xfs: use xfs_defer_finish_one to finish recovered work items

Get rid of the open-coded calls to xfs_defer_finish_one.  This also
means that the recovery transaction takes care of cleaning up the dfp,
and we have solved (I hope) all the ownership issues in recovery.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

fs/xfs/libxfs/xfs_defer.c

@@ -484,7 +484,7 @@ xfs_defer_relog(
  * Log an intent-done item for the first pending intent, and finish the work
  * items.
  */
-static int
+int
 xfs_defer_finish_one(
 	struct xfs_trans		*tp,
 	struct xfs_defer_pending	*dfp)

fs/xfs/libxfs/xfs_defer.h

@@ -41,6 +41,7 @@ void xfs_defer_add(struct xfs_trans *tp, enum xfs_defer_ops_type type,
 		struct list_head *h);
 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);
 

fs/xfs/libxfs/xfs_log_recover.h

@@ -155,7 +155,7 @@ xlog_recover_resv(const struct xfs_trans_res *r)
 
 void xlog_recover_intent_item(struct xlog *log, struct xfs_log_item *lip,
 		xfs_lsn_t lsn, unsigned int dfp_type);
-void xlog_recover_transfer_intent(struct xfs_trans *tp,
+int xlog_recover_finish_intent(struct xfs_trans *tp,
 		struct xfs_defer_pending *dfp);
 
 #endif	/* __XFS_LOG_RECOVER_H__ */

fs/xfs/xfs_attr_item.c

@@ -620,7 +620,6 @@ xfs_attri_item_recover(
 	struct xfs_attri_log_nameval	*nv = attrip->attri_nameval;
 	int				error;
 	int				total;
-	struct xfs_attrd_log_item	*done_item = NULL;
 
 	/*
 	 * First check the validity of the attr described by the ATTRI.  If any
@@ -645,27 +644,10 @@ xfs_attri_item_recover(
 		return error;
 	args->trans = tp;
 
-	done_item = xfs_trans_get_attrd(tp, attrip);
-	xlog_recover_transfer_intent(tp, dfp);
-
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
 	xfs_trans_ijoin(tp, ip, 0);
 
-	error = xfs_xattri_finish_update(attr, done_item);
-	if (error == -EAGAIN) {
-		/*
-		 * There's more work to do, so add the intent item to this
-		 * transaction so that we can continue it later.
-		 */
-		xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_ATTR, &attr->xattri_list);
-		error = xfs_defer_ops_capture_and_commit(tp, capture_list);
-		if (error)
-			goto out_unlock;
-
-		xfs_iunlock(ip, XFS_ILOCK_EXCL);
-		xfs_irele(ip);
-		return 0;
-	}
+	error = xlog_recover_finish_intent(tp, dfp);
 	if (error == -EFSCORRUPTED)
 		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
 				&attrip->attri_format,

fs/xfs/xfs_bmap_item.c

@@ -497,6 +497,7 @@ xfs_bui_recover_work(
 	bi->bi_bmap.br_blockcount = map->me_len;
 	bi->bi_bmap.br_state = (map->me_flags & XFS_BMAP_EXTENT_UNWRITTEN) ?
 			XFS_EXT_UNWRITTEN : XFS_EXT_NORM;
+	xfs_bmap_update_get_group(mp, bi);
 
 	xfs_defer_add_item(dfp, &bi->bi_list);
 	return bi;
@@ -518,8 +519,7 @@ xfs_bui_item_recover(
 	struct xfs_inode		*ip = NULL;
 	struct xfs_mount		*mp = lip->li_log->l_mp;
 	struct xfs_map_extent		*map;
-	struct xfs_bud_log_item		*budp;
-	struct xfs_bmap_intent		*fake;
+	struct xfs_bmap_intent		*work;
 	int				iext_delta;
 	int				error = 0;
 
@@ -530,7 +530,7 @@ xfs_bui_item_recover(
 	}
 
 	map = &buip->bui_format.bui_extents[0];
-	fake = xfs_bui_recover_work(mp, dfp, map);
+	work = xfs_bui_recover_work(mp, dfp, map);
 
 	error = xlog_recover_iget(mp, map->me_owner, &ip);
 	if (error)
@@ -543,39 +543,29 @@ xfs_bui_item_recover(
 	if (error)
 		goto err_rele;
 
-	budp = xfs_trans_get_bud(tp, buip);
-	xlog_recover_transfer_intent(tp, dfp);
-
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
 	xfs_trans_ijoin(tp, ip, 0);
 
-	if (fake->bi_type == XFS_BMAP_MAP)
+	if (work->bi_type == XFS_BMAP_MAP)
 		iext_delta = XFS_IEXT_ADD_NOSPLIT_CNT;
 	else
 		iext_delta = XFS_IEXT_PUNCH_HOLE_CNT;
 
-	error = xfs_iext_count_may_overflow(ip, fake->bi_whichfork, iext_delta);
+	error = xfs_iext_count_may_overflow(ip, work->bi_whichfork, iext_delta);
 	if (error == -EFBIG)
 		error = xfs_iext_count_upgrade(tp, ip, iext_delta);
 	if (error)
 		goto err_cancel;
 
-	fake->bi_owner = ip;
+	work->bi_owner = ip;
 
-	xfs_bmap_update_get_group(mp, fake);
-	error = xfs_trans_log_finish_bmap_update(tp, budp, fake);
+	error = xlog_recover_finish_intent(tp, dfp);
 	if (error == -EFSCORRUPTED)
 		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
 				&buip->bui_format, sizeof(buip->bui_format));
-	xfs_bmap_update_put_group(fake);
 	if (error)
 		goto err_cancel;
 
-	if (fake->bi_bmap.br_blockcount > 0) {
-		ASSERT(fake->bi_type == XFS_BMAP_UNMAP);
-		xfs_bmap_unmap_extent(tp, ip, &fake->bi_bmap);
-	}
-
 	/*
 	 * Commit transaction, which frees the transaction and saves the inode
 	 * for later replay activities.

fs/xfs/xfs_extfree_item.c

@@ -665,6 +665,7 @@ xfs_efi_recover_work(
 	xefi->xefi_blockcount = extp->ext_len;
 	xefi->xefi_agresv = XFS_AG_RESV_NONE;
 	xefi->xefi_owner = XFS_RMAP_OWN_UNKNOWN;
+	xfs_extent_free_get_group(mp, xefi);
 
 	xfs_defer_add_item(dfp, &xefi->xefi_list);
 }
@@ -682,12 +683,9 @@ xfs_efi_item_recover(
 	struct xfs_log_item		*lip = dfp->dfp_intent;
 	struct xfs_efi_log_item		*efip = EFI_ITEM(lip);
 	struct xfs_mount		*mp = lip->li_log->l_mp;
-	struct xfs_efd_log_item		*efdp;
 	struct xfs_trans		*tp;
-	struct xfs_extent_free_item	*fake;
 	int				i;
 	int				error = 0;
-	bool				requeue_only = false;
 
 	/*
 	 * First check the validity of the extents described by the
@@ -711,40 +709,13 @@ xfs_efi_item_recover(
 	if (error)
 		return error;
 
-	efdp = xfs_trans_get_efd(tp, efip, efip->efi_format.efi_nextents);
-	xlog_recover_transfer_intent(tp, dfp);
-
-	list_for_each_entry(fake, &dfp->dfp_work, xefi_list) {
-		if (!requeue_only) {
-			xfs_extent_free_get_group(mp, fake);
-			error = xfs_trans_free_extent(tp, efdp, fake);
-			xfs_extent_free_put_group(fake);
-		}
-
-		/*
-		 * If we can't free the extent without potentially deadlocking,
-		 * requeue the rest of the extents to a new so that they get
-		 * run again later with a new transaction context.
-		 */
-		if (error == -EAGAIN || requeue_only) {
-			error = xfs_free_extent_later(tp, fake->xefi_startblock,
-					fake->xefi_blockcount,
-					&XFS_RMAP_OINFO_ANY_OWNER,
-					fake->xefi_agresv);
-			if (!error) {
-				requeue_only = true;
-				continue;
-			}
-		}
-
-		if (error == -EFSCORRUPTED)
-			XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
-					&efip->efi_format,
-					sizeof(efip->efi_format));
-		if (error)
-			goto abort_error;
-
-	}
+	error = xlog_recover_finish_intent(tp, dfp);
+	if (error == -EFSCORRUPTED)
+		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+				&efip->efi_format,
+				sizeof(efip->efi_format));
+	if (error)
+		goto abort_error;
 
 	return xfs_defer_ops_capture_and_commit(tp, capture_list);
 

fs/xfs/xfs_log_recover.c

@@ -2581,16 +2581,15 @@ xlog_recover_process_intents(
 		 * replayed in the wrong order!
 		 *
 		 * The recovery function can free the log item, so we must not
-		 * access lip after it returns.
+		 * access lip after it returns.  It must dispose of @dfp if it
+		 * returns 0.
 		 */
 		error = ops->iop_recover(dfp, &capture_list);
 		if (error) {
 			trace_xlog_intent_recovery_failed(log->l_mp, error,
 					ops->iop_recover);
 			break;
 		}
-
-		xfs_defer_cancel_recovery(log->l_mp, dfp);
 	}
 	if (error)
 		goto err;
@@ -2624,15 +2623,22 @@ xlog_recover_cancel_intents(
 }
 
 /*
- * Transfer ownership of the recovered log intent item to the recovery
- * transaction.
+ * Transfer ownership of the recovered pending work to the recovery transaction
+ * and try to finish the work.  If there is more work to be done, the dfp will
+ * remain attached to the transaction.  If not, the dfp is freed.
  */
-void
-xlog_recover_transfer_intent(
+int
+xlog_recover_finish_intent(
 	struct xfs_trans		*tp,
 	struct xfs_defer_pending	*dfp)
 {
-	dfp->dfp_intent = NULL;
+	int				error;
+
+	list_move(&dfp->dfp_list, &tp->t_dfops);
+	error = xfs_defer_finish_one(tp, dfp);
+	if (error == -EAGAIN)
+		return 0;
+	return error;
 }
 
 /*

fs/xfs/xfs_refcount_item.c

@@ -481,6 +481,7 @@ xfs_cui_recover_work(
 	ri->ri_type = pmap->pe_flags & XFS_REFCOUNT_EXTENT_TYPE_MASK;
 	ri->ri_startblock = pmap->pe_startblock;
 	ri->ri_blockcount = pmap->pe_len;
+	xfs_refcount_update_get_group(mp, ri);
 
 	xfs_defer_add_item(dfp, &ri->ri_list);
 }
@@ -497,12 +498,8 @@ xfs_cui_item_recover(
 	struct xfs_trans_res		resv;
 	struct xfs_log_item		*lip = dfp->dfp_intent;
 	struct xfs_cui_log_item		*cuip = CUI_ITEM(lip);
-	struct xfs_cud_log_item		*cudp;
 	struct xfs_trans		*tp;
-	struct xfs_btree_cur		*rcur = NULL;
 	struct xfs_mount		*mp = lip->li_log->l_mp;
-	struct xfs_refcount_intent	*fake;
-	bool				requeue_only = false;
 	int				i;
 	int				error = 0;
 
@@ -541,59 +538,17 @@ xfs_cui_item_recover(
 	if (error)
 		return error;
 
-	cudp = xfs_trans_get_cud(tp, cuip);
-	xlog_recover_transfer_intent(tp, dfp);
-
-	list_for_each_entry(fake, &dfp->dfp_work, ri_list) {
-		if (!requeue_only) {
-			xfs_refcount_update_get_group(mp, fake);
-			error = xfs_trans_log_finish_refcount_update(tp, cudp,
-					fake, &rcur);
-			xfs_refcount_update_put_group(fake);
-		}
-		if (error == -EFSCORRUPTED)
-			XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
-					&cuip->cui_format,
-					sizeof(cuip->cui_format));
-		if (error)
-			goto abort_error;
-
-		/* Requeue what we didn't finish. */
-		if (fake->ri_blockcount > 0) {
-			struct xfs_bmbt_irec	irec = {
-				.br_startblock	= fake->ri_startblock,
-				.br_blockcount	= fake->ri_blockcount,
-			};
-
-			switch (fake->ri_type) {
-			case XFS_REFCOUNT_INCREASE:
-				xfs_refcount_increase_extent(tp, &irec);
-				break;
-			case XFS_REFCOUNT_DECREASE:
-				xfs_refcount_decrease_extent(tp, &irec);
-				break;
-			case XFS_REFCOUNT_ALLOC_COW:
-				xfs_refcount_alloc_cow_extent(tp,
-						irec.br_startblock,
-						irec.br_blockcount);
-				break;
-			case XFS_REFCOUNT_FREE_COW:
-				xfs_refcount_free_cow_extent(tp,
-						irec.br_startblock,
-						irec.br_blockcount);
-				break;
-			default:
-				ASSERT(0);
-			}
-			requeue_only = true;
-		}
-	}
+	error = xlog_recover_finish_intent(tp, dfp);
+	if (error == -EFSCORRUPTED)
+		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+				&cuip->cui_format,
+				sizeof(cuip->cui_format));
+	if (error)
+		goto abort_error;
 
-	xfs_refcount_finish_one_cleanup(tp, rcur, error);
 	return xfs_defer_ops_capture_and_commit(tp, capture_list);
 
 abort_error:
-	xfs_refcount_finish_one_cleanup(tp, rcur, error);
 	xfs_trans_cancel(tp);
 	return error;
 }

fs/xfs/xfs_rmap_item.c

@@ -546,6 +546,7 @@ xfs_rui_recover_work(
 	ri->ri_bmap.br_blockcount = map->me_len;
 	ri->ri_bmap.br_state = (map->me_flags & XFS_RMAP_EXTENT_UNWRITTEN) ?
 			XFS_EXT_UNWRITTEN : XFS_EXT_NORM;
+	xfs_rmap_update_get_group(mp, ri);
 
 	xfs_defer_add_item(dfp, &ri->ri_list);
 }
@@ -562,11 +563,8 @@ xfs_rui_item_recover(
 	struct xfs_trans_res		resv;
 	struct xfs_log_item		*lip = dfp->dfp_intent;
 	struct xfs_rui_log_item		*ruip = RUI_ITEM(lip);
-	struct xfs_rud_log_item		*rudp;
 	struct xfs_trans		*tp;
-	struct xfs_btree_cur		*rcur = NULL;
 	struct xfs_mount		*mp = lip->li_log->l_mp;
-	struct xfs_rmap_intent		*fake;
 	int				i;
 	int				error = 0;
 
@@ -593,28 +591,17 @@ xfs_rui_item_recover(
 	if (error)
 		return error;
 
-	rudp = xfs_trans_get_rud(tp, ruip);
-	xlog_recover_transfer_intent(tp, dfp);
-
-	list_for_each_entry(fake, &dfp->dfp_work, ri_list) {
-		xfs_rmap_update_get_group(mp, fake);
-		error = xfs_trans_log_finish_rmap_update(tp, rudp, fake,
-				&rcur);
-		if (error == -EFSCORRUPTED)
-			XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
-					&ruip->rui_format,
-					sizeof(ruip->rui_format));
-		xfs_rmap_update_put_group(fake);
-		if (error)
-			goto abort_error;
-
-	}
+	error = xlog_recover_finish_intent(tp, dfp);
+	if (error == -EFSCORRUPTED)
+		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+				&ruip->rui_format,
+				sizeof(ruip->rui_format));
+	if (error)
+		goto abort_error;
 
-	xfs_rmap_finish_one_cleanup(tp, rcur, error);
 	return xfs_defer_ops_capture_and_commit(tp, capture_list);
 
 abort_error:
-	xfs_rmap_finish_one_cleanup(tp, rcur, error);
 	xfs_trans_cancel(tp);
 	return error;
 }