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_btree_cur; 10 struct xfs_defer_op_type; 11 12 /* 13 * Header for deferred operation list. 14 */ 15 enum 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 */ 29 struct 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 38 void xfs_defer_add(struct xfs_trans *tp, 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_move(struct xfs_trans *dtp, struct xfs_trans *stp); 44 45 /* Description of a deferred type. */ 46 struct 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 60 extern const struct xfs_defer_op_type xfs_bmap_update_defer_type; 61 extern const struct xfs_defer_op_type xfs_refcount_update_defer_type; 62 extern const struct xfs_defer_op_type xfs_rmap_update_defer_type; 63 extern const struct xfs_defer_op_type xfs_extent_free_defer_type; 64 extern const struct xfs_defer_op_type xfs_agfl_free_defer_type; 65 66 #endif /* __XFS_DEFER_H__ */ 67