| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2016 Oracle. All Rights Reserved. |
| * Author: Darrick J. Wong <darrick.wong@oracle.com> |
| */ |
| #ifndef __XFS_DEFER_H__ |
| #define __XFS_DEFER_H__ |
| |
| 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 */ |
| void *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); |
| void *(*create_done)(struct xfs_trans *tp, struct xfs_log_item *intent, |
| unsigned int count); |
| int (*finish_item)(struct xfs_trans *, struct list_head *, void *, |
| void **); |
| void (*finish_cleanup)(struct xfs_trans *, void *, int); |
| void (*cancel_item)(struct list_head *); |
| 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; |
| |
| /* Log reservation saved from the transaction. */ |
| unsigned int dfc_logres; |
| |
| /* |
| * An inode reference that must be maintained to complete the deferred |
| * work. |
| */ |
| struct xfs_inode *dfc_capture_ip; |
| }; |
| |
| /* |
| * 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 xfs_inode *capture_ip, struct list_head *capture_list); |
| void xfs_defer_ops_continue(struct xfs_defer_capture *d, struct xfs_trans *tp, |
| struct xfs_inode **captured_ipp); |
| void xfs_defer_ops_release(struct xfs_mount *mp, struct xfs_defer_capture *d); |
| |
| #endif /* __XFS_DEFER_H__ */ |