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Diffstat (limited to 'fs/xfs/libxfs/xfs_defer.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_defer.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h new file mode 100644 index 000000000..05472f71f --- /dev/null +++ b/fs/xfs/libxfs/xfs_defer.h @@ -0,0 +1,103 @@ +/* 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_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; + + /* 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__ */ |