LXR linux/fs/xfs/libxfs/xfs

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * Copyright (C) 2016 Oracle.  All Rights Reserved.
   4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
   5 */
   6#ifndef __XFS_DEFER_H__
   7#define __XFS_DEFER_H__
   8
   9struct xfs_btree_cur;
  10struct xfs_defer_op_type;
  11
  12/*
  13 * Header for deferred operation list.
  14 */
  15enum xfs_defer_ops_type {
  16        XFS_DEFER_OPS_TYPE_BMAP,
  17        XFS_DEFER_OPS_TYPE_REFCOUNT,
  18        XFS_DEFER_OPS_TYPE_RMAP,
  19        XFS_DEFER_OPS_TYPE_FREE,
  20        XFS_DEFER_OPS_TYPE_AGFL_FREE,
  21        XFS_DEFER_OPS_TYPE_MAX,
  22};
  23
  24/*
  25 * Save a log intent item and a list of extents, so that we can replay
  26 * whatever action had to happen to the extent list and file the log done
  27 * item.
  28 */
  29struct xfs_defer_pending {
  30        struct list_head                dfp_list;       /* pending items */
  31        struct list_head                dfp_work;       /* work items */
  32        struct xfs_log_item             *dfp_intent;    /* log intent item */
  33        struct xfs_log_item             *dfp_done;      /* log done item */
  34        unsigned int                    dfp_count;      /* # extent items */
  35        enum xfs_defer_ops_type         dfp_type;
  36};
  37
  38void xfs_defer_add(struct xfs_trans *tp, enum xfs_defer_ops_type type,
  39                struct list_head *h);
  40int xfs_defer_finish_noroll(struct xfs_trans **tp);
  41int xfs_defer_finish(struct xfs_trans **tp);
  42void xfs_defer_cancel(struct xfs_trans *);
  43void xfs_defer_move(struct xfs_trans *dtp, struct xfs_trans *stp);
  44
  45/* Description of a deferred type. */
  46struct xfs_defer_op_type {
  47        struct xfs_log_item *(*create_intent)(struct xfs_trans *tp,
  48                        struct list_head *items, unsigned int count, bool sort);
  49        void (*abort_intent)(struct xfs_log_item *intent);
  50        struct xfs_log_item *(*create_done)(struct xfs_trans *tp,
  51                        struct xfs_log_item *intent, unsigned int count);
  52        int (*finish_item)(struct xfs_trans *tp, struct xfs_log_item *done,
  53                        struct list_head *item, struct xfs_btree_cur **state);
  54        void (*finish_cleanup)(struct xfs_trans *tp,
  55                        struct xfs_btree_cur *state, int error);
  56        void (*cancel_item)(struct list_head *item);
  57        unsigned int            max_items;
  58};
  59
  60extern const struct xfs_defer_op_type xfs_bmap_update_defer_type;
  61extern const struct xfs_defer_op_type xfs_refcount_update_defer_type;
  62extern const struct xfs_defer_op_type xfs_rmap_update_defer_type;
  63extern const struct xfs_defer_op_type xfs_extent_free_defer_type;
  64extern const struct xfs_defer_op_type xfs_agfl_free_defer_type;
  65
  66#endif /* __XFS_DEFER_H__ */
  67