132 lines
4.1 KiB
C
132 lines
4.1 KiB
C
/* 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_ATTR,
|
|
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;
|
|
extern const struct xfs_defer_op_type xfs_attr_defer_type;
|
|
|
|
|
|
/*
|
|
* Deferred operation item relogging limits.
|
|
*/
|
|
#define XFS_DEFER_OPS_NR_INODES 2 /* join up to two inodes */
|
|
#define XFS_DEFER_OPS_NR_BUFS 2 /* join up to two buffers */
|
|
|
|
/* Resources that must be held across a transaction roll. */
|
|
struct xfs_defer_resources {
|
|
/* held buffers */
|
|
struct xfs_buf *dr_bp[XFS_DEFER_OPS_NR_BUFS];
|
|
|
|
/* inodes with no unlock flags */
|
|
struct xfs_inode *dr_ip[XFS_DEFER_OPS_NR_INODES];
|
|
|
|
/* number of held buffers */
|
|
unsigned short dr_bufs;
|
|
|
|
/* bitmap of ordered buffers */
|
|
unsigned short dr_ordered;
|
|
|
|
/* number of held inodes */
|
|
unsigned short dr_inos;
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
|
|
struct xfs_defer_resources dfc_held;
|
|
};
|
|
|
|
/*
|
|
* 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,
|
|
struct xfs_defer_resources *dres);
|
|
void xfs_defer_ops_capture_free(struct xfs_mount *mp,
|
|
struct xfs_defer_capture *d);
|
|
void xfs_defer_resources_rele(struct xfs_defer_resources *dres);
|
|
|
|
int __init xfs_defer_init_item_caches(void);
|
|
void xfs_defer_destroy_item_caches(void);
|
|
|
|
#endif /* __XFS_DEFER_H__ */
|