libxfs/xfs_defer.h

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