forked from Minki/linux
22c10589a1
The log recovery I/O completion handler does not substancially differ from
the normal one except for the fact that it:
a) never retries failed writes
b) can have log items that aren't on the AIL
c) never has inode/dquot log items attached and thus don't need to
handle them
Add conditionals for (a) and (b) to the ioend code, while (c) doesn't
need special handling anyway.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
129 lines
4.4 KiB
C
129 lines
4.4 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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/* Start readahead for pass2, if provided. */
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void (*ra_pass2)(struct xlog *log, struct xlog_recover_item *item);
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/* Do whatever work we need to do for pass1, if provided. */
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int (*commit_pass1)(struct xlog *log, struct xlog_recover_item *item);
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/*
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* This function should do whatever work is needed for pass2 of log
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* recovery, if provided.
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*
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* If the recovered item is an intent item, this function should parse
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* the recovered item to construct an in-core log intent item and
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* insert it into the AIL. The in-core log intent item should have 1
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* refcount so that the item is freed either (a) when we commit the
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* recovered log item for the intent-done item; (b) replay the work and
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* log a new intent-done item; or (c) recovery fails and we have to
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* abort.
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*
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* If the recovered item is an intent-done item, this function should
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* parse the recovered item to find the id of the corresponding intent
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* log item. Next, it should find the in-core log intent item in the
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* AIL and release it.
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*/
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int (*commit_pass2)(struct xlog *log, struct list_head *buffer_list,
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struct xlog_recover_item *item, xfs_lsn_t lsn);
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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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void xlog_buf_readahead(struct xlog *log, xfs_daddr_t blkno, uint len,
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const struct xfs_buf_ops *ops);
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bool xlog_is_buffer_cancelled(struct xlog *log, xfs_daddr_t blkno, uint len);
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void xlog_recover_release_intent(struct xlog *log, unsigned short intent_type,
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uint64_t intent_id);
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#endif /* __XFS_LOG_RECOVER_H__ */
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