mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-30 08:04:13 +08:00
889eb55dd6
Rename XFS_{EFI,BUI,RUI,CUI}_RECOVERED to XFS_LI_RECOVERED so that we
track recovery status in the log item, then get rid of the now unused
flags fields in each of those log item types.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
75 lines
2.4 KiB
C
75 lines
2.4 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_RMAP_ITEM_H__
|
|
#define __XFS_RMAP_ITEM_H__
|
|
|
|
/*
|
|
* There are (currently) three pairs of rmap btree redo item types: map, unmap,
|
|
* and convert. The common abbreviations for these are RUI (rmap update
|
|
* intent) and RUD (rmap update done). The redo item type is encoded in the
|
|
* flags field of each xfs_map_extent.
|
|
*
|
|
* *I items should be recorded in the *first* of a series of rolled
|
|
* transactions, and the *D items should be recorded in the same transaction
|
|
* that records the associated rmapbt updates. Typically, the first
|
|
* transaction will record a bmbt update, followed by some number of
|
|
* transactions containing rmapbt updates, and finally transactions with any
|
|
* bnobt/cntbt updates.
|
|
*
|
|
* Should the system crash after the commit of the first transaction but
|
|
* before the commit of the final transaction in a series, log recovery will
|
|
* use the redo information recorded by the intent items to replay the
|
|
* (rmapbt/bnobt/cntbt) metadata updates in the non-first transaction.
|
|
*/
|
|
|
|
/* kernel only RUI/RUD definitions */
|
|
|
|
struct xfs_mount;
|
|
struct kmem_zone;
|
|
|
|
/*
|
|
* Max number of extents in fast allocation path.
|
|
*/
|
|
#define XFS_RUI_MAX_FAST_EXTENTS 16
|
|
|
|
/*
|
|
* This is the "rmap update intent" log item. It is used to log the fact that
|
|
* some reverse mappings need to change. It is used in conjunction with the
|
|
* "rmap update done" log item described below.
|
|
*
|
|
* These log items follow the same rules as struct xfs_efi_log_item; see the
|
|
* comments about that structure (in xfs_extfree_item.h) for more details.
|
|
*/
|
|
struct xfs_rui_log_item {
|
|
struct xfs_log_item rui_item;
|
|
atomic_t rui_refcount;
|
|
atomic_t rui_next_extent;
|
|
struct xfs_rui_log_format rui_format;
|
|
};
|
|
|
|
static inline size_t
|
|
xfs_rui_log_item_sizeof(
|
|
unsigned int nr)
|
|
{
|
|
return offsetof(struct xfs_rui_log_item, rui_format) +
|
|
xfs_rui_log_format_sizeof(nr);
|
|
}
|
|
|
|
/*
|
|
* This is the "rmap update done" log item. It is used to log the fact that
|
|
* some rmapbt updates mentioned in an earlier rui item have been performed.
|
|
*/
|
|
struct xfs_rud_log_item {
|
|
struct xfs_log_item rud_item;
|
|
struct xfs_rui_log_item *rud_ruip;
|
|
struct xfs_rud_log_format rud_format;
|
|
};
|
|
|
|
extern struct kmem_zone *xfs_rui_zone;
|
|
extern struct kmem_zone *xfs_rud_zone;
|
|
|
|
#endif /* __XFS_RMAP_ITEM_H__ */
|