/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright (C) 2016 Oracle. All Rights Reserved. * Author: Darrick J. Wong */ #ifndef __XFS_DEFER_H__ #define __XFS_DEFER_H__ struct xfs_btree_cur; struct xfs_defer_op_type; struct xfs_defer_capture; /* * Header for deferred operation list. */ enum xfs_defer_ops_type { XFS_DEFER_OPS_TYPE_BMAP, XFS_DEFER_OPS_TYPE_REFCOUNT, XFS_DEFER_OPS_TYPE_RMAP, XFS_DEFER_OPS_TYPE_FREE, XFS_DEFER_OPS_TYPE_AGFL_FREE, XFS_DEFER_OPS_TYPE_MAX, }; /* * Save a log intent item and a list of extents, so that we can replay * whatever action had to happen to the extent list and file the log done * item. */ struct xfs_defer_pending { struct list_head dfp_list; /* pending items */ struct list_head dfp_work; /* work items */ struct xfs_log_item *dfp_intent; /* log intent item */ struct xfs_log_item *dfp_done; /* log done item */ unsigned int dfp_count; /* # extent items */ enum xfs_defer_ops_type dfp_type; }; void xfs_defer_add(struct xfs_trans *tp, enum xfs_defer_ops_type type, struct list_head *h); int xfs_defer_finish_noroll(struct xfs_trans **tp); int xfs_defer_finish(struct xfs_trans **tp); void xfs_defer_cancel(struct xfs_trans *); void xfs_defer_move(struct xfs_trans *dtp, struct xfs_trans *stp); /* Description of a deferred type. */ struct xfs_defer_op_type { struct xfs_log_item *(*create_intent)(struct xfs_trans *tp, struct list_head *items, unsigned int count, bool sort); void (*abort_intent)(struct xfs_log_item *intent); struct xfs_log_item *(*create_done)(struct xfs_trans *tp, struct xfs_log_item *intent, unsigned int count); int (*finish_item)(struct xfs_trans *tp, struct xfs_log_item *done, struct list_head *item, struct xfs_btree_cur **state); void (*finish_cleanup)(struct xfs_trans *tp, struct xfs_btree_cur *state, int error); void (*cancel_item)(struct list_head *item); unsigned int max_items; }; extern const struct xfs_defer_op_type xfs_bmap_update_defer_type; extern const struct xfs_defer_op_type xfs_refcount_update_defer_type; extern const struct xfs_defer_op_type xfs_rmap_update_defer_type; extern const struct xfs_defer_op_type xfs_extent_free_defer_type; extern const struct xfs_defer_op_type xfs_agfl_free_defer_type; /* * This structure enables a dfops user to detach the chain of deferred * operations from a transaction so that they can be continued later. */ struct xfs_defer_capture { /* List of other capture structures. */ struct list_head dfc_list; /* Deferred ops state saved from the transaction. */ struct list_head dfc_dfops; unsigned int dfc_tpflags; /* Block reservations for the data and rt devices. */ unsigned int dfc_blkres; unsigned int dfc_rtxres; }; /* * Functions to capture a chain of deferred operations and continue them later. * This doesn't normally happen except log recovery. */ int xfs_defer_ops_capture_and_commit(struct xfs_trans *tp, struct list_head *capture_list); void xfs_defer_ops_continue(struct xfs_defer_capture *d, struct xfs_trans *tp); void xfs_defer_ops_release(struct xfs_mount *mp, struct xfs_defer_capture *d); #endif /* __XFS_DEFER_H__ */