129 lines
4.0 KiB
C
129 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2016 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*/
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#ifndef __XFS_DEFER_H__
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#define __XFS_DEFER_H__
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struct xfs_btree_cur;
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struct xfs_defer_op_type;
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struct xfs_defer_capture;
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/*
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* Header for deferred operation list.
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*/
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enum xfs_defer_ops_type {
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XFS_DEFER_OPS_TYPE_BMAP,
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XFS_DEFER_OPS_TYPE_REFCOUNT,
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XFS_DEFER_OPS_TYPE_RMAP,
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XFS_DEFER_OPS_TYPE_FREE,
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XFS_DEFER_OPS_TYPE_AGFL_FREE,
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XFS_DEFER_OPS_TYPE_MAX,
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};
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/*
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* Save a log intent item and a list of extents, so that we can replay
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* whatever action had to happen to the extent list and file the log done
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* item.
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*/
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struct xfs_defer_pending {
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struct list_head dfp_list; /* pending items */
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struct list_head dfp_work; /* work items */
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struct xfs_log_item *dfp_intent; /* log intent item */
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struct xfs_log_item *dfp_done; /* log done item */
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unsigned int dfp_count; /* # extent items */
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enum xfs_defer_ops_type dfp_type;
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};
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void xfs_defer_add(struct xfs_trans *tp, enum xfs_defer_ops_type type,
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struct list_head *h);
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int xfs_defer_finish_noroll(struct xfs_trans **tp);
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int xfs_defer_finish(struct xfs_trans **tp);
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void xfs_defer_cancel(struct xfs_trans *);
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void xfs_defer_move(struct xfs_trans *dtp, struct xfs_trans *stp);
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/* Description of a deferred type. */
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struct xfs_defer_op_type {
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struct xfs_log_item *(*create_intent)(struct xfs_trans *tp,
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struct list_head *items, unsigned int count, bool sort);
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void (*abort_intent)(struct xfs_log_item *intent);
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struct xfs_log_item *(*create_done)(struct xfs_trans *tp,
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struct xfs_log_item *intent, unsigned int count);
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int (*finish_item)(struct xfs_trans *tp, struct xfs_log_item *done,
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struct list_head *item, struct xfs_btree_cur **state);
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void (*finish_cleanup)(struct xfs_trans *tp,
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struct xfs_btree_cur *state, int error);
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void (*cancel_item)(struct list_head *item);
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unsigned int max_items;
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};
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extern const struct xfs_defer_op_type xfs_bmap_update_defer_type;
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extern const struct xfs_defer_op_type xfs_refcount_update_defer_type;
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extern const struct xfs_defer_op_type xfs_rmap_update_defer_type;
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extern const struct xfs_defer_op_type xfs_extent_free_defer_type;
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extern const struct xfs_defer_op_type xfs_agfl_free_defer_type;
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/*
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* Deferred operation item relogging limits.
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*/
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#define XFS_DEFER_OPS_NR_INODES 2 /* join up to two inodes */
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#define XFS_DEFER_OPS_NR_BUFS 2 /* join up to two buffers */
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/* Resources that must be held across a transaction roll. */
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struct xfs_defer_resources {
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/* held buffers */
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struct xfs_buf *dr_bp[XFS_DEFER_OPS_NR_BUFS];
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/* inodes with no unlock flags */
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struct xfs_inode *dr_ip[XFS_DEFER_OPS_NR_INODES];
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/* number of held buffers */
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unsigned short dr_bufs;
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/* bitmap of ordered buffers */
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unsigned short dr_ordered;
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/* number of held inodes */
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unsigned short dr_inos;
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};
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/*
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* This structure enables a dfops user to detach the chain of deferred
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* operations from a transaction so that they can be continued later.
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*/
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struct xfs_defer_capture {
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/* List of other capture structures. */
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struct list_head dfc_list;
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/* Deferred ops state saved from the transaction. */
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struct list_head dfc_dfops;
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unsigned int dfc_tpflags;
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/* Block reservations for the data and rt devices. */
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unsigned int dfc_blkres;
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unsigned int dfc_rtxres;
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/* Log reservation saved from the transaction. */
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unsigned int dfc_logres;
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struct xfs_defer_resources dfc_held;
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};
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/*
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* Functions to capture a chain of deferred operations and continue them later.
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* This doesn't normally happen except log recovery.
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*/
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int xfs_defer_ops_capture_and_commit(struct xfs_trans *tp,
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struct list_head *capture_list);
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void xfs_defer_ops_continue(struct xfs_defer_capture *d, struct xfs_trans *tp,
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struct xfs_defer_resources *dres);
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void xfs_defer_ops_capture_free(struct xfs_mount *mp,
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struct xfs_defer_capture *d);
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void xfs_defer_resources_rele(struct xfs_defer_resources *dres);
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int __init xfs_defer_init_item_caches(void);
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void xfs_defer_destroy_item_caches(void);
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#endif /* __XFS_DEFER_H__ */
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