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 * Save a log intent item and a list of extents, so that we can replay 13 * whatever action had to happen to the extent list and file the log done 14 * item. 15 */ 16 struct xfs_defer_pending { 17 const struct xfs_defer_op_type *dfp_type; /* function pointers */ 18 struct list_head dfp_list; /* pending items */ 19 void *dfp_intent; /* log intent item */ 20 void *dfp_done; /* log done item */ 21 struct list_head dfp_work; /* work items */ 22 unsigned int dfp_count; /* # extent items */ 23 }; 24 25 /* 26 * Header for deferred operation list. 27 */ 28 enum xfs_defer_ops_type { 29 XFS_DEFER_OPS_TYPE_BMAP, 30 XFS_DEFER_OPS_TYPE_REFCOUNT, 31 XFS_DEFER_OPS_TYPE_RMAP, 32 XFS_DEFER_OPS_TYPE_FREE, 33 XFS_DEFER_OPS_TYPE_AGFL_FREE, 34 XFS_DEFER_OPS_TYPE_MAX, 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 enum xfs_defer_ops_type type; 47 unsigned int max_items; 48 void (*abort_intent)(void *); 49 void *(*create_done)(struct xfs_trans *, void *, unsigned int); 50 int (*finish_item)(struct xfs_trans *, struct list_head *, void *, 51 void **); 52 void (*finish_cleanup)(struct xfs_trans *, void *, int); 53 void (*cancel_item)(struct list_head *); 54 int (*diff_items)(void *, struct list_head *, struct list_head *); 55 void *(*create_intent)(struct xfs_trans *, uint); 56 void (*log_item)(struct xfs_trans *, void *, struct list_head *); 57 }; 58 59 void xfs_defer_init_op_type(const struct xfs_defer_op_type *type); 60 61 #endif /* __XFS_DEFER_H__ */ 62