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 11 /* 12 * Header for deferred operation list. 13 */ 14 enum 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 */ 28 struct 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 37 void xfs_defer_add(struct xfs_trans *tp, enum xfs_defer_ops_type type, 38 struct list_head *h); 39 int xfs_defer_finish_noroll(struct xfs_trans **tp); 40 int xfs_defer_finish(struct xfs_trans **tp); 41 void xfs_defer_cancel(struct xfs_trans *); 42 void xfs_defer_move(struct xfs_trans *dtp, struct xfs_trans *stp); 43 44 /* Description of a deferred type. */ 45 struct 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 58 extern const struct xfs_defer_op_type xfs_bmap_update_defer_type; 59 extern const struct xfs_defer_op_type xfs_refcount_update_defer_type; 60 extern const struct xfs_defer_op_type xfs_rmap_update_defer_type; 61 extern const struct xfs_defer_op_type xfs_extent_free_defer_type; 62 extern const struct xfs_defer_op_type xfs_agfl_free_defer_type; 63 64 #endif /* __XFS_DEFER_H__ */ 65