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131 lines
4.1 KiB
131 lines
4.1 KiB
/* 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 <[email protected]> |
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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_ATTR, |
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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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extern const struct xfs_defer_op_type xfs_attr_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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