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86ffa471d9
Create a generic dispatch structure to delegate recovery of different log item types into various code modules. This will enable us to move code specific to a particular log item type out of xfs_log_recover.c and into the log item source. The first operation we virtualize is the log item sorting. 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>
96 lines
3.0 KiB
C
96 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_LOG_RECOVER_H__
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#define __XFS_LOG_RECOVER_H__
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/*
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* Each log item type (XFS_LI_*) gets its own xlog_recover_item_ops to
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* define how recovery should work for that type of log item.
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*/
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struct xlog_recover_item;
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/* Sorting hat for log items as they're read in. */
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enum xlog_recover_reorder {
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XLOG_REORDER_BUFFER_LIST,
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XLOG_REORDER_ITEM_LIST,
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XLOG_REORDER_INODE_BUFFER_LIST,
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XLOG_REORDER_CANCEL_LIST,
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};
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struct xlog_recover_item_ops {
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uint16_t item_type; /* XFS_LI_* type code. */
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/*
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* Help sort recovered log items into the order required to replay them
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* correctly. Log item types that always use XLOG_REORDER_ITEM_LIST do
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* not have to supply a function here. See the comment preceding
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* xlog_recover_reorder_trans for more details about what the return
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* values mean.
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*/
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enum xlog_recover_reorder (*reorder)(struct xlog_recover_item *item);
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};
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extern const struct xlog_recover_item_ops xlog_icreate_item_ops;
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extern const struct xlog_recover_item_ops xlog_buf_item_ops;
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extern const struct xlog_recover_item_ops xlog_inode_item_ops;
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extern const struct xlog_recover_item_ops xlog_dquot_item_ops;
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extern const struct xlog_recover_item_ops xlog_quotaoff_item_ops;
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extern const struct xlog_recover_item_ops xlog_bui_item_ops;
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extern const struct xlog_recover_item_ops xlog_bud_item_ops;
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extern const struct xlog_recover_item_ops xlog_efi_item_ops;
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extern const struct xlog_recover_item_ops xlog_efd_item_ops;
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extern const struct xlog_recover_item_ops xlog_rui_item_ops;
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extern const struct xlog_recover_item_ops xlog_rud_item_ops;
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extern const struct xlog_recover_item_ops xlog_cui_item_ops;
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extern const struct xlog_recover_item_ops xlog_cud_item_ops;
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/*
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* Macros, structures, prototypes for internal log manager use.
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*/
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#define XLOG_RHASH_BITS 4
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#define XLOG_RHASH_SIZE 16
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#define XLOG_RHASH_SHIFT 2
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#define XLOG_RHASH(tid) \
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((((uint32_t)tid)>>XLOG_RHASH_SHIFT) & (XLOG_RHASH_SIZE-1))
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#define XLOG_MAX_REGIONS_IN_ITEM (XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK / 2 + 1)
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/*
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* item headers are in ri_buf[0]. Additional buffers follow.
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*/
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struct xlog_recover_item {
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struct list_head ri_list;
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int ri_cnt; /* count of regions found */
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int ri_total; /* total regions */
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struct xfs_log_iovec *ri_buf; /* ptr to regions buffer */
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const struct xlog_recover_item_ops *ri_ops;
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};
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struct xlog_recover {
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struct hlist_node r_list;
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xlog_tid_t r_log_tid; /* log's transaction id */
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xfs_trans_header_t r_theader; /* trans header for partial */
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int r_state; /* not needed */
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xfs_lsn_t r_lsn; /* xact lsn */
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struct list_head r_itemq; /* q for items */
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};
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#define ITEM_TYPE(i) (*(unsigned short *)(i)->ri_buf[0].i_addr)
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/*
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* This is the number of entries in the l_buf_cancel_table used during
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* recovery.
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*/
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#define XLOG_BC_TABLE_SIZE 64
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#define XLOG_RECOVER_CRCPASS 0
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#define XLOG_RECOVER_PASS1 1
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#define XLOG_RECOVER_PASS2 2
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#endif /* __XFS_LOG_RECOVER_H__ */
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