xfs: add a flag to release log items on commit

We have various items that are released from ->iop_comitting. Add a
flag to just call ->iop_release from the commit path to avoid tons
of boilerplate code.

Signed-off-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Brian Foster <[e-mail]>
Reviewed-by: Darrick J. Wong <[e-mail]>
Signed-off-by: Darrick J. Wong <[e-mail]>

fs/xfs/xfs_bmap_item.c

···
 }
 
 /*
- * When the bud item is committed to disk, all we need to do is delete our
- * reference to our partner bui item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from
- * further referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_bud_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	struct xfs_bud_log_item	*budp = BUD_ITEM(lip);
-
-	/*
-	 * Drop the BUI reference regardless of whether the BUD has been
-	 * aborted. Once the BUD transaction is constructed, it is the sole
-	 * responsibility of the BUD to release the BUI (even if the BUI is
-	 * aborted due to log I/O error).
-	 */
-	xfs_bui_release(budp->bud_buip);
-	kmem_zone_free(xfs_bud_zone, budp);
-
-	return (xfs_lsn_t)-1;
-}
-
-/*
  * This is the ops vector shared by all bud log items.
  */
 static const struct xfs_item_ops xfs_bud_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_WHEN_COMMITTED,
 	.iop_size	= xfs_bud_item_size,
 	.iop_format	= xfs_bud_item_format,
 	.iop_release	= xfs_bud_item_release,
-	.iop_committed	= xfs_bud_item_committed,
 };
 
 /*

fs/xfs/xfs_extfree_item.c

···
 }
 
 /*
- * When the efd item is committed to disk, all we need to do is delete our
- * reference to our partner efi item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from further
- * referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_efd_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	struct xfs_efd_log_item	*efdp = EFD_ITEM(lip);
-
-	/*
-	 * Drop the EFI reference regardless of whether the EFD has been
-	 * aborted. Once the EFD transaction is constructed, it is the sole
-	 * responsibility of the EFD to release the EFI (even if the EFI is
-	 * aborted due to log I/O error).
-	 */
-	xfs_efi_release(efdp->efd_efip);
-	xfs_efd_item_free(efdp);
-
-	return (xfs_lsn_t)-1;
-}
-
-/*
  * This is the ops vector shared by all efd log items.
  */
 static const struct xfs_item_ops xfs_efd_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_WHEN_COMMITTED,
 	.iop_size	= xfs_efd_item_size,
 	.iop_format	= xfs_efd_item_format,
 	.iop_release	= xfs_efd_item_release,
-	.iop_committed	= xfs_efd_item_committed,
 };
 
 /*

fs/xfs/xfs_icreate_item.c

···
 }
 
 /*
- * Because we have ordered buffers being tracked in the AIL for the inode
- * creation, we don't need the create item after this. Hence we can free
- * the log item and return -1 to tell the caller we're done with the item.
- */
-STATIC xfs_lsn_t
-xfs_icreate_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	struct xfs_icreate_item	*icp = ICR_ITEM(lip);
-
-	kmem_zone_free(xfs_icreate_zone, icp);
-	return (xfs_lsn_t)-1;
-}
-
-/*
  * This is the ops vector shared by all buf log items.
  */
 static const struct xfs_item_ops xfs_icreate_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_WHEN_COMMITTED,
 	.iop_size	= xfs_icreate_item_size,
 	.iop_format	= xfs_icreate_item_format,
 	.iop_release	= xfs_icreate_item_release,
-	.iop_committed	= xfs_icreate_item_committed,
 };
 
 

fs/xfs/xfs_refcount_item.c

···
 }
 
 /*
- * When the cud item is committed to disk, all we need to do is delete our
- * reference to our partner cui item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from
- * further referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_cud_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	struct xfs_cud_log_item	*cudp = CUD_ITEM(lip);
-
-	/*
-	 * Drop the CUI reference regardless of whether the CUD has been
-	 * aborted. Once the CUD transaction is constructed, it is the sole
-	 * responsibility of the CUD to release the CUI (even if the CUI is
-	 * aborted due to log I/O error).
-	 */
-	xfs_cui_release(cudp->cud_cuip);
-	kmem_zone_free(xfs_cud_zone, cudp);
-
-	return (xfs_lsn_t)-1;
-}
-
-/*
  * This is the ops vector shared by all cud log items.
  */
 static const struct xfs_item_ops xfs_cud_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_WHEN_COMMITTED,
 	.iop_size	= xfs_cud_item_size,
 	.iop_format	= xfs_cud_item_format,
 	.iop_release	= xfs_cud_item_release,
-	.iop_committed	= xfs_cud_item_committed,
 };
 
 /*

fs/xfs/xfs_rmap_item.c

···
 }
 
 /*
- * When the rud item is committed to disk, all we need to do is delete our
- * reference to our partner rui item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from
- * further referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_rud_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	struct xfs_rud_log_item	*rudp = RUD_ITEM(lip);
-
-	/*
-	 * Drop the RUI reference regardless of whether the RUD has been
-	 * aborted. Once the RUD transaction is constructed, it is the sole
-	 * responsibility of the RUD to release the RUI (even if the RUI is
-	 * aborted due to log I/O error).
-	 */
-	xfs_rui_release(rudp->rud_ruip);
-	kmem_zone_free(xfs_rud_zone, rudp);
-
-	return (xfs_lsn_t)-1;
-}
-
-/*
  * This is the ops vector shared by all rud log items.
  */
 static const struct xfs_item_ops xfs_rud_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_WHEN_COMMITTED,
 	.iop_size	= xfs_rud_item_size,
 	.iop_format	= xfs_rud_item_format,
 	.iop_release	= xfs_rud_item_release,
-	.iop_committed	= xfs_rud_item_committed,
 };
 
 /*

fs/xfs/xfs_trans.c

···
 
 		if (aborted)
 			set_bit(XFS_LI_ABORTED, &lip->li_flags);
+
+		if (lip->li_ops->flags & XFS_ITEM_RELEASE_WHEN_COMMITTED) {
+			lip->li_ops->iop_release(lip);
+			continue;
+		}
+
 		if (lip->li_ops->iop_committed)
 			item_lsn = lip->li_ops->iop_committed(lip, commit_lsn);
 		else

fs/xfs/xfs_trans.h

···
 	{ (1 << XFS_LI_DIRTY),		"DIRTY" }
 
 struct xfs_item_ops {
+	unsigned flags;
 	void (*iop_size)(xfs_log_item_t *, int *, int *);
 	void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *);
 	void (*iop_pin)(xfs_log_item_t *);
···
 	xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
 	void (*iop_error)(xfs_log_item_t *, xfs_buf_t *);
 };
+
+/*
+ * Release the log item as soon as committed.  This is for items just logging
+ * intents that never need to be written back in place.
+ */
+#define XFS_ITEM_RELEASE_WHEN_COMMITTED	(1 << 0)
 
 void	xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
 			  int type, const struct xfs_item_ops *ops);