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_defer_op_type;
  10
  11/*
  12 * Header for deferred operation list.
  13 */
  14enum xfs_defer_ops_type {
  15        XFS_DEFER_OPS_TYPE_BMAP,
  16        XFS_DEFER_OPS_TYPE_REFCOUNT,
  17        XFS_DEFER_OPS_TYPE_RMAP,
  18        XFS_DEFER_OPS_TYPE_FREE,
  19        XFS_DEFER_OPS_TYPE_AGFL_FREE,
  20        XFS_DEFER_OPS_TYPE_MAX,
  21};
  22
  23/*
  24 * Save a log intent item and a list of extents, so that we can replay
  25 * whatever action had to happen to the extent list and file the log done
  26 * item.
  27 */
  28struct xfs_defer_pending {
  29        struct list_head                dfp_list;       /* pending items */
  30        struct list_head                dfp_work;       /* work items */
  31        void                            *dfp_intent;    /* log intent item */
  32        void                            *dfp_done;      /* log done item */
  33        unsigned int                    dfp_count;      /* # extent items */
  34        enum xfs_defer_ops_type         dfp_type;
  35};
  36
  37void xfs_defer_add(struct xfs_trans *tp, enum xfs_defer_ops_type type,
  38                struct list_head *h);
  39int xfs_defer_finish_noroll(struct xfs_trans **tp);
  40int xfs_defer_finish(struct xfs_trans **tp);
  41void xfs_defer_cancel(struct xfs_trans *);
  42void xfs_defer_move(struct xfs_trans *dtp, struct xfs_trans *stp);
  43
  44/* Description of a deferred type. */
  45struct xfs_defer_op_type {
  46        void (*abort_intent)(void *);
  47        void *(*create_done)(struct xfs_trans *, void *, unsigned int);
  48        int (*finish_item)(struct xfs_trans *, struct list_head *, void *,
  49                        void **);
  50        void (*finish_cleanup)(struct xfs_trans *, void *, int);
  51        void (*cancel_item)(struct list_head *);
  52        int (*diff_items)(void *, struct list_head *, struct list_head *);
  53        void *(*create_intent)(struct xfs_trans *, uint);
  54        void (*log_item)(struct xfs_trans *, void *, struct list_head *);
  55        unsigned int            max_items;
  56};
  57
  58extern const struct xfs_defer_op_type xfs_bmap_update_defer_type;
  59extern const struct xfs_defer_op_type xfs_refcount_update_defer_type;
  60extern const struct xfs_defer_op_type xfs_rmap_update_defer_type;
  61extern const struct xfs_defer_op_type xfs_extent_free_defer_type;
  62extern const struct xfs_defer_op_type xfs_agfl_free_defer_type;
  63
  64#endif /* __XFS_DEFER_H__ */
  65