+struct xfs_defer_capture;
 
 /*
  * Save a log intent item and a list of extents, so that we can replay
@@ -31,19 +20,35 @@ struct xfs_defer_pending {
 	struct list_head		dfp_work;	/* work items */
 	struct xfs_log_item		*dfp_intent;	/* log intent item */
 	struct xfs_log_item		*dfp_done;	/* log done item */
+	const struct xfs_defer_op_type	*dfp_ops;
 	unsigned int			dfp_count;	/* # extent items */
-	enum xfs_defer_ops_type		dfp_type;
+	unsigned int			dfp_flags;
 };
 
-void xfs_defer_add(struct xfs_trans *tp, enum xfs_defer_ops_type type,
-		struct list_head *h);
+/*
+ * Create a log intent item for this deferred item, but don't actually finish
+ * the work.  Caller must clear this before the final transaction commit.
+ */
+#define XFS_DEFER_PAUSED	(1U << 0)
+
+#define XFS_DEFER_PENDING_STRINGS \
+	{ XFS_DEFER_PAUSED,	"paused" }
+
+void xfs_defer_item_pause(struct xfs_trans *tp, struct xfs_defer_pending *dfp);
+void xfs_defer_item_unpause(struct xfs_trans *tp, struct xfs_defer_pending *dfp);
+
+struct xfs_defer_pending *xfs_defer_add(struct xfs_trans *tp, struct list_head *h,
+		const struct xfs_defer_op_type *ops);
 int xfs_defer_finish_noroll(struct xfs_trans **tp);
 int xfs_defer_finish(struct xfs_trans **tp);
+int xfs_defer_finish_one(struct xfs_trans *tp, struct xfs_defer_pending *dfp);
 void xfs_defer_cancel(struct xfs_trans *);
 void xfs_defer_move(struct xfs_trans *dtp, struct xfs_trans *stp);
 
 /* Description of a deferred type. */
 struct xfs_defer_op_type {
+	const char		*name;
+	unsigned int		max_items;
 	struct xfs_log_item *(*create_intent)(struct xfs_trans *tp,
 			struct list_head *items, unsigned int count, bool sort);
 	void (*abort_intent)(struct xfs_log_item *intent);
@@ -54,13 +59,107 @@ struct xfs_defer_op_type {
 	void (*finish_cleanup)(struct xfs_trans *tp,
 			struct xfs_btree_cur *state, int error);
 	void (*cancel_item)(struct list_head *item);
-	unsigned int		max_items;
+	int (*recover_work)(struct xfs_defer_pending *dfp,
+			    struct list_head *capture_list);
+	struct xfs_log_item *(*relog_intent)(struct xfs_trans *tp,
+			struct xfs_log_item *intent,
+			struct xfs_log_item *done_item);
 };
 
 extern const struct xfs_defer_op_type xfs_bmap_update_defer_type;
 extern const struct xfs_defer_op_type xfs_refcount_update_defer_type;
+extern const struct xfs_defer_op_type xfs_rtrefcount_update_defer_type;
 extern const struct xfs_defer_op_type xfs_rmap_update_defer_type;
+extern const struct xfs_defer_op_type xfs_rtrmap_update_defer_type;
 extern const struct xfs_defer_op_type xfs_extent_free_defer_type;
 extern const struct xfs_defer_op_type xfs_agfl_free_defer_type;
+extern const struct xfs_defer_op_type xfs_rtextent_free_defer_type;
+extern const struct xfs_defer_op_type xfs_attr_defer_type;
+extern const struct xfs_defer_op_type xfs_exchmaps_defer_type;
+
+/*
+ * Deferred operation item relogging limits.
+ */
+
+/*
+ * Rename w/ parent pointers can require up to 5 inodes with deferred ops to
+ * be joined to the transaction: src_dp, target_dp, src_ip, target_ip, and wip.
+ * These inodes are locked in sorted order by their inode numbers
+ */
+#define XFS_DEFER_OPS_NR_INODES	5
+#define XFS_DEFER_OPS_NR_BUFS	2	/* join up to two buffers */
+
+/* Resources that must be held across a transaction roll. */
+struct xfs_defer_resources {
+	/* held buffers */
+	struct xfs_buf		*dr_bp[XFS_DEFER_OPS_NR_BUFS];
+
+	/* inodes with no unlock flags */
+	struct xfs_inode	*dr_ip[XFS_DEFER_OPS_NR_INODES];
+
+	/* number of held buffers */
+	unsigned short		dr_bufs;
+
+	/* bitmap of ordered buffers */
+	unsigned short		dr_ordered;
+
+	/* number of held inodes */
+	unsigned short		dr_inos;
+};
+
+/*
+ * This structure enables a dfops user to detach the chain of deferred
+ * operations from a transaction so that they can be continued later.
+ */
+struct xfs_defer_capture {
+	/* List of other capture structures. */
+	struct list_head	dfc_list;
+
+	/* Deferred ops state saved from the transaction. */
+	struct list_head	dfc_dfops;
+	unsigned int		dfc_tpflags;
+
+	/* Block reservations for the data and rt devices. */
+	unsigned int		dfc_blkres;
+	unsigned int		dfc_rtxres;
+
+	/* Log reservation saved from the transaction. */
+	unsigned int		dfc_logres;
+
+	struct xfs_defer_resources dfc_held;
+};
+
+/*
+ * Functions to capture a chain of deferred operations and continue them later.
+ * This doesn't normally happen except log recovery.
+ */
+int xfs_defer_ops_capture_and_commit(struct xfs_trans *tp,
+		struct list_head *capture_list);
+void xfs_defer_ops_continue(struct xfs_defer_capture *d, struct xfs_trans *tp,
+		struct xfs_defer_resources *dres);
+void xfs_defer_ops_capture_abort(struct xfs_mount *mp,
+		struct xfs_defer_capture *d);
+void xfs_defer_resources_rele(struct xfs_defer_resources *dres);
+
+void xfs_defer_start_recovery(struct xfs_log_item *lip,
+		struct list_head *r_dfops, const struct xfs_defer_op_type *ops);
+void xfs_defer_cancel_recovery(struct xfs_mount *mp,
+		struct xfs_defer_pending *dfp);
+int xfs_defer_finish_recovery(struct xfs_mount *mp,
+		struct xfs_defer_pending *dfp, struct list_head *capture_list);
+
+static inline void
+xfs_defer_add_item(
+	struct xfs_defer_pending	*dfp,
+	struct list_head		*work)
+{
+	list_add_tail(work, &dfp->dfp_work);
+	dfp->dfp_count++;
+}
+
+int __init xfs_defer_init_item_caches(void);
+void xfs_defer_destroy_item_caches(void);
+
+void xfs_defer_add_barrier(struct xfs_trans *tp);
 
 #endif /* __XFS_DEFER_H__ */