xfs: refactor recovered BUI log item playback

Move the code that processes the log items created from the recovered
log items into the per-item source code files and use dispatch functions
to call them.  No functional changes.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

fs/xfs/xfs_bmap_item.c

@@ -28,6 +28,8 @@
 kmem_zone_t	*xfs_bui_zone;
 kmem_zone_t	*xfs_bud_zone;
 
+static const struct xfs_item_ops xfs_bui_item_ops;
+
 static inline struct xfs_bui_log_item *BUI_ITEM(struct xfs_log_item *lip)
 {
 	return container_of(lip, struct xfs_bui_log_item, bui_item);
@@ -47,7 +49,7 @@ xfs_bui_item_free(
  * committed vs unpin operations in bulk insert operations. Hence the reference
  * count to ensure only the last caller frees the BUI.
  */
-void
+STATIC void
 xfs_bui_release(
 	struct xfs_bui_log_item	*buip)
 {
@@ -126,13 +128,6 @@ xfs_bui_item_release(
 	xfs_bui_release(BUI_ITEM(lip));
 }
 
-static const struct xfs_item_ops xfs_bui_item_ops = {
-	.iop_size	= xfs_bui_item_size,
-	.iop_format	= xfs_bui_item_format,
-	.iop_unpin	= xfs_bui_item_unpin,
-	.iop_release	= xfs_bui_item_release,
-};
-
 /*
  * Allocate and initialize an bui item with the given number of extents.
  */
@@ -425,7 +420,7 @@ const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
  * Process a bmap update intent item that was recovered from the log.
  * We need to update some inode's bmbt.
  */
-int
+STATIC int
 xfs_bui_recover(
 	struct xfs_trans		*parent_tp,
 	struct xfs_bui_log_item		*buip)
@@ -560,6 +555,37 @@ xfs_bui_recover(
 	return error;
 }
 
+/* Recover the BUI if necessary. */
+STATIC int
+xfs_bui_item_recover(
+	struct xfs_log_item		*lip,
+	struct xfs_trans		*tp)
+{
+	struct xfs_ail			*ailp = lip->li_ailp;
+	struct xfs_bui_log_item		*buip = BUI_ITEM(lip);
+	int				error;
+
+	/*
+	 * Skip BUIs that we've already processed.
+	 */
+	if (test_bit(XFS_BUI_RECOVERED, &buip->bui_flags))
+		return 0;
+
+	spin_unlock(&ailp->ail_lock);
+	error = xfs_bui_recover(tp, buip);
+	spin_lock(&ailp->ail_lock);
+
+	return error;
+}
+
+static const struct xfs_item_ops xfs_bui_item_ops = {
+	.iop_size	= xfs_bui_item_size,
+	.iop_format	= xfs_bui_item_format,
+	.iop_unpin	= xfs_bui_item_unpin,
+	.iop_release	= xfs_bui_item_release,
+	.iop_recover	= xfs_bui_item_recover,
+};
+
 /*
  * Copy an BUI format buffer from the given buf, and into the destination
  * BUI format structure.  The BUI/BUD items were designed not to need any

fs/xfs/xfs_bmap_item.h

@@ -74,7 +74,4 @@ struct xfs_bud_log_item {
 extern struct kmem_zone	*xfs_bui_zone;
 extern struct kmem_zone	*xfs_bud_zone;
 
-void xfs_bui_release(struct xfs_bui_log_item *);
-int xfs_bui_recover(struct xfs_trans *parent_tp, struct xfs_bui_log_item *buip);
-
 #endif	/* __XFS_BMAP_ITEM_H__ */

fs/xfs/xfs_log_recover.c

@@ -2546,46 +2546,6 @@ xlog_recover_process_data(
 	return 0;
 }
 
-/* Recover the BUI if necessary. */
-STATIC int
-xlog_recover_process_bui(
-	struct xfs_trans		*parent_tp,
-	struct xfs_ail			*ailp,
-	struct xfs_log_item		*lip)
-{
-	struct xfs_bui_log_item		*buip;
-	int				error;
-
-	/*
-	 * Skip BUIs that we've already processed.
-	 */
-	buip = container_of(lip, struct xfs_bui_log_item, bui_item);
-	if (test_bit(XFS_BUI_RECOVERED, &buip->bui_flags))
-		return 0;
-
-	spin_unlock(&ailp->ail_lock);
-	error = xfs_bui_recover(parent_tp, buip);
-	spin_lock(&ailp->ail_lock);
-
-	return error;
-}
-
-/* Release the BUI since we're cancelling everything. */
-STATIC void
-xlog_recover_cancel_bui(
-	struct xfs_mount		*mp,
-	struct xfs_ail			*ailp,
-	struct xfs_log_item		*lip)
-{
-	struct xfs_bui_log_item		*buip;
-
-	buip = container_of(lip, struct xfs_bui_log_item, bui_item);
-
-	spin_unlock(&ailp->ail_lock);
-	xfs_bui_release(buip);
-	spin_lock(&ailp->ail_lock);
-}
-
 /* Is this log item a deferred action intent? */
 static inline bool xlog_item_is_intent(struct xfs_log_item *lip)
 {
@@ -2704,18 +2664,11 @@ xlog_recover_process_intents(
 
 		/*
 		 * NOTE: If your intent processing routine can create more
-		 * deferred ops, you /must/ attach them to the dfops in this
-		 * routine or else those subsequent intents will get
+		 * deferred ops, you /must/ attach them to the transaction in
+		 * this routine or else those subsequent intents will get
 		 * replayed in the wrong order!
 		 */
-		switch (lip->li_type) {
-		case XFS_LI_BUI:
-			error = xlog_recover_process_bui(parent_tp, ailp, lip);
-			break;
-		default:
 		error = lip->li_ops->iop_recover(lip, parent_tp);
-			break;
-		}
 		if (error)
 			goto out;
 		lip = xfs_trans_ail_cursor_next(ailp, &cur);
@@ -2758,17 +2711,9 @@ xlog_recover_cancel_intents(
 			break;
 		}
 
-		switch (lip->li_type) {
-		case XFS_LI_BUI:
-			xlog_recover_cancel_bui(log->l_mp, ailp, lip);
-			break;
-		default:
 		spin_unlock(&ailp->ail_lock);
 		lip->li_ops->iop_release(lip);
 		spin_lock(&ailp->ail_lock);
-			break;
-		}
-
 		lip = xfs_trans_ail_cursor_next(ailp, &cur);
 	}